| 摘要 |
FIELD: physics, measurement. ^ SUBSTANCE: method may be used in continuous nondestructive check of physical-mechanical parametres of fibers of vegetal, animal, artificial, synthetic and mineral origin in process of their industrial processing. Prior to detection of parametres, fibers are combed into even bed and are exposed to sonic test at two or more harmonic frequencies. Resulting signals in each point are found as ratio of their values at different values. Sonic test is performed in several points of the carpet. Static processing is used to find average value of signal. Sample of preset mass is taken from carpet, sonic test of which indicated value of relative signal close to average statistical value. Out of selected sample, using available method, staple is produced. Staple is exposed to sonic test at two or more frequencies, relative value of signal is found and, comparing with relative value of signal via initial sample, proportionality coefficient is detected. Afterwards, using any standard method, required parametre is found, bringing it in compliance with relative value of acoustic signal. Then several samples of equal mass are selected from carpet, serially laying them one above another and exposing the growing packet to sonic test at two or more frequencies, dependence of relative signal is built on number of fibres in sonic test channel and accordingly, from required parametre, fixing the point calibrated traditional method on dependence. Afterwards remaining carpet is combed and shaped into tape, passed through draw plate with sensors, exposed to sonic test at two and more frequencies, and using built dependences, average parametres of fibers are detected. ^ EFFECT: provision of possibility to perform uninterrupted monitoring of fibre parametres in technological process, higher accuracy of parametre monitoring due to statistical processing of signals, exclusion of subjective factor. ^ 4 dwg |
