CN105892329A - Sulfur hexafluoride gas and derivative gas monitoring and control device - Google Patents
Sulfur hexafluoride gas and derivative gas monitoring and control device Download PDFInfo
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- CN105892329A CN105892329A CN201410597332.2A CN201410597332A CN105892329A CN 105892329 A CN105892329 A CN 105892329A CN 201410597332 A CN201410597332 A CN 201410597332A CN 105892329 A CN105892329 A CN 105892329A
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- sulfur hexafluoride
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Abstract
The invention relates to a sulfur hexafluoride gas and derivative gas monitoring and control device. The device is mainly formed by an upper computer, a draught fan, an alarm device, a system host and a plurality of transmitters connected to the system host. Each transmitter is connected to the host respectively through a CAN bus. The host is connected to the upper computer, a linked draught fan and the alarm device respectively. In the device, a double-channel double-detection comparison sulfur hexafluoride gas and derivative gas concentration monitoring circuit is designed so that reliability is greatly increased. The structure of the device is light, installation and usage maintenance are convenient and the device possesses other characteristics. The device is the ideal and novel sulfur hexafluoride gas and derivative gas content monitoring and control device.
Description
Technical field
The invention belongs to industrial sulfur hexafluoride gas monitoring field, refer more particularly to a kind of device applying two-way double detection high-pressure modular constant voltage discharge method that sulfur hexafluoride gas and derivative gas-monitoring thereof are monitored.
Technical background
nullSulfur hexafluoride gas has good arc extinguishing and insulation function，Therefore，Sulfur hexafluoride gas is widely used in power equipment，Such as sulfur hexafluoride gas primary cut-out，Sulfur hexafluoride gas switchgear，Pipeline bus etc. pure sulfur hexafluoride gas is a kind of colourless，Tasteless，Nontoxic，The halogen compounds of difficult combustion，In the case of less than 150 DEG C，Sulfur hexafluoride gas is chemical inertness，But at large power electric arc，Under spark and electric discharge corona effect，Sulfur hexafluoride gas can decompose and dissociate multiple poisonous and corrosive substance. therefore，In using sulfur hexafluoride gas power equipment，The performance of the leakage of sulfur hexafluoride gas not only switching devices has affected，The more importantly harm to human body of the toxic breakdown thing and the heavy damage to environment. for above-mentioned reasons，Sulfur hexafluoride gas power equipment is carried out strict monitoring and protection，To ensure manpower，Equipment，The safety of environment is just particularly important.
The optical detection apparatus of this sulfur hexafluoride gas concentration, has light emitting devices, light path device, gas channels selector, inlet channel, outlet passageway and gas input passage to be measured；The inside of light path device has narrowband light filter, power attenuator, beam splitter, transmitting device, air inlet, gas outlet and reference light outlet；The axial line of the light place straight line that the light emission end of light emitting devices is launched and light path device is on same straight line；Gas input passage is surveyed in the gas input passage input to be measured reception of gas channels selector, and the gas input passage outfan to be measured of gas channels selector taps into QI KOU through inlet channel；Gas outlet connects outlet passageway and is connected with the external world.Use infrared light Optical devices that sulfur hexafluoride gas concentration is measured, have measure wide ranges, highly sensitive, precision is high, fast response time, have good selectivity, can carry out the particular advantages such as continuous analysis.But this apparatus structure is the most complicated, and specific to sulfur hexafluoride gas, and can not other harmful derivative gas of sulfur hexafluoride gas can only be detected simultaneously by this optical detection apparatus simultaneously.
Summary of the invention
It is an object of the invention to overcome above-mentioned weak point of the prior art to provide a kind of and apply two-way double detection high-pressure modular constant voltage discharge method to measure the device to sulfur hexafluoride gas and derivative gas content monitoring by discharge current.
The present invention realizes in the following way: be mainly made up of host computer, blower fan, alarm device, system host and multiple transmitters of being attached thereto；Each transmitter is connected with main frame respectively by CAN, and main frame is connected with host computer and the blower fan and the alarm device that link the most respectively.
When sulfur hexafluoride gas leaks, gas is because walking downwards than great, it is arranged in ground transmitter sensing acquisition device to cause changed by discharge current by gathering sulfur hexafluoride gas, the corresponding sulfur hexafluoride gas of analytical calculation and derivative gas concentration thereof, and arranged by system, make to carry out reporting to the police and air-exhausting function at set point, it is achieved to the person and the protection of equipment safety.High pressure constant voltage module 1 and high pressure constant voltage module 2 operation controlled by transmitter mainboard CPU it is respectively mounted in transmitter, carry out electrion in real time, the change of electric current is caused when sulfur hexafluoride gas and derivative gas thereof are close to pick-up harvester, in transmitter, sensing acquisition device is by gathering being changed by discharge current caused by sulfur hexafluoride gas, it is sent to main frame through the conversion of Signal Pretreatment A/D, host CPU is analyzed receiving data, rejecting abnormalities data also enable the detection of another road comparison transmitter sample acquisitions, after host analysis calculates and revises, analytical calculation draws corresponding precisely sulfur hexafluoride gas and derivative gas concentration thereof, data show on liquid crystal display screen, and arranged by system, data are made to carry out when set point transfinites reporting to the police and air-exhausting function, realize the person and the protection of equipment safety.
In sum, the present invention is to improve sulfur hexafluoride gas and the stability of derivative gas concentration monitoring thereof and reliability, the present invention devises two-way double detection comparison sulfur hexafluoride gas and derivative gas concentration observation circuit thereof, when the Monitoring Data of main sulfur hexafluoride gas and derivative gas concentration observation circuit thereof is had a question, automatically the sulfur hexafluoride gas and the derivative gas concentration observation circuit thereof that start comparison are compared, and substantially increase reliability.Multiple transmitter can be connected, the independent monitoring capacity in multiple regions of tool, and can such as take a breath multiple objects blower fan, temperature-dropping fan etc. realize coordinated signals；And there is data recording function, and name kind to be reported to the police and the action of control object carries out record preservation, record has a power failure and does not loses；Can dock with software for substation monitoring and control configuration by connecting corresponding bitcom, it is achieved the remote signalling of system, remote measurement, telemetry function；The present invention also has the features such as light structure, installation and working service convenience simultaneously, is a kind of preferable novel sulfur hexafluoride gas and the device of derivative gas content monitoring thereof.
Accompanying drawing explanation
The construction module schematic diagram of Fig. 1 present invention；
Fig. 2 host hardware system of the present invention construction module schematic diagram；
The hardware system structure module diagram of Fig. 3 transmitter of the present invention；
Detailed description of the invention
In conjunction with the detailed description specific embodiment of the invention:
As it is shown in figure 1, the present invention is mainly made up of host computer 12, blower fan 13, alarm device 14, system host 11 and multiple transmitters 15 of being attached thereto；Each transmitter 15 is connected with system host 11 respectively by CAN, and blower fan 13 and report alarm device 14 that system host 11 with host computer 12 and links the most respectively are connected.
As shown in Figure 2, present system main frame 11 mainly includes that cabinet, LCD interface circuit 27, touch-screen display 22, mainboard CPU21, calendar clock device 23, voice device 24, nonvolatile memory 25, A/M arrange switch 30 and output driving circuit 31, host power supply 26 and the driving means 28,29 being connected respectively with blower fan 13 and alarm 14.
Wherein:
1, the CPU that mainboard CPU21 uses is LPC2292, is the embedded type CPU of the ARM7 series that NXP company produces, and LPC2292 uses the crystal oscillator of 12MHZ, generates 60MHZ clock signal for total system through PLL circuit 5 frequency multiplication.The address space of LPC2292 is divided into built-in and outside two parts, and the pin of LPC2292 is divided into tetra-parts of P0, P1, P2, P3.
2, LCD interface circuit 27
The present invention uses intelligent LCD display, and main frame uses parallel interface to control it.For improving transmission speed, the data division of this parallel interface is directly connected with the data/address bus of system.
3, nonvolatile memory 25
The present invention uses the 62WV5128 static memory with backup battery as nonvolatile memory, preserves the historical record data of system, and this memorizer has the capacity of 512K byte, can preserve a large amount of historical record data.For ensureing transmission speed, the data of this static memory and address interface are all directly connected with system bus.
4, calendar clock device circuit 23
The present invention uses the M41TO calendar clock circuit of ST company, shares backup battery with static memory 62WV5128, is connected with LPC2292.
5, voice device circuit 24
The present invention uses ISD1420 to be storage and playback circuit, and LM386 is power amplifier.
6, A/M arranges switch 30 and output driving circuit 31
The present invention arranges the state of switch by GPIO input A/M；Output then exports control signal by GPIO, controls relay output after MC1413 amplifies.
7, power circuit 26
The present invention uses 12V direct current supply, and point 2 tunnels work for main frame each several part:
1.. use the Switching Power Supply output 5V voltage of MC34063 composition, work for interface circuit, then export 3.3V and 1.8V voltage through LDO voltage stabilizer, for cpu interface circuit and Core Operational
2. .12V DC voltage is for LCD display, voice amplification circuit and power output circuit
As it is shown on figure 3, transmitter of the present invention mainly includes cabinet, gathers sensor, data mainboard CPU31, high-pressure modular 32, conditioning circuit module 33, A/D input module 34.Described collection sensor includes: sulfur hexafluoride gas and derivative gas sensor 35, humidity sensor 36, oxygen amount sensor 37, H2S sensor 38, SO2 sensor 39 and temperature sensor 40；Wherein data mainboard CPU31 uses LPC2119, is the embedded type CPU of the ARM7 series that NXP company produces, and LPC2119 uses the crystal oscillator of 12MHZ, generates 60MHZ clock signal for total system through PLL circuit 5 frequency multiplication.Temperature sensor 40 is directly connected with mainboard CPU 31, and sulfur hexafluoride gas and derivative gas sensor 35 thereof, humidity sensor 36, oxygen amount sensor 37, H2S sensor 38, SO2 sensor 39 are all connected with mainboard CPU 31 through A/D input module 34 by conditioning circuit module 33；High-pressure modular is divided into high-pressure modular one and high-pressure modular two, mainboard CPU31 control high-pressure modular one respectively and be connected with the operation of high-pressure modular two and with sulfur hexafluoride gas and derivative gas sensor 35 thereof.
1.A/D interface circuit
The present invention uses 10 A/D analog-digital converters of LPC2119, and owing to LPC2119 only has 4 road A/D converters, therefore system extends 1 CD4501 analog switching circuit.
2. sulfur hexafluoride gas testing circuit
Sulfur hexafluoride gas observation circuit uses high-pressure modular constant voltage discharge method, is measured the content of sulfur hexafluoride gas by discharge current.For improving stability and the reliability of sulfur hexafluoride gas monitoring, have employed following 2 improved methods:
1.. add standby sulfur hexafluoride gas observation circuit, to the Monitoring Data of main sulfur hexafluoride gas observation circuit with suspicion time, automatically start standby sulfur hexafluoride gas observation circuit and compare, improve reliability；
2.. the high-pressure modular constant voltage discharge of sulfur hexafluoride gas observation circuit is carried out energy restriction, reduces the consumption of sensor.
High-pressure modular 1 and the operation of high-pressure modular 2 is controlled respectively by LPC2119.Due to the circuit structure of high-pressure modular, the output voltage of sulfur hexafluoride gas observation circuit and habituation require different, use the method for software computing to solve.3. oxygen amount, humidity, H2S and SO2 testing circuit
4. temperature sensing circuit
Temperature sensing circuit have employed the temperature sensor of DS18B20 digital interface, is directly controlled and read detected value by GPIO, and precision is higher but detection speed is slower.
5. power circuit
The present invention uses 24V direct current supply, and point 2 tunnels work for transmitter each several part:
1.. use the Switching Power Supply output 5V voltage of MC34063 composition, work for interface circuit, then export 3.3V and 1.8V voltage through LDO voltage stabilizer, for cpu interface circuit and Core Operational
2.. use MC7812 voltage stabilizing output 12V voltage, for sulfur hexafluoride gas high voltage power supply.
Host-host protocol between main frame of the present invention and transmitter
Invention system main frame-transmitter transmits based on CAN2.OB agreement, and for taking into account transmission speed and distance, the baud rate of selection is 50Kbps, and transmission range is up to 1200 meters, and transmission uses master slave system.
Host computer of the present invention and the communication protocol of system host
Host computer 12 uses standard RS-232 or RS-485 communication standard with the communication of system host 11, and baud rate is 9600, uses 11 forms having band odd.Host-host protocol uses master slave system, and host computer is as main control end, and as Partner hereinafter referred to as, all operations is said the word system host by host computer, and system host is as wait-for-response.
Sulfur hexafluoride gas observation circuit uses high-pressure modular constant voltage discharge method, it is respectively mounted high pressure constant voltage module one and high pressure constant voltage module two in transmitter and is controlled to run by transmitter mainboard CPU31, carry out electrion in real time, the change of the magnitude of current is caused when sulfur hexafluoride gas and derivative gas thereof are close to pick-up harvester, in transmitter 15, sensing acquisition device is by gathering being changed by discharge current caused by sulfur hexafluoride gas, it is sent to system host 11 through the conversion of Signal Pretreatment A/D, is measured the content of sulfur hexafluoride gas by discharge current.For improving stability and the reliability of sulfur hexafluoride gas monitoring, add standby sulfur hexafluoride gas observation circuit, to the Monitoring Data of main sulfur hexafluoride gas observation circuit with suspicion time, automatically start standby sulfur hexafluoride gas observation circuit and compare, improve reliability.Active and standby sulfur hexafluoride gas observation circuit changing method is as follows:
1.. after system start-up, first by main sulfur hexafluoride gas observation circuit；
2.. when the output of main sulfur hexafluoride gas observation circuit is less than 1.25V, attempt standby sulfur hexafluoride gas observation circuit；
3.. if the output of standby sulfur hexafluoride gas observation circuit is more than 1.25V, it is switched to standby sulfur hexafluoride gas observation circuit；
4.. after using standby observation circuit 16 times, attempt main sulfur hexafluoride gas observation circuit, as recovered normal, then switch back into main sulfur hexafluoride gas observation circuit.
When sulfur hexafluoride gas leaks, gas is because walking downwards than great, it is arranged in ground transmitter sensing acquisition device to cause changed by discharge current by gathering sulfur hexafluoride gas, the corresponding sulfur hexafluoride gas of analytical calculation and derivative gas concentration thereof, and arranged by system, make to carry out reporting to the police and air-exhausting function at set point, it is achieved to the person and the protection of equipment safety.nullHigh pressure constant voltage module one and high pressure constant voltage module two operation controlled by transmitter mainboard CPU31 it is respectively mounted in transmitter of the present invention，Carry out electrion in real time，The change of electric current is caused when sulfur hexafluoride gas and derivative gas thereof are close to pick-up harvester，In transmitter, sensing acquisition device is by gathering being changed by discharge current caused by sulfur hexafluoride gas，It is sent to system host 11 through the conversion of Signal Pretreatment A/D，Host CPU 21 is analyzed receiving data，Rejecting abnormalities data also enable the detection of another road comparison transmitter sample acquisitions，After host analysis calculates and revises，Analytical calculation draws corresponding precisely sulfur hexafluoride gas and derivative gas concentration thereof，Data show on liquid crystal display screen，And arranged by system，Data are made to carry out when set point transfinites reporting to the police and air-exhausting function，Realize the person and the protection of equipment safety.Due to the circuit structure of high pressure constant voltage module, the output voltage of sulfur hexafluoride gas observation circuit and habituation require different, use the method for software computing to solve.Before measuring, first must affect change at laboratory measure the high-pressure modular constant voltage discharge magnitude of current is corresponding with sulfur hexafluoride gas and derivative gas concentration thereof, corresponding curve table is obtained by measurement, computer-assisted analysis is utilized to calculate, available corresponding data situation, this data cases measures corresponding equivalent as host CPU, calculates sulfur hexafluoride gas and derivative gas concentration data thereof by discharge current.
Claims (3)
1. a sulfur hexafluoride gas and the device of derivative gas-monitoring monitoring thereof, it is characterised in that: main by upper
Position machine (12), blower fan (13), alarm device (14), system host (11) and the multiple transmitters (15) being attached thereto
Composition；Each transmitter (15) is connected with system host (11) respectively by CAN, and system host (11) also divides
Not it is not connected with host computer (12) and the blower fan (13) and the alarm device (14) that link.
A kind of sulfur hexafluoride gas the most according to claim 1 and the device of derivative gas-monitoring monitoring thereof,
It is characterized in that: described system host (11) mainly includes cabinet, LCD interface circuit (27), touches screen display
Show device (22), mainboard CPU (21), calendar clock device (23), voice device (24), nonvolatile memory
(25), A/M arrange switch (30) and output driving circuit (31), host power supply (26) and respectively with blower fan (13)
The driving means (28) that is connected with alarm device (14), (29).
A kind of sulfur hexafluoride gas the most according to claim 2 and the device of derivative gas-monitoring monitoring thereof,
It is characterized in that: described transmitter (15) mainly includes cabinet, gathers sensor, data mainboard
CPU LPC2119 (31), high-pressure modular (32), conditioning circuit module (33), A/D input module (34)；Institute
The collection sensor stated includes: sulfur hexafluoride gas and derivative gas sensor (35), humidity sensor
(36), oxygen amount sensor (37), H2S sensor (38), SO2 sensor (39) and temperature sensor (40)；
Temperature sensor (40) is directly connected with mainboard CPU LPC2119 (31), sulfur hexafluoride gas and derivative gas thereof
Sensor (35), humidity sensor (36), oxygen amount sensor (37), H2S sensor (38), SO2 sensor
(39) all by conditioning circuit module (33) through A/D input module (34) and mainboard CPU LPC2119 (31) phase
Even；High-pressure modular (32) is divided into high-pressure modular one and high-pressure modular two, by mainboard CPULPC2119 (31) respectively
Control high-pressure modular one and the operation of high-pressure modular two and with sulfur hexafluoride gas and derivative gas sensor (35) thereof
It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410597332.2A CN105892329A (en) | 2014-10-23 | 2014-10-23 | Sulfur hexafluoride gas and derivative gas monitoring and control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410597332.2A CN105892329A (en) | 2014-10-23 | 2014-10-23 | Sulfur hexafluoride gas and derivative gas monitoring and control device |
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| Publication Number | Publication Date |
|---|---|
| CN105892329A true CN105892329A (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410597332.2A Pending CN105892329A (en) | 2014-10-23 | 2014-10-23 | Sulfur hexafluoride gas and derivative gas monitoring and control device |
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| CN (1) | CN105892329A (en) |
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Application publication date: 20160824 |
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