CN105469006A - Electronic tag arousing method, electronic tag arousing device and electronic tag - Google Patents
Electronic tag arousing method, electronic tag arousing device and electronic tag Download PDFInfo
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Abstract
An embodiment of the invention discloses an electronic tag arousing method, an electronic tag arousing device and an electronic tag, wherein the electronic tag arousing method comprises the steps of receiving an RF signal; selecting a digital baseband signal of which the frequency corresponds with a preset frequency; comparing a data framehead carried in the digital baseband signal with a preset data framehead; and when the data framehead carried in the digital baseband signal corresponds with the preset data framehead, outputting an arousing signal which arouses the electronic tag. The electronic tag arousing method provided by the embodiment of the invention can perform arousing according to the use requirement of the electronic lag and prevents electronic tag arousing without use requirement. Furthermore the arousing signal is output according to the RF signal which is transmitted from an arousing party for the electronic tag for arousing the electronic tag, thereby reducing a mistaken arousing tag of the electronic tag by other RF signals, and increasing accurate arousing rate of the electronic tag.
Description
Technical field
The present invention relates to equipment awakening technology field, more particularly, relate to a kind of electronic tag awakening method, device and electronic tag.
Background technology
In the application of current intelligent transportation field, as electric non-stop toll (ETC), freely flow, all can use electronic tag in the system such as Path Recognition; Electronic tag comprises board units (OBU), the Anti-dismantling label etc. in OBU.Electronic tag in use, all can relate to the wakeup process of electronic tag; For OBU, RSU (roadside unit) is when communicating with board units (OBU), OBU wakes up with the data of wake-up signal by RSU by transmission, after OBU is waken up, to receive and radiating circuit completes and data interaction between RSU by starting.
In order to farthest reduce electronic tag power consumption, the electronic tag most of the time is all in Low-power-consumptiodormancy dormancy state, electronic tag only after receiving satisfactory wake-up signal, just each modular circuit can be started carry out work; Therefore the quality of electronic tag wake-up mode determines serviceability and the life-span of electronic tag.
At present, generally send wake-up signal by electronic label waking device, realize waking up of electronic tag, electronic label waking device can be built in electronic tag, also can exist independent of electronic tag.Conventional electronic tag wake-up mode is periodic wakeup, namely electronic label waking device timing send wake-up signal, thus timing wake electronic tag up; This electronic tag wake-up mode does not need to wake up according to the use of electronic tag, often there will be electronic tag and to be waken up and without the situation using needs, cause the power consumption of electronic tag comparatively greatly, serviceable life is lower.
Summary of the invention
In view of this; the embodiment of the present invention provides a kind of electronic tag awakening method, device and electronic tag; do not need to wake up according to the use of electronic tag to solve existing electronic tag wake-up mode; often there will be electronic tag be waken up and without the situation using needs, cause the problem that the power consumption of electronic tag is comparatively large, serviceable life is lower.
For achieving the above object, the embodiment of the present invention provides following technical scheme:
A kind of electronic tag awakening method, comprising:
Received RF signal;
The digital baseband signal that frequency is corresponding with preset frequency is selected from described radiofrequency signal;
Data frame head entrained by described digital baseband signal and tentation data frame head are compared;
When the data frame head entrained by described digital baseband signal is corresponding with tentation data frame head, export the wake-up signal waking electronic tag up.
Wherein, the described digital baseband signal selecting frequency corresponding with preset frequency from described radiofrequency signal comprises:
A. from described radiofrequency signal, high-frequency modulation signal is removed by first order circuit, obtain the digital baseband signal of low frequency, first amplification process is carried out to the digital baseband signal of described low frequency, reaches the first preset range with the level of the digital baseband signal after making the first amplification process;
B. the digital baseband signal corresponding with preset frequency is selected the digital baseband signal after amplifying process by second level circuit from first, second amplification process is carried out to the digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process, the digital baseband signal after amplifying process to second carries out waveform arrangement.
Wherein, also comprise between steps A and step B:
Emitter following derailing switch receive first order circuit export first amplify process after digital baseband signal time, be communicated with the built-in switch in emitter following derailing switch, be passed to second level circuit by described built-in switch by first order circuit with the digital baseband signal after making the first amplification process; Emitter following derailing switch do not receive first order circuit export first amplify process after digital baseband signal time, disconnect the built-in switch in described emitter following derailing switch;
Carry out temperature compensation process by temperature compensator to temperature compensator two ends institute connection circuit, described temperature compensator one end connects described first order circuit by described emitter following derailing switch, and the other end connects described second level circuit.
Wherein, the described digital baseband signal being selected low frequency by first order circuit from described high-frequency modulation signal, first amplification process is carried out to the digital baseband signal of described low frequency, reaches the first preset range with the level of the digital baseband signal after making the first amplification process and comprise:
From described radiofrequency signal, remove high-frequency modulation signal by detection detuner, obtain the digital baseband signal of low frequency;
By the first amplifier, the first amplification process is carried out to the digital baseband signal of described low frequency, reach the first preset range with the level of the digital baseband signal after making the first amplification process;
Described by second level circuit from first amplify process after digital baseband signal select the digital baseband signal corresponding with preset frequency, second amplification process is carried out to the digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process, the digital baseband signal after amplifying process to second carries out waveform and arranges and comprise:
The digital baseband signal corresponding with preset frequency is selected digital baseband signal after amplifying process by active band-pass filter from first;
Carry out the second amplification process by the second amplifier pair digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process;
Waveform arrangement is carried out by the digital baseband signal after reshaper amplifies process to second.
