Method and device for measuring speed of cotton flow channel in cotton foreign fiber detection and removal machine

Abstract

The invention discloses a method and device for measuring speed of cotton flow passage of cotton fiber detecting and rejecting machine. A detecting module is fixedly connected on the channel wall of the fiber detecting and identifying area and the fiber removing area and the channel wall of the fiber removing area; each detection module consists of bearing plate, GMR sensor, composed of sheet metal and magnetic beads; the load plate is fixedly embedded in the channel wall of the cotton flow passage and a giant magnetoresistive sensor is fixed at the center of the inner surface of the bearing plate; the outer ends of the metal sheet are fixedly connected at the middle of the inner surface of the giant magnetic resistance sensor and the inner end of the sheet extends toward the center of the cotton flow passage; a permanent magnetic bead is fixed in the middle of the inner end of the metal plate, and the position of the permanent magnetic bead is detected by using a giant magnetic resistance sensor; combining the neural network model, the the speed of cotton flow is calculated, and the accurate measurement of the speed of the cotton flow is realized.

Description

technical field [0001] The invention belongs to cotton foreign fiber detection and rejecting machine equipment, in particular to a cotton flow channel speed measuring device used on the cotton foreign fiber detection and rejecting machine. Background technique [0002] Cotton foreign fiber detection and removal machine is an important equipment in cotton production. Cotton enters the cotton flow channel of the detection and removal machine to form a cotton flow. It passes through the detection area to detect foreign fibers, then passes through the removal area to remove foreign fibers, and finally flows out the required cotton fibers. However, the cotton foreign fiber detection and rejecting machine can only remove most of the foreign fibers instead of all, and the removal rate cannot fully meet the demand. When a foreign fiber is detected in the area, a rejection command is issued, which may cause the nozzle to move in advance or lag behind, resulting in a low foreign fiber...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the existing problems in the cotton flow channel speed measurement in the existing cotton foreign fiber detection and rejection machine, and propose a cotton flow channel speed measurement method and device that can improve the removal rate of foreign fibers, and can accurately detect the cotton flow channel. The foreign fiber detection and identification area, the midpoint of the foreign fiber detection and identification area and the foreign fiber removal area, and the cotton flow velocity at the three places of the foreign fiber removal area can avoid errors caused by excessive cotton spraying at a time, especially excessive cotton flow fluctuations. remove

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