CN211086576U - Power consumption tester for portable single-phase electric energy meter - Google Patents
Power consumption tester for portable single-phase electric energy meter Download PDFInfo
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- CN211086576U CN211086576U CN201822025971.8U CN201822025971U CN211086576U CN 211086576 U CN211086576 U CN 211086576U CN 201822025971 U CN201822025971 U CN 201822025971U CN 211086576 U CN211086576 U CN 211086576U
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Abstract
The utility model provides a portable single-phase electric energy meter power consumption tester, including the signal source, the voltage power module, the current power module, carrier communication module, 485 communication module, control switch, current transformer, 8 terminals, voltage coil signal acquisition operation module, current coil signal acquisition operation module, ARM control platform, electric energy meter 485 interface, current coil power consumption pincers interface, voltage coil power consumption pincers interface, RS232 ethernet communication port, control keyboard, L CD display screen.
Description
Technical Field
The utility model relates to a measuring device of single-phase electric energy meter power consumption parameter, concretely relates to portable single-phase electric energy meter power consumption tester.
Background
The measurement of the power consumption of the single-phase electric energy meter is widely used at present, an integrally designed power consumption measurement circuit module is embedded in an electric energy meter calibrating device, the circuit module integrates voltage coil power consumption measurement, current coil power consumption measurement, units responsible for calculation and the like, the measurement is adopted by professional metering departments and general industrial enterprises, and the measurement becomes a common technical means for measuring the power consumption of the electric energy meter of all relevant units. DSP (digital signal processor) number inside power consumption measuring circuit module of single-phase electric energy meterThe signal processor carries out digital sampling through the A/D converter, and voltage and current effective values, active power and reactive power values can be obtained after a series of mathematical operations are carried out. The active power calculation formula under the condition of fundamental wave is as follows:
the reactive power calculation formula is as follows:
in the formula, U is the effective value of the voltage obtained by calculation, I is the effective value of the current obtained by calculation,
for inputting AC voltage vector U&Sum current vector I&The phase angle therebetween.
However, the power consumption measuring circuit module of the conventional single-phase electric energy meter still has inconvenience in practical application of measurement laboratories and field verification. On one hand, although the integrated design structure has a cost-saving and simple circuit, the actual power consumption of the single-phase electric energy meter cannot be accurately judged due to large measurement errors introduced by voltage coil measurement and current coil measurement, and the accuracy of the voltage unit and the accuracy of the current input unit cannot be independently corrected, namely, the uncertainty of each circuit unit cannot be independently determined. When the instrument is detected, the whole calibration is carried out on the whole instrument without a convenient interface connection and traceable correction method, and only the error range of the module can be given. Therefore, higher requirements are provided for the precision and stability of the power consumption measuring circuit module of the single-phase electric energy meter, and the accuracy grade of the power consumption measuring circuit module of the single-phase electric energy meter is limited, so that higher accuracy grade is difficult to provide.
On the other hand, the power consumption measuring circuit module of the existing single-phase electric energy meter has an integrated design structure, so that the stricter the requirement on environmental conditions is, the electric energy meter can be normally used only by being attached to an electric energy meter calibrating device, and the electric energy meter measuring circuit module cannot be carried in a portable mode and is not suitable for being used as a daily working instrument by a basic unit. And the maximum power consumption in the carrier communication and 485 communication states cannot be judged.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a portable single-phase electric energy meter power consumption tester, which can be flexibly and conveniently combined and used in the laboratory and the field environment by carrying out structural design on the connection of the internal circuit unit of the single-phase electric energy meter power consumption tester; the voltage coil measuring circuit unit and the current coil measuring circuit unit can be calibrated and verified independently, and the calibration precision is high; meanwhile, the tester can internally generate single-phase voltage and current power output signals, so that the power consumption of the single-phase electric energy meter can be conveniently measured without depending on the power output of an electric energy meter calibrating device; the tester can be used independently or combined together, can generate carrier and 485 communication signals, and can respectively measure the power consumption conditions of the single-phase electric energy meter in the carrier communication and 485 communication states.
