DISTANCE MEASUREMENT SYSTEMS AND METHODS

A laser scanner can include a light source to output laser pulses, and an optical sensor to generate analog signals, having a first dynamic range, from light of the laser pulses that is reflected by an object. A logarithmic amplifier can amplify the analog signals to have a second dynamic range that...

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Bibliographische Detailangaben
1. Verfasser:	SCHLEIFER, Fred, Freybler
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES BASIC ELECTRONIC CIRCUITRY CALCULATING CODE CONVERSION IN GENERAL CODING COMPUTING CONTROL OF AMPLIFICATION COUNTING DECODING DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	A laser scanner can include a light source to output laser pulses, and an optical sensor to generate analog signals, having a first dynamic range, from light of the laser pulses that is reflected by an object. A logarithmic amplifier can amplify the analog signals to have a second dynamic range that is smaller than the first dynamic range. An analog to digital converter can convert the analog signals to digital signal samples having a signal sample rate. A template can represent an expected return reflection signal, and can have a template sample rate that is higher than the signal sample rate. A processor can perform a cross-correlation between the digital signal samples and the template, determine a time-of-flight value based at least in part on the cross-correlation, and determine a distance to the object based at least in part on the time-of-flight value.