Laser radar test system
By using a single-layer translucent panel and heating device in the lidar test system, the problem of inaccurate lidar environmental reliability test results and susceptible to adverse effects in the prior art is solved, and a more stable and reliable test environment is achieved, ensuring the accuracy of the test results.
Patent Information
- Application Number
- CN202420671018.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The environmental reliability testing methods of existing lidars have problems such as inaccurate test results and the test process is susceptible to adverse effects. This is mainly because the double-layer vacuum glass windows of the constant temperature and humidity box weaken and reflect the laser energy, resulting in the door opening test, which affects the stability of the test environment.
A single-layer translucent panel is used to close the window of the test box, and a heating device is set up around it to heat the single-layer translucent panel. Combined with an external hot air blowing device, it ensures the transmittance and environmental stability of the single-layer translucent panel.
Through the combination of a single-layer light-transmitting panel and heating device, the weakening and reflection of laser energy are reduced, the instability of the door opening test to the environment is avoided, the stability and reliability of the test environment are improved, and the accuracy of the test results are ensured.
Smart Images
Figure CN222599835U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of laser radar technology, and more specifically, to a laser radar testing system. Background Art
[0002] The environmental reliability test of LiDAR is a crucial performance test in the field of LiDAR testing. At present, the environmental reliability test of LiDAR has not been standardized, and the testing technology is not yet mature. The environmental reliability test of LiDAR, such as high and low temperature, is often carried out in the following way: the tester opens the door of the temperature chamber during the test to allow the laser to be emitted, and then conducts the performance test of the radar. This is because the windows of the constant temperature and humidity chambers on the market are mostly made of double-layer vacuum glass, which greatly weakens and reflects the laser energy. In order to ensure the normal emission of the laser, the only way is to use the "open door test".
[0003] However, the environmental reliability test method of the LiDAR in the prior art has the following defects: First, opening the door will connect the inside of the incubator with the outside world, causing the temperature inside the incubator to change, which causes instability in the test environment and makes the test results inaccurate; Second, the bigger problem is that the temperature difference between the inside and outside of the incubator at the moment the door is opened will quickly cause the LiDAR window to fog or frost, causing interference with the laser emission of the LiDAR, thereby preventing the laser from emitting, adversely affecting the test process and bringing great difficulty to the test. Utility Model Content
[0004] The main purpose of the utility model is to provide a laser radar test system, which aims to solve the technical problems of poor test result accuracy and susceptibility of the test process to adverse effects in the environmental reliability test method of the laser radar in the prior art.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a laser radar test system, wherein the laser radar test system includes:
[0006] A test box, used to accommodate the laser radar to be tested, wherein a window connecting the inside and outside of the test box is provided on the body wall of the test box;
[0007] A single-layer light-transmitting panel, which is installed at the window and closes the window;
[0008] The heating device is arranged in the peripheral area of the single-layer light-transmitting panel to heat the single-layer light-transmitting panel.
[0009] Furthermore, the single-layer light-transmitting panel is a single-layer glass panel.
[0010] Furthermore, the laser radar test system also includes a hot air blowing device located outside the test box, and the hot air blowing device can blow hot air to the outer surface of the single-layer light-transmitting panel.
[0011] Furthermore, the laser radar testing system includes two hot air blowing devices, and the two hot air blowing devices are respectively arranged on two opposite sides of the single-layer light-transmitting panel.
[0012] Furthermore, the heating device comprises an electric heating wire, and the electric heating wire is attached to the single-layer light-transmitting panel.
[0013] Furthermore, the heating device comprises a plurality of electric heating wires, and the plurality of electric heating wires are evenly distributed in the peripheral area of the single-layer light-transmitting panel.
[0014] Furthermore, the laser radar test system also includes a constant temperature and humidity system, which includes a control unit, a temperature detection sensor, a humidity detection sensor and a constant temperature and humidity execution system arranged inside the test box, and the temperature detection sensor, the humidity detection sensor and the constant temperature and humidity execution system are all connected to the control unit signal.
[0015] Furthermore, the laser radar testing system also includes a rotatable base arranged inside the test box, and the laser radar to be tested is fixed on the rotatable base.
[0016] Furthermore, the laser radar testing system also includes a lifting mechanism and a horizontal telescopic driving device connected to the rotatable base.
[0017] Furthermore, the laser radar testing system also includes an anti-reflection film arranged on the inner surface and / or outer surface of the single-layer light-transmitting panel.
[0018] The beneficial effects of the laser radar test system provided by this application are:
[0019] In the laser radar test system provided by the embodiment of the utility model, on the one hand, the window of the test box is closed with a single-layer light-transmitting panel instead of double-layer glass. The attenuation and reflection of the laser energy caused by the single-layer light-transmitting panel itself are much smaller than those of the double-layer glass. After the single-layer light-transmitting panel is adopted, there is no need to adopt the "open door test" method, so that the laser radar is always in the closed environment of the test box during the test, and the test environment is very stable. During the test, the laser emission will not be interfered with by the "open door test"; on the other hand, the heating device is arranged in the peripheral area of the single-layer light-transmitting panel to heat the single-layer light-transmitting panel, so that the fogging of the surface of the single-layer light-transmitting panel at high temperature and the frost at low temperature can be alleviated by heating the single-layer light-transmitting panel, so as to ensure the transmittance of the single-layer light-transmitting panel, and the phenomenon when the laser emitted by the laser radar is emitted through the single-layer light-transmitting panel is avoided as much as possible. The stability and reliability of the test environment of the laser radar test system are improved, so when the laser radar test system provided by the embodiment of the utility model is used to perform relevant tests of the laser radar, the test results are more accurate, true and effective.
[0020] In a further solution, the laser radar test system also includes a hot air blowing device located outside the test box body, which can blow hot air to the side of the single-layer light-transmitting panel outside the test box body, further eliminating frosting on the surface of the single-layer light-transmitting panel at low temperatures, ensuring the transmittance of the single-layer light-transmitting panel, and cooperating with the heating device to improve the test environment stability, reliability, and accuracy of the test results of the laser radar test system. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0022] Figure 1 A simplified schematic diagram of a lidar test system provided for one embodiment of the present application.
[0023] The reference numerals in the above drawings are as follows:
[0024] 1- Test box;
[0025] 2-LiDAR;
[0026] 3- Single-layer light-transmitting panel;
[0027] 4-hot air blowing device;
[0028] 5-Electric heating wire;
[0029] 6- Rotatable base. DETAILED DESCRIPTION
[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0031] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0034] In order to illustrate the technical solution described in this application, a detailed description is given below in conjunction with specific drawings and embodiments.
[0035] See also Figure 1 The present invention provides a laser radar test system, wherein the laser radar test system comprises:
[0036] A test box 1, the interior of the test box 1 is used to accommodate the laser radar 2 to be tested, and a window connecting the interior and the exterior of the test box 1 is provided on the body wall of the test box 1;
[0037] A single-layer light-transmitting panel 3 is installed at the window to seal the window;
[0038] The heating device is disposed in the peripheral area of the single-layer light-transmitting panel 3 to heat the single-layer light-transmitting panel 3 .
[0039] In the laser radar test system provided by the embodiment of the utility model, on the one hand, the window of the test box 1 is closed with a single-layer light-transmitting panel 3 instead of double-layer glass. The attenuation and reflection of the laser energy caused by the single-layer light-transmitting panel 3 itself are much smaller than those of the double-layer glass. After the single-layer light-transmitting panel 3 is adopted, there is no need to adopt the "open door test" method, so that the laser radar 2 is always in the closed environment of the test box 1 during the test, and the test environment is very stable. During the test, the laser emission will not be interfered with due to the "open door test"; on the other hand, the heating device is arranged in the peripheral area of the single-layer light-transmitting panel 3 to heat the single-layer light-transmitting panel 3, so that the phenomenon of fogging on the surface of the single-layer light-transmitting panel 3 at high temperature and frosting at low temperature can be alleviated by heating the single-layer light-transmitting panel 3, so as to ensure the transmittance of the single-layer light-transmitting panel 3. When the laser emitted by the laser radar 2 is emitted through the single-layer light-transmitting panel 3, it is avoided as much as possible to be adversely affected, thereby improving the stability and reliability of the test environment of the laser radar test system, so that when the laser radar test system provided by the embodiment of the utility model is used to perform relevant tests on the laser radar 2, the test results are more accurate, true and effective.
[0040] According to an embodiment of the present invention, the single-layer light-transmitting panel is a single-layer glass panel, where "glass" can be ordinary glass, quartz glass, tempered glass, etc. In addition, the single-layer light-transmitting panel can also be other materials with high light transmittance and low refractive index. This embodiment does not impose any restrictions on the specific material of the single-layer light-transmitting panel.
[0041] According to a preferred embodiment of the utility model, the laser radar test system also includes a hot air blowing device 4 located outside the test box 1, and the hot air blowing device 4 can blow hot air to the outer surface of the single-layer light-transmitting panel 3, which can further eliminate the frosting phenomenon on the surface of the single-layer light-transmitting panel 3 at low temperatures, ensure the transmittance of the single-layer light-transmitting panel 3, and cooperate with the heating device to jointly improve the test environment stability, reliability, and accuracy of the test results of the laser radar test system. It can be understood that the outer surface of the single-layer light-transmitting panel 3 refers to the surface of the single-layer light-transmitting panel 3 on the side opposite to the outside of the test box 1, and the inner surface of the single-layer light-transmitting panel 3 refers to the surface of the single-layer light-transmitting panel 3 on the side opposite to the inside of the test box 1.
[0042] As a specific embodiment, the hot air blowing device 4 can be a hot air curtain, a hair dryer or the like.
[0043] According to one embodiment of the utility model, the laser radar test system also includes two hot air blowing devices 4, and the two hot air blowing devices 4 are respectively arranged on two opposite sides of the single-layer light-transmitting panel 3, so that the hot air can cover the outer surface of the single-layer light-transmitting panel 3 more effectively and comprehensively. Of course, more hot air blowing devices 4 can be arranged around the single-layer light-transmitting panel 3 as needed. By arranging more hot air blowing devices 4 around the single-layer light-transmitting panel 3, the outer surface of the single-layer light-transmitting panel 3 can be blown with hot air from multiple directions and multiple points.
[0044] In this embodiment, a hot air blowing device 4 can be provided on the outer surface of the body wall of the test box 1 at positions corresponding to the upper and lower sides of the single-layer light-transmitting panel 3. Of course, a hot air blowing device 4 can also be provided on the outer surface of the body wall of the test box 1 at positions corresponding to the left and right sides of the single-layer light-transmitting panel 3. For example, when the laser radar system is used to perform a low-temperature test on the laser radar, since the temperature in the box may be much lower than the external ambient temperature, fog will form on the outside of the single-layer light-transmitting panel, affecting the laser emission; at this time, the hot air blowing device can be used to blow air to the outside of the single-layer light-transmitting panel to blow away the fog on the surface of the single-layer light-transmitting panel.
[0045] It is understandable that the hot air blowing device 4 is not limited to having only the hot air blowing function, but may also have the cold air blowing function to meet more diversified needs.
[0046] According to a specific embodiment of the utility model, the heating device includes an electric heating wire 5, which can generate heat when connected to a power source. The electric heating wire 5 is attached to the single-layer light-transmitting panel 3. The heating device is not limited to including the electric heating wire 5, but can also include other equipment for heating the single-layer light-transmitting panel 3, such as an electric heating tube, an electric heating net, etc.
[0047] Furthermore, the heating device includes a plurality of electric heating wires 5, which are evenly distributed in the peripheral area of the single-layer light-transmitting panel 3, so as to better heat various parts of the single-layer light-transmitting panel 3. Specifically, the electric heating wires 5 can be plated around the single-layer light-transmitting panel 3, and the electric heating wires 5 are embedded with the glass inside the window of the test box 1. In some other embodiments, the electric heating wires can also be embedded with the glass outside the window of the test box 1.
[0048] According to a specific embodiment of the utility model, the laser radar test system also includes a constant temperature and humidity system, which includes a control unit, a temperature detection sensor, a humidity detection sensor and a constant temperature and humidity execution system arranged inside the test box 1, and the temperature detection sensor, the humidity detection sensor and the constant temperature and humidity execution system are all connected to the control unit signal.
[0049] In this embodiment, since the laser radar test system adopts a constant temperature and humidity system, and the temperature detection sensor, the humidity detection sensor and the constant temperature and humidity execution system are all connected to the control unit signal, it is convenient to control the constant temperature and humidity execution system in real time to change or maintain the internal temperature and humidity of the test box 1 according to the internal temperature and humidity information of the test box 1 detected by the temperature detection sensor and the humidity detection sensor, so that the test box 1 becomes a constant temperature and humidity box. The constant temperature and humidity execution system may include humidifiers, heating and cooling devices, etc., which can enable the test box 1 to provide various test environments such as high temperature, low temperature, constant humidity and heat.
[0050] It can be understood that the constant temperature and humidity execution system can be directly set in the test box 1, or it can be set outside the test box 1 and connected to the inside of the test box 1 through pipeline equipment. Of course, it is preferably set in the test box 1, which is professional and convenient for more rapid and direct execution of operations to change or maintain the internal temperature and humidity of the test box 1.
[0051] According to an embodiment of the present invention, the transmittance of the single-layer light-transmitting panel 3 is greater than or equal to 99%, such as 99%, 99.5%, 99.9%, and can be close to 100% for best.
[0052] According to one embodiment of the utility model, the laser radar test system also includes an anti-reflection film arranged on the outer surface and the inner surface of the single-layer light-transmitting panel 3 relative to the test box 1, which can further improve the transmittance of the single-layer light-transmitting panel 3, and ensure that the transmittance of the single-layer light-transmitting panel 3 of the anti-reflection film is greater than or equal to 99%, for example, 99%, 99.5%, 99.9%, and can be close to 100% optimally, so as to minimize the energy attenuation of the laser passing through the single-layer light-transmitting panel 3 to the greatest extent, so that the laser is almost completely emitted.
[0053] According to one embodiment of the present invention, the thermal conductivity of the single-layer light-transmitting panel 3 is greater than or equal to 1.1 W / (m·K), for example, 1.2 W / (m·K), and the maximum operating temperature of the single-layer light-transmitting panel 3 is greater than or equal to 400°C, for example, 450°C.
[0054] According to a specific embodiment of the utility model, the single-layer light-transmitting panel 3 can be made of high borosilicate glass, which has a thermal conductivity of 1.2W / (m·K) and good thermal conductivity. In addition, it has a low thermal expansion coefficient, strong resistance to thermal shock, and an excellent long-term operating temperature of up to 450°C. It can work stably and well at high temperatures without fogging on the glass surface.
[0055] As another embodiment, the single-layer light-transmitting panel 3 is not limited to using high borosilicate glass, and other replaceable glass materials with similar performance may also be used.
[0056] According to one embodiment of the utility model, the laser radar test system also includes a rotatable base 6 arranged inside the test box 1, and the laser radar 2 to be tested is fixed on the rotatable base 6. The rotatable base 6 can be specifically connected to a horizontal rotation drive mechanism so that it can rotate in a horizontal plane. The rotatable base 6 can specifically adopt the structural form of an electric two-dimensional turntable. Of course, it does not rule out the form in which the rotatable base 6 can rotate in other directions.
[0057] In addition, a structure such as a clamp for more firmly fixing the laser radar 2 to be tested may be provided on the rotatable base 6 .
[0058] As an embodiment, the rotatable base 6 is not limited to rotation only. The laser radar test system also includes a lifting mechanism and a horizontal telescopic drive device connected to the rotatable base 6 to drive the rotatable base 6 to move horizontally and lift vertically to meet more diversified position change requirements.
[0059] In this embodiment, the horizontal telescopic drive device and the vertical lifting drive device can both adopt devices such as cylinders and electric push rods.
[0060] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A laser radar test system, characterized in that: The laser radar test system comprises: A test box, used to accommodate the laser radar to be tested, wherein a window connecting the inside and outside of the test box is provided on the body wall of the test box; A single-layer light-transmitting panel, which is installed at the window and closes the window; The heating device is arranged in the peripheral area of the single-layer light-transmitting panel to heat the single-layer light-transmitting panel.
2. The laser radar test system according to claim 1, characterized in that: The single-layer light-transmitting panel is a single-layer glass panel.
3. The laser radar test system according to claim 1, characterized in that: The laser radar test system also includes a hot air blowing device located outside the test box, and the hot air blowing device can blow hot air to the outer surface of the single-layer light-transmitting panel.
4. The laser radar test system according to claim 3, characterized in that: The laser radar testing system includes two hot air blowing devices, which are respectively arranged on two opposite sides of the single-layer light-transmitting panel.
5. The laser radar test system according to claim 1, characterized in that: The heating device comprises an electric heating wire, and the electric heating wire is attached to the single-layer light-transmitting panel.
6. The laser radar test system according to claim 5, characterized in that: The heating device comprises a plurality of electric heating wires, and the plurality of electric heating wires are evenly distributed in the peripheral area of the single-layer light-transmitting panel.
7. The laser radar test system according to any one of claims 1 to 6, characterized in that: The laser radar test system also includes a constant temperature and humidity system, which includes a control unit, a temperature detection sensor, a humidity detection sensor and a constant temperature and humidity execution system arranged inside the test box, and the temperature detection sensor, the humidity detection sensor and the constant temperature and humidity execution system are all connected to the control unit signal.
8. The laser radar test system according to any one of claims 1 to 6, characterized in that: The laser radar testing system also includes a rotatable base arranged inside the test box, and the laser radar to be tested is fixed on the rotatable base.
9. The laser radar test system according to claim 8, characterized in that: The laser radar testing system also includes a lifting mechanism and a horizontal telescopic driving device connected to the rotatable base.
10. The laser radar test system according to any one of claims 1 to 6, characterized in that: The laser radar testing system further includes an anti-reflection film arranged on the inner surface and / or outer surface of the single-layer light-transmitting panel.