CN113391543A - Time synchronization system calibration device based on Beidou GPS - Google Patents
Time synchronization system calibration device based on Beidou GPS Download PDFInfo
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- CN113391543A CN113391543A CN202110512732.9A CN202110512732A CN113391543A CN 113391543 A CN113391543 A CN 113391543A CN 202110512732 A CN202110512732 A CN 202110512732A CN 113391543 A CN113391543 A CN 113391543A
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
- G04R20/04—Tuning or receiving; Circuits therefor
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
- G04R20/06—Decoding time data; Circuits therefor
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Abstract
The invention discloses a time synchronization system calibration device based on a Beidou GPS (global positioning system), which solves the problem of low failure elimination success rate of a substation time synchronization system caused by no synchronous clock source equipment in the prior art, and comprises a Beidou GPS positioning time service module, a B code receiving, sending and photoelectric conversion module, a liquid crystal display module and a lithium battery charging and boosting power supply module, wherein the four modules are mutually connected, and the exterior of the device comprises an input and output interface, including an optical IRIG-B code input, an optical IRIG-B code output, an electric IRIG-B code input, an electric IRIG-B code output, a PPS code input, a PPS code output and an NTP output; the device comprises an alarm, a star lock and a synchronization state. The time service success rate of the invention reaches 100%, the time service performance is excellent, and the time service performance requirement of the transformer substation can be met; the time setting signals in 4 qualified formats can be sent, and the time setting output signal requirements of the transformer substation in various time setting modes can be met; the success rate of eliminating the defects is high.
Description
Technical Field
The invention relates to the technical field of power grids, in particular to a time synchronization system calibration device based on a Beidou GPS.
Background
The power grid system is a time-related system, the actions of a breaker and a protection device are required for the systematic analysis of the operation and the accident of the power grid, the time sequence of the occurrence of various events is required, and a substation providing the time sequence is essential for the time synchronization system. At present, 135 transformer substations governed by State power supply companies in China network and Huzhou are 22 transformer substations of 220kV, 91 transformer substations of 110kV and 22 transformer substations of 35kV, and each transformer substation is provided with a transformer substation time setting system.
The substation time synchronization system is very important, and is used for synchronizing time of equipment such as a fault recorder, a relay protection device, a measurement and control device and a background monitoring system, so that the equipment operates based on a uniform time reference, and the requirements of fault recording, real-time data acquisition time consistency, time sequence recording (SOE) and the like are met, and the process and the reason of various events can be accurately analyzed.
In an intelligent substation, the time setting precision required by the substation for the time setting system is less than 1us, and the importance of the time setting system is more and more prominent. When merging units are cascaded, each merging unit receives time tick signals of the same time synchronizer, and the abnormal time tick system causes the urgent defect of synchronous abnormal alarm of the merging units. For the line pilot differential protection and the bus differential protection, if a certain merging unit is abnormal in time pair, even protection malfunction may be caused. At present, during the period from 9 months to 2020 months in 2019, the secondary transformer class processes the failure elimination condition of the transformer substation against the time system, the failure elimination success rate of the time system is 22%, and the transformer overhaul center considers the requirement of teams on improving the working efficiency, and the failure elimination success rate of the transformer substation against the time system is regulated to be not lower than 60%. Because no special time synchronization system fault checking tool is provided, when a secondary equipment receiving module fault, a synchronous clock device sending module fault and a time synchronization channel loop fault occur, fault points are difficult to locate, so that defect elimination is unsuccessful, and the proportion of the number of times of unsuccessful defect elimination is 41.03%.
Disclosure of Invention
The invention aims to solve the problem of low failure elimination success rate of a transformer substation time setting system caused by non-synchronous clock source equipment in the prior art, and provides the time setting system calibration device based on the Beidou GPS, wherein the time setting success rate reaches 100%, the time setting performance is excellent, and the time setting performance requirement of the transformer substation is met.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a to time system calibration equipment based on big dipper GPS, includes big dipper GPS location time service module, and B sign indicating number is received, is sent and photoelectric conversion module, and liquid crystal display module, lithium cell charge and the power module that steps up interconnect between four modules.
