JP2000289616A - System and method for detecting position of moving body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loop antenna type system and a method for detecting the position of moving body, capable of reducing costs of equipment and con struction. SOLUTION: A position detecting signal f1 or the like is transmitted from a transmitter 10 to a receiver 13. The position detecting signal is transferred from a front position detecting section to a rear position detecting section by a bucket relay method. The position detecting signal sent to each position detecting section is set different from each other. A train recognizes the position detecting section wherein it exists at present by receiving the position detecting signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving object position detection system for detecting the position of a moving object on a vehicle based on information transmitted from a loop antenna installed on the ground.
And a moving object position detecting method using the moving object position detecting system.

[0002]

2. Description of the Related Art Conventionally, in a type of railway in which a vehicle having steel wheels runs on two steel rails, when two or more trains or vehicles are operated on the same track, In order to prevent an accident such as a rear-end collision or a collision, the track is divided into a plurality of sections (hereinafter referred to as “blocking sections”) in the traveling direction.
Not shown. ), And a driving security system (hereinafter referred to as a “blocking system”) that restricts a continuing train or an oncoming running train from entering the blocking section until one train has completely passed through one block section. ").)

In such a blockage system, two steel rails (not shown) in a block section are electrically connected to each other to form a rectangular electric circuit (hereinafter referred to as a "track circuit").
That. Not shown. ), And is electrically insulated from adjacent track circuits before and after by an insulating seam.
This track circuit has a current (hereinafter, "track circuit signal current").
That. ) Is flowing from the power transmission side to the receiving side.

When a vehicle (not shown) enters the track circuit constructed as described above, two steel rails pass through steel wheels (not shown) of the vehicle and a steel axle (not shown). And the track circuit signal current does not reach the charging side. Therefore, when the track circuit signal current is monitored on the receiving side and a state where the track circuit signal current is not sent to the receiving side is detected, a train or the like exists in the block section (hereinafter, “railing”). ) Can be detected (hereinafter, referred to as “train detection”).

On the other hand, in recent years, a railway position detection system using a loop antenna, a transmitter and a receiver has been known. In this method, a loop antenna (not shown) formed by winding a guide wire is installed for each block section, and a different position detection signal is transmitted from the loop antenna for each block section. The position where the train or the like is present is detected on the vehicle on the basis of the position detection signal received in step (1).

[0006]

However, in the above-mentioned conventional train position detecting system using a loop antenna, a transmitting device, a receiving device, an approach cable connecting each loop antenna and a transmitting / receiving device, and the like are paired with the loop antenna. One was to respond. For this reason,
The number of transmission / reception devices is required by the number of loop antennas (the number of block sections), and the number of approach cables is twice the number of loop antennas (the number of block sections). Accompanying this, equipment costs and construction costs were required, but in recent years, reductions in these costs have been demanded.

In the above-mentioned loop disconnection check of the loop antenna, current or the like is always transmitted to the loop antenna as a disconnection detection check signal, and the disconnection detection check signal is received on the side opposite to the transmitting side. A method has been adopted in which when a check signal for disconnection detection is no longer received, it is determined that "the loop has been disconnected".

However, this loop disconnection check method requires a dedicated device for checking the disconnection, and this also causes an increase in equipment costs and construction costs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a loop antenna type moving object position detecting system capable of reducing equipment and construction costs. An object of the present invention is to provide a method for detecting a position of a moving object.

[0010]

[Means for Solving the Problems]

In order to solve the above-mentioned problems, a moving object position detecting system according to the present invention comprises n (n: a positive integer of 2 or more) loop antennas formed by winding a guide wire once. One position detection section is constituted by one loop antenna arranged in a line, and a ground transmitter is connected to a loop antenna that is one end of the n loop antennas. A terrestrial receiver is connected to a loop antenna serving as one end of the plurality of loop antennas, and a repeater is arranged between loop antennas adjacent to each other among the n loop antennas arranged in parallel. A position detection signal is transmitted from the ground transmitter to the ground receiver, and the position detection signal is transmitted from a front position detection section to a subsequent position detection section by a bucket brigade method. The position detection signal flowing in each position detection section is made different, and the moving body receives the position detection signal to recognize the current position section which is the position detection section where the moving body is currently located. It is characterized by the following.

In the above-mentioned moving object position detecting system, preferably, the moving object transmits a moving object signal representing the recognized position detecting section to the current position section,
The moving object signal is superimposed on the position detection signal and received by the ground receiver, and a current position section of the moving object is detected on the ground side.

Further, in the moving body position detecting method according to the present invention, n (n: a positive integer of 2 or more) loop antennas formed by winding a guide wire once are arranged in a line. One position detection section is formed by one loop antenna, a ground transmitter is connected to a loop antenna serving as one end of the n loop antennas, and one end of the n loop antennas is connected. A terrestrial receiver is connected to the loop antenna to be provided, and a repeater is disposed between the loop antennas adjacent to each other among the n loop antennas arranged side by side. A position detection signal is transmitted, and the position detection signal is transmitted from a front position detection section to a subsequent position detection section by a bucket brigade method, and the position detection signal flowing in each position detection section is different. It is, the mobile body and recognizes the current position interval the moving body is a position detection section that currently exist by receiving the position detection signal.

In the above-mentioned moving object position detecting method, preferably, the moving object transmits a moving object signal representing the recognized position detecting section to the current position section, and the moving object signal is used for the position detecting. The current position section of the moving object is detected on the ground side by being superimposed on a signal and received by the ground receiver.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a moving object position detecting system according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a conceptual diagram showing a configuration of a train position detecting system according to one embodiment of the present invention.

As shown in FIG. 1, a train position detection system of this embodiment, the loop antenna L ₁ and L ₂ and L ₃
, A transmitter 10, an approach cable 21, repeaters 11 and 12, an approach cable 22, and a receiver 1.
3 and an on-board signal receiving device 14.

Each of the loop antennas L _1, L ₂ and L ₃ is formed by winding a guide wire once in a loop shape (annular shape), and is linearly arranged near the ground line in the line direction. Have been. One loop antenna constitutes one position detection section. The position detection section corresponds to a block section in a conventional railway.

The transmitter 10 is provided on the ground, and the transmitter 10
Is the loop antenna L via the approach cable 21
₁ is connected to the beginning. The transmitter 10 corresponds to a terrestrial transmitter. Between the beginning of the loop antenna L ₁ of the end portion and the loop antenna L _2, repeater 11
Is connected.

The repeater 11 includes a receiver 11a and a transmitter 1
1b, an on-board signal passing band-pass filter (hereinafter referred to as “on-board signal passing BPF”), and normal reception f ₁ R.

Further, between the beginning of the end of the loop antenna L ₂ and the loop antenna L _3, the repeater 12 is connected.

The repeater 12 includes a receiver 12a and a transmitter 1
2b, the on-vehicle signal passing BPF, and the normal reception f ₂ R.

[0023] In addition, at the end of the loop antenna L ₃ is,
The receiver 13, the normal reception relay f ₃ R, and the on-board signal reception device 14 are connected via the approach cable 22. The receiver 13 corresponds to a ground receiver.

Next, the operation of the train position detecting system will be described.

The transmitter 10 outputs a position detection signal indicating that the signal is present in the first position detection section to the loop antenna L _1.
Send to The position detection signal is, for example, a signal having one frequency f ₁ or a signal having a carrier frequency modulated at f ₁ . Hereinafter, the position detection signal flowing in the loop antenna L ₁ that f _1.

On the other hand, the running train is provided with an on-board antenna (not shown), a receiver (not shown), a transmitter (not shown), and an on-board controller (not shown). Have been. The in-vehicle antenna is capable of two-way information transmission between the ground antenna and the loop antenna on the ground when in an electromagnetically coupled state.

[0027] In FIG 1, when there is a train in the position shown by T _1, the train, the position detection signal f ₁ flowing through the loop antenna L _1, is received by the onboard antenna.
By receiving the position detection signal f ₁ via the receiver, the on-board control device in the train transmits “the loop antenna L ₁
This train exists in the position detection section specified by "."

[0028] In this case, the train train control device, transmits the on-board signal f _A1 toward the car on the transmitter via an onboard antenna to the loop antenna L ₁ of the ground. The on-board signal f _A1 is a "train exists within the position detection section defined by the loop antenna L _1" signal containing the purport, for example,
A signal carrier frequency is modulated by f _A.

This on-board signal f _A1 is a position detection signal (f
₁ In addition, unlike the f _2, f also includes ₃₎ to be described later, a different signal also with other on-board signal described later. Therefore,
The end of the loop antenna L _1, and the position detection signal _1,
The signal on which the on- _board signal f _A1 from the train T ₁ is superimposed flows.

This superimposed signal is received by the repeater 11. The repeater 11, the on-board signal passes BPF is provided, passing the on-board signal frequency f _A. In addition, the receiver 11a of the transponder 11, the remaining components on-board signaling component is removed from the superimposed signal, that is, the position detection signal f ₁ is outputted.

