Construction Laser Direction Determination Using Rotational Code Patterns
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Solution Overview
Problem
Current methods for determining the direction of a laser receiver in a construction laser system are slow, unreliable, and laborious, leading to inaccuracies and high error susceptibility, especially when dealing with large distances and varying environmental conditions.
Innovation Solution
A rotation angle range-dependent multitrack digital code pattern is used, where a series of rotational passes generates angle range patterns by modifying the laser beam, allowing for the derivation of the receiver's direction through processing incoming signals, eliminating the need for real-time evaluation and reducing dependence on radio data transmission delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If real-time evaluation and radio data transmission are used for determining laser receiver direction, then the system can provide direction information, but the determination becomes slow and unreliable due to transmission delays and external influences
Solution Approach 1:
The system pre-generates a code pattern that is modulated onto the laser beam in advance during rotational passes. This preliminary encoding allows the receiver to decode direction information locally without requiring real-time radio transmission and evaluation, eliminating transmission delays and external interference.
Solution Approach 2:
The patent introduces a code pattern as an intermediary carrier that embeds direction information within the laser beam itself. This code pattern acts as a mediator between the laser source and receiver, enabling direct optical communication without relying on external radio transmission systems.
2Measurement precision
If complex real-time evaluation methods are used for direction determination, then direction information can be obtained, but the process becomes laborious and error-prone
Solution Approach 1:
The laser receiver autonomously decodes the code pattern embedded in the laser beam to determine direction information. This self-service capability eliminates the need for complex external evaluation systems, reducing both device complexity and potential sources of error while maintaining high measurement precision.
3Area of stationary object
If the system operates over large distances and in noisy environments, then coverage area is improved, but direction determination becomes inaccurate and susceptible to errors
Solution Approach 1:
The system uses periodic rotational passes to generate and transmit the code pattern through the laser beam. This periodic encoding creates a time-dependent signal structure that allows the receiver to distinguish the encoded direction information from random environmental noise, maintaining reliability over large distances.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a robust, fast, and reliable method for determining the laser receiver direction, independent of external influences, with consistent accuracy and reduced error, enabling efficient operation over large distances and in noisy environments.
Implementation Method 1
a rotation laser (10), having a laser unit (11) and a rotatable deflection means (12), for emission of a rotating laser beam (14), the rotating laser beam defining a reference surface
Implementation Method 2
a laser receiver (20) having a laser beam detector (21), which extends at least over a one-dimensional region on the laser receiver, so that the laser receiver is formed in order to generate an output signal (24) as a function of incidence of the laser beam (14) on the laser beam detector
Data Source
AI summary
A construction laser system includes a rotation laser and a laser receiver. To determine a direction in which the laser receiver lies in sight of the rotation laser, a digital code respectively assigned uniquely to the respective rotation angle ranges includes a state value sequence based on a defined sequence of states relating to the laser beam. In the respective rotation angle ranges, the corresponding sequence of states is respectively generated by successively occurring crossings of the respective rotation angle range. On the receiver side, an output signal is generated as a function of incidence of the laser beam. With the aid of an output signal sequence of successively generated output signals, which is acquired by the evaluation unit, the state value sequence corresponding to the acquired output signal sequence is identified, permitting final determination of the corresponding rotation angle range in which the laser receiver lies.