Porro prism azimuth reference measuring instrument

A Polo prism and benchmark technology, applied in the field of measurement, can solve problems such as no correlation, and achieve the effects of easy field use, convenient operation and high precision

Active Publication Date: 2011-05-18
TIANJIN NAVIGATION INSTR RES INST
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  • Porro prism azimuth reference measuring instrument

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[0014] The device of the present invention will be further described in detail below in conjunction with the accompanying drawings and through specific examples. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the device of the present invention.

[0015] A Porro prism azimuth reference measuring instrument includes a base 1, a right-angled triangular prism 6, a prism bracket 4, a level bubble 3, and a leveling nut 13, etc., the prism bracket is installed coaxially with the base through a hollow shaft 5 in the middle, and passed through The retaining ring 15 on the back of the base is axially fixed, and the prism support can rotate coaxially on the base through the hollow shaft; the right-angled triangular prism is installed on the finishing surface in the prism support, and the screw (M2 .5×6) fixed installation, the level bubble is installed in the level base 2 on the upper part of the prism support.

[0016] On the base...

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Abstract

The invention relates to a Porro prism azimuth reference measuring instrument. A right-angle prism is mounted on a prism bracket; the prism bracket and a base are coaxially mounted; a level bubble is mounted at the upper part of the prism bracket; the base at one side of the prism bracket is provided with an upper support plate and a lower support plate respectively; a screw is vertically fixed between the two support plates; a leveling nut is meshed on the screw; a mounting block is sleeved on the screw above the leveling nut; and a cylindrical right-hand spring is sleeved on the screw between the mounting block and the upper support plate. The invention belongs to a new azimuth measuring reference device; the Porro prism is mounted on a chassis of navigation equipment and can fully replace the plane mirror on an internal inertial platform of the navigation equipment, wherein the plane mirror is used as azimuth reference of the system and also can check the azimuth output of the system; and meanwhile, the problem that a theodolite must be positioned on the normal of mirror surface and at equal altitude during the leading-in and leading-out of azimuth reference is solved, the field use is facilitated, the operation is convenient, and the precision is high.

Description

technical field [0001] The invention belongs to the technical field of measurement, and relates to an azimuth reference lead-in and lead-in device, in particular to a porro prism azimuth reference measuring instrument which can be used as inertial navigation equipment and engineering field. Background technique [0002] In inertial navigation equipment, a plane mirror is generally installed on the inertial platform as the orientation reference of the equipment. Through this plane mirror, it can be checked whether the electrical zero position of the navigation equipment is consistent with the mechanical zero position, and the orientation output of the navigation equipment is drawn out through the plane mirror. . As the azimuth reference measurement device of navigation equipment, the plane mirror has the advantage of clear imaging, but the erection of the theodolite must be located on the normal line of the plane mirror and be at the same height as it. Therefore, it is diffic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C9/24G01C25/00G01C21/16
Inventor 范凯峰王兴全罗巍孙学成
Owner TIANJIN NAVIGATION INSTR RES INST
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