A wire that shows the direction of current flow

Abstract

The present invention discloses a wire capable of displaying the direction of current, comprising a wire which is a good conductor; a sampling resistor arranged in the wire, generating a potential difference at both ends thereof when current passes through; a package connected to the sampling resistor, the package comprising a voltage and current detection amplifier circuit, a controller and an LED light array; the input end of the voltage and current detection amplifier circuit is connected to the sampling resistor, picking up the potential difference signal at both ends of the sampling resistor, the voltage and current detection amplifier circuit, the controller and the LED light array are connected in sequence, the controller receives the signal of the voltage and current detection amplifier circuit, drives the LED light array to light up in sequence, and the direction in which the LED light array lights up is consistent with the current direction of the wire; and a translucent shell arranged on a part of the wire, the sampling resistor and the package. The present invention effectively solves the problem of visually displaying the direction of current in circuit teaching.

Description

Technical Field

[0001] The present invention relates to the technical field of wires and circuit control, and in particular to a wire capable of displaying the direction of current. Background Art

[0002] In the circuit teaching experiment, when the teacher talks about the direction of current, students often find it difficult to understand, because the concept of current is relatively abstract and difficult for junior high school students to understand, and the direction of current is invisible, which makes students' circuit learning lack of fun and brings certain difficulties to teaching. Therefore, in view of the shortcomings of the above scheme in actual production and implementation, it is revised and improved. At the same time, in the spirit and concept of seeking excellence, with the assistance of professional knowledge and experience, and after many ingenuity and experiments, this design is created. Therefore, a wire that can display the direction of current is provided to solve the problem that the direction of current cannot be displayed vividly in circuit teaching. Summary of the invention

[0003] One of the purposes of the present invention is to provide a wire capable of displaying the direction of electric current, so as to solve the problem that the direction of electric current cannot be displayed vividly in circuit teaching.

[0004] The wire capable of displaying the direction of current of the present invention can be realized by the following technical scheme:

[0005] The present invention discloses a wire capable of displaying the direction of current, comprising a wire which is a good conductor; a sampling resistor arranged in the wire, generating a potential difference at both ends thereof when current passes through; a package connected to the sampling resistor, the package comprising a voltage and current detection amplifier circuit, a controller and an LED lamp array; the input end of the voltage and current detection amplifier circuit is connected to the sampling resistor to pick up a potential difference signal at both ends of the sampling resistor, the voltage and current detection amplifier circuit, the controller and the LED lamp array are connected in sequence, the controller receives the signal of the voltage and current detection amplifier circuit and drives the LED lamp array to light up in sequence, and the lighting direction of the LED lamp array is consistent with the current direction of the wire; and a translucent shell arranged on a part of the wire, the sampling resistor and the package.

[0006] Preferably, two ends of the wire are respectively provided with connection terminals.

[0007] Preferably, the connecting terminal is a hook-shaped terminal.

[0008] Preferably, the sampling resistor is a low-resistance high-power resistor.

[0009] Preferably, the shell is made of a flexible translucent material.

[0010] Preferably, the shell is made of silicone.

[0011] Preferably, the two input ends of the voltage and current detection amplifier circuit are respectively connected to the two sides of the sampling resistor to pick up the potential difference signal across the sampling resistor; its two output ends are respectively connected to the controller, and a low level is output at the corresponding output end to drive the controller to control the LED light array to light up and display, and the lighting direction of the LED light array is consistent with the current direction of the wire.

[0012] Preferably, the controller is a single chip microcomputer.

[0013] Preferably, the LED lamp array is formed by connecting a plurality of LED lamps in parallel.

[0014] Preferably, the colors of the plurality of LED lights include one or more of yellow, red, blue and green.

[0015] Compared with the prior art, the conductive wire capable of displaying the direction of current of the present invention has the following beneficial effects:

[0016] The invention discloses a conductor capable of displaying the direction of current. The conductor amplifies the picked-up weak voltage and weak current through a voltage and current detection amplifier circuit, and displays the picked-up weak voltage and weak current through a single-chip microcomputer-controlled LED light array, so that the direction in which the LED light array is lit is consistent with the current direction of the conductor, thereby effectively solving the problem of visually displaying the current direction in circuit teaching. Meanwhile, the invention is easy to operate and popularize, and realizes the purpose of intuitively displaying the current direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of a conductor capable of displaying the direction of current of the present invention, including a voltage and current detection amplifier circuit;

[0019] Figure 2 yes Figure 1 The circuit connection diagram of a conductor capable of displaying the direction of current of the present invention is shown;

[0020] Figure 3 yes Figure 1 The circuit design diagram of the voltage and current detection amplifier circuit in a conductor capable of displaying the current direction of the present invention is shown.

[0021] Markings in the figure: 11, wire; 111, connecting terminal; 12, sampling resistor; 13, shell; 14, package body; 141, voltage and current detection amplifier circuit; 142, controller; 143, LED lamp array. DETAILED DESCRIPTION

[0022] 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. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying 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 creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present invention, it should be noted that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0026] In addition, in the present invention, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] See also Figure 1 and Figure 2 The present invention provides a wire capable of displaying the direction of current, which may include a wire 11, a sampling resistor 12, a shell 13 and a package 14; the wire 11 is a good conductor wire, and its function is to connect to an external circuit and to serve as a path for current; the sampling resistor 12 is arranged in the wire 11, and its function is to generate a potential difference when current passes through; the shell 13 is a translucent body, and a part of the wire 11, the sampling resistor 12 and the package 14 are fixedly arranged in the shell 13; the package 14 includes a voltage and current detection amplifier circuit 141, a controller 142 and an LED lamp array 143; the input end of the voltage and current detection amplifier circuit 141 is connected to the sampling resistor 12, and the potential difference signal at both ends of the sampling resistor 12 is picked up, and the function of the voltage and current detection amplifier circuit 141 is to detect the potential difference between the two ends of the sampling resistor 12. The potential difference across the sampling resistor 12 is amplified and processed, and the amplification and processing techniques used are all existing technologies, so they are not described in detail here. The voltage and current detection amplifier circuit 141 can identify a minimum voltage of 0.04V and a DC current of 5mA. The voltage and current detection amplifier circuit 141 can be a voltage and current detection amplifier chip or a circuit designed with discrete components; the voltage and current detection amplifier circuit 141, the controller 142, and the LED lamp array 143 are connected in sequence, and the controller 142 receives the signal from the voltage and current detection amplifier circuit 141, drives the LED lamp array 143 to light up in sequence, and the lighting direction of the LED lamp array 143 is consistent with the current direction of the wire 11. The control technology used by the controller 142 is also existing technology, so it is not described in detail here.

[0030] See also Figure 1, connecting terminals 111 are respectively provided at both ends of the wire 11, which mainly play a connecting role; in the present embodiment, the connecting terminal 111 is a hook-shaped terminal. In some other embodiments, the connecting terminal 111 may also be a ring-shaped terminal or other terminals that meet the requirements. In the present embodiment, the sampling resistor 12 is a low-resistance, high-power resistor. The material of the shell 13 is a flexible transparent material. In the present embodiment, the material of the shell 13 is silicone, which functions to protect the internal sampling resistor 12 and the package body 14, and at the same time allows the light emitted by the LED lamp array 143 to penetrate out.

[0031] See also Figure 2 In this embodiment, the two input ends of the voltage and current detection amplifier circuit 141 are respectively connected to the two sides of the sampling resistor 12 to pick up the potential difference signal at both ends of the sampling resistor 12; its two output ends are respectively connected to the controller 142, and a low level is output at the corresponding output end to drive the controller 142 to control the LED light array 143 to light up and display, and the lighting direction of the LED light array 143 is consistent with the current direction of the wire 11. In this embodiment, the controller 142 is a single-chip microcomputer; the LED light array 143 is composed of multiple LED lights connected in parallel. In this embodiment, the LED light array 143 includes six LED lights, which are light-emitting diodes, and the light colors of the multiple LED lights are one or more of yellow, red, blue, and green.

[0032] See also Figure 3 The voltage and current detection amplifier circuit 141 includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a transistor Q1, a transistor Q2 and two current detection chips IC; the resistors R1, R2, R3 and R4 form a bridge to detect the potential difference signal at both ends of the sampling resistor 12; the two current detection chips IC are precision current detection chips or specific current amplifier circuits, and the two constitute an amplifier circuit. In this embodiment, the model of the current detection chip IC is MAX471; when the amplifier circuit picks up the potential difference signal from the bridge, it triggers the corresponding transistor Q1 or Q2 to turn on, thereby inputting a low level to the corresponding I / O port of the controller 142 to control the lighting direction of the LED lamp array 143. As long as the corresponding adjustments are made, the lighting direction of the LED lamp array 143 can be made consistent with the current direction on the sampling resistor 12, that is, the current direction of the wire.

[0033] The working process of a conductor capable of displaying the direction of current of the present invention is as follows:

[0034] First, the voltage and current detection amplifier circuit 141, the controller 142 and the LED lamp array 143 are connected in sequence to form the package body 14, the two output ends of the package body 14 are connected to the two ends of the sampling resistor 12, and the shell 13 is mounted on the wire 12, the sampling resistor 13 and the package body 14; by connecting the power supply device through the connecting terminal 111, it can be observed that the light-emitting diodes in the LED lamp array 143 are lit according to a preset rule, and the direction of their lighting is consistent with the current direction of the wire 11.

[0035] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A conductor capable of displaying the direction of current, characterized in that: It comprises a wire which is a good conductor; a sampling resistor arranged in the wire, and a potential difference is generated at both ends of the wire when current passes through; a package connected to the sampling resistor, and the package comprises a voltage and current detection amplifier circuit, a controller and an LED lamp array; the input end of the voltage and current detection amplifier circuit is connected to the sampling resistor, and the potential difference signal at both ends of the sampling resistor is picked up, the voltage and current detection amplifier circuit, the controller and the LED lamp array are connected in sequence, the controller receives the signal of the voltage and current detection amplifier circuit, and drives the LED lamp array to light up in sequence, and the lighting direction of the LED lamp array is consistent with the current direction of the wire; a translucent shell is arranged on a part of the wire, the sampling resistor and the package; Wherein, the sampling resistor is a low-resistance high-power resistor; and the controller is a single-chip microcomputer.

2. A conductor capable of displaying the direction of current according to claim 1, characterized in that: Both ends of the wire are respectively provided with connection terminals.

3. A conductor capable of displaying the direction of current according to claim 2, characterized in that: The connecting terminal is a hook-shaped terminal.

4. A conductor capable of displaying the direction of current according to claim 1, characterized in that: The shell is made of a flexible translucent material.

5. A conductor capable of displaying the direction of current according to claim 4, characterized in that: The shell is made of silicone.

6. A conductor capable of displaying the direction of current according to claim 1, characterized in that: The two input ends of the voltage and current detection amplifier circuit are respectively connected to the two sides of the sampling resistor to pick up the potential difference signal at both ends of the sampling resistor; its two output ends are respectively connected to the controller, and a low level is output at the corresponding output end to drive the controller to control the LED light array to light up and display, and the lighting direction of the LED light array is consistent with the current direction of the wire.

7. A conductor capable of displaying the direction of current according to claim 1, characterized in that: The LED lamp array is formed by connecting a plurality of LED lamps in parallel.

8. A conductor capable of displaying the direction of current according to claim 7, characterized in that: The colors of the plurality of LED lights include one or more of yellow, red, blue and green.

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