Introduction
When it comes to measuring vibrations and accelerations, two devices commonly used are the accelerometer and vibrometer. Many people confuse these two devices, but they have different functions and serve different purposes. In this article, we will discuss the differences between accelerometer and vibrometer, and when each of them is used.
The Definition of Accelerometer
An accelerometer is a device that measures and detects the vibration or acceleration of an object. It measures acceleration in three-dimensional planes (X, Y, Z) and is commonly used to detect movement, vibrations, and changes in orientation of an object. The device generates an electrical signal that represents the magnitude and direction of the acceleration.
The Definition of Vibrometer
Vibrometer, also known as a vibration meter, is a device used to measure the vibration or frequency of a system, component, or structure. It is used to measure vibration in structures, engines, motors, and other machinery. A vibrometer measures both amplitude and frequency of the vibrations, as well as its direction and phase shift.
When to Use an Accelerometer
Accelerometers are typically used in environments where there is a need to measure high frequency, short duration vibrations. It is commonly used in the aviation, automotive, and consumer electronic industries. Accelerometers can be used to monitor vibration levels in aircraft engines, detect movement in portable electronics, and measure the impact of a collision in a car.
When to Use a Vibrometer
Vibrometers are commonly used in industries where machinery produces vibrations. It is commonly used in manufacturing, construction, and transportation industries. Vibrometers are used to detect vibrations in engines, machine tools, bearings, turbines, and other industrial equipment. It can also be used to identify areas of wear or strain in a structure or machine.
The Measuring Principle
The accelerometer measures acceleration by detecting changes in capacitance, piezoelectric crystals, or resistance. On the other hand, a vibrometer measures vibration by using a laser or other optical system to detect the change in position of the vibrating object relative to a fixed reference point.
The Type of Data Transmitted
Accelerometer usually transmits voltage, current, or analogue signals that are proportional to the acceleration. Vibrometer, on the other hand, transmits digital signals that correspond to the vibration frequency, amplitude and phase-shift.
The Accuracy
The accuracy of the accelerometer usually depends on its measurement range and the sensitivity of its material. Accelerometers have a high-accuracy rate and can measure small changes in acceleration. Vibrometer accuracy, on the other hand, depends on its measurement range, the speed of measurement, and the resolution of the sensor. Vibrometers have a high-accuracy rate for measuring vibrations over broad frequency bands.
Costs
Accelerometers are generally cost-effective, and simpler devices are widely available for consumer use. Vibrometers, on the other hand, are more expensive and more specialized devices. The cost may vary depending on the application and purpose of the device.
Calibration and Maintenance
Both accelerometers and vibrometers require calibration and regular maintenance to ensure accuracy and longevity. Calibration procedures can differ between different models and manufacturers. It is recommended to consult with the manufacturer or qualified personnel to obtain the most accurate calibration instructions.
Conclusion
While accelerometers and vibrometers serve a similar function, they have different applications in various industries. Accelerometers are typically used to detect motion and short-term vibrations, while vibrometers are more commonly used in the industrial, manufacturing and construction industry. It is important to understand the differences between the two devices in order to select the appropriate one for your specific needs.