A writing pen for detecting LED performance based on friction power supply

Abstract

The invention discloses a writing pen for detecting LED performance based on friction power supply, which is composed of a writing pen body, a friction nanogenerator and an LED detection circuit, wherein the friction nanogenerator and the LED detection circuit are both installed on the writing pen body, and the friction nanogenerator generates alternating current through the friction movement between a second friction plate and a first friction plate, and supplies power to the LED detection circuit for detecting LED performance; through the above-mentioned design, the LED detection circuit is integrated on the writing pen body, so that the previous writing pen has the function of LED detection on the basis of writing, and the power supply of the LED detection circuit comes from the friction nanogenerator installed on the pen shell, and the power supply can be operated as long as the friction plate in the friction nanogenerator moves, without relying on an external power supply; the writing pen has the advantages of small size, simple structure, reasonable design, easy to carry, convenient use, etc.

Description

Technical Field

[0001] The invention discloses a technical field related to electronic detection, and in particular to a writing pen for detecting LED performance based on friction power supply. Background Art

[0002] When doing electronic design welding samples and electronic maintenance, it is often necessary to test the quality of light-emitting diodes, determine the color, and distinguish between positive and negative pins. In the past, a multimeter was required for testing when performing the above work. However, due to the large size of the multimeter, it needs to be carried in a special tool box. Therefore, in actual work, it is often forgotten to bring the multimeter, resulting in the inability to conduct various performance tests of the light-emitting diodes in time, affecting the progress of work. Moreover, when the multimeter is working, it needs to be powered by a battery. In actual work, it is often the case that the multimeter battery is out of power, resulting in the multimeter being unable to be used normally and the inability to conduct performance tests of the light-emitting diodes in time, affecting the progress of work.

[0003] In addition, when a multimeter is currently used to test the performance of light-emitting diodes, the performance of only one light-emitting diode can be tested at a time, and the light emission consistency of multiple light-emitting diodes cannot be tested at the same time, and the function is limited.

[0004] Therefore, whether it is possible to develop a portable light emitting diode performance testing tool has become an urgent problem to be solved. Summary of the invention

[0005] In view of this, the present invention provides a writing pen for detecting LED performance based on friction power supply, so as to solve the problems of large size, inconvenient to carry, frequent battery failure and affecting detection work of previous detection multimeters.

[0006] The technical solution provided by the present invention is specifically: a writing pen for detecting LED performance based on friction power supply, the writing pen comprising: a writing pen body, a friction nanogenerator and an LED detection circuit;

[0007] The writing pen body comprises: a pen core and a pen shell, wherein the pen shell is sleeved on the outside of the pen core, and a concave area is arranged in the middle of the pen shell along the circumferential direction;

[0008] The friction nanogenerator comprises: a first friction plate and a second friction plate;

[0009] The first friction plate is cylindrical and made of polytetrafluoroethylene. Two copper foils are arranged at intervals along the height direction on the inner side surface of the first friction plate, and an electrode line is led out of each copper foil. The first friction plate is fixedly sleeved on the outside of the recessed area of ​​the pen housing.

[0010] The second friction plate is cylindrical and made of polyethylene terephthalate. The height of the second friction plate is smaller than that of the first friction plate. The second friction plate is tightly mounted on the outside of the first friction plate and can perform up and down friction movement relative to the first friction plate.

[0011] The LED detection circuit includes: a rectifier bridge, a current limiting resistor, a first dial switch, a filter capacitor, a second dial switch and a busbar;

[0012] The AC input end of the rectifier bridge is respectively connected to the two electrode wires in the friction nanogenerator, the first dial switch and the filter capacitor are connected in series to form a first branch, the second dial switch and the bus bar are connected in series to form a second branch, and the first branch and the second branch are connected in parallel and connected in series with the current limiting resistor between the negative and positive electrodes of the output end of the rectifier bridge.

[0013] Preferably, the two copper foils on the inner side of the first friction plate have the same width, and the interval width between the two copper foils is the same as the width of the copper foil.

[0014] More preferably, the thickness of the first friction plate is 0.05 mm-0.3 mm.

[0015] Further preferably, the height of the second friction plate is one third of the height of the first friction plate.

[0016] More preferably, the thickness of the second friction plate is 0.05 mm-0.3 mm.

[0017] Further preferably, the diameter of the second friction plate is less than or equal to the diameters of the upper and lower edges of the recessed area in the middle of the pen housing.

[0018] Further preferably, a 2P busbar is connected in parallel between the negative electrode and the positive electrode of the output end of the rectifier bridge for an external battery.

