CN115134732A - Narrow-band communication simulation mastoid for bone vibration test - Google Patents

Abstract

The invention relates to a narrow-band communication simulated mastoid for bone vibration test, comprising a force applying module, a base and a force coupler; the force applying module comprises a lifting bracket and a pressing arm; the pressing arm is arranged horizontally; The second end, the first end is fixedly connected with the lifting bracket, and the second end is used to fix the sample to be tested; the force coupler includes a coupler body and a skin simulation element, a mastoid simulation element and a force sensor arranged in the coupler body; The skin simulation element is arranged on the top of the coupler body, and together with the second end of the pressing arm, the sample to be tested is fixed; the force sensor and the mastoid simulation element are arranged under the skin simulation element in sequence, and the quality of the mastoid simulation element is consistent with the quality of the human skull; The base is fixed to the bottom of the force coupler and the lifting bracket. The device can accurately simulate the force-impedance characteristics of the mastoid part of the human body, and can replace the real human body to complete the bone vibration test of the finished bone conduction hearing aid, the finished bone conduction earphone and the vibrator unit.

Description

A Narrowband Communication Simulation Mastoid for Bone Vibration Testing

technical field

The invention relates to the field of bone vibration testing, in particular to a narrow-band communication simulated mastoid used for bone vibration testing.

Background technique

Hearing loss is a very common problem, and this phenomenon is more pronounced in the elderly population. Generally speaking, air conduction hearing aids are selected to improve hearing ability. However, there are some patients with sequelae of otitis media, otosclerosis, external auditory canal stenosis caused by trauma, and other patients who are not suitable for using air conduction hearing aids. Such people can only use bone conduction hearing aids.

The principle of the bone conduction hearing aid is to transmit the sound signal to the mastoid part of the human body in the form of vibration through the vibrator, and directly transmit it to the inner ear through the skull without passing through the outer ear and middle ear.

At present, the complete set of testing equipment for bone conduction hearing aids is composed of a closed sound insulation box (including sounding horn), force coupler, data processor and display screen. During the test, the bone conduction hearing aid should be placed in the sound insulation box. The internal sounding horn emits a certain frequency of sound as the sound input of the bone conduction hearing aid. After the bone conduction hearing aid collects the sound signal through the microphone, it is amplified and converted into mechanical motion by the bone vibrator. The bone vibrator exerts a certain dynamic force on the probe of the force coupler, and the two are pressed together. The force coupler receives the mechanical vibration of the bone oscillator, and then converts the vibration signal into a voltage signal and transmits it to the data processor. The data processor performs data processing. Analyze and display the sound performance index of the bone conduction hearing aid through the display screen.

However, the existing force coupler cannot simulate the force impedance characteristic of the mastoid part of the skull, which directly affects the output effect and accuracy of the test index.

In addition, sometimes it is necessary to achieve some special test requirements, such as the need to test a large number of sound performance indicators of bone conduction hearing aids under the action of different sizes of dynamic forces, and to study the design parameters of the head clamping force of bone conduction hearing aids. method is difficult to achieve these special requirements.

SUMMARY OF THE INVENTION

The invention discloses a narrow-band communication simulated mastoid for bone vibration test, aiming at solving the technical problems existing in the prior art.

The present invention adopts following technical scheme:

The application provides a narrow-band communication simulated mastoid for bone vibration test, including a force applying module, a base and a force coupler;

The force applying module includes a lifting bracket and a pressing arm; the pressing arm is arranged horizontally and is used for installing weights and providing pressure in the vertical direction; the pressing arm includes a first end and a second end, the first end is fixedly connected with the lifting bracket, and the second The two ends are used to fix the sample to be tested;

The force coupler comprises a coupler body and a skin simulation element, a mastoid simulation element and a force sensor arranged in the coupler body; the skin simulation element is arranged on the top of the coupler body, and fixes the sample to be tested together with the second end of the pressure arm; The force sensor and the mastoid simulation element are sequentially arranged below the skin simulation element, and the quality of the mastoid simulation element is consistent with the quality of the human skull;

The base is fixed to the bottom of the force coupler and the lifting bracket.

As a preferred technical solution, the second end of the pressing arm includes a pair of vertical and parallel downwardly arranged support arms, and a buffer element is provided under the two support arms, and the buffer element is used to fix the sample to be tested.

As a preferred technical solution, the buffer element includes shock-absorbing rubber.

As a preferred technical solution, a weight fixing piece is arranged between the first end and the second end of the pressing arm, and the weight fixing piece is arranged vertically downward.

As a preferred technical solution, the coupler body includes sound insulation material.

As a preferred technical solution, the coupler body includes an SMA interface, and the SMA interface is connected to the force sensor.

As a preferred technical solution, the skin simulation element includes a vibration-transmitting rubber pad, and the vibration-transmitting rubber pad is used to transmit the vibration generated by the component to be measured into the force sensor; the vibration-transmitting rubber pad corresponds to the position of the buffer element.

As a preferred technical solution, the mastoid simulation element includes a weight block with a mass of 3.5kg.

As a preferred technical solution, both the lifting bracket and the coupler body are vertically arranged on the base.

As a preferred technical solution, the bottom of the base is provided with at least four shock absorbing elements.

The technical scheme adopted in the present invention can achieve the following beneficial effects:

The invention provides a narrow-band communication simulation mastoid for bone vibration test. The device can accurately simulate the force-impedance characteristics of the mastoid part of the human body, and can replace the real human body to complete the bone vibration test; through the device, the bone vibration can be tested. The finished hearing aids, the finished bone conduction earphones and the vibrator unit have two designs for the pressure arm to adjust the static pressure, which can not only meet a variety of static pressure experiments in the laboratory, but also meet the needs of the production line or QC end to fix the static pressure. Test consistency multiple times.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments, which constitute a part of the present invention, and the exemplary embodiments of the present invention and their descriptions explain the present invention. , does not constitute an improper limitation of the present invention. In the attached image:

1 is a perspective view of a narrow-band communication simulated mastoid used for bone vibration testing in a preferred embodiment disclosed in Example 1 of the present invention;

2 is a top view of a narrow-band communication simulated mastoid used for bone vibration testing in a preferred embodiment disclosed in Embodiment 1 of the present invention;

3 is a cross-sectional view of a force coupler in a preferred embodiment disclosed in Embodiment 1 of the present invention;

Description of reference numbers:

Force application module 10, lifting bracket 11, pressing arm 12, support arm 13, buffer element 14, level 15, tension spring fixing part 16; force coupler 20, coupler body 21, SMA interface 22, skin simulation element 23, breast Protruding simulation element 24, force sensor 25; base 30, damping spring 31; tension spring 40.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is generally used in its sense including "and/or" unless the content clearly dictates otherwise.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations. In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to solve the problems existing in the prior art, the embodiment of the present application provides a narrow-band communication simulated mastoid for bone vibration test, which includes a force applying module, a base and a force coupler; the force applying module includes a lifting bracket and a pressing arm. ; The pressing arm is set horizontally to install weights and provide pressure in the vertical direction; the pressing arm includes a first end and a second end, the first end is fixedly connected with the lifting bracket, and the second end is used to fix the sample to be tested; The force coupler comprises a coupler body and a skin simulation element, a mastoid simulation element and a force sensor arranged in the coupler body; the skin simulation element is arranged on the top of the coupler body, and fixes the sample to be tested together with the second end of the pressure arm; The force sensor and the mastoid simulation element are arranged below the skin simulation element in turn, the quality of the mastoid simulation element is consistent with the quality of the human skull; the base is fixed on the bottom of the force coupler and the lifting bracket.

Example 1

At present, when testing bone conduction earphones or bone conduction hearing aids, the pressure rod needs to apply a certain static force to the bone vibrator, and some use the method of weighting the pressure rod, and it is necessary to manually adjust the weight of the weight to achieve different sizes of application There is man-made operation error, and the accuracy cannot be guaranteed; there is also the method of adjusting the spring, the spring is very sensitive to the displacement, when the bone vibrator vibrates or there is an error in the equipment assembly, the position of the force surface of the bone vibrator on the probe is prone to change, causing The change of the spring force makes it impossible to obtain a precise and constant static force. In addition, the above two conventional methods cannot directly reflect the magnitude of the applied static force. The spring method needs to set the position according to the force in advance, which is very troublesome to operate, and the counterweight pressing rod method needs to measure the force with the help of a spring scale, and Static forces can only be applied in the vertical direction.

In addition, the existing force coupler 20 cannot simulate the force impedance characteristic of the mastoid part of the skull, which directly affects the output effect and accuracy of the test index.

Referring to FIGS. 1 to 3 , in order to solve the above problems, Embodiment 1 provides a narrow-band communication simulated mastoid for bone vibration test, including a force applying module 10 , a base 30 and a force coupler 20 .

The force applying module 10 includes a lifting bracket 11 and a pressing arm 12. The bottom of the lifting bracket 11 is vertically fixed on the base 30, and the upper end is fixed to the pressing arm 12. By adjusting its height, the height of the pressing arm 12 can be adjusted according to the test element or Change the weights.

Referring to FIG. 1 , in a preferred embodiment, the height of the lifting bracket 11 is adjusted by a knob. Those skilled in the art should understand that the lifting bracket 11 of other structures can be adjusted as long as the pressing arm 12 can move in the vertical direction. use, and will not be repeated here.

Preferably, in order to ensure the structural strength and stability of the lifting bracket 11, stainless steel is used.

Preferably, the pressing arm 12 is arranged horizontally, including a first end and a second end, wherein the first end is fixedly connected to the top of the lifting bracket 11 , and two supporting arms 13 are arranged below the second end, and the two supporting arms 13 are vertically arranged and They are parallel to each other, and a buffer element 14 is provided between the two support arms 13. Preferably, the buffer element 14 is made of shock-absorbing rubber; when testing the bone conduction earphone or bone conduction hearing aid, place the sample to be tested in the buffer Below the element 14, the sample to be tested is compressed by the buffer element 14, and simulates the elastic modulus of the bone conduction earphone or the bone conduction hearing aid when the skull mastoid is clamped.

In a preferred embodiment, a tension spring fixing member 16 is provided in the middle of the pressing arm 12, and the tension spring fixing member 16 is arranged vertically downward for installing the tension spring 40. The lower part of the tension spring 40 is connected with the base 30. By changing the The length of the tension spring 40 is used to adjust the vertical downward static pressure to ensure good contact between the sample to be tested and the coupler body 21; The static force provided to the pressing arm 12 is measured to simulate the clamping force of a bone conduction hearing aid or a bone conduction earphone.

In another preferred embodiment, weights of standard weight are directly placed on the upper part of the second end of the pressing arm 12, and the different clamping forces of bone conduction hearing aids or bone conduction earphones can be simulated by changing the number of weights. Ensure that the direction of the static force is vertical downward.

Preferably, a spirit level 15 is provided above the pressing arm 12 to ensure that the pressing arm 12 is always in a horizontal state during the test, so as to ensure the direction of the pressure and avoid errors in the test data.

Specifically, in order to accurately simulate the clamping force of bone conduction hearing aids or bone conduction earphones, whether a weight is installed on the upper part of the second end of the pressure arm 12 to provide pressure, or the tension spring 40 provides pressure, the static force generated by the two methods is the same. The adjustable range is 1.5N～10N.

Those skilled in the art should understand that since adjusting the tension spring 40 is more complicated than directly placing weights, the adjustment of the pressure value is more precise, so in the laboratory test, the tension spring 40 can be used to adjust the static force; At the production line or QC end, for higher test efficiency, a standard weight weight can be placed directly above the second end of the pressing arm 12 .

Preferably, the force coupler 20 includes a coupler body 21 , a skin simulation element 23 , a mastoid simulation element 24 and a force sensor 25 arranged in the coupler body 21 . On both sides, the two are parallel and vertically arranged, and the upper part of the coupler body 21 corresponds to the position of the second end of the pressing arm 12 .

In a preferred embodiment, the skin simulation element 23 is arranged on the top of the coupler body 21, and the sample to be measured is fixed together with the buffer element 14 at the second end of the pressing arm 12; the force sensor 25 and the mastoid are arranged under the skin simulation element 23 in sequence. The simulation element 24 is used to simulate the path of the bone conduction unit in the bone conduction earphone or the bone conduction hearing aid transmitting the vibration into the inner ear.

Preferably, the skin simulation element 23 is a vibration-transmitting rubber pad, which is made of two layers of composite rubber; the skin-simulating element 23 is used to simulate human skin contacting the bone conduction unit, and transmit the vibration generated by the bone conduction unit into force Sensor 25 ; preferably, the position of the vibration-transmitting rubber pad corresponds to the position of the buffer element 14 .

Preferably, there is also a tungsten steel force transmission head between the skin simulation element 23 and the force sensor 25, which is used to simulate the skull that the vibration generated by the bone conduction unit passes through the skin, and the force sensor 25 is used to simulate inner ear.

Preferably, the coupler body 21 includes an SMA interface 22, and the SMA interface 22 is connected to the force sensor 25, and is used to transmit the electrical signal generated by the force sensor 25 to a related analyzer.

Preferably, the mastoid simulation element 24 is a copper weight. Those skilled in the art should understand that the weight of an adult's head is about 4.5-5.5kg, and the weight of the brain tissue is about 1-1.5kg. In a preferred embodiment, the mastoid simulation element 24 weighs 3.5 kg.

Those skilled in the art should understand that when simulating the force-impedance characteristic at the mastoid process of the skull, the characteristic only depends on the material of the contact surface and the counterweight, and has nothing to do with the material and shape of the counterweight.

Preferably, the coupler body 21 is substantially cylindrical and is made of sound insulating material to avoid possible interference of the force sensor 25 by external sound fields, and to ensure the accuracy of the test results to the greatest extent. Preferably, the coupling cavity body is made of aluminum alloy or stainless steel.

Those skilled in the art should understand that the material of the coupling cavity body can be freely selected according to different test conditions without departing from the purpose of the invention, and details are not described herein again.

In a preferred embodiment, in order to prevent external vibration from interfering with the test, at least four shock absorbing elements are provided at the bottom of the base 30 , and shock absorbing springs 31 may be selected for the shock absorbing elements.

In this embodiment, when testing the finished bone conduction hearing aid, the finished bone conduction earphone and the vibrator unit, the sample to be tested is placed on the skin simulation element 23 of the force coupler 20, and then a certain weight is placed on the pressing arm 12 At the same time, adjust the height of the lifting bracket 11 so that the buffer element 14 of the pressing arm 12 can press the sample to be tested.

Alternatively, during the test, the length of the tension spring 40 is adjusted to change the vertical downward static pressure of the pressing arm 12, and the height of the lifting bracket 11 is adjusted at the same time, so that the buffer element 14 of the pressing arm 12 can press the sample to be tested.

During the test, a certain sound is played to make the bone conduction unit of the sample to be tested vibrate, and the force sensor 25 is transmitted to the force sensor 25 through the skin simulation element 23 and the tungsten steel force transmission head. The interface 22 is transmitted into the next analysis instrument, and due to the presence of the mastoid simulation element 24, the force sensor 25 can simulate the force impedance characteristic of the mastoid process of the human skull when it vibrates.

Example 2

This embodiment provides a system for bone vibration testing, in which the features already included in Embodiment 1 are naturally inherited in this embodiment.

In this system, in addition to the narrow-band communication simulated mastoid for bone vibration test described in Embodiment 1, an adapter and an analyzer are also provided.

In a preferred embodiment, the adapter is signal-connected to the SMA interface 22 of the force coupler 20 for signal conditioning the output signal; The signal undergoes signal conditioning operations such as amplification, isolation, and filtering, and is finally sent to the analyzer.

Preferably, the analyzer includes relevant test analysis software stored in the host, and the specific analysis software is the software corresponding to the related test in the prior art, which is not the invention of this embodiment, and will not be repeated here.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the spirit of the present invention and the scope protected by the claims, many forms can be made, which all belong to the protection of the present invention.

Claims (10)

1. a narrow-band communication simulation mastoid for bone vibration test, is characterized in that, comprises force applying module, base and force coupler; The force applying module includes a lifting bracket and a pressing arm; the pressing arm is arranged horizontally and is used for installing weights and providing pressure in the vertical direction; the pressing arm includes a first end and a second end, the first The end is fixedly connected with the lifting bracket, and the second end is used to fix the sample to be tested; The force coupler includes a coupler body and a skin simulation element, a mastoid simulation element and a force sensor arranged in the coupler body; the skin simulation element is arranged on the top of the coupler body, and is connected to the pressing arm. The second end of the device is jointly fixing the sample to be tested; the force sensor and the mastoid simulation element are sequentially arranged below the skin simulation element, and the quality of the mastoid simulation element is consistent with the quality of the human skull; The base is fixed to the force coupler and the bottom of the lifting bracket. 2 . The narrow-band communication simulated mastoid for bone vibration test according to claim 1 , wherein the second end of the pressing arm comprises a pair of vertical and parallel downwardly arranged support arms, 2 . A buffer element is provided under the two support arms, and the buffer element is used to fix the sample to be tested. 3 . The narrow-band communication simulated papilla for bone vibration test according to claim 2 , wherein the buffer element comprises shock absorbing rubber. 4 . 4. The narrow-band communication simulated mastoid for bone vibration test according to claim 1, wherein a weight fixing member is provided between the first end and the second end of the pressing arm, The weight fixing member is arranged vertically downward. 5 . The narrow-band communication simulated mastoid for bone vibration test according to claim 1 , wherein the coupler body comprises a sound insulation material. 6 . 6 . The narrow-band communication simulated mastoid for bone vibration test according to claim 1 , wherein the coupler body comprises an SMA interface, and the SMA interface is connected with the force sensor. 7 . 7. The narrow-band communication simulation mastoid for bone vibration testing according to claim 2, wherein the skin simulation element comprises a vibration-transmitting rubber pad, and the vibration-transmitting rubber pad is used to generate the The amount of vibration is transmitted to the force sensor; the vibration-transmitting rubber pad corresponds to the position of the buffer element. 8 . The narrow-band communication simulation mastoid for bone vibration test according to claim 1 , wherein the mastoid simulation element comprises a counterweight with a mass of 3.5kg. 9 . 9 . The narrow-band communication simulated mastoid for bone vibration test according to claim 1 , wherein the lifting bracket and the coupler body are both vertically arranged on the base. 10 . 10 . The narrow-band communication simulated mastoid for bone vibration test according to claim 1 , wherein the bottom of the base is provided with at least four shock absorbing elements. 11 .

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