Elevator Threshold Alignment Using Mobile Sensor Feedback

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Solution Overview

Problem

The process of setting elevator car stopping positions is complex, error-prone, and time-consuming, requiring manual measurements and inputs that are susceptible to clerical errors, necessitating additional checks and training for technicians.

Innovation Solution

A method using a computer-controlled mobile device, such as a smartphone, to automatically measure and adjust elevator car thresholds relative to shaft thresholds via sensors and wireless communication, eliminating the need for manual input and reducing errors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual measurement and input methods are used, then technicians can set stopping positions, but the process becomes complex and error-prone requiring additional training and checks

Engineering Contradiction:

Improveaccuracy of stopping position settingVSAvoidcomplexity of measurement and input process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces manual mechanical measurement methods with an automated optical measurement system. A camera captures images of the elevator car and shaft threshold, and image processing algorithms automatically calculate height deviations, eliminating manual measurement and input operations that cause errors and complexity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system enables self-service by allowing the elevator control system to automatically measure, calculate, and adjust stopping positions without requiring technician intervention for manual measurement and data entry. The automated image processing and control algorithms perform the functions that previously required trained personnel

Inventive Principle:

Principle #25Self-service

2Manufacturing precision

If manual measurement and input methods are used, then stopping positions can be set, but the process becomes time-consuming requiring additional test runs

Engineering Contradiction:

Improveprecision of stopping position alignmentVSAvoidspeed of commissioning process

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent implements a feedback mechanism where the camera system continuously monitors the alignment between the elevator car and shaft threshold, and the control algorithm automatically adjusts the stopping position based on real-time image data. This closed-loop feedback system ensures precise alignment while reducing the need for repeated test runs

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary automatic measurement and calculation of stopping positions before final operation. By pre-calculating the optimal stopping position using image processing and control algorithms, the system eliminates the need for time-consuming manual adjustments and multiple test runs during commissioning

Inventive Principle:

Principle #10Preliminary action

3Measurement precision

If manual measurement methods are used, then stopping positions can be recorded, but clerical errors are difficult to avoid

Engineering Contradiction:

Improveaccuracy of height deviation measurementVSAvoidclerical errors in data recording

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent replaces manual data recording with automated digital image processing. The camera captures precise visual data of the thresholds, and software algorithms automatically calculate height deviations, eliminating the manual transcription process that causes clerical errors and information loss

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 method simplifies and accelerates the adjustment process, reducing errors and training requirements, allowing precise and efficient alignment of elevator car thresholds with minimal manual intervention.

Implementation Method 1

information generated using at least one component of the mobile device as a result of a height deviation between the car threshold and a current shaft threshold

Methodology Applied

Scientific EffectSensor detection:

Data Source

PatentUS12589972B2Method for controlling an elevator installation by using a computer-controlled mobile device

Publication Date: 2026.03.31 INVENTIO AG

AI summary

A method for controlling an elevator installation uses a computer-controlled mobile device. The elevator installation includes an elevator shaft having a plurality of shaft thresholds each assigned to one floor, an elevator car having a car threshold and is moveable along the elevator shaft, and a control unit for moving the elevator car. The mobile device has an evaluation unit that communicates with the control unit. Information generated using at least one component of the mobile device as a result of a height deviation between the car threshold and a shaft threshold located opposite the car threshold is received in the evaluation unit, is then evaluated and control information for moving the elevator car is generated. The control information is sent to the control unit to move the elevator car such that the height deviation between the car threshold and the shaft threshold is minimized.