JP7334342B2 - Deterioration diagnosis device and deterioration diagnosis method - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a deterioration diagnosis device, an on-board device, a deterioration diagnosis system, and a deterioration diagnosis method for diagnosing deterioration of equipment used for train operation.

Conventionally, trains equipped with ATC (Automatic Train Control) on-board equipment receive ATC signals flowing on the rails, and control the trains to run at the speed indicated by the ATC signals, according to the distance from the preceding train, etc. It is carried out. Such a technique is disclosed in Patent Document 1.

Japanese Unexamined Patent Application Publication No. 2014-11848

However, according to the above-described conventional technology, a train equipped with an ATC on-board device malfunctions due to deterioration of equipment such as a power receiver for the ATC signal mounted on the train and a ground device on the ground side that transmits the ATC signal. If you do, you will not be able to receive the ATC signal. A train that cannot receive ATC signals cannot control its speed according to the distance from the preceding train, so there is a problem that the train stops running.

The present disclosure has been made in view of the above, and an object of the present disclosure is to obtain a deterioration diagnosis device capable of detecting a sign that a train will not be able to receive signals used for train operation.

In order to solve the above-described problems and achieve the object, the deterioration diagnosis device of the present disclosure uses the signal received from the structure installed on the ground to receive the signal in the train used for controlling the operation of the train. When the measured reception level is obtained, and the reception level and the judgment threshold are used, depending on whether the period during which the reception level is below the judgment threshold continues for a specified period that varies according to the speed of the train, It is characterized by comprising a judgment unit for detecting a sign of deterioration of ground equipment or on-board equipment of a train, and a storage unit for storing a judgment threshold value.

Advantageous Effects of Invention According to the present disclosure, the degradation diagnosis device has the effect of being able to detect a sign that a train will be unable to receive signals used for train operation.

1 is a diagram showing a configuration example of a degradation diagnosis system according to Embodiment 1. FIG. FIG. 4 is a diagram showing transition of change in reception level when on-board equipment of a train is in a state showing signs of deterioration in the deterioration diagnosis system according to Embodiment 1; FIG. 10 is a diagram showing changes in reception level when ground equipment shows signs of deterioration in the deterioration diagnosis system according to Embodiment 1; Flowchart showing the operation of the on-board device according to Embodiment 1 4 is a flow chart showing the operation of the deterioration diagnosis device according to the first embodiment; FIG. 4 is a diagram showing an image of determination processing in the determination unit of the deterioration diagnostic apparatus according to Embodiment 1; FIG. 4 is a diagram showing an example of a reception level when the deterioration diagnosis device according to Embodiment 1 detects a sign of deterioration of ground equipment; FIG. 4 is a diagram showing an example of a reception level when the deterioration diagnosis device according to Embodiment 1 detects a sign of deterioration of on-board equipment of a train; FIG. 4 is a diagram showing an example of a case where a processing circuit included in the deterioration diagnostic apparatus according to Embodiment 1 is configured by a processor and a memory; FIG. 4 is a diagram showing an example of a case where a processing circuit included in the degradation diagnostic apparatus according to Embodiment 1 is configured with dedicated hardware; FIG. 10 is a diagram showing an image of determination processing in the determination unit of the degradation diagnosis device according to Embodiment 2; FIG. 10 is a diagram showing an image of determination processing in the determination unit of the degradation diagnosis device according to Embodiment 3;

A deterioration diagnosis device, an on-board device, a deterioration diagnosis system, and a deterioration diagnosis method according to embodiments of the present disclosure will be described below in detail with reference to the drawings.

Embodiment 1.
FIG. 1 is a diagram showing a configuration example of a deterioration diagnostic system 100 according to Embodiment 1. As shown in FIG. The deterioration diagnosis system 100 includes an on-board device 10 , a data management device 20 and a deterioration diagnosis device 30 . The train 15 uses the signal received from the ground coil 40, the rail 50, etc. which were installed on the ground for control of operation of the train 15. FIG. The train 15 may consist of a plurality of cars, or may be a single train consisting of one car as shown in FIG. A train 15 includes an on-board device 10 , an on-board coil 13 , and a power receiver 14 . The on-board coil 13 receives a signal including information such as positional information of the ground coil 40 from the ground coil 40 installed on the ground. The onboard coil 13 may transmit and receive signals to and from the ground coil 40 . The power receiver 14 receives a signal containing information such as speed information indicating the speed limit for the train 15 from the rail 50 installed on the ground. In the train 15, the on-board device 10 may have the function of the ATC on-board device, or the on-board device 10 and the on-board ATC device (not shown) may be provided.

The on-board device 10 includes a measuring section 11 and a vehicle information management device 12 . The measurement unit 11 extracts information necessary for controlling the operation of the train 15 from the signal received by the on-board coil 13 from the ground coil 40 and the signal received by the power receiver 14 from the rail 50 in the train 15 . The information necessary for controlling the operation of the train 15 includes position information of the ground coil 40, speed information indicating the speed limit for the train 15, and the like, as described above. In the train 15, the measurement unit 11 measures the reception level when the onboard coil 13 receives the signal from the ground coil 40, and measures the reception level when the power receiver 14 receives the signal from the rail 50. Measure. The reception level is, for example, electric field strength, SNR (Signal to Noise Ratio), and the like. Hereinafter, a case where the reception level is the electric field intensity will be described as an example.

The vehicle information management device 12 manages the position of the train 15 . The vehicle information management device 12, for example, places the train 15 obtained from a tachometer (not shown) at a position indicated by the position information of the beacon 40, which is the information included in the signal received by the onboard coil 13 from the beacon 40. The position of the train 15 can be calculated by adding the traveling distance calculated from the speed information and the traveling time information. The vehicle information management device 12 may manage the position of the train 15 using GPS (Global Positioning System) or the like. The vehicle information management device 12 is, for example, a device such as a TIMS (Train Integrated Management System). The vehicle information management device 12 transmits the reception level measured by the measuring unit 11 and information on the position of the train 15 to the deterioration diagnosis device 30 via the data management device 20 by wireless communication.

The data management device 20 receives information on the reception level and the position of the train 15 transmitted from the vehicle information management device 12 of the on-board device 10 mounted on the train 15 by wireless communication. The data management device 20 outputs the received information on the reception level and the position of the train 15 to the deterioration diagnosis device 30 .

The deterioration diagnosis device 30 includes a determination section 31 and a storage section 32 . The determination unit 31 acquires a reception level measured when a signal is received on the train 15 from the on-board device 10 via the data management device 20 . The determination unit 31 detects a sign of deterioration of the ground equipment or the on-board equipment of the train 15 using the reception level and a determination threshold value for detecting a sign of deterioration of the ground equipment or the on-board equipment of the train 15. . Ground equipment is ground equipment such as ground coil 40 , rail 50 , and communication equipment (not shown) that generates signals transmitted from ground coil 40 and rail 50 . The on-board equipment of the train 15 includes the on-board coil 13, the power receiver 14, and the like. When the ground equipment or the on-board equipment of the train 15 deteriorates, the ground equipment or the on-board equipment of the train 15 becomes abnormal, and the train 15 becomes incapable of receiving signals. In the present embodiment, the determining unit 31 detects a state before deterioration of the ground equipment or on-board equipment of the train 15 as a sign of deterioration, even though the equipment has not yet deteriorated. Specifically, the determination unit 31 compares the reception level with the determination threshold. The determination unit 31 determines that a sign of deterioration of ground equipment or on-board equipment of the train 15 has been detected when the reception level is equal to or lower than the determination threshold. A detailed operation of the determination unit 31 will be described later.

The storage unit 32 stores determination thresholds. The storage unit 32 also stores a minimum operating level threshold for determining whether a signal is being transmitted from the ground coil 40 or the rail 50 . For example, the user who uses the deterioration diagnosis system 100 stores the determination threshold and the minimum operating level threshold in advance in the storage unit 32 . Note that the determination threshold may be changed as appropriate.

The ground coil 40 transmits a signal including position information indicating the position where the ground coil 40 is installed. The beacon 40 may transmit a signal including identification information that can identify the beacon 40 instead of the positional information. The rail 50 transmits a signal including speed information indicating the speed limit for the train 15 according to the distance from the preceding train running in front of the train 15 in the running direction. The ground coil 40 and the rail 50 are structures installed on the ground.

Next, the operation of the deterioration diagnosis device 30 in the deterioration diagnosis system 100 to detect signs of deterioration of ground equipment or on-board equipment of the train 15 will be described. Here, as an example, a case where the train 15 receives a signal from the rail 50 will be described. The same operation is performed when the train 15 receives a signal from the ground coil 40 .

