JP7314529B2 - Mobile object management device, mobile object management system, and mobile object monitoring data transmission method - Google Patents

Description

The present disclosure relates to a mobile management apparatus, a mobile remote monitoring system, and a mobile monitoring data transmission method for remotely monitoring the operation status of a mobile.

2. Description of the Related Art Conventionally, there is a system that monitors the operating status of a moving object such as a train or automobile by acquiring position information, speed information, etc. of the moving object by a vehicle-mounted device mounted on the moving object, such as trains and automobiles, by using a monitoring device in a remote location at predetermined time intervals through wireless communication. By constructing such a system, it is possible to monitor the operating conditions of moving bodies, road congestion conditions, and the like.

JP-A-62-221078 JP 2014-160890 A

In the system described above, when a mobile body moves into a place where it is difficult for radio waves to reach and wireless communication is impossible, such as tunnels and mountains, the information acquired during that time is stored in the on-board device, and when the mobile body moves to a place where wireless communication is possible, it is collectively transmitted to the monitoring device.

However, the longer the mobile unit stays in a place where wireless communication is not possible, the more information to be transmitted together, and the longer the transmission time. Therefore, there is a problem that it takes time for the monitoring device to acquire information of high importance, and the accuracy of remote monitoring is lowered.

The present disclosure has been made in view of the above circumstances, and aims to provide a mobile management apparatus, a mobile management system, and a monitoring data transmission method for a mobile that can quickly and wirelessly transmit highly important information to a monitoring apparatus located remotely from the mobile when the mobile moves from a location where wireless communication is not possible to a location where wireless communication is possible.

A mobile body management apparatus of the present disclosure for achieving the above object is mounted on a mobile body and wirelessly connected to a remote monitoring server installed at a remote location, a monitoring data generation unit for generating monitoring data for the mobile body at predetermined time intervals, a monitoring data storage unit capable of storing the monitoring data generated by the monitoring data generation unit, and when wireless communication with the remote monitoring server is possible, the monitoring data generated by the monitoring data generation unit is sequentially transmitted to the remote monitoring server, and wireless communication with the remote monitoring server is disabled. In the state, the monitoring data generated by the monitoring data generation unitis stored in the monitoring data storage unit, and the importance of each of the plurality of stored monitoring data is calculated and weighted every predetermined time,and a monitoring data processing unit that, upon detecting that wireless communication with the remote monitoring server has changed from a state in which wireless communication is impossible to a state in which wireless communication is possible, gives priority to data with a high weighting value and transmits the monitoring data accumulated in the monitoring data storage unit to the remote monitoring server.

Further, the mobile body management system of the present disclosure includes a mobile body management device mounted on a mobile body, and a remote monitoring server wirelessly connected to the mobile body and installed at a remote location from the mobile body. Monitoring data transmitted to a remote monitoring server and generated by the monitoring data generation unit when wireless communication with the remote monitoring server is disabledis stored in the monitoring data storage unit, and the importance of each of the plurality of stored monitoring data is calculated and weighted every predetermined time,and a monitoring data processing unit that gives priority to data having a high weighting value and transmits the monitoring data accumulated in the monitoring data storage unit to the remote monitoring server when it is detected that wireless communication with the remote monitoring server has changed from an impossible state to a possible state.

In the method for transmitting monitoring data of a mobile object of the present disclosure, a mobile object management device mounted on a mobile object and connected via a network to a remote monitoring server installed at a remote location and having a monitoring data storage unit generates monitoring data of the mobile object at predetermined time intervals, sequentially transmits the generated monitoring data to the remote monitoring server when wireless communication with the remote monitoring server is possible, and generates monitoring data when wireless communication with the remote monitoring server is impossible.is stored in the monitoring data storage unit, and the importance of each of the plurality of stored monitoring data is calculated and weighted every predetermined time,When it is detected that wireless communication with the remote monitoring server has changed from a state in which wireless communication is impossible to a state in which wireless communication is possible, the monitoring data stored in the monitoring data storage unit is sent to the remote monitoring server with priority given to data with a high weighting value.

According to the mobile object management device, mobile object management system, and mobile object monitoring data transmission method of the present disclosure, when a mobile object moves from a place where wireless communication is not possible to a place where wireless communication is possible, it is possible to quickly and wirelessly transmit information of high importance to a monitoring device located at a remote location from the mobile object.

1 is an overall diagram showing the configuration of a mobile management system according to an embodiment; FIG. It is a flowchart which shows the process performed by the vehicle-mounted equipment of the mobile in a mobile management system by one Embodiment. 4 is a graph showing changes over time in monitoring data generated by an on-vehicle device of a mobile object in the mobile object management system according to one embodiment.

<Configuration of mobile management system according to one embodiment>
A configuration of a mobile management system as one embodiment will be described below with reference to FIG. A mobile object management system 1 according to this embodiment includes an onboard device 20 as a mobile object management device mounted on a mobile object 10 such as a train, and a remote monitoring server 50 wirelessly connected to the onboard device 20 via a wireless base station 30 and a network 40.

A plurality of device control devices (first device control device 11-1, second device control device 11-2) related to devices in the mobile device 10, such as a fuel pump and an engine, a wireless antenna 12 that performs wireless communication with a remote monitoring server 50 via a wireless base station 30 and a network 40, and a vehicle-mounted device 20 connected to these device control devices 11-1 and 11-2 and the wireless antenna 12 are installed in the moving body 10. FIG. 1 shows the case where two device control devices, the first device control device 11-1 and the second device control device 11-2 installed in the moving body 10, are connected to the vehicle-mounted device 20, but may be connected to more control devices related to the devices in the moving body 10.

The vehicle-mounted device 20 has a data input section 21 , a monitoring data generating section 22 , a monitoring data storage section 23 , a communication control section 24 and a monitoring data processing section 25 .

The data input unit 21 acquires operation status data of the corresponding equipment from the first equipment control device 11-1 and the second equipment control device 11-2, and inputs the data to the vehicle-mounted device 20. FIG. The monitoring data generation unit 22 processes the operation status data input from the data input unit 21 to generate monitoring data for monitoring the operation of the mobile body 10 . The monitoring data storage unit 23 is a memory that can store the monitoring data generated by the monitoring data generation unit 22 . The communication control unit 24 performs wireless communication with the remote monitoring server 50 via the wireless base station 30 and network 40 .

The monitoring data processing unit 25 causes the communication control unit 24 to sequentially transmit the monitoring data generated by the monitoring data generating unit 22 to the remote monitoring server 50 when wireless communication with the remote monitoring server 50 is possible by the communication control unit 24. Further, when the communication control unit 24 cannot communicate wirelessly with the remote monitoring server 50, the monitoring data generated by the monitoring data generating unit 22 is weighted according to the importance of the monitoring data and stored in the monitoring data storage unit 23. Further, when it is detected that wireless communication with the remote monitoring server 50 has changed from a state in which wireless communication is impossible to a state in which it is possible, data with a high weighting value is prioritized, and the monitoring data accumulated in the monitoring data storage unit 23 is transmitted to the remote monitoring server 50 by the communication control unit 24. - 特許庁

The remote monitoring server 50 is connected to vehicle-mounted equipment of a plurality of moving bodies including the moving body 10 via the network 40, acquires monitoring data transmitted from these moving bodies, and performs monitoring processing.

<Operation of mobile management system according to one embodiment>
Next, the operation of the mobile management system 1 according to this embodiment will be described with reference to the flowchart of FIG. FIG. 2 shows the processing executed by the vehicle-mounted device 20 of the mobile object 10 to be monitored while the mobile object management system 1 is in operation.

In this embodiment, while the mobile object 10 is moving, the first device control device 11-1 and the second device control device 11-2 acquire operation status data of the corresponding devices at predetermined time intervals and send the data to the vehicle-mounted device 20. In the vehicle-mounted device 20, the operation status data transmitted from the first device control device 11-1 and the second device control device 11-2 are input to the vehicle-mounted device 20 from the data input unit 21. FIG.

