Apparatus for detecting seated condition for toilet seat
US5625294A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 18, 1994 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Nov 18, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94026
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus for detecting seated condition for toilet seat which detects whether the change in input voltage of determining circuit, over predetermined time, in response to electrostatic capacity is existed or not. When the change is existed, the present apparatus computes and renews the set value 1 for detecting un-seated condition and the set value 2 for detecting seated condition based on the changed input potential. Accordingly, the present apparatus is the apparatus for detecting whether a human is seated or un-seated on a toilet seat using electrostatic capacity and the present invention can reduce the error in detection caused by the change in electrostatic capacity owing to a person, temperature and humidity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.