Real-time detonation signal generation circuit and detection method

Abstract

The invention belongs to the field of circuit detection, and provides a real-time detonation signal generation circuit and a detection method, and the method comprises the steps: transmitting a low-voltage instruction, carrying out the networking of an electronic delay module, and charging to enter a to-be-detonated state; the ignition high voltage generating circuit generates ignition high voltage, and load current caused by M6 conduction is generated on a gun line; starting exploder current detection, completing gun line current detection within a set time, analyzing and processing the change of gun line current to obtain a continuous characteristic value and an initiation current ratio, calculating, analyzing and processing the obtained continuous characteristic value and initiation current ratio to obtain a gun line current stable value, and dividing the gun line current stable value; the detonation current is compared with the reference current to obtain the starting moment, the delayed ignition time is the detonation moment, a real-time detonation signal is immediately sent to a detonation system after delay, abnormal problems possibly occurring in a circuit are detected and fed back in time, and the precision and reliability of detonation operation are improved.

Description

Technical Field

[0001] The invention belongs to the field of circuit detection, in particular to a real-time detonation signal generating circuit and a detection method. Background Art

[0002] In the civil explosives industry, long wires are usually used as firing lines to connect a number of electronic delay detonators. The detonator sends signals to each electronic delay detonator through the firing line, and each electronic delay detonator responds to the instructions sent by the detonator according to a specific protocol.

[0003] Generally, the communication between the detonator and the electronic delay detonator is divided into three stages: networking, charging, and detonation. Networking is time-consuming, and the detonators need to be connected and checked one by one. After the networking is completed, charging begins, and the detonator enters the ready-to-explode state after charging is completed. After ensuring safety, the blaster detonates the detonator. In some specific scenarios, it is necessary to know the exact time of detonation for subsequent operations, such as collecting seismic waves generated by the explosion.

[0004] In the laboratory, the time of explosion is usually collected by sound / photoelectricity. That is, a sound / photoelectric sensor is placed near the detonator to convert the sound or fire generated by the explosion into an electrical signal, and the time when the electrical signal suddenly changes is used as the detonation time. This is unreliable in field operations. First, there are various sound sources in the field, such as mechanical operations, animal calls, and the sounds of human activities. Exploration is generally carried out in deep pits, with a small amount of explosives and a long distance, so fire and sound are not easy to collect.

[0005] Therefore, it is of great significance to develop a real-time detonation signal generation circuit and detection method with high reliability and low risk.

[0006] A Chinese patent application with publication number CN114740939A discloses a power generation circuit, a chip and a voltage detection and compensation method for the power generation circuit, including: a reference circuit, configured to provide a reference voltage to an output loop; an output loop, configured to be connected to the reference circuit, and provide an output voltage to an output power supply terminal according to the reference voltage; and a voltage detection and compensation circuit, configured to be connected to the output power supply terminal and detect whether the output voltage changes, and compensate the output voltage when the output voltage changes, thereby quickly detecting the change in the output voltage and performing voltage compensation, thereby improving the response speed of the low voltage difference linear regulator to the output voltage change and improving the chip performance.

[0007] In the existing technology, the detonation technology may not be precise enough in controlling the blasting effect, and the safety and controllability are low. The detection of the detonation circuit is not accurate enough, and the accuracy and reliability are not high, resulting in excessive damage or failure to achieve the expected blasting effect, especially in complex geological conditions, increasing costs and risks.

[0008] To this end, the present invention provides a real-time detonation signal generating circuit and a detection method. Summary of the invention

