# US 2009/0260442 A1 · Drum Inspecting Apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2009/0260442 A1 - Document ID: US20090260442A1 - Status: Published application - Kind: A1 - Application number: 11/885,853 - Filed: 2007-07-19 - Published: 2009-10-22 - Earliest claimed: 2007-07-19 - Inventors: Toru Hara - Web page: https://patentgrep.com/patent/US20090260442A1 ## CPC - G01N 29/07: by measuring propagation velocity or propagation time of acoustic waves - G01B 17/02: for measuring thickness - G01N 2291/02854: Length, thickness - G01N 2291/0422: Shear waves, transverse waves, horizontally polarised waves - G01N 2291/2695: Bottles, containers - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS ## Abstract Inspecting a loss in section such as corrosion, rust and abrasion due to physical factor generated in an inside face of a drum securely and rapidly with a simple structure and specifying a generation position thereof. A drum inspecting apparatus for inspecting a loss in section generated in an inside face of a drum 1 from an outer face side, comprising an inspection ultrasonic wave device for inspection by detecting a position having a reduced thickness generated in the inside face of the drum 1 and estimating a range thereof with lateral ultrasonic wave, wherein the inspection ultrasonic wave device has a plurality of ultrasonic probes 2a for generating ultrasonic wave for the inspection of a side plate of the drum 1, attached to a top plate circumferential outer edge portion 11a or a bottom plate circumferential outer edge portion 12a of the drum 1. ## Claims ### Claim 1 A drum inspecting apparatus for inspecting a loss in section generated in an inside face of a drum from an outer face side, comprising an inspection ultrasonic wave device for inspection by detecting a position having a reduced thickness generated in the inside face of the drum and estimating a range thereof with lateral ultrasonic wave, wherein the inspection ultrasonic wave device has a plurality of ultrasonic probes for generating ultrasonic wave for the inspection of a side plate of the drum, attached to a top plate circumferential outer edge portion or a bottom plate circumferential outer edge portion of the drum. ### Claim 2 A drum inspecting apparatus for inspecting a loss in section generated in an inside face of a drum from an outer face side, comprising an inspection ultrasonic wave device for inspection by detecting a position having a reduced thickness generated in the inside face of the drum and estimating a range thereof with lateral ultrasonic wave, wherein the inspection ultrasonic wave device has a plurality of ultrasonic probes for generating ultrasonic wave for the inspection of a top plate or a bottom plate of the drum, attached to a top plate circumferential outer edge portion or a bottom plate circumferential outer edge portion of the drum. ### Claim 3 A drum inspecting apparatus for inspecting a loss in section generated in the inside face of a drum accommodating low level nuclear waste from an outer face side, comprising an inspection ultrasonic wave device for inspection by detecting a position having a reduced thickness generated in the inside face of the drum and estimating a range thereof with lateral ultrasonic wave, wherein the inspection ultrasonic wave device has a plurality of ultrasonic probes for generating ultrasonic wave for the inspection of the side plate of the drum attached to the top plate circumferential outer edge portion or bottom plate circumferential outer edge portion of the drum, and a plurality of ultrasonic probes for generating ultrasonic wave for the inspection of a top plate or a bottom plate of the drum attached to the top plate circumferential outer edge portion or bottom plate circumferential outer edge portion of the drum. ### Claim 4 (depends on 1) The drum inspecting apparatus according to claim 1, wherein a detachable supporting frame is attached to the top plate circumferential outer edge portion or the bottom plate circumferential outer edge portion and the supporting frame is provided with a plurality of ultrasonic probes for generating ultrasonic wave for the inspection of the side plate. ### Claim 5 (depends on 2) The drum inspecting apparatus according to claim 2, wherein a detachable supporting frame is attached to the top plate circumferential outer edge portion or the bottom plate circumferential outer edge portion and the supporting frame is provided with a plurality of ultrasonic probes for generating ultrasonic wave for the inspection of the top plate or the bottom plate. ### Claim 6 (depends on 1) The drum inspecting apparatus according to claim 1, wherein a detachable supporting frame is attached to the top plate circumferential outer edge portion or the bottom plate circumferential outer edge portion and the supporting frame is provided with a plurality of ultrasonic probes for generating ultrasonic wave for the inspection of the side plate and a plurality of ultrasonic probes for generating ultrasonic waves for the inspection of the top plate or the bottom plate. ### Claim 7 (depends on 1) The drum inspecting apparatus according to claim 1, wherein the ultrasonic probe is accommodated in an inner case an end of which is open, and the inner case is disposed movably within an outer case an end of which is open, the outer case being attached to the supporting frame and provided with a sticking magnet which is to be stuck to the drum, and an urging means for urging the ultrasonic probe in a direction to the drum being equipped between the outer case and the inner case. ### Claim 8 (depends on 1) The drum inspecting apparatus according to claim 1, wherein both faces of iron plate of the drum are galvanized and the galvanized surface is coated with resin film. ### Claim 9 (depends on 1) The drum inspecting apparatus according to claim 1, wherein the inspection is carried out by propagating the lateral ultrasonic wave from a top end portion to a bottom end portion of the side plate of the drum and from the bottom end portion to the top end portion. ### Claim 10 (depends on 1) The drum inspecting apparatus according to claim 1, wherein the inspection is carried out by propagating the lateral ultrasonic wave from the circumferential outer edge portion of the top plate or the bottom plate of the drum toward a central portion.