Fall detection method and system
First Claim
1. A fall detection system, whose orientation with respect to its host body is fixed when it is being used, comprising:
- at least one sensor subsystem to detect the orientation change of said host body with respect to the local gravity direction;
said sensor subsystem comprises;
a floating object and detects fall by sensing the displacement of said floating object from its equilibrium position, where its gravity is well balanced by interaction force provided by other component(s) within said sensor subsystem before fall;
an elongated hollow tube with its longer axis purposely orientated along the local gravity direction when said host body stands straight on a flat surface normal to local gravity direction;
a floating structure containing hard magnet inside said hollow tube, which has predetermined smaller dimensions than said hollow tube and is capable of moving smoothly inside said hollow tube;
at least one sensing device, which can detect the position of said floating structure containing hard magnet within said hollow tube;
at least one permanent magnet, whose magnetization is opposite to the magnetization of the hard magnet within said floating structure and provide magnetic levitation to said floating structure containing hard magnet.
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Abstract
Fall detection method and systems with its unique designed sensors are disclosed. The capacitive sensing based systems use the abrupt changes of the capacitance value to detect whether a real fall event happens, while the reed sensor/or reed switch based systems work in power saving passive mode to detect the real fall event by analyzing the binary “on/off” signal available from the reed sensor/or reed switch. Both rely on the orientation change of the host body respects to local gravity direction during the falling process. The system can present either as a standalone system or a built-in component with supporting software installed on other devices.
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Citations
18 Claims
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1. A fall detection system, whose orientation with respect to its host body is fixed when it is being used, comprising:
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at least one sensor subsystem to detect the orientation change of said host body with respect to the local gravity direction; said sensor subsystem comprises; a floating object and detects fall by sensing the displacement of said floating object from its equilibrium position, where its gravity is well balanced by interaction force provided by other component(s) within said sensor subsystem before fall; an elongated hollow tube with its longer axis purposely orientated along the local gravity direction when said host body stands straight on a flat surface normal to local gravity direction; a floating structure containing hard magnet inside said hollow tube, which has predetermined smaller dimensions than said hollow tube and is capable of moving smoothly inside said hollow tube; at least one sensing device, which can detect the position of said floating structure containing hard magnet within said hollow tube; at least one permanent magnet, whose magnetization is opposite to the magnetization of the hard magnet within said floating structure and provide magnetic levitation to said floating structure containing hard magnet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification