CN105865635A - Low-power low-noise power source for refrigeration type infrared thermal imager - Google Patents
Low-power low-noise power source for refrigeration type infrared thermal imager Download PDFInfo
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- CN105865635A CN105865635A CN201610217554.6A CN201610217554A CN105865635A CN 105865635 A CN105865635 A CN 105865635A CN 201610217554 A CN201610217554 A CN 201610217554A CN 105865635 A CN105865635 A CN 105865635A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims description 53
- 238000001914 filtration Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 5
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical class O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims 2
- 238000001931 thermography Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000004297 night vision Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
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- Spectroscopy & Molecular Physics (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
The invention belongs to the technical field of electronics of a refrigeration type infrared thermal imager, and specifically relates to a low-power low-noise power source for a refrigeration type infrared thermal imager. The power source system provided by the invention employs a power source bus structure and comprises external power source input, a power source management module and a secondary power source. In a power source circuit of the refrigeration type infrared thermal imager, the external power source input is a 12 to 28V DC power supply; an input external power source is protected and monitored through the power source management module, and the external power source is output to the secondary power source; and the externally input DC power supply is converted into power sources with different voltages, needed for control of an image processing circuit, a signal collection circuit and a refrigeration machine through the secondary power source. According to the technical scheme, in accordance with actual application conditions of various power source type of the thermal imager, the power source types are optimized, the power supply mode is dynamically adjusted, and the low-power low-noise power source has the advantages of high power source conversion efficiency, low power source noise and the like.
Description
Technical field
The invention belongs to refrigeration mode thermal infrared imager art of electronics, be specifically related to a kind of low-power consumption low noise power supply for refrigeration mode thermal infrared imager.
Background technology
Refrigeration mode thermal infrared imager has good environmental suitability, and in military night vision investigation, the fields such as tool taken aim at by weapon, infrared guidance, Search/Track, land and sea border defense, satellite remote sensing are widely used.Along with the development of refrigeration mode infrared imagery technique, the imaging performance of infrared unit is required more and more higher by each application, and functional requirement is more and more abundanter, the imaging noise to thermal imaging system, operating power consumption, and unit size is proposed higher requirement.The high performance programmable device used due to electricity system gets more and more, and circuit board density is more and more higher, and signal rate is increasingly faster, this just power supply to system put forward higher requirement.
Traditional thermal imaging system unit power supply architecture uses integrated type power module in a large number, and this power supply architecture power supply aggregate efficiency is relatively low, and power supply ripple is big, and power supply Heavy Weight volume is big, it is impossible to meet the design requirement of modern thermal imaging system unit very well.
It is thus desirable to combine the own characteristic of Switching Power Supply and linear power supply, in conjunction with the different demands of different electrical power in thermal imaging system unit, a kind of power-efficient high of design, the thermal imaging system power solution of low noise, to improve thermal imaging system complete machine imaging performance, reducing equipment power dissipation, reduce unit weight, more preferable power-assisted refrigeration mode thermal infrared imager develops.
Summary of the invention
The technical problem to be solved in the present invention is to provide the power source design providing a kind of efficient low noise into thermal imaging system, ensures the high reliability of system power supply simultaneously.
In order to realize this purpose, the present invention adopts the technical scheme that:
A kind of low-power consumption low noise power supply for refrigeration mode thermal infrared imager, inputs including external power source, power management module and secondary power supply；
Wherein, in the power circuit of refrigeration mode thermal infrared imager, external power source input is the direct current supply of 12～28V；By power management module, the external power source of input is protected and monitored and external power source is exported secondary power supply；By secondary power supply, the DC source that outside inputs is converted into image processing circuit, signal collection circuit, refrigeration machine control needed for the power supply of different voltages；
Secondary power supply includes isolation DC/DC module, non-isolation DC/DC module, power filtering module, non-isolation DC/DC analog power, non-isolation DC/DC digital power, LDO analog power；
Wherein, non-isolation DC/DC module controls to provide power supply, the power supply conversion efficiency ＞ 90% of non-isolation DC/DC module for refrigeration machine；
Isolation DC/DC module, power filtering module, non-isolation DC/DC analog power, non-isolation DC/DC digital power, LDO analog power collectively constitutes three stage power source topological structure:
Isolation DC/DC module in the first order is for controlling the electrical isolation isolating thermal imager system power supply with global source；
Isolation DC/DC module out-put supply enters through power filtering module and includes n non-isolation DC/DC analog power and the second level of m non-isolation DC/DC digital power, n >=1, m >=1, non-isolation DC/DC digital power therein is for producing the power supply needed for image processing circuit；
The third level includes n LDO analog power, controls in 100mV rank by the non-isolation DC/DC analog power in the second level by the input and output voltage difference of LDO analog power, for producing the power supply needed for signal collection circuit.
Further, a kind of low-power consumption low noise power supply for refrigeration mode thermal infrared imager, wherein: the running voltage that refrigeration machine controls power supply and needs is 24V, and operating current is 1A；The running voltage that image processing circuit needs is 3.3V, and operating current is 2A；The running voltage that signal collection circuit needs is 100mV rank.
Further, a kind of low-power consumption low noise power supply for refrigeration mode thermal infrared imager, wherein: when thermal imager operation, this low-power consumption low noise power supply produces the power supply conversion efficiency ＞ 90% of the power supply needed for image processing circuit.
Further, a kind of low-power consumption low noise power supply for refrigeration mode thermal infrared imager, wherein: when thermal imager operation, this low-power consumption low noise power supply produces the power supply conversion efficiency ＞ 90% of the power supply needed for signal collection circuit.
Further, a kind of low-power consumption low noise power supply for refrigeration mode thermal infrared imager, wherein: when thermal imager operation, main power efficiency ＞ 85% of this low-power consumption low noise power supply.
Compare with traditional approach, having the beneficial effects that of technical solution of the present invention:
The features such as this power-supply system uses power bus structure, has three stage power source topology, according to the thermal imaging system actually used situation of each power type, optimizes power type, dynamically adjust powering mode, have high power supply conversion efficiency, low power supply noise.
This power source design, on the premise of sacrificing certain cost and system space, reduces system power dissipation so that the Overall Power Consumption of infrared unit decreases beyond 30% than front traditional scheme to greatest extent.At the sensitive power consumption the most handheld thermal infrared imager of type application, the power system design direction of missile-borne infrared system provides the solution of novelty.
Accompanying drawing explanation
Fig. 1 is that electric power network of the present invention forms schematic block diagram.
In figure: 1 external power source input, 2 power management modules, 3 isolation DC/DC modules, 4 non-isolation DC/DC modules, 5 external refrigerant, 6 power filtering modules, 7 non-isolation DC/DC analog powers, 8 non-isolation DC/DC digital powers, 9LDO analog power.
Detailed description of the invention
With specific embodiment, technical solution of the present invention is described in detail below in conjunction with the accompanying drawings.
As it is shown in figure 1, a kind of low-power consumption low noise power supply for refrigeration mode thermal infrared imager of the present invention, input including external power source, power management module and secondary power supply；
Wherein, in the power circuit of refrigeration mode thermal infrared imager, external power source input is the direct current supply of 12～28V；By power management module, the external power source of input is protected and monitored and external power source is exported secondary power supply；By secondary power supply, the DC source that outside inputs is converted into image processing circuit, signal collection circuit, refrigeration machine control needed for the power supply of different voltages；
In the present embodiment, the running voltage that refrigeration machine controls power supply and needs is 24V, and operating current is 1A；The running voltage that image processing circuit needs is 3.3V, and operating current is 2A；The running voltage that signal collection circuit needs is 100mV rank.
In line with improving main power efficiency, and ensure the mentality of designing that power supply noise requires, the scheme that the present embodiment technical scheme will use linear power supply to combine with DC-DC, realize the requirement of high power-efficient and low output ripple.I.e. the part that input and output pressure drop is big and power dissipation ratio is bigger being used DC-DC power source, to reduce size, to improve efficiency, and the analog circuit requiring part low power consumption, low noise uses linear power supply to improve power quality.
More for digital circuit power source kind, the feature the highest to power quality requirements, secondary non-isolation DC-DC chip is selected to realize the supply of multiple power source, it is simultaneous for the difference of the duty of thermal imaging system different operating each power supply in period, the mode of operation of each DC-DC of switching at runtime, to ensure when thermal imager operation, each branch power supply efficiency remains at 90%, and above main power efficiency is more than 85%.
Secondary power supply includes isolation DC/DC module, non-isolation DC/DC module, power filtering module, non-isolation DC/DC analog power, non-isolation DC/DC digital power, LDO analog power；
Wherein, non-isolation DC/DC module controls to provide power supply, the power supply conversion efficiency ＞ 90% of non-isolation DC/DC module for refrigeration machine；
Isolation DC/DC module, power filtering module, non-isolation DC/DC analog power, non-isolation DC/DC digital power, LDO analog power collectively constitutes three stage power source topological structure:
Isolation DC/DC module in the first order is for controlling the electrical isolation isolating thermal imager system power supply with global source；
Isolation DC/DC module out-put supply enters through power filtering module and includes n non-isolation DC/DC analog power and the second level of m non-isolation DC/DC digital power, n >=1, m >=1, non-isolation DC/DC digital power therein is for producing the power supply needed for image processing circuit；
The third level includes n LDO analog power, controls in 100mV rank by the non-isolation DC/DC analog power in the second level by the input and output voltage difference of LDO analog power, for producing the power supply needed for signal collection circuit.
The gatherer process gathering actually weak voltage signals of infrared image, therefore the analog power Mass accuracy of signals collecting part is required high by system, therefore this partial power have employed the mode of linear power supply supply, simultaneously in order to improve power-efficient as far as possible, the non-isolation DC/DC analog power of the second level is increased between isolation DC/DC module and the LDO analog power of the third level in the first stage, reduce the input and output pressure reduction of the LDO analog power of the third level, i.e. ensure that power quality, improve power supply conversion efficiency simultaneously.LDO power supply input and output voltage difference, on the basis of ensure that analog power low ripple, is controlled in 100mV rank by this kind of power supply mode by non-isolation DC/DC analog power.This kind of power source design, on the premise of sacrificing certain cost and system space, reduces system power dissipation so that the Overall Power Consumption of infrared unit decreases beyond 30% than front traditional scheme to greatest extent.
Claims (5)
1. the low-power consumption low noise power supply for refrigeration mode thermal infrared imager, it is characterised in that:
Input including external power source, power management module and secondary power supply；
Wherein, in the power circuit of refrigeration mode thermal infrared imager, external power source input is the direct current of 12～28V
Power supply；By power management module, the external power source of input is protected and monitored and external power source is exported
To secondary power supply；By secondary power supply, the DC source that outside inputs is converted into image processing circuit, signal
The power supply of the different voltages needed for the control of collecting circuit, refrigeration machine；
Secondary power supply includes isolation DC/DC module, non-isolation DC/DC module, power filtering module, non-every
From DCDC analog power, non-isolation DC/DC digital power, LDO analog power；
Wherein, non-isolation DC/DC module controls to provide power supply, the electricity of non-isolation DC/DC module for refrigeration machine
Source conversion efficiency ＞ 90%；
Isolation DC/DC module, power filtering module, non-isolation DC/DC analog power, non-isolation DC/DC
Digital power, LDO analog power collectively constitutes three stage power source topological structure:
Isolation DC/DC module in the first order is for controlling the electricity isolating thermal imager system power supply with global source
Air bound from；
Isolation DC/DC module out-put supply enters through power filtering module and includes n non-isolation DC/DC mould
Intend power supply and the second level of m non-isolation DC/DC digital power, n >=1, m >=1, non-isolated therein
DCDC digital power is for producing the power supply needed for image processing circuit；
The third level includes n LDO analog power, will by the non-isolation DC/DC analog power in the second level
The input and output voltage difference of LDO analog power controls in 100mV rank, is used for producing signal collection circuit institute
The power supply needed.
A kind of low-power consumption low noise power supply for refrigeration mode thermal infrared imager, its
It is characterised by: the running voltage that refrigeration machine controls power supply and needs is 24V, and operating current is 1A；Image procossing
The running voltage that circuit needs is 3.3V, and operating current is 2A；The running voltage that signal collection circuit needs
It it is 100mV rank.
A kind of low-power consumption low noise power supply for refrigeration mode thermal infrared imager, its
Being characterised by: when thermal imager operation, this low-power consumption low noise power supply produces the electricity needed for image processing circuit
The power supply conversion efficiency ＞ 90% in source.
A kind of low-power consumption low noise power supply for refrigeration mode thermal infrared imager, its
Being characterised by: when thermal imager operation, this low-power consumption low noise power supply produces the electricity needed for signal collection circuit
The power supply conversion efficiency ＞ 90% in source.
A kind of low-power consumption low noise power supply for refrigeration mode thermal infrared imager, its
It is characterised by: when thermal imager operation, main power efficiency ＞ 85% of this low-power consumption low noise power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610217554.6A CN105865635A (en) | 2016-04-08 | 2016-04-08 | Low-power low-noise power source for refrigeration type infrared thermal imager |
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| CN201610217554.6A CN105865635A (en) | 2016-04-08 | 2016-04-08 | Low-power low-noise power source for refrigeration type infrared thermal imager |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489616A (en) * | 2017-12-27 | 2018-09-04 | 中国科学院长春光学精密机械与物理研究所 | A kind of integrated photodetection imaging system of temperature control |
| CN112484572A (en) * | 2020-11-25 | 2021-03-12 | 北京波谱华光科技有限公司 | Temperature control and power supply system of infrared sighting telescope |
| CN113098260A (en) * | 2021-02-25 | 2021-07-09 | 浙江兆晟科技股份有限公司 | Power supply system for uncooled thermal infrared imager |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489616A (en) * | 2017-12-27 | 2018-09-04 | 中国科学院长春光学精密机械与物理研究所 | A kind of integrated photodetection imaging system of temperature control |
| CN112484572A (en) * | 2020-11-25 | 2021-03-12 | 北京波谱华光科技有限公司 | Temperature control and power supply system of infrared sighting telescope |
| CN113098260A (en) * | 2021-02-25 | 2021-07-09 | 浙江兆晟科技股份有限公司 | Power supply system for uncooled thermal infrared imager |
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Application publication date: 20160817 |
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