CN116799748B - Automatic protection circuit for night vision full-color illuminance of image intensifier - Google Patents
Automatic protection circuit for night vision full-color illuminance of image intensifier Download PDFInfo
- Publication number
- CN116799748B CN116799748B CN202311083001.2A CN202311083001A CN116799748B CN 116799748 B CN116799748 B CN 116799748B CN 202311083001 A CN202311083001 A CN 202311083001A CN 116799748 B CN116799748 B CN 116799748B
- Authority
- CN
- China
- Prior art keywords
- resistor
- triode
- potentiometer
- twenty
- operational amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000004297 night vision Effects 0.000 title claims abstract description 9
- 238000000605 extraction Methods 0.000 claims abstract description 3
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000005286 illumination Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 239000003623 enhancer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Amplifiers (AREA)
Abstract
The invention discloses a night vision full-color illumination automatic protection circuit of an image intensifier, which relates to the technical field of photoelectric detection and comprises the image intensifier, a protection circuit and a control circuit, wherein the protection circuit comprises a first potentiometer, a second resistor, a third resistor, a fourth resistor, a first triode, a first connecting end and a second connecting end, one end of the first potentiometer is connected with the second connecting end, the other end of the first potentiometer, a first potentiometer extraction end, one end of the second resistor and a base electrode of the first triode are connected, a collector electrode of the first triode is connected with the first connecting end and the fourth resistor, the first connecting end is connected with the image intensifier, an emitter electrode of the first triode is connected with one end of the third resistor, and the other end of the second resistor, the other end of the third resistor and a grounding end are connected. The invention has global limitation, and on the basis of the limitation, only the threshold value part exceeding a certain illumination intensity can be limited independently, and the cutting-off is not carried out in the use process.
Description
Technical Field
The invention relates to the technical field of photoelectric detection, in particular to an automatic protection circuit for night vision full-color illuminance of an image intensifier.
Background
A publication number; CN216564497U discloses an automatic illuminance protection circuit for an image intensifier, which can make the image intensifier cut off the power supply of the image intensifier rapidly and automatically when the image intensifier encounters external strong light irradiation, so as to prevent the strong light from burning the light cathode surface of the image intensifier. However, the enhancer is in an unregulated state after being cut off, that is, when the enhancer is cut off by external strong light, some night vision instruments cannot be used well.
Disclosure of Invention
The invention aims to provide an automatic protection circuit for night vision full-color illuminance of an image intensifier, which comprises the image intensifier, a protection circuit and a control circuit, wherein a first potentiometer R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first triode Q1, a first connecting end P1 and a second connecting end P2 are arranged, one end of the first potentiometer R1 is connected with the second connecting end P2, the other end of the first potentiometer R1, one end of the second resistor R2 and a base electrode of the first triode Q1 are connected, a collector electrode of the first triode Q1 is connected with the first connecting end P1 and the fourth resistor R4, the first connecting end P1 is connected with the image intensifier, an emitter electrode of the first triode Q1 is connected with one end of the third resistor R3, and the other end of the second resistor R2 and the other end of the third resistor R3 are connected with a grounding end.
Further, the protection circuit further comprises a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a second triode Q2, a third triode Q3, a first operational amplifier U1, a second operational amplifier U2 and a third digital potentiometer U3, one end of the fifth resistor R5 is connected with one end of the first operational amplifier U1, one end of the sixth resistor R6 is connected with one end of the second operational amplifier U2, the other end of the sixth resistor R6 is connected with the same phase end of the second operational amplifier U2, the 4 pin and the 12 pin of the third digital potentiometer U3 are connected with a power supply, the 3 pin of the third digital potentiometer U3 is connected with one end of the seventh resistor R7, the 11 pin and the 10 pin of the third digital potentiometer U3 are connected with one end of the eighth resistor R8, one end of the third digital potentiometer U3 is connected with one end of the third triode Q2, one end of the third triode Q2 is connected with one end of the third resistor R10, one end of the ninth resistor R9, one end of the third triode Q2 is connected with one end of the third triode Q2, the other end of the third triode Q2 is connected with the third resistor R3, the other end of the third resistor R10 is connected with the other end of the third resistor R3, the third resistor R11 is connected with the other end of the third resistor R3, the third resistor R3 is connected with the other end of the third resistor R11, and the other end is connected with the third resistor R3.
Further, the protection circuit further includes a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a fourth MOS transistor Q4, a third connection end P3, a fourth operational amplifier U4, and a first switch S1, where one end of the thirteenth resistor R13 is connected to the gate of the fourth MOS transistor Q4 and the output end of the fourth operational amplifier U4, the inverting end of the fourth operational amplifier U4 is connected to the output end of the first operational amplifier U1, the source of the fourth MOS transistor Q4 is connected to one end of the fourteenth resistor R14 and one end of the fifteenth resistor R15, the other end of the fourteenth resistor R14 is connected to the power supply, the drain of the fourth MOS transistor Q4 is connected to the first input end of the first switch S1, the second input end of the first switch S1 is connected to the output end of the second operational amplifier U2, the common output end of the first switch S1 is connected to one end of the seventh resistor R7, the negative electrode of the first switch S1 is connected to the ground, and the positive electrode of the first switch S1 is connected to the third connection end P3.
Further, the protection circuit further includes a sixteenth resistor R16, a seventeenth resistor R17, a fifth triode Q5, and a fourth connection end P4, where one end of the sixteenth resistor R16 is connected to the power supply, the other end of the sixteenth resistor R16 is connected to the emitter of the fifth triode Q5, the base of the fifth triode Q5 is connected to one end of the seventeenth resistor R17, the fourth connection end P4 is connected, the collector of the fifth triode Q5 is connected to the collector of the second triode Q2, and the other end of the seventeenth resistor R17 is connected to the ground.
Further, the protection circuit further comprises an eighteenth potentiometer R18 and a nineteenth resistor R19, one end of the eighteenth potentiometer R18 is connected with a power supply, the other end of the eighteenth potentiometer R18, the tap end of the eighteenth potentiometer R18 and the inverting end of the second operational amplifier U2, one end of the nineteenth resistor R19 is connected, and the other end of the nineteenth resistor R19 is connected with a grounding end.
Further, the protection circuit further comprises a twentieth resistor R20 and a first capacitor C1, one end of the twentieth resistor R20 is connected with a power supply, the other end of the twentieth resistor R20 is connected with one end of the first capacitor C1, and the other end of the first capacitor C1 is connected with a grounding end.
Further, the protection circuit further includes a twenty-first potentiometer R21 and a twenty-second resistor R22, wherein one end of the twenty-first potentiometer R21 is connected with a power supply, the other end of the twenty-first potentiometer R21, a tap end of the twenty-first potentiometer R21, an in-phase end of the fourth operational amplifier U4 and one end of the twenty-second resistor R22 are connected, and the other end of the twenty-second resistor R22 is connected with a ground end.
Further, the control circuit comprises a first relay K1, a second switch S2 and a twenty-third resistor R23, one end of the twenty-third resistor R23 is connected with a power supply, the other end of the twenty-third resistor R23 is connected with one end of the second switch S2, the other end of the second switch S2 is connected with one end of a coil of the first relay K1, an auxiliary contact of the first relay K1 is connected with a third connecting end P3, and the other end of the coil of the first relay K1, the other end of an auxiliary contact of the first relay K1 and a grounding end are connected.
Further, the control circuit comprises a second relay K2, a third switch S3 and a twenty-fourth resistor R24, one end of the twenty-fourth resistor R24 is connected with a power supply, the other end of the twenty-fourth resistor R24 is connected with one end of the third switch S3, the other end of the third switch S3 is connected with one end of a coil of the second relay K2, an auxiliary contact of the second relay K2 is connected with a fourth connecting end P4, and the other end of the coil of the second relay K2, the other end of an auxiliary contact of the second relay K2 and a grounding end are connected.
Compared with the prior art, the invention has the beneficial effects that:
the invention has global limitation, and on the basis of the limitation, only the threshold value part exceeding a certain illumination intensity can be limited independently, and the cutting-off is not carried out in the use process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the prior art and the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an overall structure provided by the present invention.
Fig. 2 is a schematic diagram of a protection circuit structure.
Fig. 3 is a schematic diagram of a control circuit structure.
Detailed Description
In order that the objects and advantages of the invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, it being understood that the following text is only intended to describe one or more specific embodiments of the invention and is not intended to limit the scope of the invention as defined in the appended claims.
Referring to the drawings, the invention relates to a night vision full-color illumination automatic protection circuit of an image intensifier, which comprises the image intensifier, a protection circuit and a control circuit, wherein a first potentiometer R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first triode Q1, a first connecting end P1 and a second connecting end P2 are arranged, one end of the first potentiometer R1 is connected with the second connecting end P2, the other end of the first potentiometer R1, the extraction end of the first potentiometer R1, one end of the second resistor R2 is connected with the base electrode of the first triode Q1, the collector electrode of the first triode Q1 is connected with the first connecting end P1 and the fourth resistor R4, the first connecting end P1 is connected with the image intensifier, the emitter electrode of the first triode Q1 is connected with one end of the third resistor R3, and the other end of the second resistor R2 is connected with the other end of the third resistor R3.
Preferably, the protection circuit further includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a second triode Q2, a third triode Q3, a first operational amplifier U1, a second operational amplifier U2, and a third digital potentiometer U3, one end of the fifth resistor R5 is connected to the inverting end of the first operational amplifier U1, one end of the sixth resistor R6 is connected to the non-inverting end of the second operational amplifier U2, the other end of the sixth resistor R6 is connected to the non-inverting end of the second operational amplifier U2, the 4 pin, the 12 pin of the third digital potentiometer U3 is connected to a power supply, the 3 pin of the third digital potentiometer U3 is connected to one end of the eighth resistor R8, the 11 pin, the 10 pin of the third digital potentiometer U3 is connected to one end of the eighth resistor R3, one end of the base of the second triode Q2 is connected to one end of the third digital potentiometer U3, the other end of the third resistor R10 pin, the ninth resistor R9 is connected to one end of the base of the third triode Q2, the other end of the third triode Q2 is connected to the non-inverting end of the third resistor R3, the other end of the third resistor R3 is connected to the eleventh resistor R7, the other end of the third resistor R3 is connected to the other end of the third resistor R3, and the other end of the third resistor R3 is connected to the non-inverting end of the third resistor R3, and the other end of the third resistor is connected to the third resistor R3.
Preferably, the protection circuit further includes a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a fourth MOS transistor Q4, a third connection end P3, a fourth operational amplifier U4, and a first switch S1, where one end of the thirteenth resistor R13 is connected to the gate of the fourth MOS transistor Q4 and the output end of the fourth operational amplifier U4, the inverting end of the fourth operational amplifier U4 is connected to the output end of the first operational amplifier U1, the source of the fourth MOS transistor Q4 is connected to one end of the fourteenth resistor R14 and one end of the fifteenth resistor R15, the other end of the fourteenth resistor R14 is connected to the power supply, the drain of the fourth MOS transistor Q4 is connected to the first input end of the first switch S1, the second input end of the first switch S1 is connected to the output end of the second operational amplifier U2, the common output end of the first switch S1 is connected to one end of the seventh resistor R7, the negative electrode of the first switch S1 is connected to the ground, and the positive electrode of the first switch S1 is connected to the third connection end P3.
Preferably, the protection circuit further includes a sixteenth resistor R16, a seventeenth resistor R17, a fifth triode Q5, and a fourth connection end P4, where one end of the sixteenth resistor R16 is connected to a power supply, the other end of the sixteenth resistor R16 is connected to an emitter of the fifth triode Q5, a base of the fifth triode Q5 is connected to one end of the seventeenth resistor R17, the fourth connection end P4 is connected, a collector of the fifth triode Q5 is connected to a collector of the second triode Q2, and the other end of the seventeenth resistor R17 is connected to a ground terminal.
