Cast iron plate, cast iron platform wiring layout overview From the data statistics point of view, in order to get more reasonable and reliable measurement results, data processing should make full use of measurement data provided by the measuring point, and these measurements must reflect the objective reality. Simultaneous measurement of the distribution of sections and measuring points shall be compatible with the principle of evaluating flatness error. When inconsistent with the principle of evaluation, consideration should be given to facilitating the conversion of the measurement results. Visible wiring point way will affect the complexity of flatness data processing and flatness error measurement preparation. The principle of wiring is: to ensure the accuracy of measurement, measuring points to strive to even distribution, both as possible to fully reflect the shape of the plate and facilitate data processing. The specific method is as follows: The measurement cross section should be a representative section of the flat plate, such as the two diagonal plates, four edges, two midline, etc .; measuring point should be flat on the representative points, such as the four corners , The center of the tablet, the midpoint of the four edges and so on. Measured cross-section and measurement points strive to distribute evenly, so that both reflect the status of the entire flat, but also conducive to the basal transformation. The distance between two measuring points on the same cross-section should be divisible by the measuring cross-section length, and it is best to divide the section into even sections so as to make the measurement of mid-plane and mid-end of the slab coincide well and be convenient for data processing. The number of measuring points to be appropriate, too little can not reflect the actual situation of the entire face, too much measurement complexity, measurement error increases. The number of measuring points generally according to the size of the plate was seized, the level of processing accuracy, according to statistical experiments that measuring points in the 10-50 is appropriate. Various Wiring Arrangement Measurement Error List The following table. As the E-shaped, Japanese font, the average daily type has a larger three-measurement error, generally do not; Wang-type adjustment inconvenience, but also rarely used; Meizi type, the two types of balance by the base conversion can get the same accuracy Degree of flatness value, so our flatness testing standards and flat-panel testing are provided for the accumulation of these two types of wiring layout, in contrast, grid-type measurement has the advantages of convenience, especially for large flatness measurement, flat Poor need some computing technology and computational sensitivity, not easy to grasp the application. Although the calculation of the distribution of rice font more complex, but easy to grasp the application. As the measuring point measurement error is directly measured with the maximum point coordinates as the flatness measurement of the limit error, if the coordinates of the minimum inclusive area assessment process, the measurement of the limit error is not only measured point measurement error, but also with the assessment The basal plane and the extreme point of the location. Through error analysis, it is found that the same measurement values ​​obtained after the original data and the base surface transformation by the diagonal method using the rice patterning points can be obtained from the adjustment of the mesh-type points after the adjustment and the base-surface transformation.