Aimed at solving the defects existing in the analog transmitter instruments controlling procedure of pulp concentration low precision and stability,high power consumption and expensive maintenance cost,an intelligence transmitter with CAN bus communication function for pulp consistency control was described.

The algorithm and the learning rule of the neuron adaptive PID controller for pulp consistency control system are described in this paper.

At the last part of the paper, it expounded the method and procedure of system trial-run and experimental analysis on the system network communi- cation, pulp consistency and multi-dryer steam temperature test-control performances, besides, with the help of MATLAB simulator software, simulated analysis on the parameters fuzzy self-set PID control algorithm used in pulp consistency control.

Development of on-line measurement system for size concentration by ultrasonic technology;

Trial Analyses of Size Concentration Control Principle of HS30 PW Sizing Machine;

The relation between size pick-up and size concentra- tion as well as the importance of measuring size concentration are discussed in this article.

Measurement of slurry concentration in stirred vessel based on AE measurement by wavelet transform;

A method for calculating the slurry concentration inside the reactor was developed in this paper through determining the slurry density of polypropylene with double - flange pressure transmitter.

The slurry concentration, minimum agitation speed and slurry suspension height, as the basic parameters in the solid-liquid system, is very important to the design and optimization of the reactors.