The embodiment of the present invention also provides a kind of electronic label waking device, comprising:
Receiver module, for received RF signal;
Choose module, for selecting the frequency digital baseband signal corresponding with preset frequency from described radiofrequency signal;
Comparing module, for comparing the data frame head entrained by described digital baseband signal and tentation data frame head;
Wake module, for when the data frame head entrained by described digital baseband signal is corresponding with tentation data frame head, exports the wake-up signal waking electronic tag up.
Wherein, choose module described in comprise:
First order circuit, for removing high-frequency modulation signal from described radiofrequency signal, obtain the digital baseband signal of low frequency, the first amplification process is carried out to the digital baseband signal of described low frequency, reach the first preset range with the level of the digital baseband signal after making the first amplification process;
Second level circuit, the digital baseband signal corresponding with preset frequency is selected for amplifying in the digital baseband signal after processing from first, second amplification process is carried out to the digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process, the digital baseband signal after amplifying process to second carries out waveform arrangement.
Wherein, choose module described in also to comprise:
The emitter following derailing switch be connected with described first order circuit, when described emitter following derailing switch is used for the digital baseband signal after receive the output of first order circuit first amplifies process, be communicated with the built-in switch in described logical emitter following derailing switch, be passed to second level circuit by described built-in switch by first order circuit with the digital baseband signal after making the first amplification process; When do not receive the output of first order circuit first amplifies the digital baseband signal after processing, disconnect the built-in switch in described emitter following derailing switch;
The temperature compensator be connected with described emitter following derailing switch and described second level circuit respectively, described temperature compensator is used for carrying out temperature compensation process to temperature compensator two ends institute connection circuit, described temperature compensator one end connects described first order circuit by described emitter following derailing switch, and the other end connects described second level circuit.
Wherein, described first order circuit comprises:
Detection detuner, for removing high-frequency modulation signal from described radiofrequency signal, obtains the digital baseband signal of low frequency;
First amplifier, for carrying out the first amplification process to the digital baseband signal of described low frequency, reaches the first preset range with the level of the digital baseband signal after making the first amplification process;
Described second level circuit comprises:
Active band-pass filter, selects the digital baseband signal corresponding with preset frequency for amplifying in the digital baseband signal after processing from first;
Second amplifier, for carrying out the second amplification process to the digital baseband signal corresponding with preset frequency, reaches the second preset range with the level of the digital baseband signal after making the second amplification process;
Reshaper, carries out waveform arrangement for the digital baseband signal after amplifying process to second.
The embodiment of the present invention also provides a kind of electronic tag, comprises electronic label waking device described above.
Based on technique scheme, the electronic tag awakening method that the embodiment of the present invention provides, after receiving radiofrequency signal, the frequency digital baseband signal corresponding with preset frequency can be selected from radiofrequency signal, and the data frame head entrained by the digital baseband signal of selected taking-up and tentation data frame head are compared, only when the data frame head entrained by digital baseband signal is corresponding with tentation data frame head, just export the wake-up signal waking electronic tag up, realize waking up of electronic tag.The electronic tag awakening method that the embodiment of the present invention provides, exports the condition of wake-up signal by arranging: radiofrequency signal is the frequency digital baseband signal corresponding with preset frequency, and digital baseband signal carries tentation data frame head; Successively carry out the comparison of the data frame head that the frequency selection purposes of signal and signal carry, only when received radiofrequency signal meets above-mentioned condition, electronic label waking device just determines that radiofrequency signal is that the side of waking up of electronic tag sends, thus exports wake-up signal; Therefore the electronic tag awakening method that the embodiment of the present invention provides can need to wake up according to the use of electronic tag, do not exist electronic tag be waken up and without use need situation, what the output of wake-up signal sent according to the side of waking up of electronic tag simultaneously carries out for the radiofrequency signal waking electronic tag up, thus decrease electronic tag by the probability of other radiofrequency signal false wake-ups, improve the accuracy rate that electronic tag wakes up.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The process flow diagram of the electronic tag awakening method that Fig. 1 provides for the embodiment of the present invention;
The method flow diagram selecting the frequency digital baseband signal corresponding with preset frequency from radiofrequency signal that Fig. 2 provides for the embodiment of the present invention;
The other method process flow diagram selecting the frequency digital baseband signal corresponding with preset frequency from radiofrequency signal that Fig. 3 provides for the embodiment of the present invention;
The method flow diagram again selecting the frequency digital baseband signal corresponding with preset frequency from radiofrequency signal that Fig. 4 provides for the embodiment of the present invention;
Another process flow diagram of the electronic tag awakening method that Fig. 5 provides for the embodiment of the present invention;
The structural representation of the electronic label waking device that Fig. 6 provides for the embodiment of the present invention;
The structural representation choosing module that Fig. 7 provides for the embodiment of the present invention;
The structural representation of the first order circuit that Fig. 8 provides for the embodiment of the present invention;
The structural representation of the second level circuit that Fig. 9 provides for the embodiment of the present invention;
Another structural representation choosing module that Figure 10 provides for the embodiment of the present invention;
The structural representation again choosing module that Figure 11 provides for the embodiment of the present invention;
The another structural representation choosing module that Figure 12 provides for the embodiment of the present invention;
The another structural representation of the electronic label waking device that Figure 13 provides for the embodiment of the present invention;
The structural representation of the OBU that Figure 14 provides for the embodiment of the present invention;
The system schematic realizing application examples that Figure 15 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The process flow diagram of the electronic tag awakening method that Fig. 1 provides for the embodiment of the present invention, the method can be applicable to electronic label waking device, and with reference to Fig. 1, the method can comprise:
Step S100, received RF signal;
Optionally, by the radio-frequency antenna received RF signal of electronic tag;
The digital baseband signal carrying tentation data frame head that the side of waking up that radiofrequency signal can comprise electronic tag sends; As electronic tag be OBU time, waking up of electronic tag can think RSU (roadside unit), then RSU sends by the mode of radiofrequency signal the digital baseband signal carrying tentation data frame head, thus makes electronic label waking device can receive this digital baseband signal by the radio-frequency antenna of OBU.
Step S110, from described radiofrequency signal, select the frequency digital baseband signal corresponding with preset frequency;
Optionally, due to environmental interference, the radiofrequency signal received, except the digital baseband signal carrying tentation data frame head that the side of waking up of electronic tag sends in the mode of radiofrequency signal, also may comprise other undesired signals such as high-frequency modulation signal; Therefore the embodiment of the present invention need be carried out signal to received radiofrequency signal and chosen and process, and selects the digital baseband signal that signal frequency is corresponding with preset frequency from radiofrequency signal; Corresponding, the side of waking up of electronic tag preset frequency can send the digital baseband signal carrying tentation data frame head.
Optionally, preset frequency can be low frequency, and is the frequency of 256K or 512K or its common divisor.Obviously, preset frequency also can be the frequency of low frequency, other setpoint frequency numerical value, is determined by embody rule situation.
Step S120, the data frame head entrained by described digital baseband signal and tentation data frame head to be compared;
Optionally, after selecting the digital baseband signal corresponding with preset frequency, decoding process can be carried out to described digital baseband signal, obtain data frame head entrained in described digital baseband signal, obtained data frame head and predetermined data frame head are compared.Optionally, tentation data frame head can be the embodiment of the present invention pre-set can wake-up signal export data frame head.
Step S130, when the data frame head entrained by described digital baseband signal is corresponding with tentation data frame head, exports and wake the wake-up signal of electronic tag up.
Data frame head entrained by described digital baseband signal is corresponding with tentation data frame head, illustrates that digital baseband signal that electronic label waking device receives is the signal for waking electronic tag up that the side of waking up of electronic tag sends; Now need to wake up electronic tag, therefore the exportable wake-up signal waking electronic tag up of electronic label waking device, to wake up accurately electronic tag.
Optionally, tentation data frame head is chosen as data frame head 0x7E, following table 1 show there is 0x7E data frame head and signal frequency is the data layout schematic diagram of the radiofrequency signal of 256K, can reference be carried out:
Table 1
Obviously, tentation data frame head, preset frequency numerical value also can be determined according to practical situations.
Corresponding, the radiofrequency signal that the side of waking up of electronic tag sends should have following characteristic: radiofrequency signal is the frequency digital baseband signal corresponding with preset frequency, and carries tentation data frame head.
The electronic tag awakening method that the embodiment of the present invention provides, after receiving radiofrequency signal, the frequency digital baseband signal corresponding with preset frequency can be selected from radiofrequency signal, and the data frame head entrained by the digital baseband signal of selected taking-up and tentation data frame head are compared, only when the data frame head entrained by digital baseband signal is corresponding with tentation data frame head, just export the wake-up signal waking electronic tag up, realize waking up of electronic tag.The electronic tag awakening method that the embodiment of the present invention provides, exports the condition of wake-up signal by arranging: radiofrequency signal is the frequency digital baseband signal corresponding with preset frequency, and digital baseband signal carries tentation data frame head; Successively carry out the comparison of the data frame head that the frequency selection purposes of signal and signal carry, only when received radiofrequency signal meets above-mentioned condition, electronic label waking device just determines that radiofrequency signal is that the side of waking up of electronic tag sends, thus exports wake-up signal; Therefore the electronic tag awakening method that the embodiment of the present invention provides can need to wake up according to the use of electronic tag, do not exist electronic tag be waken up and without use need situation, what the output of wake-up signal sent according to the side of waking up of electronic tag simultaneously carries out for the radiofrequency signal waking electronic tag up, thus decrease electronic tag by the probability of other radiofrequency signal false wake-ups, improve the accuracy rate that electronic tag wakes up.
Optionally, the mode selecting the frequency digital baseband signal corresponding with preset frequency from described radiofrequency signal can be divided into two stages:
One, choose the digital baseband signal of low frequency, and carry out amplification process;
Two, from the digital baseband signal that low frequency amplifies, choose the digital baseband signal corresponding with preset frequency, and the digital baseband signal chosen is amplified and waveform arrangement.
