Automatic tray pricing system based on surface acoustic wave technology

Abstract

The invention discloses an automatic tray pricing system based on a surface acoustic wave technology, and belongs to the technical field of wireless transmission. The system mainly comprises an upper computer, a wireless transceiver installed on a pricing table, a radio frequency antenna and wireless passive surface acoustic wave radio frequency tags, wherein the wireless transceiver installed on the pricing table transmits a radio frequency query signal and receives a returned signal including radio frequency tag numbers, and the passive surface acoustic wave radio frequency tags are installed at the bottom of a food container; when a tray holding the food container is placed within the working range of the wireless transceiver, the wireless transceiver transmits query pulse, and reads reflection information of all surface acoustic wave radio frequency tags in the tray at single time; the wireless transceiver amplifies and demodulates the received signal and then converts the signal into coded information, and the coded information of all tags within the working range is obtained via an anti-collision algorithm and transmitted to the database of the upper computer to obtain pricing information. The system can obviously improve the statistical pricing efficiency and reduce personal pricing errors; the surface acoustic wave radio frequency tags installed at the bottom of the food container are wireless and passive, work in a pulse query mode and can reliably work in an environment of liquid or metal, so that the reliability of the system is improved.

Description

technical field [0001] The invention relates to the field of wireless transmission technology, in particular to a device for automatically reading the number of containers in a tray in a restaurant or other places, in particular, it is used in restaurants and other places to automatically count the food taken by self-service diners Type and share, pallet automatic pricing system based on surface acoustic wave technology for fast pricing. Background technique [0002] Many restaurants in public service places such as schools take self-service meals, and the price is uniformly priced at the exit. Dishes, fruits and various foods are first served in multiple plates in equal amounts, and diners take them by themselves. The service staff calculates the total price according to the quantity and type of food taken, and makes settlement. This method improves service efficiency, saves labor costs, and improves diner satisfaction. This type of dining method mainly appears in school ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to improve the efficiency of statistical pricing, solve the problem of staff pricing errors, and provide a one-time counting of the food quantity taken by diners, and automatically provide the total price information based on the tray automatic pricing system of surface acoustic wave technology

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