189results about "Turn-sensitive devices" patented technology

The invention relates to a hemispherical resonator and hemispherical gyroscope parameter and defect identification system and method, and belongs to the technical field of hemispherical resonator gyroscopes. According to the invention, automatic identification of damping non-uniformity, rigidity non-uniformity and 1-3-order quality defect parameters is respectively carried out on the fused quartz hemispherical resonator before and after film coating and the gyroscope header after base assembly, so that the full-flow coverage test of the hemispherical resonator gyroscope is realized; various parameters are identified in the whole process from harmonic oscillator machining forming to the gauge outfit state, the testing precision, the system reusability, the operation convenience and consistency are greatly improved, and the production efficiency is improved.

The application belongs to the field of optical precision manufacturing, and relates to a bottom-up atomic gas chamber manufacturing device and manufacturing method. The device is composed of a vacuum cavity, a pumping pipeline, a gas inlet pipeline, a discharge electrode plate set, an insulating support, a gas chamber, a laser, an alkali metal source and a vacuum gauge. The device is used for manufacturing the atomic gas chamber from bottom to top, and can be used for preparing various gas chambers with different gas pressure ratio requirements, thereby helping to realize customized preparation. The device reduces the disadvantages of impurity adsorption on the inner wall of the gas chamber and reduces uncontrollable risks. The device has high integration, high preparation efficiency and large secondary development space, and is favorable for accelerating the technical iteration of the atomic gas chamber and the cross-generation development of key technologies such as nuclear magnetic resonance gyroscopes, atomic clocks and magnetometers.

The present disclosure is directed to a device configured to detect whether the device is in a bag or outside of the bag. The device determines whether the device is in or outside of the bag based on distance measurements generated by at least one proximity sensor and motion measurements generated by at least one motion sensor. By using both distance measurements and motion measurements, the device is able to detect whether the device is in the bag or outside of the bag with high accuracy and robustness.

A vibration-type angular velocity sensor (100) includes a primary side control circuit (2) and a secondary side control circuit (3) which are configured so that a function as the primary side control circuit (2) and a function as the secondary side control circuit (3) are interchangeable, in which an offset value after interchange and an offset value before interchange are symmetric values with respect to a predetermined reference value.

A kind of atomic gyroscope pumping rate stable composite control method based on phase reshaping extended state observer and power approaching sliding mode control.Aiming at the problems that standard linear extended state observer has steady-state estimation error under the action of ramp disturbance, disturbance estimation phase lag and it is difficult to balance between observation bandwidth improvement and noise sensitivity, a composite corrector composed of lead network and lag network is cascaded at the output end of disturbance estimation of extended state observer, the disturbance estimation channel is shaped in frequency domain, phase lead is provided in mid-frequency band to reduce compensation delay, amplitude lag characteristic is used to suppress high-frequency noise, and parameter constraint design is used to realize zero-error estimation of ramp disturbance;At the same time, a power approaching sliding mode controller is constructed to improve the adaptability to the nonlinear, internal and external coupling and parameter uncertainty of atomic gyroscope system, and the phase reshaping extended state observer is combined to effectively estimate and feed forward compensate the lumped disturbance, so as to improve the stability and accuracy of pumping rate control.The present application can balance dynamic anti-disturbance performance, steady-state control accuracy, convergence speed and noise robustness without significantly improving the observation bandwidth, and is suitable for atomic gyroscope precision control system affected by ultra-low frequency slowly varying disturbance.

The invention relates to the technical field of gyroscopes, and discloses a frequency hopping gyroscope, which comprises a first connecting switch, a second connecting switch, a first driving comb tooth electrode and a second driving comb tooth electrode, when the angular velocity in the first direction is detected, the two driving mass blocks are switched between two driving modes of same-direction driving motion and reverse-direction driving motion, and when the angular velocity in the third direction is detected, the two detection mass blocks are switched between two detection modes of same-direction detection motion and reverse-direction detection motion; and the second connection switch is configured to be capable of changing the polarities of the first detection comb tooth electrode and the second detection comb tooth electrode of the detection electrodes on the detection mass block with the detection direction changing. According to the frequency hopping gyroscope disclosed by the invention, the problem that the existing gyroscope generally adopts a fixed working frequency is solved, the working frequency of the gyroscope can be changed, and the frequency hopping gyroscope has relatively high safety performance.

The application relates to the technical field of lasers, in particular to a semiconductor laser for a quantum gyroscope and a preparation method thereof. The semiconductor laser for the quantum gyroscope comprises a stacking structure, the stacking structure comprises an N-type substrate, an N-type cladding layer, an N-type waveguide layer, an active region, a first P-type waveguide layer and a waveguide structure which are stacked in a first direction in sequence, and the waveguide structure comprises a low-duty-cycle V-shaped groove grating, a multimode interference coupling beam splitting waveguide, a gain waveguide array, a multimode interference coupling beam combining waveguide, a high-duty-cycle V-shaped groove grating and a micro-tapered waveguide which are arranged and connected in a second direction in sequence. The application is favorable for realizing the semiconductor laser for the quantum gyroscope with high power and narrow linewidth under the premise of reducing the complexity of the device structure.

Method for the precise measurement operation of a micromechanical angular rate sensor, comprising at least one deflectably suspended seismic mass (1, 15, 20), at least one drive device for driving the seismic mass (1, 15, 20) and at least one first (2, 11, 18) and one second (3, 12, 19) trim electrode element, which are directly or indirectly jointly assigned to the seismic mass (1, 15, 20), wherein a first electrical trim voltage (U) is applied between the first trim electrode element (2, 11, 18) and the seismic mass (1, 15, 20). TO1 , U TLO1 , U TRO1 , U TU2 , U T1H , U T2V ) and a second electrical trim voltage (U) between the second trim electrode element (3, 12, 19) and the seismic mass (1, 15, 20) TO2 , U TLO2 , U TRO2 , U TU1 , U T2H , U T1V) are set, whereby the first and second electrical trim voltages depend at least on a quadrature parameter (U). T ) and a resonance parameter (U f ) are set, characterized by the fact that the first (U TO1 , U TLO1 , U TRO1 , U TU2 , U T1H , U T2V ) and the second (U TO2 , U TLO2 , U TRO2 , U TU1 , U T2H , U T1V ) electrical trim voltage is set so that the sum of the square of the first electrical trim voltage (U) TO1 , U TLO1 , U TRO1 , U TU2 , U T1H , U T2V ) multiplied by a first constant factor (α) and from the square of the second electrical trim voltage (U) TO2 , U TLO2 , U TRO2 , U TU1 , U T2H , U T1V) multiplied by a second constant factor (β), is kept constant and / or is based on a first reference value of the resonance parameter (U) f ) is set to the square.

Micromechanical structure (1), in particular a gyroscope, comprising a substrate (2) having a principal extension plane (100), a first detection mass element (11) and a second detection mass element (21), wherein the first detection mass element (11) is provided to be excitable by a first drive element (10) to a first vibration (101) parallel to the principal extension plane (100), wherein the second detection mass element (21) is provided to be excitable by a second drive element (20) to a second vibration (201) antiparallel to the first vibration (101), wherein a first Coriolis deflection of the first detection mass element (11) along a third direction (Z) perpendicular to the principal extension plane (100) is detectable by a first detection means,wherein a second Coriolis deflection of the second detection mass element (21) along the third direction (2) is detectable by a second detection means and wherein the first and the second detection mass elements (11, 21) are coupled to each other by means of a first coupling element (3), characterized in that the first detection mass element (11) is designed as a first rocker structure (11') and the second detection element (21) as a second rocker structure (21'), wherein the first and second rocker structures (11' and 21') are attached to the first and second drive elements (10 and 20) by means of a first and second torsion spring (13 and 23, respectively), respectively, wherein the first and second torsion axis (13' and 23') of the first and second torsion spring (13, 23) are parallel to the first and second directions (X, 2, 3, 4, 5, 6, 7, 8, 9, 10 ...Y) is provided and the first or second rocker structure (11' or 21') has an asymmetric mass distribution with respect to the first or second torsion axis (13' or 23'), wherein the first and / or the second torsion spring (13, 23) are designed as a conductor spring, wherein the first and / or the second torsion spring (13, 23) are designed as a double conductor spring.