Preferably, the protection circuit further comprises an eighteenth potentiometer R18 and a nineteenth resistor R19, one end of the eighteenth potentiometer R18 is connected with a power supply, the other end of the eighteenth potentiometer R18, a tap end of the eighteenth potentiometer R18 and an inverting end of the second operational amplifier U2, one end of the nineteenth resistor R19 is connected, and the other end of the nineteenth resistor R19 is connected with a ground end.
Preferably, the protection circuit further comprises a twentieth resistor R20 and a first capacitor C1, one end of the twentieth resistor R20 is connected with a power supply, the other end of the twentieth resistor R20 is connected with one end of the first capacitor C1, and the other end of the first capacitor C1 is connected with a ground terminal.
Preferably, the protection circuit further includes a twenty-first potentiometer R21 and a twenty-second resistor R22, wherein one end of the twenty-first potentiometer R21 is connected to a power supply, the other end of the twenty-first potentiometer R21, a tap end of the twenty-first potentiometer R21, an in-phase end of the fourth operational amplifier U4 and one end of the twenty-second resistor R22 are connected, and the other end of the twenty-second resistor R22 is connected to a ground end.
Preferably, the control circuit comprises a first relay K1, a second switch S2 and a twenty-third resistor R23, one end of the twenty-third resistor R23 is connected with a power supply, the other end of the twenty-third resistor R23 is connected with one end of the second switch S2, the other end of the second switch S2 is connected with one end of a coil of the first relay K1, an auxiliary contact of the first relay K1 is connected with a third connecting end P3, and the other end of the coil of the first relay K1, the other end of an auxiliary contact of the first relay K1 and a grounding end are connected.
Preferably, the control circuit comprises a second relay K2, a third switch S3 and a twenty-fourth resistor R24, one end of the twenty-fourth resistor R24 is connected with a power supply, the other end of the twenty-fourth resistor R24 is connected with one end of the third switch S3, the other end of the third switch S3 is connected with one end of a coil of the second relay K2, an auxiliary contact of the second relay K2 is connected with a fourth connecting end P4, and the other end of the coil of the second relay K2, the other end of an auxiliary contact of the second relay K2 and a grounding end are connected.
In this embodiment, the fourth resistor R4 is connected to the adjustment signal, the second connection terminal P2 is connected to the power supply, and the fourth resistor R4 and the first connection terminal P1 are fed back to the image intensifier, the first potentiometer R1 and the second resistor R2 are used for biasing the base of the first triode Q1, the third resistor R3 is used for the loop of the first triode Q1, and when the adjustment is performed, the knob of the first potentiometer R1 is adjusted to change the bias voltage of the base of the first triode Q1, so that the potential of the fourth resistor R4 is pulled down or pulled up, thereby limiting the adjustment signal output from the first connection terminal P1 to the image intensifier.
In this embodiment, considering the independence of the circuit and limiting the signal to be subsequently input to the second connection terminal P2 after adjustment, the connection between the fourth resistor R4 and the adjustment signal and the connection between the second connection terminal P2 and the power supply are disconnected, the fourth resistor R4 and one end of the twelfth resistor R12 are connected, the adjustment signal is input to the second connection terminal P2, the output terminal of the second operational amplifier U2 is directly connected to the 5 pin of the third digital potentiometer U3 by skipping the first switch S1, the signal fed back to the base of the first triode Q1 at the same time of the third digital potentiometer U3 is also fed back to the first operational amplifier U1, the inverting terminal of the second operational amplifier U2 is set with an independent reference potential by the power supply, the amplitude of which is the maximum threshold of the required limiting enhancement signal, and in the initial state, i.e. when the maximum threshold is not reached, the second operational amplifier U2 has no output, at this time, the 11 pin distance 12 or 10 direction of the third digital potentiometer U3 is adjusted, so that the third digital potentiometer U3 enters a high-resistance state, the potential of the ninth resistor R9 is reduced, the second triode Q2 is turned off or is about to enter an amplifying state, at this time, when the second connecting end P2 inputs the first triode Q1 to enter a saturation region, the first connecting end P1 is in a low potential state, meanwhile, the input of the second connecting end P2 is fed back to the same-phase end of the first operational amplifier U1 through the first potentiometer R1, the first operational amplifier U1 is fed back to the same-phase end of the second operational amplifier U2 through the fifth resistor R5 and the sixth resistor R6, the second operational amplifier U2 outputs, the 11 pin of the third digital potentiometer U3 is reversely adjusted, the second triode Q2 amplifies, the collector end of the second triode Q2 skips the fifth triode Q5 and the sixteenth resistor R16 in this embodiment to be directly connected with a power supply, when the second triode Q2 is amplified, a feedback signal is fed back to the third triode Q3, the third triode Q3 is conducted and then fed back to the emitter of the first triode Q1, the first triode Q1 enters a state approaching reverse bias, the input of the second connecting end P2 is limited, the first connecting end P1 still outputs a high-potential adjusting signal to the image intensifier, when the second operational amplifier U2 does not output the signal, the third digital potentiometer U3 is reversely adjusted again, the first triode Q1 is converted into an amplified state from the state approaching reverse bias, that is, when the adjusting signal input by the second connecting end P2 is too high, the potential of the first connecting end P1 is increased when the output of the first connecting end P1 is too low, the exceeding of the threshold value is limited, and otherwise reset.
In this embodiment, considering that the function used may need the minimum threshold to ensure the minimum brightness, and control by the same back-stage circuit, the in-phase end of the fourth operational amplifier U4 is set with an independent reference potential through the power supply, the amplitude of the reference potential is the minimum threshold of the required limiting enhancement signal, the signal output by the first operational amplifier U1 is fed back to the inverting end of the fourth operational amplifier U4, when the mode is adopted, the steering signal is input to the third connection end P3, the first transfer switch S1 changes the direction of the input end, when the threshold is not lower than the minimum threshold, the fourth operational amplifier U4 does not output, the gate to the source of the fourth MOS transistor Q4 is in conduction negative pressure difference, the fourth MOS transistor Q4 is turned on, the power supply signal at the end of the fourteenth resistor R14 is fed back to the 5 pins of the third digital potentiometer U3 through the fourth MOS transistor Q4 and the first transfer switch S1, the initial state of the third digital potentiometer U3 is changed, the third digital potentiometer U3 is put into a low resistance state, the second transistor Q2 is put into a saturated state, when the first transistor Q1 is put into a low state, the first transistor Q1 is put into a state, when the first transistor Q1 is put into a state, and the low state, and the second transistor Q1 is put into a state, and the state is put into a state, and near the first transistor.
In this embodiment, the collector of the second triode Q2 is disconnected from the power supply, the fifth triode Q5 is connected in series, the fourth connection terminal P4 is used for inputting a stop signal, the seventeenth resistor R17 is used for the fifth triode Q5 loop, the sixteenth resistor R16 is used for limiting the current of the fifth triode Q5, the eighteenth resistor R18 and the nineteenth resistor R19 are used for configuring the reference potential of the inverting terminal of the second operational amplifier U2, the twenty first resistor R21 and the twenty second resistor R22 are used for configuring the reference potential of the non-inverting terminal of the fourth operational amplifier U4, and if the two limiting modes are in the same proportion and correspond to each other, one group of the eighteenth resistor R18, the nineteenth resistor R19, the twenty first resistor R21 and the twenty second resistor R22 can be used in a connected mode, and the twentieth resistor R20 and the first capacitor C1 are auxiliary power supplies of the circuit. The twenty-third resistor R23 and the twenty-fourth resistor R24 are used for limiting the current of the first relay K1 and the second relay K2, the second switch S2 is a signal switch for converting a limiting mode, and the third switch S3 is a signal switch with a start-stop limiting function.
