摘要:
An acoustic analysis device using a reduced scale model comprises a model of a reduced scale of 1/n, a loudspeaker and a microphone provided in the model, a sound signal forming circuit for forming a signal to be radiated by AD-converting an analog signal to be measured at a predetermined sampling frequency, storing the converted signal in a first RAM, reading out the stored signal at a first sampling clock and DA-converting the read out signal, a collected sound reproducing circuit for reproducing collected sound by AD-converting an output signal from the sound collecting device at a second sampling clock, storing the converted signal in a second RAM and reading out the stored signal at a third sampling clock, a sampling clock control circuit for setting the first sampling clock frequency at a value which is n times as high as the predetermined sampling frequency and setting the second sampling clock frequency at a value which is n times as high as the third sampling clock frequency, and an acoustic analysis circuit for acoustically analizing the output of the collected sound reproducing circuit. A frequency conversion device used for the acoustic analysis device comprises the above described sound signal forming circuit, collected sound reproducing circuit and sampling clock control circuit.
摘要:
The present invention is to provide a terminal insertion apparatus to insert a terminal into a terminal receiving chamber without hitting an inner surface of the terminal receiving chamber. A terminal insertion apparatus includes a housing holder unit, an insertion unit, and a control device. The housing holder unit holds a connector housing and is movable in a horizontal direction and a vertical direction. The insertion unit inserts a terminal attached with an electrical wire into a terminal receiving chamber of the connector housing. The control device controls a move unit support portion to reciprocate a housing holder by a move distance after an end portion of the terminal is inserted into the terminal receiving chamber so that the terminal can be inserted without hitting an inner surface of the terminal receiving chamber.
摘要:
Disclosed is a method for producing a porous carbon material comprising: heating a cured phenolic resin complex lump, including 150 to 450 parts by weight of sodium hydroxide and/or potassium hydroxide per 100 parts by weight of phenolic resin, at a temperature of 420 to 850° C. in a non-oxidizing atmosphere to obtain carbonized material; and washing and removing sodium hydroxide and potassium hydroxide included in the carbonized material. According to the present invention, there can be provided a porous carbon material, including large volumes of subnano-pores having a diameter of in a range of 0.45 to 1.0 nm with a sharp distribution, which is particularly useful as a gaseous adsorbent.
摘要:
A driving circuit for an active-matrix liquid-crystal display short-circuits at least two of the signal lines in the matrix at times of transitions of signal-line potentials in the matrix. Charge stored in the parasitic capacitances of the signal lines is thereby recycled from one signal line to another, reducing the current consumption of the driving circuit. When alternating-current driving is employed, current consumption can also be reduced by reducing the frequency with which signal lines are driven from one side of a center potential to the other side.
摘要:
A component mounting method including carrying in a circuit board to a component mounting position and carrying out the circuit board after component-mounting operation. The component mounting operation includes sucking up the component from the component feed section and moving the component to the mounting position, and mounting the component on a specified site of the circuit board. Also, a remaining-component discarding operation is performed to discard a component which remains at the suction nozzle during a specified time period following the component-mounting operation while the component mounting operation is stopped.
摘要:
In a method of stripping an insulated electric wire, circumferential cuts are formed in an insulating coating of the electric wire by use of circumferential cutters and then the circumferential cutters are moved in a longitudinal direction of the electric wire to separate cut pieces of the insulating coating from itself. After longitudinal cuts have been formed in the insulating coating by use of longitudinal cutters the insulating coating is removed by an air blow and an upper waste coating is sucked by a vacuum. Longitudinally cut edges of the insulating coating are abutted against shoulders which continue by intersection with inclined outer faces of cutting edges of the longitudinal cutters. A lower waste coating falls by a self weight between a pair of the longitudinal cutters. An ultrasonic horn may be employed to press the insulating coating toward the longitudinal cutters while making ultrasonic vibrations.
摘要:
An apparatus for stripping a section 54 of insulation covering from an insulation-covered wire at a predetermined location along an insulation-covered wire 50. The apparatus includes a circumferential cutting portion 10 for circumferentially cutting the predetermined insulation-covering section 54 at both ends thereof, a slitting portion 20 for slitting the predetermined insulation-covering section 54 in the axial direction, and a stripping portion 36 for stripping the predetermined insulation-covering section 54 from the core 52 of the wire 50. The slitting portion 20 includes a twin-blade cutter device 23 located in parallel with a longitudinal direction of the insulation-covered wire, and an ultrasonic vibration horn portion 27 located above the twin-blade cutter device 23. An insulation-covered wire 50 is placed between the ultrasonic vibration horn portion 27 and the twin-blade cutter device 23, and is vibrated at the frequency of an ultrasonic wave generated by the ultrasonic vibration horn portion 27. A distance “d” between two blades of the twin-blade cutter device 23 is longer than the width of the core 52 of the insulation-covered wire 50.
摘要:
An array of light-emitting elements is switched on and off to produce a graded-intensity image on a photosensitive medium. Each light-emitting element is controlled by M-bit data representing the intensity of one image pixel, where M is a fixed integer greater than one. M strobe signals are generated for non-overlapping time intervals of different lengths, to strobe the M data bits for each light-emitting element. When strobed, each data bit switches its corresponding light-emitting element on or off. Image intensity depends on the total amount of time for which each light-emitting element is switched on.
摘要:
A method is for driving a gas discharge type light emission apparatus having an electrode block line(s) constituted by electrode blocks. Scanning of adjacent cathodes, one being in one of two adjacent electrode blocks and the other being in the other electrode block, is effected such that subsequent to the scanning of one adjacent cathode, at least one cathode other than the other adjacent cathode is scanned prior to the scanning of the other adjacent cathode. By the method, crosstalk between adjacent electrode blocks is prevented without the provision of a partitioning member between the adjacent electrode blocks. A gas discharge type light emission apparatus includes an anode(s) on a front substrate and cathodes on a rear substrate. The anodes and cathodes face one another via a discharge gas medium to constitute discharge cells. The anodes are made of a light-blocking material and including windows at positions corresponding to the cathodes. The windows are also provided at positions corresponding to boundaries between adjacent anodes. By providing windows, discharge light emission having a clear shape and a high resolution can be obtained.
摘要:
A GaN crystal multi-layer substrate having surfaces with various crystal orientations formed on a sapphire base substrate, such as a substrate whose principal surface is a plane which is the a-plane, a plane which is the m-plane, or a plane having a low threading dislocation density and high crystal quality of a GaN crystal, and a production process therefor.The gallium nitride crystal multi-layer substrate comprises a sapphire base substrate and a gallium nitride crystal layer which is formed on the substrate by crystal growth, wherein the gallium nitride crystal layer is formed by lateral crystal growth from sidewalls which are c-planes of a plurality of grooves formed in the principal surface of the sapphire base substrate in such a manner that the surface thereof is parallel to the principal surface of the base substrate and constituted of a nonpolar a-plane or m-plane or a semipolar plane, and the dark-spot density of the gallium nitride crystal is less than 2×108/cm2, preferably not more than 1.85×108/cm2, particularly preferably not more than 1.4×108/cm2.
摘要翻译:具有形成在蓝宝石基底基板上的具有各种晶体取向的表面的GaN晶体多层基板,例如其主表面为a面的<11-20平面的基板,1-100平面, 是具有低穿透位错密度和GaN晶体的高结晶质量的m面或<11-22>面及其制造方法。 氮化镓晶体多层基板包括蓝宝石基底基板和通过晶体生长在基板上形成的氮化镓晶体层,其中氮化镓晶体层是通过侧壁晶体生长而形成的,所述侧壁是侧壁的c面 多个槽形成在蓝宝石基底基板的主表面上,使得其表面平行于基底基板的主表面,并由非极性a面或m面或半极性<11-22 >面,氮化镓晶体的暗点密度小于2×10 8 / cm 2,优选为1.85×10 8 / cm 2以下,特别优选为1.4×10 8 / cm 2以下。