2 results about "Spiral coil" patented technology

The invention discloses a wide-range inductive frequency-modulation type displacement measurement device and a method. The device comprises a shell, a spiral coil, a measuring rod, a pipe body and a data processing module, wherein the spiral coil is arranged on the rear section of the pipe body in a sleeving manner; the data processing module is arranged on the shell; the front-end part of the measuring rod is formed by butting n sections of magnetic cores and can stretch into the pipe body; the magnetic conductivity of the ith magnetic core is 1.5-2 times that of the magnetic conductivity of the (i+1)th section of the magnetic core; i and n refer to integers; n is more than or equal to 2; i is equal to n-1; the length of each section of the magnetic core is smaller than the length of the spiral coil, so that two ends of a single section of the magnetic core stretch in the length range of the spiral coil; and the lengths of the tube body and the measuring rod are larger than the length of the spiral coil. The metal spiral coil with mature and stable process is used, the mode of continuously measuring by virtue of the multi-section measuring rod is adopted, the precision is guaranteed, the range can be widened, and the device is low in cost and easy to implement and can be widely applied to wide-range displacement deformation monitoring in the fields of civil engineering, geological disasters and industries.

The invention provides a double-beam bridge crane which is unlikely to be limited by the height of a plant. The double-beam bridge crane comprises a trolley, a coiling block and a steel wire, wherein the coiling block is arranged on a left beam end and is connected with a motor; the steel wire is wound with a first plane spiral coil and a second spiral coil on the coiling block on the left beam end, and the winding directions of the first plane spiral coil and the second spiral coil are the same; a first trolley wheel and a second trolley wheel are fixed on one side, on a main beam, of the trolley, and a fixed pulley is fixed on one side, on another main beam, of the trolley; a horizontal fixed pulley is fixed on a right beam end; and after forming the first plane spiral coil, the steel wire sequentially bypasses the first trolley wheel, a first movable pulley, the fixed pulley, a second movable pulley, the second trolley pulley and the horizontal fixed pulley and finally winds the coiling block to form the second plane spiral coil. According to the crane, the original operation mechanisms and hoisting mechanism are not used, so that the trolley is lightened and lowered, then the complete machine is lowered, and thus a trolley frame is relatively light and convenient.