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Thermistor type air velocity transducer with temperature compensation

A wind speed sensor and thermistor technology, applied in the field of sensors, can solve the problems of complex signal processing circuit, weak output signal, limited rotation quality, etc., and achieve the effect of simple back-end processing circuit, small measurement inertia, simple and reliable structure

Inactive Publication Date: 2013-07-24
BEIJING RES INST OF TELEMETRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wind cup wind speed sensor and the propeller wind speed sensor have limited rotating mass, the sensor has a large inertia, and the rotating part destroys the flow field, so it cannot measure low wind speed, the error is large, and the service life is limited
Because the diameter of the hot wire wind speed sensor is only about 0.02mm and the length is only about 2mm, it has the disadvantages of difficult process, weak output signal, complex back-end signal processing circuit, and easy damage structure

Method used

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  • Thermistor type air velocity transducer with temperature compensation
  • Thermistor type air velocity transducer with temperature compensation
  • Thermistor type air velocity transducer with temperature compensation

Examples

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Embodiment

[0019] A thermistor-type wind speed sensor with temperature compensation, such as figure 1 As shown, the sensor includes a self-heating thermistor 1, a temperature compensation thermistor 2, a thermal insulation pillar 3, a metal tube 4, glue 5, a wire A6 and a wire B8; the thermal insulation pillar 3 has a through hole 7;

[0020] Self-heating thermistor 1 is a MF51 type semiconductor thermistor, and its resistance at 0°C is 2KΩ;

[0021] The temperature compensation thermistor 2 is a semiconductor thermistor of type MF51, and its resistance at 0°C is 25KΩ;

[0022] The heat-insulating pillar 3 is made of polyamide oxide material, which has high structural strength and can withstand high temperatures of 400°C;

[0023] Adhesive 5 is CH31 epoxy adhesive, which has high bonding strength and can withstand high temperature of 220°C;

[0024] Use glue 5 to fix the self-heating thermistor 1 and temperature compensation thermistor 2 in the heat insulation support 3, the sensitive ...

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Abstract

The invention relates to a thermistor type air velocity transducer with temperature compensation. The thermistor type air velocity transducer is used for air velocity measurement, is also used for flow velocity measurement of other gases and insulating fluids and belongs to the technical field of transducers. The thermistor type air velocity transducer with temperature compensation comprises a self-heating thermistor, a temperature-compensation thermistor, an insulating pillar, a metal tube and conducting wires. The thermistor type air velocity transducer with temperature compensation is not provided with a mechanical movement mechanism, causes little damage to a flow field, has small measurement inertia, can measure low air velocity, has high precision, a long service life, a high output signal, a simple back-end processing circuit, a reliable structure, a small size and a light weight; and the thermistor type air velocity transducer with temperature compensation is not only used for the air velocity measurement, but also used for the flow velocity measurement of other gases and insulating fluids.

Description

technical field [0001] The invention relates to a temperature-compensated thermistor-type wind speed sensor, which is used for wind speed measurement, and can also be used for flow speed measurement of other gases and insulating night bodies, and belongs to the technical field of sensors. Background technique [0002] There are mainly two types of wind speed measurement sensors currently used, one is the wind cup wind speed sensor with rotating parts, the propeller wind speed sensor, and the other is the hot wire wind speed sensor. The wind cup wind speed sensor and the propeller wind speed sensor have limited rotating mass, the sensor has a large inertia, and the rotating part destroys the flow field, so it cannot measure low wind speed, the error is large, and the service life is limited. Because the diameter of the hot wire wind speed sensor is only about 0.02mm and the length is only about 2mm, it has the disadvantages of difficult process, weak output signal, complex ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/12
Inventor 杨显涛陈青松郑帮林张荣华王海清
Owner BEIJING RES INST OF TELEMETRY
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