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Heating and temperature measuring integrated wind speed and wind direction sensor

A wind speed, wind direction, sensor technology, applied in the direction of speed/acceleration/shock measurement, thermometers and instruments with directly sensitive electrical/magnetic components, etc., can solve the problem of limiting the range of thermal wind speed and direction sensors, and achieve fewer chips. The effect of occupying area, expanding range, and improving sensitivity

Active Publication Date: 2021-07-09
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

However, the inherent characteristic that the temperature difference signal gradually saturates as the wind speed increases (that is, the sensitivity gradually decreases and tends to zero) limits the range of the thermal wind speed and direction sensor.

Method used

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  • Heating and temperature measuring integrated wind speed and wind direction sensor
  • Heating and temperature measuring integrated wind speed and wind direction sensor
  • Heating and temperature measuring integrated wind speed and wind direction sensor

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Embodiment Construction

[0016] A wind speed and direction sensor integrated with heating and temperature measurement of the present invention includes a Wheatstone bridge and a constant temperature difference closed-loop control loop for powering the Wheatstone bridge. The Wheatstone bridge includes a first Wheatstone bridge and a second Wheatstone bridge connected in parallel. The first Wheatstone bridge and the second Wheatstone bridge have common voltage input terminals Va and Vb, and the output terminals of the constant temperature difference closed-loop control loop are respectively connected to the voltage input terminals Va and Vb of the Wheatstone bridge. The constant temperature difference closed-loop control loop provides voltage for the Wheatstone bridge, and it increases with the increase of wind speed, thereby improving the sensitivity of the sensor at high wind speed.

[0017] The Wheatstone bridge includes four thermistors located on the chip substrate 100 and four identical external r...

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Abstract

The invention provides a heating and temperature measuring integrated wind speed and wind direction sensor, firstly, four or eight centrosymmetric thermistors are prepared on the surface of a chip through the micromachining technology, and the thermistors serve as heating elements to keep the average temperature of the chip higher than the constant value of the environment temperature, and also serve as temperature measuring elements to sense the micro temperature difference caused by fluid on the surface of the chip. The thermistors form a Wheatstone bridge and are powered by a constant-temperature-difference closed-loop control loop, and the circuit can provide voltage which is increased along with increase of wind speed. Compared with an open-loop Wheatstone bridge, the closed-loop Wheatstone bridge provided by the invention has larger output, namely higher sensitivity, at a high wind speed, so that the measurement range of the sensor is expanded.

Description

technical field [0001] The invention relates to the technical field of wind speed and direction sensors, in particular to a wind speed and direction sensor integrating heating and temperature measurement. Background technique [0002] As a ubiquitous natural phenomenon, wind has a very important impact on human production and life. Accurate wind speed and wind direction measurement provides information reference for agricultural production, port transportation, wind power generation, intelligent buildings and other fields, and provides early warning for environmental monitoring and meteorological disasters. Compared with the early use of wind cups and vanes to measure wind speed and direction, thermal wind speed and direction sensors based on micromachining have the advantages of small size, low cost, and good consistency. This type of sensor includes at least one central heating element and four symmetrically distributed temperature measuring elements. The heating element ...

Claims

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Application Information

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IPC IPC(8): G01K7/24G01P5/00G01P13/02
CPCG01K7/24G01P5/00G01P13/02
Inventor 王振军秦明易真翔黄庆安
Owner SOUTHEAST UNIV
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