The results showed movements in the range of up to 1 m at the top of the tower.
Time series of displacement measurements for areas at different heights of the tower were analyzed and compared to reference measurements acquired by processing video camera recordings and total station measurements. We used an automotive-grade, low-cost, off-the-shelf MIMO-SAR sensor operating in the W-band with an acquisition frequency of 100 Hz to derive Line-Of-Sight (LOS) deformation measurements in ranges up to about 175 m. We investigated whether Multiple-Input Multiple-Output Synthetic Aperture Radar (MIMO-SAR) sensors can be used to monitor wind turbine towers. The majority of sensors used for this purpose are costly and require in situ installations. The health of such structures is thus assessed by monitoring. It works extremely well and is simple to use.Deformations affect the structural integrity of wind turbine towers. Overall this is a great digital-to-analog converter box. The one thing I do not like about this converter box is it's program guide, it only displays the current program information and the upcoming program information. The tuner is very sensitive, it can pick-up very weak signals that other converter boxes miss. What really makes this converter box stand out above the rest is it's high quality tuner. Many other converter boxes use a cheap wall transformer for power. The power cord plugs directly into a wall outlet because it has it's own built-in power supply. The picture quality is very good, the image looks clean and sharp. I have used this converter box for more than a year and I have not experienced any problems with it. The Zenith DT900 Digital-to-Analog Converter Box it is one of the best purchases I have ever made. True Whats Zeniths stand on defective Dtt901 converter box's It lasted me years before I gave it to a friend and got satellite. The remote was so cute I loved it, when I could keep ahold of it! I was very skeptical about switching to digital TV but with the Zenith box, I came to love it! No more fuzzy channels! I would recommend this one over any of the others. I liked the way their menu was set up and it was very smooth functioning. I miss it and wish I would have not given it away and just bought one for my friend instead! This box had the buttons on it where I could change the channel when I couldn't find the remote (which was unfortunately quite often). We switched over antennas and WOW this new TV looked amazing and best of all it was free! We picked up tons of channels from different, surrounding states even. We had a lot of problems getting reception at first but concluded it was our antenna, not the box. This was the first converter box my family got after the switch.
0 kommentar(er)
