JP2984825B2 - Vehicle information transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle information transmitting apparatus for transmitting fixed or variable ground information to a vehicle.

[0002]

2. Description of the Related Art When transmitting ground information to a vehicle, particularly a railway vehicle, a vehicle upper arm is provided on the railway vehicle and a ground arm is provided on the ground side, and the vehicle upper arm and the ground arm are electromagnetically coupled.
Information is exchanged between the vehicle child and the ground child that are electromagnetically coupled.

[0003] The information transmission system by electromagnetic coupling between the vehicle upper child and the ground child has an advantage that accurate information can be transmitted because the range of the electromagnetic coupling is limited. Since the length of the electromagnetic coupling period varies depending on the speed of the vehicle, the information transmission time for executing accurate information transmission is always set short regardless of the speed of the vehicle. Therefore, the amount of information to be transmitted is restricted, and the amount of information is limited to a relatively small amount.

By the way, in order to solve the above-mentioned problem,
There is a technique disclosed in Japanese Utility Model Publication No. 7-48434.

[0005] In the above-mentioned technique, a plurality of ground terminals are installed in a row along the track of a railway vehicle on the ground side, and the amount of information to be transmitted is increased by increasing the number of ground terminals installed. Was something.

[0006]

However, in the above-described technique, in order to increase the amount of information, it is necessary to increase the number of ground elements, and there is a problem that equipment costs rise.

Further, since the transmission data is output from the vehicle upper child side for each ground child, a memory for storing the transmission data to be output to each ground child is required, and the transmission data read from the memory is switched. Not only has the problem of complicating the configuration of the on-board equipment mounted on the railway vehicle, but also its components consume power, and the power consumption is low. There was a problem that it would increase.

Also, on the ground side, it is necessary to maintain a state in which a plurality of ground sides can be electromagnetically coupled to transmit information, and therefore, there is a problem that power supply equipment having a relatively large capacity is required.

As described above, the technique disclosed in Japanese Utility Model Publication No. 7-48434 consumes a relatively large amount of power, but there is room for improvement in reducing the power consumption rate. Is left.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle information transmission apparatus which consumes less power, can be used for a long time by using a storage battery such as a lithium battery, and can transmit a relatively large amount of information. To provide.

[0011]

In order to achieve the above object, a vehicle information transmitting apparatus according to the present invention comprises an on-board device and a ground device, and transmits ground information to a vehicle. , on-board device includes a transmitter, a pickup coil, a receiving unit, a display unit, mounted on a vehicle, the transmitter is caused Duasyn No. of Ru to activate the power supply unit provided in the ground apparatus
The on- vehicle element is electromagnetically coupled to the on-ground element of the ground equipment, and transmits the starting signal from the transmitter to the on-ground element. To receive the radio waves of ground information transmitted to
The display device is for displaying on the vehicle ground information propagated by the radio wave received by the receiving unit, the ground device includes a ground unit, a power unit, and a transmitting unit, and is installed on the ground, The ground child receives the start signal from the vehicle child side and sends it to the power supply.
The power unit outputs the trigger pulse .
Switch switching signal output based on the trigger pulse
And powers the power supply circuit of the ground equipment
The transmission unit receives power supply from the power supply unit.
It starts up, modulates ground information, and radiates its radio waves into space. The upper armature of the onboard equipment and the upper armature of the ground equipment are electromagnetically coupled, and the power supply section of the ground equipment is electromagnetically coupled. by
Only for a predetermined period, power is supplied to the transmitting unit, and the receiving unit of the on-board device and the transmitting unit of the terrestrial device perform electric field coupling and transmit and receive ground information within the power supply time zone and the communication circuit.
This increases the time for which the road is formed .

The on-vehicle device and the terrestrial device each have a code converter, and the terrestrial information is composed of a plurality of fixed or variable information. The ground information is converted into serial ground information, and the code converter of the on-vehicle device reconverts the converted serial ground information into parallel ground information.

[0013]

The display unit decodes a signal received from a receiving unit and displays ground information as visible data.

The power supply section includes a mono-multi vibrator, a switch, and a power supply. The mono-multi vibrator operates by receiving the trigger pulse as an input and outputs a switching signal for opening / closing control of the switch. The switch closes or opens a power supply circuit based on a switching signal from the mono-multi vibrator, and the power supply is a storage battery and supplies power to the closed power supply circuit.

[0016]

The construction of the electromagnetic coupling between the upper and lower vehicle units has the characteristics that the coupling range is limited, so that accurate information can be transmitted and that the coupling time is short. I have.

[0017] The above-described problem arises because the above-described configuration based on the electromagnetic coupling between the vehicle upper child and the ground child is used for information transmission.

Therefore, in the present invention, ON / OFF control of the power supply unit is performed using the configuration based on the electromagnetic coupling. In this case, the ON state of the power supply unit is limited to a predetermined period due to electromagnetic coupling, so that the power consumption period is shortened, and the amount of power consumption can be reduced.

Even when the power supply unit of the ground equipment is turned off, power is consumed for backing up. However, this power consumption is insignificant and the power consumption does not matter.

Further, the start signal of the power supply unit is transmitted from the transmitter of the on-board device, but the start signal may be a trigger pulse.

On the other hand, if the period during which the power supply unit is turned on is shortened, there arises a problem that the time for transmitting information is shortened accordingly.

Therefore, according to the present invention, the receiving section of the onboard apparatus and the transmitting section of the ground apparatus are electric-field-coupled to each other, and the area for transmitting and receiving information is enlarged by radiating radio waves so that the area between the receiving section and the transmitting section is increased. The time for forming a communication circuit is extended, and a large amount of information is transmitted between a receiving unit and a transmitting unit.

[0023] In the information transmission by electromagnetic coupling board coil and the ground coil is the maximum speed of the train as 130 km / h, although the transmission time was 10 m sec, in the present invention, transmission
When the reach is 30 m using a weak electric field due to electric field coupling between the unit and the receiving unit , the transmission time is 820.
msec, and the time required for transmitting a large amount of information could be secured. Here, the weak electric field refers to a case where an output of 3 m / 500 μV, which is not symmetrical with the Radio Law, is used.

Further, on the ground equipment side, the individual parallel information is linked and converted into serial data, and on the on-board equipment side, the serial data is reconverted into parallel data to extract a plurality of ground information. It was done.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention.

In the figure, a vehicle information transmission device according to one embodiment of the present invention is basically intended for a vehicle information transmission device having an on-board device 1 and a ground device 2 for transmitting information to a vehicle. Is what you do.

The on-vehicle device 1 is mounted on a vehicle such as a railway vehicle or an automobile, and includes a transmitter 7, an upper child 8, a receiver 3, and a display 6. .

The transmitter 7 outputs a start signal for starting the power supply unit 10 of the ground apparatus 2, and uses a trigger pulse P as the start signal. In addition, car child 8
Is electromagnetically coupled to the ground terminal 9 of the ground device 2 to transmit a start signal from the transmitter 7 to the ground terminal side.

The receiving section 3 includes a receiving antenna 4a and a receiver 4
b, and is electric-field-coupled to the transmission unit 17 of the ground apparatus 2,
The radio wave radiated from the transmitting unit 17 and propagated in the space is received.

The display 6 displays terrestrial information 15 propagated by radio waves received by the receiving unit 3.
Since the transmitted ground information 15 is a hexadecimal digital signal, the display 6 decodes the hexadecimal digital signal 15 and demodulates it into an analog signal, which is displayed on the display screen as visible data. You may make it. In the present invention, since the information transmission time is extended, the ground information 15 may be displayed as visible data.

On the other hand, the ground device 2 is installed in the track in the case of a railway vehicle, and is installed in the road in the case of a vehicle such as an automobile. ,
And a transmission unit 17.

The ground arm 9 is electromagnetically coupled to the vehicle arm 8 and receives an activation signal from the vehicle arm. The ground element 9 and the vehicle element 8 each have a resonance circuit including a coil and a capacitor, and a start signal is transmitted and received when the resonance circuit of the ground element 9 and the vehicle element 8 resonates.

The power supply unit 10 supplies power to the power supply circuit of the ground equipment 2 by using the start signal received by the ground terminal 9 as an input. The power supply unit 10 is connected to the ground via the amplifier 13 and the diode 11a. It includes a monomultivibrator 11 b activated by a trigger pulse from the child 9, a switch 14, and a power supply 12.

The mono-multi vibrator 11a operates by receiving a trigger pulse as an input and outputs a switching signal for controlling the opening and closing of the switch 14 to the switch 14. The switch 14 closes (ON) or opens (OFF) the power supply circuit of the ground apparatus 2 based on a switching signal from the mono-multi vibrator 11a. The power supply 12 is, for example, a storage battery such as a lithium battery, and supplies power to the power supply circuit of the closed ground device 2.

The transmitting section 17 is electric-field-coupled to the receiving section 3, modulates the terrestrial information 15 transmitted to the vehicle side, and radiates the radio waves of the terrestrial information 15 into space, and includes a modulator 18a, an oscillator 18b, It has an amplifier 19 and a transmission antenna 20.

Further, the on-vehicle device 1 and the ground device 2 have code converters 5 and 6, respectively. The transcoder 16 of the ground device 2 converts a plurality of parallel ground information 15 into serial ground information 15 connected in series. The transcoder 5 of the on-board device 1 converts the converted serial information. Is converted again into a plurality of ground information 15 in parallel.

The ground information 15 includes various information necessary for the operation of the vehicle, such as the state of the railway track or road ahead of the position where the ground device 2 is installed, the display state of the traffic light, and the like. The terrestrial information 15 may be fixed information to be transmitted or information to be transmitted being changed from time to time, and is composed of a plurality of pieces of information, and is stored in a nonvolatile memory or the like. Provided as needed at any time.

In the embodiment, when the ground apparatus 2 is in a standby state, the amplifier 13 and the mono multivibrator 11b
Are backed up by receiving power supply from the power supply 12. This backup voltage is very small,
The power consumption is low and the current value is 6μ
A.

On the other hand, in the on-board device 1, the trigger pulse is periodically transmitted from the transmitter 7, and the current value is
It has become very small.

When the ground unit 2 is in a standby state, the transmission unit 17 and the code converter 16 of the ground unit 2 have the switch 1
Since the contact No. 4 is open, power is not supplied from the power supply 12, the power supply 12 is stopped, and the power of the power supply 12 is not consumed.

In a state where the ground equipment 2 is in a standby state,
When the vehicle passes over the ground device 2, the vehicle arm 8 of the vehicle device 1 and the ground member 9 of the ground device 2 are electromagnetically coupled,
The trigger pulse from the transmitter 7 is transmitted from the upper child 8 to the lower child 9
To enter.

This trigger pulse is amplified by the amplifier 13 and input to the mono-multivibrator 11b via the diode 11a.

When a trigger pulse is input, the mono-multi vibrator 11b outputs a switch signal for closing the contact of the switch 14 to the switch 14.

When the switch 14 receives the switching signal from the mono-multi vibrator 11b, the switch 14 closes its contact.
As a result, the power supply circuit of the ground equipment 2 is closed, and the power supply 1
Reference numeral 2 denotes a power converter, a modulator 18a, an oscillator 1
8b, supply to the power amplifier 19.

The code converter 1 receives electric power from the power supply 12.
6. When the modulator 18a, the oscillator 18b, and the power amplifier 19 are started, first, a plurality of parallel ground information 15 is input to the code converter 16, and is converted from parallel data to serial data.

The modulator 18a FM-modulates the ground information 15 converted into serial data with a signal from the oscillator 18b, and outputs this to the power amplifier 19.

The power amplifier 19 power-amplifies the transmission radio wave from the modulator 18a and radiates it from the transmission antenna 20 to space.

In this case, the transmitting unit 17 is activated by receiving the electric power from the power supply 12, is electrically coupled to the receiving unit 3 of the on-board device 1, and has a spatial communication path between the transmitting antenna 20 and the receiving antenna 4a. Are formed.

Therefore, the ground information 15 is received by the receiver 4b via the receiving antenna 4a, and the ground information 15 as serial data is converted again by the code converter 5 into parallel data.

The display 6 displays the ground information of the parallel data as visible data on a display screen. The driver of the vehicle drives the vehicle while viewing the contents displayed on the display.

As described above, in the present embodiment, the configuration based on the electromagnetic coupling between the vehicle upper child and the ground child is used, and the O
N, OFF control is performed, and the ON state of the power supply unit is limited to a predetermined period due to electromagnetic coupling, the power consumption period is shortened, and the power consumption is reduced.

