EP1274519A1 - 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 plastiqueInfo
- Publication number
- EP1274519A1 EP1274519A1 EP01919606A EP01919606A EP1274519A1 EP 1274519 A1 EP1274519 A1 EP 1274519A1 EP 01919606 A EP01919606 A EP 01919606A EP 01919606 A EP01919606 A EP 01919606A EP 1274519 A1 EP1274519 A1 EP 1274519A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- plastic
- envelope
- article
- acoustic signal
- 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.)
- Granted
Links
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
- the invention relates to a method for discriminating in a mail item processing machine, mail items wrapped in paper and mail items wrapped in plastic.
- a known technique is based on an optical principle consisting in causing a light ray to reflect on the envelope to be checked and in measuring the reflected energy.
- Plastic being more reflective than paper, discrimination is simple to implement.
- this optical discrimination technique can prove to be ineffective when the plastic envelopes are matt and / or colored, that is to say when they have a reflectance close to that of paper.
- Another known technique is based on a pneumatic principle consisting in deforming by suction the envelope to be checked and in measuring a pressure variation linked to this deformation. As a plastic envelope is generally less rigid than a paper envelope, discrimination is simple to implement.
- 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 sheets.
- the Patent DE-4217481 proposes to classify paper, aluminum and plastic objects electrostatically.
- the object of the invention is to propose another solution for discriminating mail items put in a paper envelope and mail items put in a plastic envelope which does not have the drawbacks indicated above.
- the subject of the invention is a method for discriminating between mail items placed in a paper envelope and mail items placed in a plastic envelope, characterized in that it consists in moving each mail item in front of a vacuum member to produce an acoustic signal resulting from a suction effect of the vacuum member on one side of said article while it is moving in front of said vacuum member, and to compare said acoustic signal with a signal reference to detect if the envelope of said article is made of paper or plastic. More particularly, according to the invention, extract from said acoustic signal spectral characteristics and compare said spectral characteristics with corresponding reference values to detect whether the envelope of said article is made of paper or plastic.
- a device for unstacking postal envelopes conventionally comprising a magazine 1 loaded with a stack of postal envelopes such as P1, P2, P3 driven in a certain direction D towards an unstacking head comprising a suction nozzle 2 in front of which is moved a perforated strip 3 engaged on deflection 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 displaced 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) outlet separator constituted by a suction nozzle 5 which exerts a suction force in the opposite direction to that exerted by the nozzle 2.
- the nozzle 5 is arranged slightly downstream of the nozzle 2 in the direction D '. As each unstacked fold is moved on edge between the two suction nozzles 2 and 5, the suction nozzles 2 and 5 act on opposite faces 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 ply engages between the two nozzles 2 and 5, it is moved in the direction D 'by the action nozzle 2 and belt 3 combined.
- This sensor 6 is preferably placed near the double tap separator and therefore of 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 made of paper or plastic.
- the noise level recorded and analyzed for detection comes from the signal generated by the controlled suction.
- the permanent suction generates an insignificant background noise for detection.
- certain representative spectral characteristics are extracted from the acoustic signal: signal power, spectral lines, signal envelope model; to compare them to corresponding reference values in order to detect whether the envelope is made of paper or plastic.
- the extraction of these characteristics can easily be carried out as is known after filtering, digitization and other processing 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 made of paper or plastic.
- the reference values used for comparison are formed simply by recording acoustic signals recorded in the unstacking device for reference folds wrapped in paper or plastic material.
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)
Description
Claims
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 true EP1274519A1 (fr) | 2003-01-15 |
EP1274519B1 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 (fr) |
EP (1) | EP1274519B1 (fr) |
JP (1) | JP2003531719A (fr) |
CN (1) | CN1196543C (fr) |
AT (1) | ATE384590T1 (fr) |
AU (1) | AU2001246668A1 (fr) |
BR (1) | BR0109858A (fr) |
CA (1) | CA2404955C (fr) |
DE (1) | DE60132572T2 (fr) |
DK (1) | DK1274519T3 (fr) |
ES (1) | ES2296741T3 (fr) |
FR (1) | FR2807347B1 (fr) |
IL (2) | IL150792A0 (fr) |
NO (1) | NO325993B1 (fr) |
PT (1) | PT1274519E (fr) |
WO (1) | WO2001076775A1 (fr) |
Families Citing this family (5)
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)
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 |
-
2000
- 2000-04-07 FR FR0004443A patent/FR2807347B1/fr not_active Expired - Fee Related
-
2001
- 2001-04-02 IL IL15079201A patent/IL150792A0/xx active IP Right Grant
- 2001-04-02 WO PCT/FR2001/000971 patent/WO2001076775A1/fr active IP Right Grant
- 2001-04-02 CA CA002404955A patent/CA2404955C/fr not_active Expired - Fee Related
- 2001-04-02 BR BR0109858-6A patent/BR0109858A/pt not_active IP Right Cessation
- 2001-04-02 ES ES01919606T patent/ES2296741T3/es not_active Expired - Lifetime
- 2001-04-02 DE DE60132572T patent/DE60132572T2/de not_active Expired - Fee Related
- 2001-04-02 US US10/220,634 patent/US6811034B2/en not_active Expired - Fee Related
- 2001-04-02 JP JP2001574283A patent/JP2003531719A/ja active Pending
- 2001-04-02 CN CNB018054935A patent/CN1196543C/zh not_active Expired - Fee Related
- 2001-04-02 EP EP01919606A patent/EP1274519B1/fr not_active Expired - Lifetime
- 2001-04-02 PT PT01919606T patent/PT1274519E/pt unknown
- 2001-04-02 AU AU2001246668A patent/AU2001246668A1/en not_active Abandoned
- 2001-04-02 DK DK01919606T patent/DK1274519T3/da active
- 2001-04-02 AT AT01919606T patent/ATE384590T1/de not_active IP Right Cessation
-
2002
- 2002-07-17 IL IL150792A patent/IL150792A/en not_active IP Right Cessation
- 2002-10-07 NO NO20024842A patent/NO325993B1/no not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0176775A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1274519B1 (fr) | 2008-01-23 |
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 (fr) | 2008-04-01 |
BR0109858A (pt) | 2003-06-03 |
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 (fr) | 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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