Infrared optical platform for gas detection

Abstract

The utility model relates to the technical field of gas detection, and provides an infrared optical platform for gas detection, which comprises a main gas pipe, an infrared light source and an infrared detector, the main gas pipe is connected with a gas inlet pipe and a gas outlet pipe, two ends of the main gas pipe are respectively and detachably connected with a pressing block, a light-transmitting sheet is clamped between the pressing block and the main gas pipe, and the infrared light source is connected with the infrared detector. A first through hole used for an infrared light source is formed in the pressing block at one end, a second through hole used for containing an infrared detector is formed in the pressing block at the other end, and the first through hole, the second through hole and the main gas pipe are arranged on the same optical axis. The infrared light source penetrates through the gas and then irradiates the infrared detector, infrared light intensity detection after the gas is absorbed is achieved, disassembly, assembly, maintenance and component replacement are convenient, the gas absorption and response speed is high, and the accuracy of a measurement result and the stability of system operation are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection, in particular to an infrared optical platform for gas detection. Background Art

[0002] As a fast and accurate gas analysis technology, the infrared optical platform's basic principle is to detect the absorption characteristics of gas molecules for infrared light of a specific wavelength. It is widely used in fields such as motor vehicle exhaust emission detection, gas analyzers, and system integration. Currently, conventional light source modulation is performed using mechanical transmission. This method requires the light source to be powered on for a long time, which can easily cause the light source filament to age, thus reducing its service life. It also places high demands on the coaxiality of the transmission part, resulting in high power consumption and poor stability. Furthermore, the gas being measured often contains particulate contaminants or moisture, which is adsorbed and remains inside the platform, making it difficult to disassemble and clean. Utility Model Content

[0003] The purpose of the utility model is to provide an infrared optical platform for gas detection, which solves the above technical problems and ensures the accuracy of measurement results and the stability of system operation.

[0004] The utility model is realized through the following technical solutions: an infrared optical platform for gas detection, comprising a main gas pipe, an infrared light source and an infrared detector, the main gas pipe being connected to an air inlet pipe and an air outlet pipe, pressure blocks being detachably connected at both ends of the main gas pipe, a light-transmitting sheet being sandwiched between the pressure block and the main gas pipe, a first through hole for the infrared light source being opened on the pressure block at one end, and a second through hole for placing the infrared detector being opened on the pressure block at the other end, the first through hole, the second through hole and the main gas pipe being arranged on the same optical axis.

[0005] Furthermore, sealing rings are provided between the light-transmitting sheet and the main air pipe, and between the light-transmitting sheet and the pressing block.

[0006] Furthermore, the infrared light source adopts an electrically modulated pulse infrared light source.

[0007] Furthermore, the air inlet pipe and the air outlet pipe are threadedly and sealedly connected to the side wall of the main air pipe, the air inlet pipe is close to one end of the infrared light source, and the air outlet pipe is close to one end of the infrared detector.

[0008] Furthermore, the pressing block is connected to the end of the main air pipe through a screw.

[0009] Furthermore, the main air pipe and the pressing block are both made of aluminum alloy.

[0010] Furthermore, the pressing block is provided with a mounting hole for connecting to the circuit board.

[0011] The present invention has at least the following advantages and beneficial effects: through the detachable assembly of the main air pipe, the pressure block and the light-transmitting sheet, the gas to be measured is introduced into the main air pipe from the air inlet pipe, the infrared light source penetrates the gas and irradiates the infrared detector, thereby realizing the detection of the infrared light intensity after gas absorption, facilitating disassembly, maintenance and replacement of components, having good gas absorption and response speed, thereby ensuring the accuracy of the measurement results and the stability of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 A cross-sectional view of an infrared optical platform for gas detection provided by the utility model;

[0014] Figure 2 This is a side view of an infrared optical platform for gas detection provided by the utility model;

[0015] Icon: 1-main air pipe, 11-inlet pipe, 12-outlet pipe, 2-pressing block, 20-mounting hole, 21-first through hole, 22-second through hole, 3-light-transmitting sheet, 4-sealing ring, 5-screw. DETAILED DESCRIPTION

[0016] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0018] Example

[0019] like Figure 1 、 2As shown, in this embodiment, an infrared optical platform for gas detection is mainly disclosed, which is suitable for measuring NO gas in automobile exhaust emission monitoring and environmental monitoring. It has a reasonable and compact structure and is convenient for flexible layout. It includes a main air pipe 1, an infrared light source and an infrared detector. The main air pipe 1 is connected to an air inlet pipe 11 and an air outlet pipe 12. Both ends of the main air pipe 1 are detachably connected to a pressing block 2. A light-transmitting sheet 3 is sandwiched between the pressing block 2 and the main air pipe 1. A first through hole 21 for the infrared light source is opened on the pressing block 2 at one end, and a second through hole 22 for placing the infrared detector is opened on the pressing block 2 at the other end. The first through hole 21, the second through hole 22 and the main air pipe 1 are arranged on the same optical axis; specifically, the main air pipe 1 can be a square tube with a channel opened in the middle, and the pressing block 2 is connected through The screw 5 is connected to the end of the main air pipe 1 to realize the detachable connection between the pressure block 2 and the main air pipe 1. The platform adopts a modular detachable assembly, which is convenient for disassembly, maintenance and replacement of parts. During measurement, the gas to be measured is introduced into the main air pipe 1 from the air inlet pipe 11, and then flows out from the air outlet pipe 12 and is led to a safe place outdoors, forming a flow airway in the main air pipe 1. The infrared light source passes through the transparent sheet 3, the gas to be measured, and another transparent sheet 3 in turn and then shines on the infrared detector to realize the detection of the intensity of the infrared light after being absorbed by the gas, and outputs a corresponding voltage signal according to the light intensity. The first through hole 21, the second through hole 22 and the main air pipe 1 are arranged on the same optical axis, so that the infrared light source and the infrared detector are in the same straight line, ensuring that the gas absorption and response speed are optimal.

[0020] Furthermore, in a specific implementation, a sealing ring 4 is provided between the above-mentioned light-transmitting sheet 3 and the main air pipe 1, and between the light-transmitting sheet 3 and the pressure block 2 provided in the embodiment of the utility model; specifically, the sealing ring 4 can be a high-temperature fluororubber ring, which has the characteristics of oil resistance, temperature resistance and pollution resistance, effectively ensures that the air path is sealed reliably, prevents the infiltration of non-measurement gas, and can effectively ensure the accuracy of the measurement results and the stability of the system operation.

[0021] Furthermore, in specific implementation, the above-mentioned infrared light source provided in the embodiment of the utility model adopts an electrically modulated pulse infrared light source, which can ensure that the wavelength of the emitted infrared light is within a specific range, has low power consumption and no heat, improves the stability of the platform, and extends the service life of the equipment.

[0022] Furthermore, in a specific implementation, the air inlet pipe 11 and the air outlet pipe 12 provided in the embodiment of the utility model are threadedly and sealedly connected to the side wall of the main air pipe 1, with the air inlet pipe 11 close to one end of the infrared light source and the air outlet pipe 12 close to one end of the infrared detector; specifically, the air inlet pipe 11 and the air outlet pipe 12 can also be sealed with a high-temperature fluororubber ring to effectively prevent gas leakage and ensure the safety of the experimental environment.

[0023] Furthermore, in the specific implementation, the above-mentioned main air pipe 1 and pressure block 2 provided in the embodiment of the utility model are made of aluminum alloy, which is light, high-strength and has excellent corrosion resistance, can reduce the overall weight of the platform, and increase its service life, and is suitable for a variety of environmental conditions.

[0024] Furthermore, in a specific implementation, a mounting hole 20 for connecting to a circuit board is provided on the pressing block 2 provided in the embodiment of the present utility model.

[0025] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An infrared optical platform for gas detection, comprising a main gas pipe (1), an infrared light source and an infrared detector, wherein the main gas pipe (1) is connected to an inlet pipe (11) and an outlet pipe (12), and is characterized in that: Both ends of the main air pipe (1) are detachably connected to a pressure block (2), a light-transmitting sheet (3) is sandwiched between the pressure block (2) and the main air pipe (1), a first through hole (21) for the infrared light source is provided on the pressure block (2) at one end, and a second through hole (22) for placing the infrared detector is provided on the pressure block (2) at the other end, and the first through hole (21), the second through hole (22) and the main air pipe (1) are arranged on the same optical axis.

2. The infrared optical platform for gas detection according to claim 1, characterized in that: Sealing rings (4) are provided between the light-transmitting sheet (3) and the main air pipe (1), and between the light-transmitting sheet (3) and the pressing block (2).

3. The infrared optical platform for gas detection according to claim 1, characterized in that: The infrared light source is an electrically modulated pulse infrared light source.

4. The infrared optical platform for gas detection according to claim 1, characterized in that: The air inlet pipe (11) and the air outlet pipe (12) are threadedly sealed and connected to the side wall of the main air pipe (1), the air inlet pipe (11) is close to one end of the infrared light source, and the air outlet pipe (12) is close to one end of the infrared detector.

5. The infrared optical platform for gas detection according to claim 1, characterized in that: The pressing block (2) is connected to the end of the main air pipe (1) via a screw (5).

6. The infrared optical platform for gas detection according to claim 1, characterized in that: The main air pipe (1) and the pressing block (2) are both made of aluminum alloy.

7. The infrared optical platform for gas detection according to claim 1, characterized in that: The pressing block (2) is provided with a mounting hole (20) for connecting to a circuit board.

Images