| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for attaching more importance to the internal flesh firmness of fresh products than to their surface firmness and satisfactorily determining the flesh firmness of the fresh products. SOLUTION: A fresh product to be measured F is irradiated with irradiation light L1 from a light source 2, and transmitted light L2 transmitted through the fresh product to be measured F is detected by an optical detector 4 to determine flesh firmness at an arithmetic processing part 10. The flesh firmness indicates the ripeness of the fresh product to be measured F. On the basis of the intensity of the irradiation light L1 and the intensity of the transmitted light L2, an absorbance secondary differential value at a predetermined wavelength in the fresh product to be measured F is computed, and the flesh firmness is determined on the basis of the magnitude of the computed value. As the absorbance secondary differential value is corrected by temperature obtained by non-contact measurement on the fresh product to be measured F by a temperature measuring device 12 to obtain a temperature-corrected absorbance secondary differential value, it is possible to determine the fresh firmness at the arithmetic processing part 10 according to the magnitude of the temperature- corrected absorbance secondary differential value.</p> |
