CN204086515U - For the multifunction timepiece tester that electric energy meter detects - Google Patents
For the multifunction timepiece tester that electric energy meter detects Download PDFInfo
- Publication number
- CN204086515U CN204086515U CN201420347755.4U CN201420347755U CN204086515U CN 204086515 U CN204086515 U CN 204086515U CN 201420347755 U CN201420347755 U CN 201420347755U CN 204086515 U CN204086515 U CN 204086515U
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- electric energy
- clock signal
- energy meter
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- 238000005259 measurement Methods 0.000 claims abstract description 17
- 239000013078 crystal Substances 0.000 claims abstract description 16
- 238000002955 isolation Methods 0.000 claims abstract description 9
- 238000013519 translation Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 238000012937 correction Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
- 238000009529 body temperature measurement Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000011031 large-scale manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
For the multifunction timepiece tester that electric energy meter detects, comprise main control chip and FPGA measurement chip, main control chip is connected with display translation unit, key circuit, temperature sensor and communication interface, FPGA measure chip signal input pin is connected with multichannel clock signal measurement unit, crystal pins is connected with constant temperature crystal, signal output pin is connected with output interface, power circuit provides working power; Main control chip and FPGA measure chip and are connected with RTC clock module, each clock signal input channel of multichannel clock signal measurement unit and FPGA measure between chip and are provided with buffer circuit, the signal output pin that FPGA measures chip is connected with output interface by buffer circuit, and measured clock signal inputs FPGA and measures chip after RC filtering, isolation and Shape correction.The utility model can to the RTC pps pulse per second signal synchro measure of multiple electric energy meter, and signal Isolation input, output are beneficial to the stability of guarantee equipment.
Description
Technical field
The utility model belongs to measuring instrument and meter manufacture and detection technique field, particularly relates to a kind of clock test instrument detected for electric energy meter.
Background technology
Along with the promotion and application of time-shared charge, step price; very high requirement is proposed to the clock accuracy of electric energy meter; and the clock test equipment for electric energy meter detection traditional mostly in the market is the measurement of single channel clock; once can only detect an electric energy meter; efficiency is low, can not meet the demand of large-scale production.In order to enhance productivity, ensure high precision and realize multi-channel synchronous measure; applicant once devised a kind of clock test instrument that can detect multipath clock simultaneously, calibrate; solve the technical bottleneck of large-scale production; but due to the further demand of development and market along with technology, be necessary to continue to develop the clock test instrument that accuracy is higher, performance is more stable, function is more complete.
Utility model content
The purpose of this utility model is to provide a kind of accuracy clock test instrument high, stable and reliable for performance.
To achieve these goals, the utility model takes following technical solution:
For the multifunction timepiece tester that electric energy meter detects, comprise main control chip and FPGA measurement chip, described main control chip is connected with display translation unit, key circuit, temperature sensor and communication interface, described FPGA measure chip signal input pin is connected with multichannel clock signal measurement unit, crystal pins is connected with constant temperature crystal, signal output pin is connected with output interface, power circuit provides working power for each parts; Described main control chip and FPGA measure chip and are connected with RTC clock module, each clock signal input channel of described multichannel clock signal measurement unit and FPGA measure between chip and are provided with buffer circuit, the signal output pin that described FPGA measures chip is connected with output interface by buffer circuit, and measured clock signal inputs described FPGA and measures chip after RC filtering, isolation and Shape correction.
The utility model more specifically technical scheme is, described multichannel clock signal measurement unit comprises 48 tunnel isolation clock signal input channels.
The utility model more specifically technical scheme is, described clock signal input channel adopts RJ45 interface as physical interface.
The utility model more specifically technical scheme is, described constant temperature crystal is the active oscillator exporting square-wave signal.
The utility model more specifically technical scheme is, described output interface is the physical interface of the square-wave signal of output 1 ~ 10MHz.
The utility model more specifically technical scheme is that described temperature sensor comprises external Temperature Humidity Sensor and built-in temperature sensor.
The utility model more specifically technical scheme is, described display translation unit is LCD screen.
From above technical scheme, the utility model accurately and reliably can rush signal to the RTC of nearly 48 pieces of electric energy meters and carry out synchro measure second, and be provided with high-frequency signal input, the output interface of band isolation, from circuit, interference source and the part that is easily disturbed are kept apart, make measure and control device and scene only holding signal contact, reduce interference and protection circuit, prevent circuit from damaging, guaranteed performance stability; And by the error compensation of RTC clock module, make equipment have clock source accurately and reliably, when to be convenient to other equipment accurately and reliably pair.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model embodiment.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in more detail.
