CN203894409U - Doppler radar - Google Patents
Doppler radar Download PDFInfo
- Publication number
- CN203894409U CN203894409U CN201420138727.1U CN201420138727U CN203894409U CN 203894409 U CN203894409 U CN 203894409U CN 201420138727 U CN201420138727 U CN 201420138727U CN 203894409 U CN203894409 U CN 203894409U
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- antenna
- transmitter
- reprod
- receiver
- pulse
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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Abstract
The utility model discloses a Doppler radar. A modem is connected with a transmitter. A modem generates a modulation pulse under triggering of a trigger pulse. The transmitter receives the modulation pulse sent by the modem and generates radio frequency pulses of a vertical polarized wave and a horizontal polarized wave after amplification. An antenna change-over switch is connected with an antenna through a waveguide tube. The antenna change-over switch is connected with the transmitter and the receiver selectively. Under an emission work state, the transmitter is connected with the antenna change-over switch, the radio frequency pulses outputted by the transmitter arrive at the antenna through the antenna change-over switch and the waveguide tube. The antenna emits the radio frequency pulses out in a beam wave form and receives the back wave. Under a reception work state, in the radio frequency pulse emission intermission, the antenna change-over switch is connected with the receiver, and the back wave received by the antenna goes into the receiver through the waveguide tube and the antenna change-over switch. In the Doppler radar, the precipitation estimating precision of the radar is raised, the data reliability is high, and detection of mobile object data is convenient.
Description
Technical field
The utility model relates to Radar Technology field, relates in particular to a kind of radar Doppler.
Background technology
Weather radar is the situation of high speed development in recent decades, is subject to most countries in the world and comprises the great attention of International Meteorological Organization of meteorology, the hydrology and the related discipline of World Meteorological Organization (WMO).The particularly application of Doppler radar technology, can obtain more air motion status information, greatly improved various countries meteorology and hydrology department to the monitoring of extreme diastrous weather and prediction ability, become countries in the world and built first choice of business radar fence.
Conventional Digitized Weather Radar System utilization be the amplitude information of precipitation echo, utilize signal intensity to survey the situations such as the distribution of rain belt, rain belt intensity, vertical stratification.Simultaneously, utilize Doppler effect in physics to measure radially (towards radar or away from radar direction) movement velocity of precipitation particles, and by this velocity information infer that wind speed profile, uprush speed, atmospheric turbulence, precipitation particles distribute, the wind field structure feature in precipitation particularly in precipitation.
Yet existing weather radar is not high to the precision of quantity of precipitation estimation, the phase ability of identification precipitation particles is lower, cannot provide forecast more accurately to weather phenomena such as heavy rain, hail and large-area precipitations; Meanwhile, the equipment amount of radar is many, and reliability is not high, can not conveniently survey moving target data.
Utility model content
The technical matters proposing based on background technology, the utility model proposes a kind of radar Doppler, has improved radar high to precision, the data reliability of quantity of precipitation estimation, the convenient moving target data of surveying.
A kind of radar Doppler the utility model proposes, comprising: modulator-demodular unit, transmitter, reprod, waveguide, antenna, receiver and display;
Modulator-demodular unit is connected with transmitter, and modulator-demodular unit produces modulating pulse under the triggering of trigger pulse, and the modulating pulse that transmitter receiving modem sends produces the radio-frequency pulse of vertically polarized wave and horizontal polarized wave after amplifying; Reprod is connected with antenna by waveguide, and reprod is optionally connected with transmitter and receiver;
Under transmitting duty, transmitter is connected reprod, and the radio-frequency pulse of transmitter output arrives antenna by reprod and waveguide; Antenna is launched radio-frequency pulse receive echo with bundle waveshape; Receiving under duty, its intermittent phase in radio-frequency pulse transmitting, reprod is connected receiver, and the echo of antenna reception enters receiver by waveguide and reprod, and the echo that display is connected with receiver receiving shows after amplifying.
Preferably, the pulse width of modulator-demodular unit is 0.1-4 microsecond.
Preferably, waveguide is hollow rectangle tubular metal conductor, and it has V passage and H passage two-way.
Preferably, the elevation limits of antenna is 0.5-19.5 degree.
Preferably, display is plane position indicator (PPI) or range-height display.
In the utility model, adopt polarization technology not only to improve the precision of radar to quantity of precipitation estimation, also improved the phase ability of identification precipitation particles, the forecast more accurately that provides to weather phenomena such as heavy rain, hail and large-area precipitations, can provide radial velocity field; Meanwhile, the application of solid state transmitter, has not only reduced the equipment amount of radar, has greatly improved the reliability of radar simultaneously, and convenient mobile detection.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of radar Doppler of the utility model embodiment proposition.
