A production status monitoring method based on edge computing is proposed for traditional machining offline equipment to address the deficiencies that traditional machining offline equipment have, which cannot automatically count the number of parts produced, obtain part processing time information, and discern anomalous operation status. Firstly, the total current signal of the collected equipment was filtered to extract the processing segment data. The processing segment data were then used to manually calibrate the feature vector of the equipment for specific parts and processes, and the feature vector was used as a reference to match with the real-time electric current data on the edge device to identify and obtain the processing start time, processing end time, and anomalous marks for each part. Finally, the information was uploaded to further obtain the part processing time, loading and unloading standby time, and the cause of the anomaly. To verify the reliability of the method, a prototype system was built, and extensive experiments were conducted on many different types of equipment in an auto parts manufacturer. The experimental results show that the proposed monitoring algorithm based on the calibration vector can stably and effectively identify the production information of each part on an independently developed edge device.

High speed train interior structural noise which caused by vibration of car body panels influence passengers ride comfort directly. The car body panels’ acoustic contribution analysis can determine the location of the panels which affect considerably the interior structural noise. Then that modifying the car body panels with a clear aim can improve the vibration characteristics of car body panels to reduce the interior noise. Using acoustic transfer vector method, the car body panels’ acoustic contribution of the high speed EMU were analyzed to determine the location of the panels which affect considerably the interior noise.

The structural properties of automobile door have important influence on the safety and reliability of the vehicle. In order to obtain the actual working vibration characteristics of vehicle door, firstly, according to the complex condition, sensors arrangement scheme was determined based on the vibration mode characteristics of the door system that under force hammer excitation; secondly, a car door on-line vibration measurement system was built; then, vibration measurement test was done under level load, pavement with a reduction bar and macadam pave conditions. Results show: The system can measure the door vibration signal in real time and realize the signal frequency characteristics analysis.