EP 2787493 A1 20141008 - Spot communication equipment for vehicle
Title (en)
Spot communication equipment for vehicle
Title (de)
Punktkommunikationseinrichtung für Fahrzeuge
Title (fr)
Équipement de communication ponctuel pour véhicule
Publication
Application
Priority
JP 2013063196 A 20130326
Abstract (en)
For example, possible shaking of a vehicle varies positional relations between an on-board communication device and a ground communication device. In such a case, a magnetic field intensity of a signal from the ground communication device received by the on-board communication device may fluctuate across a threshold beyond which the on-board communication device determines that the vehicle has entered a communication range of the ground communication device and that the vehicle has exited the communication range. When this phenomenon occurs, the on-board communication device detects one ground communication device a plurality of times, thus hindering normal vehicle control. For a threshold of the magnetic field intensity for determining detection of the ground communication device, the on-board communication device has two types of thresholds for low speed traveling, that is, a first threshold that is a ground communication device entry side threshold and a second threshold that is a ground communication device exit side threshold. The thresholds thus have a hysteresis property that resists noise, thus preventing possible misdetection of the ground communication device during low speed traveling.
IPC 8 full level
G08G 1/01 (2006.01); B61L 3/12 (2006.01); G08G 1/042 (2006.01); G08G 1/048 (2006.01); G08G 1/133 (2006.01); G08G 1/052 (2006.01)
CPC (source: EP)
B61L 3/121 (2013.01); B61L 25/021 (2013.01); G08G 1/042 (2013.01); G08G 1/048 (2013.01); G08G 1/133 (2013.01); G08G 1/052 (2013.01)
Citation (search report)
- [AD] JP 2010070021 A 20100402 - KYOSAN ELECTRIC MFG
- [A] US 3334224 A 19670801 - ALLEN ROBERT K, et al
- [A] JP 2004122911 A 20040422 - NIPPON SIGNAL CO LTD
- [A] ANDERTON W E: "Computers, communication and high speed railways", WIRELESS WORLD, 1 August 1975 (1975-08-01), pages 348 - 353, XP001390128
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2787493 A1 20141008; EP 2787493 B1 20180829; CN 104071034 A 20141001; CN 104071034 B 20160817; IN 413DE2014 A 20150612; JP 2014191357 A 20141006; JP 5887294 B2 20160316
DOCDB simple family (application)
EP 14154853 A 20140212; CN 201410051595 A 20140214; IN 413DE2014 A 20140214; JP 2013063196 A 20130326