CN102081123A - Automatic capacitance and inductance testing device - Google Patents
Automatic capacitance and inductance testing device Download PDFInfo
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- CN102081123A CN102081123A CN2009102327322A CN200910232732A CN102081123A CN 102081123 A CN102081123 A CN 102081123A CN 2009102327322 A CN2009102327322 A CN 2009102327322A CN 200910232732 A CN200910232732 A CN 200910232732A CN 102081123 A CN102081123 A CN 102081123A
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Abstract
The invention discloses an automatic capacitance and inductance testing device which comprises a master control board, a rectifying filtering module, a voltage-stabilizing module, a voltage switching module, a voltage and current filtering module, an amplifying module, a regulating gain module, a sampling frequency splitting module, a phase-locked loop module, a frequency measuring module, an alternating current synchronous sampling module, a signal control module, a clock module and an input-output module, wherein the rectifying filtering module is used for converting input alternating current into direct current; the voltage-stabilizing module is electrically connected with the output end of a rectifying filtering circuit; the voltage switching module is applied to a specimen; the voltage and current filtering module is used on the specimen; and the current and voltage of the specimen are measured by the master control board. Due to the adoption of the technical scheme in which current measurement adopts a tong-type ammeter capable of realizing measurement without disassembly and voltage measurement is performed by a hall voltage sensor, the automatic capacitance and inductance testing device is an instrument for measuring the capacitance and inductance of non-removable electric equipment installed in a power station and a transformer station, and is used for checking and overhauling the equipment to find out faults in time.
Description
Technical field
The present invention relates to a kind of electric capacity, inductance automatic testing equipment, particularly a kind of The parallel power condenser, inductor of being used for, not disconnection can be measured single electric capacity wherein, the capacitor and inductor automatic testing equipment of inductance, belong to electrical technology field.
Background technology
The capacitor and inductor automatic testing equipment is to be used for instrument that the electric capacitor inductance is measured, existing method mostly is that single electric capacity, inductance are measured, but it is, more and more higher to power system security, requirement stable and economical operation along with big electrical network of modern times develops to UHV (ultra-high voltage), high capacity and remote direction.The large-capacity power electric capacity that uses in the electric system, inductance are also more and more, and test job also increases thereupon.When the power equipment that has put into operation is tested,, generally be its wiring not to be untied or change from security consideration.Therefore need a kind of the instrument of sending out, installing already in the transformer station, non-removable electric capacitor, inductance are measured to be used for inspection, the maintenance of equipment, in time find fault.
Summary of the invention
At the technical matters of above-mentioned existence, the purpose of this invention is to provide a kind of The parallel power condenser, inductor of being used for, not disconnection can be measured single electric capacity wherein, the capacitor and inductor automatic testing equipment of inductance.
Realize that technical scheme of the present invention is: a kind of capacitor and inductor automatic testing equipment, comprise master control borad, be used for will input alternating current be converted to galvanic rectification filtering module, the Voltage stabilizing module that is electrically connected with the output terminal of described current rectifying and wave filtering circuit, be added in test product power on filtration module, amplification module, adjusting gain module, frequency division module, phase-locked loop module, frequency measurement module, AC synchronous sampling module, signal controlling module, clock module and the input of sampling, the output module of voltage and current on crush-cutting die change piece, the test product; By master control borad test product is carried out electric current, voltage measurement; Wherein the electric current split-core type meter is adopted in current measurement, can realize not dismantling measurement with the electric current split-core type meter.
Preferably, the voltage measurement part is measured by the Hall voltage sensor.
Preferably, described capacitor and inductor auto testing instrument also is provided with voltage short-circuit protection module, overload protection module, wiring error protection module.
Because the utilization of technique scheme, the present invention compared with prior art has following advantage:
Because the employing of technique scheme, wherein the electric current split-core type meter is adopted in current measurement, can realize not dismantling measurement with the electric current split-core type meter; The voltage measurement part is measured by the Hall voltage sensor; Be a kind of the instrument of sending out, installing already in the transformer station, non-removable electric capacitor, inductance are measured to be used for inspection, the maintenance of equipment, in time find fault.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Accompanying drawing 1 is the electrical principle block diagram of capacitor and inductor automatic testing equipment of the present invention;
Accompanying drawing 2 is capacitor and inductor automatic testing equipment of the present invention system composition diagram;
Wherein: 1, power module; 2, current signal processing module; 3, electric current, voltage gain control module; 4, signal amplification module; 5, voltage, electric current synchronized sampling module; 6, voltage signal processing module; 7, frequency measurement module; 8, master control borad.
Embodiment:
Of the present invention a kind of capacitor and inductor automatic testing equipment as shown in Figure 1, method of testing is to provide tested product voltage signal by this capacitor and inductor automatic testing equipment, this signal is delivered to master control borad and is measured (doing introduction again in the concrete measuring process accompanying drawing 2) simultaneously, on test specimen, produce electric current after applying voltage, this current signal is also delivered to master control borad and is measured, calculate (but this algorithm filtering harmonic components) according to measurement data by Fourier algorithm, draw amplitude and phase angle, draw net result according to following formula.The capacitor and inductor auto testing instrument records the synchronous AC sampled voltage that applies on the electric current that flows through test product, the test product, by Fourier analysis, obtains the amplitude and the phase place of electric current, voltage.Pass through formula:
Z＝(|U|/|I|)*(∠ΦU-∠ΦI)，ZC＝R+1/jωC，ZL＝R+jω
L is ω=2 π f wherein, the frequency values of f for measuring, and the voltage that applies of this instrument is power-frequency voltage, its frequency is as the criterion with the concrete data of actual measurement.
The test loop of described capacitor and inductor automatic testing equipment as shown in Figure 2, power module 1 is the power pack of master control borad, this part is to give the master control borad AC signal by the transformer of many windings, rectification by master control borad and filtering obtain the spendable analog powers of many groups, the digital power that provides by Switching Power Supply; Current signal processing module 2 is to be clipped in the current signal that obtains on the test product loop by the electric current split-core type meter to deliver to master control borad 8, carries out signal sampling by master control borad 8; Because the scope of the test product that will measure is bigger, the variation range that need be added in the voltage and current on the test product is also just bigger, in order to measure accurately, needs the size of conditioning signal, therefore need electric current, voltage gain control module 3, the multiple of this gain is 1-16; Signal amplification module 4, this part are realized the amplification of signal and signal are carried out filtering.After the filtering signal is isolated, signal after the isolation will be gathered, the acquired signal synchronized sampling, to guarantee that voltage and current is sampled is not produce phase shift, wherein realize the sampling time by counter and phaselocked loop, this partial circuit is voltage, electric current synchronized sampling module 5.Voltage signal processing module 6 is to measure the voltage be added on the test product, and this voltage is input to master control borad 8, on the master control borad 8 by behind the Hall voltage sensor its signal being sampled; Frequency measurement circuit 7, this part are the frequencies of measuring voltage and current signal, and influential because frequency signal is measured test product equally, this capacitor and inductor automatic testing equipment need be measured the actual frequency that applies, and this signal is also isolated through filtering before measuring.Master control borad 8 is parts that the signal after the above collection is calculated, calculating section has adopted Fourier algorithm, therefore operand is bigger, has adopted dsp chip in order to improve this part of arithmetic speed, and this part has also realized button operation, the demonstration of liquid crystal display and the control of printer.More than be the main composition of this capacitor and inductor auto testing instrument.
Because the utilization of technique scheme, the present invention compared with prior art has following advantage:
Because the employing of technique scheme, wherein the electric current split-core type meter is adopted in current measurement, can realize not dismantling measurement with the electric current split-core type meter; The voltage measurement part is measured by the Hall voltage sensor; Be a kind of the instrument of sending out, installing already in the transformer station, non-removable electric capacitor, inductance are measured to be used for inspection, the maintenance of equipment, in time find fault.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, or any to move mode dull and stereotyped described in the present invention, all drop within the rights protection scope of the present invention.
Claims (3)
1. capacitor and inductor automatic testing equipment is characterized in that: comprise master control borad, be used for will input alternating current be converted to galvanic rectification filtering module, the Voltage stabilizing module that is electrically connected with the output terminal of described current rectifying and wave filtering circuit, be added in test product power on filtration module, amplification module, adjusting gain module, frequency division module, phase-locked loop module, frequency measurement module, AC synchronous sampling module, signal controlling module, clock module and the input of sampling, the output module of voltage and current on crush-cutting die change piece, the test product; By master control borad test product is carried out electric current, voltage measurement; Wherein the electric current split-core type meter is adopted in current measurement, can realize not dismantling measurement with the electric current split-core type meter.
2. capacitor and inductor automatic testing equipment according to claim 1 is characterized in that: the voltage measurement part is measured by the Hall voltage sensor.
3. capacitor and inductor automatic testing equipment according to claim 1 is characterized in that: described capacitor and inductor auto testing instrument also is provided with voltage short-circuit protection module, overload protection module, wiring error protection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102327322A CN102081123A (en) | 2009-11-30 | 2009-11-30 | Automatic capacitance and inductance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102327322A CN102081123A (en) | 2009-11-30 | 2009-11-30 | Automatic capacitance and inductance testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102081123A true CN102081123A (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102327322A Pending CN102081123A (en) | 2009-11-30 | 2009-11-30 | Automatic capacitance and inductance testing device |
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| CN (1) | CN102081123A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901866A (en) * | 2011-07-27 | 2013-01-30 | 苏州华电电气股份有限公司 | Vehicular automatic capacitance and inductance tester |
| CN107748309A (en) * | 2017-12-01 | 2018-03-02 | 株洲中车电气科技有限公司 | Locomotive automatic neutral-section passing system all-round property testing method and product |
| CN113358937A (en) * | 2021-04-26 | 2021-09-07 | 广西电网有限责任公司电力科学研究院 | Signal synchronous sampling device in capacitor cable-free measurement |
-
2009
- 2009-11-30 CN CN2009102327322A patent/CN102081123A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901866A (en) * | 2011-07-27 | 2013-01-30 | 苏州华电电气股份有限公司 | Vehicular automatic capacitance and inductance tester |
| CN107748309A (en) * | 2017-12-01 | 2018-03-02 | 株洲中车电气科技有限公司 | Locomotive automatic neutral-section passing system all-round property testing method and product |
| CN113358937A (en) * | 2021-04-26 | 2021-09-07 | 广西电网有限责任公司电力科学研究院 | Signal synchronous sampling device in capacitor cable-free measurement |
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Application publication date: 20110601 |