Fluid sensing system
US6335690B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Aug 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2073
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fluid sensing system for monitoring a fluid parameter within a fluid container includes a fluid sensor and a fluid receiver. The fluid sensor is positioned at a first location and is operable to sense the fluid parameter. The fluid receiver is positioned at a second location remote from the first location and within proximity to the fluid sensor. The fluid receiver includes an amplifier having a feedback path. The amplifier is in a waiting non-oscillating mode when the fluid sensor is not electromagnetically coupled to the fluid receiver and in an active oscillating mode when the fluid sensor is electromagnetically coupled to the fluid receiver, such that feedback in the feedback path is one of either a substantially zero feedback and a negative feedback when the amplifier is a waiting non-oscillating mode and said feedback path is a positive feedback when said amplifier is in an active oscillating mode. This fluid sensing system is capable of monitoring various fluid parameters such as fluid level and fluid type within the fluid container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.