JP2017200301A - Onboard communication device and vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an onboard communication device in which plural power wave signals having different frequencies can be produced by a pair of power wave producers and can be transmitted by one onboard piece.SOLUTION: Plural resonant circuits (14 and 15) associated with plural power waves having different frequencies are included in an onboard piece (1) that constitutes an onboard communication device. Switching is performed to select a resonant circuit which is adaptable for a frequency, according to a frequency switch command sent from an onboard transceiver (11). A power wave producer (111) incorporated in the onboard transceiver switches between power wave frequencies to select a power wave frequency to be produced, in response to a power wave frequency selection command. Thus, a pair of power wave producers (111) enable transmission of plural frequencies.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an on-vehicle communication device and a vehicle. For example, the present invention relates to an on-vehicle communication device having a function of switching a plurality of resonance circuits when a plurality of resonance circuits corresponding to a specific frequency are used in a railway vehicle for communication between the ground and the vehicle.

  As background art of this technical field, for example, there is Japanese Patent No. 3842142 (Patent Document 1). The gazette states that, in order to drive the non-powered ground unit, the transmission frequency of the power wave transmitted from the vehicle top unit to the non-powered ground unit using the transponder from the on-board unit of the train is switched on the on-board unit side. As an invention related to an on-vehicle transmission / reception device that switches to a different frequency depending on conditions and drives a non-powered ground element having a different frequency with one type of vehicle element, the “power wave transmission unit comprises two sets of power wave frequency oscillators and power A power amplifier and a power wave transmission switching circuit, wherein one power wave frequency oscillator generates a power wave having a frequency f1, and the other power wave frequency oscillator generates a power wave having a frequency f2 different from the frequency f1, When the frequency f 1 is selected under the power wave transmission frequency selection condition, the power wave amplifier of FIG. 1 amplifies the power wave of the frequency f 1 output from one power wave frequency oscillator to a specified level and outputs the other. Power of When the frequency f 2 is selected under the power wave transmission frequency selection condition, the wave amplifier amplifies the power wave of the frequency f 2 output from the other power wave frequency oscillator to a specified level and outputs the amplified power wave. The switching circuit switches the power wave of the frequency f1 and the power wave of the frequency f2 in accordance with the power wave transmission frequency selection condition and sends the power wave to the vehicle upper child, and the power wave transmission unit of the vehicle upper child has the resonance circuit and the frequency f2 of the frequency f1. And the resonance circuit switching unit, and the resonance circuit having the frequency f 1 forms a series resonance circuit with a coil formed by the maximum number of turns of the resonance capacitor and the power wave transmission antenna, and is higher than the frequency f 1. The resonance circuit of frequency f 2 forms a series resonance circuit with a coil having the number of turns formed by the resonance capacitor and the intermediate tap of the power wave transmission antenna, and the resonance circuit switching unit is in accordance with the power wave transmission frequency selection condition Has been described as switching the resonant circuit of the resonant circuit and the frequency f 2 of the frequency f 1 sends a power wave sent from the power-wave transmission section ".

Japanese Patent No. 3842142

  In Patent Document 1, the resonance circuit having the frequency f 1 of the vehicle upper part is a series resonance circuit composed of a resonance capacitor and a coil formed by the maximum number of turns of the power wave transmitting antenna, and a frequency f higher than the frequency f 1. The resonance circuit of 2 constitutes a series resonance circuit with a coil having the number of turns formed by a resonance capacitor and an intermediate tap of the power wave transmitting antenna, and the resonance circuit switching unit resonates at the frequency f 1 according to the power wave transmission frequency selection condition. It is described that the power wave sent from the power wave transmission unit is sent out by switching the circuit and the resonance circuit of frequency f 2.

  However, in the above configuration method of Patent Document 1, the number of turns of the power wave transmitting antenna changes between the frequency f1 transmission and the frequency f2 transmission. That is, the characteristics of the antenna change between the frequency f1 transmission and the frequency f2 transmission, and the relationship between the antenna current per antenna turn and the power amount of the power wave sent to the ground unit changes. If the transmission level is adjusted by monitoring the antenna transmission current, the transmission level can be adjusted easily because the target current varies between f1 transmission and f2 transmission and transmission level adjustment becomes difficult. There is a problem to want to.

  Further, in Patent Document 1, the power wave transmission unit has two sets of power wave frequency oscillators, a power wave amplifier, and a power wave transmission switching circuit. Which output is selected depends on the power wave transmission frequency selection condition. It is described that it depends on. That is, one of the two sets of the power wave frequency oscillator and the power wave amplifier, which is actually connected to the vehicle upper unit and functioning, is one, and the other is not functioning. Therefore, in the above configuration, the total operating rate of the two sets of circuits is 0.5, and the mounted circuit cannot function efficiently. In addition, since two mounting areas are required, a mounting area twice as large as that of the conventional configuration in which power wave frequency switching is not performed is required.

  Therefore, in the present invention, it is possible to switch a plurality of resonance circuits corresponding to a plurality of power waves having different frequencies without changing the number of antenna turns of the power wave transmitting antenna between the transmission of the power wave frequency f1 and the transmission of the frequency f2. A vehicle communication device is provided.

  Further, in the present invention, two sets of power wave frequency oscillators, power wave amplifiers, and power wave transmission switching circuits are required by switching the transmission frequency of the power wave frequency oscillator between the transmission of the power wave transmission frequency f1 and the transmission of the frequency f2. Instead, there is provided an on-vehicle communication device that enables transmission of a plurality of power waves having different frequencies by using only one set of a power wave frequency oscillator and a power wave amplifier.

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above-described problems. For example, an information wave transmitting / receiving antenna that transmits or receives train control information by wireless communication with a ground device arranged along a traveling path of a vehicle. And a power wave transmitting antenna that is a power wave for driving the ground element and is capable of transmitting a plurality of the power waves having different frequencies, and having a unique fixed number of turns,
A plurality of resonant capacitors connected to the power wave transmitting antenna and resonating with each of the plurality of power waves having different frequencies, and selectively connecting and disconnecting the plurality of resonant capacitors and the power wave transmitting antenna And a switching command input for inputting an instruction to switch the resonance capacitor to the resonance circuit switching unit, and a switching command and information for the switching command input. An on-board transmitter / receiver for inputting / outputting an information wave signal to / from the wave transmitting / receiving antenna and outputting a power wave signal to the power wave transmitting antenna. A power wave is generated by a wave frequency oscillator and a power wave amplifier, and a power wave frequency output from the power wave generator and a switching command are input according to a command of the power wave frequency selector. It characterized a plurality of power waves the frequency by varying the switching command are different, to match the resonance frequency of the vehicle upper child against.

  According to the present invention, when transmitting power waves of a plurality of different transmission frequencies, it is not necessary to change the number of antenna turns even if the resonant circuit corresponding to the frequency is switched. Compared with this method, transmission level control can be easily performed. Since the number of antenna turns is a unique number of fixed turns, the structure of the antenna can be simplified and the apparatus cost can be reduced.

Furthermore, according to the present invention, it is possible to generate power waves having a plurality of different transmission frequencies with only one set of power wave frequency oscillators and power wave amplifiers. Therefore, the apparatus cost can be reduced.
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a figure explaining the structure of the on-vehicle communication apparatus shown by this invention. It is a block diagram which shows one Example about the structure of the train information control apparatus to which the on-vehicle communication apparatus shown by this invention is applied. It is a flowchart shown about the switching procedure of a resonance circuit in the on-vehicle communication apparatus shown by this invention. In the on-vehicle communication device shown in the present invention, it is a configuration diagram when a resonance circuit switching unit is configured inside an on-vehicle transceiver. FIG. 5 is a diagram for explaining a method of configuring a resonance circuit by connecting / disconnecting a resonance capacitor corresponding to a difference in resonance frequency in the on-vehicle communication device shown in the present invention. In the on-vehicle communication device shown in the present invention, when resonance frequency switching is performed using two sets of resonance circuits, it is a configuration diagram having a resonance circuit switching unit in the vehicle element. In the on-vehicle communication device shown in the present invention, when the resonance frequency is switched using two sets of resonance circuits, the power wave transmitting antenna is also used as a level monitor antenna. In the on-board communication device according to the present invention, when resonance frequency switching is performed using two sets of resonance circuits, the resonance circuit switching unit is included in the on-vehicle transceiver. In the on-vehicle communication apparatus shown in the present invention, it is a configuration diagram in which relay contacts are arranged at both ends of a resonance circuit capacitor.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing an embodiment of the on-board communication device of the present invention.

  In the figure, an on-vehicle transmitter / receiver 11 and an on-vehicle element 1 used in a transponder transmission / reception system are shown as an example of an on-vehicle communication device. The vehicle upper part 1 is composed of, for example, a resonance circuit switching unit 13, a power wave transmission antenna 15, an information wave transmission / reception antenna 16, and a resonance capacitor 14 that forms a series resonance circuit in combination with the power wave transmission antenna 15, (Vehicle connection cable) 12 is connected to the vehicle transceiver 11 via the vehicle.

  The on-board communication device in the present embodiment can be applied to, for example, an on-board child used in a transponder transmission / reception system, and is a railway safety system ATS-P (Automatic Train Stop-Pattern) using a transponder transmission / reception system or an automatic driving system. It can be applied to ATO (Automatic Train Operation), digital ATC (Automatic Train Control), and the like.

  Prior to detailed description of the configuration of FIG. 1, an example of an environment in which the on-board communication device of this embodiment is used will be described with reference to FIG.

  In the embodiment of FIG. 2, for example, a system that transmits and receives train control information, driving support information, and the like between the train 21 and the ground signal system using a transponder transmission / reception system is shown.

  As shown in FIG. 2, the vehicle upper element 1 mounted on the train 21 transmits / receives transmission / reception information from the vehicle transmitter / receiver 11 from the vehicle upper element 1 to the ground element 24 as electromagnetic waves, and is a ground element that is a ground side signal facility. 24 to communicate. In the case of a ground element called a non-powered ground element that does not have a power supply by itself, it is necessary to wirelessly supply power for driving the ground element 24 from the train 21. The power transmitted in is called a power wave. The power wave is an unmodulated signal having a constant frequency. The ground unit 24 rectifies after receiving this unmodulated power wave, activates the circuit in its own ground unit with the DC-converted power, and while the power wave is supplied from the train 21 and the circuit is activated ( That is, while the train is approaching the vicinity of the ground element, control information is transmitted from the ground element 24 to the vehicle upper element 1. This electromagnetic wave of control information is called an information wave. The control information is also transmitted from the vehicle.

  As described above, in order to activate the non-powered ground element, it is necessary to supply electric power from the train 21 via the vehicle upper element 1. The signal frequency of this electric wave differs depending on the section and the operator, There is a frequency. This is because, when a transponder transmission / reception system is introduced, the power wave frequency on the route is determined after considering frequencies that do not cause frequency interference with existing train radio and facilities along the line.

  Therefore, in order to drive a non-powered ground element in a train or the like that is interleaved with a plurality of routes, a certain section 1 needs to transmit the power wave frequency f1 as a power wave for driving the ground element 24. In a certain section 2, it is necessary to transmit the power wave frequency f2 as a power wave for driving the ground element 25.

  In order to transmit power waves efficiently, the power wave transmitting antenna 15 of the vehicle upper 1 forms an LC resonance circuit with L of the power wave transmitting antenna 15 and C of the capacitor, and the resonance frequency is set to one specific power wave frequency. Are combined. Therefore, when the power wave frequencies to be transmitted are different between the section 1 and the section 2, the section 1 dedicated vehicle upper arm having the resonance frequency of f1 of the section 1 and the section 2 dedicated vehicle upper arm having the resonance frequency f2 of the section 2 respectively. Therefore, it is assumed that a sufficient space for installing the vehicle upper cannot be secured. In the present embodiment, the configuration is such that the power wave of the f1 frequency and the power wave of the f2 frequency can be transmitted by one vehicle upper element 1.

  Returning to the description of FIG. 1, the on-board communication device of the present embodiment is composed of, for example, an on-board element 1, an on-board transmitter / receiver 11, an on-board element 1 and an on-board transmitter / receiver 11, The upper element 1 includes a resonance circuit switching unit 13, a resonance capacitor 14, a power wave transmission antenna 15, and an information wave transmission / reception antenna 16. The resonance circuit switching unit 13 includes a switch and a relay contact 131 for switching the resonance capacitor 14, The relay coil 132 is connected to a switching command input 133 for operating a switch and a relay contact 131, and the resonance capacitor 14 is for a frequency f1 for taking LC resonance with a plurality of different power wave frequencies. The capacitor “C1” 141 and the capacitor “C2” 142 for frequency f2 are provided.

  The on-vehicle transmitter / receiver 11 outputs a resonance circuit switching command to the resonance circuit switching unit 13 via the switching command input 133, an information wave signal input / output to the information wave transmitting / receiving antenna 16, and a power wave to the power wave transmitting antenna 15. Output the signal. A power wave generation unit 111 that outputs a power wave signal to the power wave transmission circuit of the on-vehicle transmitter / receiver 11, and a power wave that selects a power wave frequency to be transmitted and outputs a resonance circuit switching signal to the resonance circuit switching unit 13 The power wave generation unit 111 includes at least a power wave frequency oscillator 112 for generating a power wave frequency and a power wave amplifier 113 for amplifying the power wave to a necessary level.

  The on-board element 1 and the on-board transmitter / receiver 11 are connected to each other by a lining wire 12. The outfitting line includes a power wave transmission line 121, an information wave transmission / reception line 122, and a resonance circuit switching command signal line 123.

  As for the information wave transmitting / receiving antenna 16 which is an antenna for transmitting / receiving data to / from the ground unit, the transmission / reception frequency does not change according to the section in the implementation configuration of FIG. Although the circuit switching unit 13 and the resonance capacitor 14 are not shown, when the information wave is also resonated, the resonance frequency can be switched by configuring the resonance circuit switching unit 13 and the resonance capacitor 14 as in the case of the power wave. is there.

The operation of the on-board communication device will be described with reference to the operation flow of FIG.
The power wave frequency selection unit 114 of the on-vehicle transmitter / receiver 11 selects which frequency f1 or f2 of the power wave is transmitted according to the line section or section (step 301). At this time, when the frequency to be transmitted is f2, the power wave frequency selection unit 114 stops applying the signal to the resonance circuit switching signal command line 123 (step 302). When the signal application to the resonance circuit switching signal command line 123 is stopped in step 302, the voltage application of the voltage 132 to the resonance circuit switching relay coil of the resonance circuit switching unit 13 is stopped, so that the relay coil is de-energized (step 303). . When the relay coil is de-energized, the resonance circuit switching relay contact 131 of the resonance circuit switching unit 13 is deactivated (step 304). As a result, the resonance capacitor “C2” 142 for the frequency f2 becomes the power wave transmitting antenna. 15 and the resonance capacitor “C1” 141 for the frequency f1 is disconnected from the power wave transmitting antenna 15 (step 305). Therefore, an LC series resonance circuit having a resonance frequency f2 is configured by the inductor L of the power wave transmitting antenna 15 and the capacitor C of the resonance capacitor “C2” 142 for f2, and the power wave is obtained by minimizing the transmission output impedance for the frequency f2. The power wave of frequency f2 is sent from the transmitting antenna 15 to the ground device by a necessary and sufficient amount of power. Finally, the power wave frequency selection unit 114 sets the frequency f2 in the power wave generation unit 111, and the on-board transmitter / receiver 11 inputs the power wave of the frequency f2 to the on-board child 1 (step 306). Thus, the power wave having the frequency f2 is transmitted from the power wave transmitting antenna 15 (step 307). Step 302 and subsequent steps may be performed after step 306 is performed first.

  When the travel line section or section changes and the frequency to be transmitted becomes f1, the power wave frequency selection unit 114 of the on-vehicle transceiver 11 applies a command signal to the resonance circuit switching signal command line 123 (step 308). Therefore, since the relay coil driving voltage is applied to the resonance circuit switching relay coil 132 of the resonance circuit switching unit 13, the relay coil is excited (step 309). When the relay coil is energized, the resonance circuit switching relay contact 131 of the resonance circuit switching unit 13 is activated (step 310). As a result, the resonance capacitor “C1” 141 for the frequency f1 is applied to the power wave transmitting antenna 15. The resonant capacitor “C2” 142 for the frequency f2 is connected and disconnected from the power wave transmitting antenna 15 (step 311). Therefore, an LC series resonance circuit having a resonance frequency f1 is configured by the inductor L of the power wave transmission antenna 15 and the capacitor C of the resonance capacitor “C1” 141 for f1, and the power wave is obtained by minimizing the transmission output impedance for the frequency f1. The power wave of frequency f1 is sent from the transmission antenna 15 to the ground device by a necessary and sufficient amount of power. Finally, the power wave frequency selection unit 114 sets the frequency f1 in the power wave generation unit 111, and the on-board transceiver 11 inputs the power wave of the frequency f1 to the on-board child 1 (step 312). Thus, the power wave having the frequency f1 is transmitted from the power wave transmitting antenna 15 (step 313). Note that step 308 and subsequent steps may be performed after step 312 is performed first.

  As described above, the embodiment in this embodiment is only switching of the LC resonance circuit, and the power wave transmitting antenna 15 uses the same antenna before and after switching. That is, the number of turns of the antenna and the L value do not change before and after switching of the LC resonance circuit. Therefore, when the f1 resonance capacitor “C1” 141 is connected to transmit a power wave having the frequency f1, and when the f2 resonance capacitor “C2” 142 is connected to transmit the power wave having the frequency f2. The characteristics of the power wave transmitting antenna 15 do not change. Only the resonance frequency will shift. Since there is no change in the number of antenna turns, the current value per antenna turn of the power wave transmitting antenna 15 when transmitting the required amount of power to the ground does not change before and after switching the resonance circuit, and the antenna current is monitored. Thus, when performing transmission level control and level drop failure detection, the target value and failure determination threshold value monitored before and after switching of the resonance circuit can be made the same.

  In addition, as shown in FIG. 1 of the present embodiment of the present invention, the power wave frequency selection unit 114 is supplied from a device outside the on-board transceiver as shown by the operation section switching SW (switch) 22 or the train control unit 23 in FIG. A transmission frequency selection command is output to the power wave frequency oscillator 112 according to the input power wave frequency selection condition, and a resonance circuit switching command signal is output to the relay coil 132 of the resonance circuit switching unit 13. The power wave frequency oscillator 112 includes a sine wave calculation element 115 that calculates a sine wave having an arbitrary frequency that matches the power wave frequency, and a DA converter 116 that outputs the calculated sine wave as an analog signal. It is composed of elements that can perform numerical operations, such as a microcomputer, CPU, DSP, and FPGA. The sine wave arithmetic element 115 and the DA converter 116 can also be configured by a DDS (Direct Digital Synthesizer).

  By switching the frequency of the sine wave generated by the sine wave computing element 115 in accordance with a command from the power wave frequency selection unit 114, an oscillator capable of outputting any of a plurality of frequencies can be configured, and the frequency f1 The frequency f2 can be output by one power wave frequency oscillator 112. The output from the oscillator is amplified by the power wave amplifier 113 to the power wave transmission level and then input to the LC series resonance circuit of the vehicle upper element 1 via the power wave transmission line 121. The output of the power wave amplifier 113 may be input to the vehicle upper 1 after removing noise with a filter as necessary.

  As described above, the frequency selection command of the power wave frequency selection unit 114 is input to the power wave frequency oscillator 112, and the power wave frequency oscillator 112 is configured so that a plurality of frequencies can be switched and output. The wave generator 111 can generate power waves having two different frequencies f1 and f2. Therefore, not only can the two sets of power wave frequency oscillators and power wave amplifiers disclosed in Patent Document 1 be reduced to a set of power wave frequency oscillators and power wave amplifiers, but also the power wave transmission switching circuit can be eliminated. The manufacturing cost can be reduced by reducing the mounting area and the mounting part.

  FIG. 4 is a configuration diagram in the case where the resonance circuit switching unit 13 is configured inside the on-vehicle transceiver 11 instead of inside the on-vehicle core 1 in the on-vehicle communication device shown in the present embodiment. As shown in FIG. 4, even if the resonance circuit switching unit 13 is configured inside the on-vehicle transmitter / receiver 11, the resonance capacitor 14 can be switched and there is no functional problem. In general, the interior of the vehicle upper body 1 has a structure that cannot be disassembled because it is resin-molded to prevent water and vibration. Therefore, when the resonance circuit switching unit 13 is configured inside the vehicle upper element 1, maintenance of a mechanical drive unit such as a relay becomes a problem. However, by configuring the resonance circuit switching unit 13 inside the vehicle transmitter / receiver 11, the machine It is possible to improve the maintainability of the automatic drive unit and increase the operation reliability.

  FIG. 5 is a diagram for explaining a method of configuring a resonance circuit by connecting / disconnecting a resonance capacitor corresponding to the difference in resonance frequency in the on-board communication device shown in this embodiment. Since the configuration of the information wave transmitting / receiving antenna 16 is the same as that of the first embodiment, the information wave transmitting / receiving antenna 16 is not shown. In the first embodiment, the resonance capacitor “C1” 141 for the frequency f1 and the resonance capacitor “C2” 142 for the frequency f2 are provided, and either one of the resonance capacitors 14 is set in the resonance circuit switching unit 13 according to the transmission frequency. The method of selecting and connecting to the power wave transmitting antenna 15 was shown.

  On the other hand, in the present embodiment, the vehicle upper element 1 includes a resonance circuit switching unit 51, a resonance capacitor 53, a power wave transmission antenna 15, and an information wave transmission / reception antenna 16 (not shown). It is composed of a switch / relay contact 52 for connecting “C3” 54 of the capacitor 53 and a relay coil for operating the switch / relay contact 52. The resonance capacitor 53 has two types of “C3” 54 and “C4” 55. The capacitor is provided. At this time, the capacity of “C4” 55 is a capacity constituting the resonance circuit at frequency f2, and the capacity of “C3” 54 is a capacity obtained by subtracting the capacity of “C4” 55 from the capacity constituting the resonance circuit at frequency f1. . The frequency is assumed to be f2> f1.

  At the time of frequency f2 transmission, “C4” 55 is connected to the power wave transmission antenna 15 by stopping application of the command signal to the relay coil, but the frequency f1 transmission is at “C4”. “C3” 54 is additionally connected to the power wave transmitting antenna 15 by applying a command signal to the relay coil without disconnecting 55 from the power wave transmitting antenna. At this time, by configuring so that “C3” 54 and “C4” 55 are connected in parallel, the capacitance of the capacitor connected to the power wave transmitting antenna becomes C3 + C4. By selecting C3 so that the capacitance of C3 + C4 becomes the resonant capacitance at the frequency f1, the resonant capacitor capacitance for the frequency f1 can be configured without having to separate “C4” 55 from the power wave transmission antenna 15. . When the method shown in this embodiment is used, the number of relay contacts 52 of the resonance circuit switching unit 51 used for switching the resonance circuit can be reduced compared to the first embodiment. Since the configuration of the power wave transmitting antenna 15 is the same as that of the first embodiment, the number of antenna turns and characteristics do not change between the frequency f1 transmission and the frequency f2.

  Of course, instead of using a normally open contact (a contact) as the relay contact 52, a normally closed contact (b contact) is used, so that the application of the command signal to the relay coil is stopped when “C1” 54 and “C2” are stopped. “55” may be connected to resonate with the frequency f1, and only “C2” 55 may be connected to resonate with the frequency f2 when a command signal is applied to the relay coil.

  In the embodiment shown in FIG. 6, the power wave transmitting antenna 15 is always connected to the frequency f1 resonant capacitor “C1” 141 and the frequency f2 resonant capacitor from the configuration of the embodiment shown in FIG. The power wave transmitting antenna B63 that is always connected to “C2” 142 is configured to use two antennas. Also in this embodiment, the information wave transmitting / receiving antenna is not shown. When the resonance circuit switching unit 61 selects the resonance capacitor “C1” 141 for f1, the power wave is transmitted using the power wave transmission antenna A62, and when the resonance capacitor “C2” 142 for f2 is selected, the power wave transmission antenna B63 is used. Send power waves.

  As in the configuration of the present embodiment, an on-vehicle communication device that supports a plurality of power wave transmissions with different frequencies can be realized even with a configuration including a plurality of power wave transmission antennas according to the power wave frequency to be transmitted.

  By providing a plurality of antennas, any antenna that is not used for power wave transmission can be used as a monitor antenna for monitoring the power wave transmission level.

  FIG. 7 is a configuration diagram in which the power wave transmission antenna is also used as the level monitor antenna in the on-board communication device shown in this embodiment. The power wave transmitting antenna B63, which is an antenna that is not used for power wave transmission at the time of frequency f1 transmission, is used as a monitor antenna for monitoring the output of the power wave transmission antenna A62, and the power is an antenna that is not used for power wave transmission at the time of frequency f2 transmission. The structure which uses wave transmission antenna A62 as a monitor antenna which monitors the output of power wave transmission antenna B63 is shown. For example, when transmitting the frequency f1, the power wave transmission line 121 is connected to the power wave transmission antenna A62 and is not connected to the power wave transmission antenna B63. On the other hand, the power wave transmission level monitor line is connected to power wave transmission antenna B63 during frequency f1 transmission, and is not connected to power wave transmission antenna A62. At this time, a part of the power wave having the frequency f1 transmitted from the power wave transmitting antenna A62 is received by the power wave transmitting antenna B63, and the reception level is fed back to the onboard transceiver 11 so that the onboard transmitter 11 Thus, the power wave transmission level from the power wave transmission antenna A62 can be monitored. In addition, by setting the termination resistor 73 of the power wave transmission level monitor line 72 to a high impedance connection, only a small amount of power necessary for transmission level monitoring is distributed to the power wave transmission level monitor line 72 and transmitted to the ground unit. The level can be monitored without damaging the power level of the power wave.

  Moreover, FIG. 8 is a block diagram which has the resonance circuit switching part 61 in a vehicle-mounted transceiver in a present Example. As in the second embodiment, the maintainability of the mechanical drive unit is improved and the operation reliability can be increased.

  In the present embodiment, the power wave transmission antenna A62 and the power wave transmission antenna B63 are antennas having the same number of turns, so that the antenna turns have a unique fixed number of turns that do not change before and after switching of the resonance circuit. The characteristics can be the same before and after switching the resonance circuit. However, it is of course possible to configure the power wave transmission antenna A62 and the power wave transmission antenna B63 with different numbers of turns.

  FIG. 9 is a configuration diagram in which relay contacts are arranged at both ends of the resonance circuit capacitor in the on-board communication device shown in the present embodiment. A relay contact (input side) 93 and a relay contact (output side) 94 are provided at both ends of the resonance capacitor. Both of these two relay contacts operate simultaneously by a resonance circuit switching command to the relay coil 92.

  By providing the relay contacts at both ends of the resonance capacitor, it is possible to disconnect the both ends of the capacitor that disconnects from the power wave transmission antenna 15 from the power wave transmission antenna 15 when switching the resonance circuit. In the configurations of the first to fourth embodiments, the configuration in which only one end of the capacitor is separated from the power wave transmitting antenna 15 is shown. However, in the first to fourth embodiments, connection and disconnection are performed at both ends as in the present embodiment. It is also possible to do.

  An application example of the on-board communication device having the configuration shown in the first to fifth embodiments will be described with reference to FIG.

  In section 1, in the on-vehicle transmitter / receiver 11, when the ground element 24 is a non-powered ground element, a power wave of frequency f1 is transmitted from the on-vehicle transmitter / receiver 11 as the power wave for driving the ground element 24. Send to. At this time, as shown in the first to fifth embodiments, an LC resonance circuit corresponding to the frequency f1 is selected from the vehicle upper 1, and a power wave having the frequency f1 is transmitted from the vehicle upper 1 to the ground.

As a method (condition) for the on-vehicle transmitter / receiver 11 to transmit the frequency f1, a method of taking the selected state of the driving section switching SW 22 (switch) provided in the cab or the like into the power wave frequency selecting unit 114 of the on-vehicle transmitter / receiver 11 A method of receiving frequency selection information from another device connected to the on-vehicle transceiver 11 by the power wave frequency selecting unit 114 of the on-vehicle transceiver 11 and selecting the frequency f1;
Data indicating the frequency of the power wave required in the section is stored in the ground unit 24 or the ground unit 25, and the power wave frequency selection is indicated in the communication information with the ground unit from the stored data. Bit information is provided, and the on-vehicle transmitter / receiver 11 self-estimates the travel section using a method of selecting the frequency f1 by the power wave frequency selection unit 114 from the information received from the ground unit, or using a pulse counter, etc. A method of selecting the frequency f1 by the eleven power wave frequency selection units 114 is conceivable. In the case of the method in which the frequency f1 is selected by the power wave frequency selection unit 114 from the information received from the ground unit, the power source ground unit that can receive the information from the ground unit without the need to activate the ground unit by the power wave In the communication information, bit information indicating power wave frequency selection is provided, and the on-vehicle transmitter / receiver 11 selects the frequency f1 by the power wave frequency selection unit 114 based on the information received from the ground unit 24, or enters section 1. Bit information indicating power wave frequency selection is provided in the communication information with the power source ground element activated at a power wave frequency other than f1 that has been transmitted before, and the on-vehicle transceiver 11 receives from the ground element 24 Either of the methods of selecting the frequency f1 by the power wave frequency selection unit 114 from the information can be implemented. Here, the other device connected to the on-vehicle transmitter / receiver 11 is, for example, the train control unit 23 including a security device such as ATC or ATS.

  When the train enters section 2, information for selecting f2 which is a power wave frequency corresponding to the non-powered ground element 25 used in section 2 by the method described above including operation section switching SW22 is transmitted and received on the vehicle. The on-vehicle transmitter / receiver 11 transmits a power wave having a frequency f2. At this time, the LC resonance circuit corresponding to the frequency f2 is selected from the vehicle upper 1 as shown in the first to fifth embodiments, and the power wave of the frequency f2 is transmitted from the vehicle upper to the ground.

  With the above configuration and method, even in a train traveling in a plurality of traveling sections having different power wave frequencies for driving the ground unit, power waves of a plurality of frequencies are transmitted according to the traveling section, and between the ground and the vehicle It is possible to perform communication with a single car upper.

  In the first to fifth embodiments, the switching of the power wave frequency in the transponder transmission / reception system and the switching of the resonance circuit according to the frequency have been described. Of course, the present invention transmits a plurality of signal frequencies, and The present invention can be applied to various systems that use a plurality of resonance circuits corresponding to a plurality of frequencies.

  Moreover, in Example 1 to Example 5, although the case where the resonance circuit corresponding to two different signal frequencies was switched was demonstrated to the example, of course in the on-board communication apparatus shown by this invention, according to three or more frequencies, It is also possible to switch the resonance circuit and transmit a signal having three or more resonance frequencies. In order to transmit three or more resonance frequencies, resonance capacitors for constituting the LC resonance circuit are prepared for the types of frequencies to be transmitted, and any one of the resonance capacitors corresponding to the power wave frequency to be transmitted is prepared. May be selected by the resonance circuit switching unit.

  As described above, according to the present invention, it is possible to cope with a plurality of power waves having different frequencies without changing the number of turns of the power wave transmitting antenna between the power wave frequency f1 transmission and the frequency f2 transmission. An on-vehicle communication device capable of switching a plurality of resonance circuits can be provided. Since there is no change in the number of antenna turns, the current value per antenna turn of the power wave transmitting antenna 15 when transmitting the required amount of power to the ground does not change before and after switching of the resonance circuit, and the antenna current is monitored. Thus, when performing transmission level control or level drop failure detection, the target value and failure determination threshold value monitored before and after switching of the resonance circuit can be made the same. Further, since the number of turns of the antenna is a unique fixed number of turns, there is no intermediate tap, the structure of the antenna is simplified, and the apparatus cost can be reduced.

  Further, according to the present invention, the transmission frequency of the power wave frequency oscillator can be switched, so that two power wave frequency oscillators and a power wave amplifier are required for transmission of the power wave frequency f1 and transmission of the frequency f2. In addition, it is possible to provide an on-vehicle communication device capable of transmitting a plurality of power waves having different frequencies by using only one set of a power wave frequency oscillator and a power wave amplifier. Therefore, according to the present invention, not only the two sets of power wave frequency oscillators and power wave amplifiers disclosed in Patent Document 1 can be reduced to one set of power wave frequency oscillators and power wave amplifiers, but also the power wave transmission switching circuit is eliminated. It becomes possible. Therefore, it is possible to reduce the manufacturing cost by reducing the circuit mounting area and mounting parts.

In addition, this invention is not limited to the Example mentioned above, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.
Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as a program for realizing each function can be stored in a recording device such as a memory or a hard disk, or a recording medium such as an IC card, an SD card, or a DVD.
Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

DESCRIPTION OF SYMBOLS 1 Car element 11 Car transmitter / receiver 111 Power wave generation part 112 Power wave frequency oscillator 113 Power wave amplifier 114 Power wave frequency selection part 115 Sine wave arithmetic element 116 DA converter 12 Outfitting line 121 Outfitting line (electric power wave transmission line)
122 Outfitting line (information wave transmission / reception line)
123 Outfitting line (Resonance circuit switching command signal line)
13 Resonant circuit switching unit (configuration to switch two types of capacitors)
131 Relay contact 132 Relay coil 133 Switching command input 14 Resonance capacitor 141 Resonance capacitor C1 for frequency f1
142 Resonant capacitor C2 for frequency f2
15 Power wave transmitting antenna 16 Information wave transmitting / receiving antenna 21 Train 22 Driving section switching SW (switch)
23 Train control unit 24 Ground unit (for power frequency f1)
25 Ground unit (for power frequency f2)
51 Resonant circuit switching unit (configuration to add (subtract) capacitor)
52 Relay contact 53 Resonant capacitor 54 Capacitor C3
55 Capacitor C4
61 Resonant circuit switching unit (configuration to switch between two pairs of resonant circuits)
62 Power wave transmitting antenna A
63 Power wave transmitting antenna B
71 Resonant circuit switching unit 72 Power wave transmission level monitor line 73 Terminating resistor 91 Resonant circuit switching unit (configuration with relay contacts as both ends of capacitor)
92 Relay coil 93 Relay contact (input side)
94 Relay contact (output side)

Claims (10)

A unique fixed winding capable of transmitting a plurality of power waves having different frequencies, which is an antenna capable of transmitting a power wave for driving a ground device (24, 25) arranged along a traveling path of the vehicle (21). At least one power wave transmitting antenna (15) consisting of a number;
A plurality of resonant capacitors (14) connected to the power wave transmitting antenna (15) and resonating with each of the plurality of power waves having different frequencies;
A resonance circuit switching unit (13) capable of selectively switching connection and disconnection between the plurality of resonance capacitors (14) and the power wave transmission antenna (15);
A switching command input (133) for switching an arbitrary resonant capacitor from the plurality of resonant capacitors (14) to the resonant circuit switching unit (13);
A power wave generator (111) for generating a plurality of power waves having different frequencies and outputting a power wave signal;
A power wave frequency selection unit (114) for outputting a frequency selection and switching command signal of the power wave signal;
The power wave generator (111) includes a set of power wave frequency oscillator (112) and a power wave amplifier (113),
On-vehicle communication device with
The power wave signal is an input signal to the power wave transmitting antenna (15), the switching command signal is a command signal to the switching command input (133),
The power wave transmitting antenna (15) is determined by determining the output of the switching command signal and the frequency of the power wave signal output from the power wave generating unit (111) in accordance with a command of the power wave frequency selecting unit (114). The on-board communication device is characterized in that the frequency of the power wave transmitted from (1) matches the resonance frequency of the power wave transmitting antenna (15). The on-vehicle communication device according to claim 1,
A vehicle upper (1) comprising the power wave transmission antenna (15), the plurality of resonance capacitors (14), the resonance circuit switching unit (13), and the switching command input (133),
An on-vehicle communication device comprising an on-vehicle transceiver (11) including the power wave generation unit (111) and the power wave frequency selection unit (114). The on-vehicle communication device according to claim 1,
A vehicle upper (1) comprising the power wave transmitting antenna (15) and the plurality of resonant capacitors (14),
An on-vehicle transceiver (11) comprising the resonance circuit switching unit (13), the switching command input (133), the power wave generation unit (111), and the power wave frequency selection unit (114). An on-vehicle communication device characterized by comprising. The on-vehicle communication device according to any one of claims 1 to 3,
The resonant circuit switching unit (13) includes a relay contact (131) for selectively switching one or more of the plurality of resonant capacitors (14) to connect to the power wave transmitting antenna (15);
An on-vehicle communication device comprising: a relay coil (132) for driving the relay contact (131) based on the switching command input (133). The on-vehicle communication device according to any one of claims 1 to 4,
The plurality of resonance capacitors (14) are provided in accordance with the number of power waves that can transmit capacitors having resonance capacitances corresponding to the plurality of power waves having different frequencies.
The on-vehicle communication device characterized in that the resonance circuit switching unit (13) is configured to connect only one capacitor having any capacity according to a power wave frequency to the power wave transmitting antenna (15). The on-vehicle communication device according to any one of claims 1 to 4,
The plurality of resonant capacitors (53) include a capacitor Cfmax (55) having a resonance capacity corresponding to a power wave having the highest frequency among the plurality of power waves having different frequencies.
Capacitor Cdiff (54) having a capacity corresponding to the frequency difference between the highest frequency power wave and the other frequency power wave is set to the number of power waves that can be transmitted other than the highest frequency power wave. In response,
The resonant circuit switching unit (51) connects only the capacitor Cfmax (55) to the power wave transmitting antenna (15) during power wave transmission of the highest frequency according to the power wave frequency, and other frequencies. On-vehicle communication device characterized in that, in addition to the capacitor Cfmax (55), the capacitor Cdiff (54) corresponding to the frequency difference is additionally connected to the power wave transmitting antenna (15) at the time of power wave transmission . The on-vehicle communication device according to any one of claims 1 to 4,
A plurality of resonant circuits in combination with the resonant capacitors (141, 142) and the power wave transmitting antennas (62, 63) are provided according to the number of power waves that can be transmitted,
The resonance capacitors (141, 142) of the resonance circuit have resonance capacitors corresponding to the power waves of the respective frequencies,
The on-board communication device, wherein the resonance circuit switching unit (61) is configured to selectively switch any one of the resonance circuits. The on-vehicle communication device according to claim 7,
When the power wave transmitting antenna (62, 63) is not used for transmitting the power wave, the power wave transmitted by another power wave transmitting antenna (62, 63) is received and received. The on-board communication device, wherein the power wave transmission state of the other power wave transmitting antennas (62, 63) is monitored by monitoring the power wave. The on-vehicle communication device according to any one of claims 1 to 8,
The ground devices (24, 25) arranged along the travel path of the vehicle (21) receive a power wave frequency switching command that is information indicating the frequency of the power wave corresponding to the section in which each of the ground devices is installed. Transmitted to the on-board communication device as a wave signal,
The on-board communication device includes an information wave transmitting / receiving antenna (16) for transmitting and receiving the information wave signal,
The power wave frequency selection unit (114) of the on-board communication device, according to the power wave frequency switching command included in the information wave signal received from the ground device (24, 25),
An on-vehicle communication device that determines an output command for the power wave generation unit (111) and the switching command input (133) from the power wave frequency selection unit (114).   A vehicle (21) equipped with the on-board communication device according to any one of claims 1 to 9, wherein the vehicle (21) corresponds to a ground device (24, 25) in a section in which the vehicle (21) travels. A vehicle comprising means for selecting a frequency of the power wave.

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