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1. 发明申请

WO2007024416A3 RFID READER AND COMPONENTS THEREOF 审中-公开
标题翻译： RFID读写器及其组件
公开(公告)号：WO2007024416A3
公开(公告)日：2007-05-18
申请号：PCT/US2006029629
申请日：2006-07-27
申请人： APPLIED WIRELESS IDENTIFICATIO , PALEY DANIEL NOAH , STEWART ROGER GREEN , ZHOU LIMING , KIKIN VADIM
发明人： PALEY DANIEL NOAH , STEWART ROGER GREEN , ZHOU LIMING , KIKIN VADIM
IPC分类号： G06K7/00
CPC分类号： G06K7/0008
摘要： A Radio Frequency Identification (RFID) reader according to one embodiment of the invention includes a first microprocessor acting as a controller, and a second microprocessor, e.g., DSP, in communication with the first microprocessor, the second microprocessor generating a digitally synthesized waveform. A converter converts the digitally synthesized waveform to an analog waveform. A modulator combines the analog waveform with a carrier signal for generating an outgoing signal. The waveform may have rising and falling edges of varying shape. A RFID reader in another embodiment includes an amplifier for amplifying an incoming RF signal, a switchable filter receiving an amplified signal from the amplifier, and mixers receiving a filtered signal from the filter. An RFID reader in another embodiment has adaptive carrier cancellation. A circuit for amplitude modulating a carrier signal is presented. Methods are also presented.
摘要翻译：根据本发明的一个实施例的射频识别（RFID）读取器包括用作控制器的第一微处理器和与第一微处理器通信的第二微处理器，例如DSP，第二微处理器产生数字合成的波形。 A转换器将数字合成波形转换为模拟波形。调制器将模拟波形与载波信号相结合，用于产生输出信号。波形可能具有不同形状的上升和下降沿。另一实施例中的RFID读取器包括用于放大输入RF信号的放大器，可从放大器接收放大信号的可切换滤波器，以及从滤波器接收滤波信号的混频器。另一实施例中的RFID读取器具有自适应载波消除。提出了一种用于幅度调制载波信号的电路。还提出了方法。

2. 发明专利

AU2021104830A4 A micro piezoelectric axial flow fan 未知
公开(公告)号：AU2021104830A4
公开(公告)日：2022-05-26
申请号：AU2021104830
申请日：2021-08-02
申请人： UNIV JILIN , LIU YANBO , WU YUE , ZHOU LIMING
发明人： LIU YANBO , ZHOU LIMING , WU YUE
IPC分类号： F04B43/04 , F04D25/06
摘要： A micro piezoelectric axial flow fan has a piezoelectric vibrator (1) and a base (2). The base (2), a rectangular block with a smaller thickness, has a piezoelectric vibrator mounting slot (21) arranged on the top surface of the rectangular block, which can install the piezoelectric vibrator (1); The piezoelectric vibrator mounting slot (21) has a cavity slot (22) in the centre of the bottom which can form a sealed cavity (3) with the piezoelectric vibrator (1) after installation; The cavity slot (22)has a flow hole (23) at the centre position of the bottom which can connect the cavity (3) to the external air; The base (2) has the first rectangular hole (24) and the second rectangular hole (25) in two vertical directions on the side. The two rectangular holes are interconnected and connected with the flow hole (23). In this way, the flow hole (23) is divided into two parts: internal flow hole (231) and external flow hole (232). When working, the piezoelectric vibrator (1) occurs reciprocating bending vibration, the volume of the cavity (3) increases and decreases, the fluid flows in and out through the flow hole (23), and the gas is inhaled from the rectangular hole (24) (25) and discharged from the external flow hole (232). It has the characteristics of small volume and simple structure.

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