circumference errors are less than 0.05 mm; roundness errors are less than 0.05 mm. Themeasurement precision is higher than the standard of GB/T 5605-200*.
the mendable Canny operator based on the linear interpolation is used to pick up the edge of the pointer, the pointers’instructive direction is gotten via the circumference chord length detection method proposed by the article, then according to the central angle of pointer relative to the benchmark and conjunctive relation, the right reading is received The database information management system realizes the consumers’water fee management.
Through the analysis on the major measuring methods for circumference of cigarettes, i. e. the pneumatic method and tape pulling method, which are used in China and foreign countries, a new contactless and photoelectric method adopting CCD measuring principle is stated.
Pointing to the real time monitoring and control of small circular vibration of the main vibration platform in graphite electrode abrading machine, the vibration of the main vibration platform in X, Y axis is detected by a eddy transducer with two probes.
The small circular vibration dynamic amplitude of the main vibration amplitude on platform can be obtained through real time vibration displacement measurement between the main vibration platform and probes, and hence the machine is controlled to ensure the abrading process to be conducted smoothly, which could provide amplitude parameters for translation moving head in EDM process.
The principle of filter tip ciroumference measure-ment and control system for KDF2 shaping machine is de-scribed, the detailed cireuit of measurement and control isgiven.
In this paper,the cause resu-lting transitive error of the circle-angular displacements is discussed. The transitivefunction of angular displacements in any positions that driving and driven rotary axesare due to mechanism errors is established. Quantitative relation between angular dis-placement transitive error δ and error parameters(e,α)of driving and driven rota-ry axes,geometrical parameters(R,b)of poker mechanism and angle Ψ are given;
Under the action of borehole curvature,an initial bending of the fracturing string in a horizontal well is produced along the borehole,then a deformation of the bent fracturing string will be produced again under the comprehensive action of the temperature,sole weight,inner and outer pressures and locally concentrated force,and then the deformed fracturing string will be certainly contacted with the casing inner wall. Such contact state shows a random distribution along well depth and around borehole,being a nonlinear problem of random multidirectional contact friction.
Because the rotational flow of the internal groove reduced the effect of natural convection, the internal wall temperature of internally ribbed tube uniformly distributed along the circumference.
Despite the nonconvexity of the terminal set, by which the circumference serves, it is possible to perform the proof of the unsolvability with the aid of a rather simple mathematical technique on the basis of the Schauder theorem for the fixed point.
In isolated mitochondrial membranes of Astasia longa, large and small circular substructures were observed with diameters of 1.30 and 0.35 μm and thickness of 0.08 and 0.03 μm, respectively.
In this work, we first found and demonstrated that the small circular DNA molecules were derived from Chinese tomato yetlow leaf curl viruses (TYLCV-CHI).
The diffusion-controlled evaporation of small circular volatile liquid films from solid surfaces was monitored by employing video microscopy from a plan view and then applying digital image analysis techniques.
It's always necessary to transit circle-angular displacements exactly in the precision measurements and machining processes.Transitive error of angular displacementsis a main factor which causes the measuring and machining errors.Only the errors ofindividual characteristic positions on circle and the transitive relation of angular dis-placements on driving and driven rotary axes are crossed in one plane due to the exi-stance of mechanism errors are given in some literature.In this paper,the cause resu-lting...
The structure and kinematic characteristics of an all round position steering hexapod vehicle "ARPSV" ispresented. This is a new kind of walking vehicle with legs installed in circular symmetry. In this paper some addi-tional definitions descriping its kinematic characteristics are proposed, with some analysis of its position-postureand study on its three-dimensional computer graphic simulation.
Calculation formula for capacitive pressure sensors with the diaphragm restrained around its circumference has been derived in this paper, which could be used to calculate the pressure measured by this kind of sensors.
圆周
circumference 
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