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AssigneeAutomotive Research & Testing Center
InventorsChau-Chih Yu, Tsung-Hua Hsu, Jin-Yan Hsu, Chih-Jung Yeh
Estimating the term…
A contactless detection apparatus has a first magnet ring, a second magnet ring, a first magnetic sensor, a second magnetic sensor and a controller. The two magnet rings are respectively mounted on two ends of a torsion shaft. When the torsion shaft rotates, the controller detects the magnetic fields of the two magnet rings through the two magnetic sensors. The controller calculates a twisting torque exerted on the torsion shaft and a rotational angle of the torsion shaft according to the detected magnetic fields at the same time. The detection apparatus of the invention has simple structure. The magnetic fields of both magnet rings do not interfere with each other, such that the detection result of the invention is accurate.
A method for detecting a rotation direction, comprising the steps of:
A contactless detection apparatus for detecting a rotation direction, the detection apparatus comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
No references of this kind are recorded.
Indicating direction only, e.g. by weather vane: indicating positive or negative direction of a linear movement or clockwise or anti-clockwise…
Measuring arrangements characterised by the use of electric or magnetic techniques: for measuring angles or tapers; for testing the alignment of axes
Influencing characteristics of pulses or pulse trains; generating pulses or pulse trains: interpolation using high frequency signals
Using pulse code: pulse stream
About 6 years 11 months of term left · ends 20 Sep 2033 (estimated)
1. Field of the Invention
The present invention relates to a detection apparatus, and more particularly to a contactless detection apparatus and method for detecting a rotation direction.
2. Description of Related Art
FIG. 1 is an operating view of a shaft sustaining a forward torque and a backward torque;
FIG. 2 is a basic operational view of the present invention;
FIG. 3 is a wave diagram of a magnetic field detected by the first magnetic sensor;
For convenience of description, a torsion shaft 11 of a bike is illustrated in FIG. 1. The torsion shaft 11 has a first end and a second end respectively connected to a first crank and a second crank, wherein the second end of the torsion shaft 11 is also connected to a back wheel through a gear and a chain. When an exerciser steps on the first crank to exert a forward force (Fz) on the torsion shaft 11, the first end of the torsion shaft 11 sustains a forward torque (Tz). Meanwhile, the chain exerts a backward force (Fc) on the second end of the torsion shaft 11 based on a traction force between the back wheel and the ground, such that the second end of the torsion shaft 11 sustains a backward torque (Tc). By an interaction of the forward torque (Tz) and the backward torque (Tc), a twist angle (Δψ) between the first end and the second end of the torsion shaft 11 occurs. By measuring the twist angle (Δψ), a twisting torque exerted on the torsion shaft 11 can be calculated.
The detection apparatus of the present invention can be mounted on a vehicle or a bike. With reference to FIGS. 2 and 5, a first embodiment of the present invention is disclosed. The detection apparatus of this invention is adapted to be mounted on a shaft unit 20 of the vehicle or the bike. The shaft unit 20 has a first portion 21 and a second portion 22 opposite to the first portion 21.
The detection apparatus of this invention mainly comprises a first magnet ring 231, a second magnet ring 232, a first magnetic sensor 241, a second magnetic sensor 242 and a controller 30.