Power supply for wireless sensors systems
  • 来源:深圳大学物理与能源学院
  • 发布者:学院办公室
  • 发布时间:2018-10-10 15:26:32
  • 浏览次数:17
  • 报告主题:Power supply for wireless sensors systems

    主讲嘉宾:Leonhard Reindl,德国弗赖堡大学教授

    时    间:2018年10月17日上午9:30-11:30

    地    点:深圳大学南区物理光电楼1206会议室



              Wireless sensor or actuator systems, like portable phones, remote control, ID cards, or embedded wireless sensor nodes play an ever growing role in our industrialized environment. Those systems and many more were enabled due to the steady decreasing power consumption of high integrated ICs. Most such systems are powered by batteries or inductive coupling. In this presentation several concepts for an alternative power supply of wireless sensor or actuator systems are discussed in detail. Batteries, although today mostly used, suffer from a limited storage capacity, which induce a labor and sometimes cost-intensive periodic maintenance, and a problematic eco logical impact.

            For inductive coupling systems operating in the near field is the usable range limited to a distance of about the aperture of the coupling coil. UHF systems operate in the far field and reach higher distances. Their operating range is limited by the distance where the voltage at the feeding point of the antenna becomes too low to drive the rectifier circuit. Larger read out ranges become feasible by omitting the rectifier stage. In this case we need either a passive frequency modulating device to shift the read out signal to a side band, or a resonator with a high quality factor, like a SAW, BAW, or a dielectric resonator, to store the energy until all environmental echoes are fade away. For many applications, both indoor and outdoor, energy harvesting system become feasible which convert ambient power densities like light, RF fields, local or temporal thermal gradients, or mechanical vibrations into electrical supply power for the wireless system.

            All those systems strongly suffer from a lack of energy. Thus new concepts for lowering the power consumption of a wireless sensor or actuator system - by keeping their features - remain extreme important. Herby, a wireless wake up receiver technique is presented which operates on a current requirement as low as 3 micro A.

            Several application examples of the presented systems will be given, e.g., sensors for industry 4.0, indoor position sensors, inductively transmitted power to implants, and high temperature wireless sensors.


        Leonhard Reindl received the Dipl. Phys. degree from the Technical University of Munich,               
               Leonhard Reindl is senior member of the IEEE and the German VDE. Since 2014, he is serving as Editor-in-Chief for the Section 'Sensor Networks' of the open access journal Sensors. He serves in the Technical Program Committees of IEEE Frequency Control Symposium, IEEE Ultrasonic Symposium, Eurosensors and of the German Biannual Symposium "Sensoren und Messsysteme", where he 3 times served as general chairman. He also served for the European Security Research and Innovation Forum ESRIF, as editor for IEEE Transactions UFFC and in the Administrative Committee AdCom of the IEEE UFFC society from 2005 to 2007 and from 2009 to 2011.
    Leonard Reindl holds more than 40 patents on wireless passive sensors and has authored or co-authored more than 450 papers in this field. His citation index according Google Scholar is 6800 and his h-index according Google Scholar is 41.