CN103984401B - A kind of embedded space computer single event latch-up is monitored the most in real time and releases device - Google Patents
A kind of embedded space computer single event latch-up is monitored the most in real time and releases device Download PDFInfo
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- CN103984401B CN103984401B CN201410206383.8A CN201410206383A CN103984401B CN 103984401 B CN103984401 B CN 103984401B CN 201410206383 A CN201410206383 A CN 201410206383A CN 103984401 B CN103984401 B CN 103984401B
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Abstract
The invention discloses a kind of embedded space computer single event latch-up monitor the most in real time and release device, process circuit, SEL telemetered signal, subregion CPU5, hysteresis comparator, SEL releasing drive circuit and electronic switching device 8 including SEL state signal collecting circuit, SEL status signal.Present invention achieves the monitoring in real time to space computer single event latch-up and control; when there is single event latch-up in space in space computer; quick positioning latch region can be come by subregion CPU; drive circuit and electronic switching device is released by controlling SEL; disconnect this latched areas to power; protection device and track are not damaged because of breech lock, can recover the normal power supply in this region simultaneously.During recovering normal work, only make the partial function of space computer temporarily can not use, do not interfere with other modules of space computer, its impact is down to minimum.
Description
Technical field
The invention belongs to embedded space computer single event latch-up technical field, relate to a kind of embedded sky
Between computer single event latch-up monitor the most in real time and release device.
Background technology
The commonly used resistance of space computer single event latch-up or the method for current limiter subregion current limliting at present,
When space computer power supply zone generation single event latch-up, prevent super-high-current from burning device and power supply
Circuit, limits current in a certain safety range.After single event latch-up, release method is commonly used logical
Cross relay and disconnect the power supply of unit product.Current this single event latch-up protective measure, the most talented product
Could find during dysfunction, real-time extreme difference, easily in the case of single event latch-up, because of excessive electricity
The stream time is oversize burns product.
In the Chinese invention patent of Application No. 200710118543.3, it is disclosed that the prison of a kind of plate level
Survey and release method, be controlled by combinational logic circuit.There is once a kind of power supply and power in the method
Device generation single event latch-up, other power supplies can be disconnected, the impact brought to system is bigger.
On the other hand, in this patent of invention, cause the big electric current caused for electrical short if as other reasons,
Short circuit power supply can be caused ceaselessly to power on/off, be in oscillatory regime.And once launch at spacecraft,
Ground will be unable to be controlled this partial circuit.
Summary of the invention
Present invention solves the problem in that a kind of embedded space computer single event latch-up of offer is the most real-time
Monitoring and releasing device, to solve the defect that space computer single event latch-up can not be monitored in real time, from
And avoid bringing infringement to product.
The present invention is to be achieved through the following technical solutions:
A kind of embedded space computer single event latch-up is monitored the most in real time and releases device, including:
SEL state signal collecting circuit, monitors the size of current of coupled power supply zone, and will
The current signal monitored is converted into voltage signal, voltage signal is also sent to SEL status signal and processes
Circuit；
SEL status signal processes circuit, is amplified the voltage signal received processing, and will amplify
Voltage signal after process is sent respectively to SEL telemetered signal receiver module and hysteresis comparator；
The signal received is sent out by subregion CPU, SEL telemetered signal receiver module as SEL telemetered signal
Give subregion CPU, subregion CPU and monitor single event latch-up signal in real time, produce single event latch-up letter
Number time to SEL release drive circuit send turn off electronic switching device control signal；Sending pass power-off
After the control signal of sub-switching device, subregion CPU starts intervalometer, to SEL after fixed time intervals T1
Release drive circuit and send control signal, reopen electronic switching device, recover the power supply to load；
Hysteresis comparator, compares the voltage signal received with threshold voltage, when the voltage received
When signal is more than the threshold voltage set, then releases drive circuit to SEL and send shutoff electronic switching device
Control signal；
SEL releases drive circuit, receives subregion CPU or the control signal of hysteresis comparator output,
Drive disconnection or the Guan Bi of electronic switching device；
Electronic switching device, is connected on power supply zone and between it loads, turns off or connect power supply zone
Power supply to load.
The threshold voltage of described hysteresis comparator is that the rated operational current size institute according to power supply zone is right
The voltage swing answered sets.
When power supply zone output services electric current is more than latch-up current threshold value, SEL state signal collecting circuit
The voltage signal collected is electric with the threshold value of hysteresis comparator after SEL status signal process circuit amplifies
Relatively, hysteresis comparator exports high level according to comparative result to pressure ratio, and exported control signal controls SEL and solves
Except drive circuit disconnect electronic switching device so that power supply zone give load for electrically disconnected；
Simultaneously, the voltage letter after SEL status signal is processed the amplification that circuit sends by subregion CPU
Number as SEL telemetered signal receive, subregion CPU is after receiving breech lock telemetered signal, it is judged that single-particle
Latch-up signal produces, and the control signal also sending shutoff electronic switching device releases drive circuit to SEL.
Described after the interval T1 time restarts the electronic switching device recovery power supply to load, if single-particle
Breech lock releases not yet, and hysteresis comparator still sends the control signal of high level, and subregion CPU is according to sentencing generation
Single event latch-up signal, hysteresis comparator or subregion CPU send the letter again turning off electronic switching device
Number；Subregion CPU is again started up intervalometer, releases drive circuit to SEL and send out after fixed time intervals T2
Send control signal, T2 > T1, reopen electronic switching device, again recover the power supply to load.
Described subregion CPU also record produce single event latch-up signal number of times, if continuous several times open/
The operation turning off electronic switching device all fails normally to recover the power supply of load, then subregion CPU sends this confession
The signal that electricity region is short-circuited.
Compared with prior art, the present invention has a following useful technique effect:
The embedded space computer single event latch-up that the present invention provides is monitored the most in real time and releases device,
Achieve the monitoring in real time to space computer single event latch-up and control, when space computer is in space
When there is single event latch-up, quick positioning latch region can be come by subregion CPU, by controlling SEL
Releasing drive circuit and electronic switching device, disconnect this latched areas and power, protection device and track are not
Because breech lock is damaged, the normal power supply in this region can be recovered simultaneously.In the process recovering normal work
In, only make the partial function of space computer temporarily can not use, do not interfere with its of space computer
His module, for spacecraft system, is down to minimum by its impact.
The embedded space computer single event latch-up that the present invention provides is monitored the most in real time and releases device,
When subregion CPU judges to send short circuit, release drive circuit to electronic cutting by subregion CPU, SEL
Close the control of device so that it is remain off-position, it is to avoid the power supply area being short-circuited is to other
The impact in region, it is to avoid turn off the electric power system of unit.And in prior art after judging to be short-circuited,
The operation of existing employing is off the electric power system of unit；Make to be broken by unit during single event latch-up releases
Electricity is changed into single power supply zone power-off, is down to minimum by the negative effect brought to system, it is to avoid gives and produces
Product bring infringement.
The embedded space computer single event latch-up that the present invention provides is monitored the most in real time and releases device,
Telecommand can also can be sent to subregion CPU to power supply zone by ground after spacecraft is launched
Remotely control.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the present invention.
Wherein, 1, power supply zone；2, SEL state signal collecting circuit；3, at SEL status signal
Reason circuit；4, SEL telemetered signal receiver module；5, subregion CPU；6, hysteresis comparator；7、SEL
Release drive circuit；8, electronic switching device；9, load.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, described in be to the present invention
Explanation rather than restriction.
Seeing Fig. 1, device is monitored and released to embedded space computer single event latch-up the most in real time, bag
Include:
SEL state signal collecting circuit 2, monitors the size of current of coupled power supply zone 1,
And the current signal monitored is converted into voltage signal, also voltage signal is sent to SEL status signal
Process circuit 3；
SEL status signal processes circuit 3, is amplified the voltage signal received processing, and will put
Voltage signal after big process is sent respectively to SEL telemetered signal receiver module 4 and hysteresis comparator 6；
The signal received is believed by subregion CPU5, SEL telemetered signal receiver module 4 as SEL remote measurement
Number being sent to subregion CPU5, subregion CPU monitors single event latch-up signal in real time, is producing single-particle door bolt
Release drive circuit 7 to SEL during lock signal and send the control signal of shutoff electronic switching device 8；Sending out
After going out to turn off the control signal of electronic switching device 8, subregion CPU5 starts intervalometer, when interval is fixing
Between release drive circuit 7 to SEL after T1 and send control signal, reopen electronic switching device 8,
Recover the power supply to load 9；
Hysteresis comparator 6, compares the voltage signal received with threshold voltage, when the electricity received
When pressure signal is more than the threshold voltage set, then releases drive circuit 7 to SEL and send shutoff electrical switch
The control signal of device 8；
SEL releases drive circuit 7, receives subregion CPU5 or the control of hysteresis comparator 6 output
Signal, drives disconnection or the Guan Bi of electronic switching device 8；
Electronic switching device 8, is connected on power supply zone 1 and it loads between 9, turns off or connects confession
The power supply to load 9 of the electricity subregion 1.
When power supply zone output services electric current is more than latch-up current threshold value, SEL state signal collecting circuit
The voltage signal collected is electric with the threshold value of hysteresis comparator after SEL status signal process circuit amplifies
Relatively, hysteresis comparator exports high level according to comparative result to pressure ratio, and exported control signal controls SEL and solves
Except drive circuit disconnect electronic switching device so that power supply zone give load for electrically disconnected；
Simultaneously, the voltage letter after SEL status signal is processed the amplification that circuit sends by subregion CPU
Number as SEL telemetered signal receive, subregion CPU is after receiving breech lock telemetered signal, it is judged that single-particle
Latch-up signal produces, and the control signal also sending shutoff electronic switching device releases drive circuit to SEL.
After the interval T1 time restarts the electronic switching device recovery power supply to load, if single event latch-up
Releasing not yet, hysteresis comparator still sends the control signal of high level, and subregion CPU is according to sentencing generation simple grain
Sub-latch-up signal, hysteresis comparator or subregion CPU send the signal again turning off electronic switching device；Point
District CPU is again started up intervalometer, releases drive circuit to SEL and send control after fixed time intervals T2
Signal, T2 > T1, reopen electronic switching device, again recover the power supply to load.
Subregion CPU also records the number of times producing single event latch-up signal, if continuous several times is turned on/off
The operation of electronic switching device all fails normally to recover the power supply of load, then subregion CPU sends this service area
The signal that territory is short-circuited.
The threshold voltage of described hysteresis comparator is that the rated operational current size institute according to power supply zone is right
The voltage swing answered sets.Such as, power supply zone running current is 200mA, arranges breech lock
Threshold current is 400mA.When this power supply zone electric current is more than 400mA, single event latch-up is independently real
Time monitoring and release device monitoring to over-current signal, have turned off this switched-mode power supply.After elapsed time T1,
Power up again to this power supply zone.
