Linear metal bar code label detection sub-optimal receiver based on eddy current detection technology

Abstract

The invention provides a linear metal bar code label detection sub-optimal receiver based on an eddy current detection technology. The form of a linear metal bar code label belongs to a unipolar return-to-zero code; sub-optimality refers to receiving criteria induced by introducing average inter-symbol interference estimation on the basis of an additive white Gaussian noise probability density function according to optimal receiving criteria. Firstly, impedance calculation based on reduction of an operating distance of a dyadic green function is given and the complexity is reduced to O(1) at maximum; meanwhile, the inter-symbol interference is additive. Then sub-optimal receiving criteria are given and the corresponding receiver, which is similar with a related receiver structure, is given. According to the linear metal bar code label detection sub-optimal receiver provided by the invention, the linear metal bar code label is detected by utilizing the sub-optimal receiving criteria under an additive inter-symbol interference condition; a metal bar code in an acting range is treated through calculating an eddy current acting range, so that the calculation amount of reading coil resistance changes in the a linear metal bar code label by utilizing eddy current detection is reduced and the linear metal bar code label detection sub-optimal receiver has relatively high application value.

Description

technical field [0001] The invention belongs to the field of Internet of Things perception technology, and in particular relates to a linear metal bar code label detection suboptimal receiver technology based on eddy current detection technology for linear metal bar code label detection. Background technique [0002] The perception and collection of item information is an important part of the Internet of Things system. At present, several major item identification technologies (barcode, RFID, magnetic stripe) have problems such as easy damage and high relative price. Moreover, these information recording technologies are only suitable for short-term use occasions such as article production, storage and circulation, and cannot be used for a long time in the open air, underground, and outdoors in humid, large temperature differences, and polluted environments. [0003] Existing long-term item information records, such as motor, engine nameplates, gas-liquid storage tank label...

AI Technical Summary

Problems solved by technology

[0002] The perception and collection of item information is an important part of the Internet of Things system. At present, several major item identification technologies (barcode, RFID, and magnetic stripe) have problems such as easy damage and relatively high prices.

Moreover, these information recording technologies are only suitable for short-term use occasions such as the production, storage, and circulation of items, and cannot be used for a long time in open air, underground, and outdoor environments such as humidity, large temperature differences, and pollution.

[0003] Existing item information records that have been used for a long time, such as motor, engine nameplate, gas and liquid storage tank labels and other item information records, use words or letters to engrave on the metal surface of the item, the amount of information is small, and it cannot be automatically identified

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