JPS5844243B2 - Information transmission to mobile objects and position detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the transmission of information signals from the ground station to the mobile body in the transmission of information signals by guided radio between a mobile body such as a vehicle traveling on a fixed road and a ground (fixed) station. The present invention relates to a device that allows a mobile object to receive information using the above-mentioned signals and also to use the same to detect its own position on a traveling road and to detect a failure of the device.

Conventionally, a feedback oscillation circuit is configured at a certain point on a travel route by a ground device installed at that point and a mobile tower-mounted device, and the oscillation frequency is set to a predetermined value depending on the information type (information content). By doing so,
Fixed-point type (intermittent type) that obtains information by detecting the frequency oscillated by the mobile body or ground station when the moving body and ground equipment approach each other and the electromagnetic inductive coupling becomes tight, and the fixed-point type (intermittent type) that obtains information by detecting the frequency that oscillates when the moving body and ground equipment become close and the electromagnetic inductive coupling becomes tight. A continuous method is used in which an information signal is transmitted from one end of the line, and the information signal is received and demodulated by an antenna connected to this guiding wire in mobile devices, but a fixed point method is used to transmit information and move information at a point other than a fixed point. There were problems such as the inability to detect the position of a body, and the continuous type, which can always transmit information, cannot detect the position of a moving object and requires a separate device to detect the position.

Furthermore, recently, applications such as automatic driving control of vehicles, especially automatic driving control of multiple vehicles on the same route, require multiple functions with minimal equipment, such as information signal transmission, moving body position detection, obstacle detection, etc. has been done.

The present invention was made in order to solve the above problem, and in particular transmits information such as commands from a ground station to a vehicle moving on a fixed traveling route using rubber tire wheels as a guideway. The feature is that it is possible to detect the self-position on the mobile side using be.

The present invention will be explained in detail below with reference to Examples. FIG. 1 is a side view of the configuration of equipment on the ground fixed side (hereinafter referred to as the ground station side) in which the present invention is implemented.

1゜2.3 in the figure is a parallel three-wire guide line laid along the running line, and the outer two lines 1 and 3 are one section S on the running route.
An intersection is made at each division point of subsections A, B, C, and D, which are subdivided into subsections, and guide line 2 is a line extending in the center of 1 and 3 and in the same plane as 1 and 3.

4,5゜8.9 is a coupling transformer, and both ends of the above-mentioned induction wires 1 and 3 are connected to transformers 5 and 9, respectively, and the induction wire side coils (primary coils) of transformers 5 and 9 are respectively connected to the transformers 5 and 9. ) The primary coils of transformers 4 and 8 are connected between the neutral point tap of the coil and the terminal end of the induction wire 2 as shown in the figure.

The secondary coil of transformer 5 has at least a frequency fo-fn.
Signal amplifier (A) that can amplify input waves in the +1 band
A signal detection circuit 7 is connected to the output of the signal amplifier 6.

Transformers 9 and 8, output 10 is an information signal (frequency) setting circuit, and information (digital encoded) input D1
is input via the information transmission control and failure detection circuit (C.C.) 11 and the information transmission control line 12.

Further, 13 is a signal detection line, 61 is a BPF (bandwidth filter) that passes frequencies 11 to fo to which the output of the transformer 4 is supplied, 62 and 64 are high Q resonators, and 63 and 65 are phase correction circuits. (PS) The internal circuits of 7 and 10 will be explained in the operation description below.

Next, in the information signal setting circuit 10 to which the transmission control signal SC based on the information Di is input, only one of the switches 101 to 1101 n is closed depending on the content of the signal SC.
, frequency 11., which is prearranged in accordance with the type of information D1. f2. . . . High Q resonators 102-1 to 102-n, such as electro-mechanical resonators or ceramic resonators, which resonate with each of fn, frequencies f,, f2. ---
--・-fn each phase compensation circuit (PS) 103-
1 to 103 n, forming a 9-10-8 loop circuit with a frequency corresponding to a closed switch.

Also, at the other end of the guide wires 1, 2, and 3, the transformer 4-BPF61
An amplifier 6-transformer 5 loop circuit is constructed.

