Automobile windscreen wiper driving module, automobile windscreen wiper system and automobile

Abstract

The invention discloses an automobile windscreen wiper driving module, an automobile windscreen wiper system and an automobile, in the automobile windscreen wiper driving module, a first controlled end of a first switching device is connected with a first control end of a controller, and a first output end of the first switching device is connected with a third input end and is connected to a first detection end; the second output ends of the second switching device are used for being connected to the speed gear adjusting end of the wiper motor. The fault can be detected in time when the automobile windscreen wiper system has a short-circuit fault and the like, so that a user is prompted to avoid using the automobile windscreen wiper system and carry out troubleshooting or repair in time, fault expansion can be reduced, the use safety of an automobile is guaranteed, and the user experience is improved. In addition, the user can timely find faults of the automobile windscreen wiper system, so that the situation that the automobile windscreen wiper cannot be used when needing to be used is avoided, and the traffic risk that the visual field is not clear due to the fact that the automobile windscreen wiper cannot be used normally is reduced. The invention is widely applied to the technical field of automobiles.

Description

Technical Field

[0001] The 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] The wiper system is installed on the car to scrape off the rain, snow and other objects attached to the windshield in rainy and snowy weather to keep the driver's vision clear. The working principle of the wiper system is to use the wiper motor to drive the wiper (also known as wiper blades, wiper strips, wipers, etc.) to swing on the surface of the windshield to scrape. Since the wiper system contains moving parts and the working environment is also 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, thereby failing 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 the power supply circuit and other components of the entire vehicle, thereby posing a hidden danger of fire.

[0003] The current automobile 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 swing normally. However, this approach may cause the fault to expand, and 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 easy to expand, 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 windshield wiper drive module, the vehicle windshield 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 switch device; the first switch device is provided with a first controlled end, a first input end, a second input end and a first output end; the first controlled end is connected to the first control end; the first switch device is used to select to connect the first output end with the first input end or the second input end according to a signal received by the first controlled end;

[0008] A second switch device; the second switch device is provided with a second controlled end, a third input end and a plurality of second output ends; each of the second output ends is respectively used to be connected to a speed gear adjustment end of the wiper motor; the second switch device is used to selectively connect the third input end and any of the second output ends according to a signal received by the second controlled end;

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

[0010] Furthermore, the controller is used 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 source, 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; 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.

[0015] Further, the controller is used 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; the input end of the second gate circuit is respectively connected to each of the second output ends;

[0018] a third gate circuit; the input end of the third gate circuit is respectively connected to the output end of the second gate circuit and the second control end, and the 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] A wiper motor; the wiper motor is provided with a plurality of speed gear adjustment terminals, each of which is respectively connected to the corresponding second output terminal in 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, wherein the car includes the car wiper system of the embodiment.

[0025] The beneficial effects of the present invention are as follows: the automobile wiper drive module, the automobile wiper system and the automobile in the embodiments 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 troubleshooting or send the system for repair in time, which is beneficial to reduce the expansion of faults and ensure the safety of automobile use. It can also enable the user 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 caused by the inability to use the automobile wipers normally. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 2 It is a structural schematic diagram of a car wiper drive module provided with a second detection end in the embodiment;

[0028] Figure 3 It is a structural schematic diagram of a car wiper driving module provided with a first gate circuit in the embodiment;

[0029] Figure 4 It is a structural schematic diagram of a car 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 the 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 a wiper motor. Figure 1 shown.

[0032] Reference Figure 1 The automobile wiper driving module includes a controller, a first switch device and a second switch device. The controller is provided with a first control end and a second control end. The first control end is connected to a first controlled end of the first switch device, and the second control end is connected to a second controlled end of the second switch 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 for description. Figure 1 The automobile wiper driving module uses a low-side drive (LSD) mode. When the automobile wiper driving module sends a low-level control signal to the first controlled end (COL-) of the first switching device through the first control end, the coil in the first switching device will be energized, so that the first input end (connected to a power supply with a voltage of +V) of the first switching device is connected to the first output end; when the automobile wiper driving module sends a high-level control signal to the first controlled end (COL-) of the first switching device through the first control end, the coil in the first switching device will be de-energized, so that the second input end (grounded) of the first switching device is connected to the first output end.

[0035] Reference Figure 1 , when the first switch 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 switch device through the first control terminal, so that the second input terminal (grounded) of the first switch device is connected), the wiper motor does not work regardless of the on-off state of the first switch device.

[0036] Reference Figure 1 , when 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 turned on with 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, so that 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) is turned on. 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 a 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, the coil in the second switching device will be powered off, 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 a 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 work, 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 (and more second output terminals can be set) are used to control the speed gear of the wiper motor when it is working. Therefore, the second switching device can be used as a gear switch of the wiper motor.

[0038] Reference Figure 1 The controller is further provided with a first detection terminal, the first output terminal is connected to the third input terminal and is connected to the first detection terminal. The controller detects the level of the first output terminal of the first switch 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 according to 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] When the automobile wiper drive module or wiper system fails, the combination of port levels or states measured by the controller will deviate from the conditions shown in Table 1 and Table 2. Therefore, the controller can determine whether the automobile wiper drive module or wiper system fails 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 the fault information as a fault and implement 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, and implement fault self-detection.

[0055] In this embodiment, refer to Figure 2 The controller is further provided with a second detection terminal, and the second detection terminal is connected to the second output terminal. Specifically, the second detection terminal can be connected to any 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 a short circuit or other fault occurs in the first switching device 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 a short circuit or other fault occurs in the second switching device.

[0057] In this embodiment, refer to Figure 3 The automobile wiper drive module is further provided with a first gate circuit, the input end of the first gate circuit is respectively connected to the first output end and the first control end, 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 switch 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 switch 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 the present embodiment, the principle of setting the first gate circuit is: referring to Table 1-Table 4, when the levels of the first control terminal and the first output terminal are different, it indicates that the fault information of the first switch device is normal; when the levels of the first control terminal and the first output terminal are the same, it indicates that the fault information of the first switch device is a short circuit fault. Therefore, by setting the first gate circuit, the controller can determine that the fault information of the first switch device is normal when a high level is detected through the first detection terminal, and determine that the fault information of the first switch device is a short circuit fault when a low level is detected through the first detection terminal. 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 terminal and the first control terminal, and generate fault information accurately and quickly through hardware.

[0059] In this embodiment, an XOR gate circuit may 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 the principle of using the XOR gate circuit as the first gate circuit, and the controller can use the first gate circuit to process the information carried by the levels of the first output terminal and the first control terminal, and generate fault information accurately and quickly through hardware.

[0060] In this embodiment, refer to Figure 4 The automobile wiper drive module is further provided with a second gate circuit, and the input end of the second gate circuit is respectively connected to each second output end such as the second output end 1 and the second output end 2. Specifically, the second gate circuit can be an OR gate circuit, and when at least one second output end such as the second output end 1 and the second output end 2 is at a high level, the second gate circuit outputs a high level to the second detection end, and when all second output ends such as the second output end 1 and the 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, a high speed gear and a low speed gear, two second output terminals, a second output terminal 1 and a second output terminal 2, are provided. When the wiper motor has more speed gears, more second output terminals can be provided, 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, and 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 automobile wiper drive module is also provided with a third gate circuit. The input end of the third gate circuit is respectively connected to the output end of the second gate circuit and the second control end, and the output end of the third gate circuit is connected to the second detection end. Specifically, the third gate circuit can be an exclusive OR (XOR) gate circuit. When the level of the output end of the second gate circuit is different from the level of the second control end, the third gate circuit outputs a high level to the second detection end; when the level of the output end of the second gate circuit is the same as the level of the second control end, the first gate circuit outputs a low level to the first detection end.

[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 terminal and the output terminal of the second gate circuit are different, it indicates that the fault information of the first switch device is normal, and when the levels of the second control terminal and the output terminal of the second gate circuit are the same, it indicates that the fault information of the second switch device is a short circuit fault. Therefore, by setting the third gate circuit, the controller can determine that the fault information of the second switch device is normal when a high level is detected through the second detection terminal, and determine that the fault information of the second switch device is a short circuit fault when a low level is detected through the second detection terminal. 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 terminal of the second gate circuit and the level of the second control terminal, and generate fault information accurately and quickly through hardware.

[0064] In this embodiment, an XOR gate circuit may 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 the principle of using the XOR gate circuit as the third gate circuit, and the controller can 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, and generate fault information accurately and quickly through hardware.

[0065] In this embodiment, the controller can perform operations such as alarms based on the fault information. 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 switch device and the second switch 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 switch 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 troubleshoot or send the system for repair in a timely manner, which is conducive to reducing the expansion of the fault and ensuring the safety of the automobile. It also enables the user to promptly discover the fault in the automobile wiper system, 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.

[0066] In this embodiment, the automobile wiper drive module, the wiper motor and the wiper can be assembled together to form an automobile wiper system. The automobile wiper system has the functions of fault self-checking and the like that of the automobile wiper drive module. The automobile wiper system can be installed on an automobile and form an automobile complete vehicle together with other automobile components. Such an automobile complete vehicle has the function of automobile wiper fault self-checking and has good safety in use.

[0067] It should be noted that, unless otherwise specified, when a feature is referred to as "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 the present 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 the present disclosure are also intended to include the plural forms, unless the context clearly indicates other meanings. In addition, unless otherwise defined, all technical and scientific terms used in this embodiment have the same meaning as those generally understood by technicians in this technical field. The terms used in the specification of this embodiment are only for describing specific embodiments, not for limiting 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 term first, second, third etc. may be adopted to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish the same type of elements 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 may be implemented or enforced by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer-readable memory. The method may 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 drawings described in the specific embodiments. Each program may be implemented in a high-level procedural or object-oriented programming language to communicate with a computer system. However, if desired, the program may be implemented in assembly or machine language. In any case, the language may be a compiled or interpreted language. In addition, the program may be run on a programmed dedicated integrated circuit for this purpose.

[0070] In addition, the operations of the process 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 process 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 a code (e.g., executable instructions, one or more computer programs, or one or more applications) executed on one or more processors in common, by hardware or a combination thereof. A computer program includes a plurality of instructions that may be executed by one or more processors.

[0071] Further, 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 in 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, a RAM, a 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 configuring and operating the computer to perform the process described herein. In addition, the machine-readable code, or a portion thereof, can be transmitted via 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 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 only preferred embodiments of the present invention. The present invention is not limited to the above embodiments. As long as the technical effects of the present invention are achieved by the same means, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. Within the scope of protection of the present invention, its technical solutions and / or implementation methods may have various modifications and changes.

Claims

1. A car wiper drive module, characterized in that: The automobile wiper drive module comprises: Controller; the controller is provided with a first control terminal, a second control terminal and a first detection terminal; A first switch device; the first switch device is provided with a first controlled end, a first input end, a second input end and a first output end; the first controlled end is connected to the first control end; the first switch device is used to select to connect the first output end with the first input end or the second input end according to a signal received by the first controlled end; A second switch device; the second switch device is provided with a second controlled end, a third input end and a plurality of second output ends; each of the second output ends is respectively used to be connected to a speed gear adjustment end of the wiper motor; the second switch device is used to selectively connect the third input end and any of the second output ends according to a signal received by the second controlled end; The first output terminal is connected to the third input terminal and to the first detection terminal.

2. The automobile wiper drive module according to claim 1, characterized in that: The controller is used for obtaining first level information through detection at the first detection end, and determining 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 source, and the second input terminal is used to be grounded.

4. The automobile wiper drive module according to claim 1, characterized in that: The controller is provided with a second detection terminal; the second detection terminal is connected to the second output terminal.

5. The automobile wiper drive module according to claim 4, characterized in that: The automobile wiper drive module also includes: 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.

6. The automobile wiper drive module according to claim 4, characterized in that: The controller is used for obtaining first level information through detection at the first detection end, obtaining second level information through detection at the second detection end, and determining fault information according to the first level information and the second level information.

7. The automobile wiper drive module according to claim 5, characterized in that: The automobile wiper drive module also includes: a second gate circuit; the input end of the second gate circuit is respectively connected to each of the second output ends; a third gate circuit; the input end of the third gate circuit is respectively connected to the output end of the second gate circuit and the second control end, and the output end of the third gate circuit is connected to the second detection end.

8. The automobile wiper drive module according to claim 7, 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.

9. A car windshield wiper system, characterized in that: The automobile wiper system comprises: The automobile wiper drive module according to any one of claims 1 to 8; A wiper motor; the wiper motor is provided with a plurality of speed gear adjustment terminals, each of which is respectively connected to the corresponding second output terminal in the automobile wiper drive module; Wiper; the wiper motor is used to drive the wiper.

10. An automobile, characterized in that: The automobile comprises the automobile wiper system according to claim 9.

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