CN201285444Y - Electric energy meter calibration apparatus - Google Patents
Electric energy meter calibration apparatus Download PDFInfo
- Publication number
- CN201285444Y CN201285444Y CNU2008202208324U CN200820220832U CN201285444Y CN 201285444 Y CN201285444 Y CN 201285444Y CN U2008202208324 U CNU2008202208324 U CN U2008202208324U CN 200820220832 U CN200820220832 U CN 200820220832U CN 201285444 Y CN201285444 Y CN 201285444Y
- Authority
- CN
- China
- Prior art keywords
- processing unit
- central processing
- unit
- data processing
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model discloses an electric energy meter calibrating device which comprises a waveform synthesizing unit, an error calculating unit, an upper computer and a data processing unit, wherein the data processing unit is respectively connected with the waveform synthesizing unit, the error calculating unit and the upper computer, the waveform synthesizing unit is controlled by a central processing unit, a counter port of the central processing unit is connected with a square wave synthesizing circuit, the central processing unit is connected with an encoder by an address bus and then is connected with the input end of a D/A converting circuit, the output end of the D/A converting circuit is connected with an operational amplification circuit, the output end of the operational amplification circuit is connected with a power amplification circuit which is used for outputting voltage and current signals, the port of the central processing unit is also connected with an amplitude reference circuit, the output end of the amplitude reference circuit is connected with the input end of the D/A converting circuit, and the data processing unit is connected with the waveform synthesizing unit and the error calculating unit by a CAN bus and is connected with the upper computer by the Ethernet. The waveform synthesizing unit of the utility model adopts the central processing unit to greatly simplify a peripheral circuit, the waveform can be quickly and flexibly realized, the cost and the power consumption are reduced, the data processing unit realizes data exchange with the units through the CAN bus to carry out long-distance communication, the error rate is low, the utilization rate and the reliability of the bus are high, more meter positions can be calibrated, and the communication speed can be greatly improved.
Description
Technical field
The utility model relates to a kind of device for measurement of electrical energy of Power Quality Monitor Device, is a kind of calibration equipment of electric energy meter specifically.
Background technology
The square-wave signal of the synthetic certain frequency of a lot of peripheral logical circuits such as the gate circuit that the waveform synthesis unit of present electric energy meter checking device adopts, counter, frequency divider, a lot of resolution elements cause the wiring complexity, cost is high, power consumption is big owing to use, and cause a lot of inconvenience for production, installation, maintenance etc.; Because waveform leaves in the outside wave memorizer, data read is wayward, can't realize controlling fast and effectively in the waveform building-up process.In the phase place handoff procedure,, cause when serious and report to the police even damage hardware because uncontrollable switching time is exported violent shake when causing phase place to switch.
In addition, the Error processing unit of present electric energy meter checking device is mainly finished tested Watch Error and is handled and simply control, can't achieve effective control for complex apparatus such as existing negative control terminals, if increase extra processing module, just cause the increase of distribution and cost.Error calculation unit is gathered and is uploaded to host computer by the RS485 bus after the tested Watch Error data and handle, and the total line use ratio of RS485 is low, and communication efficiency reduces, and system reliability is poor.And owing to utilize the clock check instrument to gather other data of tested table, the many more cablings of epi-position are many more, and distance is far away more, cause wiring complicated like this, and reliability reduces, and the above calibration equipment of 48 epi-positions just can't be realized.
In addition, host computer and data processing unit carry out exchanges data by RS232, divide the control unit to communicate by 485 buses and each, and traffic rate is low, the bit error rate is high, poor reliability.
The utility model content
The purpose of this utility model provides a kind of electric energy meter checking device, realizes the quick verification of multi-epitope, makes system have good stability, communication speed height, accurate advantage.
