JP3903218B2 - Accident prevention device for maintenance vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention accurately measures a separation distance from a preceding maintenance vehicle or a distance to a work section while a maintenance vehicle used for construction and maintenance inspection work of railway tracks and overhead lines, etc. The present invention relates to an accident prevention apparatus for maintenance vehicles that prevents collisions between them or entry into a work section.
[0002]
[Prior art]
Normally, in the case of a train, since the train electrically short-circuits the two rails on the left and right, the train enters a certain blockage section by measuring the resistance value in the blockage section between the traffic lights. It is possible to detect whether or not. That is, it is possible to automatically detect the position of the train for each closed section. And 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 the operation is carried out so as to automatically prevent a train collision accident. It is managed.
[0003]
However, when using maintenance vehicles such as railroad rail and sleeper replacement, ballast tamping work, overhead wire inspection and reworking work, multiple maintenance cars enter the closed section at the same time. There are many cases where work is performed. In addition, due to the relationship between the base and the place where the work is performed, the maintenance vehicle may travel on the track in the direction opposite to the direction of travel of the train (reverse travel). Prevention methods are not available.
[0004]
Therefore, in order to avoid collision between maintenance vehicles or to prevent entry into the work section, the automatic train stop device cannot be used, and it is left to the operator's brake operation at present. .
Also, as a device that assists the operator's operation, a maintenance vehicle approach warning device that automatically sounds a warning sound when approaching another maintenance vehicle, or a warning sound that sounds every 30 seconds for confirmation A snooze prevention device or the like is known in which emergency braking is applied when it is not handled. The maintenance vehicle approach warning device receives a radio wave transmitted from a transmitter mounted on a preceding vehicle by a receiver mounted on the succeeding vehicle so as to know that the succeeding vehicle has approached the preceding vehicle.
On the other hand, conventionally, a laser beam is emitted from the following vehicle at a separation distance from the preceding vehicle, and the following vehicle receives the laser beam reflected by the preceding vehicle, and the separation distance between the vehicles is determined by the phase difference between the transmitted light and the receiving light. It is also known to measure and know the approach of the vehicle.
[0005]
[Problems to be solved by the invention]
In the case of an operator, it is only managed by handling procedures that depend only on human checks. Due to human error such as mishandling or mistakes in handling, maintenance vehicles collide or erroneously enter work sections. There was a risk of causing an accident. In particular, maintenance vehicles are often used at nights when trains are not in operation, because they are subject to fatigue, are prone to human error, and are difficult to check at work sites. Screamed to take some measures.
[0006]
In the case of a maintenance vehicle approach warning device, since it uses radio, its detection range changes due to environmental conditions such as tunnels, or it rings even with maintenance vehicles approaching from behind the same line For this reason, there is a drawback in that it is impossible to accurately detect the distance to the preceding vehicle necessary for preventing a brake operation error.
On the other hand, the dozing prevention device is not a device that reliably stops before the collision or before the entry-prohibited section because there is a 30-second blanking time even during repeated alarms and confirmations 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 opposite line. There was a problem that unnecessary operations such as emergency braking occurred by measuring the maintenance vehicle of the vehicle.
[0007]
[Means for Solving the Problems]
The present invention is an improvement and removal in view of the above-mentioned problems, and measures the separation distance by receiving visible light or heat rays emitted from a light emitter with a maintenance vehicle, before the collision. We intend to provide an accident prevention device for maintenance vehicles that can be stopped reliably.
[0008]
The means according to claim 1 employed by the present invention comprises two visible light or heat ray emitters attached to a rear end side of a preceding maintenance vehicle at a predetermined distance, and the visible light attached to a subsequent maintenance vehicle. Or a controller that calculates a separation distance between the preceding maintenance vehicle from a received light signal of a subsequent maintenance vehicle and outputs a braking signal and / or an alarm according to the calculated distance. by detecting two angles of light emitter forms a maintenance vehicle preceding state, and are not for calculating the distance, a maintenance vehicle traveling a maintenance vehicle and a down line which runs up line A maintenance vehicle accident prevention device characterized in that the use frequency of visible light or heat rays is varied .
Angle which the two light emitters spaced a predetermined distance maintenance vehicles which previously row forms varies with separation distance between subsequent maintenance vehicles. Therefore, it is possible to accurately calculate the separation distance between the two vehicles by detecting the angle. Moreover, it is visible light or heat ray projection / reception, and it can accurately measure a separation distance without causing interference in a tunnel unlike radio waves.
In addition, by making the use frequency of visible light or heat rays different between the up line and the down line, there is no interference between the upper and lower lines, and no unnecessary braking or the like works.
[0009]
According to a second aspect of the present invention, there are provided two visible light or heat ray emitters attached to a rear end side of the preceding maintenance vehicle at a predetermined distance, and the visible light or heat ray reception attached to the subsequent maintenance vehicle. And a controller that calculates a separation distance between the preceding maintenance vehicle from the received light signal of the subsequent maintenance vehicle and outputs a braking signal and / or an alarm according to the calculated distance. By detecting the angle formed by the two light emitters of the maintenance vehicle, the separation distance is calculated. The visible light or heat rays used are modulated and the maintenance vehicle traveling on the up line and the down line are traveling. A maintenance vehicle accident prevention apparatus characterized in that the modulation frequency is different from that of the maintenance vehicle.
By modulating visible light or heat rays, visible light or heat ray signals can be distinguished from visible light or heat ray noise, and malfunction due to noise can be prevented. Further, by changing the modulation frequency of visible light or heat rays, it is possible to distinguish between uplink and downlink.
[0010]
The means of claim 3 includes two visible light or heat ray emitters mounted at a predetermined distance on the end side of the work section, the visible light or heat ray receiver installed in the maintenance vehicle, and a maintenance vehicle. A controller that outputs a braking signal and / or an alarm for the vehicle, the controller calculates a separation distance between the maintenance vehicle and the work section by detecting an angle formed by the two light emitters received by the light receiver, A maintenance vehicle accident that outputs a braking signal and / or alarm to the maintenance vehicle according to the calculated distance, and has different operating frequencies of visible light or heat rays between the up line and down line Prevention device.
This invention is the same as the invention of claim 1 except that the light emitter is installed at the end of the work section of the track and the light receiver is installed in the maintenance vehicle. The same.
[0011]
The means of claim 4 includes two visible light or heat ray light emitters attached to the end of the work section at a predetermined distance, the visible light or heat ray light receiver installed in the maintenance vehicle, and a maintenance vehicle. A controller that outputs a braking signal and / or an alarm for the vehicle, the controller calculates a separation distance between the maintenance vehicle and the work section by detecting an angle formed by the two light emitters received by the light receiver, A brake signal and / or warning is output to the maintenance vehicle according to the calculated distance, and the visible light or heat ray to be used is modulated, and the modulation frequency is made different between the upstream line and the downstream line. This is an accident prevention device for maintenance vehicles.
This invention is the same as the invention of claim 2 except that the light emitter is installed at the end of the work section of the track and the light receiver is installed in the maintenance vehicle. The same.
[0012]
According to a fifth aspect of the present invention, 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 itself and outputs a braking signal. A maintenance vehicle accident prevention device according to any one of claims 1 to 4.
By comparing the distance between the previous and subsequent maintenance vehicles or the distance from the equipment installed on the track side with the speed and brake curve of the maintenance vehicle, no warning range and warning range according to the separation distance and speed. In the brake control area, when entering the alarm area, an alarm is issued in advance and a warning is given to reduce the speed. In the brake control area, an emergency brake is applied to cause collision between maintenance vehicles or to the work section. An approach can be avoided reliably.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The configuration of the present invention will be described below based on the embodiment 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 the configuration of an accident prevention device for a maintenance vehicle. FIG. 2 is a preceding maintenance vehicle (hereinafter referred to as the maintenance vehicle). FIG. 3 shows a state in which a separation distance between a preceding vehicle 1 and a subsequent maintenance vehicle (hereinafter referred to as a following vehicle) 2 is being measured, and FIG. 3 measures a separation distance between the preceding vehicle 1 and the following vehicle 2 It is drawing for demonstrating the principle to do. FIG. 4A is a drawing when 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 flowchart of the maintenance vehicle accident prevention apparatus according to the present embodiment, FIG. 6 is a diagram showing a control pattern of the succeeding vehicle 2, and FIG. 7 is a diagram for explaining the distinction between the maintenance vehicle for the up line and the down line. FIG.
