EP0303084A2 - Procédé et dispositif de mesure d'objets sur un parcours de convoyage - Google Patents

Procédé et dispositif de mesure d'objets sur un parcours de convoyage Download PDF

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Publication number
EP0303084A2
EP0303084A2 EP19880111902 EP88111902A EP0303084A2 EP 0303084 A2 EP0303084 A2 EP 0303084A2 EP 19880111902 EP19880111902 EP 19880111902 EP 88111902 A EP88111902 A EP 88111902A EP 0303084 A2 EP0303084 A2 EP 0303084A2
Authority
EP
European Patent Office
Prior art keywords
conveyor track
measuring point
objects
particular according
conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19880111902
Other languages
German (de)
English (en)
Inventor
Helmut Göttgens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rhein-Nadel Automation GmbH
Original Assignee
Rhein-Nadel Automation GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rhein-Nadel Automation GmbH filed Critical Rhein-Nadel Automation GmbH
Publication of EP0303084A2 publication Critical patent/EP0303084A2/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/04—Sorting according to size
    • B07C5/10—Sorting according to size measured by light-responsive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/36—Sorting apparatus characterised by the means used for distribution
    • B07C5/363—Sorting apparatus characterised by the means used for distribution by means of air
    • B07C5/365—Sorting apparatus characterised by the means used for distribution by means of air using a single separation means

