JP2014003768A - Train position detection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a train position detection system which properly detects the position of a train, prevents the occurrence of over-running or the like, and improves safety.SOLUTION: A train position detection system includes an onboard radio device 6 that is mounted on a train 2 running on a predetermined track 1 and measures a distance to a known ground device 8 by radio, and an onboard device 3 that detects the position of the train 2 on the basis of the distance measured by the onboard radio device 6. The onboard device 3 detects the position of the train 2 by using the distance to the known ground device 8 measured by the onboard radio device 6 and an installation position of the ground device 8.

Description

  The present invention relates to a train position detection system, and more particularly to a train position detection system capable of appropriately detecting the position of a train to prevent the occurrence of overrun and improve safety.

  Conventionally, a train position detection system using a so-called wireless ranging system has a train-mounted radio mounted on a train, and a plurality of trackside radios installed at predetermined intervals along the track along which the train travels. A wireless network is formed, and the train position is detected by measuring the radio propagation delay (time) between the on-board antenna of the on-board radio and the along-line antenna of the along-line radio, and the train position is detected. Train control is based on this.

  Conventionally, as a train control system using such a radio ranging system, for example, a communication system provided with a transmission / reception antenna around a track and a transmission / reception antenna on a vehicle, transmitted from a transmission / reception antenna on the ground and received. A distance measuring step for measuring the distance from the installation position of the transmission / reception antenna on the ground to the vehicle, a distance transmission step for transmitting the measurement distance from the transmission / reception antenna on the vehicle to the transmission / reception antenna on the vehicle, and reception A vehicle stop step for determining a stop pattern according to the distance to the designated stop position and the current speed according to the measured distance and the current speed of the vehicle, and controlling the braking force of the vehicle based on the stop pattern; (For example, refer to Patent Document 1).

JP 2004-224220 A

  However, in the conventional technique, when the distance is detected based on a signal received wirelessly, an error may occur in the measurement distance due to multipath or the like, and the measurement distance may be detected long. Have a problem. Therefore, depending on the measurement distance, there is a possibility of causing an overrun or a collision of the train, and there is a problem that safety cannot be ensured.

  The present invention has been made in view of the above points, and provides a train position detection system capable of appropriately detecting the position of a train and preventing the occurrence of overrun and the like to enhance safety. It is the purpose.

In order to achieve the above-mentioned object, the train position detection system according to the invention of claim 1 is an on-vehicle radio that is mounted on a train traveling on a predetermined track and wirelessly measures a distance to a known ground device. Machine,
A position detection device that detects the position of the train based on a distance measured by the on-board radio,
The position detection device detects the position of the train based on a measurement distance to the known ground device by the on-board radio and an installation position of the ground device.

The invention according to claim 2 is the invention according to claim 1, wherein the on-board wireless device performs distance measurement with respect to the ground device installed behind the train in the traveling direction,
The position detection device calculates a distance from the ground device in the forward direction of the train from a distance obtained by subtracting a distance measured by the onboard radio from the distance between the ground devices in the forward and backward directions of the train. And detecting the position of the train.

The invention according to claim 3 further comprises a speed detection device for detecting the speed of the train according to claim 1,
The on-board radio performs distance measurement with respect to the ground device ahead of the traveling direction of the train, and performs distance measurement with respect to the ground device after a predetermined time,
The position detection device has a short distance among a distance calculated by reflecting the distance advanced for the predetermined time by the detection speed by the speed detection device and a measurement distance after the predetermined time. Based on this, the position of the train is detected.

According to a fourth aspect of the present invention, in the first aspect, the on-board wireless device performs distance measurement with respect to the ground device in front and rear in the traveling direction of the train,
The position detecting device detects the position of a train from a range in which the distances obtained by adding the train volume growth to the measurement distances overlap each other.

According to a fifth aspect of the present invention, in the first aspect, the on-board wireless device performs distance measurement with respect to the ground device in front and rear in the traveling direction of the train,
The position detection device detects the position of a train from a range where the distances overlap each other by adding the distance from the onboard radio to the tail and the head of the train.

