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High-performance anti-collision surface acoustic wave delay line type wireless sensor system

A surface acoustic wave delay and wireless sensor technology, which is applied in the direction of instruments, inductive record carriers, and record carriers used by machines, can solve problems such as unclear practical prospects, achieve low actual radio frequency power, low cost, and improve detection sensitivity Effect

Active Publication Date: 2015-12-02
CETC DEQING HUAYING ELECTRONICS
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Problems solved by technology

[0020] Using software algorithms to expand the anti-collision function of surface acoustic wave sensors, although progress has been made, the practical prospects are uncertain

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  • High-performance anti-collision surface acoustic wave delay line type wireless sensor system
  • High-performance anti-collision surface acoustic wave delay line type wireless sensor system
  • High-performance anti-collision surface acoustic wave delay line type wireless sensor system

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Embodiment Construction

[0059] Premier Wen Jiabao proposed in August 2009 that the industrialization of "sensing China" or "smart sensor network" should be accelerated. This year, the central government began to implement "Made in China 2025" and "Internet +", which is a major deployment of my country's economic development and a strong support for improving national strength and realizing the "Chinese Dream". The basic characteristics of the intelligent sensor network are: sensor nodes are everywhere, which can sense environmental changes at any time and collect them through wireless links to the information center for processing and inform users. Sensors that can be wirelessly networked are the basis of the intelligent sensor network.

[0060] The surface acoustic wave (SAW) wireless sensor based on the radar principle developed in recent years does not require an external power supply, has strong anti-interference ability, and can work reliably in various harsh environments (such as high temperatur...

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Abstract

The invention provides a high-performance anti-collision surface acoustic wave delay line type wireless sensor system. A transponder sensing chip input transducer is a code interdigital transducer (input dependence transponder), the codes of the transponder sensing chip input transducer are compatible codes which belong to the same compatible code group, and a transponder which adopts the same compatible code encoding chip is called a similar transponder. The transponder sensing chip is provided with at least two same-frequency output dependence transducers arranged along a sound track, and the preferable codes of the transponder sensing chip are barker codes. The starting delay distances of the first output transducers and the input transducers of different similar transponder chips are mutually different; intervals among all output transducers are consistent; and a design causes all echo peaks to be distinguished by a reader after electromagnetic echoes simultaneously generated by the similar transponders are overlapped within a test range of a nominal sensing amount. The reader is provided with a compatible code generation component and barker code demodulation component. The anti-collision function of the system is equal to a value obtained by that the number of different types of transponders is multiplied by a time sequence capacity.

Description

【Technical field】 [0001] The invention relates to a surface acoustic wave wireless sensor, in particular to a high-performance anti-collision surface acoustic wave delay line type wireless sensor system. 【Background technique】 [0002] Real-time monitoring of the temperature of power grid equipment is the basic means of smart grid, and the market demand is urgent. Due to the special environment of the power grid, conventional temperature sensors cannot be applied, and the use of surface acoustic wave wireless sensor telemetry technology is an internationally recognized better solution. [0003] The surface acoustic wave (SurfaceAcousticWave, SAW) wireless sensor based on the radar principle developed in recent years does not require external power supply, has strong anti-interference ability, and can work reliably in various harsh environments (such as high temperature, strong electromagnetic interference and nuclear radiation, etc.) , is a supplement to commonly used IC se...

Claims

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Application Information

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IPC IPC(8): G06K19/077G06K7/00
Inventor 陈培杕朱卫俊李勇邹梁曹金荣
Owner CETC DEQING HUAYING ELECTRONICS
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