COFFEE BEAN CRACKING OCCURRENCE SCHEDULE PREDICTION METHOD, COFFEE BEAN CRACKING OCCURRENCE SCHEDULE PREDICTION DEVICE, COFFEE BEAN CRACKING DETECTION METHOD, COFFEE BEAN CRACKING DETECTION DEVICE, AND ROASTED COFFEE BEAN PRODUCTION METHOD

摘要

Provided is a method for easily and accurately detecting or predicting cracking occurrence when roasting coffee beans. A coffee bean cracking detection method according to the present invention comprises: an average value calculation step for calculating an average value of sound pressure during a cracking non-occurrence period, when temporally measuring sound having a frequency in a range included within the range of 5-80 kHz generated from coffee beans that are being roasted and a roasting device; and a cracking detection step for, by using the average value of sound pressure as a threshold, determining that cracking of the coffee beans has been detected if the measured sound pressure exceeds the threshold value and, within a time interval of 0.1-99 milliseconds selected from a time period between the time point of exceeding the threshold value and 0.1-100 milliseconds prior to said time point, if a sound pressure of n-fold (n is more than 1/6 but less than 1/3) of the threshold value has not been detected.