Vibration meter

Abstract

To provide a vibration meter with improved user convenience. [Solution] The vibrometer has an analog detection unit having a first housing and a first membrane, and a digital detection unit having a second housing, a second membrane, and a sensor. The first housing has a partial opening and is hollow from the opening to the inside. The first membrane covers the opening of the first housing. The second housing is located on the first housing and has a recess. The second membrane covers the opening on the recess side of the second housing. The sensor is located on the second membrane.

Description

[Technical Field]

[0001] The present invention relates to a vibrometer. [Background technology]

[0002] Vibrometers that detect vibration as a physical quantity are known. For example, there is a vibrometer that uses a film-like piezoelectric element to convert vibration into a voltage, which is then converted into an acoustic signal. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-179177 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional vibration meters have room for improvement in terms of user convenience. [Means for solving the problem]

[0005] A vibrometer according to one embodiment of the present disclosure includes an analog detection unit having a first housing with a partial opening and a hollow interior from the opening portion, and a first membrane located in the first housing and covering the opening, and a digital detection unit having a second housing with a recess located in the first housing, a second membrane covering the opening on the recess side, and a sensor located on the second membrane. [Effects of the Invention]

[0006] According to the vibrometer according to an embodiment of the present disclosure, it is possible to improve convenience for the user. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is an overall view of a vibrometer according to a first embodiment. [Figure 2] FIG. 2 is a diagram showing a part of the vibrometer according to the first embodiment. [Figure 3] 3 is a cross-sectional view of the vibrometer according to the first embodiment taken along line AA in FIG. 2. FIG. [Figure 4] FIG. 10 is a diagram showing a part of a vibrometer according to a second embodiment. [Figure 5] FIG. 5 is a cross-sectional view of the vibrometer according to the second embodiment taken along line AA in FIG. 4. [Figure 6] 5 is a cross-sectional view of a vibrometer according to a modified example of the second embodiment, taken along a line corresponding to the line AA shown in FIG. 4. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings.

[0009] First Embodiment A vibrometer 1 according to a first embodiment will be described below with reference to the drawings as appropriate. The vibrometer 1 is a vibrometer that can detect vibrations of an object by being brought into contact with the object. For example, if the object is a living organism, the vibrometer 1 can be brought into contact with a predetermined part of the living organism. For example, if the object is a human body, the vibrometer 1 can be brought into contact with the chest, back, wrist, neck, abdomen, or the like of the human body. For example, if the object is a machine that constitutes a manufacturing facility or the like, the vibrometer 1 can be brought into contact with a predetermined part of the machine that is the object. The vibrometer 1 can directly transmit the detected vibrations to a user, or can generate a detection signal corresponding to the detected vibrations.

[0010] The configuration of the vibration meter 1 will be described with reference to FIGS. 1, 2, and 3. As shown in FIG. 1, the vibration meter 1 has an analog detection unit 11, a digital detection unit 12, a cylindrical member 13, and an earpiece 14. The analog detection unit 11 can detect vibrations of an object. The vibration meter 1 can transmit the vibrations detected by the analog detection unit 11 directly to the user via the cylindrical member 13 and the earpiece 14. The digital detection unit 12 can detect vibrations of the object. The digital detection unit 12 can generate a detection signal corresponding to the detected vibrations. The digital detection unit 12 can transmit the vibrations of the object via the detection signal.

[0011] The analog detection unit 11 and the digital detection unit 12 can be used selectively depending on the type of object or the situation of use. The analog detection unit 11 and the digital detection unit 12 may be capable of detecting vibrations in the same frequency band. The analog detection unit 11 and the digital detection unit 12 may be capable of detecting different frequency bands. For example, the analog detection unit 11 may be capable of detecting frequency bands above 20 Hz and below 20,000 Hz, which are the approximate range of human hearing, and the digital detection unit 12 may be capable of detecting higher or lower frequency bands than the analog detection unit 11. The digital detection unit 12 may be capable of detecting a wider frequency band than the analog detection unit 11. The digital detection unit 12 may be capable of detecting a frequency band that overlaps with the frequency band that the analog detection unit 11 can detect.

