摘要:
In a phase-modulated fiber-optic gyroscope having as essential components a fiber-optic cable having a sensor coil portion and a portion provided with a phase modulation device, a light-emitting device that issues coherent light, a beam splitter by which the light issuing from the light-emitting device either directly or via an optical fiber is split into two beams which are launched at opposite ends of the fiber-optic cable, a light-receiving device into which the light beams that have been transmitted through the fiber-optic cable and that emerge from opposite ends thereof are launched after they are re-combined by the beam splitter, and a synchronous detector circuit that receives the output of the light-receiving device and that detects a phase-modulated frequency component, the improvement wherein the gyroscope further includes a DC component detector that receives the output of the light-receiving device and that detects the DC component of the output, a reflected light quantity setting unit that presets the level of the reflected light H in the DC component which was reflected by the edge faces of lenses, optical fiber and other parts of the optical system and which did not pass through the sensor coil, a reflected light quantity subtracting unit that subtracts the present level of reflected light H from the output D of the DC component detector, and a division performing unit that divides the output of the synchronous detector by the output R of the reflected light quantity subtracting unit and that outputs the result of the division.
摘要:
A robot traveling duct for clean room in which a vertical laminar flow of air is produced from a ceiling filter toward a floor thereof, and in which the robot traveling duct is arranged within the clean room and below the ceiling filter and surrounds a guide rail of the robot, the robot traveling duct including a longitudinal opening for connection between the guide rail and the robot. The robot traveling duct includes a first enclosure for enclosing the guide rail to extend along the guide rail, the first enclosure having an air intake system for introducing air, issuing from the ceiling filter, into the first enclosure. The robot traveling duct further includes a second enclosure mounted to the first enclosure to be located below the first enclosure, the second enclosure including a second enclosure filter for filtering air therein and allowing the filtered air to go downwards into the clean room, the second enclosure extending along the guide rail and being equal in width to the first enclosure. The robot traveling duct is further provided with an air forcing mechanism for forcing air from the first enclosure into the second enclosure, whereby a laminar air flow is substantially produced just below the second enclosure means by actuating the air forcing mechanism.
摘要:
There is disclosed a dusttight storage cabinet apparatus used for storing works such as wafer cassettes for containing semiconductor wafers. The storage cabinet apparatus includes: a housing having an entrance, formed in its front wall, for allowing works to come in and go out of the housing therethrough; an air supply duct for supplying the inside of the housing with clean air; a vertical rotation shaft rotatably disposed in the housing for turning about its longitudinal axis; a drive motor for turning the rotation shaft; and a rack assembly of a substantially cylindrical structure. The rack assembly is coaxially secured to the rotation shaft and has a plurality of compartments for storing the works therewithin. The compartments open radially outward and are partitioned off from one another so as to prevent cross contamination by dust among the compartments.
摘要:
A distribution type fuel injection apparatus has a fuel injection pump having a solenoid valve for controlling pressure of a high-pressure chamber of the apparatus. The solenoid valve is actuated or deactuated at the optimum time for fuel injection end or beginning by a control signal produced by a circuit for computing the optimum timing in accordance with the condition of engine operation. Thus, precise control of injection timing or injection amount injected can be attained by electronic control without a complex mechanical structure.
摘要:
A blade system of the present invention includes: a blade angle calculating part configured to calculate sum of a forwardly tilting angle of a vehicle body with respect to a reference surface and a blade lifting angle of a lift frame with respect to a reference position; a difference angle calculating part configured to calculate a difference angle by subtracting a predetermined angle from the sum of the forwardly tilting angle and the blade lifting angle; an opening ratio setting part configured to set an opening ratio of a proportional control valve based on the difference angle; and a lift controlling part configured to control the proportional control valve in accordance with the opening ratio set by the opening ratio setting part until a predetermined period of time is elapsed after onset of dozing by a blade.
摘要:
A thin film transistor matrix device including an insulating substrate with a plurality of lines arranged on the substrate, where the lines include first lines and second lines. The device also includes a first connection line extending in a direction transverse to the plurality of lines, where the first connection line and the first lines are configured and arranged to be electrically connected to each other, as well as a second connection line extending in a direction transverse to the plurality of lines, where the second connection line and the second lines are also configured and arranged to be electrically connected to each other. The first and second connection lines are both formed on the same side of an image display region, when considered in plan view. Finally, the plurality of lines are associated, respectively, with drain bus lines and/or gate bus lines.
摘要:
A liquid crystal display device comprising a liquid crystal layer including liquid crystal molecules provided between a first substrate and a second substrate; pixels forming a display area; electrodes for applying a voltage across the liquid crystal layer within each of the pixels; a plurality of domain regulating structures for dividing orientations of the liquid crystal molecules and forming multiple domains within each of the pixels, when a predetermined voltage is applied across the liquid crystal layer within each of the pixels. The device also includes a structure which is formed in an outer area located next to the display area, but that does not overlap the display area, and is substantially the same as at least one of the plurality of domain regulating structures.
摘要:
A network system having duplicate lines of a primary system and a backup system between a transmitter apparatus and a receiver apparatus is provided. Each of the transmitter apparatus and the receiver apparatus includes an arithmetic operator for conducting a BIP-8 arithmetic operation and a CRC arithmetic operation on an input signal and thereby detecting a bit error. The transmitter apparatus transmits data to both lines. The receiver apparatus includes a switcher. When a bit error is detected in received data of the primary system. the switcher switches control of the primary system and the backup system. Hitless protection switching of a VC path is executed.
摘要:
In a method of manufacturing a wiring board, a basic circuit pattern is formed on an insulating plate, and a metal layer is formed on the basic circuit pattern by cold spraying to thereby form a built-up circuit pattern on the basic circuit pattern.
摘要:
A television receiver including: a reception control unit which judges whether reception of the cable television broadcast signal has succeeded, by setting the channel data composed of the combination of the frequency table stored in the first storage unit and the modulation method stored in the second storage unit, the modulation method corresponding to the tuned channel. The reception control unit sequentially changes the channel data to be set in a previously determined order to make the reception unit receive the cable television broadcast signal corresponding to the tuned channel when the reception control unit judges that the reception of the cable television broadcast signal has not succeeded.