CN114353606A - On-missile ignition circuit and method for underwater missile - Google Patents
On-missile ignition circuit and method for underwater missile Download PDFInfo
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- CN114353606A CN114353606A CN202111443318.3A CN202111443318A CN114353606A CN 114353606 A CN114353606 A CN 114353606A CN 202111443318 A CN202111443318 A CN 202111443318A CN 114353606 A CN114353606 A CN 114353606A
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- mcu
- lithium battery
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 75
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 72
- 230000004913 activation Effects 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 239000007787 solid Substances 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 4
- 108010075750 P-Type Calcium Channels Proteins 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The invention provides an on-board ignition circuit and method for an underwater bomb, which can realize power supply starting of a lithium battery, ensure the ignition safety of an engine by adopting a three-section ignition protection strategy, and ensure the ignition safety of the engine by adopting the three-section ignition protection strategy. The bare drain end of the control line of the invention does not cause short circuit risk. After the power supply of the lithium battery is started, the voltage of 'activation plus' and 'activation-' is cancelled through the 'relay', and due to the property of the relay, under the condition that the two terminals of 'activation plus' and 'activation-' are not powered, the relay is not electrically connected with an internal circuit and is placed in a water environment, and the risk of short circuit cannot be caused; the phenomenon of engine misfiring can be prevented. Because the invention adopts the three-section type ignition protection strategy, namely, the MCU is electrified firstly, then the ignition switch circuit is started by the MCU, and then the ignition output protection circuit is started, the engine can be started for ignition, thereby ensuring the ignition safety.
Description
Technical Field
The invention relates to the technical field of on-missile ignition circuits, in particular to an on-missile ignition circuit and method for underwater bombs.
Background
There are many types of ignition of solid state engines, of which pop-up ignition is a common type of ignition. The underwater bullet is usually provided with a multi-stage solid engine, and when the underwater bullet runs to a certain moment according to a trajectory, a certain engine is ignited to control the running track of the underwater bullet. It is therefore desirable to use the on-board ignition module to ignite the engine during projectile operation. The lithium battery is mostly adopted for activating the engine, and the engine has the advantages of large instantaneous current, long power supply duration, small size and the like. Because of the underwater environment, the requirement on the sealing performance of the projectile body is high, and therefore, the technical problem is solved by safely starting the lithium battery of the on-projectile ignition circuit to supply power and igniting the solid engine. The method for starting the power supply output of the lithium battery in the prior common mode has the following defects that the cartridge is started to ignite under the underwater environment:
if the mode of installing the switch on the projectile body is adopted, the power supply output mode of the lithium battery is started. The problem of the tightness of the switch needs to be considered, and workers need to be electrified in a close distance, so that the requirement on the operation of the workers is high, the complexity of the process is high, and the safety is low; and the ignition module is remotely started and ignited by adopting a wireless communication mode. The wireless signals need to realize cross-medium communication from air to underwater, the communication reliability is poor, and the realization is complex; and controlling the power supply of the lithium battery to be started in a wired mode. After the engine is ignited, the inlet end needs to be treated to prevent the risk of short circuit caused by contact with water.
Disclosure of Invention
In view of the above, the invention provides an on-board ignition circuit and method for an underwater bomb, which can realize power supply starting of a lithium battery, and ensure the ignition safety of an engine by adopting a three-section type ignition protection strategy.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the invention relates to an on-missile ignition circuit of an underwater missile, which comprises a lithium battery, an 'activation plus' lithium battery power supply starting control line, an 'activation-' lithium battery power supply starting control line, a relay, an MCU (microprogrammed control unit) power supply switching circuit, an ignition power supply switching circuit, a power supply conversion module, an MCU (microprogrammed control unit), an ignition circuit and an ignition output protection circuit;
the lithium battery is connected with the input ends of the relay, the MCU power supply switch circuit and the ignition power supply switch circuit; the 'activation plus' lithium battery power supply starting control line and the 'activation minus' lithium battery power supply starting control line are lithium battery power supply starting control lines and control the on-off of the output end of the relay; the power supply conversion module is connected with the relay and the output end of the MCU power supply switch circuit and converts the voltage of the lithium battery into the power supply voltage required by the MCU; the MCU power supply switch circuit plays a role of a power-on switch between the lithium battery and the power supply conversion module; the MCU is a control unit and is used for controlling the on-off of the output ends of the MCU power supply switch circuit, the ignition circuit and the ignition output protection circuit; the ignition power supply switch circuit is connected with the lithium battery and the ignition circuit and plays a role of a power-on switch between the lithium battery and the ignition circuit; the ignition circuit plays a role in igniting the solid engine; the ignition output protection circuit controls the output of the ignition circuit and plays a role in preventing the solid engine from being ignited by mistake.
The MCU uses weak current signals to control the on-off of the output ends of the MCU power supply switch circuit, the ignition circuit and the ignition output protection circuit.
The power supply starting control line of the 'activation plus' lithium battery and the power supply starting control line of the 'activation minus' lithium battery are both extended to set positions.
The ignition power supply circuit, the ignition circuit and the MCU power supply switch circuit are identical in structure, and both the ignition power supply circuit and the MCU power supply switch circuit use an optical coupling chip and a P-type channel MOSFET as a core building circuit.
The ignition output protection circuit is a circuit built by taking an optical coupling chip and a relay as a core; when the differential control signal from the MCU is no signal, the normally closed ends of the relays are DH1_ OUT + and DH1_ OUT-short-circuited, wherein DH1_ OUT + and DH1_ OUT-are respectively the positive and negative inputs of the squib in the ignition circuit.
The invention also provides an on-missile ignition method of the underwater missile, the circuit disclosed by the invention is adopted for ignition, and the ignition process is as follows:
applying voltage for conducting the output end of the relay on the 'activation plus' lithium battery power supply starting control line and the 'activation-' lithium battery power supply starting control line, closing the relay, and starting the lithium battery to supply power to the power supply conversion module at the moment; the MCU starts working after obtaining the power supply input of the power supply conversion module, and starts timing after power-on self-test;
when the MCU times to t1, the MCU outputs a starting signal of the MCU power supply switch circuit, and the lithium battery supplies power to the power supply conversion module through the MCU power supply switch circuit; at the moment, the voltages of the 'activation plus' lithium battery power supply starting control line and the 'activation minus' lithium battery power supply starting control line are cancelled;
when the MCU times t2, the MCU starts an ignition power supply switch circuit and starts the lithium battery power supply output of the ignition circuit;
when the MCU counts the time t3, the MCU starts the ignition output protection circuit to remove the output protection of the ignition circuit;
and when the MCU counts the time t4, the MCU starts an ignition circuit to ignite the engine, and the task is completed.
Has the advantages that:
the present invention uses a lithium battery as a power source for engine activation. The power supply of the lithium battery is started by adopting a mode that the relay triggers the MCU for self-locking power supply, and the safety of engine ignition is guaranteed by adopting a three-section type ignition protection strategy. The bare drain end of the control line of the invention does not cause short circuit risk. After the power supply of the lithium battery is started, the voltage of 'activation plus' and 'activation-' is cancelled through the 'relay', and due to the property of the relay, under the condition that the two terminals of 'activation plus' and 'activation-' are not powered, the relay is not electrically connected with an internal circuit and is placed in a water environment, and the risk of short circuit cannot be caused; the phenomenon of engine misfiring can be prevented. Because the invention adopts the three-section type ignition protection strategy, namely, the MCU is electrified firstly, then the ignition switch circuit is started by the MCU, and then the ignition output protection circuit is started, the engine can be started for ignition, thereby ensuring the ignition safety.
The invention can prevent electromagnetic interference or static electricity from causing false triggering of the lithium battery. Because the delay timing time t1 of the self-power supply loop formed by the MCU is set, the power supply voltage difference of 'activation +' and 'activation-' does not reach the time t1, the MCU self-power supply loop is not formed, and the false triggering of 'activation +' and 'activation-' signals caused by electromagnetic interference or static electricity and the like is prevented.
The invention is simple in manual operation, except that the MCU power supply circuit is activated and the operation is required by workers, the rest steps are completed by the MCU operation, the possibility of misoperation of tasks is reduced, and the ignition safety is improved.
The control line of the invention can be extended to a distance, thus ensuring the safety of workers. The two extensions "activate +" and "activate-" can theoretically be extended to a place that is sufficiently safe.
Drawings
Fig. 1 is a schematic diagram of the ignition circuit of the present invention.
Fig. 2 is a schematic diagram of a relay and a supporting circuit thereof.
FIG. 3 is a schematic diagram of the MCU power supply switch circuit of the present invention.
Fig. 4 is a schematic diagram of the ignition power supply circuit of the present invention.
Fig. 5 is a schematic diagram of the ignition circuit of the present invention.
FIG. 6 is a schematic diagram of the ignition output protection circuit of the present invention.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides an on-board ignition circuit of an underwater bomb, which is shown in a schematic diagram of fig. 1, wherein a thick line is a power supply line, a thin line is a control line, and the ignition circuit comprises a lithium battery, an 'activation plus' lithium battery power supply starting control line, an 'activation-' lithium battery power supply starting control line, a relay, an MCU power supply switch circuit, an ignition power supply switch circuit, a power supply conversion module, an MCU, an ignition circuit and an ignition output protection circuit.
The lithium battery is connected with the input ends of the relay, the MCU power supply switch circuit and the ignition power supply switch circuit; the 'activation plus' lithium battery power supply starting control line and the 'activation minus' lithium battery power supply starting control line are lithium battery power supply starting control lines which are extended to a set position (far distance) and control the on-off of the output end of the relay; the power supply conversion module is connected with the relay and the output end of the MCU power supply switch circuit and converts the voltage of the lithium battery into the power supply voltage required by the MCU; the MCU power supply switch circuit plays a role of a power-on switch between the lithium battery and the power supply conversion module; the MCU is a control unit, and weak current signals are used for controlling the on-off of the output ends of the MCU power supply switch circuit, the ignition circuit and the ignition output protection circuit; the ignition power supply switch circuit is connected with the lithium battery and the ignition circuit and plays a role of a power-on switch between the lithium battery and the ignition circuit; the ignition circuit plays a role in igniting the solid engine; the ignition output protection circuit controls the output of the ignition circuit and plays a role in preventing the solid engine from being ignited by mistake.
The invention also provides an on-missile ignition method of the underwater missile, and based on the ignition circuit, in an underwater missile application scene, the ignition process is as follows:
at a distance, a worker applies voltage for conducting the output end of the relay on the 'activation plus' lithium battery power supply starting control line and the 'activation minus' lithium battery power supply starting control line, the relay is closed, and the lithium battery is started to supply power to the power supply conversion module at the moment. The MCU starts working after obtaining the power supply input of the power supply conversion module, and starts timing after power-on self-test;
when the MCU times to t1, the MCU outputs a starting signal of the MCU power supply switch circuit, and the lithium battery supplies power to the power supply conversion module through the MCU power supply switch circuit; the remote staff can cancel the voltage of the 'activation plus' lithium battery power supply starting control line and the 'activation minus' lithium battery power supply starting control line at the moment. At the moment, the MCU, the MUC power supply switch circuit and the power supply conversion module form an MCU self-powered loop;
when the MCU times t2, the MCU starts an ignition power supply switch circuit, and the lithium battery power supply output of the ignition circuit is turned on;
when the MCU times to t3, the MCU starts the ignition output protection circuit, and the output protection of the ignition circuit is removed;
and when the MCU counts the time t4, the MCU starts an ignition circuit to ignite the engine, and the task is completed.
The circuit of the invention is illustrated by way of an application example, and indexes of the solid engine ignition tube are as follows:
bridge circuit resistance: 0.9-1.3 omega; insulation resistance: not less than 20M Ω; safe current: 1A1W/5min does not ignite; the single ignition tube should fire within 50ms at 5-9A current.
MCU chooses for use STM32F411CEU6 chip of ST company, mainly realizes the function and does: (1) high and low level output of a pin is realized, and (2) a timing function is realized.
The relay adopts JGC-5043MA/010Y-50-02 of the 792 works at home, the input control signal range is 10-32V, the output typical voltage is 50V, the maximum current can pass through the relay is 5A, and the use and matching circuit is shown in figure 2. When the voltage difference between the 24V _ KZ + and the 24V _ KZ-reaches 24V, the positive electrode DC of the lithium battery is conducted with the DC _ OUT, namely the DC _ OUT is 24V.
The power supply conversion module can realize that 24V voltage of the lithium battery is converted into 3.3V MCU power supply voltage. An EJE24S3V3M integrated power supply module of a sunward power supply is mainly selected, and the input voltage range is as follows: 18V to 36V, output of 3.3V and rated current of 2.42A.
As shown in fig. 3, the power supply switch circuit uses an optocoupler chip TLP3407S from toshiba corporation and a P-type channel MOSFET tube IRFH9310PbF from english-flying corporation as core building circuits. Wherein, the maximum output current of the IRFH9310PbF integrated circuit is 21A. The purpose of controlling the output of DC _ OUT by differential control signals ARM _ IO _5VJH + and ARM _ IO _5 VJH-from the MCU can be realized. When ARM _ IO _5VJH + is high and ARM _ IO _5 VJH-is low, the optocoupler is conducted, the MOSFET is also conducted at the moment, the output DC _ OUT is conducted with DC, and the output is 24V.
In addition, the ignition power supply circuit is shown in fig. 4, the ignition circuit is shown in fig. 5, and the ignition power supply circuit is the same in construction as the ignition circuit and the MCU power supply switch circuit. Both the optocoupler chip TLP3407S from Toshiba and the P-channel MOSFET IRFH9310PbF from England flying company are used as core building circuits. The level difference control signal of the MCU controls the on and off of the MOSFET, and further respectively controls (1) the power supply of the ignition circuit to be connected to the anode of the lithium battery and (2) the ignition is started.
The ignition output protection circuit is shown in fig. 6. An optocoupler chip TLP3407S of Toshiba company and a JZC-078M/024-01 relay of the national 792 factory are used as core building circuits. The input control signal range of the JZC-078M/024-01 relay is 10-32V, the typical value is 24V, and the output typical voltage is 50V. ARM _ IO _ DH _ JDQ + and ARM _ IO _ DH _ JDQ-are differential control signals from the MCU, and DH1_ OUT + and DH1_ OUT-are respectively positive and negative inputs of the squib in the ignition circuit. When ARM _ IO _ DH _ JDQ + and ARM _ IO _ DH _ JDQ-have no signals, the normally closed end of the relay is in a DH1_ OUT + short circuit with DH1_ OUT-, namely the anode and the cathode of the ignition tube are conducted, and the functions of preventing artificial false activation and preventing static false activation are achieved. When ARM _ IO _ DH _ JDQ + is in a high level and ARM _ IO _ DH _ JDQ-is in a low level, the optocoupler is connected, at the moment, DH1_ OUT + and DH1_ OUT are disconnected, and DH1_ OUT is connected with 24VGND (lithium battery cathode). And setting the DH1_ OUT + as the anode of the lithium battery by the waiting ignition circuit, and igniting the engine.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An on-board ignition circuit of an underwater bomb is characterized by comprising a lithium battery, an activation + lithium battery power supply starting control line, an activation-lithium battery power supply starting control line, a relay, an MCU power supply switch circuit, an ignition power supply switch circuit, a power supply conversion module, an MCU, an ignition circuit and an ignition output protection circuit;
the lithium battery is connected with the input ends of the relay, the MCU power supply switch circuit and the ignition power supply switch circuit; the activation and lithium battery power supply starting control line and the activation and lithium battery power supply starting control line are used for providing a lithium battery power supply starting control line and controlling the on-off of the output end of the relay; the power supply conversion module is connected with the relay and the output end of the MCU power supply switch circuit and converts the voltage of the lithium battery into the power supply voltage required by the MCU; the MCU power supply switch circuit plays a role of a power-on switch between the lithium battery and the power supply conversion module; the MCU is a control unit and is used for controlling the on-off of the output ends of the MCU power supply switch circuit, the ignition circuit and the ignition output protection circuit; the ignition power supply switch circuit is connected with the lithium battery and the ignition circuit and plays a role of a power-on switch between the lithium battery and the ignition circuit; the ignition circuit plays a role in igniting the solid engine; the ignition output protection circuit controls the output of the ignition circuit and plays a role in preventing the solid engine from being ignited by mistake.
2. The circuit of claim 1 wherein the MCU uses weak current signals to control the switching of the MCU power switch circuit, ignition power supply switch circuit, ignition circuit and ignition output protection circuit outputs.
3. The circuit of claim 1, wherein the active + lithium battery power on control line and the active-lithium battery power on control line are extended to a set position.
4. The circuit of claim 1, wherein the ignition power supply circuit is the same in structure as the ignition circuit and the MCU power supply switch circuit, and both use an optical coupler chip and a P-type channel MOSFET as a core building circuit.
5. The circuit of claim 1, wherein the ignition output protection circuit builds a circuit with an optical coupling chip and a relay as a core; when the differential control signal from the MCU is no signal, the normally closed ends of the relays are DH1_ OUT + and DH1_ OUT-short-circuited, wherein DH1_ OUT + and DH1_ OUT-are respectively the positive and negative inputs of the squib in the ignition circuit.
6. A method for firing underwater projectiles on board a projectile, wherein the firing is carried out using the circuit of any one of claims 1 to 5, the firing sequence being as follows:
applying voltage for conducting the output end of the relay on the activation + lithium battery power supply starting control line and the activation-lithium battery power supply starting control line, closing the relay, and starting the lithium battery to supply power to the power supply conversion module; the MCU starts working after obtaining the power supply input of the power supply conversion module, and starts timing after power-on self-test;
when the MCU times to t1, the MCU outputs a starting signal of the MCU power supply switch circuit, and the lithium battery supplies power to the power supply conversion module through the MCU power supply switch circuit; at the moment, the voltage of the activation and lithium battery power supply starting control line and the voltage of the activation and lithium battery power supply starting control line are cancelled;
when the MCU times t2, the MCU starts an ignition power supply switch circuit and starts the lithium battery power supply output of the ignition circuit;
when the MCU counts the time t3, the MCU starts the ignition output protection circuit to remove the output protection of the ignition circuit;
and when the MCU counts the time t4, the MCU starts an ignition circuit to ignite the engine, and the task is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443318.3A CN114353606A (en) | 2021-11-30 | 2021-11-30 | On-missile ignition circuit and method for underwater missile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443318.3A CN114353606A (en) | 2021-11-30 | 2021-11-30 | On-missile ignition circuit and method for underwater missile |
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| Publication Number | Publication Date |
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| CN114353606A true CN114353606A (en) | 2022-04-15 |
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| CN202111443318.3A Pending CN114353606A (en) | 2021-11-30 | 2021-11-30 | On-missile ignition circuit and method for underwater missile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115616968A (en) * | 2022-12-16 | 2023-01-17 | 湖南高至科技有限公司 | Multi-channel activation control device |
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| CN111878278A (en) * | 2020-08-06 | 2020-11-03 | 深圳市天成实业科技有限公司 | Novel ignition clamp and ignition judgment method |
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2021
- 2021-11-30 CN CN202111443318.3A patent/CN114353606A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040027079A1 (en) * | 2002-07-09 | 2004-02-12 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | System for controlling starting and stopping of engine |
| CN203522157U (en) * | 2013-07-08 | 2014-04-02 | 深圳市思倍生电子科技有限公司 | Heavy current protective device for automobile emergency starting power supply |
| CN206691047U (en) * | 2017-04-13 | 2017-12-01 | 江苏新日电动车股份有限公司 | A kind of automobile-used start-up circuit |
| CN210191218U (en) * | 2019-03-27 | 2020-03-27 | 奇瑞商用车（安徽）有限公司 | Electronic monitoring system of electric automobile storage battery |
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| CN115616968A (en) * | 2022-12-16 | 2023-01-17 | 湖南高至科技有限公司 | Multi-channel activation control device |
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