The present disclosure relates to radar technology area and, more particularly, to a radar device, a radar wireless rotating device, and an unmanned aerial vehicle (UAV).
With rapid development of unmanned aerial vehicle (UAV) technology and improvement of radar miniaturization technology, radar gradually becomes an important part of the UAV. An antenna assembly as a core component of the radar is driven by a drive mechanism when the radar is working, for example driven by an electric motor, to rotate around a rotation axis to detect obstacles of different directions. In conventional technologies, a cable is configured to connect the antenna assembly to an external power source to supply power to the antenna assembly. However, with this power supply method, due to limitation of the cable, a rotation angle of the drive mechanism is limited. For example, the rotation angle may only reach 270°. A rotation of 360° of the antenna assembly, such as an omnidirectional rotation, is not possible.
In accordance with the disclosure, there is provided an unmanned aerial vehicle (UAV) including a housing and a radar device. The radar device is mounted at the housing and includes a base, an antenna assembly, a power transmitter assembly, and a power receiver assembly. The antenna assembly is arranged at the base and configured to rotate relative to the base around a rotation axis. The power transmitter assembly is configured to convert electric power into electromagnetic energy and transmit the electromagnetic energy. The power receiver assembly is disposed at a distance from the power transmitter assembly, is electrically connected to the antenna assembly, and is configured to rotate with the antenna assembly, convert the electromagnetic energy into electric power, and transmit the electric power to the antenna assembly.
Hereinafter, technical solutions of the embodiments of the present disclosure are described clearly in connection with the drawings. The described embodiments are merely some of the embodiments of the present disclosure, but not all the embodiments. Based on the described embodiments of the disclosure, all other embodiments obtained by one of ordinary skill in the art without any creative effort are within the scope of the present disclosure.
In accordance with the present disclosure, a radar device, a wireless rotating device, and an unmanned aerial vehicle (UAV) are described in detail in connection with the drawings as follows. Features of below described embodiments and implementations may be combined as long as there is no conflict, and technical solutions created by combining the features of the embodiments and implementations are also embodiments of the present disclosure.
As shown in
In connection with the drawings, structures of the power receiver assembly and the power transmitter assembly, the cooperation of the power receiver assembly and the power transmitter assembly, and specific implementation principles and implementation processes of supplying power to the antenna assembly 120 are described in detail.
In the above-described radar device 100 shown in
The structures, working principles, and working processes of the power transmitter assembly and the power receiver assembly are described in detail.
As shown in
The power supply circuit board 210 is electrically connected to the transmitter control chip 220 and the transmitter current adjustment circuit 230 and can supply power to the transmitter control chip 220 and the transmitter current adjustment circuit 230. In the embodiments, current supplied by the power supply circuit board 210 is direct current (DC). An intensity of the DC may be constant or dynamically changed, which is not limited by the present disclosure. The transmitter control chip 220 is electrically connected to the transmitter current adjustment circuit 230 and may be configured to control the transmitter current adjustment circuit 230 to convert the received DC power into alternating current (AC) power with a preset frequency range.
The transmitter current adjustment circuit 230 is electrically connected to the transmitter coil 240 and can transmit the converted AC power to the transmitter coil 240. The transmitter coil 240 can convert the received AC power into electromagnetic energy and transmit the electromagnetic energy.
In one embodiment, to convert the DC power into the AC power with the preset frequency range, the above-described transmitter current adjustment circuit 230 may include a transmitter current conversion circuit and a resonance circuit. The transmitter current conversion circuit is electrically connected to the resonance circuit. The transmitter current conversion circuit may use an “inverter” principle to convert the DC power provided by the power supply circuit board 210 into the AC power and transmit the converted AC power to the resonance circuit. Further, the resonance circuit can adjust a frequency of the received AC power to the preset frequency range.
As shown in
In some embodiments, the electric power transmission efficiency is related to the distance between the transmitter coil 240 and the receiver coil 330. If the distance between the transmitter coil 240 and the receiver coil 330 is too small, a mutual inductance phenomenon occurs between the transmitter coil 240 and the receiver coil 330, which affects the transmission efficiency. If the distance between the transmitter coil 240 and the receiver coil 330 is too large, the transmission distance is long, which affects the transmission efficiency. Therefore, the distance between the transmitter coil 240 and the receiver coil 330 may need to be within an appropriate range. In some embodiments, the distance between the transmitter coil 240 and the receiver coil 330 is controlled to be in the distance range of 1.5 mm˜5 mm. For example, the distance between the transmitter coil 240 and the receiver coil 330 may be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, and 5.0 mm.
Further, based on the distance range between the transmitter coil 240 and the receiver coil 330, and in order to ensure the subsequent DC power provided by the power receiver assembly 300 to the antenna assembly 120 can satisfy the current intensity needed by the antenna assembly 120 during normal operation, embodiments of the present disclosure also provide a configuration described below.
In some embodiments, the electric power transmission efficiency is related to an inductance value of the transmitter coil 240. If the inductance value of the transmitter coil 240 is too large or too small, a coupling degree between the transmitter coil 240 and a capacitor is reduced, which affects the transmission efficiency. Therefore, the inductance value of the transmitter coil 240 may need to be within an appropriate range. In some embodiments, the inductance value of the above-described transmitter coil 240 may be controlled to be in the inductance value range of 8.5 uH˜11 uH. For example, the inductance value of the above-described transmitter coil 240 may be 8.5 uH, 8.6 uH, 8.7 uH, 8.8 uH, 8.9 uH, 9.0 uH, 9.1 uH, 9.2 uH, 9.3 uH, 9.4 uH, 9.5 uH, 9.6 uH, 9.7 uH, 9.8 uH, 9.9 uH, 10.0 uH, 10.1 uH, 10.2 uH, 10.3 uH, 10.4 uH, 10.5 uH, 10.6 uH, 10.7 uH, 10.8 uH, 10.9 uH, and 11.0 uH.
In some embodiments, the electric power transmission efficiency is related to an inductance value of the receiver coil 330. If the inductance value of the receiver coil 330 is too large or too small, a coupling degree between the receiver coil 330 and a capacitor is reduced, which affects the transmission efficiency. Therefore, the inductance value of the receiver coil 330 may need to be within an appropriate range. In some embodiments, the inductance value of the above-described receiver coil 330 may be controlled to be in the inductance value range of 7.5 uH˜11 uH. For example, the inductance value of the above-described receiver coil 330 may be 7.5 uH, 7.6 uH, 7.7 uH, 7.8 uH, 7.9 uH, 8.0 uH, 8.1 uH, 8.2 uH, 8.3 uH, 8.4 uH, 8.5 uH, 8.6 uH, 8.7 uH, 8.8 uH, 8.9 uH, 9.0 uH, 9.1 uH, 9.2 uH, 9.3 uH, 9.4 uH, 9.5 uH, 9.6 uH, 9.7 uH, 9.8 uH, 9.9 uH, 10.0 uH, 10.1 uH, 10.2 uH, 10.3 uH, 10.4 uH, 10.5 uH, 10.6 uH, 10.7 uH, 10.8 uH, 10.9 uH, and 11.0 uH.
In some embodiments, the electric power transmission efficiency is related to a frequency of the AC power. If the frequency of the AC power is too large or too small, power consumption of the power transmitter assembly 200 and/or the power receiver assembly 300 increases, which affects the transmission efficiency. Therefore, the frequency of the AC power may need to be within an appropriate range. In some embodiments, a preset frequency range may be 120 KHz˜150 KHz. For example, the above-described preset frequency may be 120 KHz, 121 KHz, 122 KHz, 123 KHz, 124 KHz, 125 KHz, 126 KHz, 127 KHz, 128 KHz, 129 KHz, 130 KHz, 131 KHz, 132 KHz, 133 KHz, 134 KHz, 135 KHz, 136 KHz, 137 KHz, 138 KHz, 139 KHz, 140 KHz, 141 KHz, 142 KHz, 143 KHz, 144 KHz, 145 KHz, 146 KHz, 147 KHz, 148 KHz, 149 KHz, and 150 KHz.
In the radar device shown in
In some embodiments, the antenna assembly 120 also needs to transmit the detected information to a ground station and receive request instructions sent from the ground station. Thus, embodiments of the present disclosure also provide wireless communication.
