JPH1038587A - Present position detecting device for moving body by infrared transmission and reception system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a present position detecting device for moving body by an infrared transmission and reception system which detects the present position of the moving body not by discriminating and sensing a moving point as a 'point', but by narrowing down the range of the presence of the moving body from both before and behind the moving body by a simple means. SOLUTION: A forward infrared-ray radiator 2 and a backward infrared-ray radiator 3 which are installed on the side of the moving body 1 radiate forward infrared rays 14 and backward infrared rays 15 at proper radiation angles in proper radiation directions. On a pole 4 on a movement path side, a forward infrared-ray receiver 5 and a backward infrared-ray receiver 5 which receive the forward and backward infrared rays are arranged and receive the radiated infrared rays. In this case, an intermediate point between the forward infrared- ray receiver 5 and backward infrared-ray receiver 6 is judged by a computer included in a control part 7 to decide the present position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the current position of a moving object such as a train, a train, an automobile, etc. by an infrared transmitting / receiving method. The present invention relates to a device for detecting a current position of a moving object.

[0002]

2. Description of the Related Art As a method of detecting the current position of a moving body moving on a track or a road, a track circuit system in a train or a train, a transmitter / receiver installed on a road surface or a side wall, and a method mounted on the moving body. There are an electromagnetic communication method with a transmitter / receiver, a radio communication method and an ultrasonic communication method in the case of an automobile, and the like, and all of them attempt to directly detect a moving object as a target as a “point”.

[0003]

In the conventional systems, in order to detect a moving object as a "point", identification and detection of information by contact or proximity or identification and acquisition of information in an individual dialog system by mobile communication or the like are performed. Therefore, if an attempt is made to improve the accuracy and density of position detection, the equipment becomes complicated and expensive as a whole. In particular, when the moving object is a car, it is virtually impossible to automatically identify and detect each car individually, except by taking a camera at the toll collection gate point. Impossible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to be able to appropriately determine the current position of a moving object by relatively simple means. An object of the present invention is to provide a current position detecting device for a moving object by an infrared transmission / reception method for detecting a current position by narrowing down a range of existence of the moving object from both the front and the rear, not detecting the moving object.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is a detection device for automatically detecting a current position of a moving body moving on a track or a road, and comprising: An infrared receiver disposed along a road, an infrared radiator disposed on the side of the moving body, and control for automatically determining and outputting the current position of the moving body based on a signal received from the infrared receiver. And the infrared radiator is configured to emit infrared rays at an appropriate radiation angle and radiation direction in the forward and backward directions of the moving body, and the control unit is configured to control the moving direction of the moving body. A current position detection device of a moving body by an infrared transmission / reception method which calculates an intermediate position between the reception signal by the infrared ray and the reception signal by the infrared ray in the backward direction and outputs the calculated position as the current position of the moving body. . Further, the moving body is a train, a train, a car, or the like, and the infrared receiver and the radiator are a front and a rear, and a current position detecting device of the moving body by an infrared transmitting / receiving method is characterized by the above-mentioned. Is what you do.

[0006] Infrared rays are radiated from the infrared radiator of the moving body in the moving forward and backward directions. This infrared light is received by a plurality of infrared receivers disposed on the side of the moving path of the moving body. As described above, the moving body emits infrared light in the forward and backward directions, and is adjacent to the moving body. Among the receiving conditions of the infrared receiver placed,
A state occurs in which no infrared light in the forward direction from the moving body is received and a state in which no infrared light in the backward direction is received.
The states can be logically partially overlapped.
The midpoint between the two states will represent the current position of the mobile at that moment. Therefore, the present position can be detected more easily and relatively accurately than the conventional method of detecting a moving object as a “point”.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention for detecting a current position of a moving object by an infrared transmission / reception system will be described in detail with reference to the drawings. In the following embodiments, two infrared radiation units and two infrared reception units are arranged as a set,
One is for forward travel and the other is for reverse travel. In the following, means for distinguishing between forward use and reverse use,
Means for distinguishing each moving object assuming a plurality of moving objects are described for convenience of explanation.

As shown in FIG. 1, a moving body 1 is provided with a forward infrared radiator 2 (shown by a in the figure) and a backward infrared radiator 3 (shown by b in the figure). Is done. On the other hand, a large number of poles 4
And a forward infrared receiver 5 (shown by a) and a reverse infrared receiver 6 (shown by b) are provided on each pole 4.
Is arranged.

On the other hand, the control unit 7 controls the forward direction infrared receiver 5
It is connected to the infrared receiver 6 in the reverse direction and determines the current position of the mobile unit 1 from the received signals.

As shown in FIG. 1, infrared rays are radiated from a forward moving infrared radiator 2 and a backward moving infrared radiator 3 of a moving body 1 at an appropriate radiation angle in a forward moving direction and a backward moving direction and in a radiation direction. As an example, the radiation angle is 45 to 75 degrees, and between the forward-direction infrared ray 14 radiated in the forward direction and the backward-direction infrared ray 15 radiated in the backward direction, radiation of an infrared ray having a moderate angle in the case of this example. A space 8 not formed is formed. However, it is not an eye of the present invention that the space portion 8 that does not emit light is formed.

FIG. 2 is a block diagram showing a more detailed configuration of each component shown in FIG. The infrared radiating section 9 on the moving body 1 side includes, for example, a pulse driving circuit 10, a forward polarizing filter 11, a backward polarizing filter 12, the forward infrared radiator 2 and the backward infrared radiator 3 described above. These are connected to an in-vehicle power supply 13. When the moving body 1 is an automobile, for example, a specific signal such as a bar code corresponding to a license plate number is supplied to the pulse driving circuit 10.
Are introduced into the forward polarization filter 11 and the backward polarization filter 12, and the forward infrared ray 14 and the backward infrared ray 15 are produced.

