Design of high precision motor driving system for circular scanning ultrasonic endoscopic imaging equipment

Haoran Deng; Baoping Bai; Xiaodong Chen; Qiang Zhao; Yanan Li; Yi Wang; Daoyin Yu

doi:10.1117/12.2034082

19 December 2013 Design of high precision motor driving system for circular scanning ultrasonic endoscopic imaging equipment

Haoran Deng, Baoping Bai, Xiaodong Chen, Qiang Zhao, Yanan Li, Yi Wang, Daoyin Yu

Author Affiliations +

Proceedings Volume 9045, 2013 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Processing Technology; 904503 (2013) https://doi.org/10.1117/12.2034082
Event: International Conference on Optical Instruments and Technology (OIT2013), 2013, Beijing, China

Abstract

This paper describes the development of a motor driving system for circular scanning ultrasonic endoscopic imaging equipment. It was designed to guarantee the motor rotating at a relatively constant speed in load fluctuation conditions, which result from the bending and twisting of the flexible shaft which connects the probe to the motor. A hardware feedback circuit based on Frequency-To-Voltage Converter LM331 and Step-Down Voltage Regulator LM2576-ADJ was designed to ensure steady rotation of motor in load fluctuation conditions, and a D/A module offered by MCU was used to regulate the real-time rotary speed. The feedback response cycle is about 20 μs according to theoretical analysis. Experimental results show that the maximum error is ±1 r/min under the normal running environment (300 ~1500 r/min) and load fluctuation conditions, which means the average instability is reduced to 0.11% as compared with that of the motor drive simply based on MCU which is 0.94%. Both theoretical analysis and experimental results indicate that the motor driving system has high accuracy, fast response, excellent reliability and good versatility and portability, and can precisely guarantee the smooth movement of load-changing PMW (Pulse Width Modulation) motor, so as to ensure the imaging quality, and can effectively improve the efficiency and accuracy of the diagnosis.

Citation Download Citation

Haoran Deng, Baoping Bai, Xiaodong Chen, Qiang Zhao, Yanan Li, Yi Wang, and Daoyin Yu "Design of high precision motor driving system for circular scanning ultrasonic endoscopic imaging equipment", Proc. SPIE 9045, 2013 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Processing Technology, 904503 (19 December 2013); https://doi.org/10.1117/12.2034082

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KEYWORDS

Imaging systems

Ultrasonics

Endoscopy

Ultrasonography

Endoscopes

Control systems

Reliability

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