Microprocessor-controlled torque

The prevalent design is a microprocessor-controlled torque rheometer. The system consists of two basic units an electromechanical drive unit and a microprocessor unit. The basic system is shown in Figure 7. 

The winch continuously controls and minimizes the traction force and torque exerted on the vehicle by the cable. It is located about 6 m above the upper part of the slab. In the event of emergency it can extract the vehicle from the space between the tanks. Control of the MIR system is achieved by a hierarchical computer system. A microprocessor carries out elementary orders and checks. 

Central Electronics Engineering Research Institute, Pilani has developed an accurate and reliable microprocessor-based industrial grade 24-channel temperature controller (Micro-TEIMAC) which has been successfully field-tried in a few sugar factories of U.P. and Maharashtra. A unique feature of the Micro-TEIMAC system is the twenty-four channel controller. It provides 4-20 mA PID controller current output and helps in controlling the temperature of all the twenty-four channels automatically either with the help of stepper motor driven low torque valves or pneumatically controlled high torque valves and manually with the help of control status and deviation indicators by providing visual indication to the valve operator. In addition to this controller displays actual deviation of process temperature from set point in the form of bar graph for all 24-process points and has the facility to connect recorder to all points. 

The block diagram of Micro-TEIMAC system is shown in Fig. 1. It comprises of i) 8086 microprocessor-based microcomputer, ii) Precision 4 1/2-digit industrial grade thermometer, iii) Low offset 24-point scanner multiplexer, (iv) Digital indicating end monitoring panel, v) 24-channel controller, vi) Control status and deviation indicator, vii) Stepper motor operated low torque valve, and viii) Electro-pneumatically controlled high torque valve... 

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