WO2020062066A1 - Procédé d'estimation, dispositif de surveillance et support de stockage lisible par ordinateur - Google Patents

Procédé d'estimation, dispositif de surveillance et support de stockage lisible par ordinateur Download PDF

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Publication number
WO2020062066A1
WO2020062066A1 PCT/CN2018/108431 CN2018108431W WO2020062066A1 WO 2020062066 A1 WO2020062066 A1 WO 2020062066A1 CN 2018108431 W CN2018108431 W CN 2018108431W WO 2020062066 A1 WO2020062066 A1 WO 2020062066A1
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WIPO (PCT)
Prior art keywords
signal
strength
monitoring device
drone
indication information
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PCT/CN2018/108431
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English (en)
Chinese (zh)
Inventor
杨普昌
邓任钦
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深圳市大疆创新科技有限公司
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Priority to CN201880037336.1A priority Critical patent/CN110771064A/zh
Priority to PCT/CN2018/108431 priority patent/WO2020062066A1/fr
Publication of WO2020062066A1 publication Critical patent/WO2020062066A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18502—Airborne stations
    • H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/42—Simultaneous measurement of distance and other co-ordinates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems

Definitions

  • the invention relates to the technical field of unmanned aerial vehicles, in particular to an estimation method, a monitoring device and a computer-readable storage medium.
  • Drones are drones that are controlled by radio remote control equipment and program control devices. Drones can be used because they have the advantage that they do not need to be piloted in person. For difficult or dangerous tasks, such as aerial photography, agriculture, plant protection, micro-self-timer, express delivery, disaster rescue, wildlife observation, surveillance of infectious diseases, mapping, news reporting, power inspection, disaster relief, filming and special effects And other fields. Although drones shine in many areas, problems follow, such as when drones enter no-fly zones such as airports, causing serious security accidents.
  • monitoring equipment can be used to monitor the drone's flight in a certain area, to obtain the status information of the drone, found in the actual drone monitoring application,
  • the security management user needs to determine the monitoring range of the monitoring device in the current environment. Therefore, how to better evaluate the monitoring range of the monitoring device has become a hot issue for research.
  • Embodiments of the present application provide an estimation method, a monitoring device, and a computer-readable storage medium, which can accurately evaluate the signal strength of a wireless signal received by the monitoring device to evaluate the size of the monitoring range of the monitoring device.
  • an embodiment of the present application provides an estimation method, which includes:
  • the analysis signal is obtained by processing a wireless signal received by an antenna device of the monitoring device by a signal processing circuit of the monitoring device;
  • the signal strength of the wireless signal received by the antenna device is estimated according to the strength indication information of the parsed signal, where the signal strength of the wireless signal is used to evaluate a monitoring range of the drone by the monitoring device.
  • another embodiment of the present application provides a monitoring device, where the monitoring device includes:
  • a first acquisition unit configured to acquire an analysis signal, where the analysis signal is obtained by processing a wireless signal received by an antenna device of the monitoring device by a signal processing circuit of the monitoring device;
  • a determining unit configured to determine strength indication information of the parsed signal
  • An estimation unit configured to estimate a signal strength of a wireless signal received by the antenna device according to the strength indication information of the parsed signal, wherein the signal strength of the wireless signal is used to evaluate the monitoring device's response to the drone The monitoring range.
  • the monitoring device includes an antenna device, a signal processing circuit, and a parsing device.
  • the antenna device is configured to receive wireless signals from the environment; the signal processing circuit, Configured to perform signal processing on a wireless signal received by the antenna device to obtain a parsed signal; the parsed device is configured to obtain the parsed signal; determine strength indication information of the parsed signal;
  • the strength instruction information estimates a signal strength of a wireless signal received by the antenna device, wherein the signal strength of the wireless signal is used to evaluate a monitoring range of the drone by the monitoring device.
  • an embodiment of the present application provides a computer-readable storage medium, wherein the computer storage medium stores a computer program, where the computer program includes program instructions, and the program instructions are executed by a processor, To perform the method of the first aspect.
  • the embodiment of the present application evaluates the signal strength of the wireless signal by determining the signal strength indication information of the wireless signal received by the monitoring device, so that the user can know the signal received by the monitoring device according to the signal strength of the wireless signal received by the monitoring device.
  • the intensity of the interference thereby knowing that the monitoring device can monitor the monitoring range of the drone.
  • FIG. 1 is an application scenario diagram of an evaluation method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of an estimation method according to an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of an estimation method according to another embodiment of the present application.
  • FIG. 4 is an exemplary diagram of signal strengths of a wireless signal at multiple frequency points provided by an embodiment of the present application
  • FIG. 5 is a structural block diagram of a monitoring device according to an embodiment of the present application.
  • 6A is a schematic block diagram of a monitoring device according to an embodiment of the present application.
  • 6B is a schematic block diagram of another monitoring device according to an embodiment of the present application.
  • FIG. 6C is a schematic block diagram of another monitoring device according to an embodiment of the present application.
  • the embodiment of the present application provides a method for estimating a monitoring device applied to an unmanned aerial vehicle.
  • the unmanned aerial vehicle is called an Unmanned Aerial Vehicle / Drones (UAV).
  • UAV Unmanned Aerial Vehicle / Drones
  • the unmanned aerial vehicle may be a four-axis aircraft. , Six-axis aircraft, etc .; the monitoring device is used to scan the drone in the environment. Specifically, the monitoring device can scan the wireless data link between the drone and the control device of the drone to control the drone. Human machine, obtaining information sent by drone, or monitoring status information of drone, etc., where status information includes identification information, position information, and / or flight status parameters of drone, etc.
  • monitoring The device is also used for environmental frequency scanning, which is used to obtain the wireless signal in the environment and detect the signal strength of the wireless signal to evaluate the monitoring range that the monitoring device can monitor the drone.
  • the monitoring device includes an antenna device, a signal processing circuit, and an analysis device.
  • the antenna device is used to acquire or send a wireless signal.
  • the signal processing circuit is used to process the wireless signal ( (E.g., amplification, filtering, A / D conversion, etc.), the analysis device can analyze the processed wireless signal, so as to obtain the strength indication information (RSSI, Received Signal Strength Indication) of the wireless signal, and then according to the strength of the wireless signal
  • the instruction information is used to obtain the signal strength of the wireless signal.
  • the signal strength of the wireless signal represents the actual value of the interference strength of the monitoring device by the wireless signal. Therefore, the user can know that the monitoring device can monitor no one by the strength of the interference received by the monitoring device. Machine's monitoring range.
  • the analysis device may be composed of one or more processors.
  • the above-mentioned obtaining the signal strength of the wireless signal according to the strength indication information of the wireless signal refers to obtaining a preset mapping table between the above-mentioned strength indication information and the signal strength, and then according to the preset mapping table, Obtain the signal strength corresponding to the strength indication information as the signal strength of the wireless signal; or obtain the signal strength corresponding to the strength indication information as the reference signal strength, and then obtain the actual configuration parameters of the monitoring device to the reference signal strength.
  • the calibration is performed to obtain the signal strength of the wireless signal, wherein the reference signal strength represents an estimated value of the interference level of the monitoring device by the wireless signal, and the actual configuration parameter is the actual gain of the wireless signal after passing through the signal processing circuit.
  • a service scenario in which a monitoring device performs an environment frequency sweep includes a monitoring device and at least one interference source. Among them, the monitoring device is used to implement the function of environmental frequency sweeping.
  • the interference source can send signals.
  • the signal from the interference source can affect the monitoring range of the monitoring device to the drone.
  • the interference source can be any kind of device that can send signals. Mobile phones and / or base stations, etc.
  • the monitoring device monitors wireless signals in the environment.
  • the wireless signals include signals from some interference sources and may also include signals from the drone.
  • the signal processing circuit in the monitoring device is used to process the wireless signal received by the antenna device.
  • the analysis device can analyze the processed wireless signal to obtain the strength indication information. And then obtain the signal strength of the wireless signal according to the strength indication information.
  • the signal strength corresponding to the instruction information and use the signal strength corresponding to the strength instruction information as the signal strength of the wireless signal, or use the signal strength corresponding to the strength instruction information as the reference signal strength, and then correct the reference signal strength Signal strength as the wireless signal.
  • the calibration process includes: the monitoring device obtains the serial number of its own signal processing circuit, and then obtains the actual configuration parameters of the signal processing circuit corresponding to the serial number from the server according to the serial number, and then, Calibrate with reference to signal strength.
  • a service scenario in which the monitoring device performs an environment frequency sweep as shown in FIG. 1 may further include a control device and the like.
  • the control device is used to control the drone.
  • the user can control the drone by manipulating the control device.
  • the control device may be a smart phone, a laptop computer, a tablet computer, a remote control or a wearable device (watch, bracelet), etc. or a combination thereof.
  • a wireless data link is used for data interaction between the control device and the drone.
  • the wireless data link is divided into an uplink data link and a downlink data link.
  • the uplink data link is used to transmit data sent by the control device to the drone
  • the downlink data link is used to transmit data sent by the drone to the control device.
  • the monitoring device further includes a communication interface for performing data interaction with other terminal devices and / or servers. Specifically, the monitoring device can transmit data to the remote monitoring device in a wired or wireless manner (fourth-generation mobile communication technology 4G, fifth-generation mobile communication technology 5G, low-frequency private network or Ethernet) through the communication interface, and the remote monitoring device can The acquired data is displayed on the interactive interface.
  • a communication interface for performing data interaction with other terminal devices and / or servers.
  • the monitoring device can transmit data to the remote monitoring device in a wired or wireless manner (fourth-generation mobile communication technology 4G, fifth-generation mobile communication technology 5G, low-frequency private network or Ethernet) through the communication interface, and the remote monitoring device can The acquired data is displayed on the interactive interface.
  • the remote control device is acquiring status information (such as the identification information of the drone, Position information and / or information such as flight status parameters, etc.), the status information or a part of the status information (for example, identification information of the drone) may be sent to the server.
  • the server will query the additional information of the drone according to the received status information or a part of the status information, and send the additional information of the drone to the remote monitoring device.
  • the remote monitoring device can display the additional information of the drone on the remote On the interactive interface of the monitoring device.
  • the monitoring device supports multiple power supply modes of city power and battery, and supports multiple installation methods such as pole-mounted, wall-mounted or ground-mounted installation.
  • the present application performs environmental frequency scanning by the monitoring device itself, so that the obtained results are more accurate than the environmental frequency scanning performed by the third-party device, and without increasing the hardware cost, the original monitoring device Realized more functions on the hardware, realized the multi-functional multiplexing of the monitoring equipment, that is, the monitoring of the drone and the evaluation of the monitoring range.
  • an embodiment of the present invention proposes a more detailed evaluation method in FIG. 2, and the evaluation method may be performed by the foregoing monitoring device.
  • the antenna device, signal processing circuit, and analysis device included in the monitoring device shown in Figure 5 are connected in order.
  • the monitoring device obtains the wireless signal in the environment through the antenna device, and then amplifies, filters, and filters the wireless signal through the signal processing circuit. / D conversion and other processes to obtain an analytical signal, and finally the analyzing device analyzes the analytical signal to obtain signal strength indication information of the analytical signal, and estimates the signal strength of the wireless signal from the signal strength indication information.
  • the signal strength of the wireless signal is the strength of signal interference in the current environment, and its size reflects the monitoring range that the monitoring device can monitor the drone.
  • the greater the signal strength of the wireless signal in the environment the greater the interference to the monitoring device, and the smaller the monitoring range of the monitoring device to monitor the drone.
  • the smaller the wireless signal in the environment the smaller the monitoring device is.
  • the smaller the interference the larger the monitoring range of the monitoring device monitoring the drone.
  • the monitoring device acquires a wireless signal in the environment through an antenna device, and then inputs the wireless signal to a signal processing circuit to process the wireless signal to obtain a parsed signal of the wireless signal.
  • the processing of the wireless signal may include one or more of amplification, filtering, shaping, and A / D conversion to obtain an analytical signal.
  • the signal processing circuit includes a power amplifier, a filter, a low noise amplifier, an A / D converter, and the like.
  • the wireless signal further includes a presence signal sent by the drone, and the presence signal includes status information of the drone, wherein the status information of the drone includes identification information and location of the drone Information and / or flight status parameters.
  • the identification information of the drone is any combination of information that can uniquely confirm the identity of the drone, such as characters and / or data, and the position information is used to describe the position where the drone is located, such as coordinates.
  • the flight status parameters describe The flight status of the drone, such as the flying height of the drone and / or the flying speed information of the drone.
  • the presence signal of the drone in the above wireless signal is analyzed to obtain the presence signal. Status information for your drone.
  • the monitoring link of the drone monitoring device can be multiplexed.
  • the monitoring link can be used for both drone monitoring and frequency sweep testing in a space wireless environment. Therefore, in the embodiment of the present application, the monitoring of the drone and the environment frequency sweeping are simultaneously implemented without adding a hardware device of the monitoring device.
  • the analyzing device obtains intensity indication information corresponding to each of the multiple frequencies of the analytical signal, and the multiple frequency points include Multiple frequency points in the 2.4GHz band and 5.8GHZ band respectively.
  • the strength indication information (RSSI, Received Signal Strength Indication) of the analysis signal is directly read in the processing chip of the monitoring device.
  • the environmental frequency sweep function of the monitoring device can be turned on or off. Only when the signal strength evaluation function corresponding to the frequency sweep function of the monitoring device is on, the above S202 is performed to obtain the strength indication information of the parsed signal. A step of. Specifically, the analysis device acquires the signal strength evaluation function status before acquiring the strength indication information of the analysis signal, and obtains the strength indication information of the analysis signal when the status of the signal strength evaluation function is on.
  • the above-mentioned environmental frequency sweeping function can be manually turned on or off, thereby saving the power consumption of the monitoring equipment and improving the efficiency of the environmental frequency sweeping.
  • the user generally only searches for If the signal from the human machine or the signal from the drone is weak, perform an environmental frequency scan to detect whether the monitoring range of the monitoring device is reduced due to excessive external interference signals, and then the user can scan according to the environment.
  • adjust the communication frequency of the monitoring equipment or transfer the monitoring machine to an area with less interference from external signals, or shield nearby interference sources.
  • the signal processing circuit is used to process the wireless signal to obtain an analytical signal, and the analyzing device obtains the analytical signal at Strength indication information corresponding to each frequency point in the multiple frequency points.
  • the signal strength of the wireless signal is obtained according to the strength indication information of the wireless signal obtained in S202. Specifically, obtain the strength indication information of the analysis signal obtained in S202, and obtain a preset mapping table containing the strength indication information and the signal strength, and then directly query the strength indication information corresponding to the analysis information in the preset mapping table.
  • the signal strength is used as the signal strength of the wireless signal, or the signal strength corresponding to the strength indication information of the analysis information is used as the reference signal strength, and the reference signal strength is calibrated to obtain the signal strength of the wireless signal.
  • the signal strength indicates the actual value of the interference strength of the monitoring device by the wireless signal
  • the reference signal strength indicates the estimated value of the interference level of the monitoring device by the wireless signal.
  • the process of calibrating the reference signal strength to obtain the signal strength of the wireless signal refers to obtaining the reference configuration parameters and actual configuration parameters of the signal processing circuit, and then calculating the difference between the reference configuration parameters and the actual configuration parameters. The difference is used to calibrate the reference information intensity to obtain the post-signal strength of the wireless signal.
  • the reference configuration parameter refers to the default gain of the wireless signal after passing through the signal processing circuit.
  • the actual configuration parameter is that the wireless signal undergoes signal processing. The actual gain after the circuit. Specifically, there is a functional relationship between the reference configuration parameters, the actual configuration parameters, and the reference signal strength.
  • Pn Prs- (SX), where Pn, Prs, S, and X are the signal strength, reference signal strength, actual Configuration parameters and reference configuration parameters.
  • the above-mentioned signal processing circuit is integrated with a low-noise amplifier, wherein the low-noise amplifier is used to amplify weak signals. It can be seen that the low-noise amplifier integrated in the signal processing circuit will increase the noise of the signal. Correspondingly, the above reference configuration parameters and actual configuration parameters are actually the reference gain and actual gain of the low-noise amplifier in the signal processing circuit, respectively.
  • the monitoring device further includes a communication interface for performing data interaction with other terminal devices and / or servers.
  • the actual reference configuration parameters are stored in the server, so when the parsing device of the monitoring device obtains the actual reference configuration parameters, the monitoring device sends a request message to the server according to the serial number of the signal processing circuit through the communication interface to obtain the signal.
  • the actual configuration parameters of the processing circuit are stored in the server, so when the parsing device of the monitoring device obtains the actual reference configuration parameters, the monitoring device sends a request message to the server according to the serial number of the signal processing circuit through the communication interface to obtain the signal.
  • the actual configuration parameters of the processing circuit are stored in the server, so when the parsing device of the monitoring device obtains the actual reference configuration parameters, the monitoring device sends a request message to the server according to the serial number of the signal processing circuit through the communication interface to obtain the signal.
  • the actual configuration parameters of the processing circuit are stored in the server, so when the parsing device of the monitoring device obtains the actual reference configuration parameters, the
  • the entire monitoring device consists of two parts, the antenna part and the terminal part, the antenna part is the antenna device, and the terminal part contains the above-mentioned signal processing circuit and analysis device. These two parts are generated separately during production , And is integrated into two package modules, the two parts are randomly combined during project installation. Due to different individual differences, the actual gain of different signal processing circuits is different, and after the whole machine is assembled, it cannot be calibrated individually. Therefore, in this application, before the whole machine is assembled, the actual gain of each signal processing circuit is tested to obtain the actual configuration parameters of each signal processing circuit, and then each signal processing circuit is uniquely labeled. Information, and finally associate the identification information with the actual configuration parameters to obtain the correspondence between the identification information of the signal processing circuit and the actual configuration parameters, and upload it to the server through the communication interface.
  • the above-mentioned preset mapping table is obtained after performing calibration on a plurality of monitoring device samples, so the preset mapping tables of all monitoring devices are consistent. Specifically, a signal with a known signal strength is connected to the antenna device of the monitoring device, and the signal strength indication information obtained by the analysis device is read at the same time. After multiple experiments, the signal strength and the signal strength indication information can be established.
  • the corresponding relationship table is the preset mapping relationship.
  • the above reference configuration parameters are obtained by measuring a plurality of signal processing circuit samples. Therefore, the reference configuration parameters are the same for all signal processing circuits and are default values.
  • the above-mentioned actual configuration parameters are obtained by individually measuring each signal processing circuit during the production of the single board, so each signal processing circuit corresponds to a separate actual configuration parameter, and each signal processing circuit is labeled. After associating the label of each signal processing circuit with the actual configuration parameter corresponding to the signal processing circuit, it is stored in the server, and when necessary, the corresponding actual configuration parameter is obtained according to the number of the signal processing circuit.
  • the signal strength of the wireless signal indicates the actual value of the interference strength of the monitoring device from the wireless signal.
  • the user can know that the monitoring device can monitor Human-machine monitoring range, and by applying different signal processing circuits and obtaining actual configuration parameters of the signal processing circuit, this application can perform more accurate calibration for each monitoring device, further improving the signal strength of the wireless signal. Accuracy, that is, the accuracy of evaluating the monitoring range of the monitoring device is improved.
  • the analyzing device obtains intensity indication information corresponding to each of the multiple frequencies of the analytical signal, and then according to the multiple The strength indication information corresponding to each of the frequency points is used to determine the signal strength of the wireless signal of the environment received by the antenna device at each of the plurality of frequency points.
  • the amplitude maps of the signal strengths at different frequency points are displayed. For example, to obtain the four frequencies of the wireless signal in the 2.4G band, 2.1GHZ, 2.2GHZ, 2.3GHZ, and 2.4GHZ, and four frequency points in the 5.8G band at 5.5GHZ, 5.6GHZ, 5.7GHZ, and 5.8GHZ
  • the signal strength is plotted as shown in Figure 4, with the abscissa being the frequency and the ordinate being the signal strength.
  • the signal strength of the wireless signal at the frequency of 5.5GHZ is 0, so it can be regarded as the least interference to the monitoring device, so the monitoring device can best monitor the drone at the frequency of 5.5GHZ. , The widest range of monitoring.
  • the user can know at which frequency point the external wireless signal has the least interference with the monitoring device, and according to the amplitude maps of the signal strength at different frequency points, To manually or automatically adjust the communication frequency of the monitoring device (such as the frequency of receiving wireless signals).
  • the signal strengths of the wireless signals obtained above, or the amplitude maps of the signal strengths of the wireless signals at different frequency points are wired or wireless (4G mobile communication technology, 5G mobile communication).
  • 4G mobile communication technology 5G mobile communication
  • 5G mobile communication 5G mobile communication
  • Technology 5G, low-frequency private network or Ethernet to the remote monitoring device, and the remote monitoring device can place the monitoring information on the interactive interface.
  • This application evaluates the signal strength of the wireless signal by determining the signal strength indication information of the wireless signal received by the monitoring device, so that the user can know the signal interference received by the monitoring device based on the signal strength of the wireless signal received by the monitoring device. Strength to know that the monitoring device can monitor the monitoring range of the drone. Therefore, the present application directly scans the environment by using the monitoring device itself. Compared with third-party frequency scanning, it can more accurately evaluate the intensity of interference received by the monitoring device, and thus better reflect the monitoring range of the monitoring device.
  • an embodiment of the present invention further proposes an estimation method in FIG. 3 that can better estimate a monitoring range of a monitoring device, and the estimation method may be performed by the foregoing monitoring device of a drone.
  • the monitoring device acquires a wireless signal in the environment through an antenna device, and then inputs the wireless signal to a signal processing circuit to process the wireless signal to obtain an analytical signal of the wireless signal.
  • the processing of the wireless signal may include one or more of amplification, filtering, shaping, and A / D conversion to obtain an analytical signal.
  • the signal processing circuit includes a power amplifier, a filter, a low noise amplifier, an A / D converter, and the like.
  • the presence signal of the drone in the wireless signal is analyzed to obtain the status information of the drone in the presence signal.
  • Status information includes information such as identification information, location information, and / or flight status parameters of the drone.
  • the identification information of the drone is any combination of information that can uniquely confirm the identity of the drone, such as characters and / or data
  • the position information is used to describe the position where the drone is located, such as coordinates.
  • the flight status parameters describe The flight status of the drone, such as the flying height of the drone and / or the flying speed information of the drone.
  • the monitoring link of the drone monitoring device can be multiplexed.
  • the monitoring link can be used for both drone monitoring and frequency sweep testing in a space wireless environment. Therefore, in the embodiment of the present application, the monitoring of the drone and the environment frequency sweeping are simultaneously implemented without adding a hardware device of the monitoring device.
  • the state of the signal strength assessment function is acquired.
  • the state of the signal strength assessment function is on, it means that the environmental frequency scanning function of the monitoring device is turned on.
  • the state of the signal strength assessment function is off, the environment scan of the monitoring device is explained. The frequency function is turned off.
  • the above-mentioned environmental frequency sweeping function can be manually turned on or off, thereby saving the power consumption of the monitoring equipment and improving the efficiency of the environmental frequency sweeping.
  • the user generally only searches for If the signal from the human machine or the signal from the drone is weak, perform an environmental frequency scan to detect whether the monitoring range of the monitoring device is reduced due to excessive external interference signals, and then the user can scan according to the environment.
  • adjust the communication frequency of the monitoring equipment or transfer the monitoring machine to an area with less interference from external signals, or shield nearby interference sources.
  • the analysis device obtains the analysis signal corresponding to each of a plurality of frequency points.
  • Strength indication information When the state of the above-mentioned signal strength evaluation function is on, the analysis device of the monitoring device may obtain the strength indication information of the analysis information at each of a plurality of frequency points.
  • the signal strength of the wireless signal is obtained according to the strength indication information of each of the plurality of frequency points of the analytical signal obtained in S304. Specifically, the intensity indication information of each analysis point obtained in S304 is obtained, and a preset mapping table containing the correspondence between the intensity indication information and the signal strength is obtained, and then the above-mentioned in the preset mapping table is directly queried. Analyze the signal strength corresponding to the strength indication information of the signal at each frequency point as the signal strength of the wireless signal at each of the frequency points, or use the signal strength corresponding to the strength indication information of the wireless signal at each frequency point.
  • the reference signal strength of the wireless signal at each frequency point is calibrated to obtain the signal strength of the wireless signal at each frequency point, where the signal strength of the wireless signal at each frequency point is expressed
  • the actual value of the interference strength of the wireless signal received by the monitoring device at this frequency point, and the reference signal strength of the wireless signal at each frequency point represents the estimate of the interference level of the wireless signal received by the monitoring device at that frequency point value.
  • the above-mentioned signal processing circuit needs to be individually calibrated, and the above-mentioned preset mapping table is generated when the whole monitoring device is calibrated. Specifically, a wireless signal with a known signal strength is connected to the antenna device of the monitoring device, and the signal strength indication information of the analysis device is read at the same time. After multiple experiments, the signal strength and signal strength indication information can be established. Correspondence table, that is, a preset mapping relationship.
  • the process of calibrating the reference signal strength to obtain the signal strength of the wireless signal refers to obtaining the reference configuration parameters and actual configuration parameters of the signal processing circuit, and then calculating the difference between the reference configuration parameters and the actual configuration parameters. The difference is used to calibrate the reference information intensity to obtain the post-signal strength of the wireless signal.
  • the reference configuration parameter refers to the default gain of the wireless signal after passing through the signal processing circuit.
  • the actual configuration parameter is that the wireless signal undergoes signal processing. The actual gain after the circuit. Specifically, there is a functional relationship between the reference configuration parameters, the actual configuration parameters, and the reference signal strength.
  • Pn Prs- (SX), where Pn, Prs, S, and X are the signal strength, reference signal strength, actual Configuration parameters and reference configuration parameters.
  • the above-mentioned signal processing circuit is integrated with a low-noise amplifier, wherein the low-noise amplifier is used to amplify weak signals. It can be seen that the low-noise amplifier integrated in the signal processing circuit will increase the noise of the signal. Correspondingly, the above reference configuration parameters and actual configuration parameters are actually the reference gain and actual gain of the low-noise amplifier in the signal processing circuit, respectively.
  • the monitoring device further includes a communication interface for performing data interaction with other terminal devices and / or servers.
  • the actual reference configuration parameters are stored in the server, so when the parsing device of the monitoring device obtains the actual reference configuration parameters, the communication interface of the monitoring device sends request information to the server according to the serial number of the signal processing circuit to obtain the signal processing.
  • the actual configuration parameters of the circuit are stored in the server, so when the parsing device of the monitoring device obtains the actual reference configuration parameters, the communication interface of the monitoring device sends request information to the server according to the serial number of the signal processing circuit to obtain the signal processing.
  • the actual configuration parameters of the circuit are stored in the server, so when the parsing device of the monitoring device obtains the actual reference configuration parameters, the communication interface of the monitoring device sends request information to the server according to the serial number of the signal processing circuit to obtain the signal processing.
  • the actual configuration parameters of the circuit are stored in the server, so when the parsing device of the monitoring device obtains the actual reference configuration parameters, the communication interface of the monitoring device
  • the above-mentioned preset mapping table is obtained after performing calibration on a plurality of monitoring device samples, so the preset mapping tables of all monitoring devices are consistent. Specifically, a signal with a known signal strength is connected to the antenna device of the monitoring device, and the signal strength indication information obtained by the analysis device is read at the same time. After multiple experiments, the signal strength and the signal strength indication information can be established.
  • the corresponding relationship table is the preset mapping relationship.
  • the above reference configuration parameters are obtained by measuring a plurality of signal processing circuit samples. Therefore, the reference configuration parameters are the same for all signal processing circuits and are default values.
  • the above-mentioned actual configuration parameters are obtained by individually measuring each signal processing circuit during the production of the single board, so each signal processing circuit corresponds to a separate actual configuration parameter, and each signal processing circuit is labeled. After associating the label of each signal processing circuit with the actual configuration parameter corresponding to the signal processing circuit, it is stored in the server, and when necessary, the corresponding actual configuration parameter is obtained according to the number of the signal processing circuit.
  • the signal strength of the wireless signal at each frequency point represents the actual value of the interference strength of the monitoring device at the frequency point. Therefore, after obtaining the signal strength of the wireless signal at each frequency point, the user can It is known through the intensity of the interference that the monitoring device receives at each frequency point that the monitoring device can monitor the monitoring range of the drone at each frequency point, and this application numbers and acquires signal processing by different signal processing circuits.
  • the actual configuration parameters of the circuit can be more accurately calibrated for each monitoring device, which further improves the accuracy of evaluating the signal strength of the wireless signal, that is, the accuracy of evaluating the monitoring range of the monitoring device.
  • the amplitude maps of the signal strengths at different frequency points are displayed. For example, to obtain the four frequencies of the wireless signal in the 2.4G band, 2.1GHZ, 2.2GHZ, 2.3GHZ, and 2.4GHZ, and four frequency points in the 5.8G band at 5.5GHZ, 5.6GHZ, 5.7GHZ, and 5.8GHZ.
  • the signal strength is plotted as shown in Figure 4, with the abscissa being the frequency and the ordinate being the signal strength.
  • the signal strength of the wireless signal at the frequency of 5.5GHZ is 0, so it can be regarded as the least interference to the monitoring device, so the monitoring device can have the most effective monitoring effect on the drone at the frequency of 5.5GHZ.
  • the monitoring range is the widest.
  • the user can know at which frequency point the external wireless signal has the least interference with the monitoring device, and according to the amplitude maps of the signal strength at different frequency points, To manually or automatically adjust the communication frequency of the monitoring device (such as the frequency of receiving wireless signals).
  • the signal strength of the wireless signal at each frequency point is transmitted to the remote via a wired or wireless method (4th generation mobile communication technology 4G, 5th generation mobile communication technology 5G, low frequency private network or Ethernet).
  • Supervision equipment, remote monitoring equipment can supervise information on the interactive interface.
  • the embodiment of the present application it is possible to artificially select whether to enable the function of environmental frequency sweeping and whether to enable the function of performing drone monitoring, thereby saving the power consumption of the monitoring device and improving the working efficiency of the monitoring device.
  • the embodiment of the present application also realizes the multiplexing of the monitoring link of the drone monitoring device, which can be used for both the drone monitoring and the frequency sweep test of the space wireless environment. Therefore, in the embodiment of the present application, the monitoring of the drone and the environment frequency sweeping are simultaneously implemented without adding a hardware device of the monitoring device.
  • the embodiment of the present application can also calibrate the signal strength of the wireless signal obtained by looking up the table of each monitoring device, further improving the accuracy of evaluating the signal strength of the wireless signal, that is, improving the accuracy of evaluating the monitoring range of the monitoring device. degree.
  • this application can also obtain the signal strength of the wireless signal at different frequency points, so that the customer can know at which frequency point the external wireless signal pair monitors based on the signal strength of the wireless signal at different frequency points. The interference of the device is minimal, and the communication frequency of the monitoring device is adjusted based on this.
  • the embodiments of the present application further improve the efficiency of the above evaluation method.
  • the embodiment of the present invention further provides a structural block diagram of a monitoring device as shown in FIG. 5.
  • the internal structure of the monitoring device may include at least an antenna device 510, a signal processing circuit 520, and an analysis device. 530.
  • one or more instructions stored in the computer storage medium are loaded and executed by the parsing device 530 to implement the corresponding steps of the method in the foregoing corresponding embodiments; in specific implementation, at least one of the computer storage media The instructions are loaded and executed by the parsing device 530. specific:
  • the antenna device 510 is configured to receive a wireless signal; the signal processing circuit 520 is configured to process (eg, amplify, filter, A / D convert, etc.) the wireless signal received by the antenna device to obtain an analytical signal; the analysis device 530 is configured to Obtain the above analysis signal, and then determine the strength indication information of the analysis signal, and estimate the signal strength of the wireless signal received by the antenna device according to the strength indication information of the analysis signal, where the signal strength of the wireless signal is used to evaluate the monitoring device pair. Drone monitoring range.
  • the analysis device 530 is specifically configured to estimate the signal strength of the wireless signal received by the antenna device according to the strength indication information of the parsed signal and a preset mapping table, wherein the preset mapping table is used to indicate the antenna device The correspondence between the signal strength of the received wireless signal and the strength indication information of the parsed signal.
  • the analysis device 530 is specifically configured to obtain reference configuration parameters and actual configuration parameters of the signal processing circuit; and estimate the reference signal strength of the wireless signal received by the antenna device according to the strength indication information of the parsed signal and a preset mapping table. ; Calibrate the reference signal strength of the wireless signal according to the reference configuration parameter and the actual configuration parameter to determine the signal strength of the wireless signal received by the antenna device.
  • the signal processing circuit 520 includes a low noise amplifier
  • the reference configuration parameter and the actual configuration parameter of the signal processing circuit 520 include a reference gain and an actual gain of the low noise amplifier.
  • the monitoring device further includes a communication interface 540, which is specifically configured to send request information to the server according to the serial number of the signal processing circuit 520 to obtain actual configuration parameters of the signal processing circuit 520.
  • the analysis device 530 is further configured to determine the intensity indication information of the parsed signal at each of a plurality of frequency points; according to the intensity indication of the parsed signal at each of the plurality of frequency points The information estimates the signal strength of the wireless signal received by the antenna device 510 at each of a plurality of frequency points.
  • the analysis device 530 is further configured to obtain a signal strength evaluation function status; if the signal strength evaluation function status is on, determine the strength indication information of the analysis signal.
  • the analysis signal includes the presence signal of the drone, and the analysis device 530 obtains the status of the drone monitoring function.
  • the analysis device is further configured to obtain the status of the drone monitoring function. When the drone monitoring function is on, the presence signal of the drone in the analysis signal is analyzed to obtain the status information of the drone included in the presence signal.
  • the state information of the drone includes the position information of the drone, the position information of the terminal device connected to the drone, the identification information of the drone, and the flight parameters of the drone. At least one.
  • the monitoring device further includes a communication interface 540 for sending the signal strength of the wireless signal to the remote monitoring device.
  • the communication interface 540 may be a wired communication interface; in some embodiments, the communication interface 540 may be a wireless communication interface, and the communication interface 540 may be electrically connected to the antenna device 510. For connection, the communication interface 540 may send the signal strength or request information of the wireless signal through the antenna device 510.
  • the monitoring device further includes a memory for storing a computer program.
  • the computer program includes program instructions.
  • the analyzing device 530 may be configured to execute the program instructions stored in the memory.
  • the memory may include a read-only memory and a random access memory, and provide instructions and data to the analysis device 530. Therefore, the analysis device 530 and the memory are not limited here.
  • the analysis device may be a central processing unit (CPU), and the processor may also be another general-purpose processor, that is, a microprocessor or any conventional processor, such as digital signal processing.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Ready-made Programmable Gate Array
  • FPGA Field-Programmable Gate Array
  • an embodiment of the present invention further provides a schematic structural diagram of a monitoring device as shown in FIG. 6.
  • the monitoring device includes a first obtaining unit 610 for obtaining analysis.
  • a signal, the parsed signal is obtained by processing a wireless signal received by an antenna device of the monitoring device by a signal processing circuit of the monitoring device; and further includes a determining unit 620 for determining strength indication information of the parsed signal ; Further comprising an estimation unit 630, configured to estimate the signal strength of the wireless signal received by the antenna device according to the strength indication information of the parsed signal, wherein the signal strength of the wireless signal is used to evaluate the performance of the monitoring device on all signals.
  • the monitoring range of the drone is described.
  • the estimation unit 630 is configured to estimate the signal strength Pn of the wireless signal received by the antenna device according to the strength indication information of the parsed signal and a preset mapping table, where the preset mapping table is used to indicate A correspondence between a signal strength of a wireless signal received by the antenna device and strength analysis information of the parsed signal.
  • the estimation unit 630 includes an acquisition subunit 631, an estimation subunit 632, and a calibration subunit 633.
  • the acquisition subunit 631 is configured to acquire reference configuration parameters and actual configuration parameters of the signal processing circuit.
  • An estimation subunit 632 configured to estimate a reference signal strength of a wireless signal received by the antenna device according to the strength indication information of the parsed signal and the preset mapping table; a calibration subunit 633, configured to according to the reference configuration
  • the parameters and the actual configuration parameters are used to calibrate a reference signal strength of the wireless signal to determine a signal strength of the wireless signal received by the antenna device.
  • the signal processing circuit includes a low noise amplifier
  • the reference configuration parameters and actual configuration parameters of the antenna device include a reference gain and an actual gain of the low noise amplifier.
  • the first obtaining unit 610 includes a sending subunit 611 and a receiving subunit 612.
  • the sending subunit 611 is configured to send request information to a server according to a serial number of the signal processing circuit.
  • a subunit 612 is configured to obtain actual configuration parameters of the signal processing circuit.
  • the determining unit 620 is configured to determine the strength indication information of the parsed signal at each of a plurality of frequency points; and the estimation unit 630 is configured to determine the parsed signal at the plurality of frequencies according to the parsed signal.
  • the strength indication information of each frequency point among the points estimates the signal strength of the wireless signal received by the antenna device at each of the plurality of frequency points.
  • the monitoring device further includes a second obtaining unit 640 for obtaining a signal strength evaluation function status.
  • the determining unit 620 is further configured to: if the signal strength evaluation function status is on. , Determining the strength indication information of the parsed signal.
  • the analysis signal includes a presence signal of a drone.
  • the monitoring device further includes a parsing unit 650 for parsing a drone presence signal in the parsing signal to obtain the presence signal when the drone monitoring function is on. Contains status information for the drone.
  • the state information of the drone includes the position information of the drone, the position information of the terminal device connected to the drone, the identification information of the drone, and the drone. At least one of the flight parameters.
  • the monitoring device further includes a sending unit 660, configured to send a signal strength of the wireless signal to a remote monitoring device.
  • a first acquisition unit is used to obtain a parsed signal of a wireless signal
  • a determination unit is used to determine signal strength indication information of the parsed signal
  • an estimation unit is used to evaluate the signal strength of the wireless signal, so that the user can receive the signal according to the monitoring device.
  • the signal strength of the received wireless signal is used to know the strength of the signal interference received by the monitoring device, so as to know that the monitoring device can monitor the monitoring range of the drone. Therefore, the present application directly scans the environment by using the monitoring device itself. Compared with third-party frequency scanning, it can more accurately evaluate the intensity of the interference received by the monitoring device, and it can also use the intensity of the interference received by the monitoring device to more accurately. A good reflection of the monitoring range of the monitoring device.
  • the program can be stored in a computer-readable storage medium.
  • the program When executed, the processes of the embodiments of the methods described above may be included.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random, Access Memory, RAM).

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  • Computer Networks & Wireless Communication (AREA)
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  • General Physics & Mathematics (AREA)
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  • Remote Sensing (AREA)
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Abstract

La présente invention concerne un procédé d'estimation, un dispositif de surveillance et un support de stockage informatique. Le procédé comprend : l'acquisition d'un signal analysé, le signal analysé étant obtenu par un circuit de traitement de signal d'un dispositif de surveillance traitant un signal sans fil reçu par un appareil d'antenne du dispositif de surveillance (S201); la détermination d'informations d'indication d'intensité du signal analysé (S202); et l'estimation, en fonction des informations d'indication d'intensité du signal analysé, de l'intensité de signal du signal sans fil reçu par l'appareil d'antenne, l'intensité de signal du signal sans fil étant utilisée pour évaluer la plage de surveillance d'un véhicule aérien sans pilote par le dispositif de surveillance (S203). Selon le procédé, grâce à l'acquisition d'informations d'analyse obtenues par l'analyse d'un signal sans fil reçu par un dispositif de surveillance, à la détermination d'informations d'indication d'intensité du signal analysé et à la détermination de l'intensité de signal du signal sans fil en fonction des informations d'intensité, un utilisateur connaît de la taille d'une plage de surveillance d'un véhicule aérien sans pilote par le dispositif de surveillance en fonction de l'amplitude de l'intensité du signal sans fil. L'invention concerne également un procédé d'évaluation d'une plage de détection d'un dispositif de surveillance.
PCT/CN2018/108431 2018-09-28 2018-09-28 Procédé d'estimation, dispositif de surveillance et support de stockage lisible par ordinateur WO2020062066A1 (fr)

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PCT/CN2018/108431 WO2020062066A1 (fr) 2018-09-28 2018-09-28 Procédé d'estimation, dispositif de surveillance et support de stockage lisible par ordinateur

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