Research and Development of a Telemetry System for Condition Monitoring of Machines Using Sub-GHz Frequency Bands

Philipp Peterseil

Research output: ThesisMaster's Thesis

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Abstract

This thesis presents the conception, implementation and test of a condition monitoring system using sub-GHz frequency bands. The results from performance testing on a complete prototype system are also presented. The Wireless M-Bus network protocol has been selected and implemented; this provides a standardized and established interface. The battery powered smart sensor was designed as an embedded system featuring a low-power wireless microcontroller together with an accelerometer. An Industrial PC (IPC), with IEC 61131 certification, was selected as the edge device. This device includes a Wireless M-Bus extension module. The range was evaluated using omnidirectional aerials. At a transmission power of 14dBm, corresponding to a current consumption of 6.5mA, ranges up to several hundred meters were achieved; there is, however, a dependency on obstacles that are projecting into the fresnel zone. The main influence in long-term mean current-consumption and therefore life of battery, was identified as the current consumed in low power deep sleep mode. Assuming a typical application measuring 1600 samples at a rate of 3200Hz once each hour and transmitting data at an interval of six hours leads to a life of battery estimation of about two years. These results confirm that sub-GHz frequency bands are well-suited for condition monitoring purposes with moderate data rate demands.
Translated title of the contributionEntwicklung eines Telemetriesystems zur Zustandsüberwachung von Maschinen, basierend auf den Sub-GHz Frequenzbändern
Original languageEnglish
QualificationDipl.-Ing.
Awarding Institution
  • Montanuniversität
Supervisors/Advisors
  • O'Leary, Paul, Supervisor (internal)
Award date25 Oct 2019
Publication statusPublished - 2019

Bibliographical note

no embargo

Keywords

  • Telemetry
  • Condition Monitoring
  • Wireless Sensor
  • IIoT
  • Sub-GHz
  • ISM
  • SRD
  • Smart Sensor

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