CN2775679Y - High frequency ground wave radar responsing device - Google Patents
High frequency ground wave radar responsing device Download PDFInfo
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- CN2775679Y CN2775679Y CN 200520095680 CN200520095680U CN2775679Y CN 2775679 Y CN2775679 Y CN 2775679Y CN 200520095680 CN200520095680 CN 200520095680 CN 200520095680 U CN200520095680 U CN 200520095680U CN 2775679 Y CN2775679 Y CN 2775679Y
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Abstract
The utility model discloses a high-frequency ground wave radar responding device based on the frequency shift keying technology (namely the FSK technology), which is mainly composed of a receiving and delaying circuit, a frequency source circuit, a signal reduction circuit, a power amplifying and transmitting circuit, and a synchronous control circuit. The local oscillation frequency, which is arranged, received and transmitted by a computer of the responding device, has the function that the frequency difference between the receiving frequency and the transmitting frequency can be adjusted within 0.2 Hz to 0.7 Hz, providing a responding signal of which the frequency spectrum can be freely changed within the range of 0.2Hz to 0.7Hz for the angle of arrival of a test target signal of a wide-angle radar.
Description
Technical field
The utility model relates to a kind of answering device with the extra large high-frequency ground wave radar of broad beam survey, belongs to the The radar exploration technique field.
Background technology
At present, the broad beam high-frequency ground wave radar is low because of its aerial array simply has cost, the characteristics that floor area is little, so use very general, but this class radar mainly is to rely on software algorithm to improve to the resolution of target, the angle of arrival for the calibration target signal, that is to say the accuracy that to check software algorithm, just require a known answer signal, this signal has been arranged, across the sea, or promptly can calibrate and demarcate high-frequency ground wave radar in the land of condition permission, therefore widebeam radar must be equipped with an answering device and comes the angle of arrival of calibrating signal, and require the frequency spectrum of answer signal in the scope of 0.2--0.7Hz, to change flexibly, and the signal that existing transponder is sent is the fixed frequency spectrum of a 0.5Hz, can not satisfy the needs of broad beam high-frequency ground wave radar well, and the structure of existing transponder is also very complicated to answering device.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of high-frequency ground wave radar answering device, this device transmits the radar main website of receiving and is transformed into intermediate-freuqncy signal and is connected to reduction and radiating circuit after the set time of delaying time, simultaneously with a slice local frequency generator AD9854 two local oscillation signals that frequency is different of form generation with the time-division, in transmitting, insert identification signal, promptly the conversion local frequency makes between the signal frequency of the signal frequency of emission and reception and has the 0.2--0.7Hz frequency difference in emission, thereby reaching by change receiving and the local frequency of emission, realizing making both frequency differences adjustable purpose between 0.2--0.7Hz.
The technical scheme that its technical matters that solves the utility model adopts is: the high-frequency ground wave radar answering device mainly comprises reception and delay circuit, synchronization control circuit, frequency source circuit, signal also primary circuit and power amplification and radiating circuit, receive the high-frequency signal that is input as the radar main website with delay circuit, the delay line output of receiving circuit and signal also primary circuit are connected; The signal of frequency source circuit divides two-way output with the form of FSK (frequency shift keying), and one the tunnel receives and delay circuit, and another road connects also primary circuit of signal; Also primary circuit, frequency source circuit and power amplification are connected with radiating circuit with delay circuit, signal with reception respectively in three tunnel outputs of synchronization control circuit.Wherein, frequency source circuit is by local frequency generator AD9854 and conventional chipset that the frequency that AD9854 produces is selected, and conventional peripheral discrete device is formed; Receive with delay circuit and mainly be formed by connecting by switch chip SA630, amplifier A06, wave filter SBP, frequency mixer JMS-1MH, amplifier Gali52, lag line and conventional peripheral components, switch chip SA630 has two, is connected with amplifier A06 input, output respectively; Synchronization control circuit mainly is made of EPM3256 and peripheral conventional discrete device, and it is transponder pulse signal (TP) and its inversion signal (NTP) that common property is given birth to 3 pulse signals, and presses earthwave gating pulse (TB); Power amplification and radiating circuit then mainly are made up of two-stage amplifier; Signal also primary circuit mainly is formed by connecting by amplifier, frequency mixer ADE-1ASK, switch control chip SA630 and wave filter.
The utility model produces 2 signals that frequency is different with the AD9854 chip, form output with FSK (frequency shift keying), after with an on-off circuit it being separated again, deliver to receiving unit and signal reduction assembly respectively, there is frequency difference thereby make between the receive frequency of transponder and the transmission frequency, and makes its frequency difference adjustable between 0.2--0.7Hz by computing machine.Because of this signal is an id signal that adds after this device receives radar signal, so we are easy to distinguish answer signal and marine echo, the geographic coordinate of transponder is known, so it can be used for calibrating the marine echo of same geographic coordinate.And, this device is placed on the signal that any old place in the search coverage of ground wave radar all can receive radar emission, and beams back the radar main website after can this signal amplifying.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is reception of the present utility model and delay circuit figure.
Fig. 3 is frequency source circuit figure of the present utility model.
Fig. 4 is a signal reduction circuit diagram of the present utility model.
Fig. 5 is amplification of the present utility model and radiating circuit figure.
Fig. 6 is synchronization control circuit figure of the present utility model.
Fig. 7 is the sequential relationship synoptic diagram of signal in the synchronization control circuit of the present utility model.
Embodiment
As shown in Figure 1, the high-frequency ground wave radar answering device that the utility model provides mainly comprises and receiving and delay circuit 1, synchronization control circuit 2, frequency source circuit 3, signal also primary circuit 4 and power amplification and radiating circuit 5, receive the high-frequency signal that is input as the radar main website with delay circuit 1, the delay line output of receiving circuit and signal also primary circuit 4 are connected; The signal of frequency source circuit 3 divides two-way output with the form of FSK, and one the tunnel receives and delay circuit 1, and another road connects also primary circuit 4 of signal; Also primary circuit 4, frequency source circuit 3 and amplification are connected with radiating circuit 5 with delay circuit 1, signal with reception respectively in three tunnel outputs of synchronization control circuit 2.With specific embodiment the utility model is elaborated below:
Receive with the delay circuit (see figure 2) and comprise: switch chip SA630 (T1, T3), amplifier A06 (T2), wave filter SBP (T4), frequency mixer JMS-1MH (T5), amplifier Gali52 (T6), 64 μ S lag line (T7) and peripheral circuits thereof.The high-frequency signal of being come in by antenna arrives 3 pin of switch S A630 (T1) through J1, this switch is controlled by TB (from synchronization control circuit), when TB is high level, the signal of input is exported from 8 pin of SA630 (T1), after giving the A06 amplification, through a switch S A630 (T3), from the 3 pin input of SA630 (T3), 8 pin are exported under the control of TB once more.Two switches here can make substantially to transmit and not enter into receiver.Be input to SBP (T4) filtering from the signal of T3 output, the signal of T4 output is input to JMS-1MH (T5) and local oscillation signal mixing mutually behind the attenuator that R3, R4, R5 form then, then the T5 output signal is delivered to delay line (T7) by Gali52 (T6) amplification behind C11, carries out the time-delay of 64 μ s.The output of last delay line meet a transformer T8 in case with the impedance matching of next circuit.
Frequency source circuit as shown in Figure 3, it mainly is formed by connecting by MAX232 (T9), 89C51 (T10), SN74HC245 (T11), SN74HC573 (T12), SN74HC125 (T13), local frequency generator AD9854 (T14) and wave filter PLP (T15), T14 is a master chip, adopt AD9854, can produce the signal of the required characteristic frequency of the utility model by it, the selection of its output frequency by computing machine by chip T9---T15 writes suitable control word to it and realizes.The concrete course of work can be described like this, by computer programming, through RS-232 interface---the J3 among Fig. 3, undertaken after the level conversion to 89C51 (T10) write data by T9 again, T10 then is connected to 1-8 pin and the 14-19 pin of AD9854 behind T11 data buffering, T12 address latch according to instruction, frequency control word and control command are delivered to T14, and the output signal of T14 is sent by J4 behind bandpass filter T15.Make it be operated in the duty of FSK by the frequency control word that AD9854 is set here, control 29 pin of AD9854 with the TP signal of synchronization control circuit generation, when 29 pin of T14 are low level, the output frequency of T14 is the frequency of frequency control word 1 correspondence of T14, when 29 pin of T14 are high level, the output frequency of T14 is the frequency of frequency control word 2 correspondences of T14, output local oscillator when 29 pin of T14 are high level is simultaneously given emitting module, and the output local oscillator when 29 pin of T14 are low level is given receiving unit.Make the carrier frequency that transmits and the carrier frequency of received signal differ 0.5Hz or other frequencies (between the 0.2-0.7Hz) by the frequency control word that T14 is set, thereby the FSK mode by this conversion local oscillation signal is implemented in the target echo signal of simulation and add an id signal.
Answer signal also primary circuit (see figure 4) comprises with Gali52 (T16, T17) being amplifying circuit, frequency mixer ADE-1ASK (T18), switch control chip SA630 (T19), the wave filter (T21) of main devices.The local oscillator amplification is finished by T17, the signal of AD9854 output is delivered to 1 pin of T17 among Fig. 3 through C34, amplifying the back sends from 3 pin, send T19 to be further divided into two-way through C36, the one road sends through C37 from 5 pin and to link to each other with 1 pin of frequency mixer T18, and one the road sends with JMS-1MH (T5 among Fig. 2) the receiving circuit from 8 pin and to link to each other, when the signal NTP of gauge tap when low, local oscillation signal is delivered to 1 pin of frequency mixer T18, and as the signal NTP of gauge tap when being high, local oscillation signal is delivered to 1 pin of the T5 in the receiver circuit.The signal of mixing output is sent after the bandpass filter T21 of back frequency-selecting from 5 pin and is taken out difference frequency signal, has promptly reduced received signal.Suppose that the signal frequency that the antenna of receiver takes in is f1, local frequency is F during reception, and local frequency is F+0.5Hz during reduction, and the frequency of going back primary circuit output is f2, promptly has the intermediate frequency of receiver output to be:
f＝F-f1＝4.43MHz
f2＝F+0.5-(F-f1)＝(f1+0.5)Hz
Power amplification and radiating circuit (as shown in Figure 5) comprise based on the two-stage amplifying circuit of A06 (T22), RF2317 (T23) with based on the emission control assembly of 9014 (T25, T26), A966 (T27), 9014 (T28, T29), A966 (T30), gating pulse is added to the b pin of T25 through R64, when pulse arrives, T25, T26, the equal conducting of T27, the 9V power supply is powered to T22 through T27, T22 has output, when pulse does not come, above-mentioned T25, T26, T27 all end, and T22 also no signal sends.
T22 and T23 amplify signal, T23 has adopted the RF2317 assembly, the signal of T22 output is delivered to 4 pin of T23 through C59, and the signal after T23 amplifies is sent from 13 pin, through the bandpass filter T24 of back after J10 delivers to the on-off circuit of duplexer goes.Here with the bias voltage of T28, T29, T30 control RF2317, when pulse when R68 is added to T28, T28, T29, the equal conducting of T30, the 12V power supply is powered to T23 through T30, T23 has output.When pulse did not come, above-mentioned T28, T29, T30 all ended, and T23 also no signal sends.
Synchronization control circuit is seen shown in Figure 6, and the T34 among the figure adopts the EPM3256 in the ALTER MAX3000 of the company family chip to design, and it produces three road pulse signals: transponder pulse (TP); Exomonental inversion signal (NTP); Press ground wave impulse (TB).Their oscillogram and sequential relationship are seen shown in Figure 7.When TP launches during for high level, TB receives during for high level.
Claims (7)
1. high-frequency ground wave radar answering device, it is characterized in that: device comprises reception and delay circuit, frequency source circuit, signal also primary circuit, power amplification and radiating circuit and synchronization control circuit at least, receive the high-frequency signal that is input as the radar main website with delay circuit, the delay line output of receiving circuit and signal also primary circuit are connected; The signal of frequency source circuit divides two-way output with the form of FSK, and one the tunnel receives and delay circuit, and another road connects also primary circuit of signal; Also primary circuit, frequency source circuit and power amplification are connected with radiating circuit with delay circuit, signal with reception respectively in three tunnel outputs of synchronization control circuit.
2. high-frequency ground wave radar answering device according to claim 1 is characterized in that: frequency source circuit is by local frequency generator AD9854 and conventional chipset that the frequency that AD9854 produces is selected, and conventional peripheral discrete device is formed.
3. high-frequency ground wave radar answering device according to claim 1 and 2, it is characterized in that: frequency source circuit mainly by MAX232,89C51, SN74H245, SN74HC573, SN74HC125, local frequency generator AD9854, and wave filter PLP chip be formed by connecting, AD9854 is a master chip.
4. high-frequency ground wave radar answering device according to claim 1 and 2, it is characterized in that: reception mainly is formed by connecting by switch chip SA630, amplifier A06, wave filter SBP, frequency mixer JMS-1MH, amplifier Gali52, lag line and conventional peripheral components with delay circuit, switch chip SA630 has two, is connected with amplifier A06 input, output respectively.
5. high-frequency ground wave radar answering device according to claim 1 and 2, it is characterized in that: synchronization control circuit mainly is made of EPM3256 and peripheral conventional discrete device, it is transponder pulse signal (TP) and its inversion signal (NTP) that common property is given birth to 3 pulse signals, and presses earthwave gating pulse (TB).
6. high-frequency ground wave radar answering device according to claim 1 and 2 is characterized in that: signal also primary circuit mainly is formed by connecting by amplifier, frequency mixer ADE-1ASK, switch control chip SA630 and wave filter.
7. high-frequency ground wave radar answering device according to claim 1 and 2 is characterized in that: power amplification and radiating circuit mainly are made up of the two-stage amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520095680 CN2775679Y (en) | 2005-03-29 | 2005-03-29 | High frequency ground wave radar responsing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520095680 CN2775679Y (en) | 2005-03-29 | 2005-03-29 | High frequency ground wave radar responsing device |
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| CN2775679Y true CN2775679Y (en) | 2006-04-26 |
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| CN 200520095680 Expired - Fee Related CN2775679Y (en) | 2005-03-29 | 2005-03-29 | High frequency ground wave radar responsing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959427A (en) * | 2010-07-16 | 2013-03-06 | 松下电器产业株式会社 | Radar device |
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2005
- 2005-03-29 CN CN 200520095680 patent/CN2775679Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959427A (en) * | 2010-07-16 | 2013-03-06 | 松下电器产业株式会社 | Radar device |
| US9097791B2 (en) | 2010-07-16 | 2015-08-04 | Panasonic Intellectual Property Management Co., Ltd. | Radar device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |