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385 results about "Three axis accelerometer" patented technology

Real-Time Swimming Monitor

A wearable device for monitoring and providing real-time feedback about a swimmer's body motion and performance, in particular, body orientation and forward speed, is provided. The device comprises a three-axis accelerometer, optionally a three-axis gyroscope, a memory, and a microcontroller configured to process the sensor input, calculate a swimmer's performance and provide feedback to the swimmer through an output. The output can be an earpiece or a swimming goggle with a digital display.
Owner:LI XIPU

Intelligent basketball

A device for providing information concerning position and movement of a ball, in particular a basketball, to a user is provided. The device includes a ball having an opening therein. A sensor board is positioned within the opening in the ball. The sensor board carries a three-axis accelerometer electrically connected to a microcontroller and a transceiver. A receiver board is also provided and is located remotely from the ball. The receiver board carries a transceiver electrically connected to a microcontroller and a plug for connecting to a personal computer. The accelerometer on the sensor board continuously senses the position and acceleration of the ball. That information is then transmitted wirelessly to the receiving board by the transceivers. The position and acceleration information is then integrated in order to calculate the end position of the ball based on the position and acceleration information and previously input data on the shooter's height, distance from the basket and height of the basket. The data is then transferred to a personal computer by a USB connection for display to the shooter.
Owner:GOLD ROBERT S

High-precision three-dimensional posture inertia measurement system and method based on MEMS (Micro Electro Mechanical Systems)

The invention discloses a high-precision three-dimensional posture inertia measurement system and method based on MEMS (Micro Electro Mechanical Systems), which relate to a high-precision three-dimensional posture inertia measurement method. The system and the method disclosed by the invention aim for solving the problems that the existing three-dimensional posture inertia measurement equipment is low in cost and low in precision due to adoption of a sensor. A three-axis gyroscope sensor is used for sending measured angular speed data to an ARM (Advanced RISC Machines) processor; a three-axis accelerometer sensor is used for sending measured acceleration data to the ARM processor; a three-axis magnetometer sensor is used for sending measured magnetic strength data to the ARM processor; a temperature sensor is used for measuring and sending obtained temperature excursion data of the three-axis gyroscope sensor to the ARM processor; the ARM processor is used for processing the received data by means of front low-pass digital filtration, front-end data processing and expansion Kalman filtration respectively so as to obtain Euler angle three-dimensional posture inertia data or quaternion three-dimensional posture inertia data. The system and the method disclosed by the invention can be applied to the field of navigation control.
Owner:HARBIN INST OF TECH

Gesture, movement induction system and portable electronic apparatus using same

The invention provides an attitude of using such portable device as mobile phone and game devices etc. and a motion induction system. The system comprises a two-axis or three-axis accelerometer and a three-axis magnetic sensor such as a magnetic compass which can be arranged integrally in the portable electronic device. The attitude angle and the rotation angle of the attitude data obtained from the accelerometer and the magnetic sensor are calculated by a data processing unit, and then are changed into input signals for special application procedures of the portable electronic device.
Owner:MEMSIC SEMICON WUXI

Remote interactive pen and handwriting detection method

InactiveCN101872260ARealize the space writing functionGet rid of the defect of poor portability and inconvenient useInput/output processes for data processingHandwritingSonification
The invention discloses a remote interactive pen and a handwriting detection method. The remote interactive pen comprises a handheld end and a receiving end. The handheld end detects a writing motion characteristic quantity of a penholder by adopting a three-axis gyroscope and two three-axis accelerometers and measures the relative motion distance between the penholder and a screen or the ground by adopting ultrasonic distance measurement; and the measurement information is subjected to data fusion according to a human writing motion model, solution of the writing motion characteristic quantity and identification of writing intention so as to realize handwriting detection. The receiving end is used for receiving writing control information solved by the handheld end, handwriting information and three-dimensional motion information of a cursor. Through the application of tracking and positioning arm motion characteristics to control cursor motion, operate a window and realize distance writing function, increasing the motion detection function vertical to the projection screen direction, serving as a three-dimensional air mouse for virtual reality and the like, the remote interactive pen overcomes the defect that the conventional input equipment cannot reflect the three-dimensional motion information of the cursor, and has the characteristics of simple structure and convenient use.
Owner:张通达 +1

Monolithic integrated CMOS (Complementary Metal Oxide Semiconductor) MEMS (Micro-electromechanical Systems) multilayer metal three-axis capacitive accelerometer and manufacturing method thereof

The invention provides a monolithic integrated three-axis accelerometer and a manufacturing method thereof so as to solve the defects in structure and manufacturing technology of the existing structural capacitive accelerometer. Three layers of metal Al thin films are deposited in the direction of an axis Z so as to form a comb pair sensitive electrode; four layers of metal Al/SiO2 thin films are deposited in the directions of an axis X and an axis Y so as to form comb pair sensitive electrodes, and the accelerations of the three axis directions are detected simultaneously by a single integrated structure. The accelerometer and the manufacturing method thereof have the following positive technical effects: the interconnection stray capacitance among accelerator devices in three axis directions is lowered remarkably, and high detection accuracy and lower noise performance are realized; since the accelerometer is provided with the multiple metal layers, compared with a microaccelerometer manufactured from the same material, namely polycrystalline silicon, the accelerometer is more flexible in wiring; a foldable beam is used in the structure of the accelerometer, so that the own stress of the accelerometer is released better, and therefore the influence of the stress on the system can be reduced effectively.
Owner:HEFEI UNIV OF TECH

Micro-strapdown altitude heading reference system and working method thereof

The invention relates to a micro-strapdown altitude heading reference system and a working method of the micro-strapdown altitude heading reference system. The system comprises a data acquisition module, a data processing resolving module and a peripheral communication interface module, wherein the data acquisition module integrates a three-axis gyroscope, a three-axis accelerometer, a three-axis magnetic resistance sensor and an SPI (Serial Peripheral Interface) into an integrated micro-electronic mechanical system sensor; the data processing resolving module adopts a 32-bit ARM (Advanced RISC Machine) microcontroller; and the peripheral communication interface module consists of a serial port level switching chip, an RS-232 interface, a CAN (Controller Area Network) transceiver and a CAN interface. The working method of the system comprises the working steps as follows: the system is electrified and initialized; the system is self-tested; a magnetic field is self-calibrated; initial alignment is conducted; measured attitudes are combined: resolving the information of attitude headings according to initial three-dimensional altitude and altitude resolving algorithm of the strapdown altitude heading reference system, and resolving the three-dimensional magnetic altitude angle according to the compensated magnetic field information and acceleration information, conducting the information merging algorithm and finally obtaining the stable altitude heading reference information; and the altitude heading reference information is sent to application equipment.
Owner:NANJING UNIV OF SCI & TECH

Method and apparatus for obtaining and processing ballistocardiograph data

A method and apparatus are provided for obtaining and processing ballistocardiograph data to determine a physiological condition of a subject. Ballistocardiograph data indicative of heart motion of the subject measured along a plurality of spatial axes by a sensor device which may comprise a three-axis accelerometer. The ballistocardiograph data is processed to determine processed data indicative of heart motion of the subject. Indications of physiological condition are determined based at least in part on the processed data. Processing may comprise aggregation of multidimensional data, determining magnitude of heart motion and derivative thereof, determining a thrust summation, determining an index value, outputting a report based on an index value, etc. Processing may be informed by operator input, such as a time window of interest or indications of interest.
Owner:HEART FORCE MEDICAL

Single person positioning navigator based on multi-sensor fusion and positioning and navigating method

The invention discloses a single person positioning navigator based on multi-sensor fusion and a positioning and navigating method. The single person positioning navigator comprises a global satellite positioning system, a barometer, a three-axis gyroscope, a three-axis accelerometer and three-axis geomagnetic sensors. Attitude angle information obtained through the gyroscope, position information obtained through the accelerometer, human body course information provided by the geomagnetic sensors, height information provided by the barometer, stride frequency information worked out by the accelerometer, and position and speed information provided by the global satellite positioning system are input into a kalman filter together, multi-information fusion is carried out through a kalman filter algorithm, and thus positioning and navigating parameters are output. Even when the global satellite positioning system cannot stably receive information due to shielding, electromagnetic interference and other factors, the single person positioning navigator based on multi-sensor fusion and the positioning and navigating method can achieve effective positioning and navigating and are suitable for various environments such as inside rooms or inside tunnels. By means of the single person positioning navigator based on multi-sensor fusion and the positioning and navigating method, positioning errors accumulated along with time can be reduced, and accurate individual 3D positioning can be achieved.
Owner:CHINA ELECTRONICS TECH GRP NO 26 RES INST
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