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什么是RFID无线系统和NFC技术
RFID即射频识别(RFID),俗称电子标签,RFID射频识别是一种非接触式的自动识别技术,系统使用无线电波来识别物体,并使用阅读器与标签进行通信。标签物理地附加到可识别或可跟踪的对象上。
有几种类型的RFID系统,按“无源晶振”或“有源晶振”类型、工作频率和应用进行分组。顾名思义,无源 RFID 系统由一个没有板载电源的标签组成。相反,当在范围内时,标签通过标签的环形天线和整流器电路从阅读器接收的电磁场中收集能量。
根据 RFID 系统的类型,标签会向阅读器发送反馈信号,其中包含载频上的一些编码数据。该数据被收集并存储在位于标签中的存储器(EPROM - 可擦除可编程只读存储器)中。
无源类型的主要优势是标签的低成本和非常小尺寸的可能性。因此,您通常可以在支付卡或门禁卡中找到它们,以及嵌入到安全或流程控制标签中。
“有源”标签系统由自带电源的标签组成。这种类型的主要优势是长达 10m 的更长范围,而不是被动类型的通常 10cms。该范围受信号强度和从读取器拾取的任何噪声中恢复信号的能力的限制。为了帮助纠正这一点,有源 RFID 系统通常包括额外的噪声过滤技术,例如频移键控 (FSK) 或相移键控 (PSK)。
此外,有源类型系统中的标签会在阅读器天线上产生可变负载。读取器接收器可以检测到负载的这种变化。这就是标签的响应方式。RFID 的常见频率是 13.56MHz 的高频 (HF)。此外,125kHz 或 134kHz 的低频 (LF) 和 840 至 940MHz 的超高频 (UHF)。
RFID系统使用包括对象识别或跟踪。对象可以是您想要识别或跟踪的任何东西。RFID系统可以在多个细分市场中找到,包括安全和访问、零售、工业、医疗保健、运输物流、农业、农业和商业。
CS325S27000000EEQT | Citizen Finedevice Co Ltd | CRYSTAL 27.0000MHZ 10PF SMD | CS325S | MHz Crystal | 27MHz |
CS325S27000000EEQT | Citizen Finedevice Co Ltd | CRYSTAL 27.0000MHZ 10PF SMD | CS325S | MHz Crystal | 27MHz |
CS325S27000000EEQT | Citizen Finedevice Co Ltd | CRYSTAL 27.0000MHZ 10PF SMD | CS325S | MHz Crystal | 27MHz |
CFV-20638400AZFB | Citizen Finedevice Co Ltd | CRYSTAL 38.4000KHZ 12.5PF T/H | CFV-206 | kHz Crystal (Tuning Fork) | 38.4kHz |
CM315E32768DZCT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 9PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CM315E32768DZCT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 9PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CM315E32768DZCT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 9PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CM315E32768DZFT | Citizen Finedevice Co Ltd | CRYSTAL 32.768KHZ 12.5PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CM315E32768DZFT | Citizen Finedevice Co Ltd | CRYSTAL 32.768KHZ 12.5PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CM315E32768DZFT | Citizen Finedevice Co Ltd | CRYSTAL 32.768KHZ 12.5PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CM315E32768DZBT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 6PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CM315E32768DZBT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 6PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CM315E32768DZBT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 6PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CS325S33333300ABJT | Citizen Finedevice Co Ltd | CRYSTAL 33.3333MHZ 18PF SMD | CS325S | MHz Crystal | 33.3333MHz |
CS325S33333300ABJT | Citizen Finedevice Co Ltd | CRYSTAL 33.3333MHZ 18PF SMD | CS325S | MHz Crystal | 33.3333MHz |
CS325S33333300ABJT | Citizen Finedevice Co Ltd | CRYSTAL 33.3333MHZ 18PF SMD | CS325S | MHz Crystal | 33.3333MHz |
CM315E32768DZZT-4PF | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 4PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CM315E32768DZZT-4PF | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 4PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CM315E32768DZZT-4PF | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 4PF SMD | CM315E | kHz Crystal (Tuning Fork) | 32.768kHz |
CM309E4915200ABJT | Citizen Finedevice Co Ltd | CRYSTAL 4.9152MHZ 18PF SMD | CM309E | MHz Crystal | 4.9152MHz |
CM309E4915200ABJT | Citizen Finedevice Co Ltd | CRYSTAL 4.9152MHZ 18PF SMD | CM309E | MHz Crystal | 4.9152MHz |
CM309E4915200ABJT | Citizen Finedevice Co Ltd | CRYSTAL 4.9152MHZ 18PF SMD | CM309E | MHz Crystal | 4.9152MHz |
CM250C77503AZFT | Citizen Finedevice Co Ltd | CRYSTAL 77.5030KHZ 12.5PF SMD | CM250C | kHz Crystal (Tuning Fork) | 77.503kHz |
CM250C77503AZFT | Citizen Finedevice Co Ltd | CRYSTAL 77.5030KHZ 12.5PF SMD | CM250C | kHz Crystal (Tuning Fork) | 77.503kHz |
CM250C77503AZFT | Citizen Finedevice Co Ltd | CRYSTAL 77.5030KHZ 12.5PF SMD | CM250C | kHz Crystal (Tuning Fork) | 77.503kHz |
CFV-20677503DZFB | Citizen Finedevice Co Ltd | CRYSTAL 77.5030KHZ 12.5PF T/H | CFV-206 | kHz Crystal (Tuning Fork) | 77.503kHz |
CFV-20675000DZFB | Citizen Finedevice Co Ltd | CRYSTAL 75.0000KHZ 12.5PF T/H | CFV-206 | kHz Crystal (Tuning Fork) | 75kHz |
CM309A8.000156MABJT | Citizen Finedevice Co Ltd | CRYSTAL 8.000156MHZ 18PF SMD | CM309A | MHz Crystal | 8.000156MHz |
CM309A8.000156MABJT | Citizen Finedevice Co Ltd | CRYSTAL 8.000156MHZ 18PF SMD | CM309A | MHz Crystal | 8.000156MHz |
CM309A33.8688MABJT | Citizen Finedevice Co Ltd | CRYSTAL 33.8688MHZ 18PF SMD | CM309A | MHz Crystal | 33.8688MHz |
CM309A33.8688MABJT | Citizen Finedevice Co Ltd | CRYSTAL 33.8688MHZ 18PF SMD | CM309A | MHz Crystal | 33.8688MHz |
CM309A53.125MABJT | Citizen Finedevice Co Ltd | CRYSTAL 53.1250MHZ 18PF SMD | CM309A | MHz Crystal | 53.125MHz |
CM309A53.125MABJT | Citizen Finedevice Co Ltd | CRYSTAL 53.1250MHZ 18PF SMD | CM309A | MHz Crystal | 53.125MHz |
CM309B53.125MABJT | Citizen Finedevice Co Ltd | CRYSTAL 53.1250MHZ 18PF SMD | CM309B | MHz Crystal | 53.125MHz |
CM309B53.125MABJT | Citizen Finedevice Co Ltd | CRYSTAL 53.1250MHZ 18PF SMD | CM309B | MHz Crystal | 53.125MHz |
HCM4949152000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 49.1520MHZ 18PF SMD | HCM49 | MHz Crystal | 49.152MHz |
HCM4949152000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 49.1520MHZ 18PF SMD | HCM49 | MHz Crystal | 49.152MHz |
HCM4949152000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 49.1520MHZ 18PF SMD | HCM49 | MHz Crystal | 49.152MHz |
HCM4925175000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 25.1750MHZ 18PF SMD | HCM49 | MHz Crystal | 25.175MHz |
HCM4925175000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 25.1750MHZ 18PF SMD | HCM49 | MHz Crystal | 25.175MHz |
