CIRCUIT APPARATUS FOR PROCESSING SIGNAL OF INDUCTIVE MEASURING SENSOR

PURPOSE: To prevent the error or temperature variation of a sensor from having effect on the output signal by providing means for connecting the coil of an inductivity measuring sensor with a comparator through a coupling capacitor and compensating for the charging thereof. CONSTITUTION: A signal in...

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Bibliographische Detailangaben
Hauptverfasser:	HERUMUUTO KUNISU, BUORUFUGANKU SHIYUMITSUTO
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS TARIFF METERING APPARATUS TESTING
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Beschreibung
Zusammenfassung:	PURPOSE: To prevent the error or temperature variation of a sensor from having effect on the output signal by providing means for connecting the coil of an inductivity measuring sensor with a comparator through a coupling capacitor and compensating for the charging thereof. CONSTITUTION: A signal induced in the coil 10 of an inductivity measuring sensor is applied through a coupling capacitor 11 with a peak value detector 14. A peak value memory capacitor 18 is charged with the positive half wave of a measuring sensor through a diode 17. Charges taken away tram the coupling capacitor 11 are compensated by a current flowing into a charge compensation resistor 12. Voltage of the peak value memory capacitor 18 is used for varying the threshold voltage of a differential amplifier 16. When the output signal from the coil 10 exceeds a variable threshold voltage, an output signal appears at the output terminal 28 of the differential amplifier 16.