CN106419956A - Portable mobile medical ultrasonic detection device with high automation degree - Google Patents

Abstract

The invention discloses a portable and mobile medical ultrasonic detection device with high automation, which includes installing a hydrophone, using a positioning rod pointing to the center of the circle to initially position the hydrophone, using a camera and image recognition and processing built in a computer The software performs secondary positioning on the hydrophone. According to computer instructions, the lifting bracket can automatically and accurately place the hydrophone in the water tank of the ultrasonic equipment, and use the hydrophone and the sound power detection software built in the computer for ultrasonic detection and Steps such as ultrasonic testing in all directions. After adopting the above method, the hydrophone can automatically detect the ultrasonic value at the location, and transmit the detected ultrasonic value and the position information detected in the fourth step to the computer together. Therefore, the operation is simple and convenient, and the installation and positioning of the hydrophone are accurate and fast.

Description

Portable mobile medical ultrasonic detection device with high degree of automation

technical field

The invention relates to an ultrasonic detection method, in particular to a method for using a portable mobile medical ultrasonic detection device.

Background technique

The use of ultrasound in medicine is becoming increasingly important. From the perspective of its application, we can roughly divide medical ultrasound into two application directions: diagnostic ultrasound and therapeutic ultrasound.

The application of diagnostic ultrasound is relatively mature at present, from A-mode, B-modc, C-mode to M-mode, and high-order harmonic imaging There are many types of B-ultrasound, and the technology is relatively mature.

In recent years, therapeutic ultrasound has successively made breakthroughs in ultrasonic focused knife and ultrasonic lithotripsy, and has achieved seven major developments in clinical application, especially focused ultrasonic knife (High Intensity Focal Ultrasound (HIM) has a leading position in China. The development of the world has very great application prospects. However, compared with the wide application of medical ultrasound, the restrictive factors of its development are also evident.

The application of medical ultrasound is a precise application of the ultrasonic sound field. Theoretically speaking, this kind of application must first have a complete and accurate description and measurement of the medical ultrasonic sound field. However, due to the particularity of ultrasonic measurement and the complexity of human tissue structure, it is extremely difficult to accurately describe and measure the ultrasonic sound field in the human body. Therefore, the application of medical ultrasound has taken a path of first application. That is to say, under the condition of a general description of the sound field, the application of ultrasound is carried out first, and medical experience in animal experiments and clinical applications is obtained for future guidance. Facing the difficult accurate description and measurement of the sound field, leave it for later.

Under such circumstances, the medical application of medical ultrasound is at the forefront, and has achieved remarkable results, and its diagnostic and therapeutic effects have been widely recognized by the medical community. However, when we have confirmed the efficacy of medical ultrasound, its acoustic measurement is still in an immature and imperfect stage, and it is far from being compared with the successful application of medical ultrasound. It can be said that in medical ultrasound In terms of the application of scientific research, the contribution of medical scientists is greater than that of acousticians. For example, the previous sound field space measurement adopts the screw drive space scanning method, its accuracy and measurement range are limited, and it is far from meeting the requirements of the IEC standard.

However, in today's rapid development of electronic technology and computer technology, if acoustic measurement can be combined with the latest technology, we believe that it is entirely possible to break through the original measurement limitations, so as to initially meet the needs of medical clinical applications.

As we all know, in the diagnosis and treatment of diseases, in order to ensure the effect of diagnosis and treatment, medical ultrasound equipment needs clear ultrasound images. However, the clearer the image, the greater the output sound power of the diagnostic ultrasound equipment, and the excessive ultrasound output power will It will produce biological changes to human tissues, and may even cause fetal deformities. Therefore, it has become a pair of contradictory subjects to not only ensure safety, but also to achieve clear images and biological effects. In order to ensure the safe use of ultrasound equipment, the industry has raised the issue of the safety threshold of ultrasound used in medical ultrasound equipment. For this reason, the acoustic parameters of medical ultrasound equipment must be evaluated to ensure the safety in clinical application.

A hydrophone, also known as an underwater microphone, is a transducer that converts underwater acoustic signals into electrical signals. It is an instrument that uses the characteristics of materials and various modulation effects generated by its interaction with the surrounding environment to detect signals such as pressure and sound in liquids. In the civilian field, hydrophones can be used for oil exploration, marine biological monitoring, and seabed inspections by detecting underwater acoustic signals. In the military field, as the front end of the sonar system, the hydrophone is responsible for detecting enemy target signals. The use of hydrophones in medicine can be used to detect the ultrasound in medical ultrasound equipment to determine whether these ultrasound values are within the safe receiving range.

The application number published on December 27, 2007 is Chinese Invention Patent No. 200610088285.4, and the name of its invention is "Medical Ultrasonic Detection Method and System". Among them, the medical ultrasonic detection device includes a hydrophone for measurement in the water tank. The hydrophone is set on a three-coordinate machine, and the three-coordinate machine is set in a solid granite structure, and the three-coordinate machine measurement device adopts a full air floatation Vibration isolation structure, the full air-floating vibration isolation is set on the high-precision air-floating guide rail for three-dimensional space measurement, and also includes a bracket with acoustic emission or simultaneous acoustic reception. The transducer is provided with pitch angle and left and right swing on the bracket Angular axis of adjustment.

In addition, in the above-mentioned patent application, the medical ultrasonic detection method is: use hydrophone to measure in the water tank, measure the spatial sound field distribution and time sound field distribution, and measure the sound parameters, and use a three-dimensional space accurate scanning system to complete Measure the spatial and temporal distribution of the medical ultrasonic sound field (sound pressure); the three-dimensional space precision scanning system uses the basic measurement of the three-coordinate machine to realize the measurement of the spatial sound field; the three-coordinate machine is used for measurement in a solid granite structure, and the three-dimensional The coordinate measuring device adopts full air-floating vibration isolation to block the usual vibration interference; the full air-floating vibration isolation is set on the air-floating guide rail of the high-precision three-coordinate machine for three-coordinate space measurement.

The above-mentioned medical ultrasound detection method and system, for the first time, use hydrophones in medical ultrasound, and can successfully detect medical ultrasound.

The application number published on April 29, 2009 is Chinese Invention Patent No. 200810236253.3, and the name of its invention is "Medical Ultrasonic Detection System", which includes a glass water tank, and a glass partition is arranged in one end of the glass water tank. The glass partition divides the sink into two tanks, one large and one small. The bottoms of the two tanks are connected, and a bracket is installed around the aforementioned glass water tank to support the X-direction granite horizontal guide rail; the X-direction granite horizontal guide rail has a Y-direction granite horizontal guide rail on the horizontal frame, and the Y-direction granite horizontal guide rail The guide rail is connected with the screw drive mechanism that drives it to move along the X direction. A compressed air inlet is provided on the end face of the Y direction granite horizontal guide rail. A horizontal slide table installed on the aforementioned Y direction granite horizontal guide rail, a A mounting bar that moves up and down and a transducer clamp.

However, the above-mentioned medical ultrasonic detection system and the medical ultrasonic detection method and system still have the following deficiencies:

1. The three-coordinate junction or X/Y-direction granite horizontal guideway has a huge and complex structure and cannot be moved casually. Even after moving, it is necessary to re-adjust the three-coordinate or horizontal guideway, so it is generally installed in a fixed place. For medical ultrasound equipment in different regions, detection is very inconvenient.

2. The positioning and installation of the hydrophone still requires manual operation. However, the water tanks of general medical ultrasonic equipment are set in higher places, so on the one hand, the labor intensity is high, and there are hidden dangers; on the other hand, the installation and positioning accuracy of the hydrophone is not high, and it takes a long time ,low efficiency.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for using a portable mobile medical ultrasonic detection device that is easy to operate, high in automation, accurate in installation and positioning of hydrophones, and fast in view of the above-mentioned deficiencies in the prior art.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A method for using a portable mobile medical ultrasonic detection device, comprising the following steps:

The first step is to install the hydrophone; slide the base with the lifting bracket next to the water tank of the ultrasonic equipment to be tested and lock it, and install the hydrophone on the fixed seat of the hydrophone mounting arm. The mounting arm is in a concave arc shape, so that the hydrophone, the free end of the positioning rod coincident with the center of the hydrophone mounting arm, and the camera are on the same axis.

The second step is the initial positioning of the hydrophone; the fixing seat in the first step is raised so that the top of the hydrophone is close to the free end of the positioning rod, and the initial positioning is completed.