Preferably, the Beidou GPS positioning and timing module comprises a resistor R1, a positioning and timing chip U1, a light emitting diode LED, a resistor R2, a resistor R3, a resistor R4, a diode D1, a boost chip U2, a capacitor C2, a battery BAT and a socket P2, wherein the power supply 2 is respectively connected with one end of the resistor R2, the anode of the diode D2, one end of the capacitor C2, the VCC end of the positioning and timing chip U2 and the output end of the buck chip U2, the other end of the resistor R2 is connected with the anode of the light emitting diode LED, the cathode of the light emitting diode LED is connected with the IPPS end of the positioning and timing chip U2, the cathode of the diode D2 is connected with one end of the resistor R2, one end of the resistor R2 is respectively connected with the anode of the battery BAT and the V _ BCKP end of the positioning and timing chip U2 through a second pin of the TXPS 2 and the positioning and timing chip 2, the power VCC is connected with the fifth pin of the socket P1, one end of the capacitor C2, the input of the voltage reduction chip U2 and the enable end of the voltage reduction chip U2 respectively, the other end of the capacitor C2 is grounded, the BP end of the voltage reduction chip U2 is grounded through the capacitor C5, and the other end of the capacitor C3 and the other end of the capacitor C4 are grounded.
Preferably, the B-code receiving, transmitting and photoelectric conversion module comprises a code input module for inputting a B-code and a PPS code, a code generation module for generating the B-code and the PPS code, a B-code output module, and a PPS code output module, and further comprises a resistor R11 and a resistor R12;
the code input module comprises a resistor R371, a resistor R372, an optocoupler B351, a B code input end IRIG _ B and a PPS code input end PPS, a power supply VCC is respectively connected with one end of the resistor R371, one end of the resistor R372 and an eighth pin of the optocoupler B351, the other end of the resistor R371 is connected with a first pin of the optocoupler B351, the IRIG _ B of the B code input end is connected with a second pin of the optocoupler B351, the other end of the resistor R371 is connected with a fourth pin of the optocoupler B351, and the PPS code input end PPS is connected with a third pin of the optocoupler B351;
the code generation module comprises a digital-to-analog converter D306, a resistor R300, a resistor R301, a capacitor C64, a capacitor C65, an operational amplifier ADS601, a capacitor C71, a triode Q301, a capacitor C72, a resistor R303, a resistor R304, a resistor R305, a capacitor C73 and a transformer T300; the power supply VCC is connected with the VDD end of the digital-to-analog converter D306, the output end of the D306 of the digital-to-analog converter is connected with one end of a resistor R300, the other end of the resistor R300 is respectively connected with one end of a resistor R301 and one end of a capacitor C64, the other end of the resistor R301 is respectively connected with one end of a capacitor C65 and the positive input end of an operational amplifier ADS601, the reverse input end of the operational amplifier ADS601 is respectively connected with the output end of the operational amplifier ADS601 and one end of a capacitor C71, the other end of the capacitor C71 is respectively connected with the base of a triode Q301, one end of a resistor R303 and one end of a resistor R304, the other end of the resistor R303 is respectively connected with one end of a capacitor C72 and the power supply VDDA1, the other end of the resistor C304 is respectively connected with one end of a resistor R305 and one end of a capacitor C73, the emitter of the triode Q301 is respectively connected with the other end of the resistor R305 and the other end of the capacitor C73, and the collector of the triode Q301 is connected with the transformer T300;
the B code output module comprises a chip D350 with the model of MAX3085, a resistor R201, a positive output end IRIG _ B _ OUT + of the B code and a negative output end IRIG _ B _ OUT-;
the PPS code output module comprises a chip D351 with the model of MAX3085, a resistor R202, a positive output end PPS _ OUT + of the PPS code and a negative output end PPS _ OUT-;
the power supply Vcc is respectively connected with one end of a resistor R11, one end of a resistor R12, an RE end of a chip D350, a DE end of the chip D350, an RE end of the chip D351 and a DE end of the chip D351, a TXD end of the chip D350 is respectively connected with the other end of a resistor R11 and a seventh pin of an optocoupler B351, a TXD end of the chip D351 is respectively connected with the other end of a resistor R12 and a sixth pin of the optocoupler B351, a positive output end IRIG _ B _ OUT + of a B code is respectively connected with one end of a resistor R201 and a 485+ end of the chip D350, the other end of the resistor R201 is respectively connected with a negative output end IRIG _ B _ OUT-of the B code and a 485-end of the chip D350, a positive output end PPS _ OUT + of the PPS code is respectively connected with one end of a resistor R202 and a 485+ end of the chip D351, and the other end of the resistor R202 is respectively connected with the negative output end of the PPS _ OUT-and the 485-end of the chip D351.
Preferably, the liquid crystal display module adopts a 1602LCD liquid crystal panel with 2x16 characters.
Preferably, the lithium battery charging and boosting power supply module adopts a T4056 chip based on 5V voltage. Preferably, the device comprises an input and output interface outside, wherein the input and output interface comprises an optical IRIG-B code input, an optical IRIG-B code output, an electric IRIG-B code input, an electric IRIG-B code output, a PPS code input, a PPS code output and an NTP output; the device comprises an alarm, a star lock and a synchronization state.
Therefore, the invention has the following beneficial effects:
1. the time service success rate of the invention reaches 100%, the time service performance is excellent, and the time service performance requirement of the transformer substation can be met;
2. the device can verify the input optical IRIG-B code, electric IRIG-B code and PPS pulse time tick signals, the verification accuracy is 100%, and the time tick signal verification requirements of the transformer substation under various time tick modes are met;
3. the time tick signals with 4 formats of qualified optical IRIG-B codes, electric IRIG-B codes, PPS pulses and SNTP network messages can be sent, and the time tick output signal requirements of the transformer substation in various time tick modes can be met;
4. the success rate of deletion is improved from 22% to 75%.
Drawings
Fig. 1 is a block diagram of the structure of the present embodiment.
Fig. 2 is a circuit diagram of the Beidou GPS positioning and time service module in the embodiment.
Fig. 3 is a circuit diagram of the B-code receiving, transmitting and photoelectric conversion module according to the present embodiment.
Fig. 4 is a top view of the input/output interface of the present embodiment.
Fig. 5 is a schematic view of the external structure of the present embodiment.
In the figure: 1. the Beidou GPS positioning time service module 2, the B code receiving, sending and photoelectric conversion module 21, the code input module 22, the code generation module 23, the B code output module 24, the PPS code output module 3, the liquid crystal display module 4 and the lithium battery charging and boosting power supply module.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
Example (b):
the embodiment provides a time tick system calibration equipment based on big dipper GPS, including interconnect big dipper location time service module 1, B sign indicating number receiving, send and photoelectric conversion module 2, liquid crystal display module 3 and liquid crystal display module 4 as figure 1.
As shown in fig. 2, the Beidou GPS positioning and timing module 1 includes a resistor R1, a positioning and timing chip U1, a light emitting diode LED, a resistor R2, a resistor R3, a resistor R4, a diode D1, a boost chip U2, a capacitor C2, a battery BAT and a socket P2, wherein a power supply 2 is connected with one end of the resistor R2, an anode of the diode D2, one end of the capacitor C2, a VCC end of the positioning and timing chip U2 and an output end of the buck chip U2, the other end of the resistor R2 is connected with an anode of the light emitting diode LED, a cathode of the light emitting diode LED is connected with an IPPS end of the positioning and timing chip U2, a cathode of the diode D2 is connected with one end of the resistor R2, one end of the resistor R2 is connected with an anode of the battery and a V _ BCKP end of the positioning and timing chip U2 through a second pin of the positioning and the socket P2, the power VCC is connected with the fifth pin of the socket P1, one end of the capacitor C2, the input of the voltage reduction chip U2 and the enable end of the voltage reduction chip U2 respectively, the other end of the capacitor C2 is grounded, the BP end of the voltage reduction chip U2 is grounded through the capacitor C5, and the other end of the capacitor C3 and the other end of the capacitor C4 are grounded.
As shown in fig. 3, the B-code receiving, transmitting and photoelectric conversion module 2 includes a code input module 21 for inputting the B-code and the PPS code, a code generation module 22 for generating the B-code and the PPS code, a B-code output module 23, and a PPS code output module 24, and further includes a resistor R11 and a resistor R12;
the code input module comprises a resistor R371, a resistor R372, an optocoupler B351, a B code input end IRIG _ B and a PPS code input end PPS, a power supply VCC is respectively connected with one end of the resistor R371, one end of the resistor R372 and an eighth pin of the optocoupler B351, the other end of the resistor R371 is connected with a first pin of the optocoupler B351, the IRIG _ B of the B code input end is connected with a second pin of the optocoupler B351, the other end of the resistor R371 is connected with a fourth pin of the optocoupler B351, and the PPS code input end PPS is connected with a third pin of the optocoupler B351;
the code generation module comprises a digital-to-analog converter D306, a resistor R300, a resistor R301, a capacitor C64, a capacitor C65, an operational amplifier ADS601, a capacitor C71, a triode Q301, a capacitor C72, a resistor R303, a resistor R304, a resistor R305, a capacitor C73 and a transformer T300; the power supply VCC is connected with the VDD end of the digital-to-analog converter D306, the output end of the D306 of the digital-to-analog converter is connected with one end of a resistor R300, the other end of the resistor R300 is respectively connected with one end of a resistor R301 and one end of a capacitor C64, the other end of the resistor R301 is respectively connected with one end of a capacitor C65 and the positive input end of an operational amplifier ADS601, the reverse input end of the operational amplifier ADS601 is respectively connected with the output end of the operational amplifier ADS601 and one end of a capacitor C71, the other end of the capacitor C71 is respectively connected with the base of a triode Q301, one end of a resistor R303 and one end of a resistor R304, the other end of the resistor R303 is respectively connected with one end of a capacitor C72 and the power supply VDDA1, the other end of the resistor C304 is respectively connected with one end of a resistor R305 and one end of a capacitor C73, the emitter of the triode Q301 is respectively connected with the other end of the resistor R305 and the other end of the capacitor C73, and the collector of the triode Q301 is connected with the transformer T300;
the B code output module comprises a chip D350 with the model of MAX3085, a resistor R201, a positive output end IRIG _ B _ OUT + of the B code and a negative output end IRIG _ B _ OUT-;
the PPS code output module comprises a chip D351 with the model of MAX3085, a resistor R202, a positive output end PPS _ OUT + of the PPS code and a negative output end PPS _ OUT-;
the power supply Vcc is respectively connected with one end of a resistor R11, one end of a resistor R12, an RE end of a chip D350, a DE end of the chip D350, an RE end of the chip D351 and a DE end of the chip D351, a TXD end of the chip D350 is respectively connected with the other end of a resistor R11 and a seventh pin of an optocoupler B351, a TXD end of the chip D351 is respectively connected with the other end of a resistor R12 and a sixth pin of the optocoupler B351, a positive output end IRIG _ B _ OUT + of a B code is respectively connected with one end of a resistor R201 and a 485+ end of the chip D350, the other end of the resistor R201 is respectively connected with a negative output end IRIG _ B _ OUT-of the B code and a 485-end of the chip D350, a positive output end PPS _ OUT + of the PPS code is respectively connected with one end of a resistor R202 and a 485+ end of the chip D351, and the other end of the resistor R202 is respectively connected with the negative output end of the PPS _ OUT-and the 485-end of the chip D351.
The code receiving module receives Beidou GPS dual-mode satellite signals as external reference signals, time frequency synchronization is carried out on the module by using external time frequency signals, acquisition, demodulation and generation of the time signals are completed by adopting an STM32F4 single chip microcomputer, IRIG-B code signals and 1PPS synchronization pulse signals are generated.
Through cooperation among several modules, the device has the functions of input detection and output test of B code signals.
The liquid crystal display module 3 is mainly used for displaying time, can visually see the time acquired by the current clock source, and can also display the time output by the device at the moment when testing, so that whether the time setting of the tested device is consistent with the device output or not can be conveniently checked, and the problem of the site can be judged. Since not much information is required to be displayed, the 1602LCD liquid crystal panel using the simplest 2x16 characters is sufficient to display, and the panel will display time including year, month, day, hour, minute, second and the number of satellites locked in.
The acquisition of time and satellite number is acquired by decoding a GPS/Beidou module and a B code, wherein the time synchronization module adopts a standard NMEA-0183 protocol, the protocol adopts ASCII code to transmit GPS positioning information, the message of the CPU acquisition module is processed to carry out display processing on a liquid crystal panel, and the liquid crystal panel simultaneously processes the time analyzed by the B code decoding module.
The lithium battery charging and boosting power supply module 4 is customized based on 5V voltage, and is convenient for integrating and processing the built-in battery module. In order to facilitate the field use of the device, a lithium battery and a charging and discharging module are additionally designed.
The module adopts 10000mAh polymer lithium battery, has the advantages of small volume, large capacity, small internal resistance and the like, and provides strong power for long-time work of equipment.
The charging and boosting power supply module adopts a mature T4056 chip scheme and a chip mounting process, and has the following functions:
1) charging a lithium battery; 2) lithium battery protection (short circuit, overvoltage, undervoltage); 3) the boost output is optional 5 v; 4) a universal DC5.5 charging interface is provided, and DC5V is directly input to charge the lithium battery; 5) the two-color LED indicates the charging state, the green lamp is full of the LED and is normally on, and the charging is automatically stopped; 6) UPS has a power failure uninterrupted power supply function: when the power supply is powered on, the power supply directly supplies power to the load through the booster circuit, once the power supply is powered off, the battery access is automatically started to supply power to the load through the booster circuit, and after the power supply is powered on, the power supply is recovered to supply power to the load and simultaneously charge the battery.
The module has the UPS function, ensures that the equipment cannot be powered off, and does not influence the field maintenance and debugging. The finished product is as follows, the volume is small, and the integration is convenient.
As shown in fig. 4 and 5, the device includes an input/output interface outside, has input and output capabilities for time synchronization signals, and can cover all time synchronization modes of the substation, including optical IRIG-B code input, optical IRIG-B code output, electrical IRIG-B code input, electrical IRIG-B code output, PPS code input, PPS code output, and NTP output; the device comprises an alarm, a star locking and a synchronous state, realizes the subfunction of each module, completes the interface and interactive design, develops software hardware and can display the various states and functions.
The device is tested on site, 5 remote transformer substations in three counties and two areas of Huzhou are selected, and the measuring time service success rate reaches 100; respectively inputting qualified and unqualified light IRIG-B codes, electric IRIG-B codes and PPS pulse time tick signals to corresponding interfaces, testing each time tick signal for 10 times, observing whether the state of an input signal LED lamp is correct or not, and finally detecting that the correct rate reaches 100%; and at a secondary debugging base, time synchronization signals in 4 formats of an optical IRIG-B code, an electric IRIG-B code, PPS pulse and an SNTP network message are respectively sent to corresponding protection measurement and control devices from each output interface, each signal is verified ten times, and an observation device is externally displayed, so that the requirements of the transformer substation on time synchronization output signals in various time synchronization modes can be met. The total number of various time synchronization system faults of each transformer substation in 8-10 months in 2020 is 24, the defect eliminating success frequency of the device reaches 18 times, and is increased from 22% to 75%, and the fault eliminating success rate is obviously increased.
The above embodiments are described in detail for the purpose of further illustrating the present invention and should not be construed as limiting the scope of the present invention, and the skilled engineer can make insubstantial modifications and variations of the present invention based on the above disclosure.
Claims (6)
1. The utility model provides a to time system calibration equipment based on big dipper GPS, characterized by, includes big dipper GPS location time service module, B sign indicating number is received, is sent and photoelectric conversion module, liquid crystal display module, lithium cell charging and the power module that steps up, interconnect between four modules.
2. The time tick system calibration device based on the Beidou GPS as claimed in claim 1, wherein the Beidou GPS positioning time tick module comprises a resistor R1, a positioning time tick chip U1, a light emitting diode LED, a resistor R2, a resistor R3, a resistor R4, a diode D1, a boost chip U2, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a battery BAT and a socket P1, a power supply VCC3.3V is respectively connected with one end of a resistor R1, the anode of a diode D1, one end of a capacitor C3, the VCC end of the positioning time tick chip U3 and the output end of a buck chip U3, the other end of the resistor R3 is connected with the anode of the light emitting diode LED, the cathode of the light emitting diode LED is connected with the IPPS end of the positioning time tick chip U3, the cathode of the diode D3 is connected with one end of the resistor R3, one end of the resistor R3 is respectively connected with the anode of the battery BAT and the BCV _ KP of the positioning time tick chip U3, and the RXOP end of the positioning time tick chip is connected with the second pin of the second chip 3, the TXD end of the positioning time service chip U1 is connected with the third pin of the socket P1 through a resistor R4, a power supply VCC is respectively connected with the fifth pin of the socket P1, one end of a capacitor C2, an input single of the voltage reduction chip U2 and the enabling end of the voltage reduction chip U2, the other end of the capacitor C2 is grounded, the BP end of the voltage reduction chip U2 is grounded through a capacitor C5, and the other end of the capacitor C3 and the other end of the capacitor C4 are grounded.
