JPH092269A - Train position detecting device - Google Patents

Abstract

PURPOSE: To improve safety through constant failure detection by providing second checking tags that can receive response signals regardless of approach of a train in a train position detecting device using interogators, checking tags and onboard tags. CONSTITUTION: Interogators a (a1 -an ) are installed every specified space on one side of ground with a track R placed in between, and checking transponders (checking tags) b (b1 -bn ) are installed on the ground opposed to the interogators (a), with the track R placed in between. A transponder (onboard tag) group (c) is provided on the side walls on the right side in the proceeding direction of trains T1 , T2 , and second checking transponders d (d1 -dn ) are provided in the positions where response signals based on question signals sent from the interogators (a) can be sent out regardless of approach of the trains. On the basis of response signals from the respective transponders b, d, the state of a train position detecting means is judged in a ground station 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train position detecting device, and more particularly to a train position detecting device capable of accurately detecting a train position by a communication system using an interrogator and a transponder, thereby contributing to shortening a train operation interval. Regarding

[0002]

2. Description of the Related Art The applicant of the present invention has previously filed Japanese Patent Application Laid-Open No. 5-3216.
Japanese Patent Publication No. 6 proposes an apparatus for detecting a train position by a communication method using an interrogator and a transponder. FIG. 5 is a schematic configuration diagram of the train position detecting device according to the proposal, and is shown as a plan view near a platform H at a certain station.

A _{1 to} a _n are interrogators, which are arranged on one side of the ground across the line R (on the right side of the traveling direction of the train in the illustrated example) at predetermined intervals, preferably slightly shorter than the train length. It is installed at intervals equal to the length. And
On the ground that face across the line R of the interrogator a ₁ ~a _n, each check for a transponder (hereinafter referred to as check tag) b ₁ ~b _n are respectively installed.

Reference numeral c denotes a transponder (hereinafter referred to as an on-board tag) group, which is a side wall on the right side in the traveling direction of each train T ₁ , T ₂ (only two trains are shown in this example, but other trains are the same). It is provided in. This on-board tag group c includes a plurality of on-board tags c ₁ -c ₁ at equal intervals for each vehicle of each train T ₁ , T _2.
and it is configured to provide a c _n. Therefore, for example, when one vehicle length is 20 m and four vehicle tags are provided on the vehicle, the vehicle tags are provided at intervals of 5 m. To each car on the tag c ₁ to c _n, distance information to other information number identifying the train from the head portion and the tail of the train to the car on the tag it is stored in advance.

[0005] In the figure, 10 is to drive control each interrogator a ₁ ~a _n at the ground station, and a position detector 11 for detecting the position of the train in response to a signal from the interrogator a ₁ ~a _n, Train position information from this position detector 11 is input to generate control signals for each train T ₁ , T ₂ ,
A train controller 12 for sending the control signal to each of the trains T ₁ and T ₂ via the track circuits TR _{1 to} TR _n is included.

FIG. 6 is a block diagram showing the electrical configuration of the train position detecting device according to the above proposal. Each interrogator a ₁ ~a _n, each car on the tag c ₁ to c _n of the check tag b ₁ ~b _n and vehicle on the tag group c is because each the same configuration, here, the interrogator a _1, tag check b ₁ and on-board tag c ₁ are shown as an example.

The interrogator a ₁ comprises a well-known interrogator, and a response signal from the first loop coil 20 for sending out an interrogation signal (mode pulse) that also serves as a power wave and the check tag b ₁ or the on-board tag c _1. The first loop coil 20 is connected to an antenna 22 including a second loop coil 21 for receiving (code pulse) and a controller 23 that controls communication between the ground station 10.
An interrogator transmitter 24 for generating an interrogation signal to the controller, and a controller 23.
And a response receiver 25 that processes the response signal from the second loop coil 21.

The check tag b ₁ and the on-vehicle tag c ₁ are
It is composed of a well-known non-power supply type tag. That is, these tags b _1, c ₁ is composed of the second loop coil 31, 41 Metropolitan for sending a response signal to the first loop coil 30, 40 and interrogator a ₁ receives the interrogation signal from the interrogator a ₁ Antennas 32 and 42
When, a rectifier 33, 43 for rectifying the signal received by the first loop coil 30 and 40, are driven by a current from the rectifier 33 and 43, prepared in advance each tag b ₁ ~b _n, for each c ₁ to c _n The response transmitters 34 and 44 output the response signals thus generated to the second loop coils 31 and 41. Incidentally, in the vehicle on the tag c _1, as described above, the distance information from the head portion and the tail of the train T ₁ to the vehicle on the tag c ₁ is stored, from the vehicle on the tag c ₁ This distance information is included in the response signal in addition to the train number information.

Next, the train position detecting operation of the train position detecting device according to the above proposal will be described. First, the case where the train T ₁ (or T ₂ ) does not exist between the interrogator a ₁ and the check tag b ₁ will be described. In this case, the interrogation signal from the interrogator a ₁ is transmitted to the antenna 22.
When sent to the check tag b ₁ via the interrogator, the inquiry signal is received by the antenna 32 and the response transmitter 34 is driven. Therefore, the check tag b ₁ sends a predetermined response signal to the interrogator a ₁ .

Therefore, when this response signal is no longer obtained, the interrogator a ₁ or the checking tag b
_In this case, it means that something went wrong in ₁
The train position detecting operation, which will be described later, is stopped and the abnormality processing is performed.

When a train T ₁ (or T ₂ ) is present between the interrogator a ₁ and the check tag b ₁ and the interrogator a ₁ and the on-board tag c ₁ face each other, the above-mentioned The inquiry signal and the response signal are exchanged in the same manner as with the check tag b ₁ . That is, the inquiry signal from the interrogator a ₁ is transmitted to the antenna 22.
When the inquiry signal is transmitted to the on-board tag c ₁ via the antenna, the inquiry signal is received by the antenna 42 and the response transmitter 44 is driven. Therefore, from the tag c ₁ on the vehicle, the interrogator a
_A response signal is sent toward ₁ . Such communication is
Other cars on the tag c ₂ to c _n is performed for each facing the interrogator a _1.

When the installation intervals of the check tags b _{1 to} b _n are set to be slightly shorter than the train length, the interrogators a _{1 to} a _n detect the response signals from the opposite check tags. The response signal from the train will be received as an alternative, and if this alternative reception is not working, it means that the interrogator or check tag has a problem, and this will detect an abnormality in the detection function. You can Furthermore, the check tags b _{1 to} b _n and the on-board tags c
₁ to c _n are set to non-powered, it may of course independently be Available Power supply type having a power supply. It is also possible to be reflected by modulating a carrier wave from the interrogator a ₁ ~a _n.

When the trains T ₁ and T ₂ are in the positional relationship shown in FIG. 5, the interrogators a ₁ and a ₃ communicate with the check tags b ₁ and b ₃ , respectively, and on the other hand,
Interrogator a _2, a _n is in each communication state and a car on the tag group c of each train T _1, T _2.

The positions of the trains T ₁ and T _n are detected by the interrogators a ₂ and a _n communicating with any on-board tag of the on-board tag group c. That is, each tag b ₁
Distance information to the top in ~b _n have been written, also, since the installation position of the interrogator a ₁ ~a _n is input to the position detector 11 as known data, the interrogator a ₁ ~a Each train T _{1 to} T with _n as the reference position
The head and tail of ₂ are required.

For example, suppose that the train T ₁ is a car with a length of 20 m, has 10 cars, and each car has four on-board tags at equal intervals. _{When 2} communicates with the _20th on-board tag c ₂₀ , it is detected that the head part of the train T ₁ is 100 m ahead of the installation position of the interrogator a ₂ and the tail part is located 100 m before, The detection error is plus or minus 5
m. Similarly, the train position of the succeeding train T ₂ is detected based on the interrogator a _n .

The detected position information of each train is transmitted to each train for use. That is, the detected train position information is transmitted from the train controller 12 to each track circuit TR _{1 to} TR _n , and each train can be received through the track circuit in which the own train is located. The train information to be received can receive not only the position information of the preceding train but also the position information of the own train, but the interrogators a _{1 to} a _n and the check tags b _{1 to} b _n are provided only near the station. When installed, and when the own train position information cannot be obtained by using these, the own train position detection device, for example, the tachogenerator installed in the own train detects the own train position.

As described above, in the train position detecting apparatus according to the above proposal, the tail position of the preceding train (here, train T ₁ ) located near the station is detected with an accuracy of ± 5 m, and Since the position of the train (here, the train T ₂ ) is also known, the own train T ₂ can set the traveling speed pattern and travel.

The traveling according to this traveling speed pattern is an operation method in which a stop target point of a train is set and a high speed operation is performed as much as possible within a range where the train can be stopped at the stop target point. Therefore, the own train T ₂ can operate by increasing the signal indication up to the maximum speed allowed with the tail portion of the preceding train T ₁ as the stop target point, and the operation can be shortened. it can.

[0019]

By the way, the train position detecting device according to the above-mentioned proposal has a feature that it can detect the train position with high accuracy and can be useful for shortening the train time.

However, while the train is being detected, that is, when the train enters between the interrogator and the checking tag, the transmission from the checking tag cannot be received and the failure detection operation of the train detection device is interrupted. Will end up.

Therefore, an object of the present invention is to provide a train position detecting device capable of detecting a failure even when a train enters between an interrogator and a check tag.

[0022]

In order to achieve the above-mentioned object, a train position detecting device according to the present invention includes an interrogator provided on one side of the ground across a line and the line facing the interrogator. A check tag provided on the other side of the ground sandwiched between them, a plurality of on-board tag groups provided at a predetermined interval on the side surface on the side of the interrogator of the train passing on the track, and from the interrogator to the above Instead of receiving the response signal from the check tag based on the inquiry signal sent to the check tag, when receiving the response signal from the above-mentioned on-board tag group, A train position detecting device having position detecting means for detecting the position of a train equipped with the on-board tag group based on the communication of the train tag, A second check tag provided at a position where it can send out a response signal regardless of whether or not a train has entered, and when a response signal from the check tag and a response signal from the second check tag are received, Alternatively, when a response signal from the on-board tag group and a response signal from the second checking tag are obtained instead of the response signal from the checking tag, the position detecting means is determined to be normal. It is characterized by having and. Also, the check tag, the second check tag, and the on-board tag group are driven by receiving the electric wave from the interrogator,
Alternatively, it is characterized by modulating and reflecting a carrier wave from an interrogator.

[0023]

In the above structure, the judging means receives the response signal from the check tag and the response signal from the second check tag, or the on-board tag group instead of the response signal from the check tag. From the response signal from the second
When the response signal from the check tag is obtained, the position detecting means is determined to be normal.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an apparatus according to an embodiment, and is shown as a plan view near a platform H at a station.

The same reference numerals are used for the same components as those of the train detection apparatus according to the above-described proposals shown in FIGS. 5 and 6, and these components are different only in new parts because the description is duplicated. Description will be given with reference numerals.

In the figure, d _{1 to} d _n are second check tags, which are provided corresponding to the respective interrogators a _{1 to} a _n . Each second check tags d ₁ to d _n
Since they have the same configuration, the second check tag d ₁ provided corresponding to the interrogator a ₁ will be described as an example.
As shown in FIG. 2, the second check tag d ₁ is irrespective of whether or not the train T ₁ (or T ₂ ) has entered.
It is always provided at a position where it can communicate with the interrogator a ₁ .

In the example of FIG. 2, the second check tag d
₁ is provided at the end of an arm P ′ provided at the tip of the pole P on which the interrogator a ₁ is installed, and is configured to communicate with the antenna 22 of the interrogator a ₁ . .

The second checking tag d ₁ has the same structure as the checking tag b ₁ . That is, the second check tag d _1, as shown in FIG. 3, a second loop for sending a response signal to the first loop coil 50 and the interrogator a ₁ receives the interrogation signal from the interrogator a ₁ An antenna 52 including a coil 51 and a rectifier 5 that rectifies a signal received by the first loop coil 50.
3 and the response signal prepared by the second check tag in advance by being driven by the current from the rectifier 53.
1 and a response transmitter 54 for outputting to 1.

The interrogator a ₁ has a check tag b.
_In the relationship between ₁ and the on-board tag c ₁ , since communication is performed alternatively, it is not necessary to consider interference between the check tag b ₁ and the on-board tag c ₁ . However, since the second check tag d ₁ is communicated with the interrogator a ₁ together with the check tag b ₁ or the on-board tag c _1, it is necessary to devise to avoid interference.

In order to avoid such interference, the applicant of the present invention can employ the communication method using a PN code proposed in, for example, Japanese Patent Laid-Open No. 5-30078. That is, by making the PN codes used in the checking tag b ₁ , the second checking tag b _1, and the onboard tag c ₁ different from each other, interference can be effectively prevented.

Of course, as a method for avoiding this interference, a different modulation method is adopted, or only the second check tag d _{1 is} activated every few seconds, for example, every 2 seconds, and the interference when activated is generated. The data of the check tag b ₁ or the on-vehicle tag c ₁ may be discarded.

The train detection operation using the interrogator a ₁ ~a _n and vehicle on the tag c ₁ to c _n in the train position detection device according to this embodiment is the same as the train detector according to the proposal described above, The description is omitted.

Next, referring to the time chart of FIG. 4, the reception state of the interrogator a ₁ , that is, the check tag b
₁ (FIG. (B)), the car on the tag c ₁ to c _n (FIG. (D)), for the second checktag d ₁ (FIG. (C)) and the train T ₁ (Fig. (A)) The relationship with is explained. Note that (c ') and (d') of the same figure are enlarged views of the portion surrounded by the one-dot chain line of (c) and (d) of the same figure.

Now, when a signal (inquiry signal) is transmitted from the interrogator a _{1 at a} predetermined interval, and when the train T ₁ does not enter between the interrogator a ₁ and the checking tag b ₁ , The check tag b ₁ and the second check tag d ₁ both send a signal in response to the inquiry signal, and the response signal is received by the interrogator a ₁ . As shown in FIGS. 4 (b) and 4 (c), the second check tag d ₁ is used once for every question from the interrogator a ₁ (see N seconds in the figure). )
It is configured to output a response signal.

By the way, when the response signal from the check tag b ₁ or the second check tag d ₁ is interrupted even though the train T ₁ has not entered, the check tag b ₁ side, or It can be determined that a failure has occurred on the second check tag d ₁ side or the interrogator a ₁ side.

Furthermore, when the train T ₁ is entering between the interrogator a ₁ and the check tag b ₁ ,
When the response signal from the check tag d ₁ is cut off,
Second check tag d ₁ side or interrogator a
It can be determined that a failure has occurred on the side ₁ .

When it is determined that the above-mentioned failure has occurred, it means that the train position cannot be normally detected. In this case, the ground station 10 sends an emergency brake command to the train T ₁ . Sent out.

The cross mark in FIG. 4 (d ') indicates that when the train T ₁ is entering between the interrogator a ₁ and the check tag b ₁ , the signal from the second check tag d ₁ and the vehicle It shows a state in which a signal from one tag of the upper tag group c is interfering. Since train detection based on the response signal from the on-board tag in such an interfering state becomes inaccurate, train position detection is performed based on other non-interference response signals by discarding this response signal. Be done.

As described above, since the train position detecting device according to the present embodiment is provided with the second check tag capable of receiving the response signal regardless of whether or not the train has entered, failure detection is always performed. Therefore, it can be made highly safe.

[0040]

The train position detecting device using the interrogator, the check tag and the on-board tag according to the present invention is provided with the second check tag capable of receiving the response signal regardless of whether or not the train has entered. Therefore, the failure can always be detected, and the safety can be improved. Further, when the checking tag, the second checking tag, and the on-vehicle tag group are of the non-power source type, they can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a positional relationship between a train, an interrogator, and each tag.

FIG. 3 is a block diagram showing an electrical configuration.

FIG. 4 is a time chart.

FIG. 5 is a schematic configuration diagram of the previously proposed device.

FIG. 6 is a block diagram showing an electrical configuration of the previously proposed device.

[Explanation of symbols]

a ₁ ~a _n interrogator b ₁ ~b _n check for a transponder (tag check) c transponder group (vehicle on the tag group) c ₁ to c _n transponder (onboard tag) d ₁ to d _n second check for a transponder ( 2nd check tag) T ₁ , T ₂ train

Claims (2)

[Claims] 1. An interrogator provided on one side of the ground across a track, a transponder for checking provided on the other side of the track opposite the interrogator, and a train passing on the track. Instead of receiving a response signal from the check transponder based on the interrogator sent from the interrogator to the check transponder, a plurality of transponder groups provided on the side surface on the interrogator side at a predetermined interval. A train position detecting device having position detecting means for detecting the position of a train equipped with the transponder group based on communication with each transponder of the transponder group when receiving a response signal from the transponder group. A response signal based on the interrogation signal sent from the interrogator. A second check transponder provided at a position where the train can be transmitted regardless of whether or not a train has entered, and when a response signal from the check transponder and a response signal from the second check transponder are received or the check is performed. A response signal from the transponder group and a response signal from the second check transponder in place of the response signal from the transponder for use in the position detection means, the position detection means being determined to be normal. Train position detection device characterized by. 2. The check transponder, the second check transponder, and the transponder group are driven by receiving a power wave from the interrogator, or modulate and reflect a carrier wave from the interrogator. The train position detection device according to item 1.