CN109444873A - A kind of velocity radar - Google Patents
A kind of velocity radar Download PDFInfo
- Publication number
- CN109444873A CN109444873A CN201811399953.4A CN201811399953A CN109444873A CN 109444873 A CN109444873 A CN 109444873A CN 201811399953 A CN201811399953 A CN 201811399953A CN 109444873 A CN109444873 A CN 109444873A
- Authority
- CN
- China
- Prior art keywords
- signal
- surrounding material
- radar
- module
- digital
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a kind of velocity radars, the velocity radar includes radar micro-wave module, signal processing module and data outputting module, the velocity information of measured target is converted into Doppler frequency signal by radar micro-wave module, and Doppler frequency signal is output to signal processing module, signal processing module carries out digital processing to Doppler frequency signal, the surrounding material density percent ratio of Doppler frequency signal after obtaining digital processing, and according to surrounding material density percent than the surrounding material point signal in the Doppler frequency signal after identification digital processing, and the corresponding frequency spectrum of surrounding material point signal in the Doppler frequency signal after digital processing is reset, and the Doppler frequency signal after removal surrounding material point signal is converted into velocity information and is output to data outputting module.The present invention can identify strong weather environment interference signal and filter out the strong weather environment interference signal, improve the stability and reliability that velocity radar works in the presence of a harsh environment.
Description
Technical field
The present invention relates to velocity radar fields, and in particular to a kind of velocity radar.
Background technique
With the high speed development of domestic intelligent transportation industry, velocity radar be widely used in testing the speed gate management, hypervelocity is grabbed
In the traffic intelligents managing and control system such as shooting system and mobile electronic policeman, and the core for being increasingly becoming Intelligent traffic management systems passes
Sensor.
The validity and stability of velocity radar are its final indexs.Microwave Velocity radar currently on the market is general
Good performance indicator is suffered under environment, but under some adverse circumstances, such as rain, snow, hail environment and have feature similar
Environment electromagnetics interference strong weather condition under, the job stability and reliability of velocity radar then substantially reduce, cause to judge by accident,
Many unnecessary troubles are caused to driver and traffic management department.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of velocity radars, identify strong weather environment interference to realize
Signal simultaneously filters out the strong weather environment interference signal.
In order to achieve the above object, the technical scheme of the present invention is realized as follows:
The present invention provides a kind of velocity radars, including radar micro-wave module, signal processing module and data outputting module；
It is characterized in that, the radar micro-wave module is used to for the speed signal of measured target being converted into Doppler frequency signal, and will
The Doppler frequency signal is output to the signal processing module；The signal processing module and the radar micro-wave module connect
It connects, the Doppler frequency signal for exporting to the radar micro-wave module carries out digital processing, more after obtaining digital processing
The general surrounding material density percent ratio for strangling frequency signal, wherein surrounding material density percent for the radar after digital processing than returning
Range value is greater than the occupation rate of the frequency point of predetermined amplitude value in wave signal, and according to the surrounding material density percent than identification number
Surrounding material point signal in Doppler frequency signal after word processing, and by the Doppler frequency signal middle ring after digital processing
Substance point signal corresponding frequency spectrum in border is reset, and the Doppler frequency signal after removal surrounding material point signal is converted into speed
Information is output to the data outputting module；The data outputting module is connect with the signal processing module, for receiving
State the velocity information of signal processing module output.
Preferably, signal processing module includes low-pass filter, analog-digital converter and Digital Signal Processing DSP core
Piece；Wherein, the low-pass filter is connect with the radar micro-wave module, how general for exporting to the radar micro-wave module
It strangles frequency signal and carries out low-pass filtering, to filter out the high-frequency signal in the Doppler frequency signal；The Analog-digital Converter
Device is connect with the low-pass filter, is converted into the number letter for will pass through the analog signal that low-pass filter filters
Number processing dsp chip needed for digital signal；The Digital Signal Processing dsp chip is connect with the analog-digital converter,
For obtaining the surrounding material density percent ratio of the digital signal after the analog-digital converter is converted, and according to the environment
Material density percentage identifies the surrounding material point signal in the digital signal after analog-digital converter conversion, and by institute
The corresponding frequency spectrum of surrounding material point signal is reset in digital signal after stating analog-digital converter conversion, and will be by removing division ring
Doppler frequency signal after the substance point signal of border is converted into velocity information.
Preferably, Digital Signal Processing dsp chip includes denoising unit, interference signal recognition unit, interference signal removing
Unit and speed output unit；Wherein, denoising unit is connect with the analog-digital converter, for filtering Doppler's frequency
High-frequency noise in rate signal；Interference signal recognition unit is connect with the denoising unit, for obtaining the number letter after denoising
Number data frame；The total data frame that will acquire judges whether the frame number in data processing region accumulates as data processing region
Default frame number is tired out, if so, choosing the scanning window of corresponding surrounding material point feature, and using the scanning window to data processing
The radar echo signal to be processed in region is scanned, by the data processing region scanned in predeterminated frequency range
The range value of interior each frequency point carries out binary conversion treatment, obtains surrounding material density percent ratio, root according to binary conversion treatment result
According to the surrounding material density percent than the surrounding material point signal in identification data processing region, and record the surrounding material
The frequency point of point signal；If it is not, then obtaining the new data frame of the radar echo signal to be processed, return continues to judge at data
Whether the frame number in reason region runs up to default frame number；The interference signal clearing cell and the interference signal recognition unit connect
It connects, the corresponding frequency spectrum of the surrounding material point signal for identifying the interference signal recognition unit is reset；The speed is defeated
Unit is connect with the interference signal clearing cell out, is turned for that will remove the Doppler frequency signal after surrounding material point signal
It changes velocity information into, and the velocity information is output to the data outputting module.
Preferably, velocity radar further includes power module, is connect with the modules of the velocity radar, external 12V's
Voltage is powered for external voltage to be converted into voltage needed for modules for modules.
Preferably, velocity radar further includes monitoring chip, is connect with the Digital Signal Processing dsp chip, for monitoring
The working condition of the Digital Signal Processing dsp chip.
Preferably, radar micro-wave module is made of array antenna and transmitting-receiving microstrip circuit.
Detailed description of the invention
Fig. 1 is the structure chart of velocity radar provided in an embodiment of the present invention；
Fig. 2 is the frequency spectrum three-dimensional figure of Doppler frequency signal provided in an embodiment of the present invention；
Fig. 3 is the frequency spectrum three-dimensional figure after Doppler frequency signal binary conversion treatment provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 is the structure chart of velocity radar provided in an embodiment of the present invention, and the Microwave Velocity radar includes radar microwave
Module 101, signal processing module 102 and data outputting module 103.
Wherein, the radar micro-wave module 101 is used to the velocity information of measured target being converted into Doppler frequency signal,
And the Doppler frequency signal is output to the signal processing module.
In the present embodiment, the working principle of radar micro-wave module is: radar issues the microwave signal of fixed frequency, then connects
Receive reflected microwave signal.If occurring mobile object in radar emission wave beam has radial velocity relative to radar, send out
The microwave signal of the microwave signal and reflection penetrated will appear difference on the frequency, referred to as Doppler frequency shift.This frequency displacement and mobile object
Speed has corresponding relationship, and object speed can directly be calculated.
The signal processing module 102 is connect with the radar micro-wave module 101, for defeated to the radar micro-wave module
Doppler frequency signal out carries out digital processing, the surrounding material density hundred of the Doppler frequency signal after obtaining digital processing
Divide ratio, and according to the surrounding material density percent than the surrounding material point in the Doppler frequency signal after identification digital processing
Signal, and the corresponding frequency spectrum of surrounding material point signal in the Doppler frequency signal after digital processing is reset, and division ring will be removed
Doppler frequency signal after the substance point signal of border is converted into velocity information and is output to the data outputting module.
In the present embodiment, digital processing is carried out to Doppler frequency signal using the method for low-pass filtering, it is more to filter out
High-frequency noise in general Le frequency signal.Binary conversion treatment is carried out to the Doppler frequency signal after digital processing and utilizes window
Function scanning, the surrounding material density percent ratio of the Doppler frequency signal after obtaining digital processing, and it is close according to surrounding material
The surrounding material point signal in Doppler frequency signal after spending percentage identification digital processing.Wherein, surrounding material density hundred
Divide than the occupation rate for the frequency point greater than predetermined amplitude value.
In the present embodiment, the case where fluctuating for amplitude complexity, can take simple classification processing.Higher than a certain width
Degree is one kind, is another kind of lower than this amplitude.In this case, it is equivalent to and converts continuous amplitude to two discrete classes, letter
Claim " binary conversion treatment ".1 representative can be used higher than predetermined amplitude value, 0 representative can be used lower than predetermined amplitude value.
The data outputting module 103 is connect with the signal processing module 102, for receiving the signal processing module
The velocity information of output.
The velocity information of measured target is converted into Doppler's frequency by radar micro-wave module by the technical solution of the present embodiment
The Doppler frequency signal is simultaneously output to the signal processing module by rate signal, and the signal processing module is to described how general
It strangles frequency signal and carries out digital processing, binary conversion treatment and window function scanning, identify strong weather environment interference signal and filter out this
Strong weather environment interference signal, and the Doppler frequency signal after removal surrounding material point signal is converted into velocity information output
To the data outputting module, the stability and reliability that Microwave Velocity radar works in the presence of a harsh environment are improved.
Based on the above technical solution, the signal processing module 102 includes low-pass filter 1021, simulation numeral
Converter 1022 and Digital Signal Processing (DSP) chip 1023；
Wherein, the low-pass filter 1021 is connect with the radar micro-wave module, for the radar micro-wave module
The Doppler frequency signal of output carries out low-pass filtering, to filter out the high-frequency signal in the Doppler frequency signal.
In the present embodiment, the Doppler frequency of radar processing is the signal within 20KHz, passes through low-pass filter 1021
High-frequency signal greater than 20KHz is filtered out.
The analog-digital converter 1022 is connect with the low-pass filter 1021, for that will filter by low-pass filter
Digital signal needed for the analog signal that wave obtains is converted into the Digital Signal Processing (DSP) chip.
In the present embodiment, the accessible number of dsp chip is converted analog signals into using A/D analog-digital converter to believe
Number.
Digital Signal Processing (DSP) chip 1023 is connect with the analog-digital converter 1022, for obtaining
The surrounding material density percent ratio of digital signal after stating analog-digital converter conversion, and according to the surrounding material density hundred
Point than identifying the surrounding material point signal in the digital signal after the analog-digital converter is converted, and by the simulation numeral
The corresponding frequency spectrum of surrounding material point signal is reset in digital signal after converter conversion, and will be by removal surrounding material point letter
Doppler frequency signal after number is converted into velocity information.
In the present embodiment, the data of the digital signal after on a frame-by-frame basis obtaining the analog-digital converter conversion
Frame, judges whether the frame number of the data frame got reaches default frame number, when the frame number of the data frame got reaches default frame
When number, using each data frame at this time as data processing region, and binary conversion treatment and window function are carried out to data processing region
Scanning.Digital signal feature is converted using binary processing method, counts density level to determine whether strong weather
Situation.Occupation rate in statistics scanning window greater than the frequency point of predetermined amplitude value is surrounding material density percent ratio, wherein described
Occupation rate is the number of the frequency point greater than predetermined amplitude value and the ratio of all frequency points.When surrounding material density percent is than big
When certain value, such as 50%, then it is determined as surrounding material point signal, and record the frequency point of surrounding material point signal, can incites somebody to action
The corresponding frequency spectrum of surrounding material point signal, which is reset, carrys out filtering environmental substance point interference signal.
In the present embodiment, the condition for scanning window has: (1) scanning the width a of window；(2) the length b of window is scanned；(3) it scans
Frequency point ranges f1~f2；(4) mode scanned is to carry out transversal scanning, longitudinal to update.The length b for scanning window is default frame number,
Can be 300 frames, 400 frames or more multiframe, the width a for scanning window can be 10*38Hz, scanning frequency point ranges be 6*38Hz~
55*38Hz.Namely in radar each interrupt cycle, by a*b scanning window within the scope of the transversal scanning of each cycle, it is with step-length
1 mode carries out transversal scanning.Then data update is carried out at the beginning of equal next cycles, one group of earliest data is moved
Out, one group of new data move into.Then it is scanned again.Method provided in an embodiment of the present invention is in each speed update cycle
It will undergo, that is, be real-time for the monitoring of strong weather interference signal.
Based on the above technical solution, the Digital Signal Processing dsp chip 1023 includes denoising unit, interference letter
Number recognition unit, interference signal clearing cell and speed output unit；
Wherein, denoising unit is connect with the analog-digital converter, for carrying out at number to Doppler frequency signal
Reason, filters high-frequency noise interference signal；Interference signal recognition unit is connect with the denoising unit for obtaining the number after denoising
The data frame of word signal；The total data frame that will acquire judges that the frame number in data processing region is as data processing region
It is no to run up to default frame number, if so, choosing the scanning window of corresponding surrounding material point feature, and using the scanning window to data
The radar echo signal to be processed in processing region is scanned；By in the data processing region scanned in predeterminated frequency
The range value of each frequency point in range carries out binary conversion treatment, obtains surrounding material density percent according to binary conversion treatment result
Than；According to the surrounding material density percent than the surrounding material point signal in identification data processing region, and record the ring
The frequency point of border substance point signal；If it is not, then obtaining the new data frame of the radar echo signal to be processed, return continues to judge
Whether the frame number in data processing region runs up to default frame number；The interference signal clearing cell and interference signal identification are single
Member connection, for the corresponding frequency spectrum of surrounding material point signal in the digital signal after analog-digital converter conversion is clear
Zero；Speed output unit is connect with the interference signal clearing cell, for that will remove the Doppler after surrounding material point signal
Frequency signal is converted into velocity information, and the velocity information is output to the data outputting module.
In the present embodiment, Doppler frequency signal is filtered using the method for adaptive weighted filter, is filtered more
High-frequency noise in general Le frequency signal.
In the present embodiment, judge whether the frame number in data processing region reaches default frame number；If so, choosing corresponding ring
The scanning window of border substance point feature, and using the scanning window to the radar echo signal to be processed in data processing region
It is scanned.When the frame number of the data frame got runs up to default frame number, using each data frame at this time as data processing
Region, and binary conversion treatment and window function scanning are carried out to data processing region.By in the data processing region scanned pre-
If the range value of each frequency point in frequency range carries out binary conversion treatment, surrounding material density is obtained according to binary conversion treatment result
Percentage.Radar echo signal feature is converted using binary processing method, counts density level to determine whether
Strong weather condition.Occupation rate in statistics scanning window greater than the frequency point of predetermined amplitude value is surrounding material density percent ratio,
Described in occupation rate be greater than predetermined amplitude value frequency point number and all frequency points ratio.According to the surrounding material
Density percent records the frequency point of the surrounding material point signal than the surrounding material point signal in identification data processing region.
When surrounding material density percent is than being greater than certain value, such as 50%, then it is determined as surrounding material point signal, and record environment
The corresponding frequency spectrum of surrounding material point signal can be reset and carry out filtering environmental substance point interference signal by the frequency point of substance point signal；If
It is no, then the new data frame of the radar echo signal to be processed is obtained, return continues to judge that the frame number in data processing region is
It is no to reach default frame number.
In the present embodiment, by taking heavy rain weather as an example: frequency spectrum three-dimensional figure such as Fig. 2 institute of rain signal, vehicle signal and noise
Show, the coordinate of three axis respectively represents: horizontal axis is Frequency point, and the longitudinal axis is the frame sequence of data, and vertical pivot is signal amplitude.Analysis three
Dimension figure: can be seen that there are two paddy peaks from the amplitude of overall waveform, at frame sequence 100~150 and 200~250, dotted line mark
For motor vehicle, two cars are respectively represented.Abscissa is 1 or 2, and ordinate continues entire 400 frame, and ordinate amplitude is 5
It is fluctuated between~6.This represents low-frequency noise.Abscissa 20~40, ordinate continue 400 frames, ordinate amplitude 5~
It is fluctuated between 6.This represents rain signal.The rest part that signal described above is removed in Fig. 2, is average noise, amplitude is 4
Left and right is lower.The persistent state of one fixed width is presented in frequency spectrum, and amplitude is between general noise and the motor vehicle of most strong amplitude.It will
Frequency spectrum has carried out after binary conversion treatment, it is possible to just be highlighted by the signal that radar captures, as shown in Figure 3.According to
Amplitude coordinate, it is known that being higher than the point of predetermined amplitude value, expression is motor vehicle and rain signal.It selects one and represents rain feature
Rectangular scanning window lock the signal of rain, can directly capture rainy signal in this way and distinguish signals of vehicles.Work as scanning
When window entangles rain signal and vehicle signal respectively, the occupation rate of the frequency point of predetermined amplitude value is met in statistics scanning window i.e.
For surrounding material density percent ratio.When occupation rate reaches certain percentage, such as 50%, so that it may it is determined as rainy condition,
If less than percentage is limited, it is possible to the case where being exactly motor vehicle or the case where for noise.
Based on the above technical solution, the velocity radar further includes power module 104, with the velocity radar
Modules connection, the voltage of external 12V are modules for external voltage to be converted into voltage needed for modules
Power supply.
Based on the above technical solution, the velocity radar further includes at monitoring chip 105, with the digital signal
Dsp chip connection is managed, for monitoring the working condition of the Digital Signal Processing dsp chip.
Based on the above technical solution, the radar micro-wave module is made of array antenna and transmitting-receiving microstrip circuit.
Velocity radar provided in an embodiment of the present invention can the interference of simple and quick identification distinctive signal, can be according to different situations spirit
Adjustment parameter living, has stronger portability, the environmental suitability the strong more will drive the producer using velocity radar in intelligence
Development in energy transportation industry, while also, technicalization intelligent to urban transportation construction plays the role of promotion.Originally test the speed thunder
Up to that can carry out the integrated use of whole auxiliary plan at radar scene, statistics is used as a result, improving the ring of intelligent transportation industry
Border adaptability.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (6)
1. a kind of velocity radar, including radar micro-wave module, signal processing module and data outputting module；It is characterized in that, institute
Radar micro-wave module is stated for the speed signal of measured target to be converted into Doppler frequency signal, and by the Doppler frequency
Signal is output to the signal processing module；The signal processing module is connect with the radar micro-wave module, for described
The Doppler frequency signal of radar micro-wave module output carries out digital processing, the Doppler frequency signal after obtaining digital processing
Surrounding material density percent ratio, wherein surrounding material density percent is than for range value in the radar echo signal after digital processing
Greater than the occupation rate of the frequency point of predetermined amplitude value, and according to the surrounding material density percent than how general after identification digital processing
The surrounding material point signal in frequency signal is strangled, and by surrounding material point signal pair in the Doppler frequency signal after digital processing
The frequency spectrum answered is reset, and will remove the Doppler frequency signal after surrounding material point signal be converted into velocity information be output to it is described
Data outputting module；The data outputting module is connect with the signal processing module, for receiving the signal processing module
The velocity information of output.
2. a kind of velocity radar according to claim 1, which is characterized in that the signal processing module includes low-pass filtering
Device, analog-digital converter and Digital Signal Processing dsp chip；Wherein, the low-pass filter and the radar micro-wave module
Connection, the Doppler frequency signal for exporting to the radar micro-wave module carries out low-pass filtering, to filter out the Doppler
High-frequency signal in frequency signal；The analog-digital converter is connect with the low-pass filter, for that will pass through low pass filtered
Digital signal needed for the analog signal that wave device filters is converted into the Digital Signal Processing dsp chip；The number letter
Number processing dsp chip is connect with the analog-digital converter, for obtaining the number after the analog-digital converter is converted
The surrounding material density percent ratio of signal, and according to the surrounding material density percent than identifying that the analog-digital converter turns
Surrounding material point signal in digital signal after changing, and by the analog-digital converter conversion after digital signal in environment
The corresponding frequency spectrum of substance point signal is reset, and the Doppler frequency signal after removing surrounding material point signal is converted into speed
Spend information.
3. a kind of velocity radar according to claim 2, which is characterized in that the Digital Signal Processing dsp chip includes
Denoise unit, interference signal recognition unit, interference signal clearing cell and speed output unit；Wherein, denoising unit with it is described
Analog-digital converter connection, for filtering the high-frequency noise in the Doppler frequency signal；Interference signal recognition unit with
The denoising unit connection, for obtaining the data frame of the digital signal after denoising；The total data frame that will acquire is as number
According to processing region, judge whether the frame number in data processing region runs up to default frame number, if so, choosing corresponding surrounding material point
The scanning window of feature, and the radar echo signal to be processed in data processing region is swept using the scanning window
It retouches, the range value of each frequency point in the data processing region scanned within the preset frequency range is subjected to binary conversion treatment, root
Surrounding material density percent ratio is obtained according to binary conversion treatment result, according to the surrounding material density percent than identification data processing
Surrounding material point signal in region, and record the frequency point of the surrounding material point signal；If it is not, then obtaining the thunder to be processed
Up to the new data frame of echo-signal, return continues to judge whether the frame number in data processing region runs up to default frame number；It is described
Interference signal clearing cell is connect with the interference signal recognition unit, for identify the interference signal recognition unit
The corresponding frequency spectrum of surrounding material point signal is reset；The speed output unit is connect with the interference signal clearing cell, is used for
Doppler frequency signal after removal surrounding material point signal is converted into velocity information, and the velocity information is output to institute
State data outputting module.
4. a kind of velocity radar according to claim 2, which is characterized in that the velocity radar further includes power module,
It is connect with the modules of the velocity radar, the voltage of external 12V, for external voltage to be converted into needed for modules
Voltage is powered for modules.
5. a kind of velocity radar according to claim 2, which is characterized in that the velocity radar further includes monitoring chip,
It is connect with the Digital Signal Processing dsp chip, for monitoring the working condition of the Digital Signal Processing dsp chip.
6. a kind of velocity radar according to any one of claim 2-5, which is characterized in that the radar micro-wave module
It is made of array antenna and transmitting-receiving microstrip circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811399953.4A CN109444873A (en) | 2018-11-22 | 2018-11-22 | A kind of velocity radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811399953.4A CN109444873A (en) | 2018-11-22 | 2018-11-22 | A kind of velocity radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109444873A true CN109444873A (en) | 2019-03-08 |
Family
ID=65553643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811399953.4A Withdrawn CN109444873A (en) | 2018-11-22 | 2018-11-22 | A kind of velocity radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109444873A (en) |
-
2018
- 2018-11-22 CN CN201811399953.4A patent/CN109444873A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107167797B (en) | Digital railway hump speed measuring radar and anti-interference method thereof | |
| CN203759242U (en) | Microwave speed measurement radar | |
| CN101231341B (en) | Integration vehicle flowrate radar installations directly detecting and measuring speed | |
| CN202003029U (en) | W-wave band front-car anti-collision radar detection system | |
| CN111123212A (en) | Signal processing method of scene surveillance radar based on complex clutter background | |
| CN106291487A (en) | A kind of radar based on AGC voltage and echo data receives power and RCS method of estimation | |
| CN107783121B (en) | Unmanned automobile anti-collision radar system signal processing system and method based on combined waveform | |
| CN106908794A (en) | Method and apparatus for detecting target object | |
| Raj et al. | Improved and optimal DBSCAN for embedded applications using high-resolution automotive radar | |
| CN212872892U (en) | Vehicle-mounted cascade millimeter wave radar, detection system and rail vehicle | |
| CN109100697A (en) | A kind of target condensing method based on ground surveillance radar system | |
| CN107783132B (en) | Anti-collision millimeter wave radar system for automatic driving automobile and signal processing method | |
| US20240118385A1 (en) | Data processing method and apparatus, and radar sensor | |
| CN109444873A (en) | A kind of velocity radar | |
| CN104459679A (en) | Target medium-band high-resolution processing system of azimuth rotation scanning mechanism surveillance radar | |
| CN112162271A (en) | Vehicle type recognition method of microwave radar under multiple scenes | |
| CN103792518B (en) | A kind of Microwave Velocity radar environments disturbance ecology and suppressing method | |
| CN113820668B (en) | Strong interference suppression system and suppression method for millimeter wave frequency modulation continuous wave radar | |
| CN112162250B (en) | Radar shielding detection method and system based on full FOV limited recognition | |
| KR102380013B1 (en) | Rainfall intensity estimation device and method using vehicle radar | |
| CN116626594A (en) | Integrated circuit, radio device, terminal equipment, interference detection method and device | |
| CN113866750A (en) | Pedestrian target detection and tracking method based on millimeter wave radar | |
| CN114114237A (en) | Hump field double-lane vehicle speed measuring method | |
| CN112834994A (en) | Millimeter wave radar short-range detection signal detection system for smart car | |
| CN2867358Y (en) | Laser surveying dynamic range expanded device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190308 |