For achieving the above object, the utility model adopts following technical scheme: a kind of electric energy meter checking device, comprise the waveform synthesis unit, error calculation unit, host computer, data processing unit, data processing unit respectively with the waveform synthesis unit, error calculation unit is connected with host computer, it is characterized in that: described waveform synthesis unit is the waveform synthesis unit of central processing unit control, the counter port of central processing unit is connected with the square wave combiner circuit, central processing unit also connects code translator by address bus, the input end that connects the D/A change-over circuit afterwards, the output terminal of D/A change-over circuit connects discharge circuit, the output of discharge circuit connects power amplifier, power amplifier is used for the output voltage current signal, the port of central processing unit also is connected with the amplitude reference circuit, the output terminal of amplitude reference circuit is connected with the input end of D/A change-over circuit, data processing unit is by CAN bus and waveform synthesis unit, error calculation unit connects, and data processing unit is connected by Ethernet with host computer.
The central processing unit of described waveform synthesis unit also connects the relay control box by 485 buses.
Described error calculation unit is the error calculation unit of central processing unit control, the central processing unit of error calculation unit has the counter port that connects tested table and standard scale, the central processing unit of error calculation unit also is provided with 485 interfaces that are connected with tested table, and the central processing unit of error calculation unit also is provided with the CAN interface that is connected with data processing unit.
What described data processing unit adopted is central processing unit, the central processing unit of data processing unit is provided with 232 interfaces that are connected with standard scale, the central processing unit of data processing unit is connected with the GPS module by 232 buses, and the I/O port of the central processing unit of data processing unit also is connected with display screen.
The waveform synthesis unit of the utility model electric energy meter checking device adopts central processing unit, simplify peripheral circuit greatly, Wave data leaves the internal SRAM district of central processing unit in, and the time of data access shortens, the waveform fast and flexible is realized, and cost and power consumption reduction.Adopt the point of crossing phase shift technology to realize phase shift, reduce the waveform shake in the phase shift process greatly, realize the phase place smooth transition.Error calculation unit adopts central processing unit, realizes exchanges data by CAN bus and data processing unit, do not need usefulness clock tester just can verification multi-epitope more, speed is fast, the degree of accuracy height.Error calculation unit and waveform synthesis unit and data processing unit are realized exchanges data by the CAN bus, can telecommunication, and the bit error rate is low, reliability height, total line use ratio height.Host computer communicates by Fast Ethernet and data processing unit, can carry out long haul communication, the reliability height, and communication speed improves greatly.
Description of drawings
Fig. 1 is the utility model catenation principle block diagram;
Fig. 2 is a waveform synthesis unit theory diagram;
Fig. 3 is the error calculation unit theory diagram;
Embodiment
As shown in Figure 1, data processing unit adopts ARM7 core processor LPC2300, and processor LPC2300 connects standard scale by 232 buses, and the pulse of standard scale is input to the counter of processor LPC2300, processor LPC2300 connects host computer by ethernet mac, i.e. computing machine; Processor LPC2300 is connected with waveform synthesis unit, each error calculation unit by the CAN bus, and the output of waveform synthesis unit is used for tested table and standard scale provides electric current and voltage; Processor LPC2300 is connected with keyboard, liquid crystal display, power consumption module, humiture module and other 485 bus unit by 485 buses, processor LPC2300 also is connected with the GPS module by 232 buses, also is connected to display screen on the I/O port of processor LPC2300.The whole system operation process is as described below: data processing unit processor LPC2300 is by Fast Ethernet and compunication, receive the set information of user, processor LPC2300 and waveform synthesis unit are realized data communication by high-speed CAN bus, the waveform synthesis unit is given standard scale and tested table with the voltage and current of output, the pulse of standard scale and the pulse of tested table flow to corresponding error calculation unit, each error calculation unit is carried out exchanges data by CAN bus and processor LPC2300, and the various data preparation packings back that processor LPC2300 will receive is transmitted back to computing machine by Ethernet.The GPS module acceptance criteria time, be used for to the multifunctional meter time service, standard scale is communicated by letter with processor LPC2300 by 232 buses, and the counter of the pulse input processor LPC2300 of standard scale shows the data such as voltage, electric current, power of current output by display screen.Power consumption module is used for measuring the power consumption of tested table, the humiture module is measured the temperature and humidity of the current environment of tested table, to processor LPC2300, processor LPC2300 communicates by Ethernet and computing machine the data that these modules are measured by 485 data delivery.As user during, can import each by keyboard parameter is set without computing machine.
As shown in Figure 2, in the waveform synthesis unit, the control core adopts the processor STR710FZ2 of ARM7TDMI, the timer port of processor STR710FZ2 connects the square wave combiner circuit, the square wave combiner circuit is that crystal oscillator connects frequency divider, connect phaselocked loop again, timer 1 port of phaselocked loop connection processing device STR710FZ2, phaselocked loop also is connected with the timer 2 port.Processor STR710FZ2 is connected with the relay control box by 485 buses, processor STR710FZ2 is connected the input end of 6 16 D/A with code translator by address bus, the SPI port of processor STR710FZ2 connects the accurate LTC2600 of 8 roadbeds, the output terminal of the accurate LTC2600 of 8 roadbeds connects the input end of discharge circuit, the output terminal of discharge circuit connects the input end of 6 16 D/A change-over circuits, the output terminal of 16 D/A change-over circuits is connected with the discharge circuit input end, the output terminal of discharge circuit is connected with the input end of power amplifier, and the output of power amplifier is used for providing voltage and current signal to standard scale and calibrated meter.Processor STR710FZ2 also is connected with data processing unit by CAN bus, 232 buses.The port of processor STR710FZ2 also is connected with other peripheral circuit.
The principle of work of waveform synthesis unit is as shown in Figure 2: after processor STR710FZ2 receives the information of data processing unit by the CAN bus interface, obtain suitable voltage, the gear of electric current through internal calculation, make the relay control box be set to suitable gear by 485 buses; The output signal of crystal oscillator is passed through phaselocked loop (74HC4046) again and is realized frequency multiplication through the frequency divider frequency division, and the frequency signal after the frequency multiplication flows to phaselocked loop again, and phaselocked loop flows to timer 2 with this frequency signal again, handles back output through timer 2 and gets a signal frequency.Processor STR710FZ2 is by the divider ratio of program setting timer 1 and timer 2, calculating promptly gets and gets a signal frequency through program, processor STR710 FZ2 internal SRAM district sets up 6 waveform tables, the corresponding three-phase voltage U A of difference, UB, UC and three-phase current IA, IB, IC, STR710FZ2 takes out a Wave data respectively after sampling and getting the dot frequency signal from these six waveform tables, finish appointment by address bus and code translator to six D/A change-over circuits, deliver to 16 corresponding D/A change-over circuits then, the port of processor STR710FZ2 is connected with the accurate LTC2600 of 8 roadbeds, by the amplitude of the accurate LTC2600 control output voltage of 8 roadbeds electric current, the output of the accurate LTC2600 of 8 roadbeds provides a benchmark for 16 D/A conversion circuit through discharge circuit, discharge circuit is passed through in the output of 16 D/A change-over circuits again, and waveform signal is amplified to needed amplitude, imports power amplifier afterwards, waveform signal is brought up to certain carrying load ability, output need voltage and current signal.Processor STR710FZ2 also is provided with 232 interfaces and 485 interfaces in addition with standby.
