This paper introduces a type of circuit which can digitize signal of inductosyn by AD2S90. With low cost simple structure and highly accuracy etc, the circuit works in phase demodulation and has multi\|mode of output included serial data and incremental encoder emulation. Its can be connected with device of digital read or CNC expediently.
The edge transition of pulses from incremental encoder can be detected with double frequency to improve measurement precision, and to avoid measurement errors and accumulative errors.
Working principle, framework and working flow chart of the system has been illustrated and the paper explains the selecting principle and the parameters setting of the imaging equipments, such as line CCD camera and image grabber. The system can capture the image of the object that is moving at a high speed, and it can deal with the image message at real time.
The experimental adjustment work demonstrates that this scheme is easily-realized,and has high reliability in addition,it overcomes some defects in increment-encoding-rate system by using lockingphase circuit.
A friction loaded cycle ergometer was instrumented with a strain gauge and an incremental encoder to obtain accurate measurement of human mechanical work output during the acceleration phase of a cycling sprint.
Both systems employ an optical incremental encoder and both contain two feedback loops: a minor closed-loop (MCL) feeding back a step angle signal and a major closed-loop for position feedback.
TP801 one chip mini-computer is used on the wiper angle testion. This testing circuit uses a few expansion elements to form a photoelectric increment device. The direction determind,operation limit measured and the angle pulse signals counted are realized by respectively using a general D triggre.a voltage comparator, and circuit of counter timer. It is pointed out that the testing accuracy of this device can assure the needs in practical application.
This Paper introduces principles of high - accuracy - rate system based on phase difference to voltage converting and realization of hardware circuit,it also goes into details on the keytechniques of each part. The experimental adjustment work demonstrates that this scheme is easily-realized,and has high reliability in addition,it overcomes some defects in increment-encoding-rate system by using lockingphase circuit.
Incremental motion encoder (IME) is a new type of transducer for shaft center trace measurement with resolution up to sub-micro. It not only has wide measuring range and high precision but is not affected by the property of a measuring system and not interfered by electromagnetic noise because it is a typical digital transducer without analogous amplification and filter. It combines both functions of torsion sensor and shaft center position sensor in one and has wide application prospects in the field of be...