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Interference-resistant method and device for measuring the width of hot-rolled and cold-rolled coil
With the development and application of high-tech instruments in todays engineering technology, the accuracy and stability of measuring instruments are more and more valued and required by users, so as to provide a basis for making decisions in the production process of many products.The hot-rolled and cold-rolled coils are among the most widely used in many production processes.Using the width measurement of hot-rolled and cold-rolled coils, the quality of the entire process can be balanced, and the requirements for the consistency of the width during the downstream process can also be economically achieved.
The width inspection of hot-rolled and cold-rolled coils is usually performed with a dedicated width measurement instrument.However, due to the long conveying distance of hot-rolled and cold-rolled coil inspections, the environmental interference factors and the mechanical wear of the instruments, the performance of these instruments tends to deteriorate, resulting in inaccurate measurements of the width of the coils.The above factors limit the accuracy of the instrument,which will seriously affect the quality and accuracy of products.Therefore, it is crucial to find a reliable and accurate method to detect the width of the hot-rolled and cold-rolled coils.
The interference-resistant method of measuring the width of hot-rolled and cold-rolled coils is mainly by making some improvements on the detecting instrument, which can enhance the immunity of the instrument to various disturbances such as noise, vibration, magnetic field and acceleration.To achieve interference resistant width measurement, a series of process measures are needed.
First, it is necessary to improve the design of the whole mechanism of the measuring instrument and make it as compact as possible.This reduces the mechanical wear of the instrument and reduces the likelihood of interference from external environmental factors.In addition, stiffening structures should be added to the instrument to reduce the deformation of mechanical static and dynamic characteristics caused by external factors.
Secondly, it is essential to strengthen the frequency characteristics of the instrument circuit, for shielding or reducing the external interference signal.The design of the circuit should be improved to ensure high signal-to-noise ratio(SNR) and good linearity.Under the premise of ensuring the accuracy of the circuit parameters, the stray capacitance of the circuit should be reduced to improve its frequency characteristics.
whats more, the installation design of the detector board and the control board should be ideal. The signal line should be shortened as much as possible, and the signal line should be placed away from the power line and other strong electromagnetic signal sources to prevent signal interference.In addition, the installation offsets of the components on the circuit board should be minimized to avoid the influence of crosstalk and mutual interference on the signal.
Finally, the noise suppression measures should be taken in the instrument circuit design. By controlling the total common-mode voltage of all signal lines, the amplitude of the common-mode noise can be reduced, so as to reduce the amount of interference entering the circuit and improve the SNR of the signal.
In conclusion, the above improvement measures will effectively improve the accuracy, stability and interference resistance of the measuring instrument, which is of great significance for improving the measuring accuracy of the width of hot-rolled and cold-rolled coils.
