Measuring, Logging, and Visualizing Pulsed Electromagnetic Fields Combined with GPS Location Information

Diode detectors and thermocouple detectors are the standard sensors for measuring electromagnetic fields. Thermocouple detectors are most suitable for detecting average values of pulsed signals. In case of peak detection of the field strength, the thermocouple detector is too slow and diode detectors have to be used. In case of a large crest factor, e.g. with a radar, a cascaded diode detector is needed, which is not available as a standard exposure electromagnetic field strength probe. Furthermore, a continuous registration of location while doing measurements is added. This paper describes a data acquisition (DAQ) system built in LabView(lv), which displays and logs the data of a cascaded diode-based wideband power sensor and a GPS sensor in a synchronized way. The LV program also displays the power sensor parameters and the associated GPS location in a heads up display (HUD) using the Microsoft HoloLens. This allows the user to walk and see the measured data in augmented reality without the need to look down on a laptop and missing the maximum measured electric field strength. This reduction in delay occurring from human reaction time allows to follow measurements more accurately in real time. The built system is convenient, compact and mobile in usage and can be used for compliance testing with the health and safety requirements for workers or the general public of radiated electrical fields in difficult to reach areas without compromising safety regulations.