Definitions

  • the invention relates to a method according to the features of preamble 1 and a device according to the features of the preamble of claim 6.
  • Such conveyors very often should not only solve the task of feeding objects to downstream processing or processing devices, but in practice it is often required that sorting, specific alignment of the objects, sorting out of incorrectly processed objects etc. is carried out becomes.
  • it is known, for example (cf. DE-Gm 85 34 584), to scan the objects by means of a light barrier beam and to remove objects that are not recognized or recognized as incorrect from the conveyor path by means of a pulsor arranged in the barrier plane.
  • the known measuring methods cannot be used to determine whether the objects that pass the measuring point also meet the requirements with regard to the design of the surface with which they rest on the conveyor track.
  • the object of the invention is to further develop and design the known method and the known device in such a way that, with the simplest possible construction of the measuring point with regard to the conveyor track, reliable detection of objects to be separated out is possible, with the most comprehensive metrological detectability of the Objects.
  • a method according to the invention it is not necessary, for example when used in an oscillating conveyor, to provide a non-oscillating section of the conveyor track in the area of the measuring point. Rather, it is even necessary that there is also an oscillation in the area of the measuring point, which moves the objects by means of micro-throws, thus causing the objects to be lifted off the conveyor track.
  • the lifting of the objects required to carry out the invention can also be achieved in other ways.
  • a series of measurements are subsequently carried out while an object is moving past the measuring device, so that the length of an object can also be determined by a measuring device which records the measured values over the height of the object.
  • a measuring device which records the measured values over the height of the object.
  • the invention therefore further proposes that measured (partial) dimensions are in each case related to a given dimension in the case of an object which has different areas, and relative values thus obtained are compared with stored relative values. If an object has approximately a total length of 6 mm, which can be divided into a first section of 3 mm with a thickness of 2 mm and a second section, likewise with a length of 3 mm, but with a thickness of 4 mm, it can be measured that the first length range represents 50% of the total length and the second length range also. Parts in which the measured partial dimensions do not each represent 50% of the total length must therefore be discarded in this case.
  • the formation of relative values can also be carried out in such a way that the measured partial dimensions are related to the measured overall dimensions. However, as indicated, predetermined stored dimensions can also be used to form the relative values. It is essential that the measured values are not used directly for comparison. At least with regard to length measurements. Thickness measurements can also be used immediately.
  • the measurement is carried out at high frequency, for example a frequency which is between 1 and 20 MHz can be given. A very dense grid of measured values can thus be obtained.
  • the object can then be separated from the conveyor track.
  • the separation is also possible by means of a magnet, for example designed as an electric lifting magnet.
  • the invention proposes that the conveyor track in the area of the measuring point is a partial area of an oscillating conveyor track, that the measuring point is realized by opto-electronic elements and that a comparison of measured values with stored measured values can be carried out.
  • the invention is not limited to the fact that the conveyor track is designed as part of an oscillating conveyor track in the area of the measuring point.
  • Another type of lifting can also be implemented, for example on a pneumatic basis.
  • the measuring point itself is formed by a so-called CCD line.
  • CCD lines are known, for example, from camera technology.
  • several such lines can also be arranged next to one another, in the form of a so-called "array”.
  • Such a light sensor line can have a size of about 3 mm (256 optoelectronic elements ⁇ bixel>) up to 27 mm (2,048 bixel).
  • a further preferred embodiment is based on the fact that such CCD lines are arranged in two dimensions, that is to say, for example, for detecting the height of a transported object and transversely to the conveyor track for detecting the width of a transported object.
  • the conveyor track in the area of the measuring point for example in the case of a vibratory conveyor, is a normal section of a conveyor track of such a vibratory conveyor, it can occur, depending on the width of the conveyor track, that two objects lie side by side or partially, due to the relatively disordered movement of the objects on a vibratory conveyor moving past the measuring point.
  • the objects can also lie so closely one behind the other that misinterpretations of the length can occur in the optoelectronic system.
  • the invention further proposes that the conveyed objects can be separated on the conveyor track in the conveying direction in front of the measuring point.
  • the objects could be braked pneumatically.
  • a mechanical barrier is also conceivable.
  • the system helps itself, as it were, with objects lying side by side or immediately one behind the other, since these are understood to be an object which has impermissible dimensions and are therefore rejected by the system. Depending on the application, this can lead to an undesirable delay, so that it is advantageous to carry out the aforementioned separation.
  • the conveyor track in front of the measuring point has a hump or the like rising above the level of the conveyor track in the area of the measuring point.
  • this hump On the rising side of this hump, the conveyance results in a jam of the objects, while an object that has overcome the apex of the hump experiences acceleration on the falling side and thus moves individually past the measuring point.
  • the conveyor line is interrupted in the area of the measuring point in order to reliably ensure continuous detection of an object moving past its height.
  • the invention proposes that the conveying path in the area of the measuring point be made translucent. In particular, it can be simply slotted or can be transparent. The fact that the slot or the transparent formation is located in the side boundary of the conveyor track in the area of the measuring point, but also in the conveyor track itself, means that objects which are not lifted and which, for example, only slip through the measuring point, can be completely grasped.
  • the measuring device is firmly connected to the vibrating part of the conveyor.
  • the measuring device vibrates with the conveyor. There is no relative movement between the measuring device and the conveyor track.
  • the slot or the transparent design of the conveyor track in the region of the measuring point can advantageously be kept small, so that even very small objects can be measured using the described device.
  • an element is also provided, with which an object is acted on can, after it has passed through the measuring point, be it to separate it, ie to remove it from the conveyor track or to align it in the desired manner.
  • a pneumatic pulsor is suitable for the separation.
  • such facilities as have already been mentioned above.
  • FIG. 1 Shown and described first of all in FIG. 1 is a vibratory spiral conveyor 1, which has a measuring device 2, with which objects can be detected by measuring technology, without special "calmed” sections in the conveyor track 3 being required.
  • the basic structure of a vibratory bowl feeder according to FIG. 1 consists of a basic unit 4, leaf springs 5, which connect the base unit 4 to the parts container 6 and a vibration exciter 7.
  • a linear vibratory conveyor according to FIG. 2 is constructed in a comparable manner in principle.
  • the device according to the invention which is shown in detail in FIG. 3, consists of a CCD line 14 (which in the exemplary embodiment is arranged in the element provided with the reference number 14, but is not shown in detail), which is opposite one of the conveyor track 3 arranged light source 8 is illuminated.
  • the conveyor track 3 is interrupted in the area of the measuring point, in the form of a slot 9, in order to ensure a reliable measurement of the objects 10 moving past the measuring point.
  • the conveyor track 3 has a hump 11 on which the objects 10 move upwards as a result of the vibration movement, whereby they come into close contact with one another. As soon as the objects 10 have overcome the apex 12 of the hump 11, they experience an additional acceleration and occasionally move past the measuring point or the CCD line 14.
  • a pneumatic pulsor 13 can be provided for the rejection.
  • the object 10 ' which has already passed the measuring point, is misaligned, namely its pin-like approach of smaller diameter is on the front, while it should be on the back according to the desired order, the object So it should move around 180 ° on the conveyor track 3. Therefore, in the exemplary embodiment, this object 10 'is removed from the conveyor track 3 by means of the pulsor 13. The same goes with the object in front of the measuring point 10 ⁇ happen when this passes the measuring point.
  • the measuring device 2 is firmly connected to the vibrating part of the vibratory spiral conveyor 1.
  • the measuring device 2 carries out the vibrations of the vibratory spiral conveyor 1.
  • an optimally small slot 9 can be realized, which accordingly enables very small objects to be conveyed and measured using such a system.
  • the rear wall 16 of the vibratory bowl feeder is not shown for clarity, while it is also shown in Fig. 4.
  • the slitting of the rear wall 16 in the area of the measuring point can also be seen. Only for better illustration is the measuring point 14 and the pulsor 13 drawn at a relatively large distance from one another in FIG. 4. In fact, however, these elements are arranged very close to one another in order to be able to carry out the necessary sorting out immediately after the measurement.
  • FIG. 4 the moving past of an object 10 at the measuring point 14 is shown schematically in an enlarged view.
  • the object 10 which is indicated in dashed lines 10 ′′′ in the raised state, follows approximately a zigzag-shaped movement path 15 on the conveyor path 3.
  • the object 10 is raised by the vibration promotion, in the position according to 10 ′′′, and at the same time moved forward.
  • FIG. 4 shows the movement of an object 10 only schematically. In practice, many more movement possibilities occur.
  • the object can tumble, slant, etc. past the measuring point.
  • the metrological detection takes place in the position in which the relevant section of the object is currently moving past the measuring point 10. Therefore, once the measured values are recorded on a log paper running at a constant speed, measurement protocols (idealized representation) result according to FIG. 5.
  • 5 a shows an object 10 to be measured, the first section of which has a length L 1 and a diameter D 1 and the second section of which has a length L 2 and a diameter D 2.
  • 5 b shows a measurement in which the object 10 has moved very slowly past the measuring point. A corresponding number of measurements have been carried out.
  • the lengths L 1 and L 2 therefore appear larger than they actually are for the object to be measured. For this reason, relative values are formed with regard to the lengths, either with predetermined constant values or based on the measured total length and, as already described above, only the relative lengths of the sections to be recorded are compared with one another.
  • the thicknesses D 1 and D 2 correspond almost to the actual values in this example.

