Mehrkanalige Laufzeitmessungsvorrichtung mit Time-To-Digital-Converter in einem Programmierbaren Integrierten Schaltkreis

Details

Veröffentlichungs-Nr.

EP4006576

Aktenzeichen

EP20210724

Anmeldetag

30. November 2020

Veröffentlichung

22. Januar 2025

Erteilung

22. Januar 2025

Rechtsraum

EP

IPC

G01S7/487G01S7/4865G01S7/481

Abstract

The invention relates to a multi-beam distance measuring device (1, 1'), configured for timing the time-of-flight of transmission pulses (16) by using a programmable integrated circuit (6), e.g. a field-programmable gate array (FPGA), which has a plurality of parallel delay lines (7). Each delay line (7) has a plurality of delay elements (22), which sequentially propagate an input signal (200) of the respective delay line (7), wherein each of the delay elements (22) is configured to provide a binary output as a function of the input signal (200). Time measurement of a signal change of a return signal (8) is carried out by sampling binary outputs of a respective delay line (7) and simultaneous consideration of the sampled binary outputs at a certain point in time, by further taking into account individual time delays of the delay elements (22). The measurement device (1, 1') further comprises a reference generator (11) configured to generate a reference signal (12) having a known reference signal change, wherein the reference signal (12) is asynchronous to a sampling clock (24) driving the sampling of the binary outputs. A selector (13) is used to alternatingly feed individual ones of the delay lines (7) with the reference signal (12) instead of a return signal (8). By carrying out a statistical analysis of the sampled binary outputs that correspond to the reference signal (12) that propagated through a delay line (7) individual time delays of the delay elements (22) of this delay line (7) are determined, which individual time delays are taken into in the time measurement of the signal change when the delay line (7) is fed with one of the return signals (8).

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Firmen

Hexagon Innovation Hub GmbH
Hexagon Technology Center GmbH

Land

🇨🇭 Schweiz

Fachgebiete