CN102279378A - Input impedance measurement device of active alternating current (ac) voltage measurement circuit or apparatus and method thereof - Google Patents
Input impedance measurement device of active alternating current (ac) voltage measurement circuit or apparatus and method thereof Download PDFInfo
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- CN102279378A CN102279378A CN201110186685XA CN201110186685A CN102279378A CN 102279378 A CN102279378 A CN 102279378A CN 201110186685X A CN201110186685X A CN 201110186685XA CN 201110186685 A CN201110186685 A CN 201110186685A CN 102279378 A CN102279378 A CN 102279378A
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Abstract
The invention discloses an input impedance measurement device of an active alternating current (ac) voltage measurement circuit or an apparatus and a method thereof. Through using a RCL measuring instrument, when a test terminal or a clamp of the RCL measuring instrument is connected with a measured piece, an input impedance of the active ac voltage measurement circuit or apparatus can be measured. By using the current technology, an active alternating current (ac) voltage measurement circuit or apparatus input impedance measuring circuit is complex, an element is needed to form the circuit, operation and calculation are complex, and measuring accuracy is low or even measuring can not be performed. By using the apparatus and the method provided in the invention, a measuring result is stable and reliable; the measuring circuit is simple; a general instrument is used and the circuit does not need to be formed by the element; the operation and the calculation are simple and fast; measuring costs are low; measuring efficiency and the measuring accuracy of the input impedance can be substantially raised. Enforcement of measuring the input impedance of the active ac voltage measurement circuit or apparatus can be boosted. The method of the invention provides technology means for product quality control and measuring result accuracy and reliability.
Description
Technical field
The present invention relates to the input impedance measurement mechanism and the method for a kind of alternating current voltage measuring circuit or instrument, belong to instrument and meter, measurement and control technology field.
Background technology
Active AC voltage metering circuit or instrument comprise A.C. voltmeter, measure voltage divider, oscillograph, measuring amplifier, radio communication comprehensive test instrument, Frequency Response Analysis instrument, modulation meter, measuring receiver, distortion meter, various voltage secondary instrument, voltage amplifier integrated circuit etc.Active AC voltage metering circuit or instrument input impedance are active AC voltage metering circuit or the important meter characteristic of instrument, are the material impact amounts that influences active AC voltage metering circuit or instrument accuracy grade.
The measuring method of active AC voltage metering circuit or instrument input impedance adopts the bridge circuit method usually in the prior art, as shown in Figure 1, the measuring circuit complexity, need be with components and parts from taking metering circuit, the operational computations relative complex, and circuit leaks serious interference, and the measurement of active AC voltage metering circuit or instrument input impedance is extremely inaccurate, sometimes even survey not come out.
Therefore, the attitude of often measurement of active AC voltage metering circuit or instrument input impedance being taked to avoid accident more in the time of many, have a strong impact on the designing and manufacturing level and the quality assessment of active AC voltage metering circuit or instrument, influenced the accuracy of measurement and the stoichiometric level of alternating voltage value.
Summary of the invention
Technical matters to be solved by this invention provides a kind of based on the active AC voltage metering circuit of RCL measuring instrument or the measurement mechanism and the method for instrument input impedance, does not need from taking metering circuit, and is simple to operate, can obtain stable and accurate measurement result.
For solving the problems of the technologies described above, the invention provides the input impedance measurement mechanism of a kind of active AC voltage metering circuit or instrument, it is characterized in that comprise a RCL measuring instrument, the calibrating terminal of described RCL measuring instrument or anchor clamps are connected with measured piece.
Described measured piece is active AC voltage metering circuit or instrument.
Described active AC voltage metering circuit or instrument comprise A.C. voltmeter, measure voltage divider, oscillograph, measuring amplifier, radio communication comprehensive test instrument, Frequency Response Analysis instrument, modulation meter, measuring receiver, distortion meter, various voltage secondary instrument or voltage amplifier integrated circuit.
The calibrating terminal of described RCL measuring instrument or the input end of anchor clamps are connected with the input end of described measured piece.
The input impedance measuring method of a kind of active AC voltage metering circuit or instrument is characterized in that, comprises following steps:
Measured piece is connected to RCL measuring instrument calibrating terminal or anchor clamps;
Measured piece, the start of RCL measuring instrument;
Select the survey frequency of RCL measuring instrument;
Select the equivalent electrical circuit form of RCL measuring instrument;
From the display screen of RCL measuring instrument read the input impedance of measured piece.
Described input impedance comprises input resistance.
Described input impedance comprises input capacitance or input inductance.
The beneficial effect that the present invention reached:
The invention solves in the present technology active AC voltage metering circuit or instrument input impedance measuring circuit complexity, need be with element from taking circuit, operational computations complexity, the low even problem that can't measure of accuracy of measurement.Realized utilizing all purpose instrument RCL measuring instrument to measure active AC voltage metering circuit or instrument input impedance.Measurement result is reliable and stable, measuring circuit is simple, use all purpose instrument, need not with element from taking circuit, operational computations is simple and efficient, and it is low to measure cost, and the present invention can significantly improve the efficiency of measurement and the accuracy of measurement of active AC voltage metering circuit or instrument input impedance, the enforcement that can advance active AC voltage metering circuit or instrument input impedance to measure is for production quality control, measurement result provide technological means accurately and reliably.
Description of drawings
Fig. 1 is active AC voltage metering circuit or an instrument input impedance metering circuit synoptic diagram in the prior art;
Fig. 2 is the input impedance measurement mechanism synoptic diagram of active AC voltage metering circuit of the present invention or instrument.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
Active AC voltage metering circuit or instrument comprise many kinds, and present embodiment is an example with the oscillograph, the input impedance of adopting based on the apparatus and method measuring oscilloscope of the present invention of RCL measuring instrument method are described, i.e. the process of input resistance and input capacitance.
Measuring circuit as shown in Figure 2, measured piece is selected TDS3032 type oscillograph for use, the RCL measuring instrument is selected PM6306 type RCL measuring instrument (or claiming the RCL tester), simple to operate, only need measured piece is connected to RCL measuring instrument calibrating terminal or anchor clamps, can be at once from the display screen of RCL measuring instrument read the major parameter and second parameter.With the measured piece start, select the survey frequency of RCL measuring instrument, selecting the RCL measuring instrument is resistance equivalent electrical circuit in parallel with electric capacity, the resistance displayed value of RCL measuring instrument is the input resistance of measured piece
R i, the electric capacity displayed value of RCL measuring instrument or inductance displayed value are the input capacitance of measured piece
C iOr input inductance
L iGeneral RCL measuring instrument can form the alternating voltage about 1kHz, 2V at the input end of measured piece, therefore should check the measuring voltage of RCL measuring instrument, should suitably select the range of measured piece, avoids producing overload.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.
Claims (7)
1. the input impedance measurement mechanism of active AC voltage metering circuit or instrument is characterized in that comprise a RCL measuring instrument, the calibrating terminal of described RCL measuring instrument or anchor clamps are connected with measured piece.
2. the input impedance measurement mechanism of active AC voltage metering circuit according to claim 1 or instrument is characterized in that, described measured piece is active AC voltage metering circuit or instrument.
3. the input impedance measurement mechanism of active AC voltage metering circuit according to claim 2 or instrument, it is characterized in that described active AC voltage metering circuit or instrument comprise A.C. voltmeter, measure voltage divider, oscillograph, measuring amplifier, radio communication comprehensive test instrument, Frequency Response Analysis instrument, modulation meter, measuring receiver, distortion meter, various voltage secondary instrument or voltage amplifier integrated circuit.
4. the input impedance measurement mechanism of active AC voltage metering circuit according to claim 1 or instrument is characterized in that, the calibrating terminal of described RCL measuring instrument or the input end of anchor clamps are connected with the input end of described measured piece.
5. the input impedance measuring method of active AC voltage metering circuit or instrument is characterized in that, comprises following steps:
Measured piece is connected to RCL measuring instrument calibrating terminal or anchor clamps;
Measured piece, the start of RCL measuring instrument;
Select the survey frequency of RCL measuring instrument;
Select the equivalent electrical circuit form of RCL measuring instrument;
From the display screen of RCL measuring instrument read the input impedance of measured piece.
6. the input impedance measuring method of active AC voltage metering circuit according to claim 5 or instrument is characterized in that described input impedance comprises input resistance.
7. according to the input impedance measuring method of claim 5 or 6 described active AC voltage metering circuits or instrument, it is characterized in that described input impedance comprises input capacitance or input inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110186685XA CN102279378A (en) | 2011-07-05 | 2011-07-05 | Input impedance measurement device of active alternating current (ac) voltage measurement circuit or apparatus and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110186685XA CN102279378A (en) | 2011-07-05 | 2011-07-05 | Input impedance measurement device of active alternating current (ac) voltage measurement circuit or apparatus and method thereof |
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| CN102279378A true CN102279378A (en) | 2011-12-14 |
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| CN201110186685XA Pending CN102279378A (en) | 2011-07-05 | 2011-07-05 | Input impedance measurement device of active alternating current (ac) voltage measurement circuit or apparatus and method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010044026A1 (en) * | 2008-10-16 | 2010-04-22 | Koninklijke Philips Electronics N.V. | Impedance measurement circuit and method |
| CN101799495A (en) * | 2010-03-25 | 2010-08-11 | 上海交通大学 | Automatic impedance-testing system for flexible film microelectrode arrays |
| CN101866191A (en) * | 2010-03-16 | 2010-10-20 | 沈阳飞机工业（集团）有限公司 | Complete calibration method of AC stabilized-voltage power supply |
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2011
- 2011-07-05 CN CN201110186685XA patent/CN102279378A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010044026A1 (en) * | 2008-10-16 | 2010-04-22 | Koninklijke Philips Electronics N.V. | Impedance measurement circuit and method |
| CN101866191A (en) * | 2010-03-16 | 2010-10-20 | 沈阳飞机工业（集团）有限公司 | Complete calibration method of AC stabilized-voltage power supply |
| CN101799495A (en) * | 2010-03-25 | 2010-08-11 | 上海交通大学 | Automatic impedance-testing system for flexible film microelectrode arrays |
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Application publication date: 20111214 |