Voltage Reducing Means for Addressing Electronic Devices in Transportation Buses
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Solution Overview
Problem
In transportation systems, existing addressing methods for electronic devices connected to a common data bus are inefficient, particularly when devices need to be replaced or added, as they disrupt the operation of other devices by interrupting the power supply until new devices are addressed, leading to downtime and maintenance challenges.
Innovation Solution
The implementation of electronic devices with a power bus interface and voltage reducing means that allow controlled voltage reduction, enabling efficient and automatic addressing by influencing which device receives the addressing turn, ensuring that devices farther away still receive a limited operating voltage and preventing operational hindrance during maintenance or device replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a slave device prevents the passage of operating voltage on the power bus to enable addressing, then the addressing operation can be performed, but the operation of other devices farther away on the bus is interrupted
Solution Approach 1:
The power bus is segmented into multiple sections by introducing voltage reducing means at different positions. Each segment can independently control voltage passage, allowing addressing operations in one segment without completely interrupting power supply to other segments. This enables parallel operation of addressing and maintenance activities.
Solution Approach 2:
Instead of a uniform voltage blocking approach across the entire bus, the invention applies local voltage reduction at specific positions where addressing is needed. The voltage reducing means are strategically placed to affect only local segments, allowing other parts of the bus to maintain full operating voltage and continue functioning.
2Ease of repair
If a new slave device is installed without an address, then the device can be physically replaced, but the power bus remains down until addressing is completed
Solution Approach 1:
The voltage reducing means are pre-installed at strategic positions on the power bus before any addressing operations or device replacements occur. This preliminary configuration enables immediate local voltage control, allowing maintenance workers to replace devices and perform addressing operations without waiting for system-wide voltage management setup, thereby reducing downtime.
Solution Approach 2:
The voltage reducing means act as intermediary components between the power source and slave devices. They mediate the power distribution by selectively reducing voltage in specific segments, allowing the system to maintain partial operation during device replacement and addressing, thus bridging the gap between replacement activity and full system restoration.
3Reliability
If voltage is completely blocked on the power bus for addressing, then addressing can be performed, but devices farther away receive zero voltage and cannot operate
Solution Approach 1:
The voltage reducing means provide dynamic voltage control, allowing the system to transition between different voltage states (full voltage, reduced voltage, or blocked voltage) based on operational needs. This dynamic adjustment enables the bus to maintain optimal voltage for device operation in non-addressing segments while providing controlled voltage reduction in segments where addressing is正在进行.
Solution Approach 2:
Instead of binary voltage control (fully on or fully off), the invention introduces intermediate voltage states through voltage reducing means. This parameter change approach allows voltage to be adjusted to specific levels that are sufficient for device operation but reduced enough to prevent interference with addressing operations, thereby maintaining both addressing capability and device operability simultaneously.
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
This solution allows for quick, easy, and automatic addressing, ensuring that all devices on the bus can operate continuously, even during maintenance or device replacement, by efficiently managing the addressing process and maintaining a stable power supply.
Implementation Method 1
voltage reducing means for selectively performing a controlled voltage reduction between said power bus input interface and power bus output interface
Data Source
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AI summary
An electronic device (201) of a transportation means comprises a power bus input interface (202), a power bus output interface (203), and a data bus interface (204). The device comprises voltage reducing means (205) for selectively performing a controlled voltage reduction between the power bus input interface (202) and the power bus output interface (203). The reduced operating voltage is lower than the operating voltage received via the power bus input interface (202) but higher than zero. The device is arranged to use (1201, 1202) said voltage reducing means depending in a predetermined manner on whether or not the device has performed addressing operations to carry out addressed data communication by means of said data bus.