Device for testing electrical performance of main electrode of artificial cochlea

Abstract

The utility model relates to an artificial cochlea main electrode electrical performance test device comprising a flexible test pen (1); the first multi-throw change-over switch (2) is respectively connected with each electrode ring (4) of the artificial cochlea main electrode (3) to be tested; the load resistance circuit is respectively connected with the first multi-throw change-over switch (2) and a power supply; and the conversion and display circuit is connected with the load resistance circuit and enables the flexible test pen (1) to be in contact with an electrode ring to be tested in the test process, the power supply, the load resistance circuit, the first multi-throw change-over switch (2), the flexible test pen (1), the electrode ring to be tested and the conversion and display circuit form a loop, and a test result is displayed on the conversion and display circuit. Compared with the prior art, the testing device has the advantages of convenience in testing, low damage probability of the electrode ring, convenience in load resistor switching and the like.

Description

Technical Field

[0001] The utility model relates to the field of electrical performance testing, in particular to an electrical performance testing device for the main electrode of a cochlear implant. Background Art

[0002] The main electrode of a cochlear implant has the characteristics of high integration and high density of electrode ring distribution. The electrode rings are usually distributed at the end of the main electrode in a relatively dense manner. How to realize the electrical performance testing of the main electrode of a cochlear implant is an urgent problem to be solved.

[0003] The existing main electrodes of cochlear implants generally only use a digital multimeter to test the connection, disconnection and matching of the electrode rings and the lead wires; this method has a slow testing speed and is easy to damage the main electrode.

[0004] In the prior art, a test platform for a chip system is provided, including: a wafer stage on which a chip to be tested is arranged; at least one test socket mounted on the wafer stage; an adapter board electrically connected to the test socket and a test circuit; wherein, after the chip to be tested operates according to a driving signal, the test socket is electrically connected to the chip to be tested through a probe or a bonding wire, and the test circuit collects and measures the electrical performance parameters of the chip to be tested through the adapter board. However, this type of test platform cannot be applied to the main electrode of a cochlear implant and has the problem of high cost.

[0005] In summary, how to realize the rapid testing of the electrical performance of the main electrode of a cochlear implant and how to reduce the possibility of damage to the main electrode caused by testing are urgent problems to be solved. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the above-mentioned defects existing in the prior art and provide an electrical performance testing device for the main electrode of a cochlear implant to solve or partially solve the problems of inconvenient electrical testing of the main electrode of a cochlear implant and / or high possibility of damage to the main electrode caused by testing.

[0007] The purpose of the utility model can be realized by the following technical solutions:

[0008] The utility model provides an electrical performance testing device for the main electrode of a cochlear implant, including:

[0009] A flexible test pen;

[0010] A first multi-throw switch, which is respectively connected to each electrode ring of the main electrode of the cochlear implant to be tested;

[0011] A load resistance circuit, which is respectively connected to the first multi-throw switch and a power supply;

[0012] A conversion and display circuit, which is connected to the load resistance circuit.

[0013] As a preferred technical solution, the flexible test pen includes:

[0014] A test pen shaft, including a clamping portion and a test needle fixing portion;

[0015] A flexible test needle, disposed on the test needle fixing portion, and during the test, the flexible test needle is connected to the electrode ring of the cochlear implant main electrode to be tested.

[0016] During the test, the flexible test pen is brought into contact with the electrode ring to be tested, and the power supply, the load resistance circuit, the first multi-throw switch, the flexible test pen, the cochlear implant main electrode to be tested, and the conversion and display circuit form a loop, and the test result is displayed in the conversion and display circuit.

[0017] As a preferred technical solution, the connection between the clamping portion and the test needle fixing portion is detachable.

[0018] As a preferred technical solution, the test needle fixing portion includes a through hole, and the flexible test needle is fitted with the through hole.

[0019] As a preferred technical solution, the surface of the flexible test needle is treated with smoothness and wear resistance.

[0020] As a preferred technical solution, the diameter of the flexible test needle is 0.1 - 0.5 mm, and the length is 20 - 100 mm.

[0021] As a preferred technical solution, the load resistance circuit includes:

[0022] A second multi-throw switch, the common terminal of which is connected to the common terminal of the first multi-throw switch;

[0023] A plurality of load resistors arranged in parallel, one side of which is respectively connected to the selected terminals of the second multi-throw switch, and the other side is connected to the conversion and display circuit.

[0024] As a preferred technical solution, the conversion and display circuit includes:

[0025] An operational amplifier, the non-inverting input terminal of which is connected to the common terminal of the first multi-throw switch, and the inverting input terminal is connected to the load resistance circuit and the power supply;

[0026] An analog-to-digital converter, connected to the output terminal of the operational amplifier;

[0027] A display element, connected to the analog-to-digital converter.

[0028] As a preferred technical solution, the display element includes an LED lamp, and / or a digital tube, and / or a display screen.

[0029] As a preferred technical solution, the diameter of the electrode ring is 0.1 - 1 mm, and the width is 0.1 - 0.5 mm.

[0030] Compared with the prior art, the present utility model has at least one of the following beneficial effects:

[0031] (1) The main electrode of the cochlear implant is convenient to test: Aiming at the problem of slow testing speed of the current electrical pen, during the testing process of the present utility model, the flexible testing pen is brought into contact with the electrode ring to be tested, and a loop is formed by the power supply, load resistance circuit, first multi-throw switch, flexible testing, electrode to be tested, and conversion and display circuit. Finally, the test result is displayed in the conversion and display circuit. By adjusting the first multi-throw switch, different electrode rings can be switched, thus simplifying the testing process and improving the testing speed.

[0032] (2) The probability of electrode ring damage is low: Aiming at the problem that the multimeter is easy to damage the electrode ring during testing, the present utility model reduces the possibility of the testing pen damaging the electrode ring by using a flexible testing pen. The testing pen has a replaceable test needle structure, which is convenient for use and maintenance. Moreover, the test needle is specially treated, with a smooth and wear-resistant surface. Under the maximum deformation condition where the needle pressure is equal to the outer diameter of the main electrode, the main electrode will not be damaged.

[0033] (3) The load resistance can be switched conveniently: By setting the second multi-throw switch, different load resistances can be switched conveniently for testing, further simplifying the testing process. Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the circuit in the main electrode electrical performance testing device of the cochlear implant in the embodiment;

[0035] Figure 2 It is the top view and front view of the flexible testing pen in the embodiment,

[0036] wherein, 1. Flexible testing pen, 101. Testing pen rod, 1011. Clamping part, 1012. Test needle fixing part, 1013. Through hole, 102. Flexible test needle, 2. First multi-throw switch, 3. Main electrode of the cochlear implant, 4. Electrode ring, 5. Second multi-throw switch, 6. Load resistance, 7. Operational amplifier, 8. Analog-to-digital converter, 9. Display element. Detailed Embodiments

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0040] Embodiment 1

[0041] In view of the problems existing in the foregoing prior art, this embodiment provides an artificial cochlear main electrode electrical performance testing device. Refer to Figure 1 , the device mainly includes:

[0042] A flexible test pen 1, the surface of which is treated with smooth wear resistance, is used to select the electrode ring on the artificial cochlear main electrode to be tested. Further, the flexible test pen 1 includes a test pen rod 101 and a flexible test needle 102. The test pen rod 101 includes a clamping portion 1011 and a test needle fixing portion 1012. The flexible test needle 102 is arranged on the test needle fixing portion 1012; the test needle fixing portion 1012 includes a through hole 1013, and the flexible test needle 102 cooperates with the through hole 1013. During the test, the flexible test needle 102 is connected to the electrode ring 4 of the artificial cochlear main electrode 3 to be tested. Further, the clamping portion 1011 and the test needle fixing portion 1012 are detachably connected, and the flexible test needle 102 and the flexible test pen 1 body are also detachably connected. The diameter of the electrode ring 4 is 0.1 - 1 mm, the width is 0.1 - 0.5 mm, the diameter of the flexible test needle 102 is 0.1 - 0.5 mm, and the length is 20 - 100 mm. Preferably, in this embodiment, the diameter of the electrode ring is 0.6 mm, the width is 0.3 mm, the diameter of the flexible test needle is 0.25 mm, and the length is 40 mm.

[0043] The first multi-throw switch 2 is respectively connected to each electrode ring 4 of the cochlear implant main electrode 3 to be tested. During the test, by switching the switch to the position corresponding to the electrode ring to be tested, on the one hand, it can prevent the flexible test pen 1 from measuring the wrong electrode ring 4, and on the other hand, it can avoid inaccurate test results caused by collecting data when the flexible test pen 1 contacts multiple electrode rings.

[0044] A load resistance circuit is respectively connected to the first multi-throw switch 2 and the power supply, and is used to select the load resistance according to the test requirements. Further, the load resistance circuit includes a second multi-throw switch 5 and a plurality of load resistors 6 arranged in parallel. Among them, the common terminal of the second multi-throw switch 5 is connected to the common terminal of the first multi-throw switch 2. One side of the load resistor 6 is respectively connected to the selected terminal of the second multi-throw switch 5, and the other side is connected to the conversion and display circuit and the power supply. In this embodiment, the load resistors include resistors of 1K, 2K,..., 20K, and 2.5M. Through the second multi-throw switch 5 ( Figure 1 labeled as K1) for switching, it serves as a test load, and 2.5M is used for the measurement of the interelectrode insulation resistance.

[0045] The conversion and display circuit is connected to the load resistance circuit and is used to convert and display the measurement results. Further, the conversion and display circuit includes an operational amplifier 7, an analog-to-digital converter 8, and a display element 9. Among them, the non-inverting input terminal of the operational amplifier 7 is connected to the common terminal of the first multi-throw switch 2, the inverting input terminal is connected to the load resistance circuit, the analog-to-digital converter 8 is connected to the output terminal of the operational amplifier 7, and the display element 9 is connected to the analog-to-digital converter 8. The display element 9 can be an LED lamp, a digital tube, a display screen, or a combination of multiple of the above components.

[0046] In this embodiment, the multi-throw switch is a micro measurement relay, which is driven by a drive circuit. Its specifications are:

[0047] (1) Resistance when the contact is conducting: less than or equal to 50 mΩ.

[0048] (2) Resistance when the contact is off: greater than or equal to 1000 MΩ.

[0049] (3) Contact electrical characteristics: minimum capacity: 10 μA / 10 mV, maximum capacity: 1 A / 110 V.

[0050] (4) Service life: Under the condition of 1 A / 110 V (maximum capacity), the contact is turned off and on 100 million times.

[0051] (5) Working environment: -40°C to 75°C.

[0052] It can meet the test requirements of the main electrode.

[0053] Before the formal measurement, each electrode ring at one end of the main electrode needs to be connected to the first multi-throw switch 2. The main electrode has 22 electrode leads, which are randomly positioned on the PADs from D1 to D22 of the test module. During the test, the test of the electrode rings in the main electrode and the number matching are completed by switching the first multi-throw switch 2 ( Figure 1 labeled DJ2 in the figure).

[0054] During the test, the flexible test pen 1 is made to contact the electrode ring at the other end of the main electrode to be tested. The power supply, load resistance circuit, first multi-throw switch 2, flexible test pen 1, the electrode to be tested, and the conversion and display circuit form a loop. The operational amplifier 7 amplifies the current and then converts it through the analog-to-digital converter, and finally the test result is displayed on the display element 9.

[0055] See Figure 2 For the schematic diagram of the flexible test pen 1 during the test process, where (a) is the top view and (b) is the front view. The rigidity of the test needle is selected according to the process requirements of the implant main electrode to ensure that when the test needle clicks, the main electrode or the electrode ring will not be irreversibly damaged when bearing the maximum needle pressure. It should be noted that the maximum needle pressure of the test needle appears when the "test needle bending point" touches the test tray. At this time, the two sides of the test needle bend upwards, and the contact with the electrode ring is good, and the contact resistance is the smallest, less than 1Ω. Figure 2 In the figure, label A indicates that the test needle has pressed to the bending point of the test tray.

[0056] Embodiment 2

[0057] Based on Embodiment 1, in this embodiment, the analog-to-digital converter 8 is implemented by using an existing controller with analog-to-digital conversion function. The controller can adopt the MCU control module, PLC industrial control module, etc. that have been maturely and widely applied in the existing technology, or other control modules in the existing technology that can implement the control function and are suitable for this embodiment for control can be purchased and applied. In this embodiment, the MCU control module is adopted to implement.

[0058] The MCU control module configures the working logic by using the existing method, so that the test equipment can not only measure the current, but also measure the on, off, short circuit, and inter-electrode insulation resistance.

[0059] It should be noted that in the present invention, the MCU control module is implemented by using commercially available products and does not involve improvements in methods.

[0060] As described above, it is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. An electrical performance testing device for the main electrode of a cochlear implant, characterized in that, Comprising: A flexible test pen (1); A first multi-throw switch (2), respectively connected to each electrode ring (4) of the cochlear implant main electrode (3) to be tested; A load resistance circuit, respectively connected to the first multi-throw switch (2) and the power supply; A conversion and display circuit, connected to the load resistance circuit, During the test, the flexible test pen (1) is brought into contact with the electrode ring to be tested, and the power supply, the load resistance circuit, the first multi-throw switch (2), the flexible test pen (1), the cochlear implant main electrode (3) to be tested, and the conversion and display circuit form a loop, and the test result is displayed in the conversion and display circuit.

2. The cochlear implant main electrode electrical performance testing device according to claim 1, characterized in that, The flexible test pen (1) comprises: A test pen rod (101), including a clamping portion (1011) and a test needle fixing portion (1012); A flexible test needle (102), arranged on the test needle fixing portion (1012), and during the test, the flexible test needle (102) is connected to the electrode ring (4) of the cochlear implant main electrode (3) to be tested.

3. The cochlear implant main electrode electrical performance testing device according to claim 2, wherein, The connection between the clamping portion (1011) and the test needle fixing portion (1012) is detachable.

4. The cochlear implant main electrode electrical performance testing device according to claim 2, wherein The test needle fixing portion (1012) includes a through hole (1013), and the flexible test needle (102) cooperates with the through hole (1013).

5. An electrical property testing device for the main electrode of a cochlear implant according to claim 2, characterized in that, The surface of the flexible test needle (102) is treated with smooth wear resistance.

6. The cochlear implant main electrode electrical performance testing device according to claim 2, characterized in that, The diameter of the flexible test needle (102) is 0.1 - 0.5 mm, and the length is 20 - 100 mm.

7. An electrical property testing device for the main electrode of a cochlear implant according to claim 1, characterized in that, The load resistance circuit comprises: A second multi-throw switch (5), the common end of which is connected to the common end of the first multi-throw switch (2); A plurality of load resistors (6) arranged in parallel, one side of which is respectively connected to the selected terminals of the second multi-throw switch (5), and the other side is connected to the conversion and display circuit and the power supply.

8. An electrical property testing device for the main electrode of a cochlear implant according to claim 1, characterized in that, The conversion and display circuit comprises: An operational amplifier (7), the non-inverting input terminal of which is connected to the common end of the first multi-throw switch (2), and the inverting input terminal of which is connected to the load resistance circuit; An analog-to-digital converter (8), connected to the output terminal of the operational amplifier (7); A display element (9), connected to the analog-to-digital converter (8).

9. An electrical property testing device for a cochlear implant main electrode according to claim 8, characterized in that, The display element (9) includes an LED lamp, and / or a digital tube, and / or a display screen.

10. The cochlear implant main electrode electrical performance testing device according to claim 1, characterized in that, The diameter of the electrode ring (4) is 0.1 - 1 mm, and the width is 0.1 - 0.5 mm.

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