Note that the guide lines 1 and 3. A transmission line consisting of transformers 5 and 9, and a guiding wire 2. Mutual interference between the transmission line composed of transformers 4 and 8 is important in the device of the present invention as described below, so the balance of the transmission line is improved, for example, by reducing the primary order of transformers 5 and 9. If you make adjustments in advance by connecting a balancing potentiometer between both terminals of the coil and the neutral point, and a balancing capacitor between the induction wires 1 and 2, and 3 and 2, the LF (Low Frequency 30KHz ~ 300K
Hz) band and the guiding wire length is within several kilometers, at least about 4
A coupling loss of 0 dB was obtained.

Furthermore, one end of the guide line has a BPF 61 and an amplifier 6.
．． A loop circuit (this will be referred to as circuit A) is formed of the 6-5 lead wire 1 and the 3-9-10-8 lead wire 24-61-6, the other end of which is connected to the signal setting circuit 10.

The gain μ of the signal amplifier 6 is determined by μ>β and the amplifier 6, where β is the transmission loss (feedback factor) of the 5-guide wire 1 and 39-10-8-guide wire 2i-61 paths excluding the amplifier 6 in the loop circuit. If the phase difference between the input and output of
) oscillation is performed.

That is, at this time, the prisoner circuit forms a first feedback oscillation circuit.

On the other hand, the gain μ of 6 is determined by the guide lines 1 and 3. A transmission line consisting of transformers 5 and 9, and a guiding wire 2. Letting M be the coupling between the transmission line composed of transformers 4 and 8, 6-5-guide wire 1 and 3-9-
In order to prevent the loop circuit (8 circuits) formed by the path of M-8-guide wire 2-4-61-6 from oscillating, if the coupling loss of M is γ, the feedback rate l of the above loop is , since the transmission loss of the path excluding M is sufficiently small compared to γ, it can be seen as γ=:=I, where μγ is 1, which is the non-oscillation condition.
become one.

Therefore, if the gain μ of the amplifier 6 is 1β1 × 1μm × 1γ1, the above 6-5-1 and 3-9-10-8-2-4-61
-6 loop circuit (4) oscillates, and 6-6 including the above M
5-1 and 3-9-M-8-2-4-61-6) satisfy the two conditions of not oscillating.

To show this in an actual numerical example, μm is 20 dB, γ = l = minimum value of coupling loss 30 dB, feedback factor β of loop circuit (4)
=10 dB (the transmission loss of the high-Q resonator 102 is large)
Met.

In this case, if loop circuit A is configured, ltβ=20−
When 10=10 dB, the oscillation condition μβ deficiency 1 is satisfied, and when the loop circuit B is configured, μγ=20−30=−10 dB, and the non-oscillation condition μγ<1 is satisfied.

Also, since a phase shift occurs in the transmission circuit at this time, the information signal setting circuit 10 is provided with a phase compensation circuit (PB) 103 for each agreed frequency, and the feedback phase of the loop circuit (4) is changed to positive feedback, that is, φ= Compensation is made so that it becomes 0.

Therefore, when the first feedback oscillation loop circuit of the amplifier is configured by the inductive wire, coupling transformer, resonator, etc. as described above, and any one of the switches 1011 to 101-n is selectively connected according to the information Di, It oscillates at a frequency set by the resonator 102 and PS 103 determined by the switch.

Next, a signal detection circuit 7 connected to the output side of the amplifier 6 has a BrF31 (0, 1
... n , n+1 ) and amplifiers 72 0 to 72 n+1 of signals from each BPF and subsequent detectors 73-0 to 73-n+1, and selects the oscillation frequency component set by Di. To detect.

This detection output is inputted to the information sending control and failure detection circuit (CC) 11 through the signal detection line 13, where it is checked to see if it matches the information Di to determine whether there is a failure.

That is, first of all, if the information signal setting circuit 10 or the frequency setting or frequency detection circuit 11 to fn of the signal detection circuit 7 fails, it is only necessary to check which one is the failure because no coincidence can be obtained in the C-C circuit 11. .

