CN210724786U - Signal transmission device, unmanned aerial vehicle and unmanned aerial vehicle system - Google Patents
Signal transmission device, unmanned aerial vehicle and unmanned aerial vehicle system Download PDFInfo
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- CN210724786U CN210724786U CN201922328379.XU CN201922328379U CN210724786U CN 210724786 U CN210724786 U CN 210724786U CN 201922328379 U CN201922328379 U CN 201922328379U CN 210724786 U CN210724786 U CN 210724786U
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Abstract
The application discloses signal transmission device, signal transmission device includes antenna, radio frequency chip, power amplifier and switch. The antenna is used for transmitting or receiving radio frequency signals. The radio frequency chip comprises a first terminal and a second terminal, and the first terminal and the second terminal can output radio frequency signals. The power amplifier is connected with the first terminal and is used for processing the radio-frequency signal output by the first terminal. The switch is connected with the antenna and can be switched between a first state and a second state. In the first state, the switch is connected with the power amplifier and the antenna, and the antenna transmits the radio-frequency signal processed by the power amplifier. In the second state, the switch is connected with the second terminal and the antenna, and the antenna transmits the radio-frequency signal output by the second terminal. The application also discloses an unmanned aerial vehicle and an unmanned aerial vehicle system. When the switch is in the second state, the power amplifier does not work, and the power consumption of the signal transmission device can be reduced.
Description
Technical Field
The application relates to the technical field of communication equipment, more particularly, relates to a signal transmission device, unmanned aerial vehicle and unmanned aerial vehicle system.
Background
Along with the development of wireless picture transmission technique and unmanned aerial vehicle technique, combine two kinds of techniques and obtained very big application in professional fields such as aerial photography, electric power inspection, survey and drawing, FPV flight and plant protection. The unmanned aerial vehicle image transmission module is required to have the characteristics of miniaturization, low power consumption, long image transmission distance and the like. The unmanned aerial vehicle is miniaturized to carry more payloads, the unmanned aerial vehicle is low in power consumption to have longer endurance time, and the image transmission distance is long to adapt to more application scenes. When the current unmanned aerial vehicle is in a near field (an operator debugs the unmanned aerial vehicle or starts and stands), the power of the current unmanned aerial vehicle is generally the same as that of a far field, so that the power consumption of the near field is too high.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a signal transmission device, an unmanned aerial vehicle and an unmanned aerial vehicle system.
The signal transmission device of the embodiment of the application comprises an antenna, a radio frequency chip, a power amplifier and a switch. The antenna is used for transmitting or receiving radio frequency signals. The radio frequency chip comprises a first terminal and a second terminal, and the first terminal and the second terminal can output radio frequency signals. The power amplifier is connected with the first terminal and is used for processing the radio-frequency signal output by the first terminal. The switch is connected with the antenna and can be switched between a first state and a second state; in the first state, the switch is connected with the power amplifier and the antenna, and the antenna transmits the radio-frequency signal processed by the power amplifier; in the second state, the switch is connected with the second terminal and the antenna, and the antenna transmits the radio-frequency signal output by the second terminal.
In some embodiments, the signal transmission device further includes a processing chip, the processing chip is connected to the radio frequency chip, and the processing chip is configured to control the radio frequency chip to output a radio frequency signal; the processing chip is connected with the power amplifier and is used for controlling the power amplifier to process the radio-frequency signal; the processing chip is connected with the switch, and the processing chip is used for controlling the switch to be kept in the first state or the second state.
In some embodiments, the power amplifier may amplify the rf signal output by the first terminal with any one of a plurality of gains, and the processing chip is configured to control the gain of the power amplifier according to an external input, where the external input includes a distance between the drone and a remote communication device, and the remote communication device is in communication connection with the drone through the rf signal.
In some embodiments, the signal transmission device further includes a power supply, the power supply is connected to the processing chip, the radio frequency chip, and the power amplifier, and the power supply provides power for the processing chip, the radio frequency chip, and the power amplifier.
The unmanned aerial vehicle of this application embodiment includes organism and above-mentioned any embodiment signal transmission device, signal transmission device installs on the organism.
In some embodiments, the drone further comprises a temperature sensor for detecting a temperature of the airframe; the signal transmission device is connected with the temperature sensor; and the signal transmission device controls the switch to be kept in the second state after the temperature sensor detects that the temperature of the machine body is greater than the temperature threshold for a preset time.
The unmanned aerial vehicle system of this application embodiment includes above-mentioned any embodiment unmanned aerial vehicle and remote communication equipment, remote communication equipment with signal transmission device communication connection.
In some embodiments, the signal transmission means is responsive to a first instruction to maintain the switch in the first state, the first instruction being generated in response to any of: receiving a user instruction for entering a high-power mode, wherein the temperature of the machine body is less than a temperature threshold value; the distance between the remote communication equipment and the unmanned aerial vehicle is greater than a distance threshold value.
In some embodiments, the signal transmission device is responsive to a second instruction to maintain the switch in the second state, the second instruction being generated in response to any of: receiving a user instruction to enter a low power mode; or the temperature of the body is greater than a temperature threshold for a predetermined length of time; or the distance between the remote communication equipment and the unmanned aerial vehicle is smaller than a distance threshold value.
The signal transmission device, unmanned aerial vehicle and unmanned aerial vehicle system of this application embodiment, radio frequency chip include first terminal and second terminal, and first terminal and second terminal homoenergetic are all can export radio frequency signal. The switch can be switched between a first state and a second state, the switch is connected with the power amplifier and the antenna in the first state, and the antenna transmits the radio-frequency signal processed by the power amplifier; in the second state, the switch is connected with the second terminal and the antenna, and the antenna transmits the radio-frequency signal output by the second terminal. The signal transmission device can realize long-distance and high-quality transmission in the first state, and can enable the power amplifier not to work in the second state, thereby reducing the power consumption of the signal output device. In addition, a loop is not formed between the power amplifier and the switch, and the isolation degree of the switch does not influence the working state of the power amplifier.
Additional aspects and advantages of embodiments of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an unmanned aerial vehicle system according to an embodiment of the present application;
fig. 2 is a schematic plan view of a telecommunications device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a signal transmission device according to an embodiment of the present application.
Description of the main element symbols:
the unmanned aerial vehicle system 1000, the unmanned aerial vehicle 100, the signal transmission device 10, the antenna 11, the radio frequency chip 12, the first terminal 121, the second terminal 122, the power amplifier 13, the switch 14, the processing chip 15, the power supply 16, the body 20, the imaging device 30, the pan-tilt 40, the temperature sensor 50, the remote communication equipment 200, and the touch screen 210.
Detailed Description
Embodiments of the present application will be further described below with reference to the accompanying drawings. The same or similar reference numbers in the drawings identify the same or similar elements or elements having the same or similar functionality throughout.
In addition, the embodiments of the present application described below in conjunction with the accompanying drawings are exemplary and are only for the purpose of explaining the embodiments of the present application, and are not to be construed as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, the drone system 1000 includes a drone 100 and a remote communication device 200, the drone 100 includes a signal transmission apparatus 10, and the remote communication device 200 is in communication connection with the drone 100, specifically, the remote communication device 200 is in communication connection with the signal transmission apparatus 10. The remote communication device 200 may be a remote controller, a mobile phone, a tablet, a head display device, a smart watch, a supply station, or the like, which is not limited herein. In the embodiment shown in fig. 1, the telecommunication device 200 is a remote control, and in the embodiment shown in fig. 2, the telecommunication device 200 is a mobile phone or tablet. Remote communication equipment 200 can remote control unmanned aerial vehicle 100, specifically, remote communication equipment 200 can watch the operating parameter of unmanned aerial vehicle 100, and remote communication equipment 200 can also control unmanned aerial vehicle 100's operating condition, and remote communication equipment 200 can also control the operating condition of the load that carries on unmanned aerial vehicle 100.
