CN102435822A - Piezoelectric ceramic-based electronic voltage mutual induction device - Google Patents
Piezoelectric ceramic-based electronic voltage mutual induction device Download PDFInfo
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- CN102435822A CN102435822A CN2011104432034A CN201110443203A CN102435822A CN 102435822 A CN102435822 A CN 102435822A CN 2011104432034 A CN2011104432034 A CN 2011104432034A CN 201110443203 A CN201110443203 A CN 201110443203A CN 102435822 A CN102435822 A CN 102435822A
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Abstract
The invention relates to a piezoelectric ceramic-based electronic voltage mutual induction device and belongs to the technical field of voltage transformers of power systems. The electronic voltage mutual induction device comprises an optical measurement unit, a data acquisition unit and a signal output unit, wherein the optical measurement unit is used for measuring the voltage of a power grid by an inverse piezoelectric effect of piezoelectric ceramics and an optical lever deformation measurement principle and converting the voltage linearity of the power grid into low-voltage signals; the data acquisition unit is used for performing data processing on the low-voltage signals to acquire digital low-voltage signals; and the signal output unit is used for outputting and displaying accurate low-voltage signals. The electronic voltage mutual induction device has a small volume, light weight, a small occupied area, low cost, low power consumption, high measurement accuracy and good anti-jamming performance.
Description
Technical field
The present invention relates to a kind of electronic voltage mutual inductance device, belong to power system voltage mutual inductor technical field based on piezoelectric ceramics.
Background technology
Voltage transformer (VT) has important effect in electric system, it is the indispensable basic test equipment of power system monitoring.A large amount of uses is traditional induction or capacitive divided voltage mutual inductor at present; Growth along with electricity needs; Electric system is towards high pressure, jumbo trend development; The traditional voltage mutual inductor is in the shortcoming of having showed it aspect the safe operation of electric system, the precision that improves electric energy measurement and the raising Automation of Electric Systems degree day by day; Such as bulky, weight is surprising, insulation system is complicated, has ferromagnetic saturated and ferroresonance phenomenon and explosion danger etc., and the development of Along with computer technology and the measurement of power equipment electrical secondary system, protection and control device; Requiring of the intelligent high-quality operation of electric power digitalization is increasingly high, and it is significant that development and Design has the intelligentized miniature modularization power equipment of combination functions such as measurement, protection, monitoring, communication.That photoelectric technology combines with computer technology and electronic voltage mutual inductor that produce shows prospect glamorous and great vitality day by day; Conventional photo-electricity mutual-inductor is very high to optical fiber and light source requirements; Phase change is no more than 0.02rad; And the temperature requirement to photoelectric crystal is strict, has limited its practicalization, the significant and vast market prospect of exploitation of novel electron mutual induction of voltage device.
Summary of the invention
Technical matters to be solved by this invention is to the deficiency of above-mentioned background technology, and a kind of electronic voltage mutual inductance device based on piezoelectric ceramics is provided.
The present invention adopts following technical scheme for realizing the foregoing invention purpose:
A kind of electronic voltage mutual inductance device based on piezoelectric ceramics comprises: optical measurement unit, data acquisition unit, signal output unit; Wherein: the get access to grid output terminal of voltage, optical measurement unit of the input end of optical measurement unit is connected with the input end of data acquisition unit, and the output terminal of data acquisition unit is connected with the input end of signal output unit;
Said optical measurement unit is converted into low voltage signal with line voltage, and data acquisition unit carries out data processing to low voltage signal and obtains digital low voltage signal, and signal output unit output shows accurate low voltage signal.
In the said electronics mutual inductance device based on piezoelectric ceramics, said optical measurement unit is made up of the elastic cantilever, piezoelectric membrane, piezoelectric ceramics heap, laser instrument, parallel reflector cavity, the quick photoelectric detector in position that are arranged at respectively in the casing; Wherein:
Said piezoelectric ceramics heap lies in a horizontal plane in the bottom of casing; Said piezoelectric membrane places the upper surface of piezoelectric ceramics heap; One end of said elastic cantilever is connected with piezoelectric membrane, and the other end is fixed on the right side wall of casing, and said laser instrument is fixed on casing top and the perpendicular position of elastic cantilever; Institute's quick photoelectric detector of rheme is vertically fixed on the left side wall of casing, and said parallel reflector cavity level places between the quick photoelectric detector of elastic cantilever and position.
In the said electronics mutual inductance device based on piezoelectric ceramics, said data acquisition unit comprises simulated modulation circuit, analog to digital converter, the digital signal processing circuit that connects successively;
Wherein: said simulated modulation circuit carries out power amplification and phase correction to the low-voltage signal of optical detection unit output; Said analog to digital converter is converted into digital low voltage signal with the simulation low voltage signal of simulated modulation circuit output; Said digital signal processing circuit is gathered the parameter of digital low voltage signal, calculates amplitude, the phase place of low voltage signal.
In the said electronic voltage mutual inductance device based on piezoelectric ceramics, said signal output unit comprises signal display module and secondary device; Wherein: secondary device is by the digital low voltage signal power supply of data acquisition unit output, the parameter value of the real-time display digit low voltage signal of display module.
The present invention adopts technique scheme, has following beneficial effect:
(1) little, in light weight, the solid-state encapsulation of equipment volume can reduce floor area and cost, and power consumption is very low, and power savings is obvious;
(2) measuring accuracy is high, can realize the measurement of 10kv precision 0.05 step voltage, and anti-interference is good;
(3) no short circuit risk phenomenon, stable performance;
(4) realize that on-line communication perhaps directly links to each other with secondary device, realize intelligent control.The needs of current intelligent grid development have been satisfied.
Description of drawings
Fig. 1 is the electronic voltage mutual inductance schematic representation of apparatus based on piezoelectric ceramics.
Label declaration among the figure: 1, optical detection unit; 1-1, elastic cantilever; 1-2, piezoelectric membrane; 1-3 piezoelectric ceramics heap; 1-3-1, piezoelectric ceramic piece; 1-4, laser instrument; 1-5, parallel reflector cavity; 1-6, the quick photoelectric detector in position; 2, data acquisition unit; 2-1, simulated modulation circuit; 2-2, analog to digital converter; 2-3, digital signal processing circuit; 3, signal output unit; 3-1, signal display module; 3-2, secondary device; 4, power module.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to invention:
Electronic voltage mutual inductance device based on piezoelectric ceramics as shown in Figure 1 comprises: optical measurement unit 1, data acquisition unit 2, signal output unit 3, power module 4.The get access to grid output terminal of voltage, optical measurement unit 1 of the input end of optical measurement unit 1 is connected with the input end of data acquisition unit 2, and the output terminal of data acquisition unit 2 is connected with the input end of signal output unit 3.Optical measurement unit 1 is converted into low voltage signal with line voltage; 2 pairs of low voltage signals of data acquisition unit carry out data processing and obtain digital low voltage signal; Signal output unit 3 outputs show accurate low voltage signal, and power module 4 provides working power for optical detection unit 1, data acquisition unit 2, signal output unit 3.
Data acquisition unit 2 comprises simulated modulation circuit 2-1, analog to digital converter 2-2, the digital signal processing circuit 2-3 that connects successively.Simulated modulation circuit 2-1 carries out power amplification and phase correction to the low voltage signal of optical detection unit output.Analog to digital conversion circuit 2-2 is converted into digital signal to the simulating signal of simulated modulation circuit 2-1 output.Digital signal processing circuit 2-3 adopts high-performance CPU as its core component, its effect be according to demand to signal store, show, processing such as communication and conversion.
Signal output unit 3 is made up of signal display module 3-1 and secondary device 3-2.Signal display module 3-1 can realize the real-time demonstration of low voltage signal basic parameter, also can export signal as required to secondary device 3-2.
It is thus clear that; The present invention has utilized the inverse piezoelectric effect of stupalith and optical lever survey deformation principle to reflect and measure the high voltage of electric system, and adopts ingenious Design of Mechanical Structure to realize the linearity transmission of high low voltage signal, thereby possesses high measurement accuracy; Device is simple; The advantage of small and light adopts the core component of high-performance CPU as data acquisition unit simultaneously, makes device satisfy Automation of Electric Systems and intelligentized demand.
Claims (4)
1. the electronic voltage mutual inductance device based on piezoelectric ceramics is characterized in that, comprising: optical measurement unit, data acquisition unit, signal output unit; Wherein: the get access to grid output terminal of voltage, optical measurement unit of the input end of optical measurement unit is connected with the input end of data acquisition unit, and the output terminal of data acquisition unit is connected with the input end of signal output unit;
Said optical measurement unit is converted into low voltage signal with line voltage, and data acquisition unit carries out data processing to low voltage signal and obtains digital low voltage signal, and signal output unit output shows accurate low voltage signal.
2. the electronics mutual inductance device based on piezoelectric ceramics according to claim 1; It is characterized in that said optical measurement unit is made up of the elastic cantilever, piezoelectric membrane, piezoelectric ceramics heap, laser instrument, parallel reflector cavity, the quick photoelectric detector in position that are arranged at respectively in the casing; Wherein:
Said piezoelectric ceramics heap lies in a horizontal plane in the bottom of casing; Said piezoelectric membrane places the upper surface of piezoelectric ceramics heap; One end of said elastic cantilever is connected with piezoelectric membrane, and the other end is fixed on the right side wall of casing, and said laser instrument is fixed on casing top and the perpendicular position of elastic cantilever; Institute's quick photoelectric detector of rheme is vertically fixed on the left side wall of casing, and said parallel reflector cavity level places between the quick photoelectric detector of elastic cantilever and position.
3. the electronics mutual inductance device based on piezoelectric ceramics according to claim 1 is characterized in that, said data acquisition unit comprises simulated modulation circuit, analog to digital converter, the digital signal processing circuit that connects successively;
Wherein: said simulated modulation circuit carries out power amplification and phase correction to the low-voltage signal of optical detection unit output; Said analog to digital converter is converted into digital low voltage signal with the simulation low voltage signal of simulated modulation circuit output; Said digital signal processing circuit is gathered the parameter of digital low voltage signal, calculates amplitude, the phase place of low voltage signal.
4. the electronic voltage mutual inductance device based on piezoelectric ceramics according to claim 1 is characterized in that said signal output unit comprises signal display module and secondary device; Wherein: secondary device is by the digital low voltage signal power supply of data acquisition unit output, the parameter value of the real-time display digit low voltage signal of display module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110443203.4A CN102435822B (en) | 2011-12-27 | 2011-12-27 | Piezoelectric ceramic-based electronic voltage mutual induction device |
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| CN201110443203.4A CN102435822B (en) | 2011-12-27 | 2011-12-27 | Piezoelectric ceramic-based electronic voltage mutual induction device |
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| CN102435822A true CN102435822A (en) | 2012-05-02 |
| CN102435822B CN102435822B (en) | 2014-03-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107315116A (en) * | 2017-06-27 | 2017-11-03 | 南京航空航天大学 | The inverse piezoelectric effect that a kind of utilization PVDF stacks thin piece is realized to the device of DC electric field intensity detection |
| CN112782464A (en) * | 2021-01-07 | 2021-05-11 | 云南电网有限责任公司电力科学研究院 | Voltage measuring device and method based on piezoelectric ceramic micro-deformation image detection |
| CN112798848A (en) * | 2020-12-30 | 2021-05-14 | 南方电网科学研究院有限责任公司 | Voltage measurement system based on inverse piezoelectric effect |
| CN113533977A (en) * | 2021-05-26 | 2021-10-22 | 同济大学 | Method for detecting internal reaction parameters of lithium ion power battery |
Citations (6)
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| JPS6155978A (en) * | 1984-08-27 | 1986-03-20 | Canon Inc | Power supply device |
| US5424935A (en) * | 1993-06-03 | 1995-06-13 | Wu; Donald B. C. | Power converter with a piezoelectric ceramic transformer |
| JPH088472A (en) * | 1994-06-21 | 1996-01-12 | Nec Corp | Piezoelectric ceramic transformer and its driving method |
| CN101552125A (en) * | 2008-12-15 | 2009-10-07 | 北京索控欣博通电气有限公司 | Three-phase electronic voltage mutual inductor (NBEVT) for control |
| CN101556861A (en) * | 2008-12-01 | 2009-10-14 | 魏孝铭 | Piezoelectric ceramic voltage dividing electronic potential transformer |
| CN202453407U (en) * | 2011-12-27 | 2012-09-26 | 东南大学 | Electronic voltage mutual inductance device based on piezoelectric ceramic |
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2011
- 2011-12-27 CN CN201110443203.4A patent/CN102435822B/en not_active Expired - Fee Related
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| JPS6155978A (en) * | 1984-08-27 | 1986-03-20 | Canon Inc | Power supply device |
| US5424935A (en) * | 1993-06-03 | 1995-06-13 | Wu; Donald B. C. | Power converter with a piezoelectric ceramic transformer |
| JPH088472A (en) * | 1994-06-21 | 1996-01-12 | Nec Corp | Piezoelectric ceramic transformer and its driving method |
| CN101556861A (en) * | 2008-12-01 | 2009-10-14 | 魏孝铭 | Piezoelectric ceramic voltage dividing electronic potential transformer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107315116A (en) * | 2017-06-27 | 2017-11-03 | 南京航空航天大学 | The inverse piezoelectric effect that a kind of utilization PVDF stacks thin piece is realized to the device of DC electric field intensity detection |
| CN107315116B (en) * | 2017-06-27 | 2019-11-19 | 南京航空航天大学 | A kind of device that the inverse piezoelectric effect stacking thin piece using PVDF is realized to DC electric field intensity detection |
| CN112798848A (en) * | 2020-12-30 | 2021-05-14 | 南方电网科学研究院有限责任公司 | Voltage measurement system based on inverse piezoelectric effect |
| CN112782464A (en) * | 2021-01-07 | 2021-05-11 | 云南电网有限责任公司电力科学研究院 | Voltage measuring device and method based on piezoelectric ceramic micro-deformation image detection |
| CN113533977A (en) * | 2021-05-26 | 2021-10-22 | 同济大学 | Method for detecting internal reaction parameters of lithium ion power battery |
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| CN102435822B (en) | 2014-03-05 |
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