Novel photoelectric control circuit

Abstract

The utility model belongs to the technical field of circuit structures, and particularly discloses a novel photoelectric control circuit. Comprising a driving circuit, the driving circuit is connected with an external mains supply, the driving circuit is provided with a main chip, the driving circuit is provided with a first connection point, and the main chip is provided with a sixth pin; the sixth pin is connected with a first node; the sixth pin is a power supply pin of the main chip and supplies power to the main chip; the novel photoelectric control circuit further comprises a light-operated control circuit, the light-operated control circuit is provided with a voltage comparison assembly, and the voltage comparison assembly comprises three connection ends, namely a first connection end, a second connection end and a comparison end. According to the invention, a light control circuit is directly designed and added to an originally needed driving circuit, and an independent light controller is not needed; the system cost is extremely low; and the production cost and the installation cost are greatly saved.

Description

Technical Field

[0001] This invention belongs to the field of circuit structure technology and relates to a novel optoelectronic control circuit. Background Technology

[0002] Currently, many light control systems require a separate light control device, which is then mounted on other equipment. For example, many streetlights are designed with a light control probe, which is a separate device requiring its own power supply. The probe is then installed on the lamp head. This necessitates the design and manufacture of a light controller, requiring a dedicated space on the lamp head for its installation, thus occupying additional space. Consequently, the structure is very complex, resulting in high material and installation costs. Furthermore, since the light control probe needs to monitor illumination continuously, it requires 24-hour uninterrupted power, leading to high standby power consumption and significantly increasing energy consumption. The internal circuitry of the light controller is also very complex, requiring a built-in microcontroller chip. This microprocessor chip receives the photosensitive signal, amplifies it, and then controls the relay. While this circuitry achieves automatic control, the system cost is exorbitant, and the installation cost is extremely high, necessitating a significant improvement. Summary of the Invention

[0003] The purpose of this invention is to provide a cleverly designed structure that connects the light control circuit to the drive circuit, eliminating the need for a separate light controller and greatly reducing costs. Because no additional light controller is required, it also saves a great deal of energy and is very practical.

[0004] The above objective is achieved through the following technical solution: a novel photoelectric control circuit, including a driving circuit, the driving circuit being connected to an external mains power supply, the driving circuit having a main chip, the driving circuit having a first connection point, the main chip having a sixth pin; the sixth pin being connected to a first node; the sixth pin being a power supply pin for the main chip, supplying power to the main chip;

[0005] The novel photoelectric control circuit also includes a light control circuit, which is equipped with a voltage comparison component. The voltage comparison component includes three connection terminals, namely a first connection terminal, a second connection terminal, and a comparison terminal.

[0006] The light control circuit also includes a photosensitive element, which includes a left connection terminal and a right connection terminal. The left connection terminal of the photosensitive element is connected to a first connection point, and the right connection terminal of the photosensitive element is connected to a comparison terminal. The first connection terminal is connected to a first node, and the second connection terminal is grounded.

[0007] At least one resistor is connected in series between the first connection point and the left connection terminal of the photosensitive element;

[0008] The voltage comparison component is provided with a voltage threshold;

[0009] The resistance of the photosensitive element changes with the intensity of external light, thereby causing a change in the voltage value at the comparison terminal.

[0010] When the voltage value at the comparison terminal is greater than the voltage threshold, the first connection terminal and the second connection terminal are internally connected.

[0011] Furthermore, a second node is provided between the first connection point and the left connection end of the photosensitive element, a third node is provided between the second connection end and the ground end, and a Zener diode is provided between the second node and the third node. The positive terminal of the Zener diode is connected to the third node, and the negative terminal of the Zener diode is connected to the second node.

[0012] Furthermore, a first seventh resistor and a first eighth resistor are connected in series between the first connection point and the second node.

[0013] Furthermore, a fourth node is provided between the right connection terminal and the comparison terminal of the photosensitive element, and a fifth capacitor is provided between the fourth node and the ground terminal; the light control circuit is also provided with a lower voltage divider resistor, which is connected in parallel with the fifth capacitor.

[0014] Furthermore, the voltage comparison component is an adjustable voltage regulator; the second connection terminal is the anode of the adjustable voltage regulator, and the first connection terminal is the cathode of the adjustable voltage regulator.

[0015] Furthermore, the external mains power is connected to the rectifier bridge, which is connected to the first connection point.

[0016] Furthermore, the main chip is also provided with a first pin, which is connected to the first connection point, and a first resistor and a second resistor are connected in series between the first pin and the first connection point. The first resistor and the second resistor are the start-up resistors of the main chip.

[0017] Furthermore, the drive circuit is also equipped with a three-winding transformer. The three-winding transformer has two windings on one side, namely the first winding and the second winding, and a third winding on the other side; the third winding is connected to the load circuit.

[0018] Furthermore, one end of the first winding is connected to the first connection point; one end of the second winding is grounded, and the other end is connected in series with the eighth resistor and the ninth diode before being connected to the first node.

[0019] Furthermore, the interface of the light control circuit has three pins that are pluggable to the drive circuit; these pins are respectively connected to the first connection point, the first node, and the ground terminal of the drive circuit.

[0020] The photoelectric control circuit of the present invention has the following beneficial effects:

[0021] 1. In this invention, the light control circuit is directly designed and added to the already required drive circuit, eliminating the need for a separate light controller; the system cost is extremely low; and production and installation costs are greatly reduced.

[0022] 2. In this system, the light control circuit uses very few external components, avoiding complex circuit design and expensive component materials. Therefore, the added cost of the circuit itself is extremely low.

[0023] 3. In this invention, through ingenious design and selection of components, the power consumption of the light control unit is extremely low; the internal voltage comparison component uses a transistor instead of a relay, the system operating current is in the microampere level, and the 24-hour standby power consumption is almost zero.

[0024] 4. In this invention, the light control circuit can also be externally mounted as a module, which can be plugged into the drive circuit, making it flexible, convenient, and highly compatible. Attached Figure Description

[0025] Figure 1 A schematic diagram of the drive circuit of the novel photoelectric control circuit of the present invention is shown;

[0026] Figure 2 A schematic diagram of the light control circuit of the novel photoelectric control circuit of the present invention is shown. Detailed Implementation

[0027] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figure 1 and Figure 2 The diagram shown is a structural schematic of the novel photoelectric control circuit of the present invention. The novel photoelectric control circuit of the present invention includes a driving circuit connected to an external mains power supply. The driving circuit has a main chip IC and a first connection point BUS. The main chip IC has a sixth pin 6. The sixth pin 6 is connected to a first node S1. The sixth pin is the power supply pin of the main chip IC, providing power to the main chip IC.

[0030] The novel photoelectric control circuit also includes a light control circuit, which is provided with a voltage comparison component T. The voltage comparison component T includes three connection terminals, namely a first connection terminal T1, a second connection terminal T2, and a comparison terminal T3.

[0031] The light control circuit also includes a photosensitive element J, which includes a left connection terminal J1 and a right connection terminal J2. The left connection terminal J1 of the photosensitive element J is connected to the first connection point BUS, and the right connection terminal J2 of the photosensitive element J is connected to the comparison terminal T3. The first connection terminal T1 is connected to the first node S1, and the second connection terminal T2 is grounded.

[0032] At least one resistor is connected in series between the first connection point BUS and the left connection terminal J1 of the photosensitive element J;

[0033] The voltage comparison component T is provided with a voltage threshold V1;

[0034] The resistance of the photosensitive element J changes with the intensity of external light, thereby causing a change in the voltage value at the comparison terminal T3.

[0035] When the voltage value at the comparison terminal T3 is greater than the voltage threshold V1, the first connection terminal T1 and the second connection terminal T2 are internally connected.

[0036] In this invention, a second node S2 is provided between the first connection point BUS and the left connection terminal J1 of the photosensitive element J, and a third node S3 is provided between the second connection terminal T2 and the ground terminal. When the AC voltage is between 100-277V, or when the input voltage is unstable, a Zener diode ZD1 can be provided between the second node S2 and the third node S3. The positive terminal of the Zener diode ZD1 is connected to the third node S3, and the negative terminal of the Zener diode ZD1 is connected to the second node S2. This Zener diode can perform voltage stabilization.

[0037] A first seven-resistor R17 and a first eight-resistor R18 are connected in series between the first connection point BUS and the second node S2.

