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 foreign fibers. The central bearing is connected to the wind direction cup device through sliding balls. Several wind direction cups are evenly distributed in the circumferential direction outside the wind direction cup device; the middle section of the central bearing is coaxial. The gear is fixed, and the top of each saw 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. The Hall sensor is internally connected The photoelectric coupler and the wind direction cup rotate with the wind to drive the central bearing and 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 using the multi-cycle synchronization method through the microcontroller. The pulse signal is proportional to the signal of the wind direction cup rotational speed, achieving equal-accuracy measurement of the output signal in the entire frequency range, reducing the measurement error, and improving the measurement accuracy of the pulse signal frequency.

Description

Technical field

[0001] The invention relates to a wind speed sensor used for modern industrial detection, and in particular, to a wind speed sensor that can accurately measure when used 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, linen, plastic films and dyed threads. Although the content of foreign fiber 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 to appear on the cloth after dyeing, seriously affecting the appearance quality of the cloth. At present, there are two methods used at home and abroad to deal with foreign fibers. One is optical detection, which mainly uses industrial hi...

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