Washing nozzle heating control system and method and vehicle

Abstract

The invention provides a washing nozzle heating control system and method and a vehicle, and belongs to the technical field of washing nozzle control. The BCM is connected with a foresight camera, an outdoor temperature sensor, a washing nozzle, a wiper motor and a washing motor; the vehicle body controller BCM collects the smudginess degree of the front windshield through the foresight camera and collects the temperature outside the cab through the outdoor temperature sensor, and if the smudginess degree of the front windshield exceeds a set level and the temperature information outside the cab is lower than a set temperature threshold value, the vehicle body controller BCM starts to start the vehicle body controller BCM. And the washing nozzle is controlled to start heating till the temperature of the washing nozzle reaches the target temperature, and then the wiper motor is controlled to be matched with the washing motor to complete spraying and wiping actions. The heating and washing scraping actions of the washing nozzle are controlled by combining the vehicle state, the external temperature and the smudginess degree of the front windshield, and cleaning of the front windshield is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of washing nozzle control, and particularly relates to a control system, a method and a vehicle for heating a washing nozzle. Background Art

[0002] With the improvement of vehicle R & D technology level, the requirements for driving and riding experience of vehicles are getting higher and higher. As the main cleaning component of the vehicle's front windshield, the washing nozzle of the vehicle sprays cleaning agent to clean the front windshield of the vehicle. The current problem is that when the outdoor environmental temperature is relatively low, the washing nozzle of the vehicle is prone to icing. If the user wants to use the windshield wiper washing function at this time, the washing nozzle needs to be thawed first, which is very unfriendly to the user's experience of using the windshield wiper function and even threatens the driving safety of the driver and passengers. Therefore, when the user requests washing, a method for quickly thawing or pre-thawing the washing nozzle is required.

[0003] Currently, in related patents, there has appeared a way to pre-thaw the washing nozzle, mainly by determining the heating duration according to the real-time environmental temperature and the pre-stored mapping relationship, so that the cleaning liquid in the washing nozzle can not freeze, ensuring that the front windshield can be normally cleaned, effectively shortening the waiting time for the user to use the washing nozzle, and improving the overall use experience of the vehicle to a certain extent. However, this method controls the heating duration according to the current environmental temperature and cannot guarantee the temperature of the washing nozzle, easily resulting in overheating or underheating of the washing nozzle, leading to the risk of energy waste or the washing nozzle not being completely thawed. Summary of the Invention

[0004] In a first aspect, an embodiment of the present application provides a control system for heating a washing nozzle, including a body control module BCM; The body control module BCM is connected to a front view camera, an outdoor temperature sensor, a washing nozzle, a windshield wiper motor and a washing motor; The body control module BCM collects the dirt degree of the front windshield through the front view camera and collects the outdoor temperature outside the driver's cab through the outdoor temperature sensor. If the dirt degree of the front windshield exceeds the set level and the outdoor temperature information outside the driver's cab is lower than the set temperature threshold, it controls the washing nozzle to start heating and continues until the temperature of the washing nozzle reaches the target temperature, and then controls the windshield wiper motor and the washing motor to cooperate to complete the spraying and brushing actions.

[0005] Further, the body control module BCM is also connected to a combination meter; When the body control module BCM controls the washing nozzle to start heating, it notifies the combination meter to display a prompt message.

[0006] Further, an electric heating wire and a temperature control switch are provided in the washing nozzle; The first end of the temperature switch is connected to the first end of the electric heating wire, the second end of the temperature control switch is connected to the body control module BCM, and the second end of the electric heating wire is grounded; After the body control module BCM controls the washing nozzle to start heating, the temperature control switch detects the temperature inside the heating nozzle, and when the target temperature is reached, automatically disconnects the heating control of the washing nozzle by the body control module BCM.

[0007] Furthermore, it also includes a storage battery and a CAN bus; The front view camera and the combination instrument are both connected to the storage battery; The front view camera, the combination instrument, and the body control module BCM are all connected to the CAN bus to realize the communication between the body control module BCM and the front view camera and the combination instrument; The front view camera and the combination instrument are both connected to the body control module BCM through the CAN bus.

[0008] Furthermore, it also includes an engine compartment fuse box; The engine compartment fuse box is provided with a wiper power switch, a wiper high-speed switch, and a washing motor switch; The body control module BCM controls the washing motor to work and stop through the washing motor switch; The wiper high-speed switch includes a normally open switch and a normally closed switch; The body control module BCM controls the wiper motor to work and stop through the wiper power switch, and when the wiper motor is working, controls the wiper motor to work at low speed by controlling the normally open switch to disconnect and the normally closed switch to close, and controls the wiper motor to work at high speed by controlling the normally open switch to close and the normally closed switch to disconnect.

[0009] In a second aspect, the embodiment of the present application also provides a control method for washing nozzle heating, including the following steps: S1. The body control module BCM collects the temperature outside the driver's cab and the dirt degree of the front windshield in the vehicle running state; S2. The body control module BCM determines whether the dirt degree of the front windshield exceeds the set level and the temperature outside the driver's cab is lower than the set temperature threshold; If so, enter step S3; If not, return to step S1; S3. The body control module BCM controls the washing nozzle to start heating and continues until the temperature of the washing nozzle reaches the target temperature, and then controls the wiper motor and the washing motor to cooperate to complete the washing spray and brushing actions.

[0010] Furthermore, the specific steps of step S1 are as follows: S11. The body control module BCM determines the vehicle running state through its own power state; S12. The body control module (BCM) collects the outdoor temperature through an outdoor temperature sensor. S13. The body control module (BCM) collects the dirt level of the front windshield through a front view camera and determines the level of the dirt level. The specific steps of step S2 are as follows: S21. The body control module (BCM) determines whether the level of the dirt length of the front windshield exceeds a set level and whether the outdoor temperature is lower than a set temperature threshold. If both conditions are met, go to step S22. If at least one of the two conditions is not met, wait for a set time period and return to step S1. S22. The body control module (BCM) determines that there is a need to heat the washer nozzles and enters step S3.

[0011] Further, the specific steps of step S13 are as follows: S131. The front view camera collects an image of the front windshield and performs grayscale preprocessing using an internal image controller. S132. The internal image controller of the front view camera uses the grayscale image of the standard clean glass as a reference to compare the brightness of the grayscale image of the front windshield to identify the dirty area, and uses the Canny edge detection tool to determine the edge of the dirty area and the contour detection algorithm to determine the contour of the dirty area. S133. The internal image controller of the front view camera filters the size and shape of the contour of the dirty area, determines the effective contour of the dirty area, and calculates the contour length of the dirty area. S134. The internal image controller of the front view camera calculates the ratio of the contour length of the dirty area to the length of the front windshield and compares it with the ratio thresholds of each pre-set dirt level to determine the dirt level. S135. The internal controller of the front view camera provides the dirt level of the front windshield to the body control module (BCM). Specifically in step S21: S221. The body control module (BCM) determines the level threshold according to the driving scenario and real-time weather conditions. S222. The body control module (BCM) compares the dirt level of the front windshield with the level threshold. If it exceeds the level threshold, go to step S223. If it does not exceed the level threshold, wait for a set time period and return to step S1. S223. The body control module (BCM) determines whether the temperature in the cab exceeds the set temperature threshold. If so, go to step S3. If not, wait for a set time period and return to step S1.

[0012] Further, the specific steps of step S3 are as follows: S31. The body control module (BCM) controls the washer nozzle to start heating and notifies the combination meter to prompt that the washer nozzle heating function has been turned on; S32. The temperature control switch detects the temperature inside the washer nozzle; If the temperature inside the washer nozzle is less than the target temperature, go to step S33; If the temperature inside the washer nozzle is equal to the target temperature, go to step S34; S33. Wait for a set period of time and return to step S32; S34. The temperature switch disconnects the BCM's control of the washer nozzle heating; S35. The BCM responds to the disconnection signal, turns off the combination meter's prompt for the washer nozzle heating function to be turned on, controls the washer motor switch to close, the washer motor performs a washing spray once, then controls the wiper power switch to close, and the wiper high-speed switch maintains the normally open switch to be off and the normally closed switch to be on, and the wiper motor performs low-speed wiping three times.

[0013] In a third aspect, an embodiment of the present application further provides a vehicle applying the control system for heating a washer nozzle described in the first aspect.

[0014] From the above technical solutions, it can be seen that the present invention has the following advantages: In the control system, method and vehicle for heating a washer nozzle provided by the present application, the heating of the washer nozzle is controlled in combination with the vehicle state, external temperature, and dirtiness degree of the front windshield, and then a washing spray is performed once and the wiper performs low-speed wiping three times to ensure the cleanliness of the front windshield; by means of the built-in heating wire and temperature control switch in the washer nozzle, while ensuring the rapid heating of the washer nozzle, the temperature of the washer nozzle can also be prevented from being too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a schematic diagram of the control system for heating a washer nozzle of the present invention.

[0017] Figure 2 is a flowchart of the control method for heating a washer nozzle of the present invention.

[0018] Among them, 1 - Body Control Module (BCM); 2 - Front View Camera; 3 - Outdoor Temperature Sensor; 4 - Washer Nozzle; 5 - Wiper Motor; 6 - Washer Motor; 7 - Combination Meter; 8 - Battery; 9 - CAN Bus; 10 - First Fuse; 11 - Second Fuse; 12 - Engine Compartment Fuse Box; 13 - Wiper Power Switch; 14 - Wiper High-Speed Switch; 15 - Washer Motor Switch; 16 - Third Fuse; 17 - Fourth Fuse. Detailed Embodiment

[0019] In the following, a control system for heating a washer nozzle will be described in detail, and various embodiments of the present disclosure will be described more comprehensively. The present disclosure can have various embodiments, and adjustments and changes can be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present disclosure to the specific embodiments disclosed herein, but the present disclosure should be understood to cover all adjustments, equivalents, and / or alternative solutions that fall within the spirit and scope of the various embodiments of the present disclosure.

[0020] Exemplarily, with the continuous progress of vehicle R & D technology, drivers and passengers have put forward higher requirements for the driving and riding experience of vehicles. As a key component for cleaning the front windshield of a vehicle, the washer nozzle keeps the glass clean by spraying cleaning fluid. However, in a low-temperature environment, the washer nozzle is prone to icing, resulting in the user being unable to immediately use the wiper washing function and needing to thaw it first. This not only affects the user experience but also may pose a threat to driving safety.

[0021] To solve this problem, related patents have proposed a method for thawing the washer nozzle in advance. This method determines the heating duration based on the real-time environmental temperature and a preset mapping relationship, aiming to ensure that the cleaning fluid does not freeze, so as to be able to clean the front windshield normally. This method shortens the user's waiting time to a certain extent and improves the vehicle use experience. However, the limitation of this method is that it only controls the heating duration according to the current environmental temperature and cannot directly monitor the actual temperature of the washer nozzle. Therefore, there is a risk of overheating or underheating, which may lead to energy waste or the washer nozzle not being fully thawed.

[0022] In view of the above problems, this embodiment provides a control system for heating a washer nozzle. By integrating the Body Control Module (BCM), front view camera, outdoor temperature sensor, washer nozzle, wiper motor, and washer motor, it realizes the functions of intelligently controlling the heating of the washer nozzle and the wiper spraying and wiping according to the dirt degree of the front windshield and the outdoor temperature, improving driving safety and comfort.

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figure 1 The figure shows an example of a control system for heating a washing nozzle in a specific embodiment. The system includes a body control module (BCM) 1. The body control module (BCM) 1 is connected to a front view camera 2, an outdoor temperature sensor 3, a washing nozzle 4, a windshield wiper motor 5, and a washing motor 6. The body control module (BCM) 1 collects the dirt degree of the front windshield through the front view camera 2 and collects the outdoor temperature outside the vehicle through the outdoor temperature sensor 3. If the dirt degree of the front windshield exceeds the set level and the outdoor temperature information is lower than the set temperature threshold, it controls the washing nozzle 4 to start heating and continues until the temperature of the washing nozzle 4 reaches the target temperature, and then controls the windshield wiper motor 5 and the washing motor 6 to cooperate to complete the spraying and wiping actions. The body control module (BCM) 1 is the core control unit of the entire system, realizing the centralized control and coordination of the front view camera 2, the outdoor temperature sensor 3, the washing nozzle 4, the windshield wiper motor 5, and the washing motor 6, enabling the system to control the heating of the washing nozzle 4 and the spraying and wiping control according to the vehicle state and environmental information. The front view camera 2 can collect the dirt degree information of the front windshield in real time, providing a data basis for the system to judge whether it is necessary to heat the washing nozzle 4 and perform cleaning operations. The outdoor temperature sensor 3 can accurately obtain the outdoor temperature outside the vehicle. Combining with the dirt degree information, the heating of the washing nozzle 4 is only started when it is low temperature and the glass is dirty, avoiding unnecessary heating, and at the same time ensuring that the washing nozzle 4 can work normally when needed, saving energy and preventing icing from affecting cleaning. The washing nozzle 4 starts heating when the conditions are met, ensuring that the washing liquid can be smoothly ejected in a low-temperature environment, effectively cleaning the front windshield, ensuring a clear driving vision, and improving driving safety. The windshield wiper motor 5 and the washing motor 6 cooperate to complete the spraying and wiping actions, realizing the effective cleaning of the front windshield and improving the cleaning effect.

[0025] In this embodiment, through the collaborative work of components such as body control module (BCM) 1, front view camera 2, outdoor temperature sensor 3, windshield washer nozzle 4, windshield wiper motor 5, and washer motor 6, intelligent control of the heating of the windshield washer nozzle 4 and subsequent cleaning actions is achieved according to the vehicle's external environment and the actual conditions of the front windshield. This improves the intelligence level of the system, ensures clear driving vision and driving safety, and at the same time reasonably utilizes energy and reduces unnecessary energy consumption.

[0026] Furthermore, as a refinement and extension of the specific implementation manner of the above embodiment, in order to fully illustrate the specific implementation process in this embodiment, another control system for heating the windshield washer nozzle is provided. This system includes body control module (BCM) 1; The body control module (BCM) 1 is connected to a front view camera 2, an outdoor temperature sensor 3, a windshield washer nozzle 4, a windshield wiper motor 5, and a washer motor 6; The body control module (BCM) 1 collects the dirt degree of the front windshield through the front view camera 2 and collects the outdoor temperature outside the vehicle through the outdoor temperature sensor 3. If the dirt degree of the front windshield exceeds the set level and the outdoor temperature information is lower than the set temperature threshold, it controls the windshield washer nozzle 4 to start heating and continues until the temperature of the windshield washer nozzle 4 reaches the target temperature, and then controls the windshield wiper motor 5 and the washer motor 6 to cooperate to complete the spraying and wiping actions; The body control module (BCM) 1 is also connected to a combination meter 7; When the body control module (BCM) 1 controls the windshield washer nozzle 4 to start heating, it notifies the combination meter 7 to display a prompt message; It should be noted that when controlling the windshield washer nozzle 4 to start heating, notifying the combination meter 7 to display a prompt message enables the driver to timely understand the working state of the vehicle, improving driving convenience and user experience; An electric heating wire and a temperature control switch are provided inside the windshield washer nozzle 4; The first end of the temperature switch is connected to the first end of the electric heating wire, the second end of the temperature control switch is connected to the body control module (BCM) 1, and the second end of the electric heating wire is grounded; After the body control module (BCM) 1 controls the windshield washer nozzle 4 to start heating, the temperature control switch detects the temperature inside the windshield washer nozzle 4 and automatically disconnects the heating control of the body control module (BCM) 1 on the windshield washer nozzle 4 when the target temperature is reached; It should be noted that the electric heating wire realizes the heating of the windshield washer nozzle 4, and the temperature control switch detects the temperature inside the heating nozzle in real time and automatically disconnects the heating control of the body control module (BCM) 1 on the windshield washer nozzle 4 when the target temperature is reached, avoiding overheating of the windshield washer nozzle 4, protecting the windshield washer nozzle 4, extending its service life, and ensuring the safety and stability of the heating process at the same time; The control system for heating the windshield washer nozzle also includes a battery 8 and a CAN bus 9; The front view camera 2 and the combination instrument 7 are both connected to the battery 8; The combination instrument 7 is connected to the battery 8 through the first fuse 10, and the front view camera 2 is connected to the battery 8 through the second fuse 11; The front view camera 2, the combination instrument 7, and the body control module BCM 1 are all connected to the CAN bus 9 to realize the communication between the body control module BCM 1 and the front view camera 2 and the combination instrument 7; The front view camera 2 and the combination instrument 7 are both connected to the body control module BCM 1 through the CAN bus 9; It should be noted that the battery 8 provides a stable power supply for the front view camera 2 and the combination instrument 7, thereby ensuring the stable operation of the entire system; the CAN bus 9 realizes the communication between the body control module BCM 1 and the front view camera 2 and the combination instrument 7, enabling efficient and accurate data transmission between components, and improving the response speed and control accuracy of the system; The control system of the washer nozzle heater 4 further includes an engine compartment fuse box 12; The engine compartment fuse box 12 is provided with a wiper power switch 13, a wiper high-speed switch 14, and a washer motor switch 15; The body control module BCM 1 controls the washer motor 6 to work and stop through the washer motor switch 15; The wiper high-speed switch 14 includes a normally open switch and a normally closed switch; The body control module BCM 1 controls the wiper motor 5 to work and stop through the wiper power switch 13, and when the wiper motor 5 is working, controls the wiper motor 5 to work at low speed by controlling the normally open switch to be disconnected and the normally closed switch to be closed, and controls the wiper motor 5 to work at high speed by controlling the normally open switch to be closed and the normally closed switch to be disconnected; It should be noted that the wiper power switch 13, the wiper high-speed switch 14, and the washer motor switch 15 in the engine compartment fuse box 12 enable the body control module BCM 1 to control the working states of the wiper motor 5 and the washer motor 6; control the high-speed and low-speed working states of the wiper motor 5 through different switch combinations to meet the requirements in different cleaning scenarios and improve the cleaning efficiency and effect.

[0027] In an embodiment of the present invention, based on the wiper power switch 13, the wiper high-speed switch 14, and the washer motor switch 15, a possible embodiment will be given below to non-restrictively elaborate on its specific implementation scheme.

[0028] The washer motor switch 15 adopts a washer motor relay, and the washer motor relay includes a coil and a switch; The first end of the coil of the washer motor relay is connected to the first end of the switch of the washer motor relay and is connected with a third fuse 16; The other end of the third fuse 16 is connected to the storage battery 8; The second end of the coil of the washer motor relay is connected to the body control module BCM 1; The second end of the switch of the washer motor relay is connected to the washer motor 6, and the other end of the washer motor 6 is grounded; Similarly, the windshield wiper power switch 13 uses a windshield wiper power relay, and the windshield wiper power relay includes a coil and a switch; the windshield wiper high-speed switch 14 uses a windshield wiper high-speed relay, and the windshield wiper high-speed relay includes a coil and a switch; The switch of the windshield wiper high-speed relay includes a fixed terminal, a normally open terminal, and a normally closed terminal; The windshield wiper motor 5 includes a windshield wiper motor body, a high-speed signal terminal, a low-speed signal terminal, a return signal terminal, and a ground terminal; The windshield wiper motor body is provided with a low-speed terminal, a high-speed terminal, and a return signal connection terminal; The low-speed terminal of the windshield wiper motor body is connected with a first capacitor, and is connected to the low-speed signal terminal of the windshield wiper motor 5 and the normally closed terminal of the switch of the windshield wiper high-speed relay; The high-speed terminal of the windshield wiper motor body is connected with a second capacitor, and is connected to the high-speed signal terminal of the windshield wiper motor 5 and the normally open terminal of the switch of the windshield wiper high-speed relay; The other end of the first capacitor is connected with a controlled switch, and is connected to the return signal connection terminal of the windshield wiper motor body, the other end of the second capacitor, and the ground terminal of the windshield wiper motor 5, and is grounded; The other end of the controlled switch is connected to the return signal terminal of the windshield wiper motor body and the body control module BCM 1; The fixed terminal of the windshield wiper high-speed relay is connected to the first end of the switch of the windshield wiper power relay; The second end of the switch of the windshield wiper power relay is connected to the first end of the coil of the windshield wiper high-speed relay and the first end of the coil of the windshield wiper power relay, and is connected with a fourth fuse 17, and the fourth fuse 17 is connected to the storage battery 8; The second end of the coil of the windshield wiper power relay and the second end of the coil of the windshield wiper high-speed relay are both connected to the body control module BCM 1; The body control module BCM 1 is provided with a windshield wiper power control pin, a windshield wiper high-speed control pin, a windshield wiper return signal pin, and a washer output pin; The washer output pin is connected to the second end of the coil of the washer motor relay, the windshield wiper return signal pin is connected to the return signal terminal of the windshield wiper motor 5, the windshield wiper high-speed control pin is connected to the second end of the coil of the windshield wiper high-speed relay, and the windshield wiper power control pin is connected to the second end of the coil of the windshield wiper power relay; The body control module BCM 1 is further provided with a washer nozzle heating pin, a temperature signal pin, a ground pin, and a CAN bus pin; The heating pin of the washing nozzle is connected to the second end of the temperature switch of the washing nozzle 4; The outdoor temperature sensor 3 is provided with a signal terminal and a grounding terminal. The signal terminal of the outdoor temperature sensor 3 is connected to the temperature signal pin of the body control module BCM 1, and the grounding terminal of the outdoor temperature sensor 3 is connected to the grounding pin of the body control module BCM 1; The body control module BCM 1 is connected to the CAN bus 9 through the CAN bus pin.

[0029] As Figure 2 shown, the following is an embodiment of the control method for washing nozzle heating provided by the present disclosure. This method and the control system for washing nozzle heating in the above embodiments belong to the same inventive concept. For the details not described in detail in the embodiment of the control method for washing nozzle heating, reference can be made to the embodiment of the control system for washing nozzle heating above.

[0030] The method includes the following steps: S1. The body control module BCM collects the outdoor temperature of the driver's cab and the degree of dirt on the front windshield during the running state of the vehicle; It should be noted that the body control module BCM collects the outdoor temperature of the driver's cab and the degree of dirt on the front windshield during the running state of the vehicle, and obtains the state information of the vehicle external environment and the glass in real time, providing a data basis for subsequent washing nozzle heating control and washing and brushing actions; S2. The body control module BCM determines whether the degree of dirt on the front windshield exceeds the set level and the outdoor temperature of the driver's cab is lower than the set temperature threshold; If so, go to step S3; If not, return to step S1; It should be noted that the body control module BCM determines whether the degree of dirt on the front windshield exceeds the set level and the outdoor temperature of the driver's cab is lower than the set temperature threshold. Only when both conditions are met will subsequent operations be performed, avoiding unnecessary heating and cleaning actions, achieving precise control, and saving energy; S3. The body control module BCM controls the washing nozzle to start heating and continues until the temperature of the washing nozzle reaches the target temperature, and then controls the wiper motor and the washing motor to cooperate to complete the washing spray and brushing actions; It should be noted that the body control module BCM controls the washing nozzle to start heating and continues until the temperature of the washing nozzle reaches the target temperature, and then controls the wiper motor and the washing motor to cooperate to complete the washing spray and brushing actions, ensuring that the front windshield can be effectively cleaned when needed, guaranteeing the driving vision, and improving driving safety.

[0031] This embodiment can automatically adjust the actions of the washer nozzle heating and the windshield wiper spraying according to the vehicle running state, the dirt degree of the front windshield, and the outdoor temperature, improving driving safety and automation level.

