Applied Mechanics and Materials Vols. 303-306

Abstract: In order to measure the humidity and temperature of coal mine accurately, design uses low power microprocessor MSP430F2274 as control chip in this system, data acquisition by digital temperature and humidity sensor SHT11, taking nRF905 as the core of the RF module for wireless transmission, measurement results by LCD display and transfer to PC through CAN bus at the same time. To solve the traditional way of measuring precision is low, cable transmission system needs to be at the measurement site layout of the large number of wires and cables, and the circuit for transmitting signals can be affected by electromagnetic interference problems, ensure the reliability of the measurement results. The design has given the hardware circuit diagram and data flow chart.

Abstract: The interaction between the pump and pump, the signal and signal ,the pump and signal in Fiber Raman amplifiers are measured. Three-wavelength pumping at 1427nm, 1445nm and 1466nm, it show that the pump energy transfers from short wavelength to long wavelength, that is, Raman effect exists between the different pumping lights. When the different wavelength signals input at the same time, the output optical power change, which is also caused due to the Raman interactions between different signals. When three-wavelength pumping, the input signal power, respectively 0.03dBm 5.04dBm 15.08dBm, the signal gain values are measured. A significant gain saturation phenomenon in 15.08 dBm appears, and it will intensify as the power increases.

Abstract: Floor slipperiness assessment was conducted in a food factory in northern Taiwan. Three areas in the popcorn sector of the factory were measured. The friction measurements were conducted using the Brungraber Mark II slipmeter. A total of 96 measurements of the coefficient of friction on the floor were conducted. In addition, six employees were interviewed concerning their experiences of slipping and falling in the sector and their perception of floor slipperiness. The results showed that all the readings in the measurement areas were lower than 0.5, a safety standard commonly adopted in the USA. All the interviewees reported that they had the experiences of slipping without falling in the sector. All of them reported the floor in the popping area was “extremely slipperiness.” Ergonomic interventions are required and in this sector.

Abstract: Friction measurements in the field were conducted in twelve restaurants in Taiwan. Four restaurants for each of the Chinese style, western style, and western style fast food restaurant were visited. The Brungraber Mark II slipmeter was adopte to measure the coefficient of friction (COF) in three areas in each of the restaurant. The results showed that three, two Chinese style and one western style, of the restaurants had mean COF lower than 0.5, a safety standard commonly adopted in the USA. Engineering/managerial interventions are required for those restaurants as far as employee safety is concerned. The fast food restaurants had more consistent COF levels than those of the other two types of restaurants as these restaurants only operate down-stream food preparation in the store. The Chinese style restaurants had significantly (p<0.05) lower COF than those of the western style restaurants. This was consistent with the commonly belief that Chinese style cuisine is much greasy, in general, as compared to those of western cooking.

Abstract: Soil slope in seasonal frozen area subject to rainfall or freezing and thawing cycles, the shear strength of soil damage and lead to landslide hazard. In order to predict the landslide hazard through monitoring the soil slope stability real-time, the soil slope stability evaluation system is established. The Neural Network Algorithm can simulate elastic-plastic finite element method well, and using Genetic Algorithm to search cohesion(c) and internal friction angel(φ) which meet the accuracy requirements. And the intelligent parameter inversion model of soil shear strength (c, φ) based on displacement is established. So, the slope stability can be evaluated real –time based on displacement monitor. Application of this method in actual project shows that this method is accurate and effective.

Abstract: The displacement is the most easily exact acquisition parameter in soil slope. In order to master the stable state of slope in real-time and accurately, the evaluation analysis of soil slope stability based on the information of displacement monitor is established. The Strength Reduction Method is used to describe the stable state of slope. According to Neural Network Algorithm, take the data of Finite Element Method numerical simulation, the function relationship between strength reduction factor and slope displacement is formed, which can calculate the Strength Reduction factor form slope displacement, then slope stability is obtained. At last, efficiency and applicability of this method is verified with a group of numerical simulation data.

Abstract: The application of GOCI data in the research of sediment transportation is introduced in the paper..Compared with traditional ways to verify the simulated results, remote sensing data can contain a huge observation scope and a longer observing time.In. The computed results of water level and suspended sediment concentration were compared with processed GOCI data and had an acceptable result.

Abstract: This study investigates the influences of slopes on objective friction measurements of different floor materials. It is known that a person is more likely to slip when walking on a slope than when walking on a level surface. In term of the prevention of falls for elders and MMH (manual material handling) workers, slope is more commonly in the design of barrier-free environments. However, it could be a potential environmental risk of slip accidents. The environmental problems were generally caused by poor floor slipperiness. The coefficient of friction (COF) is one of important objective indexes to assess floor slipperiness. It is worthy to investigate that the influences of slope on COF. Thus, COF measurements under different slopes, floor materials and surface conditions were conducted in this study. The data were analyzed to investigate the influence of slope on objective friction measurements of floors. The results showed that the rougher surface and dry conditions had the higher COF values. The different slopes result in significant COF values; however, there is no significant trend. Therefore, there should be more warning signs and slip resistance facilities or accessories to reduce the chance to slip and fall on the slopes.

Abstract: The problem of highway tunnel disease is more and more serious, however, the assessment of health condition for highway tunnel is lack of effective methods. In order to build the health diagnosis system for the highway tunnel, the index and weight system of the assessment model was studied by the neural network method. First, all kinds of highway tunnel disease’s indices are proposed, then, the health grades are founded based on eight classes, finally, the quantitative analysis for weights of index is developed by neural network method. The results show that the weights of health condition index can reflect the actual situation, and can be used in health diagnosis assessment model.

Abstract: A full-field method to measure the surface warpage of wood plate at elevated temperature by phase-shifted shadow moiré method is presented. Test of the method on a cypress wood plate is demonstrated. A comparison of the test results at room temperature to the ones obtained by contact type sensor was made. A good agreement between them is shown. Further measurement of the plate warpage at elevated temperature reveals the warping behavior of wood plate.