Configuration device for signal processing interface circuit and vehicle controller

Abstract

This invention provides a configuration device for a signal processing interface circuit and a vehicle controller, relating to the field of signal processing technology. By pre-setting at least two sets of redundant configuration branches in the preset signal processing interface circuit, and cooperating with the main control module and execution module of the configuration device to determine the target fuse branch, the fuserable components of the branch to be discarded can be accurately fused according to the electrical requirements of external related components before the controller is off the production line. Without redesigning the hardware interface circuit, the same hardware port can be adapted to related components with different electrical characteristics, which can effectively improve the flexibility of interface configuration, shorten the controller interface matching and vehicle development cycle, and reduce R&D and manufacturing costs.

Description

Technical Field

[0001] This invention relates to the field of signal processing technology, and in particular to a configuration device for a signal processing interface circuit and a vehicle controller. Background Technology

[0002] With the development of the automotive industry, automotive controllers are gradually evolving towards integration and multi-functionality. Simultaneously, in the fields of supply chain management and product development, OEMs are generally promoting the "three-pronged" approach of platformization, standardization, and universalization to improve development efficiency, ensure product quality, and reduce R&D and manufacturing costs. To adapt to these trends, the same controller hardware is often programmed with different versions of software to suit the application needs of different vehicle models and configurations. However, due to the differences in the electrical characteristics of external components, this approach places higher demands on the controller's hardware interface circuitry, particularly in the field of analog signal processing interfaces.

[0003] In existing technologies, the electrical characteristics of the controller's analog signal processing interface (such as pull-up / pull-down resistor configuration, EMC filter capacitor capacity, etc.) are fixed after the hardware is manufactured and cannot be dynamically changed. When the matched external components are replaced, causing changes in the interface's electrical requirements (for example, the interface needs to be switched from a pull-up configuration to a pull-down configuration, or the EMC capacitor capacity needs to be adjusted), the original interface will not be able to meet the new adaptation requirements. This necessitates coordinating other hardware resources or redesigning the hardware interface circuit, thereby extending the controller interface matching cycle and the vehicle development cycle, and increasing R&D and manufacturing costs. Summary of the Invention

[0004] The purpose of this invention is to provide a configuration device for a signal processing interface circuit and a vehicle controller. Before the controller is put into use, the configuration device can perform fuse-on processing on the unused branch according to the interface requirements of the external components. This enables the same hardware port to adapt to components with different electrical characteristics, improves the configuration flexibility of the hardware interface, avoids the repeated design of hardware interface circuits, and effectively shortens the controller interface matching and vehicle development cycle.

[0005] In a first aspect, the present invention provides a configuration device for a signal processing interface circuit, wherein the device includes: a main control module, configured to acquire electrical configuration requirements of external associated components of the signal processing interface circuit, and generate circuit configuration instructions according to the electrical configuration requirements; wherein the signal processing interface circuit includes at least two sets of redundant configuration branches, and a common signal link connected to a common sampling terminal of each redundant configuration branch; and an execution module, configured to determine a target fuse branch from the redundant configuration branches according to the circuit configuration instructions, and perform fuse breaking processing on the target fuse branch through the common signal link, so as to adapt the signal processing interface circuit to the electrical configuration requirements of the external associated components.

[0006] In conjunction with the first aspect, the present invention also provides a first implementation of the first aspect, wherein each group of redundant configuration branches includes a fusible switch element and an interface circuit element, the fusible switch element being connected in series between the interface circuit element and the reference potential of the corresponding branch; the execution module includes: a reference selection module, used to determine a target fusible branch from multiple redundant configuration branches of the signal interface circuit according to the circuit configuration instruction, and to form a fusing current path for the target fusible branch; and a signal processing module, used to generate a fusing drive signal according to the circuit configuration instruction, and to input the fusing drive signal to a common signal link, so as to fuse the fusible switch element of the target fusible branch through the fusing current path.

[0007] In conjunction with the first aspect, the present invention also provides a second implementation of the first aspect, wherein the reference selection module includes a reference potential selection unit; the reference potential selection unit is used to connect the signal loop of the signal processing module to the reference potential corresponding to the target fuse branch according to the circuit configuration instruction, so as to form a directional fuse current loop that flows only through the target fuse branch.

[0008] In conjunction with the first aspect, the present invention also provides a third implementation of the first aspect, wherein the reference potential selection unit is a single-pole double-throw switch structure, used to switch conduction between high-level reference potentials and low-level reference potentials corresponding to at least two sets of redundant configuration branches.

[0009] In conjunction with the first aspect, the present invention also provides a fourth implementation of the first aspect, wherein the signal processing module includes a function generation unit and a power amplification unit; the function generation unit is used to generate a modulation signal of a specific frequency according to circuit configuration instructions; the power amplification unit is used to amplify the power of the modulation signal to generate a fuse drive signal.

[0010] In conjunction with the first aspect, the present invention also provides a fifth implementation of the first aspect, wherein the signal processing module further includes a bias unit; the bias unit is used to adjust the reference level of the fuse drive signal according to the circuit configuration instruction.

[0011] In conjunction with the first aspect, the present invention also provides a sixth implementation of the first aspect, wherein the device further includes a status feedback module, the status feedback module being connected to the main control module and the common signal link; the status feedback module is used to collect signal status information of the common signal link and feed it back to the main control module so that the main control module can confirm whether the target fuse branch has been blown.

[0012] In conjunction with the first aspect, the present invention also provides a seventh implementation of the first aspect, wherein the state feedback module is a peak capture module, used to detect the peak value of the fuse drive signal of the execution module and the load impedance change of the signal processing interface circuit.

[0013] In conjunction with the first aspect, the present invention also provides an eighth embodiment of the first aspect, wherein the device is integrated into a pre-set production line automation equipment for configuring the electrical characteristics of the signal processing interface circuit before the product leaves the factory.

[0014] Secondly, embodiments of the present invention also provide a vehicle controller, wherein the signal processing interface circuit of the vehicle controller includes at least two sets of redundant configuration branches and a common signal link connected to a common sampling terminal of each redundant configuration branch; wherein the execution module of the device in any of the above embodiments is connected to the common signal link to perform fuse-breaking processing on the target fuse-breaking branch in the at least two sets of redundant configuration branches.

[0015] The embodiments of the present invention bring the following beneficial effects: The embodiments of the present invention provide a configuration device for a signal processing interface circuit and a vehicle controller. By pre-setting at least two sets of redundant configuration branches in the preset signal processing interface circuit, and cooperating with the main control module and execution module of the configuration device to determine the target fuse branch, the fuserable components of the branch to be discarded can be accurately fused according to the electrical requirements of the external related components before the controller is launched. Without redesigning the hardware interface circuit, the same hardware port can be adapted to related components with different electrical characteristics, which effectively improves the flexibility of interface configuration, shortens the controller interface matching and vehicle development cycle, and reduces R&D and manufacturing costs.

[0016] Other features and advantages of the invention will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the techniques described above.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a configuration device for a signal processing interface circuit provided in an embodiment of the present invention; Figure 2 A circuit diagram of a signal processing interface circuit provided in an embodiment of the present invention; Figure 3A schematic diagram of the configuration device for another signal processing interface circuit provided in an embodiment of the present invention; Figure 4 This is a schematic diagram showing the connection between a signal processing interface circuit and a configuration device provided in an embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] To facilitate understanding, a configuration device for a signal processing interface circuit provided in an embodiment of the present invention will first be described. (Refer to...) Figure 1The configuration device includes a main control module 10 and an execution module 20. The main control module is used to acquire the electrical configuration requirements of the external associated components of the signal processing interface circuit and generate circuit configuration instructions based on the electrical configuration requirements. The signal processing interface circuit includes at least two sets of redundant configuration branches and a common signal link connected to the common sampling terminal of each redundant configuration branch. The execution module is used to determine the target fuse branch from the redundant configuration branches according to the circuit configuration instructions, and perform fuse-breaking processing on the target fuse branch through the common signal link, so that the signal processing interface circuit adapts to the electrical configuration requirements of the external associated components. The main control module is the core control hub and can use devices with data processing, instruction generation, and module coordination capabilities, such as microcontrollers and MCUs (microcontroller units). The external associated components of the signal processing interface circuit include sensors, actuators, communication modules, etc., and the corresponding electrical configuration requirements include, but are not limited to, key electrical indicators such as the operating voltage, signal type, interface level, and impedance parameters of the external associated components. To address the electrical configuration requirements of the aforementioned external components, the main control module can acquire data through preset configuration interfaces, communication protocols, or external inputs. This includes acquiring target pull-up / pull-down resistor values, EMC capacitor values, interface level requirements, input impedance matching requirements, and signal sampling parameters. Furthermore, through internal logic operations, it can filter out redundant configuration branches in the signal processing interface circuit that need to be retained (branches with parameter matching requirements) and target fuse branches that need to be blown (branches with parameter mismatch requirements), and generate corresponding circuit configuration instructions. In one implementation, the circuit configuration command may specify only the branch identifiers to be retained (e.g., only issuing "redundant branch numbers / identifiers to be retained" to the two modules, such as "retain pull-up branch 1, pull-down branch 2"), without directly marking the branches to be blown; or, it may be a configuration command based on parameter combinations (e.g., issued in the form of "target electrical parameter combinations" (e.g., "pull-up resistor 10kΩ + EMC capacitor 100pF"), without directly specifying the branch numbers); or it may be a timing command executed in steps, such as a command split into two steps: "path selection command" and "drive command". First, the "path selection command" is issued, only informing the reference selection module to construct the target current path; after the path is constructed, the "drive command" is issued, informing the signal processing module to output the fuse signal. Alternatively, it may be a batch configuration command, which may contain multiple sets of target fuse branch identifiers, supporting the simultaneous blowing of multiple redundant branches. It should be noted that, regardless of the instruction form used, the goal is to transform the electrical configuration requirements of external components into control logic that can be executed by the reference selection module and the signal processing module. Ultimately, by selectively blowing redundant branches, the interface circuit retains the required combination of electrical parameters.

[0023] Furthermore, the aforementioned circuit configuration instructions are synchronously sent to the execution module. The execution module can apply a matching fuse-breaking electrical signal to the corresponding target fuse-breaking branch through the common signal link, so that the fusible switching element in the target fuse-breaking branch generates sufficient heat under the action of the electrical signal and achieves fuse breaking, thereby completing the configuration of the target fuse-breaking branch without affecting other redundant configuration branches.

[0024] In one implementation, the execution module includes a reference selection module, used to determine a target fusing branch from redundant configuration branches according to circuit configuration instructions, and to form a fusing current path for the target fusing branch. The signal processing module is used to generate a fusing drive signal according to the circuit configuration instructions and input the fusing drive signal to a common signal link to fuse the fusible switching element of the target fusing branch through the fusing current path. In a specific implementation, the reference selection module can use an internal gating action to connect the target fusing branch to the fusing drive circuit, establishing a dedicated and complete current conduction path for it, i.e., forming a fusing current path. This ensures that subsequent fusing drive signals flow only through the target fusing branch and not through other redundant branches that do not need fusing, thereby achieving precise gating and directional fusing, avoiding interference or false fusing of other branches. The signal processing module can generate a fusing drive signal with amplitude and drive capability that meet the fusing requirements according to the signal parameters carried in the circuit configuration instructions, and input the fusing drive signal to the common signal link. The fuse drive signal flows through the fuse current path pre-built by the reference selection module through the fusible switch element in the target fuse branch, so that the fusible switch element reliably melts under the action of the set electrical signal, thereby cutting off the redundant configuration branch that does not meet the electrical configuration requirements, and retaining only the redundant branch that matches the external related components, so as to realize the configuration of interface circuit parameters.

[0025] In conjunction with the above embodiments, the signal processing interface circuit of this invention adopts a redundant and configurable hardware architecture. Multiple selectable electrical adaptation branches are pre-set for the interface circuit. By permanently disconnecting a designated branch, the electrical topology of the circuit can be configured in one go to meet the electrical connection requirements of different external components. The signal processing interface circuit includes at least two sets of redundant configuration branches and a common signal link. Each set of redundant configuration branches includes a fusible switch element and an interface circuit element. The interface circuit element is used to provide electrical adaptation for the corresponding branch, enabling signal matching, level conversion, or impedance setting with external components. The fusible switch element is connected in series between the interface circuit element and the reference potential of the corresponding branch. In the unfuse state, it keeps the redundant branch normally conducting, enabling the branch to have the corresponding electrical function. When a sufficiently large fusing current is received, it can permanently fuse and disconnect, thereby disabling the redundant configuration branch and preventing it from participating in circuit operation. In one implementation, each set of redundant configuration branches provides different electrical adapter structures to correspond to different electrical configuration requirements (e.g., external components require different pull-up and pull-down resistor values, as well as different capacitor values; the redundant configuration branches include corresponding interface circuit elements). A common signal link is connected to the common sampling terminal of each redundant configuration branch, which can be used to realize the unified acquisition and transmission of sampling signals, and can also serve as a common injection path for fuse drive signals, providing a common port for the fuse configuration of multiple redundant branches.

[0026] Figure 2 This is a circuit diagram of a signal processing interface circuit provided in an embodiment of the present invention, with reference to... Figure 2 The diagram illustrates two sets of redundant configuration branches: Redundant Alternate Circuit 1 (Pull-up Branch): The interface circuit element consists of a pull-up resistor and EMC capacitor 1, and the fusible switch element is fuse 1, connected in series between the interface circuit element and the positive power supply reference potential Vdd. Redundant Alternate Circuit 2 (Pull-down Branch): The interface circuit element consists of a pull-down resistor and EMC capacitor 2, and the fusible switch element is fuse 2, connected in series between the interface circuit element and the ground reference potential (GND). The two branches provide different electrical adapter structures, corresponding to different pull-up / pull-down resistor and EMC capacitor configuration requirements.

[0027] Furthermore, the signal nodes of the two sets of redundant configuration branches are connected to the same signal sampling point. This sampling point is connected to the A / D sampling port through subsequent circuitry (series resistors and RC filter networks), forming a common signal link. This link is used to transmit external input signals to the A / D sampling terminal and also serves as a common injection channel for the fuse drive signal, providing a unified interface for the fuse-breaking operation of the two sets of redundant branches. Fuse 1 is connected in series between the pull-up resistor / EMC capacitor 1 and the positive power supply reference Vdd. When not blown, it keeps the pull-up branch conducting, providing pull-up electrical characteristics; after blowing, the pull-up branch is permanently disconnected and no longer participates in the circuit operation. Fuse 2 is connected in series between the pull-down resistor / EMC capacitor 2 and the ground reference GND. When not blown, it keeps the pull-down branch conducting, providing pull-down electrical characteristics; after blowing, the pull-down branch is permanently disconnected. By selectively blowing fuse 1 or fuse 2, the pull-up / pull-down resistor and EMC capacitor parameters of the interface circuit can be configured without modifying the hardware, allowing the interface circuit to adapt to the electrical requirements of different external components.

[0028] exist Figure 2Building upon this foundation, the number of redundant configuration branches can be expanded to achieve richer electrical adaptability, meeting the diverse needs of different external components. For example, for scenarios requiring different interface levels, input impedances, or signal driving capabilities from external components (such as 3.3V / 5V level switching, high impedance / low impedance input), multiple sets of pull-up redundant branches can be added: each set is configured with pull-up resistors of different values ​​(e.g., 1kΩ, 4.7kΩ, 10kΩ), connected in series with independent fuses, and connected to Vdd respectively. Similarly, multiple sets of pull-down redundant branches can be added: each set is configured with pull-down resistors of different values ​​(e.g., 1kΩ, 10kΩ, 47kΩ), connected in series with independent fuses, and connected to GND respectively. By blowing a specified fuse, the target pull-up / pull-down resistor value can be retained, achieving precise matching between interface impedance and level. For scenarios requiring different filtering bandwidths and anti-interference capabilities due to varying signal transmission rates of external components (e.g., low-speed sensors vs. high-speed communication modules), different EMC capacitor values ​​(e.g., 10pF, 100pF, 1nF) can be configured in parallel with corresponding resistors in each group of redundant pull-up / pull-down branches. For example, low-speed sensors require large capacitors to filter high-frequency noise, so large-capacitance branches can be retained; high-speed communication modules require small capacitors to ensure signal bandwidth, so small-capacitance branches can be retained. For scenarios requiring different interface types of external components (e.g., open-drain output, push-pull output, analog input) to adapt to different bias topologies, all pull-down branches can be fused, retaining the pull-up branch with the target resistance value to form a single pull-up bias. Alternatively, pull-up branches and some pull-down branches can be fused, retaining appropriate pull-down resistors to achieve bias voltage adjustment. Or, one set of pull-up and one set of pull-down branches can be retained simultaneously to form a voltage divider bias, achieving intermediate level configuration. For scenarios where external components require a pull-up resistor of a specific resistance value and a filter capacitor of a specific capacitance value (e.g., 4.7kΩ pull-up + 100pF filter), the "pull-up resistor of a specific resistance value + capacitor of a specific capacitance value" can be packaged into an independent redundant branch and connected in series with a dedicated fuse. Similarly, multiple parameter combinations such as "10kΩ pull-up + 1nF capacitor" and "47kΩ pull-down + 10pF capacitor" can be packaged into branches. By fusing other branches, the complete matching parameter combination can be directly retained. In summary, the embodiments of this invention encapsulate each electrical parameter combination of "resistor + capacitor" into an independent redundant configuration branch, and each branch achieves "selective permanent failure" through a series fuse. When not blown: the branch is conductive and participates in electrical adaptation. After blown: the branch is completely disconnected and no longer affects the electrical characteristics of the interface.