In the vehicle-mounted device 20, when the communication control unit 24 is ready for wireless communication with the remote monitoring server 50 via the wireless antenna 12 (“YES” in S1), when operation status data is input from the data input unit 21 (“YES” in S2), the operation status data is processed in the monitoring data generation unit 22 to generate monitoring data for monitoring the operation of the mobile unit 10 (S3). The generated monitoring data is transmitted from the communication control section 24 to the remote monitoring server 50 via the wireless antenna 12 by the monitoring data processing section 25 (S4). The processes of steps S2 to S4 are repeatedly executed while wireless communication with the remote monitoring server 50 is enabled by the communication control unit 24 .

Then, when the mobile unit 10 moves into a tunnel or other place where radio waves do not reach and wireless communication with the remote monitoring server 50 becomes impossible ("NO" in S1), until wireless communication becomes possible again ("NO" in S5), the monitoring data processing 25 calculates the importance of the monitoring data generated based on the input operation status data ("YES" in S6, S7) (S8). Then, the monitoring data weighted according to the calculated degree of importance is accumulated in the monitoring data accumulation unit 23 (S9).

The importance of monitoring data is calculated as a high value for data acquired within a predetermined time period before and after the occurrence of an abnormality in the mobile body 10, or data acquired within a predetermined time period before and after the timing at which the rate of change within the predetermined time period exceeds a predetermined value. Here, whether or not an abnormality has occurred is determined, for example, based on the issuance of an alarm that sounds when an abnormal state is detected.

Also, regarding the monitoring data of the moving body 10, an example when the rate of change within a predetermined time exceeds a predetermined value will be described with reference to FIGS. 3(a) to 3(c). FIG. 3(a) shows temporal changes in velocity data (primary differential data) obtained based on position information (monitoring data) of the mobile object 10 at predetermined intervals, FIG. 3(b) shows temporal changes in acceleration data (secondary differential data) generated from the velocity data, and FIG. 3(c) shows temporal changes in acceleration change rate data generated from the acceleration data.

FIGS. 3A to 3C show changes in data when the vehicle-mounted device 20 and the remote monitoring server 50 are in a state of being able to communicate wirelessly, the transmission of monitoring data from the vehicle-mounted device 20 to the remote monitoring server 50 is started at time t0, the storage of monitoring data is started when wireless communication is disabled at time t1, and the transmission of monitoring data is resumed when wireless communication is enabled at time t5.

Here, when the speed of the moving body 10 suddenly drops temporarily at time t3 between times t1 and t5, the acceleration also drops sharply and the rate of change in acceleration increases. When the rate of change of the increased acceleration exceeds a predetermined value x, the monitoring data acquired during the time period t2 to t4, which is the time period before and after the time t3, is weighted higher than the monitoring data in the other time periods (t1 to t2 and t4 to t5).

Here, the monitoring data processing unit 25 may recognize the timing at which the rate of change exceeds a predetermined value based on the index value of the distance between the corresponding monitoring data and the center of gravity of the distribution group of a plurality of data held in advance in the normal state, such as the Mahalanobis distance. By using such an index value, it is possible to easily and accurately recognize the timing when the importance of monitoring is high. The processes of steps S5 to S9 are repeatedly executed while wireless communication with the remote monitoring server 50 is disabled by the communication control unit 24 .

Then, when the moving object 10 moves to a place where radio waves reach, and the communication control unit 24 becomes ready for wireless communication with the remote monitoring server 50 ("YES" in S5), the monitoring data processing unit 25 confirms whether or not there is data stored in the monitoring data storage unit 23. Here, when it is determined that there is accumulated data ("YES" in S10), data other than data with a high weighting value and data with a high weighting value, data acquired older than a predetermined timing are prioritized as data with a high degree of importance, and the accumulated monitoring data is transmitted from the communication control unit to the remote monitoring server 50 (S11).

The remote monitoring server 50 acquires monitoring data transmitted from the vehicle-mounted devices of a plurality of mobile units including the vehicle-mounted unit 20 of the mobile unit 10, and performs monitoring processing.

According to the above embodiments, when a mobile body moves from a place where wireless communication is not possible to a place where wireless communication is possible, it is possible to quickly wirelessly transmit information of high importance to a monitoring device located at a remote location from the mobile body.

