Track material monitoring system

Abstract

To provide a track material monitoring system which can acquire images of track materials in the whole range including respective track numbers in a station yard.SOLUTION: In a monitoring system provided with a track material monitoring device and plural ground units installed along a track, the plural ground units include first ground units installed in exits in a station yard of a main line, second ground units installed in entrances in the station yard of the main line and third ground units installed in side lines other than the main line in the station yard. The acquisition of data of the main line is started when the first ground unit is detected, the acquisition of data of the main line in the station yard or the side lines is started when the second ground unit is detected, the acquired data is stored as the data of the side lines along with the establishment of a first condition when the second ground unit and the third ground unit are detected successively, and the acquired data is stored as the data of the main line in the station yard along with the establishment of a second condition when the third ground unit is not detected by the movement of a prescribed distance after the detection of the second ground unit.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a track material monitoring system that is mounted under a vehicle and runs on the rails while inspecting track materials such as rails, sleepers, rail fastening devices, and track pads. [Background technology]

[0002] In railway tracks, track materials such as rails, sleepers, rail fastening devices, and track pads are regularly inspected. Conventionally, such track material inspections have been carried out by measuring the amount of displacement using a laser displacement sensor or a distance meter, acquiring images using an imaging device, and detecting abnormalities by visual inspection or calculating the distance by image processing. In addition, inspection cars specialized for rail inspection have also been put to practical use. An example of an invention relating to abnormality detection using an image captured by an imaging device is described in Patent Document 1.

[0003] On the other hand, the applicant has developed and put into practical use a track material monitoring system that mounts an imaging device under the body of a commercial vehicle, continuously captures images of the vicinity of the rail while the vehicle is running on the rail, and detects abnormalities based on the captured images. Furthermore, upon detailed consideration of the specific application of this track material monitoring system to commercial lines, it was found that, depending on the station, trains may turn around or enter a different track than usual in the event of an abnormality such as a timetable disruption, so if the imaging device is operated continuously to capture images, it becomes difficult to tell which part of the rail was captured in the image.

[0004] Therefore, we decided to install a battery-free position locating ground coil called Data Depot (registered trademark) at the entrance point within the station, start acquiring images when the on-board device detects this position locating ground coil, and end image acquisition just before the next station based on the travel distance, repeating this process to acquire images of the track material over the entire line. In other words, we decided not to acquire images of the track within the station premises. Conventionally, the position locating ground coil stores information such as an identification number and kilometres, and is installed on sleepers near the rails. Vehicles running on the rails are equipped with receivers that read the information stored in the ground coil without contact, and are used to read position information from the ground coil while the vehicle is running to grasp information such as the vehicle's position and the distance to a specified point. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2011-214933 A [Patent Document 2] JP 2016-133857 A Summary of the Invention [Problem to be solved by the invention]

[0006] The track material monitoring system that the applicant has put into practical use was configured to acquire images from the entrance point within the station to just before the next station, so there was a problem in that images of the track materials on the main line and platform tracks within the station could not be obtained. Therefore, we conducted a study to develop a track material monitoring system that can obtain images of the track materials of the main line and platform tracks within the station premises. As a result, we found that by installing position locating ground coils at the entrances and exits of each platform within the station premises, it is possible to obtain images of the track materials without causing misidentification even when turnaround operations are occurring.

[0007] However, installing a position locating ground coil at every entrance and exit of each track would increase the number of ground coils, which would lead to an increase in costs.In addition, since the imaging device cannot start imaging immediately when it is desired to operate it, but requires a certain standby time, it became clear that there would be a problem that images could not be captured in some places if imaging was started and stopped simply by detecting a position locating ground coil.

[0008] Patent Document 2 describes an invention in which a maintenance vehicle equipped with an imaging device is given the ability to recognize its own position with high precision using a ground coil and distance traveled (in kilometers), but this document does not disclose the acquisition of images of the track materials of tracks within a station. The present invention has been made in response to the above-mentioned problems, and its purpose is to provide a track material monitoring system that can acquire images of almost all areas of track materials, including each track within a station, without incurring a significant increase in cost, and that can avoid areas where images cannot be acquired. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention provides A track material monitoring device having an inspection means mounted on a vehicle for inspecting the vicinity of a rail, a storage means for storing data acquired by the inspection means, a data transfer means for transferring data stored in the storage means, and a control means, and a track material monitoring system including a plurality of ground coils installed along a track on which the vehicle runs and each storing at least its own identification code, the plurality of ground coils include a first ground coil installed at an exit of a station premises of a main line, a second ground coil installed at an entrance of the station premises of the main line, and a third ground coil installed on a side track other than the main line in the station premises; The control means When the first ground coil is detected, the inspection means starts acquiring data on the main line; When the second ground coil is detected, the inspection means starts acquiring data on the main line or the siding in the station premises; when the second ground coil and the third ground coil are detected in order, the data acquired by the inspection means is stored in the storage means as side track data in response to the establishment of a first condition; If the third ground coil is not detected before moving a predetermined distance after detecting the second ground coil, the data acquired by the inspection means is stored in the memory means as data of the main line within the station when the second condition is met.

[0010] According to the track material monitoring system configured as described above, it is equipped with a first ground coil installed at the station exit point on the main line, a second ground coil installed at the station entrance point on the main line, and a third ground coil installed on a siding other than the main line within the station, so that it is possible to obtain images of almost all areas of the track material, including the sidings (each track) within the station, without incurring a significant increase in cost, and it is possible to avoid having areas where images cannot be obtained.

[0011] Here, preferably, A time period for acquiring data by the inspection means is set in advance, and the time period is divided into a first time period and a second time period; The first condition is the first time period other than the time when the acquired data is transferred by the data transfer means, and the second condition is the second time period other than the time when the acquired data is transferred by the data transfer means. According to this configuration, if the data acquisition time period is set to, for example, nighttime, inspection data (images) of the track materials on the main line and inspection data (images) of the track materials within the station premises can be acquired and stored at night when the imaging conditions provided by the lighting devices are stable, so that the condition of the track materials can be accurately determined based on the recorded data.

[0012] Furthermore, the inspection means is an imaging means, The first condition is a daytime period other than the time when the acquired data is transferred by the data transfer means, and the second condition is a nighttime period other than the time when the acquired data is transferred by the data transfer means. According to this configuration, inspection data (images) of important main line track materials are acquired at night when the imaging conditions by the lighting device are stable, and are stored, so that the condition of the track materials can be accurately determined based on the recorded data. In addition, inspection data (images) of track materials for sidings (each track) within the station is acquired during the daytime when trains run more frequently than at night, so it is possible to avoid having areas where inspection data (images) cannot be obtained.

[0013] Furthermore, preferably, even if the first condition is satisfied, the control means will not allow the inspection means to start acquiring data if data for the main line in the relevant range has not been acquired. With this configuration, when the imaging device has a standby time, it is possible to avoid a situation in which important inspection data (images) of the track materials of the main line is not acquired due to starting to acquire inspection data (images) of the track materials of the siding (each track).

[0014] Also, preferably, the track material monitoring device includes a rotation detection means for detecting the number of rotations of the wheels or axles of the vehicle, The storage means stores data indicating a relationship between the first or second ground coil and a recording distance, The control means a function of calculating a travel distance of the vehicle based on the number of rotations detected by the rotation detection means; Upon detection of the first or second ground coil, the inspection means starts acquiring data for the main line or siding, the recorded distance corresponding to the detected first or second ground coil is read from the storage means, and the acquisition of data by the inspection means is terminated when the vehicle has moved the read recorded distance.

[0015] According to the above-described configuration, the acquisition of inspection data (images) that begins upon detection of a ground sensor is terminated when the vehicle moves a preset recording distance. Therefore, compared to a case in which a separate ground sensor is provided for indicating the end, the number of ground sensors to be installed can be reduced, and a significant increase in costs can be avoided.

[0016] Also, preferably, in a station premises where a plurality of sidings are provided in parallel with a main line, at least one third ground coil is provided for each siding, The control means determines the route traveled by the vehicle based on the detection order of the second ground sensor and the third ground sensor, and if the route matches a preset route, stores the data acquired by the inspection means in the memory means for each route. According to this configuration, the route traveled by the vehicle is determined based on the detection order of the ground coils, and if it matches a preset route, the acquired data for each route is stored in the storage means. Therefore, in a case where the vehicle makes a turnaround operation, it is possible to avoid losing track of the location where the stored data was obtained, and the condition of the track material can be accurately determined based on the recorded data. Effect of the Invention

[0017] The track material monitoring system of the present invention has the advantage of being able to acquire images of almost all areas of track materials, including each track within a station, without incurring a significant increase in cost, and of being able to avoid areas where images cannot be acquired. [Brief description of the drawings]

[0018] [Figure 1] 1 is a block diagram showing an example of the configuration of a track material monitoring device constituting a track material monitoring system according to the present invention; [Diagram 2] FIG. 11 is a diagram showing an example of a reference table storing information related to a position locating ground coil in the track material monitoring system of the embodiment. [Diagram 3] FIG. 2 is a layout diagram showing an example of the installation of a position locating ground coil in a track material monitoring system according to an embodiment. [Figure 4] 10 is a flowchart showing a processing procedure when a main line start ground coil is detected in the track material monitoring system of the embodiment. [Diagram 5] 10 is a flowchart showing the processing procedure when a premises start ground coil is detected in the track material monitoring system of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of a track material monitoring system according to the present invention will be described with reference to the drawings. FIG. 1 shows a functional block diagram of an example of the configuration of a track material monitoring device that constitutes the system of this embodiment.

[0020] The track material monitoring device 10 of this embodiment is a device mounted on a vehicle, and is composed of an imaging device 11 installed under the vehicle to capture images of the vicinity of the rail, a laser displacement sensor 12 to measure the shape of the object to be measured, a power receiver 13 to read information from a position locating ground coil installed on a sleeper in a non-contact manner, a storage device 14 to store information on the position locating ground coil (equipment identification code) and information on the installation position of the ground coil (kilometers) in advance and to store image data captured by the imaging device 11, a speed generator 15 to detect the vehicle speed, a control device 16 to process information based on input from the power receiver 13 and the speed generator 15, a NAS (Network Attached Storage) 17 which is a large-capacity storage device to save the image data stored in the storage device 14, and a wireless communication device 18 to wirelessly communicate with a device on the ground side. In addition, although not shown, the device is equipped with a lighting device that is turned on when the imaging device 11 captures images of track materials at night. The NAS 17 is composed of a hard disk or the like, and when a certain amount of data is accumulated, it is removed from the system, the storage device is read, and the data is sent to data analysis processing. Alternatively, the NAS 17 may be provided on the ground, and the image data stored in the storage device 14 may be transmitted by wireless communication using the wireless communication device 18 and stored therein.

[0021] The storage device 14 stores information on the position locating ground coil (equipment identification code) and type information, information on the location where the ground coil is installed (kilometers), recording distance (length of the section where shooting and measurement are performed), and track number information at the station where the ground coil is installed in the form of a table as shown in Fig. 2. The control device 16 calculates the travel distance based on the input from the speed generator 15 and calculates the position of the vehicle (kilometers) from the starting position and travel distance, and has the function of determining the position of the position locating ground coil by referring to the table (Fig. 2) in the storage device 14 based on the equipment identification code of the position locating ground coil read from the position locating ground coil by the power receiver 13, and generating and outputting a control signal that instructs the imaging device 11 to start and end shooting and store the captured image based on the type information of the ground coil. Note that the table shown in Fig. 2 is an example, and the format is not important as long as the information required for control and calculation processing is stored.

[0022] The position locating ground coil installed on the sleepers is a type of RFID (Radio Frequency Identification) tag that incorporates a memory for storing data, an antenna (coil) for transmitting and receiving data, a transmission circuit (coil drive circuit), a power supply circuit such as an AC-DC converter, and the like, and transmits the stored information without a power supply. In the railway field, an RFID device called Data Depot (registered trademark) is known, and such a device can also be used as the position locating ground coil in the system of this embodiment.

[0023] In the track material monitoring system of this embodiment, image capture is started when a position locating ground coil for instructing the start of image capture is detected, and image capture is stopped when a preset distance (cumulative kilometres) is reached for each area called a block. The system is also provided with an "inside station mode", in which the time is monitored as the timing for capturing images of track materials within the station. Shape measurement by the displacement sensor 12 may be performed at the same timing as that of the image capture by the imaging device 11, or may be performed at a different timing. In the following explanation, only the timing of image capture by the imaging device 11, which is a feature of the present invention, will be explained, and the timing of shape measurement by the displacement sensor 12 will be omitted.

[0024] In addition, in the track material monitoring system of this embodiment, five types of position locating ground coils are provided: a ground coil for indicating the start of the main line, a ground coil for indicating the end of the main line, a ground coil for identifying track numbers, a ground coil for indicating the start of the yard, and a ground coil for identifying track numbers. The five types of ground coils can be identified by storing type codes in an internal memory. Note that a reference table in which one of the type codes is written for each identification code of the ground coil may be stored in the storage device 14 constituting the on-board track material monitoring device, and only the identification code may be stored in the memory of the ground coil.

[0025] An example of the arrangement of a route map and position locating ground coils to which the track material monitoring system of this embodiment is applied is shown in Fig. 3. In Fig. 3, the solid lines represent the main line rails, and the dashed lines represent the number rails (sidings) of each station. Also, the circle marks represent ground coils for indicating the start of the main line, the black marks represent ground coils for indicating the end of the main line, the triangle marks represent ground coils for track recognition, the square marks represent ground coils for indicating the start of the yard, and the black marks represent ground coils for the yard track. In Fig. 3, ST1, ST2, and ST3 are stations, and among these, ST1 is a station with a platform where express trains wait when passing, ST2 is a major station with a waiting platform and storage tracks, and ST3 is a station with a shared platform for both up and down trains and where turnaround operation is possible. In the following explanation, the area including station ST1 to the left of ST2 is called Area A, the area including station ST3 to the right of ST2 is called Area B, and station ST2 is called the area boundary station.

[0026] The ground sensor ● for indicating the end of the main line is installed to avoid recording an image of the main line if, for some reason, a vehicle enters the track while continuing to photograph the main line tracks.If a ground sensor ● for indicating the end of the main line is detected after a ground sensor □ for indicating the start of the yard is detected, it will determine that the vehicle has entered track (♯), stop recording, and discard the stored image. On the other hand, if the ground sensor □ for indicating the start of the premises is detected, but the ground sensor ● for indicating the end of the main line is not detected, the images taken up to that point are used as images of the main line track, and photographing continues until the recording distance is reached, and the acquired images are stored. Note that the ground sensor △ for identifying the track number and the ground sensor ■ for the premises track number can also be installed as the same type of ground sensor.

[0027] In addition, if a ground coil for track identification △ is detected after a ground coil for indicating the start of the premises □ is detected, the captured image is stored as a captured image of the track of the track. At this time, based on the identification code received from the ground coil for track recognition △, even if there are multiple tracks at the station, the track (route) that was passed through is identified and the captured image of the track is stored. In addition, at stations where a ground contact ○ for indicating the start of the main line is installed at the exit within the station (area boundary station ST2 in Figure 3), the main line is also treated as a track number.

[0028] Next, features of the procedure for photographing track materials in the track material monitoring system of this embodiment will be described using as an example the passage through the section (areas A to B) shown in FIG. When a vehicle attempts to enter Area A in Figure 3, if it is the first time that the vehicle is entering Area A after image data has been retrieved from NAS17 and NAS17 has become empty, the detection of the ground sensor ○ indicating the start of the main line will trigger the recording (photographing and storing) of the main line track material image.

