Light-operated switch

Abstract

The invention belongs to the technical field of electrical automation, and provides a light-operated switch, which comprises a power supply module B1 used for providing a stable 12V direct-current power supply; the timer chip U1 is used for controlling the action of the relay J1; the photoelectric coupler U2 and the photoelectric coupler U3 are used for isolating control signals; the relay J1 is used for controlling a switch of an external load; the mains supply wiring terminal P1 distributes a power supply to the circuit; the photoelectric switch interface P2 is used for realizing circuit control according to an induced environment object; the photoresistor interface P3 is used for sensing the change of ambient light; the manual switch interface P4 allows a user to manually control the on-off of the circuit; the electrolytic capacitor C1 is used for stabilizing the delay state of the input voltage of the timer chip U1; according to the invention, the manual switch interface P4 is added, so that a user can manually control the circuit as required, and the flexibility and adaptability of use are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical automation, in particular to a light-controlled switch. Background Art

[0002] A light-operated switch is an electronic switch that uses a photoresistor as a detection element. Its main function is to control the on / off of a circuit according to the intensity of the ambient light. Light-operated switches are widely used in automatic lighting systems, automatic door control systems, solar tracking systems, light-controlled toys, security monitoring and other fields.

[0003] Existing light-operated switches usually rely only on photoresistors to sense changes in ambient light, but this single sensing method may fail to meet complex control requirements in some cases.

[0004] Therefore, those skilled in the art have proposed a light-controlled switch to solve the problems raised in the background art. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a light-operated switch to solve the problem that the existing light-operated switch usually only relies on photoresistors to sense changes in ambient light, but this single sensing method is easily unable to meet complex control requirements in some cases.

[0006] A light-operated switch, a power module B1, is used to provide a stable 12V DC power supply;

[0007] Timer chip U1 is used to control the action of relay J1;

[0008] Photocoupler U2 and photocoupler U3 are used to isolate control signals;

[0009] Relay J1, used to control the switch of external load;

[0010] The mains terminal P1 distributes the power to this circuit;

[0011] Photoelectric switch interface P2, realizes circuit control according to the sensing environment objects;

[0012] Photoresistor interface P3, used to sense changes in ambient light;

[0013] Manual switch interface P4 allows the user to manually control the on and off of the circuit;

[0014] Electrolytic capacitor C1 is used to stabilize the delay state of the input voltage of the timer chip U1;

[0015] The photoelectric switch interface P2 is connected to the photoelectric coupler U2, the photoresistor interface P3 is connected to the photoelectric coupler U3, the timer chip U1 is respectively connected to the relay J1 and the photoelectric coupler U3, the photoelectric switch interface P2 is connected to the photoelectric coupler U2, the photoelectric coupler U2 is connected to the electrolytic capacitor C1, the manual switch interface P4 is connected to the photoresistor interface P3, the manual switch interface P4 is connected to the electrolytic capacitor C1, and the timer chip U1 is respectively connected to the electrolytic capacitor C1 and the manual switch interface P4.

[0016] Preferably, the mains connection terminal P1 is connected to the power module B1 and the relay J1 respectively.

[0017] Preferably, a resistor R1 is arranged between the power module B1 and the relay J1, a resistor R2 is arranged between the photoelectric switch interface P2 and the photoelectric coupler U2, the photoelectric coupler U2 is connected to the manual switch interface P4, a resistor R3 is arranged between the photoelectric coupler U2 and the manual switch interface P4, a resistor R4 is arranged between the manual switch interface P4 and the electrolytic capacitor C1, the manual switch interface P4 is respectively connected to the electrolytic capacitor C1 and the timer chip U1 through the resistor R4, and resistors R5 and R6 are arranged between the power module B1 and the manual switch interface P4.

[0018] Preferably, the power module B1 is respectively connected to the photoelectric switch interface P2, the photoelectric coupler U2, the photoelectric coupler U3, the resistor R1, the resistor R2, the timer chip U1, and the electrolytic capacitor C1.

[0019] Preferably, the resistor R1 is respectively connected to the light-emitting diode D1, the third pin of the output terminal of the timer chip U1 and the resistor R7, the resistor R7 is connected to the light-emitting diode D2, and the light-emitting diode D2 is respectively connected to the light-emitting diode D1, the relay J1 and the timer chip U1.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention adds a photoelectric switch interface P2, which has a mutual restriction effect with the photoresistor interface P3 to limit the starting conditions of the relay J1. By adding a manual switch interface P4, the user can manually control the circuit when necessary, which increases the flexibility and adaptability of use.

[0022] 2. The present invention adopts the timer chip U1 as the control core, which can respond quickly to the light changes sensed by the photoresistor interface P3 and realize instant circuit on-off control. At the same time, the light-controlled switch can automatically control the switch of the lighting equipment according to the actual light conditions, effectively avoiding energy waste and achieving energy-saving effect.

[0023] 3. The present invention provides electrical isolation of the circuit through the photoelectric coupler U2 and the photoelectric coupler U3, enhances the stability and anti-interference ability of the system, and is suitable for various complex electromagnetic environments. At the same time, the relay J1 provides protection through the light-emitting diode D1 and the light-emitting diode D2 to prevent the reverse current from damaging the circuit. The indicator circuit composed of the light-emitting diode D2 and the resistor R7 is used to feedback the energized state of the relay J1. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The electrical schematic diagram of a light-operated switch. DETAILED DESCRIPTION

[0025] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] Embodiment 1

[0027] As attached Figure 1 As shown, the present invention provides a light-controlled switch, including a power module B1, which is a 12V, 350mA switching power supply for providing a stable 12V DC power supply; a timer chip U1, which is used to control the action of a relay J1, wherein the timer chip U1 is a NE555 chip; photoelectric couplers U2 and U3, which are used to isolate control signals; a relay J1, which is used to control the switch of an external load; a mains connection terminal P1, which distributes power to the present circuit; a photoelectric switch interface P2, which realizes circuit control according to the sensed environmental objects, and the sensed environmental objects in the present invention specifically refer to objects such as doors; a photoresistor interface P3, which is used to sense changes in ambient light; a manual switch interface P4, which allows a user to manually control the on and off of the circuit; an electrolytic capacitor C1, the capacity of the electrolytic capacitor C1 is 0.47uF, and the charge and discharge time of the electrolytic capacitor C1 is also the output delay time, and the delay time is 0.2 seconds, which is used to stabilize the delay state of the input voltage of the timer chip U1;

[0028] The photoelectric switch interface P2 is connected to the photoelectric coupler U2, the photoresistor interface P3 is connected to the photoelectric coupler U3, the photoresistor interface P3 is also connected to the timer chip U1, and is used to trigger the output change of the timer chip U1 when the light becomes dim. The timer chip U1 is respectively connected to the relay J1 and the photoelectric coupler U3, the photoelectric switch interface P2 is connected to the photoelectric coupler U2, the photoelectric coupler U2 is connected to the electrolytic capacitor C1, the manual switch interface P4 is connected to the photoresistor interface P3, the manual switch interface P4 is connected to the electrolytic capacitor C1, and the timer chip U1 is respectively connected to the electrolytic capacitor C1 and the manual switch interface P4, wherein the manual switch interface P4 is connected to the timer chip U1 to make the voltage of the electrolytic capacitor C1 greater than 8V when disconnected, triggering the relay J1 to be attracted, and the light is on; the light is off when connected.

[0029] As can be seen from the above, when the garage door rises to a position exceeding the photoelectric switch interface P2, the output of the photocoupler U2 is cut off; when the light is very dim, the photoresistor of the photoresistor interface P3 is in an open circuit state, so that the voltage of the electrolytic capacitor C1 reaches more than 8v; the 3rd pin of the timer chip U1 outputs from a high potential to a low potential, driving the relay J1 to operate, and the garage light is on at this time; when the 3rd pin of the timer chip U1 changes from a high potential to a low potential, the output of the photocoupler U3 is cut off, the electrolytic capacitor C1 is always at a voltage above 8v, the relay J1 remains energized, and the garage light remains on; when the garage door drops to a position exceeding the photoelectric switch interface P2, the output of the photocoupler U2 is connected, so that the voltage across the electrolytic capacitor C1 is lower than 4v; the output of the 3rd pin of the timer chip U1 becomes a high potential, the relay J1 is released, and the light goes out; the disconnection of the manual switch interface P4 is equivalent to the open circuit of the photoresistor P3 interface, the voltage of the electrolytic capacitor C1 is greater than 8v, the 3rd pin of the timer chip U1 becomes a low potential, the relay J1 is energized, and the light is on, otherwise, the manual switch interface P4 is connected and the light goes out.

[0030] Embodiment 2

[0031] As attached Figure 1 As shown, this embodiment is basically the same as the previous embodiment, except that the AC power terminal P1 is connected to the power module B1 and the relay J1 respectively.

[0032] Specifically, a resistor R1 is arranged between the power module B1 and the relay J1, a resistor R2 is arranged between the photoelectric switch interface P2 and the photoelectric coupler U2, the photoelectric coupler U2 is connected to the manual switch interface P4, a resistor R3 is arranged between the photoelectric coupler U2 and the manual switch interface P4, a resistor R4 is arranged between the manual switch interface P4 and the electrolytic capacitor C1, the manual switch interface P4 is respectively connected to the electrolytic capacitor C1 and the timer chip U1 through the resistor R4, a resistor R5 and a resistor R6 are arranged between the power module B1 and the manual switch interface P4, wherein the resistor R6 is an adjustable resistor with a maximum resistance value of 500k ohms, which is used to select the sensitivity of collecting light, the resistor R1 is 3.3K ohms, the resistor R2 is 3.3K ohms, the resistor R3 is 1K ohms, the resistor R4 is 120K ohms, and the resistor R5 is 20K ohms.

[0033] Furthermore, the power module B1 is respectively connected to the photoelectric switch interface P2, the photoelectric coupler U2, the photoelectric coupler U3, the resistor R1, the resistor R2, the timer chip U1, and the electrolytic capacitor C1.

[0034] Furthermore, the resistor R1 is respectively connected to the light-emitting diode D1, the third pin of the output terminal of the timer chip U1 and the resistor R7, the resistor R7 is connected to the light-emitting diode D2, the light-emitting diode D2 is respectively connected to the light-emitting diode D1, the relay J1 and the timer chip U1, the relay J1 is protected by the light-emitting diodes D1 and D2 to prevent the reverse current from damaging the circuit, and the resistor R7 is 2.2K ohms.

[0035] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0036] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0040] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0041] 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 light-operated switch, characterized in that: include, Power module B1, used to provide a stable 12V DC power supply; Timer chip U1 is used to control the action of relay J1; Photocoupler U2 and photocoupler U3 are used to isolate control signals; Relay J1, used to control the switch of external load; The mains terminal P1 distributes the power to this circuit; Photoelectric switch interface P2, realizes circuit control according to the sensing environment objects; Photoresistor interface P3, used to sense changes in ambient light; Manual switch interface P4 allows the user to manually control the on and off of the circuit; Electrolytic capacitor C1 is used to stabilize the delay state of the input voltage of the timer chip U1; The photoelectric switch interface P2 is connected to the photoelectric coupler U2, the photoresistor interface P3 is connected to the photoelectric coupler U3, the timer chip U1 is respectively connected to the relay J1 and the photoelectric coupler U3, the photoelectric switch interface P2 is connected to the photoelectric coupler U2, the photoelectric coupler U2 is connected to the electrolytic capacitor C1, the manual switch interface P4 is connected to the photoresistor interface P3, the manual switch interface P4 is connected to the electrolytic capacitor C1, and the timer chip U1 is respectively connected to the electrolytic capacitor C1 and the manual switch interface P4.

2. A light-operated switch as claimed in claim 1, characterized in that: The mains connection terminal P1 is connected to the power module B1 and the relay J1 respectively.

3. A light-operated switch as claimed in claim 2, characterized in that: A resistor R1 is arranged between the power module B1 and the relay J1, a resistor R2 is arranged between the photoelectric switch interface P2 and the photoelectric coupler U2, the photoelectric coupler U2 is connected to the manual switch interface P4, a resistor R3 is arranged between the photoelectric coupler U2 and the manual switch interface P4, a resistor R4 is arranged between the manual switch interface P4 and the electrolytic capacitor C1, the manual switch interface P4 is respectively connected to the electrolytic capacitor C1 and the timer chip U1 through the resistor R4, and resistors R5 and R6 are arranged between the power module B1 and the manual switch interface P4.

4. A light-operated switch as claimed in claim 3, characterized in that: The power module B1 is respectively connected to the photoelectric switch interface P2, the photoelectric coupler U2, the photoelectric coupler U3, the resistor R1, the resistor R2, the timer chip U1, and the electrolytic capacitor C1.

5. A light-operated switch as claimed in claim 4, characterized in that: The resistor R1 is respectively connected to the light emitting diode D1, the third pin of the output terminal of the timer chip U1 and the resistor R7, the resistor R7 is connected to the light emitting diode D2, and the light emitting diode D2 is respectively connected to the light emitting diode D1, the relay J1 and the timer chip U1.

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