Jul 20, 2023
Successful ultrasonic welding connection for space application
In 2018, we reported on the significant role of ultrasonic welding technology in the manufacturing of the CLARA radiometer for the Norwegian nanosatellite NorSat-1. Today, we are pleased to provide you with an update on the current operational status of the instrument.The CLARA radiometer, developed by the Physikalisch-Meteorologisches Observatorium in Davos (PMOD/WRC), is a remarkably lightweight and compact device for measuring the total solar irradiance (TSI) in space. With high accuracy and long-term stability, it can measure temperature differences resulting from absorbed solar radiation.
The production of such a measurement setup, which reliably detects the smallest deviations in TSI under space conditions, poses some challenges. One of them was to find a suitable joining technique for connecting the small, 0.13mm thick cavities to the thermal resistors.
After extensive testing, the torsional ultrasonic technology by Telsonic was ultimately chosen. This method enables a firm and mechanically stable connection that can withstand high vibrations. The torsional motion of the sonotrode introduces only minimal vibrations around the weld seam, thus protecting sensitive components and surfaces.
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