JPS6024467A - Apparatus for detecting position of moving body - Google Patents

Abstract

PURPOSE:To enable the positional detection of a moving body, by simple constitution wherein the front part/rear part signals of the moving body are alternately transmitted at same radio wave frequency, and receiving the same by a wave guide cable corresponding to each wire present block section of the moving body. CONSTITUTION:Signals of the front part and the rear part of a moving body 101 generated by signal generators 1, 2 are applied to a radio wave transmitter 3 while alternately changed over by a change-over device 7 and a single radio wave f1 is outputted from the transmitter 3 to be supplied to a front part and a rear part antennae 5, 6 through a change-over device 8 operated in synchronous relation to the change- over device 7. This radio wave signal is supplied to a radio wave receiver 31 through a wave guide cable 13 of a section where the moving body 101 is present. The demodulated signal of the receiver 31 supplied to a logical circuit 51 which in turn detects the signals of the front part and the rear part of the moving body 101 of the block section corresponding to the cable 13 to store the front part signal as the positional information of the moving body. When the moving body 101 enters the section of a wave guide cable 14, the circuit 51 erases positional information and stores positional information of the cable 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mobile body position detecting device using a continuous check-in/check-out method using radio waves, which is used to control a mobile body such as a train.

A conventional device of this type is shown in FIG. In the figure, 101 is a moving body such as a train, 1 is a front signal generator that generates a signal indicating the front part of the moving body (hereinafter referred to as a front signal), and 2 is a signal indicating the rear part of the moving body (hereinafter referred to as the front signal). 3 is a front radio transmitter that sends out the input front signal using radio waves f1; 4 is a rear radio transmitter that sends the input rear signal using radio waves f2. 5 is an antenna installed at the front of the mobile object 101, 6
is the antenna installed at the rear of the mobile object 101, 12.1
3' and 14 are mobile bodies 10 corresponding to each blockage section, respectively.
Waveguide cable installed in sections in the moving direction of 1, 21, 3
1.41 corresponds to the waveguide cable 12゜13.14, and is a wireless receiver for fl that receives radio waves fl from the mobile object 101; 22,32゜42 corresponds to the waveguide cable 12, 13.1
4, a radio receiver for 12 receives the radio wave f2 from the mobile body 101, and 50 is a logic circuit that identifies the closed section where the mobile body 101 is located based on the front signal and rear signal of the mobile body 101. be.

Next, the operation will be explained.

The front signal generator 1 of the moving object 101 constantly generates a front signal indicating the front of the moving object 1°I, and the front signal is converted into a radio wave f1 by the front wireless transmitter 3. aerial line 5
The signal is input to the f11 radio receiver 31 via the waveguide cable connected to the radio wave f1, and the radio receiver 31 demodulates the front signal from the received radio wave f1. and logic circuit 5o
detects this front signal and moves the moving body 101 to the waveguide, -
It is detected that it is in a closed section corresponding to pull 13, and this is stored. Further, the rear signal generator 2 of the mobile object 101 constantly generates a rear signal indicating the rear of the mobile object, and the rear signal is converted into a radio wave f2 by the rear radio transmitter 4 and coupled to the antenna 6. The signal is input to the f22 radio receiver 32 via the waveguide cable 13, and the radio receiver 32 demodulates the rear signal from the received radio wave f2. Logic circuit 50 then identifies that this rear signal was received over waveguide cable 13.

Here, the logic circuit 5o detects the position of the moving body 101 by receiving the front signal of the moving body 101, and as shown in (a), the moving body 101 moves and the front antenna 5 corresponds to the adjacent section. When the section of the waveguide cable 14 is entered and the rear antenna 6 is in a position where it remains in the section of the waveguide cable 13, the logic circuit 5o will realize that the front signal from the waveguide cable 13 disappears and the adjacent waveguide cable 14 When the moving object 101 is located in the closed section corresponding to the waveguide cable 13 by detecting that the front signal is received and only the rear signal remains in the waveguide cable 13, the stored moving object 101 is detected. Delete location information. On the other hand, the logic circuit 50
Based on the front signal of the moving body 101 received from the section No. 4, position information of the moving body 101 in the closed section corresponding to the waveguide cable 14 is stored in the same manner as described above.

