Magnetic automotive lamp current sensor
US5041761A · kind A · utility
19Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1990 |
| Grant date | Aug 20, 1991 |
| Priority date | — |
| Expiry date | Sep 14, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/207
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic automotive lamp current sensor has a coil 12 connected in series with an automotive lamp 14 (FIG. 2). The coil is mounted on a core 15 having a channel 16 through which the turns of the coil pass an has an opening 18 in which a magnetic flux sensor 20 is inserted. Whenever the lamp is powered and functioning, a current flows through the coil inducing a magnetic field in the core which concentrates in the opening. The flux sensor detects the magnetic field and generates an output which is regulated by a transistor 50 to drive an automotive circuit 53 that monitors the operation of the lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.