The invention provides a pressure-typed digital article
position sensor, which is characterized in that a rod-shaped body is provided with a plurality of piezoelectric
ceramic sheets which are vertically arranged into a line with equal distances and connected with a micro-
voltage detection integration circuit and a power supply. During the measurement, each piezoelectric
ceramic sheet below the article position generates a weak
electric signal which changes into a state of high level '1' with determined amplitude after
filtration, amplification, shaping and comparing, and is obviously distinguished from the state of low level '0' output by a plurality of piezoelectric
ceramic sheets above the article position; the number of all high levels '1' which is counted by the collecting circuit is the current digital article position value. During the measurement, the pressure-typed digital article
position sensor has no relation with the physical performances of the object to be measured such as
dielectric constant, magnetic permeability and resistivity, etc., has the advantages of good detection reliability, high precision and simple structure, is especially suitable for the measurement of
powder-shaped or small grain-shaped
solid article position in
coal bins and grain depots, etc.