초록 ▼

A capacitance article density monitor which is adjusted to have a zero voltage output when no articles are positioned adjacent a sensor and wherein the output of the circuit may be utilized directly to control a variable speed drive for a machine to which articles are being directed depending upon t

A capacitance article density monitor which is adjusted to have a zero voltage output when no articles are positioned adjacent a sensor and wherein the output of the circuit may be utilized directly to control a variable speed drive for a machine to which articles are being directed depending upon the density of such articles in a conveying area in advance of the machine. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.

대표청구항 ▼

A capacitive article density monitor comprising an elongated sensor, a compensator in the form of a bank of capacitors including a plurality of individual capacitors each having a selector switch, a power supply, a pulsed control unit providing control pulses at different intervals, a first selector

A capacitive article density monitor comprising an elongated sensor, a compensator in the form of a bank of capacitors including a plurality of individual capacitors each having a selector switch, a power supply, a pulsed control unit providing control pulses at different intervals, a first selector gate unit controlled by selected ones of said control pulses to sequentially connect said power supply to said sensor and to said compensator, a second selector gate unit for selecting between the outputs of said sensor and the output of said compensator, and an integrator for receiving the selected outputs of said second selector gate unit for providing a voltage output in accordance with the article density sensed by said sensor.