JP4912939B2 - Train position abnormality detection system - Google Patents

Description

  The present invention relates to a train position abnormality detection system, and more particularly to a train position detection system that can determine whether the position information of a train output from a GPS receiver is normal or abnormal. .

  Conventionally, systems such as an ATC (Automatic Train Control) system and an ATO (Automatic Train Operation) system have been widely used in order to detect a train position and perform safe traveling.

  However, such a system, particularly an ATO system, requires a large amount of equipment for the installation of the system, and the installation cost is high. Have difficulty.

For this reason, a GPS receiver that identifies the position of a train by receiving a signal from a GPS satellite is mounted on the train.
In this case, when performing train control using information received from the GPS receiver, the train position is specified based on the received position information from the GPS receiver, and speed control or preceding Although the distance between the train is controlled, it is necessary to ensure that the train position specified by the GPS receiver is not wrong.

In order to determine the abnormality of the train position by the GPS receiver in this way, conventionally, a GPS receiver that uses a plurality of GPS receivers and compares the received data by each GPS receiver to determine the abnormality of the GPS receiver. It has been proposed (see Patent Document 1).
JP 2000-329839 A

  However, according to Patent Document 1, a plurality of GPS receivers are required to ensure safety, and information from each GPS receiver needs to be sequentially compared. Therefore, the control becomes extremely complicated, and There is a problem that the entire system becomes large-scale.

  The present invention has been made in view of the above points, and provides a train position abnormality detection system that does not require large-scale equipment and can detect position information abnormality by a GPS receiver with simple control. It is for the purpose.

In order to achieve the above-mentioned object, the invention according to claim 1 includes a GPS receiver mounted on a train and receiving a signal from a GPS satellite;
A train position abnormality determination device for determining abnormality of the GPS reception information;
An altitude information database corresponding to altitude information corresponding to the position of the train that runs in a general area provided in the train position abnormality detection device, and
The train position abnormality determination device compares the altitude information corresponding to the train position in the altitude information database with altitude information output from the GPS receiver to determine an abnormality in the GPS reception information. It is characterized by that.

According to the first aspect of the present invention, the train position abnormality detection device extracts the altitude information of the train extracted from the altitude information database based on the altitude information corresponding to the approximate area, and the altitude information output from the GPS receiver. Therefore, it is possible to reliably detect an abnormality in the train position with simple control.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing a first embodiment of a train position abnormality detection system according to the present invention.

  As shown in FIG. 1, a train 1 traveling on a predetermined route is equipped with a GPS receiver 3 that receives a signal from a GPS satellite 2, and the GPS receiver 3 has a latitude of the current train 1. , Longitude and altitude can be output. In addition, the train 1 is equipped with an altimeter 4 and a train position abnormality detection device 5 for measuring the current altitude of the vehicle as vehicle position information. In this embodiment, the GPS receiver 3 and the altimeter 4 The train position abnormality detection device 5 constitutes a train position abnormality detection system.

  FIG. 2 is a block diagram illustrating an embodiment of a train position abnormality detection system.

  As shown in FIG. 2, the train position abnormality detection device 5 constituting the train position abnormality detection system inputs latitude, longitude, altitude information output from the GPS receiver 3, and altitude information output from the altimeter 4. Thus, a calculation unit 6 for calculating the difference between the altitude values is provided. Further, the train position abnormality detection device 5 is provided with a position abnormality determination unit 7 that determines an abnormality of the GPS receiver 3 by comparing the altitude difference value of the calculation unit 6 with a predetermined determination threshold value.

  The threshold value input to the position abnormality determination unit 7 can be appropriately set according to the route on which the train 1 travels. For example, when the number of trains 1 traveling on the route is large, if the positional information received by the GPS receiver 3 is abnormal, a sufficient interval is secured to ensure safety with the preceding train 1. Therefore, it is necessary to set a small threshold value in consideration of safety. On the other hand, when the number of trains 1 traveling on the route is small, safety can be sufficiently ensured even if the threshold value is set large.

  Next, the operation of this embodiment will be described with reference to the flowchart shown in FIG.

  In the present embodiment, the GPS receiver 3 receives altitude information together with the latitude and longitude of the current train 1 from the GPS satellite 2, and outputs this altitude information to the calculation unit 6 (ST1).

  Subsequently, the altitude of the train 1 at the current position is measured by the altimeter 4 mounted on the train 1, and this altitude is output to the calculation unit 6 (ST2).

  Then, the calculation unit 6 calculates a difference in altitude information, and outputs the altitude difference value to the position abnormality determination unit 7 (ST3). The position abnormality determination unit 7 inputs a predetermined determination threshold value (ST4), compares this determination threshold value with the altitude difference value sent from the calculation unit 6 (ST5), and if the altitude difference value is larger than the threshold value, an abnormality is detected. (ST6), and if the altitude difference value is smaller than the threshold value, it is determined as normal (ST7).

  As for the position abnormality determination by the position abnormality determination unit 7, for example, when the position abnormality determination unit 7 determines that there is a single abnormality, the position information of the GPS receiver 3 is determined to be abnormal. Alternatively, when the position abnormality determination unit 7 determines that the abnormality is consecutive for a plurality of times, the position information by the GPS receiver 3 may be determined to be abnormal. At this time, how many times it is determined that there is an abnormality can be set as appropriate according to the route on which the train 1 travels, as to whether the position information of the GPS receiver 3 is abnormal.

  After that, the abnormal position information output from the GPS receiver 3 is discarded as necessary, and the train 1 is controlled based on the normal position information. Further, when the position abnormality determination unit 7 always determines that the abnormality is present, appropriate control such as stopping the train 1 is performed.

  Therefore, in this embodiment, since abnormality of the reception information of the GPS receiver 3 is determined based on the altitude information output from the GPS receiver 3, the train position can be reliably determined by simple control. Abnormality can be detected.

  Next, a second embodiment of the present invention will be described with reference to FIG.

  FIG. 4 shows a second embodiment of the present invention, and the train position abnormality detection device 5 includes a calculation unit 6 and a position abnormality determination unit 7 as in the first embodiment. .

  Further, the train position abnormality detection device 5 includes an altitude information corresponding to the area information determined by the approximate area determination unit 8 and the approximate area determination unit 8 that determines the approximate area in which the current train 1 is traveling. An information database 9 is provided, and the train position abnormality detection device 5 extracts the corresponding altitude information from the altitude information database 9 based on the approximate area information output from the approximate area determination unit 8 and calculates the calculation unit 6. Is output.

  For example, when the entire travel section of the train 1 is set as the general area, the altitude range including the minimum altitude and the maximum altitude in the entire travel section may be stored as the altitude information database 9. Further, in the approximate area determination unit 8, when the distance between the stations in the travel section is set as the approximate area, the altitude range between the stations may be stored as the altitude information database 9.

  Furthermore, the travel route may be divided into a plurality of sections, and the altitude range in each section may be stored as the altitude information database 9. In this case, in order to determine which section is currently traveling, for example, the traveling area may be determined based on position information transmitted from a ground unit or a wireless tag installed on the traveling route. Alternatively, the travel area may be determined based on position information manually input by the driver of the train 1.

  Next, the operation of the present embodiment will be described with reference to the flowchart shown in FIG.

  In the present embodiment, the GPS receiver 3 receives altitude information together with the latitude and longitude of the current train 1 from the GPS satellite 2, and outputs this altitude information to the calculation unit 6 (ST11). On the other hand, the approximate area determination unit 8 determines the current approximate area (ST12) and outputs it to the altitude extraction unit 10. Subsequently, the altitude extraction unit 10 extracts the altitude information of the corresponding area from the altitude information database 9 based on the approximate area and outputs it to the calculation unit 6 (ST13).

  Then, the calculation unit 6 calculates whether the altitude sent from the GPS receiver 3 is within the altitude range sent from the altitude extraction unit 10, and outputs this calculation result to the position abnormality determination unit 7 (ST14). If the altitude from the GPS receiver 3 is within the altitude range sent from the altitude extraction unit 10 based on the calculation result, the position abnormality determination unit 7 determines that the information received by the GPS receiver 3 is normal ( ST15). On the other hand, when the altitude from the GPS receiver 3 exceeds the altitude range sent from the altitude extraction unit 10 according to the calculation result, the position abnormality determination unit 7 inputs a predetermined determination threshold and It is determined whether or not the altitude exceeds a threshold value (ST16). If the excess altitude does not exceed the threshold, it is determined that the information received by the GPS receiver 3 is normal (ST15). If the excess altitude exceeds the threshold, it is determined that the information received by the GPS receiver 3 is abnormal (ST17).

  Therefore, in the present embodiment, as in the first embodiment, the abnormality of the signal output from the GPS receiver 3 is determined based on the altitude information output from the GPS receiver 3. With simple control, it is possible to reliably detect abnormalities in the train position. In addition, since the altitude information of the train 1 is extracted based on the altitude information corresponding to the general area, an altimeter is not required, and an abnormality can be detected more easily based on the altitude information.