[0019] Further preferably, the rectifier bridge, current limiting resistor and filter capacitor are all located inside the pen housing, the two electrode wires in the first friction plate are connected to the AC input end of the rectifier bridge after passing through the side wall of the pen housing, and the first dip switch, the second dip switch and the female connector are all installed on the outside of the pen housing.

[0020] The writing pen for detecting LED performance based on friction power supply provided by the present invention is composed of a writing pen body, a friction nanogenerator and an LED detection circuit, wherein the writing pen body serves as a carrier of the friction nanogenerator and the LED detection circuit, and the friction nanogenerator and the LED detection circuit are both installed on the writing pen body, and the friction nanogenerator generates alternating current through the friction movement between the second friction plate and the first friction plate, and supplies power to the LED detection circuit for detecting LED performance; through the above-mentioned design, the LED detection circuit is integrated on the writing pen body, and the volume is greatly reduced compared with the previous multimeter, which is easy to carry, so that the previous writing pen has the function of LED detection on the basis of writing, and the power supply of the LED detection circuit comes from the friction nanogenerator installed on the pen shell, and the power supply of the LED detection circuit can be obtained as long as the friction plate in the friction nanogenerator moves, which effectively solves the problem that the previous multimeter relies on batteries and cannot work without batteries.

[0021] The writing pen for detecting LED performance based on friction power supply provided by the present invention has the advantages of simple structure, reasonable design, easy to carry, convenient to use, etc.

[0022] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the structure of a writing pen for detecting LED performance based on friction power supply provided in the embodiment disclosed in the present invention Figure 1 ;

[0026] Figure 2 A schematic diagram of the structure of the other side of a writing pen for detecting LED performance based on friction power supply provided by an embodiment of the present invention;

[0027] Figure 3 An expanded view of a first friction plate in a writing pen for detecting LED performance based on friction power supply provided by an embodiment of the present invention;

[0028] Figure 4A circuit diagram of an LED detection circuit in a writing pen based on friction power supply to detect LED performance provided in the disclosed embodiment of the present invention;

[0029] Figure 5 An LED detection circuit diagram corresponding to the simultaneous detection of 6 LED lamp beads in a writing pen based on friction power supply detection of LED performance provided by the disclosed embodiment of the present invention;

[0030] Figure 6 An embodiment of the present invention discloses an LED detection circuit diagram corresponding to detecting one LED lamp bead in a writing pen based on friction power supply to detect LED performance. DETAILED DESCRIPTION

[0031] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices consistent with some aspects of the present invention as detailed in the appended claims.

[0032] In order to solve the problems of the large size, inconvenience of carrying and frequent battery failure of the traditional multimeter, which affects the detection work, this implementation plan is based on the actual working situation, and uses the writing pen that the design and maintenance personnel often carry as a carrier to design a writing pen based on friction power supply to detect LED performance. Figure 1 , Figure 2 The writing pen is mainly composed of three parts: a writing pen body 1, a friction nanogenerator 2 and an LED detection circuit 3. Among them, the writing pen body 1 has the same structure as the writing pens currently on the market, and is also composed of a pen core 11 and a pen shell 12. Among them, the pen shell 12 is mounted on the outside of the pen core 11. Different from the existing writing pens, a recessed area is arranged in the middle of the pen shell 12 along the circumferential direction. The setting of the recessed area is mainly for the installation of the friction nanogenerator 2.

[0033] See also Figure 1 , Figure 2 The friction nanogenerator 2 is composed of a first friction plate 21 and a second friction plate 22. The first friction plate 21 is cylindrical and made of polytetrafluoroethylene. Two copper foils 211 are arranged at intervals along the height direction on the inner side of the first friction plate 21, and each copper foil 211 leads to an electrode line 212. The expansion diagram of the first friction plate 21 can be seen in Figure 3During installation, the first friction plate 21 is fixedly mounted on the outside of the recessed area of ​​the pen shell 12. The height of the first friction plate 21 is usually designed to be the same as the height of the recessed area of ​​the pen shell 12. The second friction plate 22 is also cylindrical and made of polyethylene terephthalate. The height of the second friction plate 22 is less than that of the first friction plate 21. The second friction plate 22 is tightly mounted on the outside of the first friction plate 21 and can perform up and down friction movement relative to the first friction plate 21. When the second friction plate 22 is tightly mounted on the first friction plate 21 and performs up and down friction movement, the friction nanogenerator 2 can generate alternating current, which is output by two electrode lines 212.

[0034] In actual design and use, the widths of the two copper foils 211 on the inner side of the first friction plate 21 are designed to be the same, and the spacing width between the two copper foils 211 is the same as the width of the copper foil 211. The width is defined as the width of the copper foil 211 and the spacing width along the height direction of the first friction plate 21. Such a design can not only effectively utilize space, but also, through the above-mentioned design, when the polyethylene terephthalate material that is easy to lose charge and the polytetrafluoroethylene material that is easy to obtain electrons slide and rub against each other, the induced charge amount is large during one friction back and forth, and the output efficiency is high. Among them, the height of the second friction plate 22 is one-third of the height of the first friction plate 21. In this way, while facilitating sliding, the copper foil of the second friction plate can be changed greatly relative to the first friction plate, thereby improving the current output efficiency. Because in actual tests, the faster the relative area of ​​the second friction plate and the copper foil on the back of the first friction plate changes, the higher the output voltage; wherein, the thickness of the first friction plate 21 and the thickness of the second friction plate 22 can be 0.05mm-0.3mm, but considering that too thin is easy to be broken by friction, too thick increases the volume of the pen and reduces the user experience, the preferred thickness is 0.1mm.

[0035] As an optimization of the technical solution, the diameter of the second friction plate 22 is less than or equal to the upper and lower edge diameters of the recessed area in the middle of the pen housing 12. By designing the above dimensions, the upper and lower friction movement of the second friction plate 22 relative to the first friction plate 21 can be limited.

[0036] See also Figure 4 The LED detection circuit 3 is mainly composed of a rectifier bridge D1, a current limiting resistor R1, a first dial switch K1, a filter capacitor C1, a second dial switch K2 and a bus bar H1, wherein the AC input end of the rectifier bridge D1 is respectively connected to the two electrode lines 212 in the friction nanogenerator 2, the first dial switch K1 and the filter capacitor C1 are connected in series to form a first branch, the second dial switch K2 and the bus bar H1 are connected in series to form a second branch, and the first branch and the second branch are connected in parallel and connected in series with the current limiting resistor R1 between the negative electrode and the positive electrode of the output end of the rectifier bridge D1.

[0037] When the LED detection circuit 3 is carried by the writing pen body 1, see Figure 1 , Figure 2 The rectifier bridge D1, the current limiting resistor R1 and the filter capacitor C1 are all arranged on the integrated circuit board and installed inside the pen shell 12. The two electrode wires 212 in the first friction plate 21 are connected to the AC input end of the rectifier bridge D1 after passing through the side wall of the pen shell 12 to power the rectifier bridge D1. The first dial switch K1, the second dial switch K2 and the mother row H1 are all installed outside the pen shell 12. In order to realize the simultaneous testing of the luminous consistency of multiple light-emitting diodes, the mother row H1 can use 2*6P mother row, and the mother row spacing is 2.54mm. At this time, the LED detection circuit 3 can simultaneously connect 6 LED lamp beads in series to detect the luminous consistency. The specific circuit principle is shown in Figure 5. Of course, the LED detection circuit 3 can also detect 1 LED lamp bead. During the test, the positive pole of the LED lamp bead is connected to pin 1 and the negative pole is connected to pin 2. The specific circuit principle is shown in Figure 5. Figure 6 .

[0038] The writing pen based on friction power supply to detect LED performance provided in the above implementation scheme has the following specific working principle: when the LED lamp bead is detected, the LED lamp bead is inserted into the mother row H1, wherein the code switch K1 is a selection switch for connecting and disconnecting the filter capacitor C1, and the code switch K2 is used to control the on and off of the LED detection circuit. When the code switch K1 is disconnected and the code switch K2 is connected, the circuit is not filtered, and the alternating current generated by the friction nanogenerator 2 is rectified by the rectifier bridge D1. A series of voltage peaks make the LED lamp bead flicker and light up easily. When the code switch K1 and the code switch K2 are both connected, the circuit is connected in parallel with the filter capacitor C1, so that the alternating current generated by the friction nanogenerator 2 must be charged to the filter capacitor C1 after being rectified by the rectifier bridge D1. When working, the second friction plate 22 in the friction nanogenerator 2 must be slid back and forth to generate electricity, so that the filter capacitor C1 is charged to nearly 3 volts or more, and the LED lamp bead begins to emit light stably. Usually, the DIP switch K2 is turned off to disconnect the LED lamp beads, and the friction nanogenerator 2 is first allowed to fully charge the filter capacitor C1, and then the DIP switch K2 is turned on to connect the LED lamp beads, so that the power of the filter capacitor C1 is instantly fed to the LED lamp beads for use. At this time, the LED lamp beads will emit dazzling light for a moment. In this way, the luminous effect of the LED lamp beads when they are working normally can be detected by relying solely on friction power generation. The current limiting resistor R1 in the circuit is used to adjust the output current to prevent the LED lamp beads from burning out.

