WO2018207596A1 - Dispositif de détection et système de surveillance de la pression d'air de pneu - Google Patents

Dispositif de détection et système de surveillance de la pression d'air de pneu Download PDF

Info

Publication number
WO2018207596A1
WO2018207596A1 PCT/JP2018/016388 JP2018016388W WO2018207596A1 WO 2018207596 A1 WO2018207596 A1 WO 2018207596A1 JP 2018016388 W JP2018016388 W JP 2018016388W WO 2018207596 A1 WO2018207596 A1 WO 2018207596A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
signal
tire
air pressure
detection device
Prior art date
Application number
PCT/JP2018/016388
Other languages
English (en)
Japanese (ja)
Inventor
山口　慎二
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Publication of WO2018207596A1 publication Critical patent/WO2018207596A1/fr

Links

Images

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
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L17/00—Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies

Definitions

  • the present invention relates to a detection device and a tire pressure monitoring system.
  • This application claims priority based on Japanese Patent Application No. 2017-95799 filed on May 12, 2017, and incorporates all the description content described in the above Japanese application.
  • TPMS Tire Pressure ⁇ ⁇ ⁇ Monitoring System
  • a tire air pressure monitoring system detects a tire air pressure, wirelessly transmits a pneumatic signal including information on the air pressure obtained by the detection using a radio wave in the UHF band, and a pneumatic signal wirelessly transmitted from the detection device And a monitoring device that monitors the tire air pressure based on the received air pressure signal.
  • the monitoring device is provided in the vehicle body, and the sensor identifier of each detection device is stored in the memory in association with the four tire positions where the tire is provided in the vehicle.
  • the monitoring device is connected to four LF transmitting antennas arranged in the vicinity of each tire.
  • the monitoring device transmits a request signal including a corresponding sensor identifier from each LF transmission antenna corresponding to each tire position to each tire position using a radio wave in an LF (Low Frequency) band. Since the communication range of each LF transmission antenna is basically limited to the range of the corresponding tire position, the monitoring device can transmit a request signal to each detection device provided in each tire.
  • the detection device is provided in each of the right front, left front, right rear, and left rear tires, and when the sensor identifier included in the received request signal matches the sensor identifier of the own device, the detection device is obtained.
  • Air pressure signals including air pressure are transmitted wirelessly.
  • the monitoring device receives the air pressure signal transmitted from each detection device, and monitors the air pressure of each tire.
  • TFA Transire Fill Assist
  • Patent Document 1 discloses a keyless entry device having a tire air pressure monitoring function.
  • the keyless entry device sets the receiving unit to the tire pressure monitoring mode when the vehicle ignition switch is turned on, sets the receiving unit to continuous operation, and sets the receiving unit to the keyless entry mode when the ignition switch is turned off. Is set to intermittent operation.
  • the detection device is a detection device that detects the air pressure of a tire provided in a vehicle when a request signal is received, and transmits a pneumatic signal including information on the air pressure obtained by the detection.
  • a transmitting unit that continuously transmits a predetermined signal in accordance with the air pressure
  • a receiving unit that receives a limiting signal instructing limiting transmission of the predetermined signal
  • the receiving unit And a control unit that restricts transmission of the predetermined signal by the transmitting unit when the limiting signal is received.
  • the wireless frequency band used in the vehicle communication system that performs wireless communication with the portable device to lock and unlock the vehicle, etc. is the same as the frequency band of the signal wirelessly transmitted from the detection device of the tire pressure monitoring system. For this reason, radio wave competition may occur, and each system may not operate normally. In particular, when the tire air pressure increases or decreases, a predetermined signal is spontaneously transmitted from the detection device, so that there is a high possibility that a signal transmitted from the detection device and a signal transmitted from the portable device will interfere with each other.
  • An object of the present disclosure is to provide a detection device capable of suppressing interference between a signal transmitted from a portable device used for vehicle locking / unlocking control and the like and a signal transmitted from a detection device used for monitoring tire pressure. It is to provide a tire pressure monitoring system.
  • a detection device capable of suppressing interference between a signal transmitted from a portable device used for control of locking and unlocking of a vehicle and a signal transmitted from a detection device used for monitoring tire pressure, and It is possible to provide a tire pressure monitoring system.
  • a detection device is a detection device that detects the air pressure of a tire provided in a vehicle when a request signal is received, and transmits an air pressure signal including information on the air pressure obtained by the detection.
  • a transmitting unit that continuously transmits a predetermined signal according to the air pressure, and a receiving unit that receives a limiting signal instructing limitation of transmission of the predetermined signal;
  • a control unit configured to limit transmission of the predetermined signal by the transmission unit when the reception unit receives the restriction signal.
