Shen H.,Nanjing University of Aeronautics and Astronautics |
Shen H.,Mesnac Co. |
Qiu J.,Nanjing University of Aeronautics and Astronautics |
Balsi M.,University of Rome La Sapienza
Sensors and Actuators, A: Physical | Year: 2011
This paper presents a new self-powered vibration damping technique, which is an application of the enhanced synchronized switching harvesting technique. Compared with other self-powered vibration damping techniques, it not only shows its robustness (particularly facing environmental drifts), but also can harvest the energy and supply power to other electronic circuits, while does not simply dissipate the electrical energy. Experimental results show that a vibration damping of about 5 dB is achieved as a result of energy harvesting, in good agreement with the theory. In addition, the vibration damping system can be not only self-powered, but also supply power to other electronic circuits. In other words, there is a good trade-off between energy scavenging and vibration damping. Along with experimental results demonstrating the effectiveness of the ESSH implementation, we discuss the design of a device aimed at bridging the gap between research in this area and practical application. © 2011 Elsevier B.V. All rights reserved.
Li H.,CAS Beijing Institute of Acoustics |
Tian Y.,CAS Beijing Institute of Acoustics |
Ke Y.,CAS Beijing Institute of Acoustics |
Luo W.,Huazhong University of Science and Technology |
And 2 more authors.
Shengxue Xuebao/Acta Acustica | Year: 2015
The finite-difference time-domain (FDTD) method was proposed for analyzing the two-dimensional (2D) surface acoustic wave (SAW) piezoelectric phononic crystals (PCs) at radio frequency (RF), and its analysis result of the band gaps of the PCs was demonstrated through experiment. The FDTD method took into account piezoelectric effect of PCs, in which the periodic boundary conditions were used to reduce the computing cost of memory and time, and the perfectly matched layer boundary conditions were adopted as the SAW absorbers to reduce the spurious reflections. The experiments used two delay line structures with or without the piezoelectric PCs. The band gaps of the piezoelectric PCs were measured by comparing the transmission coefficients of two delay lines with a method of adding window function together. For an example of Aluminum/128° YX-LiNbO3 piezoelectric PCs, the band gaps of the piezoelectric PCs were achieved by experiments, FDTD method and COMSOL software, which results showed that the calculated results of FDTD had a good agreement with experimental results, and is more accurate than those of COMSOL. ©, 2015, Science Press. All right reserved.
Zhang S.-G.,Beihang University |
Gao F.,Beihang University |
Hang B.-L.,MESNAC Co. |
Li M.,Beihang University
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | Year: 2012
In order to evaluate the feasibility of test scheme for vehicle tire rolling resistance, based on tire rolling resistance measurement system model, a new method of studying tire rolling resistance was developed with displacement deformation. Based on brief introduction of construction process of finite element test model for rolling resistance, by controlling the experimental parameter of outer tire, the displacement field distributions of sensor plate were studied under different conditions and test scheme was worked out. Regarding the sensor installation positions as the detection points, the relation curves between tire rolling resistances and the control parameters were established. After average filtering treatment of collected data, calculated values were compared with test data. Results show that tire rolling resistance rises as the load or speed enhances and reduces as the pneumatic pressure increases. The simulation results are consistent with test data. It is validated that the proposed test method is reasonable and feasible.
Zhao J.F.,Ocean University of China |
Zhao J.F.,MESNAC Co. |
Li M.,Ocean University of China |
Zhou L.,Ocean University of China
Applied Mechanics and Materials | Year: 2014
Polymer mixing is the key process of rubber products manufacturing, and mixer is the core equipment in polymer mixing process. By analysis of the effective factors on mixer mixing temperature, this paper study realization method of temperature control system. A polymer temperature control system using tandem mixing technology is designed to improve the mixing efficiency and the quality. © (2014) Trans Tech Publications, Switzerland.
Mesnac Co. | Date: 2013-03-12
The invention provides a method for check weighing of materials and a check weighing device thereof. Accurate weighing of materials is achieved through physical deformation of a sensing device (1) caused by a vertical downward force. When the induction device (2) detects the materials, the main transmission device (30) stops rotating and the vertical downward force on the weighing device transferred to the suspension mechanism (50) through the weighing device (40). The sensing device (1) deforms under the action of vertical downward force exerted by the suspension mechanism (50) to determine the weight of materials. Comparing prior weighing readings of materials after being proportioned with weighing readings of check weighing, the main transmission device (30) drives the materials to continuously move, the process of check weighing of materials is accomplished.
Mesnac Co. | Date: 2012-12-07
The triple-drum forming machine for the tire comprises a tire body drum, a belted layer drum and a forming drum, which are arranged on the same horizontal axis, wherein a portal frame for conveying a raw material is vertically arranged above the tire body drum, the belted layer drum and the forming drum; the transverse central line of the portal frame overlaps with the axial center lines of the tire body drum, the belted layer drum and the forming drum; the tops of the tire body transfer ring component and the belted layer transfer ring are respectively connected to the portal frame in a sliding manner; the portal frame comprises a horizontally arranged truss and a plurality of groups of vertically arranged upright posts; the horizontally arranged truss is connected with the vertically arranged upright posts.
Mesnac Co. | Date: 2012-12-31
A bead ring and a belt-tread component are prepared in advance, and a forming drum capable of axially moving carries a tire body component to enter a forming pressing workstation. The forming machine comprises a main machine and a servicer, wherein a belt drum laminating workstation at one side of a belt drum, a main servicer laminating workstation at one side of the forming drum, and a forming pressing workstation at one side of a combined roller are arranged along the center line of a main shaft of the main machine; the prepared belt-cap ply-tread component and sidewall-inner liner-carcass ply component are conveyed to the workstations and combined with the bead ring, so as to carry out turn-up forming and pressing operation technologies of a tire blank; the forming pressing workstation is arranged between the belt drum laminating workstation and the forming pressing workstation.
Mesnac Co. | Date: 2012-12-07
The joint device for a tire forming machine comprises a joint device connection frame, composite part laminating device, and cord fabric stitching device, wherein the joint device connection frame axially slides along a portal frame through a connection frame drive device, and is located above the vertical direction of a tire body drum; the composite part laminating device is carried on a joint device connection frame through a composite part frame body; the composite part laminating device comprises an axial laminating drive device and a vertical laminating drive device for controlling and driving a compression roller component located on a composite workstation on the tire body drum; the cord fabric stitching device is carried on the joint device connection frame through a main stitching frame; the cord fabric stitching device comprises an axial stitching drive device and a vertical stitching drive device for controlling and driving a stitching wheel component located on a stitching workstation on the tire body drum.
Mesnac Co. | Date: 2012-12-18
The boost turn-up method comprises a belt drum, which is carried and driven by a belt drum case, and a forming drum, which is carried and driven by a forming drum case; a first boost device, which is arranged along the axial direction, is arranged at the side part of the belt drum; a second boost device, which is arranged along the axial direction, is arranged at the side part of the forming drum; the first boost device and the second boost device are symmetrical along the vertical center line of the forming drum in the turn-up preparation process of a tire blank; the first boost device and the second boost device push the Bladder or the turn-up rods towards the center from two sides of the forming drum. Thus, the same thrust is simultaneously exerted to assist implementation of the turn-up operation.
MESNAC Co. | Date: 2012-10-16
foundry chill-molds; foundry molds of metal; industrial packaging containers of metal; metal containers for the storage and transportation of goods; steel wire. rubber bale cutters; mill machine for rubber; tire building machine; vulcanization apparatus, namely, machines for the vulcanization of tires and rubber; die for use with machines for processing plastic and tires; electromechanical food preparation machines, namely, material handling machines and food processing machines; inking apparatus for printing machines; fertilizer manufacturing equipment, namely, synthesis towers and condensing towers; valves parts of machines; plastic jetting-moulding machine. recorded computer programs for data management; computer operating programs, recorded; recorded computer software for data storage and data management; computer programs for controlling monitors; computer programs being downloadable software for data management; scales; weighing machines; weighbridges, namely, weighing scales; automatic gauges, namely tire pressure gauges, liquid metering vessels, temperature gauges, air pressure gauges; surveying machines and instruments; material testing instruments and machines, namely, tire balancing machines for land vehicles, tire uniformity machines for purposes of measuring and correcting the uniformity of tires, laser tire mileage tester for testing rubber defects and liquid tire mileage tester for testing rubber defects; radiological apparatus for industrial purposes, namely industrial x-ray testing equipment for determining industrial flaws; x-ray producing machines for determining industrial flaws, not for medical purposes; x-ray tubes not for medical purposes; x-ray scanners, not for medical purposes; radiology screens for industrial purposes; precision measuring apparatus, namely, instruments for determining the overall dimension, strength performance, bead unseating resistance, endurance, high speed performance, low air pressure performance and rolling resistance of tires; detectors, namely, gamma ray imaging apparatus and detectors for non-medical use; counters, namely, automotive tire pressure indicators. machinery installation, maintenance and repair; installation, maintenance and repair of computer hardware; retreading of tires; vulcanization of rubber tires; repair of rubber tires; electric appliance installation and repair.