초록 ▼

System for adaptive control and release of ski bindings comprising a smart-phone based application performing calculation of forces applied to the ski-binding system by analyzing acceleration vectors received from accelerometers embedded in the bindings, then instantaneously releasing both bindings

System for adaptive control and release of ski bindings comprising a smart-phone based application performing calculation of forces applied to the ski-binding system by analyzing acceleration vectors received from accelerometers embedded in the bindings, then instantaneously releasing both bindings if one or more of the predefined safety thresholds was exceeded.

대표청구항 ▼

1. A system to adaptively control the release of a ski bindings comprising: a MEMS accelerometers attached to the skier body and embedded into the ski bindings providing measurements of the skier and equipment acceleration vectors;a smart-phone based safety analysis system designed to estimate force

1. A system to adaptively control the release of a ski bindings comprising: a MEMS accelerometers attached to the skier body and embedded into the ski bindings providing measurements of the skier and equipment acceleration vectors;a smart-phone based safety analysis system designed to estimate forces applied to the ski binding and the skier knees and to provide control signal to the MEMS actuators embedded in the ski bindings;a MEMS actuator embedded in the ski bindings and intended for transferring control signals generated by the smart-phone based safety analysis system into bindings release motion; anda radio interface for transferring measurements and control signals between the sensor, a smart-phone based safety analyzer and bindings actuators, and wherein such safety analysis comprises of: at the specified intervals, retrieving an instantaneous acceleration vectors of each of the xyz coordinates from the accelerometers embedded in the ski bindings;applying an IIR filtering to the instantaneous acceleration vectors then performing piece-wise estimation of the acceleration, velocity and rotational moments;based on such piece wise estimation, and the equipment parameters contained within the second information, calculate forces applied to the ski-binding system for each of the xyz coordinates;based on acceleration vectors received from the accelerometers and the skier and ski equipment parameters contained in the first and the second information;based on the skier parameters contained within the first information, and the forces applied to the ski bindings, calculate forces and moments applied to the skier knees; and wherein, the instantaneous forces applied to the ski bindings and the skier knees are compared of with the safety thresholds obtained during the calibration, and if any of such force exceeds the safety thresholds for the time longer then the predefined during the calibration, proved an instantaneously release both bindings by sending control signal to the actuators. 2. The method of claim 1, wherein the MEMS accelerometers and the MEMS actuators embedded into the ski bindings communicates with the smart-phone based safety analyzer using Personal Area Network radio interface. 3. The method of claim 1, wherein the MEMS accelerometer embedded in the ski bindings provides measurements of acceleration vectors in xyz coordinate system. 4. The method of claim 1, wherein the MEMS actuator embedded in the ski bindings is capable of producing displacement with the force required for releasing of the ski bindings. 5. The method of claim 1, wherein the instantaneous acceleration vectors received from the actuators are first filtered using an IIR filter to remove the measurement variance. 6. The method of claim 1, wherein such analysis is performed in time or frequency domains. 7. The method of claim 1, wherein the safety criteria are verified by application of the one or more thresholds to each of acceleration, velocity, rotation and forces, in xyz coordination system for a predefined time duration, before the results of such verification is used to determine bindings release condition. 8. The method of claim 7, wherein one of such thresholds is the difference between the amplitude of the skier center mass and one of the ski or one of the knees, and the other is the difference between one ski and the other ski or one ankle and the other ankle. 9. The method of claim 8, wherein such thresholds are applied independently to each of the xyz coordinates of acceleration, velocity, rotation, or force safety component criteria. 10. The method of claim 8, wherein such thresholds are applied jointly to the xyz coordinates of acceleration, velocity, rotation, or force safety component criteria. 11. The method of claim 8, wherein such thresholds are applied jointly to acceleration, velocity, rotation and force to derive safety component criteria. 12. The method of claim 7, wherein in the absence of velocity, the only the measurement of shock force applied to the ski bindings or a rotational moment applied to the skier ankle is used as a condition for binding release. 13. The method of claim 7, wherein the safety timer is triggered when one of the safety thresholds is exceeded. 14. A method to calibrate adaptive ski binding system comprising of: associating the ski binding safety analyzer with the ski-binding system;retrieving the equipment parameters from the content of the first information;retrieving the user parameters from the content of the second information;instructing the user to perform calibration run; and wherein during such calibration run, the ski binding safety analyzer records the acceleration, velocity and rotational vectors, then calculates the forces applied to the ski bindings; and wherein after the results of such calculation is scaled by the measurement of the ski slope decline and by the user parameters retrieved form the second information, are stored as the ski binding safety criteria. 15. The method of claim 14, wherein the equipment parameters contained within the first information among the others includes such information as: total length, effective length, turning radius, longitudal and torsional stiffness. 16. The method of claim 14, wherein the user parameters contained within the first information among the others includes such information as: the user weight, height, ankle to knee length, knee to hip length, the distance from the hip to the user center of mass, and the snow condition. 17. A non-transitory computer accessible memory medium for storing program instruction pertaining to the ski bindings safety system, wherein the program instructions execute all of the following: retrieve magnitudes and amplitudes of an acceleration vectors from the multi-axes accelerometer using short-range wireless link;perform analysis of such acceleration vector in order to estimate forces applied to the ski-binding system, and use such results to obtain ski binding safety criteria;scaling of the results of forces applied to ski bindings by the user physical parameters and use such results to obtain skier knee safety criteria;compare such ski bindings safety criteria and the skier knee safety criteria with the respective safety thresholds; and wherein if any of the forces exceeds any of the safety criteria, generates control signal for the actuators embedded in the ski bindings instructing bindings release.