Corresponding, Fig. 2 shows the method flow diagram selecting the frequency digital baseband signal corresponding with preset frequency from radiofrequency signal that the embodiment of the present invention provides, and with reference to Fig. 2, the method can comprise:
Step S200, from described radiofrequency signal, remove high-frequency modulation signal, obtain the digital baseband signal of low frequency, first amplification process is carried out to the digital baseband signal of described low frequency, reaches the first preset range with the level of the digital baseband signal after making the first amplification process;
Optionally, step S200 completes by first order circuit, and the function that first order circuit will realize mainly contains:
Carry out detection demodulation process, from radiofrequency signal, remove high-frequency modulation signal, obtain the digital baseband signal of low frequency;
Carry out first time signal amplification process, amplify the digital baseband signal of low frequency, make signal level reach the first preset range, so that subsequent process circuit can identify the digital baseband signal of this low frequency.
It should be noted that for radiofrequency signal field, those skilled in the art can know which type of signal is high-frequency signal, and which type of signal is low frequency signal; The identification of high-frequency signal and low frequency signal is determined by actual signal applicable cases.
Step S210, from first amplify process after digital baseband signal select the digital baseband signal corresponding with preset frequency, second amplification process is carried out to the digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process, the digital baseband signal after amplifying process to second carries out waveform arrangement.
Corresponding, the data frame head entrained by digital baseband signal after waveform can arrange by the embodiment of the present invention and tentation data frame head are compared, thus when the data frame head entrained by digital baseband signal is corresponding with tentation data frame head, export the wake-up signal waking electronic tag up.
Optionally, step S210 completes by second level circuit, and the function that second level circuit will realize mainly contains:
Bandpass filtering, selects with preset frequency corresponding digital baseband signal the digital baseband signal after amplifying process from first;
Carry out second time signal and amplify process, carry out amplification process to the digital baseband signal corresponding with preset frequency, the level of amplifier digital baseband signal reaches the second preset range;
Waveform arranges, and the digital baseband signal after amplifying process to second time carries out waveform arrangement.
Optionally, the detection demodulation process of first order circuit can be completed by detection detuner, and first time signal amplification process can be completed by the first amplifier; The bandpass filtering treatment of second level circuit can be completed by active band-pass filter, and second time signal amplifies process can be completed by the second amplifier, and waveform arranges and can be completed by reshaper.Corresponding, Fig. 3 shows the other method process flow diagram selecting the frequency digital baseband signal corresponding with preset frequency from radiofrequency signal that the embodiment of the present invention provides, and with reference to Fig. 3, the method can comprise:
Step S300, from described radiofrequency signal, remove high-frequency modulation signal by detection detuner, obtain the digital baseband signal of low frequency;
Step S310, by the first amplifier, the first amplification process is carried out to the digital baseband signal of described low frequency, reach the first preset range with the level of the digital baseband signal after making the first amplification process;
Step S320, by active band-pass filter from first amplify process after digital baseband signal select the digital baseband signal corresponding with preset frequency;
Step S330, carry out the second amplification process by the second amplifier pair digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process;
Step S340, by reshaper to second amplify process after digital baseband signal carry out waveform arrangement.
It should be noted that the functional realiey mode of above-described first order circuit and second level circuit is only optional manner, on the basis of disclosing first order circuit and second level circuit function, those skilled in the art also can determine other circuit implementations easily.
Optionally, for the break-make between first order circuit and second level circuit, the embodiment of the present invention realizes by emitter following derailing switch, thus controls the overall power of circuit.Optionally, detection demodulation process and first time signal amplification process is carried out by first order circuit radio frequency signal in the embodiment of the present invention, bandpass filtering treatment is carried out by second level circuit radio frequency signal, when second time signal amplifies process and waveform arrangement, the embodiment of the present invention can also emitter following derailing switch receive first order circuit export first amplify process after digital baseband signal time, be communicated with the built-in switch in emitter following derailing switch, second level circuit is passed to by described built-in switch by first order circuit with the digital baseband signal after making the first amplification process, emitter following derailing switch do not receive first order circuit export first amplify process after digital baseband signal time, disconnect the built-in switch in described emitter following derailing switch.
Corresponding, Fig. 4 shows the method flow diagram again selecting the frequency digital baseband signal corresponding with preset frequency from radiofrequency signal that the embodiment of the present invention provides, and with reference to Fig. 4, the method can comprise:
Step S400, from described radiofrequency signal, remove high-frequency modulation signal by first order circuit, obtain the digital baseband signal of low frequency, first amplification process is carried out to the digital baseband signal of described low frequency, reaches the first preset range with the level of the digital baseband signal after making the first amplification process;
Step S410, emitter following derailing switch receive first order circuit export first amplify process after digital baseband signal time, be communicated with the built-in switch in emitter following derailing switch, be passed to second level circuit by described built-in switch by first order circuit with the digital baseband signal after making the first amplification process;
Optionally, emitter following derailing switch do not receive first order circuit export first amplify process after digital baseband signal time, the embodiment of the present invention can disconnect the built-in switch in described emitter following derailing switch, thus disconnects first order circuit and second level circuit, reduces the overall power of circuit.
Step S420, by second level circuit from first amplify process after digital baseband signal select the digital baseband signal corresponding with preset frequency, second amplification process is carried out to the digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process, the digital baseband signal after amplifying process to second carries out waveform arrangement.
Optionally, the embodiment of the present invention can carry out temperature compensation process to first order circuit and second level circuit, ensures that first order circuit is the same with the circuit variation of second circuit, ensures that the work schedule of integrated circuit entanglement does not occur.Corresponding, what the embodiment of the present invention provided select the frequency digital baseband signal corresponding with preset frequency from radiofrequency signal also can comprise the steps:
Carry out temperature compensation process by temperature compensator to temperature compensator two ends institute connection circuit, described temperature compensator one end connects described first order circuit by described emitter following derailing switch, and the other end connects described second level circuit.
Optionally, above-mentioned step of carrying out temperature compensation process can perform between the step S410 of method shown in Fig. 4 and step S420.
From the side of waking up of electronic tag and the angle of electronic label waking device, the electronic tag awakening method that the embodiment of the present invention provides is introduced below.Electronic tag awakening method described below can corresponding reference mutual to above-described electronic tag awakening method.
Another process flow diagram of the electronic tag awakening method that Fig. 5 provides for the embodiment of the present invention, with reference to Fig. 5, the method can comprise:
The digital baseband signal that the side's of waking up generated frequency of step S500, electronic tag is corresponding with preset frequency, and tentation data frame head is carried in described digital baseband signal;
The side of waking up of step S510, electronic tag sends described digital baseband signal in radiofrequency signal mode;
Step S520, electronic label waking device received RF signal;
Optionally, electronic label waking device is by the radio-frequency antenna received RF signal of electronic tag; Electronic label waking device also can establish radio-frequency antenna certainly, realizes the reception of radiofrequency signal.
Step S530, electronic label waking device select the frequency digital baseband signal corresponding with preset frequency from described radiofrequency signal;
Data frame head entrained by described digital baseband signal and tentation data frame head are compared by step S540, electronic label waking device;
Step S550, electronic label waking device, when determining that the data frame head entrained by described digital baseband signal is corresponding with tentation data frame head, export the wake-up signal waking electronic tag up.
The electronic tag awakening method that the embodiment of the present invention provides, exports the condition of wake-up signal by arranging: radiofrequency signal is the frequency digital baseband signal corresponding with preset frequency, and digital baseband signal carries tentation data frame head; Successively carry out the comparison of the data frame head that the frequency selection purposes of signal and signal carry, only when received radiofrequency signal meets above-mentioned condition, electronic label waking device just determines that radiofrequency signal is that the side of waking up of electronic tag sends, thus exports wake-up signal; Therefore the electronic tag awakening method that the embodiment of the present invention provides can need to wake up according to the use of electronic tag, do not exist electronic tag be waken up and without use need situation, what the output of wake-up signal sent according to the side of waking up of electronic tag simultaneously carries out for the radiofrequency signal waking electronic tag up, thus decrease electronic tag by the probability of other radiofrequency signal false wake-ups, improve the accuracy rate that electronic tag wakes up.
Be introduced the electronic label waking device that the embodiment of the present invention provides below, electronic label waking device described below can corresponding reference mutual to above-described electronic tag awakening method.
The structural representation of the electronic label waking device that Fig. 6 provides for the embodiment of the present invention, with reference to Fig. 6, this electronic label waking device can comprise:
Receiver module 100, for received RF signal;
Optionally, receiver module 100 is by the radio-frequency antenna received RF signal of electronic tag; Radiofrequency signal, after radiofrequency signal being detected, can be passed to electronic label waking device by the radio-frequency antenna of electronic tag, thus realizes the reception of electronic label waking device radio frequency signal.Obviously, electronic label waking device also can establish radio-frequency antenna certainly, realizes the reception of radiofrequency signal.
Choose module 200, for selecting the frequency digital baseband signal corresponding with preset frequency from described radiofrequency signal;
Comparing module 300, for comparing the data frame head entrained by described digital baseband signal and tentation data frame head;
Optionally, comparing module 300 can be made up of comparer, also can be made up of the processor chips with comparing function.
Wake module 400, for when the data frame head entrained by described digital baseband signal is corresponding with tentation data frame head, exports the wake-up signal waking electronic tag up.
Optionally, receiver module 100, chooses module 200, and the function of comparing module 300 and wake module 400 can realize by hardware circuit.
Optionally, choose module 200 and can comprise first order circuit and second level circuit; Corresponding, Fig. 7 shows a kind of alternate configurations schematic diagram choosing module 200, and with reference to Fig. 7, choosing module 200 can comprise:
First order circuit 210, for removing high-frequency modulation signal from described radiofrequency signal, obtain the digital baseband signal of low frequency, the first amplification process is carried out to the digital baseband signal of described low frequency, reach the first preset range with the level of the digital baseband signal after making the first amplification process;
Second level circuit 220, the digital baseband signal corresponding with preset frequency is selected for amplifying in the digital baseband signal after processing from first, second amplification process is carried out to the digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process, the digital baseband signal after amplifying process to second carries out waveform arrangement.
Optionally, first order circuit 210 can realize removing high-frequency modulation signal from described radiofrequency signal by detection detuner, obtains the digital baseband signal of low frequency, realizes carrying out the first amplification process to the digital baseband signal of described low frequency by the first amplifier.Corresponding, Fig. 8 shows a kind of alternate configurations schematic diagram of the first order circuit 210 that the embodiment of the present invention provides, and with reference to Fig. 8, first order circuit 210 can comprise:
Detection detuner 2101, for removing high-frequency modulation signal from described radiofrequency signal, obtains the digital baseband signal of low frequency;
Optionally, detection detuner 2101 can remove the high-frequency modulation signals such as the 5.83G/5.84G in radiofrequency signal, obtains the digital baseband signal of low frequency; Detection detuner 2101 can select HSMS-2850 or the HSMS-2860 series transistor of Avago.
First amplifier 2102, for carrying out the first amplification process to the digital baseband signal of described low frequency, reaches the first preset range with the level of the digital baseband signal after making the first amplification process.
Radiofrequency signal is in the decay through space, amplitude is very low, by the first amplifier, signal is carried out to the digital baseband signal of low frequency and amplify process, the low and high level that the voltage of digital baseband signal can be made to reach subsequent conditioning circuit can identify, so that subsequent conditioning circuit is to the further process of digital baseband signal.
Optionally, second level circuit 220 realizes selecting the digital baseband signal corresponding with preset frequency the digital baseband signal after amplifying process from first by active band-pass filter, carry out the second amplification process by the second amplifier pair digital baseband signal corresponding with preset frequency, carry out waveform arrangement by the digital baseband signal after reshaper amplifies process to second.Corresponding, Fig. 9 shows a kind of alternate configurations schematic diagram of second level circuit 220, and with reference to Fig. 9, second level circuit 220 can comprise:
Active band-pass filter 2201, selects the digital baseband signal corresponding with preset frequency for amplifying in the digital baseband signal after processing from first;
Active band-pass filter can realize the signal behavior of preset frequency from low frequency digital baseband signal; Optionally, active band-pass filter 2201 can select the digital baseband signal that signal frequency is 256K or 512K or its common divisor, and obviously, concrete preset frequency numerical value is also determined by actual service condition.
Second amplifier 2202, for carrying out the second amplification process to the digital baseband signal corresponding with preset frequency, reaches the second preset range with the level of the digital baseband signal after making the second amplification process;
Digital baseband signal is after active band-pass filter, signal will have certain decay, second amplification process is carried out to the digital baseband signal after active band-pass filter, the follow-up shaping to digital baseband signal and decoding (the data frame head that can parse entrained by digital baseband signal of decoding) can be ensured.
Reshaper 2203, carries out waveform arrangement for the digital baseband signal after amplifying process to second.
Digital baseband signal may not be the square-wave signal (being generally triangle or sawtooth wave etc.) of standard through a series of process, digital baseband signal can be shaped as the square-wave signal of standard, so that subsequent decoding process by reshaper.
Corresponding, Figure 10 shows the another kind of alternate configurations schematic diagram choosing module 200, can carry out reference.
Optionally, for the break-make between first order circuit and second level circuit, the embodiment of the present invention realizes by emitter following derailing switch, thus controls the overall power of circuit.Corresponding, Figure 11 shows the structural representation again choosing module that the embodiment of the present invention provides, and shown in composition graphs 7 and Figure 11, choosing module 200 can also comprise;
Wherein, emitter following derailing switch 230, during for amplifying the digital baseband signal after processing receive the output of first order circuit first, be communicated with the built-in switch in described logical emitter following derailing switch, be passed to second level circuit by described built-in switch by first order circuit with the digital baseband signal after making the first amplification process; When do not receive the output of first order circuit first amplifies the digital baseband signal after processing, disconnect the built-in switch in described emitter following derailing switch.
Optionally, the embodiment of the present invention can carry out temperature compensation process to first order circuit and second level circuit, ensures that first order circuit is the same with the circuit variation of second circuit, ensures that the work schedule of integrated circuit entanglement does not occur.Corresponding, Figure 12 shows the another structural representation choosing module that the embodiment of the present invention provides, and shown in Figure 11 and Figure 12, choosing module 200 can also comprise: temperature compensator 240; Temperature compensator 240 one end connects first order circuit 210 by emitter following derailing switch 230, and the other end connects second level circuit 220;
Temperature compensator 240, can be used for carrying out temperature compensation process to temperature compensator two ends institute connection circuit.
Optionally, temperature compensator 240 at least can comprise two transistors; Temperature compensator 240 can ensure that the circuit variation of front and back end is the same, and as under high temperature, the transistor turn-on voltage of front end changes, and so the transistor of rear end also and then one changes, and ensures that the work schedule of integrated circuit entanglement can not occur.
Optionally, the first order circuit in shown in Figure 11 or Figure 12 can have structure shown in Fig. 8, and second level circuit can have structure shown in Fig. 9.
The electronic label waking device that the embodiment of the present invention provides, after receiver module receives radiofrequency signal, choose module and will remove high-frequency modulation signal from described radiofrequency signal, obtain the digital baseband signal of low frequency, and then the data frame head entrained by described digital baseband signal and tentation data frame head are compared by comparing module, thus make wake module at the comparison result of comparing module for when the data frame head entrained by described digital baseband signal is corresponding with tentation data frame head, export wake electronic tag up wake letter up, realize waking up of electronic tag.The electronic label waking device that the embodiment of the present invention provides is only the frequency digital baseband signal corresponding with preset frequency in radiofrequency signal, and digital baseband signal is when carrying tentation data frame head, just determine that radiofrequency signal is that the side of waking up of electronic tag sends, thus export wake-up signal; Therefore the electronic tag awakening method that the embodiment of the present invention provides can need to wake up according to the use of electronic tag, do not exist electronic tag be waken up and without use need situation, what the output of wake-up signal sent according to the side of waking up of electronic tag simultaneously carries out for the radiofrequency signal waking electronic tag up, thus decrease electronic tag by the probability of other radiofrequency signal false wake-ups, improve the accuracy rate that electronic tag wakes up.
Optionally, in embodiments of the present invention, detection detuner can comprise: diode and electric capacity; Emitter following derailing switch can comprise: isolator and capacitive impedance; Temperature compensator can comprise: isolator, capacitive impedance and inductive impedance; Active band-pass filter can comprise: inductive impedance and electric capacity; Reshaper can comprise: capacitive impedance, amplifier 1, inductance capacitance, electric capacity and amplifier 2; Comparing module 300 can be comparer.Corresponding, Figure 13 shows the another structural representation of the electronic label waking device that the embodiment of the present invention provides, and can carry out reference.It should be noted that detection detuner described above, emitter following derailing switch, temperature compensator, the structure of active band-pass filter and reshaper can be applicable to Fig. 8 ~ Figure 12 shown device.
The embodiment of the present invention also provides a kind of electronic tag, and this electronic tag can comprise electronic label waking device described above, and the specific descriptions for electronic label waking device see the description of corresponding part above, can repeat no more herein.
Take electronic tag as OBU be example, electronic label waking device can be arranged in OBU, and electronic label waking device can connect with the radio-frequency antenna of OBU, and the exportable wake-up signal of electronic label waking device is to the main control chip of OBU, realizes waking up of OBU.Corresponding, Figure 14 shows a kind of alternate configurations schematic diagram of OBU, and as shown in figure 14, OBU can comprise: radio-frequency antenna 1, electronic label waking device 2, main control chip 3; Main control chip 3 can be connected with other function module circuits of OBU; Electronic label waking device 2 realizes by wired or wireless mode and the communication connection of radio-frequency antenna 1 and main control chip 3, realizes the data interaction of electronic label waking device 2 and radio-frequency antenna 1 and main control chip 3.
The embodiment of the present invention also provides a kind of motor vehicle, and this motor vehicle can comprise the electronic tag with electronic label waking device described above; As motor vehicle can comprise the OBU with electronic label waking device described above.
Be hereafter OBU with electronic tag be example, carry out data interaction for scene with OBU and RSU, the application examples of the electronic tag awakening method that the embodiment of the present invention provides is introduced.Corresponding, Figure 15 shows the system schematic realizing application examples, and with reference to Figure 15, this system comprises: RSU10, OBU20 and electronic label waking device 30; Wherein, electronic label waking device 30 can be arranged in OBU20, also can independently and OBU20 arrange, but can carry out data interaction with OBU20, Figure 15 shows electronic label waking device 30 and is arranged at situation in OBU20; OBU20 is arranged in motor vehicle 40; RSU10 is arranged at trackside, and in preset range, send the digital baseband signal carrying tentation data frame head with preset frequency in the mode of radiofrequency signal.
Motor vehicle 40 drive to there is RSU10 road on time (during as ETC passage), electronic label waking device 30 by the radio-frequency antenna of OBU20 receive RSU10 send radiofrequency signal; Obviously, electronic label waking device 30 also can establish radio-frequency antenna to receive the radiofrequency signal of RSU10 transmission certainly, and does not rely on the radio-frequency antenna of OBU20;
Electronic label waking device 30 will select the frequency digital baseband signal corresponding with preset frequency from received radiofrequency signal, data frame head entrained by described digital baseband signal and tentation data frame head are compared, and when the data frame head entrained by described digital baseband signal is corresponding with tentation data frame head, export the wake-up signal (as the main control chip to OBU20 exports wake-up signal, to activate the service part in OBU20) waking OBU20 up;
OBU20, after receiving wake-up signal, can carry out power-on initialization operation, starts each modular circuit in OBU20, completes waking up of OBU;
OBU20 and RSU10 after waking up carries out data interaction, and after data interaction terminates, OBU20 carries out dormant state, waits for again waking up of electronic label waking device 30.
Obviously, electronic tag also can need to be waken up for Anti-dismantling label etc. the equipment that signal wakes up.Take electronic tag as Anti-dismantling label be example, the side of waking up (as OBU) of Anti-dismantling label is when needs wake Anti-dismantling label up, the digital baseband signal carrying tentation data frame head with preset frequency can be sent, electronic label waking device is (reception by certainly establishing radio-frequency antenna to realize radiofrequency signal) after receiving radiofrequency signal, the frequency digital baseband signal corresponding with preset frequency will be selected from received radiofrequency signal, data frame head entrained by described digital baseband signal and tentation data frame head are compared, and when the data frame head entrained by described digital baseband signal is corresponding with tentation data frame head, export the wake-up signal waking Anti-dismantling label up, thus realize waking up of Anti-dismantling label.
The electronic tag awakening method that the embodiment of the present invention provides can need to wake up according to the use of electronic tag, do not exist electronic tag be waken up and without use need situation, what the output of wake-up signal sent according to the side of waking up of electronic tag simultaneously carries out for the radiofrequency signal waking electronic tag up, thus decrease electronic tag by the probability of other radiofrequency signal false wake-ups, improve the accuracy rate that electronic tag wakes up.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. an electronic tag awakening method, is characterized in that, comprising:
Received RF signal;
The digital baseband signal that frequency is corresponding with preset frequency is selected from described radiofrequency signal;
Data frame head entrained by described digital baseband signal and tentation data frame head are compared;
When the data frame head entrained by described digital baseband signal is corresponding with tentation data frame head, export the wake-up signal waking electronic tag up.
2. electronic tag awakening method according to claim 1, is characterized in that, the described digital baseband signal selecting frequency corresponding with preset frequency from described radiofrequency signal comprises:
A. from described radiofrequency signal, high-frequency modulation signal is removed by first order circuit, obtain the digital baseband signal of low frequency, first amplification process is carried out to the digital baseband signal of described low frequency, reaches the first preset range with the level of the digital baseband signal after making the first amplification process;
B. the digital baseband signal corresponding with preset frequency is selected the digital baseband signal after amplifying process by second level circuit from first, second amplification process is carried out to the digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process, the digital baseband signal after amplifying process to second carries out waveform arrangement.
3. electronic tag awakening method according to claim 2, is characterized in that, also comprise between steps A and step B:
Emitter following derailing switch receive first order circuit export first amplify process after digital baseband signal time, be communicated with the built-in switch in emitter following derailing switch, be passed to second level circuit by described built-in switch by first order circuit with the digital baseband signal after making the first amplification process; Emitter following derailing switch do not receive first order circuit export first amplify process after digital baseband signal time, disconnect the built-in switch in described emitter following derailing switch;
Carry out temperature compensation process by temperature compensator to temperature compensator two ends institute connection circuit, described temperature compensator one end connects described first order circuit by described emitter following derailing switch, and the other end connects described second level circuit.
4. the electronic tag awakening method according to Claims 2 or 3, it is characterized in that, the described digital baseband signal being selected low frequency by first order circuit from described high-frequency modulation signal, first amplification process is carried out to the digital baseband signal of described low frequency, reaches the first preset range with the level of the digital baseband signal after making the first amplification process and comprise:
From described radiofrequency signal, remove high-frequency modulation signal by detection detuner, obtain the digital baseband signal of low frequency;
By the first amplifier, the first amplification process is carried out to the digital baseband signal of described low frequency, reach the first preset range with the level of the digital baseband signal after making the first amplification process;
Described by second level circuit from first amplify process after digital baseband signal select the digital baseband signal corresponding with preset frequency, second amplification process is carried out to the digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process, the digital baseband signal after amplifying process to second carries out waveform and arranges and comprise:
The digital baseband signal corresponding with preset frequency is selected digital baseband signal after amplifying process by active band-pass filter from first;
Carry out the second amplification process by the second amplifier pair digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process;
Waveform arrangement is carried out by the digital baseband signal after reshaper amplifies process to second.
5. an electronic label waking device, is characterized in that, comprising:
Receiver module, for received RF signal;
Choose module, for selecting the frequency digital baseband signal corresponding with preset frequency from described radiofrequency signal;
Comparing module, for comparing the data frame head entrained by described digital baseband signal and tentation data frame head;
Wake module, for when the data frame head entrained by described digital baseband signal is corresponding with tentation data frame head, exports the wake-up signal waking electronic tag up.
6. electronic label waking device according to claim 5, is characterized in that, described in choose module and comprise:
First order circuit, for removing high-frequency modulation signal from described radiofrequency signal, obtain the digital baseband signal of low frequency, the first amplification process is carried out to the digital baseband signal of described low frequency, reach the first preset range with the level of the digital baseband signal after making the first amplification process;
Second level circuit, the digital baseband signal corresponding with preset frequency is selected for amplifying in the digital baseband signal after processing from first, second amplification process is carried out to the digital baseband signal corresponding with preset frequency, reach the second preset range with the level of the digital baseband signal after making the second amplification process, the digital baseband signal after amplifying process to second carries out waveform arrangement.
7. electronic label waking device according to claim 6, is characterized in that, described in choose module and also comprise:
The emitter following derailing switch be connected with described first order circuit, when described emitter following derailing switch is used for the digital baseband signal after receive the output of first order circuit first amplifies process, be communicated with the built-in switch in described logical emitter following derailing switch, be passed to second level circuit by described built-in switch by first order circuit with the digital baseband signal after making the first amplification process; When do not receive the output of first order circuit first amplifies the digital baseband signal after processing, disconnect the built-in switch in described emitter following derailing switch;
The temperature compensator be connected with described emitter following derailing switch and described second level circuit respectively, described temperature compensator is used for carrying out temperature compensation process to temperature compensator two ends institute connection circuit, described temperature compensator one end connects described first order circuit by described emitter following derailing switch, and the other end connects described second level circuit.
8. the electronic label waking device according to claim 6 or 7, is characterized in that, described first order circuit comprises:
Detection detuner, for removing high-frequency modulation signal from described radiofrequency signal, obtains the digital baseband signal of low frequency;
First amplifier, for carrying out the first amplification process to the digital baseband signal of described low frequency, reaches the first preset range with the level of the digital baseband signal after making the first amplification process;
Described second level circuit comprises:
Active band-pass filter, selects the digital baseband signal corresponding with preset frequency for amplifying in the digital baseband signal after processing from first;
Second amplifier, for carrying out the second amplification process to the digital baseband signal corresponding with preset frequency, reaches the second preset range with the level of the digital baseband signal after making the second amplification process;
Reshaper, carries out waveform arrangement for the digital baseband signal after amplifying process to second.
9. an electronic tag, is characterized in that, comprises the electronic label waking device described in any one of claim 5-8.
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