TY - THES

T1 - Research and Development of a Telemetry System for Condition Monitoring of Machines Using Sub-GHz Frequency Bands

AU - Peterseil, Philipp

N1 - no embargo

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - Telemetrie

KW - Zustandsüberwachung

KW - Sub-GHz

KW - IIoT

KW - ISM

KW - SRD

KW - Telemetry

KW - Condition Monitoring

KW - Wireless Sensor

KW - IIoT

KW - Sub-GHz

KW - ISM

KW - SRD

KW - Smart Sensor

M3 - Master's Thesis

ER -