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Browse Prior Art Database

THE SERIAL NOTCH AUTOMATIC IDENTIFICATION SYSTEM

IP.com Disclosure Number: IPCOM000006934D
Original Publication Date: 1993-Jun-01
Included in the Prior Art Database: 2002-Feb-11
Document File: 2 page(s) / 91K

Publishing Venue

Motorola

Related People

Steve Hershey: AUTHOR

Abstract

Automatic Identification is the process of automati- cally associating a uoique identification code with a part. This is most often done by detecting a feature inscribed in the part or reading a tag attached to the part. Although barcode-label based automatic identitication systems are the most common, these systems often suffer from unacceptably high error rates and are ditlicult to suc- cessfully apply when the part is subjected to harsh envi- ronments. The new automatic identification system presented in this paper is an alternative to barcode-based systems.

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MOTOROLA INC. Technical Developments Volume 19 June 1993

THE SERIAL NOTCH AUTOMATIC IDENTIFICATION SYSTEM

by Steve Hershey

lNTRODlJCTlON

  Automatic Identification is the process of automati- cally associating a uoique identification code with a part. This is most often done by detecting a feature inscribed in the part or reading a tag attached to the part. Although barcode-label based automatic identitication systems are the most common, these systems often suffer from unacceptably high error rates and are ditlicult to suc- cessfully apply when the part is subjected to harsh envi- ronments. The new automatic identification system presented in this paper is an alternative to barcode-based systems.

PRINCIPLE OF OPERATION

  Fiie 1 shows an overview of the Serial Notch Auto- matic Identification System. A series of notches ofvary- ing depths are inscribed in the part. The notches encode an identification number which uniquely identifies the part. The notches do not have to be rectangular-many other shapes are also possible, such as circular, square, or elliptical. As the part moves through the reader, the analog displacement sensor provides a voltage propor- tional to the depth of each notch. After all notches have been read, the notch depths are turned into the bit pat- tern which represents the pari identification number.

Voltage proportional

Notches ot varylng depths on part

1 Direction of Motion -

Figure 1. Serial Notch System Overview

B Motorola, Inc. ,993 81

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MOTOROLA INC. Technical Developments Volume 19 June 1993

  Figure 2 provides two examples of Serial Notch diKerent notch depths. The designer must select the num- encoding. In example A, there are only two possible her of bits per notch so that the identiticat...