Five-freedom-degree accurate positioning device of acoustic transducer used for magnetoacoustic coupling imaging experiment

Abstract

A five-freedom-degree accurate positioning device of an acoustic transducer used for a magnetoacoustic coupling imaging experiment comprises a base plate, a water groove formed in the base plate, an acoustic transducer position adjusting frame located in the water groove and a sample carrying disk, wherein an acoustic transducer installing frame is connected to the acoustic transducer position adjusting frame in a sliding mode, the acoustic transducer position adjusting frame is connected with acoustic transducer scanning driving devices through connecting plates, the acoustic transducer scanning driving devices are arranged on the base plate and used for driving the acoustic transducer installing frame to horizontally move in the X axis direction and the Y axis direction, to vertically move in the Z axis direction and to rotate along the Z axis, the sample carrying disk is connected with a carrying disk rotation driving device through a waterproof cover mechanism arranged on the bottom face in the water groove and a rotary supporting pillar perpendicularly connected to the end, away from the sample carrying disk, of a waterproof cover frame, and the carrying disk rotation driving device is arranged on the base plate and used for driving the sample carrying disk to rotate along the Z axis. According to the five-freedom-degree accurate positioning device of the acoustic transducer used for the magnetoacoustic coupling imaging experiment, the acoustic transducer can be accurately positioned and controlled in five-freedom-degree motions including horizontal movement, rotation and the like, multiple scanning modes can be achieved, and sound source positioning accuracy and sound source positioning stability are guaranteed.

Description

technical field [0001] The invention relates to a magnetoacoustic coupling imaging technology. In particular, it relates to a five-degree-of-freedom precise positioning device for an acoustic transducer driven by a stepping motor and used for magnetoacoustic coupling imaging experiments. Background technique [0002] Magneto-acoustic coupling imaging is a way of imaging bioelectric properties, and its electrical properties can reflect the physiological and pathological states of tissues, thus providing a basis for early diagnosis of diseases. [0003] The basic principle of magneto-acoustic coupling imaging is that for a sample placed in a steady magnetic field, an excitation current of a certain frequency is injected into the sample through electrodes, and the current in the sample is subjected to the Lorentz force under the static magnetic field to generate vibration, vibration The frequency is the same as the frequency of the injected excitation current, and the vibratio...

AI Technical Summary

Problems solved by technology

[0006] However, in the actual work of the magneto-acoustic imaging system, limited by the lack of accurate positioning devices, the relative position of the ultrasonic transducer and the sample can only be determined manually, so that the center position in the horizontal direction corresponds to the surface of the transducer. There are certain errors in the determination of the distance from the first interface of the sample, and there are also great restrictions on the realization of different scanning methods, such as translational scanning

Images