Visible light-near infrared ray-based nondestructive detection device and detection method for cane sugar

The invention provides a cane sugar nondestructive testing device and method based on visible light-near infrared rays. The detection device is formed by combining a handle and a detection head, and the detection box capable of elastically moving and the elastic gasket capable of elastically moving are used for jointly constructing a sample detection position capable of elastically opening and closing in structural design, so that cylindrical sugarcane samples with different sizes can be conveniently clamped for detection; and moreover, not only can the harvested sugarcane be detected, but also the unharvested sugarcane can be directly detected on site. The detection method comprises the steps of selecting a sugarcane sample, obtaining the voltage of a reference rod, obtaining the voltage of the sugarcane sample, calculating the light absorption value of the sugarcane sample, measuring the true sugar value of the sugarcane sample, establishing a sugar prediction model and the like, the voltage of the referenc