A monitoring system for a control circuit

Abstract

The present invention relates to the technical field of circuit monitoring, and specifically discloses a monitoring system for a control circuit, comprising: an input protection unit, an energy storage unit, a bridge wire unit and a constant voltage switch circuit, wherein a current limiting resistor and a capacitor rectifier bridge form the input protection unit, a polar capacitor and a resistor form the energy storage unit, and a PNP, NPN transistor and a resistor form the bridge wire unit and the constant voltage switch unit. The voltage across the polar capacitor is monitored in real time by a monitoring unit until the starting voltage of the bridge wire unit and the constant voltage switch circuit is met, the temperature of the bridge wire FUSE is monitored based on the starting voltage, the proximity ratio of the bridge wire temperature to a fuse safety threshold is calculated, and a fuse safety or warning signal is obtained according to the comparison between the proximity ratio and the fuse threshold, and the fuse warning signal is used to predict and analyze the fuse time of the bridge wire FUSE, the fuse prediction time of the bridge wire is obtained and compared with the fuse safety time, and the safety state of the bridge wire FUSE is judged.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit monitoring, and in particular to a monitoring system for a control circuit. Background Art

[0002] In the field of electronic detonator control circuit monitoring technology, the traditional control circuit design has some limitations, which affect the safety, reliability and convenience of operation of electronic detonators. Although there have been some attempts to solve the above problems by improving the circuit design, these improvements often require complex operations and high costs, and the misdiagnosis rate is high in practical applications. Therefore, the development of a simple, accurate and fast electronic detonator control circuit is of great significance to improve the safety and reliability of electronic detonators.

[0003] A Chinese patent application with publication number CN111854547B discloses an electronic detonator communication circuit and control method, including: an AC input circuit, a voltage processing and output circuit, and a detection circuit; the rectifier output end of the AC input circuit is connected to the input end of the voltage processing and output circuit; the output end of the voltage processing and output circuit is connected to the input end of the detection circuit; the output end of the detection circuit serves as the communication end of the electronic detonator communication circuit. The embodiment of the present invention provides an electronic detonator communication circuit and control method to solve the technical problem of poor communication efficiency of electronic detonators in the prior art, and at the same time, it can avoid distortion of the filter signal of the electronic detonator during the communication process, thereby improving the communication efficiency of the electronic detonator.

[0004] The circuit design in the prior art often fails to detect the status information of the working components in actual applications, which may affect the performance of the circuit. Therefore, it is necessary to develop a new type of electronic detonator control circuit, which can not only work stably, but also provide more accurate detection results, thereby improving the safety and reliability of electronic detonators. Based on the above background, the present invention aims to provide a new type of electronic detonator control circuit and a detection method thereof, which introduces a detection unit to detect the fusing time of the bridge wire to meet the needs of high safety and high reliability in the field of electronic detonator blasting.

[0005] To this end, the present invention provides a monitoring system for a control circuit. Summary of the invention

[0006] The object of the present invention is to provide a monitoring system for a control circuit to solve the above-mentioned problems.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A monitoring system for a control circuit, comprising:

[0009] Data acquisition module: obtains the voltage of polar capacitor C2 and marks it as U2, compares the voltage U2 of polar capacitor C2 with the control start voltage Uk of the constant voltage switch unit, and obtains a constant voltage start signal;

[0010] Data processing module: Based on the constant voltage start signal, the time point is used as the X-axis and the voltage is used as the Y-axis to draw the time-voltage change curve of the polar capacitor C2 in a two-dimensional rectangular coordinate system. Based on the time-voltage change curve, the voltage approach value Jz is obtained through processing and analysis, and a constant voltage working signal is generated according to the comparison result between the approach value and the approach threshold value;

[0011] Voltage analysis module: Based on the constant voltage working signal, obtain the temperature Tf of the bridge wire FUSE, calculate the average temperature of the bridge wire, calculate the proximity value between the average temperature of the bridge wire and the fuse safety threshold, compare the proximity value with the fuse proximity threshold, and generate a fuse safety signal and a fuse warning signal;

[0012] Change analysis module: Based on the fuse warning signal, the temperature of the fuse of the bridge wire FUSE is predicted and analyzed, the time-temperature change curve is drawn in the coordinate system, the linear reference coefficient Xc of the time-temperature change curve is calculated, and the change trend of the time-temperature change curve is judged according to the linear reference coefficient Xc of the time-temperature change curve, wherein the change trend includes linear change and nonlinear change;

[0013] Prediction and analysis module: Based on the changing trend of the time-temperature curve, the curve changing trend is divided into linear and nonlinear changes. The changing trend of the curve is processed and analyzed to obtain the predicted fuse time. According to the comparison result between the predicted fuse time and the safe fuse time, the safety status of the bridge wire FUSE is analyzed.

