Control Apparatus Error Detection and Reset Mechanism
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Solution Overview
Problem
Existing motor vehicle control systems face issues with impermissibly long signal levels at output devices due to faulty data transmission, leading to incorrect behavior in controlled devices, as they continue to apply high signal levels even with erroneous transmissions.
Innovation Solution
A control device with a receiving device, output stage, checking device, and reset device that receives data blocks, checks for errors using redundant data, and resets the output stage to a low signal level when errors are detected, ensuring no impermissibly long signal levels are maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission continues at high speed without stopping to resend erroneous blocks, then productivity is maintained, but reliability deteriorates due to incorrect device behavior from prolonged high signal levels
Solution Approach 1:
The output stage is reset to a predefined safe state before correct data is received, preventing harmful effects from erroneous data. The reset mechanism is prepared in advance and activated immediately upon error detection, ensuring that high signal levels are not applied impermissibly long to controlled devices.
2Device complexity
If the output stage retains previous state until next correct transmission, then device complexity is reduced, but harmful factors increase due to prolonged high signal levels at outputs
Solution Approach 1:
A reset mechanism is introduced that actively counteracts the harmful effect of retaining previous states. When an error is detected, the reset device immediately forces the output stage to a predefined safe state, preventing the harmful prolonged application of high signal levels to controlled devices.
3Reliability
If error detection is implemented using redundant data and checking devices, then reliability is improved, but device complexity increases
Solution Approach 1:
A checking device evaluates received data blocks for errors using redundant information (such as parity bits or checksums). When an error is detected, the checking device generates an error signal that triggers the reset mechanism, creating a feedback loop that ensures data integrity without requiring complex retransmission protocols.
Data Source
Figure 1~2
AI summary
The control apparatus according to the invention has a receiver device (10), an output stage (13), a checking device (11) and a reset device (12). The receiver device (10) serves to receive at least one data block with control instructions from a databus, the output stage (13) serves to output an output signal in accordance with the control instructions, the checking device (11) serves to output a fault signal when the at least one received data block is faulty and/or a data block is not received within a predetermined time, and the reset device (12) serves to reset the output stage (13) in a predefined state when the checking device (11) outputs the fault signal. The control apparatus can therefore react automatically to incorrectly transmitted data blocks without having to wait for responses from a transceiving central processor unit.