Small movements, huge precision
We do love our LEGO and all of its possibilities, but if you are only interested in the numbers, please see below.
This is not a wind turbine tower, but the movements are similar to the normal operation of one.
Here you see one of the SHM01 nodes going for a ride on the custom build car to the left together with the readings from the node on the plot to the right. For size and scale pay attention to the LEGO-workers in the background or the ruler next to the front wheels. This car will never go into production, as you can see it is pulling a little to the left.
Pay close attention and our expert LEGO-workers will tell you that the plot shows a longitudinal movement of 19.98 mm with a small turn to the left of 0.98 mm. Try yourself to get the readings from the ruler or timing the 3.23 seconds, 0.31 Hz, journey between outer positions.
SHM01 – Accuracy
The three plots display movements of approximately +/- 1 mm at frequencies of 0.05 Hz, 0.1 Hz, and 0.2 Hz. The y-axis represents displacement in millimeters, while the x-axis indicates time in seconds. The blue line represents data calculated from geophone measurements, and the orange line depicts data from a high-precision laser.
Click the graph to view
About the graph: Comparison of SHM01 and High-Precision Laser Measurements – This graph compares the displacement measured by the SHM01 geophone and a high-precision laser at low frequencies, showcasing the accuracy of SHM01 in capturing subtle movements.
SHM01 –Signal to Noise
This table displays the impressive capabilities of the geophones across different frequencies. It details the maximum displacement of the geophone as a function of frequency, illustrated in terms of acceleration, velocity, and displacement.
Click the table and graph to view
About the table: Dynamic Range and Noise Levels of SHM01 – This table outlines the dynamic range and noise levels associated with SHM01, illustrating its robust performance across various conditions.
About the graph: Maximum Displacement vs. Frequency for SHM01 – This graph illustrates the maximum displacement capabilities of the SHM01 geophone across various frequencies, demonstrating its effectiveness in environments with different dynamic characteristics.