Automated Elevator Counterweight Inspection System
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Solution Overview
Problem
Elevator systems require frequent and time-consuming inspections to ensure compliance with codes, particularly for counterweights, which need to maintain a minimum clearance distance to prevent excessive travel and potential damage, necessitating manual checks that are inefficient and risky for maintenance personnel.
Innovation Solution
An automated counterweight inspection system with a movable frame, contact surface, and detector that captures images of an indicator element on the counterweight guard or elevator shaft wall to determine if the counterweight exceeds the minimum clearance distance, allowing for remote and efficient monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual inspection methods are used to check counterweight clearance, then inspection accuracy can be maintained, but inspection time increases and personnel safety risks increase
Solution Approach 1:
The patent replaces manual mechanical inspection with an automated optical detection system. A detector (camera) captures images of the indicator element on the counterweight, and a control unit processes these images to automatically determine counterweight position and clearance distance, eliminating the need for manual measurement while maintaining inspection accuracy.
Solution Approach 2:
The patent creates a visual copy (image) of the counterweight and indicator element using a detector. This optical copy is then analyzed by the control unit to determine clearance distance, allowing remote inspection without personnel entering the pit, thus reducing both time and safety risks while maintaining accuracy.
2Ease of operation
If manual inspection requires personnel to enter the pit, then direct observation is possible, but safety risks and operational complexity increase
Solution Approach 1:
The patent introduces an intermediary detection system consisting of a detector and control unit that remotely observes the counterweight through images of the indicator element. This intermediary system provides direct observation capability without requiring personnel to enter the hazardous pit environment, eliminating safety risks while maintaining ease of operation.
Solution Approach 2:
The detector creates an optical copy (image) of the indicator element and counterweight position, allowing operators to observe and analyze the clearance distance remotely from a safe location. This copy enables direct observation without exposure to harmful factors in the pit.
3Reliability
If frequent inspections are performed to ensure compliance, then safety is improved, but maintenance time and operational disruption increase
Solution Approach 1:
The automated optical inspection system replaces time-consuming manual measurement processes with rapid image capture and analysis. The detector can quickly capture images of the indicator element, and the control unit automatically processes these images to determine compliance, enabling frequent inspections without significant operational disruption and maintaining high maintenance 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
The system enables remote and automated inspection of counterweight travel, reducing the need for manual entry into the pit and minimizing maintenance time, ensuring timely detection of potential issues before they cause damage, thereby enhancing safety and efficiency.
Implementation Method 1
the detector captures images of the indicator element for inspection
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
Elevator systems and methods of operating elevator systems having an elevator car within an elevator shaft, a counterweight within the elevator shaft and operably connected to the elevator car (403), an indicator element (422) located in a pit of the elevator shaft, and an inspection system (412) including a detector (428) located on the elevator car (403) and arranged to detect a location of the counterweight in an inspection region within the pit based on a relative position between the counterweight and the indicator element (422).