The press instrument has many advantages , for example the measure range is 0 ~ 60mpa , the precision is one percent , and the hydraulic press of two roads was sampled every five minutes . this system makes use of the " data fusion " technique to compensate measuring errors caused by temperature changing . the press instrument has large storage space and can store about thirteen day ' s press data 该测试仪的主要特点是：测量量程为0 60mpa ，精度为1 ；每5分钟采集一次两路通道液压压力值；采用“数据融合”技术进行温度补偿；数据容量大，能存放约13天的压力数据； led显示器可交替显示两路压力值；无线数据通信功能，传输速率为9600kbps ；采用本安设计，可安全的应用于环境复杂的煤矿井下。
The usual measuring method , that is , to use the water temperature of 1 meter under water surface to adjust the spinning speed of the sounding device , will result in greater measuring errors . this article put forwards the mathematical model of water temperature with the vertical water temperature that was measured at the deepest site of six sections . after adjusting the sounding device w 本文依据实测的6个断面深泡点处的垂线水温建立了水温辅助测深数学模型，依据该模型即可得到保证回声仪测深精度的水温值，用该水温值校正回声仪后，便可得到断面对应于各起点距处的水深值，从而解决了丹江水库三维模型建立的关键问题。
Simulation tests shows that the diagnosis system can carry out on - line monitoring and diagnosing for the system ' s air leak by making use of the existing routine measure points and the operating parameters to be easily measured directly ; because of the generalization characteristic and reasoning function of the artificial neural network , the diagnosis system can reach better diagnosis result even under the circumstance of insufficient information , obvious measuring error and yawp shape change ; the above research result plays an important instruction meaning in improving operating economy of power station boiler 仿真测试结果表明，利用电站锅炉现有的常规测点和系统易于直接测量的运行参数，可以实现系统漏风状况的在线监测与诊断；由于人工神经网络所固有的泛化和推理功能，即使在测量信息不完备或存在明显的测量误差和含有噪声形变等情况下，诊断系统仍然可以提供较为有意义的诊断结果；上述研究结果对于提高电站锅炉运行经济性具有重要的指导意义。
The 3d model needs three parameters , among them , the distance from the dam and the distance from the starting point of the section can be measured directly , and the depth of the water corresponding to the distance from the starting point of the section can be measured by the sounding device . however , because the reservoir is very deep , the measuring error of the water depth is greater 而建立其三维模型需要三个参量，其中距坝里程、备断面起点距可直接测得，而对应于各起点距的水深值因丹江口水库较深，按通常的方法使用回声仪测深，即以水下二米处的水温校正回声仪的转速来测深有较大误差。
In this thesis , the calibration , laying and measuring error of the concentric capacitance fuel sensor are researched . and the major work is following : 1 . taking the fuel entity of fully - filled airplane oil tank as studying object , the outhor calculates the central points of the section contours and the volume of the remnant fuel under the section height by means of numerical calculation 本文研究了同心电容式油量传感器的标定、敷设和误差分析的方法，主要工作如下： ( 1 )以飞机油箱满载状态下的油液实体为研究对象，用数值方法计算出实体模型各剖面的面积中心点和各剖面高度下的油液体积值。
Airborne photo - electric reconnaissance equipment , 3 . airborne photo - electric fire control and tracking system . based on the items about apsse we studied in recent years concerned with mobile measuring error , this thesis performed the study on the theory , and stressed on analysis and discussion the error species , error sources , error transfer relations of apsse 重点分析和探讨机载光电跟踪测量设备的测量误差的种类、误差源、误差传递的关系，并从系统的角度出发，建立机载光电跟踪测量设备测量误差的位置方程，为开拓和研究机载光电跟踪测量设备作必要的技术准备。
The main work of the first part includes : introducing some methods of underwater sound positioning and analyzing their performance , analyzing the theory of measuring direction and distance of the target by three elements symmetrical and dissymmetrical array , comparing the measuring error of two kinds of array , and giving the theory of the generic arrays and discussing the phase wrapping and the distance wrapping in passive ranging 对被动测距技术的研究工作主要包括：简单介绍了水声定位的几种方法，并对其性能进行了分析对比，分析了三元对称阵和非对称阵测向测距的原理，对两种阵型的测向测距误差进行了对比分析，还给出了一般阵型测向测距原理，最后还对被动测向测距中存在的相位模糊和距离模糊问题进行了探讨。
Moreover , on the basis of analyzing the dynamic time - variant characteristics of manufacturing errors and measuring errors and the influence of the measurement to the dimensional iv distribution of the work - pieces , a dynamic model ? shedlike model for the first time is initiated of the manufacturing dimension distribution of the work - pieces 分析了机械加工系统的加工误差和测量误差分布的动态时变特性，建立了零件测量尺寸分布的数学模型；在分析了加工误差和测量误差动态时变特性及测量对零件尺寸分布影响的基础上，首次提出了零件加工尺寸分布的动态模型? ?棚状模型。
Base on the analysis of the grating linear displacement measurement theory , the measure errors especially the subdivision error of the grating scale , this paper focuses on the theory of switch and merge of dual grating scales ’ signals , builds the design criteria of high speed high precision displacement measurement by using dual grating sales , designs the switch picking reference with high precision and fast switch and merge method , analyses the errors brought in by switch and merge of the duals grating scales 在分析光栅线性位移测量原理、光栅尺的测量误差尤其是细分误差的基础上,本文重点研究双光栅尺切换与合成的原理,建立了基于双光栅尺高速高精度位移测量的设计准则,根据设计准则设计了切换基准拾取方法以及快速切换与合成方法,分析了双光栅计数值切换合成的误差。
The application on 6 large enterprises indicates that tvm system is an instrument with advanced technology , reasonable design , convenient operation , perfect function and high accuracy . the measure errors of the instantaneous rotation speed , which is measured by non - contact and magnetoelectricity sensor , have been completely investigated in this paper also 国内6家西南交通大学博士研究生学位论文第11页大型企业的应用表明，该系统技术先进、设计合理、操作简便、功能完善、测试精度高。
