JPS586686A - Picture communication device - Google Patents

Abstract

PURPOSE:To perform driving extremely in safety by automatically switching and displaying pieces of picture information on front condition on a monitor TV screen above a driver's seat one after another according to the driving of a moving body. CONSTITUTION:Front conditions on a track shot by TV cameras arranged at distance are converted at a high frequency by a transmitter 3a into pictures, which are radiated from a front antenna 4a with an extremely fine radio wave. A moving body, on the other hand, receives the radiated radio wave through a receiving antenna 7 to reproduce the pictures on a receiver 11. Those received pictures are stored, frame by frame, in a picture storage device 12 in the order of the reception under the control of a controller 13. In another way, they are projected as static pictures on monitor TVs 9a, 9b, and 9c successively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on S S T, (5uper 5onia T
The present invention relates to an image communication device for monitoring conditions in front of a vehicle that cannot be visually seen from the driver's seat of a moving body that travels on a track at extremely high speeds, such as a vehicle such as a vehicle.

In the past, there was an example in which a TV camera would take pictures of the scene in front of the train during a train pass, transmit it via a leaky coaxial cable, and monitor the image on a TV installed in the driver's seat. However, this method has the drawback that it is only possible to view an image from one point at a time, and it cannot be used continuously while the moving object is in motion.

In the conventional example described above, even if multiple sets of similar devices are arranged, confusion will arise if the driver's seat does not know which camera each image was taken from. In addition, in the case of a moving object that travels on a different trajectory than an airplane or a car, it is not possible to change its course to escape from obstacles in front of it, and therefore the only option is to simply stop its operation. Therefore, it is necessary to organize images from a plurality of cameras sequentially arranged as the vehicle travels and provide them to the monitor television, instead of images taken at one location as in the past.

The present invention aims to solve each of the above-mentioned problems and provide a highly practical image communication device.

FIG. 1 is a diagram showing the configuration of an embodiment to which the invention is applied, in which 1 is a track, 2a, 2b and 2o are television cameras (only three are illustrated) provided along the track, 3a, 3b ,3
A converts the image taken by the camera into a high frequency signal and connects it to cables 5a and 5b.

Image transmitter sending to 6c, 4a, 4b, 4
Reference numeral a designates a transmitting antenna such as a Yagi antenna provided at the ends of the cables 5a, 5b, and So, respectively; 6, the frontmost portion of the vehicle including the driver's seat; 7, a receiving antenna; 8, a receiving device; and 9, a monitor television.

In the above embodiment, the distance between each other (for example, 2Kll+
) The state in front of the orbit captured by a poorly placed television camera (for example, 2a) is converted into a high frequency image signal by an image transmitter 3a, and is radiated by a weak radio wave or the like from an antenna 4a in front (for example, 2KII+).

- In the blade movable body, the radiated radio waves are received by the receiving antenna 7, and then the received radio waves are reproduced as an image by the receiving equipment 8, and the received image is stored and controlled in this manner as will be described later. Each time the body 6 passes close to the transmitting antennas 4a, b, and a, it can receive and image the state on the orbit far in front of each antenna.

FIG. 2 is a diagram showing a more detailed configuration of the receiving device and monitor television shown in FIG. The receiving equipment 8 is composed of a control device that controls writing, erasing, and sending. 9a, 9b, 9
All a are monitor TVs, and the case of three TVs is illustrated.

To explain the operation of the above configuration, radio waves received by the receiving antenna 7 are reproduced into images by the receiver 11, and the received images are stored frame by frame in the image storage device 12 in the order of reception. The images are then stored in units of 17 frames or sequentially sent to monitor televisions 9a, 9b, and 9a as still images. That is, first, the image of the television camera 2a (in FIG. 1) located closest to the moving object is displayed on the first monitor 9a, and then as the moving object advances, the image of 2b is displayed on the monitor 9a.
The three images on the monitor TV are transferred to the control device 1 one after another by sequential feeding, such that the image 2a is displayed on the monitor 9b instead.
In the above configuration example, the monitor TV 9a displays the closest orbital state, the monitor TV 9b displays the next closest image, and the monitor TV 9b displays the next closest image.
The situation at the i most distant point can be displayed on a.

As a specific numerical example, for example, if the traveling speed of a moving object is 5 per hour,
00-, the moving object travels approximately 180m per second,
- Japan's standard television system (NTSC system)
Since 30 frames of the screen are transmitted and received every second, if this method is used, the distance 80 that the moving body moves while transmitting one frame of image is □=6 m.

3゜' In order to completely receive one frame on a mobile object and store the image, it is necessary to receive several frames for synchronization, but in order to receive six frames, the transmitting antenna It is sufficient to secure a reception area of up to 30 meters in front and behind the station, and this is sufficiently reachable even using weak radio waves.

If another method does not use a frame memory, it would be necessary to create transmission electric fields for several channels over the entire orbit, which would require extremely high costs.

- The Wanfu method is easy to implement.

In addition, this embodiment has the advantage that it is not necessary to newly allocate radio waves from among valuable radio waves because it is possible to use weak radio waves.

Furthermore, even if one or two of the image transmitters installed along the track shown in the above example malfunctions and cannot transmit data, the monitor screen in the driver's seat must not be forwarded sequentially. Therefore, a system may be constructed in which a digital or tone identification signal is given to each image transmitter, and this signal is received within the moving body to perform control so that the monitor images are accurately sequentially advanced.

Furthermore, the television cameras 2a, 2b, 2a, etc. have an exposure adjustment function automatically as necessary, or are not limited to ordinary television cameras; they use photomultiplier tubes to improve sensitivity, or they can be used to improve the sensitivity of ordinary light such as fog. Infrared imaging tubes may be used in areas where visibility is often poor.

In order to save power and extend the lifespan of the television camera, a proximity sensor (for example, a ceramic microphone used for automobile traffic control), etc. is installed near the antennas 48e, 4b, and 4a, so that the antennas 48e, 4b, and 4a can be installed near the train. The TV camera and the transmitter/receiver are turned on for a certain period of time or after approaching, or the power of the next TV camera (2b, 3b) is turned on as soon as the first receiving antenna 4a starts receiving. This information may be transmitted to the next television camera device by wire at the same time as the previous television camera device starts receiving the image, and the power of the next television camera device is turned on.

In addition, the image transmission means between the television camera and the moving object is not limited to ordinary radio waves via an antenna, but leakage coaxial cables or induction may also be used. A coaxial cable may also be used. Furthermore, the received images can be sent to the operation control center for use.

According to the present invention, as is clear from the above embodiments.

The image information of the forward situation, which is essential for the operation of a mobile object on an ultra-high-speed orbit, is automatically switched to the monitor TV screen above the driver's seat one after another as the mobile object is operated, and the mobile object can be advanced while monitoring this information. Therefore, it is extremely effective in terms of safety.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an image communication device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a detailed configuration of a portion thereof. 1... Orbit, 2... TV camera, 3
...Image transmitter, 4...Transmission antenna, 6
...Moving object, 11...Receiver, 12...
. . . Image storage device, 13 . . . Control unit, 14
......Sending section, 9-...Monitor TV. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (1)

[Claims] a plurality of television cameras arranged along a trajectory along which a moving body travels, and image signals from the television cameras are arranged on the side of the moving body and in the same order as the television cameras; a transmitting means for transmitting the image signal toward the moving object; a receiver provided in the moving object; and an image storage device for storing a plurality of images from the receiver for each frame in the order of arrival. , comprising means for transmitting the stored images, a monitor television for sequentially switching and displaying the images in the order of arrival, and a control unit for controlling storage and transmission of the images, and a control unit for controlling the state of the trajectory in front of the moving object on the monitor. An image communication device characterized by sequentially displaying changing clothes on a television.