PORTABLE PHOTOELECTRIC DISPLACEMENT MEASURING INSTRUMENT

• Main Authors: YAMAZAKI IWAO, IMAI HIROMICHI
• Format: Patent
• Language: English
• Published: 22.04.1991
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

PURPOSE:To judge a measured value which is characteristic to displacement by sound by generating a continuous sound signal which varies continuously within an audio frequency range with the value of the current of a deflecting coil corresponding to the displacement measured value in a permissible range. CONSTITUTION:The displacement quantity of an object body is proportional to a current flowing through the deflecting coil 12 (13), so this current is detected to measure the displacement quantity. The current of the deflecting coil 12 (13) at this time is read by a detection resistor RS and inputted to a detecting amplifier circuit 83, which supplies part of its output signal to a display part 20 and the rest is supplied to a level converter 90. The converter 90 converts the supplied output signal into voltage by compressing or expanding. The output of the level converter 90 is inputted to a voltage-frequency(V/F) converter 91 and converted to the audio frequency range corresponding to the input signal. The output of the V/F converter 91 is inputted to a sound driving circuit 94 and inputted to a speaker 96. Consequently, the measured value which is characteristic to the displacement of the object can be judged by sound.