Industrial Production Safety Research Articles

A Novel Flow Regime Identification Based on PCA Feature Extraction and ELM Networks in ERT System

Two-phase flow exists widely in industrial production process. On-line intelligent identification of flow parameters plays an increasingly important role in the industrial production safety. Among flow parameters, the identification of flow regimes is especially important and valuable for industrial processes control. To satisfy the on-line identification, it is necessary to reduce time consuming in training and recognition phase. In the paper, the parameters measurements are implemented in Electrical resistance tomography (ERT), which is a process tomography technology based on electrical resistance sensing mechanism. A new identification method is proposed using PCA feature extraction and Extreme learning neural networks. Simulation was carried out for typical flow regimes core flow, laminar flow, circulation flow and trickle flow. The results show its feasibility. In order to prove its advantage in improving speed, running time using back propagation and support vector machine algorithms are compared with extreme learning machine. The experiments results indicate that this method significant reduces time consuming in training phase.

Fatigue Strength and Modal Analysis of Bogie Frame for DMUs Exported to Tunisia

The equivalent stress at key positions of Bogie Frame for DMUs Exported to Tunisia is obtained by using simulation analysis. The evaluation of static strength and fatigue strength is checked referring to UIC specification and Goodman sketch for welding materials. In addition, the modal analysis of the frame is made, and the vibrational modal of frame in given frequency domain is predetermined to evaluate the dynamical behavior of the frame in order to meet the dynamical design requirements. The results show that the key points of the calculated frame of the equivalent stress are less than allowable stress, and thus it could provide a theoretical foundation for the optimized design of frame structure and safety of industrial production.

Non-Destructive Characterization of Welding Defects Using MMM and ACFM Methods

Nondestructive inspection and evaluation of welds is very important to ensure the safety of industrial products. In this study, the metal magnetic memory (MMM) and alternating current field measurement (ACFM) methods are utilized to characterize welding defects of a butt welded tubular specimen respectively. The results show that the MMM method has potentials in evaluating both early stress concentration and macro-defects but only qualitatively, while the ACFM method can provide crack depth sizing information quantitatively, suggesting that the two methods should be combined for nondestructive evaluation welding defects to improve the detection efficiency and accuracy.

The Design and Implementation of Construction Site Safety Supervisory System Based on the Internet of Things

According to the present situation that China's construction site safety supervision of the development toward informatization, this essay put forward a kind of construction site safety supervisory system based on the internet of things through the introduction of wireless network. At first, combined with the requirements of government and industry, we have analyses the requirements of building construction site for safety supervision. Then combined with the difference between architecture construction site and industrial production safety supervision, referring to the existing industrial video safety supervision system, we put forward the structure of the construction site safety system based on the internet of things. At last, we have also analyses several problems about the contracture of network nodes which should be valued. Wireless network can be better adapted to the changing characteristics of construction site safety supervisory operation, and this will promote effectively the development of safety supervision toward the direction of informationization.

Assurance of Reliability and Safety of Industrial Products with Shorter Development Period

Assurance of Reliability and Safety of Industrial Products with Shorter Development Period

A Map for Assurance of Reliability and Safety of Industrial Products

A Map for Assurance of Reliability and Safety of Industrial Products

Fire resistant composites for upholstery

The problem of flammability and relevant method of examination of upholstered furniture has been the subject of research interest since many years. This resulted in a significant progress in the manufacture of upholstery materials both covering and barrier ones as well as fillings. As a result of the studies performed, it has been established that flammability of upholstered furniture depends not only on the furniture components, but also on assembling, as well as on structural and finishing materials. At the Institute of Natural Fibres (INF), upholstered chairs were designed for cinemas, theatres and conference rooms, following the European Union requirements concerning safety of industrial products. The above upholstered chairs are distinguished not only by their modern design line and functionality, but also by increased fire resistance. The choice of decoration, barrier and filling materials was performed by giving preference to safe materials which do not emit hazardous substances while used. In alternative designs of upholstery composites, differences in softness of seat and backrest were taken into account and materials were chosen in such a way that upholstered chairs for particular purpose provided maximum comfort.