Single-chip microcomputer-based control system for diesel burner of external combustion type thermoacoustic generator

Abstract

The present invention relates to a single-chip microcomputer-based control system for a diesel burner of an external combustion type thermoacoustic generator, comprising a transformer module, a single-chip microcomputer, an operational amplifier module and a relay module. According to the present invention, a linear switching strategy is designed under the control of the single-chip microcomputer, and the parameter switching between gears is gradual and linear, so that the stability of flame is ensured. According to the control system of the present invention, a flame detection device is designed; and when the flame is detected to be extinguished, a protection program is immediately started, an oil pump is closed, an air blower is started for air purging to blow out residual atomized fuel oil in the burner, thereby ensuring the safety of the next ignition, and preventing deflagration. The control system of the present invention does not need to independently and manually operate the start and stop of air and oil, thereby improving the automatic control level of the burner.

Description

A single-chip microcomputer-based control system for an external combustion thermoacoustic generator diesel burner

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 21, 2023, with application number 202311776039.8 and invention name “A control system for an external-combustion thermoacoustic generator diesel burner based on a single-chip microcomputer”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The invention belongs to the technical field of thermoacoustic generator design, and relates to a single-chip microcomputer-based external combustion type thermoacoustic generator diesel burner control system. Background Art

[0003] External combustion thermoacoustic generators utilize external heat to generate power, driving a piston, which in turn drives a rotor to generate electricity. Because external combustion engines avoid the explosive detonation issues of traditional internal combustion engines, they achieve high efficiency, low noise, low pollution, and low operating costs. The hot end of an external combustion engine burns diesel fuel, heating it to 700°C, enabling the device to generate power.

[0004] However, the hot end of an external combustion thermoacoustic generator requires a stable heat source, and during the startup process, it is necessary to cooperate with the excitation of the external combustion thermoacoustic generator to complete the start-up process and thus generate electricity. The diesel burner can quickly provide the heat required by the hot end of the external combustion engine through diesel combustion. During the startup process, it is necessary to realize the automatic ignition function to ignite the burner to provide heat for the hot end of the generator. At the same time, the rise in the temperature of the hot end needs to cooperate with the excitation process of the generator. If the temperature of the hot end rises too slowly, the start-up will not be possible; if the temperature of the hot end rises too quickly, a cylinder collision phenomenon will occur and damage the generator. Therefore, it is necessary to develop an automatic ignition and flame temperature control system for the diesel burner to cooperate with the generator to realize the power generation function.

[0005] Summary of the Invention

[0006] The technical problem solved by the present invention is to overcome the deficiencies of the prior art and propose a single chip microcomputer-based external combustion type thermoacoustic generator diesel burner control system.

[0007] The solution of the present invention is:

[0008] A single-chip microcomputer-based external combustion thermoacoustic generator diesel burner control system, comprising a transformer module, a single-chip microcomputer, an operational amplifier module, and a relay module;

[0009] Transformer module: converts the external input 24V DC voltage into 5V DC voltage to power the microcontroller and relay module;

[0010] Relay module: After receiving the start control signal from the single chip microcomputer, it starts the burner's blower, ignition gun, and oil pump in sequence; after receiving the stop control signal from the single chip microcomputer, it disconnects the power supply circuit of the oil pump and blower;

[0011] The single-chip microcomputer: After receiving the start signal, it sends a start control signal to the relay module. During the startup process, it generates a blower voltage control signal and an oil pump voltage control signal and sends them to the operational amplifier module. After receiving the stop signal, it sends a stop control signal to the relay module. During the startup process, the blower voltage control signal and the oil pump voltage control signal ensure that the air-oil ratio of the burner increases linearly during the startup process, causing the hot end temperature of the burner to gradually rise until it reaches the start-up state of the generator.

[0012] Operational amplifier module: contains two operational amplifier units, one of which amplifies the blower voltage control signal and sends it to the blower, and the other amplifies the oil pump voltage control signal and sends it to the oil pump.

[0013] Preferably, during operation, the single-chip microcomputer generates a blower voltage control signal and an oil pump voltage control signal to enable the burner to operate under the set air volume and oil pump load, thereby ensuring stable operation of the generator; when the load needs to be switched, the single-chip microcomputer adjusts the blower voltage control signal and the oil pump voltage control signal to make the burner's air volume and oil pump load linearly transition to the load to be switched.

[0014] Preferably, the blower is provided with a blow-off gear and an operating gear. The single chip microcomputer sends a start control signal to the relay module. After the relay module receives the start control signal from the single chip microcomputer, it starts the blower, ignition gun and oil pump of the burner in sequence. The process is as follows:

[0015] The single chip computer sends a blower blow-off gear on signal to the relay module, and the relay module adjusts the blower to the blow-off gear;

[0016] After the predetermined blowing time is reached, the single chip computer sends a blower operation gear on signal to the relay module, and the relay module adjusts the blower to the operation gear;

[0017] The single chip computer sends an ignition gun start control signal to the relay module, and the relay module connects the ignition gun power supply circuit;

[0018] After the ignition gun works for a predetermined time, the single chip computer sends an ignition gun stop control signal to the relay module, and the relay module disconnects the ignition gun power supply circuit;

[0019] The single chip microcomputer sends an oil pump start control signal to the relay module, and the relay module connects the oil pump power supply circuit.

[0020] Preferably, the relay module disconnects the power supply circuits of the oil pump and the blower, which is implemented as follows:

[0021] The single-chip microcomputer sends an oil pump stop control signal and a blower blowing gear connection signal to the relay module. After receiving the above signals, the relay module disconnects the oil pump power supply circuit and adjusts the blower to the blowing gear; after the predetermined blowing time is reached, the single-chip microcomputer sends a blower stop control signal to the relay module, and the relay module disconnects the blower power supply circuit.

[0022] Preferably, it also includes a flame detection device for detecting whether the flame is extinguished; when the flame detection device detects that the flame is extinguished, it sends an extinguishing signal to the single-chip microcomputer, and the single-chip microcomputer starts the flame interlock protection process; if the ignition is successful, it enters the running state.

[0023] Preferably, the flame interlock protection process is:

[0024] The single-chip microcomputer sends an oil pump stop control signal and a blower blow-off gear connection signal to the relay module. After receiving the above signals, the relay module disconnects the oil pump power supply circuit and adjusts the blower to the blow-off gear. After the predetermined blow-off time is reached, the single-chip microcomputer sends a blower stop control signal to the relay module, and the relay module disconnects the blower power supply circuit.

[0025] When the oil pump fails, the oil pump alarm indicator light will light up, the single chip computer sends a blower stop control signal to the relay module, and the relay module disconnects the blower power supply circuit;

[0026] When the blower fails, the blower alarm indicator light will light up, the alarm buzzer will sound, the microcontroller will send an oil pump stop control signal to the relay module, and the relay module will disconnect the power supply circuit of the oil pump.

[0027] Preferably, the operational amplifier unit for amplifying the blower voltage control signal includes a resistor R1, a resistor R2 and an operational amplifier U1, the positive input end of the operational amplifier U1 is connected to the blower voltage control signal, the negative input end is simultaneously connected to one end of the resistor R1 and one end of the resistor R2, the other end of the resistor R2 is grounded, and the other end of the resistor R1 is connected to the output end of the operational amplifier U1; the negative end of the voltage input of the operational amplifier U1 is grounded, the positive end of the voltage input is connected to the transformer module, and the output end of the operational amplifier U1 is connected to the speed control interface of the blower.

[0028] Preferably, the operational amplifier unit for amplifying the oil pump voltage control signal includes a resistor R3, a resistor R4 and an operational amplifier U2, the positive input end of the operational amplifier U2 is connected to the oil pump voltage control signal, the negative input end is simultaneously connected to one end of the resistor R3 and one end of the resistor R4, the other end of the resistor R4 is grounded, and the other end of the resistor R3 is connected to the output end of the operational amplifier U2; the negative end of the voltage input of the operational amplifier U2 is grounded, the positive end of the voltage input is connected to the transformer module, and the output end of the operational amplifier U2 is connected to the speed control interface of the oil pump.

[0029] Preferably, the control system also has the capability of real-time fault detection.

[0030] Preferably, the single chip microcomputer collects voltage signals of the blower and the oil pump in real time to determine whether there is a fault in the operating state of the burner, thereby realizing real-time fault detection.

[0031] The beneficial effects of the present invention compared with the prior art are:

[0032] (1) More stable: When the burner needs to switch loads during stable operation, the traditional manual control directly adjusts the air-oil parameters to the corresponding load. If the air-oil ratio is not appropriate, it is easy to extinguish the flame, causing the flame to become unstable and extinguished. However, the present invention designs a linear switching strategy through single-chip microcomputer control. The parameter switching between each gear is gradual and linear, which will ensure the stability of the flame.

[0033] (2) Safer: The control system of the present invention is designed with a flame detection device. When it detects that the flame is extinguished, it will immediately start the protection program, shut down the oil pump, and start a strong wind to blow away the residual atomized fuel in the burner, ensuring the safety of the next ignition and preventing explosion.

[0034] (3) More convenient: The control system of the present invention has a one-button ignition function. The burner can be ignited by simply pressing the start button. There is no need to manually operate the start and stop of air and oil, which improves the automation control level of the burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a block diagram of a single-chip microcomputer-based external combustion thermoacoustic generator diesel burner control system according to the present invention;

[0036] FIG2 is a schematic diagram of a control system module according to the present invention;

[0037] FIG3 is a schematic diagram of the control system structure of the present invention;

[0038] FIG4 is a schematic diagram of one input and output of the operational amplifier module according to the present invention. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the embodiments.

[0040] The present invention discloses a single-chip microcomputer-based control system for an external-combustion thermoacoustic generator diesel burner. The control system comprises a transformer module, a single-chip microcomputer, an operational amplifier module, and a relay module. The transformer module converts 24V DC voltage into 5V DC voltage to power the single-chip microcomputer and relay module. The operational amplifier module amplifies the 0-3.3V output voltage of the single-chip microcomputer to control the speed of the blower and oil pump. The single-chip microcomputer, as the core of the entire control system, controls the logical start and stop of the power supply to the burner's blower, igniter, and oil pump through the relay module. A block diagram of the control system is shown in Figure 1. The blower and oil pump speeds are further linearly controlled to coordinate with the generator to complete the startup process, thereby starting the generator. The present invention controls the burner's thermal load based on the heat required by the generator's hot end. During startup, the air-to-fuel ratio is linearly increased, maintaining a slow flame growth, and gradually raising the burner's hot end temperature until it reaches the generator's startup state. After startup is complete, the air volume and oil pump load are continuously controlled, allowing operation at different loads as required to ensure stable generator operation. The system also features burner flameout protection and oil pump and blower fault interlock protection. During system operation, if the burner unexpectedly goes out, the flame detection device detects the loss of the flame signal, triggering an interlock and automatically initiating the flameout protection program. First, the oil pump is shut down, and the blower starts blowing with high airflow and then shuts down. If the oil pump fails, the alarm indicator will illuminate, and the blower power will automatically shut down. If the blower fails, the alarm indicator will illuminate, the alarm buzzer will sound, alerting the user, and the oil pump power will automatically shut down.

[0041] Specifically, the transformer module converts the external 24V DC voltage into 5V DC to power the microcontroller and relay module. Upon receiving the start control signal from the microcontroller, the relay module sequentially activates the burner's blower, igniter, and oil pump. Upon receiving the stop control signal from the microcontroller, it disconnects the oil pump and blower power circuits. Upon receiving the start signal, the microcontroller sends a start control signal to the relay module. During the startup process, the microcontroller generates blower and oil pump voltage control signals, which are then sent to the operational amplifier module. Upon receiving the stop signal, the microcontroller sends a stop control signal to the relay module. During startup, the blower and oil pump voltage control signals ensure a linear increase in the burner's air-to-fuel ratio, gradually raising the burner's hot-end temperature until the generator reaches its starting state. The operational amplifier module amplifies the blower voltage control signal and sends it to the blower, while the oil pump voltage control signal is amplified and sent to the oil pump.

[0042] During operation, the single-chip microcomputer generates blower voltage control signals and oil pump voltage control signals to enable the burner to operate under the set air volume and oil pump load, ensuring stable operation of the generator; when the load needs to be switched, the single-chip microcomputer adjusts the blower voltage control signals and oil pump voltage control signals to make the burner's air volume and oil pump load linearly transition to the load to be switched.

[0043] The blower is set with a blow-off gear and a running gear. The single-chip microcomputer sends a start control signal to the relay module. After receiving the start control signal from the single-chip microcomputer, the relay module starts the blower, ignition gun, and oil pump of the burner in sequence. The process is as follows:

[0044] The single chip computer sends a blower blow-off gear on signal to the relay module, and the relay module adjusts the blower to the blow-off gear;

[0045] After the predetermined blowing time is reached, the single chip computer sends a blower operation gear on signal to the relay module, and the relay module adjusts the blower to the operation gear;

[0046] The single chip computer sends an ignition gun start control signal to the relay module, and the relay module connects the ignition gun power supply circuit;

[0047] After the ignition gun works for a predetermined time, the single chip computer sends an ignition gun stop control signal to the relay module, and the relay module disconnects the ignition gun power supply circuit;

[0048] The single chip microcomputer sends an oil pump start control signal to the relay module, and the relay module connects the oil pump power supply circuit.

[0049] The relay module disconnects the power supply circuits to the oil pump and blower as follows:

[0050] The single-chip microcomputer sends an oil pump stop control signal and a blower blowing gear connection signal to the relay module. After receiving the above signals, the relay module disconnects the oil pump power supply circuit and adjusts the blower to the blowing gear; after the predetermined blowing time is reached, the single-chip microcomputer sends a blower stop control signal to the relay module, and the relay module disconnects the blower power supply circuit.

[0051] The flame detection device is used to detect whether the flame is extinguished; when the flame detection device detects that the flame is extinguished, it sends a flameout signal to the microcontroller, and the microcontroller starts the flame interlock protection process; if the ignition is successful, it enters the running state.

[0052] The flame interlock protection process is:

[0053] The single-chip microcomputer sends an oil pump stop control signal and a blower blow-off gear connection signal to the relay module. After receiving the above signals, the relay module disconnects the oil pump power supply circuit and adjusts the blower to the blow-off gear. After the predetermined blow-off time is reached, the single-chip microcomputer sends a blower stop control signal to the relay module, and the relay module disconnects the blower power supply circuit.

[0054] When the oil pump fails, the oil pump alarm indicator light will light up, the single chip computer sends a blower stop control signal to the relay module, and the relay module disconnects the blower power supply circuit;

[0055] When the blower fails, the blower alarm indicator light will light up, the alarm buzzer will sound, the microcontroller will send an oil pump stop control signal to the relay module, and the relay module will disconnect the power supply circuit of the oil pump.

[0056] The display components of the control system are shown in Figure 2.

[0057] The diesel burner control system hardware utilizes a single-chip microcomputer as the controller. The STM32 series F103VET6 microcontroller features DI / DO ports, D / A output ports, and an RS485 communication port. It also includes a main power switch, power conversion module, relay module, operational amplifier module, microcontroller module, LED indicator, and pushbutton module. The LED status allows the user to determine the current operating status of the control system and execute various control actions using the pushbutton control system. A schematic diagram of the control system structure is shown in Figure 3.

[0058] The controller provided by the present invention includes a power supply interface for connecting to a power source, a drive interface for driving the blower and oil pump, an interface for blower and oil pump speed feedback, an interface for connecting a flame detection device, and power supply interfaces for the blower, ignition gun, and oil pump. The controller circuit comprises the following circuit modules: a microprocessor single-chip computer with a D / A conversion interface and an I / O interface; a microprocessor power supply circuit centered around the microprocessor single-chip computer, connected to the single-chip computer power supply terminal; an operational amplifier module, a single-channel operational amplifier unit for amplifying the blower voltage control signal, comprising resistors R1, R2, and an operational amplifier U1. Resistor R1 has one end connected to the amplifier output and the other to the amplifier's negative input. Resistor R2 has one end connected to the operational amplifier output and the other to ground. The negative voltage input terminal of operational amplifier U1 is grounded, while the positive voltage input terminal is connected to the transformer module. The operational amplifier input is connected to the microprocessor single-chip computer D / A interface, and the output is connected to the blower speed control interface. The single-channel principle of the operational amplifier module is shown in Figure 4.

[0059] The operational amplifier unit for amplifying the oil pump voltage control signal includes resistors R3, R4 and operational amplifier U2. The positive input end of operational amplifier U2 is connected to the oil pump voltage control signal, and the negative input end is connected to one end of resistor R3 and one end of resistor R4 at the same time. The other end of resistor R4 is grounded, and the other end of resistor R3 is connected to the output end of operational amplifier U2; the negative end of the voltage input of operational amplifier U2 is grounded, the positive end of the voltage input is connected to the transformer module power supply VCC, and the output end of operational amplifier U2 is connected to the speed control interface of the oil pump.

[0060] The relay module's power supply is connected to the output of the power conversion module, the coil interface is connected to the DO port of the microprocessor, and the relay's normally open contact output is connected to a 24V DC power supply to power the blower, oil pump, and ignition gun. The LED and pushbutton are connected to the microprocessor's I / O to control and monitor the system's operating status.

