CN-224216874-U - Laser radar heating defogging device

CN224216874UCN 224216874 UCN224216874 UCN 224216874UCN-224216874-U

Abstract

The utility model discloses a laser radar heating defogging device, and belongs to the technical field of laser radars. The laser radar heating defogging device comprises a transparent substrate, a transparent optical adhesive layer, a transparent protective layer, a nano silver transparent film and a plastic packaging layer which are sequentially stacked from bottom to top, wherein a potting adhesive layer is arranged on the side edge of the periphery of the transparent optical adhesive layer, the potting adhesive layer is positioned between the transparent substrate and the transparent protective layer, a containing cavity is formed in the transparent protective layer in a downward concave manner, the nano silver transparent film is arranged in the containing cavity, and the upper end face of the nano silver transparent film is flush with the upper end face of the transparent protective layer. The laser radar heating defogging device can realize the function of fast heating and defogging stable operation under safe voltage by adopting the nano transparent film, has high infrared light transmittance and good sealing property, and effectively improves long-term stability and effectiveness.

Inventors

CHEN ZHUO
LONG PAN
Ding Die
LEI ZHEN

Assignees

珠海纳金科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250527

Claims (7)

1. A laser radar heating defogging device is characterized by comprising a transparent substrate, a transparent optical adhesive layer, a transparent protective layer, a nano silver transparent film and a plastic packaging layer which are sequentially stacked from bottom to top, wherein potting adhesive layers are arranged on the peripheral side edges of the transparent optical adhesive layer and positioned between the transparent substrate and the transparent protective layer, a containing cavity is formed in the transparent protective layer in a downward concave mode, the nano silver transparent film is arranged in the containing cavity, and the upper end face of the nano silver transparent film is level with the upper end face of the transparent protective layer.
2. The lidar heating defogging device of claim 1, wherein the transparent substrate is one of PET, PI, CPI, PMMA, PC.
3. The laser radar heating defogging device of claim 1, wherein the thickness of the transparent optical adhesive layer is 10-200 μm.
4. The lidar heating defogging device of claim 1, wherein the transparent protective layer is one of polyurethane, acrylic, polyether, and polycarbonate.
5. The laser radar heating defogging device of claim 1, wherein the diameter of the nano silver wire in the nano silver transparent film is 8-50 nm, and the length is more than 5nm.
6. The lidar heating defogging device of claim 1 or 5, wherein the nano silver transparent film has a sheet resistance <100 Ω.
7. The lidar heating defogging device of claim 1, wherein the plastic encapsulation layer is one of PET, PI, CPI, PMMA, PC.

Description

Laser radar heating defogging device Technical Field The utility model relates to the technical field of laser radars, in particular to a laser radar heating defogging device. Background The laser radar is a receiving and transmitting array formed by a laser and a detector, realizes real-time perception of the surrounding environment of an automobile or a robot by means of light beam scanning, and is known as an 'eye' in the unmanned and robot fields. The real-time sensing capability enables the laser radar to accurately acquire the distance and contour information of surrounding objects, and provides powerful support for obstacle avoidance. Meanwhile, the laser radar combined with the high-precision map can also assist the automobile or the robot to realize centimeter-level positioning precision in the environment, so that autonomous navigation tasks are completed. The core performance of lidar is affected by a number of parameters including the number of beams, resolution, angle of view, and spot frequency. The difference in these parameters directly determines the ranging capability and perceived accuracy of the lidar. The number of the wire harnesses is one of important indexes for measuring the performance of the laser radar, and the more the number of the wire harnesses is, the more detailed the 3D outline of the object can be captured, so that the safety of intelligent driving is improved. However, in the actual use process, water vapor and fog can be generated inside and outside the laser radar due to severe changes of temperature and humidity, so that the laser radar is affected by the water fog, the ranging capability and the accuracy cannot work normally, and even data error deviation can be caused when serious, so that the driving safety is affected. Currently, existing lidars generally implement a heating defogging function through, for example, an Indium Tin Oxide (ITO) transparent conductive film. The transparent conductive film has good conductivity, high light transmittance in the visible light wave band and heating effect on the film under the condition of electrifying, thereby playing a role of removing fog. But indium of indium tin oxide is a scattered element, the reserve volume available for exploitation worldwide is about 1.5 ten thousand tons, the consumption in the electronic industry field is about 2000 tons each year, the risk of scarcity and exhaustion is faced, meanwhile, the preparation of indium tin oxide is difficult, the processing technology is complex and the cost is high. Moreover, since Indium Tin Oxide (ITO) is a semiconductor material, the main flow of the ITO film has an impedance value of about 150-300 ohms (Ω)/unit area, and this conductivity often requires that the heating voltage of the lidar be set between 30-100V to drive the temperature rise, and exceeds the safe voltage range, which affects the system safety and consumes more power. In addition, although the ITO material has a good transmittance in the visible light range, the transmittance of the laser radar in the infrared band is drastically reduced, and even for the laser radar with a wavelength of 1550nm or 905nm, the transmittance is reduced to 50% or less, and the requirement of infrared light with a transmittance of >85% cannot be satisfied, so that the ITO material cannot be used as a transparent heating module material for the laser radar. In contrast, nano silver has sufficient reserves, simpler preparation process and lower preparation and production cost, so nano silver wires are the best materials for replacing Indium Tin Oxide (ITO) and metal grids. In summary, there is a need to develop a laser radar heating defogging device based on nano silver, so as to solve the problems of high voltage, low infrared light transmittance and poor stability of the existing laser radar heating defogging device based on the ITO transparent conductive film. Disclosure of utility model In order to overcome the defects of the prior art, the utility model aims to provide the laser radar heating defogging device which can realize the function of fast heating and eliminating water mist under the stable operation of safe voltage by adopting the nano transparent film, and has high transmittance to infrared light and good long-term stability. In order to solve the problems, the technical scheme adopted by the utility model is as follows: The laser radar heating defogging device comprises a transparent substrate, a transparent optical adhesive layer, a transparent protective layer, a nano silver transparent film and a plastic packaging layer which are sequentially stacked from bottom to top, wherein a potting adhesive layer is arranged on the side edge of the periphery of the transparent optical adhesive layer, the potting adhesive layer is positioned between the transparent substrate and the transparent protective layer, a containing cavity is formed in the transparent protective layer in a downward concave mode, the nan