초록 ▼

A remotely-controlled unmanned mobile device (UMD) adapted to function as a robot scout to enter and reconnoiter the site of a disaster and to communicate to a rescue mission information regarding conditions prevailing at the site, making it possible for the mission to decide on rescue measures appr

A remotely-controlled unmanned mobile device (UMD) adapted to function as a robot scout to enter and reconnoiter the site of a disaster and to communicate to a rescue mission information regarding conditions prevailing at the site, making it possible for the mission to decide on rescue measures appropriate to these conditions. The UMD is operable in either of two modes. In its air-mobility mode the UMD is able to vertically take off and land, to fly to the site and then hover thereover. In its ground-mobility mode, the UMD can walk on legs over difficult terrain and through wrecked structures and ruins. The UMD is provided with condition-sensitive sensors for gathering data regarding conditions prevailing at the site, and position-sensitive sensors for avoiding obstacles in the path of the walking UMD, thereby assuring safe mobility. Other sensors govern geo-referenced navigation and flight control functions.

대표청구항 ▼

A remotely-controlled unmanned mobile device (UMD) adapted to function as a robot scout to enter and reconnoiter the site of a disaster and to communicate to a rescue mission information regarding conditions prevailing at the site, making it possible for the mission to decide on rescue measures appr

A remotely-controlled unmanned mobile device (UMD) adapted to function as a robot scout to enter and reconnoiter the site of a disaster and to communicate to a rescue mission information regarding conditions prevailing at the site, making it possible for the mission to decide on rescue measures appropriate to these conditions. The UMD is operable in either of two modes. In its air-mobility mode the UMD is able to vertically take off and land, to fly to the site and then hover thereover. In its ground-mobility mode, the UMD can walk on legs over difficult terrain and through wrecked structures and ruins. The UMD is provided with condition-sensitive sensors for gathering data regarding conditions prevailing at the site, and position-sensitive sensors for avoiding obstacles in the path of the walking UMD, thereby assuring safe mobility. Other sensors govern geo-referenced navigation and flight control functions. -tri-amine-penta-acetic acid, ethylen-di-oxy-bis(ethylen-nitrilo)-tetra-acetic acid, (N-(2-hydroxy-ethyl)-ethylen-diamin-N,N',N'-tri-acetic acid, tri-ethylen-tetra-amine-hexa-acetic acid, N-(hydroxyethyl) ethylene-di-amine-tri-acetic acid and mixtures thereof. 13. A drilling fluid, which contains a modified cellulose product according to claim 1. 14. A drilling fluid according to claim 13, wherein the concentration of the modified cellulose product is 0.1-15 kg/m3. 15. A drilling fluid according to claim 13, further comprising a glycol. 16. A drilling fluid according to claim 13, further comprising a salt for enhancing shale inhibition. 17. A drilling fluid according to claim 16, wherein the salt is KCl. 18. A method for inhibiting shale hydration during drilling comprising drilling in the presence of a drilling fluid of claim 13. 19. A ligand-modified cellulose product consisting of cellulose ether, and at least one ligand selected from the group consisting of nitrilo-tri-acetic acid, ethylene-diamine-tetra-acetic acid, 1,2-cyclo-hexan-di-amin-N,N,N',N'-tetra-acetic acid, diethylene-tri-amine-penta-acetic acid, ethylene-di-oxy-bis(ethylene-nitrilo)-tetraacetic acid, N-(2-hydroxy-ethyl)-ethylene-diamine-N,N,N'-tri-acetic acid, triethylene-tetra-amine-hexa-acetic acid, N-(hydroxyethyl)ethylene-di-amine-triacetic acid and mixtures thereof. 20. A product of claim 1, wherein the calcium salt is CaCl2.2H2O or Ca(OH)2. 21. A drilling fluid comprising the modified cellulose product of claim 1 and a compound suitable for a drilling fluid. 22. A drilling fluid of claim 21, further comprising a glycol or a slat for enhancing shale hydration.