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  • Sorting Of Articles (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
EP19880111902 1987-08-10 1988-07-23 Procédé et dispositif de mesure d'objets sur un parcours de convoyage Withdrawn EP0303084A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873726537 DE3726537A1 (de) 1987-08-10 1987-08-10 Verfahren und vorrichtung zur messung von gegenstaenden auf einer foerderstrecke
DE3726537 1987-08-10

Publications (1)

Publication Number Publication Date
EP0303084A2 true EP0303084A2 (fr) 1989-02-15

Family

ID=6333430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880111902 Withdrawn EP0303084A2 (fr) 1987-08-10 1988-07-23 Procédé et dispositif de mesure d'objets sur un parcours de convoyage

Country Status (3)

Country Link
EP (1) EP0303084A2 (fr)
JP (1) JPH01152304A (fr)
DE (1) DE3726537A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995003897A1 (fr) * 1993-08-02 1995-02-09 Sothis Bijoux Procede et machine de tri automatique de pierres precieuses, ou autres objets similaires, selon des criteres dimensionnels
CN105013710A (zh) * 2015-07-14 2015-11-04 苏州佳祺仕信息科技有限公司 一种气流筛选装置
CN110575979A (zh) * 2019-08-27 2019-12-17 福州立洲弹簧有限公司 一种弧形弹簧毛培弹簧自动分选系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0623328A (ja) * 1992-07-08 1994-02-01 Shinko Electric Co Ltd 部品仕分装置
CN104792290B (zh) * 2015-04-27 2017-08-29 湖州剑力金属制品有限公司 汽车安全气囊管件自动全检机的检测装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1571889A (en) * 1976-03-11 1980-07-23 Gec Medical Equipment Ltd Separating apparatus
US4081362A (en) * 1976-07-22 1978-03-28 Fmc Corporation Apparatus for mechanically sorting fruit
DE3312983A1 (de) * 1983-04-12 1984-10-18 Heinz 7070 Schwäbisch Gmünd Meitinger Sortiergeraet fuer mechanische bauteile
DE3331050A1 (de) * 1983-08-29 1985-03-14 Rhein-Nadel Automation GmbH, 5100 Aachen Vorrichtung zur reihenfoermig geordneten zufuhr von werkstuecken mit einem vibrationsantrieb
DE8534584U1 (de) * 1985-12-09 1987-04-02 Rhein-Nadel Automation GmbH, 5100 Aachen Vibrationsförderer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995003897A1 (fr) * 1993-08-02 1995-02-09 Sothis Bijoux Procede et machine de tri automatique de pierres precieuses, ou autres objets similaires, selon des criteres dimensionnels
FR2708489A1 (fr) * 1993-08-02 1995-02-10 Sothis Bijoux Sarl Procédé et machine de tri automatique de pierres précieuses, ou autres objets similaires, selon des critères dimensionnels.
CN105013710A (zh) * 2015-07-14 2015-11-04 苏州佳祺仕信息科技有限公司 一种气流筛选装置
CN110575979A (zh) * 2019-08-27 2019-12-17 福州立洲弹簧有限公司 一种弧形弹簧毛培弹簧自动分选系统

Also Published As

Publication number Publication date
DE3726537A1 (de) 1989-02-23
JPH01152304A (ja) 1989-06-14

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