Generally, the system for operating the train 15 divides the section in which the train 15 runs into a plurality of closed sections. The rail 50 of each closed section transmits a signal including speed information indicating the speed limit for the train 15, which is a speed corresponding to the distance from the preceding train traveling ahead in the running direction of the train 15. The rail 50 will transmit a signal including speed information in each block section in block section units. A signal transmitted from the rail 50 is output for each blocked section from the rail 50 on which the train 15 runs. In other words, the system for operating the train 15 is provided with facilities capable of transmitting different signals for each blocked section as wayside facilities. Therefore, as shown in FIGS. 2 and 3, the deterioration diagnosis device 30 determines whether the reception level has decreased in all blocked sections or whether the reception level has decreased in a specific blocked section. Signs of deterioration of on-board equipment can be detected.

FIG. 2 is a diagram showing changes in the reception level when the on-board equipment of the train 15 shows signs of deterioration in the deterioration diagnosis system 100 according to the first embodiment. 2(a) to 2(c), the horizontal axis indicates the running position of the train 15, and the vertical axis indicates the reception level of the signal in the train 15. In FIG. In a case where a plurality of trains 15 are operated, focus on the train 15 of a specific Z formation. As shown in FIG. 2(a), the Z train 15 has a good reception level at the start of service. In general, equipment deteriorates in performance due to aging. In the train 15 of the Z formation as well, it is expected that the reception performance of the power receiver 14 and the like deteriorates due to aging. As shown in FIG. 2(b), in the train 15 of the Z formation, after T1 years from the start of service, the reception level in all closed sections is lower than that at the start of service. As shown in FIG. 2(c), the reception level of the train 15 of the Z formation further declines in all the closed sections after T2 years from the start of service. Note that T2>T1.

In this way, when the reception level is lowered in a plurality of blocked sections, the deterioration diagnosis device 30 determines that the onboard equipment of the train 15 of the Z formation, such as the power receiver 14, indicates a sign of deterioration. be able to. Specifically, the determination unit 31 of the deterioration diagnosis device 30 detects deterioration of the on-board equipment of the train 15 of the Z train 15 when the reception level decreases in a plurality of blocked sections and the reception level becomes equal to or less than the determination threshold. It is determined that an omen has been detected.

FIG. 3 is a diagram showing changes in the reception level when ground facilities show signs of deterioration in the deterioration diagnosis system 100 according to the first embodiment. 3(a) to 3(c), the horizontal axis indicates the running position of the train 15, and the vertical axis indicates the reception level of the signal in the train 15. In FIG. In a case where a plurality of trains 15 are operated, attention is paid to the plurality of trains 15 from the train 15 of the A formation to the train 15 of the Z formation. As shown in FIG. 3(a), the train 15 composed of A to Z has a good reception level at the start of service. In general, equipment deteriorates in performance due to aging. In ground facilities as well, it is expected that the transmission performance of a communication device (not shown) that transmits signals from the rail 50 will deteriorate over time. As shown in FIG. 3(b), the train 15 of the A to Z formations has a lower reception level than that at the start of service in a specific closed section T1 years after the start of service. As shown in FIG. 3(c), the train 15 of the A to Z train set further lowers the reception level in a specific closed section after T2 years from the start of service. Note that T2>T1.

In this way, when the reception level is lowered in a specific block section in the trains 15 of the A to Z formations, the deterioration diagnosis device 30 is a sign of deterioration of the on-board equipment provided in all the trains 15 of the A to Z formations. is detected, and it is determined that there is a low possibility that the reception level will decrease only in a specific blocked section. The deterioration diagnosis device 30 can determine that ground equipment, such as a communication device, in a specific blocked section that transmits signals from the rail 50 toward the A to Z train set shows signs of deterioration. Specifically, the determination unit 31 of the deterioration diagnosis device 30 detects a sign of deterioration of ground equipment in a specific blocked section when the reception level decreases and becomes equal to or lower than the determination threshold in the specific blocked section. It is determined that

In addition, in FIGS. 2 and 3, the reception level is lowered in places, but this indicates the boundary of the blocked section. The rail 50 has areas where no signal flows at the boundaries of the closed sections. That is, the boundary of the closed section becomes a no-signal state. Thus, at the boundary of the closed section, the signal reception level is lowered in the train 15 even if the on-board equipment and wayside equipment show no signs of deterioration. Therefore, the deterioration diagnosis device 30 does not use the reception level measured by the train 15 while the train 15 is running on the boundary of the closed section to determine signs of deterioration of on-board equipment or wayside equipment.