Embodiment
As shown in Figure 1, multifunction timepiece tester of the present utility model comprises main control chip, FPGA measures chip, RTC clock module, power circuit, display translation unit, key circuit, temperature sensor, constant temperature crystal, multichannel clock signal measurement unit and communication interface, and power circuit provides working power for above-mentioned parts.Main control chip, FPGA measure chip, RTC clock module is connected to each other, RTC clock module provides system clock for tester, FPGA measures the clock accuracy that chip can measure RTC module, and compensates RTC module, guarantees the Stability and veracity of system clock.
The signal input pin that multichannel clock signal measurement unit and FPGA measure chip is connected, for FPGA measures chip input measured clock signal.The multichannel clock signal measurement unit of the present embodiment has 48 tunnel clock signal input channels, 48 road pps pulse per second signals can be measured simultaneously, each clock signal input channel and FPGA measure between chip and are provided with buffer circuit, and measured clock signal is measured between chip at input FPGA and needed through RC filtering, light-coupled isolation and Shape correction.Clock signal input channel adopts RJ45 interface as physical interface, convenient plug.The crystal pins that constant temperature crystal measures chip with FPGA is connected, and it provides standard time clock source signal for FPGA measures chip.Constant temperature crystal of the present utility model preferably adopts the active oscillator exporting square-wave signal, compared with the tuning fork shaped crystal oscillator of prior art, the square-wave signal precision that the active oscillator exporting square-wave signal produces is higher, constant temperature crystal measures chip input high-frequency pulse signal to FPGA, adopt precision higher than the constant temperature crystal of 0.05PPM as the time base of clock measuring instrument, ensure system to provide reliable signal source of clock.The signal output pin that FPGA measures chip is connected with output interface by buffer circuit, clock test instrument is made output area to be the square-wave signal of 1 ~ 10MHz, for detecting the accuracy of the frequency of this equipment or providing square-wave signal source accurately for other needs.
Display translation unit, key circuit, temperature sensor and communication interface are connected with main control chip, the display translation unit of the present embodiment is LCD screen, and display translation unit can show the running parameter etc. of the error amount of each passage, current environmental temperature and instrument.Key circuit is used for input operation order, as inquiry or parameters.As an optimal technical scheme of the present utility model, tester adopts double temperature sensor, comprise external moveable Temperature Humidity Sensor and built-in temperature sensor, wherein the temperature measurement accuracy of external Temperature Humidity Sensor is higher than 0.5 °, moisture measurement precision, can accurately measures ambient temperature and humidity higher than 5%; The temperature measurement accuracy of built-in temperature sensor is higher than 1 °; built-in temperature sensor is the carrying out safety backup to external Temperature Humidity Sensor; once external Temperature Humidity Sensor inefficacy or the deviation very large internal temperature sensor that can utilize, self-inspection is carried out to it; guarantee accuracy and the reliability of ambient temperature measurement, for calibration cycle accurate demarcates temperature.Communication interface is RS485/232 interface, communicates for PC, utilizes PC to realize the calibration of RTC clock module and inspection, temperature survey and the function such as calibration, clocking error inspection.
Base when clock test instrument employing High Accuracy Constant Temperature crystal of the present utility model is, multichannel clock signal measurement unit by 48 tunnel clock signals through RC filtering and the isolation of light lotus root, be input to FPGA after shaping and measure chip, when utilizing high precision, each road clock signal of base to input synchronously detects, calculates, and then exports to main control chip and carries out subsequent treatment.The RTC clock module band initial error of clock instrument and temperature error compensation, for equipment provides system clock source accurately and reliably, FPGA measures the clock accuracy that chip can measure RTC clock module, and fine compensation is carried out to RTC module, guarantee the Stability and veracity of system clock, guarantee the accurate operation of equipment and provide reliable signal source of clock for system.Clock test instrument of the present utility model for detecting accurately, calibrate multipath clock and provide equipment guarantee, improve the efficiency of detections, calibration clock in batches, solve the technical bottleneck of modernization large-scale production.
Above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although be described in detail the utility model with reference to above-described embodiment, those of ordinary skill in the field are to be understood that, still can modify to embodiment of the present utility model or equivalent replacement, and not departing from any amendment of the utility model spirit and scope or equivalent replacement, it all should be encompassed among right of the present utility model.
