CN107064293A - SF6 detectors and detection method, compensation method and method of work - Google Patents
SF6 detectors and detection method, compensation method and method of work Download PDFInfo
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- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
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Abstract
The present invention relates to SF6 detectors and detection method, compensation method and method of work, wherein, this SF6 detectors include：Processor module and supersonic sensing device assembly；Wherein supersonic sensing device assembly includes the sense channel for being used to detect SF6 gas concentrations, ultrasonic wave transmitting terminal and ultrasonic wave receiving terminal positioned at sense channel two ends；Processor module is suitable to the acoustic pressure ratio for calculating theoretical sound pressure level and actual measurement sound pressure level, and using the acoustic pressure ratio as SF6 concentration characterization parameter, to calculate the actual concentrations of SF6 gases；This SF6 detectors calculate sound pressure level of the sound wave after the sense channel decay in air as reference value, and survey sound pressure level of the sound wave after testing after channel attenuation, with characterization parameter of both ratio as SF6 concentration, calculate corresponding SF6 concentration, overcome the technical problem that the schemes such as electrochemistry, infrared spectrum are brought, by ultrasonic wave, there is provided accuracy of detection while testing cost is reduced.
Description
Technical field
The present invention relates to a kind of SF6 detectors and detection method, method of work.
Background technology
Sulfur hexafluoride (SF6) is the gas with remarkable electrical insulating property and arc quenching characteristic.The hexafluoro of described low concentration
Change sulphur and refer to sulfur hexafluoride of the concentration in the range of 0 ~ 3000ppm.In power industry, SF6 is widely used in conductance equipment
Series, such as power switch, enclosed capacitor group, transformer.In operation, the leakages of SF6 gases is inevitable, when there is big electricity
When stream cut-offs, because strong arc discharge can produce the subfluoride of some sulfur-bearings in leak scene.These substance reactions
Ability is stronger, can further be reacted with electrode material, hydrone again when having water and oxygen, so as to decompose the poisonous or severe toxicity of generation
Gas.The respiratory system of these toxic gas major determinant human bodies, occurs after poisoning similar to flu, allergic, nausea
The adverse reactions such as vomiting, fatigue, when inhalation dose is big, it may appear that more serious consequence.
Therefore, the content progress detection to SF6 is needed to seem particularly significant in conductance equipment chain.
The content of the invention
It is an object of the invention to provide a kind of SF6 detectors, to pass through the sound of theoretical sound pressure level and actual measurement sound pressure level
Pressure ratio value calculates the actual concentrations of SF6 gases as the characterization parameter of SF6 concentration.
In order to solve the above-mentioned technical problem, the invention provides a kind of SF6 detectors, including：
Processor module and supersonic sensing device assembly；Wherein
The supersonic sensing device assembly includes the sense channel for being used to detect SF6 gas concentrations, positioned at sense channel two ends
Ultrasonic wave transmitting terminal and ultrasonic wave receiving terminal；
The processor module is suitable to the acoustic pressure ratio for calculating theoretical sound pressure level and actual measurement sound pressure level, and using the acoustic pressure ratio as
The characterization parameter of SF6 concentration, to calculate the actual concentrations of SF6 gases.
Further, the acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level is calculated, i.e.,
The processor module is suitable to calculate theoretical sound pressure level of the ultrasonic wave after testing after channel attenuation, and controls ultrasonic wave to send out
Sending end produces the ultrasonic wave of corresponding frequencies, and detects actual measurement of the ultrasonic wave after sense channel is decayed by ultrasonic wave receiving terminal
Sound pressure level, and then calculate the acoustic pressure ratio；And
The actual concentrations of SF6 gases are drawn by the corresponding SF6 concentration of acoustic pressure ratio.
Further, the processor module is also associated with temperature measurement module, to obtain environment temperature by temperature measurement module, and builds
Vertical environment temperature and frequency association model；
Change the frequency of ultrasonic wave by the environment temperature and frequency association model cootrol processor module, realize temperature-compensating.
Further, the frequency range of the ultrasonic wave is 39-41KHZ, i.e.,
The environment temperature and frequency association model are as shown in the table：
| Environment temperature | Frequency |
| 40℃ | 39.6KHZ |
| 35℃ | 39.7KHZ |
| 30℃ | 39.8KHZ |
| 25℃ | 40KHZ |
| 20℃ | 40.15KHZ |
| 15℃ | 40.25KHZ |
| 10℃ | 40.4KHZ |
| 5℃ | 40.5KHZ |
| 0℃ | 40.6KHZ |
| -5℃ | 40.7KHZ |
| -10℃ | 40.8KHZ |
| -15℃ | 40.9KHZ |
Another aspect, detection method is detected present invention also offers a kind of single channel SATT for SF6 detectors.
The single channel SATT detection detection method includes：Calculate the acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level
Value, and using the acoustic pressure ratio as SF6 concentration characterization parameter, to calculate the actual concentrations of SF6 gases.
Further, the acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level is calculated, i.e.,
Theoretical sound pressure level of the ultrasonic wave after testing after channel attenuation is calculated, and controls to produce the ultrasonic wave of corresponding frequencies, and it is logical
Actual measurement sound pressure level of the detection ultrasonic wave after sense channel is decayed is crossed, and then calculates the acoustic pressure ratio；And
The actual concentrations of SF6 gases are calculated, i.e.,
The actual concentrations of SF6 gases are drawn by the corresponding SF6 concentration of acoustic pressure ratio.
The third aspect, present invention also offers a kind of temperature/frequency compensation method for SF6 detectors.
The temperature/frequency compensation method includes：Environment temperature is detected, and sets up environment temperature and frequency association model,
And change the frequency of ultrasonic wave by the environment temperature and frequency association model cootrol processor module, realize temperature-compensating.
Further, the frequency range of the adjustable square wave is 39-41KHZ, i.e.,
The environment temperature and frequency association model are as shown in the table：
| Environment temperature | Frequency |
| 40℃ | 39.6KHZ |
| 35℃ | 39.7KHZ |
| 30℃ | 39.8KHZ |
| 25℃ | 40KHZ |
| 20℃ | 40.15KHZ |
| 15℃ | 40.25KHZ |
| 10℃ | 40.4KHZ |
| 5℃ | 40.5KHZ |
| 0℃ | 40.6KHZ |
| -5℃ | 40.7KHZ |
| -10℃ | 40.8KHZ |
| -15℃ | 40.9KHZ |
Fourth aspect, present invention also offers a kind of method of work of SF6 detectors, to pass through theoretical sound pressure level and actual measurement
The acoustic pressure ratio of sound pressure level calculates the actual concentrations of SF6 gases as the characterization parameter of SF6 concentration.
The method of work of the SF6 detectors, including：
Detect that detection method detects the actual concentrations of SF6 gases by single channel SATT；And
By temperature/frequency compensation method, change the frequency of ultrasonic wave, realize temperature-compensating.
Further, detect that detection method detects that the method for the actual concentrations of SF6 gases includes by single channel SATT：
Calculate the acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level, and using the acoustic pressure ratio as SF6 concentration characterization parameter,
To calculate the actual concentrations of SF6 gases；Wherein
The acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level is calculated, that is, calculates theory of the ultrasonic wave after testing after channel attenuation
Sound pressure level, and control to produce the ultrasonic wave of corresponding frequencies, and by detecting actual measurement sound of the ultrasonic wave after sense channel is decayed
Pressure value, and then calculate the acoustic pressure ratio；And
The actual concentrations of SF6 gases are calculated, i.e., the actual concentrations of SF6 gases are drawn by the corresponding SF6 concentration of acoustic pressure ratio；
By temperature/frequency compensation method, change the frequency of ultrasonic wave, realizing the method for temperature-compensating includes：
Environment temperature is detected, and sets up environment temperature and frequency association model, and passes through the environment temperature and frequency association model
Control processor module changes the frequency of ultrasonic wave, realizes temperature-compensating；Wherein
The frequency range of the ultrasonic wave is 39-41KHZ, i.e.,
The environment temperature and frequency association model are as shown in the table：
| Environment temperature | Frequency |
| 40℃ | 39.6KHZ |
| 35℃ | 39.7KHZ |
| 30℃ | 39.8KHZ |
| 25℃ | 40KHZ |
| 20℃ | 40.15KHZ |
| 15℃ | 40.25KHZ |
| 10℃ | 40.4KHZ |
| 5℃ | 40.5KHZ |
| 0℃ | 40.6KHZ |
| -5℃ | 40.7KHZ |
| -10℃ | 40.8KHZ |
| -15℃ | 40.9KHZ |
The beneficial effects of the invention are as follows SF6 detectors of the invention calculate sound wave and decayed through the sense channel in air
Sound pressure level afterwards surveys sound pressure level of the sound wave after testing after channel attenuation as reference value, dense as SF6 with both ratio
The characterization parameter of degree, calculates corresponding SF6 concentration, and then overcomes the technical problem that the schemes such as electrochemistry, infrared spectrum are brought,
By ultrasonic wave, there is provided accuracy of detection while testing cost is reduced.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the theory diagram of the SF6 detectors of the present invention；
Fig. 2 is that the SF6 concentration of the present invention and acoustic pressure ratio emulate graph of a relation；
Fig. 3 is the environment temperature curve map corresponding with frequency association model of the present invention.
Embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These accompanying drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
Embodiment 1
Specifically, the detection of sulfur hexafluoride applies more at present, principle mainly has the principles such as electrochemistry, infrared spectrum.And it is electrochemical
It is wrong report to learn principle detection SF6 gas major drawbacks, specially tests SF6 currently without a kind of sensor of electrochemical principle, institute
There is the measuring accuracy of gas interference effect electrochemical sensor, the phenomenon such as occur reporting by mistake, and the sensing of infrared spectrum principle
Device is expensive, it is impossible to a wide range of popularization, and more sensitive to humidity ratio, and wrong report is also also easy to produce under high humidity environment.And ultrasonic wave is examined
Survey method is high with regard to cost performance, is difficult by other gases affects, accuracy of detection is high.Therefore this SF6 detectors are declined based on sound wave
Subtract, using the single channel SATT detection scheme without reference channel.
As shown in figure 1, the present embodiment 1 provides a kind of SF6 detectors, including：Processor module and ultrasonic wave are passed
Sensor component；Wherein described ultrasonic sensor component includes the sense channel for being used to detect SF6 gas concentrations, logical positioned at detection
The ultrasonic wave transmitting terminal and ultrasonic wave receiving terminal at road two ends；The processor module is suitable to calculate theoretical sound pressure level and actual measurement acoustic pressure
The acoustic pressure ratio of value, and using the acoustic pressure ratio as SF6 concentration characterization parameter, to calculate the actual concentrations of SF6 gases.
Specifically, the processor module such as, but not limited to uses MCU units, and including 12-Bit AD conversion function
32 microprocessors；32 microprocessor is suitable to one adjustable square wave of output to drive ultrasonic wave transmitting terminal T by drive circuit；
Ultrasonic wave receiving terminal R connects analog filter by wave detector, and the actual measurement sound pressure level of collection is inputted into 12 AD conversion
Row data processing.
The length of sense channel is such as, but not limited to 94mm distance, and its sampling cavity in the supersonic sensing device assembly
Surface perforate is connected with external environment, i.e. the moment keeps consistent with surrounding environment
As an alternative embodiment, the MCU units also by RS485 communication modules by the reality of the SF6 gases of collection
Border concentration is sent to host computer, and/or is received host computer and be equipped with collection period and sampling sensitivity.
Further, the SF6 detectors are powered using full isolation DC/DC, can provide stablize pure after filtering
Power supply.