Embodiment
As shown in Figure 1, Fig. 1 is the structural representation of a kind of radar Doppler of the utility model embodiment proposition.
With reference to Fig. 1, a kind of radar Doppler the utility model proposes, comprising: modulator-demodular unit 10, transmitter 20, reprod 30, waveguide 40, antenna 50, receiver 60 and display 70; Wherein:
Modulator-demodular unit 10 is connected with transmitter 20, and modulator-demodular unit 10 produces modulating pulse under the triggering of trigger pulse, and the modulating pulse that transmitter 20 receiving modems 10 send produces the radio-frequency pulse of vertically polarized wave and horizontal polarized wave after amplifying;
Reprod 30 is connected with antenna 50 by waveguide 40, and reprod 30 is optionally connected with transmitter 20 and receiver 60;
Under transmitting duty, transmitter 20 is connected reprod 30, and the radio-frequency pulse of transmitter 20 outputs arrives antenna 50 by reprod 30 and waveguide 40; Antenna 50 is launched radio-frequency pulse receive echo with bundle waveshape; Receiving under duty, its intermittent phase in radio-frequency pulse transmitting, reprod 30 is connected receiver 60, the echo that antenna 50 receives enters receiver 60 by waveguide 40 and reprod 30, and the echo that display 70 is connected with receiver 60 receiving shows after amplifying.
Modulator-demodular unit 10 for producing modulating pulse under the triggering of trigger pulse, the modulating pulse of modulator-demodular unit 10 has fixing pulse width, also referred to as the duration of pulse, take microsecond as unit, also can represent with the space length h of pulse, pulse width directly affects detection range and distance resolution is radar shadow size; The general close-target of surveying adopts narrow pulse width, when surveying target far away, adopts wide pulse width to increase echoed signal intensity, and for example, the pulse width of weather radar is generally got 0.1-4 microsecond, different and different with various radar detection objects; The video waveform of the modulating pulse of modulator-demodular unit 10 has enough amplitudes, to transmitter is normally worked.
Transmitter 20 is connected the modulating pulse sending for receiving modem 10 with modulator-demodular unit 10, for example, by amplifier (klystron amplifier or magnetron), amplify to produce the stable radio-frequency pulse of 10 centimetres of high power (peak power 750kw), each radio-frequency pulse has identical initial phase and can be extracted to guarantee the doppler information in echoed signal;
Reprod 30 is optionally connected with transmitter 20 and receiver 60, and reprod 30 is connected with antenna 50 by waveguide 40, and the radio-frequency pulse of transmitter 20 outputs is sent to antenna 50 by reprod 50 and waveguide 20.
When transmitter 20 is connected reprod 30, the radio-frequency pulse of transmitter 20 outputs arrives antenna 50 by reprod 30 and waveguide 40, and now reprod 30 cuts off and is communicated with receiver 60, and radio-frequency pulse can not enter receiver 60; Antenna 50 is launched radio-frequency pulse receive echo with bundle waveshape; In the intermittent phase of radio-frequency pulse transmitting, reprod 30 is connected receiver 60, and the echo that antenna 10 receives enters receiver 60 by waveguide 40 and reprod 30.
Waveguide 40 is hollow rectangle tubular metal conductor, it has V passage and H passage two-way, its internal diameter size is different with the wavelength of carried signal, the emissive power of radio-frequency pulse is divided into two-way constant amplitude cophase wave respectively along V passage and the H passage of waveguide 40, vertically polarized wave (V passage) and horizontal polarized wave (H passage) are launched by aerial radiation feed, and the loss that radiofrequency signal is sent to antenna 50 through waveguide 40 is very little.
Antenna 50 is launched for vertically polarized wave and horizontal polarized wave that transmitter 20 is produced, and radiofrequency signal is transmitted into the atmosphere energy (the back scattering energy of particle) that also acceptance is returned with the form of wave beam.The elevation limits of antenna 50 is from 0.5 degree to 19.5 degree.The setting of antenna elevation angle depends on that scan mode, the body of antenna sweep pattern VCP(volume coverage pattern) and mode of operation (being divided into two kinds of patterns of clear sky and precipitation).
Receiver 60, for receiving vertically polarized wave and the horizontal polarization echoed signal from object, is sent to display 70 and shows after amplifying.Because echoed signal is usually very faint, receiver 60 must have the ability that receives feeble signal, and this ability is called sensitivity, and sensitivity represents with minimum discernable power, is the echo power of echoed signal just can distinguish from noise signal time.The purposes of receiver 60 is that required echoed signal is separated from the noise that exists all the time and other undesired signals; Through amplifying, make its amplitude be enough in the display of cathode-ray tube (CRT) and so on, show or can automatically be processed by digital device again.
Display 70 can be plane position indicator (PPI) (being called for short flat aobvious or PPI), and on this display, electron beam is outwards done the radial scan of constant speed on the one hand from the center of screen with pulse repetition rate; On the other hand by antenna gearing, make radial scan for synchronously with sky wire-wound vertical axis revolving, when having echoed signal to enter, in corresponding distance and bearing upper tracer blast, thus the echoed signal of demonstrating, and the intensity of echoed signal is depended in its brightness, can adopt video integrator and processor, echoed signal is shown by different gray scales or colour by different intensity, when radar antenna run-down, on screen, demonstrate survey station around distribution and the echo strength of target.Display also can range-height display (being called for short high aobvious or RHI), is used for showing vertical section, and ordinate is height, and horizontal ordinate is horizontal range, and height coordinate is amplified, and shown echoed signal is elongated in the vertical direction.
In the utility model, adopt polarization technology not only to improve the precision of radar to quantity of precipitation estimation, also improved the phase ability of identification precipitation particles, the forecast more accurately that provides to weather phenomena such as heavy rain, hail and large-area precipitations, can provide radial velocity field; Meanwhile, the application of solid state transmitter, has not only reduced the equipment amount of radar, has greatly improved the reliability of radar simultaneously, and convenient mobile detection.
The above; it is only preferably embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; according to the technical solution of the utility model and utility model design thereof, be equal to replacement or changed, within all should being encompassed in protection domain of the present utility model.
Claims (5)
1. a radar Doppler, is characterized in that, comprising: modulator-demodular unit (10), transmitter (20), reprod (30), waveguide (40), antenna (50), receiver (60) and display (70);
Modulator-demodular unit (10) is connected with transmitter (20), modulator-demodular unit (10) produces modulating pulse under the triggering of trigger pulse, and the modulating pulse that transmitter (20) receiving modem (10) sends produces the radio-frequency pulse of vertically polarized wave and horizontal polarized wave after amplifying; Reprod (30) is connected with antenna (50) by waveguide (40), and reprod (30) is optionally connected with transmitter (20) and receiver (60);
Under transmitting duty, transmitter (20) is connected reprod (30), and the radio-frequency pulse of transmitter (20) output arrives antenna (50) by reprod (30) and waveguide (40); Antenna (50) is launched radio-frequency pulse receive echo with bundle waveshape; Receiving under duty, its intermittent phase in radio-frequency pulse transmitting, reprod (30) is connected receiver (60), the echo that antenna (50) receives enters receiver (60) by waveguide (40) and reprod (30), and the echo that display (70) is connected with receiver (60) receiving shows after amplifying.
2. radar Doppler according to claim 1, is characterized in that, the pulse width of modulator-demodular unit (10) is 0.1-4 microsecond.
3. radar Doppler according to claim 1, is characterized in that, waveguide (40) is hollow rectangle tubular metal conductor, and it has V passage and H passage two-way.
4. radar Doppler according to claim 1, is characterized in that, the elevation limits of antenna (50) is 0.5-19.5 degree.
5. radar Doppler according to claim 1, is characterized in that, display (70) is plane position indicator (PPI) or range-height display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420138727.1U CN203894409U (en) | 2014-03-25 | 2014-03-25 | Doppler radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420138727.1U CN203894409U (en) | 2014-03-25 | 2014-03-25 | Doppler radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203894409U true CN203894409U (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420138727.1U Expired - Fee Related CN203894409U (en) | 2014-03-25 | 2014-03-25 | Doppler radar |
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| Country | Link |
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| CN (1) | CN203894409U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093947A (en) * | 2016-08-23 | 2016-11-09 | 南京恩瑞特实业有限公司 | Ka wave band millimeter wave Continuous Wave with frequency modulation cloud detection radar |
| CN112596032A (en) * | 2020-11-27 | 2021-04-02 | 上海眼控科技股份有限公司 | Weather radar echo display method, device, equipment and storage medium |
-
2014
- 2014-03-25 CN CN201420138727.1U patent/CN203894409U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093947A (en) * | 2016-08-23 | 2016-11-09 | 南京恩瑞特实业有限公司 | Ka wave band millimeter wave Continuous Wave with frequency modulation cloud detection radar |
| CN112596032A (en) * | 2020-11-27 | 2021-04-02 | 上海眼控科技股份有限公司 | Weather radar echo display method, device, equipment and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20180325 |