The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 2019
Filed:
Jan. 12, 2018
Hitachi Metals, Ltd., Tokyo, JP;
Yukio Ikeda, Tokyo, JP;
HITACHI METALS, LTD., Tokyo, JP;
Abstract
A composite detection sensor includes a sensor cable including not less than three conductive electrode wires and a resilient insulation covering collectively the electrode wires and holding the electrode wires that are circumferentially spaced from each other, and a capacitance measurement unit for measuring capacitance between each two electrode wires and between each electrode wire and the ground. The capacitance measurement unit may include plural inter-wire capacitance measuring portions for measuring capacitance between the electrode wires, a wire-ground capacitance measuring portion for measuring capacitance between the electrode wires and the ground, and a switching means switchable between a first connection state and a second connection state, the first connection state being a state in which the electrode wires are connected to the inter-wire capacitance measuring portions, and the second connection state being a state in which the electrode wires are connected to the wire-ground capacitance measuring portion.