In this way, the logic circuit 50 detects the closed section in which the moving object 101 exists according to the movement of the moving object 101,
This can be memorized.

Further, the position information of the moving object 101 stored in the logic circuit 50 is based on the condition that the front signal of the moving object 101 is transferred to the front adjacent waveguide cable, and the condition that the moving object 101 is in the waveguide cable section.
Since the information is erased only under the condition that the rear signal of the moving object 101 is input, if the front signal or the rear signal of the moving object 101 or both are not received, the stored moving object position information will remain without being erased. Even if the transmitter of a moving body such as a train fails, the position can be detected in a fail-safe manner.

As described above, since the conventional device continuously transmits the front signal and the rear signal from the mobile object 101, different radio frequencies f1 and f2 are used to transmit each signal.
2 waves were required, making it difficult to receive allocation of radio waves for use.

This invention has been made in view of the above points, and involves alternately transmitting a front signal and a rear signal of a moving object from the front or rear antenna of the moving object using the same radio frequency. An object of the present invention is to provide a mobile body position detecting device capable of detecting the position of a mobile body using a single radio frequency wave by identifying the blocked section in which the mobile body is located by receiving signals using a waveguide cable corresponding to the blocked section. It is said that

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, 101 is a moving object, 1 is a front signal generator that generates a front signal, 2 is a rear signal generator that generates a rear signal, and 3 is a device that transmits the front signal and the rear signal as radio waves. A wireless transmitter 5 is installed at the front of the mobile object 101 and is used for transmitting front signals; 6 is an antenna for the mobile object 101;
An antenna installed at the rear of the vehicle to transmit rear signals,
7 and 8 are first ports for switching the input and output of the wireless transmitter 3, respectively. With the second alternating switch, each is synchronized with the other so that when the first alternating switch 7 is switched to the front signal generator I, the second alternating switch 8 is switched to the front antenna 5. The switching is performed alternately. 12,
13.14 is a waveguide cable that is divided and laid in the moving direction of the moving body 101 corresponding to each closed section, 21, 31.41
corresponds to the waveguide cable 12.13.14, and the moving body 10
A terrestrial radio receiver 51 receives and demodulates front signals and rear signals transmitted by radio waves f1 from the antennas 5 and 6 of 1; This is a logic circuit (section identification means) for identifying.

Next, the operation will be explained.

The front signal generator 1 of the moving body 101 generates a front signal indicating the front of the moving body 101, and the rear signal generator 2 generates a rear signal indicating the rear of the moving body 101. The alternating switch 7 alternately switches these outputs and inputs them to the radio transmitter 3. The radio transmitter 3 outputs these signals as radio waves [1], and this output is input to the front antenna 5 or the rear antenna 6 by a second alternating switch 8. This second alternating switch 8 is synchronized with the switching operation of the first alternating switch 7, and the first alternating switch 7 inputs the front signal of the front signal generator 1 to the radio transmitter 3. The second alternating switch 8 switches the output of the radio transmitter 3 to the front antenna 5, and the first alternating switch 7 switches the rear signal of the rear signal generator 2 to the radio transmitter 3. When switching to the input, the second alternating switch 8 switches the output of the radio transmitter 3 to feed the rear aerial 6.

Therefore, the radio frequency f1 is transmitted from the front antenna 5 of the moving body 101.
The front signal converted to
The rear signal converted to is output intermittently.

These radio signals are input to the radio receiver 31 via the waveguide cable 13 in the section where the mobile object 101 exists, and the radio receiver 31 modulates the radio signals to the logic circuit 51.
The front signal and rear signal are output alternately. - The logic circuit 51 uses these inputs to control the waveguide cable 13.
A front signal and a rear signal of the moving object 101 in the closed section corresponding to the block section are detected, and the front signal is stored as position information of the moving object 101. This stored information is retained even when the front signal to logic circuit 51 is disconnected.

When the mobile body 101 moves and the front antenna 5 enters the section of the waveguide cable 14 corresponding to the adjacent section, and the rear antenna 6 reaches a position where it remains in the section of the waveguide cable 13, the front antenna from the waveguide cable 13 The signal disappears and only the rear signal remains,
The front signal of the moving body 101 is input to the logic circuit 51 from the waveguide cable 14 adjacent to the front of the section of the waveguide cable 13. Under this condition, the logic circuit 51 connects the waveguide cable 1
The location information of the moving body 101 in the blocked section corresponding to No. 3 is deleted, and the device information of the moving body 101 in the blocked section corresponding to the front adjacent waveguide cable 14 of the section is stored and retained.

In this manner, the logic circuit 51 can extract the closed section in which the moving object 101 exists in accordance with the movement of the moving object 101 and store it.

Further, the position information of the moving object 101 stored in the logic circuit 51 is based on the condition that the front signal of the moving object 101 is transferred to the front adjacent waveguide cable and the condition that the rear signal of the moving object 101 is input to the waveguide cable section. Since it is erased only depending on the conditions, if the front signal or the rear signal of the moving object 101, or both are not received by the logic circuit 51, the stored moving object position information will not be erased and will remain. Even if the transmitter of a mobile object such as a mobile device malfunctions, the position of the mobile object can be detected in a fail-safe manner.

Note that in the above embodiment, radio frequencies were used to transmit front and rear signals of the mobile object, but in cases where there is little ambient noise, guidance radio frequencies that do not require a radio license may be used. In this case as well, the same effects as in the above embodiment can be achieved.

As described above, according to the present invention, the front part of the moving body, 1&
The block signal is transmitted alternately from the front and rear antennas at the same radio frequency, and this signal is received by a waveguide cable corresponding to each block section to identify the block section where the mobile object is located. Therefore, train movement detection using the continuous check-in/check-out method can be performed fail-safely using only one radio frequency wave, making it easy to obtain a radio license, and requiring only a radio transmitter and radio receiver. This has the effect of simplifying the configuration and making the device inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a mobile object position detection device using a conventional continuous check-in/checkout method using radio waves, and FIG. 2 is a configuration diagram of a mobile object position detection device according to an embodiment of the present invention. . 101... Mobile object, 1... Front signal generator, 2...
・Rear signal generator, 3... Radio transmitter, 5.6...
Antenna, 7... First alternating switch, 8... Second alternating switch, 12.13.14... Waveguide cable, 21
．． 31° 41... (terrestrial) radio receiver, 51... logic circuit (section identification means). In the drawings, the same reference numerals indicate the same or equivalent parts. Agent Oiwa Masuo Koma Figure 1 Figure 2

Claims (1)

[Scope of Claims] (14) In a mobile body position detection device that detects the position of a mobile body moving on a trajectory divided into a plurality of closed sections, a signal indicating the front part and a signal indicating the rear part thereof are transmitted by the same radio. A moving body that transmits signals alternately from the front and rear antennas in frequency, a waveguide cable that is divided and laid in the direction of movement of the moving body corresponding to each blocked section, and each of the waveguide cables. a terrestrial radio receiver provided to receive radio input from the cable; and section identification means for identifying a blocked section in which the moving body is located based on the front and rear signals outputted from the terrestrial radio receiver. A mobile object position detection device characterized in that the mobile object detects the position of the orbital object using one radio frequency wave. , a rear signal generator, a first alternating switch that alternately switches and outputs both signals, and a radio transmitter that transmits the output of the first alternating switch at the same radio frequency;
antennas provided in the front and rear parts; and a second alternating switch which operates in synchronization with the first alternating switch and alternately supplies the output of the radio transmitter to the front or rear antennas. A mobile body position detection device according to claim 1, characterized in that the device has the following.