  According to a sixth aspect of the present invention, the position detection device according to any one of the first to fifth aspects, wherein the train is based on a measurement distance to the known ground device and an installation position of the ground device. The train existence range is obtained, and the position of the train is detected based on the train existence range.

  The invention according to claim 7 is characterized in that, in claim 6, the train existence range is set so as to include an actual existence range of the train.

  According to an eighth aspect of the present invention, in the sixth or seventh aspect, the position detecting device determines that the train has started to pass the predetermined position because the train existence range of the train has passed the predetermined position. The train existence range of the train has been determined to be determined to have passed the predetermined position when it has passed the predetermined position.

The invention according to a ninth aspect is the vehicle according to any one of the first, seventh, and eighth aspects, wherein the on-board wireless device continuously measures the distance to the ground device in the traveling direction of the train. Done
The position detection device detects that the train is located on the ground device when distance measurement by the on-board wireless device becomes impossible.

  According to the invention according to claim 1, the position detection device detects the position of the train using the measurement distance to the known ground device by the on-board radio and the installation position of the ground device. The position of the train can be detected appropriately, the occurrence of a train collision or an overrun can be reliably prevented, and the traveling safety of the train can be significantly increased.

  According to the invention which concerns on Claim 2, distance measurement with respect to the ground device installed in the advancing direction of the train is performed by the on-board radio, and the distance between the ground devices in the advancing direction and the back of the train is determined by the position detection device. Since the distance from the ground device in the forward direction of the train is calculated from the distance obtained by subtracting the distance measured by the onboard radio from the vehicle, the position of the train is detected. Even if it is detected longer than this distance, the distance to the front ground radio can be detected relatively short, and it is possible to reliably prevent the occurrence of train collisions and overruns. The safety of train travel can be significantly increased.

  According to the invention of claim 3, the distance to the ground device ahead of the traveling direction of the train is measured by the on-board wireless device, the distance to the ground device after a predetermined time is measured, and the position detector first The position of the train is detected based on a short distance among the distance calculated by reflecting the distance advanced for a predetermined time by the detection speed by the speed detection device and the measured distance after the predetermined time. Therefore, even if the distance measurement by radio is detected longer than the actual distance, the train position can be detected based on the smaller measurement distance to the front ground radio, and the collision of the train And overruns can be reliably prevented, and the safety of train travel can be significantly increased.

  According to the invention which concerns on Claim 4, it measures distance with respect to the ground apparatus of the advancing direction front and back of a train with an on-board radio, and each distance which added train length to each measured distance with a position detection apparatus, respectively. Since the train position is detected from the overlapping range, even if the distance measurement by wireless is detected longer than the actual distance, the train position can be detected in a wide range. The occurrence of collisions and overruns can be reliably prevented, and the safety of train travel can be significantly increased.

  According to the invention which concerns on Claim 5, distance measurement with respect to the ground apparatus of the advancing direction of a train and the back is performed with an on-board radio, and the end of a train is each at each measurement distance by a position detection apparatus. Since the overlapping range of each distance including the distance to the tail and the head is detected as the train position, even if the distance measurement by radio is detected longer than the actual distance, a wide range The position of the train can be detected by this, the occurrence of a train collision or overrun can be reliably prevented, and the traveling safety of the train can be remarkably enhanced.

  According to the invention of claim 6, the position detection device obtains the train presence range of the train based on the known measurement distance to the ground device and the installation position of the ground device, and based on the train presence range, Since the position is detected, even if the distance measurement by radio is detected longer than the actual distance, the obtained train existence range becomes a larger value than the actual train existence range, and the wide range The position of the train can be detected by this, the occurrence of a train collision or overrun can be reliably prevented, and the traveling safety of the train can be remarkably enhanced.

  According to the invention of claim 7, since the train existence range is set so as to include the actual existence range of the train, the position of the train can be properly detected, and the train position can be detected in a wide range. Can be reliably detected, and the occurrence of train collisions and overruns can be reliably prevented, and the safety of train travel can be significantly improved.

  According to the invention which concerns on Claim 8, it determines with the train presence range of the said train having started passing the predetermined position because the train presence range of the said train passed the predetermined position, and the train presence range of the said train is determined. Since it is determined that the train has passed the predetermined position when it has passed the predetermined position, the position of the train can be detected properly, and the occurrence of a collision or overrun can be ensured. Can be prevented, and the safety of train travel can be significantly increased.

  According to the invention according to claim 9, the on-board radio continuously performs distance measurement with respect to the ground device ahead of the traveling direction of the train, and the position detection device continuously reduces the measurement distance by the on-board radio, When it becomes impossible to measure the distance by the on-board radio, it is detected that the train is located on the ground device, so the train position can be detected properly, such as a train collision or overrun Can be reliably prevented, and the traveling safety of the train can be significantly increased.

It is a schematic block diagram which shows the train part in 1st Embodiment of the train position detection system which concerns on this invention. It is explanatory drawing which shows the train position detection means in 1st Embodiment of the train position detection system which concerns on this invention. It is explanatory drawing which shows the train position detection means in 2nd Embodiment of the train position detection system which concerns on this invention. It is explanatory drawing which shows the train position detection means in 3rd Embodiment of the train position detection system which concerns on this invention. It is explanatory drawing which shows the modification of the train position detection means in 3rd Embodiment of the train position detection system which concerns on this invention. It is explanatory drawing which shows the modification of the train position detection means in 3rd Embodiment of the train position detection system which concerns on this invention. It is explanatory drawing which shows the modification of the train position detection means in 3rd Embodiment of the train position detection system which concerns on this invention. It is explanatory drawing which shows the example of the passage determination means of the ground radio in the train position detection system which concerns on this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic configuration diagram showing a first embodiment of a train position detection system according to the present invention. In this embodiment, an on-board device 3 is mounted on a train 2 traveling on a predetermined track 1. Has been. The on-board device 3 includes an on-board processing unit 4 configured mainly with a CPU, and is configured to perform various controls such as speed control and braking control of the train 2. The train 2 is equipped with a tacho generator 5 as a speed detecting device for detecting the speed of the train 2 on the basis of the rotational speed of the wheels of the train 2. It is configured to be sent to the device 3.

  The train 2 is equipped with an on-board radio device 6 connected to the on-board device 3, and a plurality of units for transmitting and receiving information to and from the on-board radio device 6 on the track 1 of the train 2. Terrestrial radio devices 7 are installed at predetermined intervals. The ground radio devices 7 are configured to transmit and receive information to and from the on-board radio device 6 of the train 2 traveling on the track 1. In addition, a ground device 8 is connected to each terrestrial radio device 7, and a central device 9 that performs operation management along the train 2 is connected to each ground device 8.

  The on-board processing unit 4 of each on-board device 3 is configured to function as a train position detection device, and the on-board processing unit 4 communicates between the ground radio device 7 and the on-board radio device 6. The distance between the ground radio 7 and the train 2 is calculated by measuring the radio wave propagation time when the train 2 is performed, and the position where the train 2 exists is detected. Then, the on-board device 3 generates a speed pattern according to the braking performance of the own train 2 based on the information on the speed limit and the travelable distance based on the position information of the train 2, and performs the traveling control of the train 2 according to the speed pattern. Configured to do. In the present embodiment, the train position detection device is shown as being included in the on-board device 3, but the train position detection device may be installed on the ground. Information used for detection may be transmitted to a ground position detection device by transmission means such as wireless communication.

  Further, in the present embodiment, as shown in FIG. 2, the on-board wireless device 6 is configured to perform distance measurement with the ground wireless device 7 located rearward with respect to the traveling direction of the train 2. The on-board device 3 is obtained by subtracting the measurement distance Ld measured by the on-board radio 6 from the distance between the ground devices 8 respectively installed in front and rear of the traveling direction of the train 2. The position of the train 2 is detected by calculating the distance to the ground device 8 in the forward direction. That is, the installation position of the ground device 8 is known, and the distance between each ground device 8 is also known. When the distance measurement by radio is performed, the measurement distance Ld may be detected longer than the actual distance Lt. Therefore, the measurement distance from the known distance between the ground devices 8 to the rear ground radio device 7 is calculated. By subtracting, the distance to the front ground radio 7 is detected relatively short. Therefore, when the distance measurement is performed wirelessly, it is detected that the position of the train 2 is ahead of the actual position. For example, another train 2 or a station located in front of the traveling direction of the train 2 or the like Therefore, safety can be improved.

  Next, the control operation of this embodiment will be described.

  First, radio wave propagation time when communication is performed between the terrestrial radio device 7 and the on-board radio device 6 located behind the traveling direction of the train 2 and the terrestrial radio device 7 and the on-board radio device 6 are communicated. Is calculated, the distance between the ground radio 7 and the train 2 is calculated. Then, the on-board device 3 forwards the train 2 in the traveling direction from the distance obtained by subtracting the distance measured by the on-board radio 6 from the distance between the ground devices 8 respectively installed in the forward and backward directions of the train 2. The position of the train 2 is detected by calculating the distance to the ground device 8 (for example, detected from the distance to the ground device 8 and the geographical information of the track alignment).

  Then, the detected position of the train 2 is sent to the ground device 8 via the on-board radio device 6 and the ground radio device 7, and the on-board device 3 determines the position of the train 2 based on the detected position of the train 2. A speed pattern is generated according to the brake performance, and the traveling control of the train 2 is performed according to the speed pattern.

  As described above, in the present embodiment, communication is performed between the ground radio 7 and the on-board radio 6 located behind the train 2 in the traveling direction, and the distance between the ground radio 7 and the train 2 is determined. The traveling direction of the train 2 is calculated from the distance obtained by subtracting the distance measured by the onboard radio 6 from the distance between the ground devices 8 respectively installed in front and rear of the traveling direction of the train 2. Since the position of the train 2 is detected by calculating the distance to the ground device 8 in the front, even if the distance measurement by radio is detected longer than the actual distance by multipath or the like, the front The distance to the terrestrial radio 7 can be detected relatively short, the occurrence of a collision or overrun of the train 2 can be surely prevented, and the traveling safety of the train 2 can be significantly increased. it can.

  In the present embodiment, the rearmost position of the train 2 can be calculated from the measured distance between the ground radio 7 and the onboard radio 6 located behind the train 2 in the traveling direction. If it is detected longer than the distance, it is detected with a deviation from the actual position in the traveling direction. For this reason, the train existence range may be set so as to include the calculated start position of the train 2 and the ground radio device 7 located behind the traveling direction of the train 2. The train presence range set in this way is a larger value than the actual train presence range, and it is possible to detect the position of the train 2 in a range wider than the actual train presence range. The occurrence of a collision or the like can be reliably prevented. In addition, after the train 2 travels and passes through the ground wireless device 7 positioned forward in the traveling direction, the ground wireless device 7 becomes the ground wireless device 7 positioned behind the traveling direction of the train 2, so that the train existence range What is necessary is just to make it switch to the range to the said ground radio | wireless machine 7 in the advancing direction back side.

  Next, a second embodiment of the present invention will be described with reference to FIG. The configuration of the train 2 is the same as that in FIG. 1 and will be described with reference to FIG.

  In the present embodiment, the on-board wireless device 6 is configured to perform distance measurement with the ground wireless device 7 located in the traveling direction of the train 2, and is measured with the ground wireless device 7. After a certain time has elapsed, the distance measurement is again performed with the ground radio device 7 after a certain period of time. Then, the speed of the train 2 is measured while the fixed time elapses with the tacho generator 5, and the traveling distance by the speed integration when the fixed time elapses with the measured distance measured first by the on-board processing unit 4. The distance calculated by reflection is compared with the measured distance value measured next, and the smaller value is adopted as the position of the train 2.

  That is, in the present embodiment, the distance between the ground radio 7 installed in front of the traveling direction of the train 2 and the on-board radio 6 is measured to measure the distance from the ground radio 7, and the distance value L1 Suppose that the distance measurement value L2 is obtained by performing the next distance measurement after the lapse of the predetermined time Δt. Assuming that the speed of the train 2 by the tacho generator 5 is V (a positive value when approaching the ground radio 7) during a certain period of time, the distance calculated from the speed integration is L1−VΔt, Compared with measurement distance L2 and measurement distance L1-VΔt, the smaller value is adopted as the measurement distance at that point. In the distance measurement after the next fixed time Δt elapses, the smaller measurement distance adopted may be used as the distance value L1.

  Therefore, when distance measurement is performed wirelessly, the measurement distance may be detected to be longer than the actual distance, but by adopting the smaller value of the measurement distance L2 and the measurement distance L1-VΔt, the actual distance Even when detected for a longer time, the position of the train 2 can be detected based on a small measurement distance. For example, in a state in which the distance between the train 2 and other trains 2 located in front of the train 2 is short Since it is controlled, safety can be improved.

  As described above, in the present embodiment, after obtaining the measurement distance between the ground radio 7 and the on-board radio 6 located in the traveling direction of the train 2, the ground radio is again transmitted after a predetermined time has elapsed. The distance is measured with the machine 7 and the speed of the train 2 is measured by the tacho generator 5 during a predetermined time, and the speed is integrated when the fixed time elapses at the first measured distance. The value obtained by adding the travel distance is compared with the measured distance value measured next, and the smaller value is adopted as the position of the train 2, so that the distance measurement by radio is detected longer than the actual distance. Even if there is a problem, the position of the train 2 can be detected based on the smaller measurement distance to the ground radio 7 ahead, and the occurrence of a collision or overrun of the train 2 can be reliably prevented. Can column It can significantly enhance the safety of the second travel.

  In the present embodiment, the last position of the train 2 may be calculated from the first position and train train growth. The head position at this time may be the head position obtained from the position of the train 2 adopted as described above. In this case, the tail position substantially coincides with the actual tail position of the train 2. Moreover, it is good also as a head position calculated | required from the measured distance measured between the ground radio | wireless machine 7 and the on-board radio | wireless machine 6, In this case, when distance measurement by radio | wireless may be detected longer than actual distance In this case, the calculated last position is located behind the actual last position of the train 2 in the traveling direction. The train presence range is configured to be obtained based on the head position obtained from the position of the train 2 adopted as described above and the last position calculated. In this way, if the train existence range is set so as to include the head position and the tail position, even if distance measurement by radio is detected longer than the actual distance, the obtained train existence range is Since the value is larger than the train presence range and the position of the train 2 can be detected in a wide range, the occurrence of a collision of the train 2 or an overrun can be surely prevented, and the traveling safety of the train 2 Can be significantly increased.

  Next, a third embodiment of the present invention will be described with reference to FIG. The configuration of the train 2 is the same as that in FIG. 1 and will be described with reference to FIG.

  Also in the present embodiment, as in the second embodiment, the onboard device 3 and the onboard radio device 6 are mounted on the leading and trailing vehicles of the train 2 respectively, and the onboard radio device 6 on the top of the train 2 Communicating with the ground radio 7 installed in front of the traveling direction of the train 2 to measure the distance, and by the onboard radio 6 at the rear of the train 2 installed on the rear of the traveling direction of the train 2 It is configured to perform distance measurement by communicating with the wireless device 7. And in this embodiment, while calculating | requiring the tail position of the train 2 based on the value which added the vehicle formation growth of the train 2 known to the measurement distance measured by the onboard radio | wireless machine 6 of the train 2, The head position of the train 2 is obtained based on a value obtained by adding the vehicle volume growth of the train 2 to the measurement distance measured by the last onboard radio 6 of the train 2. And it is comprised so that the train presence range of the train 2 is calculated | required based on the head position and the last position of these trains 2, and the position of the train 2 is detected based on this train presence range.

  That is, in this embodiment, when the train 2 is present between two ground devices 8 in a certain section, the train 2 is installed in front of the train 2 by the onboard radio 6 in front of the train 2. The distance measurement is performed by communicating with the terrestrial radio 7 and the measured distance Ld1 is communicated with the terrestrial radio 7 installed behind the train 2 by the onboard radio 6 at the end of the train 2. It is assumed that the distance measurement is performed and the measurement distance Ld2 is acquired. Then, the vehicle volume growth Ls of the train 2 is added to each of the measured distances Ld1 and Ld2, and the leading position and the trailing position of the train 2 are obtained. Based on the leading position and the trailing position of the train 2, the train 2 The train existence range Lds is obtained. The train existence range Lds obtained in this way is actually detected even when an error occurs in the measurement distance Ld1 and the measurement distance Ld2 when the measurement distance is detected to be longer than the actual distance when the distance is measured by radio. Therefore, the position of the train 2 can be detected in a wider range than the actual train existence range of the train 2.

  In this case, the measurement distance acquired by communicating with the ground radio device 7 installed in front of the traveling direction of the train 2 and the measurement acquired by communicating with the ground radio device 7 installed behind the traveling direction of the train 2 The train that is known from the installation position of the onboard radio 6 at the measured distance obtained by communicating with the ground radio 7 installed in front of the traveling direction of the train 2 instead of adding the vehicle edition growth to the distance Measurement distance obtained by calculating the last position of the train 2 based on the value obtained by adding the distance to the last tail of 2 and communicating with the ground radio 7 installed behind the traveling direction of the train 2 Alternatively, the start position of the train may be calculated and obtained based on a value obtained by adding the distance from the installation position of the onboard radio 6 to the known start of the train.

  For example, as shown in FIG. 5, the case where one on-board wireless device 6 is installed in the center portion of the train 2 will be described. When the train 2 is present between two ground devices 8 in a certain section. Communicating with the ground radio 7 installed in the forward direction of the train 2 to measure the distance and communicating the measured distance Ld1 with the ground radio 7 installed behind the train 2 in the traveling direction It is assumed that the measurement distance Ld2 is obtained by performing measurement. Then, the distance Lb from the installation position of the onboard radio 6 to the known tail of the train, the distance Lf from the installation position of the onboard radio 6 to the known start of the train, in each of these measurement distances Ld1, Ld2. Are added to obtain the final position and the leading position of the train 2, and based on the leading position and the trailing position of the train 2, the train existence range Lds of the train 2 is obtained.

  For example, as shown in FIG. 6, when the on-board radio device 6 is mounted at the beginning and the last part of the train 2, the on-board radio device 6 in front of the train 2 moves forward in the traveling direction of the train 2. The distance measurement is performed by communicating with the installed ground radio 7 and the distance Ld1 is measured by the on-board radio 6 at the end of the train 2 and the ground radio 7 installed behind the train 2 in the traveling direction. The distance is measured by performing communication to obtain the measurement distances Ld2, and the distance Lb from the installation position of the onboard radio 6 in front of the train 2 to the known end of the train at each of the measurement distances Ld1 and Ld2. Then, the distance Lf from the installation position of the last on-board radio 6 to the known start of the train is added to obtain the end position and the start position of the train 2, and the start position and the end position of these trains 2 are obtained. Train 2 train based on location And requests a within range Lds.

  Furthermore, for example, as shown in FIG. 7, when the onboard radio is mounted at the beginning and the end of the train 2, the onboard radio 6 at the end of the train 2 moves forward in the traveling direction of the train 2. Communicating with the installed terrestrial radio 7 to measure the distance and communicating the measured distance Ld1 with the terrestrial radio 7 installed behind the train 2 in the traveling direction of the train 2 by the onboard radio 6 of the train 2 To measure the distance Ld2 to obtain the measured distance Ld2, and the distance Lb from the installation position of the onboard radio 6 at the end of the train 2 to the known end of the train at these measured distances Ld1 and Ld2. The distance Lf from the installation position of the first onboard radio 6 to the known start of the train is added to obtain the last position and the first position of the train 2, and the first position and the last position of the train 2 are obtained. Based on train 2 And requests the car existence range Lds.

  As described above, the train existence range Lds obtained by the examples shown in FIGS. 5 to 7 is set so as to include the head position and the tail position, so that the measurement distance is actually measured when the distance measurement is performed wirelessly. Even if an error occurs in the measurement distance Ld1 and the measurement distance Ld2 that is detected longer than the actual distance, the value is larger than the actual vehicle knitting growth Ls, and the position of the train 2 is wider than the actual train knitting growth. Can be detected.

  As described above, in the present embodiment, the final position of the train 2 is obtained based on the measurement distance measured by the ground radio device 7 and the onboard radio device 6 installed in front of the traveling direction of the train 2, Based on the measured distance measured by the ground radio 7 and the on-board radio 6 installed behind the traveling direction of the train 2, the leading position of the train 2 is obtained, and based on the leading position and the trailing position of the train 2. Since the train existence range of the train 2 is obtained and the position of the train 2 is detected based on the train existence range, the train existence range is set so as to include the head position and the tail position. Even if the distance measurement by the system is detected longer than the actual distance, the obtained train existence range becomes a larger value than the actual train existence range, and the position of the train 2 can be detected in a wide range. The occurrence of a collision or overrun of the train 2 can be reliably prevented, it can significantly enhance the safety of the train 2 driving.

  Next, the passage determination of the train 2 with respect to a predetermined position set on the course of the train 2 will be described.

  First, the fact that the train 2 has started to pass through a predetermined position may be determined, for example, by the fact that the front end of the train traveling direction in the train traveling direction has started to pass through the predetermined position. Next, it may be determined that the train 2 has passed the predetermined position by, for example, the rear end in the train traveling direction of the train existing range having passed the predetermined position. Alternatively, it is determined that the train 2 has started to pass the predetermined position when the predetermined position is included in the train existence range of the train 2, and then the train 2 is determined to be the predetermined position when the predetermined position is not included in the train existence range. You may determine with having passed. Since the train existence range obtained based on the measurement is larger than the actual existence range of the train 2, it is determined that the train has started to pass but has not started to pass, and has not yet passed. However, it is not determined that it has passed.

  As described above, by using the train existence range obtained by the measurement described in each of the above embodiments, the passage of the train 2 can be properly detected for safety, so occurrence of a collision, an overrun, or the like is ensured. Therefore, the safety of traveling of the train 2 can be remarkably enhanced. Needless to say, the train presence range moves as the train 2 moves.

  Further, the determination that the vehicle is passing through the ground wireless device 7 can also utilize the fact that communication between the ground wireless device 7 and the on-board wireless device 6 is not possible. This aspect will be described with reference to FIG. The configuration of the train 2 is the same as that in FIG. 1 and will be described with reference to FIG.

  An onboard device 3 and an onboard radio device 6 are mounted at the beginning and the end of the train 2, respectively, and the onboard radio device 6 at the head of the train 2 is installed in front of the traveling direction of the train 2. The distance measurement is performed by communicating with the terrestrial radio 7 installed on the rear side in the traveling direction of the train 2 by the onboard radio 6 at the end of the train 2. It is configured.

  It is assumed that communication cannot be performed when the ground radio device 7 and the onboard radio device 6 are within a predetermined distance due to the setting of the antenna directivity of the ground radio device 7 and the onboard radio device 6. In this case, when the head vehicle of the train 2 reaches the installation position of the ground radio device 7, communication between the ground radio device 7 and the on-board radio device 6 cannot be performed. Will continue until the last vehicle of the vehicle passes the ground radio 7. After that, when the last vehicle of the train 2 passes the installation position of the ground radio 7, the ground radio 7 and the last on-board radio 6 in the rearward moving direction resume communication, and continuously The distance is measured, and the measurement distance gradually increases as the train 2 advances. For this reason, the on-board device 3 becomes incapable of communication after the measurement distance is gradually shortened, and then a series of measurement results that the measurement distance is gradually increased. When communication is impossible, the position of the train 2 may be detected by assuming that the train 2 passes the installation position of the ground radio device 7.

  As described above, communication between the ground radio device 7 and the on-board radio device 6 is performed based on a series of measurement results that the communication distance is gradually reduced after the measurement distance by the on-vehicle device 3 is gradually shortened and then the measurement distance is gradually increased. When it is impossible to detect the position of the train 2 by detecting the position of the train 2 on the assumption that the train 2 passes the installation position of the ground radio 7, the train 2 The occurrence of a collision or overrun can be reliably prevented, and the safety of traveling of the train 2 can be remarkably enhanced.

  In each of the above embodiments, the on-board processing unit 4 of the on-board device 3 is configured to function as a train position detection device. However, the on-board device 3 and a position detection device that detects the position of the train are provided. You may make it comprise as another apparatus.

  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.

DESCRIPTION OF SYMBOLS 1 Track 2 Train 3 On-board equipment 4 On-board processing part 5 Tacho generator 6 On-board radio 7 Ground radio 8 Ground equipment 9 Central equipment

Claims (9)

An on-board radio that performs a distance measurement on a known ground device mounted on a train traveling on a predetermined track, and
A position detection device that detects the position of the train based on a distance measured by the on-board radio,
The position detection device detects the position of the train based on a measurement distance to the known ground device by the on-board radio and an installation position of the ground device. The on-board radio performs distance measurement with respect to the ground device installed behind the traveling direction of the train,
The position detection device calculates a distance from the ground device in the forward direction of the train from a distance obtained by subtracting a distance measured by the onboard radio from the distance between the ground devices in the forward and backward directions of the train. The train position detection system according to claim 1, wherein the train position is detected. It further comprises a speed detection device for detecting the speed of the train,
The on-board radio performs distance measurement with respect to the ground device ahead of the traveling direction of the train, and performs distance measurement with respect to the ground device after a predetermined time,
The position detection device has a short distance among a distance calculated by reflecting the distance advanced for the predetermined time by the detection speed by the speed detection device and a measurement distance after the predetermined time. The train position detection system according to claim 1, wherein the train position is detected based on the train position. The on-board radio performs distance measurement with respect to the ground device in the forward and backward direction of travel of the train,
The train position detection system according to claim 1, wherein the position detection device detects a train position from a range in which the distances obtained by adding the train formation to the measurement distances overlap each other. The on-board radio performs distance measurement with respect to the ground device in the forward and backward direction of travel of the train,
The position detection device detects a position of a train from a range where each distance overlaps each of the measured distances plus a distance from the onboard radio to the tail and top of the train. Item 2. The train position detection system according to item 1.   The position detection device obtains a train existence range of the train based on a measurement distance to the known ground device and an installation position of the ground device, and detects a train position based on the train existence range. The train position detection system according to any one of claims 1 to 5, wherein the train position detection system is characterized.   The train position detection system according to claim 6, wherein the train existence range is set to include an actual existence range of the train.   The position detection device determines that the train has started to pass through a predetermined position because the train existence range of the train has passed a predetermined position, and the train presence range of the train has finished passing the predetermined position. The train position detection system according to claim 6 or 7, wherein the train is determined to have passed a predetermined position. The on-board radio continuously performs distance measurement with respect to the ground device in the forward direction of the train,
The said position detection apparatus detects that the said train is located in the said ground apparatus, when the distance measurement by the said onboard radio apparatus becomes impossible, The Claim 1, 7 or 8 characterized by the above-mentioned. The train position detection system according to any one of the above.

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