EP0329618A1 - Magnetischer Fühler zur Feststellung eines Fadenbruchs an Ringspinnmaschinen - Google Patents

Magnetischer Fühler zur Feststellung eines Fadenbruchs an Ringspinnmaschinen Download PDF

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Publication number
EP0329618A1
EP0329618A1 EP89830038A EP89830038A EP0329618A1 EP 0329618 A1 EP0329618 A1 EP 0329618A1 EP 89830038 A EP89830038 A EP 89830038A EP 89830038 A EP89830038 A EP 89830038A EP 0329618 A1 EP0329618 A1 EP 0329618A1
Authority
EP
European Patent Office
Prior art keywords
stage
magnetic sensor
integrated circuit
signal
resistor
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Withdrawn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
EP89830038A
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English (en)
French (fr)
Inventor
Ermanno Rondi Totto
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.)
INCAS SpA
Original Assignee
INCAS SpA
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 INCAS SpA filed Critical INCAS SpA
Publication of EP0329618A1 publication Critical patent/EP0329618A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a magnetic sensor for detecting or sensing the breakage of the thread on ring spinning machines including a metal slider ring member.
  • the task of the present invention is to overcome these drawbacks by providing a sensor for detecting the breakage of the thread on ring spinning machines which is not affected by the operating environmental condition and which,in particular, is based on the detection of the variation of a magnetic field caused by a moving slider ring member by means of the known Hall effect.
  • a main object of the present invention is to provide such a Hall effect magnetic sensor including a single integrat­ed circuit or IC.
  • Another object of the present invention is to provide such a magnetic sensor which is very simple construction-wise and very reliable in opera­tion.
  • a magnetic sensor for detecting the breakage of the thread in ring spinning machines, including a slider ring member,characterized in that said sensor essentially comprises a Hall effect device adapted to detect the variation of the magnetic field therethrough,due to the rotation of said slider ring member,so as to cause a corresponding variation of an output analogic signal,said signal being amplified in a first stage of an integrated circuit to be process­ed in a subsequent stage adapted to square and adjust said amplified signal to provide a square wave the low level part of which has a constant duration and a fre­quency equal to the number of revolutions of said slider ring member,said integrated circuit including a further cascade stage for generating an analogic voltage signal the amplitude of which is proportional to the frequency of the signal at the input of said further cascade stage,and with a last stage of said integrated circuit adapted to set the minimum
  • the magnetic sensor for sensing or detecting the breakage of the thread in ring spinning machines comprises a Hall effect device,indicated overally at the reference number 1 which is power supplied by the power supply block 2 consisting of a voltage source preferably of the 78L05 type having a 5V output.
  • a magnet member 3 is provided for sensing or detecting the movement therethrough of a slider ring member included in the ring spinning machine and providing an analogic signal having a DC component of about 2V and a variable component of the order of some mV's.
  • the device further comprises a capacitor 4 operating to level off possible RF noise,whilst the capacitor 5 is provided for CA coupling the first stage 6 of an integrated circuit,preferably of the LM3900 type operating as an amplifier.
  • This amplifier stage is biased through a resistor 7,the resistors 8 and 9 defining by their ratio,as it should be apparent to those skilled in the art,the amplifying factor.
  • the second stage 10 of the integrated circuit consists essentially of a monostable multi­vibrator the trigger pulse of which is applied through a further capacitor 11 and a further resistor 12 which,by changing the current balance in this stage, causes the capacitor 13 to discharge on the resistor 31 so as to switch to the 0 level the output of this stage.
  • the resistor 21 moreover,sets the voltage gain of this stage.
  • the fourth stage 23 of the integrated circuit is a Schmitt trigger,in which the resistor 24 provides an electric bias which,at the junction point with a suitable resistor 25,sets the operation threshold of this trigger circuit as well has its hysteresis width.
  • the resistor 26 is provided to supply the trigger circuit with the signal of the tachometer 20,in order to provide at the output an information related to the speed of the slider ring member.
  • the integrated circuit,indicated overally at the reference number 27 and the above disclosed components are wired on a board of the printed type 28,potted in a resin material preferably of the epoxidic type.
  • This board is enclosed in a casing 29 and is power supplied by a three wire cable 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP89830038A 1988-02-16 1989-02-03 Magnetischer Fühler zur Feststellung eines Fadenbruchs an Ringspinnmaschinen Withdrawn EP0329618A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1942888 1988-02-16
IT8819428A IT1215888B (it) 1988-02-16 1988-02-16 Sensore magnetico, atto a rilevare la rottura del filo su filatoi ad anello, o ring, con anellino cursore metallico.

Publications (1)

Publication Number Publication Date
EP0329618A1 true EP0329618A1 (de) 1989-08-23

Family

ID=11157841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89830038A Withdrawn EP0329618A1 (de) 1988-02-16 1989-02-03 Magnetischer Fühler zur Feststellung eines Fadenbruchs an Ringspinnmaschinen

Country Status (2)

Country Link
EP (1) EP0329618A1 (de)
IT (1) IT1215888B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0442327A1 (de) * 1990-02-14 1991-08-21 Zignago Tessile Spa Vorrichtung zum Prüfen der Anwesenheit von Fäden in Spinnmaschinen
EP0786026B2 (de) † 1994-10-20 2005-07-27 STARLINGER & CO. GESELLSCHAFT MBH Einrichtung zur überwachung der schussfäden an einer rundwebmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930179A (en) * 1958-11-03 1960-03-29 Adams Inc Control system for textile machines
US3102378A (en) * 1961-02-28 1963-09-03 Adams Inc Textile strand control device
FR1518050A (fr) * 1966-02-17 1968-03-22 Belge D App De Radio Cobar Con Perfectionnements aux machines textiles
CH556923A (de) * 1973-04-05 1974-12-13 Zellweger Uster Ag Verfahren und vorrichtung zur laufenden ueberwachung von verarbeitungsmaschinen der textilindustrie.
FR2260643A1 (de) * 1974-02-11 1975-09-05 Montefibre Spa

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930179A (en) * 1958-11-03 1960-03-29 Adams Inc Control system for textile machines
US3102378A (en) * 1961-02-28 1963-09-03 Adams Inc Textile strand control device
FR1518050A (fr) * 1966-02-17 1968-03-22 Belge D App De Radio Cobar Con Perfectionnements aux machines textiles
CH556923A (de) * 1973-04-05 1974-12-13 Zellweger Uster Ag Verfahren und vorrichtung zur laufenden ueberwachung von verarbeitungsmaschinen der textilindustrie.
FR2260643A1 (de) * 1974-02-11 1975-09-05 Montefibre Spa

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0442327A1 (de) * 1990-02-14 1991-08-21 Zignago Tessile Spa Vorrichtung zum Prüfen der Anwesenheit von Fäden in Spinnmaschinen
EP0786026B2 (de) † 1994-10-20 2005-07-27 STARLINGER & CO. GESELLSCHAFT MBH Einrichtung zur überwachung der schussfäden an einer rundwebmaschine

Also Published As

Publication number Publication date
IT8819428A0 (it) 1988-02-16
IT1215888B (it) 1990-02-22

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