Analog optical transmission device high-efficiency transmitting module

Abstract

The utility model relates to the technical field of optical transmitter, concretely relates to a kind of high-efficiency emission module of analog optical transmission equipment, including optical transmitter, circuit board is fixed in optical transmitter, signal processor, laser and controller are fixed in the top surface of circuit board, heating rod and fan are also installed in optical transmitter, controller includes detection circuit, amplification circuit, speed regulation circuit and heating circuit, detection circuit detects temperature based on Wheatstone bridge, amplification circuit is used to amplify the detection signal output by detection circuit, speed regulation circuit is used to adjust the speed of fan, and heating circuit is used to control the switch of heating rod.In the utility model, low gear operation reduces energy consumption at low temperature, high gear operation strengthens heat dissipation at high temperature, which meets the heat dissipation demand while avoiding energy waste;heating circuit forms linkage control with speed regulation circuit through inverter U2, ensures normal start and operation of equipment in low-temperature environment, and significantly improves the working stability of module.

Description

Technical Field

[0001] This utility model relates to the field of optical transmitter technology, and more specifically, to a high-efficiency transmission module for an analog optical transmission device. Background Technology

[0002] In analog optical transmission equipment, the transmitter module is the core component, and its operational stability directly affects the transmission quality of optical signals and the service life of the equipment. Core components such as lasers and signal processors within the transmitter module are sensitive to operating temperature. Excessive temperature can lead to signal distortion and increased bit error rate, while excessively low temperature can affect the startup efficiency of components and reduce the response speed of the equipment.

[0003] A visible light communication transmitter is disclosed in the utility model patent with publication number CN219228211U. It relates to the field of optical communication technology and includes an optical transmitter body. An adjustable heat dissipation device is movably connected to the bottom of the optical transmitter body. The adjustable heat dissipation device includes a contact base plate. The contact base plate has multiple heat dissipation holes inside. An arc-shaped limiting plate is fixedly connected to one end of the contact base plate.

[0004] Although this utility model directly replaces the outer shell at the bottom of the optical transmitter by using a contact base plate, and a cooling fan facing opposite directions is installed on the mounting plate below the contact base plate, where the first cooling fan can directly blow out the heat inside the optical transmitter, and the second cooling fan can accelerate the airflow around the optical transmitter, thereby accelerating the heat dissipation speed and preventing heat from accumulating around the optical transmitter, thus improving the heat dissipation efficiency of the adjustable heat dissipation device, the heat dissipation method is a fixed-speed fan, lacking a flexible speed adjustment mechanism. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency transmission module for an analog optical transmission device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A high-efficiency transmission module for an analog optical transmission device includes an optical transmitter. A circuit board is fixed inside the optical transmitter. A signal processor, a laser, and a controller are fixed on the top surface of the circuit board. The signal processor and the laser are electrically connected. The signal processor receives analog signals and performs filtering and amplification processing. The laser receives the electrical signal output by the signal processor and drives its core components in the form of current. A heating rod and a fan are also installed inside the optical transmitter. The controller includes a detection circuit, an amplification circuit, a speed control circuit, and a heating circuit. The output of the detection circuit is connected to the input of the amplification circuit. The inputs of the speed control circuit and the heating circuit are simultaneously connected to the output of the amplification circuit. The detection circuit detects temperature based on a Wheatstone bridge. The amplification circuit amplifies the detection signal output by the detection circuit. The speed control circuit adjusts the speed of the fan. The heating circuit controls the switching of the heating rod.

