TWI811664B - Vibration collection device - Google Patents

Abstract

The present invention provides a vibration collection device, comprising: a housing for contacting a vibration source and having a supporting part inside; a vibration sensing unit provided on the supporting part for sensing a vibration generated from the vibration source and transmitted through the supporting part to generate a vibration signal; and a mass provided between the housing and the vibration sensing unit, wherein the mass has a convex part to control the quality of the vibration signal.

Description

Vibration collection device

The present invention relates to a vibration collection device, and in particular, to a vibration collection device that can simultaneously reduce noise and improve signal receiving sensitivity.

In existing piezoelectric vibration sensors, piezoelectric signals must be obtained through a seismic mass installed inside the sensor. For example, if a sensor is placed on the object to be measured, the vibration of the object to be measured can be transmitted to the mass block inside the sensor, so that the mechanical energy generated by the vibration of the mass block can be converted into electrical energy through the piezoelectric effect, and from there Obtain piezoelectric signals. In order to reduce the amount of noise in the piezoelectric signal, the mass block is usually completely attached to the piezoelectric sheet. This makes the piezoelectric sheet unable to detect subtle vibrations due to the mass block being too heavy, and thus the existing piezoelectric sheet cannot be used. Vibration sensors can be used in other fields.

Therefore, it is necessary to provide a new vibration collecting device to solve one of the above problems.

The main purpose of the present invention is to provide a vibration collecting device, which includes: a housing used to contact the vibration source and having a support part inside; a vibration sensing unit located on the support part for sensing Measure the vibration generated by the vibration source and transmitted through the support part to generate a vibration signal; and a mass block is provided between the housing and the vibration sensing unit and has a convex portion to control the quality of the vibration signal .

In the aforementioned vibration collecting device, the mass block partially contacts the vibration sensing unit through the convex portion.

In the aforementioned vibration collecting device, the convex portion is in contact with the edge of the vibration sensing unit.

In the aforementioned vibration collecting device, the position of the supporting part is corresponding to the convex part, so that the central part of the vibration sensing unit is not in contact with the convex part and the supporting part and is in a free state.

In the aforementioned vibration collecting device, the mass block does not contact the vibration sensing unit.

In the aforementioned vibration collecting device, the convex portion is annular.

In the aforementioned vibration collection device, the vibration sensing unit is a circular structure or a polygonal structure (such as a triangular structure, a rectangular structure).

In the aforementioned vibration collecting device, the vibration sensing unit is a sensor made of piezoelectric material.

In the aforementioned vibration collecting device, the vibration is mechanical motion vibration or sound vibration.

The aforementioned vibration acquisition device further includes a control component that is passed through the housing and connected to the mass block for moving the mass block to control whether the mass block contacts the vibration sensing unit and whether the mass block contacts the vibration sensor. Measure the pressure of the unit.

1: Vibration collection device

10: Shell

101:Support part

11:Vibration sensing unit

111:Central part

12: Mass block

121:convex part

13:Control parts

2: Vibration source

Figure 1 is a schematic cross-sectional view of an embodiment of the vibration collecting device of the present invention.

Figure 2 is a schematic cross-sectional view of another embodiment of the vibration collecting device of the present invention.

Figure 3 is a three-dimensional exploded view of the vibration sensing unit and the mass block in the vibration collection device of the present invention.

The following describes the implementation of the present invention through specific embodiments, and those familiar with the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification, and can also use other different specific embodiments. carry out or apply.

Please refer to FIG. 1 , which is a schematic cross-sectional view of an embodiment of the vibration collecting device of the present invention. The vibration collecting device 1 of the present invention includes a housing 10, a vibration sensing unit 11 and a mass block 12. The housing 10 is used to contact the vibration source 2, and the housing 10 is specifically hollow, and can have a support portion 101 inside. For example, the housing 10 can have a support portion 101 on the opposite inner surface of one surface that contacts the vibration source 2. .

The vibration sensing unit 11 can be disposed on the support part 101 to sense the vibration generated by the vibration source 2 and transmitted through the support part 101 , and the mass block 12 can be disposed between the housing 10 and the vibration sensing unit 11 . Specifically, in the embodiment of FIG. 1 , the mass block 12 may have a convex portion 121 , and partially contacts the vibration sensing unit 11 through the convex portion 121 . For example, as shown in FIG. 3 , the mass block 12 may be circular. shape, and the convex portion 121 is annular, and the vibration sensing unit 11 has a circular structure that can correspond to the annular shape, so that the convex portion 121 can partially contact the edge of the vibration sensing unit 11 . In addition, the position of the supporting part 101 may also correspond to the convex part 121. For example, the supporting part 101 may also be annular, so that the central part 111 of the vibration sensing unit 11 is not contacted by the convex part 121 and the supporting part 101 and is in a free state. In this way, when the housing 10 contacts the vibration source 2, the vibration generated by the vibration source 2 is transmitted to the vibration sensing unit 11 and the mass 12 through the support part 101, so that the mechanical energy generated by the vibration of the mass 12 can be transmitted through The contacted part of the vibration sensing unit 11 is converted into electrical energy, thereby generating a first signal. In addition, the central part 111 of the vibration sensing unit is not supported by the convex part 121 and The central part 111 is in contact with the part 101, so when the vibration generated by the vibration source 2 is transmitted to the vibration sensing unit 11, the central part 111 will move up and down due to the vibration, thereby generating a second signal. At this time, the first signal and the second signal can be outputted as different vibration signals respectively, or combined into a single vibration signal for output.

In one embodiment, the mass block 12 can be in a shape other than a circle, such as a triangle, a square or a polygon, and the convex portion 121 can be a corresponding triangular ring, square ring or polygonal ring structure, and the vibration sensing unit 11 and the supporting portion 101 can also be corresponding structures (for example, polygonal structures such as triangular structures, rectangular structures, etc.) to connect with the protruding portions 121, but the invention is not limited thereto.

Please refer to FIG. 2 , which is a schematic cross-sectional view of another embodiment of the vibration collecting device of the present invention. Compared with the previous embodiment, the difference of this embodiment is that the mass block 12 does not contact the vibration sensing unit 11 . Although the mass 12 does not contact the vibration sensing unit 11, the vibration generated by the vibration source 2 can still be transmitted to the vibration sensing unit 11 through the support part 101, so that the central part 111 of the vibration sensing unit 11 will move up and down due to the vibration. Movement, thereby generating vibration signals.

Both the embodiment of FIG. 2 and the embodiment of FIG. 1 can have a more sensitive sensing capability because the central part 111 of the vibration sensing unit 11 is in a free state. The embodiment of FIG. 1 can partially contact the mass block 12 The vibration sensing unit 11 can also have the effect of reducing received noise.

Please refer to Figure 1 and Figure 2 at the same time. The vibration collecting device 1 of the present invention further includes a control member 13. The control member 13 passes through the housing 10 and is connected to the mass block 12, and can be used to move the mass block 12. For example, the control member 13 can The mass block 12 can be controlled to contact the vibration sensing unit 11 (as shown in Figure 1), or the mass block 12 can be controlled not to contact the vibration sensing unit 11 (as shown in Figure 2), or even the mass block 12 can contact the vibration sensing unit. At 11 o'clock, the pressure of the mass block 12 contacting the vibration sensing unit 11 is controlled to control the reduction of noise and the The quality of the vibration signal generated. In one embodiment, the user can operate the control member 13 according to needs to obtain vibration signals of different qualities.

In one embodiment, the vibration sensing unit 11 may be a sensor made of piezoelectric material (crystal or ceramic), but the invention is not limited thereto.

In one embodiment, the vibration generated by the vibration source 2 can be mechanical motion vibration or sound vibration. The user can directly attach the vibration collection device 1 of the present invention to the desired detection location, such as an object, or The sound source of speakers and speakers, etc., can convert the vibration signal output by the vibration collecting device 1 of the present invention into a display mode that is easy for the user to interpret, such as the vibration frequency of an object or the vibration frequency of sound.

To sum up, through the structural design between the vibration sensing unit and the mass block in the vibration collection device of the present invention, the central part of the vibration sensing unit can be presented in a free state and have a more sensitive sensing capability, and can By partially contacting the vibration sensing unit with the mass block, the effect of receiving noise can be reduced. Therefore, the vibration collecting device of the present invention can not only detect general mechanical vibrations, but also detect subtle vibrations such as sound, pulse, heart rate, etc., thereby expanding the application field.

The above embodiments are only for illustrating the technical principles, characteristics and effects of the present invention, and are not intended to limit the scope of the present invention. Anyone familiar with this technology can implement the present invention without violating the spirit and scope of the present invention. Modifications and changes are made to the above embodiments. However, any equivalent modifications and changes accomplished by applying the teachings of the present invention should still be covered by the following patent application scope. The scope of protection of the rights of the present invention shall be as listed in the following patent application scope.

1: Vibration collection device

10: Shell

101:Support part

11:Vibration sensing unit

111:Central part

12: Mass block

121:convex part

13:Control parts

2: Vibration source

Claims (9)

A vibration collection device includes: a shell used to contact a vibration source and a support part inside; a vibration sensing unit provided on the support part to sense the vibration generated by the vibration source and transmitted through the support part The vibration is to generate a vibration signal, wherein the vibration is a mechanical motion vibration or a sound vibration; and a mass block is provided between the housing and the vibration sensing unit and has a convex portion to control the quality of the vibration signal. The vibration collecting device according to claim 1, wherein the mass block partially contacts the vibration sensing unit through the convex portion. The vibration collecting device according to claim 2, wherein the convex portion is in contact with an edge of the vibration sensing unit. The vibration collecting device according to claim 3, wherein the position of the supporting part corresponds to the convex part, so that the central part of the vibration sensing unit is not in contact with the convex part and the supporting part and is in a free state. . The vibration collecting device according to claim 1, wherein the mass block does not contact the vibration sensing unit. The vibration collecting device according to claim 1, wherein the convex portion is annular. The vibration collecting device according to claim 1, wherein the vibration sensing unit is a circular structure or a polygonal structure. The vibration collecting device according to claim 1, wherein the vibration sensing unit is a sensor made of piezoelectric material. The vibration collecting device as described in claim 1, further comprising a control component that is inserted through the housing and connected to the mass block for moving the mass block to control whether the mass block contacts the vibration sensing unit and the mass block. The amount of pressure touching the vibration sensing unit.

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