CN103149546A - Portable electric energy measuring terminal comprehensive calibration instrument on site - Google Patents

Portable electric energy measuring terminal comprehensive calibration instrument on site Download PDF

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Publication number
CN103149546A
CN103149546A CN2012105030413A CN201210503041A CN103149546A CN 103149546 A CN103149546 A CN 103149546A CN 2012105030413 A CN2012105030413 A CN 2012105030413A CN 201210503041 A CN201210503041 A CN 201210503041A CN 103149546 A CN103149546 A CN 103149546A
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CN
China
Prior art keywords
module
electric energy
portable electric
input
energy measuring
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CN2012105030413A
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Chinese (zh)
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CN103149546B (en
Inventor
张庆辉
金广锋
张强
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河南工业大学
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Priority to CN201210503041.3A priority Critical patent/CN103149546B/en
Publication of CN103149546A publication Critical patent/CN103149546A/en
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Abstract

The invention relates to a portable electric energy measuring terminal comprehensive calibration instrument on site. The calibration instrument comprises an operation processor (1), an operation processor (2), a voltage sampling module, a current sampling module, an active and reactive power pulse input module, an access device (AD) converter, a displayer, a keyboard, a sampling switching module and a gain amplification module. The detector further comprises an on-off output module, a control detection input module, a carrier communication module, an active and reactive power pulse output module, and the control detection module is used for calculating and controlling the power parameter. The operation processor (1) is connected on the pulse output module and the on-off output module through an output switching module, the pulse output module is used for measuring and detecting the instrument with higher accuracy, the on-off output module is used for controlling the signal output and the on-off input of a device to be detected, the carrier communication module is used for completing the detection of the infrared and the carrier communication with the help of an infrared communication interface. A problem that the calibration function of the prior electric energy measuring device calibration instrument on site is single is solved.

Description

The field integrated tester of a kind of portable electric energy measuring terminal

Technical field

The present invention relates to the field integrated tester of a kind of portable electric energy measuring terminal.

Background technology

Along with developing rapidly of national economy, the raising day by day of living standards of the people, and the fast development of regional economy, electricity consumption client's demand is not that " have electricity according to bright " is just satisfiable already, but needs " Electrical Safety, power supply is reliable, electric energy is of fine quality, working is efficient, have reasonable fee, provide good service ".The present service level in electrical power services market, also there is a big difference with economic development and customer demand, and many demands of client can't satisfy or satisfy well.Customer demand determines the market development direction, and therefore the current potential demand that high-quality, efficient, thoughtful power technology are served is very large, also very strong.

present electric power meter on-site calibrator is generally by the voltage sample module, the current sample module, analog switch, A/D converter, processor, the pulse load module, keyboard and display form, during field-checking, by the sampling module of the voltage and current signal of school electric energy meter access instrument, carry out the conversion of signal by processor control simulation switch, and be digital signal by AD converter with analog signal conversion, calculate in real time electric parameter, calibration voltage, the size of electric current, and acquisition pulse signal, detect the size of electric energy, finally realize the verification of electric power meter.But existing this tester is exactly generally the size of verification electric current, voltage, power, electric energy, and verifying function is single, and only carries out the switching of voltage, current signal by an analog switch, and switch speed is slow, power consumption is higher.

Summary of the invention

The purpose of this invention is to provide the field integrated tester of a kind of portable electric energy measuring terminal, in order to solve the existing single problem of electric power meter on-site calibrator verifying function.

for achieving the above object, the solution of the present invention is: the field integrated tester of a kind of portable electric energy measuring terminal comprises arithmetic processor (1), arithmetic processor (2), the voltage sample module, the current sample module, gain merit and idle pulse load module, AD converter, display, keyboard, sampling handover module and gain amplification module, described sampling handover module is analog switch, described voltage sample module connects described gain amplification module, this gain amplification module is by described AD converter concatenation operation processor (1), described current sample module connects described analog switch, this analog switch connects described gain amplification module, described gain amplification module is connected to arithmetic processor (1) by described AD converter, the input port of described meritorious and idle pulse load module concatenation operation processor (1), this tester also comprises switching value output module, control and detect load module, carrier communication module, gain merit and idle pulse output module, described control detects load module input concatenation operation processor (1), is used for the electrical energy parameter calculation and control, described arithmetic processor (1) is connected to pulse output module and switching value output module by an output switching module, described pulse output module is used for more, and the high precision instrument metering detects, described switching value output module is used for control signal output and the input of tested facility switching amount, described carrier communication module is connected with described arithmetic processor (1) input, be used for by infrared communication interface, complete the detection of infrared and carrier communication.