  Next, a third embodiment of the present invention will be described with reference to FIG.

  FIG. 6 shows a third embodiment of the present invention, and the train position abnormality detection device 5 is similar to the first embodiment and the second embodiment in that the calculation unit 6, the position abnormality determination unit 7, It has. The train position abnormality detection device 5 receives the latitude and longitude position information output from the GPS receiver 3 and outputs the altitude at the position to the calculation unit 6 based on the position information. An altitude information database 9 in which altitude information is associated with the position information of the train 1 is provided. The altitude information database 9 stores an altitude range consisting of a minimum altitude and a maximum altitude at the position of the train 1 as altitude information.

  Other configurations are the same as those of the first and second embodiments.

  Next, the operation of the present embodiment will be described with reference to the flowchart shown in FIG.

  In the present embodiment, the GPS receiver 3 receives altitude information together with the latitude and longitude of the current train 1 from the GPS satellite 2 and outputs the altitude information to the calculation unit 6 (ST20). The position information is output to the altitude extraction unit 10 (ST21). The altitude extraction unit 10 searches the altitude information database 9 for the presence or absence of altitude information corresponding to the position information (ST22). If there is no corresponding altitude information, the position information received by the GPS receiver 3 is appropriate for the travel route. It is determined that the position information is not correct (ST24).

  On the other hand, if the corresponding altitude information exists in the altitude information database 9, the corresponding altitude information is extracted and output to the calculation unit 6 (ST24).

  Then, the calculation unit 6 calculates whether the altitude sent from the GPS receiver 3 is within the altitude range sent from the altitude extraction unit 10, and outputs the calculation result to the position abnormality determination unit 7 (ST25). If the altitude from the GPS receiver 3 is within the altitude range sent from the altitude extraction unit 10 based on the calculation result, the position abnormality determination unit 7 determines that the information received by the GPS receiver 3 is normal ( ST26). On the other hand, when the altitude from the GPS receiver 3 exceeds the altitude range sent from the altitude extraction unit 10 according to the calculation result, the position abnormality determination unit 7 inputs a predetermined determination threshold and It is determined whether or not the altitude exceeds a threshold value (ST27). If the excess altitude does not exceed the threshold, it is determined that the information received by the GPS receiver 3 is normal (ST26). If the excess altitude exceeds the threshold, it is determined that the information received by the GPS receiver 3 is abnormal (ST28).

  Therefore, in the present embodiment, as in the first and second embodiments, the abnormality of the signal output from the GPS receiver 3 is determined based on the altitude information output from the GPS receiver 3. Therefore, it is possible to reliably detect an abnormality in the train position with simple control. In addition, since the altitude information of the train 1 is extracted based on the position information output from the GPS receiver 3, it is possible to detect anomalies using detailed altitude information.

  In each of the above-described embodiments, the case where altitude information is used as the position information of the train 1 has been described. May be used to determine the abnormality of the GPS receiver 3.

  The present invention is not limited to the above-described embodiment, and various modifications can be made based on the gist of the present invention.

1 is a schematic diagram showing a first embodiment of a train position abnormality detection system according to the present invention. 1 is a block diagram illustrating a first embodiment of a train position abnormality detection system according to the present invention. It is a flowchart which shows operation | movement of 1st Embodiment of the train position abnormality detection system which concerns on this invention. It is a block diagram which shows 2nd Embodiment of the train position abnormality detection system which concerns on this invention. It is a flowchart which shows operation | movement of 2nd Embodiment of the train position abnormality detection system which concerns on this invention. It is a block diagram which shows 3rd Embodiment of the train position abnormality detection system which concerns on this invention. It is a flowchart which shows operation | movement of 3rd Embodiment of the train position abnormality detection system which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Train 2 GPS satellite 3 GPS receiver 4 Altimeter 5 Train position abnormality detection apparatus 6 Calculation part 7 Position abnormality determination part 8 General area determination part 9 Altitude information database 10 Altitude extraction part

Claims (1)

A GPS receiver mounted on a train that receives signals from GPS satellites;
A train position abnormality determination device for determining abnormality of the GPS reception information;
An altitude information database corresponding to altitude information corresponding to the position of the train that runs in a general area provided in the train position abnormality detection device, and
The train position abnormality determination device compares the altitude information corresponding to the train position in the altitude information database with altitude information output from the GPS receiver to determine an abnormality in the GPS reception information. A train position abnormality detection system characterized by that.

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