# US 11,442,078 B2 · Mounting direction determination device and mounting direction determination method of acceleration sensor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,442,078 B2 - Document ID: US11442078B2 - Status: Granted - Kind: B2 - Application number: 16/767,982 - Filed: 2018-09-13 - Published: 2021-04-15 - Granted: 2022-09-13 - Earliest claimed: 2017-11-29 - Assignees: Daimler AG - Applicants: Daimler AG - Inventors: Tetsuro Koseki - Web page: https://patentgrep.com/patent/US11442078B2 ## CPC - G01P 15/18: in two or more dimensions - G01P 1/023: {for acceleration measuring devices} - G01P 21/00: Testing or calibrating of apparatus or devices covered by the preceding groups - G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G}) ## Abstract A mounting direction determination device and a mounting direction determination method of an acceleration sensor which can automatically determine the direction of the acceleration sensor mounted on a vehicle. The mounting direction determination device determines a mounting direction, relative to a vehicle, of the acceleration sensor that is capable of detecting a first acceleration in a first direction and a second acceleration in a second direction. A mounting direction determination unit determines the mounting direction by comparing values actually measured by the acceleration sensor with determination reference data. The determination reference data specifies a combination of the detection results of the first acceleration and the second acceleration and the mounting directions. ## Claims ### Claim 1 A mounting direction determination device of an acceleration sensor for determining a mounting direction of the acceleration sensor with respect to a vehicle, the acceleration sensor being capable of respectively detecting a first acceleration in a first direction and a second acceleration in a second direction that intersects the first direction, the mounting direction determination device comprising: a storage unit for storing determination reference data that specifies a combination of detection results of the first acceleration and the second acceleration and a mounting direction of the acceleration sensor on the vehicle; and a mounting direction determination unit for determining a mounting direction of the acceleration sensor with respect to the vehicle by comparing actually measured values of the first acceleration and the second acceleration detected by the acceleration sensor with the determination reference data stored in the storage unit, wherein the acceleration sensor is mounted such that one of the first direction and the second direction is a vehicle front-back direction, while the other of the first direction and the second direction is a vehicle width direction, and the mounting direction determination unit determines the mounting direction of the acceleration sensor with respect to the vehicle when only one of the first acceleration and the second acceleration has a non-zero value, whereas the mounting direction determination unit does not determine the mounting direction when both of the first acceleration and the second acceleration have a non-zero value or when both of the first acceleration and the second acceleration have a zero value. ### Claim 2 (depends on 1) The mounting direction determination device of an acceleration sensor according to claim 1, wherein the mounting direction determination unit determines the mounting direction of the acceleration sensor with respect to the vehicle during acceleration of the vehicle. ### Claim 3 (depends on 1) The mounting direction determination device of an acceleration sensor according to claim 1, wherein the mounting direction determination unit determines the mounting direction of the acceleration sensor with respect to the vehicle during deceleration of the vehicle. ### Claim 4 (depends on 1) The mounting direction determination device of an acceleration sensor according to claim 1, wherein the mounting direction determination unit determines whether or not the mounting direction determined during acceleration of the vehicle is matched with the mounting direction determined during deceleration of the vehicle. ### Claim 5 (depends on 4) The mounting direction determination device of an acceleration sensor according to claim 4, further comprising an initial setting unit for performing an initial setting of the acceleration sensor based on the mounting direction, determined by the mounting direction determination unit, wherein the initial setting unit performs the initial setting based on the mounting direction when the mounting direction determination unit determines that the mounting direction determined during acceleration of the vehicle is matched with the mounting direction determined during deceleration of the vehicle. ### Claim 6 (depends on 4) The mounting direction determination device of an acceleration sensor according to claim 4, wherein the initial setting unit performs the initial setting based on the mounting direction in a case where the number of times when the mounting direction determination unit determines that the mounting direction determined during acceleration of the vehicle is matched with the mounting direction determined during deceleration of the vehicle exceeds a predetermined value. ### Claim 7 (depends on 1) The mounting direction determination device of an acceleration sensor according to claim 1, wherein the acceleration sensor is incorporated in a control unit mounted on the vehicle. ### Claim 8 A mounting direction determination method of an acceleration sensor for determining a mounting direction of the acceleration sensor with respect to a vehicle, the acceleration sensor being capable of respectively detecting a first acceleration in a first direction and a second acceleration in a second direction that intersects the first direction, the method comprising the steps of: previously preparing determination reference data that specifies a combination of detection results of the first acceleration and the second acceleration and mounting directions of the acceleration sensor on the vehicle; acquiring actually measured values of the first acceleration and the second acceleration detected by the acceleration sensor; and determining a mounting direction of the acceleration sensor with respect to the vehicle by comparing the actually measured values of the first acceleration and the second acceleration with the determination reference data, wherein the acceleration sensor is mounted such that one of the first direction and the second direction is a vehicle front-back direction, while the other of the first direction and the second direction is a vehicle width direction, and the mounting direction of the acceleration sensor with respect to the vehicle is determined when only one of the first acceleration and the second acceleration has a non-zero value, whereas the mounting direction is not determined when both of the first acceleration and the second acceleration have a non-zero value or when both of the first acceleration and the second acceleration have a zero value. ### Claim 9 (depends on 8) The mounting direction determination method of an acceleration sensor according to claim 8, wherein the step of determining the mounting direction includes the steps of: determining the mounting direction during acceleration of the vehicle; determining the mounting direction during deceleration of the vehicle; and determining whether the mounting direction determined during acceleration is matched with the mounting direction determined during deceleration. ### Claim 10 (depends on 9) The mounting direction determination method of an acceleration sensor according to claim 9, further comprising the step of: performing the initial setting of the acceleration sensor based on the mounting direction in a case where the number of times when the mounting direction determined during the acceleration is matched with the mounting direction determined during the deceleration exceeds a predetermined value.