Painting Robot Sensor Collector for High-Voltage Data Isolation
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Solution Overview
Problem
Existing painting robots face challenges with power supply and data transmission for sensors in high-voltage areas, requiring frequent battery replacements and complex opto-electronic converters, and involve multiple optical fibers for isolation.
Innovation Solution
A central collecting device in the high-voltage area collects sensor data and provides power to sensors, eliminating the need for individual batteries and opto-electronic converters, and uses fiber optic cables or wireless transmission for data and power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual batteries are used for each sensor in the high-voltage area, then the sensors can be powered independently, but the batteries must be replaced frequently which increases maintenance costs and resource consumption
Solution Approach 1:
Multiple individual sensor power supplies (batteries) are merged into a single centralized power supply unit located in the high-voltage area. This central power supply connects to all sensors through the high-voltage cable, eliminating the need for multiple separate batteries and reducing maintenance requirements.
Solution Approach 2:
The high-voltage cable that was originally used only for electrical isolation is given a dual function by integrating data transmission capability through opto-electronic converters. This allows the same cable infrastructure to serve both power delivery and data communication purposes.
2Reliability
If individual opto-electronic converters are used for each sensor, then data transmission isolation is achieved, but the system complexity increases due to the large number of converters required
Solution Approach 1:
Multiple individual opto-electronic converters are merged into a single centralized opto-electronic converter unit. This single converter handles data from all sensors, reducing the total number of converters from many individual units to just one, thereby simplifying the system architecture.
Solution Approach 2:
A central collecting device is introduced as an intermediary between the sensors and the control system. This collecting device consolidates data from multiple sensors and performs a single opto-electronic conversion, acting as a mediator that reduces the number of direct conversion points needed in the system.
3Reliability
If multiple optical fibers are used for each sensor, then electrical isolation is ensured, but the system complexity increases due to the large number of optical fibers required
Solution Approach 1:
Multiple individual optical fiber connections are merged into a single optical fiber connection. The centralized opto-electronic converter consolidates data from all sensors into a single data stream that travels through one optical fiber to the control system, eliminating the need for multiple separate fiber connections.
Solution Approach 2:
The optical fiber is given a universal role by making it the single communication channel for all sensors. Instead of each sensor having its own dedicated fiber, one optical fiber serves all sensors by carrying their consolidated data stream, maximizing the utilization of this isolation medium.
4Reliability
If fiber optic cables are used for data transmission from high-voltage area, then potential isolation is achieved, but the power supply for sensors becomes problematic requiring complex solutions
Solution Approach 1:
The high-voltage cable acts as an intermediary that bridges the power and signal transmission needs. By placing the opto-electronic converter in the high-voltage area and powering it through the same cable, the system uses the cable as a multi-functional intermediary for both energy and data isolation.
Solution Approach 2:
The power supply function and data transmission function are merged into a single integrated system. The high-voltage cable simultaneously delivers power to the centralized converter and carries the isolated data signal, combining what were previously separate functions into one unified approach.
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
Simplifies power supply and data transmission, reducing complexity and resource consumption by eliminating the need for frequent battery replacements and multiple converters, while ensuring electrical isolation.
Implementation Method 1
the data transmission of the measured values from the sensors in the high-voltage part of the painting robot to the electrically grounded part of the painting robot must therefore include potential isolation. Therefore, fiber optic cables are used for this purpose
Implementation Method 2
electrostatic coating agent charging is typically used. This means that the applied paint is electrostatically charged to a high-voltage potential while the vehicle body to be painted is electrically grounded. The applied spray jet of the paint is therefore electrostatically attracted to the electrically grounded vehicle body
Data Source
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AI summary
The invention relates to a coating device (e.g. a painting robot) for coating components (e.g. motor vehicle body components) with a coating agent (e.g. paint), comprising - a protective region (8) which is explosion-proof due to the risk of explosion (e.g. as a result of an explosive atmosphere, e.g. due to gas or dust) and/or is under high voltage during operation, - an unprotected region (9) in which an explosive atmosphere is not present or is only occasionally and very rarely present during normal operation and which is therefore not explosion-proof and/or lies at ground potential during operation, - multiple sensors (10-13) for measuring process variables of the coating device, said sensors (10-13) being arranged in the protective region (8), - a data interface (16) for an external data communication, said data interface (16) being arranged in the unprotected region (9), and - a transmission system (21) for transmitting data between the sensors (10-13) in the protective region (8) and the data interface (16) in the unprotected region (9). According to the invention, a collecting device (14) is additionally provided in the protective region (8), wherein the collecting device (14) is connected to the sensors (10-13) and obtains measurement values of the process variables from the sensors (10-13), and the collecting device is also connected to the transmission system (21) in order to transmit the measurement values of the sensors (10-13) to the data interface (16).