摘要:
A mixing machine for mixing a fluid product contained in a container, comprising one or more mixing devices, each able to mix the product according to a determinate mixing cycle chosen from a plurality of elementary mixing cycles. A command and control unit has a first memory in which the operating sequences of the plurality of elementary mixing cycles are memorized, and is connected to a data introduction device associated with a second memory in which the characteristics of the container or of the product to be mixed are memorized. Each operating sequence of the determinate mixing cycle is pre-defined according to the characteristics memorized in the second memory.
摘要:
The invention provides ‘thixotropy’ monitoring, by measuring the reversible, time-dependent reduction in viscosity occurring when concrete is subjected to mixing, and employs a mixing drum and conventional slump monitoring equipment as used on ready-mix trucks. In one embodiment, the drum is rotated until concrete is completely mixed; the speed is altered, such as by increasing it to a predetermined level; and the energy required to rotate the drum (ER) is monitored; the maximum (ER-MAX) and minimum (ER-MIN) values are recorded in computer memory; and these values are compared to pre-determined (target) values. Rheology factors (including viscosity, yield stress, and/or thixotropy) can be adjusted accordingly by adding liquid component(s) into the mix. This method, suitable for delivery of highly fluid concrete speed such as SCC, can involve transit and placement rheology targets during monitoring.
摘要:
A parameter value estimator is provided for a process performed primarily to control emission of a particular non-particulate pollutant, such as NOx and SO2, into the air. The process has multiple process parameters (MPPs) including a parameter representing an amount of the particular non-particulate pollutant emitted. The parameter value estimator includes either a neural network process model or a non-neural network process model. In either case the model represents a relationship between one of the MPPs, other than the parameter representing the amount of the emitted particular non-particulate pollutant, and one or more other of the MPPs. Also included is a processor configured with the logic, e.g. programmed software, to estimate a value of the one MPP based on a value of each of the one or more other MPPs and the one model.
摘要:
A storage unit for biological samples has a horizontal footprint and multiple storage compartments separated by intermediate walls and enclosed by a peripheral frame. The storage compartments have first and second openings and are tailored to the shape of a biopsy cassette or a glass slide and have a retention mechanism preventing the essentially vertical cassettes or slides in the storage compartments through the first opening and/or the second opening from falling out through the first opening and/or the second opening. A transfer system allows at least two storage units or at least one storage unit and one collection unit to be situated one above the other in register and displaced in relation to one another. The transfer system has a manipulator by which a biopsy cassette or a glass slide may be pushed from one storage unit to another, or into the collection unit.
摘要:
A system and method is described to measure condensed phase and gas phase by-products in the production of chemically cross-linked polyethylene products and, further, for control of the production process.
摘要:
A modular boiler system includes a boiler control, a first boiler in operative connection with the boiler control, and a temperature sensor in operative connection with the first boiler. The system also features at least one secondary boiler in operative connection with the master boiler. The boiler control is operatively connected to only the first boiler and it enables the first boiler to control a boiler parameter of the first boiler and the at least one secondary boiler.
摘要:
The invention relates to the control and regulation of a vibration isolation system with a number of vibration signal transducers for providing analogue sensor signals and a number of actuators for suppressing vibrations by processing the sensor signals to form actuator actuation signals for driving the actuators. One object of the invention is to demonstrate a way which enables high-quality parameterizability and regulating performance over a considerably wider frequency bandwidth of a vibration isolation system to be regulated. The invention proposes digitizing some of the sensor signals provided and processing them to form digital actuator actuation signals and processing other sensor signals provided in an analogue manner to form analogue actuator actuation signals and combining the digital actuator actuation signals and the analogue actuator actuation signals to form common actuator actuation signals which are supplied to the actuators in order to drive them.
摘要:
A controller is provided for directing control of a process performed to control an amount of a pollutant emitted into the air. The process has multiple process parameters (MPPs) The controller includes either a neural network process model or a non-neural network process model. Whichever type model is included, it will represent a relationship between one of the MPPs and other of the MPPs. The controller also includes a control processor having the logic to determine the validity of a measured value of the one MPP based on the one model. The control processor directs control of the process in accordance with the measured value of the one MPP only if the measured value of the one MPP is determined to be valid. On the other hand, if the measured value is determined to be invalid, the control processor may direct control of the process in accordance with an estimated value of the one MPP.
摘要:
A process control system and a method for detecting abnormal events in a process, the process comprising one or more independent and one or more dependent variables a means for measuring values of the dependent and independent variables, and a multivariable predictive control means capable of calculating predicted values of the one or more dependent variables from the measured values of the one or more independent variables using a predictive model, which method comprises performing principal components analysis on the residual values of the one or more dependent variables, the residual values being calculated from the difference between the predicted and measured dependent variable values.