Locomotive fuel pressure real-time monitoring and early warning system

Abstract

The utility model discloses a locomotive fuel pressure real-time monitoring and early warning system, which is characterized by comprising a main control circuit, a double-color lamp panel control circuit and a buzzer alarm circuit, the main control circuit comprises a chip U2, a pin 1 and a pin 3 of the chip U2 are respectively connected with an input end of a slide rheostat W2, and a pin 3 of the slide rheostat W2 is connected with an output end of the slide rheostat W2. One output end of the slide rheostat W2 is connected with the input end of the slide rheostat W1, and one output end of the slide rheostat W1 is connected with a resistor R8 and then is connected with a pin 5 of the chip U2. The utility model relates to the technical field of locomotive fuel pressure real-time monitoring equipment, in particular to a locomotive fuel pressure real-time monitoring and early warning system, which realizes the real-time monitoring and abnormal early warning of locomotive fuel pressure through the cooperative work of a main control circuit, a double-color lamp panel control circuit and a buzzer alarm circuit, and ensures the running safety of a locomotive.

Description

Technical Field

[0001] The utility model relates to the technical field of locomotive fuel pressure real-time monitoring equipment, in particular to a locomotive fuel pressure real-time monitoring and early warning system. Background Art

[0002] Locomotive fuel pressure is one of the key parameters to ensure the normal operation of the locomotive. Traditional fuel pressure monitoring systems may have problems such as insufficient real-time performance, a single warning function, or insufficient stability and safety. These systems may not provide effective warnings in time when the fuel pressure is abnormal, increasing the risk of locomotive failure. Therefore, it is necessary to develop a system that can monitor and warn in real time to improve the safety and reliability of locomotive operation. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a locomotive fuel pressure real-time monitoring and early warning system. Without changing the original vehicle wiring structure, the original fuel pressure gauge is transformed into an intelligent instrument. The instrument has the functions of real-time monitoring of fuel pressure values, setting alarm thresholds, providing sound and light alarm functions, and realizing high-visibility interactive functions. Through the coordinated work of the main control circuit, the two-color light board control circuit and the buzzer alarm circuit, the locomotive fuel pressure is monitored in real time and abnormal early warning is realized to ensure the safety of locomotive operation. The present invention adopts the following technical solutions to achieve the invention purpose:

[0004] A locomotive fuel pressure real-time monitoring and early warning system is characterized in that it includes: a main control circuit, a two-color light board control circuit and a buzzer alarm circuit, the main control circuit includes a chip U2, pins 1 and pin 3 of the chip U2 are respectively connected to the input end of the sliding rheostat W2, an output end of the sliding rheostat W2 is connected to the input end of the sliding rheostat W1, an output end of the sliding rheostat W1 is connected to the resistor R8 and then connected to the pin 5 of the chip U2, an output end of the sliding rheostat W1 is also connected to the input end of the voltage regulator diode DW1, an output end of the sliding rheostat W1 is also connected to the resistor R8 and then connected to the pin 5 of the chip U2, an output end of the sliding rheostat W1 is also connected to the resistor R5 and then grounded, the output end of the voltage regulator diode DW1 is respectively connected to the power supply VCC and pin 1 of the connector P1, the power supply VCC is connected to the capacitor C1 and then grounded, the chip Pin 2 of U2 is connected to resistor R6, and pin 3 of the chip U2 is also connected to capacitor C4. The capacitor C4 is connected to pin 2 of the chip U2 and resistor R6. The resistor R6 is connected in parallel to capacitor C2 and resistor R4 and then connected to pin 4 of chip U1. Pin 4 of the chip U1 is connected to resistor R3 and then to power supply VCC. Pin 5 of the chip U1 is connected to power supply VCC. Pin 4 of the chip U2 is grounded. Pin 5 of the chip U1 is also connected to capacitor C3 and then to ground. Pin 1 of the chip U1 is respectively connected to capacitor C2, resistor R4 and resistor R6. Pin 2 of the chip U1 is grounded. Pin 3 of the chip U1 is connected to capacitor C1 and then to resistor R3. Pin 3 of the chip U1 is also connected to resistor R1 and then to pin 2 of connector P1. Pin 3 of connector P1 is grounded. Pin 2 of the chip U1 is grounded. Connector P1 is connected to the pressure signal of the original fuel pressure gauge.

[0005] The main control circuit is connected to the dual-color light board control circuit and the buzzer alarm circuit.

[0006] As a further limitation of the present technical solution, the dual-color light board control circuit includes a light-emitting diode LED DS3, the power supply VCC is connected in parallel to a resistor R12 and a resistor R14, the resistor R12 is connected to a diode D3, the resistor R14 is connected to an electrode tube D4, the output ends of the diode D3 and the electrode tube D4 are connected to a capacitor C2 and then grounded, the resistor R12 is connected to the light-emitting diode LED DS3, the light-emitting diode LED DS3 is connected to pin 7 of the chip U2, the resistor R14 is connected to the light-emitting diode LED DS1, and the light-emitting diode LED DS1 is connected to pin 1 of the chip U2, pin 6 of the chip U2 is connected to resistor R9, the resistor R9 is connected to capacitor C5, the resistor R9 is also connected to diode D2 and sliding rheostat W3, the input end of the sliding rheostat W3 is connected to the output end of the diode D2, the output end of the diode D2 is connected to resistor R13 and the capacitor C5 and then grounded, the sliding rheostat W3 is also connected to the output end of the optoelectronic isolator U3, pin 1 of the optoelectronic isolator U3 is connected to power supply VCC, pin 2 of the optoelectronic isolator U3 is connected to diode D1, the diode D1 is connected to pin 8 of the chip U2, the Pin 4 of the optoelectronic isolator U3 is respectively connected to the voltage-stabilizing diode DW2 and pin 4 of the rectifier BG. Pin 4 of the rectifier BG is connected to capacitor C6 and then to pin 3. Pin 3 of the rectifier BG is also connected to resistor R11. The resistor R11 is connected to the light-emitting diode DS2. The light-emitting diode DS2 is respectively connected to resistor R10 and the electric voltage-stabilizing diode DW2. The resistor R10 is connected to pin 3 of the optoelectronic isolator U3. Pin 1 of the rectifier BG is connected to pin 2 of plug P6. Pin 2 of the rectifier BG is connected to pin 1 of plug P6. The plug P6 is connected to the rotation signal of the diesel engine.

[0007] As a further limitation of the present technical solution, the buzzer alarm circuit includes an inverter U5, the diode D3 and the electrode tube D4 are both connected to the voltage regulator diode DW3 and then connected to the capacitor C12, the capacitor C12 is grounded, the voltage regulator diode DW3 is also connected to the resistor R7, the resistor R7 is connected to the pin 1 of the transistor Q1, the pin 2 of the transistor Q1 is connected to the pin 1 of the inverter U5 and the resistor R15, the pin 3 of the transistor Q1 is grounded, the resistor R15 is connected to the resistor R16, the pin 2 of the inverter U5 is connected to the pin 3 of the inverter U5, the pin 3 of the inverter U5 is connected to the resistor R16, the resistor R16 is connected to the capacitor C7, the Capacitor C7 is connected to pin 4 of the inverter U5, pin 4 of the inverter U5 is also connected to pin 5 of the inverter U5, capacitor C7 is also connected to pin 13 of the inverter U5, pin 12 of the inverter U5 is connected to pin 6 of the inverter U5, pin 6 of the inverter U5 is also connected to pins 9, 11 and 12 of the inverter U5, pin 10 of the inverter U5 is connected to pin 8 of the inverter U5, pin 9 of the inverter U5 is also connected to resistor R17, resistor R17 is connected to pin 1 of transistor Q2, pin 2 of the transistor Q2 is connected to pin 1 of plug P1, and pin 7 of the inverter U5 is grounded. Pin 14 of the inverter U5 is connected to the input end of the capacitor C11 and pin 1 of the voltage regulator U4, pin 8 of the inverter U5 and pin 10 of the inverter U5 are also connected to resistor 2R2, the resistor 2R2 is connected to pin 1 of the transistor Q3, pin 2 of the transistor Q3 is connected to pin 3 of the connector P2, the connector P2 is connected to the bicolor light board, pin 3 of the transistor Q3 is connected to diode D5 and diode D6, the diode D5 is connected to pin 2 of the transistor Q2, and pin 3 of the transistor Q2 is connected in parallel to the transistor D5, pin 3 of the transistor Q3, diode D6 and capacitor C8, the negative pole of the capacitor C8 is grounded, and the positive pole of the capacitor C8 is grounded. The first terminal of the transistor Q3 is connected to the pin 2 of the plug P1 and the pin 1 of the plug P5, the output end of the diode D6 is connected to the pin 3 of the plug P1 and the pin 2 of the plug P5, the pin 2 of the transistor Q3 is connected to the pin 3 of the plug P2, the output end of the diode D6 and the pin 2 of the plug P5, the pin 1 of the plug P5 is connected to the power supply VCC, the pin 1 of the plug P5 is also connected to the capacitor C9 and the pin 3 of the voltage regulator U4 respectively, the plug P5 is connected to the buzzer, the pin 1 of the voltage regulator U4 is connected in parallel with the capacitor C10 and the capacitor C11, the capacitor C11 and the capacitor C10 are also connected to the capacitor C9 and the pin 2 of the voltage regulator U4, and the pin 2 of the voltage regulator U4 is grounded.

[0008] As a further limitation of the present technical solution, the main control circuit is used to receive and process the locomotive fuel pressure signal and the diesel engine speed signal.

[0009] As a further limitation of the present technical solution, the buzzer alarm circuit and the two-color light board control circuit work synchronously to issue a sound alarm.

[0010] As a further limitation of the present technical solution, the dual-color light board control circuit is used to issue an audible and visual alarm when the fuel pressure is lower than a preset threshold value.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are:

[0012] The system can receive and process locomotive fuel pressure signals and diesel engine speed signals in real time, ensuring the continuity and real-time nature of monitoring;

[0013] When the fuel pressure falls below the preset threshold, the system provides an audible and visual alarm through a dual-color light panel and buzzer, improving the intuitiveness of the warning and the speed of response;

[0014] By using optoelectronic isolators, the system achieves isolation between control signals and monitoring signals, improving the stability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0016] Figure 1 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.

[0019] When a component is referred to as being “located on” or “disposed on” another component, it can be on the other component or there may be an intervening component. When a component is referred to as being “connected to” another component, it can be directly connected to the other component or there may be an intervening component.

[0020] A locomotive fuel pressure real-time monitoring and early warning system is characterized in that it includes: a main control circuit, a two-color light board control circuit and a buzzer alarm circuit, the main control circuit includes a chip U2, pins 1 and pin 3 of the chip U2 are respectively connected to the input end of the sliding rheostat W2, an output end of the sliding rheostat W2 is connected to the input end of the sliding rheostat W1, an output end of the sliding rheostat W1 is connected to the resistor R8 and then connected to the pin 5 of the chip U2, an output end of the sliding rheostat W1 is also connected to the input end of the voltage regulator diode DW1, an output end of the sliding rheostat W1 is also connected to the resistor R8 and then connected to the pin 5 of the chip U2, an output end of the sliding rheostat W1 is also connected to the resistor R5 and then grounded, the output end of the voltage regulator diode DW1 is respectively connected to the power supply VCC and pin 1 of the connector P1, the power supply VCC is connected to the capacitor C1 and then grounded, the chip Pin 2 of U2 is connected to resistor R6, and pin 3 of the chip U2 is also connected to capacitor C4. The capacitor C4 is connected to pin 2 of the chip U2 and resistor R6. The resistor R6 is connected in parallel to capacitor C2 and resistor R4 and then connected to pin 4 of chip U1. Pin 4 of the chip U1 is connected to resistor R3 and then to power supply VCC. Pin 5 of the chip U1 is connected to power supply VCC. Pin 4 of the chip U2 is grounded. Pin 5 of the chip U1 is also connected to capacitor C3 and then to ground. Pin 1 of the chip U1 is respectively connected to capacitor C2, resistor R4 and resistor R6. Pin 2 of the chip U1 is grounded. Pin 3 of the chip U1 is connected to capacitor C1 and then to resistor R3. Pin 3 of the chip U1 is also connected to resistor R1 and then to pin 2 of connector P1. Pin 3 of connector P1 is grounded. Pin 2 of the chip U1 is grounded. Connector P1 is connected to the pressure signal of the original fuel pressure gauge.

[0021] The main control circuit is connected to the dual-color light board control circuit and the buzzer alarm circuit.

[0022] As a further limitation of the present technical solution, the dual-color light board control circuit includes a light-emitting diode LED DS3, the power supply VCC is connected in parallel to a resistor R12 and a resistor R14, the resistor R12 is connected to a diode D3, the resistor R14 is connected to an electrode tube D4, the output ends of the diode D3 and the electrode tube D4 are connected to a capacitor C2 and then grounded, the resistor R12 is connected to the light-emitting diode LED DS3, the light-emitting diode LED DS3 is connected to pin 7 of the chip U2, the resistor R14 is connected to the light-emitting diode LED DS1, and the light-emitting diode LED DS1 is connected to pin 1 of the chip U2, pin 6 of the chip U2 is connected to resistor R9, the resistor R9 is connected to capacitor C5, the resistor R9 is also connected to diode D2 and sliding rheostat W3, the input end of the sliding rheostat W3 is connected to the output end of the diode D2, the output end of the diode D2 is connected to resistor R13 and the capacitor C5 and then grounded, the sliding rheostat W3 is also connected to the output end of the optoelectronic isolator U3, pin 1 of the optoelectronic isolator U3 is connected to the power supply VCC, pin 2 of the optoelectronic isolator U3 is connected to diode D1, the diode D1 is connected to pin 8 of the chip U2, and pin 4 of the optoelectronic isolator U3 is respectively connected to the voltage regulator diode DW2 and the rectifier Pin 4 of the rectifier BG, pin 4 of the rectifier BG is connected to capacitor C6 and then to pin 3, pin 3 of the rectifier BG is also connected to resistor R11, the resistor R11 is connected to light-emitting diode DS2, the light-emitting diode DS2 is respectively connected to resistor R10 and electric voltage regulator diode DW2, the resistor R10 is connected to pin 3 of the optoelectronic isolator U3, pin 1 of the rectifier BG is connected to pin 2 of plug P6, pin 2 of the rectifier BG is connected to pin 1 of plug P6, and the plug P6 is connected to the rotation signal of the diesel engine. In this embodiment, the rotation signal of the diesel engine is an analog electrical signal, and the fuel pressure can only be judged when the diesel engine has a certain speed (normal operation).

[0023] As a further limitation of the present technical solution, the buzzer alarm circuit includes an inverter U5, the diode D3 and the electrode tube D4 are both connected to the voltage regulator diode DW3 and then connected to the capacitor C12, the capacitor C12 is grounded, the voltage regulator diode DW3 is also connected to the resistor R7, the resistor R7 is connected to the pin 1 of the transistor Q1, the pin 2 of the transistor Q1 is connected to the pin 1 of the inverter U5 and the resistor R15, the pin 3 of the transistor Q1 is grounded, the resistor R15 is connected to the resistor R16, the pin 2 of the inverter U5 is connected to the pin 3 of the inverter U5, the pin 3 of the inverter U5 is connected to the resistor R16, the resistor R16 is connected to the capacitor C7, the Capacitor C7 is connected to pin 4 of the inverter U5, pin 4 of the inverter U5 is also connected to pin 5 of the inverter U5, capacitor C7 is also connected to pin 13 of the inverter U5, pin 12 of the inverter U5 is connected to pin 6 of the inverter U5, pin 6 of the inverter U5 is also connected to pins 9, 11 and 12 of the inverter U5, pin 10 of the inverter U5 is connected to pin 8 of the inverter U5, pin 9 of the inverter U5 is also connected to resistor R17, resistor R17 is connected to pin 1 of transistor Q2, pin 2 of the transistor Q2 is connected to pin 1 of plug P1, and pin 7 of the inverter U5 is grounded. Pin 14 of the inverter U5 is connected to the input end of the capacitor C11 and pin 1 of the voltage regulator U4, pin 8 of the inverter U5 and pin 10 of the inverter U5 are also connected to resistor 2R2, the resistor 2R2 is connected to pin 1 of the transistor Q3, pin 2 of the transistor Q3 is connected to pin 3 of the connector P2, the connector P2 is connected to the bicolor light board, pin 3 of the transistor Q3 is connected to diode D5 and diode D6, the diode D5 is connected to pin 2 of the transistor Q2, and pin 3 of the transistor Q2 is connected in parallel to the transistor D5, pin 3 of the transistor Q3, diode D6 and capacitor C8, the negative pole of the capacitor C8 is grounded, and the positive pole of the capacitor C8 is grounded. The first terminal of the transistor Q3 is connected to the pin 2 of the plug P1 and the pin 1 of the plug P5, the output end of the diode D6 is connected to the pin 3 of the plug P1 and the pin 2 of the plug P5, the pin 2 of the transistor Q3 is connected to the pin 3 of the plug P2, the output end of the diode D6 and the pin 2 of the plug P5, the pin 1 of the plug P5 is connected to the power supply VCC, the pin 1 of the plug P5 is also connected to the capacitor C9 and the pin 3 of the voltage regulator U4 respectively, the plug P5 is connected to the buzzer, the pin 1 of the voltage regulator U4 is connected in parallel with the capacitor C10 and the capacitor C11, the capacitor C11 and the capacitor C10 are also connected to the capacitor C9 and the pin 2 of the voltage regulator U4, and the pin 2 of the voltage regulator U4 is grounded.

[0024] In this embodiment, the light emitting diode LED DS3 and the light emitting diode LED DS1 are used to display the current fuel pressure status.

[0025] In this embodiment, the photoelectric isolator U3 is used to isolate the control signal and the monitoring signal to ensure the stability and safety of the system.

[0026] In this embodiment, the power supply VCC is connected to the diodes D3 and D4 via the resistors R12 and R14 to ensure the stability of the circuit.

[0027] In this embodiment, when abnormal fuel pressure is detected, chip U2 controls diode D1 through pin 8, thereby triggering photoelectric isolator U3, activating the buzzer alarm circuit, and controlling the buzzer alarm prompt;

[0028] Inverters U5 to U5 amplify the alarm signal and control the sound of the buzzer through transistors Q1, Q2, and Q3;

[0029] Chip U2, acting as the master control unit, receives input signals from rheostat W2 via pins 1 and 3 for preliminary pressure monitoring. The output of rheostat W1 is connected to resistor R8, which converts the pressure signal into an electrical signal and transmits it to pin 5 of chip U2. Chip U2 is connected to resistor R6 via pin 2, and capacitor C4 via pin 3. Capacitor C4 connects to pin 2 of chip U2 and resistor R6, forming a stable signal input.

[0030] The main control circuit is used to receive and process the locomotive fuel pressure signal and the diesel engine speed signal.

[0031] The buzzer alarm circuit works synchronously with the dual-color light board control circuit to issue a sound alarm.

[0032] The dual-color light board control circuit is used to issue an audible and visual alarm when the fuel pressure is lower than a preset threshold value. The dual-color light board uses red and white lights, which flash alternately to provide a prompt when the fuel pressure is low.

[0033] The working principle is as follows: after the system is powered on, the chip U2 in the main control circuit starts working, initializing the relevant parameters and settings, and the sliding resistors W1 and W2 are set to the initial position to ensure that the system can start monitoring from the preset pressure value at startup;

[0034] The output end of the sliding rheostat W1 is connected to the resistor R8, and the pressure signal is converted into an electrical signal through the resistor R8 and transmitted to the pin 5 of the chip U2. The chip U2 receives the input signal of the sliding rheostat W2 through its pins 1 and 3 to perform preliminary pressure monitoring. The chip U2 processes the received pressure signal internally and converts it into a numerical value suitable for display and comparison. The chip U1 assists in processing the signal to ensure the stability and accuracy of the signal. According to the processed pressure value, the chip U2 controls the light-emitting diode LED DS3 through pin 7 and controls the light-emitting diode LED DS1, the light-emitting diode LED DS3 and the LED DS1 through pin 1. DS1 displays the current fuel pressure status through different brightness or colors. Optoelectronic isolator U3 is used to isolate control signals from monitoring signals to ensure system safety and stability. Diodes D1 and D2, resistors R9, R13 and other components work with optoelectronic isolator U3 to achieve signal isolation and transmission. When abnormal fuel pressure is detected, chip U2 controls diode D1 through pin 8, which in turn triggers optoelectronic isolator U3 and activates the buzzer alarm circuit. Inverter U5 amplifies the alarm signal and controls the sound of the buzzer through transistors Q1, Q2, Q3, etc. Zener diodes DW1, DW2 and DW3 ensure that the system can obtain stable power supply in different operating states. Capacitors C1, C2, C3 and others are used for power supply filtering to reduce power supply noise and ensure stable system operation. The system receives external signals such as driver's operating instructions or data from external monitoring equipment through connectors P1 and P5. The system adjusts monitoring parameters or alarm levels based on these signals to ensure the real-time and accuracy of the system.

[0035] The system realizes real-time monitoring of locomotive fuel pressure and abnormal warning through the coordinated work of the main control circuit, two-color light board control circuit and buzzer alarm circuit, ensuring the safe operation of the locomotive.

[0036] Without changing the original vehicle wiring structure, the utility model transforms the original fuel pressure gauge into an intelligent instrument based on the original fuel pressure gauge, which has the functions of real-time monitoring of fuel pressure value, setting alarm threshold, providing sound and light alarm function, and realizing high-visibility interactive function. Through the coordinated work of the main control circuit, the two-color light board control circuit and the buzzer alarm circuit, the real-time monitoring of the locomotive fuel pressure and abnormal warning are realized to ensure the safe operation of the locomotive.

[0037] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A locomotive fuel pressure real-time monitoring and early warning system, characterized in that: include: The main control circuit, the two-color light board control circuit and the buzzer alarm circuit, the main control circuit includes a chip U2, the pins 1 and pin 3 of the chip U2 are respectively connected to the input end of the sliding rheostat W2, an output end of the sliding rheostat W2 is connected to the input end of the sliding rheostat W1, an output end of the sliding rheostat W1 is connected to the resistor R8 and then connected to the pin 5 of the chip U2, an output end of the sliding rheostat W1 is also connected to the input end of the voltage regulator diode DW1, an output end of the sliding rheostat W1 is also connected to the resistor R8 and then connected to the pin 5 of the chip U2, an output end of the sliding rheostat W1 is also connected to the resistor R5 and then grounded, the output end of the voltage regulator diode DW1 is respectively connected to the power supply VCC and the pin 1 of the connector P1, the power supply VCC is connected to the capacitor C1 and then grounded, the pin 2 of the chip U2 is connected to the resistor R6, Pin 3 of the chip U2 is also connected to capacitor C4, which is connected to pin 2 of the chip U2 and resistor R6. The resistor R6 is connected in parallel to capacitor C2 and resistor R4 and then connected to pin 4 of chip U1. Pin 4 of the chip U1 is connected to resistor R3 and then to power supply VCC. Pin 5 of the chip U1 is connected to power supply VCC. Pin 4 of the chip U2 is grounded. Pin 5 of the chip U1 is also connected to capacitor C3 and then to ground. Pin 1 of the chip U1 is respectively connected to capacitor C2, resistor R4 and resistor R6. Pin 2 of the chip U1 is grounded. Pin 3 of the chip U1 is connected to capacitor C1 and then to resistor R3. Pin 3 of the chip U1 is also connected to resistor R1 and then to pin 2 of connector P1. Pin 3 of connector P1 is grounded. Pin 2 of the chip U1 is grounded. Connector P1 is connected to the pressure signal of the original fuel pressure gauge. The main control circuit is connected to the dual-color light board control circuit and the buzzer alarm circuit.

2. The locomotive fuel pressure real-time monitoring and early warning system according to claim 1 is characterized by: The dual-color light board control circuit includes a light-emitting diode LED DS3, the power supply VCC is connected in parallel to a resistor R12 and a resistor R14, the resistor R12 is connected to a diode D3, the resistor R14 is connected to an electrode tube D4, the output ends of the diode D3 and the electrode tube D4 are connected to a capacitor C2 and then grounded, the resistor R12 is connected to the light-emitting diode LED DS3, the light-emitting diode LED DS3 is connected to pin 7 of the chip U2, the resistor R14 is connected to the light-emitting diode LED DS1, the light-emitting diode LED DS1 is connected to pin 1 of the chip U2, pin 6 of the chip U2 is connected to resistor R9, the resistor R9 is connected to capacitor C5, the resistor R9 is also connected to diode D2 and sliding rheostat W3, the input end of the sliding rheostat W3 is connected to the output end of the diode D2, the output end of the diode D2 is connected to resistor R13 and the capacitor C5 and then grounded, the sliding rheostat W3 is also connected to the output end of the optoelectronic isolator U3, pin 1 of the optoelectronic isolator U3 is connected to power supply VCC, pin 2 of the optoelectronic isolator U3 is connected to diode D1, the diode D1 is connected to pin 8 of the chip U2, the Pin 4 of the optoelectronic isolator U3 is respectively connected to the voltage-stabilizing diode DW2 and pin 4 of the rectifier BG. Pin 4 of the rectifier BG is connected to capacitor C6 and then to pin 3. Pin 3 of the rectifier BG is also connected to resistor R11. The resistor R11 is connected to the light-emitting diode DS2. The light-emitting diode DS2 is respectively connected to resistor R10 and the electric voltage-stabilizing diode DW2. The resistor R10 is connected to pin 3 of the optoelectronic isolator U3. Pin 1 of the rectifier BG is connected to pin 2 of plug P6. Pin 2 of the rectifier BG is connected to pin 1 of plug P6. The plug P6 is connected to the rotation signal of the diesel engine.

3. The locomotive fuel pressure real-time monitoring and early warning system according to claim 2 is characterized by: The buzzer alarm circuit includes an inverter U5, the diode D3 and the electrode tube D4 are both connected to the voltage-stabilizing diode DW3 and then connected to the capacitor C12, the capacitor C12 is grounded, the voltage-stabilizing diode DW3 is also connected to the resistor R7, the resistor R7 is connected to the pin 1 of the transistor Q1, the pin 2 of the transistor Q1 is connected to the pin 1 of the inverter U5 and the resistor R15, the pin 3 of the transistor Q1 is grounded, the resistor R15 is connected to the resistor R16, the pin 2 of the inverter U5 is connected to the pin 3 of the inverter U5, the pin 3 of the inverter U5 is connected to the resistor R16, the resistor R16 is connected to the capacitor C7, the capacitor C7 and the inverter U 5 is connected to pin 4 of the inverter U5, pin 4 of the inverter U5 is also connected to pin 5 of the inverter U5, the capacitor C7 is also connected to pin 13 of the inverter U5, pin 12 of the inverter U5 is connected to pin 6 of the inverter U5, pin 6 of the inverter U5 is also connected to pin 9, pin 11 and pin 12 of the inverter U5, pin 10 of the inverter U5 is connected to pin 8 of the inverter U5, pin 9 of the inverter U5 is also connected to resistor R17, the resistor R17 is connected to pin 1 of the transistor Q2, pin 2 of the transistor Q2 is connected to pin 1 of plug P1, pin 7 of the inverter U5 is grounded, and the inverter U5 Pin 14 is connected to the input end of capacitor C11 and pin 1 of voltage regulator U4, pin 8 of inverter U5 and pin 10 of inverter U5 are also connected to resistor 2R2, the resistor 2R2 is connected to pin 1 of transistor Q3, pin 2 of transistor Q3 is connected to pin 3 of connector P2, connector P2 is connected to the bicolor light board, pin 3 of transistor Q3 is connected to diode D5 and diode D6, the diode D5 is connected to pin 2 of transistor Q2, pin 3 of transistor Q2 is connected in parallel to the transistor D5, pin 3 of transistor Q3, diode D6 and capacitor C8, the negative electrode of capacitor C8 is grounded, and the positive electrode of capacitor C8 is connected Pin 2 of the plug P1 and pin 1 of the plug P5, the output end of the diode D6 is connected to pin 3 of the plug P1 and pin 2 of the plug P5, pin 2 of the transistor Q3 is connected to pin 3 of the plug P2, the output end of the diode D6 and pin 2 of the plug P5, pin 1 of the plug P5 is connected to the power supply VCC, pin 1 of the plug P5 is also connected to capacitor C9 and pin 3 of the voltage regulator U4 respectively, the plug P5 is connected to the buzzer, pin 1 of the voltage regulator U4 is connected in parallel with capacitor C10 and capacitor C11, the capacitor C11 and capacitor C10 are also connected to capacitor C9 and pin 2 of the voltage regulator U4, and pin 2 of the voltage regulator U4 is grounded.

4. The locomotive fuel pressure real-time monitoring and early warning system according to claim 3 is characterized by: The main control circuit is used to receive and process the locomotive fuel pressure signal and the diesel engine speed signal.

5. The locomotive fuel pressure real-time monitoring and early warning system according to claim 3 is characterized by: The buzzer alarm circuit works synchronously with the dual-color light board control circuit to issue a sound alarm.

6. The locomotive fuel pressure real-time monitoring and early warning system according to claim 3 is characterized by: The dual-color light board control circuit is used to issue an audible and visual alarm when the fuel pressure is lower than a preset threshold value.

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