Rotation detection device of motor

Abstract

The invention discloses a rotation detection device of a motor, wherein the motor is a direct-current motor, and the device comprises a route detection module for detecting rotation of the direct-current motor. The route detection module is connected onto a control circuit board. The rotation detection device is characterized in that the detection circuit board comprises an induced electromotive force detection and signal processing module for detecting and processing induced electromotive forces at two ends of the direct-current motor and a control unit for controlling power on or power off of the route detection module according to signals of the induced electromotive force detection and signal processing module. The control unit comprises a single chip microcomputer. When an operator pulls a load with hands to drive the direct-current motor to rotate, the induced electromotive force detection and signal processing module detects that the induced electromotive forces are generated at two ends of the direct-current motor, and the single chip microcomputer controls the route detection module to be powered on; and when the operator stops pulling the load with hands and the direct-current motor stops rotating, the induced electromotive force detection and signal processing module detects that no induced electromotive force is generated at two ends of the direct-current motor, and the single chip microcomputer controls the route detection module to be powered off. The rotation detection device further comprises batteries for supplying power to the direct-current motor and the control unit.

Description

technical field [0001] The invention relates to a motor, in particular to a low power consumption motor rotation detection device. Background technique [0002] A commonly used motor is provided with a sensor for detecting the rotation of the motor, such as a Hall sensor, a photoelectric sensor or an encoder. When the motor rotates, the sensor sends a pulse signal to the controller, and the controller judges the number of rotations of the motor according to the pulse signal, that is, the stroke of the motor, so as to obtain the position of the load driven by the motor. [0003] For example, the Chinese patent with the authorized announcement number CN201319145Y discloses a stroke controller of a tubular motor. When the motor rotates, the transmission gear drives the driven gear, and the driven gear drives the driven shaft to rotate, and the magnet at the right end of the driven shaft follows Rotate together, the sensor directly below the magnet is connected to the circuit b...

AI Technical Summary

Problems solved by technology

[0004] The above commonly used sensors for detecting the rotation of the motor usually keep the detection state when the motor is powered on or off, so it must be powered on all the time. For motors that do not use mains power supply, the sensor will occupy a large proportion Power consumption, which is not conducive to the control of power consumption, making it unsuitable for motor products that require strict control of power consumption

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