Explosive initiating control device with output state acquisition function

Abstract

This utility model relates to the field of pyrotechnic initiation control technology, and provides a pyrotechnic initiation control device with output status acquisition function, including: a power supply circuit, an initiation control circuit, a triggering and driving circuit, an ignition output circuit, and an output status isolation acquisition circuit. The power supply circuit converts the +28V ignition output power supply into +5V and +3.3V to power the peripheral circuits of the microcontroller in the initiation control circuit. The ignition command from the host computer is processed by the initiation control circuit and outputs the ignition control signal through two I / O ports of the microcontroller. After passing through the triggering and driving circuit, the ignition control signal is sent to the ignition output circuit. At the same time, the load delivery and physical separation signals enable the ignition output, and the ignition output is sent to the pyrotechnic, initiating the pyrotechnic initiation. During the initiation process, the output status isolation acquisition circuit acquires the status of the output voltage and reports it periodically. This utility model can effectively improve the reliability of the ignition output during the initiation of pyrotechnics.

Description

Technical Field

[0001] This utility model relates to the field of pyrotechnic initiation control technology, and in particular to a pyrotechnic initiation control device with output status acquisition function. Background Technology

[0002] The reliability of pyrotechnic initiation timing control is crucial for achieving precise aerial separation actions such as load separation. Traditional solutions typically employ cascaded control of physical separation switches and ignition control signals (single I / O port), which suffers from insufficient reliability, particularly prone to erroneous outputs during microcontroller initialization or under external interference. After successful ignition, the load frame separation signal is only output via limit switches, making it impossible to accurately monitor the initiation status and timing of each explosion control point in real time. This hinders telemetry data analysis and load attitude adjustment. Utility Model Content

[0003] The purpose of this utility model is to solve at least one technical problem in the background art and to provide a pyrotechnic detonation control device with output status acquisition function.

[0004] To achieve the above objectives, this utility model provides a pyrotechnic detonation control device with output status acquisition function, comprising: a power supply circuit, a detonation control circuit, a triggering and driving circuit, an ignition output circuit, and an output status isolation acquisition circuit. The power supply circuit converts the +28V ignition output power into +5V and +3.3V to power the peripheral circuits of the microcontroller in the detonation control circuit. The ignition command from the host computer is processed by the detonation control circuit and outputs the ignition control signal through the two I / O ports of the microcontroller. After passing through the trigger and drive circuit, the ignition control signal is sent to the ignition output circuit. At the same time, the load release permission signal and the physical separation signal enable the ignition output. The ignition output is sent to the pyrotechnic device, and the pyrotechnic device is detonated. During the detonation process, the output status isolation acquisition circuit collects the status of the output voltage and reports it periodically.

[0005] According to one aspect of the present invention, it also includes: a remote software programming and upgrade circuit; The remote software programming and upgrade circuit sets the BOOT0 pin of the microcontroller to a high level and the BOOT1 pin to a low level according to the ISP programming control signal, and then performs remote programming and upgrade of the microcontroller through the communication module.

[0006] According to one aspect of the present invention, the remote software programming and upgrade circuit includes: an RS232 communication module, a programming enable circuit, and a digital isolator; When the programming enable circuit receives the ISP programming control signal, it sets the BOOT0 pin of the microcontroller to a high level and the BOOT1 pin to a low level through two optocouplers, and then performs remote programming upgrade through the RS232 communication module. After the program is remotely programmed and upgraded, the RS232 communication module is isolated from the microcontroller through the digital isolator.

[0007] According to one aspect of the present invention, the power supply circuit includes an isolated power supply section and a non-isolated power supply section; The isolated power supply section includes a DC-DC isolated power supply module, a filter circuit, and a first three-terminal voltage regulator. The isolated power supply section converts the ignition output power of +28V to +5V, and then reduces the +5V voltage to +3.3V through the first three-terminal voltage regulator. The non-isolated power supply section includes a second three-terminal voltage regulator, which directly reduces the ignition output power supply from +28V to +5V.

[0008] According to one aspect of the present invention, the detonation control circuit includes the microcontroller, crystal oscillator, and CAN communication module; The ignition command from the host computer is transmitted to the microcontroller through the CAN communication module. The microcontroller outputs high and low levels through two ports to control the trigger and drive circuit to output the ignition signal.

[0009] According to one aspect of the present invention, the triggering and driving circuit includes: a transistor and a D flip-flop; The microcontroller sends high and low levels in sequence to turn on the transistor and outputs a high level to the D flip-flop. When it receives the CLK clock signal, it outputs a high-level ignition signal.

[0010] According to one aspect of the present invention, the ignition output circuit includes: a circuit for controlling the turn-on of a P-type field-effect transistor by an NPN transistor pull-down and a circuit for controlling the turn-on of a P-type field-effect transistor by an optocoupler-isolated pull-down; the two circuits are connected in series.

[0011] According to one aspect of the present invention, the output state isolation acquisition circuit includes: an isolation operational amplifier and an operational amplifier; When the ignition power supply is output to the pyrotechnic resistor, the voltage drop across the resistor is divided, sampled by the sampling resistor, and sent to the input of the isolation operational amplifier. The output is a first-stage differential amplifier signal, which is then output to the operational amplifier. After a second stage of amplification, it is output to the single-ended output of the microcontroller's AD port.

[0012] According to the present invention, the ignition control signal of the pyrotechnic detonation control device with output status acquisition function is a dual IO port output control, and the ignition output is enabled by the load delivery signal and the physical separation signal; each group of ignition output circuits is a dual parallel output of MOS transistor circuits.

[0013] This invention supports remote online program upgrades.

[0014] This invention significantly enhances ignition reliability by adding a load delivery signal and changing the ignition control signal to dual I / O ports (out-of-phase output). Simultaneously, the newly added isolation sampling function can report the status of each detonation point to the host computer in real time as telemetry data. Attached Figure Description

[0015] Figure 1 This schematic diagram illustrates the structural block diagram of a pyrotechnic detonation control device with output status acquisition function according to one embodiment of the present invention. Figure 2 This is a circuit diagram of the isolated power supply section in the power supply circuit of Example 1; Figure 3 This is a circuit diagram of the non-isolated power supply section in the power supply circuit of Example 1; Figure 4 The microcontroller and its circuit diagram in the detonation control circuit of Example 1; Figure 5 The CAN communication module and its circuit diagram in the detonation control circuit of Example 1; Figure 6 The transistors, D flip-flops, and their circuit diagrams are shown in the triggering and driving circuit of Example 1. Figure 7 This is the ignition output circuit diagram for Example 1; Figure 8 This is the output status isolation acquisition circuit of Example 1; Figure 9 and Figure 10 These are two optocouplers and their circuit diagrams in the remote software programming and upgrade circuit of Example 1. Figure 11 The RS232 bus communication module, digital isolator, and their circuit diagram are shown in the remote software programming and upgrade circuit of Example 1. Detailed Implementation

[0016] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the described embodiments are merely intended to enable those skilled in the art to better understand and thus implement the present invention, and are not intended to imply any limitation on the scope of the present invention.

[0017] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment".

[0018] Figure 1 This schematic diagram illustrates the structural block of a pyrotechnic detonation control device with output status acquisition function according to one embodiment of the present invention. Figure 1 As shown, in this embodiment, the pyrotechnic detonation control device with output status acquisition function includes: a power supply circuit 1, a detonation control circuit 2, a triggering and driving circuit 3, an ignition output circuit 4, and an output status isolation acquisition circuit 5. Power supply circuit 1 converts the +28V ignition output power supply into +5V and +3.3V to power the peripheral circuits of the microcontroller in the detonation control circuit 2. The ignition command from the host computer is processed by the detonation control circuit 2 and outputs the ignition control signal through the two I / O ports of the microcontroller. After passing through the trigger and drive circuit 3, the ignition control signal is sent to the ignition output circuit 4. At the same time, the load release permission signal and the physical separation signal enable the ignition output. The ignition output is sent to the pyrotechnic device 11, and the pyrotechnic device is detonated. During the detonation process, the output status isolation acquisition circuit 5 collects the status of the output voltage and reports it periodically.

[0019] Furthermore, such as Figure 1 As shown, the pyrotechnic detonation control device with output status acquisition function of this utility model also includes: a remote software programming and upgrade circuit 6. The remote software programming and upgrade circuit sets the BOOT0 pin of the microcontroller to a high level and the BOOT1 pin to a low level according to the ISP programming control signal, and then performs remote programming and upgrade of the microcontroller through the communication module.

[0020] Furthermore, such as Figure 1 As shown, in this embodiment, the remote software programming and upgrade circuit 6 includes: an RS232 communication module 7, a programming enable circuit 8, and a digital isolator; When the programming enable circuit 8 receives the ISP programming control signal, it sets the BOOT0 pin of the microcontroller to a high level and the BOOT1 pin to a low level through two optocouplers, and then performs remote programming upgrade through the RS232 communication module 7. After the program is remotely programmed and upgraded, the RS232 communication module 7 is isolated from the microcontroller through the digital isolator.

[0021] Furthermore, according to one embodiment of the present invention, the power supply circuit 1 includes an isolated power supply section and a non-isolated power supply section; The isolated power supply section includes a DC-DC isolated power supply module, a filter circuit, and a first three-terminal regulator. The isolated power supply section converts the ignition output power of +28V to +5V, and then the first three-terminal regulator reduces the +5V voltage to +3.3V. The non-isolated power supply section includes a second three-terminal regulator, which directly reduces the ignition output power supply from +28V to +5V.

[0022] Furthermore, such as Figure 1 As shown, according to one embodiment of the present invention, the detonation control circuit 2 includes a microcontroller 9, a crystal oscillator, and a CAN communication module 10. The ignition command from the host computer is transmitted to the microcontroller 9 via the CAN communication module 10. The microcontroller 9 outputs high and low levels through two ports to control the trigger and drive circuit 3 to output the ignition signal.

[0023] Furthermore, according to one embodiment of the present invention, the triggering and driving circuit 3 includes: a transistor and a D flip-flop; The microcontroller sends high and low levels in sequence to turn on the transistor and outputs a high level to the D flip-flop. When it receives the CLK clock signal, it outputs a high-level ignition signal.

[0024] Furthermore, according to one embodiment of the present invention, the ignition output circuit 4 includes: an NPN transistor pull-down control circuit for turning on the P-type field-effect transistor and an optocoupler-isolated pull-down control circuit for turning on the P-type field-effect transistor; the two circuits are connected in series.

[0025] Furthermore, according to one embodiment of the present invention, the output state isolation acquisition circuit 5 includes: an isolation operational amplifier and an operational amplifier; When the ignition power supply is output to the pyrotechnic resistor, the voltage drop across the resistor is divided, sampled by the sampling resistor, and sent to the input of the isolation operational amplifier. The output is a first-stage differential amplifier signal, which is then output to the operational amplifier. After a second stage of amplification, it is output to the single-ended output of the microcontroller's AD port.

[0026] According to the above-mentioned solution of this utility model, the ignition control signal of the pyrotechnic detonation control device with output status acquisition function of this utility model is a dual IO port output control, and the ignition output is enabled by the load delivery signal and the physical separation signal; each group of ignition output circuits is a dual parallel output of MOS transistor circuits.