[0014] As a further technical solution of the present invention, the constant pressure start signal is generated in the following manner:

[0015] If the voltage U2 of polar capacitor C2 Controlling the starting voltage Uk indicates that the voltage U2 of the polar capacitor C2 in the energy storage unit meets the requirements of the constant voltage switch unit, and a constant voltage starting signal is generated;

[0016] If the voltage U2 of polar capacitor C2 The control starting voltage Uk indicates that the voltage U2 of the polar capacitor C2 in the energy storage unit cannot meet the voltage condition required by the constant voltage switch unit, and the input protection unit is waiting to continue charging the polar capacitor C2 until the voltage across the polar capacitor C2 reaches the control starting voltage Uk.

[0017] As a further technical solution of the present invention, the constant pressure working signal is generated in the following manner:

[0018] If Jz Jy, it indicates that the voltage of polar capacitor C2 is close to value Jz, which has reached the control circuit start voltage, but has not reached the voltage close to threshold value Jy, generating a constant voltage working signal;

[0019] If Jz Jy, it indicates that the voltage of polar capacitor C2 is close to value Jz, which has reached the control circuit start-up voltage, and at the same time reaches the voltage close to the threshold Jy, sending a warning to the system and closing the circuit.

[0020] As a further technical solution of the present invention, the generation method of the fuse safety signal and the fuse warning signal is:

[0021] If the temperature approach value of the bridge wire is less than the temperature approach threshold, it means that the energy generated by the current flowing through the bridge wire FUSE is insufficient to cause the bridge wire FUSE to fuse, and a fuse safety signal is generated;

[0022] If the temperature of the bridge wire is close to If the temperature is close to the value, it means that the energy generated by the current flowing through the bridge wire FUSE may cause the bridge wire FUSE to melt, generating a fuse warning signal.

[0023] As a further technical solution of the present invention, the linear reference coefficient Xc is obtained as follows:

[0024] The linear reference coefficient is calculated based on the proportion of the number of curve segments in the same direction Tx and the variance Fc of the slope data set of the curve segments in the same direction;

[0025] By formula: Obtain the linear reference coefficient Xc of the time-temperature variation curve, where a and b are preset proportional coefficients;

[0026] Compare the linear reference coefficient Xc with the linear reference coefficient threshold:

[0027] If the linear reference coefficient Xc ≥ the linear reference coefficient threshold Xz, it indicates that the change trend of the time-temperature change curve is a linear change;

[0028] If the linear reference coefficient Xc is less than the linear reference coefficient threshold Xz, it indicates that the change trend of the time-temperature change curve is a nonlinear change.

[0029] As a further technical solution of the present invention, the method for obtaining the proportion of the number of curve segments in the same direction Tx and the variance Fc of the slope data set of the curve segments in the same direction is as follows:

[0030] Based on the fuse warning signal, the temperature change value of the bridge wire FUSE is obtained, and a time-temperature change curve is drawn in a two-dimensional rectangular coordinate system, with time as the X-axis and the temperature of the bridge wire as the Y-axis. The fuse threshold Rd of the bridge wire FUSE is used as a fuse reference line parallel to the X-axis;

[0031] Specifically, the time-temperature variation curve is divided into a plurality of sub-curve segments, and the slope of each sub-curve segment is calculated;

[0032] Connect the two ends of the time-temperature variation curve to obtain a reference line, measure the slope of the reference line, and compare the slope of the sub-curve segment with the slope of the reference line for positive and negative signs;

[0033] If the slope of the sub-curve segment has the same sign as the slope of the reference line, the sub-curve segment is marked as a curve segment with the same direction;

[0034] If the slope of the sub-curve segment is different from the slope of the reference line in sign, the sub-curve segment is marked as a non-co-directional curve segment;

[0035] Count the number of curve segments in the same direction and perform ratio processing with the number of sub-curve segments to obtain the ratio of the number of curve segments in the same direction and mark it as Tx.

[0036] The slopes of the curve segments in the same direction are obtained, the slopes of all the curve segments in the same direction are integrated into a slope data group, and the variance value of the slope data group is calculated and marked as Fc.

[0037] As a further technical solution of the present invention, the method for obtaining the predicted fuse time is:

[0038] Based on the linear change trend of the time-temperature change curve, the time-temperature change curve is fitted by the least squares method in a two-dimensional rectangular coordinate system to obtain a fitting straight line, which is extended to intersect the fitting straight line with the fuse reference line, and the time point corresponding to the intersection on the X-axis is obtained to obtain the predicted fuse time point. The predicted fuse time point is differenced with the current time point to obtain the predicted fuse time.

