摘要:
In a dust removing system, the level of influence of dust sticking to an objective lens of an optical head is detected from either an amount of light emitted from the optical head and reflected from an optical head or from an access time. Three stages of levels with regard to the degree of influence of the dust are set in accordance with such detection value, and a different message for the removal of dust is indicated on a display unit in response to the level of the influence. When the influence is low, a dust removing mechanism is automatically rendered operative to remove the dust. At the first level at which the influence of dust is low, the optical disk in the optical disk device is discharged and cleaning of the objective lens is performed, and an indication is provided on the display unit representing that cleaning is proceeding. When the second stage is detected, the optical disk in the optical disk device is discharged, and a message is indicated on the display unit representing that cleaning of the objective lens should be performed using a cleaning disk. When the third stage is detected, a message is indicated on the display unit representing that cleaning of the objective lens should be performed by manual operation.
摘要:
A spark plug includes an insulator having an axial hole extending in the direction of an axis, and a terminal electrode disposed at a rear end portion of the axial hole. An identifier bearing externally visible identification information is joined to the rear end surface of the terminal electrode. The identifier has a thickness of 0.03 mm or greater along the direction of the axis.
摘要:
The cavity of a plasma jet ignition plug is configured in a stepped shape; i.e., composed of a constricted portion and a diameter-increased portion (65). The inner diameter (B) of the constricted portion is made smaller than the inner diameter (A) of the diameter-increased portion. Further, as measured along the direction of the axis O, the length (Y) of the constricted portion is made equal to or greater than the length (X) of the diameter-increased portion. This configuration suppresses a pressure loss produced when the generated plasma expands within the cavity. As a result, the energy of the plasma at the time of jetting is increased, and the igniting performance for an air-fuel mixture can be improved.
摘要:
In transmitting data between a server device and a client device or between communication terminals, a data transfer rate is set in response to an available bandwidth, an application of the data, and the like not to cause waste of the network. A controlling portion detects a packet loss caused per transmission of data, and then chooses a compression mode whose data transfer rate is low when the packet loss is detected. In contrast, the controlling portion counts a time required from the data transmission (a reciprocation delay time) in such a situation that no packet loss is caused, and chooses a compression mode whose data transfer rate is high when the reciprocation delay time is sufficiently small. As the method of choosing the compression mode, for example, the method of switching a codec into another codec or changing a compression ratio being set in the codec may be employed.
摘要:
A glow plug includes a heater member; heater power lead wires which extend rearward along an axis and whose conductors electrically communicate with one and of a heater conductor for supply of power; a sensor, portion for detecting the combustion pressure of an internal combustion engine; a sensor connection line connected to the sensor portion and extending rearward along the axis; a housing; a sensor-portion-enclosing tube; and a grommet formed from an insulating rubber-like elastic material, having insertion holes through which the heater power lead wires and the sensor connection line are respectively inserted, the grommet liquid-tightly closing an end portion of the sensor-portion-enclosing tube and liquid-tightly holding the heater power lead wires and the sensor connection line.
摘要:
There is provided a gas sensor, which includes a sensor element extending axially of the gas sensor and having a gas sensing portion at a front end thereof and an electrode portion at a rear end thereof, a cylindrical metal shell retaining therein the sensor element with the gas sensing portion and the electrode portion protruding from front and rear ends of the metal shell, respectively, and having a flange portion and a rear end portion located on a rear side of the flange portion, a cylindrical protection cover having a front end fitted onto the rear end portion of the metal shell so as to cover the electrode portion and a weld joint through which the entire circumference of the front end of the protection cover is joined through the metal shell. The weld joint extends from an end face of the protection cover to the metal shell.
摘要:
In a protector (100) for protecting a detecting portion (11) of a sensor element (10) of a gas sensor (1), the opening area of individual inner introduction holes (130) and (140) formed in an inner protector (120) is 3.5 mm2 or less. In this manner, the amount and size of water droplets able to pass through the inner introduction holes (130) and (140) and to adhere to the sensor element (10) is restricted. In order to ensure good gas replaceability between the interior and the exterior of the inner protector (120) so as to attain quick gas response, the total opening area of the inner introduction holes (130) and (140) is 10 mm2 or more.
摘要:
A surface position detecting method, wherein, while an object having a region with a pattern structure is scanned relative to a surface position detecting system in a scan direction, different from a surface position detecting direction of the surface position detecting system, the surface position detecting system performs surface position detection sequentially at a plurality of detection points, which are disposed within the region and along the scan direction. The method includes steps of measuring beforehand errors to be produced with respect to the detection points due to a difference in pattern structure among the detection points disposed along the scan direction and correcting, when the surface position detection is sequentially performed by the surface position detecting system at the detection points along the scan direction while the object is scanned in the scan direction relative to the surface position detecting system, a result of the detection by the surface position detecting system at each detection point, on the basis of a measured error corresponding to that detection point, measured in the measuring step.
摘要:
An Nb.sub.3 Al multi-filamentary superconducting wire capable of realizing both stabilization of a superconducting state and increase in capacity is provided. The Nb.sub.3 Al multi-filamentary superconducting wire includes a core formed of copper or copper alloy and located at the center of the wire; a multi-filamentary superconductor layer located around the core and having filaments containing Nb and Al as constituent elements embedded in a matrix formed of copper or copper alloy; and a high resistance layer located around the multi-filamentary superconductor layer, and is characterized in that a sectional area of the core is at least 15% of the total sectional area of the core and the matrix and that the core and the matrix are formed of copper or copper alloy of at least 99.9% purity.
摘要:
A method of manufacturing an Nb.sub.3 Al superconducting wire includes a step of forming a wire by a jelly-roll process, a first thermal step of heating the obtained wire at a temperature of 500.degree. to 700.degree. C. for at least 10 hours for diffusing Al in Nb while suppressing formation of Nb.sub.3 Al, and a second thermal step of heating the wire, after the first thermal step, at a temperature of 800.degree. to 1050.degree. C. for about 0.01 to 10 hours, thereby forming Nb.sub.3 Al. In the jelly-roll process, a sheet of Nb and a sheet of Al are lap-wound on a copper core. The material obtained by such lap winding is inserted in a copper pipe, and then subjected to drawing. The drawn wire is cut to obtain a plurality of segments. The plurality of segments are bundled and charged in a copper pipe, and then subjected to drawing. The resulting drawn wire is subjected to the first and second thermal steps. In this manner a superconducting material having a high critical current density under a high magnetic field is obtained.