# US 10,245,903 B2 · Communication device mounting position determination system and determination apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,245,903 B2 - Document ID: US10245903B2 - Status: Granted - Kind: B2 - Application number: 15/559,494 - Filed: 2016-03-17 - Published: 2018-04-26 - Granted: 2019-04-02 - Earliest claimed: 2015-03-27 - Assignees: Autonetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd. - Applicants: AutoNetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd. - Inventors: Kenji Matsuoka - Web page: https://patentgrep.com/patent/US10245903B2 ## CPC - B60C 23/0416: {allocating a corresponding wheel position on vehicle, e.g. front/left or rear/right} - B60C 23/0437: {Means for detecting electromagnetic field changes not being part of the signal transmission per se, e.g. strength, direction, propagation or masking} - B60C 23/045: {Means for detecting electromagnetic field changes being not part of the signal transmission per se, e.g. strength, direction, propagation or masking} - G01S 3/14: Systems for determining direction or deviation from predetermined direction {(aerial arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00; combinations of different interacting aerial units for giving a desired directional characteristic H01Q21/29; aerials or aerial systems providing at least two radiation patterns H01Q25/00)} - G01S 5/0284: {Relative positioning} - G01S 5/14: Determining absolute distances from a plurality of spaced points of known location - H04B 17/318: Received signal strength - G01S 2205/01: specially adapted for specific applications - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES - 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 - H04B: TRANSMISSION ## Abstract A communication device mounting position determination system and apparatus are provided configured to limit where a device can be installed in a vehicle. An ECU transmits an LF signal from an LF antenna to sensor units. The sensor units receive and detect the signal strength. The sensor units transmit a UHF signal to the ECU having information including the signal strength of the LF signal. The ECU detects the signal strength of the UHF signals. For example, on the basis of the signal strength of the LF signal, the ECU makes a determination as to which of the wheels is the transmission source of the UHF signal, with respect to the left-right direction of the body of the vehicle. Further, on the basis of the signal strength of the UHF signal received by the ECU, the ECU makes the determination with respect to the front-rear direction of the vehicle. ## Claims ### Claim 1 A communication device mounting position determination system comprising a communication device provided in each of wheels of a vehicle and a determination apparatus, provided in a vehicle body of the vehicle, including a determination unit that exchanges wireless signals with the communication devices and determines which of the vehicle wheels is provided with the communication device from which the wireless signal has been received, wherein the determination apparatus includes: a vehicle body-side transmission unit that transmits a first wireless signal in a first frequency band to the communication devices; a vehicle body-side receiving unit that receives a second wireless signal in a second frequency band transmitted by the communication devices; and a vehicle body-side signal strength detection unit that detects a signal strength of the second wireless signal received by the receiving unit, wherein each of the communication devices includes: a wheel-side receiving unit that receives the first wireless signal transmitted by the determination apparatus; a wheel-side signal strength detection unit that detects a signal strength of the first wireless signal received by the receiving unit; and a wheel-side transmission unit that transmits, in the second wireless signal, information including the signal strength detected by the signal strength detection unit, and wherein the determination unit determines which wheel is provided with the communication device from which the vehicle body-side receiving unit has received the second wireless signal on the basis of the signal strength of the second wireless signal detected by the vehicle body-side signal strength detection unit and the signal strength included in the second wireless signal received by the vehicle body-side receiving unit. ### Claim 2 (depends on 1) The communication device mounting position determination system according to claim 1, wherein the vehicle is provided with four of the wheels, the wheels being provided on the front- and rear- left and right of the vehicle body; and the determination unit: determines a direction in which the communication device that is the transmission source of the second wireless signal received by the vehicle body-side receiving unit is provided with respect to one of a front-rear direction of the vehicle body and a left-right direction of the vehicle body, on the basis of the signal strength of the first wireless signal included in the second wireless signal received by the vehicle body-side receiving unit; and determines a direction in which the communication device that is the transmission source of the second wireless signal received by the vehicle body-side receiving unit is provided with respect to the other of the front-rear direction of the vehicle body and the left-right direction of the vehicle body, on the basis of the signal strength of the second wireless signal detected by the vehicle body-side signal strength detection unit. ### Claim 3 (depends on 2) The communication device mounting position determination system according to claim 2, wherein the determination unit: determines the direction in which the communication device that is the transmission source of the second wireless signal received by the vehicle body-side receiving unit is provided with respect to the left-right direction of the vehicle body, on the basis of the signal strength of the first wireless signal included in the second wireless signal received by the vehicle body-side receiving unit; and determines the direction in which the communication device that is the transmission source of the second wireless signal received by the vehicle body-side receiving unit is provided with respect to the front-rear direction of the vehicle body, on the basis of the signal strength of the second wireless signal detected by the vehicle body-side signal strength detection unit. ### Claim 4 (depends on 3) The communication device mounting position determination system according to claim 3, wherein an antenna through which the vehicle body-side transmission unit transmits the first wireless signal is offset toward the left side or the right side of the vehicle; and an antenna through which the vehicle body-side receiving unit receives the second wireless signal is offset toward the front side or the rear side of the vehicle. ### Claim 5 (depends on 4) The communication device mounting position determination system according to claim 4, wherein two antennae through which the vehicle body-side transmission unit transmits the first wireless signal are provided, the antennae being provided on the left side and the right side of the vehicle, respectively. ### Claim 6 (depends on 1) The communication device mounting position determination system according to claim 1, wherein the first frequency band is an LF (Low Frequency) band; and the second frequency band is a UHF (Ultra High Frequency) band. ### Claim 7 A determination apparatus, provided in a vehicle body of a vehicle, including a determination unit that exchanges wireless signals with a communication device provided in each of wheels of the vehicle and determines which of the vehicle wheels is provided with the communication device from which the wireless signal has been received, the apparatus comprising: a vehicle body-side transmission unit that transmits a first wireless signal in a first frequency band to the communication devices; a vehicle body-side receiving unit that receives a second wireless signal in a second frequency band transmitted by the communication devices; and a vehicle body-side signal strength detection unit that detects a signal strength of the second wireless signal received by the receiving unit, wherein each of the communication devices detects a signal strength of the received first wireless signal and transmits, in the second wireless signal, information including the detected signal strength; and the determination unit determines which wheel is provided with the communication device from which the vehicle body-side receiving unit has received the second wireless signal on the basis of the signal strength of the second wireless signal detected by the vehicle body-side signal strength detection unit and the signal strength included in the second wireless signal received by the vehicle body-side receiving unit. ### Claim 8 (depends on 2) The communication device mounting position determination system according to claim 2, wherein the first frequency band is an LF (Low Frequency) band; and the second frequency band is a UHF (Ultra High Frequency) band. ### Claim 9 (depends on 3) The communication device mounting position determination system according to claim 3, wherein the first frequency band is an LF (Low Frequency) band; and the second frequency band is a UHF (Ultra High Frequency) band. ### Claim 10 (depends on 4) The communication device mounting position determination system according to claim 4, wherein the first frequency band is an LF (Low Frequency) band; and the second frequency band is a UHF (Ultra High Frequency) band. ### Claim 11 (depends on 5) The communication device mounting position determination system according to claim 5, wherein the first frequency band is an LF (Low Frequency) band; and the second frequency band is a UHF (Ultra High Frequency) band.