Motion sensor calibration method, system, device and medium for smart refrigerator

Abstract

The present invention provides a motion sensor calibration method, system, device and medium for smart refrigerators, including: acquiring motion sensing information collected by the motion sensor, judging whether the refrigerator door is is in motion and when it is determined that the refrigerator door is in motion, acquire the angle sensing information collected by the gyroscope and the first magnetic field sensing information collected by the magnetometer, and and the first magnetic field sensing information, establish the corresponding magnetic field angle information mapping table of the first magnetic field sensing information and the angle sensing information; The first magnetic field sensing information corresponding to the sensing information is updated. In the present invention, the influence of large objects around the refrigerator on the readings of the magnetometer in the motion sensor and the problems of excessively large errors of long-time integration of the gyroscope can be avoided.

Description

technical field [0001] The present invention relates to sensor calibration, in particular to a motion sensor calibration method, system, device and medium for smart refrigerators. Background technique [0002] In the mall, there are many refrigerators for selling commodities, which are used for automatic vending of commodities, such as beverages. In order to increase the sales volume of commodities, many suppliers place refrigerators in many shopping malls to sell commodities, for example, Coca-Cola's refrigerators selling Coke can be seen in many shopping malls. [0003] When it is necessary to track the product placement and product sales of each refrigerator, it is necessary to pay a huge labor cost, and it is necessary to send personnel to each refrigerator for data collection. However, the sales status of the commodities in the refrigerator is changing at any time. When the products with better sales are sold out, there is no replenishment of the commodities, which wil...

AI Technical Summary

Problems solved by technology

In the terminal data acquisition device, the motion sensor is used to judge the opening of the refrigerator door. Since refrigerators are generally placed indoors, the magnetic field of indoor objects may affect the earth’s magnetic field, and there will also be cases when the refrigerator is moved or other large metal objects are moved in. An issue that causes changes in the magnetic field around the motion sensor

Therefore, the traditional method of rotating the magnetometer in the motion sensor for one revolution is not suitable for this application scenario, and a new calibration method for the magnetometer is needed

Images