Low-frequency card reader device based on em4095 that can recognize three modulation methods

A modulation method and card reader technology, used in instruments, inductive record carriers, computer parts, etc., can solve problems such as poor general performance, inability to recognize other types of radio frequency cards, and reduced work efficiency, achieving low cost and low cost. Resource cost, effect of improving versatility

Inactive Publication Date: 2015-08-12
上海英特罗机械电气制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the singleness of card reader recognition, its general performance is not good, and it cannot recognize other types of radio frequency cards. Some application units may even use multiple card readers at the same time, which greatly reduces work efficiency.

Method used

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  • Low-frequency card reader device based on em4095 that can recognize three modulation methods
  • Low-frequency card reader device based on em4095 that can recognize three modulation methods
  • Low-frequency card reader device based on em4095 that can recognize three modulation methods

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] Such as figure 1 As shown, this embodiment adopts the main control module of low power consumption and high-performance STM32 single-chip microcomputer, 125K antenna, and the EM4095-based read-write module, LCD liquid crystal display module, and button circuit connected to the main control module and controlled by it . Specifically, the system uses STM32F103 single-chip microcomputer as the main control module, and controls the interpretation and display of the original data signal demodulated by EM4095 through the I / O port. The 125K antenna coil with figure 2 The two parallel capacitors C221 and C222 shown are connected in series to form a resonant circuit and resonate at 125KHz. When the 125KHz radio frequency card is placed on the antenna coil, the resonant circuit and the inductance coil in the card generate an alternating magnet...

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PUM

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Abstract

The invention relates to an EM4095-based low-frequency card reader device capable of identifying three modulation modes. The existing card reader is single in identification mode. The device comprises a singlechip main control module, a transmission unit and an EM4095-based read-write model, an LCD (Liquid Crystal Display) module and a press key circuit, wherein the EM4095-based read-write model, the LCD module and the press key circuit are connected with the singlechip main control module and controlled by the singlechip main control module. The EM4095-based read-write model can be used for demodulating data information of the three modulation modes including ASK (amplitude shift keying), FSK (frequency shift keying) and PSK (phase shift keying). The device is compatible with three hardware protocols of the FSK modulation mode, the PSK modulation mode and the ASK modulation mode, and the information inside a radio-frequency card can be quickly and accurately identified and displayed on an LCD.

Description

technical field [0001] The invention belongs to the technical field of radio frequency identification, and relates to a low-frequency card reader device capable of identifying three modulation modes based on EM4095. Background technique [0002] RFID (Radio Frequency Identification Technology) radio frequency identification technology is a non-contact automatic identification technology. It uses radio frequency signals to achieve non-contact information transmission through spatial coupling and achieves identification purposes through the transmitted information. The radio frequency card is a non-contact read-write card. It is a new type of memory card different from the previous IC card or magnetic card. It has the characteristics of fast information processing speed, no wear, large data storage capacity, and long service life. It is widely used in Industry, enterprise, commerce, transportation, transportation, control management and many other fields. At the same time, wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/00
Inventor 张海峰史维玉吕小燕张沛潘孝群杨竹
Owner 上海英特罗机械电气制造股份有限公司
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