Vehicular Sensor Testing via Automated I2C Script Generation
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Solution Overview
Problem
Existing vehicle vision systems require complex manual encoding and decoding of test messages for sensor testing, which is time-consuming and prone to errors, especially when using serial buses like I2C for communication between cameras and testing stations.
Innovation Solution
A method and system that utilize a test generation interface to create and transmit test scripts to vehicular sensors, abstracting the user from the specifics of the serial protocol, allowing easy generation and execution of test messages, including features like configurable parameters and message scheduling, to automate the testing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual encoding and decoding of test messages is used for sensor testing, then testing can be performed, but the process is time-consuming and prone to errors
Solution Approach 1:
The system allows sensors to perform self-testing through automated test message generation and evaluation. The testing system automatically generates test messages, transmits them to sensors, and evaluates responses without requiring manual intervention, enabling sensors to essentially test themselves while maintaining high reliability and reducing testing time
Solution Approach 2:
An automated testing system acts as an intermediary between the test operator and the sensor. This intermediary automatically generates test messages based on test parameters, transmits them through the I2C bus, and evaluates responses, eliminating the need for manual encoding and decoding while ensuring consistent and error-free testing
2Ease of operation
If manual encoding and decoding of I2C test messages is performed, then sensor testing is possible, but the process becomes complex and error-prone
Solution Approach 1:
The automated testing system serves as an intermediary that handles all complex I2C message encoding and decoding operations. The system automatically generates properly formatted test messages, manages the I2C communication protocol, and evaluates responses, shielding users from protocol complexity while simplifying the testing process
Solution Approach 2:
The patent replaces manual mechanical operations (hand-coded message creation and interpretation) with an automated electronic system. The testing system electronically generates and processes test messages automatically, substituting manual encoding/decoding operations with automated software-based message generation and evaluation
3Adaptability or versatility
If standardized test message formats are implemented across different sensor types, then compatibility is improved, but adapting to specific sensor requirements becomes challenging
Solution Approach 1:
The system implements local quality by allowing customization of test parameters for each specific sensor type while maintaining a standardized overall test message structure. Each sensor can have its own specific test parameters (such as register addresses, data formats) configured locally without affecting the standardization of the communication protocol and basic test flow
Solution Approach 2:
The system manages sensor-specific requirements through parameter changes rather than structural changes. By allowing configuration of specific test parameters (register addresses, data lengths, timing characteristics) for different sensor types, the system maintains a standardized test message format while adapting to diverse sensor requirements through flexible parameter adjustment
Data Source
AI summary
A method for testing a sensor of a vehicular sensing system includes displaying, by a processor, a test generation interface on a display screen, and receiving, by the processor, a user input based on a user interacting with the test generation interface. The method includes determining a plurality of parameters based on the user input. The method includes generating a test script based on the parameters that includes at least one test message for performing at least one system test. The method includes transmitting generated test script to a host adapter in communication with the sensor. Responsive to receiving the generated test script, the method includes transmitting, by the host adapter, the test message to the sensor to test the sensor.