Low-power-consumption radio frequency card reading circuit
A technology of radio frequency card reading and low power consumption, which is applied in electromagnetic radiation induction, instruments, induction record carriers, etc., which can solve the problems of user inconvenience, frequent battery replacement, etc., and achieve the effect of reducing power consumption
Inactive Publication Date: 2016-08-17
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
[0007] The purpose of the present invention is to provide a low-power radio frequency card reader circuit to solve the problem of frequent battery replacement and inconvenience to users in applications without mains power supply
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[0019] The present invention will be further described in detail below in combination with specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.
[0020] combine figure 1 The structure schematic diagram of the present invention shown; Wherein, the low power consumption radio frequency card reader circuit of the present invention comprises antenna, power amplifier circuit, detection circuit, filter amplifier circuit and microprocessor; Wherein, microprocessor passes power amplifier circuit and antenna connection, the antenna is connected with the detection circuit, and the detection circuit is connected with the microprocessor through the filter amplifier circuit.
[0021] The microprocessor works in the card-hunting mode, and it outputs a card-...
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The invention discloses a low-power radio frequency card reading circuit, which includes an antenna, a power amplifier circuit, a detection circuit, a filter amplifier circuit and a microprocessor; The device judges whether the radio frequency card is detected according to the returned card search signal; if the radio frequency card is detected, the microprocessor outputs the carrier signal and transmits it through the antenna, the detection circuit restores the useful signal from the returned carrier signal, and the filter amplifier circuit is useful The signal is shaped and amplified, and the microprocessor decodes the useful signal after shaping and amplified to obtain the encoded data of the radio frequency card. Therefore, when the present invention is working, only when the radio frequency card is detected by the card-seeking signal, the carrier signal is sent, so that the power consumption is reduced, and the battery needs to be replaced frequently when there is no mains power supply. Inconvenience problem.
Description
technical field [0001] The invention relates to the field of radio frequency card reading circuits, in particular to a low power consumption radio frequency card reading circuit. Background technique [0002] Radio Frequency Identification (RFID) is an automatic identification technology that uses induction, electromagnetic fields or electromagnetic waves as transmission means to complete non-contact two-way communication and obtain relevant data. [0003] The biggest advantage of the radio frequency identification card is that it is non-contact, so no manual intervention is required to complete the identification work, it is suitable for automation and is not easy to damage, it can identify high-speed moving objects and can identify multiple radio frequency cards at the same time, and the operation is fast and convenient. At present, radio frequency identification technology has been widely used and is ready to replace many current manual work procedures. RFID technology i...
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Login to View More IPC IPC(8): G06K7/10
CPCG06K7/10009
Inventor 王敏周建斌周伟刘易马英杰方方丁卫撑刘颖
Owner CHENGDU UNIVERSITY OF TECHNOLOGY