[0039] In order to expand the functionality and improve the technical solution, see Figure 4 A 2P mother row CN2 can also be set in the LED detection circuit 3. The 2P mother row CN2 is connected in parallel between the negative electrode and the positive electrode of the output end of the rectifier bridge D1 for external battery connection. Figure 1The 2P female row CN2 is also installed on the outside of the pen housing 12.

[0040] At this time, connect a 3.7V lithium battery through the 2P mother row CN2 as an external unit input. In the case of an external battery, the writing pen becomes a traditional external power LED detection device. On the basis of the external battery, a high-power LED lamp bead can also be plugged into the mother row CN1, allowing the writing pen to be used as a temporary lighting tool.

[0041] The writing pen based on friction power supply to detect LED performance provided in the above implementation scheme, in addition to the above-mentioned writing, LED detection, lighting and other functions, can also be connected to the busbar CN1 at night to generate electricity by sliding the second friction plate up and down, so that the LED lamp beads on the busbar CN1 can glow, and it can be used as a friction-luminous toy with various functions at the same time.

[0042] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0043] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A writing pen for detecting LED performance based on friction power supply, characterized in that: include: A writing pen body (1), a friction nanogenerator (2) and an LED detection circuit (3); The writing pen body (1) comprises: a pen core (11) and a pen shell (12), wherein the pen shell (12) is sleeved on the outside of the pen core (11), and a recessed area is provided in the middle of the pen shell (12) along the circumferential direction; The friction nanogenerator (2) comprises: a first friction plate (21) and a second friction plate (22); The first friction plate (21) is cylindrical and made of polytetrafluoroethylene. Two copper foils (211) are arranged at intervals along the height direction on the inner side surface of the first friction plate (21), and an electrode line (212) is led out from each copper foil (211). The first friction plate (21) is fixedly sleeved on the outside of the recessed area of ​​the pen housing (12). The second friction plate (22) is cylindrical and made of polyethylene terephthalate. The height of the second friction plate (22) is smaller than that of the first friction plate (21). The second friction plate (22) is tightly mounted on the outside of the first friction plate (21) and can perform upward and downward friction movement relative to the first friction plate (21). The LED detection circuit (3) comprises: a rectifier bridge (D1), a current limiting resistor (R1), a first dial switch (K1), a filter capacitor (C1), a second dial switch (K2) and a busbar (H1); The AC input end of the rectifier bridge (D1) is respectively connected to two electrode wires (212) in the friction nanogenerator (2); the first dial switch (K1) and the filter capacitor (C1) are connected in series to form a first branch; the second dial switch (K2) and the bus bar (H1) are connected in series to form a second branch; the first branch and the second branch are connected in parallel and then connected in series with the current limiting resistor (R1) between the negative electrode and the positive electrode of the output end of the rectifier bridge (D1).

2. According to claim 1, the writing pen for detecting LED performance based on friction power supply is characterized in that: The two copper foils (211) on the inner side of the first friction plate (21) have the same width, and the width of the interval between the two copper foils (211) is the same as the width of the copper foil (211).

3. The writing pen for detecting LED performance based on friction power supply according to claim 1, characterized in that: The thickness of the first friction plate (21) is 0.05 mm-0.3 mm.

4. The writing pen for detecting LED performance based on friction power supply according to claim 1, characterized in that: The height of the second friction plate (22) is one third of the height of the first friction plate (21).

5. The writing pen for detecting LED performance based on friction power supply according to claim 1, characterized in that: The thickness of the second friction plate (22) is 0.05 mm-0.3 mm.

6. The writing pen for detecting LED performance based on friction power supply according to claim 1, characterized in that: The diameter of the second friction plate (22) is smaller than or equal to the diameter of the upper and lower edges of the recessed area in the middle of the pen housing (12).

7. The writing pen for detecting LED performance based on friction power supply according to claim 1, characterized in that: A 2P busbar (CN2) is connected in parallel between the negative electrode and the positive electrode of the output end of the rectifier bridge (D1) for external battery connection.

8. The writing pen for detecting LED performance based on friction power supply according to claim 1, characterized in that: The rectifier bridge (D1), the current limiting resistor (R1) and the filter capacitor (C1) are all located inside the pen housing (12); the two electrode wires (212) in the first friction plate (21) are connected to the AC input end of the rectifier bridge (D1) after passing through the side wall of the pen housing (12); the first dial switch (K1), the second dial switch (K2) and the female connector (H1) are all installed outside the pen housing (12).

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