Dynamic parameter measuring system for humidity sensor

A humidity sensor and dynamic parameter technology, applied in the field of humidity sensor dynamic parameter measurement system, can solve the problem of not considering temperature, wind speed, etc.

Inactive Publication Date: 2011-07-20
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA +1
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AI Technical Summary

Problems solved by technology

At present, the performance evaluation of humidity sensors is limited to the measurement of accuracy level, response time, hysteresis and other parameters under static conditions. To be precise, this measurement does not consider the influence of factors such as temperature and wind speed, which is different from the actual use environment. big difference

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  • Dynamic parameter measuring system for humidity sensor
  • Dynamic parameter measuring system for humidity sensor
  • Dynamic parameter measuring system for humidity sensor

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Embodiment Construction

[0013] The present invention will be described in detail below with reference to the accompanying drawings.

[0014] like figure 1 , figure 2 The shown humidity sensor dynamic parameter measurement system of the present invention mainly includes 1# humidity generator 1, 2# humidity generator 2, 1# test room 3, tested sensor switching device 4, 2# test room 5, control unit 6, measurement Unit 7, measurement and control computer 8, gas path 22 and gas path 23.

[0015] The measurement process of the present invention is as follows:

[0016] 1. Measurement of dynamic measurement error

[0017] 1# Humidity Generator 1 (or 2# Humidity Generator 2) generates gas with a certain temperature, flow rate and humidity under the control of measurement and control computer 8 and sends it to 1# Test Room 3 (or 2# Test Room 5). The gas humidity in 1# test room 3 (or 2# test room 5) reaches stability after a certain period of time, and the measurement and control computer 8 controls the m...

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Abstract

The invention discloses a dynamic parameter measuring system for a humidity sensor. The system comprises two humidity generators, two humidity sensor testing chambers, two wind velocity adjusting devices, a pneumatic switching device, a (temperature, humidity and wind velocity) measuring unit, a control unit and a measurement and control computer. The two humidity generators generate high-humidity gas and low-humidity gas at different temperatures respectively; and the high-humidity gas and the low-humidity gas generate required wind velocities through the wind velocity adjusting devices. The pneumatic switching device implements quick switching of the humidity sensor between a high-humidity gas source and a low-humidity gas source. The invention provides the measuring system for measuring the parameters such as error, response time, dampness stagnation and the like of the humidity sensor at different wind velocities, different temperatures and different humidity step values.

Description

technical field [0001] The invention relates to a dynamic parameter measurement system of a humidity sensor, more particularly, the invention relates to a measurement system of gas humidity, response time and hysteresis of a humidity sensor under different temperature and wind speed conditions. Background technique: [0002] Humidity sensor is a sensitive element used to measure the humidity of gas. It is composed of humidity-sensitive elements such as humidity-sensitive capacitors, humidity-sensitive resistors or humidity-sensitive resonators and their conversion circuits. It can directly display humidity. Sensors with measurable signals such as current and frequency. Its measurement accuracy, response time and wet hysteresis are important indicators to evaluate its performance. [0003] Since the humidity sensors are all contact measurement methods, that is, only when the measured gas completely replaces the original gas atmosphere on the surface of the humidity sensor in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
Inventor 陈振林周庆福张海波吕国义杨斌
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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