DE1961939A1 - Method and device for recognizing a section of material - Google Patents

Description

Karl Λ. B r o s e

D-8C3 /.,! ',..heii - Puüach
Wier.CiStr.2.T.i '.- 1.7 ^ 0570,7931782

vln / J? o Künchen-Pullach, December 5, 1969

BiIWJ) IX LHiH ¹ UD, Beech Avenue, New Basford., JNiottinRham , iingland

/ experience and / oi'direction for recognizing a section of material

The invention relates to a method and a device for Detection of a section of material.

For example, it is very often necessary in textile plants to measure the used material or the used slope of this material in a line during the production of a section of textile. In textile plants, the yarn or threads that are used often move at a slow speed and it has until now been difficult to measure the time available or to make a test with these yarns. .

"Moreover, in some applications, for example with WiLinn machines, the consumption of one section of the stiffness changes; recognize or za erfu ^ aeu, überei * den Mi ^ Ii Ii ► ■ · ne ο sung ors

Ui- '.orllo -: :( id · tiii'.fLnduifg now a ■ -avfahren z \ iv. ^ Rf ■>:; fc. - ^ i. I odar urküim ^ u eiii-3 uafcei icti .ab tiv .ihn.il · tea and - · α b- ~,. ^: i '; /. c

tfuiitdi.! in i-iiifi- HtIm mifc, 4nor flesohwiniitr ¹ ·: .- ¹ !

8 ^ 6/0980.

n * n ORIGINAL

which is proportional to the production speed of the material, further the shutter is caused to move across a path of light move away between a light source and a detector to generate signals indicative of the beginning and the correspond to each of the selected section. Such signals can thus be used to e.g. measure the boiler temperature to control, so that one recorded the many yarn length needed in one Can measure section of fabric.

Preferably, the present / experience includes determine or find the direction of movement of the diaphragm and distinguish between the signals passing through different directions of movement are generated. This is important for some use cases; it can e.g. the length of yarn used in the manufacture of a given section of knitted fabric as a function of the direction of the knitting process fluctuate.

The light from the light source is advantageously in a point or in a fine line on the audience level the ßlende bundled to a sharp light border * '"·" rl.ie Provide edges of the cover.

The present invention also provides a device for. Detect a material section and this device contains a screen, which is suitable for a movement in a. Orbit is mounted, v / obei the movement in & igic & it contains the frodulrblons velocity of the haterials proportional to i £ fc, .weLbor; the device ain ^ light source-3 and a deb ^ kbor «so daii when moving dt; r ültnls awise-hen the Lisht- ■ .uuilie and the Detekboi ', from the latter signals ■ -rseugt v / er-den, hurry - lein ü / ifang una the end of aua ^ Ji / äh.lben AbachnLfctea ant-

BAD ORIQSNAL 009846/0

In a preferred manner, the diaphragm is provided with a device with the help of which the direction of movement in the web can be detected by the detector. Such a facility can consist of an adjustment or ötab, which is arranged at one end of the diaphragm and from the diaphragm through a .Slit is separated through which the light from the light source can pass.

In an advantageous manner, a device is also provided which can effectively limit the light from the light source to a point or a fine line, leaving a sharp one Light border ** "'· ■" the edges of the oil end.

ns is also coupled to a detector to an electronic circuit arrangement, which strengthened means for / of oignale and having to Unterscneiden between the öignalen generated by the movement direction and the other direction of movement of durcn .Blende.

«Eitero advantages and features of the experience result from the following description of an embodiment referring to the drawing, show in this:

j? y. 1 an embodiment of an optical iaystems;

.cig. d another ü'orni of an optical system; i? ig. ö one embodiment of a bi-end plate;

fig. 4 is a block diagram of an electronic circuit arrangement;

υ ig. i? waveforms generated in the operation of the

Quit after J? Ig. 3 in connection with the Switching according to i ~ ig. 4 are generated;

009846/0980

6 shows a modified embodiment of a diaphragm plate;

Fig. 7 is a block diagram of another

electronic circuit arrangement; and

FIG. 8 shows waveforms generated by the operation of the shutter of FIG. 6 in conjunction with FIG Circuit of Fig. 7 can be generated.

In Fig. 1 an optical system is shown in which light from a lamp 10 with the aid of a lens system 11 onto a plate 12, which has a slit 12a, is focused. Another lens system 13 generates an image of the slit 12 in the plane of movement 15a of a diaphragm, which is not shown in Fig. 1, which, however, is similar to that denoted by I5 in FIG. 2 the image then falls on a photoelectric device 1A- which may be of any conventional shape.

in Fig. 2 another optical system is shown at which a small incandescent light source 16 is arranged so that through it a photoelectric device 17 directly "is illuminated, without the use of lenses or mirrors. The light captured by the device 17 is applied to a narrow light beam with the aid of a slit in a plate 18 reduced, the light beam axis running perpendicular to the direction of the diaphragm movement and the width sufficient is small in order to get a good resolution of the aiendenkanten.

The bezel is shown in Fig. 3 and consists of a main section or plate 20 and a rod 21 at one end extending from the plate through a vertically extending slot 22 separated, is. The rod precedes the plate in this way or backwards relative to the light beam, which depends on the direction of movement of the diaphragm. In the following

0098 ^ 6/0980

In writing, the direction of movement of the diaphragm should be ^{indicated as sighting "A 1} 'or direction" B "according to the arrows in FIG.

That in J? Ig. The electronic system shown in FIG. 4 includes a Amplifier 25 for amplifying the output size from the photoelectric device 15 or 17 »that this amplifier is fed via line 26. The output variable from the amplifier 25 is sent via the lines 27 and 27a to an input of a differentiating UND gate 28 which has a total of two inputs and the output variable then arrives at a bistable circuit via a line 28a 29. Line 27 carrying the output of amplifier 25 also leads to an input of an amplifier 30, which only lets through negative input signals and thereby positive output signals are generated which reach the other input of the bistable circuit 29 via a line 31 and also to an input of a bistable circuit 32. The line 27 also leads to the bistable circuit 32 and through a differentiating IMD gate 33 »that has two inputs has, and via a line 33a to a monostable circuit 34, which is connected to the other input of the gate is connected via a line 34a. The exit on the left side of the bistable circuit 29 is through a line 21 with the input on the right üeite a bistable »Circuit 35 connected, the input of which is on the left from the output of the bistable circuit 32 on the right is controlled via a line 32a. The output on the left side of the bistable circuit 35 sees the second Input variable for the gate 33 via a line 35a.

In operation, the diaphragm is transmitted via the light beam t Move-specifically in Jj'orm a reciprocating movement of the generated production speed in the machine

009846/0980

haterials is proportional. This is achieved by attaching the screen in a suitable manner to a reciprocating part of the existing working mechanism of the nose: in a position that the screen darkens the light when a certain section of fabric is usually ai> the hit or close to the hit, is knitted »The screen can advantageously be arranged so that it can be adjusted so that measurements can be made over different sections of fabric or cutouts. Depending on the direction of movement of the diaphragm, the bar precedes the diaphragm or follows it behind. As a result, in both of the cases, the light beam is covered or darkened for two time periods, one of these periods being short and the other of the periods being very much longer. This long lasting ab-unkeiung corresponds to the trial length. In the direction of movement "A" of the diaphragm, the darkening of the light beam is short and this is followed by longer darkening and vice versa and zv / ar for the direction of movement of the diaphragm "B ¹ .

The operation of the circuit will now be described with reference to the waveforms of FIG. These five diagrams show the waveforms on lines 27, 34a, 21, 35a and 32a in the circuit of FIG The beginning is the monostable circuit 34 and the bistable circuits 29 and 32 in the state corresponding to the left side and the bistable circuit 35 is located in the state corresponding to the right side.

The first signal obtained from the photoelectric device when there is a moving direction "A" is a negatjsr directed. Impulse of short sour, that by covering of the light beam by which the rod 21 is caused. This Pulse is amplified and inverted in amplifier 25 and the positive-going output pulse becomes the monostable. Device 34 supplied, as well as the amplifier 30 and the

009846 / 0980-

BATH ORIGINAL

differentiating "üi ^ U" gates 28 and *> 3 · The amplifier 30 does not allow any positive pulses through and therefore no signals are generated on the line 3 "*. The application of the signal to the iatter 33 has no effect, since ^ner to this gate of the bistable circuit 35 no Eingangsgröasfe abuts IIIn the signal being applied to the monostable device 3 ^ causes However overturning of this device in the right Width corresponding state, which under ninweis to the waveform on the line 3 ^ a recognize 1 ^; iFi-.t, and a positively directed signal is sent to the line 3 ^ -a, which represents an input variable to gate 28, and the other input variable to gate 28 is differentiated and the pulse peak falling before the positive signal appears of line 3 ^ a. This means that no output variable appears at gate 28.

