WO2016103453A1 - タイヤ状態監視システム - Google Patents
タイヤ状態監視システム Download PDFInfo
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- WO2016103453A1 WO2016103453A1 PCT/JP2014/084534 JP2014084534W WO2016103453A1 WO 2016103453 A1 WO2016103453 A1 WO 2016103453A1 JP 2014084534 W JP2014084534 W JP 2014084534W WO 2016103453 A1 WO2016103453 A1 WO 2016103453A1
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- tire
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Classifications
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- 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
- B60C23/0401—Signalling devices actuated by tyre pressure mounted on the wheel or tyre characterised by the type of alarm
- B60C23/0406—Alarms noticeable from outside the vehicle, e.g. indication in side mirror, front light or audible alarms
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- 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
- B60C23/0447—Wheel or tyre mounted circuits
- B60C23/0455—Transmission control of wireless signals
- B60C23/0464—Transmission control of wireless signals to avoid signal interference
- B60C23/0466—Transmission control of wireless signals to avoid signal interference with signals sent by transmitters mounted on adjacent vehicles
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- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
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- 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
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- 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
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- 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
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- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/50—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking
- B60Q1/525—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking automatically indicating risk of collision between vehicles in traffic or with pedestrians, e.g. after risk assessment using the vehicle sensor data
- B60Q1/535—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking automatically indicating risk of collision between vehicles in traffic or with pedestrians, e.g. after risk assessment using the vehicle sensor data to prevent rear-end collisions, e.g. by indicating safety distance at the rear of the vehicle
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- 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
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- 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
- B60C23/06—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
- B60C23/061—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle by monitoring wheel speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/50—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking
- B60Q1/543—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking for indicating other states or conditions of the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/172—Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
- B60T8/1725—Using tyre sensors, e.g. Sidewall Torsion sensors [SWT]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/14—Adaptive cruise control
Definitions
- the present invention relates to a tire condition monitoring system, and more particularly to a tire condition monitoring system capable of preventing a collision of a following vehicle with the own vehicle.
- a tire condition monitoring system for monitoring a tire condition quantity (for example, air pressure, temperature, etc.) of a pneumatic tire.
- the tire condition monitoring system includes a tire condition acquisition device that is disposed in a hollow portion of a pneumatic tire and acquires a tire condition quantity (for example, air pressure, temperature, etc.), and receives a radio wave from the tire condition acquisition device to receive the tire condition. And a monitoring device for monitoring the quantity.
- a collision prevention system that prevents a subsequent vehicle from colliding with the host vehicle.
- the conventional collision prevention system when the distance between the own vehicle and the following vehicle is narrow or when the following vehicle is approaching the own vehicle, a warning is issued from the own vehicle to the following vehicle. To alert the driver of the future. As a result, it is possible to prompt the subsequent vehicle to take appropriate measures such as ensuring a sufficient inter-vehicle distance from the own vehicle, and to prevent a collision accident with the own vehicle from the subsequent vehicle.
- Patent Documents 1 to 3 are known.
- An object of the present invention is to provide a tire condition monitoring system that can prevent a subsequent vehicle from colliding with the host vehicle.
- a tire condition monitoring system includes a plurality of tire condition acquisition devices that are installed in a plurality of tires of a host vehicle and acquire a tire condition quantity, and a plurality of tire condition acquisition devices.
- a monitoring device that receives each output signal and performs a predetermined process; and a warning device that issues a warning toward the following vehicle; and when the monitoring device has a predetermined abnormality in the tire state quantity, The warning device is operated.
- the monitoring apparatus when there is an abnormality in the tire condition quantity, the monitoring apparatus operates the warning device to give a warning toward the following vehicle. Accordingly, there is an advantage that a warning to the following vehicle is appropriately performed in a situation where the traveling state of the own vehicle may become unstable, and the collision of the following vehicle to the own vehicle is prevented.
- FIG. 1 is a configuration diagram showing a tire condition monitoring system according to an embodiment of the present invention.
- FIG. 2 is a block diagram showing a tire condition acquisition device of the tire condition monitoring system shown in FIG.
- FIG. 3 is a block diagram showing a monitoring device and a warning device of the tire condition monitoring system shown in FIG. 4 is a block diagram illustrating a storage unit of the monitoring device illustrated in FIG.
- FIG. 5 is a flowchart showing the operation of the tire condition monitoring system shown in FIG.
- FIG. 6 is an explanatory view showing the operation of the tire condition monitoring system shown in FIG.
- FIG. 7 is an explanatory view showing the operation of the tire condition monitoring system shown in FIG.
- FIG. 8 is a flowchart showing the operation of the first modification of the tire condition monitoring system shown in FIG. FIG.
- FIG. 9 is an explanatory view showing the operation of the first modification of the tire condition monitoring system shown in FIG.
- FIG. 10 is an explanatory view showing the operation of the first modification of the tire condition monitoring system shown in FIG.
- FIG. 11 is a flowchart showing the operation of the second modification of the tire condition monitoring system shown in FIG.
- FIG. 12 is an explanatory view showing the operation of the second modification of the tire condition monitoring system shown in FIG.
- FIG. 13 is a flowchart showing the operation of the third modification of the tire condition monitoring system shown in FIG.
- FIG. 14 is an explanatory view showing the operation of the third modification of the tire condition monitoring system shown in FIG.
- FIG. 1 is a configuration diagram showing a tire condition monitoring system according to an embodiment of the present invention.
- FIG. 1 schematically shows the configuration of the host vehicle 100 equipped with the tire condition monitoring system 10.
- FIG. 2 is a block diagram showing a tire condition acquisition device of the tire condition monitoring system shown in FIG.
- the tire condition monitoring system 10 is a system that monitors the amount of tire condition of the pneumatic tire 110.
- the tire state quantity refers to, for example, air pressure and temperature in the tire lumen, acceleration acting on the tire, and the like.
- a TPMS Transire Pressure Monitoring System
- the tire condition monitoring system 10 is particularly preferably mounted on a vehicle having six or more wheels such as a truck, a bus, and a trailer.
- the own vehicle 100 is a 2 ⁇ 2 ⁇ 4D ⁇ 4D (front 2 wheels, 2 wheels—rear 4 drive wheels, 4 drive wheels) truck, and a pneumatic tire 110 is mounted on each wheel.
- a pneumatic tire 110 is mounted on each wheel.
- the tire condition monitoring system 10 includes a tire condition acquisition device 20, a monitoring device 30, and a warning device 40 (see FIGS. 1 to 3).
- the tire state acquisition device 20 is a device that acquires or detects the tire state amount of the pneumatic tire 110. Moreover, the tire state acquisition apparatus 20 is installed in all the pneumatic tires 110 of the own vehicle 100, respectively (refer FIG. 1).
- the tire state acquisition device 20 includes a sensor unit 21, a processing unit 22, a transmitter 23, an antenna 24, and a power supply unit 25 (see FIG. 2).
- the sensor unit 21 includes an air pressure sensor 211 that detects and outputs a tire air pressure, and an A / D converter 212 that performs analog / digital conversion on an output signal of the air pressure sensor 211 and outputs the converted signal.
- the processing unit 22 generates, for example, predetermined air pressure data based on an output signal from the air pressure sensor 211 by reading and executing a predetermined program from the storage unit 221 and storing the predetermined program. And a central processing unit 222 for outputting.
- the transmitter 23 generates an oscillation circuit 231 that generates and outputs a carrier wave signal, a modulation circuit 232 that modulates and outputs a carrier wave signal from the oscillation circuit 231 based on an output signal from the central processing unit 222, and a modulation circuit 232.
- an amplifier circuit 233 for amplifying the output signal from the output.
- the antenna 24 is connected to the amplifier circuit 233 of the transmitter 23.
- the power supply unit 25 is, for example, a secondary battery, and supplies power to the tire state acquisition device 20.
- the monitoring device 30 is a device that monitors a tire state amount acquired by the tire state acquisition device 20 and performs a predetermined process.
- the monitoring device 30 includes a reception unit 31, an antenna 32, a reception buffer 33, a storage unit 34, a central processing unit 35, an operation unit 361 and a switch 362, a display control unit 37, and an in-vehicle display unit 38.
- the power supply unit 39, the following vehicle sensor 310, and the warning device control unit 311 are included (see FIG. 3).
- the receiving unit 31 receives a wireless signal related to the air pressure data (tire amount) from the tire condition acquisition device 20 via the antenna 32, and extracts and outputs the air pressure data and the identification information data.
- the antenna 32 is connected to the receiving unit 31.
- the reception buffer 33 temporarily stores the air pressure data and the identification information data from the reception unit 31.
- the storage unit 34 stores a predetermined program, a communication method table with the tire condition acquisition device 20, and the like.
- the central processing unit 35 reads a predetermined program from the storage unit 34 and executes it to perform predetermined processing based on the air pressure data and the identification information data from the reception buffer 33.
- This process includes, for example, a process for determining an abnormality in tire air pressure, a process for generating a determination result, and a process for displaying the determination result on the in-vehicle display unit 38.
- the operation unit 361 is an input unit for inputting various information to the monitoring device 30.
- the switch 362 is an ON / OFF switch for starting the monitoring device 30.
- the display control unit 37 controls the display content of the in-vehicle display unit 38 based on the output signal from the central processing unit 35.
- the in-vehicle display unit 38 is disposed, for example, in the driver's seat of the host vehicle 100 and displays predetermined display contents.
- the power supply unit 39 is, for example, a battery of the host vehicle 100 and supplies power to the monitoring device 30.
- the subsequent vehicle sensor 310 acquires information necessary for calculating the approach degree P of the subsequent vehicle 200 described later.
- an inter-vehicle distance sensor or a relative speed sensor that measures an inter-vehicle distance or a relative speed between the host vehicle 100 and the following vehicle 200 can be employed. These sensors include, for example, a millimeter wave radar, an infrared radar, a Doppler radar, and the like, irradiate a sensor signal toward the rear of the own vehicle 100, receive a reflected wave from the following vehicle 200, and A signal corresponding to the inter-vehicle distance or relative speed with the following vehicle 200 is output. Further, an image sensor can be adopted as the subsequent vehicle sensor 310. This image sensor images the back of the host vehicle 100 and outputs image information relating to the following vehicle 200. Based on these output signals, an approach degree P of the following vehicle 200 described later can be calculated.
- the warning device control unit 311 controls driving of a warning device 40 which will be described later.
- the storage unit 34 of the monitoring device 30 stores various programs 341 to 345 and data 346 (see FIG. 4).
- the various programs 341 to 345 include an abnormality determination program 341 that determines whether or not an abnormality has occurred in the tire state quantity, an approach degree calculation program 342 that calculates an approach degree P of the following vehicle 200, and the following vehicle 200.
- An identification program 345 is included.
- the various data 346 includes sensor ID registration data 346 in which the sensor ID of the tire condition acquisition device 20 is associated with the tire mounting position.
- the warning device 40 is a device that issues a warning from the own vehicle 100 toward the following vehicle 200.
- a lamp unit 41 (see FIG. 1) installed at a position (for example, the rear portion of the host vehicle 100) that is visible from the following vehicle 200, and outputs sound toward the rear of the host vehicle 100.
- a speaker unit (not shown), a display unit (not shown) installed at a position where it can be seen from the following vehicle 200 and displaying characters, figures, symbols, and the like can be adopted.
- a warning is given from the own vehicle 100 to the following vehicle 200 by a warning lighting operation of the lamp unit 41, a warning sound output of the speaker unit, or display of predetermined warning information by the display unit. Done.
- the inter-vehicle communication unit includes a communication device 42 (see FIG. 1) mounted on the host vehicle 100 and a communication device 201 (see FIG. 7 described later) mounted on the succeeding vehicle 200.
- the communication device 42 of the host vehicle 100 mainly functions as a transmitter
- the communication device 201 of the following vehicle 200 mainly functions as a receiver.
- the communication device 42 of the own vehicle 100 transmits predetermined information related to the warning to the communication device 201 of the subsequent vehicle 200, whereby the warning from the own vehicle 100 to the subsequent vehicle 200 is performed.
- the communication device 201 of the following vehicle 200 may be a communication device of a dedicated inter-vehicle communication unit mounted on the following vehicle 200, for example, a portable information terminal (for example, a vehicle that is brought into the following vehicle 200). It may be a smartphone or tablet terminal installed with an inter-vehicle communication application.
- the warning device 40 may be an existing lamp unit mounted on the own vehicle 100.
- a lamp unit for example, rear combination lamps mounted on the left and right of the rear of the host vehicle 100 can be employed.
- the rear combination lamp includes a stop lamp, a tail lamp, a turn signal lamp, a back lamp, and the like.
- a warning is given from the own vehicle 100 to the following vehicle 200 by simultaneously blinking the turn signal lamps at the rear left and right.
- the tire condition acquisition device 20 is installed on the tires 110 of all the wheels of the host vehicle 100 (see FIG. 1), and detects the air pressure of each tire 110 as a tire condition quantity.
- the sensor unit 21 the air pressure sensor 211 detects the tire state amount of the tire 110 (the air pressure in the tire lumen)
- the processing unit 22 includes the sensor unit 21.
- Output data is generated based on the output signal.
- the transmitter 23 generates an output signal based on the output data of the processing unit 22 and wirelessly transmits this output signal to the monitoring device 30 via the antenna 24.
- the output signal concerning the tire state amount of each tire 110 is transmitted from each tire state acquisition device 20 to the monitoring device 30.
- a unique sensor ID of the tire condition acquisition device 20 is attached to each output signal.
- the monitoring device 30 acquires the output signal of each tire condition acquisition device 20 via the antenna 32 of the receiving unit 31. Further, the central processing unit 35 generates predetermined display data regarding the tire state quantity of each tire 110 based on each output signal, and the display control unit 37 displays this display data on the in-vehicle display unit 38. Thereby, the predetermined information regarding the tire state quantity of each tire 110 is displayed on the in-vehicle display unit 38 and notified to the driver of the host vehicle 100. Specifically, the driver of the vehicle 100 can confirm the tire state quantity of each tire 110 by operating the operation unit 361 of the monitoring device 30 to display desired tire information on the in-vehicle display unit 38.
- the monitoring device 30 monitors the abnormality of the tire state quantity of each tire 110 in real time.
- the central processing unit 35 reads the abnormality determination program 341 from the storage unit 34 and executes it to determine whether an abnormality has occurred in the tire state quantities of the respective tires 110. For example, when the air pressure of a certain tire 110 is less than or equal to a predetermined threshold value or when it suddenly drops in a short time, the central processing unit 35 determines that an abnormality has occurred in the tire 110. Then, the central processing unit 35 causes the in-vehicle display unit 38 to display information related to the tire state quantity of each tire 110 based on the determination result.
- a warning indicating an abnormality such as a decrease in air pressure or occurrence of puncture of the tire 110 is displayed together with information on the mounting position of the tire 110 (warning display on the in-vehicle display unit 38). Accordingly, a warning indicating that an abnormality has occurred in the tire state quantity of each tire 110 is appropriately given to the driver of the host vehicle 100.
- This warning is given by, for example, a blinking display of tire information on the in-vehicle display unit 38 or a warning sound.
- the tire condition acquisition device 20 includes the air pressure sensor 211 that measures the air pressure in the tire lumen (see FIG. 2), and the monitoring device 30 converts the air pressure in the tire lumen to the tire state quantity. And predetermined tire information is displayed on the in-vehicle display unit 38.
- the present invention is not limited to this, and the tire state quantity can be appropriately selected within a range obvious to those skilled in the art.
- the tire condition acquisition device 20 has a temperature sensor that measures the temperature of the tire lumen (not shown), and the monitoring device 30 monitors the temperature of the tire lumen as a tire condition quantity and displays it in the vehicle Predetermined information may be displayed on the part 38.
- the monitoring device 30 determines that an abnormality has occurred in the tire 110 when the temperature of a certain tire 110 is equal to or higher than a predetermined threshold or when the temperature rapidly increases, and the predetermined value is displayed on the in-vehicle display unit 38. Display information of.
- the tire condition acquisition device 20 includes an acceleration sensor that measures acceleration acting on the tire (not shown), and the monitoring device 30 monitors the acceleration acting on the tire as a tire condition quantity, and displays in the vehicle. Predetermined information may be displayed on the part 38.
- the acceleration sensor measures the acceleration acting in the tire axial direction, and when the acceleration is equal to or greater than a predetermined threshold, it is estimated that the tire 110 is in a skidding state, and it is determined that an abnormality has occurred in the tire 110.
- a technique described in Japanese Patent Application Laid-Open No. 2007-121274 is known.
- the tire condition monitoring system 10 employs the following configuration in order to prevent a collision accident of the following vehicle 200 with the host vehicle 100.
- the following vehicles are not limited to passenger cars, trucks, buses and the like, but also include motorcycles such as motorcycles.
- the following vehicle is not limited to a rear vehicle that travels in the same lane with respect to the travel path of the host vehicle, but includes a rear vehicle that travels in a lane adjacent to the travel path of the host vehicle.
- it is assumed to prevent a collision between the own vehicle and a succeeding vehicle that changes the lane from an adjacent lane and enters the traveling path of the own vehicle.
- the own vehicle changes lanes, it is assumed that a collision between the following vehicle traveling in this lane and the own vehicle is prevented.
- the following vehicle is not limited to a rear vehicle that travels immediately after the host vehicle, and further includes a vehicle that travels behind the subsequent vehicle.
- a succeeding vehicle that travels immediately after the host vehicle and one or more succeeding vehicles that travel behind it, it is possible to prevent a collision between the following vehicles or a so-called ball hitting accident.
- FIG. 5 and 6 are a flowchart (FIG. 5) and an explanatory diagram (FIG. 6) showing the operation of the tire condition monitoring system shown in FIG.
- FIG. 6 shows the operating conditions of the warning device 40.
- the operation of the tire condition monitoring system 10 will be described along the flowchart of FIG.
- step ST11 the monitoring device 30 acquires the output signal of each tire state acquisition device 20. That is, when the host vehicle 100 is traveling, each tire state acquisition device 20 measures the tire state amount of each tire 110 at a predetermined sampling period and wirelessly transmits an output signal to the monitoring device 30 as described above. ing. And the monitoring apparatus 30 has received the output signal of each tire condition acquisition apparatus 20, and has acquired the measurement data regarding the tire condition quantity of each tire 110. After step ST11, the process proceeds to step ST12.
- step ST12 the monitoring device 30 acquires the output signal of the following vehicle sensor 310. That is, when the host vehicle 100 is traveling, the following vehicle sensor 310 measures and outputs the inter-vehicle distance or relative speed with the following vehicle 200 at a predetermined sampling period. And the central processing part 35 of the monitoring apparatus 30 has acquired these output signals. After step ST12, the process proceeds to step ST13.
- step ST13 the monitoring device 30 calculates the approach degree P of the succeeding vehicle 200 with respect to the own vehicle 100.
- the approach degree P is a numerical value corresponding to the inter-vehicle distance or relative speed between the own vehicle 100 and the following vehicle 200. The larger the value, the narrower the inter-vehicle distance between the own vehicle 100 and the following vehicle 200, or the own vehicle. This means that the approach speed of the succeeding vehicle 200 with respect to 100 is fast.
- the central processing unit 35 of the monitoring device 30 reads and executes the approach degree calculation program 342 from the storage unit 34 and executes the subsequent vehicle 200 based on the output signal of the subsequent vehicle sensor 310 acquired in step ST12. Is calculated. After step ST13, the process proceeds to step ST14.
- the monitoring device 30 converts the output signals of these sensors to calculate the approaching degree P of the following vehicle 200.
