JP5455960B2 - Train position detection device - Google Patents

Description

  The present invention relates to a train position detection device that detects whether or not a train is present within a fixed position determination range of a station, and particularly relates to an improvement in detection accuracy.

  The train control system uses an automatic train control device (hereinafter referred to as an ATC device) and an automatic train operation control device (hereinafter referred to as an ATO device) to automate driving operations and improve safety. In the driving method using the ATC device, the ATC signal sent from the ATC ground device to the ATC loop provided for each block section along the track circuit or track is received by the power receiver or ATC antenna provided in the head vehicle of the train. The train speed is automatically controlled below the speed limit based on the received ATC signal. In recent years, a digital ATC device capable of transmitting a large amount of information has been adopted as the ATC device. By adopting this digital ATC device, multiple indications and multiple functions can be realized, and functions other than speed control can be realized.

  In addition, by adopting a digital ATO device that automatically controls the operation of trains such as constant speed control, fixed position stop, and door opening / closing, multi-functionality is possible, and functions other than speed control are realized. It is possible. In order to stop the train at a fixed position, a train position detection device using a transponder is disclosed in Patent Literature 1, Patent Literature 2, Patent Literature 3, and the like.

  The train position detection device disclosed in Patent Literature 1 receives a power wave receiving antenna coil for short position determination and a power wave receiving antenna for just position determination along the traveling direction of the train separately from the information wave receiving antenna coil. Three power wave receiving antenna coils, an antenna coil and an over position determination power wave receiving antenna coil, are arranged, and the reception level when each power wave receiving antenna coil receives a power wave transmitted from the vehicle top is a threshold value. The train's stop position is determined based on whether or not it exceeds, and if only the reception level of the power wave receiving antenna coil for short position determination exceeds the threshold value, it is determined that the train is in the short position and for the just position determination. When only the reception level of the power wave receiving antenna coil exceeds the threshold, it is determined that the train is in the just position, and for over position determination. If only reception level of force wave receiving antenna coil exceeds a threshold value, the train is determined to be in the over position.

  Moreover, the train position detection apparatus shown in Patent Document 2 does not determine the stop position of the train based on whether the reception level of the three power wave receiving antenna coils exceeds the threshold value, Three power wave receiving antenna coils having a constant power wave receiving response characteristic are arranged along the traveling direction of the train, and as shown in FIG. 4, the power wave receiving response characteristic of the power wave receiving antenna coil for short position determination is arranged. The intersection A of the power wave reception responsive characteristic Lb of the power wave reception antenna coil for La and the just position determination, the power wave reception response characteristic Lb of the power wave reception antenna coil for the just position determination, and the power wave reception for the over position determination The reception level of the power wave transmitted by the vehicle upper element is within a range where the vehicle upper arm can normally occur, with the position between the intersection B of the power wave reception responsive characteristic Lc of the antenna coil as the fixed position determination range Physical, electrical, even if changed, the distance variation between the two points of intersection are to improve the determination accuracy of the position determination range by utilizing the extremely small compared to the position determination range.

  The train position detection device disclosed in Patent Literature 3 detects a control information information wave from a vehicle upper body and detects a control information information wave in order to avoid separately transmitting a power wave for position detection. As an information wave for use, the intersection of the response characteristics of the antenna coil for short position determination and the antenna coil for just position determination, and the intersection of the response characteristics of the antenna coil for just position determination and the antenna coil for over position determination The interval is the fixed position determination range.

  As shown in Patent Document 2, when the fixed position determination range is detected by detecting the intersection of the reception levels of the three power wave receiving antenna coils, the three power wave receiving antenna coils are used by the connected receiving circuits, respectively. The condition is that an intersection point on the power wave reception response characteristic should be formed with a reception sensitivity or higher considering the noise level under electromagnetic environment conditions.

  Further, in order to ensure that the three power wave receiving antenna coils have as independent electrical performance as possible with respect to the vehicle upper arm, it is necessary to suppress the influence of mutual induction. Need to be physically separated. By physically separating the three power wave receiving antenna coils in this way, the intersection on the power wave receiving response characteristics approaches the receiving sensitivity of the receiving circuit connected to each power wave receiving antenna coil, and the point control system Has a large inclination on the power wave reception response characteristic, that is, a range in which a change in distance with respect to a change in power wave reception level is small, has a problem that the adjustment range of the fixed position determination range becomes narrow.

  Also, in this situation, the adjustment range on the level diagram due to the difference between the electromagnetic environment conditions at the development stage close to free space and the actual electromagnetic environment conditions or the difference in the cable length of the ground element becomes narrow as the electromagnetic environment conditions. Accordingly, in a system in which multiple units are installed, it is necessary to increase the number of types according to the electromagnetic environment conditions where the ground unit is installed or the cable length of the ground unit.

  Further, as shown in Patent Document 3, when an information wave for control information is shared as an information wave for vehicle detection, the information wave uses a frequency 10 times higher than that of a power wave, and transmission power The transmission power wave is regulated because there is little margin for the regulations of the Radio Law, and considering the noise level in the applicable electromagnetic environment, it is more than the reception sensitivity that secures the S / N necessary to ensure the transmission quality in the receiver. The level change in the reception response characteristic of the information wave accompanying the movement of the vehicle upper body is limited. In order to realize intersection detection of physically separated antenna coils within this limited narrow level change, the antenna coils must be arranged close to each other. Thus, it is necessary to consider the influence of the antenna coils arranged close to each other by mutual induction including the vehicle upper element, and also consider the influence of side lobes. Therefore, as shown in Patent Document 3, it cannot be adapted to a system configuration on the precondition that a physically separated information receiving antenna coil has an electrically independent reception response characteristic.

  Also, since the intersection on the reception response characteristic of the information wave is lower than the peak level on the reception response characteristic, the ground element and the vehicle element are near the intersection of the information wave where the difference between the reception sensitivity and the peak level is small. There is a problem that it is difficult to secure S / N for ensuring the necessary transmission quality for the information transmission performed during the combination.

  The present invention solves such a problem, and can easily set a fixed position determination range for detecting whether or not a train is present at a fixed position of a station, and the train is positioned at a fixed position determination range. It is an object of the present invention to provide a train position detection device that can detect whether or not the vehicle is in high accuracy.

  The train position detection device of the present invention is a train position detection device having a ground element and a ground device using a transponder that receives a power wave transmitted from a vehicle upper element mounted on a train, wherein the ground element is A first power wave receiving antenna coil having a certain length along the rail, disposed at a stop position of the train at the station, and receiving a power wave transmitted from the vehicle upper element; and the first power wave A second power wave receiving antenna disposed adjacent to the first power wave receiving antenna coil at a position before the train traveling of the receiving antenna coil and receiving a power wave transmitted from the vehicle upper element. The coil and the first power wave receiving antenna coil are disposed adjacent to the first power wave receiving antenna coil at a position in front of the train traveling and receive the power wave transmitted from the vehicle upper element. The third power to A ground wave reception antenna coil, the ground device includes a power wave reception unit and a position determination unit, and the power wave reception unit detects a power wave received by the first power wave reception antenna coil. A first receiving section for outputting; a second receiving section for detecting and outputting a power wave received by the second power wave receiving antenna coil; and a power wave received by the third power wave receiving antenna coil. A third reception unit for detecting and outputting the first reception level variable means, the second reception level variable means, the first level comparator, the second level comparator, and the logic And the first reception level varying means adjusts the power wave reception response characteristic of the detection output of the second reception unit in the vertical direction and outputs it to the first level comparator, the second level comparator The reception level variable means is the above-mentioned 3, the power wave reception response characteristic of the detection output of the receiving unit 3 is adjusted in the vertical direction and output to the second level comparator, and the first level comparator is output from the first reception level varying means. A position where the power wave reception responsive characteristic and the power wave reception responsive characteristic of the detection output output from the first receiving unit coincide with each other is detected and output to the logic unit, and the second level comparator includes the second level comparator. Detecting the position where the power wave reception responsive characteristic output from the reception level variable means coincides with the power wave reception responsive characteristic of the detection output output from the first receiver, and outputs the detected position to the logic unit. The train trains between a position where the power wave reception responsive characteristics output from the first level comparator match and a position where the power wave reception responsive characteristics output from the second level comparator match. Is determined to be in the fixed position determination range.

  The present invention outputs a power wave reception responsive characteristic that intersects with a power wave reception responsive characteristic output from a first power wave receiving antenna coil disposed at a stop position of a train of a station via a first receiver. The power wave receiving response characteristics output from the second power wave receiving antenna coil, the second receiving unit, and the third power wave receiving antenna coil and the third receiving unit are variably adjusted in the vertical direction to adjust the fixed position determination range. By making the adjustment possible, when the readjustment is performed on site after installing the equipment at a plurality of different stations, the home position determination range can be easily adjusted, and the field work can be reduced. In addition, by performing maintenance and management of the electrical performance of only the ground device, the stop position of the train can be detected with high detection accuracy.

It is a block diagram which shows the structure of the train position detection apparatus of this invention. It is a block diagram which shows the structure of the electric power wave receiving part and position determination part of a transponder ground apparatus. It is a schematic diagram which shows the change of the reception level of the power wave receiving antenna coil which has in a ground unit. It is a schematic diagram which shows the change of the reception level of the power wave receiving antenna coil which has the conventional ground element.

  FIG. 1 is a block diagram showing the configuration of the train position detecting apparatus of the present invention. As shown in FIG. 1, the train position detecting device includes a transponder onboard device 1 and an onboard child 2 mounted on a train, a ground unit 3 and a transponder grounding device 4 provided at a train stop position on the ground. The vehicle upper 2 includes an information wave transmitting antenna coil 5, a power wave transmitting antenna coil 6, and an information wave receiving antenna coil 7. The information wave transmitting antenna coil 5 transmits an information wave having on-board information sent from the transponder on-board device 1 to the ground unit 3. The power wave transmitting antenna coil 6 transmits the power wave transmitted from the transponder onboard device 1 to the ground unit 3. The information wave receiving antenna coil 7 sends an information wave having ground information transmitted from the ground element 3 to the transponder on-board device 1.

  The ground element 3 is arranged along the information wave receiving antenna coil 8, the information wave transmitting antenna coil 9, and the traveling direction of the train, and electric power for determining that the train is in a position before the predetermined stop position (short position). A wave receiving antenna coil 10a, a power wave receiving antenna coil 10b having a predetermined length for determining that the train is at a predetermined fixed position (just position), and a position where the train exceeds a predetermined fixed position (over position) ) Has a power wave receiving antenna coil 10c for determining the presence of the antenna. The information wave receiving antenna coil 8 receives the information wave having on-vehicle information transmitted from the vehicle upper element 2 and sends it to the transponder ground device 4. The information wave transmitting antenna coil 9 transmits an information wave having ground information sent from the transponder ground device 4 to the vehicle upper element 2. The three power wave receiving antenna coils 10a, 10b, and 10c each receive a power wave transmitted from the vehicle upper element 2 and send it to the transponder ground device 4.

  The transponder ground device 4 includes an on-vehicle information reception unit 11, a ground information transmission unit 12, a power wave reception unit 13, and a position determination unit 14. The on-board information receiving unit 11 demodulates the information wave received by the information wave receiving antenna coil 8 of the ground unit 3 and outputs the demodulated on-board information to the station control device 15. The ground information transmission unit 12 modulates the ground information output from the station control device 15 and the position information input from the position determination unit 14, and transmits the modulated information wave from the information wave transmission antenna coil 9 to the vehicle upper element 2.

  As shown in the block diagram of FIG. 2, the power wave receiver 13 includes a short position receiver 16a, a just position receiver 16b, and an over position receiver 16c. As shown in FIG. 3, the short position receiving unit 16a performs processing such as detection of the power wave received by the power wave receiving antenna coil 10a and outputs a detection output of the power wave reception responsive characteristic of the short position detecting antenna coil 10a. The reception level La adjusted to an appropriate level by taking S / N into consideration is output to the position determination unit 14. The just position receiving unit 16b processes the power wave received by the power wave receiving antenna coil 10b and adjusts the detection output of the power wave receiving response characteristic of the just position detecting antenna coil 10b to an appropriate level by taking S / N into consideration. The received reception level Lb is output to the position determination unit 14. The over-position receiving unit 16c processes the power wave received by the power-wave receiving antenna coil 10c, and adjusts the detection output of the power-wave reception response characteristic of the over-position detecting antenna coil 10c to an appropriate level by taking S / N into consideration. The received reception level Lc is output to the position determination unit 14. 3, the reception level Lsa indicates the reception sensitivity of the power wave reception antenna coil 10a, the reception level Lsb indicates the reception sensitivity of the power wave reception antenna coil 10b, and the reception level Lsc is The receiving sensitivity of the power wave receiving antenna coil 10c is shown. The reception level Li indicates the reception level of the information wave reception antenna 8. The reception level Lb of the power wave receiving antenna coil 10b for determining that the train is in the just position is the reception level La of the power wave receiving antenna coil 10a for determining the short position and the power wave receiving antenna coil for determining the over position. The reception sensitivity is set and the necessary gain adjustment is performed so as to cross the reception level Lc of 10c.

