Cheng Shin Rubber (Taiwan)

One of the important devices in a vehicle is the tire pressure sensor. This device couples with other instruments inside the vehicle assisting the drivers in knowing the correct information about their vehicle’s tire pressure. This information helps improve vehicle handling, increases gas mileage, and extends tire lifespan. Once mounted inside the tire, the tire pressure sensor is a stand-alone device. It is powered by a battery that has a limited operating life. Due to it being mounted inside the tire, the driver does not frequently check tire pressure sensor battery. If the battery runs out, battery replacement is not an effective option. This work presents a battery charging prototype that recharges the tire pressure sensor battery. The developed device uses electromagnetic principles to wirelessly transmit power to a device that needs power. We designed a prototype and conducted some laboratory scale experiments. Experimental and validation were based on a tire pressure sensor developed by Kenda Rubber Ind. Co., Ltd, Taiwan (R.O.C). This tire pressure sensor consumes power from a 4.8 V 700 mAh Li-ion rechargeable battery. The experimental results show that the prototype can transmit 4.9 V induction voltage. The maximum current is up to 850 mA with the optimum transmission distance at around of 1.5 cm. This prototype recharges the tire pressure sensor battery wirelessly to extend its battery-power life.

ABSTRACT The primary objective of this study is to investigate the rolling noises made by passenger car radial (PCR) tires with special pitch angles using the numerical analysis method, and compare the numerical analysis results with those of physical tire experiments. By using the numerical simulation features, we can understand the noise performances of the different designs through the numerical analysis results before creating the actual molds and thereby reduce the development costs. In this study, the researcher adopted the finite volume (FV) numerical simulation method because the rapid solving speed feature of the FV method enabled it to be widely adopted by the various major fields such as automotive, aerospace, or shipbuilding where the simulation results are time-sensitive and analytically correct. To achieve the experimental results, the researcher of this study commissioned Kenda Rubber Ind., Co., Ltd. to design the tire pitches and manufacture the tires, and deliver the tires to the Automotive Research & Testing Center (ARTC) for the experiments. When the numerical simulation and experiment results are compared, the characteristic frequency positions are consistent with the error rate of only 3.98%. As such, the analysis method proposed in this study can serve as references for tire manufacturing designs as well as mobile object noise analyses in the future.

The fabrication of large-grain 1.25 μm thick polycrystalline silicon (poly-Si) films via two-stage aluminum-induced crystallization (AIC) for application in thin-film solar cells is reported. The induced 250 nm thick poly-Si film in the first stage is used as the seed layer for the crystallization of a 1 μm thick amorphous silicon (a-Si) film in the second stage. The annealing temperatures in the two stages are both 500°C. The effect of annealing time (15, 30, 60, and 120 minutes) in the second stage on the crystallization of a-Si film is investigated using X-ray diffraction (XRD), scanning electron microscopy, and Raman spectroscopy. XRD and Raman results confirm that the induced poly-Si films are induced by the proposed process.

Previous work on constructive competition has focused on competitors' motives and strategies; however, competition is an interactive process that is affected by both the competitor and the rival. Based on the competitive dynamics perspective and attribution theory, this study examines the impact of a perceived rival's motives on the constructiveness of competition. The results of a survey of 521 employees from 25 companies in the banking and insurance industry in Taiwan revealed that the perceptions of rivals' motives significantly affected the constructiveness of competition. By introducing the perspective of rival analysis to individual‐level competition, the present study provides a more comprehensive understanding of constructive competition within organizations.

The measurements of vibration frequency and damping coefficient have been used to assess the integrity of composite materials and structures by quite a few investigators. In this study, an impulse technique which uses a displacement transducer as a non-contact probe for the measurements of damping up to the third modes has been presented. Com posite beams with structural discontinuity, damage, and imperfection have been investi gated. This study assesses the utility and sensitivity of the impulse technique in the damping measurements for composite beams. Results have shown good correlation be tween the increases in damping and the severity of damage caused by notches and artificial delamination. However, there is no significant change in damping for the composite beams with matrix cracking and inclusion.