JPS6119186B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an information signal transmission device between a mobile object moving on a fixed travel path and ground fixed equipment (hereinafter referred to as a ground station), and particularly relates to a device for transmitting information signals between a mobile object moving on a fixed travel path and a fixed ground facility (hereinafter referred to as a ground station). Although it is possible to transmit information signals from one side to the other at any point on the road between the two bodies,
At the same time, the feature is that the ground station can detect failures in the ground station equipment and detect when moving objects enter or exit the section.

Conventional transmission devices for the above purpose include two types: a fixed point type (also called an intermittent control type) that transmits information signals only at specific points, and a continuous type that can transmit information signals at any point on the road. Either one is used. These two systems commonly use electromagnetic induction, but in the fixed point type, for example, the information sending side has a resonance system that resonates sharply at a preset frequency for the information content. On the information detection side, a loop coil and an amplifier are respectively provided to connect the resonant circuit. When the resonant circuit is connected to the loop coil, the loop circuit constitutes a feedback oscillation circuit, and μβ>1 is well known as a necessary condition for oscillation in an oscillation circuit.
(However, μ is the amplification degree of the oscillation circuit when there is no feedback, and β is the feedback rate of the feedback circuit.) The resonant frequency of the resonant circuit, that is, the frequency corresponding to the type of information, satisfies the conditions of feedback phase angle = 0. oscillation occurs. On the information detection side, there is a system that detects the oscillation frequency using a separately provided oscillation frequency selection detection circuit and receives information. In addition, in the continuous type, a parallel two-wire guide wire extended along the track or running path is used for the transmission path, and the information sending side modulates a carrier wave in the low frequency or guided radio frequency band with audio frequency (tone) signals and pulses. Alternatively, the information is transmitted by a transmitter that encodes the information and generates an output modulated by linear modulation format or subcarrier modulation format, and the information receiving side receives and detects the information from the transmission path. Some devices are equipped with a receiver to transmit information.

However, in the fixed point system, when the distance between information transmission positions is large and the frequency of passing moving objects is small, it is economical to install equipment on the road, but conversely, when there are many moving objects and the distance between them is small, Ground equipment costs increase rapidly. Furthermore, when automatically controlling a large number of moving objects, it is necessary to exchange information at a large number of fixed points, which further increases the cost of ground equipment for this system. On the other hand, even in the continuous type, the transmitting and receiving equipment including the transmission line is expensive, so when there are many moving objects and the distance between moving objects is small, the number of transmitters and receivers required for ground equipment increases, making the cost of ground equipment extremely expensive. There is a problem with becoming. Furthermore, in vehicles using rubber tires, which have been put into practical use in recent years, the track cannot be used as a transmission line, and with automatic travel control that reduces the distance between moving objects, the amount of information between the ground station and each moving object has increased significantly compared to conventional methods. Therefore, both the conventional fixed point type and continuous type are becoming unfavorable in terms of function and economy.

The present invention is suitable for continuous transmission and reception of information even when a plurality of moving objects using wheels with rubber tires are running or when the distance between moving objects is small, and in particular, the information sending device is simplified. Being there,
Furthermore, since it also detects faults in ground station equipment and detects moving objects entering and exiting sections, it has the advantage of being highly efficient in terms of equipment costs. The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a diagram showing the principle of construction of an inductive wire and a coupling loop coil used in the present invention. 1, 1', and 2 in the figure are parallel three-wire guide wires, and 3 and 4 are the first and second guide wires, respectively.
(For coupling) transformer, 5 is the terminating resistor of the induction wire,
6 and 7 are coupling loop coils, and CS is an inductive coupling section. As shown in FIG. 1a, the guide lines 1, 1', and 2 are spread out on the same plane at regular intervals of, for example, 30 cm. Furthermore, the coupling transformer (T ₁ ) 3 connects one end of the induction wire 2 and the midpoint of the primary side of the transformer (T ₂ ) 4, and the coupling transformer (T ₂ ) 4 connects the induction wires 1 and 1'. A terminating resistor 5 is connected to the other end of each lead wire. The coupling loop coil 6 shown in FIG. 1b is an example of a crossed type, and in this case, the coil 6 is coupled to the induction wire shown by the broken line and generates an induced voltage by the current in the direction of the solid arrow in FIG. In other words, it is coupled with the inductive wire), but is canceled out by the current in the direction of the dashed arrow, and the induced voltage is zero, that is, there is no coupling with the inductive wire. Further, the coupling loop coil 7 has a characteristic that, contrary to the loop coil 6, it is coupled to the current in the direction of the broken line arrow, but is not coupled to the current in the direction of the solid line arrow. Therefore, as can be easily understood from FIG. 1, the input of the coupling transformer 3 generates an output 〓 to the coupling loop 6, and the signal is transmitted by inductive coupling, and the input of the coupling transformer 4 is connected to the coupling loop 6. A signal is transmitted by generating an output 〓 in the loop 7.

In addition, the phases of the currents due to both inputs are as shown by the solid line arrow and the broken line arrow in Figure A, respectively, and the coupled loop coils 6 and 7 have the same size and shape, one intersecting and the other non-intersecting, so there is no coupling. The coupling loss between −〓 and −〓 varies depending on the section length CS of the guide wire, signal frequency, etc., but is approximately 60 dB.
is obtained. In this description, loop coils are used as the coupling coils 6 and 7, but these may also be magnetic core (bar) coils, and the coils 6 and 7 may be placed one on top of the other. In addition, in order to further strengthen the coupling suppression between -〓 and -〓, a balancing variable resistor is connected between the connecting portions of the coupling transformers 3 and 4 and the terminals, or between the terminating resistor 5, or between each lead wire. Known safety measures such as connecting a balancing capacitor shall be taken. In this way, the guide line
Coupled coil 6 with CS section as parallel 3-wire induction line
and 7 can be configured.

FIG. 2 is a diagram showing an example of the configuration of the apparatus of the present invention. In the figure, the sections above the two-dot chain line indicate the information signal receiving side, and the sections below the transmitting side, and 1, 1', 2, 3, 4, 6, and 7 are the same parts as in FIG. 8 is a bandpass filter (BPF), 9 is a phase shifter (PS), 10,
20 is an amplifier (A), 11 is a signal detector, 12, 13
are third and fourth coupling transformers, 14 is an information signal transmitter, 15 is a combining (or coupling) transformer, 16 is a wave detector, and 17 is a high-Q resonance such as an electromechanical resonator. 18 is a phase shifter, 19 is a signal switch circuit, 21 is a detector for information signals and interference signals, 22 is a mobile object absence signal detector, 23 is a bandpass filter (BPF), and 24 is a phase shifter. (PS). 111 in circuit 11
(111-01, 111-02, 111-1~1
11-n) is BPF, 112 (112-01, 112-02,
112-1 to 112-n) are amplifiers, 113 (1
13-01, 113-02, 113-1~113
-n) is a detector, and 141 in the circuit 14
(141-1 to 141-n) are information signal changeover switches (SW), 142 (142-01, 142-
02, 142-1 to 142-n) are high Q resonators or resonant circuits similar to 17, 143 (143-0
1,143-02, 143-1 to 143-n) are phase shifters (PS), and 144 is an amplifier. Furthermore, 211 in the circuit 21 (211-01, 211-
02, 211-1 to 211-n) and 221 in the circuit 22 is a BPF, similarly 212 and 222 are amplifiers,
213 and 223 are detectors.

Next, the operation of each part will be explained with reference to FIG. First, we will explain the information signal transmission state during normal operation.
In the example shown in the figure, the output of the amplifier (A) 144 in the information signal transmitter 14 of the ground station equipment below the two-dot chain line is connected to parallel three-wire induction wires 1, 1', and 2 via coupling transformers 15 and 3. A signal current is passed through one end of the induction wire, and the other end of the induction wire is terminated with coupling transformers 12 and 13 as shown. On the other hand, a signal current flowing in two parallel wires constituted by the guide wires 1 and 1' is inputted from the transformer 4 to the information signal transmitter 14. In the signal transmitter 14, one of the selection switches 141 corresponding to a predetermined frequency for the information Di to be transmitted to the mobile object is closed. Now switch 1
If 41-1 is closed, resonator 142-1
, only the input component matching the resonance frequency f ₁ is extracted and output to the next stage phase shifter PS143-1. The phase shifter will be explained later.
The f ₁ wave is sent from this PS to amplifier 144 . Now, if the coupling loss from transformer 3 to transformer 4 via the induction wire is M ₀ (M ₀ is about 60 dB as mentioned above), then 14-15-3 - M ₀ -4-14. The loop circuit configured as _shown in _FIG . It is possible to set it to , and in this state this loop circuit will not oscillate.

On the other hand, the output of the transformer 4 is input to the information signal transmitter 14 and also to the resonator 17. This resonator 17 is assigned a resonance frequency f _o+1 different from the frequency assigned to the information signal transmitter 14, and extracts the f _o+1 wave from the input and sends it to the switch circuit 19 via the phase shifter PS18. . The switch 19 is turned off by the output of the detector D16, but the input from the transformer 144 to the detector 16 is not provided unless feedback oscillation of the amplifier 144 by the loop circuit is established. (This oscillation occurs when the induction wire is coupled with the loop coil of the moving body, or when there is a failure in the induction wires 1, 1' and the transformer 4 or transformer 13 connected thereto, as described later.) At this time, switch 19 is held on and f _o+1
The wave is amplified by the second amplifier 20 and then sent to the coupling transformer 3 via the coupling transformer 15 . The signal current from this transformer 3 is transmitted through the parallel three-wire induction wire 1,
BPF from the coupling transformer 12 at the other end through 1' and 2.
23. The BPF 23 extracts and passes the f _o+1 wave and sends it to the coupling transformer 13 via the next stage phase shifter PS24. Therefore, the BPF 23 and PS 24 can be called an f _o+1 wave termination adjustment circuit. Now, if we represent the guiding line by 1, 1', 2 as Z, and the guiding line by 1, 1' as Y, then for wave f _o+1 , 20-15-3-Z-12-23-24
A loop circuit of -13-Y-4-17-18-19-20 is constructed. and phase shifter PS18
In this case, when a fault such as a disconnection occurs in the induction wire 1 or 1' and the winding of the transformer 4 or 13 connected thereto, the coupling loss between the transformers 3 and 4 is reduced and 20-15-3- 4-17-18-19-2
In order to avoid that the amplification degree μ ₂ and feedback factor β ₂ of the loop circuit configured with 0 become μ ₂ β ₂ 1 and oscillate, the loop circuit is set so that the feedback phase≠0, for example, =π/2. On the other hand, in the phase shifter PS24, the above 20-15-3-Z-12-23-24-Y
In a 20-20 loop circuit (referred to as an absent loop circuit) such as -4-17-18-20, the phase is shifted together with PS18 so that the feedback phase=0 is established. And for this loop circuit, μ
It is possible to establish β1,=0, and in this case, the f _o+1 wave is oscillated. In this way, the guide wire is not coupled to the information signal receiving device on the mobile side, but when the ground equipment is operating normally, the f _{o +1} wave is always oscillated, and a part of its output is transmitted to the mobile body. The signal is input to the signal detector 22 to output an absence detection output _D41 .
The above is the operation of detecting the absence of a mobile object during normal operation.

Next, the transmission and reception of information signals during normal operation will be explained. When a moving object enters the CS section and its loop coil and induction wire are coupled, the following loop circuit is constructed and oscillates. First, if the switch 141-1 is closed based on the original information Di, then
The resonator 142-1 extracts only the signal matching the resonance frequency _f1 from the input signal (oscillation wave) and inputs it to the amplifier A144 via the next stage phase shifter 143-1. The output of A144 passes a signal current through the coupling transformer 15,3 to the three-wire induction wire. The output of the intersecting loop coil 6 on the other moving body side is input to the BPF 8. BPF8 is the frequency band assigned to information signals
The extracted signal wave is sent to the phase shifter PS9 using a BPF with a pass band of f ₁ to f _o . In the PS9, a phase shift described later is performed, and the output amplified by an amplifier 10 is supplied to a non-intersecting loop coil 7. Therefore, the circuit 8-9-10 can be called an information signal or a third amplification circuit.

By the way, the two loop coils 6 and 7 of the moving body
Since one side of the two is crossed, there is no coupling between them even if they are overlapped, and the measured coupling loss is about 60 dB. Therefore, when there is almost no coupling between both loops, the gain μ' of amplifier 10 and 10-
It is possible to set the feedback ratio β' of the loop circuit composed of 7-6-8-9-10 so that μ'β'<1 holds, and in this case, no oscillation occurs. However, when the moving object enters the CS section, the loop coil 6 is connected to the parallel 3-wire induction wire, and the loop coil 7 is connected to the parallel 2-wire induction wire.
If M ₁ is the coupling loss between the loop coil 6 and the parallel 3-wire induction wire, and M ₂ is the coupling loss between the loop coil 7 and the crossed parallel 2-wire wire, then
10-7-M ₂ -4-14-15-3-M ₁ -6-
A feedback loop circuit (referred to as a main feedback loop) is formed by 8-9-10 (abbreviated as 10-14-10, where 14 is the path of _f1 ). Let the gains of amplifiers 10 and 144 in this circuit be μ' and μ, respectively, and the coupling loss of loop coils 6 and 7 and BPF 8.
If the sum of the transmission losses of PS9 is β', then as shown above, μ'β'<1 ......(1) Also, as mentioned above, the parallel three-wire guide line and the parallel two-wire guide lines 1 and 1' If the coupling loss is β', then μβ ₁ <1 ......(2) is established, and furthermore, the above 10-14-1
In the main feedback loop circuit of 0, each loss of transformers 3 and 4, resonator 142, PS 143, and transformer 15 is β ₁
If ignored, the feedback rate β ₂ is the coupling loss
It is given by the product of M ₁ and M ₂ , and β ₂ =M ₁ ×M ₂ , so the oscillation condition can be satisfied by making μμ′β ₂ 1 (3). At this time, the phase of the feedback circuit is generally not necessarily equal to 0° because each circuit element has its own phase shift amount. Therefore, the phase shifter PS143 of the information signal transmitter 14 performs phase correction for each assigned frequency to set it to =0°. However, when a fault occurs in the induction wire 1 or 1' and the transformer 4 or 13 connected to it, the balance is lost and the coupling loss between the transformers 3 and 4 becomes small.144-15-
There is a possibility that the oscillation condition of μβ ₁ 1 will hold for the loop circuit 3-4-142-143-144. In order to prevent oscillation in this loop circuit, it is necessary to make the feedback phase ≠ 0°, so in the main feedback loop circuit of 10-M ₂ -144-M ₁ -10, the feedback phase = 0° must be established. , and further the above 144-15-3-4-142-143-
In 144 subloop circuits, ≠0° (approximately = ±
π/2), the above phase shifter PS9
The phase shifter 143 for each assigned frequency performs phase correction, and the main feedback loop circuit is set to 0° for each frequency. The right sides of β ₂ = M ₁ and M ₂ are coupled to each loop coil 6, 7 and the induction wire so that the coupling loss is smaller than β ₁ and β', respectively (1), (2), (3 ) are satisfied, and oscillation at the frequency set by the switch 141, which is closed by the original information input Di in the information signal transmitter 14, is obtained in the main feedback loop circuit. At this time, the output of the amplifier 144 is also input to the signal detector D16, and the detected output turns off the switch 19.
When the moving body is absent, the 20-20 feedback oscillation loop circuit is disconnected, the f _o+1 wave stops, and the output D ₄₁ also disappears. In addition, if the above conditions are shown as a numerical example, both M ₁ and M ₂ are approximately
Since the loss is 40 dB, and β ₁ and β' are both about 60 dB losses, it is required from equations (1) to (3) that μ' and μ are 40 dB or more and 60 dB or less.

Now, in the information signal transmitter 14, one of the switches 141 is turned on in response to the original information Di, and 10
-14-10 main feedback loop circuit is configured and oscillation at the set frequency is performed, but at this time, the signal detector 11 on the information signal receiving side selects which of the set frequencies the oscillation (signal) frequency is. Extract
It is detected by the BPF 111 (111-1 to 11-n), an amplifier 112 for each frequency, and a detector 113 to generate one of the outputs D ₀₁ to D _0o for each oscillation frequency. For example, if the switch 141-1 is turned on and the oscillation frequency is determined to be _f1 , the output of the information receiver 11 will be only the _D01 output corresponding to the _f1 wave.

Next, the operation of fault detection in ground-side equipment will be explained. If a fault occurs such as disconnection in the winding of transformer 4 or 13 connected to induction wire 1 or 1' and 1, 1', the wires between transformers 3 and 4, 12 and 13
Because the balance between
One of the oscillation conditions of the feedback loop circuit of 0-15-3-4-17-18-19-20, μ ₂ β ₂ 1, is satisfied, but the other condition is that the feedback phase is not equal to 0°. It is set and 144-
In the subloop circuit of 15-3-4-142-143-144, at frequencies f ₁ to f _o, the phase shifters 143-1 to 143-n are ≠0 as described above.
, so that oscillations of f ₁ to _{f o+1} do not occur. However, for example, if guide line 1 is damaged, 1
44-15-3-4-(142-01)-(143
-01) In the (first fault) loop circuit of -144, the feedback phase of the resonator 142-01 that resonated at the assigned frequency f ₀₁ other than f ₁ to _{f o+1} and this loop circuit is 0 at the frequency f ₀₁ . Oscillation condition = 0 by setting phase shifter PS143-01 so that
Since ° is satisfied, the f ₀₁ wave oscillates.

Furthermore, if the guiding wire 1' is disturbed, the feedback phase for the above f ₀₁ changes by π phase in the transformer 4, so the oscillation of the f ₀₁ wave will not be established, but it will resonate at the assigned frequency f ₀₂ , which is different from f ₀₁ . Resonators 142-02 and 14
4-15-3-4-(142-02)-143-0
2) The _f02 wave is oscillated by the phase shifter PS143-02, which is set so that the feedback phase of the -144 (second fault) loop circuit satisfies =0° at _f02 . A part of the output of the oscillating amplifier 144 is input to the signal detector D16, and the detected output turns off the switch 19, so the 20-20 absent loop circuit is opened and the f _o+1 wave is turned off. does not occur.

Furthermore, if there is a disconnection failure in the loop oscillation circuit including the induction wire 2 and transformers 3 and 12, f ₀₁ , f ₀₂ , f ₁ to f
It does not oscillate at either frequency _o or f _o+1 . Therefore, all outputs of the information signal and fault signal detector 21 become zero, and the occurrence of the above fault can be detected.

Note that a part of the oscillation output of the amplifier 144 is input to the detector 21, and the oscillation frequency is detected by the BPF 211 corresponding to the frequency set in the information signal transmitter 14, the amplifier 212 of each frequency, and the respective detector 213. and outputs by frequency D ₂₁ , D ₂₂ ,
Since only one of D ₃₁ to _{D 3o} is output, it is possible to check each piece of information and detect each fault. Also, a part of the output of the amplifier 20 of the 20-20 absent loop oscillation circuit is input to the moving object absent signal detector 22,
The wave of oscillation frequency f _o+1 is extracted, amplified, and detected, and D ₄₁ is output. To summarize the above, these two
When the two detectors 1 and 22 operate normally, if the moving object is absent in the CS section, the oscillation by the absent loop circuit 20-20 will generate the _D41 output of the absent signal detector 22, and the moving object will be detected in the CS section. when it exists in
An information signal and one of the outputs D ₃₁ to _{D 3o} of the fault signal detector 21 are generated from the oscillation of the 10-10 main feedback loop circuit. In addition, if there is a fault related to the guide wires 1 and 1' in an abnormal situation, the detector 21's D ₂₁ or
D ₂₂ output is generated, and in other failures, oscillation is not performed and both detectors 21 and 22 do not produce output.

Next, detection of normal and abnormal states on the moving object side will be explained. When a mobile object enters the CS section when a fault occurs, if the fault is related to the guide wires 1 and 1', the f ₀₁ wave or f ₀₂ wave is detected by the detector 11 due to the coupling between the guide wire and the loop coil 6.
is extracted by the BPF 111-01 or 111-02 and outputs either D ₁₁ or D ₁₂ . Furthermore, if any other fault occurs, no oscillation occurs, so no output is generated at the detector 11.

As is clear from the above operations, during normal operation
If no mobile object enters the CS section, D ₄₁ at the ground station.
is output and it is determined that the ground station is normal and there is no mobile object.
When a mobile object enters the CS section, the ground station will send D ₃₁ to D.
_3o occurs, the ground station is normal, and the entrance of a mobile object is detected, and at the same time, in the mobile object, the information signal corresponding to the original information Di input to the information signal transmitter 14, that is, the oscillation frequency, is detected by the D of the signal detector 11. ₀₁ ~D _0o
is detected as one of the outputs. When a mobile object advances from the CS section, the state returns to the absence of a mobile object, so the ground station outputs _D41 again and detects the absence of a mobile object and the normality of the ground station. The detection output of this ground station can be sent to a central processing unit, for example, and if guidance lines, that is, CS sections and their ground station equipment are provided here and there along the moving route, the central processing unit can Information transmission to mobile objects (information content is limited to certain types, but can be changed at any time)
It is possible to detect areas where moving objects exist and detect obstacles.

Next, the above explanation is based on the information signal transmitter 14 sent to the ground station.
and information signal receiving circuits 8, 9, 10, 1 to the mobile body.
However, on the contrary, the two loop coils of the moving body are placed at both ends, and the information signal transmitter 14 is provided between them, except for the transmitter 1 shown in FIG.
4 excluding the f ₀₁ and f ₀₂ resonators and phase shifter circuits and the detector 11 are connected, and at the ground station, a BPF is connected between transformers 4 and 3 at the end of the guide line in the CS section.
8. Connect a circuit consisting of the PS 9, amplifier 10, and transformer 15, and connect a series circuit of each of the f ₀₁ and f ₀₂ resonators for failure detection and a phase shifter between the transformer 4 and the amplifier 10, and Each of the 22 circuits is an amplifier 1
If 44 is replaced by amplifier 10 and connected in the same manner as shown in Fig. 2, the ground station can detect the information sent from the mobile object, and the ground station can detect disturbances due to oscillations of f ₀₁ and f ₀₂ . It is also clear that

This case will be explained in more detail as follows.

(a) When the moving object does not exist within the required guide line section, there is no output from the third amplifier circuit and the switch circuit of the moving object absence detection oscillation circuit is closed;
Second amplifier - Synthesizing transformer - First transformer - Guiding wire - Third transformer - Wave transformer - Phase shifter - Fourth transformer - Guiding wire - Second transformer - f _o+1 resonator - A phase shifter-switch circuit-second amplifier feedback oscillation circuit is formed to oscillate the f _o+1 wave, and the absence signal detector 22 detects a mobile object absence signal from the partial output of the second amplifier. (b) When a moving object enters the guide line section, the information signal transmitters f ₁ to f _o on the moving object side and 2 connected to the input/output thereof and coupled to the guide line.
antenna, ground-side guidance line equipment, and third antenna.
A feedback oscillation circuit is formed by an amplifier circuit and a synthesis transformer to oscillate one wave corresponding to an information signal in the information signal frequency f ₁ to _{f o} , and on the ground side, the above information and each fault signal are detected. The frequency of the information signal is detected by inputting the output of the third amplifier circuit to the device 21, and on the moving body side, the output of the first amplifier of the information signal transmitter is input to the information signal detector to detect _the frequency of the information signal.
In addition to detecting the information signal _in (c) In the event of a disconnection fault in the guide wires 1 and 1' and the second and fourth transformers, the oscillation frequency of the fault signal on the ground side will be reduced.
A feedback oscillation circuit is formed by each resonator f ₀₁ and f ₀₂ , each phase shifter, the amplifier in the third amplifier circuit, the combining transformer, and the induction line equipment, and the f ₀₁ and f ₀₂ , and on the ground side, the above information and the output of the third amplifier circuit are input to each fault signal detector to detect the fault signal frequency, and detect the movement existing within this guidance line section. On the body side, the information signal detector 11 extracts and detects a disturbance signal of frequency f ₀₁ or f ₀₂ from the cross-shaped antenna output, and outputs it. If there is a disconnection fault in the loop circuit of the mobile object absence detection oscillation circuit, oscillation will not occur at any of the frequencies f ₀₁ , f ₀₂ , f ₁ to f _o , f _o+1 , and the above information and each fault signal detection This failure is detected when all outputs of the device 21 become zero.

As explained above in detail, in the present invention, a guide wire as shown in FIG. An information signal transmission circuit is installed on either the ground side or the mobile side, and an information signal reception circuit is installed on the other side, and a feedback oscillation loop circuit failure detection circuit including a guide wire is configured on the ground side. This makes it possible to transmit information, detect information, or check information from either side between a mobile object located at an arbitrary point within the required section and the ground station. It is possible to detect entry and exit as well as to detect obstacles. These configurations are particularly suitable for automatic driving control when the moving object is a vehicle using rubber time wheels, and it is also suitable for controlling multiple vehicles. Highly reliable and low-cost equipment for individual control from a centralized control center on the ground, collection of moving object information including position detection of moving objects for automatic control, constant monitoring of ground station equipment failures, etc. It can be obtained at low cost and has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of construction of a guide wire and a loop coil used in the present invention, and FIG. 2 is a diagram showing an example of the construction of the device of the present invention. 1, 1', 2...Parallel 3-line guiding wire, 3, 4, 1
2, 13, 15... Coupling transformer, 6, 7... Loop antenna, 8, 23, 111 (111-0
1,111-02, 111-1 to 111-n),
211 (211-01, 211-02, 211-
1 to 211-n), 221...bandwidth filter BPF,
9, 18, 24, 143...Phase shifter PS, 1
0, 20, 112, 144, 212, 222...
Amplifier A, 11... Information signal detector, 14... Information signal transmitter, 16, 113, 213... Detector D, 17, 142... High Q resonator, 19... Signal switch circuit, 21... Information and fault signal detectors, 22...absent signal detector, 141...switch.

Claims (1)

[Scope of Claims] 1. Transmission of information signals from ground fixed equipment to a mobile object moving on a fixed travel route, detection of entry or departure of a mobile object to a fixed section of the travel route by ground fixed equipment, and ground fixed equipment This is a device that detects transmission path failures on a moving body and on ground fixed equipment, respectively, and includes three parallel guide wires 1, 1', 2, and a second transformer 4 and a fourth transformer 13 connected to both ends of the outer wires 1 and 1' of the guide wire, respectively, and a second transformer 4 and a fourth transformer 13 connected to both ends of the center wire 2 of the guide wire, respectively. The first transformer 3 connected between the midpoints of each of the four transformers 13
and the third transformer 12 to form a transmission line on the ground side, and specific frequencies f ₁ to f _o of information that are provided on the ground fixed equipment side and are assigned in advance to the information Di to be sent to the mobile object. A pair of loop coils 6, 7 and an information signal amplification circuit 8, which are mounted on the guide wire equipment and the moving body, transmit the selected frequency only when the moving body is present in the certain area. 10, and furthermore, when a fault occurs in the guiding wire equipment, a feedback loop circuit is formed using the faulty guiding wire equipment at specific frequencies f ₀₁ and f ₀₂ of the fault, which are assigned in advance according to the fault situation. and select switches 141-1 to 141-n for specific frequencies of the information.
and each resonator 1 of said information and the specific frequency of the disturbance.
42 and phase shifter 143 and common amplifier 14
4, the input side of the information frequency selection switch and the disturbance frequency resonator of the circuit consisting of 1 transformer 3 to form a feedback oscillator circuit together with the feedback loop circuit, and to generate an output at the specific frequency of the information selected by the selection switch and the specific frequency according to the fault condition; , a coupling for outputting the output of the information signal transmitter 14 and the output of the amplifier 20 of a specific frequency f _{o +1,} which is oscillated when no moving object is present within the predetermined section, to the first transformer 3 of the guide line equipment. transformer 15,
The movement is formed by conducting the signal switch circuit 19, which opens and closes depending on the presence or absence of a signal output from the information signal transmitter 14, when there is no moving object within the certain section and the guide line equipment is free of faults. a resonant amplifier circuit consisting of a resonator 17 with a specific frequency f _{o +1} , a phase circuit 18, and an amplifier 20, the second transformer 4 connected to the input side of the circuit, and the coupling transformer connected to the output side of the circuit; a wave circuit 23 of a specific frequency f _o+1 connected between the third transformer 12 and the fourth transformer 13 of the guide line equipment including the first transformer connected through the guide line equipment; and a feedback loop circuit formed by the phase shifter 24, which detects the output of the information signal transmitter 14 and detects the output of the information signal transmitter 14, and detects the specific frequency f ₁ of the information.
Discrimination output of f _o and fault specific frequencies f ₀₁ and f ₀₂
The specific frequency f _o+1 indicating the absence is obtained from the information and failure signal detectors 21 that output D ₃₁ to D _3o , D ₂₁ , and D ₂₂ and the output of the amplifier 20 in the oscillation circuit when the mobile object is absent. an absence signal detector 22 that extracts and outputs an absence signal D ₄₁ and sends information to the moving object;
Ground fixed side equipment that detects the presence or absence of a mobile object within a certain section and detects a fault in the ground side transmission line;
The three guide wires 1, 1', and 2 are placed on a moving body.
A pair of loop coils includes a crossed loop coil 6 which is inductively coupled to the above-mentioned two outer wires 1 and 1', and a non-crossed loop coil 7 which is inductively coupled to the two outer wires 1 and 1' of the above-mentioned guide wire. information signal amplification circuits 8 to 10 that input oscillation signals of specific frequencies f ₁ to f _o of information, extract the specific frequency band, amplify the amplified signal, and output the amplified signal to the non-crossing loop coil 7; and the guide wire. Outputs D ₁₁ and D ₁₂ obtained by differentially detecting the specific frequencies f ₀₁ and f ₀₂ of the fault input from the crossed loop coil 6 when a fault occurs in the equipment.
and an information signal detector 11 that generates outputs D ₀₁ to _{D 0o} by differentially detecting specific frequency f ₁ to f _o signals of information from the ground fixed equipment from the outputs of the information signal amplification circuits 8 to 10. What is claimed is: 1. An information signal transmission device comprising mobile equipment that receives information from the ground side and detects faults in the ground side transmission path. 2 The information signal transmitter transmits information at specific frequencies f ₁ to f _o
Selection switches 141-1 to 1 for selecting one of the
41-n, and each resonator 142-1 to 1 of the specific frequency of the information and the specific frequency f ₀₁ and f ₀₂ of the fault.
42-n, 142-01, 142-02 and phase shifters 143-1 to 143- for their respective frequencies.
143-01, 143-02, and an amplifier 144 that shares the output of each of these circuits, and the input of each series circuit is connected to the second transformer 4 of the induction wire equipment. Further, the output of the amplifier 144 is outputted to the first transformer 3 of the guide line equipment via the coupling transformer 15, and a detector 16 for detecting the feedback oscillation output due to the specific frequency of the information and the fault. 2. The information signal transmission device according to claim 1, wherein the information signal transmission device is connected to each of the fault signal detectors 21. 3 The information signal detector 11 detects the specific frequency f ₁ of the information
It is composed of a wave generator ₁₁₁ , an amplifier 112, and a wave detector 113 that extract f _o and interference signals f 01 and f ₀₂ , respectively.The information signal input is the output of the amplifier 10 of the information signal amplification circuit, and the interference signal input is the output of the amplifier 10 of the information signal amplification circuit. 2. The information signal transmission device according to claim 1, wherein either the information or the fault signal is extracted by inputting the outputs of the intersecting loop coils 6 coupled to the guide wires. 4. Transmission of information signals from a mobile object moving on a fixed travel route to ground fixed equipment, detection of entry or departure of a mobile object to a certain section of the travel route by ground fixed equipment, and detection of transmission line failure of ground fixed equipment. It is a device that performs both on ground fixed equipment and moving objects, and it consists of three parallel guide wires 1, 1', and 2 at equal intervals laid along the travel route for each required section of the travel route, and the guide wires. a second transformer 4 and a fourth transformer 13 connected to both ends, respectively; and a first transformer connected between both ends of the center wire 2 of the guide wire and the midpoints of the second transformer 4 and the fourth transformer 13, respectively. A guide wire facility comprising a transformer 3 and a third transformer 12 and forming a ground side transmission line;
The three guide wires 1, 1', and 2 are placed on a moving body.
A pair of loop coils consisting of a cross-shaped loop coil 6 that is inductively coupled to the two outer wires 1 and 1' of the guide wire, and an optical differenceless loop coil 7 that is inductively coupled to the two outer wires 1 and 1' of the guide wire, and a pair of loop coils that are installed on a moving body and connected to ground fixed equipment. Information to be sent
Specific frequency f ₁ of information assigned in advance to Di
~ f _o is selected and set, and the pair of loop coils, the guide wire equipment on the ground fixed equipment side, and the information signal amplification circuit 8 ~ 10 form a feedback loop circuit, selecting switches 141-1 to 141-n for specific frequencies of the information, resonators 142-1 to 142-n for each frequency, phase shifters 143-1 to 143-n, and The input of the selection switch on the input side of the circuit consisting of a common amplifier 144 is connected to the crossed loop coil 6, and the output of the amplifier 144 is connected to the non-crossed loop coil 7.
an information signal transmitter that is connected to each of the above to generate a feedback oscillation output of a specific frequency of the information, and a fault information signal sent from the ground fixed equipment side is inputted from the crossed loop coil 6, and the specific frequency f ₀₁ , f ₀₂
differential detection outputs D ₁₁ , D ₁₂ and the information signal transmitter 1
The information signal detector 11 outputs feedback oscillation signals f ₁ to f _o discriminative detection outputs D ₀₁ to _{D 0o} based on specific frequencies of information signals from the output of the information signal detector 11. A feedback oscillation signal is inputted from the output of the second transformer 4 of the guiding line equipment provided on the moving body side equipment for detection and the ground fixed equipment side, and a specific frequency band of information from f ₁ to _{f o} is extracted and amplified. an information signal amplification circuit 8 for outputting the output to the first transformer 3 of the guide line equipment via the coupling transformer 15;
10, and a specific frequency f ₀₁ of the fault, which is assigned according to the fault situation when there is a fault in the guide line equipment,
The output of f ₀₂ is transferred to its resonant circuit 142-01, 142
-02, phase shift circuit 143-01, 143-02,
It is formed by a feedback loop circuit of the above-mentioned guide line equipment including a ground side circuit consisting of an amplifier 10, the above-mentioned second transformer 4 on the input side, and the first transformer 3 on the output side via the coupling transformer 15. a fault signal sending circuit that outputs a fault signal from an oscillation circuit to the guide line, a signal output of the information signal amplification circuits 8 to 10, and a specific frequency f _{o +1} when the moving body is not within the certain area;
a coupling transformer 15 that outputs the feedback oscillation signal output in the absence of a moving body to the first transformer 3 of the guide line equipment;
A signal switch circuit 19 that opens and closes depending on the presence or absence of signal output from the information signal amplification circuits 8 to 10 is formed when there is no moving object within the certain section and the guide line equipment is fault-free. a resonant amplifier circuit comprising a resonator 17 of a specific frequency f _o+1 in which the moving body is absent, a phase shift circuit 18, and an amplifier 20, the coupling transformer 15, and a first transformer forming a feedback loop circuit thereof; 3. Guide wire, third transformer 1
2, f _o+1 bandpass filter 23 and phase shifter 24, fourth
An oscillation circuit is formed by the transformer 13 and the second transformer 4 to perform feedback oscillation at the specific frequency f _{o +1} , and an output of the amplifier 20 of the oscillation circuit when the mobile object is absent. Absent signal detector 2 that differentially detects the absent frequency f _o+1 and outputs an absent signal D ₄₁
2, and differential detection outputs D ₃₁ to D _3o , D 21 of specific frequencies f ₁ to f _o of information and specific frequencies f ₀₁ and f ₀₂ at the time of transmission path failure from the outputs of the information signal amplification circuits 8 to ₁₀ ,
It consists of information that outputs D ₂₂ and each fault signal detector 21, receiving information from a moving object, detecting faults in the ground transmission line, and ground fixed equipment that detects the presence or absence of a moving object within a certain section. An information signal transmission device characterized by: