Patent classifications
G01L1/086
Force feedback loop for pressure sensors
A pressure sensor system comprises a force feedback loop. The force feedback loop is configured to receive a measured pressure sensor signal and generate a feedback signal based on the measured pressure and an electrostatic force. The electrostatic force is generated based on the feedback signal and combined with the measured force keeping the resultant sensor signal stable.
FORCE MEASURING DEVICE WITH CURRENT CONTROL CIRCUIT
A force measuring device based on the principle of electromagnetic force-compensation is disclosed. The device includes an electronic circuit driven by direct current, which includes an inductor. A control unit of the device controls the current flowing through the inductor and thereby also the compensation force, where the controlling is responsive to the force to be measured. The device also includes a means for providing a measurement output indicative of the force to be measured. Controlling the current includes dynamic switching between two switch states associated with the two conduction directions of the inductor.