3. The time tick system calibration device based on the Beidou GPS (global positioning system) as claimed in claim 1, wherein the B code receiving, sending and photoelectric conversion module comprises a code input module for inputting B codes and PPS codes, a code generation module for generating the B codes and the PPS codes, a B code output module and a PPS code output module, and further comprises a resistor R11 and a resistor R12;
the code input module comprises a resistor R371, a resistor R372, an optocoupler B351, a B code input end IRIG _ B and a PPS code input end PPS, a power supply VCC is respectively connected with one end of the resistor R371, one end of the resistor R372 and an eighth pin of the optocoupler B351, the other end of the resistor R371 is connected with a first pin of the optocoupler B351, the IRIG _ B of the B code input end is connected with a second pin of the optocoupler B351, the other end of the resistor R371 is connected with a fourth pin of the optocoupler B351, and the PPS code input end PPS is connected with a third pin of the optocoupler B;
the code generation module comprises a digital-to-analog converter D306, a resistor R300, a resistor R301, a capacitor C64, a capacitor C65, an operational amplifier ADS601, a capacitor C71, a triode Q301, a capacitor C72, a resistor R303, a resistor R304, a resistor R305, a capacitor C73 and a transformer T300; the power supply VCC is connected with the VDD end of the digital-to-analog converter D306, the output end of the D306 of the digital-to-analog converter is connected with one end of a resistor R300, the other end of the resistor R300 is respectively connected with one end of a resistor R301 and one end of a capacitor C64, the other end of the resistor R301 is respectively connected with one end of a capacitor C65 and the positive input end of an operational amplifier ADS601, the reverse input end of the operational amplifier ADS601 is respectively connected with the output end of the operational amplifier ADS601 and one end of a capacitor C71, the other end of the capacitor C71 is respectively connected with the base of a triode Q301, one end of a resistor R303 and one end of a resistor R304, the other end of the resistor R303 is respectively connected with one end of a capacitor C72 and the power supply VDDA1, the other end of the resistor C304 is respectively connected with one end of a resistor R305 and one end of a capacitor C73, the emitter of the triode Q301 is respectively connected with the other end of the resistor R305 and the other end of the capacitor C73, and the collector of the triode Q301 is connected with the transformer T300;
the B code output module comprises a chip D350 with the model of MAX3085, a resistor R201, a positive output end IRIG _ B _ OUT + of the B code and a negative output end IRIG _ B _ OUT-;
the PPS code output module comprises a chip D351 with the model of MAX3085, a resistor R202, a positive output end PPS _ OUT + of the PPS code and a negative output end PPS _ OUT-;
the power supply Vcc is respectively connected with one end of a resistor R11, one end of a resistor R12, an RE end of a chip D350, a DE end of the chip D350, an RE end of the chip D351 and a DE end of the chip D351, a TXD end of the chip D350 is respectively connected with the other end of a resistor R11 and a seventh pin of an optocoupler B351, a TXD end of the chip D351 is respectively connected with the other end of a resistor R12 and a sixth pin of the optocoupler B351, a positive output end IRIG _ B _ OUT + of a B code is respectively connected with one end of a resistor R201 and a 485+ end of the chip D350, the other end of the resistor R201 is respectively connected with a negative output end IRIG _ B _ OUT-of the B code and a 485-end of the chip D350, a positive output end PPS _ OUT + of the PPS code is respectively connected with one end of a resistor R202 and a 485+ end of the chip D351, and the other end of the resistor R202 is respectively connected with the negative output end of the PPS _ OUT-and the 485-end of the chip D351.
4. The time tick system calibration device based on the Beidou GPS as claimed in claim 1, wherein the liquid crystal display module adopts a 1602LCD panel with 2x16 characters.
5. The time tick system calibration device based on the big dipper GPS of claim 1, characterized by, the lithium battery charging and power supply module that steps up adopts T4056 chip based on 5V voltage.
6. The time tick system calibration device based on the Beidou GPS (global positioning system) as claimed in any one of claims 1-5, wherein the external part of the device comprises input and output interfaces, wherein the input and output interfaces comprise an optical IRIG-B code input, an optical IRIG-B code output, an electric IRIG-B code input, an electric IRIG-B code output, a PPS code input, a PPS code output and an NTP output; the device comprises an alarm, a star lock and a synchronization state.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113391544A (en) * | 2021-05-11 | 2021-09-14 | 国网浙江省电力有限公司湖州供电公司 | Time synchronization system calibration device and method based on Beidou GPS |
| CN114063435A (en) * | 2021-11-17 | 2022-02-18 | 国网四川省电力公司广安供电公司 | Time synchronization instrument, and clock device detection method and system based on time synchronization instrument |
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| CN114063435B (en) * | 2021-11-17 | 2023-02-28 | 国网四川省电力公司广安供电公司 | Time synchronization instrument, and clock device detection method and system based on time synchronization instrument |
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