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1. (WO2019017436) ROAD SURFACE CONDITION ESTIMATION METHOD AND ROAD SURFACE CONDITION ESTIMATION DEVICE
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Pub. No.: WO/2019/017436 International Application No.: PCT/JP2018/027116
Publication Date: 24.01.2019 International Filing Date: 19.07.2018
IPC:
G01M 17/02 (2006.01) ,B60C 19/00 (2006.01) ,B60W 40/068 (2012.01)
G PHYSICS
01
MEASURING; TESTING
M
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
17
Testing of vehicles
007
of wheeled or endless-tracked vehicles
02
of tyres
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
C
VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
19
Tyre parts or constructions not otherwise provided for
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
W
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
40
Estimation or calculation of driving parameters for road vehicle drive control systems not related to the control of a particular sub-unit
02
related to ambient conditions
06
Road conditions
068
Road friction coefficient
Applicants:
株式会社ブリヂストン BRIDGESTONE CORPORATION [JP/JP]; 東京都中央区京橋三丁目1番1号 1-1, Kyobashi 3-chome, Chuo-ku, Tokyo 1048340, JP
Inventors:
真砂 剛 MASAGO Takeshi; JP
Agent:
宮園 靖夫 MIYAZONO Yasuo; JP
Priority Data:
2017-14022119.07.2017JP
Title (EN) ROAD SURFACE CONDITION ESTIMATION METHOD AND ROAD SURFACE CONDITION ESTIMATION DEVICE
(FR) PROCÉDÉ D'ÉVALUATION D'ÉTAT DE REVÊTEMENT ROUTIER ET DISPOSITIF D'ESTIMATION D'ÉTAT DE REVÊTEMENT ROUTIER
(JA) 路面状態推定方法及び路面状態推定装置
Abstract:
(EN) This road surface condition estimation device is provided with: an acceleration sensor 11 which detects an acceleration in a tire diameter direction; an acceleration waveform extraction means 12 which extracts an acceleration waveform from the acceleration; a differential waveform calculation means 13 which calculates a differential waveform of the acceleration waveform; a rotation time calculation means 14 which calculates a rotation time of a tire from the differential waveform; a standardized acceleration waveform creation means 15 which creates a standardized acceleration waveform by using the rotation time of the tire; and a road surface condition estimation means 16 which determines whether a water infiltration state between the tire and the road surface is shifted to a hydroplaning state.
(FR) Selon l'invention, un dispositif d'estimation d'état de revêtement routier comprend : un capteur d'accélération (11) qui détecte une accélération dans une direction diamétrale de pneumatique ; un moyen d'extraction de forme d'onde d'accélération (12) qui extrait une forme d'onde d'accélération à partir de l'accélération ; un moyen de calcul de forme d'onde différentielle (13) qui calcule une forme d'onde différentielle de la forme d'onde d'accélération ; un moyen de calcul de temps de rotation (14) qui calcule un temps de rotation d'un pneumatique à partir de la forme d'onde différentielle ; un moyen de création de forme d'onde d'accélération normalisée (15) qui crée une forme d'onde d'accélération normalisée en utilisant le temps de rotation du pneumatique ; et un moyen d'estimation d'état de revêtement routier (16) qui détermine si un état d'infiltration d'eau entre le pneumatique et le revêtement routier passe à un état d'aquaplanage.
(JA) タイヤ径方向加速度を検出する加速度センサ11と、加速度から加速度波形を抽出する加速度波形抽出手段12と、加速度波形の微分波形を算出する微分波形算出手段13と、微分波形からタイヤの回転時間を算出する回転時間算出手段14と、タイヤの回転時間を用いて、基準化加速度波形を作成する基準化加速度波形作成手段15と、タイヤと路面との間への水浸入状態が、ハイドロプレーニング状態に移行する状態であるか否かを判定する路面状態推定手段16とを備える路面状態推定装置。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)