In some embodiments, the radar device shown in
Based on an above-described structure, the first wireless communication assembly 500 can be configured to transmit the information detected by the antenna assembly 120 to the second wireless communication assembly 400 and receive the request instructions sent by the second wireless communication assembly 400.
In connection with the drawings, the structures of each of the first wireless communication assembly 500 and the second wireless communication assembly 400, and the implementation principle and implementation process of the wireless communication therebetween are described in detail as follows.
In the embodiments of the present disclosure, considering the volume and the structure of the miniature radar, an integrated chip solution may be used to integrate the power transmitter assembly 200 and the second wireless communication assembly 400 shown in
As shown in
To implement wireless communication between the first antenna 520 and the second antenna 420, in one embodiment, the first antenna 520 may be a WIFI wireless antenna, and correspondingly, the second antenna 420 may also be a WIFI wireless antenna.
In another embodiment, the first antenna 520 may be a Bluetooth wireless antenna, and correspondingly, the second antenna 420 may also be a Bluetooth wireless antenna.
From a frequency band perspective, in one embodiment, the first antenna 520 may be a 2.4G wireless antenna, and correspondingly, the second antenna 420 may also be a 2.4G wireless antenna.
In another embodiment, the first antenna 520 may be a 5G wireless antenna, and correspondingly, the second antenna 420 may also be a 5G wireless antenna.
From a structure and shape perspective, in one embodiment, the first antenna 520 may be a plate antenna, and correspondingly, the second antenna 420 may also be a plate antenna.
With the above description, in the radar device shown in
The present disclosure also provides a radar wireless rotating device, which can include a base, an antenna assembly, a power transmitter assembly, and a power receiver assembly. The antenna assembly can be arranged at the base and rotate around a rotation axis relative to the base. The power transmitter assembly can be configured to convert electric power into electromagnetic energy and transmit the electromagnetic energy. The power receiver assembly is electrically connected to the antenna assembly and rotates with the antenna assembly. The power receiver assembly can be configured to convert received electromagnetic energy into electric power and transmit the converted electric power to the antenna assembly. A structure, working principles, working processes, and realized working effects of the radar wireless rotating device are similar to those of the radar device described above, which are not repeated here.
For a structure, working principles, working processes, and working effects of the radar device 620, reference may be made to relevant description above, which are not repeated here.
As shown in
In one embodiment, as shown in
Those skilled in the art should understand that fixedly connecting the above-described radar device 620 to the stand 640 is merely an example. In practical applications, the radar device 620 may be fixedly connected to another part, such as an arm 650, or a water tank.
Further, the UAV shown in
In an embodiment, the UAV shown in
For device embodiments, since the device embodiments basically correspond to method embodiments, reference may be made to corresponding description of the method embodiments. The above-described device embodiments are merely illustrative, where a unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, i.e., may be located at one place or be distributed to a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve purpose of solutions of the embodiments. Those of ordinary skill in the art can understand and implement the solutions of the embodiments without any creative effort.
In the present disclosure, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation and do not necessarily require or imply that such relationship or order exists between the entities or operations. The terms “including,” “comprising,” or any other variations cover a non-exclusive inclusion, such that a process, method, article, or device that includes a plurality of elements includes not only those elements but also other elements not listed, or elements that are inherent to such process, method, article, or device. In a situation without more limitations, an element associated with a phrase “include one . . . ” does not exclude presence of additional equivalent elements in the process, method, article, or device that includes the element.
The method and device provided by the embodiments of the present disclosure are described in detail above. The principles and implementations of the present disclosure are described with the specific examples. The description of the above embodiments is merely used to help to understand the methods and main ideas of the present disclosure. At the same time, for those of ordinary skill in the art, according to the ideas of the present disclosure, modifications may be made to specific embodiments and scope of applications. The present specification should not be construed as a limitation for the present disclosure.
This application is a continuation of International Application No. PCT/CN2017/117004, filed Dec. 18, 2017, the entire content of which is incorporated herein by reference.
Number | Date | Country | |
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Parent | PCT/CN2017/117004 | Dec 2017 | US |
Child | 16890627 | US |