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    • 12. 发明专利
    • POSITIONING APPARATUS USING LASER BEAM
    • JPH0712565A
    • 1995-01-17
    • JP18222393
    • 1993-06-29
    • MITSUBISHI PRECISION CO LTD
    • TAKAGI HIROSHI
    • G01C15/00
    • PURPOSE:To enhance the surveying accuracy of a positioning operation by a method wherein a laser-beam radiation tube is turned around its optical axis, a laser beam is received by a sensor which has been divided into a plurality of regions, quantities of light of the individual divided regions are detected and the mean in terms of time of the quantities of light of the individual divided regions in its rotation is computed. CONSTITUTION:A laser-beam radiation tube 10 radiates a laser beam 14 to a prescribed direction together with an object to be positioned, and the object is positioned so as to be irradiated with the beam 14. In order to detect an irradiation central position and position it precisely, the converter 16 is divided into four regions Z1 to z4 so as to be divided by orthogonal X-and Y-axes, and quantities of light of the individual regions are detected and converted into electric signals. The individual signals are input to a comparison and output device 18 via signal lines L1 to L4, the means in terns of time of the individual signals is computed, their magnitude is compared, and a composed value is output to a display device 20. An operator turns the radiation tube 10 around an optical axis 14C by a motor 12, and he moves the object while observing the device 20 in such a way that the reference point of the converter 16 coincides with the optical axis 14C. Thereby, the object can be positioned precisely in a short time.
    • 13. 发明专利
    • BEND MEASURING METHOD OF HOLE
    • JPH0712562A
    • 1995-01-17
    • JP18222293
    • 1993-06-29
    • MITSUBISHI PRECISION CO LTD
    • TAKAGI HIROSHI
    • G01B21/20G01C9/00G01C19/00
    • PURPOSE:To obtain a measuring method in which the bend state of a vertical or nearly vertical hole is measured with high accuracy, continuously and in a short time. CONSTITUTION:The measuring method is a method in which the bend of a hole 12 in the vertical direction or the nearly vertical direction is measured by a probe 18 on which an accelerometer 20 and a gyro 22 have been mounted. Individual inclinations theta at the entrance 12I and the end 12E of the hole 12 are measured by the accelerometer 20, and an inclination between them is measured continuously by the gyro 22. The measuring method is constituted in such a way that the difference between the inclination value of the end 12E on the basis of the continuously measured value and the inclination value, of the end 12E of the hole 12, which has been measured by the accelerometer 20 is regarded as the drift of the gyro 22 having a definite drift rate within the continuous measuring time and that the continuously measured value is corrected.
    • 17. 发明专利
    • INERTIA NAVIGATION DEVICE
    • JPH05133762A
    • 1993-05-28
    • JP32144891
    • 1991-11-11
    • MITSUBISHI PRECISION CO LTD
    • TAKAGI HIROSHI
    • G01C21/16
    • PURPOSE:To construct a sensor part of an intertia navigation device small and light by furnishing in with two composite sensors of inertia type which measure the accelerations along two axes and the angular velocity round these axes simultaneously, and arranging them at any arbitrary angles out of parallel. CONSTITUTION:In a sensor part 1, two composite sensors 61, 62 are arranged intersecting orthogonally, wherein the sensor 61 senses the acceleration and angular velocity in the Z- and Y-direction while the sensor 62 senses those in the X- and Z-direction about the X-Y-Z coordinates system which is fixed to a moving body. The acceleration outputs alphaX, alphaY and angular velocity outputs omegaX, omegaY of the sensor 61 and the acceleration output alphaZ and angular velocity output omegaZ of the sensor 62 are subjected to scale factor correction and bias correction made by sensor electronics 4 and passed to a computer 5. The computer 5 performs conversion from the coordinates system fixed to the moving body into the navigation coordinates system and calculates the position in the navigation coordinates system, attitude angle, and velocity. This permits lessening of provision of sensors from four as conventional to two, which allows constructing the device small and light.