CN2164020Y

CN2164020Y - Eccentric measuring board

Info

Publication number: CN2164020Y
Application number: CN 93228928
Authority: CN
Inventors: 徐卫东; 邵惠民
Original assignee: BENXI HIGHER TRAINING SCHOOL OF METALLURGY
Current assignee: BENXI HIGHER TRAINING SCHOOL OF METALLURGY
Priority date: 1993-07-31
Filing date: 1993-07-31
Publication date: 1994-05-04
Anticipated expiration: 2003-07-31

Abstract

The utility model relates to an eccentric measuring board which can be used for indicating the distance between a prism and a measuring point in measuring engineering. The structure of the utility model is characterized in that the eccentric measuring board is a rectangular equilateral L-shaped board, a circular hole (3) is arranged at the center position of the connecting line of two right angles (1) and (2), and the circular hole (3) is a prism bar hole. The distance of the center of the circular hole (3) between the right angle (1) is equal to that of the right angle (2), and the distance is called as an eccentric distance delta. When the measuring point is a convex or concave rectangular wall corner, the eccentric measuring board can be used for measuring the eccentric distance delta between the prism and the wall corner directly, which is beneficial to enhance the speed and the accuracy of measuring process.

Description

Eccentric measuring board

The utility model relates to the dip stick in the field of measuring technique, particularly a kind of dip stick that directly provides prism and measuring point distance.

The existing work of extensively carrying out such as ground mat measurement, topographical surveying and precise engineering survey are all used total powerstation or half total powerstation (stadimeter adds optical theodolite) and are carried out.This need found prism (claiming reflective mirror again) on the position, measured point.But for the measurement of perpendicular type buildings, particularly when measuring point is the perpendicular type corner of protruding, matrix, because the metope obstacle, can't when upright mirror, make the prism center just in time be positioned on the position, measured point, form an eccentric distance δ.In the time can not accurately providing this eccentric distance δ, can influence the measuring accuracy of whole measuring process.

When measuring point is the perpendicular type corner of protruding, matrix,, take following method usually for reducing owing to can not accurately measure the measuring error that eccentric distance δ is caused:

1, the prism chi may be close to thirty years of age in corner.With the eccentric distance δ between ruler estimation prism and corner.This method is loaded down with trivial details, and measuring error is big, can not satisfy the needs of the measurement engineering that measuring accuracy is had relatively high expectations.

2, the prism chi may be close to thirty years of age in corner.During measurement, use revised prism constant, the back that is about to prism is considered as the center of prism.But this method is that the square corner of convex is effective to measuring point only, and when measuring point was the perpendicular type corner of matrix, the back of prism can not be close on the corner, still need estimate eccentric distance δ.

The purpose of this utility model is to study a kind of misalignment measurement plate, and this plate can accurately show the eccentric distance δ between prism and measuring point when measuring point is the corner of protruding, matrix, improves the speed of measuring process, reduces the error of measuring, and simplifies calculation procedure.

Accompanying drawing is the planimetric map of misalignment measurement plate.It is a kind of equilateral right angle L template, and (1) has a circular hole (3) with the center of right angle (2) line at the right angle.Circular hole (3) is the prism bar hole, and the center of circular hole (3) equates that with the distance of right angle (1) and right angle (2) be called eccentric distance δ, eccentric distance δ can directly measure, and also can obtain as calculated according to processing dimension.

As get the plank of 14 millimeters thick, and the diameter of circular hole (3) is 12 millimeters, and two length of sides of right angle (1) respectively are 200 millimeters, and two length of sides of right angle (2) respectively are 100 millimeters, and then eccentric distance δ is:

During measurement, by the prism bar hole of circular hole (3), respectively two blocks of misalignment measurement plates are installed in the top of measuring staff head and the bottom of prism, right angle (1) heads on when measuring point is the perpendicular type corner of matrix, and right angle (2) head on when measuring point is the perpendicular type corner of convex.

Utilize the misalignment measurement plate to measure when the perpendicular type corner of measuring point for convex and matrix, because eccentric distance δ is known, thereby can determine the coordinate of measuring point easily, improve the precision of measuring, can be widely used in the ground mat and measure, in topographical surveying and the precise engineering survey.

Claims

1, a kind of misalignment measurement plate is characterized in that this plate is the equilateral L template in a right angle, has a circular hole (3) on the plate.

2,, it is characterized in that circular hole (3) is centered close to the center of right angle (1) and right angle (2) line according to the described misalignment measurement plate of claim 1.