Surveying Instrument Reference Leg Positioning

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Solution Overview

Problem

The installation of surveying instruments is complex and time-consuming, requiring accurate positioning on a vertical line and leveling, which demands skill and time.

Innovation Solution

A surveying instrument with a tripod and laterally rotatable main body, featuring a reference leg with a known relationship to the machine center, auxiliary legs, a distance measuring module, lateral rotation angle detector, and an arithmetic control module that calculates the machine reference point's position relative to the reference point, allowing for easy alignment and installation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional installation method using tripod with leveling device is used, then positioning accuracy is improved, but installation complexity and time increase

Engineering Contradiction:
Improvepositioning accuracyVSAvoidinstallation complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent extracts and eliminates the leveling device from the installation system. By removing this complex component and its associated adjustment procedures, the installation process is simplified while maintaining positioning accuracy through the reference leg's known geometric relationship with the machine center.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical leveling system with a computational approach. The arithmetic control module calculates the machine reference point position based on the reference leg's known geometric relationship, substituting mechanical leveling operations with mathematical computation to achieve the same positioning accuracy.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If conventional installation method with leveling is used, then positioning accuracy is improved, but installation time increases

Engineering Contradiction:
Improvepositioning accuracyVSAvoidinstallation time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The reference leg's geometric relationship with the machine center is predetermined and stored in advance. This preliminary preparation of geometric data eliminates the need for time-consuming leveling operations during installation, as the system only requires positioning the reference leg and then computationally determines the machine reference point.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent replaces time-consuming mechanical leveling operations with rapid computational calculation. The arithmetic control module quickly computes the machine reference point position based on the reference leg's known geometry, dramatically reducing installation time while maintaining the required positioning accuracy.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If conventional installation method is used, then positioning accuracy is improved, but skill requirement increases

Engineering Contradiction:
Improvepositioning accuracyVSAvoidinstallation ease
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

The patent removes the leveling device and its associated complex adjustment procedures from the installation process. This extraction eliminates the need for skilled operators to perform leveling operations, making the installation process simpler and more accessible to users with minimal training.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The system performs self-positioning through the arithmetic control module, which automatically calculates the machine reference point position based on the reference leg's known geometric relationship. This self-service capability eliminates the need for skilled manual positioning and leveling operations, making the installation process easier and more automated.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS11385052B2Surveying instrument
Publication Date: 2022.07.12 TOPCON CORPORATION
  • US11385052B2 patent drawing
  • US11385052B2 patent drawing
  • US11385052B2 patent drawing

AI summary

There is provided a surveying instrument including a tripod which is installed on an installation surface and a surveying instrument main body which is provided on the tripod and laterally rotatable around a longitudinal axis, wherein the tripod includes a reference leg has a known relationship between a lower end of the reference leg and a machine reference point which is a machine center of the surveying instrument main body, and two auxiliary legs, the reference leg is installed in such a manner that a lower end of the reference leg coincides with a reference point, wherein the surveying instrument main body calculates a position of the machine reference point with respect to the reference point based on the positional relationship between the lower end of the reference leg and the machine reference point.