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:
May. 06, 1997
Filed:
Feb. 21, 1995
Jun Nishino, Saitama, JP;
Katsuyuki Fukuda, Saitama, JP;
Kansei Corporation, Saitama, JP;
Abstract
A distance measuring equipment which is useful in, for example, a collision prevention system wherein a laser beam is forward emitted from a vehicle to measure a distance between the vehicle and a forward vehicle, and an alarm is produced when the present vehicle abnormally approaches the forward vehicle. In the distance measuring equipment, when a correction instruction signal is supplied, a distance calculating circuit first drives an optically shielded light emitting element for correction to emit light, and produces a correction signal on the basis of a signal input into an adder connected to a light receiving element. Thereafter, the distance calculating circuit drives a light emitting element for measurement to emit light, and produces a distance measurement signal with referring the correction signal.