CN112484572A - Temperature control and power supply system of infrared sighting telescope - Google Patents
Temperature control and power supply system of infrared sighting telescope Download PDFInfo
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- CN112484572A CN112484572A CN202011340095.3A CN202011340095A CN112484572A CN 112484572 A CN112484572 A CN 112484572A CN 202011340095 A CN202011340095 A CN 202011340095A CN 112484572 A CN112484572 A CN 112484572A
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- 238000005057 refrigeration Methods 0.000 claims abstract description 53
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000003384 imaging method Methods 0.000 claims abstract description 16
- 230000001276 controlling effect Effects 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 109
- 230000000087 stabilizing effect Effects 0.000 claims description 37
- 230000005611 electricity Effects 0.000 claims description 21
- 101100112673 Rattus norvegicus Ccnd2 gene Proteins 0.000 claims description 12
- 230000005669 field effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G1/00—Sighting devices
- F41G1/32—Night sights, e.g. luminescent
- F41G1/34—Night sights, e.g. luminescent combined with light source, e.g. spot light
- F41G1/36—Night sights, e.g. luminescent combined with light source, e.g. spot light with infrared light source
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G1/00—Sighting devices
- F41G1/06—Rearsights
- F41G1/14—Rearsights with lens
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
The invention relates to a temperature control and power supply system of an infrared sighting telescope, wherein the infrared sighting telescope comprises a non-refrigeration type infrared detector and an imaging eyepiece, and the non-refrigeration type infrared detector is electrically connected with the imaging eyepiece through a photoelectric converter; the temperature control and power supply system comprises a temperature control system and a power supply system; the temperature control system is specifically an electronic refrigeration heating sheet based on MAX1978, and is used for regulating and controlling the working temperature of the non-refrigeration type infrared detector; the power supply system comprises a first-stage analog power supply, a reference voltage power supply, an ADC digital power supply, a detector analog power supply and a detector digital power supply; the invention not only designs the temperature control circuit used by the non-refrigeration infrared detector, but also optimizes the whole power circuit; because the temperature control function of the temperature control circuit is realized by controlling the current of the electronic refrigeration heating sheet, the current in the whole circuit is subjected to noise reduction and anti-interference treatment, so that the temperature control precision and stability can be effectively controlled, and the imaging quality and stability are improved.
Description
Technical Field
The invention relates to the field of infrared sighting telescope, in particular to a temperature control and power supply system of an infrared sighting telescope.
Background
The sighting telescope for the infrared gun can observe that an infrared vision place displays a live target through the eyepiece, provides infrared imaging information of the live target for a user under the condition of poor visual conditions, and requires that a non-refrigeration type infrared detector in the infrared sighting telescope quickly reach the working temperature and stably keep the working state. The visible light mechanical sighting telescope has strong dependence on light line parts, so the sighting telescope has poor observation capability under dark and rain and fog conditions, and the use of the infrared sighting telescope is one of important methods for solving the problems. However, since the stable operation of the infrared detector needs to be within a certain temperature range, otherwise, since the temperature consistency of the infrared detector cannot be ensured, obvious bright and dark regions appear, and the imaging quality is affected. In the infrared sighting telescope, the problem has a great negative effect on the judgment of a shooter, and even whether a target exists in a visual field cannot be judged.
The existing temperature control scheme in the infrared sighting telescope is that a standard circuit is set by using a TEC temperature control chip specification, and the temperature is controlled by controlling the current according to the proportional relation between the controlled temperature and the chip current. In the existing temperature control scheme, the standard circuit construction recommended by the electronic refrigeration heating sheet only aims at the realization of refrigeration and heating functions, specific application environment and scene are not considered, and for military purposes such as a gun sighting telescope, the stability of temperature control cannot meet the military standard requirement, so that the imaging effect is poor.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a temperature control and power supply system of an infrared sighting telescope, which can reduce interference and improve imaging quality and stability.
The technical scheme for solving the technical problems is as follows: a temperature control and power supply system of an infrared sighting telescope comprises a non-refrigeration type infrared detector and an imaging eyepiece, wherein the non-refrigeration type infrared detector is electrically connected with the imaging eyepiece through a photoelectric converter; the temperature control and power supply system comprises a temperature control system and a power supply system; the temperature control system is specifically an electronic refrigeration heating sheet based on MAX1978 and is used for regulating and controlling the working temperature of the non-refrigeration type infrared detector; the power supply system comprises a primary analog power supply, a reference voltage power supply, an ADC digital power supply, a detector analog power supply and a detector digital power supply; the input end of one-level analog power supply is connected on power supply unit's output, one-level analog power supply's output with reference voltage source's input electricity is connected, reference voltage source's output respectively with ADC digital power supply's input with detector analog power supply's input electricity is connected, ADC digital power supply's output with photoelectric converter electricity is connected, detector analog power supply's output with non-refrigeration type infrared detector electricity is connected, detector digital power supply's input difference electricity is connected one-level analog power supply's output with on reference voltage power supply's the output, detector digital power supply's output with non-refrigeration type infrared detector electricity is connected, power supply unit's output still with the eyepiece electricity that images is connected.
The invention has the beneficial effects that: in the temperature control and power supply system of the infrared sighting telescope, a low-noise device is utilized to complete the construction of a primary analog power supply, then the design of a reference voltage source is completed by further noise reduction, an ADC digital power supply and a detector analog power supply are realized on the basis, a stable low-noise power supply is provided for a photoelectric converter and a non-refrigeration type infrared detector, the detector digital power supply is constructed on the basis of the primary low-noise analog power supply and the reference voltage power supply, and the design of the whole power supply is completed; the temperature control system is specifically an MAX 1978-based electronic refrigeration heating sheet, the temperature control system is directly powered by a power supply circuit, a MAX1978 temperature controller and a temperature setting circuit are formed by a feedback circuit formed by a low-noise amplifier, and a disturbance prevention structure formed by an inductor and a capacitor is added into the MAX1978 temperature controller, so that stable temperature control can be realized; the invention not only designs the temperature control circuit used by the non-refrigeration infrared detector, but also optimizes the whole power circuit; because the temperature control function of the temperature control circuit is realized by controlling the current of the electronic refrigeration heating sheet, the current in the whole circuit is subjected to noise reduction and anti-interference treatment, so that the temperature control precision and stability can be effectively controlled, and the imaging quality and stability are improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a temperature control and power supply system of an infrared sighting telescope according to the present invention;
FIG. 2 is a schematic diagram of a circuit configuration of a one-stage analog power supply;
FIG. 3 is a schematic diagram of a circuit configuration of a reference voltage power supply;
FIG. 4 is a schematic diagram of a circuit configuration of an ADC digital power supply;
FIG. 5 is a schematic diagram of the circuit configuration of the analog power supply of the detector;
FIG. 6 is a schematic diagram of the circuit configuration of the digital power supply of the detector;
FIG. 7 is a schematic diagram of a circuit configuration of a power circuit;
FIG. 8 is a schematic diagram of the circuit configuration of the present temperature input circuit and the temperature setting circuit;
fig. 9 is a schematic circuit diagram of a MAX1978 temperature controller.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The invention aims to combine the technical development situation that non-refrigeration type infrared detectors are applied to sighting telescope for infrared guns in recent years, and provides a temperature control and power supply system of the infrared sighting telescope based on a certain sighting telescope for the infrared gun, wherein the temperature control is based on an MAX1978 electronic refrigeration sheet, and the whole power supply is redesigned according to the MAX1978 driving rule and the military standard, so that the interference is reduced, and the imaging quality and stability are improved.
As shown in fig. 1, a temperature control and power supply system of an infrared sighting telescope includes a non-refrigeration type infrared detector and an imaging eyepiece, wherein the non-refrigeration type infrared detector is electrically connected with the imaging eyepiece through a photoelectric converter; the temperature control and power supply system comprises a temperature control system and a power supply system; the temperature control system is specifically an electronic refrigeration heating sheet based on MAX1978 and is used for regulating and controlling the working temperature of the non-refrigeration type infrared detector; the power supply system comprises a primary analog power supply, a reference voltage power supply, an ADC digital power supply, a detector analog power supply and a detector digital power supply; the input end of one-level analog power supply is connected on power supply unit's output, one-level analog power supply's output with reference voltage source's input electricity is connected, reference voltage source's output respectively with ADC digital power supply's input with detector analog power supply's input electricity is connected, ADC digital power supply's output with photoelectric converter electricity is connected, detector analog power supply's output with non-refrigeration type infrared detector electricity is connected, detector digital power supply's input difference electricity is connected one-level analog power supply's output with on reference voltage power supply's the output, detector digital power supply's output with non-refrigeration type infrared detector electricity is connected, power supply unit's output still with the eyepiece electricity that images is connected. The temperature control system comprises an MAX1978 temperature controller, a temperature setting circuit, a current temperature input circuit, a power supply circuit and an electronic refrigeration heating sheet; the electronic refrigerating and heating sheet is arranged in the non-refrigerating infrared detector and is electrically connected to the output end of the MAX1978 temperature controller; a temperature sensor is also arranged in the non-refrigeration type infrared detector and is electrically connected with the input end of the MAX1978 temperature controller through the current temperature input circuit; the temperature setting circuit is electrically connected with the input end of the MAX1978 temperature controller; the input end of the power supply circuit is electrically connected to the output end of the power supply equipment, and the output end of the power supply circuit is electrically connected with the MAX1978 temperature controller and the current temperature input circuit respectively.
In this particular embodiment:
as shown in fig. 2, the primary analog power supply includes a voltage stabilizing chip U1 of model LT3045, the VIN _1 pin, the VIN _2 pin and the EN/UV pin of the voltage stabilizing chip U1 are connected together, the VIN _1 pin of the voltage stabilizing chip U1 is connected to the output terminal of the power supply device through an inductor L1, the VIN _1 pin of the voltage stabilizing chip U1 is further connected to an analog ground through an inductor L1 and a capacitor C1 in sequence, the VIN _1 pin of the voltage stabilizing chip U1 is further connected to a +5V analog voltage, the VIN _1 pin of the voltage stabilizing chip U1 is further connected to an analog ground through a capacitor C2, a resistor R1 is connected between the analog ground of the capacitor C1 and the analog ground of the capacitor C2, the VIN _1 pin of the voltage stabilizing chip U1 is further connected to an analog ground through a capacitor C3, the EG pin of the voltage stabilizing chip 686u 8 is connected to an analog ground, the analog ground of the capacitor C3 and the im pin of the voltage stabilizing chip 35 1 are both connected to the voltage stabilizing chip im 2, the PGFB pin of the voltage stabilizing chip U1 is connected with an analog ground through a resistor R3, the PGFB pin of the voltage stabilizing chip U1 is further connected with the OUT pin of the voltage stabilizing chip U1 through a resistor R4, the SET pin of the voltage stabilizing chip U1 is connected with the analog ground through a capacitor C4 and a resistor R5, the GND pin of the voltage stabilizing chip U1 is connected with the analog ground, the OUTS pin of the voltage stabilizing chip U1 is connected with the OUT pin of the voltage stabilizing chip U1, the OUT pin of the voltage stabilizing chip U1 is connected with the analog ground through a capacitor C5, and the OUT pin of the voltage stabilizing chip U1 is the output end of the primary analog power supply and outputs 4.5V analog voltage. The primary analog power supply uses the LT3045 as a core device, so that the whole performance of the circuit is stable, and the noise is low; the power supply is externally connected with a 5V power supply input and provides analog 4.5V voltage output.
As shown in fig. 3, the reference voltage source includes a reference voltage source chip U2 with model number ADR4540, a Vin pin of the reference voltage source chip U2 is connected to the output terminal of the primary analog power source, a Vin pin of the reference voltage source chip U2 is further connected to an analog ground through a capacitor C6, a GND pin of the reference voltage source chip U2 is connected to the analog ground, a Vout pin of the reference voltage source chip U2 is connected to the analog ground through a capacitor C7, and a Vout pin of the reference voltage source chip U2 is the output terminal of the reference voltage source and outputs 4.096V. The reference voltage power supply uses ADR4540 as a core device to form a reference voltage source, provides reference voltage for the whole circuit, and realizes further noise reduction of circuit signals through the design of the circuit.
As shown in fig. 4, the ADC digital power supply includes an operational amplifier U3A with model LTC6253, the input pin in the same direction of the operational amplifier U3A is connected to the output terminal of the reference voltage power supply through a resistor R6, the input pin in the same direction of the operational amplifier U3A is further connected to an analog ground through a resistor R6 and a capacitor C8 in turn, the input pin in the same direction of the operational amplifier U3A is further connected to an analog ground through a capacitor C9 and a resistor R7, the input pin in the opposite direction of the operational amplifier U3A is connected to the output pin of the operational amplifier U3A, the V-pin of the operational amplifier U3A is connected to an analog ground, the V + pin of the operational amplifier U3A is connected to the output terminal of the primary analog power supply, the V + pin of the operational amplifier U3A is connected to an analog ground through a capacitor C10, the output pin of the operational amplifier U3A is connected to an analog ground through a capacitor C11, the output pin of the operational amplifier U3A is the output terminal of the ADC digital power supply, which outputs a 3.3V low noise digital voltage. The ADC digital power supply adopts LTC6253 as a core device, and is designed by utilizing a high-stability resistor, and the resistance of the resistor is constant along with the temperature change.
As shown in fig. 5, the analog power supply of the detector includes an operational amplifier U3B with model LTC6253, the input pin in the same direction of the operational amplifier U3B is connected to the output terminal of the reference voltage power supply through a resistor R8, the input pin in the same direction of the operational amplifier U3B is further connected to an analog ground through a resistor R8 and a capacitor C12 in turn, the input pin in the same direction of the operational amplifier U3B is further connected to an analog ground through a capacitor C13 and a resistor R9, the input pin in the opposite direction of the operational amplifier U3B is connected to the output pin of the operational amplifier U3B, the output pin of the operational amplifier U3B is connected to an analog ground through a capacitor C14, and the output pin of the operational amplifier U3B is the output terminal of the analog power supply of the detector, and outputs a low analog voltage of 3.6V. The detector simulation power supply adopts LTC6253 as a core device, and is designed by utilizing a high-stability resistor, and the resistance of the resistor is constant along with the temperature change.
