On Saturday, October 14, The Silesian University of Technology held its 12th edition of Scientific Night - The Art of Science. I participated the art of science and showed some scientific experiment.
The NeoStrain families also participated in science night activities. NeoStrain came with a crack measurement scale and snow monitoring system. And we had a demonstration of body weight application by using two strain gauge sensor in the bridge and detecting the speed of the hitting to the board application using the accelerometer.
The speed of the hitting on the Board application:
We can detect the speed of the ball throwing on some object using basic physic of Accelerometer.
Speed or velocity comprises of two things if some objects travel at a known distance in a known amount of time this is known as velocity.
So acceleration is how much something increases has velocity over time.
We have used HS-100 Accelerometer from Handsford Sensor and it was plugged into the throwing board (picture below). And if someone throws a ball into the board our application can detect the speed of hitting. And the application was written in LabVIEW.
Body weight application:
We can measure the weight of the person by using basic physic of Strain Gauges.
In principle Strain Gauges are simple devices consist of thin PCB or carrier with copper traces. This thin PCB is sensitive to all kind of forces and if we stick such a strain gauge in a metal bar and apply forces to the metal bar the resistance of the copper traces will increases or decreases depending direction of the forces. But the distances this gauges are minimal if the forces are small. So we have used some tricks like using two or more gauges to see the voltage changes. So now we have sensors to measure forces not weight. Sir Isaac Newton discover a way to convert force to weight. But still, to measure the weight in a long bridge we need a very sensitive analog to digital converter with the amplifier. And NeoStrain made this amplifier which we used in this application to detect the weight of the person in the bridge. And again the application was written in Labview.
Amplifier with ADC
Load test in wooden bridge till it was broken!
End!@ Me in front of the bridge
Hope you enjoy the reading and bye-bye till next writing~!!