公开(公告)号：CA2757284A1

公开(公告)日：2010-10-07

申请号：CA2757284

申请日：2010-03-30

Applicant: KIONIX INC

Inventor： KIM DONG YOON ,  MILLER SCOTT

IPC: G01P15/18 ,  G06F3/041 ,  H04W88/02

Abstract: A directional tap detection algorithm and a single tri-ax?s accelerometer (10) are employed to extend the number of unique button less input commands available for a small mobile electronic device (12) such as a cell phone or a MP3 player. The algorithm analyzes acceleration data from the tri-axis accelerometer (10) to detect the direction and number of taps imparted to any of the six sides (14) of a housing (13) of the device (12), yielding 12 unique inputs. The algorithm employs a parameter referred to as the performance index (Pl) to identify tap induced movements. The Pl is determined by calculating the time derivative of each acceleration signal for each axis and then calculating the sum of the absolute values of the calculated acceleration derivatives. A tap is determined to have occurred if the sum exceeds a threshold value for a predetermined amount of time.

公开(公告)号：CA2681413A1

公开(公告)日：2008-10-09

申请号：CA2681413

申请日：2008-03-27

Applicant: KIONIX INC

Inventor： MILLER SCOTT A ,  KIM DONG YOON

IPC: G01P15/18

Abstract: A system (10) and method detect freefall associated with an object that i s spinning or tumbling as it falls. Two tri-axis accelerometers (14, 16) pro vide inputs to an algorithm (28) that detects the freefall of a spinning obj ect that would not otherwise be detected by a conventional freefall detectio n system, due to the centrifugal and centripetal forces being placed on the falling object as it spins. The system can be used to detect the freefall of portable devices with onboard memory or hard disk drives, allowing the devi ces to have time to park the read/write head and reduce the potential of los ing data that can be damaged by impact. This freefall detection system may b e applied to such portable devices as notebook computers, PDAs, MP3 players, digital cameras, mobile phones and even automobiles.

公开(公告)号：WO2008121739A8

公开(公告)日：2010-02-18

申请号：PCT/US2008058522

申请日：2008-03-27

Applicant: KIONIX INC ,  KIM DONG YOON ,  MILLER SCOTT A

Inventor： KIM DONG YOON ,  MILLER SCOTT A

IPC: G01P15/18

CPC classification number: G01P15/0891 ,  G11B19/043

Abstract: A system (10) and method detect freefall associated with an object that is spinning or tumbling as it falls. Two tri-axis accelerometers (14, 16) provide inputs to an algorithm (28) that detects the freefall of a spinning object that would not otherwise be detected by a conventional freefall detection system, due to the centrifugal and centripetal forces being placed on the falling object as it spins. The system can be used to detect the freefall of portable devices with onboard memory or hard disk drives, allowing the devices to have time to park the read/write head and reduce the potential of losing data that can be damaged by impact. This freefall detection system may be applied to such portable devices as notebook computers, PDAs, MP3 players, digital cameras, mobile phones and even automobiles.

Abstract translation: 一种系统（10）和方法，用于检测与下降时正在旋转或翻滚的对象相关联的自由落体。 两个三轴加速度计（14,16）为算法（28）提供输入，该算法（28）检测纺丝物体的自由落体，由于离心力和向心力被放置在 坠落的物体，因为它旋转。 该系统可用于检测具有板载内存或硬盘驱动器的便携式设备的自由落体，从而允许设备有时间停放读/写头，并减少丢失可能受到影响而损坏的数据的可能性。 这种自由落体检测系统可以应用于诸如笔记本电脑，PDA，MP3播放器，数码相机，移动电话甚至汽车的便携式设备。

公开(公告)号：EP2414798A4

公开(公告)日：2015-05-06

申请号：EP10759299

申请日：2010-03-30

Applicant: KIONIX INC

Inventor： KIM DONG YOON ,  MILLER SCOTT

IPC: G06F1/16 ,  G01L1/00

CPC classification number: G06F1/1694 ,  G06F1/1626 ,  G06F2200/1636

Abstract: A directional tap detection algorithm and a single tri-axis accelerometer are employed to extend the number of unique button less input commands available for a small mobile electronic device. The algorithm analyzes acceleration data from the tri-axis accelerometer to detect the direction and number of taps imparted to any of the six sides of a housing of the device, yielding 12 unique inputs. The algorithm employs a parameter referred to as the performance index (PI) to identify tap induced movements. The PI is determined by calculating the time derivative of each acceleration signal for each axis and then calculating the sum of the absolute values of the calculated acceleration derivatives. A tap is determined to have occurred if the sum exceeds a threshold value for a predetermined amount of time. If a second tap is detected within a predetermined time after the first tap, then a double tap is determined to have occurred.