Electric lifting platform retractable upon hitting obstruction

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Solution Overview

Problem

Existing electric lifting platforms face challenges in detecting obstructions due to poor sensitivity, susceptibility to temperature, and demanding installation requirements, leading to potential damage and safety risks.

Innovation Solution

An electric lifting platform with a multi-axis sensor module connected to a controller, which processes obstruction-hitting data to control a retracting movement, using six-axis sensors and a central processing unit to detect accelerations and angular velocities, enhancing sensitivity and safety without requiring direct contact with stress-bearing surfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If mechanical sensor-based detection is used, then detection sensitivity can be improved, but the sensor must be installed at positions with prominent stress variation, posing higher requirements on installation

Engineering Contradiction:

Improvedetection sensitivityVSAvoidinstallation requirement

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent replaces mechanical sensors that require direct contact with stress-bearing surfaces with a multi-axis sensor module that detects acceleration and angular velocity. This substitution eliminates the need for complex mechanical installation while maintaining high detection sensitivity through non-contact measurement of motion parameters.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a multi-axis sensor module as an intermediary that indirectly detects obstruction-hitting events through acceleration and angular velocity measurements, rather than directly sensing stress at critical points. This intermediary approach simplifies installation while preserving detection capability.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If current characteristic detection upon impact is used, then the system can detect impacts, but the scheme has poor sensitivity, is largely susceptible to temperature, and is easily affected by assembly of the lift platform

Engineering Contradiction:

Improveimpact detection capabilityVSAvoiddetection sensitivity

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent replaces current characteristic detection with a multi-axis sensor module that measures acceleration and angular velocity. This substitution eliminates susceptibility to temperature and assembly variations while improving detection sensitivity through direct measurement of mechanical motion parameters.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If desktop tilt angle detection is used, then the system can detect impacts, but a very large pressure is required for a soft impact to cause variation of the tilt angle, which greatly degrades the safety

Engineering Contradiction:

Improveimpact detection capabilityVSAvoidsafety risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces tilt angle detection with a multi-axis sensor module that directly measures acceleration and angular velocity. This substitution enables detection of soft impacts with much lower force requirements, thereby improving safety by reducing the threshold for obstruction detection.

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 solution provides improved detection sensitivity and safety by allowing the platform to retract upon hitting an obstruction, simplifying installation, and enhancing reliability and aesthetics, while avoiding misjudgment of normal lifts as impacts.

Implementation Method 1

the multi-axis sensor module includes a central processing unit and a six-axis sensor module... the six-axis sensor module includes a three-axis accelerometer configured for acquiring three-axis acceleration data

Methodology Applied

Scientific EffectAcceleration detection: Accelerometer

Implementation Method 2

the six-axis sensor module includes a three-axis gyroscope configured for acquiring three-axis angular velocity data

Methodology Applied

Scientific EffectAngular velocity detection: Gyroscope

Data Source

PatentUS11284709B2Electric lifting platform retractable upon hitting obstruction

Publication Date: 2022.03.29 ZHEJIANG JIECHANG LINEAR MOTION TECH

AI summary

An electric lifting platform retractable upon hitting an obstruction includes a lifting column, a platform, a controller, and a manipulator. The controller comprises a main control unit and a motor driving circuit. An output end of the main control unit is connected to the motor driving circuit. The electric lifting platform further includes a multi-axis sensor module for acquiring obstruction-hitting data of the platform. As the multi-axis sensor module is connected to an input end of the main control unit, the main control unit transmits a control signal to the motor driving circuit after processing the obstruction-hitting data, and the motor driving circuit controls the lifting column to execute a corresponding retracting movement.