[0032] Further, as a refinement and extension of the specific implementation manner of the above embodiment, in order to completely illustrate the specific implementation process in this embodiment, another control method for the washer nozzle heating is provided. The method includes the following steps: S1. The body control module (BCM) collects the outdoor temperature outside the driver's cab and the dirt degree of the front windshield in the vehicle running state. The specific steps of step S1 are as follows: S11. The BCM determines the vehicle running state through its own power state. Exemplarily, the vehicle running state is that the vehicle power state changes from OFF to ACC or ON. S12. The BCM collects the outdoor temperature outside the driver's cab through the outdoor temperature sensor. S13. The BCM collects the dirt degree of the front windshield through the front view camera and determines the level of the dirt degree. It should be noted that the BCM determines the vehicle running state through its own power state, which can accurately judge whether the system needs to start relevant functions, avoid unnecessary operations when the vehicle is not in the running state, and save energy; the BCM collects the outdoor temperature outside the driver's cab through the outdoor temperature sensor to provide temperature information for judging whether the washer nozzle needs to be heated; the front view camera collects the image of the front windshield, and determines the dirt level of the front windshield through image processing to provide a data basis for subsequent decisions. S2. The BCM judges whether the dirt degree of the front windshield exceeds the set level and the outdoor temperature is lower than the set temperature threshold. If so, go to step S3. If not, return to step S1. The specific steps of step S2 are as follows: S21. The BCM judges whether the level of the dirt length of the front windshield exceeds the set level and whether the outdoor temperature is lower than the set temperature threshold. If both are satisfied, go to step S22. If at least one of them is not satisfied, wait for the set time period and return to step S1. S22. The BCM determines that there is a need to heat the washer nozzle and enters step S3. It should be noted that the level threshold is determined according to the driving scenario and the real-time weather conditions to improve the judgment flexibility and conform to the actual situation. S3. The body control module (BCM) controls the washer nozzles to turn on the heating and continues until the temperature of the washer nozzles reaches the target temperature, and then controls the wiper motor and the washer motor to cooperate to complete the washing spray and wiping actions. The specific steps of step S3 are as follows: S31. The body control module (BCM) controls the washer nozzles to start heating and notifies the combination meter to prompt that the washer nozzle heating function has been turned on; It should be noted that the body control module (BCM) controls the washer nozzles to start heating and notifies the combination meter to prompt that the washer nozzle heating function has been turned on, enabling the driver to timely understand the vehicle status and ensuring the normal start of the heating function; S32. The temperature control switch detects the temperature inside the washer nozzles; If the temperature inside the washer nozzles is less than the target temperature, go to step S33; If the temperature inside the washer nozzles is equal to the target temperature, go to step S34; S33. Wait for a set period of time and return to step S32; S34. The temperature switch disconnects the body control module (BCM)'s control of the washer nozzle heating; It should be noted that the temperature control switch detects the temperature in real time and automatically disconnects the heating control when the target temperature is reached, protecting the washer nozzles and ensuring the safety of the heating process; S35. The body control module (BCM) responds to the disconnection signal, turns off the combination meter's prompt for the washer nozzle heating function to be turned on, controls the washer motor switch to close, the washer motor performs a washing spray once, then controls the wiper power switch to close, and the wiper high-speed switch maintains the normally open switch to be disconnected and the normally closed switch to be closed, and the wiper motor performs three low-speed wipes; It should be noted that after the washer nozzles are heated, the washer motor performs one spray and the wiper motor performs three wipes; It should be noted that the body control module (BCM) closes the combination meter prompt according to the disconnection signal of the temperature control switch and controls the washer motor and the wiper motor to complete the cleaning action, realizing the automatic execution of the entire cleaning process.

[0033] In an embodiment of the present invention, based on step S13, a possible embodiment will be given below to non-restrictively elaborate on its specific implementation scheme.

[0034] The specific steps of step S13 are as follows: S131. The front-view camera captures an image of the front windshield and uses the internal image controller for grayscale preprocessing; Specifically, the internal image controller of the front-view camera converts the color image captured by the front-view camera into a grayscale image using the following grayscale formula;

[0035] Calculate the grayscale value Gray of the RGB values (R n , G n , B n ) of each pixel point n in the color image, and then apply the calculated grayscale value Gray n to each pixel point n to obtain new RGB values (Gray n , Gray n , Gray n , Gray n ), thereby completing the grayscale conversion of the color image to obtain a grayscale image; It should be noted that by calculating the grayscale value of each pixel point, while retaining the main visual information of the image, the image data can be simplified, facilitating subsequent processing for denoising and edge detection; The internal image controller of the front view camera applies Gaussian blur filtering to the grayscale image for denoising to reduce noise interference in the image; S132. The internal image controller of the front view camera uses the grayscale image of the standard clean glass as a reference to compare the brightness of the grayscale image of the front windshield to identify the dirty area, and uses the Canny edge detection tool to determine the edge of the dirty area and the contour detection algorithm to determine the contour of the dirty area; It should be noted that the dirty area usually has a different color from the clean glass area. Reflected in the grayscale image, it is a brightness change. Therefore, the dirty area can be initially identified based on the different brightness; for example, by setting a brightness threshold as the grayscale image of the standard clean glass, the pixel points below this brightness threshold are considered to be part of the dirty area; Exemplarily, if the grayscale value of a certain pixel point in the image is , and the brightness threshold is T, the following formula is used to judge the dirtiness of this pixel point:

[0036] where 1 indicates that this pixel point is considered to be part of the dirty area, and 0 indicates that this pixel point belongs to the clean glass area; It should be noted that the above formula can be used to initially judge whether the pixel points in the image belong to the dirty area. By traversing all the pixel points in the image and applying the above formula, the pixel points in the dirty area are initially screened out, providing a basis for subsequent analysis of the dirty area; The Canny edge detection tool uses a Gaussian filter to smooth the grayscale image of the front windshield, and then calculates the image gradient, and detects the edge through non-maximum suppression and double-threshold methods; Specifically, the Canny edge detection tool uses the following two-dimensional Gaussian function to smooth the image:

[0037] Among them, (x, y) are the coordinates of the pixel point, is the standard deviation of the Gaussian distribution, and different selections result in different smoothing degrees; Determine the template size m*n and cover it on the grayscale image of the front windshield. For the grayscale values of the pixel points in the grayscale image of the front windshield Use to perform convolution to obtain the smoothed image :

[0038] Among them, m is the size of the template in the x direction, and y is the size of the template in the y direction; It should be noted that the above formula is used to convolve the two-dimensional Gaussian function with the image to perform convolution operation to obtain the smoothed image ; During the operation, with each pixel point (x, y) as the center, the Gaussian filter template composed of is covered on the image, and the pixel points in the template and the corresponding image pixel points are weighted and summed. The specific weights are determined by the Gaussian function values, so as to realize the smoothing process of the image; Through convolution operation, the smoothing characteristics of the Gaussian function are applied to each pixel point of the image, effectively removing noise while maintaining the edges and important features of the image; Use the Sobel operator as the convolution kernel to calculate the partial derivatives in the x direction and y direction of the grayscale image of the front windshield:

[0039]

[0040] Among them is the gradient in the x direction, is the gradient in the y direction; It should be noted that calculates the gradient in the x direction, which reflects the grayscale change rate of the image in the horizontal direction; calculates the gradient in the y direction, which reflects the grayscale change rate of the image in the vertical direction; By calculating the gradients in these two directions, the direction and intensity of the edges in the image can be determined, because edges are usually accompanied by large grayscale changes, that is, large gradient values; Then use the following formula to calculate the magnitude G and direction of the image gradient :

[0041]

[0042] It should be noted that G is the magnitude of the image gradient, which synthesizes the gradients in the x direction and the y direction information, reflecting the intensity of the gray-scale change at each pixel point in the image. The larger the magnitude, the greater the likelihood of an edge at that pixel point; is the direction of the image gradient, = determines the orientation of the edge, and the angle value calculated through the arctangent function can classify the edge direction into different angle intervals, which helps with subsequent edge analysis and processing; Traverse each pixel point in the image, compare the gradient magnitude of this pixel point with the gradient magnitudes of two adjacent pixel points along the gradient direction. If the gradient magnitude of this pixel point is not a local maximum, then set its gradient magnitude to 0, that is, suppress non-maximum points; Set two gradient thresholds, a high threshold and a low threshold , if the gradient magnitude of a pixel point satisfies , the pixel point is determined to be an edge point; while pixel points are excluded; as for pixel points, if they are connected to the already determined edge points, they are considered edge points, otherwise they are excluded; Use the Hough transform contour detection algorithm to detect the shapes and contours in the image; S133. The internal image controller of the front-view camera filters the size and shape of the contour of the dirty area, determines the effective contour of the dirty area, and calculates the contour length of the dirty area; S134. The internal image controller of the front-view camera calculates the ratio of the contour length of the dirty area to the length of the front windshield, and compares it with the ratio thresholds of each preset dirt level to determine the dirt level; According to the ratio of the contour length of the dirty area to the total length of the front windshield, the dirt degree is divided into different levels; for example, when the proportion of the contour length of the dirty area in the total length of the front windshield is greater than a certain threshold, such as 20%, the dirt degree can be considered as level 2 or higher; S135. The internal controller of the front-view camera provides the dirt level of the front windshield to the body controller BCM.

[0043] In an embodiment of the present invention, based on step S21, a possible embodiment will be given below to non-restrictively elaborate on its specific implementation scheme.

[0044] Specifically in step S21 as follows: S221. The body controller BCM determines the level threshold according to the driving scenario and real-time weather conditions; Exemplarily, the level threshold can be dynamically adjusted according to different driving scenarios, such as urban roads or highways and weather conditions; for example, on highways, due to the relatively high vehicle speed, higher requirements are placed on the clarity of the windshield, and the threshold for dividing the dirt level can be appropriately lowered; S222. The body control module BCM compares the dirt level of the front windshield with the level threshold; If it exceeds the level threshold, proceed to step S223; If it does not exceed the level threshold, wait for a set time period and return to step S1; S223. The body control module BCM determines whether the temperature in the cab exceeds the set temperature threshold; If so, proceed to step S3; If not, wait for a set time period and return to step S1; It should be noted that the level threshold is flexibly determined according to different situations and multiple judgments are made to ensure that the washing nozzle heating and cleaning actions are only activated when truly needed, achieving precise control and avoiding waste of resources.

[0045] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0046] The vehicle provided by the present invention will be described below. The vehicle described below can be mutually corresponding and referred to the control system and method for washing nozzle heating described above.

[0047] An embodiment of the present invention further provides a vehicle, including the control system for washing nozzle heating as described in the above embodiment; It should be noted that this embodiment improves the intelligent level and driving safety of the vehicle. By intelligently controlling the washing nozzle heating and cleaning actions, the driver's field of vision is guaranteed, and the driving experience of users is improved.

[0048] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control system for washing nozzle heating, characterized in that: Including body controller BCM; The body controller BCM is connected to the front view camera, outdoor temperature sensor, washing nozzle, wiper motor and washing motor; The body controller BCM collects the degree of dirtiness of the front windshield through the front-view camera and the outdoor temperature of the cab through the outdoor temperature sensor. If the degree of dirtiness of the front windshield exceeds the set level and the outdoor temperature information of the cab is lower than the set temperature threshold, the washing nozzle is controlled to start heating and continue until the washing nozzle temperature reaches the target temperature, and then the wiper motor and the washing motor are controlled to cooperate to complete the spraying and scraping actions.

2. The control system for washing nozzle heating according to claim 1, characterized in that: The body controller BCM is also connected to the instrument cluster; While controlling the washing nozzle to start heating, the body controller BCM notifies the instrument cluster to display a prompt message.

3. The control system for washing nozzle heating according to claim 2, characterized in that: The washing nozzle is equipped with an electric heating wire and a temperature control switch; The first end of the temperature switch is connected to the first end of the electric heating wire, the second end of the temperature control switch is connected to the body controller BCM, and the second end of the electric heating wire is grounded; After the body controller BCM controls the washing nozzle to start heating, the temperature control switch detects the temperature inside the heating nozzle and automatically disconnects the body controller BCM from controlling the heating of the washing nozzle when the target temperature is reached.

4. The control system for washing nozzle heating according to claim 2, characterized in that: It also includes batteries and CAN bus; The front-view camera and instrument cluster are both connected to the battery; The front view camera, instrument cluster and body controller BCM are all connected to the CAN bus to achieve communication between the body controller BCM and the front view camera and instrument cluster; The front view camera and instrument cluster are connected to the body controller BCM via the CAN bus.

5. The control system for washing nozzle heating according to claim 2, characterized in that: Also includes the cabin fuse box; The cabin fuse box is equipped with a wiper power switch, wiper high-speed switch and washing motor switch; The body controller BCM controls the operation and stop of the washing motor through the washing motor switch; The wiper high-speed switch includes a normally open switch and a normally closed switch; The body controller BCM controls the start and stop of the wiper motor through the wiper power switch. When the wiper motor is working, it controls the wiper motor to work at low speed by controlling the normally open switch to open and the normally closed switch to close, and controls the wiper motor to work at high speed by controlling the normally open switch to close and the normally closed switch to open.

6. A method for controlling the heating of a washing nozzle, characterized in that: The steps include: S1. The body controller BCM collects the outdoor temperature of the cab and the dirtiness of the front windshield when the vehicle is running; S2. The body controller BCM determines whether the dirtiness of the front windshield exceeds the set level and the temperature outside the cab is lower than the set temperature threshold; If yes, go to step S3; If not, return to step S1; S3. The body controller BCM controls the washing nozzle to start heating and continues until the washing nozzle temperature reaches the target temperature, and then controls the wiper motor and the washing motor to cooperate to complete the washing spray and scraping action.

7. The control method for heating the washing nozzle according to claim 6, characterized in that: The specific steps of step S1 are as follows: S11. The body controller BCM determines the vehicle operating status through its own power supply status; S12. The body controller BCM collects the outdoor temperature of the cab through the outdoor temperature sensor; S13. The body controller BCM collects the dirtiness of the front windshield through the front-view camera and determines the level of dirtiness; The specific steps of step S2 are as follows: S21. The body controller BCM determines whether the dirt length of the front windshield exceeds the set level and whether the outdoor temperature of the cab is lower than the set temperature threshold; If both conditions are met, proceed to step S22; If at least one of the two is not satisfied, wait for a set time period and return to step S1; S22. The body controller BCM determines that there is a need to heat the washing nozzle and enters step S3.

8. The method for controlling the heating of the washing nozzle according to claim 7, characterized in that: The specific steps of step S13 are as follows: S131. The front-view camera captures the image of the front windshield and uses the internal image controller for grayscale preprocessing; S132. The image controller inside the front camera uses the grayscale image of the standard clean glass as a reference, compares the brightness of the grayscale image of the front windshield to identify the dirty area, and uses the Canny edge detection tool to determine the edge of the dirty area and uses the contour detection algorithm to determine the contour of the dirty area; S133. The image controller inside the front-view camera screens the size and shape of the contour of the dirty area, determines the effective contour of the dirty area and calculates the contour length of the dirty area; S134. The image controller inside the front-view camera calculates the ratio of the contour length of the dirty area to the length of the front windshield, and compares it with the preset ratio thresholds of each dirt level to determine the dirt level; S135. The internal controller of the front camera provides the dirt level of the front windshield to the body controller BCM; The specific steps in step S21 are as follows: S221. The body controller BCM determines the level threshold according to the driving scenario and real-time weather conditions; S222. The body controller BCM compares the dirt level of the front windshield with the level threshold; If the level threshold is exceeded, proceed to step S223; If the level threshold is not exceeded, wait for a set period of time and return to step S1; S223. The body controller BCM determines whether the cabin temperature exceeds the set temperature threshold; If yes, go to step S3; If not, wait for a set period of time and return to step S1.

9. The control method for heating the washing nozzle according to claim 7, characterized in that: The specific steps of step S3 are as follows: S31. The BCM controls the washer nozzle to start heating and notifies the instrument cluster to remind that the washer nozzle heating function is turned on; S32. The temperature control switch detects the temperature inside the washing nozzle; If the temperature inside the washing nozzle is lower than the target temperature, proceed to step S33; If the temperature inside the washing nozzle is equal to the target temperature, proceed to step S34; S33. Wait for the set time period and return to step S32; S34. The temperature switch disconnects the body controller BCM from controlling the washing nozzle heating; S35. The body controller BCM responds to the disconnect signal, turns off the instrument cluster's prompt for turning on the washing nozzle heating function, and controls the washing motor switch to close. The washing motor performs a washing spray once, then controls the wiper power switch to close, and the wiper high-speed switch to maintain the normally open switch disconnected and the normally closed switch closed, and the wiper motor performs low-speed wiping three times.

10. A vehicle, characterized in that: A control system for washing nozzle heating using the method described in any one of claims 1 to 5.

Images