This change in voltage reading corresponds to the shear force between the block and the box. In this case, if you decide to give the box a good shove, you might notice a change in the voltage reading. The corresponding wires are attached from the piezo plate to a multimeter. Now, suppose that the cement between the block and the inside surface of the box is replaced with a shear mode piezoelectric plate to sense the shear force. However, if that block was firmly cemented to the inside surface of the box, the block would never slide regardless of the rate of acceleration. This is because both the box and the concrete block have inertia and resist changes in their movement accordingly.Īs the box accelerates, the inside surface exerts a shear force against the surface of the concrete block thereby causing the block to move with the box - unless the shear force exceeds the maximum force allowable due to friction.
If that person pushes and accelerates the box quickly enough, the concrete block inside the box might slide. Now, imagine that somebody gives that box a generous push. For illustrative purposes, imagine a wooden box with wheels and a concrete block inside. Contact APC Today Principles of OperationĪn accelerometer is a type of sensor that measures force due to acceleration of the sensor. No matter if you need to produce large volumes of customized piezo sensors, customized experimental devices in small quantities, or sensors for university and private research, it’s important to start with the right types of quality components. Choose from standard piezoelectric sensor component options, as well as customized solutions based on your specific needs. If you’re looking to build a piezoelectric accelerometer that suits your specific needs and specifications, precision-manufactured piezoelectric accelerometer components can help.