Smart refrigerator motion sensor calibration method, system and device and medium

Abstract

The invention provides a smart refrigerator motion sensor calibration method, system and device and a medium. The method comprises the steps that motion sensing information is collected by a motion sensor; whether a refrigerator door is moving is judged based on the motion sensing information; if the refrigerator door is moving, a gyroscope collects angle sensing information, and a magnetometer collects first magnetic field sensing information; according to the angle sensing information and the first magnetic field sensing information, a magnetic field angle information mapping table corresponding to the first magnetic field sensing information and the angle sensing information is established; the door is repeatedly opened and closed; and the first magnetic field sensing information corresponding to each piece of angle sensing information in the magnetic field angle information mapping table is updated. According to the invention, the influence of a large object around a refrigerator on the reading of the magnetometer in the motion sensor and excessive error of long-time and multiple 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

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