Stepper motor out-of-step compensation method and device

Abstract

The invention discloses a stepper motor out-of-step compensation method which is used to control an ultrasonic probe. The ultrasonic probe comprises a transducer and a stepper motor. The method comprises the following steps: acquiring the actual position information of the transducer; comparing the actual position information with target position information to get out-of-step data of the stepper motor; comparing the out-of-step data with a preset threshold to determine the threshold scope to which the out-of-step data belongs; and determining a compensation mode corresponding to the out-of-step data according to the threshold scope, and implementing a compensation operation corresponding to the compensation mode. According to the method, adaptive compensation is made by use of a compensation mode corresponding to the out-of-step condition of the stepper motor according to the out-of-step condition to prevent accumulative error of the relative position of the transducer, so that an image scanned by the ultrasonic probe is more accurate and does not drift. The invention further discloses a stepper motor out-of-step compensation device which has the same beneficial effect.

Description

technical field [0001] The invention relates to the technical field of ultrasonic equipment, in particular to a step motor out-of-step compensation method and device. Background technique [0002] The stepper motor is driven by the motor controller to pull the transducer to rotate. For example, the motor-driven transmission mechanism of the four-dimensional ultrasonic probe during the rotation process makes the transducer scan within a certain angle range. In order to accurately obtain the four-dimensional ultrasonic image, when the four-dimensional ultrasonic probe emits and receives ultrasonic waves, the scanning of the transducer must be precisely controlled. Angular velocity and scan angle. The stepper motor itself has no cumulative error, but due to factors such as the mechanical error of the transmission device, the motor runs for a long time, and there is a cumulative error in the relative position of the transducer. Since there is no self-correction technology, ima...

AI Technical Summary

Problems solved by technology

The stepper motor itself has no cumulative error, but due to factors such as the mechanical error of the transmission device, the motor runs for a long time, and there is a cumulative error in the relative position of the transducer

Since there is no self-correction technology, image drift may occur in long-term operation

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