First, the operation of the on-board device 10 included in the deterioration diagnosis system 100 will be described. FIG. 4 is a flow chart showing the operation of the on-board device 10 according to the first embodiment. In the on-board device 10, the measurement unit 11 measures the reception level when the power receiver 14 receives the signal transmitted from the rail 50 (step S11). The measuring unit 11 outputs information on the measured reception level to the vehicle information management device 12 . The vehicle information management device 12 transmits the reception level measured by the measurement unit 11 and information on the position of the train 15 to the deterioration diagnosis device 30 via the data management device 20 (step S12).

The on-board device 10 compares the reception level 60 with the minimum operating level threshold 61 . If the reception level 60 is equal to or lower than the minimum operating level threshold value 61 and continues for the specified first period (step S13: Yes), the on-vehicle device 10 instructs the operation of the emergency brake (step S14). The first period is set to be longer than the period during which the reception level 60 momentarily drops at the boundary of the closed section when the onboard equipment and ground equipment of the train 15 are in good condition with no sign of deterioration. If the reception level 60 is greater than the minimum operating level threshold 61, or if the reception level 60 has become equal to or less than the minimum operating level threshold 61 but has not continued for a specified first period (step S13: No), the on-board device 10 ends the operation. In the above description, the case where the on-board device 10 has the function of the ATC on-board device is described as an example. The ATC on-board device may perform the operations of steps S13 and S14. The on-board device 10 periodically and repeatedly performs the operation shown in FIG.

Next, the operation of the deterioration diagnosis device 30 included in the deterioration diagnosis system 100 will be described. FIG. 5 is a flow chart showing the operation of the deterioration diagnosis device 30 according to the first embodiment. In the deterioration diagnosis device 30, the determination unit 31 acquires information on the reception level and the position of the train 15 from the on-board device 10 via the data management device 20 (step S21). The determination unit 31 compares the reception level with the minimum operating level threshold value and the determination threshold value, as described below. FIG. 6 is a diagram showing an image of determination processing in the determination unit 31 of the deterioration diagnosis device 30 according to the first embodiment. In FIG. 6, the horizontal axis indicates the running position of the train 15 from O station to Δ station. 6, the vertical axis on the left indicates the magnitude of the reception level 60, and the vertical axis on the right indicates the speed V of the train 15. In FIG. In FIG. 6 , the vertical axis on the left side also indicates the magnitude of the minimum operation level threshold 61 and the determination threshold 62 . In FIG. 6, the magnitude of the reception level 60 is represented by a value converted into a current flowing through the rail 50, but it may be represented by a voltage value as in FIGS.

Since the signal does not flow on the rail 50 at the boundary of the closed section as described above, the determination unit 31 does not perform the determination at the boundary of the closed section. Here, the determination unit 31 may continuously compare the reception level 60 with the minimum operating level threshold value 61 and the determination threshold value 62. Alternatively, the determination unit 31 may compare the reception level 60 with the minimum operation level threshold value 61 and the determination threshold value 62. It may be done in a specified period. When the determination unit 31 continuously compares the reception level 60 with the minimum operating level threshold value 61 and the determination threshold value 62, the reception level 60 that momentarily drops at the boundary of the blocked section is not subject to determination. do. When the determination unit 31 compares the reception level 60 with the minimum operation level threshold value 61 and the determination threshold value 62 in a specified period from a specified timing, for example, from the timing when the train 15 runs in the center of each blocked section The reception level 60 measured during the specified period of time is used for determination. The defined period may vary depending on the speed V of the train 15 .

The determination unit 31 can recognize the temporal transition of fluctuations in the reception level 60 at the timing of acquiring information on the reception level 60 from the on-board device 10 via the data management device 20 . The determination unit 31 also obtains information on the speed V of the train 15 from the on-board device 10 via the data management device 20, and divides the range of the running position of the train 15 shown in FIG. , the period required for the train 15 to travel the distance to the travel position can be calculated. The determining unit 31 calculates the period required for the train 15 to travel a certain range of distances to the travel position shown in FIG. It is possible to recognize the transition of

Returning to the description of FIG. The determination unit 31 reads the determination threshold value 62 from the storage unit 32 and compares the reception level 60 and the determination threshold value 62 . If the reception level 60 is equal to or less than the determination threshold value 62 and has continued for the specified second period (step S22: Yes), the determination unit 31 determines whether the reception level 60 is equal to or less than the determination threshold value 62 in a specific blocked section. , or whether the reception level 60 is equal to or lower than the determination threshold 62 in a plurality of blocked sections. The second period is set to be longer than the period during which the reception level 60 momentarily drops at the boundary of the closed section when the onboard equipment and ground equipment of the train 15 are in good condition with no sign of deterioration. The second time period may vary depending on the speed V of train 15 .