In order to achieve the purpose, the power consumption tester comprises a signal source, a voltage power module, a current power module, a carrier communication module, a 485 communication module, a control switch, a current transformer, 8 terminals, a voltage coil signal acquisition and operation module, a current coil signal acquisition and operation module, an ARM control platform, an electric energy meter 485 interface, a current coil power consumption clamp interface, a voltage coil power consumption clamp interface, an RS232 Ethernet communication port, a control keyboard KEY and an L CD display screen, wherein the output end of the signal source is respectively connected with the input ends of the voltage power module and the current power module, the output end of the voltage power module is respectively connected with a second terminal and a third terminal, the first control switch and the first terminal are sequentially connected between the voltage power module and the second terminal, the output end of the current power module is respectively connected with the fifth terminal and the sixth terminal, the second control switch and the fourth terminal are sequentially connected between the current power module and the fifth terminal, the first current transformer is connected between the first terminal and the second terminal, the output end of the voltage coil signal acquisition and the second terminal, the third terminal are respectively connected with the current power module, the current power module and the current power module, the current power module are respectively connected with the current power module, the current transformer is connected with the second terminal, the current transformer is connected with the current transformer, the current.
The signal source adopts a DDS high-precision digital signal generation integrated circuit.
The voltage power module adopts an AB type linear analog power amplifying circuit.
The current power module adopts an AB type linear analog power amplifying circuit.
The carrier communication module adopts a force fit micro, east soft or ancient cooking vessel communication general type carrier control module.
And the voltage coil signal acquisition and operation module adopts an integrated circuit which is formed by integrating and packaging an MCU and a DSP.
The current coil signal acquisition and operation module adopts an integrated circuit which is integrated and packaged by an MCU and a DSP.
The ARM control platform adopts M4 series chips.
The utility model discloses following beneficial effect has:
(1) the voltage and current measuring device integrates a signal source, voltage and power output, current and power output, voltage coil acquisition input calculation, current coil acquisition input calculation, correction display and an external measuring interface, and can be used for separately calibrating and verifying the voltage and the current, so that the measuring precision is improved.
(2) The device has the functions of switching multi-channel carrier modules and testing 485 communication, can continuously measure the power loss of the single-phase electric energy meter within a period of time, and calculates the maximum value, the minimum value and the average value of the power consumption.
(3) The input voltage of the current coil directly acquires the voltage drop of the current coil, so that the influence of the voltage drop of the contact terminal on measurement is avoided, and the accuracy of the voltage measurement of the current coil is improved.
(4) The external power consumption test clamp interface can be independently used, can be combined for use and can also be independently used, and convenience is provided for on-site on-line monitoring.
Drawings
Fig. 1 is a schematic circuit diagram of a power consumption tester of a portable single-phase electric energy meter according to the present invention;
fig. 2 is the utility model discloses a voltage coil signal acquisition operation module and current coil signal acquisition operation module's of portable single-phase electric energy meter power consumption tester functional block diagram.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in FIG. 1, the power consumption tester for the portable single-phase electric energy meter comprises a signal source, a voltage power module, a current power module, a carrier communication module, a 485 communication module, a control switch, a current transformer, 8 terminals, a voltage coil signal acquisition and calculation module, a current coil signal acquisition and calculation module, an ARM control platform, an electric energy meter 485 interface, a current coil power consumption clamp interface, a voltage coil power consumption clamp interface, an RS232 Ethernet communication port, a control keyboard KEY and a L CD display screen, wherein the output end of the signal source is respectively connected with the input ends of the voltage power module and the current power module, the output end of the voltage power module is respectively connected with a second terminal L and a third terminal L, a first control switch K1 and a first terminal L0 are sequentially connected between the voltage power module and a second terminal L, the output end of the current power module is respectively connected with a fifth terminal L and a sixth terminal ⑥, the output end of the current power module is respectively connected with a fifth terminal 4624 and a sixth terminal 36635 and a sixth terminal 365735, the output end of the second control switch K2 and a second control switch, a second terminal K L and a second terminal 867 are respectively connected with the input end of the current power module, the current coil power module, the input end of the ARM power module, the current coil is respectively connected with the current coil 94 and the current coil 94 a current coil, the current coil is respectively connected with the input end of the current coil 94 communication module, the current coil of the ARM control platform, the ARM coil is respectively connected with the ARM coil 99, the ARM coil is connected with the ARM coil 99, the current coil 99, the ARM coil 99, the current coil is connected with the ARM coil, the ARM coil 99, the ARM coil 99, the current coil is connected with the ARM coil, the ARM coil 99.
The signal source adopts a DDS high-precision digital signal generation integrated circuit, and the preferred model is AD 9833.
The voltage power module adopts an AB type linear analog power amplifying circuit, and the preferred model is GENY _ AMP.
The current power module adopts an AB type linear analog power amplifying circuit, and the preferred model is GENY _ AMP.
The carrier communication module adopts a universal carrier control module for force combining, east soft or ancient cooking letter, and the optimal types are L M6298, L M6298 or TOPSCOMM narrow band and broadband respectively.
The voltage coil signal acquisition and operation module is an integrated circuit which is integrated and packaged by an MCU and a DSP, and the preferred model is GENY 8209D.
The current coil signal acquisition and operation module is an integrated circuit which is integrated and packaged by an MCU and a DSP, and the preferred model is GENY 8209D.
The ARM control platform adopts an M4 series chip, and the preferred model is STM32F 407.
As shown in FIG. 2, the alternating current voltage PGA comparator is a two-way input high-precision small signal preprocessor, provides two ∑ - △ ADC circuits, supports IEC62053-22:2003 standard requirements, provides voltage, current effective value, active power and voltage frequency measurement, provides phase and effective value correction functions, provides a serial interface and an electric energy reading trigger function, and can comprehensively measure the power frequency and alternating current comprehensive parameter power and electric energy of the coil.
The utility model discloses a portable single-phase electric energy meter power consumption tester's theory of operation is, first step, operating personnel according to the suggestion of L CD display screen, input test parameter through control keyboard KEY, second step, ARM control platform sets for the parameter according to operating personnel and is connected to the signal source through the data line, and control signal source produces power frequency AC voltage signal and the power frequency AC current signal of corresponding amplitude, the power frequency AC signal that the signal source produced is carried voltage power module respectively through output end connecting wire, the input of current power module, third step, voltage power module is connected to second terminal ② from the output after carrying out power amplification to power frequency AC voltage signal, third terminal ③ provides the voltage power signal for the electric energy meter voltage coil, current power module is carried out power amplification to power frequency AC current signal and is connected to fifth terminal ⑤ from the output, sixth terminal ⑥ provides the current power signal for the electric energy meter current coil, fourth step, the synchronous generation carrier wave or 485 signal is transmitted to 485 communication module or carrier wave communication module through the line, the electric energy meter voltage coil is connected by the output terminal 485, the carrier wave power coil is connected through the data acquisition control module, the DSP obtains the data acquisition data line through the test data line, the data acquisition control platform, the ARM is carried the ARM, the ARM data acquisition module, the ARM data acquisition module, the ARM is carried the ARM, the ARM data acquisition module, the ARM control platform passes through the ARM, the ARM data acquisition module, the ARM data acquisition.
The utility model has the advantages of it is following:
(1) the current coil acquisition circuit is provided with independent terminals comprising a seventh terminal ⑦ and an eighth terminal ⑧, so that the influence of resistance voltage drop of a current loop terminal on the voltage drop of a current coil is reduced by independently introducing current test voltage, and the two sockets are specially connected to the current coil terminal closest to the single-phase electric energy meter through external lead terminals.
(2) The voltage coil and the current coil can be used for providing a stable power signal test internally and can also be used for an external power supply test, namely K1 and K2 switch control in figure 1.
(3) The voltage coil and the current coil are respectively and independently collected and operated, so that mutual interference of a voltage loop and a current loop is avoided, and an independent electric quantity operation module is adopted.
(4) A metrological verification terminal is introduced, the first terminal ① and the fourth terminal ④ are connected with the ② ③ ⑤ sixth ① 0 ① 1 terminal in a matching mode, a traceable correction function is achieved for a power consumption meter, conditions are provided for equipment metrological verification, a national approved standard source method testing method is adopted, standard current is introduced into the first terminal ① and the second terminal, the accuracy of a voltage coil loop can be measured by injecting standard voltage into the first terminal ① and the third terminal, the standard source method testing method is also adopted, the standard current is introduced into the fourth terminal ④ and the fifth terminal, the accuracy of a current coil loop can be measured by injecting standard voltage into the seventh terminal ④ and the eighth terminal, and electrical parameters of the two loops can be directly displayed on a L CD display screen and output through a communication interface, so that independent calibration and independent use of a voltage coil and a current coil circuit unit can be achieved.
(5) The power consumption test device has a carrier communication function, can generate a plurality of paths of carrier switching communication signals and 485 communication signals in an off-line manner, and can test the power consumption conditions of the single-phase electric energy meter in a communication state within a period of time, including a maximum value, a minimum value and an average power value.
(6) The power consumption testing clamp has an external power consumption testing clamp interface, and provides a convenient interface for monitoring the power consumption of the single-phase electric energy meter running on a line on site on line. This circuit configuration makes it possible for an apparatus to look like an apparatus that can be flexibly combined for portability from an external function.
Claims (8)
1. A power consumption tester of a portable single-phase electric energy meter is characterized by comprising a signal source, a voltage power module, a current power module, a carrier communication module, a 485 communication module, a control switch, a current transformer, 8 terminals, a voltage coil signal acquisition and operation module, a current coil signal acquisition and operation module, an ARM control platform, an electric energy meter 485 interface, a current coil power consumption clamp interface, a voltage coil power consumption clamp interface, an RS232 Ethernet communication port, a control keyboard and an L CD display screen, wherein the output end of the signal source is connected with the input ends of the voltage power module and the current power module respectively, the output end of the voltage power module is connected with the second terminal and the third terminal respectively, the first control switch and the first terminal are sequentially connected between the voltage power module and the second terminal, the output end of the current power module is connected with the fifth terminal and the sixth terminal respectively, the second control switch and the fourth terminal are sequentially connected between the current power module and the fifth terminal, the first current transformer is connected between the first terminal and the second terminal, the second terminal and the second terminal, the third terminal are connected with the input end of the current coil signal acquisition and operation module, the input end of the ARM control module are connected with the power consumption clamp interface of the current power module, the current coil signal acquisition and the current clamp interface of the current clamp interface, the ARM control module, the current clamp interface of the ARM control module are connected with the output end of the current clamp interface, the ARM control module, the ARM control interface of the ARM control module, the ARM control platform, the ARM control interface of the ARM control interface, the ARM control module, the ARM control interface of the ARM control interface, the ARM control interface of the ARM control module, the ARM.
2. The power consumption tester of the portable single-phase electric energy meter according to claim 1, characterized in that: the signal source adopts a DDS high-precision digital signal generation integrated circuit.
3. The power consumption tester of the portable single-phase electric energy meter according to claim 1, characterized in that: the voltage power module adopts an AB type linear analog power amplifying circuit.
4. The power consumption tester of the portable single-phase electric energy meter according to claim 1, characterized in that: the current power module adopts an AB type linear analog power amplifying circuit.
5. The power consumption tester of the portable single-phase electric energy meter according to claim 1, characterized in that: the carrier communication module adopts a force fit micro, east soft or ancient cooking vessel communication general type carrier control module.
6. The power consumption tester of the portable single-phase electric energy meter according to claim 1, characterized in that: and the voltage coil signal acquisition and operation module adopts an integrated circuit which is formed by integrating and packaging an MCU and a DSP.
7. The power consumption tester of the portable single-phase electric energy meter according to claim 1, characterized in that: the current coil signal acquisition and operation module adopts an integrated circuit which is integrated and packaged by an MCU and a DSP.
8. The power consumption tester of the portable single-phase electric energy meter according to claim 1, characterized in that: the ARM control platform adopts M4 series chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822025971.8U CN211086576U (en) | 2018-12-04 | 2018-12-04 | Power consumption tester for portable single-phase electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822025971.8U CN211086576U (en) | 2018-12-04 | 2018-12-04 | Power consumption tester for portable single-phase electric energy meter |
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| Publication Number | Publication Date |
|---|---|
| CN211086576U true CN211086576U (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822025971.8U Expired - Fee Related CN211086576U (en) | 2018-12-04 | 2018-12-04 | Power consumption tester for portable single-phase electric energy meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630528A (en) * | 2020-12-15 | 2021-04-09 | 广西电网有限责任公司南宁供电局 | Miniature multi-functional consumption tester |
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2018
- 2018-12-04 CN CN201822025971.8U patent/CN211086576U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630528A (en) * | 2020-12-15 | 2021-04-09 | 广西电网有限责任公司南宁供电局 | Miniature multi-functional consumption tester |
| CN112630528B (en) * | 2020-12-15 | 2023-06-13 | 广西电网有限责任公司南宁供电局 | Miniature multifunctional power consumption tester |
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| CF01 | Termination of patent right due to non-payment of annual fee |