Nondestructive inspection device and crane equipped with nondestructive inspection device

• US 7,420,174 B2
• Filed: 01/06/2005
• Issued: 09/02/2008
• Est. Priority Date: 08/05/2004
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Heavy Industries, Ltd.
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Uchida, Koji, Masumoto, Masanori, Kurita, Koichi, Kusano, Toshiyuki
• Primary Examiner(s): Porta; David P.
• Assistant Examiner(s): VU, MINDY D
• Application Number:
  US11/029,353
• Publication Number:
  US 20060027751A1
• Time in Patent Office: 1,335 Days
• Field of Search: 250/358.1, 378/57
• US Class Current: 250/358.1
• CPC Class Codes: G01V 5/22 Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays

Abstract

An object is to provide a nondestructive inspection device of a low equipment cost, and a crane equipped with the nondestructive inspection device. The nondestructive inspection device is provided for a quay crane, on a transporting route of the container. The nondestructive inspection device irradiates radiation from radiation sources to a container which has entered into an inspection area, and detects radiation that has transmitted through the container using the same detector, and nondestructively inspects the entire inside of the container based on information of intensity of the radiation and information of detection position of the radiation. The nondestructive inspection device is provided with; a modulation device which assigns different modulations to each radiation emitted from each of the radiation sources, and an identification device that distinguishes the modulation assigned to the radiation incident on the detector based on the output of the detector, and identifies which one of the radiation sources this radiation has been emitted from.

Claims

1. A nondestructive inspection device that radiates penetrative radiation from a radiation source to an inspection object, detects penetrative radiation transmitted through said inspection object using a detector, and nondestructively inspects an inside of said inspection object based on information of intensity of said penetrative radiation and information of detection position of the penetrative radiation,

wherein a plurality of radiation sources that emit penetrative radiations are arranged so as to respectively radiate said penetrative radiations to said detector from different positions on opposite sides of an inspection area into which said inspection object enters, said plurality of radiation sources irradiate the detector from different directions so that irradiated areas overlap each other;

and, the nondestructive inspection device comprising;

a modulation device that assigns different modulations to each penetrative radiation emitted from each of said radiation sources, and

an identification device that distinguishes the modulations assigned to the penetrative radiations incident on said detector based on output of said detector, and identifies the radiation of each penetrative radiation source incident on the detector.

2. A nondestructive inspection device according to claim 1, wherein among said radiation sources, said penetrative radiation source which radiates said radiation to an end part of said inspection area is disposed in either a front facing position of said end part, or a position which is outside of said front facing position.

3. A crane having the nondestructive inspection device according to claim 1.

4. A crane according to claim 3, wherein said crane is a quay crane.

5. A nondestructive inspection device, comprising:

a plurality of radiation sources spaced apart from each other and arranged to radiate penetrative radiations to an inspection object,

a detector configured to detect the penetrative radiations transmitted through said inspection object in order to nondestructively inspect an inside of said inspection object, said detector having a size less than a distance between the radiation sources situated adjacent to each other and being disposed between the radiation sources situated adjacent to each other,

a modulation device configured to provide different modulations to the respective penetrative radiations emitted from the radiation sources, and

an identification device that distinguishes the modulations assigned to the penetrative radiations incident on said detector based on an output of said detector, said identification device identifying the radiation sources irradiating the detector,

said radiation sources being arranged so that said penetrative radiations radiate different areas of the detector and the irradiated areas overlap each other.

6. A nondestructive inspection device according to claim 5, wherein said detector has the size such that the radiations ejected from the penetrative radiation sources spaced apart from each other are entirely received by the detector at a same time through the inspection object.

7. A nondestructive inspection device according to claim 6, wherein each of said radiation sources irradiates penetrative radiations to a part of the inspection object.

8. A nondestructive inspection device according to claim 6, wherein said penetrative radiation sources are spaced apart from each other with a distance greater than the size of the detector so that the radiation ejected from each of the penetrative radiation sources only covers a part of the inspection object.

9. A crane comprising said nondestructive inspection device according to claim 5.