32results about How to "Improve measurement work efficiency" patented technology

The present invention relates to the whole cycle fuzziness initializing method for the carrier phase in short-base line DGPS. The present invention designs the position of mobile GPS receiving antenna and the operation steps of extracting observation data as well as corresponding data processing method. The operation of the present invention is simple and practical and the corresponding data processing method can give out accurate and reliable whole cycle fuzziness estimation of carrier phase. The present invention can raise the operation efficiency in the DGPS positioning measurement.

The present invention relates to a stereophotogrammetric survey-based method for obtaining the morphological parameters of a maize plant. The method comprises the steps of (1) forming a rectangular marking ruler by adopting 4-bit typical gray codes, with 1cm as the width of a code element, 1cm as the spacing between adjacent code elements and 2cm as the width of a reference code; (2) in the maize growing season, standing the rectangular marking ruler upright besides a to-be-measured maize plant, photographing by a binocular camera, and obtaining the three-dimensional counterpart of the maize plant with the above rectangular marking ruler as a reference; (3) according to the three-dimensional counterpart, calculating the morphological parameters of the maize plant through referring to the reading data of the rectangular marking ruler. According to the technical scheme of the invention, the maize plant is stereoscopically photographed by the conventional binocular camera, so that the morphological parameters of the maize plant can be obtained. Therefore, the field data acquisition speed and the indoor data processing speed are comprehensively improved. Meanwhile, the measuring and calculating precision and the measuring and calculating efficiency for the form factors of the maize plant are effectively improved.

The invention provides a close-range photogrammetry target positioning method and a close-range photogrammetry target positioning system with a known photographing position. The method comprises the following steps: acquiring a three-dimensional coordinate of a camera station position, namely measuring and acquiring the three-dimensional coordinate of the camera station during image shooting; measuring two-dimensional coordinates of the shot target point image on the image; introducing a unit quaternion to construct a rotation matrix from an image space to an object space; obtaining an initial value of an object space three-dimensional coordinate in a relative orientation manner, carrying out differential calculation on a rotation matrix constructed by the unit quaternion, and establishing an error equation about the unit quaternion; and establishing a unit quaternion constraint condition equation and block adjustment with limited conditions, including performing iterative calculation by using an indirect adjustment method with limited conditions, and solving three-dimensional coordinates of a target point. According to the method, image control points do not need to be arranged, solving of unknown numbers of photography bases during block adjustment is reduced, the method is simple and easy to implement, the measurement speed is high, the operation time is shortened, and the measurement operation efficiency is greatly improved.

The invention belongs to the technical field of section convergence deformation close-range photogrammetry of underground engineering caverns and tunnels and particularly relates to a sectional surrounding rock convergence deformation close-range photogrammetry method. The method comprises steps: 1, a measuring point A and a measuring point B are arranged at a left side and a right side of a surrounding rock section, and a measuring line A-B is obtained; 2, a fixing point A' and a fixing point B' are arranged near the measuring point A and the measuring point B, and the measuring point A, the measuring point B, the fixing point A' and the fixing point B' are ensured to be in a straight line; 3, by adopting the close-range photogrammetry technology, convergence deformation data of a measuring line A-A' and convergence deformation data of a measuring line B-B' are acquired respectively; and 4, summation is carried out on the convergence deformation data acquired in the third step to obtain surrounding rock convergence deformation data. The method of the invention can be particularly applied to the field of convergence deformation or displacement measurement of the surrounding rock section of the underground engineering cavern and the tunnel by adopting the close-range photogrammetry mode based on a non-measurement digital camera situation.

The invention discloses a hand-push roller range finder, a hand-push roller range finder monitoring device and a range finding system. The hand-push roller range finder comprises a hand-push roller range finder main body and a first communication module, the hand-push roller range finder main body is used for completing range finding under the operation of a user to obtain distance measurement data; and the first communication module is used for sending the distance measurement data to the hand-push roller range finder monitoring device through wireless communication connection. According to the hand-push roller range finder, the hand-push roller range finder monitoring device and the range finding system disclosed by the embodiment of the invention, the measurement operation efficiency is improved.

