要求高精度的

There are numerous hydraulic elements used on construction machinery.Some combined bores in hydraulic elements are small but machining accuracy is high,making it difficult to measure them and machine by commonly lathing.

工程机械所采用的液压元件种类较多，其中一些液压元件上的复合孔尺寸较小，加工精度要求高，测量困难，在车床上采用车削方法很难加工。

The experiment shows that the adoption of Moiré fringes of the circular grating can make highprecision torque measurement of the principal axis meet the requirement, which offers a new noncontact method for the measurement of mechanic principal axes.

实验结果表明，采用圆光栅莫尔条纹可以达到主轴扭矩高精度测量的要求，为机械主轴测量提供了一种新的非接触式测量方法。

ABSTRACT With the rapid development of modern science and technology, the optical metrology is required to have high quality, high efficiency and automation.

随着现代科学技术的迅速发展，对光学计量技术提出了高精度、高效率和自动化的要求。

The second type of variable speed system is designed to make the motor have wide speed range and high precision.

第二类系统是针对要求有高精度控制及宽调速范围的应用场合而设计的。

The results show that the algorithm makes all of the interpolating points in the theoretical curve and assures the high speed and precision requirements of the motion control system.

结果表明，该算法能使所有的插补点都在理论曲线上，可以保证运动控制系统的高速高精度要求。

On this basis, design a high-precision temperature control system at the refence of the indicators and the actual requirements.

在此基础上结合系统的实际指标和要求设计开发了以单片机为核心的低成本高精度温度控制系统。

Based on the characteristics and requirements of temperature control in electrical heating furnace, a tristate PLC temperature control system in which power is supplied by a three phase silicon controlled rectifier is introduced.

根据电加热炉恒温控制的特点和要求，本文介绍了由PLC拉制、三相可控硅供电的三态高精度恒温控制系统。

The automatic control system for incising glass based on motion controller is built . The basic function , the hardware structure and software design are introduced .

采用DMC-1842运动控制卡开发了一种玻璃自动切割机控制系统，文中介绍了该系统的基本功能，硬件结构和软件设计，针对该切割机加工范围大，惯性大，动态精度要求高的特点，研究了一种适应型PID控制算法。

The automatic control system for incising glass based on DMC1842 motion controller is built . The basic function , the hardware structure and software design are introduced .

采用DMC-1842运动控制卡开发了一种玻璃自动切割机控制系统，文中介绍了该系统的基本功能，硬件结构和软件设计，针对该切割机加工范围大，惯性大，动态精度要求高的特点，研究了一种适应型PID控制算法。

Compared with the traditional measurement system, it is more adaptable to inflammable and explosive occasions because of non- electricity on measuring spots.

油罐液位温度参数的测量，要求较高精度和良好的本质安全性能。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