Ultraviolet-visible linear polarized light detection device and method

Abstract

The present invention discloses a device and method for detecting linearly polarized ultraviolet and visible light. The device comprises a flexible substrate on the upper surface of a turntable, with negative and positive plates fixed to the substrate. A photoelectric detection module comprises a connecting wire made of zinc oxide nanowires and a sleeve made of cadmium sulfide nanowires. The connecting wire is connected to the negative and positive plates, and the sleeve is fixedly wrapped around the outer wall of the connecting wire, with both ends spaced apart from the negative and positive plates. The sleeve is fixed to the upper surface of the flexible substrate. The negative plate is connected to a signal amplifier, which is connected to a mode converter, which is connected to a screen display, which is connected to the positive plate. During detection, the flexible substrate bends, driving the photoelectric detection module into a bent state. A stepper motor drives the turntable to rotate, and the zinc oxide nanowires and cadmium sulfide nanowires convert continuous ultraviolet and visible light signals into continuous electrical signals. These signals are amplified by the negative plate, then converted by the mode converter and displayed on the screen display. The result is used to determine whether the detected light is linearly polarized light.

Description

Technical Field

[0001] The present invention belongs to the field of dual-band photoelectric technology detection, and specifically relates to an ultraviolet-visible linear polarized light detection device and method. Background Art

[0002] Light, as an important information carrier, plays an indispensable role in our daily lives, and polarized light is also widely present. In recent decades, people's requirements for detecting light have gradually increased, and people are no longer satisfied with simply detecting natural light.

[0003] Traditional light detection is three-dimensional radiation detection related to spatial distribution, intensity, and spectrum, while the detection of polarized light is a seven-dimensional radiation detection process that can expand the amount of information to include polarization degree, polarization angle, and polarization ellipticity, improving the precision and accuracy of detection and having important potential applications.

[0004] Ultraviolet polarized light detection has broad application prospects in communications, remote sensing, near-field imaging, and military surveillance, such as missile early warning and intercept detection. Visible linearly polarized light can be used in environmental monitoring and soil assessment, and can detect hidden and camouflaged man-made targets. Current linearly polarized light detection is simple, single-band detection, which is irrelevant to the complex linear polarization detection requirements. This allows for simultaneous detection of both ultraviolet and visible linearly polarized light. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention provides an ultraviolet-visible linearly polarized light detection device and method, which enables users to quickly monitor whether the ultraviolet light and visible light in the current environment are linearly polarized light, and has good application prospects in the field of ultraviolet-visible linearly polarized light detection.

[0006] The present invention is achieved through the following technical solutions:

[0007] An ultraviolet-visible linear polarized light detection device comprises a stepping motor, a flexible substrate, a photoelectric detection module, a signal amplifier and a mode converter;

[0008] The flexible substrate is placed on the upper surface of the horizontal turntable, the output end of the stepper motor is fixed to the bottom of the turntable, the upper surface of the flexible substrate is fixed with a negative plate and a positive plate, the photoelectric detection module includes a connecting wire made of zinc oxide nanowires and a sleeve made of cadmium sulfide nanowires, the two ends of the connecting wire are respectively connected to the negative plate and the positive plate, the sleeve is fixedly wrapped on the outer wall of the connecting wire, the two ends of the sleeve are spaced from the negative plate and the positive plate, the connecting wire and the sleeve are in a natural state, and the sleeve is fixed to the upper surface of the flexible substrate;

[0009] The negative plate is connected to the input end of the signal amplifier, the output end of the signal amplifier is connected to the input end of the mode converter, the output end of the mode converter is connected to the input end of the screen display, and the output end of the screen display is connected to the positive plate.

[0010] Preferably, the flexible substrate is a PET substrate.

[0011] Preferably, the negative electrode plate and the positive electrode plate are both silver electrode plates.

[0012] Preferably, the flexible substrate is rectangular in shape, the negative electrode plate and the positive electrode plate are spaced apart in a width direction parallel to the flexible substrate, and both ends of the connecting line are perpendicular to the length directions of the negative electrode plate and the positive electrode plate respectively.

[0013] Furthermore, one of the connecting wires and the corresponding sleeve constitutes a detection unit. There are 3 to 5 detection units in the photoelectric detection module, and both ends of each detection unit are connected to the negative plate and the positive plate respectively.

[0014] Preferably, the distances between the two ends of the sleeve and the negative electrode plate and the positive electrode plate are both 2 to 3 mm.

[0015] Preferably, the chip model of the signal amplifier is FQPF8N60C, the chip model of the mode converter is ADC3542, and the chip model of the screen display is MAX7219EWG+T.

