Calculation method, judgment method, selecting method and selecting device

A technology of calculation method and judgment method, which is applied in the direction of material analysis and sorting using radiation, and can solve the problem that the type of material cannot be judged with high precision.

Active Publication Date: 2017-07-14
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a problem that, when there is a possibility that three or more inspection objects may be contained in a pl

Method used

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  • Calculation method, judgment method, selecting method and selecting device
  • Calculation method, judgment method, selecting method and selecting device
  • Calculation method, judgment method, selecting method and selecting device

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Experimental program
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Embodiment approach 1

[0035]

[0036] figure 1 It is a flowchart showing the method of determining the type of material constituting the object to be inspected according to the first embodiment. Such as figure 1 As shown, the method for judging the type of material constituting the inspection object according to Embodiment 1 (hereinafter simply referred to as "judgment method") includes step S100 (hereinafter also referred to as "detection process"). In this step S100, The object to be inspected is irradiated with X-rays, and the transmission intensity of low-energy X-rays transmitted through the object to be inspected and the transmission intensity of high-energy X-rays transmitted through the object to be inspected are detected.

[0037] The judging method includes step S200 (hereinafter also referred to as "calculation process"). In this step S200, with regard to the object to be inspected, the weighted ratio of the transmission intensity of low-energy X-rays and the transmission intensity of...

Embodiment approach 2

[0066] In Embodiment 1, a structure is described in which one reference object is prepared for each type of material classified focusing on contained elements to create a database. In this case, it is only necessary to prepare one reference object for each type, and thus the database can be created efficiently. However, the primary straight line on a reference object classified into a certain type T may be slightly different from the primary straight line on a reference object classified into the same type T due to variations in object thickness and chemical composition. Therefore, when the variation is large, it can be said that a determination method that takes this variation into consideration is more preferable.

[0067] Therefore, in Embodiment 2, the structure which prepares several objects for each type of material and creates a database is demonstrated. The judging method according to the second embodiment differs from the judging method according to the first embodim...

Embodiment approach 3

[0077] In Embodiment 2, a configuration is described in which the relationship between the average value of a plurality of difference values ​​J corresponding to a plurality of objects prepared for each type and the weight coefficient k is stored as a database. In Embodiment 3, the structure which stores the upper limit curve and the lower limit curve based on the said average value as a database about each type is demonstrated.

[0078] The judging method according to the third embodiment is different from the judging method according to the first embodiment in the above-mentioned judging process. Parts in Embodiment 3 other than the determination step are the same as those in Embodiment 1, and therefore detailed description thereof will not be repeated.

[0079] First, the database according to Embodiment 3 will be described. As a preparatory stage for creating this database, a plurality of objects are prepared for each type of material in the same manner as in the second e...

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PUM

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Abstract

The invention provides a calculation method, a judgment method, a selecting method and a selecting device. The judgment method for judging kinds of materials which is used for forming a to-be-detected object comprises the following steps: emitting X-ray to the to-be-detected object, and detecting permeance strength of low-energy X-ray and permeance strength of high-energy X-ray; for the to-be-detected object, calculating a relationship between a difference value obtained by performing weighted difference on the permeance strength of low-energy X-ray and the permeance strength of high-energy X-ray and a weight coefficient used for the weighted difference; and based on a plurality relationships respectively corresponding to a plurality of reference objects of which kinds of the material are known and different with each other and a relationship corresponding to the to-be-detected object, judging the kind of material for forming the to-be-detected object.

Description

technical field [0001] The present disclosure relates to a calculation method, a determination method, a selection method, and a selection device, and in particular, to a calculation method for determining the type of material constituting an inspected object, a determination method using the calculation method, and a method for selecting an inspected object. Object selection method and selection device. Background technique [0002] Conventionally, inspection of foreign objects using X-ray transmission has been performed in various industries such as the food industry and the pharmaceutical industry. In this inspection, an object is irradiated with X-rays, and a foreign object is detected based on a difference in transmission intensity (magnitude of absorption) of X-rays transmitted through the object. The transmission intensity of X-rays depends on the material, thickness, and density of the object, the type and concentration of elements constituting the object, and the l...

Claims

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Application Information

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IPC IPC(8): G01N23/02B07C5/34
CPCB07C5/3416G01N23/02
Inventor 川上唯藤井宣行中慈朗平野则子
Owner MITSUBISHI ELECTRIC CORP
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