- the subsequent vehicle sensor 310 is an image sensor that captures the rear of the host vehicle 100
- the monitoring device 30 performs image processing on the output signal of the image sensor to extract image information regarding the subsequent vehicle 200, and By comparing the image information of the following vehicle 200 at the sampling time, the approaching degree P of the following vehicle 200 is calculated.
- step ST14 the monitoring device 30 determines whether or not an abnormality has occurred in the tire state quantity.
- the central processing unit 35 of the monitoring device 30 reads and executes the abnormality determination program 341 from the storage unit 34 and executes the output signal of each tire condition acquisition device 20 acquired in step ST11 and a predetermined threshold value. Based on the comparison result, it is determined whether or not an abnormality has occurred in the tire state quantity of each tire 110.
- This process is the same as the warning display process on the vehicle interior display unit 38 described above.
- the traveling state of the host vehicle 100 becomes unstable and, for example, a decrease in traveling speed or a meandering operation may occur. If an affirmative determination is made in step ST14, the process proceeds to step ST15, and if a negative determination is made, the process proceeds to step ST17.
- step ST15 the monitoring device 30 determines whether or not the approach degree P is equal to or greater than the threshold value k1. Specifically, the central processing unit 35 of the monitoring device 30 reads and executes the approach determination program 343 from the storage unit 34, and executes the approach P of the succeeding vehicle 200 calculated in step ST13 and the predetermined threshold k1. Are compared and the above-described comparison determination is performed.
- k1 ⁇ P the distance between the own vehicle 100 and the following vehicle 200 is narrow, or the approaching speed of the following vehicle 200 with respect to the own vehicle 100 is high, so that the following vehicle 200 collides with the own vehicle 100. It can be said that the situation is likely to occur. If an affirmative determination is made in step ST15, the process proceeds to step ST16, and if a negative determination is made, the process proceeds to step ST17.
- step ST16 the monitoring device 30 operates the warning device 40.
- the central processing unit 35 of the warning device 40 drives and controls the warning device 40 via the warning device control unit 311 by reading and executing the warning device control program 344 from the storage unit 34.
- the warning device 40 is driven when there is an abnormality in the tire state quantity (positive determination in step ST14) and the degree of approach P of the following vehicle 200 is large (positive determination in step ST15). Is done. Then, when the warning device 40 issues a warning toward the following vehicle 200, the driver of the following vehicle 200 is alerted, and a collision accident with the own vehicle 100 by the following vehicle 200 is prevented. After this step ST16, the process is terminated, and the process returns to step ST11.
- step ST17 the monitoring device 30 stops the warning device 40. Specifically, the warning device control unit 311 of the monitoring device 30 controls the driving of the warning device 40, so that the warning device 40 ends the warning to the following vehicle 200 and returns to the initial state. After this step ST17, the process is terminated, and the process returns to step ST11.
- FIG. 7 is an explanatory view showing the operation of the tire condition monitoring system shown in FIG. This figure shows a specific example of the operation of the warning device 40.
- each tire state acquisition device 20 measures the tire state amount of each tire 110 at a predetermined sampling period, and wirelessly transmits an output signal to the monitoring device 30.
- the following vehicle sensor 310 measures and outputs an inter-vehicle distance or relative speed with the following vehicle 200 at a predetermined sampling period.
- the monitoring apparatus 30 has received the output signal of each tire condition acquisition apparatus 20, and the output signal of the following vehicle sensor 310 (step ST11 and ST12 of FIG. 5). Further, the monitoring device 30 determines the operating condition (see FIG. 6) of the warning device 40 based on these output signals (steps ST14 and ST15).
- step ST15 when the inter-vehicle distance between the own vehicle 100 and the following vehicle 200 is sufficient (P ⁇ k1: negative determination in step ST15), or an abnormality in the tire state quantity occurs in any of the tires 110. If not (No in step ST14), it is difficult for a collision accident caused by the following vehicle 200 to occur. For this reason, the warning device 40 stops (step ST17), and the warning from the own vehicle 100 to the succeeding vehicle 200 is not performed (see FIG. 6). Specifically, the lamp unit 41 which is the warning device 40 is turned off, and the communication device 42 of the vehicle-to-vehicle communication unit stops sending warning information.
- the inter-vehicle distance between the host vehicle 100 and the following vehicle 200 is narrow (k1 ⁇ P: affirmative determination in step ST15), and an abnormality in the tire state quantity has occurred in one of the tires 110. If the vehicle is present (affirmative determination in step ST14), the traveling state of the host vehicle 100 may become unstable, and a collision accident may occur due to the following vehicle 200. For this reason, the warning device 40 is driven (step ST16), and a warning is given from the own vehicle 100 to the following vehicle 200 (see FIG. 6).
- the lamp unit 41 which is the warning device 40 is turned on, and the communication device 42 of the inter-vehicle communication unit transmits predetermined warning information to the following vehicle 200, and the communication device 201 of the following vehicle 200
- the warning information from the own vehicle 100 is received and the driver of the following vehicle 200 is warned.
- the driver of the following vehicle 200 is alerted, and a collision accident caused by the following vehicle 200 is prevented.
- step ST15 when there is a sufficient inter-vehicle distance between own vehicle 100 and subsequent vehicle 200 (P ⁇ k1: negative determination in step ST15), and any tire 110
- the warning device 40 stops (step ST17), and the own vehicle 100 changes to the succeeding vehicle 200. Warning is prohibited.
- Such a configuration is preferable in that the occurrence of warnings from the own vehicle 100 to the succeeding vehicle 200 is suppressed, so that the driver's discomfort and annoyance of the following vehicle 200 are reduced.
- the present invention is not limited to this, and if a tire state quantity abnormality has occurred in any of the tires 110, even if the distance between the host vehicle 100 and the following vehicle 200 is sufficient, a warning is given.
- the device 40 may be driven to issue a warning from the own vehicle 100 to the following vehicle 200 (not shown). As a result, a warning can be given to the following vehicle 200 from the initial stage where the risk of collision is relatively low, so that a collision accident by the following vehicle 200 can be effectively prevented.
- FIG. 8 to 10 are a flowchart (FIG. 8) and an explanatory diagram (FIGS. 9 and 10) showing the operation of the first modification of the tire condition monitoring system shown in FIG.
- FIG. 9 shows the operating conditions of the warning device 40 in FIG. 8
- FIG. 10 shows a specific example of the operation of the warning device 40.
- the warning device 40 operates only at a single warning level and warns the succeeding vehicle 200 (see FIG. 6).
- the present invention is not limited to this, and the warning content of the warning device 40 (for example, the light emission pattern of the warning light or the character content of the warning display) is changed according to the mounting position of the tire 110 in which an abnormality in the tire state quantity has occurred.
- the warning level of the warning device 40 may change stepwise.
- Modification 1 in which the warning level of the warning device 40 changes stepwise will be described with reference to the flowchart of FIG.
- step ST21 the monitoring device 30 acquires the output signal of each tire condition acquisition device 20 (step ST21). This step ST21 is the same as step ST11 of FIG. After step ST21, the process proceeds to step ST22.
- step ST22 the central processing unit 35 of the monitoring device reads the sensor ID registration data 346. After step ST22, the process proceeds to step ST23.
- step ST23 the monitoring device 30 determines whether or not an abnormality has occurred in the tire state quantity. This step ST23 is the same as step ST14 of FIG. If an affirmative determination is made in step ST23, the process proceeds to step ST24, and if a negative determination is made, the process proceeds to step ST27.
- step ST24 the monitoring device 30 determines whether or not an abnormality in the tire state quantity has occurred in the tire 110 at the predetermined mounting position. Specifically, the central processing unit 35 of the monitoring device 30 determines that there is an abnormality in the tire state quantity based on the tire position identification program 345 and the sensor ID registration data 346 read from the storage unit 34 (in step ST23). The mounting position of the tire 110 that has been affirmatively determined) is acquired. The mounting position of the tire 110 can be identified by comparing the unique sensor ID of the tire condition acquisition device 20 attached to the output signal of the tire condition quantity with the registration information of the sensor ID registration data 346.
- the central processing unit 35 executes the tire position identification program 345 to determine whether the mounting position of the tire 110 having an abnormality matches a predetermined mounting position.
- the mounting position serving as the determination criterion is set to the steered wheels. If an affirmative determination is made in step ST24, the process proceeds to step ST25, and if a negative determination is made, the process proceeds to step ST26.
- the monitoring device 30 operates the warning device 40.
- the warning device 40 issues a warning to the following vehicle 200, the driver of the following vehicle 200 is alerted, and a collision accident to the own vehicle 100 by the following vehicle 200 is prevented in advance.
- step ST25 the warning device 40 performs a warning operation indicating a high level warning (warning at the second warning level), and in step ST26, the warning device 40 performs low level warning (at the first warning level). Warning action indicating (warning) is performed.
- the high level warning is a strong warning that alerts the driver of the succeeding vehicle 200 more strongly than the low level warning. Therefore, the warning level is switched according to the mounting position of the tire 110 having an abnormality in the tire state quantity. Thereby, the warning to the following vehicle 200 is performed in steps, and the driver's attention of the following vehicle 200 is effectively alerted.
- the process is terminated, and the process returns to step ST21.
- the stepwise warning described above is realized by the warning device 40 having a stage warning unit (not shown) that issues a warning at a plurality of warning levels.
- a stage warning unit for example, the lamp unit 41 that issues a warning by a lighting operation or a blinking operation of the warning device 40, a configuration in which the area and luminance of the lighting unit increase in a plurality of stages, the shape of the lighting unit, and blinking A configuration in which the speed changes stepwise can be adopted.
- a configuration in which the warning device 40 is a speaker unit that issues a warning by sound output, and the sound content changes stepwise can be adopted.
- the warning device 40 is a display unit that issues a warning by warning display, and the display content changes stepwise.
- the warning device 40 is a communication device 42 of an inter-vehicle communication unit that transmits warning information to the following vehicle 200, and a configuration in which the level of the warning information transmitted to the following vehicle 200 changes stepwise can be adopted.
- the warning device 40 is rear left and right turn signal lamps that issue a warning by a blinking operation, and the blinking speed thereof changes stepwise.
- step ST27 the monitoring device 30 stops the warning device 40. Specifically, the warning device control unit 311 of the monitoring device 30 controls the warning device 40 to prohibit the warning device 40 from warning the following vehicle 200. After this step ST27, the process is terminated, and the process returns to step ST21.
- step ST24 and step ST25 when the mounting position of the abnormal tire 110 is a steered wheel, a warning by a high level warning is given (positive determination in step ST24 and step ST25). Further, when the mounting position of the tire 110 having an abnormality is a wheel other than the steering wheel, a warning by a low level warning is given (determination of step ST24 and step ST26). On the other hand, if no abnormality in the tire state quantity has occurred in any of the tires 110, the warning device 40 is stopped and a warning from the own vehicle 100 to the following vehicle 200 is prohibited (No determination in step ST23). And step ST27).
- the reason why the high level warning is given when the mounting position of the abnormal tire 110 is a steered wheel is as follows. That is, when an abnormality has occurred in the tire 110 of the steered wheel of the host vehicle 100, the steering stability is lowered, and the traveling state of the host vehicle 100 may become unstable. Therefore, it is preferable to alert the driver of the following vehicle 200 strongly by giving a warning to the following vehicle 200 with a high level warning. On the other hand, when an abnormality has occurred in the tires 110 of the wheels other than the steered wheels, it may be possible to continue traveling while maintaining the traveling state of the host vehicle 100. For this reason, it is preferable to refrain from excessive warning to the following vehicle 200 to reduce the driver's uncomfortable feeling and annoyance.
- the host vehicle 100 is a vehicle including driving wheels and driven wheels
- an abnormality has occurred in the tire 110 of the driven wheel, it may be possible to continue traveling while maintaining the traveling state of the host vehicle 100. For this reason, it is preferable to refrain from excessive warning to the following vehicle 200 to reduce the driver's uncomfortable feeling and annoyance.
- the own vehicle 100 is a vehicle having single wheels and multiple wheels (especially a heavy load vehicle)
- a high level is obtained when the mounting position of the tire 110 having an abnormality is a single wheel or an inner wheel of a double wheel.
- a double wheel is a so-called double tire (twin wheel and tire tire arrangement) in which multiple tires are mounted in parallel on one side of a single shaft in order to increase the allowable rear axle load for large trucks, buses, etc.
- double tire twin wheel and tire tire arrangement
- the allowable load of the vehicle increases, and the acceleration force and the deceleration force increase.
- the load on the inner tire increases.
- the warning device 40 is the lamp unit 41, and has a configuration in which the area of the lighting portion is increased stepwise according to the warning level. Then, at the time of a low level warning (step ST26), as shown in FIG. 10A, the warning device 40 performs a warning operation by turning on or blinking only a part of the lighting unit. Thereby, a preliminary warning is given to the following vehicle 200 at an initial stage where the traveling state of the host vehicle 100 is relatively low. On the other hand, at the time of a high level warning, as shown in FIG. 10B, the warning device 40 performs a warning operation by turning on or blinking the entire lighting unit. Thus, a stronger warning is given under a situation where the traveling state of the host vehicle 100 is likely to be unstable, and the driver of the following vehicle 200 is effectively alerted.
- the warning device 40 operates to issue a high level warning or a low level warning.
- the present invention is not limited to this.
- the host vehicle 100 is a vehicle having six or more wheels, and the traveling state of the host vehicle 100 can be maintained even if an abnormality occurs in some of the wheels, the host vehicle Only 100 drivers may be warned and the driver of the following vehicle 200 may not be warned (operation of the warning device 40 is prohibited). Accordingly, it is possible to reduce an uncomfortable feeling and annoyance of the driver of the succeeding vehicle 200 by avoiding an excessive warning to the succeeding vehicle 200.
- FIGS. 11 and 12 are a flowchart (FIG. 11) and an explanatory diagram (FIG. 12) showing the operation of the modified example 2 of the tire condition monitoring system shown in FIG. 1.
- FIG. 12 shows the operating conditions of the warning device 40 in FIG.
- the warning device 40 operates when there is an abnormality in the tire state quantity of any one tire 110 regardless of the presence or absence of the following vehicle 200.
- the present invention is not limited to this, and when the degree of approach P of the succeeding vehicle 200 to the host vehicle 100 is high, it is preferable that a warning is given to the following vehicle 200 even when there is no abnormality in the tire state quantity.
- the warning level by the warning device 40 is switched stepwise in accordance with the relationship between the mounting position of the tire 110 having an abnormality and the degree of approach P of the succeeding vehicle 200.
- steps ST31 and ST32 the monitoring device 30 acquires the output signal of each tire condition acquisition device 20 (step ST31), and acquires the output signal of the following vehicle sensor 310 (step ST32).
- steps ST31 and ST32 are the same as steps ST21 and ST22 of FIG. After these steps ST31 and ST32, the process proceeds to step ST33.
- step ST33 the monitoring device 30 calculates the approaching degree P of the succeeding vehicle 200 with respect to the own vehicle 100. This step ST33 is the same as step ST13 of FIG. After step ST33, the process proceeds to step ST34.
- step ST34 the monitoring device 30 determines whether or not an abnormality has occurred in the tire state quantity. This step ST34 is the same as step ST23 of FIG. If an affirmative determination is made in step ST34, the process proceeds to step ST35, and if a negative determination is made, the process proceeds to step ST38.
- step ST35 the monitoring device 30 determines whether or not an abnormality in the tire state quantity has occurred in the tire 110 at the predetermined mounting position. This step ST35 is the same as step ST24 of FIG. If an affirmative determination is made in step ST35, the process proceeds to step ST36, and if a negative determination is made, the process proceeds to step ST37.
- the monitoring device 30 selects the operation setting of the warning device 40.
- the operation of the warning device 40 is classified into four stages: (a) no warning setting, (b) low level warning setting, (c) medium level warning setting, and (d) high level warning setting.
- the no warning setting is a setting that stops the warning device 40 and prohibits the warning device 40 from warning the following vehicle 200.
- the low level warning setting is a setting in which the warning device 40 performs a mild warning.
- the medium level warning setting is a strong warning that alerts the driver of the following vehicle 200 more strongly than the low level warning.
- the high level warning setting is a strong warning that calls the driver of the succeeding vehicle 200 more strongly than the middle level warning.
- step ST36 (c) medium level warning setting is selected, in step ST37, (b) low level warning setting is selected, and in step ST38, (a) no warning setting is selected. After these steps ST36 to ST38, the process proceeds to step ST39.
- step ST39 the monitoring device 30 determines whether or not the approach degree P is equal to or greater than the threshold value k1. This step ST39 is the same as step ST15 of FIG. If an affirmative determination is made in step ST39, the process proceeds to step ST310, and if a negative determination is made, the process proceeds to step ST311.
- step ST310 the monitoring device 30 increases the operation setting of the warning device 40 by one step. That is, when the operation setting of the warning device 40 selected in steps ST36 to ST38 is (1) no warning setting, it is changed to a low level warning setting, and (2) it is a low level warning setting. Is changed to a medium level warning setting, and (3) if it is a medium level warning setting, it is changed to a high level warning setting. After step ST310, the process proceeds to step ST311.
- step ST311 the monitoring device 30 operates the warning device 40.
- the warning device 40 issues a warning to the following vehicle 200, the driver of the following vehicle 200 is alerted, and a collision accident to the own vehicle 100 by the following vehicle 200 is prevented in advance.
- the monitoring device 30 operates the warning device 40 according to the warning setting set in steps ST36 to ST38 and ST310. Therefore, the warning level by the warning device 40 is switched in a stepwise manner depending on the relationship between the mounting position of the tire 110 having an abnormality and the degree of approach P of the succeeding vehicle 200. Thereby, the warning to the following vehicle 200 is appropriately switched according to the situation.
- step ST35 in FIG. 11 whether or not the mounting position of the tire 110 having an abnormality in the tire state quantity is a steered wheel (step ST35 in FIG. 11) and the degree of approach P of the succeeding vehicle 200 to the host vehicle 100 are high.
- the operation setting of the warning device 40 is selected according to the determination result of whether or not (step ST39). If any of the tires 110 has an abnormality in the tire state quantity, the warning device 40 operates to issue a warning regardless of the mounting position of the ear 110 and the approaching degree P of the following vehicle 200 (FIG. 12 ( a), (b)). Further, if there is no abnormality in the tire condition in any of the tires 110, warning by the warning device 40 is prohibited (FIG.
- step ST34 negative determination in step ST34 and step ST38.
- FIGS. 13 and 14 are a flowchart (FIG. 13) and an explanatory diagram (FIG. 14) showing the operation of the modified example 3 of the tire condition monitoring system shown in FIG. 1.
- FIG. 14 shows the operating conditions of the warning device 40 in FIG.
- the warning level by the warning device 40 is switched in stages based on the mounting position of the tire 110 having an abnormality.
- the present invention is not limited to this, and the warning level of the warning device 40 may be changed stepwise in accordance with the number of tires 110 in which an abnormality has occurred.
- Modification 3 will be described with reference to the flowchart of FIG.
- steps ST41 to ST43 the monitoring device 30 acquires the output signal of each tire condition acquisition device 20 (step ST41), acquires the output signal of the following vehicle sensor 310 (step ST42), The approach degree P of the following vehicle 200 is calculated (step ST43).
- steps ST31 to ST33 are the same as steps ST31 to ST33 in FIG. After these steps ST41 to ST43, the process proceeds to step ST44.
- step ST44 the monitoring device 30 determines whether or not an abnormality has occurred in the tire state quantity. This step ST44 is the same as step ST34 of FIG. If an affirmative determination is made in step ST44, the process proceeds to step ST45, and if a negative determination is made, the process proceeds to step ST48.
- step ST45 the monitoring device 30 determines whether or not the number N of tires 110 having an abnormality in the tire state quantity is equal to or greater than a predetermined threshold k2. As the number N of abnormal tires 110 increases, the traveling state of the vehicle 100 becomes unstable. If an affirmative determination is made in step ST45, the process proceeds to step ST46, and if a negative determination is made, the process proceeds to step ST47.
- steps ST46 to ST48 the monitoring device 30 selects the operation setting of the warning device 40.
- the operation of the warning device 40 is classified into four stages: (a) no warning setting, (b) low level warning setting, (c) medium level warning setting, and (d) high level warning setting.
- Steps ST46 to ST48 are the same as steps ST36 to ST38 in FIG. After these steps ST46 to ST48, the process proceeds to step ST49.
- step ST49 the monitoring device 30 determines whether or not the approach degree P is equal to or greater than the threshold value k1. This step ST49 is the same as step ST39 of FIG. If an affirmative determination is made in step ST49, the process proceeds to step ST410, and if a negative determination is made, the process proceeds to step ST411.
- step ST410 the monitoring device 30 increases the operation setting of the warning device 40 by one level. This step ST410 is the same as step ST310 in FIG. After step ST410, the process proceeds to step ST411.
- step ST411 the monitoring device 30 operates the warning device 40.
- the warning device 40 issues a warning to the following vehicle 200, the driver of the following vehicle 200 is alerted, and a collision accident to the own vehicle 100 by the following vehicle 200 is prevented in advance.
- the monitoring device 30 operates the warning device 40 according to the warning setting set in steps ST46 to ST48 and ST410. Therefore, the warning level by the warning device 40 is switched in a stepwise manner based on the relationship between the number N of tires 110 having an abnormality and the degree of approach P of the following vehicle 200. Thereby, the warning to the following vehicle 200 is appropriately switched according to the situation.
- step ST45 in FIG. 13 whether or not the number N of tires 110 having an abnormality in the tire state quantity is plural (k2 ⁇ N) (step ST45 in FIG. 13) and the approach of the succeeding vehicle 200 to the host vehicle 100.
- the operation setting of the warning device 40 is selected according to the determination result of whether or not the degree P is high (step ST49).
- the warning device 40 operates to issue a warning regardless of the degree of approach P of the succeeding vehicle 200 (FIG. 14A). ), (B)).
- warning by the warning device 40 is prohibited (FIG.
- step ST44 negative determination in step ST44 and step ST48. Further, when the degree of approach P of the following vehicle 200 with respect to the host vehicle 100 is high, a warning is given to the following vehicle 200 even when there is no abnormality in the tire state quantity (FIG. 14B: step ST44). Negative determination, positive determination of step ST48 and step ST49).
- the tire condition monitoring system 10 includes a plurality of tire condition acquisition devices 20 that are installed in a plurality of tires 110 of the host vehicle 100 and acquire tire condition quantities, and a plurality of tire condition acquisition apparatuses 20.
- a monitoring device 30 that receives each output signal and performs a predetermined process, and a warning device 40 that issues a warning toward the following vehicle 200 are provided (see FIG. 1). Further, the monitoring device 30 operates the warning device 40 when there is a predetermined abnormality in the tire state quantity (see FIG. 5).
- the monitoring device 30 operates the warning device 40 to give a warning toward the following vehicle 200 (see FIG. 5).
- a warning is appropriately given to the following vehicle 200, and the collision of the following vehicle 200 to the own vehicle 100 is prevented.
- the monitoring device 30 changes the warning content of the warning device 40 according to the mounting position of the tire 110 in which an abnormality has occurred (see FIG. 8).
- the content of the warning from the own vehicle 100 to the succeeding vehicle 200 changes according to the mounting position of the tire 110 having an abnormality.
- the monitoring device 30 uses the warning device 40 at the first warning level when there is an abnormality in the tire condition quantity of the tire 110 attached to a wheel other than the steering wheel of the host vehicle 100.
- the warning device 40 is operated at the second warning level having a higher warning level than the first warning level. (See FIG. 8).
- a warning is given to the succeeding vehicle 200 at a higher warning level than when there is an abnormality in the tire 110 of the other wheels.
- the monitoring device 30 operates the warning device 40 at the first warning level when there is an abnormality in the tire condition amount of the tire 110 attached to the driven wheel of the host vehicle 100.
- the warning device 40 is operated at the second warning level having a higher warning level than the first warning level (FIG. 8).
- a warning is given to the succeeding vehicle 200 at a higher warning level than when the driven wheel tire 110 is abnormal.
- the monitoring device 30 is a warning device at the first warning level when there is an abnormality in the tire condition quantity of the tire 110 attached to one of the wheels of the host vehicle 100.
- the warning device 40 is operated at the second warning level having a higher warning level than the first warning level. (See FIG. 8).
- a warning is given to the succeeding vehicle 200 at a higher warning level than when there is an abnormality in the double-wheel tire 110.
- the monitoring device 30 uses the warning device 40 at the first warning level when there is an abnormality in the tire condition quantity of the tire 110 mounted on the outer wheels of the compound vehicle 100.
- a warning device with a second warning level having a higher warning level than the first warning level 40 is operated (see FIG. 8).
- a warning is given to the succeeding vehicle 200 at a higher warning level than when the tire 110 on the outer wheel of the double wheel is abnormal.
- the monitoring device 30 changes the warning content of the warning device 40 according to the number N of tires 110 in which an abnormality has occurred (see FIG. 13).
- the content of the warning from the own vehicle 100 to the succeeding vehicle 200 changes according to the number N of tires 110 having an abnormality.
- the monitoring device 30 operates the warning device 40 at the first warning level when there is an abnormality in the tire condition quantity of one tire 110, and the tire conditions of the plurality of tires 110 are detected.
- the warning device 40 is operated at the second warning level having a higher warning level than the first warning level (see FIG. 13).
- the warning level from the own vehicle 100 to the following vehicle 200 changes stepwise in accordance with the number N of tires 110 having an abnormality.
- the tire condition monitoring system 10 includes a subsequent vehicle sensor 310 that acquires information necessary for calculating the approach degree P of the subsequent vehicle 200 to the own vehicle 100 (see FIGS. 1 and 3).
- the monitoring device 30 also has a warning level having a higher warning level than the warning level when the approaching degree P of the succeeding vehicle 200 is less than the threshold when the approaching degree P of the following vehicle 200 is equal to or greater than a predetermined threshold. Then, the warning device 40 is operated (see FIGS. 11 and 13). In such a configuration, the warning level from the own vehicle 100 to the following vehicle 200 changes stepwise in accordance with the approach degree P of the following vehicle 200 with respect to the own vehicle 100. Thereby, there exists an advantage by which the warning to the following vehicle 200 is performed appropriately.
- the monitoring device 30 prohibits warning by the warning device 40 when there is no abnormality in the tire condition amount (see FIG. 5). In such a configuration, since the occurrence of warnings from the own vehicle 100 to the following vehicle 200 is suppressed, there is an advantage that the driver's uncomfortable feeling and troublesomeness of the following vehicle 200 can be reduced.
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Abstract
Description
図1は、この発明の実施の形態にかかるタイヤ状態監視システムを示す構成図である。同図は、タイヤ状態監視システム10を搭載した自車100の構成を模式的に示している。図2は、図1に記載したタイヤ状態監視システムのタイヤ状態取得装置を示すブロック図である。図3は、図1に記載したタイヤ状態監視システムの監視装置および警告装置を示すブロック図である。図4は、図3に記載した監視装置の記憶部を示すブロック図である。同図は、記憶部34に格納された各種のプログラムおよびデータの一部を示している。
タイヤ状態監視システム10の稼働時には、以下のように、各車輪のタイヤ110のタイヤ状態量が監視されて、自車100のドライバーへの報知あるいは警告が行われる。
上記のように、自車100のいずれかのタイヤ110に異常が発生している場合には、自車100の走行状態が不安定となり、例えば、走行速度の低下や蛇行運転が生じる可能性がある。この場合には、自車100から後続車200に向けて警告を発して、後続車200のドライバーの注意を喚起することが好ましい。これにより、自車100との車間距離を十分に確保する等の適切な対応を後続車200に促して、後続車200による自車100への衝突事故を未然に防止できる。このような警告は、例えば、自車と後続車との車間距離が狭い場合や後続車が自車に急接近している場合などに、特に有益である。
図8~図10は、図1に記載したタイヤ状態監視システムの変形例1の作用を示すフローチャート(図8)および説明図(図9および図10)である。これらの図において、図9は、図8における警告装置40の動作条件を示し、図10は、警告装置40の動作の具体例を示している。
図11および図12は、図1に記載したタイヤ状態監視システムの変形例2の作用を示すフローチャート(図11)および説明図(図12)である。これらの図において、図12は、図11における警告装置40の動作条件を示している。
図13および図14は、図1に記載したタイヤ状態監視システムの変形例3の作用を示すフローチャート(図13)および説明図(図14)である。これらの図において、図14は、図13における警告装置40の動作条件を示している。
以上説明したように、このタイヤ状態監視システム10は、自車100の複数のタイヤ110にそれぞれ設置されてタイヤ状態量を取得する複数のタイヤ状態取得装置20と、複数のタイヤ状態取得装置20の出力信号をそれぞれ受信して所定の処理を行う監視装置30と、後続車200に向けて警告を発する警告装置40とを備える(図1参照)。また、監視装置30は、タイヤ状態量に所定の異常があるときに、警告装置40を動作させる(図5参照)。
Claims (10)
- 自車の複数のタイヤにそれぞれ設置されてタイヤ状態量を取得する複数のタイヤ状態取得装置と、前記複数のタイヤ状態取得装置の出力信号をそれぞれ受信して所定の処理を行う監視装置と、後続車に向けて警告を発する警告装置とを備え、且つ、
前記監視装置は、前記タイヤ状態量に所定の異常があるときに、前記警告装置を動作させることを特徴とするタイヤ状態監視システム。 - 前記監視装置は、前記異常が発生した前記タイヤの装着位置に応じて、前記警告装置の警告の内容を変化させる請求項1に記載のタイヤ状態監視システム。
- 前記監視装置は、
前記自車の操舵輪以外の車輪に装着された前記タイヤの前記タイヤ状態量に前記異常があるときに、第一の警告レベルで前記警告装置を動作させ、
前記自車の操舵輪に装着された前記タイヤの前記タイヤ状態量に前記異常があるときに、前記第一の警告レベルよりも高い警告度をもつ第二の警告レベルで前記警告装置を動作させる請求項1または2に記載のタイヤ状態監視システム。 - 前記監視装置は、
前記自車の従動輪に装着された前記タイヤの前記タイヤ状態量に前記異常があるときに、第一の警告レベルで前記警告装置を動作させ、
前記自車の駆動輪に装着された前記タイヤの前記タイヤ状態量に前記異常があるときに、前記第一の警告レベルよりも高い警告度をもつ第二の警告レベルで前記警告装置を動作させる請求項1~3のいずれか一つに記載のタイヤ状態監視システム。 - 前記監視装置は、
前記自車の複輪の1つの車輪に装着された前記タイヤの前記タイヤ状態量に前記異常があるときに、第一の警告レベルで前記警告装置を動作させ、
前記自車の単輪に装着された前記タイヤの前記タイヤ状態量に前記異常があるときに、前記第一の警告レベルよりも高い警告度をもつ第二の警告レベルで前記警告装置を動作させる請求項1~4のいずれか一つに記載のタイヤ状態監視システム。 - 前記監視装置は、
前記自車の複輪の外側車輪に装着された前記タイヤの前記タイヤ状態量に前記異常があるときに、第一の警告レベルで前記警告装置を動作させ、
前記自車の複輪の内側車輪に装着された前記タイヤの前記タイヤ状態量に前記異常があるときに、前記第一の警告レベルよりも高い警告度をもつ第二の警告レベルで前記警告装置を動作させる請求項1~5のいずれか一つに記載のタイヤ状態監視システム。 - 前記監視装置は、前記異常が発生した前記タイヤの個数に応じて、前記警告装置の警告の内容を変化させる請求項1~6のいずれか一つに記載のタイヤ状態監視システム。
- 前記監視装置は、
1つの前記タイヤの前記タイヤ状態量に前記異常があるときに、第一の警告レベルで前記警告装置を動作させ、
複数の前記タイヤの前記タイヤ状態量に前記異常があるときに、前記第一の警告レベルよりも高い警告度をもつ第二の警告レベルで前記警告装置を動作させる請求項1~7のいずれか一つに記載のタイヤ状態監視システム。 - 前記自車に対する後続車の接近度の算出に必要な情報を取得する後続車センサを備え、且つ、
前記監視装置は、
前記後続車の接近度が所定の閾値以上であるときに、前記後続車の接近度が前記閾値未満であるときの警告レベルよりも高い警告度をもつ警告レベルで前記警告装置を動作させる請求項1~8のいずれか一つに記載のタイヤ状態監視システム。 - 前記監視装置は、前記タイヤ状態量に前記異常が無いときに、前記警告装置による前記警告を禁止する請求項1~9のいずれか一つに記載のタイヤ状態監視システム。
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