USB Transducer Integrating A/D Conversion for Compact Measurement Systems
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Solution Overview
Problem
Existing transducers for environmental, process, and laboratory analysis face limitations such as bulky design, high cost, and reduced accuracy due to analog signal conversion, lack of control from computers, and limited customization of application software, restricting their integration and data processing capabilities.
Innovation Solution
A USB transducer system that directly connects to a computer's USB terminal, allowing signal transmission and power supply through a single cable, enabling digital signal processing and customizable software control, thus eliminating the need for external power and A/D converters, and enhancing design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If analog transmission is used to transmit measurement data from the transducer to the computer, then the transducer can be compatible with existing systems, but an extra A/D converter device is required which increases system complexity and cost
Solution Approach 1:
The patent merges the A/D conversion function into the transducer's internal signal processing unit, combining multiple functions (signal acquisition, conversion, and processing) into a single integrated device. This eliminates the need for separate external A/D converters and reduces overall system complexity while maintaining compatibility with computer systems through standard USB interfaces.
Solution Approach 2:
The transducer is designed with multi-functionality by incorporating both analog-to-digital conversion and USB communication capabilities within a single device. This universal design allows the transducer to function independently without requiring external conversion devices, reducing the number of components needed in the system.
2Device complexity
If RS-232C serial communication is used for data transmission, then the A/D converter is not needed, but the equipment is expensive and not prevalent in the field
Solution Approach 1:
The patent changes the communication interface parameter from legacy RS-232C to modern USB interface. This parameter change allows the system to leverage the widespread adoption and cost-effectiveness of USB technology while maintaining the benefit of integrated A/D conversion, making the transducer both prevalent and cost-effective for environmental and industrial monitoring applications.
3Reliability
If GPIB interface is used for data transmission, then reliable data transmission is achieved, but the equipment becomes bulky and requires independent power supply
Solution Approach 1:
The patent merges the power supply function with the USB communication interface, where the USB connection provides both data transmission and power supply to the transducer. This integration eliminates the need for separate power supplies and reduces equipment size while maintaining reliable digital communication through the USB interface.
Solution Approach 2:
The USB interface serves multiple functions simultaneously: it provides digital data transmission, power supply, and communication protocols in a single connection. This multi-functional approach replaces the bulky GPIB interface and independent power supply requirements, creating a compact yet reliable system.
4Productivity
If multiple transducers are connected to process measurement data, then comprehensive data processing is achieved, but the overall system becomes large requiring significant space
Solution Approach 1:
The transducer incorporates multiple functions including signal acquisition, A/D conversion, data processing, and USB communication within a single integrated unit. This multi-functionality allows comprehensive data processing capabilities without requiring multiple separate devices, significantly reducing the space required for the overall system while maintaining high productivity in measurement and data analysis.
Data Source
AI summary
A USB transducer includes: an input section which receives a measurement signal from a measuring device; a controller which converts measurement data into digital data and further converts the digital data into data ready for processing by a computer; and an output section having a USB connection terminal for outputting the data generated by the controller to the computer by using a USB cable, and for receiving a control signal from the computer.