CN109283527B - Portable warning radar - Google Patents
Portable warning radar Download PDFInfo
- Publication number
- CN109283527B CN109283527B CN201811498114.8A CN201811498114A CN109283527B CN 109283527 B CN109283527 B CN 109283527B CN 201811498114 A CN201811498114 A CN 201811498114A CN 109283527 B CN109283527 B CN 109283527B
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- 239000003990 capacitor Substances 0.000 claims abstract description 58
- 230000002159 abnormal effect Effects 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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
- 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
- G01S13/88—Radar or analogous systems specially adapted for specific applications
-
- 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
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a portable warning radar, which comprises a signal acquisition circuit, a frequency modulation calibration circuit and an operational amplifier output circuit, wherein the signal acquisition circuit acquires the frequency of a portable warning radar microwave signal, an LC filter circuit is formed by an inductor L1 and a capacitor C2 and then the signal is filtered and then is input into the frequency modulation calibration circuit, the frequency modulation calibration circuit is formed by an operational amplifier AR1, a resistor R1-a resistor R3 and a capacitor C3-a capacitor C5 and is used for carrying out frequency modulation processing on the signal, meanwhile, an operational amplifier AR1 is used for amplifying the signal in phase, and a triode Q3 and a triode Q4 are used for forming a composite switch circuit and filtering abnormal signals in the signal, wherein a triode Q2 and a triode Q1 feed back the signal to the operational amplifier AR1 to feed back and calibrate the output signal potential of the operational amplifier AR1, and finally the operational amplifier output circuit is used for carrying the portable warning radar microwave signal after amplifying the signal in phase by the operational amplifier AR2 and compensating the portable warning radar microwave signal in time.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a portable warning radar.
Background
The warning radar is divided into an air warning radar and a sea-going warning radar, and is used for finding and monitoring sea surfaces and air targets, judging the friend-foe properties of the targets by matching with a friend-foe identification system, providing target indication for missile guidance radar and gun aiming radar, and the like, wherein the portable warning radar realizes the effect of detecting targets by using a microwave signal feedback principle, but if the microwave signal frequency is interfered by other high-frequency signals, the microwave signal frequency hopping of the radar is caused, and the feedback signal power is insufficient, namely the portable warning radar is invalid.
The present invention provides a new solution to this problem.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention aims to provide the portable warning radar which has the characteristics of ingenious conception and humanized design, can calibrate the portable warning radar microwave signal in real time and can compensate the portable warning radar microwave signal in time.
The portable warning radar comprises a signal acquisition circuit, a frequency modulation calibration circuit and an operational amplifier output circuit, wherein the signal acquisition circuit acquires the frequency of a portable warning radar microwave signal, an LC filter circuit is formed by an inductor L1 and a capacitor C2 and then the signal is input into the frequency modulation calibration circuit, the frequency modulation calibration circuit performs frequency modulation processing on the signal by using an operational amplifier AR1, a resistor R1-a resistor R3 and a capacitor C3-a capacitor C5, meanwhile, the signal is amplified by using an operational amplifier AR1 in phase, an abnormal signal in the signal is filtered by using a triode Q3 and a triode Q4 to form a composite switch circuit, the output signal potential of the operational amplifier AR1 is fed back and calibrated by using a triode Q2, and finally the operational amplifier output circuit outputs the signal after the signal is amplified by using the operational amplifier AR2 in phase, so that the portable warning radar signal is a compensation signal;
the frequency modulation calibration circuit comprises a capacitor C3, one end of the capacitor C3 is connected with one end of a resistor R1, the other end of the capacitor C3 is connected with a resistor R2 and one end of a capacitor C4, the other end of the resistor R2 is connected with a base electrode of a triode Q3 and an output end of an operational amplifier AR1, one end of a resistor R5, a base electrode of a triode Q2 and an anode of a diode D2, the other end of the resistor R1 is connected with one end of the capacitor C5 and one end of the resistor R3, the other end of the resistor R3 is connected with an in-phase input end of the capacitor C4 and a collector electrode of the operational amplifier AR1, an emitter electrode of the triode Q1 is connected with one end of the resistor R4, the other end of the resistor R4 is connected with an emitter electrode of the triode Q2 and one end of the resistor R7, the other end of the resistor R7 is connected with the ground, and the other end of the triode Q4 is connected with an emitter electrode of the triode Q3 and a collector electrode of the triode Q4 is connected with a power supply V5.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1, a frequency modulation circuit is formed by using an operational amplifier AR1, a resistor R1-a resistor R3 and a capacitor C3-a capacitor C5 to carry out frequency modulation processing on signals, the charge and discharge properties of the capacitor C3 and the capacitor C4 are utilized, when signals are high-frequency signals, the capacitor C4 is charged, the signal frequency of the in-phase input end of the operational amplifier AR1 is reduced, when the signals are low-frequency signals, the capacitor C3 is discharged, the signal frequency of the in-phase input end of the operational amplifier AR1 is improved, the effect of calibrating the signal frequency is achieved, and signal frequency hopping is prevented;
2. the composite switch circuit is formed by the triode Q3 and the triode Q4 to filter abnormal signals in the signals, when the signals are abnormal low-level signals, the triode Q2 is conducted, feedback signals are fed into the in-phase input end of the operational amplifier AR1, the output signal potential of the frequency modulation calibration circuit is improved, when the signals are abnormal high-level signals, the triode Q1 is conducted, the feedback signals are fed into the reverse-phase input end of the operational amplifier AR1, the effect of calibrating the signal potential is achieved, and automatic calibration of the signals is achieved.
Drawings
FIG. 1 is a block diagram of a portable warning radar according to the present invention.
Fig. 2 is a schematic diagram of a portable warning radar according to the present invention.
Detailed Description
The foregoing and other features, aspects and advantages of the present invention will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying figures 1-2. The following embodiments are described in detail with reference to the drawings.
The portable warning radar comprises a signal acquisition circuit, a frequency modulation calibration circuit and an operational amplifier output circuit, wherein the signal acquisition circuit acquires the frequency of a portable warning radar microwave signal, an LC filter circuit is formed by an inductor L1 and a capacitor C2 and then the signal is input into the frequency modulation calibration circuit, the frequency modulation calibration circuit is formed by an operational amplifier AR1, a resistor R1-a resistor R3 and a capacitor C3-a capacitor C5 to carry out frequency modulation processing on the signal, meanwhile, an operational amplifier AR1 is used for amplifying the signal in phase, and an triode Q3 and a triode Q4 are used for forming a composite switch circuit to filter abnormal signals in the signal, wherein the triode Q2 and the triode Q1 feed back the signal to the operational amplifier AR1 to carry out feedback calibration on the output signal potential of the operational amplifier AR1, and finally the operational amplifier output circuit is used for amplifying the signal in phase by the operational amplifier AR2 and then outputting the signal, namely the compensation signal of the portable warning radar microwave signal;
the frequency modulation calibration circuit uses the frequency modulation circuit composed of the operational amplifier AR1, the resistor R1-the resistor R3 and the capacitor C3-the capacitor C5 to carry out frequency modulation processing on signals, utilizes the charge and discharge properties of the capacitor C3 and the capacitor C4, charges the capacitor C4 at the moment when the signals are high-frequency signals, reduces the signal frequency of the in-phase input end of the operational amplifier AR1, discharges the capacitor C3 when the signals are low-frequency signals, improves the signal frequency of the in-phase input end of the operational amplifier AR1, plays a role in calibrating the signal frequency, simultaneously uses the operational amplifier AR1 to amplify the signals in-phase to compensate the conduction loss of the signals, uses the triode Q3 and the triode Q4 to form a composite switch circuit to filter abnormal signals in the signals, uses the triode Q2 to conduct when the signals are abnormal low-level signals, feeds back the signals into the in-phase input end of the operational amplifier AR1, improves the signal potential output by the frequency modulation calibration circuit, when the signal is an abnormal high level signal, the triode Q1 is conducted, the feedback signal is fed into the inverting input end of the operational amplifier AR1 to play a role of calibrating signal potential, one end of the capacitor C3 is connected with one end of the resistor R1, the other end of the capacitor C3 is connected with one end of the resistor R2 and one end of the resistor R5, the other end of the resistor R2 is connected with the base electrode of the triode Q3 and the output end of the operational amplifier AR1, one end of the resistor R1 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with the other end of the capacitor C4 and the non-inverting input end of the operational amplifier AR1, the collector of the triode Q2, the other end of the capacitor C5 is connected with the base electrode of the triode Q1, the emitter of the triode Q1 is connected with one end of the resistor R4, the other end of the resistor R4 is connected with the inverting input end of the operational amplifier AR1 and the other end of the resistor R5, the negative electrode of the diode D2 is connected with the emitter of the triode Q2 and one end of a resistor R7 and the emitter of the triode Q4, the other end of the resistor R7 is grounded, the base electrode of the triode Q4 is connected with the emitter of the triode Q3, and the collector electrode of the triode Q4 and the collector electrode of the triode Q3 are connected with a power supply +5V.
In the second embodiment, on the basis of the first embodiment, the operational amplifier output circuit amplifies the signal in phase by using the operational amplifier AR2 and outputs the amplified signal, the conduction loss in the compensation signal is the compensation signal of the portable warning radar microwave signal, the in-phase input of the operational amplifier AR2 is connected with the collector of the triode Q4, the inverting input of the operational amplifier AR2 is connected with the resistor R6 and one end of the resistor R8, the other end of the resistor R6 is grounded, the other end of the resistor R8 is connected with the output end of the operational amplifier AR2, one end of the resistor R9 and the negative electrode of the voltage stabilizing tube D3, the positive electrode of the voltage stabilizing tube D3 is grounded, and the other end of the resistor R9 is connected with the signal output port.
Based on the first embodiment, the signal acquisition circuit selects a signal frequency acquisition device J1 with the model of SJ-ADC to acquire the microwave signal frequency of the portable warning radar, an LC filter circuit is formed by an inductor L1 and a capacitor C2 to be filtered and then input into a frequency modulation calibration circuit, clutter in signals is filtered, a power supply of the signal frequency acquisition device J1 is connected with a power supply +5V and one end of the capacitor C1, the ground of the signal frequency acquisition device J1 is grounded, an output end of the signal frequency acquisition device J1 is connected with the other end of the capacitor C1, the capacitor C2 and one end of the inductor L1, the other end of the capacitor C2 is grounded, the other end of the inductor L1 is connected with a negative electrode of a voltage stabilizing tube D1 and one end of the capacitor C3, and the positive electrode of the voltage stabilizing tube D1 is connected with a collector of the triode Q1.
The portable warning radar comprises a signal acquisition circuit, a frequency modulation calibration circuit and an operational amplifier output circuit, wherein the signal acquisition circuit acquires the frequency of a portable warning radar microwave signal, the portable warning radar microwave signal is filtered by an LC filter circuit formed by an inductor L1 and a capacitor C2 and then is input into the frequency modulation calibration circuit, the frequency modulation calibration circuit utilizes an operational amplifier AR1, a resistor R1-a resistor R3 and a capacitor C3-a capacitor C5 to form a frequency modulation circuit to carry out frequency modulation processing on the signal, when the signal is a high-frequency signal, the capacitor C3 and the capacitor C4 are utilized, the capacitor C4 is charged, the signal frequency of an in-phase input end of the operational amplifier AR1 is reduced, when the signal is a low-frequency signal, the capacitor C3 is discharged, the signal frequency of the in-phase input end of the operational amplifier AR1 is increased, the signal frequency of the operational amplifier AR1 is calibrated, meanwhile, the conduction loss of the signal is compensated by the operational amplifier AR1, when the signal is an abnormal signal in a low-level signal, the feedback signal is conducted by the triode Q3 and the triode Q4 forms an abnormal signal in the composite switch circuit, when the signal is an abnormal signal, the signal in the signal is the high-phase level signal is filtered by the operational amplifier, the amplifier is the in-phase amplifier circuit, and finally the signal is output as the signal is amplified by the in-phase of the carrier amplifier, and the signal is the in-phase signal, and the signal is output to the normal phase-phase signal is amplified by the high-phase amplifier.
While the invention has been described in connection with certain embodiments, it is not intended that the invention be limited thereto; for those skilled in the art to which the present invention pertains and the related art, on the premise of based on the technical scheme of the present invention, the expansion, the operation method and the data replacement should all fall within the protection scope of the present invention.
Claims (3)
1. The portable warning radar comprises a signal acquisition circuit, a frequency modulation calibration circuit and an operational amplifier output circuit, and is characterized in that the signal acquisition circuit acquires the frequency of a portable warning radar microwave signal, the portable warning radar microwave signal is filtered by an LC filter circuit formed by an inductor L1 and a capacitor C2 and then is input into the frequency modulation calibration circuit, the frequency modulation calibration circuit is used for carrying out frequency modulation processing on the signal by using an operational amplifier AR1, a resistor R1-resistor R3 and a capacitor C3-capacitor C5, meanwhile, the signal is amplified by using the operational amplifier AR1 in phase, abnormal signals in the signal are filtered by using a triode Q3 and a triode Q4 to form a composite switch circuit, the output signal potential of the operational amplifier AR1 is fed back and calibrated, and finally the operational amplifier output circuit is used for outputting the signal after amplifying the signal in phase by using the operational amplifier AR2, namely the signal is a compensation signal of the portable warning radar microwave signal;
the frequency modulation calibration circuit comprises a capacitor C3, one end of the capacitor C3 is connected with one end of a resistor R1, the other end of the capacitor C3 is connected with a resistor R2 and one end of a capacitor C4, the other end of the resistor R2 is connected with a base electrode of a triode Q3 and an output end of an operational amplifier AR1, one end of a resistor R5, a base electrode of a triode Q2 and an anode of a diode D2, the other end of the resistor R1 is connected with one end of the capacitor C5 and one end of the resistor R3, the other end of the resistor R3 is connected with an in-phase input end of the capacitor C4 and a collector electrode of the operational amplifier AR1, an emitter electrode of the triode Q1 is connected with one end of the resistor R4, the other end of the resistor R4 is connected with an emitter electrode of the triode Q2 and one end of the resistor R7, the other end of the resistor R7 is connected with the ground, and the other end of the triode Q4 is connected with an emitter electrode of the triode Q3 and a collector electrode of the triode Q4 is connected with a power supply V5.
2. The portable warning radar according to claim 1, wherein the operational amplifier output circuit includes an operational amplifier AR2, a non-inverting input of the operational amplifier AR2 is connected to a collector of the transistor Q4, an inverting input of the operational amplifier AR2 is connected to a resistor R6 and one end of a resistor R8, the other end of the resistor R6 is connected to ground, the other end of the resistor R8 is connected to an output end of the operational amplifier AR2, one end of the resistor R9 and a negative electrode of the voltage regulator tube D3, an anode of the voltage regulator tube D3 is connected to ground, and the other end of the resistor R9 is connected to a signal output port.
3. A portable warning radar according to claim 1, wherein the signal acquisition circuit includes a signal frequency acquisition device J1 of the type SJ-ADC, the power supply of the signal frequency acquisition device J1 is connected to the power supply +5v and one end of the capacitor C1, the ground of the signal frequency acquisition device J1 is grounded, the output of the signal frequency acquisition device J1 is connected to the other end of the capacitor C1, the capacitor C2 and one end of the inductor L1, the other end of the capacitor C2 is grounded, the other end of the inductor L1 is connected to the negative electrode of the voltage regulator D1 and one end of the capacitor C3, and the positive electrode of the voltage regulator D1 is connected to the collector of the transistor Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811498114.8A CN109283527B (en) | 2018-12-07 | 2018-12-07 | Portable warning radar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811498114.8A CN109283527B (en) | 2018-12-07 | 2018-12-07 | Portable warning radar |
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| CN109283527A CN109283527A (en) | 2019-01-29 |
| CN109283527B true CN109283527B (en) | 2023-09-15 |
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| CN201811498114.8A Active CN109283527B (en) | 2018-12-07 | 2018-12-07 | Portable warning radar |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109745635A (en) * | 2019-02-18 | 2019-05-14 | 河南中医药大学 | Ultrasonic signal processing device |
| CN109889458B (en) * | 2019-02-28 | 2021-12-28 | 深圳市信达珑丰科技有限公司 | Library information management system |
| CN110084073B (en) * | 2019-04-01 | 2020-01-24 | 郑州工程技术学院 | Computer security risk control system |
| CN110244678B (en) * | 2019-06-27 | 2020-05-05 | 河南鑫安利消防安全评价有限公司 | Industrial building fire safety assessment system |
| CN110658805B (en) * | 2019-09-30 | 2020-12-01 | 天津市盛丹电子技术发展有限公司 | Signal calibration circuit of industrial building fire-fighting system |
| CN111665385B (en) * | 2020-06-05 | 2021-03-19 | 华兴通信技术有限公司 | Communication base station safety monitoring device |
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| US9448301B2 (en) * | 2013-12-20 | 2016-09-20 | Delta Mobile Systems, Inc. | Calibrated radar apparatus and associated methods |
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