Smart Height Measuring Device Laser Error Correction
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Solution Overview
Problem
Existing height measurement devices, particularly those using ultrasonic technology, suffer from inaccuracies and reliability issues due to errors in measurement caused by tilting of the laser beam and interference from surrounding structures.
Innovation Solution
A smart height measuring device equipped with a laser distance measurement technology, featuring a button for user input on the device's bottom face, allowing users to measure their height independently by pressing the button and irradiating a laser beam to the ceiling, while correcting for errors caused by tilted irradiation directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ultrasonic sensor is used for height measurement, then device portability is improved, but measurement accuracy deteriorates due to cm-level errors and sensitivity to surrounding structures
Solution Approach 1:
The patent replaces the ultrasonic sensor (acoustic field) with a laser sensor (optical field) for distance measurement. The laser sensor measures distance by calculating the time of flight of laser light, achieving millimeter-level precision that is not affected by surrounding structures or environmental conditions, thereby resolving the accuracy issue while maintaining portability
Solution Approach 2:
The patent changes the measurement parameter from acoustic wave-based distance measurement (ultrasonic) to optical wave-based distance measurement (laser). This parameter change fundamentally improves measurement precision from cm-level to mm-level accuracy while eliminating sensitivity to surrounding structures
2Ease of operation
If user measures height by pressing button on device, then ease of operation is improved, but measurement reliability deteriorates due to tilted laser irradiation direction
Solution Approach 1:
The patent introduces a feedback mechanism where the controller receives user input via the button, calculates the expected distance based on the known distance between the button and the laser sensor, and compares it with the actual measured distance. This feedback loop enables the system to detect and correct for tilted irradiation directions, maintaining measurement reliability while preserving ease of operation
Solution Approach 2:
The patent performs preliminary action by pre-calculating the distance between the button and the laser sensor during device manufacturing. This predetermined distance value is stored in the controller and used during measurement to compensate for potential tilting, ensuring accurate measurements without requiring complex real-time calibration
3Measurement precision
If laser beam irradiation is used for distance measurement, then measurement accuracy is improved, but device complexity increases due to error correction calculations
Solution Approach 1:
The patent implements self-service by having the controller automatically perform error correction calculations using pre-stored geometric parameters (distance between button and laser sensor, angles of irradiation). The system self-compensates for measurement errors without requiring external intervention or complex manual calibration procedures, thus improving accuracy while keeping the added complexity manageable through automation
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 device provides accurate and reliable height measurements, allowing users to self-measure their height without assistance, and corrects for measurement errors, enhancing the reliability of the measured data.
Implementation Method 1
distance measuring means for measuring a vertical distance between the object and a structure existing in a region upwardly of the object
Implementation Method 2
a laser sensor, which generates an error in mm
Data Source
AI summary
A device for measuring a height includes an inclined portion including a display, a bottom portion connected to the inclined portion, a support vertically connected to the bottom portion, and a laser device disposed in a region where the inclined portion and the support meet each other, the inclined portion, the bottom portion, and the support are connected to each other based on a shape of a right triangle when viewed from a side, the bottom portion includes a support plate for covering the bottom portion, and a switch is included between the bottom portion and the support plate.