Self-recognition built-in and external photoelectric induction control circuit
By self-identifying the built-in-external photoinductive control circuit, the light control type is automatically identified and automatic switching is realized, which solves the problem of manual operation of traditional light control switching, and improves the anti-interference ability and design flexibility of the circuit.
Patent Information
- Application Number
- CN202422476881.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-12
AI Technical Summary
Traditional built-in-external light control switching requires manual switching, and users can easily ignore the switching, resulting in the failure of the application and the normal photosensitive function cannot be achieved.
Design a self-identification built-in-external photoinductance control circuit, and automatically identify the light control type using photo transistors and control chips, improve anti-interference ability through delay determination and delay detection, and realize automatic switching.
Automatically identifying the light control type improves the anti-interference ability and design flexibility of the circuit, avoids the misuse of manual switching operations, and enhances the flexibility of practical applications.
Smart Images
Figure CN223261519U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic circuit control, in particular to a self-identifying built-in and external photoelectric induction control circuit. Background Art
[0002] When switching between built-in and external light control of the lighting lamp, the traditional design needs to add a control switch during the switching process. When the switch is selected to gear 1, the built-in light control is effective; when the switch is selected to gear 2, the external light control is connected. At this time, the external light control is effective. The main disadvantage of the traditional design is that it requires additional switch operation. In actual use, when switching between built-in and external light control, the user needs to perform the switch switching operation at the same time. However, during the operation, the user often connects the external light control and ignores the switch switching, which causes the application to fail and cannot realize the normal and reasonable light sensing function. Utility Model Content
[0003] The utility model aims to solve the problems existing in the prior art and provides a self-identifying built-in-external photoelectric sensing control circuit, which can automatically identify whether the built-in light control is in effect or the external light control is in effect and has strong anti-interference ability.
[0004] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:
[0005] A self-identifying built-in and external photoelectric sensing control circuit includes a bidirectional thyristor Q1, a power supply VCC, a resistor R22, a resistor R2, a resistor R3, a built-in phototransistor Q5, a resistor R4, a resistor R5, an external phototransistor Q6, a connector JP1, and a connector JP2;
[0006] The T1 terminal of the bidirectional thyristor Q1 is connected to the AC OUT terminal, one end of the resistor R22 is connected to the node of the AC IN1 terminal and the power supply VCC, and the other end is connected to the T2 terminal of the bidirectional thyristor Q1;
[0007] One end of the resistor R2 is connected to the G terminal of the bidirectional thyristor Q1, and the other end is connected to the 13 pin of the control chip IC1;
[0008] The E pole of the built-in phototransistor Q5 is grounded, and the D pole is divided into two paths, one of which is connected to the 20th pin of the control chip IC1 through the resistor R3, and the other is connected to the 17th pin of the control chip IC1;
[0009] One end of the resistor R4 is connected to pin 20 of the control chip IC1, and the other end is divided into two paths, one of which is connected to pin 1 of the connector JP1, and the other is connected to pin 18 of the control chip IC1;
[0010] One end of the resistor R5 is connected to pin 20 of the control chip IC1, and the other end is divided into two paths, one of which is connected to pin 2 of the connector JP1, and the other is connected to pin 4 of the control chip IC1;
[0011] The C pole of the external phototransistor Q6 is connected to pin 1 of the connector JP2, and the E pole is connected to pins 2 and 3 of the connector JP2.
[0012] Preferably, a potentiometer VR1 is connected between the T1 terminal and the T2 terminal of the bidirectional thyristor Q1 , and a capacitor C18 is connected between the T2 terminal and the G terminal of the bidirectional thyristor Q1 .
[0013] Preferably, pin 3 of the connector JP1 is grounded.
[0014] Preferably, pin 20 of the control chip IC1 is connected to the power supply VCC, and pin 1 of the control chip IC1 is grounded.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] When the present invention performs light control detection, the circuit internally delays the judgment by 15-60 seconds. Only when it detects that the entire detection delay interval is above or below the threshold level will the system make a judgment and control the output, effectively improving the circuit's own anti-interference ability. When in use, the default built-in light control is valid. When the external phototransistor is connected, the system automatically recognizes that the external light control is in effect, and the built-in light control is automatically shielded. When the external phototransistor is disconnected, the system automatically recognizes that the built-in light control is in effect, and the external light control is invalid. Through internal automatic recognition, the external light control is introduced into the system for automatic recognition and control. When the external light control is in effect, the external phototransistor will flexibly place the photosensitive component at any position through external leads for light-sensitive control, which is not affected by the product's own installation position or installation distance, greatly improving the flexibility of design applications and enhancing the flexibility of actual applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a circuit diagram of the utility model;
[0018] Figure 2 It is a framework diagram of the present utility model. DETAILED DESCRIPTION
[0019] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the contents of this invention, those skilled in the art may make various changes or modifications to the present invention, and that these equivalent forms also fall within the scope defined in this application.
[0020] Example: As shown in the attached Figure 1-2 As shown, the utility model is a self-identifying built-in-external photoelectric sensing control circuit, including a bidirectional thyristor Q1, a power supply VCC, a resistor R22, a resistor R2, a built-in phototransistor Q5, a resistor R4, a resistor R5, and an external phototransistor Q6. A potentiometer VR1 is connected between the T1 and T2 terminals of the bidirectional thyristor Q1, and a capacitor C18 is connected between the T2 and G terminals; the T1 terminal of the thyristor Q1 is connected to the AC OUT terminal; one end of the resistor R22 is connected to the AC The IN1 terminal is connected to the node of the power supply VCC, and the other terminal is connected to the T2 terminal of the bidirectional thyristor Q1; one terminal of the resistor R2 is connected to the G terminal of the bidirectional thyristor Q1, and the other terminal is connected to the 13th pin of the control chip IC1; the E terminal of the built-in phototransistor Q5 is grounded, and the D terminal is divided into two paths, one of which is connected to the 20th pin of the control chip IC1 through the resistor R3, and the other is connected to the 17th pin of the control chip IC1; one end of the resistor R4 is connected to the 20th pin of the control chip IC1, and the other end is divided into two paths, one of which is connected to the connector JP1 One end of the resistor R5 is connected to pin 20 of the control chip IC1, and the other end is divided into two paths, one is connected to pin 2 of the connector JP1, and the other is connected to pin 4 of the control chip IC1. Pin 3 of the connector JP1 is grounded. The C pole of the external phototransistor Q6 is connected to pin 1 of the connector JP2, and the E pole is connected to pins 2 and 3 of the connector JP2. Pin 20 of the control chip IC1 is connected to the power supply VCC, and pin 1 is grounded.
[0021] The operating principle of this utility model is as follows: a phototransistor is a device that converts light signals into electrical signals. When light shines on the internal phototransistor Q5, its resistance decreases. The stronger the light, the smaller the resistance of the internal phototransistor Q5. Conversely, the weaker the light, the larger the resistance of the internal phototransistor Q5. The voltage of the power supply VCC is divided by resistor R3 and the internal phototransistor Q5, resulting in a variable voltage that changes with light. When the light received by the internal phototransistor Q5 decreases (such as at dusk), the resistance of the internal phototransistor Q5 increases, and the divided voltage also increases. When this voltage increases to a certain level, pin 17 of the control chip IC1 detects a voltage (greater than 0.5VCC), which in turn outputs a control signal to turn on the bidirectional thyristor Q1, putting the main circuit into operation. The operating principle of the external phototransistor Q6 is similar to that of the internal phototransistor Q5.
[0022] As a photoelectric conversion photosensitive device, the phototransistor is in a critical state of light sensitivity. That is, when the light intensity sensed by the phototransistor is converted into an electrical signal and is just at the critical state of the detection threshold level, the sampled value will be a detection level that fluctuates above and below the threshold level. To avoid misjudgment of the detection process within the system, the system will perform interval delay judgment on the sensing signal. When the detection signal is greater than the threshold level for 15-60 seconds, the system will determine it as a confirmed high-level signal. At this time, the system will output a control signal, turn on the bidirectional thyristor Q1, and enter normal working state. When the detection signal is less than the threshold level for 15-60 seconds, the system will determine it as a confirmed low-level signal. At this time, the system will turn off the output control signal and turn off the bidirectional thyristor Q1. This prevents interference signals from interfering with the circuit and effectively improves the circuit's anti-interference ability.
[0023] During normal operation, pin 4 of control chip IC1 detects a high level, and pin 17 of control chip IC1 enters real-time detection mode. This means that the internal light control is enabled, while pin 18 of control chip IC1 enters automatic shielding mode, disabling external light control. When light shines on internal phototransistor Q5, triac Q1 turns off. In the absence of light, triac Q1 turns on. At this point, external phototransistor Q6 is not connected.
[0024] When JP1 and JP2 are connected, pin 4 of the control chip IC1 detects a low level. Pin 18 of the control chip IC1 enters a real-time detection state, effectively enabling external light control. Pin 17 of the control chip IC1 enters an automatic shielding state, disabling internal light control. When light shines on the external phototransistor Q6, the bidirectional thyristor Q1 turns off. When no light shines on it, the bidirectional thyristor Q1 turns on, enabling automatic recognition between internal and external photoelectric sensing and automatic switching within the system.
Claims
1. A self-identifying internal-external photoelectric sensing control circuit, characterized by: Includes bidirectional thyristor Q1, power supply VCC, resistor R22, resistor R2, resistor R3, built-in phototransistor Q5, resistor R4, resistor R5, external phototransistor Q6, connector JP1, connector JP2; The T1 terminal of the bidirectional thyristor Q1 is connected to the AC OUT terminal, one end of the resistor R22 is connected to the node of the AC IN1 terminal and the power supply VCC, and the other end is connected to the T2 terminal of the bidirectional thyristor Q1; One end of the resistor R2 is connected to the G terminal of the bidirectional thyristor Q1, and the other end is connected to the 13 pin of the control chip IC1; The E pole of the built-in phototransistor Q5 is grounded, and the D pole is divided into two paths, one of which is connected to the 20th pin of the control chip IC1 through the resistor R3, and the other is connected to the 17th pin of the control chip IC1; One end of the resistor R4 is connected to pin 20 of the control chip IC1, and the other end is divided into two paths, one of which is connected to pin 1 of the connector JP1, and the other is connected to pin 18 of the control chip IC1; One end of the resistor R5 is connected to pin 20 of the control chip IC1, and the other end is divided into two paths, one of which is connected to pin 2 of the connector JP1, and the other is connected to pin 4 of the control chip IC1; The C pole of the external phototransistor Q6 is connected to pin 1 of the connector JP2, and the E pole is connected to pins 2 and 3 of the connector JP2.
2. The self-identifying internal-external photoelectric sensing control circuit according to claim 1, characterized in that: A potentiometer VR1 is connected between the T1 terminal and the T2 terminal of the bidirectional thyristor Q1 , and a capacitor C18 is connected between the T2 terminal and the G terminal of the bidirectional thyristor Q1 .
3. The self-identifying internal-external photoelectric sensing control circuit according to claim 1, characterized in that: Pin 3 of the connector JP1 is grounded.
4. The self-identifying internal-external photoelectric sensing control circuit according to claim 1, characterized in that: Pin 20 of the control chip IC1 is connected to the power supply VCC, and pin 1 of the control chip IC1 is grounded.