Rain sensor, vehicle, and vehicle control method

Abstract

This application discloses a rain sensor, a vehicle, and a vehicle control method, belonging to the field of vehicle electronics technology. The rain sensor, located on the vehicle, comprises a detection capacitor and a control component. The control component includes a capacitance detection chip connected to the detection capacitor and configured to determine rainfall based on changes in the capacitance of the detection capacitor. The detection capacitor is located outside the vehicle's windshield. This rain sensor avoids the false detection issues associated with infrared photoelectric rain sensors, improving the driving experience for drivers and passengers.

Description

Technical Field

[0001] The present application relates to the field of vehicle electronic technology, and in particular to a rain sensor, a vehicle, and a vehicle control method. Background Art

[0002] Currently, more and more vehicles are equipped with automatic wipers. Automatic wipers can automatically adjust the start, stop and swing frequency of the wipers according to the amount of rain, meeting the needs of drivers and passengers when driving in rainy days.

[0003] In the related art, infrared photoelectric rain sensors are primarily used to monitor rainfall and determine the amount of rain. These sensors include a transmitting circuit and a receiving circuit. The transmitting circuit emits infrared light toward the windshield, which is then reflected by the windshield and received by the receiving circuit. When raindrops form on the outer surface of the windshield, the presence of the raindrops affects the direction of the infrared light's reflection. Therefore, the amount of rain can be determined based on the intensity of the infrared light received by the receiving circuit.

[0004] However, since infrared photoelectric rain gauges use infrared light, they are easily affected by ambient infrared light, resulting in false detections and affecting the driving experience of drivers and passengers. Summary of the Invention

[0005] In view of this, the present application provides a rain sensor, a vehicle, and a vehicle control method, which can avoid the problem of false detection existing in infrared photoelectric rain sensors and improve the driving experience of drivers and passengers.

[0006] Specifically, the following technical solutions are included:

[0007] In a first aspect, an embodiment of the present application provides a rain sensor, comprising:

[0008] The control component includes a capacitance detection chip, which is connected to the detection capacitor and is used to determine the rainfall value according to the change of the capacitance value of the detection capacitor;

[0009] The detection capacitor is located on the outside of the windshield of the vehicle.

[0010] In some embodiments, the detection capacitor is a parallel plate capacitor, which includes two flexible plates arranged opposite to each other, each of which has a metal electrode.

[0011] In some embodiments, the area of ​​the flexible plate is 10×15 mm 2 .

[0012] In some embodiments, the control component further includes a communication module, and the communication module is connected to the capacitance detection chip.

[0013] In some embodiments, the communication module is used to send the rainfall value determined by the capacitance detection chip to the vehicle body controller via wireless and / or wired means.

[0014] In some embodiments, the control component further includes a power supply, and the power supply is connected to the capacitance detection chip.

[0015] In some embodiments, the control component includes a housing, and the capacitance detection chip, the power supply, and the communication module are all located in the housing.

[0016] In a second aspect, an embodiment of the present application provides a vehicle, comprising a rain sensor, a body controller, and a wiper as described in the first aspect above, wherein the rain sensor and the wiper are both connected to the body controller.

[0017] In some embodiments, the vehicle further includes windows and a sunroof, and both the windows and the sunroof are connected to the vehicle body controller.

[0018] In a third aspect, an embodiment of the present application provides a vehicle control method, which is applied to the vehicle body controller of the vehicle according to the second aspect above, and includes:

[0019] Obtaining the rainfall value measured by the rain sensor;

[0020] Based on the rainfall value measured by the rain sensor, the working position of the wiper is determined and the vehicle windows and the sunroof are controlled to be closed.

[0021] The rain sensor provided in the embodiments of the present application places a detection capacitor on the outside of the vehicle's windshield. This allows rain to fall onto the detection capacitor on the outside of the windshield, causing the capacitance of the detection capacitor to change due to the difference in dielectric constant between the rain and air. The capacitance detection chip can then determine the rainfall value based on the change in the capacitance of the detection capacitor. Furthermore, because the detection capacitor can detect rainfall without the need for additional light, compared to related infrared photoelectric rain sensors, the problem of false detection caused by existing infrared photoelectric rain sensors can be effectively avoided, improving the driving experience for drivers and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A schematic structural diagram of a rain sensor provided in an embodiment of the present application;

[0024] Figure 2 A schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of a detection capacitor in a rain sensor provided in an embodiment of the present application;

[0026] Figure 4 A flowchart of a vehicle control method provided in an embodiment of the present application.

