Comprehensive control system for multi-channel information fusion

Abstract

The invention discloses a multi-channel information fusion comprehensive control system which comprises a communication interface module, a digital quantity input module, a sensor signal acquisition module, a main control module and a control output module. The device covers analog signals, digital signals, physical quantity signals monitored by various sensors and the like, and provides more comprehensive and abundant data sources for the system, so that the actual state of an industrial production process or an automatic system can be reflected more accurately. Especially in the aspect of sensor signal acquisition, effective suppression of power frequency noise is achieved through the synergistic effect of the signal mixing unit and the power frequency suppression unit, and the purity and reliability of signals are remarkably improved. According to the invention, through innovative design of consistency of signal acquisition and signal processing and diversity of communication interfaces, a more accurate, stable and flexible solution is provided for an industrial control and automation system.

Description

Technical Field

[0001] The present invention relates to the technical field of information processing, and in particular to an integrated control system for multi-channel information fusion. Background Art

[0002] In modern industrial control and automation systems, there are extremely high requirements for accurate acquisition, efficient processing and precise control of information. Multi-channel information fusion technology has emerged to integrate information from multiple different types of sensors and data sources to achieve comprehensive and accurate cognition and precise control of the target system or object.

[0003] However, the existing control system has many deficiencies in multi-channel information fusion processing. First, in the signal acquisition link, due to the widespread industrial frequency interference in the industrial environment, such as the fixed frequency noise (usually 50Hz or 60Hz and its harmonics) generated by motor operation and power transmission lines, the weak signal output by the sensor will be seriously contaminated. The amplitude of these power frequency noises may sometimes even approach or exceed the amplitude of the effective signal, causing the useful signal to be submerged, thereby greatly reducing the quality and reliability of the signal.

[0004] Secondly, the output signal characteristics of different sensors vary, including signal amplitude, frequency range, phase, etc. In the process of multi-channel signal acquisition, if there is no unified calibration and standardization mechanism, it is difficult for the system to ensure the consistency of data acquisition of each sensor signal. This makes it possible for signals from different channels to introduce errors due to inconsistent benchmarks during subsequent fusion processing, seriously affecting the control accuracy and stability of the entire system.

[0005] In addition, in terms of communication and connection with external devices, the interface types of traditional control systems are relatively single, and they cannot flexibly communicate and interact with various external devices efficiently. For example, in some systems that require remote monitoring and control, they only have limited serial port communication functions, making it difficult to achieve high-speed and stable network data transmission, and cannot meet the requirements of modern industrial Internet of Things for remote data transmission and control, limiting the application scope and scalability of the system.

[0006] In view of the above situation, the present invention aims to provide a new solution to solve this problem. Summary of the invention

[0007] 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 comprehensive control system for multi-channel information fusion.

[0008] The technical solution is: a comprehensive control system for multi-channel information fusion, including:

[0009] Communication interface module, used for data communication between the system and external devices;

[0010] Digital input module, used to receive digital signals from the outside and convert them into a data format recognizable by the system;

[0011] The sensor signal acquisition module is used to collect signal data from multiple different sensors and perform pre-processing;

[0012] A main control module, used to receive data from the communication interface module, the digital input module and the sensor signal acquisition module, and perform comprehensive analysis and processing; and

[0013] A control output module, used to control the action of the actuator according to the instructions of the main control module;

[0014] Wherein, the sensor signal acquisition module specifically includes:

[0015] A signal mixing unit, used for generating a local oscillator signal, and mixing the local oscillator signal with the output signal of the sensor;

[0016] A power frequency suppression unit, used to filter out power frequency noise from the mixed signal;

[0017] The reference unit is used to provide a reference signal to calibrate and standardize the entire signal acquisition work to achieve consistency in the sensor signal data acquisition.

[0018] Preferably, the signal mixing unit includes an operational amplifier U1 and a local oscillator signal generating network, the local oscillator signal generating network includes an adjustable resistor RP1 and an adjustable resistor RP2, one end of the adjustable resistor RP1 is connected to the resistor R2 and one end of the capacitor C3, the other end of the adjustable resistor RP1 is connected to the other end of the capacitor C3 and one end of the resistor R3, the adjustment end of the adjustable resistor RP1 is connected to the inverting input end of the operational amplifier U1 through the capacitor C4, one end of the adjustable resistor RP2 is connected to the resistor R1, the capacitor C1, one end of the capacitor C5 and the resistor R 2, the other end of the adjustable resistor RP2 is connected to the other end of the capacitor C5 and one end of the resistor R4, the adjustment end of the adjustable resistor RP2 is connected to the inverting input end of the operational amplifier U1 through the capacitor C6, the inverting input end of the operational amplifier U1 is also connected to the other end of the resistor R1 through the capacitor C2, the other end of the capacitor C1 is connected to the sensor signal output port, the other ends of the resistors R3 and R4 are connected to the output end of the operational amplifier U1, the non-inverting input end of the operational amplifier U1 is connected to the reference unit, and is grounded through the parallel resistor R5 and the capacitor C7.

[0019] Preferably, the power frequency suppression unit comprises:

[0020] The power frequency notch filter adopts a band-stop filter structure. When the mixed signal passes through the power frequency notch filter, the power frequency noise will be significantly attenuated, while the useful signals of other frequencies remain relatively unchanged;

[0021] A depth regulator is used to sample and feedback the output signal of the power frequency notch filter to adjust the filtering depth of the power frequency notch filter.

[0022] Preferably, the power frequency trap includes an op amp U2 and a double-T trap network, the double-T trap network includes resistors R6, R7, R8 and capacitors C8, C9 and C10, one end of resistor R7 and capacitor C8 is connected to the output end of op amp U1, the other end of resistor R7 is connected to one end of resistor R8 and capacitor C10, the other end of capacitor C8 is connected to one end of resistor R6 and capacitor C9, the other end of resistor R8 and capacitor C9 is connected to the inverting input end of op amp U2, the other end of resistor R6 is connected to the output end of op amp U2, one end of resistor R11 and the input end of the depth regulator, the other end of capacitor C10 is connected to the output end of the depth regulator, the in-phase input end of op amp U2 is grounded through resistor R9, and connected to the output end of op amp U2 through resistor R10, and the other end of resistor R11 is connected to the main control module through capacitor C11.

[0023] Preferably, the depth regulator includes an adjustable resistor RP3, an op amp U3 and a transistor Q1, one end of the adjustable resistor RP3 and the adjustment end are connected to the output end of the op amp U2, the other end of the adjustable resistor RP3 is connected to the inverting input end of the op amp U3 and is grounded through a resistor R12, the non-inverting input end of the op amp U3 is connected to the reference unit and is grounded through a resistor R13, the output end of the op amp U3 is connected to the other end of the capacitor C10 and the emitter of the transistor Q1, and the base and collector of the transistor Q1 are grounded.

[0024] Preferably, the reference unit includes a power supply VCC, which is connected to capacitor C12, one end of resistor R14 and the non-inverting input terminal of op amp U1 through resistor R15, the other end of capacitor C12 is grounded, and the other end of resistor R14 is connected to the non-inverting input terminal of op amp U3.

[0025] Preferably, the communication interface module includes:

[0026] RS422 / RS485 communication chip, used to realize serial communication with external devices;

[0027] USB port for data transfer with a computer or other USB compatible devices;

[0028] Ethernet interface, used for network communication, supports remote data transmission and control.

[0029] Preferably, the digital quantity input module comprises:

[0030] Optoelectronic isolation chip, used to isolate external signals from the system's internal circuits and protect the system from voltage shocks;

[0031] Signal buffer, used to temporarily store and buffer digital signals from the outside to ensure that the signals will not be lost or deformed during transmission;

[0032] The logic gate circuit is used to convert the digital signal into a data format recognizable by the main control module.

[0033] Preferably, the main control module adopts an FPGA+DSP architecture, the FPGA is used for data processing and logic control, and the DSP is used for data calculation and analysis.

