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Portable negative pressure sensor field calibration device

A negative pressure sensor and on-site calibration technology, which is applied in the field of measurement, can solve the problems of not being able to meet the calibration requirements of the negative pressure sensor, and cannot form a positive pressure environment higher than the local atmospheric pressure at the same time, and achieve a reasonable design, small size, and guaranteed calibration accuracy. Effect

Inactive Publication Date: 2018-06-22
XIAN AEROSPACE PROPULSION TESTING TECH RES INST
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AI Technical Summary

Problems solved by technology

[0004] The current portable vacuum calibration device with similar functions only calibrates the vacuum degree, and can only generate a negative pressure environment lower than the local atmospheric pressure, and cannot form a positive pressure environment higher than the local atmospheric pressure at the same time, so it cannot meet the maximum range higher than Negative pressure sensor calibration requirements for local atmospheric pressure

Method used

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  • Portable negative pressure sensor field calibration device
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  • Portable negative pressure sensor field calibration device

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Embodiment Construction

[0030] Embodiments of the present invention are described in detail below, and the embodiments are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0031] The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0032] The on-site calibration device for the portable negative pressure sensor in this embodiment, the appearance of the device is as attached Figure 4 As shown, the internal connection structure is as attached figure 1 shown. Mainly include: 1) mini pump for pumping and pumping, 2) pipeline safety valve, 3...

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Abstract

The invention provides a portable negative pressure sensor field calibration device. A miniature pump-and-pull dual-purpose air pump is used to connect a miniature air storage tank. Through controlling the switches of four two-position two-pass solenoid valves, automatic switching of an air exhaust or pumping air channel is realized. Two kinds of work modes, which are vacuum pumping and pressurization, are established. The precision regulating valve of a tee-junction structure is used to cooperate with a high-precision digital display pressure meter so that the pressure in the air storage tankcan be accurately controlled and a 10-300KPa continuous-adjustable pressure environment is formed. All components are installed in a calibration box which has a small size and is convenient to carry.The design of the device is reasonable, operation is simple and carrying is convenient. The device is suitable for negative pressure sensor calibration in a test and industrial field environment.

Description

technical field [0001] The invention specifically relates to a calibration device for negative pressure sensors in test and industrial sites, which is suitable for on-site calibration of 0-250KPa negative pressure sensors and belongs to the field of measurement. Background technique [0002] Negative pressure sensors are widely used in aerospace, military, medical, test and industrial field pressure monitoring, and are the main equipment for pressure judgment. Because the calibration requires both negative pressure (lower than atmospheric pressure) and positive pressure (higher than atmospheric pressure) environments, it is difficult to achieve under test and industrial field conditions, and professional negative pressure sensor calibration equipment has high requirements for use conditions and environments and is not easy to carry. , mainly used in laboratory environments. [0003] In practical applications, if the on-site calibration of the negative pressure sensor is rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L27/00
CPCG01L27/005
Inventor 闫磊兰宝刚杨建宏左红星魏连东郭小帆汪玲雷晓龙
Owner XIAN AEROSPACE PROPULSION TESTING TECH RES INST
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