A wind speed sensor and detection method for cotton foreign fiber detection

Abstract

The invention discloses a wind speed sensor and a detection method for detecting cotton heterosexual fibers. A central bearing is connected to a wind direction cup device through sliding balls, and several wind direction cups are horizontally distributed on the outside of the wind direction cup device along the circumferential direction; the middle section of the center bearing is coaxial Fixed gear, the top of each tooth of the gear is fixedly pasted with a magnetic steel sheet; there is an inductive switch element on the front end of the Hall sensor, the inductive switch element is located near the magnetic steel sheet and the two are on the same level, and the Hall sensor is connected internally The photoelectric coupler and the wind cup rotate with the wind to drive the central bearing and the gear to rotate synchronously, and the Hall effect is generated between the magnetic steel sheet and the Hall sensor switch; then the frequency of the pulse signal is measured by the multi-cycle synchronization method through the single-chip microcomputer, The pulse signal is proportional to the signal of the speed of the wind cup, so that the output signal can be measured with equal precision in the whole frequency range, the measurement error is reduced, and the measurement accuracy of the frequency of the pulse signal is improved.

Description

technical field [0001] The invention relates to a wind speed sensor used for modern industrial detection, in particular to an wind speed sensor which can be accurately measured in the identification and detection process of cotton foreign fibers. Background technique [0002] Foreign fibers in cotton refer to non-cotton fibers and non-natural fibers that are mixed into cotton and have a serious impact on the quality of cotton and its products, such as chemical fibers, hair, silk, hemp, plastic films and dyeing threads. Although the content of foreign fibers in lint is small, it has a serious impact on the quality of textiles. Once mixed into the textile, it will not only affect the spinning ability, but also cause various color spots on the fabric after dyeing, which seriously affects the appearance quality of the fabric. At present, for the processing of heterosexual fibers, two methods are adopted uniformly at home and abroad. One is optical detection, which mainly uses in...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of large errors and low measurement accuracy in the detection of cotton foreign fibers in the prior art, and propose a magnetoelectric wind speed sensor with simple structure, convenient operation and high measurement accuracy for cotton foreign fiber detection. Sensor; the present invention also proposes the method that adopts this wind speed sensor to detect simultaneously

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