WO2004013596A1 - タイヤの歪み状態検出方法、歪み状態検出装置及びそのタイヤ - Google Patents
タイヤの歪み状態検出方法、歪み状態検出装置及びそのタイヤ Download PDFInfo
- Publication number
- WO2004013596A1 WO2004013596A1 PCT/JP2003/009169 JP0309169W WO2004013596A1 WO 2004013596 A1 WO2004013596 A1 WO 2004013596A1 JP 0309169 W JP0309169 W JP 0309169W WO 2004013596 A1 WO2004013596 A1 WO 2004013596A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tire
- conductor
- electromagnetic wave
- conductor pieces
- pieces
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/06—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
- B60C23/064—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 comprising tyre mounted deformation sensors, e.g. to determine road contact area
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
-
- 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
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
- B60C13/001—Decorating, marking or the like
-
- 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
- B60C23/06—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
-
- 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
- B60C23/068—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 chassis to tyre distance
-
- 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]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/10—Mounting of suspension elements
- B60G2204/11—Mounting of sensors thereon
- B60G2204/113—Tyre related sensors
-
- 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
- B60T2240/00—Monitoring, detecting wheel/tire behaviour; counteracting thereof
- B60T2240/04—Tire deformation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
Definitions
- the present invention relates to a tire distortion state detection method and a tire distortion state detection device for detecting a distortion state of a tire during traveling of a vehicle, and a tire thereof.
- the brakes are applied when the frictional force between the road surface and the tires decreases, such as when the road surface is wet during rainy weather.
- the vehicle slipped in unexpected directions, causing the vehicle to move in an unexpected direction, causing an accident.
- ABS anti-lock brake systems
- traction 'control' systems traction 'control' systems
- YAW sensor a stability control system with a YAW sensor
- ABS is a system that detects the rotation state of each tire, and controls the braking force based on the detection result so as to prevent the tire from entering the tuck state.
- the rotation state of the tire it is possible to detect the state of rotation of each tire, air pressure, distortion, and the like, and use the detection result for control.
- the tire pressure is estimated using a so-called “indirect type” tire pressure detection method that estimates the tire pressure by inputting data from an ABS speed sensor. Is also known.
- Examples of the method of detecting the tire pressure used in this device include: (a) a method of obtaining a change (radius) in a rolling radius of a tire due to a decrease in air pressure from a rotational angular velocity of a wheel; and (b) inputting an FFT ( Fast Fourier Transform)
- FFT Fast Fourier Transform
- a magnetic bar code in which the polarities of the adjacent portions are mutually changed is provided so as to form a row in the circumferential direction of the sidewall portion of the tire, and the bar code is fixed by a sensor fixed to a chassis or a wheel shaft. Read.
- the rotational speed of the tire can be detected, and by providing two or more rows of magnetic barcodes in the radial direction of the tire, the phase difference between the detection results of the magnetic barcodes of the inner and outer wheels can be used. Force and deformation can be calculated.
- the second conventional example it was improved that it was difficult to form magnetic bands at a narrow interval in the first conventional example, and the second conventional example was adjacently arranged in the circumferential direction of the sidewall portion of the tire.
- a tire is disclosed in which the resolution of a magnetic bar code in which the polarities of parts are changed mutually is enhanced.
- the heat generated in the tires while the vehicle is running may gradually weaken the magnetization of the magnetic band, and as the running time increases, the detection by the sensor may become more difficult.
- an object of the present invention is to provide a method for detecting a strain state of a tire, a strain state detecting device, and a tire that can be used for a control system such as a stabilization control system while reducing the occurrence of deterioration. That is. Disclosure of the invention
- the present invention provides a method in which a plurality of conductor pieces embedded in a tire in a row at predetermined intervals in the circumferential direction of the tire are embedded in two or more different layers.
- a tire, and a monitor having a scanner unit provided in a tire house of the vehicle the method comprising: detecting a distortion state of a rotating tire; A pulse electromagnetic wave is radiated toward the surface of the conductor piece along the row of the body pieces, and the pulse electromagnetic wave reflected by the conductor piece of each layer and a member other than the conductor is reflected by the scanner unit.
- the process of measuring the time from when the pulsed electromagnetic wave is radiated to when the reflected pulsed electromagnetic wave is received is repeated, and the tire is distorted.
- the measured time is stored as a reference value when the tire is not being operated, and the measured time is compared with the stored reference value to detect the tire distortion state. Suggest a method.
- the pulse electromagnetic wave radiated from the scanner unit is reflected by the conductor piece or another member having electromagnetic wave reflectivity, and the reflected pulse electromagnetic wave is received by the scanner unit.
- the time required for radiating the pulsed electromagnetic wave from the scanner unit and receiving the reflected wave depends on the distance between the reflector that reflects the pulsed electromagnetic wave and the scanner unit. Change. Further, when the strain state of the tire changes, the value of the difference between the reciprocating times corresponding to the conductor pieces embedded in each of the different layers also changes.
- the conductor piece is displaced in accordance with the strain of the tire, and the pulse electromagnetic wave radiated from the scanner unit is scanned by a member other than the conductor piece by the scanner. Reflected toward the unit. Therefore, the distortion state of the tire can be detected based on the value of the round trip time or the difference between the round trip times of the different layers.
- the monitor device may be configured such that: the distance between the conductor pieces or the conductor pieces adjacent to each other in a circumferential direction of the tire or the circumferential direction of the tire.
- One or more pulsed electromagnetic waves are radiated during the smaller distance or length of the conductor pieces, and all the conductor pieces are radiated.
- a method for detecting a strain state of a tire for measuring the time between the adjacent conductor pieces is
- the smaller distance or length of the distance between the conductor pieces or the conductor pieces adjacent in the circumferential direction of the tire or the length of the conductor pieces in the circumferential direction of the tire is preferred. Since one or more pulsed electromagnetic waves are radiated during the measurement, the time is measured, so that a resolution equal to or greater than the number of conductor pieces arranged in a row in the circumferential direction of the tire can be obtained, and high precision can be obtained. At the same time.
- the present invention also provides the tire distortion state detection method described above, wherein the monitoring device proposes a tire distortion state detection method that radiates the pulsed electromagnetic wave using a frequency of 1 GHz or more.
- the frequency of the pulse wave in the frequency of more than 1 GH Z since the frequency of the pulse wave in the frequency of more than 1 GH Z, it is possible to reduce the influence of reflection by Totsuyo metal in the tire having a greater gap than the wavelength of the frequency .
- the present invention also provides a tire distortion state detecting device for detecting a tire distortion state during running of a vehicle, wherein the plurality of conductive layers embedded in the tire are arranged in rows at predetermined intervals in a circumferential direction of the tire.
- a tire embedded in two or more layers having different body pieces, and a moeta device including a scanner unit provided in a tire house of the vehicle, wherein the monitor device includes a conductor piece of each layer from the scanner unit. Means for radiating a pulsed electromagnetic wave toward one surface of the conductor piece along the rows of the conductor piece; and a means provided in the scanner unit for reflecting by the conductor piece of each layer and members other than the conductor piece.
- Means for receiving the pulsed electromagnetic wave Means for measuring the time from when the pulsed electromagnetic wave is radiated to when the reflected pulsed electromagnetic wave is received, and Means for alternately and repeatedly performing the radiation of the reflected pulsed electromagnetic wave, and means for storing a time measured when the tire is not distorted as a reference value; and
- a tire distortion state detecting device comprising means for detecting the tire distortion state by comparing the reference value with the stored reference value.
- the pulsed electromagnetic wave radiated from the scanner unit is reflected by the conductor piece or another member having electromagnetic wave reflection, and the reflected pulsed electromagnetic wave is received by the scanner unit.
- the scanner The time until the pulse electromagnetic wave is radiated from the scanner unit and the reflected wave is received by the scanner unit, that is, the round-trip time of the pulse electromagnetic wave, is determined by the reflector reflecting the pulse electromagnetic wave and the scanner unit. Varies according to the distance between
- the value of the difference between the round trip times corresponding to the conductor pieces embedded in each of the different layers also changes.
- the conductor piece is displaced in accordance with the strain of the tire, and the pulse electromagnetic wave radiated from the scanner unit is transmitted to the scanner unit by a member other than the conductor piece. Reflected toward.
- the monitoring device repeatedly measures the reciprocating time of the pulsed electromagnetic wave, and stores the time measured when no distortion occurs in the tire as a reference value. Further, the monitoring device compares the time measured during the traveling of the vehicle with the stored reference value to detect a distortion state of the tire. Therefore, the distortion state of the tire can be detected based on the value of the round trip time or the difference between the round trip times of the different layers.
- the present invention also provides the tire distortion state detecting device, wherein the surface of the conductor piece is substantially parallel to the surface of the tire tread so that a distortion state of the tread of the tire can be mainly detected. As such, each conductor piece was embedded in the tire.
- the present invention provides the tire distortion state detecting device, wherein the surface of the conductor piece is substantially parallel to the surface of the sidewall of the tire so that the distortion state of the sidewall of the tire can be mainly detected.
- Each conductor piece was buried in the tire so as to be in a proper state.
- the frequency of the pulsed electromagnetic wave is reduced.
- the frequency was set to 1 GHz or higher.
- the present invention provides the tire distortion state detecting device, wherein the measurement time changes with a constant cycle when the tire is rotating at a constant rotation speed without distortion.
- the present invention also provides the tire distortion state detection device, wherein the conductor piece in the first conductor row provided on the outermost side with respect to the rotation axis of the tire is provided at an end of the tire in the circumferential direction of the tire.
- the conductor pieces in the second conductor row provided one inward of the first conductor row have different end portions in the circumferential direction of the tire of the conductor pieces overlapping by a predetermined length. According to this effort, when the strain of the tire becomes larger than a predetermined amount, the conductor piece of the first conductor row and the conductor piece of the second conductor row are arranged. There is no overlap with the conductor pieces, and a gap is created between them. When this gap occurs, the reciprocating time of the pulse electromagnetic wave greatly changes, so that it is possible to detect that the strain state of the tire has become larger than the predetermined amount.
- the present invention provides a tire used in the tire distortion state detecting device, comprising a plurality of conductor pieces embedded in the tire in a row at predetermined intervals in a circumferential direction of the tire.
- a tire in which the rows are embedded in two or more different layers so that there are parts where the planes do not overlap each other.
- the present invention also proposes a tire according to the above tire, wherein each conductor piece is embedded in the tire such that the surface of the conductor piece is substantially parallel to the surface of the tire tread. .
- the present invention provides the tire according to the above tire, wherein each conductor piece is embedded in the tire such that a surface of the conductor piece is substantially parallel to a surface of a sidewall of the tire. suggest.
- the conductor pieces are arranged at equal intervals in a circumferential direction of the tire.
- a tire is proposed in which the length of the conductor piece in the circumferential direction of the tire and the length of the gap between adjacent conductor pieces are set to be equal.
- the present invention is directed to the above-described tire, in the circumferential direction of the tire of the conductor piece in the first conductor row provided at the outermost side with respect to the rotation axis of the tire.
- the end of the conductor piece in the second conductor row provided one inside the first conductor row in the circumferential direction of the tire is overlapped by a predetermined length with respect to the end of the first conductor row.
- a tire in which each conductor piece is arranged is proposed.
- the present invention proposes the above-mentioned tire, wherein the conductor pieces are arranged at equal intervals in the same layer.
- the present invention also provides the tire according to the above tire, wherein the conductor pieces of each layer are arranged such that the conductor pieces provided in two different layers are alternately positioned in a circumferential direction of the tire. Suggest.
- the present invention proposes a tire as described above, wherein the conductor pieces of the respective layers are arranged so that a part of the conductor pieces overlap in the circumferential direction of the tire.
- the present invention proposes the tire in the above tire, wherein the conductor pieces of the respective layers are arranged so as to be shifted in the width direction of the tire.
- FIG. 1 is a schematic view showing a state in which a tire distortion state detecting device according to a first embodiment of the present invention is mounted on a vehicle.
- FIG. 2 is a top view of the tire according to the first embodiment of the present invention.
- FIG. 3 is a cutaway view showing the state of embedding the metal foil in the tire according to the first embodiment of the present invention.
- FIG. 4 is a view for explaining an overlapping state of metal foils of different layers according to the first embodiment of the present invention.
- FIG. 5 is a configuration diagram showing a specific example of an electric circuit of the monitor device according to the first embodiment of the present invention.
- FIG. 6 is a diagram illustrating a method for detecting a tire distortion state according to the first embodiment of the present invention.
- FIG. 7 is a diagram for explaining a method of detecting a tire distortion state in the first embodiment of the present invention.
- FIG. 8 is a timing chart illustrating a method for detecting a tire distortion state in the first embodiment of the present invention.
- FIG. 9 is a timing chart for explaining a method of detecting a tire distortion state in the first embodiment of the present invention.
- FIG. 10 is a timing chart illustrating a method for detecting a tire distortion state in the first embodiment of the present invention.
- FIG. 11 is a diagram for explaining a method for detecting a tire distortion state in the first embodiment of the present invention.
- FIG. 12 is a timing chart for explaining a method for detecting a tire distortion state in the first embodiment of the present invention.
- FIG. 13 is a diagram illustrating an example of use of the tire distortion state detecting device according to the first embodiment of the present invention.
- FIG. 14 is a schematic view showing a state in which the tire distortion state detecting device according to the second embodiment of the present invention is mounted on a vehicle.
- FIG. 15 is a cutaway view showing the state of embedding metal foil in a tire according to the third embodiment of the present invention.
- FIG. 16 is a top view illustrating the state of embedding metal foil in a tire according to the third embodiment of the present invention.
- FIG. 1 is a schematic diagram showing a state in which a tire distortion state detecting device according to a first embodiment of the present invention is mounted on a vehicle.
- 101 and 102 are metal foils (conductor pieces)
- 200 is a monitoring device
- 300 is a tire
- 400 is a tire house.
- the metal foils 101 and 102 are made of a metal having a property of reflecting electromagnetic waves, such as a rectangular aluminum foil having a predetermined width and length.
- the plurality of metal foils 101 have a force S, the surfaces of which are substantially parallel to the surface of the cap tread 301, and the long sides of the metal foils 101 are centered on the rotation axis of the tire 300.
- the tires 300 are arranged in a layer in the circumferential direction around the rotation axis of the tire 300 and at equal intervals in the layer between the cap tread 301 and the undertread 302 so as to match the circumferential direction. Further, the distance between adjacent metal foils 101 (the length L12 of the gap) is set equal to the length L11 of the metal foil 101.
- a plurality of metal foils 102 are arranged so that their surfaces are substantially parallel to the surface of the cap tread 301 and the long sides of the metal foils 102 are aligned in the circumferential direction around the rotation axis of the tire 300.
- the tires 300 are arranged between the carcass 304 and the belt 303B at equal intervals L22 in rows in the circumferential direction around the rotation axis of the tire 300.
- the length L21 of the long side of the metal foil 102 is such that both ends in the length direction of the metal foil 102 overlap the ends of the different metal foils 101 by the length L3. Is set to.
- the metal foils 101 and 102 are arranged such that the center in the width direction of the conductor row including the plurality of metal foils 101 and the center in the width direction of the conductor row including the plurality of metal foils 102 substantially overlap. I have.
- the monitoring device 200 is provided in the tire housing 400 of the vehicle so as to correspond to the top of the tire 300.
- the tire distortion state detecting device according to the present embodiment includes a tire 300 in which the metal foils 101 and 102 are embedded and a monitoring device 200.
- the monitor device 200 includes a radiation unit 210, a reception unit 220, a control unit 230, a calculation unit 240, and a distortion detection unit 250.
- the radiation unit 210 includes an antenna 211 for radiating an electromagnetic wave of a predetermined frequency in the 2.45 GHz band and an oscillating unit 212. Based on an instruction from the control unit 230, the radiation unit 210 And radiates the electromagnetic waves in a pulse form.
- the oscillating unit 212 includes an oscillating circuit 213 and a power amplifying circuit 214.
- the oscillation circuit 213 is configured using a known PLL circuit or the like, and outputs a carrier having a frequency of 2.45 GHz based on an instruction from the control unit 230.
- the power amplification circuit 214 amplifies the carrier output from the oscillation circuit 131 and supplies the pulse to the antenna 211. As a result, a 2.45 GHz pulsed electromagnetic wave is radiated from the antenna 211.
- the high-frequency power output from the power amplification circuit 214 is, as shown in FIG. 1, a pulsed electromagnetic wave radiated from the antenna 211 for radiating electromagnetic waves in the monitor device 200, which is reflected by the metal foils 101 and 102. Is set to a value such that it can be received by the antenna 221 described later.
- the receiving unit 220 is for receiving electromagnetic waves having a frequency in the 2.45 GHz band. It is composed of an antenna 221 and a detection unit 222.Based on an instruction from the control unit 230, the high-frequency energy of the electromagnetic wave of a predetermined width including 2.45 GHz received by the antenna 221 is converted into a DC voltage. Converted and output as detection voltage Vout.
- the detection unit 222 includes a tuning circuit 223 and a detection circuit 224.
- the tuning circuit 223 tunes to an electromagnetic wave in the frequency band of ⁇ centered at 2.45 GHz, converts the high-frequency energy into electric energy, and outputs the same.
- the detection circuit 224 converts the electric energy output from the tuning circuit 223 into a DC voltage and outputs it as a detection voltage Vout.
- the control unit 230 performs an initial setting process when receiving an initial setting instruction from a higher-level device (not shown), and performs a distortion detecting process when receiving a distortion detection instruction from the higher-level device.
- the initial setting process is performed when the tire 300 is rotating in a state where the vehicle is running and there is no distortion.
- the control unit 230 notifies the distortion detecting unit 250 that the process is the initial setting process, and then drives the oscillating unit 212 to emit pulsed electromagnetic waves having a pulse width of time 11 at predetermined time intervals.
- the radiation timing of the pulsed electromagnetic wave is notified to the arithmetic unit 250.
- the radiation interval of the pulsed electromagnetic wave is preferably set so that a reflected wave can be obtained at least once for each of the metal foils 101 and 102. By narrowing the radiation interval of the pulsed electromagnetic wave, the detection of the distortion state is improved. Needless to say, it can be performed with high accuracy.
- the calculation unit 240 is configured to detect when the detection voltage Vout exceeds a predetermined threshold value after receiving the notification of the radiation timing, that is, when the pulse electromagnetic wave reflected by the metal foils 101 and 102 is received. Measure the time T until and output this value to the distortion detector 250.
- the distortion detecting unit 250 sequentially stores the measurement time output from the calculating unit 240 over time, and based on the stored value, at the end of the initial setting process, the metal foil 101
- the round trip time T 1 when the pulse electromagnetic wave is reflected and the round trip time T 2 when the pulse electromagnetic wave is reflected by the metal foil 102 are stored, and the average value Tavg of the measurement time T within the initial setting processing time is stored.
- the distortion detection unit 250 outputs the values of the round trip times T 1 and T 2 and the average value Tavg to the host device.
- the above initial setting process is performed at a plurality of traveling speeds when there is a possibility that the initial setting process may be changed depending on the traveling speed of the vehicle, that is, the rotation speed of the tire 300, and the value of the round trip time T1, T2 at each traveling speed and the average value It is preferable to find Tavg.
- the control unit 230 notifies the distortion detection unit 250 of the distortion detection process, and then drives the oscillation unit 212 to radiate a pulse electromagnetic wave having a pulse width of time 1 and Then, the radiation timing of the pulse electromagnetic wave is notified to the arithmetic unit 250.
- the calculation unit 240 performs the processing from when the notification of the radiation timing is received to when the detection voltage Vout exceeds a predetermined threshold value, that is, when the pulse electromagnetic waves reflected by the metal foils 101 and 102 are received.
- the time T is measured, and this value is output to the distortion detection unit 250.
- the value and the measurement time T are sequentially output to the host device over time.
- the timing of outputting the value of the difference Tdif and the measurement time T to the host device is not limited to every measurement, and may be output at a predetermined time interval. This is preferably set as appropriate according to the diameter of the tire 300, the lengths L11 and L21 of the metal foils 101 and 102 and the intervals L12 and L22, the processing speed of the arithmetic unit 240, or the requirements of the host device. .
- the pulse electromagnetic wave P 1 radiated from the monitor device 200 is reflected by the metal foil 101 or 102 and reflected as a reflected wave P2.
- the signal is received by the monitor device 200.
- the round trip time T of the pulsed electromagnetic wave measured by the monitor device 200 repeats a change between the time T1 and the time T2 as shown in FIG.
- the metal foil 101 since the length L 11 and the interval L 12 extends, the shown Suyo the first 0 Figure, between T L2B when the time measured time T 1 is maintained T L1B and the measurement time T2 is maintained, distortion It is larger than the time T L1 and the time T L2 when no occurrence occurs. Furthermore, when the force in the forward and rearward directions from the top of the tire 300 increases, the portion where the metal foil 101 and the metal foil 102 overlap in the circumferential direction of the tire (the overlapping portion of the above-described length L3) disappears.
- a gap 103 having a length L4 is generated between the metal foil 101 and the metal foil 102.
- the pulsed electromagnetic wave P1 radiated from the monitor device 200 enters the gap 103, the pulsed electromagnetic wave is reflected by the electromagnetic wave reflector, for example, the rim 305, which is located further on the rotation axis side of the tire than the metal foil 102, and the reflected wave P 2 is received by the module 200.
- the round-trip time T of the pulsed electromagnetic wave at this time is a time T3 longer than the round-trip time T2 when reflected by the metal foil 102, as shown in FIG.
- the tire distortion state detecting device described above can be used, for example, in a stability control device 500 as shown in FIG.
- the conventional general stability control device performs stability control by taking in the detection results output from the sensors 510 and 520 that detect the rotation speed of the tire 300 mounted on the vehicle.
- the control with higher accuracy can be achieved. Will be able to do so.
- the instruction to the control unit 230 of the monitor 200 is Output from the controller 500.
- two monitor devices 200A and 200B are provided before and after the upper portion of the tire house 400.
- the radiation and reception of the electromagnetic wave by each of the monitoring devices 200A and 200B may be performed in a time sharing manner.
- the monitor device 200 may be provided at three or more locations of the tire house 400 so that distortion at three locations of the tire 300 can be detected.
- an apparatus including a tire 300A instead of the tire 300 in the first embodiment was configured.
- the difference between the first embodiment and the third embodiment is only the tire 300A.
- the conductor row including the plurality of metal foils 101 and the conductor row including the plurality of metal foils 102 are shifted in the width direction of the tire 300 and in the opposite direction.
- the widths of the metal foil 101 and the metal foil 102 are set in the same manner as in the first embodiment, and only the width L5 of the portion where the metal foil 101 and the metal foil 102 overlap is set smaller than that in the first embodiment.
- the above embodiment is a specific example of the present invention, and the present invention is not limited to the above embodiment.
- the same effect can be obtained even when the device configuration uses a tire in which the metal foils 101 and 102 are provided in the sidewall portions of the tire.
- the frequency of the pulsed electromagnetic wave is set to 2.45 GHz, but is not limited to this. If the frequency is 1 GHz or more as described above, the reinforcing metal in the tire is used. Thus, the influence of the reflection or interruption of the electromagnetic wave due to the tire can be extremely reduced, and the distortion state of the tire can be detected with high accuracy. Further, it is preferable that the frequency of the pulsed electromagnetic wave is appropriately set at the time of design in consideration of the influence of the reinforcing metal and the like.
- the above-described embodiment may be used as a sensor of a device for actively controlling a trunk control device or a stabilizer in a suspension ⁇ or a suspension. Industrial applicability.
- the present invention it is possible to reduce the time and effort required for tire manufacturing as compared with the conventional example, and to use the present invention in a control system such as a stabilization control system. Deterioration and rupture of the sensor unit due to heat can be reduced, and a tire distortion state can be detected with high accuracy.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tires In General (AREA)
- Measuring Fluid Pressure (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03741492A EP1526367A4 (en) | 2002-08-02 | 2003-07-18 | METHOD FOR DETECTING THE CONDITION OF CHARGE OF A TIRE, DEVICE FOR DETECTING THE CONDITION OF CHARGE AND TIRE |
US10/505,215 US7302836B2 (en) | 2002-08-02 | 2003-07-18 | Method for detecting strain state of tire, device for detecting strain state, and the tire |
US11/871,066 US20080029192A1 (en) | 2002-08-02 | 2007-10-11 | Tire distortion detecting method, distortion detector, and tire thereof |
US11/940,180 US20080079593A1 (en) | 2002-08-02 | 2007-11-14 | Tire distortion detecting method, distortion detector, and tire thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-226050 | 2002-08-02 | ||
JP2002226050A JP4231254B2 (ja) | 2002-08-02 | 2002-08-02 | タイヤの歪み状態検出方法、歪み状態検出装置及びそのタイヤ |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/871,066 Division US20080029192A1 (en) | 2002-08-02 | 2007-10-11 | Tire distortion detecting method, distortion detector, and tire thereof |
US11/940,180 Continuation US20080079593A1 (en) | 2002-08-02 | 2007-11-14 | Tire distortion detecting method, distortion detector, and tire thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004013596A1 true WO2004013596A1 (ja) | 2004-02-12 |
Family
ID=31492177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/009169 WO2004013596A1 (ja) | 2002-08-02 | 2003-07-18 | タイヤの歪み状態検出方法、歪み状態検出装置及びそのタイヤ |
Country Status (4)
Country | Link |
---|---|
US (3) | US7302836B2 (ja) |
EP (1) | EP1526367A4 (ja) |
JP (1) | JP4231254B2 (ja) |
WO (1) | WO2004013596A1 (ja) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4231254B2 (ja) * | 2002-08-02 | 2009-02-25 | 横浜ゴム株式会社 | タイヤの歪み状態検出方法、歪み状態検出装置及びそのタイヤ |
