Laser Height Measurement Using Ceiling Reflection
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Solution Overview
Problem
Conventional height measuring apparatuses integrated with scales are bulky, difficult to carry, and require assistance for operation.
Innovation Solution
A height measuring apparatus and method utilizing a laser ranging technique that emits and detects laser beams along specific light paths to calculate the height of an object, allowing for standalone operation and compact design, suitable for environments with a reflecting surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional scale is integrated with a height measuring apparatus, then height measurement function is added, but the device occupies large space and becomes difficult to carry
Solution Approach 1:
The patent replaces the conventional mechanical height measuring structure (which requires physical contact and assistance) with a laser-based optical measurement system. The laser beam emitting module and photo detection module enable non-contact height measurement by calculating the time of flight of laser beams, thereby reducing device size while maintaining measurement functionality.
Solution Approach 2:
The height measuring apparatus enables self-service operation where the user can independently measure their own height without requiring an assistant. The device automatically emits laser beams, detects reflected light, and calculates height through the control module, eliminating the need for manual operation assistance.
2Adaptability or versatility
If a conventional scale is integrated with a height measuring apparatus, then height measurement function is added, but the device becomes difficult to operate independently
Solution Approach 1:
The height measuring apparatus enables self-service operation where the user can independently measure their own height without requiring an assistant. The device automatically emits laser beams, detects reflected light, and calculates height through the control module, eliminating the need for manual operation assistance.
Solution Approach 2:
The patent replaces the conventional mechanical height measuring structure (which requires physical contact and assistance) with a laser-based optical measurement system. The laser beam emitting module and photo detection module enable non-contact height measurement by calculating the time of flight of laser beams, thereby reducing device size while maintaining measurement functionality.
3Measurement precision
If laser beams are emitted along different light paths, then measurement accuracy is improved, but the device complexity increases
Solution Approach 1:
The laser beam emitting module is designed to emit laser beams along multiple light paths (first light path and second light path) using the same hardware component. This multi-functional design allows the device to perform different measurement functions (measuring distance to reflecting surface and distance to object) with a single module, managing complexity while improving measurement accuracy.
Solution Approach 2:
The patent introduces a reflecting surface as an intermediary element to facilitate accurate height measurement. By emitting laser beams to both the reflecting surface and the object, and comparing the reflected light paths, the system achieves precise height calculation without requiring complex direct measurement mechanisms.
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
Enables accurate and independent height measurement without the need for additional assistance, allowing for integration into scales and easy portability.
Implementation Method 1
a first reflecting light resulting from the first laser beam reflected by the first reflecting surface and a second reflecting light resulting from the second laser beam reflected by both of the object under test and the first reflecting surface
Implementation Method 2
The at least one photo detection module is used for selectively generating a first piece of data corresponding to a first reflecting light and a second piece of data corresponding to a second reflecting light by determining whether the first reflecting light resulting from the first laser beam reflected by the first reflecting surface and the second reflecting light resulting from the second laser beam reflected by both of the object under test and the first reflecting surface
Implementation Method 3
calculating a first length according to a first piece of data corresponding to the first reflecting light when the first reflecting light is received, emitting a second laser beam along a second light path, determining whether a second reflecting light resulting from the second laser beam reflected by both of the first reflecting surface and an object under test is received, calculating a second length according to a second piece of data corresponding to the second reflecting light
Data Source
AI summary
A height measuring apparatus and a method thereof are disclosed. The disclosed method is suitable for an indoor environment. The disclosed method comprises emitting a first laser to a ceil via a first light path, determining whether a first reflective light corresponding to the first laser is received, emitting a second laser to an object via a second light path reflected by the ceil, determining whether a second reflective light corresponding to the second laser is received, calculating a first length according to a first data corresponding to the first reflective light, calculating a second length according to a second data corresponding to the second reflective light, and calculating an object height of the object according to the first length and the second length.