WO2007010970A1 - Système de communication et dispositif de communication - Google Patents

Système de communication et dispositif de communication Download PDF

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Publication number
WO2007010970A1
WO2007010970A1 PCT/JP2006/314355 JP2006314355W WO2007010970A1 WO 2007010970 A1 WO2007010970 A1 WO 2007010970A1 JP 2006314355 W JP2006314355 W JP 2006314355W WO 2007010970 A1 WO2007010970 A1 WO 2007010970A1
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WO
WIPO (PCT)
Prior art keywords
transceiver
vehicle
signal
cable
conductor
Prior art date
Application number
PCT/JP2006/314355
Other languages
English (en)
Japanese (ja)
Inventor
Yoshihiro Hagiwara
Fumiyasu Watanabe
Yuuichi Sakuma
Osamu Ohsawa
Original Assignee
Cocomo Mb Communications, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cocomo Mb Communications, Inc. filed Critical Cocomo Mb Communications, Inc.
Priority to JP2006549201A priority Critical patent/JP3927595B2/ja
Publication of WO2007010970A1 publication Critical patent/WO2007010970A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
    • B60C23/0433—Radio signals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
    • B60C23/0433—Radio signals
    • B60C23/0435—Vehicle body mounted circuits, e.g. transceiver or antenna fixed to central console, door, roof, mirror or fender
    • B60C23/0444—Antenna structures, control or arrangements thereof, e.g. for directional antennas, diversity antenna, antenna multiplexing or antennas integrated in fenders