[0061] The present invention also includes a flame detection device and equipment fault detection. The flame detection device detects the flame signal through a thermocouple, and then converts the potential difference generated on the thermocouple into a switching signal. When the potential difference exceeds a certain threshold, it is considered that there is a fire. When the flame detection terminal is in the disconnected state, it is considered that there is no fire, the flameout interlock protection is triggered, and the flameout protection program is executed; when the terminal is in the closed state, it is considered that there is a fire, and the LED display shows that there is a fire. Equipment fault detection connects the voltage signal fed back by the blower, oil pump, etc. to the input port of the single-chip computer, and judges the operating status of the equipment by detecting the voltage value fed back by the equipment, and judges whether there is a fault based on the equipment operating status. This control system can ensure the combustion state and is suitable for use in high-altitude areas.

[0062] The diesel burner control system of the external combustion thermoacoustic generator of the present invention,

[0063] (1) The port definitions for the power supply circuit design of "blower, ignition gun, and oil pump" are as follows:

[0064] (2) The necessary port definitions for the microcontroller designed for the "buttons and indicator lights on the control panel" are as follows:

[0065] (3) The controlled device can be connected to the single-chip microcomputer through the designed power supply circuit port and the single-chip microcomputer port to realize automatic control. The control system requires an external 24VDC power supply. During the startup process, you only need to press the "Start" button to realize one-key ignition, and start the blower, ignition gun and oil pump in sequence. During the operation, press the "Stop" button to stop the oil pump immediately and the blower will blow high air; the "Start" indicator light turns off, the "Stop" indicator light turns on, the "Ready" indicator light turns on, and the corresponding gear indicator light turns off, then the control system is stopped.

[0066] The examples given above are used to illustrate the present invention and its practical applications, and are not intended to limit the present invention in any form. Any technician in this field who makes certain modifications and changes based on the above techniques and methods without departing from the scope of the technical solution of the present invention shall be regarded as equivalent embodiments with equivalent changes, such as modifying port or variable names, deleting some minor functions, and implementing control logic using different programming methods.

Claims

1. A single-chip microcomputer-based external combustion thermoacoustic generator diesel burner control system, characterized in that: Including transformer module, single chip microcomputer, operational amplifier module, relay module; Transformer module: converts the external input 24V DC voltage into 5V DC voltage to power the microcontroller and relay module; Relay module: after receiving the start control signal from the single chip microcomputer, it starts the blower, ignition gun and oil pump of the burner in sequence; after receiving the stop control signal from the single chip microcomputer, it disconnects the power supply circuit of the oil pump and the blower; MCU: after receiving the start signal, it sends a start control signal to the relay module; During the startup process, the blower voltage control signal and the oil pump voltage control signal are generated and sent to the operational amplifier module; after receiving the stop signal, the stop control signal is sent to the relay module; during the startup process, the blower voltage control signal and the oil pump voltage control signal ensure that the air and oil ratio of the burner increases linearly during the startup process, so that the hot end temperature of the burner gradually rises until it reaches the start-up state of the generator; Operational amplifier module: It includes two operational amplifier units, one of which amplifies the blower voltage control signal and sends it to the blower, and the other amplifies the oil pump voltage control signal and sends it to the oil pump.

2. According to the single chip microcomputer-based external combustion thermoacoustic generator diesel burner control system of claim 1, it is characterized by: During operation, the single-chip microcomputer generates blower voltage control signals and oil pump voltage control signals to enable the burner to operate under the set air volume and oil pump load, ensuring stable operation of the generator; when the load needs to be switched, the single-chip microcomputer adjusts the blower voltage control signals and oil pump voltage control signals to make the burner's air volume and oil pump load linearly transition to the load to be switched.

3. According to the single chip microcomputer-based external combustion thermoacoustic generator diesel burner control system of claim 1, it is characterized by: The blower is provided with a blow-off gear and an operating gear. The single-chip microcomputer sends a start control signal to the relay module. After the relay module receives the start control signal of the single-chip microcomputer, the blower, the ignition gun and the oil pump of the burner are started in sequence. The process is as follows: The single chip computer sends a blower blow-off gear on signal to the relay module, and the relay module adjusts the blower to the blow-off gear; After the predetermined blowing time is reached, the single chip microcomputer sends a blower operation gear on signal to the relay module, and the relay module adjusts the blower to the operation gear; The single chip computer sends an ignition gun start control signal to the relay module, and the relay module connects the ignition gun power supply circuit; After the ignition gun works for a predetermined time, the single chip computer sends an ignition gun stop control signal to the relay module, and the relay module disconnects the ignition gun power supply circuit; The single chip microcomputer sends an oil pump start control signal to the relay module, and the relay module connects the oil pump power supply circuit.

4. According to the single chip microcomputer-based external combustion thermoacoustic generator diesel burner control system of claim 3, it is characterized by: The relay module disconnects the power supply circuit of the oil pump and the blower. This is achieved as follows: The single-chip microcomputer sends an oil pump stop control signal and a blower blowing gear connection signal to the relay module. After receiving the above signals, the relay module disconnects the oil pump power supply circuit and adjusts the blower to the blowing gear. After the predetermined blowing time is reached, the single-chip microcomputer sends a blower stop control signal to the relay module, and the relay module disconnects the blower power supply circuit.

5. According to the single chip microcomputer-based external combustion thermoacoustic generator diesel burner control system of claim 1, it is characterized by: It also includes a flame detection device for detecting whether the flame is extinguished; when the flame detection device detects that the flame is extinguished, it sends an extinguishing signal to the single-chip microcomputer, and the single-chip microcomputer starts a flame interlock protection process; If the ignition is successful, it enters the running state.

6. The single chip microcomputer-based external combustion thermoacoustic generator diesel burner control system according to claim 5 is characterized in that: The flame interlock protection process is as follows: The single-chip microcomputer sends an oil pump stop control signal and a blower blow-off gear connection signal to the relay module. After receiving the above signals, the relay module disconnects the power supply circuit of the oil pump and adjusts the blower to the blow-off gear. After the predetermined blow-off time is reached, the single-chip microcomputer sends a blower stop control signal to the relay module, and the relay module disconnects the power supply circuit of the blower. When the oil pump fails, the oil pump alarm indicator light will light up, the single chip computer sends a blower stop control signal to the relay module, and the relay module disconnects the blower power supply circuit; When the blower fails, the blower alarm indicator light will light up, the alarm buzzer will sound, the single chip computer will send an oil pump stop control signal to the relay module, and the relay module will disconnect the power supply circuit of the oil pump.

7. The single chip microcomputer-based external combustion thermoacoustic generator diesel burner control system according to claim 1 is characterized in that: The operational amplifier unit for amplifying the blower voltage control signal includes a resistor R1, a resistor R2 and an operational amplifier U1. The positive input end of the operational amplifier U1 is connected to the blower voltage control signal, and the negative input end is simultaneously connected to one end of the resistor R1 and one end of the resistor R2. The other end of the resistor R2 is grounded, and the other end of the resistor R1 is connected to the output end of the operational amplifier U1; the negative end of the voltage input of the operational amplifier U1 is grounded, the positive end of the voltage input is connected to the transformer module, and the output end of the operational amplifier U1 is connected to the speed control interface of the blower.

8. The single chip microcomputer-based external combustion thermoacoustic generator diesel burner control system according to claim 1 is characterized by: The operational amplifier unit for amplifying the oil pump voltage control signal includes a resistor R3, a resistor R4 and an operational amplifier U2. The positive input end of the operational amplifier U2 is connected to the oil pump voltage control signal, and the negative input end is simultaneously connected to one end of the resistor R3 and one end of the resistor R4. The other end of the resistor R4 is grounded, and the other end of the resistor R3 is connected to the output end of the operational amplifier U2; the negative end of the voltage input of the operational amplifier U2 is grounded, the positive end of the voltage input is connected to the transformer module, and the output end of the operational amplifier U2 is connected to the speed control interface of the oil pump.

9. The single chip microcomputer-based external combustion thermoacoustic generator diesel burner control system according to claim 5, characterized in that: The flame detection device detects the flame signal through a thermocouple.

10. The single chip microcomputer-based external combustion thermoacoustic generator diesel burner control system according to claim 1, characterized in that: The control system also has the capability of real-time fault detection.

11. The single chip microcomputer-based external combustion thermoacoustic generator diesel burner control system according to claim 10, characterized in that: The single chip microcomputer collects the voltage signals of the blower and oil pump in real time to determine whether there is any fault in the operating status of the burner, thus realizing real-time fault detection.

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