Adaptive intelligent current source output control system

Abstract

The invention belongs to the technical field of current source control, and particularly relates to a self-adaptive intelligent current source output control system, and the system works cooperatively through a plurality of modules: a load detection module monitors the load access state in real time, converts a current signal into a voltage signal Udetect, and outputs the voltage signal Udetect; the state stabilization filtering module receives the signal, filters high-frequency noise through an RC low-pass filtering unit, amplifies the signal through an in-phase proportion amplification unit, and is internally provided with a signal monitoring and judging unit to extract a load characteristic signal INPUTIDE in a stable working state; the feedback calculation module generates a feedback control parameter through preset threshold comparison and logical operation according to the INPUTIDE; the analog switch control module selects a resistance potential-divider network input channel according to the feedback control parameters, and outputs a current source regulation and control signal VC; and the adjustable current source module outputs a working current adaptive to the load according to the VC. The self-adaptive intelligent current source output control system is superior to a traditional system in dynamic adaptation, protection mechanism, multi-scene adaptation, precision and stability.

Description

Technical Field

[0001] The present invention belongs to the technical field of current source control, and in particular relates to an adaptive intelligent current source output control system. Background Art

[0002] With the rapid development of intelligent industry, medical equipment, and communication technology, current sources, as core power supply units, have a performance that directly affects the stability and accuracy of terminal equipment. Traditional current source control systems primarily use control algorithms based on fixed parameters. Their control logic relies on prior assumptions about the load model and is unable to perceive changes in load impedance, nonlinear characteristics, or sudden changes in operating conditions in real time. Specific limitations are as follows:

[0003] Insufficient dynamic adaptability: Traditional control strategies use fixed parameter designs. When the load exhibits high-frequency dynamic changes or nonlinear characteristics, the system has difficulty adjusting the output characteristics quickly, resulting in increased output current ripple and long response delays, which cannot meet the stringent requirements of precision instruments for current stability.

[0004] Protection mechanisms are disconnected from control logic: Existing systems rely primarily on hardware circuits for overcurrent and overvoltage protection, lacking coordination between protection actions and control algorithms. For example, when a load momentarily shorts and causes a current surge, hardware protection can quickly cut off output. However, this lacks load state prediction and control parameter adjustments, potentially leading to false triggering or protection blind spots. Furthermore, traditional systems require manual reset after recovering from an abnormal state and are unable to autonomously identify load recovery and adaptively restart. This results in extended system downtime and impacts the continuous operation of industrial production lines.

[0005] Weak adaptability across multiple scenarios: Different application scenarios have significantly different requirements for the dynamic performance of current sources: Industrial motor drives require strong anti-interference capabilities and fast current limiting response, medical equipment requires ultra-low noise output, and communication base station backup power supplies must balance wide load regulation with high-efficiency conversion. Traditional current sources achieve multi-mode operation through hardware circuits or segmented switching of control parameters, but their switching logic is rigid and cannot be optimized through real-time learning algorithms, resulting in performance degradation when adapting across scenarios. Summary of the Invention

[0006] The purpose of this invention is to break through the limitations of traditional fixed parameter control and hardware protection by constructing a closed-loop system of "real-time perception of load status - dynamic adjustment of intelligent algorithm - deep integration of protection mechanism", that is, an adaptive intelligent current source output control system.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An adaptive intelligent current source output control system includes: a load detection module for detecting the access status of the load, converting the detected current signal into a voltage signal U_detect and outputting it. A state stability filtering module, electrically connected to the load detection module, receiving the voltage signal U_detect, filtering and amplifying it, and extracting the load characteristic signal INPUT_IDE under the stable working state. A feedback calculation module, electrically connected to the state stability filtering module, receiving the characteristic signal INPUT_IDE, and generating feedback control parameters through preset threshold comparison and logical operation. An analog switch control module, electrically connected to the feedback calculation module, selecting the input channel of the resistor divider network according to the feedback control parameters, and outputting a current source control signal VC. An adjustable current source module, electrically connected to the analog switch control module, outputting a working current adapted to the load according to the control signal VC.

[0009] Preferably, the state-stable filtering module includes: an RC low-pass filtering unit, used to filter out high-frequency noise in the voltage signal U_detect, and having a filtering cutoff frequency of 10 Hz; an in-phase proportional amplification unit, connected to the RC low-pass filtering unit, used to amplify the filtered signal by 20 times.

[0010] Preferably, the feedback calculation module includes: a voltage comparison unit, which includes two operational amplifiers, is provided with an access threshold voltage and a removal threshold voltage, compares the characteristic signal INPUT_IDE with the threshold voltage, and outputs an ADD signal or a MINUS signal accordingly; a calculation chip unit, connected to the voltage comparison unit, receives the ADD signal or the MINUS signal, and generates a three-bit binary adjustment signal S0S1S2 through a preset logic algorithm.

[0011] Preferably, the voltage comparison unit further includes: an input filter circuit connected to the input of the voltage comparison unit for filtering out high-frequency noise in the characteristic signal INPUT_IDE; a voltage divider circuit including three series-connected voltage divider resistors connected to two operational amplifiers, and in conjunction with capacitor C3 to achieve stable threshold voltage division; and a power supply decoupling circuit disposed at each power supply access point in the voltage comparison unit for suppressing power supply noise interference.

[0012] Preferably, the analog switch control module includes a resistor divider network consisting of a plurality of voltage divider resistors connected in series, wherein the first resistor is connected to the power supply and the last resistor is grounded, forming a multi-level voltage divider node. A switch chip U8 has address selection pins A0, A1, and A2 that receive the three-bit binary adjustment signal S0S1S2, select a voltage divider node based on the signal, and output a corresponding control signal VC.

[0013] Preferably, the adjustable current source module includes a two-stage operational amplifier circuit: in the first-stage operational amplifier circuit, the non-inverting input of the operational amplifier U1 receives the control signal VC, the inverting input is grounded via resistor R15, and the output is fed back to the inverting input via resistor R16, forming a voltage follower amplifier structure. In the second-stage operational amplifier circuit, the inverting input and output of the second operational amplifier U2 are connected to the non-inverting input of the first operational amplifier via resistor R18, achieving stable control of the current output, and the output current IOUT and the control signal VC satisfy the linear relationship of IOUT = 4×VC.

[0014] Preferably, the control system also includes: a communication interface module for interacting with a host computer or a monitoring and control system, receiving control instructions and uploading load working status and current output parameters; a power management module for providing a stable power supply for each functional module and suppressing power supply noise through decoupling capacitors.

[0015] Preferably, the preset logic algorithm of the computing chip unit includes: setting an initial three-bit binary adjustment signal S2S1S0 = 001 during initialization, corresponding to outputting a 4mA reference current. When an ADD signal is received, the current value of the three-bit binary adjustment signal is increased by 1; when a MINUS signal is received, the current value of the three-bit binary adjustment signal is decreased by 1.

[0016] Beneficial effects of the present invention:

[0017] 1) Enhanced dynamic adaptability: Traditional systems use fixed parameter designs and are unable to cope with high-frequency dynamic changes or nonlinear characteristics of the load, resulting in large output current ripple and long response delay. The present invention, by constructing a closed-loop system of "real-time perception of load status - dynamic adjustment of intelligent algorithms - deep integration of protection mechanisms", can automatically detect the load access status and adjust the output current in real time. For example, the load detection module monitors the load access status in real time and converts the signal, the feedback calculation module generates feedback control parameters based on the load characteristic signal, and the analog switch control module and the adjustable current source module adjust the output current accordingly. It is suitable for loads of different types and impedances, including nonlinear loads and dynamically changing loads, and meets the stringent requirements of precision instruments for current stability.

[0018] 2) Integration of protection mechanism and control logic: The overcurrent and overvoltage protection of existing systems mainly rely on hardware circuits. The protection action and the control algorithm lack coordination, which may cause false triggering or protection blind spots, and manual reset is required after the abnormal state is restored. In the system of the present invention, the protection mechanism is deeply integrated into the entire control logic. When the load state changes, the feedback calculation module can generate control parameters according to the preset logic algorithm to adjust the output current and avoid abnormal situations. At the same time, the system can autonomously identify the load recovery state and adaptively restart without manual intervention, reducing system downtime and ensuring the continuous operation of the industrial production line.

[0019] 3) Improved multi-scenario adaptability: Traditional current sources achieve multi-mode operation through segmented switching of hardware circuits or control parameters, but their switching logic is rigid and cannot be optimized through real-time learning algorithms, resulting in performance degradation during cross-scenario adaptation. The system of the present invention has intelligent control capabilities, and the feedback calculation module can generate control parameters according to preset control strategies (such as adaptive algorithms, optimization algorithms, etc.) to achieve intelligent adaptive adjustment of the system. The communication interface module can also interact with the host computer or monitoring and control system for data, receive control instructions and upload load working status and current output parameters, and flexibly adjust according to the needs of different application scenarios, thereby improving multi-scenario adaptability and meeting the requirements of different scenarios such as industrial motor drives, medical equipment, and communication base station backup power supplies for the dynamic performance of current sources.

[0020] 4) High-Precision Control: This invention utilizes a state-stabilization filter module to filter and amplify the load detection signal, extracting the load characteristic signal under stable operating conditions and providing a stable and accurate signal for feedback calculation. The feedback calculation module generates feedback control parameters through preset threshold comparisons and logical operations. The analog switch control module selects the input channel of the resistor divider network based on the feedback control parameters, achieving precise current control and meeting the requirements of high-precision application scenarios such as powering precision instruments and sensors.

[0021] 5) High Stability: Built-in filtering and stable state detection mechanisms effectively suppress noise and transient interference. The RC low-pass filter in the stable state filter module filters out high-frequency noise, the in-phase proportional amplifier amplifies the signal, and the built-in signal monitoring and judgment unit determines whether the load has entered a stable operating state, ensuring that subsequent feedback control is based on stable and reliable signals. The input filter circuit, voltage divider circuit, and power supply decoupling circuit in the voltage comparison unit further suppress noise interference, improve system stability, and ensure stable operation in complex electromagnetic environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a working principle block diagram of an adaptive intelligent current source output control system;

[0023] Figure 2 This is the working principle diagram of the load detection module;

[0024] Figure 3 This is a schematic diagram of a state-stable filtering module;

[0025] Figure 4 is a schematic diagram of a voltage comparison unit;

[0026] Figure 5 It is a schematic diagram of an analog switch control module;

[0027] Figure 6 The schematic diagram of an adjustable current source module. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0029] Therefore, the following detailed description of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0030] Example 1

[0031] This embodiment discloses an adaptive intelligent current source output control system, as a preferred embodiment of the present invention, such as Figure 1 As shown, it includes a load detection module, a state stabilization filtering module, a feedback calculation module, an analog switch control module and an adjustable current source module.

[0032] The core function of the load detection module is to monitor the load's connection status in real time and convert the current signal reflecting the load's operating status into a voltage signal (U_detect) for subsequent processing and output. Its operating principle is based on the circuit's conduction characteristics: when the load is not connected, the circuit is in an open state, and no current flows through the detection loop. When the load is connected, the circuit conducts, and the detection loop generates a current signal related to the load's operating status.

[0033] In specific implementation, the module incorporates a high-precision current sensor (such as a Hall effect current sensor or sampling resistor). Taking the sampling resistor as an example, the detected load current I is converted into a voltage signal, U_detect, according to Ohm's law: U = I × R (where U is voltage, I is current, and R is the resistance of the sampling resistor). The selection of the sampling resistor requires a comprehensive consideration of the load current range and the accuracy requirements of subsequent signal processing. This ensures that U_detect falls within the appropriate voltage range within the load's normal operating current range, avoiding both detection errors caused by undersized signals and excessive signals that exceed the input range of subsequent modules.

[0034] The voltage signal U_detect output from the load detection module inevitably contains various noise interferences (such as electromagnetic interference, power supply ripple, etc.), which will affect the accuracy of subsequent signal processing. The state stability filtering module uses one or more filter circuits (such as RC low-pass filters, band-pass filters or active filters) to filter U_detect. Taking the RC low-pass filter as an example, it presents high impedance to high-frequency noise signals and low impedance to low-frequency useful signals through the combination of resistor R and capacitor C, thereby filtering out high-frequency noise and retaining low-frequency signals that reflect the stable working state of the load. The cutoff frequency of the filter circuit is optimized according to the operating characteristics of the load and the noise frequency range to ensure that important signal characteristics are not lost while effectively suppressing noise.

[0035] The signal after filtering may have a small amplitude. In order to meet the input requirements of the subsequent feedback calculation module, it needs to be amplified. The state-stable filter module uses a high-gain, low-noise operational amplifier to form an amplification circuit. By reasonably setting the ratio of the feedback resistor and the input resistor, the filtered signal is amplified to a suitable amplitude. In addition, transient responses (such as surge current, voltage spikes, etc.) may be generated at the moment the load is connected, resulting in signal instability. The state-stable filter module has a built-in signal monitoring and judgment unit, which continuously monitors the fluctuation amplitude and change rate of the signal to determine whether the load has entered a stable working state. When the fluctuation amplitude of the signal within the preset time is less than the set threshold, the load is considered to be in a stable working state. At this time, the corresponding load characteristic signal INPUT_IDE is extracted to ensure that subsequent feedback control is based on a stable and reliable signal.

[0036] The feedback calculation module is the control core of the entire system. Its main function is to generate feedback control parameters based on the received characteristic signal INPUT_IDE through preset threshold comparison and logical operations. The threshold comparison unit has built-in corresponding preset thresholds, which are set according to the rated operating current of the load, the safe operating range, and the control accuracy requirements of the system. When the characteristic signal INPUT_IDE is input to the threshold comparison unit, it is compared with the preset threshold and outputs the corresponding high and low level signals (logical 1 or logical 0). The logical operation unit performs logical operations based on these high and low level signals and, combined with the system's control strategy, generates feedback control parameters containing information such as the current adjustment direction and adjustment amplitude.

[0037] The analog switch control module selects the input channel of the resistor divider network based on the feedback control parameters generated by the feedback calculation module, thereby outputting the current source control signal VC. The resistor divider network consists of multiple precision resistors of different values, each corresponding to a specific current control level. An analog switch (such as a multiplexer) serves as the channel selection device, with its input connected to each output of the resistor divider network and its output connected to the adjustable current source module.

[0038] Feedback control parameters are input to the analog switch control module in the form of digital signals (such as binary code). This module converts the digital signals into analog switch control signals through a decoding circuit and selects the corresponding resistor divider channel. This multi-channel selection mechanism, implemented through the resistor divider network and analog switches, enables precise control of the current source to meet the current accuracy requirements of different loads.

[0039] The adjustable current source module is the system's execution unit. It outputs an operating current tailored to the load based on the control signal VC output by the analog switch control module. This module typically utilizes power electronic devices (such as transistors, field-effect transistors, and operational amplifiers) to form an adjustable current source circuit. Its core principle is to dynamically adjust the output current by using the control signal VC to alter the circuit's reference voltage or adjust the conduction level of the power devices. Taking an operational amplifier-based adjustable current source as an example, the control signal VC serves as the reference voltage input to the op amp's non-inverting input, while the inverting input is connected to a sampling resistor (for detecting the output current), forming a negative feedback closed-loop control. When VC increases, the op amp's output voltage rises, increasing the conduction level of the power devices and the output current. Conversely, when VC decreases, the output current decreases. Through this closed-loop feedback mechanism, the adjustable current source module can respond in real time to changes in the control signal VC, rapidly adjusting the output current to consistently match the load's operating requirements, achieving adaptive intelligent control.

[0040] In summary, the adaptive intelligent current source output control system proposed in this technical solution has the following technical advantages and application value:

[0041] High adaptability: It can automatically detect the load connection status and adjust the output current in real time. It is suitable for loads of different types and impedances, including nonlinear loads and dynamically changing loads.

[0042] High-precision control: Through technologies such as state-stabilized filtering, threshold comparison, and resistor divider networks, fine-tuning of current is achieved to meet the needs of high-precision application scenarios (such as power supply for precision instruments and sensors).

[0043] High stability: Built-in filtering and stable state detection mechanisms effectively suppress noise and transient interference, ensuring stable operation of the system in complex electromagnetic environments.

[0044] Intelligent control: The feedback calculation module can generate control parameters according to preset control strategies (such as adaptive algorithms, optimization algorithms, etc.), realize intelligent adaptive adjustment of the system, and reduce manual intervention.

[0045] Example 2

[0046] This embodiment discloses an adaptive intelligent current source output control system. As a preferred implementation scheme of the present invention, this embodiment takes the IEPE (Integrated Electronics Piezo-Electric) sensor, which is widely used in the TSI (Turbine Supervisory Instrumentation) field, as an example. In actual applications, due to the real-time monitoring requirements of different scenarios, IEPE sensors need to be temporarily added or removed.

[0047] On this basis, the load detection module can be an internal circuit of the TSI system, such as Figure 1 As shown, the load detection module can be provided with several load (IEPE sensor) access channels as needed, that is, the load detection module has several branches for accessing the load, such as 4 branches provided in this technical solution. Figure 2 As shown in the figure, a 50Ω sense resistor R is connected to the load detection module, and U_detect is the voltage across the sense resistor. Due to the characteristics of a parallel circuit, the voltages in each branch are equal, meaning that U_detect simultaneously reflects the voltages in each branch of the load detection module. Therefore, when a load (IEPE sensor) is connected, the equivalent resistance of the corresponding branch of the load detection module changes (for example, from disconnected to conductive), resulting in changes in the total resistance, total current, internal voltage drop of the power supply, and U_detect of the parallel circuit. Similarly, when a load (IEPE sensor) is removed, the equivalent resistance of the corresponding branch changes again (for example, returning to disconnected), and the total resistance, total current, internal voltage drop of the power supply, and U_detect also change accordingly. Therefore, by monitoring the change in U_detect, it is possible to determine whether a load (IEPE sensor) has been connected or removed, as changes in U_detect directly reflect changes in the current flowing through the sense resistor. This change stems from the impact of the load (IEPE sensor) connection state (connected or removed) on the resistance distribution and current distribution of the entire circuit.

[0048] Example 3

[0049] This embodiment discloses an adaptive intelligent current source output control system. As a preferred embodiment of the present invention, based on Example 1, the state stability filter module includes an RC low-pass filter unit and an in-phase proportional amplifier unit. The RC low-pass filter unit is used to filter out high-frequency noise in the voltage signal U_detect and has a filter cutoff frequency of 10 Hz; the in-phase proportional amplifier unit is connected to the RC low-pass filter unit and is used to amplify the filtered signal by 20 times. Still taking the IEPE sensor widely used in the TSI field as an example, Figure 3 As shown:

[0050] The RC low-pass filter unit includes an RC low-pass filter circuit composed of a resistor R1 and a capacitor C1. The input signal U_detect is connected to the resistor R and the capacitor C1 in sequence, and the other end of the capacitor C1 is grounded. According to signal system theory, the s-domain transfer function of the first-order RC filter is Where H(w) represents the transfer function of the system, w represents the angular frequency, R1 represents the resistance in the RC low-pass filter circuit, C1 represents the capacitance in the RC low-pass filter circuit, and j represents the imaginary unit. In the frequency domain, when the frequency of the input signal is lower than the cutoff frequency, When the frequency is higher than the cutoff frequency, the signal can pass relatively smoothly; however, when the frequency is higher than the cutoff frequency, the signal will be significantly attenuated. Therefore, it is necessary to select a suitable RC combination to meet the filter design parameter requirements. According to engineering practice, the filter cutoff frequency is set to 10Hz. In this implementation, C1 = 1uf and R1 = 15.92kΩ.

[0051] In the in-phase proportional amplifier unit, an in-phase proportional amplifier circuit can be constructed based on the operational amplifier I. The characteristic of the in-phase proportional amplifier circuit is that the in-phase input terminal of the operational amplifier I is connected between the resistor R1 and the capacitor C1, and the inverting input terminal is grounded through the voltage divider resistor R2. The in-phase proportional amplifier circuit performs in-phase amplification on U_detect. According to the virtual short and virtual open characteristics of the operational amplifier I, its amplification gain is In this implementation, R2 = 19kΩ and R3 = 1kΩ, achieving a signal amplification gain of 20. The output of operational amplifier I is connected to the INPUT_IDE signal output node, and the inverting input is connected via feedback resistor R3, forming a negative feedback loop. Negative feedback can improve the performance of the operational amplifier, such as increasing the stability of the gain, reducing nonlinear distortion, and extending the passband.

[0052] In summary, the state-stable filter circuit of this embodiment realizes signal impedance matching, low-pass filtering and signal amplification functions through reasonable circuit design and parameter selection, and provides a stable and accurate signal for subsequent feedback calculation.

[0053] Example 4

[0054] This embodiment discloses an adaptive intelligent current source output control system, which is a preferred implementation scheme of the present invention, that is, based on Example 1, the feedback calculation module includes a voltage comparison unit and a calculation chip unit.

[0055] The voltage comparison unit essentially compares the input signal with a pre-set threshold voltage. Its input receives the INPUT_IDE signal output by the state-stabilized filter circuit. The voltage comparison unit includes two operational amplifiers, wherein there are two threshold voltages, corresponding to different judgment conditions. When the INPUT_IDE signal is higher than one of the threshold voltages, the voltage comparison unit outputs a MINUS signal through one of the output terminals; when the INPUT_IDE signal is lower than the other threshold voltage, the voltage comparison unit outputs an ADD signal through the other output terminal. The setting of these two threshold voltages is determined according to the connection and removal status of the load, reflecting the changing characteristics of the signal when the load is connected or removed. Taking the IEPE sensor, which is widely used in the TSI field, as an example, in the actual IEPE sensor plug-in and unplug application scenario, only one channel of IEPE sensor can be connected or removed at a time, and a detection voltage U_detect is obtained each time the sensor is connected or removed. According to the connection or removal situation, the U_detect voltage situation table can be obtained:

[0056]

[0057] Therefore, the threshold voltage for access is selected to be 3.3V and the threshold voltage for removal is selected to be 4.8V.

[0058] Thus, the input of the voltage comparison unit is electrically connected to the output of the state-stabilizing filter module, and the two outputs of the voltage comparison unit are respectively connected to the computing chip unit, for receiving the INPUT_IDE signal output by the state-stabilizing filter module, performing preliminary judgment and conversion on the INPUT_IDE signal, and converting the continuous analog signal into discrete digital signals (ADD and MINUS signals) based on the threshold voltage input, providing the basis for subsequent processing by the computing chip unit. In this way, the state change of sensor connection or removal can be quickly and accurately identified, providing state feedback for the entire adaptive current source output control circuit.

[0059] The calculation chip unit is electrically connected to the analog switch and receives the MINUS and ADD signals from the voltage comparator unit. It contains pre-programmed logic to calculate changes in the current load connection status based on these two signals. For example, if it receives an ADD signal, the calculation chip unit determines that a new load has been connected and increments the corresponding counter based on a specific rule. If it receives a MINUS signal, it determines that a load has been removed and decrements the counter accordingly. Finally, the count result is converted into a three-bit binary adjustment signal S0S1S2. This three-bit binary adjustment signal S0S1S2 accurately represents the current number of connected sensors or their status, enabling subsequent control of the analog switch circuit.

[0060] Example 5

[0061] This embodiment discloses an adaptive intelligent current source output control system, which is a preferred implementation scheme of the present invention. That is, based on Example 4, in addition to including two operational amplifiers, the voltage comparison unit also includes an input filter circuit, a voltage divider circuit and a power supply decoupling circuit.

[0062] Take the IEPE sensor, which is widely used in the TSI field, as an example:

[0063] The input filter circuit is connected to the input terminal of the voltage comparison unit and is used to filter out high-frequency noise in the characteristic signal INPUT_IDE. Figure 4 As shown, the input filter circuit includes an RC filter composed of a resistor R4 and a capacitor C2. The INPUT_IDE signal is connected to the resistor R4 and the capacitor C2 in sequence, and the other end of the capacitor C2 is grounded. According to signal system theory, the s-domain transfer function of the first-order RC filter is In the frequency domain, when the frequency of the input signal is lower than the cutoff frequency When the frequency is higher than the cutoff frequency, the signal can pass relatively smoothly; however, when the frequency is higher than the cutoff frequency, the signal is significantly attenuated. Therefore, in this embodiment, R4 = 4.99kΩ and C2 = 0.1uF. The main function of the input filter circuit is to filter out high-frequency noise in the INPUT_IDE signal. In actual applications, the INPUT_IDE signal may be subject to various high-frequency interferences, such as electromagnetic interference and switching noise. The input filter circuit can filter out these high-frequency interference signals, retaining only the low-frequency valid signal, preventing the high-frequency noise from affecting the subsequent voltage comparison process and improving the accuracy of the comparison results.

[0064] Voltage divider circuit: The 5V power supply is connected to ground through a voltage divider circuit consisting of resistors R5, R6, and R7 in series. Resistor R7 is connected in parallel with capacitor C3. According to the voltage divider principle of a series circuit, the voltage across each resistor is proportional to its value. Different resistors produce different voltages, which serve as reference voltages for comparison by the operational amplifier. Capacitor C3, connected in parallel with resistor R7, filters and stabilizes the voltage. Capacitor C3 stores charge, and when the voltage fluctuates, the capacitor charges and discharges to stabilize the voltage. The voltage divider circuit provides reference voltages for operational amplifiers A and B. By properly selecting the resistance values ​​of resistors R5, R6, and R7, two different reference voltages can be generated, one for determining whether the INPUT_IDE signal is below a certain threshold (corresponding to the ADD signal) and the other for determining whether it is above a certain threshold (corresponding to the MINUS signal).

[0065] Operational amplifier A: Its inverting input is connected between resistor R4 and capacitor C2 and receives the filtered INPUT_IDE signal. Its non-inverting input is connected between resistors R5 and R6 and receives a reference voltage (e.g., 4.8V) provided by a voltage divider circuit. Operational amplifier A compares the two input signals. The output of the operational amplifier is connected to the MINUS signal output node and to the digital power supply DVDD via resistor R8. When the INPUT_IDE signal at the inverting input is higher than the reference voltage (e.g., 4.8V) at the non-inverting input, the output of operational amplifier A outputs a high level (achieved by connecting the digital power supply DVDD via resistor R8), indicating that the load (IEPE sensor) has been removed.

[0066] Operational amplifier B: Its inverting input is connected between resistors R6 and R7, receiving a second reference voltage (e.g., 3.3V) provided by the voltage divider circuit. Its non-inverting input is connected between resistor R4 and capacitor C2, receiving the filtered INPUT_IDE signal. Its output is connected to the ADD signal output node and is also connected to the digital power supply DVDD via resistor R9. Operational amplifier B compares the INPUT_IDE signal with the reference voltage (e.g., 3.3V). When the INPUT_IDE signal is lower than the reference voltage (e.g., 3.3V), the output outputs a high level, which is the ADD signal, indicating the presence of a load (IEPE sensor).

[0067] Power supply decoupling circuits play a vital role in electronic systems. They are primarily used to remove noise and interference from the power supply, ensuring that each circuit module receives a stable, clean power supply. The power supply decoupling circuit of this technical solution includes capacitors C4, C5, C6, and C7.

[0068] One end of capacitor C4 is grounded, and the other end is connected between the 5V power supply and resistor R5. In a power supply system, various high-frequency noise and interference may exist on the power line. This noise may come from fluctuations in the power supply itself, coupling from other circuit modules, and so on. Capacitors have the characteristic of passing high frequencies and blocking low frequencies. For high-frequency noise signals, capacitor C4 acts as a short circuit, bypassing the high-frequency noise to ground, thereby reducing its impact on the voltage divider circuit. By removing high-frequency noise from the 5V power supply, the voltage divider circuit can accurately distribute the voltage according to the resistance values ​​of resistors R5, R6, and R7, providing a stable and accurate reference voltage for operational amplifiers A and B, thereby improving the stability and accuracy of the voltage comparison circuit.

[0069] The power supply pin of operational amplifier A is grounded through capacitor C6. During operation, components such as the transistor within operational amplifier A generate current fluctuations, which can cause voltage fluctuations on the power supply line. Capacitor C6, acting as a decoupling capacitor, can quickly supply or absorb charge when the current demand of operational amplifier A changes, thereby stabilizing the voltage at the power supply pin. When the current of operational amplifier A increases, capacitor C6 discharges, replenishing the current; when the current decreases, capacitor C6 charges, storing excess charge. A stable power supply is crucial for the proper operation of an operational amplifier. It reduces the impact of power supply fluctuations on the performance of the operational amplifier, such as preventing output signal distortion and improving gain stability. This ensures that operational amplifier A can accurately compare the input signal with the reference voltage and output a reliable MINUS signal.

[0070] The non-inverting input of operational amplifier A is grounded via capacitor C5. From an AC coupling perspective, the capacitor blocks DC and passes AC. This blocks any DC bias present at the non-inverting input, allowing only the AC component of the input signal to reach the non-inverting input of operational amplifier A through the capacitor. Regarding filtering, capacitor C5 reduces the capacitive reactance of stray AC signals above a certain frequency, bypassing these high-frequency spurious signals to ground. For example, if high-frequency electromagnetic interference enters the non-inverting input circuit, capacitor C5 allows the interfering signal to be discharged through the ground path, preventing it from affecting the normal operation of operational amplifier A. In summary, the function of capacitor C5 is to improve the input signal quality of operational amplifier A and remove unnecessary DC components and high-frequency spurious signals. A DC bias at the non-inverting input can cause the operational amplifier's operating point to shift, affecting its linear amplification range and comparison accuracy. High-frequency spurious signals can also cause operational amplifier A to misjudge and output an erroneous MINUS signal. The DC isolation and filtering effects of capacitor C5 allow operational amplifier A to more accurately compare the input signal with the reference voltage, thereby more reliably outputting a MINUS signal representing the IEPE sensor status, thereby improving the stability and accuracy of the entire adaptive current source output control circuit.

[0071] The power pin of operational amplifier B is grounded via capacitor C7. Similarly, the capacitor's charge and discharge characteristics stabilize the voltage at its power pin when the current demand of operational amplifier B changes, reducing the impact of power supply fluctuations on its operation. This stable power supply enables operational amplifier B to accurately compare the input signal with the reference voltage and output a reliable ADD signal, thereby providing accurate IEPE sensor connection or removal status information to the subsequent computing chip.

[0072] In summary, the voltage comparison circuit of this technical solution, through input filtering, voltage division, operational amplification, and processing, can accurately output MINUS and ADD signals based on the comparison result of the INPUT_IDE signal with a preset threshold. This provides the subsequent computing chip with sensor access or removal status information, thereby facilitating the control of the adaptive current source output. Furthermore, the power supply decoupling circuit effectively removes noise and interference from the power supply through capacitors C4, C5, C6, and C7, providing a stable and pure power supply for the voltage divider circuit and operational amplifier in the voltage comparison circuit, improving the stability and reliability of the entire voltage comparison circuit, thereby ensuring that the adaptive current source output control circuit can accurately adjust accordingly based on the access and removal status of the IEPE sensor.

[0073] Example 6

[0074] This embodiment discloses an adaptive intelligent current source output control system, which is a preferred implementation scheme of the present invention, that is, based on Example 4 or 5, and its analog switch control module includes a resistor divider network and a switch chip U8.

[0075] The resistor voltage divider network is composed of several voltage divider resistors connected in series, where the first resistor is connected to the power supply and the terminal resistor is grounded, forming a multi-level voltage divider node. Figure 5 As shown, the resistor voltage divider network includes resistors R10, R11, R12, R13 and R14 connected in series, and resistor R14 is connected to a +5V power supply, and resistor R10 is grounded. According to the voltage divider principle of the series circuit, in the series circuit, the voltage on each resistor is proportional to the resistance value of the resistor. Since the current passing through each resistor is equal, different voltage values ​​will be generated on different resistors. By reasonably selecting the resistance value of each resistor, a series of different voltage divider values ​​can be obtained. These voltage divider values ​​will serve as input signals for the switch chip U8, providing the switch chip U8 with multiple different voltage input options. According to the access status of the load (IEPE sensor), the computing chip unit will control the switch chip U8 to select different input channels, thereby selecting different voltage divider values ​​as outputs, so as to adjust the current source control signal VC, thereby adapting to the power supply requirements of different numbers of loads (IEPE sensors).

[0076] Pin Y4 of switch chip U8 is connected between the +5V power supply and resistor R14, pin Y3 is connected between resistors R14 and R13, pin Y2 is connected between resistors R13 and R12, pin Y1 is connected between resistors R12 and R11, and pin Y0 is connected between resistors R11 and R10. Pins Y4-Y0 serve as input channels for switch chip U8, corresponding to different voltage divider points in the resistor divider network. By selecting different pins as inputs, different voltage divider values ​​can be selected for output.

[0077] The positive power pin VDD of switch chip U8 is connected to a +5V power supply, and the negative power pin VEE is connected to a -5V power supply. This provides the power necessary for normal operation of switch chip U8. The positive and negative power supply settings ensure stable operation of the switch chip in different operating modes, especially in circuits that process both positive and negative voltage signals.

[0078] Ground pin VSS and enable pin E# are grounded. Ground pin VSS provides a reference ground potential for the chip, ensuring the normal operation of the chip's internal circuits. Grounding enable pin E# enables switch chip U8, putting it into operation.

[0079] Address select pins A0, A1, and A2 are connected to the computing chip unit and are used to select input channels. The computing chip unit outputs corresponding binary-coded signals to these pins based on the connected state of the load (IEPE sensor). For example, A0, A1, and A2 can form a three-digit binary number, with different binary number combinations corresponding to different input channels (Y0-Y4). Specifically, when the computing chip unit receives a MINUS signal, the MINUS function is triggered, subtracting 1 from the current value of S0S1S2 and transmitting the corresponding value to the address select pins A0A1A2 of the switch chip. When the computing chip unit receives an ADD signal, the ADD function is triggered, adding 1 to the current value of S0S1S2 and transmitting the corresponding value to the address select pins A0A1A2 of the switch chip. If the computing chip unit does not receive a signal, the current value is maintained and output. In this way, the computing chip unit can control the switch chip U8 to select the appropriate voltage divider value as the output.

[0080] Pin Z is an output pin connected to the VC signal output node. Switch chip U8 selects the corresponding input channel based on the signal from the address select pin and outputs the voltage divider value of that channel through pin Z as the current source control signal VC to the adjustable current source circuit, thereby adjusting the current source output current.

[0081] To sum up, the analog switch circuit in this technical solution, through the cooperation of the resistor voltage divider network and the switch chip U8, can select a suitable voltage divider value as the current source control signal VC output according to the access status of the load (IEPE sensor), provide an accurate control signal for the adjustable current source circuit, and realize the control of the adaptive current source output.

[0082] Example 7 This embodiment discloses an adaptive intelligent current source output control system, which is a preferred implementation scheme of the present invention, that is, based on any one of Examples 1-6, and its adjustable current source module includes a two-stage operational amplifier circuit: in the first-stage operational amplifier circuit, the non-inverting input terminal of the operational amplifier U1 receives the control signal VC, the inverting input terminal is grounded via resistor R15, and the output terminal is fed back to the inverting input terminal via resistor R16, forming a voltage follower amplifier structure. In the second-stage operational amplifier circuit, the inverting input terminal and the output terminal of the operational amplifier U2 are connected to the non-inverting input terminal of the operational amplifier U1 via resistor R18 to achieve stable control of the current output, and the output current IOUT and the control signal VC satisfy the linear relationship of IOUT=a×VC, where a represents the proportional coefficient. Specifically, the main function of the adjustable current source circuit is to output the corresponding current IOUT according to the input control signal VC to power the load, and can adaptively adjust the output current according to the number of connected sensors. Thus, Figure 6 As shown, the adjustable current source circuit includes an operational amplifier U1 and an operational amplifier U2.

[0083] The power supply pin V+ of operational amplifier U1 is connected to the power supply VCC, providing the operational power required for the operational amplifier and ensuring proper signal processing and amplification. The inverting input -IN is connected to ground via resistor R15, providing a fixed reference potential for subsequent comparison with the signal at the non-inverting input. The input VC signal is connected to the non-inverting input +IN of operational amplifier U1 via resistor R17. The VC signal is a current source control signal from the analog switch circuit. It carries control information determined by the number of connected sensors. Connecting through resistor R17 provides current limiting and impedance matching, ensuring stable signal input to the operational amplifier. The output OUT of operational amplifier U1 is connected to the inverting input -IN via resistor R16, forming a negative feedback loop. Negative feedback stabilizes the gain and output of the operational amplifier, improving circuit stability and linearity. When the output signal changes, a portion of the output signal is fed back to the inverting input via feedback resistor R16 for comparison with the input signal, thereby adjusting the output and making it more stable and accurate.

[0084] The output terminal OUT of operational amplifier U1 is connected to the output node of the current source signal IOUT through resistor R19. Due to the characteristics of the operational amplifier and the principle of negative feedback, the output current IOUT has a certain linear relationship with the input signal VC. By properly selecting the resistance values ​​of resistors R15, R16, R17, and R19, the output current IOUT can be precisely controlled so that it is proportional to the VC signal, thereby adjusting the output current according to the number of connected sensors.

[0085] The power pin V+ of operational amplifier U2 is connected to the power supply VCC, providing operating power for operational amplifier U2. The inverting input -IN and output OUT of operational amplifier U2 are connected to the non-inverting input +IN of operational amplifier U1 via resistor R18. Operational amplifier U2 assists in regulation and compensation. It further processes and adjusts the VC signal input to the non-inverting input of operational amplifier U1, improving signal stability and compensating for potential signal distortion or errors, thereby enhancing the performance and output accuracy of the entire adjustable current source circuit.

[0086] In summary, operational amplifiers U1 and U2 work together to implement the adjustable current source function. Operational amplifier U1 is the core signal processing and amplification unit. Based on the input VC signal and the negative feedback mechanism, it outputs a current IOUT proportional to VC. Operational amplifier U2 optimizes and compensates the input signal, ensuring that operational amplifier U1 can more accurately process the signal. Ultimately, it achieves the goal of adaptively adjusting the output current based on the number of connected sensors, providing a stable and appropriate supply current to the load.

[0087] According to the principle of deep negative feedback, it can be calculated that:

[0088]

[0089] Among them, I out Indicates the output current, A v is the voltage gain, V C is the VC signal voltage, R set Is the set resistance. In this technical solution, the following values ​​can be taken: R 15 =1kΩ,R 16 =4kΩ,A v =4,R set =1kΩ,I out =4×Vc(mA).

[0090] Based on the current supply requirements of the four-channel load, this current source can output currents of 4mA, 8mA, 12mA, 16mA, and 20mA. When no load is connected, the output current is fixed at 4mA. Each additional load increases the output current by 4mA. Thus, this solution dynamically adjusts the supply current by detecting the load insertion status, ensuring that each load receives a stable and sufficient current while avoiding unnecessary energy waste.

[0091] Example 8

[0092] This embodiment discloses an adaptive intelligent current source output control system, which is a preferred implementation scheme of the present invention, that is, based on any one of Examples 1-7, and further includes a communication interface module and a power management module.

[0093] The communication interface module is used to exchange data with the host computer or monitoring and control system, receive control instructions and upload load working status and current output parameters.

[0094] Data interaction architecture and protocol support: The communication interface module serves as a bridge between the system and external devices (host computer or monitoring and control system), enabling bidirectional data interaction. Its hardware integrates multiple communication interface circuits, supporting mainstream industrial communication protocols (such as USB, RS-485, CAN, Modbus, Ethernet, etc.), allowing flexible selection of communication methods based on the application scenario. For example, the RS-485 interface enables long-distance, highly interference-resistant data transmission, suitable for industrial field environments; the USB interface enables convenient connection to a PC, facilitating parameter configuration and real-time monitoring. The interface circuit design includes level conversion chips (such as MAX485, CH340), isolation devices (such as optocouplers), and ESD protection circuits to ensure stable and reliable signal transmission. The isolation design effectively suppresses ground loop interference and protects the system from external electromagnetic noise; the ESD protection circuit prevents damage to the interface caused by electrostatic discharge.

[0095] The control instruction reception and status data upload module receives control instructions (such as current output range setting, operating mode switching, fault reset, etc.) sent by the host computer, converts the instructions into digital signals that can be recognized by the system through the protocol analysis circuit, and transmits them to the feedback calculation module or analog switch control module to realize remote configuration of the system operating parameters. At the same time, the module collects the load operating status (such as the current load current, voltage signal U_detect, stable state flag) and current output parameters (such as control signal VC, current resistor voltage divider channel selection, etc.) in real time, packages them according to the preset data format and uploads them to the host computer, providing real-time data support for remote monitoring and fault diagnosis. The communication process uses a handshake protocol and a verification mechanism (such as CRC verification) to ensure the accuracy and integrity of data transmission. When a data error is detected, the retransmission mechanism is automatically triggered to avoid control deviations caused by data errors.

[0096] The power management module provides stable power to each functional module and suppresses power supply noise through decoupling capacitors.

[0097] Stable Power Supply and Noise Suppression Architecture: The power management module provides stable DC power to each system functional module (load detection module, state stabilization filter module, feedback calculation module, analog switch control module, adjustable current source module, and communication interface module). Its core consists of a power conversion circuit and a noise suppression unit. The input power is compatible with various voltages (such as 12V DC, 24V DC, or 220V AC via an adapter). Using components such as DC-DC converters and low-dropout regulators (LDOs), the input voltage is converted to the required operating voltages (such as 5V, 3.3V, and ±12V) for each module. To address power supply noise, the module connects decoupling capacitors (typically a combination of ceramic and electrolytic capacitors) in parallel at the power input of each functional module. High-frequency decoupling capacitors (0.1μF to 1μF) suppress high-frequency power ripple, while low-frequency decoupling capacitors (10μF to 100μF) filter low-frequency noise, ensuring the stability of the supply voltage for each module. The configuration of decoupling capacitors follows the "proximity principle" and should be as close to the chip power pins as possible to shorten the noise loop and improve the filtering effect.

[0098] Power hierarchical management and energy efficiency optimization: Taking into account the power consumption and operating characteristics of different modules, the power management module adopts a hierarchical power supply strategy: an independent power supply channel is used for the high-power adjustable current source module to prevent its high current operation from interfering with low-power digital circuits (such as the feedback calculation module); a separate regulated power supply is provided for noise-sensitive analog circuits (such as the state-stabilization filter module) to reduce noise coupling in the digital circuits. In addition, the module integrates power monitoring circuitry to monitor the voltage and current of each power supply channel in real time. When overvoltage, undervoltage, or overcurrent anomalies are detected, protection mechanisms are automatically triggered (such as shutting down the power output and sending a fault signal to the communication interface module) to prevent abnormal power conditions from causing damage to the system. In standby mode, energy efficiency is optimized and overall system power consumption is reduced by dynamically adjusting the power output (such as reducing the supply voltage of non-critical modules).

[0099] Thus, this technical solution has the following system workflow and coordination mechanism:

[0100] External command interaction and remote monitoring: When the host computer or monitoring and control system needs to configure parameters or query the status of the current source, it sends control commands through the communication interface module. After the command is parsed by the protocol, if it is a parameter configuration command (such as setting the load rated current threshold), the feedback calculation module updates the preset threshold database; if it is an operating mode switch command (such as switching from automatic mode to manual mode), the analog switch control module switches to the corresponding control logic. At the same time, the system uploads the load operating status and current output parameters through the communication interface module on a scheduled basis or as required by the command. The host computer can display data curves and generate reports in real time through monitoring software, enabling remote visual management of the current source's operating status.

[0101] Power supply anomaly response and protection: When the power management module detects a power supply voltage anomaly (such as an input power outage or output voltage fluctuations exceeding the allowable range), it immediately sends a fault signal to the feedback calculation module. Upon receiving the signal, the feedback calculation module uses the analog switch control module to force the output current of the adjustable current source module back to zero, preventing load damage caused by the abnormal power supply. Simultaneously, the communication interface module uploads the fault information to the host computer, prompting the user to check and repair the power supply. Once the power returns to normal, the system automatically restarts and returns to its pre-fault operating state.

[0102] Example 9

[0103] This embodiment discloses an adaptive intelligent current source output control system. As a preferred embodiment of the present invention, based on any one of Embodiments 1-8, the preset logic algorithm of the computing chip unit includes:

[0104] 1) Initialization: When the system starts, the computing chip performs initialization, setting the three-digit binary adjustment signal S2S1S0 to 001. In the mapping relationship between digital code and current output, this initial value corresponds to a 4mA reference current output. The choice of 4mA as the reference current takes into account the basic current requirements of many load types during startup or low-power operation. This ensures that the system provides a stable and safe starting operating current for the load in its initial state, while also establishing a baseline reference point for subsequent current adjustments.

[0105] 2) ADD signal response mechanism: When the computing chip unit receives the ADD signal, it means that the system needs to increase the output current to adapt to the load change. Under the binary operation rules, the current value of the three-digit binary adjustment signal is increased by 1. For example, if the current adjustment signal is 010, its value becomes 011 after receiving the ADD signal. Each increase in the binary adjustment signal corresponds to a precise current increment according to the pre-set correspondence. This design enables the current regulation process to be carried out in a discrete and controllable manner, avoiding the impact of sudden current changes on the load, while quickly responding to the load's demand for increased current.

[0106] 3) MINUS Signal Response Mechanism: Conversely, when the computing chip receives a MINUS signal, it indicates that the system needs to reduce output current. At this point, the current value of the three-bit binary adjustment signal is subtracted by 1. For example, if the current adjustment signal is 101, upon receiving the MINUS signal, its value becomes 100. Similar to the ADD signal operation, each subtraction operation is closely linked to a precise reduction in current, ensuring that the system output current can be adjusted promptly based on the actual load conditions, maintaining stable load operation.

[0107] The three-bit binary regulation signal S2S1S0 isn't used directly to control the current output, but rather works in conjunction with the analog switch control module. The analog switch control module integrates a decoding circuit that converts the three-bit binary regulation signal into a corresponding control signal, which is used to select different input channels of the resistor divider network. For example, when the regulation signal changes from 001 to 010, the decoding circuit recognizes this change and drives the analog switch to the resistor divider channel corresponding to 010. Different resistor divider channels generate voltage signals of varying amplitudes through different resistor combinations, namely the current source control signal VC, ultimately achieving fine adjustment of the output current of the adjustable current source module.

[0108] The feedback calculation module plays a core decision-making role in the entire system. It continuously receives the sensor characteristic signal INPUT_IDE from the state stabilization filter module and determines the current load operating state and the required current adjustment direction through preset threshold comparison and logical operations. When the feedback calculation module determines that the current needs to be increased, it sends an ADD signal to the computing chip unit; if it determines that the current needs to be decreased, it sends a MINUS signal. In this way, the computing chip unit's logic algorithm is tightly embedded in the system's closed-loop feedback control system, dynamically adjusting the current output based on the real-time load status, ensuring that the system is always in the optimal adaptive operating state.

Claims

1. An adaptive intelligent current source output control system, characterized in that: include: The load detection module is used to detect the connection status of the load, convert the detected current signal into a voltage signal U_detect and output it; a state stability filtering module, electrically connected to the load detection module, receiving the voltage signal U_detect, filtering and amplifying it, and extracting the load characteristic signal INPUT_IDE under a stable working state; A feedback calculation module is electrically connected to the state stabilization filter module, receives the characteristic signal INPUT_IDE, and generates a feedback control parameter through preset threshold comparison and logic operation; an analog switch control module, electrically connected to the feedback calculation module, selecting an input channel of the resistor divider network according to the feedback control parameter, and outputting a current source control signal VC; The adjustable current source module is electrically connected to the analog switch control module and outputs a working current adapted to the load according to the control signal VC.

2. The adaptive intelligent current source output control system according to claim 1, characterized in that: The state stabilization filtering module includes: an RC low-pass filtering unit, which is used to filter out high-frequency noise in the voltage signal U_detect and has a filtering cutoff frequency of 10 Hz; an in-phase proportional amplification unit, which is connected to the RC low-pass filtering unit and is used to amplify the filtered signal by 20 times.

3. The adaptive intelligent current source output control system according to claim 1, characterized in that: The feedback calculation module includes: a voltage comparison unit, which includes two operational amplifiers, is provided with an access threshold voltage and a removal threshold voltage, compares the characteristic signal INPUT_IDE with the threshold voltage, and outputs an ADD signal or a MINUS signal accordingly; a calculation chip unit, connected to the voltage comparison unit, receives the ADD signal or the MINUS signal, and generates a three-bit binary adjustment signal S0S1S2 through a preset logic algorithm.

4. The adaptive intelligent current source output control system according to claim 3, characterized in that: The voltage comparison unit further includes: An input filter circuit is connected to the input terminal of the voltage comparison unit and is used to filter out high-frequency noise in the characteristic signal INPUT_IDE; The voltage divider circuit includes three voltage divider resistors connected in series, connected to two operational amplifiers, and cooperates with capacitor C3 to achieve stable threshold voltage division; The power supply decoupling circuit is arranged at each power supply access point in the voltage comparison unit to suppress power supply noise interference.

5. The adaptive intelligent current source output control system according to claim 3, characterized in that: The analog switch control module includes: The resistor voltage divider network is composed of a number of voltage divider resistors connected in series, wherein the first resistor is connected to the power supply and the terminal resistor is grounded, forming a multi-level voltage divider node as a whole; The switch chip U8 , whose address selection pins A0 , A1 , and A2 receive the three-bit binary regulation signal S0 S1 S2 , selects a voltage dividing node according to the signal, and outputs a corresponding regulation signal VC.

6. The adaptive intelligent current source output control system according to claim 1, characterized in that: The adjustable current source module includes a two-stage operational amplifier circuit: In the first-stage operational amplifier circuit, the non-inverting input terminal of the operational amplifier U1 receives the control signal VC, the inverting input terminal is grounded via the resistor R15, and the output terminal is fed back to the inverting input terminal via the resistor R16, forming a voltage follower amplifier structure; In the secondary operational amplifier circuit, the inverting input and output of the operational amplifier U2 are connected to the non-inverting input of the operational amplifier U1 through a resistor R18 to achieve stable control of the current output. The output current IOUT and the control signal VC satisfy the linear relationship of IOUT=a×VC, where a represents the proportional coefficient.

7. The adaptive intelligent current source output control system according to claim 1, characterized in that: Also includes: Communication interface module, used to exchange data with the host computer or monitoring and control system, receive control instructions and upload load working status and current output parameters; The power management module provides stable power to each functional module and suppresses power supply noise through decoupling capacitors.

8. The adaptive intelligent current source output control system according to claim 1, characterized in that: The preset logic algorithm of the computing chip unit includes: setting the initial three-bit binary adjustment signal S2S1S0=001 during initialization, corresponding to the output of 4mA reference current; when receiving the ADD signal, adding 1 to the current value of the three-bit binary adjustment signal; when receiving the MINUS signal, subtracting 1 from the current value of the three-bit binary adjustment signal.

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