JP4958865B2 - Ground element detector and train controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent erroneous detection of a wayside coil by a simple constitution even if a clearance of a pickup coil and the wayside coil and a position relationship of the right and left sides are varied by rocking or the like of a train. <P>SOLUTION: A receiving level determination part 9 of an onboard device 2 determines the receiving level received through the pickup coil 11 by a transmission/receiving part 8 to decide a wayside coil detection range by a first threshold value Vth1 for wayside coil detection and a second threshold value Vth2 larger than the first threshold value Vth1 by a predetermined level. Even if the clearance of the pickup coil 11 and the wayside coil 4 and the position relationship of the right and left sides is varied by rocking or the like of the train 1 and the receiving level of a receiving signal of the transmission/receiving part 8 are partially and extremely reduced than the threshold value, the erroneous detection of the wayside coil 4 is prevented. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a ground element detecting device and a train control apparatus for detecting a ground element used for various controls such as train stop control and railroad crossing control with an on-board apparatus, and particularly to prevention of erroneous detection of the ground element.

  For example, in order to transmit information between the ground and the vehicle using an ATS device or the like, information is exchanged between the ground element (transmission / reception antenna) provided on the ground and the vehicle element (transmission / reception antenna) provided on the vehicle. . In order to receive the information from the ground unit, as shown in Patent Document 1, the on-board device mounted on the train has a plurality of signals corresponding to signals of different frequencies used in the ground unit installed on the course of the train. A signal is generated and constantly transmitted from the primary side (transmission antenna) of the vehicle upper element, and this signal is received via the secondary side (reception antenna) of the vehicle upper element. When the train approaches the ground element and the signal transmitted from the ground element by electromagnetic coupling between the vehicle element and the ground element is received by the vehicle element, the ground element is detected among the signals received from the secondary side of the vehicle element. The ground element is detected by utilizing the fact that the signal level of the frequency component that resonates with the frequency of the signal to be transmitted increases.

As shown in FIG. 5, the signal level of the signal received from the secondary side of the vehicle upper element (hereinafter referred to as reception level) is such that the vehicle upper element is directly above the ground element, and the center position of the ground element and the vehicle It becomes the maximum when the center positions of the children coincide with each other, and decreases as the center of the vehicle child moves away from the center of the ground child. In order to detect the ground element from the fluctuating reception level, as shown in Patent Document 2, an appropriate threshold value is set, and it is determined that the ground element is detected when the signal level exceeds the threshold value.
JP 2000-21115 A JP 2005-8103 A

  The distance between the vehicle upper and the ground and the positional relationship between the left and right are changed by the swing of the train. For this reason, the reception level when the signal transmitted from the ground element is received by the vehicle element also fluctuates. For example, as shown in FIG. 6, the reception level may be partially lower than the threshold value. If the reception level of the vehicle upper part falls below the threshold value before and after the center position of the vehicle upper element coincides with the center position of the ground element, reception levels exceeding the threshold value are generated at three locations, and the on-board device detects three different ground elements. It will be recognized that it has been detected, and normal train control will not be possible.

  As shown in FIG. 7A, this problem can be solved by increasing the threshold for detecting the ground element, but the detection range of the ground element becomes narrow. Further, when the distance between the vehicle upper element and the ground element and the positional relationship between the left and right sides change due to the swing of the train and the like, as shown in FIG. The detection range becomes extremely narrow, and when the train is traveling at high speed, it becomes impossible to detect the ground element, which causes a fatal problem in train control.

  In order to eliminate these problems, to suppress fluctuations in the reception level of the vehicle upper element, the distance between the vehicle upper element and the ground element due to the coupling degree of the vehicle upper element, the swing of the train, etc. It is necessary to manage the fluctuation within a certain range, and this requires periodic maintenance and management work, which is very expensive. Furthermore, there are cases where management within a certain range is impossible on a route with a poor environment, which is a major limitation in introducing an ATS device or the like.

  An object of the present invention is to provide a ground unit detection device and a train control device that can solve such problems and prevent erroneous detection of the ground unit with a simple configuration.

  The ground unit detection device of the present invention has a transmission / reception unit, a reception level determination unit, and a ground unit information selection unit, and the transmission / reception unit is mounted on the train with information from the ground unit used for various controls of the train. The reception level determination unit receives a first threshold for ground detection and a second threshold that is larger than the first threshold by a predetermined level, and is received from the transmission / reception unit. When the reception level exceeds the first threshold, the ground element provisional detection signal is sent to the ground element information selection unit, and the reception level exceeds the first threshold and then falls below the first threshold before exceeding the second threshold. Canceling the ground child temporary detection signal sent to the ground child information selection unit, and when the reception level exceeds the second threshold and then exceeds the second threshold, sends a ground child detection confirmation signal to the ground child information selection unit, The child information selection unit receives the reception level. When a ground ground temporary detection signal is sent from the receiver, the ground ground information is acquired from the received signal of the transmission / reception section, stored as ground ground temporary detection information and held, and stored when the ground ground temporary detection signal is canceled. When the ground element temporary detection information is discarded and the ground element detection confirmation signal is sent, the stored ground element temporary detection information is confirmed as the ground element information and while the ground element detection confirmation signal is being transmitted, The terrestrial information is acquired from the received signal.

  The train control device of this invention has the above-mentioned ground element detection device, and controls the speed of a train by the detected ground element information.

  In the present invention, the reception level is determined based on the first threshold value for ground element detection and the second threshold value that is larger than the first threshold value by a predetermined level, so that the ground element detection range is determined. Even if the distance between the terrestrial element and the ground element and the positional relationship between the left and right sides fluctuate and the reception level of the received signal partially falls extremely below the threshold value, erroneous detection of the terrestrial element can be prevented.

  Further, even if the reception level as a whole decreases, the ground child temporary detection information acquired when the reception level exceeds the first threshold when the reception level exceeds the first threshold and then exceeds the second threshold. By determining the ground element information, the ground element detection range does not become extremely narrow, and the ground element can be reliably detected even when the train travels at a high speed.

  FIG. 1 is a block diagram showing a configuration of a train control device having the ground element detection device of the present invention. As shown in the figure, the ATS device has an on-board device 2 mounted on a train 1 and ground elements 4 a, 4 b, 4 c provided along the rail 3.

  As shown in the block diagram of FIG. 2, the on-board device 2 includes a ground element detection unit 5, a processing unit 6, and a control unit 7. The ground unit detection unit 5 includes a transmission / reception unit 8, a reception level determination unit 9, and a ground unit information selection unit 10. The transmission / reception unit 8 generates a plurality of signals corresponding to signals of different frequencies used in the ground elements 4a to 4c and constantly transmits them from the primary side (transmission antenna) of the vehicle upper element 11, and this signal is transmitted to the vehicle upper element 11. From the secondary side (receiving antenna) of the receiver and sent to the reception level measuring unit 9. The reception level determination unit 9 is set in advance with a first threshold value Vth1 for ground detection and a second threshold value Vth2 that is larger than the first threshold value Vth1 by a predetermined level. The reception level is compared with the first threshold value Vth1 and the second threshold value Vth2, and the reception level is determined and sent to the ground information selection unit 10. The ground unit information selection unit 10 selects the information of the ground unit 4 received by the transmission / reception unit 8 based on the reception level determination result sent from the reception level determination unit 9. The processing unit 6 generates information to be transmitted by the transmission / reception unit 8 and generates a speed pattern of the train 1 with reference to the ground unit information selected by the ground unit information selection unit 10. The control unit 7 controls the speed of the train 1 based on the speed pattern generated by the processing unit 7.

  Processing when the ground unit 4 is detected by the ground unit detection unit 5 and ground unit information is selected will be described with reference to the flowchart of FIG.

  When the train 1 starts operation and the on-board device 2 starts driving, the transmission / reception unit 8 generates a plurality of signals corresponding to signals of different frequencies used in the ground units 4a to 4c, and 1 of the on-board unit 11 is generated. This signal is always transmitted from the secondary side (transmission antenna), and this signal is received from the secondary side (reception antenna) of the vehicle upper arm 11 and sent to the reception level determination unit 9. The reception level determination unit 9 compares the reception level of the reception signal sent from the transmission / reception unit 8 with the first threshold value Vth1, and determines whether or not the reception level exceeds the first threshold value Vth1 (step S1). When the train 1 approaches the installation position of the ground unit 4 and the reception level exceeds the first threshold value Vth1, as shown in the fluctuation characteristic diagram of the reception level in FIG. The ground element provisional detection signal is sent to the ground element information selection unit 10 after determination. When the ground child temporary detection signal is sent, the ground child information selection unit 10 acquires the ground child information from the received signal of the transmission / reception unit 8, stores it as ground child temporary detection information, and holds it (step S2). In addition, when the speed of the train 1 is detected by the time for traveling the two ground elements 4 or when the control for correcting the traveling position of the train 1 by the time at which the ground element 4 is installed and the time at which the ground element 4 is detected, A control timer value is set according to the time when the reception level exceeds the first threshold value Vth1. In this state, the reception level determination unit 9 determines whether the reception signal of the transmission / reception unit 8 has exceeded the second threshold value Vth2 and whether it has fallen below the first threshold value Vth1 (steps S3 and S4). If the reception level falls below the first threshold value Vth1 before the reception level exceeds the second threshold value Vth2, the reception level determination unit 9 cancels the ground child temporary detection signal sent to the ground child information selection unit 10. When the ground child temporary detection signal is canceled, the ground child information selection unit 10 discards the stored ground child temporary detection information (step S5). The set timer value is also cleared.

