JP2781731B2 - Light receiving level recording method for moving objects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infrared transmitter installed near an orbit through which a mobile unit passes, and a light receiver provided on the mobile unit receives an optical signal from the infrared transmitter to perform optical communication. The present invention relates to a light receiving level recording method for recording a light receiving level when a moving body moves in optical space transmission.

[0002]

2. Description of the Related Art An infrared light transmitter is installed near an orbit through which a moving object such as a vehicle passes, and an optical signal transmitted from the light receiving device is received by a light receiver provided on the moving object side to perform optical communication. In this method, when the light receiving level at each moving position on the moving body side is continuously recorded by a recorder using a recording paper, conventionally, the recorder is internally provided regardless of the moving speed of the moving body. The light receiving level of the optical signal transmitted from the fixed body side light transmitter at a constant paper feed speed according to the self-oscillation circuit is continuously recorded.

However, in such a conventional light receiving level recording means, the light receiving level of the optical signal transmitted from the fixed body side light transmitter at a constant paper feed speed irrespective of the moving speed of the moving body. Is continuously recorded, the distance traveled on the recording paper cannot be recognized.
Alternatively, there has been a problem that the light receiving level corresponding to each position cannot be confirmed.

[0004]

As described above, conventionally, an infrared light transmitter is installed near the orbit through which a moving object passes, and a light receiver provided on the moving object receives an optical signal of the light transmitter. In optical space transmission where optical communication is performed, when the light receiving level at each moving position on the moving body is continuously recorded by a recorder using a recording paper, conventionally, the moving speed of the moving body is Regardless, since the recorder continuously records the light receiving level at a constant paper feed speed according to the self-oscillation circuit inside the recorder, it is not possible to recognize the distance moved on the recording paper, and each distance or each position However, there is a problem that it is not possible to confirm the light receiving level corresponding to the above.

[0005] The present invention has been made in view of the above circumstances,
In a system in which a fixed body and a moving body mutually transmit optical space through a transmitter and a receiver that transmit and receive optical signals, the fixed body and the moving body are transmitted from the fixed body side transmitter at a paper feed speed corresponding to the moving speed of the moving body. By continuously recording the received light level of the received optical signal, the moving distance can be recognized on the recording paper, and the received light level corresponding to each distance or each position can be easily recognized on the recording paper. The purpose is to provide.

[0006]

SUMMARY OF THE INVENTION The present invention relates to an optical space transmission system for communicating between a fixed body and a mobile body by optical signals transmitted and received via a light transmitter / receiver comprising a light transmitter and a light receiver. When the moving body is traveling in the area covered by the optical signal transmitted from the fixed body side light transmitter and the light level of the light signal received by the moving body side light receiver is continuously recorded, the moving The light receiving level of the optical signal is continuously recorded at a paper feeding speed corresponding to the moving speed of the body.

That is, the present invention relates to a system in which a fixed body and a mobile body mutually perform optical space transmission by a transmitter and a receiver for transmitting and receiving an optical signal. When continuously recording the received light level of the transmitted optical signal, the speed signal of the wheels used to display the speed of the moving object is converted into a signal for controlling the paper feed speed, and is used to control the moving speed of the moving object. The light receiving level of the optical signal received from the fixed body side light transmitter at the corresponding paper feeding speed is continuously recorded.

[0008]

In the configuration of the present invention described above, the light receiving level of the optical signal transmitted from the fixed body side light transmitter at the paper feed speed corresponding to the moving speed of the moving body is continuously recorded on the recording paper. The distance moved can be recognized on the recording paper, and the confirmation of the light receiving level corresponding to each distance or each position can be easily recognized on the recording paper.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration explanatory view showing the overall configuration in one embodiment of the present invention, and FIG. 2 is a functional block diagram showing the configuration of the above embodiment.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a traveling trajectory of a vehicle serving as a moving body, 2 denotes an infrared light transmitter installed near the track 1, and 3 denotes an optical signal transmitted from the light transmitter 2 ( Infrared light)
It is.

Reference numeral 4 denotes a vehicle serving as a moving object, 5 denotes an infrared light receiving device which is attached to a fixed position of the moving object 4 and receives an infrared ray (infrared ray) 3 transmitted from the light transmitter 2; Is a log amplifier for converting an optical signal (infrared ray) 3 received by the light receiver 5 into a signal of a DC voltage level (a light receiving level signal).

7 is a wheel of the vehicle 4, 8 is a generator which is a vehicle device for outputting a distance signal according to the rotation speed of the wheel 7,
Reference numeral 9 denotes a distance signal output from the generator 8 (FIG. 3)
(See (a)) and distance pulse for recorder (see Fig. 3 (b))
Is a distance pulse interface that converts to

Reference numeral 10 denotes a paper feed speed in accordance with the distance pulse for the recorder output from the distance pulse interface 9, and a recorder for continuously recording the light receiving level value output from the log amplifier 6 as a voltage change amount on the recording paper.

