Product Overview

WE-RN01 network reader can be installed with two reading antennas, and the distance of detecting tags can be up to 100 meters in the open. The reader not only can read the ID value of the electronic label, but also can calculate the actual distance of the label by measuring the wireless signal field strength of the electronic label. A number of readers work together, you can determine the effective range of the specific location of the electronic tags, to achieve real-time monitoring of the location of personnel, goods, convenient personnel, goods tracking and finding.

The RS485 interface of WE-RN01 network reader can access 32 RS485 readers, together with the 2 reading antennas of the device itself, a total of 34 positioning base stations can be deployed in one network reader, which can cover an area or a floor, and easily realize the monitoring and positioning of the tags in the whole area.

Application Areas

Tag positioning is widely used in many applications such as intelligent warehouse management, logistics tracking, indoor navigation, and people management.

Distance measurement formula

This product calculates the distance between the electronic tag and the antenna by measuring the wireless signal field strength of the tag, and the distance and the wireless signal strength are in an exponential curve relationship as follows:

Due to chart size limitations, only correspondences within a distance of 7 meters are shown

In the above graph, there are 3 values that we need to measure repeatedly to calibrate.
1. L0: The signal strength when the distance between the tag and the reader is 0 cm, the measured value is -8dBm.
2.L1: Signal strength when the distance between the tag and the reader is 40cm, measured value is -20dBm.
3.L2: Signal strength when the distance between the tag and the reader is 100cm, measured value is -30dBm.
Based on these three values, the derived formula is as follows: