Artificial sound structure lens ultrasonic physiotherapy transducer and method for regulating and controlling focus depth

Abstract

The invention provides an artificial sound structure lens ultrasonic physiotherapy transducer, which is characterized in that an ultrasonic output end of a transducer (2) is fixed at a positioning groove at the bottom end of an artificial sound structure lens, and the ultrasonic output end is tightly attached to the artificial sound structure lens; annular grooves are distributed in the output end of the artificial sound structure lens. The annular groove is filled with epoxy resin (4), and the filling heights of the epoxy resin in different areas of the filling area are different; the artificial sound structure lens takes epoxy resin filled in the annular groove as a phase adjusting medium, and the ultrasonic phase delay is adjusted by changing the filling height proportion of the phase adjusting medium in the annular groove, so that the focus position of the artificial sound structure lens is changed; the problems that in the ultrasonic physical therapy process, sound energy of the ultrasonic physical therapy focus position is insufficient, the ultrasonic physical therapy focus position is shallow, the focus position of the ultrasonic physical therapy transducer is relatively fixed, and the contact face is heated after long-time use can be solved.

Description

Technical Field

[0001] The invention relates to the field of ultrasonic technology, in particular to an artificial acoustic structure lens ultrasonic therapy transducer and a method for adjusting focal depth. Background Art

[0002] In order to obtain high ultrasound intensity at the focal position, it is necessary to concentrate the ultrasound energy to the focal area. In the existing ultrasound therapy application technology, most of them use planar ultrasound therapy transducers as sound sources. The sound energy of planar ultrasound therapy transducers is relatively dispersed, which will cause insufficient sound energy at the ultrasound therapy focus, shallow ultrasound therapy focus position, and relatively fixed ultrasound therapy focus position. The position of the action point can only be changed by moving mechanical devices. Long-term use will cause the contact surface to heat up. Some ultrasound therapy transducers that use spherical self-focusing transducers are expensive, and because the contact surface is a spherical or curved surface, the fit is poor during use. Summary of the invention

[0003] The present invention proposes an artificial acoustic structure lens ultrasonic therapy transducer and a method for adjusting the focal depth, which can solve the problems of insufficient acoustic energy at the ultrasonic therapy focal position, shallow ultrasonic therapy focal position, relatively fixed focal position of the ultrasonic therapy transducer, and heating of the contact surface after long-term use during ultrasonic therapy.

[0004] The present invention adopts the following technical solutions.

[0005] An artificial acoustic structure lens ultrasonic therapy transducer, wherein the ultrasonic output end of the transducer (2) is fixed to a positioning groove at the bottom end of the artificial acoustic structure lens, and the ultrasonic output end is tightly fitted to the artificial acoustic structure lens; an annular groove is distributed at the output end of the artificial acoustic structure lens; the annular groove is filled with epoxy resin (4), and there is a difference in the filling height of the epoxy resin between different areas of the filling area; the artificial acoustic structure lens uses the epoxy resin filled in the annular groove as a phase adjustment medium, and adjusts the phase delay of ultrasound by changing the filling height ratio of the phase adjustment medium in the annular groove, thereby changing the focal position of the artificial acoustic structure lens.

[0006] The transducer is a circular transducer, the artificial acoustic structure lens is based on nylon, the annular groove is a filling medium groove (3) on the nylon base (1), a sealing cover (6) made of nylon material is covered above the nylon base groove, and water (5) is injected between the nylon base groove and the sealing cover to form a water layer, and the water layer is used to reduce the heating problem of the contact surface under long-term use.

[0007] A method for regulating the focal depth of an artificial acoustic structure lens ultrasonic therapy transducer, wherein the method changes the focal depth of the artificial acoustic structure lens by filling epoxy resins with different height ratios, and performs ultrasonic therapy on different depth parts of a target; the method comprises the following steps:

[0008] Step 1: When the artificial acoustic structure lens is used, epoxy resin is first injected into the groove of the nylon matrix as a medium to adjust the phase delay;

[0009] Step 2: inject water into the groove of the nylon base to reduce the heating problem of the contact surface between the lens and the target during long-term use, and add a sealing cover also made of nylon to seal it;

[0010] Step 3: attach an artificial acoustic structure lens to the top of the ultrasonic therapy transducer, and adjust the ultrasonic phase to generate phase superposition at the focal position, that is, utilize the interference effect of sound waves to enhance the focal acoustic energy and realize ultrasonic focusing, so that the acoustic energy is gathered in front of the transducer, that is, a focus is generated in front of the transducer;

[0011] Step 4: Adjust the depth of the focal position by changing the height ratio of the filling medium of the artificial acoustic structure lens, so as to achieve ultrasonic therapy for parts at different depths of the target area.