[0009] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0010] The technical solution adopted by the present invention to solve the technical problem is: a real-time detonation signal generating circuit, comprising: The electronic delay module, the charging module, the detonation module, the detonation signal generating module, the discharge module and the anti-leakage diode D3 constitute the electronic delay module, and the electronic delay module forms the electronic delay detonator after being dipped in explosives and packaged; Send low-voltage command to network and charge the electronic delay module, and the electronic delay module enters the ready-to-explode state; Send a low voltage command, so that the second output IO2 of the electronic delay module is low, the first output IO1 is high, M5 is disconnected, the discharge module does not work, and the gate of M6 is high voltage; The detonator controls the ignition high voltage generating circuit to generate the ignition high voltage, the ignition NMOS tube M1 is turned on, the drain of M1 is low, so that the detonation signal detection NMOS tube M6 is turned on, and the load current caused by the conduction of M6 is generated on the gun line; After sending the ignition high voltage, start the detonator current detection, complete the gun line current detection within the set time, and record the detonation current; The detonation current is compared with the reference current. If it exceeds the set value, it is considered that this is the starting time of the bridge wire conduction. The delayed ignition time T0 is the detonation time. After the delay, a real-time detonation signal is immediately sent to the detonation system. As a further technical solution of the present invention, during communication, the low-voltage communication signal sent by the detonator enters the electronic delay module through the gun line A / B, and the networking is completed after confirming that the connection is correct. After the charging instruction is parsed by the electronic delay module, the output control signal CTRL is high, the first output and the second output are low, the charging control NMOS tube M4 and the charging PMOS tube M6 of the charging module are turned on, and the low-voltage current is charged to the ignition capacitor C1 through the anti-leakage diode D3 and the PMOS tube M6 and the charge and discharge current limiting resistor R3 and the bridge wire F1. After the set time, the ignition capacitor C1 is fully charged, and the electronic delay module enters the ready-to-explode state; The detonator sends a high-voltage excitation signal, which enters the detonation module through the gun line A / B. The high-voltage signal is stepped down by the Zener diode D4 and then divided by the voltage-dividing resistors R1 / R2. The breakdown voltage of D4 and the voltage-dividing ratio of R1 / R2 are selected to ensure that the ignition NMOS tube M1 can be turned on only when it is greater than the set high voltage. When M1 is turned on, the stored charge on C1 is quickly released through the bridge wire F1, thereby generating heat and detonating the ignition charge attached to the bridge wire F1. As a further technical solution of the present invention, when M1 is turned on, the drain of M1 is low, and the first output is set to high at this time, the detonation signal detection NMOS tube M6 is turned on, and the load resistor R8 is grounded through M1. The grounding of the load resistor R8 will cause the current on the gun line to change, and the detonator detects the current to obtain the starting time of the bridge wire turning on; When the blasting is canceled urgently, the detonator sends a low-voltage signal to the electronic delay module, so that the control signal CTRL is low, the second output is high, M4 is turned off, the charging module does not work, M5 is turned on, the discharge module works, and the charge of the ignition capacitor C1 is discharged; A real-time detonation signal generating circuit detection method, comprising: Acquire the current data of the detonator, which includes the current of the firing line, analyze and process the change of the firing line current, and obtain the continuous characteristic value and the detonation current ratio; The obtained continuous characteristic value and the detonation current ratio are processed by calculation and analysis to obtain the stable value of the gun line current; Based on the calculated shot line current stability value PX and the preset shot line current stability threshold, it is divided into different types; As a further technical solution of the present invention, the specific analysis process of measuring the current change of the firing line within 1 second is: The one-second time of measuring the shot line current is evenly divided into ten sections, each section is 0.1 seconds, the shot line current in each section is obtained, and the average shot line current measured in each section is taken to obtain the average shot line current in each section; As a further technical solution of the present invention, the process of obtaining the continuous eigenvalues ​​is as follows: Compare the average shot line current in each period with the reference current, mark the reference current as A0, record the first time period when the average shot line current exceeds the reference current and start timing, and from the first time period when the average shot line current exceeds the reference current, record the average shot line current exceeding the reference current and its continuity, and obtain a continuous characteristic value, which is marked as LX; As a further technical solution of the present invention, the marking process of the continuous feature values ​​is: If the average current of the firing line exceeds the reference current for three or more consecutive time periods within the set time, its continuous characteristic value is marked as 2; If the average current of the firing line does not exceed the reference current for three or more consecutive time periods within the set time, but the average firing line current exceeds the reference current, then the time will be delayed for three time periods, and the average firing line current will continue to be measured, and the average firing line current will be compared with the reference current; If the average current of the firing line exceeds the reference current for three or more consecutive time periods after the delay, its continuous characteristic value is marked as 2; If after the delay, there is still no average shot line current exceeding the reference current for three or more consecutive time periods, but there is an average shot line current exceeding the reference current, then its continuous characteristic value is marked as 1; If there is no average shot line current exceeding the reference current within the set time, its continuous characteristic value is marked as 0; As a further technical solution of the present invention, the specific process of obtaining the detonation current ratio is as follows: Obtain all average shot line currents exceeding the reference current within a set time and take the average value, perform ratio processing on the average value with the reference current to obtain the detonation current ratio, which is marked as QB; If all average shot line currents within the set time do not exceed the reference current, then the average of all average shot line currents within the set time is taken, and the average is processed with the reference current to obtain the detonation current ratio QB; As a further technical solution of the present invention, the specific process of obtaining the stable value of the firing line current is as follows: The obtained continuous characteristic value LX and detonation current ratio QB are subjected to data analysis and processing, and the formula is: Get the stable value of the line current PX, where: and All are preset correlation coefficients; As a further technical solution of the present invention, the specific comparison process of the shot line current stability value and the preset shot line current stability threshold is: If the gun line current stability value PX is greater than the gun line current stability threshold value PX1, it means that the detonation system is operating normally. After the ignition high voltage breaks down the NMOS tube M1 and turns it on, the NMOS tube M6 is also broken down and turns on. The gun line current change is monitored normally, and the detonation system predicts the detonation time normally. If the gun line current stability value PX is greater than the gun line current stability threshold value PX2 and less than the gun line current stability threshold value PX1, it means that the detonation system is detonated normally. After the ignition high voltage breaks down the NMOS tube M1 and turns it on, the NMOS tube M6 is broken down and turned on, which is abnormal. The gun line current change is monitored to be abnormal. The detonation system predicts the detonation time normally and feeds back the abnormality. If the gun line current stability value PX is less than the gun line current stability threshold value PX2, it means that the detonation system is operating abnormally. After the ignition high voltage breaks down the NMOS tube M1 and turns it on, the NMOS tube M6 is broken down and turned on abnormally. The gun line current change is monitored to be abnormal. The detonation system is abnormal and cannot detect a clear contrast relationship between the gun line current and the reference current. The detonation system cannot normally predict the detonation time and feedback the abnormality.

[0011] The beneficial effects of the present invention are as follows: 1. The charging instruction is parsed by the electronic delay module to ensure that the ignition capacitor C1 is fully charged within the set time, and the ignition NMOS tube M1 is turned on only when the high-voltage signal reaches the set value, thereby accurately controlling the detonation moment and reducing the risk of false triggering. Each module works independently, which is convenient for troubleshooting and maintenance. Communication and power supply are carried out through the gun line A / B. The standardized interface design makes the system easy to expand and upgrade. It has precise control, high safety, reliability and intelligent management, providing an efficient and safe solution for blasting operations.

[0012] 2. By sending low-voltage commands for networking and charging, unified management is facilitated. Low-voltage commands reduce the risk of accidental triggering, enhance the safety of the system, accurately control the working status of each component, avoid interference, improve the overall reliability of the system, reduce human errors, and enhance the intelligence level of the entire system. By accurately controlling current and signals to ensure the safety and controllability of the detonation process, the accuracy and reliability of blasting operations are improved, while also increasing the degree of automation of the system and reducing labor costs and risks.

[0013] 3. By detecting the gun line current within the set time, various factors may affect the detection results, resulting in deviations or abnormalities. The stable value of the gun line current is obtained by analyzing and processing the data, and it is compared with the preset gun line current stability threshold. It is divided into different types to improve the accuracy of gun line current detection and reduce data deviations caused by current instability. At the same time, the abnormal problems that may occur in the detection circuit are detected and feedback is given in time to reasonably reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a circuit principle diagram of a real-time detonation signal generating circuit of the present invention; Figure 2 It is a step flow chart of a real-time detonation signal detection method of the present invention. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Embodiment 1:

[0017] like Figure 1 As shown, the present invention provides a real-time detonation signal generating circuit, comprising: The electronic delay module 50, the charging module 60, the detonation module 70, the detonation signal generating module 80, the discharge module 90 and the anti-leakage diode D3 together constitute the electronic delay module, which forms the electronic delay detonator after being dipped in explosives and packaged; During communication, the low-voltage communication signal sent by the detonator enters the electronic delay module through the gun line A / B, and the networking is completed after the connection is confirmed to be correct. After the charging instruction is analyzed by the electronic delay module, the output control signal CTRL is high, the first output 101 and the second output 102 are low, and the charging control NMOS tube M4 and the charging PMOS tube M6 of the charging module are turned on. The low-voltage current charges the ignition capacitor C1 through the anti-leakage diode D3 and the charging PMOS tube M6, the charge and discharge current limiting resistor R3 and the bridge wire F1. After the set time, the ignition capacitor C1 is fully charged, and the electronic delay module enters the ready-to-explode state; The detonator sends a high-voltage excitation signal, which enters the detonation module through the gun line A / B. The high-voltage signal is stepped down by the Zener diode D4 and then divided by the voltage-dividing resistors R1 / R2. The breakdown voltage of D4 and the voltage-dividing ratio of R1 / R2 are selected to prevent false excitation by low-voltage signals. This ensures that the ignition NMOS tube M1 can be turned on only when it is greater than the set high voltage. When M1 is turned on, the stored charge on C1 is quickly released through the bridge wire F1, thereby generating heat and detonating the ignition charge attached to the bridge wire F1. When M1 is turned on, the drain of M1 is low. At this time, the first output IO1 is set to high, the detonation signal detection NMOS tube M6 is turned on, and the load resistor R8 is grounded through the ignition NMOS tube M1. The grounding of the load resistor R8 will cause the current on the gun line to change. The detonator detects the current to obtain the starting time of the bridge wire turning on; When the explosion is canceled urgently, the detonator sends a low-voltage signal to the electronic delay module, so that the control signal CTRL is low and the second output IO2 is high, the charging control NMOS tube M4 is turned off, the charging module does not work, the discharge NMOS tube M5 is turned on, and the discharge module works to discharge the charge of the ignition capacitor C1.

[0018] The technical solution of the embodiment of the present invention is as follows: the charging instruction is parsed by the electronic delay module. When the control signal CTRL is at a high level, the charging module starts to work to ensure that the ignition capacitor C1 is fully charged within the set time, and the charging time and the charging state of the capacitor are accurately controlled; when detonating, the detonator sends a high-voltage excitation signal, which is processed by the detonation module to ensure that the ignition NMOS tube M1 is turned on only when the high-voltage signal reaches the set value. At the same time, the detonation signal detection NMOS tube is turned on and a current signal for reaction detonation is generated on the gun line, so as to obtain a precise detonation time; the anti-leakage diode D3 prevents current leakage and improves the safety of the system; in an emergency, the detonator sends a low-voltage signal to make the control signal CTRL at a low level, and the second input The output is high level, thereby cutting off the operation of the charging module and activating the discharge module, discharging the charge of the ignition capacitor C1 to avoid accidental detonation; through the combination of the Zener diode D4 and the voltage-dividing resistor R1 / R2, it is ensured that the detonation is triggered only when the high-voltage signal reaches the set value, reducing the risk of false triggering, the ignition time T0 of the specific ignition capacitor and the bridge wire is relatively stable, and the detonator delays the ignition time according to the starting moment of the bridge wire conduction, thereby accurately predicting the detonation time, each module works independently, which is convenient for troubleshooting and maintenance, and communicates and powers the gun line A / B. The standardized interface design makes the system easy to expand and upgrade, with precise control, high security, reliability and intelligent management, providing an efficient and safe solution for blasting operations. Embodiment 2:

[0019] like Figure 1 As shown, the present invention provides a real-time detonation signal detection method, comprising: The first step is to network and charge the electronic delay module, including: Send low-voltage instructions to network and charge the electronic delay module. The electronic delay module enters the ready-to-explode state. The charging control NMOS tube M4 and the charging PMOS tube M6 are turned on. The electronic delay detonator is in a charging state to prevent charge leakage from the ignition capacitor when it is in the ready-to-explode state for a long time. The second step is to generate the detonation signal module, including: The initiator sends a low voltage command, so that the second output IO2 of the electronic delay module is low, the first output IO1 is high, the discharge NMOS tube M5 is disconnected, the discharge module does not work, and the gate of M6 is high voltage; The third step is to generate the detonation high pressure detonation, including: The detonator controls the ignition high voltage generating circuit to generate the ignition high voltage, the ignition NMOS tube M1 is turned on, and the drain of M1 is low, so that the ignition signal detection NMOS tube M6 is turned on through the ignition NMOS tube M1, and the load current caused by the conduction of M6 is generated on the gun line; The fourth step is that the detonator detects the current of the gun line, including: After sending the ignition high voltage, start the detonator current detection, complete the gun line current detection within the set time, and record the detonation current; The fifth step, data processing, includes: The detonation current is compared with the reference current. If it exceeds the set value, it is considered that this is the starting time of the bridge wire conduction. The delayed ignition time T0 is the detonation time. After the delay, a real-time detonation signal is immediately sent to the detonation system. The technical solution of the embodiment of the present invention is: by sending low-voltage instructions to carry out networking and charging, remote control is realized, the risk of human operation is reduced, and at the same time, all electronic delay modules are ensured to be in a consistent working state, which is convenient for unified management. The low-voltage instructions reduce the risk of accidental triggering and enhance the safety of the system. By controlling the state changes of signals and outputs, the working state of each component is accurately controlled to ensure that all preparations are completed before detonation, and unnecessary circuits such as charging modules are disconnected to avoid interference, thereby improving the overall reliability of the system. A dedicated ignition high-voltage generating circuit is used to trigger detonation to ensure the energy consistency of each detonation, which is very important for applications requiring highly precise control. The NMOS tube is turned on to generate the current required for detonation, respond quickly and provide the necessary energy, and real-time detection of the gun line current helps to confirm whether the detonation is successful and whether there are any abnormalities in the detonation process. Timely recording of the detonation current is helpful for subsequent data analysis and troubleshooting. By comparing the collected detonation current with the reference current, the detonation time is accurately determined, and then the various parameter settings in the detonation process are optimized. Automated data processing reduces manual errors and improves the intelligence level of the entire system. The safety and controllability of the detonation process are ensured by precisely controlling the current and signal, which improves the accuracy and reliability of the blasting operation, while also increasing the degree of automation of the system and reducing labor costs and risks. Embodiment 3:

[0020] like Figure 1 As shown, the present invention provides a real-time detonation signal detection method, comprising: Based on Example 1, the present invention detects the gun line current and records the ignition current. However, the circuit current is usually unstable. Within the set time, the authenticity of the recorded ignition current value is biased, resulting in a deviation in the result after data processing, which affects the progress and wastes resources. Therefore, the embodiment of the present invention optimizes and analyzes the measurement of the gun line current, such as Figure 2 As shown, a real-time detonation signal generating circuit detection method according to an embodiment of the present invention includes: Based on the detonator controlling the ignition high voltage generating circuit to generate the ignition high voltage, after the NMOS tube M1 is turned on, the current data of the detonator is obtained, and the current data of the detonator includes the gun line current. The change of the gun line current is analyzed and processed to obtain the continuous characteristic value and the detonation current ratio. The obtained continuous characteristic value and the detonation current ratio are processed by calculation and analysis to obtain the stable value of the gun line current; It should be noted that the resistance of the NMOS tube in the on state is affected by multiple factors, including: the breakdown voltage that causes the NMOS tube to be turned on, the ambient temperature of the NMOS tube, the effect of the aging of the NMOS tube, and the effect of the manufacturing process of the NMOS tube. Therefore, the resistance of the NMOS tube is unstable after being turned on. Similarly, the circuit current after being turned on is also unstable. In some embodiments, based on the detonator controlling the ignition high voltage generating circuit to generate the ignition high voltage, the ignition NMOS tube is turned on, a load current caused by the conduction of M6 is generated on the gun line, and the current change of the gun line within 1 second is measured after the ignition high voltage is generated; Specifically, the one-second time for measuring the shot line current is evenly divided into ten sections, each section is 0.1 seconds, the shot line current in each section is obtained, and the average of the shot line current measured in each section is taken to obtain the average shot line current A1...A10 in each section; It should be noted that the sampling frequency of measuring the current of the firing line in each period of time is once every 1ms. In order to measure the change of current more accurately, the number of average segments and sampling frequency of measuring the firing line current within 1 second can be adjusted. Compare the average shot line current in each period with the reference current, mark the reference current as A0, record the first time period when the average shot line current exceeds the reference current and start timing, and from the first time period when the average shot line current exceeds the reference current, record the average shot line current exceeding the reference current and its continuity, analyze and obtain the continuous characteristic value, and mark it as LX; If the average current of the firing line exceeds the reference current for three or more consecutive time periods within the set time, its continuous characteristic value is marked as 2; If the average current of the firing line does not exceed the reference current for three or more consecutive time periods within the set time, but the average firing line current exceeds the reference current, then the time will be delayed for three time periods, and the average firing line current will continue to be measured, and the average firing line current will be compared with the reference current; If the average shot line current exceeds the reference current for three or more consecutive time periods after the delay, its continuous characteristic value is marked as 2; If after the delay, there is still no average shot line current exceeding the reference current for three or more consecutive time periods, but there is an average shot line current exceeding the reference current, then its continuous characteristic value is marked as 1; If there is no average shot line current exceeding the reference current within the set time, its continuous characteristic value is marked as 0; It should be noted that the reference current A0 represents the maximum current that cannot turn on the NMOS tube, and the continuous characteristic value represents whether there are three consecutive time periods when the average shot line current exceeds the reference current and the corresponding values. The specific situation where the average shot line current exceeds the reference current is assigned a value and quantitatively analyzed, which is conducive to analyzing and processing data and more intuitively reflects the current change. The value size indicates that the current change conforms to the degree of normal initiation. The larger the continuous characteristic value, the more the circuit current conforms to the normal initiation current. Obtain all average shot line currents exceeding the reference current within a set time and take the average value, perform ratio processing on the average value with the reference current to obtain the detonation current ratio, which is marked as QB; If all average shot line currents within the set time do not exceed the reference current, then the average of all average shot line currents within the set time is taken, and the average is processed with the reference current to obtain the detonation current ratio QB; It should be noted that the set time represents the total time for measuring and recording the current of the firing line, including the time for delay due to special circumstances; The obtained continuous characteristic value LX and detonation current ratio QB are subjected to data analysis and processing, and the formula is: Get the stable value of the line current PX, where: and All are preset correlation coefficients; It should be noted that: the stable value PX of the firing line current is calculated by analyzing and processing the continuous characteristic value LX and the detonation current ratio QB, which reflects the stability of the firing line current after the initiator sends a high-voltage excitation signal. The continuous characteristic value LX reflects the situation that the NMOS tube M6 is broken down and turned on after the NMOS tube M1 is broken down and turned on, and the detonation current ratio QB reflects the real-time specific situation of the firing line current. In some embodiments, based on the calculated shot line current stability value PX being compared with a preset shot line current stability threshold, it is divided into different types; If the gun line current stability value PX is greater than the gun line current stability threshold value PX1, it means that the detonation system is operating normally. After the ignition high voltage breaks down the NMOS tube M1 and turns it on, the NMOS tube M6 is also broken down and turns on. The gun line current change is monitored normally, and the detonation system predicts the detonation time normally. If the gun line current stability value PX is greater than the gun line current stability threshold value PX2 and less than the gun line current stability threshold value PX1, it means that the detonation system is detonated normally. After the ignition high voltage breaks down the NMOS tube M1 and turns it on, the NMOS tube M6 is broken down and turned on, which is abnormal. The gun line current change is monitored to be abnormal. The detonation system predicts the detonation time normally and feeds back the abnormality. If the gun line current stability value PX is less than the gun line current stability threshold value PX2, it means that the detonation system is operating abnormally. After the ignition high voltage breaks down the NMOS tube M1 and turns it on, the NMOS tube M6 is broken down and turned on abnormally. The gun line current change is monitored to be abnormal. The detonation system is abnormal and cannot detect the obvious comparison relationship between the gun line current and the reference current. The detonation system cannot normally predict the detonation time and feedback the abnormality. It should be noted that the preset shot line current stability threshold is an empirical value set by professional and technical personnel in this field based on experimental data and practical experience. By comparing the shot line current stability value with the shot line current stability threshold, the corresponding situation of the shot line current change is clearly reflected, which is conducive to timely discovering the cause of the problem and solving the abnormality; The technical solution of the embodiment of the present invention is as follows: by detecting the gun line current within the set time, the gun line current is affected by various factors, resulting in deviation or abnormality in the detection result. Under the premise of not changing its original function, the detection of the gun line current is optimized, and the possible abnormality is more accurately judged by extending the short detection time. The set time of measuring the gun line current is 1 second and evenly divided into ten time periods, the gun line current in each time period is obtained, and the gun line current measured in each time period is averaged to obtain the average gun line current in each time period, and the average gun line current in each time period is compared with the reference current, and the average gun line current exceeding the reference current and its continuity are recorded to obtain a continuous characteristic value, and all the average gun line currents exceeding the reference current within the set time are averaged. If all the average gun line currents within the set time do not exceed the reference current, then all the average gun line currents within the set time are averaged to obtain their initiation current ratio, and the gun line current stability value is obtained by analyzing and processing the data, and the gun line current stability value is compared with the preset gun line current stability threshold value, and it is divided into different types, so as to improve the accuracy of gun line current detection, reduce data deviation caused by current instability, and detect abnormal problems that may occur in the circuit and feedback them in time, so as to reasonably reduce costs.

