CN201352258Y - GNSS monitoring device and clock module - Google Patents
GNSS monitoring device and clock module Download PDFInfo
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- CN201352258Y CN201352258Y CNU2008201234694U CN200820123469U CN201352258Y CN 201352258 Y CN201352258 Y CN 201352258Y CN U2008201234694 U CNU2008201234694 U CN U2008201234694U CN 200820123469 U CN200820123469 U CN 200820123469U CN 201352258 Y CN201352258 Y CN 201352258Y
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- gnss
- clock
- monitoring device
- receiving element
- integrated circuit
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Abstract
The utility model discloses a GNSS monitoring device and a clock module, belonging to the field of monitoring. The GNSS monitoring device comprises a GNSS receiver unit, a communication control unit, a power supply unit and a radio unit, wherein the communication control unit comprises a micro-computer part, a clock part, a memory card, and the clock part comprises a clock integrated circuit which works uninterruptedly to correct the internal time according to the GNSS receiver unit; the power supply unit comprises a solar panel and storage batteries, and the radio unit comprises a wireless antenna part and a wireless transceiver. The clock module comprises a clock integrated circuit, and the clock module is positioned in the GNSS monitoring device and is connected with a register in the GNSS monitoring device; and the clock integrated circuit works uninterruptedly to correct the internal time according to the GNSS receiver unit in the GNSS monitoring device. The utility model can improve the processing speed of information of the GNSS receiver exploring, capturing and tailgating satellites and the like.
Description
Technical field
The utility model relates to the monitoring field, particularly a kind of GNSS monitoring device and clock module.
Background technology
Utilize GNSS (global positioning satellite) monitoring device that target is monitored, general GNSS receiver module is by exploring, catch, knock into the back the GNSS satellite, reception from the GNSS satellite to monitoring objective position-detection information, the GNSS receiver module will be handled by information such as softwares according to the position-detection information of collecting; Yet, because the position-detection information of this processing institute foundation of GNSS receiver module as orbit information, all is dynamic, be not what fix, so cause the time of informational needs more than 10 minutes of the satellite of receiver module reception sometimes.
The orbit information that the GNSS receiver module obtains all is necessary to the information processing of back; By utilizing the orbit information that obtains, carry out location and calculate, thereby obtain location result of calculation.Location result of calculation can only be judged roughly time information accurately, and along with the continuous work of GNSS receiver, the deviation of temperature compensating crystal oscillator (TCXO oscillator) frequency can obtain revisal at leisure, and the correctness of time information just is improved at leisure.
In order to improve the precision of location, the GNSS receiver module will continuous working, time information is managed, yet, be cut off if work as the power supply of GNSS receiver, the temperature of TCXO oscillator just changes, the deviation of TCXO oscillator frequency just can not be by revisal, and the compensating value of TCXO oscillator can not be used, therefore, need restart, and from restart the time be carved into the GNSS receiver module and need the regular hour after stable.
In the information of obtaining relevant GNSS satellite itself, as orbit information etc., utilize the position-detection information of GNSS satellite transmission, the GNSS receiver just can carry out location and calculate, but, inner at the GNSS receiver module not about the information of GNSS satellite itself, like this, at first need obtain the information of relevant GNSS satellite itself; Yet obtaining whole orbit informations needs 12.5 minutes, and words at random need 25 minutes; And during collecting orbit information, the operation of satellitosis can be explored, be caught to the GNSS receiver module simultaneously, and before GNSS receiver module output location result, the device that receives the location result is in waiting status always.
Therefore, in existing GNSS monitoring device, the GNSS receiver module can't be handled fast to the information of satellite, thereby causes the prolongation of message processing time, and corresponding receiver devices can not be utilized fully.
Summary of the invention
In order to improve in the GNSS monitoring system, to the processing speed of satellite information, the utility model provides a kind of object monitoring device and clock module.
In the utility model, monitoring device has carried the integrated circuit of clock (IC) that also can move when power supply stops, because carried clock IC, and when monitoring device disconnects at power supply, by the operation of clock IC, the automatically updated moment.
This clock can cut off the power supply in the process of energising (GPS receiver can correct management constantly), is not very accurate though compare when receiving with the GPS receiver, the environment in moment of also can guaranteeing to provide diurnal inequality in tens of seconds error.Because data are constantly arranged, the exploration of GNSS satellite, pull-in time will be more a lot of than shortening under the situation about not having.
