Collision prevention control system based on electric lifting table and collision prevention method thereof
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Solution Overview
Problem
Current electric lifting tables have poor sensitivity in detecting resistance during the lifting process, leading to low safety performance, as they can only effectively sense large resistances or rely on vibration sensors.
Innovation Solution
A collision prevention control system for electric lifting tables equipped with an acceleration and gyroscope chip, which interacts with a single-chip microcomputer to build coordinate systems, calculate angular variations, and use a Kalman Filter Algorithm to detect resistance by comparing angular changes with threshold values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current detection method is used, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent replaces the traditional current-based detection method with an acceleration sensor-based detection method. The acceleration sensor detects resistance by measuring changes in acceleration during the lifting process, substituting the mechanical/electrical current detection approach with a sensor-based physical measurement approach, thereby improving detection sensitivity without significantly increasing system complexity
Solution Approach 2:
The patent changes the detection parameter from motor current to acceleration. By monitoring acceleration changes during the lifting process, the system can detect resistance encounters more sensitively. The control method analyzes acceleration data to determine when resistance is encountered, representing a fundamental parameter change in the detection approach
2Measurement precision
If vibration sensor is used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The acceleration sensor serves multiple functions: it detects resistance encounters during lifting, monitors the lifting process dynamics, and provides data for control decisions. This multi-functionality reduces the need for separate vibration sensors, thereby improving measurement precision while limiting the increase in device complexity
Solution Approach 2:
The acceleration sensor utilizes the existing motion and vibration of the lifting table during operation to detect resistance. The sensor leverages the natural dynamics of the system itself rather than requiring additional active sensing mechanisms, allowing it to perform resistance detection using the system's own operational characteristics
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 provides higher sensitivity and reliability in detecting slight angular or acceleration changes, effectively preventing collisions by accurately judging resistance encounters during operation.
Implementation Method 1
when the lifting table stays still or moves at a constant speed, the acceleration and gyroscope chip being subjected to a gravity acceleration only
Implementation Method 2
the acceleration and gyroscope chip generating a rotational motion on at least one axis of the axes X1, axis Y1 and axis Z1, using a method of calculating an angle with the gravity acceleration and a method of calculating an angle with a rotational angular velocity of a gyroscope
Data Source
AI summary
A collision prevention control system based on an electric lifting table and a collision prevention method thereof are provided. The collision prevention control system includes a lifting table, an electronic lifting table control box disposed on the lifting table, and a single-chip microcomputer disposed in the electric lifting table control box. The electric lifting table control box is internally provided with an acceleration and gyroscope chip, the acceleration and gyroscope chip performing synchronous motion with the lifting table, the acceleration and gyroscope chip being in information interaction with the single-chip microcomputer, and motion control on the lifting table being performed through the single-chip microcomputer. The collision prevention control system has the advantageous effects as follows: has higher sensitivity and more reliable operation, and senses a slight angular change or an acceleration change when the lifting table encounters resistance.