Signal chain diagnosis system and signal chain diagnosis method

Abstract

The invention discloses a signal chain diagnosis system and method, and the system comprises a diagnosis execution module which is provided with an input end, a first output end, and a control end, the input end receives a to-be-processed signal, and the control end receives a diagnosis triggering instruction; the main function 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, and 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, and the second output end provides a verification trigger instruction; the verification module is provided with two input ends, 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 to generate a first recombination signal and / or a second recombination signal, or responds to the diagnosis trigger instruction to transmit a to-be-processed signal to the main function circuit. According to the technical scheme, multiplexing of the main function circuit can be realized, and the diagnosis coverage rate of the signal chain is improved.

Description

Technical Field

[0001] The present application relates to the field of circuit technology, and specifically to a signal chain diagnosis system and a signal chain diagnosis method. Background Art

[0002] Sensors are the core units that enable a vehicle to perceive its environment and status. The reliability of their data directly determines the safety features of the entire vehicle. For example, if an angle sensor fails in its signal chain, it could result in a single point of failure, violating target safety indicators and threatening driving safety.

[0003] Traditional safety mechanisms improve diagnostic coverage through redundant designs or independent diagnostic modules, but such solutions significantly increase chip area and design complexity. For signal chain failure modes, related technologies require additional dedicated detection circuits or parallel redundant channels, resulting in increased costs. Some solutions attempt to reuse some main functional circuits for self-testing, but there are two major limitations: first, the reused logic does not systematically cover the entire path of the signal chain, resulting in residual failure mode risks; second, the detection cycle is insufficiently coupled with the main function operation timing, which may introduce signal delays or misjudgments. For example, traditional periodic detection may affect output continuity by interrupting the main signal processing process, especially in high-speed dynamic scenarios, which can easily cause data distortion. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by this application is how to improve the diagnostic coverage and recognition reliability of the signal chain.

[0005] In order to solve at least one of the technical problems raised above, the present application discloses a signal chain diagnosis system and a signal chain diagnosis method.

[0006] According to one aspect of the present application, a signal chain diagnostic system is provided, comprising:

[0007] A diagnosis execution module has an input terminal, a first output terminal and a control terminal, wherein the input terminal receives a signal to be processed, and the control terminal receives a diagnosis trigger instruction;

[0008] a main function circuit having an input terminal and an output terminal, wherein the input terminal is coupled to the first output terminal of the diagnosis execution module, and the output terminal provides a diagnosis output signal;

[0009] A control module having a first output terminal and a second output terminal, wherein the first output terminal provides the diagnosis trigger instruction and the second output terminal provides the verification trigger instruction;

[0010] A verification module having a first input terminal and a second input terminal, wherein the first input terminal receives the verification trigger instruction, and the second input terminal receives the diagnostic output signal;

[0011] The diagnosis execution module generates a first recombined signal and / or a second recombined signal according to the signal to be processed in response to the diagnosis trigger instruction; or

[0012] The diagnosis execution module transmits the signal to be processed to the main function circuit in response to the diagnosis trigger instruction.

[0013] Optionally, the control module periodically generates the diagnosis trigger instruction and the verification trigger instruction.

[0014] Optionally, the system further comprises:

[0015] The signal acquisition module has an input end and an output end, wherein the input end receives the original signal and the output end provides the signal to be processed.

[0016] Optionally, the main functional circuit includes:

[0017] an analog front end 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 the first diagnostic signal, the third diagnostic signal, or the first processed signal;

[0018] an analog-to-digital converter having an input terminal and an output terminal; wherein the input terminal receives one of the first diagnostic signal, the third diagnostic signal, or the first processed signal, and the output terminal provides one of the second diagnostic signal, the fourth diagnostic signal, or the second processed signal;

[0019] A digital processor has an input terminal and an output terminal; wherein the input terminal receives one of the second diagnostic signal, the fourth diagnostic signal or the second processed signal, and the output terminal provides one of the diagnostic output signal or the processed output signal.

[0020] Optionally, when the diagnosis trigger instruction is in a first state, the first output terminal of the diagnosis execution module provides a first reorganization signal;

[0021] An input end of the analog front end receives the first recombined signal, and an output end of the analog front end provides a first diagnostic signal;

[0022] An input terminal of the analog-to-digital converter receives the first diagnostic signal, and an output terminal of the analog-to-digital converter provides the second diagnostic signal;

[0023] An input terminal of the digital processor receives the second diagnostic signal, and an output terminal of the digital processor provides the diagnostic output signal;

[0024] The verification module compares the diagnostic output signal with a first preset standard signal in response to the verification trigger instruction, and determines a diagnostic verification result according to the comparison result.

[0025] Optionally, the number of the analog front end is one or more,

[0026] The number of the analog-to-digital converters is equal to the number of the analog front ends, and the analog-to-digital converters correspond one-to-one to the analog front ends.

[0027] Optionally, when the number of the analog front ends is two, the diagnosis execution module further has a second output terminal, and the first output terminal and the second output terminal of the diagnosis execution module are respectively coupled to the input terminals of the two analog front ends;

[0028] When the diagnosis trigger instruction is in the first state, the first output terminal of the diagnosis execution module provides the first recombined signal, and the second output terminal of the diagnosis execution module provides the second recombined signal;

[0029] An input terminal of one of the two analog front ends receives the first recombined signal, and an output terminal provides the first diagnostic signal; an input terminal of the other analog front end of the two analog front ends receives the second recombined signal, and an output terminal provides a third diagnostic signal;

[0030] An input terminal of one of the two analog-to-digital converters receives the first diagnostic signal, and an output terminal provides the second diagnostic signal; an input terminal of the other of the two analog-to-digital converters receives the third diagnostic signal, and an output terminal provides a fourth diagnostic signal;

[0031] An input terminal of the digital processor receives the second diagnostic signal and the fourth diagnostic signal, and an output terminal provides the diagnostic output signal.

[0032] Optionally, the system further comprises:

[0033] A pattern generator having an input terminal and an output terminal; wherein the input terminal receives the diagnostic trigger instruction, and the output terminal provides a second preset standard signal;

[0034] An input terminal of the main function circuit is coupled to an output terminal of the pattern generator and receives the second preset standard signal.

[0035] Optionally, when the diagnosis trigger instruction is in the first state, the output terminal of the pattern generator provides a second preset standard signal;

[0036] The input end of the analog front end receives the second preset standard signal, and the output end of the analog front end provides a fifth diagnostic signal;

[0037] An input terminal of the analog-to-digital converter receives the fifth diagnostic signal, and an output terminal of the analog-to-digital converter provides a sixth diagnostic signal;

[0038] An input terminal of the digital processor receives the sixth diagnostic signal, and an output terminal of the digital processor provides the diagnostic output signal.

[0039] Optionally, when the diagnosis trigger instruction is in the second state, the first output end of the diagnosis execution module provides the signal to be processed, and the input end of the main function circuit receives the signal to be processed.

[0040] Optionally, the input end of the analog front end receives the signal to be processed, and the output end provides a first processed signal;

[0041] The analog-to-digital converter receives the first processed signal at its input and provides a second processed signal at its output;

[0042] The digital processor receives the second processed signal at its input and provides the processed output signal at its output.

[0043] According to a second aspect of the present application, a signal chain diagnosis method is further provided, including:

[0044] Obtaining a diagnosis trigger instruction and an original signal; the original signal includes at least any one of a signal to be diagnosed, a signal to be processed, and a second preset standard signal;

[0045] When the diagnosis trigger instruction is in the first state and the original signal is the signal to be diagnosed, obtaining a first recombined signal according to the signal to be diagnosed;

[0046] inputting the first recombined signal into a main function circuit to generate a first diagnostic output signal;

[0047] A signal verification result is determined according to the first diagnostic output signal and a first preset standard signal.

[0048] Optionally, the method further includes:

[0049] When the diagnosis trigger instruction is in the first state and the original signal is the signal to be diagnosed, obtaining a second recombined signal according to the signal to be diagnosed;

[0050] inputting the second recombined signal into the main function circuit to generate a second diagnostic output signal;

[0051] The signal verification result is determined according to the first diagnostic output signal and the second diagnostic output signal.

[0052] Optionally, the method further includes:

[0053] When the diagnosis trigger instruction is in the first state and the original signal is the second preset standard signal, the second preset standard signal is input into the main function circuit to generate a third diagnosis output signal;

[0054] Calculating a standard output signal based on the second preset standard signal;

[0055] The signal verification result is determined according to the third diagnostic output signal and the standard output signal.

[0056] Optionally, the method further includes:

[0057] When the diagnosis trigger instruction is in the second state, determining that the original signal is the signal to be processed;

[0058] The signal to be processed is input into the main functional circuit to obtain a processed output signal.

[0059] In an embodiment of the present application, the signal chain diagnostic system includes a diagnostic execution module, a main function circuit, a control module, and a verification module. After receiving the diagnostic trigger instruction provided by the control module, the diagnostic execution module can generate a first recombinant signal and / or a second recombinant signal according to the signal to be processed, and transmit it to the main function circuit. The diagnostic signal output after processing by the main function circuit will be further transmitted to the verification module, which will analyze and compare it to determine whether the signal chain is working normally, so that the system can realize online fault detection in the working state, and can identify faults without suspending system operation, thereby improving diagnostic efficiency.

[0060] In addition, the system is highly flexible and adaptable. The diagnostic trigger instructions and verification trigger instructions provided by the control module enable the system to adapt to different operating modes. In the diagnostic mode, the diagnostic execution module can generate a reorganized signal so that the main functional circuit can test the operating status of each part of the signal chain. At the same time, it cooperates with the verification module to analyze the output signal of the main functional circuit to ensure the integrity of the signal chain and the accuracy of the signal diagnosis. And, in the normal working mode, the diagnostic execution module directly transmits the signal to be processed, so that the main functional circuit operates according to the expected function, thereby realizing the reuse of the main functional circuit without adding other structures.

[0061] Through the collaborative work of various structures in the signal chain diagnostic system, the diagnostic coverage of the signal chain can be improved, and real-time online diagnosis of the signal chain, signal integrity assurance and system flexibility improvement can be achieved, thereby enhancing the reliability and maintainability of the system.

[0062] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0064] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0065] Figure 1 A first schematic diagram of the architecture of a signal chain diagnostic system provided by a specific embodiment of the present disclosure;

[0066] Figure 2 A second schematic diagram of the architecture of a signal chain diagnostic system provided by a specific embodiment of the present disclosure;

[0067] Figure 3 A third schematic diagram of the architecture of a signal chain diagnostic system provided by a specific embodiment of the present disclosure;

[0068] Figure 4 A schematic diagram of the architecture of another signal chain diagnostic system provided by a specific embodiment of the present disclosure;

[0069] Figure 5 A schematic diagram of the architecture of another signal chain diagnostic system provided by a specific embodiment of the present disclosure;

[0070] Figure 6 A first flow chart corresponding to the signal chain diagnostic method provided in a specific embodiment of the present disclosure;

[0071] Figure 7 A second flow chart corresponding to the signal chain diagnostic method provided in a specific embodiment of the present disclosure;

[0072] Figure 8 A third flow chart corresponding to the signal chain diagnostic method provided in a specific embodiment of the present disclosure;

[0073] Figure 9 This is a fourth flow chart corresponding to the signal chain diagnostic method provided in a specific embodiment of the present disclosure.

[0074] Description of reference numerals:

[0075] 10-diagnosis execution module;

[0076] 20-main function circuit, 21-analog front end, 22-analog-to-digital converter, 23-digital processor;

[0077] 30-control module;

[0078] 40- verification module;

[0079] 50-Signal acquisition module;

[0080] 60-Graphic Generator. DETAILED DESCRIPTION

[0081] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the embodiments described are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0082] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0083] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0084] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0085] The term "and / or" as used herein describes an association relationship between associated objects, indicating that three relationships can exist. For example, "A and / or B" can represent the existence of A alone, the simultaneous existence of A and B, and the existence of B alone. Furthermore, the term "at least one" as used herein refers to any combination of at least two of any one or more of a plurality of items. For example, "at least one of A, B, and C" can represent any one or more elements selected from the set consisting of A, B, and C.

[0086] In addition, numerous specific details are provided in the following detailed description to better illustrate the present disclosure. Those skilled in the art will appreciate that the present disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main points of the present disclosure.

[0087] Figure 1 A first schematic diagram of the signal chain diagnostic system provided in a specific embodiment of the present disclosure is shown in FIG. Figure 1 As shown, a signal chain diagnostic system includes:

[0088] The diagnosis execution module 10 has an input terminal, a first output terminal and a control terminal, wherein the input terminal receives a signal to be processed, and the control terminal receives a diagnosis trigger instruction;

[0089] The main function circuit 20 has an input terminal and an output terminal, wherein the input terminal is coupled to the first output terminal of the diagnosis execution module 10, and the output terminal provides a diagnosis output signal;

[0090] The control module 30 has a first output terminal and a second output terminal, wherein the first output terminal provides a diagnosis trigger instruction and the second output terminal provides a verification trigger instruction; the control module 30 periodically generates the diagnosis trigger instruction and the verification trigger instruction;

[0091] The verification module 40 has a first input terminal and a second input terminal, wherein the first input terminal receives a verification trigger instruction, and the second input terminal receives a diagnostic output signal;

[0092] The diagnosis execution module 10 generates a first recombined signal and / or a second recombined signal according to the signal to be processed in response to the diagnosis trigger instruction; or,

[0093] The diagnosis execution module 10 transmits a signal to be processed to the main function circuit 20 in response to the diagnosis trigger instruction.

[0094] Optionally, the signal chain diagnostic system may include a diagnostic execution module 10, a main function circuit 20 coupled to the diagnostic execution module 10, a verification module 40 connected to the main function circuit 20, and a control module 30 respectively connected to the verification module 40 and the diagnostic execution module 10.

[0095] Specifically, the control module 30 is configured to send a diagnostic execution instruction to the diagnostic instruction module to switch the operating mode of the signal chain diagnostic system. Furthermore, the control module 30 is configured to send a verification trigger instruction to the verification module 40 to enable the verification module 40 to verify the signal. The configuration of the control module 30 enables the signal chain diagnostic system to detect signal chain faults without interrupting normal operation, thereby improving system reliability and the efficiency and convenience of signal chain fault detection.

[0096] In addition, the control module 30 can periodically generate diagnostic trigger instructions and verification trigger instructions. It can also be considered that the verification trigger instructions are periodically generated. The diagnostic trigger instructions are always generated, but the diagnostic trigger instructions corresponding to the first state, i.e., the diagnostic working mode, are periodically generated and generated synchronously with the verification trigger instructions. The periodic generation of the diagnostic trigger instructions and verification trigger instructions of the first state can enable the signal chain diagnostic system to perform signal chain function detection according to the preset period, thereby discovering potential faults in advance, avoiding sudden system failures due to signal anomalies, and improving the safety, reliability and real-time performance of the signal chain function detection. Among them, the preset period can be set according to the specific application scenario of the signal chain diagnostic system so that the preset period can match the specific application requirements.

[0097] The diagnostic execution module 10 is configured to receive a diagnostic trigger instruction and switch to a corresponding operating mode based on the diagnostic trigger instruction. Furthermore, the diagnostic execution module 10 is configured to receive a signal to be processed and, depending on the operating mode, transmit the signal to be processed to the main function circuit 20 or reorganize the signal to be processed to obtain a reorganized signal, which is then transmitted to the main function circuit 20. The reorganized signal can be divided into a first reorganized signal and a second reorganized signal based on the architecture of different signal chain diagnostic systems. In this embodiment, the diagnostic execution module 10 transmits the first reorganized signal to the main function circuit 20.

[0098] The main function circuit 20 is used to process the signal to be processed in the normal working mode; or, the main function circuit 20 is used to process the recombined signal in the diagnostic working mode and transmit the processed signal, namely the diagnostic output signal, to the verification module 40.

