Stepping motor control system applied to four-dimensional ultrasonic probe

Abstract

The invention provides a stepping motor control system applied to a four-dimensional ultrasonic probe. The stepping motor control system is used for improving the compatibility capacity of an ultrasonic system on the four-dimensional ultrasonic probe. According to the scheme, the stepping motor control system comprises a transmission mechanism connected with an energy converter, a stepping motor, a driver, an FPGA chip and a main processor, and a sine table is generated by the main processor according to subdividing numbers and is sent to the FPGA chip; a pulse separation table is generated by the main processor according to a speed change angle, the scanning angle speed and the stepping angle of the energy converter and is sent to the FPGA chip; a scanning angle is sent to the FPGA chip through the main processor; the FPGA chip controls the driver to output pulse signals according to the scanning angle, the sine table and the pulse separation table, and the stepping motor and the transmission mechanism control the energy converter to rotate. Through the scheme, a CPU in the ultrasonic system can be used for carrying out high-performance data commutating, therefore, control parameters of the four-dimensional ultrasonic probe are provided for an FPGA, and the compatibility capacity of the ultrasonic system on various four-dimensional ultrasonic probes is improved.

Description

technical field [0001] The invention relates to the technical field of ultrasonic diagnosis, in particular to a stepper motor control system applied to a four-dimensional ultrasonic probe. Background technique [0002] The four-dimensional ultrasonic probe includes: a transducer, a motor and a transmission mechanism, and is used for ultrasonic scanning in three-dimensional space and time-dimension. The two-dimensional ultrasonic probe can only acquire two-dimensional ultrasonic images, while the motor-driven transmission mechanism of the four-dimensional ultrasonic probe makes the transducer scan within a certain angle range. During the scanning process of the transducer, the ultrasonic front-end controls the transducer to emit Ultrasound, when the ultrasound reaches the interface with different acoustic impedances, reflected echo signals are generated, and these reflected echo signals can reflect the distribution of uneven tissues in the human body. After the ultrasonic fr...

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Problems solved by technology

However, FPGA resources are limited, so only limited scan angle and scan angular velocity parameters can be stored

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