CN209640214U - Infrared spectroscopy sulfur hexafluoride gas detection module - Google Patents
Infrared spectroscopy sulfur hexafluoride gas detection module Download PDFInfo
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- CN209640214U CN209640214U CN201920267266.0U CN201920267266U CN209640214U CN 209640214 U CN209640214 U CN 209640214U CN 201920267266 U CN201920267266 U CN 201920267266U CN 209640214 U CN209640214 U CN 209640214U
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Abstract
The utility model discloses infrared spectroscopy sulfur hexafluoride gas detection modules, it is characterized in that, including being provided with sulfur hexafluoride detection gas chamber in PCB circuit board, infrared light supply and detection sensor are respectively arranged at left and right sides of the sulfur hexafluoride detection gas chamber, the sulfur hexafluoride detection is provided with air inlet pipe and an air outlet pipe on gas chamber end face, the detection sensor is connect with gas sensor driving device, while the gas sensor driving device sends driving signal to detection sensor, receive the detection data of detection sensor, it will test data simultaneously to be sent in signal amplifier, it is sent in high-precision adc after being amplified by signal amplifier, after carrying out analog-to-digital conversion by high-precision adc, it imports data in simulation microcontroller, the simulation microcontroller is connect with data output interface, data are logical Cross data output interface export.
Description
Technical field
The utility model relates to a kind of gas detection analog modules, and in particular to infrared spectroscopy sulfur hexafluoride gas detects mould
Block.
Background technique
Sulfur hexafluoride is a kind of asphyxiant, can have difficulty in breathing, wheeze in higher concentrations, skin and mucous membrane become blue, whole body convulsion
Contraction.After the mixed gas a few minutes for sucking the oxygen of 80% sulfur hexafluoride+20%, human body will appear numb limb, or even asphyxia
It is dead.China provides that the safe level of sulfur hexafluoride gas should be big no more than oxygen content in 6g/m3 or air in operation room air
In 18%；Sulfur hexafluoride (SF6) for gas with good electrical insulation properties and excellent arc extinction performance, electric strength is same
2.5 times of nitrogen under one pressure, breakdown voltage are 2.5 times of air, and arc extinguishing ability is 100 times of air, are a kind of better than sky
Super-pressure insulating dielectric materials of new generation between gas and oil.Since sulfur hexafluoride is with its good insulation performance and arc-extinguishing
Can, it is widely used in breaker, high-tension transformer, sealing gland and closes combined capacitor, hv transmission line, mutual inductor etc..
Sulfur hexafluoride (SF6) gas concentration measurement at present there are many mode, there is sulfur hexafluoride qualitatively and quantitatively to examine first
It surveys.Qualitative detection mainly applies the environment of less demanding to Concentration Testing, and quantitative detection just needs real-time detection to go out ppm concentration
Value, it is desirable that it is higher, it is rare larger.Fast and accurately detection mode only has NDIR non-dispersive infrared to detect skill to quantitative detection at this stage
Art, the advantage of NDIR detector are that high sensitivity, long service life, maintenance workload are few and safe and reliable.
Utility model content
Technical problem to be solved in the utility model is, inspection simple currently with infrared spectroscopy sulfur hexafluoride detection mode
The problems such as survey precision is low, and service life is short and maintenance is big, the utility model aim is to provide infrared spectroscopy sulfur hexafluoride gas
Body detection module, solves the problem above-mentioned.
The utility model is achieved through the following technical solutions:
Infrared spectroscopy sulfur hexafluoride gas detection module, which is characterized in that including being provided with sulfur hexafluoride in PCB circuit board
Gas chamber is detected, is respectively arranged with infrared light supply and detection sensor, the hexafluoro at left and right sides of the sulfur hexafluoride detection gas chamber
Change and be provided with air inlet pipe and an air outlet pipe on sulphur detection gas chamber end face, the detection sensor and gas sensor driving device connect
It connects, while the gas sensor driving device sends driving signal to detection sensor, receives the detection of detection sensor
Data, while will test data and being sent in signal amplifier, it is sent to high precision analogue after amplifying by signal amplifier and turns
In parallel operation, after carrying out analog-to-digital conversion by high-precision adc, import data in simulation microcontroller, the simulation is micro-
Controller is connect with data output interface, and data are exported by data output interface.
The detection of infrared spectroscopy sulfur hexafluoride gas be usually by infrared light supply scan air cavity, using the variation of light source come
Detection is acquired to the content of gas, the sulfur hexafluoride gas concentration in air cavity is directly proportional to the amount of infrared light of absorption, and six
Sulfur fluoride gas concentration is higher, and after infrared light supply shines, the infrared light light that detection sensor can obtain is i.e. lower, passes through
The available content information to sulfur hexafluoride gas concentration of detection sensor, gets concentration of sulfur hexafluoride in detection sensor
It after data, needs to export these data, in order to guarantee that detection data will not be distorted in data transfer, be put by signal
Big device detection data is amplified after by high-precision adc progress analog-to-digital conversion, infrared light analogue data is converted into number
It imports after word signal in simulation microcontroller, is then being exported concentration data by data output interface.
Further, the signal amplifier, high-precision adc and simulation microcontroller connect with voltage source respectively
It connects, stability fundamental is provided and guarantees that data waveform is stablized for signal amplifier and high-precision adc by voltage source, and is same
When to simulation microcontroller provide power supply supply.
Further, the voltage source uses reference voltage source, and the reference voltage source selects the reference voltage of 0~10V
Source can provide low drifting, overstable, low noise reference voltage to link block.
Further, the detection sensor uses non-dispersive infrared detection sensor, is used cooperatively with detection sensor
Gas sensor driving device corresponding use non-dispersive infrared detection sensor.Non-dispersive infrared detection sensor, that is, NDIR is visited
It surveys sensor and temperature-compensating is attached to using dual-beam detection window, so that DATA REASONING stable accuracy, raising, add temperature-compensating
Avoid the occurrence of temperature drift
Further, luminescence chip built in the infrared light supply, the infrared light supply according to frequency built in luminescence chip to
Sulfur hexafluoride detects gas chamber and sends detection infrared waves.
Further, the operating voltage of the data output interface is 3V~5V, transmission rate 500Kbps.
The utility model compared with prior art, has the following advantages and benefits:
1, the utility model infrared spectroscopy sulfur hexafluoride gas detection module, NDIR (non-dispersive infrared) detection sensor are adopted
It is attached to temperature-compensating with dual-beam detection window, so that DATA REASONING stable accuracy, raising, addition temperature-compensating avoids the occurrence of temperature
Degree drift；
2, the utility model infrared spectroscopy sulfur hexafluoride gas detection module, infrared light supply have used the excellent of filtering optical window
Gesture removes background signal interference and improves signal-to-noise ratio, infrared light supply protected under severe use environment, without the parasitic shadow of sample gas
It rings；
3, the utility model infrared spectroscopy sulfur hexafluoride gas detection module, using high-precision adc, ADC is obtained
The amplitude of sense channel and reference channel, ratio is related to gas concentration, improves the data precision.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the utility model embodiment, constitutes the one of the application
Part does not constitute the restriction to the utility model embodiment.In the accompanying drawings:
Fig. 1 is each device connection schematic diagram of the utility model.
Label and corresponding parts title in attached drawing:
1-PCB circuit board, 2- sulfur hexafluoride detection gas chamber, 3- infrared light supply, 4- detection sensor, 5- air inlet pipe, 6- go out
Tracheae, 7- gas sensor driving device, 8- signal amplifier, 9- high-precision adc, 10- voltage source, 11- simulation are micro-
Controller, 12- data output interface.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below with reference to embodiment and attached drawing,
The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model is not intended to limit the scope of the present invention.
Embodiment
As shown in Figure 1, the utility model infrared spectroscopy sulfur hexafluoride gas detection module, which is characterized in that including PCB electricity
It is provided with sulfur hexafluoride detection gas chamber 2 on road plate 1, is respectively arranged with infrared light at left and right sides of the sulfur hexafluoride detection gas chamber 2
Source 3 and detection sensor 4, the sulfur hexafluoride detection are provided with air inlet pipe 5 and escape pipe 6 on 2 end face of gas chamber, and the detection passes
Sensor 4 is connect with gas sensor driving device 7, and the gas sensor driving device 7 sends driving letter to detection sensor 4
Number while, receive the detection data of detection sensor, while will test data and being sent in signal amplifier 8, pass through signal
Amplifier 8 is sent in high-precision adc 9 after amplifying, will after carrying out analog-to-digital conversion by high-precision adc 9
Data import in simulation microcontroller 11, and the simulation microcontroller 11 is connect with data output interface 12, and data pass through data
Output interface 12 exports.
The sulfur hexafluoride detection gas chamber 2 measures tested gas sulfur hexafluoride, and NDIR (non-dispersive infrared) detection passes
Sensor 4 sends detection infrared waves according to program frequency in sulfur hexafluoride detection plenum interior, and NDIR sensor is based on absorbing light
Spectroscopy is theoretical: the specific infrared wavelength of gas absorption, gas concentration is directly proportional to the amount of infrared light of absorption, the infrared light
Source 3 sulfur hexafluoride detection plenum interior according to program frequency send infrared light supply, the air inlet pipe 5, exhaust pipe 6 with it is lithium
Sulphur detects gas chamber connection, NDIR (non-dispersive infrared) the gas sensor driver 7, external sulfur hexafluoride detection gas chamber in
Pcb board control detection sensor, infrared light supply with low frequency driving, the small signal of the signal amplifier 8, sensor output is big
Indention is caused, must amplify and filter, zero shift and low noise make the system processing gas sensor of precision superelevation
Data, the high-precision adc 9, ADC obtain the amplitude of sense channel and reference channel, ratio and gas concentration phase
It closes, the reference voltage source 10, low drifting, overstable, low noise reference voltage source are sensor and high-precision adc
Stability fundamental is provided and guarantees that data waveform is stablized, the precision analog microcontroller 11, ARM CortexTM-M3 32 processing
Device, 6 differential paths, 24 ADC of single channel, 12 DAC of single channel, power consumption 1.0mA, 290 μ A/MHz construct accurate, stable
System.
The entire working method of present specification are as follows: sulfur hexafluoride gas enters to sulfur hexafluoride detection from air inlet pipe first
Gas chamber, luminescence chip built in the infrared light supply 3, the infrared light supply 3 are examined according to frequency built in luminescence chip to sulfur hexafluoride
It surveys gas chamber 2 and sends detection infrared waves, detection sensor may determine that the concentration of sulfur hexafluoride according to the waveform of infrared waves,
Detection sensor carries out data detection acquisition by the control of gas sensor driving device, and detection sensor and gas sensor drive
Dynamic device carries out both-way communication and is amplified after gas sensor driving device obtains the detection data of detection sensor by signal
After device amplifies detection data, analog-to-digital conversion then is being carried out by high-precision adc, by the concentration of analog quantity
Signal is converted into digital signal, is convenient for data transmission, is then connect by the data output being arranged on simulation microcontroller
Mouth exports concentration data.
The signal amplifier 8, high-precision adc 9 and simulation microcontroller 11 are connect with voltage source 10 respectively,
Stability fundamental is provided and guarantees that data waveform is stablized for signal amplifier 8 and high-precision adc 9 by voltage source 10, and is same
When to simulation microcontroller 11 provide power supply supply.
The voltage source 10 uses reference voltage source, and the reference voltage source selects the reference voltage source of 0~10V, can
Low drifting, overstable, low noise reference voltage are provided to link block.Reference voltage source is simultaneously to signal amplifier 8, high-precision
Analog-digital converter 9, the offer energy of precision analog microcontroller 11 are spent, because of high-precision demand, it is desirable to provide stable voltage,
It prevents from causing data distortion in signals transmission.
The detection sensor 4 uses non-dispersive infrared detection sensor, passes with the gas that detection sensor 4 is used cooperatively
Sensor driving device 7 is corresponding to use non-dispersive infrared detection sensor.
The operating voltage of the data output interface 12 is 3V~5V, transmission rate 500Kbps.The data output connects
Mouthful 12,4mA is exported to 20mA driver signal, half-duplex, 500Kbps data rate, 5V or 3V operating voltage.
Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model
Determine the protection scope of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (6)
1. infrared spectroscopy sulfur hexafluoride gas detection module, which is characterized in that lithium including being provided on PCB circuit board (1)
Sulphur detects gas chamber (2), and infrared light supply (3) and detection sensing are respectively arranged at left and right sides of sulfur hexafluoride detection gas chamber (2)
Device (4), the sulfur hexafluoride detection are provided with air inlet pipe (5) and escape pipe (6), the detection sensor on gas chamber (2) end face
(4) it is connect with gas sensor driving device (7), the gas sensor driving device (7) sends to detection sensor (4) and drives
While dynamic signal, the detection data of detection sensor is received, while will test data and being sent in signal amplifier (8), led to
It is sent in high-precision adc (9) after crossing signal amplifier (8) amplification, is carried out by high-precision adc (9)
After analog-to-digital conversion, import data in simulation microcontroller (11), the simulation microcontroller (11) and data output interface
(12) it connects, data are exported by data output interface (12).
2. infrared spectroscopy sulfur hexafluoride gas detection module according to claim 1, which is characterized in that the signal amplification
Device (8), high-precision adc (9) and simulation microcontroller (11) are connect with voltage source (10) respectively, pass through voltage source
(10) provide stability fundamental for signal amplifier (8) and high-precision adc (9) and guarantee data waveform stabilization, and simultaneously to
It simulates microcontroller (11) and power supply supply is provided.
3. infrared spectroscopy sulfur hexafluoride gas detection module according to claim 2, which is characterized in that the voltage source
(10) reference voltage source is used, the reference voltage source selects the reference voltage source of 0~10V, can provide to link block low
Drift, overstable, low noise reference voltage.
4. infrared spectroscopy sulfur hexafluoride gas detection module according to claim 1, which is characterized in that the detection sensing
Device (4) uses non-dispersive infrared detection sensor, the gas sensor driving device (7) being used cooperatively with detection sensor (4)
It is corresponding to use non-dispersive infrared detection sensor.
5. infrared spectroscopy sulfur hexafluoride gas detection module according to claim 1, which is characterized in that the infrared light supply
(3) luminescence chip built in, the infrared light supply (3) send according to frequency built in luminescence chip to sulfur hexafluoride detection gas chamber (2)
Detect infrared waves.
6. infrared spectroscopy sulfur hexafluoride gas detection module according to claim 1, which is characterized in that the data output
The operating voltage of interface (12) is 3V~5V, transmission rate 500Kbps.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920267266.0U CN209640214U (en) | 2019-03-01 | 2019-03-01 | Infrared spectroscopy sulfur hexafluoride gas detection module |
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| CN201920267266.0U CN209640214U (en) | 2019-03-01 | 2019-03-01 | Infrared spectroscopy sulfur hexafluoride gas detection module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2019
- 2019-03-01 CN CN201920267266.0U patent/CN209640214U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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