JPH0489514A - Image pickup apparatus for railway train - Google Patents

Abstract

PURPOSE:To pick up an image of the back of a train by detecting the running direction and passage of the train by two car body side detecting means and by making an ITV camera operate by a detection signal of the passage of the train. CONSTITUTION:When a train 10 runs in the running direction 11 and the head car comes in, the car is detected by a car body side detecting element 121 and a detection signal 131 turns ON. Then, it is detected by a car body side detecting elements 120 and a detection signal 130 turns ON. When the tail of the train 10 passes, the detection signal 131 of the car body side detecting element 121 turns OFF and then the detection signal 130 of the car body side detecting element 120 turns OFF. A back detecting element 14 turns a back detection signal 15 from OFF to ON. In the moment when the back detection signal 15 changes from OFF to ON, an ITV camera 16 picks up an image of the back of the train and outputs a video signal 17. Thereby the image of the back of the train can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a train backside imaging device that detects and images the backside of a running train.

[Prior Art] Fig. 3 shows a conventional train imaging device, and its purpose is to take an image of characters displayed on the front of a train.

In the figure, (16) is the ITV camera, (17) is the video signal, (30) is the train, (31) is the train running direction,
(32) detects the side of the train's car body or the roof of the car body, and outputs a presence signal while the side of the car body or the roof of the car body is in front. At the joint part, there is a body side detection part that outputs an absence signal, (3
3) is a detection signal output by the vehicle side surface detection section; if the detection signal is on, it indicates a presence signal; if the detection signal is off, it indicates an absence signal.

Next, the operation will be explained.

While the train (30) is not in front of the car body side detection unit (32), the car body side detection unit (32) turns off and outputs the detection signal (33) to the ITV camera (16). does not output the video signal (17).

When the train (30) travels in the traveling direction (31) and the side surface of the train (30) reaches the front of the side surface detection section (32), the detection signal (33) changes from OFF to ON.

The ITV camera (16) images the front of the vehicle body of the leading vehicle at the moment the detection signal (33) changes from OFF to ON and outputs a video signal (17).

[Problems to be Solved by the Invention] The conventional device is configured as described above to capture an image of characters displayed on the front of a train.

There was a problem in that even if an attempt was made to image the characters displayed on the backs of trains, the backs of nine trains could not be imaged.

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to obtain a train imaging device that can image the back of the last vehicle of a train.

[Means for Solving the Problems] The train imaging device according to the present invention detects the side of the car body or the roof of the car body of Train 9, outputs a presence signal while the side of the car body or the roof of the car body is in front, and detects the side of the car body or the roof of the car body of Train 9. The problem is that there is one car body side detection means that outputs an absence signal at the joint between two car bodies, and a car body joint that is located parallel to the train running direction with respect to the car body side detection means. One car body side detection means, which is equivalent to the car body side detection means described above, is installed at a position longer than the width of the car and shorter than the car body length of one car, and the detection signals of the two car body side detection means are used to detect the back of the train. Detected 9
The present invention is characterized by comprising a rear surface detection means for outputting a train rear surface detection signal, and an ITV camera that takes an image of the train rear surface using the train rear surface detection signal of the train rear surface detection means as a trigger and outputs a video signal.

[Operation] In this invention, the running direction and passing of a train are detected by two vehicle body side surface detection means, and the ITV camera is operated in response to a passing detection signal of one train to image the rear side of the train.

[Example] Figure 1 shows an example of this invention.
) is the train, (H) is the running direction of the train, (120) and (121) detect the side of the train's car body or the roof of the car body, and output a presence signal while the side of the car body or the roof of the car body is in front. If you are wondering if there is a train ahead, there is a detection unit on the side of the car body that outputs an absence signal at the joint between the two car bodies.
130) and (131) are vehicle body side detection parts (120)
and (121) are the output detection signals, and if the detection signal is on, it represents a presence signal.

If the detection signal is off, it represents an absent signal.

(14) is the two body side detection parts (120) and (1
21) detects the detection signals (130) and (131)
(15) is a train back detection signal output from the back side detection unit (14), (16)
) is an ITV camera, and (17) is a video signal.

FIG. 2 is a diagram showing the operation of the back surface detection section (14).
In the figure, (21) is the train approach detection circuit, (22)
is a waiting circuit for trains.

Next, the operation will be explained.

The train (10) detects the car body side detection parts (120) and
1), the detection signals (130) and (13
1) is turned off, and the backside detection unit (14) is waiting for a train to enter the train in the train approach detection circuit (21).

At this time, the train backside detection signal (15) is off, and the ITV camera (16) does not output the video signal (17).

When the train (lO) is traveling in the running direction (11) and the lead car of train (10) (not shown) approaches, the train (10) is first detected by the car body side detection unit (121). The signal (131) turns on and is detected by the vehicle body side detection section (120) 9th, and the detection signal (130)
turns on.

At this time, the train entry detection circuit (2
1) The detection signal (131) changes from off to on.

Next, it detects that the detection signal (130) changes from OFF to ON, and notifies the passage waiting circuit (22) that the train has entered.

While the train (lO) is passing, the detection signal (130) or (131) repeats OFF and ON every time the joint between the vehicles comes in front of the vehicle body side detection unit (120) or (121).

Since the installation interval between the vehicle body side detection parts (120) and (121) is wider than the width of the joint between the vehicles, the detection signal (130)
) and (131) are never turned off at the same time.

The passage waiting circuit (22) of the back surface detection unit (14) determines that the object is passing if one of the detection signals (130) and (131) is on.

When the tail end of the train (10) passes, the detection signal (131) of the car body side detection section (121) is first turned off.

Then, while the detection signal (131) is off, the detection signal (130) of the vehicle body side detection section (120) is turned off.

At this time, the passage waiting circuit (22) of the back surface detection section (14) changes the back surface detection signal (15) from OFF to ON.

The ITV camera (16) images the rear of the train at the moment the rear detection signal (15) changes from OFF to ON, and outputs a video signal (
17) is output.

[Effects of the Invention] As described above, according to the present invention, the two car body side detection means are used to detect the running direction and the tail end of the train, and the ITV camera is operated by the passing signals of nine trains. This has the effect of allowing images of the back of the 9 trains to be obtained.

[Brief explanation of the drawing]

1 and 2 are block diagrams of a train imaging device showing an embodiment of the present invention, and FIG. 3 is a diagram showing a conventional train imaging device. In the figure, (10) is the train, (11) is the running direction,
(120), (121) are vehicle body side detection parts, (13
0), (1:3L) is the detection signal, (14) is the backside detection section, (15) is the train backside detection signal, (16) is the I
TV camera, (17) is video signal, (21) is train approach detection circuit, (22) is train passing waiting circuit. (30) is the train, (31) is the running direction, (32) is the car body side detection circuit, and (33) is the detection signal. In addition, in FIG. 1, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] one car body side detection means that detects the side of the car body or the roof of the train, outputs a presence signal while the side of the car body or the roof of the car body is in front, and outputs an absence signal otherwise;
One car body side surface equivalent to the car body side surface detection means installed parallel to the train running direction at a position longer than the width of the car body joint part and shorter than the car body length of one car. a detecting means, a back side detecting means for detecting the rear side of the train based on the detection signals of the two vehicle body side detecting means and outputting a train back side detection signal; and a back side detecting means for outputting a train back side detection signal; A train imaging device characterized by comprising an ITV camera that takes an image and outputs a video signal.