Linear position sensors are available with a variety of different output signal types to suit various application requirements and control architectures. Let’s take a look at three of the most common output signal types for linear position sensors; 1) analog, 2) time-based digital, and 3) serial digital, and discuss some of the pros and cons of each.
Many sensors used in industrial automation applications – linear position sensors and long-range distance sensors being two of the most common types – produce an analog output that is representative of the position or distance being measured.
Many distance measurement sensors – regardless of the front-end sensing technology employed – deliver an analog output such as 0-10V or 4-20mA. A key parameter to understand for any distance measurement sensor is the output resolution. In a position measurement system, resolution is defined as: