CN103604483B - Method for measuring oil level of oil charging insulator of electric power system through ultrasonic waves - Google Patents
Method for measuring oil level of oil charging insulator of electric power system through ultrasonic waves Download PDFInfo
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- CN103604483B CN103604483B CN201310628787.1A CN201310628787A CN103604483B CN 103604483 B CN103604483 B CN 103604483B CN 201310628787 A CN201310628787 A CN 201310628787A CN 103604483 B CN103604483 B CN 103604483B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000012212 insulator Substances 0.000 title claims abstract description 21
- 239000000523 sample Substances 0.000 claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 230000001360 synchronised effect Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 28
- 239000010729 system oil Substances 0.000 claims description 7
- 230000005284 excitation Effects 0.000 claims description 4
- 239000007822 coupling agent Substances 0.000 claims description 2
- 229910052573 porcelain Inorganic materials 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 abstract 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 2
- 230000000052 comparative effect Effects 0.000 abstract 1
- 238000002604 ultrasonography Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention relates to a method for measuring an oil level of an oil charging insulator of an electric power system through ultrasonic waves. The method comprises the steps that a pulse signal is generated by a synchronous circuit for triggering a scanning circuit and a transmitting circuit; an electric pulse is generated by the transmitting circuit and added to a radiating probe so that the ultrasonic waves can be transmitted by the radiating probe; after the reflected waves are received by a receiving probe, an electric signal is generated; amplification and wave detection are conducted on the electric signal from the receiving probe by a receiving amplification circuit; A/D conversion is conduced on the electric signal by a single chip microcomputer, preset value comparative judgment is conducted on the signal, and the signal is sent to a display screen; a detecting result is displayed by the display screen; the two probes are placed perpendicularly and tightly attached to the side wall of the insulator; continuous detection is conducted through the method that the two probes are vertically and gradually moved in the perpendicular direction; liquid level judgment is conducted. According to the method, measurement of the oil level in the insulator is achieved, the accuracy is high, and operation is simple and convenient.
Description
Technical field
The invention belongs to power system oil-filled insulator oil level technical field of ultrasonic measurement, especially a kind of oil-filled insulator of power system
Oil level ultrasonic wave measuring method.
Background technology
Insulator is important power equipment, is filled with insulating oil in insulator, and oil mass is crossed that I haven't seen you for ages and make power system produce abnormal, even leads
Cause device damage and produce wide-area power outage accident.Can observe internal oil level conventionally by the glass vision panel on sleeve pipe, but transport
After row certain time, form can be polluted by the impurity in oil, environment etc., causes being normally observed oil level；Also can basis
DL664-2008 charging equipment infrared diagnostics application code requirement, oil level in employing infrared method observation sleeve pipe, but the party at present
Method is affected by extraneous factors such as ambient temperatures, around Electromagnetic Interference, causes testing result deviation occur, there is certain limitation.
Summary of the invention
It is an object of the invention to for the deficiencies in the prior art, and propose a kind of power system oil-filled insulator oil level ultrasonic measurement side
Method.
The present invention solves it and technical problem is that and take techniques below scheme to realize:
A kind of power system oil-filled insulator oil level ultrasonic wave measuring method, comprises the following steps that
(1) synchronous circuit produces pulse signal for driver sweep circuit and radiating circuit；
(2) radiating circuit produces electric pulse and is added on transmitting probe, the piezoelectric chip vibration of excitation transmitting probe, launches ultrasonic
Ripple；
(3), after receiving transducer receives echo, echo is become the signal of telecommunication by the piezoelectric chip in probe；
(4) receive amplifying circuit the signal of telecommunication from receiving transducer is amplified, detection；
(5) single-chip microcomputer carries out A/D conversion to the signal of telecommunication, and processes signal, when the signal sent into is more than the safety preset
During value, signal just sent by single-chip microcomputer, drives display screen bright, i.e. represents that there is oil this position；
(6) testing result is shown by display screen；
(7) transmitting probe and receiving transducer being kept in the same horizontal line, two probe verticals are close to insulator sidewall and are placed；
(8) vertical direction progressively moves up and down two probe positions and carries out continuous detecting, and detecting position is set to the adjacent full skirt of insulator sidewall two
Between space；
(9) liquid level judges；If certain position testing result shows oil, and detects the detection of position above the next-door neighbour's full skirt of its top
Result display oil-free, then at the full skirt between two detection positions of the explanation oil interface.
And, the electric pulse that electric pulse is a few hectovolt supreme kilovolt order of magnitude that described step (2) radiating circuit produces.
And, the reception amplifying circuit in described step (4) includes attenuator, amplifier and cymoscope.
And, described step (7) is when two probe placement, at detection position daubing coupling agent.
Advantages of the present invention and good effect are
The inventive method uses ultrasonic wave measuring method, utilizes the acoustic impedance difference of solid-gas and solid-liquid interface to carry out oil level in sleeve pipe
Measuring, use the method can realize the mensuration of oil level in sleeve pipe, accuracy rate is high, easy and simple to handle.
Accompanying drawing explanation
Fig. 1 is the hardware system schematic circuit that the inventive method uses；
Fig. 2 is acoustic reflection and the schematic diagram of transmission on two media interface；
Fig. 3 is the placement location schematic diagram of probe in the inventive method.
Detailed description of the invention
Implementing to be further described to the present invention below in conjunction with accompanying drawing, following example are illustrative, are not determinate,
Protection scope of the present invention can not be limited with this.
The ultimate principle of the present invention
We define constant Z0=ρ0c0For the characteristic impedance of medium, it is entirely by character (Media density and this medium of medium
In the velocity of sound) determine, with the ripple of Propagation unrelated.
When ultrasound wave is impinged perpendicularly on interface by medium I, if the characteristic impedance of two media is respectively Z1=ρ1c1And Z2=
ρ2c2, owing to the characteristic impedance on separating surface both sides is different, just there is reflection and the transmission of sound wave, as shown in Figure 2.
Definition reflection R, its value is the ratio of echo and incidence wave sound pressure amplitudes；Coefficient of refraction D, its value is refracted wave
Ratio with incidence wave sound pressure amplitudes.Can be obtained by according to two boundary conditions on wave equation and separating surface:
By two formulas above it will be seen that its value depends entirely on the characteristic impedance of two media, illustrate that the characteristic impedance of medium is to sound
Propagate and have important impact.The characteristic impedance value difference of two media is bigger, and its reflection coefficient is the biggest, and echo is very strong, reflection
Energy is the biggest；Otherwise two dielectric attribute impedances are nearer, and reflection coefficient is the least, and echo is the most weak, incident acoustic wave can major part enter
In second medium.
For solid-air interface, due to acoustic impedance widely different (4～5 orders of magnitude of general difference), extreme portions energy is reflected
Return；For solid-liquid interface, acoustic impedance differs less (typically on the same order of magnitude), and part energy is reflected back toward, another
Portion of energy is transmitted in a liquid until decaying.According to the size of the energy being reflected back, the mensuration of liquid level can be realized.
Circuit produces high frequency electric pulse, and electric oscillation acts on probe, and the piezoelectric chip generation inverse piezoelectric effect in incentive probe will
The signal of telecommunication is converted into acoustical signal and launches to insulator, and ultrasound wave passes insulator sidewall, if this position does not has oil, ultrasound wave solid-
Liquid extreme portions energy is reflected back toward；If there is oil this position, ultrasound wave is reflected back toward in solid-liquid interface portion of energy；It is reflected back
Ultrasound wave popped one's head in and received and the piezoelectric chip that acts in probe, excitation piezoelectric chip generation direct piezoelectric effect produces the signal of telecommunication,
The signal of telecommunication is amplified and detection, and through single-chip microcomputer analytical calculation, can have not according in the size detection insulator of the energy being reflected back
There is oil.
