Calibration measuring system and measuring method of dynamic response characteristic of humidity sensing element
A humidity sensing and measurement system technology, applied in the direction of measuring heat, measuring devices, thermometer testing/calibration, etc., can solve the problems of low accuracy, long response time, cumbersome operation, etc., and achieve accurate results, fast switching, and measurement Simple operation effect
Active Publication Date: 2011-01-19
LANZHOU JIAOTONG UNIV
View PDF4 Cites 21 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Due to the lack of research on the dynamic response characteristics of humidity sensors (components) and their calibration measurement devices in related fields at home and abroad, and the difficulty in realizing fast switching between different humidity levels, the response time of humidity sensor (components) components is generally long and dynamic The development of calibration measurement devices for response characteristics is slow, and it is far from meeting the calibration measurement requirements for fast response humidity sensors (components).
The humidity sensor (component) dynamic response calibration equipment produced abroad is very expensive; the domestic national standard recommends the use of manual operation for calibration measurement, which is cumbersome to operate and the accuracy is not high
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] Such as figure 1 As shown, the structure of the calibration measurement system of the present invention includes a constant temperature water bath box 7 with a temperature control accuracy higher than 0.2°C, a temperature and power control box 3, a computer 9 and a digital bridge 10, and the computer 9 is connected to the temperature and power control box respectively. 3 is connected with the digital bridge 10, and the computer 9 is used to control the temperature in the constant temperature water bath box 7. Two sets of electric heaters 5 are arranged side by side in the constant temperature water bath box 7, and a high-low humidity generator is arranged between the two electric heaters 5, and a DS18B20 type temperature controller with an accuracy higher than 0.5°C is also installed in the constant temperature water bath box 7. The s...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a calibration measuring system and a measuring method of the dynamic response characteristic of a humidity sensing element, wherein the measuring system comprises a thermostatic water bath box body, a temperature and power supply control box, a computer and a digital bridge, wherein the computer is respectively connected with the temperature and power supply control box and the digital bridge; a heating device, a high-low humidity generator and a temperature sensor are arranged in the thermostatic water bath box body; and the temperature and power supply control box is respectively electrically connected with the humidity generator, the heating device and the temperature sensor. The measuring method comprises the following steps: measuring the static capacitance values of the humidity sensing element under different humidity conditions, and computing the capacitance values corresponding to different percentage amplitude values; and measuring the dynamic capacitance values of the humidity sensing element in a humidity switching process, comparing the dynamic capacitance values with the capacitance values corresponding to the different percentage amplitude values, and obtaining the dynamic response times under different humidity change amplitude values. The calibration measuring system of the invention can realize quick switching of different humidity environments, the switching time is 250-300ms, the operation is simple, and the result is accurate.
Description
technical field [0001] The invention belongs to the technical field of measuring equipment, and relates to a calibration device for a humidity sensing element, in particular to a calibration measurement system for the dynamic response characteristic of a humidity sensing element, and the invention also relates to using the measurement system to calibrate the dynamic response characteristic of a humidity sensing element Methods. Background technique [0002] Transportation, medical and health care, logistics warehousing, industrial and agricultural production, construction environment and other fields require humidity sensors (components) to have excellent characteristics. Dynamic response characteristics are one of the basic characteristics of humidity sensors (components), which means that at a certain temperature, When the humidity has a certain amount of step, the time required for the electrical parameter of the humidity sensor to reach the specified ratio of the humidit...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01K15/00
Inventor 周文和王良璧胡万林常立民王良成高全福
Owner LANZHOU JIAOTONG UNIV