Intelligent wiring terminal equipment integrating multi-parameter detection and state monitoring method

Abstract

The invention relates to the technical field of intelligent monitoring, in particular to intelligent wiring terminal equipment integrating multi-parameter detection and a state monitoring method, and the equipment comprises a main control module, and a voltage measurement module, an infrared temperature measurement module and a pressure detection module which are respectively connected with the main control module; the voltage measurement module is used for attenuating high voltage at the two ends of the metal terminal to a safe range in proportion and transmitting the high voltage to the main control module after impedance isolation; the infrared temperature measurement module is used for detecting the temperature of a metal terminal contact in a non-contact manner and sending the temperature to the main control module; the pressure detection module is used for detecting a pressure signal representing the fastening state of the wire pressing screw; the master control module is used for processing and collaborative analysis of the received voltage, temperature and pressure signals so as to realize comprehensive monitoring and fault early warning of the connection state of the metal terminal. And the main control module carries out cooperative processing on multi-source signals, so that the misjudgment risk of single parameter monitoring is avoided.

Description

Technical Field

[0001] This application relates to the field of intelligent monitoring technology, specifically to an intelligent terminal block device and a status monitoring method that integrates multi-parameter detection. Background Technology

[0002] Terminal blocks, as a core component of electrical connections, serve to stabilize connecting wires and ensure the reliable transmission of current and voltage signals. Traditional terminal blocks use a mechanical combination of a metal conductive sheet and an insulating shell, offering only a single function and lacking any status sensing capability. In actual operation, factors such as increased contact resistance, overcurrent load, loose screws, or electrochemical corrosion between different metals can easily lead to potential hazards such as terminal overheating, poor contact, unstable connections, and wiring errors. Failure to detect and address these issues promptly will accelerate insulation aging, causing signal transmission interruptions and even electrical fires.

[0003] Existing technologies have attempted to improve upon this approach, such as adding temperature sensors to terminal blocks to monitor high temperatures or using pressure sensors to check screw tightness. However, these solutions are limited in function, only addressing specific problems, and typically lack remote data reporting capabilities. They are also complex to install or pose safety hazards. More importantly, they lack the ability to simultaneously collect and collaboratively analyze multiple parameters such as voltage, temperature, and pressure. This prevents comprehensive, intelligent, and real-time monitoring and early warning of the terminal block's operating status, leaving a heavy reliance on periodic manual inspections. This results in high maintenance costs, delayed response times, and an inability to meet the demands of intelligent operation and maintenance in modern power systems. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides an intelligent terminal block device and status monitoring method that integrates multi-parameter detection, enabling real-time monitoring and fault warning of the terminal block's operating status. This solves the problems of traditional terminal blocks, such as inability to automatically detect operating status, lack of data reporting capabilities, low security, and high maintenance costs.

[0005] In a first aspect, the present invention provides an intelligent terminal block device integrating multi-parameter detection, including an insulating shell, metal terminals and wire clamping screws, and also includes a main control module and a voltage measurement module, an infrared temperature measurement module and a pressure detection module respectively connected to the main control module; The voltage measurement module is used to attenuate the high voltage across the metal terminals to a safe range and then transmit it to the main control module after impedance isolation. The infrared temperature measurement module is used for non-contact detection of the temperature of the metal terminal contacts and sends the data to the main control module. The pressure detection module is used to detect pressure signals characterizing the tightness of the wire screw; the pressure detection module includes a resistive strain gauge and a strain force measurement circuit, the resistive strain gauge is attached to the bottom of the metal terminal at the stress position; the resistive strain gauge is connected to a Wheatstone bridge formed by the strain force measurement circuit; the strain force measurement circuit is used to convert the resistance change of the strain gauge into a voltage signal, and after analog-to-digital conversion, it is sent to the main control module; The main control module is used to process and analyze the received voltage, temperature and pressure signals to achieve comprehensive monitoring and fault early warning of the metal terminal connection status.

[0006] By integrating the detection modules for three key physical quantities—voltage, temperature, and pressure—with the main control module into a single terminal block device, this represents a leap from passive connection to active sensing, endowing traditional terminal blocks with real-time status monitoring and preliminary fault diagnosis capabilities. The use of infrared non-contact temperature measurement effectively avoids the electrical safety risks of direct contact temperature measurement on high-voltage live conductors. By monitoring the tightening force of the clamping screws, it can proactively detect screw loosening caused by vibration, thermal expansion and contraction, etc., providing early warning before increased contact resistance and overheating occur, preventing the fault from escalating. Continuous monitoring of the voltage across the terminals can immediately detect anomalies such as overvoltage, undervoltage, and open circuits, ensuring the power supply safety of downstream equipment.

[0007] As a preferred embodiment of the present invention, the strain measurement circuit converts the deformation resistance of the resistive strain gauge into a voltage signal through Kirchhoff's law and a Wheatstone bridge structure, and then converts the voltage signal into a digital pulse signal through a dual-channel pressure converter and sends it to the main control module for processing. The tightness of the wire screw is determined based on the processing result.

[0008] By utilizing Kirchhoff's laws and the Wheatstone bridge structure, the minute resistance changes of the strain gauge are accurately converted into voltage signals. Combined with the analog-to-digital conversion function of the dual-channel pressure converter, quantitative monitoring of the screw tightness is achieved. This solves the problem of the traditional qualitative judgment that relies solely on indicator lights to indicate that the screw is not tightened, and can accurately identify hidden problems such as insufficient tightening force.

[0009] Compared to analog signals, digital pulse signal transmission can effectively resist interference from complex electromagnetic environments such as substations, ensuring the stability of pressure data transmission and avoiding misjudgments caused by signal distortion. Through quantified pressure data, the main control module can directly determine the degree of screw looseness, allowing maintenance personnel to accurately locate fault points without disassembling terminals, significantly improving maintenance efficiency.

[0010] As a preferred embodiment of the technical solution of the present invention, the two resistive strain gauges are a first resistive strain gauge and a second resistive strain gauge, respectively. The two resistance strain gauges are designated as the first resistance strain gauge and the second resistance strain gauge. The strain measurement circuit includes a Wheatstone bridge structure consisting of resistors R11, R12, R13, R14, R15, and R16. One end of the first resistive strain gauge is connected to a second power supply, and the other end is grounded through fuse F4 and resistor R12; one end of resistor R11 is connected to the second power supply, and the other end is grounded through resistor R13; the connection node between the first resistive strain gauge and resistor R12, and the connection node between resistor R11 and resistor R13, constitute the first differential output channel of the Wheatstone bridge structure. One end of the second resistive strain gauge is connected to the second power supply, and the other end is grounded through fuse F6 and resistor R15; one end of resistor R14 is connected to the second power supply, and the other end is grounded through resistor R16; the connection node between the second resistive strain gauge and resistor R15, and the connection node between resistor R14 and resistor R16, constitute the second differential output channel of the Wheatstone bridge structure.