The third step is the secondary positioning of the hydrophone; in the second step, the positioning rod is turned up 90°, the camera automatically focuses on the top of the hydrophone, takes pictures, and transmits the photos to the computer, which has built-in image recognition and image processing The software processes the received pictures, and then calculates the distance between the top of the hydrophone and the center of the hydrophone installation arm. Then, the computer instructs the fixing seat in the second step to continue to rise to the distance calculated by the computer, and the secondary positioning is completed. .

In the fourth step, the hydrophone is placed in the water tank of the ultrasonic equipment: according to the height, length and width of the water tank, the lifting bracket is raised, and the cross bar is stretched, so that the installation rod is located directly above the water tank; then, the lifting bracket is lowered to make the water tank The hydrophone is slowly immersed in the water tank, and the sensitive surface on the top of the hydrophone is located at 1/2-2/3 of the height of the water tank; the hydrophone is a magnetic composite three-dimensional vector hydrophone, and the magnetic composite three-dimensional vector hydrophone can resist Noise interference, and can automatically measure the position of the hydrophone in the tank.

The fifth step, ultrasonic detection: the hydrophone in the fourth step will automatically detect the ultrasonic value at the location, and transmit the detected ultrasonic value and the position information detected in the fourth step to the computer.

Step 6, Ultrasonic testing in all directions: In the fourth step, the installation rod is rotated 90°, and the hydrophone is also rotated 90° at the same time. After stopping, the ultrasonic value at 90° is detected again, and then the ultrasonic value and The location information is sent to the computer again; similarly, the hydrophone rotates 180°, 270° and repeats the above operations.

The hydrophone installation arm can swing back and forth. Between the third step and the fourth step, the detection of the fluctuation accuracy of the hydrophone is also included: the hydrophone swings back and forth, and the camera monitors the top of the hydrophone at a set frequency. The sensitive surface is focused and photographed, and the computer calculates and judges whether the fluctuation range value of the sensitive surface at the top of the hydrophone is within the set range based on the information provided by the camera.

Before the detection of the fluctuation accuracy of the hydrophone and the placement of the hydrophone in the water tank of the ultrasonic equipment, the detection of the rotation accuracy of the hydrophone is also included: the hydrophone is rotated by 90°, 180°, and 270° respectively, and the camera controls each The sensitive surface on the top of the hydrophone is focused and photographed, and the computer automatically calculates the fluctuation range value of the sensitive surface on the top of the hydrophone at each angle position.

The forward and backward swing range of the hydrophone mounting arm is ±60°.

The mounting rod is made of granite.

After the method is adopted in the present invention, the detection device can be quickly moved to the water tank to be detected, the use is convenient, the whole installation and detection are automatically completed, and the degree of automation is high. In addition, the hydrophone can be positioned quickly and accurately, and saves manpower.

Description of drawings

Fig. 1 is a structural schematic diagram of an ultrasonic detection device for portable mobile medical ultrasonic equipment of the present invention;

Fig. 2 is a schematic diagram of the working state of the ultrasonic detection device for portable mobile medical ultrasonic equipment of the present invention.

Among them: 1. base; 2. roller; 3. lifting bracket; 4. support arm; 5. installation rod; 6. hydrophone installation arm; 7. cross bar; .Installation clip; 11. Positioning rod; 12. Fixing seat; 13. Camera; 14. Water tank.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

As shown in FIG. 1 , a portable mobile medical ultrasonic detection device includes a base 1 , a number of rollers 2 with a locking function arranged under the base 1 , a lifting bracket 3 vertically arranged on the base 1 , and a computer 9 .

The above-mentioned base 1 with the rollers 2 enables the ultrasonic testing device of the application to be carried or slid freely to the position of the ultrasonic equipment to be tested.

The lifting of the height of the lifting bracket 3 is preferably controlled by a motor connected to the computer 9 , the motor is preferably a servo motor, and is built in the base 1 .

A horizontal bar 7 whose length can be stretched is arranged horizontally on the top of the lifting bracket 3 . The expansion and contraction of the cross bar 7 is also preferably controlled by a motor connected to the computer 9 , and the motor is also preferably a servo motor and built in the base 1 . In this way, the height lifting of the lifting bracket 3 and the length expansion and contraction of the cross bar 8 can be accurately controlled according to the instructions of the computer 9 .

