Diagnostic element for validation of bolt detection of a guard locking switch in a static state
US11328548B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2020 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Sep 15, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/958
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system for sensing a position of a locking bolt of an industrial locking switch includes an inductive circuit, a converter, and a master controller. The inductive circuit includes an inductive coil and a capacitor electrically connected in parallel. The inductive coil is positioned to receive a locking bolt of an industrial locking switch when the locking bolt is transitioned to a lock position. The converter is configured to convert a frequency of a current signal on the inductive circuit to a digital frequency value. The master controller is configured to generate a bolt detection signal in response to determining that the digital frequency value changes by an amount equal to or substantially equal to a defined frequency shift corresponding to a frequency shift induced by the inductive coil in response to presence of the locking bolt within the inductive coil's magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.