Unmanned aerial vehicle 100 includes organism 20 and signal transmission device 10, and signal transmission device 10 installs on organism 20. The unmanned aerial vehicle 100 may be a movable platform such as an unmanned aerial vehicle, an unmanned ship, etc., and the unmanned aerial vehicle 100 is taken as an example to illustrate the embodiment of the present application, it is to be understood that the type of the unmanned aerial vehicle 100 may also be other, and the limitation of the present application is not to be understood. The drone 100 may be a multi-rotor drone, such as a quad-rotor drone, a six-rotor drone, an eight-rotor drone, a twelve-rotor drone, etc., the drone 100 may be used to carry loads to accomplish predetermined tasks, such as carrying the imaging device 30 to take a picture, carrying pesticides, nutrient solutions, and spraying devices to perform plant protection tasks, etc.
Specifically, organism 20 is unmanned aerial vehicle 100's main part, and organism 20 includes frame, horn and foot rest, and the frame can be regarded as installation carriers such as flight control system, treater, camera, cloud platform, and the horn can be used to carry driving system, rotor, screw etc. and provide flight power for unmanned aerial vehicle 100, provides the support when the foot rest can descend for unmanned aerial vehicle 100. The signal transmission device 10 may be mounted on the machine body, may be mounted on the machine arm, and may also be mounted on the machine frame, which is not limited herein.
Referring to fig. 1, the remote communication device 200 is in communication connection with the signal transmission apparatus 10, and the remote communication device 200 may transmit a radio frequency signal to the drone 100 and may also receive a radio frequency signal transmitted by the drone 100. The remote communication device 200 controls the drone 100, such as the control signal transmission means 10, by transmitting radio frequency signals to the drone 100. In one example, the remote communication device 200 is a mobile phone, and the user can control the drone 100 through the APP on the mobile phone, and further control the signal transmission apparatus 10. In another example, the remote communication device 200 is a remote controller, and the user can control the drone 100 through a button, a joystick, a touch screen, etc. on the remote controller, further controlling the signal transmission apparatus 10.
Referring to fig. 3, the signal transmission apparatus 10 includes an antenna 11, a radio frequency chip 12, a power amplifier 13 and a switch 14. The antenna 11 is used for transmitting or receiving a radio frequency signal, the radio frequency chip 12 includes a first terminal 121 and a second terminal 122, and both the first terminal 121 and the second terminal 122 can output the radio frequency signal. The power amplifier 13 is connected to the first terminal 121, and the power amplifier 13 is configured to process the radio frequency signal output by the first terminal 121. The switch 14 is connected to the antenna 11, and the switch 14 can be switched between a first state and a second state. In the first state, the switch 14 is connected to the power amplifier 13 and the antenna 11, the antenna 11 transmits the rf signal processed by the power amplifier 13, and in the second state, the switch 14 is connected to the second terminal 122 and the antenna 11, and the antenna 11 transmits the rf signal output from the second terminal 122.
In the signal transmission device 10 according to the embodiment of the present invention, both the first terminal 121 and the second terminal 122 of the rf chip 12 can output rf signals. The switch 14 is connected with the antenna 11, the switch 14 can be switched between a first state and a second state, the switch 14 is connected with the power amplifier 13 and the antenna 11 in the first state, and the antenna 11 transmits the radio-frequency signal processed by the power amplifier 13; in the second state, the switch 14 is connected to the second terminal 122 and the antenna 11, and the antenna 11 transmits the rf signal output from the second terminal 122. The signal transmission device 10 can realize long-distance and high-quality transmission in the first state and can make the power amplifier 13 not work in the second state, thereby reducing the power consumption of the signal output device 10, and moreover, no loop is formed between the power amplifier 13 and the switch 14, and the isolation degree of the switch 14 does not affect the working state of the power amplifier 13.
