A two-way self-cleaning optical fiber gas sensor sensing head
A gas sensor and sensor head technology, applied in instruments, measuring devices, scientific instruments, etc., can solve problems such as affecting measurement accuracy and polluting mirror surfaces, and achieve the effects of ensuring accuracy, simple structure, and convenient installation.
Active Publication Date: 2017-02-22
VITALONG FIRE SAFETY GRP
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Problems solved by technology
In industrial application sites, especially when the purge air source is intermittent, this situation often occurs: environmental dust and water vapor will take the opportunity to contaminate the mirror surface and accumulate in the dead corner of the purge, especially when oil stains are on the mirror surface After the oil stain is formed, it is no longer easy to blow it off. Frequent cleaning and maintenance are not easy in such heavily polluted occasions, which will affect the final measurement accuracy
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[0018] Below in conjunction with accompanying drawing, the present invention is described in detail.
[0019] 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.
[0020] Such as Figure 1-4 As shown, a two-way self-cleaning optical fiber gas sensor sensing head includes an optical fiber signal transceiver unit, an optical fiber signal reflection unit and a two-way purge unit.
[0021] Wherein, the optical fiber signal transceiver unit includes an optical fiber group 1 and a two-way transparent mirror 2, a sheath 13 is placed on the optical fiber group 1, and the optical fiber group 1 covered by the sheath 13 is connected to the inner hole of the positionin...
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The invention discloses a bidirectional self-cleaning type optical fiber gas sensor probe. The bidirectional self-cleaning type optical fiber gas sensor probe comprises an optical fiber signal receiving-transmitting unit, an optical fiber signal reflection unit and a bidirectional blowing unit, wherein the optical fiber signal receiving-transmitting unit comprises an optical fiber set and a bidirectional light transmitting mirror; the optical fiber signal reflection unit comprises a reflection mirror and a reflection mirror cover; a certain focal length is kept between the bidirectional light transmitting mirror and the reflection mirror; the bidirectional blowing unit comprises a gas path connector connected with an external high-pressure gas source; the gas path connector is connected with a main body; the main body is provided with a self-cleaning gas path communicated with the gas path connector; the end face, facing the bidirectional light transmitting mirror, of the reflection mirror cover is in a circular-arc inclined plane structure; high-pressure gas is blown towards a mirror surface of the reflection mirror through the self-cleaning gas path; and after the gas is reflected by the circular-arc inclined plane structure of the reflection mirror cover, the gas is blown towards the mirror surface of the bidirectional light transmitting mirror. According to the bidirectional self-cleaning type optical fiber gas sensor probe, the bidirectional blowing unit is arranged so that the bidirectional self-cleaning type optical fiber gas sensor probe can be suitable for environment fields interfered by oil gas or water vapor and flying ash, and polluted environment fields, and the concentrations of different medium gases are detected.
Description
technical field [0001] The invention belongs to the technical field of detection of gas concentrations in different media, in particular to a sensing head of a bidirectional self-cleaning optical fiber gas sensor. Background technique [0002] When the fiber optic sensor is used for gas concentration measurement, it collects the concentration of the gas to be measured through its fiber optic light guide system. When it is used for industrial online measurement, the optical lens of the measurement optical path of the fiber optic sensor will be interfered by water vapor and dust in the environment. And pollution, in the oil storage environment, it will be polluted by oil and gas, which will often affect the use effect and test accuracy of the sensor head of the optical fiber sensor. [0003] In the field of optics, for the optical measuring head with the usual structure, the emission or reflective mirror surface on the upper part is usually perpendicular to the measuring optic...
Claims
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IPC IPC(8): G01N21/17
Inventor 汪映标张宗勤张宁甲吴明军
Owner VITALONG FIRE SAFETY GRP