WO1999022233A1 - Dispositif de detection de defauts par signaux ultrasons pour bandes, profiles ou tubes en matiere plastique en deplacement continu - Google Patents

Dispositif de detection de defauts par signaux ultrasons pour bandes, profiles ou tubes en matiere plastique en deplacement continu Download PDF

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Publication number
WO1999022233A1
WO1999022233A1 PCT/EP1998/006807 EP9806807W WO9922233A1 WO 1999022233 A1 WO1999022233 A1 WO 1999022233A1 EP 9806807 W EP9806807 W EP 9806807W WO 9922233 A1 WO9922233 A1 WO 9922233A1
Authority
WO
WIPO (PCT)
Prior art keywords
signals
measuring heads
tube
level
strip
Prior art date
Application number
PCT/EP1998/006807
Other languages
German (de)
English (en)
Inventor
Torsten Schulze
Original Assignee
Friedrich Theysohn 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 Friedrich Theysohn Gmbh filed Critical Friedrich Theysohn Gmbh
Priority to JP2000518276A priority Critical patent/JP2001521170A/ja
Priority to EP98955524A priority patent/EP1027599A1/fr
Publication of WO1999022233A1 publication Critical patent/WO1999022233A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
    • G01N29/27—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the material relative to a stationary sensor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/96—Safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92247—Optical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92447—Moulded article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92609—Dimensions
    • B29C2948/92647—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9279—Errors or malfunctioning, e.g. for quality control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92942—Moulded article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/10—Number of transducers
    • G01N2291/104—Number of transducers two or more emitters, one receiver
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/269—Various geometry objects
    • G01N2291/2692—Tyres

Definitions

  • the invention relates to a device for error detection and material testing in continuous strips, profiles and tubes with ultrasonic signals, which are distributed from across the width of the strip or profile or the circumference of the tube and stationary measuring heads are introduced into the plastic and their reflected signals from the measuring heads recorded and fed to an evaluation unit.
  • the invention has for its object to provide a device for the complete detection of errors and seamless material testing in continuous strips, profiles and tubes.
  • the measuring heads are arranged next to one another and transversely to the direction of travel of the strip, profile or tube in such a way that they capture the strip or tube without gaps, and that the evaluation unit detects them from the individual Measuring heads for the same unit of length of the strip, profile or tube supplied reflected signals linked together in such a way that only the errors are processed.
  • individual sensors can be combined to form a block or several segments.
  • the signals from adjacent measuring heads are assigned a differential level and / or addition level, each differential level being assigned an error display and each addition level assigned to the adjacent measuring heads being assigned a differential level with error display and an addition level in a subsequent link level.
  • the evaluation unit is supplied with many ultrasound signals from the individual measuring heads for the same length unit of the strip / profile / tube.
  • the large amount of signals is reduced to a few. This makes it possible for the Evaluation unit delivers a manageable result for the subsequent unit / operator.
  • the invention assumes that the signals picked up by two measuring heads are generally only the same if no fault location has been determined. If an error location is determined, it will appear in one of the two signals, so that when the two signals are subtracted, the error location can be clearly identified.
  • FIG. 1 shows a section of a tube wall with four assigned measuring heads in cross section
  • Figure 3 shows an evaluation unit for linking signals.
  • a plurality of measuring heads 1, 2, 3, 4 are arranged around the entire circumference of the tube R, the ultrasonic pulses in initiate the tube R and reflected signals S1, S2, S3, S4 this
  • Typical reflected signals in FIG. 2 are signals S1, S2. With these signals there is a first reflection when it hits the pipe outer wall and a second reflection after passing through the pipe wall on the pipe inner wall. In the two diagrams it is the big swings. The second large deflection is smaller than the first large deflection because the signal was attenuated when it passed through the pipe wall. In addition, the two diagrams include two much smaller swings that are due to defects are. The much smaller deflection in diagram S1 indicates an error in the middle area of the pipe wall, while the significantly smaller deflection in diagram S2 indicates an error on the inner pipe wall. The signal reflected on the inner wall of the pipe and the error signal are reproduced individually only for the sake of better illustration.
  • the electronic evaluation unit shown in FIG. 3 is preferably used to link the signals S1, S2 and further signals S3, S4.
  • the reflected signals S1, S2, S3, S4 supplied by the measuring heads 1, 2, 3, 4 are fed to this evaluation unit at the same time.
  • the signals are linked here at different levels.
  • stage Ml ⁇ there is a difference between the signals S1, S2. If an error signal is contained in the signal S1 or S2, the output signal is stage Ml ⁇ ⁇ O.
  • a monitoring circuit T1 designed, for example, as a trigger, a corresponding alarm signal is emitted in the event of an error.
  • signals S1, S2 are added.
  • the summed signal of the signals S1, S2 is supplied to both a stage M ⁇ for difference formation and a stage M ⁇ for addition in a subordinate logic level.
  • the signals S3, S4 are linked to one another in a corresponding manner. So there is a level M2 ⁇ Difference formation of the signals S3, S4 and in the stage M2 ⁇ a sum formation of the signals S3, S4.
  • the output signal of stage M2 ⁇ is applied to a monitoring circuit T2 designed as a trigger, which gives an alarm signal in the case of an output signal of stage M2 ⁇ ⁇ O.
  • stage M2 ⁇ for sum formation is supplied on the one hand to the already mentioned stage M ⁇ for subtraction and on the other hand to stage M ⁇ for sum formation with the output signal of stage Ml ⁇ taken at the two signals S1, S2.
  • stage M ⁇ in the subordinate link level mentioned is assigned a monitoring circuit T3 designed as a trigger, which in
  • the level M ⁇ for forming the sum in the subordinate link level provides a signal at further levels for forming the difference and for forming the sum in the next link level.
  • the evaluation unit can comprise several linking levels in order to determine the number of links to keep the operator relevant signals as small as possible.
  • the output signal of stage M® for summation in the last link level is a measure of the wall thickness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

L'invention concerne un dispositif de détection de défauts par signaux ultrasons, pour bandes, profilés ou tubes en matière plastique en déplacement continu. A cet effet, des têtes de mesure sont montées à demeure et réparties sur la largeur de la bande ou, cas échéant, à la périphérie du tube, ces têtes de mesure envoyant des signaux ultrasons dans la matière plastique et recevant les signaux réfléchis. Par combinaison mathématique de ces signaux dans des opérations de soustraction et d'addition, on parvient à réduire le nombre des signaux entrant en ligne de compte pour l'évaluation.
PCT/EP1998/006807 1997-10-29 1998-10-27 Dispositif de detection de defauts par signaux ultrasons pour bandes, profiles ou tubes en matiere plastique en deplacement continu WO1999022233A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2000518276A JP2001521170A (ja) 1997-10-29 1998-10-27 プラスチック製のリボン、部分又は管の欠陥を超音波信号により検知するための装置
EP98955524A EP1027599A1 (fr) 1997-10-29 1998-10-27 Dispositif de detection de defauts par signaux ultrasons pour bandes, profiles ou tubes en matiere plastique en deplacement continu

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19747637A DE19747637C2 (de) 1997-10-29 1997-10-29 Einrichtung zur Fehlererfassung bei durchlaufenden Bändern, Profilen oder Rohren aus Kunststoff mit Ultraschallsignalen
DE19747637.6 1997-10-29

Publications (1)

Publication Number Publication Date
WO1999022233A1 true WO1999022233A1 (fr) 1999-05-06

Family

ID=7846904

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/006807 WO1999022233A1 (fr) 1997-10-29 1998-10-27 Dispositif de detection de defauts par signaux ultrasons pour bandes, profiles ou tubes en matiere plastique en deplacement continu

Country Status (4)

Country Link
EP (1) EP1027599A1 (fr)
JP (1) JP2001521170A (fr)
DE (1) DE19747637C2 (fr)
WO (1) WO1999022233A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115352024A (zh) * 2022-08-23 2022-11-18 四川思创博睿工业设计有限公司 一种管材检测设备及检测方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009027598A1 (de) 2009-07-09 2011-01-13 Ge Sensing & Inspection Technologies Gmbh Verbesserte zerstörungsfreie Untersuchung von Hochdruckleitungen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4680966A (en) * 1984-06-15 1987-07-21 U.S. Philips Corporation Apparatus for examining an object by ultrasonic echography
US5533401A (en) * 1994-05-12 1996-07-09 General Electric Company Multizone ultrasonic inspection method and apparatus
WO1996028727A1 (fr) * 1995-03-09 1996-09-19 Southwest Research Institute Verification non destructive de conduites et de tubes a l'aide de sondes magnetostrictives
WO1996034280A1 (fr) * 1995-04-26 1996-10-31 Ico, Inc. Procede et dispositif de test ultrasonore pour elements tubulaires de gisements petroliers a plusieurs diametres

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2806550C2 (de) * 1978-02-16 1982-10-28 Karl Deutsch Prüf- und Meßgerätebau, 5600 Wuppertal Vorrichtung zur automatischen Ultraschall-Prüfung von Rundmaterial
US4740146A (en) * 1986-07-25 1988-04-26 Peter Angelbeck Apparatus for measuring and controlling the wall thickness of plastic pipes
DE4033443A1 (de) * 1989-10-31 1991-05-08 Inoex Gmbh Extrudieranlage fuer kunststoffrohre
JPH08105871A (ja) * 1994-10-04 1996-04-23 Ngk Insulators Ltd 音響電気効果型超音波送受信装置及び超音波送受信方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4680966A (en) * 1984-06-15 1987-07-21 U.S. Philips Corporation Apparatus for examining an object by ultrasonic echography
US5533401A (en) * 1994-05-12 1996-07-09 General Electric Company Multizone ultrasonic inspection method and apparatus
WO1996028727A1 (fr) * 1995-03-09 1996-09-19 Southwest Research Institute Verification non destructive de conduites et de tubes a l'aide de sondes magnetostrictives
WO1996034280A1 (fr) * 1995-04-26 1996-10-31 Ico, Inc. Procede et dispositif de test ultrasonore pour elements tubulaires de gisements petroliers a plusieurs diametres

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115352024A (zh) * 2022-08-23 2022-11-18 四川思创博睿工业设计有限公司 一种管材检测设备及检测方法

Also Published As

Publication number Publication date
DE19747637A1 (de) 1999-05-12
EP1027599A1 (fr) 2000-08-16
JP2001521170A (ja) 2001-11-06
DE19747637C2 (de) 1999-09-30

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