If the reception level 60 is equal to or lower than the determination threshold 62 in a specific blocked section (step S23: Yes), the determination unit 31 indicates that a sign of deterioration of ground equipment has been detected in the system that operates the train 15. An alarm is output (step S24). As an alarm, the determination unit 31 displays, for example, on a display unit (not shown) provided in the deterioration diagnosis device 30 that a sign of deterioration of ground equipment has been detected. The determination unit 31 may use an LED (Light Emitting Diode), a speaker, or the like (not shown) provided in the deterioration diagnosis device 30 as an alarm to make the user aware that a sign of deterioration of ground equipment has been detected. The same applies when the determination unit 31 outputs an alarm in the following description. When the reception level 60 is equal to or lower than the determination threshold 62 in a plurality of blocked sections (step S23: No), the determination unit 31 detects a sign of deterioration of on-board equipment of the train 15 in the system that operates the train 15. An alarm indicating that it has been done is output (step S25). As a result, the user who confirmed the alarm can recognize that either the ground equipment or the on-board equipment of the train 15 is showing signs of deterioration, and can take measures such as inspecting, repairing, or replacing the equipment. can.

If the reception level 60 is greater than the determination threshold value 62, or if the reception level 60 becomes equal to or less than the determination threshold value 62 but does not continue for the specified second period (step S22: No), the determination unit 31 performs the operation. finish. The determination unit 31 repeatedly performs the operation shown in FIG. 5 continuously or during a specified period from a specified timing.

FIG. 7 is a diagram showing an example of the reception level 60 when the deterioration diagnosis device 30 according to Embodiment 1 detects a sign of deterioration of ground equipment. When the reception level 60 in the specific blocked section is equal to or lower than the determination threshold 62 as shown in FIG. 7, the determination unit 31 of the deterioration diagnosis device 30 detects a sign of deterioration of the ground equipment in the specific blocked section. judge. FIG. 8 is a diagram showing an example of the reception level 60 when the deterioration diagnosis device 30 according to Embodiment 1 detects a sign of deterioration of on-board equipment of the train 15. As shown in FIG. As shown in FIG. 8, the determination unit 31 of the deterioration diagnostic device 30 detects a sign of deterioration of the on-board equipment of the train 15 when the reception level 60 is equal to or lower than the determination threshold value 62 in a plurality of blocked sections, that is, as a whole. is detected.

In the present embodiment, the case where the deterioration diagnosis device 30 is installed outside the train 15 on the ground side has been described, but the present invention is not limited to this. In the deterioration diagnosis system 100 , the deterioration diagnosis device 30 may be mounted on the train 15 . In this case, the deterioration diagnosis system 100 may eliminate the data management device 20 and allow the vehicle information management device 12 of the on-board device 10 and the deterioration diagnosis device 30 to communicate directly. Even when mounted on the train 15, the deterioration diagnosis device 30 can detect signs of deterioration of on-board equipment of the train 15 with the same accuracy as when installed on the ground. In addition, even when installed on the train 15, the deterioration diagnosis device 30 is less accurate than when installed on the ground, but by performing the determination multiple times, it detects signs of deterioration of the ground equipment. can do.

Next, the hardware configuration of the deterioration diagnosis device 30 will be explained. In the deterioration diagnosis device 30, the storage unit 32 is a memory. The determination unit 31 is implemented by a processing circuit. The processing circuitry may be a processor and memory executing programs stored in the memory, or may be dedicated hardware.

FIG. 9 is a diagram showing an example of a case in which a processing circuit included in the deterioration diagnosis device 30 according to Embodiment 1 is configured with a processor and a memory. When the processing circuit is composed of the processor 91 and the memory 92, each function of the processing circuit of the deterioration diagnosis device 30 is implemented by software, firmware, or a combination of software and firmware. Software or firmware is written as a program and stored in memory 92 . In the processing circuit, each function is realized by the processor 91 reading and executing the program stored in the memory 92 . That is, the processing circuit includes a memory 92 for storing a program that results in the processing of the degradation diagnosis device 30 being executed. It can also be said that these programs cause a computer to execute the procedures and methods of the deterioration diagnosis device 30 .

Here, the processor 91 may be a CPU (Central Processing Unit), a processing device, an arithmetic device, a microprocessor, a microcomputer, or a DSP (Digital Signal Processor). The memory 92 includes non-volatile or volatile memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (registered trademark) (Electrically EPROM). semiconductor memories, magnetic discs, flexible discs, optical discs, compact discs, mini discs, or DVDs (Digital Versatile Discs).

FIG. 10 is a diagram showing an example in which the processing circuit included in the degradation diagnosis device 30 according to Embodiment 1 is configured with dedicated hardware. When the processing circuit is composed of dedicated hardware, the processing circuit 93 shown in FIG. 10 is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), An FPGA (Field Programmable Gate Array) or a combination thereof is applicable. Each function of the deterioration diagnosis device 30 may be realized by the processing circuit 93 for each function, or each function may be collectively realized by the processing circuit 93 .

It should be noted that each function of the deterioration diagnosis device 30 may be partly realized by dedicated hardware and partly realized by software or firmware. Thus, the processing circuitry may implement each of the functions described above through dedicated hardware, software, firmware, or a combination thereof.

The hardware configuration of the on-board device 10 is also the same. In the on-board device 10, the measurement unit 11 is an interface capable of receiving signals. The vehicle information management device 12 is implemented by a processing circuit. The processing circuitry may be a processor and memory executing programs stored in the memory, or may be dedicated hardware.

As described above, according to the present embodiment, in the deterioration diagnosis system 100, the deterioration diagnosis device 30 receives a signal from the on-board device 10 via the data management device 20 on the train 15, and measures the Information on the received reception level 60 is acquired, and using the reception level 60 and the determination threshold 62, signs of deterioration of ground equipment or on-board equipment of the train 15 are detected. Specifically, when the reception level 60 is equal to or lower than the determination threshold 62 in a plurality of blocked sections, the deterioration diagnosis device 30 determines that a sign of deterioration of on-board equipment has been detected, and When 60 becomes equal to or less than the determination threshold 62, it is determined that a sign of deterioration of wayside facilities in a specific blocked section has been detected. The deterioration diagnosis device 30 can detect signs that the train 15 will not be able to receive the signals used to operate the train 15 . As a result, the user can recognize that either the ground equipment or the on-board equipment of the train 15 is showing signs of deterioration, and can take measures such as inspecting, repairing, or replacing the equipment. As a result, the system for operating the train 15 is in such a situation that ground equipment or on-board equipment of the train 15 deteriorates during operation of the train 15 and the train 15 becomes unable to receive signals, and the operation of the train 15 stops. can be avoided.

Embodiment 2.
In Embodiment 1, the determination unit 31 of the deterioration diagnosis device 30 considers the no-signal state at the boundary of the blocked section when the period during which the reception level 60 is equal to or lower than the minimum operating level threshold value 61 is equal to or shorter than the first period. Therefore, it was assumed that the level did not fall below the minimum operating level threshold 61. In the second embodiment, the determination unit 31 of the deterioration diagnosis device 30 outputs an alarm when the period during which the reception level 60 is equal to or less than the minimum operating level threshold value 61 is longer than or equal to a third period shorter than the first period.

In Embodiment 2, the configuration of deterioration diagnosis system 100 is the same as the configuration in Embodiment 1 shown in FIG. FIG. 11 is a diagram showing an image of determination processing in the determination unit 31 of the deterioration diagnosis device 30 according to the second embodiment. In FIG. 11, the horizontal axis indicates time and the vertical axis indicates reception level 60. In FIG. As shown in FIG. 11, the determination unit 31 of the deterioration diagnosis device 30 determines that even if the period during which the reception level 60 is equal to or less than the minimum operating level threshold value 61 is shorter than the first period 63, too long, output an alarm. The third period 64 is, for example, a period in which the ground equipment and on-board equipment of the train 15 are both in the state at the start of service and the reception level 60 decreases at the boundary of the closed section. do.

