Infrared gas transducer and infrared gas inspection device

A gas sensor and infrared detector technology, applied in the detection field, can solve the problems of low detection signal-to-noise ratio and low measurement accuracy, and achieve the effects of increasing optical path length, sufficient absorption, and improving detection signal-to-noise ratio and measurement accuracy.

Active Publication Date: 2009-08-12
SHENZHEN EXSAF ELECTRONICS CO LTD
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  • Abstract
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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide an infrared gas sensor, aiming to solve the problems of low detection signal-to-noise ratio and low measurement accuracy in existing infrared gas sensors

Method used

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  • Infrared gas transducer and infrared gas inspection device
  • Infrared gas transducer and infrared gas inspection device
  • Infrared gas transducer and infrared gas inspection device

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Embodiment Construction

[0012] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0013] figure 1 The structure of the infrared gas sensor provided by the embodiment of the present invention is shown, and for the convenience of description, only the parts related to the embodiment of the present invention are shown.

[0014] The infrared gas sensor includes a housing 101, the top of the housing 101 is provided with a first air vent, the first air vent is provided with a powder metallurgy sheet 102, the inside of the housing 101 is also provided with a sensor housing 103, and the top of the sensor housing 103 is also provided with a first air vent. A vent corresponds to the seco...

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Abstract

The invention is suitable for the technical field of detection, and provides an infrared gas sensor and an infrared gas detection device. The infrared gas sensor comprises a shell; the inside of the shell is also provided with a sensor shell; the inside of a cavity of the sensor shell is provided with an upper cover body and a lower cover body; the bottom of the upper cover body is provided with a groove; the side wall of the groove at least comprises a first inclined surface and a second inclined surface; the top of the lower cover body is provided with a first opening and a second opening which can correspond to the first inclined surface and the second inclined surface on the groove; and an infrared light source and an infrared probe are arranged in the first opening and the second opening respectively. In the invention, the infrared light emitted by the infrared light source is reflected for many times and then is absorbed by the infrared probe; and the infrared gas sensor increases the light path length of the infrared light and ensures that gas to be tested fully absorbs the infrared light, thereby improving the detection signal-to-noise ratio and measurement accuracy of the infrared gas sensor.

Description

technical field [0001] The invention belongs to the technical field of detection, and in particular relates to an infrared gas sensor and an infrared gas detection device. Background technique [0002] The technology of using infrared to detect gas concentration has a long history. The basic principle is that the light source emits infrared light. When the infrared light passes through the gas to be tested, these gas molecules absorb the infrared light of a specific wavelength, and the absorbed gas is detected by an optical detector. The intensity of the infrared light, and the intensity of the absorbed infrared light and the gas concentration conform to the Lambert-Beer (Lambert-Beer) absorption law, and the measured gas concentration can be obtained by calculation. [0003] The existing infrared gas sensor adopts a gas chamber structure in which the relative positions of the infrared light source and the optical detector are linear. When the volume of the sensor is limited...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/3504
Inventor 王毅张一珩葛逢春马英花
Owner SHENZHEN EXSAF ELECTRONICS CO LTD
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