Rotation angle detection device and method, and electronic equipment

Abstract

An embodiment of the invention provides a rotation angle detection device, a rotation angle detection method, and electronic equipment. According to the rotation angle detection device and the rotation angle detection method, a Helmholtz coil composed of a first coil and a second coil is used as a magnetic field excitation source; the first coil and the second coil are oppositely arranged in parallel on one of a first structural member and a second structural member; the magnetic sensor is arranged on the other one of the first structural member and the second structural member; the magnetic sensor is positioned between the first coil and the second coil; when the first structural member rotates relative to the second structural member along a rotation axis; magnetic field intensity component on a detection coordinate axis of a magnetic sensor is changed accordingly; therefore, the magnetic field information is collected by means of the magnetic sensor, the rotation angle is determinedbased on the magnetic field information, the magnitude of currents introduced into the first coil and the second coil are controllable, thereby avoiding the problem that the calibration frequency needs to be increased due to degradation of the permanent magnet over time, and reducing the calibration frequency of the magnetic field excitation source on the premise of ensuring the detection precision of the rotation angle.

Description

technical field [0001] The invention relates to the technical field of mechanical structures, in particular to a rotation angle detection device, method and electronic equipment. Background technique [0002] At present, with the application of mechanical structures with rotary motion (that is, rotating mechanisms) more and more widely, in order to realize the precise control of the operating state of the rotating mechanism during the normal operation of the rotating mechanism, it is necessary to adjust the rotation angle of the rotating mechanism Monitor and control the rotation angle precisely. [0003] At present, the angle detection device of the rotating mechanism is mainly: a permanent magnet of a specific shape is used as the magnetic field excitation source, and a magnetic field detection sensor is added to detect the rotation of the rotating mechanism by detecting the relative positional relationship between the permanent magnet and the magnetic field excitation sou...

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a rotation angle detection device, method and electronic equipment to solve the problems of high calibration frequency and low detection accuracy in the existing rotation mechanism angle detection device

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