Accelerometer Sensor: A Brief Rundown
If you are looking for a device that can measure acceleration and vibration, the damping of active vibration or monitor transport, then an accelerometer sensor is what you need. Accelerometer sensors are more common than you might think and there is no doubt that you have been around one and made use of one (even subconsciously) many times in your life.
In order to give you a better idea of what an accelerometer is and where you might have encountered one previously, we will discuss the definition, application, and types of accelerometers.
What is an Accelerometer?
An accelerometer, also known as an acceleration sensor, doesn’t just measure any type of vibration or acceleration, it is specific to the motion of a structure. It can measure the acceleration of single or multiple axes, including one, two, or three axes at a time.
Fundamentally, an accelerometer measures the forces of acceleration that are acting on or impacting an object or structure. This measurement allows the device to deduce the location of the object and monitor its motion and movement from thereon.
Most of the accelerometers available today are based on MEMS (Micro-Electro-Mechanical Systems). This technology allows for accelerometers to be minuscule as well as affordable.
Types of Accelerometers
There are three types of accelerometers, each suited to different applications. These types consist of:
- Capacitive Accelerometer: These accelerometers are very common and make use of changes in the electrical capacitance to determine the acceleration of an object.
- Piezoelectric Accelerometer: These accelerometers detect a change in acceleration by making use of and sensing the piezoelectric materials that produce electricity when they are subjected to physical pressure. This method of detection is also known as the piezoelectric effect.
- Piezoresistance Accelerometer: This accelerometer performs its measurements based on force and resistance. It also increases its resistance in order to be equal to the amount of pressure that is being applied. It is known to be less sensitive than a piezoelectric accelerometer.
Where is the Accelerometer Sensor Used?
Accelerometers are widely used in a variety of objects and devices. Some of these devices include:
- Wind Turbines: Today’s wind turbines require an accelerometer to monitor the movement and sway inflicted on their mast by the wind. In reaction to this, the blades shift and “feather” in order to create stability.
- Cars: Often coupled with airbags, accelerometers measure the force that is applied onto the car which triggers a chain reaction that releases the airbags within a car.
- Cell Phones: Most smartphones of today contain an accelerometer. This is what allows your phone to track your steps, or flip its screen from landscape to portrait.
Contact us at ATI Systems to find out more about our range of accelerometers and which one would be best suited to your requirements and application.