[0014]
As shown in FIG. 1, in the maintenance vehicle accident prevention apparatus according to the present embodiment, the light emitters 3A and 3B separated from each other by a predetermined distance, such as 2 m, are directed toward the succeeding vehicle 2 on the rear side of the preceding vehicle 1. It arrange | positions so that it may light-emit and the light receiver 4 is similarly arrange | positioned toward the following vehicle 2 between light-emitting device 3A, 3B. The light emitters 3A and 3B and the light receiver 4 are connected to the controller 5, and a light emission signal is output from the controller 5 to the light emitters 3A and 3B, and a light reception signal from the light receiver 4 is input to the controller 5. It has come to be. The controller 5 is connected to a power source, a speed generator, a traveling direction (forward, reverse) output device, etc., and inputs speed information and traveling direction information, etc., and is also connected to a brake control device. Decelerate (brake). The controller 5 is connected to the operation / display panel 6, and the operation conditions of the preceding vehicle 1 are input to the controller 5 through the operation / display panel 6, and information input to the controller 5 is displayed. ing.
[0015]
On the other hand, the following vehicle 2 has the same configuration as that of the preceding vehicle 1 except that the light emitters 7A and 7B and the light receiver 8 are arranged on the front side. For convenience of explanation, reference numeral 9 is assigned to the controller of the succeeding vehicle 2 and reference numeral 10 is assigned to the operation / display panel. In the present embodiment, for convenience of explanation, the case where the configuration of the maintenance vehicle accident prevention device is arranged on the rear side of the preceding vehicle 1 and the front side of the succeeding vehicle 2 has been described. In an actual maintenance vehicle, the vehicle also moves forward and backward, and each of the maintenance vehicles has the above-described accident prevention device for a car-retaining vehicle incorporated therein.
[0016]
Next, the operation mode of the accident prevention apparatus for a maintenance vehicle configured as described above will be described based on the flowchart of FIG. 5 and the control pattern of FIG. First, the operator of the succeeding vehicle 2 turns on the ignition key to start the succeeding vehicle 2. As a result, the buzzer is turned on, and the next work is reminded not to forget. That is, it is manually set on the operation / display panel 10 as to which of the upper and lower lines the subsequent vehicle 2 enters or exists. This setting is reflected on the controller 9 and displayed on the operation / display panel 10. As a result, the buzzer is turned off.
[0017]
From such a state, as shown in FIG. 2, when the succeeding vehicle 2 approaches the vehicle while the preceding vehicle 1 is stopped, a collision will eventually occur. Therefore, the following vehicle 2 continuously measures the separation distance from the preceding vehicle 1. The measurement method is as shown in FIG. 3, and an angle θ formed by visible light or heat rays (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. Measure. If the angle θ of visible light or heat rays is measured, the detection range does not change even when the maintenance vehicle is entering the tunnel, and the maintenance vehicle from the rear Therefore, there is no problem such as interference, and reliable detection is possible.
[0018]
The distance between the light emitters 3A and 3B of the preceding vehicle 1 is, for example, 2 m, and the distance L to the preceding vehicle 1 can be calculated from the angle θ by the following equation.
That is, when the distance L between the light emitters 3A and 3B is M, the separation distance L is
L = (M / 2) / Tan (θ / 2)
Is required. The controller 9 of the succeeding vehicle 2 continuously monitors the signal of the angle θ from the light receiver 8 to calculate the separation distance L to the preceding vehicle 1 and displays it on the operation / display panel 10. Note that the angle θ is narrow when the separation distance L is long as shown in FIG. 4A, and is wide when the separation distance L is short as shown in FIG.