[0099] The verification module 40 is used to receive a verification trigger instruction to verify the signal chain function in combination with the diagnostic output signal. In addition, the verification module 40 is also used to store a preset standard signal, which serves as a reference value for the signal chain function detection and can be used in conjunction with the diagnostic output signal to verify the signal chain function. The preset standard signal can be obtained based on user input, or it can be updated and determined during the execution of the work by the signal chain diagnostic system. The preset standard signal can be divided into a first preset standard signal and a second preset standard signal. In this embodiment, the preset standard signal is the first preset standard signal.

[0100] In a specific embodiment, the signal chain diagnostic system can correspond to different operating modes, such as a normal operating mode and a diagnostic operating mode, so that the main functional circuit 20 can be reused based on the system and online diagnosis can be completed without interrupting work. The diagnostic execution instruction can correspond to a first state and a second state, wherein the first state can correspond to the diagnostic operating mode and the second state can correspond to the normal operating mode.

[0101] Figure 2 A second schematic diagram of the signal chain diagnostic system provided in a specific embodiment of the present disclosure is shown in FIG. Figure 2 As shown, in this embodiment, the signal chain diagnostic system may further include:

[0102] The signal acquisition module 50 has an input end and an output end, wherein the input end receives the original signal and the output end provides the signal to be processed.

[0103] In a specific embodiment, a signal acquisition module 50 may be provided upstream of the input end of the diagnostic execution module 10. The signal acquisition module 50 may select different types of sensors or multi-sensor fusion structures according to different application scenarios of the signal chain diagnostic system, or may select other structures that can acquire and transmit signals.

[0104] Specifically, the signal acquisition module 50 can obtain the original signal generated, transmitted, and sent upstream, and can determine the signal to be processed from the original signal according to the working mode, application scenario, etc. of the signal chain diagnostic system, and send it to the diagnostic execution module 10.

[0105] Figure 3 A third schematic diagram of the signal chain diagnostic system provided in a specific embodiment of the present disclosure is shown in FIG. Figure 3 As shown, in this embodiment, the main function circuit 20 may include:

[0106] The analog front end 21 has an input terminal and an output terminal; wherein the input terminal receives at least one of the first recombined signal, the second recombined signal, or the signal to be processed, and the output terminal provides one of the first diagnostic signal, the third diagnostic signal, or the first processed signal;

[0107] an analog-to-digital converter 22 having an input terminal and an output terminal; wherein the input terminal receives one of the first diagnostic signal, the third diagnostic signal, or the first processed signal, and the output terminal provides one of the second diagnostic signal, the fourth diagnostic signal, or the second processed signal;

[0108] The digital processor 23 has an input terminal and an output terminal; wherein the input terminal receives one of the second diagnostic signal, the fourth diagnostic signal or the second processed signal, and the output terminal provides one of the diagnostic output signal or the processed output signal.

[0109] In a specific embodiment, the main function circuit 20 may include an analog front end 21, an analog-to-digital converter 22, and a digital processor 23 coupled in sequence. In this embodiment, the analog front end 21 is connected to the diagnosis execution module 10. When the operating mode is the normal operating mode, that is, the diagnosis execution instruction corresponds to the second state, the analog front end 21 receives the signal to be processed and outputs a first processing signal, the analog-to-digital converter 22 receives the first processing signal and outputs a second processing signal, and the digital processor 23 receives the second processing signal and outputs a diagnostic output signal.

[0110] When the working mode is the diagnostic working mode, that is, the diagnostic execution instruction corresponds to the first state, the analog front end 21 receives the first recombined signal and outputs a first diagnostic signal, the analog-to-digital converter 22 receives the first diagnostic signal and outputs a second diagnostic signal, and the digital processor 23 receives the second diagnostic signal and outputs a diagnostic output signal.

[0111] In the main function circuit 20, the signal received from the diagnostic execution module 10 passes through the analog front end 21 through amplification, filtering, offset correction and other functions, which can improve the signal quality, reduce high-frequency noise and offset error, and improve measurement accuracy; the optimized signal is then transmitted to the analog-to-digital converter 22 for conversion into a digital signal, which can improve signal stability, reduce signal distortion, and improve system robustness.

[0112] In addition, in the main functional circuit 20, the first diagnostic signal generated by the analog front end 21 and the second diagnostic signal generated by the analog-to-digital converter 22 can also be sent to the verification module 40 for signal verification. By comparing multiple diagnostic signals and setting different checkpoints, the reliability of fault detection can be improved, and various types of failures in the signal chain circuit can be efficiently identified.

[0113] In this embodiment, the signal chain diagnostic system can execute different working modes under the control of the control module 30. Specifically, when the diagnostic trigger instruction is in the first state:

[0114] The first output end of the diagnosis execution module 10 provides a first recombined signal; the input end of the analog front end 21 receives the first recombined signal, and the output end of the analog front end 21 provides a first diagnostic signal; the input end of the analog-to-digital converter 22 receives the first diagnostic signal, and the output end of the analog-to-digital converter 22 provides a second diagnostic signal; the input end of the digital processor 23 receives the second diagnostic signal, and the output end of the digital processor 23 provides a diagnostic output signal; the verification module 40 responds to the verification trigger instruction, compares the diagnostic output signal with the first preset standard signal, and determines the diagnostic verification result based on the comparison result.

[0115] Specifically, if the phase difference between the diagnostic output signal and the first preset standard signal is within the tolerance range, the signal chain is considered to have passed the diagnosis and can operate normally. If the phase difference between the two is not within the tolerance range, it indicates that there is a functional abnormality in the signal chain.

[0116] When the diagnostic trigger instruction is in the second state, the first output terminal of the diagnostic execution module 10 provides a signal to be processed, and the input terminal of the main function circuit 20 receives the signal to be processed. Specifically, in the main function circuit 20, the analog front end 21 receives the signal to be processed at its input terminal and provides a first processed signal at its output terminal; the analog-to-digital converter 22 receives the first processed signal at its input terminal and provides a second processed signal at its output terminal; and the digital processor 23 receives the second processed signal at its input terminal and provides a processed output signal at its output terminal.

[0117] Another signal chain diagnostic system according to an embodiment of the present application is as follows: Figure 4 As shown, there are multiple analog front ends 21 in the signal chain diagnostic system, and the number of analog-to-digital converters 22 is equal to the number of analog front ends 21 , and the analog-to-digital converters 22 correspond one to one to the analog front ends 21 .

[0118] In the signal chain diagnostic system disclosed in this application, the number of analog front ends 21 can be either one or multiple. When there is one analog front end 21, it corresponds to the system architecture of the signal chain diagnostic system described in the previous embodiment; when there are multiple analog front ends 21, it corresponds to the system architecture of the signal chain diagnostic system of this embodiment. In this embodiment, two analog front ends 21 are used as an example to illustrate the signal chain diagnostic system.

[0119] In this embodiment, the signal chain diagnostic system includes a signal acquisition module 50, a diagnostic execution module 10, a main functional circuit 20, a control module 30, and a verification module 40. The connections and functions of these components remain unchanged; only the internal structure of the main functional circuit 20 changes. Simultaneously, the signal transmission between the signal acquisition module 50 and the diagnostic execution module 10 changes with the changes in the main functional circuit 20, and the verification method of the verification module 40 changes. The internal structure of the main functional circuit 20 and related changes will be described below; other components and their unchanged functions will not be further described in this embodiment.

[0120] Specifically, when there are two analog front ends 21, the diagnosis execution module 10 further has a second output terminal, and the first output terminal and the second output terminal of the diagnosis execution module 10 are coupled to the input terminals of the two analog front ends 21 respectively;

[0121] When the diagnosis trigger instruction is in the first state, the first output terminal of the diagnosis execution module 10 provides a first recombined signal, and the second output terminal of the diagnosis execution module 10 provides a second recombined signal;

[0122] An input terminal of one of the two analog front ends 21 receives the first recombined signal, and an output terminal provides a first diagnostic signal; an input terminal of the other analog front end 21 receives the second recombined signal, and an output terminal provides a third diagnostic signal;

[0123] One of the two analog-to-digital converters 22 receives a first diagnostic signal at its input and provides a second diagnostic signal at its output; the other of the two analog-to-digital converters 22 receives a third diagnostic signal at its input and provides a fourth diagnostic signal at its output.

[0124] An input terminal of the digital processor 23 receives the second diagnostic signal and the fourth diagnostic signal, and an output terminal thereof provides a diagnostic output signal.

[0125] In one specific embodiment, the number of analog front ends 21 and analog-to-digital converters 22 in the main function circuit 20 is the same, but there can always be only one digital processor 23. When there are two analog front ends 21, the signal chain diagnostic system does not need to use a preset standard signal for diagnosis and verification, but instead uses the same signal itself for self-verification. Therefore, to accommodate changes in the input terminal of the main function circuit 20, the signal acquisition module 50 adds an output terminal, and accordingly, the diagnostic execution module 10 also adds a second input terminal and a second output terminal.

[0126] In this embodiment, the recombined signal includes a first recombined signal and a second recombined signal corresponding to the two analog front ends 21. The diagnosis execution module 10 receives the signal to be processed from the signal acquisition module 50 via the first input terminal and the second input terminal, and provides the first recombined signal to one analog front end 21 via the first output terminal and provides the second recombined signal to the other analog front end 21 via the second output terminal.

[0127] In the main functional circuit 20, the analog front end 21, which receives the first recombined signal, provides a first diagnostic signal to the connected analog-to-digital converter 22, which in turn provides a second diagnostic signal to the digital processor 23. The analog front end 21, which receives the second recombined signal, provides a third diagnostic signal to the connected analog-to-digital converter 22, which in turn provides a fourth diagnostic signal to the digital processor 23. After receiving the second and fourth diagnostic signals, the digital processor 23 digitally processes them and sends them as diagnostic output signals to the verification module 40. In other words, the diagnostic output signals in this embodiment can be considered to include the processed second and fourth diagnostic signals. The verification module 40 compares the processed second and fourth diagnostic signals. If the difference between the two signals is within the tolerance range, the signal chain is considered to have passed the diagnosis and is functioning normally. If the difference between the two signals is outside the tolerance range, it indicates a functional malfunction in the signal chain. By configuring multiple analog front ends 21 and multiple analog-to-digital converters 22, the signal chain diagnostic system can self-check based on the received signals.

[0128] In addition, for the main functional circuit 20 of multiple analog front ends 21 and multiple analog-to-digital converters 22, there can also be at least one group of analog front ends 21 and analog-to-digital converters 22, and the processed diagnostic signals, i.e., the first diagnostic signal and the second diagnostic signal, or the third diagnostic signal and the fourth diagnostic signal in this embodiment, are sent to the verification module 40 for multi-node verification, which can also improve the reliability of fault detection and efficiently identify various types of failures in the signal chain circuit.

[0129] Another signal chain diagnostic system according to an embodiment of the present application is as follows: Figure 5 As shown, the signal chain diagnostic system also includes:

[0130] The pattern generator 60 has an input terminal and an output terminal; wherein the input terminal receives a diagnostic trigger instruction, and the output terminal provides a second preset standard signal;

[0131] An input terminal of the main function circuit 20 is coupled to an output terminal of the pattern generator 60 and receives the second predetermined standard signal.

[0132] In this embodiment, the signal chain diagnostic system includes a signal acquisition module 50, a pattern generator 60, a main functional circuit 20, a control module 30, and a verification module 40. The functions and internal components of each structure remain unchanged. The following describes the newly added pattern generator 60 and related changes. Other structures and their unchanged functions are not further described in this embodiment.

[0133] In a specific embodiment, the input end of the pattern generator 60 can receive a diagnostic trigger instruction, and the output end is coupled to the main function circuit 20 and provides a second preset standard signal to the analog front end 21 of the main function circuit 20. Figure 5 A switch is also provided between the signal acquisition module 50 and the pattern generator 60, so that the control module 30 can switch the operating mode of the signal chain diagnostic system by controlling the pattern generator 60 and the closure of the switch. Specifically, when the diagnostic trigger instruction is in the first state, that is, the signal chain diagnostic system is executing the diagnostic operating mode, the switch is open, and the signal received by the main function circuit 20 is the second preset standard signal provided by the pattern generator 60. When the diagnostic trigger instruction is in the second state, that is, the signal chain diagnostic system is executing the normal operating mode, the switch is closed, and the signal received by the main function circuit 20 is the signal to be processed provided by the signal acquisition module 50, and the pattern generator 60 does not generate or provide the second preset standard signal to the main function circuit 20.

[0134] In this embodiment, when the diagnostic trigger instruction is in the first state, the output end of the pattern generator 60 provides a second preset standard signal; 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 diagnostic signal; the input end of the analog-to-digital converter 22 receives the fifth diagnostic signal, and the output end of the analog-to-digital converter 22 provides a sixth diagnostic signal; the input end of the digital processor 23 receives the sixth diagnostic signal, and the output end of the digital processor 23 provides a diagnostic output signal.

[0135] Specifically, the graphic generator 60 can generate a second preset standard signal in response to the diagnostic execution instruction corresponding to the first state issued by the control module 30, transmit the second preset standard signal to the main function circuit 20 to obtain the corresponding diagnostic output signal, and use the expected processing result corresponding to the second preset standard signal as a reference value to compare with the diagnostic output signal. If the expected processing result and the diagnostic output signal are within the tolerance range, it is considered that the signal chain diagnosis has passed and can perform normally. If the difference between the two is not within the tolerance range, it means that there is a functional abnormality in the signal chain. The signal chain diagnostic system of this architecture processes the reference signal and determines whether there is a functional abnormality by judging the difference between the expected processing result and the diagnostic output signal. It can ensure the controllability of the test signal and avoid misjudgment caused by input signal fluctuations. At the same time, it makes the diagnostic method of the signal chain standardized and repeatable, ensuring the reliability of the diagnostic results.

[0136] In addition, in the main functional circuit 20, the analog front end 21 and the analog-to-digital converter 22 can also send their processed diagnostic signals, namely the fifth diagnostic signal and the sixth diagnostic signal in this embodiment, to the verification module 40 for multi-node verification, which can also improve the reliability of fault detection and efficiently identify various types of failures in the signal chain circuit.

[0137] Correspondingly, the present application also discloses a signal chain diagnosis method, which is applied to the signal chain diagnosis system of any of the above embodiments, such as Figure 6 As shown, a signal chain diagnostic method includes:

[0138] S101: Acquire a diagnosis trigger instruction and an original signal; the original signal includes at least any one of a signal to be diagnosed, a signal to be processed, and a second preset standard signal;

[0139] Specifically, when the diagnosis trigger instruction and the original signal are obtained, since the signal chain diagnosis system corresponds to two different working modes, it is necessary to first determine the working mode corresponding to the diagnosis trigger instruction.

[0140] S102: when the diagnosis trigger instruction is in the first state and the original signal is a signal to be diagnosed, obtaining a first reconstructed signal according to the signal to be diagnosed;

[0141] S103: Inputting the first recombined signal into the main function circuit to generate a first diagnostic output signal;

[0142] S104: Determine a signal verification result according to the first diagnostic output signal and the first preset standard signal.

[0143] Specifically, after determining the working mode and the specific signal, step S102-step S103 corresponds to the first of the previous embodiments of this application, that is, the signal chain diagnostic system includes a signal acquisition module, a diagnostic execution module, a main function circuit, a verification module and a control module, and the main function circuit includes an analog front end, an analog-to-digital converter and a digital processor.

[0144] At this point, the signal chain diagnostic system executes a diagnostic operating mode and uses the first preset standard signal to test the signal chain's functionality. The signal verification result can be determined based on whether the difference between the diagnostic output signal and the first preset standard signal is within a tolerance range. For example, if the difference is within the tolerance range, the signal verification result may indicate a pass, indicating normal functionality. If the difference is not within the tolerance range, the signal verification result may indicate a fail, indicating a possible functional anomaly.

