CN101322016A - Filling level radar frequency converter - Google Patents
Filling level radar frequency converter Download PDFInfo
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- CN101322016A CN101322016A CN200680045598.XA CN200680045598A CN101322016A CN 101322016 A CN101322016 A CN 101322016A CN 200680045598 A CN200680045598 A CN 200680045598A CN 101322016 A CN101322016 A CN 101322016A
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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
- 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
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
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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
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
One embodiment of the invention relates to a frequency converter for a level radar, comprising a signal generator unit, a receiver circuit, a transmit coupler, and an amplifier. The amplifier is used for amplifying the transmit signal at the high-frequency end of the frequency converter. A mixer or a multiplier can be provided to convert frequencies.
Description
Related application
The application requires in the right of priority of the U.S. Provisional Patent Application 60/774,403 of the U.S. Provisional Patent Application 60/742,410 of submission on Dec 5th, 2005 and submission on February 17th, 2006, and its content is incorporated herein by reference.
Technical field
The present invention relates to level gauging.Especially, the present invention relates to a kind of frequency converter that is used for fill level radar, a kind of fill level radar that is used for determining jar material level is used for the application of level gauging and a kind of method that is used to fill level radar to carry out frequency inverted with this frequency converter.
Background technology
Disclosed level gauging equipment except be used to launch or the antenna of receiving radar ripple or microwave also have frequency converter, the electromagnetic signal that this frequency converter generates the transponder pulse oscillator is to high frequency conversion.
DE 43 31 353 relates to a kind of radar-distance measuring equipment that has freq converting circuit, and this freq converting circuit has local oscillator, frequency mixer and antenna terminal.Freq converting circuit is converted to higher frequency with the frequency of the signal that radar module received by another frequency compounding with local oscillator, transmits to be sent to antenna terminal with this higher frequency.
At this, emissive power is relevant with the power of frequency mixer.After leaving frequency mixer, can not amplify transmitting again.
Summary of the invention
Task of the present invention is, for fill level radar provides a kind of improved frequency inverted.
According to one embodiment of present invention, for fill level radar provides a kind of frequency converter, this frequency converter comprises: the signal generation unit is used to produce the Electromagnetic Launching signal by frequency inverted; Receiving circuit is used for receiving to received signal, to determine material level; The emission coupling mechanism; With first amplifier, be used to amplify by the transmitting and/or received signal of frequency inverted, wherein launch coupling mechanism and have: input end, be used for from the signal generation unit receive amplify, transmitting by frequency inverted; First output terminal, being used for directly will transmit sends to antenna assembly and is used for receiving to received signal from antenna assembly; And second output terminal, be used for received signal is sent to receiving circuit.
Thus, frequency converter according to the present invention has amplifier, before being launched by antenna by the high-frequency emission signal of frequency inverted, this amplifier transmits to this and amplifies, perhaps the received signal that receives at antenna is by before revolution is changed to low frequency, and this amplifier amplifies this received signal.
By this additional amplification, can realize better signal to noise ratio (S/N ratio) and higher susceptibility.Especially, also may measure thus comparatively disadvantageous filler.Otherwise the signal that is reflected under the situation of this filler can be too little, so that can not realize acceptable, available measurement result.
According to another embodiment of the present invention, the emission coupling mechanism have directional coupler, this directional coupler have the symmetry or asymmetrical hybrid circuit (Hybrid).
This asymmetrical hybrid coupler for example may be embodied as 90 ° of hybrid couplers, and this hybrid coupler is particularly suitable for linking to each other with the waveguide-coupled input media of circle.
According to another embodiment of the present invention, antenna assembly has circular waveguide-coupled input media, wherein launches first output terminal of coupling mechanism and circular waveguide-coupled input media coupling, is used for the coupling input and transmits.
As additional advantage, the combination that is made of the 90 ° of hybrid couplers and the circular coupling input media of symmetry has obtained with transmission path and RX path separately.In this way, can save expensive component, for example circulator, and while can be transmitted to antenna with whole maker power.
According to another embodiment of the present invention, implement to be used to produce the signal generation unit of Electromagnetic Launching signal to the frequency between the 120GHz with 60GHz.
For example, frequency converter may be embodied as the high-frequency model of 79GHz.Yet, also may be higher frequency, for example frequency about 120GHz.
According to another embodiment of the present invention, frequency converter comprises that second amplifier is used to amplify received signal, and wherein this second amplifier is arranged on after second output terminal.
According to this embodiment of the invention, two amplifiers have been designed now, wherein first amplifier for example is used for the signal that is input to the emission coupling mechanism is amplified, and second amplifier is used for amplifying received signal or output signal after the emission coupling mechanism comes out.Two amplifiers all are positioned at the high frequency side of frequency converter.Thus, guaranteed the flexible amplification of input signal and output signal.
According to another embodiment of the present invention, the signal generation unit comprises: pulse producer is used to generate first electromagnetic signal with first frequency; Local oscillator is used to generate second electromagnetic signal with second frequency; And first frequency mixer, be used for carrying out frequency inverted by first electromagnetic signal of the second electromagnetic signal paired pulses generator of local oscillator, wherein first frequency mixer is implemented and is used for output and transmits.So be provided with a kind of frequency mixer, it obtains the input signal of pulse producer, and this input signal is mixed down higher frequency by the signal of local oscillator (its for example can at 10GHz between the 25GHz).So transmitted by this mixing, this transmits and is exaggerated subsequently and is fed in the emission coupling mechanism.
According to another embodiment of the present invention, frequency converter comprises second frequency mixer in addition, and this second frequency mixer is used for by the 3rd electromagnetic signal of local oscillator received signal being carried out frequency inverted.So two signals are carried out mixing by identical local oscillator.
For example, also additional local oscillator can be set, it for example strictly is coupled with other local oscillators in phase place, makes two oscillator synchronization move.
For example, second frequency mixer can be mixed down low frequency with the frequency of received signal, makes can easily to be analyzed subsequently by the received signal of frequency inverted.
According to another embodiment of the present invention, the signal generation unit of frequency converter comprises in addition: pulse producer is used to generate first electromagnetic signal with first frequency; And first multiplier, be used for first electromagnetic signal multiplication, and be used for the signal after the multiplication is exported as transmitting pulse producer.
Signal multiplication realizes by for example form harmonic wave on the nonlinear characteristic curve of semiconductor devices.Frequency mixer is optional.According to this embodiment, not two input signals (passing through frequency mixer) addition with different frequency.Or rather, unique input signal is only arranged, this signal doubled (for example doubling) by the factor 4 or the factor 8 or other factors.
Thus, provide a kind of simple circuit, it can provide good signal-to-noise and higher sensitivity.
According to another embodiment of the present invention, frequency converter comprises three-mixer, is used for by the 3rd electromagnetic signal of local oscillator the low frequency signal of pulse producer being carried out frequency inverted, forms thus by the signal of frequency inverted.
According to another embodiment of the present invention, frequency converter also comprises the 3rd amplifier in addition, is used for and will be amplified by the signal of frequency inverted, the loss of gathering in three-mixer with equilibrium.
According to another embodiment of the present invention, provide a kind of fill level radar, be used for determining the material level of jar.This fill level radar has and is used to launch and/or receives electromagnetic antenna and above-mentioned frequency converter.
In addition, provide the application that will frequency converter according to the present invention be used for level gauging.
In addition, provide a kind of method that is used to fill level radar to carry out frequency inverted, this method comprises: generate by the Electromagnetic Launching signal of frequency inverted; The amplifying emission signal; Receive in the input end of emission coupling mechanism be exaggerated transmit; Directly will transmit and send to antenna assembly from first output terminal of emission coupling mechanism; Be received in the received signal in first output terminal of launching coupling mechanism; Received signal is sent to receiving circuit from second output terminal of launching coupling mechanism; And receive to received signal, to determine material level.
Thus, provide a kind of method, can improve the susceptibility of measurement by this method, its mode is, the high frequency side that for example will transmit at frequency converter amplifies.
Transmit and after frequency inverted, to be exaggerated once more thus.
According to another embodiment of the present invention, generate by the step of the electromagnetic signal of frequency inverted and comprise first frequency conversion by first frequency mixer.
In addition, analyze received signal and can comprise second frequency conversion by second frequency mixer to determine material level.
Alternatively, can the modelled signal multiplying assembly, this device is used to following generation Electromagnetic Launching signal: make the nonlinear characteristic curve owing to device form harmonic wave.
Thus, do not need the frequency mixer of input side to be used to produce high-frequency signal.
Additional embodiments of the present invention, task and advantage are by obtaining in the dependent claims.
Description of drawings
Hereinafter with reference to accompanying drawing the preferred embodiments of the present invention are described.
Fig. 1 shows the synoptic diagram of frequency converter.
Fig. 2 shows the synoptic diagram of frequency converter according to an embodiment of the invention.
Fig. 3 shows the synoptic diagram of frequency converter according to another embodiment of the present invention.
Fig. 4 shows the synoptic diagram of frequency converter according to another embodiment of the present invention.
Fig. 5 shows the synoptic diagram of fill level radar according to an embodiment of the invention.
Fig. 6 shows the synoptic diagram of frequency converter according to another embodiment of the present invention.
View in the accompanying drawing is schematically and not to conform with ratio.
Specific embodiment
During accompanying drawing was below described, identical or similar element used identical reference number.
Fig. 1 shows the synoptic diagram of frequency converter.Frequency converter has transponder pulse oscillator 101 (Tx Oszillator).The electromagnetic signal with frequency f 1 that the there is generated is forwarded to emission coupling mechanism 102, and this emission coupling mechanism is given frequency mixer 103 with electromagnetic signal transmission subsequently.
Signal by the filler reflection is received by antenna 105, and Hi-pass filter 104 is given in delivery.Hi-pass filter is transmitted to received signal frequency mixer 103 subsequently, this frequency mixer with frequency be the received signal of f3 and local oscillator that frequency is f2 together again mixing to postback the frequency of penetrating pulse oscillator be lower frequency ranges f1=f3-f2, original, and be submitted to emission coupling mechanism 102.
At this, in frequency mixer 103, be low frequency with the received signal reciprocal transformation.
Subsequently, received signal is launched coupling mechanism 102 and sends to prime amplifier 106.Prime amplifier 106 guides to received signal sampling-frequency mixer 109 subsequently, and this sampling-frequency mixer additionally receives the signal of sweep oscillator 108.The output signal of sampling-frequency mixer 109 is delivered to intermediate frequency amplifier 110 subsequently, and subsequently can be analyzed, so that for example determine material level.
In this system, according to employed frequency mixer, emissive power is approximately-5dBm to 0dBm.Like this, maximum insertable about 75dB to 80dB that decays to.
Fig. 2 shows the synoptic diagram of frequency converter according to an embodiment of the invention.As can seeing among Fig. 2, frequency converter 200 has signal generation unit 217, receiving circuit 216, amplifier 204, amplifier 207, local oscillator 202 and emission coupling mechanism 206.
This transmits and 220 is exaggerated device 204 subsequently and amplifies, and is transmitted to emission coupling mechanism 206 as the signal 213 that is exaggerated subsequently.
That emission coupling mechanism 206 for example is embodied as symmetry or asymmetrical hybrid coupler or be embodied as circulator (Zirkulator).Signal 213 passes through emission coupling mechanism 206 under the situation of less decay, and is transmitted to antenna system 205 as signal 223.Antenna system 205 is embodied as and is used for emission/reception high-frequency signal, and comprises for example waveguide, be used for signal from the emission coupling mechanism 206 be transferred to antenna and with signal to transmission back.
Be noted that and nonessential two amplifiers 204,207 that are provided with at this.Or rather, according to should still amplifying output signal 214 by amplification input signal 220, a unique amplifier also can only be set, for example amplifier 204 or only amplifier 207.Under any circumstance, amplifier all is arranged on the high frequency side of frequency converter 200.
Receiving circuit 216 comprises frequency mixer 208, sampling-frequency mixer 225, pulse producer 226 and intermediate frequency amplifier 227.
Between second frequency mixer 208 and sampling-frequency mixer 225, can connect another amplifier (not shown in Figure 2).
Be noted that local oscillator 202,221 can be different oscillator.But they also may be embodied as a unique oscillator, and this oscillator is frequency mixer 203,208 feeds.