[0011] The two output channels of the Wheatstone bridge structure are respectively connected to the two input channels of the dual-channel pressure converter. The power supply terminal of the dual-channel pressure converter outputs a second power supply through a voltage regulator circuit to power the resistive strain gauge. The output terminal of the dual-channel pressure converter is connected to the main control module. The main control module determines the tightness of the wire clamping screw based on the digital pulse signal output by the dual-channel pressure converter.

[0012] A Wheatstone bridge constructed using two resistive strain gauges forms a dual-channel detection system. This not only allows for mutual verification of data accuracy but also ensures uninterrupted core monitoring functions even in the event of a single strain gauge failure, enhancing equipment redundancy and lifespan. Through a well-designed network of resistors R11-R16 and the two strain gauges, the balance characteristics and signal output amplitude of the Wheatstone bridge are optimized, enabling minute strain changes to be converted into identifiable voltage signals, thus improving monitoring sensitivity compared to a single strain gauge solution. The dual-channel pressure converter's first power supply and voltage regulator circuit outputting a second power supply design provide independent power to both the pressure converter and the strain gauges, avoiding signal drift caused by power supply interference and ensuring long-term stability of pressure measurements.

[0013] As a preferred embodiment of the technical solution of the present invention, the voltage measurement module includes two input channels with identical circuit structures, each of which is adapted to voltage monitoring of different terminals; the output terminals of the two input channels are respectively connected to the main control module. One input channel receives input from the high-voltage signal input interface J6. Input interface J6 is connected to a multi-stage voltage divider circuit via fuse F1. The multi-stage voltage divider circuit includes resistors R6, R7, and R23 connected in series. The connection point of resistors R7 and R23 is connected to the first power supply via resistor R22. The connection point of resistors R23 and R7 is also grounded via filter capacitor C20. The connection point of resistors R6 and R7 is connected to the positive input terminal of a voltage follower. The inverting input terminal of the voltage follower is connected to the output terminal. The power supply terminal of the voltage follower is connected to the first power supply. The positive input terminal of the voltage follower is also grounded via Zener diode D1. The output terminal of the voltage follower is connected to the main control module.

[0014] Two identical input channels can simultaneously monitor voltages at different terminals, expanding the monitoring range without the need for additional modules and adapting to multi-terminal cluster applications. Overcurrent protection from fuse F1, high-voltage attenuation from a multi-stage voltage divider circuit, and electrostatic discharge protection from Zener diode D1 form a triple safety protection system, fully adapting to high-voltage monitoring requirements of DC±220V / AC≤220V and mitigating the risk of high-voltage breakdown.

[0015] The voltage follower design achieves impedance isolation, effectively avoiding the influence of load effects on the voltage division ratio; the filter capacitor C20 filters out high-frequency noise, ensuring the stability of the voltage signal and providing a high-precision data source for subsequent ADC conversion.

[0016] As a preferred embodiment of the technical solution of the present invention, it further includes a communication module and a power supply module. The input end of the communication module is connected to the output end of the main control module, and is used to upload the monitoring data processed by the main control module to the host system. The power supply module provides power to the main control module, voltage measurement module, infrared temperature measurement module, pressure detection module, and communication module, respectively.

[0017] The communication module uploads monitoring data to the host system, solving the problem of traditional terminal data not being remotely accessible. Maintenance personnel can monitor the terminal's operating status in real time through the backend, enabling remote monitoring and fault warnings, further reducing manual maintenance costs. The power module provides centralized power to all functional modules. Through an isolated DC / DC converter design, it ensures the stability and electrical isolation of power supply to each module, avoiding power interference between modules and improving the overall reliability of the equipment.

[0018] The standardized communication interface supports compatibility with different upper-level systems, and the unified power supply architecture facilitates the expansion of subsequent functional modules, adapting to multiple application scenarios such as substations and industrial control cabinets.

[0019] As a preferred embodiment of the technical solution of the present invention, it also includes a dual-color indicator light connected to the main control module, which is used to display the device status or fault information according to the judgment result of the main control module.

[0020] The dual-color indicator lights visually display the equipment's normal operation and fault alarm status, allowing maintenance personnel to quickly determine the terminal's working status without the need for specialized equipment, significantly improving fault identification efficiency. Fault levels can be differentiated by indicator light color (e.g., green for normal, yellow for warning, red for alarm) or flashing frequency, helping maintenance personnel prioritize urgent faults and optimize maintenance processes. Combined with the communication module's remote reporting function, a dual early warning mechanism of local indicator light alerts and remote platform alarms is formed, preventing fault omissions due to the failure of a single early warning method.

[0021] As a preferred embodiment of the technical solution of the present invention, the main control module is used for collaborative analysis and processing of multi-source signals, and the specific process is as follows: The voltage, temperature, and pressure signals are time-aligned and filtered to eliminate noise interference. The processed voltage signal is compared with the preset normal voltage range. If it exceeds the range, it is determined to be an abnormal voltage. The processed temperature signal is compared with a preset temperature alarm threshold. If the threshold is exceeded, it is determined to be an abnormal temperature. The processed pressure signal is analyzed, including: calculating the difference between the current pressure value and the preset qualified fastening pressure reference value; and / or analyzing the changing trend of the pressure signal within a set time window; if the difference exceeds the allowable deviation range or the changing trend shows that the pressure continues to drop, it is determined to be an abnormal pressure. Based on the judgment result, a comprehensive status flag is generated. The flag includes at least three status information: voltage normal / abnormal, temperature normal / abnormal, and pressure normal / abnormal.