FR2861869A1 (fr) * | 2003-11-05 | 2005-05-06 | Michelin Soc Tech | Procede d'extraction d'au moins une grandeur caracterisant un signal periodique, et application. |
US7082819B2 (en) * | 2003-12-09 | 2006-08-01 | Michelin Recherche Et Technique S.A. | Doppler radar for detecting tire abnormalities |
JP2006170686A (ja) * | 2004-12-14 | 2006-06-29 | Sumitomo Electric Ind Ltd | タイヤ状態検出装置、タイヤ状態検出方法、タイヤ及びアンテナ |
JP4663385B2 (ja) * | 2005-04-18 | 2011-04-06 | 株式会社ブリヂストン | 回転体表面の凹凸データ補正方法 |
US7832264B2 (en) * | 2005-04-26 | 2010-11-16 | Sanyo Electric Co., Ltd. | Tire sensor system and vehicle body having the same mounted thereon |
JP4686603B2 (ja) * | 2005-06-22 | 2011-05-25 | パーデュ リサーチ ファンデーション | 一体的な寿命検出能力を有する構造 |
US7284417B2 (en) * | 2005-07-28 | 2007-10-23 | Reynolds Charles W | Tire monitor |
FR2891770B1 (fr) * | 2005-10-06 | 2007-12-07 | Michelin Soc Tech | Procede et dispositif de mesure de pression de gonflage d'un pneumatique au moyen d'un capteur de contrainte |
DE102006014058B4 (de) * | 2006-03-27 | 2008-04-17 | Mähner, Bernward | Vorrichtung und Verfahren zum optischen Prüfen eines Reifens |
JP4939210B2 (ja) * | 2006-12-28 | 2012-05-23 | 住友ゴム工業株式会社 | タイヤの前後力検出方法、及びそれに用いる空気入りタイヤ |
WO2008150894A2 (en) | 2007-05-29 | 2008-12-11 | Paul E. Hawkinson Company | Tire defect tester |
US8281827B2 (en) * | 2008-11-06 | 2012-10-09 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
FR2992453B1 (fr) * | 2012-06-22 | 2014-07-04 | Ldl Technology | Dispositif de communication d'un systeme de surveillance des roues d'un vehicule et procede de communication |
GB2510434A (en) * | 2013-02-05 | 2014-08-06 | Schrader Electronics Ltd | Pulse width measuring method for use in e.g. a tyre monitor |
US9076272B2 (en) * | 2013-05-28 | 2015-07-07 | Infineon Technologies Ag | Wheel speed sensor and interface systems and methods |
BR112017013646A2 (pt) * | 2014-12-31 | 2018-03-06 | Bridgestone Americas Tire Operations Llc | detecção de desgaste por radar para aplicações de pneus |
US10365184B2 (en) | 2015-06-30 | 2019-07-30 | Paul E. Hawkinson Company | Electrical discharge testing system |
CN107817117B (zh) * | 2017-12-01 | 2023-10-27 | 吉林大学 | 一种轮胎力学特性实时测量装置及其测量方法 |
DE102018206963B3 (de) | 2018-05-04 | 2019-04-25 | Audi Ag | Verfahren zur Ermittlung einer absoluten Geschwindigkeit eines weiteren Verkehrsteilnehmers und Kraftfahrzeug |
JP7057206B2 (ja) | 2018-05-07 | 2022-04-19 | Toyo Tire株式会社 | タイヤ歪検出方法 |
US11733126B2 (en) | 2021-07-07 | 2023-08-22 | Paul E. Hawkinson Company | Tire defect detection system that images localized cooling at a defect |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4953393A (en) * | 1986-07-04 | 1990-09-04 | Philip Elliot Galasko | Transducer |
EP0832765A2 (en) * | 1996-09-27 | 1998-04-01 | Motorola, Inc. | Tyre pressure monitoring system |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4326976A1 (de) * | 1993-08-11 | 1995-02-16 | Manfred Ludewig | Verfahren und Vorrichtung zum Überwachen von Fahrzeugreifen |
DE19646251C2 (de) * | 1996-11-08 | 1998-11-12 | Continental Ag | Luftreifen mit Mitteln zur Beschaffung von Informationen, seine Verwendung und Vorrichtung zu seiner Herstellung |
DE19820877C2 (de) * | 1998-05-09 | 2002-09-19 | Contitech Luftfedersyst Gmbh | Berührungslose Abstands- und Druckmessung innerhalb einer Luftfeder |
DE19900082C2 (de) * | 1999-01-04 | 2003-09-25 | Continental Ag | Reibkraftregelsystem und Fahrzeugluftreifen mit Sensor dafür |
US6308758B1 (en) * | 1999-07-06 | 2001-10-30 | Continental Ag | Elastomeric tire having magnetized sidewall and method of manufacturing same |
US6763288B2 (en) * | 1999-07-30 | 2004-07-13 | Pirelli Pneumatici S.P.A. | Method and system for monitoring and/or controlling behavior of a vehicle by measuring deformations of its tires |
WO2001045968A1 (en) * | 1999-12-22 | 2001-06-28 | Pirelli Pneumatici S.P.A. | Method and system for monitoring the deformations of a tyre in motion |
US7150187B2 (en) * | 2000-11-27 | 2006-12-19 | Pirelli Pneumatici S.P.A. | System and method for monitoring deformations of a moving tire |
GB0211663D0 (en) * | 2002-05-21 | 2002-07-03 | Transense Technologies Plc | Tyre sensor interrogation |
US6734791B2 (en) * | 2002-07-31 | 2004-05-11 | Michelin Recherche Et Technique S.A. | Electronics component assembly in a tire for remotely monitoring tire conditions |
JP4231254B2 (ja) * | 2002-08-02 | 2009-02-25 | 横浜ゴム株式会社 | タイヤの歪み状態検出方法、歪み状態検出装置及びそのタイヤ |
JP4255048B2 (ja) * | 2002-08-02 | 2009-04-15 | 横浜ゴム株式会社 | タイヤの歪み状態検出方法、歪み状態検出装置及びそのセンサユニット並びにこれを備えたタイヤ |
JP4517610B2 (ja) * | 2003-09-16 | 2010-08-04 | トヨタ自動車株式会社 | タイヤ状態量検出装置 |
-
2002
- 2002-08-02 JP JP2002226050A patent/JP4231254B2/ja not_active Expired - Fee Related
-
2003
- 2003-07-18 EP EP03741492A patent/EP1526367A4/en not_active Withdrawn
- 2003-07-18 US US10/505,215 patent/US7302836B2/en not_active Expired - Fee Related
- 2003-07-18 WO PCT/JP2003/009169 patent/WO2004013596A1/ja active Application Filing
-
2007
- 2007-10-11 US US11/871,066 patent/US20080029192A1/en not_active Abandoned
- 2007-11-14 US US11/940,180 patent/US20080079593A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4953393A (en) * | 1986-07-04 | 1990-09-04 | Philip Elliot Galasko | Transducer |
EP0832765A2 (en) * | 1996-09-27 | 1998-04-01 | Motorola, Inc. | Tyre pressure monitoring system |
Non-Patent Citations (1)
Title |
---|
See also references of EP1526367A4 * |
Also Published As
Publication number | Publication date |
---|---|
US20080079593A1 (en) | 2008-04-03 |
JP2004069360A (ja) | 2004-03-04 |
EP1526367A4 (en) | 2006-11-22 |
US7302836B2 (en) | 2007-12-04 |
JP4231254B2 (ja) | 2009-02-25 |
US20050081613A1 (en) | 2005-04-21 |
EP1526367A1 (en) | 2005-04-27 |
US20080029192A1 (en) | 2008-02-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4231254B2 (ja) | タイヤの歪み状態検出方法、歪み状態検出装置及びそのタイヤ | |
US7385492B2 (en) | Tire distortion detecting method, distortion detector, sensor unit thereof, and tire having the same | |
US10906361B2 (en) | Sensor transmitter, wheel position detection apparatus, and tire pressure monitoring system provided with the same | |
JP2004500561A (ja) | 動作中のタイヤの変形を監視するための方法およびシステム | |
JPH0555322B2 (ja) | ||
JP3945451B2 (ja) | 車輪異常判定装置 | |
EP1680289B1 (en) | Thermal monitoring system for a tire | |
JP2005306160A (ja) | 路面摩擦係数の推定方法、路面摩擦係数推定装置、車両制御方法及びその装置 | |
JP2003520735A (ja) | 自動車の走行運動中のタイヤの変形を連続的に測定するための装置 | |
US20100131231A1 (en) | Improvements relating to vehicle sensors | |
WO2016006233A1 (ja) | 運転制御装置、自動車及び運転制御方法 | |
US20090171531A1 (en) | Wheel attitude control method and wheel attitude control device | |
JPH10297228A (ja) | タイヤ空気圧警報装置 | |
US7937204B2 (en) | Brake control method and brake control device | |
US7734388B2 (en) | Apparatus for detecting anomaly of wheel speed sensors | |
US20060219000A1 (en) | Method of detecting longitudinal force of tire and longitudinal force detecting apparatus used therein | |
WO2001094168A1 (en) | System for determining the state of shear deformation of a crown portion of a tyre during the running of a motor vehicle | |
AU2020314718B2 (en) | Vehicle tire assembly including an internal inflation height and contact patch sensor using millimeter wavelength radar | |
JP2005178697A (ja) | タイヤ異常検出装置 | |
JP2005029142A (ja) | アンチロック・ブレーキ・システム及びそのセンサユニット | |
US6967590B2 (en) | Device for continuously measuring deformations in a tire during the travel movement for a motor vehicle | |
JP2004317443A (ja) | 車輪荷重推定装置 | |
JP5339925B2 (ja) | タイヤ情報監視システム | |
US11701928B2 (en) | Rim for wheel with sensor and wheel comprising said rim | |
JP2006125892A (ja) | Saw素子によるタイヤ歪み測定システム |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 10505215 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003741492 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2003741492 Country of ref document: EP |