Infrared gas sensor

A gas sensor, infrared receiver technology, applied in instruments, scientific instruments, measuring devices, etc., can solve the problems of poor real-time performance, increased production cost and installation difficulty, slow gas exchange speed, etc., to reduce light energy leakage, avoid The loss of infrared light energy, the effect of improving the reflectivity

Inactive Publication Date: 2013-06-05
GUANGDONG ZONOPO INTELLIGENT TECH
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Problems solved by technology

[0003] In order to meet people's higher and higher requirements for the accuracy of gas sensors, the main aspect of improving the accuracy of infrared gas sensors is to increase the distance traveled by infrared light in the gas to be measured (that is, the effective absorption path). Infrared gas sensors generally improve the accuracy by increasing the volume of the gas sensor by physical distance, which increases

Method used

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Examples

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Embodiment

[0025] like figure 1 , 2 As shown, an infrared gas sensor includes a power supply connected in sequence, a sensitive probe, a signal receiving circuit, an amplification circuit, an analog-to-digital conversion circuit, a control circuit, and an output display circuit. The sensitive probe includes a gas chamber, an infrared light source, an infrared receiving device and five reflectors arranged at equal intervals on the inner wall of the gas chamber, the pins of the infrared light source and the infrared receiver pass through the gas chamber wall and are connected to the external circuit, and the infrared receiver includes a detection terminal and a reference terminal , the detection end consists of a first pyroelectric detector and a first filter sensitive to target gas, light intensity and temperature, and the reference end consists of a second pyroelectric detector and a filter sensitive only to light intensity and temperature Composed of the second filter; the infrared lig...

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Abstract

The invention relates to an infrared gas sensor. The infrared gas sensor comprises a power supply, a sensitive probe, a signal receiving circuit, an amplifying circuit, an analog-to-digital conversion circuit, a control circuit and an output display circuit. The sensitive probe comprises an air chamber, an infrared source, an infrared receiver, and five retroreflectors. Pins of the infrared source and the infrared receiver are connected with an external circuit through an air chamber wall. The five retroreflectors are arranged on the inner wall of the air chamber at the same interval. The infrared source and the infrared receiver are arranged on the inner walls between any two adjacent retroreflectors in reversal integration mode. Infrared lights are sent out from the infrared light source, back to the infrared receiver through reflection of the five retroreflectors, and form a regular pentagon light path. The regular pentagon light path and the inner wall of the air chamber are internally tangent. A plurality of ventholes are formed in the inner walls between the two adjacent retroreflectors. Accuracy of the infrared sensor is improved, gas exchange rate is increased, the gas sensor is quick in response and strong in real-time performance.

Description

technical field [0001] The invention relates to the technical field of gas sensors, in particular to an infrared gas sensor with small volume, high precision and fast response speed. Background technique [0002] A gas sensor is a converter that converts a certain gas volume fraction into a corresponding electrical signal. The technology of detecting the concentration of the target gas by using the absorption characteristics of the gas to be measured on the infrared spectrum has been continuously developed. Its application range is also more and more extensive, such as the monitoring of gas concentration in mines and garbage drilling, the monitoring of oil refineries in the petrochemical industry, oil pipelines and natural gas pipelines, etc. As infrared gas sensor technology becomes more and more mature and its cost is reduced and its installation and portability become more convenient, infrared gas sensors are gradually applied to gas monitoring in public places, even hom...

Claims

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Application Information

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IPC IPC(8): G01N21/35G01N21/01G01N21/3504
Inventor 不公告发明人
Owner GUANGDONG ZONOPO INTELLIGENT TECH
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