Window assembly installed on vehicle-mounted laser radar

A vehicle-mounted lidar and window technology, which is applied to vehicle components, transportation and packaging, transparent/reflective heating devices, etc. Avoid problems such as frost or fogging, and achieve high transmittance, increased cost, and high heating power density

Active Publication Date: 2021-08-13
NINGBO YONGXIN OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although improved impact resistance, high cost hinders high-volume applications
[0004] In addition, in the low-temperature and high-humidity environment of cold weather and humid weather, the surface of the optical window of the lidar is also prone to icing, frosting or fogging, which greatly reduces the transmittance of the optical window of the lidar, scattering and interfering with the signal Increase, resulting in shortened detection distance, serious cause system failure

Method used

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  • Window assembly installed on vehicle-mounted laser radar
  • Window assembly installed on vehicle-mounted laser radar
  • Window assembly installed on vehicle-mounted laser radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment one: if figure 1 As shown, a window assembly installed on a vehicle-mounted laser radar includes an outer sapphire substrate 4 and an inner H-K9L optical glass substrate 6, and a PVB polymer is arranged between the sapphire substrate 4 and the H-K9L optical glass substrate 6 The interlayer 5, the sapphire substrate 4 and the optical glass substrate 6 are bonded through the PVB polymer interlayer 5 to form a window assembly.

[0035] Specific to the sapphire substrate 4, the outer surface of the sapphire substrate 4 is coated with a waterproof anti-reflection film 1, which is used to reduce the reflection of visible light and at the same time to increase the reflection of the radar band (the radar working band is 905nm±30nm or 1550nm±30nm), and the spectral characteristics Such as figure 2 and image 3 As shown; the inner surface of the sapphire substrate 4 is coated with a black film 2. The function of this film is to ensure the consistency of the appearan...

Embodiment 2

[0044] Embodiment 2: Other structures are the same as Embodiment 1, the difference is that the heating defogging structure 7 is as Figure 11 As shown, the outer surface of the H-K9L optical glass substrate 6 is plated with an ITO conductive film 10, and on the ITO conductive film 10, the heating electrode strip 8 made of thick film paste and the electrode connected to the heating electrode strip 8 are coated. The terminal conductor 9 is a terminal conductor 9 used for connecting control systems such as an external power supply. The heating and defogging structure of this embodiment has a more uniform heating effect, but the overall transmittance is slightly lower than that of the heating and defogging structure of Embodiment 1, and the cost is somewhat increased.

[0045] Specifically, the heating electrode 8 in the above two embodiments is coated with thick film slurry, the width is 1mm~5mm, the total resistance is controlled at 10~200 ohms, the resistance range can also be in...

Embodiment 3

[0048] Embodiment three: other structures are the same as embodiment two, the difference is that the thickness of the sapphire substrate 4 is 0.5mm, the thickness of the H-K9L optical glass substrate 6 is 5.14mm, and the thickness of the polymer interlayer is 0.36mm. The total thickness of the window assembly is equal to 6 mm, and the cost per piece of the window assembly is 200 yuan.

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Abstract

The invention discloses a window assembly mounted on a vehicle-mounted laser radar, which comprises a sapphire substrate on the outer side and an optical glass substrate on the inner side, and is characterized in that a polymer laminated layer made of polyvinyl butyral resin or ethylene-vinyl acetate copolymer is arranged between the sapphire substrate and the optical glass substrate; the sapphire substrate and the optical glass substrate are bonded through the polymer laminated layer to form the window assembly, the thickness of the sapphire substrate is 0.5 mm-1. 5mm, the thickness of the optical glass substrate is greater than 2mm, the thickness of the polymer laminated layer is 0.36 mm-0. 40mm, and the total thickness of the window assembly is less than or equal to 6mm. The window assembly has the advantages that the two substrates made of specific materials are bonded through the specific polymer laminated layer to form the window assembly, and by means of the elastic impact absorption effect of the middle polymer laminated layer, the penetration of an impact object can be effectively prevented, and the cost of the device is greatly reduced.

Description

technical field [0001] The invention relates to a vehicle laser radar, in particular to a window assembly installed on the vehicle laser radar. Background technique [0002] Lidar is a new type of sensor, which is a general term for laser active detection sensor equipment. Its main working principle is to realize three-dimensional scanning measurement and imaging of the target outline through high-frequency ranging and scanning angle measurement. Compared with common auxiliary driving sensors such as cameras and millimeter-wave radars, lidar has powerful spatial three-dimensional resolution capabilities. [0003] The ideal installation position of the vehicle-mounted lidar on the car is generally behind the air intake grille of the front of the car. Therefore, the optical window of the lidar may be impacted by various hard objects such as gravel splashed on the road when the vehicle is running. Fragmentation may cause the lidar to fail and affect driving safety. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481B60R11/02H05B3/84
CPCB60R11/0258G01S7/481H05B3/84
Inventor 张克奇邱慧毛磊杨勇姬凌马浩斌孙国峰
Owner NINGBO YONGXIN OPTICS
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