摘要:
A piezoelectric device is essentially composed of a piezoelectric transducer and a light transmitting protector. The protector is made of heat resisting glass, heat resisting acrylic, transparent ceramics or the like. By exposing the piezoelectric device to a laser beam and thereby causing it to penetrate through the protector to the piezoelectric transducer and to partly cut the surface of the piezoelectric transducer, or to change the intensity of polarization, mechanical coupling coefficient or dielectric constant of the piezoelectric transducer, its vibration frequency and resonance characteristic can be adjusted. If an ultraviolet-ray setting agent is used as adhesive, it can be hardened by exposing the piezoelectric device to ultraviolet rays to thereby cause it penetrate through the protector.
摘要:
A power supply device provided with a main power supply unit that supplies generated predetermined power to an electric load, a current detecting unit, a current indicating unit, an electric storage unit, an auxiliary power supply unit, and a control unit that determines an upper limit current value to be output to the current indicating unit on the basis of at least a condition of the electric load, and controls the upper limit current value such that power supplied from the auxiliary power supply unit to the electric load is converged in a predetermined convergence time when the power supply from the auxiliary power supply unit to the electric load is stopped or reduced.
摘要:
A process for treating a pulp-containing waste liquor which comprises adding a flocculating agent to the pulp-containing waste liquor and separating and removing the resulting flocculated matter, characterized in that about 1 to about 50 parts by weight, per 1000 parts by weight of the turbid components in said waste liquor, of a dicyandiamideformaldehyde resin is admixed with the waste liquor, and then aluminum sulfate is added to the mixture.
摘要:
An activation control apparatus includes a voltage fluctuation obtainer to obtain voltage fluctuation amplitude of an external power source at a given voltage, the voltage fluctuation caused when activating an apparatus using the external power source; a voltage fluctuation detector to detect the voltage fluctuation of the external power source at the given voltage; an activation controller to determine whether the voltage fluctuation amplitude obtained by the voltage fluctuation obtainer at the given voltage of the external power source, detected by the voltage fluctuation detector, is within a preset allowable voltage fluctuation range, and to control activation of the apparatus using the external power source based on a result of the voltage fluctuation determination made by the activation controller.
摘要:
A manufacturing method for a ceramic oscillator capable of controlling the oscillation frequency with a high accuracy is disclosed. In this method, a mother substrate is polarized, electrodes in discrete ceramic oscillator units are formed, the mother substrate is cut into discrete ceramic oscillator units, an outer package is applied to each of the ceramic oscillators, and thus a ceramic oscillator as a finished product is achieved. Herein, the polarization processing for the mother substrate is executed by finishing the application of a high DC voltage, when the antiresonant frequency fa of the mother substrate in a thickness vibration mode is measured while the voltage is applied to the mother substrate, and the antiresonant frequency fa which is being measured has reached a target value of the antiresonant frequency of the mother substrate during polarization corresponding to a target oscillation frequency of the ceramic oscillator as a finished product.
摘要:
A pressurized fluid supply hose which conducts pressurized fluid discharged from a pump to a fluidically operated device is disclosed. A spiral tube formed by two spirally wound band members is fixed by caulking in one end of a steel pipe. The outer shape of the one end of the steel pipe includes a taper portion formed to slope gradually between a thin portion and an outer diameter portion. By effecting a caulking process with a caulking tool having a pressing portion extending in parallel to an outer surface of the steel pipe, the outer taper portion of the steel pipe is contracted to formed an inner taper portion at an internal surface thereof, and one end of the spiral tube is fixed to the inner taper portion. Because the spiral tube is gradually deformed along the inner taper portion of the steel pipe, it can avoided that a large clearance is formed between the two band members of the spiral tube.
摘要:
An engine comprising an intake port which has a separating wall projecting downwardly from the upper wall of the intake port. The separating wall defines a helical portion, an inlet passage portion tangentially connected to the helical portion, and a bypass passage interconnecting the inlet passage portion and the helical portion. The side wall of the helical portion has a slightly inclined portion located near the outlet portion of the bypass passage and expanding towards the separating wall so as to define a narrow passage portion between the inclined portion and the separating wall. A rotary valve is arranged in the bypass passage and is actuated by a vacuum-operated diaphragm apparatus. The rotary valve is opened when the amount of air fed into the cylinder of the engine is increased beyond a predetermined value.
摘要:
A control device is configured to control an image forming apparatus to form an image on a recording medium. The control device includes circuitry configured to acquire a consumed direct current (DC) power value that is a DC power value consumed in the image forming apparatus, estimate a characteristic of the consumed DC power value in a period in which an image is formed on at least one recording medium, and determine a limit value of fixing power to be supplied to a fixing device of the image forming apparatus that fixes an image on a recording medium, to have cyclicity corresponding to the characteristic of the consumed DC power value.
摘要:
A power supply device provided with a main power supply unit that supplies generated predetermined power to an electric load, a current detecting unit, a current indicating unit, an electric storage unit, an auxiliary power supply unit, and a control unit that determines an upper limit current value to be output to the current indicating unit on the basis of at least a condition of the electric load, and controls the upper limit current value such that power supplied from the auxiliary power supply unit to the electric load is converged in a predetermined convergence time when the power supply from the auxiliary power supply unit to the electric load is stopped or reduced.
摘要:
A power supply device includes: a main power supply configured to feed power to a load with constant-voltage output using an external power supply; an auxiliary power supply configured to feed power to the load using an internal power storage unit; a constant-current/constant-voltage switching power supply configured to feed a part of current flowing through the load by which part the current exceeds an upper limit value of output current of the main power supply instructed by a current upper-limit instruction unit, with the constant-current output from the auxiliary power supply; and an output switching unit switching the constant-current/constant-voltage switching power supply from the constant-current output to the constant-voltage output when a power cut monitoring unit determines stop of power supply from the external power supply.