CN102175248A - Pulsar signal detector based on single event effect - Google Patents
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Abstract
基于单粒子效应的脉冲星信号探测器。它涉及数据处理技术领域，它解决了现有探测器低压力高真空、低温环境的支持的缺陷，探测面积过大的难题。它包括由M+1个寄存器单元组成寄存器单元阵列和由M个加法器组成加法器阵列；第一和第二寄存器单元输出端分别连第一加法器第一和第二输入端，第一加法器输出端连第二加法器第一输入端，第三寄存器单元输出端连第二加法器第二输入端，第一加法器进位输出端连第二加法器低位进位输入端，类推，第m加法器输出端连第m+1加法器第一输入端，第m+2寄存器单元输出端连第m+1加法器第二输入端，第m加法器进位输出端连第m+1加法器低位进位输入端，1＜m＜M；第M加法器输出端为最终结果输出端。应用于探测航天器导航的脉冲星信号。
Pulsar signal detector based on single event effect. It relates to the field of data processing technology, and it solves the problems of existing detectors such as low-pressure, high-vacuum, and low-temperature environment support and the problem of excessively large detection area. It includes a register unit array composed of M+1 register units and an adder array composed of M adders; the output terminals of the first and second register units are respectively connected to the first and second input terminals of the first adder, and the first addition The output end of the first adder is connected to the first input end of the second adder, the output end of the third register unit is connected to the second input end of the second adder, the carry output end of the first adder is connected to the low-order carry input end of the second adder, and so on, the mth The output terminal of the adder is connected to the first input terminal of the m+1th adder, the output terminal of the m+2th register unit is connected to the second input terminal of the m+1th adder, and the carry output terminal of the mth adder is connected to the m+1th adder The low-order carry input terminal, 1<m<M; the output terminal of the Mth adder is the final result output terminal. Applications to detect pulsar signals for spacecraft navigation.
Description
Technical field
The present invention relates to technical field of data processing, relate in particular to a kind of pulsar signal detector that is applied to the spacecraft navigation application.
Background technology
The single-particle inversion effect is caused by high energy proton in the space radiation environment and heavy ion that mainly the single-particle inversion that wherein mainly betides in memory device and the logical circuit takes place the most frequent.Single-particle inversion is that the electric charge that produces around the heavy ion motion track is collected by sensitive electrode, forms transient current, and the logical circuit that sets out causes the logic state upset.On the microprocessor that this phenomenon is found to work in spaceship and satellite the earliest and in the storage unit, single-particle makes some generation 0-1 upset mistake of processor or memory cell.High energy particle or other particle with suitable energy inject integrated circuit, and generally speaking, high-energy neutron, proton and photon can cause storage unit to be overturn.
GPS of America, the digital display circuit of spaceships such as TDRSS and MMS have all suffered bit-errors at random when space flight.Data shows at present, integrated circuit is when 1Kb is following, the single-particle inversion phenomenon is not obvious, and when integrated level during up to 4Kb, the single-particle inversion problem just can not be ignored, particularly when RAM is above up to 16Kb, possible a few minutes just can detect the influence that memory device has been subjected to single-particle, and along with the development of integrated circuit technology, the density of storage unit is increasing on the unit area, the volume of single storage unit is more and more littler, and is also more and more outstanding by the single-particle inversion problem.When the integrated technique that adopts the single-particle sensitivity, the single-particle inversion phenomenon of SRAM is just more obvious, and this just provides reliable theoretical basis for the design based on the pulsar signal detector of single particle effect.If can detect the upset influence that the pulse particle of pulsar radiation produces the integrated chip storage unit, or detect the variation of chip stored location mode, just this variation can be embodied on the detector.
At present the type of the pulsar signal detector that generally adopts mainly is gas ratio type, microchannel template, CCD semi-conductor type, scintillation detector, heat responsive type and solid-state semiconductor type or the like, and its principle all can be regarded the electric signal that the energy conversion with the pulsar ray photons becomes to be easy to measure as.Under the interaction of incident pulse astral ray and detector active material, produce photoelectron, produce pulse voltage in the electric current that forms through electric capacity and resistance by these photoelectricity.The size of pulse voltage is directly proportional with the energy of pulsar ray photons, need the support of low-pressure high vacuum, low temperature environment according to the detector of this principle design more, simultaneously also be faced with the excessive difficult problem of detection area, be difficult to satisfy the requirement that miniaturization, low-power consumption are used in the space.
Summary of the invention
The present invention needs the defective of the support of low-pressure high vacuum, low temperature environment in order to solve existing detector, the difficult problem that detection area is excessive, and pulsar signal detector based on single particle effect has been proposed.
Pulsar signal detector based on single particle effect comprises register cell array and adder array; The register cell array is made up of M+1 register cell, i.e. first register cell to the (M+1) register cell; Adder array is made up of M totalizer, i.e. first adder to the M totalizer; The output terminal of the output terminal of first register cell and second register cell is connected the first input end and second input end of first adder respectively, the output terminal of first adder connects the first input end of second adder, the output terminal of the 3rd register cell connects second input end of second adder, the carry output terminal of first adder connects the low level carry input of second adder, and the like, the output terminal of m totalizer connects the first input end of m+1 totalizer, the output terminal of m+2 register cell connects second input end of m+1 totalizer, the carry output terminal of m totalizer connects the low level carry input of m+1 totalizer, wherein 1＜m＜M; The output terminal of M totalizer is the net result output terminal.
As long as there is a register cell to capture single-particle in the detector of the present invention, then can form effective output, also just expression detects pulsar signal and occurs, and discerns according to the periodic characteristic that sort signal just can paired pulses star signal.
Because sensitive detection parts have certain threshold value requirement to the energy of single-particle, so the pulsar signal detector of the single particle effect The noise of can not being heated, only can be subjected to cosmic space particle The noise.Cosmic space noise particle current density approximately is 4-20ph/cm2/s, but this random noise can be rejected effectively by periodic characteristic identification.
When pulsar signal arrives the pulsar signal detector of single particle effect, the single-particle current density increases, the probability that single-particle is caught by the pulsar signal detector of single particle effect increases, register cell in the pulsar signal detector of single particle effect detects the part single-particle, and forming the output of single-particle counting, output valve has reflected the density of single-particle stream.When particle current density increased, increasing register cell captured single-particle, and the single-particle counting output value is also increasing, and state of saturation may occur.In this case, even single-particle direction and detector receiving plane normal bias are angled, detector equivalent received area reduces, and also has bigger single-particle counting output.If particle current density is enough big, the pulsar signal detector of single particle effect just can detect variation relation between single-particle stream and the detector receiving area, thereby can realize the detection of single-particle flow path direction.
The same with electrooptical device, when particle current density was moderate, the output and the particle flux direction of the pulsar signal detector of single particle effect presented cosine relation, and this cosine relation is by the decision of the characteristics of particle detection.Because detection probability is relevant with the area of storage sensitizing range, so cosine relation just described when receiving the plane with the particle flux direction when inconsistent, and equivalent area is the projection that the sensitizing range area is stored in detection.
Different with electrooptical device is, the pulsar signal detector of single particle effect is owing to there is register cell, its output can not change because of the disappearance of external particles stream, its output has reflected the rollover states of register cell single particle effect, have accumulation characteristics, can only be by the external control zero clearing.Therefore, the pulsar signal detector of single particle effect can also be realized the accumulating function of single-particle signal except that single-particle is surveyed.
The upset influence that the present invention utilizes the pulse particle of pulsar radiation that the integrated chip register cell is produced, or detect the variation of register cell state in the chip, and provide a kind of pulsar signal detector based on single particle effect, it adopts single particle effect that extensive device is produced flop phenomenon, broken away from traditional pulsar signal detector to high voltage, the constraint of particular job conditions such as infrabar.
The present invention has avoided complicated circuit and corresponding structure design, is easy to miniaturization, and high functional density is integrated, and has reduced design cost, and for AEROSPACE APPLICATION from now on, particularly the demand of deep space navigation has been established solid foundation.
Description of drawings
Fig. 1 is the structural representation based on the pulsar signal detector of single particle effect.
Embodiment
Embodiment one: in conjunction with Fig. 1 present embodiment is described, the pulsar signal detector based on single particle effect of present embodiment comprises register cell array 1 and adder array 2; Register cell array 1 is made up of M+1 register cell, and promptly first register cell 11 is to (M+1) register cell 1 (M+1); Adder array 2 is made up of M totalizer, and promptly first adder 21 is to M totalizer 1M; The output terminal of the output terminal of first register cell 11 and second register cell 12 is connected the first input end and second input end of first adder 21 respectively, the output terminal of first adder 21 connects the first input end of second adder 22, the output terminal of the 3rd register cell 13 connects second input end of second adder 22, the carry output terminal of first adder 21 connects the low level carry input of second adder 22, and the like, the output terminal of m totalizer 2m connects the first input end of m+1 totalizer 2 (m+1), the output terminal of m+2 register cell 1 (m+2) connects second input end of m+1 totalizer 2 (m+1), the carry output terminal of m totalizer 2m connects the low level carry input of m+1 totalizer 2 (m+1), wherein 1＜m＜M; The output terminal of M totalizer 1M is the net result output terminal, and net result is to add up and for this detector detects the quantity of single-particle inversion, i.e. the pulsar radiation dose surveyed of detector.
Register cell array 1 is the array that is formed by register cell, and register cell array 1 is used for the storing initial data, and each register cell is externally exported currency; First adder 21 is a full adder, 11 outputs of first register cell are exported as summand as addend, second register cell 12, the carry digit of low level is 0, above-mentioned three values are first adder 21 inputs, calculating and number and carry are designated as sum and Y for output, and the value of sum and the 3rd register cell 13 is as the addend and the summand of next stage totalizer (second adder 22), Y is the low level carry, and result calculated and carry and remaining register addition successively get to the end calculating output.When single particle effect takes place when, certain register in the register cell array 1 is overturned, data by " 1 " to " 0 ", or by " 0 " to " 1 ", be embodied in the output terminal output port of the pulsar signal detector of single particle effect after adding up by turn through adder array 2.
When initial data were 0, the output result after adding up was the number of single-particle inversion, if primary data is 1 o'clock, through the single-particle inversion number=register length-output data of the back calculating that adds up.
If the register cell capacity is N=2n, the register cell Capacity Selection is greater than the 16Kbytes scope; N is the figure place of adder array 2 afterbodies output, and then the number of the additive operation in the adder array 2 is 2n/2+2n/4+2n/8+ ... + n=N-n.
The pulsar signal detector of single particle effect is to utilize FPGA to design large stretch of register cell array, with the addition by turn of the process adder array of the value in the register cell array.Pulsar signal detector based on single particle effect carries out placement-and-routing in FPGA inside.That selected is the FPGA of the following SRAM type of 90nm technology, as the XC4VFX12FF668 of xilinx company.FPGA design occupancy is 70%-80%.The pulsar signal detector of this single particle effect can be real-time the situation of observation single-particle inversion, the result of single-particle inversion through combinational logic circuit walk wire delay after be reflected among the output result of adder array.And, can estimate that radiation effect is estimated the probability that single-particle inversion takes place to the influence of FPGA in this period by the measurement of single-particle inversion quantity in the unit interval.When the pulsar signal detector of single particle effect is installed in the diverse location of satellite, be used for estimating the direction of source radiation, thereby judge the directions of rays of some pulsar emission, the position of resolving spacecraft is for the spacecraft based on pulsar navigation provides navigation data.
Content of the present invention is not limited only to the content of the respective embodiments described above, and the combination of one of them or several embodiments equally also can realize the purpose of inventing.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104809338A (en) * | 2015-04-16 | 2015-07-29 | 北京空间飞行器总体设计部 | Satellite in orbit space-environment-influence early warning method based on correlation relationship |
| CN105790755A (en) * | 2016-02-26 | 2016-07-20 | 北京时代民芯科技有限公司 | Single-particle reinforced programmable user register circuit |
| CN108106667A (en) * | 2017-12-15 | 2018-06-01 | 北京卫星环境工程研究所 | Geostationary orbit space environment and the integrated detection device of effect |
| CN109041310A (en) * | 2017-06-12 | 2018-12-18 | 佛山市顺德区美的电热电器制造有限公司 | The treating method and apparatus of electromagnetic heating system and its PPG signal |
| CN111189445A (en) * | 2020-01-14 | 2020-05-22 | 哈尔滨工业大学 | A Pulsar Identification Method Based on Stochastic Resonance |
| CN111766497A (en) * | 2020-07-28 | 2020-10-13 | 哈尔滨工业大学 | A high-precision weak transient current testing system and method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104809338A (en) * | 2015-04-16 | 2015-07-29 | 北京空间飞行器总体设计部 | Satellite in orbit space-environment-influence early warning method based on correlation relationship |
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| CN105790755A (en) * | 2016-02-26 | 2016-07-20 | 北京时代民芯科技有限公司 | Single-particle reinforced programmable user register circuit |
| CN105790755B (en) * | 2016-02-26 | 2018-11-06 | 北京时代民芯科技有限公司 | A kind of programmable user register circuit that single-particle is reinforced |
| CN109041310A (en) * | 2017-06-12 | 2018-12-18 | 佛山市顺德区美的电热电器制造有限公司 | The treating method and apparatus of electromagnetic heating system and its PPG signal |
| CN108106667A (en) * | 2017-12-15 | 2018-06-01 | 北京卫星环境工程研究所 | Geostationary orbit space environment and the integrated detection device of effect |
| CN111189445A (en) * | 2020-01-14 | 2020-05-22 | 哈尔滨工业大学 | A Pulsar Identification Method Based on Stochastic Resonance |
| CN111766497A (en) * | 2020-07-28 | 2020-10-13 | 哈尔滨工业大学 | A high-precision weak transient current testing system and method |
| CN111766497B (en) * | 2020-07-28 | 2023-01-17 | 哈尔滨工业大学 | A high-precision weak transient current testing system and method |
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Application publication date: 20110907 |