Advanced Materials Research Vols. 542-543

Abstract: We review the current typical materials of microfluidic chip and discuss the microfabrication technologies. A variety of materials exist for fabrication of microchip, including silicon, glass, quartz, polymers and paper. Early developments in microchip materials were focus on the silicon, glass and quartz by referring to the sophisticated microfabrication techniques from microelectronics field. Recently, the introductions of low-cost materials and easily fabricated techniques have offered more alternative ways for rapid prototyping of disposable devices.

Abstract: Based on the analysis of the basic principle of traditional inertial navigation technology, this paper puts forward a kind of simplified model of the track measurement which applies to underground pipeline. The model using structures of half-strap-down stable platform that composes of a single axis gyro, two accelerometers and pulse taximeter, by measuring angular velocity of pipeline azimuth, pitching angle, platform rolling angle and pipeline length, combined with self-actuated research space track, work out the mathematics model, eventually work out the space track of the underground pipeline. The experiment proves that the underground pipeline track measurement instrument which is designed based on the simplified model, can meet the accuracy requirement of the no-dig project on track measurement, and the equipment’s operation is stable and reliable.

Abstract: A high sensitivity fiber-optic refractive index sensor based on the bi-conical single mode fiber tapers is proposed and demonstrated. The relationship between the resonance wavelength shift and surrounding refractive index is investigated. The experimental results show that the resonance wavelength linearly shifts toward longer wavelengths with the environmental refractive index ranging from 1.333 to 1.380. The response sensitivity increases with the decrease of the waist diameter of the tapered fiber. The proposed sensor is easily fabricated, compact and may be useful for the chemical and biotechnological industry.

Abstract: In the winding process, the tape always has a lateral shift along the mandrel due to various reasons. Thus, a straight-line running cannot be maintained. If effective measures are not taken in time, the tape deviation will result in the phenomenon of corrugation and crinkling. Additionally, it would influence negatively on the precise control of tension and the quality of wound products. The tape-edge detection method, based on the charge coupled device (abbreviated as CCD) linear image sensor, is proposed to detect the deviation amount. With regard to the characteristics of PID controller and Fuzzy controller, the combined controller of Fuzzy-PID is raised. According to simulations and experiments, the effect of Fuzzy-PID controller is obviously better than that of PID controller or Fuzzy controller. By presenting the detection and control techniques for the tape deviation, the automatic rectification is achieved, the consecution and the automation degree of winding process is improved as well. Therefore, the quality of wound products is guaranteed.

Abstract: Semi steel radial tire for passenger car needs to be classified and palletized after dynamic balance and uniformity test, in order to store in the finished product warehouse. In view of the present situation that tire's classification and palletizing remains to manual operation, a kind of automatic classification and palletizing manipulator which is used for passenger car tire after dynamic balance and uniformity test has been researched and designed. This paper introduces the manipulator's composition and the manipulator's three dimensional CAD models have been established in SolidWorks platform.

Abstract: In this paper the object of study is automatic sorting and palletizing manipulator for passenger car tire. It designed the driving mechanism and control system of the manipulator. There are 3 degrees of freedom with the automatic sorting and palletizing manipulator in this paper. The horizontal and vertical movement of manipulator's movable parts is drived by servo motor. And manipulator's gripper grabs and places tires by cylinder drive. In addition, the centering device opens or tightens 4 embraced arms by cylinder drive. A touch-screen is used as the man-machine interface, which can represent manipulator's operation process and results. Realizing the control of the manipulator by PLC combined with the corresponding software programming.

Abstract: Automobile central lock and ABS hardware in loop simulation testing system was developed based on MATLAB/Simulink and dSPACE, dSPACE’s standard component MicroAutoBox is the central control node, used to receive speed signal, key position signal skid ratio and remote signal, together with dealing with these signals. Sending relative signals to CAN SJA1000 and CAN PCA82C250 which SCM use STC89C52RC, each node actuates relative motion to control automobile’s door lock and ABS system. ABS executer implements relative brake based of these signals requirements. The result indicates that dSPACE simulation platform can quickly build up model and control system.

Abstract: The fluidic gyroscope signal processing circuit was researched. This paper aims at the circuit problem for lots of electronic components and output signal instability, the adjustable voltage regulator circuit was used and realized the different voltage signal output, the stabilivolt and voltage follower were used and realized the temperature compensation for the voltage signal. The experiment results show that compared with the existing voltage regulator circuit, the PCB area reduces 16% and output signal’s temperature drift decreases 10% in the improved voltage circuit. This signal processing circuit is easy to apply and available for the others gyroscopes, whose repeatability precision is enough high.

Abstract: According to the theory basis of time domain transmission technology, designed a new type of transducer for crude oil moisture measurement. Introducted the measuring principle of time-domain transmission moisture content of crude oil sensor, and designed the signal producing circuit, the machine oscillation circuit, the mixer circuit and phase detector circuit of the sensor. Finally, got the linear relationship between the output voiltage of the transducer and the crude oil moisture rate by testing. The accuracy of measurement is 1% when the water content is 50-100% in the crude oil and it is 2% when the water content is 0~50%.

Abstract: To detect low-pressure dynamic loading in rock-soil, optical fiber Michelson interferometer was adopted to set up the sensing system. Polyurethane package was used to enhance stress sensitivity of optical fiber sensors that composed quasi distributed optical fiber detection system. The sensitivity of optical fiber senor reached -170dB, and met the measurement requirement of low pressure dynamic loading at 0.001MPa-0.01MPa. The results proved that it was feasible to detect low-pressure dynamic loading using the designed optical fiber sensors. It provides a new experiment method for research on response of low-pressure dynamic loading in geotechnical engineering.