JP3301519B2 - On-board device and vehicle control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-board device for detecting a specific point on the ground side above a vehicle, and a vehicle control device having the on-board device.

[0002]

2. Description of the Related Art As a conventional vehicle control device, for example, an automatic train stop device (hereinafter, referred to as an "ATS device"), a device relating to a variable speed system is best known. Variable ATS
The device always oscillates at a certain constant oscillation frequency fo, and utilizes a frequency variation phenomenon in which the constant oscillation frequency fo is changed to the resonance frequency of the ground child when the vehicle child is coupled to the ground child. Control the vehicle speed. Such an ATS device is a general introduction of electricity for railway engineers, a signal series No. 7, "AT
S. ATC "(published by Japan Railway Electric Technology Association), page 6-
It is described in detail on page 19 and is well known.

There is a case where it is desired to obtain a point output indicating a running position of a vehicle as information for executing precise vehicle control. However, the above-mentioned conventional ATS device has no point output. As a means to obtain the point output, the
Means may be considered that utilizes the characteristics of the TS device to determine a combined ground child from the frequency-converted frequency and to detect the traveling position of the vehicle from the determined position of the ground child.

[0004] According to this method, R having a frequency change action is used.
In the case of the (red) presentation and the Y (yellow) presentation, the traveling position of the vehicle can be detected from the position of the combined ground child. However, in the case of the G display, the same resonance frequency as the oscillation frequency is always assigned to the G display, and the frequency change (frequency change) does not occur even when the vehicle child and the ground child are coupled. Even if such a method is adopted, the point cannot be detected.

[0005] As a means for detecting a point in the G display, a method of making the oscillation frequency always different from the resonance frequency of the G display can be considered. However, in this case, it is necessary to set a new constant oscillation frequency, and it is necessary to add a circuit therefor, and the newly set constant oscillation frequency does not adversely affect other signal devices. It is necessary to verify that the system operates stably at the newly set constant oscillation frequency, and so on. It is not easy to do.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide an on-vehicle device capable of detecting a traveling point without reducing the amount of control information.

Another object of the present invention is to provide an on-vehicle device capable of detecting a point even in a G display to which the same resonance frequency as the constant oscillation frequency is assigned without changing the constant oscillation frequency. To provide a vehicle control device.

[0008] Still another object of the present invention is to provide a vehicle control device capable of executing precise vehicle control.

[0009]

In order to solve the above-mentioned problems, an on-vehicle apparatus according to the present invention includes a plurality of amplifier circuits, an on-board element, and a level determination circuit. The amplifier circuits are cascaded to form a multi-stage amplifier circuit. The vehicle upper arm includes a pair of coils that are coupled to each other, the pair of coils is provided to face the ground side, and one of the coils is connected to an output side of the last-stage amplifier circuit of the multi-stage amplifier circuit. The other coil is connected to the input side of the first-stage amplifier circuit, and forms a feedback circuit for the multi-stage amplifier circuit. The multi-stage amplifier circuit and the vehicle body constitute an oscillation circuit that always oscillates at a predetermined oscillation frequency. The level determination circuit has an input side connected to an output side of an amplifier circuit located before the last-stage amplifier circuit, and outputs a point detection signal corresponding to an input signal.

As described above, the upper armature includes a pair of coils coupled to each other, one of which is connected to the output side of the last-stage amplifier circuit and the other coil is connected to the input side of the first-stage amplifier circuit. A feedback circuit is connected to the multi-stage amplifier circuit that is connected and includes a plurality of amplifier circuits. The plurality of amplifier circuits and the vehicle body constitute an oscillation circuit that always oscillates at a predetermined oscillation frequency. According to this configuration, at the time of the constant oscillation operation in which the vehicle upper arm is not coupled to the ground arm, the output voltage corresponding to the degree of coupling of the pair of coils is output from the amplifier circuit located before the last-stage amplifier circuit. Can be obtained.

[0011] The vehicle upper arm is provided with a pair of coils facing the ground side. For this reason, the pair of coils is also coupled to the grounding element provided on the ground side, and an output voltage corresponding to the degree of coupling with the grounding element is obtained from the amplifier circuit located before the last-stage amplifier circuit.

The level determination circuit is connected to the output side of the amplifier circuit located before the last-stage amplifier circuit, and outputs a point detection signal corresponding to the input signal. As described above, an output voltage corresponding to the degree of coupling between the vehicle child and the ground child is obtained from the amplifier circuit to which the level determination circuit is connected. The level determination circuit outputs a point detection signal corresponding to the signal input from the amplifier circuit. Thereby, a point detection signal corresponding to the ground child can be obtained.

[0013] This effect can be obtained similarly in the case of the G display, when the vehicle upper child is coupled to the ground child and constantly operates at the same resonance frequency as the oscillation frequency. Therefore, even in the G display to which the same resonance frequency as the constant oscillation frequency is assigned, the point detection signal can be obtained without changing the constant oscillation frequency.

A vehicle control device according to the present invention includes an on-board device and a ground device. The on-board device is constituted by the above-described on-board device according to the present invention. The ground device has a ground child coupled to the vehicle child of the vehicle device. This allows
Detailed vehicle control can be performed at each traveling point.

The other features of the present invention and the operation and effect thereof will be described in more detail with reference to the accompanying drawings.

[0016]

FIG. 1 is a block diagram showing the configuration of an on-board device according to the present invention. The on-board equipment shown is AT
The S device can be used as it is. The on-board device according to the present invention includes a plurality of amplifier circuits 11 to 14, an on-board child 2, and a level determination circuit 3. In the figure, reference numeral 8 is a ground child. The ground child 8 is provided at a specific point.

The amplifier circuits 11 to 14 are connected in cascade to form a multistage amplifier circuit. The amplifier circuits 11 to 14 can be configured using, for example, an operational amplifier (operational amplifier).

The upper armature 2 includes a pair of coils 21 and 22 that are connected to each other. The pair of coils 21 and 22 are provided to face the ground side. Of the pair of coils 21 and 22, the coil 21 is connected to the output side of the last-stage amplifier circuit 14, and the coil 22 is connected to the input side of the first-stage amplifier circuit 11, thereby providing a feedback circuit for the multi-stage amplifier circuit. Make up.

The amplifier circuits 11 to 14 and the vehicle body 2 constitute an oscillation circuit which always oscillates at a predetermined constant oscillation frequency fo. The constant oscillation frequency fo is, for example, “G present”.
It is set to 103 KHz corresponding to the information. The last-stage amplifier circuit 14 always outputs an oscillation signal S2 having an oscillation frequency fo.

The level judging circuit 3 is composed of the last stage amplifying circuit 1
Amplifying circuit, for example, the amplifying circuit 12 positioned before
, And outputs a point detection signal S1 in response to a change in the output of the amplifier circuit 12. The level determination circuit 3
For example, it is configured to include an amplifier circuit 31 and a Schmitt trigger circuit 32. The amplification circuit 31 is a buffer amplifier. The amplifier circuit 31 can be omitted when the output voltage Vo of the amplifier circuit 12 is sufficiently high and the Schmitt trigger circuit 32 does not affect the oscillation. The Schmitt trigger circuit 32 outputs the point detection signal S1 when the output voltage Vo becomes higher than a predetermined level.

As described above, the vehicle upper body 2 includes the pair of coils 21 and 22 that are connected to each other,
Is connected to the output side of the last-stage amplifier circuit 14, and the other coil 22 is connected to the input side of the first-stage amplifier circuit 11 to constitute a feedback circuit for the cascade-connected amplifier circuits 11 to 14. The amplifier circuits 11 to 14 and the upper armature 2 constitute an oscillation circuit that oscillates at a predetermined constant oscillation frequency fo.
According to this configuration, an output voltage Vo corresponding to the degree of coupling M between the pair of coils 21 and 22 can be obtained from the output terminals of the amplifier circuits 11 to 14 of each stage, for example, the amplifier circuit 12. This will be described more specifically with reference to FIG.

FIG. 2 is a diagram showing the relationship between the degree of coupling of the upper child and the output voltage of the amplifier circuit. In the figure, the horizontal axis indicates the degree of coupling between the pair of coils 21 and 22 constituting the vehicle upper body 2. The coupling degree M is indicated by the received voltage of the coil 22. The vertical axis indicates the output voltage Vo of the amplifier circuit 12. As shown in the figure, the output voltage Vo of the amplifier circuit 12 changes in proportion to the coupling degree M of the vehicle body 2.

The upper armature 2 is provided with a pair of coils 21 and 22 facing the ground side. For this reason, a pair of coils 2
When the terminals 1 and 22 are connected to the ground child 8 provided on the ground, the amplifier circuit 12 provides an output voltage Vo corresponding to the degree of coupling between the vehicle child 2 and the ground child 8. The grounding element 8 has a different resonance frequency depending on the location thereof, and when the vehicle element 2 is coupled to the grounding element 8, the oscillation frequency fo is always constant.
However, as described above, the frequency is changed to the resonance frequency of the coupled ground element 8.

The level determination circuit 3 is a final stage amplification circuit 1
4 and is connected to the output side of the amplifier circuit 12 located before the position detection signal S.
Outputs 1. As described above, the output voltage Vo corresponding to the degree of coupling between the vehicle upper child 2 and the ground child 8 is obtained from the amplifier circuit 12 to which the level determination circuit 3 is connected. The level determination circuit 3 outputs a point detection signal S1 corresponding to the signal Vo input from the amplifier circuit 12. Thus, a point detection signal S1 corresponding to the ground child 8 can be obtained.

This operation can be similarly obtained when the upper armature 2 is connected to the ground armature 8 and always operates at the same resonance frequency as the oscillation frequency fo. Therefore, G which is always assigned the same resonance frequency as the oscillation frequency fo
Also in the present example, the point detection signal S1 can be obtained without changing the oscillation frequency fo at all times. This means that it is not necessary to set a new constant oscillation frequency to obtain the point detection signal S1 in the G display.
This means that there is no need to add a circuit for this, and it is almost unnecessary to verify operation when applying to existing equipment. Therefore, the present invention can be easily implemented while using existing facilities.

Further, it is possible to reliably execute the point detection without being affected by rails, sleepers, and the like. This will be described in more detail with reference to FIG.

FIG. 3 is a diagram showing a change in the output voltage Vo of the amplifier circuit 12 when the type of the object to be detected is changed. In the figure, the horizontal axis represents the distance L1 between the vehicle upper child 2 and the object to be detected.
Is taken. The vertical axis indicates the output voltage Vo of the amplifier circuit 12.
Is taken. The characteristic Qo shows the output voltage characteristic with respect to the oscillation frequency at all times, the characteristic Q1 shows the output voltage characteristic when coupled with the ground element having the resonance frequency of 103 KHz, and the characteristic Q2 shows the output voltage characteristic when coupled with the iron plate. The grounding element includes a tuning coil and a capacitor, and the resonance frequency of both is set to 103 KHz. The distance L1 is set to 160 mm to 260 mm corresponding to a normal use state.

In the case of an iron plate, as shown by the characteristic Q2, an output voltage higher than the constant oscillation output characteristic Qo can be obtained. On the other hand, in the case of a ground element with a resonance frequency of 103 KHz,
As shown by the characteristic Q1, a higher output voltage can be obtained than in the case of an iron plate simulating a rail, a sleeper, or the like (characteristic Q2). Therefore, by setting the determination level Vk between the output voltage characteristic Q2 when the iron plate is connected and the output voltage characteristic Q1 when the ground connection is made, the ground connection can be reliably performed without being affected by rails, sleepers and the like. Can be detected.

Next, a more limited embodiment of the embodiment shown in FIG. 1 will be described.

The level determination circuit 3 includes a Schmitt trigger circuit 32 together with the amplification circuit 31. The Schmitt trigger circuit 32 outputs the point detection signal S1 when the output voltage Vo becomes higher than a predetermined level. here,
When the vehicle upper child 2 is coupled to the ground child 8, the output voltage Vo greatly changes as shown by the output characteristic Q1 in FIG. Therefore, the level determination by the Schmitt trigger circuit 32 is reliably performed, and the point detection is reliably performed.

The pair of coils 21 and 22 are loosely coupled. According to this configuration, the loose coupling between the pair of coils 21 and 22 can be affected by the coupling of the ground child 8. As is clear from the comparison between the output characteristics Qo and the output characteristics Q1 shown in FIG. 3, the coupling between the pair of coils 21 and 22 and the grounding element 8 is greater than the coupling between the pair of coils 21 and 22. Because of the close coupling, the degree of coupling of the entire vehicle upper element including the ground element 8 and the pair of coils 21 and 22 is governed by the coupling between the pair of coils 21 and 22 and the ground element 8. The overall degree of coupling is substantially higher. Thereby, a large change in the output voltage Vo can be obtained. Therefore, it is possible to reliably detect the ground child 8 and obtain a highly reliable point detection signal S1.

Further, the on-board device shown in FIG. 1 includes a filter circuit 4. The filter circuit 4 is provided on the input side of the multi-stage amplifier circuit and constantly passes a frequency signal in the frequency band of the oscillation frequency fo. The filter circuit 4 can be composed of a band-pass filter, a comb filter, or the like. According to this configuration, a stable oscillation signal S2 with a constant oscillation frequency fo can be obtained, and a highly reliable point detection signal S1 can be obtained.

The on-board device shown in FIG. 1 further includes at least two transformers 51 and 52. The transformer 51 is provided between the output side of the last-stage amplifier circuit 14 and one of the coils 21 of the vehicle upper body 2. The transformer 52 is provided between the other coil 22 of the upper armature 2 and the filter circuit 4. According to this configuration, the amplifier circuits 11 to 14 and the vehicle upper arm 2
And a stable oscillation signal S2 can be obtained.

Each of the amplifier circuits 11 to 14 is constituted by an operational amplifier (operational amplifier). According to this configuration, since the input impedance of each stage of the amplifier circuit can be increased and the output impedance can be decreased, a stable output voltage Vo can be obtained from the middle stage amplifier circuit 12.

An amplifying circuit located downstream of the amplifying circuit 12,
For example, the amplifier circuit 13 may have a voltage limiting function. According to this configuration, it is possible to obtain the oscillation signal S2 at a constant level and to obtain the output voltage Vo that changes linearly with the distance L1 between the vehicle upper child 2 and the ground child 8.

FIG. 4 is a circuit diagram showing a specific example of the on-board device. The illustrated on-board device can also be used as an ATS device as it is. In the figure, the same reference numerals as those in FIG. 1 indicate the same components. In FIG.
The illustration of the level determination circuit 3 shown in FIG. 1 is omitted.

The amplifier circuit 11 includes resistors R1 to R5, capacitors C1 to C3, and an operational amplifier IC1, and forms an inverting amplifier circuit.

The amplifier circuit 12 includes resistors R6 to R10, capacitors C4 to C6, and an operational amplifier IC2.
Construct an inverting amplifier circuit. The operational amplifier IC2 has an output terminal connected to the terminal 67 and outputs an output voltage Vo.

The amplifier circuit 13 includes resistors R11 to R17, capacitors C7 to C9, and an operational amplifier IC3.
Construct an inverting amplifier circuit. The amplifying circuit 13 is configured to limit the voltage when the voltage of the oscillation signal S2 becomes equal to or higher than the power supply voltage Vd1 as a result of the amplification.

The amplifier circuit 14 includes resistors R18 to R25, capacitors C10 to C12, and an operational amplifier IC4, and forms an inverting amplifier circuit.

The constants of the resistors R1 to R25 and the capacitors C1 to C12 are set so as to always oscillate at the oscillation frequency fo in combination with the filter circuit 4.

The power amplifying circuit PA amplifies the power of the oscillation signal S2 supplied from the amplifying circuit 14, and
The power-amplified oscillation signal S2 is supplied to one primary winding 511. The power amplifier circuit PA includes resistors R26 to R38, capacitors C13 to C18, transistors T1 to T5, and a diode D1.
It is comprised including. The power amplified oscillation signal S2 is
It is guided to the terminals 61 and 62 via the secondary winding 512 of the transformer 51. The secondary winding 512 of the transformer 51 has a resistor R51
Is connected. The terminals 61 and 62 are terminals to which one of the coils 21 (see FIG. 1) of the upper armature 2 is connected.

The terminals 64 and 65 are terminals to which the other coil 22 (see FIG. 1) of the upper armature 2 is connected. Terminal 6
4 and 65 are connected to the primary winding 521 of the transformer 52. The secondary winding 522 of the transformer 52 is connected via a resistor R40.
Connected to the input side of filter circuit 4. Filter circuit 4
Is set such that the center selection frequency always corresponds to the oscillation frequency fo. A resistor R41 is connected to the output side of the filter circuit 4, and the terminal voltage of the resistor R41 becomes the input voltage of the amplifier circuit 11.

The terminal 63 is connected to the secondary winding 512 of the transformer 51.
Connected to the midpoint of Terminal 63 and terminal 69 are connected to the 0V line. The terminal 68 is connected to the terminal 61.
The terminals 68 and 69 are terminals for monitoring the presence or absence of the oscillation signal S2.