A support arm 4 is connected to the other end of the cross bar 7, and a rotatable installation rod 5 is provided at the bottom end of the support arm 4, and the installation rod 5 is preferably made of granite. An angle sensor connected with a computer 9 is arranged on the installation rod 5 . The rotation of the mounting rod 5 is also preferably controlled by a motor connected to the computer 9 , the motor is preferably a servo motor, and is built in the base 1 . In addition, the angle sensor can automatically detect the rotation angle of the installation rod 5, and at the same time, it can precisely control the rotation angle of the installation rod 5 according to the instruction of the computer 9, so that it meets the set requirements.

A mounting clip 10 is provided at the bottom of the above-mentioned mounting rod 5 , and one end of the mounting clip 10 is fixedly connected to the mounting rod 5 , that is, it can rotate with the rotation of the mounting rod 5 .

The top of the other end of the mounting clip 10 is provided with a groove penetrating outward, and a positioning rod 11 is disposed in the groove, and the positioning rod 11 can be folded upward at an angle of 90°. The overturning of the positioning rod 11 is also preferably controlled by a motor connected to the computer 9 , and the motor is also preferably a servo motor and built in the base 1 . The bottom of the other end of the mounting clip 10 is connected with a hydrophone mounting arm 6, preferably the hydrophone mounting arm 6 can swing back and forth, and the swing range is preferably ±60°. When it stops at the lowest point, it can also be locked automatically to prevent it from swinging. The swing of the hydrophone mounting arm 6 is also preferably controlled by a motor connected to the computer 9. The motor is also preferably a servo motor and built in the base 1. . Therefore, the swing amplitude and the swing frequency of the hydrophone mounting arm 6 can be set accurately. Here, the swing frequency needs to be set a little slower so that the follow-up camera 13 can take pictures clearly.

The above-mentioned hydrophone mounting arm 6 has a concave arc shape, so it can be kept away from the center of the sound field to avoid interference, so that the test results can be more accurate and the reliability of the test data is high during ultrasonic testing.

A fixing base 12 for installing the hydrophone 8 is provided on the bottom inner side of the hydrophone mounting arm 6 . The hydrophone here is preferably a vector hydrophone, such as a magnetic composite three-dimensional vector hydrophone, so the vector information and location information of the sound field can be obtained, and the anti-noise interference ability and line spectrum detection ability of the system can be improved. The height of the fixed seat 12 can be raised and lowered, and its height is also controlled by a motor connected to the computer 9 . The motor is also preferably a servo motor and built in the base 1 .

When the above-mentioned positioning rod 11 is not turned upwards, the free end of the positioning rod 11 can coincide with the center of circle of the hydrophone mounting arm 6, and at least one camera connected to the computer 9 is also provided on the support arm 4 around the mounting rod 5 13. The vertical distance between each camera 13 and the installation pole 5 is equal to the radius of the hydrophone installation arm 6 . That is, each camera 13 corresponds to the top sensitive surface of the hydrophone 8, so that it can be quickly focused and positioned to take pictures.

The above-mentioned computer 9 has built-in sound power detection software and image recognition and image processing software.

As shown in Figure 2, a method for using a portable mobile medical ultrasonic detection device includes the following steps:

The first step is to install the hydrophone; slide the base 1 with the lifting bracket 3 next to the water tank 14 of the ultrasonic equipment to be tested and lock it, and install the hydrophone 8 on the fixed seat 12 of the hydrophone mounting arm 6 . The hydrophone mounting arm 6 is concave arc-shaped, so that the hydrophone 8, the free end of the positioning rod 11 coincident with the center of circle of the hydrophone mounting arm 6, and the camera 13 are on the same axis.

The second step is the initial positioning of the hydrophone; the fixing seat 12 in the first step is raised so that the top of the hydrophone 8 is close to the free end of the positioning rod 11, and the initial positioning is completed.

In the third step, the secondary positioning of the hydrophone; the positioning rod 11 in the second step is turned upwards by 90°, and the camera 13 automatically focuses on the top of the hydrophone 8, takes pictures, and transmits the photos to the computer 9, which is built into the computer 9. Image recognition and image processing software process the received pictures, then calculate the distance between the top of the hydrophone 8 and the center of the circle of the hydrophone mounting arm 6, and then the computer 9 instructs the fixing seat 12 in the second step to continue to rise to the computer 9 The calculated distance value, the secondary positioning is completed.

The fourth step is to detect the fluctuation accuracy of the hydrophone: the hydrophone 8 swings back and forth, the camera 13 focuses and takes pictures on the sensitive surface at the top of the hydrophone 8 according to the set frequency, and the computer 9 calculates and judges according to the information provided by the camera Whether the fluctuation range value of the sensitive surface at the top of the hydrophone 8 is within the set range.

The fifth step is to detect the rotation accuracy of the hydrophone: the hydrophone 8 is rotated 90°, 180°, and 270° respectively, the camera 13 focuses and takes pictures of the sensitive surface at the top of the hydrophone 8 at each position, and the computer 9 automatically calculates At each angular position, the fluctuation range value of the sensitive surface at the top of the hydrophone 8.

In the sixth step, the hydrophone is placed in the water tank of the ultrasonic equipment: according to the height, length and width of the water tank 14, the lifting bracket 3 is raised, and the cross bar 7 is stretched, so that the installation rod 5 is located directly above the water tank 14; The support 3 descends, so that the hydrophone 8 is slowly immersed in the water tank 14, and the sensitive surface of the top of the hydrophone 8 is located at 1/2-2/3 of the height of the water tank 14; the hydrophone 8 is a magnetic composite three-dimensional vector hydrophone, which can The position of the hydrophone 8 in the tank 14 is automatically measured.

The seventh step, ultrasonic detection: the hydrophone 8 in the fourth step will automatically detect the ultrasonic value at the location, and transmit the detected ultrasonic value and the position information detected in the fourth step to the computer 9 together.

The eighth step, ultrasonic testing in all directions: in the fourth step, the installation rod 5 rotates 90°, and the hydrophone 8 also rotates 90° accordingly. After stopping, detect the ultrasonic value at 90° again, and then the ultrasonic The value and position information are sent to the computer 9 again; similarly, the hydrophone rotates 180°, 270° and repeats the above operations.

Claims (1)

1. A method for using a portable mobile medical ultrasonic testing device, characterized in that: comprising the following steps: The first step is to install the hydrophone; slide the base with the lifting bracket next to the water tank of the ultrasonic equipment to be tested and lock it, and install the hydrophone on the fixed seat of the hydrophone mounting arm. The mounting arm is concave and arc-shaped, so that the hydrophone, the free end of the positioning rod coincident with the center of the hydrophone mounting arm, and the camera are on the same axis; The second step is the initial positioning of the hydrophone; the fixing seat in the first step is raised so that the top of the hydrophone is close to the free end of the positioning rod, and the initial positioning is completed; The third step is the secondary positioning of the hydrophone; in the second step, the positioning rod is turned up 90°, the camera automatically focuses on the top of the hydrophone, takes pictures, and transmits the photos to the computer, which has built-in image recognition and image processing The software processes the received pictures, and then calculates the distance between the top of the hydrophone and the center of the hydrophone installation arm. Then, in the second step, the fixing seat continues to rise to the distance calculated by the computer, and the secondary positioning is completed; In the fourth step, the hydrophone is placed in the water tank of the ultrasonic equipment: according to the height, length and width of the water tank, the lifting bracket is raised, and the cross bar is stretched, so that the installation rod is located directly above the water tank; then, the lifting bracket is lowered to make the water tank The hydrophone is slowly immersed in the water tank, and the sensitive surface on the top of the hydrophone is located at 2/3 of the height of the water tank; the hydrophone is a magnetic composite three-dimensional vector hydrophone, which can resist noise interference, and Can automatically measure the position of the hydrophone in the water tank; The fifth step, ultrasonic detection: the hydrophone in the fourth step will automatically detect the ultrasonic value at the location, and transmit the detected ultrasonic value and the position information detected in the fourth step to the computer; Step 6, Ultrasonic testing in all directions: In the fourth step, the installation rod is rotated 90°, and the hydrophone is also rotated 90° at the same time. After stopping, the ultrasonic value at 90° is detected again, and then the ultrasonic value and The location information is sent to the computer again; in the same way, the hydrophone rotates 180° or 270°, and the hydrophone also rotates 80° or 270°, after stopping, the ultrasonic value at 80° or 270° is detected again , and then send the ultrasonic value and position information to the computer again; The rotation of the installation rod is controlled by a motor connected with a computer.