USB Interface Data Acquisition via I2C Mode Switching
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Solution Overview
Problem
Existing data acquisition systems face challenges in efficiently acquiring data from image forming apparatuses, especially when the USB application is disabled or power generation is compromised, as they require dedicated interfaces and power sources, limiting convenience and flexibility.
Innovation Solution
A data acquisition system that utilizes a data acquisition terminal connected via a USB interface, employing a power source control circuit to switch communication modes from USB to I2C, allowing data transfer even when the USB application is disabled, using an existing interface and external power supply, thereby enabling data acquisition without additional interfaces or power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If USB application is used for data acquisition, then data can be transmitted through USB interface, but the system requires dedicated power source and USB application must be enabled
Solution Approach 1:
The USB interface is designed to serve multiple functions: normal USB communication when the application is enabled, and alternative power supply + I2C communication when the application is disabled. The power source control circuit and communication control circuit switch between these modes based on power supply status, making the interface universal and adaptable to different operational states.
Solution Approach 2:
The system dynamically switches communication modes based on the operational state of the USB application. When the application is enabled, USB communication is used; when disabled, the system transitions to I2C communication powered by the power source control circuit. This dynamic adaptation allows continuous data acquisition capability regardless of application status.
2Reliability
If additional dedicated interface and power source are provided for data acquisition, then data can be acquired in all states, but device complexity increases
Solution Approach 1:
The USB interface and power input are designed to serve dual purposes: normal operation mode and data acquisition mode. The same physical interface and power source are used in both modes, eliminating the need for dedicated separate components while maintaining reliability across all operational states.
Solution Approach 2:
The patent merges the data acquisition function with the existing USB interface and power input infrastructure. By combining multiple functions (USB communication, alternative power supply, I2C communication) into existing components, the system achieves high reliability without adding dedicated separate interfaces or power sources for data acquisition.
3Power
If power is supplied from data acquisition terminal through USB interface, then power source control circuit can operate, but USB interface must support power transmission
Solution Approach 1:
The USB interface is designed to universally support multiple functions including data transmission, power reception, and triggering alternative communication modes. The power source control circuit monitors the USB interface to detect when power is being supplied externally, and automatically switches to appropriate communication mode, making the interface highly versatile.
Data Source
AI summary
A data acquisition system includes an electronic device and a data acquisition terminal. The electronic device includes a data storage section and a first interface. The data acquisition terminal includes a terminal communication control section and a second interface to be connected to the first interface. The terminal communication control section instructs the electronic device to transmit data stored in the data storage section of the electronic device through the first interface. In response to an instruction from the terminal communication control section, the electronic device transmits the data stored in the data storage section to the data acquisition terminal by a predetermined communication scheme. The predetermined communication scheme is a communication scheme that uses a communication standard prescribed in a layer lower than an application layer in an open systems interconnection reference model.