[0007] Preferably, the detection circuit includes a power supply VCC, resistors R1, R2, and R3, a thermistor RT, and a potentiometer RV, wherein the thermistor RT is a negative temperature coefficient thermistor. The first terminal of resistor R1 is connected to the first terminal of resistor R3, the second terminal of resistor R1 is connected to the power supply VCC, and the second terminal of resistor R3 is grounded. The first terminal of resistor R2 is connected to power supply VCC, the second terminal of resistor R2 is connected to the second terminal of potentiometer RV, the first terminal and the movable terminal of potentiometer RV are both connected to the second terminal of the temperature-sensitive resistor RT, and the first terminal of the temperature-sensitive resistor RT is grounded. Preferably, the amplifier circuit includes resistors R4, R5, R6, and R7, capacitor C, resistor R8, and operational amplifier U1. The first terminal of resistor R4 is connected to the second terminal of resistor R2, and the second terminal of resistor R4 is connected to the non-inverting input terminal of operational amplifier U1. The first terminal of resistor R5 is connected to the first terminal of resistor R1, and the second terminal of resistor R5 is connected to the inverting input terminal of operational amplifier U1. The first terminal of resistor R6 is grounded, and the second terminal of resistor R6 is connected to the non-inverting input terminal of operational amplifier U1. The first terminal of resistor R7 is connected to the inverting input terminal of operational amplifier U1, and the second terminal of resistor R7 is connected to the output terminal of operational amplifier U1. The first terminal of capacitor C is connected to the first terminal of resistor R7, and the second terminal of capacitor C is connected to the second terminal of resistor R7. The first terminal of resistor R8 is connected to the output terminal of operational amplifier U1. Preferably, the speed control circuit includes a diode D1, resistors R9, R10, R11, R12 and transistor Q1, wherein transistor Q1 is an NPN transistor. The positive terminal of diode D1 is connected to the second terminal of resistor R8, the negative terminal of diode D1 is connected to the first terminal of resistor R9, the second terminal of resistor R9 is connected to the base of transistor Q1, the first terminal of resistor R10 is connected to the second terminal of resistor R9, the second terminal of resistor R10 is grounded, the first terminal of resistor R11 is connected to power supply VCC, the second terminal of resistor R11 is connected to the first terminal of the fan, the second terminal of the fan is connected to the first terminal of resistor R12, the second terminal of resistor R12 is grounded, the collector of transistor Q1 is connected to the first terminal of resistor R12, and the emitter of transistor Q1 is connected to the second terminal of resistor R12. Preferably, the heating circuit includes an inverter U2, a diode D2, a resistor R13, a resistor R14, a resistor R15, and a transistor Q2, wherein the transistor Q2 is an NPN transistor. The input terminal of inverter U2 is connected to the second terminal of resistor R8, the output terminal of inverter U2 is connected to the positive terminal of diode D2, the negative terminal of diode D2 is connected to the first terminal of resistor R13, the second terminal of resistor R13 is connected to the base of transistor Q2, the first terminal of resistor R14 is connected to the second terminal of resistor R13, the second terminal of resistor R14 is grounded, the first terminal of resistor R15 is connected to power supply VCC, the second terminal of resistor R15 is connected to the first terminal of the heating rod, the second terminal of the heating rod is connected to the collector of transistor Q2, and the emitter of transistor Q2 is grounded. These four settings enable efficient collaboration between temperature detection, signal amplification, speed regulation, and heating control, accurately capturing temperature changes and converting them into reliable control signals. This achieves both intelligent adaptation of fan speed and timely response of the heating function, allowing the module to maintain stable operation under different temperature conditions while reducing unnecessary energy consumption.

[0008] Preferably, the signal processor receives analog signals via a data line, and the laser outputs optical signals via an optical fiber; This setting effectively isolates the influence of external electromagnetic interference on the input signal by selecting an appropriate signal transmission medium, while reducing losses during the optical signal output process, thus ensuring both the purity of signal processing and the reliability of optical transmission.

[0009] Preferably, the optical transmitter has several heat dissipation holes regularly opened on both the left and right side walls, and the heating rod and the fan are both installed on the left side wall, with the heating rod located between the fan and the left side wall of the optical transmitter; This setting optimizes the airflow path inside the optical transmitter, allowing heat to spread quickly and evenly inside the device during heating, and accelerating the expulsion of hot air during heat dissipation, further improving the timeliness and uniformity of temperature regulation.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a detection circuit with a Wheatstone bridge structure and an amplification circuit composed of an operational amplifier U1 to effectively reduce temperature sampling errors, quickly capture internal temperature fluctuations of the equipment, provide a reliable signal basis for subsequent speed regulation and heating control, and ensure that the core components are always in a suitable temperature environment.

[0011] 2. This utility model uses transistor Q1 to achieve wind speed regulation. When the temperature is low, the low speed is used to reduce energy consumption, and when the temperature is high, the high speed is used to enhance heat dissipation. While meeting the heat dissipation requirements, energy waste is avoided, and it is suitable for use in different temperature scenarios. The heating circuit forms a linkage control with the speed regulation circuit through inverter U2. When the temperature is low, the heating rod starts to heat up quickly, ensuring that the equipment can start and operate normally in low temperature environments, and significantly improving the stability of the module. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a circuit diagram of the detection circuit and the amplification circuit in this utility model; Figure 3 This is a circuit diagram of the speed control circuit, heating circuit, heating rod, and fan in this utility model; In the picture: 100. Optical transmitter; 101. Heat dissipation hole; 200. Circuit board; 300. Signal processor; 400. Data cable; 500. Laser; 600, optical fiber; 700. Controller; 701. Detection circuit; 702. Amplification circuit; 703. Speed ​​control circuit; 704. Heating circuit; 800. Heating rod; 900, Fan. Detailed Implementation

[0013] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] Please see Figures 1-3 The present invention provides the following technical solution: A high-efficiency transmission module for an analog optical transmission device includes an optical transmitter 100. A circuit board 200 is fixed inside the optical transmitter 100. A signal processor 300, a laser 500, and a controller 700 are fixed on the top surface of the circuit board 200. The signal processor 300 and the laser 500 are electrically connected. The signal processor 300 receives analog signals and performs filtering and amplification processing. The laser 500 receives the electrical signals output by the signal processor 300 and drives its core components in the form of current. By filtering and amplifying the analog signals through the signal processor 300, the purity of the signals received by the laser 500 is improved, ensuring the output of the optical signal. In addition to the quality control, the light transmitter 100 also includes a heating rod 800 and a fan 900. The controller 700 includes a detection circuit 701, an amplifier circuit 702, a speed control circuit 703, and a heating circuit 704. The output of the detection circuit 701 is connected to the input of the amplifier circuit 702. The inputs of the speed control circuit 703 and the heating circuit 704 are simultaneously connected to the output of the amplifier circuit 702. The detection circuit 701 detects temperature based on a Wheatstone bridge. The amplifier circuit 702 amplifies the detection signal output by the detection circuit 701. The speed control circuit 703 adjusts the speed of the fan 900. The heating circuit 704 controls the switching on and off of the heating rod 800.

[0015] In this embodiment, please refer to Figure 2 and Figure 3 The detection circuit 701 includes a power supply VCC, resistors R1, R2, and R3, a thermistor RT, and a potentiometer RV. The thermistor RT is a negative temperature coefficient thermistor, and its resistance decreases as the temperature increases. The potentiometer RV can flexibly adjust the balance of the bridge to adapt to different temperature detection threshold requirements. The first terminal of resistor R1 is connected to the first terminal of resistor R3, the second terminal of resistor R1 is connected to the power supply VCC, and the second terminal of resistor R3 is grounded. The first terminal of resistor R2 is connected to the power supply VCC, the second terminal of resistor R2 is connected to the second terminal of potentiometer RV, the first terminal and the movable terminal of potentiometer RV are both connected to the second terminal of the temperature-sensitive resistor RT, and the first terminal of the temperature-sensitive resistor RT is grounded.

