Photoelectric instrument air tightness detector

A photoelectric instrument and air-tightness technology, which is applied in the direction of liquid-tightness measurement using liquid/vacuum degree, and by measuring the increase and deceleration rate of the fluid, can solve the problems of detection result errors, etc., to prevent mold and solve air-tightness the effectiveness of the robustness detection challenge, ensuring accuracy and reliability

Inactive Publication Date: 2014-10-08
ORDNANCE TECH RES INST OF THE GENERAL ARMAMENT DEPT PLA
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Problems solved by technology

[0004] The purpose of the present invention is to provide a photoelectric instrument air tightness detector to solve the problem that the air tightness detection depends on manual observation and the error of the detection result is relatively large

Method used

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  • Photoelectric instrument air tightness detector

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Embodiment Construction

[0026] Such as figure 1 As shown, the present invention is composed of a dew point meter, a nitrogen purity analyzer and a digital pressure gauge connected in series to form a nitrogen online quality analysis module to detect whether the nitrogen quality input into the photoelectric instrument under test meets the specified technical index requirements; the dew point meter , Nitrogen purity analyzer and digital pressure gauge are respectively connected with the vent valve, when the unqualified gas source is detected, under the control of the single-chip microcomputer control circuit, the corresponding gas source will be released in time.

[0027] Connected to the output end of the nitrogen online quality analysis module are two gas charging channels, each of which is equipped with a precision pressure reducing valve to decompress the 200kPa input gas source to two different low pressures; in each gas charging channel It is also connected with a composite on-off valve composed ...

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Abstract

The invention relates to an air tightness detector for a photoelectric instrument. The air tightness detector comprises a nitrogen on-line quality analysis module, a first air inflation channel, a second air inflation channel and a single-chip microcomputer control circuit, wherein the nitrogen on-line quality analysis module is formed by connecting a dew-point meter, a nitrogen purity analysis meter and a digital type pressure meter; the first air inflation channel is formed by connecting a first precise pressure reducing valve, a first magnetic valve and a first digital type pressure switch; the second air inflation channel is formed by connecting a second precise pressure reducing valve, a second magnetic valve and a second digital type pressure switch; the single-chip microcomputer control circuit is connected with each component, and the air quality of an input air source and the air inflation time, air inflation pressure and other indexes of the air inflation of the photoelectric instrument are monitored in real time. The air tightness detector for the photoelectric instrument disclosed by the invention is suitable for the air tightness detection of inner cavities of various precise photoelectric instruments, and can be widely used for the air tightness detection of newly developed or repaired photoelectric instruments in a photoelectric instrument development organization or repair factory.

Description

technical field [0001] The invention relates to an air tightness detection device, in particular to a photoelectric instrument air tightness detector. Background technique [0002] In order to ensure the normal use of precision optoelectronic instruments, the optoelectronic instruments must be filled with high-purity, low dew point nitrogen before leaving the factory or after repairs to prevent mold and fog inside the optoelectronic instruments. The pure nitrogen gas filled into the inner cavity of the optoelectronic instrument performs slow gas exchange through the connecting gaps of the various components of the optoelectronic instrument and the outside atmosphere. Relevant standards have strict requirements on the leakage point and leakage speed of the optoelectronic instrument. When the gas leakage rate is greater than the specified value, It is considered that the photoelectric instrument has air leakage. The photoelectric instrument with serious air leakage will cause ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/26
Inventor 张勇马东玺张岭王伟明孙江生张连武侯章亚冯广斌闫鹏程马振书
Owner ORDNANCE TECH RES INST OF THE GENERAL ARMAMENT DEPT PLA
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