Construction Equipment Rear Side Sensing with Dynamic Alarm Logic
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Solution Overview
Problem
Construction machines, such as excavators, face challenges in sensing rear and side areas due to their rotating functionality, leading to difficulties in observing blind spots and preventing accidents, as existing ultrasonic rear sensing devices do not account for side area detection and often issue unnecessary alarms when detecting fixed objects.
Innovation Solution
A sensing device and method that set a rotation safe-distance area and pattern fixed objects within it, using sensors and cameras to differentiate between fixed and moving objects, and issue alerts only when moving objects are detected within the safe-distance, thereby preventing accidents and reducing operator distraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultrasonic sensors are used to detect objects in rear and side areas, then safety is improved, but unnecessary alarms occur when fixed objects are detected
Solution Approach 1:
The patent applies dynamics by making the sensing system adaptive to the construction machine's rotation. The control unit dynamically adjusts the sensing strategy based on whether the machine is rotating or stationary, and whether objects are fixed or moving. This resolves the contradiction by enabling safe detection while avoiding unnecessary alarms from fixed objects through dynamic adjustment of detection behavior.
Solution Approach 2:
The patent changes the parameter of alarm issuance from a fixed rule to a conditional parameter. The control unit evaluates multiple parameters including machine rotation state, object movement status, and object type (fixed vs. moving) to determine whether to issue an alarm. This resolves the contradiction by making alarm generation contingent on relevant parameters rather than triggering for all detected objects.
2Measurement precision
If ultrasonic rear sensing device is applied to construction machine, then rear area sensing is improved, but side area detection is not achieved
Solution Approach 1:
The patent applies universality by designing a sensing system that performs multiple functions: detecting both rear and side areas, identifying both fixed and moving objects, and operating effectively whether the machine is rotating or stationary. The control unit universally applies the same detection logic across different areas and conditions, resolving the contradiction by making the system versatile rather than limited to rear area only.
Solution Approach 2:
The patent makes the sensing coverage dynamic by adapting to the machine's rotation. The control unit adjusts which areas are monitored based on the current rotation state, ensuring continuous coverage of rear and side areas as the machine moves. This resolves the contradiction by making the sensing system flexible and adaptable to different operational states.
3Measurement precision
If alarm sound is continuously issued for fixed objects, then detection accuracy is improved, but operator distraction increases
Solution Approach 1:
The patent changes the alarm issuance parameter from continuous to conditional. The control unit evaluates the movement status of detected objects and the machine's rotation state to determine whether to issue an alarm. Fixed objects that remain stationary relative to the ground do not trigger alarms, while moving objects do. This resolves the contradiction by making detection accuracy maintainable without causing operator distraction through selective alarm generation.
Solution Approach 2:
The patent extracts the harmful element (continuous alarming for fixed objects) from the detection system while preserving the useful element (detection accuracy). By separating fixed objects from moving objects in the detection logic, the system maintains accurate detection capability but removes the unnecessary alarm component that causes distraction. This resolves the contradiction by extracting the harmful alarm behavior while keeping the beneficial detection function.
Data Source
AI summary
The present invention relates to a device and a method for sensing (detecting) rear and side areas of construction equipment. The present invention comprises: setting a certain distance from the construction machine (or vehicles) as a safe-distance area (work pattern area); patterning fixed objects within the set safe-distance area; sounding an alarm and/or displaying a captured (or detected) image on a display when other objects excluding the fixed objects that are sensed by the construction machine (that is, the fixed objects that are patterned) are sensed.