Guide wires 1 and 3. Transmission line and guide line consisting of transformers 5 and 9 2. Balance is maintained between the transmission line formed by transformers 4 and 8 under normal conditions.

(As mentioned above, the coupling loss is, for example, about 40 dB)
However, if the guide line 1 or 3. Alternatively, if either the induction wire side of the transformer 5 or 9, that is, the two windings of the primary coil is disconnected, the balance between the transmission lines will be lost, and the coupling between the transmission lines will increase, reducing the coupling loss.

As a result, the loop circuit between amplifier 6 and the output is as follows.
~0].

(1) 6-5-4-61-6. In this loop circuit, the output phase difference of amplifier 6 becomes positive feedback (ψ=0) is the above-mentioned 6-5-guide wire 1 and 3-910-8-guide wire 2.
- When a 4-61-6 loop circuit is formed, and a disconnection occurs between 5...4 of these loop circuits, resulting in a 6-5-4-61-6 loop circuit. Therefore, the output phase difference ψ of amplifier 6 at this time is 0, and no positive feedback loop circuit is formed, so there is no oscillation.
Therefore, it does not interfere with the operation of (2)0]).

(2) 6-5-62-63-6. This loop circuit is formed when either the induction wire 1 or the primary coils of the transformers 5 and 9 connected to the induction wire 1 is disconnected. For example, if one of the primary coils of the transformers 5 and 9 is disconnected. Transmission between 5 and 4 is performed by a circuit consisting of the primary coils of transformers 5 and 9 connected to induction wire 3, transformers 4 and 8, and induction wire 2, and 6-5-62-63 -6 loop circuit is established.

At this time, the phase correction circuit PS63 corrects the positive feedback phase of φ=O so that this loop circuit oscillates, and the resonator 6
2 resonance frequency f.

to oscillate.

For example, if the amplification μ of the amplifier 6 is 20 dB, the feedback factor I of the loop circuit in (2) is approximately the loss of the resonator 62 (-io
dB), then μ1=2o-10=1odB and f.

Wave oscillation occurs.

(3) 6-5-64-65-6゜This loop circuit consists of the induction wire 3 or the transformer 5 connected to 3.
and 9 are disconnected, and the transmission line between transformers 5 and 4 is connected to transformers 5 and 9 connected to guide wire 1.
It consists of a primary coil, transformers 4 and 8, and a guide wire 2.

By the way, in the loop circuit (2), the primary coils of transformers 5 and 9 connected to the induction wire 3 are the path, whereas this (
In the loop circuit of 8), the primary coils of transformers 5 and 9 connected to the induction wire 1 serve as the path, so the transmission phase from transformer 5 to transformer 4 is reversed from the case of 0] and becomes ψ-180. °.

Therefore, in this case, f via the resonator 62.

The output phase of the wave amplifier 6 becomes a negative feedback type and cannot oscillate.

However, by adjusting the phase correction circuit PS65, the resonator 64
In the loop circuit of 0 for the resonant frequency fn+x, the output phase of the amplifier 6 can be made to be a positive feedback, so in this case, it oscillates at the frequency fn+1.

If the loop circuit configuration is (2), the fn1,11 wave oscillation will not oscillate because the angle will be ψ-180°.

Note that the loop circuit according to (3) or 0] will be referred to as a second feedback oscillation circuit.

Next, determination of the failure location will be explained.

When the loop circuit (2) is formed, f.

Since the wave oscillates, a part of the output of the amplifier 6 is input to the signal detection circuit 7, and the BPF 71-0 outputs f.

The waves are extracted and sent to amplifier 72-0. The signal f detected by the wave detector 73-0.

The wave output is input to the information transmission control and failure detection circuit C-C11 via the signal detection line 13.

In C-C11, input f.

When the level of the wave is compared with a certain standard level, if it is thicker, it is determined that there is a failure in the oscillation described above, and the cause is displayed or an alarm is generated to distinguish it from other failures.

(The methods for displaying these and issuing warnings are publicly known).

Also, when the loop circuit (3) is formed, the fn+1 wave oscillates in the same way, so in the signal detection circuit 7, the BPF 71 n+1. Signal detection is performed on the path of DET73-n+1 and sent to CC11.