Definitions

  • the present invention relates to a communication system and a communication device.
  • the present invention relates to a communication system and a communication device inside a vehicle including, but not limited to, a moving body such as an automobile, a truck, a train, a ship, and an aircraft.
  • FIG. 16 shows an information communication system using a 2.4 GHz frequency band in a car using conventional wireless technology.
  • 100a is an automobile body frame
  • 100b is an automobile cabin.
  • 101a, 101b, 101c and lOld are tires, and a wheel part (not shown) of each tire has a sensor 105a and a transmitter 104a, a sensor 105b and a transmitter 104b, a sensor 105c and a transmitter 104c, and a sensor.
  • 1 05d and transmitter 104d are provided.
  • the sensor 105a is an air pressure sensor that senses the air pressure of the tire 101a, and transmits information (air pressure information) based on the air pressure of the tire 101a to the transmitter 104a. Similarly to the sensor 105a, the sensors 105b, 105c, and 105d transmit signals based on the air pressure of the timers 101b, 101c, and lOld to the transmitters 104b, 104c, and 104d, respectively.
  • Transmitters 104a, 104b, 104c, and 104d transmit air pressure information of tires 101b, 101c, and lOld using radio waves in the 2.4 GHz frequency band, respectively.
  • the receivers 103a, 103b, 103c and 103d receive the air pressure information to which the transmitters 104a, 104b, 104c and 104d are also transmitted and transmit them to the CPU 102.
  • the CPU 102 processes the air pressure information and determines whether the air pressure of each tire 101a, 101b, 101c and lOld is at an appropriate value. Then, information based on the result is transmitted to the display device 106.
  • the display device 106 displays the information that the CPU power is also transmitted, and the driver of the car looks at the information on the display device 106 to determine whether the air pressure of the tires 101a, 101b, 101c, and 101d is at an appropriate value. Can be obtained.
  • Patent Document 1 US Pat.No. 6,600,896
  • the transmitters 104a, 104b, The structure of 104c and 104d and the receivers 103a, 103b, 103c and 103d is complicated, and the power consumption of the transmitter is large because the output level of the transmitter is set high in order to increase the success rate of data transmission. There is a problem.
  • This epoch-making information communication system by the present applicant is an information communication system between a first location inside a vehicle and a second location inside or near the vehicle.
  • the vehicle has a conductive metal structure that defines one or more major compartments such as bonnets, cabins, and trunks.
  • An excitation device (exciter device) is provided that includes an exciting exciter.
  • Each exciter includes an exciter conductively connected to the communication device and the metal structure of the vehicle.
  • Each communication device receives information at each location, modulates the signal accordingly, and performs two-way communication at radio frequencies.
  • the exciter receives signals from the respective communication devices and conductively injects the signals as currents into the vehicle's metal structure. Each exciter also conductively restores current from the vehicle's metal structure, obtains a signal from the current, and provides the signal to each communication device. The communication device then demodulates the signal strength information and provides the information at each location.
  • This epoch-making information communication system by the present applicant is based on the body of a vehicle such as an automobile (conduction The signal excited by the exciter is injected into the metal structure), the signal is taken into the cabin (cabin), received by the receiver installed near the driver's seat, and the received signal is processed by the CPU.
  • the display device is configured to display.
  • an exciter is provided in the wheel part of an automobile, and tire pressure information is injected into the wheel part via the exciter by a signal generator force of about 35 MHz.
  • a signal injected into the wheel is injected into the body of the automobile via the axle, and a high-frequency current flows from the wheel to the body. When this high-frequency current flows, electromagnetic waves are generated. A large amount of this electromagnetic wave is generated on the outer surface of the automobile body due to the skin effect.
  • the electromagnetic wave generated in the body is drawn into the cabin as a received signal.
  • One end of the coaxial cable is connected to the outer surface of the body, and the received signal is received by the receiver by pulling it into the car through a coaxial cable through a hole of about 1 cm in the body and connecting it to the receiver.
  • the receiver receives the signal injected into the wheel and displays tire pressure information on the display.
  • the present invention has been made to solve the above-described problems, and provides a communication system in a vehicle that can realize low power consumption, high efficiency, and high speed transmission.
