A method for measuring the amplitude of a crane
A measurement method and crane technology, which is applied in the field of test surveying and mapping, can solve the problems of difficulty in determining the coverage of the slewing center turntable of crawler cranes, affecting inspection results, and low measurement accuracy, so as to reduce artificial reading errors and wind vibration errors, and improve measurement accuracy , Improve the effect of measurement accuracy
Active Publication Date: 2020-10-16
SHANGHAI INST OF SPECIAL EQUIP INSPECTION & TECHN RES
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[0004] However, at the inspection site, the slewing center of crawler cranes is often covered by the turntable and it is difficult to determine. Traditional methods such as measuring with a tape measure have low measurement accuracy. For example, the tape measure will have reading errors caused by traction and gravity deformation, and its measurement error even exceeds that of cranes. The comprehensive error of the amplitude display system seriously affects the judgment of the test result
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[0027] As mentioned above, the center of rotation of the crane is often covered by the turntable and it is difficult to determine. At the same time, the measurement error range is large when using a tape measure, and the range display value error is too large when the boom angle is small when the sensor is used to measure. The present invention is different from these methods, and indirectly measures the amplitude value of the crane by means of coordinate space analytic geometric transformation.
[0028] The method for measuring the amplitude of a crane according to the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrati...
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The invention provides a crane amplitude measuring method. The crane amplitude measuring method comprises the steps of: adopting a location point to establishing a space coordinate, performing space coordinate conversion on a measuring point so as to calculate the crane amplitude. The method has the advantages of accurate measurement and concise calculation, and the distance from the rotation center of the crane to the center of the lifting hook is not required to be directly measured, so that the measurement error is reduced.
Description
technical field [0001] The invention relates to the technical field of testing and mapping, in particular to a method for measuring the amplitude of a crane. Background technique [0002] The crane range refers to the horizontal distance from the center axis of the crane's slewing center to the center of the hook. According to relevant national regulations, crawler cranes over 200t need to be installed with a large-scale monitoring system, and it is required to verify that the comprehensive error of its amplitude is not greater than 5% in statutory inspections. Therefore, it is very important to measure its amplitude on site and check its comprehensive error. [0003] The amplitude display system of crawler cranes usually uses an angle sensor to measure the angle of the boom, and at the same time records the length of the boom at this time, and converts it into the lifting amplitude by multiplying the arm length by the cosine of the angle of the boom. Since the accuracy of ...
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IPC IPC(8): G01B21/04
CPCG01B21/04
Inventor 许海翔陈庆诚吴峰崎薛季爱
Owner SHANGHAI INST OF SPECIAL EQUIP INSPECTION & TECHN RES