Particle count correction

Details Particle count correction Particle count correction

1975-08-11

1977-08-16

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

235 92PL, 235 92CC, 235 92R, G06M 1100

Patent

active

040428087

ABSTRACT:
A method and apparatus for correcting the output count of an electronic particle counting system in which additional correction pulses are added to the pulses generated by the electronic counting system as a result of detecting particles flowing through an orifice. The correction pulses are added in accordance with a curve which is generated by statistical computation determined by the size of the orifice and the character of the particles being detected therein and their quantity per unit volume. The improved apparatus comprises the addition of a second counter chain to the system which includes digital counters having outputs at various frequencies which are dividends of the frequency of the input pulses. The various-frequency outputs are combined through logic circuitry to generate individual correction pulses at frequencies such that when the pulses are added to the detected pulses, the total of the pulses corresponds to the actual number of particles flowing through the orifice.

REFERENCES:
patent: 3209130 (1965-09-01), Schmidt
patent: 3648030 (1972-03-01), Sheperd et al.
patent: 3737633 (1973-06-01), Collineau
patent: 3864551 (1975-02-01), Oefinger

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