Accuracy Analysis And Program Implementation Of Gyro Wires Based On Visual Information

With the increasing development and utilization of underground space resources,the environment faced by underground engineering has also become more complex.In order to ensure the smooth completion of the project,it is necessary to improve the accuracy and quality of measurement data processing results,which is one of the main tasks of underground engineering surveying.Due to the unique nature of the underground environment,highprecision GNSS networks are difficult to measure,Underground measurement is still mainly based on traditional traverse measurement.As the length of the traverse increases,the directional error of the underground traverse will gradually accumulate.Gyro directional measurement can effectively control it.In large-scale underground engineering projects,the accuracy of gyroscope orientation is easily affected by complex environments,and the observation accuracy of gyroscope azimuth angle affects the quality of underground wire adjustment results.Therefore,the effective use of gyro north seeking data and the adoption of reasonable data processing methods are of great significance for the smooth implementation of engineering.Aiming at the above problems,this paper takes the magnetic suspended gyro total station as the research object,and studies and discusses the methods of magnetic suspended gyro orientation measurement and gyro traverse adjustment.The main contents are as follows:(1)This thesis summarizes the layout forms and commonly used adjustment methods of underground wire networks,and elaborates on the principles of two classic adjustment methods for gyroscopic wires.It is found that the classical model ignores the variability of gyroscopic orientation accuracy affected by complex environments.According to the north finding principle of magnetic suspension gyroscope and the data acquisition and processing method of magnetic suspension gyroscope,combined with the characteristics of data visualization of gyroscope north finding,the gyro traverse adjustment method based on magnetic suspension gyroscope north finding data is introduced,including the establishment of error equation and adaptive weighting model of gyro azimuth angle,as well as the accuracy evaluation of each measured magnetic suspension gyroscope azimuth angle.(2)Based on the wire adjustment model based on magnetic levitation gyroscope northseeking data and the commonly used data adjustment methods for underground wires,a wire network accuracy analysis program capable of processing the added gyroscope edge was developed using Python language.The coordinates of each unknown point after adjustment can be obtained,and the corresponding wire network type and error ellipse can be drawn,which can intuitively analyze the wire accuracy before and after adding the gyroscope edge,Improved the efficiency of indoor data processing in underground engineering surveying and avoided errors caused by manual calculations.(3)Perform gyroscopic orientation work on some measurement sections in the a Mountain Rail Project.Using the developed program to process the observation data of magnetic levitation gyroscopes and wire observations,analyze the rotor data during the observation process,generate regression curves for the first and second positions of precise north seeking,evaluate the orientation accuracy of the added gyroscope edge,compare the error ellipses of the unmeasured gyroscope edge with the error ellipses generated by the program adjustment function,and find that the error is significantly reduced.The engineering application is good.