Method, device and system for expanding reading head

An expansion device and expansion method technology, applied in the direction of instruments, induction record carriers, computer components, etc., can solve the problems of not being able to divide too many channels, increasing signal attenuation, and large signal attenuation back and forth, to achieve extended reading range, Reduce the number of usage and ensure the effect of reading efficiency

Inactive Publication Date: 2012-12-26
SHENZHEN JIESHUN SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] First, because the inherent loss of the RF switch cannot be avoided, it cannot be divided into too many channels. The multiple channels of the RF switch will cause the signal to attenuate too much back and forth, and the reading efficiency will decrease;
[0007] Second, the remoteness of the antenna increases the difficulty of construction, and at the same time attenuates the signal of the antenna itself. If the antenna is too long, the reading efficiency will also decrease;
[0008] Third, when multi-channel work is turned on at the same time, the distribution of signals will also lead to increased signal attenuation, resulting in problems such as decreased reading efficiency

Method used

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  • Method, device and system for expanding reading head
  • Method, device and system for expanding reading head
  • Method, device and system for expanding reading head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a method for extending the reading head, wherein, this embodiment will be described from the perspective of the expansion device, and the details can be as follows:

[0031] A method for extending a reading head, comprising: receiving a downlink signal sent by a reading head device, the downlink signal is obtained by combining a first local oscillator signal and a first frequency conversion signal, restoring the downlink signal, and sending the restored downlink signal Give the radio frequency identification RFID card, make the RFID card respond and send the uplink signal to the reading head device.

[0032] see figure 1 , the specific process can be as follows:

[0033] 101. Receive the downlink signal sent by the reading head device, the downlink signal is obtained by combining the first local oscillator signal and the first frequency conversion signal;

[0034] The reading head device can obtain the first local oscillator signal and the fir...

Embodiment 2

[0045] This embodiment provides a method for extending the reading head, wherein, this embodiment will describe from the perspective of the reading head device, specifically as follows:

[0046] A method for extending a reading head, comprising: acquiring a first local oscillator signal and a first frequency conversion signal, combining the first local oscillator signal and the first frequency conversion signal to obtain a combined downlink signal, and combining the combined The downlink signal is sent to the expansion device, so that the expansion device restores the downlink signal, and sends the restored downlink signal to the RFID card, so that the RFID card responds and sends the uplink signal, and receives the uplink signal sent by the RFID card.

[0047] see figure 2 , the specific process can be as follows:

[0048] 201. Acquire a first local oscillator signal and a first frequency conversion signal, and combine the first local oscillator signal and the first frequen...

Embodiment 3

[0060] This embodiment will describe the embodiment of the present invention in detail in conjunction with the reading head device and the expansion device, as follows, please refer to image 3 :

[0061] 301. The head reading device acquires the first local oscillator signal and the first frequency conversion signal, and combines the first local oscillator signal and the first frequency conversion signal to obtain a combined downlink signal;

[0062] 302. The head reading device sends the combined downlink signal to the expansion device;

[0063] 303. The expansion device receives the downlink signal sent by the reading head device;

[0064] 304. The expansion device restores the downlink signal, and sends the restored downlink signal to the RFID card;

[0065] Wherein, the RFID card responds and sends the uplink signal to the reading head device;

[0066] 305. The head reading device receives the uplink signal sent by the RFID card, and completes signal interaction betwee...

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PUM

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Abstract

The embodiment of the invention discloses a method, a device and a system for expanding a reading head. The method disclosed by the embodiment of the invention comprises the steps of: receiving a downlink signal transmitted by a reading head device, wherein the downlink signal is obtained by combining a first local oscillator signal with a first variable frequency signal; and restoring the downlink signal, transmitting the restored downlink signal to a radio frequency identification (FRID) card, and enabling the RFID card to respond and transmit the downlink signal to the reading head device. According to the embodiment, a channel of the downlink signal can be changed; divided channel transmission of the uplink signal and the downlink signal is achieved; the sensitivity of the reading head can be improved; the reading efficiency is ensured when the reading range is expanded, and the use quality of the reading head is reduced.

Description

technical field [0001] The invention relates to the communication field, in particular to a reading head expansion method, device and system. Background technique [0002] Radio frequency identification (RFID, Radio Frequency IDentification) technology can identify specific targets through radio signals and read and write related data without the need to establish mechanical or optical contact between the identification system and specific targets. Specifically, RFID technology includes an interrogator and a transponder. When the transponder enters the magnetic field, it receives the radio frequency signal sent by the interrogator, and sends out the product information stored in the chip by virtue of the energy obtained by the induced current, or actively transmits a certain frequency After the signal is read and decoded by the interrogator, it is sent to the central information system for relevant data processing. [0003] RFID technology has been widely used in many indus...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G06K7/00
Inventor唐健邓小友王健王占波黄保华徐原森
OwnerSHENZHEN JIESHUN SCI & TECH IND