[0022] As a preferred embodiment of the technical solution of the present invention, the main control module is further configured to execute predetermined fault logic judgment rules based on the comprehensive status flag, the rules including: a) If only the pressure signal is determined to be abnormal, a screw loosening warning message will be generated, with the warning level being the alert level; b) If the temperature signal is determined to be abnormal, an over-temperature alarm will be generated regardless of the status of other signals, with the warning level being emergency. c) If the voltage signal is determined to be abnormal, a voltage abnormality alarm message is generated, and the warning level is determined according to the type of abnormality; d) If both pressure and temperature signals are abnormal, a combined fault alarm message indicating overheating due to loose connection will be generated, with the warning level being emergency.

[0023] As a preferred embodiment of the technical solution of the present invention, it further includes a slider detection module, the output end of which is connected to the main control module, for detecting the connection or disconnection state of the middle slider of the metal terminal, and transmitting the state signal to the main control module; The triggering mechanism of the slider detection module is mechanically coupled to the moving part of the slider, so that when the slider switches between the connected position and the disconnected position, the state of the electrical contacts of the slider detection module is changed.

[0024] The addition of slider connectivity / disconnection monitoring fills the gap in traditional terminals that only focus on electrical connection parameters and neglect mechanical structure status, enabling comprehensive monitoring of both electrical parameters and mechanical structure. The mechanical coupling design between the trigger mechanism and the slider moving parts directly translates slider state changes into electrical contact state changes, resulting in fast response speed and high accuracy, allowing for real-time capture of anomalies during slider switching. By monitoring the slider state, early warnings can be issued for circuit interruption risks caused by poor slider contact, making it particularly suitable for scenarios requiring frequent circuit switching and improving the reliability of electrical system switching.

[0025] Secondly, the present invention also provides a method for monitoring the status of terminals based on the intelligent terminal block device described in the first aspect, comprising the following steps: S1: The voltage signal across the metal terminals is acquired in real time via the voltage measurement module; S2: The temperature signal of the metal terminal contact is acquired in real time in a non-contact manner through an infrared temperature measurement module; S3: Real-time acquisition of pressure signals characterizing the tightness of the wire clamping screws via the pressure detection module; S4: The main control module receives the voltage signal, temperature signal, and pressure signal, and performs collaborative analysis and processing on the multi-source signals; specifically, it includes: comparing the voltage signal with a preset normal voltage range to determine whether a voltage abnormality has occurred; comparing the temperature signal with a preset temperature threshold to determine whether a temperature abnormality has occurred; and analyzing the changing trend of the pressure signal or comparing it with a preset pressure threshold to determine whether the wire clamping screw is loose or has insufficient tightening force. S5: Based on the analysis and processing results, determine whether the connection status of the metal terminals is abnormal, and generate fault warning information when an abnormality is determined.

[0026] Clearly define the processes for data collection, collaborative analysis, and fault early warning to ensure that the monitoring process is replicable and traceable, avoiding monitoring errors caused by operational differences and guaranteeing the consistency of monitoring results. Real-time data collection and dynamic judgment enable pre-fault warnings, rather than the traditional method of discovering faults after they occur, allowing maintenance personnel time to handle the situation and preventing equipment damage or production interruptions caused by escalating faults.

[0027] As a preferred embodiment of the technical solution of the present invention, S3 specifically includes: Strain is sensed by a resistive strain gauge attached to the bottom of a metal terminal at the stress point. The resistance change of the strain gauge is converted into a voltage signal by a Wheatstone bridge circuit composed of strain force measurement circuit, and then the pressure signal is generated after analog-to-digital conversion.

[0028] By using a Wheatstone bridge for quantization and analog-to-digital conversion, mechanical strain is transformed into a digital pressure signal, avoiding the ambiguity of qualitative judgments. This makes the monitoring data of screw tightening status quantifiable and comparable, providing data support for fault analysis. The strain gauge is attached to the bottom of the metal terminal at the stress position, directly sensing changes in screw tightening force. It is unaffected by the external environment, suitable for complex working conditions such as outdoor and high-temperature environments, and ensures long-term stability of pressure acquisition.

[0029] As a preferred embodiment of the technical solution of the present invention, in S5, when at least one of the voltage signal, temperature signal and pressure signal is judged to be abnormal, fault warning information is generated; the fault warning information includes at least the abnormality type and / or abnormality level.

[0030] The system employs a logic of issuing an alert for at least one anomaly, ensuring that any single parameter anomaly is detected promptly, avoiding missed faults caused by requiring multiple parameters to be abnormal before issuing an alert. Fault alert information includes the anomaly type and severity level, enabling maintenance personnel to clearly understand the cause and urgency of the fault, quickly develop repair plans, and avoid blind maintenance. By recording anomaly types and severity levels, maintenance data is accumulated, facilitating subsequent analysis of fault patterns, optimization of maintenance cycles and strategies, and achieving a shift from reactive maintenance to proactive prevention.

[0031] As a preferred embodiment of the technical solution of the present invention, it further includes step S6: uploading at least one of the processing results of step S4, the fault warning information generated in step S5, and the real-time monitoring data to the host system through the communication module.

[0032] As a preferred embodiment of the technical solution of the present invention, step S7 is further included: the connection or disconnection status of the middle slider of the metal terminal is detected in real time by the slider detection module, and the status signal is transmitted to the main control module for collaborative analysis.

[0033] As a preferred embodiment of the technical solution of the present invention, at the same time or after generating the fault warning information in step S5, step S8 is also included: controlling the dual-color indicator light connected to the main control module to display the corresponding color or flashing mode according to the fault type or level.

[0034] As can be seen from the above technical solutions, this application has the following advantages: It integrates voltage measurement, infrared temperature measurement, pressure detection, and the main control module, solving the shortcomings of traditional terminal blocks that can only achieve single electrical connection or single parameter monitoring. This enables comprehensive monitoring of core fault points such as abnormal terminal voltage, overheating, and loose connections, enhancing the intelligent monitoring capabilities of the terminal blocks. The high-voltage attenuation and impedance isolation design of the voltage measurement module, the non-contact detection of the infrared temperature measurement module, and the strain gauge and Wheatstone bridge solution of the pressure detection module specifically address industry pain points such as safety hazards in high-voltage scenarios, temperature interference at terminal contacts, and difficulty in quantifying screw tightness, ensuring the security and accuracy of monitoring data.

[0035] By coordinating the processing of multi-source signals through the main control module, the risk of misjudgment due to single-parameter monitoring is avoided, and the accuracy of fault early warning is improved. Attached Figure Description

[0036] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is an overall architecture diagram of the intelligent wiring terminal provided in an embodiment of the present invention.

[0038] Figure 2 This is a device system architecture diagram provided for an embodiment of the present invention.

[0039] Figure 3 This is the circuit connection diagram for the pressure detection module.

[0040] Figure 4 This is the circuit connection diagram for the voltage measurement module.

[0041] Figure 5 This is the circuit connection diagram for the power module.

[0042] Figure 6 This is a circuit connection diagram for the MODBUS transmission module.

[0043] Figure 7 It consists of the main control module and peripheral circuits.

[0044] Figure 8 This is a flowchart illustrating the method provided in an embodiment of the present invention. Detailed Implementation

[0045] To make the purpose, features, and advantages of this application more apparent and understandable, specific embodiments and accompanying drawings will be used to clearly and completely describe the technical solution protected by this application. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this application and in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0047] like Figure 1 and Figure 2 As shown, this embodiment of the invention provides an intelligent terminal block device integrating multi-parameter detection, including an insulating shell, metal terminals and wire clamping screws 8, and also includes a main control module 6 and a voltage measurement module 2, an infrared temperature measurement module 5 and a pressure detection module 1 respectively connected to the main control module 6; The voltage measurement module 2 is used to proportionally attenuate the high voltage across the metal terminals to a safe range and perform impedance isolation before transmitting it to the main control module 6; the main control module and peripheral circuits are as follows: Figure 7 As shown, it includes MCU U1.

[0048] The infrared temperature measurement module 5 is used for non-contact detection of the temperature of the metal terminal contacts and sends the data to the main control module; in this embodiment of the invention, the infrared temperature measurement module 5 is a non-contact infrared temperature sensor. Both ends of the metal terminal are equipped with a voltage measurement module 2, a pressure detection module 1, and a dual-color indicator light.

[0049] The infrared temperature measurement module adopts an infrared non-contact testing solution, effectively avoiding the safety risks caused by direct contact with high-voltage terminals. In a preferred embodiment of the invention, the module's temperature measurement range covers -40~150℃, which can be adapted to outdoor substations with temperatures ranging from -30~85℃ and indoor equipment operating temperature monitoring scenarios. The built-in 24-bit A / D conversion unit ensures temperature measurement accuracy (resolution ≥0.2℃), with a typical response time ≤0.3 seconds. It can quickly capture the dynamic temperature changes of terminal metal contacts caused by increased contact resistance, overload, etc., providing a real-time and accurate temperature data source for terminal over-temperature fault alarms and supporting the judgment of equipment safe operating status.

[0050] The pressure detection module 1 is used to detect pressure signals characterizing the tightness of the wire clamping screw. The pressure detection module includes a resistance strain gauge and a strain force measurement circuit. The resistance strain gauge is attached to the bottom of the metal terminal at the stress point. The resistance strain gauge is connected to a Wheatstone bridge formed by the strain force measurement circuit. The strain force measurement circuit converts the resistance change of the strain gauge into a voltage signal, which is then sent to the main control module after analog-to-digital conversion. A resistance strain gauge is attached to the bottom of the terminal block metal connector (aligned with the stress point of the wire clamping screw) to convert the minute strain force generated by screw tightening / loosening into a weak electrical signal at the mV level. A 24-bit high-precision analog-to-digital converter chip is used to receive dual-level signals through differential input mode, which are then converted into standard digital signals after gain amplification and anti-interference processing. Combined with the factory-calibrated qualified tightening threshold range, the MCU algorithm compares the difference between the current measured value and the reference value to determine whether the screw is loose, outputting a status signal and strain force value, providing a high-precision data source for fault alarms, and meeting the requirements for terminal connection reliability monitoring.

[0051] The main control module is used to process and analyze the received voltage, temperature and pressure signals to achieve comprehensive monitoring and fault early warning of the metal terminal connection status.

[0052] In this embodiment of the invention, the strain measurement circuit converts the deformation resistance of the resistive strain gauge into a voltage signal through Kirchhoff's law and a Wheatstone bridge structure. Then, the voltage signal is converted into a digital pulse signal through a dual-channel pressure converter and sent to the main control module for processing. The tightness of the wire screw is determined based on the processing result.

[0053] The two resistance strain gauges are designated as the first and second resistance strain gauges; the pressure detection module is as follows: Figure 3 As shown, the strain measurement circuit includes resistors R11, R12, R13, R14, R15, and R16. The connection points of the first and second resistive strain gauges, together with R11, R12, R13, R14, R15, and R16, form a Wheatstone bridge structure. The first connection point of the first resistive strain gauge is connected to a second power supply via fuse F3. The second power supply is grounded via resistors R11 and R13. The second connection point of the first resistive strain gauge is grounded via fuse F4 and resistor R12. The connection point of fuse F4 with resistor R12 and the connection point of resistors R11 and R13 serve as the first output channel of the Wheatstone bridge structure. The first connection point of the second resistance strain gauge is connected to the second power supply through fuse F5. The second power supply is grounded through resistors R14 and R16. The second connection point of the second resistance strain gauge is grounded through fuse F6 and resistor R15. The connection point of fuse F6 and resistor R15, as well as the connection point of resistors R14 and R16, serve as the second output channel of the Wheatstone bridge structure. Filter capacitors, C6 and C4, are provided between the two input terminals of each input channel of the dual-channel pressure converter U5. The two output channels of the Wheatstone bridge structure are connected to the two input channels of the dual-channel pressure converter U5 respectively. The power supply terminal of the dual-channel pressure converter U5 outputs a second power supply of 3.2V through a voltage regulator circuit to power the resistive strain gauge. The output terminal of the dual-channel pressure converter U5 is connected to the main control module MCU.

[0054] The dual-channel pressure converter U5 has a first input channel, a second input channel, a power supply terminal, a reference terminal, and an output terminal; the first differential output channel is connected to the first input channel, and the second differential output channel is connected to the second input channel; The power supply terminal of the dual-channel pressure converter U5 is connected to the first power supply, and its reference terminal generates the second power supply through a voltage regulator circuit to power the first resistive strain gauge and the second resistive strain gauge. The output terminal of the dual-channel pressure converter U5 is connected to the main control module. The main control module determines the tightness of the wire clamping screw 8 based on the digital pulse signal output by the dual-channel pressure converter U5. The power supply terminal of the dual-channel pressure converter U5 is connected to the emitter of transistor Q1. The base of transistor Q1 is connected to the BASE terminal of the dual-channel pressure converter U5. The collector of transistor Q1 is grounded through resistors R8 and R9 connected in series. The connection point of resistors R8 and R9 is connected to the VFB terminal of the dual-channel pressure converter U5. The collector of transistor Q1 is also connected to the AVDD terminal of the dual-channel pressure converter U5. The AVDD terminal of the dual-channel pressure converter outputs a second power supply of 3.2V. The second power supply of 3.2V is grounded through Zener diode D2 and also through capacitor C9.

[0055] The resistance strain gauges connected to J4 and J5 serve as one arm of a Wheatstone bridge. When no force is applied, the resistance value of the strain gauges is stable, the bridge satisfies Kirchhoff's current / voltage law, and the voltage difference at the output terminals is 0 (or a fixed reference value). When the clamping screw is tightened / loosened, the strain gauge undergoes a slight deformation (tensile / compression) along with the metal connector, and its resistance value changes linearly with the degree of deformation (the core characteristic of strain gauges: the rate of resistance change is proportional to the amount of deformation). The change in strain gauge resistance disrupts the balance of the Wheatstone bridge. According to Kirchhoff's laws, the bridge output will generate a weak voltage signal in the mV range corresponding to the amount of deformation, realizing the conversion of mechanical force into electrical signal.

[0056] The mV-level voltage signal output from the Wheatstone bridge is filtered by capacitors C5 and C6 to remove high-frequency noise before being input to the dual-channel pressure converter. The pressure converter has a built-in 24-bit high-precision analog-to-digital converter (ADC) unit that receives signals through differential input mode. After gain amplification and anti-interference processing, the analog voltage signal is converted into a digital pulse signal. The pressure converter's self-contained power supply design (independently powered by VAVDD) avoids noise interference from external power supplies, further ensuring signal conversion accuracy.

[0057] The dual-channel pressure converter U5 establishes synchronous communication with the main control module through PD_SCK (clock line) and DOUT (data line): PD_SCK provides the clock synchronization signal, and DOUT transmits the digitized strain force signal; After receiving the digital signal, the main control module MCU combines the factory-calibrated qualified tightening threshold range and uses an algorithm to compare the difference between the current measured value and the reference value to determine the tightening status of the wire clamping screw, including detecting whether there is looseness or insufficient tightening force. If an abnormality is detected (such as the screw being loose and the strain force being lower than the threshold), the MCU will trigger an alarm mechanism.

[0058] like Figure 4 As shown, the voltage measurement module includes two input channels with identical circuit structures, each adapted to voltage monitoring of different terminals; the output terminals of the two input channels are respectively connected to the main control module. One input channel receives input from the high-voltage signal input interface J6. Input interface J6 is connected to a multi-stage voltage divider circuit via fuse F1. The multi-stage voltage divider circuit includes resistors R6, R7, and R23 connected in series. The connection point of resistors R7 and R23 is connected to the first power supply 3.3V via resistor R22. The connection point of resistors R23 and R7 is also grounded via filter capacitor C20. The connection point of resistors R6 and R7 is connected to the positive input terminal of voltage follower U8. The inverting input terminal of voltage follower U8 is connected to the output terminal. The power supply terminal of voltage follower U8 is connected to the first power supply 3.3V. The positive input terminal of voltage follower U8 is also grounded via Zener diode D1. The output terminal of voltage follower U8 is connected to the main control module MCU.

[0059] The other input channel receives input from the high-voltage signal input interface J7. Input interface J7 is connected to a multi-stage voltage divider circuit via fuse F2. The multi-stage voltage divider circuit includes resistors R27, R28, and R25 connected in series. The connection point of resistors R28 and R25 is connected to the first power supply 3.3V via resistor R24. The connection point of resistors R25 and R28 is also grounded via filter capacitor C22. The connection point of resistors R27 and R28 is connected to the positive input terminal of voltage follower U9. The inverting input terminal of voltage follower U9 is connected to the output terminal. The power supply terminal of voltage follower U9 is connected to the first power supply. The positive input terminal of voltage follower U9 is also grounded via Zener diode D1. The output terminal of voltage follower U9 is connected to the main control module MCU.

[0060] It is divided into two independent input channels, each adapted to voltage monitoring of different terminals. It is directly connected to a resistor divider network and serves as the input terminal for high-voltage signals. Each input channel is connected in series with a main voltage divider circuit (one 20MΩ large resistor). First path: J6 input terminal → R6 → subsequent voltage divider / follower circuit; Second path: J7 other input terminal → R27 → subsequent voltage divider / follower circuit; Reduce the ±650V high voltage to a safe voltage that the ADC can withstand.

[0061] The auxiliary voltage divider / current limiting resistor is connected in series with the main voltage divider resistor to form a multi-stage voltage divider network: Route 1: R6→R7→R23→Ground; Second route: R27→R28→R25→Ground; The voltage divider ratio is refined to ensure that the output voltage accurately matches the input range of the voltage follower.

[0062] The input terminals of the voltage follower are connected to the output nodes of two voltage divider networks to receive the low-voltage analog signals after voltage division; the output terminal OUT pin is connected to the ADC interface of the main control module to transmit the isolated and stable analog signal. VDD pin: Connected to the first power supply; Ground pin VSS: Connect to common ground GND; The voltage follower isolates the measurement circuit from the sampling circuit, avoiding load effects.

[0063] Zener diode D1 absorbs voltage spikes, preventing supply voltage fluctuations from impacting the voltage follower and ensuring device safety. Filter capacitor C20 filters out high-frequency noise in the voltage-divided signal, making the analog signal smoother.

[0064] The voltage measurement module adopts a resistance voltage divider measurement scheme, which uses multiple large resistors in series to reduce the acquired voltage to a safe range to avoid triggering protection actions. A pre-voltage follower isolates the measurement and sampling circuits to avoid load effects, and a high-precision ADC converts the analog voltage signal into a digital signal. In a preferred embodiment of the invention, the module's measurement point resistance to ground is ≥20MΩ, and the maximum measurement range is ±650V, which can accurately adapt to the terminal DC±220V / AC≤220V monitoring requirements, providing a reliable data source for voltage anomaly diagnosis.

[0065] In some embodiments, a communication module is also included, the input of which is connected to the output of the main control module, for uploading the monitoring data processed by the main control module to the host system.

[0066] The communication module is a MODBUS transmission module; such as Figure 6 As shown, the MODBUS transmission module includes an RS485 transceiver chip U7. The VDDA / VDDB terminals of the RS485 transceiver chip U7 are connected to the first power supply (3.3V) and the third power supply (5V), respectively. The UART transmitter of the RS485 transceiver chip U7 is used to send the data to be sent by the main control module (MCU) to the transceiver. The UART receiver of the RS485 transceiver chip is used to send the bus data received by the transceiver back to the main control chip. The RS485 bus interface of the RS485 transceiver chip is connected to the RS485_A bus and the RS485_B bus after passing through the terminating matching resistor R2.

[0067] In addition, a bias / terminating resistor (R36, R37) of about 1KΩ is usually connected across both ends of the RS485_A and RS485_B buses for interference suppression and impedance matching to ensure signal integrity during high-speed communication.

[0068] The MODBUS transmission module features an isolated 2.5kV half-duplex RS485 transceiver with a maximum signal transmission rate of 5Mbps, supporting cascading of up to 256 bus nodes. The bus pins are GNDB anti-static ±8kVHBM, and the signal side pins are GNDA anti-static ±6kVHBM, effectively resisting strong electromagnetic interference. The module is compatible with the MODBUS transmission protocol, enabling the reading and uploading of parameters such as terminal voltage, pressure, slider status, and temperature, meeting data reporting latency requirements of ≤5 seconds and system interoperability requirements.

[0069] In this embodiment of the invention, a power supply module 7 is also included, which supplies power to the main control module, voltage measurement module, infrared temperature measurement module, pressure detection module, and communication module respectively, such as... Figure 1 As shown. The power module is as follows. Figure 5 As shown, the system includes an isolation power conversion chip U4, a filter unit, an ESD protection unit, and a common-mode inductor unit, with the following specific connections: U4 is a 5V to 3.3V isolated DC / DC converter. The input side (+5V, GND1) and the output side (+3.3V, GND) are electrically isolated through magnetic coupling. The input +5V is filtered by capacitors C11 and C12 and then input to the VDDP pin of the isolated power conversion chip U4. The isolated power conversion chip U4 internally converts the 5V to isolated 3.3V through a high-frequency switching circuit and outputs it from the VISO pin. This avoids electrical interference between the low-voltage control circuit and the high-voltage terminal circuit of the intelligent terminal block and ensures the safety of personnel operation.

[0070] The capacitors C11 (low-frequency filter) and C12 (high-frequency filter) on the input side form a π-type filter to filter out ripple and electromagnetic interference in the +5V input, ensuring a stable input power supply for the isolated power conversion chip U4. The capacitor C13 on the output side further filters out the high-frequency noise of the +3.3V output of the isolation power conversion chip U4, providing a clean power supply to the downstream low-voltage module and avoiding abnormal module operation caused by power fluctuations.

[0071] J3 is an ESD protection device. When the RS485 bus is subjected to electrostatic discharge or surge, J3 quickly conducts, clamping the voltage within a safe range (≤5V) to prevent the surge signal from entering the downstream circuit. The common-mode inductor FB1 (model: BLM15AG100SN1D) presents high impedance to common-mode interference on the RS485 bus, suppressing the transmission of interference signals, while presenting low impedance to differential-mode signals to ensure normal transmission of communication data.

[0072] The power module uses an integrated isolated DC-DC converter B0505ST8-W3 to convert the input 5V power supply into a stable 3.3V output with a maximum output power of 300mW, meeting the power supply requirements of modules such as infrared temperature measurement, strain measurement, and communication. The module features a low temperature coefficient and ultra-small size, adapting to standardized terminal installation spaces, and has a dielectric withstand voltage of up to 5KV within 60 seconds, effectively blocking common-mode interference in the high-voltage environment of substations and ensuring the safety and stability of equipment power supply.

[0073] In this embodiment of the invention, the main control module is used to perform collaborative analysis and processing of multi-source signals, and the specific process is as follows: The voltage, temperature, and pressure signals are time-aligned and filtered to eliminate noise interference. The processed voltage signal is compared with the preset normal voltage range. If it exceeds the range, it is determined to be an abnormal voltage. The processed temperature signal is compared with a preset temperature alarm threshold. If the threshold is exceeded, it is determined to be an abnormal temperature. The processed pressure signal is analyzed, including: calculating the difference between the current pressure value and the preset qualified fastening pressure reference value; and / or analyzing the changing trend of the pressure signal within a set time window; if the difference exceeds the allowable deviation range or the changing trend shows that the pressure continues to drop, it is determined to be an abnormal pressure. Based on the judgment result, a comprehensive status flag is generated. The flag includes at least three status information: voltage normal / abnormal, temperature normal / abnormal, and pressure normal / abnormal.

[0074] The main control module is also used to execute predetermined fault logic judgment rules based on the comprehensive status flag, the rules including: a) If only the pressure signal is determined to be abnormal, a screw loosening warning message will be generated, with the warning level being the alert level; b) If the temperature signal is determined to be abnormal, an over-temperature alarm will be generated regardless of the status of other signals, with the warning level being emergency. c) If the voltage signal is determined to be abnormal, a voltage abnormality alarm message is generated, and the warning level is determined according to the type of abnormality; d) If both pressure and temperature signals are abnormal, a combined fault alarm message indicating overheating due to loose connection will be generated, with the warning level being emergency.

[0075] The main control module is also used to record each fault warning information and its corresponding original voltage, temperature, and pressure data and timestamps to form a historical fault event chain. When a fault warning occurs again, the current data is correlated with the historical event chain to determine the repetition or development trend of the fault.

[0076] The specific trend of pressure signal changes is analyzed as follows: The sliding time window algorithm is used to calculate the first derivative or linear regression slope of the pressure signal sequence within the window. If the slope is continuously negative and the absolute value exceeds the preset trend change rate threshold, it is determined that the pressure is in a continuous downward trend.

[0077] In embodiments of the present invention, such as Figure 1 As shown, it also includes a dual-color indicator light 3, which is connected to the main control module 6 and is used to display the device status or fault information according to the judgment result of the main control module.

[0078] In some embodiments, a slider detection module is also included. The output of the slider detection module is connected to the main control module and is used to detect the connection or disconnection status of the middle slider of the metal terminal and transmit the status signal to the main control module. The triggering mechanism of the slider detection module is mechanically coupled to the moving part of the slider, so that when the slider switches between the connected position and the disconnected position, the state of the electrical contacts of the slider detection module is changed.

[0079] The slider detection module is a micro switch or a limit switch. When using... Figure 1 When the micro switch 4 shown is activated, the slider moves from one position to another when the operator moves the slider of the metal terminal.

[0080] The slider's mechanical structure presses or releases a trigger lever / button of a built-in microswitch.

[0081] The contact state inside the micro switch changes accordingly (from normally open to closed, or from normally closed to open).

[0082] The electrical signal indicating the contact status is transmitted to the I / O (input / output) port of the main control module.

[0083] The main control module can logically determine whether the slider is in a connected or disconnected state by reading the high / low level of the I / O port.

[0084] The outer shell in this embodiment of the invention is made of PA66-30GF engineering plastic, with a tensile strength of 130-170MPa and a heat distortion temperature of ≥210℃, possessing excellent mechanical properties and high-temperature stability; it can completely prevent dust and resist low-pressure water jets from any angle, and is suitable for outdoor substations operating at -30℃ low temperatures and indoor cabinet operating at 80℃ high temperatures; the opening specifications are compatible with 6 / 10MM² wires, the installation size matches the 35mm standard guide rail, and it can be directly replaced with traditional terminals.

[0085] In the renovation project of automatic control equipment for secondary circuit safety in power systems, the intelligent terminal block of this application is used to replace the traditional terminal block, thereby upgrading the terminal block's status sensing capability. This intelligent terminal block integrates a multi-physical quantity monitoring unit, equipped with a high-precision infrared temperature sensor, pressure sensor, and voltage sampling circuit. It can simultaneously collect key parameters such as metal contact point temperature, screw tightening pressure, and terminal voltage, and complete data preprocessing through a built-in edge computing module, including digital filtering, zero-point calibration, and threshold over-limit judgment.

[0086] The intelligent terminal blocks in each safety automatic control device are connected to an industrial-grade switch via an RS485 bus. After conversion via a standard RJ45 interface, they are connected to the field industrial Ethernet. Encrypted data transmission is achieved based on the TCP / IP protocol (AES-128 encryption algorithm), and finally converged to the Modbus TCP protocol conversion host at the station end. This host is equipped with a dedicated data processing platform, which has the functions of synchronous data acquisition from multiple devices, time-series database storage, and visualization analysis. It also supports second-level backtracking of historical data and chain-like analysis of fault events.

[0087] Under normal operating conditions, monitoring data is stored locally according to a preset cycle; when the detected parameters exceed the preset threshold, a first-level early warning mechanism is immediately triggered, and real-time data is uploaded to the dispatch master station and the operation and maintenance cloud platform.

[0088] like Figure 8 As shown in the figure, this embodiment of the invention also provides a method for monitoring the status of terminals based on the intelligent terminal block device described in the above embodiments, including the following steps: S1: The voltage signal across the metal terminals is acquired in real time via the voltage measurement module; S2: The temperature signal of the metal terminal contact is acquired in real time in a non-contact manner through an infrared temperature measurement module; S3: Real-time acquisition of pressure signals characterizing the tightness of the wire clamping screws via the pressure detection module; S4: The main control module receives the voltage signal, temperature signal, and pressure signal, and performs collaborative analysis and processing on the multi-source signals; specifically, it includes: comparing the voltage signal with a preset normal voltage range to determine whether a voltage abnormality has occurred; comparing the temperature signal with a preset temperature threshold to determine whether a temperature abnormality has occurred; and analyzing the changing trend of the pressure signal or comparing it with a preset pressure threshold to determine whether the wire clamping screw is loose or has insufficient tightening force. S5: Based on the analysis and processing results, determine whether the connection status of the metal terminals is abnormal, and generate fault warning information when an abnormality is determined.

[0089] In this embodiment of the invention, S3 specifically includes: Strain is sensed by a resistive strain gauge attached to the bottom of a metal terminal at the stress point. The resistance change of the strain gauge is converted into a voltage signal by a Wheatstone bridge circuit composed of strain force measurement circuit, and then the pressure signal is generated after analog-to-digital conversion.

[0090] In this embodiment of the invention, in step S5, when at least one of the voltage signal, temperature signal, and pressure signal is determined to be abnormal, a fault warning message is generated; the fault warning message includes at least the abnormality type and / or abnormality level.

[0091] In this embodiment of the invention, step S6 is further included: uploading at least one of the processing result of step S4, the fault warning information generated in step S5, and the real-time monitoring data to the host system through the communication module.

[0092] In this embodiment of the invention, step S7 is further included: the connection or disconnection status of the middle slider of the metal terminal is detected in real time by the slider detection module, and the status signal is transmitted to the main control module for collaborative analysis.

[0093] In this embodiment of the invention, at the same time or after generating fault warning information in step S5, step S8 is also included: controlling the dual-color indicator light connected to the main control module to display the corresponding color or flashing mode according to the fault type or level.

[0094] Those skilled in the art will clearly understand that the techniques in the embodiments of the present invention can be implemented using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions in the embodiments of the present invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium such as a USB flash drive, mobile hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk, or other media capable of storing program code. It includes several instructions to cause a computer terminal (which may be a personal computer, server, or a second terminal, network terminal, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention.

[0095] In the embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0096] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0097] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0098] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent terminal block device integrating multi-parameter detection, comprising an insulating housing, metal terminals, and wire clamping screws, characterized in that, It also includes a main control module and a voltage measurement module, an infrared temperature measurement module, and a pressure detection module, which are respectively connected to the main control module; The voltage measurement module is used to attenuate the high voltage across the metal terminals to a safe range and then transmit it to the main control module after impedance isolation. The infrared temperature measurement module is used for non-contact detection of the temperature of the metal terminal contacts and sends the data to the main control module. The pressure detection module is used to detect pressure signals characterizing the tightness of the wire screw; the pressure detection module includes a resistive strain gauge and a strain force measurement circuit, the resistive strain gauge is attached to the bottom of the metal terminal at the stress position; the resistive strain gauge is connected to a Wheatstone bridge formed by the strain force measurement circuit; the strain force measurement circuit is used to convert the resistance change of the strain gauge into a voltage signal, and after analog-to-digital conversion, it is sent to the main control module; The main control module is used to process and analyze the received voltage, temperature and pressure signals to achieve comprehensive monitoring and fault early warning of the metal terminal connection status.

2. The intelligent terminal block device integrating multi-parameter detection according to claim 1, characterized in that, The strain measurement circuit converts the deformation resistance of the resistive strain gauge into a voltage signal through Kirchhoff's law and Wheatstone bridge structure. Then, the voltage signal is converted into a digital pulse signal through a dual-channel pressure converter and sent to the main control module for processing. The tightness of the wire screw is determined based on the processing result.

3. The intelligent terminal block device integrating multi-parameter detection according to claim 2, characterized in that, The two resistance strain gauges are designated as the first resistance strain gauge and the second resistance strain gauge. The strain measurement circuit includes a Wheatstone bridge structure consisting of resistors R11, R12, R13, R14, R15, and R16. One end of the first resistive strain gauge is connected to a second power supply, and the other end is grounded through fuse F4 and resistor R12; one end of resistor R11 is connected to the second power supply, and the other end is grounded through resistor R13; the connection node between the first resistive strain gauge and resistor R12, and the connection node between resistor R11 and resistor R13, constitute the first differential output channel of the Wheatstone bridge structure. One end of the second resistive strain gauge is connected to the second power supply, and the other end is grounded through fuse F6 and resistor R15; one end of resistor R14 is connected to the second power supply, and the other end is grounded through resistor R16; the connection node between the second resistive strain gauge and resistor R15, and the connection node between resistor R14 and resistor R16, constitute the second differential output channel of the Wheatstone bridge structure. The two output channels of the Wheatstone bridge structure are respectively connected to the two input channels of the dual-channel pressure converter. The power supply terminal of the dual-channel pressure converter outputs a second power supply through a voltage regulator circuit to power the resistive strain gauge. The output terminal of the dual-channel pressure converter is connected to the main control module. The main control module determines the tightness of the wire clamping screw based on the digital pulse signal output by the dual-channel pressure converter.

4. The intelligent terminal block device integrating multi-parameter detection according to claim 1, characterized in that, The voltage measurement module includes two input channels with identical circuit structures, each adapted to voltage monitoring of different terminals; the outputs of the two input channels are respectively connected to the main control module. One input channel receives input from the high-voltage signal input interface J6. Input interface J6 is connected to a multi-stage voltage divider circuit via fuse F1. The multi-stage voltage divider circuit includes resistors R6, R7, and R23 connected in series. The connection point of resistors R7 and R23 is connected to the first power supply via resistor R22. The connection point of resistors R23 and R7 is also grounded via filter capacitor C20. The connection point of resistors R6 and R7 is connected to the positive input terminal of a voltage follower. The inverting input terminal of the voltage follower is connected to the output terminal. The power supply terminal of the voltage follower is connected to the first power supply. The positive input terminal of the voltage follower is also grounded via Zener diode D1. The output terminal of the voltage follower is connected to the main control module.

5. The intelligent terminal block device integrating multi-parameter detection according to claim 1, characterized in that, It also includes a communication module and a power module. The input terminal of the communication module is connected to the output terminal of the main control module, and is used to upload the monitoring data processed by the main control module to the host system. The power supply module provides power to the main control module, voltage measurement module, infrared temperature measurement module, pressure detection module, and communication module, respectively.

6. The intelligent terminal block device integrating multi-parameter detection according to claim 5, characterized in that, It also includes a dual-color indicator light connected to the main control module, used to display the device status or fault information based on the judgment result of the main control module.

7. The intelligent terminal block device integrating multi-parameter detection according to claim 1, characterized in that, The main control module is used for collaborative analysis and processing of multi-source signals. The specific process is as follows: The voltage, temperature, and pressure signals are time-aligned and filtered to eliminate noise interference. The processed voltage signal is compared with the preset normal voltage range. If it exceeds the range, it is determined to be an abnormal voltage. The processed temperature signal is compared with a preset temperature alarm threshold. If the threshold is exceeded, it is determined to be an abnormal temperature. The processed pressure signal is analyzed, including: calculating the difference between the current pressure value and the preset qualified fastening pressure reference value; and / or analyzing the changing trend of the pressure signal within a set time window; if the difference exceeds the allowable deviation range or the changing trend shows that the pressure continues to drop, it is determined to be an abnormal pressure. Based on the judgment result, a comprehensive status flag is generated. The flag includes at least three status information: voltage normal / abnormal, temperature normal / abnormal, and pressure normal / abnormal.

8. The intelligent terminal block device integrating multi-parameter detection according to claim 7, characterized in that, The main control module is also used to execute predetermined fault logic judgment rules based on the comprehensive status flag, the rules including: a) If only the pressure signal is determined to be abnormal, a screw loosening warning message will be generated, with the warning level being the alert level; b) If the temperature signal is determined to be abnormal, an over-temperature alarm will be generated regardless of the status of other signals, with the warning level being emergency. c) If the voltage signal is determined to be abnormal, a voltage abnormality alarm message is generated, and the warning level is determined according to the type of abnormality; d) If both pressure and temperature signals are abnormal, a combined fault alarm message indicating overheating due to loose connection will be generated, with the warning level being emergency.

9. The intelligent terminal block device integrating multi-parameter detection according to claim 1, characterized in that, It also includes a slider detection module, the output of which is connected to the main control module. The slider detection module is used to detect the connection or disconnection status of the middle slider of the metal terminal and transmit the status signal to the main control module. The triggering mechanism of the slider detection module is mechanically coupled to the moving part of the slider, so that when the slider switches between the connected position and the disconnected position, the state of the electrical contacts of the slider detection module is changed.

10. A method for monitoring the status of terminals in an intelligent terminal block device according to any one of claims 1-9, characterized in that, Includes the following steps: S1: The voltage signal across the metal terminals is acquired in real time via the voltage measurement module; S2: The temperature signal of the metal terminal contact is acquired in real time in a non-contact manner through an infrared temperature measurement module; S3: Real-time acquisition of pressure signals characterizing the tightness of the wire clamping screws via the pressure detection module; S4: The main control module receives voltage signals, temperature signals, and pressure signals, and performs collaborative analysis and processing on the multi-source signals; specifically, it compares the voltage signal with a preset normal voltage range to determine whether a voltage anomaly has occurred. The temperature signal is compared with a preset temperature threshold to determine whether a temperature abnormality has occurred; the trend of the pressure signal is analyzed or compared with a preset pressure threshold to determine whether the wire screw is loose or the tightening force is insufficient. S5: Based on the analysis and processing results, determine whether the connection status of the metal terminals is abnormal, and generate fault warning information when an abnormality is determined.

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