As shown in fig. 6, the digital power supply of the detector includes an operational amplifier U4 with model number LT6202, the homodromous input pin of the operational amplifier U4 is connected to the output terminal of the reference voltage power supply through a resistor R10, the homodromous input pin of the operational amplifier U4 is further connected to an analog ground through a resistor R10 and a capacitor C15 in turn, the homodromous input pin of the operational amplifier U4 is further connected to an analog ground through a capacitor C16 and a resistor R11 in turn, the inverting input pin of the operational amplifier U4 is connected to the output pin of the operational amplifier U4, the GND pin of the operational amplifier U4 is connected to an analog ground, the VCC pin of the operational amplifier U4 is connected to the output terminal of the primary analog power supply, the VCC pin of the operational amplifier U4 is connected to an analog ground through a capacitor C17, the output pin of the operational amplifier U4 is connected to a digital ground through a capacitor C18, the output pin of the operational amplifier U4 is the output terminal of the, it outputs a voltage of 1.8V. The digital power supply of the detector adopts LT6202 as a core device, and is designed by utilizing a high-stability resistor, the resistance value of the resistor is constant along with the temperature change, and the part outputs 1.8V low-noise digital voltage to provide required digital voltage for an I/O port of the detector of the infrared detector.
In the power supply system, the low-noise chip and the high anti-interference resistor are used, so that the power supply noise is suppressed as much as possible in the power supply transformation and amplification processes.
As shown in fig. 7, the power supply circuit includes an inductor L2, a resistor R12, a capacitor C19, and a capacitor C20, one end of the inductor L2 is electrically connected to the output terminal of the power supply device, one end of the inductor L2 is further connected to an analog ground through a capacitor C19, the other end of the inductor L2 is the output terminal of the power supply circuit and is connected to a digital ground through a capacitor C20, one end of the resistor R12 is connected to the analog ground, and the other end of the resistor R12 is connected to the digital ground.
As shown in fig. 8, the current temperature input circuit includes an operational amplifier U5A with model AD8656, a common direction input terminal of the operational amplifier U5A is electrically connected to the output terminal of the temperature sensor through a resistor R13, the common direction input terminal of the operational amplifier U5A is further connected to a digital ground through a capacitor C21, an inverting input terminal of the operational amplifier U5A is connected to the output terminal of the operational amplifier U5A, a ground terminal of the operational amplifier U5A is connected to the digital ground, a power terminal of the operational amplifier U5A is connected to the output terminal of the power circuit, the power terminal of the operational amplifier U5A is further connected to the digital ground through a capacitor C22 and a capacitor C23, one end of the output terminal of the operational amplifier U5A is connected to one end of a resistor R14, and the other end of the resistor R14 is the output terminal of the current temperature input circuit and is connected to the digital ground through a capacitor C24. The temperature setting circuit comprises an operational amplifier U5B with the model number of AD8656, wherein the same-direction input end of the operational amplifier U5B is connected with an external input device through a resistor R15, and the same-direction input end of the operational amplifier U5B is also connected with digital ground through a capacitor C25 and a capacitor C26 respectively; the inverting input end of the operational amplifier U5B is connected to the output end of the operational amplifier U5B, the output end of the operational amplifier U5B is electrically connected to one end of a resistor R16, the other end of the resistor R16 is the output end of the MAX1978 temperature setting circuit, and the other end of the resistor R16 is connected to the digital ground through a capacitor C27 and a capacitor C28 respectively.
As shown in fig. 9, the MAX1978 temperature controller includes a temperature control chip U6 with a model of MAX 1978; the FB-pin of the temperature control chip U6 is electrically connected with the output end of the current temperature input circuit through a resistor R17, and the FB-pin of the temperature control chip U6 is also connected with a digital ground through a resistor R18; the FB + pin of the temperature control chip U6 is electrically connected to the output end of the temperature setting circuit through a resistor R19, and the FB + pin of the temperature control chip U6 is also connected to a digital ground through a capacitor C29(10 muF/10%/16V), a capacitor C30(0.1 muF/10%/16V) and a capacitor C31(0.01 muF/10%/16V), respectively; the SHDN pin of the temperature control chip U6 is connected with a digital ground through a resistor R20, the SHDN pin of the temperature control chip U6 is also connected with the output end of the power supply circuit through a resistor R21, the SHDN pin of the temperature control chip U6 is also connected with an analog ground through the source electrode and the drain electrode of a field-effect tube Q1, the grid electrode of the field-effect tube Q1 is connected with an external switch through a resistor R22, and the grid electrode of the field-effect tube Q1 is also connected with the output end of the power supply circuit through a resistor R22 and a resistor R23 in sequence; a PGND0 pin, a PGND1 pin, a PGND2 pin and a PGND3 pin of the temperature control chip U6 are all connected with a digital ground; the LX2_0 pin, the LX2_1 pin and the LX2_2 pin of the temperature control chip U6 are connected together and then connected to the negative electrode of the electronic refrigeration heating plate through an inductor L3, and the LX2_0 pin, the LX2_1 pin and the LX2_2 pin of the temperature control chip U6 are connected together and then sequentially connected to a digital ground through an inductor L6 and a capacitor C32; the pin LX2_0, the pin LX2_1 and the pin LX2_2 of the temperature control chip U6 are connected together and then are connected to the anode of the electronic refrigeration heating plate through an inductor L6 and a capacitor C33 in sequence; the pin OS2 of the temperature control chip U6 is connected with a digital ground through a capacitor C32, the pin OS2 of the temperature control chip U6 is further connected with the digital ground through a capacitor C34 and a capacitor C35(10 mu F/10%/16V) in sequence, and the pin OS2 of the temperature control chip U6 is further connected to the anode of the electronic refrigeration heating sheet through a capacitor C34 and a resistor R24 in sequence; the OS1 pin of the temperature control chip U6 is connected to the anode of the electronic refrigeration heating sheet; the CS pin of the temperature control chip U6 is connected to the anode of the electronic refrigeration heating sheet through a resistor R24, the CS pin of the temperature control chip U6 is connected to digital ground through a capacitor C35, and the CS pin of the temperature control chip U6 is connected to digital ground through a capacitor C34 and a capacitor C32 in sequence; the LX1_0 pin, the LX1_1 pin and the LX1_2 pin of the temperature control chip U6 are connected together and then sequentially connected to the anode of the electronic refrigeration heating plate through an inductor L4 and a resistor R24, the LX1_0 pin, the LX1_1 pin and the LX1_2 pin of the temperature control chip U6 are connected together and sequentially connected to the digital ground through an inductor L4 and a capacitor C35, and the LX1_0 pin, the LX1_1 pin and the LX1_2 pin of the temperature control chip U6 are connected together and sequentially connected to the digital ground through an inductor L4, a capacitor C34 and a capacitor C32; the PVDD0 pin, the PVDD1 pin, the PVDD2 pin and the PVDD3 pin of the temperature-controlled chip U6 are all connected with the output end of the power supply circuit, and the PVDD0 pin, the PVDD1 pin, the PVDD2 pin and the PVDD3 pin of the temperature-controlled chip U6 are connected together and then respectively connected with a digital ground through a capacitor C36(0.1 muF/10%/16V), a capacitor C37(0.1 muF/10%/16V), a capacitor C38(0.1 muF/10%/16V) and a capacitor C39(0.1 muF/10%/16V).
In the MAX1978 temperature controller, an inductor and a resistor (specifically, an inductor L3, an inductor L4 and a resistor R24, and the model of the inductor L3 and the model of the inductor L4 can be LPS4018-472MLC) are used for isolating small current disturbance between a temperature control chip U6 and an electronic refrigerating heating sheet, so that inaccuracy of heating and refrigerating caused by current oscillation in a circuit can be avoided, and imaging quality is guaranteed.
The MAX1978 temperature controller also comprises a peripheral circuit of a temperature control chip U6 consisting of resistors R25-34 and capacitors C40-47, which is specifically shown in FIG. 9. The types of the capacitors 43-47 are as follows: c43 (10. mu.F/10%/16V), C44 (10. mu.F/10%/16V), C45 (10. mu.F/10%/16V), C46 (0.01. mu.F/10%/16V), C47 (0.47. mu.F/10%/16V), and other resistor and capacitor selection types are shown in FIG. 9.
