Automobile wiper drive module, automobile wiper system and automobile

Abstract

The present invention discloses an automobile wiper drive module, an automobile wiper system, and an automobile. In the automobile wiper drive module, the first controlled end of the first switch device is connected to the first control end of the controller, the first output end of the first switch device is connected to the third input end and to the first detection end, and the second output ends of the second switch device are respectively used to connect to the speed gear adjustment end of the wiper motor. The present invention can promptly detect faults in situations such as short circuit faults in the automobile wiper system, thereby prompting users to avoid using the automobile wiper system, and promptly troubleshooting or sending the system for repair, which is conducive to reducing the expansion of faults and ensuring the safety of automobile use. It can also enable users to promptly discover faults in the automobile wiper system, thereby avoiding the inability to use the automobile wipers when needed, and reducing the traffic risk of unclear vision due to the inability to use the automobile wipers normally. The present invention is widely used in the field of automobile technology.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, in particular to an automobile wiper drive module, an automobile wiper system and an automobile. Background Art

[0002] Cars are equipped with wiper systems to scrape off rain, snow, and other debris adhering to the windshield in rainy and snowy weather, maintaining a clear field of vision for the driver. The working principle of the wiper system is to use a wiper motor to drive the wipers (also known as wiper blades, wiper strips, wipers, etc.) to swing across the surface of the windshield, thereby scraping. Since the wiper system contains moving parts and the working environment is directly affected by rain, frost, snow, and direct sunlight, the wiper system is prone to failure, especially short circuit failure of the circuit components. Failure of the wiper system may cause the wiper system to fail to work properly, making it impossible to maintain a clear field of vision for the driver in rainy and snowy weather, affecting traffic safety. In addition, failure of the wiper system may also affect components such as the power supply circuit of the entire vehicle, posing a hidden danger of fire.

[0003] The current car wiper system is not equipped with a fault detection function. The driver can only determine whether the wiper system has a fault by observing whether the wipers are swinging normally. However, this approach may cause the fault to expand. Sometimes the wiper system has a fault but the wipers can still swing, which may lead to misjudgment. Summary of the Invention

[0004] In view of the technical problems that the current automobile wiper system is not equipped with a fault detection function, which makes it difficult to judge the fault when it occurs and the fault is easily expanded, the purpose of the present invention is to provide an automobile wiper drive module, an automobile wiper system and an automobile.

[0005] In one aspect, an embodiment of the present invention includes a vehicle wiper drive module, the vehicle wiper drive module including:

[0006] Controller; the controller is provided with a first control terminal, a second control terminal and a first detection terminal;

[0007] a first switching device; the first switching device having a first controlled terminal, a first input terminal, a second input terminal, and a first output terminal; the first controlled terminal being connected to the first control terminal; the first switching device being configured to selectively connect the first output terminal to the first input terminal or the second input terminal based on a signal received by the first controlled terminal;

[0008] a second switching device; the second switching device comprises a second controlled terminal, a third input terminal, and a plurality of second output terminals; each of the second output terminals is respectively connected to a speed gear adjustment terminal of the wiper motor; the second switching device is configured to selectively connect the third input terminal and any of the second output terminals based on a signal received by the second controlled terminal;

[0009] The first output terminal is connected to the third input terminal and to the first detection terminal.

[0010] Furthermore, the controller is configured to obtain first level information through detection at the first detection end, and determine fault information according to the first level information.

[0011] Furthermore, the first input terminal is used to connect to a power supply, and the second input terminal is used to be grounded.

[0012] Furthermore, the controller is provided with a second detection end; the second detection end is connected to the second output end.

[0013] Furthermore, the automobile wiper drive module further includes:

[0014] A first gate circuit; the input end of the first gate circuit is connected to the first output end and the first control end respectively, and the output end of the first gate circuit is connected to the first detection end.

[0015] Furthermore, the controller is configured to obtain first level information through detection at the first detection end, obtain second level information through detection at the second detection end, and determine fault information according to the first level information and the second level information.

[0016] Furthermore, the automobile wiper drive module further includes:

[0017] a second gate circuit; an input end of the second gate circuit is connected to each of the second output ends;

[0018] a third gate circuit; an input end of the third gate circuit is connected to the output end of the second gate circuit and the second control end respectively, and an output end of the third gate circuit is connected to the second detection end.

[0019] Furthermore, the first gate circuit and the third gate circuit are XOR gate circuits, and the second gate circuit is an OR gate circuit.

[0020] On the other hand, an embodiment of the present invention further includes a vehicle windshield wiper system, the vehicle windshield wiper system comprising:

[0021] The automobile wiper drive module according to any one of claims 1 to 8;

[0022] Wiper motor; the wiper motor is provided with a plurality of speed gear adjustment terminals, each of the speed gear adjustment terminals being respectively connected to the corresponding second output terminal of the automobile wiper drive module;

[0023] Wiper; the wiper motor is used to drive the wiper.

[0024] On the other hand, an embodiment of the present invention further includes a car, which includes the car wiper system of the embodiment.

[0025] The beneficial effects of the present invention are as follows: the automobile wiper drive module, automobile wiper system and automobile in the embodiment have a fault self-detection function of the automobile wiper, which can detect faults in time when a short circuit fault occurs in the automobile wiper system, thereby prompting the user to avoid using the automobile wiper system, and to conduct fault troubleshooting or send it for repair in time, which is conducive to reducing the expansion of faults and ensuring the safety of automobile use. It can also enable users to discover faults in the automobile wiper system in time, thereby avoiding the inability to use the automobile wipers when they are needed, and reducing the traffic risk of unclear vision due to the inability to use the automobile wipers normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the basic structure of the automobile wiper drive module in the embodiment;

[0027] Figure 2 Schematic diagram of the structure of the automobile wiper drive module provided with a second detection end in the embodiment;

[0028] Figure 3 Schematic diagram of the structure of the automobile wiper drive module provided with the first gate circuit in the embodiment;

[0029] Figure 4 Schematic diagram of the structure of the automobile wiper drive module provided with a second gate circuit in the embodiment;

[0030] Figure 5 Schematic diagram of the structure of the automobile wiper drive module provided with a third gate circuit in the embodiment. DETAILED DESCRIPTION

[0031] In this embodiment, a car wiper drive module is provided, which can be used to drive and control the wiper motor. Figure 1 shown.

[0032] Reference Figure 1 The automobile wiper drive module includes a controller, a first switching device and a second switching device. The controller is provided with a first control end and a second control end. The first control end is connected to the first controlled end of the first switching device, and the second control end is connected to the second controlled end of the second switching device.

[0033] In this embodiment, the controller in the automobile wiper driving module may be a zone control unit (ZCU).

[0034] In this embodiment, a relay is used as an example of the first switching device and the second switching device. Figure 1 The automobile wiper drive module uses a low-side drive (LSD) method. When the automobile wiper drive module sends a low-level control signal to the first controlled terminal (COL-) of the first switching device through the first control terminal, the coil in the first switching device will be energized, thereby causing the first input terminal (connected to a power supply with a voltage of +V) and the first output terminal of the first switching device to be conductive; when the automobile wiper drive module sends a high-level control signal to the first controlled terminal (COL-) of the first switching device through the first control terminal, the coil in the first switching device will be de-energized, thereby causing the second input terminal (grounded) and the first output terminal of the first switching device to be conductive.

[0035] Reference Figure 1 When the first switching device is turned off (that is, the automobile wiper driving module sends a high-level control signal to the first controlled terminal (COL-) of the first switching device through the first control terminal, so that the second input terminal (grounded) of the first switching device is connected), the wiper motor does not work regardless of the on-off state of the first switching device.

[0036] Reference Figure 1 In the case where the first switch device is turned on (that is, the automobile wiper driving module sends a low-level control signal to the first controlled terminal (COL-) of the first switch device through the first control terminal, so that the first input terminal (connected to the power supply with a voltage of +V) of the first switch device is connected to the first output terminal), when the automobile wiper driving module sends a low-level control signal to the second controlled terminal (COL-) of the second switch device through the second control terminal, the coil in the second switch device will be energized, thereby making the third input terminal of the second switch device (connected to the first output terminal of the first switch device with a voltage of +V) The level is high) is connected to the second output terminal 1, so the speed gear adjustment terminal (low speed gear) of the wiper motor obtains a high level, and the wiper motor works at low speed; when the automobile wiper drive module sends a high-level control signal to the second controlled terminal (COL-) of the second switching device through the second control terminal, it will cause the coil in the second switching device to be de-energized, so that the third input terminal of the second switching device (connected to the first output terminal of the voltage first switching device, at this time the level is high) is connected to the second output terminal 2, so the speed gear adjustment terminal (high speed gear) of the wiper motor obtains a high level, and the wiper motor works at high speed.

[0037] Since the first switch device can control the level of its first output terminal (connected to the third input terminal of the second switch) to control the wiper motor to work or not, the first switch device can be used as an on-off switch of the wiper motor. Figure 1 The second output terminal 1 and the second output terminal 2 in the wiper motor are controlled to control the speed gear when the wiper motor is working. Therefore, the second switching device can be used as a gear switch of the wiper motor.

[0038] Reference Figure 1 The controller further includes a first detection terminal, the first output terminal is connected to the third input terminal and is also connected to the first detection terminal. The controller detects the level of the first output terminal of the first switching device through the first detection terminal.

[0039] In this embodiment, by setting the first switching device and the second switching device, it is possible to conveniently control whether the wiper motor is working and the speed gear; by setting the first detection end, the controller can detect the level of the first output end of the first switching device, that is, the first level information, determine the fault information based on the first level information, and realize fault self-detection.

[0040] For example, for Figure 1 In the circuit shown, under normal circumstances, when the controller controls the wiper motor to enter the working state (rotation), the electrical levels of each end are as shown in Table 1.

[0041] Table 1

[0042]

[0043] Under normal circumstances, when the controller controls the wiper motor to exit the working state (not rotating), the electrical levels of each end are as shown in Table 2.

[0044] Table 2

[0045]

[0046] If a fault occurs in the wiper drive module or wiper system, the port levels or state combinations measured by the controller will deviate from those shown in Tables 1 and 2. Therefore, the controller can determine whether a fault occurs in the wiper drive module or wiper system by judging the combination of the above ports or states.

[0047] For example, when the first switch component is short-circuited, the level of the first output terminal will be pulled down to a low level due to the short circuit and grounding. When the controller controls the wiper motor to enter the working state (rotation), the level of each terminal is as shown in Table 3.

[0048] Table 3

[0049]

[0050] The situation shown in Table 3 deviates from that in Table 1, so the controller can determine that the fault information indicates that a fault has occurred, thereby implementing fault self-detection.

[0051] For example, when the first switch component is short-circuited, the level of the first output terminal will be pulled up to a high level due to the short circuit with the power supply. When the controller controls the wiper motor to exit the working state (not rotating), the level of each terminal is as shown in Table 4.

[0052] Table 4

[0053]

[0054] The situation shown in Table 4 deviates from that in Table 2, so the controller can determine that the fault information indicates that a fault has occurred, thereby implementing fault self-detection.

[0055] In this embodiment, refer to Figure 2 The controller is further provided with a second detection terminal, which is connected to the second output terminal. Specifically, the second detection terminal can be connected to any one of the second output terminals.

[0056] In this embodiment, the working principle of the second detection end is the same as the working principle of the first detection end, and the same as the principle in which the controller detects whether the first switching device has a short circuit or other fault through the first detection end. The controller can obtain the corresponding fault information by obtaining the level of the second detection end (second level information), such as whether the second switching device has a short circuit or other fault.

[0057] In this embodiment, refer to Figure 3 The automotive wiper drive module further includes a first gate circuit, wherein the input end of the first gate circuit is connected to the first output end and the first control end, respectively, and the output end of the first gate circuit is connected to the first detection end. Specifically, the first gate circuit can be an exclusive OR (XOR) gate circuit. When the level of the first output end of the first switching device is different from the level of the first control end, the first gate circuit outputs a high level to the first detection end; when the level of the first output end of the first switching device is the same as the level of the first control end, the first gate circuit outputs a low level to the first detection end.

[0058] In this embodiment, the principle of setting the first gate circuit is: referring to Tables 1 to 4, when the levels of the first control end and the first output end are different, it indicates that the fault information of the first switching device is normal; when the levels of the first control end and the first output end are the same, it indicates that the fault information of the first switching device is a short-circuit fault. Therefore, by setting the first gate circuit, the controller can determine that the fault information of the first switching device is normal when a high level is detected through the first detection end, and determine that the fault information of the first switching device is a short-circuit fault when a low level is detected through the first detection end. At this time, there is no need to judge and process the wiper drive instruction, thereby improving the judgment efficiency; the controller can use the first gate circuit to process the information carried by the levels of the first detection end and the first control end, and generate fault information accurately and quickly through hardware.

[0059] In this embodiment, an XOR gate circuit can also be used as the first gate circuit. Since the truth tables of the XOR gate and the XOR gate are opposite, the principle of using the XOR gate circuit as the first gate circuit is the same as that of using the XOR gate circuit as the first gate circuit. This also enables the controller to use the first gate circuit to process the information carried by the levels of the first output terminal and the first control terminal, and accurately and quickly generate fault information through hardware.

[0060] In this embodiment, refer to Figure 4 The automobile wiper drive module further includes a second gate circuit, the input end of which is respectively connected to each second output end, such as second output end 1 and second output end 2. Specifically, the second gate circuit can be an OR gate circuit. When at least one of the second output ends, such as second output end 1 and second output end 2, is at a high level, the second gate circuit outputs a high level to the second detection end. When all of the second output ends, such as second output end 1 and second output end 2, are at a low level, the second gate circuit outputs a low level to the second detection end.

[0061] In this embodiment, the principle of setting the second gate circuit is that: since the second switch device has a plurality of second output terminals [ Figure 4The figure shows that when the wiper motor has two gears, high speed gear and low speed gear, there are two second output terminals, a second output terminal 1 and a second output terminal 2. When the wiper motor has more speed gears, more second output terminals can be set. For example, the second output terminal 1 is connected to the first speed gear (low speed gear) adjustment terminal of the wiper motor, the second output terminal 2 is connected to the second speed gear (medium speed gear) adjustment terminal of the wiper motor, the second output terminal 1 is connected to the third speed gear (high speed gear) adjustment terminal of the wiper motor, etc. The position of any second output terminal in the second switching device is equivalent to the position of the first output terminal in the first switching device. The controller can detect whether any second output terminal is at a high level through a second gate circuit connected to the second detection terminal, so that the controller detects the fault information of the second switching device through the second detection terminal based on the principle of detecting the fault information of the first switching device through the first detection terminal. There is no need to judge and process the wiper drive instruction, thereby improving the judgment efficiency.

[0062] In this embodiment, refer to Figure 5 The automotive wiper drive module also includes a third gate circuit. The input of the third gate circuit is connected to the output of the second gate circuit and the second control terminal, respectively, and the output of the third gate circuit is connected to the second detection terminal. Specifically, the third gate circuit can be an exclusive OR (XOR) gate circuit. When the level of the output of the second gate circuit differs from the level of the second control terminal, the third gate circuit outputs a high level to the second detection terminal; when the level of the output of the second gate circuit matches the level of the second control terminal, the first gate circuit outputs a low level to the first detection terminal.

[0063] In this embodiment, the principle of setting the third gate circuit is: the same as the principle shown in Tables 1 to 4, when the levels of the second control end and the output end of the second gate circuit are different, it indicates that the fault information of the first switching device is normal, and when the levels of the second control end and the output end of the second gate circuit are the same, it indicates that the fault information of the second switching device is a short-circuit fault. Therefore, by setting the third gate circuit, the controller can determine that the fault information of the second switching device is normal when a high level is detected by the second detection end, and determine that the fault information of the second switching device is a short-circuit fault when a low level is detected by the second detection end. At this time, there is no need to judge and process the wiper drive instruction, thereby improving the judgment efficiency; the controller can use the third gate circuit to process the information carried by the output end of the second gate circuit and the level of the second control end, and generate fault information accurately and quickly through hardware.

[0064] In this embodiment, an XOR gate circuit can also be used as the third gate circuit. Since the truth tables of the XOR gate and the XOR gate are opposite, the principle of using the XOR gate circuit as the third gate circuit is the same as that of using the XOR gate circuit as the third gate circuit. This also enables the controller to use the third gate circuit to process the information carried by the output terminal of the second gate circuit and the level of the second control terminal, thereby accurately and quickly generating fault information through hardware.

[0065] In this embodiment, the controller can perform operations such as alarms based on the fault information. For example, when Figure 5 In the automobile wiper drive module shown, the first detection end and the second detection end both detect a low level, indicating that the fault information of the first switching device and the second switching device are normal, and the controller may not perform any operation; when the first detection end detects a high level, indicating that the fault information of the first switching device is a fault, the controller may generate an alarm message and display it through an indicator light or a display screen, thereby prompting the user to avoid using the automobile wiper system and to conduct troubleshooting or repair in a timely manner, which is conducive to reducing the expansion of the fault and ensuring the safety of automobile use. It can also enable the user to discover faults in the automobile wiper system in a timely manner, thereby avoiding the inability to use the automobile wipers when needed, and reducing the traffic risk of unclear vision due to the failure of the automobile wipers to be used normally.

[0066] In this embodiment, a wiper drive module, a wiper motor, and a wiper blade can be assembled together to form a wiper system. The wiper system has the same fault self-diagnosis features as the wiper drive module. The wiper system can be installed in a vehicle and, together with other vehicle components, form a complete vehicle. This complete vehicle has a wiper fault self-diagnosis feature and offers excellent safety.

[0067] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in this disclosure are only relative to the relative positional relationship of the components of the present disclosure in the accompanying drawings. The singular forms of "a" and "the" used in this disclosure are also intended to include the plural forms, unless the context clearly indicates otherwise. In addition, unless otherwise defined, all technical and scientific terms used in this embodiment have the same meaning as those generally understood by those skilled in the art. The terms used in the specification of this embodiment are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this embodiment includes any combination of one or more related listed items.

[0068] It should be understood that, although the present disclosure may adopt the term first, second, third etc. to describe various elements, these elements should not be limited to these terms.These terms are only used to distinguish the elements of the same type from each other.For example, without departing from the scope of the present disclosure, the first element may also be referred to as the second element, and similarly, the second element may also be referred to as the first element.The use of any and all examples or exemplary language ("for example", "such as" etc.) provided by the present embodiment is only intended to better illustrate embodiments of the present invention, and unless otherwise required, the scope of the present invention will not be limited.

[0069] It should be appreciated that embodiments of the present invention can be implemented or practiced by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer-readable memory. The methods can be implemented in a computer program using standard programming techniques - including a non-transitory computer-readable storage medium configured with a computer program, wherein the storage medium so configured causes the computer to operate in a specific and predefined manner - according to the methods and figures described in the specific embodiments. Each program can be implemented in a high-level procedural or object-oriented programming language to communicate with the computer system. However, if desired, the program can be implemented in assembly or machine language. In any case, the language can be a compiled or interpreted language. In addition, the program can be run on a programmed application-specific integrated circuit for this purpose.

[0070] In addition, the operations of the processes described in this embodiment may be performed in any suitable order, unless otherwise indicated in this embodiment or otherwise clearly contradicted by the context. The processes described in this embodiment (or variations and / or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) that is executed collectively on one or more processors, by hardware, or a combination thereof. A computer program includes multiple instructions that can be executed by one or more processors.

[0071] Furthermore, the method can be implemented in any type of computing platform that is operably connected to a suitable computer, including but not limited to a personal computer, a minicomputer, a mainframe, a workstation, a network or distributed computing environment, a separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, etc. Various aspects of the present invention can be implemented as machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, an optical read and / or write storage medium, RAM, ROM, etc., so that it can be read by a programmable computer, and when the storage medium or device is read by the computer, it responds to configure and operate the computer to perform the process described herein. In addition, the machine-readable code, or portions thereof, can be transmitted over a wired or wireless network. When such media includes instructions or programs that implement the above steps in conjunction with a microprocessor or other data processor, the invention of this embodiment includes these and other different types of non-transitory computer-readable storage media. When programmed according to the methods and techniques of the present invention, the present invention also includes the computer itself.

[0072] The computer program can be applied to input data to perform the functions of the present embodiment, thereby converting the input data to generate output data that is stored in a non-volatile memory. The output information can also be applied to one or more output devices such as a display. In a preferred embodiment of the present invention, the converted data represents a physical and tangible object, including a specific visual depiction of the physical and tangible object produced on the display.

[0073] The above are merely preferred embodiments of the present invention. The present invention is not limited to the aforementioned embodiments. As long as the technical effects of the present invention are achieved by the same means, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. Within the scope of protection of the present invention, various modifications and variations of the technical solutions and / or implementation methods may be made.

Claims

1. A car wiper drive module, characterized in that: The automobile wiper drive module includes: Controller; the controller is provided with a first control terminal, a second control terminal and a first detection terminal; the controller is provided with a second detection terminal; the second detection terminal is connected to the second output terminal; a first switching device; the first switching device having a first controlled terminal, a first input terminal, a second input terminal, and a first output terminal; the first controlled terminal being connected to the first control terminal; the first switching device being configured to selectively connect the first output terminal to the first input terminal or the second input terminal based on a signal received by the first controlled terminal; a second switching device; the second switching device comprises a second controlled terminal, a third input terminal, and a plurality of second output terminals; each of the second output terminals is respectively connected to a speed gear adjustment terminal of the wiper motor; the second switching device is configured to selectively connect the third input terminal and any of the second output terminals based on a signal received by the second controlled terminal; The first output terminal is connected to the third input terminal and to the first detection terminal; a first gate circuit; an input end of the first gate circuit is connected to the first output end and the first control end respectively, and an output end of the first gate circuit is connected to the first detection end; the controller is configured to obtain first level information through detection by the first detection end, obtain second level information through detection by the second detection end, and determine fault information based on the first level information and the second level information; a second gate circuit; an input end of the second gate circuit is connected to each of the second output ends; a third gate circuit; an input end of the third gate circuit is connected to the output end of the second gate circuit and the second control end respectively, and an output end of the third gate circuit is connected to the second detection end.

2. The automobile wiper drive module according to claim 1, characterized in that: The controller is configured to obtain first level information through detection at the first detection end, and determine fault information according to the first level information.

3. The automobile wiper drive module according to claim 1, characterized in that: The first input terminal is used to connect to a power supply, and the second input terminal is used to be grounded.

4. The automobile wiper drive module according to claim 1, characterized in that: The first gate circuit and the third gate circuit are XOR gate circuits, and the second gate circuit is an OR gate circuit.

5. A car wiper system, characterized in that: The automobile wiper system comprises: The automobile wiper drive module according to any one of claims 1 to 4; Wiper motor; the wiper motor is provided with a plurality of speed gear adjustment terminals, each of the speed gear adjustment terminals being respectively connected to the corresponding second output terminal of the automobile wiper drive module; Wiper; the wiper motor is used to drive the wiper.

6. An automobile, characterized in that: The automobile comprises the automobile wiper system according to claim 5.

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