Transceiving module, laser radar and mobile device

Abstract

The embodiment of the invention discloses a transceiver module, a laser radar and a mobile device. The transceiver module comprises a circuit board, a first shielding member and a second shielding member. The circuit board comprises a board body and a transceiver device, the board body is provided with a first surface and a second surface which are arranged oppositely, and the transceiver device is arranged on the first surface; the first shielding piece covers the first surface, is provided with a light passing port corresponding to the transceiver device, and forms a first electromagnetic shielding cavity corresponding to the transceiver device; the second shielding piece covers the second surface, and the projection of the second shielding piece on the first surface covers the transceiver device; the first shielding piece and the second shielding piece form a second electromagnetic shielding cavity, and the circuit board is located in the second electromagnetic shielding cavity. Based on the transmit-receive module, the anti-interference capability of the circuit board to the electromagnetic radiation signal can be improved, so that the use reliability of the transmit-receive module is ensured.

Description

Technical Field

[0001] The present application relates to the field of laser radar technology, and in particular to a transceiver module, a laser radar and a movable device. Background Art

[0002] In the process of using LiDAR to measure target objects, semi-solid-state LiDAR is widely used in the vehicle field due to its advantages of high precision and longer service life. For example, it provides safer and more reliable distance and speed information for autonomous driving or assisted driving. At present, semi-solid-state LiDAR usually uses a large window to increase the viewing angle of the LiDAR. However, this may cause external electromagnetic radiation signals and other signals to enter the interior of the LiDAR through the large window, which does not meet the shielding requirements of the LiDAR under the Electro Magnetic Compatibility (EMC) requirements, and in severe cases, it will affect the normal operation of the LiDAR.

[0003] In the related art, a shielding cover is usually set on the circuit board inside the laser radar to shield electromagnetic radiation signals and other signals, and the volume of the shielding cover is usually set to be small to avoid deformation and welding difficulties caused by the shielding cover being too large. However, when the volume of the circuit board inside the laser radar is large, due to the small size of the shielding cover, it can only shield part of the area on the larger circuit board, and the shielding and anti-interference effects are poor. Summary of the invention

[0004] The embodiments of the present application provide a transceiver module, a laser radar and a movable device. Based on the transceiver module in the present application, the anti-interference ability of the circuit board to electromagnetic radiation signals can be improved to ensure the reliability of the use of the transceiver module.

[0005] In the first aspect, an embodiment of the present application provides a transceiver module, including a circuit board, a first shielding component and a second shielding component; the circuit board includes a board body and a transceiver device, the board body has a first surface and a second surface arranged opposite to each other, and the transceiver device is arranged on the first surface; the first shielding component is covered on the first surface, and has a first light-through port corresponding to the transceiver device, and the first shielding component forms a first electromagnetic shielding cavity corresponding to the transceiver device; the second shielding component is covered on the second surface, and the projection of the second shielding component on the first surface covers the transceiver device; the first shielding component and the second shielding component form a second electromagnetic shielding cavity, and the circuit board is located in the second electromagnetic shielding cavity.

[0006] In the above technical solution, the transceiver module that the present application can provide can form an independent first electromagnetic shielding cavity through a first shielding component, and the first electromagnetic shielding cavity can shield electromagnetic and other interference signals caused by other devices on the board except the transceiver device to ensure the reliability of the laser emission and reception of the transceiver device. At the same time, the first shielding component and the second shielding component can also constitute a second electromagnetic shielding cavity, and the second electromagnetic shielding cavity can shield electromagnetic and other interference signals outside the transceiver module to ensure the transceiver reliability of the transceiver module. In this way, the present application can form two electromagnetic shielding cavities through the first shielding component and the second shielding component, which can not only shield external interference signals, but also isolate the transceiver device separately, that is, shield the interference signals generated by the devices other than the transceiver device on the board, so as to further ensure the stability of the laser emitted and received by the transceiver device. In this way, through the two electromagnetic shielding cavities, the laser emitted and received by the transceiver module can be neither affected by external interference information nor by interference signals generated by other devices on the board, thereby improving the anti-interference ability of the transceiver module, thereby ensuring the stability of the laser emitted and received by the laser radar, that is, ensuring the detection reliability of the laser radar.

[0007] In combination with the first aspect, in some possible implementations, a first protrusion is provided on the first surface of the first shielding member facing the plate body, and the first protrusion is arranged around the first light opening, and the first protrusion forms a first electromagnetic shielding cavity corresponding to the transceiver device.

[0008] In the above technical solution, the first protrusion forms a first electromagnetic shielding cavity corresponding to the transceiver device, and the first electromagnetic shielding cavity can shield electromagnetic and other interference signals between other devices on the plate, that is, the first electromagnetic shielding device can shield interference signals other than the transceiver device to ensure the stability of the laser emitted and received by the transceiver device, to ensure the reliability of the emission and reception of the transceiver device, and thus to ensure the detection reliability of the laser radar. At the same time, the transceiver device can emit the laser to the third light port through the first light port to emit to the target object. Moreover, the echo light reflected by the target object can be captured by the laser radar through the third light port, and then can be emitted into the transceiver device through the first light port to realize the detection of the laser radar, so as to ensure the line reliability of the laser emitted and received by the transceiver device.

[0009] In combination with the first aspect, in some possible implementations, first copper exposed areas are respectively arranged around the periphery of the first and second surfaces of the board body, the first shielding component is continuously bonded to the first copper exposed area on the first surface, the second shielding component is continuously bonded to the first copper exposed area on the second surface, and the first copper exposed area forms a first shielding cavity for shielding external interference information.

[0010] In the above technical solution, the first shielding member is continuously attached to the first copper-exposed area on the first surface, and the second shielding member is continuously attached to the first copper-exposed area on the second surface, so that the first shielding member and the second shielding member can achieve the effect of grounding through the first copper-exposed area, so as to ensure the shielding reliability of the first shielding member and the second shielding member. The periphery of the first surface and the second surface of the board body can refer to the peripheral area where no circuit is set, and the first copper-exposed area is set in the peripheral area, which also prevents external interference signals from entering the transceiver module through the peripheral area, thereby affecting the reliability of the transceiver module receiving lasers.

[0011] In combination with the first aspect, in some possible implementations, the transceiver module further includes a fastener, and the fastener passes through the first copper exposed area to press the first shielding component and the second shielding component onto the circuit board.

[0012] In the above technical solution, by making the areas on the first shielding component and the second shielding component through which the fasteners pass correspond to the positions of the first copper exposed areas, the first shielding component and the second shielding component can achieve continuous surface contact with the circuit board, thereby ensuring the shielding effect of the second electromagnetic shielding cavity against external interference information, thereby ensuring the stability of the laser emitted and received by the transceiver module, and further ensuring the detection effect of the laser radar.

[0013] In combination with the first aspect, in some possible implementations, the transceiver module further includes a connector, which is disposed on the circuit board and passes through the first shielding component and / or the second shielding component, and the connector is located outside the first shielding cavity.

[0014] In the above technical solution, the connector is located outside the first shielding cavity. In this way, the wiring of each device in the first or second surface of the board can be connected to other modules in the laser radar through a connector to avoid the signals between the devices on the board from interfering with each other on the circuit board, thereby affecting the overall electromagnetic shielding effect of the transceiver module, so as to ensure the stability and reliability of the transceiver module in emitting and receiving lasers.

[0015] In combination with the first aspect, in some possible implementations, a second exposed copper area is arranged on the circuit board around the periphery of the connector, the first shielding component and / or the second shielding component are continuously bonded to the second exposed copper area, and the second exposed copper area forms a second shielding cavity for shielding external interference information.

[0016] In the above technical solution, taking the example of a second copper exposed area on the first surface, the second copper exposed area is continuously bonded to the first shielding component. At this time, the second copper exposed area forms a second shielding cavity, so that the first shielding component is used to place or pass through the first opening at the connector, and a second shielding cavity is also formed accordingly, which is used to shield external interference information to avoid the problem of external interference information entering the transceiver module through the first opening on the first shielding component, so as to ensure the reliability of the transceiver module in emitting and receiving lasers, thereby ensuring the detection reliability of the laser radar.

[0017] In combination with the first aspect, in some possible implementations, a second protrusion is provided on a surface of the first shielding member away from the circuit board, a second light passage is provided on the second protrusion, and the second light passage is communicated with the first light passage.

[0018] In the above technical solution, the echo light reflected by the target object can be captured by the laser radar through the third light port, and then can be emitted into the transceiver device through the second light port to achieve detection by the laser radar. In this way, the reliability of the line of the transceiver device emitting and receiving lasers is guaranteed.

[0019] In combination with the first aspect, in some possible implementations, the transceiver module further includes a filter, and the filter covers the second light passage.

[0020] In the above technical solution, the filter can filter the laser emitted and received by the transceiver device, remove other interference signals in the laser, and further ensure the stability and reliability of the laser emitted and received by the transceiver device.

[0021] In combination with the first aspect, in some possible implementations, the transceiver module further includes at least one heat conductive member, and the heat conductive member is disposed between the circuit board and the first shielding member, and / or between the circuit board and the second shielding member.

[0022] In the above technical solution, the heat generated by the transceiver module during use can be conducted to the first shielding component and / or the second shielding component through the heat conductor to achieve the heat dissipation effect, thereby avoiding the problem of excessive temperature of local components on the circuit board affecting the stability of the laser emitted and received by the transceiver component.

[0023] In the second aspect, an embodiment of the present application provides a laser radar, comprising a shell and a transceiver module described in any optional manner of the first aspect, the shell is provided with a third light port connecting the inner cavity of the shell with the outside world, the transceiver module is located in the shell, and the third light port is connected to the first light port.

[0024] In a third aspect, an embodiment of the present application provides a movable device, comprising a movable main body and a laser radar as described in any optional manner in the first aspect, wherein the laser radar is mounted on the main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description 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.

[0026] Figure 1 It is a schematic diagram of the framework structure of a laser radar provided in an embodiment of the present application;

[0027] Figure 2 It is a structural diagram of a transceiver module provided in an embodiment of the present application;

[0028] Figure 3 It is a schematic diagram of the decomposed structure of a transceiver module provided in an embodiment of the present application;

[0029] Figure 4 is a schematic cross-sectional structure diagram of a transceiver module provided in an embodiment of the present application;

[0030] Figure 5 is a schematic diagram of the decomposed structure of another transceiver module provided in an embodiment of the present application;

[0031] Figure 6 This is a schematic diagram of the decomposed structure of another transceiver module provided in an embodiment of the present application;

[0032] Figure 7 This is a schematic diagram of the decomposed structure of another transceiver module provided in an embodiment of the present application;

[0033] Figure 8 is a structural diagram of another transceiver module provided in an embodiment of the present application;

[0034] Fig. 9 This is a schematic diagram of the decomposed structure of another transceiver module provided in an embodiment of the present application;

[0035] Fig.10 is a structural diagram of another transceiver module provided in an embodiment of the present application;

[0036] Fig.11 This is a schematic diagram of the decomposed structure of another transceiver module provided in an embodiment of the present application;

[0037] Fig.12 It is a schematic diagram of the exploded structure of a circuit board provided in an embodiment of the present application.

[0038] Reference numerals:

[0039] 1. Shell; 1A. Third light-through port; 2. Transceiver module; 2A. Second electromagnetic shielding cavity; 21. Circuit board; 211. Board body; 212. Transceiver device; 213. First copper-exposed area; 213A. First shielding cavity; 214. Second copper-exposed area; 214A. Second shielding cavity; 22. First shielding member; 22A. First opening; 221. First raised portion; 221A. First electromagnetic shielding cavity; 222. Second raised portion; 222A. Second light-through port; 23. Second shielding member; 23A. Second opening; 24. Filter; 25. Fastener; 26. Connector. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0041] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached embodiments.

[0042] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0043] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0044] Before introducing the embodiments of the present application, the professional terms that may be involved in the embodiments of the present application are explained below.

[0045] Lidar: A radar system that uses laser beams to detect the position, speed and other characteristic quantities of a target. Its working principle is to emit a detection signal (laser beam) to the target object, and then compare the received signal reflected from the target object (echo signal) with the detection signal (or local oscillator signal). After appropriate processing, relevant information about the target object relative to the Lidar can be obtained, such as distance, direction, height, speed, attitude, and even shape parameters.

[0046] Semi-solid-state lidar: usually divided into one-dimensional scanning and two-dimensional scanning, that is, changing the direction of the laser through internal moving mirrors.

[0047] Transceiver module: includes a transmitting module and a receiving module. The transmitting module is used to transmit a detection optical signal to the target object, and the receiving module is used to receive an echo optical signal reflected from the target object. The transceiver module can be a polarization beam splitter, an optical circulator, and an optical chip integrating a transmitting waveguide and a receiving waveguide, etc., which is not limited in this application.

[0048] In the process of using LiDAR to measure target objects, semi-solid-state LiDAR is widely used in the vehicle field due to its advantages of high precision and longer service life. At present, since semi-solid-state LiDAR changes the direction of the laser through reflection of internal movement, the object of the LiDAR is usually provided with a larger window to increase the emission area of ​​the laser, that is, to increase the viewing angle of the LiDAR. However, there are usually electromagnetic radiation signals and other signals in the air, which may cause electromagnetic radiation signals and other signals to be mixed in the laser signal when the LiDAR emits and receives the laser. In this way, the shielding property of the LiDAR under the EMC requirements is not met, which will affect the detection effect of the LiDAR, and in severe cases, it will affect the normal operation of the LiDAR.

[0049] Moreover, laser radars are usually equipped with multiple circuits of multiple modules, such as light source modules, wave combining modules, spectrometer modules, amplification modules, transceiver modules, scanning modules, photoelectric detection modules and signal processing modules, etc. There may be electromagnetic interference between each module and the components of each module, which will affect each module. In severe cases, it will also affect the laser emitted and received by the transceiver module, resulting in instability of the emitted and received laser signals, affecting the detection effect of the laser radar.

[0050] In the related art, a shielding cover is usually set on the circuit board inside the laser radar to shield electromagnetic radiation signals and other signals. However, since there are usually multiple modules in the laser radar, in order to avoid deformation and difficulty in welding due to the large size of the shielding cover, the volume of the shielding cover is usually set to be smaller. In this way, only some modules and devices can be shielded, the shielding and anti-interference effects are poor, and the welding steps of the shielding cover are cumbersome.

[0051] To this end, the embodiments of the present application provide a laser radar transceiver module, a laser radar and a movable device, which can improve the circuit board's anti-interference ability to electromagnetic radiation signals to ensure the reliability of the transceiver module, and can solve the problem in related technologies that electromagnetic interference causes instability in the emitted and received laser signals, affecting the laser radar detection effect.

[0052] The following is an exemplary introduction to the laser radar transceiver module, laser radar and movable device provided in the present application with reference to the accompanying drawings.

[0053] For example, Figure 1 As shown, the laser radar provided in the embodiment of the present application may include a housing 1 and a transceiver module 2, the transceiver module 2 is arranged in the housing 1, and the housing 1 is provided with a third light opening (such as Figure 1 As shown in 1A), the third light port 1A is used for passing laser. Here, it can be understood that the laser refers to the detection light and the echo light. The detection light is emitted by the transceiver module 2, and the echo light is received by the transceiver module 2.

[0054] In one example, Figure 2 As shown, the transceiver module 2 provided in the embodiment of the present application may include a circuit board 21, a first shielding member 22 and a second shielding member 23, wherein the first shielding member 22 and the second shielding member 23 are respectively arranged on both sides of the circuit board 21 to form a second electromagnetic shielding cavity (such as Figure 2 2A), the second electromagnetic shielding cavity 2A is used to shield the external electromagnetic radiation signal and other interference signals to prevent the interference signal from entering the transceiver module 2 and affecting the reliability of the transceiver module 2 receiving and emitting the laser. In this way, the present application can form a second electromagnetic shielding cavity 2A through the first shielding member 22 and the second shielding member 23, and the second electromagnetic shielding cavity 2A can shield the external electromagnetic radiation signal and other interference signals outside the transceiver module 2, that is, the interference signal will not enter the circuit board 21, thereby ensuring the stability of the laser emitted and received by the transceiver module 2, and ensuring the detection reliability of the laser radar.

[0055] Here, it is worth noting that the transceiver module 2 provided in the embodiment of the present application may include only one transmitting module or one receiving module, or may include both a transmitting module and a receiving module, wherein the transmitting module includes a transmitting drive circuit and a transmitter, and the receiving module includes a receiver and a receiving drive and processing circuit. Exemplarily, when the transceiver module 2 includes a transmitting module and a receiving module, in order to avoid electromagnetic interference between the transmitting module and the receiving module, it is necessary to electromagnetically isolate the transmitting module and the receiving module, that is, an electromagnetic isolation groove may be provided between the transmitting module and the receiving module to isolate the transmitting drive circuit and the receiving drive and processing circuit, thereby ensuring the reliability of the laser emitted by the transmitting module and the laser received by the receiving module, and avoiding the problem of mutual interference. At the same time, it is also necessary to isolate the third optical port 1A, that is, corresponding independent optical ports need to be provided for different modules or light shielding plates are provided between the transmitter and the receiver, so that an independent optical channel is formed between the transmitting module and the receiving module, so as to avoid the laser emitted by the transmitter in the transmitting module causing optical crosstalk to the receiver in the receiving module, and further ensure the reliability of the laser emitted or received by different modules. If the transceiver module 2 only includes a transmitting module or a receiving module, there is no need to set up an additional isolation slot. The specific composition of the transceiver module 2 can be set according to actual needs, and this application does not make any specific restrictions on this.

[0056] In one example, Figure 3 As shown, the circuit board 21 may include a board body 211 and a transceiver device 212, the board body 211 having a first surface and a second surface arranged opposite to each other, the first shielding component 22 is covered on the first surface of the board body 211, the second shielding component 23 is covered on the second surface of the board body 211, and the projection of the second shielding component 23 on the first surface can cover the transceiver device 212, so that the first shielding component 22 and the second shielding component 23 can constitute a second electromagnetic shielding cavity 2A to shield external electromagnetic radiation signals and other interference signals, thereby ensuring the stability of the laser emitted and / or received by the transceiver module 2.

[0057] Here, it can be understood that the transceiver device 212 may also include only at least one transmitting device or at least one receiving device, or may include at least one transmitting device and at least one receiving device at the same time. For details, reference may be made to the specific composition of the above-mentioned transceiver module 2, and no further description is given for this. Among them, at least one transmitting device constitutes a transmitting device group, and at least one receiving device constitutes a receiving device group.

[0058] In this example, the transceiver device 212 is arranged on the first surface, and the transceiver device 212 is used to emit and / or receive laser. In order to ensure that the transceiver device 212 can emit and receive laser, optionally, a first light-through port (such as Figure 3 22A), the transceiver 212 can emit the laser to the outside of the transceiver module 2 through the first light port 22A. It can be understood that the first light port 22A corresponds to the third light port 1A of the housing 1, that is, when the transceiver 212 is a transmitting device, the laser can be emitted to the third light port 1A through the first light port 22A to emit to the target object. Moreover, when the transceiver 212 includes a receiving device, the echo light reflected by the target object can be captured by the laser radar through the third light port 1A, and then can be emitted into the receiving device through the first light port 22A to achieve the detection of the laser radar, so as to ensure the line reliability of the transceiver 212 emitting and / or receiving laser.

[0059] Here, it is worth noting that other devices are also provided on the board 211, and other devices can be connected by wiring, and this application does not make specific restrictions. Electromagnetic interference may also exist between other devices on the board 211, so that electromagnetic interference may be caused to the transceiver device 212 on the board 211, so that the stability of the laser emitted or received by the transceiver device 212 is affected. Therefore, in order to prevent the transceiver device 212 from being electromagnetically interfered by other devices on the board 211, the first shielding member 22 can also form a first electromagnetic shielding cavity corresponding to the transceiver device 212, and the first electromagnetic shielding cavity can shield electromagnetic and other interference signals between other devices on the board 211 to avoid affecting the laser emitted or received by the transceiver device 212, that is, the first electromagnetic shielding cavity can shield signals other than the transceiver device 212 to ensure the stability of the laser emitted and / or received by the transceiver device 212, thereby ensuring the detection reliability of the laser radar.

[0060] In one example, if Figure 4 As shown, the first shielding member 22 is provided with a first protrusion 221 on the first surface facing the plate body 211, and the first protrusion 221 is arranged around the first light opening 22A. At this time, the first protrusion 221 forms a first electromagnetic shielding cavity (such as Figure 4 As shown in Figure 221A), the first electromagnetic shielding cavity 221A shields electromagnetic and other interference signals between other devices on the board 211, that is, the first electromagnetic shielding device 221A can shield interference signals other than the transceiver device 212 to ensure the stability of the laser emitted and received by the transceiver device 212, ensure the reliability of the emission and reception of the transceiver device 212, and further ensure the detection reliability of the laser radar.

[0061] Optionally, the first protrusion 221 may be an integrated structure with the first shielding member 22, or may be fixedly connected to the first shielding member 22 by fasteners such as screws, and the material of the first protrusion 221 may be the same material as the first shielding member 22, or may be a different material. It is worth noting that the connection relationship between the first protrusion 221 and the first shielding member 22 and the material may be set and selected according to actual needs, and this application does not impose any specific restrictions on this.

[0062] In the transceiver module 2 provided in the present application, an independent first electromagnetic shielding cavity 221A can be formed by the first shielding component 22. The first electromagnetic shielding cavity 221A can shield electromagnetic and other interference signals caused by other devices on the board 211 except the transceiver device 212 to ensure the reliability of the laser emission and reception of the transceiver device. At the same time, the first shielding component 22 and the second shielding component 23 can also constitute a second electromagnetic shielding cavity 2A. The second electromagnetic shielding cavity 2A can shield electromagnetic and other interference signals outside the transceiver module 2 to ensure the transceiver reliability of the transceiver module 2. In this way, the present application can form two electromagnetic shielding cavities through the first shielding component 22 and the second shielding component 23, which can not only shield external interference signals, but also isolate the transceiver device 212 separately, that is, shield the interference signals generated by the devices on the board 211 except the transceiver device 212, so as to further ensure the stability of the laser emitted and received by the transceiver device 212. In this way, through the two electromagnetic shielding cavities, the laser emitted and received by the laser radar can be neither affected by external interference information nor by interference signals generated by other devices on the board 211, thereby improving the anti-interference ability of the transceiver module, thereby ensuring the stability of the laser emitted and received by the laser radar, that is, ensuring the detection reliability of the laser radar.

[0063] Further, such as Figure 5 As shown, a second protrusion 222 is provided on a surface of the first shielding member 22 away from the circuit board 21, and a second light-through opening (such as Figure 5As shown in Figure 222A), the second optical port 222A is connected to the first optical port 22A, so that the transceiver 212 can emit the laser to the outside of the transceiver module 2 through the first optical port 22A and the second optical port 222A. It can be understood that the second optical port 222A also corresponds to the third optical port 1A of the housing 1, that is, when the transceiver 212 includes a transmitting device, the transmitting device in the transceiver 212 can emit the laser to the third optical port 1A through the second optical port 222A to emit to the target object. Moreover, when the transceiver 212 includes a receiving device, the echo light reflected by the target object can be captured by the laser radar through the third optical port 1A, and then can be emitted into the receiving device in the transceiver 212 through the second optical port 222A and the first optical port 22A to achieve the detection of the laser radar. In this way, the line reliability of the transceiver 212 emitting and / or receiving laser is guaranteed.

[0064] Optionally, the transceiver module 2 may further include a small window piece that covers the second light-through port 222A to prevent impurities such as water vapor in the air from entering the transceiver device 212 through the second light-through port 222A, thereby affecting the reliability of the transceiver device 212, while ensuring the overall aesthetics of the transceiver module 2.

[0065] Optional, such as Figure 6 As shown, the transceiver module 2 may also include a filter 24, which may cover the second light port 222A. The filter 24 may absorb certain light bands in the light wave or accurately select a small range of light bands to pass through, and absorb other undesirable bands. That is, the filter 24 provided in the embodiment of the present application may filter the laser emitted and / or received by the transceiver device 212, remove other interference signals in the laser, and further ensure the stability and reliability of the laser emitted and / or received by the transceiver device 212.

[0066] When the transceiver device 212 is a receiving device, in order to ensure the shielding reliability of the first shielding member 22 and the second shielding member 23, a condition needs to be met, that is, the first shielding member 22 and the second shielding member 23 need to be grounded. For this purpose, in an example, Figure 7As shown, the periphery of the first surface and the second surface of the plate body 211 provided in the embodiment of the present application is respectively surrounded by a first copper exposed area 213. The first shielding member 22 is continuously attached to the first copper exposed area 213 on the first surface, and the second shielding member 23 is continuously attached to the first copper exposed area 213 on the second surface, so that the first shielding member 22 and the second shielding member 23 can achieve a grounding effect through the first copper exposed area 213 to ensure the shielding reliability of the first shielding member 22 and the second shielding member 23. Here, it can be understood that the periphery of the first surface and the second surface of the plate body 211 can refer to a peripheral area where no circuit is set, and the first copper exposed area 213 is set in the peripheral area, and at the same time, it also avoids the problem that external interference signals enter the transceiver module 2 through the peripheral area, thereby affecting the reliability of the transceiver module 2 in receiving the laser. That is, at this time, the first copper exposed area 213 forms a first shielding cavity (such as Figure 7 213A), is used to shield external interference information to prevent external interference information from entering the transceiver module 2 through the peripheral area, so as to ensure the reliability of the transceiver module 2 in emitting and / or receiving lasers, thereby ensuring the detection reliability of the laser radar.

[0067] Here, it is worth noting that when the transceiver module 2 provided in the embodiment of the present application only includes a transmitting module, there is no need to set the first copper exposed area 213. When a receiving module is provided in the transceiver module 2, a corresponding first copper exposed area 213 needs to be set.

[0068] In one example, if Figure 8 As shown, the transceiver module 2 may also include a fastener 25, which is used to press the first shielding component 22 and the second shielding component 23 to the circuit board 21, so that the first shielding component 22 and the second shielding component 23 can confine the circuit board 21 within the second electromagnetic shielding cavity 2A formed by the two, while ensuring the firmness of the connection between the two, and ensuring that the second electromagnetic shielding cavity 2A is shielded from external interference information.

[0069] Optionally, the first shielding member 22 and the second shielding member 23 may be made of metal material, which has high hardness, and the fastener 25 may be a screw, bolt, etc., and the present application does not make any specific limitation on this.

[0070] Optionally, in order to further enhance the connection firmness between the first shielding member 22 and the second shielding member 23 so that they can be further pressed against the circuit board 21, a plurality of through holes may be correspondingly provided on the first shielding member 22 and the second shielding member 23, and the plurality of through holes may be connected by fasteners 25 to further enhance the connection firmness between the first shielding member 22 and the second shielding member 23.

[0071] In order to avoid the possibility of a gap between the first shielding member 22 and the second shielding member 23 and the circuit board 21 when they are fixedly connected by the fastener 25, that is, when the fastener 25 is used for connection, there is a certain non-contact surface between the area on the first shielding member 22 for passing the fastener 23 and the area on the second shielding member 23 for passing the fastener 23 and the circuit board 21, which may cause external electromagnetic radiation signals and other interference signals to enter the circuit board 21 through the gap, thereby affecting the electromagnetic interference capability of the second electromagnetic shielding cavity 2A. In one example, as Fig. 9 As shown, the first shielding member 22 and the second shielding member 23 may be provided with through holes at the first copper-exposed area 213, and the fasteners pass through the through holes at the first copper-exposed area 213, thereby pressing the first shielding member 22 and the second shielding member 23 to the circuit board 21. In this way, the area on the first shielding member 22 for passing through the fasteners 23 and the area on the second shielding member 23 for passing through the fasteners 23 can also achieve continuous surface contact with the circuit board 21 through the first copper-exposed area 213, so as to avoid the problem that there is a gap between the first shielding member 22 and the second shielding member 23 and the circuit board 21, and the electromagnetic radiation signal and other interference signals from the outside enter the circuit board 21 through the gap. In this way, by making the area on the first shielding member 22 and the second shielding member 23 through the fasteners 25 correspond to the position of the first copper-exposed area 213, the first shielding member 22 and the second shielding member 23 can achieve continuous surface contact with the circuit board 21, thereby ensuring the shielding effect of the second electromagnetic shielding cavity 2A on external interference information, ensuring the stability of the laser emitted and received by the transceiver module 2, and further ensuring the detection effect of the laser radar.

[0072] Other devices may also be disposed on the board body 211 of the circuit board 21 provided in the embodiment of the present application to prevent the signals between these devices from interfering with each other, thereby affecting the electromagnetic shielding effect of the entire transceiver module 2. In one example, Fig.10 As shown, the transceiver module 2 provided in the embodiment of the present application may also include a connector 26, and the connector 26 is arranged on the circuit board 21. Here, it is worth explaining that only one connector 26 may be provided, corresponding to passing through the first shielding component 22, or corresponding to passing through the second shielding component 23, so that the wiring of each device on the first side or the second side of the board 211 can be connected to other modules in the laser radar through the connector 26. Two connectors 26 may also be provided, one of which passes through the first shielding component 22, and the other passes through the second shielding component 23, so as to respectively connect the wiring of each device on the first side and the second side with other modules in the laser radar. The actual number of settings can be selected according to demand, and this application does not make specific restrictions on this. Fig.10As shown, the connector 26 is located outside the first shielding cavity 213A. In this way, the wiring of each device in the first surface or the second surface of the board body 211 can be connected to other modules in the laser radar through a connector 26 to avoid the signals between the devices on the board body 211 interfering with each other on the circuit board 21, thereby affecting the overall electromagnetic shielding effect of the transceiver module 2, so as to ensure the stability and reliability of the transceiver module 2 in emitting and / or receiving lasers.

[0073] For example, it is assumed that the present application is provided with two connectors 26, such as Fig.11 As shown, the first shielding member 22 may be provided with a first opening (such as Fig.11 22A), one of the connectors 26 is located at the first opening 22A, and the first shielding member 22 may be provided with a second opening (as shown in FIG. Fig.11 As shown in FIG23A), another connector 26 is located at the second opening 23A to connect the wiring of each device on the first side or the second side of the board 211 to other modules in the laser radar.

[0074] In order to avoid the problem that the first shielding member 22 and the second shielding member 23 are placed or pass through the connector 26, the shielding effect of the second electromagnetic shielding cavity 2A is affected due to the existence of an opening. Fig.12 As shown, a second copper-exposed area 214 is arranged around the periphery of the connector 26 on the circuit board 21. Here, it is worth noting that the second copper-exposed area 214 can be arranged on the first surface or the second surface of the board body 211, and continuously bonded with the first shielding member 22 or the second shielding member 23 to achieve a shielding effect, or both the first surface and the second surface are arranged, and continuously bonded with the first shielding member 22 and the second shielding member 23 to achieve a shielding effect. This application does not make any specific restrictions on this. For example, Fig.11 As shown, taking the second surface provided with the second copper exposed area 214 as an example, the second copper exposed area 231 is continuously attached to the first shielding member 22. At this time, the second copper exposed area 214 forms a second shielding cavity (such as Fig.12 As shown in 214A), the first shielding member 22 is used to be placed on or pass through the first opening 22A at the connector 26, and a second shielding cavity 214A is correspondingly formed to shield external interference information, so as to avoid the problem that external interference information enters the transceiver module 2 through the first opening 22A on the first shielding member 22, so as to ensure the reliability of the transceiver module 2 in emitting and receiving lasers, thereby ensuring the detection reliability of the laser radar.

[0075] In summary, the transceiver module 2 provided in the present application can form a second electromagnetic shielding cavity 2A through the first shielding member 22 and the second shielding member 23 to perform a first layer of shielding on the entire circuit board 21, so as to avoid the problem that the circuit board 21 is interfered by external electromagnetic radiation signals and other interference signals; the first shielding member 22 can also form a first electromagnetic shielding cavity 221A to perform a second layer of shielding on the transceiver device 212 on the board 211, so as to avoid the problem that the transceiver device 212 is interfered by electromagnetic and other interference signals of other devices on the board 211. At the same time, when the transceiver module 2 is a receiving module, the first shielding member 22 and the second shielding member 23 are also provided with a first copper-exposed area 213 and a second copper-exposed area 214, so as to form a first shielding cavity 213A and a second shielding cavity 214A, so that the first shielding member 22 and the second shielding member 23 can achieve continuous surface bonding with the circuit board 21 through the first copper-exposed area 213, so as to ensure grounding reliability, and at the same time, the first shielding cavity 213A and the second shielding cavity 214A are used to shield other positions that may cause interference information to enter. In this way, the present application can form multiple shielding cavities through the first shielding component 22 and the second shielding component 23 to shield the interference signal, thereby ensuring the stability and reliability of the transceiver module 2 in receiving the laser, and further ensuring the reliability of the laser radar detection.

[0076] The transceiver module 2 generates a certain amount of heat when in use, which may cause local devices on the circuit board 21, for example, the transceiver device 211 to have an overly high temperature, which may seriously affect the stability of the laser emitted and received by the transceiver device 211. To this end, in one example, the transceiver module 2 also includes at least one heat conductor, and the circuit board 21 can be connected to the first shielding member 22 or the second shielding member 23 through the heat conductor to release the heat. Here, it is worth noting that in order to save manufacturing costs, a heat conductor can be set on the first surface or the second surface of the board body 211 so that the heat can be discharged through the first shielding member 22 or the second shielding member 23. Alternatively, in order to improve the heat dissipation effect, a heat conductor can be set on the first surface and the second surface of the board body 211 at the same time, so that the heat can be discharged through the first shielding member 22 and the second shielding member 23. The number and position of the heat conductor can be selected according to actual needs, and this application does not make specific restrictions. In this way, the heat generated by the transceiver module 2 during use can be conducted to the first shielding component 22 and / or the second shielding component 23 through the heat conductor to achieve the heat dissipation effect, thereby avoiding the problem of excessive temperature of local components on the circuit board 21, which affects the stability of the laser emitted and received by the transceiver component 211.

[0077] It should be noted here that the above is an exemplary introduction to the laser radar provided in the embodiment of the present application. Technicians can delete, replace or add new devices according to actual conditions. This application does not make any specific restrictions on this.

[0078] The embodiment of the present application also provides a movable device, which includes the laser radar in the above embodiment and a movable device body, and the laser radar is mounted on the device body. The beneficial effects that can be achieved by the movable device include the beneficial effects that can be achieved by the above laser radar, which will not be described in detail.

[0079] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0080] In the embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0081] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A laser radar transceiver module, characterized in that: include: A circuit board, comprising a board body and a transceiver device, wherein the board body has a first surface and a second surface disposed opposite to each other, and the transceiver device is disposed on the first surface; A first shielding member, which is covered on the first surface and has a first light-through port corresponding to the transceiver device, and the first shielding member forms a first electromagnetic shielding cavity corresponding to the transceiver device; as well as A second shielding member, disposed on the second surface, wherein a projection of the second shielding member on the first surface covers the transceiver device; The first shielding member and the second shielding member form a second electromagnetic shielding cavity, and the circuit board is located in the second electromagnetic shielding cavity.

2. The transceiver module according to claim 1, characterized in that: The first shielding member is provided with a first protruding portion on the first surface facing the plate body, and the first protruding portion is arranged around the first light opening, and the first protruding portion forms the first electromagnetic shielding cavity corresponding to the transceiver device.

3. The transceiver module according to claim 1, characterized in that: The first surface and the second surface of the board body are respectively surrounded by first exposed copper areas, the first shielding component is continuously attached to the first exposed copper area on the first surface, and the second shielding component is continuously attached to the first exposed copper area on the second surface. The first exposed copper area forms a first shielding cavity for shielding external interference information.

4. The transceiver module according to claim 3, characterized in that: The transceiver module further includes a fastener, which passes through the first copper exposed area and is used to press the first shielding component and the second shielding component onto the circuit board.

5. The transceiver module according to claim 1, characterized in that: The transceiver module also includes a connector, which is arranged on the circuit board and passes through the first shielding component and / or the second shielding component. The connector is located outside the first shielding cavity.

6. The transceiver module according to claim 5, characterized in that: A second copper-exposed area is arranged on the circuit board around the periphery of the connector, the first shielding component and / or the second shielding component are continuously bonded to the second copper-exposed area, and the second copper-exposed area forms a second shielding cavity for shielding external interference information.

7. The transceiver module according to any one of claims 1 to 6, characterized in that: A second protrusion is disposed on a surface of the first shielding member away from the circuit board. A second light passage is disposed on the second protrusion. The second light passage is communicated with the first light passage.

8. The transceiver module according to claim 7, characterized in that: The transceiver module further includes a filter, and the filter covers the second light passage.

9. The transceiver module according to claim 7, characterized in that: The transceiver module further includes at least one heat-conducting member, and the heat-conducting member is arranged between the circuit board and the first shielding member, and / or between the circuit board and the second shielding member.

10. A laser radar, characterized in that: include: A shell, wherein the shell is provided with a third light opening connecting the inner cavity of the shell with the outside; as well as The transceiver module according to any one of claims 1 to 9, wherein the transceiver module is located in the housing, and the third light passage is connected to the first light passage.

11. A movable device, characterized in that: It comprises a movable main body and a laser radar as described in claim 10, wherein the laser radar is mounted on the main body.

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