[0027] The reference numerals in the figures represent respectively:

[0028] 1-Rain sensor, 11-Detection capacitor, 111-Flexible plate, 112-Metal electrode, 12-Control component, 121-Capacitance detection chip, 122-Communication module, 123-Power supply, 124-Casing;

[0029] 2- Windshield;

[0030] 3-Wipers;

[0031] 4- Car windows;

[0032] 5-Skylight.

[0033] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those skilled in the art.

[0037] The advent of manual windshield wipers ensures clear vision for drivers and passengers in rainy weather while also meeting their need for clean windshields. Rainfall can fluctuate constantly. Manual wipers require drivers and passengers to manually adjust the wiper position according to the amount of rain, ensuring a clear view of the windshield. However, the wiper position must be manually adjusted to meet the rainfall. Failure to adjust the wiper position promptly can negatively impact the driving experience, especially when the rainfall intensity and wiper frequency do not match. When rainfall is heavy and the wiper frequency is low, rainwater accumulates on the windshield, obstructing the driver's view. When rainfall is light and the wiper frequency is high, friction between the wipers and the windshield can lead to damage, wear, and irritation. This noise can also distract the driver, disrupting the driving experience and potentially causing accidents.

[0038] With the development of the automotive industry and the improvement of people's living standards, people's requirements for the comfort, convenience, and intelligence of vehicle products are constantly increasing. Currently, manual wipers are gradually being replaced, and more and more vehicles are equipped with automatic wipers. Automatic wipers can adjust the start, stop, and oscillation frequency of the wipers according to the amount of rain. This allows drivers and passengers on rainy days to avoid having to worry about starting and stopping the wipers, and there is no need to manually adjust the wiper oscillation frequency according to the amount of rain. To achieve automatic wiper oscillation, a rain sensor is required to detect and transmit the rainfall, thereby realizing automatic adjustment of the wipers. Therefore, exploring the accuracy of the rainfall value measured by the rain sensor is particularly important for the realization of automatic wipers.

[0039] At present, common rain sensors mainly include flow type rain sensors, piezoelectric rain sensors and infrared photoelectric rain sensors.

[0040] Among them, the flow type rain sensor includes relatively arranged flow detection electrode plates. When rain falls on the flow detection electrode plates, the flow detection electrode plates are attracted and turned on under the action of rain, thereby controlling the vehicle wipers connected to the flow type rain sensor to swing.

[0041] The piezoelectric rain sensor consists of a piezoelectric element, a vibration plate and an amplifier circuit. When rain falls on the vibration plate, the vibration plate bends and vibrates at its inherent vibration frequency under the impact of the rain, and transmits the vibration to the piezoelectric element inside. The piezoelectric element can vibrate according to the strength of the raindrops, and uses the piezoelectric effect to convert the mechanical vibration into an electrical signal. The electrical signal is amplified by the amplifier circuit to determine the rainfall value.

[0042] An infrared photoelectric rain sensor consists of a transmitting circuit and a receiving circuit. The transmitting circuit emits infrared light toward the windshield, where it is reflected by the windshield and received by the receiving circuit. When raindrops are present on the windshield's outer surface, they affect the direction of the infrared light's reflection. Therefore, the intensity of the infrared light received by the receiving circuit can be used to determine the amount of rainfall. During rain, raindrops on the windshield reflect the infrared light from the transmitting circuit away from the receiving circuit, resulting in less infrared light being received by the receiving circuit and larger variations in the detected light intensity. This variation in light intensity increases with greater rainfall. When it's not raining, the windshield reflects all the infrared light from the transmitting circuit back to the receiving circuit, minimizing the variation in the detected light intensity.

[0043] Currently, infrared photoelectric rain sensors are primarily used in vehicles to monitor rainfall and determine the amount of rainfall. However, because the transmitting circuit of infrared photoelectric rain sensors emits infrared light, it is easily interfered with by ambient infrared light. This can lead to inaccurate detection results, affecting the driving experience of vehicle drivers and passengers.

[0044] In view of this, an embodiment of the present application provides a rain sensor. The rain sensor 1 is located on a vehicle, which can effectively avoid the problem of false detection existing in the infrared photoelectric rain sensor in the prior art and improve the driving experience of the driver and passengers.

[0045] Figure 1 This is a structural diagram of a rain sensor provided in an embodiment of the present application. Figure 2 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application is shown in FIG. Figure 1 and Figure 2 The rain sensor 1 includes: a detection capacitor 11 and a control component 12.

[0046] The control component 12 includes a capacitance detection chip 121 , which is connected to the detection capacitor 11 . The capacitance detection chip 121 is used to determine the rainfall value according to the change of the capacitance value of the detection capacitor 11 .

[0047] The detection capacitor 11 is located on the outside of the windshield 2 of the vehicle.

[0048] It should be noted that the detection capacitor 11 can be located on the upper side, left side or right side of the windshield 2, that is, the location where it is set will not be scraped by the wiper 3. Figure 2 ,exist Figure 2 In the example shown, the detection capacitor 11 is located on the left side of the front windshield.

[0049] Optionally, the detection capacitor 11 is located on the outside of the rear windshield 2 of the vehicle, which can effectively prevent the driver from mistakenly triggering the detection capacitor 11 to measure the rainfall value when using glass water to clean the front windshield.

[0050] The working principle of the rain sensor provided in the embodiment of the present application is as follows:

[0051] When rain falls on the detection capacitor 11 located on the outside of the windshield 2, the capacitance value of the detection capacitor 11 will change due to the difference in the dielectric constant of rainwater and the dielectric constant of air. The capacitance detection chip 121 can determine the rainfall value based on the change in the capacitance value of the detection capacitor 11.

[0052] It is understandable that on rainy days, since the dielectric constant of rainwater is greater than that of air, when rainwater falls on the detection capacitor 11 of the rain sensor 1, the capacitance value of the detection capacitor 11 will increase. The capacitance detection chip 121 of the rain sensor 1 can determine the rainfall value based on the change in the capacitance value of the detection capacitor 11. Specifically, the more rainwater that falls on the detection capacitor 11 of the rain sensor 1, the greater the rainfall, and the greater the increase in the capacitance value of the detection capacitor 11, thereby causing the capacitance detection chip 121 to determine the rainfall value.

[0053] Therefore, the rain sensor provided in the embodiment of the present application can achieve detection by utilizing the detection capacitor 11 without using additional light irradiation. Compared with the infrared photoelectric rain sensor in the related technology, it can effectively avoid the problem of false detection caused by the infrared photoelectric rain sensor in the prior art, and improve the driving experience of the driver and passengers.

[0054] The structure of the rain sensor provided in the embodiment of the present application is further described below:

[0055] The detection capacitor 11 is used to generate a change in capacitance value according to the situation of rain falling on it, and is a key component of the rain sensor provided in the embodiment of the present application.

[0056] The detection capacitor 11 has an initial capacitance value. When rain falls on the detection capacitor 11, the capacitance value of the detection capacitor 11 changes, that is, it is no longer the initial capacitance value.

[0057] The detection capacitor 11 is directly exposed to the external environment and can be in direct contact with the external environment. That is, when it rains, rainwater can directly drip onto the detection capacitor 11 .

[0058] Figure 3 This is a schematic diagram of the structure of a detection capacitor in a rain sensor provided in an embodiment of the present application, see Figure 3 The detection capacitor 11 may be a parallel plate capacitor. By configuring the detection capacitor 11 as a parallel plate capacitor structure, the structure of the detection capacitor 11 is simplified and easy to configure.

[0059] Continue to see Figure 3 The parallel plate capacitor includes two flexible plates 111 arranged opposite each other, each having a metal electrode 112. The metal electrode 112 is located on the side of the flexible plate 111 away from the other flexible plate 111. This arrangement can reduce the mass of the detection capacitor 11, prevent deformation or expansion during use, and facilitate installation and testing.

[0060] In some embodiments, a parallel plate capacitor can be prepared by: respectively covering two flexible films with metal electrodes, and etching the metal electrodes to obtain two flexible films with etched metal electrodes; then, the two flexible films with etched metal electrodes are used as two flexible plates of a parallel plate capacitor, and the etched metal electrodes are used as the metal electrodes of the parallel plate capacitor.

[0061] It should be noted that the two flexible films need to be homogeneous and flat, and free of bubbles, so as not to affect the test results and detection sensitivity.

[0062] In some embodiments, the metal electrode 112 may be made of copper.

[0063] In some embodiments, the operating instrument for etching the metal electrode may be an etcher.

[0064] In some embodiments, the etched metal electrode has an electrode pattern, which facilitates the detection of the detection capacitor 11 and the conduction of signals.

[0065] In the related art, due to the small size of infrared photoelectric rain sensors, the area that can be detected by the sensors is small, wherein the detection area is generally less than 100mm.2 Especially when the rainfall is light, the infrared light emitted by the transmitting circuit is difficult to illuminate the area with raindrops, resulting in low sensitivity of the infrared photoelectric rain sensor.

[0066] In order to solve the problems existing in the related art, in some embodiments, the area of ​​the flexible plate 111 can be 10×15 mm 2 , which makes the detection area of ​​the detection capacitor 11 larger, especially compared with the area of ​​the infrared photoelectric rain sensor in the prior art, which can ensure that the detection capacitor 11 is fully in contact with the rainwater, thereby improving the detection sensitivity of the rain sensor provided in the embodiment of the present application.

[0067] The control component 12 is used to determine the rainfall value and is the core component of the rain sensor 1 provided in the embodiment of the present application.

[0068] The control component 12 includes a capacitance detection chip 121, which is used to determine the rainfall value based on the change in the capacitance value of the detection capacitor 11. It can be understood that the change in the capacitance value is within a preset range.

[0069] Since the capacitance change of the detection capacitor 11 is generally small, it is difficult to directly measure the capacitance value. Therefore, the capacitance value needs to be converted into an electrical signal and amplified to facilitate the capacitance detection chip 121 to determine the rainfall value. Therefore, the capacitance detection chip 121 may include a measurement circuit, a shaping circuit, a filtering circuit, and an amplification circuit connected in sequence. The measurement circuit is used to measure the capacitance change, the shaping circuit is used to convert the capacitance change into an electrical signal, the filtering circuit is used to eliminate interference signals, and the amplification circuit is used to amplify the electrical signal into an electrical signal that is easy to detect.

[0070] In some embodiments, the capacitance detection chip 121 has a built-in temperature compensation program and a humidity compensation program. The temperature compensation program is used to reduce the impact of temperature changes on the rain sensor 1, and the humidity compensation program is used to reduce the impact of humidity changes on the rain sensor 1.

[0071] In addition to the capacitance detection chip 121, see Figure 1 The control component 12 further includes a communication module 122 , which is connected to the capacitance detection chip 121 for transmitting control signals.

[0072] In some embodiments, the communication module 122 is used to send the rainfall value determined by the capacitance detection chip 122 to the vehicle body controller via wireless and / or wired means.

[0073] It can be understood that, since the rain sensor provided in the embodiment of the present application is applied to a vehicle, the communication module 122 can be connected to the vehicle body controller.

[0074] In some embodiments, the communication module 122 is connected to the vehicle body controller via hard wiring, a CAN bus, or a LIN bus. The CAN bus, also known as the automotive bus, is a serial communication network that effectively supports distributed and real-time control. It can replace hard wiring, reducing component design complexity and lowering development costs. The LIN bus is a low-cost, low-speed serial communication network protocol for sensor / actuator control, serving as a low-cost alternative to the low-speed CAN bus. Furthermore, the LIN bus typically does not exist independently in a vehicle; it is typically connected to the CAN bus to form a CAN-LIN gateway node.

[0075] Based on the above structure, see Figure 1 The control component 12 further includes a power supply 123 , which is connected to the capacitance detection chip 121 to supply power to the capacitance detection chip 121 and a communication module 122 connected to the capacitance detection chip 121 .

[0076] In some embodiments, the power supply 123 may be a direct current power supply or an alternating current power supply.

[0077] In some embodiments, when the power supply 123 is a DC power supply, the output voltage of the power supply 123 may be 3V to 5V.

[0078] Since the capacitance detection chip 121, the communication module 122 and the power supply 123 are all powered components, in order to ensure the safety of the control component 12, see Figure 1 The control component 12 includes a housing 124 , and the capacitance detection chip 121 , the power supply 123 and the communication module 122 are all located in the housing 124 .

[0079] By providing the housing 124 , the control component 12 can be encapsulated and protected to prevent the capacitance detection chip 121 , the communication module 122 and the power supply 123 from being corroded and damaged, thereby ensuring the safe and stable use of the rain sensor 1 .

[0080] In summary, the rain sensor provided in the embodiment of the present application has a simple structure, a compact size, and is easy to manufacture.

[0081] The embodiment of the present application also provides a vehicle, the structural diagram of which is as follows Figure 2 shown.

[0082] See also Figure 2 The vehicle includes a rain sensor 1, a body controller (not shown in the figure) and a wiper 3 involved in the embodiment of the present application.

[0083] The rain sensor 1 and the wiper 3 are both connected to the vehicle body controller.

[0084] It can be understood that the body controller is located inside the vehicle and is the core control component of the vehicle, which can control the use of various components of the vehicle.

[0085] Because both the rain sensor 1 and the wipers 3 are connected to the vehicle body controller, when it rains, the vehicle body controller can obtain the rainfall value detected by the rain sensor 1, determine the operating position of the wipers 3 based on the measured rainfall value, and control the wipers 3 to perform scraping operations in the operating position. By using the rain sensor 1, the vehicle can more sensitively detect rainfall values ​​to meet the control and use requirements of automatic wipers, effectively avoiding the problem of false detection caused by infrared photoelectric rain sensors in the existing technology, and improving the driving experience of drivers and passengers.

[0086] In some embodiments, the vehicle further includes windows 4 and a sunroof 5 , wherein both the windows 4 and the sunroof 5 are connected to the vehicle body controller.

[0087] Since both the windows 4 and the sunroof 5 can be in the open state, the passengers in the cockpit can be exposed to the external environment through the windows 4 or the sunroof 5. When it rains, if the windows 4 and the sunroof 5 are in the open state, rainwater will flow into the cockpit, affecting the driving experience of the passengers. Therefore, by connecting both the windows 4 and the sunroof 5 to the body controller, the body controller can not only determine the working position of the wiper 3 and control the wiper 3 to start working after obtaining the rainfall value measured by the rain sensor 1, but also control the windows 4 and the sunroof 5 to close.

[0088] In some embodiments, the vehicle body controller can obtain the vehicle's start / stop status and, based on the vehicle's start / stop status, determine the usage status of the vehicle's rain sensor 1. For example, when the vehicle is stopped, i.e., when the rain sensor 1 is not needed, the vehicle body controller can send a power-off signal to the communication module 122 of the rain sensor 1, causing the capacitance detection chip 121 to control the power supply 123 to turn off, thereby reducing the vehicle's power consumption.

[0089] In some embodiments, the vehicle further includes a photoelectric sensor (not shown), which is located outside the vehicle's windshield 2, adjacent to the rain sensor 1, and connected to the vehicle body controller to detect whether there is a covering on the capacitor 11. It is understood that the covering here refers to substances other than raindrops.

[0090] When the body controller determines that the change in the capacitance value of the detection capacitor 11 is within the preset range and the electrical signal measured by the photoelectric sensor changes, it means that a raindrop has fallen on the detection capacitor 11 and there is no covering on the detection capacitor 11; when the body controller determines that the change in the capacitance value of the detection capacitor 11 is not within the preset range and the electrical signal measured by the photoelectric sensor changes, it means that there is a covering on the detection capacitor 11.

[0091] In some embodiments, when the body controller determines that there is a covering on the detection capacitor 11, it can send a prompt message, such as a sound prompt message or a light prompt message, to the vehicle's multimedia device to prompt the driver and passengers so that they can remove the covering on the detection capacitor 11.

[0092] In some embodiments, the photoelectric sensor can be connected to the vehicle body controller via a communication method such as hard wire, CAN bus or LIN bus.

[0093] The present application also provides a vehicle control method, which is applied to the vehicle body controller of the above vehicle. Figure 4 , the method specifically comprises the following steps:

[0094] Step 401: Obtain the rainfall value measured by the rain sensor 1.

[0095] The rainfall value is the rainfall value measured in real time by the rain sensor 1 .

[0096] Step 402 : Based on the rainfall value measured by the rain sensor 1 , the working position of the wiper 3 is determined and the vehicle window 4 and the sunroof 5 are controlled to be closed.

[0097] The operating gear of the wipers 3 is determined based on the rainfall value measured by the rain sensor 1 to meet the driver's usage needs under different rain conditions. For example, when the rainfall value is light, the corresponding operating gear of the wipers 3 is in a low gear. At this time, the wipers 3 scrape the windshield 2 more slowly, that is, the time interval between two scrapes is longer. When the rainfall value is heavy, the corresponding operating gear of the wipers 3 is in a high gear. At this time, the wipers 3 scrape the windshield 2 more frequently, that is, the time interval between two scrapes is shorter.

[0098] At the same time, based on the rainfall value measured by the rain sensor 1, the closing of the vehicle's windows 4 and sunroof 5 can be controlled, so that the windows 4 and sunroof 5 are closed in time when it rains to prevent rainwater from entering the cockpit and affecting the driving experience of the driver and passengers.

[0099] Therefore, the control method of the vehicle body controller provided in the embodiment of the present invention can determine the working position of the wiper 3 and control the closing of the window 4 and the sunroof 5 by obtaining the rainfall value measured by the rain sensor 1, thereby meeting the driving needs of the driver and passengers on rainy days and improving the driving experience of the driver and passengers.

[0100] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only.

[0101] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A rain sensor (1), characterized in that: The rain sensor (1) is located on a vehicle and comprises: a detection capacitor (11) and a control component (12); The control component (12) includes a capacitance detection chip (121), and the capacitance detection chip (121) is connected to the detection capacitor (11). When rain falls on the detection capacitor (11), the capacitance value of the detection capacitor (11) changes due to the difference between the dielectric constant of rain and the dielectric constant of air. The capacitance detection chip (121) is used to determine the rainfall value based on the change in the capacitance value of the detection capacitor (11); The detection capacitor (11) is located outside the rear windshield (2) of the vehicle. The detection capacitor (11) is a parallel plate capacitor. The parallel plate capacitor includes two flexible plates (111) arranged opposite to each other. Each flexible plate (111) has a metal electrode (112). The metal electrode (112) is located on a side of the flexible plate (111) away from the other flexible plate (111). The area of ​​the flexible plate (111) is 10×15 mm. 2 .

2. The rain sensor (1) according to claim 1, characterized in that The control component (12) further includes a communication module (122), and the communication module (122) is connected to the capacitance detection chip (121).

3. The rain sensor (1) according to claim 2, characterized in that The communication module (122) is used to send the rainfall value determined by the capacitance detection chip (121) to the vehicle body controller in a wireless and / or wired manner.

4. The rain sensor (1) according to claim 2, characterized in that The control component (12) further includes a power supply (123), and the power supply (123) is connected to the capacitance detection chip (121).

5. The rain sensor (1) according to claim 4, characterized in that The control component (12) comprises a housing (124), and the capacitance detection chip (121), the power supply (123) and the communication module (122) are all located in the housing (124).

6. A vehicle, characterized in that: The vehicle comprises a rain sensor (1) according to any one of claims 1 to 5, a vehicle body controller and a wiper (3), wherein both the rain sensor (1) and the wiper (3) are connected to the vehicle body controller.

7. The vehicle according to claim 6, characterized in that The vehicle further comprises vehicle windows (4) and a sunroof (5), and both the vehicle windows (4) and the sunroof (5) are connected to the vehicle body controller.

8. A vehicle control method, characterized in that: The method is applied to the vehicle body controller of the vehicle according to claim 7, and the method includes: Obtaining the rainfall value measured by the rain sensor (1); Based on the rainfall value measured by the rain sensor (1), the working position of the wiper (3) is determined and the vehicle window (4) and the sunroof (5) are controlled to be closed.

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