Two-bus to optical fiber conversion system

Abstract

The utility model provides a two-bus to optical fiber conversion system, and belongs to the technical field of signal conversion. The two-bus to optical fiber conversion system comprises a two-bus module, a signal conditioning module, a signal transmission module and an optical fiber module, the two-bus module is connected with the input end of the signal conditioning module, the two-bus module is configured to receive sensor signals, the output end of the signal conditioning module is connected with the input end of the signal transmission module, and the output end of the signal transmission module is connected with the optical fiber module and is configured to convert electric signals into optical signals. According to the invention, the accuracy and reliability of data transmission can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of signal conversion, and in particular to a two-bus to optical fiber system. Background Art

[0002] In today's era of rapid technological advancement, various sensors are widely used in numerous fields, such as industrial automation control, security monitoring in large venues, and intelligent building management. The data collected by sensors plays a vital role in system monitoring, decision-making, and regulation.

[0003] In traditional signal transmission systems, electrical signals output by sensors are often transmitted using conventional wired transmission methods. However, as application scenarios continue to expand and become more complex, this traditional transmission method has exposed many limitations. For example, in some large venues, sensors are extremely dispersed and located far from monitoring centers or data processing units. Electrical signals are susceptible to electromagnetic interference during long-distance transmission, resulting in severe signal distortion and attenuation, which in turn affects the accuracy and reliability of data. Utility Model Content

[0004] The embodiments of the present disclosure provide a two-bus to fiber optic system to improve the accuracy and reliability of data transmission.

[0005] The embodiment of the present disclosure provides a two-bus to fiber optic system, comprising: a two-bus module, a signal conditioning module, a signal transmission module, and a fiber optic module;

[0006] The second bus module is connected to the input end of the signal conditioning module, the second bus module is configured to receive sensor signals, the output end of the signal conditioning module is connected to the input end of the signal transmission module, the output end of the signal transmission module is connected to the optical fiber module, and the optical fiber module is configured to convert electrical signals into optical signals;

[0007] The signal transmission module includes: a diode D2, a resistor R14, a resistor R19 and an operational amplifier U2A;

[0008] The anode of the diode D2 is connected to the output end of the signal conditioning module, the anode of the diode D2 is connected to the non-inverting input end of the operational amplifier U2A through the resistor R14, the cathode of the diode D2 is connected to the inverting input end of the operational amplifier U2A through the resistor R19, and the output end of the operational amplifier U2A is connected to the optical fiber module.

[0009] In an exemplary embodiment of the present disclosure, the signal transmission module further includes: a resistor R25, a resistor R26, a resistor R20 and a transistor Q5;

[0010] The output end of the operational amplifier U2A is connected to the base of the transistor Q5 through the resistor R25, and the base of the transistor Q5 is grounded through the resistor R26. The inverting input end of the operational amplifier U2A is connected to the collector of the transistor Q5 through the resistor R20, and the emitter of the transistor Q5 is grounded.

[0011] In an exemplary embodiment of the present disclosure, a power supply module is further included;

[0012] The power supply module is connected to the signal transmission module;

[0013] The power supply module includes: a resistor R4, a capacitor C16, a voltage regulator tube DZ1, a transistor Q1 and a capacitor C5;

[0014] The first end of the resistor R4 is connected to the cathode of the diode D2, the second end of the resistor R4 is grounded through the capacitor C16, the second end of the resistor R4 is connected to the cathode of the voltage regulator DZ1, the anode of the voltage regulator DZ1 is grounded, the cathode of the voltage regulator DZ1 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the first end of the resistor R4, the emitter of the transistor Q1 is grounded through the capacitor C5, and the emitter of the transistor Q1 is used to output the first power supply.

[0015] In an exemplary embodiment of the present disclosure, the power module further includes: a resistor R2, a resistor R6, a first power chip U1, a capacitor C1, a diode D1, an inductor L1, a resistor R5, a resistor R1 and a capacitor C2;

[0016] The first end of the resistor R2 and the input end of the power chip U1 are both connected to the cathode of the diode D2, the second end of the resistor R2 is grounded through the resistor R6, the second end of the resistor R2 is connected to the enable end of the power chip U1, the output end of the power chip U1 is connected to the cathode of the diode D1 through the capacitor C1, the anode of the diode D1 is grounded, the cathode of the diode D1 is connected to the first end of the inductor L1, the second end of the inductor L1 is grounded through the capacitor C2, the second end of the inductor L1 is connected to the feedback end of the power chip U1 through the resistor R1, the feedback end of the power chip U1 is grounded through the resistor R5, and the second end of the inductor L1 is used to output a second power supply.

[0017] In an exemplary embodiment of the present disclosure, the power module further includes: a second power chip U4;

[0018] An input end of the second power chip U4 is connected to the second end of the inductor L1 , and an output end of the second power chip U4 is used to output a third power supply.

[0019] In an exemplary embodiment of the present disclosure, it further includes: a response module; the input end of the response module is connected to the optical fiber module, and the output end of the response module is connected to the output end of the signal conditioning module;

[0020] The response module includes: a resistor R17, a resistor R22, a transistor Q4, a resistor R3, a transistor Q2 and a resistor R8;

[0021] The first end of the resistor R17 is connected to the optical fiber module, the second end of the resistor R17 is connected to the base of the transistor Q4, the collector of the transistor Q4 is used to connect to the third power supply, the base of the transistor Q4 is connected to the emitter of the transistor Q4 through the resistor R22, the emitter of the transistor Q4 is connected to the base of the transistor Q2 through the resistor R3, the collector of the transistor Q2 is connected to the output end of the signal conditioning module, and the emitter of the transistor Q2 is grounded through the resistor R8.

[0022] In an exemplary embodiment of the present disclosure, an indicator light module is further included;

[0023] The indicator light module includes: a resistor R32, a resistor R33, a transistor Q6, a light emitting diode LED1, a light emitting diode LED4, a resistor R18, a transistor Q3, a light emitting diode LED2 and a light emitting diode LED3;

[0024] A first end of the resistor R32 is connected to the optical fiber module, a second end of the resistor R32 is connected to a third power supply via the resistor R33, a second end of the resistor R32 is connected to the base of the transistor Q6, an emitter of the transistor Q6 is connected to the third power supply, the emitter of the transistor Q6 is grounded via the light-emitting diode LED1, and the collector of the transistor Q6 is grounded via the light-emitting diode LED4;

[0025] The base of the transistor Q3 is connected to the output end of the operational amplifier U2A, the base of the transistor Q3 is connected to the emitter of the transistor Q3 through the resistor R18, the collector of the transistor Q3 is connected to a third power supply, the emitter of the transistor Q3 is grounded through the light-emitting diode LED3, and the emitter of the transistor Q4 is grounded through the light-emitting diode LED2.

[0026] The beneficial effects of a two-bus to fiber optic system provided by the embodiment of the present disclosure are as follows: the embodiment of the present disclosure realizes efficient reception, conditioning, transmission and optical signal conversion of sensor signals by integrating a two-bus module, a signal conditioning module, a signal transmission module and an optical fiber module. The embodiment of the present disclosure utilizes a signal transmission module composed of a diode D2, resistors R14, R19 and an operational amplifier U2A to effectively realize accurate comparison and transmission of electrical signals, ensuring signal stability and accuracy. The introduction of the optical fiber module converts electrical signals into optical signals, greatly improving the transmission distance and anti-interference ability of the signal, meeting the needs of long-distance, high-quality signal transmission in large-scale venue monitoring systems, and providing reliable guarantees for subsequent signal processing and analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 is a circuit diagram of a two-bus to fiber optic system provided by an embodiment of the present disclosure;

[0029] Figure 2 is a circuit diagram of a signal transmission module provided by an embodiment of the present disclosure;

[0030] Figure 3 is a circuit diagram of a third power supply provided by an embodiment of the present disclosure;

[0031] Figure 4 is a circuit diagram of an optical fiber interface of an optical fiber module provided in an embodiment of the present disclosure;

[0032] Figure 5 4 is a circuit diagram of an indicator light module provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] To help those skilled in the art better understand this solution, the following will clearly describe the technical solutions in the embodiments of this solution in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of this solution, not all of it. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of this solution.

