EP0975441A1 - Dispositif et procede pour mesurer la rigidite de colis plats - Google Patents

Dispositif et procede pour mesurer la rigidite de colis plats

Info

Publication number
EP0975441A1
EP0975441A1 EP96945363A EP96945363A EP0975441A1 EP 0975441 A1 EP0975441 A1 EP 0975441A1 EP 96945363 A EP96945363 A EP 96945363A EP 96945363 A EP96945363 A EP 96945363A EP 0975441 A1 EP0975441 A1 EP 0975441A1
Authority
EP
European Patent Office
Prior art keywords
stiffness
thickness
sensors
rigidity
values
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
Application number
EP96945363A
Other languages
German (de)
English (en)
Other versions
EP0975441B1 (fr
Inventor
Jürgen REISIG
Christel Gehl
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0975441A1 publication Critical patent/EP0975441A1/fr
Application granted granted Critical
Publication of EP0975441B1 publication Critical patent/EP0975441B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B07C1/00—Measures preceding sorting according to destination
    • B07C1/10—Sorting according to size or flexibility
    • B07C1/16—Sorting according to thickness or stiffness

Definitions

  • the invention relates to a device and a method for measuring the stiffness of flat mail items in accordance with the preamble of the independent patent claims
  • stiffness and thickness measurements For the processing of letters, postcards and similar flat mail items in automatic mail distribution systems, it is necessary to carry out stiffness and thickness measurements on all mail items, since these distribution systems can only properly process mail items that have certain predetermined parameters. Such measurements can in principle be carried out mechanically by lifting ! with Fuhlrolie and inductive sensor However, undesirable vibrations occur at high transport speeds, e.g. greater than 2.9 m / s, so that stiffness and thickness cannot be determined exactly and separately with this functional principle. A mechanical stiffness measurement also requires a large amount of space and, like all mechanical devices, is subject to increased wear. The above applies in particular to unevenly thick or rigid objects
  • the procedure according to the invention has the advantage of a smaller space requirement, less wear and a higher accuracy.
  • the precise measurement of unevenly thick and rigid objects is also possible
  • FIG. 1 shows a schematic diagram of a device according to the invention from above
  • Fig. 1 shows a schematic diagram of a device according to the invention from above, i. H. perpendicular to the surface of the flat items.
  • Conveyor belts 2 are guided over a number of rollers 1, so that a transport path 10 is formed.
  • the conveyor belts 2 are designed as cover strips, between which the mail items are held in a force-locking manner.
  • the transport route has at least one curved section 11 and at least one straight section 12.
  • a stiffness sensor 3 is arranged in the area of the curved section, and a thickness sensor 4 is arranged in the area of the straight section.
  • the flat shipments are transported in the direction of arrow in the transport route 10.
  • the conveyor belts are elastic and adapt to the thickness of the shipment.
  • the stiffness of a flat consignment causes an additional deflection of the outer bands during transport, in particular in the vicinity of the front and rear edges of the consignment.
  • On the straight section of the transport route there is only a change in the thickness of the conveyor belt-shipment system according to the thickness of the shipment.
  • Two thickness sensors 4 arranged one above the other measure the current thickness of the system of conveyor belts - flat mailpiece substantially perpendicular to the direction of transport of the mailpiece.
  • a laser, infrared or ultrasound scanning sensor is provided as the thickness sensor.
  • the change in the distance s is preferably measured by means of interference.
  • laser scanning sensors are preferred.
  • a laser, infrared or ultrasound scanning sensor is also used as the stiffness sensor 3, which detects the change in distance due to the stiffness of the flat mail items. Thickness and stiffness sensors for determining the stiffness of the mail item passing through are connected to an evaluation device 15, the functioning of which is described in detail below.
  • a plurality of thickness or stiffness sensors are preferably arranged one above the other, which enable the shipment to be assessed over the entire shipment height.
  • the thickness DZW is preferably measured. the rigidity due to sensor pairs on the same hone of the consignments.
  • An arrangement of the stiffness and thickness sensor in the area of the lower edge of the mail items is preferred. This means that deposits such as B key, can be recognized.
  • the stiffness sensors in the curved area 11 are preferably arranged such that the deflection of the outer conveyor belts in the area between a first and a second deflecting roller 13, 14 can be avoided.
  • a measure for the stiffness of a mail item that is guided past the thickness and stiffness sensors is determined in the following manner by the evaluation device 15.
  • FIG. 3 shows the time course of the output signals from thickness or stiffness sensors (a or b) in a time window for a flat mail item with permissible stiffness and thickness. It can be seen in FIG. 3 that an increase in thickness (curve a) and an increased deflection (curve b) were measured centered around the time of -34.8 ms in the time window.
  • FIG. 4 shows measured values corresponding to FIG. 3 for a letter with a permissible thickness and excessive rigidity.
  • the values measured by the thickness sensor are added up within a predetermined time window ⁇ t1. Also from that Stiffness sensor measured values added up within a predetermined time window ⁇ t2.
  • the two time windows ⁇ t1 and ⁇ t2 are preferably chosen to be of equal size. Then the difference is formed between the sum of the stiffness values and the sum of the thickness values. This difference is used as a measure of the stiffness measurement. Compared to a method in which only the extreme values are used, the probability of misinterpretation is much lower. In addition, this procedure also provides clear results for borderline cases.
  • Curve b1 corresponds to the measured values of a sensor arranged in the area of the lower letter edge; curve b2 ⁇ en values of a stiffness sensor arranged in the middle area. Curve b1 clearly shows maxima which indicate the increased stiffness due to the insert, while curve b2 does not have such maxima. Accordingly, in a preferred embodiment of the invention, a number of sensors for measuring stiffness and thickness are arranged essentially over the entire height of the conveyor belts.
  • the maximum difference between the summed values is determined for a number of pairs of thickness and rigidity sensors and the maximum is used as a measure of the rigidity.

