CN102466757A - High precision voltage and current testing device - Google Patents
High precision voltage and current testing device Download PDFInfo
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- CN102466757A CN102466757A CN 201010548185 CN201010548185A CN102466757A CN 102466757 A CN102466757 A CN 102466757A CN 201010548185 CN201010548185 CN 201010548185 CN 201010548185 A CN201010548185 A CN 201010548185A CN 102466757 A CN102466757 A CN 102466757A
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Abstract
The invention discloses a high precision voltage and current testing device, comprising a voltage mutual inductor, a current mutual inductor, an A/D switching module connected with the voltage mutual inductor and the current mutual inductor respectively, a controller and a display unit, further comprising a parameter input unit for inputting the working resistance and the predetermined alarm threshold value of the tested power device, a conversion module of theoretical working current, a conversion module of theoretical working voltage, a comparison module of voltage difference, a comparison module of current difference and an alarm prompting unit for controlling the alarm by a controller via combining with the predetermined alarm threshold value according to the difference comparison result of the comparison module of voltage difference and the comparison module of current difference. The high precision voltage and current testing device has reasonable design, convenient installation and arrangement, simple and convenient use and operation, high intelligence degree and good use effects, and effectively solves many actual problems that the traditional voltage and current testing device has lower testing precision, does not have error testing and judging function, and has lower intelligence degree and the like.
Description
Technical field
The invention belongs to voltage, electric current test technology field, especially relate to a kind of high-accuracy voltage, current testing device.
Background technology
In daily life field, along with the progress and the reach of science of society, various household electrical appliance have become requisite ingredient in people's daily life at present.Simultaneously; Aspect industry, agricultural production, production equipment and Work machine are all realized full-automatic control basically, thereby power device has become a vital ingredient in industry, agricultural and the daily life; We can say; Inseparable between people's daily production, life and the various types of power devices, lack power device after, people's daily productive life then can't be normally, carry out in order.Nowadays at present; Convenient, fast, while efficiently that people are enjoying that various household electrical appliance, production equipment and Work machine brought; Can also pay special attention to according to the operate as normal problem of setting working method all kinds of power devices; And can carry out operate as normal by setting working method in order to ensure all kinds of power devices, then need the WV and the working current of each power device are accurately detected.
Nowadays at present; WV that is adopted on the market and working current pick-up unit all are to adopt a voltage transformer (VT) and a current transformer respectively the WV and the working current of power device to be detected in real time respectively mostly; And the information synchronization that is detected is sent to controller; And control is not done any processing after institute's detection signal discerned, just with the information that detected real work voltage and the real work electric current as power device to be detected under the work at present state.But in the actual detected process, the factor that influences voltage transformer (VT) summation current transformer accuracy of detection is very many, thereby all there are the not high multiple practical problems of lower, the intelligent degree of accuracy of detection to some extent in above-mentioned existing voltage, current sensing means.
Summary of the invention
Technical matters to be solved by this invention is to above-mentioned deficiency of the prior art; A kind of high-accuracy voltage, current testing device are provided; It is reasonable in design, install lay convenient, use that easy and simple to handle and intelligent degree is high, result of use is good, can effectively solve the accuracy of detection that existing voltage, current sensing means exists lower, do not have error-detecting and arbitration functions, not high multiple practical problems of intelligent degree.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: a kind of high-accuracy voltage, current testing device; The current transformer that comprises voltage transformer (VT) that the WV to power device to be tested detects in real time, the working current of power device to be tested is detected in real time, the A/D modular converter that joins with the voltage transformer (VT) summation current transformer respectively and controller that joins with the A/D modular converter and the display unit that joins with controller; It is characterized in that: also comprise the parameter input unit that is used to import the operating resistance of power device to be detected and predetermined alarm threshold value, according to the operating resistance of actual voltage value that voltage transformer (VT) detected and power device to be detected convert the theoretical work electric current conversion module that draws the theoretical work electric current the work at present state under, according to the actual current value and the operating resistance of power device to be detected that current transformer detected convert the theoretical work voltage conversion module that draws the theoretical work voltage under the work at present state, to magnitude of voltage that voltage transformer (VT) detects and theoretical work voltage conversion module convert the theoretical voltage value that draws carry out the difference comparison the voltage difference comparison module, magnitude of voltage that current transformer detects and the theoretical work electric current conversion module theoretical current value that draws that converts is carried out the electric current difference comparison module of difference comparison and is also combined be scheduled to alarm unit that alarm threshold value carry out controlling alarm according to the voltage difference comparison module with the difference comparative result of electric current difference comparison module by controller; Said parameter input unit, theoretical work electric current conversion module, theoretical work voltage conversion module, voltage difference comparison module, electric current difference comparison module and alarm unit all join with controller; Said A/D modular converter and theoretical work voltage conversion module are all joined with the voltage difference comparison module, and said A/D modular converter and theoretical work electric current conversion module are all joined with electric current difference comparison module.
Above-mentioned a kind of high-accuracy voltage, current testing device is characterized in that: comprise also and join with controller and controller is inserted the network insertion device of internet that said controller carries out two-way communication through network insertion device and the webserver and upper monitoring machine.
Above-mentioned a kind of high-accuracy voltage, current testing device is characterized in that: said controller is the ARM microprocessor.
Above-mentioned a kind of high-accuracy voltage, current testing device is characterized in that: also comprise all the clock circuit and the storage unit of joining with controller.
Above-mentioned a kind of high-accuracy voltage, current testing device is characterized in that: said parameter input unit and display unit are integrated into touching display screen.
The present invention compared with prior art has the following advantages:
1, reasonable in design, cost is low and install to lay convenient.
2, the simple and easy-to-connect of circuit.
3, use simple to operate, intelligent degree height and display effect directly perceived, can realize all controlling process automatically through controller.
4, result of use is good, before the use, imports the operating resistance and the predetermined alarm threshold value (comprising current detecting error alarm threshold value and voltage detecting error alarm threshold value) of power device to be detected earlier through parameter input unit; In the actual use; The present invention through the voltage transformer (VT) summation current transformer respectively to the WV of power device to be tested and working current detects in real time and transfer digital signal to through the A/D modular converter after be sent to controller; Controller calls theoretical work electric current conversion module respectively and converts according to the operating resistance of actual voltage value that voltage transformer (VT) detected and power device to be detected and draw the theoretical work electric current under the work at present state afterwards; Simultaneously controller calls theoretical work voltage conversion module and draws the theoretical work voltage under the work at present state according to the operating resistance conversion of actual current value that current transformer detected and power device to be detected; Controller calls the voltage difference comparison module the convert theoretical voltage value that draws of magnitude of voltage that voltage transformer (VT) detects and theoretical work voltage conversion module is carried out difference relatively and with voltage difference comparative result (being the voltage detecting error) synchronous driving to controller afterwards; Simultaneously controller calls electric current difference comparison module the convert theoretical current value that draws of magnitude of voltage that current transformer detects and theoretical work electric current conversion module is carried out difference relatively and with electric current difference comparative result (being the current detecting error) synchronous driving to controller, also combines be scheduled to alarm unit that alarm threshold value carry out controlling alarm according to the voltage difference comparison module with the difference comparative result of electric current difference comparison module by controller.Like this; Can effectively avoid the detection error of voltage transformer (VT) summation current transformer; Be equivalent to voltage transformer (VT) summation current transformer institute detection signal is carried out the first-order error diagnosis respectively; Reasonable in design and realize conveniently, then report to the police when error surpasses predefined alarm threshold value when detecting, improved the accuracy of detection of voltage, electric current so greatly.
5, practical value is high, and use occasion is not limit.
6, applied widely and popularizing application prospect is extensive.
In sum; The present invention is reasonable in design, install lay convenient, use that easy and simple to handle and intelligent degree is high, result of use is good, can effectively solve the accuracy of detection that existing voltage, current sensing means exists lower, do not have error-detecting and arbitration functions, not high multiple practical problems of intelligent degree.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present invention.
Description of reference numerals:
The 1-voltage transformer (VT); The 2-current transformer; The 3-A/D modular converter;
The 4-controller; The 5-display unit; The 6-parameter input unit;
7-theoretical work electric current conversion mould 8-theoretical work voltage changes 9-voltage difference comparison module;
Piece; Calculate module;
10-electric current difference comparison module; 11-alarm unit; 12-network insertion device;
The 13-webserver; 14-upper monitoring machine; The 15-clock circuit;
The 16-storage unit;
Embodiment
As shown in Figure 1, the current transformer 2 that the present invention includes voltage transformer (VT) 1 that the WV to power device to be tested detects in real time, the working current of power device to be tested is detected in real time, the A/D modular converter 3 that joins with voltage transformer (VT) 1 summation current transformer 2 respectively and controller 4 that joins with A/D modular converter 3 and the display unit 5 that joins with controller 4.Simultaneously; The actual current value and the operating resistance of power device to be detected that the actual voltage value and the operating resistance of power device to be detected that the present invention also comprises the parameter input unit 6 that is used to import the operating resistance of power device to be detected and predetermined alarm threshold value, detected according to voltage transformer (VT) 1 convert the theoretical work electric current conversion module 7 that draws the theoretical work electric current the work at present state under, detected according to current transformer 2 converts, and the theoretical work voltage conversion module 8 that draws the theoretical work voltage under the work at present state, 8 conversions draw to voltage transformer (VT) 1 magnitude of voltage that detects and theoretical work voltage conversion module theoretical voltage value are carried out the voltage difference comparison module 9 of difference comparison, the theoretical current value that 7 conversions draw to current transformer 2 magnitude of voltage that detects and theoretical work electric current conversion module is carried out the electric current difference comparison module 10 of difference comparison and also combined be scheduled to alarm unit 11 that alarm threshold value carry out controlling alarm according to voltage difference comparison module 9 with the difference comparative result of electric current difference comparison module 10 by controller 4; Said parameter input unit 6, theoretical work electric current conversion module 7, theoretical work voltage conversion module 8, voltage difference comparison module 9, electric current difference comparison module 10 and alarm unit 11 all join with controller 4; Said A/D modular converter 3 all joins with voltage difference comparison module 9 with theoretical work voltage conversion module 8, and said A/D modular converter 3 all joins with electric current difference comparison module 10 with theoretical work electric current conversion module 7.
In the present embodiment, for making things convenient for remote monitoring, the present invention also comprises joins with controller 4 and with the network insertion device 12 of controller 4 access internets, said controller 4 carries out two-way communication through network insertion device 12 and the webserver 13 and upper monitoring machine 14.
In the present embodiment, said controller 4 is the ARM microprocessor.Simultaneously, the present invention also comprises all the clock circuit 15 and storage unit 16 that joins with controller 4.Be handled easily, said parameter input unit 6 is integrated into touching display screen with display unit 5.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any restriction, every technical spirit changes any simple modification, change and the equivalent structure that above embodiment did according to the present invention, all still belongs in the protection domain of technical scheme of the present invention.
Claims (5)
1. a high-accuracy voltage, current testing device; The current transformer (2) that comprises voltage transformer (VT) (1) that the WV to power device to be tested detects in real time, the working current of power device to be tested is detected in real time, the A/D modular converter (3) that joins with voltage transformer (VT) (1) summation current transformer (2) respectively and controller (4) that joins with A/D modular converter (3) and the display unit (5) that joins with controller (4); It is characterized in that: the actual current value and the operating resistance of power device to be detected that the actual voltage value and the operating resistance of power device to be detected that also comprise the parameter input unit (6) of the operating resistance with the predetermined alarm threshold value that are used to import power device to be detected, is detected according to voltage transformer (VT) (1) convert the theoretical work electric current conversion module (7) that draws the theoretical work electric current the work at present state under, detected according to current transformer (2) convert the theoretical work voltage conversion module (8) that draws the theoretical work voltage the work at present state under, the convert theoretical voltage value that draws of voltage transformer (VT) (1) magnitude of voltage that detects and theoretical work voltage conversion module (8) is carried out voltage difference comparison module (9) that difference compares, the convert theoretical current value that draws of current transformer (2) magnitude of voltage that detects and theoretical work electric current conversion module (7) is carried out electric current difference comparison module (10) that difference compares and also combined be scheduled to alarm unit (11) that alarm threshold value carry out controlling alarm according to voltage difference comparison module (9) with the difference comparative result of electric current difference comparison module (10) by controller (4); Said parameter input unit (6), theoretical work electric current conversion module (7), theoretical work voltage conversion module (8), voltage difference comparison module (9), electric current difference comparison module (10) and alarm unit (11) all join with controller (4); Said A/D modular converter (3) and theoretical work voltage conversion module (8) are all joined with voltage difference comparison module (9), and said A/D modular converter (3) and theoretical work electric current conversion module (7) are all joined with electric current difference comparison module (10).
2. according to the described a kind of high-accuracy voltage of claim 1, current testing device; It is characterized in that: comprise also and join with controller (4) and controller (4) is inserted the network insertion device (12) of internet that said controller (4) carries out two-way communication through network insertion device (12) and the webserver (13) and upper monitoring machine (14).
3. according to claim 1 or 2 described a kind of high-accuracy voltages, current testing device, it is characterized in that: said controller (4) is the ARM microprocessor.
4. according to claim 1 or 2 described a kind of high-accuracy voltages, current testing device, it is characterized in that: also comprise all the clock circuit (15) and the storage unit (16) of joining with controller (4).
5. according to claim 1 or 2 described a kind of high-accuracy voltages, current testing device, it is characterized in that: said parameter input unit (6) and display unit (5) are integrated into touching display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010548185 CN102466757A (en) | 2010-11-18 | 2010-11-18 | High precision voltage and current testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010548185 CN102466757A (en) | 2010-11-18 | 2010-11-18 | High precision voltage and current testing device |
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| Publication Number | Publication Date |
|---|---|
| CN102466757A true CN102466757A (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010548185 Pending CN102466757A (en) | 2010-11-18 | 2010-11-18 | High precision voltage and current testing device |
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| CN (1) | CN102466757A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675710A (en) * | 2012-09-24 | 2014-03-26 | 温州市科星电子有限公司 | Alarm device for AC flowing into DC power supply for substation |
| CN104283512A (en) * | 2014-10-28 | 2015-01-14 | 上海许继电气有限公司 | Method for remotely monitoring and locating faults of set strings in photovoltaic power station system |
| WO2018107987A1 (en) * | 2016-12-16 | 2018-06-21 | 联合汽车电子有限公司 | Current detection device, current detection system and current detection method |
| CN108255658A (en) * | 2016-12-28 | 2018-07-06 | 天津正初科技有限公司 | A kind of light current intelligent monitoring early warning system for computer |
-
2010
- 2010-11-18 CN CN 201010548185 patent/CN102466757A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675710A (en) * | 2012-09-24 | 2014-03-26 | 温州市科星电子有限公司 | Alarm device for AC flowing into DC power supply for substation |
| CN104283512A (en) * | 2014-10-28 | 2015-01-14 | 上海许继电气有限公司 | Method for remotely monitoring and locating faults of set strings in photovoltaic power station system |
| CN104283512B (en) * | 2014-10-28 | 2017-02-01 | 上海许继电气有限公司 | Method for remotely monitoring and locating faults of set strings in photovoltaic power station system |
| WO2018107987A1 (en) * | 2016-12-16 | 2018-06-21 | 联合汽车电子有限公司 | Current detection device, current detection system and current detection method |
| CN108255658A (en) * | 2016-12-28 | 2018-07-06 | 天津正初科技有限公司 | A kind of light current intelligent monitoring early warning system for computer |
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Application publication date: 20120523 |