Final answer:
In an industrial fan maintenance system, the sensor typically detects and measures vibration levels to monitor the condition of the fan and prevent potential failures. Other parameters that may be monitored include blade speed and power consumption.
Step-by-step explanation:
In an industrial fan maintenance system, the type of physical change that a sensor might detect, measure, and transmit data on is vibration. Sensors are crucial in monitoring the condition and performance of machinery, and vibration analysis is a key aspect of predictive maintenance. Excessive vibration in a fan could indicate issues such as imbalance, misalignment, or bearing wear. By detecting vibration levels, the sensor can provide early warning signs of potential problems, allowing for maintenance before a serious failure occurs.
While vibration is one key parameter, sensors might also monitor other aspects like blade speed, power consumption, temperature, and, in some cases, wind direction. However, in the context of an industrial fan used within a facility, wind direction is less likely to be relevant compared to other types of fans, such as those for wind turbines. In these systems, blade speed indicators would be essential for optimal power generation, the power sensors would ensure efficient energy use, and wind direction sensors might be used in wind turbines to align them properly.