  • a vehicle, a first transceiver, and the first transceiver are connected, Based on the first signal transmitted from the first transceiver, the electrical conductor of the vehicle is excited, and the second signal transmitted from the electrical conductor of the vehicle is received, and the first transceiver A first exciter for transmission, a second transmitter / receiver installed inside the vehicle, and the second signal connected to the second transmitter / receiver and transmitted by the second transmitter / receiver.
  • a second exciter for exciting the conductor of the vehicle through a cable and receiving the first signal transmitted to the conductor force of the vehicle and transmitting the first signal to the second transceiver There is provided a communication system having a hole for introducing the cable into the vehicle, and a high-frequency noise prevention element covering the cable in the hole.
  • the high-frequency noise prevention element may be a ferrite core or a toroidal core.
  • the vehicle, the first transceiver, and the first transceiver connected to the first transceiver is transmitted based on the first signal transmitted.
  • the second transmitter / receiver, and based on the second signal transmitted from the second transmitter / receiver excites the electric conductor of the vehicle through a semi-rigid cable.
  • a second exciter for receiving the first signal transmitted from the conductor of the vehicle and transmitting the first signal to the second transmitter / receiver, and for introducing the semi-rigid cable into the vehicle.
  • a hole and an insulator covering the cable in the hole. Shin system is provided.
  • a sensor may be connected to the first transceiver.
  • a CPU may be connected to the second transceiver.
  • the first transceiver is connected to the first transceiver, and the vehicle conductor is excited based on the first signal transmitted from the first transceiver.
  • a first exciter that receives the second signal transmitted from the vehicle and transmits the signal to the first transceiver, and a second transceiver installed in the vehicle. Based on the second signal connected to the second transmitter / receiver and transmitted from the second transmitter / receiver.
  • a second exciter that excites the conductor of the vehicle through a cable and receives the first signal transmitted from the conductor of the vehicle and transmits the first signal to the second transceiver; and
  • a communication apparatus having a hole for introducing a cable into the vehicle and a high-frequency noise preventing element that covers the cable in the hole.
  • the high-frequency noise prevention element may be a ferrite core or a toroidal core.
  • the first transceiver is connected to the first transceiver, and the vehicle conductor is excited based on the first signal transmitted from the first transceiver.
  • a first exciter that receives the second signal transmitted from the vehicle and transmits the signal to the first transceiver, and a second transceiver installed in the vehicle.
  • the conductor of the vehicle is excited through a semi-rigid cable based on the second signal connected to the second transmitter / receiver and transmitted from the second transmitter / receiver.
  • a second exciter that receives the first signal transmitted from the body and transmits the first signal to the second transceiver; a hole for introducing the semi-rigid cable into the vehicle; and the hole! And an insulator covering the cable.
  • a sensor may be connected to the first transceiver.
  • a CPU may be connected to the second transceiver.
  • the communication system and the communication device of the present invention it is possible to perform information communication in a vehicle with a simple configuration and high efficiency without using a conventional wire communication or a conventional wireless communication using an optical cable or an optical cable. There is a remarkable effect.
  • FIG. 1 is a schematic configuration diagram of an embodiment of a communication system according to the present invention.
  • FIG. 2 is a schematic configuration diagram of an embodiment of a communication system according to the present invention.
  • FIG. 3 is a simplified cross-sectional view of an automobile according to an embodiment of a communication system of the present invention.
  • FIG. 4 is a diagram of a portion where the cable 19 is drawn into the cabin 10b in the embodiment of the communication system of the present invention.
  • FIG. 5 is a block diagram of an embodiment of a communication system of the present invention.
  • FIG. 6 is a diagram showing a configuration of an exciter of the communication system of the present invention according to the present embodiment.
  • FIG. 7 is a graph showing frequency characteristics of the exciter shown in FIG. 6 (b).
  • FIG. 8 is a graph showing the S parameter characteristics of the exciter shown in FIG. 6 (b).
  • FIG. 9 is a schematic configuration diagram of an embodiment of a communication system according to the present invention.
  • FIG. 10 is a cross-sectional view and a side view of a semi-rigid wire 40 used in the communication system of the present invention.
  • FIG. 11 is a side view of a toroidal core 50 used in the communication system of the present invention.
  • FIG. 12 is a measurement screen of a network analyzer that measures S-parameter S21 characteristics of an exciter used in the communication system of the present invention.
  • FIG. 13 is an example of a communication system of the present invention.
  • FIG. 14 is a graph showing transmission characteristics according to an embodiment of the communication system of the present invention.
  • FIG. 15 is an example of a communication system according to the present invention.
  • FIG. 16 is a schematic configuration diagram of an information communication system using a frequency band of 2.4 GHz by a conventional wireless technology in an automobile.
  • FIG. 1 (a) is a schematic configuration diagram of a communication system of the present invention according to the present embodiment.
  • 10a is the body of the car
  • 10b is the cabin
  • 10c is the axle of the body.
  • the car body 10a and cabin 10b are electrically connected Yes.
  • the wheels l la, l lb, 11c and l id which are electrically connected to the axle part of the body have exciters 16a, 16b, 16c and 16d (in FIG. 1, 16a and 16b are not shown).
  • the transceivers 15a, 15b, 15c and 15d in FIG.
  • the tire and the wheel are collectively shown as tire ⁇ wheel l la, l ib, 11c and l id.
  • the body 10a and the axle portion 10c of the body are electrically connected, and these may be collectively referred to as the body 10a.
  • Fig. 1 (b) shows a cross-sectional view along AA 'of the tire / wheel 11c and the body (axle portion) shown in Fig. 1 (a). It is understood that the wheel portion of the tire 'wheel 11c is electrically connected to the body (axle) 10c. 22c is a wheel cover.
  • FIG. 2 shows a schematic configuration diagram of a communication system of the present invention according to the present embodiment.
  • 11a, 11b, 11c, and id are tire'wheels, and sensors 15a, 15b, 15c, and 15d are provided on the respective wheel portions.
  • the sensor 15a is an air pressure sensor that senses the air pressure of the tire wheel 11a, and transmits a signal (air pressure signal) to the transceiver 14a based on the air pressure of the tire wheel 1la.
  • the sensors 15b, 15c, and 15d transmit the pneumatic signals of the tires' wheels l lb, 11c, and l id to the transceivers 14b, 14c, and 14d, respectively.
  • the frequency of the pneumatic signal transmitted from the transceivers 14a to 14d is about 20 MHz, but is not limited to this.
  • the frequency band used for the communication system of the present invention is preferably 0.5 MHz or more, and more preferably 20 MHz to 25 MHz. As shown in FIG. 12, this preferred frequency band is 20 MHz to 25 MHz and has a small transmission loss when the S parameter S21 characteristic is measured by the network analyzer of the exciter of this embodiment! / It is understood from that.
  • the communication system of the present invention is used in a tire air pressure monitoring system. Therefore, the force using the sensors 15a, 15b, 15c and 15d.
  • the communication system uses a light control system that controls light ON and OFF, light intensity, etc., an air conditioner control system, and a source such as a DVD.
  • a switch element, relay element or the like may be used instead of a sensor.
  • the transceiver 14a inputs a pneumatic signal to the exciter 16a, and the pneumatic signal is excited by the exciter 16a and injected into the axle portion 10c of the body. A high-frequency current flows through the body frame 10c due to the excited air pressure signal. Similar operations are performed for the transceivers 14b, 14c, and 14d. In addition, header information is attached to each air pressure signal generated by each of the transceivers 14a, 14b, 14c, and 14d, and each information is identified. The frequency of each pneumatic signal generated by each transceiver 14a, 14b, 14c and 14d may be changed, or the time division method may be used!
  • FIG. 3 is a simplified cross-sectional view of an automobile used in the communication system of the present invention according to this embodiment.
  • the tire pressure signals excited by the exciters 16a, 16b, 16c, and 16d are respectively injected into the body axle section 10c, and the body axle section 10c to the body 10a have high-frequency signals based on the respective pneumatic signals.
  • many electromagnetic waves are generated on the outer surface of the body 10a due to the skin effect.
  • FIG. 4 (a) shows a view of the portion where the cable 19 is pulled into the cabin 10b
  • FIG. 4 (b) shows a cross-sectional view of FIG. 4 (a).
  • a cable 19 in this embodiment, a coaxial cable
  • electromagnetic waves generated on the outer surface of the body are drawn into the cabin 1 Ob using the cable 19.
  • a force that electrically connects the cable 19 to a part of the body 10a by using the solder bump 34 may be screwed or other means that are not limited to this.
  • a hole 31 having a diameter of about 1 cm is formed in an iron plate (in this embodiment, a trunk plate 30) that is a part of the body 10a, and a magnetized ferrite core 20 is formed in the hole 31.
  • the cable 19 is taken into the vehicle so that the cable 19 is covered with the ferrite core 20.
  • the size of the hole 31 can be changed in time. Since the electromagnetic wave generated on the outer surface of the body 10a flows to the ferrite core 20, the signal transmitted to the cable 19 is not adversely affected by the electromagnetic wave generated on the outer surface of the body 10a. Therefore, electromagnetic waves generated on the outer surface of the body 10a can be taken into the cabin 10b.
  • the electromagnetic wave taken into the cabin 10b by the cable 19 is transmitted to an exciter 18 electrically connected to the cable 19, and the air pressure of each tire wheel l la, l ib, 11c and l id is transmitted by the exciter 18
  • the signal is restored.
  • the restored air pressure signal is transmitted to the transceiver 17 and received.
  • the air pressure signal received by the transceiver 17 is transmitted to the CPU 12, processed by the CPU 12, and then transmitted to the display device 21.
  • the display device 21 displays the air pressure of each tire wheel l la, l lb, 11c and l id processed by the CPU 12.
  • the driver of the automobile can obtain information on whether or not the air pressure of the tires 101a, 101b, 101c and 101d is an appropriate value by looking at the information on the display device 106.
  • the CPU 12 transmits / receives a request signal for a pneumatic signal and other control signals to the transceiver 17 by the transceivers 14a, 14b, 14c, and 14d.
  • the signal is excited by the exciter 16 a and injected into the cable 19. Since the cable 19 is covered with the ferrite core 20 that is a high-frequency noise prevention element, the electromagnetic wave generated on the outer surface of the body 10a flows to the ferrite core 20 and thereby the electromagnetic wave generated on the outer surface of the body 10a.
  • the signal transmitted to table 19 is not adversely affected.
  • the signal transmitted to the cable 19 can be transmitted to the trunk plate 30 which is a part of the body 10a, and a high-frequency current flows on the outer surface of the body 10a due to the skin effect.
  • the high-frequency current flowing on the outer surface of the body 10a flows to the axle portion 10c of the electrically connected body, and the signals are restored by the exciters 16a, 16b, 16c and 16d, and the transceivers 14a, 14b, 14c and Those signals are transmitted to 14d.
  • bidirectional communication is performed between the transceivers 14a, 14b, 14c and 14d and the transceiver 17, in other words, between the sensors 15a, 15b, 15c and 15d and the CPU. be able to.
  • it is possible to perform information communication in the vehicle with a simple configuration and high efficiency without using a conventional wire communication using a conducting wire or an optical cable or a conventional wireless communication.
  • FIG. 5 is a block diagram showing the communication system of the present invention according to this embodiment.
  • the sensor 15a uses a power solar cell provided with a notch (250 mAH, 1.8V), or self-power generation using a coil.
  • a battery or the like may be used.
  • the electromotive force generated using a thermocouple may be used as an alternative to a battery.
  • the transceiver 14a includes the CPU 14a-1, TXZRX (transmission / reception) IC 14a-2, IF / BPF (interface / bandpass filter) 14a-3, OSC (oscillator) 14a— 4S and BPF (bandpass filter) 14a-5 1S are not limited to this.
  • transceiver 17 consists of CPU17-1, TX / RX (transmission / reception) IC17-2, IFZBPF (interface Z bandpass filter) 17-3, OSC (oscillator) 17-4 and BPF (bandpass filter) 17-5
  • the present invention is not limited to this.
  • FIG. 6 shows an example of the exciters 16a, 16b, 16c and 16d and 18 of the communication system of the present invention according to the present embodiment.
  • the exciter shown in Fig. 6 (a) consists of a resistor R and a capacitor CO connected in series.
  • the force connecting the resistor R side terminal to the transceiver side and the capacitor CO side terminal to the body axle 10c side is not limited to this.
  • FIG. 6 (b) shows another example of the exciters 16a, 16b, 16c and 16d and 18 of the communication system of the present invention according to the present embodiment.
  • the exciter shown in Fig. 6 (b) has five capacitors C1 to C5 and two inductors L2 and L4.
  • the exciter shown in Fig. 6 (b) is a kind of low-pass filter. As shown in Figure 6 (b), this exciter consists of a circuit A in which an inductor L2 and a capacitor C2 are connected in parallel and a circuit B in which an inductor L4 and a capacitor C4 are connected in parallel.
  • capacitors Cl, C3, and C5 One end of capacitors Cl, C3, and C5 is connected to each end of A and B, and the other end of capacitors Cl, C3, and C5 is connected to have a common potential.
  • the end of capacitor C1 is ⁇ port 1 ''
  • the end of capacitor C5 is port 2
  • the characteristic impedance of port 1 is Zin (input impedance )
  • the characteristic impedance of port 2 is Zout (output impedance).
  • the cut-off frequency is fc
  • Zin Zout
  • the design values of the capacitors C1 to C5 and the inductors L2 and L4 are obtained using the following formulas (1) to (3).
  • FSF is a frequency scaling factor.
  • FSF 2 ⁇ -fc (1)
  • Table 3 shows the frequency-dependent characteristics of the scattering parameters (S-parameters) of the exciter shown in Fig. 6 (b).
  • S-parameters the scattering parameters
  • FIG. 7 is a graph showing the frequency dependence of the S parameter shown in Table 3.
  • ⁇ indicates S-parameter S21 (forward impedance characteristics)
  • Countery indicates S-parameter S11 (input-side impedance characteristics)
  • ⁇ indicates S-parameter S22 (output-side impedance characteristics).
  • FIG. 9 shows a schematic configuration diagram of a communication system of the present invention according to the present embodiment.
  • the communication system of the present invention according to the present embodiment is provided with transmitters / receivers 17a and 18a corresponding to the transmitter / receiver 14a and the exciter 16a.
  • transmission / reception is performed corresponding to the transmitter / receiver 14b and the exciter 16b.
  • 17b and 18b are provided, transceivers 17c and 18c are provided corresponding to the transceiver 14c and the exciter 16c, and transceivers 17d and 18d are provided corresponding to the transceiver 14d and the exciter 16d. It has been.
  • the ferrite core 20 is used as the high-frequency noise preventing element that covers the periphery of the cable described in the above-described embodiment.
  • the ferrite core is used as the ferrite core.
  • an example of the communication system of the present invention using a semi-rigid wire or a toroidal core will be described. Since other configurations are the same as those in the above-described embodiment, description thereof is omitted here.
  • FIGS. 10 (a) and 10 (b) show a cross-sectional view and a side view of the semi-rigid wire 40 used in the communication system of the present embodiment, respectively.
  • 41 is a central conductor
  • 42 is a silver tube
  • 43 is an insulator.
  • the semi-rigid wire is covered with insulating rubber 44.
  • the electromagnetic wave generated on the outer surface of the body 10a does not adversely affect the signal transmitted on the semi-rigid line 40. Therefore, electromagnetic waves generated on the outer surface of the body 10a can be taken into the cabin 10b. it can.
  • FIG. 11 shows a side view of the toroidal core 50 used in the communication system of the present embodiment.
  • the toroidal core 50 has a donut-shaped permanent magnet 51 covered with a shoreline 52.
  • the signal transmitted to the cable 19 is adversely affected by the electromagnetic waves generated on the outer surface of the body 10a. There is nothing. Therefore, electromagnetic waves generated on the outer surface of the body 10a can be taken into the cabin 10b.
  • FIG. 13 As shown in FIG. 13, in this embodiment, the insulator 61 is sandwiched between the conductor 60 and the body 10a, the cable 19 is connected to the conductor 60, and the body 31a is opened through the hole 31. The signal is taken into 10a.
  • the cable 19 may be a coaxial cable.
  • the insulator 61 it is preferable to use cellophane (dielectric constant 6.1 to 7.4), Teflon (registered trademark) (dielectric constant 2), etc., and acrylic resin (dielectric constant 2. 7-4.5), silicone resin (dielectric constant 3.5-5), etc. can be used.
  • FIG. 14 is a graph showing transmission characteristics in the communication system of this example.
  • Fig. 14 shows that when the signal frequency is changed from 45MHz to 60MHz, it is pulled into the inside of the body by the "tire" wheel one body body outer surface (trunk outer surface) cable "in the communication system of this embodiment. The frequency transmission characteristics of the communication channel are shown. From FIG. 14, it is understood that the communication characteristic of this embodiment is excellent in transmission characteristics with a frequency of about 45 MHz to about 50 MHz.
  • electromagnetic waves generated on the outer surface of the body can be taken into the body using a simple configuration.
  • Example 4 In the communication system of the present embodiment, an example in which a signal is taken into the body by passing a bolt through a hole in the body and fixing the cable in contact with the inside of the body with a bolt and a nut will be described. To do. Since other configurations are the same as those in the above-described embodiment, the description thereof is omitted here.
  • FIG. 15 As shown in FIG. 15, in this embodiment, a bolt 60 is inserted into a hole 31 formed in the body 10a, and a cable 19 brought into contact with the inside of the body 10a through a washer 61 is fixed by a bolt and a nut 61. The signal is taken into the body 10a.
  • the cable 19 may be a coaxial cable.
  • electromagnetic waves generated on the outer surface of the body can be taken into the body using a simpler configuration.
  • the power used to describe an example in which the communication system of the present invention is used for a tire pressure monitoring system is limited to this. Therefore, it can be applied to various control systems in a vehicle such as a light control system that controls ON / OFF of light in a vehicle and a light control system, an air conditioner control system, and a video information control system using a source such as a DVD. Applicable.
  • the communication system and the communication device of the present invention it is possible to perform information communication in a vehicle with a simple configuration and high efficiency without using a conventional wire communication or a conventional wireless communication using an optical cable or an optical cable. .
  • the communication system of the present invention can be used for a moving body such as a train, a car, a ship, an airplane, or any other vehicle.

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  • Arrangements For Transmission Of Measured Signals (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

La présente invention concerne un système de communication comprenant un véhicule ; un premier émetteur-récepteur ; un premier excitateur relié au premier émetteur-récepteur qui sollicite, selon un premier signal transmis par celui-ci, un conducteur du véhicule, reçoit un second signal émis par ledit conducteur et transmet le signal reçu au premier émetteur-récepteur ; un second émetteur-récepteur disposé dans le véhicule ; un second excitateur relié au second émetteur-récepteur qui sollicite, selon le second signal transmis par celui-ci, le conducteur via un câble, reçoit le premier signal émis par le conducteur et transmet le signal reçu au second émetteur-récepteur ; un orifice par lequel le câble est installé dans le véhicule ; et un élément d’inhibition de bruit haute fréquence qui enveloppe le câble au niveau de l’orifice.
PCT/JP2006/314355 2005-07-20 2006-07-20 Système de communication et dispositif de communication WO2007010970A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006549201A JP3927595B2 (ja) 2005-07-20 2006-07-20 通信システム及び通信装置

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Application Number Priority Date Filing Date Title
JP2005-210154 2005-07-20
JP2005210154 2005-07-20

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WO2007010970A1 true WO2007010970A1 (fr) 2007-01-25

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JP2007272590A (ja) * 2006-03-31 2007-10-18 Pacific Ind Co Ltd データ通信システム
EP1792757A3 (fr) * 2005-11-30 2008-01-23 Pacific Industrial Co., Ltd. Système de surveillance de l'état de pneumatiques

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JPS5030568A (fr) * 1973-07-18 1975-03-26
JPH10309914A (ja) * 1997-05-12 1998-11-24 Toyota Motor Corp タイヤ空気圧検出装置
WO2003103195A1 (fr) * 2002-05-30 2003-12-11 Cocomo Mb Communications, Inc. Systeme excitation par excitateurs et procede de communication
JP2005138605A (ja) * 2003-11-04 2005-06-02 Honda Motor Co Ltd タイヤ空気圧監視装置
JP2006103441A (ja) * 2004-10-04 2006-04-20 Yokohama Rubber Co Ltd:The タイヤ状態検出装置

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JPS5030568A (fr) * 1973-07-18 1975-03-26
JPH10309914A (ja) * 1997-05-12 1998-11-24 Toyota Motor Corp タイヤ空気圧検出装置
WO2003103195A1 (fr) * 2002-05-30 2003-12-11 Cocomo Mb Communications, Inc. Systeme excitation par excitateurs et procede de communication
JP2005138605A (ja) * 2003-11-04 2005-06-02 Honda Motor Co Ltd タイヤ空気圧監視装置
JP2006103441A (ja) * 2004-10-04 2006-04-20 Yokohama Rubber Co Ltd:The タイヤ状態検出装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1792757A3 (fr) * 2005-11-30 2008-01-23 Pacific Industrial Co., Ltd. Système de surveillance de l'état de pneumatiques
US7446651B2 (en) 2005-11-30 2008-11-04 Pacific Industrial Co., Ltd. Tire condition monitoring system
JP2007272590A (ja) * 2006-03-31 2007-10-18 Pacific Ind Co Ltd データ通信システム

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JPWO2007010970A1 (ja) 2009-01-29

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