CN109839363A - Multiple-gas detector - Google Patents
Multiple-gas detector Download PDFInfo
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- CN109839363A CN109839363A CN201910216056.3A CN201910216056A CN109839363A CN 109839363 A CN109839363 A CN 109839363A CN 201910216056 A CN201910216056 A CN 201910216056A CN 109839363 A CN109839363 A CN 109839363A
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- optical filter
- gas
- light
- gas detector
- receiving member
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Abstract
The invention discloses one kind of multiple gas detecting instruments, it include: optical filter disk, the even numbered blocks optical filter of equidistantly distributed is provided on the optical filter disk, two pieces of adjacent optical filters are an optical filter pair in the optical filter, each optical filter is to being respectively used to detect different gas molecules, each optical filter corresponds to the characteristic absorption peak of gas molecule to be detected to including: one first optical filter；It is corresponding not by the wave band of the gas molecules sorb to be detected with one second optical filter.The present invention has the advantages that multiple-gas detector is made of single broad spectrum light source and single corresponding detector, single detector can more make system handle model close to ideal differential signal, be conducive to the raising of detection accuracy.Especially suitable for occasion that is high to detection accuracy and needing to detect multiple gases concentration.
Description
Technical field
It is particularly a kind of non-the present invention relates to sensor technical field more particularly to one kind of multiple gas detecting instruments
It is divided infrared multiple-gas detector.
Background technique
Gas detecting instrument is a kind of instrument and meter tool of gas leakage Concentration Testing, is primarily referred to as portable/handheld
Gas detecting instrument.Gaseous species present in environment are mainly detected using gas sensor, gas sensor is for detecting
The composition of gas and the sensor of content.It is generally believed that the definition of gas sensor be to detect target as basis of classification,
That is all sensors for detection gas composition and concentration are referred to gas sensor, regardless of it is to use physical method,
Still chemically.
There are multi-party planar defects for traditional gas detecting instrument, first, using one based on the gas detecting instrument in Chemistry College
Occur intoxication conditions after fixing time, causes sensor life-time short；Second, the gas detecting instrument based on incandescent lamp or other light sources is then
There are power consumption height, service life shortage point, are unfavorable for hand-held use；Third, traditional gas detector can only detect pure gas,
It is needed when needing to detect multiple gases using multiple instruments, it is more wasteful and cumbersome.
Gas sensor based on non-phenolic oxidative coupling reaction has the characteristics that safety itself, high-precision and long-life.Its
Working principle is: the gas for diffusing into gas chamber can absorb the light of light source sending, and gas concentration and the relationship for absorbing light energy take
From langbobier law, therefore the attenuation of the energy for the light that can be detected from detector determines the number of gas concentration.
Since different gas molecules has different characteristics absorption peak, the wave-length coverage for having selection to make panel detector structure different is come
It determines and detects any gas.In addition, multiple-gas detector can reduce cost compared to pure gas detector.
Summary of the invention
In view of this, technical problem to be solved by the invention is to provide a kind of for a variety of harmful hazardous gases detections
Multiple-gas detector, improving the detector service life, improving precision and reducing cost；
Another of the invention is further objective is that will record the data detected, and be more than certain in detected value
Alarm is triggered when one value, in order to consult and prompted.
To achieve the goals above, the present invention provides one kind of multiple gas detecting instruments, comprising:
Optical filter disk, is provided with the even numbered blocks optical filter of equidistantly distributed on the optical filter disk, adjacent in the optical filter
Two pieces of optical filters are an optical filter pair, and each optical filter is to being respectively used to detect different gas molecules, each optical filter pair
Include:
One first optical filter, the characteristic absorption peak of corresponding gas molecule to be detected；
It is corresponding not by the wave band of gas molecules sorb to be detected with one second optical filter.
Wherein, each optical filter has different bandwidth.
Further, the multiple-gas detector further include:
Pedestal；
Light emitting members are set on pedestal, the light source including emitting light；
Further, which is infrared light supply, and the emission spectrum range of the infrared light supply covers all optical filter windows；
Light-receiving member is built-in with detector, realizes Signal Regulation and digital read out to the optical signal received, setting
In on pedestal；
Concentration structure, built-in reflector realize the focusing for the light beam that light source issues, are set to light emitting members and light-receiving
Between component；
Above-mentioned optical filter disk, is set between concentration structure and light-receiving member, each optical filter on the optical filter disk
The analysis realized to the light beam from concentration structure is handled, the beam information of analysis processing is transferred to the light-receiving member
Detector；
Micromotor, fixed optical filter disk simultaneously control its rotation, are set on pedestal.
Wherein, light emitting members, concentration structure, in the detector in optical filter and light-receiving member on optical filter disk
The heart is on the same line.
Further, wherein
In light emitting members further include:
Drive circuit board controls above-mentioned light source luminescent；
Reflector is set on above-mentioned light source, realizes the focusing of light；
And temperature sensor, realize temperature-compensating.
Further include temperature sensor in light-receiving member, realizes same temperature-compensating.
Multiple-gas detector, further includes:
Warning device is set on pedestal, realizes alarm response when detected gas reaches warning value.
The multiple-gas detector further includes shell, is also equipped on the shell:
Liquid crystal display realizes the display of the real-time concentration of gas to be detected；
And/or venthole and aqueous vapor filter screen, guarantee the drying in each optical filter use process；
And/or power supply；
And/or switch button；
And/or alarm cancel button, control the normal work of gas detecting instrument.
Wherein, power supply can be dry cell or other any type of power supplies.
The present invention has the advantages that
(1) multiple-gas detector can simultaneously examine the concentration of multiple gases because having multiple optical filters pair
It surveys, to realize single equipment while detect the concentration of multiple gases.Especially suitable for need to measure multiple gases concentration and
To the demanding occasion of measurement accuracy；
(2) in a preferred approach, since multiple-gas detector of the invention has record data set and warning device
And data download interface, the data detected can be handled, and generate data and curves, to being more than the upper limit or offline
Numerical value is alarmed, in order to which the acquisition of data, processing and subsequent use are analyzed.
Detailed description of the invention
Fig. 1 is the internal structure schematic layout pattern of multiple-gas detector in the embodiment of the present invention；
Fig. 2 is the optical filter disk schematic diagram of multiple-gas detector in the embodiment of the present invention；
Fig. 3 is the light emitting members structural schematic diagram of multiple-gas detector in the embodiment of the present invention；
Fig. 4 is the concentration structure schematic diagram of multiple-gas detector in the embodiment of the present invention；
Fig. 5 is the light-receiving structural schematic diagram of multiple-gas detector in the embodiment of the present invention；
Fig. 6 is the micromotor mounting structure schematic diagram of multiple-gas detector in the embodiment of the present invention；
Fig. 7 is the monnolithic case schematic diagram of multiple-gas detector in the embodiment of the present invention.
In figure:
11 concentration structure of light emitting members, 12 optical filter disk 19
14 dry cell of light-receiving member, 16 warning device 17
18 connecting hole of pedestal, 20 circuit board mounting hole 21
Temperature sensor 22,31 light source, 23 reflector 24,26
27 detector of optical filter, 29 metal block fixed frame 25,28,30
32 micromotor fixed structure 33 of micromotor
40 venthole of shell, 41 power on button 42
Alarm 43 liquid crystal display of cancel button, 44 Mist filtration net 45
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in further detail.
Comparative diagram 1-7, illustrates embodiments of the present invention by way of example.
One embodiment of the invention provides one kind of multiple gas detecting instruments, comprising:
Optical filter disk 19 is provided with the even numbered blocks optical filter 27 of equidistantly distributed, the optical filter 27 on the optical filter disk 19
In adjacent two pieces of optical filters be an optical filter pair, each optical filter is to being respectively used to detect different gas molecules, each
Optical filter is to including:
One first optical filter, the characteristic absorption peak of corresponding gas molecule to be detected；
It is corresponding not by the wave band of gas molecules sorb to be detected with one second optical filter.
Wherein, each optical filter 27 has different bandwidth.
In the present embodiment, the narrow band filter 27 being mounted on optical filter disk 19 plays the role of screening wavelength, optical filter
There is even numbered blocks optical filter 27 on disk 19, adjacent two pieces of formation is a pair of, as an optical filter pair.In any pair of optical filter, one
27 window of block optical filter corresponds to the characteristic absorption peak of gas molecule, and another piece of 27 window of optical filter is corresponding not by gas molecules sorb
Wave band, due to only one detector, two signals needs are successively detected in time, and the process is by accurately controlling
Rotating filtering piece 27 is realized.As shown in Figure 2, three pairs of optical filters 27 are furnished on optical filter disk 19 altogether, therefore can detecte suction
Receive three kinds of close gases of peak.
In some embodiments, Fig. 1 is please referred to, the multiple-gas detector further include:
Pedestal 18；
Light emitting members 11 are set on pedestal 18, the light source 23 including emitting light；
Further, which is infrared light supply, and the emission spectrum range of the infrared light supply covers all optical filtering gates
Mouthful；
Light-receiving member 14 is built-in with single detector 29, realizes Signal Regulation and number to the optical signal received
It reads, is set on pedestal 18；
Concentration structure 12, built-in reflector 26 realize the focusing for the light beam that light source 23 issues, are set to light emitting members 11
Between light-receiving member 14；
Above-mentioned optical filter disk 19, is set between concentration structure 12 and light-receiving member 14, each on the optical filter disk 19
A optical filter handles the analysis realized to the light beam from concentration structure 12, and the beam information of analysis processing is transferred to the light
The detector 29 of receiving part；
Micromotor 32, fixed optical filter disk simultaneously control its rotation, are set to bottom by a micromotor fixed structure 33
On seat 18.
Wherein, light emitting members 11, concentration structure 12, the optical filter on optical filter disk 19 and the spy in light-receiving member 14
Survey the center of device 29 on the same line.
In some embodiments, referring to figure 3., in light emitting members 11 further include:
Drive circuit board controls above-mentioned light source luminescent；
Reflector 24 is set on above-mentioned light source 23, the convergence that the light that light source 23 issues passes through the realization light of reflector 24；
With temperature sensor 22, temperature-compensating is realized.
Further include temperature sensor 31 in light-receiving member 14 referring to figure 5. in some embodiments, realizes same temperature
Degree compensation.
In the present embodiment, when multiple-gas detector works, particular beam, the spy are issued by light emitting members 11 first
Determine light beam to be sent on optical filter disk 19 through concentration structure 12, when detector works, control of the optical filter disk 19 in micromotor 32
System is lower to be rotated in certain speed, and each optical filter 27 on optical filter disk 19 carries out optical filtering processing to received light beam, passes through
Treated, and beam signal is further transmitted to detector 29, and detector 29 can generate after receiving optical signal is proportional to light letter
Number strong and weak signal voltage, thus the decrease for being actually taken up by gas rear light intensity can be fine be reacted to the corresponding voltage of detector
On；Meanwhile as the optical filter of reference 27 through the light not being actually taken up by gas, the voltage that detector 29 responds is not with gas concentration
Variation.Two paths of signals is done into difference processing, can effectively inhibit common-mode noise and multiplicative noise.Further, since only using
One detector 29, difference can completely eliminate in the past using bring extra error when two detectors.
In some embodiments, the multiple-gas detector, further includes:
Warning device 17 is set on pedestal 18, realizes alarm response when detected gas reaches warning value.
In other embodiments, which further includes shell 40, is also equipped on the shell 40:
Liquid crystal display 44 realizes the display of the real-time concentration of gas to be detected；
And/or venthole 41 and aqueous vapor filter screen 45, guarantee the drying in each 27 use process of optical filter；
And/or power supply 16；
And/or switch button 42
And/or alarm cancel button 43, control the normal work of gas detecting instrument.
Wherein, power supply 16 can be dry cell or other any type of power supplies.
In the present embodiment, in order to let the user know that the real-time concentration of gas, shell 40 are equipped with liquid crystal display 44；For
User is informed in time when gas concentration is more than warning value, and inside is also equipped with warning device 17；Specifically by control circuit control
Whether system generates alarm；It can be cancelled by alarm release button 43 and be alarmed.
In use, since droplet cannot be condensed in device on optical filter 27, it is therefore desirable to whether check aqueous vapor filter membrane 45
It posts；The installation site of multiple-gas detector needs to be determined according to the density size of tested gas；For lighter-than-air
The multiple-gas detector of the embodiment of the present invention is generally placed in about 30 centimeters of gas water leakage plane or more by gas；For
The multiple-gas detector of the embodiment of the present invention is generally placed in about 30 centimeters of leakage point or less by heavier-than-air gas；With
The comparable gas of atmospheric density is placed in the position away from about 1.5 meters of ground vertical range.
So far, although those skilled in the art will appreciate that the specific reality that present invention has been shown and described in detail herein
Mode is applied, still, without departing from the spirit and scope of the present invention, can still be directly determined according to the present disclosure
Or derive many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the invention should be understood and defined as
Cover all such other variations or modifications.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in protection of the invention
Within the scope of.
Claims (10)
1. one kind of multiple gas detecting instruments characterized by comprising
Optical filter disk, is provided with the even numbered blocks optical filter of equidistantly distributed on the optical filter disk, adjacent in the optical filter
Two pieces of optical filters are an optical filter pair, and each optical filter is to being respectively used to detect different gas molecules, each optical filter
To including:
One first optical filter, the characteristic absorption peak of corresponding gas molecule to be detected；
It is corresponding not by the wave band of the gas molecules sorb to be detected with one second optical filter.
2. multiple-gas detector according to claim 1, which is characterized in that each optical filter has different bands
It is wide.
3. multiple-gas detector according to claim 2, which is characterized in that further include:
Pedestal；
Light emitting members are set on the pedestal, the light source including emitting light；
Light-receiving member is built-in with detector, realizes to the Signal Regulation and digital read out of the optical signal received, is set to institute
It states on pedestal；
Concentration structure, built-in reflector realize the focusing for the light beam that the light source issues, are set to the light emitting members and institute
It states between light-receiving member；
The optical filter disk, is set between the concentration structure and the light-receiving member, each on the optical filter disk
Optical filter handles the analysis realized to the light beam from the concentration structure, and the beam information of the analysis processing is transferred to institute
State the detector of light-receiving member；
Micromotor, the fixed optical filter disk simultaneously control its rotation, are set on the pedestal.
4. multiple-gas detector according to claim 3, which is characterized in that the light emitting members, concentration structure, filter
The center of the optical filter on mating plate disk and the detector in light-receiving member is on the same line.
5. multiple-gas detector according to claim 3, which is characterized in that the light source is infrared light supply, described red
The emission spectrum range of outer light source covers all optical filter windows.
6. multiple-gas detector according to claim 3, which is characterized in that in the light emitting members further include:
Drive circuit board controls the light source luminescent；
Reflector is set on the light source, realizes the focusing of light；
And temperature sensor, realize temperature-compensating.
7. multiple-gas detector according to claim 3, which is characterized in that further include temperature in the light-receiving member
Sensor realizes temperature-compensating.
8. according to claim 1 to any multiple-gas detector in 7, which is characterized in that further include:
Warning device is set on the pedestal, realizes alarm response when detected gas reaches warning value.
9. multiple-gas detector according to claim 3, which is characterized in that further include shell, installed on the shell
Have:
Liquid crystal display realizes the display of the real-time concentration of gas to be detected；
And/or venthole and aqueous vapor filter screen, guarantee the drying in each optical filter use process；
And/or power supply；
And/or switch button；
And/or alarm cancel button, control the normal work of gas detecting instrument.
10. multiple-gas detector according to claim 9, which is characterized in that the power supply is dry cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216056.3A CN109839363A (en) | 2019-03-20 | 2019-03-20 | Multiple-gas detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216056.3A CN109839363A (en) | 2019-03-20 | 2019-03-20 | Multiple-gas detector |
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| CN109839363A true CN109839363A (en) | 2019-06-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112748084A (en) * | 2021-01-04 | 2021-05-04 | 安徽中科华仪科技有限公司 | Remote sensing detection method for motor vehicle exhaust based on infrared combined laser |
| CN112748083A (en) * | 2021-01-04 | 2021-05-04 | 安徽中科华仪科技有限公司 | Optical system for remote sensing detection of motor vehicle exhaust |
| CN112924399A (en) * | 2019-12-05 | 2021-06-08 | 比亚迪半导体股份有限公司 | Gas concentration detection device and detection method |
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Application publication date: 20190604 |