The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 1989
Filed:
Apr. 23, 1987
Applicant:
Inventor:
Seppo Ovaska, Hyvinkaa, FI;
Assignee:
Elevator GmbH, Baar, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ;
U.S. Cl.
CPC ...
342 28 ; 187132 ;
Abstract
This disclosure concerns a procedure for counting the number of stopping objects, such as persons who are coming to wait for an elevator or equivalent. The movements and stopping of the objects are followed by the aid of at least one Doppler radar, whose output signal amplitude changes are used to identify the change of velocity of the objects. The number of objects stopping is calculated from the magnitude of the amplitude changes and/or from the number of Doppler radar pulses recorded.