The application of the acousto-electronic SAW sensors in the industrial Internet of things facilities monitoring

Leontiev V. V., Sorokin A. V., Nenashev V. A., Wattimena G. M.

This paper examines the application of the passive SAW sensors in industrial IOT systems. Modern industrial multisensor monitoring systems interrogate sensors of various physical quantities. Automatic monitoring systems should simultaneously interrogate several sensors in order to make received data more informative. It also improves the ability to timely response to emergencies. The number of monitored facilities could be large. The further the sensors interrogation should be wireless. The development of Industrial IoT systems based on SAW sensors is limited due to the problem of a signal collision that occurs during simultaneous interrogation under industrial noise conditions. The paper considers the designs and physical principles of passive acousto electronic sensors. It is shown that existing radio-frequency automatic and semi-automatic control systems built on the passive acoustoelectronic identification tags can use sensors whose response signal contains information about the physical quantities (temperature SAW sensors). The paper discusses the possibility of simultaneously reading the various types of passive acoustoelectronic sensors (temperature, humidity, tension) under conditions of the high probability of collision case.

Keywords:acousto-electronic devices, IIoT, monitoring systems, SAW, magnetic impedance, sensors, RFID, SAW tags