JPS606582B2 - Information signal transmission equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention 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), and particularly to a non-contact type transmission system using inductive coupling at any point. One of the features is that information signals can be transmitted at any time.

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.
One of two methods is used.

These two systems commonly use electromagnetic induction, but in the fixed point type, for example, the information sending side is configured with inductance L and capacitance C, which resonate sharply at a preset frequency for the information content. A resonant circuit is provided, and a loop circuit consisting of a loop coil and an amplifier is provided on the information detection side to couple with the resonant circuit, and when the resonant circuit is coupled to the loop coil, the loop circuit constitutes a feedback oscillation circuit, and the feedback A8>1, which is well known as a necessary condition for an oscillation circuit to oscillate, = 0 (this)
Let r' be the amplification degree of the amplifier in the feedback oscillation circuit, 8 be the feedback rate of the feedback circuit, and be the feedback phase, that is, the phase difference of the feedback signals. ), the resonant circuit oscillates at a resonant frequency, that is, a frequency corresponding to the type of information. 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 direct modulation format or subcarrier modulation format, and the information receiving side is a receiver that receives and detects information from the transmission path. There are some systems that transmit information by providing a 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 if 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 driving control that reduces the distance between moving objects, the amount of information between the ground station and each moving object is significantly greater than before. Therefore, both the conventional fixed point type and continuous type are becoming unfavorable in terms of function and economy. The present invention is a device suitable for continuously transmitting and receiving information signals even when multiple moving objects using rubber tires are used or when the distance between moving objects is small, and in particular, the information sending device is simplified and equipment costs are reduced. The characteristic is that it decreases. 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.

In the figure, 1, 1', 2 are parallel three-wire induction wires, 3, 4 are (coupling) transformers, 5, 5' are terminating resistors for the induction wires, 6, 7
is a coupling loop coil, and CS is a concession coupling section. As shown in figure a, the conductor lines 1, 1', and 2 are spread out on the same plane at regular intervals of, for example, 30 degrees. Also, a coupling transformer (T
, ) 3 is connected between one end of the induction wire 2 and the midpoint of the primary side of the transformer (T2) 4, and the coupling transformer (T2) 4 is connected between one end of the induction wires 1 and 1'. Terminating resistors 5 and 5' are connected to the other end of the line. The coupled loop coil 6 shown in figure b is an example of a cross type, and in this case, the coil 6 is coupled to the yield line indicated by the broken line and generates a yield voltage by the current in the direction of the solid line arrow in figure a (in other words, However, it 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, the first
As can be easily understood from the figure, the input of the coupling transformer 3 @
generates an output 6 in the coupling loop 6 to transmit a signal by inductive coupling, and the input 2 of the coupling transformer 4 generates an output 6 in the coupling loop 7 to transmit a signal. Also@,
■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 of which is crossed and the other is non-crossed, so there is no coupling, @ The coupling loss between -O and -6 varies depending on the length of the section length CS of the guide wire, the signal frequency, etc., but a B of about 6 can be obtained.

In the present invention, loop coils are used for 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. Also ■−
In order to further strengthen the suppression of coupling between
Known balancing means, such as connecting a balancing variable resistor to the lead wires or connecting a balancing capacitor between each lead wire, shall be provided. In this way, a signal transmission path for each of the coupling coils 6 and 7 can be constructed by using the CS section of the guide wire as a parallel three-wire guide line. FIG. 2 is a diagram illustrating an example of the configuration of the apparatus of the present invention, in which the part above the two-dot chain line constitutes an information signal receiving side apparatus, and the part below constitutes an information bond sending side apparatus.

1, 1', 2, 3, 4, 5, 5', 6, 7 are the same parts as in Fig. 1, 8 is an amplifier, 9 is a signal detector, 10' is an information transmitter, and 11 is a Amplifiers 12 (12-1 to 12-n) are information signal changeover switches (SW), 13 (13-1
~13-n) are high-Q resonators or resonant circuits such as electromechanical resonators, 14 (14-1~14-n) are phase shifters (PS), and 15 (15-1~15 -n) is a filter filter (BPF), 16 (16-1 to 16-n) is an amplifier, and 17 (17-1 to 17-n) is a signal detector.

Next, these operations will be explained. First, on the information layer sending side, the output of the amplifier 11 passes through the coupling transformer 3,
A signal current is passed through the parallel three-wire transfer line consisting of lines 1' and 2.

On the other hand, the signal current flowing through the parallel two-wire induction line composed of the induction wires 1 and 1' passes through the coupling transformer 4 to the information signal transmitter 10.
Enter. In the information signal transmitter 10, one of the switches 12 is closed depending on the information to be transmitted, that is, the original information. For example, when the switch 12-1 is closed, the resonator 13-I extracts the input signal whose resonant frequency LI matches the resonant frequency LI and transmits it to the next stage phase shifter (PS) 14.
Output to 1. As for PS, which will be explained later, the f wave is sent to the above amplifier 11 via this 14-1. In this way, in the signal sending device, there is no coupling between the three parallel wires 1, 1', 2 and the two parallel wires 1, 1' (as mentioned above, there is a coupling loss of about 6th generation). In the loop circuit of 11-3-4-10-11, the peak 8<1 between the gain peak of the amplifier 11 and the feedback factor 8 is expressed as the coupling between the parallel 3-wire inductive line and the parallel 2-wire inductive line. Since the setting is made such that the feedback phase Mi0 is established, oscillation does not occur. On the information signal receiving side, the output of the amplifier 8 is then fed into a coupling loop coil 7 and also into a signal detector 9.

Further, the output of the coupling loop coil 6 is given to the input of the amplifier 8. Even if these two coupling coils 6 and 7 are placed on top of each other, the coupling loss is about 6B, so the gain A' of the amplifier 8 and the feedback factor 8' of the loop circuit of 8-7-6-8 are Since it is set so that r'B' 1 is established between the two, oscillation does not occur. Now, in the CS section of the transfer wire, of the two coupled loop coils 6 and 7, coil 6 is coupled to the parallel 3-wire induction wire, and coil 7 is coupled to the parallel 2-wire induction wires 1 and 1', so now M, coupled loop coil 6 and 1,1',
2, and M2 is the coupling loss between the coupling loop coil 7 and the parallel 2-conducting conductive wires 1 and 1', then the feedback due to the coupling between the information bond sending device and the receiving device. A loop circuit 8-4-10-11-3-M,-8 is formed.

In this circuit, numerals 8 and 11 provide gain modulation, and the others determine the feedback rate. Now, the amplification degree of amplifier 8 is
Between the coupling loss 8' of the coupling loop coils 6 and 7, there is 4'B1...'1' as mentioned above. Also, the amplification degree of the amplifier 11, the parallel 3-wire induction wire and the parallel 2-wire induction wire. It is assumed that the following equation holds between the coupling loss 8, and the peak 81<...(21
Furthermore, in the above feedback loop circuit of 8-M2-1 1-M, 1-8 (losses of transformers 3, 4 and information bond transmitter I0 are common to 8), coupling loss is caused as described above. M
, ×M2=8, so Buddha Buddha'82 21......{3
I so that the oscillation conditions are satisfied.

At this time, the phase of the feedback circuit generally does not satisfy =0 because the elements of the circuit have their own phase shifts. Therefore, the phase shifter 14 in the information signal transmitter 10 performs phase correction on each frequency f, ``f2~...'' and sets it to =0.82 The right sides of =M, -M2 are B, , 8' to 4. Since each loop coil and the induction wire are coupled so that the coupling loss is
Oscillation at a frequency set by is obtained in the feedback loop circuit.

For example, M. , M2 together have a coupling loss of about 4MB, 8, .
Assuming that 8' is a coupling loss of 6% as described above, {1) and 2's' and 〃 need to be 4 MB or more and less than 6%.

Now, the information signal transmitter 10 is set with a predetermined oscillation frequency corresponding to the information (content), and the coupling transformer 4 is connected by closing any one of the switches 12-1 to 12-n. If an 8-8 feedback oscillation loop circuit is formed by connecting between the amplifiers 11 and 8-8 M2-4-10-11-3-M and -81, oscillation at a set frequency is performed.

At this time, the signal detector 9 on the information signal receiving side detects the oscillation frequency using the BPF 15, which selects and extracts which of the preset oscillation frequencies, and the amplifier 16 and detector 17 for each frequency. Generates separate output. For example, when the switch 12-1 is closed, the resonator 13-1 and the phase shifter 14 cause the oscillation frequency f to be
, is determined, and the oscillation output from amplifier 8 is 15-1,1
6-1 and 17-1 generate a detection output corresponding to the f wave. Next, FIG. 3 is a diagram illustrating a configuration example of a yield line along a travel route and an information signal transmitting device when the device shown in FIG. 2 is put into practical use. CSo, CS, . CS2, . . . is a section (length) divided along the running line, 18 is a terminating resistor (consisting of 5, 5', etc.) of the guide line, 19 is an information signal transmitting device, It is composed of 3, 4, 10, and 11 in the figure.
With two information inputs i,, j2, . . . , control is performed to close any one of the switches 12 in the information signal transmitter 10.

Now, when a mobile object moves on a running road, it is equipped with an information signal receiving device consisting of 6 to 9 in FIG.
If we connect it to the guiding wire and move it, we get CSo, CS, .
The mobile object can detect the oscillation frequency corresponding to the two information inputs for each section of . Since this detection is performed continuously, the information can be changed at any time using the information input 20'. Note that in the above explanation, the information signal transmitting circuit 10 is provided on the ground station side, and the information signal receiving circuit 9 is provided on the mobile body side, but conversely, information is provided at both ends of the coupling loop coil on the mobile body side. A roof that connects a series circuit of a signal sending circuit 0 and an amplifier 11, and has coupling transformers 3, 4 and an amplifier 8 at the ends of the guide wires of each section on the ground station side.

It is also obvious that information on a moving object can be detected by connecting the circuits and connecting the information signal receiving circuit 9 so as to detect the oscillation frequency as in FIG. As explained in detail above, the present invention extends a guide wire as shown in FIG. By installing an information bond sending device on one side and an information signal receiving device on the other, it is possible to transmit information signals at any point in the required section at any time. Transmission of control signals or mobile information signals can be carried out at low cost.In particular, the circuit on the information sending side is simple, inexpensive, and highly reliable.

In particular, the above configuration can be used for automatic driving control of vehicles using rubber tire wheels, and can be used to control multiple vehicles individually from a centralized automatic control device at a ground station, or to detect the position of a moving object for automatic control. It is extremely advantageous in practice to be able to collect mobile object information at low cost and with high reliability.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the principle of construction of the guiding wire and coupling loop coil used in the present invention, Figure 2 is a diagram showing an example of the configuration of the device of the present invention, and Figure 3 is the guiding wire laid along the running route and the information bond sending device. FIG. 1, 1', 2... Induction wire, 3, 4... Transformer, 5, 5', 18... Termination resistor, 6, 7... Loop coil, 8, 11... ... Amplifier, 9 ... Information signal receiving circuit, 10 ... Information signal sending circuit, 1
2(12-1~121n)...Switch, 13(13-
1 to 13-n)...High Q resonator or resonant circuit, 1
4 (14-1 to 14-1n)... Phase shifter, I5 (
15-1 to 15-n)...BPF, 16 (16
-1~161n)...Amplifier, 17 (17-1
~17-n)...Signal detector, 19...
- Information signal sending device, 20... Information input. Outside 1 figure, 2 figures, juice 5 figures

Claims (1)

[Scope of Claims] 1. As an information signal transmission device between a moving body moving on a fixed travel route and a ground fixed station, it is installed along the travel route for each required section of the travel route, and one end is balanced with a terminating resistor, etc. A parallel three-wire induction wire terminated in the same plane, a first transformer provided at the other end of the induction wire and having both ends of the primary coil connected to two outer wires of the three parallel wires, and A second transformer with a primary coil connected between the other end of the induction wire and the midpoint tap of the first transformer primary coil;
It consists of a series circuit consisting of an information signal transmitter connected between the next coils and an amplifier for its output. High Q for a defined frequency corresponding to
Ground fixed station equipment in which resonant circuits and series circuits of phase shifters are installed in parallel according to the number of information, and there is almost no coupling with each other, and each is coupled only to the three wires of the above-mentioned parallel three-wire guide wire and the two outer wires. A series circuit consisting of two antenna coils, an amplifier connected to the input side and the output side, a bandpass filter for extracting the above specific frequency components according to information from the output of the amplifier, and an amplification detector for the output is made into one. Mobile station equipment each consisting of information signal detection circuits connected in parallel, and ground fixed station equipment including amplifiers and antenna coils of the mobile station equipment, and guide wires respectively coupled to these antenna coils. The feedback loop oscillation circuit is set to oscillate at an oscillation frequency determined by the resonance frequency of the high Q resonance circuit connected to the switch of the information signal transmission circuit, and transmits information from the terrestrial fixed station to the mobile station. An information signal transmission device characterized by: 2. As an information signal transmission device between a mobile object moving on a fixed travel route and a ground fixed station, a parallel three-wire balanced guide line in the same plane is installed along the travel route for each required section of the travel route;
A first transformer provided at one end of the guide wire and having two outer wires of the three parallel wires connected to both ends of the primary coil, one end of the center guide wire, and a primary coil of the first transformer. a second transformer having a primary coil connected between the center taps of the transformer;
, a signal amplifier with a second transformer secondary coil connected to its input and output, a bandpass filter that extracts frequency components determined for each piece of information from the output of this amplifier, and amplification and detection of the output. ground fixed station equipment equipped with an information signal detection circuit consisting of a parallel connection of series circuits, and two ground station equipment equipped with an information signal detection circuit consisting of a parallel connection of series circuits, and two It is composed of a series circuit of an antenna coil, an information signal transmitter connected therebetween, and its output amplifier, and the information signal transmitter circuit includes a switch that is opened and closed by the control input of the mobile station for each information. Each mobile station equipment is provided with a high-Q resonance circuit for a frequency set for each information and a series circuit of phase shifters in parallel for the number of information, and the mobile station equipment and the fixed station are connected through the coupling of the antenna coil and the induction wire. The feedback loop oscillation circuit configured in the equipment is set to oscillate at an oscillation frequency determined by the resonant frequency of the high-Q resonant circuit connected to the switch, and transmits information from the mobile station to the terrestrial fixed station. Information signal transmission equipment.