CN203166901U - Low-frequency wireless bidirectional through-the-ground communication apparatus - Google Patents
Low-frequency wireless bidirectional through-the-ground communication apparatus Download PDFInfo
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- CN203166901U CN203166901U CN2013202141927U CN201320214192U CN203166901U CN 203166901 U CN203166901 U CN 203166901U CN 2013202141927 U CN2013202141927 U CN 2013202141927U CN 201320214192 U CN201320214192 U CN 201320214192U CN 203166901 U CN203166901 U CN 203166901U
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Abstract
The utility model provides a low-frequency wireless bidirectional through-the-ground communication apparatus, comprising a sound input module, a sound output module, a signal processing module, a signal input module and a signal output module which are connected with one another. The signal processing module comprises a frequency conversion control unit. A sound signal received by the sound input module is subjected to down conversion by the frequency conversion control unit and then is transmitted to the signal output module so as to for a signal transmission mode. A signal received by the signal input module is subjected to up conversion by the frequency conversion control unit and then is transmitted to the sound output module so as to form a signal reception mode. The low-frequency wireless bidirectional through-the-ground communication apparatus has the beneficial effects that voice communication with low safe power is realized under a mine or in an inflammable gas-containing environment, bidirectional voice and data communication is realized, delay time is short, and the low-frequency wireless bidirectional through-the-ground communication apparatus is completely suitable for emergency communication in disaster relief and rescue.
Description
Technical field
The utility model relates to a kind of low frequency wireless two-way communication device thoroughly.
Background technology
At present, at underground mine, in the environment such as industrial structure and commercial mansion, transmission of electromagnetic energy is subjected to stopping of medium or barrier or limits, and communication realizes by hard circuit such as telephone wire.But when disaster took place, the tunnel was blocked, power breakdown, and the hard circuit is destroyed, and how setting up the valid wireless communication between on disaster generation area and the mine under mine just becomes a problem.
But the transmitting saturatingly and brought other problem of signal, the plant capacity that can use safely in the mine is very limited, because the existence of dangerous imflammable gas, storable energy has certain restriction in the middle of making antenna, therefore, in order to guarantee safety, can use the lower equipment of power in the mine to the greatest extent.But the low power transmissions device only can send single-tone tone or arrowband text message.High-quality speech information and large-capacity data information can't send by the low power transmissions device.In addition, the electromagnetic field that frequency is higher than 10kHZ can't be coupled thoroughly, and high-frequency decay is very serious, therefore outwards transmits real hardly from mine or cavern.Surface water and water body also can form similar frequency limitation, so can only use the following very low frequency of 10Khz to transmit.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, providing a kind of has solved under mine or imflammable gas exists under the environment, realized speech communication with lower firm power, realized two-way voice-and-data communication, time of delay is short, and the low frequency wireless two-way that is applicable to the disaster relief, rescue fully is communication device thoroughly.
A kind of low frequency wireless two-way that provides according to the utility model main technical schemes that adopts of communication device thoroughly is: comprise the sound input module, voice output module, signal processing module, signal input module and the signal output module that are connected, described signal processing module comprises the lifting frequency control unit, and the voice signal that described sound input module receives imports described signal output module into and constitutes signal transfer mode after the frequency reducing of described lifting frequency control unit; The signal that described signal input module receives imports described voice output module into and constitutes signal receiving modes behind described lifting frequency control unit raising frequency.
The low frequency wireless two-way that the utility model provides communication device thoroughly also can have following attached technical characterictic:
Described signal processing module also comprises analogue-to-digital converters, digital-analog convertor and memory, under signal transfer mode, described analogue-to-digital converters are sent into described memory storage with the voice signal that described sound input module receives after sampling, quantification, described lifting frequency control unit converts analog signal to by described digital-analog convertor and exports described signal output module to by reducing the reading rate of described memory; Under signal receiving modes, described analogue-to-digital converters are sent into described memory storage with the signal that described signal input module receives after sampling, quantification, described lifting frequency control unit converts analog signal to by described digital-analog convertor and exports described voice output module to by improving the reading rate of described memory.
Under signal transfer mode, the bandwidth after described memory reads is 50-200Hz.
Under signal receiving modes, the bandwidth after described memory reads is 500-2000Hz.
