CN103926317A - Method for screening workpieces through ultrasonic wave - Google Patents
Method for screening workpieces through ultrasonic wave Download PDFInfo
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- CN103926317A CN103926317A CN201410172339.XA CN201410172339A CN103926317A CN 103926317 A CN103926317 A CN 103926317A CN 201410172339 A CN201410172339 A CN 201410172339A CN 103926317 A CN103926317 A CN 103926317A
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Abstract
The invention discloses a method for screening workpieces through ultrasonic wave. The method comprises the following steps: building a standard database of detected workpieces and setting a threshold of standard data in a control center; building data of detection angles required for screened workpieces, comparing the data with the built standard data of same angles in the standard database to screen the workpieces which do not meet the requirements. Similarly, an error correction database is also built, and then the workpieces corresponding to the data in the error correction database can be screened by the steps. By adopting the technical scheme, unqualified products can be tested and screened with high accuracy, thus improving efficiency and accuracy for managing quality, screening and recognizing objects in production and life; the method has the advantages of low repeatability and error rate and is wide in application range in the fields of environmental protection, transportation, classification and screening in production.
Description
Technical field
The present invention relates to a kind of method of ultrasound wave screening workpiece, relate in particular to a kind of method of utilizing the ultrasound wave screening workpiece of the screening that object outward appearance carries out.
Background technology
The method of existing object screening mainly contains by naked eyes detection, ray detection and ultrasound examination, naked eyes detection efficiency is very low, ray detection has safely larger impact to testing staff's health, than ray detection, ultrasound examination is safer, higher than naked eyes detection efficiency, therefore ultrasound examination is more and more extensive, the general sound wave of hyperacoustic wavelength ratio is short, there is good directivity, and can see through opaque material, this characteristic has been widely used in UT (Ultrasonic Testing), thickness measuring, range finding, remote control and ultrasonic imaging technique.Existing ultrasonic tesint is mainly used in range finding, flaw detection, distance test is to test based on simple flat surface, complicated three-dimensional test is difficult to satisfy the demands, test of flaw detection is also to test based on obvious slight crack of interior of articles etc., the physical change of material itself or chemical change are difficult to realize test, as: the external structure of product and deformation are tested and detected whether defectiveness of test product, to whether the product in the middle of producing is qualified, screen fast and effectively; Therefore, when reality is used, be very restricted, there is technological deficiency in a lot of fields in ultrasonic technique advantage performance at present, to fields such as production, communications and transportation, lives, has serious dangerous hidden danger to be difficult to Real-Time Monitoring and tracking.
Summary of the invention
Technical matters to be solved by this invention is for problems of the prior art, a kind of method of utilizing the ultrasound wave screening workpiece that object outward appearance screens is provided, by hyperacoustic echoed signal as feedback signal and carry out data processing, compare with normal data, detect underproof workpiece.
The invention provides a kind of method of ultrasound wave screening workpiece, the pick-up unit that this recognition methods relates to has and comprises, test probe, ultrasonic generator, control center, actuating unit; In described test probe, be provided with ultrasound wave sending and receiving apparatus, ultrasound wave sending and receiving apparatus all adopts ultrasonic transducer, described ultrasonic generator is popped one's head in by cable connecting test, to ultrasonic transducer, provide stable high-frequency signal, in described control center, be also provided with central processing unit, storer, PLC, control center is connected with test probe, control center is to ultrasound wave sending and receiving apparatus transmission detection signal, described actuating unit is by connecting control center, and described control center controls the run action of actuating unit by PLC.
A method for ultrasound wave screening workpiece, comprises the following steps:
A sets up the standard database of detected workpiece,
(a1) by test probe, the detected workpiece of theta alignment with required detection scans, control center sends detection signal to detected workpiece transmitting ultrasound wave to the ultrasound wave sending and receiving apparatus in test probe, ultrasound wave sending and receiving apparatus is transferred to the reflected signal collecting the central processing unit being attached thereto, central processing unit carries out data processing to the signal collecting, and the data of handling well are stored in storer and by control center and note with mark and form measured workpiece at the normal data of this specified angle;
(a2) measured workpiece is set up to Data duplication step (a1) with the angle of other required detection;
B carries out data foundation to the required detection angles of screened workpiece and the same angular standard data of setting up in these data and step a is compared;
(b1) threshold value of the normal data of storing in the setting steps a of control center as required;
(b2) test probe being aimed to screened workpiece with required detection angles scans, control center sends detection signal to screened workpiece transmitting ultrasound wave to the ultrasound wave sending and receiving apparatus in test probe, ultrasound wave sending and receiving apparatus is transferred to central processing unit by the reflected signal collecting, central processing unit carries out data processing to the signal collecting, and the normal data with angle in the data of handling well and step a is compared.
(b3) the angle repeating step b2 with other required test to screened workpiece;
C filters out undesirable workpiece;
Control center compares according to the normal data of each corresponding specified angle of setting up in the data of each required detection comparison of screened workpiece in step b and step a, in arbitrarily angled in step b, one group of data do not meet the threshold value of corresponding normal data in step a, screened workpiece is undesirable, and the storeroom setting put into undesirable workpiece grabbing by actuating unit; Topworks will be in b step each angle-data respectively with corresponding angular standard data comparison in a step, each organize corresponding data all the screened workpiece grabbing of identical (in the threshold range of setting) be positioned over another storeroom setting.
Further, while setting up the standard database of detected workpiece, according to required, can increase or reduce parts building database repeating steps (a) to measured workpiece.
In field of error correction, can first preserve workpiece needs the data of error correction as normal data, the data of testee and normal data are compared, thereby can detect rapidly the place that workpiece mistake occurs, for further checking, provide the most accurately and data the most timely.
Principle of work:
Surface to tested object is scanned, gather testee feedback signal, and carry out data processing and generate normal data, normal data is stored in to storer, screened object is detected, to gather reprocessed data and normal data comparison, thereby filter out non-compliant product.
Positive progressive effect of the present invention is: the present invention is by above-mentioned technical solution; can high-precision test and filter out underproof product; efficiency and the precision of the central qualitative control of productive life and object screening identification have been improved; have advantages of that repeatability and error rate are low, in fields such as environmental protection, communications and transportation, production category filters, have wide usable range.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the detected Workpiece standard data of foundation of the present invention;
Fig. 2 is the structure schematic diagram that in the embodiment of the present invention, mobile phone takes down the scarce screw of bonnet and the upper left corner, top;
Fig. 3 is the structural representation that in the embodiment of the present invention, mobile phone takes down scarce two screws of bonnet and top;
Embodiment
Lift a preferred embodiment below, and carry out by reference to the accompanying drawings the clearer the present invention that intactly illustrates.
As shown in Figure 1, set up the standard database of detected workpiece, the detected workpiece of theta alignment by test probe with required detection scans, control center sends detection signal to detected workpiece transmitting ultrasound wave to the ultrasound wave sending and receiving apparatus in test probe, ultrasound wave sending and receiving apparatus is transferred to the reflected signal collecting the central processing unit being attached thereto, central processing unit carries out data processing to the signal collecting, and the data of handling well are stored in storer and by control center and note with mark and form measured workpiece at the normal data of this specified angle, measured workpiece is set up to the above step of Data duplication with the angle of other required detection, set up detected standard database.
Embodiment mono-, phenomenon to the few dress screw (3) often occurring in mobile phone (1) assembling process in mobile phone manufacturing enterprise, when mobile phone (1) lacks screw, mobile phone (1) can use in loosening impact, even can be because the loosening internal component that makes damages due to mobile;
First on mobile phone (1) screening streamline, test probe is fixedly mounted, while making mobile phone (1) back side through probe, probe can just in time scan mobile phone (1), mobile phone (1) is removed to the mobile phone back side situation that the bonnet back side do not lack screw (3) and carry out ultrasonic scanning foundation and one group of normal data of storage, then in control center, set the threshold value of normal data.
As shown in Figure 2, when mobile phone (1) that screw socket (2) lacks a screw (3) is exposed in screened that remove bonnet and the upper left corner, top through test probe, ultrasound wave sending and receiving apparatus in test probe sends ultrasound wave to mobile phone 1, ultrasound wave sending and receiving apparatus is transferred to the ultrasonic echo collecting (reflected signal) central processing unit of control center, central processing unit compares the data of handling well with the normal data in storer, data do not meet the threshold range of storage normal data wherein, screened mobile phone (1) is undesirable, actuating unit is controlled by PLC, the mobile phone (1) of a upper left corner screw of undesirable disappearance (3) is captured and puts into the storeroom setting.
In like manner as shown in Figure 3, when screened, while removing mobile phone (1) that rear tops lacks two screws (3) by screening system, screened mobile phone (1) is judged to defective mobile phone, is performed device and captures and put into the storeroom setting.
Embodiment bis-, mobile phone error correction screening
First all combinations that mobile phone (1) lacked to screw (3) scan respectively Criterion database, six kinds of situations of a scarce screw (3) are set up respectively the situation of the scarce screw (3) of six kinds of diverse locations and are carried out ultrasonic scanning and store six groups of corresponding normal datas, then to lacking any two screws (3), any three screws (3), any four screws (3), any five screws (3), complete scarce screw (3) and the not situation of scarce screw (3) are set up corresponding normal data, Bing control center sets respectively the threshold value of each group normal data, in control center, set program and by PLC, control the operation of actuating unit simultaneously.
As shown in Figure 2, when the screened mobile phone that removes bonnet (1) passes through test probe, ultrasound wave sending and receiving apparatus in test probe sends ultrasound wave to mobile phone (1), ultrasound wave sending and receiving apparatus is transferred to the ultrasonic echo collecting (reflected signal) central processing unit of control center, central processing unit is compared by the data of handling well processor with normal data, data in mobile phone identical (data that meet the threshold range setting corresponding in standard database) with a upper left corner screw of disappearance (3) of storing in standard database, control center controls actuating unit by PLC mobile phone (1) crawl of the scarce screw (3) in the screened upper left corner is sorted out and is positioned over the corresponding storeroom of setting in control center.
In like manner as shown in Figure 3, screened mobile phone (1) is by test probe ultrasonic scanning, and central processing unit data processing and with the data in standard database relatively after, control center controls actuating unit by PLC and the screened mobile phone (1) that removes bonnet and top two screws of disappearance (3) is captured to the lay down location of sorting out the mobile phone (1) that is positioned over corresponding top two screws of disappearance (3) that control center sets.
By test probe, by artificial hand-held, and actuating unit is also that the simple replacement that the present invention is done also belongs to protection category of the present invention with the artificial workpiece screening technique replacing.
The foregoing is only the present invention's use, not, in order to limit to the scope of the claims of the present invention, person skilled in the relevant technique, in the situation that not departing from spiritual scope of the present invention, can also make a variety of changes, therefore all technical schemes that are equal to also should belong to category of the present invention.
Claims (2)
1. a method for ultrasound wave screening workpiece, is characterized in that, comprises the following steps:
A sets up the standard database of detected workpiece,
(a1) by test probe, the detected workpiece of theta alignment with required detection scans, control center sends detection signal to detected workpiece transmitting ultrasound wave to the ultrasound wave sending and receiving apparatus in test probe, ultrasound wave sending and receiving apparatus is transferred to the reflected signal collecting the central processing unit being attached thereto, central processing unit carries out data processing to the signal collecting, and the data of handling well are stored in storer and by control center and note with mark and form measured workpiece at the normal data of this specified angle;
(a2) measured workpiece is set up to Data duplication step (a1) with the angle of other required detection;
B carries out data foundation to the required detection angles of screened workpiece and the same angular standard data of setting up in these data and step a is compared;
(b1) threshold value of the normal data of storing in the setting steps a of control center as required;
(b2) test probe being aimed to screened workpiece with required detection angles scans, control center sends detection signal to screened workpiece transmitting ultrasound wave to the ultrasound wave sending and receiving apparatus in test probe, ultrasound wave sending and receiving apparatus is transferred to central processing unit by the reflected signal collecting, central processing unit carries out data processing to the signal collecting, and the normal data with angle in the data of handling well and step a is compared.
(b3) the angle repeating step b2 with other required test to screened workpiece;
C filters out undesirable workpiece;
Control center compares according to the normal data of each corresponding specified angle of setting up in the data of each required detection comparison of screened workpiece in step b and step a, in arbitrarily angled in step b, one group of data do not meet the threshold value of corresponding normal data in step a, screened workpiece is undesirable, and the storeroom setting put into undesirable workpiece grabbing by actuating unit; Topworks will be in b step each angle-data respectively with corresponding angular standard data comparison in a step, each organize corresponding data all the screened workpiece grabbing of identical (in the threshold range of setting) be positioned over another storeroom setting.
2. the method for ultrasound wave screening workpiece as claimed in claim 1, is characterized in that, while setting up the standard database of detected workpiece, according to required, can increase or reduce parts building database repeating steps (a) to measured workpiece.
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| CN201410172339.XA CN103926317A (en) | 2014-04-25 | 2014-04-25 | Method for screening workpieces through ultrasonic wave |
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Cited By (5)
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| CN107505395A (en) * | 2017-08-31 | 2017-12-22 | 北京金风慧能技术有限公司 | Inside workpiece damage detecting method and device |
| CN107703209A (en) * | 2017-08-31 | 2018-02-16 | 北京金风慧能技术有限公司 | Workpiece identification method and detection terminal |
| CN107703210A (en) * | 2017-08-31 | 2018-02-16 | 北京金风慧能技术有限公司 | workpiece identification method and device |
| CN112162041A (en) * | 2020-09-30 | 2021-01-01 | 陕西师范大学 | Method for identifying metal material based on Gaussian distribution of amplitude root mean square value |
| CN113084820A (en) * | 2021-04-22 | 2021-07-09 | 江苏众远智能装备有限公司 | 3D vision robot and grabbing flaw detection method |
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Application publication date: 20140716 |