[0029] For newly added pull-up branches, multiple branches consisting of "fuse n + pull-up resistors of different values ​​+ EMC capacitors n of different values" can be connected in parallel between the common signal link and Vdd. For newly added pull-down branches, multiple branches consisting of "fuse m + pull-down resistors of different values ​​+ EMC capacitors m of different values" can be connected in parallel between the common signal link and GND. If a combination of "specific pull-up resistor + specific capacitor" is required, it can be directly packaged into a complete branch and connected in parallel between the common signal link and Vdd. If a combination of "specific pull-down resistor + specific capacitor" is required, it can be directly packaged into a complete branch and connected in parallel between the common signal link and GND. Either method can maintain the same topology, only adding parallel branches. In this way, the same hardware interface circuit can flexibly adapt to the complex electrical requirements of different external components such as level, impedance, and filtering by selectively fusing redundant branches without modifying the PCB or replacing components, greatly improving the interface's versatility and configuration flexibility.

[0030] Furthermore, the aforementioned signal processing module includes a function generation unit and a power amplification unit. The function generation unit is used to generate a modulation signal of a specific frequency according to the circuit configuration instructions; the power amplification unit is used to amplify the modulation signal to generate a fuse drive signal.

[0031] The specific frequency mentioned above can be predetermined by the fusing characteristics of the fusible switching element (fuse). This optimal operating frequency, tailored to the Joule heating effect of the fuse, avoids resonance interference with other system signals (such as A / D sampling and communication clocks). The power amplification unit amplifies the modulation signal output from the function generator, enhancing the signal drive capability and amplitude to generate a fusing drive signal that meets the corresponding fusing threshold requirements, ensuring reliable fusing of the fusible switching element. A suitable gain can be set according to the fusing current requirements of the fusible switching element, ensuring sufficient drive energy while avoiding device damage or signal crosstalk caused by overdrive.

[0032] Furthermore, the signal processing module also includes a bias unit, used to adjust the reference level of the fuse drive signal according to the circuit configuration instructions, so that the signal is adapted to the reference potential (Vdd or GND) of the target fuse branch, ensuring the formation of an effective fuse current loop. Specifically, if the target is a pull-up branch (reference potential is Vdd), the reference level of the fuse drive signal can be raised to near Vdd, so that an effective voltage difference is formed between the signal and Vdd, ensuring that the current flows through the fuse of the target pull-up branch; if the target is a pull-down branch (reference potential is GND), the reference level of the fuse drive signal can be pulled down to near GND, so that an effective voltage difference is formed between the signal and GND, ensuring that the current flows through the fuse of the target pull-down branch.

[0033] Furthermore, the aforementioned reference selection module includes a reference potential selection unit. This unit, according to circuit configuration instructions, connects the signal loop of the signal processing module to the reference potential corresponding to the target fuse branch, forming a directional fuse current loop that flows only through the target fuse branch. Each redundant configuration branch corresponds to a different reference potential. The reference potential selection unit, according to circuit configuration instructions, selects only one reference potential matching the current target fuse branch from among the different reference potentials corresponding to multiple redundant branches, and connects this reference potential to the output loop of the signal processing module. The reference potentials of the remaining non-target branches remain open. During fuse operation, the fuse driving signal output by the signal processing module is applied to the common signal link. Although all redundant branches are connected to the same common signal link, only the selected target fuse branch can form a complete, closed current path with the reference potential selection unit. This creates a directional fuse current flowing through the fusible switching element within the branch, ensuring reliable fuse breaking. For redundant branches that are not selected, since their corresponding reference potentials are in an open circuit state, a closed current loop cannot be formed. Only voltage fluctuations exist within the branch, without continuous fusing current, thus preventing accidental fusing and interference from the fusing drive signal. Through this configuration, under the premise that multiple sets of parallel redundant branches share the same common signal link and the same fusing drive signal, directional, unique, crosstalk-free, and malfunction-free fusing control can be achieved solely through reference potential selection control. Simultaneously, it avoids fusing current and electromagnetic interference from crosstalking to other branches or affecting the front-end sampling circuit, improving the reliability and anti-interference capability of the entire configuration circuit. In one embodiment, the reference potential selection unit is a single-pole double-throw switch structure. Its different switching channels correspond to the reference potentials of at least two sets of redundant configuration branches, namely, the high-level reference potential VDD and the low-level reference potential GND, used to switch conduction between the high-level and low-level reference potentials corresponding to at least two sets of redundant configuration branches.

