Foreign matter detection method and device, storage medium and electronic equipment

Abstract

The invention relates to the field of radar detection, in particular to a foreign matter detection method and device, a storage medium and electronic equipment. The method comprises the following steps: sending a detection signal to a target detection area according to a meteorological condition of the target detection area, and receiving a returned echo signal; according to the echo signal, a foreign matter detection result of the target detection area is determined, and the foreign matter detection result is used for representing the foreign matter existence condition of the target detection area. Through the method, corresponding signal types can be flexibly adjusted and matched according to weather conditions for transmission, foreign matter detection can be carried out under different weather conditions, the stability and reliability of foreign matter detection under complex environments and severe weather conditions are improved, and the accuracy and efficiency of foreign matter detection are improved. And the foreign matters on the runway can be accurately and reliably found under the severe weather condition, so that the flight safety is guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the field of radar detection, and in particular to a foreign object detection method, device, storage medium and electronic equipment. Background Art

[0002] During the use and maintenance of airport runways, foreign objects such as metal devices, machine tools, rubber scraps, and concrete fragments often appear on the runways. Foreign objects may be sucked into aircraft engines or enter mechanical devices such as landing gear, causing damage to aircraft tires, thereby endangering flight safety. Therefore, confirming that there are no foreign objects on the runway is an important factor in ensuring flight safety, and therefore, it is particularly important to detect foreign objects on the runway.

[0003] The existing airport runway foreign object detection equipment is affected by the weather, which can cause the system to generate false alarms. Once a false alarm occurs, it usually requires the intervention of staff to deal with it. However, in the case of high runway usage, staff cannot go on the runway for on-site inspections at any time. After the system detection results are fed back to the staff, due to various factors such as personal experience differences and line of sight limitations, the staff's judgment of the results is often uncertain, which greatly reduces the reliability of the entire detection system.

[0004] Especially in adverse weather conditions such as rain and fog, foreign object detection on the runway becomes particularly difficult. When foreign objects are present, the inaccurate detection data or untimely feedback will significantly extend the manual confirmation time, which will in turn increase the runway downtime. This will not only make the staff feel exhausted, but may also have an adverse impact on the departure rate of flights. What's more serious is that when the manual confirmation results are biased, it may even pose a potential threat to flight safety and trigger a series of serious consequences.

[0005] Therefore, in order to improve the accuracy and reliability of foreign object detection on airport runways, it is necessary to seek more efficient and effective technical means to overcome the limitations of existing detection equipment and ensure that flight safety is guaranteed to the greatest extent. Summary of the invention

[0006] The main purpose of the present disclosure is to provide a foreign object detection method, device, storage medium and electronic device, aiming to solve the limitations of existing foreign object detection equipment and improve the accuracy and reliability of foreign object detection on airport runways.

[0007] To achieve the above objectives, the present disclosure provides a foreign body detection method for detecting equipment, comprising:

[0008] According to the meteorological conditions of the target detection area, a detection signal is sent to the target detection area, and a returned echo signal is received; the echo signal is a reflection signal corresponding to the detection signal generated based on the foreign matter in the target detection area;

[0009] A foreign object detection result of the target detection area is determined according to the echo signal, wherein the foreign object detection result is used to characterize the presence of foreign objects in the target detection area.

[0010] Optionally, sending a corresponding detection signal to the target detection area according to the meteorological conditions of the target detection area, and receiving a returned echo signal, includes:

[0011] Determine whether the meteorological conditions in the target detection area meet the preset meteorological conditions, wherein the preset meteorological conditions include meteorological conditions corresponding to rainy and foggy weather;

[0012] When the meteorological conditions of the target detection area meet the preset meteorological conditions, a circular polarization signal is sent to the target detection area, and a circular polarization echo signal returned by the target detection area is received.

[0013] Optionally, the circularly polarized signal is a left-hand circularly polarized signal;

[0014] When there is a foreign object in the target detection area, the circularly polarized echo signal is a right-hand circularly polarized echo signal;

[0015] When there is no foreign object in the target detection area, the circularly polarized echo signal is a left-handed circularly polarized echo signal.

[0016] Optionally, the sending of a corresponding detection signal to the target detection area according to the meteorological conditions of the target detection area and receiving a returned echo signal further includes:

[0017] When the meteorological conditions in the target detection area do not meet the preset meteorological conditions, a vertical polarization signal is sent to the target detection area, and a vertical polarization echo signal returned by the target detection area is received.

[0018] Optionally, it also includes:

[0019] Determine whether there is a foreign object in the target detection area according to the foreign object detection result;

[0020] When determining whether there is a foreign object in the target detection area, calculation is performed according to the foreign object detection result to determine the position information of the foreign object in the target detection area.

[0021] Optionally, performing calculation according to the foreign object detection result to determine the position information of the foreign object in the target detection area includes:

[0022] Determine the horizontal signal component and the vertical signal component of the circularly polarized echo signal according to the foreign object detection result;

[0023] Based on the horizontal signal component and the vertical signal component, determining a difference frequency signal between the circular polarization signal and the circular polarization echo signal, and determining a signal parameter of the difference frequency signal;

[0024] Calculation is performed based on the signal parameters of the difference frequency signal to determine the position information of the foreign object.

[0025] Optionally, the calculating according to the signal parameters of the difference frequency signal to determine the position information of the foreign object includes:

[0026] Calculate according to the signal parameters of the difference frequency signal to determine the distance information of the foreign object;

[0027] Determining the location information of the foreign object based on the distance information of the foreign object;

[0028] The distance information of the foreign object satisfies the following relationship:

[0029]

[0030] Where D represents the distance between the detection device corresponding to the transmitting antenna and the foreign object, c represents the propagation speed of the electromagnetic wave corresponding to the circularly polarized signal and the circularly polarized echo signal in the air, T represents the frequency modulation period, B represents the bandwidth of the detection device, and f s Indicates the frequency of the difference frequency signal.

[0031] In addition, to achieve the above objectives, the present disclosure also provides a foreign body detection device, comprising:

[0032] A signal transceiver module, used to send a corresponding detection signal to the target detection area according to the meteorological conditions of the target detection area, and receive a returned echo signal; the echo signal is a reflection signal corresponding to the detection signal generated based on the foreign matter in the target detection area;

[0033] A determination module is used to determine a foreign object detection result of the target detection area according to the echo signal, wherein the foreign object detection result is used to characterize the presence of foreign objects in the target detection area.

[0034] In addition, to achieve the above objectives, the present disclosure also provides a computer-readable storage medium, on which a computer program is stored, and a processor executes the computer program to implement the above method.

[0035] In addition, to achieve the above-mentioned purpose, the present disclosure also provides an electronic device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the above-mentioned method.

[0036] In addition, to achieve the above objectives, the present disclosure also provides a computer program product, which implements the above method when executed by a processor.

[0037] The beneficial effects that can be achieved by the present disclosure.

[0038] Through the above technical solution, the corresponding detection signal can be sent to the target detection area according to the meteorological conditions of the target detection area, and after receiving the echo signal corresponding to the detection signal generated based on the foreign object in the target detection area, the foreign object detection result of the target detection area is determined according to the echo signal. In this way, based on different weather conditions, the detection signal corresponding to the weather condition can be sent to the target detection area, and the reflection signal corresponding to the detection signal can be received, and then the foreign object detection result of the target detection area can be obtained according to the detection signal and its corresponding reflection signal. In this way, it is possible to flexibly adjust according to the weather conditions, match the corresponding signal type and send it, and foreign object detection can be performed under different weather conditions, which improves the stability and reliability of foreign object detection in complex environments and severe weather conditions, further improves the accuracy and efficiency of foreign object detection, and ensures that foreign objects on the airport runway can be accurately and reliably found under severe weather conditions, thereby ensuring flight safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0040] Figure 1 A schematic diagram of the device structure of the hardware operating environment involved in the embodiment of the present disclosure;

[0041] Figure 2 It is a schematic diagram of the process of the first embodiment of the foreign body detection method disclosed in the present invention;

[0042] Figure 3 A cross-sectional view of a runway according to a first embodiment of the foreign body detection method disclosed herein;

[0043] Figure 4 It is a cross-sectional view of the operation of the first embodiment of the foreign body detection method disclosed in the present invention;

[0044] Figure 5 It is a schematic diagram of the signal processing process of the first embodiment of the foreign body detection method disclosed in the present invention;

[0045] Figure 6 It is a schematic diagram of the installation of the first embodiment of the foreign body detection system disclosed in the present invention;

[0046] Figure 7 It is a top view of the operation of the first embodiment of the foreign body detection system disclosed in the present invention;

[0047] Figure 8 It is a structural block diagram of the first embodiment of the foreign body detection device disclosed in the present invention.

[0048] The realization of the objectives, functional features and advantages of the present disclosure will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0050] Reference Figure 1 , Figure 1 The figure is a schematic diagram of the device structure of the hardware operating environment involved in the embodiment of the present disclosure.