[0019]
The controller 9 continuously checks the separation distance L calculated in this way, the speed input from the speed generator, and the brake performance curve of the succeeding vehicle 2 to apply an alarm or emergency brake. ing. For example, when the separation distance L is in the range of 500 m to 300 m, the brake is not handled even if the succeeding vehicle 2 approaches the preceding vehicle 1 at 30 km / h, but if the distance is within 300 m, the speed is 30 km / h or less. The operator is notified through the operation / display panel 10 to decelerate. If the vehicle does not decelerate, perform brake control forcibly and confirm that it has stopped for several seconds.
Further, after the separation distance L is within 300 m and the operator decelerates to 30 km / h or less, the stop is once confirmed. When approaching the preceding vehicle 1 at less than 15 km / h, it is approaching at the slowest speed, and it is determined that an emergency stop operation is possible at any time, and no alarm and brake output are performed.
[0020]
If the separation distance L is not temporarily stopped or once stopped within 300 m, but is not decelerated to less than 15 km / h, it is determined that a collision avoidance operation is necessary. Further, when the alarm range (for example, when the separation distance L is within 185 m), an alarm is sounded by an alarm, and then the brake control range (for example, when the separation distance L is within 145 m) is approached. Sometimes, brake control is performed and an emergency brake is automatically output. And confirm the stop for several seconds or more. This is repeated until a stop of more than a few seconds is confirmed.
As described above, in the present embodiment, the separation distance L can be calculated with certainty and accuracy. Therefore, 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.
[0021]
By the way, as shown in FIG. 7, there is a possibility that visible light or heat rays emitted from the light emitter of the maintenance vehicle 11 on the up line may be received and interfered by the light receiver 8 of the following vehicle 2 on the down line. is there. In the present embodiment, in view of the above, the frequency of use of the light emitters between the upper and lower lines is made different so as not to interfere with each other.
It is also possible to avoid interference between the upper and lower lines by modulating the frequency of visible light or heat rays used between the upper and lower lines and using different modulation frequencies between the upper and lower lines. is there. In addition, in this case, it is possible to prevent malfunction due to visible light or heat ray noise.
[0022]
FIG. 8 is a diagram showing a configuration of an apparatus according to the second embodiment of the present invention. As shown in the figure, in this embodiment, the light emitter 13 is installed at both ends of the work section S, and the light receiver 14 is 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 succeeding 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, and outputs a braking signal or the like, thereby generating the maintenance vehicle 12. Is surely prevented from entering the work section S. Other functions and effects are the same as those in the first embodiment.
[0023]
【The invention's effect】
As described above, the accident prevention device for a maintenance vehicle according to claim 1 or 2 of the present invention has two light emitters of visible light or heat rays attached to the rear end side of the preceding maintenance vehicle at a predetermined distance. And the distance between the visible light or heat ray receiver attached to the subsequent maintenance vehicle and the preceding maintenance vehicle from the light reception signal of the subsequent maintenance vehicle, and a braking signal or the like according to the calculated distance. And a controller for outputting. 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 two light emitters separated by a predetermined distance from the preceding maintenance vehicle varies depending on the distance from the subsequent maintenance vehicle. Therefore, it is possible to accurately calculate the separation distance between the two vehicles by detecting the angle. Moreover, it is visible light or heat ray projection / reception, and it can accurately measure a separation distance without causing interference in a tunnel unlike radio waves.
Moreover, the use frequency or the modulation frequency of the visible light or the heat ray of the maintenance vehicle traveling on the up line and the down line is made different. By making the use frequency or modulation frequency of visible light or heat rays different between the upstream line and the downstream line, there is no interference between the upper and lower lines, and no unnecessary braking or the like occurs. In addition, when the modulation frequency is used, there is an advantage that it is not affected by noise of visible light or heat rays.
[0024]
Further, in the invention described in claim 3 or 4 of the present invention, except that the light emitter is installed at the end of the work section of the track and the light receiver is installed in the maintenance vehicle. The configuration and the function and effect are the same as those of the invention of the first or second aspect . In the invention of claim 3 or 4 , it is possible to reliably prevent the maintenance vehicle from entering the work section.
