Gimbal Motor Hall Sensor Non-Contact Position Detection
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Solution Overview
Problem
Conventional sensors in gimbals, such as encoders and potentiometers, exhibit high frictional resistance and poor electrical contact, affecting the stability and control of image capturing devices.
Innovation Solution
The implementation of a non-contact Hall angular displacement sensor, spaced from a magnet by an electrical connecting device, to detect the positional relationship between the stator and rotor, reducing frictional resistance and improving control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an encoder is used as the sensor, then measurement precision is improved, but device volume increases, cost increases, and frictional resistance increases
Solution Approach 1:
The patent replaces the mechanical contact-type encoder with a non-contact Hall angular displacement sensor that detects rotor position through magnetic field sensing. This substitution eliminates mechanical friction, reduces sensor volume, and lowers cost while maintaining high measurement precision for rotor-stator relative position detection.
Solution Approach 2:
The patent introduces a magnet as an intermediary element fixed on the rotor, which works with the Hall sensor to detect angular displacement. This intermediary enables non-contact position sensing, avoiding the need for direct mechanical contact between sensor and rotor components.
2Device complexity
If a potentiometer is used as the sensor, then device complexity is reduced, but measurement precision deteriorates and frictional resistance increases
Solution Approach 1:
The patent replaces the mechanical potentiometer with a non-contact Hall angular displacement sensor system. This substitution eliminates the sliding contact mechanism of potentiometers, thereby reducing frictional resistance while achieving superior measurement precision through magnetic field-based angular detection.
3Ease of manufacture
If contact type sensors are used, then manufacturing is simplified, but frictional resistance increases and electrical contact deteriorates
Solution Approach 1:
The patent replaces contact-type sensors with a non-contact Hall sensor system that detects rotor position through magnetic fields. This eliminates sliding contacts and brush wear, significantly improving electrical contact reliability and reducing frictional resistance while maintaining ease of manufacture through standardized sensor mounting on the stator.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the stability and responsiveness of the gimbal by minimizing frictional resistance and maintaining precise control of the image capturing device's attitude, enabling smooth and stable multi-angle image capturing.
Implementation Method 1
a Hall angular displacement sensor fixed on the electrical connecting device and arranged opposite to the magnet
Data Source
AI summary
A method includes using a Hall angular displacement sensor to detect a magnetic field strength generated by a magnet disposed on a first end of a rotating shaft of a motor assembly of a gimbal. The sensor is disposed on a side of an electrical connecting device in a first rotating member of the gimbal that faces away from the magnet. The method further includes determining a rotational angle of a rotor of the motor assembly with respect to a stator of the motor assembly based on the magnetic field strength. The stator is coupled to the first rotating member. The rotor is coupled to a second rotating member of the gimbal and disposed on a second end of the rotating shaft. The method also includes determining a positional relationship between the first rotating member and the second rotating member based on the rotational angle.