ugg milano Theodolite telescope focus changes in t

Theodolite telescope focus changes in the visual axis when the error calibration method

: China Metrology Publishing House, 1990E2] JJG650-1990 belt scale pilot verification. Theodolite telescope focus changes in the visual axis when the error calibration method related domestic industries with high LI (Oilfield Geophysical metering station at the Instrument Center, Hubei Qianjiang 433100) Abstract In this paper, the national metrological verification JJG414-94 and JJGlO0-94, based on theodolite telescope focusing on changes in the visual axis when the error of test methods are discussed and presented the data processing method. Keywords theodolite telescope collimation test methods focusing one, I cut off the feet theodolite is to measure the horizontal angle and vertical angle measuring instruments, test procedures in the optical theodolite and total station JJG4.4-94 electronic speed measuring instrument verification procedures JJG100-94 When the focus of the telescope changes as the shaft 48 * error test methods and requirements to make the rules and instructions. But the two have different requirements for verification procedures and test methods, especially the testing equipment requires a different target distances. To simultaneously detect optical theodolite and total station electronic speed measuring device,[link widoczny dla zalogowanych], need to purchase two different instruments to detect target alignment testing equipment to do so is bound to increase the test cost. To this end, we use the outdoor test method to detect on the salt pad: ratio, the detection accuracy in the required range,[link widoczny dla zalogowanych], the distance between observation points to solve the problem. Second, the telescope structure and the error source is the theodolite sighting telescope equipment, it is by the objective lens, focusing lens, reticle reticle, eyepiece form. Cross wire center and the lens optical center of the connection form the telescope sighting line, commonly known as collimation. See Figure 1. Collimation lens focusing lens crosshairs reticle withered in Figure 1 the telescope focus by moving the focusing lens, the focusing lens and the lens center to change the distance e to achieve. If the objective lens optical center, focusing lens optical center and the cross wire center is located in a straight line, then this line is the telescope's collimation; However, due to processing errors, in fact, they are not in a line,[link widoczny dla zalogowanych], but there is a collinear deviation. If an instrument's focal length lens before the group 1 factory 150mm, combination of focal length /. . Is 250mm, if the focusing lens due to processing, assembling a total error of the center line position deviation 0.01mm, lead to changes in the angle of collimation of 6.6. Therefore, the total of the telescope line of optical components required is very high. Focusing lens should be good to run the rail line and a small change in the gap, and the coaxial optical components should be maintained, otherwise it will cause measurement errors. Third, the detection state verification procedures JJG414-94, JJG100-94 provides the visual axis when the telescope changes focus error of the test emphasis on the horizontal direction, so our detection method is also emphasis on the horizontal direction. Detection equipment will be placed in the corner, press on the test procedure requirement away from the instrument 3m, 9m, 18m, 50m and infinity (greater than 100m) at erecting a sign with carved, and equipment to high,[link widoczny dla zalogowanych], and as a straight line. Figure 2. Figure 2 is awarded the Department of mirror rotating apparatus, adjust the telescope sighting target infinity readings, followed by the far point to near point-by-target, and reading (read cell value or second value) to the test; further away from the nearest point to the followed by observation point reading test for the return. All readings taken from the average measured az. Inverted mirror telescope position to repeat the test procedure,[link widoczny dla zalogowanych], the average reading b, changes in the visual axis deviation of each point obtained the following formula: W: (port-b) × ? i / '2 where t is Reticle cell value. Changes in focus when the visual axis error is calculated as W. . An absolute maximum of whichever test results. Fourth, an example of optical theodolite with a J2 test procedures according to the requirements of the first test, then testing the methods described in the previous section, two sets of data measured and calculated results in Table 1. Table 1, run the telescope focus error detection method error comparison of indoor and outdoor units: S error of observation points outside the indoor Wi wi change are two ways to change the distance error (m) the difference between the W. Within W within a Wi Wol, W a W36.03.57.51.52.095.753.757.02.01.75188.51.08.50.50.5508.251.258.250.750.59 .50.09.00.00.5 max9.53.759.02.02.0 V. Conclusion outdoor detection error within the allowable range, to meet the test requirements. Outdoor detection method to solve the problem of the distance of each observation point, reduce the test cost, but their work than indoor testing large, vulnerable to weather. References [1] Hao Tang Services, Chan King points. Geodetic Instrument. Surveying and Mapping Press. 1994

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