JP6882909B2 - Diagnostic system and diagnostic method - Google Patents

Description

The present invention relates to a diagnostic system for non-contact communication of a traveling body such as a train, and a diagnostic method.

In the train control system as a traveling body, in order to control the traveling of the train, the position of the traveling train, the speed limit information of the traveling section, and the like are acquired by the train from the ground side. Specifically, the train control device by realizing non-contact communication using magnetic coupling between the on-board element installed under the floor of the car body and the ground element installed on the track on which the train travels. Is receiving control information. That is, when the ground element is activated by the power wave output by the on-board element, the ground element wirelessly transmits the recorded information such as the position and the speed limit to the on-board element as an information wave in a non-contact manner.

In order to be able to acquire control information such as the position and speed limit while the train is running, ground elements are installed not only between stations but also over the entire running section including the off-line section. Therefore, there is a problem that a lot of labor and cost are spent on maintenance of the ground element, confirmation of its soundness, and replacement of the ground element.

Therefore, preventive maintenance has been proposed in which the ground element is maintained by using a commercial vehicle. For example, in Patent Document 1, the level of the information wave received from the ground element by the on-board element is recorded at a predetermined timing. However, an invention is disclosed in which a decrease in the information wave level from a ground element is detected by counting the number of times the reception level reaches a predetermined value.

Then, in Patent Document 2, as a means for measuring the communication quality between the on-board element and the ground element provided on the train, the number of wireless packets received by the on-board element from the ground element and the speed of the train are used. The communication distance between the on-board child and the ground element is calculated, and this is compared with a judgment value consisting of fixed values determined by the communication method, antenna gain, transmission output, etc. to judge the deterioration of the communication distance. The invention to be used is disclosed.

Japanese Unexamined Patent Publication No. 2013-153611 Japanese Unexamined Patent Publication No. 2012-16989

However, the conventional system has a problem that it is not sufficient for accurately diagnosing the non-contact communication between the on-board element and the ground element. Therefore, the present invention diagnoses the non-contact communication performed between the vehicle-mounted element and the ground element, and determines the vehicle-mounted element and / or the ground element whose communication quality is deteriorated. It is an object of the present invention to provide a diagnostic system and a diagnostic method capable of accurately realizing preventive maintenance of the non-contact communication function of a traveling body.

In order to achieve the above object, the present invention is a diagnostic system for diagnosing non-contact communication of each of a plurality of traveling bodies, and the plurality of traveling bodies each travel along a traveling path and along the traveling path. , A plurality of ground elements are arranged in order, and a vehicle-mounted element capable of non-contact communication with each of the plurality of ground elements in a process in which the plurality of traveling bodies travel along the traveling path is the plurality of traveling bodies. Installed on each body, the diagnostic system includes a management device that manages the communication quality between the vehicle-mounted child and the plurality of ground-based children, and the management device includes the vehicle-mounted child and the plurality of ground-based children. From the execution result of the non-contact communication with the child, the management parameter for diagnosing the non-contact communication is calculated for each of the plurality of ground children, and each on-board child installed in each of the plurality of traveling bodies is calculated. The control parameters are recorded in. Furthermore, the present invention provides a method for this diagnosis.

The present invention diagnoses the non-contact communication between the on-board element and the ground element to determine the on-vehicle element and / or the ground element whose communication quality is deteriorated. It is possible to accurately realize preventive maintenance of the non-contact communication function of the traveling body.

It is a block diagram which shows the whole structure of the train control system by this embodiment. It is a schematic perspective view provided to explain the relationship between the upper limit speed of a train and the minimum communicable distance in this train control system. It is a conceptual diagram which shows the analysis method of the deteriorated part of the on-board child and the ground element. It is a conceptual diagram which shows the transition by a short time of a communicable distance. It is a conceptual diagram which shows the transition of a communicable distance with a long time. It is a flowchart which shows the processing procedure of the on-board child determination processing. It is a flowchart which shows the processing procedure of the ground element determination processing. It is a block diagram which shows the whole structure of the train control system by another embodiment. It is a block diagram which shows the whole structure of the train control system by another embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a functional block diagram of a train control system 1 including a train 2 and a ground facility 3 that integrally manages a plurality of trains 2. The train control system 1 realizes a diagnostic system for diagnosing non-contact communication of the train 2 during commercial operation. The train 2 includes a control system that comprehensively controls the train 2, and the train control system 1 realizes a management device for a diagnostic system.

The train 2 may be a formation of a plurality of vehicles traveling on a track as a running path. The train 2 is provided with an on-board element 5 under the floor, and receives information waves from the ground elements 4 laid in order along the track. The track is divided into a plurality of sections, and a ground element 4 may be laid for each section. When the train 2 sequentially passes through the ground element 4 during commercial operation, non-contact communication using magnetic coupling is performed between the on-board element 5 and the ground element 4. In non-contact communication, the ground element 4 is activated by the electric power wave output by the on-board element 5, and related information such as position information and speed limit information held in the ground element 4 is used as an information wave from the ground element 4. It is established by wirelessly transmitting to the on-board child 5.

The control system of the train 2 includes a train speed measuring device 9 for measuring the traveling speed of the train 2, an information wave receiver 6 for receiving information waves from the on-board child 5, a sub-diagnosis system 100, and a sub-diagnosis system 100. It includes a determination result recording device 11 for recording the determination result, and a transmitter 12 for transmitting the recorded information to the ground equipment 3. The train speed measuring device 9 measures a pulse signal accompanying the rotation of the wheel 9A rolling on the track.

The sub-diagnosis system 100 is roughly divided into a first processing module 7 for calculating management parameters for diagnosis, a second processing module 8 for calculating criteria for evaluating management parameters, a ground element 4, and a vehicle. It is provided with a deterioration determination module 10 for determining deterioration, deterioration, change, etc. of the communication quality of the upper child 5. The term module indicates that the function is realized by software of a computer including a memory, a CPU, and the like.

The first processing module 7 calculates management parameters based on the information wave decoded and demodulated by the information wave receiver 6 and the train speed measured by the train speed measuring device 9. The first processing module 7 calculates the contact length as the distance in the orbit direction in which the on-board element 5 can communicate with the ground element 4 as an example of the management parameter. The first processing module 7 includes a data length extraction module 13, a reception time calculation module 15, and a communicable distance calculation module 16 for calculating the communicable distance (contact length).

The data length extraction module 13 extracts the data length from the demodulated data of the information wave receiver 6. The reception time calculation module 15 divides this data length by the transmission speed 14 of the information wave to calculate the reception time of the information wave and output it. The reception time calculation module 15 may access the memory to acquire the transmission speed 14 recorded in advance. The communicable distance calculation module 16 calculates the communicable distance by multiplying the train speed received from the train speed measuring device 9 by the reception time received from the reception time calculation module 15.

The second processing module 8 includes an upper limit speed extraction module 17 and a determination value calculation module 19 in order to calculate a reference for evaluating the management parameter. The upper limit speed extraction module 17 extracts the upper limit speed information of the train 2 in the traveling section from the demodulated data of the information wave receiver 6. The determination value calculation module 19 multiplies the minimum reception time 18, which is recorded in advance as at least the time required for normally receiving the information wave from the ground element 4, by the upper limit speed acquired from the upper limit speed extraction module 17. The minimum contact length (minimum receivable distance) required for receiving information waves when the train 2 travels in the traveling section at the upper limit speed is calculated, and a predetermined amount of margin is added to this to calculate the communicable distance. The evaluation standard (judgment value) for evaluating the calculated value of the calculation module 16 is output. The determination value calculation module 19 can access the memory and acquire the minimum reception time 18.

The deterioration determination module 10 compares the communicable distance received from the communicable distance calculation module 16 with the determination value received from the determination value calculation module 19, and when the former is smaller than the latter, the on-board element 5 and the ground element It is determined that the quality of non-contact communication with 4 has deteriorated. It should be noted that this deterioration is caused by a decrease in the communication function of the ground element 4, a decrease in the communication function of the on-board element 5, or both.

The deterioration determination module 10 records the determination result in the determination result recording device 11 in association with the identification number for identifying the ground element 4 and the identification number of the on-board element 5. The transmitter 12 wirelessly transmits the recorded information of the determination result recording device 11 to the ground equipment 3.

