* Question
| What are the classifications of labels by energy source classification? |
* Answer
| 1 Active tag active tags are also known as active tags.Because the energy of the active tag does not come from the electromagnetic waves sent by the reader, but depends on the battery that it carries.Therefore, the active tag can actively send data to the reader, and the life of the tag is limited by the battery capacity.Active tags can reach working distances of tens of meters or even hundreds of meters.Due to the long communication distance of active tags, the relatively complex functions, and the storage capacity are generally much larger than passive tags, the price of active tags is much higher than that of passive tags.Active tags can be used for the management of valuable assets.Active tags can enhance the ability to withstand interference from the surrounding environment by broadcasting very strong signals, especially when the distance between the tag and the reader is relatively long.Since the energy of active tag operation comes from the battery, the battery needs a certain amount of space, so the size of the active tag is generally larger than the size of the passive tag.
The wake-up active tag is in an inactive state, ie, sleep state, most of the time.When the tag receives an activation command from the reader, it will be woken up.In the sleep state, the energy consumption of the tag is very low, thereby extending the life of the tag battery.Compared to waking up active tags, this tag has a much smaller data transfer rate and storage space.Tags reduce battery energy consumption by limiting the data transfer rate.Such tags are widely used due to their low construction cost.Since the energy obtained is very limited, passive tags have much smaller communication distances than active tags. Usually, passive tags have a communication distance of only a few meters and the amount of data that can be transmitted is limited. Passive tags are mostly used in item statistics, transportation, tracking, and other medical and anti-theft areas.Passive tags and active tags can be combined to complement each other.In the solution of asset supply chain management, the use of passive tags can reduce costs in scenarios where the movement of items is less variable and the security, perception, and storage requirements are not high.However, these batteries are just an auxiliary source of energy.Similar to passive tags, semi-passive tags absorb energy from the carrier signal transmitted by the reader to wake up the chip and transfer the data to the reader.The auxiliary battery provides operating energy when the energy absorbed by the tag is insufficient to maintain its operating voltage. |
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