[0145] Another signal chain diagnosis method according to an embodiment of the present application is as follows: Figure 7 As shown, the signal chain diagnostics method also includes:

[0146] S201: when the diagnosis trigger instruction is in the first state and the original signal is a signal to be diagnosed, obtaining a second reconstructed signal according to the signal to be diagnosed;

[0147] S202: Inputting the second recombined signal into the main function circuit to generate a second diagnostic output signal;

[0148] S203: Determine a signal verification result according to the first diagnostic output signal and the second diagnostic output signal.

[0149] Specifically, steps S201 to S203 correspond to the second embodiment of the preceding embodiment of this application, namely, the signal chain diagnostic system includes a signal acquisition module, a diagnostic execution module, a main functional circuit, a verification module, and a control module, and the main functional circuit includes two analog front ends, two analog-to-digital converters, and a digital processor. At this time, the signal chain diagnostic system executes a diagnostic operating mode and performs self-verification based on the first recombined signal and the second recombined signal generated by the signal to be processed. The determination of the signal verification result is not further described here.

[0150] Another signal chain diagnosis method according to an embodiment of the present application is as follows: Figure 8 As shown, the signal chain diagnostics method also includes:

[0151] S301: When the diagnosis trigger instruction is in the first state and the original signal is the second preset standard signal, input the second preset standard signal into the main function circuit to generate a third diagnosis output signal;

[0152] S302: Calculating a standard output signal based on a second preset standard signal;

[0153] S303: Determine a signal verification result according to the third diagnostic output signal and the standard output signal.

[0154] Specifically, steps S301 to S303 correspond to the third embodiment of the preceding embodiment of this application, namely, the signal chain diagnostic system includes a signal acquisition module, a pattern generator, a main functional circuit, a verification module, and a control module, and the main functional circuit includes an analog front end, an analog-to-digital converter, and a digital processor. At this time, the signal chain diagnostic system executes a diagnostic working mode and performs signal chain function detection based on a second preset standard signal. The determination of the signal verification result is not further described here.

[0155] Another signal chain diagnosis method according to an embodiment of the present application is as follows: Figure 9 As shown, the signal chain diagnostics method also includes:

[0156] S401: When the diagnosis trigger instruction is in the second state, determining that the original signal is a signal to be processed;

[0157] S402: Input the signal to be processed into the main functional circuit to obtain a processed output signal.

[0158] Specifically, steps S401 and S402 can correspond to any one of the three architectures of the above-mentioned signal chain diagnostic system. At this time, the signal chain diagnostic system executes the normal working mode, receives the signal to be processed, processes it through the main functional circuit, and uses it as the output processing signal and sends it to the downstream receiving end.

[0159] For the first two signal chain diagnostic systems that include a diagnostic execution module, when the signal chain diagnostic system operates in normal operating mode, the diagnostic execution module acts as a transmission bridge and does not perform signal reassembly, transmitting the received signal to the main functional circuit. For signal chain diagnostic systems that do not include a diagnostic execution module but include a pattern generator, when the signal chain diagnostic system operates in normal operating mode, the switch between the signal acquisition module and the pattern generator is closed, and the pattern generator is in an inoperative state.

[0160] The above-mentioned signal chain diagnostic method, in conjunction with the signal chain diagnostic system, can reduce power consumption, improve diagnostic coverage, diagnostic efficiency and diagnostic reliability while minimizing the increase in the area occupied by the system inside the device.

[0161] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0162] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0163] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0164] The above are only preferred embodiments of the present application and are not intended to limit the present application in any form. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application shall still fall within the scope of the technical solution of the present application. The selection of terms used in this article is intended to best explain the principles, practical applications, or technical improvements of each embodiment in the market, or to enable other ordinary technicians in this technical field to understand the embodiments disclosed herein.

Claims

1. A signal chain diagnostic system, characterized in that: The system comprises: A diagnosis execution module (10) has an input terminal, a first output terminal and a control terminal, wherein the input terminal receives a signal to be processed and the control terminal receives a diagnosis trigger instruction; A main function circuit (20) has an input terminal and an output terminal, wherein the input terminal is coupled to the first output terminal of the diagnosis execution module (10), and the output terminal provides a diagnosis output signal; A control module (30) having a first output terminal and a second output terminal, wherein the first output terminal provides the diagnosis trigger instruction and the second output terminal provides the verification trigger instruction; A verification module (40) has a first input terminal and a second input terminal, wherein the first input terminal receives the verification trigger instruction and the second input terminal receives the diagnostic output signal; The diagnosis execution module (10) generates a first recombined signal and / or a second recombined signal according to the signal to be processed in response to the diagnosis trigger instruction; or The diagnosis execution module (10) transmits the signal to be processed to the main function circuit (20) in response to the diagnosis trigger instruction.

2. The signal chain diagnostic system according to claim 1, wherein: The control module (30) periodically generates the diagnosis trigger instruction and the verification trigger instruction.

3. The signal chain diagnostic system according to claim 1, wherein: The system further comprises: The signal acquisition module (50) has an input end and an output end, wherein the input end receives the original signal and the output end provides a signal to be processed.

4. The signal chain diagnostic system according to claim 1, wherein: The main functional circuit (20) comprises: An analog front end (21) has an input end and an output end; wherein the input end receives at least one of the first recombined signal, the second recombined signal or the signal to be processed, and the output end provides one of the first diagnostic signal, the third diagnostic signal or the first processed signal; an analog-to-digital converter (22) having an input terminal and an output terminal; wherein the input terminal receives one of the first diagnostic signal, the third diagnostic signal, or the first processed signal, and the output terminal provides one of the second diagnostic signal, the fourth diagnostic signal, or the second processed signal; A digital processor (23) has an input terminal and an output terminal; wherein the input terminal receives one of the second diagnostic signal, the fourth diagnostic signal or the second processed signal, and the output terminal provides one of the diagnostic output signal or the processed output signal.

5. The signal chain diagnostic system according to claim 4, wherein: When the diagnosis trigger instruction is in a first state, the first output terminal of the diagnosis execution module (10) provides a first recombined signal; The input end of the analog front end (21) receives the first recombined signal, and the output end of the analog front end (21) provides a first diagnostic signal; The input end of the analog-to-digital converter (22) receives the first diagnostic signal, and the output end of the analog-to-digital converter (22) provides the second diagnostic signal; The input end of the digital processor (23) receives the second diagnostic signal, and the output end of the digital processor (23) provides the diagnostic output signal; The verification module (40) responds to the verification trigger instruction, compares the diagnostic output signal with a first preset standard signal, and determines a diagnostic verification result according to the comparison result.

6. The signal chain diagnostic system according to claim 4, characterized in that: The number of the analog front end (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) correspond one-to-one to the analog front ends (21).

7. The signal chain diagnostic system according to claim 6, wherein: When the number of the analog front ends (21) is two, the diagnosis execution module (10) further has a second output terminal, and the first output terminal and the second output terminal of the diagnosis execution module (10) are respectively coupled to the input terminals of the two analog front ends (21); When the diagnosis trigger instruction is in a first state, the first output end of the diagnosis execution module (10) provides the first recombined signal, and the second output end of the diagnosis execution module (10) provides the second recombined signal; An input end of one of the two analog front ends (21) receives the first recombined signal, and an output end provides the first diagnostic signal; an input end of the other of the two analog front ends (21) receives the second recombined signal, and an output end provides a third diagnostic signal; An input end of one of the two analog-to-digital converters (22) receives the first diagnostic signal, and an output end provides the second diagnostic signal; an input end of the other of the two analog-to-digital converters (22) receives the third diagnostic signal, and an output end provides a fourth diagnostic signal; The digital processor (23) receives the second diagnostic signal and the fourth diagnostic signal at its input terminal, and provides the diagnostic output signal at its output terminal.

8. The signal chain diagnostic system according to claim 4, wherein: The system further comprises: A pattern generator (60) has an input end and an output end; wherein the input end receives the diagnostic trigger instruction, and the output end provides a second preset standard signal; The input end of the main function circuit (20) is coupled to the output end of the pattern generator (60) and receives the second preset standard signal.

9. The signal chain diagnostic system according to claim 8, characterized in that: When the diagnosis trigger instruction is in the first state, the output end of the pattern generator (60) provides a second preset standard signal; 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 diagnostic signal; The input end of the analog-to-digital converter (22) receives the fifth diagnostic signal, and the output end of the analog-to-digital converter (22) provides a sixth diagnostic signal; An input terminal of the digital processor (23) receives the sixth diagnostic signal, and an output terminal of the digital processor (23) provides the diagnostic output signal.

10. The signal chain diagnostic system according to claim 4, wherein: When the diagnosis trigger instruction is in the second state, the first output end of the diagnosis execution module (10) provides the signal to be processed, and the input end of the main function circuit (20) receives the signal to be processed.

11. The signal chain diagnostic system according to claim 10, wherein: The analog front end (21) receives the signal to be processed at its input end and provides a first processed signal at its output end; The analog-to-digital converter (22) receives the first processed signal at its input and provides a second processed signal at its output; The digital processor (23) receives the second processed signal at its input terminal and provides the processed output signal at its output terminal.

12. A signal chain diagnostic method, applied to the signal chain diagnostic system according to any one of claims 1 to 11, characterized in that: The method comprises: Obtaining a diagnosis trigger instruction and an original signal; the original signal includes at least any one of a signal to be diagnosed, a signal to be processed, and a second preset standard signal; When the diagnosis trigger instruction is in the first state and the original signal is the signal to be diagnosed, obtaining a first recombined signal according to the signal to be diagnosed; inputting the first recombined signal into a main function circuit to generate a first diagnostic output signal; A signal verification result is determined according to the first diagnostic output signal and a first preset standard signal.

13. The signal chain diagnosis method according to claim 12, wherein: The method further comprises: When the diagnosis trigger instruction is in the first state and the original signal is the signal to be diagnosed, obtaining a second recombined signal according to the signal to be diagnosed; inputting the second recombined signal into the main function circuit to generate a second diagnostic output signal; The signal verification result is determined according to the first diagnostic output signal and the second diagnostic output signal.

14. The signal chain diagnosis method according to claim 12, wherein: The method further comprises: When the diagnosis trigger instruction is in the first state and the original signal is the second preset standard signal, the second preset standard signal is input into the main function circuit to generate a third diagnosis output signal; Calculating a standard output signal based on the second preset standard signal; The signal verification result is determined according to the third diagnostic output signal and the standard output signal.

15. The signal chain diagnosis method according to claim 12, wherein: The method further comprises: When the diagnosis trigger instruction is in the second state, determining that the original signal is the signal to be processed; The signal to be processed is input into the main functional circuit to obtain a processed output signal.

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