  Further, when the train 1 travels and the reception level of the reception signal transmitted from the transmission / reception unit 8 exceeds the first threshold value Vth1 (step S1), the reception level determination unit 9 determines that the ground child provisional detection is performed and determines the ground child provisional detection. A detection signal is sent to the ground unit information selection unit 10. When the ground child temporary detection signal is sent, the ground child information selection unit 10 reads the ground child information from the received signal of the transmission / reception unit 8 and temporarily stores it as ground child temporary detection information (step S2). In this state, the reception level determination unit 9 determines whether the reception level of the reception signal of the transmission / reception unit 8 exceeds the second threshold value Vth2 and below the first threshold value Vth1 (steps S3 and S4). When the threshold value Vth2 is exceeded, it is determined that the ground child detection is confirmed, and a ground child detection confirmation signal is sent to the ground child information selection unit 10. When a ground element detection confirmation signal is sent, the ground element information selection unit 10 determines the stored ground element temporary detection information as ground element information, and determines the determined ground element information and the ground element information included in the received signal of the transmission / reception unit 8. Obtained and sent to the processing unit 6 (steps S3 and S6). The processing unit 6 generates a speed pattern of the train 1 with reference to the transmitted ground information, and the control unit 7 controls the speed of the train 1 based on the speed pattern generated by the processing unit 7.

  In this state, the reception level determination unit 9 determines whether or not the reception level of the reception signal of the transmission / reception unit 8 is lower than the second threshold value Vth2 and the first threshold value Vth1 (steps S7 and S8), and the reception level becomes the second threshold value Vth2. When the value falls below the first threshold value Vth1, the signal indicating that the ground piece detection range has been lost is sent to the ground piece information selection unit 10. When the signal indicating that the ground element detection range has passed the ground element detection range is sent, the ground element information selection unit 10 ends the reception of the ground element information (step S9). This process is repeated while the train 1 travels and the on-board device 2 is driven (steps S10, S1 to S9).

  As described above, the ground level detection range is determined by determining the reception level based on the first threshold value Vth1 for ground level detection and the second threshold value Vth2 that is larger than the first threshold level Vth1 by a predetermined level. As shown in FIG. 4, the distance between the vehicle upper element 11 and the ground element 4 and the positional relationship between the left and right sides vary, so that the ground element can be received even if the reception level of the received signal of the transmission / reception unit 8 partially falls below the threshold value. 4 false detection can be prevented.

  Further, even if the reception level as a whole decreases, when the reception level exceeds the first threshold value Vth1 and then exceeds the second threshold value Vth2, the ground child temporary stored when the reception level exceeds the first threshold value Vth1 is stored. By determining the detection information as ground element information, the ground element detection range does not become extremely narrow, and the ground element 4 can be reliably detected even when the train 1 travels at a high speed.

  Furthermore, since the ground element 4 can be reliably detected, it is possible to loosen the standard of work for managing the distance between the vehicle upper element 11 and the ground element 4 and the variation in the positional relationship between the left and right within a certain range, which is inferior. Even if it is an environmental route, an ATS device or the like can be installed, and the train 1 can be run safely.

It is a block diagram which shows the structure of the train control apparatus which has the ground element detection apparatus of this invention. It is a block diagram which shows the structure of a vehicle-mounted apparatus. It is a flowchart which shows a process when detecting a ground element and selecting ground element information. It is a reception level change figure which shows the ground child detection range by a 1st threshold value and a 2nd threshold value. It is a reception level change figure which shows the ground element detection range by the conventional threshold value. It is a reception level change figure which shows the ground element detection range by the conventional threshold when a reception level falls extremely far from a threshold partially. It is a reception level change figure which shows the ground child detection range when making the conventional threshold value high.

Explanation of symbols

1; train, 2; on-vehicle device, 3; rail, 4; ground element, 5; ground element detector,
6; processing unit, 7; control unit, 8; transmission / reception unit, 9; reception level determination unit,
10: Ground child information selection part, 11: Car upper child.

Claims (2)

A transmission / reception unit, a reception level determination unit, and a ground unit information selection unit;
The transmission / reception unit receives information from the ground unit used for various controls of the train through the vehicle unit mounted on the train,
The reception level determination unit is set in advance with a first threshold value for ground detection and a second threshold value that is larger than the first threshold value by a predetermined level, and the reception level of the reception signal sent from the transmission / reception unit exceeds the first threshold value. A ground ground provisional detection signal is sent to the ground ground information selection section, and if the reception level falls below the first threshold before exceeding the second threshold after exceeding the first threshold, it is sent to the ground ground information selection section. Cancel the ground element temporary detection signal, and when the reception level exceeds the first threshold and then exceeds the second threshold, the ground element detection confirmation signal is sent to the ground element information selection unit,
The ground unit information selection unit, when a ground unit provisional detection signal is sent from the reception level determination unit, acquires ground unit information from the reception signal of the transmission / reception unit, stores it as ground unit provisional detection information and holds it, When the ground child temporary detection signal is canceled, the stored ground child temporary detection information is discarded, and when the ground child detection confirmation signal is sent, the stored ground child temporary detection information is confirmed as ground child information and the ground child detection confirmation signal is displayed. While being sent, ground unit information is acquired from the received signal of the said transmission / reception part, The ground unit detection apparatus characterized by the above-mentioned.   A train control device comprising the ground element detection device according to claim 1.

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