FIG. 3 is a signal waveform diagram for explaining a means for generating a distance pulse for a recorder in the above embodiment, and FIG. 3A shows an output waveform of a distance signal obtained from a generator 8. FIG. 4B is a diagram showing an output waveform of a recorder distance pulse obtained from the distance pulse interface 9. Here, the generator 8 as a vehicle device outputs the number of revolutions of the wheel 7 as a sine wave distance signal corresponding to the frequency, and this distance signal is converted into a rectangular wave recorder distance pulse by the distance pulse interface 9. Output. In the figure, T1 is the time when the moving vehicle 4 is stopped.
Reference numeral 2 denotes a start time of the vehicle 4 serving as a moving body, and T3 denotes a time of acceleration of the vehicle 4 serving as a moving body.

The operation of the embodiment of the present invention will now be described with reference to the drawings. An optical signal (infrared ray) is output from the infrared transmitter 2 installed at a predetermined position near the orbit 1 in a predetermined area on the orbit 1.

The vehicle 4, which is a moving body, travels on the track 1 and enters the area covered by the optical signal (infrared ray) output from the light transmitter 2, and receives light received by the vehicle 4. The optical signal output from the light transmitter 2 (infrared ray)
Is received.

A part of the light signal (infrared ray) received by the light receiver 5 is branched for a recorder and input to a log amplifier 6. The log amplifier 6 converts an optical signal (infrared ray) input from the light receiver 5 into a DC voltage, and sends the optical signal level to the recorder 10 as a voltage change.

On the other hand, a rotation number signal of the wheels 7 when the vehicle 4 as a moving body travels in the area is input to the generator 8. The generator 8 controls the number of rotations of the wheels 7 as shown in FIG.
As shown in (a), the signal is converted into a sine wave distance signal corresponding to the frequency and transmitted to the distance pulse interface 9.

The distance pulse interface 9 converts the distance signal shown in FIG.
It is converted into the distance pulse for the recorder shown in FIG.
To send to.

The recorder 10 continuously records the light receiving level value output from the log amplifier 6 as a voltage change amount on the recording paper at a paper feeding speed according to the recording meter distance pulse input from the distance pulse interface 9.

As described above, the light receiving level of the optical signal received by the light receiver 5 of the vehicle 4 as a moving object corresponds to the moving speed of the moving object (vehicle 4), that is, the scale on the recording paper corresponds to the distance. At the set paper feed speed, a voltage change is continuously recorded.

As described above, the wheels 7 of the vehicle 4 serving as a moving body
By using the rotation speed signal for paper feed speed control, the light receiving level corresponding to the distance can be recorded irrespective of the moving speed of the moving body, and can be easily recognized on the recording paper.

[0023]

As described above in detail, according to the present invention, in a system in which a fixed body and a mobile body mutually perform optical space transmission by a transmitter and a receiver for transmitting and receiving an optical signal, A speed detecting means for detecting a moving speed; and a recording means for continuously recording a light receiving level of an optical signal received by a light receiver at a paper feeding speed according to the moving speed detected by the speed detecting means. When the moving body is moving within the area covered by the optical signal transmitted from the optical device, the light receiving level of the optical signal received by the light receiving device on the moving body side is in accordance with the moving speed detected by the speed detecting means. With the configuration in which the continuous recording is performed at the paper feed speed, the moving distance of the moving body can be recognized on the recording paper, and thus, the confirmation of the light receiving level corresponding to each distance or each position can be easily recognized on the recording paper.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory view showing an overall configuration in an embodiment of the present invention.

FIG. 2 is a functional block diagram showing the configuration of the embodiment.

FIG. 3 is a signal waveform diagram for explaining a means for generating a distance pulse for a recorder in the above embodiment ((a) is a diagram showing an output waveform of a distance signal obtained from a generator 8, (b)
FIG. 4 is a diagram showing an output waveform of a recorder distance pulse obtained from the distance pulse interface 9).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... orbit, 2 ... light transmitter (infrared light transmitter), 3 ... light signal (infrared ray), 4 ... moving body (vehicle), 5 ... light receiver (infrared light receiver), 6 ... log amplifier, 7 ... wheels, 8 ... generator, 9 ... distance pulse interface, 10 ... recorder.

Claims (1)

(57) [Claims] 1. A system in which a fixed body and a mobile body mutually perform optical space transmission by a light transmitter and a light receiver for transmitting and receiving an optical signal. Recording means for continuously recording the light receiving level of the light signal received by the light detector at a paper feed speed according to the moving speed detected by the speed detecting means, and an area covered by the light signal transmitted from the light transmitter on the fixed body side When the moving body is moving inside, the light receiving level of the optical signal received by the light receiving device on the moving body side is continuously recorded at a paper feeding speed according to the moving speed detected by the speed detecting means. Light receiving level recording method for moving objects.