Multi-Channel Electrical Measurement Cards for High-Frequency Testing
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Solution Overview
Problem
Existing measurement systems for electrical characteristics in environmental testing are expensive, have low accuracy, limited measurement frequencies, and require numerous physical connections, leading to communication losses and compatibility issues, with high current consumption affecting reliability and introducing errors.
Innovation Solution
A measurement apparatus with a base board hosting multiple circuit boards, each equipped with voltage and current measurement modules, featuring automatic range selection and high-frequency sampling, enabling simultaneous and accurate measurement of electrical characteristics across multiple channels, and using ethernet or optical fiber connections for robust communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple measurement cards are used to test multiple devices simultaneously, then productivity increases, but device complexity and communication losses increase due to numerous physical connections
Solution Approach 1:
The measurement system is divided into multiple independent measurement cards, each capable of testing one or more devices. Each card has its own microcontroller and measurement circuitry, allowing parallel operation without requiring extensive inter-card connections. This segmentation enables high productivity while keeping each card's connection requirements manageable.
Solution Approach 2:
Each measurement card is designed with universal functionality to test multiple device types and power modes through a single interface. The cards can measure voltage, current, and power across different operating conditions without requiring separate dedicated hardware for each test scenario, reducing the overall number of physical connections needed in the system.
2Measurement precision
If measurement frequency is increased to monitor test units continuously, then measurement precision improves, but current consumption increases affecting reliability
Solution Approach 1:
The measurement system dynamically adjusts its operation mode based on current consumption levels. When current draw exceeds thresholds, the system automatically reduces measurement frequency or enters low-power mode, preventing reliability issues while maintaining measurement precision when conditions permit. This dynamic adaptation allows high precision measurements without continuously high power consumption.
Solution Approach 2:
Instead of continuous high-frequency measurement, the system uses periodic sampling at variable intervals. The measurement frequency is adjusted based on test requirements and power availability, performing high-precision measurements only when necessary while reducing activity during stable operating conditions to minimize current consumption and maintain reliability.
3Measurement precision
If more measurement channels are added to cover all voltage and current measurements, then measurement precision improves, but device complexity increases
Solution Approach 1:
Multiple measurement functions (voltage, current, power) are merged into integrated measurement circuits on each card. The system combines multiple measurement channels into unified measurement units that can handle different electrical characteristics simultaneously, reducing the overall system complexity while maintaining comprehensive measurement precision through coordinated multi-channel operation.
Data Source
AI summary
An apparatus for measuring electrical characteristics of a test system includes a base board and an interface. The base board is arranged to host circuit boards. Each circuit board includes a measurement module. The base board includes an interface configured to connect with the test system. The interface is arranged to receive a current, on a current channel, from the test system, and voltages, on respective voltage channels, from the test system. The circuit boards include one or more voltage testing modules. Each voltage testing module includes voltage measurement units. Each voltage measurement unit is configured to measure a voltage on a respective voltage channel. The circuit boards include a current testing module configured to measure a current on the current channel. The interface is arranged to output voltage information from the one or more voltage testing modules and current information from the current testing module.