A kind of power system oil-filled insulator oil level ultrasonic wave measuring method, as it is shown in figure 1, the measuring circuit that the method uses includes
Synchronous circuit, radiating circuit, single-chip microcomputer, reception amplifying circuit, display screen, power supply and transmitting probe and receiving transducer.
The method step is as follows:
(1) synchronous circuit produces pulse signal: synchronous circuit produces thousands of pulses per second, is used for triggering radiating circuit；
(2) pulse signal that radiating circuit is produced by synchronous circuit utilizes thyratron or the silicon controlled switch spy of himself after triggering
Property, produce the electric pulse of the supreme kilovolt of a few hectovolt and be added on respectively on two probes, the piezoelectric chip vibration of excitation transmitting probe,
Launch ultrasound wave；
(3), after receiving transducer receives echo, echo is become the signal of telecommunication by the piezoelectric chip in probe；
(4) by attenuator, amplifier and cymoscope form receive amplifying circuit the signal of telecommunication from receiving transducer is amplified,
Detection；
(5) single-chip microcomputer carries out A/D conversion to the signal of telecommunication, and processes signal, when the signal sent into is more than the safety preset
During value, signal just sent by single-chip microcomputer, drives display screen bright, i.e. represents that there is oil this position；
(6) include that the signal of telecommunication is shown by the display screen of display circuit and oscilloscope tube；
The placement of (7) two probes, is close to probe vertical insulator sidewall and places, and smears a small amount of couplant in detection position；
Due to the particularity of oil-filled porcelain bushing sleeve full skirt shape, full skirt contact surface area is too small, it is impossible to place probe, so probe is put
It is placed between two full skirts on sidewall, as it is shown on figure 3,
(8) vertical direction progressively moves up and down two probe positions and carries out continuous detecting, and detecting position is set to the adjacent full skirt of insulator sidewall two
Between space；
(9) liquid level judges；If certain position testing result shows oil, and detects the detection of position above the next-door neighbour's full skirt of its top
Result display oil-free, then at the full skirt between two detection positions of the explanation oil interface.
Claims (1)
1. a power system oil-filled insulator oil level ultrasonic wave measuring method, it is characterised in that comprise the following steps that
(1) synchronous circuit produces pulse signal for driver sweep circuit and radiating circuit；
(2) radiating circuit produces electric pulse and is added on transmitting probe, the piezoelectric chip vibration of excitation transmitting probe, launches ultrasonic
Ripple, wherein, the electric pulse that electric pulse is hundreds of volt of voltage supreme kilovolt voltage amount level that radiating circuit produces；
(3), after receiving transducer receives echo, echo is become the signal of telecommunication by the piezoelectric chip in probe；
(4) receive amplifying circuit the signal of telecommunication from receiving transducer is amplified, detection, wherein, receive amplifying circuit include
Attenuator, amplifier and cymoscope；
(5) single-chip microcomputer carries out A/D conversion to the signal of telecommunication, and processes the signal of telecommunication, when send into the signal of telecommunication more than preset
During safety value, the signal of telecommunication just sent by single-chip microcomputer, drives display screen bright, i.e. represents that this position does not has oil；
(6) testing result is shown by display screen；
(7) transmitting probe and receiving transducer being individually positioned on the sidewall between upper and lower two full skirts, two probe verticals are close to porcelain
Set sidewall is placed, during two probe placement, at detection position daubing coupling agent；
(8) vertical direction progressively moves up and down two probe positions and carries out continuous detecting, and detecting position is set to the adjacent full skirt of insulator sidewall two
Between space；
(9) liquid level judges；If certain position testing result shows oil, and detects the detection of position above the next-door neighbour's full skirt of its top
Result display oil-free, then at the full skirt between two detection positions of the explanation oil interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310628787.1A CN103604483B (en) | 2013-11-29 | 2013-11-29 | Method for measuring oil level of oil charging insulator of electric power system through ultrasonic waves |
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| CN201310628787.1A CN103604483B (en) | 2013-11-29 | 2013-11-29 | Method for measuring oil level of oil charging insulator of electric power system through ultrasonic waves |
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| CN103604483A CN103604483A (en) | 2014-02-26 |
| CN103604483B true CN103604483B (en) | 2017-01-11 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121966B (en) * | 2014-06-23 | 2018-08-10 | 北京中电兴发科技有限公司 | A kind of outside measuring liquid level detection device and method |
| CN105987737A (en) * | 2015-02-13 | 2016-10-05 | 中国科学院声学研究所 | Ultrasonic liquid level detector and detection method |
| CN105486379B (en) * | 2015-12-30 | 2018-10-19 | 黑龙江省科学院技术物理研究所 | Adjustable sigmatron backscattering article position measuring method |
| CN105806449B (en) * | 2016-03-10 | 2017-05-17 | 陕西师范大学 | Method for detecting dielectric liquid level in closed porcelain cover through ultrasonic non-interventive method |
| CN105606181B (en) * | 2016-03-14 | 2017-03-29 | 陕西师范大学 | The method of oil level in a kind of oil-filled insulator of ultrasound detection |
| CN106840314B (en) * | 2017-02-09 | 2019-04-19 | 广东电网有限责任公司东莞供电局 | A kind of electric system Buchholz relay oil level indicating means and device |
| CN110763309B (en) * | 2018-07-27 | 2021-02-19 | 国网福建省电力有限公司漳州供电公司 | Method for measuring oil level of transformer oil conservator based on double ultrasonic detection |
| FR3092168B1 (en) * | 2019-01-24 | 2021-08-06 | Dehon Sa | System and method for measuring by acoustic waves the filling level of a fluid reservoir |
| CN110736522A (en) * | 2019-08-26 | 2020-01-31 | 广西电网有限责任公司电力科学研究院 | oil level detection method for sealed oil-filled equipment |
| CN113588045B (en) * | 2021-07-08 | 2022-06-24 | 浙江新图维电子科技有限公司 | System and method for detecting oil level of cable oil filling terminal based on ultrasonic ranging |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5105661A (en) * | 1989-12-28 | 1992-04-21 | Kureha Chemical Industry Company, Limited | Method of detecting a level of liquid in a moving cylindrical body |
| JPH11218436A (en) * | 1998-01-30 | 1999-08-10 | Toshiba Corp | Ultrasonic liquid level measuring device |
| CN1348091A (en) * | 2001-11-19 | 2002-05-08 | 武汉大学 | supersonic method of detecting the fixed-point liquid level in container |
| CN102322920A (en) * | 2011-08-24 | 2012-01-18 | 四川大学 | Method for measuring existence of powdery materials in specific material position of container and implementation material level switch thereof |
| WO2012154237A1 (en) * | 2011-02-04 | 2012-11-15 | Cidra Corporate Services Inc. | Optimizing acoustic efficiency of a sonic filter or separator |
-
2013
- 2013-11-29 CN CN201310628787.1A patent/CN103604483B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5105661A (en) * | 1989-12-28 | 1992-04-21 | Kureha Chemical Industry Company, Limited | Method of detecting a level of liquid in a moving cylindrical body |
| JPH11218436A (en) * | 1998-01-30 | 1999-08-10 | Toshiba Corp | Ultrasonic liquid level measuring device |
| CN1348091A (en) * | 2001-11-19 | 2002-05-08 | 武汉大学 | supersonic method of detecting the fixed-point liquid level in container |
| WO2012154237A1 (en) * | 2011-02-04 | 2012-11-15 | Cidra Corporate Services Inc. | Optimizing acoustic efficiency of a sonic filter or separator |
| CN102322920A (en) * | 2011-08-24 | 2012-01-18 | 四川大学 | Method for measuring existence of powdery materials in specific material position of container and implementation material level switch thereof |
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| CN103604483A (en) | 2014-02-26 |
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