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Forward Interpolation Method for Angle Sensors and Rotary Encoders

A rotary encoder and angle sensor technology, applied in the field of angle sensor, rotary encoder, and forward interpolation, can solve the problems of not meeting the accuracy and real-time requirements, improve effective data refresh, avoid high-frequency noise, and output smooth effect

Active Publication Date: 2022-07-12
SHANGHAI MAIGEEN MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sensor sampling sensing part currently used cannot meet such high precision and real-time requirements.

Method used

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  • Forward Interpolation Method for Angle Sensors and Rotary Encoders
  • Forward Interpolation Method for Angle Sensors and Rotary Encoders

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Embodiment 1

[0091] see figure 1 , the present invention discloses a forward interpolation method of an angle sensor and a rotary encoder based on the principle of discrete rotational inertia, the method is used to realize the use of the known angle information of the object at the time to predict the object in the following period of time The angle changes within. The method includes: according to the inertia theorem of rigid body motion, it is assumed that the rigid body rotation follows the principle of uniform acceleration motion in a relatively short time (corresponding to the following step S1); Calculate to obtain the angular velocity and angular acceleration value of the predicted starting position (corresponding to the following step S2); according to the angular information, angular velocity information and angular acceleration information of the starting position, perform forward interpolation prediction calculation under the requirement of the output frequency (corresponding to...

Embodiment 2

[0124] The difference between this embodiment and the first embodiment is that, in this embodiment, the present invention discloses a forward interpolation method of an angle sensor and a rotary encoder based on the principle of discrete rotational inertia. The angle information of the object at the moment is used to predict the angle change of the object in the following period of time. The method includes: according to the inertia theorem of rigid body motion, it is assumed that the rigid body rotation follows the principle of uniform acceleration motion in a relatively short time; the calculation is performed on the basis of the angular position information obtained at the latest several sampling moments to obtain the predicted starting position. According to the angle information and angular velocity information and angular acceleration information of the starting position, the forward interpolation prediction calculation is performed under the requirement of the output fre...

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Abstract

The invention discloses a forward interpolation method of an angle sensor and a rotary encoder. Before the sampling output of the next sensor, the angle of the current mechanical structure is pre-judged; The output of the sampling sensor is used as the input condition of the interpolation algorithm; when two sampling outputs are used as the interpolation base value, the uniform acceleration motion is simplified to the uniform motion. The forward interpolation method of the angle sensor and the rotary encoder proposed by the invention effectively breaks through the limitation of the low-speed sampling induction unit, greatly improves the effective data refresh of the angle sensor and the rotary encoder, and provides the real-time angle of the rotor in time. information. This algorithm avoids the high-frequency noise caused by the error between the interpolation prediction and the actual sampling result, and makes the output smoother.

Description

technical field [0001] The invention belongs to the technical field of semiconductors, and relates to an angle sensor and a rotary encoder, in particular to a forward interpolation method of the angle sensor and the rotary encoder based on the principle of discrete rotational inertia. Background technique [0002] Angle sensors and rotary encoders are important carriers for measuring angle information during the rotation of various mechanical structures. At present, it is widely used in various fields, such as industrial equipment control automobile, smart home, intelligent multimedia equipment, Internet of Things technology, etc. [0003] Based on the current mainstream sensing elements (such as Hall sensor type, magnetoresistive sensor type, electromagnetic induction sensor type, etc.), the angle judgment method mainly obtains the current angular position of the device through the direction and strength of the magnetic field. [0004] Due to the increasing requirements fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/17
CPCG06F17/17Y02P90/02
Inventor 朱剑宇孙毅
Owner SHANGHAI MAIGEEN MICROELECTRONICS CO LTD
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