At present, inthe warehousing management, as the types of materials continue to increase, themanagement of warehousing becomes more and more complicated, which brings greattroubles in management and increases the operating costs of management. Atpresent, the complexity and diversity of warehouse management has made thetraditional operation mode of relying on manual and paper counting recordscompletely incapable of such a huge work.
The wide application of Bluetooth technology provides a low-cost, stable andreliable solution for warehouse positioning. After the launch of the newgeneration Bluetooth 4.0 standard, it has better characteristics in terms ofcommunication distance, stability and response speed. The feasibility andpracticability of Bluetooth technology in storage location management.
The Bluetooth positioning system is mainly composed of a signal transmittingnode and a receiving processing center. The beacon is identified by a uniquenumber of the protocol stack. The main function is location identification andcalculation. The receiving processing center is a mobile phone, including areceiver and a processing terminal. The receiver is The mobile phone has abuilt-in Bluetooth module for searching the Bluetooth beacon and determiningthe beacon UUID identifier; the processing terminal completes the processing ofthe RSSI value to obtain the distance information and the coordinateestimation.
The beacon node is an important component of the indoor positioning system. Thedeployment method affects the signal acquisition, distance measurement anddeployment density, which in turn affects the actual positioning method,accuracy and cost. Under the condition of no occlusion, the Bluetooth beaconhas a decreasing trend in the signal within a certain distance, so a moreaccurate position estimation can be obtained within the effective decrementingdistance.
Therefore, in the application of the storage scenario, the Bluetooth beaconshould be placed on the top of the shelf, and the beacon signal can have alarger signal coverage radius. At the same time, due to the workingcharacteristics of the beacon, the long-term placement in a fixed position isin a broadcast working state, and the power supply can only be powered by abattery, so the power consumption problem of the Bluetooth beacon isparticularly important. As far as its Bluetooth broadcast is concerned, itsworking mode is usually a periodic gap broadcast. The instantaneous current ofthe broadcast transmission can reach several milliamps, and the sleep currentcan be as low as several microamps.
The low-power BLE transparent transmission module introduced by Chengdu Ebyte Electronicsadopts Dialog's DA14580 classic solution, which has excellent low-powercharacteristics, emission current of 3.4 mA, sleep current of 3 μA, and 1second period of broadcast average current. As low as 15 microamps, it is idealfor low-power environments where Bluetooth beacons are used.