Artificial acoustic lens transducer for ultrasonic physiotherapy and method for regulating focal depth

Abstract

The application provides an artificial sound structure lens ultrasonic physiotherapy transducer, an ultrasonic output end of the transducer (2) is fixed at a positioning groove at a bottom end of an artificial sound structure lens, and the ultrasonic output end is closely combined with the artificial sound structure lens; a ring-shaped groove is distributed at an output end of the artificial sound structure lens; epoxy resin (4) is filled in the ring-shaped groove, and the filling height of the epoxy resin is different between different regions of the filling area; the artificial sound structure lens takes the epoxy resin filled in the ring-shaped groove as a phase adjusting medium, adjusts the phase delay of ultrasonic waves by changing the filling height proportion of the phase adjusting medium in the ring-shaped groove, and changes the focal point position of the artificial sound structure lens; and the application can solve the problems of insufficient sound energy of the ultrasonic physiotherapy focal point position, the shallow ultrasonic physiotherapy focal point position, the relatively fixed focal point position of the ultrasonic physiotherapy transducer, and the heating of the contact surface after long-time use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrasonic, in particular to an artificial acoustic structure lens ultrasonic physiotherapy transducer and a method for regulating focal depth. BACKGROUND

[0002] In order to obtain high ultrasonic intensity at the focal position, it is necessary to concentrate ultrasonic energy to the focal position. In the existing ultrasonic physiotherapy application technology, a planar ultrasonic physiotherapy transducer is mostly used as a sound source. The sound energy of the planar ultrasonic physiotherapy transducer is relatively dispersed, thus causing insufficient sound energy of the ultrasonic physiotherapy focal point, shallow ultrasonic physiotherapy focal point position, and relatively fixed ultrasonic physiotherapy focal point position which can only be changed by moving a mechanical device to change the position of the action point. Long-time use can cause heating of the contact surface. Some ultrasonic physiotherapy transducers using a spherical self-focusing transducer are expensive, and the contact surface is a spherical or curved surface, thus causing poor fitting during use. SUMMARY

[0003] The present application provides an artificial acoustic structure lens ultrasonic physiotherapy transducer and a method for regulating focal depth, which can solve the problems of insufficient sound energy of the ultrasonic physiotherapy focal point, shallow ultrasonic physiotherapy focal point position, and relatively fixed ultrasonic physiotherapy focal point position which can only be changed by moving a mechanical device to change the position of the action point, and long-time use can cause heating of the contact surface.

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

[0005] The artificial acoustic structure lens ultrasonic physiotherapy transducer is 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 with the artificial acoustic structure lens; the output end of the artificial acoustic structure lens is provided with an annular groove; the annular groove is filled with epoxy resin (4), and the filling height of the epoxy resin in different regions is different; the artificial acoustic structure lens uses the epoxy resin filled in the annular groove as a phase adjusting medium, adjusts the phase delay of the ultrasonic by changing the filling height proportion of the phase adjusting medium in the annular groove, and changes the focal point position of the artificial acoustic structure lens.

[0006] The transducer is a circular transducer, the artificial acoustic structure lens uses nylon as a base body, the annular groove is a filling medium groove (3) on the nylon base body (1), a sealing cover (6) made of nylon is arranged above the nylon base body groove, and a water layer is formed by injecting water (5) between the nylon base body groove and the sealing cover, which is used to reduce the heating problem of the contact surface under long-time use.