[0051] Typically, the device includes: at least one processor 301, a memory 302, and a foreign object detection program stored in the memory 302 and executable on the processor 301, wherein the foreign object detection program is configured to implement the steps of the foreign object detection method as described above.

[0052] The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 301 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 301 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state.

[0053] In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. The processor 301 may also include an AI (Artificial Intelligence) processor, which is used to process the operation of the foreign body detection method, so that the foreign body detection method model can be trained and learned autonomously to improve efficiency and accuracy.

[0054] The memory 302 may include one or more storage media, which may be non-transitory. The memory 302 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory storage medium in the memory 302 is used to store at least one instruction, which is used to be executed by the processor 301 to implement the foreign body detection method provided in the method embodiment of the present disclosure.

[0055] In some embodiments, the terminal may further optionally include: a communication interface 303 and at least one peripheral device. The processor 301, the memory 302 and the communication interface 303 may be connected via a bus or a signal line. Each peripheral device may be connected to the communication interface 303 via a bus, a signal line or a circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 304, a display screen 305 and a power supply 306.

[0056] The communication interface 303 may be used to connect at least one peripheral device related to I / O (Input / Output) to the processor 301 and the memory 302. In some embodiments, the processor 301, the memory 302, and the communication interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 301, the memory 302, and the communication interface 303 may be implemented on a separate chip or circuit board, which is not limited in this embodiment.

[0057] The radio frequency circuit 304 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 304 communicates with the communication network and other communication devices through electromagnetic signals. The radio frequency circuit 304 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 304 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, and the like. The radio frequency circuit 304 can communicate with other terminals through at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: a metropolitan area network, various generations of mobile communication networks (2G, 3G, 4G and 5G), a wireless local area network and / or a WiFi (Wireless Fidelity) network. In some embodiments, the radio frequency circuit 304 may also include circuits related to NFC (Near Field Communication), which is not limited in the present disclosure.

[0058] The display screen 305 is used to display the UI (User Interface). The UI may include graphics, text, icons, videos, and any combination thereof. When the display screen 305 is a touch display screen, the display screen 305 also has the ability to collect touch signals on the surface or above the surface of the display screen 305. The touch signal can be input to the processor 301 as a control signal for processing. At this time, the display screen 305 can also be used to provide virtual buttons and / or virtual keyboards, also known as soft buttons and / or soft keyboards. In some embodiments, the display screen 305 can be a front panel of an electronic device; in other embodiments, the display screen 305 can be at least two, respectively arranged on different surfaces of the electronic device or in a folding design; in some embodiments, the display screen 305 can be a flexible display screen, arranged on a curved surface or a folding surface of the electronic device. Even, the display screen 305 can also be set to a non-rectangular irregular shape, that is, a special-shaped screen. The display screen 305 can be made of materials such as LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), etc.

[0059] The power supply 306 is used to power various components in the electronic device. The power supply 306 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery. When the power supply 306 includes a rechargeable battery, the rechargeable battery can support wired charging or wireless charging. The rechargeable battery can also be used to support fast charging technology. Those skilled in the art will understand that Figure 1The structure shown in the figure does not constitute a limitation of the device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0060] In addition, an embodiment of the present disclosure further proposes a storage medium, on which a foreign object detection program is stored, and when the foreign object detection program is executed by a processor, the steps of the foreign object detection method described above are implemented. Therefore, it will not be repeated here. In addition, the description of the beneficial effects of adopting the same method will not be repeated. For technical details not disclosed in the storage medium embodiment involved in the present disclosure, please refer to the description of the method embodiment of the present disclosure. As an example, the program instructions can be deployed to be executed on one device, or on multiple devices located at one location, or on multiple devices distributed at multiple locations and interconnected by a communication network.

[0061] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the above-mentioned program can be stored in a storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the above-mentioned storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0062] First of all, it should be understood that water droplets and fog in rainy and foggy weather will scatter and absorb electromagnetic waves, which will cause the attenuation of electromagnetic wave energy, thereby affecting the strength and stability of the detection signal. For vertically polarized waves, since the electric field vector is perpendicular to the ground, it may be more susceptible to the vertical water droplets and fog in rainy and foggy weather, resulting in more significant signal attenuation. On the other hand, the reduced visibility in rainy and foggy weather will affect the line of sight of the detection equipment, making it more difficult to identify and locate the target. In vertical polarization detection, if the target is obscured by rain and fog, the detection equipment may not be able to accurately receive the target's reflected signal, thus affecting the accuracy and reliability of the detection.

[0063] In addition, rainy and foggy weather may also cause multipath effects and refraction of electromagnetic waves, resulting in changes in the signal propagation path and a decrease in signal quality. These effects may change the polarization state of electromagnetic waves for vertically polarized waves, further affecting detection performance.

[0064] It can be seen that rainy and foggy weather has problems such as signal attenuation, reduced visibility, and changes in the electromagnetic wave propagation path for foreign object detection using vertical polarization. These problems may lead to a shortened detection distance, a decrease in detection accuracy, and an increased difficulty in target identification and positioning. Therefore, based on different meteorological conditions, the disclosed system sends a specific detection signal to the target detection area and receives the returned echo signal. In this way, the runway in rainy and foggy weather can be detected more accurately, and the presence of foreign objects in the target detection area can be accurately determined in time under different weather conditions, so that the data of foreign objects in rainy and foggy weather can be presented to the airport foreign object management platform in real time through the back-end control and processing software, and the staff can be guided to clean the runway in time.

[0065] Reference Figure 2 , Figure 2 This is a flow chart of the first embodiment of the foreign body detection method disclosed in the present invention. The foreign body detection method is used for detecting equipment and specifically includes the following steps:

[0066] Step S11: according to the meteorological conditions of the target detection area, a corresponding detection signal is sent to the target detection area, and a returned echo signal is received; the echo signal is a reflection signal corresponding to the detection signal generated based on foreign matter in the target detection area.

[0067] Step S12: determining a foreign object detection result of the target detection area according to the echo signal, wherein the foreign object detection result is used to characterize the presence of foreign objects in the target detection area.

[0068] Through the above technical solution, the corresponding detection signal can be sent to the target detection area according to the meteorological conditions of the target detection area, and after receiving the echo signal corresponding to the detection signal generated based on the foreign object in the target detection area, the foreign object detection result of the target detection area is determined according to the echo signal. In this way, the detection signal corresponding to the weather condition can be sent to the target detection area based on different weather conditions, and the reflection signal corresponding to the detection signal can be received, and then the foreign object detection result of the target detection area can be obtained according to the detection signal and its corresponding reflection signal. In this way, it is possible to flexibly adjust according to the meteorological conditions of the target detection area, match the corresponding signal type and send and receive, so as to detect foreign objects under different weather conditions, improve the stability and reliability of foreign object detection in complex environments and severe weather conditions, further improve the accuracy and efficiency of foreign object detection, and ensure that foreign objects on the airport runway can be accurately and reliably found under severe weather conditions, thereby ensuring flight safety.

[0069] In a possible manner, based on the meteorological conditions of the target detection area, sending a corresponding detection signal to the target detection area and receiving a returned echo signal include:

[0070] Determine whether the meteorological conditions in the target detection area meet the preset meteorological conditions, which include meteorological conditions corresponding to rainy and foggy weather;

[0071] When the meteorological conditions in the target detection area meet the preset meteorological conditions, a circular polarization signal is sent to the target detection area, and a circular polarization echo signal returned by the target detection area is received.

[0072] For example, the meteorological factors in the target detection area can be determined by acquiring sensor data from the sensor, and then, based on the meteorological factors in the target detection area, it is determined whether the meteorological conditions in the target detection area meet the preset meteorological conditions. The preset meteorological conditions can be, for example, factors such as air humidity and visibility that are greater than a preset threshold. Of course, other methods can also be used to acquire the meteorological factors in the target detection area, and other methods can be used to determine whether the target detection area meets the preset meteorological conditions, which is not specifically limited in the embodiments of the present disclosure. The preset meteorological conditions can also be adjusted according to the specific application scenario, which is not specifically limited in the embodiments of the present disclosure.

[0073] It should be understood that when a circularly polarized wave encounters a symmetrical object (such as a raindrop), its polarization direction will be reversed, and when it encounters an asymmetric target (such as an aircraft, a missile, etc.), the reflected wave will have a circularly polarized component with the same direction. In rainy and foggy weather, circularly polarized signals can better cope with the interference of symmetrical objects such as raindrops and improve the reliability of signal transmission. Therefore, when the meteorological conditions in the target detection area meet the preset meteorological conditions, a circularly polarized signal is sent to the target detection area, and a circularly polarized echo signal returned from the target detection area is received.

[0074] In a possible manner, the circularly polarized signal is a left-hand circularly polarized signal;

[0075] When there is a foreign object in the target detection area, the circular polarization echo signal is a right-hand circular polarization echo signal;

[0076] When there is no foreign object in the target detection area, the circularly polarized echo signal is a left-hand circularly polarized echo signal.

[0077] It should be understood that the airport runway is not a horizontal surface, but an arched surface with a certain slope. The runway interface is shown in the figure below. Figure 3As shown. Due to the different reflection characteristics of the airport runway and the foreign object airport, after transmitting the left-hand circularly polarized signal to the target detection area, if there is a foreign object in the target detection area, the rotation direction of the circularly polarized signal changes, and the circularly polarized echo signal reflected by the foreign object based on the circularly polarized signal is a right-hand circularly polarized echo signal. If there is no foreign object in the target detection area, the rotation direction of the circularly polarized signal does not change, and the airport runway reflects the left-hand circularly polarized echo signal back based on the left-hand circularly polarized signal. Among them, the operating cross-section diagram of transmitting the left-hand circularly polarized signal and receiving the right-hand circularly polarized echo signal is shown in Figure 4 shown.

[0078] In another possible manner, based on the meteorological conditions of the target detection area, sending a corresponding detection signal to the target detection area and receiving a returned echo signal also includes:

[0079] When the meteorological conditions in the target detection area do not meet the preset meteorological conditions, a vertical polarization signal is sent to the target detection area, and a vertical polarization echo signal returned by the target detection area is received.

[0080] It should be understood that vertical polarization signals have better penetration and stability in clear weather, so the transmission effect is better. Therefore, the present disclosure can transmit vertical polarization signals to the target detection area when the meteorological conditions are good, such as clear weather, and transmit circular polarization signals to the target detection area to detect foreign objects when the meteorological conditions are bad, such as rainy and foggy weather. This can adapt to different weather conditions. This mixed use method helps to improve the reliability and performance of the entire communication system.

[0081] Of course, when it is determined that the target detection area does not meet the meteorological conditions, other methods can be used to detect foreign objects in the target detection area, and the embodiments of the present disclosure do not specifically limit this.

[0082] In a possible manner, it is also possible to determine whether there is a foreign object in the target detection area according to the foreign object detection result;

[0083] When determining whether there is a foreign object in the target detection area, calculation is performed based on the foreign object detection result to determine the position information of the foreign object in the target detection area.

[0084] In a possible manner, calculation is performed based on the foreign body detection result to determine the location information of the foreign body in the target detection area, including:

[0085] According to the foreign body detection result, determine the horizontal signal component and the vertical signal component of the circularly polarized echo signal;

[0086] Based on the horizontal signal component and the vertical signal component, determining a difference frequency signal of the circular polarization signal and the circular polarization echo signal, and determining a signal parameter of the difference frequency signal;

[0087] The location information of the foreign object is determined by calculating the signal parameters of the difference frequency signal.

[0088] It should be understood that the difference frequency signal is the frequency difference between the transmitted signal and the received reflected signal. By measuring the frequency of the difference frequency signal, the time difference between the transmitted wave and the reflected wave can be determined, and then the distance between the device and the foreign object can be calculated. Therefore, after receiving the right-hand circularly polarized wave reflected by the foreign object for the transmitted left-hand circularly polarized wave, the signal parameters of the difference frequency signal can be used to calculate and provide higher accuracy. Compared with the method of directly calculating the distance between the detection device and the foreign object based on the time difference between transmission and reception, the measurement of frequency is usually more stable and accurate than directly measuring time.

[0089] Specifically, the method of using the difference frequency signal to calculate the distance can reduce the need for high-speed timing equipment. Directly measuring the time difference usually requires high-speed, high-precision timing equipment, which may be expensive and technically complex. The method disclosed in the present invention uses the difference frequency signal for calculation, which only needs to measure the frequency or period, which can be achieved through relatively simple circuits and algorithms, reducing the complexity and cost of the system.

[0090] In addition, the method of using the difference frequency signal for calculation also has strong anti-interference ability. In a complex electromagnetic environment, direct measurement of time difference may be affected by noise and interference, resulting in errors in the measurement results. Since the frequency measurement can reduce the influence of noise through filtering and averaging techniques, the difference frequency signal usually has a higher signal-to-noise ratio, which can improve the stability and reliability of the measurement.

[0091] For example, in order to extract useful information from the signal, improve reception quality, analyze target characteristics, and optimize system performance, the circularly polarized echo signal can be divided into a horizontal signal component and a vertical signal component, and then the echo signal model is determined according to the horizontal signal component and the vertical signal component. The echo signal model can be expressed by the following calculation formula:

[0092]

[0093] Among them, S r (t) represents the echo signal received at time t, X represents the amplitude modulation factor, A represents the signal amplitude of the echo signal, f0 represents the initial frequency of the echo signal, t1 represents the fixed signal delay time between the received signal and the transmitted signal, B represents the bandwidth of the detection equipment, T represents the frequency modulation period, It represents the initial phase of the echo signal, and D represents the distance between the detection device corresponding to the transmitting antenna and the foreign object.

[0094] It should also be understood that when the foreign object in the target detection area is stationary, there is no Doppler frequency deviation between the foreign object and the detection device, and there is only a time delay between the echo signal and the transmission signal. Therefore, the echo signal waveform is the left-right translation of the transmission signal waveform along the time axis, such as Figure 5 shown.

[0095] For example, the phase A of the echo signal r (t) is:

[0096]

[0097] For example, the received echo signal and the transmitted signal may be sequentially passed through a mixer and a low-pass filter to obtain a single-frequency sine wave signal, namely, a difference frequency signal, such as Figure 5 The intermediate frequency signal, A r (t) represents the phase of the transmitted signal. The phase of the difference frequency signal can be expressed by the following calculation formula:

[0098]

[0099] Then, the instantaneous angular frequency can be obtained by taking the derivative of the phase of the difference frequency signal with respect to time. The instantaneous angular frequency is then divided by 2π to obtain the instantaneous frequency. Therefore, the frequency f of the difference frequency signal is s for:

[0100]

[0101] In a possible manner, calculating based on the signal parameters of the difference frequency signal to determine the location information of the foreign object includes:

[0102] Calculate based on the signal parameters of the difference frequency signal to determine the distance information of the foreign object;

[0103] Determine the location information of the foreign object based on the distance information of the foreign object;

[0104] The distance information of foreign objects satisfies the following relationship:

[0105]

[0106] Where D represents the distance between the detection device corresponding to the transmitting antenna and the foreign object, c represents the propagation speed of the electromagnetic wave corresponding to the circularly polarized signal and the circularly polarized echo signal in the air, T represents the frequency modulation period, B represents the bandwidth of the detection device, and f s Indicates the frequency of the difference frequency signal.

[0107] For example, the detection device includes a transmitting antenna and a receiving antenna, the transmitting antenna includes a vertical linear polarization transmitting antenna and a circular polarization transmitting antenna, the receiving antenna includes a vertical polarization receiving antenna and a circular polarization receiving antenna, and the detection device is used to transmit signals to a target detection area and receive echo signals reflected by foreign objects in the target detection area.

[0108] It should be understood that when the target detection area meets the preset meteorological conditions, the circularly polarized transmitting antenna and the circularly polarized receiving antenna can work, and when the target detection area does not meet the preset meteorological conditions, the vertically linearly polarized transmitting antenna and the vertically polarized receiving antenna can work.

[0109] For example, the detection equipment also includes a computing and analyzing device, a control and processing device, and a foreign matter management device;

[0110] The computing and analyzing device is used to perform calculations based on the signals transmitted and received by the detection device to determine the location information of the foreign object in the target detection area;

[0111] The control processing device is used to control the detection device to transmit signals and / or receive signals;

[0112] The foreign object management device is used to receive the location information of foreign objects in the target detection area output by the calculation and analysis device, and generate a foreign object handling strategy according to the location information of the foreign objects.

[0113] For example, the detection equipment can be deployed at the shoulders of both sides of the runway, the computing and analysis equipment can be deployed on the server in the computer room, and the control and processing equipment can be deployed in the airport monitoring room. The detection equipment can communicate with the computing and analysis equipment and the control and processing equipment through a wireless network or an optical fiber ring network to achieve information interaction. The embodiments of the present disclosure do not specifically limit the installation, connection, and deployment methods of each device.

[0114] Figure 6 FIG. 1 is a schematic diagram of the installation of the first embodiment of the foreign body detection system disclosed in the present invention. Figure 6 As shown, the detection equipment includes a plurality of sub-equipment, and the plurality of sub-equipment is arranged at the shoulder position of the airport runway according to a preset spacing. The plurality of sub-equipment can be arranged in a straight line at intervals of 60 meters, and arranged 3m inside the vertical runway edge light on the shoulder. In order to comply with the installation specifications of the airport runway shoulder equipment, a foldable bracket can be used for installation. Of course, the installation method of the plurality of detection sub-equipment can be adaptively adjusted according to the specific conditions of the airport runway and the corresponding installation specifications, that is, the plurality of detection sub-equipment can also be installed at other positions of the runway according to other installation methods such as other spacing distances, and the embodiments of the present disclosure do not specifically limit this.

[0115] based on Figure 6 The installation diagram of multiple detection sub-devices is shown in FIG. 1 , and the top view of the detection sub-device operation is shown in FIG. Figure 7shown.

[0116] Reference Figure 8 , Figure 8 This is a structural block diagram of the first embodiment of the foreign body detection device disclosed in the present invention. Based on the same inventive concept as the above-mentioned embodiment, the device includes:

[0117] The signal transceiver module 10 is used to send a detection signal to the target detection area based on the meteorological conditions of the target detection area, and receive a returned echo signal; the echo signal is a reflection signal corresponding to the detection signal generated based on the foreign matter in the target detection area;

[0118] The determination module 20 is used to determine the foreign object detection result of the target detection area according to the echo signal, wherein the foreign object detection result is used to characterize the presence of foreign objects in the target detection area.

[0119] Optionally, the signal transceiver module 10 is used to:

[0120] Determine whether the meteorological conditions in the target detection area meet the preset meteorological conditions, wherein the preset meteorological conditions include meteorological conditions corresponding to rainy and foggy weather;

[0121] When the meteorological conditions of the target detection area meet the preset meteorological conditions, a circular polarization signal is sent to the target detection area, and a circular polarization echo signal returned by the target detection area is received.

[0122] Optionally, the circularly polarized signal is a left-hand circularly polarized signal;

[0123] When there is a foreign object in the target detection area, the circularly polarized echo signal is a right-hand circularly polarized echo signal;

[0124] When there is no foreign object in the target detection area, the circularly polarized echo signal is a left-handed circularly polarized echo signal.

[0125] Optionally, the signal transceiver module 10 is used to:

[0126] When the meteorological conditions in the target detection area do not meet the preset meteorological conditions, a vertical polarization signal is sent to the target detection area, and a vertical polarization echo signal returned by the target detection area is received.

[0127] Optionally, the foreign matter detection device further includes:

[0128] A determination module, used to determine whether there is a foreign object in the target detection area according to the foreign object detection result;

[0129] The calculation module is used to determine the position information of the foreign object in the target detection area by performing calculation according to the foreign object detection result when there is a foreign object in the target detection area.

[0130] Optionally, the calculation module is used to:

[0131] Determine the horizontal signal component and the vertical signal component of the circularly polarized echo signal according to the foreign object detection result;

[0132] Based on the horizontal signal component and the vertical signal component, determining a difference frequency signal between the circular polarization signal and the circular polarization echo signal, and determining a signal parameter of the difference frequency signal;

[0133] Calculation is performed based on the signal parameters of the difference frequency signal to determine the position information of the foreign object.

[0134] Optionally, the calculating according to the signal parameters of the difference frequency signal to determine the position information of the foreign object includes:

[0135] Calculate according to the signal parameters of the difference frequency signal to determine the distance information of the foreign object;

[0136] Determining the location information of the foreign object based on the distance information of the foreign object;

[0137] The distance information of the foreign object satisfies the following relationship:

[0138]

[0139] Where D represents the distance between the detection device corresponding to the transmitting antenna and the foreign object, c represents the propagation speed of the electromagnetic wave corresponding to the circularly polarized signal and the circularly polarized echo signal in the air, T represents the frequency modulation period, B represents the bandwidth of the detection device, and f s Indicates the frequency of the difference frequency signal.

[0140] It should be noted that, since the steps executed by the device of this embodiment are the same as the steps of the aforementioned method embodiment, its specific implementation method and the technical effects that can be achieved can refer to the aforementioned embodiment and will not be repeated here.

[0141] In addition, in one embodiment, an embodiment of the present disclosure further provides an electronic device, which includes a processor, a memory, and a computer program stored in the memory, and the computer program implements the steps of the method in the aforementioned embodiment when executed by the processor.

[0142] In addition, in one embodiment, an embodiment of the present disclosure further provides a computer storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method in the aforementioned embodiment are implemented.

[0143] In some embodiments, the computer readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash memory, magnetic surface memory, optical disk, or CD-ROM; or various devices including one or any combination of the above memories. The computer may be various computing devices including intelligent terminals and servers.

[0144] In some embodiments, executable instructions may be in the form of a program, software, software module, script or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine or other unit suitable for use in a computing environment.

[0145] As an example, executable instructions may, but need not, correspond to a file in a file system, may be stored as part of a file that stores other programs or data, such as in one or more scripts in a HyperText Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or code portions).

[0146] By way of example, executable instructions may be deployed to be executed on one computing device, or on multiple computing devices located at one site, or on multiple computing devices distributed across multiple sites and interconnected by a communication network.

[0147] It should be noted that, in this article, the terms "include", "may include" or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0148] The serial numbers of the above-mentioned embodiments of the present disclosure are only for description and do not represent the advantages or disadvantages of the embodiments.

[0149] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present disclosure, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory / random access memory, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a multimedia terminal device (which can be a mobile phone, a computer, a television receiver, or a network device, etc.) to execute the methods described in each embodiment of the present disclosure.

[0150] The above descriptions are only optional embodiments of the present disclosure, and are not intended to limit the patent scope of the present disclosure. All equivalent structural transformations made using the contents of the present disclosure and the drawings under the inventive concept of the present disclosure, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present disclosure.

Claims

1. A foreign body detection method, characterized in that: For detection equipment, including: According to the meteorological conditions of the target detection area, a corresponding detection signal is sent to the target detection area, and a returned echo signal is received; the echo signal is a reflection signal corresponding to the detection signal generated based on the foreign matter in the target detection area; A foreign object detection result of the target detection area is determined according to the echo signal, wherein the foreign object detection result is used to characterize the presence of foreign objects in the target detection area.

2. The method according to claim 1, characterized in that The method of sending a corresponding detection signal to the target detection area according to the meteorological conditions of the target detection area and receiving a returned echo signal includes: Determine whether the meteorological conditions in the target detection area meet the preset meteorological conditions, wherein the preset meteorological conditions include meteorological conditions corresponding to rainy and foggy weather; When the meteorological conditions of the target detection area meet the preset meteorological conditions, a circular polarization signal is sent to the target detection area, and a circular polarization echo signal returned by the target detection area is received.

3. The method according to claim 2, characterized in that The circularly polarized signal is a left-hand circularly polarized signal; When there is a foreign object in the target detection area, the circularly polarized echo signal is a right-hand circularly polarized echo signal; When there is no foreign object in the target detection area, the circularly polarized echo signal is a left-handed circularly polarized echo signal.

4. The method according to claim 1, characterized in that: The method of sending a corresponding detection signal to the target detection area according to the meteorological conditions of the target detection area and receiving a returned echo signal also includes: When the meteorological conditions in the target detection area do not meet the preset meteorological conditions, a vertical polarization signal is sent to the target detection area, and a vertical polarization echo signal returned by the target detection area is received.

5. The method according to claim 1, characterized in that Also includes: Determine whether there is a foreign object in the target detection area according to the foreign object detection result; When determining whether there is a foreign object in the target detection area, calculation is performed according to the foreign object detection result to determine the position information of the foreign object in the target detection area.

6. The method according to claim 5, characterized in that Calculating according to the foreign object detection result to determine the location information of the foreign object in the target detection area includes: Determine the horizontal signal component and the vertical signal component of the circularly polarized echo signal according to the foreign object detection result; Based on the horizontal signal component and the vertical signal component, determining a difference frequency signal between the circular polarization signal and the circular polarization echo signal, and determining a signal parameter of the difference frequency signal; Calculation is performed based on the signal parameters of the difference frequency signal to determine the position information of the foreign object.

7. The method according to claim 2, characterized in that The step of calculating according to the signal parameters of the difference frequency signal to determine the position information of the foreign object includes: Calculate according to the signal parameters of the difference frequency signal to determine the distance information of the foreign object; Determining the location information of the foreign object based on the distance information of the foreign object; The distance information of the foreign object satisfies the following relationship: Where D represents the distance between the detection device corresponding to the transmitting antenna and the foreign object, c represents the propagation speed of the electromagnetic wave corresponding to the circularly polarized signal and the circularly polarized echo signal in the air, T represents the frequency modulation period, B represents the bandwidth of the detection device, and f s Indicates the frequency of the difference frequency signal.

8. A foreign body detection device, characterized in that: include: A signal transceiver module is used to send a corresponding detection signal to the target detection area according to the meteorological conditions of the target detection area, and receive a returned echo signal; The echo signal is a reflection signal corresponding to the detection signal generated based on the foreign matter in the target detection area; A determination module is used to determine a foreign object detection result of the target detection area according to the echo signal, wherein the foreign object detection result is used to characterize the presence of foreign objects in the target detection area.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the processor executes the computer program to implement the method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: The electronic device comprises a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method according to any one of claims 1 to 7.

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