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CN-224203616-U - Signal chain diagnosis system

CN224203616UCN 224203616 UCN224203616 UCN 224203616UCN-224203616-U

Abstract

The application discloses a signal chain diagnosis system which comprises a diagnosis execution module, a main functional circuit, a control module and a verification module, wherein the diagnosis execution module is provided with an input end, a first output end and a control end, the input end receives a signal to be processed, the control end receives a diagnosis trigger instruction, the main functional circuit is provided with an input end and an output end, the input end is coupled with the first output end of the diagnosis execution module, the output end provides a diagnosis output signal, the control module is provided with two output ends, the first output end provides a diagnosis trigger instruction, the second output end provides a verification trigger instruction, the verification module is provided with two input ends, the first input end receives the verification trigger instruction, the second input end receives the diagnosis output signal, and the diagnosis execution module responds to the diagnosis trigger instruction to generate a first recombined signal and/or a second recombined signal or responds to the diagnosis trigger instruction to transmit the signal to be processed to the main functional circuit. Through the technical scheme, multiplexing of the main functional circuit can be realized, and the diagnosis coverage rate of the signal chain is improved.

Inventors

  • LIAO XINYUAN
  • ZHANG HAO

Assignees

  • 苏州纳芯微电子股份有限公司

Dates

Publication Date
20260505
Application Date
20250506

Claims (11)

  1. 1. A signal chain diagnostic system, the system comprising: The diagnosis execution module (10) is provided with an input end, a first output end and a control end, wherein the input end receives a signal to be processed, and the control end receives a diagnosis trigger instruction; -a main functional circuit (20) having an input coupled to a first output of the diagnostic execution module (10) and an output providing a diagnostic output signal; A control module (30) having a first output and a second output, wherein the first output provides the diagnostic trigger instruction and the second output provides the verification trigger instruction; A verification module (40) having a first input and a second input, wherein the first input receives the verification trigger instruction and the second input receives the diagnostic output signal; The diagnostic execution module (10) generates a first and/or a second recombined signal from the signal to be processed in response to the diagnostic trigger instruction, or The diagnostic execution module (10) communicates the signal to be processed to the main function circuit (20) in response to the diagnostic trigger instruction.
  2. 2. A signal chain diagnostic system according to claim 1, wherein the control module (30) periodically generates the diagnostic trigger and the verification trigger.
  3. 3. The signal chain diagnostic system of claim 1, wherein the system further comprises: A signal acquisition module (50) having an input and an output, wherein the input receives the raw signal and the output provides a signal to be processed.
  4. 4. A signal chain diagnostic system according to claim 1, wherein the main functional circuit (20) comprises: An analog front end (21) having an input and an output, wherein the input receives at least one of the first recombined signal, the second recombined signal or the signal to be processed, and the output provides one of a first diagnostic signal, a third diagnostic signal or a first processed signal; An analog-to-digital converter (22) having an input and an output, wherein the input receives one of the first diagnostic signal, the third diagnostic signal, or the first processed signal, and the output provides one of a second diagnostic signal, a fourth diagnostic signal, or a second processed signal; A digital processor (23) having an input receiving one of the second diagnostic signal, the fourth diagnostic signal or the second processed signal and an output providing one of the diagnostic output signal or the processed output signal.
  5. 5. A signal chain diagnostic system according to claim 4, wherein a first output of the diagnostic execution module (10) provides a first recombined signal when the diagnostic trigger is in a first state; -an input of the analog front end (21) receives the first recombined signal, an output of the analog front end (21) providing a first diagnostic signal; -an input of the analog-to-digital converter (22) receives the first diagnostic signal, an output of the analog-to-digital converter (22) providing the second diagnostic signal; -an input of the digital processor (23) receives the second diagnostic signal, an output of the digital processor (23) providing the diagnostic output signal; The verification module (40) compares the diagnostic output signal with a first preset standard signal in response to the verification trigger instruction and determines a diagnostic verification result based on the comparison result.
  6. 6. A signal chain diagnostic system as claimed in claim 4, wherein the number of analog front ends (21) is one or more, The number of the analog-to-digital converters (22) is equal to the number of the analog front ends (21), and the analog-to-digital converters (22) are in one-to-one correspondence with the analog front ends (21).
  7. 7. A signal chain diagnostic system according to claim 6, characterized in that when the number of analog front ends (21) is two, the diagnostic execution module (10) further has a second output, the first and second outputs of the diagnostic execution module (10) being coupled with the inputs of two analog front ends (21), respectively; When the diagnosis trigger instruction is in a first state, a first output end of the diagnosis execution module (10) provides the first recombined signal, and a second output end of the diagnosis execution module (10) provides the second recombined signal; The input end of one analog front end (21) of the two analog front ends (21) receives the first recombined signal, the output end provides the first diagnosis signal, the input end of the other analog front end (21) of the two analog front ends (21) receives the second recombined signal, and the output end provides the third diagnosis signal; The input end of one analog-to-digital converter (22) of the two analog-to-digital converters (22) receives the first diagnosis signal, the output end provides the second diagnosis signal, the input end of the other analog-to-digital converter (22) of the two analog-to-digital converters (22) receives the third diagnosis signal, and the output end provides the fourth diagnosis signal; -an input of the digital processor (23) receives the second diagnostic signal and the fourth diagnostic signal, -an output provides the diagnostic output signal.
  8. 8. The signal chain diagnostic system of claim 4, wherein the system further comprises: A pattern generator (60) having an input end and an output end, wherein the input end receives the diagnosis trigger instruction and the output end provides a second preset standard signal; the input end of the main function circuit (20) is coupled with the output end of the pattern generator (60) and receives the second preset standard signal.
  9. 9. A signal chain diagnostic system according to claim 8, wherein the output of the pattern generator (60) provides a second predetermined standard signal when the diagnostic trigger is in the first state; The input end of the analog front end (21) receives the second preset standard signal, and the output end of the analog front end (21) provides a fifth diagnosis signal; -an input of the analog-to-digital converter (22) receives the fifth diagnostic signal, an output of the analog-to-digital converter (22) providing a sixth diagnostic signal; -an input of the digital processor (23) receives the sixth diagnostic signal, -an output of the digital processor (23) provides the diagnostic output signal.
  10. 10. A signal chain diagnostic system according to claim 4, wherein the first output of the diagnostic execution module (10) provides the signal to be processed when the diagnostic trigger is in the second state, and wherein the input of the main functional circuit (20) receives the signal to be processed.
  11. 11. A signal chain diagnostic system as claimed in claim 10, wherein said analog front end (21) has an input for receiving said signal to be processed and an output for providing a first processed signal; An input end of the analog-to-digital converter (22) receives the first processing signal, and an output end provides a second processing signal; -an input of the digital processor (23) receives the second processed signal and an output provides the processed output signal.