If the period during which the reception level 60 is equal to or lower than the minimum operating level threshold value 61 is longer than the third period 64, the determination unit 31 detects a sign of deterioration of either ground equipment or on-board equipment of the train 15. Output an alarm by estimating that there is a possibility of Further, when the period during which the reception level 60 is equal to or less than the minimum operating level threshold value 61 for a plurality of trains 15 is longer than the third period 64, the determination unit 31 may detect a sign of deterioration of ground equipment. An alarm can be output by estimating that there is That is, the determination unit 31 compares the reception level 60 with the minimum operating level threshold value 61, and determines that the reception level 60 is equal to or greater than the third period 64, which is a defined period during which the reception level 60 is equal to or lower than the minimum operating level threshold value 61. In this case, an alarm is output indicating that the period during which the reception level 60 is equal to or less than the minimum operating level threshold value 61 has become equal to or greater than a third period 64, which is a prescribed period. As a result, the user who has confirmed the alarm can recognize that either the ground equipment or the on-board equipment of the train 15 may show signs of deterioration, and can perform maintenance or the like.

The determining unit 31 determines that when the period during which the reception level 60 is equal to or less than the minimum operation level threshold value 61 for the plurality of trains 15 is longer than or equal to a third period 64, which is a specified period, the wayside equipment indicates a sign of deterioration. An alarm indicating that there is a possibility may be output.

As described above, according to the present embodiment, in the deterioration diagnosis system 100, the deterioration diagnosis device 30 compares the reception level 60 with the minimum operating level threshold 61, and determines that the reception level 60 is equal to or lower than the minimum operating level threshold 61. An alarm is output when the period of time becomes longer than or equal to the third period 64, which is the prescribed period. As a result, the deterioration diagnosis device 30 can indicate to the user in advance the ground equipment or on-board equipment of the train 15 that may detect signs of deterioration.

Note that the determination unit 31 of the deterioration diagnosis device 30 outputs an alarm when the period in which the reception level 60 is equal to or less than the determination threshold value 62 is shorter than the second period but longer than the specified fourth period. good too. Specifically, in the operation of the flowchart shown in FIG. 5, if step S22: No, the determination unit 31 further determines whether the reception level 60 is equal to or lower than the determination threshold value 62 and continues for a specified fourth period. to confirm. If the reception level 60 is equal to or lower than the determination threshold value 62 and continues for the specified fourth period, the determination unit 31 performs the same operation as the operation from step S23 to step S25. As a result, the determining unit 31 can indicate to the user, in advance, ground equipment or on-board equipment of the train 15 that may detect signs of deterioration.

Embodiment 3.
In Embodiment 1, the determination unit 31 of the deterioration diagnosis device 30 compares the reception level 60 with one determination threshold value 62 . In Embodiment 3, the determination unit 31 of the deterioration diagnosis device 30 compares the reception level 60 with a plurality of determination thresholds.

In Embodiment 3, the configuration of deterioration diagnosis system 100 is the same as that of Embodiment 1 shown in FIG. FIG. 12 is a diagram showing an image of determination processing in the determination unit 31 of the deterioration diagnosis device 30 according to the third embodiment. FIG. 12 is obtained by replacing the determination threshold value 62 with the first determination threshold value 65 and adding the second determination threshold value 66 to the images of FIGS. Even if the reception level 60 is greater than the first determination threshold value 65, the determination unit 31 of the deterioration diagnosis device 30 determines that ground equipment in a specific blocked section is degraded when the reception level 60 is equal to or less than the second determination threshold value 66. Output an alarm indicating a trend. As a result, the user who has confirmed the alarm can perform maintenance on the ground equipment of a specific blocked section more intensively than on the ground equipment of other blocked sections.

In addition, in the example of FIG. 12, the case where there are two determination thresholds has been described, but the present invention is not limited to this. There may be three or more determination thresholds. Thus, in the deterioration diagnosis device 30, the storage unit 32 stores a plurality of determination thresholds as determination thresholds. The determination unit 31 compares the reception level 60 with a plurality of determination thresholds and outputs an alarm based on each determination threshold.

Further, in the present embodiment, an example has been described in which it is indicated that ground equipment in a specific closed section tends to deteriorate, but the present invention is not limited to this. The determination unit 31 of the deterioration diagnosis device 30 outputs an alarm assuming that the on-board equipment of the train 15 tends to deteriorate when the reception level 60 becomes equal to or less than the second determination threshold value 66 in a plurality of blocked sections. be able to.

As described above, according to the present embodiment, in degradation diagnostic system 100, degradation diagnostic device 30 compares reception level 60 with a plurality of determination thresholds, and outputs an alarm based on each determination threshold. did. As a result, the deterioration diagnosis device 30 can output an alarm according to the current state of the reception level 60 to the user.

The configurations shown in the above embodiments are only examples, and can be combined with other known techniques, or can be combined with other embodiments, without departing from the scope of the invention. It is also possible to omit or change part of the configuration.

REFERENCE SIGNS LIST 10 on-board device, 11 measurement unit, 12 vehicle information management device, 13 on-board device, 14 power receiver, 15 train, 20 data management device, 30 deterioration diagnosis device, 31 determination unit, 32 storage unit, 40 beacon, 50 Rail, 60 reception level, 61 minimum operating level threshold, 62 decision threshold, 63 first period, 64 third period, 65 first decision threshold, 66 second decision threshold, 100 deterioration diagnosis system.

Claims (14)

A signal received from a structure installed on the ground is used to obtain a reception level measured when the signal is received by the train used for train operation control, and the reception level and a determination threshold are used. and detects a sign of deterioration of ground equipment or on-board equipment of the train depending on whether the period during which the reception level is equal to or less than the determination threshold continues for a specified period that varies according to the speed of the train. a determination unit;
a storage unit that stores the determination threshold;
A deterioration diagnostic device comprising: The determination unit determines that a sign of deterioration of the on-board equipment has been detected when the reception level is equal to or lower than the determination threshold in a plurality of blocked sections.
2. The deterioration diagnosis device according to claim 1, characterized in that: The determination unit determines that a sign of deterioration of ground equipment in the specific blocked section is detected when the reception level is equal to or lower than the determination threshold in the specific blocked section.
2. The deterioration diagnosis device according to claim 1, characterized in that: The determination unit continuously compares the reception level and a determination threshold,
4. The deterioration diagnosis device according to any one of claims 1 to 3, characterized in that: The determination unit compares the reception level with a determination threshold within a specified period from a specified timing.
4. The deterioration diagnosis device according to any one of claims 1 to 3, characterized in that: The storage unit stores a minimum operating level threshold value for determining whether a signal is being transmitted from the structure,
The determination unit compares the reception level with the minimum operating level threshold, and if the period during which the reception level is equal to or lower than the minimum operating level threshold is equal to or longer than a prescribed period, the reception level is reduced to the minimum operating level threshold. output an alarm indicating that the period of time below the level threshold has exceeded the specified period;
6. The deterioration diagnosis device according to any one of claims 1 to 5, characterized in that: The storage unit stores a plurality of determination thresholds as the determination thresholds,
The determination unit compares the reception level with the plurality of determination thresholds, and outputs an alarm based on each determination threshold.
7. The deterioration diagnosis device according to any one of claims 1 to 6, characterized in that: A first step in which the determination unit obtains a reception level measured when the signal received from a structure installed on the ground is received by the train used for controlling the operation of the train;
The determination unit uses the reception level and the determination threshold to determine whether the period in which the reception level is equal to or less than the determination threshold continues for a specified period that varies according to the speed of the train. or a second step of detecting a sign of deterioration of on-board equipment of the train;
A deterioration diagnosis method, comprising: In the second step, the determination unit determines that a sign of deterioration of the on-board equipment has been detected when the reception level is equal to or lower than the determination threshold in a plurality of blocked sections.
The deterioration diagnosis method according to claim 8 , characterized in that: In the second step, the determination unit determines that a sign of deterioration of ground equipment in the specific blocked section is detected when the reception level is equal to or lower than the determination threshold in the specific blocked section.
The deterioration diagnosis method according to claim 8 , characterized in that: In the second step, the determination unit continuously compares the reception level and a determination threshold,
The deterioration diagnosis method according to any one of claims 8 to 10 , characterized in that: In the second step, the determination unit compares the reception level with a determination threshold within a specified period from a specified timing.
The deterioration diagnosis method according to any one of claims 8 to 10 , characterized in that: In the second step, the determination unit compares the reception level with a minimum operating level threshold for determining whether or not a signal is being transmitted from the structure, and determines whether the reception level is the minimum operating level. outputting an alarm indicating that the period during which the reception level is equal to or less than the minimum operating level threshold is equal to or longer than the specified period, when the period during which the signal is equal to or lower than the threshold is longer than or equal to the specified period;
The deterioration diagnosis method according to any one of claims 8 to 12 , characterized in that: In the second step, the determination unit compares the reception level with a plurality of determination thresholds, and outputs an alarm based on each determination threshold.
14. The deterioration diagnosis method according to any one of claims 8 to 13 , characterized in that:

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