Method for detecting plant growth amount, plant sensor, and fertilizing apparatus
AssigneeTopcon Corporation
InventorShugo Akiyama
Life of this patent
Estimating the term…
Abstract
A scan using a pulsed distance measuring light with two wavelengths of which reflectances are different with respect to a content of a nitrogen by a laser scanner, the two wavelengths are separated, lights are received, a distance measurement value and a light amount are detected for each pulsed distance measuring light and for each of the two wavelengths, a height of a crop is detected based on the distance measurement value, a received light amount ratio of the two wavelengths is detected, and a growth condition of the crop is detected based on the detected height and the received light amount ratio.
Claims9
A method for detecting a plant growth amount comprising:
- performing a scan using a pulsed distance measuring lights with two respective wavelengths, of which reflectances are different with respect to a content of a nitrogen, by a laser scanner, separating said two wavelengths, receiving separated lights,
- detecting a distance measurement value and a light amount for each pulsed distance measuring light and for each of said two wavelengths, detecting a height of a crop based on said distance measurement value, detecting a received light amount ratio of said two wavelengths, and detecting a growth condition of said crop based on said detected height and said received light amount ratio.
A plant sensor comprising:
- a laser scanner which includes a light emitter for emitting pulsed distance measuring lights with two respective wavelengths, a scan mirror for scanning said pulsed distance measuring lights, a light receiver for receiving a reflected pulsed distance measuring light from an object for each pulsed distance measuring lights and for each of said two wavelengths, and a distance measuring module for obtaining a distance measurement value for each pulsed distance measuring light and for each wavelength,
- a light amount detector for detecting a received light amount of a reflected pulsed distance measuring light received by said light receiver for each pulsed distance measuring light, and a growth amount/fertilizer amount calculating module, wherein said growth amount/fertilizer amount calculating module is configured to detect a distance measurement value and a light amount for each pulsed distance measuring light and for each of said two wavelengths, to calculate a height of a crop based on said distance measurement value, to detect a received light amount ratio of said two wavelengths, to calculate a growth condition of said crop based on said detected height and said received light amount ratio, and to detect a plant growth amount based on two calculation results.
Dependencies are inferred from the claim text.