摘要:
For the determination of all linearly independent components of an Nth order gradient tensor of a magnetic field, at least 3+2N planar gradiometers of the Nth order are arranged on at least 3 non-parallel and non-orthogonal surfaces. As a result, three-dimensional coil structures are not necessary.
摘要:
At least five planar gradiometers on at least three non-parallel surfaces are used to determine five, linearly independent components of a gradient tensor of a magnetic field.
摘要:
An apparatus for determining the position of an object comprises a light source positioned in relation to the object so that at least one collimated beam is issued from a particular positon on the object and bearing a fixed and definite geometric relationship to the sought position; a fluorescent foil or plate is positioned in relation to such object such that a particular spot is stimulated by that collimated beam which then provides the fluorescence; a plurality of fiber optics are arranged such that one end of each fiber optics is placed on a particular geometric pattern to receive radiation from the stimulated spot while the respective other end of each fiber optics is arranged in a similar but smaller scale geometric pattern as the first ends are and in relation to a detector that provides an electrical signal representing the position of the object.
摘要:
A drilling tool includes a hydraulically driven device (21) for advancing a drilling head (2) in a bore (5), and a flow limiter (30) arranged in a hydraulic conduit (25) of the advancing device (21) for adjusting an advancing speed of the drilling head (2) in the bore (5), with the flow limiter (30) having a pressure-actuated adjusting member (38) for adjusting flow of a hydraulic fluid in the hydraulic conduit means (25) in accordance with a flow volume of a rinsing fluid (7) for rinsing the bore.
摘要:
A self-drilling connection anchor (10) includes an anchor tube (11), a drilling head (13) provided at the first end (12) of the anchor tube (11), an inner tube (15) arranged in the anchor tube (11) and having an interior space (16) for receiving an ejectable mass (30), a first axial, with respect to the longitudinal axis (L) defined by the anchor tube, opening (18) provided in a region of the second free end (14) that communicates with the interior space (16) of the inner tube (15), at least one outlet opening (20) provided in a region of the drilling head (13), and at least one second radial, with respect to the longitudinal axis (L), opening (19) provided in the region of the free second end (14) and communicating with the at least one outlet opening (20) via an intermediate space (17) formed between the anchor tube (11) and the inner tube (15).
摘要:
The invention relates to an operating method for a regeneration valve of a fuel vapor retention system, particularly of a tank vent valve for regenerating an activated carbon filter during which the regeneration valve is controlled by a control signal, whereby the control signal corresponds to a designated valve position of the regeneration valve. The invention provides that the correlation between the control signal and the resulting valve position of the regeneration valve is determined during a calibration process.
摘要:
A fastening element, which is used in particular in mines and/or tunnel construction, includes an anchoring tube (2), a squeezable-out, one-or multicomponent chemical mass contained in a foil bag (5;25) arranged in the anchoring tube (2;2) between spaced from each other, first stop (7,27) and second stop (9), and at least one pressure application element (14) arranged between the first stop (7,27) and/or the second stop (9) and a respective axial end region (11,12;31) of the foil bag (5;25) for applying pressure to the foil bag (5;25) in a shelf condition of the fastening element (1;21)
摘要:
An anchor rod to be received in a bore filled with mortar mass including a connection region (2, 22, 32) having a plurality of axially arranged one after another, conical enlargements (4, 24, 34) a diameter of which increases in a setting direction and which are provided with circumferential sections (5, 25, 35) radially spaced from a longitudinal axis of the anchor rod (1, 21, 31) by a greatest distance, having a radius (r) smaller by from about 0.1 mm to about 1.5 mm then a half of a nominal diameter of the anchoring region receiving bore, and extending, respectively, in a circumferential direction over an angle of up to 300°.
摘要:
A setting tool for anchor rods of attachment anchors, which have a rear end section (P) having a polygonal cross-section, the setting tool including a housing (2) provided with an insertion end receivable in a chuck of a percussion rotary drill and a rod receptacle (5) provided at an end of the housing opposite, in an axial direction (A), to the insertion end (5), the rod receptacle (5) having an axially extending inner surface (6) provided with at least two ribs (7) projecting therefrom and extending in the axial direction (A), with the ribs (7) defining an inscribed cylinder (Z) having a diameter (x) larger by from about 0.05 mm to about 0.5 mm than a diameter (y) of a circle (K) inscribed in a polygonal cross-section of the rear and section (P) of the anchor rod.