Controllable variable-temperature simulation loading system for sublayer baffle-type fluid wall shear stress sensor
A diaphragm type, sensor technology, applied in the direction of measuring fluid pressure, instruments, measuring devices, etc., can solve the problem of difficult temperature characteristics research work, and achieve the effects of controllable and adjustable repeatability, strong practicability, and simple operation.
Active Publication Date: 2015-09-09
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
[0005] In order to overcome the problem that the research work on the temperature characteristics of the bottom baffle type fluid wall shear stress sensor is difficult to carry out, the present invention proposes a controllable variable temperature simulation loading system for the bottom baffle type fluid wall shear stress sensor, which can be used for the full range of experimental research The relationship between the electrical quantity output and the temperature change of the bottom baffle type fluid wall shear stress sensor in a large temperature range provides great convenience
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[0016] The controllable variable temperature analog loading system of the bottom diaphragm type fluid wall shear stress sensor includes a micro-displacement device, a bottom diaphragm type fluid wall shear stress sensor, a precision thermostat and a data acquisition system; the micro displacement device is a bottom diaphragm type fluid wall The sensitive cantilever beam structure of the wall shear stress sensor provides precise and controllable displacement loading; the micro-displacement device and the bottom diaphragm type fluid wall shear stress sensor are all located inside the precision thermostat, which is used to study the electrical output of the sensor and The temperature change relationship provides an adjustable and controllable temperature environment; the data acquisition system is located outside the precision incubator, and its function is to measure and record the electrical quantity output of the bottom baffle type fluid wall shear stress sensor.
[0017] The t...
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The invention discloses a controllable variable-temperature simulation loading system for a sublayer baffle-type fluid wall shear stress sensor, which comprises a micro displacement device, a sublayer baffle-type fluid wall shear stress sensor, a precious constant temperature box and a data acquisition system, wherein the micro displacement device provides precious and controllable displacement loading for a sensitive cantilever beam structure of the sublayer baffle-type fluid wall shear stress sensor; the precious constant temperature box provides an adjustable and controllable temperature environment for researching a relationship between electrical quantity output of the sensor and temperature changes; and the data acquisition system measures and records the electrical quantity output of the sublayer baffle-type fluid wall shear stress sensor, data analysis is finally carried out, and sensor temperature feature research is realized. According to the controllable variable-temperature simulation loading system for the sublayer baffle-type fluid wall shear stress sensor of the invention, the problem that the research on temperature features of the sublayer baffle-type fluid wall shear stress sensor is hard to carry out can be overcome, and great convenience is provided for researching the relationship between electrical quantity output of the sublayer baffle-type fluid wall shear stress sensor in a full-range large temperature scope and temperature changes through experiments.
Description
Technical field: [0001] The invention relates to a controllable temperature-variable simulation loading system for a bottom-layer baffle type fluid wall shear stress sensor. Background technique: [0002] The flow parameters near the wall, especially the wall shear stress, are important parameters for studying and judging the shape of the flow field and the state of the boundary layer. Researchers at home and abroad have invested a lot of energy in the research and development of wall shear stress sensors. Among them, the piezoresistive wall shear stress sensor represented by the bottom diaphragm fluid wall shear stress sensor is the hotspot of the development of shear stress sensors today. [0003] The working performance of the bottom diaphragm type fluid wall shear stress sensor is greatly affected by the fluctuation of external temperature. To improve the performance of the sensor, various temperature compensation measures need to be taken. Therefore, it is very importan...
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IPC IPC(8): G01L27/00
Inventor 马炳和马骋宇邓进军
Owner NORTHWESTERN POLYTECHNICAL UNIV