CN216310268U - Foreign matter detection system - Google Patents
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- CN216310268U CN216310268U CN202121483502.6U CN202121483502U CN216310268U CN 216310268 U CN216310268 U CN 216310268U CN 202121483502 U CN202121483502 U CN 202121483502U CN 216310268 U CN216310268 U CN 216310268U
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Abstract
The application discloses foreign matter detection system. The foreign matter detection system includes: the system comprises a plurality of radar detection points which are sequentially arranged at intervals, wherein each radar detection point comprises an MIMO radar, each MIMO radar comprises two groups of microstrip antenna arrays, and the microstrip antenna arrays are used for detecting foreign matters in a preset range in real time. The foreign matter detection system is simple in structure, capable of improving the instantaneous detection range through the MIMO radar, and high in angular resolution and high in detection signal to noise ratio.
Description
Technical Field
The application relates to the technical field of target detection, in particular to a foreign matter detection system.
Background
FOD (Foreign Object Debris, a general term for some Foreign Object, Debris, or Object that may damage an aircraft. Runway foreign objects directly affect the flight safety of the airplane.
At present, most of domestic airports still depend on a manual inspection mode. However, with the rapid increase of passenger throughput, goods and post throughput and landing times, the ground resources and air resources of domestic airports are increasingly in shortage, and particularly, the resources are not ready for demand at busy airports, so that the need of airport FOD real-time detection is urgent.
SUMMERY OF THE UTILITY MODEL
The application provides a foreign matter detection system to treat the environment that detects and carry out the foreign matter and detect, the foreign matter detection system simple structure of this application can improve instantaneous detection range, and has higher angular resolution and detection SNR.
In order to solve the technical problem, the application adopts a technical scheme that: there is provided a foreign matter detection system including: the system comprises a plurality of radar detection points which are sequentially arranged at intervals, wherein each radar detection point comprises an MIMO radar, each MIMO radar comprises two groups of microstrip antenna arrays, and the microstrip antenna arrays are used for detecting foreign matters in a preset range in real time.
Further, each group of microstrip antenna arrays is a 4-transmission and 4-reception microstrip antenna array.
Further, the angular resolution of the microstrip antenna array is 1-7 °.
Further, the two groups of microstrip antenna arrays comprise a first microstrip antenna array and a second microstrip antenna array, the coverage range of the first microstrip antenna array is 0-90 degrees, the coverage range of the second microstrip antenna array is 90-180 degrees, and the included angle between the first microstrip antenna array and the second microstrip antenna array is 0-180 degrees.
Furthermore, the radar detection point further comprises a signal processor, the signal processor is connected with the MIMO radar, and the signal processor acquires sampling data of the foreign object from the MIMO radar and processes the sampling data to obtain position information of the foreign object.
Further, the signal processor comprises a distance dimension Fourier transform module, a non-coherent accumulation module, a constant false alarm detection module, a distance interpolation module and an angle estimation module which are connected in sequence, and is used for outputting position information of the foreign matter.
Further, the position information of the foreign object includes a distance, an angle, and a number of the MIMO radar of the foreign object with respect to the MIMO radar.
Furthermore, the foreign matter detection system also comprises a terminal server, and the terminal server is connected with the plurality of radar detection points and exchanges data with the radar detection points.
Further, the terminal server is used for acquiring position information of the foreign object from the radar detection point and performing coordinate conversion on the position information to obtain coordinate information of the foreign object in a preset coordinate system.
Furthermore, the radar detection point further comprises a camera shooting assembly, wherein the camera shooting assembly is connected with the terminal server and used for detecting whether foreign matters corresponding to the coordinate information exist or not.
The beneficial effect of this application is: be different from the condition of correlation technique, the foreign matter detecting system of this application includes a plurality of radar check points that set up at the interval in proper order to detect the runway, every radar check point includes the MIMO radar, the MIMO radar includes two sets of microstrip antenna array, microstrip antenna array is used for carrying out the foreign matter in great range and detects, effectively improves instantaneous detection scope, and the foreign matter detecting system of this application can cancel servo structure, and then simplify the system structure, and have and reach higher angular resolution and detect SNR.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a block diagram of an embodiment of a foreign object detection system provided herein;
FIG. 2 is a schematic distribution diagram of radar detection points in the foreign object detection system according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of an embodiment of a microstrip antenna array in the radar detection point of FIG. 2;
fig. 4 is a schematic block diagram of an embodiment of a signal processor in the foreign object detection system provided in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
FOD detection systems are particularly important for airport security. For example, a plastic cloth strip is sucked into an engine to cause an air-parking, a small screw nail or a metal sheet or even a sharp stone can be pricked on a tire to cause a tire burst, and therefore FOD detection in an airport draws great attention to the industry. The primary FOD detection systems in foreign markets are the Tarsier system in the uk, the FODetect system in israel, the iferet system in singapore and the FOD Finder system in the us. The iFerret system of the Singapore uses a pure optical scheme, and other three systems mainly adopt millimeter wave radar detection and adopt a means of assisting video image recognition technology to detect FOD. In a system driving mode, the FODetect system adopts a sidelight type, the FOD Finder system adopts a vehicle-mounted type, and the Tarsier system adopts a tower type.
The application provides a foreign matter detecting system can be used for surveying the foreign matter of predetermineeing the within range in real time to improve the safety of environment. Foreign matter referred to herein includes, but is not limited to, stones, metal devices, tape, newspapers or leaves, and the like. The foreign object detection system of the present embodiment may be used for real-time detection of foreign objects such as a lane or an airport runway, and the application of the foreign object detection system to the airport runway will be described as an example.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an embodiment of a foreign object detection system provided in the present application, and fig. 2 is a schematic distribution diagram of radar detection points of the foreign object detection system in fig. 1. In this embodiment, the foreign matter detection system includes: a plurality of radar detection points 20 arranged in sequence at intervals, that is, N radar detection points 20 arranged in sequence at intervals in this embodiment, where N is greater than or equal to 1. Each radar detection point 20 comprises a MIMO radar and the N radar detection points 20 comprise N MIMO radars. Each MIMO radar comprises two groups of microstrip antenna arrays, and the microstrip antenna arrays are used for detecting foreign matters in a preset range.
Further, the MIMO (Multiple-Input Multiple-Output) radar is originally derived from the concept of MIMO communication, and has been gradually applied to the vehicle-mounted millimeter wave radar system in recent years, and the performance is better verified. The MIMO radar adopts a plurality of transmitting antennas and a plurality of receiving antennas, each transmitting antenna transmits coherent waveforms, and a receiving end carries out digital beam synthesis, thereby realizing the estimation of a target angle. The virtual aperture of the antenna can be effectively increased, so that higher angular resolution is obtained; and a super-resolution algorithm can be applied to the virtual array, so that the limitation of the physical size of the antenna on the angular resolution is broken through.
Different from the situation of the prior art, the foreign object detection system adopts the MIMO radar, namely a multi-transmitting and multi-receiving mode is adopted to replace a single-transmitting and single-receiving mode in the original system, so that on one hand, the angle of the foreign object can be estimated through digital beam synthesis, and further higher angle estimation precision is obtained; on the other hand, the higher angular resolution can be obtained by matching with a super-resolution algorithm. Moreover, the instantaneous detection range of the system can be improved by using the microstrip antenna array.
Further, the foreign object detection system proposed in the present application may be of a sidelight type. As shown in fig. 2, a plurality of radar detection points 20 may be provided at intervals on the airport runway. The foreign object detection system can be configured with N distributed radar detection points 20; the N distributed radar detection points 20 are connected with a foreign matter detection system terminal server through network cables or wireless relays so as to monitor the foreign matters on the airport runway in real time. For example, a radar detection point 20 may be set every 50 meters to about 60 meters on an airport runway. The mounting height of the MIMO radar sensor for each radar detection point 20 may be about twenty to thirty centimeters.
The black five-pointed star in fig. 2 represents a single radar detection point 20, i.e. a "sidelight". The semicircular broken line indicates the effective range of the MIMO radar provided at each radar detection point 20. In this embodiment, the effective range of the MIMO radar set at each radar detection point 20 may reach 45 meters. The radar detection points 20 are respectively erected on two sides of the runway, and the distance between the left and right adjacent radar detection points 20 on the same runway is set to be 60 meters. In this embodiment, a typical civil aviation runway is taken as an example, the width of the runway is 60 meters, the middle is high, the two sides are low, the length of the runway is 3600 meters, and 120 radar detection points 20 are configured on the whole runway in order to cover all areas of the runway without gaps. In other implementations, the placement of the radar detection points 20 may be selected based on the size of the airport runway and the effective range of the MIMO radar, not to mention here, as long as the airport runway can be effectively covered by the MIMO radar.
Further, as shown in fig. 3, the MIMO radar of each radar detection point 20 includes two sets of microstrip antenna arrays, specifically, the two sets of microstrip antenna arrays include a first microstrip antenna array 11 and a second microstrip antenna array 12. The first microstrip antenna array 11 and the second microstrip antenna array 12 are arranged at a preset included angle, wherein the preset included angle ranges from 0 ° to 180 °. In the embodiment shown in fig. 3, the extending direction of the airport runway is taken as the X axis, and the direction perpendicular to the extending direction of the airport runway is taken as the Y axis, to establish a coordinate system, in the coordinate system, the included angle between the first microstrip antenna array 11 and the second microstrip antenna array 12 is 135 °, the included angle between the normal direction of the first microstrip antenna array 11 and the X axis is 45 °, the included angle between the normal direction of the second microstrip antenna array 12 and the X axis is 135 °, so that the energy coverage range of the first microstrip antenna array 11 is 0 ° to 90 °, the energy coverage range of the second microstrip antenna array 12 is 90 ° to 180 °, and the synthetic beam coverage range of the two sets of microstrip antenna arrays is 0 ° to 180 °.
In the present application, the angular resolution of the microstrip antenna array ranges from 1 ° to 7 °. In this embodiment, each group of microstrip antenna arrays may use 4-transmit and 4-receive microstrip antenna arrays, that is, each group of microstrip antenna arrays uses 4 transmit antennas and 4 receive antennas. The antenna array can be equivalent to a 1-transmitting 16-receiving uniform linear array, and when a conventional digital beam forming algorithm is used, the angular resolution can reach 7 degrees; by matching with super-resolution algorithms such as CAPON or MUSIC, the angular resolution can be improved to be within 2 degrees.
Further, each radar detection point 20 further includes a signal processor (not shown), the signal processor is connected to the MIMO radar, and the signal processor acquires sampling data of the foreign object from the MIMO radar and processes the sampling data to obtain position information of the foreign object.
The position information of the foreign object may include a distance, an angle, and a number of the MIMO radar of the foreign object with respect to the MIMO radar. Specifically, the signal processor acquires ADC (Analog-to-Digital Converter) sampling data from a radio frequency front end module in the MIMO radar, and outputs distance and azimuth angle information of foreign matters relative to the MIMO radar and corresponding radar codes.
Further, as shown in fig. 4, the signal processor includes a distance dimension fourier transform module 41, a non-coherent accumulation module 42, a constant false alarm detection module 43, a distance interpolation module 44, and an angle estimation module 45, which are connected in sequence, and is configured to process the sampling data output by the MIMO radar and output position information of a foreign object. The signal processor acquires ADC (analog to digital converter) sampling data from the MIMO radar, and sequentially passes through the distance dimensional Fourier transform module, the non-coherent accumulation module, the constant false alarm detection module, the distance interpolation module and the angle estimation module to process the ADC sampling data, so that distance and azimuth angle information of foreign matters relative to the MIMO radar and corresponding radar codes are obtained.
The foreign matter detection system further comprises a terminal server, wherein the terminal server is connected with the plurality of radar detection points 20 and exchanges data with the plurality of radar detection points 20. Specifically, the terminal server is connected to the signal processor of each radar detection point 20, and performs data exchange with the signal processor.
Specifically, after calculating the position information of the foreign object, the signal processor sends the position information to the terminal server, and the terminal server acquires the position information of the foreign object and performs coordinate conversion on the position information of the foreign object to obtain coordinate information of the foreign object in a predetermined coordinate system. The predetermined coordinate system may be an airport runway coordinate system, or may be another artificially established coordinate system to locate the foreign object.
In this embodiment, the terminal server of the foreign object detection system receives the target distance and azimuth angle information sent from each radar detection point 20 and the corresponding radar ID number, and the terminal server performs coordinate conversion according to the radar ID number, and converts the target distance and azimuth angle information sent from each MIMO radar detection point 20 into an airport runway coordinate system to determine the coordinate position of the foreign object on the airport runway. Namely, the terminal server acquires the coordinate information of the foreign matter in the coordinate system of the airport runway.
Further, the radar detection point 20 further includes a camera (not shown) connected to the terminal server for detecting whether a foreign object exists. After the terminal server acquires the coordinate information of the foreign matter, the camera shooting assembly is started, the camera shooting assembly is used for shooting images, and whether the foreign matter corresponding to the coordinate information really exists or not is confirmed through the shot images.
In summary, the microstrip antenna array with a large coverage direction is adopted to replace a narrow beam antenna in the original system, so that the instantaneous detection range can be effectively improved. The application can cancel a servo structure, thereby simplifying the structural design of the foreign matter detection system; the radar adopts a multi-transmitting and multi-receiving mode to replace a single-transmitting and single-receiving mode in the original system, and the angle of the foreign object can be estimated through digital beam synthesis, so that higher angle estimation precision is obtained; and by matching with a super-resolution algorithm, higher angular resolution can be obtained. In addition, in the application, because the antenna does not rotate any more, the short-wave beam dwell time of the original system is different, and a higher detection signal-to-noise ratio can be obtained through longer time accumulation.
The above description is only for the purpose of illustrating embodiments of the present invention and is not intended to limit the scope of the present invention, and all modifications, equivalents, and equivalent structures or equivalent processes that can be used directly or indirectly in other related fields of technology shall be encompassed by the present invention.
Claims (10)
1. A foreign object detection system, characterized in that the foreign object detection system comprises:
the system comprises a plurality of radar detection points which are sequentially arranged at intervals, wherein each radar detection point comprises an MIMO radar, each MIMO radar comprises two groups of microstrip antenna arrays, and the microstrip antenna arrays are used for detecting foreign matters in a preset range in real time.
2. The foreign object detection system of claim 1 wherein each set of microstrip antenna arrays is a 4-transmit, 4-receive microstrip antenna array.
3. The foreign object detection system of claim 2 wherein the microstrip antenna array has an angular resolution of 1 ° -7 °.
4. The foreign object detection system of claim 1, wherein the two sets of microstrip antenna arrays include a first microstrip antenna array and a second microstrip antenna array, the first microstrip antenna array covers 0 ° -90 °, the second microstrip antenna array covers 90 ° -180 °, and an included angle between the first microstrip antenna array and the second microstrip antenna array is 0 ° -180 °.
5. The foreign object detection system according to any one of claims 1 to 4, wherein the radar detection point further comprises a signal processor, the signal processor is connected to the MIMO radar, and the signal processor acquires sampling data of the foreign object from the MIMO radar and processes the sampling data to obtain position information of the foreign object.
6. The foreign object detection system according to claim 5, wherein the signal processor includes a distance dimension Fourier transform module, a non-coherent accumulation module, a constant false alarm detection module, a distance interpolation module, and an angle estimation module, which are connected in sequence, for outputting the position information of the foreign object.
7. The foreign object detection system according to claim 5, wherein the position information of the foreign object includes a distance, an angle, and a number of the MIMO radar with respect to the MIMO radar.
8. The foreign object detection system according to claim 5, further comprising a terminal server that connects a plurality of the radar detection points and performs data exchange with the radar detection points.
9. The foreign object detection system according to claim 8, wherein the terminal server is configured to acquire position information of the foreign object from the radar detection point, and perform coordinate conversion on the position information to obtain coordinate information of the foreign object in a predetermined coordinate system.
10. The foreign object detection system according to claim 9, wherein the radar detection point further comprises a camera module, and the camera module is connected to the terminal server and configured to detect whether the foreign object corresponding to the coordinate information exists.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022130366A1 (en) | 2022-11-16 | 2024-05-16 | Rheinmetall Air Defence Ag | Method and monitoring system for monitoring a runway |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102022130366A1 (en) | 2022-11-16 | 2024-05-16 | Rheinmetall Air Defence Ag | Method and monitoring system for monitoring a runway |
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Assignee: Shenzhen Huaxun ark Photoelectric Technology Co.,Ltd. Assignor: SHENZHEN HUAXUN FANGZHOU MICROELECTRONIC SCIENCE & TECHNOLOGY Co.,Ltd.|Shenzhen Huaxun ark Intelligent Information Technology Co.,Ltd. Contract record no.: X2022980006714 Denomination of utility model: Foreign object detection system Granted publication date: 20220415 License type: Common License Record date: 20220530 |
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Effective date of registration: 20230719 Address after: 518000 107, building 37, chentian Industrial Zone, chentian community, Xixiang street, Bao'an District, Shenzhen, Guangdong Province Patentee after: Shenzhen Huaxun ark Intelligent Information Technology Co.,Ltd. Address before: 518000 East, 2nd floor, building 37, chentian Industrial Zone, Baotian 1st Road, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN HUAXUN FANGZHOU MICROELECTRONIC SCIENCE & TECHNOLOGY Co.,Ltd. Patentee before: Shenzhen Huaxun ark Intelligent Information Technology Co.,Ltd. |
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Effective date of registration: 20231228 Address after: Building 7-6, Industrial Control Cloud Creation Port, No. 58 Hongtu Avenue, Economic Development Zone, Xinjian District, Nanchang City, Jiangxi Province, 330000 Patentee after: Jiangxi Huaxun Fangzhou Intelligent Technology Co.,Ltd. Address before: 518000 107, building 37, chentian Industrial Zone, chentian community, Xixiang street, Bao'an District, Shenzhen, Guangdong Province Patentee before: Shenzhen Huaxun ark Intelligent Information Technology Co.,Ltd. |