数字式转速测量仪毕业论文中英文资料对照外文翻译文献综述.doc

数字式转速测量仪 中英文资料对照外文翻译文献综述  外文 Digital Meter for Measuring Rotational Speed Abstract A digital meter for measuring the rotational speed is introduced in this paper. It is controlled by an MCS-51 series single-chip microcomputer 8032. It contains the following features: rational design, high accuracy, wide measurability range and powerful function and dependability. Moreover, it is very nimble and convenient to use. The work principle is presented in detail in the paper and the block diagram and program flowchart are given as well. Key works: digital measuring apparatus; rotation speed; single-chip micro-computer The rotor speed control system of industry is one of the important parameters. Mechanical tachometer measuring speed, the rotor contact with the measured object must be to get the synchronous speed, through the internal gear shift instruction after the pointer speed with the size of the header. Use of mechanical tachometer measured object can interfere with movement, especially when measured rotor mass is very small, speed tables on the rotor pressure is not a small additional load, which affects the measurement accuracy. This paper describes a 8032 single-chip microcomputer as the core to the non-contact Digital Tachometer. 1 speed measuring principle The gun speed-sensitive devices with infrared sensors, launched by the specialized infrared detection devices, while receiving reflected back from the measured object infrared, photoelectric conversion into electrical pulses through the signal, does not affect the rotation of the object. Tubes and pipes are fixed in the detection of acceptable shelf, through the lens focus, semi-transparent film not only to the reflected infrared light fired rotating objects, they can rotate the object by the reflected infrared light through the translucent membrane back fired for management. Along the circumference of a rotating body even paste some reflection paper, it directed reflection infrared to receive the reflected