· Firstly, the BR-FCBF algorithm is used to select the key assembly parameters that affect the straightness error. Secondly, the GA-MSVM algorithm is applied to construct the straightness error assessment model. Finally, the assembly-related data collected on a MT-LA assembly workshop is used to verify the proposed method.

 · The accuracy is compromised by both variability of the wire reference and typical wire detection methods such as microscope or electrical contact. ... Application of a new straightness measurement method to large machine tool. Ann CIRP, 30 (1) (1981), pp. 455-459. View Record in Scopus Google Scholar.

length, small aperture, So the space that could be used to detect straightness of deep hole directly is very limited, and the operation of straightness inspection is difficult. At present, there are 9 commonly used deep hole's straightness inspection methods: straightness gauge method, leverage measurement

 · The fast correlation based filter (FCBF) [] algorithm is a multi-feature selection method which uses symmetry uncertainty to calculate dependences of features.The FCBF algorithm finds best subset using backward selection technique with …

 · In order to measure the straightness deviation of the kiln cylinder, a method was presented and experimentally demonstrated in real industry field in this paper. …

In one embodiment, a detection method based on the cable straightness detection device includes: positioning the cable through the first through hole and the second through …

First, the beam is roughly aligned along the measurement object. The detector is then positioned on the selected measuring points and the values registered. According to the …

The basic principle of straightness measurement is that all measurement values will show the position of the detector unit relative to the laser beam. The laser beam can be envisioned as a very, very long, absolutely straight and weightless ruler. First, the beam is roughly aligned along the measurement object.

 · Now in the line equation, put the values θ (theta) = 0,1,2,….,180 and check the r you get. For every (r, 0) pair, you increment value by one in the accumulator in its corresponding (r,0) cells. So now in accumulator, …

Method and device for detecting straightness deviations and/or deformations in a rotary kiln Download PDF Info Publication number EP2724103B2. ... rotary rollers Prior art date …

 · Straightness measurement for long guideways is usually difficult to perform, and it requires additional equipment or special treatment with limited applications. In this paper, a new approach is proposed using the profile matching technique for the long guideways, which can be applied to most straightness measurements.

 · The method is inspired by the classical Susan corner detection model, and the improvement is two-fold. One is the choice of the self-adaptive threshold, which can be used to detect the possible ...

A method for detecting straightness deviations and/deformations in a rotary kiln (1), the rotary drum (4) of which includes bearing rings (6) spaced apart from one another in the axial direction and respectively supported on rollers (7), involves scanning the outer surface area (5) of the rotary drum (4), the bearing rings (6), the rollers (7) and/or the shafts (17) …

 · The surface straightness of the rail affects the accuracy of the rail welding process and the train safety. A dual non-contact sensor joint measurement method for …

28. ：. X Meng, D Yu, X Pang, N Lei, Z Chen. ：. The straightness of deep hole axis is tough problem,so a laser"threepoint detection"method is firstly proposed for solving this problem,and a detection model is built in this paper. Based on this method,a device used for the noncontact detection of hole axis straightness ...

 · When it takes 30 s to scan a 3-meter-long rail, it requires taking pictures of every 0.2 mm movement in straightness detection. Therefore, the frequency requirements for …

 · By analyzing the common detection methods, application scope and detection accuracy of straightness of guide rail parts, the application occasions and detection accuracy of each detection method are clarified. It provides a theoretical basis and guidance for testers to detect straightness and deal with errors.

Straightness, which regulates the deviation from the geometrically perfect line, is measured using a height gauge and a coordinate measuring machine. This page explains how to do this, as well as the advantages …

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 · The standard form of straightness is a 2-Dimensional tolerance that is used to ensure that a part is uniform across a surface or feature. Straightness can apply to either a flat feature such as the surface of a …

 · Weck et al proposed a method to measure the motion straightness of slideway with a 4-quadrants photodiode [1, 2]. This method can detect the straightness errors of CMM yet with not so high accuracy as a laser interferometer. The similar method had also been used in an optic auto-alignment system for diagonal

 · Flatness is a property of a plane, while the straightness is about a straight line that only has length. 2. Flatness is the 3D version of surface straightness. 3. Flatness should always be on a flat surface, while straightness is usually put on surfaces that are not flat, it specifies how much the surface or axis is allowed to vary from the ...

 · Straightness tolerance is a 2-dimensional GD&T callout that controls the straightness of part features. No axis can be perfectly straight. The goal is to ensure it is straight enough for the application. This callout sets a standard on how straight a feature must be along its length. Straightness can control two very different types of functions.

 · (2) The measurement accuracy of developed measurement system for straightness and roundness is 0.05 mm, and relative errors between measurement …

A method for detecting straightness deviations and/deformations in a rotary kiln ( 1 ), the rotary drum ( 4 ) of which includes bearing rings ( 6 ) spaced apart from one another in …

The straightness deviation is a key parameter to evaluate the operation state of large low-speed rotary kiln in hot state. In order to measure the straightness deviation of the kiln cylinder, a method was presented and experimentally demonstrated in real industry field in …

 · These detection techniques are classified into four major categories: manual methods, non-vision-based methods, vision-based methods and hybrid methods. Vision-based methods are classified into three major categories: detecting environmental constraint (DEC) methods, special lighting (SL)-based methods and other methods.

 · Let's get to know the details below! In general, to accurately detect the straightness of the hollow piston rod, four different methods can be selected. The first method is the pitch method. Usually, this method is mainly used for measuring long parts. For example, when the piston rod is divided into several small sections, the relative ...

 · Using the characteristics of the roll straightening device, a straightness detection method for large pipes is proposed just by adding a laser displacement sensor, and the calculation model for ...

 · Presently, the traditional methods of measuring hydraulic support groups pose and straightness include pull-wire measurement, sensor measurement [ 4 ], or measurement based on gyroscope-based inertial navigation technology [ 5 ], which indirectly obtains the straightness of scraper conveyor and hydraulic support using the walking track of shearer.

A method for detecting straightness deviations and/deformations in a rotary kiln, the rotary drum of which features bearing rings spaced apart from one another in the axial direction and...