  • the detection device when the detection device receives a request signal transmitted from the outside, the detection device transmits an air pressure signal. Further, when the tire air pressure increases or decreases at a speed equal to or higher than the threshold, a predetermined signal is continuously transmitted according to the air pressure. For example, when the tire is filled with air, the detection device continuously transmits a predetermined signal. Further, when the tire air pressure rapidly decreases due to puncture or the like, the detection device continuously transmits a predetermined signal. However, when receiving a restriction signal transmitted from the outside, the detection device restricts transmission of the predetermined signal and suppresses continuous transmission of the predetermined signal. Therefore, by controlling the operation mode of the detection device, it is possible to suppress interference between the signal transmitted from the external communication device and the signal transmitted from the detection device.
  • the external communication device is, for example, a portable device that performs wireless communication with a vehicle in order to lock and unlock the vehicle door.
  • control unit cancels the restriction of the predetermined signal by the transmission unit when the reception unit receives a release signal instructing the release of the restriction.
  • the detection device when the transmission of the predetermined signal is restricted, the detection device removes the restriction when receiving the release signal transmitted from the outside. Therefore, in a situation where interference between the signal transmitted from the external communication device and the signal transmitted from the detection device does not cause a problem, the release signal is transmitted to the detection device, so that the tire can be filled with air or abnormal in air pressure. Monitoring can be resumed.
  • the tire pressure monitoring system performs wireless communication between the detection device of the aspect (1) or the aspect (2) provided in each of the plurality of tires of the vehicle and the detection device, And a monitoring device for monitoring the air pressure of each tire.
  • the monitoring device transmits a control signal to the detection device, thereby transmitting a signal transmitted from an external communication device and a signal transmitted from the detection device. It becomes possible to suppress interference with.
  • the monitoring device transmits the limit signal when a predetermined time has elapsed after the ignition switch of the vehicle is switched from the off state to the on state.
  • the monitoring device transmits the limit signal when an ignition switch of the vehicle is switched from an on state to an off state.
  • wireless communication related to locking / unlocking of the vehicle door is more likely to be important than monitoring of the tire air pressure.
  • the continuous transmission of the signal is restricted, and interference between the signal transmitted from the portable device for locking and unlocking the vehicle door and the signal transmitted from the detection device is suppressed.
  • the monitoring device transmits a release signal instructing release of the restriction when an ignition switch of the vehicle is switched from an off state to an on state.
  • wireless communication related to monitoring the tire air pressure before traveling may be more important than wireless communication related to locking and unlocking of the vehicle door. Because the price is high, the above restriction is lifted. Therefore, at the time of switching on the ignition, it is possible to monitor tire air filling and rapid increase / decrease in tire air pressure.
  • the vehicle has a function of locking and unlocking the vehicle by performing wireless communication with a portable device, and the detection device and the portable device transmit signals using radio waves in overlapping frequency bands.
  • a configuration for transmission is preferable.
  • FIG. 1 is a conceptual diagram showing a configuration example of a vehicle communication system according to an embodiment of the present invention.
  • the vehicle communication system according to the present embodiment functions as a tire air pressure monitoring system, and is applied to each of the vehicle-mounted device (monitoring device) 1 provided at an appropriate location of the vehicle body and the wheels of the plurality of tires 3 provided in the vehicle C.
  • a plurality of detection devices 2 provided and a notification device 4 are provided.
  • the detection device 2 detects the air pressure of the tire 3 provided with the device itself.
  • the vehicle-mounted device 1 wirelessly communicates with each detection device 2 to acquire information related to the air pressure of each tire 3, and the air pressure of each tire 3 is obtained using the notification device 4. Inform.
  • the vehicle communication system includes a portable device 9 that transmits and receives signals to and from the in-vehicle device 1, and the in-vehicle device 1 detects the position of the portable device 9 by performing a radio signal with the portable device 9. .
  • the in-vehicle device 1 and the portable device 9 constitute a smart entry (registered trademark) system that controls the locking and unlocking of the door.
  • a plurality of LF transmission antennas 14 a corresponding to the respective tires 3 are connected to the in-vehicle device 1.
  • the four LF transmitting antennas 14a are provided at the right front, right rear, left rear, and left front tire positions of the vehicle C.
  • the tire position is a position around the tire house and its surroundings, and is a position where the detection device 2 provided in each tire 3 can individually receive a signal transmitted from each LF transmission antenna 14a.
  • an alternate long and short dash line indicates a range in which the detection apparatus 2 can receive a request signal transmitted from each LF transmission antenna 14a.
  • the in-vehicle device 1 is connected to a plurality of LF transmission antennas 14b for detecting the position of the portable device 9.
  • the LF transmission antenna 14b is provided in the vicinity of the vehicle door and in the vehicle.
  • the LF transmission antenna 14a according to the present embodiment also functions as an antenna that transmits a position detection signal for detecting the position of the portable device 9 to the portable device 9, and the in-vehicle device 1 includes the LF transmission antenna 14a and the LF transmission antenna 14a. Wireless communication is performed with the portable device 9 using 14b, and the position of the portable device 9 is detected.
  • a unidirectional communication method and a bidirectional communication method as a method of wireless communication performed by the in-vehicle device 1 with the detection device 2.
  • the vehicle-mounted device 1 receives the air pressure signal mainly by bidirectional communication, and receives the air pressure signal mainly by unidirectional communication when the vehicle C is traveling.
  • the detection device 2 spontaneously transmits an air pressure signal at a predetermined timing.
  • the vehicle-mounted device 1 stores a relationship between each tire position where the tire 3 is provided and a sensor identifier of the detection device 2 provided on the tire 3 at the tire position.
  • each tire 3 is used by using the sensor identifier included in the air pressure signal.
  • the air pressure can be recognized.
  • the detection device 2 continuously transmits a predetermined signal according to the tire pressure.
  • the detection device 2 continuously transmits a predetermined signal when the air pressure of the tire 3 suddenly increases or decreases, for example, when the tire 3 is filled with air.
  • the portable device 9 transmits another predetermined signal when the tire air pressure decreases rapidly.
  • the vehicle-mounted device 1 transmits a request signal for requesting the air pressure signal of the tire 3 to each detection device 2 from each LF transmission antenna 14a to each detection device 2 by radio waves in the LF (Low Frequency) band.
  • the request signal includes the sensor identifier of the detection device 2 provided in the tire 3 at the tire position that is the transmission destination.
  • the detection device 2 receives a request signal including the same sensor identifier as the sensor identifier of its own device, the detection device 2 detects the air pressure of the tire 3, and detects the air pressure obtained by the detection and the air pressure signal including the sensor identifier of the own device as UHF. It transmits to the vehicle-mounted device 1 by radio waves in the (Ultra High Frequency) band.
  • the in-vehicle device 1 includes an RF receiving antenna 13a, receives the air pressure signal transmitted from each detection device 2 by the RF receiving antenna 13a, and acquires information on the air pressure of each tire 3 from the air pressure signal.
  • LF band and the UHF band are examples of a radio wave band used when performing wireless communication, and are not necessarily limited thereto.
  • the notification device 4 is connected to the in-vehicle device 1 via a communication line, and the in-vehicle device 1 transmits information related to the acquired air pressure to the notification device 4.
  • the notification device 4 receives the information transmitted from the in-vehicle device 1 and notifies the air pressure of each tire 3.
  • the vehicle equipment 1 issues a warning by the notification device 4 when the air pressure of the tire 3 is less than a predetermined threshold value. Further, the notification device 4 notifies information such as air filling of the tire 3 and a rapid decrease in tire air pressure.
  • FIG. 2 is a block diagram showing a configuration example of the in-vehicle device 1 according to the embodiment of the present invention.
  • the in-vehicle device 1 includes an in-vehicle control unit 11 that controls the operation of each component of the own device.
  • a storage unit 12, an in-vehicle receiving unit 13, an in-vehicle transmitting unit 14, and an input / output unit 15 are connected to the in-vehicle control unit 11.
  • the in-vehicle control unit 11 is a microcomputer having, for example, one or a plurality of CPUs (Central Processing Units), a multi-core CPU, a ROM (Read Only Memory), a RAM (Random Access Memory), an input / output interface, and the like.
  • the CPU of the in-vehicle control unit 11 is connected to the storage unit 12, the in-vehicle reception unit 13, the in-vehicle transmission unit 14, and the input / output unit 15 through an input / output interface.
  • the in-vehicle controller 11 controls the operation of each component by executing a control program stored in the storage unit 12, and executes a tire pressure monitoring process, a vehicle door locking / unlocking process, and the like according to the present embodiment. .
  • the storage unit 12 is a nonvolatile memory such as an EEPROM (ElectricallyrErasable Programmable ROM) or a flash memory.
  • storage part 12 has memorize
  • the storage unit 12 stores an identifier table.
  • the identifier table corresponds to a plurality of tire positions, an antenna identifier for identifying the LF transmission antenna 14a disposed in the vicinity of the tire position, and a sensor identifier of the detection device 2 provided in the tire 3 at the tire position. I remember it.
  • An RF receiving antenna 13 a is connected to the in-vehicle receiving unit 13.
  • the in-vehicle receiving unit 13 receives a signal transmitted from the detection device 2 or the portable device 9 using radio waves in the RF band by the RF receiving antenna 13a.
  • the in-vehicle receiver 13 is a circuit that demodulates the received signal and outputs the demodulated signal to the in-vehicle controller 11.
  • the in-vehicle receiving unit 13 receives an air pressure signal transmitted from the detection device 2.
  • the in-vehicle receiving unit 13 receives a response signal transmitted from the portable device 9 when detecting the position of the portable device 9.
  • the response signal includes information for detecting the position of the portable device 9.
  • a UHF band of 300 MHz to 3 GHz is used as a carrier wave, but the carrier wave is not limited to this frequency band.
  • the in-vehicle transmission unit 14 is a circuit that modulates the signal output from the in-vehicle control unit 11 into an LF band signal, and transmits the modulated signals to the detection device 2 from the plurality of LF transmission antennas 14a and 14b, respectively.
  • the carrier wave uses the LF band of 30 kHz to 300 kHz, but is not limited to this frequency band. For example, when detecting the air pressure of the tire 3 at an arbitrary timing, the in-vehicle transmission unit 14 transmits a request signal for requesting air pressure information from the LF transmission antenna 14 a to each detection device 2.
  • the in-vehicle transmission unit 14 sends a signal for switching the operation mode of the detection device 2 at a required timing, that is, a restriction signal for restricting the operation of the detection device 2 and a release signal for releasing the restriction from the LF transmission antenna 14a.
  • the restriction signal restricts the operation in which the detection device 2 continuously transmits a predetermined signal using radio waves in the UHF band when the tire 3 is filled with air or when the tire 3 is punctured.
  • the vehicle-mounted transmission part 14 transmits the signal for a position detection from LF transmission antenna 14a, 14b, when performing the position detection of the portable apparatus 9.
  • the input / output unit 15 is an interface for inputting and outputting signals, and is connected to the notification device 4, the vehicle speed sensor 5, the ignition switch 6, the positioning device 7, and the door ECU 8.
  • the input / output unit 15 may be a communication circuit that performs communication according to a communication protocol such as CAN (Controller Area Network) or LIN (Local Interconnect Network).
  • the input / output unit 15 transmits information related to the air pressure of the tire 3 to the notification device 4 under the control of the in-vehicle control unit 11. Also.
  • the in-vehicle control unit 11 acquires signals output from the vehicle speed sensor 5, the ignition switch 6, and the positioning device 7 via the input / output unit 15.
  • the notification device 4 is, for example, a display unit such as a meter display, a multi-information display, a head-up display, or the like that notifies information related to the air pressure of the tire 3 output from the input / output unit 15 by an image.
  • the notification device 4 displays the air pressure information of each tire 3 provided in the vehicle C as an image and a numerical value imitating the vehicle C. Further, the notification device 4 notifies the tire 3 that the air pressure is filled, the air pressure of the tire 3 is rapidly decreasing, based on the information transmitted from the in-vehicle control unit 11.
  • the notification device 4 may be an audio device or the like provided with a display unit or a speaker for notification by image or sound.
  • the display unit is a liquid crystal display, an organic EL display, or the like.
  • the notification device 4 may be configured to include a buzzer.
  • the buzzer is an audio output device that outputs a warning sound notifying that the tire 3 is filled with air pressure, a decrease in tire air pressure, or the like.
  • the in-vehicle control unit 11 can output a warning sound by outputting a buzzer on signal to the buzzer via the input / output unit 15.
  • the vehicle speed sensor 5 includes, for example, a magnetic pickup that transmits a signal proportional to the rotational speed of an axle provided in the vehicle C, a non-contact sensor that includes a hall element, and a counting circuit that measures the number of pulses from the non-contact sensor. And detecting the speed of the vehicle C by measuring the number of pulses.
  • the non-contact sensor is an example of the vehicle speed sensor 5 and is not limited to such a structure.
  • the vehicle speed sensor 5 may be configured to acquire information on the position of the vehicle C detected by GPS and detect the speed of the vehicle C based on a change in the position of the vehicle C.
  • An ignition switch 6 signal corresponding to the operation state of the ignition switch 6 is input to the input / output unit 15, and the vehicle-mounted control unit 11 receives the ignition switch 6 based on the ignition switch 6 signal input to the input / output unit 15. Can be recognized.
  • the positioning device 7 includes a GPS receiver.
  • the GPS receiver constitutes a GPS system together with an artificial satellite (GPS satellite), receives radio waves from the artificial satellite, and detects its own position.
  • the positioning device 7 outputs the current position information to the in-vehicle control unit 11 in response to the request from the in-vehicle control unit 11.
  • the door ECU 8 includes an actuator that drives a locking / unlocking device that locks and unlocks the vehicle door.
  • the vehicle-mounted device 1 detects the position of the portable device 9, authenticates the portable device 9, determines whether the portable device 9 is outside the vehicle,
  • a lock signal or an unlock signal is transmitted to the door ECU 8.
  • the vehicle equipment 1 detects the position of the portable device 9 when the ignition switch 6 is turned off and the vehicle door is opened and closed.
  • the in-vehicle device 1 transmits a locking signal to the door ECU 8.
  • the door ECU 8 drives the locking / unlocking device to lock the vehicle door. Further, the door ECU 8 can control the operation of the locking / unlocking device in accordance with the operation of the locking / unlocking switch in the vehicle, and can lock or unlock the vehicle door, and communicates information indicating the locking / unlocking state of the vehicle door. It can transmit to the vehicle equipment 1 via a line. The in-vehicle device 1 can recognize the locked / unlocked state of the vehicle door by receiving the information transmitted from the door ECU 8 at the input / output unit 15.
  • FIG. 3 is a block diagram showing a configuration example of the detection apparatus 2 according to the embodiment of the present invention.
  • the detection device 2 includes a sensor control unit (control unit) 21 that controls the operation of each component of the detection device 2.
  • a sensor storage unit 22, a sensor transmission unit (transmission unit) 23, a sensor reception unit (reception unit) 24, an air pressure detection unit 25, a temperature detection unit 26, and an acceleration sensor 27 are connected to the sensor control unit 21.
  • the sensor control unit 21 is a microcomputer having, for example, one or a plurality of CPUs, a multi-core CPU, a ROM, a RAM, an input / output interface, and the like.
  • the CPU of the sensor control unit 21 is connected to the sensor storage unit 22, the sensor transmission unit 23, the sensor reception unit 24, the air pressure detection unit 25, the temperature detection unit 26, and the acceleration sensor 27 via an input / output interface.
  • the sensor control unit 21 reads a control program stored in the sensor storage unit 22 and controls each unit.
  • the detection device 2 includes a battery (not shown) and operates with electric power from the battery.
  • the sensor storage unit 22 is a nonvolatile memory.
  • the sensor storage unit 22 stores a control program for the CPU of the sensor control unit 21 to perform processing related to detection and transmission of the air pressure of the tire 3. Further, a unique sensor identifier for identifying the own device and the other detection device 2 is stored.
  • An RF transmission antenna 23 a is connected to the sensor transmission unit 23.
  • the sensor transmission unit 23 modulates the air pressure signal generated by the sensor control unit 21 into a UHF band signal, and transmits the modulated air pressure signal using the RF transmission antenna 23a.
  • the sensor transmission part 23 transmits a predetermined signal continuously using RF transmission antenna 23a, when the air pressure of the tire 3 increases / decreases rapidly. For example, when the air filling of the tire 3 is performed, and the air pressure of the tire 3 is rapidly reduced, a predetermined signal is transmitted.
  • the sensor receiving unit 24 is connected to an LF receiving antenna 24a.
  • the sensor receiving unit 24 receives a signal transmitted from the vehicle-mounted device 1 using radio waves in the LF band by the LF receiving antenna 24 a and outputs the received signal to the sensor control unit 21.
  • the signal transmitted from the vehicle-mounted device 1 is, for example, a request signal for requesting air pressure information, a signal for instructing switching of the operation mode of the detection device 2, that is, a restriction signal, a release signal, or the like.
  • the air pressure detection unit 25 includes a diaphragm, for example, and detects the air pressure of the tire 3 based on the deformation amount of the diaphragm that changes depending on the magnitude of the pressure.
  • the air pressure detection unit 25 outputs a signal indicating the detected air pressure of the tire 3 to the sensor control unit 21.
  • the temperature detection unit 26 includes, for example, an element whose electric resistance changes with temperature, and detects the temperature of the tire 3 based on the voltage between the elements that changes with temperature change.
  • the temperature detection unit 26 outputs a signal indicating the detected temperature of the tire 3 to the sensor control unit 21.
  • the acceleration sensor 27 detects the acceleration applied to the detection device 2 by the rotation of the tire 3 and outputs an acceleration signal to the sensor control unit 21.
  • the sensor control unit 21 acquires the air pressure and temperature information of the tire 3 from the air pressure detection unit 25 and the temperature detection unit 26 according to the request signal by executing the control program, and sends the information to the air pressure, temperature and detection device 2.
  • a pneumatic signal including a unique sensor identifier or the like is generated and output to the sensor transmission unit 23.
  • the sensor control unit 21 when the tire 3 rotates and an acceleration signal is output from the acceleration sensor 27, the sensor control unit 21 generates an air pressure signal including air pressure, temperature, a sensor identifier unique to the detection device 2, and the like, and a sensor transmission unit To 23. Further, the sensor control unit 21 outputs a predetermined signal to the sensor transmission unit 23 when the air pressure of the tire 3 rapidly increases or decreases. However, when operating in a restriction mode that receives a restriction signal and restricts transmission of the predetermined signal, the sensor control unit 21 does not output the predetermined signal even if air filling or puncture of the tire 3 is detected. .
  • FIG. 4 is a block diagram showing a configuration example of the portable device 9 according to the embodiment of the present invention.
  • the portable device 9 includes a portable control unit 91 that controls the operation of each component of the portable device 9.
  • the portable side control unit 91 is a microcomputer having, for example, one or a plurality of CPUs, a multi-core CPU, and the like.
  • the portable side control unit 91 includes a portable side reception unit 92, a portable side transmission unit 93, a portable side storage unit 94, and a received signal strength measurement unit 95.
  • the portable side control unit 91 reads out a control program, which will be described later, stored in the portable side storage unit 94 and controls the operation of each component unit, thereby controlling the operation of each component unit.
  • the process which transmits the information required for the position detection of 9 to the vehicle equipment 1 is performed.
  • the portable storage unit 94 is a non-volatile memory similar to the storage unit 12.
  • the portable storage unit 94 transmits a response signal including information for detecting the position of the portable device 9 to the in-vehicle device 1 by the portable control unit 91 controlling the operation of each component of the portable device 9.
  • a control program for executing the processing to be performed is stored.
  • the portable-side receiving unit 92 is connected to the portable-side LF receiving antenna 92 a, receives various signals such as a position detection signal transmitted from the vehicle-mounted device 1 using radio waves in the LF band, and sends it to the portable-side control unit 91. Output.
  • the portable-side LF reception antenna 92a is, for example, a three-axis antenna, and a constant received signal strength can be obtained regardless of the orientation or posture of the portable device 9 with respect to the vehicle C.
  • the received signal strength measuring unit 95 detects the received signal strength of each position detection signal transmitted from the plurality of LF transmitting antennas 14a and received by the portable LF receiving antenna 92a, and the detected received signal strength is detected by the portable control unit.
  • 91 is a circuit that outputs the data to 91.
  • the portable side transmission unit 93 is connected to the portable side RF transmission antenna 93a, and transmits a signal corresponding to the signal transmitted from the portable device 9 according to the control of the portable side control unit 91.
  • the portable-side transmitter 93 receives information for detecting the position of the portable device 9 relative to the vehicle-mounted device 1 according to the control of the portable-side controller 91.
  • 95 transmits a response signal including the received signal strength measured.
  • the portable-side transmitter 93 transmits a response signal using UHF radio waves.
  • the UHF band is an example of a radio wave band for transmitting signals, and is not necessarily limited to this.
  • the in-vehicle device 1 can monitor the air pressure of the tire 3 by performing wireless communication with the detection device 2. Specifically, the in-vehicle device 1 transmits a request signal from the LF transmission antenna 14a at an arbitrary timing, and receives an air pressure signal transmitted from the detection device 2 in response to the request signal, whereby the air pressure of each tire 3 is received. Can be detected and monitored. While the vehicle C is traveling, an air pressure signal is spontaneously transmitted from the detection device 2, and the vehicle-mounted device 1 monitors the air pressure of each tire 3 by receiving the air pressure signal transmitted from each detection device 2. can do.
  • a predetermined signal is transmitted from the detection device 2, and the in-vehicle device 1 receives the predetermined signal, thereby filling the air pressure of the tire 3; A puncture or the like can be detected, and the abnormality can be notified using the notification device 4.
  • the vehicle-mounted device 1 detects the position of the portable device 9 at a required timing such as when the request switch is operated, when the engine start button is operated, when the vehicle door is opened and closed after the engine stops, Depending on the position of the machine 9, predetermined processing such as locking / unlocking of the vehicle door, engine starting, and the like is executed.
  • FIG. 5 and 6 are flowcharts showing a processing procedure related to switching of the operation mode of the detection apparatus 2
  • FIG. 7 is a timing chart showing a method of switching the operation mode of the detection apparatus 2.
  • Vehicle state indicates whether the vehicle C is in a parked state, a stopped state, or a traveling state.
  • IG switch state indicates whether the ignition switch 6 is in an on state or an off state.
  • Switchching signal indicates the transmission timing of a switching signal such as a restriction signal and a release signal transmitted from the on-vehicle device 1.
  • a rectangular block with hatching indicates a switching signal for instructing switching to a restriction mode that restricts transmission of a predetermined signal that is transmitted when the tire pressure rapidly increases and decreases. The switching signal which instruct
  • the “TPMS radio signal (detection device)” indicates the operation mode of the detection device 2. For example, “only the trigger response pneumatic signal” indicated by hatching indicates a restriction mode in which transmission of a predetermined signal is restricted and a pneumatic signal is transmitted only when there is a request from the vehicle-mounted device 1. A white portion indicates an unrestricted mode in which transmission of a predetermined signal is not restricted.
  • “Wireless signal for locking / unlocking (portable device)” is a response signal transmitted from the portable device 9 in the process of wireless communication with the in-vehicle device 1 such as locking / unlocking of the vehicle door, confirmation of the presence / absence of the portable device 9 while traveling It is shown that.
  • the “key operation radio signal (portable device)” indicates that a signal is transmitted from the portable device 9 by a locking / unlocking operation of the vehicle door using the portable device 9.
  • the detection device 2 when the ignition switch 6 is switched from the off state to the on state, the detection device 2 is switched to the unrestricted mode.
  • the detection device 2 When a predetermined time has elapsed since the ignition switch 6 was switched on, the detection device 2 is switched to the restriction mode, and when the vehicle C starts traveling, the detection device 2 is switched to the non-restriction mode again. Finally, when the vehicle C stops and the ignition switch 6 is turned off, the detection device 2 is switched to the restriction mode again.
  • wireless communication with the portable device 9 is important, such as operating the detection device 2 in an unrestricted mode and locking and unlocking the vehicle door. In such a situation, interference between the signal transmitted from the portable device 9 and the signal transmitted from the detection device 2 can be suppressed by setting the detection device 2 in the restriction mode.
  • the vehicle-mounted control unit 11 of the vehicle-mounted device 1 monitors the operation state of the ignition switch 6 and determines whether or not the ignition switch 6 has changed from the off state to the on state (step S11). When it determines with the ignition switch 6 being an OFF state (step S11: NO), the vehicle-mounted control part 11 returns a process to step S11, and waits.
  • step S11 When it is determined that the ignition switch 6 has changed from the off state to the on state (step S11: YES), the in-vehicle control unit 11 transmits a switching signal instructing switching to the non-restricted mode, that is, a release signal to the in-vehicle transmission unit 14. (Step S12).
  • the detection apparatus 2 that has received the release signal shifts from the restricted mode to the non-restricted mode.
  • vehicle-mounted control part 11 detects and monitors the air pressure of each tire 3 by performing radio
  • step S14 determines whether or not a predetermined time has elapsed after instructing the switching to the non-restricted mode.
  • step S14 determines whether or not a predetermined time has elapsed after instructing the switching to the non-restricted mode.
  • the vehicle-mounted control unit 11 determines whether or not the detection device 2 is currently in the non-restricted mode (step S15). When it determines with it being in non-restriction mode (step S15: YES), the vehicle-mounted control part 11 transmits the switching signal which instruct
  • step S16 When the process of step S16 is completed, when it is determined that it is not the non-restricted mode (step S15: NO), the in-vehicle control unit 11 acquires a signal from the vehicle speed sensor 5 and determines whether or not the vehicle C is traveling. Is determined (step S17). When it determines with the vehicle C not driving
  • the in-vehicle control unit 11 causes the in-vehicle transmission unit 14 to transmit a switching signal for instructing switching to the non-restricted mode (step S18). ).
  • the detection apparatus 2 that has received the release signal shifts to the non-restricted mode.
  • the vehicle-mounted control part 11 detects and monitors the air pressure of each tire 3 by performing radio
  • the vehicle-mounted control unit 11 determines whether or not the ignition switch 6 has changed from the on state to the off state (step S20). When it determines with the ignition switch 6 being an ON state (step S20: NO), the vehicle-mounted control part 11 returns a process to step S19, and continues monitoring of a tire air pressure.
  • the in-vehicle control unit 11 causes the in-vehicle transmission unit 14 to transmit a switching signal that instructs switching to the restriction mode, that is, the restriction signal. (Step S21), the process ends.
  • the detection device 2 is in the non-restricted mode for a predetermined time, and air pressure monitoring has priority. That is, the in-vehicle device 1 can monitor the air filling of the tire 3 and the rapid increase / decrease state of the tire air pressure.
  • the predetermined time When the predetermined time has elapsed, the importance of air pressure monitoring decreases, so that the detection device 2 enters the restriction mode, and transmission of the predetermined signal from the portable device 9 is suppressed. In this state, interference between the signal transmitted from the detection device 2 and the signal transmitted from the portable device 9 is suppressed.
  • the detection device 2 is switched to the non-restricted mode, and it becomes possible to monitor a rapid increase / decrease in tire pressure.
  • the importance of wireless communication with the portable device 9 is higher than the monitoring of the air pressure, so that the detection device 2 is in the non-restricted mode and transmitted from the detection device 2 Interference between the transmitted signal and the signal transmitted from the portable device 9 is suppressed.
  • the detection device 2 shifts to the non-restricted mode when the ignition switch 6 is switched from the off state to the on state.
  • the vehicle-mounted device 1 may be configured to transmit a release signal.
  • the in-vehicle device 1 stores a specific position where the tire 3 may be filled with air, such as a gas station or a home.
  • the in-vehicle device 1 transmits a release signal to the detection device 2 by the in-vehicle transmission unit 14 and the position of the vehicle C is not the specific position.
  • the release signal is not transmitted, and the detection device 2 is left in the restriction mode.
  • the detection device 2 is operated in the restriction mode. By doing so, interference between the signal transmitted from the detection device 2 and the signal transmitted from the portable device 9 can be effectively suppressed.
  • In-vehicle device (monitoring device) 2 Detection Device 3 Tire 4 Notification Device 5 Vehicle Speed Sensor 6 Ignition Switch 7 Positioning Device 8 Door ECU DESCRIPTION OF SYMBOLS 9 Portable machine 11 Car-mounted control part 12 Memory

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Tires In General (AREA)

Abstract

La présente invention comprend : une unité de transmission pour transmettre en continu un signal prédéterminé à un dispositif de détection lorsque le taux d'augmentation/diminution de pression d'air de pneu est supérieur ou égal à une valeur de seuil, le dispositif de détection détectant la pression d'air d'un pneu prévu dans un véhicule et transmettant un signal de pression d'air comprenant des informations sur la pression d'air détectée, lorsqu'un signal de requête est reçu; une unité de réception pour recevoir un signal de restriction qui ordonne la restriction de transmission du signal prédéterminé; et une unité de commande pour restreindre la transmission, par l'unité de transmission, du signal prédéterminé lorsque l'unité de réception reçoit le signal de restriction.
PCT/JP2018/016388 2017-05-12 2018-04-23 Dispositif de détection et système de surveillance de la pression d'air de pneu WO2018207596A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-095799 2017-05-12
JP2017095799A JP2018192839A (ja) 2017-05-12 2017-05-12 検出装置及びタイヤ空気圧監視システム

Publications (1)

Publication Number Publication Date
WO2018207596A1 true WO2018207596A1 (fr) 2018-11-15

Family

ID=64104437

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/016388 WO2018207596A1 (fr) 2017-05-12 2018-04-23 Dispositif de détection et système de surveillance de la pression d'air de pneu

Country Status (2)

Country Link
JP (1) JP2018192839A (fr)
WO (1) WO2018207596A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7424249B2 (ja) * 2020-08-28 2024-01-30 株式会社デンソー タイヤ空気圧監視システム

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003081059A (ja) * 2001-09-13 2003-03-19 Alps Electric Co Ltd タイヤ圧モニタを兼ねたキーレスエントリー装置
JP2005157511A (ja) * 2003-11-21 2005-06-16 Toyota Motor Corp 車両における情報処理装置および車輪情報処理装置
JP2007076457A (ja) * 2005-09-13 2007-03-29 Denso Corp タイヤ空気圧検出装置
JP2012101707A (ja) * 2010-11-11 2012-05-31 Tokai Rika Co Ltd 車載通信機
JP2013043535A (ja) * 2011-08-24 2013-03-04 Honda Motor Co Ltd スマートキーシステムとタイヤ空気圧監視システムとを備えた車両の車載装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003081059A (ja) * 2001-09-13 2003-03-19 Alps Electric Co Ltd タイヤ圧モニタを兼ねたキーレスエントリー装置
JP2005157511A (ja) * 2003-11-21 2005-06-16 Toyota Motor Corp 車両における情報処理装置および車輪情報処理装置
JP2007076457A (ja) * 2005-09-13 2007-03-29 Denso Corp タイヤ空気圧検出装置
JP2012101707A (ja) * 2010-11-11 2012-05-31 Tokai Rika Co Ltd 車載通信機
JP2013043535A (ja) * 2011-08-24 2013-03-04 Honda Motor Co Ltd スマートキーシステムとタイヤ空気圧監視システムとを備えた車両の車載装置

Also Published As

Publication number Publication date
JP2018192839A (ja) 2018-12-06

Similar Documents

Publication Publication Date Title
JP5186475B2 (ja) キーレスエントリー機能を備えたタイヤ状態監視装置
JP5402058B2 (ja) 携帯機、携帯通信端末、および車両システム
US20180304702A1 (en) On-board device and vehicle communication system
JP4140731B2 (ja) 車両用通信装置
US10279634B2 (en) Vehicular communication system and in-vehicle communication apparatus
WO2017065039A1 (fr) Dispositif de mémorisation embarqué et système de mémorisation embarqué
WO2019087822A1 (fr) Dispositif de commande de communication de charge, machine embarquée, système de commande de communication de charge et procédé de commande de communication de charge
US10137858B2 (en) Vehicle-mounted device
JP4213719B2 (ja) 車載機器遠隔制御装置
WO2017069103A1 (fr) Dispositif de surveillance et système de surveillance de la pression d'air de pneu
WO2018216462A1 (fr) Système de détection de pression d'air de pneu
JP5593453B2 (ja) 車両の制御装置
WO2018207596A1 (fr) Dispositif de détection et système de surveillance de la pression d'air de pneu
JP2020001573A (ja) タイヤ空気圧監視システム及びタイヤ空気圧監視方法
JP2004268612A (ja) タイヤ空気圧監視システム
JP2020100994A (ja) 車載装置
JP2017109727A (ja) タイヤ空気圧監視システム、検出装置及び監視装置
WO2017104550A1 (fr) Système de suivi de pression de pneu, dispositif de suivi et dispositif de détection
JP2012101708A (ja) 車載通信機
JP6673155B2 (ja) 車両用通信システム及び車載機
WO2017188025A1 (fr) Système de surveillance de pression de pneu et dispositif de surveillance
JP2012101709A (ja) 車載通信機
JP5587741B2 (ja) 車載通信機
WO2018056115A1 (fr) Système de surveillance et dispositif de surveillance de pression d'air de pneu
US11243303B2 (en) Portable terminal position detection apparatus

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18797543

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18797543

Country of ref document: EP

Kind code of ref document: A1