Pressure/force sensors having a flexible membrane, dynamic and static pressure/force sensor calibration methods

摘要

An implantable pressure sensor that wirelessly provides pressure data to a wireless receiver. The pressure sensor includes a first flexible membrane exposed to the region whose pressure is being monitored. In contact with this first flexible membrane is a force transducer, for measuring this pressure, that is itself suspended on an internal flexible membrane. This internal flexible membrane allows the force transducer to not only be displaced away from the first flexible membrane, but it allows for the force transducer to also be oscillated, either out-of-contact with the first flexible membrane or in-contact therewith for static/dynamic pressure sensor calibration. Another embodiment suspends an internal housing on a third flexible membrane wherein the internal flexible membrane forms the upper surface of the internal housing. An actuator for displacing/oscillating the force transducer is located within the internal housing. This permits establishing a constant distance between the force transducer and the actuator.