[0038] A fourth node S4 is provided between the right connection terminal J2 and the comparison terminal T3 of the photosensitive element J, and a fifth capacitor C5 is provided between the fourth node S4 and the ground terminal; the light control circuit is also provided with a lower voltage divider resistor R20, which is connected in parallel with the fifth capacitor.

[0039] The voltage comparison component T is an adjustable voltage regulator TL431; the second connection terminal T2 is the anode of the adjustable voltage regulator TL431, and the first connection terminal T1 is the cathode of the adjustable voltage regulator TL431.

[0040] The external mains power is connected to the rectifier bridge, and the rectifier bridge is connected to the first connection point BUS.

[0041] The main chip IC is also provided with a first pin 1, which is connected to the first connection point BUS. A first resistor R1 and a second resistor R2 are connected in series between the first pin 1 and the first connection point BUS. The first resistor R1 and the second resistor R2 are the start-up resistors of the main chip IC.

[0042] The drive circuit also includes a three-winding transformer B, which has two windings on one side, namely a first winding B1 and a second winding B2, and a third winding B3 on the other side; the third winding B3 is connected to the load circuit.

[0043] One end of the first winding B1 is connected to the first connection point BUS; one end of the second winding B2 is grounded, and the other end is connected in series with the eighth resistor R8 and the ninth diode D9, and then connected to the first node S1.

[0044] The interface of the light control circuit has three pins, which are pluggable to the drive circuit; they are respectively connected to the first connection point BUS, the first node S1 and the ground of the drive circuit.

[0045] Working principle introduction:

[0046] As an example, in this invention, the entire control circuit includes a drive circuit that is itself used for power supply driving, and a light control circuit installed on the drive circuit. The drive circuit includes a load circuit, which can be understood as a street lamp head.

[0047] In the driving circuit, there is a first connection point BUS and a main chip IC1, which has 8 pins. In the light control circuit, one end is connected to the first connection point BUS of the driving circuit, and the other end is connected to pin 6 of the main chip IC1. The sixth pin is the power supply pin of the main chip (IC1) and supplies power to the main chip (IC). If the sixth pin is grounded, the sixth pin of the main chip IC cannot be powered.

[0048] In this invention, the light control circuit includes a voltage comparison component, preferably an adjustable voltage regulator TL431. The adjustable voltage regulator TL431 has high-precision voltage reference and voltage regulation functions, and has a reference voltage value. For example, TL431 has a comparison terminal and two connection terminals (one anode and one cathode). When the voltage value at the comparison terminal is less than the reference voltage value, TL431 is not internally conductive; when the voltage value at the comparison terminal reaches the reference voltage value, TL431 is internally conductive.

[0049] In the light control circuit, the resistance of the photosensitive element changes with the intensity of external light. When the external light intensity is strong (daytime), the resistance of the photosensitive element is relatively small, and the voltage it bears is relatively small. At this time, the voltage across the voltage divider resistor R20 is larger, resulting in a larger voltage at the comparator terminal of TL43, exceeding the reference voltage value, and TL431 internally conducts. The anode of TL431 is grounded, and the cathode of TL431 is connected to pin 6 of the main chip. Therefore, after conduction, grounding the anode of TL431 is equivalent to grounding the cathode of TL431 as well. Consequently, pin 6 of the main chip is grounded, causing the load circuit to not work, and therefore, the street light head does not light up.

[0050] When the external light intensity is weak (at night), the resistance of the photosensitive element is relatively large, and the voltage borne by the photosensitive element is relatively large. At this time, the voltage borne by the voltage divider resistor R20 is relatively small, which makes the voltage at the comparator terminal of TL43 small, lower than the reference voltage value. TL431 is not internally conducting, and pin 6 of the main chip is not controlled by TL431. Therefore, the main chip (IC) works normally, the load circuit works, and the street light head lights up.

[0051] Therefore, in this invention, the light control circuit is directly designed and added to the original driving circuit, eliminating the need for a separate light controller, thus enabling the driving circuit to have light control functionality. Moreover, in this invention, the light control circuit can be designed as a pluggable device, allowing for pluggable connection with the original control circuit. This makes installation, disassembly, and maintenance very convenient, and it has wide applicability, does not affect the operation of the original driving circuit, and can be matched with commercially available power supplies, making it very convenient.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel photoelectric control circuit comprising a driving circuit connected to an external commercial power supply, said driving circuit being provided with a main chip (IC), characterized in that, The driving circuit is provided with a first connection point (BUS), and the main chip (IC) is provided with a sixth pin (6); the sixth pin (6) is connected with a first node (S1); the sixth pin is a power supply pin of the main chip (IC) and supplies power for the main chip (IC); The novel photoelectric control circuit further comprises a light control control circuit, and the light control control circuit is provided with a voltage comparison component T; the voltage comparison component (T) comprises three connection ends, namely a first connection end (T1), a second connection end (T2) and a comparison end (T3); The light control control circuit is further provided with a photosensitive element (J), and the photosensitive element (J) comprises a left connection end (J1) and a right connection end (J2); the left connection end (J1) of the photosensitive element (J) is connected with the first connection point (BUS), and the right connection end (J2) of the photosensitive element (J) is connected with the comparison end (T3); the first connection end (T1) is connected with the first node (S1); and the second connection end (T2) is grounded. At least one resistor is connected in series between the first connection point (BUS) and the left connection end (J1) of the photosensitive element (J); The voltage comparison component (T) is provided with a voltage threshold value (V1); The resistance value of the photosensitive element (J) changes with the change of external light intensity, so that the voltage value at the comparison end (T3) changes; When the voltage value at the comparison end (T3) is greater than the voltage threshold value (V1), the first connection end (T1) and the second connection end (T2) are internally conducted.

2. The novel photoelectric control circuit according to claim 1, characterized in that, The first connection point (BUS) and the left connection end (J1) of the photosensitive element (J) are provided with a second node (S2), the second connection end (T2) and the ground end are provided with a third node (S3), a voltage stabilizing diode (ZD1) is arranged between the second node (S2) and the third node (S3), the positive electrode of the voltage stabilizing diode (ZD1) is connected with the third node (S3), and the negative electrode of the voltage stabilizing diode (ZD1) is connected with the second node (S2).

3. The novel photoelectric control circuit according to claim 2, characterized in that, The first connection point (BUS) and the second node (S2) are connected in series with a first seventh resistor (R17) and a first eighth resistor (R18).

4. The novel photoelectric control circuit according to claim 1, characterized in that, The right connection end (J2) of the photosensitive element (J) and the comparison end (T3) are further provided with a fourth node (S4), and the fourth node (S4) and the ground end are provided with a fifth capacitor (C5); the light control control circuit is further provided with a lower voltage dividing resistor (R20), and the lower voltage dividing resistor (R20) is connected in parallel with the fifth capacitor.

5. The novel photoelectric control circuit according to claim 1, characterized in that, The voltage comparison component (T) is an adjustable voltage stabilizer (TL431); the second connection end (T2) is the anode of the adjustable voltage stabilizer (TL431), and the first connection end (T1) is the cathode of the adjustable voltage stabilizer (TL431).

6. The novel photoelectric control circuit according to claim 1, wherein The external commercial power is connected to a rectifier bridge, and the rectifier bridge is connected with the first connection point (BUS).

7. The novel photoelectric control circuit according to claim 1, wherein The main chip (IC) is further provided with a first pin (1), the first pin (1) is connected with the first connecting point (BUS), and a first resistor (R1) and a second resistor (R2) are connected in series between the first pin (1) and the first connecting point (BUS), and the first resistor (R1) and the second resistor (R2) are start resistors of the main chip (IC).

8. The novel photoelectric control circuit according to claim 1, wherein The driving circuit is further provided with a three-winding transformer (B), one side of the three-winding transformer (B) is provided with two windings, which are a first winding (B1) and a second winding (B2), and the other side is provided with a third winding (B3); the third winding (B3) is connected with the load circuit.

9. The novel photoelectric control circuit according to claim 8, characterized in that, One end of the first winding (B1) is connected with the first connecting point (BUS); one end of the second winding (B2) is grounded, and the other end is connected with the first node (S1) in sequence after being connected with an eighth resistor (R8) and a ninth diode (D9) in series.

10. The novel photoelectric control circuit according to claim 1, characterized in that, The interface end of the light control control circuit is provided with three pins and is connected with the driving circuit in a plug-in mode; the first connecting point (BUS) of the driving circuit, the first node (S1) and the ground end are connected respectively.

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