Device and method for adjusting a signal for an object detector
US11493426B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2020 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | Jan 13, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/1486
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An object counting device adjusts a signal to account for noise to improve object counting accuracy. A controller receives an electromagnetic radiation (e.g., light) intensity signal from radiation detectors and determines that its value is within a voltage threshold, thereby indicating that no object is passing through the radiation. The controller determines a derivative of the signal and that the derivative is less than a derivative threshold level for at least a predefined time. The controller then updates a base noise floor value to be the value of the radiation intensity signal to account for particles within a path of the electromagnetic radiation to improve an object counting accuracy. In some embodiments, the processor can scale the received radiation intensity signal in accordance with the updated base noise floor value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.