On the other hand, if the period during which the power supply unit is turned on is shortened, there is a problem that the time for transmitting information is shortened accordingly. Since the area for transmitting and receiving information is expanded by radiating radio waves by coupling electric fields between the transmitter and the transmitter of the ground equipment, the time for which a communication circuit is formed between the receiver and the transmitter is expanded. A large amount of information can be transmitted between the upper device and the ground device.

Further, the individual parallel information is linked and converted into serial data on the ground equipment side, and the serial data is reconverted into parallel data on the on-board equipment side to extract a plurality of ground information. It was done. This makes it possible to transmit a plurality of types of information at the same time.

[0054]

As described above, according to the present invention, the power supply unit can be turned on and off by using the electromagnetic coupling between the vehicle upper and the ground.
OFF control is performed, and the power supply unit is turned ON.
The state is limited to a predetermined period due to electromagnetic coupling, the power consumption period can be shortened, and the power consumption can be reduced.

Even when the power supply unit of the ground equipment is turned off, power is consumed for backing up. However, the current flowing through the power supply unit at the time of backup is insignificant. It will not be.

Further, the start signal of the power supply unit is transmitted from the transmitter of the on-board device. Since the start signal may be a trigger pulse, it is sufficient that a weak current flows through the transmitter, and the consumption amount is small. There is no problem.

On the other hand, if the period during which the power supply unit is turned on is shortened, there is a problem that the time for transmitting information is shortened. However, in the present invention, the receiving unit of the on-board device is used. By transmitting electric waves between the transmitter and the transmitting unit of the ground apparatus and radiating radio waves, the area for transmitting and receiving information can be expanded to extend the transmission time, and a large amount of information can be transmitted. Along with this, the ground information can be displayed as visible data, and the information can be transmitted more accurately.

Further, the individual parallel information is linked and converted into serial data on the ground device side, and the serial data is reconverted into parallel data on the on-board device side to extract a plurality of ground information. Therefore, a plurality of types of information can be transmitted at the same time, and a large amount of information can be transmitted at the same time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 On-board device 2 Ground device 3 Receiving part 5, 16 Code converter 6 Display 7 Transmitter 8 Car child 9 Ground child 10 Power supply part 11b Mono multivibrator 12 Power supply 14 Switch 17 Transmission part

Claims (4)

(57) [Claims] 1. A vehicle information transmission device having a vehicle device and a ground device for transmitting ground information to a vehicle, wherein the vehicle device includes a transmitter, a vehicle child, a receiver, a display, wherein the door is mounted in a vehicle, the transmitter is provided with a ground device
To output the result and the power supply unit caused No. Duasyn which Ru is activated, and
The vehicle upper part is electromagnetically coupled to the ground part of the ground equipment and transmits the starting signal from the transmitter to the ground side. The receiving part is the radio wave of ground information radiated from the transmitting part and propagated to the space. The display unit displays on the vehicle ground information propagated by the radio wave received by the receiving unit. The ground device includes a ground unit, a power supply unit, and a transmitting unit. Including, installed on the ground, the ground child receives the start signal from the vehicle upper child side,
The power supply unit outputs the trigger pulse based on the trigger pulse.
It is operated by the switch signal of the
The transmission unit is activated by receiving the supply of power from the power supply unit , modulates terrestrial information and radiates the radio wave to the space, and a transmitter of the on-board device. And the grounding device of the ground equipment are electromagnetically coupled, and the power supply unit of the ground equipment is
As long as the power is supplied to the transmitter, the receiver of the onboard device and the transmitter of the ground device
In areas where ground information is exchanged during power supply hours.
A vehicle information transmission device for extending the time for forming a communication circuit . 2. The on-vehicle device and the terrestrial device each have a code converter, and the terrestrial information is composed of a plurality of fixed or variable information. The ground information is converted into serial ground information, and the code converter of the on-board device reconverts the converted serial ground information into parallel ground information. Item 4. The vehicle information transmission device according to Item 1. 3. The vehicle information transmitting apparatus according to claim 1, wherein the display decodes a signal received from a receiving unit and displays ground information as visible data. 4. The power supply section includes a mono-multi vibrator, a switch, and a power supply. The mono-multi vibrator operates by using the trigger pulse as an input and outputs a switch signal for opening / closing control of the switch to the switch. The switch is for closing or opening the power supply circuit based on a switching signal from the mono-multi vibrator, and the power supply is a storage battery and supplies power to the closed power supply circuit. The vehicle information transmission device according to claim 1 , wherein: