Advanced Materials Research Vols. 468-471

Abstract: Abstract. To improve the automation degree in special working environment which contains explosive gas. We develop a new type of temperature control hydraulic sensor basically on theory and lots of experiments. As the temperature reaches about 85°C，the motion part of the inductor will stretch to a certain length, and then it will push the adjusting rod. Simultaneously，the adjusting rod will overcome the elastic force of the spring and compel the spool valve to deform, and finally the control valve port will be open, it allows the control oil of the hydraulic system to pass. At last it reaches our destination that we can make the control of hydraulic circuit be realized.

Abstract: Abstract. An emergency shelter device is proposed to address the major accidents of rear wheels out of balance due to the tire’s bursting of high-speed car. The design uses the support plate mechanism, in the moment of the tire’s bursting, which would balance the car automatically, when TPMS system issues commands. It achieves the purpose of supporting the car balance and travel that the curved design and calculation of the support plate using sliding friction and rolling friction mechanism, which could effectively avoid secondary accidents caused by the tire’s bursting and have a good prospect.

Abstract: Monitoring of precipitation using X-band weather radar systems is becoming popular. X-band weather radar network, as an additional equipment of China new generation weather radar, primarily used to measure weather echo within 3km above the ground and has a high prospect. The network, based on sensor grid, is greater information advantage and network advantage. This paper describes the design, the key technology and implementation of an architectural framework of the weather radar network based on sensor grid. The results show that the network works robustly in real time.

Abstract: Most civil engineering structures have long service life and situate in severe environment. So it is the key to carry out testing task continuously according to scheduled demands for the long-term monitoring based on FBG sensing. But the existing instruments cannot satisfy the long-term and remote testing demands. Based on virtual instrument and remote panel technique, the automatic testing and controlling system for FBG sensor array were developed. Modularization programming method was adopted and the control program can be adjusted according to practical demands freely. The testing system can save and figure the results automatically, and it can also discern and process the error signal. These extend and perfect the function of traditional FBG demodulation instrument, and make the testing system more flexible and reliable. It greatly reduces the difficulties in remote and long-term testing task.

Abstract: A new measure control technology for testing the compressive strength of concrete structures which is called noumenon sampling method is put forward. The concrete strength of different curing time was got from the application of noumenon sampling method in the detection of winter construction concrete structures. According to the grey system theory, the GM (1, 1) model is used to establish the prediction model of the concrete strength. The established model can be used to determine when the concrete structures will achieve the critical strength in frost resistance. This determination can provide scientific basis for the quality control of concrete in winter construction. Analysis and calculation show that the predictions agree well with the experimental data. The result is ideal. So the prediction model can be applied as a new method for controlling the concrete structures strength in winter construction.

Abstract: The transition surface of blade tip has direct impacts on the quality and lifespan of indexable inserts. For rectangle indexable inserts with four different transition surfaces, the paper analyzed how the transition surfaces put impacts on the cutting temperature and wear of inserts by finite element analysis software. The simulation results show that clearance angle of inserts has serious impacts on the blade performance. Besides, to control the clearance angle in an appropriate range , the cutting temperature and wear of insert would decrease accompanying with the rise of clearance angle.

Abstract: With the development of urban transportation, vibration and noise control has attracted increasing attention. Vibration and noise level has become one of the important hallmarks of evaluating the influence of urban transportation to environment. As Tuned Mass Damper (TMD) is an effective means of vibration control, there is more and more emphasis on its research and application. Reasonably designed TMD can reduce vibration and noise caused by wheel/rail impact. So how to take into account the complex factors to improve the design of the TMD is still the important issue. TMD system is an effective structure. In order to study its vibration reduction effect, modal calculation and wheel-set drop simulation have been analyzed in this paper. Through varying the mass of TMD, the performance of vibration attenuation have been verified. The stability and performance of damping property under impact load have been confirmed by wheel-set drop simulation. Comparing the track which uses TMD and the normal one, the effect of TMD system can be testified effectively.

Abstract: In order to improve agricultural machinery product value in conceptual design scheme evaluation, a novel approach was put forward to evaluate conceptual design schemes in the view of value engineering. Realization of the method was divided into cost estimation and function evaluation. In cost estimation, weighted mahalanobis distance between historical data and estimating product schemes were calculated to express their similarity, their cost attributes were described by different membership functions, exponential smoothing method was selected to get estimation solution; in function evaluation, evaluation assignment was chosen to determine function coefficients of different schemes, by using improved AHP to modify judgment matrix. An example of sugarcane harvester is given to illustrate the validity and feasibility of proposed method.

Abstract: The technology of concrete of using tailings sand and gravel instead of natural sand and gravel belongs to Inorganic nonmetallic materials science, and the direction of the popularization and application is the field of civil construction .Using the iron tailings in the north of Tangshan as research sample,Besides it also been researched that mix design of concrete with iron ore tail and tail ore instead of natural sand, As a result the corresponding design principles have put forward.

Abstract: Some suggestions for developing new working fluids for moderate-high-temperature heat pump with excellent thermal and environmental performance were given firstly in this paper. The theoretical and experimental performance analysis of new-developed working fluids M1-M6 was carried out. The theoretical performance results showed that M1-M6 had high heating efficiency and GWP (Global Warming Potential) of M2 was less than 150. The experimental results showed that M5 had higher thermal efficiency than other two working fluids under same working condition. At the ambient temperature respectively of 30 Centigrade Degree and 40 Centigrade Degree, it took 70 and 65 minutes by the heat pump charged with M5 as working fluid to heat 100 liters of water respectively from 30 Centigrade Degree to 80 Centigrade Degree. Meanwhile the system’s COP (Coefficient of Performance) was respectively 2.9 and 3.0.