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Ren H.,University of Jinan | Zhang L.,China NATIONAL HEAVY DUTY TRUCK GROUP Co. | Tang C.,Tianjin University
Chinese Control Conference, CCC | Year: 2015

Denoising is the key problem in electronic speckle pattern interferometry (ESPI). In order to eliminate noise, to enhance the qualities of fringe patterns, we proposed a new filtering method which is based on curvelet transform for ESPIAnd its application to electronic speckle fringe filtering. Firstly, fringe pattern is performed on by curvelet transform;Secondly, the method which is combined with soft and hard threshold is applied to remove coefficient of noise;so as to separate signal from noise, threshold process is conducted by curvelet coefficient of square. Finally, the filtered image is obtained by reconstruction of coefficient of curvelet transform. This new method has applied on one computer-simulated fringe pattern and one experimentally obtained pattern of the filter, and compare to wavelet filtering and windowed Fourier filtering whose models are extensive used. The index that filtered results is evaluated with mean square error (MSE). Experimental results demonstrate that the method for filtering in ESPI has the advantages of high precision, fast filtering speed, simplicity in implement, and suitable for measurement of real time. © 2015 Technical Committee on Control Theory, Chinese Association of Automation.


Guan Y.,Shandong University | Zhang H.,China National Heavy Duty Truck Group Co. | Liu J.,China National Heavy Duty Truck Group Co. | Sun S.,Shandong University
Journal of Materials Processing Technology | Year: 2012

The laser polarization is a basic characteristic of CO 2 and solid-state lasers. The material's absorptivity to laser is dependent upon the laser incident angle. Thus, the laser polarization can be utilized to control the bending angle by changing the laser incident angle during laser bending. The laser polarization is introduced into laser micro-bending, and an experimental system is established. Laser micro-bending process based on the characteristic of the laser polarization is realized. For uncoated stainless steel specimen, the bending angles acquired at bigger incident angles are bigger than those acquired at zero incident angles. The bending angles increase linearly with the increase of the incident angle when the incident angle changes from 60° to 80°. During laser multi-scan bending, the final bending angle no longer varies with the scanning number, and approximately equals to the complement angle of the incident angle when it approaches to the complement angle. By means of adjusting the laser incident angle and scanning velocity, unfinished and finishing laser bending can be realized to satisfy the forming efficiency and accuracy. The absolute error between the final bending angle and the expected angle is less than 0.1°. © 2011 Published by Elsevier B.V. All rights reserved.


Liu X.,Heilongjiang Institute of Science and Technology | Liu J.,China National Heavy Duty Truck Group Co.
Advanced Materials Research | Year: 2012

Research on spindle system of a machine tool, using Solidworks software to establish the spindle assembly model, using ANSYS finite element analysis method to analyze the dynamic rigidities of spindle systematacially. Compare dynamic rigidities of test with the motorized spindle were analyzed. Validate dynamic rigidities of the spindle accord with dynamic characteristic. © (2012) Trans Tech Publications.


Str

Trademark
China National Heavy Duty Truck Group Co. | Date: 2015-11-30

Vehicles for locomotion by land, air, water or rail; jet engines for land vehicles; trucks; automobile chassis; automobile bodies; automobiles; gear boxes for land vehicles; transmission shafts for land vehicles; engines for land vehicles; motors, electric, for land vehicles; automobile tires; tires for vehicle.


Trademark
China National Heavy Duty Truck Group Co. | Date: 2012-06-26

Starters for motors and engines; diesel-operated machines other than for land vehicles, namely, diesel-operated water pumps for use in motors and engines; gasoline-powered machines other than for land vehicles, namely, electricity generators; glow plug of vehicle engines; control mechanisms for machines, engines or motors, namely, pneumatic and hydraulic controls; pistons for vehicle engines; engine oil filters; intake air filters for automobile engines; pumps as parts of machines, engines or motors; speed governors for machines, engines and motors. Providing information relating to repair in the automobile sector; machinery installation, maintenance and repair; motor vehicle maintenance and repair; vehicle services station services featuring refueling and maintenance services; vehicle wash; spraying and coating services, namely, application of coating and sealers; retreading of tires; leather care, cleaning and repair; vulcanization of automobile tires; disinfecting services, namely, heat based disinfecting services, namely, killing of organisms and removal of toxins in enclosed environments, drying, disinfection, reduction of asthma triggers, baking out odors, destroying viruses and bacteria.


Trademark
China National Heavy Duty Truck Group Co. | Date: 2012-01-17

land vehicles; automobiles; carts; buses; trucks; coaches; recreational vehicles, namely, campers; wagons and motor cycles.


Trademark
China National Heavy Duty Truck Group Co. | Date: 2010-07-20

Gasoline-powered machines other than for land vehicles, namely, electricity generators; diesel-operated machines other than for land vehicles, namely, diesel-operated water pumps for use in motors and engines; glow plugs; carburetors; igniting devices, namely, spark plugs for internal combustion engines; fuel economizers for internal-combustion engines; dynamos; pistons for engines, namely, for industrial engines; exhaust gas refining device, namely, a catalytic converter for internal-combustion engine; oil filters, namely, diesel oil filters for motors and engines. Buses; tilting carts; Motor land vehicles, namely, automobiles, motor coaches, trucks, vans, sports cars; tires for vehicle wheels; fork lift trucks; trailers for vehicles; automobile chassis; bodies for vehicles; upholstery for vehicles; funiculars; locomotives; vehicle wheels. Motor vehicle maintenance and repair; vehicle cleaning; vehicle services station services featuring refueling and maintenance services; construction, namely, building construction services; building construction supervision; upholstering; retreading of tires; disinfecting services, namely, heat based disinfecting services, namely, killing of organisms and removal of toxins in enclosed environments, drying, disinfection, reduction of asthma triggers, baking out odors, destroying viruses and bacteria.


Trademark
China National Heavy Duty Truck Group Co. | Date: 2011-12-20

Land vehicles, namely, automobiles, cars, lorries, wagons, and military vehicles for transport, namely, land vehicles; engines for land vehicles; transmission mechanisms, for land vehicles; automobile chassis; automobile spare wheel holders; tires for land vehicles.


Trademark
China National Heavy Duty Truck Group Co. | Date: 2012-06-26

Starters for motors and engines; diesel-operated machines other than for land vehicles, namely, diesel-operated water pumps for use in motors and engines; gasoline-powered machines other than for land vehicles, namely, electricity generators; glow plugs for vehicle engines; control mechanisms for machines, engines or motors, namely, pneumatic and hydraulic controls; pistons for vehicle engines; engine oil filters; intake air filters for automobile engines; pumps as parts of machines, engines or motors; speed governors for machines, engines and motors. Providing information relating to repair in the automobile sector; machinery installation, maintenance and repair; motor vehicle maintenance and repair: vehicle services station services featuring refueling and maintenance services; vehicle wash; spraying and coating services, namely, application of coating and sealers; retreading of tires; leather care, cleaning and repair; vulcanization of automobile tires; disinfecting services, namely, heat based disinfecting services, namely, killing of organisms and removal of toxins in enclosed environments, drying, disinfection, reduction of asthma triggers, baking out odors, destroying viruses and bacteria.


Trademark
China National Heavy Duty Truck; Group Co. | Date: 2014-05-12

Automobiles; sports cars; tilting-carts; buses (motor); lorries; bodies for vehicles; motor coaches; vehicles for transport (military); automobile chassis; waggons.

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