This disclosure relates to an inertial sensor for measuring an inertial quantity along a sensing axis. The sensor comprises an atom interferometer comprising a pulse generator to generate one or more pulsed light beams, defined by a respective pulse duration to place atoms into a superposition, and re-combine the atoms to measure an interference of the atoms and calculate the inertial quantity based on the measured interference. The sensor further comprises an auxiliary acceleration sensor configured to measure acceleration transverse to one or more of the pulsed light beams; and a control system configured to calculate a transversal offset of the atoms relative to the pulsed light beams caused by the measured acceleration transverse to the one or more of the light beams, increase the pulse durations, and adjust the pulse timings to compensate for a reduced beam intensity applied to the atoms as a result of the transversal offset.

The present application relates to a kind of range extension system and method of cold atom interference gyro, utilize the output information of cold atom interference gyro and optical gyro, the maximum likelihood method is used to estimate the extension period number of cold atom interference gyro phase, the extension period number is fused with the output of cold atom interference gyro, obtain two cold atom interference gyro extension output value, the obtained two cold atom interference gyro extension output value is compared with optical gyro output value, with the absolute value minimum of difference value as judging basis, only uniqueness is judged, obtain final angular velocity.The present application fuses the advantages of cold atom interference gyro and optical gyro, solves the contradiction of large range and high resolution of angular velocity measurement, can realize angular velocity large range and high resolution measurement.Simultaneously, since the dynamic measurement range is small, the problem that cold atom interference gyro cannot be used for inertial navigation is solved, and a technical foundation for cold atom interference gyro used for inertial navigation is laid.

This invention belongs to the technical field of micro inertial measurement unit (MMU) structure design, and discloses a miniaturized MMU structure resistant to high overload. It includes: an upper buffer energy-absorbing material, a lower buffer energy-absorbing material, an upper shell, a lower shell, and a core adhesive block; both the upper and lower shells are disc-shaped structures with a through hole in the center to accommodate the core adhesive block; four threaded holes are provided around the perimeter for fixing the upper and lower shells; the upper buffer energy-absorbing material is disposed on the upper surface of the upper shell, and the lower buffer energy-absorbing material is disposed on the lower surface of the lower shell; the upper and lower buffer energy-absorbing materials are used to seal the core adhesive block within the upper and lower shells and for buffering and shock absorption; the core adhesive block includes an adhesive material and a micro inertial measurement unit circuit unit sealed within the adhesive material.

This invention relates to a high-precision data acquisition, processing, and magnetic field drive system, mainly comprising a data acquisition module, a processing module, a magnetic field drive module, a power supply module, and a host computer. The data acquisition module converts external analog signals into digital signals and transmits them to the processing module. The processing module includes a processing unit, a high-stability temperature-controlled crystal oscillator, an external clock signal interface, a DDR chip, Flash memory, a high-speed connector, and a digital power supply module. This module performs digital processing such as filtering and phase-locked loop (PLL) on the signals. The host computer can communicate with the FPGA core processing module via both Ethernet and serial ports to control the bias, amplitude, and frequency of the signals generated by the magnetic field drive module, display the read-back online data, and generate real-time curves. This invention realizes a low-cost, high-precision NMR gyroscope magnetic field control system, achieving high-precision closed-loop control of the NMR gyroscope's magnetic field.

A System for Measuring Body Kinetics includes a wearable device configured to be wrapped around a joint. A microprocessor is attached to the wearable device. One or more Inertial Measurement. Units (IMUs) are connected to the microprocessor and arranged on the wearable device. The IMUs are arranged and configured to provide kinetic data concerning the joint to the microprocessor. A wireless transmission component is connected to the microprocessor. The microprocessor is configured to receive kinetic data from the IMUs, and to transmit the kinetic data by way of the wireless transmission component to a central processor or other device. An algorithm resides within the microprocessor or the central processor or other device, and is configured to determine the position of each IMU from the kinetic data. The wearable device may be constructed of fabric, strap, adhesive tape, or a combination thereof.

The application discloses a method for real-time suppression of zero bias drift and improvement of zero bias stability of a symmetrical gyroscope, which comprises the following steps: after a micro-electro-mechanical gyroscope is powered on, the working mode of the micro-electro-mechanical gyroscope is periodically exchanged, a damping angle is obtained by real-time identification during the mode exchange, and the damping angle is added to the mode angle of the corresponding working mode after the mode exchange. The application is applied to the field of micro-electro-mechanical gyroscopes, and the damping axis deflection angle error of the mode deflection micro-electro-mechanical gyroscope is identified and corrected on-line, and the traditional mode exchange technology of the gyroscope is combined skillfully, so that the application does not need to introduce any physical mechanism, has no special requirement on the processing technology of the gyroscope, is easy to operate, is stable and reliable, does not introduce additional test and calibration steps, can realize real-time self-calibration and self-compensation of the zero bias output of the gyroscope, improves the zero bias stability of the gyroscope and the repeatability of the gyroscope, and can effectively meet the demand of the military and civilian markets on high-precision micro-electro-mechanical gyroscopes.

Some embodiments of the present disclosure provide atom beam interferometry. MTL beams are directed to respective MTL regions along a 3D-cooled atom beam. Within each MTL region, the respective MTL beam coherently imparts photon recoil momenta to atoms of the atom beam to produce an interference signal in the atom beam. The MTL beams are switched between first and second cases providing first and second interfering trajectory paths for the atom beam, and the atom beam is continuously directed through the MTL regions while switching the MTL beams. Atoms from the atom beam are received along the first and second interfering trajectory paths at a detection region. State-dependent responses from the atoms of the atom beam are induced in the detection region to provide data of atomic states occupied by the atoms. The data of the atomic states is translated into an interferometry measurement. Related interferometers are also disclosed.

The present disclosure relates to an inertial sensor for measuring an amount of inertia along a sensing axis. The sensor includes an atom interferometer including a pulse generator for generating one or more pulsed light beams defined by respective pulse durations to place atoms in superposition and recombine the atoms to measure interference of the atoms, the one or more pulsed light beams being configured to generate one or more pulsed light beams, the one or more pulsed light beams being defined by respective pulse durations, the one or more pulsed light beams being defined by respective pulse durations, and the one or more pulsed light beams being defined by respective pulse durations, the one or more pulsed light beams being defined by respective pulse durations. And calculating the amount of inertia based on the measured interference. The sensor further includes an auxiliary acceleration sensor configured to measure acceleration transverse to one or more of the pulsed light beams; and a control system configured to calculate a lateral offset of the atoms relative to the pulsed light beam caused by the measured acceleration transverse to the one or more of the light beams, increase the pulse duration, and adjusting the pulse timing to compensate for a reduced beam strength applied to the atoms due to the lateral offset.

Disclosed is a MEMS device, comprising: a movable electrode plate; a first electrode plate and a third electrode plate on a first side of the movable electrode plate; a second electrode plate and a fourth electrode plate on a second side of the movable electrode plate. The first electrode plate, the second electrode plate, the third electrode plate and the fourth electrode plate respectively form a first capacitor, a second capacitor, a third capacitor, a fourth capacitor with the movable electrode plate, the first capacitor and the second capacitor are connected to a detection circuit, the third capacitor and the fourth capacitor are connected to a reference circuit, an output of the detection circuit and an output of the reference circuit are connected to an input of a divider for eliminating nonlinear relationship between the output voltage of the detection circuit and the displacement of the movable electrode plate.

Optical frequency reference apparatus (10) comprising - an atomic vapor cell (1), containing a vapor of reference atoms, said atomic vapor cell (1) comprising a first end (41) having a first window (4) and a second end (61), - a laser source (11) for generating a laser probe beam (3) adapted to excite a two-photon optical transition of said reference atoms, - an optical detector (14), adapted to detect a fluorescence signal emitted by said reference atoms, and - at least one reflective element (5, 15) wherein the laser source (11), the atomic vapor cell (1) and the at least one reflective element (5, 15) are configured such that, in operation, the probe beam (3) enters the atomic vapor cell (1) through said first window (4) at said first end (41) and crosses said vapor of reference atoms until said second end (61) through a defined optical path in a first forward direction (3a), the probe beam (3) is reflected backwards by said at least one reflective element (5, 15) and crosses said vapor of reference atoms a second time through the same defined optical path, in a second direction (3b) opposite to the first forward direction (3a), characterized in that the optical frequency reference apparatus (10) further comprises means (7, 9) for absorbing the reflected laser probe beam (3) exiting from the atomic vapor cell (1) according to the second direction (3b).

The application provides a gyro vibration displacement detection device and method, which comprises generation of high-frequency bipolar square wave, modulation of gyro vibration displacement, amplification of signals and demodulation of gyro vibration displacement signals, and is implemented through corresponding circuit modules. The application modulates the gyro vibration displacement signals to a carrier frequency higher than the gyro resonance frequency, avoids the influence of circuit noise and environmental noise on the gyro displacement detection precision and the crosstalk problem of the driving signal through the parasitic capacitance, and avoids the defects of complex circuit, high cost and the like caused by the high-frequency sine wave as the carrier, has the characteristics of low implementation circuit price, less digital circuit resource occupation, simple carrier generation circuit, no need of filter for extracting the gyro vibration displacement, and is suitable for high-performance Coriolis vibration gyro and other vibration body high-precision vibration displacement detection.

The present invention provides an MEMS gyroscope and an electronic product. The MEMS gyroscope comprises a plurality of first mass blocks, a second mass block and coupling parts, wherein the plurality of first mass blocks are located at two opposite sides of the second mass block in a first direction; and each coupling part comprises a coupling link and a plurality of connecting beams connected to two ends of the coupling link, the connecting beams are flexible beams, and the coupling part is positioned between the first mass blocks and the second mass block and connects the first mass blocks with the second mass block. Through the arrangement of the coupling links, strong coupling can be realized between the first mass blocks and the second mass block, so that the anti-interference performance of the MEMS gyroscope is enhanced during work and the working stability is improved.

The self-heating electrode holder comprises a holder body and a ceramic part, the holder body is horizontally arranged, a mounting hole is formed in the middle of the holder body, the ceramic part is arranged at the lower end of the holder body in a composite mode, and an electric connection circuit and an electric heating device are composited in the ceramic part. The electric connection circuit is provided with a power input end and a signal output end, and the electric heating device is electrically connected with the electric connection circuit. The electric connecting circuit and the electric heating device are integrated on the ceramic piece, so that the whole self-heating electrode holder does not need additional wiring, and meanwhile, the self-heating electrode holder also has a heating function.

The application discloses a multiplexing measurement and control method and device of a three-axis micromechanical gyroscope, which comprises the following steps: firstly, a global clock is generated; in the working clock of any gyroscope, an alternating current driving signal, a feedback force signal, a preset reference phase signal and a reference displacement signal are outputted to the gyroscope by a coordinate rotation digital computer, and the gyroscope reaches a force balance state through a driving modal control loop and a detection modal control loop, and the angular velocity of the gyroscope is obtained; the three gyroscopes multiplex the same coordinate rotation digital computer in the respective working clock. The application combines time division multiplexing with a coordinate rotation digital computer algorithm, and can accurately and synchronously detect and close-loop control the three-axis micromechanical gyroscope in real time in limited field programmable logic gate array resources. The method and device can be widely applied to concurrent processing requirements of multi-axis or multi-path high-speed, high-precision and high-integration measurement and control instruments.

The invention relates to an atomic vapor cell (2), comprising: a substrate (8) having a window (8a), the substrate (8) preferably being made of silicon, a first and a second optical component (9a, 9b) arranged on opposite sides of the substrate (8), the window (8a) in the substrate (8) together with the optical components (9a, 9b) delimiting an atomic vapor chamber (7). The second optical component (9b) has a reflective surface (12a), preferably made of silicon, configured to reflect pump light propagating within the atomic vapor chamber (7), in particular at least a portion of a laser beam (4) that enters the atomic vapor chamber (7) from the first optical component (9a). The invention also relates to a sensor device (1) comprising such an atomic vapor cell (2).

The invention discloses a human-computer interaction variable-parameter full-electric-control frame gyroscope. The gyroscope comprises a three-axis motion gyroscope unit and an electric control module, the three-axis motion gyroscope unit comprises an outer frame which is fixedly arranged; the middle frame is rotationally connected to the interior of the outer frame; the inner frame is rotationally connected to the interior of the middle frame; the rigid body is rotationally connected to the interior of the inner frame; the driving parts respectively drive the first shaft, the second shaft and the third shaft; the angle sensor is used for detecting the rotating states of the middle frame, the inner frame and the rigid body; the electric control module comprises an electric control box and a man-machine interaction module, and the electric control box is in electric communication connection with the man-machine interaction module. A multi-layer nested structure of the outer frame, the middle frame, the inner frame and the rigid body is adopted, and independent rotation in a three-dimensional space is achieved; each shaft is provided with an independent driving piece and an angle sensor, through precise feedback control, the motion control precision is remarkably improved, and the high-precision attitude control requirement can be met.

The invention provides an automatic adjustment method and system for carrier and closed-loop phases in a nuclear magnetic resonance gyroscope, and the method comprises the steps: building phase locking judgment standards based on amplitude proportionality coefficient, 129Xe nuclear spin locking signal amplitude and 131Xe nuclear spin locking signal amplitude maximization; a carrier phase center, a 129Xe closed-loop phase center and a 131Xe closed-loop phase center of the embedded alkali metal magnetometer are respectively determined through frequency sweeping operation, modulation signals which have different frequencies and are far away from a working frequency band are applied near the phase centers, and corresponding direct-current demodulation signal errors are obtained through real-time demodulation. And three independent PID controllers are used for processing the demodulation signal errors respectively, generating phase compensation quantities and feeding back and adjusting corresponding phases, and decoupling, automatic locking and real-time optimization of the three phases are achieved.

The present invention relates to an atom sensor system (1) comprising a vapor cell (2) comprising an alkali metal vapor, a pump laser system (3) configured to generate an optical pump beam (4) along a first axis (5) through the vapor cell (2), a magnetic field system (6) configured to generate a magnetic field along the first axis (5) through the vapor cell (2), and a probe laser system (7) configured to generate an optical probe beam (8) along a second axis (9) through the vapor cell (2). The present invention is based on the general idea that the atom sensor system (1) comprises a Fabry-Pérot resonator (10), wherein the alkali metal vapor of the vapor cell (2) is located inside the Fabry-Pérot resonator (10).

A system (30) for controlling, regulating or authenticating a timer comprises means (31) for measuring the frequency signal and / or rate of one or more timers based on a time reference provided by an optical atomic clock (10) comprising an atomic vapor chamber (1), the atomic vapor chamber (1) comprises a hermetically sealed enclosure (8) defining a volume containing a vapor of a reference atom (2), the hermetically sealed enclosure (8) comprising an optical inlet (3) allowing transmission of a probe beam adapted to excite an optical transition of the reference atom (2) and an optical outlet (4) allowing transmission of a fluorescence signal from the reference atom (2), the hermetically sealed housing (8) further comprises a wall (5) through which the fluorescent signal can penetrate, said wall (5) being coated on its outer side with a coating (6) which is reflective to the fluorescent signal.

The application relates to a method for suppressing transient output error of a hemispherical resonator gyro under a reciprocating active precession condition of a standing wave, and relates to the technical field of inertia. The application is aimed at solving the problem of unstable error suppression effect of the existing hemispherical resonator gyro output error suppression method. The application comprises the following steps: obtaining gyro output angular velocity by using the elliptical second-order vibration displacement of a hemispherical resonator under a stable state, and performing preliminary error suppression on the gyro output angular velocity; performing phase compensation and lead correction on the gyro angular velocity signal after the preliminary error suppression, so as to obtain the gyro angular velocity signal after MPA error suppression; taking the gyro angular velocity after the MPA error suppression as a tracking reference, performing trajectory planning on the standing wave active precession, constructing an error suppression optimization problem, and solving the error suppression optimization problem, so as to obtain the final gyro angular velocity signal after error suppression. The application is used for suppressing the output error of the gyro under the reciprocating active precession condition of the standing wave.

The invention relates to a method for determining a change in position of a diamond gyroscope comprising the following steps: The method is based on the understanding that, under normal conditions, the nuclear spin of NV centers cannot usually be directly polarized and read out. However, the electron spin of the NV centers can be polarized and read out using optical methods, for example, ODMR. The nuclear spin population of the NV centers is converted into an electron spin population of the NV centers in order to read it out using ODMR and thereby determine the change in position. The invention relates to a system for determining a change in position of a diamond gyroscope having NV centers, a computer program and a machine-readable storage medium.