Concrete work process is as follows:
After power supply zone 1 powers on, SEL state signal collecting circuit 2 starts to monitor this power supply zone 1
Size of current.SEL state signal collecting circuit 2 is connected to after current signal is converted into voltage signal
SEL status signal processes circuit 3 and is amplified processing.It is distant that the signal processed is sent respectively to SEL
Survey signal receiving module 4, and the positive input terminal of hysteresis comparator 6.Hysteresis comparator 6 is according to power supply
Subregion 1 rated operational current size, is provided with the threshold value electricity corresponding to single event latch-up threshold current size
Pressure.When power supply zone 1 output services electric current is more than latch-up current threshold value, SEL state signal collecting electricity
The voltage signal that road 2 collects through SEL status signal process circuit 3 amplify after with hysteresis comparator 6
Threshold voltage compares, and makes hysteresis comparator 6 export high level, controls SEL releasing drive circuit 7 and disconnects
Electronic switching device 8 so that power supply zone 1 give load 9 for electrically disconnected.Simultaneously, SEL shape
Voltage signal after state signal processing circuit 3 will be amplified is sent to subregion CPU as SEL telemetered signal
5, subregion CPU5 receive breech lock telemetered signal judge single event latch-up signal produce after, also send pass
The control signal of disconnected electronic switching device 8 releases drive circuit 7 to SEL.Turning off electronic switching device
After 8, CPU5 starts intervalometer, fixed time intervals T1, is instructed by transmission, reopens former door bolt
Lock block supply.
If single event latch-up releases not yet, subregion CPU will collect SEL telemetered signal for the second time,
And after again turning off electronic switching device 8, fixed time intervals T2 (T2 > T1), it is again turned on supplying
Electric switch.If continuous three times (or repeatedly) all fail normally to restore electricity, it is likely that for this power supply
Region is short-circuited.
When so space computer occurs single event latch-up in space, quickly can be determined by CPU5
Position latched areas, by control device, disconnect this latched areas and power, protection device and track not because of
Breech lock is damaged, and can recover the normal power supply in this region simultaneously.During recovering normal work,
The partial function only making space computer temporarily can not use, and does not interferes with other moulds of space computer
Block, for spacecraft system, is down to minimum by its impact.
After judging to be short-circuited, the operation of existing employing is off the electric power system of unit；And the present invention
The drive circuit control to electronic switching device is released so that it is remain by subregion CPU, SEL
Off-position, it is to avoid the power supply area the being short-circuited impact on other regions, it is to avoid shutoff unit
Electric power system.After spacecraft is launched, telecommand can be sent by ground, be turned on and off supplying
The power supply of electricity subregion 1.
The specific embodiment that the present invention is lifted is only the annotation to this spirit, technical field
The specific embodiment described can be modified by technical staff or similar method substitutes, without departing from this
The spirit of invention.
Claims (4)
1. embedded space computer single event latch-up is monitored the most in real time and releases a device, its feature
It is, including:
SEL state signal collecting circuit, monitors the size of current of coupled power supply zone, and will
The current signal monitored is converted into voltage signal, voltage signal is also sent to SEL status signal and processes
Circuit；
SEL status signal processes circuit, is amplified the voltage signal received processing, and will amplify
Voltage signal after process is sent respectively to SEL telemetered signal receiver module and hysteresis comparator；
The signal received is sent out by subregion CPU, SEL telemetered signal receiver module as SEL telemetered signal
Give subregion CPU, subregion CPU and monitor single event latch-up signal in real time, produce single event latch-up letter
Number time to SEL release drive circuit send turn off electronic switching device control signal；Sending pass power-off
After the control signal of sub-switching device, subregion CPU starts intervalometer, to SEL after fixed time intervals T1
Release drive circuit and send control signal, reopen electronic switching device, recover the power supply to load；
Hysteresis comparator, compares the voltage signal received with threshold voltage, when the voltage received
When signal is more than the threshold voltage set, then releases drive circuit to SEL and send shutoff electronic switching device
Control signal；
SEL releases drive circuit, receives subregion CPU or the control signal of hysteresis comparator output,
Drive disconnection or the Guan Bi of electronic switching device；
Electronic switching device, is connected on power supply zone and between it loads, turns off or connect power supply zone
Power supply to load；
When power supply zone output services electric current is more than latch-up current threshold value, SEL state signal collecting circuit
The voltage signal collected is electric with the threshold value of hysteresis comparator after SEL status signal process circuit amplifies
Relatively, hysteresis comparator exports high level according to comparative result to pressure ratio, and exported control signal controls SEL and solves
Except drive circuit disconnect electronic switching device so that power supply zone give load for electrically disconnected；
Simultaneously, the voltage letter after SEL status signal is processed the amplification that circuit sends by subregion CPU
Number as SEL telemetered signal receive, subregion CPU is after receiving breech lock telemetered signal, it is judged that single-particle
Latch-up signal produces, and the control signal also sending shutoff electronic switching device releases drive circuit to SEL.
