EP1274519B1 - Procede acoustique pour discriminer des enveloppes en papier et en matiere plastique - Google Patents

Procede acoustique pour discriminer des enveloppes en papier et en matiere plastique Download PDF

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Publication number
EP1274519B1
EP1274519B1 EP01919606A EP01919606A EP1274519B1 EP 1274519 B1 EP1274519 B1 EP 1274519B1 EP 01919606 A EP01919606 A EP 01919606A EP 01919606 A EP01919606 A EP 01919606A EP 1274519 B1 EP1274519 B1 EP 1274519B1
Authority
EP
European Patent Office
Prior art keywords
paper
article
envelope
acoustic signal
mail
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.)
Expired - Lifetime
Application number
EP01919606A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1274519A1 (fr
Inventor
François CHAUME
Jean-Marc Teluob
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.)
Solystic SAS
Original Assignee
Solystic SAS
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 Solystic SAS filed Critical Solystic SAS
Publication of EP1274519A1 publication Critical patent/EP1274519A1/fr
Application granted granted Critical
Publication of EP1274519B1 publication Critical patent/EP1274519B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties

Definitions

  • Disclosed is a method for discriminating in a mail processing machine, paper wrapped mail items, and plastic wrapped mail items.
  • a known technique is based on an optical principle of reflecting a light beam on the envelope to control and measure the reflected energy.
  • the plastic material being more reflective than paper, the discrimination is simple to implement.
  • this optical discrimination technique may be ineffective when the plastic envelopes are dull and / or colored, i.e., when they have a reflectance close to that of the paper.
  • Another known technique is based on a pneumatic principle of deforming the envelope to be controlled by suction and measuring a pressure variation related to this deformation. Since a plastic envelope is generally less rigid than a paper envelope, the discrimination is simple to implement.
  • the patent US 5632381 discloses a method for classifying sheets of paper and cardboard based on the comparison of the acoustic signal produced by the percussion of a ram on the leaves.
  • the patent DE-4217481 proposes to classify objects in paper, aluminum and plastic electrostatically.
  • the object of the invention is to provide an alternative solution for discriminating paper-wrapped mail items and plastic-wrapped mail items that do not have the disadvantages indicated above.
  • the subject of the invention is a method for discriminating paper-wrapped mail items and plastic wrapped mail items, characterized in that it consists in moving each article of mail in front of a box.
  • vacuum member for producing an acoustic signal resulting from a suction effect of the vacuum member on a face of said article as it is moving in front of said vacuum member, and comparing said acoustic signal with a vacuum signal; reference for detecting whether the envelope of said article is paper or plastic.
  • spectral characteristics are extracted from said acoustic signal and said spectral characteristics are compared with corresponding reference values to detect whether the envelope of said article is made of paper or plastic.
  • spectral analyzes of the acoustic signals recorded for plastic-wrapped mail items and acoustic signals recorded for paper-wrapped mail items have shown that the first acoustic signals corresponding to the envelopes made of material all have a characteristic of high amplitude in a certain frequency range that is not found in the acoustic signals corresponding to the paper envelopes.
  • the invention also relates to a device for carrying out the method according to claims 1 and 2.
  • a destacking device postal folds conventionally comprising a magazine 1 loaded with a stack of postal folds such as P1, P2, P3 driven in a certain direction D to an unstacking head comprising a suction nozzle 2 in front of which is moved a perforated strip 3 engaged on return pulleys such as 4.
  • the suction nozzle 2 exerts a suction force in the direction D which tends to press the first fold of the stack loaded in the magazine 1 against the perforated belt 3 so that this fold is moved on edge by the perforated belt in a direction D 'perpendicular to the direction D and is separated from the stack.
  • the unstacking device illustrated in the figure comprises a double (or multiple) plug separator constituted by a suction nozzle 5 which exerts a suction force in the direction opposite to that exerted by the nozzle 2.
  • the nozzle 5 is arranged slightly downstream of the nozzle 2 in the direction D '. As each depressed fold is moved edgewise between the two suction nozzles 2 and 5, the suction nozzles 2 and 5 act on opposite sides of the fold.
  • the suction force of the nozzle 2 is provided substantially greater than that of the nozzle 5 so that if a single fold engages between the two nozzles 2 and 5, it is moved in the direction D 'by the action
  • two plies engage at the same time between the two nozzles 2 and 5, that which is on the side of the nozzle 5 is stopped since it does not undergo the action of the nozzle 2 and the belt 3. of the nozzle 2 while that which is on the side of the nozzle 2 is moved in the direction D 'by the combined action of the nozzle 2 and the belt 3 as indicated above.
  • This controlled and adjustable suction level causes an acoustic signal that is detected by a sensor 6 such as a microphone.
  • a sensor 6 such as a microphone.
  • This sensor 6 is preferably arranged close to the double plug separator and therefore to the nozzle 5 as illustrated in the figure to avoid as much as possible the detection of other parasitic noises produced by the unstacking device.
  • the acoustic signal detected by the sensor 6 is compared with a reference signal to detect whether the envelope of the fold is paper or plastic.
  • the noise level recorded and analyzed for detection is derived from the signal generated by the controlled suction. Permanent suction generates a background noise that is not significant for detection.
  • certain representative spectral characteristics are extracted from the acoustic signal: signal power, spectral lines, signal envelope pattern; to compare them with corresponding reference values to detect whether the envelope is paper or plastic.
  • the extraction of these characteristics can easily be carried out as is known after filtering, digitizing and other treatments on the acoustic signal which are carried out by a data processing unit 7, such as a microcomputer or a specialized circuit providing output information D indicating whether the envelope is paper or plastic.
  • the reference values used for the comparison are constituted simply by recording acoustic signals recorded in the unstacking device for reference plies encased in paper or plastic.

