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Omni-directional wind speed sensor based on NTC thermistor

A technology of wind speed sensor and thermistor, which is applied in the direction of measuring fluid velocity by using thermal variables, can solve the problems of low signal, high power consumption, and slow response speed, and achieve the effect of fast response, low power consumption, and sensitive capture

Inactive Publication Date: 2017-01-04
BEIJING CENTURY JIANTONG ENVIRONMENT TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, wind speed sensors generally use PT series platinum resistors as heating and wind sensing probes, which have the disadvantages of large power consumption, low signal and slow response speed

Method used

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  • Omni-directional wind speed sensor based on NTC thermistor
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  • Omni-directional wind speed sensor based on NTC thermistor

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] see Figure 1-5 , the present invention provides a technical solution: including a top cover 1, a cylindrical NTC thermistor 2, a packaged sensor base 3, a connection assembly 4, a circuit board 5, a connecting arm 6, an insulating cap 7, a cable 8, and a top cover One end of 1 is provided with a threaded hole 9, and one end of the connection assembly 4 close to the top cover 1 is provided with an external thread 10 matching the threaded hole 9, and the...

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Abstract

The invention discloses an omni-directional wind speed sensor based on a NTC thermistor. The omni-directional wind speed sensor based on the NTC thermistor comprises a top hood, a cylindrical NTC thermistor, a packaging sensor base, a connecting assembly, a circuit board, a connecting arm, an insulating cap and a cable, wherein a threaded hole is formed in one end of the top hood; outer threads, which are matched with the threaded hole, are arranged at one end, which is close to the top hood, of the connecting assembly; the top hood is connected with the connecting assembly through the outer threads and the threaded hole; and a cavity structure is formed in the middle of the connecting assembly. An end of the cylindrical NTC thermistor is protected by the top hood, meanwhile, air motion in various directions is not affected, the cylindrical NTC thermistor with resistance of 2K ohm is used as a wind sensing probe, large change of a resistance value is realized by low power consumption, so that weak wind speed can be responded quickly, and by a high-precision constant-current source and the combination of an analog amplifying circuit and a high-speed digital acquiring circuit, the weak wind speed can be sensitively captured.

Description

technical field [0001] The invention relates to the technical field of wind speed detection, in particular to an omnidirectional wind speed sensor based on an NTC thermistor. Background technique [0002] In HVAC, especially in the thermal comfort research of indoor thermal environments, it is often necessary to test low wind speeds with large randomness in wind direction, such as air disturbance caused by natural convection. This requires sensors with high sensitivity and short response time for accurate testing. The international standard ISO7710 proposes that the acquisition period should not be greater than 0.2 seconds, and the sensitivity should not be lower than 0.05m / s. In the prior art, wind speed sensors generally use PT series platinum resistors as heating and wind sensing probes, which have the disadvantages of large power consumption, low signal and slow response speed. Contents of the invention [0003] The purpose of the present invention is to provide an o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/12
CPCG01P5/12
Inventor 任跃马勇张信平
Owner BEIJING CENTURY JIANTONG ENVIRONMENT TECH
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