SE520804C2 - Piezoelectric device for monitoring yarn tension or movement, has piezoelectric component secured to bendable part of circuit board - Google Patents
Piezoelectric device for monitoring yarn tension or movement, has piezoelectric component secured to bendable part of circuit boardInfo
- Publication number
- SE520804C2 SE520804C2 SE0202025A SE0202025A SE520804C2 SE 520804 C2 SE520804 C2 SE 520804C2 SE 0202025 A SE0202025 A SE 0202025A SE 0202025 A SE0202025 A SE 0202025A SE 520804 C2 SE520804 C2 SE 520804C2
- Authority
- SE
- Sweden
- Prior art keywords
- circuit board
- wire
- piezo
- piezo element
- fingers
- Prior art date
Links
- 238000012544 monitoring process Methods 0.000 title 1
- 239000004753 textile Substances 0.000 claims abstract description 4
- 238000009958 sewing Methods 0.000 claims abstract description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/40—Applications of tension indicators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
- B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
- B65H63/04—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to excessive tension or irregular operation of apparatus
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
- D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
- D01H13/1616—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material characterised by the detector
- D01H13/1633—Electronic actuators
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
- D01H13/20—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to excessive tension or irregular operation of apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
- G01L5/108—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means for measuring a reaction force applied on a single support, e.g. a glider
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
l5 i G C) 25 30 35 520 804 2 skala den i fig 3 inringade delen. Fig 5 visar en sektion längs linjen V-V i fig 1. Fig 6 visar i stor skala en tvärsektion längs linjen VI-VI i fig 1 Fig 7 visar i stor skala en tvärsek- tion längs linjen VII-VII i fig 1. Fig 8 visar i stor skala den i fig l inringade och med VIII markerade delen. 15 in G C) 25 30 35 520 804 2 scale the part circled in fig. Fig. 5 shows a section along the line VV in Fig. 1. Fig. 6 shows on a large scale a cross-section along the line VI-VI in Fig. 1. Fig. 7 shows on a large scale a cross-section along the line VII-VII in Fig. 1. Fig. 8 shows on a large scale the part circled in Fig. 1 and marked with VIII.
Den på ritningarna visade utföringsformen av föreliggande upp- finning har ett kretskort 1 med ett antal fingrar 2,3,4,5,6, 7,8,9,lO,11 och 12. Kretskortet 1 i fig 1 har således elva fing- rar och kan övervaka elva trådar, eftersom det finns ett finger 2-12 för varje tråd. Vid övergången mellan kretskortet 1 och varje finger 2 finns ett piezoelektriskt element 13, som visar närmare i detalj i fig 4,6,7 och 8. De piezoelektriska elementen 13 är lämpligen limmade på kretskortet 1 med exempelvis Araldit men det är naturligtvis möjligt att fästa piezoelementen 13 på kretskortet 1 pa annat satt än med ett lim. Ett sådant piezoele- ment 13 kan ha en längd på 12mm, en bredd på 6mm och en tjocklek på lmm Under piezoelementet 13 har varje finger 2-12 en urtagning 14.The embodiment of the present invention shown in the drawings has a circuit board 1 with a number of fingers 2,3,4,5,6, 7,8,9, 10, 11 and 12. The circuit board 1 in Fig. 1 thus has eleven fingers. and can monitor eleven threads, as there is a finger 2-12 for each thread. At the transition between the circuit board 1 and each finger 2 there is a piezoelectric element 13, which shows in more detail in Figs. 4, 6, 7 and 8. The piezoelectric elements 13 are suitably glued to the circuit board 1 with for example Araldit but it is of course possible to attach the piezo elements 13 on the circuit board 1 in a manner other than with an adhesive. Such a piezo element 13 can have a length of 12 mm, a width of 6 mm and a thickness of 1 mm. Under the piezo element 13, each finger 2-12 has a recess 14.