[0034] Throughout the specification, claims, and accompanying figures of this solution, the term "including" and any variations thereof mean "including, but not limited to," and are intended to cover non-exclusive inclusions and are not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish between different objects, not to describe a specific order.

[0035] The following describes the implementation of the present disclosure in detail with reference to the accompanying drawings:

[0036] Figure 1 This is a schematic diagram of the structure of a two-bus to fiber optic system provided by an embodiment of the present disclosure. Figure 2 is a circuit diagram of a signal transmission module provided by an embodiment of the present disclosure, Figure 4 This is a circuit diagram of the optical fiber interface of the optical fiber module provided by the embodiment of the present disclosure. Figure 1-2 4. A two-bus to fiber optic system includes: a two-bus module, a signal conditioning module, a signal transmission module and a fiber optic module; the two-bus module is connected to the input end of the signal conditioning module, the two-bus module is configured to receive sensor signals, the output end of the signal conditioning module is connected to the input end of the signal transmission module, the output end of the signal transmission module is connected to the fiber optic module, and the fiber optic module is configured to convert electrical signals into optical signals; the signal transmission module includes: a diode D2, a resistor R14, a resistor R19 and an operational amplifier U2A; the anode of the diode D2 is connected to the output end of the signal conditioning module, the anode of the diode D2 is connected to the non-inverting input end of the operational amplifier U2A through the resistor R14, the cathode of the diode D2 is connected to the inverting input end of the operational amplifier U2A through the resistor R19, and the output end of the operational amplifier U2A is connected to the fiber optic module.

[0037] In this embodiment, the basic working process is: first, the second bus module receives the electrical signal output by the external sensor, then transmits the received electrical signal to the signal conditioning module for corresponding processing, and the processed signal enters the signal transmission module for further adjustment, and finally the optical fiber module converts the electrical signal into an optical signal to realize long-distance transmission communication.

[0038] The second-bus module receives electrical signals from external sensors and communicates them via carrier waves. The second-bus module serves as the initial input point for the entire system, providing raw sensor signals to subsequent modules. For example, electrical signals from external devices like smoke sensors and temperature sensors can be received through the second-bus module, initiating subsequent signal conversion and transmission.

[0039] like Figure 1As shown, the signal conditioning module can be composed of a fuse F1, a capacitor C4, a capacitor C7 and a rectifier bridge DB1. The first interface of the two-bus module is connected to the first end of the fuse F1, the second end of the fuse F1 is grounded through the capacitor C4, the second end of the fuse F1 is connected to the first input end of the rectifier bridge DB1, the second interface of the two-bus module is grounded through the capacitor C7, the second interface of the two-bus module is connected to the second end of the rectifier bridge DB1, the first output end of the rectifier bridge DB1 serves as the output end of the signal conditioning module, and the first output end of the rectifier bridge DB1 is grounded.

[0040] Capacitors C4 and C7 act as filters, removing any potential interference and ensuring a smoother signal. Fuse F1 protects the entire circuit from damage caused by excessive current, such as abnormal overcurrent. Rectifier bridge DB1 rectifies the electrical signals received by the bus module, ultimately converting them into pulse signals.

[0041] Op amp U2A forms a comparator. When the pulse signal is high, the high-level signal output by the first output terminal of the rectifier bridge DB1 is added to the non-inverting input terminal of op amp U2A. Due to the presence of diode D2 and the current limiting function of the resistor, the voltage at the non-inverting input terminal of op amp U2A is greater than the voltage at the inverting input terminal of op amp U2A. According to the working principle of the op amp, op amp U2A will output a high level to the optical fiber module, completing this stage of signal transmission and processing. Conversely, when the pulse signal is low, op amp U2A outputs a low level.

[0042] The optical fiber module is used to receive the high-level electrical signal output from the operational amplifier U2A and convert it into an optical signal for transmission, thereby meeting the needs of long-distance transmission communication. When the operational amplifier U2A outputs a low level, the optical fiber module no longer outputs an optical signal.

[0043] For example, in the monitoring systems of some large venues, sensors are relatively dispersed and far away from the monitoring center. By converting electrical signals into optical signals and taking advantage of the low loss and strong anti-interference capabilities of optical fibers, the signals can be accurately transmitted to the distant receiving end for subsequent processing and analysis.

[0044] From the above, it can be concluded that this embodiment achieves efficient reception, conditioning, transmission, and optical signal conversion of sensor signals by integrating a two-bus module, a signal conditioning module, a signal transmission module, and an optical fiber module. This embodiment utilizes a signal transmission module composed of diode D2, resistors R14 and R19, and op amp U2A to effectively achieve accurate comparison and transmission of electrical signals, ensuring signal stability and accuracy. The introduction of the optical fiber module converts electrical signals into optical signals, greatly improving the signal transmission distance and anti-interference ability, meeting the needs of long-distance, high-quality signal transmission in large-scale venue monitoring systems, and providing reliable protection for subsequent signal processing and analysis.

[0045] like Figure 2 As shown, in one embodiment of the present disclosure, the signal transmission module further includes: a resistor R25, a resistor R26, a resistor R20 and a transistor Q5; the output end of the operational amplifier U2A is connected to the base of the transistor Q5 through the resistor R25, the base of the transistor Q5 is grounded through the resistor R26, the inverting input end of the operational amplifier U2A is connected to the collector of the transistor Q5 through the resistor R20, and the emitter of the transistor Q5 is grounded.

[0046] In this embodiment, resistors R25, R26, R20, and transistor Q5 form a hysteresis circuit. When op amp U2A outputs a high level, transistor Q5 is turned on via resistor R25, causing the collector potential of transistor Q5 to decrease. This potential is fed back to the inverting input of op amp U2A via resistor R20, further stabilizing the high-level output of op amp U2A. When the input signal changes and causes the output of op amp U2A to decrease, transistor Q5 remains on, and the potential of the inverting input is low, hindering rapid changes in the output of op amp U2A until the input signal changes sufficiently to cause the output of op amp U2A to reverse.

[0047] From the above, it can be concluded that the hysteresis circuit in this embodiment can effectively prevent the frequent switching of the output of the op amp U2A due to slight fluctuations in the input signal, thereby enhancing the stability and anti-interference performance of the system and ensuring the accuracy and reliability of signal transmission. Especially in a complex and changeable signal environment, it can enable the system to maintain stable operation and reduce misoperation and erroneous signal transmission.

[0048] like Figure 1As shown, in one embodiment of the present disclosure, a power supply module is also included; the power supply module is connected to the signal transmission module; the power supply module includes: a resistor R4, a capacitor C16, a voltage regulator DZ1, a transistor Q1 and a capacitor C5; the first end of the resistor R4 is connected to the cathode of the diode D2, the second end of the resistor R4 is grounded through the capacitor C16, the second end of the resistor R4 is connected to the cathode of the voltage regulator DZ1, the anode of the voltage regulator DZ1 is grounded, the cathode of the voltage regulator DZ1 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the first end of the resistor R4, the emitter of the transistor Q1 is grounded through the capacitor C5, and the emitter of the transistor Q1 is used to output the first power supply.

[0049] In this embodiment, the voltage introduced from the cathode of diode D2 passes through resistor R4 and is filtered by capacitor C16, providing a relatively stable voltage input for subsequent circuits. Zener diode DZ1 utilizes its voltage-stabilizing properties to stabilize the voltage at a specific value, which is then applied to the base of transistor Q1. Transistor Q1 forms an emitter-follower circuit, featuring high input impedance and low output impedance. It buffers and isolates the stabilized voltage, and its emitter outputs a first power supply, which in this embodiment can be 33V. This first power supply provides the operating voltage for op amp U2A.

[0050] like Figure 1 As shown, in one embodiment of the present disclosure, the power supply module also includes: a resistor R2, a resistor R6, a first power supply chip U1, a capacitor C1, a diode D1, an inductor L1, a resistor R5, a resistor R1 and a capacitor C2; the first end of the resistor R2 and the input end of the power supply chip U1 are both connected to the cathode of the diode D2, the second end of the resistor R2 is grounded through the resistor R6, the second end of the resistor R2 is connected to the enable end of the power supply chip U1, the output end of the power supply chip U1 is connected to the cathode of the diode D1 through the capacitor C1, the anode of the diode D1 is grounded, the cathode of the diode D1 is connected to the first end of the inductor L1, the second end of the inductor L1 is grounded through the capacitor C2, the second end of the inductor L1 is connected to the feedback end of the power supply chip U1 through the resistor R1, the feedback end of the power supply chip U1 is grounded through the resistor R5, and the second end of the inductor L1 is used to output the second power supply.

[0051] In this embodiment, LGS5145 can be used as the power chip U1. The voltage input from the cathode of diode D2 is divided by resistors R2 and R6 to provide a startup signal for the enable terminal of power chip U1. When power chip U1 is in operation, its input terminal receives voltage and performs voltage conversion and other processing inside the chip. The voltage output from the output terminal is filtered by capacitor C1 and then passes through the energy storage and freewheeling circuit composed of diode D1 and inductor L1. Inductor L1 stores energy and releases energy when the switch is turned off to maintain a stable output voltage. Resistors R1 and R5 form a feedback network that feeds the voltage at the output terminal of inductor L1 back to the feedback terminal of power chip U1, so that the chip can adjust the output based on the feedback, thereby obtaining a stable second power supply at the second terminal of inductor L1. The second power supply can be 5V.

[0052] like Figure 3 As shown, in one embodiment of the present disclosure, the power module further includes: a second power chip U4; the input end of the second power chip U4 is connected to the second end of the inductor L1, and the output end of the second power chip U4 is used to output a third power supply.

[0053] In this embodiment, AMS1117 can be used as the power chip U4. The power chip U4 is used to convert 5V voltage to 3.3V, thereby meeting the power supply requirements of the corresponding working modules.

[0054] like Figure 1 and Figure 4 As shown, in one embodiment of the present disclosure, it also includes: a response module; the input end of the response module is connected to the optical fiber module, and the output end of the response module is connected to the output end of the signal conditioning module; the response module includes: a resistor R17, a resistor R22, a transistor Q4, a resistor R3, a transistor Q2 and a resistor R8; a first end of the resistor R17 is connected to the optical fiber module, a second end of the resistor R17 is connected to the base of the transistor Q4, a collector of the transistor Q4 is used to connect to a third power supply, the base of the transistor Q4 is connected to the emitter of the transistor Q4 through the resistor R22, the emitter of the transistor Q4 is connected to the base of the transistor Q2 through the resistor R3, the collector of the transistor Q2 is connected to the output end of the signal conditioning module, and the emitter of the transistor Q2 is grounded through the resistor R8.

[0055] In this embodiment, when the optical fiber module receives the high level signal output by the operational amplifier U2A, a response signal is generated and outputted by the RD pin of the optical fiber module (ie, the second RD pin of the optical fiber interface U3).

[0056] The response signal is applied to the base of transistor Q4 via resistor R17. This turns on transistor Q4, raising the emitter potential, which in turn drives transistor Q2 through resistor R3. At this point, conduction occurs between the collector and emitter of transistor Q2, creating a path between the output of the signal conditioning module and ground, thereby influencing or controlling the output signal of the signal conditioning module. Resistor R22 stabilizes the operating state of transistor Q4 and limits the rate of change of the base current. Resistor R8 provides a suitable emitter-to-ground resistance for transistor Q2, determining its operating current range. Through the switching of transistors Q4 and Q2, the entire response module provides feedback or regulates the output of the signal conditioning module based on the input signal from the fiber optic module.

