1. All the equipment in the factory is not tested by the diagnostic object, but depends on the production characteristics of the factory and the importance of the equipment itself.
2. Equipment state parameters are the carrier of equipment abnormality and fault information. Selecting the best measurement point and adopting appropriate detection methods are important conditions for obtaining effective fault information. The key to the normal operation of diagnosis is to truly and fully detect a sufficient number of state parameters that can objectively reflect the equipment situation
3. Therefore, the correct selection of measurement points is related to whether the fault can be diagnosed correctly. Once the measurement points are selected, they should be marked to determine the measurement points and direction. The principle is to comprehensively describe the vibration state of the equipment, and select the sensitive points of equipment vibration, the key points closest to the core of the equipment and the vulnerable points prone to deterioration as far as possible.
4. In addition, environmental factors should also be considered. Avoid selecting places with high temperature, high humidity, air outlets and sharp temperature changes as measurement points to ensure the accuracy of measurement data. The measurement points should be as close to the bearing area of the bearing as possible, and avoid multi-layer separation from the detected moving parts as far as possible, so as to reduce intermediate links and attenuation during the transmission of vibration signals. For low-frequency vibration, Radial horizontal and vertical directions must be measured at the same time, and axial measurement points should be added if possible. For high-frequency random vibration and impact vibration, only one direction can be determined as the measurement point.
