Novel photoelectric control circuit

Abstract

The invention 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] The invention belongs to the technical field of circuit structure and relates to a novel photoelectric control circuit. Background Art

[0002] At present, many light control systems require separately designed light control devices, which are installed on other equipment. For example, many street lamps are currently designed with light control probes, which are separate devices that require a separate power supply and are then installed on the lamp head of the street lamp. Therefore, it is necessary to design and manufacture a light controller, and to set up a special position on the lamp head of the street lamp for installing the light controller, which also requires a part of the space. Therefore, the structure is very complex, and the material cost and installation cost are very high. Moreover, since the light control probe needs to monitor the light all the time, it requires 24-hour uninterrupted power supply. The standby power consumption of the light control system is high, which greatly increases the energy consumption. Moreover, the internal circuit of the light controller is very complex, and a microcontroller chip must be built in. After the microprocessor chip receives the photosensitive signal, it is amplified by the amplifier circuit and then controls the relay. Although this circuit realizes the automatic control function, the system cost is expensive and the installation cost is extremely high, and it is in urgent need of improvement. Summary of the invention

[0003] The purpose of the present invention is to provide a device with an ingenious structural design, in which a light control circuit is connected to a driving circuit, and a separate light controller is not required, so the cost is greatly reduced. Since there is no need to install a light controller separately, energy consumption is greatly saved, and it is very practical.

[0004] The above object is achieved by the following technical solution: a novel photoelectric control circuit, comprising a driving circuit, the driving circuit is connected to an external mains power supply, the driving circuit is provided with a main chip, the driving circuit is provided with a first connection point, the main chip is provided with a sixth pin; the sixth pin is connected to a first node; the sixth pin is a power supply pin of the main chip, and supplies power to the main chip;

[0005] The novel photoelectric control circuit also includes a light control circuit, and the light control circuit is provided with a voltage comparison component, and 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 is further provided with a photosensitive element, the photosensitive element comprises a left connection end and a right connection end, the left connection end of the photosensitive element is connected to the first connection point, and the right connection end of the photosensitive element is connected to the comparison end; the first connection end is connected to the first node; the second connection end is grounded;

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

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

[0009] The resistance value of the photosensitive element changes with the change of the external light intensity, thereby causing the voltage value at the comparison end to change;

[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 conductive.

[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, a Zener diode is provided between the second node and the third node, the anode of the Zener diode is connected to the third node, and the cathode 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 connection point.

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

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

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

[0016] Furthermore, the main chip is also provided with a first pin, the first pin 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, and the first resistor and the second resistor are startup resistors of the main chip.

[0017] Furthermore, the driving circuit is also provided with a three-winding transformer, one side of the three-winding transformer is provided with two windings, namely a first winding and a second winding, and the other side is provided with a third winding; 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 to the first node after being connected in series with the eighth resistor and the ninth diode.

[0019] Furthermore, the interface end of the light control circuit is provided with three pins, which are plug-in connected to the driving circuit; and are respectively connected to the first connection point, the first node and the ground end of the driving circuit.

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

[0021] 1. In the present invention, the light control circuit is directly designed and added to the originally required driving circuit, and no separate light controller is required; the system cost is extremely low; the production cost, installation cost, etc. are greatly saved;

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

[0023] 3. In the present invention, through ingenious design and selection of components, the power consumption of the light control control unit is extremely low; the internal voltage comparison component uses a three-pole tube instead of a relay, the system operating current is at the microampere level, and the 24-hour standby power consumption is almost 0.

[0024] 4. In the present invention, the light control circuit can also be externally provided as a module and plugged into the driving circuit, which is flexible and convenient with a high degree of matching. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram showing the structure of a driving circuit of a novel photoelectric control circuit of the present invention is shown;

[0026] Figure 2 The schematic diagram of the structure of the light control circuit of the novel photoelectric control circuit of the present invention is shown. DETAILED DESCRIPTION

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0029] like Figure 1 and Figure 2 As shown, it is a schematic diagram of the structure of the novel photoelectric control circuit of the present invention; a novel photoelectric control circuit of the present invention comprises a driving circuit, the driving circuit is connected to an external mains power supply, the driving circuit is provided with a main chip IC, the driving circuit is provided with a first connection point BUS, the main chip IC is provided with a sixth pin 6; the sixth pin 6 is connected to a first node S1; the sixth pin is a power supply pin of the main chip IC1, and supplies power to the main chip IC;

[0030] The novel photoelectric control circuit also includes a light control circuit, and the light control circuit is provided with a voltage comparison component T, and 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 is further provided with 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 end J1 of the photosensitive element J;

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

[0034] The resistance value of the photosensitive element J changes with the change of the external light intensity, so that the voltage value at the comparison terminal T3 changes;

[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 conductive.

[0036] In the present 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 AC100-277V, or the input voltage is unstable, a voltage stabilizing diode ZD1 may be provided between the second node S2 and the third node S3, the positive electrode of the voltage stabilizing diode ZD1 is connected to the third node S3, and the negative electrode of the voltage stabilizing diode ZD1 is connected to the second node S2. The voltage stabilizing diode can play a role in voltage stabilization.

[0037] A first seventh resistor R17 and a first eighth resistor R18 are connected in series between the first connection point BUS and the second connection point S2.

[0038] A fourth node S4 is provided between the right connection terminal J2 of the photosensitive element J and the comparison terminal T3, and a fifth capacitor C5 is provided between the fourth node S4 and the ground terminal; the light 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.

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

[0040] The external mains power is connected to a 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, and a first resistor R1 and a second resistor R2 are connected in series between the first pin 1 and the first connection point BUS, and the first resistor R1 and the second resistor R2 are startup resistors of the main chip IC.

[0042] 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, namely 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 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 in sequence, and then connected to the first node S1.

[0044] The interface end of the light control circuit is provided with three pins, which are plug-in connected to the driving circuit; they are respectively connected to the first connection point BUS, the first node S1 and the ground of the driving circuit.

[0045] Working principle introduction:

[0046] As an exemplary introduction, in the present invention, the entire control circuit includes a drive circuit itself used for power drive, and a light control circuit connected to the drive circuit, wherein the drive circuit includes a load circuit, and the load circuit can be understood as a street lamp head.

[0047] In the driving circuit, a first connection point BUS is provided, and a main chip IC1 is provided, and the main chip IC1 includes 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 the present invention, a voltage comparison component is provided in the light control circuit, preferably, an adjustable voltage regulator TL431; the adjustable voltage regulator TL431 has high-precision voltage reference and voltage regulation functions, and is provided with a reference voltage value; for example, TL431 is provided with a comparison terminal and two connection terminals (an anode terminal and a cathode terminal); when the voltage value of the comparison terminal is less than the reference voltage value, the TL431 is not turned on; when the voltage value of the comparison terminal reaches the reference voltage value, the TL431 is turned on.

[0049] In the light control circuit, the resistance of the photosensor changes with the change of the external light intensity. When the external light intensity is strong (daytime), the resistance of the photosensor is relatively small, and the voltage borne by the photosensor is relatively small. At this time, the voltage borne by the voltage-dividing resistor R20 is relatively large, which makes the voltage at the comparison end of TL43 relatively large, reaching above the reference voltage value, and TL431 is internally turned on. The anode end of TL431 is grounded, and the cathode end of TL431 is connected to the 6th pin of the main chip. Therefore, after being turned on, the anode end of TL431 is grounded, which is equivalent to the cathode end of TL431 being grounded. Therefore, the 6th pin of the main chip is grounded, so that the load circuit does not work, and therefore, the street lamp head does not light up.

[0050] When the external light intensity is weak (at night), the resistance of the photosensor is relatively large, and the voltage borne by the photosensor is relatively large; at this time, the voltage borne by the voltage-dividing resistor R20 is relatively small, making the voltage at the comparison end of TL43 smaller, lower than the reference voltage value, the internal part of TL431 is not conducting, and the 6th pin of the main chip is not controlled by TL431. Therefore, the main chip (IC) works normally, the load circuit works, and the street lamp head is on.

[0051] Therefore, in the present invention, the light control circuit is directly designed and added to the originally required driving circuit, and a separate light controller is not required, so that the driving circuit can have the light control function; moreover, in the present invention, the light control circuit can be designed as a plug-in device, which is plug-in connected to the original control circuit, and is very convenient to install, disassemble, and maintain, and has a wide range of applicability, does not affect the operation of the original driving circuit, and can be matched with power supplies on the market, which is very convenient.

[0052] The above description is only 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 aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel photoelectric control circuit, comprising a drive circuit, the drive circuit is connected to an external mains power supply, the drive circuit is 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 to the first node (S1); the sixth pin is a power supply pin of the main chip (IC1) and supplies power to the main chip (IC); The novel photoelectric control circuit also includes a light control circuit, and the light control circuit is provided with a voltage comparison component T, and 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); The light control circuit is further provided with a photosensitive element (J), the photosensitive element (J) comprising a left connection end (J1) and a right connection end (J2), the left connection end (J1) of the photosensitive element (J) being connected to a first connection point (BUS), and the right connection end (J2) of the photosensitive element (J) being connected to a comparison end (T3); the first connection end (T1) being connected to a first node (S1); and the second connection end (T2) being 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 (V1); The resistance value of the photosensitive element (J) changes with the change of the external light intensity, thereby causing the voltage value at the comparison terminal (T3) to change; 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 conducted.

2. The novel photoelectric control circuit according to claim 1 is characterized in that: A second node (S2) is provided between the first connection point (BUS) and the left connection end (J1) of the photosensitive element (J), a third node (S3) is provided between the second connection end (T2) and the ground end, a voltage-stabilizing diode (ZD1) is provided between the second node (S2) and the third node (S3), an anode of the voltage-stabilizing diode (ZD1) is connected to the third node (S3), and a cathode of the voltage-stabilizing diode (ZD1) is connected to the second node (S2).

3. The novel photoelectric control circuit according to claim 1 is characterized in that: A first seventh resistor (R17) and a first eighth resistor (R18) are connected in series between the first connection point (BUS) and the second connection point (S2).

4. The novel photoelectric control circuit according to claim 1 is characterized in that: A fourth node (S4) is provided between the right connection terminal (J2) of the photosensitive element (J) and the comparison terminal (T3), 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 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 is characterized in that: The voltage comparison component (T) is an adjustable voltage regulator (TL431); the second connection terminal (T2) is an anode of the adjustable voltage regulator (TL431), and the first connection terminal (T1) is a cathode of the adjustable voltage regulator (TL431).

6. The novel photoelectric control circuit according to claim 1 is characterized in that: The external mains power is connected to a rectifier bridge, and the rectifier bridge is connected to the first connection point (BUS).

7. The novel photoelectric control circuit according to claim 1 is characterized in that: The main chip (IC) is also provided with a first pin (1), the first pin (1) is connected to the first connection point (BUS), and a first resistor (R1) and a second resistor (R2) are connected in series between the first pin (1) and the first connection point (BUS), and the first resistor (R1) and the second resistor (R2) are start-up resistors of the main chip (IC).

8. The novel photoelectric control circuit according to claim 1 is characterized in that: The drive circuit is also provided with a three-winding transformer (B), one side of the three-winding transformer (B) is provided with two windings, namely 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 to the load circuit.

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

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

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