Automobile defrosting method and device

Abstract

The invention relates to an automobile defrosting method and device, and the method comprises the steps: obtaining the light transmittance of automobile glass, and comparing the light transmittance with a first light transmittance threshold value; when the light transmittance is lower than the first light transmittance threshold value, a blowing device is started to execute defrosting, and the starting time point of the blowing device is recorded; calculating a time interval between the starting time point and the last starting time point, and comparing the time interval with a time interval threshold value; when the time interval is lower than the time interval threshold value, defrosting is executed, and the air conditioner is started; comparing the light transmittance with a second light transmittance threshold when the time interval is higher than the time interval threshold; and when the light transmittance is higher than a second light transmittance threshold value, the air blowing device is closed to relieve defrosting, and the second light transmittance threshold value is larger than the first light transmittance threshold value. According to the automobile glass defrosting method and device, when the light transmittance of the automobile glass is lower than the first light transmittance threshold value, the air blowing device is started to execute defrosting, the purpose of automatic defrosting is achieved, a driver is liberated, under the condition that frosting is fast, the air conditioner is further started to conduct defrosting, and the temperature in a cabin is improved while long-acting defrosting is achieved.

Description

Technical Field

[0001] The present application relates to the automotive field, and in particular to an automotive defrosting method and a device thereof. Background Art

[0002] Traditional car defrosting refers to using a car heater or engine cooling circulation system to heat cold air into hot air, and then spraying it onto the windshield through the defrost duct and defrost nozzle to increase the temperature of the windshield and remove the frost layer. In winter, especially in the north, a layer of frost often forms on the front windshield of the car due to the low outdoor temperature. In order to make the car usable as soon as possible, existing cars are generally equipped with a defrost device connected to the car air conditioning duct at the front windshield to defrost the front windshield of the car. The above device requires the driver to judge and then start it manually. In addition, when there are many people in the car and the temperature difference between the inside and outside of the car is large, the frost formation speed is very fast, which requires the driver to operate frequently, affects driving safety, and gives passengers a bad cabin experience. Summary of the invention

[0003] The present application provides a vehicle defrosting method and device, which can solve the problem in the related art that the driver needs to judge whether to defrost and manually start the defrosting device. In the case of fast frosting speed, the driver needs to operate frequently, which affects driving safety.

[0004] In a first aspect, an embodiment of the present application provides a vehicle defrosting method, which comprises:

[0005] Obtaining the light transmittance of the vehicle glass and comparing it with a first light transmittance threshold;

[0006] When the light transmittance is lower than a first light transmittance threshold, the blowing device is started to perform defrosting, and the start time of the blowing device is recorded;

[0007] Calculate the time interval between the start time point and the last start time point, and compare it with the time interval threshold;

[0008] When the time interval threshold is lowered, performing defrost also includes starting the air conditioner;

[0009] When it is higher than the time interval threshold, comparing the transmittance with a second transmittance threshold;

[0010] When the light transmittance is higher than a second light transmittance threshold, the blowing device is turned off to stop defrosting, and the second light transmittance threshold is greater than the first light transmittance threshold.

[0011] In combination with the first aspect, in one implementation, after the air conditioner is started for a preset time, the air conditioner and the blowing device are turned off to stop defrosting.

[0012] In combination with the first aspect, in one implementation, starting the air conditioner specifically includes:

[0013] Get the current outside temperature and time interval;

[0014] Based on the pre-stored relationship table, the air volume of the air conditioner corresponding to the time interval at the vehicle outside temperature is obtained;

[0015] Start the air conditioner and control it to run at this air volume.

[0016] In combination with the first aspect, in one implementation, when the outside temperature of the vehicle is the same, the air volume of the air conditioner corresponding to different time intervals is different.

[0017] In combination with the first aspect, in one implementation, the vehicle glass is one or more of a vehicle window glass, a front windshield, and a rear windshield.

[0018] In combination with the first aspect, in one embodiment, when the vehicle glass is a window glass, a front windshield, and a rear windshield, when the transmittance of one of the vehicle glasses is lower than a first transmittance threshold, the blowing device is started to perform defrosting;

[0019] Alternatively, when the vehicle glass is several of the vehicle window glass, the front windshield and the rear windshield, when the light transmittance of all the vehicle glasses is lower than the first light transmittance threshold, the blowing device is started to perform defrosting.

[0020] In combination with the first aspect, in one implementation, the value range of the first light transmittance threshold is 0-80%.

[0021] In combination with the first aspect, in one implementation, the second light transmittance threshold value ranges from 95% to 100%.

[0022] In the second aspect, an embodiment of the present application provides a car defrost device, which includes: a first module, a second module, a third module, a fourth module, a fifth module, a sixth module and a seventh module, the first module is used to: obtain the transmittance of the vehicle glass; the second module is used to: compare the transmittance of the vehicle glass with a first transmittance threshold; the third module is used to: when it is lower than the first transmittance threshold, start the blowing device to perform defrosting, and record the start time point of the blowing device; the fourth module is used to: calculate the time interval between the start time point and the last start time point, and compare it with the time interval threshold; the fifth module is used to: when the time interval is lower than the time interval threshold, start the air conditioner when performing defrosting; the sixth module is used to: when the time interval is higher than the time interval threshold, compare the transmittance with the second transmittance threshold; the seventh module is used to: when it is higher than the second transmittance threshold, turn off the blowing device to stop defrosting, and the second transmittance threshold is greater than the first transmittance threshold.

[0023] In combination with the second aspect, in one embodiment, the first module includes: a transmittance detection device, a sensor response area and a controller, the transmittance detection device is arranged on one side of the vehicle's glass; the sensor response area is arranged on the other side of the vehicle's glass and corresponds to the setting position of the transmittance detection device; the controller is connected to the transmittance detection device and is used to collect the transmittance of the vehicle's glass.

[0024] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0025] The embodiment of the present application provides a car defrosting method and device. When the transmittance of the car glass is lower than a first transmittance threshold, the blowing device is started to perform defrosting to achieve the purpose of automatic defrosting, thereby liberating the driver. In the case of rapid frost formation, which is often accompanied by a low temperature outside the car, the time interval between the start time point and the last start time point will be lower than the time interval threshold. At this time, in addition to using the blowing device for defrosting, the air conditioner is also started for defrosting to adjust the temperature difference between the inside and outside of the car, so as to achieve long-term defrosting while improving the temperature in the cabin, so that the driver and passengers have a better cabin experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

[0027] Figure 1 A schematic diagram of a vehicle defrosting device provided in an embodiment of the present application;

[0028] Figure 2 A logic diagram of a vehicle defrosting method provided in an embodiment of the present application;

[0029] Figure 3 A flow chart of the vehicle defrosting method provided in an embodiment of the present application.

[0030] In the figure: 1. Transmittance detection equipment; 2. Sensor response area. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] See also Figures 1 to 3 The embodiment of the present application provides a method and device for defrosting a car, which can solve the problem in the related art that the driver needs to judge whether to defrost and manually start the defrost device. When the frosting speed is fast, the driver needs to operate frequently, which affects driving safety.

[0033] In a first aspect, an embodiment of the present application provides a method for defrosting a vehicle, comprising:

[0034] 101: Obtaining the light transmittance of the vehicle glass and comparing it with a first light transmittance threshold;

[0035] 102: when the light transmittance is lower than the first light transmittance threshold, start the blowing device to perform defrosting, and record the start time of the blowing device;

[0036] 103: Calculate the time interval between the startup time point and the last startup time point, and compare it with the time interval threshold;

[0037] 104: when the temperature is lower than the time interval threshold, executing defrosting also includes starting the air conditioner;

[0038] 105: when the light transmittance is higher than the time interval threshold, comparing the light transmittance with a second light transmittance threshold;

[0039] 106: When the light transmittance is higher than a second light transmittance threshold, turning off the blowing device to stop defrosting, wherein the second light transmittance threshold is greater than the first light transmittance threshold.

