Home >Documents >Prof. Shi Wenkang SAW Technology and Its Applications Shanghai Jiao Tong University P.R.CHINA

Prof. Shi Wenkang SAW Technology and Its Applications Shanghai Jiao Tong University P.R.CHINA

Date post:16-Jan-2016
Category:
View:230 times
Download:1 times
Share this document with a friend
Transcript:
  • SAW TechnologyandIts ApplicationsProf. Shi WenkangShanghai Jiao Tong University P.R.CHINA

  • Outline Concept Materials Mathematic Model Type of SAW Device Typical Applications Development Tendency Research on SJTU

  • What is SAW ? SAW----Surface Acoustic WaveConcept

  • Concept: What is SAW?

    Mechanical Wavepropagate in the surface Energy Concentrated in the thin layer (

  • Concept: Physical PrincipalBased on:1. Piezoelectric effect and Converse Piezoelectric effectMechanicalElectrical2. Wave reflected at discontinuity media

  • Concept: Historical Review1885 Discovery by British Physicist Releigh In Research on seismic Wave1949 Bell Lab Discovery LiNbO3 1965 Exciting SAW artificially by American Scientist R.M.White and Voltmer Using Interdigital Transducer(IDT)Since 1970s Wide Applications in Telecommunication, Radiobroadcast, TV etc.Since 1980s SAW Sensor Development

  • Concept: Advantages High Sensitivity High Accuracy Passive Wireless Digitalized Mass Production Many Application-Possibilities

  • Outline Concept Materials Mathematic Model Type of SAW Device Typical Applications Development Tendency Research on SJTU

  • MaterialsPiezo-Materials: Quartz LiNbO3 LiTaO3 LGSThe Properties SAW related: 1. Mechanical-Electronic Coupling Coefficient. 2. Temperature Related Factor ( TCF ) 3. Dielectric Factor 4. Phase Velocity 5. Yangs Model 6. Density 7. Insertion Loss 8. Elastic CoefficientDifferent Materials, Different Cut Orientation has different properties, so Optimum,Compromise Design be Needed.

  • Outline Concept Materials Mathematic Model Type of SAW Device Typical Applications Development Tendency Research on SJTU

  • Mathematic ModelForce Equilibrium EquationElectronic Charge Equilibrium EquationCristoffel Equation

  • Outline Concept Materials Mathematic Model Type of SAW Device Typical Applications Development Tendency Research on SJTU

  • Type of SAW devices

  • Outline Concept Materials Mathematic Model Type of SAW Device Typical Applications Development Tendency Research on SJTU

  • Typical ApplicationssensorDelay lineConvolverOscillator

    filter

  • Vibration and Acceleration SAW Sensor

  • Torque SAW Sensor

  • SAW Voltage Sensor

  • Flow SAW Sensor

  • SAW Gyroscope

  • 2coriolis xvFzy

  • Liquid SAW Sensor

  • Gas SAW Sensor SO2H2SCONO2H2 etc.

  • Application Examples of SAW technology in Automobile Electronic ID Smart Tire Exhaust-gas Detection

  • Electronic ID

  • Smart Tire

  • Exhaust-gas detection

  • Outline Concept Materials Mathematic Model Type of SAW Device Typical Applications Development Tendency Research on SJTU

  • New material, new technology;Suitable SAW models, suitable packaging;Intelligence, minimization, multi-function, matrixing;Industrialization.Development Tendency

  • Outline Concept Materials Mathematic Model Type of SAW Device Typical Applications Development Tendency Research on SJTU

  • Research on SJTUTheoretical work: --- Numerical method to solve Christoffe equation --- Various wave characteristics --- Optimal design --- Phase detection criterion --- Coupling mode theory

  • Research on SJTULaboratory work: --- Fabrication and test of SAW devices ID-Tag prototype Lamb wave device (measuring liquid density) --- Circuit design and implementation wireless data transmission platform for conventional sensors

  • Lamb wave liquid density sensor

  • Lamb wave liquid density sensor

  • SAW device prototype

  • Electronic Circuit

  • Schematic of transceiver circuits

  • Experiment System

  • Results Lamb Liquid DensityFrequency Response of Substrate in Two Different Conditions1Liquid-covering2No liquid-covering

  • Results Lamb Liquid DensityThe relation between the Phase Bias and Liquid Density

  • Results ID-TagMeasured impulse response vs. time of an ID-tag with bits 1111Measured impulse response vs. time of an ID-tag with bits 1011

  • SAW Pressure Sensor

  • SAW Pressure Sensor Experiment System

  • Discussion on Key ProblemsPressure sensitive coefficient distribution of substrate on (0o,90o, 0o)

  • Discussion on Key ProblemsPressure sensitive coefficient distribution of substrate on (7o,143.6o, 31.8o)

  • Projects1. [2001]G0005b.2. [2003]0107.3.LGS 60274062.4. :10304012 5.

  • Research on SJTUPublications: 1 SAW sensors and applications, Vol.20(4)1999 2 Temperature Sensitive Cuts for Surface Acoustics Wave in Quartz, Ma Weifang, Shi Wenkang, IEEE trans on UFFC, Vol.(48)1,2001 3 /2002 4 A New Member of Micro-sensor Family----SAW Sensor, Shi Wenkang, Ma Weifang, Liu Ai, International Symposium on Smart Structures & Micro-system, 2000. 5 Analysis and Design of Radio SAW ID-tagsHan Tao Shi Wenkang Wu JiahuiChinese Journal of Scientific Instrument2003.01 6 Digital Quadrature Demodulation for the Wireless SAW Sensing InformationWu Jiahui, Han tao, Shi Wenkang, Measurement & Control Technology , 2002.03 7 A Novel Wireless Measurement System Based on Surface-Acoustic-Wave DevicesHAN Tao, LIN Xiao kun, SHI Wen kangJournal of Shanghai Jiaotong University , 002.08 8 PC-DSP,Design of Communication Circuit between PC and DSP in Wireless Identification Tags System Based on SAW,,,,DENG Yong,HAN Tao, SHI Wenkang Journal of Transcluction Technology , 2001.04

  • Research on SJTUPublications:9 SAW,MA Wei fang,SHI Wen kang, Industrial Instrumentation & Automation , 2001.0310 , ,, Measurement Technique , 2001.02,Wireless Identification Tags System Based on Surface Acoustic Wave Sensors, ,,LIU Ai, MA Wei fang, SHI Wen kang, Journal of Shanghai Jiaotong University 2001.05 Liquid Density Sensor Based on Lamb Wave Technology, ,,SHI Wen kang, MA Wei fang, HOU Yi, Journal of Shanghai Jiaotong University , 2001.09 - Influence of electrical boundary conditions on lamb wave excitation at the interface of liquid and piezoelectric substrate, ,,,MA Wei fang 1,HOU Yi 1,SHI Wen kang 1,DENG Ming xi 2, Technical Acoustics , 2001.01 Acoustic Plate Mode Sensor and System design, ,,Hou Yi Shi Wenkang Ma Weifang, Instrument Technique and Sensor 2001.02 Theoretical Study on Crystal Orientation Characteristics of Lamb Wave, ,,,MA Wei-fang1,SHI Wen-kang1,HOU Yi1,DENG Ming-xi2, Piezoelectrics & Acoustooptics , 2001.02 SAW Ultra-low Power Comsumption Wireless Digital Communication Using SAW Technology, ,,LI Lei yuan,SHI Wen kang,MA Wei fang,

  • Research on SJTUPublications: Study on Novel ID-Tag System based on Surface Acoustic Wave Technology, ,,Liu Ai; Ma Weifang; Shi Wenkang, JOURNAL OF TRANSCLUCTION TECHNOLOGY , 2000.02 Research on a wireless measurement system based on SAW technology,, JOURNAL OF TRANSCLUCTION TECHNOLOGY1999.4 - Theoretical Research on Lamb Wave Excitation at the Interface of Liquid and Piezoelectric Substrate,,MA Wei fang 1,SHI Wen kang 1,DENG Ming xi 2 Piezoelectrics & Acoustooptics, 2000.06 Study on Temperature Sensitivity of Surface Acoustic Wave Devices,,MA Wei fang,SHI Wen kang,LIU PIEZOELECTRICS & ACOUSTOOPTICS , 2000.05 Study on Bulk-wave Effects in Surface Acoustic Wave Devices, ,MA Wei-fang, SHI Wen-kang, PIEZOELECTRICS & ACOUSTOOPTICS , 2000.01 A Kind of Resonance Surface Acoustic Wave Sensor, ,,Cai Ping Ma Weifang Shi Wenkang, INSTRUMENT TECHNIQUE AND SENSOR, 2000.07 The Key Technologies and Trends in Passive ID-Tags Based SAW Sensors, ,Han Tan Shi Wenkang, Journal of Transcluction Technology , 2000.04

  • Research on SJTUPublications:Tire Pressure Monitoring system Based on SAW Technology, Zhang guowei, Shi Wenkang, Ji Xiaojun, ISIST, 2002.Properties of LGS Crystal and Its Applications in High-temperature sensors, Ji Xiaojun, Shi Wenkang, ISTM,2003.Investigation of SAW propagation properties of LGS,LGT,LGN Journal of Shanghai Jiaotong university La3Ga5SiO4 temperature properties of SAW propagation in LGS, PIEZOELECTRICS & ACOUSTOOPTICSComparison Characteristics of SAW Propagation on LGT Quartz Substrates, Zhang guowei, Shi WenkangTemperature characteristics of Surface Acoustic Waves Propagating on La3Ga5SiO4 Substrates material science and technology LGSLGS piezoelectric crystal and investigation of its SAW properties PIEZOELECTRICS & ACOUSTOOPTICSQuadrature coherent detection of the wireless SAW sensor signalsjournal of Shanghai Jiaotong university

  • Research on SJTUPublications:34 Han,Tao and Shi,Wenkang, Surface acoustic wave devices based wireless measurement platform for sensors, International Symposium on Optoelectronics and Microelectronics, Vol.4601, SPIE, COEMA and Southeast University, Nov.9th Nanjing, China, 2001 pp14-19Han,Tao and Shi,Wenkang, Review of passive and telemetric surface acoustic wave sensors and system, International Conference on electronic Measurement & Instruments, ICEMI2001, Nov. 20th , Guilin, China pp446-449 Han,Tao Shi,Wenkang Reflection of impedance loaded SAW IDT and its application in wireless information transmission of sensors (Accepted by Chinese Journal of Elec

Popular Tags:

Click here to load reader

Embed Size (px)
Recommended