Topcon Corporation

Kabushiki Kaisha Topcon

Idemitsu Kosan Company, Limited

Asahi Fiber Glass Company, Limited

Peng Zhao

Kaoru Kumagai

Kunihiro Hayashi

Shinobu Yamao

Shugo Akiyama

Keiji Sekine

Issei Hanya

Minoru Yabukami

Yoshimitsu Nakajima

Yuji Shirane

Masashi Funahashi

Koji Hayata

To provide a plant sensor device capable of obtaining a parameter to determine a growth status other than a spectroscopy vegetation index without increasing its configuration. The plant sensor device includes a light emission part for emitting a measurement light to irradiate a target plant, a light receiving part for receiving a reflected light from the target plant, and a control section for controlling the light emission part and light receiving part. The control section determines a spectroscopy vegetation index of the target plant by obtaining a reflection rate of the target plant based on the measurement light and reflected light. The control section calculates a distance from the target plant to the light emission part in accordance with the measurement light and reflected light, and determines a plant height of the target plant based on the distance.

Sensor device for plants having a spectroscopy vegetation index and height of the target plant determination

A method of measuring a state of concrete includes emitting an irradiation light to the concrete, the irradiation light including a wavelength range of near infrared light related to concrete measurement; and receiving a reflection light of the irradiation light P reflected on the concrete. At least five wavelengths &#x3bb;to &#x3bb;to &#x3bb;, different from each other by PLS regression analysis within a wavelength range of 900 nm to 2500 nm of absorption spectrum, are determined, and a degree of neutralization of the concrete caused by calcium hydroxide and a concentration of chloride ion is estimated.

Method of measuring state of concrete

A plant sensor includes a first light emitter to emit first measuring light with a first wavelength to irradiate a growing condition measurement target therewith; a second light emitter to emit second measuring light with a second wavelength to irradiate the growing condition measurement target therewith; a light receiver to receive reflected light of each of the first and second measuring light from the growing condition measurement target and output a received light signal; a controller to control light emission; a light path merging unit to merge a first outgoing light path of the first measuring light from the first light emitter and a second outgoing light path of the second measuring light from the second light emitter; and a common outgoing light path connecting the light path merging unit to a light exit portion emitting the first measuring light and the second measuring light.

Plant sensor having a controller controlling light emission of first and second light emitters at timings different from each other

Growing community of inventors

Tokyo, Japan

Peng Zhao