Drive Device Threshold Switching for Detection Reliability
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Solution Overview
Problem
Conventional drive devices and spray devices that control operations based on detector signals suffer from unreliable performance due to either unnecessary driving cancellation or failure to detect moving bodies, as they lack effective threshold settings for signal capture.
Innovation Solution
A drive device with a controller that switches between high and low thresholds for detecting moving bodies, allowing for precise control of drive processing and cancellation, ensuring necessary driving is performed without failure and unnecessary cancellations are minimized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If detection signals are widely captured, then detection coverage is improved, but unnecessary driving cancellation increases
Solution Approach 1:
The patent applies parameter changes by dynamically switching between high and low thresholds based on timing relative to drive processing. Before drive processing, a low threshold is used to ensure comprehensive detection coverage. After drive processing, a high threshold is used to reduce false detections. This temporal parameter adjustment resolves the contradiction by adapting detection sensitivity to operational context.
Solution Approach 2:
The detection threshold is made dynamic rather than static. The system automatically adjusts the threshold parameter based on whether drive processing is currently executing, transforming the detection system from a fixed-state to an adaptive-state mechanism that optimizes both coverage and false detection reduction.
2Productivity
If detection signals are restrictively captured, then false detection is reduced, but necessary driving cancellation fails
Solution Approach 1:
The patent uses parameter changes to switch between restrictive and permissive detection modes. During drive processing, a high threshold restrictively captures signals to reduce false detections. Before drive processing, a low threshold permissively captures signals to ensure necessary cancellations are detected. This resolves the contradiction by applying appropriate detection strictness at appropriate times.
3Productivity
If a single high threshold is used, then false detection is reduced, but detection sensitivity decreases
Solution Approach 1:
The threshold parameter is made dynamic, switching between high and low values based on operational phase. This resolves the contradiction by allowing the system to have high detection sensitivity (low threshold) when needed before driving, and high false detection resistance (high threshold) when driving is active, rather than being constrained to a single static threshold value.
4Measurement precision
If a single low threshold is used, then detection sensitivity is improved, but false detection increases
Solution Approach 1:
The patent applies parameter changes by switching the threshold value based on timing. A low threshold is used before drive processing to maintain high detection sensitivity, then switched to a high threshold after drive processing begins to reduce false detections. This temporal parameter adjustment resolves the contradiction between sensitivity and false detection rate.
Data Source
AI summary
A drive device in which a controller includes a detection determiner, a high threshold that is initially set and a low threshold are switchably set in the detection determiner as thresholds for determining whether or not to capture detection signals, the controller performs: when the detection determiner makes a capture determination before drive processing, low-switching processing to switch the threshold from the high threshold to the low threshold before the drive processing is started based on the determination results; and perform drive cancellation processing to cancel driving of a driver when the detection determiner makes a capture determination after the low-switching processing.