[0012] In step three, the method for adjusting the ultrasonic phase is to utilize the different sound velocities of ultrasonic waves in epoxy resin and water to achieve phase adjustment by changing the height of the filled epoxy resin.

[0013] The transducer is a circular transducer. In step 4, when adjusting the depth of the focus position, the output surface of the ultrasonic output end of the transducer is first partitioned into multiple circular areas according to a predetermined radius distance, and the average value of the radii of two adjacent circular areas is selected as the value of the circular area, and the value of each circular area is different. After setting the focus position, if the distance from each circular area to the focus is different, the phase of each circular area will be different.

[0014] In step 4, the annular groove area of ​​the acoustic lens substrate of the artificial acoustic structure lens is adapted to the transducer division area, and the height of the epoxy resin filled in the groove is calculated by a formula to achieve phase adjustment of the corresponding area.

[0015] In step 4, the method for adjusting the depth of the focus position is specifically as follows:

[0016] Set the depth value of the focus target position, i.e. the F value, and calculate the phase value at different circle positions using the following formula 1 Then the height of the epoxy resin filled is calculated by the following formula 2. Each circle has a corresponding height h of the epoxy resin filled.

[0017] Formula 1: Where F is the focal length of the designed acoustic lens, r is the radial position of the artificial acoustic structure lens ring, and n is an arbitrary integer.

[0018] Formula 2: Where f is the frequency of the ultrasonic transducer, h is the height of the epoxy resin, and t is the delay time corresponding to the background fluid at the height of h;

[0019] The height h of the filling medium corresponding to the radial position r can be determined by combining Formula 1 and Formula 2.

[0020] In step 2, after the sealing cover is installed on the artificial acoustic structure lens, the structural feature that the height of the sealing cover is greater than the height of the acoustic lens is used to create a positioning groove for installing the transducer at the bottom of the artificial acoustic structure lens, so that the transducer is tightly fitted to the artificial acoustic structure lens.

[0021] In step 4, by controlling the depth of the focus position, higher sound energy is generated at the focus to optimize the ultrasound therapy effect at different depths.

[0022] The method achieves a change in the position of the focal depth by changing the internal structure of the artificial acoustic structure lens, and can be used for the manipulation of acoustic particles, the delivery of drugs, and the stimulation of drugs using ultrasound.

[0023] Aiming at the problem that the acoustic energy of the ultrasonic therapy transducer acts on the surface of the skin but does not penetrate deep enough into the skin, the present invention designs an artificial acoustic structure lens ultrasonic therapy transducer, which is composed of an artificial acoustic structure lens and an ultrasonic therapy transducer and is a device for ultrasonic therapy. The difference between the novel ultrasonic therapy transducer and the traditional ultrasonic therapy transducer is that the phase of different areas of the ultrasonic therapy transducer is adjusted by adding an artificial acoustic structure lens thereto, thereby increasing the acoustic energy at the focal position. At the same time, since the artificial acoustic structure lens is adjustable, the position of the focal depth can be changed by changing the internal structure of the artificial acoustic structure lens.

[0024] Compared with the lens without artificial acoustic structure, the present invention can generate higher acoustic energy at the focus and can control the depth of the focus by changing the height ratio of the epoxy resin, so as to perform ultrasonic physiotherapy on parts at different depths. At the same time, the present invention also sets a water layer above the epoxy resin to reduce the problem of heating of the contact surface after long-term use.

[0025] The advantages of the present invention are: it can effectively increase the acoustic energy at the focal position; it can change the depth of the focal position by adjusting the height ratio of the filling medium; a water layer is set in the artificial acoustic structure lens to reduce the problem of heating of the contact surface of the ultrasonic physiotherapy device during long-term use; the artificial acoustic structure lens is small and light in size and easy to install. The uses of the present invention are: ultrasonic physiotherapy, acoustic particle manipulation, drug delivery and excitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] Attached Figure 1 is a schematic diagram of the present invention (without sealing cover);

[0028] Attached Figure 2 is a schematic diagram of the present invention (with a sealing cover);

[0029] Attached Figure 3 It is a top view schematic diagram of the present invention (without sealing cover);

[0030] Attached Figure 4 is a cross-sectional schematic diagram of the present invention without a sealing cover (focus depth is 15 mm);

[0031] Attached Figure 5 is a cross-sectional schematic diagram of the present invention when a sealing cover is provided;

[0032] Attached Figure 6 is a schematic diagram of a sealing cover of the present invention;

[0033] Attached Figure 7 is another cross-sectional schematic diagram of the present invention without a sealing cover (focus depth is 22 mm);

[0034] In the figure: 1-nylon matrix; 2-transducer; 3-filling medium groove; 4-epoxy resin; 5-water; 6-sealing cover. DETAILED DESCRIPTION

[0035] As shown in the figure, an artificial acoustic structure lens ultrasonic therapy transducer, the ultrasonic output end of the transducer 2 is fixed to the positioning groove at the bottom end of the artificial acoustic structure lens, and the ultrasonic output end is tightly fitted with the artificial acoustic structure lens; an annular groove is distributed at the output end of the artificial acoustic structure lens; the annular groove is filled with epoxy resin 4, and there is a difference in the filling height of the epoxy resin between different areas of the filling area; the artificial acoustic structure lens uses the epoxy resin filled in the annular groove as a phase adjustment medium, and adjusts the phase delay of the ultrasound by changing the filling height ratio of the phase adjustment medium in the annular groove, thereby changing the focal position of the artificial acoustic structure lens.

[0036] The transducer is a circular transducer, the artificial acoustic structure lens is based on nylon, the annular groove is a filling medium groove 3 on the nylon base 1, a sealing cover 6 made of nylon material is covered on the nylon base groove, and water 5 is injected between the nylon base groove and the sealing cover to form a water layer, and the water layer is used to reduce the heating problem of the contact surface under long-term use.

[0037] A method for regulating the focal depth of an artificial acoustic structure lens ultrasonic therapy transducer, wherein the method changes the focal depth of the artificial acoustic structure lens by filling epoxy resins with different height ratios, and performs ultrasonic therapy on different depth parts of a target; the method comprises the following steps:

[0038] Step 1: When the artificial acoustic structure lens is used, epoxy resin is first injected into the groove of the nylon matrix as a medium to adjust the phase delay;

[0039] Step 2: inject water into the groove of the nylon base to reduce the heating problem of the contact surface between the lens and the target during long-term use, and add a sealing cover also made of nylon to seal it;

[0040] Step 3: attach an artificial acoustic structure lens to the top of the ultrasonic therapy transducer, and adjust the ultrasonic phase to generate phase superposition at the focal position, that is, utilize the interference effect of sound waves to enhance the focal acoustic energy and realize ultrasonic focusing, so that the acoustic energy is gathered in front of the transducer, that is, a focus is generated in front of the transducer;

[0041] Step 4: Adjust the depth of the focal position by changing the height ratio of the filling medium of the artificial acoustic structure lens, so as to achieve ultrasonic therapy for parts at different depths of the target area.

[0042] In step three, the method for adjusting the ultrasonic phase is to utilize the different sound velocities of ultrasonic waves in epoxy resin and water to achieve phase adjustment by changing the height of the filled epoxy resin.

[0043] The transducer is a circular transducer. In step 4, when adjusting the depth of the focus position, the output surface of the ultrasonic output end of the transducer is first partitioned into multiple circular areas according to a predetermined radius distance, and the average value of the radii of two adjacent circular areas is selected as the value of the circular area, and the value of each circular area is different. After setting the focus position, if the distance from each circular area to the focus is different, the phase of each circular area will be different.

[0044] In step 4, the annular groove area of ​​the acoustic lens substrate of the artificial acoustic structure lens is adapted to the transducer division area, and the height of the epoxy resin filled in the groove is calculated by a formula to achieve phase adjustment of the corresponding area.

[0045] In step 4, the method for adjusting the depth of the focus position is specifically as follows:

[0046] Set the depth value of the focus target position, i.e. the F value, and calculate the phase value at different circle positions using the following formula 1 Then the height of the epoxy resin filled is calculated by the following formula 2. Each circle has a corresponding height h of the epoxy resin filled.

[0047] Formula 1: Where F is the focal length of the designed acoustic lens, r is the radial position of the artificial acoustic structure lens ring, and n is an arbitrary integer.