This technical scheme is as follows:
A kind of GNSS monitoring device comprises:
The GNSS receiving element comprises GNSS antenna part and GNSS receiver, is used to receive the signal data of GNSS satellite;
Communication control unit comprises microcomputer portion, clock portion, and storage card is used to control GNSS receiving element, power supply unit and radio unit; Include integrated circuit of clock in the clock portion, the integrated circuit of clock non-stop run, constantly inner according to the correction of GNSS receiving element;
Data processing unit is used to handle the signal data that receives;
Power supply unit comprises solar cell, and accumulator is used to the GNSS monitoring device that power supply is provided;
Radio unit comprises wireless antenna portion and radio receiving-transmitting unit, is used to transmit information between GNSS satellite and the GNSS receiving element.
Wherein, the microcomputer portion in the communication control unit comprises: central processing unit, and ROM (read-only memory), random access memory, register, ROM (read-only memory) is preserved the parameter information of GNSS satellite, register holds time information.
Integrated circuit of clock is specially the quartz oscillation loop.
The integrated circuit of clock non-stop run, constantly inner according to the correction of GNSS receiving element, specifically pass through: start central processing unit, central processing unit monitors the GNSS receiving element, and according to the GNSS receiving element time information in the register in the microcomputer portion is revised, thereby the inside of realizing revising clock portion constantly.
The integrated circuit of clock non-stop run was revised once constantly inner in per 2 hours according to the GNSS receiving element.
A kind of clock module includes integrated circuit of clock;
Clock module is arranged in the GNSS monitoring device, is connected with register in the GNSS monitoring device; The register holds time information;
The integrated circuit of clock non-stop run, constantly inner according to the GNSS receiving element correction in the GNSS monitoring device.
Wherein, the integrated circuit of clock non-stop run was revised once constantly inner in per 2 hours according to the GNSS receiving element.
The integrated circuit of clock non-stop run, constantly inner according to the correction of GNSS receiving element, specifically pass through: start the central processing unit in the GNSS monitoring device, central processing unit monitors the GNSS receiving element, and according to the GNSS receiving element, time information in the register is revised, thus the inside moment of realizing the correction clock module.
By technical scheme in the utility model, can improve the GNSS receiver to the exploration of satellite, catch and the speed of information processing such as knock into the back, improved the work efficiency of GNSS monitoring system greatly.
Description of drawings
Fig. 1 is the synoptic diagram of the GNSS monitoring device that provides among the embodiment;
Fig. 2 is that the PIO_A register-bit that provides among the embodiment is distributed block scheme;
Fig. 3 is that the PIO_B register-bit that provides among the embodiment is distributed block scheme.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model embodiment is described in further detail below in conjunction with accompanying drawing.
Present embodiment provides a kind of GNSS monitoring device.The GNSS monitoring device is made up of communication control unit, power supply unit, GNSS receiving trap, transceiving T unit etc.; In communication control unit, comprise clock portion, voltage control division, power control part, modules such as battery portion;
Fig. 1 is the synoptic diagram of GNSS monitoring device;
Wherein, 1 is the GNSS receiving element, is made of GNSS antenna part and GNSS receiver portion; The GNSS receiving element receives the location signal that sends from artificial satellite, carries out the location computing in the GNSS receiver, again by GNSS receiver output position information, and clock information and moment synchronizing signal;
2 is communication control unit, by central processing unit (CPU) 2a, and ROM (read-only memory) (ROM) 2b, the miniature of random access memory (RAM) 2c use computer department more, clock portion 2d, storage card 2d constitutes; CPU 2a has interruptable controller (INTC), communication port (SIO), general parallel input/output port (PIO), counter basic functions such as (COUNT);
Usually, 2 of communication ports, 3 of 16 digit counters, 4 of 8 bit parallel input/output port.
3 is power supply unit, receive sunshine by day by solar panel 3f and generate electricity, and in the feedway direct supply, be charge in batteries.When in case solar cell can not generate electricity, will be by accumulator feedway direct supply.The direct supply of supplying with can produce the required voltage+VCC of communication control unit 2, and does not disappear for making power switch 3e cut off back RAM 2c content, utilizes lift-launch also to produce voltage+Vback at on-chip battery 3d; Simultaneously, the power source ON of transceiving T unit 4-OFF control and transceiver such as are permitted, forbid at operation;
4 for transceiving letter unit, is made up of wireless antenna portion and radio receiving-transmitting unit.
In communication control unit 2, clock portion 2d is by counter module, and the synchronizing signal administration module constitutes:
Counter module, the accurate synchronization timing when being used to manage the satellite seizure,
The synchronizing signal administration module, the synchronizing signal that is used to manage the output of GNSS receiver.
In order to improve the processing speed of GNSS receiver to satellite information, the GNSS monitoring system in the present embodiment has adopted as lower device:
1, in communication control unit, miniature many CPU IC that adopt with computer department have interruptable controller (INTC), communication port (SIO), general parallel input/output port (PIO), counter basic functions such as (COUNT);
As method for optimizing, 2 of communication ports, 3 of 16 digit counters, 4 of 8 bit parallel input/output port.
2, in the GNSS receiving trap, system is accurately controlled during GNSS passing of satelline GNSS, the synchronizing signal that when sending based on GNSS is.On the one hand, system running when the moment that we utilize is based on UTC, system begins as benchmark in October, 1980 with UTC during this GNSS, according to the revisal of subsequently leap second, is slow 12 seconds during now than UTS.Although time system is different,, the scale of time is identical.
Herein, the GNSS receiver receives the GNSS signal on the ground, has considered the mensuration of position on the ground.
The GNSS satellite is positioned at the position of the about 20000km in ground, the signal of broadcasting from the GNSS satellite on the GNSS receiver crown needs 70ms to arrive receiver (elevation angle is low more, and time of arrival is slow more) approximately.
The GNSS receiver with on the ground of principle is an example, if judge the distance between the antenna of GNSS satellites and GNSS receiver on the ground by 3 GNSS satellites, and the position of ground as can be known then.
Utilize the time to measure distance.To multiply by electromagnetic speed (electromagnetic speed is the light velocity, about 300000km/h) time can try to achieve.
Mark for overlapping GNSS electromagnetic wave signal has expression constantly to begin if GNSS receiver is on the ground correctly found the solution the time of reception of this mark, then can determine the time that arrives the antenna of GNSS receiver from the GNSS satellite to electromagnetic wave.
In addition, if the location precision of the GNSS receiver of going up potentially is 300m, the systematic error in the moment of Di Shang GNSS receiver became for 1 μ second so.That is to say, even in worldwide, allow the occasion of identical GNSS receiver action, whole GNSS receiver can obtain synchronously in the scope at random in 1 μ second.
In fact to have used the location precision of the GNSS receiver of vehicle mounted guidance etc. also be 30m, according to above-mentioned described, has than the better moment precision (meaning that the location precision is higher) that has illustrated.
In order to utilize this moment signal, the output of GNSS receiver is synchronous pulse signal when UTS.The moment synchronizing signal of output in per 1 second is referred to as the 1PPS signal.
Except 1PPS, export the GNSS receiver of signals such as 5PPS, 10PPS, 20PPS in addition.
3, by clock control power supply unit starting, stop;
(1) action of power supply unit:
Power supply 3e is in out (ON) state, and (+DC) input voltage resistance 3h applies+DC input voltage 3h with regard to the energized switch, for power control part direct-flow positive voltage.Power control part one has power control part+DC input voltage 3h, switch oscillation circuit in the power supply control just begins action, produces voltage+Vcc, voltage+Vcc one is stable, the just supply of acceptance+Vcc, the CPU control part begins action, the CPU control part produces a signal that allows cpu reset in the supply of+Vcc, the CPU loop begins action/control according to the program that is recorded among the attached ROM.
Fig. 2 is that block scheme is distributed in PIO_A register (time register) position that provides in the present embodiment;
Position-6 power source ON signal according to CPU output PIO-A register are 1 signal, and position-6 signal is supplied with power switch ON signal to power control part.Supply with power switch ON signal by the power switch loop during startup to power control loop, in case become position-6 signal condition of supplying, even the blackout in power switch loop then, the supply of the signal in the power control loop also continues, as long as+Vcc voltage produces the loop, do not stop to move the condition that has just possessed continuous action.In addition, based on+DC input voltage 3h, accumulator 3g is recharged.Accumulator 3g will provide necessary power supply to whole device by this accumulator 3g when+situation that DC input voltage 3h does not resupply.
More than be the explanation of right+DC input signal, the principle of work of solar panel 3f is consistent with the course of work of above-mentioned+DC input signal.
