Alternating resistor based on long afterglow material

Abstract

The invention discloses an alternating resistor based on a long afterglow material, and relates to the technical field of alternating resistors. The alternating resistor comprises a photoresistor, an LED lamp bead, a fixed resistor, a long afterglow phosphor and a shading tube cap, the photoresistor is provided with a first pin and a second pin which are external interfaces of the photoresistor, and the first pin and the second pin are respectively connected with two electrodes of the photoresistor; the LED lamp bead and the fixed resistor are connected in series through a wire and are arranged on one side of the photoresistor, and the fixed resistor is connected with the positive electrode of the LED lamp bead; the long-afterglow fluorophor covers the light-emitting surface of the LED lamp bead; the shading tube cap is arranged on the photoresistor, the LED lamp bead, the fixed resistor and the long afterglow phosphor in a covering mode and avoids the tube pins. The all-solid-state alternating resistor is designed by utilizing the unique afterglow attenuation characteristic of the long afterglow material and matching with the characteristic that the resistance value of the photoresistor changes under the changing illumination condition, so that the resistance value of the alternating resistor can be changed under the condition of no moving component, and the system stability and the service life are superior to those of the existing scheme.

Description

Technical Field

[0001] The invention relates to the technical field of alternating resistors, and in particular to an alternating resistor based on a long afterglow material. Background Art

[0002] In electronics, alternating voltage or current signals are very common signals. Inductors and capacitors are often used to produce such alternating signals, and the circuits are usually more complicated. If there is a simple and reliable alternating resistor whose resistance value alternates in a certain pattern, it will be of great significance for the generation of alternating electrical signals.

[0003] At present, most of the relevant records about variable resistors are mechanical, large in size and high in cost. For example, a solid variable resistor disclosed in the Chinese utility model patent with publication number CN204558172U changes the resistance value manually, with low frequency, poor periodicity and no continuity; a motor-driven sliding variable resistor disclosed in the Chinese invention patent with publication number CN104979060A changes the resistance value by driving the slider with a motor, but the resistor substrate used in the patent is linear. If you want to obtain an output of alternating resistance, you need to drive the motor to move back and forth, which means that the motor can only run back and forth at a very low frequency, otherwise the motor will have a large inertia force and be easily damaged.

[0004] The Chinese invention patent with publication number CN106328328B and the Chinese invention patent with publication number CN109300639B have improved the motor transmission method, thereby improving the performance of the variable resistor and even being able to generate sinusoidal alternating resistance. However, they are still variable resistors based on mechanical movement and have no essential difference compared to other variable resistors.

[0005] Therefore, in view of the above problems, it is necessary to propose an alternating resistor that does not rely on mechanical components, which is of great significance to the development of electronic technology. Summary of the invention

[0006] In order to solve the above problems, the present invention discloses an alternating resistor based on a long afterglow material, which relies on the long afterglow luminescence characteristic of the long afterglow material that slowly decays after light excitation, so that the photoresistor changes under the irradiation of the long afterglow luminescence, and the afterglow brightness of the long afterglow material changes periodically by periodically controlling the turning on and off of the LED lamp beads, so that the resistance value of the photoresistor presents periodic alternation.

[0007] According to the purpose of the present invention, an alternating resistor based on a long afterglow material is proposed, comprising a photoresistor, an LED lamp bead, a fixed resistor, a long afterglow phosphor and a light-shielding cap; the photoresistor is provided with a first pin and a second pin, which are external interfaces of the photoresistor, and the first pin and the second pin are respectively connected to the two poles of the photoresistor; the LED lamp bead and the fixed resistor are connected in series through a wire and are arranged on one side of the photoresistor, and the fixed resistor is connected to the positive pole of the LED lamp bead; the long afterglow phosphor covers the light-emitting surface of the LED lamp bead; the light-shielding cap is arranged on the photoresistor, the LED lamp bead, the fixed resistor and the long afterglow phosphor, avoiding the pin cover.

[0008] Preferably, both ends of the wire connecting the LED lamp bead and the fixed resistor in series pass through the photoresistor and are respectively connected to the third pin and the fourth pin at the ends, and the third pin and the fourth pin are insulated from the two poles of the photoresistor.

[0009] Preferably, the luminous color of the LED lamp bead is any color in the range of ultraviolet to blue light, and its luminous spectrum intersects with the absorption spectrum of the long afterglow phosphor.

[0010] Preferably, the long afterglow phosphor is SrAl2O4:Eu,Dy phosphor, which is mixed into silica gel and coated on the light-emitting surface of the LED lamp bead. The light-emitting color of the long afterglow phosphor is yellow-green.

[0011] Preferably, the fixed resistor is a color ring resistor, and its resistance is between 1KΩ-5MΩ.

[0012] Compared with the prior art, the advantages of the alternating resistor based on the long afterglow material disclosed in the present invention are:

[0013] 1. The present invention utilizes the unique afterglow attenuation characteristics of long afterglow materials and the characteristic of photoresistors that their resistance changes under changing light conditions to design a fully solid-state alternating resistor, so that its resistance can be alternating without moving components, and the system stability and life are better than existing solutions.

[0014] 2. The solution disclosed in the present invention has low cost and small device size, which is conducive to industrial promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0017] Figure 2 It is a graph showing the afterglow brightness of the long afterglow phosphor under intermittent excitation according to an embodiment of the present invention.

[0018] Figure 3 The figure is a curve diagram of the resistance change of the alternating resistor according to an embodiment of the present invention.

[0019] In the figure: 1-first pin; 2-second pin; 3-third pin; 4-fourth pin; 5-photoresistor; 6-wire; 7-LED lamp bead; 8-fixed resistor; 9-long afterglow phosphor; 10-light shielding cap. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is briefly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Figure 1-Figure 3 The preferred embodiments of the present invention are shown and analyzed in detail.