[0027] This invention supports remote online program upgrades.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only one preferred embodiment of this utility model and are only used to explain this utility model. They do not limit the scope of protection of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] Example 1 Combination Figure 1 As shown, this embodiment provides a pyrotechnic detonation control device with output status acquisition function, including: power supply circuit 1, detonation control circuit 2, triggering and driving circuit 3, ignition output circuit 4, output status isolation acquisition circuit 5, and remote software burning and upgrading circuit 6. Power supply circuit 1 converts the +28V ignition output power into +5V and +3.3V to power the peripheral circuits of the microcontroller in the detonation control circuit 2. The ignition command from the host computer is processed by the detonation control circuit 2 and outputs ignition control signals through the microcontroller's two I / O ports. After passing through the trigger and drive circuit 3, the ignition control signals are sent to the ignition output circuit 4. Simultaneously, the load deployment enable signal and the physical separation signal enable the ignition output, and the ignition output is sent to the pyrotechnic device 11, which detonates. During detonation, the output status isolation acquisition circuit 5 collects the output voltage status and reports it periodically. Remote software programming and upgrade circuit 6 supports remote programming and upgrade programs.

[0030] Furthermore, such as Figure 2 and Figure 3 As shown, the power supply circuit of this embodiment includes an isolated power supply section and a non-isolated power supply section. The isolated power supply section includes a DC-DC isolated power supply module K3 and related filtering circuits, which converts the +28V ignition output power supply to +5V, and then reduces the +5V voltage to +3.3V through the first three-terminal regulator K5. The non-isolated power supply section includes a second three-terminal regulator U1 and related circuits, which directly reduces the +28V ignition output power supply to +5V.

[0031] Furthermore, such as Figure 4 and Figure 5 As shown, in this embodiment, the host computer sends an ignition command through the CAN communication module T1 in the detonation control circuit to the microcontroller K1 in the detonation control circuit. The microcontroller K1 sends two levels, one high and one low, in sequence for ignition control and receives the AD acquisition signal after ignition output, and reports it to the host computer at a certain period.

[0032] Furthermore, such as Figure 6As shown, in this embodiment, the microcontroller K1 sends out two levels, one high and one low, in sequence, which turns on the transistor Q9 in the trigger and drive circuit and outputs a high level to the D flip-flop K2. When it receives the CLK clock signal, it outputs a high-level ignition signal with enhanced driving capability.

[0033] Furthermore, such as Figure 7 As shown, in this embodiment, the load delivery enable signal controls the transistor Q3 in the ignition output circuit to turn on, pulling down the gate of the P-type field-effect transistor Q1, making Q1 conduct. The ignition power is then applied to the source of the next-stage field-effect transistor Q5. When the ignition signal controls the optocoupler Q7 to turn on, the output of the optocoupler Q7 pulls down the gate of the field-effect transistor Q5 to the physical separation terminal. When the system receives a low-level physical separation signal, the field-effect transistor Q5 turns on, meaning the ignition power is output to the pyrotechnic resistor R162 through the current-limiting resistor R81.

[0034] Furthermore, such as Figure 8 As shown, in this embodiment, the isolated power supply circuit (isolated power supply section) supplies power to the output side of the isolated operational amplifier K13, and the non-isolated power supply circuit (non-isolated power supply section) supplies power to the acquisition side of the isolated operational amplifier K13. When the ignition power supply is output to the pyrotechnic resistor R162, the voltage drop across R162 is divided and collected by the sampling resistor R104 and sent to the input terminal of the isolated differential operational amplifier K13. After amplification, the differential signal is output from K13 to the differential operational amplifier K10, and then amplified by K10 for a second stage before being output to the AD port of the microcontroller K1. The microcontroller then reports the signal to the host computer periodically.

[0035] Furthermore, such as Figure 9 , Figure 10 and Figure 11 As shown, in this embodiment, when the programming enable circuit receives the ISP programming control signal, it sets the BOOT0 pin of the microcontroller K1 to a high level and the BOOT1 pin to a low level through optocouplers Q26 and Q27, respectively. At this time, the program can be remotely programmed and upgraded through the RS232 bus communication module K8, and an isolator K9 is used to isolate the non-isolated RS232 bus communication module K8 from the microcontroller circuit.

