Electronic method and system for detection of conducting or...

Details Electronic method and system for detection of conducting or... Electronic method and system for detection of conducting or...

2008-07-22

2008-07-22

Williams, Hezron E. (Department: 2856)

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

Reexamination Certificate

active

07401513

ABSTRACT:
The method of detecting the presence of a conducting or dielectric environment with dielectric constant higher than that of air, of this invention, consists in counting the number of control signals (No), resulting from the relationship No=f(Qp, Qod, Ucc, Up, T), sent from the control system (US) as necessary to charge the capacitor (Cp) and then to discharge the previously-charged capacitor (Cp) to a threshold voltage (Up) preset by the control system (US), with the subsequent counting of the number of control signals (Nx), resulting from the relationship Nx=f(Qp, Qx, Ucc, Up, T), sent from said control system (US) as necessary to charge the capacitor (Cx), and then the previously-charged capacitor (Cp) is discharged to said threshold voltage (Up) preset by said control system (US) and the quantities of determined control signals (Nx) are compared with the reference state and the obtained difference in those signals indicates the presence of a conductive or dielectric environment in the immediate environment of the capacitor (Cx).

REFERENCES:
patent: 4001676 (1977-01-01), Hile et al.
patent: 4806847 (1989-02-01), Atherton et al.
patent: 0386965 (1990-03-01), None
patent: 2538542 (1982-12-01), None
Abstract of Polish Patent P-301505 Dec. 14, 1993 1 page.
Abstract of Polish Patent P-349033 Jan. 25, 2000.

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