Landscapes

  • Sorting Of Articles (AREA)
  • Making Paper Articles (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Packaging Of Special Articles (AREA)
  • Paper (AREA)
  • Cartons (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP01919606A 2000-04-07 2001-04-02 Procede acoustique pour discriminer des enveloppes en papier et en matiere plastique Expired - Lifetime EP1274519B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0004443 2000-04-07
FR0004443A FR2807347B1 (fr) 2000-04-07 2000-04-07 Procede acoustique pour discriminer des enveloppes en papier et en matiere plastique
PCT/FR2001/000971 WO2001076775A1 (fr) 2000-04-07 2001-04-02 Procede acoustique pour discriminer des enveloppes en papier et en matiere plastique

Publications (2)

Publication Number Publication Date
EP1274519A1 EP1274519A1 (fr) 2003-01-15
EP1274519B1 true EP1274519B1 (fr) 2008-01-23

Family

ID=8848973

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01919606A Expired - Lifetime EP1274519B1 (fr) 2000-04-07 2001-04-02 Procede acoustique pour discriminer des enveloppes en papier et en matiere plastique

Country Status (16)

Country Link
US (1) US6811034B2 (pt)
EP (1) EP1274519B1 (pt)
JP (1) JP2003531719A (pt)
CN (1) CN1196543C (pt)
AT (1) ATE384590T1 (pt)
AU (1) AU2001246668A1 (pt)
BR (1) BR0109858A (pt)
CA (1) CA2404955C (pt)
DE (1) DE60132572T2 (pt)
DK (1) DK1274519T3 (pt)
ES (1) ES2296741T3 (pt)
FR (1) FR2807347B1 (pt)
IL (2) IL150792A0 (pt)
NO (1) NO325993B1 (pt)
PT (1) PT1274519E (pt)
WO (1) WO2001076775A1 (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2835452A1 (fr) * 2002-02-05 2003-08-08 Solystic Procede de detection d'objets plastiques et dispositif de detection
FR2919598B1 (fr) * 2007-08-02 2009-12-04 Solystic Dispositif de convoyage d'envois avec un asservissement sur le taux de rejet
FR2925474B1 (fr) * 2007-12-20 2009-11-27 Solystic Dispositif de depilage d'envois postaux multi-modes
PL2832541T3 (pl) * 2012-03-29 2017-11-30 Innovative Film Solutions Sl Dwukierunkowo zorientowany film polipropylenowy do okienek w kopertach
JP7341727B2 (ja) * 2019-05-28 2023-09-11 株式会社メイキコウ 物品の積み込み装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773321A (en) * 1972-01-11 1973-11-20 Optical Recognition Systems Overlapped document detector
US3802252A (en) * 1972-06-09 1974-04-09 Benthos Inc Pressure and vacuum monitoring apparatus
JPH01134643A (ja) * 1987-11-20 1989-05-26 Fujitsu Ltd バッファ制御方式
US5052875A (en) * 1989-12-29 1991-10-01 Agissar Corporation Automated envelope handling system
DE4217481C2 (de) * 1992-05-22 1995-04-06 Noell Abfall & Energietech Verfahren und Vorrichtung zur Sortierung von Einmalverpackungen
US5419546A (en) * 1994-02-15 1995-05-30 Unisys Corporation Double-document detection arrangement
DE4417257A1 (de) * 1994-05-17 1995-11-23 Deutsche System Technik Sortiervorrichtung zum Sortieren von Fördergut
JPH08252539A (ja) * 1995-03-17 1996-10-01 Toshiba Corp 郵便物処理装置
US5631426A (en) * 1995-08-28 1997-05-20 The Goodyear Tire & Rubber Company Sensors for vibration detection
US6027113A (en) * 1998-10-29 2000-02-22 Banctec, Inc. Multiple document detection system
US6460414B1 (en) * 2000-11-17 2002-10-08 Sonoscan, Inc. Automated acoustic micro imaging system and method

Also Published As

Publication number Publication date
CN1196543C (zh) 2005-04-13
FR2807347A1 (fr) 2001-10-12
CN1404419A (zh) 2003-03-19
US6811034B2 (en) 2004-11-02
IL150792A (en) 2007-07-24
DE60132572D1 (de) 2008-03-13
PT1274519E (pt) 2008-02-25
WO2001076775A1 (fr) 2001-10-18
DE60132572T2 (de) 2009-03-19
CA2404955C (en) 2008-04-01
BR0109858A (pt) 2003-06-03
EP1274519A1 (fr) 2003-01-15
NO20024842D0 (no) 2002-10-07
ATE384590T1 (de) 2008-02-15
DK1274519T3 (da) 2008-06-02
NO325993B1 (no) 2008-09-01
US20030038066A1 (en) 2003-02-27
NO20024842L (no) 2002-10-07
CA2404955A1 (en) 2001-10-18
ES2296741T3 (es) 2008-05-01
FR2807347B1 (fr) 2002-05-24
AU2001246668A1 (en) 2001-10-23
JP2003531719A (ja) 2003-10-28
IL150792A0 (en) 2003-02-12

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