Ronald L Yates

US Patent:

6854053, Feb 8, 2005

Filed:

May 2, 2001

Appl. No.:

09/848011

Inventors:

Gert H. Burkhardt - Pasadena CA, US
Craig Stephen Trommler - Romoland CA, US
Ronald John Yates - Long Beach CA, US
Albert Hai Zhou - La Puente CA, US

Assignee:

Signet Scientific Company - ElMonte CA

International Classification:

G06F013/10
G06F013/20
G06F012/00

US Classification:

713 2, 709208, 709239, 370457, 370465, 370475, 34082552

Abstract:

A method of identifying a plurality of slave processors using a master processor is provided which includes assigning a unique identification code to each of the plurality of slave processors, and transmitting an attention command from the master processor to the plurality of slave processors. The master processor then transmits a request for the slaves' unique identification code to the plurality of slave processors. The master processor then determines whether one of the plurality of slave processors unique identification code matches the classification characters. If there are no matches, a last added classification character is incremented by 1. If only one matches, the master processor identifies the one of the plurality of slave processors, and removes a last added classification character. Otherwise, if more than one matches, the master processor adds a new classification character, and sets a last added classification character to a minimum identification code character value.

US Patent:

57083630, Jan 13, 1998

Filed:

Oct 16, 1995

Appl. No.:

8/543504

Inventors:

Ronald J. Yates - Long Beach CA
Martin M. Munzer - Alhambra CA
Frederic D. Hook - Fontana CA

Assignee:

Signet Scientific Company - El Monte CA

International Classification:

G01N 2702

US Classification:

324442

Abstract:

A liquid conductivity measurement system is disclosed that accurately measures a liquid's conductivity over a range spanning at least several orders of magnitude using just a single sensor, but minimizing the adverse effects of capacitive and other non-linear factors on the conductivity measurement. The system includes a sensor having two spaced-apart electrodes immersed in the liquid and a drive signal source that applies to the sensor an ac electrical signal having a selected frequency and predetermined magnitude. A voltage detector monitors a sensor voltage signal across the sensor's two electrodes and produces a measurement of the liquid's conductivity. The drive signal source is configured to iteratively adjust the frequency of the ac electrical signal based on the sensor voltage signal, to optimize the liquid's conductivity measurement.