As shown in Fig. 2 when sense channel length is fixed, the change of SF6 concentration causes theoretical sound pressure level and actual measurement sound
The significant changes of the acoustic pressure ratio of pressure value, and in taken concentration range both voltage ratios with the increase of SF6 concentration
Approximately linear increases, it was demonstrated that using the acoustic pressure ratio by calculating theoretical sound pressure level and actual measurement sound pressure level, and by the acoustic pressure ratio
It is feasible with the actual concentrations for calculating SF6 gases as the characterization parameter of SF6 concentration；Specifically, calculating theoretical sound pressure level
Acoustic pressure ratio with surveying sound pressure level, i.e., described processor module is suitable to calculate theory of the ultrasonic wave after testing after channel attenuation
Sound pressure level, and control ultrasonic wave transmitting terminal to produce the ultrasonic wave of corresponding frequencies, and detect that ultrasonic wave is passed through by ultrasonic wave receiving terminal
The actual measurement sound pressure level crossed after sense channel decay, and then calculate the acoustic pressure ratio；And it is dense by the corresponding SF6 of acoustic pressure ratio
Degree draws the actual concentrations of SF6 gases.
As shown in figure 3, specifically, the processor module is also associated with temperature measurement module, to obtain ring by temperature measurement module
Border temperature, and set up environment temperature and frequency association model；Pass through the environment temperature and frequency association model cootrol processor die
Block changes the frequency of ultrasonic wave, realizes temperature-compensating.
Current ultrasonic sensor is affected by temperature very big, sound of the sound wave after the sense channel decay in air
Pressure value as reference value, in the interval of -15 DEG C to 40 DEG C of temperature range, sound pressure level is changed greatly, and is used as important weighing apparatus
The reference value of accuracy of measurement, any some fluctuation all influences very big for the accuracy of detection of SF6 gases, for SF6 gas
The accuracy of detection of body is unacceptable, in consideration of it, this SF6 detectors are found from analysis in the principle of ultrasonic wave, ultrasound
Wave sensor is in different temperatures environment, and the frequency of ultrasonic sensor is offset, by lot of experimental data, is summarized
Go out ultrasonic sensor and the curve of temperature change, set up environment temperature and frequency association model.
The frequency range of the ultrasonic wave is 39-41KHZ, i.e.,
The environment temperature and frequency association model are as shown in the table：
| Environment temperature | Frequency |
| 40℃ | 39.6KHZ |
| 35℃ | 39.7KHZ |
| 30℃ | 39.8KHZ |
| 25℃ | 40KHZ |
| 20℃ | 40.15KHZ |
| 15℃ | 40.25KHZ |
| 10℃ | 40.4KHZ |
| 5℃ | 40.5KHZ |
| 0℃ | 40.6KHZ |
| -5℃ | 40.7KHZ |
| -10℃ | 40.8KHZ |
| -15℃ | 40.9KHZ |
Environment temperature is found out according to temperature measurement module, the processor module changes the frequency of ultrasonic wave, and such as ambient temperature is 25
DEG C when, the frequency of ultrasonic wave is 40KHZ.
SF6 detectors after being compensated through excess temperature respective frequencies, wide with use environment scope, measurement accuracy is high
Advantage.
It is preferred that, the SF6 detectors be further adapted for use interval row sex work mode, and by take temperature with
The automatic indemnifying measure of frequency, realizes the high advantage of working stability, long lifespan, measurement accuracy.
Embodiment 2
On the basis of embodiment 1, the present embodiment 2 provides a kind of single channel SATT for SF6 detectors and detected
Detection method.
The single channel SATT detects detection method, that is, calculates the acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level
Value, and using the acoustic pressure ratio as SF6 concentration characterization parameter, to calculate the actual concentrations of SF6 gases.
The acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level is calculated, that is, calculates ultrasonic wave after testing after channel attenuation
Theoretical sound pressure level, and control to produce the ultrasonic wave of corresponding frequencies, and by detecting reality of the ultrasonic wave after sense channel is decayed
Sound pressure level is surveyed, and then calculates the acoustic pressure ratio；And calculate the actual concentrations of SF6 gases, that is, pass through acoustic pressure ratio correspondence
SF6 concentration draw the actual concentrations of SF6 gases.
Detected on single channel SATT in the specific implementation of detection method, detailed in Example 1 on calculating reason
By sound pressure level with actual measurement sound pressure level acoustic pressure ratio, and using the acoustic pressure ratio as SF6 concentration characterization parameter, to calculate
The description of the actual concentrations of SF6 gases.
Embodiment 3
On the basis of embodiment 1, the present embodiment 3 additionally provides a kind of temperature/frequency compensation side for SF6 detectors
Method.
The temperature/frequency compensation method, that is, detect environment temperature, and sets up environment temperature and frequency association model, and
Change the frequency of ultrasonic wave by the environment temperature and frequency association model cootrol processor module, realize temperature-compensating.
The frequency range of the adjustable square wave is 39-41KHZ, i.e.,
The environment temperature and frequency association model are as shown in the table：
| Environment temperature | Frequency |
| 40℃ | 39.6KHZ |
| 35℃ | 39.7KHZ |
| 30℃ | 39.8KHZ |
| 25℃ | 40KHZ |
| 20℃ | 40.15KHZ |
| 15℃ | 40.25KHZ |
| 10℃ | 40.4KHZ |
| 5℃ | 40.5KHZ |
| 0℃ | 40.6KHZ |
| -5℃ | 40.7KHZ |
| -10℃ | 40.8KHZ |
| -15℃ | 40.9KHZ |
On the specific implementation of temperature/frequency compensation method, on detection environment temperature in detailed in Example 1, and set up
Environment temperature and frequency association model, and ultrasonic wave is changed by the environment temperature and frequency association model cootrol processor module
Frequency, realize the description of temperature-compensating.
Embodiment 4
On the basis of embodiment 1 to 3, the present embodiment 4 provides a kind of method of work of SF6 detectors, including：
Detect that detection method detects the actual concentrations of SF6 gases by single channel SATT；And
By temperature/frequency compensation method, change the frequency of ultrasonic wave, realize temperature-compensating.
Specifically, detecting that detection method detects that the method for the actual concentrations of SF6 gases includes by single channel SATT：
Calculate the acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level, and using the acoustic pressure ratio as SF6 concentration characterization parameter, in terms of
Calculate the actual concentrations of SF6 gases；The acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level is wherein calculated, that is, calculates ultrasonic wave
Theoretical sound pressure level after channel attenuation, and control to produce the ultrasonic wave of corresponding frequencies after testing, and by detecting that ultrasonic wave passes through
Actual measurement sound pressure level after sense channel decay, and then calculate the acoustic pressure ratio；And calculate the actual concentrations of SF6 gases,
The actual concentrations of SF6 gases are drawn by the corresponding SF6 concentration of acoustic pressure ratio.
By temperature/frequency compensation method, change the frequency of ultrasonic wave, realizing the method for temperature-compensating includes：Detect ring
Border temperature, and environment temperature and frequency association model are set up, and pass through the environment temperature and frequency association model cootrol processor
Module changes the frequency of ultrasonic wave, realizes temperature-compensating；Wherein
The frequency range of the ultrasonic wave is 39-41KHZ, i.e.,
The environment temperature and frequency association model are as shown in the table：
| Environment temperature | Frequency |
| 40℃ | 39.6KHZ |
| 35℃ | 39.7KHZ |
| 30℃ | 39.8KHZ |
| 25℃ | 40KHZ |
| 20℃ | 40.15KHZ |
| 15℃ | 40.25KHZ |
| 10℃ | 40.4KHZ |
| 5℃ | 40.5KHZ |
| 0℃ | 40.6KHZ |
| -5℃ | 40.7KHZ |
| -10℃ | 40.8KHZ |
| -15℃ | 40.9KHZ |
Environment temperature is found out according to temperature measurement module, the processor module changes the frequency of ultrasonic wave, and such as ambient temperature is 25
DEG C when, the frequency of ultrasonic wave is 40KHZ.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (10)
1. a kind of SF6 detectors, it is characterised in that including：
Processor module and supersonic sensing device assembly；Wherein
The supersonic sensing device assembly includes the sense channel for being used to detect SF6 gas concentrations, positioned at sense channel two ends
Ultrasonic wave transmitting terminal and ultrasonic wave receiving terminal；
The processor module is suitable to the acoustic pressure ratio for calculating theoretical sound pressure level and actual measurement sound pressure level, and using the acoustic pressure ratio as
The characterization parameter of SF6 concentration, to calculate the actual concentrations of SF6 gases.
2. SF6 detectors according to claim 1, it is characterised in that
The acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level is calculated, i.e.,
The processor module is suitable to calculate theoretical sound pressure level of the ultrasonic wave after testing after channel attenuation, and controls ultrasonic wave to send out
Sending end produces the ultrasonic wave of corresponding frequencies, and detects actual measurement of the ultrasonic wave after sense channel is decayed by ultrasonic wave receiving terminal
Sound pressure level, and then calculate the acoustic pressure ratio；And
The actual concentrations of SF6 gases are drawn by the corresponding SF6 concentration of acoustic pressure ratio.
3. SF6 detectors according to claim 2, it is characterised in that
The processor module is also associated with temperature measurement module, to obtain environment temperature by temperature measurement module, and sets up environment temperature
With frequency association model；
Change the frequency of ultrasonic wave by the environment temperature and frequency association model cootrol processor module, realize temperature-compensating.
4. SF6 detectors according to claim 3, it is characterised in that
The frequency range of the ultrasonic wave is 39-41KHZ, i.e.,
The environment temperature and frequency association model are as shown in the table：
。
5. a kind of single channel SATT for SF6 detectors detects detection method, it is characterised in that
Calculate the acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level, and using the acoustic pressure ratio as SF6 concentration characterization parameter,
To calculate the actual concentrations of SF6 gases.
6. single channel SATT according to claim 5 detects detection method, it is characterised in that
The acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level is calculated, i.e.,
Theoretical sound pressure level of the ultrasonic wave after testing after channel attenuation is calculated, and controls to produce the ultrasonic wave of corresponding frequencies, and it is logical
Actual measurement sound pressure level of the detection ultrasonic wave after sense channel is decayed is crossed, and then calculates the acoustic pressure ratio；And
The actual concentrations of SF6 gases are calculated, i.e.,
The actual concentrations of SF6 gases are drawn by the corresponding SF6 concentration of acoustic pressure ratio.
7. a kind of temperature/frequency compensation method for SF6 detectors, it is characterised in that
Environment temperature is detected, and sets up environment temperature and frequency association model, and passes through the environment temperature and frequency association model
Control processor module changes the frequency of ultrasonic wave, realizes temperature-compensating.
8. temperature/frequency compensation method according to claim 7, it is characterised in that
The frequency range of the adjustable square wave is 39-41KHZ, i.e.,
The environment temperature and frequency association model are as shown in the table：
。
9. a kind of method of work of SF6 detectors, it is characterised in that including：
Detect that detection method detects the actual concentrations of SF6 gases by single channel SATT；And
By temperature/frequency compensation method, change the frequency of ultrasonic wave, realize temperature-compensating.
10. method of work according to claim 9, it is characterised in that
Detect that detection method detects that the method for the actual concentrations of SF6 gases includes by single channel SATT：
Calculate the acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level, and using the acoustic pressure ratio as SF6 concentration characterization parameter,
To calculate the actual concentrations of SF6 gases；Wherein
The acoustic pressure ratio of theoretical sound pressure level and actual measurement sound pressure level is calculated, that is, calculates theory of the ultrasonic wave after testing after channel attenuation
Sound pressure level, and control to produce the ultrasonic wave of corresponding frequencies, and by detecting actual measurement sound of the ultrasonic wave after sense channel is decayed
Pressure value, and then calculate the acoustic pressure ratio；And
The actual concentrations of SF6 gases are calculated, i.e., the actual concentrations of SF6 gases are drawn by the corresponding SF6 concentration of acoustic pressure ratio；
By temperature/frequency compensation method, change the frequency of ultrasonic wave, realizing the method for temperature-compensating includes：
Environment temperature is detected, and sets up environment temperature and frequency association model, and passes through the environment temperature and frequency association model
Control processor module changes the frequency of ultrasonic wave, realizes temperature-compensating；Wherein
The frequency range of the ultrasonic wave is 39-41KHZ, i.e.,
The environment temperature and frequency association model are as shown in the table：
。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112113718A (en) * | 2020-07-28 | 2020-12-22 | 中国核电工程有限公司 | Method for detecting sealing performance of nuclear power plant hole plugging by using ultrasonic method |
| CN112394106A (en) * | 2020-11-02 | 2021-02-23 | 珠海华瑞诚科技有限公司 | Distribution room system and SF6 gas concentration detection method |
| CN115855171A (en) * | 2023-03-02 | 2023-03-28 | 山东铁马电气科技发展有限公司 | Online monitoring and alarming system for gas in SF6 electrical equipment and implementation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201222055Y (en) * | 2008-05-27 | 2009-04-15 | 成都敏博科技有限公司 | Apparatus for measuring ultrasonic gas concentration |
| CN103414376A (en) * | 2013-07-25 | 2013-11-27 | 北京航天控制仪器研究所 | Internally-arranged angle sensor all-in-one ultrasonic motor servo control system |
| CN104634463A (en) * | 2013-11-07 | 2015-05-20 | 成都艺创科技有限公司 | Temperature detection circuit for ultrasonic ranging temperature compensation |
| CN204346978U (en) * | 2014-12-30 | 2015-05-20 | 江苏久创电气科技有限公司 | A kind of SF 6gas concentration on-Line Monitor Device |
| CN204807512U (en) * | 2015-07-03 | 2015-11-25 | 河北博为电气有限公司 | Two calibration curve SF6 concentration sensing device based on half sealed cavity |
-
2017
- 2017-06-03 CN CN201710410359.XA patent/CN107064293A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201222055Y (en) * | 2008-05-27 | 2009-04-15 | 成都敏博科技有限公司 | Apparatus for measuring ultrasonic gas concentration |
| CN103414376A (en) * | 2013-07-25 | 2013-11-27 | 北京航天控制仪器研究所 | Internally-arranged angle sensor all-in-one ultrasonic motor servo control system |
| CN104634463A (en) * | 2013-11-07 | 2015-05-20 | 成都艺创科技有限公司 | Temperature detection circuit for ultrasonic ranging temperature compensation |
| CN204346978U (en) * | 2014-12-30 | 2015-05-20 | 江苏久创电气科技有限公司 | A kind of SF 6gas concentration on-Line Monitor Device |
| CN204807512U (en) * | 2015-07-03 | 2015-11-25 | 河北博为电气有限公司 | Two calibration curve SF6 concentration sensing device based on half sealed cavity |
Non-Patent Citations (2)
| Title |
|---|
| 郑锡斌等: "《超声压电换能器工作频率的温度自动补偿系统研究》", 《浙江理工大学学报（自然科学版）》 * |
| 颜盛银等: "《基于声波衰减的六氟化硫浓度无线传感器》", 《压电与声光》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112113718A (en) * | 2020-07-28 | 2020-12-22 | 中国核电工程有限公司 | Method for detecting sealing performance of nuclear power plant hole plugging by using ultrasonic method |
| CN112394106A (en) * | 2020-11-02 | 2021-02-23 | 珠海华瑞诚科技有限公司 | Distribution room system and SF6 gas concentration detection method |
| CN115855171A (en) * | 2023-03-02 | 2023-03-28 | 山东铁马电气科技发展有限公司 | Online monitoring and alarming system for gas in SF6 electrical equipment and implementation method |
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