摘要:
In a method for detecting free fall, a first acceleration parallel to a first axis, a second acceleration parallel to a second axis perpendicular to the first axis, and a third acceleration parallel to a third axis perpendicular to the first axis and to the second axis are measured. A sum of a first absolute value of the first acceleration, a second absolute value of the second acceleration, and a third absolute value of the third acceleration is calculated, and the free fall is detected as a function of the sum.
摘要:
For a disk drive involving a disk; a head; and control circuitry having a servo control system operable to actuate the head, the control circuitry may be configured to determine a magnitude of acceleration readings, the acceleration readings involving at least three degrees of freedom, wherein when a magnitude of the acceleration readings is less than a first threshold, the control circuitry confirms a free fall, wherein when the magnitude is between the first and second threshold, the control circuitry confirms a tilt drop. During the tilt drop and the free fall, the control circuitry is further configured to actuate the head to park and monitor the shock impact.
摘要:
An information handling system includes a free fall sensing system having an amplifier and sampling circuit, a sampling data analyzer, a sampling clock duration controller, and a sampling clock generator. The amplifier and sampling circuit is configured to sample data signals from the free fall sensor based on an initial sampling signal and based on a variable sampling signal. The sampling data analyzer is configured to compare a magnitude of sampled data point to a predetermined magnitude, to output an alert signal when the magnitude of the sampled data point is below the predetermined magnitude. The sampling clock duration controller is configured to vary a duration and a frequency of a sampling signal control in response to the alert signal. The sampling clock generator is configured to send a variable sampling signal to the amplifier and sampling circuit in response to the variation of the duration and the frequency of the sampling signal control.
摘要:
The hand-held electronic device includes a central processing unit, a memory unit, a state-detecting unit, a state-determining unit, a main power supply unit, a standby power supply unit, and a power supply switching unit. After determining the presence of a fall state, the state-determining unit will output a fall instruction and which causes the central processing unit to enter a low current mode; meanwhile, the power supply switching unit monitors power output and continues to supply low-potential power. In case of a fall of the hand-held electronic device, the device and method protect operation data and reduce the otherwise power-consuming current. The less power-consuming current is conducive to the reduction of capacitance required for a backup battery. The low current mode is effective in reducing the time taken to recover the operation mode of the electronic device.
摘要:
A system and method for detecting a falling state of an electronic device include setting a time interval to collect position information of the electronic device and one or more alarm means, activating a global position system to locate a position of the electronic device, and acquiring position information of the electronic device at each time interval. The system and method further include calculating an acceleration of the electronic device, and activating one or more of the alarm means if the calculated acceleration is larger or equal to the acceleration of gravity.
摘要:
A data recording apparatus for recording data on a recording medium includes an acceleration detector configured to detect an acceleration which the apparatus is undergoing; a use mode detector configured to detect which one of fixed and non-fixed modes the apparatus is used in; a fall state determination unit configured to determine a fall state of the apparatus by switching fall detection algorithms for detecting a fall of the apparatus on the basis of an acceleration detected by the acceleration detector and the history of acceleration changes in accordance with the detection result by the use mode detector; and a preventive operation controller configured to cause an operation for preventing damage to the recording medium to be performed in accordance with the determination result of the fall state of the apparatus by the fall state determination unit.
摘要:
A data storage device having fall protection includes a rotatable media platter operable to receive and store data, a read/write head operable to communicate with the media platter by writing the data to the media platter and by reading the data from the media platter, an arm supporting the read/write head, a servo motor coupled the arm and operable to move the arm to and from the media platter, a drive controller operable to control the media platter, the read/write head and the servo motor, and a general purpose input/output (GPIO). In an embodiment, the GPIO is coupled with a fall sensor that is external to the data storage device so that when the fall sensor sends a floating interrupt trigger, signaling that the fall sensor is falling, the GPIO receives the interrupt trigger and the drive controller performs an emergency routine to cache data in flight to or from the data storage device and park the read/write head away from the media platter.
摘要:
An information processing apparatus includes a hard disk drive, an acceleration detection portion, and a controller. The hard disk drive has a protective function for moving a head from a recording area of a disk to an evacuation position. The acceleration detection portion is configured to detect, as a detection target acceleration, an acceleration in one of a vertical direction and an almost-vertical direction with respect to a gravity direction. The controller is configured to detect a movement based on the acceleration detected as the detection target acceleration and determine whether to activate the protective function of the hard disk drive based on the detected movement.
摘要:
An MEMS element (A1) includes a substrate (1), and a first electrode (2) formed on the substrate (1). The MEMS element (A1) further includes a second electrode (3) including a movable portion (31) spaced from the first electrode (2) and facing the first electrode. The movable portion (31) is formed with a plurality of through-holes (31a). Each of the through-holes (31a) may have a rectangular cross section.
摘要:
A device for protecting an electronic apparatus includes: a motion-detection device, for supplying at least one alert signal in response to conditions of motion of the protection device; a counter; a first logic circuit, for incrementing the counter in the presence of a first value of the alert signal, in a first operating condition; and a second logic circuit, for generating a protection signal on the basis of a count value of the counter. In addition, the first logic circuit is configured for decrementing the counter in the presence of a second value of the alert signal, in the first operating condition.