Fuji Electric Co., Ltd.

Fuji Electric Device Technology Co., Ltd.

Mitsubishi Chemical Corporation

Fuji Electric Holdings Co., Ltd.

Hitachi Transport System, Ltd.

Kiminori Sato

Hiroyuki Yoshimura

Takuya Ono

Tsuyoshi Yoshizawa

Yukihiro Takano

Akira Saito

Narumi Sato

Hiroyuki Chida

Takehito Mizuno

Eiichi Yonezawa

Yuhi Shinohara

Ryoki Sato

A management assistance system can include: an imaging device; a first monitoring device; a second monitoring device; an instruction terminal; and a server. The instructing terminal can be configured to determine whether or not the caution determination condition is satisfied based on first monitoring information transmitted from the first monitoring device and second monitoring information transmitted from the second monitoring device, and transmit a dashcam video cut instruction signal to the imaging device when determining that the caution determination condition is satisfied. The imaging device can extract information of a predetermined time width including a reception time of the dashcam video cut instruction signal from the continuous dashcam video information to create dashcam footage information, associates the dashcam footage information with date and time information and identification information, and transmits the dashcam footage information to the server.

Management assistance system

A servo pattern magnetization method is provided, having full-amplitude servo signals, to eliminate the need for intensity modification and waveform shaping during servo signal reading, and to improve the precision of head positioning and enable an increase in track recording density. A servo pattern magnetization method for a perpendicular recording discrete track medium, having a plurality of recording areas and a plurality of servo areas separating the plurality of recording areas, has a process of recording magnetization perpendicular to the substrate and in opposite directions in each of the magnetic recording layers of the plurality of servo blocks, by means of the leakage magnetic field from the soft magnetic layers separated from other servo blocks when a magnetic field is applied.

Perpendicular recording discrete track medium and servo pattern magnetization method for same

A process for manufacturing a zeolite membrane by hydrothermal synthesis on the surface of a porous tubular supportwith both ends open, by adding a reaction solution containing a silica source and an alumina source and the porous tubular supportinto a lengthwise reaction containerlonger than the porous tubular supportwhile placing the porous tubular supportvertically in the reaction containerand substantially apart from the inner surface of the reaction container, and immersing the porous tubular supportcompletely in the reaction solution so that the inside of the porous tubular supportis filled with the reaction solution; and heating the reaction solution under conditions of leaving the top and bottom ends of the porous tubular supportopen, and an apparatus using thereof and zeolite tubular separation membranes thus obtained.

Method and apparatus for manufacturing zeolite membrane, and zeolite tubular separation membrane provided by the method

To enable alignment of a magnetic pattern of a pair of master disks and a magnetic recording medium, each of the master disks has at least a pair of alignment marks disposed outside the region of the magnetic pattern. The master disks can be optically transparent or semi-transparent. The master disks can be aligned while the alignment marks are externally observed.

Master disk device for transferring magnetic patterns to both sides of a magnetic recording medium, and alignment device therefor and alignment method thereof

A magnetic data embedding system (or disk servo writer) includes a stack with a master disk () and a plurality of magnetic disks () mounted on a shaft of a spindle motor (), and a rotary positioner () which integrally holds one or more read-only heads (to) for reading the master disk and a plurality of groups of servo heads (to) and which simultaneously turns both of the kinds of heads. The groups of servo heads have access to the top and bottom sides of the magnetic disks. The servo heads are made carry out writing to the same (top or bottom) side of each of the disks in parallel, within assigned track ranges for the respective servo heads. In order to make the servo heads on the same side of the disks carry out writing correctly in their assigned track ranges in several of the disclosed embodiments, an address correction data memory () supplies information about track position errors between the read-only heads and their associated servo heads to a servo head address deriving unit (), which corrects track addresses of items of servo information read by the read-only heads and transmits the corrected track addresses to a servo pattern generator () to make the servo heads write the corrected address. This shortens the time needed for writing servo patterns to magnet disks with high density and high accuracy.

Magnetic data embedding system

A magnetic pattern of a master disc is transferred to both sides of a magnetic recording medium with no displacement. The origin of a magnetic recording medium can be determined by observing the inner or outer periphery of the magnetic recording medium. Back-side alignment marks are formed on the front side of the magnetic recording medium based on the origin thus determined. The back-side alignment marks can be observed with a microscope and front-side alignment marks for the magnetic recording medium can be provided on the back side of the magnetic recording medium. The alignment marks provided on the front/back sides of the magnetic recording medium are aligned with the corresponding alignment marks provided on the master disc, and a magnetic pattern formed on the soft magnetic material of the master disc is can be transferred to the magnetic recording medium.

Magnetic transfer apparatus and method for magnetic recording medium

A magnetic disk medium allows embedding ID information that prevents manipulation and yet holds its uniqueness. ID information for uniquely identifying a medium is recorded separately as a master ID information on a preformatted region and as individual medium ID information on a non-preformatted region in a pre-embossed type magnetic disk.

Magnetic disk medium, fixed magnetic disk drive unit, and method thereof

Rotary positioners integrally and pivotally stack a read magnetic head for reading a master disk and servo heads for writing to each surface of magnetic disks, the master disk and magnetic disks being stacked on a shaft of a spindle motor. Every surface of every magnetic disk is written by the servo heads in parallel while sharing a range of tracks. Simultaneously with the writing, checking magnetic heads stacked on a checking-dedicated rotary positioner read written data on the master disk and on each surface of the magnetic disks. A comparison logic circuit compares the read data from the magnetic disk surfaces with the data from the master disk. If an inconsistency is found, the contents of the master disk are overwritten on the corresponding magnetic disk surface through a correction servo pattern generator by the checking magnetic head.

Magnetic data embedding apparatus having checking function

A method for obtaining relative positional relationships between a read-only head for reading data from an original disk and servo heads on each surface of magnetic disks (copy disks), in a magnetic data writing apparatus (disk servo writer) that stacks copy disks and an original disk to rotate the disks unitarily. The apparatus includes a rotary positioner on the periphery of the copy disks and a read-only disk, stacking the read-only head and servo heads rotatably. The apparatus causes the servo heads simultaneously to write servo data to respective assigned track ranges. The method includes stacking calibration disks storing servo data in place of the copy disks in a coaxial relation with the read-only head, in advance of writing magnetic data to the copy disks. Using the calibration disks, relative positional relationships are obtained as between the address that the read-only head reads out from the original disk and the addresses that servo heads read out from calibration disks at the same time that the read-only head reads out the address thereof.

Method for obtaining head positions in magnetic data writing apparatus

A method of controlling magnetic recording in a magnetic recording medium and a control device for the same provides a symmetrical transferred signal waveform of equal magnitude with good reproducibility and performs magnetic transfer with high reliability. In performing initial magnetization prior to performing transfer magnetization, an AC magnetic field, the polarity of which changes in the perpendicular direction Y (or both in the perpendicular direction Y and parallel direction X), is applied to the recording surface of the magnetic recording layer of a magnetic recording medium, and the intensity of the AC magnetic field is gradually decreased with time, to demagnetize the entire magnetic recording layer.

Method of demagnetizing and transferring magnetization in a magnetic recording medium, and device thereof

A magnetic-disk evaluation apparatus includes a magnetic head positioned relative to a magnetic disk including temporary servo signals. Fluctuation of a magnetic head in a seek direction is measured using a measurement device. A measuring rotating arm moves in tandem with a rotating stage holding a rotary positioner. The measurement device is on the measuring rotating arm. The rotary positioner is controlled on the basis of temporary servo signals to position the magnetic head on a circle, concentric from a center of a spindle motor. Fluctuation of the magnetic head in the seek direction is measured to detect the displacement of the magnetic head and to determine whether the temporary servo signals are acceptable based upon the displacement and an outside standard.

Magnetic disk evaluation apparatus and method

A device for positioning control of a magnetic head in consideration of eccentricity amount generated due to chucking under the same structure or condition as a hard disk drive of the actual machine is provided. The device includes a thin suspension for supporting a magnetic head for testing, a thick rotary positioner for supporting the suspension, a voice coil disposed at the reverse direction end of the magnetic head for testing of ends of the rotary positioner, a rotary shaft for supporting the magnetic head for testing, the suspension and the rotary positioner, and a pair of magnets and b for sandwiching the voice coil are provided on a stage, thereby constructing the same mechanism as a hard disk drive of the actual machine.

Growing community of inventors

Nagano, Japan

Kiminori Sato