Cantilever type displacer is made of elastic sensitive elements, and energy storage springs made of elastic sensitive elements are used to drive electrical contacts to complete the conversion from gravity change to electrical signals. It is widely used in high-end smart phones and tablet computers.
The gravity sensor works on the principle of the piezoelectric effect.
The so-called piezoelectric effect is "except for the deformation of the crystal by the external force applied to the heteropolar crystal without a symmetrical center, the crystal will also change the polarization state of the crystal and establish an electric field inside the crystal. The phenomenon that polarizes a medium is called the positive piezoelectric effect. "
The gravity sensor uses the characteristics of crystal deformation caused by acceleration in its interior. Because this deformation generates a voltage, as long as the relationship between the generated voltage and the applied acceleration is calculated, the acceleration can be converted into a voltage output. Of course, there are many other ways to make acceleration sensors, such as the capacitive effect, thermal bubble effect, and light effect, but the most basic principle is that a certain medium is deformed due to acceleration, which is measured by the amount of deformation and converted into Voltage output.
The gravity sensor is a device pioneered by Apple Inc. It is now used on the iPhone and ipod-nano4. The simple point is that you originally held the phone upright in your hand. You turn it 90 degrees and cross it, and its page automatically follows your center of gravity, which means that the page has turned 90 degrees. , Very humane.