Handheld length measuring instrument
A length measurement, hand-held technology, applied in the field of surveying and mapping, can solve the problems of inconvenient portability, complicated operation of the surveying and mapping process, time-consuming and laborious size data, etc., to achieve the effect of easy portability, reduce design and production cycle, and improve surveying and mapping speed
Inactive Publication Date: 2014-10-01
SOUTHEAST UNIV
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Problems solved by technology
[0002] In actual engineering surveying and mapping, drafters need to use surveying tools to complete the measurement of the length of a straight line, and the length measurement of irregular curves, such as fork-shaped protrusions, four-axis linkage and curved rail braces and other mechanical parts. General surveying and mapping tools It is difficult to complete, and often requires the use of large-scale surveying and mapping instruments, which are extremely inconvenient to carry, and the surveying and mapping process is complicated to operate, especially in field work and actual engineering surveying and mapping, obtaining dimensional data becomes more time-consuming and laborious
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specific Embodiment approach
[0036] Combined with the internal structure diagram figure 1 Schematic diagram of integration image 3 , the specific embodiment of the present invention is as follows:
[0037] The belt drive is driven by a single belt, and the small belt pulley 2 and the small rotating shaft 1 are installed through a keyway, and the belt pulley 5 and the large rotating shaft 4 are installed through a keyway, and the belt 3 is installed between the small pulley 2 and the pulley 5. The small rotating shaft 1 and the large rotating shaft 4 are installed on corresponding notches inside the left housing 11 and the right housing 12, and are designed to be reinforced and thickened on the installation notches. The pulley 2 is a conventional pulley structure.
[0038] figure 2It is a cross-sectional view of a slot-type photoelectric sensor, a toothed masking disc and a belt pulley. The tooth-shape masking disc 5-1 and the belt pulley 5 are integrally processed by the same common grooved gear. Ta...
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A handheld length measuring instrument comprises a shell, a small belt pulley, a large belt pulley, a groove type photoelectric sensor, a programmable counter and a display element are arranged in the shell, the small belt pulley and the large belt pulley are doubled as measuring rolling wheels, and are connected with the shell in a rotation mode through a small rotating shaft and a large rotating shaft respectively, the small belt pulley protrudes out of the shell, the small belt pulley and the large belt pulley are in transmission through a belt, a light source emitter is arranged on one arm of the groove type photoelectric sensor, a light source receiver for receiving emission light sent by the light source emitter is arranged on the other arm of the groove type photoelectric sensor, a tooth-shaped shading disc is arranged on the large rotating shaft, the tooth-shaped shading disc and the large belt pulley synchronously rotate, the tooth-shaped shading disc enters a groove opening of the groove type photoelectric sensor, and teeth on the tooth-shaped shading disc effectively shield the emission light sent by the light source emitter. The programmable counter is used for processing output signals of the groove type photoelectric sensor, and the length of a measured object is formed and is displayed on the display element.
Description
technical field [0001] The invention relates to a hand-held length measuring instrument, which can quickly measure the length of any straight line and irregular line, and can display the measured value in real time, belonging to the technical field of surveying and mapping. Background technique [0002] In actual engineering surveying and mapping, drafters need to use surveying tools to complete the measurement of the length of a straight line, and the length measurement of irregular curves, such as fork-shaped protrusions, four-axis linkage and curved rail braces and other mechanical parts. General surveying and mapping tools It is difficult to complete, and often requires the use of large surveying and mapping instruments, which are extremely inconvenient to carry, and the surveying and mapping process is complicated. Especially in field operations and actual engineering surveying and mapping, obtaining dimensional data becomes more time-consuming and laborious. Contents ...
Claims
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IPC IPC(8): G01B21/02
Inventor 薛澄岐牛亚峰陈晓皎沈张帆陈月婷
Owner SOUTHEAST UNIV
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