At this time, in CC11, the level comparison circuit for the fn+1 wave determines that there is an oscillation failure as described in (3) above, and generates a display or alarm that distinguishes it from other failures.

It should be noted that there is a disconnection fault at the above position, and the above f.

Or fn, if oscillation of 1,000 waves is possible.

Alternatively, the fn11 wave causes an oscillation current to flow through the guide wires 1 and 2 or 2 and 3 as transmission waves.

Furthermore, the induction wire 2 or a transformer 4 connected to the induction wire 2
Information from C-C11 is that when the primary coil of 8 and 8 are disconnected, the loop circuit of the 6-5-guide wire 1 and 3-9-10-8-guide wire 24-6 is broken at the above location. Since all of the set frequencies 11 to fn are not oscillated by the transmission control, and the transmission from transformer 5 to 4 is also cut off, f.

, fn+1 waves also do not oscillate.

Furthermore, if there is a failure in the secondary coils of the transformers 5 and 9, that is, the coils connected to the amplifier 6, the information signal setting circuit 10, the information signal setting circuit 10, the BPF 61, the amplifier 6, etc., the loop circuit is disconnected and f n = f o
, f n+t .

Therefore, there is no signal detection output from the signal detection circuit 7, and c
-cii makes a judgment that there is no detection output for each wave of f1 to fn, fo, fo+1, and when it is judged that there is no signal for each loop circuit formation, an alarm and display are issued that are distinguished from cases (2) and (3). occurs.

f in these failure detections in C-C11.

and f. The input level from the signal detection circuit 7 of each +1 wave is compared with the standard value (for example, 0.5V), and if the input level is O~0, 5V, it is "0" (no fault), 0.
．． If it is 5V or more, it is judged as 1" (failure has occurred).

For detection inputs of 11 to fn waves, for example, if the input level is O to 0.5V, it is determined to be 0'', and if it is 0.5V or higher, it is determined to be 1'', respectively, by separate determination circuits provided inside the C-C11.

If the detection inputs of waves 11 to fn are all O'' and the output of the AND gate based on these inputs is zero, it is determined that there is a failure.

Now, as mentioned above, fault indications or warnings are performed in three categories: loop circuit formation (2) and 0] and other faults.

For example, in the case of a failure in which the switch 101-1 of the information signal setting circuit 10 does not operate, the 11th wave does not oscillate even though it should oscillate, so all detection inputs of the 11th to fn waves become "O", and moreover, the f.

, since there is no oscillation of the fn+1 wave, an alarm or display according to the third category is issued.

Furthermore, in the case of a fault caused by the formation of a loop circuit in (0] or (3), either (2) or (3) and the oscillation of the 11-fn waves also stop, so this fault is displayed or alarmed at the same time.

If it is necessary to limit the display to only one of these three faults, it can be realized by combining logic circuits, but this circuit is omitted because it is a known circuit.

Furthermore, in the event of a failure in which only one or a small number of frequencies among the frequency settings or frequency detection circuits 11 to fn stop oscillating, the above display and alarm will be issued, but from this alone it is unclear whether it is a failure in 10 or 7. Therefore, following this, by manually switching to another information frequency, comparing the information control output from C-C11 and the output of the signal detection circuit 7, and checking whether they match or not, the failure can be detected by C-C11. The range of can be estimated.

Here, returning to the original explanation, the signal setting circuit 10 receives the information Di.
Switch selection or setting is performed by 11~fn
When any one of these oscillations is occurring, the signal current in the traveling section S is as follows.

That is, in FIG.
The signal on the path of transformer 4 (for example, each section of A, B, C, and D has the same phase as shown by the solid arrow in the figure, and the signal from transformer 5 to guide wires 1 and 3 to transformer The signal on path 9 flows only through guide lines 1 and 3 as indicated by the broken line arrow, and there is a π phase change between adjacent small sections.

The above is an explanation of the information signal transmission and failure detection operations on the ground station side.

Next, the equipment on the mobile body side will be explained.

FIG. 2 is a diagram showing an example of the configuration of a device placed on a moving body.

The angle 1°2.3 indicates the guide lines 1, 2.3 shown in FIG.

Reference numeral 15 is a cross-shaped loop coil which is crossed at its center as shown in the figure, and is connected to the guide wires 1, 2.3.

Reference numeral 16 denotes a non-crossing loop coil connected to the guide wires 1 and 3.

Note that both 15 and 16 may be made by combining, for example, rod-shaped magnetic core antennas (bar antennas), and as long as their operations are the same, they can have various shapes and structures.

17 is an information signal detection circuit, and 18 is a position section detection circuit.

Although the illustrated circuit 18 is a circuit based on signal phase discrimination as an example, a circuit based on amplitude change detection that utilizes the fact that the output of the non-crossing loop coil 16 changes at each intersection point may also be used.

Further, the information signal detection circuit 17 receives frequencies 11 to fn representing information types set in the ground station and fn for failure detection.

and fn+1 Taya's f which selects each wave and detects the discrimination.

f0~fn, fn+1 Bandwidth wave generator for selective extraction of waves (
BPF) 173 0 to 173 n+1. Amplifier (AM
P) 172-0 to 172-n+ 1, detector (D
ET) 1710-171-n+1, and is also provided with an information judgment circuit and a failure judgment circuit, but these are omitted from the diagram.

The position detection circuit 18 also includes a signal amplification and amplitude limiter (A/
L) 181 and 182. Phase difference discriminator (PD) 183 for the above two signal outputs. Waveform shaper for the output of PD183 (
ST) 184 is provided.

Next, the operation shown in FIG. 2 will be explained.

First, the intersecting loop coil 15 is connected to the guide wires 2, 1, and 3, so that when the moving object is running, the intersecting loop coil 15
A phase-continuous signal (indicated by solid arrows in FIG. 1) that is unrelated to the intersection of 3 and 3 is output.

Next, the non-crossing type loop coil 16 is coupled to the guide wires 1 and 3, and when the moving object is running, a coupling phenomenon of amplitude attenuation and phase reversal of the coupled output is generated at the intersection position of the guide wires, and in the adjacent section of A-D. Outputs a signal with a phase difference of π radians.

The signals induced in the loop coils (antennas) 15 and 16 are sent to A-L181 and A-L1 of the position detection circuit 18.
82 and are amplified to the required level and then limited to a constant amplitude.

This suppresses fluctuations in the degree of coupling between the induction wire and the loop coil as the moving body travels, and produces a signal at a constant level.
Phase difference discriminator PD1 from Ll 81 and A-L182
83, and phase difference discrimination between the two human forces is performed.

As mentioned above, the phase of the output signal A-L181 from the loop coil 15 is a constant continuous phase in the entire section A-D, and the phase of the output signal A-L182 from the loop coil 16 is in the small section A-D. changes by π radians each time.

In addition, as a practical matter, the formation of the feedback oscillation circuit of the ground station is as described above using 6-5-guide wire 1 and 3-9-10-8-guide wire 2.
-4-61-6 loop is used, but each of these components has its own phase shift amount, so the current phase of guide wires 1 and 3 and the current phase of guide wires 2 and 1.3 are different. .

For example, the resonator 102 and BPF that constitute the oscillation circuit
The amount of phase shift of BPF 61 is large compared to other components, and even if the output phase of amplifier 6 is in phase between the guide wires 1, 3 and 2.1.3, only the amount of shift of BPF 61 will occur. do.

Note that the deviation of the phase shift due to each of the resonators 102-1 to 102-n is determined by the phase shift deviation of each of the resonators 102-1 to 102-n.
Since the output of amplifier 6 is adjusted to provide positive feedback at 103 n, the phase deviation between the 11 to fn waves is KQ.
' is corrected to '.

For example, since the BPF 61 has a phase shift amount of π/2 to 2π/3, there is a deviation of the same amount between the guide lines.

Therefore, the phase deviation between the loop coils 15 and 16 coupled thereto also has the same amount of phase deviation in the same small section.

For this reason, there is a deviation in the phase of the signal output due to the inductive wire coupling between the loop coils 15 and 16, which is equal to the amount of phase shift of the BPF 61. Therefore, the phase difference discriminator PD18
The two inputs of No. 3 also have this deviation in phase shift amount.

On the other hand, PD183 has a phase difference of 0° (
When the positive (e) maximum output is 180° (out-of-phase, π
), negative (→maximum output is output, and 90°
(π/2) and 270' (3π/2), there is no output and 0. If we use an input phase difference-output characteristic with an input phase difference of 0), the specific phase shift amount of the loop coil output will be It is almost constant.

For example, in order to obtain a positive maximum output when coupled in section A, a phase correction circuit is provided on the input side of the PD 183 and adjustment correction is made in advance so as to give a constant amount of phase shift.

Now, when a moving object moves, for example, in sections A and C, two people's power to the PD 183 is in the same phase due to the above phase correction, and the PD 183 outputs level (e), and in sections B and D, the guide lines 1 and 3 are Since they intersect at the dividing point, the output of the loop coil 16 connected to this will be an output whose phase is inverted from that of the adjacent section, so the two-man power is in reverse phase, and the PD 183 outputs (→ level, so the waveform of the next stage is Shaper (ST)
In 184, if the input is (G) level, it is H level, and the input is (G) level.
→ If the level is zero, each output of L level is generated, and either of these two values, H or L, is output alternately for each section.

In order to detect the position of a moving object from this output, it is sufficient to know the number of changes in sections set in advance on the travel route using a level change counting circuit, etc., and then display, for example, the section number. is omitted because it is publicly known.

Note that even in the event of a failure in which the feedback oscillation circuit is formed as shown in (2) or (3), the loop coils 15 and 16 are connected to the guide wires 2 and 3 or 1 and 2, and each section is continuous from the loop coil 15. Since a phase signal output is obtained, and a signal output in which the phase changes by π radians at the intersection position of the guide wires is obtained from the loop coil 16, the section position number during running can be obtained.

Next, in order to detect information from the ground station on the mobile body side, the signal output of the crossed loop coil 15 is sent to the information signal detection circuit 17.
Also input fo, f1 to fn.

By selectively extracting the waves in fn+1, information on the allocation for each frequency can be obtained.

As mentioned above, the output from the combination of the guide wires 2, 1, 3 (2 and 3 in ■, 1 and 2 in ■) and the loop coil 15 is continuous regardless of the intersection of the guide wires 1 and 3. Since the amplitude is constant depending on the phase, even if a moving object stops at an intersection, the delivery of the information signal will not be stopped or interrupted.

Therefore, it is selected by one of the BPFs 173 that matches the signal frequency of the output of the loop coil 15, amplified by the amplifier 172, and then detected by the detector (DET) 171.

Although the output of each detector is not shown in Fig. 2, it is supplied to a circuit that discriminates information signals and determines failures, outputs and displays information Di from the ground station, detects fo or fn waves, and stops waves. If (no signal) is detected, it is possible to determine a failure on the ground station side, on both the ground station and the mobile station, on the transmission path, etc., and display the output.

In the apparatus implementing the present invention as described in detail above,
An information signal wave is transmitted from the ground station by oscillating it by configuring a feedback loop oscillation circuit including a guide line, and the mobile body picks up the information from the ground station with two types of loop antennas coupled to the guide line. From now on, it will be possible to detect the self-position of a mobile object and the information content (type), or to detect the occurrence of failures on both sides of the ground and mobile objects, and to detect each failure separately.
In particular, even when a vehicle moves on a fixed road using rubber tire wheels, a control signal is transmitted from a ground station for driving control, and the vehicle receives the control signal and further uses this signal to determine its own position on the road. Not only can it be detected, but also the occurrence of a failure and the location of the failure can be detected by providing a small additional circuit, making it significantly more economical and highly reliable than conventional systems.

Further, in the event of a failure other than the oscillation stop, self-position detection continues as described above, so there is no loss of position detection during automatic stop, and there is an advantage that maintenance reliability is high.

[Brief explanation of drawings]

FIG. 1 is a side view of the configuration of the ground station side device, and FIG. 2 is a side view of the configuration of the mobile side device. A, B, C, D...Division section of driving route, 1, 2゜3.
...3-wire induction wire, 4, 5, 8, 9... (coupling) transformer, 6... amplifier (4), 7... signal detection circuit,
DESCRIPTION OF SYMBOLS 10... Information signal setting circuit, 11... Information sending control and failure detection circuit (CC), 12... Information sending control line, 13... Signal detection line, 15... Intersecting loop Coil, 16... Non-crossing loop coil, 17... Information signal detection circuit, 18... Position section detection circuit, 61...
...BPF162.64...Resonator, 63,65...
- Phase correction circuit (PS), 710 to 71-n+1- center frequency is f, respectively. , fl, f2...fn+1 BPF. 72-0~7
2-n+1...Amplifier, 73-0 to 73n+1
...Detector, 101-1 to 101-n...Switch, 102-1 to 102-n...Resonator, 103-1 to
103-n...phase compensation circuit, 1110-171-n
+1...-detector, 172~0~172-n+1...
Amplifier, 173-0 to 173-n+1-BPF, 1
81, 182-Amplification and amplitude limiter (A-L), 183
... Phase difference discriminator (PD), 184 ... Waveform shaper (ST).

Claims (1)

[Scope of Claims] 1. Two intersecting parallel lines 1 and 3 extending over a plurality of sections pre-divided along the running route and intersecting each other at each section point, and at the center between the two lines. A parallel three-wire guide line consisting of single wires 2 stretched in parallel, and a first transformer 5 in which a primary coil is connected to each of both ends of the two intersecting parallel wires.
and a second transformer9. 1 between the neutral point of the primary coil of each of the transformers and the termination of the single conductor wire on the same side.
A third transformer 4 and a fourth transformer 8 to which respective secondary coils are connected. A signal amplification circuit consisting of a band transmitter 61 and an amplifier 6 connected between the secondary coils of the first transformer and the third transformer provided at one end of the parallel three-wire induction wire;
A resonator 102 and a phase shifter 103 for each frequency connected between the secondary coils of the second transformer and the fourth transformer at the other end of the wire induction wire and set in advance in the information type are selected based on the input information. A first feedback oscillation circuit for information transmission by the guiding line, the transformer, the signal amplifying circuit, and the information signal setting circuit is configured by the information signal setting circuit 10 consisting of a switch group 101, and the cross-shaped guiding line 1 , 3 and 1st. When there is a disconnection fault in either of the primary coils of the second two transformers 5.9, resonators 62 for each fault category oscillate frequencies fo and fn+1 that are different from the information signal setting frequency for each fault category. 64 and phase shifter 6 for phase correction
3.65 and signal amplifier 6. The first transformer 5 and the third transformer 4 constitute a second feedback oscillation circuit at the time of the above-mentioned fault, and from the oscillation output of this oscillation circuit, a signal is detected which is selectively extracted according to the frequency at the time of the above-mentioned fault and the set frequency based on the above information. Circuit 7. A switching control signal is sent to the switch group 101 for each input information Di, and a second signal is sent from the output of the signal detection circuit.
The establishment of operation of the feedback oscillation circuit and the stoppage of the operation of the first feedback oscillation circuit are determined, and the display or alarm output is performed, and the control output of the information type and the signal detection circuit are used to determine whether the operation of the first feedback oscillation circuit has stopped. An information transmission control and failure detection circuit c-cii is installed to compare the output and determine the range of failure.
In addition, the moving body has a non-crossing loop coil that inductively couples with the magnetic field of the two intersecting guide wires, a cross loop coil that inductively couples with the magnetic field of the three guide wires, and a constant amplitude of both loop coils. The oscillation frequency f of the terrestrial fixed station is determined from the output of the position detection circuit and the cross-shaped loop coil, which detects the presence area of the mobile object from several orders of magnitude. An information signal receiving device comprising an information detection circuit that selectively extracts tf1 to fn, fn+1 and detects the type of information or failure is provided, and the information signal is transmitted from the ground station side to the mobile body,
An information transmission and position detection device for a moving object, characterized in that the moving object receives the information signal and detects its own position.