Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
  • D06H3/00—Inspecting textile materials

Definitions

• the present invention relates to a semi-automatic device for continuously locating by an operator the X and Y coordinates of the singular points within a surface such as for example a sheet, a film or fabric or a plate. rigid in motion, or their image on a screen.
• singular points is meant in particular local defects, in particular within a fabric, such as for example defects in material, knitting or weaving or even color defects.
• the term “singular points” also denotes knots or other irregularities which may appear on a plate, notably of wood, or even a local insert. In other words, we define by "singular points” any visible element which distinguishes itself in a uniform unit.
• this device does not allow exact reper ⁇ torier the location of faults.
• this device does not allow exact reper ⁇ torier the location of faults.
• the cutting made within a piece of fabric is a function of the two-dimensional distribution of the defects within said piece.
• the present invention aims to overcome these drawbacks.
• its main goal is to allow location according to two coordinates, that is to say according to the coordinates of the plane observed.
• It relates more particularly to a device allowing the identification of faults on a piece of fabric and which, moreover, also allows the real localization of said faults after constitution of a mattress from this fabric to carry out operations. of clothing.
• the automatic identification and marking of faults has been envisaged for a very long time and has been the subject of numerous publications such as, in particular, in British patent 1,077,561.
• the solution described in this document consists, in general, of scrolling the material to be checked (tissue) on a control plane and of detecting the faults by means of a system using a light source which is captured. by a receiver element disposed on the other side of the face of the textile. Consequently, depending on the quantity of light transmitted, it is therefore possible, starting from a medium level, to detect either an excessive transmission corresponding to a lighter hole or zone in the tissue, or, conversely, a transmission insufficient corresponding to more opaque areas.
• the invention therefore relates to a semi-automatic device for continuously locating the X and Y coordinates of the singular points within a moving surface, of the type comprising: - a control plane on which the said surface to be controlled (or its image) scrolls; *
• the device according to the invention is characterized in that it further comprises: - a means for measuring the width of the material being checked, also making it possible to define the origin of the second Y coordinate;
• a means of locating the second Y coordinate constituted:. on the one hand, a first means of positioning a visible mark along an axis transverse to the displacement of the surface, and constituting the locating axis of the second coordinate (Y), the movement is controlled by an operator in order to bring said visible reference point into line with the singular point detected; . on the other hand, a second means, also controlled by an operator, making it possible to enter and / or record the position of said reference point with respect to one of the longitudinal edges of said surfing ce.
• the invention proposes a device making it possible to locate the two coordinates of one of the singular points liable to appear on a surface and to record them in order to deliver an accurate statement of the two-dimensional distribution of said singular points.
• first and second means are controlled by the operator from the same member, such as for example a manipulator, a keyboard, or even the operator's finger acting directly on said first means which can be constituted, by example, of a ruler with receiving cells, a keyboard with sensitive keys, a position detector of the digital tablet type enabling pointing directly to the fault;
• said control member of said first and second means consists of a manipulator capable of moving according to two degrees of freedom, the displacement according to one of said degrees of freedom controlling the movement of the visible reference mark of the first means and the following movement, said second degree of freedom commanding scrolling in one direction or the other within the central unit for entering and recording a code listing the different categories of singular points;
• Said first means of positioning the visible mark is chosen from the group comprising a photodiodes ramp, a mechanical cursor, a light spot, or even, at the limit, directly by the action of the operator who performs manual pointing, for example using a pen;
• the first means of moving the visible marker being integrated into a rule called "entry rule” is located at the control plane;
• the entry rule comprises slides per ⁇ putting the fixing and the adjustment in position of sensors measuring the dimension perpendicular to the displacement of the surface to be checked;
• the present invention also relates to a semi-automatic device for continuously locating the X and Y coordinates of local faults within a fabric or fabric in motion, of the type comprising: a control plane on which said fabric or fabric to be inspected runs, this control plane being provided with a lighting member of said plane; . a pair of call rollers located on either side of said control plane; . means for measuring the running length of the fabric or fabric to be checked, defining a first coordinate; . a transverse entry rule with respect to the scrolling comprising slides allowing the fixing and adjustment in position of width sensors; . a central input and recording unit, characterized in that it further comprises: - means for measuring the width of the material being checked;
• a second means also controlled by an operator, making it possible to enter and / or record the position of said reference point; - in that said first displacement means is constituted by a photodiodes ramp integrated within said transverse capture rule;
• the manipulator can be moved by the operator according to two degrees of freedom, the displacement on the first degree of freedom controlling the displacement of the visible mark on the photodiode array, and the displacement of the manipulator according to the second degree of freedom controlling the scrolling in one direction or the other of a code on a display within the central unit listing the different categories of faults observed within the fabric.
• Figure 1 shows a schematic perspective view of a locating device * in X and Y coordinates of a surface, in accordance with the present invention.
• FIG. 2 is a schematic view illustrating the manner in which detectable milestones are placed on the edge of the fabric and how the positioning and memorization by the operator of the positions " (X) and (Y) are carried out faults.
• the locating device basically comprises a reading plane (1), slightly inclined, having an opening closed by a frosted glass (2). Behind this frosted glass is located a light source emitting through said frosted glass.
• Said inclined plane (1) comprises along two of its opposite edges two rollers (3,4) intended to allow the movement of the piece of fabric (10) controlled. These rollers (3) and (4) are conventionally driven by a motor, not shown;
• a data entry rule (5) is fixed (a rule consisting for example of 192 indicator lights located every centimeter), located transversely to the direction of travel of the piece of fabric to be checked.
• This gripping rule furthermore comprises slides, not shown, allowing the fixing and the adjustment in position of width sensors (8) and (9) serving as elements for controlling the width of the fabric.
• width means the width of the piece of fabric.
• these sensors consist of a plurality of photoelectric cells having an average center distance of the order of five millimeters. The variations in width are recorded within the central unit (11) and, conventionally, only the minimum width, the maximum as well as the average width of said piece of fabric finally emerge.
• the gripping rule (5) further comprises at its forehead, that is to say at the level of the meeting of the piece of fabric which moves with said rule, a ramp of photodiodes (15), of which 1 ' lighting is controlled by a manipulator (12) located at the level of a central input and recording unit (11), the latter being electrically connected to the input rule (5).
• a measuring wheel (6) intended to measure the length of the movement of the piece of fabric (10), is fixed by means of a support (7) to the grip rule (5).
• This metering wheel makes it possible in particular to measure the length of each of the pieces of fabric.
• the central input and recording unit (11) comprises a keyboard (13) making it possible to record the code or the reference of the piece of fabric checked. It also includes a display (14) for viewing the reference of the piece of fabric as well as the code listing the identified fault. The selection of one or other of the indices of the code likely to be displayed on the member (14) is carried out by the intermediary of the manipulator (12) by actuating it on one of its two degrees of freedom.
• the central input and recording unit (11) comprises a printer which delivers, at the point of control of each piece of fabric, a label intended to be affixed to said piece of fabric (10 ), said label comprising, in addition to the reference of said piece of fabric, the extremes and the average of the width of said pieces, the type of defect identified and for each defect their X and Y coordinates.
• the piece of fabric (10) intended to be controlled being in place on the control plane (1), its advance ⁇ ment is controlled by means of a pedal (not shown) actuated by the operator.
• a pedal not shown
• the control of the movement of the piece of fabric (10) can be ensured at the level of the manipulator (12) by simple rotation of said manipulator. In this case, the latter would then have three degrees of freedom.
• the operator sees a fault of any kind, it causes it ; positioning (displacement) of the visible marker constituted in the embodiment described by the illumination of one of the photodiodes constituting the ramp (15), and makes said visible marker correspond with the defect observed.
• the operator presses the end of the manipulator (12), thus causing the immediate entry of the X, Y coordinates of the identified fault. This entry must then be stored in the central entry and recording unit (11). Simultaneously, the operator actuates the manipulator (12) according to another degree of freedom in order to select the category of the identified fault. Once the category has been determined, the operator also causes it to be entered by simply pressing the end of the manipulator (12). The category of the fault identified is then also recorded in the central data entry and recording unit.
• the operator then continues to check the pieces of fabric (10) by again scrolling said piece.
• the identification of faults within the piece of fabric is carried out by a simple back-and-forth movement of the visible mark in this case constituted by photodiodes, thus transforming an activity particularly tedious in an almost fun activity.
• the exact two-dimensional determination of the distribution of defects within a part of fabric but also within any surface, or its image on a screen allows an optimization of their use hence a significant saving.
• the device according to the invention is applied to locating singular points of any type of flat surface, and in particular in the textile industry in locating local faults.
• Such a fault identification system can, as illustrated by FIG. 2, be used to allow the actual location of said faults after constitution of a mattress.
• This actual position is recorded as well as the number of the sheet where the defect is located.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Materials Engineering (AREA)
• Textile Engineering (AREA)
• Treatment Of Fiber Materials (AREA)
• Length Measuring Devices With Unspecified Measuring Means (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=9353231

Family Applications (1)

Country Status (3)

Families Citing this family (2)

Family Cites Families (1)

• 1987
  • 1987-07-09 FR FR8710093A patent/FR2617958B1/fr not_active Expired - Lifetime
• 1988
  • 1988-07-06 WO PCT/FR1988/000360 patent/WO1989000623A1/fr not_active Ceased
  • 1988-07-06 EP EP19880905904 patent/EP0322436B1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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