Active electronic tags capable of regulating inductive distance individually and method for processing signal of matched card reader

Abstract

The invention discloses active electronic tags capable of regulating an inductive distance individually and a method for processing a signal of a matched card reader. The method comprises the following steps of: setting a card reader on a test vehicle and setting an electronic tag at an entrance of a vehicle examination hall, presetting card reading distance parameters in the electronic tag, when the electronic tag receives a card reading signal of the card reader, returning an ID (Identity) number of the electronic tag and the card reading distance parameters to the card reader; when the card reader receives a response signal of the electronic tag, actually detecting intensity of a wireless signal transmitted by the electronic tag, after the card reader receives the signal of the electronic tag completely, comparing the actually detected electronic tag wireless signal intensity with the card reading distance parameters in the electronic tag response signal. With the invention, an inductive distance of each electronic tag can be flexibly regulated, so that the card reader which uses a signal processing method has great flexibility in an application of a vehicle test system.

Description

[0001] technical field [0002] The invention relates to an intelligent identification system in motor vehicle road examinations, in particular to an active electronic tag with a single adjustable sensing distance and a signal processing method for a matching card reader. Background technique [0003] During the motor vehicle road test, the card reader is placed on the test vehicle, and the electronic tag is placed at the entrance of the test item. When the test vehicle enters the test item, the vehicle senses the electronic tag on the roadside, outputs information through the serial port, and notifies the test The vehicle's on-board computer system vehicles enter specific test items. [0004] In the existing card reader and electronic tag system, the adjustment of the sensing distance is mainly done by adjusting the card reader, which causes that once the card reader is adjusted, the sensing distance of any electronic tag on the field will increase or decrease at the same t...

AI Technical Summary

Problems solved by technology

[0004] In the existing card reader and electronic tag system, the adjustment of the sensing distance is mainly done by adjusting the card reader, which causes that once the card reader is adjusted, the sensing distance of any electronic tag on the field will increase or decrease at the same time, which will cause The phenomenon that the card reader misreads the card number of adjacent items or misses the card number of an item with a relatively wide entrance

[0005] When the existing card reader adjusts the sensing distance of the card reader farther, the working situation is as follows: figure 1 As shown, in order to avoid missing card reading in channel 1 with a wider entrance, adjust the sensing distance of the card reader on test vehicle 3, and adjust the sensing distance farther, so that the electronic tags 4 of all test item channels in the test site will sense The distances are all increased, so that the sensing distance of the electronic tag 4 of the channel 2 of the test item with a narrow entrance exceeds the width of the channel, so that the sensing range 5 overlaps in some item channels. If the vehicle enters the position where the sensing range 5 overlaps, the on-board The card reader can not only read the electronic tag information of the item entered by itself, but also read the electronic tag information of other test items, causing misreading

[0006] When the existing card reader adjusts the sensing distance of the card reader closer, the working situation is as follows: figure 1 As shown, in order to prevent the above-mentioned erroneous card reading phenomenon, the sensing distance of the card reader on the test vehicle 3 is reduced. At this time, the sensing distances of all the electronic tags 4 on the venue are all reduced. Although this makes the test item with a narrow entrance The sensing distance of the electronic tag 4 in channel 2 is appropriate, but when the test vehicle 3 enters the test item channel 1 with a wider entrance, the vehicle may be outside the sensing range 5, and the information of the electronic tag 4 cannot be sensed, resulting in the phenomenon of missing card reading

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