[0012] The center frequency of vibrations detectable by the analog detection unit 11 and the center frequency of vibrations detectable by the digital detection unit 12 may be the same frequency. The center frequency of vibrations detectable by the analog detection unit 11 and the center frequency of vibrations detectable by the digital detection unit 12 may be different frequencies. The center frequency of vibrations detectable by the digital detection unit 12 may be higher than the center frequency of vibrations detectable by the analog detection unit 11. For example, the center frequency of vibrations detectable by the analog detection unit 11 is 20 Hz or higher and 20,000 Hz or lower, which are within the human audible range, and the center frequency of vibrations detectable by the digital detection unit 12 may be higher or lower than the center frequency of vibrations detectable by the analog detection unit 11. For example, the center frequency of vibrations detectable by the digital detection unit 12 may be 20 Hz or lower or 20,000 Hz or higher. For example, the center frequency of vibrations detectable by the digital detection unit 12 may be a frequency band of around 20 Hz or around 20,000 Hz.

[0013] The cylindrical member 13 transmits the vibrations detected by the analog detection unit 11 to the earpiece 14. The cylindrical member 13 connects the analog detection unit 11 and the earpiece 14. For example, the cylindrical member 13 may be made of a material such as polyvinyl chloride or silicone rubber. The earpiece 14 transmits the vibrations transmitted from the cylindrical member 13 to a user or the like. The earpiece 14 is worn in the ear of a user or the like. For example, the earpiece 14 may be made of a material such as polyurethane or silicone rubber.

[0014] (Analog detection section) 3, the analog detection unit 11 has a first housing 111 and a first membrane 112. In the analog detection unit 11, the first housing 111 and the first membrane 112 form a first internal space S1. The analog detection unit 11 detects vibrations occurring in the first membrane 112 by transmitting the vibrations of an object to the first membrane 112. For example, the vibrations occurring in the first membrane 112 are transmitted to the cylindrical member 13 via the air in the first internal space S1 of the analog detection unit 11.

[0015] The first housing 111 is the exterior of the analog detection unit 11. The first housing 111 can function as a part that is held in the hand when the user uses the vibrometer 1. A first membrane 112 is disposed on the first housing 111. As shown in FIG. 3, the first housing 111 has an opening at one end, and the inside from the opening is hollow. The first housing 111 opens in the negative direction of the Z axis. For example, the shape of the opening of the first housing 111 is circular. The shape of the opening of the first housing 111 is not limited to circular, and any shape can be selected, such as an ellipse, a square, a rectangle, or a hexagon. As shown in FIG. 3 , the first housing 111 has a concave structure and includes a first recess 1111 in which the first film 112 is disposed, a connection part 1112 that is connected to the first recess 1111 and is connected to the cylindrical member 13, and a hole 1113 that connects the inner surface of the first recess 1111 and the inner surface of the connection part 1112.

[0016] As shown in FIG. 3, the first recess 1111 opens in the negative direction of the Z axis. The sidewall of the first recess 1111 has a shape that gradually becomes thicker toward the positive direction of the Z axis. A portion of the outer surface of the first recess 1111 has a cylindrical shape. The outer surface of the first recess 1111 has a truncated cone shape. The inner surface of the first recess 1111 has a truncated cone shape. The first recess 1111 defines a first recess space S2 therein. The first recess space S2 is a part of the first internal space S1. The first recess space S2 has a truncated cone shape. The first recess space S2 is configured so that the cross-sectional area in a cross section parallel to the XY plane decreases toward the connecting portion 1112. The cross-sectional area of ​​the first recess space S2 in a cross section parallel to the XY plane gradually decreases toward the positive direction of the Z axis.

[0017] As shown in FIG. 3, the connection portion 1112 opens in the positive direction of the Y axis. The open portion of the connection portion 1112 is connected to the cylindrical member 13. The connection portion 1112 is hollow inside. The connection portion 1112 defines a connection portion space S3 therein. The connection portion space S3 is part of the first internal space S1. The connection portion space S3 is connected to the first recess space S2 via a hole 1113. The connection portion space S3 has a cylindrical shape with the Y axis direction as its longitudinal direction.