Described sound input module comprise interconnective sound receiver, first amplifier, the first amplitude amplitude limiter that is connected with described first amplifier and with the level displacement shifter that is connected with described analogue-to-digital converters by a switch S 1, described signal output module comprises the filter that is connected with described digital-analog convertor and the sender unit that is connected with described filter; Described sound receiver receives voice signal and amplifies through first amplifier, voice signal after the amplification is sent to the described first amplitude amplitude limiter and described level displacement shifter carries out filtering minimizing distortion, and filtered voice signal is handled by described filter through described signal processing module and is directed to described sender unit formation signal transfer mode.
Described signal input module also comprises interconnective signal receiver, second amplifier and the second amplitude amplitude limiter, and the described second amplitude amplitude limiter is connected with described level displacement shifter by a mode switch S2; Described voice output module comprises the Audio Players that is connected with one the 3rd amplifier, described signal receiver receives outer signals and delivers to described level displacement shifter minimizing distortion by the described second amplitude amplitude limiter, signal exports described signal processing module to behind described level displacement shifter, export described voice output module to and constitute signal receiving modes after described signal processing module is handled.
Described lifting frequency control unit comprises interconnective latch, with door, or gate resistor R44, R45, R46, R47, capacitor C 21, C22, inverter, diode D5, D6 and switch, under signal transfer mode, described analogue-to-digital converters will be converted to binary logic " 1 " signal and deliver to described latch and described and door respectively by resistance R 44 and R45, described with the door to described memory output signal, described memory resets to the logical zero signal and stores through described latch and cycle rate control circuit described and that door is delivered in the described memory, address in the described memory and enable circuits export described latch to by the replacement terminal reception of described diode D5 latch, the output of described latch becomes logical zero, and through inverter, and resistance R 46, R47, capacitor C 22 and diode D6 to latch and or door on apply the signal of a logical one, a described or R/W input to described memory applies the logical one signal, reads the signal in the described memory.
Described cycle rate control circuit constitutes the CMOS gate oscillator by the NAND gate that is connected, potentiometer, switch, resistance R 24, R39, R40, R43 and capacitor C 20, described CMOS gate oscillator receives the signal from described memory and described lifting frequency control unit, when logical one is delivered to resistance R 43, switch disconnects, and described potentiometer sends the higher-order of oscillation; When logical one is delivered to resistance R 42, Closing Switch, electric current is by resistance R 41, and described potentiometer sends the higher-order of oscillation, imports described memory and described analogue-to-digital converters respectively after two kinds of higher-orders of oscillation reduce frequency by divider.
Described address comprises NAND gate, counter, decoder and the LED lamp string that is connected with enable circuits, and described decoder is connected with described Audio Players, and described counter is connected with described memory.
Adopt low frequency wireless two-way that the utility model provides thoroughly the beneficial effect that brings of communication device be: solved under mine or imflammable gas exists under the environment, realized speech communication with lower firm power, realized two-way voice-and-data communication, time of delay is short, the emergency communication when being applicable to the disaster relief, rescue fully; Realize the wireless communication that penetrates barrier in non-visual range, can satisfy domestic most colliery and non-coal mine practical application; Solved at the catastrophe environment, do not possessed under the situation of supply of electric power, device carry back-up source can assurance device in a long time can operate as normal; Equipment is equipped with the antenna gross weight in 10kg, total length is in 130 meters, possess fully in feasibility aboveground, that the down-hole individual soldier disposes, and this antenna can substitute with common two core copper cash, easy to connect, and in the middle of the use, antenna current is enough little, has avoided energy to cause the blast of imflammable gas greatly.
Description of drawings
Fig. 1 is fundamental diagram of the present utility model.
Fig. 2 is the circuit diagram of lifting frequency control unit in the utility model.
Fig. 3 is the circuit diagram of cycle rate control circuit in the utility model.
Fig. 4 is the circuit diagram of address and enable circuits in the utility model.
Fig. 5 is the circuit diagram of memory in the utility model.
Fig. 6 is the circuit block diagram of microphone in the utility model, amplifier amplitude amplitude limiter and band pass filter.
