KR20170002137U - Apparatus for checking activity state of motor using piezo-electric vibration sensor - Google Patents

Abstract

According to another aspect of the present invention, there is provided an apparatus for checking an operation state of a motor using a vibration sensor, including a main body, a vibration piezoelectric sensor for sensing vibration generated from the motor and converting the sensed vibration into electric energy, A DC power output unit accommodated in the main body and outputting the converted DC power, and an operation state informing unit informing the operation state of the motor using the DC power source .

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for checking the operation state of an electric motor using a piezoelectric vibration sensor,

The present invention relates to an apparatus for checking the operation state of a motor using a vibration sensor, and more particularly, to an apparatus for generating electric energy using vibration and confirming whether the high-voltage and low-voltage motors are operated on the site.

Generally, many high-voltage or low-voltage motors are applied to the domestic and overseas power plants and industrial plant sites.

However, due to the nature of such an industrial site, there is an inefficiency in that the manager must check the operation state by accessing the motor in order to check whether the motors are operating properly due to the wide area and noise of various facilities.

In this regard, Korean Patent Registration No. 10-0734478 (an apparatus for remote control of a musical instrument musical instrument) detects an internal noise according to the operation of a power transmission apparatus and measures the musical interval within a predetermined scale range. When a musical scale exceeding a predetermined frequency is received, And proposed a technique for notifying that there is a problem in the operation of the device.

In Korean Patent Registration No. 10-1389793 (apparatus and method for monitoring and analyzing an electric motor), electric power is calculated by multiplying current and voltage input to the electric motor, and the calculated electric power is added to the accumulated electric power. A phase difference is obtained by subtracting the phase at the immediately preceding start from the phase of the inputted voltage and current, and thereafter, when the phase difference is larger than a preset phase difference, a technique of determining that there is an abnormality in the start characteristics of the motor is proposed.

In addition, in Korean Patent Laid-Open Publication No. 10-2013-0115977 (preventive maintenance device of a motor), state quantity acquisition means for acquiring a state quantity of a motor having a predetermined correlation with an operation quantity, A model storage means for storing a correlation model in which the relationship between the manipulated variable and the state quantity in the correlation model is modeled in accordance with a correlation, and a correlation model stored in the model storage means for calculating a state quantity for the manipulated variable at the time of operation of the electric motor The model state quantity calculation means and the state quantity obtained by the state quantity acquisition means at the time of operation and the state quantity calculated by the model state quantity calculation means are compared with each other to detect the abnormality of the motor and the auxiliary equipment, And the like.

However, in this conventional technology, there is an inconvenience that a field manager has to visit the installation position of the electric motor in order to check the operation state of the electric motor.

In addition, complicated calculations are required to check the operation state of the electric motor, and the corresponding components must be added, and there is a disadvantage that the inspection time and input labor are required for the maintenance in the future.

In addition, there is a disadvantage in that a separate additional power supply is required to be supplied to the device for checking the operation state of the electric motor, which requires the purchase and installation of a power cable and cost.

Korean Patent Registration No. 10-0734478 Korean Patent Registration No. 10-1389793 Korean Patent Publication No. 10-2013-0115977

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems of the prior art, and it is an object of the present invention to provide a method for easily confirming the operation state of an electric motor near a motor without requiring a field manager to approach the electric motor in order to check the operation state of the electric motor I want to.

Also, it is intended to provide a method for confirming the operation state of the motor by a non-power source which does not use any additional power source.

In order to achieve the above-mentioned object, the present application is directed to a piezoelectric vibration sensor which is housed in a main body, detects a vibration generated from an electric motor, converts the sensed vibration into electric energy, A DC power output unit accommodated in the main body and outputting the converted DC power, and an operation state informing unit informing the operation state of the motor using the DC power outputted from the DC power supply unit.

The vibration-type piezoelectric sensor according to an embodiment of the present application includes a metal film having stiffness and a piezoelectric film coated with an adhesive on the upper surface of the metal film, wherein the metal film is a piezoelectric cantilever whose one end is fixed to the substrate by a fixing member Cantilever structure. When vibration is applied from the outside, electric energy is generated by deformation of the piezoelectric film due to deformation of the metal film.

According to an embodiment of the present application, a field manager can easily confirm the operation state of the electric motor in the vicinity of the electric motor without having to approach the electric motor in order to check the operation state of the electric motor.

Also, the checking time and the input attraction force consumed for checking the operation state of the electric motor can be reduced.

In addition, it is possible to reduce the cost of purchasing and installing the power cable by checking the operation state of the motor by using the self-generated power source that directly produces the vibration without using the additional power source.

It is to be understood that the effect of this application is not limited to the effects set forth above, but includes all conceivable effects from the description of the application or from the composition of the items recited in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an application of an apparatus for checking the operation state of a motor using a vibration sensor according to an embodiment of the present application; FIG.
2 is a view schematically showing the inside of a device for checking the operation status of a motor using the vibration sensor shown in FIG.
FIG. 3A is a plan view showing the structure of a vibration-type piezoelectric sensor according to an embodiment of the present application; FIG.
3B is a side view showing the structure of a vibration-type piezoelectric sensor according to an embodiment of this application.
4 is a perspective exploded view of a vibrating piezoelectric sensor according to another embodiment of this application.
5 is a perspective view of a vibrating piezoelectric sensor according to another embodiment of this application.
6 is a block diagram showing a configuration of an apparatus for checking the operation state of a motor using a vibration sensor according to an embodiment of the present application;
7 is a block diagram showing a configuration of an apparatus for checking the operation state of a motor using a vibration sensor according to another embodiment of the present application;
8 is a view showing an application of an apparatus for checking the operation state of a motor using a vibration sensor according to an embodiment of the present application.

This invention will now be described with reference to the accompanying drawings. This application, however, may be embodied in many different forms and is not thus limited to the embodiments described herein.

In order to clearly illustrate the invention in the drawings, parts not related to the description are omitted, and like reference numerals are given to similar parts throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" .

Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a view showing an application of an apparatus for checking the operation state of a motor using a vibration piezoelectric sensor according to an embodiment of the present application. FIG. 2 is a schematic view of an apparatus for checking the operation state of a motor using the vibration- Fig.

1, an apparatus for checking the operation state of an electric motor 100 using a vibration sensor according to an embodiment of the present invention includes a high-voltage or low-voltage electric motor (hereinafter referred to as " (Hereinafter referred to as an " electric motor ") 10.

For reference, when it is difficult to directly attach to the electric motor 10, the electric motor operation state checking device 100 may be attached to a junction box around the electric motor 10.

Referring to FIG. 2, the apparatus 100 for detecting the operating condition of the electric motor 100 may detect the vibration transmitted from the electric motor 10 by the vibration sensor 120, And the generated electric energy is converted into direct current power through the rectifying unit 130 and then supplied to the operation state informing unit 150 such as a lamp through the direct current power output unit 140 to be supplied to the operation state informing unit 150, .

That is, when the motor 10 normally operates (the constant vibration intensity and the frequency are output), the motor operation state checking device 100 causes the operation state informing part 150 to emit light. When the operation of the motor 10 is stopped The operation state notification unit 150 of the motor operation state checking apparatus 100 can no longer emit light so that the operation state of the motor 10 can be easily confirmed.

For reference, the electric motor operation state checking apparatus 100 charges electric energy (not shown) in a battery (not shown) included in the motor operation state checking apparatus 100 using electric energy generated in a state where the electric motor 10 normally operates You may.

When the electric motor operation state checking device 100 includes a wireless communication module (not shown), the electric motor operation state checking device 100 detects the operation state of the wireless communication module (not shown) by using electric energy charged in a battery To transmit the operating state of the motor 10 to a terminal (not shown) of the manager using a wireless communication method such as Wi-Fi or Bluetooth.

Hereinafter, the structure of the vibration-type piezoelectric sensor 120 in the configuration of the motor operation state checking apparatus 100 will be described in detail with reference to FIGS. 3A, 3B, 4 and 5. FIG.

3A and 3B are views showing the structure of a vibration-type piezoelectric sensor 120 according to one embodiment of the present application, wherein FIG. 3A is a plan view of the vibration-type piezoelectric sensor 120 and FIG. 3B is a side view of the vibration-type piezoelectric sensor.

The vibration-type piezoelectric sensor 120 according to an embodiment of the present application may include a metal film 121, a piezoelectric film 122, and a fixing member 123.

The metal film 121 has stiffness and the piezoelectric film 122 can be coated with an adhesive on the upper surface of the metal film 121 and the positive and negative electrodes Can be formed. To this end, as shown in the figure, a piezoelectric film 122 is provided on a plate-shaped metal film 121 fixed to the coupling part 124a with a cantilever structure, The + electrode piezoelectric film 122a to which the + electrode is connected and the-electrode piezoelectric film 122b to which the - electrode is connected are adhered to the metal film 121 by the adhesive in the assembled state. Meanwhile, in the process of attaching the piezoelectric film 122 to the metal film 121, a coating layer 122d is formed by coating with the adhesive around the piezoelectric film 122, as shown in FIG. 3A. The piezoelectric film 122 has an arcuate space 122c so that a part of the electrode piezoelectric film 122b may be exposed in a semicircular shape for connecting the electrode to one side of the positive electrode film 122a .

The vibrating piezoelectric sensor 120 may have a piezoelectric cantilever structure in which one end of the metal film 121 is fixed to the substrate 112 of the vibration sensing device 100 by a fixing member 123.

The fixing member 123 may be formed at one end of the metal film 121. The fixing member 123 penetrates through the coupling hole 121a of the metal film 121, Can be coupled to the substrate 112 (for example, the coupling portion 112a protruding from the substrate) of the operation state checking apparatus 100 to maintain the cantilever shape. For reference, the fixing member 123 may include a bolt or the like.

When external vibration is applied, the metal film 121 is deformed by vibration, and electrical energy can be generated by deformation of the piezoelectric film 122 as the metal film 121 is deformed.

4 is a perspective exploded view of the vibration-type piezoelectric sensor 120 shown in FIG.

A piezoelectric film 122 is disposed on the upper surface of the metal film 121 and a coupling hole 121a is formed on one end of the metal film 121 for coupling with the fixing member 123.

A base plate 124 is disposed between the substrate 112 and the metal film 121 of the apparatus 100 to fix the metal film 121 to the substrate 112. The base plate 124, Sensor 120 as shown in FIG.

The fixing member 123 may be coupled to the base plate 124 through the coupling hole 121a of the metal film 121. [

Here, the base plate 124 may be provided with a coupling portion 124a having a constant height for allowing the vibration sensor 120 to maintain a cantilever shape at a position where the fixing member 123 is coupled.

Although not shown in FIG. 4, the other end of the metal film 121 may have a shape of a unimorph or bimorph type with a mass having a proof mass attached thereto.

5 is a perspective view of a vibration-type piezoelectric sensor 120 according to another embodiment of the present application, in which the elastic member 125 is further included.

The elastic member 125 has one end coupled to the base plate 124 and the other end coupled to one end of the metal film 121 so that the vibration of the piezoelectric sensor 120 is maximized, Can be easily generated.

FIG. 6 is a block diagram showing a configuration of an electric motor operation state checking apparatus according to an embodiment of the present application.

The apparatus for checking the operation state of an electric motor 100 according to an embodiment of the present invention includes a main body 110, a vibration sensor 120, a rectifier 130, a DC power output unit 140, And the components may be respectively disposed on the substrate 112 of the motor operating condition determining device 100 disposed inside the main body 110. [

Describing each component, the main body 110 provides a space in which the components of the motor operation state checking device 100 are accommodated, and can protect the components from external shocks and contamination.

For reference, a plurality of stationary magnets (not shown) may be formed on the rear surface of the main body so that the motor operation state checking device 100 is mounted on one surface of the motor 10. [

On the other hand, the vibration sensor 120 can sense the vibration generated from the motor 10 and convert the sensed vibration into electric energy.

A suitable material of the vibration sensor 120 may include a piezoelectric ceramic, a polymer, or a composite material thereof. The vibration piezoelectric device and the unit module, which are designed for maximizing energy conversion efficiency, , And an optimal matching circuit.

In addition, the vibrating piezoelectric sensor 120 may include a piezoelectric cantilever structure as shown in FIG.

The structure of the vibration-type piezoelectric sensor 120 is described with reference to FIG. 3 and FIG.

For reference, it is preferable that the vibration frequency of the vibration-type piezoelectric sensor 120 is set to coincide with the vibration frequency of the electric motor 10.

When the motor 10 is in the normal operation state, the frequency waveform of the vibration external force applied to the vibration sensor 120 is constant (for example, 120 Hz), and the vibration intensity and the vibration frequency are set to correspond to the electric motor 10 The vibration-type piezoelectric sensor 120 can continuously generate electric energy as long as the electric motor 10 does not stop.

On the other hand, the rectifying unit 130 can convert the self-generated power generated by the vibration sensor 120, that is, electric energy into direct current.

The outputs of the (+) and (-) poles of the vibration sensor 120 can be directly connected to the rectifier 130 and converted into a DC power source (for example, DC 2 to 5 V).

The DC power output unit 140 may output the DC power converted by the rectifier unit 130 and the DC power may be supplied to the operation status notification unit 150 so that the operation status notification unit 150 It can be diverted.

On the other hand, the operation state informing unit 150 may indicate whether the electric motor 10 is operating or not, and may include a high-brightness LED or a generally used light bulb.

That is, when the electric motor 10 normally operates, the operation state informing unit 150 uses the power supplied through the vibration piezoelectric sensor 120, the rectifying unit 130, and the DC power output unit 140 to continuously Can radiate light.

However, when the operation of the electric motor 10 is interrupted, the vibration sensor 120 can not detect any more vibration from the electric motor and thus can not generate electric energy. Therefore, the rectifier 130 and the DC power output unit 140, It can not emit light.

In addition, the operation state informing unit 150 may further include sound output means such as a speaker as well as the high-brightness LED or a generally used light bulb.

As described above, the electric motor operation state checking apparatus 100 according to the embodiment of the present application is an electric power non-power generating system which can not only generate no electromagnetic noise but can be used semi-permanently, Can be generated

In addition, since the field manager can easily confirm the operation state of the electric motor around the electric motor without needing to approach the electric motor in order to check the operation state of the electric motor, the check time consumed to check the operation state of the electric motor, Can be reduced.

FIG. 7 is a block diagram showing the configuration of an electric motor operation state checking device according to another embodiment of the present application.

The apparatus for checking the operation state of an electric motor 100 according to an embodiment of the present invention includes a main body 110, a vibration sensor 120, a rectifier 130, a DC power output unit 140, A battery 160 and a wireless communication unit 170. The components may be disposed on the substrate 112 of the apparatus 100 for detecting the operating condition of the motor 100 disposed inside the main body 110,

For reference, the battery 160 and the wireless communication unit 170 may be disposed on the substrate 112, but are illustrated in FIG. 7 to illustrate the difference from the embodiment shown in FIG.

The main body 110, the vibration sensor 120, the rectifying unit 130, the DC power output unit 140, and the operating status informing unit 150 of the components shown in FIG. 7 are connected to the components shown in FIG. 6 And the battery 160 and the wireless communication unit 170 are further added.

The power output from the DC power output unit 140 may be supplied to the operation state notification unit 150 to emit light, but the battery 160 may be charged with electric energy.

When the operation state notification unit 150 further includes sound output means such as a speaker as well as the high-brightness LED or a generally used light bulb, a control unit (not shown) of the vibration sensing apparatus 100 may be connected to the battery 160 The operation state notification unit 150 may notify the user that the operation of the electric motor 10 has been interrupted.

The wireless communication unit 170 can transmit the operation state of the motor 10 to a terminal (not shown) of the manager using a wireless communication method such as Wi-Fi or Bluetooth using the electric energy charged in the battery 160.

To this end, the control unit (not shown) of the motor operation state checking apparatus 100 may not detect the vibration of the electric motor 10 by the vibration sensor 120, A message informing that the electric motor 10 is not operating can be transmitted through the wireless communication unit 170 to a predetermined terminal (not shown) of the manager.

Of course, even when the electric motor 10 normally operates, the operation state of the electric motor can be confirmed from time to time by the manager periodically transmitting the operation state to the terminal (not shown) of the manager.

For reference, the wireless communication method of the wireless communication unit 170 is not limited to the Wi-Fi and the Bluetooth, but may be a mobile communication network (3G, LTE) according to an embodiment.

FIG. 8 is a diagram showing an application of the device operation state checking apparatus 100 according to the embodiment of the present application.

8, the operation state informing unit 150 may be integrally coupled to one surface of the main body 110, and may be connected to the main body 110 through a wire having a predetermined length, As shown in FIG.

That is, when the electric motor 10 is in the open position, the operation state notification unit 150 of the motor operation state checking device 100, which is mounted on one surface of the electric motor 10, The operation status notification unit 150 is connected to the main body 110 by a wire having a predetermined length and is disposed at a position where the manager can easily check the operation status of the motor 10 due to surrounding facilities or other obstacles can do.

It is to be understood that the foregoing description of the application is for illustrative purposes only and that those of ordinary skill in the art to which this application belongs may understand that other embodiments may be readily devised without departing from the spirit or essential characteristics of this application will be.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present application is defined by the appended claims and all changes or modifications derived from the meaning and scope of the claims and their equivalents shall be construed as being included within the scope of this application.

100: motor operating condition check device 110:
120: Vibrating Piezoelectric Sensor 121: Metal Film
121a: bonding hole 122: piezoelectric film
123: fixing member 124: base plate
124a: Coupling portion 130:
140: DC power output unit 150: Operation status notification unit
160: Storage battery 170:

Claims (5)

An apparatus for checking an operation state of a motor for detecting a vibration occurring in the motor at a site where the motor is installed to check whether the motor operates normally,
A body provided with a plurality of stationary magnets for mounting on one surface of the electric motor in a box shape;
A substrate provided inside the body and having a coupling part on one side;
A plurality of base plates spaced apart from each other at a joint portion formed on the substrate,
A plurality of metal films each having a plate-shaped rigidity fixed to one end of each of the coupling portions of the base plate, the positive electrode piezoelectric film and the negative electrode piezoelectric film being adhered to each other on the metal film, A plurality of piezoelectric films formed on the one side of the + electrode piezoelectric film with arcs spaced so as to expose a part of the-electrode piezoelectric film in a semicircular shape for connection of the negative electrode, and a plurality of piezoelectric films, And a coating layer formed around the piezoelectric film so as to be coated with an adhesive, wherein the coating layer is accommodated in the main body and detects vibrations generated from the electric motor and converts the vibration sensed by the electric motor into electric energy A plurality of vibration piezoelectric sensors set to a vibration frequency coinciding with the vibration frequency of the motor ;
A fixing member installed so that each of the metal films is fixed to each of the coupling portions formed on the corresponding base plate;
An elastic member having one end coupled to the base plate and the other end coupled to one side of the metal film;
A plurality of rectifying units accommodated in the main body and converting electric energy generated in the respective vibration piezoelectric sensors into direct current;
A DC power output unit accommodated in the main body and outputting DC power converted by each of the rectifying units; And
An operation state informing unit informing an operation state of the electric motor by using the direct current power outputted from the direct current power output unit; And a controller for detecting the operation state of the motor using the vibration sensor. The method according to claim 1,
Wherein the operation state informing unit is coupled to one surface of the main body or is connected to the main body by a wire of a predetermined length and informs the operation state of the motor by using at least one of light and sound, Operation status check device. The method according to claim 1,
A battery accommodated in the main body and charging the output DC power; Further comprising a vibration sensor for detecting the operation state of the motor. The method of claim 3,
A wireless communication unit accommodated in the main body and transmitting an operation state of the motor to a terminal of a manager using a wireless communication method using electric energy charged in the battery; Further comprising a vibration sensor for detecting the operation state of the motor. The method of claim 3,
Wherein the operation state informing unit informs that the operation of the electric motor is stopped by using the electric energy charged in the battery when the operation of the electric motor is stopped.

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