Claims (3)
1. The automatic protection circuit is characterized by comprising an image intensifier, a protection circuit and a control circuit, wherein the protection circuit comprises a first potentiometer, a second resistor, a third resistor, a fourth resistor, a first triode, a first connecting end and a second connecting end, one end of the first potentiometer is connected with the second connecting end, the other end of the first potentiometer, one end of the second resistor and a base electrode of the first triode are connected, a collector electrode of the first triode is connected with the first connecting end and the fourth resistor, the first connecting end is connected with the image intensifier, an emitter electrode of the first triode is connected with one end of the third resistor, and the other end of the second resistor, the other end of the third resistor and a grounding end are connected;
the protection circuit further comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a second triode, a third triode, a first operational amplifier, a second operational amplifier and a third digital potentiometer, wherein one end of the fifth resistor is connected with the inverting end of the first operational amplifier, one end of the sixth resistor is connected with the same phase end of the second operational amplifier, the other end of the sixth resistor is connected with the same phase end of the second operational amplifier, the 4 pin and the 12 pin of the third digital potentiometer are connected with one end of the seventh resistor, the 5 pin of the third digital potentiometer is connected with one end of the seventh resistor, one end of the third digital potentiometer is connected with one end of the eighth resistor, the 11 pin, 10 pin of the third digital potentiometer, one end of the ninth resistor is connected with the base electrode of the second triode, the emitter of the second triode is connected with one end of the tenth resistor, the collector of the third triode is connected with one end of the eleventh resistor, the other end of the eleventh resistor is connected with one end of the fourth resistor, the third emitter of the third triode is connected with one end of the third resistor, the other end of the third resistor is connected with the other end of the third resistor, the seventh resistor is connected with the other end of the eighth resistor, the other end of the eighth resistor is connected with the eighth resistor;
the protection circuit further comprises a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a fourth MOS tube, a third connecting end, a fourth operational amplifier and a first change-over switch, wherein one end of the thirteenth resistor is connected with the grid electrode of the fourth MOS tube and the output end of the fourth operational amplifier, the inverting end of the fourth operational amplifier is connected with the output end of the first operational amplifier, the source electrode of the fourth MOS tube is connected with one end of the fourteenth resistor and one end of the fifteenth resistor, the other end of the fourteenth resistor is connected with a power supply, the drain electrode of the fourth MOS tube is connected with the first input end of the first change-over switch, the second input end of the first change-over switch is connected with the output end of the second operational amplifier, the public output end of the first change-over switch is connected with one end of the seventh resistor, the cathode of the first change-over switch is connected with the grounding end, and the first change-over switch Guan Zhengji is connected with the third connecting end;
the protection circuit further comprises a sixteenth resistor, a seventeenth resistor, a fifth triode and a fourth connecting end, wherein one end of the sixteenth resistor is connected with a power supply, the other end of the sixteenth resistor is connected with an emitter of the fifth triode, a base electrode of the fifth triode is connected with one end of the seventeenth resistor, the fourth connecting end is connected with a collector electrode of the fifth triode is connected with a collector electrode of the second triode, and the other end of the seventeenth resistor is connected with a grounding end;
the protection circuit also comprises an eighteenth potentiometer and a nineteenth resistor, one end of the eighteenth potentiometer is connected with a power supply, the other end of the eighteenth potentiometer, the extraction end of the eighteenth potentiometer and the inverting end of the second operational amplifier are connected, one end of the nineteenth resistor is connected, and the other end of the nineteenth resistor is connected with a grounding end.
2. The automatic protection circuit for night vision full-color illuminance of an image intensifier according to claim 1, wherein the protection circuit further comprises a twentieth resistor and a first capacitor, one end of the twentieth resistor is connected with a power supply, the other end of the twentieth resistor is connected with one end of the first capacitor, and the other end of the first capacitor is connected with a ground terminal.
