In-situ plant analysis apparatus, method for tracking the state or evolution of a culture and method for managing vegetable processing

A device (1) for the non-destructive analysis of plants by fluorescence measurement, comprising:

• excitation means (20, 30) emitting excitation light (29, 39) in first plural different wavelength bands (61, 62, 63), without contact with a target zone (91) of a plant located in air, the target zone of the plant being spaced apart from the excitation means by an air space, the excitation light being emitted, through the air space towards the target zone, in the first plural determined wavelength bands, the excitation light being suitable for generating a fluorescence (49) in tissues of the plant in the target zone (91) illuminated by the excitation light;
• detection means (40) for directly receiving the fluorescence light (49) thus generated in each of second plural different wavelength bands (65, 66, 67), the detection means being free of contact with the plant and separated from the plant by the air space, and
• processing means arranged for dynamically correlating said excitation and detection means so as to provide a measurement of the fluorescence light thus generated, wherein,
• the excitation means and the detection means are arranged according to a determined geometry in order that the direction of the excitation light (29, 39) illuminating said target zone (91) and the direction of the generated fluorescence light (49) detected by the detection means are not collinear with each other, and
• the excitation means include a set of at least two light emitters (21, 24) emitting light in a common wavelength band, the at least two light emitters (21, 24) situated on opposite sides of the detection means (41, 42, 43) or distributed around said detection means, the light emitters illuminating the target zone (91) with the emitted light in the common wavelength band from opposite sides or from distributed positions of the detection means and through the air space towards the target zone of the plant.