Patent · US Expired

Ranging method and apparatus

US4770526A · kind A · utility

42Cited by

3References

12Claims

0Family size

Assignee

Messerschmitt Bolkow Blohm GmbH · DE

Inventors

Sigmund Manhart · Haar, DE
Peter Dyrna · Haar, DE
Bernd Kunkel · Phoenix, US

Key dates

Filing date	Nov 12, 1986
Grant date	Sep 13, 1988
Priority date	—
Expiry date	Nov 12, 2006

Classification

Technology area (CPC G)Physics
CPC primaryG01S7/4818
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A radar ranging system uses a laser transmitter and a single detector for producing the start and stop signals for the time interval measurement. Two reference signals are produced by passing two light portions, decoupled from the laser light to be transmitted to a target, through two different delay lines to the detector. The time difference between the first reference signal and a target signal is a measure for the range to be measured. The time difference between the two reference signals is used as a calibration measure for repeatedly calibrating the system. The true range is calculated by forming the ratio of the two time intervals.

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