MULTI-TIER LIMIT-ANGLE PROTECTION DEVICE

摘要

A multi-tier limit-angle protection device detects a rotation angle about a rotation axis of a driving apparatus to thereby control the operation of a driving motor of the driving apparatus. The multi-tier limit-angle protection device includes a first-axis potentiometer for generating a first-axis sensing signal, a first-axis limit-angle detecting module for generating a first-axis confirming signal, and a controller. The controller effectuates a first tier protection mechanism by determining whether a limit angle of the rotation axis is exceeded according to the first-axis sensing signal, effectuates a second tier protection mechanism by determining whether the first-axis potentiometer is operating well according to a first-axis confirming signal, and effectuates a third tier protection mechanism through its control over the driving motor. The multi-tier limit-angle protection device features integration of software and hardware to thereby preclude mechanism complexity and provide a multi-tier limit-angle protection mechanism.

主权项

1. A multi-tier limit-angle protection device, adapted to detect a rotation angle about a rotation axis of a driving apparatus to thereby control operation of a driving motor of the driving apparatus, the multi-tier limit-angle protection device comprising:
a first-axis potentiometer comprising two magnetic sensing elements and a first magnetic block, with the two magnetic sensing elements spaced apart by a first predefined angle centered at a first axis of the driving apparatus, wherein a direction of magnetization of the first magnetic block is perpendicular to the first axis so as for a first-axis sensing signal to be generated in accordance with an output of a variation in a strength of magnetic field induction of the first magnetic block relative to the first-axis potentiometer; a first-axis limit-angle detecting module comprising two magnetic sensing elements, two switch circuits, and three second magnetic blocks, with the second magnetic blocks disposed at positive and negative limit angles and the zero point of the first-axis rotation angle of the driving apparatus, respectively, wherein the two magnetic sensing elements connected to the digital switch circuits are disposed at the positive and negative limit angles, respectively, so as to output a plurality of first-axis confirming signals in accordance with magnetic field induction of the second magnetic blocks; and a controller connected to the first-axis potentiometer, the first-axis limit-angle detecting module, and the driving apparatus and adapted to receive the first-axis sensing signal so as to determine a rotation angle about the first axis of the driving apparatus, such that operation of a first-axis driving motor of the driving apparatus stops as soon as the rotation angle about the first axis exceeds a limit angle, wherein the controller receives the first-axis confirming signals, such that the rotation angle about the first axis is determined, and a negative determination causes the first-axis driving motor of the driving apparatus to stop operating, wherein, from the perspective of the magnetic sensing element-facing sides of the second magnetic blocks, one of the second magnetic blocks is disposed at the zero point of the rotation angle, whereas the other two second magnetic blocks are disposed at the positive and negative limit-angles of the rotation angle, respectively, and have opposite magnetic poles facing the magnetic sensing elements.