The one-shot device y \ has a Kippdauer nearly equal to three quarters of the dignaldauer, wherein this duration is determined by dTS covering the light beam by the aperture plate 20 and, if so, a second signal is generated by darkening of the light through the front edge of ß lumbar plate iO Both input variables are applied to gate 28 and an output signal is fed to the bistable circuit 29, which causes it to switch to the state corresponding to the one on the right. As a result, a negatively directed oignal is generated on line 2 and an output variable is obtained at connection Ϊ. This output continues until the darkening of the light by the diaphragm plate ceases, at which point the input variable is removed via the line 27 to the gate 28 and a positively directed signal is fed through the amplifier 30 to the right-hand side of the bistable circuit 29 is, whereby this bistable ■ circuit flips over in a state corresponding to the left side, it should be emphasized that the short negative pulse caused by the passage of light between the rod 21 and the

0098 4 6/0980

BADORtGlNAV.

Plate 20 is caused, inverted in amplifier 30 so that a positive-going pulse is applied to the right-hand sides of the bistable circuits 29 and 32 and these should not yet be converted to the state on the left-hand side for whatever reason be in this state.

The negatively directed output signal which appears from the line 21 when the bistable circuit 29 flips over, is also fed to the left side of the bistable circuit 35. This signal has no effect on the bistable circuit 35, which is conductive according to the state corresponding to the right-hand side. However, if the signal on line 21 through Tilting the bistable circuit 29 is removed in its state corresponding to the left side, then the bistable toggles ocircuit 35 in its state corresponding to the left side, whereby a positively directed output appears on line 35a. This positive signal represents the gate 33 represents an input variable.

When the diaphragm moves backwards, the plate 20 precedes the otab 21, and since the differentiated impulse generated by the Line 27 a is fed, before the appearance of a signal on line 3 ^ -a has died down or has dropped out, only one signal arrives at gate 28. This means that no output signal will appear on line 21 and at connection K, the signal which is caused by the darkening of the light beam by the plate 20, however, is fed to the gate 33, and since this gate is a second input variable of of the bistable circuit 35, an output signal is generated and can reach the bistable circuit 32. The latter bistable circuit flips over into its state corresponding to the right-hand side, as a result of which a on line 32 a positive signal arises. This positive signal leaves the bistable circuit 35 in its right-hand side

009846/0980

ORIGINAL BATHROOM

tilt the state and provides an output variable at connection L which lasts until the diaphragm plate 20 passed the light beam. At this point in time the signal on line 27 is directed negatively and becomes inverted in amplifier 30, so that a positively directed Signal arises and reaches the right side of the bistable circuit 32, whereby the bistable circuit 32 in their the state corresponding to the left side overturns. The circuit is then for the next reciprocating motion the aperture ready. The passage of the rod 21 through the light beam, behind the plate 20, causes no generation another signal at connection L, since there is no signal on line 35a and therefore no output variable from gate 33 appears.

As a result, the bistable circuits 29 and 32 ^{are actuated for the duration of the movement direction "A" and the ßewegungsrichting 11} B ", respectively, and the duration of the signals at the connections" K "and" L "while the shutter moves over the light beam "corresponds to the time which is required to produce the section of the fabric that is selected as the sample Since the signals at the connections K and L correspond to different fabrics, the system provides for a measurement for the length of the yarn that was consumed in both directions of action while the selected segment of the fabric was being sewn.

hib the help of the arrangement, which with reference to Figures 3 and 4, the measurements are made over exactly the same section of material for the "A" direction and the notch "B" made. This can be more desirable, since

009846/0980

- ίο -

then the only variable that can be changed is the direction of the action. however, if it is permissible, adjacent sections of material to capture, a simplification of the electronic system can be made, as far as this affects the components used. In this i'all the optical system remains the same, the diaphragm has the i'orm, thanks to the KJecLoch, as illustrated in FIG is, and the switching is then switched to that of the active. 7 modified. In Fig. 8 are the associated wave fora shown.

As can be seen from -Fig. 6, the diaphragm is now equipped with two plates 40 and 41, while the electronic circuit differs from that shown in FIG Gate 44 between the gate 33 and the bistable stage 32 and also the introduction of two further UImD gates 45 and 46, one input to one gate each being fed via the lines 29a and 29b, namely by the output variables from the bistable circuit 29, and the other input to the two gates is fed via a line 32b, namely by the output from the right side of the bistable stage 32. A line 44a connects the line 27 to an input of the gate 44, and the left side of the bistable Stage 32 is connected to the gate 33 and also to the right side of the bistable »stage 29 with the aid of the respective lines 35 ^a and. 35b. In operation, the bistable circuits 29 and 32 and the bistable circuit 34 are all in the state corresponding to the left side, so that a positively directed input variable is thereby fed to the gate 33 via the line 35a when the diaphragm moves in the direction "A "moves, switches the positive signal, causes through the rod 21, the monostable V6rricfasu ~ .r 34 in the state corresponding to the right-hand side and -äira-s ^ gt an input variable gum gate 28 on the ^ ijung 34a- that impulse,

0098 4 6/0980

which is generated when the first diaphragm plate 41 darkens the light beam, then generates an output variable from the gate dti, and the bistable circuit 29 is toggled into the state corresponding to the one on the right. This removes the positive going signal on line 29a and produces a positive signal on line 29b. The bistable circuit 32 is conductive in its left oeite corresponding state, and thus appears on the line 32b so that the gate bignil produce no, 45 and 46 do not output i in size.

The pulse caused by the otab 21 is also fed to the integrating circuit 43 through the gate ei · 3.3. The integrating capacitance begins to charge slowly, however, it discharges when the oignal is removed by the passage of the light beam through the fiaum between the otab 21 and the first -abb3endplatte 41, if the latter plate covers the light, the integrating capacitance has time to charge up to a voltage so that when the leading edge of the shutter plate 40 sufficiently covers the light, an o signal appears on the line 33b to actuate the gate 44-. The other channel of the gate 44 will see I voz'tte on the line 24a, and the output signal leaves the bistable circuit 5c. to the state corresponding to the one on the right.

üin toggling of the bistable circuit 32 generated on the line · J> ?. b a positive signal which reaches the gates 45 and 45 and since a positive signal is present on the line 29b, an output variable appears at the connection E. This output variable remains available until the rear edge of the diaphragm plate hC releases the light beam, at which point in time a negative pulse appears on dex 'line 2 ™ , which is inverted in amplifier 30 and the right side of the bi-unstable

009846/0980 ORIGINAL BATHROOM

circuit 32 is supplied so that this is in the left Page corresponding state tilts. The signal on line 32b is therefore negative and appears at terminal K. no output variable. The switching of the bistable circuit in its state corresponding to the left side produces a positive signal on line 35b which is the bistable circuit 29 in its state corresponding to the left side lets tip over.

With the return movement of the diaphragm in direction "B", the bistable circuit 29 is not switched and the integrating capacitance charges itself sufficiently during the darkening of the light by the first diaphragm plate 40 to supply the required input signal to the gate 44 when the leading edge the aperture plate 41 covers the light beam. The bistable circuit 32 is thus switched to its state corresponding to the right-hand side and a positive signal is sent to the gates 4-5 and 46 via line 32b. Since the bistable circuit 29 is in its state corresponding to the left side, there is a positive oil signal on line 29a, and an output variable is obtained at connection L. This output variable remains until the bistable circuit 32 is reset by the inverted signal which is fed on the line 31 when the rear edge of the diaphragm plate 4 " ¹ releases the light beam.

Thus, the bistable circuit 32 becomes unidirectional switched by the leading edge of the second of the two diaphragm plates regardless of the direction of the back and forth forward movement, and is switched in the other direction by the rear edge of the same aperture plate that gives the light the opportunity to reach the photoelectric cell again, and output values are obtained from the Connections K and L, the diaphragm movement in direction A and

009846/09 80

B correspond in each case. The difference between this arrangement and that of the Pig. 3 and 4 "consists in that the output variables not only in the different directions of the knitting process, but also different "adjacent sections of fabric. The signals can be used to control the yarn measuring equipment in the same way or to regulate, as is done according to FIGS. 3 and 4.

It can be made without departing from the scope of the present invention, many modifications i. One can, for example, differentiate the input signals at amplifier 25 instead of at gates 28 and 33, or one can arrange separate differentiating components at the correct inputs of the gates. In addition, although the invention has been described with reference to a knitting machine for eliminating yarn consumption, the invention can also be used in very different areas for recognizing or detecting material sections.

All technical details that can be seen in the description and shown in the drawing are essential for the invention significant.

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Claims (1)

PA ¹ JEM I ¹ APPLICATIONS 1. Method for recognizing or recording a section of material, characterized in that a diaphragm (15) in a .bahn with a speed or Jj'oIge moves that the production speed of the material is proportional that the B-loin is caused to one Light path between a light source (10) and a detector (14) to cross in order to generate signals that correspond to the beginning and correspond to the end of the selected material section. 2. The method according to claim 1, characterized in that the signals are used to operate a device, that can effectively take the desired measurement during the period of time between signals. 3. Method for capturing a dto ff sections and for Hessen the yarn consumption in the manufacture of this section, characterized in that a diaphragm (15) in a web is moved at a speed proportional to the production speed of the fabric, that further the diaphragm is caused to create a light path between a light source (10) and a detector (14) to cross, and that the oil signals generated by the detector are used to control the yarn measuring device. 4. The method according to any one of the preceding claims, characterized in that the direction of movement of the diaphragm is detected and a distinction is made between signals caused by different directions of movement of the diaphragm v / earth. 009846/0980 5. The method according to any one of the preceding claims, characterized in that the light from the light source on fine point or line on the plane of movement of the aperture is focused to provide a sharp light border for the to create riena edges. b. Device · for carrying out the method according to the preceding Claims, characterized in that a diaphragm (15, 15 '** ür a movement in a path at a speed ingeo'-dnet is the speed of production of the material is proportional that further a light source (.10) and a Jetektor (14, 14) are provided and are arranged so that at a movement of the aperture ^ 15) between the light source (10) and the detector (> 4) t, signals generated by the detector the: the beginning and the end of the selected material section otes correspond. ⁿ . Apparatus according to claim 6, characterized in that the exercising (/ 15) contains a device (20, 21) by which the direction of movement in the web can be determined by the detector (14). α. Device according to claim 7 *, characterized in that the device (.20, 21) consists of an otab (21), which is arranged at one end of the screen, and an islet plate (20), and the otab (2 " ¹ ) and the umbilical plate (20) is separated by a slot (22) through which light from the light source can pass. 9. Device according to any one of claims b to 6, characterized through optical devices (11-13 or 18) that can effectively focus the light from the light source (10) to a point or "a fine line to create a sharp light boundary to be provided for the edges of the cover C'5). 0 0 9 8 4 6/0980 SAD CRiQINAt 10. Device according to any one of claims 6 to 9, characterized in that the detector (14-) is coupled to an electronic circuit arrangement which has an amplifying device (25) to strengthen the dignale and a device (28, 34, 29, 35, 33) to differentiate between the signals which are generated by one and the other of the directions of movement of the diaphragm. 13. The device according to claim 10, characterized in that dsß the circuit contains a bistable device (29) which can be controlled by an IMD gate (28), an input line (34a) to the gate (28) being a monostable device (3 * O, and that further this gate only as a function of can be operated by a direction of movement of the diaphragm (15), the bistable device (29) being switched and an output variable which corresponds to this one Hewegungsz'ichtung generated that further means (30, 31) for resetting the bistable device (29), after which the diaphragm has moved past the light beam, is provided. In that a further UHD gate is provided (33) "L ·. Apparatus according to claim 11, characterized in that the input size von.dem detector (14) is provided and its anäere input variable is provided by switching the bistable device (29) that further a bistable device (32) is provided and can be controlled by the further AND gate (33), the further bistable device (32) being switched during the backward movement of the diaphragm (1-?) in order to generate an output variable which corresponds to the backward direction of movement of the diaphragm, there is also provided an electronic device (30, 31) for resetting the further bistable device (32) after the diaphragm has passed the light beam. BATH ORIGINAL 009846/0980 13. Apparatus according to claim 11 and 12, characterized in that that the device for resetting the bistable devices (29, 32) comprise an inverter amplifier (30), which is interconnected with the detector (14-) and the bistable devices (2 ^, 52) and the Einrangssignale one Can reverse polarity that can be provided when making a cover of the light beam is terminated to build up signals of opposite polarity which the bistable devices are fed. 14. The device according to any one of claims 6 to 13, characterized in that the measuring device by starting si fnale from the detector (14) or from the circuit (at K or L) is controllable to effect a desired measurement during the time period between the signals. 15 · Device for capturing a material section and for Hesse of the G-arn consumption, which in the production of this section occurs, characterized by a diaphragm (15) which arranged for movement at one speed in a path which is proportional to the speed of fabric production is, by a light source (1O), a detector (14) and by a device for guiding the diaphragm between the Lientmielle and the detector, and further through a yarn milling device that can be controlled by the signals generated by the Detektox *. 1f>. ΐexti! product-producing machine, characterized by that pi ο a device according to one of the claims S bir 15 has. 009846/0980 bathroom Blank page