[0021] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles 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 real-time detonation signal generating circuit, characterized in that: include: The electronic delay module, the charging module, the detonation module, the detonation signal generating module, the discharge module and the anti-leakage diode D3 constitute the electronic delay module, and the electronic delay module forms the electronic delay detonator after being dipped in explosives and packaged; Send low-voltage command to network and charge the electronic delay module, and the electronic delay module enters the ready-to-explode state; Send a low voltage command, so that the second output of the electronic delay module is low and the first output is high, M5 is disconnected, the discharge module does not work, and the M6 ​​gate is high voltage; The detonator controls the ignition high voltage generating circuit to generate the ignition high voltage, the ignition NMOS tube M1 is turned on, the drain of M1 is low, so that the detonation signal detection NMOS tube M6 is turned on, and the load current caused by the conduction of M6 is generated on the gun line; After sending the ignition high voltage, start the detonator current detection, complete the gun line current detection within the set time, and record the detonation current; The detonation current is compared with the reference current. If it exceeds the set value, it is considered that this is the starting moment of the bridge wire conduction. The delayed ignition time T0 is the detonation moment. After the delay, a real-time detonation signal is immediately sent to the detonation system.

2. A real-time detonation signal generating circuit according to claim 1, characterized in that: During communication, the low-voltage communication signal sent by the detonator enters the electronic delay module through the gun line A / B, and the networking is completed after the connection is confirmed to be correct. After the charging instruction is analyzed by the electronic delay module, the output control signal CTRL is high, the first output and the second output are low, and the charging control NMOS tube M4 and the charging PMOS tube M6 of the charging module are turned on. The low-voltage current charges the ignition capacitor C1 through the anti-leakage diode D3 and the charging PMOS tube M6, the charge and discharge current limiting resistor R3 and the bridge wire F1. After the set time, the ignition capacitor C1 is fully charged, and the electronic delay module enters the ready-to-explode state; The detonator sends a high-voltage excitation signal, which enters the detonation module through the gun line A / B. The high-voltage signal is stepped down by the Zener diode D4 and then divided by the voltage-dividing resistors R1 / R2. The breakdown voltage of D4 and the voltage-dividing ratio of R1 / R2 are selected to prevent false excitation of low-voltage signals. This ensures that the ignition NMOS tube M1 can be turned on only when the voltage is greater than the set high voltage. When M1 is turned on, the stored charge on C1 is quickly released through the bridge wire F1, thereby generating heat and detonating the ignition charge attached to the bridge wire F1.

3. A real-time detonation signal generating circuit according to claim 1, characterized in that: When M1 is turned on, the drain of M1 is low. At this time, the first output is set to high, the detonation signal detection NMOS tube M6 is turned on, and the load resistor R8 is grounded through the ignition NMOS tube M1. The grounding of the load resistor R8 will cause the current on the gun line to change. The starting time of the bridge wire conduction is obtained by detecting the current of the detonator; When the explosion is canceled urgently, the detonator sends a low-voltage signal to the electronic delay module, so that the control signal CTRL is low and the second output is high, M4 is turned off, the charging module does not work, M5 is turned on, and the discharge module works to discharge the charge of the ignition capacitor C1.

