|
The thesis introduces one kind of three dimensional scanning probe system for measuring oil tube threads, discourses on measuring theory, mechanical structure, analog and control circuitry and the software system of the system. It has resolved the problem of measuring the threads in high precision with a common coordination machine for the user. The thesis describes the classification and development of 3D coordination probes. In view of the practical problem of the user, the thesis offers an original scheme of adopting a special 3D scanning probe. According to the measuring principle, we carry out mechanical design, fulfill the designing of sensor analog circuit, probe control circuit and communication system, and program corresponding software. The probe adopts an improved three stories form so that it is closely arranged and has complete function; it adopts high precision sensors, an electric and magnetic zero fixing system and a unique spring force-testing drive system. The fine designing has made an on analog circuitry and control system in order to ensure the property and accuracy. The total probe system simultaneously has the principal function of a micro-metrical probe and the special function of the thread measuring. The description of this article is divided into several sections for the system. Except the contents of the article, in the designing of mechanical structure, we also carry out the designing of Z direction self-weight balance and damping structure, force-testing drive and precision zeroing structure, precision positioning and releasing structure and safety protection structure. Those structures adopt a unique version for decreasing volume and enhancing the precision. We design the sensor and oscillatory circuits, phase detecting and impulse trigger circuits. The distinctive features are that the fore- amplifier is mounted in the probe and the total system adopts the suitable chips with high accuracy and reliability. The control and communication systems adopt the intelligence system that is based on INTER 8098 chip microcomputer, the cost is cheap and the reliability is good. In this article, the hardware and software are described individually.
|
