Concrete filling level detecting sensor and detecting method

Abstract

PURPOSE: To detect a very small pressure in the neighborhood of a placed concrete surface by making a concrete pressure act on a tape switch as a concentrated load via a flexible tube, a pressure receiving plate and a pressing body. CONSTITUTION: A tape switch 4 is fixed to the surface of a sensor plate 3. The tape switch 4 has tape-like endless contacts with free lengths. When the tape switch 4 has tape-like endless contacts with free lengths. When the tape switch 4 is pressed, two electrodes provided inside as separated from each other are connected to each other to become conductive. Since, when a concrete pressure acts as a concentrated load on the switch 4 via a flexible tube 10, a pressure receiving plate 9 and a pressing body 7, electrodes in the switch 4 are pressed to become conductive, a very small pressure in the neighborhood of a placed concrete surface can be detected. COPYRIGHT: (C)1991,JPO&Japio

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    JP-2008144385-AJune 26, 2008Maeda Corp, 前田建設工業株式会社Apparatus and method for detecting height of placing of concrete