Transport vehicle laminated glass and intelligent control system with same

Abstract

The invention provides transport vehicle laminated glass and an intelligent control system with the transport vehicle laminated glass, and belongs to the technical field of vehicles. The front windshield comprises an outer front windshield body, an inner front windshield body and a thermoplastic middle layer clamped between the outer front windshield body and the inner front windshield body, the outer front windshield body is provided with a first surface and a second surface, the inner front windshield body is provided with a third surface and a fourth surface, and the second surface and the fourth surface are oppositely arranged. An infrared high-transmittance PVB (Polyvinyl Butyral) membrane is locally spliced on the thermoplastic middle layer to form an infrared high-transmittance area of which the infrared transmittance is greater than or equal to 90%; a laser radar is arranged on the third surface of the inner front windshield, and the field angle of the laser radar is aligned with the infrared high-transmittance area so that the transmittance of infrared rays emitted by the laser radar to the front windshield can be larger than or equal to 90%. The middle cementing layer diaphragm adopts a locally-spliced infrared high-transmittance PVB diaphragm structure, so that the problem of infrared signal shielding caused by a metal coating layer is completely avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicles, and more specifically, relates to a laminated glass for a transport vehicle and an intelligent control system having the same. Background Art

[0002] In the process of building intelligent driving for transport vehicles, lidar technology occupies an indispensable position with its excellent accuracy and penetration ability. This technology emits laser pulses and captures the signals reflected by the targets to accurately measure key characteristics such as the position and speed of the targets and can construct a three-dimensional point cloud environment image for the domain controller to make correct decisions to control driving behavior. Currently, lidars are mainly arranged in two common positions on the roof and the front headlights of transport vehicles; arranging on the roof can increase the detection range and distance of the lidar's field of view. Currently, most lidars are arranged in this way on the roof. However, this arrangement has an obtrusive appearance and high wind resistance, which is both energy-consuming and has a poor experience. Arranging at the position of the front headlights can be highly integrated with the lamp group, and the angle control can be completed through technical means without sacrificing the ranging function. However, the position is low and it is easy to be soiled by rain and dust, and the radar is extremely easy to be damaged after a vehicle collision, resulting in too high maintenance costs.

[0003] In recent years, some manufacturers have proposed to arrange the lidar at the position of the black ink area directly above the middle of the front windshield of the transport vehicle. Arranging in this area can not only meet the requirements of no occlusion and no wind resistance, but also reduce maintenance costs, and even hardly affect the appearance and other advantages. However, currently, this arrangement has relatively high optical requirements for glass products. The wavelengths of the short pulse laser beams emitted by vehicle-mounted lidars are mainly 905nm and 1550mm, both of which are in the near-infrared wave range. Traditional front windshield glass will have an obvious blocking effect on these two wavelengths of infrared rays, unable to meet the requirement of a transmittance of 85%, resulting in a significant decline in its positioning and ranging performance. Summary of the Invention

[0004] The main purpose of the present invention is to provide a laminated glass for a transport vehicle and an intelligent control system having the same. By means of the structure of locally splicing an infrared highly transparent PVB film in the thermoplastic interlayer, the signals of the lidar can be effectively transmitted and interference can be avoided, thereby improving the intelligent driving control level of the transport vehicle.

[0005] To achieve the above object, the present application provides a laminated glass for a transport vehicle, including an outer front windshield glass, an inner front windshield glass, and a thermoplastic interlayer sandwiched between the outer front windshield glass and the inner front windshield glass. The outer front windshield glass has a first surface and a second surface, the inner front windshield glass has a third surface and a fourth surface, the second surface and the fourth surface are oppositely arranged, and an infrared highly transparent PVB film is locally spliced on the thermoplastic interlayer to form an infrared highly transparent area with a transmittance of infrared rays with wavelengths of 850nm - 1550nm being greater than or equal to 90%;

[0006] A lidar is provided on the third surface of the inner front windshield, and the field of view angle of the lidar is aligned with the infrared highly transmissive area, so that the infrared rays emitted by the lidar have a transmittance of greater than or equal to 90% to the front windshield.

[0007] Furthermore, the horizontal field of view of the field of view angle of the lidar ≥ 120°, and the vertical field of view of the field of view angle of the lidar ≥ 30°.

[0008] Furthermore, the installation angle of the outer front windshield and the inner front windshield is greater than or equal to 25°.

[0009] Furthermore, the installation angle of the outer front windshield and the inner front windshield and the incident angle of the infrared rays emitted by the lidar to the infrared highly transmissive area satisfy a complementary relationship.

[0010] Furthermore, the incident angle of the infrared rays emitted by the lidar to the infrared highly transmissive area is 50° to 60°.

[0011] Furthermore, the radius of curvature of the outer front windshield and the inner front windshield is greater than or equal to 2000 mm.

[0012] Furthermore, the thermoplastic interlayer is a non-metallic reflective heat-insulating material.

[0013] Furthermore, both the outer front windshield and the inner front windshield are made of ultra-clear glass substrates.

[0014] The present invention also provides an intelligent control system, including the laminated glass for transportation vehicles as described in any one of the above, and further including a vehicle body, an intelligent driving domain controller, a vehicle body domain controller, and a brake pedal actuator. The laminated glass for transportation vehicles is disposed on the vehicle body;

[0015] The lidar is used to sense and feedback the position and speed signals of the moving object in front to the intelligent driving domain controller. The intelligent driving domain controller sends a braking signal to the vehicle body controller through analysis and judgment, and the vehicle body controller then sends a braking instruction to the brake pedal actuator to complete the braking action.

[0016] Furthermore, the interaction method of the lidar with the intelligent driving domain controller, the vehicle body domain controller, and the brake pedal actuator further includes:

[0017] Detecting that there is a moving object that may intrude on the current vehicle driving path;

[0018] The lidar sends a pulse signal and captures the position and speed signals of the moving object in front and transmits them to the intelligent driving domain controller;

[0019] The intelligent driving domain controller receives, analyzes, and converts them into image signals, and displays the images on the display screen;

[0020] Determine whether the vehicle needs to urgently avoid moving objects;

[0021] If the vehicle does not need to urgently avoid moving objects, end this interaction; if the vehicle needs to urgently avoid moving objects, the intelligent driving domain controller outputs a braking signal to the body domain controller;

[0022] The body domain controller responds to the intelligent driving domain controller and outputs a braking instruction to the brake pedal actuator;

[0023] The brake pedal actuator drives the brake pads to complete the braking action.

[0024] Compared with the prior art, the beneficial effects of the present invention are: by adopting a locally spliced infrared high-transmittance PVB film structure in the intermediate adhesive layer diaphragm, the infrared signal shielding problem caused by the metal coating layer is completely avoided, and at the same time, the method is simple, the cost is low, and it is easy to industrialize. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the laminated glass of a transport vehicle provided by an embodiment of the present invention;

[0026] Figure 2 It is an axonometric view of the laminated glass of a transport vehicle provided by an embodiment of the present invention;

[0027] Figure 3 It is a cross-sectional view of the laminated glass of a transport vehicle provided by an embodiment of the present invention;

[0028] Figure 4 is Figure 3 a partial enlarged schematic view of part A in

[0029] Figure 5 It is a schematic view of the field of view angle of the lidar provided by an embodiment of the present invention;

[0030] Figure 6 It is a schematic framework diagram of the intelligent control system provided by an embodiment of the present invention;

[0031] Figure 7 It is an interaction schematic diagram of the intelligent control system provided by an embodiment of the present invention.

[0032] Reference numerals in the drawings: 1, lidar; 2, front windshield assembly; 201, first surface; 202, second surface; 203, third surface; 204, fourth surface; 205, thermoplastic intermediate layer; 206, infrared high-transmittance PVB film; 3, bracket cover; 4, front windshield bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will describe the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0034] The following uses specific specific examples to illustrate the implementation manners of the present disclosure. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The present disclosure can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without making creative efforts belong to the scope of protection of the present disclosure.

[0035] In the process of building intelligent driving for transportation vehicles, lidar technology occupies an indispensable position with its excellent accuracy and penetration ability. This technology emits laser pulses and captures the signals reflected by the targets to accurately measure key characteristics such as the position and speed of the targets and can construct a three-dimensional point cloud environment image for the domain controller to make correct decisions to control driving behaviors. Currently, lidars are mainly arranged in two common positions on the roof and the headlamps of transportation vehicles; arranging on the roof can increase the detection range of the lidar's field of view and distance. Currently, most lidars are arranged in this way on the roof. However, this arrangement is obtrusive in appearance and has a large wind resistance, which is both energy-consuming and has a poor experience. Arranging at the headlamp position can be highly integrated with the lamp group, and the angle control can be completed through technical means without sacrificing the ranging function. However, the position is low and it is easy to be soiled by rain and dust, and the radar is extremely vulnerable to damage after a vehicle collision, resulting in too high maintenance costs.

[0036] In recent years, some manufacturers have proposed to arrange the lidar in the black ink area directly above the middle of the front windshield of transportation vehicles. Arranging in this area can meet the requirements of no obstruction, no wind resistance, reduce maintenance costs, and even hardly affect the appearance and other advantages. However, currently, this arrangement has relatively high optical requirements for glass products. The wavelengths of the short pulse laser beams emitted by vehicle-mounted lidars are mainly 905nm and 1550mm, both of which are in the near-infrared wave range. Traditional front windshields will have an obvious blocking effect on the infrared rays of these two wavelengths, unable to meet the requirement of 85% transmittance, resulting in a significant decline in its positioning and ranging performance.

[0037] The existing public technology (CN101678651A) provides a method for adjusting the composition of the glass sheet. However, the technical solution has a transmittance of only 30% in the wavelength range of 400 nm - 2100 nm, which cannot meet the requirements of lidar use and has no practical use value. Another example is that another public technology (CN111409314A / B) provides a laminated glass for transportation vehicles that can be used in conjunction with lidar. It achieves a transmittance of more than 90% for infrared rays with wavelengths of near-infrared filter on the third and fourth sides by filling infrared anti-reflection filling blocks through holes. Since the installation holes are opened in the inner glass plate of this technology, the impact resistance of the glass is reduced. At the same time, the use of a metal coating layer will increase the probability of self-cracking of the perforated glass. The above will greatly reduce the durability and reliability of the vehicle. In addition, the airtightness of the intermediate adhesive layer is affected by the holes, resulting in problems such as a decrease in the bonding strength between the inner and outer glass layers and the overflow of air bubbles around the installation holes, and the actual practicality is not high. Another example is that the prior art with the publication number CN111761894A provides an electrically heated front windshield with locally high infrared transmittance that can be used in conjunction with lidar and / or infrared cameras. This technical solution has the following technical defects: in order to reduce the obstruction of the metal film layer to infrared light, the nano anti-reflection film is directly exposed and easily damaged, affecting the service life; using a coated conductive film for heating for defrosting and defogging results in a complex system, high energy consumption, and limited defrosting effect. The defrosting problem can be solved by using an air conditioner and windshield wipers. In addition, color differences are generated at the demembranation boundary of the conductive film, affecting the appearance; at the same time, the coating process has an adverse impact on the glass stress; in addition, the conductive film will generate electromagnetic shielding for the pulse signal emitted by the lidar.

[0038] Based on this, as Figures 1 - 5As shown in the figure, this embodiment provides a laminated glass for a transport vehicle, including a lidar 1 and a front windshield assembly. A frame is provided around the periphery of the front windshield assembly 2. A front windshield bracket 4 is provided at a position near the black ink area directly above the middle of the front windshield assembly. The front windshield bracket 4 is connected to a bracket cover 3. The bracket cover 3 and the front windshield bracket 4 are firmly connected by 6 pre-embedded studs. The plastic shell of the lidar 1 is pre-bonded and fixed to the bracket cover 3 by designing multiple rectangular glue storage groove structures and applying structural glue. Integrating the lidar 1 into the large bracket area of the windshield not only reduces wind resistance but also effectively protects the radar itself and improves the appearance of the whole vehicle. The front windshield includes an outer front windshield, an inner front windshield, and a thermoplastic interlayer 205 sandwiched between the outer front windshield and the inner front windshield. The front windshield glass, from the outside to the inside of the vehicle, is successively the first surface 201 and the second surface 202 of the outer front windshield, and the fourth surface 204 and the third surface 203 of the inner front windshield. The second surface 202 and the fourth surface 204 are arranged opposite to each other. Among them, the thermoplastic interlayer 205 is a non-metallic reflective heat-insulating material, generally an insulating PVB film, which has an obvious reflection effect on the near-infrared wavelength range, so as to achieve the purpose of reducing the solar energy entering the vehicle and improving the heat-insulating performance. By using the insulating PVB film, the heat-insulating performance of the non-intelligent driving vision area is taken into account, and at the same time, the adverse effects of other coatings such as coating on the glass stress are greatly reduced, and the reliability and safety of the product are improved. In addition, as Figure 3 and Figure 4 shown, in order not to affect the high transmittance of the near-infrared wavelength in the field of view angle area of the lidar 1 by the heat-insulating PVB film, an infrared high-transmittance PVB film 206 is spliced at the position of the black ink area directly above the heat-insulating PVB film to form an infrared high-transmittance area with a transmittance of infrared rays with wavelengths of 850nm - 1550nm greater than or equal to 90%. The infrared signal shielding problem caused by the metal coating layer is completely avoided through the splicing structure, and at the same time, the method is simple, the cost is low, and it is easy to industrialize. At the same time, the field of view angle of the lidar 1 provided on the third surface 203 of the inner front windshield is aligned with the infrared high-transmittance area, so that the infrared rays emitted by the lidar 1 have a transmittance of greater than or equal to 90% to the front windshield.

[0039] In this embodiment, in order to ensure that the near-infrared of the front windshield meets the sensing requirements of the lidar 1 and consider the loss caused by the reflection of the first surface and the fourth surface, and ensure that the infrared transmittance in the field of view angle area is greater than 90%, both the outer front windshield and the inner front windshield are made of ultra-clear glass original sheets with low absorption.

[0040] In this embodiment, to ensure that the lidar 1 can detect the cutting-in vehicle earlier, as Figure 5As shown in the figure, the horizontal field of view (HFOV) of the lidar 1 is set to be ≥120°; to ensure a detection distance of more than 100m, the vertical field of view (VFOV) of the lidar 1 is set to be ≥30°. At the same time, the installation angle of the front windshield on the vehicle will also affect the field of view of the lidar 1. To ensure sufficient detection distance, the installation angles of the outer front windshield and the inner front windshield are greater than or equal to 25°. The installation angles of the outer front windshield and the inner front windshield and the incident angle of the infrared rays emitted by the lidar 1 on the infrared highly transmissive area should satisfy the complementary relationship, which can effectively ensure that the above lidar device is used efficiently under a near-infrared transmittance of 85%; at the same time, it is recommended that the incident angle of the infrared rays emitted by the lidar 1 on the infrared highly transmissive area be 50° to 60°. In addition, the surface quality of the glass will also affect the detection and judgment time of the lidar 1. It is recommended that the radius of curvature of the outer front windshield and the inner front windshield be greater than or equal to 2000mm. In addition, through reasonable component layout, such as the front windshield installation angle of 30° and the lidar 1 incident angle of 60°, and adjusting the horizontal field of view (HFOV) of the lidar 1 to be ≥90° and the vertical field of view (VFOV) to be ≥10° to achieve a detection distance of more than 100m.

[0041] This embodiment also discloses an intelligent control system for a transport vehicle, as Figure 6 shown, including the laminated glass for a transport vehicle in any one of the above embodiments, and further including the vehicle body of the transport vehicle, the intelligent driving domain controller, the vehicle body domain controller, and the brake pedal actuator. The laminated glass for a transport vehicle is arranged on the vehicle body; the lidar 1 is connected to the intelligent driving pre-control through a wire harness and fixed on the front apron of the transport vehicle. The vehicle body domain controller is arranged on the front floor of the transport vehicle. The brake pedal actuator is fixed on the front cabin module of the transport vehicle. The main display screen is fixed on the instrument panel of the transport vehicle and is connected to the intelligent driving controller through a wire harness.

[0042] The lidar 1 is used to sense and feedback the position and speed signals of the moving object in front to the intelligent driving domain controller. The intelligent driving domain controller analyzes and judges and sends a braking signal to the vehicle body controller. The vehicle body controller then sends a braking instruction to the brake pedal actuator. The brake pedal actuator controls the friction between the brake pads and the brake discs to complete the braking action, and the transport vehicle completes braking.

[0043] Among them, the interaction method of the lidar 1 with the intelligent driving domain controller, the vehicle body domain controller, and the brake pedal actuator is as Figure 7 shown, including steps S100 to S700:

[0044] S100. Detect that there is a moving object that may intrude on the current vehicle driving path.

[0045] S200. The lidar 1 sends a pulse signal and captures the position and speed signals of the moving object in front and transmits them to the intelligent driving domain controller.

[0046] The S300 intelligent driving domain controller receives, analyzes and converts it into an image signal, and displays the image on the display screen.

[0047] S400: Determine whether the vehicle needs to urgently avoid moving objects.

[0048] S500: If the vehicle does not need to urgently avoid moving objects, end the current interaction; if the vehicle needs to urgently avoid moving objects, the intelligent driving domain controller outputs a braking signal to the body domain controller.

[0049] S600: The body domain controller responds to the intelligent driving domain controller and outputs a braking instruction to the brake pedal actuator.

[0050] S700: The brake pedal actuator drives the brake pads to complete the braking action.

[0051] In the various embodiments shown above, when the transport vehicle receives a movement signal, it controls the real-time distance, speed and other signals of pedestrians sensed and fed back by the radar distance on the top of the vehicle, converts them and sends them to the intelligent driving domain controller. The intelligent driving domain controller analyzes and judges and sends a braking signal to the body controller, and then sends a braking instruction to the brake pedal actuator electrical appliance to drive and control the friction between the brake pads and the brake disc to complete the braking action. Thus, the driving behavior is automatically controlled to achieve forward lateral collision warning and braking.

[0052] The above is only to illustrate the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, any modifications, equivalent replacements, improvements, etc. made without creative labor within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A laminated glass for a transport vehicle, comprising an outer windshield, an inner windshield, and a thermoplastic interlayer sandwiched between the outer windshield and the inner windshield, wherein the outer windshield has a first surface and a second surface, and the inner windshield has a third surface and a fourth surface, wherein the second surface is arranged opposite to the fourth surface, and wherein: The thermoplastic intermediate layer is partially spliced ​​with an infrared high-transmittance PVB film to form an infrared high-transmittance region with a transmittance of greater than or equal to 90% for infrared rays with a wavelength of 850nm-1550nm; A laser radar is arranged on the third surface of the inner windshield, and the field of view of the laser radar is aligned with the infrared high-transmittance area so that the infrared rays emitted by the laser radar have a transmittance greater than or equal to 90% on the windshield.

2. The laminated glass for transportation vehicles according to claim 1, characterized in that: The horizontal field of view of the laser radar is ≥120°, and the vertical field of view of the laser radar is ≥30°.

3. The laminated glass for transportation vehicles according to claim 1, characterized in that: The vehicle installation angle of the outer windshield and the inner windshield is greater than or equal to 25°.

4. The laminated glass for transportation vehicles according to claim 3, characterized in that: The installation angles of the outer windshield and the inner windshield and the incident angles of the infrared rays emitted by the laser radar on the infrared high-transmittance area satisfy a reciprocal relationship.

5. The laminated glass for transportation vehicles according to claim 4, characterized in that: The incident angle of the infrared rays emitted by the laser radar to the infrared high-transmittance area is 50° to 60°.

6. The laminated glass for transportation vehicles according to claim 1, characterized in that: The curvature radius of the outer windshield and the inner windshield is greater than or equal to 2000 mm.

7. The laminated glass for transportation vehicles according to claim 1, characterized in that: The thermoplastic intermediate layer is a non-metallic reflective heat insulating material.

8. The laminated glass for transportation vehicles according to claim 1, characterized in that: The outer windshield and the inner windshield are both made of ultra-clear glass.

9. An intelligent control system, characterized in that: The transport vehicle laminated glass comprises the laminated glass for transport vehicles as claimed in any one of claims 1 to 8, further comprising a vehicle body, a smart driving domain controller, a vehicle body domain controller and a brake pedal actuator, wherein the laminated glass for transport vehicles is arranged on the vehicle body; The laser radar is used to sense and feed back the position and speed signals of the moving object in front to the intelligent driving domain controller. The intelligent driving domain controller sends the braking signal to the body controller through analysis and judgment. The body controller then sends a braking command to the brake pedal actuator to complete the braking action.

10. The intelligent control system according to claim 9, characterized in that: The method for interacting the laser radar with the intelligent driving domain controller, the body domain controller and the brake pedal actuator also includes: Detecting that there is a moving object that may invade the current vehicle's driving path; The laser radar sends a pulse signal and captures the position and speed signals of the moving object in front and transmits them to the intelligent driving domain controller; The intelligent driving domain controller receives, analyzes and converts the image signal into an image signal, and displays the image on the display screen; Determine whether the vehicle needs to make emergency avoidance of moving objects; If the vehicle does not need to make emergency avoidance of moving objects, the interaction ends; if the vehicle needs to make emergency avoidance of moving objects, the intelligent driving domain controller outputs a braking signal to the body domain controller; The body domain controller responds to the intelligent driving domain controller and outputs a brake command to the brake pedal actuator; The brake pedal actuator drives the brake pads to complete the braking action.

Images