Vehicle lamp projection system for parking space line and application method of vehicle lamp projection system

Abstract

The invention discloses a vehicle lamp projection system for a parking space line and an application method of the vehicle lamp projection system, and belongs to the field of vehicle lamps. The system comprises a wireless connection device, a projection control system, a projector and a camera, the projection control system is connected with the wireless connection device, the projector and the camera, and the projector is used for projecting a temporary parking space line around a vehicle; the camera is used for collecting existing parking space line information around a vehicle and sending the information to the projection control system. The projection control system is used for adjusting the position, color and shape of the temporary parking space line projected by the projector according to the existing parking space line information around the vehicle; and the wireless connection device is used for realizing wireless communication between the projection control system and other vehicles so as to assist temporary parking space line projection of the current vehicle or other vehicles. The temporary parking space is established through vehicle lamp projection, and the temporary parking space can be eliminated at any time.

Description

Technical Field

[0001] The present invention belongs to the field of vehicle lamps, and in particular, relates to a vehicle lamp projection system for parking space lines and an application method thereof. Background Art

[0002] At present, there is a shortage of parking spaces in the city. When drivers want to park temporarily in some places, there are no temporary parking spaces, which is inconvenient. And it is impossible for drivers to temporarily paint parking lines on the ground, so a convenient and environmentally friendly way to create temporary parking spaces is needed.

[0003] As a vehicle projection system, the projection system is currently mainly used for ground lighting, driver prompts, and pedestrian reminders. For example, the comparative document (CN118700924A) discloses a driving safety control method based on projection lights and a vehicle control system, which belongs to the field of vehicle automatic driving technology. The driving safety control method based on projection lights is implemented by the vehicle control system and includes the following steps: S1, triggering the intersection steering assistance program; S2, the positioning system in the vehicle control system detects the direction of the intersection and the steering state of the vehicle;

[0004] S3. Determine whether the vehicle is going straight. If so, execute step S2; if not, execute step S4; S4. Select a preset route in the same direction according to the direction of the intersection, and confirm the driving direction corresponding to the current intersection; S5. The camera obtains the road image information of the current direction, and the driving status sensor obtains the current driving status information, and obtains the distance data between the current vehicle and the intersection; S6. Extract the intersection features in the road image information, call up the intersection sign picture corresponding to the road image information in the intersection icon library, and preset the projection position of the projection lamp in the intersection sign picture; S7. The projection position information of the preset projection lamp is transmitted to the headlight controller through the control system, and the headlight controller receives the lighting instruction and controls the corresponding projection lamp to illuminate.

[0005] Obviously, the above-mentioned comparative documents mainly use projection lights for vehicle driving safety. Currently, there is no projection system for establishing temporary parking spaces for parking the vehicle or helping other vehicles to park. Summary of the invention

[0006] The present invention aims to overcome the shortcomings of the prior art and proposes a vehicle light projection system for parking space lines and an application method thereof to achieve the following objectives: when there are insufficient parking spaces, temporary parking spaces can be established through the vehicle light projection system and the application method of the present application, and the temporary parking spaces can be eliminated at any time.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A vehicle light projection system for parking lines, the system comprising a wireless connection device, a projection control system, a projector and a camera, the projection control system being connected to the wireless connection device, the projector and the camera respectively, wherein the projector is used to project temporary parking lines around a vehicle; the camera is used to collect existing parking line information around the vehicle and send it to the projection control system; the projection control system is used to adjust the position, color and shape of the temporary parking lines projected by the projector according to the existing parking line information around the vehicle; the wireless connection device is used to realize wireless communication between the projection control system and other vehicles, so as to assist in the projection of temporary parking lines of the current vehicle or other vehicles.