[0034] The reference potential selection unit can selectively switch between a high-level reference potential and a low-level reference potential according to circuit configuration instructions. Only the fuse-driving signal loop output by the signal processing module is connected to one reference potential corresponding to the current target fuse-breaking branch, while the other reference potential remains open. Since each group of redundant configuration branches is connected in parallel to a common signal link, a complete current loop containing the fusible switching element can only be formed when its corresponding reference potential is turned on. Branches that are not turned on have no closed current path, only a voltage signal without fuse current. Through the selection and switching of the single-pole double-throw switch, it can be ensured that the fuse-driving signal only forms a directional fuse current in the target fuse-breaking branch, fusing only the fusible switching element of the target branch. Under the premise of multiple branches connected in parallel and sharing a common signal link, precise fuse control without crosstalk and without error-free fusing is achieved.

[0035] Reference Figure 3 A schematic diagram corresponding to an embodiment of the present invention is shown, illustrating the control flow of fuse driving and precise path selection in this embodiment. The main control module, as the core of system control, coordinates global configuration and process control. It sends enable and frequency control commands to the function generation module, specifying the start / stop and operating frequency of the modulation signal; it sends gain control commands to the power amplification unit, adjusting the signal amplification factor; it sends bias control commands to the bias unit, adjusting the reference level of the fuse driving signal; and it sends reference control commands to the reference potential selection unit, selecting the reference potential (Vdd / GND) corresponding to the target fuse branch. The function generation module, power amplification module, and bias module each execute their corresponding actions to form an effective voltage difference to drive the fuse current, thereby outputting the final fuse driving signal to the common signal link. Figure 3 The switching structure in the middle is the single-pole double-throw switch structure mentioned above, which is used to receive the reference control command of the main control module, switch between high-level reference potential Vdd and low-level reference potential GND to provide a reference potential path only for the target fuse branch, forming a directional fuse current loop.

[0036] Furthermore, the configuration device also includes a status feedback module, which is connected to the main control module and the common signal link. This module collects the signal status information of the common signal link and feeds it back to the main control module, allowing the main control module to confirm whether the fusible switching element of the target fusible branch has blown. The status feedback module can collect real-time status information such as voltage amplitude, impedance, and signal strength of the common signal link, obtaining changes in circuit characteristics before and after the fuse blows. The collected signal status information is fed back to the main control module in the form of electrical or digital signals, forming a closed-loop control link. For example, before the fuse blows, the fusible switching element of the target fusible branch is in a conducting state, and the common signal link forms a low-impedance path with the corresponding reference potential (Vdd / GND), exhibiting specific amplitude and impedance characteristics. During the fuse blown process, the fusible switching element gradually blows, and the impedance and signal amplitude of the common signal link change significantly. The status feedback module captures this change and synchronously feeds it back to the main control module. After the fuse blows, the fusible switching element is completely disconnected, the current loop of the target fusible branch is cut off, the impedance of the common signal link rises to an open circuit state, and the signal amplitude and strength characteristics change significantly. The main control module can confirm whether the fusible switching element of the target fusible branch has successfully blown by comparing the signal state information before and after the fuse blows, thus completing the configuration result verification.

[0037] In one implementation, the state feedback module is a peak capture module, used to detect the peak value of the fuse-breaking drive signal and the load impedance change of the signal processing interface circuit. The peak amplitude information of the fuse-breaking drive signal output from the bias unit to the common signal link can be extracted in real time to determine whether the signal output strength meets the fuse-breaking requirements. For example, before fusing, the fusible switch element of the target fuse-breaking branch is in the conducting state, and the common signal link forms a low-impedance path with the corresponding reference potential. At this time, the fuse-breaking drive signal exhibits a stable peak amplitude, and the load impedance is a specific low value. During the fusing process, the fusible switch element gradually melts, the current loop impedance of the target link gradually increases, and the load impedance of the common signal link increases accordingly. The peak amplitude of the fuse-breaking drive signal changes significantly, and the peak capture module synchronously captures this change and feeds it back to the main control module. After fusing, the fusible switch element is completely disconnected, the current loop of the target fuse-breaking branch is cut off, the load impedance of the common signal link rises to near an open circuit state, and the peak amplitude of the fuse-breaking drive signal changes significantly. By comparing the peak data before and after the fuse failure with the load impedance characteristics, the main control module can confirm whether the fusible switching element of the target fusible branch has successfully failed, thus validally verifying the configuration result. In summary, through the overall control of the main control module, the generation of precise drive signals by the signal processing module, the directional routing by the reference potential selection unit, and the closed-loop verification of peak capture / impedance detection, it is possible to achieve crosstalk-free, error-free, and verifiable precise fuse failure control of the target fusible switching element in scenarios with multiple branches in parallel and sharing a common signal link.

[0038] Furthermore, embodiments of the present invention can be integrated into pre-designed automated production line equipment to configure the electrical characteristics of the signal processing interface circuit before product shipment. During the production line program writing or functional testing phase, the signal processing interface circuit of the product to be configured can be connected via a connector. Depending on the application scenario, the fuses of the target redundant branches can be selectively blown to permanently solidify the pull-up / pull-down bias and electromagnetic compatibility characteristics of the interface circuit. The configuration result is confirmed through closed-loop verification, achieving integration of the production process and interface configuration, improving production efficiency and product quality stability. (Refer to...) Figure 4 , Figure 4The diagram illustrates the connection between the signal processing interface circuit and the configuration device. The 'production line programming / testing equipment' connects to the 'controller / signal acquisition equipment' via connectors. The signal processing interface circuit is located at the PCB port of the 'controller / signal acquisition equipment', including a pull-up branch connected to Vdd and a pull-down branch connected to GND. Each branch contains a fuse, pull-up / pull-down resistors, and EMC capacitors. The production line programming / testing equipment integrates an interface configuration device, including a circuit selection and signal injection unit and a single-pole double-throw reference potential selection unit. During the production line configuration stage, the interface configuration device establishes a connection with the target interface circuit via connectors. The main control module controls the reference potential selection unit to select the reference potential of the target branch. Subsequently, the resonant frequency of the interface circuit is confirmed by frequency sweeping, and a sinusoidal fuse-breaking drive signal is output at this frequency. The DC blocking and AC passing characteristics of the EMC capacitor are used to blow the target fuse. Finally, the peak capture module detects the change in the interface signal peak value to confirm the fuse-blown state, completing the permanent configuration of the interface circuit. In one implementation, the signal processing interface circuit can be deployed on the PCB ports of various control units and signal acquisition and processing equipment. Its core function is to improve the electromagnetic compatibility performance of the interface and provide suitable pull-up or pull-down biases for the signal source, making it widely adaptable to analog, digital, and some frequency signal acquisition scenarios. The configuration device in this embodiment can be integrated into production line testing and programming equipment. During the programming process before product shipment, the electrical characteristics of the signal processing interface circuit are customized simultaneously, achieving integration of the production process and interface configuration.

[0039] In production line configuration scenarios, the interface configuration device and the controller or signal acquisition and processing equipment can establish an electrical connection between the plug-in via a connector. Based on application scenario instructions, the main control module controls the reference selection module to connect the production line-side signal ground with the reference potential (Vdd or GND) corresponding to the target interface circuit, thus establishing a current loop foundation for the target redundant branch to be configured. After the circuit is turned on, the main control module controls the bias module to adjust the output signal level to the safe operating range of the interface circuit. The control function generation module outputs a sweep frequency signal, which is then injected into the interface circuit with a fixed low gain through the power amplification module. Finally, the peak detection module acquires the peak waveform at the interface to locate and confirm the resonant frequency of the interface circuit.

[0040] After frequency sweeping, the main control module's control function generation module outputs the confirmed resonant frequency sinusoidal signal and increases the power amplifier module gain to output a sufficiently strong drive signal. Utilizing the DC-blocking and AC-passing characteristics of the EMC capacitor in the interface circuit, AC current can be directed through the target fuse and melted by Joule heating, achieving permanent failure of the corresponding redundant branch. After the target fuse melts, the input impedance of the interface circuit increases significantly, causing a synchronous rise in the peak value of the configuration device's output signal. The main control module captures this characteristic change through the peak detection module to confirm the fuse's melting state and complete the final configuration of the interface circuit. The configured interface circuit's electrical characteristics are permanently solidified by the fuse's melting, unaffected by power-on / off cycles, data writing, or daily use, exhibiting excellent stability and robustness, and showing promising prospects for engineering applications.

[0041] Furthermore, based on the above embodiments, this invention also provides a vehicle controller. The signal processing interface circuit of this vehicle controller includes at least two sets of redundant configuration branches and a common signal link connected to the common sampling terminal of each redundant configuration branch. The execution module of the configuration device in the above embodiments is connected to the common signal link to perform fuse-breaking processing on the target fuse-breaking branch in the at least two sets of redundant configuration branches. The vehicle controller provided by this invention has the same implementation principle and technical effects as the aforementioned configuration device embodiment of the signal processing interface circuit. For the sake of brevity, any parts not mentioned in the vehicle controller embodiment can be referred to the corresponding content in the aforementioned configuration device embodiment of the signal processing interface circuit.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A configuration device for a signal processing interface circuit, characterized in that, The device includes: The main control module is used to obtain the electrical configuration requirements of the external related components of the signal processing interface circuit and generate circuit configuration instructions according to the electrical configuration requirements; wherein, the signal processing interface circuit includes at least two sets of redundant configuration branches and a common signal link connected to the common sampling terminal of each of the redundant configuration branches. An execution module is configured to determine a target fuse branch from the redundant configuration branches according to the circuit configuration instructions, and perform fuse breaking processing on the target fuse branch through the common signal link, so that the signal processing interface circuit can adapt to the electrical configuration requirements of the external associated components.

2. The configuration device for the signal processing interface circuit according to claim 1, wherein each group of redundant configuration branches includes a fusible switch element and an interface circuit element, wherein the fusible switch element is connected in series between the interface circuit element and the reference potential of the corresponding branch; The execution module includes: The reference selection module is used to determine the target fuse branch from multiple redundant configuration branches of the signal interface circuit according to the circuit configuration instructions, and to form a fuse current path for the target fuse branch. The signal processing module is used to generate a fuse drive signal according to the circuit configuration instructions, and input the fuse drive signal to the common signal link so as to fuse the fuseable switching element of the target fuse branch through the fuse current path.

3. The configuration device for the signal processing interface circuit according to claim 2, characterized in that, The reference selection module includes a reference potential selection unit; The reference potential selection unit is used to connect the signal loop of the signal processing module to the reference potential corresponding to the target fuse branch according to the circuit configuration instruction, so as to form a directional fuse current loop that flows only through the target fuse branch.

4. The configuration device for the signal processing interface circuit according to claim 3, characterized in that, The reference potential selection unit is a single-pole double-throw switch structure, used to switch between high-level reference potential and low-level reference potential corresponding to the at least two sets of redundant configuration branches.

5. The configuration device for the signal processing interface circuit according to claim 2, characterized in that, The signal processing module includes a function generation unit and a power amplification unit; The function generation unit is used to generate a modulation signal of a specific frequency according to the circuit configuration instructions; The power amplification unit is used to amplify the power of the modulation signal to generate the fuse drive signal.

6. The configuration device for the signal processing interface circuit according to claim 2, characterized in that, The signal processing module also includes a bias unit; The bias unit is used to adjust the reference level of the fuse drive signal according to the circuit configuration instructions.

7. The configuration device for the signal processing interface circuit according to claim 1, characterized in that, The device further includes a status feedback module, which is connected to the main control module and the common signal link; The status feedback module is used to collect the signal status information of the common signal link and feed it back to the main control module so that the main control module can confirm whether the target fuse branch has been blown.

8. The configuration device for the signal processing interface circuit according to claim 7, characterized in that, The status feedback module is a peak capture module, used to detect the peak value of the fuse drive signal of the execution module and the load impedance change of the signal processing interface circuit.

9. The configuration apparatus for the signal processing interface circuit according to any one of claims 1 to 8, characterized in that, The device is integrated into a pre-designed automated production line and is used to configure the electrical characteristics of the signal processing interface circuit before the product leaves the factory.

10. A vehicle controller, characterized in that, The signal processing interface circuit of the vehicle controller includes at least two sets of redundant configuration branches, and a common signal link connected to the common sampling terminal of each of the redundant configuration branches. The execution module of the device according to any one of claims 1 to 9 is connected to the common signal link to perform fuse-breaking processing on the target fuse branch in at least two sets of redundant configuration branches.

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