[0007] The method for regulating focal depth of the artificial acoustic structure lens ultrasonic physiotherapy transducer is characterized in that the focal depth of the artificial acoustic structure lens is changed by filling epoxy resin with different height proportions, and ultrasonic physiotherapy is performed on different depth positions of the target; the method comprises the following steps:

[0008] Step one, when using the artificial acoustic structure lens, first inject epoxy resin into the nylon base groove as a medium for adjusting the phase delay;

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

[0010] Step three, attach the artificial acoustic structure lens to the top of the ultrasonic physiotherapy transducer, adjust the ultrasonic phase to produce phase superposition at the focal point position, that is, use the interference effect of sound waves to improve the focal point sound energy and achieve ultrasonic focusing, and the sound energy is concentrated in front of the transducer, that is, a focal point is generated in front of the transducer;

[0011] Step four, adjust the focal point position depth by changing the filling medium height ratio of the artificial acoustic structure lens to achieve ultrasonic physiotherapy on different depth parts of the target area.

[0012] In step three, the method of adjusting the ultrasonic phase is to use 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.

[0013] The transducer is a circular transducer, and in step four, when adjusting the focal point position depth, first divide the output surface of the transducer ultrasonic output end into multiple circular ring regions according to the predetermined radius distance, select the average value of the radii of two adjacent circular rings as the value of the circular ring region, and the value of each circular ring region is different. After setting the focal point position, if the distance from each circular ring region to the focal point is different, the phases of each circular ring region are different.

[0014] In step four, the acoustic lens base annular groove region of the artificial acoustic structure lens is adapted to the divided regions of the transducer, and the height of the filled epoxy resin in the groove is calculated by formula to achieve phase adjustment of the corresponding region.

[0015] In step four, the method of adjusting the focal point position depth is as follows:

[0016] Set the depth value of the focal point target position, that is, the F value, and calculate the phase value at different circle layer positions by the following formula 1 And calculate the height of the filled epoxy resin by the following formula 2, each circle layer has a corresponding filled epoxy resin height h;

[0017] Formula 1: Where F is the designed acoustic lens focal length, r is the radial position of the artificial acoustic structure lens circular ring, the frequency wavelength of the ultrasonic physiotherapy transducer; n is an arbitrary integer

[0018] Formula 2: wherein f is the frequency of the ultrasound transducer, h is the height of the epoxy resin, and t is the delay time of the background fluid at the height h.

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

[0020] In step two, after the artificial sound structure lens is installed with the sealing cover, the artificial sound structure lens bottom appears a positioning groove for installing the transducer by the structural feature that the sealing cover height is greater than the sound lens height, so that the transducer is closely attached with the artificial sound structure lens.

[0021] In step four, the position depth of the focal point is controlled to generate higher sound energy at the focal point, so as to optimize the ultrasonic physiotherapy effect of different depth parts.

[0022] The method can be used for the manipulation of acoustic particles, the delivery of drugs and the excitation of drugs by changing the internal structure of the artificial sound structure lens to change the position of the focal point depth.

[0023] The present application is aimed at the problem that the ultrasonic physiotherapy transducer sound energy acts on the skin surface and does not penetrate into the skin. An artificial sound structure lens ultrasonic physiotherapy transducer is designed, which is composed of an artificial sound structure lens and an ultrasonic physiotherapy transducer and is a device for ultrasonic physiotherapy. The difference between the new ultrasonic physiotherapy transducer and the traditional ultrasonic physiotherapy transducer is that the phase of different regions of the ultrasonic physiotherapy transducer is adjusted by attaching an artificial sound structure lens to it, so as to improve the sound energy at the focal point position. At the same time, the artificial sound structure lens can be adjusted, and the position of the focal point depth can be changed by changing the internal structure of the artificial sound structure lens.

[0024] Compared with the artificial sound structure lens not attached, the present application can generate higher sound energy at the focal point and control the position depth of the focal point by changing the height proportion of the filled epoxy resin to perform ultrasonic physiotherapy on different depth parts. Meanwhile, the present application also sets a water layer above the epoxy resin to alleviate the problem of heating of the contact surface during long-term use.

