CN203658578U - Anti-electromagnetic-interference radar tachymeter - Google Patents
Anti-electromagnetic-interference radar tachymeter Download PDFInfo
- Publication number
- CN203658578U CN203658578U CN201320778014.7U CN201320778014U CN203658578U CN 203658578 U CN203658578 U CN 203658578U CN 201320778014 U CN201320778014 U CN 201320778014U CN 203658578 U CN203658578 U CN 203658578U
- Authority
- CN
- China
- Prior art keywords
- pulse
- generator
- amplifier
- antenna
- gating circuit
- 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.)
- Expired - Fee Related
Links
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
The utility model discloses an anti-electromagnetic-interference radar tachymeter which comprises an emitter, a receiver and an antenna system. In the emitter, a trigger pulse generator is successively connected with a pulse modulator, an automatic generator and a power regulator, and a voltage stabilizer is connected with the trigger pulse generator, the pulse modulator and the automatic generator. In the receiver, a gating pulse former is connected with the trigger pulse generator and a gating circuit, the gating circuit is connected with an amplitude selector and a terminal amplifier, a data processing unit is connected with the amplitude selector and an angle selector, and the terminal amplifier is connected with a pre-amplifier, a wave detector and a high-frequency filter. In the antenna system, an emission antenna is connected with the power regulator, and a reception antenna is connected with the high-frequency filter. Pulse frequency of an emission signal is changed randomly to effectively filter interferential electromagnetic waves, thereby improving the measuring precision.
Description
Technical field
The utility model relates to a kind of knotmeter, and specifically a kind of radar meter of anti-electromagnetic interference (EMI), belongs to speed measuring device technical field.
Background technology
From Doppler effect principle, when the wave source vibrating is gradually when the observer, the frequency that the frequency ratio measuring is sent from wave source is high; In the time that wave source is left away, the frequency measuring is lower than the frequency of sending.Radar velocity measurement has mainly utilized Doppler effect principle: when target to radar antenna near time, reflected signal frequency will be higher than transmitter frequency; Otherwise in the time that target is gone away from antenna, reflected signal frequency will be lower than transmitting probability.So can, by the change numerical value of frequency, calculate the relative velocity of target and radar.At present, radar meter has been widely used in multiple fields such as communications and transportation, boats and ships, aviation.
Transmitting of existing radar meter is all fixing frequency, in some measurement environment, exist natural disturbance source and artificial interference source, as broadcast, communication, overhead transmission line and various radio-frequency apparatus etc., because the frequency transmitting is disturbed in electromagnetic frequency range in measurement environment, thereby easily cause measuring error.
Summary of the invention
The problem existing for above-mentioned prior art, the utility model provides a kind of radar meter of anti-electromagnetic interference (EMI), and the mode changing by transmit signal pulse frequency accidental can effectively be filtered interference electromagnetic wave, thereby improves measuring accuracy.
To achieve these goals, the technical solution adopted in the utility model is: the radar meter of this anti-electromagnetic interference (EMI), comprise emitter, receiving trap and antenna system,
Described emitter comprises voltage stabilizer, trigger generator, pulse-modulator, automatic generator and power governor, trigger generator is connected with pulse-modulator, automatic generator and power governor successively, and voltage stabilizer is connected with trigger generator, pulse-modulator and automatic generator respectively;
Described receiving trap comprises high frequency filter, wave detector, amplifier, terminal amplifier, strobe pulse shaper, gating circuit, range selector, angle acquisition device and data processing unit in advance, strobe pulse shaper is connected with trigger generator and gating circuit respectively, gating circuit is connected with range selector and terminal amplifier respectively, data processing unit is connected with range selector and angle Selection device respectively, and amplifier, wave detector and high frequency filter are connected terminal amplifier successively with in advance;
Described antenna system comprises emitting antenna and receiving antenna, and emitting antenna is connected with power governor, and receiving antenna is connected with high frequency filter.
Compared with prior art, owing to disturbing electromagnetic frequency and the amplitude all can be in certain scope in measurement environment, the utility model sends by trigger generator the mode that transmit signal pulse frequency accidental changes, make to transmit in disturbing electromagnetic frequency range, have not in disturbing electromagnetic frequency range; Signal receive after through High frequency filter, detection, be amplified into gating circuit, gating circuit basis is filtered undesired signal with the strobe pulse that radiation signal pulsed frequency matches, in process range selector filtering amplitude and the unmatched undesired signal that transmits, process reaches anti-electromagnetic interference (EMI) object thus, thereby has improved measuring accuracy.
Brief description of the drawings
Fig. 1 is electrical schematic diagram of the present utility model;
Fig. 2 is signal waveforms of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As depicted in figs. 1 and 2, the utility model comprises emitter, receiving trap and antenna system,
Described emitter comprises voltage stabilizer, trigger generator, pulse-modulator, automatic generator and power governor, trigger generator is connected with pulse-modulator, automatic generator and power governor successively, and voltage stabilizer is connected with trigger generator, pulse-modulator and automatic generator respectively;
Described receiving trap comprises high frequency filter, wave detector, amplifier, terminal amplifier, strobe pulse shaper, gating circuit, range selector, angle acquisition device and data processing unit in advance, strobe pulse shaper is connected with trigger generator and gating circuit respectively, gating circuit is connected with range selector and terminal amplifier respectively, data processing unit is connected with range selector and angle Selection device respectively, and amplifier, wave detector and high frequency filter are connected terminal amplifier successively with in advance;
Described antenna system comprises emitting antenna and receiving antenna, and emitting antenna is connected with power governor, and receiving antenna is connected with high frequency filter.
The course of work: first the trigger pulse device in emitter starts, produce the amplitude range of setting, the pulse that width is equal, the frequency accidental of this pulse simultaneously changes, pulse is input to pulse-modulator, carry out pulsed modulation, make automatic generator produce high-frequency signal, be adjusted to applicable power through power governor again, by emitting antenna by high-frequency electromagnetic wave direction spatial emission, owing to disturbing electromagnetic frequency and the amplitude all can be in certain scope in fixing environment, so random emission signal frequency that the utility model sends, some meetings are in disturbing electromagnetic frequency range, some meetings are not being disturbed electromagnetic frequency range,
When electromagnetic wave that target reflects is after receiving antenna receives, first enter high frequency filter filtering clutter, outputting video signal pulse after wave detector detection, video signal pulse enter in advance amplifier, terminal amplifier laggard enter gating circuit, get rid of and disturb by gating circuit; The pulse signal that trigger pulse device in emitter produces also inputs to strobe pulse shaper, and forming strobe pulse on the pulse signal basis producing at trigger pulse device, the time width t of strobe pulse encounters according to transmitting the time (electromagnetic wave two-way time) firing back after target to determine.Strobe pulse and echoed signal input to gating circuit and judge, if input echoed signal in the time of strobe pulse effect t, just think target echo signal, gating circuit connect, signal allows to enter the range selector of next stage.If the echoed signal of input is outside the time of strobe pulse effect, just be considered to undesired signal, gating circuit cuts out, and signal can not be transported to next stage, thereby has filtered undesired signal;
Range selector in described receiving trap judges the amplitude of input signal, if signal amplitude, outside the range of choice of setting, just think undesired signal, only inputs to data processing unit by the signal that meets amplitude decision condition.Data processing unit is the relative velocity that target and radar meter are calculated in Doppler frequency and the radiation beam of being obtained by angle acquisition device and target velocity angular separation according to the difference of emission signal frequency and echoed signal frequency.
Claims (1)
1. a radar meter for anti-electromagnetic interference (EMI), comprises emitter, receiving trap and antenna system, it is characterized in that:
Described emitter comprises voltage stabilizer, trigger generator, pulse-modulator, automatic generator and power governor, trigger generator is connected with pulse-modulator, automatic generator and power governor successively, and voltage stabilizer is connected with trigger generator, pulse-modulator and automatic generator respectively;
Described receiving trap comprises high frequency filter, wave detector, amplifier, terminal amplifier, strobe pulse shaper, gating circuit, range selector, angle acquisition device and data processing unit in advance, strobe pulse shaper is connected with trigger generator and gating circuit respectively, gating circuit is connected with range selector and terminal amplifier respectively, data processing unit is connected with range selector and angle Selection device respectively, and amplifier, wave detector and high frequency filter are connected terminal amplifier successively with in advance;
Described antenna system comprises emitting antenna and receiving antenna, and emitting antenna is connected with power governor, and receiving antenna is connected with high frequency filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320778014.7U CN203658578U (en) | 2013-11-29 | 2013-11-29 | Anti-electromagnetic-interference radar tachymeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320778014.7U CN203658578U (en) | 2013-11-29 | 2013-11-29 | Anti-electromagnetic-interference radar tachymeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203658578U true CN203658578U (en) | 2014-06-18 |
Family
ID=50924953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320778014.7U Expired - Fee Related CN203658578U (en) | 2013-11-29 | 2013-11-29 | Anti-electromagnetic-interference radar tachymeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203658578U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105891792A (en) * | 2015-02-16 | 2016-08-24 | 松下知识产权经营株式会社 | Radar device |
-
2013
- 2013-11-29 CN CN201320778014.7U patent/CN203658578U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105891792A (en) * | 2015-02-16 | 2016-08-24 | 松下知识产权经营株式会社 | Radar device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9612147B2 (en) | Radar level gauge system with multiple receiver branches | |
| CN105158763A (en) | Meteorological radar system based on continuous wave system and control method | |
| CN108802715B (en) | Radio altimeter of digital pulse system | |
| CN104914429B (en) | Target indication radar system capable of adaptively selecting waveform according to target distance | |
| WO2017096695A1 (en) | Distance measurement and tracking positioning apparatus and method for mobile device | |
| CN103926590A (en) | Ranging distance laser multi pulse distance measuring method and distance measuring device thereof | |
| CN105572670A (en) | Flying bird detection radar system | |
| CN105204023A (en) | Echo signal processing method and device of weather radar system based on continuous wave system | |
| CN108802734A (en) | A kind of method and device that control radar system sequence synchronizes | |
| RU2694891C1 (en) | Method for operation of a pulse-doppler on-board radar station of a fighter while ensuring energy security of its operation for emission | |
| CN203658578U (en) | Anti-electromagnetic-interference radar tachymeter | |
| RU2016114998A (en) | Radar method for detecting and determining motion parameters of low-altitude, low-observable objects in the decameter range of radio waves | |
| CN109581369A (en) | The radar altimeter of non-homogeneous multichannel perseverance difference frequency system | |
| RU2334244C1 (en) | Method of radio radiation source location detection | |
| CN106842159B (en) | The calculation method of information content in a kind of radar target acquisition | |
| CN108919273A (en) | A kind of distance detection system and method | |
| WO2018121470A1 (en) | Fmcw radar frequency-time waveform modulation method, apparatus and electronic device | |
| CN107678030A (en) | A kind of unmanned plane obstacle avoidance system based on millimetre-wave radar | |
| Pardhu et al. | Design of matched filter for radar applications | |
| KR101634455B1 (en) | Radar using linear frequency modulation signal and noise signal, and method for controlling the same | |
| CN203705637U (en) | High-precision ultrasonic range finder | |
| RU2539334C1 (en) | System for electronic jamming of radio communication system | |
| CN104777459A (en) | Radar anti-interference system | |
| RU2444026C1 (en) | Radar station for ship navigation | |
| CN204649960U (en) | A kind of pick-up unit for radar landform bounce-back undesired signal |
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 |
Granted publication date: 20140618 Termination date: 20151129 |
|
| EXPY | Termination of patent right or utility model |