[0036] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

[0037] It should be understood that the sequence number of each step in the utility model content and implementation method does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the utility model implementation method.

Claims

1. A pyrotechnic detonation control device with output status acquisition function, characterized in that, include: Power supply circuit, detonation control circuit, triggering and driving circuit, ignition output circuit, output status isolation and acquisition circuit; The power supply circuit converts the +28V ignition output power into +5V and +3.3V to power the peripheral circuits of the microcontroller in the detonation control circuit. The ignition command from the host computer is processed by the detonation control circuit and outputs the ignition control signal through the two I / O ports of the microcontroller. After passing through the trigger and drive circuit, the ignition control signal is sent to the ignition output circuit. At the same time, the load release permission signal and the physical separation signal enable the ignition output. The ignition output is sent to the pyrotechnic device, and the pyrotechnic device is detonated. During the detonation process, the output status isolation acquisition circuit collects the status of the output voltage and reports it periodically.

2. The pyrotechnic detonation control device with output status acquisition function according to claim 1, characterized in that, Also includes: Remote software programming and upgrade circuit; The remote software programming and upgrade circuit sets the BOOT0 pin of the microcontroller to a high level and the BOOT1 pin to a low level according to the ISP programming control signal, and then performs remote programming and upgrade of the microcontroller through the communication module.

3. The pyrotechnic detonation control device with output status acquisition function according to claim 2, characterized in that, The remote software programming and upgrade circuit includes: an RS232 communication module, a programming enable circuit, and a digital isolator; When the programming enable circuit receives the ISP programming control signal, it sets the BOOT0 pin of the microcontroller to a high level and the BOOT1 pin to a low level through two optocouplers, and then performs remote programming upgrade through the RS232 communication module. After the program is remotely programmed and upgraded, the RS232 communication module is isolated from the microcontroller through the digital isolator.

4. The pyrotechnic detonation control device with output status acquisition function according to claim 1, characterized in that, The power supply circuit includes an isolated power supply section and a non-isolated power supply section; The isolated power supply section includes a DC-DC isolated power supply module, a filter circuit, and a first three-terminal voltage regulator. The isolated power supply section converts the ignition output power of +28V to +5V, and then reduces the +5V voltage to +3.3V through the first three-terminal voltage regulator. The non-isolated power supply section includes a second three-terminal voltage regulator, which directly reduces the ignition output power supply from +28V to +5V.

5. The pyrotechnic detonation control device with output status acquisition function according to claim 1, characterized in that, The detonation control circuit includes the microcontroller, crystal oscillator, and CAN communication module; The ignition command from the host computer is transmitted to the microcontroller through the CAN communication module. The microcontroller outputs high and low levels through two ports to control the trigger and drive circuit to output the ignition signal.

6. The pyrotechnic detonation control device with output status acquisition function according to claim 1, characterized in that, The triggering and driving circuit includes: a transistor and a D flip-flop; The microcontroller sends high and low levels in sequence to turn on the transistor and outputs a high level to the D flip-flop. When it receives the CLK clock signal, it outputs a high-level ignition signal.

7. The pyrotechnic detonation control device with output status acquisition function according to claim 1, characterized in that, The ignition output circuit includes: a circuit that uses an NPN transistor to pull down and control the P-type field-effect transistor to turn on, and an optocoupler-isolated circuit that uses an NPN transistor to pull down and control the P-type field-effect transistor to turn on; the two circuits are connected in series.

8. The pyrotechnic detonation control device with output status acquisition function according to any one of claims 1-7, characterized in that, The output status isolation acquisition circuit includes: an isolation operational amplifier and an operational amplifier; When the ignition power supply is output to the pyrotechnic resistor, the voltage drop across the resistor is divided, sampled by the sampling resistor, and sent to the input of the isolation operational amplifier. The output is a first-stage differential amplifier signal, which is then output to the operational amplifier. After a second stage of amplification, it is output to the single-ended output of the microcontroller's AD port.

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