CN103593959B - A kind of change frame structure method of telemetering based on large capacity multiple connection, memory technology - Google Patents
A kind of change frame structure method of telemetering based on large capacity multiple connection, memory technology Download PDFInfo
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- CN103593959B CN103593959B CN201310526833.7A CN201310526833A CN103593959B CN 103593959 B CN103593959 B CN 103593959B CN 201310526833 A CN201310526833 A CN 201310526833A CN 103593959 B CN103593959 B CN 103593959B
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Abstract
A kind of change frame structure method of telemetering based on large capacity multiple connection, memory technology, the present invention includes signal conversion, data acquisition, multiple connection storage and four steps of framing output, wherein signal conversion comprises that physical quantity arrives the conversion of electric weight, the signal of telecommunication conversion to the signal of telecommunication, physical quantity to the conversion of electric weight by vibrating, impact, overload, noise, temperature, pressure sensor realize, the signal of telecommunication is realized by electric signal converter to the conversion of the signal of telecommunication; The collection of data acquisition settling signal, coding, realize the conversion of analog quantity to digital quantity; Multiple connection storing step carries out the data flow of multiple data acquisition equipment outputs to form unique data flow after multiple connection, and realizes data storage; Framing output be multiple connection memory device under the control of control signal, realize and become frame format output. The present invention has larger flexibility, can meet large capacity, high code check remote measurement demand, adapts to multiple different observing and controlling condition and changes.
Description
Technical field
The present invention relates to a kind of change frame structure method of telemetering based on large capacity multiple connection, memory technology, belong toTTC & DT Systems field.
Background technology
Telemetry system realize the isoparametric collection of electric weight on aircraft, vibration, impact, temperature and air pressure,The functions such as transmission, processing and storage, for aircraft test result analysis provides authentic data, are aircraftImprove design reliable basis is provided.
Along with the increase of aircraft complexity, the quantity of aircraft telemetry parameter is on the increase, and kind moreAdd variously, the data storage capacity to telemetry system and the channel capacity of real-time Transmission have proposed more and more higherRequirement.
In order to meet the requirement of large capacity, high code check storage and real-time Transmission, the method conventionally adopting has manyPoint is method, data compression method, data preprocessing method etc. frequently. Multifrequency point scheme is by increasing radio pointWay frequently increases remote measurement transmission channel, and channel capacity can be multiplied, but some increase frequently makes to flyElectromagnetic environment on row device is more complicated, in limited frequency range, increase too much point frequently can cause signal itBetween intersection disturb, when serious, can affect the normal reception on ground, multiple spot need to increase complete frequently in additionEquipment, the expansion of channel capacity is limited.
Data compression is that the telemetry after digitlization is compressed to processing, removes redundancy, dataCompression is divided into lossy compression method and Lossless Compression, because aircraft telemetry system requires the undistorted transmission of data,The general lossless compressiong that adopts. Data pretreatment is that telemetry is carried out to analyzing and processing, extracts featureParameter is transmitted. Data pretreating scheme can reduce the data volume of remote measurement transmission greatly, but can drawEnter latency issue, inapplicable in the time that requirement of real-time is higher. Because data pretreatment is to data characteristic spectrumAnalyze and transmit, thering is data irrecoverability.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, provide a kind of based on large capacityThe change frame structure method of telemetering of multiple connection, memory technology, carries out channel capacity expansion frequently by increasing wireless pointsOvercome the problem that data compression causes loss of data.
Technical solution of the present invention is:
A change frame structure method of telemetering based on large capacity multiple connection, memory technology, comprises that step is as follows:
(1) take remote measurement collection and the conversion of signal, according to the kind of telemetered signal and characteristic, is flyingRow device surface, structural member and equipment surface arrange that vibration, impact, overload, noise, temperature and pressure passSensor, realizes collection and the physical quantity of physical quantity and send to the conversion of electric weight and by the electric quantity signal after conversionEnter the equipment of gathering and editing in step (2), realize the collection of electric weight analog quantity simultaneously by electric signal converterAnd conversion formation telemetry data stream enters step (3);
(2) take remote measurement the gathering and editing of signal, the Synchronization Control of equipment in the output of multiple connection memory device of gathering and editingUnder the control of signal, each telemetered signal is sampled, the equipment of gathering and editing carry out digitlization place to sampled signalReason, the processing of encoding after digitlization, gathers and edits equipment by each telemetry after coding according to sampling firstRear order forms telemetry data stream, and control signal is by the gather and edit output of device data stream of ena-bung function controlThe speed of way and the equipment of gathering and editing output data;
(3) carry out data flow multiple connection storage, multiple connection memory device is by the step receiving (1) and step(2) telemetry data stream in carries out multiple connection and forms a data flow, and this data flow is stored to great RongAmount memory;
(4) carry out the output of data framing, multiple connection memory device under the control of control signal from data flowIn memory, export the data of different frame formats to wireless transmitting device and ground checkout equipment.
Sampling time interval in described step (2) meet sample frequency be greater than 2 times of signal frequency withOn.
Control signal in described step (4) can be sent by telecommand by ground, also can be by flyingThe program control transmission of other subsystems on device.
Synchronous control signal in described step (2) comprises enable signal and clock signal, enable signalControl whether output stream of corresponding sampler and coder, the gather and edit speed of equipment output stream of clock signal controlRate.
It is defeated that data framing output in described step (4) can change data under the control of control signalGo out the form of frame, change output by the prime frame length, subframe length and the synchronous code that change in frame formatThe form of frame meets different application demand.
It is by being wirelessly transmitted to wireless transmitting device that framing in described step (4) is exported a kind of mode,Realize telemetry real-time Transmission, another kind of mode is to transfer to ground checkout equipment by wired mode,Realize the ground retaking of a year or grade of storage data.
The present invention's beneficial effect is compared with prior art:
(1) the present invention adopts large capacity multiple connection memory technology, can overcome by increasing wireless points frequency etc.Mode is carried out the restriction of channel dilatation, increases the data capacity of telemetry system.
(2) the present invention can open or turn-off the defeated of a certain road sampler and coder data flow by control signalGo out, change sampler and coder to the message transmission rate between multiple connection memory, deposit thereby change enters multiple connectionThe total data capacity size of storage step, the method provides the implementation method that adapts to different telemetry amounts,Improve the utilization rate of channel.
(3) the present invention can change the output frame form of multiple connection memory by control signal, comprises masterFrame length, subframe length and synchronization character, adapt to the variation of total telemetry capacity by changing frame format, makeWireless telemetering message transmission rate adapts to the variation of telemetry capacity.
Brief description of the drawings
Fig. 1 is the inventive method flow chart;
Fig. 2 is control signal of the present invention and enable signal schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described in detail.
As shown in Figure 1, 2, the present invention relates to a kind of knot of the change frame based on large capacity multiple connection, memory technologyThe structure method of telemetering, has met wanting that the large capacity storage of telemetry system, the transmission of high code check and observing and controlling condition changeAsk, overcome the shortcoming of the methods such as multifrequency point, data compression, data pretreatment simultaneously. Of the present invention concreteStep is as follows:
(1) take remote measurement collection and the conversion of signal, telemetered signal is divided into two classes, and the first kind is according to distantSurvey kind and the characteristic of signal, arrange vibration in aircraft surface, structural member and equipment surface, impact,Overload, noise, temperature, pressure sensor, the range of sensor, certainty of measurement are according to measured parameterRequirement is selected, and sensor is realized the collection of physical quantity telemetered signal and the conversion that physical quantity arrives electric weightAnd being outputed to the equipment of gathering and editing, output electric weight meets general collection signal requirement, is generally+5V. PassSensor provides secondary power supply power supply by the equipment of gathering and editing.