3. The automatic protection circuit for night vision full-color illuminance of an image intensifier according to claim 1, wherein the protection circuit further comprises a twenty-first potentiometer and a twenty-second resistor, one end of the twenty-first potentiometer is connected with a power supply, the other end of the twenty-first potentiometer, the tap end of the twenty-first potentiometer, the in-phase end of the fourth operational amplifier and one end of the twenty-second resistor are connected, and the other end of the twenty-second resistor is connected with a grounding end;
the control circuit comprises a first relay, a second switch and a twenty-third resistor, one end of the twenty-third resistor is connected with a power supply, the other end of the twenty-third resistor is connected with one end of the second switch, the other end of the second switch is connected with one end of a first relay coil, a first relay auxiliary contact is connected with a third connecting end, and the other end of the first relay coil, the other end of the first relay auxiliary contact and a grounding end are connected;
the control circuit comprises a second relay, a third switch and a twenty-fourth resistor, one end of the twenty-fourth resistor is connected with a power supply, the other end of the twenty-fourth resistor is connected with one end of the third switch, the other end of the third switch is connected with one end of a second relay coil, an auxiliary contact of the second relay is connected with a fourth connecting end, and the other end of the second relay coil, the other end of the auxiliary contact of the second relay and a grounding end are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311083001.2A CN116799748B (en) | 2023-08-28 | 2023-08-28 | Automatic protection circuit for night vision full-color illuminance of image intensifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311083001.2A CN116799748B (en) | 2023-08-28 | 2023-08-28 | Automatic protection circuit for night vision full-color illuminance of image intensifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116799748A CN116799748A (en) | 2023-09-22 |
| CN116799748B true CN116799748B (en) | 2023-11-14 |
Family
ID=88046407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311083001.2A Active CN116799748B (en) | 2023-08-28 | 2023-08-28 | Automatic protection circuit for night vision full-color illuminance of image intensifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116799748B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117318271B (en) * | 2023-11-23 | 2024-03-15 | 深圳市华图测控系统有限公司 | Low-voltage-drop dual-power supply circuit |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552458A (en) * | 2008-12-29 | 2009-10-07 | 浙江中凯科技股份有限公司 | Protective circuit of a control and protection switch |
| CN201663431U (en) * | 2010-04-02 | 2010-12-01 | 赵俊勇 | Internal and external leakage protection device of electric water heater |
| CN204967241U (en) * | 2014-11-06 | 2016-01-13 | 红河学院 | Plateau high -tension electricity motor protection circuit |
| CN205791455U (en) * | 2016-06-08 | 2016-12-07 | 深圳市莫廷影像技术有限公司 | A kind of luminous power exceeds standard and reports to the police and power-off protecting circuit |
| CN106655108A (en) * | 2017-03-01 | 2017-05-10 | 江苏北方湖光光电有限公司 | Non-rechargeable battery-powered inverse connection protection and low-voltage alarm circuit for night-vision device |
| CN106711940A (en) * | 2016-12-16 | 2017-05-24 | 山东北方光学电子有限公司 | Protection circuit used for low-light level night vision device |
| CN107613622A (en) * | 2017-09-30 | 2018-01-19 | 胡振锋 | A kind of intelligent desk lamp control device |
| CN210927206U (en) * | 2019-12-17 | 2020-07-03 | 南京民联仪器制造有限公司 | Charge-discharge control circuit of solar energy collecting power supply |
| CN216564497U (en) * | 2021-10-21 | 2022-05-17 | 河南平原光电有限公司 | Automatic protection circuit for illuminance of image intensifier |
| WO2023014595A1 (en) * | 2021-08-05 | 2023-02-09 | Cisco Technology, Inc. | Fault managed power system |
| CN219247467U (en) * | 2022-12-30 | 2023-06-23 | 江阴乐华电器有限公司 | Circuit control protector |
| CN116526847A (en) * | 2023-06-28 | 2023-08-01 | 广州谐同电子科技有限公司 | Switching power supply circuit with protection adjustment function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102754326B (en) * | 2010-02-09 | 2014-12-03 | 株式会社日立医疗器械 | Power conversion device, X-ray CT device, and X-ray image taking device |
-
2023
- 2023-08-28 CN CN202311083001.2A patent/CN116799748B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552458A (en) * | 2008-12-29 | 2009-10-07 | 浙江中凯科技股份有限公司 | Protective circuit of a control and protection switch |
| CN201663431U (en) * | 2010-04-02 | 2010-12-01 | 赵俊勇 | Internal and external leakage protection device of electric water heater |
| CN204967241U (en) * | 2014-11-06 | 2016-01-13 | 红河学院 | Plateau high -tension electricity motor protection circuit |
| CN205791455U (en) * | 2016-06-08 | 2016-12-07 | 深圳市莫廷影像技术有限公司 | A kind of luminous power exceeds standard and reports to the police and power-off protecting circuit |
| CN106711940A (en) * | 2016-12-16 | 2017-05-24 | 山东北方光学电子有限公司 | Protection circuit used for low-light level night vision device |
| CN106655108A (en) * | 2017-03-01 | 2017-05-10 | 江苏北方湖光光电有限公司 | Non-rechargeable battery-powered inverse connection protection and low-voltage alarm circuit for night-vision device |
| CN107613622A (en) * | 2017-09-30 | 2018-01-19 | 胡振锋 | A kind of intelligent desk lamp control device |
| CN210927206U (en) * | 2019-12-17 | 2020-07-03 | 南京民联仪器制造有限公司 | Charge-discharge control circuit of solar energy collecting power supply |
| WO2023014595A1 (en) * | 2021-08-05 | 2023-02-09 | Cisco Technology, Inc. | Fault managed power system |
| CN216564497U (en) * | 2021-10-21 | 2022-05-17 | 河南平原光电有限公司 | Automatic protection circuit for illuminance of image intensifier |
| CN219247467U (en) * | 2022-12-30 | 2023-06-23 | 江阴乐华电器有限公司 | Circuit control protector |
| CN116526847A (en) * | 2023-06-28 | 2023-08-01 | 广州谐同电子科技有限公司 | Switching power supply circuit with protection adjustment function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116799748A (en) | 2023-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116799748B (en) | Automatic protection circuit for night vision full-color illuminance of image intensifier | |
| CN116526847B (en) | Switching power supply circuit with protection adjustment function | |
| CN101375499A (en) | Current mirror circuit | |
| CN219247467U (en) | Circuit control protector | |
| CN116742426A (en) | Electric connector with operation protection function | |
| US4933563A (en) | Infra-red receiver | |
| CN102833917A (en) | LED constant-current control circuit and LED liquid crystal television | |
| CN212210475U (en) | Overcurrent and overvoltage self-locking protection circuit | |
| CN116470856B (en) | Demodulation weak signal amplifying circuit of optical fiber sensor | |
| CN108829170B (en) | Linear voltage stabilizing circuit with overcurrent protection | |
| CN209419195U (en) | A kind of power voltage step down output overvoltage protection circuit and power supply | |
| CN211352552U (en) | LED lighting circuit with short-circuit protection function | |
| CN106685203B (en) | A kind of Buck converter of overcurrent shutdown protection | |
| CN107147210B (en) | Light-operated type solar power supply circuit | |
| CN107910849B (en) | Overvoltage, reverse connection and power failure protection circuit | |
| CN211296165U (en) | Over-temperature protection structure of CMOS (complementary Metal oxide semiconductor) process | |
| CN117359492B (en) | Flange plate surface leveling control system | |
| CN111162765A (en) | Experimental MOSFET (Metal-oxide-semiconductor field Effect transistor) and BJT (Bipolar junction transistor) cascade voltage amplification circuit | |
| CN109274064A (en) | A kind of power protecting circuit | |
| CN205646780U (en) | Novel DC changes DC's constant current constant voltage protection circuit | |
| CN220605773U (en) | Automatic code dialing circuit and voltage doubling circuit | |
| KR910003976A (en) | Power supply circuit for telephone | |
| CN221328932U (en) | Ultra-low negative pressure detection dual protection circuit | |
| CN213280065U (en) | Horn with protection circuit | |
| CN104167708B (en) | Over-current protection circuit and lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |