Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
COMMUNICATION AREA FORMATION SYSTEM
Document Type and Number:
Japanese Patent JP2015052514
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a communication area formation system capable of ensuring accuracy of area determination for an electronic key in a simple circuit configuration.SOLUTION: A transmission antenna 11 is directly driven with a battery voltage by directly being connected to a battery 21. When receiving an electric wave transmitted from the transmission antenna 11, an electronic key 1 measures a reception signal intensity thereof and sends measured reception signal intensity data to a vehicle 2 as a reply. A battery monitoring unit 24 monitors a battery voltage at the time of electric wave transmission from the transmission antenna 11. An intensity correction unit 25 corrects the reception signal intensity data by adding or subtracting a correction value for a battery voltage fluctuation portion to/from the reception signal intensity data received from the electronic key 1. An area determination unit 26 performs area determination for the electronic key 1 by comparing the corrected reception signal intensity with a determination threshold value thereof.

More Like This:
WO/2003/081276DEVICE FOR DETERMINING THE RELATIVE SPEED BETWEEN A TRANSMITTER AND A RECEIVER
WO/2021/020403RANGING SYSTEM, RANGING METHOD, AND COMPUTER PROGRAM
WO/2015/004267TEMPORAL ANALYSIS FOR USER SPEED ESTIMATION IN WIRELESS NETWORKS
Inventors:
EGAWA TETSUYA
Application Number:
JP2013185164A
Publication Date:
March 19, 2015
Filing Date:
September 06, 2013
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TOKAI RIKA CO LTD
International Classes:
G01S11/06; E05B49/00; H04B1/59
Attorney, Agent or Firm:
Makoto Onda
Hironori Onda



 
Previous Patent: ELECTRIC AUTOMOBILE

Next Patent: RADER SYSTEM AND PULSE TRANSMISSION/RECEPTION METHOD