Engine Monitoring Accelerometers Accelerometers Speed Dynamic Pressure Power Temperature Fluid Condition Figure 5. Generalized structure of the monitoring system for the gas turbine aviation engine based on wireless data transfer from autonomous sensors (https://www.smsystems.com.au/more-and-smarter-sensors-are-coming). line, autonomous meteorological observation sites, navigation devices, spaceship and submarine equipment. On the other hand, rapid development of microelectronics triggered the design and implementation of film and semiconductor technologies to fabricate novel low-power TEGs for energy sources of portable, airborne and mobile hardware described below. IEEE CASS Chapter Contributions Monitoring System TH TEG TC System on Package Energy Harvester Rsens Sensor and Conditioning Circuit Figure 6. General structure of the sensor unit of an autonomous monitoring system powered from a thermoelectric generator, where TH - hot side temperature; TC - cold side temperature; VO - TEG output voltage; VOUT - device supply voltage; Rsens - resistance of sensitive element. 60 IEEE CIRCUITS AND SYSTEMS MAGAZINE VO Voltage Converter dc/dc Vout RF Transmitter/Receiver The recent research based on the results of Ioffe's scientific group are further developed by academic institutions and universities. Several research projects are carried out by the members of IEEE CASS Chapter, St. Petersburg at Peter the Great St. Petersburg Polytechnic University aimed at developing TEGs to monitor objects state. The structure of gas turbine aviation engine based on wireless data transfer from autonomous sensors is presented in Fig. 5 as an example. Power supply of sensor units is carried out by means of TEGs. General structure of an autonomous monitoring sensor node is presented in Fig. 6. It includes the radio frequency transmitter-receiver and its own sensor powered by a system-on-package energy harvester based on thermoelectric generator and DC/DC voltage converter. TEGs can be classified into two manufactured types: bulk and thin-film devices. Thin-film TEGs are generally manufactured using THIRD QUARTER 2021https://www.smsystems.com.au/more-and-smarter-sensors-are-coming