CN202256147U - Quick detection intelligent infrared gas sensor - Google Patents
Quick detection intelligent infrared gas sensor Download PDFInfo
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- CN202256147U CN202256147U CN 201120358836 CN201120358836U CN202256147U CN 202256147 U CN202256147 U CN 202256147U CN 201120358836 CN201120358836 CN 201120358836 CN 201120358836 U CN201120358836 U CN 201120358836U CN 202256147 U CN202256147 U CN 202256147U
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Abstract
The utility model relates to a quick detection intelligent infrared gas sensor, which comprises a gas absorption cavity, apyroelectric detectors and a mesh enclosure; the gas absorption cavity consists of a semispherical first gas absorption chamber and a shallow concave spherical second gas absorption chamber, the top surface and the side wall of the gas absorption cavity are respectively provided with a ventilation hole which is intersected on the inner wall of the cavity, at least one infrared light source and two orthogonal or nonorthogonal pyroelectric detectors are arranged inside the gas absorption cavity, each pyroelectric detector is provided with two narrow ports with a filter plate, one port is a reference end, and the other port is a detection end. The gas absorption cavity is an opened-type butterfly-shaped gas chamber, so the utilization rate of an optical energy of the cavity and the signal-to-noise ratio of an optical signal can be increased, the measurement drifting phenomenon caused by the factors such as environmental interference and nonuniform light intensity can be eliminated, the real concentration of the gas to be detected can be predicted, the real-measured gas concentration can be effectively corrected through weighted summation algorithm, the gas detection sensitivity and the quick detection responding time can be improved, and the detection precision and the detection stability of the sensor can be improved.
Description
Technical field
The utility model relates to a kind of gas sensor, especially a kind of a kind of infrared gas sensor that comprises gas absorption chamber, infrared light supply, pyroelectricity probe and signals collecting control panel.
Background technology
At coal mine underground monitoring gas (CH
4) concentration be the prevention Gas Explosion Accidents in Coal Mines important means, detect CH at present
4Instrument mainly contain, catalytic combustion-type, infrared light spectral pattern, semiconductor air-sensitive type, gas chromatography type and optical fiber measurement type etc. wherein use catalytic combustion method gas sensor the most generally.But this sensor exists drawbacks such as being prone to affected by environment, reliability and poor accuracy, serviceable life is short, maintenance cost is high, easy generation catalysis poisoning, belongs to backward obsolete product.And be one of present research focus based on the infrared light spectral pattern sensor of NDIR technology; It has avoided the drawback of existing catalytic combustion type sensor from principle; Has precision and highly sensitive; Reliability and selectivity are good, do not poison, rely on oxygen, receive that the environmental disturbances factor is less, long service life and do not need remarkable advantage such as frequent adjustment, can realize analyzing continuously and function such as intelligence detection in real time.
Existing infrared gas sensor; It absorbs air chamber and adopts unidirectional air hole mode in top and optical focusing system mostly; When carrying out gas detection; Chamber is subject to gas to be measured and comes to disturbing or because of factors such as light intensity is inhomogeneous cause phenomenons such as measuring drift, promptly when gas to be measured by the different directions diffusion or because of the light path adjustment is inaccurate, it is all undesirable that sonde response time and accuracy of detection and stable shows.For this reason, people seek a kind of solution stable more, that more rationally be suitable for always in the contradiction of gas detection stability, sensitivity and accuracy of detection.
The utility model content
The technical matters that the utility model will solve is under the prerequisite that does not improve manufacturing cost; Through the absorbing cavity air chamber structure and mutually it answers Component Design; Improve the signal to noise ratio (S/N ratio) of the efficiency of light energy utilization and light signal, eliminate and measure drift hidden danger, detect response fast thereby reach; Improve accuracy of detection and stability, and then a kind of fast detecting intelligence infrared gas sensor is provided.
Based on the problems referred to above and purpose, the technical measures that the utility model is taked are design proposals of a kind of fast detecting intelligence infrared gas sensor, comprise air absorbing cavity, pyroelectricity probe and guard.
Said air absorbing cavity is to comprise first gas absorption chamber and second gas absorption chamber; Said first gas absorption chamber is that its all sidewall is provided with 12 sidewall air holes, and corresponding, and said end face is provided with 12 end face air holes, and the two quadrature and coincide with the inner wall surface of air absorbing cavity; The outside cylinder of its first gas absorption chamber is the first outside cylinder ladder table top and the second outside cylinder ladder table top.
It is indoor that said pyroelectricity probe is arranged on second gas absorption; When being provided with two pyroelectricity probes; Two pyroelectricities orthogonal thereto type 90o that pops one's head in is provided with, or is nonopiate type 120o and is provided with, and each pyroelectricity probe is provided with two narrow band pass filter ports; One is reference edge, and another is an end of probe.
Said guard is to comprise first guard and second guard, and said first guard is the upper surface that is arranged at first gas absorption chamber; Said second guard is to be arranged in the annular groove of first gas absorption chamber.
In above-mentioned design proposal, said first gas absorption chamber is to be the dome-type structure; Said second gas absorption chamber is to be the scrobicula spherical structure; Said first gas absorption chamber and the second gas absorption chamber both ends of the surface circumferential abutment place are convex-concave centering location and make structure up; The axis of symmetry of said pyroelectricity probe is provided with infrared light supply, and about the central point setting.
The utility model is through the structure and the associated components design of absorbing cavity air chamber; The open butterfly absorbing cavity air chamber structure that promptly adopts top dome-type and bottom scrobicula sphere to form; Make light in the chamber, be tending towards even through repeatedly reflecting the back light intensity; Photo-sensitive cell on the detecting head does not receive the influence of light path skew, need not focusing and can receive sample gas.The unique design of associated components air hole effectively improves the chamber efficiency of light energy utilization, makes the signal to noise ratio (S/N ratio) of light signal be improved; Simultaneously owing to adopt open butterfly air chamber structure, for gas to be measured laterally or longitudinal diffusion all can effectively receive, can eliminate gas to be measured and come to the measurement drift phenomenon that factor such as disturbs and light intensity is inhomogeneous to cause; And the two detecting head four-way structures of orthogonal type or nonopiate type are provided with; Can predict gas actual concentration to be measured; Can effectively revise the actual measurement gas concentration through the weighted accumulation algorithm; This measure has improved the sensitivity and the fast detecting response time of gas detection, has improved the accuracy of detection and detection stability of sensor.
Description of drawings
Fig. 1 is the utility model sensor probe sectional structure synoptic diagram;
Fig. 2 is the utility model air absorbing cavity first gas absorption chamber contour structures synoptic diagram;
Fig. 3 is the utility model air absorbing cavity first gas absorption chamber plan structure synoptic diagram;
Fig. 4 faces structural representation for the utility model air absorbing cavity first gas absorption chamber;
Fig. 5 is the utility model air absorbing cavity first gas absorption chamber sectional structure synoptic diagram;
Fig. 6 is the utility model air absorbing cavity second gas absorption chamber plan structure synoptic diagram;
Fig. 7 is the utility model air absorbing cavity second gas absorption chamber left side TV structure synoptic diagram;
Fig. 8 is the intelligent infrared gas sensor probe explosive view of the utility model.
Among the figure: 1: annular groove; 2: shell; 3: the first guards; 4: air absorbing cavity; 5: the sidewall air hole; 6: the first gas absorption chambers; 7: the second guards; 8: the signals collecting control panel; 9: infrared light supply; 10: the pin contact pin; 11: the second gas absorption chambers; 12: base plate; 13: the pyroelectricity probe; 14: the first outside cylinder ladder table tops; 15: the second outside cylinder ladder table tops; 16: the first gas absorption chamber boss face; 17: the second gas absorption chamber concave station faces; 18: the end face air hole; 19: the scrobicula spherical reflector.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is made further detailed description.
As shown in Figure 1, implement the utility model and comprise first gas absorption chamber 6, second gas absorption chamber 11, infrared light supply 9, pyroelectricity detecting head 13, first guard 3, second guard 7, signals collecting control panel 8, base plate 12, shell 2 and pin contact pin 10; Wherein, air absorbing cavity 4 is to be made up of first gas absorption chamber 6 and second gas absorption chamber 11.It is corresponding with second gas absorption chamber, 11 scrobicula spherical reflectors 19 that first gas absorption chamber 6 is the semisphere reflecting surface.
As shown in Figure 8, be open butterfly chamber intelligence infrared gas sensor probe explosive view, guard 3 is placed on the top of first absorption chamber 6 and places the upper end of shell 2, and second guard 7 is installed in the annular groove 1 of first gas absorption chamber 6; The first gas absorption chamber boss face 16 is made up in being connected the end with the second gas absorption chamber concave station face, 17 centerings location; Make that air absorbing cavity 4 inside surfaces are a complete seamless chamber that makes up.Infrared light supply 9 is connected on the signals collecting control panel 8 with pyroelectricity detecting head 13; And said signals collecting control panel 8 is fixed in the bottom of second gas absorption chamber 11 and guarantee that the sensor port of its light source head and pyroelectricity detecting head 13 is presented in the air absorbing cavity 4; Simultaneously, pin contact pin 10 is connected signals collecting control panel 8 bottoms, and base plate 12 is with shell 2 whole enclosed package.
As shown in Figure 2; Outside drawing for first gas absorption chamber 6 of described open butterfly air absorbing cavity 4; Described first gas absorption chamber 6 is the dome-type symmetrical structure; Can effectively improve light reflection and aggregate capabilities, light light intensity after repeatedly reflecting is tending towards uniformity, eliminates and measures drift hidden danger; Said its chamber inner wall surface gold-plating has the characteristic that is difficult for burn into nondiscolouring and high reflecting rate, can improve the gas absorption rate.
Like Fig. 3, shown in 4; The excircle sidewall of said its first gas absorption chamber 6 is provided with plural at least sidewall air hole 5; And corresponding, said end face is provided with 12 end face air holes 18, and two sides air hole quadrature and coincide with the inner wall surface of air absorbing cavity 4; So structure forms 360
0Omnibearing open butterfly chamber for no matter gaseous diffusion horizontal or that vertically come all can effectively be accepted, can improve probe fast detecting and response time; The sidewall air hole 5 that quadrature overlaps is provided with and makes chamber interior not answer light leak, and the efficiency of light energy utilization effectively improves, and the signal to noise ratio (S/N ratio) of light signal also is improved simultaneously.
As shown in Figure 4; The excircle sidewall of said first gas absorption chamber 6 is the stepped table top of cylinder; The said first outside cylinder ladder table top 14 is positioned at first gas absorption chamber, 6 excircle sidewall tops, and it act as with shell 2 inwalls and cooperates to confirm the concentric circumference position of first gas absorption chamber 6; The described second outside cylinder ladder table top 15 forms the banded gas exchange space of an annulus with shell 2 inwalls, makes gas to be measured to get into thus in the air absorbing cavity 4.
Correspondingly, as shown in Figure 5, said first gas absorption chamber, 6 end faces are provided with first guard 3 and get into chamber in order to stop the material beyond the gas molecule.Correspondingly, the described first gas absorption chamber boss face 16, its function are to cooperate with the second gas absorption chamber concave station face, 17 upper end to constitute the centering location, make seamless chamber up with formation, and the convex-concave table top circumference of setting produces zigzag and makes band up.
Correspondingly, described first gas absorption chamber, 6 lower step table tops are provided with annular groove 1, and its function gets into chamber for placing guard 7 to stop the material beyond the gas molecule, guarantees the cleaning of gas absorption chamber.
Like Fig. 6, shown in 7; For second gas absorption chamber, 11 inner plenum of described air absorbing cavity 4 are the scrobicula spherical structure; Its function efficiently reflexes on the hemisphere face catoptron of first gas absorption chamber 6 for the light that infrared light supply 9 is sent; Said its chamber inner wall surface gold-plating has the characteristic that is difficult for burn into nondiscolouring and high reflecting rate, can improve the gas absorption rate.
Be provided with 12 pyroelectricity probes 13 and at least more than one infrared light supply 9 in said second gas absorption chamber 11, and be fixedly connected on the signals collecting control panel 8.
Be provided with pyroelectricity probe 13 in said second gas absorption chamber 11, popped one's head in 13 o'clock being provided with two pyroelectricities, two pyroelectricities, the 13 orthogonal thereto type 90o that pop one's head in are provided with, or are nonopiate type 120o and are provided with; Described each pyroelectricity probe 13 is provided with two narrow band pass filter ports, and one is reference edge, and another is an end of probe.
2 pyroelectricities in said second gas absorption chamber 11 pop one's head in 13 orthogonal thereto type 90o or the settings of the two probe of nonopiate type 120o four-way structure; Its function is for can predict gas actual concentration to be measured; Can effectively revise the actual measurement gas concentration through the weighted accumulation algorithm; This measure has improved the sensitivity and the fast detecting response time of gas detection, has improved the accuracy of detection and detection stability of sensor thus.
As shown in Figure 6; Described second gas absorption chamber 11 is scrobicula sphere segment; The setting of this scrobicula spherical reflector 19 can efficiently reflex to the light that light source sends on the hemisphere face catoptron of first gas absorption chamber 6; Then again through the hemisphere face mirror reflects to the scrobicula spherical reflector 19 of second gas absorption chamber 11, refraction number of times few light will leak discharge chamber, so form repeatedly reflect after; Light intensity is tending towards evenly, converges at last on the sensitization receptacle of pyroelectricity probe 13 and is converted into electric signal.
Described infrared light supply 9 is positioned at open butterfly air absorbing cavity 4 bottoms with pyroelectricity probe 13; It is fixedly connected on signals collecting control panel 8 upper ends; And pin contact pin 10 is connected to end under the signals collecting control panel 8, and described pin contact pin 10 is connected on the main control board.
Above the utility model that discloses can also have other various embodiments.Under the prerequisite that does not deviate from the utility model spirit and essence thereof; For the professional who is familiar with the present technique field; Can be at an easy rate make various corresponding changes and distortion according to the embodiment of the utility model; But these corresponding changes and distortion all do not break away from the spirit and the scope of the utility model, all should belong within the protection domain of the appended claim of the utility model.
Claims (5)
1. a fast detecting intelligence infrared gas sensor comprises air absorbing cavity, pyroelectricity probe and guard;
Said air absorbing cavity (4) is to comprise first gas absorption chamber (6) and second gas absorption chamber (11); Said first gas absorption chamber (6) is that its all sidewall is provided with 12 sidewall air holes (5), and corresponding, and said end face is provided with 12 end face air holes (18), and the two quadrature and coincide with the inner wall surface of air absorbing cavity (4); The outside cylinder of its first gas absorption chamber (6) is the first outside cylinder ladder table top (14) and the second outside cylinder ladder table top (15);
Said pyroelectricity probe (13) is arranged in second gas absorption chamber (11); When being provided with two pyroelectricity probes (13); The orthogonal thereto type 90o of two pyroelectricity probes (13) is provided with, or is nonopiate type 120o setting, and each pyroelectricity probe (13) is provided with two narrow band pass filter ports; One is reference edge, and another is an end of probe;
Said guard is to comprise first guard (3) and second guard (7), and said first guard (3) is the upper surface that is arranged at first gas absorption chamber (6); Said second guard (7) is in the annular groove (1) that is arranged at first gas absorption chamber (6).
2. a kind of fast detecting intelligence infrared gas sensor as claimed in claim 1, it is characterized in that: said first gas absorption chamber (6) is to be the dome-type structure.
3. a kind of fast detecting intelligence infrared gas sensor as claimed in claim 1, it is characterized in that: said second gas absorption chamber (11) is to be the scrobicula spherical structure.
4. a kind of fast detecting intelligence infrared gas sensor as claimed in claim 1, it is characterized in that: said first gas absorption chamber (6) and second gas absorption chamber (11) both ends of the surface circumferential abutment place are convex-concave centering location and make structure up.
5. a kind of fast detecting intelligence infrared gas sensor as claimed in claim 1, it is characterized in that: the axis of symmetry of said pyroelectricity probe (13) is provided with infrared light supply (9), and about the central point setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120358836 CN202256147U (en) | 2011-09-23 | 2011-09-23 | Quick detection intelligent infrared gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120358836 CN202256147U (en) | 2011-09-23 | 2011-09-23 | Quick detection intelligent infrared gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256147U true CN202256147U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120358836 Expired - Fee Related CN202256147U (en) | 2011-09-23 | 2011-09-23 | Quick detection intelligent infrared gas sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353645A (en) * | 2011-07-16 | 2012-02-15 | 太原理工大学 | NDIR (Non-Dispersive Infra-Red)-based intelligent infrared gas sensor |
| CN110207989A (en) * | 2019-05-29 | 2019-09-06 | 太原理工大学 | A kind of engine pedestal automatic centering regulating system |
| CN110687066A (en) * | 2019-09-17 | 2020-01-14 | 中国科学院上海微系统与信息技术研究所 | Infrared gas sensor |
| CN113366293A (en) * | 2019-01-25 | 2021-09-07 | 多传感器科学公司 | System and method for leak monitoring of measurements of optical absorption via use of a custom reflector facility |
| CN116879215A (en) * | 2023-07-18 | 2023-10-13 | 上海苏萨电子科技有限公司 | Non-dispersive infrared gas sensor |
-
2011
- 2011-09-23 CN CN 201120358836 patent/CN202256147U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353645A (en) * | 2011-07-16 | 2012-02-15 | 太原理工大学 | NDIR (Non-Dispersive Infra-Red)-based intelligent infrared gas sensor |
| CN102353645B (en) * | 2011-07-16 | 2012-12-19 | 太原理工大学 | NDIR (Non-Dispersive Infra-Red)-based intelligent infrared gas sensor |
| CN113366293A (en) * | 2019-01-25 | 2021-09-07 | 多传感器科学公司 | System and method for leak monitoring of measurements of optical absorption via use of a custom reflector facility |
| CN110207989A (en) * | 2019-05-29 | 2019-09-06 | 太原理工大学 | A kind of engine pedestal automatic centering regulating system |
| CN110687066A (en) * | 2019-09-17 | 2020-01-14 | 中国科学院上海微系统与信息技术研究所 | Infrared gas sensor |
| CN110687066B (en) * | 2019-09-17 | 2021-12-28 | 中国科学院上海微系统与信息技术研究所 | Infrared gas sensor |
| CN116879215A (en) * | 2023-07-18 | 2023-10-13 | 上海苏萨电子科技有限公司 | Non-dispersive infrared gas sensor |
| CN116879215B (en) * | 2023-07-18 | 2024-04-09 | 上海苏萨电子科技有限公司 | Non-dispersive infrared gas sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20140923 |
|
| EXPY | Termination of patent right or utility model |