Research On Design Of The Compensator Of The Total Station

The Total Station is a kind of high-tech measuring instrument that integrates light,machine,electricity and software.It can be used to measure the relative geometric relations such as distance,angle,and height difference between points and points.So it is widely used in the field of precision engineering measurement or deformation monitoring such as large buildings and underground tunnel construction.The compensator system is a very important part of the main systems that make up the whole station,and its main function is to correct the measurement error caused by the tilt during the measurement process.The compensator is the core component of the compensation system.It uses a liquid as a sensitive element to measure the deviation angle of the station’s tilt through the action of gravity,and then correct the deviation angle.In order to ensure the correctness of the correction,the reliability of the connection between the compensator and the Total Station,and the stability of the compensator itself are two very important factors.At present,the domestic and foreign Total Station still has gaps in some areas such as the overall performance and stability of the Total Station.This paper takes the compensator of the domestic RTS 110 as the research object.The installation of compensator and the stabilization time of compensator are optimized by modern design method,which has laid the foundation for improving the stability of the domestic full-station compensator.In this paper,the size of pretightening force installed by compensator is determined by theoretical analysis and calculation.It changes the state in which the pretightening torque was based on the feeling of the assembler.This makes the pretightening torque more scientific and reliable.Through theoretical analysis and calculation,the pretightening torque of the compensator is determined to be 1 N.m.According to the determined pretightening torque,the rolling vibration test(about 1800 vibrations)with a free falling body of 5mm was performed.The stability change of the compensator zero bit is less than 5 "(corner seconds).In this paper,the stability time of the compensator itself is optimized.The stability time of compensator is an important index to verify the performance of compensator.In this paper,the fluid sensitive elements of compensator are optimized by the knowledge of fluid mechanics.The optimal design goal is to improve from the original 15s～20s to about 10s.The stability time mathematical model is established according to the optimal design target.By solving the mathematical model,the motion viscosity coefficient of the compensator liquid is determined,and the ratio of the liquid mixture is completed.Based on the optimization results,a new compensator is made.The experiment can prove whether the stability time of the compensator achieves the optimal goal.The experimental result is that the stability time of the optimized compensator is 10.6 s on average.The optimization goal was achieved.It has laid a certain foundation for improving the stability of the domestic total station compensator by optimization of pretightening force and mixing fluid ratio.At the same time,this paper puts forward the next research content and direction.