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Patent Searching and Data


Title:
ZERO CALIBRATION METHOD FOR GIMBAL AND GIMBAL
Document Type and Number:
WIPO Patent Application WO/2020/237493
Kind Code:
A1
Abstract:
A zero calibration method for a gimbal and a gimbal, the gimbal comprising an accelerometer (5) that is used for detecting the posture of a load mounted on the gimbal, and the zero calibration method for a gimbal comprising: when a gimbal is in a specific state, acquiring the current posture of the gimbal on the basis of an accelerometer (5); determining the offset of a pitch axis joint angle and/or a roll axis joint angle of the gimbal according to the current posture of the gimbal; and determining a pitch axis zero joint angle and/or a roll axis zero joint angle of the gimbal according to the offset of the pitch axis joint angle and/or the roll axis joint angle of the gimbal. The ground gravity direction detected by the accelerometer is used to estimate the offset of the pitch axis joint angle and/or the roll axis joint angle of the gimbal, and compensate for the deviation of a joint angle of a corresponding axis; the offset estimated by using said means has higher accuracy, thereby improving the accuracy of the zero calibration of a joint angle, and preventing the roll axis of the gimbal from tilting, while also solving the problem in which the zero calibration of a gimbal overly relies on the structural accuracy of a fixture.

Inventors:
XIE WENLIN (CN)
SU TIE (CN)
Application Number:
PCT/CN2019/088731
Publication Date:
December 03, 2020
Filing Date:
May 28, 2019
Export Citation:
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Assignee:
SZ DJI TECHNOLOGY CO LTD (CN)
International Classes:
G05D1/08; G05D1/10
Foreign References:
CN108778932A2018-11-09
CN108873946A2018-11-23
CN108513651A2018-09-07
US10132932B12018-11-20
CN107463187A2017-12-12
JP5569681B22014-08-13
CN103659806A2014-03-26
Attorney, Agent or Firm:
BEIJING BESTIPR INTELLECTUAL PROPERTY LAW CORPORATION (CN)
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