Claims (7)
1. for the multifunction timepiece tester of electric energy meter detection, comprise main control chip and FPGA measurement chip, described main control chip is connected with display translation unit, key circuit, temperature sensor and communication interface, described FPGA measure chip signal input pin is connected with multichannel clock signal measurement unit, crystal pins is connected with constant temperature crystal, signal output pin is connected with output interface, power circuit provides working power for each parts;
It is characterized in that:
Described main control chip and FPGA measure chip and are connected with RTC clock module, each clock signal input channel of described multichannel clock signal measurement unit and FPGA measure between chip and are provided with buffer circuit, the signal output pin that described FPGA measures chip is connected with output interface by buffer circuit, and measured clock signal inputs described FPGA and measures chip after RC filtering, isolation and Shape correction.
2. as claimed in claim 1 for the multifunction timepiece tester that electric energy meter detects, it is characterized in that: described multichannel clock signal measurement unit comprises 48 tunnel isolation clock signal input channels.
3. as claimed in claim 1 for the multifunction timepiece tester that electric energy meter detects, it is characterized in that: described clock signal input channel adopts RJ45 interface as physical interface.
4. as claimed in claim 1 for the multifunction timepiece tester that electric energy meter detects, it is characterized in that: described constant temperature crystal is the active oscillator exporting square-wave signal.
5., as claimed in claim 4 for the multifunction timepiece tester that electric energy meter detects, it is characterized in that: described output interface is the physical interface of the square-wave signal of output 1 ~ 10MHz.
6., as claimed in claim 1 for the multifunction timepiece tester that electric energy meter detects, it is characterized in that: described temperature sensor comprises external Temperature Humidity Sensor and built-in temperature sensor.
7., as claimed in claim 1 for the multifunction timepiece tester that electric energy meter detects, it is characterized in that: described display translation unit is LCD screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420347755.4U CN204086515U (en) | 2014-06-26 | 2014-06-26 | For the multifunction timepiece tester that electric energy meter detects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420347755.4U CN204086515U (en) | 2014-06-26 | 2014-06-26 | For the multifunction timepiece tester that electric energy meter detects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204086515U true CN204086515U (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420347755.4U Expired - Lifetime CN204086515U (en) | 2014-06-26 | 2014-06-26 | For the multifunction timepiece tester that electric energy meter detects |
Country Status (1)
| Country | Link |
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| CN (1) | CN204086515U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842653A (en) * | 2016-06-13 | 2016-08-10 | 国网江苏省电力公司电力科学研究院 | Simultaneous acquisition test circuit used for electric energy and clock pulses of electric energy meter |
| CN106199484A (en) * | 2016-06-23 | 2016-12-07 | 潍坊五洲浩特电气有限公司 | Mainboard error of time of day automatic debugging system |
| CN107024650A (en) * | 2016-01-29 | 2017-08-08 | 哈尔滨汇鑫仪器仪表有限责任公司 | A kind of PCB intelligent detection devices |
| CN107884608A (en) * | 2017-11-02 | 2018-04-06 | 钜泉光电科技(上海)股份有限公司 | A kind of electric energy meter control system and clock correction method |
| CN109541443A (en) * | 2019-01-10 | 2019-03-29 | 北京智芯微电子科技有限公司 | Real-time clock detection device and method |
-
2014
- 2014-06-26 CN CN201420347755.4U patent/CN204086515U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024650A (en) * | 2016-01-29 | 2017-08-08 | 哈尔滨汇鑫仪器仪表有限责任公司 | A kind of PCB intelligent detection devices |
| CN105842653A (en) * | 2016-06-13 | 2016-08-10 | 国网江苏省电力公司电力科学研究院 | Simultaneous acquisition test circuit used for electric energy and clock pulses of electric energy meter |
| CN106199484A (en) * | 2016-06-23 | 2016-12-07 | 潍坊五洲浩特电气有限公司 | Mainboard error of time of day automatic debugging system |
| CN107884608A (en) * | 2017-11-02 | 2018-04-06 | 钜泉光电科技(上海)股份有限公司 | A kind of electric energy meter control system and clock correction method |
| CN109541443A (en) * | 2019-01-10 | 2019-03-29 | 北京智芯微电子科技有限公司 | Real-time clock detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150107 |