Transport Sensor Muting for Transparent Load Detection
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Solution Overview
Problem
Existing transport devices struggle to appropriately mute invasion detection sensors when the transport target is transparent, leading to incorrect detection of the target.
Innovation Solution
A transport device with a muting device that includes a mount sensor and a range detection sensor to determine if a transport target is present, temporarily invalidating the invasion detection sensor when the target is being transported, and validating it when no target is present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an optical mute sensor is used to detect the transport target, then the transport target can be detected by light blocking, but the sensor cannot detect transparent transport targets because light passes through them
Solution Approach 1:
The patent changes the detection parameter from optical (light blocking) to electromagnetic (radio wave reflection). The muting device uses a radio wave-type detection sensor that emits radio waves and detects reflected waves from the transport target, enabling detection of transparent objects that do not block light but do reflect radio waves.
Solution Approach 2:
The patent substitutes the optical detection mechanism with an electromagnetic detection mechanism. Instead of using light projection and reception to detect the transport target, the system uses radio wave emission and reflection detection, replacing the optical field with an electromagnetic field for more versatile detection.
2Reliability
If the invasion detection sensor is muted during transport, then false detection of the transport target is prevented, but the sensor cannot detect actual intrusions or other objects during the muting period
Solution Approach 1:
The muting device is activated in advance when the transport target enters the detection range, before the invasion detection sensor would potentially detect it as an intrusion. This preliminary muting prevents the detection blind period from causing false negatives, as the sensor is already muted when the target approaches.
Solution Approach 2:
The system uses feedback from the detection sensor to control the muting device. When the sensor detects the transport target or an intrusion, it sends a signal to the muting device, which then activates to prevent false detection. The continuous feedback loop ensures the muting state is dynamically adjusted based on actual detection conditions.
3Measurement precision
If the invasion detection sensor operates continuously, then all objects passing through the detection surface are detected, but the transport target is mistakenly detected as an intrusion during transport
Solution Approach 1:
The muting device acts as an intermediary between the detection sensor and the control system. It receives detection signals from the sensor and selectively activates muting based on the transport state, preventing false detection of the transport target while allowing detection of actual intrusions. The intermediary filters out harmful false detections while preserving useful detection capabilities.
Data Source
AI summary
A transport device includes a transport vehicle, a cover member, an invasion detection sensor, and a muting device configured to invalidate the invasion detection sensor. The transport vehicle includes a mounting section and a wagon section configured to support the mounting section and travel. The detection surface is disposed to intersect with the movement trajectory of the transport target. The muting device invalidates the invasion detection sensor in response to an affirmative detection result from a mount sensor and an affirmative detection result from a range detection sensor, and the muting device validates the invasion detection sensor in response to a negative detection result from the mount sensor or a negative detection result from the range detection sensor.