[0034] Preferably, the control output module includes:

[0035] A digital / analog converter, used to convert the digital signal output by the main control module into an analog signal so as to control the analog actuator;

[0036] A pulse width modulation generator for generating a pulse signal with a variable duty cycle to control the power or speed of an actuator;

[0037] The relay drive circuit is used to drive the relay to realize the control of the switch actuator.

[0038] Through the above technical scheme, the beneficial effects of the present invention are as follows: the integrated control system of multi-channel information fusion of the present application has effectively improved the performance of modern industrial control and automation systems by virtue of its unique design and function. In the data acquisition link, the integrated multi-module can collect various types of data including analog, digital and various sensor physical quantity signals, enrich the data source to accurately present the actual state, among which, the sensor signal acquisition module adopts the signal mixing unit and the power frequency suppression unit to effectively suppress the power frequency noise, improve the signal purity and reliability, and the reference unit ensures the consistency of the signal acquisition of each sensor, and improves the processing accuracy of multi-channel signal fusion. The FPGA+DSP architecture adopted by the main control module allows the two to complement each other and work together, efficiently process multi-source heterogeneous data, enhance real-time response performance and data processing accuracy, and assist in accurate analysis and decision-making. In terms of control output, the use of multiple control methods realizes the precise control of the actuator, further improves the system control accuracy and flexibility, and optimizes the overall performance of the system in all directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural block diagram of the comprehensive control system of multi-channel information fusion of the present invention.

[0040] Figure 2It is a structural block diagram of the communication interface module in the present invention.

[0041] Figure 3 It is a structural block diagram of the digital quantity input module in the present invention.

[0042] Figure 4 It is a structural block diagram of the sensor signal acquisition module in the present invention.

[0043] Figure 5 This is a circuit schematic diagram of the sensor signal acquisition module in the present invention. DETAILED DESCRIPTION

[0044] 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 5 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.

[0045] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0046] like Figure 1 As shown, a comprehensive control system for multi-channel information fusion includes:

[0047] Communication interface module, used for data communication between the system and external devices;

[0048] Digital input module, used to receive digital signals from the outside and convert them into a data format recognizable by the system;

[0049] The sensor signal acquisition module is used to collect signal data from multiple different sensors and perform pre-processing;

[0050] A main control module, used to receive data from the communication interface module, the digital input module and the sensor signal acquisition module, and perform comprehensive analysis and processing; and

[0051] The control output module is used to control the action of the actuator according to the instructions of the main control module.

[0052] In a specific embodiment, if Figure 2 As shown, the communication interface module includes:

[0053] RS422 / RS485 communication chip is used to realize serial communication with external devices. It has the characteristics of long transmission distance and strong anti-interference ability. It is suitable for connecting external devices such as various instruments and controllers on site. It can transmit data stably and ensure the reliability of communication.

[0054] The USB interface provides a convenient channel for data transmission between the system and a computer or other USB compatible devices, making it convenient for the system to perform operations such as program updates, data downloads, or uploading monitoring data. The USB interface is plug-and-play, easy to use and maintain, and can quickly connect to a computer, mobile storage device, etc. for temporary data interaction or configuration changes.

[0055] The Ethernet interface is used for network communication and supports remote data transmission and control. With the help of the Ethernet interface, the system can be connected to the local area network or even the Internet, allowing operators to monitor and control the integrated control system through the network at the remote end, greatly expanding the scope of use and operability of the system.

[0056] At the same time, the system is also equipped with digital input modules, such as Figure 3 As shown, specifically including:

[0057] Photoelectric isolation chip, which physically isolates external signals from the internal circuit of the system through optical coupling. When there is an external digital signal input, the light-emitting diode in the photoelectric isolation chip will emit light according to the signal state, and the photosensitive element on the other side will generate an electrical signal accordingly after receiving the light, thereby realizing the signal transmission and blocking the electrical connection at the same time, achieving the isolation effect and protecting the system from voltage shock;

[0058] Signal buffers are used to temporarily store and buffer external digital signals. In signal transmission lines, due to line impedance, interference and other factors, signals may be attenuated or jittered. Signal buffers can "repair" and regularize these signals to ensure that they continue to be transmitted backward in a stable and complete state, avoiding signal loss or deformation during transmission.

[0059] The logic gate circuit is used to convert the digital signal into a data format that can be recognized by the main control module. For example, the AND gate can output the corresponding valid signal only when multiple input signals meet specific conditions at the same time; the OR gate can output a valid signal as long as one input signal meets the conditions. After these logical operations, the original digital signal input from the outside can be converted into a data format that can be accurately recognized and processed by the main control module, so that the main control module can carry out subsequent comprehensive analysis and other work based on these formatted data.

[0060] In addition, in order to make the collected sensor signals more accurate and reliable and meet the subsequent processing and control requirements, the system Figure 4 As shown, the sensor signal acquisition module used specifically includes:

[0061] A signal mixing unit, used for generating a local oscillator signal and mixing the local oscillator signal with an output signal of the sensor;

[0062] A power frequency suppression unit, used to filter out power frequency noise from the mixed signal;

[0063] The reference unit is used to provide a reference signal to calibrate and standardize the entire signal acquisition work to achieve consistency in the sensor signal data acquisition.

[0064] In the above, if Figure 5 As shown, the signal mixing unit includes an operational amplifier U1 and a local oscillator signal generating network, and the local oscillator signal generating network includes an adjustable resistor RP1 and an adjustable resistor RP2, one end of the adjustable resistor RP1 is connected to the resistor R2 and one end of the capacitor C3, the other end of the adjustable resistor RP1 is connected to the other end of the capacitor C3 and one end of the resistor R3, the adjustment end of the adjustable resistor RP1 is connected to the inverting input end of the operational amplifier U1 through the capacitor C4, and one end of the adjustable resistor RP2 is connected to the resistor R1, the capacitor C1, one end of the capacitor C5 and the resistor R2 The other end of the adjustable resistor RP2 is connected to the other end of the capacitor C5 and one end of the resistor R4. The adjusting end of the adjustable resistor RP2 is connected to the inverting input end of the operational amplifier U1 through the capacitor C6. The inverting input end of the operational amplifier U1 is also connected to the other end of the resistor R1 through the capacitor C2. The other end of the capacitor C1 is connected to the sensor signal output port. The other ends of the resistors R3 and R4 are connected to the output end of the operational amplifier U1. The non-inverting input end of the operational amplifier U1 is connected to the reference unit and is grounded through the parallel resistor R5 and the capacitor C7.

[0065] Specifically, in the local oscillator signal generation network, the local oscillator signal is generated by a circuit composed of adjustable resistors RP1, RP2, capacitors C2-C6 and resistors R1-R4. The adjustable resistors RP1 and RP2 are used to adjust the parameters of the circuit, thereby affecting the frequency and amplitude of the local oscillator signal. Driven by the operational amplifier U1, the local oscillator signal generation network generates a periodic oscillation signal, namely the local oscillator signal, through the charging and discharging process of the capacitor. When the external sensor signal is input to the signal mixing unit, the signal is superimposed, that is, the sensor output signal and the local oscillator signal are added.

[0066] Through the above-mentioned mixing process, the frequency of the sensor output signal can be converted to enhance the sensor signal feature extraction and anti-interference capabilities. In the scenario of detecting weak signal changes, the mixed signal can highlight the signal characteristics that were originally hidden or difficult to observe in subsequent processing, which helps to improve the sensitivity and accuracy of detection. At the same time, when there are many co-frequency interferences in the frequency band where the sensor signal is located, mixing can be used to move it to other frequency bands to effectively avoid these interferences, thereby improving the quality and reliability of the signal and creating better conditions for subsequent signal processing and analysis.

