Estimation of the States of Cooked Cocoons by Impulse Response Method

Abstract

Measuring the state of cooked cocoons by impulse response method was experimented.
Some of the experimental results were as follows:
1. With the progress of cooking of cocoons the impulse response waveforms of cocoons which were shown in damping curve (Fig. 4) showed the tendency of higher values of the first peak Xh, and also this progress resulted in higher value of the logarithmic decrement δ, larger difference of h between the original level and convergence level, and lower value of the frequency f.
2. The method which developed the cooking state of cocoons was discussed.
As a result, in this method the Xh values of impulse response waveforms indicated the cooking states of cocoons such as Under cooking, Mediumm cooking and Over cooking (Fig. 7).
In case that the distance between the original level and convergence level of the impulse response waveform (h) was observed and the logarithmic decrement δ was in the value of 0.37-0.38, the cocoons were found to be in a well cooked condition.
3. The state of cooked cocoons was measured instantaneously and estimated by this method.
Therefore this method can be applied for the estimation of cocoons state instead of the cocoon cooking-technician in silk production process.