CRACK SENSOR AND CRACK MONITORING DEVICE

• US 20160202161A1
• Filed: 01/07/2016
• Published: 07/14/2016
• Est. Priority Date: 01/14/2015
• Status: Active Grant

• Current Assignee: Toshiba Tec Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Tec Corporation (Toshiba Corporation)
• Inventors: Komiya, Kenichi, Ishikawa, Daisuke
• Granted Patent: US 10,048,184 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01M 5/0033 by determining damage, crack or wear
• CPC Class Codes: G01N 19/08 Detecting presence of flaws or irregularities
• CPC Class Codes: G01N 2203/0062 Crack or flaws
• CPC Class Codes: G01N 2291/0258 Structural degradation, e.g. fatigue of composites, ageing of oils
• CPC Class Codes: G01N 2291/106 one or more transducer arrays
• CPC Class Codes: G01N 27/20 Investigating the presence of flaws
• CPC Class Codes: G01N 27/205 in insulating materials
• CPC Class Codes: G01N 27/24 Investigating the presence of flaws
• CPC Class Codes: G01N 29/2475 Embedded probes, i.e. probes incorporated in objects to be inspected
• CPC Class Codes: G01N 3/40 Investigating hardness or rebound hardness
• CPC Class Codes: G01N 33/383 Concrete or cement

Abstract

A crack sensor for detecting the extension of a crack comprises an insulator base material made from an insulating material, a common line formed on the insulator base material along a first direction and a plurality of gauge lead wires which is formed on the insulator base material and each of which has an end connected with the common line at an interval and another end extending in a second direction orthogonal to the first direction, wherein the extending end reaches a position to which the extending end retreats in a direction opposite to the first direction with respect to the end connected with the common line.

Claims

1. A crack sensor for detecting the extension of a crack, comprising:

an insulator base material made from an insulating material;

a common line formed on the insulator base material along a first direction; and

a plurality of gauge lead wires which is formed on the insulator base material and each of which has an end connected with the common line at an interval and another end extending in a second direction orthogonal to the first direction, wherein

the extending end reaches a position to which the extending end retreats in a direction opposite to the first direction with respect to the end connected with the common line.

2. The crack sensor according to claim 1, wherein

a plurality of gauge lead wires is separately arranged at the two sides of the second direction by taking the common line as a boundary.

3. The crack sensor according to claim 1, wherein

the crack sensor has a mark indicating the first direction.

4. The crack sensor according to claim 2, wherein

the crack sensor has a mark indicating the first direction.

5. The crack sensor according to claim 1, wherein

one or more inclined straight lines or curves are formed as a plurality of the gauge lead wires.

6. A crack monitoring device for monitoring an extension status of a crack according to information detected by the crack sensor of claim 1, comprising:

a transmission section configured to detect whether or not a gauge lead wire is cut off and transmit a detection result; and

a data receiving and processing section configured to receive the data sent from the transmission section and store the crack data detected by the crack sensor in a memory.