[0016] Specifically, the amplifier circuit 702 includes resistors R4, R5, R6, R7, capacitor C, resistor R8, and operational amplifier U1. Since the voltage signal output by the detection circuit 701 is relatively small, and there is a voltage drop between diodes D1 and D2 in the subsequent circuit, the amplifier circuit 702 is needed to amplify the voltage signal. The first terminal of resistor R4 is connected to the second terminal of resistor R2, and the second terminal of resistor R4 is connected to the non-inverting input terminal of operational amplifier U1. The first terminal of resistor R5 is connected to the first terminal of resistor R1, and the second terminal of resistor R5 is connected to the inverting input terminal of operational amplifier U1. The first terminal of resistor R6 is grounded, and the second terminal of resistor R6 is connected to the non-inverting input terminal of operational amplifier U1. The first terminal of resistor R7 is connected to the inverting input terminal of operational amplifier U1, and the second terminal of resistor R7 is connected to the output terminal of operational amplifier U1. The first terminal of capacitor C is connected to the first terminal of resistor R7, and the second terminal of capacitor C is connected to the second terminal of resistor R7. The first terminal of resistor R8 is connected to the output terminal of operational amplifier U1.

[0017] Furthermore, the speed control circuit 703 includes diode D1, resistors R9, R10, R11, R12, and transistor Q1. Transistor Q1 is an NPN transistor. The speed of fan 900 is controlled by turning transistor Q1 on and off. When transistor Q1 is off, power supply VCC supplies power to resistors R11, fan 900, and resistor R12, and fan 900 runs at low speed. When transistor Q1 is on, power supply VCC supplies power to resistors R11 and fan 900, and fan 900 runs at high speed. The positive terminal of diode D1 is connected to the second terminal of resistor R8, the negative terminal of diode D1 is connected to the first terminal of resistor R9, the second terminal of resistor R9 is connected to the base of transistor Q1, the first terminal of resistor R10 is connected to the second terminal of resistor R9, the second terminal of resistor R10 is grounded, the first terminal of resistor R11 is connected to power supply VCC, the second terminal of resistor R11 is connected to the first terminal of fan 900, the second terminal of fan 900 is connected to the first terminal of resistor R12, the second terminal of resistor R12 is grounded, the collector of transistor Q1 is connected to the first terminal of resistor R12, and the emitter of transistor Q1 is connected to the second terminal of resistor R12.

[0018] In addition, the heating circuit 704 includes an inverter U2, a diode D2, a resistor R13, a resistor R14, a resistor R15, and a transistor Q2. The transistor Q2 is an NPN transistor. When the base of the transistor Q2 is at a high level, the heating rod 800 is working. The input terminal of inverter U2 is connected to the second terminal of resistor R8. The output terminal of inverter U2 is connected to the positive terminal of diode D2. The negative terminal of diode D2 is connected to the first terminal of resistor R13. The second terminal of resistor R13 is connected to the base of transistor Q2. The first terminal of resistor R14 is connected to the second terminal of resistor R13. The second terminal of resistor R14 is grounded. The first terminal of resistor R15 is connected to power supply VCC. The second terminal of resistor R15 is connected to the first terminal of heating rod 800. The second terminal of heating rod 800 is connected to the collector of transistor Q2. The emitter of transistor Q2 is grounded.

[0019] In this embodiment, please refer to Figure 1The signal processor 300 receives analog signals through the data line 400, and the laser 500 outputs optical signals through the optical fiber 600. The data line 400 needs to use shielding material to effectively isolate external electromagnetic interference, ensuring that the analog signals received by the signal processor 300 are pure and improving the accuracy of the processed signals. The optical fiber 600 has low loss and anti-interference characteristics, which can ensure the stable quality of the optical signal output by the laser 500 during transmission, reduce signal distortion and bit error rate, and improve the reliability of analog optical transmission.

[0020] In this embodiment, please refer to Figure 1 The optical transmitter 100 has several heat dissipation holes 101 regularly opened on both the left and right side walls. The heating rod 800 and the fan 900 are both installed on the left side wall. The heating rod 800 is located between the fan 900 and the left side wall of the optical transmitter 100. The fan 900 can quickly blow the heat generated by the heating rod 800 into the optical transmitter 100 to achieve uniform heating. At the same time, in the heat dissipation mode, the fan 900 can accelerate the exhaust of internal hot air through the heat dissipation holes 101 on the right side wall to form efficient convection heat dissipation and further improve the temperature regulation efficiency of the module.

[0021] When the high-efficiency transmission module of the analog optical transmission device of this utility model is in use, the signal processor 300 receives external analog signals through the data line 400, and the internal circuit filters and amplifies the signals to ensure the purity and stability of the output signal. The signal processor 300 transmits the processed electrical signal to the laser 500. The laser 500 converts the electrical signal into a current that drives its own core component. The core component is excited by the current to generate an optical signal, which is finally transmitted to an external optical receiving device through the optical fiber 600 to complete the analog optical transmission. The fan 900 starts up together with the signal processor 300 and the laser 500. The signal processor 300 and the laser 500 generate heat when they are working, so the fan 900 needs to run continuously. In high-temperature scenarios, the resistance of the thermistor RT decreases, causing an imbalance in the bridge circuit of detection circuit 701. The voltage at the second terminal of resistor R2 is greater than the voltage at the first terminal of resistor R1. After being amplified by amplifier circuit 702, a high-level output is generated. One path of the high-level output is transmitted to the base of transistor Q1 through diode D1 and resistor R9, turning on transistor Q1. Resistor R12 is effectively short-circuited, thereby increasing the current flowing through fan 900 and increasing the fan speed. The other path of the high-level output is converted to a low-level output through inverter U2, after which it cannot pass through diode D2, transistor Q2 is cut off, and heating rod 800 does not work. In low-temperature scenarios, the resistance of the thermistor RT increases, causing an imbalance in the bridge circuit of detection circuit 701. The voltage at the second terminal of resistor R2 is less than the voltage at the first terminal of resistor R1. After being amplified by amplifier circuit 702, a low-level output is generated. One path of the low-level output cannot pass through diode D1, so transistor Q1 is cut off. Power supply VCC supplies power to resistor R11, fan 900, and resistor R12, causing fan 900 to run at low speed. The other path of the low-level output is converted to a high-level output by inverter U2, and then transmitted to the base of transistor Q2 through diode D2 and resistor R13. Transistor Q2 is turned on, heating rod 800 operates, and fan 900 assists in the even diffusion of heat into light transmitter 100. The starting temperature values ​​corresponding to the speed control circuit 703 and the heating circuit 704 can be changed by altering the resistance value of potentiometer RV, allowing for flexible adaptation of the temperature control logic to the actual operating environment.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency transmission module for an analog optical transmission device, comprising an optical transmitter (100), characterized in that: The optical transmitter (100) has a circuit board (200) fixed inside. A signal processor (300), a laser (500), and a controller (700) are fixed on the top surface of the circuit board (200). The signal processor (300) and the laser (500) are electrically connected. The signal processor (300) receives analog signals and performs filtering and amplification. The laser (500) receives the electrical signals output by the signal processor (300) and drives the laser core component in the form of current. The optical transmitter (100) also has a heating rod (800) and a fan (900). The controller (700) includes a detection circuit. The circuit includes a detection circuit (701), an amplifier circuit (702), a speed control circuit (703), and a heating circuit (704). The output of the detection circuit (701) is connected to the input of the amplifier circuit (702). The inputs of the speed control circuit (703) and the heating circuit (704) are simultaneously connected to the output of the amplifier circuit (702). The detection circuit (701) detects temperature based on a Wheatstone bridge. The amplifier circuit (702) amplifies the detection signal output by the detection circuit (701). The speed control circuit (703) adjusts the speed of the fan (900). The heating circuit (704) controls the switching of the heating rod (800).

2. The high-efficiency transmission module for analog optical transmission equipment according to claim 1, characterized in that: The detection circuit (701) includes a power supply VCC, resistors R1, R2, and R3, a thermistor RT, and a potentiometer RV. The thermistor RT is a negative temperature coefficient thermistor. The first terminal of resistor R1 is connected to the first terminal of resistor R3, the second terminal of resistor R1 is connected to the power supply VCC, and the second terminal of resistor R3 is grounded. The first terminal of resistor R2 is connected to the power supply VCC, the second terminal of resistor R2 is connected to the second terminal of potentiometer RV, the first terminal and the movable terminal of potentiometer RV are both connected to the second terminal of the temperature-sensitive resistor RT, and the first terminal of the temperature-sensitive resistor RT is grounded.

3. The high-efficiency transmission module for analog optical transmission equipment according to claim 2, characterized in that: The amplifier circuit (702) includes resistors R4, R5, R6, R7, capacitor C, resistor R8, and operational amplifier U1; The first terminal of resistor R4 is connected to the second terminal of resistor R2, and the second terminal of resistor R4 is connected to the non-inverting input terminal of operational amplifier U1. The first terminal of resistor R5 is connected to the first terminal of resistor R1, and the second terminal of resistor R5 is connected to the inverting input terminal of operational amplifier U1. The first terminal of resistor R6 is grounded, and the second terminal of resistor R6 is connected to the non-inverting input terminal of operational amplifier U1. The first terminal of resistor R7 is connected to the inverting input terminal of operational amplifier U1, and the second terminal of resistor R7 is connected to the output terminal of operational amplifier U1. The first terminal of capacitor C is connected to the first terminal of resistor R7, and the second terminal of capacitor C is connected to the second terminal of resistor R7. The first terminal of resistor R8 is connected to the output terminal of operational amplifier U1.

4. The high-efficiency transmission module for analog optical transmission equipment according to claim 3, characterized in that: The speed control circuit (703) includes diode D1, resistor R9, resistor R10, resistor R11, resistor R12 and transistor Q1, wherein transistor Q1 is an NPN transistor; The positive terminal of diode D1 is connected to the second terminal of resistor R8, the negative terminal of diode D1 is connected to the first terminal of resistor R9, the second terminal of resistor R9 is connected to the base of transistor Q1, the first terminal of resistor R10 is connected to the second terminal of resistor R9, the second terminal of resistor R10 is grounded, the first terminal of resistor R11 is connected to power supply VCC, the second terminal of resistor R11 is connected to the first terminal of the fan (900), the second terminal of the fan (900) is connected to the first terminal of resistor R12, the second terminal of resistor R12 is grounded, the collector of transistor Q1 is connected to the first terminal of resistor R12, and the emitter of transistor Q1 is connected to the second terminal of resistor R12.

5. The high-efficiency transmission module for analog optical transmission equipment according to claim 3, characterized in that: The heating circuit (704) includes an inverter U2, a diode D2, a resistor R13, a resistor R14, a resistor R15, and a transistor Q2, wherein the transistor Q2 is an NPN transistor. The input terminal of inverter U2 is connected to the second terminal of resistor R8, the output terminal of inverter U2 is connected to the positive terminal of diode D2, the negative terminal of diode D2 is connected to the first terminal of resistor R13, the second terminal of resistor R13 is connected to the base of transistor Q2, the first terminal of resistor R14 is connected to the second terminal of resistor R13, the second terminal of resistor R14 is grounded, the first terminal of resistor R15 is connected to power supply VCC, the second terminal of resistor R15 is connected to the first terminal of the heating rod (800), the second terminal of the heating rod (800) is connected to the collector of transistor Q2, and the emitter of transistor Q2 is grounded.

6. The high-efficiency transmission module for analog optical transmission equipment according to claim 1, characterized in that: The signal processor (300) receives analog signals via a data line (400), and the laser (500) outputs optical signals via an optical fiber (600).

7. The high-efficiency transmission module for analog optical transmission equipment according to claim 1, characterized in that: The light transmitter (100) has several heat dissipation holes (101) regularly opened on both the left and right side walls. The heating rod (800) and the fan (900) are both installed on the left side wall. The heating rod (800) is located between the fan (900) and the left side wall of the light transmitter (100).

Images