JPH04368277A - Video camera system for rail traveling body - Google Patents

Abstract

PURPOSE:To obtain a good image in quality by improving the stability in the transmission route of a video signal, preventing a noise from shifting to the video signal in the transmission route and eliminating any adverse effect, therefore removing any possible image noise. CONSTITUTION:At a transmission system 3, a frontal scene of a model train 2 is photographed by a television camera 5, forming a video signal, and this video signal is frequency-modulated by a frequency-modulation circuit 6, and converted into a light signal by a light emitting diode 8, then it is outputted. At a receiving system 4, the light signal is converted into a frequency- modulation signal by a photodiode 10, and frequency-demodulated by a frequency-demodulation circuit 12, thus the video signal is securable.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a video camera system for a track running vehicle, and more particularly to a video camera system for a track running vehicle in which a small television camera is mounted on a model train and the obtained video signals are displayed on a monitor. .

0002

2. Description of the Related Art Conventionally, there is a system in which a small television camera is mounted on a model train as a track running body, and a video signal obtained by the television camera is displayed on a monitor. In conventional systems of this type, video signals are AM-modulated and emitted from an antenna provided on the body of a model train.

0003

[Problem to be solved by the invention] In the above-mentioned prior art,
Since the video signal was transmitted with AM modulation, there was a problem that the stability of the video signal transmission path was poor, and noise from the rails, motors, etc. could easily be added to the video signal emitted from the antenna. Ta.

As a result, there has been a problem in that it is difficult to remove image noise and it is difficult to obtain images of good quality.

[0005] Accordingly, an object of the present invention is to provide a video camera system for a track vehicle that is capable of obtaining images of good quality.

[0006]

[Means for Solving the Problems] The present invention includes means for mounting a television camera on a track vehicle running along a track, converting a video signal output from the television camera into an optical signal and transmitting the same; The configuration includes means for receiving an optical signal and demodulating it into a video signal.

[0007]

[Operation] A television camera mounted on the track vehicle captures an image of the surrounding scene, and a video signal is output from the television camera. The video signal from the television camera is converted to an optical signal and output to the receiving side. On the receiving side, the received optical signal is demodulated into a video signal.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the description of this embodiment, a 9 mm gauge model railway train is used as an example of the track running body.

FIG. 1 shows a conceptual schematic explanatory diagram of this video camera system for a track vehicle, and FIG. 2 shows a block diagram.

As shown in FIG. 1, this video camera system for track running bodies is used for
a and 2b, and a receiving system 4 that receives the optical signal output from the transmitting system 3 and converts it into a video signal.
It is mainly composed of. Note that 1 indicates a rail as a track. Further, a motive vehicle (not shown) is arranged at an appropriate position, and the model train 2 is driven by this motive vehicle.

The above-mentioned transmission system 3 includes a television camera 5, an FM
It mainly consists of a modulation circuit 6, an amplifier 7, a light emitting diode 8, etc. The television camera 5 is miniaturized so that it can be mounted on a 9 mm gauge vehicle body 2a. The television camera 5 is fixedly mounted on the vehicle body 2a, and other circuit blocks are mounted on the vehicle body 2b. This car body 2
b is configured so as not to be affected by external noise.

The receiving system 4 mainly includes a photodiode 10, an amplifier 11, an FM demodulation circuit 12, a video amplifier 13, and the like. A monitor 16 is connected to this receiving system 4.

Next, the operation will be explained with reference to FIGS. 1 and 2. While the model train 2 is running on the rails 1 or stopped on the rails 1, the scenery in front of the model train 2 is imaged by the television camera 5, and a video signal is formed. This video signal may be in any of the NTSC, PAL, and SECAM formats. This video signal is then supplied to the FM modulation circuit 6 via, for example, a coaxial cable so as not to be affected by external noise.

The FM modulation circuit 6 directly applies FM modulation to the video signal supplied from the television camera 5. The FM-modulated video signal is supplied to a light emitting diode 8 via an amplifier 7.