[0025] The present application has the advantages of effectively improving the sound energy at the focal point position, changing the position depth of the focal point by adjusting the height proportion of the filled medium, setting a water layer in the artificial sound structure lens to alleviate the problem of heating of the contact surface of the ultrasonic physiotherapy instrument during long-term use, and the artificial sound structure lens has small and light structure size and is easy to install. The present application is used for ultrasonic physiotherapy, acoustic particle manipulation, drug delivery and excitation. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described in detail in combination with the drawings and specific embodiments:

[0027] Figure 1 is a schematic diagram of the present application (without sealing cover); Figure 1 Figure 2 is a schematic diagram of the present application (with sealing cover);

[0028] Figure 2 Figure 3 is a schematic diagram of the present application (without sealing cover);

[0029] Figure 4 is a schematic diagram of the present application (with sealing cover); Figure 3 Figure 5 is a schematic diagram of the present application (without sealing cover);

[0030] Figure 4 Figure 6 is a schematic diagram of the present application (without sealing cover);

[0031] Figure 7 is a schematic diagram of the present application (with sealing cover); Figure 5 Figure 8 is a schematic diagram of the sealing cover of the present application;

[0032] Figure 6 Figure 9 is a schematic diagram of the sealing cover of the present application;

[0033] Figure 10 is a schematic diagram of the present application (without sealing cover); Figure 7 Figure 11 is a schematic diagram of the present application (without sealing cover);

[0034] Figure 1 is a schematic diagram of the present application (without sealing cover);

[0035] As shown in the figure, the artificial acoustic structure lens ultrasonic physiotherapy transducer, the ultrasonic output end of the transducer 2 is fixed at the positioning groove at the bottom end of the artificial acoustic structure lens, and the ultrasonic output end is closely attached to the artificial acoustic structure lens; the output end of the artificial acoustic structure lens is distributed with an annular groove; the annular groove is filled with epoxy resin 4, and the filling height of the epoxy resin between different regions of the filling area is different; the artificial acoustic structure lens uses the epoxy resin filled in the annular groove as a phase adjusting medium, adjusts the phase delay of the ultrasonic by changing the filling height proportion of the phase adjusting medium in the annular groove, and changes the focal point position of the artificial acoustic structure lens.

[0036] The transducer is a circular transducer, the artificial acoustic structure lens takes nylon as the base body, the annular groove is a filling medium groove 3 on the nylon base body 1, the nylon base body groove is covered with a sealing cover 6 of nylon material, and a water layer is formed between the nylon base body groove and the sealing cover by injecting water 5, which is used to alleviate the heating problem of the contact surface under long-term use.

[0037] The method for adjusting the focal depth of the artificial acoustic structure lens ultrasonic physiotherapy transducer adjusts the focal depth of the artificial acoustic structure lens by filling epoxy resin with different height proportions, and performs ultrasonic physiotherapy on different depth parts of the target; including the following steps:

[0038] ​​​​Step one, when using the artificial acoustic structure lens, first inject epoxy resin into the nylon base groove as a medium for adjusting the phase delay;

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

[0040] Step three, attach the artificial acoustic structure lens to the ultrasonic physiotherapy transducer, adjust the ultrasonic phase to produce phase superposition at the focal point position, that is, use the interference effect of sound waves to improve the focal point sound energy and achieve ultrasonic focusing, and the sound energy is concentrated in front of the transducer, that is, a focal point is generated in front of the transducer.

[0041] Step four, adjust the focal point position depth by changing the filling medium height ratio of the artificial acoustic structure lens to achieve ultrasonic physiotherapy on different depth parts of the target area.

[0042] In step three, the method of adjusting the ultrasonic phase is to use 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.

[0043] The transducer is a circular transducer. In step four, when adjusting the focal point position depth, first divide the output surface of the transducer ultrasonic output end into multiple circular ring regions according to the predetermined radius distance, select the average value of the radii of two adjacent circular rings as the value of the circular ring region, and the value of each circular ring region is different. After setting the focal point position, if the distance from each circular ring region to the focal point is different, the phases of each circular ring region are different.

[0044] In step four, the acoustic lens base annular groove region of the artificial acoustic structure lens is adapted to the transducer division region, and the filling epoxy resin height in the groove is calculated by formula to achieve phase adjustment of the corresponding region.

[0045] In step four, the method of adjusting the focal point position depth is as follows:

[0046] Set the depth value of the focal point target position, that is, the F value, and calculate the phase value at different circle layer positions by the following formula 1 Then calculate the filling epoxy resin height by the following formula 2, and each circle layer has a corresponding filling epoxy resin height h;

[0047] Formula 1: Where F is the designed acoustic lens focal length, r is the radial position of the artificial acoustic structure lens circular ring, the frequency wavelength of the ultrasonic physiotherapy transducer; 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 of the background fluid at the height h.

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

[0050] In step two, after the installation of the sealing cover, the artificial acoustic structure lens has a structure feature that the height of the sealing cover is greater than the height of the acoustic lens, so that a positioning groove for installing the transducer appears at the bottom of the artificial acoustic structure lens, and the transducer is tightly attached to the artificial acoustic structure lens.

[0051] In step four, by controlling the position depth of the focal point, higher acoustic energy is generated at the focal point to optimize the ultrasonic physiotherapy effect at different depth positions.

[0052] The method can be used for the manipulation of acoustic particles, the delivery of drugs, and the excitation of drugs by changing the internal structure of the artificial acoustic structure lens to change the position of the focal point depth.

[0053] Embodiment:

[0054] The present example is aimed at the problem that the acoustic energy of the ultrasonic physiotherapy transducer acts on the skin surface and does not penetrate deeply into the skin. An artificial acoustic structure lens ultrasonic physiotherapy transducer is designed, which is composed of an artificial acoustic structure lens and an ultrasonic physiotherapy transducer and is a device for ultrasonic physiotherapy. The difference between the new ultrasonic physiotherapy transducer and the traditional ultrasonic physiotherapy transducer is that the phase of different regions of the ultrasonic physiotherapy transducer is adjusted by attaching an artificial acoustic structure lens to it, thereby improving the acoustic energy at the focal point position. At the same time, since the artificial acoustic structure lens can be adjusted, the position of the focal point depth can be changed by changing the internal structure of the artificial acoustic structure lens.

[0055] The present example adjusts the phase to cause phase superposition at the focal point position, uses the interference effect of acoustic waves to improve the focal point acoustic energy, and realizes ultrasonic focusing by converging acoustic energy in front of the transducer, i.e., generating a focal point in front of the transducer.

[0056] The present example uses nylon material as the matrix, with annular grooves distributed thereon for filling epoxy resins of different heights. The epoxy resin serves as a phase adjustment medium, and the phase delay of the ultrasonic wave is adjusted by changing the filling height ratio of the epoxy resin in the groove, thereby changing the focal point 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 sound structure lens is attached to the top of the ultrasonic therapy transducer, and the target depth is treated by ultrasonic therapy after focusing through the artificial sound structure lens. The focal depth can be changed by adjusting the filling height ratio of epoxy resin in the groove during use.

[0058] The artificial sound structure lens designed in this example can change the focal depth by filling different height ratios of epoxy resin to perform ultrasonic therapy on different depth parts. When using the lens, first inject epoxy resin into the nylon base groove as a medium to adjust the phase delay, then inject water on it to alleviate the heating problem of the contact surface during long-term use, and seal it with a sealing cover made of nylon.

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

Claims

1. An artificial acoustic structural lens ultrasound physiotherapy transducer, characterized in that: The ultrasonic output end of the transducer (2) is fixed to the positioning groove at the bottom of the artificial acoustic structure lens, and the ultrasonic output end is in close contact with the artificial acoustic structure lens; the output end of the artificial acoustic structure lens has annular grooves distributed therein; the annular grooves are filled with epoxy resin (4), and the epoxy resin filling height varies 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; the transducer 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. Includes the following steps; Step 1: When using an artificial acoustic structure lens, first inject epoxy resin into the groove of the nylon substrate as a medium to adjust the phase delay; Step 2: Inject water into the groove of the nylon substrate to reduce the heat generation problem at the contact surface between the lens and the target during long-term use, and then cover it with a sealing cap also made of nylon for sealing. Step 3: Attach the artificial acoustic structure lens above the ultrasound transducer. By adjusting the ultrasound phase, phase superposition is generated at the focal point. That is, the interference effect of sound waves is used to enhance the focal sound energy and achieve ultrasound focusing. The sound energy is then focused in front of the transducer, thus creating a focal point in front of the transducer. Step 4: Adjust the focal depth by changing the height ratio of the filling medium in the artificial acoustic structure lens to achieve ultrasound therapy at different depths of the target area; In step four, the method for adjusting the depth of the focus position is as follows: The depth value, or F-value, of the focal target position is set, and the phase value at different layers is calculated using the following formula 1. The height of the filled epoxy resin is then calculated using the following formula 2. Each layer has a corresponding height h of filled epoxy resin. 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 the frequency wavelength of the ultrasonic transducer; n is any 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 of the background fluid at the height h. Combining Formula 1 and Formula 2, the height h of the filling medium corresponding to the radial position r can be determined.

2. The artificial acoustic structured lens ultrasound physiotherapy transducer according to claim 1, characterized in that: The transducer is a circular transducer. The artificial sound structure lens is based on nylon. The annular groove is a filling medium groove (3) on the nylon substrate (1). A nylon sealing cap (6) is covered above the nylon substrate groove. A water layer is formed between the nylon substrate groove and the sealing cap by injecting water (5). The water layer is used to reduce the heat generation problem of the contact surface under long-term use.

3. The artificial acoustic structure lens ultrasound physiotherapy transducer according to claim 1, characterized in that: In step three, the method for adjusting the ultrasonic phase is to utilize the difference in sound velocity between the ultrasonic waves in epoxy resin and water, and to achieve phase adjustment by changing the height of the filled epoxy resin.

4. The artificial acoustic structure lens ultrasound physiotherapy transducer according to claim 3, characterized in that: The transducer is a circular transducer. In step four, when adjusting the depth of the focal position, the output surface of the ultrasonic output end of the transducer is first divided into multiple annular regions according to a predetermined radius distance. The average value of the radii of two adjacent annular regions is selected as the value of the annular region. The value of each annular region is different. After setting the focal position, if the distance from each annular region to the focal point is different, the phase of each annular region will be different.

5. The artificial acoustic structure lens ultrasound physiotherapy transducer according to claim 4, characterized in that: In step four, the annular groove area of ​​the acoustic lens substrate of the artificial acoustic structure lens is adapted to the transducer division area. The height of epoxy resin filling in the groove is calculated by formula to achieve phase adjustment in the corresponding area.

6. The artificial acoustic structured lens ultrasound physiotherapy transducer according to claim 1, characterized in that: In step two, after the sealing cover is installed, the artificial acoustic structure lens utilizes the structural feature that the height of the sealing cover is greater than the height of the acoustic lens to create a positioning groove at the bottom of the artificial acoustic structure lens for installing the transducer, thus tightly fitting the transducer to the artificial acoustic structure lens.

7. The artificial acoustic structured lens ultrasound physiotherapy transducer according to claim 1, characterized in that: In step four, by controlling the position and depth of the focal point, higher acoustic energy is generated at the focal point to optimize the ultrasound therapy effect at different depths.

8. The artificial acoustic structure lens ultrasound therapy transducer according to claim 7, characterized in that: The method alters the focal depth by changing the internal structure of the artificial acoustic structure lens, and can be used for manipulating acoustic particles with ultrasound, delivering drugs, and stimulating drugs.

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