CN86208293U - Intelligent electrical load tester - Google Patents
Intelligent electrical load tester Download PDFInfo
- Publication number
- CN86208293U CN86208293U CN 86208293 CN86208293U CN86208293U CN 86208293 U CN86208293 U CN 86208293U CN 86208293 CN86208293 CN 86208293 CN 86208293 U CN86208293 U CN 86208293U CN 86208293 U CN86208293 U CN 86208293U
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- power
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Abstract
The utility model relates to a small-size portable intelligent tester for testing electrical load, comprising a single chip microprocessor system, a testing circuit, a magnifying rectification circuit, a filter circuit, an analog-digital conversion circuit, a displaying, and a print circuit. The intelligent electrical load tester can stochastically test electric current and electric voltage of three-phase electrical load, calculate three-phase active power, three-phase reactive power, power factor, and quantity of electricity and display print results; on the other hand, the intelligent electrical load tester can draw daily and monthly three-phase electrical load curves, three-phase active power curve, three-phase reactive power curse, and power factor curve. The utility model can be used in electric departments, offering decision making reference for reasonable power utilization and saving power consumption.
Description
The present utility model relates to a kind of tester that is used for the electric load test, belongs to intelligent test instrument scope.
The test of electric load is to be rational utilization of electricity, and using electricity wisely provides an important evidence.The test of electric load in the past all is that distributing measures data, hand computation then, draws out the various curves of electric load.Clearly, do very inconvenient shortage accuracy like this, reliability is not high yet.Along with the development of microelectric technique, successively occurring both at home and abroad using the veneer microprocessor is the electric load proving installation of core.But make a general survey of its each side, following weak point arranged:
(1) owing to use the veneer microprocessor,, is unsuitable for and carries so the proving installation volume of making is big;
(2) function that does not have timing at random to draw the curve of detected parameters.Generally all is furnished with the data printing function.3160 series of producing as Japanese HIOKI company and 3180 serial power meters are that to adopt Z80-cpu be the Digital Electric Road test meter of core.Only be furnished with printer at random, as want the rendering parameter curve then to connect plotting machine (being referred to as to correlate machine) in addition;
(3) moreover, also do not reach perfect stage at least at home at present for the detection mode or the precision of electric load parameter.
Task of the present utility model is: the intelligent electric power Road test of the small portable instrument that a kind of chip microprocessor system that forms with chip microprocessor and the corresponding interface thereof is provided is core.The characteristics of this tester are:
(1) three-phase power load (particularly transformer low voltage output terminal and motor load) is tested;
(2) detection by three-phase power is loaded each phase current, voltage signal can regularly show, print phase current, the voltage of electric load, three phases active power, three phase reactive power, each amount of electric weight and power factor;
(3) draw out the load curve of tested electric load, three phases active power curve, three phase reactive power curve, power factor curve.
Below in conjunction with accompanying drawing the principle of work of this tester is described in detail (this narration is an example with one in the test three-phase power load mutually, and the test philosophy of other two-phase is identical).
Accompanying drawing is the theory diagram of this tester.Detect the load current signal of certain phase of three-phase power by split core type current transformer, become and the proportional voltage signal of primary current through the current/voltage-converted circuit conversion; Pay the voltage signal that frontier inspection is measured this phase by detecting transformer simultaneously; After the detected secondary voltage signal of detected current signal of the opposing party's split core type current transformer and transformer carries out superposition, generate and the proportional voltage signal of this superposition signal through change-over circuit.Above-mentioned three kinds of ac voltage signals become DC voltage respectively and input to monolithic microprocessor system after exchanging amplification, isolation, shaping, filtering.In this system, after sampling, analog to digital conversion, computing, obtain the data of required detection, and then timed print is drawn out various parametric lines.
This tester is made up of following several major parts.
One, input, amplification, isolation shaping unit.In this part, current signal is measured by split core type current transformer; Voltage signal is detected by a miniature transformer.On the detection signal addressed respectively after the stronger differential operational amplifying circuit of common mode inhibition capacity amplifies rectification, again by filtering, but generate the weak d. c. voltage signal that is fit to the chip microprocessor system handles.In this part,, solved the nonlinear problem of little current signal, satisfied the linear relationship between output dc voltage and the tested AC signal preferably owing to take aforesaid way and technical measures.Improved the antijamming capability of this tester simultaneously.
Be further to improve measurement, computational accuracy simultaneously, the utility model also carries out error compensation by software.
Two, analog to digital conversion part, the utility model adopts 8 analog to digital conversion integrated chips, and is equipped with high-precision reference power supply, makes analog to digital conversion that higher precision be arranged.
Three, chip microprocessor system, core of the present utility model has been to adopt the monolithic processor with typical performance, be equipped with corresponding data memory extended chip and memory under program extended chip and make this tester energy fast processing mass data, and through a programmable parallel interface chip, with result and necessary data send in light-emitting diode display show and printer in print.
Above-mentioned hardware unit is equipped with specific software, in the fixed time interval that is provided with on panel in advance, the data that collect can be processed processing, draw out the current capacity curve of tested three-phase power load, the three phases active power curve, three phase reactive power curve, power factor curve.
The utility model also is provided with standard serial and parallel interface, for further expanding of its function lays the first stone.
Implementation of an application example of the present utility model is as follows:
1. for 10/0.38 kv transformer low-voltage side outlet, detect each phase current, voltage, three phases active power, three phase reactive power, electric weight, power factor.And timed print shows.Electric current, voltage measure precision≤1%; Power factor precision≤2%.
2. for 10/0.38 KV distribution transformer low-pressure side, can print automatically and draw out daily load curve and monthly load curve, power factor curve.
The utility model model machine produces a desired effect fully through the laboratory and the trial run of actual job site.
Simultaneously, the utility model also can carry out Road test to the mapping of motor owing to adopted above-mentioned hardware and software.
Claims (3)
1, a kind of tester that is used for the electric load test, it is characterized in that this tester is that to be equipped with the chip microprocessor system that interface chip forms with chip microprocessor be core, by input, amplify, isolate, rectification, filtering, analog to digital conversion, show, printing portion is formed an integral body, put into a casing and form a complete device, by the electric current of chip microprocessor according to the three-phase power load that detects in real time, voltage, calculate three phases active power, three phase reactive power, power factor, electric weight, and with its demonstration, print, regularly draw daily load curve simultaneously, monthly load curve, the three phases active power curve, three phase reactive power curve, power factor curve.
2, tester according to claim 1, it is characterized in that current signal is detected by split core type current transformer, voltage signal is detected by transformer, and through the differential operational amplifying circuit carry out detection signal amplification rectification, isolation, carry out filtering by filtering circuit then.
3, tester according to claim 1 is characterized in that the chip microprocessor system is furnished with data memory extended chip, memory under program extended chip and serial, parallel interface chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86208293 CN86208293U (en) | 1986-11-03 | 1986-11-03 | Intelligent electrical load tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86208293 CN86208293U (en) | 1986-11-03 | 1986-11-03 | Intelligent electrical load tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86208293U true CN86208293U (en) | 1987-06-17 |
Family
ID=4810541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86208293 Withdrawn CN86208293U (en) | 1986-11-03 | 1986-11-03 | Intelligent electrical load tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86208293U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314971C (en) * | 2003-06-04 | 2007-05-09 | 重庆电力科学试验研究院 | Power electric energy meter of 1/4 digital squre multiplier |
| CN104081213A (en) * | 2012-02-13 | 2014-10-01 | 松下电器产业株式会社 | Power measuring apparatus |
| CN104101775A (en) * | 2013-04-02 | 2014-10-15 | 优利德科技(中国)有限公司 | Current measuring circuit |
| CN107797065A (en) * | 2017-10-19 | 2018-03-13 | 佘德勇 | Frequency conversion fan low speed operation troubles detects warning circuit |
| CN108918995A (en) * | 2018-06-12 | 2018-11-30 | 六盘水金星机电设备有限公司 | A kind of portable three-phase power load monitor |
-
1986
- 1986-11-03 CN CN 86208293 patent/CN86208293U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314971C (en) * | 2003-06-04 | 2007-05-09 | 重庆电力科学试验研究院 | Power electric energy meter of 1/4 digital squre multiplier |
| CN104081213A (en) * | 2012-02-13 | 2014-10-01 | 松下电器产业株式会社 | Power measuring apparatus |
| CN104101775A (en) * | 2013-04-02 | 2014-10-15 | 优利德科技(中国)有限公司 | Current measuring circuit |
| CN107797065A (en) * | 2017-10-19 | 2018-03-13 | 佘德勇 | Frequency conversion fan low speed operation troubles detects warning circuit |
| CN108918995A (en) * | 2018-06-12 | 2018-11-30 | 六盘水金星机电设备有限公司 | A kind of portable three-phase power load monitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Designer after: Wang Yiming Designer after: Wang Jianguo Designer after: Dai Dingning Designer before: Wang Yiming Designer before: Wang Jianguo |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: DESIGNER; FROM: WANG YIMING; WANG JIANGUO TO: WANG YIMING; WANG JIANGUO; DAI DINGNING |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |