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    • 16. 发明公开
    • Disk drive device
    • 磁盘驱动器设备
    • EP1152424A2
    • 2001-11-07
    • EP01109778.9
    • 2001-04-20
    • Pioneer Corporation
    • Nagaki, KoichiMatsuo, KazunoriYamauchi, KeiichiKaneko, MichihiroWatanabe, Tomo
    • G11B31/00G11B19/04
    • G11B19/08G11B21/12G11B31/00
    • A disk drive device in which emergency unloading at the start of the engine is prevented, a head may have a prolonged life and improved reliability as an HDD is achieved. A disk drive device is driven or the movement of a magnetic head is allowed after an engine start in a vehicle is detected by an engine start detecting part, so that emergency unloading can be prevented at the start of the engine. In order to detect the engine start, voltage values on four power supply lines for a vehicle power supply device are monitored or the outputs of various sensors such as a tachometer, a vibration detection sensor, an engine sound detection sensor, a vehicle speed pulse, a gyro sensor and a parking brake are monitored. In another embodiment, the number of emergency unloading occurrence at the start of the engine is reduced, which allows the head to have a prolonged life, so that the disk drive device has improved reliability as an HDD. The voltage values on two power supply lines, first and second power supply lines for a vehicle power supply device are monitored. The magnetic head is allowed to move when the voltage values on the first and second power supply lines attain a prescribed value after a prescribed time period after the voltage value on the first power supply line attains prescribed value.
    • 在发动机起动时防止紧急卸载的磁盘驱动装置,磁头可以具有延长的寿命并且在实现HDD时提高了可靠性。 在发动机启动检测部分检测到车辆中的发动机启动之后,磁盘驱动装置被驱动或允许磁头移动,从而在发动机启动时可以防止紧急卸载。 为了检测发动机启动,监视车辆电源装置的四条电源线上的电压值或者诸如转速计,振动检测传感器,发动机声音检测传感器,车辆速度脉冲等各种传感器的输出。 监测陀螺仪传感器和驻车制动器。 在另一实施例中,减少了发动机起动时的紧急卸载发生的次数,这使得磁头具有延长的寿命,使得磁盘驱动器装置作为HDD具有提高的可靠性。 监视两条电源线,车辆电源装置的第一和第二电源线上的电压值。 在第一电源线上的电压值达到规定值之后的预定时间段之后,当第一和第二电源线上的电压值达到规定值时,允许磁头移动。