The tertiary winding 513 of the transformer 51 includes a resistor R61.
And both ends of a series circuit of resistors R62 and R63. Both ends of the resistor R63 are connected to the input side of the bandpass filter 42. The center selection frequency of the band-pass filter 42 is always set in accordance with the oscillation frequency fo and the resonance frequencies f1 to fn. The output side of the band pass filter 42 is connected to terminals 71 and 72. As a result, the vehicle child 2 is coupled to the ground child 8, and the oscillation frequency fo is constantly changed to the ground child 8.
When the frequency is changed to the resonance frequency f1, the output of the band-pass filter 42 disappears, and the same ATS control information as that of the related art can be obtained.

The ATS control information includes a plurality of resonance frequencies f1 to
When given by fn, the center selection frequency of the bandpass filters 42 and 43 may be set to the resonance frequencies f1 to fn. Thereby, the conventional ATS
Similarly to the device, when the frequency of the oscillation signal S2 is changed to the resonance frequencies f1 to fn of the ground element 8, the frequencies f1 to fn are changed.
ATS control information corresponding to fn can be obtained.

The terminal 66 is connected to the primary winding 521 of the transformer 52.
Connected to the midpoint of The midpoint of primary winding 521 is connected to the 0V line. One end of the secondary winding 522 of the transformer 52 is connected to the 0V line.

FIG. 5 is a block diagram showing another embodiment of the on-board device according to the present invention and a vehicle control device in which the on-board device is combined with a ground device. In the figure, the same reference numerals as those in FIG. 1 indicate the same components. In the embodiment, the on-board device A has a control circuit 9. The control circuit 9 receives the point detection signal S1 and outputs a point control signal S3 at the point where the point detection signal S1 is obtained. For example, in a pendulum train, the point control signal S3 can be used as a control signal for limiting the speed of the pendulum train to a speed suitable for curve running and controlling the body of the pendulum train to a posture suitable for curve running. As a result, precise vehicle control can be performed at each traveling point.

The vehicle child 2 is a ground child 8 constituting a ground device.
Electromagnetically coupled with the tuning coil 81 of FIG. Therefore, the output voltage Vo changes linearly with the distance L1 (see FIG. 3).
And the determination level V of the Schmitt trigger circuit 32
Adjustment of k becomes easy.

The grounding element 8 includes a plurality of capacitors 821 to 82n
And a switching circuit 83. The switching circuit 83 connects one of the capacitors 821 to 82n and the tuning coil 81 in response to the control signal S5, and sets the resonance frequency f according to the combination.
Set 1 to fn. Amplifying circuits 11 to 14 and vehicle upper arm 2
Constitutes a variable-frequency oscillation circuit that constantly changes the oscillation frequency fo to the resonance frequencies f1 to fn of the grounding element 8 when the vehicle armature 2 is coupled to the grounding element 8. The output of the last-stage amplifier circuit 14 is led to an output terminal. Thereby, the conventional AT
Similarly to the S device, control information corresponding to the control signal S5 can be transmitted from the ground side to the vehicle upper side.

Amplifying circuit 1 located downstream of amplifying circuit 12
Reference numeral 4 has a voltage addition function, and receives a superimposed signal S6 corresponding to vehicle control information. The amplifier circuit 14 constantly adds the oscillation signal S2 and the superimposed signal S6 corresponding to the oscillation frequencies fo, f1 to fn, and outputs the sum. The superimposed signal S6 is always given as a frequency signal having a frequency different from the oscillation frequencies fo and f1 to fn. Thereby, in addition to the control information for the conventional ATS control, it is possible to transmit vehicle control information capable of enabling more advanced vehicle control.

The superimposed signal S6 is connected to the terminal 7 in FIG.
3, 74. The terminals 73 and 74 are connected to both ends of the resistor R71. Terminal 73 is connected to capacitors C71 and R72
And R73 to the negative input terminal of the operational amplifier IC4. The superimposed signal S6 is voltage-amplified by the amplifier circuit 14, power-amplified by the power amplifier circuit PA, and supplied to the primary winding 511 of the transformer 51. The input side of the bandpass filter 43 is connected to both ends of the resistor R63. The center selection frequency of the bandpass filter 43 is set in accordance with the frequencies of the superimposed signal S6 and the frequency-divided signals f1 to fn. The output side of the bandpass filter 43 is connected to terminals 75 and 76. Thus, vehicle control information can be obtained from the terminals 75 and 76.

[0053]

As described above, according to the present invention, the following effects can be obtained. (A) An on-board device capable of detecting a traveling point without reducing the amount of control information can be provided. (B) It is possible to provide an on-board device capable of detecting a point and a vehicle control device using the same even in a G display to which the same resonance frequency as the constant oscillation frequency is assigned without changing the constant oscillation frequency. (C) A vehicle control device capable of performing precise vehicle control can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an on-board device according to the present invention.

FIG. 2 is a diagram illustrating a relationship between a degree of coupling of a vehicle body and an output voltage of a middle-stage amplifier circuit.

FIG. 3 is a diagram illustrating a change in an output voltage of a middle-stage amplifier circuit when a type of a grounding element is changed.

FIG. 4 is a circuit diagram showing a specific example of an on-board device.

FIG. 5 is a block diagram showing a configuration of a vehicle control device according to the present invention.

[Explanation of symbols]

11-14 amplifying circuit 2 car body 21, 22 coil 3 level judgment circuit 8 ground element 9 control circuit fo oscillation frequency Vo middle stage amplifier circuit output S1 point detection signal S2 oscillation signal S3 point control signal

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B61L 3/12 B60L 15/40

Claims (12)

(57) [Claims] 1. An on-vehicle device including a plurality of amplifier circuits, a vehicle upper body, and a level determination circuit, wherein the amplifier circuits are cascaded to form a multi-stage amplifier circuit. The multi-stage amplifier includes a pair of coils coupled to each other, the pair of coils being provided so as to face the ground side, one of the coils being connected to the output side of the last-stage amplifier circuit of the multi-stage amplifier circuit, and Is connected to the input side of the first-stage amplifier circuit, thereby constituting a feedback circuit for the multi-stage amplifier circuit. The multi-stage amplifier circuit and the vehicle body always oscillate at a predetermined oscillation frequency. The level determination circuit has an input side connected to an output side of an amplifier circuit located before the last-stage amplifier circuit, and outputs a point detection signal in accordance with an input signal. On-board equipment. 2. The on-vehicle device according to claim 1, wherein the on-vehicle element has the pair of coils loosely coupled. 3. The on-vehicle device according to claim 1, further comprising a filter circuit, wherein the filter circuit is provided on an input side of the first-stage amplifier circuit, and includes a frequency band of the oscillation frequency. An on-board device that passes frequency signals. 4. The on-vehicle device according to claim 3, further comprising at least two transformers, wherein one of the transformers is an output side of the last-stage amplifier circuit and one of the on-vehicle element. An on-board device provided between one of the coils and another of the transformers is provided between the other coil of the on-board member and the filter circuit. 5. The on-vehicle device according to claim 1, wherein each of the amplifier circuits includes an operational amplifier. 6. The on-vehicle device according to claim 5, wherein the amplifying circuit located downstream of the amplifying circuit to which an input side of the level determination circuit is connected has a voltage limiting function. apparatus. 7. The on-vehicle device according to claim 1, further comprising a control circuit, wherein the control circuit receives the point detection signal and receives the point detection signal. A vehicle-mounted device that outputs a point control signal in the vehicle. 8. A vehicle control device including an on-vehicle device and a ground device, wherein the on-vehicle device is any one of claims 1 to 7, wherein the ground device is a vehicle control device. A vehicle control device having a ground child coupled to the vehicle child of the upper device. 9. The vehicle control device according to claim 8, wherein the ground child has a tuning coil that is electromagnetically coupled with the vehicle child. 10. The vehicle control device according to claim 9, wherein the grounding element includes a plurality of capacitors and a switching circuit, and the switching circuit is configured to switch one of the capacitors in response to a control signal. Connecting the tuning coil and setting a resonance frequency according to the combination, wherein the on-board device is configured such that, when the on-board element is coupled to the on-board element, the oscillation frequency is the resonance of the on-board element. A vehicle control device whose frequency is changed. 11. The vehicle control device according to claim 10, wherein the amplification circuit located downstream of the amplification circuit to which an input side of the level determination circuit is connected has a voltage addition function, A vehicle control device that receives a superimposed signal corresponding to vehicle control information, adds an oscillation signal corresponding to an oscillation frequency, and the superimposed signal, and outputs the added signal. 12. The vehicle control device according to claim 8, wherein the vehicle control device is used as an automatic train stop device.