A wireless torque sensor for electric bicycle

Abstract

The invention discloses a wireless torque sensor for an electric bicycle, which comprises a vehicle frame, a center shaft arranged on the vehicle frame, a crank, a chainring, a rotating part provided with strain spokes, a stationary part, and an electromagnetic power generator arranged in the rotating part. Coils, permanent magnets set in stationary parts, circuit protection devices connected to electromagnetic generator coils, power supplies connected to circuit protection devices, strain gauge bridges, signal processing devices I, signal processing devices II, RF transmitters, RF receivers devices, display devices and processors. The technical problem solved by the invention is to solve the connection fault of the traditional electric vehicle. The torque sensor disclosed by the invention has the advantages of simple structure, convenient signal transmission, low interference and high signal accuracy, which is beneficial to the operation and control of electric bicycles, reduces the error rate of signals, and reduces the occurrence probability of false signals.

Description

technical field [0001] The invention relates to a torque sensor, in particular to a wireless torque sensor for an electric bicycle. Background technique [0002] Because of its light, labor-saving and pollution-free characteristics, electric bicycles are increasingly accepted by the society and vigorously promoted. Generally, there are two types of speed control devices for electric bicycles. One is to use the mechanical rotation of the handle to realize it, and the other is to use a speed sensor to control the output power of the motor. The control method using the speed sensor is the so-called smart electric bicycle. The characteristic of this type of bicycle is that it is easy to ride on flat ground, but it is very laborious to go uphill. The electric bicycle using torque and speed sensors is just the opposite. When riding on flat ground, the output power is very small, which makes people feel that riding is easy and saves power. It is more labor-saving. At present, th...

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Problems solved by technology

At present, the power-assisted opening and closing of the electric vehicle field, the generation of signals such as the stress sheet bridge acquisition of the torque sensor are all through the joint action of the rotating part and the stationary part, so the problem of the signal lead-out line is caused. The current electric vehicle industry uses friction reeds. The way to lead out the signal and the power supply of the rotating parts, due to the wear, oxidation, burning of the friction reed contact, the unreliability of the mechanical contact jump, etc., will cause the signal loss and the false signal generated by the contact jump; at the same time, the signal line is used to lead out When the signal line quick connector is loose, the thread head falls off, the signal line is damaged and other common faults

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