CN105022033A - Radar device and control method - Google Patents
Radar device and control method Download PDFInfo
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- CN105022033A CN105022033A CN201510363060.4A CN201510363060A CN105022033A CN 105022033 A CN105022033 A CN 105022033A CN 201510363060 A CN201510363060 A CN 201510363060A CN 105022033 A CN105022033 A CN 105022033A
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- 238000009434 installation Methods 0.000 claims description 75
- 230000008859 change Effects 0.000 claims description 11
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- 238000001514 detection method Methods 0.000 abstract description 36
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Classifications
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- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
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- Radar, Positioning & Navigation (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention relates to a radar device and a control method. The device comprises a controller, a transmitter, a transmitting antenna and a receiver; the device further comprises a controllable attenuator, and a first signal input end of the controllable attenuator is connected with a signal output end of the transmitter; a second signal input end of the controllable attenuator is connected with a second signal output end of the controller; a signal output end of the controllable attenuator is connected with a signal input end of the transmitting antenna; a signal output end of the receiver is connected with a signal input end of the controller; the transmitter generates a detecting signal, and the detecting signal is transmitted to the controllable attenuator; the controllable attenuator adjusts power of the detecting signal sent to the transmitting antenna according to a control signal of the controller; and the controller determines an interference signal according to an echo signal received by the receiver, and adjusts the detecting signal of the transmitter according to the interference signal. Mutual interferences between radar devices in the same area can be prevented, and detection performance is improved.
Description
Technical field
The present invention relates to radar detection technique field, particularly relate to a kind of radar installations and control method.
Background technology
Compared with other active sensors, radar has the advantages such as round-the-clock, detection range is far away, is therefore widely used in active detecting field.In a region, radar density is increasing, when the frequency band of two or more radars, or when modulation system is identical or close, these two or more radars can be caused mutually to disturb, thus cause following problem: on the one hand, if interference is too much, the burden of the signal processor of radar can be increased, under extreme case, radar is caused not work; On the other hand, radar jamming can cover target, has influence on the detection performance of this radar, even may false retrieval or undetected target.
Summary of the invention
One of them object of the present invention is to provide a kind of radar installations and control method, to solve the technical matters that in same region, radar installations signal disturbs mutually.
First aspect, the invention provides a kind of radar installations, comprises controller, transmitter, emitting antenna and receiver, also comprises controllable attenuator, and the first signal input part of described controllable attenuator is connected with the signal output part of described transmitter; The secondary signal input end of described controllable attenuator is connected with the secondary signal output terminal of described controller; The signal output part of described controllable attenuator is connected with the signal input part of described emitting antenna; The signal output part of described receiver is connected with the signal input part of described controller;
Described transmitter produces detectable signal according to the control signal of described controller and transfers to described controllable attenuator; Described controllable attenuator according to the control signal of described controller to regulate to described emitting antenna send the emissive power of detectable signal; The echoed signal determination undesired signal that described controller receives according to described receiver, and the detectable signal of described transmitter is adjusted according to described undesired signal.
Second aspect, the embodiment of the present invention additionally provides a kind of radar installations control method, in above-mentioned radar installations, comprising:
Transmitter produces detectable signal according to the control signal of controller and transfers to controllable attenuator;
Described controllable attenuator according to the control signal of described controller to regulate to described emitting antenna send the emissive power of detectable signal;
The echoed signal determination undesired signal that described controller receives according to described receiver, and the detectable signal of described transmitter is adjusted according to undesired signal.
Alternatively, the step of the detectable signal of the described transmitter of described adjustment comprises:
Change transmitter produce frequency band or the modulation system of detectable signal.
Alternatively, the step of the described echoed signal determination undesired signal received according to described receiver comprises:
To reduce to described emitting antenna send the emissive power of detectable signal;
Process the echoed signal received and also analyze whether have undesired signal.
Alternatively, whether described analysis has the step of undesired signal to comprise:
Obtain the noise power of the echoed signal that receiver receives, if described noise power is greater than noise power preset value in preset time period, then there is undesired signal in described echoed signal.
The radar installations that the embodiment of the present invention provides, produces different decay by controller control controllable attenuator and decays to the detectable signal that transmitter is launched, make radar installations be operated in normal operating conditions and Interference Detection duty respectively.In Interference Detection duty, the echoed signal determination undesired signal that controller receives according to receiver, according to the detectable signal of undesired signal adjustment transmitter.By adjusting the interference that this detectable signal can be avoided in the same area between different radar installations, thus reducing the impact disturbed and radar installations is normally worked, improving the detection performance of radar installations.
Accompanying drawing explanation
Can understanding the features and advantages of the present invention clearly by reference to accompanying drawing, accompanying drawing is schematic and should not be construed as and carry out any restriction to the present invention, in the accompanying drawings:
Fig. 1 is a kind of radar installations structural representation that the embodiment of the present invention provides;
Fig. 2 is the another kind of radar installations structural representation that the embodiment of the present invention provides;
Fig. 3 is another radar installations structural representation that the embodiment of the present invention provides.
Fig. 4 is a kind of radar installations Control timing sequence schematic diagram that the embodiment of the present invention provides;
Fig. 5 is the control method schematic flow sheet of a kind of radar installations that the embodiment of the present invention provides.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment one
Embodiments provide a kind of radar installations, as shown in Figure 1, comprise controller 110, transmitter 120, emitting antenna 150 and receiver 100, also comprise controllable attenuator 140, the first signal input part of controllable attenuator 140 is connected with the signal output part of transmitter 120; The secondary signal input end of controllable attenuator 140 is connected with the secondary signal output terminal of controller 110; The signal output part of controllable attenuator 140 is connected with the signal input part of emitting antenna 150; The signal output part of receiver 100 is connected with the signal input part of controller 110;
Transmitter 120 produces detectable signal according to the control signal of controller 110 and transfers to controllable attenuator 140; Controllable attenuator 140 according to the control signal of controller 110 to regulate to emitting antenna 150 send the emissive power of detectable signal; The echoed signal determination undesired signal that controller 110 receives according to receiver 100, and the detectable signal adjusting transmitter 120 according to undesired signal.
Will be understood that, controllable attenuator comprises two kinds of duties: normal operating conditions and Interference Detection duty.Wherein, during normal operating conditions, the decay that controllable attenuator now produces detectable signal is smaller, and ideally, detectable signal can zero-decremently be gone out by transmission antennas transmit; During Interference Detection duty, the attenuation ratio that controllable attenuator now produces detectable signal is comparatively large, and ideally, detectable signal is not by this controllable attenuator.In practical application, controllable attenuator decays to detectable signal, as long as the emissive power of the detectable signal launched is enough little, makes this radar installations can not the detection of a target, and does not affect other radar installationss of the same area.In addition, the controllable attenuator that the embodiment of the present invention provides can produce different decay, and the detectable signal that emitting antenna sends can cover different scopes, and those skilled in the art can set as the case may be.
The radar installations that the embodiment of the present invention provides, produces different decay by controller control controllable attenuator and decays to the detectable signal that transmitter is launched, thus regulate the emissive power of the detectable signal arriving emitting antenna.The echoed signal determination undesired signal that controller receives according to receiver, according to the detectable signal of undesired signal adjustment transmitter.Can avoid disturbing between different radar installations in the same area by adjusting this detectable signal, thus reduce interference to impact during target detection, improve the detection performance of radar installations.
Embodiment two
The embodiment of the present invention further provides a kind of radar installations, as shown in Figure 2, comprises controller 110, transmitter 120, emitting antenna 150, receiving antenna 105, controllable attenuator 140, also comprises coupling mechanism 130 and frequency mixer 160;
The signal input part of coupling mechanism 160 is connected with the signal output part of transmitter 120, and the signal output part of coupling mechanism 130 is connected with the first signal input part of controllable attenuator 140; Coupling mechanism 130 is coupled to frequency mixer 160 for the detectable signal exported by transmitter 120;
Second input end of frequency mixer 160 is connected with the signal output part of receiving antenna 105, and the signal output part of frequency mixer 160 is connected with the signal input part of signal conditioning circuit 170; Frequency mixer 160 is for obtaining base band echoed signal by carrying out mixing from the echoed signal of receiving antenna 105 and detectable signal.
Fig. 4 shows the work schedule schematic diagram of a kind of radar installations that the embodiment of the present invention provides, and introduces the principle of work of this radar installations below in conjunction with Fig. 4.As shown in Figure 4, the radar installations that the embodiment of the present invention provides comprises normal operating conditions and Interference Detection duty.When radar installations enters normal operating conditions, it is CPI (CoherentProcessing Interval that controller produces N number of duration, coherent processing inteval) low level control signal, this control signal can control controllable attenuator and produce less decay, make this radar installations carry out normal operating conditions, the detection of a target also estimates the parameter obtaining target.
Controller 110 sends control signal, this control signal controls controllable attenuator 140 and produces suitable decay, make to transmit and can be sent to emitting antenna 150 by controllable attenuator 140, and radiate by emitting antenna 150, the detectable signal launched can detect the target in certain limit, and runs into target back reflection formation echoed signal.
