CN200965570Y - Ultra-high-frequency pier collision avoidance radar system - Google Patents
Ultra-high-frequency pier collision avoidance radar system Download PDFInfo
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- CN200965570Y CN200965570Y CN 200620099775 CN200620099775U CN200965570Y CN 200965570 Y CN200965570 Y CN 200965570Y CN 200620099775 CN200620099775 CN 200620099775 CN 200620099775 U CN200620099775 U CN 200620099775U CN 200965570 Y CN200965570 Y CN 200965570Y
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Abstract
The utility model discloses an ultra high frequency pier collision resistance radar system consisting of a sending and receiving antenna system, a receiving channel, a transmitting channel, a frequency source module, a synchronization control module, a data collecting and processing module and a microcomputer system. The utility model is the radar with high identifying rate for monitoring vessels on water surfaces, which adopts a low transmitting power and is unnecessary to apply for a special frequency band. The utility model has a working frequency band of 300 to 330MHz and a working bandwidth of 5MHz and adopts a Doppler radar with a linear frequency working system, a range resolution of 30m and a maximum detection range of 2,000m. The utility model realizes the function of the anti-collision of piers by a low-powered radar with an ultra high frequency electromagnetic wave of 300 to 3,000 MHz and a corresponding wavelength of between 1 m to 0.1m, possessing a strong ability to penetrate dense fog and rains. The monitoring radar can not only position and track the passing vessels in the monitored range, draw shipping paths of the vessels, but also send alarm signals to the vessels entering the guard area, thus efficiently avoiding accidents.
Description
Technical field
The utility model relates to a kind of low-power UHF Doppler radar technology; Specifically, be a kind of ship monitoring radar system that works in uhf band.
Background technology
Have many large-scale highways and railroad bridge on the Changjiang river and other rivers, its bridge pier often is positioned near the middle of the river or the navigation channel.Because passing ships are more, the situation of tortuous channel appears in addition, the accident of passing ships bump bridge pier might take place, inherently safe for bridge constitutes certain hidden danger like this, in the bridge process of construction,, then can cause irreparable damage especially if the bump accident takes place.For the generation of minimizing accident as much as possible, designing a kind of pier anticollision radar system is a kind of efficient ways.
Traditional pier anticollision method is to build anti-collision bridge pier in the upstream of bridge pier one side; it can protect the bridge bridge pier to avoid the bump of ship effectively; but its cost generally all reaches millions of units; pyroscan; equipment such as optical camera also can be used to make up anti-collision early warning system (based on the research of the pier anticollision early warning system of Flame Image Process, " naval electronic engineering " 2005.6).Can be ineffective under the low situation of dense fog and night visibility but these equipment occur at river surface, and be to need most the moment that it plays a role this moment.Therefore, must set up a kind of low cost, collision avoidance system that can all weather operations.
Wuhan University's wave propagation laboratory began to develop the OSMAR-S of portable radar system in 2005, this radar system is based on up-to-date software radio mentality of designing, has compact conformation, the characteristics that configurability is strong, this radar system can be finished the detection of the marine moving target in investigative range effectively, location and tracking.The hardware platform of OSMAR-S is an open design platform, can be configured to the hyper band radar system, finishes the crashproof monitoring system of bridge pier.
A utility model patent of Wuhan University " high-frequency ground wave radar numeral coherent receiver " (ZL:200420057632.3), this radar receiver adopts transmitting-receiving, and station, linear frequency modulation interrupt continuous wave, mixing bandpass sampling and digital signal processor and finish multichannel data processing altogether; Have stable performance, simple in structure, system linear degree and the good advantage of dynamic stability; But this radar system, the linear frequency modulation of employing interrupts the continuous wave system, and time linear frequency modulation work period is longer, be fit to do longer-distance naval target and survey, and its frequency of operation is 5～10MHz; And UHF Doppler radar by disposing the running parameter of radar, changes to the linear frequency modulation continuous wave system on the basis of this radar, has shortened the linear frequency modulation work period, has improved the frequency of operation of radar, is suitable for the anti-collision radar system requirement of hyper band.
Summary of the invention
The purpose of this utility model provides a kind of ultrahigh frequency pier anticollision radar system, fills up existing technological gap, designs a kind of low power transmissions, need not to apply for a kind of high resolving power water surface ship monitoring radar of special frequency range.
To achieve these goals, the technical scheme that the utility model adopted is as follows: a kind of ultrahigh frequency pier anticollision radar system, comprise the dual-mode antenna system, receiving cable, transmission channel, the frequency source module, synchronization control module, digital sampling and processing and microsystem, it is characterized in that: what the frequency source in the radar host computer produced transmits through interconnecting with cable between transmission channel amplification back and the emitting antenna, emitting antenna has adopted the Yagi antenna structure, and receiving antenna adopts the ternary array array antenna; The receiving cable of radar adopts a mixing structure, obtains intermediate-freuqncy signal after echoed signal and the relevant local oscillation signal mixing, and intermediate-freuqncy signal is 21.405MHz; Adopt the relevant sampling pulse of 60KHz that intermediate-freuqncy signal is sampled respectively, and the data after will sampling are sent to digital signal processing chip DSP, in DSP, finish the quadrature demodulation of if sampling signal and finish and separate distance and handle, and the result that will separate distance processing computing is sent to main control computer by usb bus, through after the accumulation in N linear frequency modulation cycle, finish all after dates of a coherent accumulation, main frame is finished the doppler information that the 2nd FFT computing obtains target to the data of accumulation; Frequency of operation 300～330MHz, bandwidth of operation are 5MHz, adopt the linear frequency modulation continuous wave system.
Aforesaid ultrahigh frequency pier anticollision radar system is characterized in that: the aerial array that transmits and receives of radar all is erected on the copper mesh structure, transmits and receives aerial array and arranges that up and down copper mesh is therebetween.
The utility model ultrahigh frequency pier anticollision radar system, emitting antenna is to the zone, navigation channel in river launching electromagnetic wave wave beam, radar receiving antenna receives the emission echo of ship, the aerial array that transmits and receives of radar all is erected on the copper mesh structure, this copper mesh can play the effect of fixed antenna battle array, and can accomplish effective isolation to dual-mode antenna again, this copper mesh is erected at more than the most surging water level in river, can flood antenna when avoiding rising; The emitting antenna and the receiving antenna of radar all are connected to transmitter and receiver with low loss cable, receiver is conciliate the echoed signal of receiving apart from after handling through coherent demodulation, the result who handles is sent on the main control computer by usb bus, finish multichannel data processing on computers, information such as the position of acquisition target and movement velocity.
The utlity model has following advantage and good effect:
1. utilize the characteristics that UHF Doppler radar can all weather operations, particularly weather conditions are more abominable, under the lower situation of river surface visibility, the crashproof supervising device of traditional video has often lost supervisory function bit, and UHF Doppler radar can be monitored the ship in the river course effectively and the tracking of motion state, and can finish the tracking of a plurality of targets simultaneously, and give a warning for the ship that enters warning region, avoid the generation of accident.
2. ultrahigh frequency pier anticollision radar has adopted the portable design of compact type, and the device that transmits and receives of radar easily is fixed on the bridge pier, sets up than being easier to.Radar host computer can be placed on the control center of bridge, is convenient to user's operation.
3. with respect to traditional crashproof snubber assembly, a UHF Doppler radar can be monitored for the ship around a plurality of bridge piers effectively, greatly reduces cost, therefore has broad application prospects.
Description of drawings
Fig. 1 is the system framework figure and the warning synoptic diagram of the embodiment of the invention.
Fig. 2 is the principle of work synoptic diagram of the system of the embodiment of the invention.
Fig. 3 is the signal processing flow figure of the embodiment of the invention.
Fig. 4 be the embodiment of the invention the UHF Doppler radar simulation objectives apart from spectrogram.
Fig. 5 is the speed spectrogram of the UHF Doppler radar simulation objectives of the embodiment of the invention.
Wherein:
The 1-launching antenna array; The 2-transmission channel; 3-transmits;
4-frequency source module; 5-frequency source trigger pip; The 6-synchronization control module;
7-synchro control parameter; The 8-USB bus; 9-frequency source parameter;
The 10-local oscillation signal; The 11-receiving antenna array; The 12-receiving cable;
The 13-digital sampling and processing; The 14-main control computer; The crashproof warning line of 15-.
16-ship 1 17-ship 2 18-river courses
19-launching antenna array 20-copper mesh 21-receiving antenna array
22-transmission cable 23-radar host computer 24-bridge pier
25-passage 1 echoed signal 26-passage 1 local oscillation signal 27-bandpass filtering modules block
28-sampling and distance handle 29-speed and angle is handled 30-first receiving cable
The 31-second receiving cable 32-the 3rd receiving cable
Embodiment
Describe in detail below in conjunction with drawings and Examples:
As shown in Figure 1; Transmitting of this radar system produced by frequency synthesizer, and this signal is delivered to launching antenna array after amplifying, and emitting antenna is towards zone, river course to be measured, transmit with the river in the effect of ship echo signal after produce reflection.Three receiving antenna unit receive the local oscillation signal mixing that reflection echo and frequency source produce and obtain three road relevant intermediate-freuqncy signals, after intermediate-freuqncy signal is sampled by No. three analog to digital converters, be sent in the data processing module, finish in data processing module and separate the distance processing, the data after the range information of acquisition target also will be handled are sent to main control computer by usb bus and finish speed and the angle information that further signal Processing XXX extracts target.
This radar system transmit and local oscillation signal produces by the DDS device, emission and local oscillation signal provide work clock by same signal source, and by same signal triggering work, guaranteed radar in property; Intermediate-freuqncy signal after target echo signal that receives and the relevant local oscillator mixing is 21.405MHz, is sent to through bandpass sampling and with the data that collect that the quadrature of finishing data in the digital signal processor decomposes and the fast Flourier computing obtains the range information of target; Because the UHF Doppler radar system is a coherent radar system, in order to guarantee its coherence, all timing control signals of radar produce by isochronous controller, and isochronous controller is realized by programmable logic array (FPGA) in native system.It is usb bus that native system adopts the data bus mode, USB finishes for the setting of the controlled variable of synchro control and frequency source and the echo data that radar is handled and is sent to main frame in this system, USB is as present popular bus mode, it is low to have design cost, transmission speed is fast, the characteristics that are simple and easy to realize.
As shown in Figure 2; The launching antenna array of this radar system and receiving antenna array all are erected on the copper mesh that is fixed on the bridge pier, and the effect that this copper mesh has a fixed antenna battle array can realize the isolation between emitting antenna and the receiving antenna again effectively.The emitting antenna of radar and the transmission channel in the radar host computer interconnect by low loss cable, and the receiving cable in receiving antenna and the radar host computer interconnects; Dotted line shown in the figure represents that actual cable length may be very long, can allow radar host computer be placed on like this and be convenient to the place that the staff operates.
As shown in Figure 3; The Radar Signal Processing flow process is divided into processes such as distance processing and velocity process, after radar host computer is received the echoed signal of target, carry out mixing through receiving cable and relevant local oscillation signal, obtain intermediate-freuqncy signal, and intermediate-freuqncy signal carried out bandpass sampling, and sampled signal carried out the range information that quadrature demodulation and fast Flourier computing obtain target, finish and separate the distance processing, obtain that a M orders apart from deal with data, finish coherent accumulation week after date, obtain the N frame apart from result, form the matrix of a M * N, then each row of matrix are done the FFT computing, thereby obtain the motion velocity information of target; Obtain the angle information of target simultaneously for the The data MUSIC method of each array element collection.And from having obtained the location to water surface ship target, monitoring. Passage 2,3 among the figure is consistent with the receiver module of passage 1, only uses block representation in the drawings.
Fig. 4 has provided the synoptic diagram of radar target range sensing, and Fig. 5 has provided the synoptic diagram of radar target speed detection; Designing requirement according to collision avoidance radar, ability to the range information of knowing target is the important performance characteristic of radar, and the movement velocity of target provides foundation for the pre-warning time of estimating radar, so has provided the synoptic diagram of two important performance characteristic among the present invention.Because the radar ERP of design is 1～5W, range resolution is 30 meters and can monitors the ship in about 2 kilometers; And the maximum detectable range of Radar Design is 10m/s; Provide the echo simulation of target among the figure, as shown in FIG.; The distance of the target of emulation is 600 meters, and the movement velocity of target is 3m/s; The movement velocity of steamer can be greater than 10m/s generally speaking, be operated in normal range of radar and so on, and radar has detection range far away relatively, can detect ship earlier and its motion state is followed the tracks of, provide more pre-warning time, so this radar can satisfy crashproof designing requirement and have serviceability preferably.
Core of the present utility model is to utilize the radar wave can be by the object characteristic of metal object emission particularly, after being installed in emitter emission electric wave on the bridge pier and the echo after the ship effect in the monitored area and being received device and receiving, finish the extraction of echo signal at radar host computer, obtain the position of target, information such as speed, and warn with loudspeaker for the ship that enters warning region, order it to change course, avoid the generation of accident, automatically open simultaneously optical monitor, ship is carried out the monitoring camera-shooting evidence obtaining, can improve steamer mental awareness consciousness effectively.This radameter has low cost, and detection range is far away, and pre-warning time is long, and the high advantage of reliability, has vast potential for future development.
Claims (2)
1, a kind of ultrahigh frequency pier anticollision radar system, comprise the dual-mode antenna system, receiving cable, transmission channel, frequency source module, synchronization control module, digital sampling and processing and microsystem, it is characterized in that: what the frequency source in the radar host computer produced transmits through interconnecting with cable between transmission channel amplification back and the emitting antenna, and emitting antenna has adopted the Yagi antenna structure, and receiving antenna adopts the ternary array array antenna; The receiving cable of radar adopts a mixing structure, obtains intermediate-freuqncy signal after echoed signal and the relevant local oscillation signal mixing, and intermediate-freuqncy signal is 21.405MHz; Adopt the relevant sampling pulse of 60KHz that intermediate-freuqncy signal is sampled respectively, and the data after will sampling are sent to digital signal processing chip DSP, in DSP, finish the quadrature demodulation of if sampling signal and finish and separate distance and handle, and the result that will separate distance processing computing is sent to main control computer by usb bus, through after the accumulation in N linear frequency modulation cycle, finish all after dates of a coherent accumulation, main frame is finished the doppler information that the 2nd FFT computing obtains target to the data of accumulation; Frequency of operation 300～330MHz, bandwidth of operation are 5MHz, adopt the linear frequency modulation continuous wave system.
2, ultrahigh frequency pier anticollision radar system as claimed in claim 1 is characterized in that: the aerial array that transmits and receives of radar all is erected on the copper mesh structure, transmits and receives aerial array and arranges that up and down copper mesh is therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620099775 CN200965570Y (en) | 2006-11-06 | 2006-11-06 | Ultra-high-frequency pier collision avoidance radar system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620099775 CN200965570Y (en) | 2006-11-06 | 2006-11-06 | Ultra-high-frequency pier collision avoidance radar system |
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| CN200965570Y true CN200965570Y (en) | 2007-10-24 |
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| CN 200620099775 Expired - Fee Related CN200965570Y (en) | 2006-11-06 | 2006-11-06 | Ultra-high-frequency pier collision avoidance radar system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986170A (en) * | 2010-10-25 | 2011-03-16 | 安徽中超信息系统有限公司 | Bridge collision prevention radar alarming management system |
| CN106245591A (en) * | 2016-07-28 | 2016-12-21 | 中山市聚云软件科技有限公司 | Bridge collision avoidance system |
| CN106971631A (en) * | 2017-04-19 | 2017-07-21 | 上海新海信通信息技术有限公司 | A kind of railroad bridge Anticollision Radar early warning system |
| CN109565116A (en) * | 2016-07-29 | 2019-04-02 | 3M创新有限公司 | Radar emission redirects band |
| CN109782244A (en) * | 2018-12-29 | 2019-05-21 | 西安交通大学 | Based on single goal triangular linear frequency modulated continuous wave radar signal processing method |
| CN110596654A (en) * | 2019-10-18 | 2019-12-20 | 富临精工先进传感器科技(成都)有限责任公司 | Data synchronous acquisition system based on millimeter wave radar |
| CN112114305A (en) * | 2020-08-17 | 2020-12-22 | 西安电子科技大学 | Non-contact river channel radar monitoring method, system, device and application |
-
2006
- 2006-11-06 CN CN 200620099775 patent/CN200965570Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986170A (en) * | 2010-10-25 | 2011-03-16 | 安徽中超信息系统有限公司 | Bridge collision prevention radar alarming management system |
| CN106245591A (en) * | 2016-07-28 | 2016-12-21 | 中山市聚云软件科技有限公司 | Bridge collision avoidance system |
| CN109565116A (en) * | 2016-07-29 | 2019-04-02 | 3M创新有限公司 | Radar emission redirects band |
| CN106971631A (en) * | 2017-04-19 | 2017-07-21 | 上海新海信通信息技术有限公司 | A kind of railroad bridge Anticollision Radar early warning system |
| CN109782244A (en) * | 2018-12-29 | 2019-05-21 | 西安交通大学 | Based on single goal triangular linear frequency modulated continuous wave radar signal processing method |
| CN110596654A (en) * | 2019-10-18 | 2019-12-20 | 富临精工先进传感器科技(成都)有限责任公司 | Data synchronous acquisition system based on millimeter wave radar |
| CN112114305A (en) * | 2020-08-17 | 2020-12-22 | 西安电子科技大学 | Non-contact river channel radar monitoring method, system, device and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071024 Termination date: 20091207 |