JP2003285740A - Accident preventing device for maintenance vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To measure an isolation distance and come to a stop before collision without fail by enabling a light from a preceding maintenance vehicle to be received by a following maintenance vehicle. <P>SOLUTION: This accident preventing device comprises two visible light or heating coil emitters 3A, 3B mounted at the rear end of the preceding maintenance vehicle in certainly spaced relation, a visible light or heating coil receiver 8 mounted on the following maintenance vehicle 2, and a controller 9 for computing the isolation distance L between a light receiving signal from the following maintenance vehicle 2 and the preceding maintenance vehicle 1 and outputting a braking signal depending on the computed distance. The controller 9 computes the isolation distance L by detecting an angle θ formed by the two emitters 3A, 3B on the preceding maintenance vehicle 1. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention accurately determines the separation distance from a preceding maintenance vehicle or the distance to a working section while a maintenance vehicle used for construction of railway tracks or overhead lines and maintenance and inspection work is running. The present invention relates to an accident prevention device for a maintenance vehicle, which is measured in order to prevent collision between maintenance vehicles or entry into a work section.

[0002]

2. Description of the Related Art Usually, in the case of a train, the two rails on the left and right are electrically short-circuited to each other. Therefore, by measuring the resistance value within one block section between the traffic signals,
It is possible to detect whether or not a train has entered a certain closed section. That is, the position of the train can be automatically detected for each closed section. Then, when a train enters a certain closed section, the traffic lights and turnouts are automatically switched so that the following train does not enter, and its operation is automatically prevented to prevent a train collision accident. It is managed.

However, when a maintenance vehicle such as railroad rail or sleeper replacement, ballast tamping work, overhead wire inspection and replacement work, etc. is used, a plurality of maintenance cars simultaneously enter one closed section. In many cases, the desired work is performed. Also, because of the relationship with the base and the place where the work is performed,
The maintenance car may travel on the track in the direction opposite to the traveling direction of the train (reverse line travel), and the method of collision prevention by short-circuit running used in the train cannot be used.

Therefore, in order to avoid collisions between maintenance vehicles and prevent entry into the work section, the automatic train stop device cannot be used, and the operator is left to the brake operation. The current situation. In addition, as a device to assist the operator's operation, a maintenance vehicle approach warning device that automatically sounds an alert sound when approaching another maintenance vehicle, or an alarm sound is issued every 30 seconds to confirm. There is known a drowsiness prevention device or the like which is adapted to apply an emergency braking when it is not handled. The maintenance vehicle approach warning device receives a radio wave transmitted from a transmitter mounted on the preceding vehicle by a receiver mounted on the following vehicle, so as to know that the following vehicle has approached the preceding vehicle. On the other hand, in the conventional case, the distance from the preceding vehicle is emitted from the following vehicle, and the following vehicle receives the laser light reflected by the preceding vehicle and the distance between the vehicles is determined by the phase difference between the transmitted light and the received light. It is also known to measure the vehicle so as to know the approach of the vehicle.

[0005]

The operator is only managed by the handling procedure that depends only on the human system check, and the maintenance vehicles collide with each other due to human error such as forgetfulness or mistake in handling. There was a risk of accidents or accidental entry into the work area. In particular, maintenance vehicles are often carried out at night when trains are open, under conditions where fatigue is likely to occur, human error is likely to occur, and it is difficult to check the situation at the work site. , It was screaming to take some measures.

In the case of the maintenance vehicle approach warning device, since the wireless is used, the detection range of the maintenance vehicle approach warning device may change depending on environmental conditions such as a tunnel, or depending on the maintenance vehicle approaching from behind the same line. Since it also sounds, there is a drawback in that the distance to the preceding vehicle required to prevent a brake operation error cannot be accurately detected. On the other hand, the snooze prevention device is not a device that reliably stops before a collision or before an inaccessible section because there is a blank time of 30 seconds while repeating the alarm ringing and confirmation treatment every 30 seconds. It was Furthermore, in the method of measuring the separation distance by receiving the reflected wave of the laser beam from the preceding vehicle, it is not possible to determine whether the preceding vehicle is on the up line or the down line, and on the other side of the track. There was a problem that unnecessary operation such as emergency braking was measured by measuring the maintenance vehicle.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art and has been improved and eliminated. The visible light or the heat ray emitted from the light emitter is received by a maintenance vehicle to separate the visible light or the heat ray. It is an object of the present invention to provide an accident prevention device for a maintenance vehicle, which measures a distance and can surely stop before a collision.

According to the first aspect of the present invention, the two visible light or heat ray light emitters mounted on the rear end of the preceding maintenance vehicle at a predetermined distance from each other and the subsequent maintenance vehicle are mounted. The visible light or heat ray receiver, and calculates the separation distance of the preceding maintenance vehicle from the received signal of the subsequent maintenance vehicle,
The maintenance vehicle is configured to calculate a separation distance by detecting an angle formed by two light emitters of a preceding maintenance vehicle, the controller including a controller that outputs a braking signal or the like according to the calculated distance. This is an accident prevention device. In this way, the angle formed by the two light emitters of the preceding maintenance vehicle that are separated by a predetermined distance changes depending on the separation distance from the following maintenance vehicle. Therefore, it is possible to accurately calculate the separation distance between the two vehicles by detecting the angle. Further, since it is the projection and reception of visible light or heat rays, it is possible to accurately measure the separation distance without causing interference in the tunnel unlike radio waves.

According to a second aspect of the present invention, two light-emitters for visible light or heat rays are installed on the end side of the work section at a predetermined distance, and a light-emitter for visible light or heat rays installed in a maintenance vehicle. , A controller for outputting a braking signal or the like of the maintenance vehicle, and the controller calculates the separation distance between the maintenance vehicle and the working section by detecting the angle formed by the two light emitters received by the light receiver. An accident prevention device for a maintenance vehicle, which outputs a braking signal or the like to the maintenance vehicle according to the calculated distance. The present invention has the same structure and function as described in claim 1 except that the light emitter is installed on the side of the working section of the track and the light receiver is installed on the maintenance vehicle. Same as the case.

According to a third aspect of the present invention, the controller compares the separation distance to the preceding maintenance vehicle or track side work section with the speed and brake curve of the maintenance vehicle of its own, and outputs a braking signal. An accident prevention device for a maintenance vehicle according to item 1 or 2. By comparing the separation distance of the maintenance car before or after or the separation distance with the equipment installed on the track side with the speed and brake curve of the maintenance car of its own, there is no alarm range or alarm range depending on the separation distance and speed. , The brake control area, etc., and when entering the alarm area, a warning is issued in advance and a warning is issued to reduce the speed.In the brake control area, emergency brakes are applied to collide maintenance vehicles or to work areas. I am trying to make sure to avoid entry.

According to a fourth aspect of the present invention, the maintenance vehicle traveling on the up line and the down line uses different frequencies of visible light or heat rays. It is the described collision prevention device. By making the operating frequency of visible light or heat ray different between the up line and the down line, there is no interference between the upper and lower lines, and unnecessary braking or the like does not work.

According to a fifth aspect of the present invention, visible light or heat rays are modulated and used.
The maintenance vehicle accident prevention device described in. By modulating and using the visible light or the heat ray in this way, the signal of the visible light or the heat ray and the noise of the visible light or the heat ray can be discriminated, and the malfunction due to the noise can be prevented. Also, by changing the modulation frequency of visible light or heat rays, it is possible to distinguish between the up line and the down line.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The structure of the present invention will be described below based on the embodiments of the invention shown in the drawings. 1 to 7 relate to a first embodiment of the present invention. FIG. 1 is a block diagram showing a configuration of an accident prevention device for a maintenance vehicle, and FIG. 1) the preceding vehicle) and the following maintenance vehicle (hereinafter referred to as the following vehicle)
2 is a view showing a state in which the separation distance from the vehicle 2 is being measured, and FIG. 3 is a view for explaining the principle of measuring the separation distance between the preceding vehicle 1 and the following vehicle 2. FIG. 4A is a drawing of the case where the separation distance between the preceding vehicle 1 and the following vehicle 2 is long as viewed from the following vehicle 2, and FIG. 4B is a drawing when the separation distance is short. FIG. 5 is a flow chart of an accident prevention device for a maintenance vehicle according to the present embodiment, FIG. 6 is a drawing showing a control pattern of a following vehicle 2, and FIG. 7 is a diagram for explaining the distinction between an up line maintenance vehicle and a down line maintenance vehicle. It is a drawing for.

As shown in FIG. 1, the accident prevention device for a maintenance vehicle according to the present embodiment is provided on the rear side of the preceding vehicle 1, for example, 2
The light emitting devices 3A and 3B that are separated by a fixed distance such as m
The light receiver 4 is similarly arranged toward the following vehicle 2 side between the light emitters 3A and 3B. The light emitters 3A and 3B and the light receiver 4 are connected to the controller 5
Is connected to the light source 3A, 3 from the controller 5
A light emission signal is output to B and a light reception signal from the light receiver 4 is input to the controller 5.
The controller 5 is connected to a power source, a speed generator, an advancing direction (forward or backward) output device, etc. to input speed information, advancing direction information, etc., and is also connected to a brake control device. It slows down (brakes). Further, the controller 5 is connected to the operation / display panel 6, and the operation condition of the preceding vehicle 1 is input to the controller 5 through the operation / display panel 6 or the information input to the controller 5 is displayed. ing.

On the other hand, the following vehicle 2 has a light emitter 7 on its front side.
The structure is the same as that of the preceding vehicle 1 except that A, 7B and the light receiver 8 are arranged. For convenience of explanation, the following car 2
9 for controller and 1 for operation / display panel
0 shall be added. In the present embodiment,
For convenience of description, the case where the accident prevention device for the maintenance vehicle is arranged on the rear side of the preceding vehicle 1 and the front side of the following vehicle 2 has been described. However, in the actual maintenance vehicle, The vehicle also performs forward and backward movements, and each of the maintenance vehicles has the above-described accident prevention device for the vehicle maintenance vehicle incorporated therein.

Next, an operation mode of the accident prevention device for a maintenance vehicle thus configured will be described based on the flowchart of FIG. 5 and the control pattern of FIG. First, the following car 2
The operator turns on the ignition key to activate the following vehicle 2. This turns on the buzzer,
Invite them not to forget the next task. That is, the operation / display panel 10 is used to manually set which of the upper and lower lines the following vehicle 2 enters or exists. This setting is reflected in the controller 9, and the operation / display panel 10
Is displayed in. This turns off the buzzer.

From this state, as shown in FIG.
When the following vehicle 2 approaches this with the preceding vehicle 1 stopped, a collision will eventually occur. Therefore, the following vehicle 2 constantly measures the separation distance from the preceding vehicle 1. The measurement method is as shown in FIG. 3, and the angle θ formed by visible light (for example, near-infrared light) emitted from the light emitters 3A and 3B of the preceding vehicle 1 by the light receiver 8 of the following vehicle 2 or a heat ray is formed. To measure. If the method is to measure the angle θ of visible light or heat rays, the detection range will not change even when the maintenance vehicle is entering the tunnel, and the maintenance vehicle from the rear will not change. There is no problem such as interference due to the above, and reliable detection is possible.

The distance between the light emitters 3A and 3B of the preceding vehicle 1 is
For example, the distance is constant at 2 m, and the separation distance L from the preceding vehicle 1 to the preceding vehicle 1 can be calculated by the following equation. That is, the separation distance L is calculated by L = (M / 2) / Tan (θ / 2), where M is the distance 2 m between the light emitters 3A and 3B. The controller 9 of the following vehicle 2 includes the light receiver 8
Is continuously monitored to calculate the separation distance L to the preceding vehicle 1 and displayed on the operation / display panel 10.
Note that the angle θ becomes narrower when the separation distance L is longer as shown in FIG. 4A, and becomes wider when the separation distance L is closer as shown in FIG.

The controller 9 calculates the respective distances L and the speed input from the speed generator,
Continuously check the braking performance curve of the following vehicle 2,
I try to apply an alarm and emergency brakes. For example,
When the separation distance L is in the range of 500 m to 300 m, the following vehicle 2
Does not treat the brakes even if it is approaching the preceding vehicle 1 at 30 km / h, but if it is within 300 m, the speed will change to 3
The operator is notified through the operation / display panel 10 to decelerate to 0 km / h or less. If the vehicle does not decelerate, forcibly perform the brake control and confirm that it stops for a few seconds or longer. Also, if the separation distance L is within 300 m, the operator is 30 km / h.
After decelerating to the following, confirm the stop once. And 1
When approaching the preceding vehicle 1 at a speed of less than 5 km / h, the vehicle is approaching at the slowest speed, and it is judged that the emergency stop operation is possible at any time, and no alarm or brake output is given.

When the separation distance L is within 300 m, the vehicle is not stopped or once stopped, but when the speed is not reduced to less than 15 km / h, it is determined that the collision avoidance operation is necessary.
If the alarm range is still further (for example, when the separation distance L is 185 m or less), an alarm is sounded by an alarm, and then the brake control range (for example, the separation distance L is 1
(When the distance is within 45 m), the brake control is performed and the emergency brake is automatically output. And
Check the stop for a few seconds or more. This is repeated until a stop of several seconds or more is confirmed. As described above, in the present embodiment, since the separation distance L can be calculated reliably and accurately, it is possible to automatically perform control such as sounding an alarm or applying an emergency brake. It is possible to reliably prevent the vehicle 2 from colliding with the preceding vehicle 1.

By the way, as shown in FIG. 7, visible light or heat rays emitted from the light emitters of the maintenance vehicle 11 on the ascending line are received by the light receiver 8 of the following vehicle 2 on the descending line and interfere with each other. There is fear. In the present embodiment, in view of the above, the operating frequency of the light emitter is changed between the upper and lower lines,
I try not to interfere with each other. Also, after modulating the operating frequency of visible light or heat rays of the light emitter between the upper and lower lines,
It is also possible to avoid interference between the upper and lower lines by using different modulation frequencies for the upper and lower lines. In addition, in this case, it is possible to prevent malfunction due to noise of visible light or heat rays.

FIG. 8 is a view showing the arrangement of the apparatus according to the second embodiment of the present invention. As shown in the figure, in this embodiment, the light emitters 13 are installed at both ends of the work section S, and the light receivers 14 are installed in the maintenance vehicle 12.
The equipment configuration of the maintenance vehicle 12 is the same as that of the preceding vehicle 1 or the following vehicle 2 shown in FIG. In the second embodiment, the controller mounted on the maintenance vehicle 12 processes the signal from the light receiver 14 to calculate the distance to the work section S,
The maintenance vehicle 12 is surely prevented from entering the work section S by outputting a braking signal or the like. Other functions and effects are the same as those in the case of the first embodiment.

[0023]

As described above, the accident prevention device for a maintenance vehicle according to claim 1 of the present invention has two types of visible light or heat rays installed at a predetermined distance on the rear end side of the preceding maintenance vehicle. One light emitter, the visible light or heat ray receiver attached to the subsequent maintenance vehicle, and the separation distance between the preceding maintenance vehicle from the received signal of the subsequent maintenance vehicle is calculated, and the calculated distance is calculated according to the calculated distance. And a controller that outputs a braking signal or the like. The controller calculates the separation distance by detecting the angle formed by the two light emitters of the preceding maintenance vehicle. The angle formed by the two light emitters of the preceding maintenance vehicle, which are separated by a predetermined distance, changes depending on the separation distance from the following maintenance vehicle. Therefore, it is possible to accurately calculate the separation distance between the two vehicles by detecting the angle. In addition, it emits and receives visible light or heat rays, and does not cause interference in the tunnel like radio waves,
It is possible to measure the separation distance accurately.

Further, in the invention of claim 2 of the present invention,
Except that the light emitter is installed on the side of the work section end of the track and the light receiver is installed on the maintenance vehicle, the configuration and action are the same as in the case of the invention of claim 1. is there. According to the second aspect of the present invention, it is possible to reliably prevent the maintenance vehicle from entering the working section.

Further, in the means of claim 3 of the present invention, the controller collates the separation distance from the preceding maintenance vehicle or work section with the speed and brake curve of the maintenance vehicle of its own, and outputs the braking signal. It is outputting. By comparing the separation distance with the speed and brake curve of the maintenance vehicle, it is divided into a non-alarm area, an alarm area, a brake control area, etc. according to the separation distance and speed, and when the alarm area is entered. It is possible to reliably avoid a collision by issuing an alarm in advance and issuing a warning to reduce the speed and applying an emergency brake in the brake control range.

According to the fourth and fifth means adopted by the present invention, the operating frequency or modulation frequency of visible light or heat rays of the maintenance vehicle traveling on the up line and the down line is made different. By making the use frequency or the modulation frequency of the visible light or the heat ray different between the up line and the down line, there is no interference between the upper and lower lines, and unnecessary braking or the like does not work. Further, when the modulation frequency is used, there is an advantage that it is not affected by noise of visible light or heat rays.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a collision prevention device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a state in which a preceding maintenance vehicle and a subsequent maintenance vehicle separation distance according to the first embodiment of the present invention are being measured.

FIG. 3 is a diagram for explaining a principle of measuring a separation distance between a preceding maintenance vehicle and a subsequent maintenance vehicle according to the first embodiment of the present invention.

FIG. 4 relates to the first embodiment of the present invention, and FIG. 4A shows a case where a preceding maintenance vehicle and a subsequent maintenance vehicle have a large separation distance from a subsequent maintenance vehicle. It is a drawing and Drawing (B) is a drawing in case the separation distance is short.

FIG. 5 is a flowchart of the collision prevention device according to the first embodiment of the present invention.

FIG. 6 is a view showing a control pattern according to the first embodiment of the present invention.

FIG. 7 relates to the first embodiment of the present invention, and is a drawing for explaining the distinction between an up line maintenance vehicle and a down line maintenance vehicle.

FIG. 8 relates to the second embodiment of the present invention and is a drawing showing a relationship between a work section and a maintenance vehicle.

[Explanation of symbols]

1 ... Leading maintenance vehicle, 2 ... Trailing maintenance vehicle, 3A, 3
B ... Light emitter, 4 ... Light receiver, 5 ... Controller, 6 ... Operation / display board, 7A, 7B ... Light emitter, 8 ... Light receiver, 9 ... Controller, 10 ... Operation / display board

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Jun Anekawa             2-4-24 Shibata, Kita-ku, Osaka City Travel to West Japan             Customer Railway Co., Ltd. (72) Inventor Akihiro Takei             2-4-24 Shibata, Kita-ku, Osaka City Travel to West Japan             Customer Railway Co., Ltd. (72) Inventor Yoshinobu Yamaguchi             2-4-24 Shibata, Kita-ku, Osaka City Travel to West Japan             Customer Railway Co., Ltd. (72) Inventor Motohei Watanabe             2-21-6-1007 Higashiikebukuro, Toshima-ku, Tokyo F term (reference) 2F112 AD05 BA18 CA05 DA02 DA32                 5H115 PA08 PC02 PG01 QE20 SF18                       SJ08 TB03 TD10 TR17 TU20                       TZ02 TZ07 UB05 UI40                 5H161 AA01 BB07 CC20 DD21 DD22                       DD31 EE02 EE04 EE20 GG04

Claims (5)

[Claims] 1. A visible light or heat ray light emitter mounted on a rear end side of a preceding maintenance vehicle at a predetermined distance, and a visible light or heat ray light receiver attached to a subsequent maintenance vehicle,
A controller that calculates the distance from the preceding maintenance vehicle from the received light signal of the subsequent maintenance vehicle and outputs a braking signal or the like according to the calculated distance, the controller comprising:
An accident prevention device for maintenance vehicles that calculates the separation distance by detecting the angle formed by two light emitters of the preceding maintenance vehicle. 2. A visible light or heat ray light emitter installed at a predetermined distance on the end side of the working section, the visible light or heat ray light receiver installed in a maintenance vehicle, and a maintenance vehicle braking. The controller outputs a signal or the like, and the controller calculates the separation distance between the maintenance vehicle and the work section by detecting the angle formed by the two light-emitters received by the light-receiver, and calculates the distance according to the calculated distance. An accident prevention device for maintenance vehicles that outputs braking signals to maintenance vehicles. 3. The controller according to claim 1 or 2, wherein the controller compares the separation distance to the preceding maintenance vehicle or the track side work section with the speed and brake curve of the maintenance vehicle of its own and outputs a braking signal. Accident prevention device for maintenance vehicle as described. 4. The accident prevention device for a maintenance vehicle according to any one of claims 1 to 3, wherein the maintenance vehicle traveling on the up line and the down line uses different frequencies of visible light or heat rays. 5. The accident prevention device for a maintenance vehicle according to claim 1, wherein visible light or heat rays are modulated and used.