JP2016164500A - Vibration measuring device and vibration measuring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration measuring device of which installation on an object to be measured is all that is needed to measure vibration of the object to be measured, and to provide a vibration measuring system including the vibration measuring device.SOLUTION: A vibration measuring device 1 is fixed to an object M to be measured, to measure vibration of the object to be measured. The vibration measuring device 1 includes: a stationary magnet 13; a moving magnet 12; a piezo element 11; and a sensor. The stationary magnet 13 does not move relatively to the object M to be measured, while the vibration measuring device 1 is fixed to the object M to be measured. The moving magnet 12 can move relatively to the stationary magnet 13. The piezo element 11 includes: a first portion fixed to the stationary magnet 13; and a second portion fixed to the first movable part (moving magnet), and different from the first portion. Vibration of the second portion causes the piezo element to generate electric power. The sensor detects vibration of the object M to be measured using the electric power generated by the piezo element 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration measuring device and a vibration measuring system.

  Japanese Patent Laying-Open No. 2009-41465 (Patent Document 1) discloses a vibrometer that measures the vibration of a vertical shaft pump provided with an underwater bearing. This vibration meter is installed in the suspension pipe and measures the magnitude of the vibration of the vertical shaft pump. This vibrometer is connected to the monitoring unit via a cable.

JP 2009-41465 A

  In order for the vibration measuring device to measure the vibration of the measurement object, electric power is required. If this electric power is to be supplied from an external power source, an external power source and wiring connecting the external power source and the vibration measuring device are required. Therefore, work other than the installation of the vibration measuring device on the measurement object occurs, requiring labor and time.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vibration measurement device that can measure vibrations simply by being installed on a measurement object, and the vibration measurement device. It is to provide a vibration measurement system.

  In summary, the present invention is a vibration measurement device that is fixed to a measurement object and measures the vibration of the measurement object. The vibration measuring device includes a fixed portion, a first movable portion, a first piezo element, and a sensor. The fixing unit is not displaced relative to the measurement object while the vibration measurement device is fixed to the measurement object. The first movable part can be displaced relative to the fixed part. The first piezoelectric element includes a first part fixed to the fixed part and a second part different from the first part fixed to the first movable part, and the second part vibrates. To generate electricity. The sensor detects the vibration of the measurement object using the electric power generated by the first piezo element.

Preferably, the vibration direction of the measurement object matches the vibration direction of the second part.
Preferably, the first movable part includes a first magnet. The fixing portion includes a second magnet. The first magnet and the second magnet face each other along the vibration direction of the second portion of the first piezo element.

Preferably, the first movable part includes a weight.
Preferably, the vibration measuring device further includes an elastic member including one end fixed to the fixed portion and the other end fixed to the first movable portion or the second portion of the first piezoelectric element. The elastic member expands and contracts along the vibration direction of the second portion of the first piezo element.

  Preferably, the elastic member is a tension coil spring or a compression coil spring. The elastic member may be an air spring.

  Preferably, the vibration measuring device further includes a second movable part and a second piezo element. The second movable part can be displaced relative to the fixed part. The second piezo element includes a first part fixed to the fixed part and a second part different from the first part fixed to the second movable part, and the second part vibrates. To generate electricity. The sensor detects the vibration of the measurement object using the power generated by the first piezo element and the power generated by the second piezo element.

  Preferably, the vibration measuring device further includes a first elastic member and a second elastic member. The first elastic member includes one end fixed to the first elastic member and the fixed portion, and the other end fixed to the first movable portion or the second portion of the first piezoelectric element. The second elastic member includes one end fixed to the fixed portion and the other end fixed to the second movable portion or the second portion of the second piezoelectric element. The first movable part includes a first magnet. The second movable part includes a second magnet. The first magnet and the second magnet face each other along the vibration direction of the second portion of the first piezo element.

  Preferably, the fixing portion includes a housing. The first piezo element and the sensor are fixed inside the housing. The first movable part is displaced inside the housing.

Preferably, the sensor is an acceleration sensor.
Preferably, the vibration measurement device further includes a communication unit that wirelessly communicates the detection value of the sensor using the electric power generated by the vibration measurement device.

  In other words, another aspect of the present invention is a vibration measurement system including a vibration measurement device including the communication unit, a data collection device, a data management device, and a data analysis device. The data collection device receives data related to the vibration of the measurement object from the vibration measurement device. The data management device receives data from the data collection device. The data analysis device receives data from the data management device.

  Preferably, the data analysis device determines whether or not abnormal vibration has occurred based on the analysis result of the data, displays the determination result, stores the analysis result and the determination result, and performs analysis. Is sent to the data management device.

  Preferably, the vibration measurement system further includes a browsing terminal that receives the analysis result and the determination result from the data analysis device. The browsing terminal displays the received analysis result and determination result.

  Preferably, the data relating to vibration includes an identifier for identifying the vibration measuring device that has measured the vibration.

  According to the present invention, since the sensor is operated using the power generated by self-power generation using the vibration of the measurement object, the external power supply and the wiring connecting the vibration measurement device and the external power supply become unnecessary, and measurement is performed. The vibration can be measured simply by installing a vibration measuring device on the object.

It is a figure which shows the structure of the vibration measuring device according to 1st Embodiment. It is a functional block diagram mounted on the electric circuit board. It is a figure which shows the structure of the vibration measuring device according to the modification of 1st Embodiment. It is a functional block diagram of an RFID tag, an electric circuit board, and a reader / writer. It is a figure which shows the structure of the vibration measuring device according to 2nd Embodiment. It is a figure which shows the structure of the vibration measuring device according to the modification of 2nd Embodiment. It is a figure which shows the structure of the vibration measuring device according to 3rd Embodiment. It is a figure which shows the structure of the vibration measuring device according to 4th Embodiment. It is a figure which shows the outline of a structure of the vibration measurement system according to 5th Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[First Embodiment]
FIG. 1 is a diagram showing a structure of a vibration measuring apparatus 1 according to the first embodiment. Referring to FIG. 1, a vibration measuring device 1 is a device that is fixed to a measuring object M with a screw and measures the vibration of the measuring object M, and includes a fixture 10, a piezo film 11, a movable magnet. 12, a fixed magnet 13, an electric circuit board 14, a coaxial cable 15, an output cable 16, a housing 17, a housing lid 18, and an antenna 19.

  The bottom surface portion of the housing 17 is fixed to the measurement object M, and the top surface portion is open. The housing lid 18 is fixed to the upper surface portion of the housing 17 and covers the opening portion.

  The electric circuit board 14 is fixed inside the housing 17. The antenna 19 is fixed to the housing lid 18. One end of the coaxial cable 15 is connected to the antenna 19. The other end of the coaxial cable 15 is connected to the electric circuit board 14. A signal received by the antenna 19 is transmitted through the coaxial cable 15 to a communication circuit 148 (see FIG. 2) on the electric circuit board 14 described later. A signal emitted from the communication circuit 148 is transmitted to the outside from the antenna 19 through the coaxial cable 15.

  The housing 17 and the housing lid 18 are preferably made of metal for transmission of vibration and shielding of external electromagnetic noise.

  It is desirable that the electric circuit board 14 be molded with, for example, a thermosetting resin after being fixed inside the housing 17.

  The fixture 10 is fixed inside the housing 17. One end of the piezo film 11 is fixed to a fixture 10. The movable magnet 12 is fixed to the surface of the other end portion of the piezo film 11 facing the bottom surface portion of the housing 17. The fixed magnet 13 is fixed to the bottom surface portion of the housing 17 such that the south pole faces the movable magnet 12. The movable magnet 12 and the fixed magnet 13 may be configured so that the same magnetic poles face each other, and the N poles face each other. One end of the output cable 16 is connected to the piezo film 11, and the other end is connected to the electric circuit board 14.

  In the first embodiment, the movable part includes a movable magnet 12, and the fixed part includes a fixture 10, a fixed magnet 13, and a housing 17.

  It is desirable that the force of repulsion between the movable magnet 12 and the fixed magnet 13 and the gravity acting on the movable magnet 12 are balanced in the stationary state of the measuring object M. For this reason, the weight of the movable magnet 12 and the movable magnet 12 are movable. The air gap and magnetic force between the magnet 12 and the fixed magnet 13 may be adjusted. This is because the force is balanced at the neutral position, so that when it receives external vibration in the repulsion direction, it tends to be displaced in either direction.

  As the movable magnet 12 and the fixed magnet 13, it is conceivable to use rare earth, ferrite, or alnico permanent magnets. The permanent magnet may be a sintered magnet, a rubber magnet, or a bonded magnet.

  When the measurement object M vibrates, the movable magnet 12 also vibrates accordingly. At that time, force is repeatedly applied in the vicinity of the portion of the piezo film 11 fixed to the fixture 10, and the portion is repeatedly distorted. As a result, the piezo film 11 supplies an alternating current to the electric circuit board 14 through the output cable 16.

  FIG. 2 is a functional block diagram mounted on the electric circuit board 14. Referring to FIG. 2, electric circuit board 14 includes full-wave rectifier circuit 141, smoothing circuit 142, booster circuits 143 and 144, microcomputer 145, power storage circuit 146, acceleration sensor 147, and communication circuit 148. Including.

  The alternating current from the piezo film 11 is converted into a direct current by the full-wave rectifier circuit 141 and then smoothed by the smoothing circuit 142. A choke coil may be provided as an inductor after the smoothing circuit 142. A part of the direct current smoothed by the smoothing circuit 142 is boosted to a desired voltage by the boosting circuit 143 and then supplied to the microcomputer 145 and the communication circuit 148. The other DC current smoothed by the smoothing circuit 142 is supplied to the power storage circuit 146, and then boosted by the boosting circuit 144 as necessary and supplied to the acceleration sensor 147.

  Data relating to vibration detected by the acceleration sensor 147 (hereinafter also simply referred to as “vibration data”) is recorded in a recording medium such as a RAM (Random Access Memory) included in the microcomputer 145. Information (hereinafter, also referred to as “ID”) that can identify the vibration measuring device 1 such as a serial number or a point where the vibration measuring device 1 is installed is recorded on the recording medium.

  The communication circuit 148 transmits the vibration data recorded in the microcomputer 145 to the outside from the antenna 19 together with the ID. Further, the communication circuit 148 receives an external signal through the antenna 19. As wireless communication performed by the communication circuit 148, a communication method compliant with a communication standard such as a wireless local area network (LAN), WiFi (registered trademark), Bluetooth (registered trademark), or ZigBee (registered trademark) is used. Can do.

  The microcomputer 145 may be activated when a predetermined signal is received, usually in a power saving standby state.

  The measurement of the vibration of the measuring object M may be automatically performed at a predetermined date and time or at a predetermined interval based on a program recorded in the microcomputer 145. It is desirable that the predetermined date and time and the predetermined interval can be changed. The measurement of the vibration of the measuring object M may be performed when the microcomputer 145 receives a predetermined signal.

An electric double layer capacitor or a secondary battery can be used for the power storage circuit 146.
The bypass capacitor for the power supply line used for the electric circuit on the electric circuit board 14 can be made of ceramic or film.

  The acceleration sensor 147 may be mounted on the electric circuit board 14 as a surface mounting type piezoceramic, or may be fixed to the housing 17 or the housing lid 18 and attached to the fixed base. .

  It is desirable to mount a filter circuit on the electric circuit board 14. The filter circuit constitutes a bandpass filter in which a certain frequency band is set in order to extract the natural frequency of the measurement object M or the frequencies before and after the natural frequency. The filter circuit may be a combination of a high pass filter and a low pass filter.

  The AC signal output from the acceleration sensor 147 is amplified by an operational amplifier circuit (not shown), and a signal having a desired frequency is extracted from the amplified signal using the filter circuit described above. The extracted signal is preferably recorded in the microcomputer 145 after an analog signal is converted into a digital signal by an AD converter (not shown).

  In order to operate the acceleration sensor 147, it is necessary to supply power to the acceleration sensor 147. One method for supplying power is to supply power from an external power source. However, in order to supply power from an external power source, it is necessary to prepare the power source outside the vibration measuring device 1. Further, wiring for connecting an external power source and the vibration measuring device 1 is required. Therefore, the vibration cannot be measured simply by installing the vibration measuring apparatus 1 on the measurement object M.

  In the first embodiment, by providing the piezo film 11 that performs self-power generation using the vibration of the measurement object M as described above, the acceleration sensor 147 receives self-power generation without receiving external power supply. Can be operated with the power.

  This eliminates the need for an external power source and wiring for connecting the external power source and the vibration measuring device 1, and the vibration can be measured simply by installing the vibration measuring device 1 on the measurement object M.

  Furthermore, since the vibration measuring apparatus 1 can wirelessly communicate with the outside, there is no need for wiring for communication, and analysis of vibration data in a remote place is facilitated.

[Modification of First Embodiment]
In the first embodiment, the example of the configuration in which the communication circuit 148 and the antenna 19 perform wireless communication has been described. In this modification, an example in which wireless communication is performed by an RFID tag based on an RFID (Radio Frequency IDentifier) method will be described. Hereinafter, the RFID tag 13A, the electric circuit board 14A, and the reader / writer 40, which are characteristic in the modification of the first embodiment, will be described. Since other configurations are the same as those of the first embodiment, description thereof will not be repeated.

  FIG. 3 is a diagram showing a structure of a vibration measuring apparatus 1A according to a modification of the first embodiment. Referring to FIG. 3, RFID tag 13A is fixed on electric circuit board 14A.

  FIG. 4 is a functional block diagram of the RFID tag 13A, the electric circuit board 14A, and the reader / writer 40. Referring to FIG. 4, RFID tag 13A is connected to electric circuit board 14A in place of communication circuit 148 in the first embodiment.

  The RFID tag 13A includes an IC chip 131 and an antenna 132. The IC chip 131 is connected to the microcomputer 145. The antenna 132 is connected to the IC chip 131. The RFID tag 13A may be an active type, a passive type, or a semi-active type. The communication method of the RFID tag 13A may be either an electromagnetic induction method or a radio wave method.

  The IC chip 131 has a memory (not shown). The IC chip 131 uses the antenna 132 to transmit data stored in the memory in the IC chip 131 to the reader / writer 40 and to store data received from the reader / writer 40 in the memory.

  The reader / writer 40 includes a PDA (Personal Digital Assistant) 401 and an antenna 402. The antenna 402 is connected to the PDA 401. The PDA 401 uses the antenna 402 to read data from the RFID tag 13A and write data to the RFID tag 13A.

  The RFID tag 13 </ b> A stores the vibration data recorded in the microcomputer 145 in the memory in the IC chip 131 when there is a read access from the reader / writer 40. The RFID tag 13A transmits vibration data stored in the memory of the IC chip 131 from the antenna 132 to the reader / writer 40.

  When there is a write access from the reader / writer 40, the RFID tag 13A stores the data from the reader / writer 40 in the memory of the IC chip 131. Then, the RFID tag 13A transmits data stored in the memory of the IC chip 131 to the microcomputer 145.

  Also in the modification of the first embodiment, the vibration measuring apparatus 1A can drive the electric circuit board 14A and the RFID tag 13A using the electric power generated by the piezo film 11.

  This eliminates the need for an external power source and wiring for connecting the external power source and the vibration measuring device 1A, and the vibration can be measured simply by installing the vibration measuring device 1A on the measurement object M.

  Furthermore, since the vibration measuring apparatus 1A can perform wireless communication with the outside, wiring for communication is not necessary, and vibration data in a remote place can be easily analyzed.

[Second Embodiment]
In the first embodiment, the movable magnet 12 and the fixed magnet 13 are provided, and the vibration of the movable magnet 12 is amplified by the magnetic force generated between the movable magnet 12 and the fixed magnet 13. In the second embodiment, a configuration will be described in which the movable portion includes a weight instead of a magnet, and the vibration of the weight is amplified by an elastic member.

  FIG. 5 is a diagram showing the structure of the vibration measuring apparatus 2 according to the second embodiment. The vibration measuring device 2 shown in FIG. 5 includes a weight 22 and a tension coil spring 23 instead of the movable magnet 12 and the fixed magnet 13 shown in FIG. Below, the characteristic weight 22 and the tension coil spring 23 in 2nd Embodiment are demonstrated. Since other configurations are the same as those in the first embodiment, description thereof will not be repeated.

  Referring to FIG. 5, one end of piezo film 11 is fixed to fixture 10. A weight 22 is fixed to a surface of the other end portion of the piezo film 11 facing the bottom surface portion of the housing 17. One end of the tension coil spring 23 is fixed to the housing lid 18, and the other end is fixed to the piezo film 11.

  It is desirable that the gravity acting on the weight 22 and the restoring force of the tension coil spring 23 are balanced in the stationary state of the measuring object M. For this reason, the weight of the weight 22 and the spring constant of the tension coil spring 23 are determined. Adjust it. This is because the force is balanced at the neutral position, so that when it receives external vibration in the repulsion direction, it tends to be displaced in either direction.

  When the measuring object M vibrates, the weight 22 also vibrates accordingly. As a result, as in the first embodiment, the piezo film 11 supplies an alternating current to the electric circuit board 14 through the output cable 16.

  Furthermore, since the vibration measuring device 2 can perform wireless communication with the outside, there is no need for wiring for communication, and analysis of vibration data in a remote place is facilitated.

  In the second embodiment, the movable part includes the weight 22, and the fixed part includes the fixture 10, the housing 17, and the housing lid 18.

  Also in the second embodiment, the vibration measuring device 2 can use the electric power generated by the piezo film 11, so that there is no need for an external power source and a wiring connecting the external power source and the vibration measuring device 2. The vibration can be measured simply by installing the vibration measuring device 2 on the measuring object M.

  Furthermore, since the vibration measuring device 2 can perform wireless communication with the outside, there is no need for wiring for communication, and analysis of vibration data in a remote place is facilitated.

[Modification of Second Embodiment]
FIG. 6 is a diagram showing a structure of a vibration measuring apparatus 2A according to a modification of the second embodiment. With reference to FIG. 6, in a modification of the second embodiment, vibration measurement apparatus 2 </ b> A includes weight 22 </ b> A and compression coil spring 23 </ b> A instead of weight 22 and tension coil spring 23 in FIG. 5. One end of the piezo film 11 is fixed to a fixture 10. A weight 22A is fixed to the surface of the other end of the piezo film 11 facing the housing lid 18. One end of the compression coil spring 23 </ b> A is fixed to the bottom surface portion of the housing 17, and the other end is fixed to the piezo film 11.

  It is desirable that the gravity acting on the weight 22A and the restoring force of the compression coil spring 23A are balanced in the stationary state of the measuring object M. For this purpose, the weight of the weight 22A and the spring constant of the compression coil spring 23A are adjusted. Good. This is because the force is balanced at the neutral position, so that when it receives external vibration in the repulsion direction, it tends to be displaced in either direction.

  In the modification of the second embodiment, when the measurement object M vibrates, the weight 22A also vibrates. As a result, the piezo film 11 supplies an alternating current to the electric circuit board 14 through the output cable 16.

  In the modified example of the second embodiment, the movable part includes a weight 22 </ b> A, and the fixed part includes the fixture 10 and the housing 17.

  Since the vibration measuring device 2A can use the electric power generated by the piezo film 11, an external power source and a wiring connecting the external power source and the vibration measuring device 2A are not required, and vibration measurement is performed on the measurement object M. The vibration can be measured only by installing the device 2A.

  Furthermore, since the vibration measuring device 2A can wirelessly communicate with the outside, there is no need for wiring for communication, and analysis of vibration data in a remote place is facilitated.

[Third Embodiment]
In the first embodiment, the vibration of the movable part is amplified by a magnet, and in the second embodiment by an elastic member. In the third embodiment, a configuration for amplifying the vibration of the movable part using a magnet and an elastic member will be described.

  FIG. 7 is a diagram showing the structure of the vibration measuring device 3 according to the third embodiment. Referring to FIG. 7, the vibration measuring device 3 is obtained by adding a compression coil spring 34 to the first embodiment. Since other configurations are the same as those of the first embodiment, description thereof will not be repeated.

  One end of the compression coil spring 34 is fixed to the housing lid 18, and the other end is fixed to the piezo film 11.

  It is desirable that the repulsive force of the movable magnet 12 and the fixed magnet 13 and the restoring force of the compression coil spring 34 are balanced in the stationary state of the measurement object M. For this reason, the movable magnet 12 and the fixed magnet 13 The air gap and magnetic force between them and the spring constant of the compression coil spring 34 may be adjusted. This is because the force is balanced at the neutral position, so that when it receives external vibration in the repulsion direction, it tends to be displaced in either direction.

  In the third embodiment, the movable part includes the movable magnet 12, and the fixed part includes the fixture 10, the fixed magnet 13, the housing 17, and the housing lid 18.

  Also in the third embodiment, when the measurement object M vibrates, the movable magnet 12 also vibrates accordingly. As a result, the piezo film 11 supplies an alternating current to the electric circuit board 14 through the output cable 16.

  Also in the third embodiment, since the vibration measuring device 3 can use the power generated by the piezo film 11, an external power source and wiring connecting the external power source and the vibration measuring device 3 are not necessary. The vibration can be measured simply by installing the vibration measuring device 3 on the measuring object M.

  Furthermore, since the vibration measuring apparatus 3 can wirelessly communicate with the outside, there is no need for wiring for communication, and vibration data in a remote place can be easily analyzed.

[Fourth Embodiment]
In the above-described three embodiments, the configuration in which the vibration measuring apparatus includes one piezo film has been described. Hereinafter, a configuration in which the vibration measuring apparatus includes two piezo films will be described.

  FIG. 8 is a diagram showing the structure of the vibration measuring device 4 according to the fourth embodiment. Referring to FIG. 8, the vibration measuring device 4 includes a fixture 45, piezo films 41A and 41B, movable magnets 42A and 42B, compression coil springs 43A and 43B, and output cables 46A and 46B. Since other configurations are the same as those of the first embodiment, description thereof will not be repeated.

  The fixture 45 is fixed inside the housing 17. One end of the piezo film 41 </ b> A is fixed to a fixture 45. A movable magnet 42A is fixed to the other end of the piezo film 41A on the surface facing the bottom surface portion of the housing 17. One end portion of the compression coil spring 43A is fixed to the housing lid 18, and the other end portion is fixed to the piezo film 41A. One end portion of the output cable 46A is connected to the piezo film 41A, and the other end portion is connected to the electric circuit board 14.

  One end of the piezo film 41B is fixed to a fixture 45. At the other end of the piezo film 41B, a movable magnet 42B is fixed to the surface facing the piezo film 41A. The movable magnet 42B faces the same magnetic pole as the movable magnet 42A. In FIG. 8, the movable magnet 42A and the movable magnet 42B face the south pole, but may face the north pole. One end portion of the compression coil spring 43B is fixed to the bottom surface portion of the housing 17, and the other end portion is fixed to the piezo film 41B. One end of the output cable 46B is connected to the piezo film 41B, and the other end is connected to the electric circuit board 14.

  It is desirable that the repulsive force received by the movable magnet 42A from the movable magnet 42B and the restoring force of the compression coil spring 43A are balanced in the stationary state of the measurement object M. Similarly, it is desirable that the repulsive force that the movable magnet 42B receives from the movable magnet 42A and the restoring force of the compression coil spring 43B are balanced in a stationary state of the measurement object M. For these balances, the air gap and magnetic force between the movable magnet 42A and the movable magnet 42B and the spring constants of the compression coil springs 43A and 43B may be adjusted. This is because the force is balanced at the neutral position, so that when it receives external vibration in the repulsion direction, it tends to be displaced in either direction.

  Also in the fourth embodiment, when the measurement object M vibrates, the movable magnets 42A and 42B also vibrate accordingly. Thus, the piezo film 41A supplies an alternating current to the electric circuit board 14 through the output cable 46A, and the piezo film 41B supplies an alternating current to the electric circuit board 14 through the output cable 46B.

  In the fourth embodiment, the first movable portion includes the movable magnet 42A, the second movable portion includes the movable magnet 42B, and the fixed portion includes the fixture 45, the housing 17, and the housing lid 18. Including.

  Also in the fourth embodiment, since the vibration measuring device 4 can use the power generated by the piezo films 41A and 41B, the external power source and the wiring connecting the external power source and the vibration measuring device 4 are provided. It becomes unnecessary, and the vibration can be measured only by installing the vibration measuring device 4 on the measuring object M.

  Furthermore, since the vibration measuring device 4 can wirelessly communicate with the outside, there is no need for wiring for communication, and vibration data in a remote place can be easily analyzed.

[Fifth Embodiment]
In the above-described embodiment, the vibration measuring apparatus has been described. In the fifth embodiment, a vibration measurement system using such a vibration measurement device will be described.

  FIG. 9 schematically shows a configuration of vibration measurement system 100 according to the fifth embodiment. With reference to FIG. 9, the vibration measurement system 100 includes a vibration measurement device 5, a data collection device 60, a data management device 70, a data analysis device 80, and a browsing terminal 90. Since the vibration measuring device 5 may follow any of the above-described embodiments, the description of the vibration measuring device 5 will not be repeated.

  The vibration measurement device 5 transmits vibration data and ID to the data collection device 60 using a communication method compliant with ZigBee (hereinafter, the vibration data and ID to be transmitted are collectively referred to as “transmission data”). . At this time, it is desirable that the transmission data also includes information (model, model number, etc.) for identifying the measurement date and measurement object, and information such as the position where the vibration measuring device 5 is installed. Communication between the vibration measuring device 5 and the data collecting device 60 may be via a repeater (not shown).

  The data collection device 60 collects transmission data from the vibration measurement device 5. Then, the collected transmission data is transmitted to the data management device 70 via a telephone line.

  The data management device 70 associates and stores the vibration data included in the vibration data from the data collection device 60 and the ID. Furthermore, the data management device 70 classifies and manages vibration data based on the received ID.

  The data analysis device 80 accesses the data management device 70 using a communication method compliant with LAN, WiFi, or Bluetooth, and acquires vibration data. The data analysis device 80 analyzes the frequency based on the acquired vibration data and displays the result. The data analysis device 80 stores the analysis result and transmits the analysis result and the ID to the data management device 70. The data management device 70 stores the analysis result and the ID as a backup. In the data management device 70, the analysis result and the ID are associated and managed. When the vibration value (amplitude, speed, or acceleration) is equal to or greater than a predetermined threshold as a result of the analysis, the data analysis device 80 transmits a warning that abnormal vibration has occurred to a predetermined transmission destination. . The threshold value may be set stepwise from a value corresponding to mild abnormal vibration to a value corresponding to severe abnormal vibration.

  The browsing terminal 90 accesses the data analysis device 80 using a communication method compliant with LAN, WiFi, and Bluetooth. The browsing terminal 90 can acquire the ID and the result of the analysis and browse the result of the analysis for each ID. As the browsing terminal 90, a personal computer, a mobile phone, a smartphone, or a PDA can be considered.

  In the vibration measurement system 100, since the vibration measurement device 5 can wirelessly communicate with the outside, there is no need for wiring for communication, and vibration data in a remote place can be easily analyzed.

  Furthermore, in the vibration measurement system 100, the vibration measurement device 5 transmits vibration data and ID to the data collection device 60. The data collection device 60 transmits the received vibration data and ID to the data management device 70. Therefore, the data management device 70 can know which vibration measurement device 5 has received the vibration data. Therefore, the vibration measurement system 100 facilitates collective management of vibration data measured by the plurality of vibration measurement devices 5.

  The vibration measuring apparatus according to the present invention is not limited to the configuration described in the first to fourth embodiments, and may include, for example, three or more piezoelectric films. The sensor is not limited to an acceleration sensor, and any sensor may be used as long as vibration can be measured, such as a speed sensor or a non-contact displacement sensor.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1,1A, 2,2A, 3,4,5 Vibration measuring device, 10, 45 Fixing tool, 11, 41A, 41B Piezo film, 12, 42A, 42B Movable magnet, 13 Fixed magnet, 13A tag, 14, 14A Electricity Circuit board, 15 coaxial cable, 16, 46A, 46B output cable, 17 housing, 18 housing lid, 19, 132, 402 antenna, 22, 22A weight, 23 tension coil spring, 23A, 34 compression coil spring, 43A, 43B coil Spring, 40 Reader / writer, 60 Data collection device, 70 Data management device, 80 Data analysis device, 90 Viewing terminal, 100 Vibration measurement system, 131 Chip, 141 Full wave rectifier circuit, 142 Smoothing circuit, 143, 144 Booster circuit, 145 Microcomputer, 146 Power storage circuit, 1 7 acceleration sensors, 148 communication circuit.

Claims (15)

A vibration measuring device that is fixed to a measurement object and measures the vibration of the measurement object,
While the vibration measuring device is fixed to the measurement object, a fixed portion that does not relatively displace relative to the measurement object;
A first movable part capable of relative displacement with respect to the fixed part;
A first part fixed to the fixed part and a second part different from the first part fixed to the first movable part are included, and the second part vibrates to generate power. A first piezo element;
A vibration measurement apparatus comprising: a sensor that detects vibration of the measurement object using electric power generated by the first piezoelectric element.   The vibration measuring apparatus according to claim 1, wherein a vibration direction of the measurement object and a vibration direction of the second part are the same. The first movable part includes a first magnet,
The fixing portion includes a second magnet,
The vibration measuring apparatus according to claim 1, wherein the first magnet and the second magnet are opposed to each other along a vibration direction of a second portion of the first piezo element.   The vibration measuring apparatus according to claim 1, wherein the first movable part includes a weight. The vibration measuring apparatus further includes an elastic member including one end fixed to the fixed portion and the other end fixed to the first movable portion or the second portion of the first piezoelectric element,
The vibration measuring apparatus according to claim 3, wherein the elastic member expands and contracts along a vibration direction of a second portion of the first piezo element.   The vibration measuring apparatus according to claim 5, wherein the elastic member is a tension coil spring or a compression coil spring. The vibration measuring device includes:
A second movable part capable of relative displacement with respect to the fixed part;
A first part fixed to the fixed part and a second part different from the first part fixed to the second movable part are included, and the second part vibrates to generate power. A second piezo element;
The vibration measuring apparatus according to claim 1, wherein the sensor detects vibration of the measurement object using electric power generated by the first piezo element and electric power generated by the second piezo element. The vibration measuring device includes:
A first elastic member including one end fixed to the fixed portion and the other end fixed to the first movable portion or the second portion of the first piezoelectric element;
A second elastic member including one end fixed to the fixed portion and the other end fixed to the second movable portion or the second portion of the second piezoelectric element;
The first movable part includes a first magnet,
The second movable part includes a second magnet,
The vibration measuring apparatus according to claim 7, wherein the first magnet and the second magnet are opposed to each other along a vibration direction of a second portion of the first piezo element. The fixed part includes a housing,
The first piezo element and the sensor are fixed inside the housing,
The vibration measuring apparatus according to claim 1, wherein the first movable part is displaced inside the housing.   The vibration measuring apparatus according to claim 1, wherein the sensor is an acceleration sensor.   The vibration measuring device according to claim 1, further comprising a communication unit that wirelessly communicates a detection value of the sensor using electric power generated by the vibration measuring device. A vibration measuring device according to claim 11;
A data collection device for receiving data relating to vibration of the measurement object from the vibration measurement device;
A data management device for receiving the data from the data collection device;
A vibration measurement system comprising: a data analysis device that receives the data from the data management device.   The data analysis device determines whether or not abnormal vibration has occurred based on the analysis result of the data, displays the determination result, and stores the analysis result and the determination result. The vibration measurement system according to claim 12, wherein the analysis result is transmitted to the data management device. The vibration measurement system further includes a viewing terminal that receives the analysis result and the determination result from the data analysis device,
The vibration measurement system according to claim 13, wherein the browsing terminal displays the received analysis result and the determination result.   The vibration measurement system according to any one of claims 12 to 14, wherein the data related to the vibration includes an identifier for identifying the vibration measurement device that has measured the vibration.

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