CN104237842A - Alternating voltage test verification device for verifying automatic single-phase kilowatt-hour meter production line - Google Patents
Alternating voltage test verification device for verifying automatic single-phase kilowatt-hour meter production line Download PDFInfo
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- CN104237842A CN104237842A CN201410530991.4A CN201410530991A CN104237842A CN 104237842 A CN104237842 A CN 104237842A CN 201410530991 A CN201410530991 A CN 201410530991A CN 104237842 A CN104237842 A CN 104237842A
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Abstract
The invention discloses an alternating voltage test verification device for verifying an automatic single-phase kilowatt-hour meter production line. The alternating voltage test verification device comprises an insulating shell which is connected with the interior of the insulating shell through terminal blocks. The interior of the insulating shell comprises a resistive voltage division sampling circuit which is used for sampling high-voltage input signals, output signals of the resistive voltage division sampling circuit are transmitted to a measurement and detection unit for measuring the sampled voltage, the measurement and detection unit is communicated with an MCU unit through an SPI (serial peripheral interface), and a measurement value is displayed on a display module controlled by the MCU unit; a power source and a management unit thereof supply power to the MCU unit and the measurement and detection unit. The alternating voltage test verification device is simple, direct, portable and convenient for operators to connect wires, test and read data, and voltage withstanding test efficiency can be improved greatly.
Description
Technical field
The present invention relates to a kind of AC voltage test check device examining and determine robotization single-phase electric energy meter streamline.
Background technology
Voltage resistant instrument belongs to measuring appliance, be mainly used in the instrument of the testing of equipments such as ammeter, collector, terminal between electric power enterprise, between power supply enterprise and user, and standard Hi-pot Tester and check device thereof are the important component parts weighing the equipment withstand voltage properties such as ammeter, collector, terminal.For ensureing that on-the-spot test work is carried out like clockwork smoothly, AC voltage test check device seems particularly important.
At present, international and domesticly also do not test voltage resistant instrument measuring appliance accurately, the accuracy requirement that national grid detects the reliability of ammeter, the precision of ac voltage withstanding instrument is had higher requirement, and the utilization of national automatic assembly line is that AC voltage test check device provides the very large market space.
AC voltage test is the calibrating project that national metrological verification regulations JJG596-2012 specifies, calibrating installation must provide the ac test voltage of 2kV or 4kV at the trial, test period is 1min, for the artificial alternating voltage project by only checking electric energy meter, can be easy to judge and complete test, but to scale multi-epitope automatic calibration single-phase intelligent electric energy meter pipeline system, each epi-position of regulatory requirements all should meet the testing requirements of regulation, when automatically carrying out AC voltage test to electric energy meter, then be difficult to judge whether that all epi-positions all provide trial voltage, the current world and domesticly also do not have similar device.
Summary of the invention
Fundamental purpose of the present invention currently to verify the device that multi-epitope single-phase intelligent electric energy meter does AC voltage test for solving, and provides a kind of AC voltage test check device examining and determine robotization single-phase electric energy meter streamline.
To achieve these goals, apparatus of the present invention adopt following technical scheme:
Examine and determine an AC voltage test check device for robotization single-phase electric energy meter streamline, it comprises an insulation crust; Insulation crust is all connected by connection terminal with its inside; Wherein, insulation crust inside comprises, to the electric resistance partial pressure sample circuit of high input voltage signal sampling, its output signal is sent to gauge check unit and measures sampled voltage, described gauge check unit carries out communication by SPI interface and MCU unit, and described variable shows on the display module of MCU unit controls; Power supply and administrative unit thereof are that MCU unit and gauge check unit are powered.
MCU unit is also connected with infrared communication unit, storage unit, key operation unit and expanding element.
Described electric resistance partial pressure sample circuit, is made up of multiple 300K resistance of connecting in circuit.
Power supply and administrative unit thereof adopt linear stabilized power supply chip RP130N501D, add a backward dioded at the grounding pin of chip RP130N501D.
Contour structures size and the single-phase intelligent electric energy meter of described AC voltage test check device are in the same size.
The test voltage scope of described AC voltage test check device is 1000 ~ 5000V.