The receiver 11a has a normal reception relay f ₁ R
Is connected. The normal reception relay f ₁ R, signals of frequency f ₁ is input. In this case, the normal reception relay f ₁
Since R receives the signal of frequency f ₁ , it can determine that “the position detection signal from the first position detection section adjacent to the front has been normally received”, and can transmit the output of the transmitter 11 b to the outside. And

The transmitter 11b transmits a position detection signal indicating that the signal is present in the second position detection section to the loop antenna L.
Send to ₂ . The position detection signal, for example, one frequency f ₂ of the signal, or signal carrier frequency is modulated by f _2, etc. (hereinafter, referred to as. "Position detection signal f _2"). The position detection signal f ₂ is different from the position detection signal (f ₁ and f ₃ described later), and is different from the on- _board signal (f _A1
And _fA2 described later).

[0033] The position detection signal f _2, the on-board signal f _A1 output from the onboard signal transmission BPF is superimposed is transmitted from the repeater 11 to the loop antenna L _2.

The superimposed signal is received by the repeater 12. The repeater 12 is provided with an on-vehicle signal passing BPF similar to that of the repeater 11, and passes the on-vehicle signal f _A1 . In addition, the receiver 12a of the relay 12, the remaining components on-board signaling component is removed from the superimposed signal, that is, position detection signals f ₂ is outputted.

The receiver 12a has a normal reception relay f ₂ R
Is connected. The normal reception relay f ₂ R, signals of frequency f ₂ is input. In this case, the normal reception relay f ₂
Since R receives the signal of frequency f ₂ , it determines that “the position detection signal from the front adjacent second position detection section has been normally received”, and transmits the output of the transmitter 12 b to the outside. Make it possible.

The transmitter 12b transmits a position detection signal indicating that the signal is present in the third position detection section to the loop antenna L.
Send to ₃ . The position detection signal is, for example, a signal of one frequency f _3, a signal whose carrier frequency is modulated at f ₃ (hereinafter, referred to as a “position detection signal f ₃ ”). The position detection signal f ₃ is a position detection signal (f ₁ ,
f ₂ ), on- _board signal (f _A1 ) and f
_A2 ).

[0037] The position detection signal f _3, the on-board signal f _A1 output from the onboard signal transmission BPF is superimposed is transmitted from the repeater 12 to the loop antenna L _3.

This superimposed signal is received by the on-board signal receiving device 14. The on-vehicle signal receiving device 14 includes the repeater 1
An on-vehicle signal passing BPF (not shown) similar to the cases of 1 and 12 is provided, and extracts on-vehicle signal f _A1 . Thus, on-board signal receiver 14 recognizes that "the train is present in the position detection section defined by the loop antenna L _1".

The receiver 13 outputs the remaining component obtained by removing the on-vehicle signal component from the superimposed signal, that is, the position detection signal f ₃ . The receiver 13 is connected to a normal reception relay f ₃ R. In the normal reception relay f ₃ R,
Signal of the frequency f ₃ is input. In this case, since the signal of the frequency f ₃ has been input, the normal reception relay f ₃ R determines that “the position detection signal from the third position detection section adjacent ahead is normally received”. , It is determined that “there is no abnormality (disconnection, failure, etc.) in the loop antennas L _{1 to} L ₃ ”.

Next, in FIG. 1, when there is a train in the position shown by T ₂ are, trains, the position detection signals f ₂ flowing through the loop antenna L _2, is received by the onboard antenna. By receiving the position detection signals f ₂ through the receiver, the on-train control unit in the train recognizes that "the train is present at the position within the detection zone defined by the loop antenna L _2".

In this case, the on-board control device of this train transmits the on-board signal f _A2 from the on- _board transmitter to the loop antenna L ₂ on the ground via the on-board antenna. The on-board signal f _A2 is a signal including a fact that "the train is present in the position detection section defined by the loop antenna L _2", for example,
A signal carrier frequency is modulated by f _A.

The on-vehicle signal f _A2 is obtained by the same operation as described above unless the loop antenna is disconnected or broken.
Received and extraction by onboard signal receiver 14, "Current Position section the train currently exists is in the position detection section defined by the loop antenna L _2" that detects the.

Next, in FIG. 1, with a train is present in the position indicated by T _3, it will be described when a disconnection in the loop antenna L ₃ occurs. In this case, the disconnection position detection signal f ₃ is the loop antenna L ₃ does not flow. Therefore, the train cannot receive the position detection signal.

In such a case, the on-vehicle control device of the train determines that "an abnormality has occurred on the ground side", applies an emergency brake to the train, and controls the train to stop in an emergency.

On the other hand, on the ground side, on-board signal receiver 14 a signal from the loop antenna L ₃ can not be received.
Therefore, the receiver 13 also can not receive the position detection signals f _3. In such a case, the normal reception relay f
₃ R is, since the signal of the frequency f ₃ is not inputted, it is determined that "do not normally receive the position detection signal from the third position detection section adjacent to the front", in this case, "the loop antenna L ₁ the ~L _3, abnormality (breakage, failure, etc.) can be determined that has occurred. "

The power to each of the repeaters 11 and 12 can be supplied from the outside for each of the repeaters, or supplied by superimposing the power on the loop antenna.

As described above, the train position detecting system according to the present embodiment has the following advantages.

1) A total of two approach cables may be used for transmission and reception. Also, the number of transmitters and receivers may be one each. Although it is necessary to provide the number of repeaters by one less than the number of position detection sections, it is inexpensive compared to the transmitter and the receiver. Therefore, equipment costs and construction costs can be significantly reduced as compared with the related art.

2) Further, since the position detection signal is transmitted from the front position detection section to the succeeding position detection section by the bucket brigade method, the loop disconnection check signal can also be used as the position detection signal. In addition, a dedicated device for checking the loop disconnection is unnecessary, and in this regard, the equipment cost and the construction cost can be reduced.

The present invention is not limited to the above embodiment. The above embodiment is an exemplification, and has substantially the same configuration as the technical idea described in the scope of the claims of the present invention. It is included in the technical scope of the invention.

For example, in the above-described embodiment, a railroad has been described as an example of the moving object position detection system. However, the present invention is not limited to this example, and may be applied to other transportation means. , For example, new transportation systems, monorails,
It may be used for a rail bus or the like.

Further, in the above embodiment, the system in which the current position is detected on the train side and then the current position is notified to the ground side has been described as an example, but the present invention is not limited to this example. , Other configurations of the system,
For example, a system may be used in which only the current position is detected on the train side and the current position is not reported to the ground side.

[0053]

As described above, the present invention has the following advantages.

A) The number of approach cables may be two for transmission and reception. Also, the number of transmitters and receivers may be one each. Although it is necessary to provide the number of repeaters by one less than the number of position detection sections, it is inexpensive compared to the transmitter and the receiver. Therefore, equipment costs and construction costs can be significantly reduced as compared with the related art.

B) Further, since the position detection signal is transmitted from the front position detection section to the succeeding position detection section by the bucket brigade method, the loop disconnection check signal can also be used as the position detection signal. In addition, a dedicated device for checking the loop disconnection is unnecessary, and in this regard, the equipment cost and the construction cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a configuration of a train position detection system according to an embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 10 transmitter 11 repeater 11a receiver 11b transmitter 12 repeater 12a receiver 12b transmitter 13 receiver 14 on-board signal receiver 21, 22 approach cable f ₁ R to f ₃ R normal reception relay L _{1 to} L ₃ loop antenna T ₁ ~T ₃ train

Claims (4)

[Claims] An n (n: a positive integer of 2 or more) loop antennas formed by winding an induction wire once are arranged in a line, and one position detection section is formed by one loop antenna. A terrestrial transmitter is connected to a loop antenna serving as one end of the n loop antennas, and a terrestrial receiver is connected to a loop antenna serving as one end of the n loop antennas. A mobile position detection system in which a repeater is disposed between adjacent loop antennas among the n loop antennas arranged side by side, wherein the position is determined from the terrestrial transmitter to the terrestrial receiver. A detection signal is transmitted, and the position detection signal is transmitted from the front position detection section to a subsequent position detection section by a bucket brigade method so that the position detection signals flowing in each position detection section are different. Is, the mobile vehicle location detection system and recognizes the current position interval the moving body is a position detection section that currently exist by receiving the position detection signal. 2. The moving object position detecting system according to claim 1, wherein the moving object transmits a moving object signal representing the recognized position detecting section to the current position section, and the moving object signal is used for the position detection. A moving object position detection system, wherein the current position section of the moving object is detected on the ground side while being superimposed on a signal and received by the ground receiver. 3. An n number of loop antennas (n: a positive integer of 2 or more) formed by winding an induction wire once, and one position detection section is formed by one loop antenna. A terrestrial transmitter is connected to a loop antenna serving as one end of the n loop antennas, and a terrestrial receiver is connected to a loop antenna serving as one end of the n loop antennas. A repeater is disposed between adjacent ones of the n loop antennas arranged side by side; a position detection signal is transmitted from the terrestrial transmitter to the terrestrial receiver; The detection signal is transmitted by a bucket brigade method from the front position detection section to the succeeding position detection section, so that the position detection signal flowing in each position detection section is different, and the moving object is the position detection signal. Mobile location detecting method, characterized in that the moving body to recognize the current position interval is a position detection section that currently exist by receiving. 4. The moving body position detecting method according to claim 3, wherein the moving body transmits a moving body signal indicating the recognized position detecting section to the current position section, and the moving body signal is used for the position detection. A method for detecting a position of a moving object, wherein the current position section of the moving object is detected on the ground side while being superimposed on a signal and received by the ground receiver.