This tester also comprises contact control module, and this module connects described arithmetic processor (2);

Described voltage sample module comprises three-phase voltage input signal end, overvoltage protective module and dividing potential drop filtration module, and three-phase input voltage is sampled by described dividing potential drop filtration module through after described overvoltage protective module.

Described current sample module comprises current transformer and split core type current transformer, adopts respectively the metal film sampling resistor to sample at described current transformer and split core type current transformer secondary side.

Described gain amplification module is the gear switch module, and described gear switch module is the programmable gain amplifier with multiple gain, is used for selecting different gains to amplify as required.

Described pulse input and output module adopts the 6N173 High-Speed Coupled Device.

Described display adopts the liquid crystal display with touch function.

It is the high speed ARM arithmetic processor of STM32F103VET6 that described arithmetic processor (1) and arithmetic processor (2) adopt model.

Described programmable gain amplifier adopts AD526JNZ.

The beneficial effect that the present invention reaches: the current signal of (1) current sample module of the present invention first switches by analog switch, and then be input to the two-stage programmable gain amplifier and amplify, adopted the elementary mode that adds secondary two-stage gain amplifier and analog switch switching, the faster power consumption of switch speed is lower, and select gain amplifier with different gains, the voltage and current signal amplifies sampling by different gains, can obtain different signal inputs, make small voltage and little electric current also highly stable;

(2) the present invention not only has the Keyboard Control module, also be provided with contact control module, display has the function of touch, when carrying out the calculating of electrical parameter, can adopt keyboard and touch the parameter that the dual mode input needs measurement, when one of them breaks down, can make and carry out in another way work, improved the reliability of work;

(3) on-site calibrator of the present invention comprises the output of current sample, voltage sample, pulse input and output, control inputs, switching value, not only can carry out voltage, electric current and electric energy detection, can also carry out the pulse input and detect, control and detect and the remote signalling detection, can realize multi-functional detection.

Description of drawings

Fig. 1 is the field integrated tester theory diagram of portable electric energy measuring terminal of the present invention;

Fig. 2 is the principle schematic of voltage check part of the present invention;

Fig. 3 is the principle schematic of electric current check part of the present invention;

Fig. 4 is the principle schematic of pulse output of the present invention;

Fig. 5 is the principle schematic of pulse input of the present invention;

Fig. 6 is transducer check schematic diagram of the present invention.

Embodiment

The present invention will be further described in detail below in conjunction with accompanying drawing.

As shown in Figure 1, on-site calibrator of the present invention comprises voltage sample module, current sample module, sampling module switching, gear switch module, ultra high speed A/D conversion module, RS232 communication module, RS485 communication module, meritorious, idle pulse input and output module, controls and detect load module, switching value output module, carrier communication module, output switching module, liquid crystal display and contact control module and the Keyboard Control module forms.

Voltage signal is by the voltage sample module samples, and the signal that sampling obtains is selected the suitable gain amplification that gains through the gear switch switch, then passes through AD converter, then is admitted to operation processing unit 1; The current sample module comprises mutual inductor sample and split-core type meter sampling, two-way current signal after sampling is after the selection of over-sampling handover module, send into the gear switch switch and select the suitable gain amplification that gains, then pass through AD converter, then be admitted to operation processing unit 1; Meritorious and the idle pulse input signal that the pulse load module produces is admitted to arithmetic processor 1 through amplitude limit, shaping pulse and isolation; Control detection, switching value input and output switching and control by optocoupler TLP521, to arithmetic processor 1, send through TLP521 by output quantity through TLP521 for input quantity, and input and output are switched by the four-way analog switch; Arithmetic processor 1 is according to the various signals that receive, carry out computing, judgement, and result is sent into arithmetic processor 2, arithmetic processor 2 according to the input of keyboard or touch control needs parameter and the constant of electric energy meter measured, calculating needs the parameter of verification, and result of calculation is shown by display.

Also be connected with RS232 communication module, RS485 communication module and carrier communication module on arithmetic processor 1, by 232 general interfaces, conveniently receive computer, the several functions such as can be used for checking meter, the RS485 communication module is by internal state machine and additional reception comparer, can judge when the front wheel driving bus be other nodes on device itself or network, and by with the outside on leave behind the coordinating of resistance, can realize the automatic reverse of data transmission.

Concentrator, collector are carried out the carrier communication Function detection with the equipment of carrier communication module, can be by infrared communication interface, complete the detection of infrared and carrier communication: by infrared interface to detected equipment generation test command, if detected equipment receives orders, return to test data by carrier interface to tester, through providing the communication check result after the tester checking, complete the detection of infrared and carrier communication.Can configure simultaneously the carrier module of different center frequency, the carrier communication of various acquisition terminals commonly used is detected.

To electric energy meter, concentrator with specially become the electric energy metrical function check of acquisition terminal, can and receive on detected equipment the voltage input end of tester, to show by current terminal the current input terminal that the school instrument seals in detected equipment, and the pulse output end of connection serial line interface or detected equipment, undertaken detecting in real time and processing by electric current, voltage vector, realize by the test of calibration equipment electric energy metrical unit; By serial ports RS232 or RS485, the data transmission of these equipment is compared verification, or measure by the pulse output that the pulse detection port reads detected equipment, complete by the detection of calibration equipment electric energy metrical function.

To concentrator, specially become the control Function detection of acquisition terminal, connect the control output of detected equipment and the control of tester and detect input end, when detected equipment sends corresponding control signal, the control inputs detecting unit of tester detects the control output function of these equipment, detect its signal pulse width and waveform of controlling output and detect, the various control modules of completing equipment detect and test.

As Fig. 2; voltage acquisition module comprises three-phase voltage input signal end, overvoltage crowbar and pressure filter circuit; the three-phase voltage signal of input is after overvoltage crowbar; enter pressure filter circuit, adopt that precision is high, the metalfilmresistor potential-divider network of Heat stability is good is to voltage sample, sample resistance is selected 120 Ω; divider resistance should select 4 50 k Ω; the precision of resistance is 0.1%, and temperature coefficient is 5ppm, its maximum detection amount 576 V peak value phase voltages.Voltage signal after sampling exports ∑-Δ analog to digital converter (ADC) to through accurate program controlled programmable amplifier (PGA), is admitted at last arithmetic processor and processes computing.The computing formula of voltage data is as follows:

As Fig. 3, the current acquisition module comprises current transformer and split core type current transformer, and the current transformer selected range is Miniature precision Current Transmit-X-1 of 0~20A, and its secondary rated current effective value is 10 mA, sampling resistor R=18 Ω, accuracy class is 0.01 grade; The model that split core type current transformer adopts is the KLC-8C type, the maximum 10A of primary current, and secondary is surveyed electric current 10mA, 0.1 grade of precision, 2 ohm of pull-up resistors.The mutual inductor secondary side uses the metalfilmresistor sampling, and the mutual inductor output signal after sampling and split-core type meter output signal use low internal resistance analog switch MAX4679E to switch, and after amplifying through PGA, exports ADC to, then enters arithmetic processor and processes computing.The computing formula of current data is as follows:

As shown in Figure 4 and Figure 5, meritorious, idle pulse input and output circuit adopts High-Speed Coupled Device 6N137, and pulse input and output amount is all provided by the ARM arithmetic processor, and through the 6N137 isolation.The high and low frequency input pulse switches by the analog switch 74HC4052 of four-way, and high-frequency impulse produces low-frequency pulse through 10000 frequency divisions.The tester input pulse uses high speed photo coupling to carry out electrical isolation; the conservation treatment device; and raising equipment antijamming capability; the input pulse error is calculated the timer counter pattern that adopts; within the regular hour; statistics high-frequency impulse and input pulse number, and calculate the electrical energy pulse error according to the meter constant that the user arranges, more more accurate and efficient than using the fixed pulse number of turns.Input by pulse and detect remote measurement, the remote signaling function complete equipment, by specific pulse pattern and width judge the various states of equipment under test and partial function whether normal.

As Fig. 6, on mutual inductor detected, equipment provided mutual inductor a test signal, and measured its output signal at secondary side simultaneously, calculated the precision and stability of mutual inductor ratio.Can be according to measurement data size automatic switching range in test process; Automatically storage: can store 50 groups of (fully loaded and underloading) measurement data; Robotization is whole: it is whole automatically to carry out according to the class of accuracy of tested mutual inductor error informationization, and judges whether overproof; The S level is directly measured; Can directly measure S level mutual inductor, measurement range is wide; Can according to the measurement point of rules requirement, by the different accuracy requirement, automatically be fully loaded with and the underloading measurement.

Measurement range:

In-phase component (%): 0.0001~19.99 resolution: 0.001

Quadrature component (dividing): 0.001~500 resolution: 0.001

Impedance (W): 0.0001~6.99 resolution: 0.001

Admittance (ms): 0.0001~6.99 resolution: 0.001

Working range:

Electric current: (1% ~ 150%) In (In=5A)

(5%~150%)In??(In=1A)

Voltage: (5% ~ 150%) Un (Un=100V, 150V, 100V/)

(5%~190%)Un??(Un=100V/3)

the field integrated tester of the present invention comprises the electric energy acquisition mainboard, control base plate and guidance panel, this electric energy acquisition mainboard comprises current collection circuit, voltage collection circuit, the pulse imput output circuit, control testing circuit, 485 telecommunication circuits, 232 telecommunication circuits and battery electric quantity Acquisition Circuit, be used for gathering three-phase voltage, electric current, phase angle, calculate active power, reactive power and power factor, and measuring parameter is sent to the control base plate, can check special change acquisition terminal, negative control terminal, mutual inductor, whether the basic function of concentrator and collector and communication function thereof be normal,

guidance panel provides various patch jacks, splicing ear, supply socket and gauge tap, supply socket is used for providing power supply to system, gauge tap is used for the control system state, patch jack is used for introducing three-phase voltage and three-phase current, splicing ear is used for pulse detection, remote signalling detects, connect forcipated mutual-inductor and communicate by letter with special change acquisition terminal, possess mutual inductor output signal and secondary input end signal measuring ability, guidance panel also is used for connecting low voltage electric power carrier communication module and the infrared communication module of concentrator or collector, be used for the communication function of verification concentrator,

Controlling base plate is connected with guidance panel, this control base plate comprises carrier wave input/output port, keyboard, touch screen control circuit, signal output interface, usb communication circuit and power circuit, function monitoring with special change acquisition terminal, concentrator, collector distribution transformer terminals and negative control terminal can detect AC sampling unit, data transmission unit and the output control unit of these equipment.

Claims (9)

1. field integrated tester of portable electric energy measuring terminal, comprise arithmetic processor (1), arithmetic processor (2), the voltage sample module, the current sample module, gain merit and idle pulse load module, AD converter, display, keyboard, sampling handover module and gain amplification module, described sampling handover module is analog switch, described voltage sample module connects described gain amplification module, this gain amplification module is by described AD converter concatenation operation processor (1), described current sample module connects described analog switch, this analog switch connects described gain amplification module, described gain amplification module is connected to arithmetic processor (1) by described AD converter, the input port of described meritorious and idle pulse load module concatenation operation processor (1), it is characterized in that,
This tester also comprises switching value output module, controls and detect load module, carrier communication module, meritorious and idle pulse output module, and described control detects load module input concatenation operation processor (1), is used for the electrical energy parameter calculation and control; Described arithmetic processor (1) is connected to pulse output module and switching value output module by an output switching module, described pulse output module is used for more, and the high precision instrument metering detects, described switching value output module is used for control signal output and the input of tested facility switching amount, described carrier communication module is connected with described arithmetic processor (1) input, be used for by infrared communication interface, complete the detection of infrared and carrier communication.
2. the field integrated tester of portable electric energy measuring terminal according to claim 1, is characterized in that, this tester also comprises contact control module, and this module connects described arithmetic processor (2).
3. the field integrated tester of portable electric energy measuring terminal according to claim 1; it is characterized in that; described voltage sample module comprises three-phase voltage input signal end, overvoltage protective module and dividing potential drop filtration module; three-phase input voltage is sampled by described dividing potential drop filtration module through after described overvoltage protective module.
4. the field integrated tester of portable electric energy measuring terminal according to claim 1, it is characterized in that, described current sample module comprises current transformer and split core type current transformer, adopts respectively the metal film sampling resistor to sample at described current transformer and split core type current transformer secondary side.
5. the field integrated tester of portable electric energy measuring terminal according to claim 1, it is characterized in that, described gain amplification module is the gear switch module, described gear switch module is the programmable gain amplifier with multiple gain, is used for selecting different gains to amplify as required.
6. the field integrated tester of portable electric energy measuring terminal according to claim 1, is characterized in that, described pulse input and output module adopts the 6N173 High-Speed Coupled Device.
7. the field integrated tester of portable electric energy measuring terminal according to claim 1, is characterized in that, described display adopts the liquid crystal display with touch function.
8. the field integrated tester of portable electric energy measuring terminal according to claim 1, is characterized in that, it is the high speed ARM arithmetic processor of STM32F103VET6 that described arithmetic processor (1) and arithmetic processor (2) adopt model.
9. the field integrated tester of portable electric energy measuring terminal according to claim 5, is characterized in that, described programmable gain amplifier adopts AD526JNZ.
CN201210503041.3A 2012-11-30 2012-11-30 The field integrated tester of a kind of portable electric energy measuring terminal CN103149546B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103424732A (en) * 2013-08-05 2013-12-04 广西电网公司电力科学研究院 Detection device and detection method for direct current electric energy meter
CN104977458A (en) * 2015-07-06 2015-10-14 安徽南瑞中天电力电子有限公司 Battery current detection method of electric energy meter FCT tool
CN105243829A (en) * 2015-09-30 2016-01-13 青岛世泽电子仪表有限公司 Portable simulated meter module
CN106093841A (en) * 2016-08-25 2016-11-09 海盐星创电子有限公司 A kind of hand-held electric energy meter on-site calibrator
CN106249192A (en) * 2016-09-05 2016-12-21 中国电力科学研究院 Detecting system is run at a kind of measuring equipment scene
CN107561478A (en) * 2016-06-30 2018-01-09 湖南东瑞智能仪表有限公司 A kind of electric energy meter complete machine hardware fault automatic detection device and its detection method
CN108109363A (en) * 2018-01-31 2018-06-01 深圳市锦熹科技有限公司 Check instrument and application method in a kind of intelligent electric meter scene based on infrared communication
CN108267705A (en) * 2016-12-30 2018-07-10 武汉市欧睿科技有限公司 Capacitance type potential transformer calibration equipment

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
CN103424732A (en) * 2013-08-05 2013-12-04 广西电网公司电力科学研究院 Detection device and detection method for direct current electric energy meter
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CN104977458A (en) * 2015-07-06 2015-10-14 安徽南瑞中天电力电子有限公司 Battery current detection method of electric energy meter FCT tool
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CN107561478A (en) * 2016-06-30 2018-01-09 湖南东瑞智能仪表有限公司 A kind of electric energy meter complete machine hardware fault automatic detection device and its detection method
CN106093841A (en) * 2016-08-25 2016-11-09 海盐星创电子有限公司 A kind of hand-held electric energy meter on-site calibrator
CN106249192A (en) * 2016-09-05 2016-12-21 中国电力科学研究院 Detecting system is run at a kind of measuring equipment scene
CN106249192B (en) * 2016-09-05 2020-04-24 中国电力科学研究院 Metering equipment field operation detecting system
CN108267705A (en) * 2016-12-30 2018-07-10 武汉市欧睿科技有限公司 Capacitance type potential transformer calibration equipment
CN108109363A (en) * 2018-01-31 2018-06-01 深圳市锦熹科技有限公司 Check instrument and application method in a kind of intelligent electric meter scene based on infrared communication

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