The antenna 11 may transmit radio frequency signals to the telecommunication device 200 and the antenna 11 may also receive radio frequency signals from the telecommunication device 200. The rf chip 12 is configured to convert a baseband signal into an rf signal and output the rf signal, and the rf chip 12 may include a plurality of output terminals, where the number of the output terminals is not limited herein, such as two, three, four, five, ten, and the like. The output terminal of the rf chip 12 of this embodiment at least includes a first terminal 121 and a second terminal 122, both the first terminal 121 and the second terminal 122 are capable of outputting rf signals, and the rf signals output by the first terminal 121 and the rf signals output by the second terminal 122 can be completely the same.
The power amplifier 13 is connected to the first terminal 121, and the power amplifier 13 is configured to process the radio frequency signal output by the first terminal 121. Specifically, the power amplifier 13 is capable of amplifying the radio frequency signal output from the first terminal 121. In one example, the power amplifier 13 can amplify the rf signal output from the first terminal 121 with a fixed gain. In another example, the power amplifier 13 can amplify the radio frequency signal output from the first terminal 121 with any one of a plurality of gains. It is understood that there are multiple gains in the power amplifier 13, and the power amplifier 13 can select one of the gains to amplify the rf signal output from the first terminal 121.
A switch 14 is connected to the antenna 11, the switch 14 being operable to select the radio frequency signal for transmission to the antenna 11. Specifically, one end of the switch 14 is connected to the antenna 11, and the other end of the switch 14 may be selectively connected to the second power amplifier 13 or the second terminal 122. The switch 14 is switchable between a first state and a second state. In a first state, the switch 14 is connected with the power amplifier 13 and the antenna 11, and the antenna 11 transmits the radio frequency signal processed by the power amplifier 13; in the second state, the switch 14 is connected to the second terminal 122 and the antenna 11, and the antenna 11 transmits the rf signal output from the second terminal 122. Further, the switch 14 is a component having a selection function, and the switch 14 may have a plurality of operating states and may be capable of switching between the plurality of operating states, for example, the switch 14 may be a single-pole double-throw switch, a single-pole triple-throw switch, a selector switch, or the like, without limitation, and the switch 14 may be capable of switching a connected interface to realize switching of the operating state. The switch 14 can be used to switch the working state, so as to reduce the volume and mass of the signal transmission device 10 and reduce the overall load of the unmanned aerial vehicle 100.
Referring to fig. 3, the signal transmission device 10 further includes a processing chip 15, wherein the processing chip 15 may be separately disposed in the signal transmission device 10 and only used for controlling the signal transmission device 10; the processing chip 15 may also be disposed in the drone 100, and not only can control the signal transmission device 10, but also can control other functional modules in the drone 100, which is not limited herein. The processing chip 15 is connected to the rf chip 12, and the processing chip 15 is configured to control the rf chip 12 to output an rf signal. The processing chip 15 is connected to the power amplifier 13, and the processing chip 15 is configured to control the power amplifier 13 to process the rf signal output by the rf chip 12.
Specifically, when the power amplifier 13 can amplify the radio frequency signal output from the first terminal 121 with any one of a plurality of gains, the processing chip 15 can control the gain of the power amplifier 13 in accordance with an external input. Wherein, external input includes the distance of unmanned aerial vehicle 100 and remote communication equipment 200, and remote communication equipment 200 passes through radio frequency signal communication with unmanned aerial vehicle 100. Further, a GPS is arranged in the unmanned aerial vehicle 100, a GPS is arranged in the remote communication device 200, the external input is the distance between the GPS in the unmanned aerial vehicle 100 and the GPS in the remote communication device 200, and when the distance is short, the processing chip 15 controls the power amplifier 13 to select a smaller gain to process the radio frequency signal output by the first terminal 121; when the distance is long, the processing chip 15 controls the power amplifier 13 to select a large gain to process the radio frequency signal output by the first terminal 121; when the distance is long, the processing chip 15 controls the power amplifier 13 to select a larger gain to process the radio frequency signal output by the first terminal 121. From this, power amplifier 13's gain and power can be adjusted by processing chip 15, can carry out the adaptability according to external input and adjust, can not be in the high power state always, and signal transmission device 10's consumption can be controlled, makes unmanned aerial vehicle 100 can the energy can be saved, improves duration.
The processing chip 15 is also connected to the switch 14, and the processing chip 15 is used for controlling the switch 14 to be kept in the first state or the second state. It is understood that the processing chip 15 can switch the operating state of the switch 14 to make the switch 14 in the first state or the second state. The switch 14 is in the first state, the switch 14 is connected to the power amplifier 13 and the antenna 11, the power amplifier 13 generates a large power consumption when operating, and the signal transmission apparatus 10 is in the high power consumption mode to meet the requirement of long-distance transmission. The switch 14 is in the second state, and the switch 14 connects the second terminal 122 and the antenna 11, and since the power amplifier 13 does not operate, the power consumption generated at this time is low. The processing chip 15 can control the state of the switch 14, so that the power amplifier 13 does not need to work all the time, and the power consumption of the signal transmission device 10 can be effectively reduced, thereby reducing the power consumption of the unmanned aerial vehicle 100 and prolonging the endurance time.
Referring to fig. 3, the signal transmission device 10 further includes a power supply 16, the power supply 16 is connected to the processing chip 15, the rf chip 12 and the power amplifier 13, and the power supply 16 provides power for the processing chip 15, the rf chip 12 and the power amplifier 13. The power supply 16 may be provided in the signal transmission device 10, and individually provide electric energy for each component of the signal transmission device 10, and the power supply 16 may also be provided in the unmanned aerial vehicle 100, so as to provide electric energy for each component of the signal transmission device 10, and provide electric energy for other components in the unmanned aerial vehicle 100, which is not limited herein. When the switch 14 is in the second state, the power supply 16 may not provide power to the power amplifier 13, thereby saving power consumption of the signal transmission device 10.
Referring to fig. 1, the unmanned aerial vehicle 100 further includes an imaging device 30, the imaging device 30 is mounted on the body 20, the imaging device 30 is connected to the signal transmission device 10, and the signal transmission device 10 is configured to transmit image information acquired by the imaging device 30. Specifically, the imaging device 30 may be directly mounted on the body 20, or the imaging device 30 may be mounted on the body 20 through the cradle head 40, which is not limited herein. In the embodiment shown in fig. 1, the imaging device 30 is mounted on the body 20 through a pan/tilt head 40. The imaging device 30 can acquire image information by taking a picture or taking a picture, the signal transmission device 10 is connected with the imaging device 30, the image information acquired by the imaging device 30 can be transmitted to the signal transmission device 10, and the signal transmission device 10 can transmit the image information acquired by the imaging device 30 to the remote communication equipment 200 for the remote communication equipment 200 to watch, edit or store and the like.
The unmanned aerial vehicle 100 further comprises a temperature sensor 50, the temperature sensor 50 is used for detecting the temperature of the body 20, the signal transmission device 10 is connected with the temperature sensor 50, and the control switch 14 is kept in the second state after the temperature sensor 50 detects that the temperature of the body 20 is greater than the temperature threshold for a predetermined time. Specifically, the temperature threshold may be a maximum temperature at which the drone 100 can operate for a long time, or the temperature threshold may be a temperature value set by the user autonomously. The predetermined time period may be a user-set or factory-set time period, such as 5 minutes, 10 minutes, 20 minutes, and the like. When the temperature of the body 20 is greater than the temperature threshold for a predetermined time, the operating state of the drone 100 is easily affected, even stopped. If the temperature sensor 50 detects that the temperature of the airframe 20 is greater than the temperature threshold for a predetermined time, the switch 14 is kept in the first state, the power amplifier 13 will work to generate a higher temperature, so that the temperature of the airframe 20 continues to rise, and the operating state of the unmanned aerial vehicle 100 is easily abnormal. If the temperature of the unmanned aerial vehicle 100 is greater than the temperature threshold value for a predetermined time, the control switch 14 of the signal transmission device 10 is in the second state, the power consumption generated by the signal transmission device 10 is low, and therefore the temperature generated by the signal transmission device 10 is low, the temperature of the unmanned aerial vehicle 20 can be prevented from being continuously increased, and the unmanned aerial vehicle 100 can be kept in a good working state. The temperature sensor 50 is arranged to detect the temperature of the body 20 in real time, so as to better monitor the operation state of the unmanned aerial vehicle 100.
Referring to fig. 1 and 3, the signal transmission device 10 is capable of responding to a first command to keep the switch 14 in the first state, where the first command may be in response to receiving a user command to enter the high power mode and the temperature of the body 20 is less than the temperature threshold; or, any event of the events that the distance between the remote communication device 200 and the drone 100 is greater than the distance threshold value, etc. is generated.
The signal transmission device 10 is responsive to a second instruction to maintain the switch 14 in the second state, wherein the second instruction is responsive to receiving a user instruction to enter the low power mode; or, the temperature of the signal transmission device 10 is greater than the temperature threshold for a predetermined time; or, the distance between the remote communication device 200 and the drone 100 is smaller than a distance threshold.
Specifically, when the user performs a first predetermined operation on the button or the touch screen 210 on the remote communication device 200, which may be considered as receiving a user instruction to enter the high power mode, the remote communication device 200 sends the user instruction to enter the high power mode to the drone 100, for example, a pop-up window on a UI interface of the remote communication device 200 such as a remote controller or a mobile phone asks the user whether to enter the high power mode, and if the user selects yes on the touch screen 210, the remote communication device 200 sends the user instruction to enter the high power mode to the drone 100. After receiving a user instruction for entering a high-power mode sent by the remote communication device 200, the unmanned aerial vehicle 100 sends the temperature of the body 20 detected by the temperature sensor 50 to the processing chip 15 of the signal transmission device 10, the processing chip 15 determines the temperature of the body 20, if the temperature of the body 20 is less than a temperature threshold, a first instruction is generated, the processing chip 15 controls the switch 14 to keep a first state, and the signal transmission device 10 enters the high-power mode to operate. If the temperature of body 20 is greater than the temperature threshold, the first instruction is not generated.
When the user performs a second predetermined operation on the key or the touch screen 210 on the remote communication device 200, it may be considered that a user instruction for entering the low power mode is received, the remote communication device 200 sends the user instruction for entering the low power mode to the drone 100, and the drone 100 receives the instruction for entering the low power mode, generates a second instruction, and sends the second instruction to the signal transmission device 10. For example, the user asks whether the user enters the high power mode or not through a pop-up window on the UI interface on the remote communication device 200 such as a remote controller or a mobile phone, and if the user selects no on the touch screen 210, the remote communication device 200 sends an instruction to enter the low power mode to the drone 100, and the drone 100 generates a second instruction and sends the second instruction to the signal transmission device 10. The signal transmission device 10 maintains the switch 14 in the second state in response to the second instruction, and the switch 14 connects the second terminal 122 and the antenna 11.
After the temperature of the body 20 is greater than the temperature threshold for a predetermined time, in order to avoid the damage to the signal transmission device 10 and even the unmanned aerial vehicle 100 caused by the continuous rise of the temperature of the unmanned aerial vehicle 100, the unmanned aerial vehicle 100 generates the second instruction, and the signal transmission device 10 responds to the second instruction to keep the switch 14 in the second state, so that the temperature of the body 20 is reduced, and the normal operation of the signal transmission device 10 and the unmanned aerial vehicle 100 is ensured.
Further, the distance between the remote communication device 200 and the drone 100 changes at any time, and if the distance between the remote communication device 200 and the drone 100 is greater than a set distance threshold, the drone 100 automatically generates the first command. It can be understood that, when the distance between the unmanned aerial vehicle 100 and the remote communication device 200 is long, the signal transmission between the unmanned aerial vehicle 100 and the remote communication device 200 is unstable and is easily interfered, in order to enable the unmanned aerial vehicle 100 to better transmit signals and transmit high-definition image information to the remote communication device 200, the power amplifier 13 is required to amplify radio frequency signals, so as to generate a first instruction, the signal transmission device 10 responds to the first instruction to keep the switch 14 in the first state, the switch 14 is connected with the power amplifier 13 and the antenna 11, the power amplifier 13 is connected with the first terminal 121, the power amplifier 13 amplifies the radio frequency signals output by the radio frequency chip 12, and the radio frequency signals are transmitted to the remote communication device 200 after being processed by the power amplifier 13 and then transmitted to the antenna 11.
The distance between the remote communication device 200 and the drone 100 is less than a set distance threshold, and when the distance between the remote communication device 200 and the drone 100 is close, the signal transmission between the drone 100 and the remote communication device 200 is stable and not easily interfered, the signal transmission device 10 can realize stable transmission of signals only by keeping the low power consumption mode, if the signal transmission device 10 maintains the high power mode, a large power consumption will be generated, so the unmanned aerial vehicle 100 generates a second instruction, the signal transmission device 10 responds to the second instruction to keep the switch 14 in the second state, the switch 14 is connected to the second terminal 122 and the antenna 11, the radio frequency signal is directly transmitted to the antenna 11 by the radio frequency chip 12 and then is sent to the remote communication device 200, at this time, the power amplifier 13 does not work, the power consumption generated by the signal transmission device 10 is small, and the power consumption of the signal transmission device 10 in a short distance can be effectively reduced.
Two approaches to solving the problem of excessive near-field transmit power are common: one is Transmit Power Control (TPC): according to the distance come dynamic adjustment transmitting power, closely reduce transmitting power, remote increase transmitting power, this technique realizes that the complexity is higher, realizes the degree of difficulty great in unmanned aerial vehicle picture passes the module, even if power amplifier does not output, is in static operating point, and the consumption is still very big moreover, and near field consumption descends limitedly. Another approach is to add a switch on the transmit chain to bypass the power amplifier: the power amplifier is closed in a short distance, a transmitting link is formed by the switches, the power amplifier is opened in a long distance, the switches are in an isolation state, the size of the signal transmission device is increased due to the fact that at least two switches are added, and the power amplifier cannot normally work due to the fact that the switches and the power amplifier form a loop circuit if the isolation degree of the switches is poor when the power amplifier is opened and positive feedback is caused to cause the power amplifier to self-excite.
In summary, compared to the method using the transmission power control technology, in the signal transmission device 10 according to the embodiment of the present invention, during short-distance transmission, the antenna 11 directly transmits the radio frequency signal output from the second terminal 122, the power amplifier 13 does not operate, and the power amplifier 13 does not generate power consumption, so that the power consumption of the signal transmission device 10 can be reduced. Compared with another method for adding a switch to bypass the power amplifier on a transmission link, the signal transmission device 10 according to the embodiment of the present invention has the advantages that only one switch 14 is provided, the size of the signal transmission device 10 is smaller, the switch 14 and the power amplifier 13 do not form a loop, the power amplifier 13 does not cause positive feedback due to poor isolation of the switch 14, and the power amplifier 13 does not self-excite.
In the description herein, reference to the description of the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating 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 at least one of the feature. In the description of the present application, "a plurality" means at least two, e.g., two, three, unless specifically limited otherwise.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art within the scope of the present application, which is defined by the claims and their equivalents.
Claims (10)
1. A signal transmission device for an unmanned aerial vehicle, the signal transmission device comprising:
an antenna for transmitting or receiving radio frequency signals;
the radio frequency chip comprises a first terminal and a second terminal, and the first terminal and the second terminal can output radio frequency signals;
the power amplifier is connected with the first terminal and is used for processing a radio frequency signal output by the first terminal; and
a switch connected to the antenna, the switch being switchable between a first state and a second state; in the first state, the switch is connected with the power amplifier and the antenna, and the antenna transmits the radio-frequency signal processed by the power amplifier; in the second state, the switch is connected with the second terminal and the antenna, and the antenna transmits the radio-frequency signal output by the second terminal.
2. The signal transmission device according to claim 1, further comprising a processing chip, wherein the processing chip is connected to the rf chip, and the processing chip is configured to control the rf chip to output an rf signal;
the processing chip is connected with the power amplifier and is used for controlling the power amplifier to process the radio-frequency signal;
the processing chip is connected with the switch, and the processing chip is used for controlling the switch to be kept in the first state or the second state.
3. The signal transmission apparatus according to claim 2, wherein the power amplifier is capable of amplifying the rf signal output from the first terminal with any one of a plurality of gains, the processing chip is configured to control the gain of the power amplifier according to an external input, the external input includes a distance between the drone and a remote communication device, and the remote communication device is in communication connection with the drone through the rf signal.
4. The signal transmission device according to claim 2, further comprising a power supply, wherein the power supply is connected to the processing chip, the rf chip and the power amplifier, and the power supply provides power to the processing chip, the rf chip and the power amplifier.
5. An unmanned aerial vehicle, comprising:
a body; and
the signal transmission device according to any one of claims 1 to 4, which is mounted on the body.
6. The unmanned aerial vehicle of claim 5, further comprising an imaging device, wherein the imaging device is mounted on the body, and the imaging device is connected with the signal transmission device, and the signal transmission device is used for transmitting image information acquired by the imaging device.
7. A drone according to claim 5 or 6, further comprising a temperature sensor for detecting the temperature of the body;
the signal transmission device is connected with the temperature sensor;
and the signal transmission device controls the switch to be kept in the second state after the temperature sensor detects that the temperature of the machine body is greater than the temperature threshold for a preset time.
8. An unmanned aerial vehicle system, comprising:
the drone of any one of claims 5 to 7; and
and the remote communication equipment is in communication connection with the signal transmission device.
9. The drone system of claim 8, wherein the signal transmission device is responsive to a first instruction to maintain the switch in the first state, the first instruction generated in response to any of:
receiving a user instruction for entering a high-power mode, wherein the temperature of the machine body is less than a temperature threshold value;
the distance between the remote communication equipment and the unmanned aerial vehicle is greater than a distance threshold value.
10. The drone system of claim 8, wherein the signal transmission device is responsive to a second instruction to maintain the switch in the second state, the second instruction generated in response to any of:
receiving a user instruction to enter a low power mode; or
The temperature of the machine body is greater than a temperature threshold value for a preset time; or
The distance between the remote communication equipment and the unmanned aerial vehicle is smaller than a distance threshold value.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111935811A (en) * | 2020-06-28 | 2020-11-13 | 北京遥测技术研究所 | Airborne swarm terminal adaptive power control method based on temperature sensor |
| WO2022193092A1 (en) * | 2021-03-15 | 2022-09-22 | 深圳市大疆创新科技有限公司 | Signal transmission apparatus, movable platform, control method, system, and storage medium |
| WO2023169494A1 (en) * | 2022-03-09 | 2023-09-14 | 维沃移动通信有限公司 | Antenna power adjustment method and apparatus, electronic device and readable storage medium |
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2019
- 2019-12-20 CN CN201922328379.XU patent/CN210724786U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111935811A (en) * | 2020-06-28 | 2020-11-13 | 北京遥测技术研究所 | Airborne swarm terminal adaptive power control method based on temperature sensor |
| WO2022193092A1 (en) * | 2021-03-15 | 2022-09-22 | 深圳市大疆创新科技有限公司 | Signal transmission apparatus, movable platform, control method, system, and storage medium |
| WO2023169494A1 (en) * | 2022-03-09 | 2023-09-14 | 维沃移动通信有限公司 | Antenna power adjustment method and apparatus, electronic device and readable storage medium |
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