Fig. 7 is the circuit block diagram of analogue-to-digital converters in the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description:
Extremely shown in Figure 7 as Fig. 1, a kind of low frequency wireless two-way that provides according to the utility model is the embodiment of communication device thoroughly, comprise the sound input module 1, voice output module 2, signal processing module 3, signal input module 4 and the signal output module 5 that are connected, described signal processing module 3 comprises lifting frequency control unit 17, and the voice signal that described sound input module 1 receives imports described signal output module 5 into and constitutes signal transfer mode after described lifting frequency control unit 17 frequency reducings; The signal that described signal input module 4 receives imports described voice output module 2 into and constitutes signal receiving modes behind described lifting frequency control unit 17 raising frequencies.Setting by said structure, make the described low frequency wireless two-way of the utility model embodiment thoroughly communication device allow to realize the signal transmission with less input power, and this device can be realized operate as normal at the 12V direct voltage, the power required owing to this device is very low, and possess flameproof enclosure, therefore can Secure Application in the zone of mine and other power limited; When this device is in signal transfer mode following time, by the lifting frequency control unit the extraneous voice signal that the sound input module receives is realized frequency reducing, make the voice signal that exports signal output module to become more slow, compare with this information original length, transmission used time interval of signal is longer; When this device is in signal receiving modes, the input signal at a slow speed that signal input module receives is realized raising frequency by the lifting frequency control module, before signal is play by loud speaker, it is recovered original length.
As everyone knows, at underground mine, in the environment such as industrial structure and commercial mansion, because high-frequency is subjected to stopping of medium or barrier or limits causing serious decay, signal can not transmit thoroughly.In the utility model, by the lifting frequency control unit signal that receives is carried out transmitting after raising frequency/frequency reducing, realized two-way voice-and-data communication with lower firm power.
Referring to Fig. 1, the low frequency wireless two-way that provides according to the utility model is communication device thoroughly, described signal processing module 3 also comprises analogue-to-digital converters 15, digital-analog convertor 18 and memory 16, under signal transfer mode, the voice signal that described analogue-to-digital converters 15 receive described sound input module 1 is sent into described memory 16 and is stored after sampling, quantification, described lifting frequency control unit 17 converts analog signal to by described digital-analog convertor 18 and exports described signal output module 5 to by reducing the reading rate of described memory 16; Under signal receiving modes, the signal that described analogue-to-digital converters 15 receive described signal input module 4 is sent into described memory 16 and is stored after sampling, quantification, described lifting frequency control unit 17 converts analog signal to by described digital-analog convertor 18 and exports described voice output module 2 to by improving the reading rate of described memory 34.In the utility model, the size of required memory 16 can be determined according to factors such as pending message length, the sampling rate of choosing, quantization levels, can calculate according to following formula:
Memory bits number=sample rate * message length * log(# quantization level)/0.301, therefore, for given memory size and given quantization level, the product of sample rate and message length is a definite value.
Scheme according to the utility model record can learn that under signal transfer mode, when the sample rate of memory 34 was 5500 sample per seconds, effect was fine.Binary digit is admitted to memory 34 and stores, and reads out with slower speed afterwards.Preferably, reading rate is 1/10th of sampling rate, that is, be the situation of 5500 sample per seconds for sample rate, the reading rate suggestion is 550, i.e. high input is low reads; Under signal receiving modes, it is the signal of 550 sample per seconds that signal input module generates sample rate, this signal is converted into binary digit deposits described memory storage in, being higher than sample rate with reading rate afterwards reads out, preferably, reading rate is ten times of sampling rate, when namely sample rate being 550 sample per seconds, the reading rate of memory is 5500 sample per seconds, and namely low input height reads.
In embodiment of the present utility model, installed the memory of 73,728 bits, be quantified as eight level.The sample rate of this moment and the product of message length are a definite value: 24,576.When sample rate was 5500 sample per seconds, this installs treatable maximum information length was 4.47 seconds, but will change the maximum length of process information, can regulate sample rate.Certainly, this adjusting also has certain restriction, and sample rate is more high, and information transmit-receive is just more clear.Processing reaches 6 seconds information if desired, and sample rate is 4096 sample per seconds; Processing reaches 5 seconds information if desired, and sample rate is 4915 sample per seconds; Processing reaches 3.5 seconds information if desired, and sample rate is 7022 sample per seconds.
