Active Object Detection Sensor Beam Level Indication
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Solution Overview
Problem
Existing active object detection sensors lack the ability to indicate detection levels of the beam reflected by objects, making it difficult for installation workers to adjust the detection area optimally and identify the correct position of the guide mark for automatic doors.
Innovation Solution
An active object detection sensor that provides indication of detection levels within the detection area, allowing workers to adjust the area by observing the level distribution and using an information providing unit to recognize optimal positions for the guide mark, with a detection level range determination unit and indication unit to facilitate this process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detection area is adjusted by monitoring binary detection results (detected/not detected), then the boundary of the detection area can be identified, but the adjustment process is time-consuming and imprecise
Solution Approach 1:
The patent implements a feedback mechanism by providing real-time indication of detection levels (not just binary detected/not detected) during the adjustment process. The detection level indication unit displays the actual beam reception intensity, allowing the installer to precisely identify the detection area boundary by observing where the detection level transitions from above to below the threshold, significantly improving both precision and speed of adjustment.
Solution Approach 2:
The patent introduces an intermediary element - the detection level indication unit - that mediates between the binary detection state and the installer's perception. This intermediary provides continuous analog feedback about the detection level, enabling the installer to make more precise adjustments without repeatedly testing binary states, thereby reducing adjustment time while improving precision.
2Ease of operation
If the detection area is made visible through object placement, then the boundary can be recognized, but the process requires multiple objects and complex procedures
Solution Approach 1:
The patent extracts the essential information needed for adjustment (detection level) from the complex binary detection process and presents it in a simplified continuous form. By taking out the detection level value and displaying it continuously, the system eliminates the need for multiple objects and complex placement procedures, allowing adjustment with a single object through simple movement while providing rich feedback.
Solution Approach 2:
The patent changes the parameter being monitored from a binary state (detected/not detected) to a continuous parameter (detection level). This parameter change allows the installer to observe the gradual transition of detection intensity as an object moves through the detection area, making the adjustment process more intuitive and easier to perform while reducing procedural complexity.
3Measurement precision
If the guide mark position is not precisely identified, then the automatic door operation may be inaccurate, but precise identification requires complex adjustment procedures
Solution Approach 1:
The patent uses feedback by continuously displaying the detection level as the guide mark or object moves. This allows the installer to precisely identify the optimal guide mark position by observing the detection level pattern (maximum value or specific threshold crossing), achieving high precision without complex procedures since the feedback is provided in real-time through the indication unit.
Solution Approach 2:
The patent replaces complex mechanical adjustment procedures with an optical/electronic feedback system. Instead of relying on physical trial-and-error with multiple objects, the system uses the detection level indication unit to provide electronic feedback about the detection state, allowing precise guide mark positioning through simple observation and minimal physical adjustment.
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 easy adjustment of the detection area and identification of the optimal guide mark position, ensuring accurate detection and operation of automatic doors by providing clear feedback on detection levels through visual or auditory means.
Implementation Method 1
projects a detection beam such as an infrared beam from a projector onto a detection area, causes a receiver to receive the beam reflected by the object
Data Source
Figure 1A~1B
Figure 2(a)~2(c)
Figure 3
AI summary
An active object detection sensor is provided which allows an installation worker to easily adjust a detection area, and further identify an optimum position of a guide mark in a touch detection area. The active object detection sensor used for opening/closing of automatic an opening/closing unit (3) includes: an object determination unit (52) that during an operation mode determines that an object is in a detection area (A) when a detection level of a detection beam received by a receiver (22) exceeds an operation threshold to output an object detection signal; and a detection level indication unit (43) that during an adjustment mode indicates the detection level of the detection beam received by the receiver (22).