The ground equipment 3 includes a receiver 20, a data storage device 21, a deterioration location analysis module 22, and an analysis result output module 23. The receiver 20 receives the determination result from the transmitter 12 for each of the plurality of trains 2. The data storage device 21 may be a server that stores the data received by the receiver 20. The deterioration location analysis module 22 analyzes the data of the data storage device 21 to estimate, identify, determine, etc. the on-board element 5 and / or the ground element 4 whose communication function is deteriorated. The analysis result output module 23 generates notification information of the analysis result and executes output such as displaying the information. At least the deterioration location analysis module 22 of the ground equipment 3 constitutes a part of the management device of the diagnostic system. For example, the management device includes a sub-diagnosis system 100, a determination result recording device 11, a transmitter 12, a receiver 20, a deterioration location analysis module 22, and an analysis result output module 23. The sub-diagnosis system 100 of the train 2 may be realized in the ground equipment 3.

FIG. 2 is a perspective view of a model in which the train 2 is traveling on the track 300. Ground elements 4 are laid in order at positions B1, B2, and B3 on the track 300. When the train 2 travels on the track, the on-board element 5 of the train 2 sequentially receives information waves from the plurality of ground elements 4. The track 300 includes a high-speed section 25 in which the upper limit speed of the train 2 is set to a high speed, and a low-speed section 26 in which the upper limit speed of the train 2 is limited to a low speed. The ground element 4 (B1, B2) exists in the high-speed section 25, and the ground element 4 (B3) exists in the low-speed section 26. The ground element 4 (B1, B2) has information on the upper limit speed (high speed), and the ground element 4 (B3) has information on the upper limit speed (low speed). As described above, the upper limit speed extraction module 17 extracts the upper limit speed information from the information wave from the ground element 4 when the on-board element 5 passes through the ground element 4.

Since the communicable distance (management parameter) between the on-board child 5 and the ground element 4 changes according to the speed of the train 2, the minimum communicable distance 27 as a reference value for which the communicable distance should be compared is set. , The high-speed section 25 and the low-speed section 26 of the train 2 are set to have different values (determination value calculation module 19). The upper limit speed of the high-speed section 25 is 150 [km / h], the upper limit speed of the low-speed section 26 is 30 [km / h], and the on-board element 5 normally receives the information wave from the ground element 4. When the minimum reception time required for the above is 10 [ms], the minimum communicable distance 27 of the ground element 4 (B1, B2) becomes 0.42 [m] by the following equation 1 and the ground element 4 (B3). ) The minimum communicable distance 27 is 0.083 [m].

[Number 1]
Lmin = Vmax x Tmin
Lmin: Minimum communicable distance Vmax: Upper limit speed (Example: High-speed section: 150 [km / h], Low-speed section: 30 [km / h])
Tmin: Minimum reception time (example: 10 [ms])

The maximum train speed, the minimum reception time, the number of ground elements 4, the number of divisions of the traveling section, the calculation formula for determining the communicable distance, and the like are examples, and are not limited to those described above. For example, the minimum communicable distance may be adjusted depending on disturbance factors such as weather, season, and temperature. The transmission from the transmitter 12 to the receiver 20 may be constant, or may be at the end of the operation of the train 2.

Next, the analysis process will be described in detail in the deteriorated portion analysis module 22. As described above, the data storage device 21 is located between the on-board element 5 (A1, A2, A3, A4, ...) And the ground element 4 (B1, B2, B3, B4, ...). The deterioration determination result (deterioration determination module 10) is stored in association with the on-board child identification number, the ground element identification number, the communicable distance (communicable distance calculation module 16), the communication time, and the like. FIG. 3 shows an example of the data structure of the data storage device 21. "OK" indicates that the quality of the non-contact communication between the on-board element 5 and the ground element 4 has not deteriorated, while "NG" indicates that the non-contact communication has deteriorated. ing. In TB10 of FIG. 3, each combination (TB11) of the on-board element A3 and the ground element B1, the on-board element A3 and the ground element B3, and the on-board element A3 and the ground element B4 is determined to be deteriorated. Since the deterioration determination is concentrated on the on-board child A3, it can be estimated, specified, and determined that the communication function of the on-board child A3 has deteriorated.

In TB20 of FIG. 3, each combination (TB21) of the on-board element A1 and the ground element B2, the on-board element A2 and the ground element B2, and the on-board element A4 and the ground element B2 is determined to be deteriorated. Since the deterioration determination is concentrated on the ground element B2, it can be identified that the communication function of the ground element B2 is deteriorated.