Another kind of telemetered signal is electric weight analog signal, comprises equipment supply voltage, sampler and coder secondary power supplyOutput voltage, the duty signal of telecommunication of equipment, because the amplitude of such signal has 28V, 15V, 5VEtc. several different conditions, realize electric weight collection of simulant signal and convert forming remote measurement number by electric signal converterAccording to the multiple connection storage of sending in step (3), the content that converting electrical signal comprises two aspects, the one, signalThe conversion of amplitude, as signal amplitude unification is transformed into 5V, but is not limited to 5V, and the 2nd, by electricitySignal converter realize input signal and output signal ground between isolation, isolate passable by signal groundAvoid input signal to disturb and be loaded in output signal, the method that the isolation between signal ground adopts conventionally hasLight-coupled isolation method.
(2) take remote measurement the gathering and editing of signal. The equipment of gathering and editing receives the letter that enables of multiple connection memory device outputNumber and clock signal, the data flow of sampler and coder output is opened or closed to enable signal, clock signal providesThe equipment sampling trigger signal of gathering and editing, thus the number of the equipment output of gathering and editing changed by changing clock signal frequencyAccording to flow rate. The equipment of gathering and editing is realized the collection of multiple signals by time-multiplexed mode, time division multiplex is protectedZheng Mei road signal is equal interval sampling, and every road signal sampling time interval meets this road signal sampling frequency and wantsAsk, sampling time interval meets sample frequency and is greater than signal frequency more than 2 times. The equipment of gathering and editing is realized mouldPlan is measured the variation of digital quantity, and process comprises discrete sampling, quantification, three steps of coding, sample point itBetween the sampling time interval of distance You Gai road signal determine, quantize to realize analog quantity reflecting to digital quantityPenetrate, set up corresponding relation by continuous analog quantity with discrete digital quantity, coding adopts binary codingRepresent the digital quantity after discretization. Sampler and coder is spliced to form one according to the sequencing of sampling by each signalIndividual complete data flow is exported to multiple connection memory device under the control of synchronizing signal.
(3) carry out data multiplexing storage. Multiple connection memory device receives the data flow of multichannel sampler and coder output,Be input to the control signal control that the sampler and coder data flow of multiple connection memory device is exported by multiple connection memory device,Be input to the clock signal that the sampler and coder streaming rate of multiple connection memory device is exported by multiple connection memory deviceFREQUENCY CONTROL. By enable signal and the clock signal of control signal are set, can change and be input to multiple connectionThe data capacity size that memory device is total, meets the demand of different telemetry capacities. Multiple connection memory device is to manyCircuit-switched data stream carries out multiple connection, and multiple connection adopts time-multiplexed method. Data after multiple connection are stored to great RongAmount memory.
(4) carry out the output of data framing. Multiple connection memory device is under the control of control signal, and output is solidThe data flow of framing form, this frame format comprises the order layout of radio frequency channel road, prime frame length, the pair of telemetry parameterFrame length and synchronization character. The data flow of multiple connection memory device output can be the data after multiple connection, also canTo be that the mode according to first in first out reads from mass storage, when current observing and controlling condition meetsWhen real-time Transmission demand, get the data flow after straight multiple, pass when full when current observing and controlling condition is discontentedWhen defeated demand, get the data in mass storage. By control signal, can change multiple connection storage and establishThe frame format of standby output, this frame format comprises the order layout of radio frequency channel road, prime frame length, subframe length and synchronousWord. The control signal of Control signal frame conversion sends by two kinds of modes, and the one, sent by ground control stationTelecommand, the 2nd, by the program control transmission of other subsystems on aircraft.
The data flow of multiple connection memory device output is sent to wireless transmitting device, is back to by wireless transmissionGround, realizes telemetry real-time Transmission. When aircraft returns behind ground, the support of multiple connection memory device is logicalCross the data that the retaking of a year or grade of wired connection mode is stored.
The content not being described in detail in description of the present invention belongs to those skilled in the art's known technology.
Claims (6)
1. the change frame structure method of telemetering based on large capacity multiple connection, memory technology, is characterized in thatStep is as follows:
(1) take remote measurement collection and the conversion of signal, according to the kind of telemetered signal and characteristic, is flyingRow device surface, structural member surface and equipment surface are arranged vibration, impact, overload, noise, temperature and pressurePower sensor, realizes collection and the physical quantity of physical quantity and believes to the conversion of electric weight and by the electric weight after conversionNumber send into the equipment of gathering and editing in step (2), realize electric weight analog quantity by electric signal converter simultaneouslyGather and convert formation telemetry data stream and enter step (3);
(2) take remote measurement the gathering and editing of signal, the Synchronization Control of equipment in the output of multiple connection memory device of gathering and editingUnder the control of signal, each telemetered signal is sampled, the equipment of gathering and editing carry out digitlization place to sampled signalReason, the processing of encoding after digitlization, gathers and edits equipment by each telemetry after coding according to sampling firstRear order forms telemetry data stream, and control signal is by enabling to control the output way of device data stream of gathering and editingAnd the speed of the equipment output data of gathering and editing;
(3) carry out data flow multiple connection storage, multiple connection memory device is by the step receiving (1) and step(2) telemetry data stream in carries out multiple connection and forms a data flow, and this data flow is stored to great RongAmount memory;
(4) carry out the output of data framing, multiple connection memory device under the control of control signal from data flowIn memory, export the data of different frame formats to wireless transmitting device and ground checkout equipment.
2. a kind of change frame structure based on large capacity multiple connection, memory technology according to claim 1The method of telemetering, is characterized in that: it is large that the sampling time interval in described step (2) meets sample frequencyIn the more than 2 times of signal frequency.
3. a kind of change frame structure based on large capacity multiple connection, memory technology according to claim 1The method of telemetering, is characterized in that: the control signal in described step (4) can be referred to by remote control by groundOrder sends, also can be by the program control transmission of other subsystems on aircraft.
4. a kind of change frame structure based on large capacity multiple connection, memory technology according to claim 1The method of telemetering, is characterized in that: the synchronous control signal in described step (2) comprise enable signal andClock signal, enable signal control the is corresponding whether output stream of equipment of gathering and editing, clock signal control is gathered and editedThe speed of equipment output stream.
5. a kind of change frame structure based on large capacity multiple connection, memory technology according to claim 1The method of telemetering, is characterized in that: the data framing output in described step (4) is in the control of control signalThe lower form that can change frame data output of system, by changing prime frame length, the subframe length in frame formatThe form that changes output frame with synchronous code meets different application demand.
6. a kind of change frame structure based on large capacity multiple connection, memory technology according to claim 1The method of telemetering, is characterized in that: it is by wireless that the framing in described step (4) is exported a kind of modeTransfer to wireless transmitting device, realize telemetry real-time Transmission, another kind of mode is to pass through wired modeTransfer to ground checkout equipment, realize the ground retaking of a year or grade of storage data.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104102690B (en) * | 2014-05-26 | 2017-04-19 | 北京宇航系统工程研究所 | Storage structure based telemetry data processing method |
| CN104199324B (en) * | 2014-08-20 | 2017-02-15 | 中国运载火箭技术研究院 | Reliable switching method for multi-mode remote measurement |
| CN104639274B (en) * | 2014-12-31 | 2017-12-22 | 北京遥测技术研究所 | A kind of Multi target TT＆C method of TDMA networkings |
| CN105320177A (en) * | 2015-03-25 | 2016-02-10 | 北京国睿中数科技股份有限公司 | Temperature monitoring device |
| CN106157593A (en) * | 2016-07-07 | 2016-11-23 | 上海航天测控通信研究所 | A kind of telemetry system being applied to spacecrafts rendezvous |
| CN111045349B (en) * | 2018-10-15 | 2020-11-13 | 北京瑞航同达科技有限公司 | Dynamic framing method of telemetering mining and editing device |
| CN109445753B (en) * | 2018-10-17 | 2021-02-09 | 中国运载火箭技术研究院 | Data acquisition and active synchronous framing system based on interactive caching technology |
| CN110850758B (en) * | 2019-09-29 | 2021-06-11 | 北京航天长征飞行器研究所 | Telemetry system and method with configurable frame structure |
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