Ranging Sensor Self-Calibration Using Reference Object
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Solution Overview
Problem
Aged deterioration in ranging sensors can lead to decreased accuracy, and users cannot determine the reliability of the sensor's performance in various usage environments, making it difficult to ensure accurate data collection.
Innovation Solution
A ranging sensor system that includes a light emitting unit, a light receiving unit, and a calculation unit, which compares detection light reception data with predetermined data obtained from a reference object to assess measurement deviations and control user notifications, allowing for the detection and correction of measurement errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the ranging sensor is used in various usage environments, then the sensor can perform distance measurement functions, but aged deterioration occurs and measurement accuracy decreases
Solution Approach 1:
The patent performs preliminary action by measuring the sensor's response to a reference object with known distance before actual measurement. The calculation unit compares the measured light reception data with predetermined data obtained under controlled conditions, allowing detection of aged deterioration and environmental effects before they affect measurement accuracy.
Solution Approach 2:
The patent implements feedback by continuously monitoring the sensor's response to the reference object and comparing it with stored predetermined data. When deviations are detected, the system provides feedback to the user through notification processing, enabling real-time assessment of sensor reliability and accuracy degradation.
2Productivity
If the ranging sensor operates continuously, then distance measurement can be performed, but users cannot know the state of aged deterioration during measurement
Solution Approach 1:
The system performs preliminary characterization of the sensor's response to the reference object and stores this information as predetermined data. During continuous operation, the calculation unit compares real-time measurements against this baseline, enabling continuous monitoring of sensor health without interrupting measurement operations.
Solution Approach 2:
The notification processing unit provides continuous feedback to users about sensor reliability by comparing current measurements with predetermined data. This feedback mechanism allows users to understand the state of aged deterioration in real-time while the sensor continues to operate, maintaining both productivity and information transparency.
3Reliability
If the light receiving unit receives light from the reference object, then measurement deviations can be detected, but additional components and processing are required
Solution Approach 1:
The light receiving unit serves multiple functions: it receives light from both the reference object for reliability assessment and from actual targets for distance measurement. The calculation unit also performs multiple functions by comparing light reception data with predetermined data to detect deviations, eliminating the need for separate dedicated components.
Solution Approach 2:
The patent uses a reference object with known distance as a copy or replica to assess sensor performance. By measuring the reference object's light reflection characteristics and comparing them with predetermined data, the system creates a benchmark copy that enables reliability assessment without requiring complex additional measurement systems.
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 system enables users to accurately assess and correct measurement deviations, ensuring reliable distance calculations and improved user comfort by providing notification and correction mechanisms for measurement errors.
Implementation Method 1
a light emitting unit that applies light to a target; a light receiving unit that receives light from the light emitting unit reflected from the target
Data Source
AI summary
Provided is a ranging sensor (2), including: a light emitting unit (110) that applies light to a target; a light receiving unit (120) that receives light from the light emitting unit (110) reflected from the target; and a calculation unit (150) that calculates a distance from the light receiving unit (120) to the target based on light reception data acquired by the light receiving unit (120). The calculation unit (150) compares detection light reception data with predetermined data, the detection light reception data being obtained as light is emitted from the light emitting unit (110) to a reference object provided at a predetermined distance and the light of the light emitting unit (110) reflected by the reference object is received by the light receiving unit (120), and controls notification processing to a user.