The invention relates to a space three-dimensional coordinate
measuring instrument system and a three-dimensional
control network measuring method thereof, and belongs to the field of precision industry and
engineering measurement. The
system comprises two three-dimensional coordinate measuring instruments, a spherical
prism is fixed at the top of each three-dimensional coordinate
measuring instrument; when the two three-dimensional coordinate measuring instruments are used for measuring the three-dimensional
control network, the two three-dimensional coordinate measuring instruments are controlled to mutually aim at and measure the spherical
prism at the top of the three-dimensional coordinate measuring instruments so as to obtain a mutual aiming observation value between the three-dimensional coordinate measuring instruments, establish a parameter balancing model according to the mutual aiming observation value in combination with the observation value of each
control network point in the three-dimensional control network, and carry out solving to obtain the coordinate of the
control point under the condition of taking a certain observation
station as a reference observation
station and the translation and rotation parameters of other observation stations in the reference observation
station, thereby realizing control network point coordinate transfer between the three-dimensional coordinate measuring instruments. The
system is especially suitable for precise coordinate transmission scenes with poor intervisibility conditions, and can be popularized and applied to polar coordinate measurement systems such as a
laser tracker and a
total station.