The invention has the beneficial effects as follows:
(1) device that this device achieves first to multi-epitope single-phase intelligent electric energy meter does AC voltage test is verified, measuring voltage wide ranges, and measurement device accuracy is high;
(2) test figure is recorded by storer event, time when event comprises test, maximum voltage value, duration;
(3) device is powered simply, is adopted powered battery, and power consumption is little, is approximately 6mA, can record more than 10,000 times and verify test;
(4) apparatus design is light, succinctly, is easy to pipeline system automatic connection, test, storage read data, improves the efficiency of AC voltage test, have good application prospect.
Accompanying drawing explanation
Fig. 1 is the principle of work block diagram of pressure resistant testing device of the present invention;
Fig. 2 is electric resistance partial pressure sample circuit of the present invention;
Fig. 3 is gauge check element circuit of the present invention;
Fig. 4 is power circuit of the present invention;
Fig. 5 is a) infrared transmitting element of the present invention
Fig. 5 b) be infrared receiver of the present invention;
Fig. 6 is connection diagram of the present invention;
Fig. 7 is simulation single-phase electric energy meter structural representation of the present invention;
In figure, A is AC voltage test check device of the present invention, and B is ac voltage withstanding instrument; C is ac voltage withstanding instrument high-pressure side output terminal, D is ac voltage withstanding instrument low-pressure side output terminal, a, b, c, d, e and f are the forceful electric power terminal of AC voltage test check device, g, h, i, j, k and l are the light current terminal of AC voltage test check device, 1 is high-voltage signal input, 2 is electric resistance partial pressure sample circuit, 3 is gauge check unit, 4 is MCU unit, and 5 is infrared communication unit, and 6 is display module, 7 is storage unit, 8 is key operation unit, and 9 is expanding element, and 10 is power supply and administrative unit thereof.
Embodiment
As shown in Figure 1, a kind of AC voltage test check device examining and determine robotization single-phase electric energy meter streamline, it comprises an insulation crust; Insulation crust is all connected by connection terminal with its inside; Wherein, insulation crust inside comprises, to the electric resistance partial pressure sample circuit 2 that high input voltage signal 1 is sampled, its output signal is sent to gauge check unit 3 pairs of sampled voltages and measures, described gauge check unit 3 carries out communication by SPI interface and MCU unit 4, display on the display module 6 that described variable controls at MCU unit 4; Power supply and administrative unit 10 thereof are powered for MCU unit 4 and gauge check unit 3; MCU unit 4 is also connected with infrared communication unit 5, storage unit 7, key operation unit 8 and expanding element 9; Storage unit is used for recording test figure, and records by event, time when described event comprises test, maximum voltage value, duration.
As shown in Figure 2, the electric resistance partial pressure sample circuit that the present invention adopts, is made up of 67 the 300K resistance (20.1M) connected, and its input signal is high-voltage signal input; Output signal end is V3P/V3N, and electric resistance partial pressure sample circuit is connected multiple 300K resistance, and one is the temperature drift impact considering resistance, and two is the dividing potential drop effects considering resistance, and the resistance precision that this device is selected, at below 15ppm, ensure that measuring accuracy.
As shown in Figure 3, the computation chip in gauge check unit of the present invention selects RN8209G; V3P/V3N in RN8209G two pins are the output terminal of input end contact resistance pressure sampling circuit; RN8209G computation chip carries out communication by SPI interface and MCU, and SPI uses 2 control lines and 2 data lines: SCSN, SCLK, SDI and SWI.
Computation chip RN8209G is the anti-electricity-theft the special metering IC of single-phase multifunctional, RN8209G is integrated with three road second order sigma-delta ADC, RN8209G can measure active power, meritorious energy, and two-way independently active power and current effective value, voltage effective value, line frequency, zero passage interruption etc. can be provided simultaneously, RN8209G supports that digital gain, phase place and offset correct.Active energy pulse exports from PF pin, and User Defined electrical energy pulse frequency exports from QF pin.The power supply supervisory circuit of RN8209G inside can ensure to power on and power-off time chip reliably working.In RN8209G, provide abundant software calibration means, not only eliminate the trouble increasing non-essential resistance network, and precision reaches as high as 0.5S level; RN8209G sample voltage value scope is 0 ~ 1V, and when external high pressure is 5000V, sampled voltage 0.25V, when external voltage is 1000V, sampled voltage is 0.05V, all in sample range.
MCU unit, selects FM3308 as kernel control chip.
Computation chip RN8209G and FM3308 carries out communication by SPI interface, and sampled value is shown by display module; FM3308 chip, is configured with the functional module required for exploitation state net intelligent meter, as the I2C interface etc. of LCD driving, RTC real-time clock, 3 UART mouths, hardware.
(1) on hardware, lcd driver and RTC real-time clock are integrated into chip internal by FM3308, improve integrated level;
(2) software section: clock timing is by measuring tempeature and the method compensated ensures that clock accuracy meets the requirements;
(3) data store, and can preserve history voltage, current data, parameters etc.;
(4) event recording function: when comprising power down record, programmed recording, school, record and event reset record etc.;
(5) Presentation Function: the data such as electricity, time, parameter and measured value can be shown.
As shown in Figure 4, the input end of power supply of the present invention and administration module thereof is VIN1, this module uses linear stabilized power supply chip RP130N501D, it is fast that chip has reaction velocity, and output ripple is little, the low noise advantages that work produces, chip output voltage is 5V, in order to lifting output voltage, on chip ground, pin adds a backward dioded M7, and the voltage of its output terminal is then 5.7V.
Fig. 5 is infrared communication unit, and infrared communication unit comprises two parts, as Fig. 5 b) shown in, a part is infrared receiver; As Fig. 5 a) shown in, another part is infrared transmitting element.The present invention selects high efficiency AT205 as power valve, and the infrared remote receiver HM238RL-W of integration is as receiving tube.Photodiode, prime amplifier and detuner are packaged as a whole by HM238RL-W receiver, have the effect receiving infrared signal, built-in signal amplification, 38kHZ filtering, wave test output.
As Fig. 5 a) shown in, infrared transtation mission circuit is made up of triode V25, resistance R66, resistance R67 and sending tube, through debugging after infrared signal exported by single-chip microcomputer pin 18.When sending high level, cut-off, no signal exports; When sending low level, triode ON, infrared sending tube conducting, transmits.
As Fig. 5 b) shown in, the highest output low level of infrared receiver is 0.5V, and minimum output low level is 0V.The highest output high level is 5V, and minimum output high level is 4.5V.Operating voltage is 4.5 ~ 5.5V, and working current is 0.3 ~ 0.6mA.Communication distance 20 meters (level), infrared receiver V24 represents, R63 is current-limiting resistance, and C39 is decoupling capacitor, and C40 is filter capacitor, and capacitance is 22pF.
Do not need externally fed during proving installation test, powered by battery, the CR-P2 battery that battery adopts Wuhan power emerging, cell voltage is 6V, and chip input voltage is provided by battery.Proving installation is considered in low power dissipation design, the capacity 1500mAh of battery, starts battery during voltage-withstand test, and experiment terminates rear closedown battery, and battery power consumption is approximately 6mA, approximately can do 10,000 voltage-withstand tests.
Conveniently whether the voltage of verifying on Hi-pot Tester is added to the single-phase intelligent electric energy meter on inspection surface low waterline exactly, and AC voltage test check device, makes the equirotal contour structures with single-phase intelligent electric energy meter.AC voltage test check device test voltage scope of the present invention is 1000 ~ 5000V, and voltage display retains two-decimal, and precision reaches 0.1%, and electric resistance partial pressure resistance in series is 20.1M Ω, and during test, voltage resistant instrument range of current is at 0.05mA ~ 0.25mA; Do withstand voltage experimental data to be stored by storer event, time when logout comprises experiment, maximum voltage value, duration at every turn, can split screen display.
Using method of the present invention is:
Before dispatching from the factory, after AC voltage test check device corrects with standard source, precision can reach 0.1%, very accurately.During streamline automatic calibration single-phase intelligent electric energy meter, do this project of withstand voltage test, alternating voltage check device is put on withstand voltage verification table together with intelligent electric energy meter, do the withstand voltage test of 4KV, the time of the time that the magnitude of voltage that alternating voltage check device can record withstand voltage test occurs and voltage keeps simultaneously.Voltage resistant instrument dispatches from the factory time error within 5%, when single-phase intelligent electric energy meter does Hi-pot Tester, magnitude of voltage generally adds the voltage of 4KV, difference about 400V between maxima and minima, test very inaccurate, so relative to voltage resistant instrument, AC voltage test check device is just equivalent to one " standard source ", and whether verifying Hi-pot Tester, to be added to the withstand voltage of single-phase electric energy meter accurate.
As shown in Figure 6, ac voltage withstanding instrument high-pressure side output terminal C, is connected on the forceful electric power terminal of AC voltage test check device; Ac voltage withstanding instrument low-pressure side output terminal D, is connected to the light current terminal of AC voltage test check device.
As shown in Figure 7, AC voltage test check device simulation single-phase electric energy list structure, wherein forceful electric power terminal a, b, c, d, e and f of AC voltage test check device, be connected on the high-pressure side of voltage resistant instrument, light current terminal g, h, i, j, k and l of AC voltage test check device, be connected on the low-pressure side of voltage resistant instrument.
AC voltage test check device adds standard source after overcorrect, the output voltage precision extracting 15 check devices is as shown in table 1 below: the sequence number extracting check device is shown in the 1st list, the output voltage of standard source is shown in 2nd list, the output voltage of check device is shown in 3rd list, and relative error (%) is shown in the 4th list.
Table 1 extracts the output voltage precision of 15 check devices
Claims (6)
1. examine and determine an AC voltage test check device for robotization single-phase electric energy meter streamline, it is characterized in that, it comprises an insulation crust; Insulation crust is all connected by connection terminal with its inside; Wherein, insulation crust inside comprises, to the electric resistance partial pressure sample circuit of high input voltage signal sampling, its output signal is sent to gauge check unit and measures sampled voltage, described gauge check unit carries out communication by SPI interface and MCU unit, and described variable shows on the display module of MCU unit controls; Power supply and administrative unit thereof are that MCU unit and gauge check unit are powered.
2. a kind of AC voltage test check device examining and determine robotization single-phase electric energy meter streamline as claimed in claim 1, is characterized in that, MCU unit is also that storage unit, key operation unit and expanding element are connected with infrared communication unit.
3. a kind of AC voltage test check device examining and determine robotization single-phase electric energy meter streamline as claimed in claim 1, is characterized in that, described electric resistance partial pressure sample circuit, is made up of multiple 300K resistance of connecting in circuit.
4. a kind of AC voltage test check device examining and determine robotization single-phase electric energy meter streamline as claimed in claim 1, it is characterized in that, power supply and administrative unit thereof adopt linear stabilized power supply chip RP130N501D, add a backward dioded at the grounding pin of chip RP130N501D.
5. a kind of AC voltage test check device examining and determine robotization single-phase electric energy meter streamline as claimed in claim 1, is characterized in that, contour structures size and the single-phase intelligent electric energy meter of described AC voltage test check device are in the same size.
6. a kind of AC voltage test check device examining and determine robotization single-phase electric energy meter streamline as claimed in claim 1, is characterized in that, the test voltage scope of described AC voltage test check device is 1000 ~ 5000V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410530991.4A CN104237842A (en) | 2014-10-10 | 2014-10-10 | Alternating voltage test verification device for verifying automatic single-phase kilowatt-hour meter production line |
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| CN201410530991.4A CN104237842A (en) | 2014-10-10 | 2014-10-10 | Alternating voltage test verification device for verifying automatic single-phase kilowatt-hour meter production line |
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Cited By (2)
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| CN105223538A (en) * | 2015-11-13 | 2016-01-06 | 国家电网公司 | For pick-up unit and the quality control method of electric energy meter automatic Verification streamline |
| CN106066464A (en) * | 2016-06-13 | 2016-11-02 | 国网江苏省电力公司电力科学研究院 | A kind of check standard device for electric energy meter Withstand test device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106066464A (en) * | 2016-06-13 | 2016-11-02 | 国网江苏省电力公司电力科学研究院 | A kind of check standard device for electric energy meter Withstand test device |
| CN106066464B (en) * | 2016-06-13 | 2018-11-06 | 国网江苏省电力公司电力科学研究院 | A kind of check standard device for electric energy meter Withstand test device |
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