[0040] In the present application, when the transmittance of the vehicle glass is lower than the first transmittance threshold, the blowing device is started to perform defrosting to achieve the purpose of automatic defrosting, thereby liberating the driver. In the case of rapid frost formation, which is often accompanied by low temperature outside the vehicle, the time interval between the start time point and the last start time point will be lower than the time interval threshold. At this time, in addition to using the blowing device for defrosting, the air conditioner is also started for defrosting to adjust the temperature difference between the inside and outside of the vehicle, so as to achieve long-term defrosting while improving the temperature in the cabin, allowing the driver and passengers to have a better cabin experience.

[0041] In this embodiment, the transmittance of the vehicle glass is obtained through the transmittance detection device 1, the sensor response area 2 and the controller. The transmittance detection device 1 is arranged on one side of the vehicle glass; the sensor response area 2 is arranged on the other side of the vehicle glass and corresponds to the setting position of the transmittance detection device 1; the controller is connected to the transmittance detection device 1 and is used to collect the transmittance of the vehicle glass. In this embodiment, the car is prone to frost on the vehicle glass when the temperature is low and the temperature difference between the inside and the outside is large. Therefore, the sensor response area 2 is arranged on the outside of the vehicle glass, and the transmittance measured by the transmittance measurement device arranged on the inside is sent to the controller, and the controller controls the blowing device and the air conditioner to perform defrosting and release defrosting.

[0042] It should be noted that after the blower is started for the first time to perform defrosting, it is only necessary to perform the steps of recording the start-up time of the blower and turning off the blower to release the defrosting when the light transmittance of the vehicle glass is higher than the second light transmittance threshold. When the blower is started for the second, third, etc. time to perform defrosting, since the blower has been started before, it is also necessary to perform steps 103 to 106, that is, it is necessary to calculate the time interval between the current start-up time of the blower and the last start-up time, and compare the time interval with the time interval threshold:

[0043] When the time interval is lower than the threshold, it is determined that the vehicle glass is frosting too quickly. Frequently starting the blower device for defrosting will reduce the service life of parts and have a negative impact on the driving experience. In this case, in addition to starting the blower device for defrosting, the air conditioner also needs to be started, which can not only meet the requirements of long-term defrosting, but also allow the driver and passengers to have a better cabin experience.

[0044] When it is higher than the time interval threshold, when the blowing device is defrosting, the light transmittance of the vehicle glass will gradually increase until it exceeds the first light transmittance threshold. At this time, it is necessary to continuously obtain the light transmittance of the vehicle glass and compare the light transmittance of the vehicle glass with the second light transmittance threshold. That is to say, when the light transmittance of the vehicle glass is lower than the second light transmittance threshold, it is necessary to continuously turn on the wind device until the light transmittance of the vehicle glass is higher than the second light transmittance threshold, and then turn off the blowing device to release the defrosting. After releasing the defrosting, return to step 101 and continue to obtain the light transmittance of the vehicle glass.

[0045] In this embodiment, the second transmittance threshold is set to be greater than the first transmittance threshold. Further, the value range of the first transmittance threshold is set to 0-80%; the value range of the second transmittance threshold is 95%-100%. Specifically, preferably, in this embodiment, the first transmittance threshold is set to 80%, and the second transmittance threshold is set to 95%. In other implementations, the first transmittance threshold can also be set to 70%, and the second transmittance threshold can be set to 90%. The specific setting is determined according to the actual situation. In this embodiment, that is, when the transmittance of the vehicle glass is lower than 80%, the blowing device is started to perform defrosting. When the time interval between the current start-up time point of the blowing device and the last start-up time point is higher than the time interval threshold, the transmittance is compared with the second transmittance threshold of 95%. When it is higher than 95%, the blowing device is turned off to release the defrosting.

[0046] On the basis of the above embodiments, in this embodiment, it should be further explained that the vehicle glass is set to be one or more of the vehicle window glass, the front windshield and the rear windshield.

[0047] In some possible embodiments, the vehicle glass is a front windshield, and the blowing device is an air conditioning blowing device. When the light transmittance of the front windshield is lower than a first light transmittance threshold, the blowing device, that is, the blowing port of the air conditioning blowing device, is opened to perform defrosting.

[0048] In some other possible embodiments, the vehicle glass is selected from among vehicle window glass, front windshield and rear windshield. In this embodiment, when the vehicle glass is selected from among vehicle window glass, front windshield and rear windshield, it can be set that when the transmittance of one of the vehicle glass is lower than the first transmittance threshold, the blowing device is started to perform defrosting, that is, the transmittance of the vehicle window glass, the transmittance of the front windshield and the transmittance of the rear windshield need to be obtained, and the transmittance of the vehicle window glass, the transmittance of the front windshield and the transmittance of the rear windshield are all compared with the first transmittance threshold, and when there is a transmittance lower than the first transmittance threshold, the blowing device is started;

[0049] It can also be arranged that when the vehicle glass is several of the window glass, front windshield and rear windshield, when the transmittance of all the vehicle glasses is lower than a first transmittance threshold, the blowing device is started to perform defrosting: that is, when the transmittance of the window glass, the transmittance of the front windshield and the transmittance of the rear windshield are all lower than the first transmittance threshold, the blowing device is started to perform defrosting.

[0050] In this embodiment, the blowing device for defrosting the front windshield can be an air conditioning blowing device, and the blowing device for defrosting the vehicle windows and rear windshield can be a device that is separately arranged at the vehicle windows and rear windshield and can blow out warm air.

[0051] Among them, the above embodiments are only multiple possible implementation methods of the embodiments of the present application, and the embodiments of the present application are not limited thereto.

[0052] On the basis of the above embodiment, in this embodiment, after the air conditioner is started for a preset time, the air conditioner and the blowing device are turned off to stop defrosting.

[0053] Specifically, when the time interval threshold is lower than the time interval threshold, the air conditioner and the blower are started for defrosting. To avoid wasting energy of the car, the air conditioner and the blower are started for a preset time, and then the air conditioner and the blower are stopped to stop defrosting. In this embodiment, the preset time is set to 30 minutes, that is, after 30 minutes of starting the air conditioner and the blower, the controller controls the air conditioner and the blower to stop running. After the air conditioner and the blower stop running, the light transmittance of the car glass needs to be continuously obtained, and the operations of steps 101 to 106 are performed.

[0054] Based on the above embodiment, in this embodiment, in step 104: starting the air conditioner, specifically steps 1041 to 1043 are included:

[0055] Step 1041: Obtain the current vehicle exterior temperature and time interval;

[0056] Step 1042: Look up the pre-stored relationship table to obtain the air volume of the air conditioner corresponding to the time interval at the vehicle outside temperature;

[0057] Step 1043: Start the air conditioner and control the air conditioner to run at the air volume.

[0058] Before step 101, a relationship table between the outside temperature, time interval and air conditioning air volume needs to be established. It should be noted that in this embodiment, the time interval threshold is set to 5 minutes. Furthermore, in this embodiment, when the same outside temperature is set, the air volume of the air conditioner corresponding to different time intervals is different.

[0059] Specifically: The relationship between the outside temperature, time interval and air conditioning air volume is as follows:

[0060]

[0061]

[0062] The principle of the above parameter correspondence table: set 4 temperature gradients: -30℃≤K<-10℃, -10℃≤K<5℃, -5℃≤K<15℃, K≥15℃; through CAE simulation analysis, it is concluded that under the conditions of these 4 temperature gradients, when there are 1, 2, 3, 4, and 5 people in the car, the combined influence of factors such as the breathing of the people in the car and the external environment will cause the time interval for frosting of the car glass to be different. Therefore, each temperature gradient can be divided into 5 time interval gradients according to the different environments. The longer the time interval, the longer the frosting time. At this time, in order to achieve a better defrosting and in-car temperature experience, different air-conditioning air volume controls can be turned on separately.

[0063] When the time interval between the start-up time point of the blowing device and the last start-up time point is lower than the time interval threshold, it is necessary to obtain the current outside temperature and time interval, and then the controller obtains the air conditioning air volume corresponding to the time interval at the outside temperature according to the pre-stored relationship table. For example: when the outside temperature is 0°C, when the time interval between the start-up time point and the last start-up time point calculated in step 103 is 4 minutes, the corresponding air conditioning air volume is 40%; when the outside temperature is 10°C, when the time interval between the start-up time point and the last start-up time point calculated in step 103 is 4 minutes, the corresponding air conditioning air volume is 35%... No more examples are given here.

[0064] After the air conditioner is turned on for 30 minutes, the air conditioner and the blower are turned off, the light transmittance of the vehicle glass is continuously obtained, and the operations of steps 101 to 106 are performed.

[0065] In summary, the present application can achieve the purpose of automatic defrosting when the vehicle glass is not frosted very quickly, that is, when the time when the blowing device is turned on twice adjacently is higher than the time interval threshold, so as to free the driver and allow the driver to concentrate on driving, and reduce the risk of the driver manually operating the defrost device; when the frost forms very quickly, that is, when the time when the blowing device is turned on twice adjacently is lower than the time interval threshold, which is often accompanied by low temperature outside the vehicle, the air conditioner is started to adjust the temperature difference between the inside and outside of the vehicle to achieve long-term defrosting while improving the temperature inside the cabin, so that the driver and passengers can have a better cabin experience.

[0066] In the second aspect, an embodiment of the present application provides a car defrost device, which includes: a first module, a second module, a third module, a fourth module, a fifth module, a sixth module and a seventh module, the first module is used to obtain the transmittance of the vehicle glass; the second module is used to compare the transmittance of the vehicle glass with a first transmittance threshold; the third module is used to: when it is lower than the first transmittance threshold, start the blowing device to perform defrosting, and record the start time point of the blowing device; the fourth module is used to: calculate the time interval between the start time point and the last start time point, and compare it with the time interval threshold; the fifth module is used to: when the time interval is lower than the time interval threshold, start the air conditioner when performing defrosting; the sixth module is used to: when the time interval is higher than the time interval threshold, compare the transmittance with the second transmittance threshold; the seventh module is used to: when it is higher than the second transmittance threshold, turn off the blowing device to stop defrosting, and the second transmittance threshold is greater than the first transmittance threshold.

[0067] In the present application, when the transmittance of the vehicle glass is lower than the first transmittance threshold, the blowing device is started to perform defrosting to achieve the purpose of automatic defrosting, thereby liberating the driver. In the case of rapid frost formation, which is often accompanied by low temperature outside the vehicle, the time interval between the start time point and the last start time point will be lower than the time interval threshold. At this time, in addition to using the blowing device for defrosting, the air conditioner is also started for defrosting to adjust the temperature difference between the inside and outside of the vehicle, so as to achieve long-term defrosting while improving the temperature in the cabin, allowing the driver and passengers to have a better cabin experience.

[0068] In this embodiment, the transmittance of the vehicle glass is obtained through the transmittance detection device 1, the sensor response area 2 and the controller. The transmittance detection device 1 is arranged on one side of the vehicle glass; the sensor response area 2 is arranged on the other side of the vehicle glass and corresponds to the setting position of the transmittance detection device 1; the controller is connected to the transmittance detection device 1 and is used to collect the transmittance of the vehicle glass. In this embodiment, the car is prone to frost on the vehicle glass when the temperature is low and the temperature difference between the inside and the outside is large. Therefore, the sensor response area 2 is arranged on the outside of the vehicle glass, and the transmittance measured by the transmittance measurement device arranged on the inside is sent to the controller, and the controller controls the blowing device and the air conditioner to perform defrosting and release defrosting.

[0069] In the description of the present application, it should be noted that the terms "upper", "lower", etc. 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0070] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0071] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. 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 application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for defrosting a car, characterized in that: It includes: Obtaining the light transmittance of the vehicle glass and comparing it with a first light transmittance threshold; When the light transmittance is lower than a first light transmittance threshold, the blowing device is started to perform defrosting, and the start time of the blowing device is recorded; Calculate the time interval between the start time point and the last start time point, and compare it with the time interval threshold; When the time interval threshold is lowered, performing defrost also includes starting the air conditioner; When it is higher than the time interval threshold, comparing the transmittance with a second transmittance threshold; When the light transmittance is higher than a second light transmittance threshold, the blowing device is turned off to stop defrosting, and the second light transmittance threshold is greater than the first light transmittance threshold.

2. The vehicle defrosting method according to claim 1, characterized in that: After starting the air conditioner for the preset time, turn off the air conditioner and the blower to stop defrosting.

3. The vehicle defrosting method according to claim 1, characterized in that: Start the air conditioner, including: Get the current outside temperature and time interval; Based on the pre-stored relationship table, the air volume of the air conditioner corresponding to the time interval at the vehicle outside temperature is obtained; Start the air conditioner and control it to run at this air volume.

4. The vehicle defrosting method according to claim 3, characterized in that: When the outside temperature is the same, the air volume of the air conditioner corresponding to different time intervals is different.

5. The vehicle defrosting method according to claim 1, characterized in that: The vehicle glass is one or more of a vehicle window glass, a front windshield and a rear windshield.

6. The vehicle defrosting method according to claim 5, characterized in that: When the vehicle glass is a window glass, a front windshield, and a rear windshield, when the transmittance of one of the vehicle glasses is lower than a first transmittance threshold, the blowing device is started to perform defrosting; Alternatively, when the vehicle glass is several of the vehicle window glass, the front windshield and the rear windshield, when the light transmittance of all the vehicle glasses is lower than the first light transmittance threshold, the blowing device is started to perform defrosting.

7. The vehicle defrosting method according to claim 1, characterized in that: The value range of the first light transmittance threshold is 0-80%.

8. The vehicle defrosting method according to claim 7, characterized in that: The value range of the second light transmittance threshold is 95%-100%.

9. A vehicle defrosting device, characterized in that: It includes: The first module is used to: obtain the light transmittance of the vehicle glass; The second module is used to compare the light transmittance of the vehicle glass with a first light transmittance threshold; A third module is used to: when the light transmittance is lower than a first light transmittance threshold, start the blowing device to perform defrosting, and record the start time of the blowing device; A fourth module is used to: calculate the time interval between the startup time point and the last startup time point, and compare it with the time interval threshold; A fifth module, which is used to: when the time interval is lower than the time interval threshold, start the air conditioner when performing defrosting; A sixth module, configured to: when the time interval is higher than the time interval threshold, compare the transmittance with a second transmittance threshold; The seventh module is used for: when the light transmittance is higher than a second light transmittance threshold, turning off the blowing device to stop defrosting, wherein the second light transmittance threshold is greater than the first light transmittance threshold.

10. The automobile defrosting device according to claim 9, characterized in that: The first module includes: A light transmittance detection device (1), wherein the light transmittance detection device (1) is arranged on a glass side of a vehicle; A sensor response area (2), the sensor response area (2) being arranged on the other side of the vehicle glass and corresponding to the location where the light transmittance detection device (1) is arranged; A controller is connected to the light transmittance detection device (1) and is used to collect the light transmittance of the vehicle glass.

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