The light emitting diode 8 converts the FM-modulated video signal into an optical signal. The converted optical signal is
The signal is transmitted to a receiving system 4 as a fixed receiving station. still,
In this embodiment, the area between the light emitting diode 8 and the photodiode 10, through which optical signals are transmitted, is referred to as a transmission path.

In the photodiode 10 of the receiving system 4, the optical signal output from the light emitting diode 8 of the transmitting system 3 is converted into an FM signal.
converted into a modulated signal. This FM modulation signal is transmitted to the amplifier 11.
The signal is supplied to the FM demodulation circuit 12 via the FM demodulation circuit 12.

In the FM demodulation circuit 12, a video signal is demodulated from the FM modulation signal. This video signal is transmitted to the video amplifier 13.
It is taken out from the terminal 14 via. In the illustrated example, the video signal is supplied to the monitor 16 via the terminal 14. Then, on the monitor 16, the scenery in front of the model train 2 captured by the television camera 5 is displayed.

By viewing the scenery in front of the model train 2 displayed on the monitor 16, the user can have a simulated experience of viewing the scenery from inside the model train 2. Additionally, such a system can be used for remote sensing. Furthermore, it is also possible to obtain such an image as a hard copy using a printer.

According to this embodiment, in the transmission system 3, the scenery in front of the model train 2 is imaged by the television camera 5 to form a video signal, and the video signal is transmitted to the FM modulation circuit 6.
M modulated, converted into an optical signal by a light emitting diode 8 and outputted, and in the receiving system 4, the optical signal is sent to a photodiode 10.
Since the video signal is converted into an FM modulated signal by the FM demodulation circuit 12 and FM demodulated by the FM demodulation circuit 12, the stability of the video signal transmission path can be made good. It can prevent noise generated from motors etc. from getting onto the video signal, eliminating the negative effects of noise.
As a result, image noise can be removed and images of good quality can be obtained.In addition, the power supply system constraints (brush noise interference), which were previously limited by the weight of the vehicle, are eliminated, so the compact N, Z Applicable to vehicles of gauge size, etc.

Furthermore, since the video signal captured by the television camera 5 is directly FM-modulated, complex processes such as separating the video signal into a luminance signal and a color signal, or converting a color signal to a low frequency signal are not possible. No signal processing is required, and the circuit configurations of the transmitting system 3 and receiving system 4 can be made relatively simple.

In this embodiment, the rail 1 is described as a track, and the model train 2 is described as a track running body, but the present invention is not limited to this. As long as the same function is achieved, it can be applied even if the size, track, type of track vehicle, etc. changes. For example, it can be applied to a monorail as the track vehicle and a monorail track as the track.

[0022]

According to the video camera system for a track vehicle according to the present invention, in the transmission system, a television camera images the scenery in front of the track vehicle to form a video signal, and the video signal is converted into an optical signal. In the receiving system, the optical signal is converted into a video signal, which has the effect of improving the stability of the video signal transmission path. It has the effect of preventing the noise generated from the motor etc. from getting onto the video signal and eliminating the negative effects of the noise.As a result, it has the effect of removing image noise and obtaining images of good quality. .

[0023] Since it is possible to eliminate the power supply system constraints (brush noise interference) that were conventionally limited by the weight of the vehicle, the small N
This has the advantage that it can be applied to vehicles of sizes such as , Z gauge, etc.

Furthermore, according to the embodiment, since the video signal captured by the television camera is directly FM modulated, there is no need to perform complicated signal processing, and the circuit configurations of the transmitting system and receiving system are relatively simple. , it has the effect of making it simple.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

1 Rail 2 Model train 2a, 2b car body 5 TV camera 6 FM modulation circuit 8 Light emitting diode 10 Photodiode 12 FM demodulation circuit

Claims (1)

[Claims] 1. A means for mounting a television camera on a track vehicle traveling along a track, converting a video signal output from the television camera into an optical signal and transmitting the same; A video camera system for a track vehicle, comprising means for demodulating signals.