[0067] The power frequency suppression unit includes a power frequency notch filter and a depth regulator. The power frequency notch filter adopts a band-stop filter structure. When the mixed signal passes through the power frequency notch filter, the power frequency noise will be significantly attenuated, while the useful signals of other frequencies remain relatively unchanged. Specifically, Figure 5 As shown, the power frequency trap includes an op amp U2 and a double-T trap network, the double-T trap network includes resistors R6, R7, R8 and capacitors C8, C9 and C10, one end of the resistor R7 and the capacitor C8 is connected to the output end of the op amp U1, the other end of the resistor R7 is connected to one end of the resistor R8 and the capacitor C10, the other end of the capacitor C8 is connected to one end of the resistor R6 and the capacitor C9, the other end of the resistor R8 and the capacitor C9 is connected to the inverting input end of the op amp U2, the other end of the resistor R6 is connected to the output end of the op amp U2, one end of the resistor R11 and the input end of the depth regulator, the other end of the capacitor C10 is connected to the output end of the depth regulator, the in-phase input end of the op amp U2 is grounded through the resistor R9, and is connected to the output end of the op amp U2 through the resistor R10, and the other end of the resistor R11 is connected to the main control module through the capacitor C11.

[0068] The depth regulator is used to sample and feedback the output signal of the power frequency trap to adjust the filtering depth of the power frequency trap. It includes an adjustable resistor RP3, an op amp U3 and a transistor Q1. One end of the adjustable resistor RP3 and the adjustment end are connected to the output end of the op amp U2. The other end of the adjustable resistor RP3 is connected to the inverting input end of the op amp U3 and is grounded through a resistor R12. The in-phase input end of the op amp U3 is connected to the reference unit and is grounded through a resistor R13. The output end of the op amp U3 is connected to the other end of the capacitor C10 and the emitter of the transistor Q1. The base and collector of the transistor Q1 are grounded.

[0069] In the specific implementation process, when the mixed signal is input from the output end of the op amp U1 to the twin-T notch network, according to the frequency characteristics of the RC circuit, the impedance characteristics of the twin-T network will cause the signal of the power frequency noise frequency to be greatly attenuated. Specifically, the combination of the capacitor and resistor of the twin-T network causes mutual interference in the transmission path of the signal at the power frequency, thereby consuming the energy of the power frequency signal. Through the band-stop filtering characteristics of the power frequency notch filter, these power frequency noises can be effectively filtered out from the mixed signal to improve the purity of the signal.

[0070] The main function of the depth regulator is to dynamically adjust the filtering depth of the power frequency trap according to the actual situation of the input signal. Specifically, one end of the adjustable resistor RP3 is connected to the output end of the op amp U2 with the adjustment end, and is used to obtain the output signal of the power frequency trap as a feedback signal. This feedback signal is input to the inverting input end of the op amp U3, and the in-phase input end of the op amp U3 is connected to the reference unit and grounded through the resistor R13, providing a stable reference voltage for the op amp U3. The op amp U3 compares and amplifies the feedback signal of the inverting input end and the reference voltage of the in-phase input end. Finally, the current passing through the capacitor C10 is adjusted according to the signal output by the op amp U3, thereby changing the parameters of the double-T trap network and realizing the adjustment of the filtering depth of the power frequency trap. Because the intensity and frequency components of power frequency noise may change under different working environments and signal conditions, the system can monitor the output signal quality of the power frequency notch filter in real time through the sampling feedback mechanism of the depth regulator. When it is found that the power frequency noise is not completely filtered out or the useful signal is excessively attenuated, the filtering depth can be automatically adjusted to achieve the best filtering effect.

[0071] At the same time, in the above processing, the base and collector of the transistor Q1 are grounded, and this connection mode makes the transistor Q1 work in a relatively stable state. Through the stable working point, the transistor Q1 can more accurately adjust the current according to the output signal of the operational amplifier U3. Through the adjustment of the double-T notch network by the transistor Q1, the notch frequency band can be appropriately widened or adjusted, so that the circuit can filter out the power frequency noise while also suppressing the thermal noise to a certain extent.

[0072] In the scenario of multi-channel sensor signal acquisition, different sensors may have inconsistent output signal benchmarks due to their own characteristics, working environment and other factors. The benchmark unit provides a stable and accurate benchmark signal for the entire signal acquisition work, ensuring the consistency of the data acquisition of each sensor signal, thereby improving the precision and accuracy of the system's multi-channel sensor signal fusion processing. Specifically, the benchmark unit includes a power supply VCC, which is connected to the capacitor C12, one end of the resistor R14 and the in-phase input terminal of the op amp U1 through a resistor R15, the other end of the capacitor C12 is grounded, and the other end of the resistor R14 is connected to the in-phase input terminal of the op amp U3.

[0073] When sensor signals from multiple channels are pre-processed and enter the main control module for fusion processing, the reference unit has ensured the consistency of the signal acquisition stage, so that the main control module can analyze and comprehensively process these signals more accurately.

[0074] In the specific implementation process, the main control module adopts FPGA+DSP architecture. FPGA (field programmable gate array) has rich logic resources and flexible programming characteristics. When the data from the communication interface module, digital input module and sensor signal acquisition module are transmitted to the main control module, FPGA first receives and organizes the data preliminarily. It can process multiple data channels in parallel, and use its internal programmable logic unit to quickly decode, convert the format and make preliminary logical judgments on the data. For example, for the digital signal transmitted from the digital input module, FPGA can quickly identify the type and state change of the signal through pre-written logic code, convert it into a unified data format within the system, and preliminarily screen and classify it according to the preset logic rules, and determine which data needs to be processed immediately and which data can be temporarily cached for subsequent processing.

[0075] During the data processing, FPGA is also responsible for the logic control function of the system. It can generate various control signals and coordinate the working sequence and data flow between various modules. For example, it controls the sampling frequency and start and stop of the sensor signal acquisition module to ensure the accuracy and timeliness of data acquisition; interacts with the communication interface module to achieve reliable data transmission and reception confirmation, etc. The parallel processing capability of FPGA enables it to complete these complex logic operations in a very short time, improving the real-time response performance of the system.

[0076] DSP (digital signal processor) focuses on accurate calculation and in-depth analysis of data. Data that has been initially processed by FPGA is transmitted to DSP, which uses its specially designed hardware multipliers, accumulators and optimized instruction sets to perform complex mathematical operations on the data. For example, for the data of analog signals collected by the sensor signal acquisition module after ADC conversion, DSP can perform digital filtering, spectrum analysis, feature extraction and other operations to extract useful information from the signal. In the process of signal processing, DSP can use various digital signal processing algorithms, such as fast Fourier transform (FFT), wavelet transform, etc., to analyze the data efficiently and accurately, so as to accurately obtain key information such as the changing trend and frequency characteristics of the physical quantity measured by the sensor.

[0077] DSP can also work with FPGA. If FPGA encounters a task that requires complex calculations during processing, it can transmit the relevant data to DSP, which will return the result to FPGA after completing the calculation. FPGA will continue to perform subsequent logic control and data processing operations. This collaborative working mode gives full play to the parallel processing advantages of FPGA and the powerful computing power of DSP, and improves the data processing efficiency and accuracy of the entire main control module.

[0078] The main control module can uniformly receive, convert, process and fuse these different types of data through the collaborative work of FPGA and DSP, and integrate them into information that the system can understand and use, providing comprehensive and accurate data support for subsequent control decisions. Based on the fusion processing results of multi-channel data, the main control module can make accurate control decisions. The specific control output process is as follows:

[0079] When the main control module generates digital control signals according to the system's operating status and control strategy, these digital signals are transmitted to the digital / analog converter (DAC) and converted into corresponding analog signals. The DAC has high conversion accuracy and linearity, thereby ensuring the accuracy of subsequent control of analog actuators. Then, these analog signals are used to drive analog actuators, such as controlling the speed of DC motors, the opening of regulating valves, etc., to achieve precise control of continuously changing physical quantities.

[0080] Pulse width modulation (PWM) generators provide an efficient and flexible way to control the power or speed of actuators. Compared with traditional analog control methods, PWM control has higher efficiency and better dynamic response performance. The main control module can flexibly adjust the frequency and duty cycle parameters of the PWM generator according to the real-time needs of the system, thereby accurately controlling the power or speed of the actuator.

[0081] The relay drive circuit is used to drive the relay to realize the control of the switch actuator, such as contactor, solenoid valve, etc. The relay drive circuit can convert the low-level signal output by the main control module into a high-level signal to control the contact and release of the relay, thereby realizing the switch control of the actuator.

[0082] In summary, the integrated control system of multi-channel information fusion proposed in this application has significantly improved the performance of modern industrial control and automation systems through its unique design and functions. In terms of data acquisition, by integrating the communication interface module, the digital input module and the sensor signal acquisition module, it is possible to simultaneously collect multiple types of data, covering analog signals, digital signals and physical quantity signals monitored by various sensors, etc., to provide the system with a more comprehensive and rich data source, so as to more accurately reflect the actual state of the industrial production process or automation system. In particular, in terms of sensor signal acquisition, firstly, through the synergistic effect of the signal mixing unit and the power frequency suppression unit, the power frequency noise is effectively suppressed, and the purity and reliability of the signal are significantly improved. Secondly, the reference unit in the sensor signal acquisition module ensures the consistency of the data acquisition of each sensor signal, and improves the precision and accuracy of the system's multi-channel sensor signal fusion processing.

[0083] In addition, the main control module adopts FPGA+DSP architecture, which gives full play to the parallel processing and logic control capabilities of FPGA and the powerful computing and analysis capabilities of DSP. The two work together to efficiently process multi-source heterogeneous data, improve the system's real-time response performance and data processing accuracy, and can accurately analyze and make decisions on the system's operating status. In terms of control output, it provides a variety of control methods, realizes precise control of the actuator, and improves the control accuracy and flexibility of the system.

[0084] 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. A comprehensive control system for multi-channel information fusion, characterized in that: include: Communication interface module, used for data communication between the system and external devices; Digital input module, used to receive digital signals from the outside and convert them into a data format recognizable by the system; The sensor signal acquisition module is used to collect signal data from multiple different sensors and perform pre-processing; A main control module, used to receive data from the communication interface module, the digital input module and the sensor signal acquisition module, and perform comprehensive analysis and processing; as well as A control output module, used to control the action of the actuator according to the instructions of the main control module; Wherein, the sensor signal acquisition module specifically includes: A signal mixing unit, used for generating a local oscillator signal, and mixing the local oscillator signal with the output signal of the sensor; A power frequency suppression unit, used to filter out power frequency noise from the mixed signal; The reference unit is used to provide a reference signal to calibrate and standardize the entire signal acquisition work to achieve consistency in the sensor signal data acquisition.

2. According to claim 1, a comprehensive control system for multi-channel information fusion is characterized in that: The signal mixing unit includes an operational amplifier U1 and a local oscillator signal generating network, and the local oscillator signal generating network includes an adjustable resistor RP1 and an adjustable resistor RP2, one end of the adjustable resistor RP1 is connected to the resistor R2 and one end of the capacitor C3, the other end of the adjustable resistor RP1 is connected to the other end of the capacitor C3 and one end of the resistor R3, the adjustment end of the adjustable resistor RP1 is connected to the inverting input end of the operational amplifier U1 through the capacitor C4, and one end of the adjustable resistor RP2 is connected to the resistor R1, the capacitor C1, one end of the capacitor C5 and the resistor R2. At the other end, the other end of the adjustable resistor RP2 is connected to the other end of the capacitor C5 and one end of the resistor R4. The adjustment end of the adjustable resistor RP2 is connected to the inverting input end of the operational amplifier U1 through the capacitor C6. The inverting input end of the operational amplifier U1 is also connected to the other end of the resistor R1 through the capacitor C2. The other end of the capacitor C1 is connected to the sensor signal output port. The other ends of the resistors R3 and R4 are connected to the output end of the operational amplifier U1. The non-inverting input end of the operational amplifier U1 is connected to the reference unit and is grounded through the parallel resistor R5 and the capacitor C7.

3. According to claim 2, a comprehensive control system for multi-channel information fusion is characterized in that: The power frequency suppression unit comprises: The power frequency notch filter adopts a band-stop filter structure. When the mixed signal passes through the power frequency notch filter, the power frequency noise will be significantly attenuated, while the useful signals of other frequencies remain relatively unchanged; A depth regulator is used to sample and feedback the output signal of the power frequency notch filter to adjust the filtering depth of the power frequency notch filter.

4. According to claim 3, a comprehensive control system for multi-channel information fusion is characterized in that: The power frequency trap includes an op amp U2 and a double-T trap network, and the double-T trap network includes resistors R6, R7, R8 and capacitors C8, C9 and C10. One end of the resistor R7 and the capacitor C8 is connected to the output end of the op amp U1, the other end of the resistor R7 is connected to one end of the resistor R8 and the capacitor C10, the other end of the capacitor C8 is connected to one end of the resistor R6 and the capacitor C9, the other end of the resistor R8 and the capacitor C9 is connected to the inverting input end of the op amp U2, the other end of the resistor R6 is connected to the output end of the op amp U2, one end of the resistor R11 and the input end of the depth regulator, the other end of the capacitor C10 is connected to the output end of the depth regulator, the in-phase input end of the op amp U2 is grounded through the resistor R9, and is connected to the output end of the op amp U2 through the resistor R10, and the other end of the resistor R11 is connected to the main control module through the capacitor C11.

5. According to claim 4, a comprehensive control system for multi-channel information fusion is characterized in that: The depth regulator includes an adjustable resistor RP3, an operational amplifier U3 and a transistor Q1, one end of the adjustable resistor RP3 and the adjustment end are connected to the output end of the operational amplifier U2, the other end of the adjustable resistor RP3 is connected to the inverting input end of the operational amplifier U3 and is grounded through a resistor R12, the non-inverting input end of the operational amplifier U3 is connected to the reference unit and is grounded through a resistor R13, the output end of the operational amplifier U3 is connected to the other end of the capacitor C10 and the emitter of the transistor Q1, and the base and collector of the transistor Q1 are grounded.

6. The integrated control system for multi-channel information fusion according to claim 5, characterized in that: The reference unit includes a power supply VCC, which is connected to a capacitor C12, one end of a resistor R14 and a non-inverting input terminal of an amplifier U1 through a resistor R15, the other end of the capacitor C12 is grounded, and the other end of the resistor R14 is connected to the non-inverting input terminal of an amplifier U3.

7. The integrated control system for multi-channel information fusion according to claim 1, characterized in that: The communication interface module comprises: RS422 / RS485 communication chip, used to realize serial communication with external devices; USB port for data transfer with a computer or other USB compatible devices; Ethernet interface, used for network communication, supports remote data transmission and control.

8. The integrated control system for multi-channel information fusion according to claim 1, characterized in that: The digital input module comprises: Optoelectronic isolation chip, used to isolate external signals from the system's internal circuits and protect the system from voltage shocks; Signal buffer, used to temporarily store and buffer digital signals from the outside to ensure that the signals will not be lost or deformed during transmission; The logic gate circuit is used to convert the digital signal into a data format recognizable by the main control module.

9. A comprehensive control system for multi-channel information fusion according to any one of claims 1 to 8, characterized in that: The main control module adopts FPGA+DSP architecture, the FPGA is used for data processing and logic control, and the DSP is used for data calculation and analysis.

10. The integrated control system for multi-channel information fusion according to claim 9, characterized in that: The control output module comprises: A digital / analog converter, used to convert the digital signal output by the main control module into an analog signal so as to control the analog actuator; A pulse width modulation generator for generating a pulse signal with a variable duty cycle to control the power or speed of an actuator; The relay drive circuit is used to drive the relay to realize the control of the switch actuator.

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