[0057] like Figure 4 and Figure 5 As shown, in one embodiment of the present disclosure, an indicator light module is also included; the indicator light module includes: a resistor R32, a resistor R33, a transistor Q6, a light-emitting diode LED1, a light-emitting diode LED4, a resistor R18, a transistor Q3, a light-emitting diode LED2 and a light-emitting diode LED3; a first end of the resistor R32 is connected to the optical fiber module, a second end of the resistor R32 is connected to the third power supply through the resistor R33, a second end of the resistor R32 is connected to the base of the transistor Q6, the emitter of the transistor Q6 is connected to the third power supply, the emitter of the transistor Q6 is grounded through the light-emitting diode LED1, and the collector of the transistor Q6 is grounded through the light-emitting diode LED4; the base of the transistor Q3 is connected to the output end of the operational amplifier U2A, the base of the transistor Q3 is connected to the emitter of the transistor Q3 through the resistor R18, the collector of the transistor Q3 is connected to the third power supply, the emitter of the transistor Q3 is grounded through the light-emitting diode LED3, and the emitter of the transistor Q4 is grounded through the light-emitting diode LED2.

[0058] In this embodiment, when the operational amplifier U2A outputs a high-level signal, the transistor Q3 is turned on, and the light-emitting diode LED3 is illuminated, indicating that the optical fiber module has received the electrical signal output by the operational amplifier U2A; when the optical fiber module receives the high-level signal output by the operational amplifier U2A, a response signal is generated at the same time and output by the RD pin of the optical fiber module (that is, the second RD pin of the optical fiber interface U3), the transistor Q4 is turned on, and the light-emitting diode LED2 is illuminated, indicating that the optical fiber module has successfully converted the electrical signal into an optical signal.

[0059] LED1 and LED4 are operating status indicators. When the fiber optic module is operating normally, the module's SD pin (pin 4 of the fiber optic interface) outputs a high level, transistor Q6 turns off, and LED1 illuminates, indicating normal module operation. If the fiber optic module experiences signal loss or a fault, the module's SD pin (pin 4 of the fiber optic interface) outputs a low level, transistor Q6 turns on, and LED4 illuminates, indicating a module fault.

[0060] As can be seen from the above, this embodiment intuitively displays the status of key system links by turning different LEDs on and off. For example, when op amp U2A outputs a high level, LED3 illuminates, clearly indicating whether the fiber optic module has received the electrical signal; LED2 illuminates after the fiber optic module successfully converts the signal, facilitating confirmation of the conversion. LED1 and LED4 serve as operating status indicators. Depending on the level of the fiber optic module's SD pin, LED1 illuminates to indicate normal operation, while LED4 illuminates to indicate a fault. This allows staff to quickly determine the fiber optic module's operating status, improving overall system observability and troubleshooting efficiency, ensuring stable and efficient system operation.

[0061] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A two-bus to fiber optic system, characterized in that: include: Two-bus module, signal conditioning module, signal transmission module and optical fiber module; The second bus module is connected to the input end of the signal conditioning module, the second bus module is configured to receive sensor signals, the output end of the signal conditioning module is connected to the input end of the signal transmission module, the output end of the signal transmission module is connected to the optical fiber module, and the optical fiber module is configured to convert electrical signals into optical signals; The signal transmission module includes: a diode D2, a resistor R14, a resistor R19 and an operational amplifier U2A; The anode of the diode D2 is connected to the output end of the signal conditioning module, the anode of the diode D2 is connected to the non-inverting input end of the operational amplifier U2A through the resistor R14, the cathode of the diode D2 is connected to the inverting input end of the operational amplifier U2A through the resistor R19, and the output end of the operational amplifier U2A is connected to the optical fiber module.

2. A two-bus to fiber optic system according to claim 1, characterized in that: The signal transmission module further includes: a resistor R25, a resistor R26, a resistor R20 and a transistor Q5; The output end of the operational amplifier U2A is connected to the base of the transistor Q5 through the resistor R25, and the base of the transistor Q5 is grounded through the resistor R26. The inverting input end of the operational amplifier U2A is connected to the collector of the transistor Q5 through the resistor R20, and the emitter of the transistor Q5 is grounded.

3. A two-bus to fiber optic system as claimed in claim 2, characterized in that: Also includes a power module; The power supply module is connected to the signal transmission module; The power supply module includes: a resistor R4, a capacitor C16, a voltage regulator tube DZ1, a transistor Q1 and a capacitor C5; The first end of the resistor R4 is connected to the cathode of the diode D2, the second end of the resistor R4 is grounded through the capacitor C16, the second end of the resistor R4 is connected to the cathode of the voltage regulator DZ1, the anode of the voltage regulator DZ1 is grounded, the cathode of the voltage regulator DZ1 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the first end of the resistor R4, the emitter of the transistor Q1 is grounded through the capacitor C5, and the emitter of the transistor Q1 is used to output the first power supply.

4. A two-bus to fiber optic system as claimed in claim 3, characterized in that: The power module further includes: a resistor R2, a resistor R6, a first power chip U1, a capacitor C1, a diode D1, an inductor L1, a resistor R5, a resistor R1 and a capacitor C2; The first end of the resistor R2 and the input end of the power chip U1 are both connected to the cathode of the diode D2, the second end of the resistor R2 is grounded through the resistor R6, the second end of the resistor R2 is connected to the enable end of the power chip U1, the output end of the power chip U1 is connected to the cathode of the diode D1 through the capacitor C1, the anode of the diode D1 is grounded, the cathode of the diode D1 is connected to the first end of the inductor L1, the second end of the inductor L1 is grounded through the capacitor C2, the second end of the inductor L1 is connected to the feedback end of the power chip U1 through the resistor R1, the feedback end of the power chip U1 is grounded through the resistor R5, and the second end of the inductor L1 is used to output a second power supply.

5. A two-bus to fiber optic system as claimed in claim 4, characterized in that: The power module further includes: a second power chip U4; An input end of the second power chip U4 is connected to the second end of the inductor L1 , and an output end of the second power chip U4 is used to output a third power supply.

6. The dual bus to fiber optic system according to claim 1, wherein: Also includes: Response module; The input end of the response module is connected to the optical fiber module, and the output end of the response module is connected to the output end of the signal conditioning module; The response module includes: a resistor R17, a resistor R22, a transistor Q4, a resistor R3, a transistor Q2 and a resistor R8; The first end of the resistor R17 is connected to the optical fiber module, the second end of the resistor R17 is connected to the base of the transistor Q4, the collector of the transistor Q4 is used to connect to the third power supply, the base of the transistor Q4 is connected to the emitter of the transistor Q4 through the resistor R22, the emitter of the transistor Q4 is connected to the base of the transistor Q2 through the resistor R3, the collector of the transistor Q2 is connected to the output end of the signal conditioning module, and the emitter of the transistor Q2 is grounded through the resistor R8.

7. A two-bus to fiber optic system according to claim 6, characterized in that: Also includes an indicator light module; The indicator light module includes: a resistor R32, a resistor R33, a transistor Q6, a light emitting diode LED1, a light emitting diode LED4, a resistor R18, a transistor Q3, a light emitting diode LED2 and a light emitting diode LED3; A first end of the resistor R32 is connected to the optical fiber module, a second end of the resistor R32 is connected to a third power supply via the resistor R33, a second end of the resistor R32 is connected to the base of the transistor Q6, an emitter of the transistor Q6 is connected to the third power supply, the emitter of the transistor Q6 is grounded via the light-emitting diode LED1, and the collector of the transistor Q6 is grounded via the light-emitting diode LED4; The base of the transistor Q3 is connected to the output end of the operational amplifier U2A, the base of the transistor Q3 is connected to the emitter of the transistor Q3 through the resistor R18, the collector of the transistor Q3 is connected to a third power supply, the emitter of the transistor Q3 is grounded through the light-emitting diode LED3, and the emitter of the transistor Q4 is grounded through the light-emitting diode LED2.

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