A8.4 - Test Method for Narrowband F/TDMA-based Wireless Sensor/Actuator Networks

Tm - Technisches Messen

et al. 2018

Zusammenfassung Dieser Beitrag beschreibt Messungen zur Charakterisierung einer Modenverwirbelungskammer vor dem Hintergrund der Qualifizierung von drahtlosen Sensor/Aktor-Modulen. Aufbauend auf Normen bzw. Testempfehlungen, die für andere drahtlose Anwendungen entwickelt wurden, wird in diesem Beitrag das Verhalten einer Modenverwirbelungskammer unter verschiedenen Beladungen und jeweils verschiedenen Modenrührersequenzen speziell für den Test von drahtlosen Sensor/Aktor-Modulen in industriellen Indoor-Umgebungen untersucht. Im Abschluss wird unter Abwägung der Wirtschaftlichkeit eine Konfiguration der Modenverwirbelungskammer für entsprechende Testmessungen vorgeschlagen.

Charakterisierung einer Modenverwirbelungskammer als Testumgebung für drahtlose Sensor/Aktor-Module

Tm - Technisches Messen

et al. 2018

IO-Link Wireless enhanced factory automation communication for Industry 4.0 applications

et al. 2018

J. Sens. Sens. Syst.

Abstract. In the context of the Industry 4.0 initiative, Cyber-Physical Production Systems (CPPS) or Cyber Manufacturing Systems (CMS) can be characterized as advanced networked mechatronic production systems gaining their added value by interaction with the ambient Industrial Internet of Things (IIoT). In this context appropriate communication technologies and standards play a vital role to realize the manifold potential improvements in the production process. One of these standards is IO-Link. In 2016 more than 5 million IO-Link nodes have been produced and delivered, still gaining increasing acceptance for the communication between sensors, actuators and the control level. The steadily increasing demand for more flexibility in automation solutions can be fulfilled using wireless technologies. With the wireless extension for the IO-Link standard, which will be presented in this article, maximum cycle times of 5 ms can be achieved with a probability that this limit will be exceeded to be at maximum one part per billion. Also roaming capabilities, wireless coexistence mechanisms and the possibility to include battery-powered or energy-harvesting sensors with very limited energy resources in the realtime network were defined. For system planning, setup, operation and maintenance, the standard engineering tools of IO-Link can be employed so that the backward compatibility with wired IO-Link solutions can be guaranteed. Interoperability between manufacturers is a key requirement for any communication standard, thus a procedure for IO-Link Wireless testing is also suggested.

Test method for narrowband F/TDMA-based wireless sensor/actuator networks including radio channel emulation in severe multipath environments

et al. 2018

J. Sens. Sens. Syst.

Abstract. A test method for narrowband wireless sensor/actuator networks is presented, facilitating affordable and efficient performance and compliance tests prior to the deployment of the wireless communication systems. Commonly used channel models are examined to derive a worst-case test scenario. Employing frequency/time division multiple access (F/TDMA) techniques and protocol synchronization, a new and efficient test method is suggested, where the equipment under test (EUT) is evaluated under the worst-case scenario. A cost-efficient channel emulator is introduced to emulate fading in multipath environments. Also, industrial interferes can be included in the setup. Furthermore, a procedure to test wireless devices with integrated, non-detachable antennas is presented.