Inertial mass measuring system deriving physical characteristics - uses vibrating oscillator working with higher and/or variable damping e.g. in liq.

摘要

The signal flow of the oscillator (1) is influenced by a frequency setting member (2) whose frequency of the value (16) to be measured affects the piezo-electric element (3) belonging to the frequency setting member. A variable amplifier (4) equalises the effect of the alternation from amplifying regulator (S) to maintain the vibration of the The oscillator. Conclusions can be drawn about The value (16) to be measured fron the frequency course of the oscillator signal (17) w.r.t. time. A return setter (6) can be provided to reduce the for resetting. USE - Continuous measuring of physical qualities, e.g. material concn., viscosity, layer thickness and density.