[0009] At the same time, the present invention also proposes an application method of the vehicle light projection system based on the above system, the method is used for a vehicle equipped with the vehicle light projection system to establish a single temporary parking space line, comprising:

[0010] Step S1, when the vehicle 1 is parked next to the original parking space line with reference to the original parking space line, the vehicle 1 collects the image of the original parking space line through the camera and sends it to the projection control system;

[0011] Step S2, the projection control system of the vehicle 1 identifies whether there is a vehicle parked on the original parking line according to the image of the original parking line and establishes a coordinate system to sequentially confirm the coordinates of each corner of the original parking line;

[0012] Step S3, the projection control system of the vehicle 1 calculates the coordinates of each corner of the temporary parking space line 1 by combining the coordinates of each corner of the original parking space line and the vehicle data;

[0013] Step S4, the projection control system of the vehicle 1 controls the projector of the vehicle 1 to project the temporary parking space line 1;

[0014] Step S5 , the projection control system of the vehicle 1 scales the image of the original parking line and overlays the image on the temporary parking space line 1 through the projector of the vehicle 1 .

[0015] Preferably, in step S2, when there is no vehicle on the original parking line, the projection control system establishes a two-dimensional coordinate system with the center of vehicle 1 as the origin, and confirms the coordinates of each corner of the original parking line in sequence according to the image of the original parking line, which are respectively recorded as A(x1, y1), B(x2, y2), C(x3, y3), and D(x4, y4), wherein AB, BD, DC, and CA respectively represent the four sides of the original parking line; when there is a vehicle on the original parking line, there are only the coordinates of points A and B.

[0016] Preferably, in step S3, after the vehicle 1 is parked beside the original parking line with the AB side as the reference line, the projection control system uses AB as one side of the temporary parking line 1, and correspondingly, A(x1, y1) and B(x2, y2) are respectively used as the coordinates of the two corners of the temporary parking line 1, and at the same time, the distance L1 of the vehicle from the original parking line is identified by the camera, and the coordinates of the remaining two corners of the temporary parking line 1 are calculated in combination with the vehicle data, which are recorded as E(x5, y5) and F(x6, y6), respectively, where E On the extension line of CA, F is on the extension line of BD. At this time, EF, FB, BA, and AE are the four sides of the temporary parking line 1. The vehicle data includes the vehicle's own length or width L2 and the fixed parking reserved distance L3; the selection of the vehicle's own length or width is determined by the vehicle parking method. When the door side of the vehicle is close to the reference line, the vehicle's own width is selected. When the front or rear side of the vehicle is close to the reference line, the vehicle's own length is selected. When there is no vehicle parked on the original parking line, the coordinate calculation formula of E and F is as follows:

[0017] x5=f1[x1, x3, y1, y3, (L1+L2+L3)];

[0018] y5=f2[x1, x3, y1, y3, (L1+L2+L3)];

[0019] x6=f3[x2, x4, y2, y4, (L1+L2+L3)];

[0020] y6=f4[x2, x4, y2, y4, (L1+L2+L3)];

[0021] Among them, f1 indicates that the horizontal coordinate x5 of point E is related to the coordinates of point A, point C and L1+L2+L3; f2 indicates that the vertical coordinate y5 of point E is related to the coordinates of point A, point C and L1+L2+L3; f3 indicates that the horizontal coordinate x6 of point F is related to the coordinates of point B, point D and L1+L2+L3; f4 indicates that the vertical coordinate y6 of point F is related to the coordinates of point B, point D and L1+L2+L3.

[0022] Preferably, when there is a vehicle parked on the original parking space line, the projection control system cannot obtain the coordinates of the original parking space lines D and C through the image collected by the camera. At this time, the coordinate calculation formula of E and F is simplified as follows:

[0023] x5=f1[x1, y1, (L1+L2+L3)];

[0024] y5=f2[x1, y1, (L1+L2+L3)];

[0025] x6=f3[x2, y2, (L1+L2+L3)];

[0026] y6=f4[x2, y2, (L1+L2+L3)];

[0027] Among them, f1 indicates that the horizontal coordinate x5 of point E is related to the coordinates of point A and L1+L2+L3; f2 indicates that the vertical coordinate y5 of point E is related to the coordinates of point A and L1+L2+L3; f3 indicates that the horizontal coordinate x6 of point F is related to the coordinates of point B and L1+L2+L3; f4 indicates that the vertical coordinate y6 of point F is related to the coordinates of point B and L1+L2+L3.

[0028] Preferably, in step S5, when there is no vehicle parked in the original parking space, the projection control system will scale the parking line image of the AB section parking line by a ratio and project it to the position of the EF section parking line through the projector; the projection control system will scale the parking line image of the CA section parking line by a ratio and project it to the position of the AE section parking line through the projector; the projection control system will scale the parking line image of the DB section parking line by a ratio and project it to the position of the BF section parking line through the projector; wherein the scaling ratio calculation formula is as follows:

[0029]

[0030] Preferably, when a vehicle is parked in the original parking space, the projection control system cannot obtain the coordinates of the original parking lines D and C through the image captured by the camera. At this time, the projection control system will scale the parking line image of the AB section parking line by a ratio and project it to the position of the EF section parking line through the projector; the projection control system will scale the parking line image of the AB section parking line by a ratio and project it to the position of the AE section parking line through the projector; the projection control system will scale the parking line image of the AB section parking line by a ratio and project it to the position of the BF section parking line through the projector; wherein the scaling ratio calculation formula is as follows:

[0031]

[0032] Preferably, the method is also used for two vehicles equipped with the headlight projection system, namely, vehicle 1 and vehicle 2, to establish three temporary parking lines, including:

[0033] Step S6, after vehicle 1 establishes temporary parking space line 1 through steps S1 to S5, vehicle 2 is parked next to vehicle 1 and is spaced at least one parking space away from vehicle 1, and vehicle 2 collects an image of temporary parking space line 1 through its camera and sends it to its projection control system;

[0034] Step S7: Vehicle 2 determines the distance between vehicle 2 and temporary parking line 1 through the image of temporary parking line 1, and calculates the coordinates of each corner of temporary parking line 2 and temporary parking line 3;

[0035] Step S8, vehicle 2 projects temporary parking space line 2 and temporary parking space line 3;

[0036] Step S9 : Vehicle 2 obtains the projected image of temporary parking space line 1 by establishing a wireless connection with vehicle 1 and covers the projected image on temporary parking space line 2 and temporary parking space line 3 .

[0037] Preferably, in step S7, a coordinate system is established and the coordinates of the two corners E and F of the temporary parking line 1 are determined through the image of the temporary parking line 1. The temporary parking line 2 uses the point E and the point F of the temporary parking line 1 as the coordinates of two of its corners, and the remaining two corners are respectively recorded as I and J, wherein I is on the extension line of AE and J is on the extension line of BF. At this time, the four sides of the temporary parking line 2 are respectively IJ, JF, FE, and EI; the temporary parking line 3 uses the point I and the point J as the coordinates of two of its corners, and the remaining two corners are respectively recorded as G and H, wherein G is on the extension line of EI and H is on the extension line of JF. At this time, the four sides of the temporary parking line 3 are respectively GH, HJ, JI, and IG; when calculating the coordinates of each corner of the temporary parking line 2 and the temporary parking line 3, firstly calculate the coordinates of the points G and H according to the method of steps S1 to S3, and then offset them in the direction of the temporary parking line 1 with reference to the coordinates of G and H, and the offset distance is L2+L3, and finally obtain the coordinates of I and J.

[0038] Preferably, in step S8, the projection control system of the vehicle 2 controls the light of its projector to connect EG, GH, FH, and IJ, and finally forms the temporary parking space line 2 and the temporary parking space line 3.

[0039] The technical effects of the present invention are:

[0040] (1) The present invention applies the projection system to the generation of temporary parking space lines, which is ready for use and can be turned off at any time without causing pollution to the ground. It is very convenient and environmentally friendly.

[0041] (2) The present invention can realize the projection of one parking space line for one vehicle, and can also project parking space lines greater than the number of vehicles through the cooperation between multiple vehicles, thereby providing more temporary parking spaces and facilitating the parking of more vehicles, especially vehicles that are not equipped with the headlight projection system of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A structural diagram of a vehicle light projection system according to an embodiment of the present invention;

[0043] Figure 2 This is a working diagram of the vehicle light projection system according to the first embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of parking space projection according to the first embodiment of the present invention;

[0045] Figure 4 This is a working diagram of the vehicle light projection system according to the second embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram of parking space projection according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0047] The following is a further detailed description of the specific implementation of the present invention by describing the embodiments with reference to the accompanying drawings, with the purpose of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate its implementation. In order to make the technical solution of the present invention clearer, the present invention is explained by the following embodiments.

[0048] like Figure 1 As shown, the present invention proposes a vehicle light projection system for parking space lines, the system comprising a wireless connection device, a projection control system, a projector and a camera, the projection control system being connected to the wireless connection device, the projector and the camera respectively.

[0049] The projector is used to project temporary parking space lines around the vehicle. Generally, projectors are arranged in the four directions of the vehicle, front, back, left, and right. Each projector can project parking space lines of various colors and adjust the degree of damage of the parking space lines according to the control of the projection control system. Common projectors can be projectors or projection lamps.

[0050] The camera is used to collect the existing parking space line information around the vehicle (with images of parking space line color, shape, and position) and send it to the projection control system. The camera can be a traditional camera. In order to improve the accuracy of parking space line recognition, a high-precision camera can also be used. Generally, cameras are arranged in the four directions of the front, back, left, and right of the vehicle.

[0051] The projection control system is used to adjust the position, color and shape of the temporary parking space line projected by the projector according to the existing parking space line information around the vehicle. In specific implementation, the projection control system can flexibly adopt a controller with efficient data processing capabilities such as a vehicle control unit (VCU) and a microcontroller (MCU) according to actual conditions.

[0052] The wireless connection device is used to realize wireless communication between the projection control system and other vehicles to assist in the projection of temporary parking space lines of the current vehicle or other vehicles. The wireless connection device can generally be a Bluetooth connection device, a 4G connection device, a 5G connection device, etc.

[0053] Embodiment 1:

[0054] Based on the above-mentioned vehicle light projection system, this embodiment proposes an application method of the vehicle light projection system. The method of this embodiment is used for a vehicle equipped with the vehicle light projection system to establish a single temporary parking space line next to the original parking space line, such as Figure 2 The method flow chart of this embodiment is shown below. Figure 3 The parking space projection diagram is used to illustrate.

[0055] Step S1: After the vehicle 1 is parked next to the original parking space line with reference to the original parking space line, the vehicle 1 collects the image of the original parking space line through the camera and sends it to the projection control system.

[0056] Step S2, the projection control system of the vehicle 1 identifies whether there is a vehicle parked on the original parking line according to the image of the original parking line and establishes a coordinate system to confirm the coordinates of each corner of the original parking line in sequence.

[0057] Specifically, when there is no vehicle on the original parking space line, the projection control system establishes a two-dimensional coordinate system with the center of the vehicle 1 as the origin. In actual implementation, other reference points can also be selected as the origin, such as the corners of the original parking space line. The specific selection can be flexibly based on the actual situation. Then, the coordinates of the corners of the original parking space line are confirmed in turn according to the image of the original parking space line, such as Figure 3 As shown, they are recorded as A(x1,y1), B(x2,y2), C(x3,y3), and D(x4,y4), respectively, where AB, BD, DC, and CA represent the four sides of the original parking line. When there is a vehicle parked on the original parking line, the original parking lines D and C are blocked, and the projection control system cannot obtain the coordinates of the original parking lines D and C through the image captured by the camera, so there are only the coordinates of points A and B.

[0058] Step S3: The projection control system of the vehicle 1 calculates the coordinates of each corner of the temporary parking space line 1 by combining the coordinates of each corner of the original parking space line and the vehicle data.

[0059] In this embodiment, after the vehicle 1 is parked next to the original parking line with the AB side as the reference line, the projection control system uses AB as one side of the temporary parking line 1. Correspondingly, A (x1, y1) and B (x2, y2) are respectively used as the coordinates of the two corners of the temporary parking line 1. At the same time, the distance L1 between the vehicle and the original parking line (the distance between the vehicle 1 and the AB side) is identified by the camera, and the coordinates of the remaining two corners of the temporary parking line 1 are calculated in combination with the vehicle data, which are recorded as E (x5, y5) and F (x6, y6), respectively. Among them, E is on the extension line of CA and F is on the extension line of BD. At this time, EF, FB, BA, and AE are the four sides of the temporary parking line 1. The vehicle data includes the vehicle's own length or width L2 and the fixed reserved distance L3 for parking (in this embodiment, it is the distance between the vehicle and the EF side, which is used to prevent the vehicle from scratching). The selection of the vehicle's own length or width is determined by the vehicle parking method. When the door side of the vehicle is close to the reference line, the vehicle's own width is selected, such as Figure 3 As shown; when the front or rear side of the vehicle is close to the reference line, select the length of the vehicle body itself.

[0060] When there is no vehicle parked on the original parking space line, the coordinate calculation formulas of E and F are as follows:

[0061] x5=f1[x1, x3, y1, y3, (L1+L2+L3)];

[0062] y5=f2[x1, x3, y1, y3, (L1+L2+L3)];

[0063] x6=f3[x2, x4, y2, y4, (L1+L2+L3)];

[0064] y6=f4[x2, x4, y2, y4, (L1+L2+L3)];

[0065] Among them, f1 indicates that the horizontal coordinate x5 of point E is related to the coordinates of point A, point C and L1+L2+L3; f2 indicates that the vertical coordinate y5 of point E is related to the coordinates of point A, point C and L1+L2+L3; f3 indicates that the horizontal coordinate x6 of point F is related to the coordinates of point B, point D and L1+L2+L3; f4 indicates that the vertical coordinate y6 of point F is related to the coordinates of point B, point D and L1+L2+L3. The specific relationship between f1, f2, f3 and f4 can be obtained through geometric calculation according to the actual coordinate relationship. Taking f1 as an example, the horizontal coordinate of point E is the same as that of point A or point C. The vertical coordinate of point E can be obtained by offsetting the coordinate of point A away from the original stop line by a distance of L1+L2+L3, or the vertical coordinate of point E can be obtained by offsetting the coordinate of point C away from the original stop line by a distance of L1+L2+L3+|y1-y3|.

[0066] Furthermore, when there is a vehicle parked on the original parking space line, the projection control system cannot obtain the coordinates of the original parking space lines D and C through the image collected by the camera. At this time, the coordinate calculation formula of E and F is simplified as follows:

[0067] x5=f1[x1, y1, (L1+L2+L3)];

[0068] y5=f2[x1, y1, (L1+L2+L3)];

[0069] x6=f3[x2, y2, (L1+L2+L3)];

[0070] y6=f4[x2, y2, (L1+L2+L3)];

[0071] Among them, f1 indicates that the horizontal coordinate x5 of point E is related to the coordinates of point A and L1+L2+L3; f2 indicates that the vertical coordinate y5 of point E is related to the coordinates of point A and L1+L2+L3; f3 indicates that the horizontal coordinate x6 of point F is related to the coordinates of point B and L1+L2+L3; f4 indicates that the vertical coordinate y6 of point F is related to the coordinates of point B and L1+L2+L3.

[0072] Step S4, the projection control system of vehicle 1 controls the projector of vehicle 1 to project temporary parking space line 1. The projection control system controls the projector of vehicle 1 to project light to connect AE, EF, and FB with a straight line, and then combine with the original parking space line AB, thus forming a temporary parking space line 1 (AEFB).

[0073] Step S5 , the projection control system of the vehicle 1 scales the image of the original parking line and overlays the image on the temporary parking space line 1 through the projector of the vehicle 1 .

[0074] In order to ensure that the color and shape of the temporary parking lines are as consistent as possible with the original parking lines, this embodiment will transmit the image of the original parking lines (containing color and shape information) to the projection control system, and then the projection control system will scale the image of the original parking lines and project it onto the temporary parking lines according to a certain scaling ratio.

[0075] Specifically, when there is no vehicle parked in the original parking space, the projection control system will scale the parking line image of the AB section parking line by a ratio and project it to the position of the EF section parking line through the projector; the projection control system will scale the parking line image of the CA section parking line by b ratio and project it to the position of the AE section parking line through the projector; the projection control system will scale the parking line image of the DB section parking line by c ratio and project it to the position of the BF section parking line through the projector; the scaling ratio calculation formula is as follows:

[0076]

[0077] When there is a vehicle parked in the original parking space, the projection control system cannot obtain the coordinates of the original parking lines D and C through the image collected by the camera. At this time, the projection control system will scale the parking line image of the AB section parking line by a ratio and project it to the position of the EF section parking line through the projector; the projection control system will scale the parking line image of the AB section parking line by b ratio and project it to the position of the AE section parking line through the projector; the projection control system will scale the parking line image of the AB section parking line by c ratio and project it to the position of the BF section parking line through the projector; the scaling ratio calculation formula is as follows:

[0078]

[0079] When the vehicle driver turns off the headlight projection system, the projector stops projecting the temporary parking space, thus eliminating the temporary parking space very conveniently and environmentally friendly.

[0080] Embodiment 2:

[0081] Embodiment 2 Based on Embodiment 1, the present invention is also applied to two vehicles equipped with the vehicle light projection system, namely, vehicle 1 and vehicle 2, and finally three temporary parking lines are established, such as Figure 4 The method flow chart of this embodiment is shown below. Figure 5 The parking space projection diagram is used to illustrate.

[0082] Based on the first embodiment, the method further includes:

[0083] Step S6: After the vehicle 1 passes through steps S1 to S5, a temporary parking space line 1 is established ( Figure 5 After the AEFB is completed, vehicle 2 is parked next to vehicle 1 and is at least one parking space away from vehicle 1. Vehicle 2 collects the image of temporary parking space line 1 through its camera and sends it to its projection control system. At the same time, vehicle 1 and vehicle 2 can automatically establish a connection through a wireless communication device.

[0084] Step S7 : Vehicle 2 determines the distance between vehicle 2 and temporary parking line 1 through the image of temporary parking line 1 , and calculates the coordinates of each corner of temporary parking line 2 and temporary parking line 3 .

[0085] Specifically, the same as step S2, firstly establish a coordinate system and determine the coordinates of the two corners E and F of the temporary parking line 1 through the image of the temporary parking line 1, the temporary parking line 2 uses the point E and the point F of the temporary parking line 1 as the coordinates of two of its corners, and the remaining two corners are respectively recorded as I and J, wherein I is on the extension line of AE and J is on the extension line of BF. At this time, the four sides of the temporary parking line 2 are IJ, JF, FE, and EI respectively; the temporary parking line 3 uses the point I and the point J as the coordinates of two of its corners, and the remaining two corners are respectively recorded as G and H, wherein G is on the extension line of EI and H is on the extension line of JF. At this time, the four sides of the temporary parking line 3 are respectively GH, HJ, JI, and IG.

[0086] When calculating the coordinates of each corner of temporary parking line 2 and temporary parking line 3, first calculate the coordinates of points G and H according to the method of step S1 to step S3, that is, replace the coordinates of the original parking line (ABDC) in embodiment 1 with the coordinates of temporary parking line 1 (EFBA); replace reference line AB with EF; replace the distance of vehicle 1 from the AB side with the distance of vehicle 2 from the EF side, and then calculate the coordinates of points G and H according to the method of calculating the coordinates of points E and F. Further, with reference to the coordinates of G and H, offset them in the direction of temporary parking line 1, the offset distance is L2+L3, and finally obtain the coordinates of I and J.

[0087] Step S8, vehicle 2 projects temporary parking line 2 and temporary parking line 3. In this embodiment, the projection control system of vehicle 2 controls the light of its projector to connect EG, GH, FH, and IJ, and finally forms temporary parking line 2 (IJFE) and temporary parking line 3 (GHJI).

[0088] Step S9: Vehicle 2 obtains the projected image of temporary parking line 1 by establishing a wireless connection with vehicle 1 and covers the temporary parking line 2 and temporary parking line 3. Vehicle 2 directly obtains the relevant projected data of temporary parking line 1 of vehicle 1 through wireless communication, including the scaling ratio, color, shape, etc. of the parking line, without repeated calculation, thereby improving the projection efficiency.

[0089] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A vehicle light projection system for parking space lines, characterized in that: The system includes a wireless connection device, a projection control system, a projector and a camera, wherein the projection control system is connected to the wireless connection device, the projector and the camera respectively, wherein the projector is used to project temporary parking lines around the vehicle; the camera is used to collect existing parking line information around the vehicle and send it to the projection control system; the projection control system is used to adjust the position, color and shape of the temporary parking lines projected by the projector according to the existing parking line information around the vehicle; the wireless connection device is used to realize wireless communication between the projection control system and other vehicles to assist in the projection of temporary parking lines of the current vehicle or other vehicles.

2. An application method of a vehicle light projection system, characterized in that: The method is applied to the vehicle light projection system for parking space lines according to claim 1, and the method is used for a vehicle equipped with the vehicle light projection system to establish a single temporary parking space line, comprising: Step S1, when the vehicle 1 is parked next to the original parking space line with reference to the original parking space line, the vehicle 1 collects the image of the original parking space line through the camera and sends it to the projection control system; Step S2, the projection control system of the vehicle 1 identifies whether there is a vehicle parked on the original parking line according to the image of the original parking line and establishes a coordinate system to sequentially confirm the coordinates of each corner of the original parking line; Step S3, the projection control system of the vehicle 1 calculates the coordinates of each corner of the temporary parking space line 1 by combining the coordinates of each corner of the original parking space line and the vehicle data; Step S4, the projection control system of the vehicle 1 controls the projector of the vehicle 1 to project the temporary parking space line 1; Step S5 , the projection control system of the vehicle 1 scales the image of the original parking line and overlays the image on the temporary parking space line 1 through the projector of the vehicle 1 .

3. The application method of the vehicle light projection system according to claim 2, characterized in that: In step S2, when there is no vehicle on the original parking line, the projection control system establishes a two-dimensional coordinate system with the center of vehicle 1 as the origin, and confirms the coordinates of each corner of the original parking line in sequence according to the image of the original parking line, which are recorded as A(x1, y1), B(x2, y2), C(x3, y3), and D(x4, y4), respectively, where AB, BD, DC, and CA represent the four sides of the original parking line respectively; when there is a vehicle on the original parking line, there are only the coordinates of points A and B.

4. The application method of the vehicle light projection system according to claim 3, characterized in that: In step S3, after the vehicle 1 is parked beside the original parking space line with the AB side as the reference line, the projection control system uses AB as one side of the temporary parking space line 1, and correspondingly, A(x1, y1) and B(x2, y2) are respectively used as the coordinates of the two corners of the temporary parking space line 1. At the same time, the distance L1 between the vehicle and the original parking space line is identified by the camera, and the coordinates of the remaining two corners of the temporary parking space line 1 are calculated in combination with the vehicle data, which are recorded as E(x5, y5) and F(x6, y6), respectively, where E is in C A is on the extension line of the reference line, and F is on the extension line of BD. At this time, EF, FB, BA, and AE are the four sides of the temporary parking line 1. The vehicle data includes the vehicle's own length or width L2 and the fixed reserved parking distance L3; the selection of the vehicle's own length or width is determined by the vehicle parking method. When the door side of the vehicle is close to the reference line, the vehicle's own width is selected. When the front or rear side of the vehicle is close to the reference line, the vehicle's own length is selected. When there is no vehicle parked on the original parking line, the coordinate calculation formula of E and F is as follows: x5=f1[x1, x3, y1, y3, (L1+L2+L3)]; y5=f2[x1, x3, y1, y3, (L1+L2+L3)]; x6=f3[x2, x4, y2, y4, (L1+L2+L3)]; y6=f4[x2, x4, y2, y4, (L1+L2+L3)]; Among them, f1 indicates that the horizontal coordinate x5 of point E is related to the coordinates of point A, point C and L1+L2+L3; f2 indicates that the vertical coordinate y5 of point E is related to the coordinates of point A, point C and L1+L2+L3; f3 indicates that the horizontal coordinate x6 of point F is related to the coordinates of point B, point D and L1+L2+L3; f4 indicates that the vertical coordinate y6 of point F is related to the coordinates of point B, point D and L1+L2+L3.

5. The application method of the vehicle light projection system according to claim 4, characterized in that: When there is a vehicle parked on the original parking line, the projection control system cannot obtain the coordinates of the original parking lines D and C through the image collected by the camera. At this time, the coordinate calculation formula of E and F is simplified as follows: x5=f1[x1, y1, (L1+L2+L3)]; y5=f2[x1, y1, (L1+L2+L3)]; x6=f3[x2, y2, (L1+L2+L3)]; y6=f4[x2, y2, (L1+L2+L3)]; Among them, f1 indicates that the horizontal coordinate x5 of point E is related to the coordinates of point A and L1+L2+L3; f2 indicates that the vertical coordinate y5 of point E is related to the coordinates of point A and L1+L2+L3; f3 indicates that the horizontal coordinate x6 of point F is related to the coordinates of point B and L1+L2+L3; f4 indicates that the vertical coordinate y6 of point F is related to the coordinates of point B and L1+L2+L3.

6. The application method of the vehicle light projection system according to claim 4 or 5, characterized in that: In step S5, when there is no vehicle parked in the original parking space, the projection control system will scale the parking space line image of the AB section parking space line by a ratio and then project it to the position of the EF section parking space line through the projector; The projection control system will scale the parking space line image of the CA section parking space line by a ratio b and then project it to the position of the AE section parking space line through the projector; The projection control system will scale the parking space line image of the DB section parking space line by a certain ratio and project it to the position of the BF section parking space line through the projector; in The scaling ratio is calculated as follows:

7. The application method of the vehicle light projection system according to claim 6, characterized in that: When there is a vehicle parked in the original parking space, the projection control system cannot obtain the coordinates of the original parking lines D and C through the image collected by the camera. At this time, the projection control system will scale the parking line image of the AB section parking line by a ratio and project it to the position of the EF section parking line through the projector; the projection control system will scale the parking line image of the AB section parking line by b ratio and project it to the position of the AE section parking line through the projector; the projection control system will scale the parking line image of the AB section parking line by c ratio and project it to the position of the BF section parking line through the projector; the scaling ratio calculation formula is as follows:

8. The application method of the vehicle light projection system according to any one of claims 5 to 7, characterized in that: The method is also used for two vehicles equipped with the vehicle light projection system, namely vehicle 1 and vehicle 2, to establish three temporary parking lines, including: Step S6, after vehicle 1 establishes temporary parking space line 1 through steps S1 to S5, vehicle 2 is parked next to vehicle 1 and is spaced at least one parking space away from vehicle 1, and vehicle 2 collects an image of temporary parking space line 1 through its camera and sends it to its projection control system; Step S7: Vehicle 2 determines the distance between vehicle 2 and temporary parking line 1 through the image of temporary parking line 1, and calculates the coordinates of each corner of temporary parking line 2 and temporary parking line 3; Step S8, vehicle 2 projects temporary parking space line 2 and temporary parking space line 3; Step S9 : Vehicle 2 obtains the projected image of temporary parking space line 1 by establishing a wireless connection with vehicle 1 and covers the projected image on temporary parking space line 2 and temporary parking space line 3 .

9. The application method of the vehicle light projection system according to claim 8, characterized in that: In the step S7, a coordinate system is established and the coordinates of the two corners E and F of the temporary parking line 1 are determined through the image of the temporary parking line 1. The temporary parking line 2 uses the point E and the point F of the temporary parking line 1 as the coordinates of two of its corners, and the remaining two corners are recorded as I and J, wherein I is on the extension line of AE and J is on the extension line of BF. At this time, the four sides of the temporary parking line 2 are IJ, JF, FE, and EI respectively; the temporary parking line 3 uses the point I and the point J as the coordinates of two of its corners, and the remaining two corners are recorded as G and H respectively, wherein G is on the extension line of EI and H is on the extension line of JF. At this time, the four sides of the temporary parking line 3 are GH, HJ, JI, and IG respectively; when calculating the coordinates of each corner of the temporary parking line 2 and the temporary parking line 3, firstly calculate the coordinates of the points G and H according to the method of steps S1 to S3, and then offset them in the direction of the temporary parking line 1 with reference to the coordinates of G and H, and the offset distance is L2+L3, and finally obtain the coordinates of I and J.

10. The application method of the vehicle light projection system according to claim 9, characterized in that: In step S8 , the projection control system of vehicle 2 controls the light of its projector to connect EG, GH, FH, and IJ, and finally forms temporary parking space line 2 and temporary parking space line 3 .

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