Electronic detonator control module

Abstract

This invention proposes an electronic detonator control module, relating to the field of electronic detonators. It includes a circuit board, a left-pin input terminal, and a right-pin input terminal. The left and right pin input terminals are connected to one end of the circuit board via left-pin and right-pin pads, respectively; both the left and right pin pads are serrated; a differential mode discharge module is provided between the left and right pin input terminals; a positive half-bridge module is provided at the input terminal of the main control chip on the circuit board; Y-discharge capacitors are introduced between the left and reference ground, and between the right and reference ground, respectively; after the electronic detonator receives a detonation command, the main control chip, through the data transmission circuit in the communication module, controls the left and right pin input terminals of the main control chip to be short-circuited; and shuts down the charging control circuit of the main control chip for the detonation capacitor. This invention can reduce interference in the electronic detonator and avoid mis-detonation.

Description

Technical Field

[0001] This invention relates to the field of electronic detonators, and more specifically, to an electronic detonator control module. Background Technology

[0002] With the development of electronic detonator technology, the application of electronic detonators in various environments is becoming increasingly widespread. However, some problems in networked blasting operations, such as misfires, post-blast failures, and failures after insertion, are gradually being exposed. These failures are usually closely related to environmental electrostatic discharge (ESD) and electromagnetic pulse (EMP) phenomena. Particularly in sequential blasting operations, the explosion of the first borehole generates an ionosphere, producing complex electromagnetic induction pulses on the blast zone bus and the leads of the subsequent detonators. When the electronic module of the subsequent electronic detonator cannot withstand the EMP pulses generated by the explosion, it can cause permanent or temporary failure of the electronic delay module, leading to misfires. Since the intensity of electromagnetic interference is inversely proportional to the square of the distance, the smaller the distance, the stronger the interference. Therefore, in small-spaced metal tunnels, misfires caused by this interference are particularly pronounced. Because the detonator casing is metal, external interference can usually only be conducted into the interior through the detonator leads, manifesting as both common-mode and differential-mode surge conduction interference. Therefore, it is currently necessary to design an electronic detonator control module to reduce interference and avoid misfires. Summary of the Invention

[0003] The purpose of this invention is to provide an electronic detonator control module that can reduce interference with electronic detonators and avoid misfires.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] This application provides an electronic detonator control module, which includes a circuit board, a left-pin input terminal and a right-pin input terminal. The left-pin input terminal and the right-pin input terminal are respectively connected to one end of the circuit board through the left-pin pad and the right-pin pad; (1) The left-pin pad and the right-pin pad are both sawtooth-shaped; (2) A differential mode discharge module is provided between the left-pin input terminal and the right-pin input terminal; (3) A positive half-bridge module is provided at the input end of the main control chip on the circuit board; (4) Y discharge capacitors are introduced between the left-pin input terminal and the reference ground, and between the right-pin input terminal and the reference ground; (5) After the electronic detonator receives the detonation command, the main control chip (A) controls the data transmission circuit in the communication module to make the left-pin input terminal and the right-pin input terminal of the main control chip short-circuited; (B) turns off the charging control circuit of the main control chip to the detonation capacitor, so that the charging path of the detonation capacitor is in a high-resistance state.

[0006] In some embodiments of the present invention, the differential mode venting module includes a gas discharge tube, a varistor, and a differential mode suppression pair.

[0007] In some embodiments of the present invention, the above-mentioned positive half-bridge module uses Zener diodes or Schottky diodes to generate the positive output of the bridge.

[0008] In some embodiments of the present invention, one end of the positive half-bridge module is connected to the INA pin of the input terminal of the main control chip, and the other end is connected to the INB pin of the input terminal of the main control chip. The positive output of the positive half-bridge module is connected to the C1 pin of the main control chip.

[0009] In some embodiments of the present invention, one end of the differential mode bleeder module is connected to the INA pin through a first resistor R1, and the other end of the differential mode bleeder module is connected to the INB pin through a second resistor R2; one end of the positive half-bridge module is connected between the first resistor R1 and the INA pin, and the other end is connected between the second resistor R2 and the INB pin.

[0010] In some embodiments of the present invention, the above-mentioned electronic detonator control module includes a first energy storage capacitor C1 and a second energy storage capacitor C2; one end of the first energy storage capacitor C1 is connected between the positive output of the positive half-bridge module and the C1 pin, and the other end of the first energy storage capacitor C1 is connected to reference ground; the second energy storage capacitor C2 is connected between the VOUT pin of the main control chip and reference ground.

