Plant sensor

Details Plant sensor Plant sensor

2011-03-22

2011-03-22

Lee, John R (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S341800

Reexamination Certificate

active

07910876

ABSTRACT:
A plant sensor includes a light source section having first and second light emitters configured to irradiate first and second measuring light toward an object to be measured, respectively, and a light receiver configured to receive reflected light from the object to be measured, and output light-receiving signals. A controller is configured to control emission of the first and second light emitters at a different timing, an integrator is configured to integrate the light-receiving signals, and output an integration signal, and a calculator is configured to calculate, according to the integration signal, a reflection rate as a ratio of light intensity of the reflected light of the first measuring light from the object to be measured to light intensity of the first measuring light, a reflection rate as a ratio of light intensity of the reflected light of the second measuring light from the object to be measured to light intensity of the second measuring light, and to obtain information regarding a growing condition of the object to be measured.

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patent: 2010/0053628 (2010-03-01), Kumagai et al.
European Search Report issued Dec. 17, 2009 in EP 09 01 1043.

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