[0039] As a further technical solution of the present invention, the method for obtaining the linearly changing predicted fuse time is:

[0040] Based on the linear change trend of the time-temperature change curve, the time-temperature change curve is fitted by the least squares method in a two-dimensional rectangular coordinate system to obtain a fitting straight line, which is extended to intersect the fitting straight line with the fuse reference line, and the time point corresponding to the intersection on the X-axis is obtained to obtain the predicted fuse time point. The predicted fuse time point is differenced with the current time point to obtain the predicted fuse time.

[0041] As a further technical solution of the present invention, the method for obtaining the nonlinearly changing predicted fuse time is:

[0042] Based on the nonlinear change trend of the time-temperature change curve, a sub-curve segment with a positive slope and the largest slope is obtained and marked as a target curve segment. The temperature values ​​corresponding to the two end points of the target curve segment are obtained, and the temperature difference is obtained by subtraction. The temperature difference is processed by ratio with the time length corresponding to the target curve segment to obtain the maximum temperature change rate;

[0043] The current temperature value is subjected to difference processing with the fuse threshold of the bridge wire FUSE to obtain the temperature remaining change value, and the temperature remaining change value is subjected to ratio processing with the maximum temperature change rate to obtain the fuse prediction time.

[0044] As a further technical solution of the present invention, the safe state judgment method of the bridge wire FUSE is:

[0045] Compare the predicted fusing time with the safe fusing time to analyze the fusing safety status of the bridge wire FUSE, specifically:

[0046] If the predicted fuse time is less than or equal to the fuse safety time, the alarm mechanism will be triggered immediately, a warning message will be sent to the operator, and the system will automatically stop all current related operations;

[0047] If the predicted blowing time of the bridge wire FUSE is greater than the blowing safety time, the system continues to run the monitoring program to maintain real-time monitoring of the bridge wire FUSE.

[0048] Beneficial effects of the present invention:

[0049] (1) By real-time monitoring of the voltage across the polar capacitor and the temperature of the bridge wire FUSE, the fuse time of the bridge wire FUSE can be accurately predicted. The monitoring and prediction mechanism enables timely detection of potential safety issues during the use of electronic detonators and the adoption of corresponding preventive measures. For example, when the temperature of the bridge wire FUSE is detected to be close to the fuse safety threshold, the system will generate a fuse warning signal, thereby avoiding accidental explosions caused by the fuse fuse, ensuring the safety and reliability of electronic detonators during use;

[0050] (2) The electronic detonator control circuit integrates a data acquisition module, a data processing module, a voltage analysis module, a change analysis module and a prediction analysis module. These modules work together to achieve comprehensive monitoring of the working status of the electronic detonator. By drawing a time-voltage change curve and a time-temperature change curve in a two-dimensional rectangular coordinate system, the present invention can intelligently analyze and predict the fusing trend of the bridge wire FUSE. In addition, when it is predicted that the fusing time of the bridge wire FUSE may be within an unsafe range, the system will automatically trigger an alarm mechanism and stop related operations. This automated control mechanism greatly improves the convenience and accuracy of the electronic detonator operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The present invention will be further described below in conjunction with the accompanying drawings.

[0052] Figure 1 It is a schematic diagram of the electronic detonator control circuit of the present invention;

[0053] Figure 2 is a flow chart of the electronic detonator monitoring unit of the present invention;

[0054] Figure 3 It is a flow chart of the electronic detonator monitoring module of the present invention. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] Example 1: Please refer to Figure 1 As shown, a monitoring system for a control circuit according to an embodiment of the present invention includes an input protection unit, an energy storage unit, a bridge wire unit and a constant voltage switch circuit.

[0057] The input protection unit includes: current limiting protection resistors R1 and R2, capacitor C1, and rectifier bridge DB1. The rectifier bridge plays a role in reverse connection protection, so that the power supply of the module has the characteristic of non-polarity of connecting the power supply. One end of the input protection unit is connected to the power input, and the other end is connected to the two ends of the energy storage unit;

[0058] One end of the input protection unit is connected to power inputs IN1 and IN2, which introduce power from an external power source into the circuit to provide the entire circuit with power required for operation;

[0059] The current limiting protection resistors R1 and R2 in the input protection unit have one end connected to the power input IN1 and IN2 respectively, and the other end connected to the rectifier bridge DB1 and the capacitor C1. The resistors R1 and R2 divide the input power supply voltage to limit the current and protect the subsequent components from damage due to overcurrent.

[0060] The capacitor C1 of the input protection unit is connected to the resistors R1 and R2 at both ends. When the voltage of the input power source fluctuates, the capacitor C1 will charge and discharge, slow down the voltage change by absorbing or releasing charge, make the output voltage more stable, and play the effect of smoothing voltage fluctuations;

[0061] Specifically, capacitor C1 absorbs high-frequency clutter and interference signals. Capacitor C1 presents a lower impedance to high-frequency signals. When high-frequency clutter and interference signals are generated, capacitor C1 provides a lower impedance path so that the high-frequency clutter and interference signals are short-circuited to the ground. Capacitor C1 improves the stability and anti-interference ability of the input protection circuit.

[0062] One end of the input unit rectifier bridge DB1 is connected to resistors R1, R2, and capacitor C1, and the other end is connected to the energy storage unit. The main function of the rectifier bridge DB1 is to convert AC power into DC power, providing a stable DC power supply for the subsequent circuit. No matter how the positive and negative poles of the input power are connected, the rectifier bridge can convert them into the correct positive and negative polarity so that the circuit can operate normally. The rectifier bridge DB1 makes the power input have the characteristic of non-polarity connection, that is, it does not distinguish the positive and negative poles of the input power supply. This feature avoids circuit damage caused by reverse polarity of the power supply, and at the same time provides the correct power polarity for the subsequently connected polar capacitor C2;

[0063] The energy storage unit includes: polar capacitor C2 and resistor R3. After the capacitor is fully charged, it can trigger the subsequent detonation control circuit to start ignition. One end of the energy storage unit is connected to one end of the constant voltage switch circuit, and the other end is connected to the bridge wire and the constant voltage switch unit. The polar capacitor must be connected to the circuit with the correct polarity, otherwise it will be damaged;

[0064] One end of the energy storage unit is connected to the polar capacitor C2, and the other end is connected to the resistor R3. The negative electrode of one end of the polar capacitor C2 is grounded to provide a stable reference potential for the polar capacitor C2, and the other end is connected to the circuit to play an energy storage role;

[0065] One end of the energy storage unit resistor R3 is connected to the polar capacitor C2. The function of the resistor R3 is to quickly release the charge stored in the polar capacitor C2. At the same time, the resistor R3 balances the voltage across the polar capacitor C2 to prevent the polar capacitor C2 from being damaged by excessive voltage during the charging process.

[0066] The monitoring unit monitors the voltage of the polar capacitor C2 in real time to ensure that it is charged within a safe range to prevent overvoltage. At the same time, it monitors the voltage, current and temperature data of the bridge wire FUSE so that protective measures can be taken in time when the current is abnormal, predict the fusing time of the bridge wire FUSE, and provide safety guarantee for detonation of detonators.

[0067] The bridge wire unit and the constant voltage switch unit include: a bridge wire unit FUSE, resistors R4 and R6 with the same resistance, a resistor R5 with a larger resistance, a PNP transistor Q1, and an NPN transistor Q2. One end of the constant voltage switch circuit is connected to the bridge wire unit.

[0068] The working process of the bridge wire unit and the constant voltage switch unit is as follows: when the polar capacitor C2 of the energy storage unit does not reach the turn-on voltage, the voltage between the base and emitter of the transistors Q1 and Q2 does not reach the turn-on voltage, and the transistors are in the cut-off state;

[0069] It should be noted that the transistor is divided into three states: cut-off, amplification, and saturation. In the cut-off state, almost no current flows between the collector and emitter of the transistor, which is equivalent to the switch being disconnected and the circuit not conducting. When the voltage between the base and emitter reaches the turn-on voltage, the transistor is in the on state, and the current in the PNP transistor flows from the collector to the emitter, and the current in the NPN transistor flows from the emitter to the collector;

[0070] If the voltage across the polar capacitor C2 reaches the control circuit turn-on voltage after being charged, the voltage between the base and emitter of transistors Q1 and Q2 reaches the turn-on voltage, and transistors Q1 and Q2 are turned on.

[0071] Based on the conduction state of transistors Q1 and Q2, the base of transistor Q1 is connected to the collector of transistor Q2, and the emitter of Q1 is connected to the bridge wire FUSE. When Q1 is turned on, the current flows from the bridge wire FUSE through the emitter of Q1 to the base. The voltage drop from the base to the emitter of Q1 is small, and a low potential is maintained between the base of Q1 and the resistors R4 and R5. The low potential makes the voltage between the base and the emitter of Q2 forward biased, causing Q2 to be turned on;

[0072] It should be noted that the transistors Q1 and Q2 form a positive feedback circuit. The conduction of Q2 further increases the potential of the base of Q1, enhancing the conduction degree of Q1. At the same time, the conduction of Q1 in turn affects the base potential of Q2, causing Q2 to conduct, thus forming positive feedback and accelerating the change of the circuit working state.

[0073] The influence of Q2 in the bridge wire unit and the constant voltage switch unit on the bridge wire unit FUSE is as follows: the conduction of the transistor Q2 enables more current to pass through the branch where the bridge wire is located, and the conduction of Q2 changes the equivalent resistance of the bridge wire unit and the constant voltage switch unit, and the current flowing through the bridge wire unit FUSE increases. According to Joule's law, the heat energy of the bridge wire unit FUSE increases. After reaching its melting threshold, the bridge wire FUSE melts, ignites the charge head, and completes the detonation work of the electronic detonator.

[0074] The technical solution of this embodiment is as follows: input protection unit: including current limiting protection resistors R1 and R2, capacitor C1, and rectifier bridge DB1. The function of this unit is to protect the circuit from the influence of reverse polarity of power supply or voltage fluctuation, while absorbing high-frequency clutter and interference signals, and improving the stability and anti-interference ability of the circuit. Energy storage unit: composed of polar capacitor C2 and resistor R3. Polar capacitor C2 is responsible for storing electrical energy, while resistor R3 is used to balance the voltage across the capacitor to prevent the voltage from being too high during charging and damaging the circuit. Bridge wire unit and constant voltage switch unit: including bridge wire FUSE, resistors R4, R5, R6, and PNP transistor Q1 and NPN transistor Q2. These components work together to control the current to flow to the bridge wire FUSE. When capacitor C2 is charged to a certain voltage, the transistor is triggered to turn on, which in turn causes the bridge wire FUSE to fuse and complete the detonation work.

[0075] Example 2: Figure 2 As shown, based on Example 1, a monitoring system for a control circuit according to an embodiment of the present invention includes:

[0076] Data acquisition module: obtains the voltage of polar capacitor C2 and marks it as U2, compares the voltage U2 of polar capacitor C2 with the control start voltage Uk of the constant voltage switch unit, and obtains a constant voltage start signal;

[0077] It should be noted that the voltage U2 of the polar capacitor C2 is obtained by measuring the voltage across the polar capacitor C2;

[0078] If the voltage U2 of polar capacitor C2 Controlling the starting voltage Uk indicates that the voltage U2 of the polar capacitor C2 in the energy storage unit meets the requirements of the constant voltage switch unit, and a constant voltage starting signal is generated;

[0079] If the voltage U2 of polar capacitor C2 The control start voltage Uk indicates that the voltage U2 of the polar capacitor C2 in the energy storage unit cannot meet the voltage condition required by the constant voltage switch unit, and the input protection unit is waiting to continue charging the polar capacitor C2 until the voltage across the polar capacitor C2 reaches the control start voltage Uk;

[0080] Data processing module: Based on the constant voltage start signal, the time point is used as the X-axis and the voltage is used as the Y-axis to draw the time-voltage change curve of the polar capacitor C2 in a two-dimensional rectangular coordinate system. Based on the time-voltage change curve, the voltage approach value Jz is obtained through processing and analysis, and a constant voltage working signal is generated according to the comparison result between the approach value and the approach threshold value;

[0081] Specifically, the capacitor voltage threshold is marked as Yz, the difference between the voltage U2 of the polar capacitor C2 and the capacitor voltage threshold is calculated, the difference is ratioed to the capacitor voltage threshold to obtain the voltage approach value Jz, and the voltage approach threshold is marked as Jy;

[0082] If Jz Jy, it indicates that the voltage of polar capacitor C2 is close to value Jz, which has reached the control circuit start voltage, but has not reached the voltage close to threshold value Jy, generating a constant voltage working signal;

[0083] If Jz Jy, it indicates that the voltage of polar capacitor C2 is close to value Jz, which has reached the control circuit opening voltage, and at the same time reaches the voltage close to the threshold Jy, sending a warning to the system and shutting down the circuit;

[0084] Voltage analysis module: Based on the constant voltage working signal, obtain the temperature Tf of the bridge wire FUSE, calculate the average temperature of the bridge wire, calculate the proximity value between the average temperature of the bridge wire and the fuse safety threshold, compare the proximity value with the fuse proximity threshold, and generate a fuse safety signal and a fuse warning signal;

[0085] Specifically, the bridge wire FUSE temperatures Tf at all time points are summed and averaged to obtain the bridge wire temperature average, the temperature difference between the bridge wire temperature average and the fuse safety threshold is calculated, the temperature difference is ratioed with the fuse safety threshold to obtain the bridge wire temperature approximation value, and the temperature approximation value is compared and analyzed with the temperature approximation threshold;

[0086] If the temperature approach value of the bridge wire is less than the temperature approach threshold, it means that the energy generated by the current flowing through the bridge wire FUSE is insufficient to cause the bridge wire FUSE to fuse, and a fuse safety signal is generated;

[0087] If the temperature of the bridge wire is close to If the temperature is close to the value, it means that the energy generated by the current flowing through the bridge wire FUSE may cause the bridge wire FUSE to melt, generating a fuse warning signal;

[0088] Change analysis module: Based on the fuse warning signal, the temperature of the fuse of the bridge wire FUSE is predicted and analyzed, the time-temperature change curve is drawn in the coordinate system, the linear reference coefficient Xc of the time-temperature change curve is calculated, and the change trend of the time-temperature change curve is judged according to the linear reference coefficient Xc of the time-temperature change curve, wherein the change trend includes linear change and nonlinear change;

[0089] Based on the fuse warning signal, the temperature change value of the bridge wire FUSE is obtained, and a time-temperature change curve is drawn in a two-dimensional rectangular coordinate system, with time as the X-axis and the temperature of the bridge wire as the Y-axis. The fuse threshold Rd of the bridge wire FUSE is used as a fuse reference line parallel to the X-axis;

[0090] Specifically, the time-temperature variation curve is divided into a plurality of sub-curve segments, and the slope of each sub-curve segment is calculated;

[0091] Connect the two ends of the time-temperature variation curve to obtain a reference line, measure the slope of the reference line, and compare the slope of the sub-curve segment with the slope of the reference line for positive and negative signs;

[0092] If the slope of the sub-curve segment has the same sign as the slope of the reference line, the sub-curve segment is marked as a curve segment with the same direction;

[0093] If the slope of the sub-curve segment is different from the slope of the reference line in sign, the sub-curve segment is marked as a non-co-directional curve segment;

[0094] Count the number of curve segments in the same direction and perform ratio processing with the number of sub-curve segments to obtain the ratio of the number of curve segments in the same direction and mark it as Tx.

[0095] Obtain the slopes of the curve segments in the same direction, integrate the slopes of all the curve segments in the same direction into a slope data group, calculate the variance value of the slope data group, and mark it as Fc;

[0096] By formula: Obtain the linear reference coefficient Xc of the time-temperature variation curve, where a and b are preset proportional coefficients;

[0097] Compare the linear reference coefficient Xc with the linear reference coefficient threshold:

[0098] If the linear reference coefficient Xc ≥ the linear reference coefficient threshold Xz, it indicates that the change trend of the time-temperature change curve is a linear change;

[0099] If the linear reference coefficient Xc is less than the linear reference coefficient threshold Xz, it indicates that the change trend of the time-temperature change curve is nonlinear;

[0100] Prediction and analysis module: Based on the changing trend of the time-temperature curve, the curve changing trend is divided into linear and nonlinear changes. The changing trend of the curve is processed and analyzed to obtain the predicted fusing time. According to the comparison result between the predicted fusing time and the safe fusing time, the safety status of the bridge wire FUSE is analyzed.

[0101] Specifically, based on the fact that the changing trend of the time-temperature changing curve is a linear change, the time-temperature changing curve is fitted by the least square method in a two-dimensional rectangular coordinate system to obtain a fitting straight line, and the fitting straight line is extended to make the fitting straight line intersect with the fuse reference line, and the time point corresponding to the intersection on the X-axis is obtained to obtain the predicted fuse time point, and the predicted fuse time point is differenced with the current time point to obtain the predicted fuse time;

[0102] Based on the nonlinear change trend of the time-temperature change curve, a sub-curve segment with a positive slope and the largest slope is obtained and marked as a target curve segment. The temperature values ​​corresponding to the two end points of the target curve segment are obtained, and the temperature difference is obtained by subtraction. The temperature difference is processed by ratio with the time length corresponding to the target curve segment to obtain the maximum temperature change rate;

[0103] The current temperature value is processed with the fuse threshold of the bridge wire FUSE to obtain the remaining temperature change value, and the remaining temperature change value is processed with the maximum temperature change rate to obtain the predicted fuse time;

[0104] Compare the predicted fusing time with the safe fusing time to analyze the fusing safety status of the bridge wire FUSE, specifically:

[0105] If the predicted fuse time is less than or equal to the fuse safety time, the alarm mechanism will be triggered immediately, a warning message will be sent to the operator, and the system will automatically stop all current related operations;

[0106] If the predicted fuse time of the bridge wire FUSE is greater than the fuse safety time, the system continues to run the monitoring program to maintain real-time monitoring of the bridge wire FUSE;

[0107] The technical solution of this embodiment is: obtain the voltage U2 of the polar capacitor C2, and compare it with the control start voltage Uk of the constant voltage switch unit to generate a constant voltage start signal. The module draws the time-voltage change curve of the polar capacitor C2 in a two-dimensional rectangular coordinate system, and analyzes to obtain the voltage approach value Jz. By comparing Jz with the approach threshold Jy, a constant voltage working signal is generated or a warning is sent to the system and the circuit is closed. Based on the constant voltage working signal, the temperature Tf of the bridge wire FUSE is obtained, the bridge wire temperature mean is calculated, and compared with the fuse safety threshold to generate a fuse safety signal or a fuse warning signal. Based on the fuse warning signal, the module predicts and analyzes the fuse temperature of the bridge wire FUSE, draws the time-temperature change curve, and calculates the linear reference coefficient Xc. By analyzing the comparison result of Xc and the linear reference coefficient threshold Xz, it is determined whether the change trend of the time-temperature change curve is linear or nonlinear. For linear changes, the time-temperature change curve is fitted by the least squares method to predict the fuse time point. For nonlinear changes, obtain the sub-curve segment with the largest slope and calculate the maximum temperature change rate to obtain the predicted fuse time, and compare the predicted fuse time with the safe fuse time to analyze the safety status of the bridge wire FUSE. If the predicted fuse time is less than or equal to the safe fuse time, the alarm mechanism is triggered and the operation is stopped; if the predicted time is greater than the safe fuse time, monitoring continues.

[0108] An embodiment of the present invention is described in detail above, but the content described is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A monitoring system for a control circuit, characterized in that: include: Input protection unit, energy storage unit, bridge wire unit and constant voltage switch unit; The input protection unit is connected to the energy storage unit, the energy storage unit is connected to the bridge wire unit, the energy storage unit includes a polar capacitor C2, the constant voltage switch unit is connected to the bridge wire unit, and the constant voltage switch unit is also connected to the energy storage unit; Data acquisition module: obtains the voltage of polar capacitor C2 and marks it as U2, compares the voltage U2 of polar capacitor C2 with the control start voltage Uk of the constant voltage switch unit, and obtains a constant voltage start signal; Data processing module: Based on the constant voltage start signal, the time point is used as the X-axis and the voltage is used as the Y-axis to draw the time-voltage change curve of the polar capacitor C2 in a two-dimensional rectangular coordinate system. Based on the time-voltage change curve, the voltage approach value Jz is obtained through processing and analysis, and a constant voltage working signal is generated according to the comparison result between the approach value and the approach threshold value; Voltage analysis module: Based on the constant voltage working signal, obtain the temperature Tf of the bridge wire FUSE, calculate the average temperature of the bridge wire, calculate the proximity value between the average temperature of the bridge wire and the fuse safety threshold, compare the proximity value with the fuse proximity threshold, and generate a fuse safety signal and a fuse warning signal; Change analysis module: Based on the fuse warning signal, the temperature of the fuse of the bridge wire FUSE is predicted and analyzed, the time-temperature change curve is drawn in the coordinate system, the linear reference coefficient Xc of the time-temperature change curve is calculated, and the change trend of the time-temperature change curve is judged according to the linear reference coefficient Xc of the time-temperature change curve, wherein the change trend includes linear change and nonlinear change; The linear reference coefficient Xc is obtained as follows: The linear reference coefficient is calculated based on the proportion of the number of curve segments in the same direction Tx and the variance Fc of the slope data group of the curve segments in the same direction; By formula: Obtain the linear reference coefficient Xc of the time-temperature variation curve, where a and b are preset proportional coefficients; Compare the linear reference coefficient Xc with the linear reference coefficient threshold: If the linear reference coefficient Xc ≥ the linear reference coefficient threshold Xz, it indicates that the change trend of the time-temperature change curve is a linear change; If the linear reference coefficient Xc is less than the linear reference coefficient threshold Xz, it indicates that the change trend of the time-temperature change curve is nonlinear; The method for obtaining the proportion Tx of the number of curve segments in the same direction and the variance Fc of the slope data group of the curve segments in the same direction is as follows: Based on the fuse warning signal, the temperature change value of the bridge wire FUSE is obtained, and a time-temperature change curve is drawn in a two-dimensional rectangular coordinate system, with time as the X-axis and the temperature of the bridge wire as the Y-axis. The fuse threshold Rd of the bridge wire FUSE is used as a fuse reference line parallel to the X-axis; Divide the time-temperature variation curve into multiple sub-curve segments, and calculate the slope of each sub-curve segment; Connect the two ends of the time-temperature variation curve to obtain a reference line, measure the slope of the reference line, and compare the slope of the sub-curve segment with the slope of the reference line for positive and negative signs; If the slope of the sub-curve segment has the same sign as the slope of the reference line, the sub-curve segment is marked as a curve segment with the same direction; If the slope of the sub-curve segment is different from the slope of the reference line in sign, the sub-curve segment is marked as a non-co-directional curve segment; Count the number of curve segments in the same direction and perform ratio processing with the number of sub-curve segments to obtain the ratio of the number of curve segments in the same direction and mark it as Tx. Obtain the slope of the same-direction curve segments, integrate the slopes of all the same-direction curve segments into a slope data group, calculate the variance value of the slope data group, and label it as Fc; Prediction and analysis module: Based on the changing trend of the time-temperature change curve, divide the curve changing trend into linear and non-linear changes, process and analyze the changing trend of the curve to obtain the fuse prediction time, and analyze the safety status of the bridge wire FUSE according to the comparison result between the fuse prediction time and the fuse safety time.

2. The monitoring system of a control circuit according to claim 1, wherein: The generation method of the constant-voltage start signal is: If the voltage U2 of the polar capacitor C2 ≥ the control start voltage Uk, it indicates that the voltage U2 of the polar capacitor C2 in the energy storage unit meets the requirements of the constant-voltage switch unit, and a constant-voltage start signal is generated; If the voltage U2 of the polar capacitor C2 < the control start voltage Uk, it indicates that the voltage U2 of the polar capacitor C2 in the energy storage unit cannot meet the voltage condition required by the constant-voltage switch unit, and wait for the input protection unit to continue charging the polar capacitor C2 until the voltage across the polar capacitor C2 reaches the control start voltage Uk.

3. The monitoring system of a control circuit according to claim 1, wherein: The generation method of the constant-voltage working signal is: If Jz < Jy, it indicates that the voltage approximation value Jz of the polar capacitor C2 has reached the control circuit turn-on voltage but has not reached the voltage approximation threshold Jy, and a constant-voltage working signal is generated; If Jz ≥ Jy, it indicates that the voltage approximation value Jz of the polar capacitor C2 has reached the control circuit turn-on voltage and at the same time reached the voltage approximation threshold Jy, send a warning to the system and turn off the circuit at the same time.

4. The monitoring system of a control circuit according to claim 1, wherein: The generation methods of the fuse safety signal and the fuse warning signal are: If the temperature approximation value of the bridge wire < the temperature approximation threshold, it indicates that the energy generated by the current flowing through the bridge wire FUSE at present is not enough to fuse the bridge wire FUSE, and a fuse safety signal is generated; If the temperature approximation value of the bridge wire ≥ the temperature approximation value, it indicates that the energy generated by the current flowing through the bridge wire FUSE at present may fuse the bridge wire FUSE, and a fuse warning signal is generated.

5. The monitoring system of a control circuit according to claim 1, wherein: The obtaining method of the fuse prediction time for linear change is: Based on the changing trend of the time-temperature change curve being linear, fit the time-temperature change curve by the least squares method in the two-dimensional rectangular coordinate system to obtain a fitting straight line, extend the fitting straight line so that the fitting straight line intersects with the fuse reference line, obtain the time point corresponding to the intersection point on the X-axis, obtain the predicted fuse time point, and perform a difference process on the predicted fuse time point and the current time point to obtain the fuse prediction time.

6. The monitoring system of a control circuit according to claim 1, wherein: The obtaining method of the fuse prediction time for non-linear change is: Based on the nonlinear change trend of the time-temperature change curve, a sub-curve segment with a positive slope and the largest slope is obtained and marked as a target curve segment. The temperature values ​​corresponding to the two end points of the target curve segment are obtained, and the temperature difference is obtained by subtraction. The temperature difference is processed by ratio with the time length corresponding to the target curve segment to obtain the maximum temperature change rate; The current temperature value is subjected to difference processing with the fuse threshold of the bridge wire FUSE to obtain the temperature remaining change value, and the temperature remaining change value is subjected to ratio processing with the maximum temperature change rate to obtain the fuse prediction time.

7. A control circuit monitoring system according to claim 1, characterized in that: The safe status of the bridge wire FUSE is determined as follows: Compare the predicted fusing time with the safe fusing time to analyze the fusing safety status of the bridge wire FUSE, specifically: If the predicted fuse time is less than or equal to the fuse safety time, the alarm mechanism will be triggered immediately, a warning message will be sent to the operator, and the system will automatically stop all current related operations; If the predicted blowing time of the bridge wire FUSE is greater than the blowing safety time, the system continues to run the monitoring program to maintain real-time monitoring of the bridge wire FUSE.

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