A device for measuring rotation including an NMR gyroscope having a sensing axis, a computer, a generating member configured to generate a magnetic field directed along the sensing axis, and a MEMS gyroscope rigidly connected to the NMR gyroscope, the MEMS gyroscope having a sensing axis aligned with the sensing axis of the NMR gyroscope, the MEMS gyroscope being suitable for delivering a MEMS signal representing a rotation about the sensing axis, the computer being configured to calculate, from an NMR signal output by the NMR gyroscope, information relating to a rotation about the sensing axis, and to analyse the MEMS signal over time in order to determine a current cut-off frequency, the computer also being configured to control the generating member in order to generate, over time, a magnetic field of which the amplitude is a function of the current cut-off frequency.

A device for measuring rotation including an NMR gyroscope having a sensing axis, a computer, a generating member configured to generate a magnetic field directed along the sensing axis, and a MEMS gyroscope rigidly connected to the NMR gyroscope, the MEMS gyroscope having a sensing axis aligned with the sensing axis of the NMR gyroscope, the MEMS gyroscope being suitable for delivering a MEMS signal representing a rotation about the sensing axis, the computer being configured to calculate, from an NMR signal output by the NMR gyroscope, information relating to a rotation about the sensing axis, and to analyse the MEMS signal over time in order to determine a current cut-off frequency, the computer also being configured to control the generating member in order to generate, over time, a magnetic field of which the amplitude is a function of the current cut-off frequency.

A method for detecting rotation of a carrier utilizes a device embedded in said carrier that comprises an enclosure containing a gaseous mixture of an alkali metal and a noble gas. The method includes a step of starting up (DEM-MEOP) the device during which the noble gas is polarised by utilizing metastability exchange optical pumping. The start-up step is followed by a step of acquisition (MES-SEOP) by the device of a signal representative of said rotation during which the noble gas is maintained polarised by utilizing spin exchange optical pumping. The invention extends to the device and to an inertial navigation unit integrating said device and to an inertial navigation method implementing the method for detecting rotation of the carrier.

A physics package apparatus for a compact atomic device includes a container having a plurality of slots and an open end, a first vapor cell carrier slidably seated in one of the plurality of slots, a vapor cell coupled to the first vapor cell carrier; and a lid sealably enclosing the open end so that the vapor cell is sealably enclosed in the container.

A physics package apparatus for a compact atomic device includes a container having a plurality of slots and an open end, a first vapor cell carrier slidably seated in one of the plurality of slots, a vapor cell coupled to the first vapor cell carrier; and a lid sealably enclosing the open end so that the vapor cell is sealably enclosed in the container.

The invention relates to a navigational aid method for an inertial navigation system including at least one inertial sensor (4) having a sensitive axis (X-X), each inertial sensor (4) comprising an ASG gyroscope (8) able to deliver an ASG signal representative of a rotation about the corresponding sensitive axis (X-X), and a MEMS gyroscope (10) able to deliver a MEMS signal representative of a rotation about the corresponding sensitive axis (X-X), the method including the steps of: between a first date and a subsequent third date, calculating a path from the MEMS signals; from the third date, calculating the path from the ASG signals; estimating a bias vector introduced by the MEMS gyroscopes (10), from the MEMS signals and ASG signals; at a fourth date subsequent to the third date, resetting the path.

One example includes a method for fabricating a compound material. The method includes providing a first discrete material layer having a first thickness dimension. The first discrete material layer includes a first material having a first magnetic susceptibility. The method also includes depositing a second discrete material layer having a second thickness dimension over the first discrete material layer. The second discrete material layer can include a second material having a second magnetic susceptibility. The relative first and second thickness dimensions can be selected to provide a desired magnetic susceptibility of the compound material.

According to one embodiment, a sensor includes a base body, a first fixed portion, a movable portion, and first and second fixed electrodes. The first fixed portion is fixed to the base body. The movable portion is supported by the first fixed portion. The movable portion includes annular portions and connecting portions. The annular portions are concentric with the first fixed portion as a center in a first plane. One of the connecting portions connects one of the annular portions and an other one of the annular portions. The annular portions include first to third annular portions. The second annular portion includes a first movable portion electrode. The first fixed electrode is fixed to the base body and faces a part of the first annular portion. The second fixed electrode is fixed to the base body and faces the first movable portion electrode.

According to one embodiment, a sensor includes a base body, a first fixed portion, a movable portion, and first and second fixed electrodes. The first fixed portion is fixed to the base body. The movable portion is supported by the first fixed portion. The movable portion includes annular portions and connecting portions. The annular portions are concentric with the first fixed portion as a center in a first plane. One of the connecting portions connects one of the annular portions and an other one of the annular portions. The annular portions include first to third annular portions. The second annular portion includes a first movable portion electrode. The first fixed electrode is fixed to the base body and faces a part of the first annular portion. The second fixed electrode is fixed to the base body and faces the first movable portion electrode.

A magnetometer unit which may be incorporated in an electronic device receives first magnetic response data from a first magnetic sensor and second magnetic response data from a second magnetic sensor displaced from the first magnetic sensor. The magnetometer unit generates a composite response surface representation from the first magnetic response data and the second magnetic response data, and stores the composite response surface representation in a non-transitory memory.