  The position determination unit 14 includes two adder circuits 17 a and 17 b, two level comparators 18 a and 18 b, and a logic unit 19. As shown in FIG. 3, the adder circuit 17a has a power for determining the short position with respect to the power wave reception responsive characteristic of the detection output of the power wave reception antenna coil 10b for determining that the train is in the just position. The power wave reception response characteristics of the detection outputs of the wave reception antenna coil 10a and the short position reception unit 16a are adjusted in the vertical direction. The adder circuit 17b detects the power wave receiving antenna coil 10c and the over position receiving unit 16c for determining the over position with respect to the power wave receiving response characteristic of the power wave receiving antenna coil 10b for determining that it is in the just position. Adjust the output power wave response characteristics in the vertical direction. By adjusting the power wave reception responsive characteristic in the vertical direction with the two adder circuits 17a and 17b, as shown in FIG. 3, a short circuit is achieved with respect to the reception level Lb of the power wave reception antenna coil 10b for the just position. The reception level La of the power wave reception antenna coil 10a for position is moved up and down like the reception level La1 or reception level La2, and the reception level Lc of the power wave reception antenna coil 10c for over position is changed to the reception level Lc1 or reception level. The fixed position determination range is adjusted by moving up and down like Lc2.

  The level comparator 18a receives the reception level La output via the detection output adding circuit 17a of the short position receiving unit 16a or the reception level La1 or the reception level La2 moved up and down the detection output and the just position receiving unit 16b. The reception level Lb is compared, the intersection level A where the reception level La or the reception level La1 or the reception level La2 moved up and down coincides with the reception level Lb is detected, and a detection signal at the intersection A is output to the logic unit 19. The level comparator 18b determines the magnitude of the reception level Lb input from the just position reception unit 16b and the reception level Lc via the detection output addition circuit 17b of the over position reception unit 16c, or the reception level Lc1 or reception level Lc2 moved up and down. In comparison, the reception level Lb or the reception level Lc1 moved up and down or the intersection B where the reception level Lc matches the reception level Lc is detected, and a detection signal of the intersection B is output to the logic unit 19. The logic unit 19 determines that the train is in the fixed position determination range between the detection signal at the intersection A input from the level comparator 18a and the detection signal at the intersection B input from the level comparator 18b.

  The operation when the train position is detected by this train position detection device will be described. When the train travels and the vehicle upper 2 is electromagnetically coupled to the ground child 3 and the power wave transmitted from the vehicle upper 2 is received by the power wave receiving antenna coil 10a, the detection output of the short position receiver 16a is the position. The signal is input to the logic unit 19 and the level comparator 18a as the reception level La1 or the reception level La2 adjusted in the vertical direction of the reception level La or the power wave reception response characteristic via the addition circuit 17a of the determination unit 14. The logic unit 19 determines that the train is in the short position when any one of the reception level La, the reception level La1, and the reception level La2 is input, and controls the station position information indicating the short position presence line. Output to the device 15. When the station control device 15 inputs information indicating the short position existing line, the station control device 15 outputs information indicating the short position existing line to the ground information transmitting unit 12. The ground information transmission unit 12 transmits information indicating the input short position location line from the ground element 3 to the vehicle upper element 2.

  In addition, after the reception level La is input to the logic unit 19, the power wave transmitted from the vehicle upper body 2 is received by the power wave receiving antenna coil 10b, and the reception level Lb is received from the just position reception unit 16b. 19 and the level comparator 18a, when the detection signal of the intersection A is input from the level comparator 18a to the logic unit 19, the logic unit 19 determines that the train has entered the fixed position determination range.

  When the reception level Lb is continuously input after the detection signal of the intersection A is input from the comparator 18a to the logic unit 19, the logic unit 19 indicates that the train is at the just position. Information is output to the station controller 15. The station control device 15 outputs the input information indicating the just-positioned line to the ground information transmission unit 12. The ground information transmission unit 12 transmits information indicating the input just position presence line from the ground element 3 to the vehicle upper element 2 and controls the operation of the platform door control device and the like.

  When the logic unit 19 determines that the train has entered the fixed position determination range, and subsequently receives the power wave transmitted from the vehicle upper 2 by the power wave receiving antenna coil 10c, the over position receiving unit 16c detects the power wave. The output is logically processed by the logic unit 19 and the level comparator 18b as the reception level Lc1 or the reception level Lc2 adjusted in the vertical direction of the reception level Lc or the power wave reception response characteristic via the addition circuit 17b of the position determination unit 14. When the detection signal of the intersection B is input from the level comparator 18b to the unit 19, the logic unit 19 determines that the train has advanced from the fixed position determination range, and outputs information indicating the entry of the over position to the station control device 15. The station control device 15 outputs the input information indicating the approach to the over position to the ground information transmission unit 12. The ground information transmission unit 12 transmits the input information indicating the approach to the over position from the ground element 3 to the vehicle upper element 2.

  In this way, the logic unit 19 sets the fixed position determination range between the detection signal at the intersection A input from the level comparator 18a and the detection signal at the intersection B input from the level comparator 18b. That is, as shown in FIG. 3, the fixed position determination range a of the power wave detection outputs La, Lb, Lc received by the power wave receiving antenna coils 10a, 10b, 10c of the ground unit 3 without the adder circuits 17a, 17b. On the other hand, the reception level La of the detection output of the short position receiving unit 16a via the addition circuit 17a can be adjusted in the vertical direction of the power wave reception response characteristics of the reception level La1 and the reception level La2 by adjusting the addition circuit 17a. become. Similarly, the reception level Lc of the detection output of the over-position receiving unit 16c via the addition circuit 17b can be adjusted in the vertical direction of the power wave reception response characteristics of the reception level Lc1 and the reception level Lc2 by adjusting the addition circuit 17b. Become. Therefore, the fixed position determination range a can be adjusted to the fixed position determination range b and fixed position determination range c.

  When the ground element 3 and the transponder ground apparatus 4 of this train position detecting device are applied to a plurality of different stations, the cable length connecting the ground element 3 and the transponder ground apparatus 4 is not constant, and readjustment is performed on site after the equipment is installed. Is generally performed. In such a case, addition circuits 17a and 17b capable of adjusting the power wave reception response characteristic up and down are provided in the detection output of the short position reception unit 16a and the detection output of the over position reception unit 16c, and the addition circuit 17a for short position determination is provided. The position of the intersection A where the reception level Lai adjusted in step 1 and the reception level Lb of the just position receiving unit 16b coincide with each other is adjusted, and the reception level Lb of the just position receiving unit 16b and the addition circuit 17b for over-position determination are adjusted. By adjusting the position of the intersection B where the reception levels Lci coincide with each other, the home position determination range can be easily adjusted, and field work can be reduced.

1; transponder on-board device, 2;
4; transponder ground device, 5; information wave transmitting antenna coil,
6; power wave transmitting antenna coil, 7; information wave receiving antenna coil,
8; Information wave receiving antenna coil, 9; Information wave transmitting antenna coil,
10; Power wave receiving antenna coil; 11; On-board information receiving unit; 12; Ground information transmitting unit;
13; Power wave receiving unit; 14; Position determining unit; 15; Station control device;
16a; short position receiving unit, 16b; just position receiving unit,
16c; over-position receiving unit, 17; adding circuit, 18; level comparator,
19; Logic part

Japanese Patent Laid-Open No. 10-264814 JP-A-60-191870 Japanese Patent Laid-Open No. 9-226581

Claims (1)

A train position detection device having a ground element and a ground device using a transponder that receives a power wave transmitted from a vehicle upper element mounted on a train,
The ground element has a certain length along a rail, is disposed at a stop position of a train at a station, and receives a power wave transmitted from the vehicle element, and a first power wave receiving antenna coil, A second power wave is disposed adjacent to the first power wave receiving antenna coil at a position before the train traveling of the first power wave receiving antenna coil, and receives a power wave transmitted from the vehicle upper element. The power wave receiving antenna coil and the first power wave receiving antenna coil are disposed adjacent to the first power wave receiving antenna coil at a position in front of the train traveling and transmitted from the vehicle upper element. A third power wave receiving antenna coil for receiving the received power wave;
The ground device has a power wave reception unit and a position determination unit,
The power wave receiving unit detects a power wave received by the first power wave receiving antenna coil and outputs a power wave received by the second power wave receiving antenna coil. And a second receiving unit for outputting and a third receiving unit for detecting and outputting the power wave received by the third power wave receiving antenna coil,
The position determination unit includes a first reception level varying unit, a second reception level varying unit, a first level comparator, a second level comparator, and a logic unit, and the first reception level varying unit includes: The power wave reception response characteristic of the detection output of the second reception unit is adjusted in the vertical direction and is output to the first level comparator, and the second reception level varying means is configured to detect the third reception unit. The output power wave reception response characteristic is adjusted in the vertical direction and is output to the second level comparator, and the first level comparator has a power wave reception response characteristic output from the first reception level variable means. A position at which the power wave reception responsive characteristics of the detection output output from the first receiving unit coincide with each other is detected and output to the logic unit, and the second level comparator includes the second reception level changing means. Detecting the position where the power wave reception responsive characteristic output from the first reception unit matches the power wave reception responsive characteristic of the detection output output from the first reception unit, and outputs the detected position to the logic unit. The train is located in the fixed position determination range between the position where the power wave reception responsive characteristics output from the first level comparator match and the position where the power wave reception responsive characteristics output from the second level comparator match. It is determined that the train position is detected.

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