Abstract: An analog-digital conversion circuit apparatus connectable to a microcomputer for measuring electric voltage and current of a vibrator of an ultrasonic wave oscillator is disclosed. An analog high-frequency wave voltage value signal and an analog high-frequency wave current value signal acquired from a vibration system are alternately input to a conversion-transmission section. A digital high-frequency wave voltage value signal and a digital high-frequency wave current value signal, which have been converted in the conversion-transmission section, are transmitted to the microcomputer for various uses connected with the electric voltage and current of the vibrator of the ultrasonic wave oscillator.

Abstract: A method for oscillating ultrasonic waves and a microcomputer's built-in ultrasonic wave oscillator circuitry being capable of tracking and regulating ultrasonic wave vibrations automatically to be oscillated stably at a resonant frequency of a vibrator. An amplified excitation signal, having a necessary oscillating frequency regulated and amplified in accordance with an input adjusting voltage value signal, is output from an operating unit section. A high-frequency wave current value signal, flowing through a vibrator, after the amplified excitation signal is introduced, is issued from a vibration system to a conversion-transmission section. The adjusting voltage value signal and the high-frequency wave current value signal are converted and then transmitted to the operating unit section, and a microcomputer, respectively.

Abstract: Apparatus for automatically measuring changing values of absorbance comprise a circular, absorption cell conveying system on which are disposed in order a multitude of absorption cells with samples injected therein, an optical measurement system disposed so that a measuring zone is positioned therewithin, said measuring zone is disposed in a predetermined position of said absorption cell conveying system, a measurement conversion system for encoding a measured value signal output from said optical measurement system with respect to each said absorption cell conducted successively into said measuring zone, a reference conversion system for encoding a reference value signal output from said optical measurement system, a synchronizing command system for generating a synchronizing signal upon sensing of the arrival of each said absorption cell at said measuring zone, and an arithmetic recording system including a microcomputer for inputting in parallel the output signals respectively from said measurement convers

Abstract: Apparatus for automatically measuring changes in amount of gas comprises a pressure sensor being attached to a closed vessel having a main chamber in which is contained a liquid enzyme or the like and adapted to convert a change in pressure within said vessel into an electric signal and output a measured pressure value signal; a photoelectric sensor adapted to convert an optical change of the liquid enzyme or the like within said closed vessel into an electric signal and output an optical measured value signal; an electrode adapted to come into contact with the liquid enzyme or the like within the vessel to convert a change in conductivity into an electric signal and output a measured conductivity signal; and an arithmetic circuit adapted to input respectively said measured pressure value signal, the measured pressure value signal and said optical measured value signal, and the measured pressure value signal and said measured conductivity signal simultaneously, effect calculations simultaneously in parallel a

Abstract: An oscillation system, having a vibrator, a resonant bridge and a low resistance, oscillates at desirable frequencies by receiving an excitation signal amplified to a predetermined value by an amplifier. A detection feedback signal containing the resonant frequency of the vibrator is input to a phase shift circuit. The phase shift circuit adjusts the phase of the detection feedback signal and the excitation signal to satisfy the oscillation condition. The output signal from the phase shift circuit is input to a PLL comprised of a phase comparator, a low pass filter, an amplifier and a voltage controlled oscillator. The frequency of the output signal from the PLL follows the resonant frequency of the vibrator and is locked. Its output signal is applied to the amplifier which feeds the oscillation system. An analog multiplier circuit is fed with signals proportional to the current and voltage from the resonant bridge circuit, and outputs the product of these signals.

Abstract: Rotary shaking culture measuring method and apparatus characterizes in that culture tubes are disposed radially and at equal intervals in the circumferential direction, and an inclined turntable is disposed at a predetermined angle of inclination with respect to a horizontal reference plane, a central shaft of the inclined turntable serves as a driving shaft whereby a turning motion in a continuous or intermittently indexing form is imparted to the turntable. In addition, the culture tubes revolve along an inclined circular orbit described by such turning motion, and the substance being cultured within the tubes is shaked and cultured by a reciprocative motion of inertial resultant force of centrifugal force and gravity. Furthermore, in a certain position of the turntable the growth of the substance being cultured within all the culture tubes is measured with the lapse of time by a signal obtained at every fixed cycle.