To precisely detect the filled situation of a form of fluid, such as concrete and grout, and a sheath pipe, or the like in civil execution or construction execution into a space to be filled, and a corroded state of a steel material, or the like by radio communication and with low consumption power without damaging the durability of the concrete.
There are provided: a pair of electrodes 10a, 10b; a resistor 11 inserted between the electrodes 10a, 10b; a fill detection section 2 for detecting the electrical characteristics between the electrodes by applying voltage between the electrodes 10a, 10b; a steel material, or a metal member 10c for detection provided near the steel material; a corrosion detection section 2 for detecting the corrosion of a member 10c for detection by measuring the electrical characteristics of the member for detection; and a radio communication section 3 for transmitting the detected result by the fill detection section 2 and the corrosion detection section 2 to a reading apparatus by radio.
KANEDA YOSHIHISA
TOYAMA MASAAKI
NAGAOKA SHINJI
SATO TATSUZO
KONUMA RYOHEI
DEGUCHI FUJIO
ITO SABURO
ABE HIROYUKI
HARA KENGO
OKI ELECTRIC IND CO LTD
OKI COMM SYSTEMS CO LTD
ORIENTAL CONSTRUCTION CO LTD
Yoichi Shirakawa