[0048] Formula 2: Where f is the frequency of the ultrasonic transducer, h is the height of the epoxy resin, and t is the delay time corresponding to the background fluid at the height of h;

[0049] The height h of the filling medium corresponding to the radial position r can be determined by combining Formula 1 and Formula 2.

[0050] In step 2, after the sealing cover is installed on the artificial acoustic structure lens, the structural feature that the height of the sealing cover is greater than the height of the acoustic lens is used to create a positioning groove for installing the transducer at the bottom of the artificial acoustic structure lens, so that the transducer is tightly fitted to the artificial acoustic structure lens.

[0051] In step 4, by controlling the depth of the focus position, higher sound energy is generated at the focus to optimize the ultrasound therapy effect at different depths.

[0052] The method achieves a change in the position of the focal depth by changing the internal structure of the artificial acoustic structure lens, and can be used for the manipulation of acoustic particles, the delivery of drugs, and the stimulation of drugs using ultrasound.

[0053] Example:

[0054] In this case, in order to solve the problem that the acoustic energy of the ultrasonic therapy transducer acts on the surface of the skin but does not penetrate deep enough into the skin, an artificial acoustic structure lens ultrasonic therapy transducer is designed. The transducer is composed of an artificial acoustic structure lens and an ultrasonic therapy transducer, and is a device used for ultrasonic therapy. The difference between this new ultrasonic therapy transducer and the traditional ultrasonic therapy transducer is that by adding an artificial acoustic structure lens to it, the phase of different areas of the ultrasonic therapy transducer is adjusted, thereby increasing the acoustic energy at the focal position. At the same time, since the artificial acoustic structure lens is adjustable, the position of the focal depth can be changed by changing the internal structure of the artificial acoustic structure lens.

[0055] In this example, the phase is adjusted to produce phase superposition at the focal position, and the interference effect of sound waves is used to enhance the focal sound energy to achieve ultrasonic focusing, and the sound energy is gathered in front of the transducer, that is, a focus is produced in front of the transducer.

[0056] In this example, nylon material is used as the base, and annular grooves are distributed on it for filling epoxy resin of different heights. Epoxy resin is used as a phase adjustment medium, and the phase delay of ultrasound is adjusted by changing the filling height ratio in the groove, thereby changing the focal position. After the epoxy resin is filled, water is injected above the epoxy resin as a filling to form a water layer, and a sealing cover is added for sealing to reduce the temperature of the contact surface during long-term use.

[0057] The artificial acoustic structure lens is attached to the top of the ultrasonic therapy transducer, and after being focused by the artificial acoustic structure lens, ultrasonic therapy is performed on the target depth. During use, the focus depth can be changed by adjusting the filling height ratio of epoxy resin in the groove.

[0058] The artificial acoustic structure lens designed in this example can change the focal depth by filling epoxy resin with different height ratios, and perform ultrasound therapy on parts at different depths. When the lens is used, epoxy resin is first injected into the groove of the nylon matrix as a medium to adjust the phase delay, and then water is injected on it to reduce the problem of heating of the contact surface during long-term use, and a sealing cover made of nylon is added for sealing.

[0059] In this example, an artificial acoustic structure lens is attached to the top of the ultrasonic therapy transducer to achieve ultrasonic focusing. The depth of the focal position is adjusted by changing the height ratio of the filling medium of the artificial acoustic structure lens to achieve ultrasonic therapy for parts at different depths.

Claims

1. Artificial sound structure lens ultrasonic therapy transducer, characterized in that: The ultrasonic output end of the transducer (2) is fixed to the positioning groove at the bottom end of the artificial acoustic structure lens, and the ultrasonic output end is tightly fitted to the artificial acoustic structure lens; an annular groove is distributed at the output end of the artificial acoustic structure lens; the annular groove is filled with epoxy resin (4), and there is a difference in the filling height of the epoxy resin between different areas of the filling area; the artificial acoustic structure lens uses the epoxy resin filled in the annular groove as a phase adjustment medium, and adjusts the phase delay of the ultrasound by changing the filling height ratio of the phase adjustment medium in the annular groove, thereby changing the focal position of the artificial acoustic structure lens.

2. The artificial acoustic structure lens ultrasonic therapy transducer according to claim 1, characterized in that: The transducer is a circular transducer, the artificial acoustic structure lens is based on nylon, the annular groove is a filling medium groove (3) on the nylon base (1), a sealing cover (6) made of nylon material is covered above the nylon base groove, and water (5) is injected between the nylon base groove and the sealing cover to form a water layer, and the water layer is used to reduce the heating problem of the contact surface under long-term use.

