System and method for data retrieval in AC power tools via...

Details System and method for data retrieval in AC power tools via... System and method for data retrieval in AC power tools via...

2008-03-18

2008-03-18

Bahta, Kidest (Department: 2125)

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Having operator control interface

C700S017000, C700S108000, C700S180000, C173S001000, C173S004000, C702S183000

Reexamination Certificate

active

07346406

ABSTRACT:
An apparatus and method for obtaining data stored in an electronic module within a power tool over a power line cord of the tool, and without any disassembly of the tool being required. An interface subsystem applies a high frequency, low power AC input signal to the power cord of the tool. A controller within the tool recognizes this signal as an indication that the tool is to be placed in a communications mode. The controller modulates a power switching device used for turning on and off the motor of the tool in such a fashion that current pulses are transmitted over the power line cord back to the interface subsystem. The current pulses correspond to tool usage/performance/identification information stored in the electronic module of the tool. This information is interpreted by a current reader circuit of the interface subsystem as binary information which is then transmitted to an external computing device for analysis and/or recording.

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