CN211291727U - High-intensity acoustic focusing ultrasonic sound field scanning device - Google Patents

Abstract

The utility model relates to a high strength acoustic focusing supersound sound field scanning device. The utility model discloses a control system, mechanical structure, scanning receiving arrangement, data acquisition module. The control system comprises a double-shaft motion control PLC, a water path and gas path control PLC and a linear motor, and is connected to the computer through a serial port; the mechanical walking mechanism consists of two linear modules with single degree of freedom; the scanning and receiving device mainly comprises hydrophones in an upward water bag. Before measurement, the PLC controls the motor pump to pump out air in the water bag and discharge water into the water bag, the medical transducer emits high-intensity focused sound waves during measurement, and the hydrophone in the water bag receives sound wave information. The data acquisition device is completed by an acquisition card and transmits acquired data to the computer through the Ethernet. The utility model discloses can realize the detection to medical high strength focus transducer sound field, not only improve medical high strength focus transducer's treatment precision and security performance, the portability of device has still improved detection efficiency.

Description

High-intensity acoustic focusing ultrasonic sound field scanning device

Technical Field

The utility model relates to a high strength acoustic focusing supersound sound field scanning device.

Background

Due to the important function and wide application of medical ultrasonic diagnostic equipment, the measurement of the sound power of a medical ultrasonic source becomes an important branch of medical measurement, and at present, the measurement and calibration of the ultrasonic sound power are always the hot problems of study of scholars, and if the dosage of the ultrasonic sound power is different from a preset value, normal cells around a tumor are damaged, so that complications are caused; or the treatment is not in place, and the disease condition of the patient is repeated, so that the diagnosis and treatment accuracy and timeliness are seriously influenced. At present, devices for measuring the sound power of an ultrasonic source in medical metrological verification generally stay in a stage of a large-scale laboratory for inspection, the timeliness of diagnosis and treatment is greatly reduced, and the transportation distance can physically damage a treatment probe to influence the treatment application of the treatment probe. And there are many drawbacks in the actual metering. The existing acoustic power measurement method can not meet the requirement of field measurement and detection.

In consideration of the characteristics and measurement difficulties of the HIFU sound field, the direct measurement of the focal region position is extremely easy to cause irreversible damage to the sensor, and the process of submitting a large-scale laboratory is complicated, so that the timeliness of ultrasonic diagnosis and treatment is greatly reduced, and the research on the portable ultrasonic power field metering device is urgent.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is not enough to prior art, provide a high strength acoustic focusing supersound sound field scanning device.

The utility model provides a technical scheme that technical problem took does:

a high-intensity acoustic focusing ultrasonic sound field scanning device comprises a control electronic box, a mechanical structure, a scanning receiving device and a data acquisition module; the method is characterized in that: the control system consists of a double-shaft motion control PLC, a water path and gas path control PLC and a linear motor and is connected to the PC through a serial port; the computer sends out an instruction to control the scanning movement of the mechanical walking mechanism and the switch of the water and air pumping and discharging pump through the PLC; the mechanical structure comprises a double-shaft walking mechanism, a stepping motor, a water-gas motor pump and a four-foot leveling bracket; the walking mechanism consists of linear modules with two degrees of freedom; wherein, each module is controlled by a motor, so that the mechanical device has two shafts for electric control; the water-gas motor pump can pump air out of the upward water bag before the measurement is started and pump water out of the water bag after the measurement is finished; the four-foot leveling bracket can adjust the height of the device to align with a downward focusing transducer to be detected, and the level of a measuring surface can be adjusted before detection, so that scanned data is more accurate; the lower end of the scanning receiving device is connected with the traveling mechanism through a connecting rod, the scanning receiving device of the two shafts is mainly composed of hydrophones, and two-dimensional sound field data received by the hydrophones can be collected by a data acquisition card with 8-bit resolution and transmitted to a computer through Ethernet.

The basic principle of the utility model is as follows: the existing acoustic power measuring method can not meet the requirement of field measurement detection, the near-field measuring method belongs to near-field acoustic holography, and is an important sound source positioning and sound field visualization technology established on the basis of an acoustic radiation theory, namely an acoustic wave generation and propagation theory. The method lays a theoretical foundation for a portable ultrasonic field calibration system.

The beneficial effects of the utility model reside in that: aiming at the HIFU focused ultrasound scalpel, the portable field acoustic power metering device is designed according to the characteristics of the medical instrument, and the field detection of a diagnosis and treatment field is realized. The situation of calibration in a large-scale laboratory for inspection is broken through, and theoretical and experimental foundations can be provided for subsequent on-site measurement and detection. The method is beneficial to establishing a quantity value tracing and transmitting system of medical ultrasonic equipment in China, further perfects the metering and verification standards of relevant equipment, and can better ensure that the medical equipment is safely and effectively used. The ultrasonic diagnosis and treatment instrument provides measurement and test guarantee for further development of ultrasonic treatment equipment in China and entrance to the international market, and has great social benefit.

Drawings

Fig. 1 is an overall three-dimensional view of the present device.

Fig. 2 is a top view of the device.

Fig. 3 is an electronic control system.

FIG. 4 is a hardware design flow diagram.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the present invention includes a control system 1, a mechanical structure 2, a scanning receiving device 3, and a data collecting device 4. The control system comprises a two-axis motion control PLC, a water-air pump switch control PLC and a linear motor, and is connected to the computer through a serial port; the running gear scanning system of the measuring device: each module is controlled by a motor, and is electrically controlled by two shafts in total, a hydrophone is arranged in a water bag to be coupled with the medical focusing transducer upwards, and the hydrophone is connected with the motor through a connecting rod and is controlled by the motor to move to perform two-dimensional scanning; the lower part of the device is provided with a four-foot bracket which can be combined with a leveler to adjust the level of the measuring surface; the acquisition device is completed by an acquisition card and transmits data through the Ethernet. The electric control system comprises a motor, a motor driver, a single chip microcomputer control module, an interface program, a limiting sensor, a data acquisition module and other electrical elements, can program a control device to automatically complete detection actions according to user requirements, output a data report, communicate with a computer, facilitate control and data acquisition, and can be perfected and upgraded subsequently according to use conditions.

The measuring object is the ultrasonic tumor treatment system of focus down, places this portable water tank structure in medical HIFU treatment instrument below, puts up the platform structure on HIFU transducer's the face of being detected, and water tank upper portion is with customization silica gel water pocket as the flexible coupling part, can guarantee to detect the motion space of head, also can let water pocket upper portion with be detected the seamless laminating of face. The water bag is fixed at the upper end of the water tank, the maximum diameter of the water bag is 30cm, and the water bag is fixed at the lower end of the water tank by a sealing ring. Be fixed with two-dimentional slip table module on the ya keli mesa, can biax motion, make things convenient for the scanning of follow-up two-dimentional sound field. A vertical direction shaft is arranged perpendicular to the table top, and the motor can control the motion in the vertical direction, so that the scanning of the sound field surface is finally realized. And the lower end of the vertical shaft is fixedly provided with a clamp structure for fixing a hydrophone, and the hydrophone is arranged in the water bag and is connected with the two-dimensional travelling mechanism through a connecting rod. And a pipeline for controlling the air exhaust and the water drainage of the water bag is also connected with the water bag.

The specific operation method comprises the following steps: firstly, a control system sends an instruction to a water-air pump to completely exhaust air in a water bag of the detection device and simultaneously put sufficient water, and then the water bag of the detection device is placed under a medical ultrasonic transducer which focuses downwards to enable the water bag to be tightly attached to the contact surface of a probe of the transducer. After the operation is finished, the whole measuring device needs to be adjusted to be horizontal before measurement, the height of the four-foot support is adjusted, and the measuring surface is adjusted to be horizontal by matching with the leveler so that the measured data are accurate. When the measurement is started, the medical focusing transducer facing downwards emits sound waves, and the sound waves are transmitted into the water bag of the detection device and received by the hydrophone through the coupling effect of the water bag device and the transducer. The device for receiving sound waves in the water bag is fixed on a mechanical travelling mechanism and is electrically controlled by two shafts, stepping motors of linear modules in two directions are given by a PLC program and can move on a two-dimensional plane, so that the receiving device can receive data of the two-dimensional plane along with the movement of the travelling mechanism, the received two-dimensional sound field data can be collected by a data collection card with 8-bit resolution, special requirements are placed on the selection of the data collection card due to the measurement of sound power and sound field characteristics of High Intensity Focused Ultrasound (HIFU), and the voltage signals received by a hydrophone are very small in the data collection process, so that the processing such as filtering amplification is needed, and then the electric signals are converted into analog signals through an A/D conversion module and the Ethernet and then the analog signals are input into a computer. And after the measurement is finished, the water-air pump is started again to pump out the water in the water bag and introduce air.

Claims (1)

1. A high-intensity acoustic focusing ultrasonic sound field scanning device comprises a control electronic box, a mechanical structure, a scanning receiving device and a data acquisition module; the method is characterized in that: the control system consists of a double-shaft motion control PLC, a water path and gas path control PLC and a linear motor and is connected to the PC through a serial port; the computer sends out an instruction to control the scanning movement of the mechanical walking mechanism and the switch of the water and air pumping and discharging pump through the PLC; the mechanical structure comprises a double-shaft walking mechanism, a stepping motor, a water-gas motor pump and a four-foot leveling bracket; the walking mechanism consists of linear modules with two degrees of freedom; wherein, each module is controlled by a motor, so that the mechanical device has two shafts for electric control; the water-gas motor pump can pump air out of the upward water bag before the measurement is started and pump water out of the water bag after the measurement is finished; the four-foot leveling bracket can adjust the height of the device to align with a downward focusing transducer to be detected, and the level of a measuring surface can be adjusted before detection, so that scanned data is more accurate; the lower end of the scanning receiving device is connected with the traveling mechanism through a connecting rod, the scanning receiving device of the two shafts is mainly composed of hydrophones, and two-dimensional sound field data received by the hydrophones can be collected by a data acquisition card with 8-bit resolution and transmitted to a computer through Ethernet.

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