Apparatus and method for reading plate labels in the form of double wire frames

Abstract

The invention relates to the technical field of radio frequency identification, and particularly relates to a double-wireframe-type dinner plate label reading device which can read labels of dinner plates accurately, and reduce the misreading rate and the jump-reading rate. The double-wireframe-type dinner plate label reading device is characterized by being provided with two matching circuits as well as two antennas which are in one-to-one correspondence connection with the matching circuits; output ends of the matching circuits are connected with the antennas; frame-type coils are adopted for coils of the antennas; an input end of each matching circuit is respectively connected with a radio frequency switching circuit; a control signal input end of the radio frequency switching circuit is connected with a micro control chip; a radio frequency signal input end of the radio frequency switching circuit is connected with a radio frequency signal transmitting circuit; the two antenna coils are partially overlapped. Compared with the prior art, the double-wireframe-type dinner plate label reading device disclosed by the invention has the advantages that the dinner plate labels can be read accurately, and the misreading rate and the jump-reading rate can be reduced.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification, in particular to a double-line frame-type dinner plate label reading device and method capable of realizing accurate reading of the plate label and reducing the rate of missed reading and false reading. Background technique [0002] In recent years, the catering settlement industry has achieved rapid development. The traditional manual settlement method is to manually judge the price of the dishes and then calculate it on the computer. This settlement method is not only time-consuming and labor-intensive, but also often leads to errors due to objective factors. It can no longer meet the needs of practical applications. Using RFID technology to realize fast reading of dinner plates is already a demand of the catering industry. It can realize fully automatic settlement, reduce the error rate of settlement, and greatly improve the efficiency of settlement. However, at present...

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Problems solved by technology

However, at present, the plate antenna in the plate tag reading device mostly adopts the form of a single large antenna frame, which mainly has two disadvantages. First, there is a blind area in the middle of the plate antenna, and there is a phenomenon of missing reading: Dinner plate antenna, due to the large area of ​​the plate antenna, the magnetic field is relatively sparsely distributed in the middle of the antenna. When reading the plate label with a relatively large area, the reading distance is longer and the effect is better, but the plate label should be embedded in the The area of ​​the bottom of the dinner plate or bowl is only the size of a button. When the antenna area of ​​the designed dinner plate is large, there will be a blind spot in the middle of the antenna. The reading distance of the plate tag is short, but it cannot meet the actual needs; second, the reading range is uncontrollable, and there is a phenomenon of cross-reading: when the area of ​​the plate antenna is relatively large, the magnetic field energy around the plate is relatively strong, and it can be read The plate label outside the antenna frame of the plate leads to a certain error between the actual settlement value of the user and the actual consumption value, and the settlement error rate is high, which affects the use of customers and does not meet the actual application requirements.

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