Referring to Fig. 1, the low frequency wireless two-way that provides according to the utility model is communication device thoroughly, described sound input module 1 comprise interconnective sound receiver 10, first amplifier 11, the first amplitude amplitude limiter 12 that is connected with described first amplifier 11 and with the level displacement shifter 14 that is connected with described analogue-to-digital converters 15 by a switch S 1, described signal output module 5 comprises the filter 72 that is connected with described digital-analog convertor 18 and the sender unit 20 that is connected with described filter 72; Described sound receiver 10 receives voice signal and amplifies through first amplifier 11, voice signal after the amplification is sent to the described first amplitude amplitude limiter 12 and described level displacement shifter 14 carries out filtering minimizing distortion, and filtered voice signal is handled by described filter 72 through described signal processing module 3 and is directed to described sender unit 20 formation signal transfer modes.In the signal transfer mode described in the utility model, sound receiver 10 adopts microphone as signal input device, voice signal amplifies through first amplifier, signal is sent to the first amplitude amplitude limiter 12 to reduce distortion, through being installed in the band pass filter on the described first amplitude amplitude limiter 12, band pass filter described in the utility model not only can be installed on the described first amplitude amplitude limiter 12 as an element separately, also band pass filter can be built in the first amplitude amplitude limiter 12, and the utility model is the band pass filter that adopts 500-2000Hz, carry out filtering at the first amplitude amplitude limiter 12 and band pass filter, to obtain being positioned at the bandwidth of 500Hz-2000Hz scope after the noise reduction process, filtering, bandwidth after the noise reduction process is preferably 1500Hz, this bandwidth can be transmitted by lower available horsepower or firm power, above-mentioned bandwidth still can't or allow in available horsepower to transmit under the limited condition of power, therefore with the information storage in this bandwidth range in memory, by lifting frequency control unit control storage to read out from this memory 16 than low rate, preferably reduce by 10 times, will obtain being positioned at the low frequency signal of 150Hz bandwidth like this.
In order to eliminate low-frequency noise, the utility model also is provided with filter 72, this filter is modulator and the filter that is connected, this low frequency signal is modulated to a certain carrier frequency, for example 2000 hertz, adopt the balanced modulator of suppressed carrier frequency, can obtain a lower sideband of frequency between 1800 hertz and 1950 hertz, and the higher sideband of frequency between 2050 hertz and 2200 hertz.Only transmit a sideband.Therefore, only transmit between 2050 hertz and 2200 hertz bandwidth and be 150 hertz sideband, this scope is the most suitable to be transmitted by lithosphere.In the utility model, signal output module is a transmitting antenna, and also can adopt other reflector is that device transmission provides acoustical signal.
Referring to Fig. 1, the low frequency wireless two-way that provides according to the utility model is communication device thoroughly, described signal input module 4 also comprises interconnective signal receiver 25, the second amplifier 25a and the second amplitude amplitude limiter 26, one demodulator 70 also has been installed on the second amplitude amplitude limiter 26, and the described second amplitude amplitude limiter 26 is connected with described level displacement shifter 14 by a mode switch S2; Described voice output mould 5 comprises the Audio Players 24 that is connected with one the 3rd amplifier 22, described signal receiver 25 receives outer signals and delivers to described level displacement shifter 14 minimizing distortions by the described second amplitude amplitude limiter 26, signal exports described signal processing module 3 to behind described level displacement shifter 14, export described voice output module 5 to and constitute signal receiving modes after described signal processing module 3 is handled.In the utility model, signal receiver 25 is that reception antenna is as signal receiver, Audio Players 24 is that loud speaker is as audio output device, reception antenna receives the signal that imports into, be to export the second amplitude amplitude limiter 26 or optional demodulator to behind the optional amplifier amplifying signal by the second amplifier 25a, signal is by demodulation, enter memory, and read out with higher rate, namely obtain being positioned at the bandwidth of 500Hz-2000Hz scope, bandwidth after filtering, the noise reduction process is preferably 1500Hz, and amplification is also passed through loud speaker, has reappeared original voice messaging.
Referring to Fig. 1, among the embodiment that the utility model provides, also have a standby mode, under standby mode, switch S 4, S5 and S8 or switch S 4, S6 and S7 closure, other switch all disconnects, and directly reception antenna is linked to each other with loud speaker.When this device adopted this connected mode, in case receive signal, the operator can hear voice signal.
Referring to Fig. 2, the low frequency wireless two-way that provides according to the utility model is communication device thoroughly, described lifting frequency control unit 17 comprises interconnective latch 202,207, with door 203,214,215, or door 203 resistance R 44, R45, R46, R47, capacitor C 21, C22, inverter 204,205,206, diode D5, D6 and switch 201, under signal transfer mode, switch 201 closures, described analogue-to-digital converters will be converted to binary logic " 1 " signal and deliver to described latch 202 and described and door 203 respectively by resistance R 44 and R45, described and door are 203 to described memory output signal, described memory resets to the logical zero signal and stores through described latch 202 and cycle rate control circuit described and that door 214 is delivered in the described memory, address in the described memory and enable circuits export described latch 202 to by the replacement terminal reception of described diode D5 latch 207 and 202, the output of described latch 202 becomes logical zero, and through inverter 204,205,206, and resistance R 46, R47, capacitor C 22 and diode D6 to latch 207 and or door 203 on apply the signal of a logical one, guarantee that this signal that applies only has temporary, described or the door 203 R/W inputs to described memory apply the logical one signal, thereby information is read out from memory and are transmitted.Owing to applied a logical zero signal on the speed control circuit in the described memory, made this information to read with low rate 550Hz.
Referring to Fig. 2, under signal receiving modes, switch 208 closures, its operation logic and signal transfer mode are basic identical, only are with latch 202,207, resistance R 44, R45, R46, R47, capacitor C 21, C22 replace to latch 208,211, resistance R 48, R49, R50, R51, capacitor C 23, C24 and diode D7.Command signal is also passed through or door 212 transmission.Because under signal receiving modes, do not have signal to be applied at first or door 214 on, therefore logical zero signal of 214 outputs makes memory circulate with low rate.The signal of latch 209 outputs makes mode switch S2 closure through tie point 68, imports it into memory thereby obtain input signal.After information entered memory, the address in the described memory and enable circuits sent " circulation an is finished " signal to latch 209 and 211.Like this, latch 211 can make memory circulate with two-forty to applying a logical one signal with door 214.Identical signal also is applied on the door 215, sends reading order to memory.
Referring to Fig. 3, the low frequency wireless two-way that provides according to the utility model is communication device thoroughly, described cycle rate control circuit is by the NAND gate 131 that is connected, potentiometer 132,133, switch 112,113, resistance R 24, R39, R40, R43 and capacitor C 20 constitute the CMOS gate oscillator, capacitor C 20 and resistance R 39 have determined the frequency of oscillation of described CMOS gate oscillator, described CMOS gate oscillator is by terminal 96 and 95 signals that receive from described memory and described lifting frequency control unit, when logical one is delivered to resistance R 43, switch 112 disconnects, described potentiometer sends the higher-order of oscillation, and the described higher-order of oscillation is the signal that above-mentioned bandwidth is 500Hz-2000Hz; When logical one is delivered to resistance R 42, Closing Switch 113, electric current is by resistance R 41, described potentiometer sends the higher-order of oscillation, imports described memory and described analogue-to-digital converters respectively after two kinds of higher-orders of oscillation reduce frequency by divider 130, preferably reduces by 10 times, two frequency reducing signals are through resistance R 35, R36, capacitor C 19, inverter 81, terminal 94, deliver to analog-digital converter, and through resistance R 37, R38, capacitor C 18, inverter 82, terminal 90, deliver to memory.The frequency that these two signals reduce differs a clock cycle.
Referring to Fig. 4, the low frequency wireless two-way that provides according to the utility model is communication device thoroughly, described address and enable circuits comprise the NAND gate that is connected (131,131a, 135), counter (132), decoder (134) and LED lamp string (136), described decoder (134) is connected with described Audio Players, and described counter (132) is connected with described memory.Signal from analogue-to-digital converters enters described address and enable circuits from terminal 90 through NAND gate 131a and terminal 94.Signal from terminal 94 enters NAND gate 131, is sent to binary counter 132.Binary channels input nand gate 135 is connected binary counter 132 with counter decoder 134.By No. six inverters 137 and resistance R 58, LED lamp string 136 links to each other with counter decoder 134.According to the treatable maximum information duration of the utility model, LED lamp string 136 will light successively every the sixth of total duration, thereby realizes clocking capability.Counter decoder 134 also links to each other with storage chip by dual input NAND circuit 131 at terminal 191 to 196.At last, counter decoder 134 links to each other with modulator or loud speaker at 301 tie points.After circulation was finished, the output of decoder 134 was restarted counting through inverter 131b.This signal also transfers to described lifting frequency control unit and speaker amplifier through terminal 97.
Referring to Fig. 5, thoroughly in the communication device, memory is made up of a series of storage chips 140 at low frequency wireless two-way that the utility model provides, and triplets amount to 24K * 3 memory space, referring to Fig. 7.Though the utility model preferentially adopts semiconductor memory chip, also can use the magnetic bubble memory technology certainly.Chipset terminal 191 to 196 is connected with enable circuits with address in the described memory.Chipset also links to each other with described analogue-to-digital converters through terminal 91,92,93, links to each other with described digital-analog convertor through terminal 197,198,199. Storage chip 140a, 140b, 140c form one group, and storage chip 140d, 140e, 140f form second group, by that analogy.Memory by the bundle 190 the visit, by terminal 191-196 by the signal enabling from the address in the described memory and enable circuits.Data A*, B* and C* from described analog-digital converter enter through terminal 91,92,93 respectively.Memory output data QA, QB, QC deliver to described digital-analog convertor through terminal 197,198 and 199.Described lifting frequency control unit links to each other at terminal 200 with described memory, and when being logical one according to the result of lifting frequency control unit: R/W, memory reads information; When R/W was logical zero, memory write information.
Referring to Fig. 6, in the utility model, the amplifier of installing, filter and amplitude amplitude limiter are a cover 3 grades of amplifiers, filter and amplitude amplitude limiters, as shown in Figure 3.Microphone 60 generates input signal.Input signal further passes through the network filtering that element R8, R9, R10, C6 and C7 form by resistance R 5, R6, R7, capacitor C 4 and C5 filtering.Capacitor C 8, resistance R 11, R12 realize amplifier 61 and amplifier 62 direct bias currents.Signal is coupled to amplifier 62 by element C9, R13, R14.Amplifier 62 is finished further amplification and filtering with peripheral element R15, R16, R17, R18, R19, C10, C11 and C12.Amplitude is by diode D1, D2, D3 and D4 restriction and setting.Signal is coupled to third level amplifier 63 by switch S 1 and the resistance R 20 that is attached thereto.Operational amplifier 63 is by element R22, R23 and C16 biasing, with peripheral element R21, R24, C13 and C15 together, further signal is amplified and filtering.Under transmission mode, switch S 1 closure; And under receiving mode, switch S 1 disconnects.Switch S 2 is also passed through terminal 68 with related resistors R25, is subjected to the control from the signal of control circuit.Under transmission mode, switch S 2 closures; And under receiving mode, switch S 2 disconnects.Switch S 7 is connected with S2 with S8, leads to demodulator 70 or amplitude amplitude limiter 26 via switch S 8 and S9.
As shown in Figure 7, analog signal is delivered to comparator 80 and related resistors R26, R27 and R28 at terminal 69.In compare cycle, ascending order counter 83 begins upwards to count from 0.From 83 output digital signals through resistance R 29 to R32, convert analog signal to.This analog signal and input signal are compared.If this signal is lower than input signal, then ascending order counter 83 continues counting.When the output signal that becomes when numeral to analog-converted had just surpassed analog input signal, the output of comparator 80 became " 0 ".This signal is delivered to the oscillator of being made up of NAND gate 85 and 86, capacitor C17, resistor R33 and R34, through inverter 81 to trigger 82.Counter 83 is delivered in the output of oscillator and trigger 82, and counting stops.Count results, is transferred in the circuit of memory 16 through terminal 91,92,93 according to the signal of delivering to memory 84 clock terminals 91 from memory cycle speed control circuit by latch 84 lockings.When (binary one 11), NAND gate 87 also can make counter stop when output reaches maximum.Counter 83 and trigger 82 are reset according to reset signal, and reset signal is controlled from the cycle rate in the described memory through terminal 90.
The utility model also provides a kind of low frequency wireless two-way embodiment of the means of communication thoroughly, may further comprise the steps: (1), sound/signal input module receives extraneous information, the signal of default amplitude is amplified, obtained after filtering and the noise reduction process to the information that receives, export signal processing module to; (2), signal processing module is sampled, is quantified as digital signal to signal and is stored in the signal storage device, digital signal reads out the digital signal in the signal storage device with the reading rate that is below or above default sampling rate by the lifting frequency control unit, generates follow-up analog signal for transmission; (3), signal/voice output module receives analog signal and is directed to modulator or filter to provide acoustical signal, determines that information transmits.The means of communication that provide by above-described embodiment, solved under mine or imflammable gas exists under the environment, realized speech communication with lower firm power, realized two-way voice-and-data communication, time of delay is short, the emergency communication when being applicable to the disaster relief, rescue fully; Realize the wireless communication that penetrates barrier in non-visual range, can satisfy domestic most colliery and non-coal mine practical application; Solved at the catastrophe environment, do not possessed under the situation of supply of electric power, device carry back-up source can assurance device in a long time can operate as normal.