In TB30 of FIG. 3, if there is deterioration judgment in an irregular and large number of combinations of the ground element 4 and the on-board element 5, both the on-board element 5 and the on-board element 4 are deteriorated, or the weather, etc. The effect of communication failure due to the disturbance of is estimated. Therefore, the deterioration location analysis module 22 arranges the communicable distances in chronological order as shown in FIG. 4 for the combination of the on-board element 5 and the ground element 4, which are suspected of being deteriorated, and associates the weather data with the date and time in the short term. Therefore, it can be clarified that the communicable distance has temporarily deteriorated due to bad weather. That is, the deterioration location analysis module 22 can clarify that there is no deterioration in the communication function of the combination of the on-board element 5 and the ground element 4, which are suspected of being deteriorated.

Further, as shown in FIG. 5, the deterioration location analysis module 22 can communicate with each other due to aging of the on-board element 5 and the ground element 4 even in the combination of the on-board element 5 and the ground element 4 which are not suspected of being deteriorated. The communication quality of the combination of the on-board element 5 and the ground element 4 is determined by the deterioration determination module 10 by obtaining the approximate function from the plot of the long-term change of the communication distance, for example, the change of the monthly average value of the communicable distance. In the above, it is possible to predict the time when it will be determined to be deteriorated, that is, the time when normal communication cannot be performed between the two (estimated failure time). Then, the deterioration location analysis module 22 can set a time for recommending replacement of the ground element 4 and / or the on-board element 5 before the estimated failure time.

Next, the analysis process executed by the deterioration location analysis module 22 of the ground equipment 3 has been described as shown in FIG. 3, but will be described in more detail as follows. FIG. 6 is a flowchart for explaining the identification of the ground element 4 in which deterioration actually occurs from the judgment result of the communication quality between the ground element 4 and the on-board element 5. FIG. 7 is similarly on-vehicle. It is a flowchart explaining the identification of child 5. The deterioration location analysis module 22 executes these flowcharts in order. In referring to this flowchart, the meanings of the symbols displayed in the flowchart are as follows.
Ai: i-th ground element (i = 1,2, ..., n)
Bj: jth on-board child (j = 1,2, ..., m)
n: Number of ground elements m: Number of on-board elements Xij: Deterioration judgment result during communication between Ai and Bj (Xij = 0: normal, Xji = 1: deterioration)
Di: Number of on-board elements judged to be communication deterioration with Ai Dj: Number of ground elements judged to be communication deterioration with Bj ET: Judgment threshold (0 <ET ≦ 1)

First, the flowchart of FIG. 6 will be described. The deterioration location analysis module 22 starts the flowchart at a predetermined event. For example, as an event, there is an inspection date and time once a month. The deterioration location analysis module 22 evaluates the communication quality with all the ground elements 4 in order for each on-board element 5. Therefore, the deterioration location analysis module 22 sets “1” for “j”, sets “0” for “Dj”, sets the first on-board element 5, and starts the flowchart (S100). .. Next, the deterioration location analysis module 22 sets “1” for “i” and sets the first ground element 4 for which the presence or absence of deterioration should be determined (S102).

Next, the deterioration location analysis module 22 checks the determination result (deterioration determination module 10) of the combination (Xij) of the ground element 4 and the on-board element 5 with reference to the accumulated information of the data storage device 21 (FIG. 1). (S104). When the deterioration location analysis module 22 determines that this determination is "deterioration (Xij = 1)" (S104: Y), 1 is added to Dj (S106).

When the deterioration location analysis module 22 determines that the determination is "no deterioration (Xij = 0)" (S104: N) and whether or not i = n (S108), that is, all the ground elements 4 are determined. If it is checked and denied (S108: N), "1" is added to "i" (S110), and it returns to S104 and moves to the next judgment of the ground element 4, while S108. If affirmed (S108: Y), the process proceeds to S112.

In S112, the deterioration location analysis module 22 refers to the accumulated information of the data storage device 21 (FIG. 1), and refers to the ground element 4 whose communication quality with the on-board element 5 (Bj) to be determined is determined to be deteriorated. It is determined whether or not the number (Dj) is larger than the reference (ET * n). That is, the deterioration location analysis module 22 determines whether or not Dj ≧ ET * n, and if this is denied, the ground is determined to have deteriorated communication quality in combination with the on-board element 5 to be determined. Assuming that there are few children 4 and there is no deterioration or failure in the communication function of the on-board child 5, the process proceeds to S116. In S116, the deterioration location analysis module 22 determines whether or not the determination has been completed for all the on-board elements 5, that is, whether or not j = m, and if this is denied, "j" is set to "1". Is added (S118) to return to S102, the determination of the next on-board child 5 is continued, and if S116 is affirmed, it is assumed that the determination is completed for all on-board child 5, and the flowchart ends.

The deterioration location analysis module 22 shifts to S114 when it is determined in S112 that the number of ground elements 4 determined to have deteriorated in communication quality with the on-board element 5 (Bj) to be determined is equal to or greater than the standard. .. In S114, the deterioration location analysis module 22 causes the on-board element 5 (Bj) determined that the communication with the ground element 4 is deteriorated by a factor other than the communication function of the on-board element 5, for example, the above-mentioned. It is determined whether or not there is bad weather such as rain or snow. This determination may be as described above (see FIG. 4). When the deterioration location analysis module 22 determines that bad weather is related (S114: Y), it shifts to S116 on the assumption that there is no problem in the communication function of the on-board child 5 (Bj). On the other hand, when the deterioration location analysis module 22 determines that the bad weather is not related (S114: N), it determines that there is a problem in the communication function of the on-board child 5 (Bj) and the deterioration occurs (S115).

The deterioration location analysis module 22 can determine whether or not the communication function of all the on-board elements 5 is deteriorated and identify the deteriorated on-board elements 5 by the above flowchart. When the deterioration location analysis module 22 finishes this flowchart, it subsequently starts the flowchart of FIG. 7 to determine whether or not the ground element 4 has deteriorated. The deterioration location analysis module 22 evaluates the communication quality with all the on-board elements 5 in order for each ground element 4. Therefore, the deterioration location analysis module 22 sets “1” for “i”, sets “0” for “Di”, sets the first ground element 4, and starts the flowchart (S200). Next, the deterioration location analysis module 22 sets “1” for “j” and sets the first on-vehicle element 5 for which the presence or absence of deterioration should be determined (S202).

Next, the deterioration location analysis module 22 checks the determination result (deterioration determination module 10) of the combination (Xij) of the ground element 4 and the on-board element 5 with reference to the accumulated information of the data storage device 21 (FIG. 1). (S204). When the deterioration location analysis module 22 determines that this determination is "deterioration (Xij = 1)" (S204: Y), 1 is added to Di (S206).

When the deterioration location analysis module 22 determines that the determination is "no deterioration (Xij = 0)" (S204: N) and whether or not j = m (S208), that is, all the on-board elements 5 are determined. It is checked whether or not it has been done, and if this is denied (S208: N), "1" is added to j (S210), and it returns to S204 and shifts to the judgment of the next on-board child 5, while S208. If (S208: Y) is affirmed, the process proceeds to S212.

In S212, the deterioration location analysis module 22 refers to the accumulated information of the data storage device 21 (FIG. 1), and refers to the on-board element 5 whose communication quality with the ground element 4 (Ai) to be determined is determined to be deteriorated. It is determined whether or not the number (Di) is larger than the standard (ET * m). That is, the deterioration location analysis module 22 determines whether or not Di ≧ ET * m, and if this is denied, the communication quality is determined to be deteriorated on the vehicle in combination with the ground element 4 to be determined. Assuming that there are few children 5 and there is no deterioration or failure in the communication function of the ground element 4, the process proceeds to S216. In S216, the deterioration location analysis module 22 determines whether or not the determination has been completed for all the ground elements 4, that is, whether or not i = 1, and if this is denied, "i" is set to "1". Is added and returned to S202, the determination of the next ground element 4 is continued, and if S216 is affirmed, it is assumed that the determination is completed for all the ground elements 4, and the flowchart ends.

The deterioration location analysis module 22 shifts to S214 when it is determined in S212 that the number of on-board elements 5 determined to have deteriorated in communication quality with the ground element 4 (Ai) to be determined is equal to or greater than the standard. .. In S214, the deterioration location analysis module 22 causes the ground element 4 (Ai) determined that the communication with the on-board element 5 is deteriorated due to factors other than the communication function of the ground element 4, for example, as described above. Determine if there was bad weather such as heavy rain or snow. When the deterioration location analysis module 22 determines that bad weather is related (S214: Y), it shifts to S216 on the assumption that there is no problem in the communication function of the ground element 4 (Ai). On the other hand, when the deterioration location analysis module 22 determines that the bad weather is not related (S214: N), it determines that there is a problem in the communication function of the ground element 4 (Ai) and has deteriorated (S215), and shifts to S216. To do.

