Distance measuring device and method for calibrating a distance measuring device
US6509864B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2002 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Feb 17, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/931
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a distance measuring device. A transmitting part (E) for electromagnetic radiation especially radar radiation, emits measuring pulses (A, B) which are controlled by a pulse generator (1), and a receiving part (8) is switched to a ready-to-receive mode after a certain, adjustable delay (TDELAY, before a next measuring pulse is emitted, for receiving a reflected pulse during a time gate (18). The aim of the invention is to provide a calibration process taking into account all practical defects. To this end, the pulse generator (1) produces pulses with a multiple of the frequency with which the measuring pulses are repeated and a calibrating cycle in which calibrating pulses (&tgr;0 to &tgr;9) are produced with pulses generated by the pulse generator (1), controlled by the transmitting part (5), is carried out at longer intervals in time. The calibrating pulses (&tgr;0 to &tgr;9) are received directly in the receiving part (8) and the delay time (TDELAY) In the receiving part is regulated in such a way that a generated calibrating pulse (&tgr;0) to &tgr;9) is received directly by the received directly by the receiving part (8) during a time gate (18).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.