The accelerometric sensor has a suspended region, mobile with respect to a supporting structure, and a sensing assembly coupled to the suspended region and configured to detect a movement of the suspended region with respect to the supporting structure. The suspended region has a geometry variable between at least two configurations associated with respective centroids, different from each other. The suspended region is formed by a first region rotatably anchored to the supporting structure and by a second region coupled to the first region through elastic connection elements configured to allow a relative movement of the second region with respect to the first region. A driving assembly is coupled to the second region so as to control the relative movement of the latter with respect to the first region.

The accelerometric sensor has a suspended region, mobile with respect to a supporting structure, and a sensing assembly coupled to the suspended region and configured to detect a movement of the suspended region with respect to the supporting structure. The suspended region has a geometry variable between at least two configurations associated with respective centroids, different from each other. The suspended region is formed by a first region rotatably anchored to the supporting structure and by a second region coupled to the first region through elastic connection elements configured to allow a relative movement of the second region with respect to the first region. A driving assembly is coupled to the second region so as to control the relative movement of the latter with respect to the first region.

A magnetic circuit assembly for an accelerometer includes an excitation ring that includes a base portion defining oppositely facing first and second sides, a ring portion extending from the second side of the base portion to define a ring recess, a first metallic inlay recessed into the first side of the base portion in which the first metallic inlay includes a material different than that of the base portion, a second metallic inlay recessed into the second side of the base portion in which the second metallic inlay includes a material different than that of the base portion, and a magnet received within the ring recess and attached to the second metallic inlay.

Reducing a sensitivity of an electromechanical sensor is presented herein. The electromechanical sensor comprises a sensitivity with respect to a variation of a mechanical-to-electrical gain of a sense element of the electromechanical sensor; and a voltage-to-voltage converter component that minimizes the sensitivity by coupling, via a defined feedback capacitance, a positive feedback voltage to a sense electrode of the sense elementthe sense element electrically coupled to an input of the voltage-to-voltage converter component. In one example, the voltage-to-voltage converter component minimizes the sensitivity by maintaining, via the defined feedback capacitance, a constant charge at the sense electrode. In another example, the electromechanical sensor comprises a capacitive sense element comprising a first node comprising the sense electrode. Further, a bias voltage component can apply a bias voltage to a second node of the electromechanical sensor. In yet another example, the electromechanical sensor comprises a piezoelectric sense element.

An optical sensor having one or more sensing interference elements is disclosed. A first detector function generates a coarse optical path difference signal for example using a discrete Fourier transform of a detected interference spectrum, and a second detector function generates a refined optical path difference signal using the coarse optical path difference signal and for example a cross correlation of the interference spectrum with one or more sets of periodic transfer functions.

An inertial measurement unit (IMU) device includes an IMU sensor, a controller, a temperature sensor electrically connected to the controller, a heat source, and a heat conductive member. The controller is configured to, in response to a temperature of the IMU sensor detected by the temperature sensor falling below a threshold temperature, control the heat source to generate heat. The heat conductive member is configured to transfer heat from the heat source to the IMU sensor, and includes an electrically insulating and thermally conductive material.

Reducing a spring softening effect on a capacitive sense element of an electromechanical sensor is presented herein. A system, such as a microphone or an accelerometer, comprises an electromechanical sensor and a voltage-to-voltage converter component. The electromechanical sensor comprises a capacitive sense element and a bias voltage component that applies a bias voltage to a sense electrode of the capacitive sense element. The voltage-to-voltage converter component couples a positive feedback voltage to the sense electrode to maintain a constant charge at the sense electrode to facilitate a reduction of charge flow in the electromechanical sensor representing a spring softening effect on the capacitive sense element. In an example, the spring softening effect on the sense element alters a resonant frequency of the sense element and a gain of the sense element. In another example, the charge flow corresponds to a parasitic capacitance that is electrically coupled to the sense electrode.

An example transducer includes an upper magnetic circuit assembly including an upper excitation ring, a lower magnetic circuit assembly including a lower excitation ring, and a proof mass assembly positioned between the upper and lower magnetic circuit assemblies. A coefficient of thermal expansion (CTE) of the proof mass assembly is lower than a CTE of each of the upper and lower excitation rings. The transduces also includes an outer support structure coupled to an outer surface of each of the upper and lower excitation rings, and the outer support structure includes at least one cutout configured to reduce a circumferential stiffness of the outer support structure.

An electrical connector includes a main body portion, connection portions, a total pressure acquisition portion and a static pressure acquisition portion. The connection portions are configured to allow the main body portion to be electrically connected to a charged element provided in a flow channel. The total pressure acquisition portion includes a total pressure measuring hole provided in a first part, facing a flow direction of fluid, of the main body portion. The static pressure acquisition portion includes a static pressure measuring hole provided in a second part, parallel to the flow direction of the fluid, of the main body portion. The fluid state test device and the fluid heat exchange system having the electrical connector are also provided. Thus, the original flow field where the electrical connector of the electrode of the electric heat source is located may not be changed, which avoids destruction to the flow field

A physical quantity sensor device includes a physical quantity sensor and a storage. The storage stores a first constant used as a constant of each term in an approximate polynomial to obtain a first secondary frequency temperature characteristic approximated to the actual frequency temperature characteristic, in a first temperature region less than the first boundary temperature, and a second constant used as a constant of each term in the approximate polynomial to obtain a second secondary frequency temperature characteristic approximated to the actual frequency temperature characteristic, in a second temperature region equal to or greater than the first boundary temperature.