ELECTRONIC DRYWALL FASTENER LOCATER

摘要

An electronic drywall fastener/stud locator that includes a plurality of metal detectors connected together, each having a shunt resistance that varies based on the size of surrounding metal objects and the proximity of these objects. A sensing circuit is coupled to the sensor plates to measure the resonant frequency of the sensor plates. A controller is coupled to the sensing circuit to analyze the resonant frequency and parallel reactance measured by the sensing circuit. One or a plurality of indicators are coupled to the controller and are selectively activated to identify the location of a relative high inductance, which can be indicative of a wooden or metallic stud behind a surface.

主权项

1. A handheld, portable metal fastener detector comprising:
an outer casing having a top surface, a bordering perimeter surface, a gripping end and a sensing end wherein said top surface and bordering perimeter surface defined an enclosed space therein; a sensing PCB surface attached to said bordering perimeter surface defining an enclosing bottom surface; a proximity sensing circuit inside said enclosed space of said outer casing located on said sensing end; a controller coupled to said proximity sensing circuit; a display circuit inside said enclosed space of said outer casing located on said sensing end wherein, said display circuit is in communication with said proximity sensing circuit; a power source coupled to said controller and connected to said display circuit; an indicator display that displays said display circuit signals on said top surface of said outer casing wherein said proximity sensing circuit detects the nearby proximity of metallic objects using one or more coils through the measurement of the inductance and resistance of said one or more coils which is then converted to a level of proximity with a digital converter.