WO2013153845A1 - 振動エネルギー検出装置、振動エネルギー検出システム - Google Patents
振動エネルギー検出装置、振動エネルギー検出システム Download PDFInfo
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- WO2013153845A1 WO2013153845A1 PCT/JP2013/053155 JP2013053155W WO2013153845A1 WO 2013153845 A1 WO2013153845 A1 WO 2013153845A1 JP 2013053155 W JP2013053155 W JP 2013053155W WO 2013153845 A1 WO2013153845 A1 WO 2013153845A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0008—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of bridges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0066—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by exciting or detecting vibration or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
Definitions
- the present invention relates to an apparatus and a system for detecting vibration energy generated in an inspection object.
- Patent Document 2 discloses a technology related to a vibration power generation device provided in a wristwatch. In this technology, the power consumption mode in a wristwatch is switched depending on whether or not the vibration power generation device is generating power by vibration. Is called.
- the vibration power generation device functions as a vibration sensor that directly installs the vibration displacement generated in the inspection object into an electric signal by being installed on the inspection object.
- the detection of vibration displacement it is possible to obtain the acceleration obtained by the acceleration sensor by electrical processing (integration twice).
- the vibration power generator is used for the reason that the electrical processing has electric power or the like. Vibration detection is still a useful technique.
- Patent Document 3 discloses a technique for generating vibration information and acceleration information by counting the number of vibrations of an alternating voltage generated from a vibration power generator with a counter circuit.
- vibration power generation device When using a vibration power generation device as a vibration sensor, grasp the vibration energy generated in the inspection object in which the vibration power generation device is installed by associating the energy of the generated power generated by the vibration power generation device with the vibration energy. Can do. Therefore, in the prior art, power generated by the vibration power generator is stored in a power storage device such as a capacitor, and vibration energy is calculated from the stored energy. However, since an electricity storage device generally has a leakage current characteristic as an inevitable physical characteristic, the energy stored in the electricity storage device tends to decrease with the leakage current from the device. Therefore, it is difficult to accurately grasp the vibration energy based on the stored energy itself of the storage device as in the prior art.
- the frequency of vibration generated in the inspection object may be extremely low.
- the ratio of the amount of discharge due to the leakage current of the electricity storage device to the amount of charge to the electricity storage device by the vibration power generation device as the vibration sensor becomes high, the above is further based on the energy stored in the electricity storage device. It is difficult to accurately grasp the vibration energy.
- the present invention has been made in view of the above problems, and provides a vibration energy detection device or system capable of accurately detecting vibration energy generated in an inspection object using a vibration power generation device. Objective.
- vibration energy generated in the inspection object is calculated based on the number of formations (formation frequency) of the storage state of the power storage unit formed by discharging the power storage energy of the power storage unit.
- the configuration to calculate was adopted. In this way, by linking the number of formations of the storage state due to the discharge of the storage energy of the storage unit to the vibration energy, it is possible to reduce the influence of the leakage current that can occur at all times and calculate the vibration energy more appropriately. It becomes.
- the present invention is a vibration energy detection device that detects vibration energy generated in an inspection object, and is a vibration that is installed in the inspection object and converts the vibration energy generated in the inspection object into electric power.
- a power generation unit a power storage unit that stores the generated power from the vibration power generation device, a voltage monitoring unit that monitors a storage voltage of the power storage unit, and when a storage voltage of the power storage unit exceeds a predetermined storage voltage,
- a vibration generated in the test object based on the number of times the storage state of the power storage unit formed by a discharge control unit that discharges energy stored by the power storage unit and the power storage unit formed continuously or intermittently by the discharge of the discharge control unit
- a vibration energy calculation unit for calculating energy.
- the power generated by the vibration power generation device is stored in the power storage unit.
- the energy amount stored there is called electrical storage capacity, and it distinguishes from the electrostatic capacitance.
- the power storage unit include an aluminum electrolytic capacitor, an electric double layer capacitor, and a lithium ion capacitor.
- the voltage monitoring unit monitors the storage voltage of the power storage unit, and when the storage voltage exceeds the predetermined storage voltage, in other words, exceeds the predetermined storage voltage set reflecting the storage capacity of the power storage unit.
- the discharge controller discharges the stored energy by the power storage unit. As a result, the power storage unit can newly be charged with the power generated by the vibration power generator.
- the power storage unit has a considerable amount of leakage current characteristics in which the stored energy inside it leaks to the outside. Therefore, when the vibration energy is calculated by storing the electric power generated by the vibration power generator in the power storage unit, it is desirable to eliminate as much as possible the influence of the leakage current characteristic in the power storage unit. Therefore, in the vibration energy detection device according to the present invention, the vibration energy calculation unit is configured to repeatedly or repeatedly form the storage state of the power storage unit that is continuously or intermittently formed by the discharge of the discharge control unit. Based on the number of times (or frequency) of a predetermined state (power storage state) formed in the power storage unit by the discharge of, vibration energy generated in the inspection object is calculated.
- discharging of the discharge control unit is performed when the storage voltage of the power storage unit exceeds a predetermined storage voltage, and thus the amount of energy stored in the power storage unit at that time can be grasped.
- the number of formations in the calculation of vibration energy essentially divides the time for which the energy storage unit continues to store the storage energy, and therefore the leakage current characteristics of the storage unit in one formation cycle. The influence can be suppressed as much as possible. Therefore, in calculating the vibration energy, according to the present invention, the storage energy in which the influence of the leakage current is suppressed as much as possible (that is, the energy released by one discharge) and the number of formations are taken into consideration.
- the vibration energy detection device can appropriately calculate vibration energy generated in the inspection object.
- the leakage current characteristic of the power storage unit is a predetermined leakage current characteristic set based on the frequency of power generation by the vibration power generator and the amount of generated power.
- the power storage unit has a characteristic that the amount of leakage current increases as the capacitance increases.
- the stored energy stored in the power storage unit is discharged by the discharge control unit.
- the power storage capacity of the power storage unit is small, this discharge frequency increases and the power consumption required for the discharge control increases. Resulting in. Therefore, it is preferable to set a storage capacity of the power storage unit that can appropriately suppress the amount of leakage current and avoid excessive discharge frequency, and the leakage current characteristic according to the capacity becomes the predetermined leakage current characteristic.
- the vibration energy calculation unit may calculate vibration energy generated in the inspection object based on the number of times the discharge state formed by the discharge of the discharge control unit is formed.
- the number of times the discharge state is formed is the number of times that a state in which energy is released in the power storage unit due to the discharge of the discharge control unit is formed, in other words, the number of discharges of the discharge control unit.
- the vibration energy calculation unit is charged when vibration energy is charged after the discharge control unit is discharged, and a state of charge formed when the stored voltage of the power storage unit reaches the predetermined stored voltage
- the vibration energy generated in the inspection object may be calculated on the basis of the number of times of formation. Since the state of charge is formed continuously or intermittently by the discharge of the discharge controller, the number of times of formation of the state of charge is the number of times of storage state formed due to the discharge of the discharge controller. It has a certain correlation with the number of discharges of the discharge control unit. Therefore, by calculating the vibration energy according to the number of times the charge state is formed in this way, the influence of the leakage current characteristic of the power storage unit can be eliminated as much as possible, and the calculation accuracy can be improved.
- a plurality of the power storage units are provided, and each of the plurality of power storage units is parallel to the vibration power generation device so that the generated power of the vibration power generation device can be stored. And when one of the plurality of power storage units is discharged by the discharge control unit, the generated power of the vibration power generator excludes the one power storage unit among the plurality of power storage units You may be comprised so that it may be supplied to another electrical storage part. By connecting a plurality of power storage units to the vibration power generation device in this manner, even when the discharge control unit is discharging, the generated power of the vibration power generation device is other than the power storage unit where the discharge is performed.
- the present invention is a sensor module that is installed in an inspection object and acquires information related to vibration applied to the inspection object, and vibrations generated in the inspection object based on the information acquired by the sensor module. And a server that calculates energy, and can be grasped from the aspect of a vibration energy detection system that detects vibration energy generated in an inspection object.
- the sensor module is installed in an inspection object, and a vibration power generation apparatus that converts the vibration energy generated in the inspection object into power, and the generated power from the vibration power generation apparatus
- a power storage unit that stores the voltage
- a voltage monitoring unit that monitors a storage voltage of the power storage unit
- a discharge control unit that discharges energy stored by the power storage unit when the storage voltage of the power storage unit exceeds a predetermined storage voltage
- a detection unit for detecting the number of formations of the storage state of the power storage unit formed continuously or intermittently by the discharge of the discharge control unit, and data regarding the number of formations of the storage state detected by the detection unit,
- a transmission unit for transmitting to the server.
- the server receives the data related to the number of formations of the storage state transmitted from the transmission unit, and the inspection target based on the data about the number of formations of the storage state received by the reception unit
- a vibration energy calculation unit that calculates vibration energy generated in the object.
- the vibration energy detection system information regarding the vibration of the inspection object is acquired by the sensor module, and the information is passed to the server.
- the exchange of information between the sensor module and the server may be performed via a wire or may be performed via a wireless communication between the transmission unit of the sensor module and the reception unit of the server.
- the technical idea regarding the vibration power generation device, the power storage unit, the voltage monitoring unit, and the discharge control unit of the vibration energy detection system according to the present invention is substantially the same as the technical idea related to each configuration related to the vibration energy detection device described above. Because there is, detailed explanation of those is omitted.
- the technical concept related to the sensor module-side detection unit and the server-side vibration energy calculation unit is included in the above-described technical concept related to the vibration energy calculation unit of the vibration energy detection device, and thus detailed description thereof is omitted. To do.
- the vibration energy calculation unit may calculate the vibration energy generated in the inspection object based on the number of times the discharge state is formed by the discharge of the discharge control unit.
- the vibration energy calculating unit is charged with vibration energy after the discharge of the discharge control unit, and based on the number of times of formation of the charging state formed when the stored voltage of the power storage unit reaches the predetermined stored voltage. The vibration energy generated in the inspection object may be calculated.
- the sensor module may include a plurality of the power storage units.
- each of the plurality of power storage units is connected in parallel to the vibration power generation device so that the power generated by the vibration power generation device can be stored, and one power storage unit among the plurality of power storage units.
- the generated power of the vibration power generator may be supplied to other power storage units other than the one power storage unit among the plurality of power storage units.
- the vibration energy detection system it is possible to appropriately calculate the vibration energy generated in the inspection object.
- a plurality of sensor modules may be installed on the same inspection object, and information regarding vibrations from them may be collected in a server.
- FIG. 2 is a diagram showing the correlation between the capacitance of the capacitor and the leakage current, and the correlation between the capacitance and the total amount of energy consumed for discharging the capacitor with respect to the capacitor included in the vibration sensor module shown in FIG. .
- 3 is a flowchart of a vibration energy detection process executed in the vibration sensor module shown in FIG. 2 is a control map that correlates the correlation between the number of discharge times and vibration energy, which is used for calculation of vibration energy executed by the server shown in FIG.
- the vibration energy detection system shown in FIG. 1 is a system that uses the vibration sensor module 1 to detect vibration energy applied to the bridge 50 in which the module is installed.
- the vibration sensor module 1 since the performance of the bridge 50 deteriorates with the passage of time of use, it is necessary to grasp the change in the performance of the bridge 50 in a timely manner.
- the amplitude (vibration displacement) and vibration frequency related to the vibration of the bridge 50 change according to the progress of deterioration of the bridge 50 caused by earthquakes and repeated traffic of large vehicles. It is desirable to perform maintenance of the bridge 50 effectively. Therefore, in the vibration energy detection system shown in FIG. 1, a plurality of vibration sensor modules that can directly detect displacement caused by vibration are installed on the bridge 50.
- vibration information Information relating to the vibration of the bridge 50 detected by the plurality of vibration sensor modules 1 (hereinafter also referred to as “vibration information”) is transmitted to the base station 7.
- the base station 7 is connected to the Internet 60, and the received information regarding the vibration of the bridge 50 is delivered to the server 10 via the Internet 60.
- the server 10 uses the vibration information obtained from the vibration sensor module 1 to accurately grasp the state of vibration applied to the bridge 50, and performs processing such as strength determination of the bridge 50 (for example, the degree of strength reduction). Judgment).
- the server 10 also includes other information necessary for the determination (such as the weather data of the area where the bridge 50 exists, the traffic load data of the bridge 50, etc.) connected to the Internet 60, such as the data servers 70 and 80. It is comprised so that it can obtain from.
- FIG. 2 shows functional blocks representing the functions exhibited by the vibration sensor module 1 and the server 10 in an image.
- the vibration sensor module 1 is provided with a vibration power generator 4 capable of outputting, as an electrical signal, vibration applied to the bridge 50, that is, displacement of vibration transmitted to the vibration sensor module 1 via the bridge 50.
- the vibration power generation device 4 functions as a power source using so-called environmental energy, and a power generation device using electret material is an example. Since the vibration power generator itself is a known technique, its detailed description in this specification is omitted. Then, the power generated by the vibration power generator 4 is stored in a capacitor 6 serving as a power storage device through a rectifying / transforming circuit 5.
- a plurality of capacitors 6 are installed, and each capacitor 6 is connected in parallel to the vibration power generator 4 so that the power generated by the vibration power generator 4 can be charged. .
- the energy stored in the capacitor is treated as related to the vibration energy generated in the bridge 50, in other words, used as a parameter for detecting the vibration energy. . Accordingly, the energy stored in the capacitor 6 is not directly used as energy for driving each component of the vibration sensor module 1, but after the vibration energy detection processing described later is performed, the vibration sensor module. 1 drive energy may be used.
- a power generation device other than the vibration power generation device for example, a solar power generation device, a thermal power generation device, an electromagnetic induction power generation (CT power generation) device, a bioelectric power generation device, or the like is mounted on the vibration sensor module 1, and the power generated by these devices is generated. It may be used as a power source. Since these devices are also well-known techniques, their detailed description in this specification is omitted. Further, since the rectification / transformation circuit is a known technique, a detailed description thereof will be omitted.
- the vibration sensor module 1 configured as described above uses the power generation operation by the vibration power generation device 4 for detection of vibration energy applied to the bridge 50.
- the vibration power generation apparatus In the configuration shown in FIG. 2, only the vibration power generation apparatus is described as a sensor that detects environmental parameters related to vibration. However, in addition to the device, an acceleration sensor that detects acceleration applied to the bridge 50 is used as the vibration sensor module 1. May be included.
- vibration energy detection processing using the stored energy of the capacitor 6 is performed by the control device 2.
- the detection process is executed by the charge control unit 21, the discharge control unit 22, the voltage monitoring unit 23, the discharge number detection unit 24, and the transmission unit 25 formed in the control device 2.
- the functions exhibited by these functional units may be realized by a control circuit corresponding to each function provided in the control device 2, and when the control device 2 is a computer, the function is executed on the computer.
- the control program may be realized, or may be realized by the cooperation of the control circuit and the control program.
- the control device 2 may have a functional unit other than the functional units shown in FIG.
- the charging control unit 21 is a functional unit that controls the charging of the capacitor 6. As described above, in the vibration sensor module 1, the plurality of capacitors 6 are connected in parallel to the vibration power generator 4. Therefore, the charging control unit 21 performs control related to charging of the generated power, such as which capacitor 6 is charged with the generated power of the vibration power generator. On the other hand, the discharge control unit 22 performs control related to the discharge of the electric power stored in the capacitor 6 in order to detect vibration energy applied to the bridge 50.
- the voltage monitoring unit 23 is a functional unit that monitors the stored voltage of the capacitor 6 in order to perform charge control by the charge control unit 21 and discharge control by the discharge control unit 22 at appropriate timing. The discharge of the capacitor 6 by the discharge control unit 22 is performed when the accumulated voltage of the capacitor 6 monitored by the voltage monitoring unit 23 reaches a predetermined accumulated voltage (discharge threshold).
- the discharge number detection unit 24 is a functional unit that detects, that is, counts, the number of discharges of the capacitor 6 performed by the discharge control unit 22.
- the capacitors 6 to be counted by the discharge number detection unit 24 are capacitors in which the vibration energy of the bridge 50 is stored as power generation energy, that is, all the capacitors 6 included in the vibration sensor module 1.
- the transmission unit 25 transmits information related to vibration acquired by the vibration sensor module 1 including the number of discharges detected by the discharge number detection unit 24 to the server 10 via the base station 7 by wireless communication. It is a functional part.
- the communication method of the wireless communication is not limited to a specific method, but as an example, it is preferable to adopt a communication method with low power consumption conforming to the standard ZigBee (registered trademark).
- these functional units are distinguished as shown in FIG. 1, but in a specific embodiment, as long as the above-described functions themselves are exhibited, the functional units are integrated or functions. The parts may be subdivided.
- any capacitor for example, an electric double layer capacitor
- the capacitor 6 has leakage current characteristics. As shown by the solid line L1 in FIG. 3, the amount of leakage current tends to increase as the capacitance of the capacitor increases. The increase in the leakage current means that the maintenance of the storage of the generated power of the vibration power generation device 4 is impeded. Therefore, as the leakage current of the capacitor increases, the accurate vibration energy can be grasped based on the storage energy. Becomes more difficult.
- the capacitance of the capacitor 6 is preferably as small as possible.
- a discharge state a state in which the storage energy is minimized by the discharge
- the leakage current is determined based on the capacitance of the capacitor 6 based on the assumed vibration frequency of the bridge 50, that is, the power generation frequency by the vibration power generation device 4 and the power generation capability of the vibration power generation device 4.
- the capacitance is set such that the storage capacity for ensuring that the number of discharges by the discharge control unit 22 is not excessively large can be ensured while being as small as possible.
- a capacitor having a capacitance corresponding to the intersection of the line L1 and the line L2 shown in FIG. 3 may be selected as the capacitor 6, and when the necessity for concern about the power consumption in the vibration sensor module 1 is low. In this case, a capacitor having a smaller capacitance may be selected as the capacitor 6.
- the vibration energy of the bridge 50 is calculated based on the information related to vibration transmitted from the vibration sensor module 1.
- the calculation process is executed by the reception unit 11 and the calculation unit 12 formed in the server 10.
- the reception unit 11 is a functional unit that receives information transmitted by the transmission unit 25 of the vibration sensor module 1. Therefore, the communication method in the reception unit 11 is the same as the communication method in the transmission unit 25.
- the calculation unit 12 is a functional unit that calculates vibration energy generated in the bridge 50 based on information received by the reception unit 11.
- FIG. 4 A vibration energy detection process and a vibration energy calculation process executed by the vibration sensor module 1 and the server 10 configured as described above will be described with reference to FIGS.
- the vibration energy detection process shown in FIG. 4 is a process performed in one vibration sensor module. Therefore, in each vibration sensor module 1, the vibration energy detection process is performed at each timing.
- FIG. 5 is a control map that correlates the correlation between the number of discharges and vibration energy, which is used for calculation of vibration energy executed by the server 10.
- S101 it is determined whether or not the accumulated voltage of the capacitor 6 monitored by the voltage monitoring unit 23 is larger than the discharge threshold value.
- the capacitor 6 that is the object of this determination process is the capacitor 6 that is charged with the power generated by the vibration power generation device 4 among the plurality of capacitors 6 included in the vibration sensor module 1. If YES is determined in S101, the process proceeds to S102, and if NO is determined, the process proceeds to S105.
- S102 to S104 processing relating to the discharge of the capacitor 6 for which it is determined that the stored voltage has exceeded the discharge threshold is performed.
- the parameter “number of discharges” is determined when the capacitor 6 is discharged by the discharge control unit 22 starting from a predetermined timing, such as when the vibration sensor module 1 is turned on, and the storage state is the discharge state, that is, the charge is stored. This is a cumulative count of the number of times that a state in which the stored energy is released to the outside and the stored energy becomes minimal is formed.
- the parameter “number of discharges” is used to detect vibration energy generated in the bridge 50. Therefore, in S106, it is determined whether or not it is time to transmit the parameter “discharge count” data, which is information related to the vibration, to the server 10. Since a relatively large amount of energy is required for data transmission from the vibration sensor module 1, it is possible to reduce power consumption by limiting the data transmission timing and transmitting the data in a state of being collected to some extent. Figured.
- the data to be transmitted preferably includes the time when the number of discharges is incremented in addition to the numerical value of the number of discharges.
- the electric power generated by the vibration power generation device 4 according to the vibration generated in the bridge 50 is once stored in the capacitor 6, and then the discharge process is performed. Is done. Then, the number of discharges, which is the number of times of the discharge process, is incremented every time the process is performed, and the number of discharges is transmitted to the server 10 side in a timely manner. Data regarding the number of discharges received from the vibration sensor module 1 is processed by the server 10 and the vibration energy generated in the bridge 50 is calculated.
- the vibration energy calculation process on the server 10 side will be described.
- the calculation process is executed by the calculation unit 12.
- the server 10 receives data related to the number of discharges from the vibration sensor module 1 by the receiving unit 11.
- the parameter “number of discharges” is the number of discharge processes performed by the discharge control unit 22 when the stored voltage of the capacitor 6 exceeds the discharge threshold, and the discharge of the capacitor 6 formed by the discharge process. The number of times the state is formed.
- the method of calculating the vibration energy based on the “number of discharges” is a calculation method in which the influence of the leakage current characteristic in the capacitor 6 is eliminated as much as possible.
- the energy discharged by the discharge process corresponds to the stored energy when the stored voltage of the capacitor 6 reaches the discharge threshold. Therefore, it is considered that the vibration energy generated in the bridge 50 is in principle proportional to the total discharge energy obtained by multiplying the discharge energy in the capacitor 6 by the number of discharges. Therefore, in the control map shown in FIG. 5, the correlation between the number of discharges and the vibration energy is defined so that the vibration energy increases in proportion to the number of discharges. Then, the calculation unit 12 can calculate the vibration energy generated in the bridge 50 by accessing the control map shown in FIG. 5 based on the received “number of discharges”.
- the correlation between the vibration energy and the number of discharges is specified so that the vibration energy is proportional to the number of discharges, but the installation position of the vibration sensor module 1 on the bridge 50 and the detection of other vibration sensor modules 1 Based on the results and the like, the control map does not necessarily have the proportional relationship. Based on various experiments in advance, an appropriate correlation between the number of discharges and vibration energy may be set.
- the number of times of formation of the discharge state which is the storage state of the capacitor 6, formed by the discharge process of the discharge control unit 22 is counted as the number of discharges, and is transmitted to the server 10 side.
- the vibration energy generated in the bridge 50 can be calculated by eliminating the leakage current characteristic of the capacitor 6. Instead of the calculation form using the number of discharges in this way, even if the vibration energy is calculated based on the number of formations of the charged state formed by the accumulated voltage of the capacitor 6 reaching the discharge threshold value, the same Thus, it is possible to calculate vibration energy excluding the leakage current characteristic of the capacitor 6.
- the discharge of the capacitor 6 is repeated by the discharge control unit 22, and thus the above-described charging state is also the storage state of the capacitor 6 formed through the discharge of the discharge control unit 22. Therefore, by using the number of times of formation of the charged state, which is the number of times of formation of the storage state, it is possible to accurately calculate vibration energy as in the case of using the number of discharges.
- the server 10 can grasp the discharge frequency by including data related to the time when the number of discharges is incremented in the data transmitted from the vibration sensor module 1 to the server 10. For example, a shorter time interval at which the number of discharges is incremented means that the discharge frequency has increased. If the fact that the discharge frequency is high at the location of the bridge 50 where the vibration sensor module 1 is installed has a certain technical meaning, for example, when the discharge frequency exceeds a predetermined frequency, the strength of the bridge 50 is increased. An alarm may be issued to a user who manages the bridge 50 in accordance with a reason that it can be technically determined that it is lowered.
- a configuration in which a plurality of capacitors 6 are installed in the vibration sensor module 1 is disclosed, but instead, one capacitor 6 may be included in the vibration sensor module 1.
- the vibration sensor module 1 the power generated by the vibration power generation device 4 is stored by the single capacitor 6, so the process of S ⁇ b> 104 in the vibration energy detection process shown in FIG. 4, that is, the process of switching the charging capacitor. Is not done.
- the vibration sensor module 1 including one capacitor inside and the vibration sensor module 1 including a plurality of capacitors inside may be mixed.
- the vibration sensor module 1 is provided on the bridge 50 side, and vibration energy is collected by the server 10 installed at a position away from the vibration sensor module 1 to detect vibration energy.
- a vibration energy detection system to perform is disclosed.
- the vibration sensor module 1 and the server 10 are individually formed, and the vibration energy detection system is formed by connecting the two by wireless communication.
- the form in which the calculation process of the vibration energy based on the power generation by the vibration power generation apparatus 4, the power storage by the capacitor 6, the discharge, and the number of discharges is performed in one apparatus, that is, the present invention is a vibration energy detection It can also be understood as a device. In such a case, the vibration energy data calculated for each vibration energy detection device itself may be collected in the server 10 via the base station 7.
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Abstract
Description
上記実施例では、放電制御部22の放電処理によって形成される、コンデンサ6の蓄電状態である放電状態の形成回数を、放電回数としてカウントし、それをサーバ10側に送信することで、サーバ10が橋梁50で生じた振動エネルギーを、コンデンサ6の漏れ電流特性を排除して算出することが可能となる。このように放電回数を利用する算出形態に代えて、コンデンサ6の蓄電圧が放電用閾値まで到達することで形成される充電状態の形成回数に基づいて振動エネルギーを算出しても、同じように、コンデンサ6の漏れ電流特性を排除した振動エネルギーの算出が可能となる。振動センサモジュール1では、放電制御部22によってコンデンサ6の放電が繰り返されることになっており、そのため上記充電状態も、放電制御部22の放電を経て形成されるコンデンサ6の蓄電状態である。したがって、その蓄電状態の形成回数である、充電状態の形成回数を利用することで、放電回数を利用する場合と同じように正確な振動エネルギーの算出が実現される。
また、上述したように、振動センサモジュール1からサーバ10へ送信されるデータに、放電回数をインクリメント処理した時期に関するデータを含めることで、サーバ10が放電頻度を把握することが可能である。例えば、放電回数がインクリメントされる時間間隔が短くなることは、放電頻度が高くなったことを意味する。当該振動センサモジュール1が設置された橋梁50の場所において放電頻度が高くなったことが、技術的に一定の意味を有する場合、例えば、放電頻度が所定の頻度以上になると、橋梁50の強度が低下していると技術的に判断できる等の理由に従い、橋梁50の管理を行うユーザにアラームを発令してもよい。
上記実施例では、振動センサモジュール1に複数個のコンデンサ6が設置された形態が開示されているが、それに代えて、振動センサモジュール1に1個のコンデンサ6が含まれるようにしてもよい。この場合、振動センサモジュール1において、振動発電装置4による発電電力は1個のコンデンサ6によって蓄電されることになるため、図4に示す振動エネルギー検出処理におけるS104の処理、すなわち充電コンデンサを切り替える処理は行われない。また、図1に示す振動エネルギー検出システムでは、内部に1個のコンデンサを含む振動センサモジュール1と、内部に複数個のコンデンサを含む振動センサモジュール1とが混在しても構わない。
図1、図2に示す実施例には、橋梁50側に振動センサモジュール1が設けられ、そこから離れた位置に設置されたサーバ10に振動に関するデータが収集されることで振動エネルギーの検出を行う振動エネルギー検出システムが開示されている。当該実施例では、振動センサモジュール1とサーバ10が個別に形成され、両者を無線通信で繋ぐことで振動エネルギー検出システムが形成されている。この形態に代えて、一つの装置の中で、振動発電装置4による発電、コンデンサ6による蓄電、放電、放電回数に基づいた振動エネルギーの算出処理を行う形態、すなわち、本発明を、振動エネルギー検出装置として捉えることもできる。このような場合は、振動エネルギー検出装置ごとに算出された振動エネルギーのデータそのものを、基地局7を介してサーバ10に集約するように構成してもよい。
2・・・・制御装置
4・・・・振動発電装置
6・・・・コンデンサ
10・・・・サーバ
12・・・・算出部
21・・・・充電制御部
22・・・・放電制御部
23・・・・電圧監視部
24・・・・放電回数検出部
50・・・・橋梁
Claims (10)
- 検査対象物に設置され、該検査対象物に生じた振動エネルギーを電力変換する振動発電装置と、
前記振動発電装置からの発電電力を蓄電する蓄電部と、
前記蓄電部の蓄電圧を監視する電圧監視部と、
前記蓄電部の蓄電圧が所定蓄電圧を超えたときに、該蓄電部による蓄電エネルギーを放電する放電制御部と、
前記放電制御部の放電によって連続的又は断続的に形成される前記蓄電部の蓄電状態の形成回数に基づいて、該検査対象物に生じた振動エネルギーを算出する振動エネルギー算出部と、
を備える、振動エネルギー検出装置。 - 前記蓄電部は、前記振動発電装置による発電の頻度と該発電による電力量とに基づいて設定された所定の漏れ電流特性を有する、
請求項1に記載の振動エネルギー検出装置。 - 前記振動エネルギー算出部は、前記放電制御部の放電によって形成された放電状態の形成回数に基づいて、前記検査対象物に生じた振動エネルギーを算出する、
請求項1又は請求項2に記載の振動エネルギー検出装置。 - 前記振動エネルギー算出部は、前記放電制御部の放電後に振動エネルギーが充電され、前記蓄電部の蓄電圧が前記所定蓄電圧に到達したことで形成される充電状態の形成回数に基づいて、前記検査対象物に生じた振動エネルギーを算出する、
請求項1又は請求項2に記載の振動エネルギー検出装置。 - 前記蓄電部を複数備え、且つ複数の該蓄電部は、それぞれ、前記振動発電装置の発電電力を蓄電可能となるように、互いに該振動発電装置に対して並列に接続され、
前記複数の蓄電部のうち一の蓄電部が前記放電制御部によって放電されているとき、前記振動発電装置の発電電力は、該複数の蓄電部のうち該一の蓄電部を除く他の蓄電部に供給される、
請求項1から請求項4の何れか1項に記載の振動エネルギー検出装置。 - 検査対象物に設置され、該検査対象物にかかる振動に関する情報を取得するセンサモジュールと、該センサモジュールによって取得された情報に基づいて、該検査対象物に生じた振動エネルギーを算出するサーバと、を有する振動エネルギー検出システムであって、
前記センサモジュールは、
検査対象物に設置され、該検査対象物に生じた振動エネルギーを電力変換する振動発電装置と、
前記振動発電装置からの発電電力を蓄電する蓄電部と、
前記蓄電部の蓄電圧を監視する電圧監視部と、
前記蓄電部の蓄電圧が所定蓄電圧を超えたときに、該蓄電部による蓄電エネルギーを放電する放電制御部と、
前記放電制御部の放電によって連続的又は断続的に形成される前記蓄電部の蓄電状態の形成回数を検出する検出部と、
前記検出部によって検出された前記蓄電状態の形成回数に関するデータを、前記サーバに送信する送信部と、を備え、
前記サーバは、
前記送信部から送信された前記蓄電状態の形成回数に関するデータを受信する受信部と、
前記受信部によって受信された前記蓄電状態の形成回数に関するデータに基づいて、該検査対象物に生じた振動エネルギーを算出する振動エネルギー算出部と、
を備える、振動エネルギー検出システム。 - 前記蓄電部は、前記振動発電装置による発電の頻度と該発電による電力量とに基づいて設定された所定の漏れ電流特性を有する、
請求項6に記載の振動エネルギー検出システム。 - 前記振動エネルギー算出部は、前記放電制御部の放電によって形成された放電状態の形成回数に基づいて、前記検査対象物に生じた振動エネルギーを算出する、
請求項6又は請求項7に記載の振動エネルギー検出システム。 - 前記振動エネルギー算出部は、前記放電制御部の放電後に振動エネルギーが充電され、前記蓄電部の蓄電圧が前記所定蓄電圧に到達したことで形成される充電状態の形成回数に基づいて、前記検査対象物に生じた振動エネルギーを算出する、
請求項6又は請求項7に記載の振動エネルギー検出システム。 - 前記センサモジュールは、前記蓄電部を複数備え、
前記複数の蓄電部は、それぞれ、前記振動発電装置の発電電力を蓄電可能となるように、互いに該振動発電装置に対して並列に接続され、
前記複数の蓄電部のうち一の蓄電部が前記放電制御部によって放電されているとき、前記振動発電装置の発電電力は、該複数の蓄電部のうち該一の蓄電部を除く他の蓄電部に供給される、
請求項6から請求項9の何れか1項に記載の振動エネルギー検出システム。
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