CN202929374U - Voltage monitor time calibration circuit - Google Patents
Voltage monitor time calibration circuit Download PDFInfo
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- CN202929374U CN202929374U CN 201220568335 CN201220568335U CN202929374U CN 202929374 U CN202929374 U CN 202929374U CN 201220568335 CN201220568335 CN 201220568335 CN 201220568335 U CN201220568335 U CN 201220568335U CN 202929374 U CN202929374 U CN 202929374U
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- gps
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- circuit
- service module
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- 238000012544 monitoring process Methods 0.000 claims description 19
- 230000000694 effects Effects 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to a voltage monitor time calibration circuit. The circuit comprises a GPS antenna, a GPS timing module and a CPU. The GPS antenna is connected with the GPS timing module. GPS signals are led into the GPS timing module. The GPS timing module is connected with the CPU. The CPU reads the time data of the GPS timing module. In addition, the model of the GPS timing module is M12. The model of the CPU is 2812. An RS-232 output port of the GPS timing module is connected with an RS-232 input port of the CPU. The circuit of the utility model provides a new circuit which is high in precision and reliability and convenient to use for the voltage monitor time calibration. The timing precision provided by the circuit can reach 100 nS, and the circuit has no error accumulation effect, has high timing reliability, and has a significant value for guaranteeing the safe and stable operation of a power system.
Description
Technical field
The utility model belongs to GPS Service of Timing field, relates in particular to a kind of voltage monitoring instrument circuit time calibration.
Background technology
In electric system, voltage monitoring instrument is widely used, and high to the testing requirement of voltage monitoring instrument, the testing task is heavy.Detecting one of them big event of voltage monitoring instrument is time calibration, usually voltage monitoring instrument being carried out time calibration is to clock chip with a High Precision Crystal Oscillator transmitted, the pulse of going to read clock chip by CPU again comes computing time, as shown in Figure 1, there is larger defective in this time calibrating method, the one, the error ratio of crystal oscillator pulse is larger, can affect the precision of time service, and its time service precision is the 50mS left and right; The 2nd, because As time goes on crystal oscillator pulse error can add up, will be by manually revising calibration every a period of time, very inconvenient; The 3rd, the poor reliability of crystal oscillator.Therefore, voltage monitoring instrument novel circuit time calibration of researching and developing a kind of high precision, high reliability just seems very necessary.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of voltage monitoring instrument circuit time calibration is provided.
The utility model solves its technical matters and takes following technical scheme to realize:
A kind of voltage monitoring instrument circuit time calibration, be made of gps antenna, GPS time service module and CPU, gps antenna connects GPS time service module, and gps signal is incorporated into GPS time service module, GPS time service module is connected with CPU, and CPU reads the time data of GPS time service module.
And the model that described GPS time service module adopts is: M12, the model that described CPU adopts is: the RS-232 output port of 2812, GPS time service module is connected with the RS-232 input port of CPU.
Advantage of the present utility model and good effect are:
1, the utility model circuit provides a kind of high precision, high reliability, novel circuit easy to use time calibration for voltage monitoring instrument.
2, the time service precision that provides of the utility model circuit can reach 100nS, and error free cumulative effect, and the time service reliability is high, and is significant to ensureing the power system safety and stability operation.
Description of drawings
Fig. 1 is original voltage monitoring instrument circuit diagram time calibration;
Fig. 2 is voltage monitoring instrument circuit diagram time calibration of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is further described:
Therefore embodiment described in the utility model is illustrative, rather than determinate, can not be with the utility model embodiment as to restriction of the present utility model.
A kind of voltage monitoring instrument circuit time calibration, as shown in Figure 1, formed by gps antenna, GPS time service module and CPU, gps antenna connects GPS time service module, gps signal is incorporated into GPS time service module, and GPS time service module is connected with CPU, and CPU reads the time data of GPS time service module, after CPU reads accurately time data, with this accurately time data voltage monitoring instrument is carried out time calibration.
In embodiment of the present utility model, the model that described GPS time service module adopts is: M12, the model that described CPU adopts is: the RS-232 output port of 2812, GPS time service module is connected with the RS-232 input port of CPU.
Principle of work of the present utility model is:
Checking circuit of the present utility model reads the pulse per second (PPS) of tested voltage monitoring instrument, compare with the GPS pulse per second (PPS) of the utility model checking circuit, calculate the time error of voltage monitoring instrument, CPU in the utility model checking circuit sends the time revision directive to voltage monitoring instrument, but both deadline calibrations.
Claims (2)
1. voltage monitoring instrument circuit time calibration, it is characterized in that: be made of gps antenna, GPS time service module and CPU, gps antenna connects GPS time service module, and gps signal is incorporated into GPS time service module, GPS time service module is connected with CPU, and CPU reads the time data of GPS time service module.
2. voltage monitoring instrument circuit time calibration according to claim 1, it is characterized in that: the model that described GPS time service module adopts is: M12, the model that described CPU adopts is: the RS-232 output port of 2812, GPS time service module is connected with the RS-232 input port of CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568335 CN202929374U (en) | 2012-10-31 | 2012-10-31 | Voltage monitor time calibration circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568335 CN202929374U (en) | 2012-10-31 | 2012-10-31 | Voltage monitor time calibration circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202929374U true CN202929374U (en) | 2013-05-08 |
Family
ID=48219318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220568335 Expired - Fee Related CN202929374U (en) | 2012-10-31 | 2012-10-31 | Voltage monitor time calibration circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202929374U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068416A (en) * | 2015-06-29 | 2015-11-18 | 上海市政工程设计研究总院（集团）有限公司 | Single-point fixed electronic police system automatic time correcting method |
-
2012
- 2012-10-31 CN CN 201220568335 patent/CN202929374U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068416A (en) * | 2015-06-29 | 2015-11-18 | 上海市政工程设计研究总院（集团）有限公司 | Single-point fixed electronic police system automatic time correcting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20191031 |