In receiving circuit 216, the received signal that is exaggerated with frequency f 3 is fed in second frequency mixer 208 subsequently, and this second frequency mixer is also presented signal 222 to have frequency f 2 by local oscillator 202.At this, carry out reverse mixing now to lower frequency.The frequency that has that obtains is that the signal 224 of f1=f3-f2 is sent to sampling-frequency mixer 225 subsequently, and in sampling-frequency mixer, this signal is sampled.Signal 229 that be sampled, time delay amplifies by amplifier 227 subsequently once more, and is used for analyzing and definite material level as intermediate-freuqncy signal on medium frequency output end 209.
The system of Gou Jianing has realized obviously higher susceptibility like this.Use according to amplifier, maximum insertable decay reaches about 95dB in measuring section.
Fig. 3 shows the synoptic diagram of frequency converter according to another embodiment of the present invention.Have band in addition at the frequency converter shown in Fig. 3 200 and lead to 302, and band logical 302 is arranged between first frequency mixer 203 and the pulse producer 201.In addition, the module that is embodied as the 79GHz high-frequency model of Fig. 3 has second band logical 303.This second band logical 303 is arranged between first frequency mixer 203 and first amplifier 204.
In addition, be provided with circular waveguide-coupled input media 301, so that, perhaps signal (from antenna) is sent to emission coupling mechanism 206 from emission coupling mechanism 206 coupling input signals.Emission coupling mechanism 206 is embodied as 90 ° of hybrid circuits at this.
Two frequency mixer 203,208 are by local oscillator 202 (its for example produce 10GHz to the frequency the 25GHz) and multiplier 304 feeds.Multiplier 304 has direct supply 312, and this direct supply can be on the service voltage equally constantly, perhaps is supplied to the pulse input signal of two pulse producers 201 and 226.
The low frequency signal that is reversed mixing sends to sampling-frequency mixer 225 by second frequency mixer 208.In addition, the signal 228 of pulse producer 226 is fed to sampling-frequency mixer 225.Can connecting band logical 306 between sampling-frequency mixer 225 and pulse producer 226.
The output signal of sampling-frequency mixer 225 is amplified by amplifier 227, and is used for further handling and analyzing at medium frequency output end 209.
Fig. 4 shows the synoptic diagram according to another frequency converter of the present invention.The frequency converter of Fig. 4 this have also except having pulse producer 201 that band is logical 302, multiplier 403 and another band logical 303.Multiplier 403 carries out signal multiplication by the harmonic wave on the nonlinear characteristic curve that forms semiconductor devices (for example transistor or diode).
The signal that is generated by pulse producer 201 for example has the frequency of f1=10GHz.By the factor 8 multiplication or filtered signal 220 for example have the frequency of f3=8*10GHz=80GHz.Nature also can generate other frequencies.
In this way, provide a kind of simple circuit, this circuit can be implemented in will transmit after the frequency multiplication and 220 be enlarged into high frequency.
Fig. 5 shows the synoptic diagram of fill level radar according to another embodiment of the present invention.
At this, fill level radar 500 has signal generation unit 217, amplifier 204, emission coupling mechanism 206 and receiving circuit 216.In addition, designed a kind of antenna assembly 205 that has circular waveguide-coupled input media 301.
Fig. 6 shows the synoptic diagram of frequency converter according to another embodiment of the present invention.Frequency converter shown in Figure 6 is worked as the system described in Fig. 3.Yet, removed the sampling-frequency mixer 225 of in Fig. 3, under the lower frequency situation, working.
Alternatively, low frequency microwave pulse (for example 10GHz) upwards is mixed down for example higher frequency of 80GHz on frequency mixer 604.This signal can be enhanced on level by amplifier 602 now equally, so that the loss of being gathered in the balanced mixer 208 once more.Then, this signal and signal one received and that be exaggerated in amplifier 207 coexist and reduce to intermediate frequency in sampling-frequency mixer 601.
Advantage in this system is, only needs mixing once (in 601) in receiving branch.Loss in second frequency mixer (604 among 208 among Fig. 3 or Fig. 6) can be by amplifier 602 equilibriums.According to quality, the mixing loss that occurs on frequency mixer 208 among Fig. 3 is about 10...15dB.With respect to the system among Fig. 3, the susceptibility of above-described system can be improved this value.
The performance of sampling-frequency mixer 601 changes with respect to the sampling-frequency mixer among Fig. 3 225 by adjusting to high frequency only unimportantly, and wherein sampling-the frequency mixer among Fig. 3 is worked in the lower frequency situation.
Replenish ground, it is to be noted that " comprising " do not get rid of other original papers or step, " one " or " one " does not get rid of a plurality of.It is to be noted in addition, also can be used in combination with other features or the step of other the foregoing descriptions with reference to described feature of one of the foregoing description or step.Reference marker in the claims should not be considered as restriction.
Claims (according to the modification of the 19th of treaty)
1. frequency converter that is used for fill level radar, described frequency converter (200) comprising:
Signal generation unit (217) is used to produce the Electromagnetic Launching signal (220) by frequency inverted;
Receiving circuit (216) is used for receiving to received signal, to determine material level;
Sampling-frequency mixer (225) is used for received signal is carried out time delay;
First amplifier (204) is used to amplify transmit (220) or received signal by frequency inverted;
Emission coupling mechanism (206), it has: input end (213), be used for receive amplifying from signal generation unit (217), by transmit (220) of frequency inverted; First output terminal (223), being used for directly will transmit sends to antenna assembly (205) and is used for receiving to received signal from antenna assembly (205); And second output terminal (214), be used for received signal is sent to receiving circuit (216); And
Wherein signal generation unit (217) has first frequency converting unit (203), be used for to transmit and carry out frequency inverted, and receiving circuit (216) has second frequency converting unit (208,401) and is used for carrying out frequency inverted with received signal or by the signal that pulse producer (226) generates.
2. frequency converter according to claim 1 is wherein launched coupling mechanism (206) and is embodied as directional coupler, and this directional coupler has symmetry or asymmetrical hybrid coupler.
3. frequency converter according to claim 1 and 2, wherein antenna assembly (205) has circular waveguide-coupled input media (301); And wherein launch first output terminal (223) and waveguide-coupled input media (301) coupling that is used to be coupled that input transmits, circular of coupling mechanism (206).
4. each described frequency converter in requiring according to aforesaid right, wherein signal generation unit (217) be implemented as be used to produce frequency at 60GHz to the Electromagnetic Launching signal (220) between the 120GHz.
5. each described frequency converter in requiring according to aforesaid right comprises in addition: second amplifier (204,207) is used to amplify received signal or by transmit (220) of frequency inverted.
6. each described frequency converter in requiring according to aforesaid right, described signal generation unit (217) comprising:
Pulse producer (201) is used to generate first electromagnetic signal with first frequency;
Local oscillator (202) is used to generate second electromagnetic signal with second frequency; And
First frequency mixer (203) is used for carrying out frequency inverted by first electromagnetic signal of second electromagnetic signal (219) the paired pulses generator (201) of local oscillator (202);
Wherein first frequency mixer (203) is implemented and is used for exporting transmit (220).
7. frequency converter according to claim 6 comprises in addition: second frequency mixer (208) is used for carrying out frequency inverted to received signal by the 3rd electromagnetic signal (222) of local oscillator (202).
8. according to each described frequency converter in the claim 1 to 5, described signal generation unit (217) comprising:
Pulse producer (201) is used to generate first electromagnetic signal with first frequency; And
First multiplier (403) is used for first electromagnetic signal multiplication with pulse producer (201), and is used for the signal after the multiplication as (220) output that transmits.
9. according to each described frequency converter in the claim 1 to 6, comprise in addition:
Three-mixer (604) is used for carrying out frequency inverted by the low frequency signal (228) of the 3rd electromagnetic signal (222) the paired pulses generator (226) of local oscillator (202), forms thus by the signal of frequency inverted (603).
10. frequency converter according to claim 9 comprises in addition: the 3rd amplifier (602) is used for to being amplified by the signal of frequency inverted (603) loss of gathering with equilibrium in three-mixer (604).
11. a fill level radar that is used for definite jar material level, described fill level radar comprises:
Be used for emission and/or receive electromagnetic antenna (205); And
According to each described frequency converter (200) in the claim 1 to 8.
12. an application will be used for level gauging according to each described frequency converter (200) in the claim 1 to 8.
13. a method that is used to fill level radar to carry out frequency inverted said method comprising the steps of:
Generation is by the Electromagnetic Launching signal (220) of frequency inverted;
Amplifying emission signal (220);
Receive transmit (220) that are exaggerated in the input end of launching coupling mechanism (206);
Directly will transmit and send to antenna assembly (205) from first output terminal of emission coupling mechanism (206);
Be received in the received signal in first output terminal of launching coupling mechanism (206);
Received signal is sent to receiving circuit (216) from second output terminal (214) of launching coupling mechanism (206);
Before carrying out the time delay of received signal by sampling-frequency mixer (225), carry out frequency inverted to received signal, perhaps before carrying out the time delay of signal by sampling-frequency mixer (225), the signal that the paired pulses generator is generated carries out frequency inverted;
Analyze received signal to determine material level.
14. method according to claim 13 wherein generates and is comprised by first frequency mixer (203) by the Electromagnetic Launching signal (220) of frequency inverted and to carry out first frequency conversion.
15., wherein analyze received signal and carry out the second frequency conversion to determine that material level comprises by second frequency mixer (208) according to claim 13 or 14 described methods.
16., wherein generate Electromagnetic Launching signal (220) and comprise signal multiplication according to each described method in the claim 13 to 15.
Claims (16)
1. frequency converter that is used for fill level radar, described frequency converter (200) comprising:
Signal generation unit (217) is used to produce the Electromagnetic Launching signal (220) by frequency inverted;
Receiving circuit (216) is used for receiving to received signal, to determine material level;
Emission coupling mechanism (206); With
First amplifier (204) is used to amplify transmitting (220) and/or amplify received signal by frequency inverted;
Wherein launching coupling mechanism (206) has: input end (213), be used for receive amplifying from signal generation unit (217), by transmit (220) of frequency inverted; First output terminal (223), being used for directly will transmit sends to antenna assembly (205) and is used for receiving to received signal from antenna assembly (205); And second output terminal (214), be used for received signal is sent to receiving circuit (216).
2. frequency converter according to claim 1 is wherein launched coupling mechanism (206) and is embodied as directional coupler, and this directional coupler has symmetry or asymmetrical hybrid coupler.
3. frequency converter according to claim 1 and 2, wherein antenna assembly (205) has circular waveguide-coupled input media (301); And wherein launch first output terminal (223) and waveguide-coupled input media (301) coupling that is used to be coupled that input transmits, circular of coupling mechanism (206).
4. each described frequency converter in requiring according to aforesaid right, wherein signal generation unit (217) be implemented as be used to produce frequency at 60GHz to the Electromagnetic Launching signal (220) between the 120GHz.
5. each described frequency converter in requiring according to aforesaid right, comprise in addition: second amplifier (207) is used to amplify received signal, and wherein this second amplifier (207) is arranged on second output terminal (214) afterwards.
6. each described frequency converter in requiring according to aforesaid right, described signal generation unit (217) comprising:
Pulse producer (201) is used to generate first electromagnetic signal with first frequency;
Local oscillator (202) is used to generate second electromagnetic signal with second frequency; And
First frequency mixer (203) is used for carrying out frequency inverted by first electromagnetic signal of second electromagnetic signal (219) the paired pulses generator (201) of local oscillator (202);
Wherein first frequency mixer (203) is implemented and is used for exporting transmit (220).
7. frequency converter according to claim 6 comprises in addition: second frequency mixer (208) is used for carrying out frequency inverted to received signal by the 3rd electromagnetic signal (222) of local oscillator (202).
8. according to each described frequency converter in the claim 1 to 5, described signal generation unit (217) comprising:
Pulse producer (201) is used to generate first electromagnetic signal with first frequency; And
First multiplier (403) is used for first electromagnetic signal multiplication with pulse producer (201), and is used for the signal after the multiplication is exported as transmit (220).
9. according to each described frequency converter in the claim 1 to 6, comprise in addition:
Three-mixer (604) is used for carrying out frequency inverted by the low frequency signal (228) of the 3rd electromagnetic signal (222) the paired pulses generator (226) of local oscillator (202), forms thus by the signal of frequency inverted (603).
10. frequency converter according to claim 9 comprises in addition: the 3rd amplifier (602) is used for and will be amplified by the signal of frequency inverted (603), the loss of gathering in three-mixer (604) with equilibrium.
11. a fill level radar that is used for definite jar material level, described section position radar comprises:
Be used for emission and/or receive electromagnetic antenna (205); And
According to each described frequency converter (200) in the claim 1 to 8.
12. an application will be used for level gauging according to each described frequency converter (200) in the claim 1 to 8.
13. a method that is used to fill level radar to carry out frequency inverted said method comprising the steps of:
Generation is by the Electromagnetic Launching signal (220) of frequency inverted;
Amplifying emission signal (220);
Receive transmit (220) that are exaggerated in the input end of launching coupling mechanism (206);
Directly will transmit and send to antenna assembly (205) from first output terminal of emission coupling mechanism (206);
Be received in the received signal in first output terminal of launching coupling mechanism (206);
Received signal is sent to receiving circuit (216) from second output terminal (214) of launching coupling mechanism (206); And
Analyze received signal to determine material level.
14. method according to claim 13 wherein generates and is comprised by first frequency mixer (203) by the Electromagnetic Launching signal (220) of frequency inverted and to carry out first frequency conversion.
15., wherein analyze received signal and carry out the second frequency conversion to determine that material level comprises by second frequency mixer (208) according to claim 13 or 14 described methods.
16., wherein generate Electromagnetic Launching signal (220) and comprise signal multiplication according to each described method in the claim 13 to 15.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74241005P | 2005-12-05 | 2005-12-05 | |
| US60/742,410 | 2005-12-05 | ||
| US77440306P | 2006-02-17 | 2006-02-17 | |
| US60/774,403 | 2006-02-17 | ||
| PCT/EP2006/011675 WO2007065639A1 (en) | 2005-12-05 | 2006-12-05 | Level radar frequency converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101322016A true CN101322016A (en) | 2008-12-10 |
| CN101322016B CN101322016B (en) | 2013-04-24 |
Family
ID=37907422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680045598.XA Expired - Fee Related CN101322016B (en) | 2005-12-05 | 2006-12-05 | Filling level radar frequency converter |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1957948A1 (en) |
| CN (1) | CN101322016B (en) |
| WO (1) | WO2007065639A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102499652A (en) * | 2011-10-27 | 2012-06-20 | 中国人民解放军第四军医大学 | Micropower radar for monitoring life signals |
| CN102759389A (en) * | 2011-04-29 | 2012-10-31 | 罗斯蒙特储罐雷达股份公司 | Pulsed radar level gauge system with higher order harmonic regulation |
| CN103017866A (en) * | 2011-09-27 | 2013-04-03 | 罗斯蒙特储罐雷达股份公司 | MFPW radar level gauging with distance approximation |
| CN105157789A (en) * | 2015-05-15 | 2015-12-16 | 中国科学院沈阳自动化研究所 | High-accuracy measuring radar material level meter |
| CN104487827B (en) * | 2012-05-25 | 2017-11-17 | E·卡茨 | For measuring the device of the dielectric of sample and/or magnetic properties by microwave transmission measurement |
| CN107677339A (en) * | 2016-08-01 | 2018-02-09 | Vega格里沙贝两合公司 | Radar apparatus for measuring charge level |
| CN108801398A (en) * | 2018-06-27 | 2018-11-13 | 福州盛博电子有限公司 | A kind of 120GHz frequency modulated continuous wave radars level meter and distance measuring method |
| CN109839616A (en) * | 2017-11-28 | 2019-06-04 | 大众汽车有限公司 | Radar system and method for running radar system |
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| JPH0744388B2 (en) * | 1989-02-06 | 1995-05-15 | 鋼管電設工業株式会社 | Frequency conversion mixer |
| DE59207284D1 (en) * | 1991-04-18 | 1996-11-07 | Endress Hauser Gmbh Co | METHOD AND ARRANGEMENT FOR DISTANCE MEASUREMENT ACCORDING TO THE RADAR REFLECTING PRINCIPLE |
| DE4331353C2 (en) * | 1993-09-15 | 1995-08-31 | Endress Hauser Gmbh Co | Radar distance measuring device |
| DE19813604A1 (en) * | 1998-03-27 | 1999-09-30 | Daimler Benz Aerospace Ag | Arrangement for precise distance measurement, especially for level measurement |
| US6591086B1 (en) * | 2000-04-24 | 2003-07-08 | Telaxis Communications Corporation | Enhanced time division duplexing (TDD) transceiver circuitry |
| DE10210708B4 (en) * | 2002-03-12 | 2015-05-28 | Intel Mobile Communications GmbH | Mobile device with a circuit arrangement for frequency conversion |
| US6987481B2 (en) * | 2003-04-25 | 2006-01-17 | Vega Grieshaber Kg | Radar filling level measurement using circularly polarized waves |
| EP1562051B1 (en) * | 2004-02-04 | 2012-08-29 | VEGA Grieshaber KG | Method for determining a level of material with a two-wire radar sensor |
-
2006
- 2006-12-05 CN CN200680045598.XA patent/CN101322016B/en not_active Expired - Fee Related
- 2006-12-05 EP EP06829316A patent/EP1957948A1/en not_active Withdrawn
- 2006-12-05 WO PCT/EP2006/011675 patent/WO2007065639A1/en active Application Filing
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| CN102759389A (en) * | 2011-04-29 | 2012-10-31 | 罗斯蒙特储罐雷达股份公司 | Pulsed radar level gauge system with higher order harmonic regulation |
| CN102759389B (en) * | 2011-04-29 | 2016-07-06 | 罗斯蒙特储罐雷达股份公司 | There is the chopping radar levelmeter amount system that high-order harmonic wave regulates |
| CN103017866A (en) * | 2011-09-27 | 2013-04-03 | 罗斯蒙特储罐雷达股份公司 | MFPW radar level gauging with distance approximation |
| CN103017866B (en) * | 2011-09-27 | 2017-03-01 | 罗斯蒙特储罐雷达股份公司 | Using the multifrequency pulse ripple radar levelmeter amount apart from approximation |
| CN102499652A (en) * | 2011-10-27 | 2012-06-20 | 中国人民解放军第四军医大学 | Micropower radar for monitoring life signals |
| CN104487827B (en) * | 2012-05-25 | 2017-11-17 | E·卡茨 | For measuring the device of the dielectric of sample and/or magnetic properties by microwave transmission measurement |
| CN105157789B (en) * | 2015-05-15 | 2018-03-20 | 中国科学院沈阳自动化研究所 | A kind of radar levelmeter of high-acruracy survey |
| CN105157789A (en) * | 2015-05-15 | 2015-12-16 | 中国科学院沈阳自动化研究所 | High-accuracy measuring radar material level meter |
| CN107677339A (en) * | 2016-08-01 | 2018-02-09 | Vega格里沙贝两合公司 | Radar apparatus for measuring charge level |
| CN107677339B (en) * | 2016-08-01 | 2021-10-15 | Vega格里沙贝两合公司 | Radar level measuring device |
| CN109839616A (en) * | 2017-11-28 | 2019-06-04 | 大众汽车有限公司 | Radar system and method for running radar system |
| CN109839616B (en) * | 2017-11-28 | 2023-09-26 | 大众汽车有限公司 | Radar system and method for operating a radar system |
| CN108801398A (en) * | 2018-06-27 | 2018-11-13 | 福州盛博电子有限公司 | A kind of 120GHz frequency modulated continuous wave radars level meter and distance measuring method |
| CN108801398B (en) * | 2018-06-27 | 2019-11-05 | 福州盛博电子有限公司 | A kind of 120GHz frequency modulated continuous wave radar level meter and distance measuring method |
| CN111323779A (en) * | 2018-12-14 | 2020-06-23 | 通用汽车环球科技运作有限责任公司 | Radar system with frequency conversion and corresponding method |
| CN111323779B (en) * | 2018-12-14 | 2024-01-02 | 通用汽车环球科技运作有限责任公司 | Radar system with frequency conversion and corresponding method |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1957948A1 (en) | 2008-08-20 |
| WO2007065639A1 (en) | 2007-06-14 |
| CN101322016B (en) | 2013-04-24 |
| WO2007065639B1 (en) | 2007-07-26 |
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