CN209327206U - Sulfur hexafluoride leakage monitor - Google Patents
Sulfur hexafluoride leakage monitor Download PDFInfo
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- CN209327206U CN209327206U CN201821694333.9U CN201821694333U CN209327206U CN 209327206 U CN209327206 U CN 209327206U CN 201821694333 U CN201821694333 U CN 201821694333U CN 209327206 U CN209327206 U CN 209327206U
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- sulfur hexafluoride
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- sensor
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Abstract
The utility model patent is related to a kind of sulfur hexafluoride leakage monitor, for the sulfur hexafluoride in the electrical place such as the switch gear rooms SF6 of various voltage class, combined electrical apparatus room, the gas-monitoring of oxygen.Including infrared sulfur hexafluoride sensor, electrochemical oxygen sensor, analog quantity acquisition circuit, telecommunication circuit, main control chip；The infrared sulfur hexafluoride sensor connects main control chip by analog quantity acquisition circuit, and the electrochemical oxygen sensor connects main control chip by analog quantity acquisition circuit；The telecommunication circuit connects main control chip by data transmit-receive line.The utility model is higher than the measuring accuracy of ordinary ultrasonic wave sensor, good reliability, stability are good, realizes the monitoring to sulfur hexafluoride gas and oxygen, is communicated using RS485, using the MODBUS specification of standard, be uploaded to host computer, using more flexible succinct.
Description
Technical field
Should utility model patent be related to a kind of sulfur hexafluoride leakage monitor, belong to electrical area monitoring field.
Background technique
Sulfur hexafluoride (SF6) gas is used widely in the power system with its excellent insulation and arc extinction performance.?
Under normality, SF6 gas is a kind of colourless, tasteless, nontoxic inert gas, but under the action of high-voltage arc, this gas meeting
It decomposes, can also generate some extremely toxic substances after encountering moisture, be such as fluorinated thionyl (SOF2), sulfur tetrafluoride (SF4), difluoro
Change sulphur (SF2) etc., people's unnatural death can be caused micro similar extremely toxic substance, therefore its safety receives common concern.
" electrical safe working order " special provision: the electrical room equipped with SF6 equipment must assure that SF6 gas concentration
Less than 1000ppm, in addition to it must install sharp draft device, it is necessary to oxygen content instrument and SF6 gas the leakage report that installation can alarm
The monitoring devices such as alert instrument.And equipment component at this stage uses ultrasonic sensor, exists and carbon dioxide is accidentally detected as hexafluoro
The case where changing sulphur, oxygen sensor is not in place there is also filtering, and generates jump, causes accidentally to alert, influence the stable operation of equipment.
Utility model content
The purpose of this utility model is that having and surveying in view of the above-mentioned problems, providing a kind of sulfur hexafluoride leakage monitor
Amount accuracy height, good reliability, stability are good, realize the monitoring to sulfur hexafluoride gas and oxygen.
In order to realize the purpose, the following technical scheme of use is realized:
A kind of sulfur hexafluoride leakage monitor, including infrared sulfur hexafluoride sensor, electrochemical oxygen sensor, simulation
Measure Acquisition Circuit, telecommunication circuit, main control chip；The infrared sulfur hexafluoride sensor is connected by analog quantity acquisition circuit and is led
Chip is controlled, the electrochemical oxygen sensor connects main control chip by analog quantity acquisition circuit；The telecommunication circuit is logical
Cross data transmit-receive line connection main control chip.
As a preferred solution, the infrared sulfur hexafluoride sensor is detected using infrared spectroscopy to sulfur hexafluoride
Gas is identified, by internal conversion output voltage signal, connects main control chip by analog quantity acquisition circuit.
As a preferred solution, chemistry occurs for the electrochemical oxygen sensor instead using working electrode and oxygen
It answers, and generates the monitoring that the voltage signal directly proportional to gas concentration realizes oxygen concentration, electrochemical oxygen sensor monitors oxygen
The voltage signal that gas concentration produces is connected to main control chip by analog quantity acquisition circuit.
As a preferred solution, the analog quantity acquisition circuit includes signal conditioning circuit and amplifying circuit；Letter
Number conditioning circuit carries out signal filtering to electrochemical oxygen sensor and the collected voltage signal of infrared sulfur hexafluoride sensor,
Amplifying circuit is transmitted to main control chip after amplifying voltage signal.
As a preferred solution, the telecommunication circuit is made of communication chip and peripheral circuit, communication chip and
Peripheral circuit is isolated by communication isolation circuit with external communication interface, and the communication isolation circuit is by photoelectric isolated chip
And peripheral circuit composition, the outer communication interface are connect with main control chip.
As a preferred solution, the model SN75LBC184 of the communication chip, the Phototube Coupling core
The model 6N136 of piece, the main control chip use STC12C5A60S2.
The utility model the utility model has the advantages that
Compared with prior art, the utility model has the following beneficial effects:
The utility model is higher than the measuring accuracy of ordinary ultrasonic wave sensor, good reliability, stability are good, realizes to six
The monitoring of sulfur fluoride gas and oxygen, is communicated using RS485, using the MODBUS specification of standard, host computer is uploaded to, using more
Add flexible, succinct.
Detailed description of the invention
Fig. 1 is the utility model structure connection diagram；
Fig. 2 is 1 analog quantity acquisition circuit of the utility model embodiment；
Fig. 3 is 1 communication isolation circuit of the utility model embodiment；
Fig. 4 is the communication of the utility model embodiment 1 and peripheral circuit.
Specific embodiment
Referring to 1~Fig. 4 of Figure of description, the utility model provides a kind of sulfur hexafluoride leakage monitor, including infrared
Sulfur hexafluoride sensor, electrochemical oxygen sensor, analog quantity acquisition circuit, telecommunication circuit, main control chip；Described is infrared by six
It is fluorinated sulfer sensor and main control chip is connected by analog quantity acquisition circuit, the electrochemical oxygen sensor is adopted by analog quantity
Collector connects main control chip；The telecommunication circuit connects main control chip by data transmit-receive line.
As a preferred solution, the infrared sulfur hexafluoride sensor is detected using infrared spectroscopy to sulfur hexafluoride
Gas is identified, by internal conversion output voltage signal, connects main control chip by analog quantity acquisition circuit.
As a preferred solution, chemistry occurs for the electrochemical oxygen sensor instead using working electrode and oxygen
It answers, and generates the monitoring that the voltage signal directly proportional to gas concentration realizes oxygen concentration, electrochemical oxygen sensor monitors oxygen
The voltage signal that gas concentration produces is connected to main control chip by analog quantity acquisition circuit.
As a preferred solution, the analog quantity acquisition circuit includes signal conditioning circuit and amplifying circuit；Letter
Number conditioning circuit carries out signal filtering to electrochemical oxygen sensor and the collected voltage signal of infrared sulfur hexafluoride sensor,
Amplifying circuit is transmitted to main control chip after amplifying voltage signal.
As a preferred solution, the telecommunication circuit is made of communication chip and peripheral circuit, communication chip and
Peripheral circuit is isolated by communication isolation circuit with external communication interface, and the communication isolation circuit is by photoelectric isolated chip
And peripheral circuit composition, the outer communication interface are connect with main control chip.
As a preferred solution, the model SN75LBC184 of the communication chip, the Phototube Coupling core
The model 6N136 of piece, the main control chip use STC12C5A60S2.
As shown in Fig. 2, analog quantity acquisition circuit is made of high-operational amplifier and signal conditioning circuit, electrochemical oxygen sensing
Device and infrared sulfur hexafluoride sensor output voltage signal, after following circuit filtering by amplifier, by amplifying circuit, are connected to
Main control chip.Main control chip carries out glide filter processing according to the signal of input, prevents data from generating jump.
As shown in figure 3, receive and dispatch line and control line by isolating chip 6N136 isolated data, with this be isolated single-chip microcontroller with it is upper
The communication of position machine, improves anti-interference and safety；
As shown in figure 4, telecommunication circuit is made of communication chip SN75LBC184 and peripheral circuit, connected by data transmit-receive line
Connect main control chip；Main control chip uses STC12C5A60S2 single-chip microcontroller, and external crystal-controlled oscillation is equipped with house dog, and system is reliable and stable；
When work:
(1) electrochemical oxygen sensor exports weak voltage signals about 0~50mV, and input signal need to amplify by amplifier
It after 100 times, then is sampled by the AD that filter circuit enters main control chip, improves sampling precision and accuracy, prevent simultaneously
Jump.Main control chip internal processes carry out moving average filter to sampled data, that is, a sampling buffer area are established, by AD institute
The data of sampling are successively stored, and after data adopt full buffer area, are removed maximum value, minimum value other data and are averaged work
For current oxygen data.After having new data to be filled into next, by earliest data cover, data calculating is same as described above,
It realizes that data steadily change with this software filtering, prevents jump from generating with exceptional value once in a while.
(2) infrared sulfur hexafluoride sensor output signal has been subjected to enhanced processing, exportable 0.4~2V voltage, output letter
Number have been subjected to part filtering processing.Therefore output signal, which directly passes through filter circuit and enters the another way AD of main control chip, is adopted
Sample.Main control chip internal processes, are filtered sampled data.
(3) device, which powers on, has automatic calibration function, for adapting to the air regime of current environment.It is i.e. that present air is dense
Degree is defaulted as normal atmosphere concentration, the acquisition of calibrating die analog quantity.
Claims (6)
1. a kind of sulfur hexafluoride leakage monitor, which is characterized in that passed including infrared sulfur hexafluoride sensor, electrochemical oxygen
Sensor, analog quantity acquisition circuit, telecommunication circuit, main control chip；The infrared sulfur hexafluoride sensor passes through analog acquisition
Circuit connection main control chip, the electrochemical oxygen sensor connect main control chip by analog quantity acquisition circuit；Described
Telecommunication circuit connects main control chip by data transmit-receive line.
2. a kind of sulfur hexafluoride leakage monitor according to claim 1, which is characterized in that the infrared sulfur hexafluoride
Sensor identifies sulfur hexafluoride gas using infrared spectroscopy detection, by internal conversion output voltage signal, passes through mould
Analog quantity Acquisition Circuit connects main control chip.
3. a kind of sulfur hexafluoride leakage monitor according to claim 1, which is characterized in that the electrochemical oxygen passes
Sensor is chemically reacted using working electrode with oxygen, and is generated the voltage signal directly proportional to gas concentration and realized that oxygen is dense
The monitoring of degree, the voltage signal that electrochemical oxygen sensor monitoring oxygen concentration produces, is connected by analog quantity acquisition circuit
To main control chip.
4. a kind of sulfur hexafluoride leakage monitor according to claim 1, it is characterised in that: the analog acquisition
Circuit includes signal conditioning circuit and amplifying circuit；Signal conditioning circuit passes electrochemical oxygen sensor and infrared sulfur hexafluoride
The collected voltage signal of sensor carries out signal filtering, and amplifying circuit is transmitted to main control chip after amplifying voltage signal.
5. a kind of sulfur hexafluoride leakage monitor according to claim 1, it is characterised in that: the telecommunication circuit by
Communication chip and peripheral circuit composition, communication chip and peripheral circuit by communication isolation circuit and external communication interface carry out every
From the communication isolation circuit is made of photoelectric isolated chip and peripheral circuit, and the outer communication interface is connect with main control chip.
6. a kind of sulfur hexafluoride leakage monitor according to claim 5, it is characterised in that: the communication chip
Model SN75LBC184, the model 6N136 of the photoelectric isolated chip, the main control chip use
STC12C5A60S2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821694333.9U CN209327206U (en) | 2018-10-18 | 2018-10-18 | Sulfur hexafluoride leakage monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821694333.9U CN209327206U (en) | 2018-10-18 | 2018-10-18 | Sulfur hexafluoride leakage monitor |
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| Publication Number | Publication Date |
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| CN209327206U true CN209327206U (en) | 2019-08-30 |
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| CN201821694333.9U Active CN209327206U (en) | 2018-10-18 | 2018-10-18 | Sulfur hexafluoride leakage monitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432803A (en) * | 2021-07-06 | 2021-09-24 | 厦门加华电力科技有限公司 | Qualitative and quantitative integrated leak detector |
-
2018
- 2018-10-18 CN CN201821694333.9U patent/CN209327206U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432803A (en) * | 2021-07-06 | 2021-09-24 | 厦门加华电力科技有限公司 | Qualitative and quantitative integrated leak detector |
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