CN109085134A - A kind of gas leakage infrared radiation detection apparatus and its detection method - Google Patents
A kind of gas leakage infrared radiation detection apparatus and its detection method Download PDFInfo
- Publication number
- CN109085134A CN109085134A CN201811189386.XA CN201811189386A CN109085134A CN 109085134 A CN109085134 A CN 109085134A CN 201811189386 A CN201811189386 A CN 201811189386A CN 109085134 A CN109085134 A CN 109085134A
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- Prior art keywords
- infrared
- gas
- filter
- detection apparatus
- radiation detection
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Links
- 238000001514 detection method Methods 0.000 title claims abstract description 53
- 230000005855 radiation Effects 0.000 title claims abstract description 25
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 79
- 239000000523 sample Substances 0.000 claims description 13
- 239000004065 semiconductor Substances 0.000 claims description 13
- 239000003507 refrigerant Substances 0.000 claims description 12
- 239000004973 liquid crystal related substance Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 3
- FXRLMCRCYDHQFW-UHFFFAOYSA-N 2,3,3,3-tetrafluoropropene Chemical compound FC(=C)C(F)(F)F FXRLMCRCYDHQFW-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
Abstract
A kind of gas leakage infrared radiation detection apparatus and its detection method, display device (2), wiring board (3), feeler lever (4), infrared air chamber (5), aspiration pump (8), lithium battery (9), warning device (10) and its connection line, the display device, wiring board, feeler lever, infrared air chamber, aspiration pump, lithium battery, warning device including being successively set between light inlet window (1) and rear shell (6) pass through connection；External suspected leak area gas is pumped into infrared air chamber by aspiration pump by feeler lever, external suspected leak area gas is filtered by the infrared sensor being arranged in infrared air chamber, the single-chip computer control system on wiring board is reached, is shown by single-chip computer control system and is alarmed；The configuration of the present invention is simple can be convenient and efficiently find out gas leakage point, analyzed after gas collecting using software filtering, can reduce false alarm, and product is made to realize precise locating function.
Description
Technical field
The present invention relates to a kind of air-leakage detector, specifically a kind of gas leakage infrared radiation detection apparatus and its detection side
Method belongs to gas leak detection technology field.
Background technique
Portable gas leakage detection equipment used at present is usually to use thermal diode, negative corona discharge technology, this
A little technologies are there are a series of problems, for example, thermal diode sensor the problem of there is the service life is short and false alarm；Negative corona discharge
That there is stability is poor for technology, precision is not high, the service life is short, is unable to the problems such as quantitative detection gas leakage；
The reason of infrared technique has existed for many years, and Leakage inspection application is not used for for infrared technique is very
It is more；For example, infrared technique is too high as cost used in gas leakage detector, it is passed through in closed air chamber internal modulation light beam to be checked
Gas is surveyed, optical detector analysis detection phosgene body change information is then utilized；The bandwidth of infrared light is limited, such a specific
Wavelength is the analysis detection for promoting specific gas, analyzes and contains seldom refrigerant gas in gas, and light energy is absorbed seldom,
Receiver variable quantity is small, and sizable signal-to-noise ratio is maintained in the signal detected and in optical circuit energy loss in system
On；However the solution of these problems is problematic in that, wideband light source generates spectral emissions using filament, and filament needs too many
Time heat and cool down the high frequency modulated of frequency, therefore utilize chopper, but chopper consumption energy is larger, reduce
The reliability of instrument and increase complexity, if not utilizing mechanical chopper, by using the more sensitive receiver of effect or
Longer circuit, however the increased size of this scheme, cost and weight are not suitable for use on portable instrument.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of gas leakage infrared radiation detection apparatus and its detection method,
Structure is simple, can be convenient and efficiently finds out gas leakage point, is analyzed after gas collecting using software filtering, can reduce mistake
Alarm makes product realize precise locating function.
To achieve the goals above, a kind of gas provided by the invention leaks infrared radiation detection apparatus, including is successively set on
Display device, wiring board, feeler lever, infrared air chamber, aspiration pump, lithium battery, warning device and its company between optical window and rear shell
Link, the display device, wiring board, feeler lever, infrared air chamber, aspiration pump, lithium battery, warning device are connected by route
It connects；External suspected leak area gas is pumped into infrared air chamber by aspiration pump by feeler lever, by the infrared biography being arranged in infrared air chamber
Sensor carries out analysis to external suspected leak area gas and is converted into electric signal, reaches the single-chip microcontroller control system on wiring board
System, is shown by single-chip computer control system and is alarmed.
As a further improvement of the present invention, the infrared sensor includes that infrared transmitter, infrared filter, room are close
Bracket and infrared remote receiver are sealed, infrared transmitter emits infrared light, and infrared remote receiver receives filtered red by infrared filter
Outer light.
The feeler lever includes filter, air intake duct, and for connecting the connector of filter, air intake duct, filter is used to
The external suspected leak area gas for filtering sucking, particulate matter is separated with gas, air intake duct draws external suspected leak area gas
Enter in infrared air chamber or semiconductor gas room；Universal pipe is set in the lower part of air intake duct, the Universal pipe connects infrared air chamber, institute
It states Universal pipe and provides flexible channel for air intake duct, will conveniently stretch to infrared air chamber or semiconductor gas chamber, set on filter
Probe cover is set, the probe cover is used to protect filter, guarantees that filter will not fall off during use.
For detection gas concentration, the invention also includes semiconductors to detect gas chamber, the semiconductor detection gas chamber setting
Between the Universal pipe and rear shell of feeler lever, semiconductor transducer is set in semiconductor detection gas chamber.
As a further improvement of the present invention, the filter includes broadband filter and narrow band filter, wideband filtered
Wavelength between device transmitting is 8-10 microns, and predominantly detecting gas is HFC, HFO-1234yf；Narrow band filter limits (HFC) hydrogen
Change the infrared wavelength other than fluorocarbons refrigerant, for eliminating other gas interference signals.
As a further improvement of the present invention, the display device is segment code type LCD liquid crystal display screen or TFT liquid crystal
Product can be had record project information to show and shielding by display screen, segment code type LCD liquid crystal display screen or TFT liquid crystal display
On curtain.
As a further improvement of the present invention, the top of the feeler lever is provided with UV lamp, is added fluoroleum
Leakage point can be quickly and easily searched in system.
As a further improvement of the present invention, in order to protect whole device, rubber sheath is arranged in external in rear shell.
As a further improvement of the present invention, warning device is buzzer.
A kind of detection method of gas leakage infrared radiation detection apparatus, the specific steps are as follows:
Step 1: opening infrared radiation detection apparatus, it is evacuated pump work, external suspected leak area gas is infrared by feeler lever suction
In gas chamber；
Step 2: infrared transmitter issues infrared light, filters by infrared filter, let out by the suspection in infrared air chamber
Gas zone is leaked, is irradiated on infrared remote receiver；
Step 3: infrared remote receiver receives infrared light, is changed according to the variation of infrared light and export corresponding electric signal；
Step 4: the electric signal of infrared remote receiver is put by the bandpass filtering amplification module of operational amplifier with low-pass filtering
The two stage filter amplification of big module, generation can make single-chip computer control system acquire signal；
Step 5: variable quantity of the single-chip computer control system according to signal, judges the amount of leakage of sample gas refrigerant, then
It is shown by display screen or is reflected by the sound frequency of buzzer.
The present invention identifies the leakage of selected gas and its detection method of concentration using infrared principles；It is sent out from infrared transmitter
Infrared light out penetrates sample gas, and because infrared light is influenced by sample gas, the infrared light of respective wavelength generates variation, infrared
Result of variations is generated on receiver, by controlling optical filter, IR wavelength is controlled in a selected range, with true
The coverage area of all selected gases is protected, wavelength selected for refrigerant can be between 8-10 microns, by other waves
Long target signal filter, to reduce false alarm to greatest extent；This detection mode detects the corresponding time faster, and detection accuracy is more
It is high；In order to be further reduced false alarm, and ensure that transmitter is not contacted with gas, increase by a filter, filter can prevent 6
Two filters can be used for detection refrigerant in micron signal below；This detection mode can be used in interference gas
More, the increasingly complex place of environment filters out interference gas, reduces detection false alarm, quickly positions leakage point.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of infrared sensor in Fig. 1；
Fig. 3 is the structural schematic diagram of feeler lever；
Fig. 4 is the working principle of the invention schematic diagram.
In figure: 1, light inlet window, 2, display device, 3, wiring board, 4, feeler lever, 4.1, probe cover, 4.2, filter, 4.3, company
Connector, 4.4, air intake duct, 4.5, Universal pipe, 4.6, UV lamp, 5, infrared air chamber, 6, rear shell, 7, rubber sheath, 8, aspiration pump, 9,
Lithium battery, 10, buzzer, 11, infrared transmitter, 12, infrared filter, 13, room sealed support, 14, infrared remote receiver.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
As shown in Figure 1, a kind of gas of the present invention leaks infrared radiation detection apparatus, including be successively set on light inlet window 1 and rear shell 6 it
Between display device 2, wiring board 3, feeler lever 4, infrared air chamber 5, aspiration pump 8, lithium battery 9, warning device 10 and its connecting line
Road, the display device 2, wiring board 3, feeler lever 4, infrared air chamber 5, aspiration pump 8, lithium battery 9, warning device 10 pass through route
Connection；The display device be segment code type LCD liquid crystal display screen or TFT liquid crystal display, segment code type LCD liquid crystal display screen or
Product can be had record project information to be displayed on the screen by TFT liquid crystal display；The infrared air chamber 5 is one
Gold-plated infrared optics gas chamber is to make sucking gas sample can be with steady flow in infrared air chamber 5 for sucking gas sample
Dynamic, external suspected leak area gas is pumped into infrared air chamber 5 by aspiration pump 8 by feeler lever 4, red by being arranged in infrared air chamber 5
Outer sensor is filtered external suspected leak area gas, reaches the single-chip computer control system on wiring board 3, by single-chip microcontroller control
System processed is shown and is alarmed.
As shown in Fig. 2, infrared sensor includes infrared transmitter 11, infrared filter 12, room sealed support 13 and infrared
Receiver 14, infrared transmitter emit infrared light, and infrared remote receiver receives filtered infrared by infrared filter, filter
Light.
As shown in figure 3, the feeler lever 4 includes filter 4.2, air intake duct 4.4, for connecting filter 4.2, air intake duct
Universal pipe 4.5 is arranged in the lower part of air intake duct 4.4 in 4.4 connector 4.3, and the Universal pipe 4.5 connects infrared air chamber 5, in mistake
The upper setting probe cover 4.1 of filter 4.2.
It further include semiconductor detection gas chamber, the semiconductor detection gas chamber is arranged between feeler lever 4 and rear shell 6, half
Conductor, which detects, is arranged semiconductor transducer in gas chamber.
As a further improvement of the present invention, the filter includes broadband filter and narrow band filter, wideband filtered
Wavelength between device transmitting is 8-10 microns, and predominantly detecting gas is HFC, HFO-1234yf；Narrow band filter limits (HFC) hydrogen
Change the infrared wavelength other than fluorocarbons refrigerant, for eliminating other gas interference signals.
As a further improvement of the present invention, the top of the feeler lever 4 is provided with UV lamp 4.6, adds fluoroleum
System in can quickly and easily search leakage point.
As a further improvement of the present invention, in order to protect whole device, rubber sheath is arranged in external in rear shell.
As a further improvement of the present invention, warning device is buzzer.
As shown in figure 4, a kind of detection method of halogen gas leakage infrared radiation detection apparatus, the specific steps are as follows:
Step 1: open infrared radiation detection apparatus, aspiration pump 8 work, by external suspected leak area gas by feeler lever 4 be pumped into it is red
In outer gas chamber 5；
Step 2: infrared transmitter 11 issues infrared light, filtered by infrared filter 12, by infrared air chamber 5
Suspected leak gas zone is irradiated on infrared remote receiver 14；
Step 3: infrared remote receiver 14 receives infrared light, change the electric signal of output according to the variation of infrared light；
Step 4: the electric signal of infrared remote receiver 14 passes through the bandpass filtering amplification module and low-pass filtering of operational amplifier
The two stage filter of amplification module amplifies, and generates the analog signal that single-chip computer control system can be made to acquire；
Step 5: variable quantity of the single-chip computer control system according to signal, judges the amount of leakage of sample gas refrigerant, then
It is shown by display device 2 or is reflected by the sound frequency of warning device 10.
Embodiment
Before using the infrared radiation detection apparatus for the first time, therefore, to assure that lithium battery 9 has been filled with electricity, the charging time of lithium battery 9
About in 3 hours；Infrared radiation detection apparatus is opened, waits preheating and calibration process to complete, takes around 30 seconds；It can root when booting
According to the detection sensitivity for needing to be arranged infrared radiation detection apparatus；The position for being most likely to occur secondary refrigerant leakage is found, the main points of consideration include:
The changed point of welding point, cross section, the changed point in these pipeline directions in refrigerant pipeline, then visually entire system
Cooling system (all pipelines, hose, connector, pipe fitting, maintenance valve etc.) finds the sign of leakage of lubricant, damage and corrosion, makees
For the index of possible leak point；Aspiration pump 8 works, by external suspected leak area gas by the air intake duct 4.4, universal of feeler lever 4
Pipe 4.5 is pumped into infrared air chamber 5；Infrared transmitter 11 issues infrared light, filters by infrared filter 12, passes through infrared gas
Suspected leak gas zone in room 5, is irradiated on infrared remote receiver 14；Infrared remote receiver 14 receives infrared light, according to infrared light
Variation change output electric signal；The electric signal of infrared remote receiver 14 by the bandpass filtering amplification module of operational amplifier with
The two stage filter of low-pass filtering amplification module amplifies, and generates the analog signal that single-chip computer control system can be made to acquire；Single-chip microcontroller
Control system judges the amount of leakage of sample gas refrigerant according to the variable quantity of signal, then shown by display device 2 or
It is reflected by the sound frequency of warning device 10.
Entire refrigeration system is tested according to the continuous path in refrigeration system, to ensure to be completely covered, if it find that leakage,
Continue the rest part of test refrigeration system；It is last as needed, it is retested under muting sensitivity setting, retests and taken
The maintenance valve of hd.
Claims (10)
1. a kind of gas leaks infrared radiation detection apparatus, which is characterized in that including being successively set between light inlet window (1) and rear shell (6)
Display device (2), wiring board (3), feeler lever (4), infrared air chamber (5), aspiration pump (8), lithium battery (9), warning device (10)
And its connection line, the display device (2), wiring board (3), feeler lever (4), infrared air chamber (5), aspiration pump (8), lithium electricity
Pond (9), warning device (10) pass through connection；External suspected leak area gas is pumped into red by aspiration pump (8) by feeler lever (4)
In outer gas chamber (5), analysis is carried out to external suspected leak area gas as the infrared sensor built in infrared air chamber (5) and is converted into electricity
Signal reaches the single-chip computer control system on wiring board (3), is shown by single-chip computer control system and alarmed.
2. a kind of gas according to claim 1 leaks infrared radiation detection apparatus, which is characterized in that the infrared sensor packet
Include infrared transmitter (11), infrared filter (12), room sealed support (13) and infrared remote receiver (14), infrared transmitter transmitting
Infrared light, infrared remote receiver are received by the filtered infrared light of infrared filter.
3. a kind of gas according to claim 1 or 2 leaks infrared radiation detection apparatus, which is characterized in that feeler lever (4) packet
Filter (4.2), air intake duct (4.4) are included, for connecting the connector (4.3) of filter (4.2), air intake duct (4.4), in air-breathing
Universal pipe (4.5) are arranged in the lower part for managing (4.4), and the Universal pipe (4.5) connects infrared air chamber (5), in the upper of filter (4.2)
It is arranged probe cover (4.1).
4. a kind of gas according to claim 3 leaks infrared radiation detection apparatus, which is characterized in that further include semiconductor detection gas
Room, the semiconductor detection gas chamber are arranged between Universal pipe (4.5) and rear shell (6), are arranged in semiconductor detection gas chamber
Semiconductor transducer.
5. a kind of gas according to claim 3 leaks infrared radiation detection apparatus, which is characterized in that filter (4.2) packet
Broadband filter and narrow band filter are included, the wavelength between broadband filter transmitting is 8-10 microns, and narrow band filter limits hydrogen
Change the infrared wavelength other than fluorocarbons refrigerant.
6. a kind of gas according to claim 5 leaks infrared radiation detection apparatus, which is characterized in that the display device (2)
For segment code type LCD liquid crystal display screen or TFT liquid crystal display.
7. a kind of gas according to claim 6 leaks infrared radiation detection apparatus, which is characterized in that on the top of the feeler lever (4)
End is provided with UV lamp (4.6).
8. a kind of gas according to claim 7 leaks infrared radiation detection apparatus, which is characterized in that set in the outside of rear shell (6)
Set rubber sheath (7).
9. a kind of gas according to claim 8 leaks infrared radiation detection apparatus, which is characterized in that the warning device (10)
For buzzer.
10. a kind of detection method of gas leakage infrared radiation detection apparatus according to claim 1 or 2 or 3, which is characterized in that
Specific step is as follows:
Step 1: opening infrared radiation detection apparatus, aspiration pump (8) work is red by feeler lever (4) suction by external suspected leak area gas
In outer gas chamber (5)；
Step 2: infrared transmitter issues infrared light, filtered by infrared filter, filter, by infrared air chamber (5)
Suspected leak gas zone, is irradiated on infrared remote receiver；
Step 3: infrared remote receiver (14) receives infrared light, change the electric signal of output according to the variation of infrared light；
Step 4: the electric signal of infrared remote receiver (14) is put by the bandpass filtering amplification module of operational amplifier with low-pass filtering
The two stage filter amplification of big module, generates the analog signal that single-chip computer control system can be made to acquire；
Step 5: variable quantity of the single-chip computer control system according to signal, judges the amount of leakage of sample gas refrigerant, then passes through
Display device (2) shows or is reflected by the sound frequency of warning device (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811189386.XA CN109085134A (en) | 2018-10-12 | 2018-10-12 | A kind of gas leakage infrared radiation detection apparatus and its detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811189386.XA CN109085134A (en) | 2018-10-12 | 2018-10-12 | A kind of gas leakage infrared radiation detection apparatus and its detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109085134A true CN109085134A (en) | 2018-12-25 |
Family
ID=64843597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811189386.XA Pending CN109085134A (en) | 2018-10-12 | 2018-10-12 | A kind of gas leakage infrared radiation detection apparatus and its detection method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109085134A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109816948A (en) * | 2019-04-04 | 2019-05-28 | 烟台海泰卫生除害科技服务有限公司 | A kind of intelligent alarm equipment |
| CN111878700A (en) * | 2020-08-06 | 2020-11-03 | 上海捷氢科技有限公司 | Hydrogen fuel cell automobile and hydrogenation communication device thereof |
| CN113008468A (en) * | 2021-03-03 | 2021-06-22 | 浙江世鼎橡胶工业有限公司 | Rubber diaphragm leakproofness detection device |
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| CN102445433A (en) * | 2011-12-26 | 2012-05-09 | 南京顺泰科技有限公司 | SF6 decomposition gas infrared spectrum multi-component detection method and device |
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| CN113008468B (en) * | 2021-03-03 | 2023-10-13 | 浙江世鼎橡胶工业有限公司 | Rubber diaphragm tightness detection device |
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Application publication date: 20181225 |