Automated Printer Test via USB Hub Power Control
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Solution Overview
Problem
The testing of factory install packages for peripherals, such as printers, in manufacturing environments is largely manual due to the need to disconnect and reconnect devices, preventing the use of automated test models that could execute multiple downloads with automated tests.
Innovation Solution
An automated system where peripherals are connected to a hub and a controllable power source, allowing for automated power control and script execution to test printer installations without manual intervention, enabling programmatic verification of printer driver installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If peripherals are connected to test machine during factory install download testing, then automated test execution is enabled, but peripheral cannot be properly tested since it needs to be disconnected
Solution Approach 1:
A USB hub is introduced as an intermediary device between the test machine and the peripheral. The hub allows the test machine to maintain a connected state while the peripheral can be selectively powered on or off. This mediator enables automated testing by decoupling the physical connection requirement from the operational state of the peripheral, allowing tests to execute automatically without manual disconnection/reconnection actions.
2Reliability
If peripheral is disconnected after download to enable proper testing, then test validity is ensured, but automated test model cannot be used requiring manual interaction
Solution Approach 1:
The USB hub serves as a mediator that remains connected to the test machine while controlling power delivery to the peripheral. This allows the test machine to execute automated test scripts without manual intervention, as the hub handles the peripheral's power state changes programmatically. The intermediary enables full automation while maintaining test validity through proper peripheral isolation during testing phases.
Solution Approach 2:
The system performs preliminary actions by pre-configuring the USB hub's power control capabilities before the actual download and test sequence. The hub is programmed with the test sequence, allowing it to automatically power on the peripheral for installation, power it off for testing, and restore it afterward. This preliminary setup enables the entire test process to run automatically without manual intervention during execution.
3Reliability
If manual disconnection and reconnection of peripheral is performed, then proper testing is achieved, but testing time and manpower increase significantly
Solution Approach 1:
The manual mechanical action of physically disconnecting and reconnecting the peripheral is replaced by an electronic control system. The USB hub's power control circuitry automatically manages the peripheral's power state through electrical signals, eliminating the need for manual plugging and unplugging. This substitution maintains proper testing conditions while dramatically reducing testing time and eliminating manual labor, thereby improving productivity.
Data Source
AI summary
A system for performing an automated factory install peripheral test process. The system is configured so that peripherals (e.g., printers) to be tested are coupled to a hub (such as a USB hub) that is then coupled to a download test system. The download test system is coupled to the network to allow for factory install download testing. The peripherals to be tested are all plugged in to a controllable power source (such as a controllable power strip). This power source is coupled to the download test system via, e.g., a USB connection, thus allowing commands to be sent to the power source by the download test system. The peripherals being tested each have their power buttons set to an on position, but the power source is initially set so that none of the peripherals have power applied to them.