Photoelectric Sensor Transit Time Display for Response Time Adjustment
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Solution Overview
Problem
Conventional photoelectric sensors lack the provision of comprehensive information necessary for users to effectively set measurement conditions, particularly response time, beyond just comparing light received with a threshold value.
Innovation Solution
A photoelectric sensor with a light emitting unit, a light receiving unit, and a display unit that shows transit time and variation amount when the detection value crosses a threshold, along with a setting device to adjust response time based on these values, and a memory device to store and select appropriate response times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If only threshold comparison is displayed, then the device complexity is low, but the information provided to users is insufficient for setting measurement conditions
Solution Approach 1:
The display information is segmented into distinct components: threshold comparison results, transit time measurements, and variation amount data. Each segment serves a specific purpose in helping users set measurement conditions, allowing comprehensive information provision without overwhelming the user interface.
Solution Approach 2:
The patent introduces intermediate measurement parameters (transit time and variation amount) that mediate between the raw detection data and the final measurement conditions. These intermediate values provide users with actionable insights for setting appropriate thresholds and response times without requiring complex analysis.
2Measurement precision
If transit time and variation amount are displayed, then users can set accurate measurement conditions, but the device complexity increases
Solution Approach 1:
The photoelectric sensor performs self-measurement of transit time and variation amount using its own detection capabilities. The system automatically calculates these parameters from its detection data and displays them for user reference, eliminating the need for external measurement equipment and reducing overall system complexity.
Solution Approach 2:
The patent measures and displays changes in detection parameters (transit time and variation amount) rather than absolute values. This approach provides users with dynamic information about system behavior under different conditions, enabling more accurate measurement condition setting without requiring complex absolute calibration.
3Adaptability or versatility
If multiple response times are stored and selected based on transit time and variation amount, then the adaptability to different detection conditions is improved, but the device complexity increases
Solution Approach 1:
The system dynamically selects response times from multiple stored options based on real-time transit time and variation amount measurements. This dynamic adaptation allows the photoelectric sensor to optimize its performance for different detection conditions without requiring manual reconfiguration, enhancing versatility while keeping the selection mechanism straightforward.
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 users to set accurate measurement conditions by displaying transit time and variation amount, allowing for precise adjustment of response time, thereby improving the detection process.
Implementation Method 1
a light emitting element configured to emit detection light toward a detection area
Implementation Method 2
a light receiving element configured to receive the detection light from the detection area and to obtain a detection value corresponding to the amount of light received
Data Source
AI summary
The disclosure provides a photoelectric sensor that provides useful information to set measurement conditions. The photoelectric sensor includes a light emitting unit having a light emitting element configured to emit detection light toward a detection area, a light receiving unit having a light receiving element configured to receive the detection light from the detection area and to obtain a detection value corresponding to the amount of light received, and a display unit configured to display information about the detection value in the light receiving unit. When the detection value varies across a predetermined threshold, the display unit displays a transit time that is the time from when the detection value crosses the predetermined threshold until when it crosses the predetermined threshold again, and a variation amount of the detection value in the variation.