Standard weight block correction method for weight sensing system of unmanned vending cabinet

Abstract

The invention discloses a standard weight block correction method for a weight sensing system of an unmanned vending cabinet. The method comprises a correction factor acquisition stage and an actual target object measurement stage. A weight sensing system measures a measurement weight W0 of a standard mass block m0; a background control system of an unmanned vending cabinet calculates a value of acorrection factor G*C based on a formula G*C=W0 / (m0*g0); the background control system of the unmanned vending cabinet records the value of the correction factor G*C, a to-be-weighed target object isplaced on a weighing tray of the weight sensing system of the unmanned vending cabinet, and the weight sensing system measures an actual measuring pressure F of the target object; and the backgroundcontrol system of the unmanned vending cabinet calculates an actual mass value m of the target object based on a formula: m=F / (g0*G*C). Therefore, the weight sensing system of the unmanned vending cabinet is perfected and the influence on weighing by a tilt error and a gravity acceleration error is compensated, so that the effect of killing two birds with one stone is realized and thus the unmanned vending system becomes more intelligent and precise.

Description

technical field [0001] The invention relates to the field of unmanned vending, in particular to a method for calibrating a standard weight of an unmanned vending cabinet weight sensing system. Background technique [0002] Unmanned vending cabinets are an inevitable product of the development of the retail industry and have been promoted more and more. However, none of the unmanned vending cabinets on the market currently have the function of automatically detecting goods. The system cannot automatically identify what goods consumers have taken. How many goods have been purchased, so it cannot be automatically settled, and consumers need to manually settle. This shopping process affects the pleasure of the consumption experience and affects the shopping efficiency. Moreover, for the elderly who do not know much about smart devices, there are operational obstacles, which is equivalent to a disguised form. The consumption of some consumer groups is rejected, and the popularity...

AI Technical Summary

Problems solved by technology

The existing unmanned vending cabinets with a weight sensing system have the following problems: 1. When the weight sensing type unmanned vending cabinets are used on a non-horizontal surface, because the multiple supporting feet (generally 4) of the container are not on a horizontal plane , the direction of the pressure exerted by the goods on the pallet is inconsistent with the standard force direction of the pressure sensor on the supporting foot, which will cause the test weight to be light. The greater the deviation angle between the two, the greater the measurement error

[0006] A weight block with a certain mass m, when its pressure F acts on the pallet due to gravity, will be affected by the local gravitational acceleration g and the inclination angle θ. F is in different regions and different angles of the ground plane on the earth The measurement will be different, so the power converted by the load cell of the pallet will be different. If the current general calculation method is used, that is, the calculation parameters from fixed power to mass, it will inevitably introduce large calculation errors.

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