3. A method for adjusting the focal depth of an artificial acoustic structure lens ultrasonic therapy transducer, characterized in that: The method changes the focal depth of the artificial acoustic structure lens by filling epoxy resin with different height ratios, and performs ultrasonic physiotherapy on different depth parts of the target; The steps include: Step 1: When the artificial acoustic structure lens is used, epoxy resin is first injected into the groove of the nylon matrix as a medium to adjust the phase delay; Step 2: inject water into the groove of the nylon base to reduce the heating problem of the contact surface between the lens and the target during long-term use, and add a sealing cover also made of nylon to seal it; Step 3: attach an artificial acoustic structure lens to the top of the ultrasonic therapy transducer, and adjust the ultrasonic phase to generate phase superposition at the focal position, that is, utilize the interference effect of sound waves to enhance the focal acoustic energy and realize ultrasonic focusing, so that the acoustic energy is gathered in front of the transducer, that is, a focus is generated in front of the transducer; Step 4: Adjust the depth of the focal position by changing the height ratio of the filling medium of the artificial acoustic structure lens, so as to achieve ultrasonic therapy for parts at different depths of the target area.

4. The method for adjusting the focal depth of an artificial acoustic structure lens ultrasonic therapy transducer according to claim 3, characterized in that: In step three, the method for adjusting the ultrasonic phase is to utilize the different sound speeds of ultrasonic waves in epoxy resin and water to achieve phase adjustment by changing the height of the filled epoxy resin.

5. The method for adjusting the focal depth of an artificial acoustic structure lens ultrasonic therapy transducer according to claim 4, characterized in that: The transducer is a circular transducer. In step 4, when adjusting the depth of the focus position, the output surface of the ultrasonic output end of the transducer is first partitioned into multiple circular areas according to a predetermined radius distance, and the average value of the radii of two adjacent circular areas is selected as the value of the circular area, and the value of each circular area is different. After setting the focus position, if the distance from each circular area to the focus is different, the phase of each circular area will be different.

6. The method for adjusting the focal depth of an artificial acoustic structure lens ultrasonic therapy transducer according to claim 5, characterized in that: In step 4, the annular groove area of ​​the acoustic lens substrate of the artificial acoustic structure lens is adapted to the transducer division area, and the height of the epoxy resin filled in the groove is calculated by a formula to achieve phase adjustment of the corresponding area.

7. The method for adjusting the focal depth of an artificial acoustic structure lens ultrasonic therapy transducer according to claim 6, characterized in that: In step 4, the method for adjusting the depth of the focus position is specifically as follows: Set the depth value of the focus target position, i.e. the F value, and calculate the phase value at different circle positions using the following formula 1 Then the height of the epoxy resin filled is calculated by the following formula 2. Each circle has a corresponding height h of the epoxy resin filled; Formula 1: Where F is the focal length of the designed acoustic lens, r is the radial position of the artificial acoustic structure lens ring, and n is an arbitrary integer. Formula 2: Where f is the frequency of the ultrasonic transducer, h is the height of the epoxy resin, and t is the delay time corresponding to the background fluid at the height of h; The height h of the filling medium corresponding to the radial position r can be determined by combining Formula 1 and Formula 2.

8. The method for adjusting the focal depth of an artificial acoustic structure lens ultrasonic therapy transducer according to claim 7, characterized in that: In step 2, after the sealing cover is installed on the artificial acoustic structure lens, the structural feature that the height of the sealing cover is greater than the height of the acoustic lens is used to create a positioning groove for installing the transducer at the bottom of the artificial acoustic structure lens, so that the transducer is tightly fitted to the artificial acoustic structure lens.

9. The method for adjusting the focal depth of an artificial acoustic structure lens ultrasonic therapy transducer according to claim 7, characterized in that: In step 4, by controlling the depth of the focus position, higher sound energy is generated at the focus to optimize the ultrasound therapy effect at different depths.

10. The method for adjusting the focal depth of an artificial acoustic structure lens ultrasonic therapy transducer according to claim 9, characterized in that: The method achieves a change in the position of the focal depth by changing the internal structure of the artificial acoustic structure lens, and can be used for the manipulation of acoustic particles, the delivery of drugs, and the stimulation of drugs using ultrasound.

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