[Problem] To provide a sludge thickness measurement method and a sludge thickness measurement device which can measure the surface of a sludge layer and the depth of a bottom surface by transmitting and receiving an ultrasonic wave of one wavelength. [Solution] The present invention causes a high frequency ultrasonic wave, which is reflected by the surface and bottom surface of a sludge layer, to be transmitted and received, wherein the distance from a transceiver to an outer edge of an irradiation radius at an assumed surface depth of the sludge layer is shorter than the distance from the transceiver to an irradiation center at an assumed bottom surface depth of the sludge layer. Due to a bottom surface reflection wave reflected from the center of the bottom surface of the sludge layer being received later than a surface reflection wave reflected from an outer edge of an irradiation range of the surface of the sludge layer, the thickness of the sludge layer can be estimated by transmitting one high frequency ultrasonic wave.
[Summary]
A shell element that can be formed simply and in a short time, a shell structure using the shell element, and a structure forming set that can form the shell element simply and in a short time are provided.
Resin material is foamed on the inside of thin film, a foamed material portion with bubbles being mixed is in the state of being sandwiched by the thin film and a solid layer, and tensional stress is applied to the thin film and the solid layer and compressive stress is applied to the foamed material portion, thus the shell element is difficult to be cracked or split, and the shell structure is formed by the shell element. And, the shell structure forming set forms the shell structure easily.
E04H 1/12 - Petits bâtiments ou autres constructions pour occupation limitée, élevés en plein air ou aménagés à l'intérieur de bâtiments, p. ex. kiosques, abris pour arrêts d'autobus ou pour stations de distribution d'essence, toits pour quais de gare, guérites de gardien ou cabines de bains
B05B 15/00 - Parties constitutives des installations ou des appareillages de pulvérisation non prévus ailleursAccessoires
E04H 15/20 - Tentes ou abris provisoires, en général gonflables, p. ex. dressés, renforcés ou supportés par un fluide sous pression
E04H 15/32 - Parties constitutives, composants, éléments constructifs, accessoires, équipement intérieur spécialement conçus pour les tentes, p. ex. cordes, bordures inférieures, entrées
E04H 15/18 - Tentes à couverture à sections multiples, p. ex. pavillons, tentes en forme de voûtes, marquises, chapiteauxTentes multiples, p. ex. à unités
E04H 1/02 - Maisons d'habitationBâtiments pour habitation temporaire
E04H 15/22 - Tentes ou abris provisoires, en général gonflables, p. ex. dressés, renforcés ou supportés par un fluide sous pression supportées par pression d'air à l'intérieur de la tente
E04H 15/54 - Couvertures de tentes ou d'abris provisoires
E04B 7/10 - Structures en coque, p. ex. de forme hyperbolique-paraboliqueConformations en forme de grille jouant le rôle de structures en coqueStructures pliées
E04G 11/04 - Coffres, coffrages ou faux œuvre pour la fabrication des murs, planchers, plafonds ou toits pour des constructions de forme sphérique, sphéroïdale ou similaire ou pour des coupoles à section horizontale ou verticale, circulaire ou polygonaleCoffrages gonflables
3.
SHELL BODY, SHELL STRUCTURE, AND STRUCTURE FORMATION SET
The purpose is to provide a shell body that can be easily formed in a short time, a shell structure using this shell body, and a structure formation set that can easily form this shell body in a short time. In a state in which a resin material is foamed into a thin film body and a bubble-added material body in which air is added is sandwiched between the thin film body and a hardening film, a tensile stress is applied to the thin film body and the hardening film, a compressive stress is applied to the bubble-added material body, a shell body that is hard to split is formed, and a shell structure is formed with this shell body. In addition, a structure formation set that easily forms the shell structure is achieved.
brevets
