# US 2019/0168549 A1 · Tire-mounted sensor, diagnosis history memory device and diagnosis notification device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168549 A1 - Document ID: US20190168549A1 - Status: Published application - Kind: A1 - Application number: 16/324,132 - Filed: 2017-06-23 - Published: 2019-06-06 - Earliest claimed: 2016-08-12 - Assignees: Denso Corporation - Applicants: Denso Corporation - Inventors: Ryosuke KANBAYASHI; Takatoshi SEKIZAWA; Masashi MORI - Web page: https://patentgrep.com/patent/US20190168549A1 ## CPC - B60C 23/04: mounted on the wheel or tyre - B60C 19/00: Tyre parts or constructions not otherwise provided for - B60C 23/0493: {for attachment on the tyre} - B60C 23/064: {comprising tyre mounted deformation sensors, e.g. to determine road contact area} - B60R 16/023: for transmission of signals between vehicle parts or subsystems - B60T 8/1725: {Using tyre sensors, e.g. Sidewall Torsion sensors [SWT] (for tyre pressure and temperature detection B60C23/00)} - G01M 17/02: Tyres - B60C 2019/004: {Tyre sensors other than for detecting tyre pressure} - B60T 2270/406: Test-mode; Self-diagnosis - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR ## Abstract A condition in which an abnormality can occur in a tire is accurately detected on the basis of a detection signal from an acceleration sensor used to detect a road surface state and a possibility that an abnormality has occurred in the tire is also detected. In addition, the detection result is stored as a diagnosis history. The diagnosis history or the possibility that an abnormality has occurred in the tire are notified through a notification device in a vehicle body side system so that a user is informed in advance of the possibility that an abnormality has occurred in the tire. In addition, when the diagnosis history is checked through a tool in a car repair shop, etc., the diagnosis history stored in a tire-mounted sensor is read out. Accordingly, the possibility of abnormality of the tire can be informed also in the car repair shop, etc. ## Claims ### Claim 1 A tire-mounted sensor attachable to a back surface of a tire comprising: a vibration detection unit for outputting an output voltage corresponding to a magnitude of vibration of the tire as a detection signal; and a signal processing unit for detecting an application of impact shock to the tire based on a change in an output voltage waveform indicated by the detection signal of the vibration detection unit and detecting a possibility of occurrence of abnormality of the tire by comparison of the output voltages outputted before and after a detection of the application of impact shock. ### Claim 2 A tire-mounted sensor attachable to a back surface of a tire comprising: a vibration detection unit for outputting an output voltage corresponding to a magnitude of vibration of the tire as a detection signal; a pressure sensor for detecting a tire air pressure inside the tire; and a signal processing unit for detecting an application of impact shock to the tire based on a change in the tire air pressure and detecting a possibility of occurrence of abnormality of the tire by comparison of the output voltages of the vibration detection unit outputted before and after a detection of the application of impact shock. ### Claim 3 (depends on 2) The tire-mounted sensor according to claim 2, wherein: the signal processing unit detects the application of impact shock to the tire when the tire air pressure which has changed returns to the tire air pressure present before the detection of the change in the tire air pressure. ### Claim 4 (depends on 1) The tire-mounted sensor according to claim 1, wherein: the signal processing unit detects the application of the impact shock to the tire when the output voltage waveform increases to be larger than a basic waveform, which is set to be the output voltage waveform outputted when a vehicle travels a flat road, by more than a predetermined value. ### Claim 5 (depends on 1) The tire-mounted sensor according to claim 1, wherein: the signal processing unit detects the possibility of occurrence of abnormality of the tire by comparing the output voltage waveforms, which are outputted during one rotation of the tire before and after the detection of application of the impact shock, or comparing frequency analysis results of the output voltage waveforms. ### Claim 6 (depends on 1) The tire-mounted sensor according to claim 1, further comprising: a memory unit for storing the possibility of abnormality of the tire as a diagnosis history upon detection of the possibility of abnormality of the tire. ### Claim 7 (depends on 6) The tire-mounted sensor according to claim 6, further comprising: a receiver unit for receiving an instruction command supplied from an external side; and a transmitter unit for transmitting data related to the diagnosis history, wherein the control unit reads out the diagnosis history stored in the storage unit upon a reception of the instruction command by the receiver unit and sends the data related to the diagnosis history to be transmitted from the transmitter unit. ### Claim 8 (depends on 7) A diagnosis notification device comprising: the tire-mounted sensor according to claim 7 and including the transmitter unit for transmitting the data related to the diagnosis history; a receiver and a notification device, which are provided in a vehicle body side for receiving the data related to the diagnosis history and for executing a notification of the data related to the diagnosis result, respectively. ### Claim 9 A diagnosis history storage device comprising: a tire-mounted sensor attached to a back surface of a tire and including a vibration detection unit for outputting an output voltage corresponding to a magnitude of vibration of the tire as a detection signal, a signal processing unit for generating data of an output voltage waveform indicated by the detection signal of the vibration detection unit and a transmitter unit for transmitting data of the output voltage waveform; and a receiver and a vehicle side system, which are provided in a vehicle body side, wherein the receiver receives the data of the output voltage waveform, and the vehicle side system detects an application of impact shock to the tire based on a change in the output voltage waveform indicated by the data of the output voltage waveform, detects a possibility of occurrence of abnormality of the tire by comparison of the output voltages outputted before and after the detection of the application of impact shock and stores the possibility of abnormality of the tire as a diagnosis history. ### Claim 10 (depends on 9) A diagnosis notification device comprising: the diagnosis history storage device according to claim 9; and a notification device for executing a notification of data related to the diagnosis history. ### Claim 11 (depends on 2) The tire-mounted sensor according to claim 2, wherein: the signal processing unit detects the application of the impact shock to the tire when the output voltage waveform increases to be larger than a basic waveform, which is set to be the output voltage waveform outputted when a vehicle travels a flat road, by more than a predetermined value. ### Claim 12 (depends on 2) The tire-mounted sensor according to claim 2, wherein: the signal processing unit detects the possibility of occurrence of abnormality of the tire by comparing the output voltage waveforms, which are outputted during one rotation of the tire before and after the detection of application of the impact shock, or comparing frequency analysis results of the output voltage waveforms. ### Claim 13 (depends on 2) The tire-mounted sensor according to claim 2, further comprising: a memory unit for storing the possibility of abnormality of the tire as a diagnosis history upon detection of the possibility of abnormality of the tire.