In the temperature control and power supply system of the infrared sighting telescope, a low-noise device is utilized to complete the construction of a primary analog power supply, then the design of a reference voltage source is completed by further noise reduction, an ADC digital power supply and a detector analog power supply are realized on the basis, a stable low-noise power supply is provided for a photoelectric converter and a non-refrigeration type infrared detector, the detector digital power supply is constructed on the basis of the primary low-noise analog power supply and the reference voltage power supply, and the design of the whole power supply is completed; the temperature control system is specifically an MAX 1978-based electronic refrigeration heating sheet, the temperature control system is directly powered by a power supply circuit, a MAX1978 temperature controller and a temperature setting circuit are formed by a feedback circuit formed by a low-noise amplifier, and a disturbance prevention structure formed by an inductor and a capacitor is added into the MAX1978 temperature controller, so that stable temperature control can be realized; the invention not only designs the temperature control circuit used by the non-refrigeration infrared detector, but also optimizes the whole power circuit; because the temperature control function of the temperature control circuit is realized by controlling the current of the electronic refrigeration heating sheet, the current in the whole circuit is subjected to noise reduction and anti-interference treatment, so that the temperature control precision and stability can be effectively controlled, and the imaging quality and stability are improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A temperature control and power supply system of an infrared sighting telescope comprises a non-refrigeration type infrared detector and an imaging eyepiece, wherein the non-refrigeration type infrared detector is electrically connected with the imaging eyepiece through a photoelectric converter; the method is characterized in that: the temperature control and power supply system comprises a temperature control system and a power supply system; the temperature control system is specifically an electronic refrigeration heating sheet based on MAX1978 and is used for regulating and controlling the working temperature of the non-refrigeration type infrared detector; the power supply system comprises a primary analog power supply, a reference voltage power supply, an ADC digital power supply, a detector analog power supply and a detector digital power supply; the input end of one-level analog power supply is connected on power supply unit's output, one-level analog power supply's output with reference voltage source's input electricity is connected, reference voltage source's output respectively with ADC digital power supply's input with detector analog power supply's input electricity is connected, ADC digital power supply's output with photoelectric converter electricity is connected, detector analog power supply's output with non-refrigeration type infrared detector electricity is connected, detector digital power supply's input difference electricity is connected one-level analog power supply's output with on reference voltage power supply's the output, detector digital power supply's output with non-refrigeration type infrared detector electricity is connected, power supply unit's output still with the eyepiece electricity that images is connected.
2. The temperature control and power supply system of an infrared sighting telescope of claim 1, wherein: the primary analog power supply comprises a voltage stabilizing chip U1 with the model number LT3045, a VIN _1 pin, a VIN _2 pin and an EN/UV pin of the voltage stabilizing chip U1 are connected together, the VIN _1 pin of the voltage stabilizing chip U1 is connected to the output end of power supply equipment through an inductor L1, the VIN _1 pin of the voltage stabilizing chip U1 is further connected with an analog ground through an inductor L1 and a capacitor C1 in turn, the VIN _1 pin of the voltage stabilizing chip U1 is further connected with a +5V analog voltage, the VIN _1 pin of the voltage stabilizing chip U1 is further connected with the analog ground through a capacitor C2, a resistor R1 is connected between the analog ground connecting end of a capacitor C1 and the analog ground connecting end of a capacitor C2, the VIN _1 pin of the voltage stabilizing chip U1 is further connected with the analog ground through a capacitor C3, the EG pin of the voltage stabilizing chip U1 is connected with the analog ground, the analog ground connecting end of a capacitor C3 and the EG 1 are connected with the voltage stabilizing chip IM chip U1 through resistors R2, the PGFB pin of the voltage stabilizing chip U1 is connected with an analog ground through a resistor R3, the PGFB pin of the voltage stabilizing chip U1 is further connected with the OUT pin of the voltage stabilizing chip U1 through a resistor R4, the SET pin of the voltage stabilizing chip U1 is connected with the analog ground through a capacitor C4 and a resistor R5, the GND pin of the voltage stabilizing chip U1 is connected with the analog ground, the OUTS pin of the voltage stabilizing chip U1 is connected with the OUT pin of the voltage stabilizing chip U1, the OUT pin of the voltage stabilizing chip U1 is connected with the analog ground through a capacitor C5, and the OUT pin of the voltage stabilizing chip U1 is the output end of the primary analog power supply and outputs 4.5V voltage.
3. The temperature control and power supply system of an infrared sighting telescope of claim 1, wherein: the reference voltage power supply comprises a reference voltage source chip U2 with the model of ADR4540, a Vin pin of the reference voltage source chip U2 is connected to the output end of the primary analog power supply, a Vin pin of the reference voltage source chip U2 is also connected to an analog ground through a capacitor C6, a GND pin of the reference voltage source chip U2 is connected to the analog ground, a Vout pin of the reference voltage source chip U2 is connected to the analog ground through a capacitor C7, and a Vout pin of the reference voltage source chip U2 is the output end of the reference voltage power supply and outputs 4.096V voltage.
4. The temperature control and power supply system of an infrared sighting telescope of claim 1, wherein: the ADC digital power supply comprises an operational amplifier U3A with the model of LTC6253, wherein a homodromous input pin of the operational amplifier U3A is connected to the output end of the reference voltage power supply through a resistor R6, a homodromous input pin of the operational amplifier U3A is sequentially connected with an analog ground through a resistor R6 and a capacitor C8, a homodromous input pin of the operational amplifier U3A is connected with the analog ground through a capacitor C9 and a resistor R7, an inverted input pin of the operational amplifier U3A is connected to the output pin of the operational amplifier U3A, a V-pin of the operational amplifier U3A is connected with the analog ground, a V + pin of the operational amplifier U3A is connected to the output end of the first-level analog power supply, a V + pin of the operational amplifier U3A is connected with the analog ground through a capacitor C10, an output pin of the operational amplifier U3A is connected with the analog ground through a capacitor C11, and an output pin of the operational amplifier U3A is the output end of the ADC digital power supply, it outputs a voltage of 3.3V.
5. The temperature control and power supply system of an infrared sighting telescope of claim 1, wherein: the detector analog power supply comprises an operational amplifier U3B with the model of LTC6253, wherein a homodromous input pin of the operational amplifier U3B is connected to the output end of the reference voltage power supply through a resistor R8, a homodromous input pin of the operational amplifier U3B is sequentially connected with an analog ground through a resistor R8 and a capacitor C12, a homodromous input pin of the operational amplifier U3B is connected with the analog ground through a capacitor C13 and a resistor R9, an inverted input pin of the operational amplifier U3B is connected to an output pin of the operational amplifier U3B, an output pin of the operational amplifier U3B is connected with the analog ground through a capacitor C14, and an output pin of the operational amplifier U3B is the output end of the detector analog power supply and outputs 3.6V voltage.
6. The temperature control and power supply system of an infrared sighting telescope of claim 1, wherein: the digital detector power supply comprises an operational amplifier U4 with the model number being LT6202, wherein a homodromous input pin of the operational amplifier U4 is connected to the output end of the reference voltage power supply through a resistor R10, a homodromous input pin of the operational amplifier U4 is connected to an analog ground through a resistor R10 and a capacitor C15 in sequence, a homodromous input pin of the operational amplifier U4 is connected to the analog ground through a capacitor C16 and a resistor R11 respectively, a reverse input pin of the operational amplifier U4 is connected to an output pin of the operational amplifier U4, a GND pin of the operational amplifier U4 is connected to the analog ground, a VCC pin of the operational amplifier U4 is connected to the output end of the primary analog power supply, a VCC pin of the operational amplifier U4 is connected to the analog ground through a capacitor C17, an output pin of the operational amplifier U4 is connected to the digital ground through a capacitor C18, and an output pin of the operational amplifier U4 is the output end of the digital detector, it outputs a voltage of 1.8V.
7. The temperature control and power supply system of an infrared sighting telescope according to any one of claims 1 to 6, wherein: the temperature control system comprises an MAX1978 temperature controller, a temperature setting circuit, a current temperature input circuit, a power supply circuit and an electronic refrigeration heating sheet; the electronic refrigerating and heating sheet is arranged in the non-refrigerating infrared detector and is electrically connected to the output end of the MAX1978 temperature controller; a temperature sensor is also arranged in the non-refrigeration type infrared detector and is electrically connected with the input end of the MAX1978 temperature controller through the current temperature input circuit; the temperature setting circuit is electrically connected with the input end of the MAX1978 temperature controller; the input end of the power supply circuit is electrically connected to the output end of the power supply equipment, and the output end of the power supply circuit is electrically connected with the MAX1978 temperature controller and the current temperature input circuit respectively.
8. The temperature control and power supply system of an infrared sighting telescope of claim 7, wherein: the power supply circuit comprises an inductor L2, a resistor R12, a capacitor C19 and a capacitor C20, wherein one end of the inductor L2 is electrically connected to the output end of the power supply equipment, one end of the inductor L2 is connected to an analog ground through a capacitor C19, the other end of the inductor L2 is the output end of the power supply circuit and is connected to a digital ground through a capacitor C20, one end of the resistor R12 is connected to the analog ground, and the other end of the resistor R12 is connected to the digital ground.
9. The temperature control and power supply system of an infrared sighting telescope of claim 7, wherein: the current temperature input circuit comprises an operational amplifier U5A with the model number of AD8656, the same-direction input end of the operational amplifier U5A is electrically connected to the output end of the temperature sensor through a resistor R13, the same-direction input end of the operational amplifier U5A is also connected to digital ground through a capacitor C21, the reverse input end of the operational amplifier U5A is connected to the output end of the operational amplifier U5A, the ground end of the operational amplifier U5A is connected to digital ground, the power end of the operational amplifier U5A is connected to the output end of the power supply circuit, the power end of the operational amplifier U5A is also connected to digital ground through a capacitor C22 and a capacitor C23 respectively, one end of the output end of the operational amplifier U5A is connected to one end of a resistor R14, and the other end of the resistor R14 is the output end of the current temperature input circuit and is connected to digital ground through a capacitor C24;
the temperature setting circuit comprises an operational amplifier U5B with the model number of AD8656, wherein the same-direction input end of the operational amplifier U5B is connected with an external input device through a resistor R15, and the same-direction input end of the operational amplifier U5B is also connected with digital ground through a capacitor C25 and a capacitor C26 respectively; the inverting input end of the operational amplifier U5B is connected to the output end of the operational amplifier U5B, the output end of the operational amplifier U5B is electrically connected to one end of a resistor R16, the other end of the resistor R16 is the output end of the MAX1978 temperature setting circuit, and the other end of the resistor R16 is connected to the digital ground through a capacitor C27 and a capacitor C28 respectively.
10. The temperature control and power supply system of an infrared sighting telescope of claim 7, wherein: the MAX1978 temperature controller comprises a temperature control chip U6 with the model number of MAX 1978;
the FB-pin of the temperature control chip U6 is electrically connected with the output end of the current temperature input circuit through a resistor R17, and the FB-pin of the temperature control chip U6 is also connected with a digital ground through a resistor R18;
the FB + pin of the temperature control chip U6 is electrically connected to the output end of the temperature setting circuit through a resistor R19, and the FB + pin of the temperature control chip U6 is also connected to digital ground through a capacitor C29, a capacitor C30 and a capacitor C31 respectively;
the SHDN pin of the temperature control chip U6 is connected with a digital ground through a resistor R20, the SHDN pin of the temperature control chip U6 is also connected with the output end of the power supply circuit through a resistor R21, the SHDN pin of the temperature control chip U6 is also connected with an analog ground through the source electrode and the drain electrode of a field-effect tube Q1, the grid electrode of the field-effect tube Q1 is connected with an external switch through a resistor R22, and the grid electrode of the field-effect tube Q1 is also connected with the output end of the power supply circuit through a resistor R22 and a resistor R23 in sequence;
a PGND0 pin, a PGND1 pin, a PGND2 pin and a PGND3 pin of the temperature control chip U6 are all connected with a digital ground;
the LX2_0 pin, the LX2_1 pin and the LX2_2 pin of the temperature control chip U6 are connected together and then connected to the negative electrode of the electronic refrigeration heating plate through an inductor L3, and the LX2_0 pin, the LX2_1 pin and the LX2_2 pin of the temperature control chip U6 are connected together and then sequentially connected to a digital ground through an inductor L6 and a capacitor C32; the pin LX2_0, the pin LX2_1 and the pin LX2_2 of the temperature control chip U6 are connected together and then are connected to the anode of the electronic refrigeration heating plate through an inductor L6 and a capacitor C33 in sequence;
the pin OS2 of the temperature control chip U6 is connected with a digital ground through a capacitor C32, the pin OS2 of the temperature control chip U6 is further connected with the digital ground through a capacitor C34 and a capacitor C35 in sequence, and the pin OS2 of the temperature control chip U6 is further connected to the anode of the electronic refrigeration heating sheet through a capacitor C34 and a resistor R24 in sequence;
the OS1 pin of the temperature control chip U6 is connected to the anode of the electronic refrigeration heating sheet;
the CS pin of the temperature control chip U6 is connected to the anode of the electronic refrigeration heating sheet through a resistor R24, the CS pin of the temperature control chip U6 is connected to digital ground through a capacitor C35, and the CS pin of the temperature control chip U6 is connected to digital ground through a capacitor C34 and a capacitor C32 in sequence;
the LX1_0 pin, the LX1_1 pin and the LX1_2 pin of the temperature control chip U6 are connected together and then sequentially connected to the anode of the electronic refrigeration heating plate through an inductor L4 and a resistor R24, the LX1_0 pin, the LX1_1 pin and the LX1_2 pin of the temperature control chip U6 are connected together and sequentially connected to the digital ground through an inductor L4 and a capacitor C35, and the LX1_0 pin, the LX1_1 pin and the LX1_2 pin of the temperature control chip U6 are connected together and sequentially connected to the digital ground through an inductor L4, a capacitor C34 and a capacitor C32;
the PVDD0 pin, the PVDD1 pin, the PVDD2 pin and the PVDD3 pin of the temperature-controlled chip U6 are all connected with the output end of the power supply circuit, and the PVDD0 pin, the PVDD1 pin, the PVDD2 pin and the PVDD3 pin of the temperature-controlled chip U6 are connected together and then respectively connected with the digital ground through a capacitor C36, a capacitor C37, a capacitor C38 and a capacitor C39.
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