[0029] On the other hand, when a vehicle attempts to enter Area A, if it is its second time entering during daytime hours, recording of main line images will be stopped. When recording of main line images ends and it is not the time for transferring the recorded image data, if a ground coil □ for indicating the start of transfer within the station is detected, the system will switch to "station premises mode" and start recording images of track material within the station premises. In other words, during daytime hours, recording images of track material within the station premises is given priority. As a result, when recording main line track images, if the first run of the day is during the daytime, the images captured during the first run are stored for the time being, and main line track images captured at night are recorded every time thereafter. This is because lighting equipment is used for nighttime photography, and good images can be captured under more stable conditions at night.

[0030] After the train passes through the area boundary station ST2, the mode switches back to "main line mode" when the ground coil ○ for indicating the start of the main line is detected, and recording of main line track material images begins. The "station premises mode" has the function of switching modes by time period, and the function of recording track material images separately for each passing track (route) within the area boundary station. In addition, the track material monitoring device of this embodiment has a function of transferring the recorded image data of the track material from the storage device 14 to the NAS 17 in a batch during a specified time period in the early morning. Furthermore, when images of track material are acquired by traveling multiple times over the same location during nighttime photography, the control device 16 judges superiority or inferiority using so-called tournament logic and overwrites and saves the image with the higher clarity in the storage device 14. On the other hand, for images of track material at the same location within a station, the latest image data is overwritten and saved in the storage device 14 without using tournament logic.

[0031] Next, the image recording procedure executed by the control device 16 of the track material monitoring device mounted on the vehicle will be described with reference to the flowcharts in Figures 4 and 5. Of these, Figure 4 shows the procedure when a ground coil for indicating the start of the main line, O, is detected, and Figure 5 shows the procedure when a ground coil for indicating the start of the premises, □, is detected. When the control device 16 determines based on information acquired from the ground sensor by the power receiver 13 that it has detected a ground sensor circle for indicating the start of the main line, as shown in FIG. 4, it first determines whether the current time is during the transfer of image data of the recorded track material or within the transfer time period (e.g., 7:00 AM to 9:00 AM) (step S1).

[0032] If it is determined in step S1 that transfer is in progress or that it is within the transfer time period (YES), the process ends without starting to record track images. If it is determined in step S1 that transfer is not in progress or that it is not within the transfer time period (NO), the process proceeds to step S2, where it is determined whether or not track images have been recorded for the relevant block of the main line. If it is determined that track images have been recorded (YES), the process ends without starting to record track images.

[0033] Furthermore, if it is determined in step S2 above that track images for the block on the main line have not yet been recorded (NO), the process proceeds to step S3, where it is determined whether it is nighttime (for example, after 7 p.m.). If it is determined in step S3 that it is not nighttime (NO), the process ends without starting to record track images. If it is determined in step S3 that it is nighttime (YES), the process starts to record track images for the main line.

[0034] When the recording of track images is started, first, the image capturing device 11 starts to capture the captured images, and the recorded distance information is read from the reference table using the detected ground coil identification code (ground coil ID) (step S4). Next, the vehicle's travel distance is calculated based on the signal from the speed generator 15 (step S5), and it is determined whether the travel distance has reached the recorded distance (step S6). If it is determined that the travel distance has not reached the recorded distance (NO), the process returns to step S5. If it is determined in step S6 that the travel distance has reached the recorded distance (YES), the process proceeds to step S7, and tournament logic processing is performed on the acquired images.

[0035] Then, it is determined whether the image acquired this time is superior to the image of the same block that has already been stored, that is, which image is clearer (step S8). If it is determined in step S8 above that the image acquired this time is clearer (superior) than the image of the same block already stored, the process proceeds to step S9, where the image acquired this time is overwritten in the data storage area of ​​the block and recording is terminated. If it is determined in step S8 above that the image acquired this time is less clear (inferior) than the image of the same block already stored, the process proceeds to step S10, where the image acquired this time is discarded and recording is terminated.

[0036] When the control device 16 determines that it has detected a ground sensor □ for initiating a premises start instruction based on information obtained from the ground sensor by the receiver 13, as shown in Figure 5, it first determines whether the current time is during the transfer of image data of the recorded track material or during the transfer time period (step S11). If it is determined in step S11 that the data is being transferred or is in the transfer time zone (YES), the process ends without starting to record the orbital images. If it is determined in step S11 that the data is not being transferred or is not in the transfer time zone (NO), the process proceeds to step S12 to determine whether it is in the daytime zone or not. If it is determined that the data is not in the daytime zone (NO), the process ends without starting to record the orbital images.

[0037] Also, if it is determined in step S12 that it is daytime (YES), the process proceeds to step S13, where it is determined whether or not the recording of track images for the related main line block has been completed. If it is determined in step S13 that the recording of track images for the related block has not been completed (NO), the recording of track images within the station premises is terminated without starting. If it is determined in step S13 that the recording of track images for the related block of the main line has been completed (YES), the recording of track images within the station premises is started. Here, the "relevant main line block" in step S13 refers to, for example, in Figure 3, if the range BL1 at area boundary station ST2 where a vehicle traveling in the direction of arrow D detects the ground sensor □ at the entrance to the station for indicating the start of recording within the station and attempts to start recording images is defined as block 1, then the ranges indicated by BL2 and BL3 correspond to the relevant blocks 2 and 3.

[0038] In step S13, if it is determined that track images have been recorded for the related blocks (YES), recording of track images within the station premises is started, and if it is determined that track images for the related blocks have not been recorded (NO), recording of track images within the station premises is not started. By doing so, it is possible to start recording track images of the related blocks on the main line when the train passes the station and detects the ground coil ○ indicating the start of the main line at the exit of the station premises. As described above, the imaging device 11 used in this embodiment has a standby time. Therefore, if recording of images within the station was started without providing step S13, it would be too late to stop recording at the station exit and start recording of track images on the main line. However, by providing step S13, it is possible to avoid a situation in which it is not possible to record track images of the main line.

[0039] After step S13, when the recording of the track image is started, the image capturing device 11 starts to capture the image and reads the recorded distance from the reference table using the detected ground sensor identification code (ground sensor ID) (step S14). Next, the travel distance of the vehicle is calculated based on the signal from the speed generator 15 (step S15), and it is determined whether the travel distance exceeds a preset specified distance (step S16). If it is determined that the travel distance does not exceed the specified distance (NO), the process proceeds to step S17, where it is determined whether a new track number recognition ground coil △ has been detected. If it is determined that a new track number recognition ground coil △ has not been detected (NO), the process returns to step S15. If it is determined in step S17 that a new track number recognition ground coil △ has been detected (YES), the process proceeds to step S18, where the ID (identification code) of the track number recognition ground coil is recorded, and the process proceeds to step S19.

[0040] In step S19, the station layout information in the storage device 14 is referenced to determine whether or not there is an in-station route that matches the record of the track number recognition ground coil. If it is determined that there is no in-station route that matches the record (NO), the process returns to step S15. If it is determined that there is an in-station route that matches the record (YES) in step S19, the process proceeds to step S20 and the captured track image data is stored in the storage device 14. On the other hand, if it is determined in step S16 that the specified distance has been exceeded (YES), the process proceeds to step S21, where the track image data captured this time is discarded. If the train reverses its running direction at a station where turnaround operation is performed, the train will travel back and forth on the same rail, making the position of the captured track image unclear. However, according to the above procedure, such track image data is discarded, making it possible to avoid erroneous judgments based on the recorded images.

[0041] Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-mentioned embodiments and can be modified as appropriate. For example, in the above embodiment, a track material monitoring system equipped with five types of ground coils has been described, but it is sufficient to have at least a ground coil for main line start indication, a ground coil for yard start indication, and a ground coil for track number recognition or yard track number, and a system in which other ground coils are omitted is also possible.

[0042] In addition, in the above embodiment, in addition to the imaging device 11, a laser displacement sensor 12 is installed as an inspection device for track materials, but the laser displacement sensor 12 does not have to be installed, and in addition to the image data captured by the imaging device 11, the data measured by the laser displacement sensor 12 may also be temporarily stored in the storage device 14 and then transferred to the NAS 17. Furthermore, in the above embodiment, because better images can be obtained under more stable conditions at night, the main line mode, in which the more important track materials on the main line are photographed and measured, is set to nighttime, and the station premises mode, in which the less important track materials inside the station premises are photographed and measured, is set to daytime. However, for example, in a line where the line distance is short and it takes less time to photograph and measure the track materials on the main line, it is also possible to divide the nighttime running time into a first time slot and a second time slot at a specified ratio, and assign the main line mode and the station premises mode to the first time slot and the second time slot, respectively, and set both to photograph and measure the track materials at night. [Explanation of symbols]

[0043] 10 Track material monitoring device 11 Imaging device 12 Laser displacement sensor 13 Power receiver 14 Storage device 15 Speed ​​generator (rotation detection means) 16 Control device 17 NAS (Storage device) 18 Wireless communication devices

Claims

1. A track material monitoring device having an inspection means mounted on a vehicle for inspecting the vicinity of a rail, a storage means for storing data acquired by the inspection means, a data transfer means for transferring data stored in the storage means, and a control means, and a track material monitoring system including a plurality of ground coils installed along a track on which the vehicle runs and each storing at least its own identification code, the plurality of ground coils include a first ground coil installed at an exit of a station premises of a main line, a second ground coil installed at an entrance of the station premises of the main line, and a third ground coil installed on a side track other than the main line in the station premises; The control means When the first ground coil is detected, the inspection means starts acquiring data on the main line; When the second ground coil is detected, the inspection means starts acquiring data on the main line or the siding in the station premises; when the second ground coil and the third ground coil are detected in order, the data acquired by the inspection means is stored in the storage means as side track data in response to the establishment of a first condition; A track material monitoring system characterized in that, if the third ground coil is not detected within a predetermined distance after the second ground coil is detected, the data acquired by the inspection means is stored in the memory means as data for the main line within the station premises when a second condition is met.

2. a time period for acquiring data by the inspection means is set in advance, and the time period is divided into a first time period and a second time period; The track material monitoring system described in claim 1, characterized in that the first condition is the first time period other than the time when the acquired data is transferred by the data transfer means, and the second condition is the second time period other than the time when the acquired data is transferred by the data transfer means.

3. the inspection means is an imaging means, The track material monitoring system described in claim 1, characterized in that the first condition is a daytime period other than the time when the acquired data is transferred by the data transfer means, and the second condition is a nighttime period other than the time when the acquired data is transferred by the data transfer means.

4. The track material monitoring system according to claim 2 or 3, characterized in that the control means does not start acquiring data by the inspection means when data of the main line in the relevant range has not been acquired, even if the first condition is satisfied.

5. The track material monitoring device includes a rotation detection means for detecting the number of rotations of a wheel or an axle of a vehicle, The storage means stores data indicating a relationship between the first or second ground coil and a recording distance, The control means a function of calculating a travel distance of the vehicle based on the number of rotations detected by the rotation detection means; A track material monitoring system as described in any one of claims 1 to 4, characterized in that the inspection means starts acquiring data of the main line or siding upon detection of the first ground coil or the second ground coil, reads out a recorded distance corresponding to the detected first ground coil or the second ground coil from the storage means, and terminates the acquisition of data by the inspection means when the vehicle has moved the read-out recorded distance.

6. In a station premises where a plurality of sidings are provided in parallel with a main line, at least one third ground coil is provided for each siding, The track material monitoring system according to any one of claims 1 to 5, characterized in that the control means determines the route traveled by the vehicle based on the detection order of the second ground coil and the third ground coil, and stores the data acquired by the inspection means for each route in the memory means if the route matches a predetermined route.

Images