CN106125545B - Light protection control device adopting illuminance threshold and illuminance increase rate detection - Google Patents
Light protection control device adopting illuminance threshold and illuminance increase rate detection Download PDFInfo
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- 230000005540 biological transmission Effects 0.000 claims description 3
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- 238000005286 illumination Methods 0.000 abstract description 10
- 239000011521 glass Substances 0.000 description 4
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B9/00—Safety arrangements
- G05B9/02—Safety arrangements electric
- G05B9/03—Safety arrangements electric with multiple-channel loop, i.e. redundant control systems
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Abstract
The invention discloses a light protection control device adopting illuminance threshold and illuminance increase rate detection, which comprises an illuminance sensor, a light protection control module and a light protection module, wherein the illuminance sensor is used for collecting illuminance signals and converting the illuminance signals into voltage signals; the signal processing module is used for converting the increase rate of the illuminance signal into a pulse signal and adjusting the amplitude of the illuminance signal; the timing logic control module comprises a plurality of timing circuits, and triggers timing control when the increase rate of the illuminance signal or the illuminance amplitude reaches a threshold value; the high-voltage module generates high voltage and acts on the PLZT to enable the PLZT to be in a light-transmitting state when the enable end of the high-voltage module is opened; the voltage adjusting module realizes the functions of enabling the high-voltage module and adjusting the given voltage of the high-voltage module, and adjusts the output voltage of the high-voltage module along with the illumination intensity, so that the light transmittance of the PLZT is adjusted; and the discharging module is used for rapidly discharging the two ends of the PLZT when the illuminance signal or the illuminance increase rate signal triggers the timing circuit, so that the PLZT lens is in a light-tight state.
Description
Technical Field
The invention relates to the field of light protection control, in particular to a light protection control device based on illuminance threshold and illuminance increase rate detection, which can be widely applied to laser goggles and nuclear flash helmets.
Background
In modern war, it is advisable to use automatic forms of light protection technology. The first type of the commonly adopted anti-flash helmet adopts the cylinder ignition and explosion caused by the photoelectric effect to push the piston to put down the protective glasses in about 10ms, thereby playing the role of a 'flash isolation wall'. The second is that the anti-flash goggles with PLZT electrode plate are like common goggles in normal times, and when strong flash occurs, the instantaneous transmittance of the lens is almost reduced to 0, thus protecting the glasses from being damaged. Domestic light protection controlling means only detects the light intensity, can not detect the rate of change of light intensity, also can not realize following the automation of illuminance yet, can not play the purpose of preventing flash fast like this. The device can improve the anti-flash speed by detecting the light pulse, achieves the aim of redundancy by detecting the illumination intensity and improves the safety. The automatic following of the illumination can be realized, and the illumination within a specified range can be maintained.
Disclosure of Invention
The invention aims to provide a light protection control device which can deal with the damage of strong laser weapons and nuclear flash to eyes of pilots and ground armed personnel and avoid light blindness.
The technical scheme adopted by the invention for solving the technical problems is as follows:
provided is a light protection control device using illuminance threshold and illuminance increase rate detection, including:
the illuminance sensor is used for collecting illuminance signals and converting the illuminance signals into illuminance voltage signals;
the signal processing module adopts one path of signal and two paths of signal processing, the first path converts the growth rate of the illuminance signal into a pulse signal according to the illuminance voltage signal, the second path adjusts the amplitude of the illuminance voltage signal, and the two paths of processed signals are respectively connected to the timing logic control module;
the timing logic control module comprises a plurality of timing circuits, and when the increase rate of the illuminance signal or the illuminance amplitude reaches a threshold value, the timing circuits are respectively triggered to generate a timing control function, and the enabling end of the high-voltage module is closed;
the high-voltage module is connected with the PLZT lens, and when the enable end of the high-voltage module is opened and the voltage is regulated for giving, constant-value high voltage is generated and acts on the PLZT lens to enable the PLZT lens to be in a light transmission state;
the voltage adjusting module is connected with the signal processing module and the high-voltage module and adjusts the output voltage of the high-voltage module along with the illuminance intensity so as to adjust the light transmittance of the PLZT;
and the discharging module is connected with the high-voltage module, and when the enabling end of the high-voltage module is closed, the voltage at the two ends of the PLZT lens is rapidly discharged and reduced to 0, so that the PLZT lens is in a light-tight state.
In the device of the invention, the signal processing module comprises a voltage following circuit, and a differential circuit and a signal conditioning circuit which are respectively connected with the voltage following circuit.
In the device, the timing logic control comprises a first timing circuit, a second timing circuit and a third timing circuit, the first timing circuit is connected with the third timing circuit, the first timing circuit and the second timing circuit are both connected with an enabling end of the high-voltage module, the first timing circuit and the second timing circuit are also connected with a triggering end of the discharge circuit, the third timing circuit is connected with the first timing circuit and the voltage adjusting module, the third timing circuit is triggered after the timing of the first timing circuit is finished, and the voltage adjusting circuit is triggered after the timing of the third timing circuit is finished; when the first timing circuit and the second timing circuit are triggered, the enable signal is output to the high-voltage module and the discharge signal is output to the discharge circuit.
In the device, the voltage adjusting module is connected with the signal conditioning circuit, the third timing circuit and the voltage giving end of the high-voltage module.
In the device, the first timing circuit, the second timing circuit and the third timing circuit are all 555 timing circuits.
In the device of the invention, the timing time of the first timing circuit and the second timing circuit is 1-2 seconds, and the timing time of the third timing circuit is 25-35 seconds.
The invention has the following beneficial effects: under the condition of daily illumination, the high voltage is generated to act on the PLZT lens, so that the PLZT lens is in a light-transmitting state. When the illumination increase rate exceeds a specified threshold value, the high-voltage module is triggered to discharge rapidly, and meanwhile, the high-voltage module is closed to enable the high-voltage module to not generate high voltage any more, so that the PLZT lens is in a light-tight state. And outputting given voltage within a certain time to enable the PLZT lens to generate transmittance in direct proportion to light intensity, thereby realizing dual redundancy triggering of the anti-flash photoelectric control device. The invention can effectively improve the system response speed by detecting the illumination pulse signal, and simultaneously adopts redundant illumination triggering to effectively improve the system safety.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural diagram of a photo protection control device using illuminance threshold and illuminance increase rate detection according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a photo protection control device using illuminance threshold and illuminance increase rate detection according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
With the more and more important role played by military laser weapons in modern war, the more and more attention is paid to laser protection. The device can be widely applied to laser protective glasses and nuclear flash protective glasses, is used for individual protection of pilots of fighters and bombers, can also be applied to individual protection of ground fighters, and has good application prospect. In the civil field, the optical density controller can also be applied to the occasions of electrically controlling the optical density, such as variable optical density filters, shutters, optical gate arrays and the like.
As shown in fig. 1, the photo-protection control device using illuminance threshold and illuminance increase rate detection according to the embodiment of the present invention includes:
the illuminance sensor 10 is used for collecting an illuminance signal and converting the illuminance signal into an illuminance voltage signal;
the signal processing module 20 adopts one path of signal and two paths of processing, the first path converts the increase rate of the illuminance signal into a pulse signal through the differentiating circuit 22 according to the illuminance voltage signal, the second path adjusts the amplitude of the illuminance signal through the signal conditioning circuit 23, and the two paths of processed signals are respectively connected to the timing logic control module 30;
the timing logic control module 30 includes a plurality of timing circuits, and when the increase rate of the illuminance signal or the illuminance amplitude reaches a threshold, the timing circuits are triggered to generate a timing control function, and the enable end of the high-voltage module is closed;
the high voltage module 50 is connected with the PLZT lens 70, and when the enable end of the high voltage module is opened and the voltage is adjusted for a given time, a constant value high voltage (such as 1000V) is generated and acts on the PLZT lens 70 to enable the PLZT lens to be in a light transmission state;
the voltage adjusting module 40 realizes the given voltage adjusting function of the high-voltage module and adjusts the output voltage of the high-voltage module along with the illuminance intensity, so that the light transmittance of the PLZT lens 70 is adjusted;
and the discharging module 60 is connected with the high-voltage module 50, and when the enabling end of the high-voltage module 50 is closed, the voltage at the two ends of the PLZT lens 70 is rapidly discharged and reduced to 0, so that the PLZT lens 70 is in a light-tight state. The discharging module 60 may be composed of a high voltage MOS transistor, and when the illuminance signal or the illuminance increase rate signal triggers the timing circuit, the high voltage MOS transistor is turned on to rapidly discharge the voltage across the PLZT lens 70 and reduce the voltage to 0, so that the PLZT lens 70 is in the opaque state.
As shown in fig. 2, in one embodiment of the present invention, the signal processing module 20 includes a voltage follower circuit 21, a differentiation circuit 22, and a signal conditioning circuit 23. The voltage follower circuit 21 is connected to the differential circuit 22 and the signal conditioning circuit 23, respectively.
Preferably, the timing logic control 30 includes a first timing circuit 31, a second timing circuit 32, and a third timing circuit 33. The first timing circuit 31 is connected to a third timing circuit 33. The first timing circuit 31 and the second timing circuit 32 are connected to the enable terminal of the high voltage module 50. The first timing circuit 31 and the second timing circuit 32 are also connected to the trigger terminal of the discharge circuit 60.
Preferably, the voltage adjusting module 40 is connected to the voltage-supplying terminals of the signal adjusting circuit 23, the third timing circuit 33, and the high-voltage module 50.
Preferably, the first timing circuit 31, the second timing circuit 32 and the third timing circuit 33 can all adopt 555 timing circuits. The timing time of the first timing circuit 31 and the second timing circuit 32 may be 1-2 seconds; the timing time of the third timing circuit 33 may be 25-35 seconds.
In one embodiment of the present invention, the high voltage module 50 generates a high voltage of 1000V under the daily illuminance condition, and the high voltage acts on the PLZT lens 70 to make the PLZT lens 70 in a transparent state. When a pulse signal generated by illuminance increase rate conversion exceeds a specified threshold value flash pulse or an illuminance amplitude exceeds a specified threshold value, the illuminance sensor 10 generates a corresponding slope voltage, the slope voltage is adjusted to a corresponding level signal through the differentiating circuit 22, the signal triggers the first timing circuit 31 to generate a 1-2S timing high level signal, the signal triggers the discharging circuit 60 to rapidly discharge the high voltage, the enabling end of the high voltage module 50 is closed, so that the high voltage module 50 does not generate 1000V high voltage any more, at the time, the PLZT lens 60 is in a non-light-tight state, after 1-2S timing, the third timing circuit 33 is triggered to generate timing of 25-35 seconds (such as 30S), the voltage adjusting circuit generates a voltage which changes in proportion with the illuminance within the timing time, the high voltage module 40 outputs an adjusting output voltage along with the signal adjusting circuit 23 under the level, so that the PLZT lens 70 generates a transmittance in proportion to the light intensity (i.e., the illuminance intensity is in a positive proportion relation with the PLZT transmittance). When the illuminance exceeds a specified threshold value, the signal conditioning circuit 23 generates a high level signal to trigger the discharge circuit 60 to perform 1000V high voltage discharge, and simultaneously the high voltage module 50 is closed to enable, and the PLZT lens 70 is in a light-tight state, so that dual redundancy triggering of the anti-flash photoelectric control device is realized.
According to the scheme, the system response rate can be effectively improved by detecting the light illumination pulse signals, and meanwhile, the system safety is effectively improved by adopting redundant light illumination triggering.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (6)
1. A light protection control device using illuminance threshold and illuminance increase rate detection, comprising:
the illuminance sensor is used for collecting an illuminance signal and converting the illuminance signal into an illuminance voltage signal;
the signal processing module adopts one path of signal and two paths of signal processing, the first path converts the growth rate of the illuminance signal into a pulse signal according to the illuminance voltage signal, the second path adjusts the amplitude of the illuminance voltage signal, and the two paths of processed signals are respectively connected to the timing logic control module;
the timing logic control module comprises a plurality of timing circuits, and when the increase rate of the illuminance signal or the illuminance amplitude reaches a threshold value, the timing circuits are respectively triggered to generate a timing control function, and the enabling end of the high-voltage module is closed;
the high-voltage module is connected with the PLZT lens, and when the enabling end of the high-voltage module is opened and the voltage is adjusted for giving, constant-value high voltage is generated and acts on the PLZT lens to enable the PLZT lens to be in a light transmission state;
the voltage adjusting module is connected with the signal processing module and the high-voltage module and adjusts the output voltage of the high-voltage module along with the illuminance intensity so as to adjust the light transmittance of the PLZT;
and the discharging module is connected with the high-voltage module, and when the enabling end of the high-voltage module is closed, the voltage at the two ends of the PLZT lens is rapidly discharged and reduced to 0, so that the PLZT lens is in a light-tight state.
2. The apparatus of claim 1, wherein the signal processing module comprises a voltage follower circuit, and a differentiation circuit and a signal conditioning circuit respectively connected to the voltage follower circuit.
3. The device of claim 1, wherein the timing logic control module comprises a first timing circuit, a second timing circuit and a third timing circuit, the first timing circuit is connected to the third timing circuit, the first timing circuit and the second timing circuit are both connected to the enable terminal of the high voltage module, the first timing circuit and the second timing circuit are also connected to the trigger terminal of the discharge circuit, the third timing circuit is connected to the first timing circuit and the voltage adjustment module, the third timing circuit triggers the third timing circuit after the timing of the first timing circuit is completed, and the third timing circuit triggers the voltage adjustment circuit after the timing of the third timing circuit is completed; when the first timing circuit and the second timing circuit are triggered, the enable signal is output to the high-voltage module and the discharge signal is output to the discharge circuit.
4. The apparatus of claim 2, wherein the voltage regulation module is connected to the signal conditioning circuit, the third timing circuit, and the voltage-providing terminal of the high-voltage module.
5. The apparatus of claim 3, wherein the first timing circuit, the second timing circuit, and the third timing circuit are 555 timing circuits.
6. The apparatus of claim 3, wherein the timing time of the first and second timing circuits is 1-2 seconds and the timing time of the third timing circuit is 25-35 seconds.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610762046.6A CN106125545B (en) | 2016-08-29 | 2016-08-29 | Light protection control device adopting illuminance threshold and illuminance increase rate detection |
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| CN201610762046.6A CN106125545B (en) | 2016-08-29 | 2016-08-29 | Light protection control device adopting illuminance threshold and illuminance increase rate detection |
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| CN106125545B true CN106125545B (en) | 2023-02-24 |
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| CN110597152B (en) * | 2019-10-21 | 2024-04-30 | 航宇救生装备有限公司 | Strong-flash-preventing lens switch state self-adaptive control circuit based on microcontroller |
| CN119310751A (en) * | 2024-12-16 | 2025-01-14 | 江苏精通技术服务有限公司 | System and method for adaptive control of smart glasses combined with the Internet of Things |
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