[0018] As shown in FIG. 3, the hole 1113 extends from the inner surface of the concave structure of the first recess 1111. The hole 1113 extends from the inner surface of the connection portion 1112. The hole 1113 connects the first recess space S2 and the connection portion space S3. The shape of the hole 1113 is cylindrical with the Z axis as the longitudinal direction. The shape of the hole 1113 is not limited to a cylindrical shape, and any shape can be selected, such as a truncated cone, a square prism, or a hexagonal prism. The hole 1113 has a shape that has a thickness in the Z axis direction.

[0019] The outer shape of first housing 111 when viewed from above in the Z-axis direction is circular. The outer shape of first housing 111 when viewed from above in the Z-axis direction is not limited to circular, and any shape can be selected, such as square, rectangle, or ellipse. Furthermore, the outer shape of first housing 111 when viewed from above in the Z-axis direction may be the same as the outer shape of first film 112 or second housing 121 when viewed from above in the Z-axis direction. For example, the material of first housing 111 can be resin, metal, ceramic, or the like.

[0020] In the first housing 111, the first recess 1111 and the connecting portion 1112 are integral. Here, "integral" means that the first housing 111 is formed from a single member, not from a plurality of members joined together. The first housing 111 may be formed from two or more members joined together. For example, the first housing 111 may be formed by joining the first recess 1111 and the connecting portion 1112 together. In this case, in the vibrometer 1, the connecting portion 1112 is disposed between the first recess 1111 and the second housing 121 (described later). The first recess 1111 and the connecting portion 1112 may be formed from different materials. Furthermore, the first recess 1111 may be formed by joining a cylindrical portion and a truncated cone portion located on the first membrane 112 side together.

[0021] The first film 112 receives vibrations from the object and moves mainly in the vertical direction (in this embodiment, the Z axis direction). The first film 112 can deform in response to the transmitted vibration so as to be displaced in the direction (the direction of the vibration). The first film 112 can transmit the vibration from the object to the air in the first internal space S1 of the analog detection unit 11, etc.

[0022] 3, the first membrane 112 covers the opening of the first housing 111. The first membrane 112 is located on the first recess 1111 of the first housing 111. The first membrane 112 may be located inside the first recess 1111. For example, the first membrane 112 is located inside the first recess 1111 of the first housing 111. When the first membrane 112 is located inside the first recess 1111, the first membrane 112 does not come into contact with the object, and vibrations from the object are transmitted to the first membrane 112 via air or the like located between the first membrane 112 and the object.

[0023] The outer shape of the first film 112 when viewed from above in the Z-axis direction is circular. The outer shape of the first film 112 when viewed from above in the Z-axis direction is not limited to circular, and any shape can be selected, such as square, rectangle, or ellipse. The outer shape of the first film 112 when viewed from above in the Z-axis direction may be the same as the outer shape of the first housing 111 when viewed from above in the Z-axis direction.

[0024] For example, the thickness of the first film 112 may be 10 μm or more and 5000 μm or less. For example, the Young's modulus of the first film 112 may be 1.0×10 5 Pa or more and 1.0 x 10 12 For example, the density of the first film 112 may be 100 kg / m 3 and above 5000kg / m 3 For example, the sound speed of vibrations that can be detected by the first membrane 112 may be 10 m / s or more and 20,000 m / s or less.

[0025] For example, the material of first film 112 can be silicone, glass epoxy, acrylonitrile butadiene styrene, carbon fiber reinforced plastic, urethane, or epoxy. First film 112 may be fixed to first housing 111 with an adhesive or the like. For example, the adhesive can be made of a resin material such as epoxy resin, or a metal material such as solder.

[0026] (Digital detection unit) 3, the digital detection unit 12 has a second housing 121, a second membrane 122, a sensor 123, and a control unit 124. In the digital detection unit 12, the second housing 121 and the second membrane 122 form a second internal space S4. The digital detection unit 12 transmits vibrations of the object to the second membrane 122, and the sensor 123 detects the vibrations generated in the second membrane 122.

[0027] The second housing 121 is an exterior of the digital detection unit 12. The second housing 121 can function as a part that is held in the user's hand when using the vibrometer 1. A second membrane 122 is disposed in the second housing 121.

[0028] 3, second housing 121 is located in first housing 111 and has second recess 1211. Second housing 121 is located on first housing 111. A part of second housing 121 may be located inside first housing 111. Second housing 121 is open on the second recess 1211 side, and the inside from the opening is hollow. Second housing 121 is open in the positive direction of the Z axis.

[0029] As shown in FIG. 3, the second recess 1211 opens in the positive direction of the Z axis. A control unit 124, which will be described later, is located on the bottom surface of the second recess 1211. The control unit 124 may be located on the side surface of the second recess 1211. For example, the thickness of the side wall of the second recess 1211 is set to be constant in the Z axis direction. The thickness of the side wall of the second recess 1211 may have a shape that varies in the Z axis direction. The bottom surface of the second recess 1211 is located on the connecting portion 1112. The second recess 1211 does not have a bottom surface, and only the side wall of the second recess 1211 is located on the connecting portion 1112. 1112.

[0030] The thickness of second housing 121 in the Z axis direction is different from the thickness of first housing 111 in the Z axis direction. The thickness of second housing 121 in the Z axis direction may be smaller than the thickness of first housing 111 in the Z axis direction. The thickness of second housing 121 in the Z axis direction may be the same as the thickness of first housing 111 in the Z axis direction.

[0031] The shape of the opening of second housing 121 is circular. The shape of the opening of second housing 121 is not limited to circular, and any shape may be selected, such as elliptical, square, rectangular, or hexagonal. The shape of the opening of second housing 121 is the same as the shape of the opening of first housing 111. The shape of the opening of second housing 121 may be different from the shape of the opening of first housing 111. For example, the shape of the opening of first housing 111 may be circular, and the shape of the opening of second housing 121 may be square. With the above configuration, vibrometer 1 can selectively use analog detection unit 11 and digital detection unit 12 depending on the shape of the target object.

[0032] The area of ​​the opening portion of second housing 121 is different from the area of ​​the opening portion of first housing 111. For example, the area of ​​the opening portion of second housing 121 is smaller than the area of ​​the opening portion of first housing 111. Here, the "area of ​​the opening portion" refers to the area of ​​the hollow region surrounded by the opening portion. The area of ​​the opening portion of second housing 121 may be larger than the area of ​​the opening portion of first housing 111. The area of ​​the opening portion of second housing 121 may be the same as the area of ​​the opening portion of first housing 111.

[0033] The outer shape of second housing 121 when viewed from above in the Z-axis direction is circular. The outer shape of second housing 121 when viewed from above in the Z-axis direction is not limited to circular, and any shape can be selected, such as square, rectangle, or ellipse. The outer shape of second housing 121 when viewed from above in the Z-axis direction may be the same as the outer shape of second film 122 or first housing 111 when viewed from above in the Z-axis direction. The outer shape of second housing 121 when viewed from above in the Z-axis direction may be different from the outer shape of second film 122 or first housing 111 when viewed from above in the Z-axis direction. The material of second housing 121 can be resin, metal, ceramics, or the like.

[0034] The outer surface of second housing 121 may have a region with an uneven shape. For example, a cross section of the outer surface of second housing 121 in the YZ plane may have a region with an uneven shape. For example, a cross section of the outer surface of second housing 121 in the XY plane may have a region with an uneven shape. For example, the outer surface of second housing 121 may have a region with an uneven shape, and the outer surface of first housing 111 may not have a region with an uneven shape. For example, the outer surface of second housing 121 may not have a region with an uneven shape, and the outer surface of first housing 111 may have a region with an uneven shape.

[0035] The inner and outer surfaces of the second recess 1211 are cylindrical. The inner and outer surfaces of the second recess 1211 are not limited to a cylindrical shape, and any shape may be selected, such as a truncated cone, a square prism, or a hexagonal prism. The bottom surface of the second recess 1211 is circular. The bottom surface of the second recess 1211 is not limited to a circular shape, and any shape may be selected, such as an elliptical or square shape.

[0036] The second film 122 is capable of deforming in response to vibration transmitted from the object so as to be displaced mainly in the vertical direction (in this embodiment, this refers to the Z-axis direction) in response to the transmitted vibration. The second film 122 is capable of transmitting the vibration from the object to the sensor 123.

[0037] As shown in FIG. 3, the second film 122 covers the opening of the second housing 121 on the side of the second recess 1211. The second film 122 is located on the second recess 1211 of the second housing 121. The second film 122 may be located inside the second recess 1211. The second film 122, together with the second recess 1211, constitutes a second internal space S4.

[0038] The second membrane 122 is located on the opposite side of the first membrane 112 with respect to the first internal space S1. By having this configuration, the vibrometer 1 can reduce the risk of the analog detection unit 11 or the digital detection unit 12 coming into contact with the object when the other is brought into contact with the object.

[0039] The film thickness, Young's modulus, or sound velocity of detectable vibration of the second film 122 may be the same as or different from those of the first film 112. The material of the second film 122 may be the same as or different from that of the first film 112. The second film 122 may be fixed to the second housing 121 with an adhesive or the like. For example, the adhesive may be made of a resin material such as epoxy resin, or a metal material such as solder.

[0040] The sensor 123 can detect vibrations emitted by the object as a physical quantity. The sensor 123 detects vibrations of the second film 122 that accompany the vibrations emitted by the object. The sensor 123 can output the detected vibrations to the control unit 124 as a detection signal.

[0041] 3, the sensor 123 is located on the second film 122. The sensor 123 is located on the surface of the second film 122 that faces the second housing 121. The sensor 123 is located on the surface of the second film 122 that faces the second recess 1211 of the second housing 121. The sensor 123 is located within the second internal space S4.

[0042] For example, the sensor 123 may be a gyro sensor that can detect vibrations generated by an object as angular velocity. For example, the sensor 123 may be an acceleration sensor that can detect vibrations generated by an object as acceleration. The position of the sensor 123 relative to the second film 122 can be set appropriately depending on the type of sensor used. For example, when an acceleration sensor is used as the sensor 123, the position of the sensor 123 can be set at a position on the second film 122 where the displacement is greatest.

[0043] The control unit 124 can acquire a detection signal from the sensor 123. The control unit 124 can convert the detection signal into an electrical signal such as a vibration or sound. For example, the control unit 124 may have a sound output unit that creates sound data based on the detection signal from the sensor 123. For example, the control unit 124 may have a waveform output unit that creates waveform data of the vibration of the second membrane 122 based on the detection signal from the sensor 123.

[0044] The control unit 124 is electrically connected to the sensor 123. For example, the control unit 124 includes a board having an electronic circuit, such as a printed circuit board. The control unit 124 is located on the second housing 121. The control unit 124 may be located inside the second housing 121. The control unit 124 is located in the second internal space S4. The control unit 124 may be located on the outer surface of the second housing 121.

[0045] 3, the digital detection unit 12 has a conductor 125 that connects the sensor 123 and the control unit 124. The conductor 125 electrically connects the sensor 123 and the control unit 124. The conductor 125 is made of a conductive material such as copper, silver, or gold. The conductor 125 may be coated with rubber, carbon fiber reinforced plastic, glass fiber reinforced plastic, or the like to protect the conductive portion.

[0046] The digital detector 12 may include a battery to power the sensor 123. The battery may be located on the second housing 121. The battery may be located inside the second housing 121. The battery and the sensor 123 may be connected by a conductor 125. The battery and the control unit 124 may be connected by a conductor 125.

[0047] The vibration meter 1 has an analog detection unit 11 and a digital detection unit 12. Therefore, by using the vibration meter 1, it is not necessary to prepare multiple vibration meters according to the vibration detection means. Furthermore, as shown in FIG. 3 , in the vibration meter 1, the second housing 121 of the digital detection unit 12 is located in the first housing 111 of the analog detection unit 11. Therefore, by using the vibration meter 1, it is possible to easily switch between vibration detection using the analog detection unit 11 and vibration detection using the digital detection unit 12.

[0048] The following describes a case where the vibration meter 1 is used as a stethoscope for a doctor to listen to sounds emanating from inside a patient's body. In auscultation using the analog detection unit 11, the doctor can listen to sounds directly with his or her own ears. In auscultation using the digital detection unit 12, the detected sounds can be recorded as data and shared with a remote location. By using the vibration meter 1, after auscultation using the analog detection unit 11, it is easy to switch to the digital detection unit 12, record the sound data, and share the sound data with a remote location. In particular, in emergency medical care settings, it is important to be able to smoothly switch between auscultation using the analog detection unit 11 and sound detection using the digital detection unit 12.

[0049] Furthermore, even when the vibration meter 1 detects vibrations of the same object, the sound heard directly by one's ear using the analog detection unit 11 may differ from the sound electronically recorded by the digital detection unit 12. In particular, the sound electronically recorded by the digital detection unit 12 may sound different depending on the means of playback. When the vibration meter 1 is used as a stethoscope, a doctor does not need to carry multiple vibrometers when comparing the sound transmitted by the analog detection unit 11 with the sound recorded by the digital detection unit 12. Therefore, the vibration meter 1 can easily compare the sound transmitted by the analog detection unit 11 with the sound recorded by the digital detection unit 12.

[0050] 3, in the vibrometer 1, the first internal space S1 and the second internal space S4 are separated by the bottom surface of the second recess 1211 and a part of the connecting portion 1112. The first internal space S1 and the second internal space S4 may be separated by only either the bottom surface of the second recess 1211 or a part of the connecting portion 1112. With the above configuration, the vibrometer 1 can reduce the risk that the vibrations of the first membrane 112 and the second membrane 122 will interfere with the vibrations of the other membrane through the first internal space S1 and the second internal space S4.

[0051] Second Embodiment Hereinafter, a vibrometer 2 according to the second embodiment will be described with reference to the drawings as appropriate. For ease of description, components having the same functions as those described in the above embodiments will be denoted by the same reference numerals, and their description will not be repeated. Even if components corresponding to (similar to) those in the previously described embodiments are denoted by reference numerals different from those in the previously described embodiments, they are the same as or similar to those in the previously described embodiments unless otherwise specified.

[0052] The configuration of the vibration meter 2 will be described with reference to Figures 4 and 5. The vibration meter 2 differs from the vibration meter 1 mainly in the structure of the digital detection unit 22.

[0053] As shown in FIG. 5, in the vibrometer 2, a part of the digital detection unit 22 is located inside the analog detection unit 21. The second membrane 222 faces the hollow part of the first housing 211. The second membrane 222 faces the first internal space S1 of the analog detection unit 21. The second membrane 222 faces the hollow part of the connection part 2112 of the first housing 211. In this specification, the term "facing" refers to a membrane that faces a hollow part of the first housing 211. " includes not only the case where the second film 222 is in direct contact with the hollow portion of the connecting portion 2112, but also the case where the second film 222 is positioned opposite the hollow portion of the connecting portion 2112 and is not in direct contact with it.

[0054] In the vibration meter 2, vibrations of the first membrane 212 are transmitted to the second membrane 222 via the first internal space S1. The vibrations transmitted to the second membrane 222 are detected by the sensor 223, and the sensor 223 transmits a detection signal corresponding to the detected vibrations to the control unit 224. With the above configuration, the vibration meter 2 can simultaneously detect the vibrations of the object by the analog detection unit 21 and the digital detection unit 22.

[0055] The second membrane 222 is located on the first housing 211. The second membrane 222 is located on the connection portion 2112 of the first housing 211. In the vibrometer 2, the second housing 221 may be located inside the first housing 211, and the second membrane 222 may be located on the second housing 221.

[0056] 5, the first housing 211 has two openings. The connection portion 2112 of the first housing 211 has an opening. In the first housing 211, the first film 212 is arranged above the opening portion of the first recess 2111, and the second film 222 is arranged above the opening portion of the connection portion 2112.

[0057] 5, the second housing 221 is open on the side facing the first housing 211. The second recess 2211 of the second housing 221 is arranged so that it has a bottom surface on the side opposite to the side where the first housing 211 is located. The opening portion of the second housing 221 is located on the first housing 211. The opening portion of the second housing 221 is connected to the opening portion of the connection portion 2112. For example, the opening portion of the second housing 221 has the same shape as the opening portion of the connection portion 2112. The opening portion of the second housing 221 may have a different shape from the opening portion of the connection portion 2112. The opening portion of the second housing 221 may be larger than the opening portion of the connection portion 2112.

[0058] 5, the sensor 223 is located on the surface of the second film 222 on the side of the second recess 2211 of the second housing 221. The sensor 223 may also be located on the surface of the second film 222 on the side of the connection portion 2112 of the first housing 211.

[0059] (Modification of the second embodiment) A vibration meter 3 according to a modification of the second embodiment will be described below.

[0060] The configuration of the vibration meter 3 will be described with reference to Fig. 6. The vibration meter 3 differs from the vibration meter 2 in the positions of the first membrane 312 and the second membrane 322, and the structure of the second housing 321.

[0061] In the vibrometer 3, the first membrane 312 is located inside the first recess 3111. The first membrane 312 is located at the end of the first recess 3111 on the negative side in terms of the Z axis. In the vibrometer 3, the second membrane 322 is located on the second housing 321. The second membrane 322 is located inside the second recess 3211. The second membrane 322 is located at the end of the second recess 3211 on the negative side in terms of the Z axis. The second membrane 322 is located at the end of the second recess 3211 on the connection portion 3112 side. In the vibrometer 3 as well, the second membrane 322 faces the first internal space S1.

[0062] In the vibrometer 3, the second housing 321 has a through-hole 3212 that connects the inner surface of the second recess 3211 to the outer surface of the second housing 321. The through-hole 3212 connects from the bottom surface of the second recess 3211 to the outer surface of the second housing 321. The through-hole 3212 may connect from the inner surface of the second recess 3211 to the outer surface of the second housing 321. The vibrometer 3 having the above configuration can reduce the effect of the air pressure in the second internal space S4 on the second membrane 322. can.

[0063] In the vibrometer 3, the second housing 321 has a through-hole 3212, and the sensor 323 is located on the surface of the second membrane 322 that faces the second recess 3221 of the second housing 321. By having the above-described configuration, the vibrometer 3 can reduce the effect of the air pressure in the second internal space S4 on the sensor 323.

[0064] The invention according to the present disclosure has been described above based on the drawings and examples. However, the invention according to the present disclosure is not limited to the above-described embodiments and modifications. In other words, the invention according to the present disclosure can be modified in various ways within the scope of the present disclosure, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the invention according to the present disclosure. In other words, it should be noted that a person skilled in the art could easily make various modifications or alterations based on the present disclosure. It should also be noted that these modifications or alterations are included in the scope of the present disclosure.

[0065] For example, the second housing 121 of the vibrometer 1 may have a through-hole that connects the inner surface of the second recess 1211 to the outer surface of the second housing 121. When the vibrometer 1 has the above configuration, similar to the vibrometer 3, the influence of the air pressure in the second internal space S4 on the second membrane 322 can be reduced.

[0066] For example, in the vibration meter 1, the control unit 124 has been described as converting the detection signal into an electrical signal such as vibration or sound, but the present invention is not limited to this. The control unit 124 of the vibration meter 1 may be configured as a system having a transmitter that transmits the detection signal of the sensor 123 to an externally installed server, and the server converts the detection signal into an electrical signal such as vibration or sound. In this case, the server may convert the detection signal into an electrical signal such as vibration or sound, and may also record the electrical signal.

[0067] For example, the analog detection unit 11 and the digital detection unit 12 of the vibration meter 1 may be detachable. For example, when the vibration meter 1 has the above configuration, the first housing 111 and the second housing 121 may be detachable using a magnet, Velcro (registered trademark), or the like. When the vibration meter 1 has the above configuration, it is possible to use the vibration meter 1 by replacing only a faulty component of the analog detection unit 11 or the digital detection unit 12 with a non-faulty component.

[0068] For example, the vibrometer 1 may have two or more analog detection units 11. The two or more analog detection units 11 may have different sizes of the first housings 111. The two or more analog detection units 11 may have different shapes of openings in the first housings 111. The two or more analog detection units 11 may have different areas of openings in the first housings 111. The two or more analog detection units 11 may have a structure that does not include the first film 112.

[0069] For example, the vibrometer 1 may have two or more digital detectors 12. The two or more digital detectors 12 may have different sizes of second housings 121. The two or more digital detectors 12 may have different shapes of openings in the second housings 121. The two or more digital detectors 12 may have different areas of openings in the second housings 121. The two or more digital detectors 12 may have different film thicknesses or materials of the second films 122.

[0070] For example, the analog detection unit 11 may not have the first film 112. In this case, the analog detection unit 11 may be configured to collect sound emitted from an object in the first recess 1111 of the first housing 111 and transmit the collected sound to the user.

[0071] For example, in the above description of the vibrometer 1, the sensor 123 and the control unit 124 are connected by the conductor 125, but the present invention is not limited to this. In the vibrometer 1, the sensor 123 and the control unit 124 may be housed in a single package, and the package may be located on the first membrane 112. In this case, the package and the battery may be connected by the conductor 125. [Explanation of symbols]

[0072] 1,2,3 Vibration meter 11, 21, 31 Analog detection unit 111,211,311 1st cabinet 1111,2111,3111 First recess 1112,2112,3112 connection parts 1113,2113,3113 hole 112,212,312 1st membrane 12, 22, 32 Digital detector 121,221,321 Second cabinet 1211,2211,3211 Second recess 3212 Through hole 122,222,322 Second membrane 123,223,323 sensors 124,224,324 Control unit 125,225,325 Conductor 13 Cylindrical member 14 earpieces S1 1st internal space S2 First recessed space S3 Connection space S4 2nd internal space

Claims

1. an analog detection unit including a first housing having a partial opening and a hollow interior from the opening portion, and a first film located on the first housing and covering the opening; a digital detection unit having a second housing located in the first housing and having a recess, a second membrane covering an opening on the recess side, and a sensor located on the second membrane.

2. The vibrometer of claim 1 , wherein the first membrane is located on an opposite side of the hollow portion of the first housing from the second membrane.

3. The vibrometer according to claim 1 , wherein a shape of the opening of the first housing is different from a shape of an opening of the second housing on the recess side.

4. The vibrometer according to claim 1 , wherein an area of ​​the opening of the first housing is different from an area of ​​the opening of the second housing on the recess side.

5. The vibrometer according to claim 4 , wherein an area of ​​the opening of the first housing is larger than an area of ​​the opening of the second housing on the recess side.

6. The vibrometer according to claim 1 , wherein a hollow portion of the first housing and a space defined by the recess of the second housing and the second membrane are separated by a part of the second housing.

7. The vibrometer of claim 1 , wherein the first membrane is located on the first housing and the second membrane is located on the second housing.

8. The vibrometer according to claim 1 , wherein the first housing has a first recess in which the first membrane is disposed, and a connection portion disposed between the first recess and the second housing.

9. The vibrometer according to claim 1 , wherein the second membrane faces the hollow portion of the first housing.

10. The vibrometer according to claim 1 , wherein the second housing has a through-hole that connects a bottom surface or a side surface of the recess to an outer surface of the second housing.

11. The vibrometer according to claim 9 , wherein the sensor is located on a surface of the second membrane that faces the recess of the second housing.

12. The vibrometer of claim 1 , wherein the second membrane is located on the first housing.

13. The vibrometer of claim 1 , wherein the second membrane is located within the recess.

14. The vibrometer according to claim 1 , further comprising: a cylindrical member connected to the first housing; and an earpiece located at an end of the cylindrical member.

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