Государственный Университет "Львовская Политехника"
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Measuring Instrument Details And Bridges, And Automatic Balancing Devices
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Abstract
SLR-parameter measuring device includes generator of sinusoidal resistance, Z/Ux transformer of measured impedance to proportional complex voltage in set of measuring operative amplifier, standard resistor, two switches and differential amplifier, integrator, former, switch, two phase-sensitive detectors, two low frequency filters, logometer and two input clips. Input of measuring operative amplifier is connected through standard resistor to common contact of the second switch and directly to first input fastening of measuring device, second fastening of that one is connected to common contact of first switch, inverting input of differential amplifier is connected to output of generator, non-inverting – to output of measuring operative amplifier.
Hair care appliance capable of measuring the moisture of the hair by measuring the resistance of the hair, and a circuit for converting the resistance value of the resistor into the measurement signal (Hair-care appliance with hair-moistness measurement by measuring the resistance of the hair, and circuit for converting the resistance value of a resistor into a measurement signal)