JP5396294B2 - Dynamic displacement estimation method and dynamic displacement estimation system for orbit - Google Patents

Description

  The present invention relates to a dynamic displacement estimation method and a dynamic displacement estimation system for estimating a dynamic displacement amount of a track caused by a load of a traveling railway vehicle.

In railway tracks, abnormalities such as softening of the roadbed and outflow of roadbed soil may occur due to the construction work near the railroads such as three-dimensional intersections and the occurrence of natural disasters such as earthquakes. As these abnormalities progress, as a previous stage in which deformation that hinders vehicle travel occurs on the track, temporary track displacement caused by the load of the vehicle when passing the vehicle, that is, dynamic displacement accompanying the vehicle load There is a tendency to increase.
Therefore, if the amount of dynamic displacement of the track can be grasped, it is considered that the abnormality of the track can be detected in advance to effectively prevent accidents.

  Conventionally, as a track displacement monitoring system generally used in construction work near the track, etc., a system using optical track displacement measurement by a laser (see, for example, Patent Document 1) or installed along a rail There is known a system (for example, see Patent Document 2) that measures an inclination angle with a plurality of inclinometers and calculates a settlement amount of a rail from an interval between the inclination angle and the inclinometer.

JP 2003-232611 A JP 2008-169547 A

  By the way, although the track displacement monitoring systems described in Patent Documents 1 and 2 above can measure the static displacement amount of the track (the steady displacement amount of the track where the vehicle is not traveling), the track It is not suitable for measuring the amount of dynamic displacement.

  In other words, when the above monitoring system is applied to the measurement of the dynamic displacement of the track, the track displacement as the vehicle passes must be recorded with time, so that high-speed sampling is possible and a large amount of data can be stored by the sampling. A multi-channel data logger capable of Therefore, the system itself becomes large, and a large capital investment is required, which is not preferable from the viewpoint of cost.

  Furthermore, in order to measure dynamic displacement, it is necessary to continuously monitor the trajectory displacement amount by continuously driving the monitoring system. However, since the battery capacity for driving the monitoring system is limited, long-term monitoring is required. Not suitable for. In this regard, in order to measure the trajectory displacement only when the vehicle passes, it is possible to install a sensor that detects the passage of the vehicle and measure the trajectory displacement only when the sensor detects the vehicle, but the system is complicated. This is not preferable because the cost increases.

  The present invention has been made in view of the above problems, and a method for estimating the dynamic displacement of a track that can more effectively prevent accidents by accurately grasping the amount of dynamic displacement of the track. And it aims at providing a dynamic displacement estimation system.

In order to solve the above problems, the present invention proposes the following means.
That is, the track dynamic displacement estimation method according to the present invention is a track dynamic displacement estimation method for estimating the dynamic displacement of the entire track when a vehicle passes through the track, and the extension direction of the track. A conversion step for converting vibration of the orbit at a plurality of measurement points arranged at predetermined intervals into energy, a storage step for storing the energy at each measurement point, and a unit business period for each measurement point Detecting the amount of energy stored in the unit business period every time the unit business period elapses, and comparing each of the measurement points with the detection value of the energy amount in each unit business period An increase in the dynamic displacement of the trajectory at a point is estimated.

  A dynamic displacement estimation system for a track according to the present invention is a dynamic displacement estimation system for a track that estimates the dynamic displacement of the entire track when a vehicle passes through the track, and the extension direction of the track. Are installed at a plurality of measurement points arranged at predetermined intervals, and conversion means for converting vibration of the trajectory at each measurement point into energy, and storage provided in each conversion means for storing the energy. Means and a detecting means provided in each storage means for detecting the amount of energy stored in the unit business period every time the unit business period elapses.

According to the dynamic displacement estimation method and system of the trajectory having such a feature, vibration due to the dynamic displacement of the trajectory at each measurement point is converted into energy, and the energy is stored and detected for each measurement point.
Here, in railroads, the number of vehicles traveling in a day is determined in advance. Therefore, if there is no abnormality in the track, the amount of energy stored in each measurement point every time the unit business period elapses Every time it shows a substantially constant value. However, if the amount of dynamic displacement of the track increases at a specific measurement point due to an abnormality in the roadbed or track, the vibration energy increases with this, so the amount of energy stored at the measurement point is normal. Increased compared to
Accordingly, in the present invention, the amount of energy stored for each unit business period at each measurement point is detected, and the amount of energy in each unit business period is compared with each other, thereby directly measuring the amount of dynamic displacement. Even without this, an increase in the amount of dynamic displacement can be detected indirectly.

  Moreover, in the dynamic displacement estimation method of the track of the present invention, the conversion step is a step of converting vibration of the track into electric energy by a power generation mechanism installed at the measurement point, and the storage step is Preferably, the electric energy is stored in a capacitor.

  Furthermore, in the dynamic displacement estimation system for a track of the present invention, the conversion means is a power generation mechanism that converts vibration of the track at the measurement point into electric energy, and the storage means stores the electric energy. It is preferable that the capacitor be a capacitor.

  According to the dynamic displacement estimation method and system of the trajectory having such characteristics, the vibration energy at each measurement point is converted into electric energy by the power generation mechanism, and the electric energy is stored in the capacitor for each measurement point. The stored energy can be reliably detected based on the dynamic displacement of the trajectory. Therefore, by comparing the electric energy amount at each measurement point between unit business periods, it is possible to accurately detect an abnormality in the roadbed or the track.

  Furthermore, in the dynamic displacement estimation method for a track of the present invention, the conversion step includes a step of converting the vibration of the track at each measurement point into the electrical energy by the plurality of power generation mechanisms having different natural frequency bands. The storage step is a step of storing the electric energy in a plurality of capacitors provided for each of the power generation mechanisms, and the detection step includes an energy amount for each of the power generation mechanisms from each of the capacitors. It is preferable that it is the process of detecting.

  Further, in the dynamic displacement estimation system for a trajectory according to the present invention, the conversion means is a plurality of the power generation mechanisms having different natural frequency bands, and the storage means supplies the electric energy for each power generation mechanism. It is preferable that the plurality of capacitors to be stored, wherein the detection unit detects an energy amount for each of the power generation mechanisms from each of the capacitors.

  Here, the frequency band of vibration due to the dynamic displacement of the track shows a different range corresponding to the abnormal part of the track, that is, when there is an abnormality in the rail or sleeper, for example, vibration in a relatively high frequency band is present. When there is an abnormality such as a cavity in the roadbed, vibration in a relatively low frequency band occurs. Therefore, by installing a plurality of power generation mechanisms with different natural frequency bands at each measurement point, separately detecting the total electrical energy generated by these power generation mechanisms for each power generation mechanism, and comparing the magnitudes It is possible to estimate a specific abnormal portion of the trajectory when the dynamic displacement increases.

  Moreover, in the dynamic displacement estimation method of the trajectory according to the present invention, communication for transmitting the detected value of the energy amount for each capacitor detected by the detecting step using the electrical energy stored in the capacitor. It is preferable to further include a process.

  Furthermore, in the dynamic displacement estimation system for the trajectory of the present invention, the communication means for transmitting the detected value of the energy amount for each capacitor detected by the detecting means using the electrical energy stored in the capacitor. It is preferable to further comprise.

  As described above, the electrical energy stored in the capacitor is regenerated and used in the communication process, so that remote monitoring can be performed while saving power.

  According to the dynamic displacement estimation method and system of the present invention, the energy amount stored at the time of the unit business period is detected for each measurement point, and the energy amount of the unit business period is compared with each other to An increase in the amount of mechanical displacement can be easily detected. As a result, it is possible to appropriately grasp the abnormality of the trajectory based on the dynamic displacement and further prevent accidents.

It is a figure which shows the outline | summary of the dynamic displacement estimation method and system of a track | orbit of 1st Embodiment. It is a figure which shows the outline | summary of the track | orbit to which the dynamic displacement estimation method and system of a track | orbit are applied. It is a graph which shows the relationship between the energy amount stored at the time of unit business period progress, and the dynamic displacement amount of a track. It is a figure which shows the outline | summary of the dynamic displacement estimation method and system of a track | orbit concerning 2nd Embodiment. It is a figure which shows the other structure of an electric power generation mechanism.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A dynamic displacement estimation system 10 according to the first embodiment shown in FIG. 1 includes a dynamic displacement detector 11 installed for each measurement point 2 described later, a plurality of these dynamic displacement detectors 11 and a communication line 12. The communication means 50, the warning light 60, and the warning buzzer 70 are connected via the cable.

  Here, in the track 1 to which the dynamic displacement estimation system 10 is applied, as shown in FIG. 2, a large number of sleepers 5 are spaced from each other at a predetermined interval on a road bed 3 installed so as to cover the roadbed 4. The rails 6 are arranged in parallel to each other, and rails 6 are laid on the sleepers 5. In addition, in this embodiment, the place of every other sleeper 5 arrange | positioned at intervals of about 1.5 m among many sleepers 5 is set as the measurement point 2, respectively. In addition, the measurement point 2 does not necessarily need to be the location of the sleepers 5, and the arrangement interval of the measurement points 2 can be arbitrarily determined.

  In such a track 1, for example, when an abnormality such as a cavity 7 occurs in the roadbed 4 as shown in FIG. 2, only when the vehicle 8 passes above the cavity 7, it is temporarily caused by the load of the vehicle 8. Orbital displacement may occur. Such temporary displacement of the track 1 due to the vehicle load is referred to as dynamic displacement, and the dynamic displacement estimation system 10 of this embodiment is used for the purpose of estimating the amount of dynamic displacement.

  The dynamic displacement detector 11 is installed at each of the measurement points 2 described above. As shown in FIG. 1, the vibration converter (converter) 20, the capacitor (storage means) 30, the voltage converter 41, and The detection means 40 which consists of the control part 42 is provided. In FIG. 1, the details of the components of only one dynamic displacement detector 11 among the plurality of dynamic displacement detectors 11 are shown, and the components of the other dynamic displacement detectors 11 are described. Omitted. The communication line 12 is connected to the control unit 42 in each dynamic displacement detection unit 11.

  The vibration converting unit 20 includes an elastic body 23 having one end fixed to the support body 21 and extending in the horizontal direction, a weight 22 fixed to the other end of the elastic body 23, and a weight 22 attached to the vibration of the elastic body 23. A power generation mechanism 25 composed of the piezoelectric element 24 that collides is formed. With such a configuration, in the vibration conversion unit 20, the elastic body 23 vibrates with the occurrence of dynamic displacement on the track 1, and at this time, the weight 22 collides with the piezoelectric element 24 to generate power. .

  The capacitor 30 is composed of, for example, a dielectric and a pair of electrode plates separated by the dielectric, and is electrically connected to the piezoelectric element 24 in order to store the electric energy generated by the vibration conversion unit 20. ing. In addition, if the electrical energy by the vibration conversion part 20 can be stored, it will not be restricted to the said capacitor 30, For example, you may employ | adopt other electric power storage mechanisms, such as a secondary battery.

  The voltage conversion unit 41 is configured to measure the voltage value between the pair of electrode plates of the capacitor 30 and convert the measured voltage value into a voltage signal suitable for input to the control unit 42. Here, the voltage value between the electrode plates of the capacitor 30 is a value corresponding to the sum of the stored electrical energy. Therefore, the voltage conversion unit 41 detects the sum of the electric energy stored in the capacitor 30 by measuring the voltage value between the pair of electrode plates.

  The control unit 42 responds to the voltage value measured by the voltage conversion unit 41 from the voltage conversion unit 41 every time a preset unit business period elapses, that is, the total amount of electric energy stored in the capacitor 30. Get the signal. In the present embodiment, the control unit 42 and the voltage conversion unit 41 constitute detection means 40 that detects the amount of energy stored within the unit business period every time the unit business period elapses.

  The control unit 42 sends a signal corresponding to the value of the electric energy stored in the capacitor 30 during the unit business period to the communication unit 50 every time the unit business period elapses. Further, the control unit 42 may be configured such that the control unit 42 cannot obtain a signal from the voltage conversion unit 41 when the amount of electrical energy stored in the capacitor 30 exceeds a predetermined threshold, or when a unit business time has elapsed. When an abnormality occurs, a command to turn on or sound the warning lamp 60 and the warning buzzer 70 is sent.

  Here, the unit business period means, for example, a business period in which the railway vehicle is operated such as one day, several days, one week, or one month. In railroads, since the number of vehicles traveling in one day is determined in advance, the number of vehicles traveling during this unit business period is substantially constant. The unit business period is not limited to one day as long as the number of passing vehicles is substantially constant, but may be a short period such as several hours or several tens of minutes.

  In response to a signal from the control unit 42, the communication means 50 converts the amount of electrical energy generated during each unit business period at each dynamic displacement detection unit 11, that is, each measurement point 2, to a computer ( (Not shown) is transmitted wirelessly. As a result, the computer acquires data on the amount of electrical energy in the unit business period at each measurement point 2.

  In addition, the communication unit 50 in the present embodiment is configured to be driven using electric energy stored in the capacitor 30. That is, the control unit 42 transmits a part of the electrical energy stored in the capacitor 30 to the communication unit 50 at the same time as sending the signal to the communication unit 50, and the communication unit 50 transmits the transmitted signal. Electric energy is regenerated and electric energy amount data is wirelessly transmitted to the base station computer.

  Note that the communication means 50, the warning light 60, and the warning buzzer 70 are installed at intervals for each predetermined section of the track 1, and the communication lines 12 are connected to the plurality of dynamic displacement detectors 11 as shown in FIG. Connected through.

  Next, a dynamic displacement estimation method by the dynamic displacement estimation system 10 having such a configuration will be described. The vibration of the track 1 when the vehicle 8 passes through the track 1 is converted into electric energy by the vibration conversion unit 20 of the dynamic displacement detection unit 11 installed at each measurement point 2 (conversion step). Is stored in the capacitor 30 for each vibration converter 20 (storage step). The electrical energy stored in the capacitor 30 is measured by the voltage conversion unit 41 as the voltage value of the pair of electrode plates in the capacitor 30, and the control unit 42 determines the voltage value of the capacitor 30 every unit business period, that is, The total amount of electrical energy stored during the unit business period is detected (detection process).

  Thereafter, a signal corresponding to the total amount of electrical energy stored during the unit business period is sent from the control unit 42 to the communication means 50. The communication means 50 wirelessly transmits the electric energy amount data input from each dynamic displacement detector 11 to the base station computer (communication step).

  Here, in the railway, since the number of vehicles traveling within the unit business period is determined in advance as described above, when there is no abnormality in the track, the work given from the vehicle 8 to the track 1, that is, vibration energy. The amount is generally constant. Accordingly, it is considered that the amount of electrical energy stored at each measurement point during a unit business period in a normal state is generally constant regardless of the unit business period.

  However, for example, when an abnormality such as the formation of a cavity 7 in the roadbed 4 as shown in FIG. 2 occurs, the amount of dynamic displacement when the vehicle passes through the abnormal part increases. Such an increase in the amount of dynamic displacement causes an increase in vibration energy when the vehicle 8 passes through the abnormal part, and as a result, as shown in FIG. 3, it is arranged at the measurement point 2 on the abnormal part. The amount of energy by the vibration converting unit 20 increases. Such an increase in the amount of dynamic displacement is not only when a cavity is generated in the roadbed 4 but also when other abnormalities such as floating sleepers and breakage of the rail occur on the track 1. To happen.

  Therefore, by comparing the detection value of the electric energy amount in each unit business period obtained by the dynamic displacement estimation system 10 and the dynamic displacement estimation method for each measurement point 2, the motion of the track 1 at each measurement point 2 is compared. It is possible to estimate the increase or decrease in the amount of mechanical displacement.

  That is, in this embodiment, the amount of electrical energy stored at the time of unit business period is detected for each measurement point 2 and the amount of dynamic displacement is increased by comparing the energy amounts of each unit business period with each other. Can be easily detected. As a result, it is possible to appropriately grasp the abnormality of the track 1 based on the dynamic displacement and further prevent accidents from occurring.

  Further, in the dynamic displacement estimation system and method of the present embodiment, the vibration conversion unit 20 (power generation mechanism 25) at each measurement point 2 generates power by vibration energy and is stored in the capacitor 30 every unit business hours. Since it is only necessary to monitor the amount of electrical energy, very little energy is required for the measurement itself. Further, for example, by regenerating the electrical energy itself stored in the capacitor 30 in the entire system such as driving of the control unit 42, energy necessary for measurement can be further saved.

  In the present embodiment, the communication means 50 is driven using the electrical energy accumulated in the capacitor 30 by the vibration conversion unit 20, that is, the electrical energy stored in the capacitor 30 is regenerated and used for the communication process. Therefore, remote monitoring can be performed while saving power. Therefore, even when the communication means 50 is battery-driven, it is possible to constantly monitor over a long period without worrying about the problem of insufficient battery capacity.

Next, a second embodiment of the present invention will be described. The second embodiment is different from the first embodiment in the configuration of the dynamic displacement detector 11.
That is, as shown in FIG. 4, the dynamic displacement detection unit 80 of the second embodiment includes a vibration conversion unit 81 including a plurality of (three in this embodiment) power generation mechanisms 25A, 25B, and 25C, and each power generation unit. Capacitors 30, 30, 30 provided for each mechanism 25 A, 25 B, 25 C, voltage converters 41, 41, 41 connected to the capacitors 30, 30, 30, and these voltage converters 41, 41, 41 respectively The detection means 40 which consists of the connected single control part 42 is provided.

  The vibration converting unit 81 includes a base plate 82 having a substantially plate shape, and three supports 21A, 21B, and 21C are installed on the base plate 82 with a space therebetween. One end of each of the elastic bodies 23A, 23B, and 23C having different lengths in the extending direction is fixed to the support bodies 21A, 21B, and 21C, and a weight 22A is attached to the other end of the elastic bodies 23A, 23B, and 23C. , 22B and 22C are fixed. Further, on the base plate 82, piezoelectric elements 24A, 24B, and 24C are disposed, on which the weights 22A, 22B, and 22C collide when the elastic bodies 23A, 23B, and 23C vibrate, respectively.

  That is, the vibration converting unit 81 is provided with three power generation mechanisms 25A, 25B, and 25C each composed of elastic bodies 23A, 23B, and 23C, weights 22A, 22B, and 22C, and piezoelectric elements 24A, 24B, and 24C. The power generation mechanisms 25A, 25B, and 25C have different response frequency bands because the elastic bodies 23A, 23B, and 23C have different lengths. In particular, in the present embodiment, the elastic body 23A of the power generation mechanism 25A located on the left side of FIG. 4 is designed to be the longest, and the elastic body 23C of the power generation mechanism 25C located on the right side of FIG. The response frequency bands of the power generation mechanisms 25A, 25B, and 25C are set to be the lowest for the power generation mechanism 25A and the highest for the power generation mechanism 25C. Not only the lengths of the elastic bodies 23A, 23B, and 23C are different, but also the weights of the weights 22A, 22B, and 22C are different, so that the response frequency bands of the power generation mechanisms 25A, 25B, and 25C are different. May be.

  In this vibration conversion unit 81, each power generation mechanism 25A, 25B, 25C is provided with a capacitor 30 and a voltage conversion unit 41 so that the electric energy generated by each power generation mechanism 25A, 25B, 25C can be stored and detected. It is configured. The stored amount of electrical energy for each of the power generation mechanisms 25A, 25B, and 25C is sent from the control unit 42 to the communication means 50 (not shown in FIG. 4) via the communication line 12, and the communication means 50 transmits the base station. Wirelessly transmitted to other computers.

  Here, the frequency band of the vibration due to the dynamic displacement of the track 1 shows a different band corresponding to the specific abnormal part of the track 1, that is, when there is an abnormality in the rail 6 or the sleeper 5, for example. When the roadbed 4 vibrates in a high frequency band and there is an abnormality such as a cavity in the roadbed 4, it vibrates in a relatively low frequency band.

  Therefore, as in this embodiment, a plurality of power generation mechanisms 25A, 25B, and 25C having different response frequency bands are installed in the vibration conversion unit 81, and the storage amount of electric energy for each power generation mechanism 25A, 25B, and 25C is set. By detecting and comparing the magnitudes, it is possible to estimate a specific abnormal portion of the trajectory 1 when the dynamic displacement increases.

  Further, when only a single power generation mechanism 25 is provided, the frequency band in which vibration based on the dynamic displacement of the track 1 can be detected is left only to the natural frequency band of the power generation mechanism 25. By providing a plurality of power generation mechanisms 25A, 25B, and 25C having different frequencies, it is possible to monitor vibrations in a wide frequency range.

As mentioned above, although embodiment of this invention was described in detail, unless it deviates from the technical idea of this invention, it is not limited to these, A some design change etc. are possible.
For example, in the embodiment, the power generation mechanism 25 including the weight 22, the elastic body 23, and the piezoelectric element 24 has been described. For example, as shown in FIG. 5 as a modification, the power generation mechanism using the electret material 27 is used. 26 may be adopted.

The power generation mechanism 26 of the modified example includes an electret material 27 instructed to the support 21 via an elastic body 23, and an electrode substrate 28 arranged to face the electret material 27, and the dynamic displacement of the track 1 When the vibration is generated by the above, the position of the electret material 27 and the electrode substrate 28 is displaced due to the vibration, so that electric energy is generated in the electrode substrate 28. Thereby, similarly to the embodiment, vibration based on the dynamic displacement of the track 1 can be appropriately converted into electric energy.
Further, the configuration is not limited to the power generation mechanisms 25 and 26, and a power generation mechanism having another configuration may be adopted as long as the vibration energy of the track 1 can be converted into electric energy.

  Furthermore, in the embodiment, the electric energy amount based on the dynamic displacement of the trajectory 1 detected by each dynamic displacement detector 11 is wirelessly transmitted to the computer of the base station via the communication unit 50. For example, as a configuration in which the total amount of electric energy is displayed on the dynamic displacement detection unit 11 itself, the patrol person directly confirms this display to determine the total amount of electric energy at each measurement point 2. It is good also as a structure to acquire. In this case, since the communication means 50 is not required, the system can be further simplified.

  In the embodiment, the vibration based on the dynamic displacement of the track 1 is converted into electric energy. Instead, the vibration is stored as mechanical energy in, for example, a flywheel, and the mechanical The configuration may be such that the dynamic displacement is estimated by detecting energy. Even in this case, similarly to the embodiment, by estimating the amount of dynamic displacement of the track 1, it is possible to appropriately grasp the abnormality of the track 1 based on the dynamic displacement and effectively prevent accidents. Can do.

DESCRIPTION OF SYMBOLS 1 Trajectory 2 Measuring point 10 Dynamic displacement estimation system 11 Dynamic displacement detection part 12 Communication line 20 Vibration conversion part (conversion means)
21 Support body 22 Weight 23 Elastic body 24 Piezoelectric element 25 Power generation mechanism 26 Power generation mechanism 27 Electret material 28 Electrode substrate 30 Capacitor (storage means)
40 detection means 41 voltage conversion part 42 control part 50 communication means 80 dynamic displacement detection part 81 vibration conversion part (conversion means)
82 Base plate

Claims (8)

A method for estimating a dynamic displacement of a trajectory for estimating a dynamic displacement of the entire trajectory when the vehicle passes through the trajectory,
A conversion step of converting vibration of the orbit at a plurality of measurement points arranged at predetermined intervals in the extending direction of the orbit into energy;
A storage step of storing the energy for each measurement point;
A detection step for detecting the amount of energy stored within the unit business period for each measurement point, for each unit business period; and
The dynamic displacement estimation of the trajectory is characterized by estimating an increase in the dynamic displacement of the trajectory at each measurement point by comparing the detected value of the energy amount in each unit business period for each measurement point. Method. The conversion step is a step of converting the vibration of the orbit into electric energy by a power generation mechanism installed at the measurement point,
The method according to claim 1, wherein the storing step is a step of storing the electric energy in a capacitor. The conversion step is a step of converting vibration of the orbit at each measurement point into the electric energy by a plurality of the power generation mechanisms having different natural frequency bands,
The storing step is a step of storing the electrical energy in a plurality of the capacitors provided for each of the power generation mechanisms,
The method according to claim 2, wherein the detecting step is a step of detecting an energy amount for each of the power generation mechanisms from each of the capacitors.   The communication step of transmitting the detected value of the energy amount for each of the capacitors detected by the detection step by using the electrical energy stored in the capacitor, further comprising: The method for estimating the dynamic displacement of the trajectory as described. A dynamic displacement estimation system for a track that estimates a dynamic displacement of the entire track when the vehicle passes the track,
Conversion means installed at each of a plurality of measurement points arranged at predetermined intervals in the extending direction of the track, and converting vibration of the track at each measurement point into energy;
A storage means provided in each of the conversion means for storing the energy;
A detecting means for detecting the amount of energy stored in each storage means and stored in the unit business period every time the unit business period elapses. The conversion means is a power generation mechanism that converts vibration of the orbit at the measurement point into electric energy,
6. The dynamic displacement estimation system for a trajectory according to claim 5, wherein the storage means is a capacitor for storing the electric energy. The conversion means is a plurality of the power generation mechanisms having different natural frequency bands,
The storage means is a plurality of the capacitors that store the electrical energy for each of the power generation mechanisms,
The trajectory dynamic displacement estimation system according to claim 6, wherein the detection unit detects an energy amount for each power generation mechanism from each capacitor.   8. The communication device according to claim 6, further comprising: a communication unit that transmits a detection value of the amount of energy for each capacitor detected by the detection unit using the electrical energy stored in the capacitor. Dynamic displacement estimation system for orbits.

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