Receiving antenna 105 receives this echoed signal and transfers to frequency mixer 160, and the detectable signal coupling part that transmitter 120 is launched by coupling mechanism 130 as local oscillated signal, and transfers to frequency mixer 160.Above-mentioned part detection signal and echoed signal are carried out mixing by this frequency mixer 160.The frequency of the base band echoed signal that frequency mixer 160 exports can be the combination of the difference of detectable signal and the frequency sum of echoed signal, the difference of frequency or frequency sum and frequency.The feature of high frequency band is operated according to radar installations, alternatively, the difference of the frequency sonding signal of base band echoed signal and the frequency of echoed signal in the embodiment of the present invention.The object of mixing reduces the frequency band being operated in the detectable signal of high frequency band, is convenient to follow-uply to process echoed signal.The base band echoed signal that frequency mixer 160 exports carries out filter and amplification through signal conditioning circuit 170 again, and the bandwidth for transmission adjusting this base band echoed signal is to controller 110, realize target Detection and Parameter Estimation.
Controller 110 pairs of base band echoed signals judge, determine whether there is undesired signal in the echoed signal that receiver receives.Be understandable that, the undesired signal of embodiment of the present invention indication refers to the echoed signal of the frequency band of the detectable signal that the radar installations provided with the embodiment of the present invention is launched or modulation system identical or close (also likely causing larger interference when frequency band is close with modulation system).If do not have undesired signal, controller 110 without the need to changing control signal, thus makes transmitter adopt current frequency band or modulation system to continue emission detection signal.
When receiving antenna 105 receives with the frequency band of detectable signal or the close echoed signal of modulation system, the noise power of this radar installations can be caused to raise suddenly at short notice or occur false target, now, judge in the same area, there are other radar installationss that this radar installations can be caused to disturb.
The radar installations that the embodiment of the present invention provides also is provided with Interference Detection duty.As shown in Figure 3, in order to determine that the echoed signal that receiver receives is that the undesired signal of other radar emission generation in the same area or the detectable signal of this radar installations transmitting are detected the echoed signal after thing reflection.Therefore, this radar installations when Interference Detection duty, need controller 110 produce a duration be CPI high level control controllable attenuator 140 produce larger decay, make the emissive power of emitting antenna 150 emission detection signal less.Now, this radar installations normally cannot detect target, and detectable signal also can not affect other radar installationss in this radar installations the same area.
Now, receiving antenna 105 receives echoed signal and transfers to frequency mixer 160, and the detectable signal that transmitter 120 is launched is coupled to frequency mixer 160 as local oscillated signal by coupling mechanism 130.Echoed signal and detectable signal are carried out mixing by this frequency mixer 160, obtain base band echoed signal.When this base band echoed signal transfers to controller 110, obtain the noise power of base band echoed signal, if noise power is greater than noise power preset value in setting-up time section, or false target detected, controller 110 confirms to there is undesired signal, and namely this radar installations working band or modulation system are occupied in current operating environment.Now, controller 110 adjusts control signal, to change frequency band or the modulation system of the detectable signal that transmitter 120 is launched.Then, radar installations repeats the Interference Detection course of work, changes control signal, until when not having undesired signal or undesired signal very little in echoed signal, this radar installations just adopts the frequency band after adjusting or modulation system to carry out work in next cycle.
The embodiment of the present invention by increasing controllable attenuator in radar installations, and add Interference Detection duty, whether radar installations detects when being in this state in the same area exists the radar installations that other can cause interference, if there is the radar installations being operated in same frequency band or modulation system, then change frequency band or the modulation system of this radar installations emission detection signal, the problem that in this region, multi-section radar installations disturbs mutually can be avoided like this, strengthen adaptive capacity to environment and the detection of a target ability of radar installations.
Alternatively, the radar installations that the embodiment of the present invention provides also comprises signal conditioning circuit 170, the signal input part of this signal conditioning circuit 170 is connected with the signal output part of frequency mixer 160, and the signal output part of signal conditioning circuit 170 is connected with the signal input part of 110 controllers;
Signal conditioning circuit 170 carries out processing for the base band echoed signal of self-mixing device 160 in future and transfers to controller 110.
Alternatively, this signal conditioning circuit 170 pairs of base band echoed signals are amplified, and adjust the bandwidth of this base band echoed signal.
The embodiment of the present invention can carry out filtering to base band echoed signal by this signal conditioning circuit, only allows by the base band echoed signal with set frequency band, can improve the speed that controller 110 processes base band echoed signal like this; And the detection perform of radar installations can be improved.
Embodiment three
The embodiment of the present invention additionally provides a kind of radar installations, as shown in Figure 3, comprises controller 110, transmitter 120, emitting antenna 150, receiving antenna 105, low noise radio frequency amplifier 180 and wave detector 190.
In embodiments of the present invention, controller 110 sends control signal and sends to transmitter.Transmitter 120 produces detectable signal according to control signal and transfers to controllable attenuator 140.This detectable signal is operated in frequency band and the modulation system of setting, and the control signal adjusting controller 110 can change frequency band and the modulation system of detectable signal.
Controller 110 produces and controls the control signal of controllable attenuator 140, and wherein, as shown in Figure 4, this control signal comprises high level that duration is CPI or duration is the low level of CPI.When control signal be duration is the low level of CPI, now the emissive power of controllable attenuator 140 pairs of detectable signals produces less decay, and now detectable signal can be radiate by emitting antenna 150.When control signal be duration is the high level of CPI, the emissive power of controllable attenuator 140 pairs of detectable signals produces larger decay, now only has a small amount of detectable signal can transfer to emitting antenna 150 by controllable attenuator.
Receiving antenna 105 receives echoed signal and transfers to low noise radio frequency amplifier 180, and radio frequency signal amplifies, and adjusts the bandwidth of signal.When transferring to controller 110 after wave detector 190 detection, obtain the noise power of echoed signal, if the noise power of echoed signal is greater than noise power preset value in setting-up time section, or false target detected, controller 110 confirms to exist with described detectable signal with frequency band or the undesired signal with identical modulation system in echoed signal, and this radar installations working band or modulation system are occupied in current operating environment.Controller 110 adjusts control signal, to change frequency band or the modulation system of the detectable signal that transmitter 120 is launched.
Pass through said process, the embodiment of the present invention can change frequency band or the modulation system of radar installations institute emission detection signal, the detectable signal of this radar installations is made not affect other radar installationss, simultaneously the detectable signal of other radar installationss or echoed signal also do not affect this radar installations, thus avoid mutual interference phenomenon occurs between radar installations, the detection performance of radar installations can be improved.
Embodiment four
For embodying the superiority of a kind of radar installations that the embodiment of the present invention provides further, the embodiment of the present invention further provides a kind of radar installations control method, as shown in Figure 5, comprising: transmitter produces detectable signal according to the control signal of controller and transfers to controllable attenuator; Controllable attenuator according to the control signal of controller to regulate to emitting antenna send the emissive power of detectable signal; The echoed signal determination undesired signal that controller receives according to receiver, and the detectable signal adjusting transmitter according to undesired signal.Detailed description is launched to the control method that the embodiment of the present invention provides below.
First introduce transmitter produce detectable signal according to the control signal of controller and transfer to the step of controllable attenuator.
In embodiments of the present invention, as shown in Figure 1 to 4, controller 110 sends control signal and sends to transmitter.Transmitter 120 produces detectable signal according to control signal and transfers to controllable attenuator 140.This detectable signal is operated in frequency band and the modulation system of setting, and the control signal adjusting controller 110 can change frequency band and the modulation system of detectable signal.
Next introduce controllable attenuator according to the control signal of controller to regulate to emitting antenna send the step of the emissive power of detectable signal.
As shown in FIG. 1 to 3, controller 110 produces and controls the control signal of controllable attenuator 140, and wherein, as shown in Figure 4, this control signal comprises high level that duration is CPI or duration is the low level of CPI.When control signal be duration is the low level of CPI, now the emissive power of controllable attenuator 140 pairs of detectable signals produces less decay, and now detectable signal can be radiate by emitting antenna 150.When control signal be duration is the high level of CPI, the emissive power of controllable attenuator 140 pairs of detectable signals produces larger decay, now only has a small amount of detectable signal can transfer to emitting antenna 150 by controllable attenuator.
Finally introduce the echoed signal determination undesired signal that controller receives according to receiver, and adjust the step of the detectable signal of transmitter according to undesired signal.
Receiving antenna 105 receives echoed signal and transfers to frequency mixer 160, and the detectable signal that transmitter 120 is launched is coupled to frequency mixer 160 as local oscillated signal by coupling mechanism 130.Echoed signal and detectable signal are carried out mixing by this frequency mixer 160, obtain base band echoed signal.Because this base band echoed signal is fainter, also need to amplify base band echo information, and adjust the bandwidth of this base band echoed signal.When this base band echoed signal transfers to controller 110, obtain the noise power of base band echoed signal, if the noise power of base band echoed signal is greater than noise power preset value in setting-up time section, or false target detected, controller 110 confirms to exist with described detectable signal with frequency band or the undesired signal with identical modulation system in base band echoed signal, and this radar installations working band or modulation system are occupied in current operating environment.Controller 110 adjusts control signal, to change frequency band or the modulation system of the detectable signal that transmitter 120 is launched.
Pass through said process, the embodiment of the present invention can change frequency band or the modulation system of radar installations institute emission detection signal, the detectable signal of this radar installations is made not affect other radar installationss, simultaneously the detectable signal of other radar installationss or echoed signal also do not affect this radar installations, thus avoid mutual interference phenomenon occurs between radar installations, the detection performance of radar installations can be improved.
In sum, a kind of radar installations provided by the invention and control method, by controlling controllable attenuator, the radar installations that the embodiment of the present invention is provided is operated in normal work and Interference Detection duty.The noise power of detection of echoes signal when Interference Detection duty, or detection of false target determines whether there is undesired signal.When there is undesired signal, by change this radar installations send frequency band or the modulation system of detectable signal, avoid disturbing between radar installations, there is good target detection capabilities.Meanwhile, present invention also improves the performance of the radar installations detection of a target.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (5)
1. a radar installations, comprises controller, transmitter, emitting antenna and receiver, it is characterized in that,
Also comprise controllable attenuator, the first signal input part of described controllable attenuator is connected with the signal output part of described transmitter; The secondary signal input end of described controllable attenuator is connected with the secondary signal output terminal of described controller; The signal output part of described controllable attenuator is connected with the signal input part of described emitting antenna; The signal output part of described receiver is connected with the signal input part of described controller;
Described transmitter produces detectable signal according to the control signal of described controller and transfers to described controllable attenuator; Described controllable attenuator according to the control signal of described controller to regulate to described emitting antenna send the emissive power of detectable signal; The echoed signal determination undesired signal that described controller receives according to described receiver, and the detectable signal of described transmitter is adjusted according to described undesired signal.
2. a radar installations control method, is characterized in that, in radar installations according to claim 1, comprising:
Transmitter produces detectable signal according to the control signal of controller and transfers to controllable attenuator;
Described controllable attenuator according to the control signal of described controller to regulate to described emitting antenna send the emissive power of detectable signal;
The echoed signal determination undesired signal that described controller receives according to described receiver, and the detectable signal of described transmitter is adjusted according to undesired signal.
3. radar installations control method as claimed in claim 2, it is characterized in that, the step of the detectable signal of the described transmitter of described adjustment comprises:
Change transmitter produce frequency band or the modulation system of detectable signal.
4. radar installations control method as claimed in claim 2, is characterized in that, the step of the described echoed signal determination undesired signal received according to described receiver comprises:
To reduce to described emitting antenna send the emissive power of detectable signal;
Process the echoed signal received and also analyze whether have undesired signal.
5. radar installations control method as claimed in claim 2, it is characterized in that, whether described analysis has the step of undesired signal to comprise:
Obtain the noise power of the echoed signal that receiver receives, if described noise power is greater than noise power preset value in preset time period, then there is undesired signal in described echoed signal.
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| CN110275171A (en) * | 2018-03-15 | 2019-09-24 | 郑州宇通客车股份有限公司 | A kind of Radar for vehicle detecting and control method and vehicle |
| CN110275170B (en) * | 2018-03-15 | 2021-12-03 | 郑州宇通客车股份有限公司 | Radar detection control method for vehicle and vehicle |
| CN113348383A (en) * | 2018-10-24 | 2021-09-03 | 红色领袖科技公司 | Lidar system and method of operation |
| CN109799491A (en) * | 2019-02-27 | 2019-05-24 | 珠海格力电器股份有限公司 | Method and device for controlling working mode of microwave radar equipment |
| CN114204961A (en) * | 2020-09-02 | 2022-03-18 | Oppo广东移动通信有限公司 | Near field communication circuit, near field communication method, electronic device, and storage medium |
| CN114204961B (en) * | 2020-09-02 | 2022-12-30 | Oppo广东移动通信有限公司 | Near field communication circuit, near field communication method, electronic device, and storage medium |
| CN112568871A (en) * | 2020-12-10 | 2021-03-30 | 上海无线电设备研究所 | Non-contact vital sign monitoring device and method thereof |
| CN113567952A (en) * | 2021-02-04 | 2021-10-29 | 北京一径科技有限公司 | Laser radar control method and device, electronic device and storage medium |
| CN113075627A (en) * | 2021-04-14 | 2021-07-06 | 南京慧尔视智能科技有限公司 | Traffic radar anti-interference method and device used under urban dense traffic flow condition |
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