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Some Basic Categories Of PDA

    Industrial-grade PDA includes bar code scanner, RFID reader and so on. Industrial PDA is characterized by strong, durable, can be used in many places more harsh places, while the characteristics of industrial use for a lot of optimization. Catchwell CW30 Industrial PDA can support both RFID read and write and bar code scanning capabilities, along with IP54 industrial level, which is not available in consumer handheld terminals. Barcode scanners, also known as bar code readers, barcode scanning guns, bar code scanners, barcode scanning guns and bar code readers. It is used to read the bar code contains information reading device, the use of optical principles, the contents of the bar code after decoding through the data line or wireless transmission to the computer or other equipment. Widely used in supermarkets, logistics courier, library and other scanning products, documents bar code.PDA

    Barcode scanners are often referred to as barcode scanner / reader, which is used to read the information contained in the bar code, which can be divided into one-dimensional, two-dimensional bar code scanners. Barcode scanner structure is usually the following parts: light source, receiving device, photoelectric conversion components, decoding circuit, computer interface. The basic working principle of the scanning gun is that the light emitted by the light source is irradiated onto the bar code symbol through the optical system, and the reflected light is imaged on the photoelectric converter through the optical system. The decoder interprets the digital signal which the computer can directly accept The In addition to one or two-dimensional bar code scanner classification, can also be classified as: CCD, full-angle laser and laser handheld bar code scanner.PDA

    RFID (Radio Frequency IDentification) technology, also known as electronic tags, radio frequency identification, is a communication technology, through radio signals to identify specific targets and read and write relevant data, without identifying the system and the specific target between the establishment of machinery Or optical contact.PDA  Commonly used low frequency (125k ~ 134.2K), high frequency (13.56Mhz), ultra-high frequency, passive and other technologies. RFID reader is also mobile and fixed, RFID technology is widely used, such as: library, access control systems, food safety traceability and so on. UHF PDA is used to read RFID tags, in reading high-frequency tags have a great advantage. UHF electronic tags in reading and writing distance has a great advantage. UHF radio frequency tags (902MHz ~ 928MHz) Accordance with the standard: EPC C1G2 (ISO 18000-6C) Available data area: 240 EPC code, tag identifier (UHF and UHF frequency) RFID frequency of the general use of electromagnetic radiation Principle: UHF (902MHz ~ 928MHz) : (TID) 64-bit operating mode: can read and write