(2) GNSS receiver portion is driven by+Vback:
In order to make the continuous action of GNSS receiver, the GNSS acceptance division is controlled power supply by battery+Vback, as long as battery+Vback supply power, the GNSS receiver just can perseveration.
(3) clock portion also can be moved even without+Vcc:
Clock portion also can be kept action even without+Vcc voltage, and clock portion is also by+Vback power supply power supply.
(4) specifying the scheme of power supply+Vcc startup constantly:
Fig. 3 is that block scheme is distributed in PIO_B register (time register) position that provides in the present embodiment;
Because clock portion and GNSS receiver are driven by power supply+back, for based on the time output signal of clock portion appointment, utilize the warning of clock portion that function is set in advance, position-0, position-1, position-2, position-3 by the PIO-B register is provided with the alerting signal output time in clock portion;
In addition, position the-the 0th, the signal that permission clock IC operates from the outside; Position the-the 1st, the continuous data of reading from clock IC is by the bit port of CPU receiving register; Position the-the 2nd, the transmission continuous data bit port when clock IC is added data, for clock IC being read and add continuous data, position-3 signal output pulse signals make continuous data and this signal Synchronization, read and add.
For the switch oscillation circuit in the power supply control after the power control part adding alerting signal is just started working generation+Vcc voltage.+ Vcc voltage one is stable, and just supply, the CPU control part of acceptance+Vcc begin action.The CPU control part produces a signal that allows cpu reset in the supply of+Vcc, the CPU loop begins action/control according to the program that is recorded among the attached ROM.Position-6 power source ON signal according to CPU output PIO-A register are 1 signal, power source ON signal are supplied with to power control part.Supply with power source ON signal by alerting signal during startup to power control loop, in case become the power source ON signal condition of supplying, even then alerting signal disappears, the supply of the power source ON signal in the power control loop also continues, as long as+Vcc voltage produces the loop and do not stop to move the condition that has just possessed continuous action.
(5) scheme in the moment in the management loop:
The location that can set the GNSS receiver according to CPU constantly when 1 time on the 1st GNSS is in the location state, is revised time register in the clock portion at up-to-date location constantly.Even the inside time register in the clock portion also can be correctly kept in this correction for 1 time on the 1st.
(6) in specifying constantly+the Vcc power supply stops scheme:
In order to stop power supply, according to the indication of the software of CPU,, then keep the blackout of power control loop action if indication stops the power source ON signal of the position-6 of PIO-A register, the switch oscillation circuit in the power control part stops to move, and+Vcc voltage stops.
Having constituted like this to produce and kept the signal that action takes place voltage based on the power supply unit enabling signal with according to CPU action, power supply unit produces/stops+scheme of Vcc voltage.
Also have, before the power supply that cuts off control part, set the up-to-date GNSS location moment of clock portion, then, power source ON signal is set at " 0 ", and power source ON signal is stopped.
4. accurately manage scheme constantly;
Clock portion itself has the quartz oscillation loop, manages constantly according to the frequency number that oscillation circuit produces.For this reason, the quartz (controlled) oscillator of the moment precision dependence itself in the clock portion.For this reason, the moment precision of clock portion keeps the moment managerial ability of the target of determining start-up time all the time.
For this reason, be equipped with the GNSS receiver, utilize counter in the CPU based on the 1 second SIGNALS MANAGEMENT clock constantly with GNSS receiver output, design is as the clock in the basic moment in the control part.
The precision of 1 pulse per second (PPS) of GNSS receiver output and the time difference of UTC reaches 100ns, and counter can constitute the clock of correct timing in 1 second.
5. clock IC (integrated circuit) scheme of proofreading and correct;
GNSS receiver after the startup is in the location state of the exploration of carrying out satellite/catch/knock into the back.Though this time is relevant with the acquisition time of the orbit information of GNSS receiver, knock into the back/the location state but arrived after 4 minutes at the latest in about 2 minutes, the NSS receiver is ready, meanwhile, start the CPU of communication control unit, CPU monitors the receiving mode of GNSS receiver, explores/catches when satellite one becomes/knock into the back/state of location, and the precision in the moment of GNSS receiver output just reaches tens of nanoseconds.The GNSS receiver arrived behind the location state according to the moment based on the CPU software set clock IC in the present correct moment of clock IC.Clock IC proofreaies and correct GNSS constantly when the GNSS receiver arrives the location state.Like this, in the extremely correct moment of control expression, the moment that this extreme is correct is based on the moment of the GNSS of clock IC correction.Also have, in the occasion of running continuously because GNSS receiver start-up mode and location mode switch all more than once, so CPU the GNSS receiver continuously the occasion of running just carried out the correction of clock IC every 2 hours.
By the technical scheme in the present embodiment, the GNSS receiver knocks into the back, catches the GNSS satellite, obtains up-to-date orbit information, uses location is calculated necessary up-to-date information to carry out location and calculate location result of calculation.The location result is once coming out to judge the ballpark moment, and the difference of the frequency number of the TCXO oscillator that self is always using along with continuous running obtains revisal at leisure then, thereby correctness constantly is improved at leisure.
Present embodiment shortened the GNSS receiver to the exploration of satellite, catch, knock into the back the employed time, improved the speed of information processing, improved the work efficiency of GNSS monitoring system greatly.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1, a kind of GNSS monitoring device is characterized in that, described device comprises:
Be used to receive the GNSS receiving element of the signal data of GNSS satellite, comprise GNS8 antenna part and GNSS receiver;
Be used to control the communication control unit of described GNSS receiving element, power supply unit and radio unit, comprise microcomputer portion, clock portion, storage card; Include integrated circuit of clock in the described clock portion, described integrated circuit of clock non-stop run, constantly inner according to described GNSS receiving element correction;
Be used to handle the data processing unit of the signal data that receives;
Be used to the GNSS monitoring device that the power supply unit of power supply is provided, comprise solar cell, accumulator;
Be used to transmit the radio unit of information between GNSS satellite and the described GNSS receiving element, comprise wireless antenna portion and radio receiving-transmitting unit.
2, GNSS monitoring device according to claim 1, it is characterized in that the microcomputer portion in the described communication control unit comprises: central processing unit, the ROM (read-only memory) of preserving the parameter information of GNSS satellite, random access memory, the register of preservation time information.
3, GNSS monitoring device according to claim 1 is characterized in that, described integrated circuit of clock is specially the quartz oscillation loop.
4, according to each described GNSS monitoring device among the claim 1-3, it is characterized in that, described integrated circuit of clock non-stop run, constantly inner according to described GNSS receiving element correction, specifically pass through: start described central processing unit, described central processing unit monitors described GNSS receiving element, and according to described GNSS receiving element the time information in the register in the described microcomputer portion is revised, thereby the inside of realizing revising clock portion constantly.
According to each described GNSS monitoring device among the claim 1-3, it is characterized in that 5, the described integrated circuit of clock of non-stop run was revised once constantly inner in per 2 hours according to described GNSS receiving element.
6, a kind of clock module is characterized in that, includes integrated circuit of clock in the described clock module;
Described clock module is arranged in the GNSS monitoring device, is connected with register in the described GNSS monitoring device; Described register holds time information;
Described integrated circuit of clock non-stop run, constantly inner according to the GNSS receiving element correction in the described GNSS monitoring device.
7, clock module according to claim 6 is characterized in that, the described integrated circuit of clock of non-stop run was revised once constantly inner in per 2 hours according to described GNSS receiving element.
8, according to each described clock module in claim 6 or 7, it is characterized in that, the described integrated circuit of clock of non-stop run is constantly inner according to described GNSS receiving element correction, specifically pass through: start the central processing unit in the described GNSS monitoring device, described central processing unit monitors described GNSS receiving element, and, the time information in the described register being revised, thereby the inside moment of realizing the correction clock module according to described GNSS receiving element.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201234694U CN201352258Y (en) | 2008-11-04 | 2008-11-04 | GNSS monitoring device and clock module |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201234694U CN201352258Y (en) | 2008-11-04 | 2008-11-04 | GNSS monitoring device and clock module |
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| CN201352258Y true CN201352258Y (en) | 2009-11-25 |
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| CNU2008201234694U Expired - Fee Related CN201352258Y (en) | 2008-11-04 | 2008-11-04 | GNSS monitoring device and clock module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103365201A (en) * | 2012-03-28 | 2013-10-23 | 华东师范大学 | GNSS navigation satellite-based self-maintenance clock publishing system |
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- 2008-11-04 CN CNU2008201234694U patent/CN201352258Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103365201A (en) * | 2012-03-28 | 2013-10-23 | 华东师范大学 | GNSS navigation satellite-based self-maintenance clock publishing system |
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Granted publication date: 20091125 Termination date: 20121104 |