Varje finger 2-12 har vidare en trådskoning 15. Denna tråd- skoning 15 kan aven utgöras av en trådstyrning i form av en ögla eller något liknande. Denna trådskoning l5 är beständig mot för- slitning på grund av trädens beröring av densamma. Trådskoningen 15 kan vara tillverkad av en aluminiumoxid och limmas på plats.Each finger 2-12 further has a wire cone 15. This wire cone 15 can also be constituted by a wire guide in the form of a loop or the like. This wire cone 15 is resistant to wear due to the trees' contact with it. The wire cone 15 can be made of an alumina and glued in place.
Den träd, som skall övervakas, sträcker sig i längdriktningen av fingrarna 2-12 i en lämplig vinkel för god beröring av tråd- skoningen 15 och för böjning av fingrarna 2-12 vid upprättandet av en viss spänning i tråden. Böjningen av ett finger 2-12 blir naturligtvis större ju högre spänningen i tråden är.The tree to be monitored extends longitudinally of the fingers 2-12 at a suitable angle for good touch of the wire shoe 15 and for bending the fingers 2-12 when establishing a certain tension in the wire. The bend of a finger 2-12 naturally becomes greater the higher the tension in the thread.
Vid böjningen av fingrarna 2-12 medelst en tråd, som anspännes mot trädskoningen l5, hamnar böjningscentrum nära övergången mellan kretskortet 1 och fingrarna 2-12 och kommer det piezo- elektriska elementet 13 att utsättas för en mekanisk påkänning, vilken innebär att piezoelementet 13 kommer att utsättas för en sammanpressning och därmed en tryckpåkänning. Såsom påpekats (fl 10 25 LA) CJ 520 804 3 ovan är piezoelementen 13 fästa på kretskortet 1 enbart vid än- darna och urtagningarna 14 frilägger allt utom ändarna från kretskortet 1, så att enbart ändarna av piezoelementen 13 är i beröring med kretskortet 1. Detta ger en synnerligen jämn och ostörd signal. Sammanpressningen av piezoelementet 13 kommer att medföra en laddningsförändring hos piezoelementet 13, som ger upphov till en elektrisk signal i en elektronisk krets, som är kopplad till piezoelementet 13. Den alstrade signalen kommer att variera i motsvarighet till spänningen i tråden och/eller rörel- sen av tràden. De tva ytorna på piezoelementet 13 har var sin elektrisk ledare, som är kopplade till den elektronisk kretsen pà kretskortet 1, vilken kan innefatta en laddningsförstärkare, och andra signalbehandlingskretsar för filtrering och frekvens- begränsning av den alstrade signalen. Vidare kan elektronik- kretsen innefatta en s k MUX-krets för val av det piezoelek- som skall avläsas och därmed den tråd, triska element 13, som skall övervakas. Den pà kretskortet 1 anordnade elektroniska kretsen är kopplad till ett kontaktelement 16, vilket är fäst på kortet och vilket är avsett för anslutning av anordningen till som användes för styrning, en reglerkrets, t ex reglering av en tradbroms eller liknande av den maskin, i eller på vilken anord- ningen är monterad.When bending the fingers 2-12 by means of a wire which is clamped against the tree cone 15, the bending center ends up near the transition between the circuit board 1 and the fingers 2-12 and the piezoelectric element 13 will be subjected to a mechanical stress, which means that the piezo element 13 will to be subjected to a compression and thus a compressive stress. As pointed out (fl 10 25 LA) CJ 520 804 3 above, the piezo elements 13 are attached to the circuit board 1 only at the ends and the recesses 14 expose everything except the ends of the circuit board 1, so that only the ends of the piezo elements 13 are in contact with the circuit board 1. This gives an extremely smooth and undisturbed signal. The compression of the piezo element 13 will cause a charge change of the piezo element 13, which gives rise to an electrical signal in an electronic circuit, which is connected to the piezo element 13. The generated signal will vary according to the voltage in the wire and / or the movement. of the thread. The two surfaces of the piezo element 13 each have their own electrical conductor, which is connected to the electronic circuit on the circuit board 1, which may comprise a charge amplifier, and other signal processing circuits for filtering and frequency limiting the generated signal. Furthermore, the electronics circuit may comprise a so-called MUX circuit for selecting the piezoelectric to be read and thus the wire element 13 to be monitored. The electronic circuit arranged on the circuit board 1 is connected to a contact element 16, which is attached to the board and which is intended for connection of the device to which is used for control, a control circuit, e.g. control of a wire brake or the like of the machine, in or on which the device is mounted.
Det är naturligtvis av vikt att kretskortet 1 är monterat med stor säkerhet med hjälp av exempelvis monteringshål 17, eftersom fingrarna 2-12 skall böjas med den eller de övervakade trådarna.It is of course important that the circuit board 1 is mounted with great safety by means of, for example, mounting holes 17, since the fingers 2-12 are to be bent with the monitored wire or wires.
Med den s k MUX-kretsen väljes den tråd, som skall övervakas vid varje enskilt tillfälle eller vid varje enskilt stygn.With the so-called MUX circuit, the wire that is to be monitored at each individual occasion or at each individual stitch is selected.
I en ytterligare utföringsform av anordningen enligt före- liggande uppfinning kan kretkortet 1 ha färre fingrar än vad som Exempelvis kan kortet ha enbart två på avstånd t ex 2 och 12 eller 3 och ll el- visas i fig 1. frän varandra belägna fingrar, ler liknande, vilka är förbundna med varandra medelst en mellan fingrarna sig sträckande tràdskoning i form av en stång eller pinne, pä vilken alla de trädar, som skall övervakas, får plats, varvid båda piezoelementen kan vara inkopplade till den elektro- niska kretsen pa kretskortet.In a further embodiment of the device according to the present invention, the circuit board 1 may have fewer fingers than what. For example, the board may have only two at a distance, for example 2 and 12 or 3 and 11 or shown in Fig. 1. similar, which are connected to each other by means of a wire cone extending between the fingers in the form of a rod or pin, on which all the wires to be monitored are placed, whereby both piezo elements can be connected to the electronic circuit on the circuit board.
Uï 15 20 [\) Lfl LA) 9-1 520 804 4 Anordningar enligt föreliggande uppfinning kan även användas för detektering av knutar på träden eller trådarna. Således kan den elektroniska kretsen vara utformad på många olika sätt för ut- som skall över- värdering av den alstrade signalen, val av tråd, vakas, och styrning av textilmaskinen eller symaskinen.Devices according to the present invention can also be used for detecting knots on the trees or wires. Thus, the electronic circuit can be designed in many different ways for over- evaluation of the generated signal, selection of thread, guarding, and control of the textile machine or sewing machine.
Manga modifieringar är naturligtvis möjliga inom ramen för den i de efterföljande patentkraven definierade uppfinningstanken.Many modifications are, of course, possible within the scope of the inventive concept defined in the appended claims.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0202025A SE520804C2 (en) | 2002-06-28 | 2002-06-28 | Piezoelectric device for monitoring yarn tension or movement, has piezoelectric component secured to bendable part of circuit board |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0202025A SE520804C2 (en) | 2002-06-28 | 2002-06-28 | Piezoelectric device for monitoring yarn tension or movement, has piezoelectric component secured to bendable part of circuit board |
Publications (3)
Publication Number | Publication Date |
---|---|
SE0202025D0 SE0202025D0 (en) | 2002-06-28 |
SE0202025L SE0202025L (en) | 2003-08-26 |
SE520804C2 true SE520804C2 (en) | 2003-08-26 |
Family
ID=20288375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE0202025A SE520804C2 (en) | 2002-06-28 | 2002-06-28 | Piezoelectric device for monitoring yarn tension or movement, has piezoelectric component secured to bendable part of circuit board |
Country Status (1)
Country | Link |
---|---|
SE (1) | SE520804C2 (en) |
-
2002
- 2002-06-28 SE SE0202025A patent/SE520804C2/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE0202025L (en) | 2003-08-26 |
SE0202025D0 (en) | 2002-06-28 |
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Legal Events
Date | Code | Title | Description |
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NUG | Patent has lapsed | ||
NUG | Patent has lapsed |