The deterioration location analysis module 22 can evaluate whether or not the communication function of all the ground elements 4 is deteriorated by the above flowchart.

According to the above-described embodiments (FIGS. 1 to 7), the communication state and communication quality of non-contact communication between the ground element 4 and the on-board element 5 are diagnosed and evaluated by the communicable distance (communicable distance calculation module 16). Therefore, it is possible to identify the ground element 4 and / or the on-board element 5 whose communication function is deteriorated without being affected by the magnitude of the train speed.

Further, according to the above-described embodiment, the reference (judgment value: judgment value calculation module 19) for determining the deterioration of communication quality is determined using the upper limit speed of the traveling section in which the ground element 4 is installed. Therefore, it is possible to appropriately determine the presence or absence of deterioration of the ground element 4 for each traveling section. For example, in the high-speed section 25 where the communication time between the ground element 4 and the on-board element 5 is short, the determination value becomes large, so that the deterioration of the characteristics of the ground element 4 can be detected early and a margin can be provided before the ground element 4 fails. The ground element 4 can be exchanged. On the other hand, in the low-speed section 26 where the communication time is sufficient, the life of the ground element 4 can be extended by allowing a slight deterioration of the ground element 4 by reducing the determination value. In relation to FIG. 2, if the determination value is a fixed value regardless of the upper limit speed, for example, 0.42 [m] in the high-speed section 25, an excessive determination is made for the ground element 4 (B3) in the low-speed section 26. It becomes a value, and it is determined that the ground element 4 is deteriorated even though the communication function of the ground element 4 is not actually deteriorated. On the other hand, if the determination value is 0.083 [m], which is one-fifth of the high-speed section 25, in accordance with the low-speed section 26, the ground element 4 in the low-speed section 26 is not unreasonably determined to be deteriorated. Therefore, the replacement of the ground element 4 is properly executed without being accelerated.

On the other hand, in the prior art described in Patent Document 1, the actual communication characteristic between the ground element 4 and the on-board element 5 is that the ground element 4 is activated by wireless power transmission from the on-board element 5. Although it is determined by the time spent and the information wave level from the ground element 4, it only monitors the information wave level. Therefore, it is not sufficient as preventive maintenance of the communication unit because it is overlooked that the time or communication distance required for communication cannot be secured due to the deterioration of the wireless power transmission / reception unit.

In the prior art described in Patent Document 2, the determination value used for diagnosing deterioration of the communication function is a fixed value determined by the communication method used, the antenna gain, the transmission output, etc., and this fixed value is the maximum speed. Since the strictest combined value should be applied, it becomes an excessive criterion and the communication device is replaced under the condition that sufficient packets can be received with a short communication distance, such as the low-speed running section of train 2. The cycle of operation will be shortened unnecessarily. Further, in the prior art, even if deterioration of the communication device is detected based on the communicable distance, it is not possible to distinguish whether the deterioration occurs in the ground element 4 or the on-board element 5.

Further, according to the above-described embodiment, when the diagnostic system determines the deterioration of the ground element 4, it refers to the management parameters of the plurality of trains 2 (plurality of on-board elements 5) accumulated in the ground equipment. , It is possible to determine the deterioration of the on-board element 5 at the same time as determining the deterioration of the ground element 4. Therefore, instead of replacing the ground element 4 and the on-board element 5 at the same time, the ground element 4 or the on-board element 5 whose communication function has deteriorated may be replaced.

In the above-described embodiment, the diagnostic system acquires the upper limit speed of the train 2 from the information wave of the ground element 4, but other communication means may be used, or the train 2 is provided with a database for a section. The upper limit speed may be recorded in advance for each. The communication between the transmitter 12 and the receiver 20 may be wireless, wired communication, or communication via a memory card.

The determination value calculation module 19 adds an arbitrary margin to the determination value, but is not limited to this, and adds a margin to the minimum reception time or subtracts the margin from the value calculated by the communicable distance calculation module 16. May be good. The data length may be determined by the number of packets of the received information wave, or may be determined by counting the number of bits of the data. The former has the advantage of simplifying the process, and the latter has the advantage of being able to diagnose deterioration of the communicable distance with higher resolution.

In the above-described embodiment, the case where the communicable distance is calculated based on the data length of the information wave extracted by the data length extraction module 13 has been described, but the present invention is not limited to this, and the reception level is further referred to. May be done.

FIG. 8 shows a train control system 30 that uses the reception level to calculate the communicable distance. As shown in FIG. 8, at the same timing as calculating the management parameter, the third processing module 32 installed in the train 31 receives by measuring the time when the reception level exceeds the detection threshold value 34. Calculate the time. The reception level is extracted from the information wave by the reception level extraction module 33. Further, the detection threshold value 34 is stored in the memory in advance.

The third processing module 32 has a dedicated software configuration for verifying the management parameters calculated by the first processing module 7, and includes a reception level extraction module 33, a reception time calculation module 35, and a communicable distance calculation module 36. Is configured with.

The reception time calculation module 35 verifies whether the reception time calculated by the first processing module 7 is correct by using the reception time calculated by the third processing module 32. For example, if the value calculated by the third processing module 32 is less than 70% of the value calculated by the first processing module 7, the reception time calculation module 35 determines that the reception level is low for some reason. Can be determined.

Further, for example, when the value calculated by the first processing module 7 is less than 70% of the value calculated by the third processing module 32, the reception time calculation is performed if the data length is shortened due to the influence of noise or the like. Module 35 can determine. The reception time calculated by the third processing module 32 may be used instead of the reception time calculated by the first processing module 7.

Further, in the above-described embodiment, the case where the upper limit speed set in the ground element 4 is fixed has been described, but the present invention is not limited to this, and even if the upper limit speed set in the ground element 4 is changed. Good.

FIG. 9 shows a train control system 50 capable of changing the upper limit speed set on the ground element 4. As shown in FIG. 9, the upper limit speed setting module 52 installed in the ground equipment 51 is equipped with the ground element 4 based on the information of the deteriorated part of the ground element 4 output from the analysis result output module 23. The upper limit speed of the section is set to a small value so that it is not determined that the ground element 4 has deteriorated.

Further, in the above-described embodiment, the case where the on-board child 5 deteriorated by the on-board child determination process is detected and then the deteriorated ground element 4 is detected by the ground element determination process has been described. Not limited to this, after the ground element 4 deteriorated by the ground element determination process is detected, the on-board element 5 deteriorated by the on-board element determination process may be detected.

Further, in the above-described embodiment, the case where the upper limit speed is acquired from the information wave from the ground element 4 has been described, but the present invention is not limited to this, and the upper limit speed is from another device of the ground equipment 3. It may be acquired from the information, or the train 2 may be provided with a database, the upper limit speed for each section may be recorded in advance in the database, and the upper limit speed may be acquired from the database.

Further, in the above-described embodiment, the case where a value obtained by multiplying the minimum communicable distance 27 by a predetermined safety factor larger than 1, for example, is used as the determination value has been described, but the present invention is not limited to this, and the minimum reception time Tmin is not limited to this. May be multiplied by a predetermined safety factor greater than 1, or the communicable distance calculated by the communicable distance calculation module 16 may be multiplied by a predetermined safety factor less than 1.

Further, in the above-described embodiment, the case where the deterioration of the ground element 4 and the on-board element 5 is determined by using the binary determination result of OK or NG has been described, but the present invention is not limited to this. Deterioration of the ground element 4 and the on-board element 5 may be determined using the determination results of three or more values such as Δ and ×.

Further, in the above-described embodiment, the case where the deterioration of the ground element 4 and the on-board element 5 is determined using the determination result has been described, but the present invention is not limited to this, and the ground element 4 is not limited to this, and the communicable distance is used. And the deterioration of the on-board element 5 may be determined.

Further, in the above-described embodiment, the case where each module has its own dedicated software configuration has been described, but the present invention is not limited to this, and each module may have its own dedicated hardware configuration.

When the communicable distance is used, the monthly average value may be used, or the daily average, annual average, moving average, or the like may be used. The deterioration of the ground element 4 and the on-board element 5 may be determined by using the amount of change in the communicable distance such as the value obtained by subtracting the previous month's average value from the current month's average value.

1,30,50 ... train control system, 2,31 ... train, 3,51 ... ground equipment, 4 ... ground module, 5 ... on-board module, 6 ... information wave receiver, 7 ... 1st processing module, 8 ... 2nd processing module, 9 ... train speed measuring device, 10 ... deterioration judgment module, 11 ... judgment result recording device, 12 ... transmitter, 13 ... data length extraction Module, 14 ... Transmission speed, 15, 35 ... Reception time calculation module, 16, 36 ... Communicationable distance calculation module, 17 ... Upper limit speed extraction module, 18 ... Minimum reception time, 19 ... Judgment value calculation Module, 20 ... receiver, 21 ... data storage device, 22 ... deteriorated part analysis module, 23 ... analysis result output module, 32 ... third processing module, 33 ... reception level extraction module, 34 ... … Detection threshold, 52 …… Upper limit speed setting module.

Claims (7)

A diagnostic system that diagnoses non-contact communication between multiple vehicles.
Each of the plurality of traveling bodies travels along the traveling path,
A plurality of ground elements are arranged in order along the road.
In the process in which each of the plurality of traveling bodies travels along the traveling path, on-board elements capable of non-contact communication with each of the plurality of ground elements are installed in each of the plurality of traveling bodies.
The plurality of ground elements are activated by the power wave output by the on-board element, and wirelessly transmit the information held in advance to the on-board element to establish the non-contact communication.
The diagnostic system
A management device for managing the communication quality between the on-board child and each of the plurality of ground children is provided.
The management device is
From the execution result of non-contact communication between the on-board element and the plurality of ground elements, the reception time required to receive the signal from the on-board element and the on-board on the vehicle for each of the plurality of ground elements. Based on the traveling speed of the traveling body having the child, the communicable distance as the distance at which the on-board child can receive the signal from the ground element is calculated as a management parameter.
Based on the traveling upper limit speed of the traveling body in a certain section of the traveling path on which the ground element is installed, and the minimum reception time required for the on-board element to normally receive a signal from the ground element. Calculate the judgment value
By comparing the management parameter with the determination value, a determination is made for each combination of the ground element and the front vehicle upper element.
A diagnostic system that records the determination results of the management parameters for each on-board child installed on each of the plurality of traveling bodies. The diagnostic system according to claim 1, wherein the management device identifies an on-vehicle element or a ground element whose communication quality is deteriorated based on the management parameters for each on-vehicle element installed in each of the plurality of traveling bodies. .. The ground element holds the position information and the traveling upper limit speed in advance, and wirelessly transmits the position information and the traveling upper limit speed to the on-board element.
The diagnostic system according to claim 2, wherein the management device calculates the determination value using the traveling upper limit speed received from the ground element as the traveling upper limit speed of the section in which the ground element is installed. The diagnostic system according to claim 3, wherein the management device instructs the ground element, which is identified as having deteriorated communication quality, to change the traveling upper limit speed to be held. The management device is
The diagnostic system according to claim 4, wherein the reception time is calculated by dividing the data length extracted from the signal received by the on-board child from the ground element by the transmission speed of the signal. The diagnostic system according to claim 4, wherein the management device extracts a reception level of a signal received by the on-board child from the ground element, and sets a time when the reception level exceeds a threshold value as the reception time. It is a diagnostic method for diagnosing non-contact communication between multiple vehicles.
Each of the plurality of traveling bodies travels along the traveling path,
A plurality of ground elements are arranged in order along the road.
In the process in which each of the plurality of traveling bodies travels along the traveling path, on-board elements capable of non-contact communication with each of the plurality of ground elements are installed in each of the plurality of traveling bodies.
The plurality of ground elements are activated by the power wave output by the on-board element, and wirelessly transmit the information held in advance to the on-board element to establish the non-contact communication.
The management device that manages the communication quality between the on-board child and each of the plurality of ground children is
From the execution result of non-contact communication between the on-board element and the plurality of ground elements, the reception time required to receive the signal from the on-board element and the on-board on the vehicle for each of the plurality of ground elements. Based on the traveling speed of the traveling body having the child, the communicable distance as the distance at which the on-board child can receive the signal from the ground element is calculated as a management parameter.
Based on the traveling upper limit speed of the traveling body in a certain section of the traveling path on which the ground element is installed, and the minimum reception time required for the on-board element to normally receive a signal from the ground element. Calculate the judgment value
By comparing the management parameter with the determination value, a determination is made for each combination of the ground element and the front vehicle upper element.
A diagnostic method for recording the determination result of the management parameter for each on-board child installed on each of the plurality of traveling bodies.

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