The invention relates to the technical field of surveying and mapping, and provides an underwater longitudinal and transverse section measurement method and system. The method comprises the following steps: obtaining a river-crossing line horizontal curve design file, and generating an unmanned ship measurement plan line; transmitting the unmanned ship measurement plan line to a main control module of the target unmanned ship; enabling the main control module of the target unmanned ship to adjust and update working parameters and acquisition conditions of the unmanned ship according to the received unmanned ship measurement plan line; enabling the target unmanned ship to carry out four-dimensional sampling and water depth detection operation through GNSS equipment and a depth finder carried by the target unmanned ship in an on-line parallel manner; performing coordinate transformation on the acquired GNSS data, performing draught correction on the acquired water depth data, adding an acquisition time identifier to the data, and storing the data according to a time sequence; and after the target unmanned ship completes data acquisition, correcting the projection coordinate data and the water depth data, calculating underwater elevation data, and generating topographic data and/or an underwater longitudinal and transverse section report file.

The invention discloses a forced centering device capable of being freely lifted, recycled and capable of achieving integrated operation. The forced centering device comprises a concrete pier, a steelsleeve, a steel pipe column, an instrument erecting platform and centering screws. The lower portion of the concrete pier is buried underground, a circular lifting channel is formed in the center ofthe concrete pier in the axial direction of the concrete pier, the steel sleeve is embedded from a top opening of the circular lifting channel, and the steel pipe column is matched with the steel sleeve in inner diameter and can extend into the steel sleeve and the circular lifting channel to slide up and down. A plurality of threaded holes are formed in the top of the steel sleeve in different directions of the circumferential face of the steel sleeve, and a nut matched with the corresponding threaded hole is screwed in each threaded hole. The instrument erecting platform is fixed to the topend of the steel pipe column, and centering screws are arranged on the top face of the instrument erecting platform. The device has the advantages of free lifting, recyclability, simple processing andmanufacturing (shaping manufacturing), high construction measurement precision, integrated operation, effective reduction of measurement personnel, remarkable improvement of measurement efficiency and the like.

The invention discloses a wheel rim and tread linkage measuring apparatus comprising a supporting framework and a measuring assembly. The supporting framework comprises a horizontal top arm and at least two vertical arms. A horizontal guiding element passes through the vertical arms. The measuring assembly comprises a wheel rim thickness main measuring plate and a wheel rim width measuring plate which are disposed on the guiding element and which are capable of moving horizontally along the guiding element, an inner positioning plate and a rolling circular positioning contact which are disposed on the free ends of the vertical arms; and a wheel height measuring head and wheel rim auxiliary measuring plate which are capable of moving up and down along the vertical arms. The wheel rim thickness main measuring plate is connected with a measurement transition plate. The wheel rim and tread linkage measuring apparatus may measure all parameters just by one action, achieves an effect of instant contact instant acquisition, greatly increasing measurement efficiency, and may simultaneously QR values if corresponding parts are replaced and added.

The invention discloses a surface measuring device. The surface measuring device comprises a rotating frame, a first rotating shaft and at least one base, wherein the first rotating shaft is pivotally arranged on the rotating frame and is suitable for being provided with a reflector plate, the bases are pivotally connected with the rotating frame, the pivotal axes of the bases are perpendicular to the pivotal axis of the first rotating shaft, and the bases are suitable for being attracted on the surface of a piece to be measured. According to the surface measuring device, by arranging the rotating frame, the first rotating shaft pivotally connected with the rotating frame and the bases of which the pivotal axes are perpendicular to the pivotal axis of the first rotating shaft, multi-angle measurement is facilitated, and the limitation of position selection of instruments erected for measurement is reduced. Moreover, the angle error can be reduced, the authenticity of measured data is ensured, and the measurement operation efficiency is improved.

The invention provides a tree crown size and surface area measurement technology with an electronic theodolite as a tool. The technology is characterized in that peripheral feature points of a tree crown are measured by the electronic theodolite as a tool, data is stored in a memory card of the electronic theodolite, and a tree crown curve regression model is established by the peripheral feature points of the tree crown so as to measure the tree crown size and surface area. The technology can greatly improve the calculation accuracy of the tree crown size and surface area, and overcomes the defects of low accuracy of an existing simple tree crown size and surface area measurement method, and complicated process of an existing tree crown size and surface area measurement method with high accuracy.

The present invention discloses a small-range dynamic GPS topographic surveying method. Said method includes the following steps: first step, defining relative position of GPS base station and moving station, making distance of two station antennas be less than 29 cm; second step, slowly moving moving station, locking satellite according to traditional dynamic GPS location method,making continuous following observation; and third step, if the satellite is unlocked, again starting the above-mentioned surveying sequence in the known any point. Said method is simple, and can effectively raise surveying efficiency.