CN102004239A - Radar feeder standing wave protector - Google Patents
Radar feeder standing wave protector Download PDFInfo
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- CN102004239A CN102004239A CN 201010533667 CN201010533667A CN102004239A CN 102004239 A CN102004239 A CN 102004239A CN 201010533667 CN201010533667 CN 201010533667 CN 201010533667 A CN201010533667 A CN 201010533667A CN 102004239 A CN102004239 A CN 102004239A
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Abstract
The invention discloses a radar feeder standing wave protector, which belongs to the technical field of radars. The radar feeder standing wave protector comprises a digital signal processor (DSP) serving as a microcontroller, a band-pass filter, a detector, an amplifier, a benchmark, an electrically erasable read-only memory (EEROM), a crystal oscillator, a level translator, a latch, a driver, a sound-light alarm device and a power conversion unit, and also comprises a controller area network (CAN) interface module and a recommended standard-422 (RS422) interface. In work, a feeder standing wave ratio is calculated rapidly by taking the DSP as a core, so that a radar standing wave tiny change can be discovered timely, the work of a radar transmitter is stopped and sound and light alarm is performed; a standing wave ratio guard interval can be set flexibly through a CAN bus; a fault state can be reported to a monitoring station or the state is inquired and monitored through the monitoring station; therefore, the radar feeder standing wave protector is suitable for remote monitoring. In the radar feeder standing wave protector, the connection is relatively independent, the cost is relatively low, the guard interval is very convenient to modify, and circuits are highly simplified; and the radar feeder standing wave protector has expansibility in the radars of different model numbers.
Description
Technical field
The present invention relates to a kind of radar feeder line vswr protection device, belong to the Radar Technology field.
Background technology
The feeder system of radar is the important channel that transmits and receives the signal transmission, for centralized radar, because these signals all are high-power, so hard coaxial cable connected mode of many generally speaking employings, the feeder line of this syndeton is in the process of working long hours, the inevitable generation worn and torn or unusual fluctuation, thereby causes contacting bad; Perhaps have wet air or rainwater to enter feeder line under the situation that impermeability lost efficacy, these factors all can cause the standing-wave ratio (SWR) of feeder system to worsen, and it is big that reflective power becomes, and its junction even generation spark phenomenon will burn receiver when serious.
Existing most of vswr protection design is only carried out judgment processing according to the reflective power coupled signal; protection or warning when surpassing certain thresholding; because radar works in broadband at great majority; reason because of inband flatness; the output power difference of each frequency of transmitter is at some output power frequency on the low side, even feeder line standing-wave ratio (SWR) variation is beyond indication range; the absolute value of its reflective power also not necessarily surpasses alarm threshold, is easy to cause false dismissal.Chinese invention patent " a kind of novel integrated SWR measurement modular design method " (publication number: CN1553200A, open day: 2004-12-08) with " a kind of method and apparatus that detects antenna and feeder line connection status " (grant number: CN100568785C, authorize day: 2009-12-09), China's utility model patent " antenna feeder standing wave and power on-Line Monitor Device " (grant number: CN201251602Y, authorize day: 2009-06-03) with " wireless communications network base station antenna feeder standing-wave ratio (SWR) online testing device " (grant number: CN201096838Y, authorize day: 2008-08-06) disclosed, be onlinely to carry out test of antenna feeder standing wave or protection, all be applied to moving communicating field, do not consider the false-alarm problem that the outer interference of band can cause; The adaptability of product is not strong simultaneously, causes the difference of alarm threshold because different use objects can be subjected to the influence of factors such as individuality, environment, and foregoing invention or utility model all need to revise software program and can meet the demands.For the work position of radar, the common more complicated of electromagnetic environment, and mostly the radio frequency wave detector is broadband device can't suppress for the radar jamming signal of other near frequency band, so regular meeting causes false-alarm; The feeder system of different radars design simultaneously differs, its protection thresholding also can be different, therefore not only need the on-line testing convenience, also require to disturb outward by the wave filter inhibition zone, reduce false alarm rate, simultaneously alarm threshold be can adjust and preserve flexibly, and any software program and hardware circuit need not to change; In software, take measures such as look-up table and filtering, make the real-time of protection and accuracy higher; The application of acousto-optic device makes that the investigation of problem is more timely.
Summary of the invention
The present invention seeks to overcome the described deficiency of background technology; in field of radar; a kind of radar feeder line vswr protection device is provided; can in time find the little change of radar standing wave and stop radar transmitter work; pass through sound and light alarm simultaneously; remind the duty personnel to investigate rapidly, guarantee can in time recover radar system work.Reflect the performance change of feeder line with the standing-wave ratio (SWR) index, and guard interval can be set flexibly, can adjust alarm threshold in good time, need not to change any software program and hardware circuit, in different radars, have versatility.And malfunction can be reported control and monitor console or carry out status poll, supervision by control and monitor console, be fit to the strange land monitoring.
Technical scheme of the present invention is: a kind of radar feeder line vswr protection device comprises microcontroller DSP, wave detector, amplifier, benchmark, EEROM, crystal oscillator, level conversion, latch, driving, RS422 interface, charactron, acoustic-optic alarm and power conversion unit; It is characterized in that: also have bandpass filter, EEROM, CAN interface module; Its connecting mode is: with microcontroller DSP is core, DSP by its SPI interface and CAN interface respectively with peripheral components: crystal oscillator, amplifier, benchmark, level conversion, driving, EEROM, RS422 interface and CAN interface module are carried out communication link.
Aforesaid a kind of radar feeder line vswr protection device is characterized in that: described bandpass filter is to adopt the cavity body filter of low Insertion Loss, high inhibition degree.
Aforesaid a kind of radar feeder line vswr protection device is characterized in that: described EEROM adopts the serial EEPROM with 512 * 8, and is connected with DSP by the SPI interface.
Aforesaid a kind of radar feeder line vswr protection device, it is characterized in that: described CAN interface module also links to each other with the CAN bus, helps control and monitor console and carries out condition managing and control.
Principle of work of the present invention is: according to the overall applicability of radar system, pre-determine out the standing-wave ratio (SWR) guard interval, be loaded among the EEROM by the CAN bus together with the corrected parameter of different frequent points; By the A/D that DSP inside carries, coupling is come to the radar feeder line incoming signal and reflected signal are sampled, and go interference method to calculate and correction by software, and draw standing-wave ratio (SWR) fast by look-up table, and the result is shown on charactron; Determine whether to carry out sound and light alarm according to the protection value that is provided with among the EEROM, stop radar transmitter work simultaneously, and can malfunction be reported control and monitor console or carry out status poll, supervision by control and monitor console by the CAN bus.
The invention has the beneficial effects as follows:
1, with DSP is core, can calculates the feeder line standing-wave ratio (SWR) fast, can in time find the little change of radar standing wave and stop radar transmitter work;
2, by sound and light alarm, remind the duty personnel to investigate rapidly, guarantee can in time recover radar system, has greatly improved the reliability and the economic benefit of radar system;
3, can guard interval be set flexibly by the CAN bus, in different radars, have versatility, and can malfunction be reported control and monitor console or carry out status poll, supervision by control and monitor console, be fit to the strange land monitoring by the CAN bus;
4, the present invention's connection is more independent, and cost is lower, and the modification of guard interval is very convenient, has realized that the height of circuit is simplified, and has extendability in the radar of different model.
Description of drawings
Accompanying drawing 1 is an embodiment of the invention theory diagram;
Accompanying drawing 2 is the power conversion unit theory diagram;
Accompanying drawing 3 is the DSP main program flow chart;
Accompanying drawing 4 interrupts 1 service routine process flow diagram for DSP.
Embodiment
Below the contrast accompanying drawing further specifies the embodiment of the invention:
Each element in the accompanying drawings marking explanation and act on as follows:
1, microcontroller DSP: the TMS320LF2407APGEA that adopts TI company, it is integrated in one processing capability in real time and controller peripheral functionality, and have an A/D of 4 tunnel 10, the high speed Flash storer of 32K word, up to data/program RAM and 8 outputs of 16 pulse-width modulation PWMs, CAN interface and 5 external interrupt pins of 1.5K word, this makes it be specially adapted to applications such as Industry Control, access control.
2, in the accompanying drawing 1, storer EEROM: the X5043S8I that adopts Xicor company, it has 512 * 8 bit serial EEPROM, also be the programmable power management chip simultaneously, X5043S8I is connected with TMS320LF2407APGEA by the SPI interface, the standing-wave ratio (SWR) guard interval data of storage radar system and the corrected parameter of different frequent points; If need the data of storage many, can select the EEPROM of greater room.
3, CAN interface module: the SN65HVD230QD that adopts TI company, be mainly used to store the corrected parameter of standing-wave ratio (SWR) guard interval data and different frequent points, and can report malfunction to give control and monitor console or carry out status poll, supervision by the CAN interface module by control and monitor console; After powering on, receive the current working frequency that control and monitor console sends over by the CAN interface module, to read corresponding corrected parameter.
4, RS422 interface: adopt the AM26LV32INSR of TI company, give DSP after will converting single-ended signal to from the difference synchronizing signal that signal is handled extension set, as the synchronizing signal of sampling.
5, crystal oscillator: adopt the SG-8002JC-STC-4MHz of EPSON company, the frequency stability height provides work clock to DSP.
6, bandpass filter: adopt the cavity body filter of 13 of electronics, Insertion Loss is low, the outer inhibition degree height of band, and coupling is come to feeder line incoming signal and reflected signal carry out the clutter Filtering Processing.
7, wave detector: adopt inferior photoelectronic VMD-1A, detection sensitivity height, the detection linearity are good, can effectively the envelope signal in incoming signal and the reflected signal be extracted.
8, amplifier: adopt the AD8032AR of ADI company, export the 1dB saturation point up to 18dBm, gain 20dB, IP3 is 32dBm, can carry out good linear amplification to signal.
9, benchmark: adopt the REF196GS of ADI company, output accuracy height, good stability are for the sampling of DSP provides reference voltage.
10, level conversion: adopt the 74LV4245ADBR of TI company, the output level of DSP is converted to the TTL of 5V.
11, latch: adopt the 74LV373 of TI company, the demonstration control line of logarithmic code pipe latchs, multiplexing, thereby saves the mass data line.
12, in the accompanying drawing 2, input direct voltage+48V is converted to 5V voltage earlier by DC-DC transformer modular converter PP10-48-5, and then providing the voltage of 3.3V to DSP by integrated regulator LT1086IM-3.3, peripheral components all is operated in 3.3V basically, makes the power consumption of this plate very low.
With reference to accompanying drawing 1, the present invention includes microcontroller DSP, EEROM, CAN interface module, RS422 interface, bandpass filter, wave detector, amplifier, benchmark, crystal oscillator, level conversion, latch, driving, charactron, acoustic-optic alarm and power conversion unit.Consider frequency and wiring on the plate, adopted the 4MHz crystal oscillator, crystal oscillator provides work clock to DSP, and DSP carries out communication by SPI interface and CAN interface module and peripheral components respectively; Incoming signal and reflected signal that bandpass filter is come the feeder line coupling carry out Filtering Processing, the filtering noise signal; Wave detector extracts the envelope signal in incoming signal and the reflected signal; Amplifier is amplified to envelope signal the level amplitude of requirement; Benchmark provides reference voltage for the sampling of DSP; Level conversion converts the output level of DSP to the TTL of 5V; The control line of latch logarithmic code pipe latchs, multiplexing; Power conversion unit will become the required operating voltage of described each chip from the voltage transitions of radar power supply plug-in unit.
During work; at first by microcontroller DSP the corrected parameter of standing-wave ratio (SWR) guard interval data and different frequent points is downloaded among the storer EEROM through the CAN interface module; the back that powers on is read the data file among the storer EEROM in the register mode area that is placed on microcontroller DSP inside successively by microcontroller DSP, and the RS/422A interface will be given microcontroller DSP synchronizing signal as sampling after will converting single-ended signal from the difference synchronizing signal that signal is handled extension set to.After powering on, microcontroller DSP receives the current working frequency that control and monitor console sends over by the CAN interface module, to read corresponding corrected parameter.Microcontroller DSP carries out mould/number conversion by the A/D converter A/D module that carries to the coupled signal of incident and reflection; and carry out software and go interference method to calculate; revised according to current frequency simultaneously; and draw standing-wave ratio (SWR) fast by look-up table; after level conversion and the driving result is shown on charactron; microcontroller DSP determines whether to carry out sound and light alarm according to the protection value thresholding of reading among the storer EEROM, reports malfunction and stops radar transmitter work by the CAN interface module simultaneously.
With reference to accompanying drawing 2: be power conversion unit, constitute, DC/DC general+48V voltage transitions one-tenth+5V voltage by DC/DC and LDO; LDO after with DC/DC+5V voltage transitions one-tenth+3.3V voltage.
With reference to accompanying drawing 3 its master routine workflows are described: microcontroller DSP main program flow chart, during work, at first the pass interrupts carrying out initialization, by the SPI interface data of EEROM is read then to be placed in the internal register, opens interruption; Read the AD data in the buffer area, data are gone to disturb handle, then according to current frequency correction result, tabling look-up obtains standing-wave ratio (SWR) again; Judge whether fault according to thresholding,, afterwards result of calculation is carried out the LED demonstration if fault is then closed transmitter and carried out acousto-optic indication and state reports; Show EOP (end of program) if normally then only carry out LED.
4 explanation microcontroller DSP interrupt 1 service routine flow process with reference to accompanying drawing: when central broken hair is given birth to, at first preserve the scene, buffer status is preserved, close and interrupt; Judge then whether this interruption is that CAN interrupts, if not, judge whether again into XINT2 interrupts, if not recovery is returned behind the scene; If XIT2 interrupts, then carry out the AD sampling, and with data storage in buffer area; If CAN interrupts, continue to judge whether this CAN order is the data load order, if not, just as other command process, return behind the recovery scene then; If, with regard to loading data, promptly the Data Receiving that sends over by the CAN interface module in the internal register of DSP, and then write among the EEROM by the SPI interface, return behind the recovery scene afterwards.
It is pointed out that abovely to be not limited to the present invention only for embodiments of the invention, within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (4)
1. a radar feeder line vswr protection device comprises microcontroller DSP, wave detector, amplifier, benchmark, EEROM, crystal oscillator, level conversion, latch, driving, RS422 interface, charactron, acoustic-optic alarm and power conversion unit; It is characterized in that: also have bandpass filter, EEROM, CAN interface module; Its connecting mode is: with microcontroller DSP is core, DSP by its SPI interface and CAN interface respectively with peripheral components: crystal oscillator, amplifier, benchmark, level conversion, driving, EEROM, RS422 interface and CAN interface module are carried out communication link.
2. a kind of radar feeder line vswr protection device as claimed in claim 1 is characterized in that: described bandpass filter is to adopt the cavity body filter of low Insertion Loss, high inhibition degree.
3. a kind of radar feeder line vswr protection device as claimed in claim 1 is characterized in that: described EEROM adopts the serial EEPROM with 512 * 8, and is connected with DSP by the SPI interface.
