CN206563780U - The anti-interference line parameter circuit value intelligent tester of frequency conversion - Google Patents
The anti-interference line parameter circuit value intelligent tester of frequency conversion Download PDFInfo
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- CN206563780U CN206563780U CN201720195098.XU CN201720195098U CN206563780U CN 206563780 U CN206563780 U CN 206563780U CN 201720195098 U CN201720195098 U CN 201720195098U CN 206563780 U CN206563780 U CN 206563780U
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Abstract
A kind of anti-interference line parameter circuit value intelligent tester of frequency conversion, it includes instrument signal sample circuit, data processor, result and shown, three part orders are connected, it, which is characterized by it, also has an anti-jamming circuit being connected with instrument signal sample circuit, and anti-jamming circuit is used to produce with interference signal with frequency, suppression signal in opposite direction.The voltage and current signal that the utility model returns outside collection, handled respectively by high-precision AD after conversion, data signal is conveyed into data processor to be handled, the size and Orientation of interference signal is drawn, anti-jamming circuit exports a suppression signal equal in magnitude with interference signal, in opposite direction, offseted with interference signal, so remaining signal is exactly the frequency variation signal for being actually subjected to measurement, then is converted through data processor, draws the correct result of this measurement.Interference of the power frequency electric field to test is avoided, the problem accurately measured under highfield interference is fundamentally solved.
Description
Technical field
The utility model is the anti-interference line parameter tester of frequency conversion.
Background technology
The working envelope figure of existing power frequency line parameter tester as shown in figure 1, it include instrument signal sample circuit 1,
Data processor 2, result show 3 three parts, and the signal input that instrument signal sample circuit circuit is connect uses 50Hz work
Frequency power（Include actual test signal and live interference signal）Tested, typically all deposited during ultra-high-tension power transmission line parameter measurement
In strong Hz noise, measured signal " being flooded " is in strong Hz noise, and conventional instrument can not under interference
Obtain correct reading.
The content of the invention
The purpose of this utility model be to provide it is a kind of can be anti-interference, measure the anti-interference line parameter circuit value intelligence of accurate frequency conversion
Tester.
The technical scheme that the utility model is used is a kind of anti-interference line parameter circuit value intelligent tester of frequency conversion, and it includes instrument
Device signal sample circuit, data processor, result show, three part orders are connected, its be characterized by it also have one with
The connected anti-jamming circuit of instrument signal sample circuit, anti-jamming circuit is for producing with the same frequency of interference signal, in the opposite direction
Suppress signal.
Anti-jamming circuit is made up of three phase mains, current rectifying and wave filtering circuit, SPWM inverter circuits, three-phase isolation transformer, respectively
Circuit sequence is connected.
The voltage and current signal that the utility model returns outside collection, is handled after conversion by high-precision AD respectively, will
Data signal is conveyed to data processor and handled, and draws the size and Orientation of interference signal, and anti-jamming circuit exports one
Suppression signal equal in magnitude with interference signal, in opposite direction, is offseted with interference signal, and so remaining signal is exactly actual
The frequency variation signal to be measured, then converted through data processor, draw the correct result of this measurement.Power frequency electric field is avoided to survey
The interference of examination, fundamentally solves the problem accurately measured under highfield interference.Generated electricity simultaneously suitable for being used after all having a power failure
Machine is powered the occasion of detection.
Brief description of the drawings
Fig. 1 is the functional-block diagram of existing power frequency line parameter tester
Fig. 2 is functional-block diagram of the present utility model
Fig. 3 is the functional-block diagram of anti-jamming circuit
Wherein：The result of 1 instrument signal sample circuit, 2 data processor 3 shows the rectification of 4 anti-jamming circuit, 41 three phase mains 42
The three-phase isolation transformer of filter circuit 43SPWM inverter circuits 44.
Embodiment
The utility model is described in detail with reference to view, cited embodiment can make this professional skill
Art personnel more understand the utility model, but do not limit the utility model in any form
As shown in Figure 2,3, the anti-interference line parameter circuit value intelligent tester of a kind of frequency conversion, it includes instrument signal sample circuit electricity
Road 1, data processor 2, result show 3, and three part orders are connected, and it is characterized by it and also adopted with one with instrument signal
The connected anti-jamming circuit 4 of sample circuit 1, anti-jamming circuit 4 is used to produce to be believed with interference signal with frequency, suppression in opposite direction
Number.Anti-jamming circuit 4 is by three phase mains 41, current rectifying and wave filtering circuit 42, SPWM inverter circuits 43,44 groups of three-phase isolation transformer
Into.Anti-jamming circuit 4 is by three phase mains 41, current rectifying and wave filtering circuit 42, SPWM inverter circuits 43,44 groups of three-phase isolation transformer
Into each circuit sequence is connected.
The voltage and current signal that the utility model returns outside collection, is handled after conversion by high-precision AD respectively, will
Data signal is conveyed to data processor and handled, and draws the size and Orientation of interference signal, and anti-jamming circuit exports one
Suppression signal equal in magnitude with interference signal, in opposite direction, is offseted with interference signal, and so remaining signal is exactly actual
The frequency variation signal to be measured, then converted through data processor, draw the correct result of this measurement.Power frequency electric field is avoided to survey
The interference of examination, fundamentally solves the problem accurately measured under highfield interference.
By taking 45/55Hz as an example, using converter technique, using 45/55Hz（Or 40/60Hz, 42.5/57.5Hz, 47.5/
52.5Hz）Double frequency is measured, in the case of strongly disturbing, and in complicated chaotic signal, frequency is produced by anti-jamming circuit
50Hz, suppression signal in opposite direction, exclude 50Hz interfering frequency, 45/55Hz stimulus are selected, by high-precision
After processor processing, reliable 45Hz, 55Hz test datas are drawn, and be converted into 50Hz power frequency value.
Claims (2)
1. a kind of anti-interference line parameter circuit value intelligent tester of frequency conversion, it includes instrument signal sample circuit（1）, data processor
（2）, result shows（3）, three part orders are connected, it is characterised in that it also has one and instrument signal sample circuit（1）
Connected anti-jamming circuit（4）, anti-jamming circuit（4）For producing with interference signal with frequency, suppression signal in opposite direction.
2. the anti-interference line parameter circuit value intelligent tester of frequency conversion according to claim 1, it is characterised in that anti-jamming circuit
（4）By three phase mains（41）, current rectifying and wave filtering circuit（42）, SPWM inverter circuits（43）, three-phase isolation transformer（44）Composition, respectively
Circuit sequence is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720195098.XU CN206563780U (en) | 2017-03-02 | 2017-03-02 | The anti-interference line parameter circuit value intelligent tester of frequency conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720195098.XU CN206563780U (en) | 2017-03-02 | 2017-03-02 | The anti-interference line parameter circuit value intelligent tester of frequency conversion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206563780U true CN206563780U (en) | 2017-10-17 |
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ID=60031743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720195098.XU Active CN206563780U (en) | 2017-03-02 | 2017-03-02 | The anti-interference line parameter circuit value intelligent tester of frequency conversion |
Country Status (1)
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| CN (1) | CN206563780U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964811A (en) * | 2018-06-07 | 2018-12-07 | 珠海格力电器股份有限公司 | A kind of strain measurement system and method |
-
2017
- 2017-03-02 CN CN201720195098.XU patent/CN206563780U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964811A (en) * | 2018-06-07 | 2018-12-07 | 珠海格力电器股份有限公司 | A kind of strain measurement system and method |
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