HCM4925175000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 25.1750MHZ 18PF SMD | HCM49 | MHz Crystal | 25.175MHz |
HCM495000000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 5.0000MHZ 18PF SMD | HCM49 | MHz Crystal | 5MHz |
HCM495000000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 5.0000MHZ 18PF SMD | HCM49 | MHz Crystal | 5MHz |
HCM495000000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 5.0000MHZ 18PF SMD | HCM49 | MHz Crystal | 5MHz |
HCM4940000000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 40.0000MHZ 18PF SMD | HCM49 | MHz Crystal | 40MHz |
HCM4940000000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 40.0000MHZ 18PF SMD | HCM49 | MHz Crystal | 40MHz |
HCM4940000000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 40.0000MHZ 18PF SMD | HCM49 | MHz Crystal | 40MHz |
HCM4933868800ABJT | Citizen Finedevice Co Ltd | CRYSTAL 33.8688MHZ 18PF SMD | HCM49 | MHz Crystal | 33.8688MHz |
HCM4933868800ABJT | Citizen Finedevice Co Ltd | CRYSTAL 33.8688MHZ 18PF SMD | HCM49 | MHz Crystal | 33.8688MHz |
HCM4933868800ABJT | Citizen Finedevice Co Ltd | CRYSTAL 33.8688MHZ 18PF SMD | HCM49 | MHz Crystal | 33.8688MHz |
CM309A12.352MABJT | Citizen Finedevice Co Ltd | CRYSTAL 12.3520MHZ 18PF SMD | CM309A | MHz Crystal | 12.352MHz |
CM309A12.352MABJT | Citizen Finedevice Co Ltd | CRYSTAL 12.3520MHZ 18PF SMD | CM309A | MHz Crystal | 12.352MHz |
CS325S20500000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 20.5000MHZ 18PF SMD | CS325S | MHz Crystal | 20.5MHz |
CS325S20500000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 20.5000MHZ 18PF SMD | CS325S | MHz Crystal | 20.5MHz |
CS325S20500000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 20.5000MHZ 18PF SMD | CS325S | MHz Crystal | 20.5MHz |
HC-49/U-S28224000ABJB | Citizen Finedevice Co Ltd | CRYSTAL 28.2240MHZ 18PF T/H | HC49US | MHz Crystal | 28.224MHz |
CM13032768DZYT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 7PF SMD | CM130 | kHz Crystal (Tuning Fork) | 32.768kHz |
CM13032768DZYT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 7PF SMD | CM130 | kHz Crystal (Tuning Fork) | 32.768kHz |
CM13032768DZYT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 7PF SMD | CM130 | kHz Crystal (Tuning Fork) | 32.768kHz |
CS325S19200000EEQT | Citizen Finedevice Co Ltd | CRYSTAL 19.2000MHZ 10PF SMD | CS325S | MHz Crystal | 19.2MHz |
CS325S19200000EEQT | Citizen Finedevice Co Ltd | CRYSTAL 19.2000MHZ 10PF SMD | CS325S | MHz Crystal | 19.2MHz |
CS325S19200000EEQT | Citizen Finedevice Co Ltd | CRYSTAL 19.2000MHZ 10PF SMD | CS325S | MHz Crystal | 19.2MHz |
CM309A12.500MABJT | Citizen Finedevice Co Ltd | CRYSTAL 12.5000MHZ 18PF SMD | CM309A | MHz Crystal | 12.5MHz |
CM309A12.500MABJT | Citizen Finedevice Co Ltd | CRYSTAL 12.5000MHZ 18PF SMD | CM309A | MHz Crystal | 12.5MHz |
