Sensor Threshold Adjustment via Button Duration
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Solution Overview
Problem
Existing sensors require a time-consuming teach-in process to set switching thresholds, which is inefficient and labor-intensive for parameter adjustments.
Innovation Solution
A sensor design with a button that allows switching threshold adjustments through different time windows, enabling easy and quick parameter setting without a learning process, where the duration of button activation determines the direction and amount of threshold change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a teach-in process is used to set the switching threshold, then the sensor can be configured to detect objects in a specific area, but the process is time-consuming and labor-intensive
Solution Approach 1:
The sensor automatically determines the switching threshold by performing measurements in the detection area and calculating the threshold based on the distribution of measured values, eliminating the need for manual teach-in processes. The sensor serves itself by autonomously configuring its detection parameters through automated measurement and statistical analysis.
2Adaptability or versatility
If multiple buttons or switches are provided for parameter setting, then different functions can be controlled, but the device complexity increases
Solution Approach 1:
A single button is designed to perform multiple functions by detecting the duration of its actuation. Short presses trigger one function while long presses trigger another, allowing the sensor to switch between different operating modes and parameter settings without requiring multiple separate controls. This multi-functional button reduces device complexity while maintaining versatility.
Solution Approach 2:
The function of the button changes dynamically based on the duration of its actuation. The evaluation unit measures how long the button is held down and switches between different functions accordingly. This dynamic response allows a single static component (the button) to control multiple parameters and functions without physical reconfiguration.
3Adaptability or versatility
If the switching threshold is changed frequently, then the sensor can adapt to different detection requirements, but repeated teach-in processes are required
Solution Approach 1:
The sensor can rapidly reconfigure its switching threshold by autonomously performing new measurements and recalculating the threshold based on updated detection requirements. This self-service capability allows frequent adaptation to different detection scenarios without manual intervention or time-consuming teach-in processes, thereby maintaining high operational efficiency.
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 rapid and low-effort adjustment of switching thresholds using a single button, reducing operational complexity and time, while allowing reversible changes and additional parameter settings like light/dark switching.
Implementation Method 1
the transmitted light beams emitted by the transmitter are guided onto the object. The transmitted light beams reflected thereon reach the receiver as received light beams
Implementation Method 2
As a sensor element, this light scanner has a transmitter that emits transmitted light beams and a receiver that receives received light beams
Data Source
Figure 1~2
AI summary
The sensor e.g. optical sensor (1), has a sensor element, and an evaluation unit (6) for evaluating an output signal of the sensor element for generation of an object detection signal with a switching threshold. A key (9) is provided as an adjusting unit, where the switching threshold is changed to large or small value by different operation of the key and duration of operation of the key. Two time frames are specified in the evaluation unit, where the switching threshold is changed to large or small value within the time frames.