摘要:
The invention relates to a force sensor with two force input elements (3,5/6), to which the force for measuring and the support force (11) are supplied, whereby both force input elements are embodied to be essentially rotationally symmetrical, separated in the axial direction and the force for measuring and the support force are introduced in the radial direction. A spring element (2), arranged in the axial direction between the both force input elements, connects the same and the load-dependent deformation thereof is converted into an electrical signal, for example, by means of strain measurement strips (25). According to the invention, a suppression of transverse forces can be achieved in a purely mechanical manner to such a degree that the influence of transverse forces on the output signal of the force sensor can be ignored, whereby the both force input elements (3,5/6) are additionally connected to each other by means of a guide element (42) which encloses the spring element (2) and which comprises two connectors (44) as parallel guide, significantly softer in the direction of the force (11) to be measured than in the direction perpendicular thereto.
摘要:
The invention relates to a membrane-electrode unit and to polymer electrolyte fuel cells composed thereof in a working temperature of up to 250 °C and to polymer membranes therefor, as well as to methods for the production thereof. Membrane-electrode units of the polymer electrolyte fuel cells are at least comprised of two flat gas diffusion electrodes and of a polymer membrane, which is arranged therebetween in a sandwich-like manner and which has at least one basis polymer and one dopant, with which the gas diffusion electrodes are charged in such a manner that they constitute a dopant reservoir for the polymer membrane. After the action of pressure and temperature, this polymer membrane is, via the dopant, connected in a proton-conducting and fixed manner to the gas diffuser electrodes. When doped, the polymer membrane has a conductivity of at least 0.1 S/m at a temperature of no lower than 25 °C. The invention can be used for the stationary and mobile production of electric current directly from chemical energy.
摘要:
The invention relates to a weigh sensor comprising a part (110/111/112) affixed to the housing and a load sensor (102) that is movably connected to the part affixed to the housing by means of a parallel guide consisting of a top arm (103) and a bottom arm (104). According to the invention, heating or cooling elements (120, 121) are provided, said elements locally modifying the temperature in the load sensor (102) and/or the part (110) affixed to the housing between the supporting points of the top and bottom arms relative to the rest of the weigh sensor. As a result of thermal dilation coefficients of the material of the weigh sensor, the vertical distance between the top and bottom arms is slightly modified with the purpose of adjusting corner load. This makes it possible to carry out fine adjustment of the corner load without having to perform any mechanical operations in the weigh sensor while only using electrical means.
摘要:
The invention relates to a force sensor with two force input elements (3,5/6), to which the force for measuring and the support force (11) are supplied, whereby both force input elements are embodied to be essentially rotationally symmetrical, separated in the axial direction and the force for measuring and the support force are introduced in the radial direction. A spring element (2), arranged in the axial direction between the both force input elements, connects the same and the load-dependent deformation thereof is converted into an electrical signal, for example, by means of strain measurement strips (25). According to the invention, a suppression of transverse forces can be achieved in a purely mechanical manner to such a degree that the influence of transverse forces on the output signal of the force sensor can be ignored, whereby the both force input elements (3,5/6) are additionally connected to each other by means of a guide element (42) which encloses the spring element (2) and which comprises two connectors (44) as parallel guide, significantly softer in the direction of the force (11) to be measured than in the direction perpendicular thereto.
摘要:
The invention relates to porous moulded bodies, in particular membranes, comprising a novel porous structure based on thermoplastic polymers and to a method for producing moulded bodies of this type, in particular membranes. Membranes of this type can be used as filtration membranes.
摘要:
Die Erfindung bezieht sich auf eine Plattformwaage mit einer Lastplattform. Aufgabe der Erfindung ist es, eine Plattformwaage der eingangs genannten Art so weiterzubilden, dass sie auch bei hohem Eigengewicht von einer einzigen Person bewegt werden kann. Erfindungsgemäß wird dies dadurch erreicht, dass die Plattformwaage mindestens drei Fahrrollen aufweist und dass die Fahrrollen höhenverstellbar sind und aus einer Wägestellung, in der die Fahrrollen keinen Kontakt zum Boden haben, in eine Transportstellung, in der die Fahrrollen Kontakt zum Boden haben und die Plattformwaage tragen, bringbar sind.
摘要:
Für eine Waage mit einer Waagschale (2), mit einem Wägeaufnehmer (8), mit einem Gehäuse (1), das den Wägeaufnehmer umschließt, und mit einer Antenne (7) zur Identifikation eines mit einem Transponder (4) ausgerüsteten Wägeobjektes (3), wird vorgeschlagen, dass die Antenne (7) in einer horizontalen Ebene in oder unter der Waagschale (2) angeordnet ist und dass die Waagschale (2) aus einem elektrisch schlecht leitenden Material besteht. Dadurch wird die Antenne fast unsichtbar in die Waage integriert und behindert die Beschickung mit Wägeobjekten nicht.
摘要:
The invention relates to a pocket filter module which is used for filtering fluids and is characterized by having a high filtration capacity and filtration certainty. The membranes of the membrane pocket of the pocket filter are protected from mechanical destruction by the fact that the spacers located inside the membrane pocket are covered by a flat, fluid permeable protecting material on both sides and in the area of the front side, said front side facing the closed end of the membrane pocket, over the entire width and length of the spacers up to the connection of the membrane pocket with the core tube. The inventive pocket filter modules are used for filtration processes in the areas of beverages, foodstuffs, pharmaceuticals, chemicals and laboratories in addition to environmental protection and in biotechnology in which liquid or particulate components such as, for example, proteins, microorganisms, cells, etc. have to be separated and contaminations of the fluids which are to be filtered have to be avoided.
摘要:
The invention concerns a method of separating albumin from serum by ion-exchange chromatography with membrane adsorbers. The method is characterized by high productivity and yields of high-purity albumin to be separated. The method can be used for isolating albumin from human serum. The separation of the albumin is carried out on highly basic anion-exchanger membranes and on highly acidic cation-exchanger membranes. As a result, the albumin fraction can unexpectedly be eluted from the anion-exchanger membrane to be yielded in such a way that it can be applied directly to the cation-exchanger membrane without any special conditioning and the albumin can be extracted therefrom as an end product with a high total yield of at least 84 % and a high degree of purity of at least 97 %.