The forward-direction infrared radiator 2 and the backward-direction infrared radiator 3 which actually emit the forward-direction infrared radiation 14 and the backward-direction infrared radiation 15 are shown in FIG. The following are used. It comprises a case body 17 having an opening 16 as shown, in which a forward-direction infrared radiator 2 and a backward-direction infrared radiator 3 are housed. The opening 16 is for radiating infrared rays having a predetermined radiation angle to the outside. In addition, by setting a strict radiation angle and arranging the receivers without any gaps on the wall of the platform of the station, it can be effectively used as a position detection for stopping a train or a train at an accurate position to a fine level. .

As shown in FIG. 2, a fixed infrared receiving unit 1
Numeral 8 comprises a number of infrared receivers as described above. For convenience of explanation, the forward infrared receiver 5 which has received the forward infrared 14, the backward infrared receiver 6 which has received the backward infrared 15, and Depending on the distance between the corner and the receiver, it comprises a non-sensing receiver 19 which does not receive infrared rays as shown in the figure. These are connected to the control unit 7 by the reception signal transmission cable 20.

As shown in FIG. 2, the control section 7 comprises a computer 21 and a moving body position determining device 22, and performs position determination by the following method. That is, assuming that the moving body 1 is at the position shown in FIG. 1, the forward-direction infrared ray 14 from the forward-direction infrared radiator 2 on the side of the moving body 1 is received by the forward-direction infrared receiver 5, and the received signal is received. Is input to the computer 21 of the control unit 7. On the other hand, the backward infrared ray 15 from the backward infrared radiator 3 of the moving object 1 is received by the backward infrared
Is input to On the other hand, in the case of this example,
4 and the space 8 at the midpoint between the backward infrared rays 15 (FIG. 1).
), No infrared signal is emitted, and no reception signal is generated at the non-sensing receiver 19 located at a position facing the space 8. However, the position is not the exact current position of the moving object 1 and the computer 21
The instantaneous point between the closest device of the mobile device 1 and the closest device of the backward direction infrared receiver 6 can be instantaneously determined, whereby the instantaneous position of the moving object 1 is detected. By repeatedly performing the same operation, the position of the moving body is sequentially detected.

The present invention judges the position of the intermediate point between the two kinds of sensing states as compared with the conventional moving object position detecting means. Even if the positional relationship between the moving object 1 and the infrared receiver is slightly shifted. You can easily find the current location. In addition, the forward direction infrared 1
Even if the radiation direction and the radiation angle of the infrared rays 4 and the backward direction infrared 15 slightly vary, it is sufficient to determine the intermediate point between the front and rear reception ranges, and the accurate current position can be detected.

[0016]

【The invention's effect】

1) According to the present position detecting device of the present invention, infrared rays are radiated from the moving body side in the forward and backward directions at an appropriate radiation angle and radiation direction, and the two kinds of infrared radiations are transmitted to the infrared ray receiving unit on the moving road side. It is possible to detect a substantially accurate current position of the moving object by a simple means of detecting and setting an intermediate position as the current position of the moving object. 2) According to the present position detecting device of the present invention, the moving object is a train, a train, an automobile, or the like, and can be applied to almost all moving objects running on the ground. 3) According to the current position detecting device of the present invention, contact between the infrared transmitter and the plurality of receivers is established in the longitudinal direction of the moving body, so that reception errors are reduced. Effective. In order to further increase the reliability, the number of infrared transmitters mounted on the moving object may be increased.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of a present position detection device for a moving object of the present invention.

FIG. 2 is a block diagram of each component of FIG. 1;

FIG. 3 is a perspective view showing an example of a practical form of an infrared radiation section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Moving body 2 Forward infrared radiator 3 Reverse infrared radiator 4 Pole 5 Forward infrared receiver 6 Reverse infrared receiver 7 Control part 8 Space part 9 Infrared radiation part 10 Pulse drive circuit 11 Forward polarization filter 12 Reverse Directional polarization filter 13 In-car power supply 14 Forward-direction infrared ray 15 Reverse-direction infrared ray 16 Opening 17 Case body 18 Fixed-type infrared receiver 19 Non-sensing receiver 20 Received signal transmission cable 21 Computer 22 Moving object position determination device

Claims (3)

[Claims] 1. A detecting device for automatically detecting a current position of a moving body moving on a track or a road, comprising: an infrared receiver disposed along a moving path of the moving body; An infrared radiator provided, and a control unit that automatically determines and outputs the current position of the moving object based on a reception signal from the infrared receiver, and the infrared radiator is arranged in a forward direction of the moving object. The control unit is configured to emit an infrared ray having an appropriate radiation angle and a radiation direction toward the backward direction, and the control unit is configured to receive an intermediate signal between the reception signal using the infrared ray in the forward direction and the reception signal using the infrared ray in the backward direction of the moving body. An apparatus for detecting a current position of a moving object by an infrared transmission / reception method, which calculates a position and outputs the position as a current position of the moving object. 2. The current position detecting device for a moving body according to claim 1, wherein the moving body is any one of a train, a train, a car, and the like. 3. An infrared receiver and a radiator comprising two front and rear infrared receivers.
3. A device for detecting a current position of a moving object by the infrared transmission / reception method according to 2.