As shown in Figure 3, the error calculation unit core adopts the ARM up-to-date Cortex-M3 core processor LM3S2139 of company, processor LM3S2139 is connected with data processing unit by the CAN bus, processor LM3S2139 is connected with tested table by 485 buses, the pulse output end of standard scale is connected with the counter 1 of processor LM3S2139, the counter 2 of the pulse output end of tested table and processor LM3S2139,4,5 connect, the IO mouth of processor LM3S2139 connects current-limiting resistance, connect driving circuit again, connect charactron afterwards, the IO mouth of processor LM3S2139 also is connected with the epi-position short-circuited conducting sleeve, and the PLL mouth connects standby crystal oscillator.The port of processor LM3S2139 also is connected with other control circuit.The principle of work of error calculation unit: the high-frequency impulse enter counter 1 of standard scale, tested table electronic impulse enter counter 2, counter 3 is reserved the input of one road high-frequency impulse, tested table time clock enter counter 4, tested table requirement recurrent pulse enter counter 5; High stability crystal oscillator pulse (1MHz) is used for timing day timing error by driving gate enter counter 6.Error calculation unit is after the pulse that receives tested table and standard scale, the pulse of the pulse of the tested table that will measure and standard scale contrast within a certain period of time, calculate error, and on charactron, show error information, clock frequency, day timing error etc. of tested table, simultaneously other communication data of the tested table that will receive by 485 bus interface of processor LM3S2139 sends to tested table by 485 buses, finish the part verification of tested table, processor LM3S2139 is transmitted back to data processing unit with the data of tested table loopback by the CAN bus then.Another road 485 interfaces of processor LM3S2139 are as the standby negative control terminal device in the future of developing, and the epi-position short-circuited conducting sleeve that the IO mouth is connect makes each error unit corresponding with the survey epi-position.
Claims (4)
1. electric energy meter checking device, comprise the waveform synthesis unit, error calculation unit, host computer, data processing unit, data processing unit respectively with the waveform synthesis unit, error calculation unit is connected with host computer, it is characterized in that: described waveform synthesis unit is the waveform synthesis unit of central processing unit control, the counter port of central processing unit is connected with the square wave combiner circuit, central processing unit also connects code translator by address bus, the input end that connects the D/A change-over circuit afterwards, the output terminal of D/A change-over circuit connects discharge circuit, the output of discharge circuit connects power amplifier, power amplifier is used for the output voltage current signal, the port of central processing unit also is connected with the amplitude reference circuit, the output terminal of amplitude reference circuit is connected with the input end of D/A change-over circuit, data processing unit is by CAN bus and waveform synthesis unit, error calculation unit connects, and data processing unit is connected by Ethernet with host computer.
2. electric energy meter checking device according to claim 1 is characterized in that: the central processing unit of described waveform synthesis unit also connects the relay control box by 485 buses.
3. electric energy meter checking device according to claim 1 and 2, it is characterized in that: described error calculation unit is the error calculation unit of central processing unit control, the central processing unit of error calculation unit has the counter port that connects tested table and standard scale, the central processing unit of error calculation unit also is provided with 485 interfaces that are connected with tested table, and the central processing unit of error calculation unit also is provided with the CAN interface that is connected with data processing unit.
4. electric energy meter checking device according to claim 3, it is characterized in that: what described data processing unit adopted is central processing unit, the central processing unit of data processing unit is provided with 232 interfaces that are connected with standard scale, the central processing unit of data processing unit is connected with the GPS module by 232 buses, and the I/O port of the central processing unit of data processing unit also is connected with display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202208324U CN201285444Y (en) | 2008-11-11 | 2008-11-11 | Electric energy meter calibration apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202208324U CN201285444Y (en) | 2008-11-11 | 2008-11-11 | Electric energy meter calibration apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201285444Y true CN201285444Y (en) | 2009-08-05 |
Family
ID=40950429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202208324U Expired - Fee Related CN201285444Y (en) | 2008-11-11 | 2008-11-11 | Electric energy meter calibration apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201285444Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087352A (en) * | 2011-01-31 | 2011-06-08 | 浙江省电力公司 | Three-phase intelligent watt-hour meter inspection device and method |
| CN102375136A (en) * | 2010-08-18 | 2012-03-14 | 深圳市科陆电子科技股份有限公司 | System and method for verifying electric energy meter on site |
| CN103064053A (en) * | 2012-12-14 | 2013-04-24 | 中国电力科学研究院 | Online calibration device of digital quantity input type electric energy meter |
| CN103197276A (en) * | 2013-03-28 | 2013-07-10 | 国家电网公司 | Reliability automatic detecting device of intelligent energy meter |
| CN103605105A (en) * | 2013-11-22 | 2014-02-26 | 江苏省电力公司常州供电公司 | Calibration device for digital electric energy meter of intelligent substation |
| CN104101857A (en) * | 2014-07-01 | 2014-10-15 | 杭州电子科技大学 | FlexRay bus-based electric energy meter error detection system and method |
| CN104330765A (en) * | 2014-11-12 | 2015-02-04 | 成都天兴电气有限公司 | Satellite navigation system based electric-energy-meter field calibration device |
| CN105158724A (en) * | 2015-08-18 | 2015-12-16 | 宁波三星智能电气有限公司 | NRF905-based wireless meter calibration system and meter calibration method thereof |
| CN105676162A (en) * | 2013-11-22 | 2016-06-15 | 江苏省电力公司常州供电公司 | Low-cost intelligent substation digital electric energy meter calibration device |
| CN110096094A (en) * | 2019-03-14 | 2019-08-06 | 九江学院 | A kind of arbitrary waveform generator system |
| CN110320487A (en) * | 2019-05-24 | 2019-10-11 | 中国南方电网有限责任公司超高压输电公司昆明局 | One kind 4~20mA calibration device |
| CN112566325A (en) * | 2020-12-25 | 2021-03-26 | 杭州辰汉智能科技有限公司 | Vehicle light regulation and control device and method |
-
2008
- 2008-11-11 CN CNU2008202208324U patent/CN201285444Y/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102375136A (en) * | 2010-08-18 | 2012-03-14 | 深圳市科陆电子科技股份有限公司 | System and method for verifying electric energy meter on site |
| CN102087352A (en) * | 2011-01-31 | 2011-06-08 | 浙江省电力公司 | Three-phase intelligent watt-hour meter inspection device and method |
| CN102087352B (en) * | 2011-01-31 | 2013-02-13 | 浙江省电力公司 | Three-phase intelligent watt-hour meter inspection device and method |
| CN103064053A (en) * | 2012-12-14 | 2013-04-24 | 中国电力科学研究院 | Online calibration device of digital quantity input type electric energy meter |
| CN103197276A (en) * | 2013-03-28 | 2013-07-10 | 国家电网公司 | Reliability automatic detecting device of intelligent energy meter |
| CN105676162A (en) * | 2013-11-22 | 2016-06-15 | 江苏省电力公司常州供电公司 | Low-cost intelligent substation digital electric energy meter calibration device |
| CN105676162B (en) * | 2013-11-22 | 2017-10-17 | 国网江苏省电力公司常州供电公司 | Low-cost intelligent substation digital electric energy meter calibration device |
| CN105699932B (en) * | 2013-11-22 | 2017-10-17 | 国网江苏省电力公司常州供电公司 | High-precision intelligent substation digital electric energy meter calibration device |
| CN103605105B (en) * | 2013-11-22 | 2016-02-03 | 江苏省电力公司常州供电公司 | Calibration device for digital electric energy meter of intelligent substation |
| CN103605105A (en) * | 2013-11-22 | 2014-02-26 | 江苏省电力公司常州供电公司 | Calibration device for digital electric energy meter of intelligent substation |
| CN105699932A (en) * | 2013-11-22 | 2016-06-22 | 江苏省电力公司常州供电公司 | High-precision intelligent substation digital electric energy meter calibration device |
| CN104101857A (en) * | 2014-07-01 | 2014-10-15 | 杭州电子科技大学 | FlexRay bus-based electric energy meter error detection system and method |
| CN104330765B (en) * | 2014-11-12 | 2017-07-18 | 成都天兴电气有限公司 | Electric energy meter field calibrating installation based on satellite navigation system |
| CN104330765A (en) * | 2014-11-12 | 2015-02-04 | 成都天兴电气有限公司 | Satellite navigation system based electric-energy-meter field calibration device |
| CN105158724A (en) * | 2015-08-18 | 2015-12-16 | 宁波三星智能电气有限公司 | NRF905-based wireless meter calibration system and meter calibration method thereof |
| CN105158724B (en) * | 2015-08-18 | 2018-05-29 | 宁波三星智能电气有限公司 | A kind of correction method based on the wireless meter correcting systems of nRF905 |
| CN110096094A (en) * | 2019-03-14 | 2019-08-06 | 九江学院 | A kind of arbitrary waveform generator system |
| CN110096094B (en) * | 2019-03-14 | 2023-03-14 | 九江学院 | Arbitrary waveform generator system |
| CN110320487A (en) * | 2019-05-24 | 2019-10-11 | 中国南方电网有限责任公司超高压输电公司昆明局 | One kind 4~20mA calibration device |
| CN112566325A (en) * | 2020-12-25 | 2021-03-26 | 杭州辰汉智能科技有限公司 | Vehicle light regulation and control device and method |
| CN112566325B (en) * | 2020-12-25 | 2023-06-13 | 杭州辰汉智能科技有限公司 | Vehicle light regulation and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201285444Y (en) | Electric energy meter calibration apparatus | |
| CN201327517Y (en) | Integrated detection device of electric power terminal | |
| CN201352235Y (en) | Three-phase multifunctional electric energy meter | |
| CN201867490U (en) | Calibration device for multiepitope standard electric energy meters | |
| CN201540330U (en) | Digital multifunctional network electrical measuring instrument | |
| CN101951024B (en) | Digital data acquisition device | |
| CN201402286Y (en) | Voltage drop detecting device of secondary circuit of voltage transformer | |
| CN206331109U (en) | A kind of radar range finding circuit | |
| CN107942168A (en) | A kind of replaceable digital and analog equipment for monitoring power quality and method | |
| CN108693495A (en) | A kind of DC electronic transformer detection converter that sampling is adaptive | |
| CN208421081U (en) | Wireless on-load vector test instrument | |
| CN201750433U (en) | Architectural energy consumption data acquisition device | |
| CN203786168U (en) | Three-phase high-precision multifunctional electric energy meter | |
| CN103513105A (en) | 220V synchronous phasor measurement device on user side | |
| CN107907850A (en) | Three-phase electric energy meter clock alignment and error calibrating method | |
| CN202166679U (en) | Intelligent dynamic-collecting terminal for three-phase electric energy data | |
| CN214895514U (en) | PWM control sequential sampling period transient frequency measuring circuit | |
| CN206945947U (en) | A kind of testing device of digital electric energy meter for sampling Detection | |
| CN206505112U (en) | A kind of multifunctional electric meter | |
| CN202177664U (en) | Single-phase electric energy data dynamic acquisition intelligent terminal | |
| CN202362445U (en) | Electronic type mutual inductor on-site check meter | |
| CN203433041U (en) | An electric energy meter provided with a communication function | |
| CN201382973Y (en) | Energy consumption monitoring system based on wireless sensor network | |
| CN201909813U (en) | Intelligent multifunctional high-voltage megohmmeter | |
| CN205317966U (en) | High accuracy multichannel automatic meteorological station atmospheric pressure examination appearance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHENG ZHOU SMS ELECTRIC CO., LTD. Free format text: FORMER NAME: SMS ELECTRIC CO.,LTD ZHENGZHOU |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Three Hui Industrial Park, No. fifth, 85 street, Zhengzhou economic and Technological Development Zone, Henan Province, China: 450000 Patentee after: Zhengzhou SMS Electric Co., Ltd. Address before: Three Hui Industrial Park, No. fifth, 85 street, Zhengzhou economic and Technological Development Zone, Henan Province, China: 450000 Patentee before: SMS Electric Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 Termination date: 20171111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |