The Device Of Portable Automatic Calibrating Experimental Equipment For Coordinate Measuring Machine

This invent is a portable automatic calibrating equipment for Precise measurement of spatial coordinates. Which has novel mechanical structure and data-processing software .it mainly consists of a plane with global holes, a sliding track, a bracket, a foundation and a servo-drive system which can achieve automation and electric control.By using combination calibration of symmetric connection of one dimensional ball row, whose interval's deviation of any two balls is known, the row intervals are contrasted with the coordinate intervals using symmetrically connected method. Then the error of the point in the space of measuring device can be calculated by processing the measuring value with the principle of least method of square. By using the method called combination calibration of symmetric connection of one dimensional ball row, the checking accuracy of one dimensional ball row can reach a high level and the checking range can be largely increased. Based on the calibration of one interval of ball row which is regarded as the standard value, the accuracy of one dimensional ball row and the accuracy of the measuring device which is unknown before checking can be obtained after a whole measuring process. More ever, the checking device needn't to be calibrated periodically according to the national standard value transmission, but it needs to be calibrated by using units with simple device and the standard value that they have. So this method doesn't require the stability of the checking device, and it will also be easier to design and manufacture the checking device.This invention can measure and correct CMM's precision, In addition, any one-dimensional, two-dimensional, three-dimensional linear motion device or Precision Machine tool with a space probe also can be measured and corrected.