[0025]
Then, according to the present invention according to claim 5, the controller, the distance between the preceding maintenance vehicles or work section collates the own speed and brake curves of maintenance vehicles, and outputs a braking signal ing. By collating the separation distance with the speed and brake curve of the maintenance vehicle, it is divided into no warning area, warning area, brake control area, etc. according to the separation distance and speed, and when entering the warning area A warning can be issued in advance and a warning is given to reduce the speed, and an emergency brake can be applied in the brake control area to reliably avoid a collision.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a collision preventing apparatus according to a first embodiment of the present invention.
FIG. 2 is a diagram illustrating a state in which a separation distance between a preceding maintenance vehicle and a subsequent maintenance vehicle according to the first embodiment of the present invention is measured.
FIG. 3 is a view for explaining the 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. (A) shows the case where the distance between the preceding maintenance vehicle and the subsequent maintenance vehicle is long as viewed from the subsequent maintenance vehicle. Drawing (B) is a drawing when the same separation distance is close.
FIG. 5 is a flowchart of the collision preventing apparatus according to the first embodiment of the present invention.
FIG. 6 is a diagram 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 maintenance vehicles for up line and down line.
FIG. 8 relates to a second embodiment of the present invention and is a drawing showing a relationship between a work section and a maintenance vehicle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Preceding maintenance vehicle, 2 ... Subsequent maintenance vehicle, 3A, 3B ... Light emitter, 4 ... Light receiver, 5 ... Controller, 6 ... Operation and display board, 7A, 7B ... Light emitter, 8 ... Light receiver , 9 ... Controller, 10 ... Operation / display panel

Claims (5)

Two visible light or heat ray emitters mounted at a predetermined distance on the rear end side of the preceding maintenance vehicle, the visible light or heat ray receiver attached to the subsequent maintenance vehicle, and the subsequent maintenance vehicle And a controller that outputs a braking signal and / or an alarm according to the calculated distance, the controller including two light emitters of the preceding maintenance vehicle. by but detecting the angle state, and are not for calculating a distance, with different frequencies used in the visible light or heat rays in the maintenance vehicle traveling a maintenance vehicle and a down line which runs up line A maintenance vehicle accident prevention device characterized by that . Two visible light or heat ray emitters mounted at a predetermined distance on the rear end side of the preceding maintenance vehicle, the visible light or heat ray receiver attached to the subsequent maintenance vehicle, and the subsequent maintenance vehicle And a controller that outputs a braking signal and / or an alarm according to the calculated distance, the controller including two light emitters of the preceding maintenance vehicle. By detecting the angle between the two, the separation distance is calculated, and the modulation frequency is modulated between the maintenance vehicle traveling on the up line and the maintenance vehicle traveling on the down line by modulating the visible light or heat rays to be used. An accident prevention device for maintenance vehicles characterized by different Two visible light or heat ray light emitters mounted at a predetermined distance on the end side of the work section, the visible light or heat ray light receiver installed in the maintenance vehicle, and a brake signal and / or alarm for the maintenance vehicle 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 the controller uses the calculated distance for maintenance. An accident prevention device for a maintenance vehicle, which outputs a braking signal and / or warning to a vehicle and has different operating frequencies of visible light or heat rays between an up line and a down line . Two visible light or heat ray light emitters mounted at a predetermined distance on the end side of the work section, the visible light or heat ray light receiver installed in the maintenance vehicle, and a brake signal and / or alarm for the maintenance vehicle 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 the controller uses the calculated distance for maintenance. An accident prevention device for a maintenance vehicle that outputs a braking signal and / or warning to a vehicle, modulates visible light or heat rays to be used, and varies the modulation frequency between an up line and a down line . 5. The controller according to claim 1, wherein the controller collates the separation distance to the preceding maintenance vehicle or track side work section with the speed and brake curve of its own maintenance vehicle and outputs a braking signal. An accident prevention device for maintenance vehicles.

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