53results about How to "Unaffected by temperature changes" patented technology

The invention provides a primary mirror floating support mechanism with a positioning film and belongs to the field of primary mirror support structure of photoelectric instruments. The primary mirror floating support mechanism comprises a mandrel, a second screw, a bottom plate, the positioning film, a pin roll, a disc spring and a four-way joint, wherein the bottom plate is in an annular structure and comprises an annular boss, an annular support boss, a bottom plate central groove and a bottom plate substrate flange; a through hole is arranged in the bottom plate substrate flange, the positioning film is annular, a positioning film central groove is arranged on the inner diameter edge of the positioning film, and a positioning film annular boss is arranged on the outer diameter edge of the positioning film; the four-way joint comprises a primary mirror mounting base and a four-way round table; and a primary mirror mounting hole is formed in the primary mirror mounting base. When the ambient temperature changes, the relative slip between the four-way joint and the bottom plate is caused by the relative extension or contraction deformation quality formed between the four-way joint and the bottom plate, the positioning film central groove can absorb stress through self deformation, the stress is prevented from being transferred to the bottom plate, so that the heat stress between the bottom plate and the four-way joint is released, and the shape of the mirror surface cannot be affected by the temperature change.

The invention discloses an all-fiber sensing belt conveyor weighing device and a weighing method thereof. The weighing device comprises a belt conveyor belt (1), a weighing frame (2), a belt conveyor rolling wheel (3), a fiber weighing sensor, a speed fiber sensor, a fiber splicing box (8) and a control room (16). The belt conveyor rolling wheel (3) is arranged on the weighing frame (2). The belt conveyor belt (1) is arranged on the belt conveyor rolling wheel (3). The fiber weighing sensor is arranged on the weighing frame (2). The speed fiber sensor is connected with the belt conveyor rolling wheel (3). The fiber weighing sensor and the speed fiber sensor are respectively connected with the fiber splicing box (8) via fibers. The fiber splicing box (8) and the control room (16) are connected via the fibers. The control room (16) processes the received signals and displays weighing weight and belt speed. The weighing device is suitable for more accurate weighing of bulk materials in dusty, moist and corrosive operation occasions and / or flammable and explosive operation occasions.

The invention discloses a high-power microwave radiation field measurement device and method based on software radio. The device includes: a receiving antenna, an attenuator, a frequency converter, an A / D converter and a data terminal. The data terminal includes a receiving module, a software A detection module, a data processing module and an output module; among them, the receiving antenna, the attenuation link, the frequency converter, the A / D converter and the data terminal are sequentially connected in series; the receiving module in the data terminal is electrically connected to the A / D converter, and the receiving module , the software detection module, the data processing module and the output module are sequentially connected in series. The invented and designed L-band software detector has a sensitivity dynamic range of about 30dB, a detection voltage of 10mV-700mV, a response time of less than 1ns, high repeatability and stability, and is not affected by temperature and environmental electromagnetic interference.

The invention discloses a platform type horizontal plane planar motion mechanism. The motion mechanism comprises a mechanism frame 14, a straight bearing 8, a roller bearing 15, a ball screw 11 and a swaying servo motor 20, wherein the mechanism frame is connected with an auxiliary trailer 10; an encoder 17 and a swaying frame 9 are connected with the mechanism frame 14 through the straight bearing 8 and the roller bearing 15 to form a swaying component; a composite bearing 12, a worm gear 13, a circumferential guide rail 6, a yawing servo motor 18, an encoder 19 and a connecting plate 5 are connected with the swaying frame 9 through the worm gear 13 to form a yawing component; the distance between a front connecting rod and a rear connecting rod 3 can be adjusted by a positive and negative screw 4; the lengths of the connecting rods 3 can be adjusted by a trapezoidal lead screw 7; and the upper ends of the front connecting rod and the rear connecting rod 3 are connected with the connecting plate 5, while the lower parts are connected with a joint 1, a force balance 2 and a ship model 16. A linear motion guide rail consisting of the straight line bearing and the roller bearing is adopted in the swaying component, so the swaying component has the advantage of high stability, large amplitude, and high precision. A rotary mechanism consisting of the composite bearing, the circumferential guide rail, the worm gear and a worm is used as the yawing moving component, so that the yawing moving component has the advantages of stable rotation, wide range of rotation angle, large torque, high self-locking property and high accuracy. The distance between the front connecting rod and the rear connecting rod and the lengths of the connecting rods are adjusted by using the positive and negative screw and the trapezoidal lead screw, so the mechanism has the advantages of convenience, accuracy and suitability for ship models with various specifications.