Robot LED Fault Diagnosis via Terminal Voltage Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing robot fault diagnosis systems fail to accurately detect faults in light emitting units that indicate the operating state of industrial robots, leading to potential safety hazards when operators misinterpret the color-coded states, causing them to approach the robot incorrectly.
Innovation Solution
A fault diagnosis device for industrial robots that includes an energization control unit, a voltage detection unit, and a fault detection unit, which controls and monitors the energization of light emitting diodes (LEDs) to detect faults based on diagnostic voltage variations, allowing for accurate identification of faults without sudden changes in light emission, thereby preventing operator misinterpretation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light emitting unit emits light of a color according to the operating state of the robot, then the operator can recognize the operating state, but when a fault occurs in the LEDs or driving components, the light emitting unit may emit light of a color different from the color corresponding to the state of the robot, causing operator misinterpretation and safety hazards
Solution Approach 1:
The patent implements feedback by detecting the actual energization state of each LED and comparing it with the expected state. The voltage detection unit continuously monitors the terminal voltage of each LED, and the control unit compares the detected voltage with the commanded voltage to identify discrepancies, enabling automatic fault detection and notification to the operator.
Solution Approach 2:
The patent introduces an intermediary voltage detection unit that indirectly monitors the energization state of LEDs by measuring terminal voltage. This intermediary measurement approach allows fault detection without directly observing the light emission, enabling reliable fault identification while maintaining system simplicity.
2Measurement precision
If the system performs fault diagnosis by energizing each LED individually, then accurate fault detection can be achieved, but sudden changes in light emission may occur during diagnosis, causing operator concern and misinterpretation
Solution Approach 1:
The patent applies preliminary action by detecting the energization state of each LED through voltage measurement before actually energizing them for light emission. The control unit determines the energization state based on detected terminal voltage, enabling fault detection without causing sudden light emission changes that could confuse the operator.
Solution Approach 2:
The patent replaces the mechanical/optical observation method (directly observing light emission to determine LED state) with an electrical measurement method (measuring terminal voltage). This substitution allows accurate fault detection through voltage measurement while avoiding the harmful effect of sudden light emission changes during diagnosis.
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 effectively detects faults in the light emitting unit, ensuring operator safety by preventing misinterpretation of the robot's state, as the color changes during diagnosis are gradual and non-disruptive, maintaining the robot's operational safety during fault diagnosis.
Implementation Method 1
The terminal voltage of each light emitting diode varies depending on the energization state of the corresponding light emitting diode
Implementation Method 2
a light emitting unit that emits light of a color according to an operating state of the robot by individually energizing and lighting a plurality of types of light emitting diodes of different emission colors
Data Source
AI summary
A fault diagnosis device is configured to diagnose a fault in a light emitting unit that emits light of a color according to an operating state of a robot by individually energizing and lighting a plurality of types of LEDs of different emission colors. The fault diagnosis device includes an energization control unit that controls energization of the LEDs, a voltage detection unit that detects a diagnostic voltage that varies depending on a terminal voltage of the LEDs, and a fault detection unit that detects a fault in the light emitting unit based on a control state of energization by the energization control unit and a detected value of the diagnostic voltage by the voltage detection unit.