Radar sensor calibration techniques for hydraulic cylinders
AssigneePacoma GmbH
InventorsMartin Luessi, Jim McKee
Life of this patent
Estimating the term…
Abstract
A method, system and non-transitory machine-readable storage devices for calibrating a radar sensor used in a hydraulic cylinder includes calculating a position-dependent noise estimate. The calibration also includes setting a position-dependent threshold amplitude for piston position detection based on the calculated position-dependent noise estimate. A piston is determined to be detected at a particular position if a reflected signal received at the radar sensor exceeds the position-dependent threshold amplitude at the particular position. The calibration further includes calibrating radar measurements acquired by the radar sensor to correct for a multi-path position error.
Claims20
A method for calibrating a radar sensor used in a hydraulic cylinder, the method comprising:
- calculating a position-dependent noise estimate;
- setting a position-dependent threshold amplitude for piston position detection based on the calculated position-dependent noise estimate, wherein a piston is determined to be detected at a particular position if a reflected signal received at the radar sensor exceeds the position-dependent threshold amplitude at the particular position;
- and
- calibrating radar measurements acquired by the radar sensor to correct for a multi-path position error.
A system comprising:
- at least one processor;
- and
- one or more storage devices communicatively coupled to the at least one processor, the one or more storage devices storing instructions which, when executed by the at least one processor, cause the at least one processor to perform operations comprising:
- calculating a position-dependent noise estimate;
- setting a position-dependent threshold amplitude for piston position detection based on the calculated position-dependent noise estimate, wherein a piston is determined to be detected at a particular position if a reflected signal received at a radar sensor exceeds the position-dependent threshold amplitude at the particular position;
- and
- calibrating radar measurements acquired by the radar sensor to correct for a multi-path position error.
One or more non-transitory machine-readable storage devices having encoded thereon computer readable instructions for causing one or more processing devices to perform operations for calibrating a radar sensor used in a hydraulic cylinder, wherein the operations comprise:
- calculating a position-dependent noise estimate;
- setting a position-dependent threshold amplitude for piston position detection based on the calculated position-dependent noise estimate, wherein a piston is determined to be detected at a particular position if a reflected signal received at the radar sensor exceeds the position-dependent threshold amplitude at the particular position;
- and
- calibrating radar measurements acquired by the radar sensor to correct for a multi-path position error.
Dependencies are inferred from the claim text.