4. A real-time detonation signal generating circuit detection method, characterized in that: Acquire the current data of the detonator, which includes the current of the firing line, analyze and process the change of the firing line current, and obtain the continuous characteristic value and the detonation current ratio; The obtained continuous characteristic value and the detonation current ratio are processed by calculation and analysis to obtain the stable value of the gun line current; Based on the comparison between the calculated shot line current stability value PX and the preset shot line current stability threshold, they are divided into different types.

5. A real-time detonation signal generating circuit detection method according to claim 4, characterized in that: The specific analysis process of measuring the current change of the gun line within 1 second is: The one-second time for measuring the gun line current is evenly divided into ten sections, each section is 0.1 second, the gun line current in each section is obtained, and the average of the gun line current measured in each section is taken to obtain the average gun line current in each section.

6. A real-time detonation signal generating circuit detection method according to claim 4, characterized in that: The process of obtaining the continuous eigenvalues ​​is as follows: Compare the average shot line current in each period with the benchmark current, mark the benchmark current as A0, record the first time period when the average shot line current exceeds the benchmark current and start timing, and from the first time period when the average shot line current exceeds the benchmark current, record the average shot line current exceeding the benchmark current and its continuity to obtain a continuous characteristic value, which is marked as LX.

7. A real-time detonation signal generating circuit detection method according to claim 4, characterized in that: The labeling process of the continuous eigenvalues ​​is: If the average current of the firing line exceeds the reference current for three or more consecutive time periods within the set time, its continuous characteristic value is marked as 2; If the average current of the firing line does not exceed the reference current for three or more consecutive time periods within the set time, but the average firing line current exceeds the reference current, then the time will be delayed for three time periods, and the average firing line current will continue to be measured, and the average firing line current will be compared with the reference current; If the average current of the firing line exceeds the reference current for three or more consecutive time periods after the delay, its continuous characteristic value is marked as 2; If after the delay, there is still no average shot line current exceeding the reference current for three or more consecutive time periods, but there is an average shot line current exceeding the reference current, then its continuous characteristic value is marked as 1; If there is no average line current exceeding the reference current within the set time, its continuous characteristic value is marked as 0.

8. A real-time detonation signal generating circuit detection method according to claim 4, characterized in that: The specific process of obtaining the detonation current ratio is as follows: Obtain all average shot line currents exceeding the reference current within a set time and take the average value, perform ratio processing on the average value with the reference current to obtain the detonation current ratio, which is marked as QB; If all average shot line currents within the set time do not exceed the reference current, then the average of all average shot line currents within the set time is taken, and the average is compared with the reference current to obtain the detonation current ratio QB.

9. A real-time detonation signal generating circuit detection method according to claim 4, characterized in that: The specific process of obtaining the stable value of the firing line current is as follows: The obtained continuous characteristic value LX and detonation current ratio QB are subjected to data analysis and processing, and the formula is: Get the stable value of the line current PX, where: and All are preset correlation coefficients.

10. A real-time detonation signal generating circuit detection method according to claim 4, characterized in that: The specific comparison process of the shot line current stability value and the preset shot line current stability threshold is: If the gun line current stability value PX is greater than the gun line current stability threshold value PX1, it means that the detonation system is operating normally. After the ignition high voltage breaks down the NMOS tube M1 and turns it on, the NMOS tube M6 is also broken down and turns on. The gun line current change is monitored normally, and the detonation system predicts the detonation time normally. If the gun line current stability value PX is greater than the gun line current stability threshold value PX2 and less than the gun line current stability threshold value PX1, it means that the detonation system is detonated normally. After the ignition high voltage breaks down the NMOS tube M1 and turns it on, the NMOS tube M6 is broken down and turned on, which is abnormal. The gun line current change is monitored to be abnormal. The detonation system predicts the detonation time normally and feeds back the abnormality. If the gun line current stability value PX is less than the gun line current stability threshold value PX2, it means that the detonation system is operating abnormally. After the ignition high voltage breaks down the NMOS tube M1 and turns it on, the NMOS tube M6 is broken down and turned on abnormally. The gun line current change is monitored to be abnormal. The detonation system is abnormal and cannot detect a clear contrast relationship between the gun line current and the reference current. The detonation system cannot normally predict the detonation time and feedback the abnormality.

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