A Logistics Internet of Things Positioning and Calibration System

Abstract

The invention discloses a positioning and calibration system for the Internet of Logistics and Things, which includes a filter receiving module and a frequency multiplication comparison module. , the frequency doubling comparison module uses diode D1 and diode D2 to form a limiting circuit to limit the signal, and then uses inductance L2, capacitor C4, capacitor C5, inductance L3, and capacitor C3 to form a frequency doubling circuit to amplify the signal frequency, and uses op amp AR2 It forms a noise reduction circuit with capacitor C7 to reduce the signal-to-noise ratio, and uses the decoupling properties of the capacitor to filter out signal noise. At the same time, the voltage +3.3V provides the base potential for the inverting input terminal of the operational amplifier AR2, and the operational amplifier AR2 adjusts the signal through the differential At the same time, the triode Q2 is used as a PNP triode, which is turned on at a low level, and the power supply +5V compensates the function of the non-inverting input of the op amp AR4, which realizes the function of frequency multiplication and voltage stabilization, and reduces the reflection of mountains surrounded by terrain or rain and snow. The influence of the moisture in.

Description

technical field [0001] The invention relates to the technical field of positioning and calibration, in particular to a positioning and calibration system for the logistics Internet of Things. Background technique [0002] The Internet of Things is an information carrier such as the Internet and traditional telecommunication networks. It enables all ordinary objects that can perform independent functions to realize an interconnected network and realize the connection between things and things. Logistics information reflects knowledge, data, images, The general term for data and documents, logistics standardization refers to the formulation of technical standards for internal facilities, mechanical equipment, special tools, etc., packaging, warehousing, loading and unloading, transportation, etc., with logistics as a large system, and as a prominent feature of modern logistics. Logistics information standards, and form a national and international standardization system, the e...

AI Technical Summary

Problems solved by technology

[0003] The main key of the logistics Internet of Things is the real-time positioning of the parcel. During the long-distance operation of the parcel at multiple transfer stations, it will encounter terrain surrounded by mountains, rain and snow, and severe weather. Resonance, or moisture in rainy and snowy weather will affect the transmission of the signal, resulting in serious attenuation of the positioning signal, unable to locate the package information in time, and affecting the operation of the logistics IoT positioning system

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