Field calibration of wireless dynamometer based on laser ranging and elas-tic strain
In view of the problems of disassembly difficulty and low detection efficiency of wireless power graph instruments used in pumping wells,the calibration method for wireless power graph instruments based on laser ranging and optical rod deformation has been put forward.Firstly,the phase laser ranging module is combined with a nano coated reflector plate,and the displacement values are calculated by using the optical wave phase measurement method.Then,the load values are calculated through using an elastic strain gauge and a mathematical model of the optical rod deformation and load value variation for pumping well.Using high speed digital signal processing technology has integrated the two parameters,and the encrypted transmission technology is used to form a standard indicator diagram.Using detection software with a dedicated data inter-face,the average load and displacement values of the tested wireless indicator are compared and analyzed,and the compliance rate of the work diagram area is obtained.The detection report is issued to achieve on-site calibration of the wireless indicator.The results show that using this new method for testing can avoid disassem-bling the indicator,reduce the impact of instrument disassembly and inspection on production for users,re-duce the waste of manpower,material resources,and financial resources caused by disassembling the indica-tor,and reduce the risk of personnel and instrument damage during the instrument disassembly process.
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