[0011] In some embodiments of the present invention, the above-mentioned electronic detonator control module includes a first discharge capacitor C4 and a second discharge capacitor C5; one end of the first discharge capacitor C4 is connected between the first resistor R1 and the INA pin, and the other end of the first discharge capacitor C4 is connected to reference ground; the second discharge capacitor C5 is connected between the VOUT pin of the main control chip and reference ground.

[0012] In some embodiments of the present invention, the above-mentioned electronic detonator control module includes an ignition element F; one end of the ignition element F is connected to the C2 pin of the main control chip, and the other end of the ignition element F is connected to the FIN pin of the main control chip.

[0013] In some embodiments of the present invention, the above-mentioned electronic detonator control module includes a BIT detection circuit; the BIT detection circuit is used to detect the state of the second energy storage capacitor C2 and the ignition element F, and to determine whether different parts of the circuit are in normal working condition based on different control states and the output results of the BIT detection circuit.

[0014] In some embodiments of the present invention, the above-mentioned electronic detonator control module includes a digital logic control circuit; the digital logic control circuit is used to receive and parse externally input digital instruction signals and execute actions corresponding to the instructions.

[0015] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0016] (1) Both the left and right pin pads are serrated, thus adding a discharge spike design to the PCB input end of the module to discharge strong interference through the tip discharge;

[0017] (2) A differential mode discharge module is set between the left and right pins of the module to increase the discharge measures and discharge the excessive input differential mode voltage;

[0018] (3) A positive half-bridge module is set at the input end of the chip, which not only limits the input voltage, but also acts as a rectifier half-bridge.

[0019] (4) A Y-discharge capacitor is introduced between the pin input and the module reference ground to discharge the common-mode input interference voltage;

[0020] (5) When designing the chip, the characteristic of receiving the detonation command simultaneously when the electronic detonator is networked is utilized. After the electronic detonator receives the detonation command, the data transmission circuit in the communication module is used to make the two input shorts of the chip short-circuited to discharge the differential voltage that may be introduced. In addition, the charging control circuit of the chip to the detonation capacitor is turned off, so that the charging path of the detonation capacitor is in a high-resistance state, and surge pulse interference is prevented from being conducted to the back end of the chip. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a circuit diagram of the electronic detonator control module according to Embodiment 1 of the present invention;

[0023] Figure 2 This is a circuit diagram of the main control chip in Embodiment 1 of the present invention;

[0024] Figure 3 This is a flowchart of the electronic detonator control module in Embodiment 1 of the present invention;

[0025] Figure 4 This is a schematic diagram of the electronic device in Embodiment 2 of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Example 1

[0028] Please see Figures 1-3 , Figures 1-3 The diagram shows a schematic of the electronic detonator control module provided in the embodiment of this application. The electronic detonator control module includes a circuit board, a left-pin input terminal and a right-pin input terminal. The left-pin input terminal and the right-pin input terminal are respectively connected to one end of the circuit board through the left-pin pad and the right-pin pad; (1) The left-pin pad and the right-pin pad are both sawtooth-shaped; (2) A differential mode discharge module is provided between the left-pin input terminal and the right-pin input terminal; (3) A positive half-bridge module is provided at the input end of the main control chip on the circuit board; (4) Y discharge capacitors are introduced between the left-pin input terminal and the reference ground, and between the right-pin input terminal and the reference ground; (5) After the electronic detonator receives the detonation command, the main control chip (A) controls the data transmission circuit in the communication module to make the left-pin input terminal and the right-pin input terminal of the main control chip short-circuited; (B) turns off the charging control circuit of the main control chip to the detonation capacitor, so that the charging path of the detonation capacitor is in a high-resistance state.

[0029] (1) Both the left and right pin pads are sawtooth-shaped, thus adding a discharge spike design to the PCB input end of the module to discharge strong interference through tip discharge; (2) A differential mode discharge module is set between the left and right pins of the module to increase discharge measures and discharge excessively high input differential mode voltage; (3) A positive half-bridge module is set at the input end of the chip, which not only limits the input voltage but also acts as a rectifier half-bridge; (4) A Y discharge capacitor is introduced between the pin input and the reference ground of the module to discharge common mode input interference voltage; (5) When designing the chip, the characteristic of receiving detonation commands simultaneously when the electronic detonator is networked is utilized. After the electronic detonator receives the detonation command, the data transmission circuit in the communication module is used to short-circuit the two inputs of the chip to discharge the differential mode voltage that may be introduced; and the charging control circuit of the chip to the detonation capacitor is turned off. In this case, the two inputs of the chip are short-circuited, that is, the TXD signal is high and the INA and INB inputs are short-circuited.

[0030] In some embodiments of the present invention, the differential mode venting module includes a gas discharge tube, a varistor, and a differential mode suppression pair.

[0031] In some embodiments of the present invention, the above-mentioned positive half-bridge module uses Zener diodes or Schottky diodes to generate the positive output of the bridge.

[0032] In some embodiments of the present invention, one end of the positive half-bridge module is connected to the INA pin of the input terminal of the main control chip, and the other end is connected to the INB pin of the input terminal of the main control chip. The positive output of the positive half-bridge module is connected to the C1 pin of the main control chip.

[0033] The positive half-bridge is located outside the main control chip, using a Zener diode or Schottky diode to generate the positive output of the bridge and limit the voltage input of INA and INB for input protection. Optionally, the third resistors R3 and R4 limit the maximum discharge current of C1 and C2 respectively, preventing the main control chip from rapidly discharging the stored energy in the capacitors simultaneously when external pulse interference occurs due to the input buffer discharge. The positive output of the positive half-bridge module is connected to the C1 pin of the main control chip through the third resistor R3.

[0034] In some embodiments of the present invention, one end of the differential mode bleeder module is connected to the INA pin through a first resistor R1, and the other end of the differential mode bleeder module is connected to the INB pin through a second resistor R2; one end of the positive half-bridge module is connected between the first resistor R1 and the INA pin, and the other end is connected between the second resistor R2 and the INB pin.

[0035] Among them, the first resistor R1 and the second resistor R2 limit the maximum input current and prevent the normal communication of other detonators in the electronic detonator network from being affected in the event that the INA pin and INB pin of the chip are abnormally short-circuited.

[0036] In some embodiments of the present invention, the above-mentioned electronic detonator control module includes a first energy storage capacitor C1 and a second energy storage capacitor C2; one end of the first energy storage capacitor C1 is connected between the positive output of the positive half-bridge module and the C1 pin, and the other end of the first energy storage capacitor C1 is connected to reference ground; the second energy storage capacitor C2 is connected between the VOUT pin of the main control chip and the reference ground. Optionally, the reverse discharge of the second energy storage capacitor C2 is limited by diode D1, thereby improving the consistency of the ignition voltage of the detonating capacitor C2.

[0037] In some embodiments of the present invention, the above-mentioned electronic detonator control module includes a first discharge capacitor C4 and a second discharge capacitor C5; one end of the first discharge capacitor C4 is connected between the first resistor R1 and the INA pin, and the other end of the first discharge capacitor C4 is connected to reference ground; the second discharge capacitor C5 is connected between the VOUT pin of the main control chip and reference ground.

[0038] The Y-shaped discharge capacitors are the first discharge capacitor C4 and the second discharge capacitor C5, which are connected in a Y-shape to the reference ground of the first energy storage capacitor C1 and the second energy storage capacitor C2, respectively.

[0039] In some embodiments of the present invention, the above-mentioned electronic detonator control module includes an ignition element F; one end of the ignition element F is connected to the C2 pin of the main control chip, and the other end of the ignition element F is connected to the FIN pin of the main control chip.

[0040] The ignition element F is used to quickly convert the electrical energy stored in the second energy storage capacitor C2 into heat energy under the control of the main control chip, so as to ignite or detonate the ignition charge of the electronic detonator.

[0041] In some embodiments of the present invention, the above-mentioned electronic detonator control module includes a BIT detection circuit; the BIT detection circuit is used to detect the state of the second energy storage capacitor C2 and the ignition element F, and to determine whether different parts of the circuit are in normal working condition based on different control states and the output results of the BIT detection circuit.

[0042] In some embodiments of the present invention, the above-mentioned electronic detonator control module includes a digital logic control circuit; the digital logic control circuit is used to receive and parse externally input digital instruction signals and execute actions corresponding to the instructions.

[0043] Optionally, in applications where delay accuracy is not high, a decoupling capacitor C3 can be added to improve the working stability of the digital capacitor and the stability of the OSC. Optionally, the main control chip is used to receive and parse external commands, manage the detonation energy of the electronic detonator according to the commands, set the delay time, and detect the ignition circuit and ignition energy using the first discharge capacitor C4 and the second discharge capacitor C5; it also discharges the common-mode high-frequency pulse generated by the explosion.

[0044] Figure 2The first circuit diagram from top to bottom shows the negative half-bridge generating the module's signal ground based on the signal grounds of the INA and INB pins. The communication interface converts the differential signals input from the INA and INB pins into a pair of digital signals RXD and RXD with opposite polarities, recognizable by digital logic. Under the control of the data transmission signal TXD output by the digital logic, it transmits digital signals externally in the form of short-circuiting and opening between INA and INB; a hysteresis comparator is preferred for communication reception. The charging control circuit disables charging before the power supply and RST signals are established, preventing charging of the detonating capacitor during power-up and improving module safety. After power is established, the CHG signal controls the charging of the detonating capacitor C2 via the differential power supply between INA and INB or the input of pin C1.

[0045] Figure 2 The second circuit diagram from top to bottom shows the power supply system, which includes a BandGAP reference source (converting the power input of C1 to a 1.23V reference power supply, providing a constant charging and discharging current to the OSC to improve the stability of the OSC, and providing power to the BIT detection circuit to detect the charging voltage of capacitor C2); a DC / DC converter (converting the power input of C1 to a stable power supply required for the operation of the digital circuit); a reset circuit (converting the power-on process of capacitor C1 into a reset signal output, providing a definite signal to the digital circuit during the reset process, and providing a signal to the charging control circuit to disable charging).

[0046] Figure 2 The third circuit diagram from top to bottom shows the BIT detection circuit, which detects the state of the detonating capacitor C2 and the connection status of the ignition element F. Based on the different control states of the charging control circuit, the safety discharge circuit, and the ignition circuit, and the output results of the BIT detection circuit, it determines whether these three circuits are operating normally. The BIT detection can determine the safe voltage connected to the ignition element, the communication voltage between external equipment and the detonator, and the minimum voltage required for reliable ignition of the detonator by detecting three different voltage values ​​of capacitor C2. The safety discharge circuit is used to force a safety discharge before power establishment, ensuring the safety of the power establishment process. Under normal tooling conditions, the digital logic outputs the DISC1 signal, indicating a small-current safety discharge state. In an emergency, DISC1 and DISC2 together indicate a larger current discharge state, releasing the energy stored in capacitor C2. The ignition circuit outputs the FIRE signal under digital logic control, rapidly and with a large current, releasing the energy of the detonating capacitor C2 to the ignition element F.

[0047] Figure 2The fourth circuit diagram from top to bottom is the digital logic control circuit, similar to a firmware-based MCU. It receives and parses externally input digital instruction signals and executes the corresponding actions (such as charging, safe discharge, memory read / write, BIT testing, and ignition). The memory uses non-power-off data retention memory such as OTP, FUSE (including eFuze), and EEPROM to store information such as the electronic detonator's electronic code and detonation password. The output driver is used to transmit the high-side control signals required for the digital logic control of the charging circuit, safe discharge circuit, ignition circuit, BIT detection circuit, and communication interface; that is, the high-side control logic required for voltage signal control of high-voltage signal.

[0048] Example 2

[0049] Please see Figure 4 , Figure 4 This is a schematic structural block diagram of an electronic device provided in an embodiment of this application. The electronic device includes a memory 101, a processor 102, and a communication interface 103. The memory 101, processor 102, and communication interface 103 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The memory 101 can be used to store software programs and modules, such as the program instructions / modules corresponding to the electronic detonator control module provided in Embodiment 1 of this application. The processor 102 executes various functional applications and data processing by executing the software programs and modules stored in the memory 101. The communication interface 103 can be used to communicate with other node devices for signaling or data.

[0050] The memory 101 may be, but is not limited to, random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc.

[0051] The processor 102 can be an integrated circuit chip with signal processing capabilities. The processor 102 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0052] Understandable. Figure 4 The structure shown is for illustrative purposes only; the electronic device may also include components that are more advanced than those shown. Figure 4 The more or fewer components shown, or having the same Figure 4 The different configurations shown. Figure 4 The components shown can be implemented using hardware, software, or a combination thereof.

[0053] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0054] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0055] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0056] In summary, the electronic detonator control module provided in this application embodiment features a serrated design for both the left and right pin pads, thus adding a discharge spike design to the PCB input terminal of the module to discharge strong interference through tip discharge. A differential mode discharge module is set between the left and right pins of the module to increase discharge measures and discharge excessively high input differential mode voltage. A positive half-bridge module is set at the chip input terminal, which limits the input voltage and also acts as a rectifier half-bridge. A Y-discharge capacitor is introduced between the pin input and the module's reference ground to discharge common-mode input interference voltage. During chip design, taking advantage of the characteristic that electronic detonators receive detonation commands simultaneously in network applications, the data transmission circuit in the communication module is used to short-circuit the two inputs of the chip after the electronic detonator receives the detonation command, discharging any differential mode voltage that may be introduced. Furthermore, the charging control circuit for the detonation capacitor is turned off, keeping the charging path of the detonation capacitor in a high-impedance state to prevent surge pulse interference from being conducted to the back end of the chip.

[0057] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electronic detonator control module, characterized in that, The circuit board includes a left-pin input terminal and a right-pin input terminal, wherein the left-pin input terminal and the right-pin input terminal are respectively connected to one end of the circuit board via left-pin solder pads and right-pin solder pads; characterized in that: (1) Both the left lead pad and the right lead pad are serrated; (2) A differential mode discharge module is provided between the left-side input terminal and the right-side input terminal; the differential mode discharge module includes a gas discharge tube, a varistor, and a differential mode suppression pair. (3) The input terminal of the main control chip on the circuit board is provided with a positive half-bridge module; the positive half-bridge module uses a Zener diode or a Schottky diode to generate the positive output of the bridge; one end of the positive half-bridge module is connected to the INA pin of the input terminal of the main control chip, the other end is connected to the INB pin of the input terminal of the main control chip, and the positive output of the positive half-bridge module is connected to the C1 pin of the main control chip; (4) A Y-discharge capacitor is introduced between the left input terminal and the reference ground, and between the right input terminal and the reference ground, respectively; (5) After the electronic detonator receives the detonation command, the main control chip... (A) By controlling the data transmission circuit in the communication module, the left and right pin input terminals of the main control chip are short-circuited. (B) Turn off the charging control circuit of the main control chip for the detonating capacitor, so that the charging path of the detonating capacitor is in a high-resistance state.

2. The electronic detonator control module as described in claim 1, characterized in that, One end of the differential mode bleeder module is connected to the INA pin through a first resistor R1, and the other end of the differential mode bleeder module is connected to the INB pin through a second resistor R2; one end of the positive half-bridge module is connected between the first resistor R1 and the INA pin, and the other end is connected between the second resistor R2 and the INB pin.

3. The electronic detonator control module as described in claim 1, characterized in that, It includes a first energy storage capacitor C1 and a second energy storage capacitor C2; one end of the first energy storage capacitor C1 is connected between the positive output of the positive half-bridge module and the C1 pin, and the other end of the first energy storage capacitor C1 is connected to the reference ground; the second energy storage capacitor C2 is connected between the VOUT pin of the main control chip and the reference ground.

4. The electronic detonator control module as described in claim 2, characterized in that, It includes a first discharge capacitor C4 and a second discharge capacitor C5; one end of the first discharge capacitor C4 is connected between the first resistor R1 and the INA pin, and the other end of the first discharge capacitor C4 is connected to the reference ground; the second discharge capacitor C5 is connected between the VOUT pin of the main control chip and the reference ground.

5. The electronic detonator control module as described in claim 3, characterized in that, It includes an ignition element F; one end of the ignition element F is connected to the C2 pin of the main control chip, and the other end of the ignition element F is connected to the FIN pin of the main control chip.

6. The electronic detonator control module as described in claim 5, characterized in that, It includes a BIT detection circuit; the BIT detection circuit is used to detect the state of the second energy storage capacitor C2 and the ignition element F, and to determine whether different parts of the circuit are in normal working condition based on different control states and the output results of the BIT detection circuit.

7. The electronic detonator control module as described in claim 1, characterized in that, It includes a digital logic control circuit; the digital logic control circuit is used to receive and parse externally input digital instruction signals and execute the corresponding actions of the instructions.

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