According to the internal structure of RFID tags, they are divided into active tags with battery (Tony Note: Also called active tags) and passive tags without battery (Tony Note: Also called passive tags) these two types. The Pass
Antennas are rectangular, circular, and rod-shaped. Generally, the longer the communication distance is, the larger the size of the antenna. However, in actual use, when tags are attached to an item, even the RFID tags of the business card size are too large. In fact, the size and shape of the RFID tag in use need to b
× Winding Process
It is a process that combines an antenna and an IC loop to form a module. It takes some time to mount modules one by one on a thin board. Therefore, high costs are not suitable for mass production. However, compared with other manufacturing processes, the tag communication distance is improved.
× Etching ProcessIt is a process of forming an antenna by etching aluminum or copper film on the pet Film Board. Figure 4 shows an item (using an etching antenna in an IC circuit). B
For an RFID system, the concept of Frequency Band refers Frequency Range of tag signals sent, received, and read by the reader through an antenna . In terms of application concept, the operating frequency of the RF tag, that is, the operating frequency of the RFID system, directly determines all aspects of the system application. In an RFID system, the system wor
know which brand the chip is produced by which model of the chip.The following list of various manufacturers of chip models of the coding table, for your reference:6C Series: Based on the first few of the TID to determine the chipAlien and Impinj's Tid 21h,nxp G2 series of Tid have 16h/24hE2003411Alien H2E2003412Alien H3 (96-480 bit EPC)E2006001UCODE EPC G2 (224bit user memory, 96bit EPC)E2006003G2XM (512bit user memory,96-240bit EPC)E2006004G2XL (NO user memory,96-240bit EPC)E2006806G2il (NO u
The Passive Tag does not generate electricity itself, but uses the radio waves sent by the reader as the power of the IC circuit. This is divided into two types: the induction mode and the electric wave mode (Figure 3 ).
Electromagnetic Induction: receives the time-varying magnetic field from the reader through a ring antenna to provide power to the IC circuit. This is the same principle as a turbine generator (Tony Note: How is a turbine generator working? ).
Radio waves: In order to effect
With the popularization of RFID applications, more and more software engineers need to use RFID reader programming to achieve their own needs. In order to make the software engineer understand the use of RFID reader faster, this paper chooses a commonly used USB drive-free RFID
images is that they do not need to be transferred wirelessly from the user's iphone to the watch. When you specify a name for the image, WatchKit only sends a string of names to your watch app, which reduces time and power consumption. This string is used to retrieve the image in the Watch app package, or from the image cache.Any time you create an __uiimage__ object in your extension, you must first send an image object that exists on the user's iphone to the Apple Watch before it can be used.
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Dom Method:1, createelementSyntax: document.createelement (nodeName)For example: Document.createelement ("P"); A P element is created;2, AppendChildSyntax: Parent.appendchild (Child)3, CreattextnodeSyntax: document.createTextNode (text)Example.js/*window.onload = function () {var para = document.createelement ("P"); var testdiv = document.getElementById ("Testdiv"); Testdiv.appendchild (para); var txt = document.createtextnode ("Hello World"); Para.appendchild (TXT); Note that there is
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