The low frequency wireless two-way that provides according to the utility model is the means of communication thoroughly, under signal transfer mode, microphone in the sound input module 1 receives extraneous voice messaging, amplify by first amplifier 11 and 12 pairs of voice messagings of the first amplitude amplitude limiter, filtering and noise reduction process, at the first amplitude amplitude limiter, 12 built-in band pass filters, described first amplifier 11, band pass filter and level displacement shifter 14 will be just, the negative wave signal is handled, make it all to become positive wave, described band pass filter adopts the band pass filter of 500-2000 hertz, obtain the signal of default amplitude, export signal processing module to;
3 pairs of signals of signal processing module are sampled, are quantified as digital signal and are stored in the signal storage device, digital signal reads out the digital signal in the signal storage device with the reading rate that is lower than default sampling rate by lifting frequency control unit 17, generates follow-up analog signal for transmission;
Sender unit in the signal output module 5, transmitting antenna for example receives analog signal after signal processing module 3 is handled and is directed to modulator or filter to provide acoustical signal, determines that information transmits.
The low frequency wireless two-way that provides according to the utility model is the means of communication thoroughly, under signal receiving modes, reception antenna in the signal input module 1 receives extraneous analog signal by electromagnetic induction, by amplifier and amplitude amplitude limiter to analog signal amplify, filtering and noise reduction process, obtain the signal of default amplitude, export signal processing module to;
14 pairs of described signals that obtain of analogue-to-digital converters 15 in the signal processing module 3 and level displacement shifter are sampled, are quantified as digital signal and are stored in the signal storage device, digital signal reads out the digital signal in the signal storage device with the reading rate that is higher than default sampling rate by lifting frequency control unit 17, generates follow-up analog signal for transmission;
Audio Players in the voice output module 2, loud speaker for example receives and plays back to provide acoustical signal after analog signal is amplified by amplifier, determines that information transmits.
Claims (9)
1. low frequency wireless two-way communication device thoroughly, comprise the sound input module, voice output module, signal processing module, signal input module and the signal output module that are connected, it is characterized in that: described signal processing module comprises the lifting frequency control unit, and the voice signal that described sound input module receives imports described signal output module into and constitutes signal transfer mode after the frequency reducing of described lifting frequency control unit; The signal that described signal input module receives imports described voice output module into and constitutes signal receiving modes behind described lifting frequency control unit raising frequency.
2. low frequency wireless two-way as claimed in claim 1 communication device thoroughly, it is characterized in that: described signal processing module also comprises analogue-to-digital converters, digital-analog convertor and memory, under signal transfer mode, described analogue-to-digital converters are sent into described memory storage with the voice signal that described sound input module receives after sampling, quantification, described lifting frequency control unit converts analog signal to by described digital-analog convertor and exports described signal output module to by reducing the reading rate of described memory; Under signal receiving modes, described analogue-to-digital converters are sent into described memory storage with the signal that described signal input module receives after sampling, quantification, described lifting frequency control unit converts analog signal to by described digital-analog convertor and exports described voice output module to by improving the reading rate of described memory.
3. low frequency wireless two-way as claimed in claim 2 communication device thoroughly, it is characterized in that: under signal transfer mode, the bandwidth after described memory reads is 50-200Hz.
4. low frequency wireless two-way as claimed in claim 2 communication device thoroughly, it is characterized in that: under signal receiving modes, the bandwidth after described memory reads is 500-2000Hz.
5. low frequency wireless two-way as claimed in claim 2 communication device thoroughly, it is characterized in that: described sound input module comprise interconnective sound receiver, first amplifier, the first amplitude amplitude limiter that is connected with described first amplifier and with the level displacement shifter that is connected with described analogue-to-digital converters by a switch S 1, described signal output module comprises the filter that is connected with described digital-analog convertor and the sender unit that is connected with described filter; Described sound receiver receives voice signal and amplifies through first amplifier, voice signal after the amplification is sent to the described first amplitude amplitude limiter and described level displacement shifter carries out filtering minimizing distortion, and filtered voice signal is handled by described filter through described signal processing module and is directed to described sender unit formation signal transfer mode.
6. low frequency wireless two-way as claimed in claim 2 communication device thoroughly, it is characterized in that: described signal input module also comprises interconnective signal receiver, second amplifier and the second amplitude amplitude limiter, and the described second amplitude amplitude limiter is connected with described level displacement shifter by a mode switch S2; Described voice output module comprises the Audio Players that is connected with one the 3rd amplifier, described signal receiver receives outer signals and delivers to described level displacement shifter minimizing distortion by the described second amplitude amplitude limiter, signal exports described signal processing module to behind described level displacement shifter, export described voice output module to and constitute signal receiving modes after described signal processing module is handled.
7. low frequency wireless two-way as claimed in claim 2 communication device thoroughly, it is characterized in that: described lifting frequency control unit comprises interconnective latch (202,207), with door (203,214,215), or door (203) resistance R 44, R45, R46, R47, capacitor C 21, C22, inverter (204,205,206), diode D5, D6 and switch (201), under signal transfer mode, described analogue-to-digital converters will be converted to binary logic " 1 " signal and deliver to described latch (202) and described and door (203) respectively by resistance R 44 and R45, described with the door (203) to described memory output signal, described memory resets to the logical zero signal and stores through described latch (202) and cycle rate control circuit described and that door (214) is delivered in the described memory, address in the described memory and enable circuits are by described diode D5 latch (207,202) replacement terminal receives and exports described latch (202) to, the output of described latch (202) becomes logical zero, and through inverter (204,205,206), and resistance R 46, R47, capacitor C 22 and diode D6 to latch (207) and or door apply the signal of a logical one on (203), described or door (203) applies the logical one signal to the R/W input of described memory, reads the signal in the described memory.
8. low frequency wireless two-way as claimed in claim 7 communication device thoroughly, it is characterized in that: described cycle rate control circuit constitutes the CMOS gate oscillator by the NAND gate that is connected (131), potentiometer (132,133), switch (112,113), resistance R 24, R39, R40, R43 and capacitor C 20, described CMOS gate oscillator receives the signal from described memory and described lifting frequency control unit, when logical one is delivered to resistance R 43, switch (112) disconnects, and described potentiometer sends the higher-order of oscillation; When logical one is delivered to resistance R 42, Closing Switch (113), electric current is by resistance R 41, and described potentiometer sends the higher-order of oscillation, imports described memory and described analogue-to-digital converters respectively after two kinds of higher-orders of oscillation reduce frequency by divider (130).
9. low frequency wireless two-way as claimed in claim 7 communication device thoroughly, it is characterized in that: described address and enable circuits comprise the NAND gate that is connected (131,131a, 135), counter (132), decoder (134) and LED lamp string (136), described decoder (134) is connected with described Audio Players, and described counter (132) is connected with described memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202141927U CN203166901U (en) | 2013-04-24 | 2013-04-24 | Low-frequency wireless bidirectional through-the-ground communication apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202141927U CN203166901U (en) | 2013-04-24 | 2013-04-24 | Low-frequency wireless bidirectional through-the-ground communication apparatus |
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| CN203166901U true CN203166901U (en) | 2013-08-28 |
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| CN2013202141927U Withdrawn - After Issue CN203166901U (en) | 2013-04-24 | 2013-04-24 | Low-frequency wireless bidirectional through-the-ground communication apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103220010A (en) * | 2013-04-24 | 2013-07-24 | 北京中税天网科技有限公司 | Low-frequent wireless bidirectional ground penetrating communication device and method thereof |
| CN114128036A (en) * | 2019-05-28 | 2022-03-01 | 莫戈公司 | Stepped frequency response non-contact slip ring probe |
-
2013
- 2013-04-24 CN CN2013202141927U patent/CN203166901U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103220010A (en) * | 2013-04-24 | 2013-07-24 | 北京中税天网科技有限公司 | Low-frequent wireless bidirectional ground penetrating communication device and method thereof |
| CN114128036A (en) * | 2019-05-28 | 2022-03-01 | 莫戈公司 | Stepped frequency response non-contact slip ring probe |
| CN114128036B (en) * | 2019-05-28 | 2023-06-09 | 莫戈公司 | Graded Frequency Response Non-Contact Slip Ring Probe |
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