Flame detection control system based on RK3588 chip

Abstract

The invention discloses a flame detection control system based on an RK3588 chip, which comprises a photoelectric detection module, a signal processing module, an image acquisition module, a main control module and an early warning module, and is characterized in that the accuracy and reliability of flame detection are remarkably improved by fusing infrared and ultraviolet sensor technologies and combining image acquisition and processing. The system adopts an advanced signal processing module, signal amplification and filtering are optimized, effective amplification and stable processing of weak electric signals are ensured, and the reliability of flame detection is further improved. And in addition, the RK3588 chip has high-performance computing and image processing capabilities, so that the system can quickly identify flame characteristics, and real-time monitoring and early warning are realized. In addition, due to the self-diagnosis function and the timely alarm mechanism of the system, the stability and safety of the system are further enhanced, and powerful technical guarantee is provided for fire prevention and emergency response.

Description

Technical Field

[0001] The invention relates to the technical field of flame detection, and in particular to a flame detection control system based on an RK3588 chip. Background Art

[0002] With the rapid development of modern society, fire safety issues are receiving increasing attention. Traditional flame detection systems often rely on a single sensor technology. For example, infrared sensors identify flames by detecting specific infrared radiation generated by flames. However, infrared radiation is not unique to flames. Other heat sources or objects may also generate similar infrared radiation under certain conditions, thus triggering false alarms in the system.

[0003] In view of this, the existing flame detection system uses multi-sensor fusion for flame detection. For example, the existing patent document with application number 2021104716665 discloses a tunnel flame detection system based on computer vision and artificial intelligence algorithm. The system combines infrared sensors, ultraviolet sensors and camera modules, and improves the accuracy and reliability of flame detection to a certain extent by collecting video images and radiation information in the tunnel.

[0004] However, although the system uses multi-sensor fusion technology, it still has some defects. First, the system is greatly affected by external environmental factors in signal processing. For example, the accuracy and stability of infrared sensors are affected by ambient temperature. High temperature environment may cause the performance of electronic components inside the sensor to decline and reduce sensitivity, thus affecting the accuracy of acquisition. Strong sunlight, other infrared sources (such as heat sources, heating equipment, etc.) and artificial light sources may interfere with the operation of infrared sensors. The interference noise generated by these interference sources can easily cause false alarms of sensors. Ultraviolet sensors may be affected by factors such as lightning, arcs, welding light and sunlight through the ozone hole. These factors can cause spike noise inside the sensor, which can easily cause false alarms of ultraviolet flame detectors. Secondly, the system has a certain delay in data processing and analysis, mainly because the system needs to process data from multiple modules at the same time, and these data often have different formats and characteristics, so complex preprocessing and feature extraction are required.

[0005] In view of the above situation, the present invention aims to provide a new solution to solve this problem. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a flame detection control system based on the RK3588 chip.

[0007] The technical solution is: flame detection control system based on RK3588 chip, including:

[0008] The photoelectric detection module includes an infrared sensor and an ultraviolet sensor, which are used to capture the infrared light signal and ultraviolet light signal emitted by the flame respectively, and convert the light signal into an electrical signal for output;

[0009] A signal processing module, connected to the photoelectric detection module, for amplifying, filtering and digitalizing the electrical signal;

[0010] Image acquisition module, used to capture image data of the monitored area and provide visual information to assist flame identification;

[0011] The main control module, based on the RK3588 chip processor, receives the processed digital signals from the signal processing module and the image acquisition module, and performs flame recognition and fire level judgment;

[0012] An early warning module is connected to the main control module, and sends out an alarm signal when the main control module identifies a flame and determines that the fire level reaches a preset threshold;

[0013] Wherein, the signal processing module includes:

[0014] A first signal processing unit, used for preprocessing the electrical signal output by the infrared sensor;

[0015] A second signal processing unit, used for preprocessing the electrical signal output by the ultraviolet sensor;

[0016] The analog-to-digital conversion unit is used to convert the analog electrical signal preprocessed by the first signal processing unit and the second signal processing unit into a digital signal.

[0017] Preferably, the first signal processing unit includes:

[0018] A pre-filter amplifier circuit is used to perform preliminary filtering and amplification processing on the electrical signal output by the infrared sensor, and to add a protection component during the signal processing process to improve the signal-to-noise ratio of the signal;

[0019] The first amplitude modulation output circuit is used to perform amplitude modulation on the signal processed by the pre-filter amplifier circuit to meet the input requirement of the analog-to-digital conversion unit.

[0020] Preferably, the pre-filter amplifier circuit includes an op amp U1A, the in-phase input terminal of the op amp U1A is connected to resistor R1 and one end of capacitor C1, the other end of capacitor C1 is connected to the signal output terminal of the infrared sensor, the inverting input terminal of the op amp U1A is connected to resistor R2 and one end of adjustable resistor RP1, the other ends of resistor R1 and resistor R2 are connected to the first output terminal of the protection component, the other end of the adjustable resistor RP1 and the adjustment end are connected to the output terminal of the op amp U1A, and are connected to one end of resistor R6 through capacitor C3, and the other end of resistor R6 is connected to the second output terminal of the protection component.

[0021] Preferably, the protection component includes a +5V power supply, which is connected to one end of a resistor R4, one end of a capacitor C2, a cathode of a voltage-stabilizing diode Z1, the other end of the resistor R1 and the other end of the resistor R2 through a resistor R3, the other end of the capacitor C2 and the anode of the voltage-stabilizing diode Z1 are grounded, the other end of the resistor R4 is connected to the other end of the resistor R6 and is grounded through a resistor R5.

[0022] Preferably, the first amplitude modulation output circuit includes an operational amplifier UIB, the in-phase input terminal of the operational amplifier UIB is connected to one end of the resistor R6, the inverting input terminal of the operational amplifier UIB is connected to one end of the resistor R7 and the resistor R8, the other end of the resistor R7 is connected to the other end of the resistor R4, the other end of the resistor R8 is connected to the output terminal of the operational amplifier UIB and one end of the resistor R9 through the adjustable resistor RP2, the other end of the resistor R9 is connected to the cathode of the voltage regulator diode Z2, and is connected to the first receiving end of the analog-to-digital conversion unit through the resistor R10, and the anode of the voltage regulator diode Z2 is grounded.

[0023] Preferably, the second signal processing unit includes:

[0024] An anti-interference reference amplifier circuit, used to amplify and reduce noise on the electrical signal output by the ultraviolet sensor, and suppress spike interference generated by external radiation;

[0025] The second amplitude modulation output circuit is used to amplitude modulate the signal processed by the anti-interference reference amplifier circuit to meet the input requirement of the analog-to-digital conversion unit.

[0026] Preferably, the anti-interference reference amplifier circuit includes an op amp U2A, the in-phase input terminal of the op amp U2A is connected to resistor R11, capacitor C4 and one end of capacitor C5, the other end of capacitor C4 is connected to the signal output terminal of the ultraviolet sensor, the other end of resistor R11 is grounded, the other end of capacitor C5 is connected to the output terminal of the op amp U2A through resistor R12, the inverting input terminal of the op amp U2A is connected to resistor R13, resistor R14, one end of capacitor C6 and a reference power supply, the other end of capacitor C6 is grounded, the other end of resistor R13 is connected to the anode of diode D1, the other end of resistor R14 is connected to the cathode of diode D2, the cathode of diode D1 and the anode of diode D2 are connected to the output terminal of the op amp U2A and one end of resistor R17, and the other end of resistor R17 is grounded through a parallel resistor R18 and capacitor C7.

[0027] Preferably, the reference power supply includes an op amp U3A, the in-phase input terminal of the op amp U3A is connected to resistor R15 and one end of resistor R16, the other end of resistor R15 is connected to a +5V power supply, the other end of resistor R16 is grounded, and the inverting input terminal and output terminal of the op amp U3A are connected to the inverting input terminal of the op amp U2A.

[0028] Preferably, the second amplitude modulation output circuit includes an operational amplifier U2B, the in-phase input terminal of the operational amplifier U2B is connected to the other end of the resistor R17, the inverting input terminal of the operational amplifier U2B is connected to the resistor R19 and one end of the resistor R20, the other end of the resistor R19 is grounded, the other end of the resistor R20 is connected to the output terminal of the operational amplifier U2B and one end of the resistor R21 through the adjustable resistor RP3, the other end of the resistor R21 is connected to the cathode of the voltage regulator diode Z3, and is connected to the second receiving end of the analog-to-digital conversion unit through the resistor R22, and the anode of the voltage regulator diode Z3 is grounded.

[0029] Preferably, the image acquisition module includes:

[0030] A camera, used to capture images of the monitored area in real time;

[0031] The image signal processor optimizes the original image data captured by the camera and transmits the processed data to the main control module.

[0032] Through the above technical scheme, the beneficial effects of the present invention are as follows: the flame detection control system based on the RK3588 chip proposed in this application, by integrating infrared and ultraviolet sensor technology, combined with image acquisition and processing, significantly improves the accuracy and reliability of flame detection. The system adopts advanced signal processing modules to optimize signal amplification and filtering, ensure the effective amplification and stable processing of weak electrical signals, and further improve the reliability of detection. In addition, the high-performance computing and image processing capabilities of the RK3588 chip enable the system to quickly identify flame characteristics and realize real-time monitoring and early warning. In addition, the system's self-diagnosis function and timely alarm mechanism further enhance the stability and safety of the system, providing a strong technical guarantee for fire prevention and emergency response. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural block diagram of the system module of the present invention.

[0034] Figure 2 It is a circuit schematic diagram of the first signal processing unit in the present invention.

[0035] Figure 3 It is a circuit schematic diagram of the second signal processing unit in the present invention.

[0036] Figure 4 This is a circuit function module diagram of the RK3588 chip processor in the present invention. DETAILED DESCRIPTION

[0037] The above and other technical contents, features and effects of the present invention are described in detail below with reference to the attached Figure 1 To Attachment Figure 4 The detailed description of the embodiments will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0038] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0039] like Figure 1 As shown in the figure, the flame detection control system based on RK3588 chip includes:

[0040] The photoelectric detection module 10 includes an infrared sensor and an ultraviolet sensor, which are used to capture the infrared light signal and the ultraviolet light signal emitted by the flame, respectively, and convert the light signal into an electrical signal for output;

[0041] The signal processing module 20 is connected to the photoelectric detection module 10 and is used to amplify, filter and digitize the electrical signal;

[0042] An image acquisition module 30 is used to capture image data of the monitored area and provide visual information to assist flame identification;

[0043] The main control module 40, based on the RK3588 chip processor, receives the processed digital signals from the signal processing module 20 and the image acquisition module 30, and performs flame recognition and fire level judgment;

[0044] The early warning module 50 is connected to the main control module 40, and sends out an alarm signal when the main control module 40 identifies a flame and determines that the fire level reaches a preset threshold.

[0045] In the above, the photoelectric detection module uses infrared sensors and ultraviolet sensors, which can effectively capture the light signals of specific wavelengths emitted by flames. Infrared sensors mainly detect infrared radiation generated by flames, while ultraviolet sensors are more sensitive to ultraviolet radiation generated by flames. Through this dual detection mechanism, the photoelectric detection module can improve the accuracy of flame detection and reduce false alarms and missed alarms.

[0046] Furthermore, in order to ensure the accuracy of flame detection, a signal processing module is used to process the detection signals of the infrared sensor and the ultraviolet sensor. Figure 1 As shown, the signal processing module includes:

[0047] A first signal processing unit, used for preprocessing the electrical signal output by the infrared sensor;

[0048] A second signal processing unit, used for preprocessing the electrical signal output by the ultraviolet sensor;

[0049] The analog-to-digital conversion unit is used to convert the analog electrical signal preprocessed by the first signal processing unit and the second signal processing unit into a digital signal.

[0050] In a specific embodiment, the first signal processing unit includes:

[0051] The pre-filter amplifier circuit is used to perform preliminary filtering and amplification processing on the electrical signal output by the infrared sensor, and add protection components during the signal processing process to improve the signal-to-noise ratio;

[0052] The first amplitude modulation output circuit is used to perform amplitude modulation on the signal processed by the pre-filter amplifier circuit to meet the input requirement of the analog-to-digital conversion unit.

[0053] In the above, if Figure 2As shown, the pre-filter amplifier circuit includes an operational amplifier U1A, the in-phase input terminal of the operational amplifier U1A is connected to the resistor R1 and one end of the capacitor C1, the other end of the capacitor C1 is connected to the signal output end of the infrared sensor, the inverting input terminal of the operational amplifier U1A is connected to the resistor R2 and one end of the adjustable resistor RP1, the other ends of the resistor R1 and the resistor R2 are connected to the first output end of the protection component, the other end of the adjustable resistor RP1 and the adjustment end are connected to the output end of the operational amplifier U1A, and are connected to one end of the resistor R6 through the capacitor C3, and the other end of the resistor R6 is connected to the second output end of the protection component.

[0054] Among them, the protection component includes a +5V power supply, which is connected to one end of the resistor R4, one end of the capacitor C2, the cathode of the voltage-stabilizing diode Z1, the other end of the resistor R1 and the other end of the resistor R2 through the resistor R3, the other end of the capacitor C2 and the anode of the voltage-stabilizing diode Z1 are grounded, and the other end of the resistor R4 is connected to the other end of the resistor R6 and is grounded through the resistor R5.

[0055] During the operation of the pre-filter amplifier circuit, since the electrical signal output by the infrared sensor is often very weak, the op amp U1A is used as the main amplifier to amplify the input signal. At the same time, a high-pass filter is set at the front and back ends of the op amp U1A to remove low-frequency noise, that is, the capacitor C1 and the resistor R1 form a front-end high-pass filter, and the capacitor C3 and the resistor R6 form a back-end high-pass filter. In order to ensure that the tiny signal of the infrared sensor can be effectively amplified, a protection component is designed to improve the signal-to-noise ratio of the detection signal. The specific principle is as follows: First, the protection component uses the resistor voltage divider principle to Figure 2 Points A and B form protection potentials, which provide input impedance of the measurement system to the front-end high-pass filter and the back-end filter respectively, so as to reduce the signal loss in the transmission process, reduce noise and interference, and greatly improve the signal-to-noise ratio of the infrared sensor detection signal amplification. Secondly, the protection component also provides a bias voltage to the inverting input terminal of the op amp U1A at point C to ensure the stability of the operating point of the op amp U1A, which helps to reduce the zero drift of the op amp and avoid the op amp entering the nonlinear working area due to slight changes in the input signal, thereby affecting the amplification accuracy. Capacitor C2 works together with the voltage stabilizing diode Z1 to stabilize the output voltage of the protection component and reduce the impact of voltage fluctuations on signal processing.

[0056] The detection signal of the infrared sensor is processed by the pre-filter amplifier circuit and then sent to the first amplitude modulation output circuit for further processing. Specifically, the first amplitude modulation output circuit includes an op amp UIB, the in-phase input end of the op amp UIB is connected to one end of the resistor R6, the inverting input end of the op amp UIB is connected to one end of the resistor R7 and the resistor R8, the other end of the resistor R7 is connected to the other end of the resistor R4, the other end of the resistor R8 is connected to the output end of the op amp UIB and one end of the resistor R9 through the adjustable resistor RP2, the other end of the resistor R9 is connected to the cathode of the voltage zener diode Z2, and is connected to the first receiving end of the analog-to-digital conversion unit through the resistor R10, and the anode of the voltage zener diode Z2 is grounded.

[0057] In the processing of the first amplitude modulation output circuit, the operational amplifier UIB performs secondary amplification processing on the signal after pre-filtering and amplification. The signal amplification factor is changed by adjusting the adjustable resistor RP2 in the feedback network, so that the system can adapt to infrared detection signals of different strengths, ensuring that the signal will neither be distorted nor too strong during the amplification process, thereby meeting the input requirements of the analog-to-digital conversion unit. The voltage regulator diode Z2 further stabilizes the amplitude of the infrared detection signal after secondary amplification to ensure the effective implementation of the analog-to-digital conversion process.

[0058] In a specific embodiment, the second signal processing unit includes:

[0059] The anti-interference reference amplifier circuit is used to amplify and reduce the noise of the electrical signal output by the ultraviolet sensor and suppress the peak interference generated by external radiation;

[0060] The second amplitude modulation output circuit is used to amplitude modulate the signal processed by the anti-interference reference amplifier circuit to meet the input requirement of the analog-to-digital conversion unit.

[0061] In the above, if Figure 3 As shown, the anti-interference reference amplifier circuit includes an operational amplifier U2A, the in-phase input terminal of the operational amplifier U2A is connected to a resistor R11, a capacitor C4 and one end of a capacitor C5, the other end of the capacitor C4 is connected to the signal output terminal of the ultraviolet sensor, the other end of the resistor R11 is grounded, the other end of the capacitor C5 is connected to the output terminal of the operational amplifier U2A through a resistor R12, the inverting input terminal of the operational amplifier U2A is connected to a resistor R13, a resistor R14, one end of a capacitor C6 and a reference power supply, the other end of the capacitor C6 is grounded, the other end of the resistor R13 is connected to the anode of a diode D1, the other end of the resistor R14 is connected to the cathode of a diode D2, the cathode of the diode D1 and the anode of the diode D2 are connected to the output terminal of the operational amplifier U2A and one end of a resistor R17, and the other end of the resistor R17 is grounded through a parallel resistor R18 and the capacitor C7.

[0062] Among them, the reference power supply includes an op amp U3A, the non-inverting input terminal of the op amp U3A is connected to resistor R15 and one end of resistor R16, the other end of resistor R15 is connected to a +5V power supply, the other end of resistor R16 is grounded, and the inverting input terminal and output terminal of the op amp U3A are connected to the inverting input terminal of the op amp U2A.

[0063] During the operation of the anti-interference reference amplifier circuit, the detection signal of the ultraviolet sensor is sent to the operational amplifier U2A for preliminary amplification after the high-pass filter composed of capacitor C4 and resistor R11 reduces the noise. During the signal amplification process, the resistors R13 and R14 at the negative feedback end of the operational amplifier U2A cooperate with diodes D1 and D2 to suppress the interference of spike interference on the ultraviolet detection signal. When the external spike interference causes the output voltage of the operational amplifier U2A to rise, the diode D2 is turned on and the excess voltage is directed to the ground, thereby protecting the circuit from damage; on the contrary, when the voltage drops, the diode D1 is turned on and the excess voltage is also directed to the ground, realizing the suppression of spike interference. In order to suppress the fluctuation of external transient noise on the ultraviolet sensor measurement system, the resistor R12 and the capacitor C5 are set at the positive feedback end of the operational amplifier U2A to form a phase compensation, which helps to reduce the influence of external transient noise on the measurement system, make the output signal more stable, and enhance the anti-interference ability of the system.

[0064] At the same time, the reference power supply forms a stable voltage source through the op amp U3A, providing a stable reference voltage for the inverting input of the op amp U2A. The reference voltage ensures the stability of the inverting input voltage of the op amp U2A. When the output voltage of the op amp U2A is abnormal due to external spike interference, the reference voltage helps to quickly restore the working state of the op amp U3A, thereby playing a role in suppressing spike interference.

[0065] The second amplitude modulation output circuit further processes the ultraviolet detection signal processed by the anti-interference reference amplifier circuit. Specifically, the second amplitude modulation output circuit includes an operational amplifier U2B, the in-phase input terminal of the operational amplifier U2B is connected to the other end of the resistor R17, the inverting input terminal of the operational amplifier U2B is connected to the resistor R19 and one end of the resistor R20, the other end of the resistor R19 is grounded, the other end of the resistor R20 is connected to the output terminal of the operational amplifier U2B and one end of the resistor R21 through the adjustable resistor RP3, the other end of the resistor R21 is connected to the cathode of the voltage regulator diode Z3, and is connected to the second receiving end of the analog-to-digital conversion unit through the resistor R22, and the anode of the voltage regulator diode Z3 is grounded.

[0066] Among them, the operational amplifier U2B performs secondary amplification processing on the output signal of the anti-interference reference amplifier circuit. The signal amplification factor is changed by adjusting the adjustable resistor RP3 in its feedback network, so that the system can adapt to ultraviolet detection signals of different intensities, ensuring that the signal will neither be distorted nor too strong during the amplification process, thereby meeting the input requirements of the analog-to-digital conversion unit. The voltage regulator diode Z3 further stabilizes the amplitude of the ultraviolet detection signal after secondary amplification to ensure the effective implementation of the analog-to-digital conversion process.

[0067] In the above, the analog electrical signals preprocessed by the first signal processing unit and the second signal processing unit are sent to the analog-to-digital conversion unit to be converted into digital signals, so that the output signals of the infrared sensor and the ultraviolet sensor can be processed by the main control module.

[0068] In a specific embodiment, the image acquisition module includes:

[0069] A camera, used to capture images of the monitored area in real time;

[0070] The Image Signal Processor (ISP) optimizes the raw image data captured by the camera and transmits the processed data to the main control module.

[0071] ISP has functions such as automatic exposure, automatic white balance and automatic focus, and can automatically adjust image parameters according to ambient light conditions to improve image clarity and contrast. When the image data processed by ISP is sent to the main control module, the main control module will extract features such as color, texture and shape in the image and compare them with the flame feature model. If the image features match the flame feature model to a high degree, it is judged that there is a flame.

[0072] like Figure 4 As shown, the main control module in this application is built on the RK3588 chip processor, which not only has powerful computing power, but also integrates advanced 3D GPU image processing technology. The high-performance CPU and GPU of the RK3588 chip can efficiently execute complex algorithms. By training a large number of flame image samples, a flame feature model is established to quickly identify flame features and distinguish between flame and non-flame signals, so that the flame detection control system can accurately judge the flame in the environment in real time, greatly improving the accuracy and response speed of fire warning.

[0073] The RK3588 chip analyzes and processes the digital signal output by the analog-to-digital conversion unit and determines the level of the fire according to the system preset threshold. When the RK3588 chip recognizes the flame and determines that the fire level reaches the preset threshold, the early warning module is activated, thereby issuing an alarm signal.

[0074] In addition, the RK3588 chip processor is also responsible for communicating with other parts of the system, including interaction with the user interface and linkage with other security systems. Through the built-in network interface, the RK3588 chip can transmit the detected flame information to the remote monitoring center in real time to ensure timely response in the event of a fire. It not only improves the system's response speed, but also provides managers with a convenient monitoring method, allowing them to keep abreast of the on-site situation and make timely decisions.

[0075] In order to further improve the reliability of the system, the RK3588 chip also has a self-diagnosis function, which ensures that it can work normally at critical moments by regularly checking the status of each sensor. Once any abnormality is detected, the RK3588 chip will immediately start the alarm program and notify maintenance personnel to check and repair. This self-diagnosis and alarm mechanism greatly reduces the risk of false alarms or missed alarms caused by equipment failures, and provides strong technical support for protecting people's lives and property.

[0076] In summary, the flame detection control system based on the RK3588 chip proposed in this application has significantly improved the accuracy and reliability of flame detection by integrating infrared and ultraviolet sensor technology and combining image acquisition and processing. The system adopts advanced signal processing modules to optimize signal amplification and filtering, ensure the effective amplification and stable processing of weak electrical signals, and further improve the reliability of detection. In addition, the high-performance computing and image processing capabilities of the RK3588 chip enable the system to quickly identify flame characteristics and realize real-time monitoring and early warning. In addition, the system's self-diagnosis function and timely alarm mechanism further enhance the stability and safety of the system, providing strong technical support for fire prevention and emergency response.

[0077] The above is a further detailed description of the present invention in combination with a specific implementation method, and it cannot be determined that the specific implementation of the present invention is limited to this; for technical personnel in the technical field to which the present invention belongs and related technical fields, based on the technical solution of the present invention, the expansion and replacement of operating methods and data should all fall within the protection scope of the present invention.

Claims

1. The flame detection control system based on RK3588 chip is characterized by: include: The photoelectric detection module includes an infrared sensor and an ultraviolet sensor, which are used to capture the infrared light signal and ultraviolet light signal emitted by the flame respectively, and convert the light signal into an electrical signal for output; A signal processing module, connected to the photoelectric detection module, for amplifying, filtering and digitalizing the electrical signal; Image acquisition module, used to capture image data of the monitored area and provide visual information to assist flame identification; The main control module, based on the RK3588 chip processor, receives the processed digital signals from the signal processing module and the image acquisition module, and performs flame recognition and fire level judgment; An early warning module is connected to the main control module, and sends out an alarm signal when the main control module identifies a flame and determines that the fire level reaches a preset threshold; Wherein, the signal processing module includes: A first signal processing unit, used for preprocessing the electrical signal output by the infrared sensor; A second signal processing unit, used for preprocessing the electrical signal output by the ultraviolet sensor; The analog-to-digital conversion unit is used to convert the analog electrical signal preprocessed by the first signal processing unit and the second signal processing unit into a digital signal.

2. According to the flame detection control system based on RK3588 chip in claim 1, it is characterized in that: The first signal processing unit comprises: A pre-filter amplifier circuit is used to perform preliminary filtering and amplification processing on the electrical signal output by the infrared sensor, and to add a protection component during the signal processing process to improve the signal-to-noise ratio of the signal; The first amplitude modulation output circuit is used to perform amplitude modulation on the signal processed by the pre-filter amplifier circuit to meet the input requirement of the analog-to-digital conversion unit.

3. According to the flame detection control system based on RK3588 chip in claim 2, it is characterized in that: The pre-filter amplifier circuit includes an operational amplifier U1A, the in-phase input terminal of the operational amplifier U1A is connected to the resistor R1 and one end of the capacitor C1, the other end of the capacitor C1 is connected to the signal output terminal of the infrared sensor, the inverting input terminal of the operational amplifier U1A is connected to the resistor R2 and one end of the adjustable resistor RP1, the other ends of the resistor R1 and the resistor R2 are connected to the first output terminal of the protection component, the other end of the adjustable resistor RP1 and the adjustment end are connected to the output terminal of the operational amplifier U1A, and are connected to one end of the resistor R6 through the capacitor C3, and the other end of the resistor R6 is connected to the second output terminal of the protection component.

4. The flame detection control system based on the RK3588 chip according to claim 3 is characterized in that: The protection component includes a +5V power supply, which is connected to one end of a resistor R4, one end of a capacitor C2, a cathode of a voltage-stabilizing diode Z1, the other end of the resistor R1 and the other end of the resistor R2 through a resistor R3. The other end of the capacitor C2 and the anode of the voltage-stabilizing diode Z1 are grounded. The other end of the resistor R4 is connected to the other end of the resistor R6 and is grounded through a resistor R5.

5. The flame detection control system based on the RK3588 chip according to claim 4 is characterized in that: The first amplitude modulation output circuit includes an operational amplifier UIB, the in-phase input terminal of the operational amplifier UIB is connected to one end of the resistor R6, the inverting input terminal of the operational amplifier UIB is connected to one end of the resistor R7 and the resistor R8, the other end of the resistor R7 is connected to the other end of the resistor R4, the other end of the resistor R8 is connected to the output terminal of the operational amplifier UIB and one end of the resistor R9 through the adjustable resistor RP2, the other end of the resistor R9 is connected to the cathode of the voltage regulator diode Z2, and is connected to the first receiving end of the analog-to-digital conversion unit through the resistor R10, and the anode of the voltage regulator diode Z2 is grounded.

6. The flame detection control system based on the RK3588 chip according to claim 1 is characterized in that: The second signal processing unit comprises: An anti-interference reference amplifier circuit, used to amplify and reduce noise on the electrical signal output by the ultraviolet sensor, and suppress spike interference generated by external radiation; The second amplitude modulation output circuit is used to amplitude modulate the signal processed by the anti-interference reference amplifier circuit to meet the input requirement of the analog-to-digital conversion unit.

7. The flame detection control system based on the RK3588 chip according to claim 6 is characterized in that: The anti-interference reference amplifier circuit includes an operational amplifier U2A, a non-inverting input end of the operational amplifier U2A is connected to a resistor R11, a capacitor C4 and one end of a capacitor C5, the other end of the capacitor C4 is connected to the signal output end of the ultraviolet sensor, the other end of the resistor R11 is grounded, the other end of the capacitor C5 is connected to the output end of the operational amplifier U2A through a resistor R12, an inverting input end of the operational amplifier U2A is connected to a resistor R13, a resistor R14, one end of a capacitor C6 and a reference power supply, the other end of the capacitor C6 is grounded, the other end of the resistor R13 is connected to the anode of a diode D1, the other end of the resistor R14 is connected to the cathode of a diode D2, the cathode of the diode D1 and the anode of the diode D2 are connected to the output end of the operational amplifier U2A and one end of a resistor R17, and the other end of the resistor R17 is grounded through a parallel resistor R18 and capacitor C7.

8. The flame detection control system based on the RK3588 chip according to claim 7 is characterized in that: The reference power supply includes an op amp U3A, the in-phase input terminal of the op amp U3A is connected to resistor R15 and one end of resistor R16, the other end of resistor R15 is connected to a +5V power supply, the other end of resistor R16 is grounded, and the inverting input terminal and output terminal of the op amp U3A are connected to the inverting input terminal of the op amp U2A.

9. The flame detection control system based on the RK3588 chip according to claim 7 is characterized in that: The second amplitude modulation output circuit includes an operational amplifier U2B, the in-phase input terminal of the operational amplifier U2B is connected to the other end of the resistor R17, the in-phase input terminal of the operational amplifier U2B is connected to the resistor R19 and one end of the resistor R20, the other end of the resistor R19 is grounded, the other end of the resistor R20 is connected to the output terminal of the operational amplifier U2B and one end of the resistor R21 through the adjustable resistor RP3, the other end of the resistor R21 is connected to the cathode of the voltage regulator diode Z3, and is connected to the second receiving end of the analog-to-digital conversion unit through the resistor R22, and the anode of the voltage regulator diode Z3 is grounded.

10. The flame detection control system based on the RK3588 chip according to claim 1 is characterized in that: The image acquisition module comprises: A camera, used to capture images of the monitored area in real time; The image signal processor optimizes the original image data captured by the camera and transmits the processed data to the main control module.

Images