[0016] Furthermore, the power supply units of the signal amplifier, mode converter and screen display are alkaline zinc-manganese dry batteries.

[0017] A method for detecting ultraviolet-visible linear polarized light, based on any one of the above-mentioned ultraviolet-visible linear polarized light detection devices, comprises the following steps:

[0018] The flexible substrate bends, causing the connecting wire and the sleeve to be in a bent state. At the same time, the stepping motor drives the turntable to rotate once every 5 degrees, 10 degrees, 15 degrees, 20 degrees or 30 degrees. The zinc oxide nanowires and the cadmium sulfide nanowires produce a continuous piezoelectric effect. The zinc oxide nanowires and the cadmium sulfide nanowires respectively convert the detected continuous ultraviolet light signals and continuous visible light signals into continuous electrical signals. The continuous electrical signals are amplified by the signal amplifier through the negative plate and then converted by the mode converter. Finally, they are displayed on the screen. The displayed results are used to determine whether the detected light is linearly polarized light.

[0019] Furthermore, the turntable is circular, and starting from any point on the outer extension of the turntable, the stepping motor drives the turntable to rotate 180 degrees counterclockwise or clockwise.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] The present invention provides a UV-visible linear polarized light detection device. A photodetection module, a negative electrode plate, and a positive electrode plate are all bonded and fixed to a flexible substrate. The PET substrate, when bent, generates a self-powered effect due to its inherent properties, saving costs and allowing for reuse in various working environments. The negative and positive electrodes are connected to the photodetection module. After bending, the zinc oxide nanowires and cadmium sulfide nanowires in the photodetection module can sense and collect real-time UV and visible radiation signals from the current environment and convert them into corresponding electrical signals. Because the collected electrical signals are relatively weak, they need to be transmitted to a signal amplifier to amplify the UV and visible radiation signals. A mode converter then converts the amplified UV and visible radiation signals into digital signals that can be received by a screen display. Finally, the digital signals are transmitted to the screen display, where they are displayed as electrical current. Zinc oxide nanowires, as third-generation direct-bandgap wide-bandgap semiconductors, are more abundant, non-toxic, and environmentally friendly compared to current first- and second-generation semiconductors. Compared with other narrow-bandgap semiconductors, cadmium sulfide nanowires have good light absorption properties, excellent electrical transmission capabilities, outstanding physical and chemical stability, relatively low-cost synthesis methods, and a band width that matches visible light well, making them an excellent material for detecting visible light.

[0022] Furthermore, PET is polyethylene terephthalate, which is formed by the condensation of terephthalic acid and ethylene glycol. Compared with other substrates, the PET substrate has good mechanical properties, is easy to bend, has good heat resistance and aging resistance, and still has a certain toughness at -30°C. It is non-toxic, odorless, and has good hygiene and safety.

[0023] Furthermore, compared with ordinary zinc-manganese dry batteries, alkaline zinc-manganese dry batteries can provide a more stable operating voltage and a longer operating time than ordinary zinc-manganese batteries.

[0024] The present invention discloses a method for detecting ultraviolet-visible linearly polarized light. A flexible substrate bends, driving a connecting wire and a sleeve to bend. Simultaneously, a stepper motor drives a turntable to rotate every 5, 10, 15, 20, or 30 degrees. Zinc oxide nanowires and cadmium sulfide nanowires generate a continuous piezoelectric effect, converting the detected continuous ultraviolet light signals and continuous visible light signals into continuous electrical signals. The continuous electrical signals are amplified by a negative plate, a signal amplifier, and then converted by a mode converter. Finally, the signals are displayed on a screen. The displayed results allow a user to quickly monitor whether the ultraviolet and visible light in the current environment are linearly polarized. The method has promising application prospects in the field of ultraviolet-visible linearly polarized light detection. The present invention is inexpensive, durable, and heat-resistant, capable of real-time monitoring. Users can determine whether to go out and the corresponding time based on whether the light is linearly polarized, allowing them to take appropriate preventive measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the overall block diagram of the ultraviolet-visible linear polarized light detection device of the present invention.

[0026] Figure 2 for Figure 1 Schematic diagram of the structure of the photoelectric detection module when the PET substrate is in a bent state.

[0027] Among them: 1-turntable; 2-PET substrate; 3-positive electrode; 4-photoelectric detection module; 5-negative electrode; 6-signal amplifier; 7-mode converter; 8-screen display. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The present invention provides an ultraviolet-visible linear polarized light detection device, such as Figure 1As shown, it includes a photoelectric detection module 4, a signal processing module (i.e., a signal amplifier 6 and a mode converter 7), a display module (i.e., a screen display 8), a circular turntable 1, a PET substrate 2, and two silver electrode plates (i.e., a positive electrode 3 and a negative electrode 5). The PET substrate 2 is placed on the upper surface of the turntable 1, the output end of the stepper motor is fixed to the bottom of the turntable 1, and the turntable 1 is located in a horizontal direction. The negative electrode 5 and the positive electrode 3 are fixed to the upper surface of the PET substrate 2. The photoelectric detection module 4 includes a connecting wire made of zinc oxide nanowires and a sleeve made of cadmium sulfide nanowires. The two ends of the connecting wire are respectively connected to the negative electrode 5 and the positive electrode 3. The sleeve is fixedly wrapped around the outer wall of the connecting wire. The two ends of the sleeve are separated from the negative electrode 5 and the positive electrode 3 by 2 to 3 mm. The connecting wire and the sleeve are both in a natural state, and the sleeve is fixed to the upper surface of the PET substrate 2.

[0030] Specifically, the PET substrate 2 is rectangular in shape, with the negative electrode 5 and positive electrode 3 fixed to the left and right ends of the PET substrate 2. The negative electrode 5 and positive electrode 3 are spaced apart along the width of the PET substrate 2, and the ends of the connecting wire are perpendicular to the length of the negative electrode 5 and positive electrode 3, respectively. A connecting wire and its corresponding sleeve constitute a detection unit. The photoelectric detection module 4 has 3 to 5 detection units, and each detection unit has two ends connected to the negative electrode 5 and positive electrode 3, respectively. The PET substrate 2 is made of polyethylene terephthalate.

[0031] The two silver electrode plates are connected to the photoelectric detection module 4, the negative electrode 5 is connected to the input port of the signal amplifier 6, the output port of the signal amplifier 6 is connected to the input port of the mode converter 7, the output port of the mode converter 7 is connected to the input port of the screen display 8, and the output port of the screen display 8 is connected to the positive electrode 3. The signal amplifier 6 and the screen display 7 are on the outside of the turntable 1.

[0032] Therefore, the photoelectric detection module 4 is zinc oxide nanowires and cadmium sulfide nanowires. The zinc oxide nanowires can detect ultraviolet light, and the cadmium sulfide nanowires can detect visible light. The two ends of the zinc oxide nanowires are connected to the two silver electrode plates in an orderly manner. The zinc oxide nanowires can be on the upper surface of the positive electrode 3 and the negative electrode 5.

[0033] like Figure 2As shown, when the PET substrate 2 is bent, the orderly arranged zinc oxide nanowires and cadmium sulfide nanowires thereon produce a piezoelectric effect, thereby converting the detected optical signal into an electrical signal without the need for external power supply and transmitting it to the two silver electrode plates. Therefore, through the PET substrate 2, the zinc oxide nanowires and cadmium sulfide nanowires in the photoelectric detection module 4, after being bent, can sense and collect the real-time ultraviolet radiation signal and visible light radiation signal of the current environment. After collecting the ultraviolet radiation signal and visible light radiation signal, since the previously collected ultraviolet radiation signal and visible light radiation signal are relatively weak, the ultraviolet radiation signal and visible light radiation signal are transmitted to the signal amplifier 6 to amplify the ultraviolet radiation signal and visible light radiation signal. The amplified ultraviolet radiation signal and visible light radiation signal are then converted into digital signals that can be received by the screen display 8 through the mode converter 7. Finally, the digital signals are transmitted to the screen display 8 and displayed by the screen display 8 in the form of current.

[0034] Starting from any point on the outer extension of turntable 1, a stepper motor controls the turntable's counterclockwise or clockwise rotation from 0 to 180 degrees, at intervals of 5, 10, 15, 20, or 30 degrees. Because the signal characteristics from 180 to 360 degrees are symmetrical, the results within the 0-180 degree rotation range can be used to determine whether the light is linearly polarized. If a peak light response is observed at a certain angle and zero light response in the perpendicular direction, the detected light is linearly polarized.

[0035] The chip model of the signal amplifier 6 is FQPF8N60C, the chip model of the mode converter 7 is ADC3542, the chip model of the screen display 8 is MAX7219EWG+T, and the power supply unit is a dry battery, which is an alkaline zinc-manganese dry battery and can power the signal processing module and the display module.

[0036] The present invention provides a method for detecting ultraviolet-visible linear polarized light, and the specific operating steps are as follows:

[0037] First, the photoelectric detection module 4 and two silver electrode plates are fixed to the PET substrate 2. The PET substrate 2 bends, causing the connecting wires and sleeve to bend. Simultaneously, a stepper motor drives the turntable 1 to rotate every 5, 10, 15, 20, or 30 degrees. The zinc oxide nanowires and cadmium sulfide nanowires can generate a continuous piezoelectric effect, generating a current signal under illumination. The zinc oxide nanowires and cadmium sulfide nanowires in the photoelectric detection module 4 can respectively sense and collect the continuous ultraviolet and visible light signals in the current environment, and transmit the ultraviolet and visible light signals to the signal amplifier 6. Because the detected signals are too weak, the signal amplifier 6 amplifies the detected ultraviolet and visible light signals. The amplified ultraviolet and visible light signals are then transmitted to the mode converter 7, which converts them into digital signals. Finally, the screen display 8 receives the digital signals and displays them in the form of current. The displayed results determine whether the detected light is linearly polarized light.

Claims

1. A UV-visible linear polarized light detection device, characterized in that: It includes a stepping motor, a flexible substrate, a photoelectric detection module (4), a signal amplifier (6) and a mode converter (7); The flexible substrate is placed on the upper surface of a horizontal turntable (1), the output end of the stepper motor is fixed to the bottom of the turntable (1), the upper surface of the flexible substrate is fixed with a negative electrode plate and a positive electrode plate, the photoelectric detection module (4) includes a connecting wire made of zinc oxide nanowires and a sleeve made of cadmium sulfide nanowires, the two ends of the connecting wire are respectively connected to the negative electrode plate and the positive electrode plate, the sleeve is fixedly wrapped on the outer wall of the connecting wire, the two ends of the sleeve are spaced from the negative electrode plate and the positive electrode plate, the connecting wire and the sleeve are in a natural state, and the sleeve is fixed to the upper surface of the flexible substrate; The negative electrode plate is connected to the input end of the signal amplifier (6), the output end of the signal amplifier (6) is connected to the input end of the mode converter (7), the output end of the mode converter (7) is connected to the input end of the screen display (8), and the output end of the screen display (8) is connected to the positive electrode plate.

2. The ultraviolet-visible linear polarized light detection device according to claim 1, characterized in that: The flexible substrate is a PET substrate.

3. The ultraviolet-visible linear polarized light detection device according to claim 1, characterized in that: The negative electrode plate and the positive electrode plate are both silver electrode plates.

4. The ultraviolet-visible linear polarized light detection device according to claim 1, characterized in that: The flexible substrate is rectangular in shape, the negative electrode plate and the positive electrode plate are spaced apart in a width direction parallel to the flexible substrate, and both ends of the connecting line are perpendicular to the length directions of the negative electrode plate and the positive electrode plate respectively.

5. The ultraviolet-visible linear polarized light detection device according to claim 4, characterized in that: One of the connecting wires and the corresponding sleeve forms a detection unit. There are 3 to 5 detection units in the photoelectric detection module (4). Both ends of each detection unit are connected to the negative electrode plate and the positive electrode plate respectively.

6. The ultraviolet-visible linear polarized light detection device according to claim 1, characterized in that: The distances between the two ends of the sleeve and the negative electrode plate and the positive electrode plate are both 2 to 3 mm.

7. The ultraviolet-visible linear polarized light detection device according to claim 1, characterized in that: The chip model of the signal amplifier (6) is FQPF8N60C, the chip model of the mode converter (7) is ADC3542, and the chip model of the screen display (8) is MAX7219EWG+T.

8. The ultraviolet-visible linear polarized light detection device according to claim 7, characterized in that: The power supply units of the signal amplifier (6), the mode converter (7) and the screen display (8) are alkaline zinc-manganese dry batteries.

9. A method for detecting ultraviolet-visible linear polarized light, characterized in that: An ultraviolet-visible linear polarized light detection device according to any one of claims 1 to 8, comprising the following steps: The flexible substrate bends, driving the connecting wire and the sleeve to be in a bent state. At the same time, the stepping motor drives the turntable (1) to rotate once every 5 degrees, 10 degrees, 15 degrees, 20 degrees or 30 degrees. The zinc oxide nanowires and the cadmium sulfide nanowires generate a continuous piezoelectric effect. The zinc oxide nanowires and the cadmium sulfide nanowires convert the detected continuous ultraviolet light signal and the continuous visible light signal into continuous electrical signals respectively. The continuous electrical signals are amplified by the negative plate through the signal amplifier (6) and then converted by the mode converter (7). Finally, the signals are displayed on the screen display (8). The displayed results are used to determine whether the detected light is linearly polarized light.

10. The method for detecting ultraviolet-visible linear polarized light according to claim 9, wherein: The turntable (1) is circular, and a stepping motor drives the turntable (1) to rotate 180 degrees counterclockwise or clockwise, starting from any point on the outer extension of the turntable (1).

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