Patent · US Active

Ultrasonic passenger detection

US8791839B2 · kind B2 · utility

7Cited by

21References

10Claims

0Family size

Assignee

WABTEC HOLDING CORP. · US

Inventors

James W. Citta · Lombard, US
Robert Urman · Schaumburg, US

Key dates

Filing date	May 13, 2009
Grant date	Jul 29, 2014
Priority date	—
Expiry date	Oct 5, 2031

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE05Y2900/51
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method and apparatus of recognizing the presence of a passenger in front of a door of a transit vehicle comprises directing an ultrasound transmitter/receiver at a volume of space adjacent the door, emitting an ultrasound pulse into the empty volume, recording and integrating intensity of the echoes and storing the integrated value as a standard value, repeatedly emitting an ultrasound pulse into the volume, and comparing the integrated values to the standard value.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.