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:
Oct. 14, 2025
Filed:
Jul. 30, 2020
Ams Sensors Asia Pte Ltd., Singapore, SG;
Stephan Beer, Schaffhausen, CH;
AMS Sensors Asia PTE LTD., Singapore, SG;
Abstract
We disclose a method of measuring a distance to or from a target, the method comprising: operating an emitter to generate a first pulsed signal and a second pulsed signal in a field of view of the emitter in which a target may be present, the first pulsed signal having a first pulse frequency and the second pulsed signal having a second pulse frequency, the first pulse frequency being different from the second pulse frequency; operating a detector to detect signals for a pre-determined duration after said first pulsed signal is generated and for a pre-determined duration after said second pulsed signal is generated; storing said detected signals in a memory spanning a period of the first pulsed signal and a period of the second pulsed signal, respectively; using the detected signals to identify a portion of the first pulsed signal reflected by the target and a portion of the second pulsed signal reflected by the target; determining a first virtual distance based on a difference between a reference signal and the detection of the portion of the first pulsed signal reflected by the target; determining a second virtual distance based on a difference between the reference signal and the detection of the portion of the second pulsed signal reflected by the target; and determining the distance to the target based on a virtual difference corresponding to a difference between the first virtual distance and the second virtual distance.