Total price automatic calculator of dining room selling dishes

Abstract

A total price automatic calculator of dining room selling dishes provided by the invention comprises a pedestal, a signal line, a single-chip microcomputer, a display and an induction piece. The pedestal is in a groove shape, the groove is provided with a weight sensor and a RFID sensor, parts are connected through the signal line; the display is provided with a buzzer and an indication lamp, and the induction piece corresponds to the display and is connected with the RFID inductor through induction signals; and when the single-chip microcomputer detects the induction signals of the pedestal and the reduced weight, the single-chip microcomputer sends corresponding dish prices to the display, the buzzer and the indication lamp emit prompts, and the dish prices are accumulated until the withholding is successful and the display is automatically resetted. The induction piece is pasted at the bottom of a spoon at usage, the plastic dishes containing vegetables to be sold are disposed on the pedestal, and the prices of the vegetables to be sold are set in advance; the spoon is used for fetching the vegetables, the induction piece is able to close to the RFID inductor and the weight of the plastic dishes may be reduced, the single-chip microcomputer detects the induction piece signals and the weight reducing signals, and the prices of the vegetables are sent to the corresponding display; and the assigned device emits a prompt, the prices of the vegetables are accumulated until the withholding is successful, and the display is automatically resetted.

Description

technical field [0001] The invention belongs to the field of automatic control, and relates to an automatic calculator for the total price of dishes sold in a canteen. Background technique [0002] The canteen card reader is an important part of the canteen charging system and an important factor affecting the efficiency of catering. Now when teachers and students order vegetables in the cafeteria, the vegetable seller calculates the total price while ordering the vegetables, and finally the master presses the total price on the card reader. Miscalculation and miscalculation of the total price often occur. An automatic calculator for the total price of dishes sold in canteens, which can free the vegetable seller from the tedious work of ordering vegetables, calculating the total price, and finally calculating the total price, which can effectively reduce the queuing time of employees and students. Contents of the invention [0003] Aiming at the deficiencies of the prior ...

AI Technical Summary

Problems solved by technology

Now when teachers and students order vegetables in the cafeteria, the vegetable seller calculates the total price while ordering the vegetables, and finally the teacher presses the total price on the card reader. There are often situations where the total price is calculated wrongly and the wrong total price is pressed

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