Relay-Switched Communication Link Testing for Fault Conditions
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Solution Overview
Problem
Existing communication technologies face challenges in testing fault-tolerant capacity and signal characteristics due to complex industrial and onboard environments, leading to issues like short circuits, open circuits, potential fluctuations, and waveform quality deterioration.
Innovation Solution
A communication link operating characteristic testing system utilizing a relay combination circuit board, simulation assembly, and interface assembly, which includes devices like a program-controlled oscilloscope and programmable power supply, to simulate various working environments and test devices under differential communication technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual testing methods are used for communication devices, then testing flexibility is maintained, but testing completeness and reliability are insufficient due to human error and negligence
Solution Approach 1:
The testing system automatically configures itself by receiving test parameters, determining the required test environment, and autonomously connecting the appropriate test devices through the relay combination circuit board without requiring manual intervention for each test setup
Solution Approach 2:
The system incorporates automatic judgment logic that evaluates test results and provides feedback to control the relay circuit board, enabling automated determination of whether communication links meet specified requirements and reducing reliance on manual assessment
2Productivity
If multiple test devices are manually connected to simulate different working environments, then testing versatility is achieved, but testing efficiency and speed are reduced due to complex manual configuration
Solution Approach 1:
The relay combination circuit board dynamically reconfigures test connections based on received test parameters, automatically switching between different test device configurations to simulate various working environments including normal conditions, short circuits, open circuits, and interference scenarios
Solution Approach 2:
The relay combination circuit board serves as a universal switching matrix that can connect any test device to any interface assembly, enabling a single system to perform multiple test functions across different communication protocols and fault conditions without requiring dedicated hardware for each test type
3Reliability
If comprehensive test environments are constructed to cover all possible fault conditions, then testing completeness is improved, but system complexity and setup time increase
Solution Approach 1:
The system pre-configures multiple interface assemblies (H_in, L_in, GND_in, DUT_BAT, DUT_GND) with dedicated connection terminals, and the relay combination circuit board pre-establishes switching paths for various fault conditions, enabling rapid test setup without manual configuration for each test scenario
Solution Approach 2:
The test system is segmented into independent interface assemblies, each handling specific signal types (differential signals, power, ground), allowing modular testing of different communication aspects simultaneously and reducing the time required to configure comprehensive test environments
Data Source
AI summary
A communication link operating characteristic testing system includes: a relay combination circuit board, a simulation assembly and an interface assembly. The simulation assembly is arranged on the relay combination circuit board. The interface assembly is arranged on the relay combination circuit board, and the interface assembly is configured to connect with a DUT. The relays on the combination circuit board are turned on/off to connect the DUT to the required devices in the simulation assembly, so that the DUT can be tested under the working environment simulated by the simulation assembly. The system can cope with different working conditions, test and verify the various signal characteristics of the DUT and the operating characteristics of the DUT under various working conditions, which is applicable to various differential communication technologies and avoids negligence caused by manual testing.