Sensing device, protection system and vehicle

Abstract

The utility model relates to a sensing device, a protection system and a vehicle, the sensing device comprises an emitter and a receiver, the emitter is used for emitting light rays, the receiver is used for receiving the light rays, the light rays emitted by the emitter irradiate a preset area, and the emitter and the receiver are located on the two sides of the preset area. According to the technical scheme, the first light and the second light which are different in wavelength are irradiated into the preset area, and when the ambient light changes, the first light and the second light are irradiated into the preset area. The first light and the second light with different wavelengths can reduce the influence on the use sensitivity of the sensing device caused by the change of ambient light, thereby ensuring the use stability of the sensing device.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a sensing device and protection system, and a vehicle. Background Technology

[0002] Today, in the field of automotive design and manufacturing, electric doors (such as electric tailgates) have become a popular and widely adopted standard feature. With the popularization of electric doors, the powerful electric motors may cause accidental injuries to users in certain situations.

[0003] In related technologies, door anti-pinch systems are used to control electric doors. However, these systems are greatly affected by environmental factors, leading to insensitivity. Utility Model Content

[0004] This application provides a sensing device that improves the stability of the sensing device in use, thereby at least partially solving the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a sensing device is provided for detecting a preset area of ​​a vehicle door; the sensing device includes:

[0006] Emitter, used to emit light; and

[0007] A receiver, used to receive the light emitted by the transmitter;

[0008] The transmitter and the receiver are located on opposite sides of the preset area, and the light shines on the preset area, including a first light and a second light with different wavelengths.

[0009] Optionally, the transmitter and the receiver are positioned opposite each other.

[0010] Optionally, the transmitter includes at least two independent light sources to emit a first light and a second light with different wavelengths.

[0011] Optionally, the transmitter includes:

[0012] A first transmitter, used to emit a first ray of light; and

[0013] The receiver includes:

[0014] A first receiver is used to receive the first light emitted by the first transmitter;

[0015] The first transmitter and the first receiver are arranged opposite each other to form a first detection surface located within the preset area.

[0016] Optionally, the transmitter further includes:

[0017] A second transmitter, used to emit a second beam; and

[0018] The receiver includes:

[0019] The second receiver is used to receive the second light emitted by the second transmitter;

[0020] The second transmitter and the second receiver are arranged opposite each other to form a second detection surface located within the preset area.

[0021] Optionally, the first detection surface may overlap with or separate from the second detection surface.

[0022] Optionally, the light includes infrared light;

[0023] The transmitter includes a multi-band infrared transmitter for emitting first and second infrared light of different wavelengths.

[0024] Optionally, the sensing device further includes:

[0025] A detector is used to detect whether the receiver simultaneously receives the first light and the second light emitted by the transmitter.

[0026] Optionally, the sensing device further includes:

[0027] A controller is used to stop the door when the sensing device triggers a protection condition;

[0028] The trigger protection condition includes the receiver not simultaneously receiving the first light and the second light emitted by the transmitter.

[0029] Optionally, the controller is also configured to close the door when the sensing device triggers a closing condition.

[0030] Optionally, the sensing device further includes:

[0031] An alarm is used to issue an alert when the sensing device triggers a protection condition.

[0032] Optionally, the sensing device further includes:

[0033] The housing has a housing space for housing the transmitter or the receiver;

[0034] The housing is connected to the vehicle door.

[0035] Optionally, the sensing device further includes:

[0036] Cleaning component, used for cleaning the surface of the housing;

[0037] The cleaning component is movably connected to the housing.

[0038] Optionally, the sensing device further includes:

[0039] A driving element is used to drive the housing to rotate relative to the cleaning element, so that the cleaning element cleans the surface of the housing.

[0040] Optionally, the sensing device further includes:

[0041] A transmission component is connected between the housing and the drive component;

[0042] The transmission component is used to enable the drive component and the housing to form a dynamic coupling.

[0043] According to a second aspect of this application, a protection system is provided, comprising: a sensing device, which is the sensing device described above.

[0044] Optionally, the protection system further includes a pressure detection device for stopping the vehicle doors when the preset space of the vehicle is fully loaded.

[0045] According to a third aspect of this application, a vehicle is provided, including a sensing device as described above or a protection system as described above.

[0046] The beneficial effect of this application is that it provides a sensing device that can improve the stability of use.

[0047] More specifically, some embodiments of this application may produce the following specific beneficial effects:

[0048] In the sensing device of this application embodiment, the sensing device is used to detect a preset area of ​​a vehicle (door). The sensing device includes a transmitter and a receiver. The transmitter emits light, and the receiver receives the light emitted by the transmitter. The transmitter and receiver are positioned on opposite sides of the preset area, and light is irradiated onto the preset area, including a first light and a second light with different wavelengths. Through the above technical solution, by using the first and second light with different wavelengths to irradiate the preset area, the different wavelengths of the first and second light can reduce the impact of changes in ambient light on the sensitivity of the sensing device, ensuring the stability of the sensing device in use.

[0049] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0052] Figure 1 This is a schematic diagram of the overall structure of the sensing device provided in an exemplary embodiment of this application;

[0053] Figure 2 This is a cross-sectional view of the receiver or transmitter and the cleaning component provided in an exemplary embodiment of this application;

[0054] Figure 3 This is a schematic diagram showing the positional structure of the housing and cleaning component provided in an exemplary embodiment of this application;

[0055] Figure 4 This is a structural block diagram of the sensing device provided in an exemplary embodiment of this application;

[0056] Figure 5 This is a structural block diagram of the protection system provided in an exemplary embodiment of this application;

[0057] Figure 6 This is a schematic diagram of the overall structure of the vehicle provided in an exemplary embodiment of this application.

[0058] Explanation of reference numerals in the attached figures:

[0059] 100, Sensing device; 100a, Preset area;

[0060] 110. Transmitter; 111. First transmitter; 112. Second transmitter;

[0061] 120. Receiver; 121. First receiver; 122. Second receiver;

[0062] 130. Detector;

[0063] 140. Controller; 150. Alarm; 160. Housing; 170. Cleaning components; 180. Transmission components; 10. Protection system; 200. Pressure detection device; 1. Vehicle. Detailed Implementation

[0064] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0065] According to the first aspect of this application, reference to Figures 1 to 5 A sensing device 100 is provided for detecting a preset area 100a of a vehicle 1. The preset area 100a mainly forms the area connecting the door and the interior space of the vehicle. The door can be the rear door of the vehicle 1. The sensing device 100 is mainly used to detect whether a human body or object is located within the preset area 100a, so as to avoid accidental injury or collision.

[0066] In related technologies, the infrared photodiodes used are single-band. Strong sunlight or other light sources may interfere with the operation of the infrared sensor, easily leading to misjudgments. That is, when using a single-band infrared photodiode, if an object is within a preset area of ​​100a, the infrared light emitted by the transmitting tube is blocked, theoretically the receiving tube should not receive the infrared light. However, ambient light may contain infrared light of the same wavelength as that of the single-band infrared photodiode, and the receiving tube may receive this ambient infrared light, resulting in misjudgment.

[0067] refer to Figure 1 The sensing device 100 of this application includes a transmitter 110 and a receiver 120.

[0068] The transmitter 110 is used to emit light, and the receiver 120 is used to receive the light emitted by the transmitter 110.

[0069] The transmitter 110 and receiver 120 are located on opposite sides of the preset area 100a. Light is irradiated into the preset area 100a and includes a first light and a second light with different wavelengths.

[0070] By using the above technical solution, the first and second rays with different wavelengths are used to illuminate the preset area 100a. When the ambient light changes, the first and second rays with different wavelengths can reduce the impact of the change in ambient light on the sensitivity of the sensing device 100, thus ensuring the stability of the sensing device 100.

[0071] It should be noted that this application reduces the impact on the sensitivity of the sensing device 100 caused by changes in ambient light by increasing the variety of wavelengths of light illuminating the preset area 100a.

[0072] The first and second rays of this application have different wavelengths, but it is not necessary to set not only the first and second rays, but also any two types of rays with different wavelengths, such as three types of rays with different wavelengths.

[0073] By setting up receiver 120, it is possible to receive the first light and the second light emitted by transmitter 110, forming a path for the emission and reception of light within the preset area 100a, and enabling detection of the preset area 100a.

[0074] If the receiver 120 fails to receive either or both of the first and second light rays, the movement of the car door needs to be stopped, for example, by closing it, to avoid causing injury to the human body and to improve the sensitivity of the sensing device 100.

[0075] In some embodiments, the transmitter 110 and the receiver 120 are positioned opposite each other.

[0076] The transmitter and receiver are positioned opposite each other, which allows for better emission and reception of light. No additional optical components are required, resulting in a simple and reliable structure.

[0077] In some embodiments, the transmitter includes at least two independent light sources, enabling the transmitter to emit a first light and a second light with different wavelengths.

[0078] It should be noted that all the independent light sources can be integrated into one housing to improve the integration of the generator.

[0079] Of course, each individual light source can also be placed in a separate housing, which can improve the flexibility of the layout.

[0080] In some embodiments, transmitter 110 includes a first transmitter 111, and receiver 120 includes a first receiver 121.

[0081] The first transmitter 111 is used to emit a first light, and the first receiver 121 is used to receive the first light emitted by the first transmitter 111, wherein the first transmitter 111 and the first receiver 121 are arranged opposite to each other to form a first detection surface located within a preset area 100a.

[0082] By setting the first transmitter 111 and the first receiver 121 opposite to each other and forming a first detection surface located within a preset area 100a, the accuracy of detection is improved.

[0083] For example, the first transmitter 111 and the first receiver 121 can be arranged in opposite positions, and a certain distance can be set between them.

[0084] In some embodiments, transmitter 110 further includes a second transmitter 112, and receiver 120 includes a second receiver 122.

[0085] The second transmitter 112 is used to emit a second light, and the second receiver 122 is used to receive the second light emitted by the second transmitter 112, wherein the second transmitter 112 and the second receiver 122 are arranged opposite to each other to form a second detection surface located within a preset area 100a.

[0086] By setting the second transmitter 112 and the second receiver 122 opposite to each other to form a second detection surface located within the preset area 100a, the detection accuracy and sensitivity of the sensing device 100 can be further improved by using the second detection surface in conjunction with the first detection surface.

[0087] For example, the second transmitter 112 and the second receiver 122 can be arranged in opposite positions, and a certain distance can be set between them.

[0088] refer to Figure 1 A preset area 100a can be enclosed by the first receiver 121, the first transmitter 111, the second receiver 122, and the second transmitter 112. The first receiver 121 can be placed between the second receiver 122 and the second transmitter 112, and the first receiver 121 is located on one side of the second receiver 122 and the second transmitter 112. Of course, the first transmitter 111 can be placed between the second receiver 122 and the second transmitter 112, and the first transmitter 111 is located on the other side of the second receiver 122 and the second transmitter 112 away from the first transmitter 111.

[0089] It is understood that the configuration of the first receiver 121, the first transmitter 111, the second receiver 122, and the second transmitter 112 in this application can be adjusted accordingly.

[0090] In some embodiments, the first detection surface and the second detection surface are arranged to overlap or be separate.

[0091] By overlapping the first detection surface with the second detection surface, the degree of overlap between the first light ray and the second light ray can be increased.

[0092] By separating the first detection surface from the second detection surface, the dispersion area of ​​the first light and the second light can be increased, thereby increasing the detection area of ​​the preset area 100a of the sensing device 100.

[0093] In some embodiments, the light includes infrared light, and the emitter 110 includes a multi-band infrared emitter 110, which is capable of emitting first infrared light and second infrared light with different wavelengths.

[0094] By setting the transmitter 110 as a multi-band infrared transmitter 110, a device can be used to emit multiple different infrared bands using a single transmitter 110, emitting multiple bands from near-infrared (NIR) to long-wave infrared (LWIR), thereby improving the overall integration of the sensing device 100.

[0095] Both the first transmitter 111 and the second transmitter 112 are multi-band infrared transmitters 110, which can emit infrared light in multiple bands. Of course, one of the first transmitter 111 and the second transmitter 112 can also be set as a multi-band transmitter 110.

[0096] Of course, the first transmitter 111 and the second transmitter 112 can also be other types of transmitters, such as multi-band ultraviolet lasers, which can emit multi-band ultraviolet lasers.

[0097] In other words, light can include infrared light, ultraviolet light, and visible light.

[0098] Infrared light includes infrared lasers, and also includes far-infrared, mid-infrared, and near-infrared light.

[0099] Ultraviolet light includes ultraviolet lasers, and visible light includes visible lasers; both can be generated by corresponding lasers.

[0100] Similarly, receiver 120 can also be configured as a multi-band receiver 120, which can receive multiple devices with different infrared bands and receive light of different wavelengths, further improving the overall integration of sensing device 100.

[0101] Both the first receiver 121 and the second receiver 122 are multi-band infrared receivers 120, which can receive infrared light in multiple bands. Of course, one of the first receiver 121 and the second receiver 122 can also be set as a multi-band receiver 120.

[0102] Similarly, the first receiver 121 and the second receiver 122 can also be multi-band ultraviolet receivers, such as multi-band photomultiplier tubes (PMTs) and multi-band ultraviolet enhancement detectors, which can all receive multi-band ultraviolet lasers.

[0103] Similarly, the first receiver 121 and the second receiver 122 can also be multi-band visible light laser receivers, such as multi-band photodiode arrays or multi-band photomultiplier tubes (PMTs), which can receive multi-band visible light lasers.

[0104] In some embodiments, the sensing device 100 further includes a detector 130.

[0105] The detector 130 is used to detect whether the receiver 120 simultaneously receives the first light and the second light emitted by the transmitter 110.

[0106] By setting the detector 130 to detect whether the receiver 120 simultaneously receives the first light and the second light emitted by the transmitter 110, it is determined whether the sensing device 100 has triggered the protection condition.

[0107] The protection condition can be triggered when the receiver 120 fails to receive either the first or the second light beam, or when neither light beam is received.

[0108] When there are three or more wavelengths of light, the protection condition is triggered if the receiver 120 fails to receive any one of the three or more light wavelengths, or if none of the three or more light wavelengths are received, meaning that none of the light wavelengths are received.

[0109] For example, if the light source includes infrared light, and three types of infrared light are provided, then the receiver 120 will not receive any of the three types of infrared light. Alternatively, it may be that none of the three types of light are received, meaning that none of the infrared light is received.

[0110] The number of wavelengths of ultraviolet and visible light can be set to the same number as the number of infrared light mentioned above, or more can be set, which will not be elaborated here.

[0111] In some embodiments, the sensing device 100 further includes a controller 140.

[0112] The controller 140 is used to stop the door when the sensing device 100 triggers a protection condition, wherein the triggering protection condition includes the receiver 120 not simultaneously receiving a first light and a second light emitted by the transmitter 110.

[0113] By setting the controller 140 to stop the door from moving when the sensing device 100 triggers a protection condition, the control accuracy and stability of the sensing device 100 are improved.

[0114] When the detector 130 detects that the receiver 120 receives only one of the first light rays or the second light rays emitted by the transmitter 110, it is determined that the light rays in the preset area 100a are blocked by a human body or object, and the controller 140 is used to stop the car door from moving.

[0115] For example, the door can be stopped from closing during the closing process, or the door can be stopped from opening during the opening process.

[0116] In some embodiments, the controller 140 is also configured to close the door when the sensing device 100 triggers a closing condition.

[0117] By using the controller 140 to close the door when the sensing device 100 triggers the closing condition, the door can be closed without the user having to press a switch on the door.

[0118] Regarding the closing condition, you can set a swipe direction, such as from left to right or from top to bottom.

[0119] Taking a left-to-right swiping direction as an example, when the electric tailgate needs to be closed, the user can trigger the first transmitter 111 and the second transmitter 112 from left to right in sequence when the user's hand moves from left to right in the first and second detection surfaces. The controller 140 analyzes the triggering sequence of the transmitter 110 to determine the swiping direction and thus determine whether the closing conditions of the car door are met. If the closing conditions are met, the controller 140 controls the car door to close.

[0120] At the same time, the controller 140 will also monitor the first detection surface and the second detection surface, and control the door to close if no object or human body is detected within a set time.

[0121] For example, when the first transmitter and the first receiver are positioned opposite each other, and the second transmitter and the second receiver are positioned opposite each other, such a scheme uses a through-beam method to detect whether light is received, which achieves both safety detection and the function of closing the car door, thereby improving user experience and practicality.

[0122] In some embodiments, the sensing device 100 further includes an alarm 150.

[0123] Alarm 150 is used to issue an alarm when sensing device 100 triggers a protection condition.

[0124] By setting the alarm 150, an alarm can be issued when the sensing device 100 triggers the protection condition, so as to notify the user that there is an object or human body on the detection surface within the preset area 100a.

[0125] In some embodiments, the sensing device 100 further includes a housing 160.

[0126] The housing 160 has a housing space for housing the transmitter 110 or the receiver 120, wherein the housing 160 is connected to the door of the vehicle 1.

[0127] The housing 160 has a housing space for placing the transmitter 110 or the receiver 120, that is, the transmitter 110 and the receiver 120 are placed in different housings 160, which can protect the transmitter 110 or the receiver 120 from damage, such as moisture, which would reduce the sensitivity.

[0128] In some embodiments, the sensing device 100 further includes a cleaning component 170.

[0129] The cleaning component 170 is used to clean the surface of the housing 160, wherein the cleaning component 170 is movably connected to the housing 160.

[0130] By setting the cleaning component 170 to clean the surface of the housing 160, it can be ensured that the light emitted by the transmitter 110 can pass through the housing 160 into the preset area 100a and be received by the receiver 120, without being affected by contaminants on the housing 160, which would cause the light to be blocked and thus lead to misjudgment by the sensing device 100.

[0131] For example, the cleaning member 170 surrounds a portion of the housing 160 such that after the cleaning member 170 has finished cleaning the housing 160, the path of light emitted by the transmitter 110 and the path of light received by the receiver 120 are not blocked.

[0132] It should be noted that the inner wall surface of the cleaning component 170 is adapted to maintain contact with the outer wall surface of the housing 160. The cleaning component 170 can be a cleaning sponge, which can be arranged on the inner wall surface of a carrier, such as a semi-circular substrate.

[0133] In some embodiments, the sensing device 100 further includes a driver.

[0134] The driving component is used to drive the housing 160 to rotate relative to the cleaning component 170 so that the cleaning component 170 cleans the surface of the housing 160.

[0135] By setting a driving component to drive the housing 160 to rotate relative to the cleaning component 170, it is convenient to clean the housing 160.

[0136] The drive unit can be configured as a small drive motor.

[0137] In some embodiments, the sensing device 100 further includes a transmission member 180.

[0138] The transmission component 180 is connected between the housing 160 and the drive component, wherein the transmission component 180 is used to enable the drive component and the housing 160 to form a dynamic coupling.

[0139] By setting the transmission component 180 to couple the drive component and the housing 160, the drive component can more stably drive the housing 160 to rotate relative to the cleaning component 170.

[0140] For example, the transmission member 180 may be a transmission shaft connected to the side wall body of the housing 160.

[0141] In some embodiments, the transmitter 110 and the receiver 120 may not be directly opposite each other. When they are not directly opposite each other, the light emitted by the transmitter 110 will not be directly received by the receiver 120. An optical reflector can be provided in the light transmission path to reflect the light so that the receiver 120 can receive the light emitted by the transmitter 110.

[0142] It should be noted that the setting of the optical reflector is not the focus of protection in the embodiments of this application, and will not be described in detail here.

[0143] According to a second aspect of this application, a protection system 10 is provided, including: a sensing device 100, which is the sensing device 100 as described above.

[0144] The protection system 10 includes a sensing device 100. The protection system 10 has all the beneficial effects of the aforementioned sensing device 100, which will not be repeated here.

[0145] In some embodiments, the protection system 10 further includes a pressure detection device 200 for stopping the doors of the vehicle 1 when a preset space of the vehicle 1 is fully loaded.

[0146] Since the sensor 100 is a light-emitting device without curvature, the actual preset space inside the car, such as the trunk which holds a lot of things, will protrude slightly onto a certain detection surface. The trunk can still be closed normally, or soft materials can be pressed down lightly without affecting the closing of the door.

[0147] Considering this situation, for example, when the trunk is fully loaded, in order not to affect the detection, the sensing device 100 can be turned off and the pressure detection device 200 can be turned on. The pressure detection device 200 can be used to stop the door of the vehicle 1 when the preset space of the vehicle 1 is fully loaded.

[0148] The pressure detection device 200 in this application is a conventional pressure detection device in the prior art, and will not be described in detail here.

[0149] According to the third aspect of this application, with reference to Figure 6 A vehicle 1 is provided, including either the sensing device 100 as described above or the protection system 10 as described above.

[0150] The vehicle 1 includes the aforementioned sensing device 100. The vehicle 1 has all the beneficial effects of the aforementioned sensing device 100, which will not be repeated here.

[0151] The vehicle 1 includes the aforementioned protection system 10.

[0152] The vehicle 1 has all the beneficial effects of the aforementioned protection system 10, which will not be repeated here.

[0153] The vehicle 1 can be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not make any specific restrictions on it.

[0154] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0155] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0156] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0157] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A sensing device for detecting a pre-set area of a vehicle door of a vehicle; characterized in that, The sensing device comprises: a transmitter for emitting light; and a receiver for receiving the light emitted by the transmitter; wherein the transmitter and the receiver are located on two sides of the preset area, the light is irradiated to the preset area, and the light comprises first light and second light with different wavelengths.

2. The sensing device of claim 1, wherein, The transmitter and the receiver are oppositely arranged.

3. The sensing device of claim 1, wherein, The transmitter comprises at least two independent light sources for emitting the first light and the second light with different wavelengths.

4. The sensing device of claim 1, wherein, The transmitter comprises: a first transmitter for emitting first light; and The receiver comprises: a first receiver for receiving the first light emitted by the first transmitter; wherein the first transmitter and the first receiver are oppositely arranged to form a first detection surface located in the preset area.

5. The sensing device of claim 4, wherein, The transmitter further comprises: a second transmitter for emitting second light; and The receiver comprises: a second receiver for receiving the second light emitted by the second transmitter; wherein the second transmitter and the second receiver are oppositely arranged to form a second detection surface located in the preset area.

6. The sensing device of claim 5, wherein, The first detection surface and the second detection surface are arranged in overlapping or separated manner.

7. The sensing device according to claim 1, wherein the light comprises infrared light; the transmitter comprises a multi-band infrared transmitter for emitting first infrared light and second infrared light with different wavelengths.

8. The sensing device of claim 1, wherein, The sensing device further comprises: a detector for detecting whether the receiver simultaneously receives the first light and the second light emitted by the transmitter.

9. The sensing device of claim 8, wherein, The sensing device further comprises: a controller for stopping the vehicle door when the sensing device triggers a protection condition. wherein the triggering of the protection condition comprises that the receiver does not simultaneously receive the first light and the second light emitted by the transmitter.

10. The sensing device of claim 9, wherein, The controller is further configured to close the vehicle door when the sensing device triggers a closing condition.

11. The sensing device of claim 9, wherein, The sensing device further comprises: an alarm for issuing an alarm when the sensing device triggers a protection condition.

12. The sensing device according to any one of claims 1 to 11, characterized in that The sensing device further comprises: a housing having a housing space for placing the transmitter or the receiver; wherein the housing is connected with the vehicle door.

13. The sensing device of claim 12, wherein, The sensing device further comprises: a cleaning member for cleaning the surface of the housing; wherein the cleaning member is movably connected with the housing.

14. The sensing device of claim 13, wherein, The sensing device further comprises: a driving member for driving the housing to rotate relative to the cleaning member, so that the cleaning member cleans the surface of the housing.

15. The sensing device of claim 14, wherein, The sensing device further comprises: a transmission member connected between the housing and the driving member; wherein the transmission member is configured to power-couple the driving member and the housing.

16. A protection system characterized by The sensing device comprises: a sensing device according to any one of claims 1 to 15.

17. The protection system of claim 16, wherein, The protection system further comprises: a pressure detection device for stopping the vehicle door when a preset space of the vehicle is in a full load state.

18. A vehicle characterized by comprising: The protection system comprises: a sensing device according to any one of claims 1 to 15 or a protection system according to claim 16 or 17.

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