Intelligent electronic label based on SAW (Surface Acoustic Wave) passive temperature measurement chip
An intelligent electronic label, passive temperature measurement technology, applied to record carriers, instruments, computer parts and other directions used in machines, can solve the problem of short duration of effective echo signals, increased loss of received energy, and unfavorable signal acquisition and processing. and other problems to achieve the effect of good matching effect, reducing impact and improving performance
Inactive Publication Date: 2014-01-01
TIANJIN 712 COMM & BROADCASTING CO LTD +1
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Problems solved by technology
[0004] In the prior art, the helical antenna in the passive UHF RFID system is generally connected to the PCB board in the form of full welding at the bottom. The matching circuit is designed to increase the loss of received energy, resulting in a large energy loss of the tag in its feeding mode, resulting in a short duration of the effective echo signal, which is not conducive to signal acquisition and processing
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[0016] Such as figure 1 , figure 2 As shown, the smart electronic label based on the SAW passive temperature measurement chip includes a helical antenna 1, a PCB board 2, and a SAW temperature sensor 3. The upper part of the helical antenna 1 has 2.5 turns, and the bottom part integrated with the helical antenna 1 is vertical. The standing point 1-1, the SAW temperature sensor 3 is welded on the PCB board 2, and the helical antenna 1 is welded on the PCB board 2 through the vertical standing point 1-1, realizing the double resonant structure of the helical antenna 1 and the microstrip antenna, and the helical antenna Antenna 1 and the microstrip antenna are fed at the same point, so that the matching effect between the antenna and the chip is better, and the step of adding a matching circuit can be saved, and at the same time, part of the energy lost by the matching circuit is eliminated. Energy loss is reduced.
[0017] The helical antenna 1 is made of stainless steel.
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The invention relates to an intelligent electronic label based on an SAW (Surface Acoustic Wave) passive temperature measurement chip, and the intelligent electronic label has recognition and temperature measurement functions. The intelligent electronic label comprises a helical antenna, a PCB (Printed Circuit Board), and an SAW temperature sensor, wherein the number of turns of the upper part of the helical antenna is 2.5, and a bottom integrated with the helical antenna is provided with a vertical standing point; the SAW temperature sensor is welded on the PCB; the helical antenna is welded on the PCB through the vertical standing point. The intelligent electronic label has the beneficial effects that the profile of the helical antenna is lower than that of a helical antenna in the prior art, so that a design objective of label miniaturization is realized; the optimized spiral antenna is connected to the PCB by adopting the bottom vertical standing point, so that the double-resonance structures of the helical antenna and a microstrip antenna are realized in the label, the helical antenna and the microstrip antenna feed electricity at the same point, and thus the matching effect between each antenna and the chip is relatively good, the step of adding a matching circuit can be omitted, and meanwhile, part of energy consumed by the matching circuit is also saved; in short, the energy loss of the label is reduced, and the echo duration of effective signals is prolonged.
Description
technical field [0001] The invention relates to surface acoustic wave radio frequency identification technology (SAW-RFID), in particular to an intelligent electronic label based on a SAW passive temperature measurement chip with identification and temperature measurement functions. Background technique [0002] Radio frequency identification technology is an automatic identification technology that began to rise in the 1990s and has gradually matured in recent years. Radio frequency identification technology is a technology that uses radio frequency signals to achieve non-contact information transmission through spatial coupling and achieves identification purposes through the transmitted information. This technology has been more and more widely used due to its advantages of non-contact, large storage capacity, fast identification speed, long distance, and multi-card identification. With the maturity of RFID technology and the decline of the cost of RFID tags, some develo...
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IPC IPC(8): G06K19/077
Inventor 李鸿儒于丽娟李彪
Owner TIANJIN 712 COMM & BROADCASTING CO LTD