A dual-light source dual-light path infrared gas detector

Abstract

The present invention provides a dual-light source dual-light path infrared gas detector, comprising a rear mirror body module, a display module and a front mirror body module, wherein the front mirror body module comprises a mirror body, a power board and a main control board, wherein a photodetector and an optical component are installed in the mirror body, wherein the photodetector and the power board are electrically connected to the main control board respectively; wherein a DB15 connector is also provided on the power board; wherein a reflector is provided at one end of the mirror body away from the power board, wherein a sapphire lens is provided between the reflector and the optical component; wherein the optical component comprises an optical chamber, an infrared measurement light source and an infrared reference light source, wherein the light emitted by the infrared reference light source directly irradiates the photodetector; wherein the light emitted by the infrared measurement light source irradiates the reflector via the sapphire lens and is reflected by the reflector to the photodetector. The present invention has the advantages of compact structure and the ability to realize on-site reading.

Description

Technical Field

[0001] The invention relates to an infrared gas detector, in particular to a dual-light-source dual-light-path infrared gas detector. Background Art

[0002] Infrared gas detectors use the non-dispersive infrared (NDIR) principle to detect target gases in the air. Traditional infrared gas detectors only have one light source and one optical path. The light source, optical cavity, photoelectric detector, etc. are exposed to the air. They are not only susceptible to dust and water vapor, but also cannot avoid the impact of detector receiving sensitivity attenuation on measurement accuracy. They have poor long-term stability and no display module. On-site reading is inconvenient and the user experience is poor.

[0003] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0004] The object of the present invention is to address the deficiencies of the prior art and thus provide a double-light source double-light path infrared gas detector which has a compact structure and can realize on-site reading.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a dual-light source dual-light path infrared gas detector, comprising a rear mirror body module, a display module installed on one side of the rear mirror body module, and a front mirror body module with one end installed on the other side of the rear mirror body module.

[0006] The front mirror body module includes a mirror body, a power board and a main control board fixed on the mirror body, a photoelectric detector and an optical component are installed in the mirror body, and the photoelectric detector and the power board are electrically connected to the main control board respectively; the power board and the main control board are both provided with through holes for the photoelectric detector and the optical component to pass through; the power board is also provided with a DB15 connector, and the power board is connected to the display module through the DB15 connector;

[0007] A reflector is arranged at one end of the mirror body away from the power board, and a sapphire lens is arranged between the reflector and the optical component;

[0008] The optical component includes an optical chamber and an infrared measurement light source and an infrared reference light source which are arranged outside the optical chamber in a direction opposite to each other. The light emitted by the infrared reference light source directly irradiates the photodetector. The light emitted by the infrared measurement light source irradiates the reflector through the sapphire lens and is reflected by the reflector to the photodetector.

[0009] Based on the above, the mirror body includes a fixing ring for threaded connection with the rear mirror body module, an air chamber installed at one end on the fixing ring, and a reflector mounting ring fixedly installed at the other end of the air chamber, and the reflector is mounted on the reflector mounting ring through a reflector pressure ring; a sapphire mounting ring is arranged inside the fixing ring, and the sapphire lens is mounted on the sapphire mounting ring through a sapphire lens pressure ring; a board mounting ring is fixedly installed on the side of the fixing ring away from the air chamber, and the power board and the main control board are respectively installed on the board mounting ring; the photoelectric detector and the optical component are fixedly installed on the fixing ring.

[0010] Based on the above, the air chamber is an open air chamber and is provided with a ventilation chimney.

[0011] Based on the above, the fixing ring is located at one side of the air chamber and is also threadedly connected with a dustproof cylinder.

[0012] Based on the above, it also includes a rear end cover module, and the rear end cover module is covered on the rear mirror body module.

[0013] Based on the above, a transparent window is opened in the middle of the rear end cover module.

[0014] Based on the above, the display module is an LCD dot matrix screen.

[0015] Compared with the prior art, the present invention has outstanding substantial features and significant progress. Specifically, the present invention integrates a photoelectric detector, a main control board, a power board, an optical path structure and a display structure into one device, so that users can read the readings on the spot, thereby improving the satisfaction of the user experience; at the same time, by setting the air chamber as an open air chamber with a ventilated chimney, the response speed of the system can be effectively improved; the mirror body is located on one side of the air chamber and is also threadedly connected to a dustproof cylinder, which further reduces the influence of unstable factors such as dust or corrosive gases on the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural explosion diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the structural explosion of the rear mirror module of the present invention.

[0018] In the figure: 1. rear end cover module; 2. display module; 3. rear mirror module; 4. front mirror module; 5. dust tube module; 6. power board; 7. DB15 connector; 8. main control board; 9. photodetector; 10. optical chamber; 11. infrared measurement light source; 12. infrared reference light source; 13. sapphire lens pressing ring; 14. sapphire lens; 15. fixing ring; 16. board mounting ring; 17. air chamber; 18. reflector mounting ring; 19. reflector; 20. reflector pressing ring. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0020] The present invention provides a dual-light source dual-light path infrared gas detector, such as Figure 1 As shown, it includes a rear mirror body module 3, a display module 2 installed on one side of the rear mirror body module 3, and a front mirror body module 4 with one end installed on the other side of the rear mirror body module 3. Preferably, the display module 2 is an LCD dot matrix screen.

[0021] Furthermore, in order to prevent dust from falling onto the display module 2 and affecting the user's observation of the information on the display module 2, the gas detector also includes a rear end cover module 1, and the rear end cover module 1 is covered on the rear mirror body module 3. Preferably, a transparent window is opened in the middle of the rear end cover module 1, so that the information on the display module 2 can be observed without opening the rear end cover module 1.

[0022] like Figure 2 As shown, the front mirror body module 4 includes a mirror body and a power board 6 and a main control board 8 fixedly mounted on the mirror body. A photodetector 9 and an optical component are installed in the mirror body, and the photodetector 9 and the power board 6 are electrically connected to the main control board 8 respectively; the power board 6 and the main control board 8 are both provided with through holes for the photodetector 9 and the optical component to pass through; the power board 6 is also provided with a DB15 connector 7, and the power board 6 is connected to the display module 2 through the DB15 connector 7;

[0023] A reflector is disposed at one end of the mirror body away from the power board 6, and a sapphire lens 14 is also disposed between the reflector and the optical component;

[0024] The optical assembly includes an optical chamber 10 and an infrared measurement light source 11 and an infrared reference light source 12 which are arranged outside the optical chamber 10 in a direction opposite to the infrared reference light source 12. The infrared reference light source 12 is used for reference. The light emitted by the infrared reference light source 12 does not react with the gas to be measured, but directly irradiates the photodetector 9 to form an independent optical path, which plays a role in filtering out the influence of environmental factors such as temperature, humidity, and dust on the measurement accuracy. The infrared measurement light source 11 is used to measure gas. The light emitted by the infrared measurement light source 11 reacts with the gas to be measured after passing through the sapphire lens 14, and is reflected to the photodetector 9 by the reflector 19 to form an independent optical path. Preferably, the reflector 19 is a concave reflector 19. The light emitted by the infrared measurement light source 11 is reflected by the concave reflector, which increases the optical path and is conducive to improving the resolution.

[0025] Specifically, the mirror body includes a fixing ring 15 for threaded connection with the rear mirror body module 3, an air chamber 17 installed at one end on the fixing ring 15, and a reflector mounting ring 18 fixedly mounted at the other end of the air chamber 17, and the reflector 19 is mounted on the reflector mounting ring 18 through a reflector pressure ring 20; a sapphire mounting ring is arranged in the fixing ring 15, and the sapphire lens 14 is mounted on the sapphire mounting ring through a sapphire lens pressure ring 13; a board mounting ring 16 is fixedly mounted on the side of the fixing ring 15 away from the air chamber 17, and the power board 6 and the main control board 8 are respectively mounted on the board mounting ring 16; the photodetector 9 and the optical component are fixedly mounted on the fixing ring 15.

[0026] The present invention integrates the photoelectric detector 9, the main control board 8, the power board 6, the optical path structure and the display structure into one device, so that the user can read the readings on the spot, which improves the satisfaction of the user experience and also avoids the infrared reference light source 12, the infrared measurement light source 11, the photoelectric detector 9, the power board 6 and the main control board 8 being exposed to the air, which not only reduces the influence of factors such as dust on the detection results but also prolongs the service life of the above-mentioned equipment.

[0027] Preferably, the air chamber 17 is an open air chamber 17 provided with an air chimney to effectively improve the response speed of the system; further, the fixing ring 15 located on one side of the air chamber 17 is also threadedly connected with a dustproof cylinder to further reduce the influence of unstable factors such as dust or corrosive gas on the detection results.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A dual-light source dual-light path infrared gas detector, characterized in that: It includes a rear mirror body module, a display module installed on one side of the rear mirror body module, and a front mirror body module with one end installed on the other side of the rear mirror body module, and also includes a rear end cover module, the rear end cover module is covered on the rear mirror body module; the display module is an LCD dot matrix screen; The front mirror body module includes a mirror body, a power board and a main control board fixed on the mirror body, a photoelectric detector and an optical component are installed in the mirror body, and the photoelectric detector and the power board are electrically connected to the main control board respectively; the power board and the main control board are both provided with through holes for the photoelectric detector and the optical component to pass through; the power board is also provided with a DB15 connector, and the power board is connected to the display module through the DB15 connector; A reflector is arranged at one end of the mirror body away from the power board, and a sapphire lens is arranged between the reflector and the optical component; The optical assembly includes an optical chamber, and an infrared measurement light source and an infrared reference light source disposed outside the optical chamber in a direction opposite to each other, wherein the light emitted by the infrared reference light source does not react with the gas to be measured and directly irradiates the photoelectric detector; The light emitted by the infrared measurement light source is irradiated to the reflector through the sapphire lens and is reflected to the photoelectric detector through the reflector.

2. The dual-light source dual-light path infrared gas detector according to claim 1 is characterized in that: The mirror body includes a fixing ring for threaded connection with the rear mirror body module, an air chamber installed at one end on the fixing ring, and a reflector mounting ring fixedly installed at the other end of the air chamber, and the reflector is mounted on the reflector mounting ring through a reflector pressing ring; a sapphire mounting ring is arranged inside the fixing ring, and the sapphire lens is mounted on the sapphire mounting ring through a sapphire lens pressing ring; a board mounting ring is fixedly installed on the side of the fixing ring away from the air chamber, and the power board and the main control board are respectively mounted on the board mounting rings; the photoelectric detector and the optical component are fixedly installed on the fixing ring.

3. The dual-light source dual-light path infrared gas detector according to claim 2 is characterized in that: The air chamber is an open air chamber and is provided with a ventilation chimney.

4. The dual-light source dual-light path infrared gas detector according to claim 3 is characterized in that: The fixing ring is located at one side of the air chamber and is also threadedly connected with a dustproof cylinder.

5. The dual-light source dual-light path infrared gas detector according to claim 1, characterized in that: A transparent window is provided in the middle of the rear end cover module.

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