CN113377143B - Deep space exploration color camera self-recovery anti-single particle locking system and method - Google Patents
Deep space exploration color camera self-recovery anti-single particle locking system and method Download PDFInfo
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- CN113377143B CN113377143B CN202110450137.7A CN202110450137A CN113377143B CN 113377143 B CN113377143 B CN 113377143B CN 202110450137 A CN202110450137 A CN 202110450137A CN 113377143 B CN113377143 B CN 113377143B
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Abstract
A self-recovery anti-single particle locking system and a method for a deep space detection color camera are disclosed, wherein a locking system comprising a DC-DC voltage conversion module, a locking current limiter, a current limiting type LDO (low dropout regulator), a color CMOS (complementary metal oxide semiconductor) detector, an FPGA (field programmable gate array) and an interface circuit is adopted, a current limiting threshold value is set in a segmentation mode according to a fixed locking method and a flow according to a flow aiming at the power-on process and the working process of the color CMOS detector, and meanwhile, an independent current limiting type LDO is set aiming at a power supply part sensitive to single particle locking of the color CMOS detector, so that multi-stage current limiting judgment is carried out, and the reliability of the system is ensured.
Description
Technical Field
The invention relates to a self-recovery anti-single-particle locking system and a self-recovery anti-single-particle locking method for a deep space exploration color camera, and belongs to the field of deep space exploration.
Background
The color camera is used as an intuitive and effective data acquisition source and has wide application in various aerospace deep space exploration, the color camera detector needs to be a color detector, the factors of single machine size, power consumption, circuit complexity and the like are considered, and the deep space exploration color camera selects a color CMOS detector as an image sensor for photoelectric conversion. As the single-particle resistance of the color CMOS detector is low, a single-particle protection design is required in design, so that the on-orbit reliability of the camera is ensured.
A current limiting resistor or a current limiting type LDO is added into a power supply loop to carry out locking protection. However, firstly, the method of adding a current limiting resistor in the power supply loop can only be used for a CMOS integrated device with a small working current, and the power supply of the color CMOS detector is sensitive to voltage fluctuation, and the method of the current limiting resistor cannot be adopted. Secondly, the current limiting value of the current limiting type LDO is a single value, the current fluctuation of the color CMOS detector is large in the power-on process and the working process, and if single threshold value is adopted for current limiting, misjudgment is easily caused, and the protection circuit is caused to malfunction.
Disclosure of Invention
The technical problem solved by the invention is as follows: aiming at the problems that the traditional technology is easy to cause camera protection circuit malfunction and the camera power-on process fluctuates greatly in the prior art, the system and the method for detecting the self-recovery anti-single event locking of the color camera in the deep space are provided.
The technical problem to be solved by the invention is realized by the following technical scheme:
a self-recovery single event latchup-resistant system of a deep space exploration color camera comprises a DC-DC voltage conversion module, a latchup current limiter, a current-limiting LDO (low dropout regulator), a color CMOS (complementary metal oxide semiconductor) detector, an FPGA (field programmable gate array) and an interface circuit, wherein:
a DC-DC voltage conversion module: supplying power through an external power supply, converting the voltage of the external power supply and supplying power for the locking current limiter;
locking the current limiter: the voltage transmitted by the DC-DC voltage conversion module is limited, two paths of power supply are carried out on the color CMOS detector, and the two paths of power supply are controlled by the FPGA; when the color CMOS detector has an overcurrent phenomenon, the current limiter is locked to have an overcurrent state mark and the overcurrent state mark is sent to the FPGA; when the color CMOS detector has no overcurrent, the power supply circuit supplies power to the color CMOS detector normally;
the current-limiting LDO: supplying power to a sensitive power supply part of the color CMOS detector, judging whether the color CMOS detector has an overcurrent phenomenon, and if so, sending an overcurrent state mark to the FPGA;
color CMOS detector: detecting whether the two paths of power supplies have an overcurrent phenomenon, and if the overcurrent phenomenon occurs, respectively sending an overcurrent state mark to the FPGA through a locking current limiter and a current limiting type LDO;
FPGA: and controlling the locking current limiter through the control word, if the overcurrent state identification is received, sending the control word to the locking current limiter according to the obtained overcurrent state identification for closing, and outputting the overcurrent state parameters outwards through the interface circuit in a telemetering signal mode.
The two paths of power supply of the color CMOS detector are specifically as follows:
the power supply is carried out on the color CMOS detector with the same voltage as the locking current limiter, and the power supply is carried out on the sensitive power supply part of the color CMOS detector.
The control word is 2bit and comprises 11, 10, 01 and 00 which respectively correspond to a locking current limiter opening/high threshold value, a locking current limiter opening/low threshold value, a locking current limiter closing/high threshold value and a locking current limiter closing/low threshold value.
The current limiting LDO state comprises: 0-normal operation, 1-overcurrent state.
A self-recovery anti-single particle locking method for a deep space exploration color camera comprises the following steps:
(1) Controlling power-on through an external power supply;
(2) Carrying out initialization and power-on reset;
(3) Setting a locking current limiter control word as 11, wherein the locking current limiter is an opening/high threshold of the locking current limiter;
(4) Powering on the color CMOS detector;
(5) Setting a locking current limiter control word to be 10, wherein the locking current limiter is an opening/low threshold of the locking current limiter;
(6) The FPGA judges whether the current limiting state of the current limiting type LDO is 1 in real time, if 0 is detected to be 1, the control word of the current limiter is set to 00, meanwhile, the camera state remote control is set to 1, and if the current limiting state of the current limiting type LDO is 0, the FPGA judges the next step;
(7) And the FPGA judges whether the current limiting state of the current limiter is 1 in real time, the control word of the current limiter is set to 00 when 0 is detected to be 1, and meanwhile, the telemetering state of the camera is set to 1, and the telemetering state of the camera is set to 0 when the current limiting state of the current limiter is 0 and the camera normally operates.
The initialization and power-on reset time is 200ms.
The power-on time of the color CMOS detector is 20ms.
Compared with the prior art, the invention has the advantages that:
according to the self-recovery anti-single event locking system and method for the deep space detection color camera, threshold value gears are divided in a time-sharing mode according to the threshold value for locking protection of the color CMOS detector, so that the problem that the protection threshold value is difficult to match with the locking current of a protected device in the existing method is solved, the situation that the protected device cannot be separated from a locking state or locking misjudgment is avoided, the problem that locking judgment is mostly carried out by adopting a single threshold value in the prior art is solved, and meanwhile, an independent current limiting type LDO is arranged according to the circuit locking sensitive power supply part of the color CMOS detector to carry out multi-stage current limiting judgment, so that the reliability of the system is guaranteed.
Drawings
FIG. 1 is a schematic diagram of a self-recovery single event-resistant locking system for a camera according to the present invention;
FIG. 2 is a schematic diagram of a self-recovery single event lock resistant waveform of a camera according to the present invention;
FIG. 3 is a schematic diagram of a self-recovery single event lockout flow of a camera according to the present invention;
Detailed Description
A self-recovery single-particle-locking-resistant system and a self-recovery single-particle-locking-resistant method for a deep space detection color camera are disclosed, wherein a current-limiting threshold value is set in a segmented mode in the power-on process and the working process of a color CMOS detector, and meanwhile, an independent current-limiting type LDO is set in a power supply part sensitive to single-particle locking of the color CMOS detector to perform multi-stage current-limiting judgment, so that the reliability of the system is guaranteed.
The self-recovery anti-single particle locking system of the deep space exploration color camera mainly comprises:
DC-DC voltage conversion module, locking current limiter, current limiting type LDO, colored CMOS detector, FPGA, interface circuit, wherein:
a DC-DC voltage conversion module: supplying power through an external power supply, converting the voltage of the external power supply, and supplying power for the locking current limiter;
locking the current limiter: the voltage transmitted by the DC-DC voltage conversion module is limited, two paths of power supply are carried out on the color CMOS detector, and the two paths of power supply are controlled by the FPGA; when the color CMOS detector has an overcurrent phenomenon, the current limiter is locked to have an overcurrent state mark and the overcurrent state mark is sent to the FPGA; when the color CMOS detector has no overcurrent, the power supply circuit supplies power to the color CMOS detector normally;
the current-limiting LDO: supplying power to a sensitive power supply part of the color CMOS detector, judging whether the color CMOS detector has an overcurrent phenomenon, and if so, sending an overcurrent state mark to the FPGA;
the current limiting LDO states include: 0-normal operation, 1-overcurrent state;
color CMOS detector: detecting whether the two paths of power supplies have an overcurrent phenomenon, and if the overcurrent phenomenon occurs, respectively sending an overcurrent state mark to the FPGA through a locking current limiter and a current limiting type LDO;
the color CMOS detector adopts two paths of power supplies which are respectively supplied with the same voltage as the locking current limiter and independently supplied with the sensitive power supply part of the color CMOS detector;
FPGA: controlling the locking current limiter through the control word, if receiving the overcurrent state identification, sending the control word to the locking current limiter according to the obtained overcurrent state identification for closing, and outputting the overcurrent state parameter outwards through an interface circuit in a form of a telemetering signal;
wherein, the control word is 2bit, comprising 11, 10, 01, 00, corresponding to the locking current limiter opening/high threshold, locking current limiter opening/low threshold, locking current limiter closing/high threshold, locking current limiter closing/low threshold respectively;
according to the self-recovery single-event-resistant locking system of the deep space exploration color camera, a self-recovery single-event-resistant locking method of the deep space exploration color camera is provided, and the method comprises the following specific steps:
(1) Controlling power-on through an external power supply;
(2) Initializing and carrying out power-on reset;
the initialization and power-on reset time is 200ms;
(3) Setting a locking current limiter control word as 11, wherein the locking current limiter is a locking current limiter opening/high threshold value;
(4) Powering up the color CMOS detector;
the power-on time of the color CMOS detector is 20ms;
(5) Setting a locking current limiter control word to be 10, wherein the locking current limiter is a locking current limiter opening/low threshold value;
(6) The FPGA judges whether the current limiting state of the current limiting type LDO is 1 in real time, if 0 is detected to be 1, the control word of the current limiter is set to 00, meanwhile, the camera state remote control is set to 1, and if the current limiting state of the current limiting type LDO is 0, the FPGA judges the next step;
(7) And the FPGA judges whether the current limiting state of the current limiter is 1 in real time, the control word of the current limiter is set to 00 when 0 is detected to be 1, and meanwhile, the telemetering state of the camera is set to 1, and the telemetering state of the camera is set to 0 when the current limiting state of the current limiter is 0 and the camera normally operates.
The following is further illustrated with reference to specific examples:
in this embodiment, a deep space detection color camera self-recovery anti-single event latchup system is shown in fig. 1, the internal power supply conversion is realized by high-efficiency DC-DC, and the color CMOS detector circuit latching sensitive power supply part is realized by a low-noise current-limiting type LDO.
The current limiting threshold value of the locking current limiter is controlled by the FPGA, and the control word is 2 bits, wherein the high bit controls the switch of the current limiter, and the low bit controls the current limiting threshold value, namely 11 is the current limiter switch, and the high threshold value is obtained; 10 is current limiter on, 11 is low threshold, 01 and 00 are current limiter off.
The normal state of the current limiting LDO is 0, and the state is changed from 0 to 1 after overcurrent occurs;
the normal state of the locking current limiter is 0, and the state is changed from 0 to 1 after overcurrent occurs;
the normal state of the camera state remote measurement is 0, and the state is changed from 0 to 1 after overcurrent occurs.
As shown in fig. 3, a self-recovery single event locking process of a camera is specifically described as follows:
(1) Powering on the camera, wherein the camera is controlled to be powered on by external power supply;
(2) Waiting for 200ms, wherein the process is the initialization and power-on reset process inside the camera;
(3) The current limiter control word is set to 11, when the current limiter is on, high threshold:
(4) Waiting for 20ms, wherein the process is a power-on process of the color CMOS detector;
(5) The current limiter control word is set to 10, and then the current limiter is low and the threshold is high:
(6) The FPGA judges whether the current limiting state of the current limiting type LDO is 1 in real time, when 0 is detected to be 1, the control word of the current limiter is set to 00, meanwhile, the telemetering state of the camera is set to 1, and when the current limiting state of the current limiting type LDO is 0, the FPGA judges the next step;
(7) The FPGA judges whether the current limiting state of the current limiter is 1 in real time, the control word of the current limiter is set to 00 when 0 is detected to be 1, meanwhile, the telemetering state of the camera is set to 1, and the telemetering state of the current limiter is 0 when the current limiting state of the current limiter is 0, the camera is set to 0 and normally operates
The schematic diagram of the camera self-recovery anti-single event locked waveform is shown in fig. 2, where the step (3) is executed at time T0, the step (5) is executed at time T1, the step (6) or the step (7) occurs at time T2, and the step (3) is restarted at time T3.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (7)
1. A self-recovery anti-single event locking system of a deep space exploration color camera is characterized by comprising: DC-DC voltage conversion module, locking current limiter, current limiting type LDO, colored CMOS detector, FPGA, interface circuit, wherein:
a DC-DC voltage conversion module: supplying power through an external power supply, converting the voltage of the external power supply and supplying power for the locking current limiter;
locking the current limiter: the voltage transmitted by the DC-DC voltage conversion module is limited, two paths of power supply are carried out on the color CMOS detector, and the two paths of power supply are controlled by the FPGA; when the color CMOS detector has an overcurrent phenomenon, the current limiter is locked to have an overcurrent state mark and the overcurrent state mark is sent to the FPGA; when the color CMOS detector has no overcurrent, the power supply circuit supplies power to the color CMOS detector normally;
the current-limiting LDO: receiving one path of power supply of the locking current limiter and supplying power to a sensitive power supply part of the color CMOS detector, judging whether the color CMOS detector has an overcurrent phenomenon, and if the color CMOS detector has the overcurrent phenomenon, sending an overcurrent state mark to the FPGA;
color CMOS detector: detecting whether the two paths of power supplies have an overcurrent phenomenon, and if the overcurrent phenomenon occurs, respectively sending an overcurrent state mark to the FPGA through a locking current limiter and a current limiting type LDO;
FPGA: and controlling the locking current limiter through the control word, if the overcurrent state identification is received, sending the control word to the locking current limiter according to the obtained overcurrent state identification for closing, and outputting the overcurrent state parameters outwards through the interface circuit in a telemetering signal mode.
2. The system according to claim 1, comprising:
the two paths of power supply of the color CMOS detector are specifically as follows:
the power supply is carried out on the color CMOS detector with the same voltage as the locking current limiter, and the power supply is carried out on the sensitive power supply part of the color CMOS detector.
3. The system according to claim 1, comprising:
the control word is 2bit and comprises 11, 10, 01 and 00 which respectively correspond to a locking current limiter opening/high threshold value, a locking current limiter opening/low threshold value, a locking current limiter closing/high threshold value and a locking current limiter closing/low threshold value.
4. The system according to claim 1, comprising:
the current limiting LDO state comprises: 0-normal operation, 1-overcurrent state.
5. A self-recovery anti-single particle locking method for a deep space exploration color camera is characterized by comprising the following steps:
(1) Controlling power-on through an external power supply;
(2) Carrying out initialization and power-on reset;
(3) Setting a locking current limiter control word as 11, wherein the locking current limiter is a locking current limiter opening/high threshold value;
(4) Powering up the color CMOS detector;
(5) Setting a locking current limiter control word to be 10, wherein the locking current limiter is a locking current limiter opening/low threshold value;
(6) The FPGA judges whether the current limiting state of the current limiting type LDO is 1 in real time, when 0 is detected to be 1, the control word of the current limiter is set to 00, meanwhile, the telemetering state of the camera is set to 1, and when the current limiting state of the current limiting type LDO is 0, the FPGA judges the next step;
(7) The FPGA judges whether the current limiting state of the current limiter is 1 in real time, when 0 is detected to be 1, the control word of the current limiter is set to 00, meanwhile, the telemetering state of the camera is set to 1, and when the current limiting state of the current limiter is 0, the telemetering state of the camera is set to 0 and the camera normally operates;
the method is realized by a deep space detection color camera self-recovery anti-single event locking system, and specifically comprises the following steps:
the method comprises the following steps: DC-DC voltage conversion module, locking current limiter, current limiting type LDO, colored CMOS detector, FPGA, interface circuit, wherein:
a DC-DC voltage conversion module: supplying power through an external power supply, converting the voltage of the external power supply and supplying power for the locking current limiter;
locking the current limiter: the voltage transmitted by the DC-DC voltage conversion module is limited, two paths of power supply are carried out on the color CMOS detector, and the two paths of power supply are controlled by the FPGA; when the color CMOS detector has an overcurrent phenomenon, the current limiter is locked to have an overcurrent state mark and the overcurrent state mark is sent to the FPGA; when the color CMOS detector has no overcurrent, the power supply is normally supplied to the color CMOS detector;
current limiting type LDO: receiving one path of power supply of the locking current limiter and supplying power to a sensitive power supply part of the color CMOS detector, judging whether the color CMOS detector has an overcurrent phenomenon, and if the color CMOS detector has the overcurrent phenomenon, sending an overcurrent state mark to the FPGA;
color CMOS detector: detecting whether the two paths of power supplies have an overcurrent phenomenon, and if the overcurrent phenomenon occurs, respectively sending an overcurrent state mark to the FPGA through a locking current limiter and a current limiting type LDO;
FPGA: and controlling the locking current limiter through the control word, if receiving the overcurrent state identifier, sending the control word to the locking current limiter according to the obtained overcurrent state identifier for closing, and outputting the overcurrent state parameter outwards through the interface circuit in a form of a telemetering signal.
6. The method according to claim 5, wherein the method comprises the following steps:
the initialization and power-on reset time is 200ms.
7. The method according to claim 5, wherein the method comprises the following steps:
the power-on time of the color CMOS detector is 20ms.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6064555A (en) * | 1997-02-25 | 2000-05-16 | Czajkowski; David | Radiation induced single event latchup protection and recovery of integrated circuits |
| CN106655078B (en) * | 2016-10-25 | 2018-09-11 | 哈尔滨工业大学 | Integrated circuit latch protection system and method under a kind of space environment |
| CN107197175B (en) * | 2017-05-31 | 2020-02-14 | 北京空间机电研究所 | High-rail area array staring infrared camera imaging circuit system |
| CN107835339B (en) * | 2017-09-30 | 2019-12-27 | 中国科学院长春光学精密机械与物理研究所 | Locking protection method and system for CMOS image sensor of space camera |
| CN113363933B (en) * | 2021-06-07 | 2022-08-23 | 中国科学院光电技术研究所 | Single event effect protection device and method |
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