4. a kind of radar feeder line vswr protection device as claimed in claim 1, it is characterized in that: described CAN interface module also links to each other with the CAN bus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010533667 CN102004239A (en) | 2010-11-06 | 2010-11-06 | Radar feeder standing wave protector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010533667 CN102004239A (en) | 2010-11-06 | 2010-11-06 | Radar feeder standing wave protector |
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| CN102004239A true CN102004239A (en) | 2011-04-06 |
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| CN 201010533667 Pending CN102004239A (en) | 2010-11-06 | 2010-11-06 | Radar feeder standing wave protector |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399306A (en) * | 2013-08-03 | 2013-11-20 | 张鹿平 | Method for reducing radar feed line loss and improving two-path feed line consistency |
| CN103532587A (en) * | 2013-10-24 | 2014-01-22 | 天津光电通信技术有限公司 | L-band RF system output port protection equipment |
| CN103743453A (en) * | 2014-01-14 | 2014-04-23 | 上海雄风自控工程有限公司 | Radar level meter system and control method thereof |
| CN103941247A (en) * | 2014-04-30 | 2014-07-23 | 上海航天电子通讯设备研究所 | Radar time sequence control system based on CAN bus |
| CN103954947A (en) * | 2014-05-19 | 2014-07-30 | 江苏万邦微电子有限公司 | T/R module debugging instrument fault detection method |
| CN107681900A (en) * | 2017-10-27 | 2018-02-09 | 中国航空无线电电子研究所 | The power supply of multimode output/impulse modulation conversion Multiplexing module |
| CN112285657A (en) * | 2020-10-26 | 2021-01-29 | 中国电子科技集团公司第三十八研究所 | Whole machine on-line switching control system of megawatt high-power radar transmitter |
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| CN2146088Y (en) * | 1992-09-02 | 1993-11-10 | 河南石油勘探局通信公司 | Power amplification protection alarm for radio station |
| JP2007147473A (en) * | 2005-11-29 | 2007-06-14 | New Japan Radio Co Ltd | Standing wave radar and distance measuring method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399306A (en) * | 2013-08-03 | 2013-11-20 | 张鹿平 | Method for reducing radar feed line loss and improving two-path feed line consistency |
| CN103532587A (en) * | 2013-10-24 | 2014-01-22 | 天津光电通信技术有限公司 | L-band RF system output port protection equipment |
| CN103532587B (en) * | 2013-10-24 | 2015-07-08 | 天津光电通信技术有限公司 | L-band RF system output port protection equipment |
| CN103743453A (en) * | 2014-01-14 | 2014-04-23 | 上海雄风自控工程有限公司 | Radar level meter system and control method thereof |
| CN103743453B (en) * | 2014-01-14 | 2016-08-24 | 上海雄风自控工程有限公司 | A kind of control method of radar level gauge system |
| CN103941247A (en) * | 2014-04-30 | 2014-07-23 | 上海航天电子通讯设备研究所 | Radar time sequence control system based on CAN bus |
| CN103941247B (en) * | 2014-04-30 | 2016-05-04 | 上海航天电子通讯设备研究所 | Radar sequential control system based on CAN bus |
| CN103954947A (en) * | 2014-05-19 | 2014-07-30 | 江苏万邦微电子有限公司 | T/R module debugging instrument fault detection method |
| CN103954947B (en) * | 2014-05-19 | 2016-07-06 | 江苏万邦微电子有限公司 | A kind of fault detection method of T/R assembly debugging instrument |
| CN107681900A (en) * | 2017-10-27 | 2018-02-09 | 中国航空无线电电子研究所 | The power supply of multimode output/impulse modulation conversion Multiplexing module |
| CN112285657A (en) * | 2020-10-26 | 2021-01-29 | 中国电子科技集团公司第三十八研究所 | Whole machine on-line switching control system of megawatt high-power radar transmitter |
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Application publication date: 20110406 |