KR101066824B1 - Apparatus for sensing vibration - Google Patents

Abstract

Vibration detecting apparatus according to the present invention, a hollow housing, a hollow moving guide inserted into the housing, a moving guide support member installed in the housing for supporting the moving guide, and in the housing An elastic member for applying an elastic force to the moving guide, a connector installed on one side of the moving guide, a vibration sensor for detecting vibration of a vibration detection object, a cable connected to the vibration sensor and the connector, and vibration And a probe contacting the detection object, a probe housing coupled to the moving guide to receive the probe, and a probe elastic member disposed between the probe and the probe housing.

According to the present invention, it is possible to reduce the friction between the inner surface of the housing and the moving guide, and to prevent the transmission of vibration from the probe to the housing, thereby reducing the measurement error.

In addition, by configuring the cable connected to the vibration sensor relative movement with the vibration sensor, it is possible to further increase the connection durability of the cable.

Vibration, detection, probe

Description

Vibration Detection Device {APPARATUS FOR SENSING VIBRATION}

The present invention relates to a vibration detection device for detecting vibration of a structure, and more particularly, to a vibration detection device that can increase the vibration detection reliability and increase the durability of the device.

In recent years, the importance of noise and vibration quality of various products including automobiles, home appliances, etc. has been highlighted, and the vibrations generated from components during the production process or maintenance of the above products are measured to check for abnormalities.

In particular, the measurement of the proximity sound for the vehicle component or the measurement of the vibration signal at the vibration site may provide a lot of clues in determining the abnormality of the component.

In order to improve the noise and vibration quality of production products or to determine whether there are any abnormalities, suppliers of industrial products are introducing a vibration quality inspection system to the mass production line of products.

The process of detecting vibration of various vibration structures including an engine is typically performed by attaching or contacting a vibration sensor using a piezoelectric element to the corresponding part to convert the vibration generated from the part into an electrical signal.

As a method of attaching the vibration sensor to the part, a method of applying an adhesive or adhesive wax between the bottom of the vibration sensor and the part is mainly used.

However, in the case of mass production lines, a rapid vibration measurement is required, and thus there is a problem in that the process yield is reduced due to the time required for applying and removing the adhesive.

Meanwhile, another method of attaching the vibration sensor to the part is a method of directly attaching the vibration sensor to the surface of the part using a magnet, but in this case, there is a limit that the part to be detected must be made of a metallic material having magnetic properties. .

As another method for solving these problems, as shown in FIG. 1, a pressing method using a spring has recently been used.

Briefly, when the probe 103 is pressed onto the surface of the vibration detection object while the housing 101 is gripped by an actuator, vibration generated from the object is connected to the probe 103. Vibration is detected at 105.

At this time, the moving guide 107 coupled with the probe 103 is moved horizontally in the housing 101, the coil spring 109 in the housing 101 to apply an elastic force to the horizontal movement. It is built.

By the way, in the conventional vibration detection device as described above, when the tip of the probe 103 and the surface of the detection target surface is not exactly vertically contacted, a bending force is generated in the probe 103.

Thus, due to friction of the surface of the moving guide 107 in direct contact with the inner surface of the housing 101, there was a problem that increases the measurement error in the vibration measurement of the vibration sensor 105 using a piezoelectric element.

In addition, the horizontal width of the moving guide 107 is relatively smaller than the housing 101, the contact pressure between the inner surface of the housing 101 and the moving guide 107 is increased, such as friction and As a result, there was a problem that the measurement error becomes larger.

In addition, the probe 103 and the moving guide 107 is directly coupled, the vibration transmitted through the probe 103 is transmitted to the housing 101 via the moving guide 107, thereby measuring vibration The whole device is vibrated.

This phenomenon is one factor of increasing the error of the measurement compared to the case where the vibration transmitted to the probe 103 is transmitted to the vibration sensor 105 without loss.

In addition, the cable 111 connected to the vibration sensor 105 is stopped, the vibration sensor 105 is displaced in the horizontal direction by the horizontal vibration transmitted to the probe 103, the cable 111 And the connection between the vibration sensor 105 has occurred.

The present invention has been made to solve the above problems, an object of the present invention is to provide a vibration detection device that can reduce the measurement error by reducing the friction on the moving guide.

Still another object of the present invention is to provide a vibration detection device capable of implementing stable contact between a probe and a vibration detection object.

Still another object of the present invention is to provide a vibration detection device capable of reducing the measurement error of the vibration sensor by maximally preventing the vibration from the probe from being transmitted to the housing.

Still another object of the present invention is to provide a vibration detection device that can increase the connection durability of the cable by configuring the cable connected to the vibration sensor to be integrally moved with the vibration sensor.

It is still another object of the present invention to provide a vibration detection apparatus capable of reducing electrical noise by electrically insulating a probe and a vibration sensor from other components.

It is still another object of the present invention to provide a vibration detecting apparatus capable of stably supporting a moving guide over a wider range, thereby effectively reducing the pressure on the inner surface of the housing when the bending force acts upon the inclined surface contact of the probe. will be.

In order to achieve the above object, the vibration detection device according to the present invention, the hollow housing, the hollow moving guide inserted into the housing, and the moving guide is installed in the housing for supporting the moving guide A member, an elastic member for applying an elastic force to the moving guide in the housing, a connector provided on one side of the moving guide, a vibration sensor for detecting vibration of a vibration detection object, the vibration sensor, and the connector And a cable connected to the probe, a probe in contact with the vibration detection object, a probe housing coupled to the moving guide to receive the probe, and a probe elastic member disposed between the probe and the probe housing.

Here, the moving guide support member is installed in a pair spaced apart in the housing, the elastic member may be installed between the pair of moving guide support member.

Preferably, the tip portion of the probe is composed of a curved surface.

More preferably, the tip portion of the probe is composed of a spherical surface having a radius of curvature of a predetermined size.

In addition, the vibration detection device, characterized in that the probe elastic member is configured to be interposed between the moving guide and the probe.

Here, the probe elastic member may be made of a synthetic resin material.

On the other hand, the elastic member may be composed of a coil spring.

Preferably, the moving guide support member is composed of a bush.

More preferably, the bush is comprised of a ball bush.

According to the present invention, the measurement error can be reduced by reducing the friction applied to the moving guide.

Further, stable contact between the probe and the vibration detection object can be provided.

In addition, by preventing the vibration from the probe to be transmitted to the housing as much as possible, it is possible to reduce the measurement error of the vibration sensor.

In addition, by configuring the cable connected to the vibration sensor to move together with the vibration sensor, it is possible to further increase the connection durability of the cable.

In addition, by electrically insulating the probe and the vibration sensor from other components, it is possible to reduce the electrical noise.

In addition, by stably supporting the moving guide over a wider range, it is possible to effectively reduce the pressure on the inner surface of the housing when the bending force due to the inclined surface contact of the probe.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms used in the present specification and claims should not be construed in a dictionary meaning, and the inventors may properly define the concept of terms in order to explain their invention in the best way. It should be construed as meaning and concept consistent with the technical spirit of the present invention.

Therefore, the configuration shown in the embodiments and drawings described herein are only preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, it is possible to replace them at the time of the present application It should be understood that various equivalents and variations may exist.

2 is a perspective view of a vibration detection device according to the present invention, Figure 3 is an internal sectional view of the vibration detection device according to the present invention.

2 and 3, the vibration detection apparatus according to the present invention, the hollow housing (10, 12, 14), and the hollow moving guide inserted into the housing (10, 12, 14) ( 20), moving guide support members 30 and 32 installed in the housings 10, 12 and 14 and for supporting the moving guide 20, and the moving in the housings 10, 12 and 14; An elastic member 40 for applying an elastic force to the guide 20, a connector 50 installed on one side of the moving guide 20, a vibration sensor 60 for detecting vibration of a vibration detection object, A cable 62 connected to the vibration sensor 60 and the connector 50, a probe 70 in contact with a vibration detection object, and a moving guide 20 to accommodate the probe 70. Probe housing (90, 92), and probe elastic member (80, 82) disposed between the probe 70 and the probe housing (90, 92).

Here, the housing (10, 12, 14) is a component for accommodating the moving guide 20, the moving guide support member (30, 32) and the elastic member 40, it is composed of a hollow cylinder.

Preferably, the housing (10, 12, 14) of the body portion 10 and the body portion 10 for easy assembly with the components contained in the housing (10, 12, 14) It may be divided into stoppers 12 and 14 coupled at both ends.

Meanwhile, moving guide support members 30 and 32 for supporting the moving guide 20 are disposed in the housings 10, 12, and 14.

Here, the moving guide support member (30, 32) is composed of a pair is installed on both ends in the housing (10, 12, 14), respectively.

Since the moving guide support members 30 and 32 support the horizontal movement of the moving guide 20 due to the vibration transmitted from the vibration inspection object, the vibration measurement error with the moving guide 20 is reduced as much as possible. It is preferable to be configured to reduce the.

Therefore, the moving guide support members 30 and 32 are preferably composed of a pair of bushes, and more preferably, a ball bush.

Thus, due to the low frictional resistance between the moving guide 20 and the moving guide support member 30, 32, vibrations from external devices through the housings 10, 12, 14 are prevented from the probe 70. And reduced transmission to the vibration sensor 60.

In addition, the moving guide support member (30, 32) is configured to support the moving guide 20 over a relatively wide range on both sides of the housing (10, 12, 14), the moving guide 20 and The contact pressure between the moving guide support members 30 and 32 may be further reduced.

On the other hand, the elastic member 40 for elastically supporting the horizontal movement of the moving guide 20 by the horizontal vibration transmitted by the probe 70 is the pair of moving guide support member 30, 32) is installed between.

The probe 70 connected to the moving guide 20 is stably elastically contacted with the surface of the vibration measurement target by the elasticity of the elastic member 40.

Preferably, the elastic member 40 is formed of a coil spring embedded in the housings 10, 12, 14 to elastically support the moving guide 20, but is not limited thereto.

Meanwhile, various connectors 50 such as a BNC connector (British Naval Connector) are installed at one end of the moving guide 20 to connect the cable 62 from the vibration sensor 60.

In addition, the probe housings 90 and 92 are coupled to the other front end portion of the moving guide 20.

The probe housings 90 and 92 are components for accommodating the vibration sensor 60, the probe 70, and the probe elastic members 80 and 82 in a state of being coupled with the moving guide 20.

The probe housings 90 and 92 are also coupled to the moving guide 20 to secure the good assembly of the vibration sensor 60, the probe 70, and the probe elastic members 80 and 82. ) And an opening and closing stopper 92 configured to open and close the coupling unit 90.

The probe 70 is configured to transmit vibration to the vibration sensor 60 in contact with the surface of the vibration inspection object, and is accommodated to protrude outward from the probe housings 90 and 92.

The vibration sensor 60 is a sensor configured to convert a change in acceleration due to vibration into an electrical signal using a piezoelectric element, and is coupled to a rear end of the probe 70 and accommodated in the probe housings 90 and 92. .

In this case, probe elastic members 80 and 82 are interposed between the probe 70 and the probe housing 90 and 92 to electrically insulate the probe 70 from the probe housing 90 and 92, It is configured to attenuate vibrations transmitted from the probe 70 to the probe housings 90 and 92.

The probe elastic member 80 is also interposed between the probe 70 and the moving guide 20 to attenuate the vibration transmitted from the probe 70 to the moving guide 20. Can be configured.

In order to reduce the electrical insulation and vibration as described above, the probe elastic member 80 is preferably made of a synthetic resin material such as rubber.

As described above, the probe 70 is electrically insulated from the moving guide 20 and the probe housings 90 and 92 by the probe elastic member 80 and mechanically separated, thereby transferring the probe 70 to the probe 70. The vibration may be transmitted to the vibration sensor 60 without loss.

In addition, by the probe elastic member 80, vibrations from other devices other than the vibration detection device according to the present invention to the probe 70 and the vibration sensor 60 through the housing (10, 12, 14). By blocking the transmission, the measurement error can be reduced.

On the other hand, the tip portion of the probe 70 is preferably composed of a curved surface, more preferably, is composed of a spherical surface having a curvature radius of a predetermined size.

As described above, the tip portion of the probe 70 has a curved surface, so that even if the vibration measurement target surface is not faced perpendicularly to the tip portion of the probe 70, the tip portion of the probe 70 and the target surface are not. Contact can be a more stable surface contact.

Thus, the vibration from the vibration measuring object is transmitted to the vibration sensor 60 more stably and without loss.

On the other hand, when the vibration measurement target surface does not face perpendicular to the distal end of the probe 70 generates a bending moment with respect to the probe 70, in this case the other end of the probe 70 The elastic members 80 and 82 are supported.

Thus, the bending moment applied to the probe 70 is transmitted to the moving guide 20 in a state that is primarily relaxed by the probe elastic members 80 and 82.

In addition, since the moving guide support members 30 and 32 support the moving guide 20 over a relatively wide range at both sides in the housings 10, 12 and 14, the moving guide due to bending moments ( This prevents excessive pressure rise between the housing 20 and the housings 10, 12, 14.

Therefore, in addition to the probe and the moving guide according to the prior art it is possible not only to implement a more stable contact to the vibration measurement target surface, but also to reduce the occurrence of measurement errors due to friction due to the bending moment.

In addition, the probe elastic member (80, 82) made of a synthetic resin material to electrically insulate the probe 70, the moving guide 20 and the probe housing (90, 92) to reduce the electrical noise accuracy of the measurement Can be made higher.

As described above, the probe 70 is indirectly connected to the probe housings 90 and 92 and the moving guide 20 by the probe elastic members 80 and 82 and the vibration sensor 60. ) Is coupled to the probe 70.

Therefore, when the vibration sensor 60 is displaced by the probe 70, the moving guide 20 and the connector 50, which are indirectly connected thereto, are also integrally displaced.

Therefore, since the cable 62 connecting the vibration sensor 60 and the connector 50 is also integrally displaced together with the vibration sensor 60 and the connector 50, the vibration sensor is relatively displaced with respect to the stationary cable. Compared to the vibration detection apparatus according to the prior art, the durability of the connection of the cable 62 can be further increased.

Hereinafter, an operation process of the vibration detection device according to the present invention.

First, the probe 70 is brought into close contact with the surface of the vibration detection object while the housing body 10 of the vibration detection device according to the present invention is gripped by an actuator.

At this time, the probe 70 is in close contact with the surface of the vibration detection object, the probe housing (90, 92) and the moving guide 20 coupled thereto is displaced in the horizontal direction.

As the elastic member 40 accommodated in the housings 10, 12 and 14 displaces the moving guide 20 displaced as described above, the probe 70 contacts the surface of the vibration detection object at a proper pressure.

At this time, the vibration transmitted through the probe 70 is transmitted to the vibration sensor 60, the electrical signal from the vibration sensor 60 is transmitted to the connector 50 through the cable 62.

When the probe 70 is displaced by vibration, the probe housings 90 and 92 and the moving guide 20 connected to the probe elastic members 80 and 82 are integrally displaced together, and the moving guide ( When the displacement of 20) is supported by the moving guide support members 30 and 32 made of a bush or the like, it is configured to reduce the frictional force.

At this time, the moving guide support member 30, 32 is configured to support the moving guide 20 over a relatively wide range at both sides of the housing (10, 12, 14), the moving guide 20 and The contact pressure between the moving guide support members 30 and 32 may be further reduced.

On the other hand, even if the surface of the probe 70 and the vibration detection object is not exactly in contact with the vertical, the front end portion of the probe 70 is formed by a curved surface can be achieved a more stable surface contact state.

Thus, the vibration transmitted to the probe 70 can be transmitted to the vibration sensor 60 without loss.

In addition, even when a bending force is generated in the probe 70, the probe housings 90 and 92 and the moving guide 20 may be primarily provided in a state in which the bending force is relaxed by the probe elastic members 80 and 82. Since it is transmitted, friction between the moving guide 20 and the moving guide support members 30 and 32 due to the bending force and the vibration thereof may be further reduced.

As mentioned above, although the present invention has been described by way of limited embodiments and drawings, the technical idea of the present invention is not limited thereto, and a person having ordinary skill in the art to which the present invention pertains, Various modifications and variations may be made without departing from the scope of the appended claims.

Since the accompanying drawings are for understanding the technical spirit of the present invention together with the detailed description of the following invention, the present invention should not be construed as limited to the matters shown in the following drawings.

1 is an internal cross-sectional view of a conventional vibration detection device,

2 is a perspective view of a vibration detection device according to the present invention,

3 is an internal sectional view of the vibration detection device according to the present invention.

Explanation of symbols on the main parts of the drawings

10, 12, 14: housing 20: moving guide

30: moving guide support member 40: elastic member

50: connector 60: vibration sensor

70: probe 80, 82: probe elastic member

Claims (9)

A hollow housing; A hollow moving guide inserted into and installed in the housing; Moving guide support members installed at both sides of the housing to support the moving guide; An elastic member disposed between the moving guide support members in the housing to apply an elastic force to the moving guides; A connector installed at one side of the moving guide; A vibration sensor installed at the other side of the moving guide to detect vibration of a vibration detection object; A cable embedded in the moving guide and connected to the vibration sensor and the connector; A probe in contact with the vibration detection object; A probe housing coupled to the vibration sensor side of the moving guide to accommodate the probe; It includes a probe elastic member disposed between the probe and the probe housing, The moving guide support member is composed of a bush, And the connector, the cable, and the vibration sensor are displaced together with the moving guide. The method of claim 1, The moving guide support member is spaced in pairs in the housing, and the elastic member is installed between the pair of moving guide support members. The method of claim 1, Vibration detection device, characterized in that the front end of the probe is composed of a curved surface. The method of claim 3, wherein Vibration detection device, characterized in that the front end portion of the probe is composed of a spherical surface having a curvature radius of a predetermined size. The method of claim 2, And a probe elastic member interposed between the moving guide and the probe. The method of claim 2, The probe elastic member is a vibration detection device, characterized in that composed of a synthetic resin material. The method of claim 2, The elastic member is a vibration detection device, characterized in that consisting of a coil spring. delete The method of claim 2, Vibration detection device, characterized in that the bush is composed of a ball bush.

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