Title:
OBSTACLE DETECTION DEVICE, METHOD OF CALCULATING HUMIDITY CORRECTION VALUE, AND METHOD OF DETERMINING ULTRASONIC WAVE RECEPTION THRESHOLD
Document Type and Number:
Japanese Patent JP2016191614
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an obstacle detection device capable of individually making correction for humidity conditions while minimizing an increase in size and cost of the device, and to provide a method of calculating a humidity correction value and a method of determining an ultrasonic wave reception threshold.SOLUTION: An obstacle detection device 100 calculates an outside air humidity correction value on the basis of: a travel distance of a vehicle measured based on an output of a vehicle speed sensor 30; a first time period (travel time t) it takes for an ultrasonic wave transmitted from an ultrasonic element 10 at a starting point of a travel distance measurement to be reflected by an obstacle and received by the ultrasonic element; a second time period (travel time t) it takes for an ultrasonic wave transmitted from the ultrasonic element 10 at a finishing point of the travel distance measurement to be reflected by the obstacle and received by the ultrasonic element; and temperature of outside air surrounding the vehicle detected by an outside air temperature sensor 50.SELECTED DRAWING: Figure 1
More Like This:
Inventors:
NOJIRI ATSUSHI
Application Number:
JP2015071368A
Publication Date:
November 10, 2016
Filing Date:
March 31, 2015
Export Citation:
Assignee:
PANASONIC IP MAN CORP
International Classes:
G01S7/526; G01S15/10; G01S15/93
Attorney, Agent or Firm:
Koichi Washida
Previous Patent: A RFID tag for temperature surveies
Next Patent: An N2O analysis device and an analysis method
Next Patent: An N2O analysis device and an analysis method