1, the meaning of different: radio frequency identification RFID is a kind of manipulation is simple, applicable to the automatic control field of technology, it uses the inductance and electromagnetic coupling transmission characteristics, realize to be identified object automatic diagnosis. RFID positioning system is usually composed by the electronic tags, radio frequency read-write and computer database structure. According to whether the tag is active or not, it can be divided into active RFID and passive RFID.
UWB positioning system usually includes UWB positioning base station, UWB positioning tags and positioning engine.UWB positioning technology transmits data by sending ultra-narrow pulses in nanoseconds and below, and it can obtain GHz-level data bandwidth, low transmit power, and no carrier wave.
2, focusing on different: active RFID tags contain batteries, so the signal transmission range is larger compared to passive RFID, to more than 30 meters. At the same time can realize the fingerprint positioning based on RSSI measurement.
The passive RFID system relies only on inductive coupling, so there is no battery. Compared to active RFID, it is smaller, more durable and less costly. Passive RFID positioning systems mostly use proximity detection method to achieve positioning.
The main advantages of UWB positioning technology are low power consumption, channel fading (such as multipath, non-line-of-sight and other channels) is not sensitive to interference, anti-jamming ability, will not interfere with other equipment in the same environment, strong penetration (can be in the environment to penetrate a brick wall for localization), indoors or in the building more dense occasions can be obtained a good positioning effect.
At the same time in the distance measurement, positioning, tracking can also achieve higher accuracy, can be applied to stationary or moving objects and human positioning tracking.
3, summary: UWB positioning technology than RFID positioning technology, has a higher accuracy, more suitable for positioning accuracy requirements of the industry, such as chemical personnel positioning, coal mining personnel positioning, power energy personnel positioning, manufacturing personnel positioning, public security and judicial personnel positioning, tunnel personnel positioning.
Expanded Information:
UWB technology has the advantages of low system complexity, low power spectral density of transmitted signals, insensitivity to channel fading, low interception capability, and high localization accuracy, and is especially suitable for high-speed wireless access in dense multipath places such as indoor areas.
UWB technology is a wireless carrier communication technology that uses a frequency bandwidth of more than 1GHz. Instead of using a sinusoidal carrier, it utilizes nanosecond non-sinusoidal narrow pulses to transmit data, so it occupies a large spectral range, and despite the use of wireless communication, its data transmission rate can reach more than several hundred megabits per second.
Using UWB technology can transmit signals over a very wide bandwidth, and the U.S. Federal Communications Commission (FCC) has stipulated that UWB technology should occupy a bandwidth of more than 500 MHz in the 3.1 to 10.6 GHz band.
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