Method and device for testing vibration performance of super milk needle

Abstract

The invention provides a method and device for testing the vibration performance of a super-emulsion needle, and relates to the technical field of detection equipment of medical instruments.The method for testing the vibration performance of the super-emulsion needle comprises the steps that S1, the tip of the vibrating super-emulsion needle is irradiated with laser, part of the laser is shielded by the tip of the vibrating super-emulsion needle, and part of the laser is not shielded; s2, acquiring the shielding condition of the laser by the tip of the super-emulsion needle; and S3, obtaining the vibration performance of the tip of the super milk needle according to the shielding condition.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology for medical devices, and in particular to a method and apparatus for testing the vibration performance of an phacoemulsification needle. Background Technology

[0002] Phacoemulsification is a key technology in the treatment of cataracts in ophthalmology. Its core component, the phaco tip, uses high-frequency longitudinal vibration to pulverize and emulsify the lens nucleus. The vibration performance of the phaco tip directly affects the efficiency and safety of the surgery; therefore, accurate measurement of its vibration characteristics is a crucial aspect of product quality control.

[0003] Currently, the testing of vibration performance of phacoemulsification needles in the industry is mainly divided into two categories: vibration frequency testing uses non-contact vibrometer or hydrophone method, and frequency acquisition is achieved through laser Doppler effect or sound pressure signal conversion; amplitude measurement relies on static observation with optical microscope, interference fringe analysis of laser vibrometer or piezoelectric ceramic feedback voltage conversion, and displacement data needs to be obtained through microscopic imaging system or optical path calibration device.

[0004] It is worth noting that among existing vibration frequency testing methods, laser vibrometer equipment costs over one million yuan and requires a professional vibration isolation environment, while the hydrophone method suffers from acoustic field interference. In amplitude measurement techniques, the optical microscope method requires pausing vibration for static photography, the laser vibrometer method is limited by the sampling frequency and struggles to capture transient amplitudes, and the feedback voltage method suffers from linearity errors due to the hysteresis effect of piezoelectric materials. These methods generally suffer from complex testing system setups, delayed data acquisition, and insufficient measurement consistency. Summary of the Invention

[0005] The purpose of this invention is to provide a method and apparatus for testing the vibration performance of phacoemulsification needles, so as to alleviate the technical problems of expensive testing equipment and inability to monitor vibration performance in real time in existing phacoemulsification needle testing.

[0006] In a first aspect, the present invention provides a method for testing the vibration performance of an phacoemulsification needle, comprising: Step S1. Use a laser to irradiate the tip of a vibrating phacoemulsification needle. The tip of the vibrating phacoemulsification needle will block part of the laser, while the part of the laser will not be blocked. Step S2. Obtain the extent to which the laser is blocked by the tip of the phacoemulsification needle; Step S3. Obtain the vibration performance of the tip of the phacoemulsification needle based on the occlusion situation.

[0007] Furthermore, the vibration performance includes the vibration frequency.

[0008] Furthermore, step S1 includes: Step S11. Align the laser spot with the tip of the stationary phacoemulsification needle, and ensure that the tip of the phacoemulsification needle completely blocks the laser spot; Step S12. Start the phacoemulsification needle, and the tip of the vibrating phacoemulsification needle periodically blocks the light spot.

[0009] Step S2 specifically includes the following steps: using a photodetector to detect the periodic changes in the laser light that is not blocked by the tip of the phacoemulsification needle, so as to obtain a periodically changing electrical signal.

[0010] Furthermore, the vibration performance includes amplitude.

[0011] Furthermore, step S1 includes: Step S11. Irradiate the tip of the stationary phacoemulsification needle with collimated parallel light, and the spot of the parallel light covers the vibration range of the tip of the phacoemulsification needle. Step S12. Start the phacoemulsification needle; Step S2 specifically includes the following steps: using a linear CMOS array to detect changes in the boundary position of the shadow of parallel light blocked by the tip of the phacoemulsification needle.

[0012] Secondly, the present invention provides a device for testing the vibration performance of an phacoemulsification needle, comprising: a laser light source, a fixing fixture, and an optical performance detection device; The fixing clamp is used to hold the phacoemulsification needle; The laser source is used to emit a laser beam toward the phacoemulsification needle; The optical performance detection device is located between the phacoemulsification needle and the laser source, and is used to obtain the extent to which the laser is blocked by the tip of the phacoemulsification needle.

[0013] Furthermore, the laser source includes a laser and an optical fiber connected thereto, wherein the diameter of the emitted light spot of the optical fiber is ≤50μm.

[0014] Furthermore, the optical performance detection device includes a photodetector, which detects the periodic changes in the laser light that is not blocked by the tip of the phacoemulsification needle during frequency testing to obtain a periodically changing electrical signal.

[0015] Furthermore, the laser source includes a laser and a collimating lens, the collimating lens being used to collimate the light emitted by the laser.

[0016] Furthermore, the optical performance detection device includes a linear CMOS array, which detects changes in the boundary position of the shadow of parallel light blocked by the tip of the phacoemulsification needle.

[0017] This invention has at least the following advantages or beneficial effects: The method for testing the vibration performance of an phacoemulsification needle provided by the present invention includes: step S1. irradiating the tip of a vibrating phacoemulsification needle with a laser, wherein the tip of the vibrating phacoemulsification needle partially blocks the laser, while the remaining portion of the laser is not blocked; step S2. obtaining the degree of laser blocking by the tip of the phacoemulsification needle; step S3. obtaining the vibration performance of the tip of the phacoemulsification needle based on the degree of blocking.

[0018] The phacoemulsification needle generates periodic vibrations during operation. When a laser beam illuminates the tip of the needle, the area where the light is blocked undergoes periodic deformation. The degree of laser obstruction reflects the needle's vibration. By detecting changes in the transmitted light, the vibrational performance of the phacoemulsification needle tip can be monitored in real time. The detection process requires only a laser source and a laser acquisition device, resulting in a simple detection structure, low cost, and real-time monitoring of the needle's vibration changes through the transmitted light after obstruction. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the vibration performance testing device for phacoemulsification needles provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the vibration performance testing device for phacoemulsification needles provided in Embodiment 2 of the present invention; Figure 3 This is a simulation diagram of the needle being in the extreme positive position during the longitudinal vibration frequency test in the phacoemulsification needle vibration performance testing method provided in Embodiment 1 of the present invention; Figure 4 This is a simulation diagram of the needle being in the initial 0 position during the longitudinal vibration frequency test in the phacoemulsification needle vibration performance testing method provided in Embodiment 1 of the present invention; Figure 5 This is a simulation diagram of the needle being in the extreme negative position during the longitudinal vibration frequency test in the phacoemulsification needle vibration performance testing method provided in Embodiment 1 of the present invention; Figure 6 This is an oscilloscope display during the longitudinal vibration frequency test in the ultrasonic needle vibration performance testing method provided in Embodiment 1 of the present invention; Figure 7 This is a simulation diagram of the needle being in the extreme positive position during the torsional vibration frequency test in the phacoemulsification needle vibration performance testing method provided in Embodiment 1 of the present invention; Figure 8This is a simulation diagram of the needle being in the initial 0 position during the torsional vibration frequency test in the phacoemulsification needle vibration performance testing method provided in Embodiment 1 of the present invention; Figure 9 This is a simulation diagram of the needle being in the extreme negative position during the torsional vibration frequency test in the phacoemulsification needle vibration performance testing method provided in Embodiment 1 of the present invention; Figure 10 This is an oscilloscope display during torsional vibration frequency testing in the ultrasonic needle vibration performance testing method provided in Embodiment 1 of the present invention; Figure 11 This is a simulation diagram of the phacoemulsification needle amplitude performance testing method provided in Embodiment 2 of the present invention; Figure 12 The result image displayed on the linear array CMOS in the method for testing the amplitude performance of the phacoemulsification needle provided in Embodiment 2 of the present invention; Figure 13 This is a schematic diagram of the amplitude tested in the phacoemulsification needle amplitude performance testing method provided in Embodiment 2 of the present invention.

[0021] Icons: 1-Laser; 2-Photodetector; 3-Collimating lens; 4-Oscilloscope; 5-Linear array CMOS; 6-Pulsation needle; 7-Signal processor. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Example 1 like Figure 1 As shown, the method for testing the vibration performance of an phacoemulsification needle provided by the present invention includes: step S1. irradiating the tip of a vibrating phacoemulsification needle 6 with a laser, wherein the tip of the vibrating phacoemulsification needle 6 blocks part of the laser and leaves part of the laser unblocked; step S2. obtaining the blocking status of the laser by the tip of the phacoemulsification needle 6; step S3. obtaining the vibration performance of the tip of the phacoemulsification needle 6 based on the blocking status.

[0029] The phacoemulsification needle 6 generates periodic vibrations during operation. When laser light shines on the tip of the needle, the area where the light is blocked at the tip undergoes periodic deformation. The degree of laser blocking reflects the vibration of the needle. By detecting changes in the transmitted light, the vibration performance of the tip of the phacoemulsification needle 6 can be reflected in real time. The detection process only requires a laser source and a laser acquisition device, resulting in a simple detection structure, low detection cost, and real-time monitoring of the needle vibration changes through the transmitted light after blocking.

[0030] In this embodiment, the vibration performance includes the vibration frequency, meaning the method and corresponding device can detect the vibration frequency of the needle. Specifically, the method is implemented using the following device: The testing apparatus includes: a laser source, a fixture, and optical performance testing devices.

[0031] The laser source includes a laser 1 and an optical fiber connected to it. The fiber core diameter is small, resulting in a small light spot. The smaller the light spot, the better; preferably, the light spot diameter is ≤50μm. With the microemulsification needle 6 operating at a relatively small amplitude, the beam can be blocked or allowed to pass through, allowing the vibration frequency of the needle, which vibrates with a very small amplitude (below 100μm), to be tested.

[0032] The fixing clamp is used to hold the phacoemulsification needle 6 and serves to fix it in place. The clamp is an existing clamping tool. The clamp can hold or release the needle, so that after the longitudinal vibration tip test, the needle can be rotated 90° to perform the torsional vibration tip test.

[0033] The fixture for the phacoemulsification needle 6 is easy to rotate, allowing for quick and easy adjustment to ensure the incident light is perpendicular to the needle's vibration direction. The light source clamping fixture is adjustable in three dimensions, facilitating rapid alignment of the light with the tip of the phacoemulsification needle 6 and quick positioning of the light spot relative to the needle.

[0034] The optical performance detection device is located between the phacoemulsification needle 6 and the laser source, and is used to obtain the extent to which the laser is blocked by the tip of the phacoemulsification needle 6.

[0035] In this embodiment, the optical performance detection device includes a photodetector 2. The photodetector 2 detects the periodic changes of the laser that is not blocked by the tip of the phacoemulsification needle 6 during frequency testing to obtain a periodically changing electrical signal.

[0036] like Figures 3-6 As shown in Table 1, during the longitudinal vibration test of the needle tip, the tip periodically changes between the extreme positive position, the initial 0 position, and the extreme negative position. The energy change detected by the photodetector 2 is shown in Table 1, and the curve displayed on the oscilloscope 4 is shown in Table 4. Figure 6 As shown.

[0037] Table 1

[0038] like Figures 7-10 As shown, similarly, during the needle tip torsional vibration test, the tip periodically changes between the extreme positive position, the initial 0 position, and the extreme negative position. The energy change detected by photodetector 2 is shown in Table 2, and the curve displayed on oscilloscope 4 is as follows. Figure 10 As shown.

[0039] Table 2

[0040] The laser generated by laser 1 is transmitted through a small-core optical fiber and irradiated onto the tip of the phacoemulsification needle 6. As the phacoemulsification needle 6 vibrates, the amount of light irradiated onto the photodetector 2 varies periodically with the vibration frequency, meaning that sometimes the light spot is blocked by the tip, and sometimes it irradiates the photodetector 2. This periodic variation is the blocking situation. The optical performance testing device can also include an oscilloscope 4. By connecting the signal detected by the photodetector 2 to the oscilloscope 4, the longitudinal and torsional vibration frequencies of the phacoemulsification handle can be displayed in real time. This solution is low-cost, easy to operate, and has been proven feasible in practice.

[0041] Example 2 like Figure 2 As shown, the difference from Example 1 is that the method and apparatus in this example can detect the amplitude of the needle tip.

[0042] The testing equipment also includes: a laser source, a fixture, and optical performance testing devices.

[0043] The fixing fixture is the same as in Example 1.

[0044] The laser source includes a laser 1 and a collimating lens 3. The collimating lens 3 is used to collimate the light emitted by the laser 1, thereby forming parallel light. When the phacoemulsification needle 6 is illuminated with parallel light, the change in the position of the beam boundary of the phacoemulsification needle 6 under parallel light illumination is consistent with the change in the position projected onto the high-speed linear array COMs, eliminating the need for position calibration.

[0045] The optical performance detection device includes a linear CMOS 5 array. For example, a high-speed linear CMOS 5 array with a small range (length within 10 mm) and a response speed greater than the vibration frequency can obtain high-precision test results. The linear CMOS 5 array detects changes in the boundary position of the shadow cast by parallel light blocked by the tip of the phacoemulsification needle 6.

[0046] The optical performance testing device also includes a signal processor 7 connected to the linear array CMOS 5, which is used to convert the position changes of the light collected by the high-speed linear array CMOS into amplitude test results.

[0047] After the laser generated by laser 1 is aligned, it forms parallel light. The parallel light is irradiated onto the tip of the phacoemulsification needle 6. When the phacoemulsification needle 6 vibrates, the boundary of the light irradiated onto the high-speed linear array CMOS also changes with the amplitude as the amplitude changes. The amplitude of the phacoemulsification needle 6 can be displayed in real time. This solution is low in cost, easy to operate, and can accurately test the amplitude of the phacoemulsification needle 6.

[0048] like Figures 11-13 As shown, specifically, during the test, the amplitude of the phacoemulsification needle 6 can be measured by sampling 30 pixels corresponding to the amplitude range of the phacoemulsification needle 6 during vibration.

[0049] If calibration is required, a thin blade can be placed at position 6 of the phacoemulsification needle for calibration. During calibration, the movement distance of the blade needs to be precisely controlled (accuracy ≤ 5 μm).

[0050] In summary, the solutions in Examples 1 and 2 use a low-cost method to accurately test the tip frequency and amplitude of the phacoemulsification needle 6, thus solving the problems of production process control and quality control of phacoemulsification product performance.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for testing the vibration performance of an phacoemulsification needle, characterized in that, include: Step S1. Use laser to irradiate the tip of the vibrating phacoemulsification needle (6). The tip of the vibrating phacoemulsification needle (6) will block part of the laser, while part of the laser will not be blocked. Step S2. Obtain the extent to which the laser is blocked by the tip of the phacoemulsification needle (6); Step S3. Obtain the vibration performance of the tip of the phacoemulsification needle (6) based on the occlusion situation.

2. The method for testing the vibration performance of an phacoemulsification needle according to claim 1, characterized in that, The vibration performance includes the vibration frequency.

3. The method for testing the vibration performance of the phacoemulsification needle according to claim 2, characterized in that, Step S1 includes: Step S11. Align the laser spot with the tip of the stationary phacoemulsification needle (6), and the tip of the phacoemulsification needle (6) completely blocks the laser spot; Step S12. Start the phacoemulsification needle (6), and the tip of the vibrating phacoemulsification needle (6) periodically blocks the light spot; The specific steps of step S2 include: using a photodetector (2) to detect the periodic changes of the laser that is not blocked by the tip of the phacoemulsification needle (6) to obtain periodically changing electrical signals.

4. The method for testing the vibration performance of the phacoemulsification needle according to claim 3, characterized in that, The vibration performance includes amplitude.

5. The method for testing the vibration performance of an phacoemulsification needle according to claim 4, characterized in that, Step S1 includes: Step S11. Irradiate the tip of the stationary phacoemulsification needle (6) with collimated parallel light, and the spot of the parallel light covers the vibration range of the tip of the phacoemulsification needle (6). Step S12. Start the phacoemulsification needle (6); The specific steps of step S2 include: using a linear array COMS (5) to detect the change in the boundary position of the shadow of the parallel light blocked by the tip of the phacoemulsification needle (6).

6. A device for testing the vibration performance of an emulsification needle (6), characterized in that, Includes: laser light source, fixture, and optical performance testing devices; The fixing clamp is used to hold the phacoemulsification needle (6); The laser source is used to emit laser light toward the phacoemulsification needle (6); The optical performance detection device is located between the phacoemulsification needle (6) and the laser source, and is used to obtain the extent to which the laser is blocked by the tip of the phacoemulsification needle (6).

7. The vibration performance testing device for the phacoemulsification needle (6) according to claim 6, characterized in that, The laser source includes a laser (1) and an optical fiber connected thereto, wherein the diameter of the emitted light spot of the optical fiber is ≤50μm.

8. The vibration performance testing device for the phacoemulsification needle (6) according to claim 7, characterized in that, The optical performance detection device includes a photodetector (2), which detects the periodic changes of the laser that is not blocked by the tip of the phacoemulsification needle (6) during frequency testing to obtain a periodically changing electrical signal.

9. The vibration performance testing device for the phacoemulsification needle (6) according to claim 6, characterized in that, The laser source includes a laser (1) and a collimating lens (3), the collimating lens (3) being used to collimate the light emitted by the laser (1).

10. The vibration performance testing device for the phacoemulsification needle (6) according to claim 9, characterized in that, The optical performance detection device includes a linear COMS (5), which detects the change in the boundary position of the shadow of parallel light blocked by the tip of the phacoemulsification needle (6).

Images