[0022] like Figure 1 An alternating resistor based on a long afterglow material is shown, comprising a photoresistor 5, an LED lamp bead 7, a fixed resistor 8, a long afterglow phosphor 9 and a light shielding tube cap 10.

[0023] The photoresistor 5 adopts GL5528 provided by Senba, and is provided with a first pin 1 and a second pin 2, which are external interfaces of the photoresistor 5, and the first pin 1 and the second pin 2 are respectively connected to the two poles of the photoresistor 5. The photoresistor 5 is also provided with a third pin 3 and a fourth pin 4, and the third pin 3 and the fourth pin 4 adopt copper wire with a diameter of 0.5 mm, and the third pin 3 and the fourth pin 4 penetrate the support frame of the photoresistor 5 and are fixed with glue, and the third pin 3 and the fourth pin 4 are connected to the LED lamp bead 7 through the wire 6 penetrating the photoresistor 5, and are insulated from the two poles of the photoresistor 5.

[0024] The fixed resistor 8 adopts a 150KΩ color ring resistor, which is connected in series with the third pin 3. The other end of the fixed resistor 8 is connected to the positive electrode of the LED lamp bead 7. The negative electrode of the LED lamp bead 7 is connected to the fourth pin 4 through a wire 6. The wire 6 adopts a 0.5mm copper wire. The LED lamp bead 7 adopts a 50mW LED lamp bead 7, and its luminous color is blue with a central wavelength of 450nm. Its luminous spectrum intersects with the absorption spectrum of the long afterglow phosphor 9.

[0025] The long afterglow phosphor 9 is made of commercially available SrAl2O4:Eu,Dy phosphor, which is mixed into silica gel and coated on the light-emitting surface of the LED lamp bead 7. The long afterglow phosphor 9 emits yellow-green light, with a central wavelength of 520nm and a half-width of 70nm.

[0026] The light-shielding tube cap 10 is made of stainless steel, with one end sealed and the other end open. The cap is buckled on the base of the photoresistor 5, and the LED lamp beads 7, the long afterglow phosphor 9, the fixed resistor 8, and the photosensitive mask of the photoresistor 5 are buckled to isolate them from external light.

[0027] Working principle: Figure 1 As shown, by controlling the third pin 3 and the fourth pin 4, the LED lamp bead 7 connected thereto can be turned on and off. After the LED lamp bead 7 is turned on, the long afterglow phosphor 9 is excited to emit light, and at this time the resistance value of the photoresistor 5 is at a low level. After the LED lamp bead 7 is turned off, the luminance of the long afterglow phosphor 9 begins to decrease, but due to its long afterglow characteristics, the brightness decrease lasts for a long time, so the resistance value of the photoresistor 5 under its irradiation also increases as the afterglow brightness of the long afterglow phosphor 9 decreases. By cyclically turning the LED lamp bead 7 on and off, the afterglow brightness of the long afterglow phosphor 9 changes periodically, as shown in FIG. Figure 2 As shown; the resistance of the photoresistor 5 also presents a periodic alternating state, such as Figure 3 By adjusting the types of the photoresistor 5 and the long afterglow phosphor 9 and the distance between the photoresistor 5 and the long afterglow phosphor 9, an alternating resistor with different resistance value change rules can be constructed.

[0028] By adopting the structure of the present invention, under the action of the electric trigger signal, the resistance value of the alternating resistor can be changed along with the trigger signal, and the structure is fully solid-state and has no moving components.

[0029] The above description of the disclosed embodiments enables those skilled in the art to implement and use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit and scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. An alternating resistor based on a long afterglow material, characterized in that: The invention comprises a photoresistor (5), an LED lamp bead (7), a fixed resistor (8), a long afterglow phosphor (9) and a light shielding cap (10); the photoresistor (5) is provided with a first pin (1) and a second pin (2) which are external interfaces of the photoresistor (5); the first pin (1) and the second pin (2) are respectively connected to the two poles of the photoresistor (5); the LED lamp bead (7) and the fixed resistor (8) are connected in series via a wire (6) and are arranged on one side of the photoresistor (5); the fixed resistor (8) is connected to the positive pole of the LED lamp bead (7); the long afterglow phosphor (9) covers the light-emitting surface of the LED lamp bead (7); and the light shielding cap (10) is arranged on the photoresistor (5), the LED lamp bead (7), the fixed resistor (8) and the long afterglow phosphor (9) avoiding the pin cover.

2. The alternating resistor based on long afterglow material according to claim 1, characterized in that: Both ends of the wire (6) connecting the LED lamp bead (7) and the fixed resistor (8) in series pass through the photoresistor (5) and are respectively connected to the third pin (3) and the fourth pin (4) at the ends. The third pin (3) and the fourth pin (4) are insulated from the two poles of the photoresistor (5).

3. The alternating resistor based on long afterglow material according to claim 1, characterized in that: The luminous color of the LED lamp bead (7) is any color within the range of ultraviolet to blue light, and its luminous spectrum intersects with the absorption spectrum of the long afterglow phosphor (9).

4. The alternating resistor based on long afterglow material according to claim 1, characterized in that: The long afterglow phosphor (9) is SrAl2O4:Eu,Dy phosphor powder, which is mixed into silica gel and coated on the light-emitting surface of the LED lamp bead (7). The light-emitting color of the long afterglow phosphor (9) is yellow-green.

5. The alternating resistor based on long afterglow material according to claim 1, characterized in that: The fixed resistor (8) is a color ring resistor, and its resistance is between 1KΩ-5MΩ.

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