Landscapes

  • Controlling Sheets Or Webs (AREA)
  • Sorting Of Articles (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

Un détecteur d'épaisseur (4) est disposé dans la région d'un tronçon droit (12) de la section de transport de colis, et un détecteur de rigidité (3) est placé dans la région d'un tronçon curviligne (11) et sert à mesurer la déflection de bandes transporteuses souples (2). Un dispositif d'évaluation (15) détermine la rigidité du colis en défilement à partir des valeurs des détecteurs d'épaisseur et de rigidité (4, 3).
EP96945363A 1996-01-05 1996-12-20 Dispositif et procede pour mesurer la rigidite de colis plats Expired - Lifetime EP0975441B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19600231 1996-01-05
DE19600231A DE19600231C2 (de) 1996-01-05 1996-01-05 Vorrichtung und Verfahren zur Steifigkeitsmessung von flachen Sendungen
PCT/EP1996/005762 WO1997025162A1 (fr) 1996-01-05 1996-12-20 Dispositif et procede pour mesurer la rigidite de colis plats

Publications (2)

Publication Number Publication Date
EP0975441A1 true EP0975441A1 (fr) 2000-02-02
EP0975441B1 EP0975441B1 (fr) 2004-03-10

Family

ID=7782191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96945363A Expired - Lifetime EP0975441B1 (fr) 1996-01-05 1996-12-20 Dispositif et procede pour mesurer la rigidite de colis plats

Country Status (5)

Country Link
US (1) US6032517A (fr)
EP (1) EP0975441B1 (fr)
JP (1) JP3923084B2 (fr)
DE (2) DE19600231C2 (fr)
WO (1) WO1997025162A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6585344B2 (en) * 2001-03-22 2003-07-01 Hewlett-Packard Development Company, L.P. Systems and methods for automatically detecting a number of remaining sheets of print media
DE10141375C1 (de) 2001-08-23 2003-03-13 Siemens Dematic Ag Vorrichtung zum Trennen von Sendungen in Dickenklassen
DE10210436A1 (de) * 2002-03-09 2003-10-02 Michael Licht Verfahren und Vorrichtung zur zerstörungsfreien spektroskopischen Bestimmung von Analytkonzentrationen
US7096743B2 (en) 2002-09-27 2006-08-29 Siemens Aktiengesellschaft Device for measuring the bending strength of flat consignments
US7315007B2 (en) * 2003-06-09 2008-01-01 Siemens Dematic Corp. Method and apparatus for stiffness and thickness detection in mail sorting systems
FR2909360B1 (fr) 2006-11-30 2010-01-15 Mag Systemes Procede et dispositif de determination du degre de remplissage d'un contenant en enveloppes pleines
US9440264B2 (en) 2007-04-13 2016-09-13 Siemens Industry, Inc. Method and system for weighing mail pieces
US8283588B2 (en) * 2007-04-13 2012-10-09 Siemens Industry, Inc. Method and system for sorting postal mail
US7669470B2 (en) * 2007-07-09 2010-03-02 Siemens Industry, Inc. Mail piece stiffness detector
DE102007034070B3 (de) * 2007-07-20 2008-11-20 Siemens Ag Vorrichtung und Verfahren zum Erkennen von zu biegsamen Gegenständen
DE102007034853A1 (de) * 2007-07-24 2009-02-05 Jpk Instruments Ag Verfahren und Vorrichtung zur verbesserten mikrofluidischen Versorgung von Proben und Messeinrichtung
DE102008005449B3 (de) * 2008-01-22 2009-04-30 Outotec Oyj Verfahren und Vorrichtung zum Überwachen der Funktionsfähigkeit eines Wanderrostes
JP5117211B2 (ja) 2008-02-05 2013-01-16 株式会社リコー 画像形成装置
DE102008035072A1 (de) 2008-07-28 2010-02-25 Siemens Aktiengesellschaft Vorrichtung zum Ausschleusen eines flachen Gegenstands
US9330405B2 (en) * 2013-03-08 2016-05-03 Ncr Corporation Methods and apparatus for fast item identification
FR3054036B1 (fr) 2016-07-12 2018-07-13 Solystic Dispositif pour mesurer la rigidite d'articles de courrier

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4360108A (en) * 1981-01-05 1982-11-23 Joule' Technical Corporation Method and apparatus for checking letter thickness
US4398421A (en) * 1981-12-23 1983-08-16 Hartford Steam Boiler Inspection And Insurance Company Ultrasonic thickness measuring apparatus and method
NL181338C (nl) * 1983-06-13 1987-08-03 Nederlanden Staat Controle-inrichting voor het onderzoeken van brieven.
DK155274C (da) * 1986-05-30 1989-07-31 Stormax Int As Apparat til kontrol af traeemne
US5147169A (en) * 1989-12-29 1992-09-15 Agissar Corporation Automated envelope handling system
GB9017420D0 (en) * 1990-08-08 1990-09-19 Ncr Co Apparatus for assessing the stiffness of a sheet
DE4216146C1 (de) * 1992-05-15 1993-12-02 Licentia Gmbh Verfahren und Vorrichtung zur berührungslosen Dickenmessung von flachen, durchlaufenden Gegenständen
GB9217568D0 (en) * 1992-08-19 1992-09-30 The Technology Partnership Ltd Device and method for detecting residual content of emptied envelopes
FR2729310A1 (fr) * 1995-01-12 1996-07-19 Alcatel Postal Automation Syst Dispositif pour detecter la presence d'un objet dur dans un pli de courrier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9725162A1 *

Also Published As

Publication number Publication date
WO1997025162A1 (fr) 1997-07-17
JP3923084B2 (ja) 2007-05-30
DE19600231C2 (de) 1998-02-19
DE19600231A1 (de) 1997-07-17
EP0975441B1 (fr) 2004-03-10
US6032517A (en) 2000-03-07
DE59610934D1 (de) 2004-04-15
JP2000502609A (ja) 2000-03-07

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