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Apparatus and method for classifying glass articles using acoustic analysis

A kind of classification equipment and glass technology, which is applied in the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, character and pattern recognition, instruments, etc. It can solve the problems of lack of spectral characteristics of waste glass, low precision and efficiency of glass classification, etc.

Pending Publication Date: 2022-07-08
HONG KONG APPLIED SCI & TECH RES INST
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Problems solved by technology

However, the use of these optical sensing and machine vision methods for glass sorting results in low precision and efficiency due to the lack of spectral signatures of waste glass and the fact that it can include multiple colors on each piece of glass

Method used

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  • Apparatus and method for classifying glass articles using acoustic analysis
  • Apparatus and method for classifying glass articles using acoustic analysis
  • Apparatus and method for classifying glass articles using acoustic analysis

Examples

Experimental program
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Embodiment approach 1

[0033] refer to figure 2 , in step S210 , the processor 110 receives the sound data of the knocking sound corresponding to the glass object 200 from the sensor 150 . Next, in step S220, the processor 110 determines the type of the glass object by performing a tapping sound analysis on the sound data, wherein the type of the glass object includes organic glass and inorganic glass. Step S220 includes steps S221, S222, S223, S224, S225 and S228. In other words, "tapping sound analysis" is used to sort plexiglass items and inorganic glass items.

[0034] In another embodiment, the type of glass article further includes soda lime glass. That is, step S220 becomes step S220', in which the processor 110 determines the type of glass objects by performing a sound analysis on the sound data, wherein the types of glass objects include organic glass, inorganic glass and soda lime Glass. And compared with step S220, step S220' further includes steps S226 and S227. In other words, the...

Embodiment approach 2

[0063] The hardware and classification device of the second embodiment are the same as the classification device 100 of the first embodiment.

[0064] refer to Figure 9A , steps S910, S920 (S920') and S930 are the same as figure 2 Steps S210 , S220 and S230 are similar, and detailed descriptions are omitted here.

[0065] In step S940, the processor 110 determines further types of glass objects by performing sound velocity analysis on the echo data, wherein the further types of glass objects include crystal glass, borosilicate glass and soda lime glass.

[0066] Specifically, refer to Figure 9B , in step S941 the processor identifies the intensity information and time information of each data element of the echo data. Next, in step S942, the processor 110 identifies two pitch data elements corresponding to two adjacent intensity pitches of the echo data ED according to the intensity information, and then pairs the identified two pitches according to the time information ...

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Abstract

A method for classifying glass articles via acoustic analysis by a classification device is presented. The method includes: receiving, by a processor, sound data of a tap sound generated by applying a tap operation to the glass article; through a processor, the type of the glass article is determined by conducting knocking sound analysis on the sound data, and the type of the glass article comprises inorganic glass and organic glass; receiving, by the processor, echo data of echoes induced by applying an ultrasonic echo operation to the glass article if the type of the glass article is determined as inorganic glass; and determining, by a processor, a further type of the glass article by performing an echo attenuation analysis on the echo data, where the further type of the glass article includes crystal glass, borosilicate glass, and soda-lime glass.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority to US Provisional Patent Application No. 17 / 177,399, filed April 21, 2021, and US Non-Provisional Patent Application No. 17 / 688,845, filed March 7, 2022. The entire disclosure of the above application is incorporated herein by reference. technical field [0003] The present invention generally relates to classification methods and classification apparatuses. In particular, it relates to methods, apparatus and systems for sorting glass items via acoustic analysis. Background technique [0004] In theory, glass can be 100% recyclable due to the properties of the glass transition process. In practice, however, glass recycling is ineffective when dealing with batches of glass that are mixed with each other of different types. For example, the European Union recognizes this difficulty and in 2012 adopted the Regulation for End-of-WasteCriteria for Glass Cullet, in which separation and puri...

Claims

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Application Information

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IPC IPC(8): G06K9/62G01N29/04
CPCG01N29/04G06F18/24
Inventor 俞智楠陈振忠
Owner HONG KONG APPLIED SCI & TECH RES INST
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