Detection circuit, controller and vehicle

Abstract

The utility model relates to the technical field of power supply output, and discloses a detection circuit, a controller and a vehicle, the detection circuit comprises a power supply end connected with a grounding end and used for providing a power supply with a set voltage; a ground terminal; the first end of the bypass capacitor is connected with the power supply end, and the second end is connected with the grounding end; the first end of the redundant capacitor is connected with the power supply end, and the second end of the redundant capacitor is connected with the first end of the bypass capacitor, or the first end of the redundant capacitor is connected with the second end of the bypass capacitor, and the second end of the redundant capacitor is connected with the grounding end; the first end of the power supply output end is connected with a first output point between the power supply end and the bypass capacitor, or the first end of the power supply output end is connected with a second output point between the power supply end and the redundant capacitor, and the second end of the power supply output end is connected with the power utilization end. The safety problem caused by faults such as short circuit of the bypass capacitor is effectively avoided, the power supply safety of the power supply end to the power utilization end is fully ensured, and the user experience is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of power output technology, specifically to a detection circuit, a controller, and a vehicle. Background Technology

[0002] For certain circuit functional modules of the vehicle domain controller, which have high safety requirements, redundant circuitry is needed to enhance their safety level. For example, some chips require additional pull-down bypass capacitors in their power supplies. However, if a capacitor experiences a short circuit, the module will also lose its functionality, severely impacting vehicle safety and causing serious safety issues. Summary of the Invention

[0003] In view of this, the present invention provides a detection circuit, a controller, and a vehicle to solve the problem of power supply failure and serious safety issues caused by capacitor failure in the power supply circuit in related technologies.

[0004] In a first aspect, this utility model provides a detection circuit, which includes:

[0005] The power supply terminal, connected to the ground terminal, is used to provide a power supply with a set voltage.

[0006] Grounding terminal;

[0007] The bypass capacitor has its first terminal connected to the power supply terminal and its second terminal connected to the ground terminal.

[0008] Redundant capacitors are used where the first terminal of a redundant capacitor is connected to the power supply terminal and the second terminal is connected to the first terminal of a bypass capacitor, or the first terminal of a redundant capacitor is connected to the second terminal of a bypass capacitor and the second terminal is connected to the ground terminal.

[0009] The power output terminal is connected to the first output point between the power supply terminal and the bypass capacitor, or the first output point between the power supply terminal and the redundant capacitor, and the second output point between the power supply terminal and the power consumption terminal.

[0010] The detection circuit provided in this embodiment adds a redundant capacitor between the power supply terminal and the ground terminal, which effectively avoids safety problems caused by short circuits or other faults caused by the bypass capacitor, fully ensures the power supply safety from the power supply terminal to the power user terminal, and significantly improves the user experience.

[0011] In one optional implementation, the detection circuit further includes:

[0012] The detection circuit is connected between the detection signal processing unit and the first detection point;

[0013] The detection signal processing unit is used to acquire the detection data collected by the detection circuit and to diagnose the operating status of the detection circuit based on the detection data.

[0014] The first detection point is located between the bypass capacitor and the redundant capacitor.

[0015] The detection circuit provided in this embodiment of the utility model adds a detection circuit, which can diagnose faults in the bypass capacitors or redundant circuits in the detection circuit, and quickly locate faults when they occur, significantly improving the functional safety level of the detection circuit.

[0016] In one alternative implementation, the detection circuit includes:

[0017] The first resistor has its first end connected to the power supply terminal and its second end connected to the second resistor.

[0018] The second resistor has its first end connected to the first resistor and its second end grounded.

[0019] The detection circuit provided in this embodiment of the utility model realizes the detection link through two resistors connected in series. If the bypass capacitor or redundant capacitor fails, the bypass capacitor or redundant circuit can be diagnosed based on the voltage value of the voltage acquisition point between the first resistor and the second resistor, and the fault location can be quickly performed when a fault occurs, which significantly improves the functional safety level of the detection circuit.

[0020] In one optional implementation, the detection circuit further includes:

[0021] The voltage divider resistor has its first end connected to the signal processing unit, and its second end connected to the voltage acquisition point between the first and second resistors.

[0022] The detection circuit provided in this embodiment of the invention incorporates voltage-dividing resistors. When a capacitor located close to the power supply fails, it divides the power supply voltage. By selecting the resistance value of the voltage-dividing resistors, the voltage acquired by the detection signal processing unit is controlled within a set range. This results in more accurate data acquisition by the detection signal processing unit, leading to more precise fault diagnosis and analysis. It significantly improves the functional safety level of the detection circuit.

[0023] In one optional implementation, the detection circuit further includes:

[0024] The filter branch has one end connected to the filter point between the voltage divider resistor and the detection signal processing unit, and the other end grounded.

[0025] The detection circuit provided in this embodiment of the utility model has a filter branch in the detection circuit, which makes the data acquisition of the detection signal processing unit more accurate, thereby realizing more accurate fault judgment and analysis, and significantly improving the functional safety level of the detection circuit.

[0026] In one alternative implementation, the filter branch includes a filter capacitor and a filter resistor, which are connected in parallel.

[0027] In one alternative implementation, the detection signal processing unit is a microprocessor.

[0028] Secondly, this utility model provides a controller, which includes:

[0029] At least one detection circuit of the first aspect above or any corresponding embodiment thereof;

[0030] The microprocessor, connected to the detection circuit, is used to collect the detection data from the detection circuit and diagnose the operating status of the detection circuit based on the detection data.

[0031] In one alternative implementation, the controller includes multiple detection circuits;

[0032] The controller also includes logic control circuitry, which includes:

[0033] The signal control terminal is connected to the microprocessor.

[0034] Multiple signal connection terminals are connected to multiple detection circuits respectively;

[0035] A multiplexer, connected to a signal control terminal and multiple signal connection terminals, is used to select the detection circuit that interacts with the microprocessor through the signal control terminal after performing logical judgments on multiple detection circuits.

[0036] Thirdly, the present invention provides a vehicle, which includes a controller according to the first aspect or any corresponding embodiment described above. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram illustrating the implementation principle of the detection circuit according to an embodiment of the present utility model;

[0039] Figure 2 This is a schematic diagram illustrating the implementation principle of another detection circuit according to an embodiment of the present utility model;

[0040] Figure 3 This is a schematic diagram illustrating the implementation principle of another detection circuit according to an embodiment of the present utility model;

[0041] Figure 4 This is a schematic diagram illustrating the implementation principle of another detection circuit according to an embodiment of the present utility model;

[0042] Figure 5 This is a schematic diagram of the composition structure of the controller according to an embodiment of the present utility model;

[0043] Among them, VS is the power supply terminal; GND is the ground terminal; and VCC is the power supply terminal.

[0044] C1 is the bypass capacitor; C2 is the redundant capacitor; R1 is the first resistor;

[0045] R2 is the second resistor; Rf is the voltage divider resistor; Cl is the filter capacitor;

[0046] Rl filter resistor; JCD detection signal processing unit;

[0047] J1 is the first detection point; J2 is the voltage acquisition point; J3 is the filter point. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0049] This invention provides a detection circuit, a controller, and a vehicle to solve the problem of power supply failure and serious safety issues caused by capacitor failure in power supply circuits in related technologies.

[0050] According to an embodiment of the present invention, a detection circuit embodiment is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0051] This embodiment provides a detection circuit. Figure 1 This is a schematic diagram illustrating the implementation principle of the detection circuit according to an embodiment of the present invention, as shown below. Figure 1As shown, the detection circuit includes: a power supply terminal VS, a ground terminal GND, a bypass capacitor C1, a redundant capacitor C2, and a power output terminal VCC. The power supply terminal VS is connected to the power output terminal VCC and is used to provide the power for the set voltage. The set voltage provided by the power supply terminal VS can be 9V to 16V, for example, 13.5V.

[0052] The first terminal of bypass capacitor C1 is connected to the power supply terminal VS, and the second terminal of bypass capacitor C1 is connected to the ground terminal GND. The first terminal of redundant capacitor C2 is connected to the power supply terminal VS, and the second terminal is connected to the first terminal of bypass capacitor C1. Alternatively, the first terminal of redundant capacitor C2 is connected to the second terminal of bypass capacitor C1, and the second terminal is connected to the ground terminal GND. The first terminal of the power supply output is connected to the first output point between the power supply terminal VS and bypass capacitor C1, or the first terminal of the power supply output is connected to the second output point between the power supply terminal VS and redundant capacitor C2. The second terminal of the power supply output is connected to the power consumption terminal VCC.

[0053] It should be noted that, Figure 1 and the following Figures 2-4 The following example illustrates the solution: "The first terminal of redundant capacitor C2 is connected to the power supply terminal VS, and the second terminal is connected to the first terminal of bypass capacitor C1." In practical applications, the positions of bypass capacitor C1 and redundant capacitor C2 can be interchanged, and their capacitance values ​​can be equal or unequal.

[0054] Thus, if a short circuit occurs in either the bypass capacitor or the redundant capacitor, the presence of the other capacitor can effectively prevent a direct short circuit between the power supply terminal and the ground terminal, thereby avoiding the power supply terminal being unable to supply power to the user terminal and the serious safety problems that would result.

[0055] The detection circuit provided in this embodiment adds a redundant capacitor between the power supply terminal and the ground terminal, which effectively avoids safety problems caused by short circuits or other faults caused by the bypass capacitor, fully ensures the power supply safety from the power supply terminal to the power user terminal, and significantly improves the user experience.

[0056] This embodiment provides a detection circuit. Figure 2 This is a schematic diagram illustrating the implementation principle of another detection circuit according to an embodiment of the present utility model, as shown below. Figure 2 As shown, the detection circuit includes a power supply terminal VS, a ground terminal GND, a bypass capacitor C1, a redundant capacitor C2, a power supply output terminal VCC, and a detection circuit ( Figure 2(The first resistor R1 and the second resistor R2 are shown in the diagram). The power supply terminal VS is connected to the power output terminal VCC to provide the set voltage. The detection circuit is connected between the detection signal processing unit JCD and the first detection point J1. The detection signal processing unit JCD acquires the detection data collected by the detection circuit and diagnoses the operating status of the detection circuit based on the detection data. The first detection point J1 is located between the bypass capacitor C1 and the redundant capacitor C2.

[0057] Specifically, the detection signal processing unit JCD acquires the detection data collected by the detection circuit. For example, the detection data may be data such as the voltage at the first detection point J1. The detection signal processing unit JCD can diagnose faults such as short circuits in the bypass capacitor of the detection circuit based on the voltage data at the first detection point J1.

[0058] In one optional embodiment, the detection circuit includes a first resistor R1 and a second resistor R2. A first terminal of the first resistor R1 is connected to the power supply terminal VS, and a second terminal of the first resistor R1 is connected to the second resistor R2. A first terminal of the second resistor R2 is connected to the first resistor R1, and a second terminal of the second resistor R2 is grounded.

[0059] In one alternative implementation, the resistance values ​​of the first resistor R1 and the second resistor R2 may be equal or unequal.

[0060] Taking the example where bypass capacitor C1 and redundant capacitor C2 have the same capacitance, and the first resistor R1 and the second resistor R2 have the same resistance, if bypass capacitor C1 experiences a short circuit, the voltage at the first detection point J1 between bypass capacitor C1 and redundant capacitor C2 will be the voltage at the power supply terminal VS. If redundant capacitor C2 experiences a short circuit, the voltage at the first detection point J1 between bypass capacitor C1 and redundant capacitor C2 will be zero. Therefore, the detection signal processing unit JCD can quickly determine whether bypass capacitor C1 and redundant capacitor C2 have experienced a short circuit based on the voltage value collected at point J1.

[0061] In one alternative implementation, the detection signal processing unit JCD can be a microcontroller unit (MCU).

[0062] The detection circuit provided in this embodiment adds a detection circuit and realizes the detection link through two resistors connected in series. If the bypass capacitor or redundant capacitor fails, the bypass capacitor or redundant circuit can be diagnosed based on the voltage value of the voltage acquisition point between the first resistor and the second resistor, and the fault location can be quickly performed when a fault occurs, which significantly improves the functional safety level of the detection circuit.

[0063] The detection signal processing unit JCD typically has a certain voltage acquisition range. For example, the vehicle controller usually uses an MCU with a voltage acquisition range of 0-5V. Therefore, in order to ensure that the voltage value of the first detection point J1 is within the voltage acquisition range of the detection signal processing unit JCD, a voltage divider resistor Rf is also set in the detection circuit for voltage division. Figure 3 This is a schematic diagram illustrating the implementation principle of another detection circuit according to an embodiment of the present utility model, as shown below. Figure 3 As shown, the detection circuit includes a power supply terminal VS, a ground terminal GND, a bypass capacitor C1, a redundant capacitor C2, a power supply output terminal VCC, and a detection circuit ( Figure 2 (The first resistor R1 and the second resistor R2 are shown in the diagram). The power supply terminal VS is connected to the power output terminal VCC to provide the power for the set voltage. A detection circuit is connected between the detection signal processing unit JCD and the first detection point J1. The detection signal processing unit JCD acquires the detection data collected by the detection circuit and diagnoses the operating status of the detection circuit based on the detection data. The first detection point J1 is located between the bypass capacitor C1 and the redundant capacitor C2. Furthermore, the detection circuit also includes a voltage divider resistor Rf. The first end of the voltage divider resistor Rf is connected to the detection signal processing unit JCD, and the second end of the voltage divider resistor Rf is connected to the voltage acquisition point J2 between the first resistor R1 and the second resistor R2. Under normal circumstances, the voltage values ​​at the first detection point J1 and the voltage acquisition point J2 are equal.

[0064] It should be noted that the resistance value of the voltage divider resistor Rf can be determined according to the voltage acquisition range of the detection signal processing unit, and there is no limitation here.

[0065] The detection circuit provided in this embodiment of the invention incorporates voltage-dividing resistors. When a capacitor located close to the power supply fails, it divides the power supply voltage. By selecting the resistance value of the voltage-dividing resistors, the voltage acquired by the detection signal processing unit is controlled within a set range. This results in more accurate data acquisition by the detection signal processing unit, leading to more precise fault diagnosis and analysis. It significantly improves the functional safety level of the detection circuit.

[0066] To further improve the accuracy of signal acquisition and processing of the detection signal processing unit, in an optional embodiment of this utility model, a filtering branch is also provided in the detection circuit. Figure 4 This is a schematic diagram illustrating the implementation principle of another detection circuit according to an embodiment of the present utility model, as shown below. Figure 4 As shown, the detection circuit includes a power supply terminal VS, a ground terminal GND, a bypass capacitor C1, a redundant capacitor C2, a power supply output terminal VCC, and a detection circuit ( Figure 2(The first resistor R1 and the second resistor R2 are shown in the diagram). The power supply terminal VS is connected to the power output terminal VCC to provide the set voltage. A detection circuit is connected between the detection signal processing unit JCD and the first detection point J1. The detection signal processing unit acquires the detection data collected by the detection circuit and diagnoses the operating status of the detection circuit based on the detection data. The first detection point is located between the bypass capacitor and the redundant capacitor. Furthermore, the detection circuit also includes a voltage divider resistor Rf. The first end of the voltage divider resistor is connected to the detection signal processing unit, and the second end of the voltage divider resistor is connected to the voltage acquisition point J2 between the first and second resistors. Under normal circumstances, the voltage values ​​at the first detection point J1 and the voltage acquisition point J2 are equal. Further still, the detection circuit also includes a filter branch. One end of the filter branch is connected to the filter point J3 between the voltage divider resistor and the detection signal processing unit, and the other end is grounded.

[0067] In one optional implementation, the filtering branch includes a filter capacitor and a filter resistor. The filter capacitor and filter resistor are connected in parallel.

[0068] like Figure 4 As shown, taking the MCU as the signal processing unit, the analog input / output port of the MCU is connected to the filter point J3. The voltage range of the power supply terminal VS is 9V-16V. The bypass capacitor and redundant capacitor are 4u7 / 50V capacitors. The first resistor, the second resistor, and the filter resistor are all 51K 1% resistors. The voltage divider resistor is a 100K 1% resistor, and the filter capacitor is a 100n / 50V capacitor. When the bypass capacitor and redundant capacitor are not short-circuited and are working normally, the voltage value collected by the MCU is 1.5V-2.7V. Based on this voltage, the detection circuit is judged to be working normally.

[0069] When a short-circuit fault occurs in the bypass capacitor, the voltage value collected by the MCU is 3V-5.4V. If the MCU's voltage collection range is 5V, then the maximum voltage value that the MCU's input / output ports can collect at this time is 5V. Using the 3V-5V voltage value collected by the MCU, the faulty component is quickly located as the bypass capacitor C1. When a short-circuit fault occurs in C1377, the voltage value collected by the MCU is 0V. Therefore, the maximum voltage value that the MCU's input / output ports can collect at this time is 0V. Using the 0V voltage value collected by the MCU, the faulty component is quickly located as the redundant capacitor C2.

[0070] The detection circuit provided in this embodiment of the utility model has a filter branch in the detection circuit, which makes the data acquisition of the detection signal processing unit more accurate, thereby realizing more accurate fault judgment and analysis, and significantly improving the functional safety level of the detection circuit.

[0071] This embodiment also provides a controller, such as Figure 5 As shown, the controller includes:

[0072] At least one detection circuit 501 of the first aspect above or any corresponding embodiment thereof;

[0073] The microprocessor 502 is connected to the detection circuit 501 and is used to collect the detection data of the detection circuit 501 and diagnose the operating status of the detection circuit 501 based on the detection data.

[0074] In one alternative implementation, the controller includes multiple detection circuits;

[0075] The controller also includes logic control circuitry (not shown in the figure), which includes:

[0076] The signal control terminal is connected to the microprocessor.

[0077] Multiple signal connection terminals are connected to multiple detection circuits respectively;

[0078] A multiplexer, connected to a signal control terminal and multiple signal connection terminals, is used to select the detection circuit that interacts with the microprocessor through the signal control terminal after performing logical judgments on multiple detection circuits.

[0079] Thirdly, this utility model provides a vehicle, which includes the above-mentioned components. Figure 5 The controller shown.

[0080] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A detection circuit, characterized in that, The detection circuit includes: The power supply terminal (VS) is connected to the ground terminal (GND) and is used to provide power at the set voltage. Ground terminal (GND); A bypass capacitor (C1) is provided, with its first terminal connected to the power supply terminal (VS) and its second terminal connected to the ground terminal (GND). A redundant capacitor (C2) is provided, wherein the first end of the redundant capacitor (C2) is connected to the power supply terminal (VS) and the second end is connected to the first end of the bypass capacitor (C1), or the first end of the redundant capacitor (C2) is connected to the second end of the bypass capacitor (C1) and the second end is connected to the ground terminal (GND). The power output terminal is a first output point connected between the power supply terminal (VS) and the bypass capacitor (C1) or a second output point connected between the power supply terminal (VS) and the redundant capacitor (C2).

2. The detection circuit according to claim 1, characterized in that, The detection circuit further includes: The detection circuit is connected between the detection signal processing unit (JCD) and the first detection point (J1); The detection signal processing unit (JCD) is used to acquire the detection data collected by the detection circuit and to diagnose the operating status of the detection circuit based on the detection data. The first detection point (J1) is located between the bypass capacitor (C1) and the redundant capacitor (C2).

3. The detection circuit according to claim 2, characterized in that, The detection circuit includes: A first resistor (R1) is connected to the power supply terminal (VS) at its first end and to the second resistor (R2) at its second end. The second resistor (R2) has its first end connected to the first resistor (R1), and its second end grounded.

4. The detection circuit according to claim 3, characterized in that, The detection circuit further includes: A voltage divider resistor (Rf) is provided, with its first end connected to the detection signal processing unit (JCD) and its second end connected to the voltage acquisition point (J2) between the first resistor (R1) and the second resistor (R2).

5. The detection circuit according to claim 4, characterized in that, The detection circuit further includes: The filtering branch has one end connected to the filter point (J3) between the voltage divider resistor (Rf) and the detection signal processing unit (JCD), and the other end grounded.

6. The detection circuit according to claim 5, characterized in that, The filtering branch includes a filter capacitor (C1) and a filter resistor (R1), which are connected in parallel.

7. The detection circuit according to any one of claims 2-6, characterized in that, The detection signal processing unit (JCD) is a microprocessor.

8. A controller, characterized in that, The controller includes: At least one detection circuit as described in any one of claims 2-7; A microprocessor, connected to the detection circuit, is used to collect detection data from the detection circuit and diagnose the operating status of the detection circuit based on the detection data.

9. The controller according to claim 8, characterized in that, The controller includes multiple of the detection circuits; The controller further includes a logic control circuit, the logic control circuit comprising: The signal control terminal is connected to the microprocessor; Multiple signal connection terminals are respectively connected to multiple of the aforementioned detection circuits; A multiplexer, connected to the signal control terminal and multiple signal connection terminals, is used to select the detection circuit that interacts with the microprocessor through the signal control terminal after performing logical judgments on multiple detection circuits.

10. A vehicle, characterized in that, The vehicle includes the controller as described in claim 8 or 9.

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