Embedded space computer single event latch-up the most as claimed in claim 1 is monitored the most in real time and is solved
Except device, it is characterised in that the threshold voltage of described hysteresis comparator is specified according to power supply zone
Voltage swing corresponding to operating current size sets.
Embedded space computer single event latch-up the most as claimed in claim 1 is monitored the most in real time and is solved
Except device, it is characterised in that restart electronic switching device in the interval T1 time and recover the power supply to load
After, if single event latch-up releases not yet, hysteresis comparator still sends the control signal of high level, subregion CPU
Control signal according to high level judges to produce single event latch-up signal, and hysteresis comparator or subregion CPU send out
Go out again to turn off the signal of electronic switching device；Subregion CPU is again started up intervalometer, fixed time intervals
Release drive circuit to SEL after T2 and send control signal, T2 > T1, reopen electronic switching device,
Again recover the power supply to load.
4. the embedded space computer single event latch-up as described in claim 1 or 3 is monitored the most in real time
With releasing device, it is characterised in that subregion CPU also records the number of times producing single event latch-up signal, as
Really continuous several times is turned on/off the operation of electronic switching device and all fails normally to recover the power supply of load, then divide
District CPU sends the signal that this power supply zone is short-circuited.
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| CN201410206383.8A CN103984401B (en) | 2014-05-15 | 2014-05-15 | A kind of embedded space computer single event latch-up is monitored the most in real time and releases device |
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| CN201410206383.8A CN103984401B (en) | 2014-05-15 | 2014-05-15 | A kind of embedded space computer single event latch-up is monitored the most in real time and releases device |
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| CN103984401B true CN103984401B (en) | 2016-08-24 |
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| CN107134758B (en) * | 2017-05-08 | 2019-02-22 | 哈尔滨工业大学 | Cmos device single event latch-up effect protective device under a kind of space environment |
| CN110492431B (en) * | 2019-08-29 | 2021-05-11 | 中国科学院近代物理研究所 | Single-particle latch-up protection device and latch-up release method of charge measurement chip |
| CN111679937B (en) * | 2020-06-01 | 2023-02-24 | 西安微电子技术研究所 | Single event lock release method based on local potential collapse |
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| US5672918A (en) * | 1994-08-18 | 1997-09-30 | The United States Of America As Represented By The United States Department Of Energy | System level latchup mitigation for single event and transient radiation effects on electronics |
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| CN1760676A (en) * | 2004-10-14 | 2006-04-19 | 中国科学院空间科学与应用研究中心 | A kind of detector and method that detects capability of microprocessor for anti event of single particle |
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| CN101471562A (en) * | 2007-12-28 | 2009-07-01 | 中国航天科技集团公司第五研究院第五一〇研究所 | Protective circuit for locking single particle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5672918A (en) * | 1994-08-18 | 1997-09-30 | The United States Of America As Represented By The United States Department Of Energy | System level latchup mitigation for single event and transient radiation effects on electronics |
| US6064555A (en) * | 1997-02-25 | 2000-05-16 | Czajkowski; David | Radiation induced single event latchup protection and recovery of integrated circuits |
| CN1760676A (en) * | 2004-10-14 | 2006-04-19 | 中国科学院空间科学与应用研究中心 | A kind of detector and method that detects capability of microprocessor for anti event of single particle |
| CN101196837A (en) * | 2007-12-26 | 2008-06-11 | 北京时代民芯科技有限公司 | Device for detecting 80C31 single particle effect |
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