In the above-described embodiment, while wireless communication between the vehicle-mounted device 20 of the mobile object 10 and the remote monitoring server 50 is disabled, each time monitoring data is generated, the degree of importance of the monitoring data is calculated, and the weighting is performed and stored. However, the process is not limited to this process, and the generated monitoring data may be sequentially stored in the monitoring data storage unit 23, and the importance of each of the plurality of stored monitoring data may be calculated and weighted at predetermined time intervals.

1 mobile object management system 10 mobile object 11-1 first device control device 11-2 second device control device 12 wireless antenna 20 vehicle-mounted device 21 data input unit 22 monitoring data generation unit 23 monitoring data storage unit 24 communication control unit 25 monitoring data processing unit 30 wireless base station 40 network 50 remote monitoring server

Claims (5)

mounted on a mobile object and wirelessly connected to a remote monitoring server installed at a remote location,
a monitoring data generation unit that generates monitoring data of the moving object at predetermined time intervals;
a monitoring data storage unit capable of storing the monitoring data generated by the monitoring data generation unit;
when wireless communication with the remote monitoring server is possible, sequentially transmitting the monitoring data generated by the monitoring data generation unit to the remote monitoring server;
storing the monitoring data generated by the monitoring data generation unit in the monitoring data storage unit when wireless communication with the remote monitoring server is not possible;
calculating and weighting the importance of each of the plurality of accumulated monitoring data at predetermined time intervals;
and a monitoring data processing unit that, when detecting that wireless communication with said remote monitoring server has changed from a state in which wireless communication is impossible to a state in which it is possible, gives priority to data with a higher weighting value and transmits the monitoring data accumulated in said monitoring data storage unit to said remote monitoring server. The monitoring data processing unit weights the generated monitoring data within a predetermined time period before and after an abnormality occurs in the moving object or within a predetermined time period before and after a timing when a rate of change within the predetermined time period exceeds a predetermined value, with a high value, when wireless communication with the remote monitoring server is disabled;
2. The mobile unit management apparatus according to claim 1, wherein when it is detected that wireless communication with said remote monitoring server has changed from a state in which wireless communication is not possible to a state in which it is possible, data with a higher weight value and data acquired earlier than a predetermined timing are preferentially transmitted to said remote monitoring server. The monitoring data processing unit recognizes the timing at which the rate of change exceeds a predetermined value based on the index value of the distance between the corresponding monitoring data and the center of gravity of a distribution group of a plurality of data held in advance under normal conditions.
3. The moving body management apparatus according to claim 2, characterized by: A mobile body management device mounted on a mobile body, and a remote monitoring server wirelessly connected to the mobile body and installed at a remote location from the mobile body,
The mobile body management device
a monitoring data generation unit that generates monitoring data of the moving object at predetermined time intervals;
a monitoring data storage unit capable of storing the monitoring data generated by the monitoring data generation unit;
when wireless communication with the remote monitoring server is possible, sequentially transmitting the monitoring data generated by the monitoring data generation unit to the remote monitoring server;
storing the monitoring data generated by the monitoring data generation unit in the monitoring data storage unit when wireless communication with the remote monitoring server is not possible;
calculating and weighting the importance of each of the plurality of accumulated monitoring data at predetermined time intervals;
and a monitoring data processing unit that gives priority to data having a high weighting value and transmits the monitoring data accumulated in the monitoring data storage unit to the remote monitoring server when it is detected that wireless communication with the remote monitoring server has changed from an impossible state to a possible state. A mobile body management device mounted on a mobile body, connected via a network to a remote monitoring server installed at a remote location, and having a monitoring data storage unit,
generating monitoring data of the moving object at predetermined time intervals;
when wireless communication with the remote monitoring server is possible, sequentially transmitting the generated monitoring data to the remote monitoring server;
when wireless communication with the remote monitoring server is not possible, storing the generated monitoring data in the monitoring data storage unit;
calculating and weighting the importance of each of the plurality of accumulated monitoring data at predetermined time intervals;
A monitoring data transmission method for a mobile body, wherein when it is detected that wireless communication with said remote monitoring server has changed from a state in which wireless communication is impossible to a state in which it is possible, priority is given to data with a higher weighting value, and the monitoring data accumulated in said monitoring data storage unit is transmitted to said remote monitoring server.

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