Halogen lamp heating control system

Abstract

The utility model relates to the technical field of halogen lamp heating control system, in particular to a halogen lamp heating control system, including a halogen lamp, a relay control part, a transistor control part, a light-controlled switch and an optical coupler; the relay control part is powered by an AC power supply and a DC power supply, outputs a signal to the light-controlled switch and the halogen lamp, and receives a signal from the transistor control part; the light-controlled switch is powered by a DC power supply, outputs a signal to the halogen lamp, and receives a signal from the transistor control part and the relay control part; the optical coupler is powered by a DC power supply and an AC power supply, outputs a signal to a main control module, and the main control module outputs the signal to the transistor control part. The system has the advantages of accurately controlling relays and light-controlled switches through a single-chip microcomputer, realizing complex logic and time control, reducing electromagnetic interference through an optical coupler, improving control accuracy, using high-reliability components, designing anti-interference measures, and ensuring circuit stability.

Description

Technical Field

[0001] The utility model relates to the technical field of halogen lamp heating control systems, in particular to a halogen lamp heating control system. Background Art

[0002] Traditional moisture analyzer heating control circuits excel in achieving stable heating, mainly by monitoring the temperature and adjusting the heating power accordingly to ensure the stability of the sample heating process. These circuits usually use simple control algorithms and sensor technology to control the heating process through feedback mechanisms. Since the circuit design is relatively simple and the cost is low, it is suitable for cost-sensitive application scenarios. In addition, since it has been verified by long-term practice and has a certain degree of reliability and stability, it is still widely used in some traditional moisture analyzers.

[0003] However, these traditional heating control circuits also have some limitations. First, their control accuracy may be low and cannot meet some application scenarios with high measurement accuracy requirements. Second, due to the limitations of control algorithms and sensor technology, the heating process may not be efficient enough, resulting in high energy consumption. In addition, the response speed may be slow and cannot meet some application scenarios with high heating speed requirements. In addition, these traditional circuits are usually inflexible and difficult to meet the heating control needs of different samples or different measurement requirements. Utility Model Content

[0004] In order to overcome the existing deficiencies, the utility model provides a halogen lamp heating control system.

[0005] The utility model adopts the following technical scheme to solve the technical problem: a halogen lamp heating control system, comprising a halogen lamp, a relay control part, a transistor control part, a light-controlled switch and an optical coupler; the relay control part is powered by an AC power supply and a DC power supply, outputs a signal to the light-controlled switch and the halogen lamp, and receives a signal from the transistor control part; the light-controlled switch is powered by a DC power supply, outputs a signal to the halogen lamp, and receives a signal from the transistor control part and the relay control part; the optical coupler is powered by a DC power supply and an AC power supply, outputs a signal to a main control module, and the main control module outputs the signal to the transistor control part.

[0006] According to another embodiment of the utility model, the relay control part further includes a relay J4 and a diode D2, wherein terminal 4 of the relay J4 is connected to the live wire of the AC power supply, terminal 3 is connected to the light-controlled switch and the halogen lamp, a diode D2 is connected in series between terminal 2 and terminal 1, terminal 1 is connected to the transistor control part, and terminal 2 is connected to the DC power supply.

[0007] According to another embodiment of the utility model, the light-controlled switch further includes a chip U1, pin 6 of the chip U1 is connected to the relay control part, pin 4 is connected to the halogen lamp, pin 1 is connected to the DC power supply through resistor R3, and pin 2 is connected to the transistor control part.

[0008] According to another embodiment of the utility model, the optocoupler further includes a chip U2, wherein pin 1 of the chip U2 is connected to the relay control part through a resistor R10, pin 2 is connected to the neutral line of the AC power supply through a resistor R13, pin 3 is grounded, pin 3 is connected to the DC power supply through a resistor R12, and is connected to the main control module.

[0009] According to another embodiment of the utility model, it further includes that the triode control part includes a transistor Q3 and a transistor Q4; the emitter of the transistor Q4 is grounded, the base is connected to the main control module through resistors R9 and R11, and the collector is connected to the relay control part; the emitter of the transistor Q4 is grounded, the base is connected to the main control module through resistors R7 and R8, and the collector is connected to the light-controlled switch.

[0010] According to another embodiment of the utility model, the halogen lamp further includes an LED-L port and an LED-N port of the halogen lamp, the LED-L port is connected to one end of the transistor Q2, is connected to the other end of the transistor Q2 through a capacitor C4 and a resistor R4 and is connected to a relay control part, and the LED-N port is connected to a neutral line of an AC power supply.

[0011] According to another embodiment of the utility model, the main control module is a 51 single chip microcomputer, pin P3.0 is connected to ctrl4 of the transistor control part, pin P3.3 is connected to ctrl3 of the transistor control part, and pin P2.1 is connected to ctrl2 in the optical coupler.

[0012] The beneficial effects of the utility model are that the halogen lamp control circuit design has multiple advantages, including precise control of relays and light-controlled switches through a single-chip microcomputer to achieve complex logic and time control; the optocoupler provides a zero-crossing detection signal to reduce electromagnetic interference and improve control accuracy; the optocoupler and light-controlled switch achieve high- and low-voltage isolation to protect the low-voltage control circuit and the single-chip microcomputer; the filter capacitor and resistor suppress high-frequency noise to prevent reverse current from damaging the transistor; the single-chip microcomputer program is programmable to meet the needs of different application scenarios, with strong flexibility and scalability; high-reliability components are used, and anti-interference measures are designed to ensure circuit stability; the high- and low-voltage isolation design reduces the risk of electric shock, and the voltage stabilization and reverse current protection improve safety; the modular design facilitates maintenance and upgrading, and the single-chip microcomputer control facilitates debugging and testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a circuit diagram of the utility model.

[0016] In the figure, 1, halogen lamp, 2, relay control part, 3, transistor control part, 4, light-controlled switch, 5, optical coupler, 6, AC power supply, 7, DC power supply, 8, main control module. DETAILED DESCRIPTION

[0017] like Figure 1 It is a structural schematic diagram of the utility model, a halogen lamp heating control system, comprising a halogen lamp 1, a relay control part 2, a transistor control part 3, a light-controlled switch 4 and an optical coupler 5; the relay control part 2 is powered by an AC power supply 6 and a DC power supply 7, outputs signals to the light-controlled switch 4 and the halogen lamp 1, and receives signals from the transistor control part 3; the light-controlled switch 4 is powered by a DC power supply 7, outputs signals to the halogen lamp 1, and receives signals from the transistor control part 3 and the relay control part 2; the optical coupler 5 is powered by a DC power supply 7 and an AC power supply 6, outputs signals to a main control module 8, and the main control module 8 outputs signals to the transistor control part 3.

[0018] Specifically, the DC power supply 7 provides a low-voltage working power supply for the control circuit and the relay, the AC power supply 6 is used to supply power to the load, and the main control module 8 is controlled by the single-chip microcomputer to drive the relay control part 2 and the light-controlled switch 4.

[0019] According to another embodiment of the utility model, the relay control part 2 further includes a relay J4 and a diode D2, wherein terminal 4 of the relay J4 is connected to the live wire of the AC power supply 6, terminal 3 is connected to the light-controlled switch 4 and the halogen lamp 1, a diode D2 is connected in series between terminal 2 and terminal 1, terminal 1 is connected to the transistor control part 3, and terminal 2 is connected to the DC power supply 7.

[0020] Specifically, the function of the relay control part 2 is to control the on and off of the main power supply. The relay J4 is connected to the +5V power supply of the DC power supply 7 and the collector of the transistor Q4 of the transistor control part 3. When the transistor Q4 is turned on, the coil is energized and the relay is energized. When the relay is energized, the live wire and the neutral wire of the AC power supply 6 are connected to the load through the relay contacts to control the load to be energized; the diode D2 and the resistor R9 are connected between the base of the transistor Q4 and the +5V power supply of the DC power supply 7 to prevent the reverse current from damaging the transistor Q4.

[0021] According to another embodiment of the utility model, the light-controlled switch 4 further includes a chip U1, pin 6 of the chip U1 is connected to the relay control part 2, pin 4 is connected to the halogen lamp 1, pin 1 is connected to the DC power supply 7 through the resistor R3, and pin 2 is connected to the transistor control part 3.

[0022] Specifically, the light-controlled switch 4 realizes the on-off control of the load through light control; it is controlled by the transistor Q3 of the triode control part 3. When the transistor Q3 is turned on, the internal LED of the light-controlled switch emits light, triggering the internal TRIAC to turn on; the DC power supply 7 and the load are connected, and when the TRIAC is turned on, the DC power supply 7 is connected to the load through the light-controlled switch to control the on-off of the load.

[0023] According to another embodiment of the utility model, the optocoupler 5 further includes a chip U2, wherein the pin 1 of the chip U2 is connected to the relay control part 2 through a resistor R10, the pin 2 is connected to the neutral line of the AC power supply 6 through a resistor R13, the pin 3 is grounded, the pin 3 is connected to the DC power supply 7 through a resistor R12, and is connected to the main control module 8.

[0024] Specifically, the function of the optocoupler 5 is to perform zero-crossing detection and transmit the signal to the single-chip microcomputer of the main control module 8 to achieve phase control; it is connected to the AC power supply 6 and limits the current through the resistor R10. When the voltage of the AC power supply 6 passes through zero, the voltage is low, and the chip U2 of the optocoupler 5 is turned on; it is connected to the ctrl2 of the single-chip microcomputer I / O pin of the main control module. When the primary side is turned on, the LED on the secondary side lights up, the phototransistor is turned on, and a zero-crossing detection signal is provided to the single-chip microcomputer.

[0025] According to another embodiment of the utility model, it further includes that the transistor control part 3 includes a transistor Q3 and a transistor Q4; the emitter of the transistor Q4 is grounded, the base is connected to the main control module 8 through resistors R9 and R11, and the collector is connected to the relay control part 2; the emitter of the transistor Q4 is grounded, the base is connected to the main control module 8 through resistors R7 and R8, and the collector is connected to the light-controlled switch 4.

[0026] According to another embodiment of the utility model, the halogen lamp 1 further includes an LED-L port and an LED-N port of the halogen lamp 1, the LED-L port is connected to one end of the transistor Q2, is connected to the other end of the transistor Q2 through a capacitor C4 and a resistor R4 and is connected to the relay control part 2, and the LED-N port is connected to the neutral line of the AC power supply 6.

[0027] Specifically, capacitor C4 and resistor R4 are the protection and filtering parts of the halogen lamp 1. Their function is to protect circuit components, filter out high-frequency noise in the circuit, and ensure stable operation of the circuit. They are connected at both ends of TRIAC to suppress high-frequency noise and protect TRIAC (transistor Q2) from high-frequency noise.

[0028] According to another embodiment of the utility model, the main control module 8 is a 51 single chip microcomputer, pin P3.0 is connected to ctrl4 of the transistor control part 3, pin P3.3 is connected to ctrl3 of the transistor control part 3, and pin P2.1 is connected to ctrl2 in the optical coupler 5.

[0029] Specific operation process, the single-chip microcomputer of the main control module 8 controls, when the single-chip microcomputer I / O pin outputs a high level through ctrl4, the base current of transistor Q4 flows through resistors R11 and R9, making transistor Q4 conduct, the relay J4 coil is energized, the relay is energized, and the AC power supply 6 is connected to the load through the relay J4 contact. When the single-chip microcomputer I / O pin outputs a high level through ctrl3, the base current of transistor Q3 flows through resistors R8 and R7, making transistor Q3 conduct, the internal LED of the chip U1 of the light-controlled switch 4 emits light, triggering the internal TRIAC to turn on, and the AC power supply 6 is connected to the load through the light-controlled switch. Zero-crossing detection, when the voltage of the AC power supply 6 passes through zero, the chip U2 of the optical coupler 5 is turned on, the LED on the secondary side emits light, the photosensitive transistor is turned on, and a zero-crossing detection signal is provided to the single-chip microcomputer. The single-chip microcomputer performs phase control according to the signal to adjust the load power. Protection circuit, filter capacitor C4 and resistor R4 suppress high-frequency noise and protect TRIAC from high-frequency noise; diode D2 and resistor R9 prevent reverse current from damaging transistor Q4 and transistor Q3.

[0030] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all will fall within the scope of protection of the present invention.

Claims

1. A halogen lamp heating control system, characterized in that: The invention comprises a halogen lamp (1), a relay control part (2), a transistor control part (3), a light-controlled switch (4) and a photocoupler (5); the relay control part (2) is powered by an AC power supply (6) and a DC power supply (7), outputs a signal to the light-controlled switch (4) and the halogen lamp (1), and receives a signal from the transistor control part (3); the light-controlled switch (4) is powered by a DC power supply (7), outputs a signal to the halogen lamp (1), and receives a signal from the transistor control part (3) and the relay control part (2); the photocoupler (5) is powered by a DC power supply (7) and an AC power supply (6), outputs a signal to a main control module (8), and the main control module (8) outputs a signal to the transistor control part (3).

2. The halogen lamp heating control system according to claim 1, characterized in that: The relay control part (2) comprises a relay J4 and a diode D2, wherein terminal 4 of the relay J4 is connected to the live wire of an AC power source (6), terminal 3 is connected to a light-controlled switch (4) and a halogen lamp (1), a diode D2 is connected in series between terminal 2 and terminal 1, terminal 1 is connected to the transistor control part (3), and terminal 2 is connected to a DC power source (7).

3. The halogen lamp heating control system according to claim 1, characterized in that: The light-controlled switch (4) comprises a chip U1, wherein pin 6 of the chip U1 is connected to the relay control part (2), pin 4 is connected to the halogen lamp (1), pin 1 is connected to the DC power supply (7) via a resistor R3, and pin 2 is connected to the transistor control part (3).

4. The halogen lamp heating control system according to claim 1, characterized in that: The optical coupler (5) comprises a chip U2, wherein pin 1 of the chip U2 is connected to the relay control part (2) via a resistor R10, pin 2 is connected to the neutral line of the AC power supply (6) via a resistor R13, pin 3 is grounded, and pin 3 is connected to the DC power supply (7) via a resistor R12 and is connected to a main control module (8).

5. The halogen lamp heating control system according to claim 1, characterized in that: The triode control part (3) comprises a transistor Q3 and a transistor Q4; the emitter of the transistor Q4 is grounded, the base is connected to the main control module (8) through resistors R9 and R11, and the collector is connected to the relay control part (2); the emitter of the transistor Q4 is grounded, the base is connected to the main control module (8) through resistors R7 and R8, and the collector is connected to the light-controlled switch (4).

6. The halogen lamp heating control system according to claim 1, characterized in that: The halogen lamp (1) comprises an LED-L port and an LED-N port of the halogen lamp (1), wherein the LED-L port is connected to one end of a transistor Q2, connected to the other end of the transistor Q2 via a capacitor C4 and a resistor R4 and connected to a relay control part (2), and the LED-N port is connected to a neutral line of an AC power source (6).

7. The halogen lamp heating control system according to claim 1, characterized in that: The main control module (8) is a 51 single chip microcomputer, pin P3.0 is connected to ctrl4 of the transistor control part (3), pin P3.3 is connected to ctrl3 of the transistor control part (3), and pin P2.1 is connected to ctrl2 in the optical coupler (5).

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