CM309B16.000312MABJT | Citizen Finedevice Co Ltd | CRYSTAL 16.000312MHZ 18PF SMD | CM309B | MHz Crystal | 16.000312MHz |
CM309B16.000312MABJT | Citizen Finedevice Co Ltd | CRYSTAL 16.000312MHZ 18PF SMD | CM309B | MHz Crystal | 16.000312MHz |
CMR200T32768EZFT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 12.5PF SMD | CMR200T | kHz Crystal (Tuning Fork) | 32.768kHz |
CMR200T32768EZFT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 12.5PF SMD | CMR200T | kHz Crystal (Tuning Fork) | 32.768kHz |
CMR200T32768EZFT | Citizen Finedevice Co Ltd | CRYSTAL 32.7680KHZ 12.5PF SMD | CMR200T | kHz Crystal (Tuning Fork) | 32.768kHz |
HCM4914745600ABJT | Citizen Finedevice Co Ltd | CRYSTAL 14.7456MHZ 18PF SMD | HCM49 | MHz Crystal | 14.7456MHz |
HCM4914745600ABJT | Citizen Finedevice Co Ltd | CRYSTAL 14.7456MHZ 18PF SMD | HCM49 | MHz Crystal | 14.7456MHz |
HCM4914745600ABJT | Citizen Finedevice Co Ltd | CRYSTAL 14.7456MHZ 18PF SMD | HCM49 | MHz Crystal | 14.7456MHz |
HCM4912000393ABJT | Citizen Finedevice Co Ltd | CRYSTAL 12.000393MHZ 18PF SMD | HCM49 | MHz Crystal | 12.000393MHz |
HCM4912000393ABJT | Citizen Finedevice Co Ltd | CRYSTAL 12.000393MHZ 18PF SMD | HCM49 | MHz Crystal | 12.000393MHz |
HCM4912000393ABJT | Citizen Finedevice Co Ltd | CRYSTAL 12.000393MHZ 18PF SMD | HCM49 | MHz Crystal | 12.000393MHz |
HCM494032000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 4.0320MHZ 18PF SMD | HCM49 | MHz Crystal | 4.032MHz |
HCM494032000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 4.0320MHZ 18PF SMD | HCM49 | MHz Crystal | 4.032MHz |
HCM494032000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 4.0320MHZ 18PF SMD | HCM49 | MHz Crystal | 4.032MHz |
HCM4916000312ABJT | Citizen Finedevice Co Ltd | CRYSTAL 16.000312MHZ 18PF SMD | HCM49 | MHz Crystal | 16.000312MHz |
HCM4916000312ABJT | Citizen Finedevice Co Ltd | CRYSTAL 16.000312MHZ 18PF SMD | HCM49 | MHz Crystal | 16.000312MHz |
HCM4916000312ABJT | Citizen Finedevice Co Ltd | CRYSTAL 16.000312MHZ 18PF SMD | HCM49 | MHz Crystal | 16.000312MHz |
HCM4928636360ABJT | Citizen Finedevice Co Ltd | CRYSTAL 28.63636MHZ 18PF SMD | HCM49 | MHz Crystal | 28.63636MHz |
HCM4928636360ABJT | Citizen Finedevice Co Ltd | CRYSTAL 28.63636MHZ 18PF SMD | HCM49 | MHz Crystal | 28.63636MHz |
HCM4928636360ABJT | Citizen Finedevice Co Ltd | CRYSTAL 28.63636MHZ 18PF SMD | HCM49 | MHz Crystal | 28.63636MHz |
HCM4911520000ABJT | Citizen Finedevice Co Ltd | CRYSTAL 11.5200MHZ 18PF SMD | HCM49 | MHz Crystal | 11.52MHz |
NFC的全称为近场通信技术(NFC) 是利用 RFID 技术的全球行业标准。NFC 以 13.56 MHz 的 RFID 技术为基础,适用于极短距离(例如 0.2m)。数据存储在 NFC 集成电路 (IC) 上的 EPROM 中。如果需要,可以使用添加安全性的选项来读取或写入。
存在NFC标签、NFC读写器、点对点(例如,两个设备之间)和卡仿真模式(例如,非接触式支付)的三种“模式”。
NFC 技术超越了 RFID 的这一附加功能,并已集成到最新的智能手机中,允许手机用于非接触式支付或其他 NFC 通信应用。这种采用有助于使 NFC 更广为人知,NFC 标签位于产品或广告点上,以便快速访问有关产品或服务的信息
RFID应用:非接触式支付,访问控制,资产追踪,车库门开启器,车辆无钥匙进入,野生动物追踪