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Device and method for measuring response and recovery time of humidity sensor

A humidity sensor and recovery time technology, applied in measurement devices, instruments, scientific instruments, etc., can solve problems such as the inability to meet the response time test, and achieve the effect of meeting the needs of automated measurement

Active Publication Date: 2022-04-19
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to overcome the problem that the humidity sensor response and recovery time measurement device in the prior art cannot meet the requirements of the response time test, and provide a humidity sensor response and recovery time measurement device and method, the device It can provide standardized humidity step change, and perform humidity compensation on both sides of the humidity step change at the same time as the humidity step change; this method can compensate the response time for the error caused by the humidity step change, so that the humidity sensor can be realized High-precision, idealized measurements of response and recovery times

Method used

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  • Device and method for measuring response and recovery time of humidity sensor
  • Device and method for measuring response and recovery time of humidity sensor
  • Device and method for measuring response and recovery time of humidity sensor

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Embodiment 1

[0028] refer to figure 1As shown, a humidity sensor response and recovery time measurement device of the present invention includes an outer box 1, an inner box 2, a humidity generating device 3 and a humidity compensation device 11, and the inner box 2 is arranged in the outer box 1 , the inner box 2 is provided with a drive assembly 10 and a test bracket 9 for placing the sensor to be tested, a skylight is provided on the side wall of the inner box 2, and the drive assembly 10 drives the test bracket 9 from the The skylight enters and exits the inner box 2 and the outer box 1; the humidity generating device 3 communicates with the inner box 2 and the outer box 1 through a pipeline, and a solenoid valve 4 for controlling the switch is set on the pipeline. The humidity compensation device 11 is electrically connected to the solenoid valve 4, and the humidity compensation device 11 outputs modulated PWM through a PID algorithm with humidity compensation to adjust the switching ...

Embodiment 2

[0044] refer to image 3 As shown, a humidity sensor response and recovery time measurement method of the present invention, using the above-mentioned humidity sensor response and recovery time measurement device, includes the following steps:

[0045] (1) Turn on the measurement device, the test bracket rises to the outside of the inner box through the skylight, place the humidity sensor to be tested in the test bracket, and connect it to the acquisition and recording equipment.

[0046] (2) Set the test temperature so that the temperature of the inner and outer boxes reaches the target value and stabilizes.

[0047] (3) Set the target humidity of the outer box and the inner box, that is, the humidity step condition, return the test bracket to the inner box, and seal the skylight with the sealing cover, so that the inner box is in a sealed state.

[0048] (4) After the temperature and humidity of the inner and outer boxes are stabilized, the test bracket rises to the outside...

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Abstract

The invention relates to a humidity sensor response and recovery time measuring device and method. The measuring device includes an outer box body, an inner box body, a humidity generating device and a humidity compensation device. The inner box body is provided with a drive assembly and a test bracket. The inner box body There is a skylight on the side wall, and the driving component drives the test bracket to enter and exit the inner box and the outer box through the skylight; the humidity generating device is respectively connected with the inner box and the outer box through the pipeline, and a solenoid valve for controlling the switch is set on the pipeline. The humidity compensation device outputs the modulated PWM through the PID algorithm with humidity compensation to adjust the switching frequency of the solenoid valve. The humidity compensation device performs real-time compensation control on the humidity of the inner and outer boxes when the test bracket enters and exits the inner and outer boxes. ; In the measurement method, after the above-mentioned device is used to complete the measurement, the response time compensation formula is also combined to obtain an idealized response and recovery time.

Description

technical field [0001] The invention relates to the technical field of sensor detection equipment, in particular to a humidity sensor response and recovery time measurement device and method. Background technique [0002] The humidity sensor is a detection device that converts environmental humidity information into electrical signals based on sensitive components. It is widely used in humidity monitoring in industrial production, agricultural planting, medical monitoring, food storage and other links. With the rapid development of industries such as the Internet of Things, humidity sensors are one of the most in-demand underlying sensing components, and the global annual consumption is increasing year by year. Response and recovery time is an important index parameter of the humidity sensor. In some special application fields, such as real-time monitoring of breathing in medical equipment, the detected humidity usually changes rapidly, and the response and recovery time of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
CPCG01N33/0062G01N33/007
Inventor 梁峻阁黄宜明丁书聪顾晓峰
Owner JIANGNAN UNIV