Description

Signal chain diagnosis system Technical Field The application relates to the technical field of circuits, in particular to a signal chain diagnosis system. Background The sensor is used as a core unit for sensing the environment and the state of the vehicle, and the data reliability of the sensor directly determines the realization of the safety function of the whole vehicle. Taking an angle sensor as an example, if a signal chain circuit fails, single-point faults possibly violate target safety indexes, and traffic safety is threatened. Traditional security mechanisms improve diagnostic coverage through redundant designs or independent diagnostic modules, but such schemes significantly increase chip area and design complexity. For the failure mode of the signal chain, the related art needs to additionally configure a special detection circuit or parallel redundant channels, which results in cost increase. The partial scheme tries to multiplex partial main function circuits for self-checking, but has two major limitations that firstly multiplexing logic does not systematically cover the full path of a signal chain, so that the risk of a residual failure mode is caused, and secondly, the detection period and the main function operation time sequence are not sufficiently coupled, and signal delay or misjudgment can be introduced. For example, conventional periodic detection may affect output continuity by interrupting the main signal processing flow, especially in high-speed dynamic scenarios where data distortion is likely to occur. Disclosure of utility model In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present application is how to improve the diagnostic coverage and the identification reliability for the signal chain. In order to solve at least one technical problem set forth above, the application discloses a signal chain diagnosis system. According to an aspect of the present application, there is provided a signal chain diagnosis system including: the diagnosis execution module is provided with an input end, a first output end and a control end, wherein the input end receives a signal to be processed, and the control end receives a diagnosis trigger instruction; The main functional circuit is provided with an input end and an output end, wherein the input end is coupled with the first output end of the diagnosis execution module, and the output end provides a diagnosis output signal; The control module is provided with a first output end and a second output end, wherein the first output end provides a diagnosis trigger instruction, and the second output end provides a verification trigger instruction; the verification module is provided with a first input end and a second input end, wherein the first input end receives a verification trigger instruction, and the second input end receives a diagnosis output signal; The diagnosis execution module responds to the diagnosis trigger instruction and generates a first recombined signal and/or a second recombined signal according to the signal to be processed, or, The diagnostic execution module transmits a signal to be processed to the main function circuit in response to the diagnostic trigger instruction. Optionally, the control module periodically generates a diagnostic trigger and a verification trigger. Optionally, the system further comprises: The signal acquisition module is provided with an input end and an output end, wherein the input end receives an original signal, and the output end provides a signal to be processed. Optionally, the main function circuit includes: The analog front end is provided with an input end and an output end, wherein the input end at least receives one of a first recombined signal, a second recombined signal or a signal to be processed, and the output end provides one of a first diagnosis signal, a third diagnosis signal or a first processing signal; The analog-to-digital converter is provided with an input end and an output end, wherein the input end receives one of a first diagnosis signal, a third diagnosis signal or a first processing signal, and the output end provides one of a second diagnosis signal, a fourth diagnosis signal or a second processing signal; And a digital processor having an input and an output, wherein the input receives one of the second diagnostic signal, the fourth diagnostic signal, or the second processed signal, and the output provides one of the diagnostic output signal or the processed output signal. Optionally, when the diagnosis trigger instruction is in the first state, the first output end of the diagnosis execution module provides a first reorganization signal; The input end of the analog front end receives the first recombined signal, and the output end of the analog front end provides a first diagnosis signal; the input end of the analog-to-digital converter receives the first diagnosis signal, and the output end of the analog-to-