CN103293272A - Sulfur hexafluoride alarm detector - Google Patents
Sulfur hexafluoride alarm detector Download PDFInfo
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- CN103293272A CN103293272A CN201310167973XA CN201310167973A CN103293272A CN 103293272 A CN103293272 A CN 103293272A CN 201310167973X A CN201310167973X A CN 201310167973XA CN 201310167973 A CN201310167973 A CN 201310167973A CN 103293272 A CN103293272 A CN 103293272A
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Abstract
The invention discloses a sulfur hexafluoride alarm detector, belongs to an alarm device for responding certain conditions and in particular relates to an alarm device for detecting sulfur hexafluoride gas. The sulfur hexafluoride alarm detector comprises a direct current (DC)-DC power supply, a gas sensitive element and a detection circuit, and is characterized in that a gas sampling and signal processing circuit provided with sulfur hexafluoride sensors are connected to a singlechip PIC16F887 serving as a central processor, and the central processor is also connected with an infrared remote keyboard signal acquisition circuit, an RS485 signal output, 4-20mA output and switching value output circuit, a Nixie tube display circuit and an application state indicating circuit. The invention provides a detector for detecting sulfur hexafluoride gas, the sensors arranged at multiple points can be inspected, and when the gas concentration reaches an alarm set value, the alarm is timely given; moreover, multiple signal output modes are adopted, remote control can be realized, and the sulfur hexafluoride alarm detector is important equipment for realizing safety production in departments employing sulfur hexafluoride gas.
Description
Technical field
The invention belongs to the warning device to stable condition response, particularly detect the warning device of sulfur hexafluoride gas.
Background technology
Sulfur hexafluoride has good electrical insulation properties and excellent arc extinction performance.Its electric strength is 2.5 times of nitrogen under the same pressure, and voltage breakdown is 2.5 times of air, and the arc extinguishing ability is 100 times of air, is a kind of UHV (ultra-high voltage) insulating medium material of new generation that is better than between the sky G﹠O.Sulfur hexafluoride is with its good insulation performance performance and arc extinction performance, as: isolating switch, high-tension transformer, sealing gland are closed combined capacitor, hv transmission line, mutual inductor etc.The high-purity sulfur hexafluoride of electron level is electronics etchant desirable in, is widely used in microelectronics technology.Freezing industry is as refrigerant, and the refrigeration scope can be between-45 ℃～0 ℃.Electrical industry is utilized its very high dielectric strength and good arc performance of going out, as the insulating material of high-voltage switch gear, high-power transformer, high-tension cable and gas.Mining industry is used for mine coal dust replace oxygen as anti-adsorption agent.High-purity SF6 also because of its chemical inertness, nontoxic, do not fire and non-corrosiveness, also be widely used in metal smelt (as the magnesium alloy melting furnace blanket gas), Aero-Space, medical treatment (X-ray machine, laser machine), meteorological (tracer analysis), chemical industry (battle wagon tire, novel fire extinguisher) etc.Along with current development of science and technology, the field that SF6 relates to is constantly expanded, by increasing basic field and sciemtifec and technical sphere widespread use.But along with its danger of sulfur hexafluoride widespread use also begins to receive publicity, though the pure product of sulfur hexafluoride are nontoxic substantially, in the product as mix low sulfur fluoride, hydrogen fluoride, particularly during ten sulfur fluorides, then toxicity strengthens.The personnel health there is lethal effect and can infringement be arranged to equipment, cause more serious security incident, the equipment of the detection sulfur hexafluoride that market in urgent need is flexible.
Summary of the invention
A kind of sulfur hexafluoride detection alarm instrument easy to carry that provides is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of sulfur hexafluoride detection alarm instrument, comprise DC-DC power supply, gas sensor, testing circuit, it is characterized in that: the gas sampling of sulfur hexafluoride sensor and signal processing circuit are housed are connected on the single-chip microcomputer PIC16F887 as central processing unit, central processing unit is also connecting infrared remote control keyboard signal Acquisition Circuit, the output of RS485 signal, 4-20mA output and switching value output circuit, the charactron display circuit uses condition indication circuit.
Described DC-DC power supply is for using LM2575-ADJ (IC1) chip, convert 24V to 6V, 3 pin of LM2575-ADJ and 5 pin ground connection, practical electrochemical capacitor E1 is 24V filtering between 1 pin and the ground, and 2 pin and diode IN5819 (D1) form the PWM oscillating circuit, and 4 pin are the feedback pin, L3 and E2 form output filter circuit, by ASM1117-5 (IC2) the 6V voltage transitions is become 5V again, on input pin and ground, add two electric capacity E3, E4 between output pin and the ground respectively.
Described gas sampling circuit and the signal processing circuit that the sulfur hexafluoride sensor is housed, the pin 25 of single-chip microcomputer connects sensor signal and exports 3 pins, and connect the 5V pull-up resistor by a 10K resistance, between sensor 6V power supply ground, add a SMBJ-8C1A discharge tube.
Described infrared remote control keyboard signal Acquisition Circuit, 3,2 pins of infrared receiving terminal connect the 5V power supply respectively, GND, and connect a C22 capacitor filtering, 1 pin connects single-chip microcomputer 21 pins.
Described signal output apparatus comprises switching value output, 4-20mA output, and RS485 exports three kinds of modes,
The switching value output circuit is: single-chip microcomputer 23 pins are by the base stage of R4 connection triode Q1, and 5V connects the Q1 collector, 5V relay control pin one end ground connection, a termination Q1 emitter;
The 4-20mA output circuit is: PWM is through two RC wave filters for the output of single-chip microcomputer 36 pins, and optional 0R resistance, 1M resistance enters 5 pins of LM258 (IC5), and LM258 pin 6 is by the 1M resistance eutral grounding, and 7 pins connect the Q2 base stage by R30 resistance, the Q2 collector meets 24V, emitter meets R29, and another pin of R29 connects LM258 pin 6, and LM258 pin 5 links to each other with L4 by a 1M resistance, the Q1 emitter links to each other with L4 with R27 by R28, and the L4 other end is exportable 4-20mA;
The RS485 output circuit is: single-chip microcomputer 1 pin, and 44 pins, 22 pins are respectively at 1 of IC4,4,2 link to each other with 3 pins, and IC4 pin 8 connects the 5V power supply, 5 pins meet GND, 7 pins are drop-down by R22, and 6 pins are by drawing on the R23, and respectively by discharge tube BS1, BS2 ground connection, cross PTC1, PTC2 and R25, R25 are output as between signal B and signal A line and A, the B and select the output distance by R24 and J1.
Described use condition indication circuit, the pin 15 of single-chip microcomputer, pin 17, pin 19, pin 20 are connected to pilot lamp LED1, LED2, LED3, LED4 negative electrode by resistance R 18, R19, R20, R21, and the anode of LED1, LED2, LED3, LED4 connects power supply.
Described charactron display circuit passes through R16 by 8,9,10,11 pins of single-chip microcomputer, R15, R14, R13 is connected respectively to Q6, Q5, Q4, the base stage of Q3, four transistor collectors connect the sheet choosing end that power supply 5V emitter connects charactron, 5,4,3 of single-chip microcomputer, 2,41,40,39, the control of 38 pins is by resistance R 5, R6, R7, R8, R9, R10, R11, R12 connect the data bit of charactron.
Using method of the present invention: after detector installs, check that power lead and each connection terminal line are accurate, report to the police, control performance sensitive reliable after, can come into operation.
1, connect power supply, the power-on switch, instrument enters preheat mode, and detector shows "-" successively.
2, after one minute, preheating finishes, and instrument enters normal operating conditions.
3, the address shows: under normal monitor state,, click " broadcast " key then with the hand-held remote controller align display screens, the show bus address number.
4, monitor procedure, when monitored scene had gas to leak, the concentration on this road showed that numerical value increases, when gas concentration reached alarm setting value, alarm lamp was bright, started the alarm linkage device simultaneously.
5, drop to alarm set point when following when gas concentration, alarm lamp goes out, and contact output is simultaneously removed.
6, fault diagnosis: when with the sensor Communications failure after malfunction indicator lamp bright and show " E---".After fault was got rid of, instrument recovered normal monitor state, and fault shows disappearance, and malfunction indicator lamp is extinguished.
The invention has the beneficial effects as follows provides a kind of detector that detects sulfur hexafluoride gas, can patrol and examine the sensor that is laid in multiple spot, and when gas concentration reached alarm setting value, alarm lamp was bright, started the alarm linkage device simultaneously.And be provided with multiple mode signal output, and can realize Remote, be to use the visual plant of department's realization safety in production of sulfur hexafluoride gas.This equipment can be used as a probe node of Internet of Things, and standard signal output can carry audible-visual annunciator, and on-the-spot highlighted demonstration is arranged, and all provides reliable solution for the personnel of keeping the scene intact and concentrated gas security monitoring.
Description of drawings
Fig. 1 is structure block diagram of the present invention,
Fig. 2 is central processing unit among Fig. 1, charactron display circuit and use condition indication circuit synoptic diagram,
Fig. 3 is infrared remote controller figure among Fig. 1,
Fig. 4 is DC-DC power circuit diagram of the present invention,
Fig. 5 is gas sampling circuit and signal processing circuit circuit diagram among Fig. 1,
Fig. 6 is switching value output circuit circuit diagram among Fig. 1,
Fig. 7 is RS485 signal output apparatus circuit diagram among Fig. 1,
Fig. 8 is 4-20mA output circuit circuit diagram.
Among the figure, 1.485 signal access devices 2. are equipped with gas sampling and the signal processing circuit of sulfur hexafluoride sensor, 3. infrared remote control keyboard signal Acquisition Circuit, 4. central processing unit, 5. charactron display device, the output of 6.RS485 signal, 4-20mA output and switching value output circuit.
Embodiment
The specific embodiment of the present invention is, as shown in the figure:
Described DC-DC power supply is for using LM2575-ADJ (IC1) chip, convert 24V to 6V, 3 pin of LM2575-ADJ and 5 pin ground connection, practical electrochemical capacitor E1 is 24V filtering between 1 pin and the ground, and 2 pin and diode IN5819 (D1) form the PWM oscillating circuit, and 4 pin are the feedback pin, L3 and E2 form output filter circuit, by ASM1117-5 (IC2) the 6V voltage transitions is become 5V again, on input pin and ground, add two electric capacity E3, E4 between output pin and the ground respectively.
Described gas sampling circuit and the signal processing circuit that the sulfur hexafluoride sensor is housed, the pin 25 of single-chip microcomputer connects sensor signal and exports 3 pins, and connect the 5V pull-up resistor by a 10K resistance, between sensor 6V power supply ground, add a SMBJ-8C1A discharge tube.
Described infrared remote control keyboard signal Acquisition Circuit, 3,2 pins of infrared receiving terminal connect the 5V power supply respectively, GND, and connect a C22 capacitor filtering, 1 pin connects single-chip microcomputer 21 pins.
Described signal output apparatus comprises switching value output, 4-20mA output, and RS485 exports three kinds of modes,
The switching value output circuit is: single-chip microcomputer 23 pins are by the base stage of R4 connection triode Q1, and 5V connects the Q1 collector, 5V relay control pin one end ground connection, a termination Q1 emitter;
The 4-20mA output circuit is: PWM is through two RC wave filters for the output of single-chip microcomputer 36 pins, and optional 0R resistance, 1M resistance enters 5 pins of LM258 (IC5), and LM258 pin 6 is by the 1M resistance eutral grounding, and 7 pins connect the Q2 base stage by R30 resistance, the Q2 collector meets 24V, emitter meets R29, and another pin of R29 connects LM258 pin 6, and LM258 pin 5 links to each other with L4 by a 1M resistance, the Q1 emitter links to each other with L4 with R27 by R28, and the L4 other end is exportable 4-20mA;
The RS485 output circuit is: single-chip microcomputer 1 pin, and 44 pins, 22 pins are respectively at 1 of IC4,4,2 link to each other with 3 pins, and IC4 pin 8 connects the 5V power supply, 5 pins meet GND, 7 pins are drop-down by R22, and 6 pins are by drawing on the R23, and respectively by discharge tube BS1, BS2 ground connection, cross PTC1, PTC2 and R25, R25 are output as between signal B and signal A line and A, the B and select the output distance by R24 and J1.
Described use condition indication circuit, the pin 15 of single-chip microcomputer, pin 17, pin 19, pin 20 are connected to pilot lamp LED1, LED2, LED3, LED4 negative electrode by resistance R 18, R19, R20, R21, and the anode of LED1, LED2, LED3, LED4 connects power supply.
Described charactron display circuit passes through R16 by 8,9,10,11 pins of single-chip microcomputer, R15, R14, R13 is connected respectively to Q6, Q5, Q4, the base stage of Q3, four transistor collectors connect the sheet choosing end that power supply 5V emitter connects charactron, 5,4,3 of single-chip microcomputer, 2,41,40,39, the control of 38 pins is by resistance R 5, R6, R7, R8, R9, R10, R11, R12 connect the data bit of charactron.
Using method of the present invention: after detector installs, check that power lead and each connection terminal line are accurate, report to the police, control performance sensitive reliable after, can come into operation.
1, connect power supply, the power-on switch, instrument enters preheat mode, and detector shows "-" successively.
2, after one minute, preheating finishes, and instrument enters normal operating conditions.
3, the address shows: under normal monitor state,, click " broadcast " key then with the hand-held remote controller align display screens, the show bus address number.
4, monitor procedure, when monitored scene had gas to leak, the concentration on this road showed that numerical value increases, when gas concentration reached alarm setting value, alarm lamp was bright, started the alarm linkage device simultaneously.
5, drop to alarm set point when following when gas concentration, alarm lamp goes out, and contact output is simultaneously removed.
6, fault diagnosis: when with the sensor Communications failure after malfunction indicator lamp bright and show " E---".After fault was got rid of, instrument recovered normal monitor state, and fault shows disappearance, and malfunction indicator lamp is extinguished.
Claims (8)
1. sulfur hexafluoride detection alarm instrument, comprise DC-DC power supply, gas sensor, testing circuit, it is characterized in that: the gas sampling of sulfur hexafluoride sensor and signal processing circuit are housed are connected on the single-chip microcomputer PIC16F887 as central processing unit, central processing unit is also connecting infrared remote control keyboard signal Acquisition Circuit, the output of RS485 signal, 4-20mA output and switching value output circuit, the charactron display circuit uses condition indication circuit.
2. according to the determined sulfur hexafluoride detection alarm of claim 1 instrument, it is characterized in that: described DC-DC power supply is for using LM2575-ADJ (IC1) chip, convert 24V to 6V, 3 pin of LM2575-ADJ and 5 pin ground connection, practical electrochemical capacitor E1 is 24V filtering between 1 pin and the ground, 2 pin and diode IN5819 (D1) form the PWM oscillating circuit, 4 pin are the feedback pin, L3 and E2 form output filter circuit, by ASM1117-5 (IC2) the 6V voltage transitions is become 5V again, on input pin and ground, add two electric capacity E3, E4 between output pin and the ground respectively.
3. according to the determined sulfur hexafluoride detection alarm of claim 1 instrument, it is characterized in that: described gas sampling circuit and the signal processing circuit that the sulfur hexafluoride sensor is housed, the pin 25 of single-chip microcomputer connects sensor signal and exports 3 pins, and connect the 5V pull-up resistor by a 10K resistance, between sensor 6V power supply ground, add a SMBJ-8C1A discharge tube.
4. according to the determined sulfur hexafluoride detection alarm of claim 1 instrument, it is characterized in that: described infrared remote control keyboard signal Acquisition Circuit, 3 of infrared receiving terminal, 2 pins connect the 5V power supply respectively, GND, and connect a C22 capacitor filtering, 1 pin connects single-chip microcomputer 21 pins.
5. according to the determined sulfur hexafluoride detection alarm of claim 1 instrument, it is characterized in that: described signal output apparatus, comprise switching value output, 4-20mA output, RS485 exports three kinds of modes,
The switching value output circuit is: single-chip microcomputer 23 pins are by the base stage of R4 connection triode Q1, and 5V connects the Q1 collector, 5V relay control pin one end ground connection, a termination Q1 emitter;
The 4-20mA output circuit is: PWM is through two RC wave filters for the output of single-chip microcomputer 36 pins, and optional 0R resistance, 1M resistance enters 5 pins of LM258 (IC5), and LM258 pin 6 is by the 1M resistance eutral grounding, and 7 pins connect the Q2 base stage by R30 resistance, the Q2 collector meets 24V, emitter meets R29, and another pin of R29 connects LM258 pin 6, and LM258 pin 5 links to each other with L4 by a 1M resistance, the Q1 emitter links to each other with L4 with R27 by R28, and the L4 other end is exportable 4-20mA;
The RS485 output circuit is: single-chip microcomputer 1 pin, and 44 pins, 22 pins are respectively at 1 of IC4,4,2 link to each other with 3 pins, and IC4 pin 8 connects the 5V power supply, 5 pins meet GND, 7 pins are drop-down by R22, and 6 pins are by drawing on the R23, and respectively by discharge tube BS1, BS2 ground connection, cross PTC1, PTC2 and R25, R25 are output as between signal B and signal A line and A, the B and select the output distance by R24 and J1.
6. according to the determined sulfur hexafluoride detection alarm of claim 1 instrument, it is characterized in that: described use condition indication circuit, the pin 15 of single-chip microcomputer, pin 17, pin 19, pin 20 are connected to pilot lamp LED1, LED2, LED3, LED4 negative electrode by resistance R 18, R19, R20, R21, and the anode of LED1, LED2, LED3, LED4 connects power supply.
7. according to the determined sulfur hexafluoride detection alarm of claim 1 instrument, it is characterized in that: described charactron display circuit, by 8,9,10 of single-chip microcomputer, 11 pins pass through R16, R15, and R14, R13 is connected respectively to Q6, Q5, Q4, the base stage of Q3, four transistor collectors connect the sheet choosing end that power supply 5V emitter connects charactron, 5,4 of single-chip microcomputer, 3,2,41,40,39, the control of 38 pins is by resistance R 5, R6, R7, R8, R9, R10, R11, R12 connect the data bit of charactron.
8. the using method of the described sulfur hexafluoride detection alarm of claim 1 instrument is characterized in that: after detector installs, check that power lead and each connection terminal line are accurate, report to the police, control performance sensitive reliable after, can come into operation.
(1) connect power supply, the power-on switch, instrument enters preheat mode, and detector shows "-" successively.
After (2) one minutes, preheating finishes, and instrument enters normal operating conditions.
(3) address shows: under normal monitor state,, click " broadcast " key then with the hand-held remote controller align display screens, the show bus address number.
(4) monitor procedure, when monitored scene had gas to leak, the concentration on this road showed that numerical value increases, when gas concentration reached alarm setting value, alarm lamp was bright, started the alarm linkage device simultaneously.
(5) drop to alarm set point when following when gas concentration, alarm lamp goes out, and contact output is simultaneously removed.
(6) fault diagnosis: when with the sensor Communications failure after malfunction indicator lamp bright and show " E---".After fault was got rid of, instrument recovered normal monitor state, and fault shows disappearance, and malfunction indicator lamp is extinguished.
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| CN201310167973XA CN103293272A (en) | 2013-05-09 | 2013-05-09 | Sulfur hexafluoride alarm detector |
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| CN201310167973XA CN103293272A (en) | 2013-05-09 | 2013-05-09 | Sulfur hexafluoride alarm detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370796A (en) * | 2016-11-17 | 2017-02-01 | 福建闽高电力股份有限公司 | SF6 gas leakage detection and control circuit |
| CN107436161A (en) * | 2016-05-27 | 2017-12-05 | 四方特变电工智能电气有限公司 | Transformer information remote transmitting data acquisition device |
| CN109238574A (en) * | 2018-10-31 | 2019-01-18 | 国网山东省电力公司潍坊供电公司 | A kind of intelligence sulfur hexafluoride leak detection apparatus |
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| EP0338185A2 (en) * | 1988-04-20 | 1989-10-25 | Felten & Guilleaume Energietechnik AG | Apparatus with an optical gas detector for measuring the concentration of gases and for monitoring them |
| JPH04243498A (en) * | 1991-01-17 | 1992-08-31 | Mitsubishi Electric Corp | Sulfur hexafluoride gas sealing load switch equipped with gas monitor |
| CN2898824Y (en) * | 2006-06-08 | 2007-05-09 | 汪献忠 | Quantitative SF gas leakage detector |
| CN101358947A (en) * | 2008-09-22 | 2009-02-04 | 河南省日立信电子有限公司 | Intelligent SF6 gas sensor |
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| CN203241400U (en) * | 2013-05-09 | 2013-10-16 | 济南市长清计算机应用公司 | Sulfur hexafluoride alarm detector |
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2013
- 2013-05-09 CN CN201310167973XA patent/CN103293272A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0338185A2 (en) * | 1988-04-20 | 1989-10-25 | Felten & Guilleaume Energietechnik AG | Apparatus with an optical gas detector for measuring the concentration of gases and for monitoring them |
| JPH04243498A (en) * | 1991-01-17 | 1992-08-31 | Mitsubishi Electric Corp | Sulfur hexafluoride gas sealing load switch equipped with gas monitor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436161A (en) * | 2016-05-27 | 2017-12-05 | 四方特变电工智能电气有限公司 | Transformer information remote transmitting data acquisition device |
| CN106370796A (en) * | 2016-11-17 | 2017-02-01 | 福建闽高电力股份有限公司 | SF6 gas leakage detection and control circuit |
| CN109238574A (en) * | 2018-10-31 | 2019-01-18 | 国网山东省电力公司潍坊供电公司 | A kind of intelligence sulfur hexafluoride leak detection apparatus |
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Application publication date: 20130911 |