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Intelligont RF device and method of reading data

A technology of an intelligent device and a radio frequency device, which is applied to the problem of reading the memory record carrier, the alarm of electric action, and the alarm of moving hand-held items, etc., which can solve the problems of increasing the cost of labels and other issues

Inactive Publication Date: 2004-08-11
CHECKPOINT SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires detection circuits and batteries to be installed in the tag, which will increase the cost of the tag

Method used

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  • Intelligont RF device and method of reading data
  • Intelligont RF device and method of reading data
  • Intelligont RF device and method of reading data

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Embodiment Construction

[0028] Some specific terms are used hereinafter for convenience only and not for limitation. The words "top," "bottom," "downward," and "upward" indicate directions in the drawings to which reference is made. The terminology used includes the words specifically introduced above, words derived from them and other similar words.

[0029] The present invention relates to a method for reading multiple RFID tags or smart devices simultaneously. The method is implemented using tags which continuously transmit their respective identification information as long as they are within the interrogation zone. After each transmission of data, there is a waiting period or pause of a fixed length of time. The waiting period is preferably more than ten times the data transmission period. When the label is made, the circuit components of each label have a specified manufacturing tolerance, so that although the length of the intermittent period is fixed for each label, the length of the inter...

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Abstract

A method of reading multiple RFID tags (10) located in a field of an interrogating antenna (26) is based on periodic transmissions from the tags with large, non-transmission intervals between transmissions. The non-transmission intervals are fixed for a given tag, but are random between tags, preferably due to manufacturing tolerances in electrical components from which the tag is constructed, such that no coordination of transmissions from the interrogating antenna is required.

Description

technical field [0001] The invention relates to an intelligent radio frequency device and a method for reading data therefrom. Background technique [0002] It has long been known to tag goods for identification and / or to deter theft. For example, many commodities are identified by a barcode that has encoded information that can be read by passing the barcode through the field of view of a scanner. Many items also have a resonant tag to deter theft. Recently some passive resonant security tags have been developed which return a unique or semi-unique identification code. These security tags usually have an integrated circuit that stores an identification code. This "smart" security tag can provide information about the item to which it is attached, and it can be detected within the range of the interrogator. Such tags are needed because they can be quickly interrogated from a distance. Three examples of smart tags are disclosed in US Pat. Nos. 5,446,447 (Carney et al.), ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/00G08B13/24
CPCG08B13/2431G06K7/0008G06K7/10059G08B13/2417G08B13/2485G08B13/14
Inventor 约翰·H·鲍尔斯约翰·纳尔逊·戴格尔拉德·彼得罗维奇
Owner CHECKPOINT SYST INC