CN209991883U - Detonation circuit and detonation device - Google Patents
Detonation circuit and detonation device Download PDFInfo
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- CN209991883U CN209991883U CN201920205447.0U CN201920205447U CN209991883U CN 209991883 U CN209991883 U CN 209991883U CN 201920205447 U CN201920205447 U CN 201920205447U CN 209991883 U CN209991883 U CN 209991883U
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Abstract
The utility model discloses a detonation circuit and ignition, wherein, should detonate the circuit, include: and one end of the control branch is connected with the to-be-detonated object and comprises at least two controllable switches connected in parallel, the control ends of the at least two controllable switches are connected with each other, and the control ends are also connected with a detonation signal for controlling the to-be-detonated object to detonate. According to the detonation circuit, the control branch circuit for controlling the detonation of the to-be-detonated object is composed of at least two controllable switches connected in parallel, and when any one controllable switch works normally, the to-be-detonated object can be controlled to detonate, so that the reliability of the detonation circuit is improved.
Description
Technical Field
The utility model relates to the technical field of circuits, concretely relates to detonation circuit and ignition.
Background
The initiating explosive device detonation circuit is an important electronic instrument component of an electrical system of a commercial carrier rocket, is a direct driver of various actions of the carrier rocket in the whole flight process, and has the function of executing an instruction sent by a flight control computer according to the flight control time sequence of the whole flight track of the carrier rocket.
The traditional name of the initiating explosive device igniting circuit in the carrier rocket (or missile weapon) is an integrated controller, which is generally designed as a stand-alone electronic instrument. At present, an initiating explosive device detonation circuit can be independently designed into a module or a complete machine, the module can be designed into the module to be embedded into other complete machines to operate, and the complete machine can independently operate in the whole electrical system.
The initiating explosive device detonation circuit is designed by adopting an electromagnetic relay at the beginning, the electromagnetic relay with the same power is large in size, and the integrated controller is difficult to be made into a module form; the electromagnetic relay is a semi-mechanical element, has the faults of contact mechanical shaking and contact adhesion, and has lower safety; the electromagnetic relay has a sensitive direction of action, and has a certain risk in design for strict installation requirements in order to avoid the flight direction; the electromagnetic relay comprises a magnetic circuit and a circuit, has higher requirements on the element production process, and is easy to introduce redundancy.
In order to overcome the defects of the electromagnetic relay, the current design mostly adopts a solid-state relay for design, and adopts the solid-state relay for design, although the solid-state relay overcomes the defects of partial electromagnetic relays, the power current is generally not large due to the limitation of the volume of a solid-state relay element. The design of the initiating explosive device detonation circuit which needs to carry out multipath or even dozens of paths of large currents has certain difficulty and is difficult to integrate in a module.
For convenience of integration, the MOS transistor is used for replacing the solid-state relay, however, when the MOS transistor on the branch fails, the object to be detonated connected with the branch cannot be detonated normally, resulting in lower reliability of the detonation circuit.
SUMMERY OF THE UTILITY MODEL
Based on this, the embodiment of the utility model provides a detonation circuit and ignition to solve the defect that detonation circuit reliability is low among the prior art.
According to a first aspect, an embodiment of the present invention provides an ignition circuit, including: and one end of the control branch is connected with the to-be-detonated object and comprises at least two controllable switches connected in parallel, the control ends of the at least two controllable switches are connected with each other, and the control ends are also connected with a detonation signal for controlling the to-be-detonated object to detonate.
Optionally, the method further comprises: and the protection unit is connected in parallel between the control end of the controllable switch and one end of the control branch.
Optionally, the method further comprises: and the driving unit is connected between the control end and the detonation signal in series.
Optionally, the method further comprises: and the anode of the discharge diode is connected with the control end of the controllable switch, and the cathode of the discharge diode is connected with the detonation signal.
Optionally, the method further comprises: and the peak eliminating unit is connected with one end of the control branch.
Optionally, the peak cancellation unit comprises: the anti-peak diode and the anti-peak resistor are connected in parallel; the cathode of the anti-peak diode is connected with one end of the control branch circuit, and the anode of the anti-peak diode is connected with one end of the anti-peak resistor; the other end of the anti-peak resistance is connected with the ground wire.
Optionally, the method further comprises: and the filtering unit is connected with the control end of the controllable switch.
Optionally, the method further comprises: and the current limiting unit is connected with one end of the control branch in series.
Optionally, comprising: and each control branch is connected with one object to be detonated.
According to a second aspect, an embodiment of the present invention provides an ignition circuit, including an ignition circuit as described in any one of the first aspect of the present invention.
Optionally, the method further comprises: and the driving circuit is connected with the detonation circuit and used for providing a detonation signal.
The utility model discloses technical scheme has following advantage:
the utility model provides a detonation circuit, include: and one end of the control branch is connected with the to-be-detonated object and comprises at least two controllable switches connected in parallel, the control ends of the at least two controllable switches are connected with each other, and the control ends are also connected with a detonation signal for controlling the to-be-detonated object to detonate. According to the detonation circuit, the control branch circuit for controlling the detonation of the to-be-detonated object is composed of at least two controllable switches connected in parallel, and when any one controllable switch works normally, the to-be-detonated object can be controlled to detonate, so that the reliability of the detonation circuit is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a specific example of a squib circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another specific example of the squib circuit of an embodiment of the present invention;
fig. 3 is a schematic diagram of another specific example of the squib circuit of an embodiment of the present invention;
fig. 4 is a schematic diagram of another specific example of the squib circuit of an embodiment of the present invention;
fig. 5 is a schematic view of a specific example of the squib according to the embodiment of the present invention;
fig. 6 is a schematic view of another specific example of the ignition device according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
The embodiment of the utility model provides a detonation circuit to improve the reliability of detonation circuit. As shown in fig. 1, the squib circuit includes: one end of the control branch circuit 1 is connected with the object 2 to be detonated, the control branch circuit 1 comprises at least two controllable switches 3 which are connected in parallel, the control ends of the at least two controllable switches 3 are connected with each other, and the control ends are also connected with a detonation signal for controlling the object 2 to be detonated.
In particular, as shown in fig. 2, the control branch 1 comprises two controllable switches 3 connected in parallel, the two controllable switches 3 being respectively denoted as a first controllable switch K1 and a second controllable switch K2. The first controllable switch K1 and the second controllable switch K2 are both N-type MOS transistors, which are respectively denoted as a first MOS transistor and a second MOS transistor. The drains of the two MOS tubes are connected with each other, and the drains are also connected with an external power supply VCC after being connected; the source electrodes of the two MOS tubes are connected with each other, and the source electrodes are also connected with the object to be detonated after being connected; the gates of the two MOS tubes are also connected with each other, the gates are connected with a detonation signal, the detonation signal controls the conduction and the disconnection of the MOS tubes, the MOS tubes are conducted after being conducted, the detonation object detonates, specifically, the MOS tubes are conducted when the detonation signal is high level, and the MOS tubes are disconnected when the detonation signal is low level. The control branch can control the normal detonation of the to-be-detonated object only by one controllable switch to work normally. Of course, in other embodiments, the type of the controllable switch may also be a switch such as an IGBT, a BJT, etc., and the controllable switch is not limited thereto and can be reasonably set according to the needs in practical applications.
It should be noted that the number of the controllable switches connected in parallel in this embodiment may be reasonably set according to actual needs, for example, the number of the controllable switches connected in parallel may also be set to be three, four or more.
According to the detonation circuit, the control branch circuit for controlling the detonation of the to-be-detonated object is composed of at least two controllable switches connected in parallel, and when any one controllable switch works normally, the to-be-detonated object can be controlled to detonate, so that the reliability of the detonation circuit is improved.
In an embodiment, the detonation circuit further includes: and the protection unit 4 is connected in parallel between the control end of the controllable switch and one end of the control branch.
Specifically, as shown in fig. 3, the protection unit 4 is connected in parallel between the gate and the source of the controllable switch 3, the protection unit 4 may be a protection resistor, one protection resistor is connected in parallel between the gate and the source of each controllable switch, the protection resistor connected in parallel between the gate and the source of the first controllable switch K1 is represented as a first protection resistor R156, and the protection resistor connected in parallel between the gate and the source of the second controllable switch K2 is represented as a second protection resistor R157. The protection resistor is added between the grid and the source to prevent the main circuit from being electrified to damage a switching device when the grid is open-circuited or the grid is damaged, the driving current can be limited, the controllable switch is protected, the resistance value of the protection resistor can be about 10k omega, the embodiment is only schematically illustrated, the limitation is not to be taken, and the resistance value of the protection resistor can be reasonably adjusted as required in practical application.
In an embodiment, the detonation circuit further includes: and the driving unit 5 is connected between the control end and the detonation signal in series. The drive unit provides a suitable drive signal to the control terminal of the controllable switch.
Specifically, as shown in fig. 3, the driving unit 5 may be a driving resistor, one driving resistor is connected between the gate of each controllable switch and the firing signal in series, the driving resistor connected between the gate of the first controllable switch K1 and the firing signal in series is represented as a first driving resistor R124, and the driving resistor connected between the gate of the second controllable switch K2 and the firing signal in series is represented as a second driving resistor R125. The suitable driving resistance on the grid electrode string can change the gradient of the front and back edges of a detonation signal (such as a pulse signal) and prevent oscillation, so that the voltage spike of the grid electrode is reduced; when the driving resistance is increased, the conduction time is prolonged, and the loss and the heating are intensified; when the driving resistance is reduced, di/dt is increased, and false conduction may occur, so that the device is damaged, and therefore, the size of the driving resistance should be selected to be a proper value according to the current capacity and voltage rating of the tube and the switching frequency, usually between several ohms and several tens of ohms (in a specific application, the driving resistance should be properly adjusted according to the actual situation).
In an embodiment, the detonation circuit further includes: and the anode of the discharge diode 6 is connected with the control end of the controllable switch, and the cathode of the discharge diode is connected with the detonation signal.
Specifically, as shown in fig. 3, the discharge diode 6 is connected in parallel across the driving unit 5, the discharge diode 6 connected in parallel across the first driving resistor R124 is denoted as a first discharge diode V51, and the discharge diode 6 connected in parallel across the second driving resistor R125 is denoted as a second discharge diode V52. The discharge diode can immediately discharge the level of the grid when the controllable switch is turned off, so that the discharge time is shortened, and the turn-off speed of the MOS tube is improved.
In an embodiment, the detonation circuit further includes: and the peak eliminating unit 7 is connected with one end of the control branch. The inductive object to be detonated can generate inverse peak voltage from a switch-on state to a switch-off state, and the inverse peak eliminating unit can eliminate the inverse peak voltage, so that the inverse peak voltage is prevented from interfering the normal work of the circuit, and the effect of protecting components is achieved.
Specifically, as shown in fig. 3, since the solenoid valve of the object to be detonated generates a directional electromotive force when the MOS transistor is turned off, a peak-canceling unit 7 is added to the circuit output, and the peak-canceling unit 7 includes: the peak-eliminating diode V83 and the peak-eliminating resistor R220 are connected in parallel; the negative electrode of the peak eliminating diode V83 is connected with one end of the control branch, and the positive electrode of the peak eliminating diode V83 is connected with one end of the peak eliminating resistor R220; the other end of the peak eliminating resistor R220 is connected with the ground GND. Of course, in other embodiments, the peak cancellation unit may also include only a diode, and may be reasonably arranged as needed.
In an embodiment, the detonation circuit further includes: and the filtering unit 8 is connected with the control end of the controllable switch and used for eliminating the interference of the control end of the controllable switch.
Specifically, as shown in fig. 3, the filter unit 8 may be a filter capacitor C195, one end of the filter capacitor is connected to the control end of the MOS transistor, and the other end of the filter capacitor is connected to the ground GND; of course, in other embodiments, the filtering unit may also be an RC filter, and the like, and may be reasonably set according to needs.
In an embodiment, the detonation circuit further includes: and the current limiting unit 9 is connected with one end of the control branch in series. The current limiting unit is used for limiting the current flowing into the object to be detonated and protecting the detonation circuit.
Specifically, the current limiting unit 9 may be a current limiting resistor Rx, and the resistance of the current limiting resistor Rx may be set reasonably according to actual conditions; of course, in other embodiments, the current limiting unit may also be other circuits with current limiting function, and may be set reasonably as required.
In an embodiment, the detonation circuit further includes: and each control branch is connected with an object to be detonated. The multi-path control branch can control the detonation of a plurality of objects to be detonated, and the control mode is more flexible.
The detonation signal on different control branches can be a detonation signal, so that one detonation signal can detonate the objects to be detonated on a plurality of control branches simultaneously; the detonation signals on the different control branches can be different detonation signals, specifically, one branch corresponds to one detonation signal, or two or three branches share one detonation signal, different detonation signals control different detonation branches, and the objects to be detonated on different branches can be detonated simultaneously or not.
Specifically, as shown in fig. 4, the detonation circuit includes n control branches, where n is a positive integer greater than or equal to 2, and is represented as a branch Z1 and a branch Z2 … and a branch Zn, each of which is connected in series with a current-limiting resistor and an object to be detonated, a branch Z1 is connected in series with a first current-limiting resistor Rx1 and a first object to be detonated r1, a branch Z2 is connected in series with a second current-limiting resistor Rx2 and second objects to be detonated r2, …, a branch Zn is connected in series with an nth current-limiting resistor Rxn and an nth object to be detonated rn, and the number of the controllable switches connected in parallel in different branches may be the same or different. When the current flowing through the branch is large, the number of the controllable switches connected in parallel is large, otherwise, when the current flowing through the branch is small, the number of the controllable switches connected in parallel can be small, and the number of the controllable switches connected in parallel in each branch can be reasonably set according to actual conditions. For example, the current flowing through branch Z1 is small, and the number of controllable switches connected in parallel on branch Z1 is 2; the current flowing in branch Z2 is relatively large, and the number of controllable switches connected in parallel in branch Z2 is 4.
It should be noted that the number of the control branches may be reasonably determined according to actual needs, for example, two control branches, three control branches, or more control branches are provided.
The present embodiment also provides an ignition device comprising an ignition circuit as mentioned in any of the above embodiments. The detonation device adopts the detonation circuit, and the reliability of the whole device is further improved.
In an embodiment, as shown in fig. 5, the above-mentioned igniter further includes: and the driving circuit 10 is connected with the detonation circuit and used for providing a detonation signal.
The following description will be made in detail by taking an explosive material to be detonated as an initiating explosive device. As shown in fig. 5 and 6, the initiating explosive device comprises an FPGA, a driving circuit and a MOS transistor. The FPGA selects A3P 1000-PQ 208I of ACTEL company, and integrates an IP core of a high-speed serial bus receiving end SC, a signal filtering IP and the like. LT4363 from LT corporation is used as a drive control chip which controls the MOS switches on and off by a control form of the charge pump, see fig. 5. The driving circuit and the MOS transistor are explained below.
In fig. 5, LT4363(N16) of LT corporation is used to control the on/off of the output, the chip is an input surge current control chip, in actual use, a surge current detection resistor is short-circuited, the circuit is always in a stable conduction state, and the on/off control of the circuit is realized by controlling an undervoltage UV end. The specific principle is that when the UV terminal voltage of the control chip LT4363 is greater than the threshold voltage of 1.27V, the control chip works normally, and a charge pump in the chip outputs a driving signal in a pressurizing manner; when the UV end of the control chip LT4363 is suspended or the voltage is less than the threshold voltage of 1.27V, the control chip stops working.
Once the initiating explosive device detonation circuit receives a timing sequence command sent by a flight control computer through an internal bus, the FPGA outputs a signal SX1 _ B to a control end UV of an LT4363 to enable the LT4363 to start working, and the threshold voltage of the UV is 1.27V. Since SX1 _ B is 5V, R310, 51K, R230, and 36K, the threshold voltage for LT4363 was calculated to be 2V. The voltage with the voltage difference of about 12V is output by the GATE end and the OUT end of the control chip, and the closing of the timing sequence MOS switch tube is controlled.
To reduce the printed board area, the MOS transistor in the initiating explosive device detonation circuit used BSC035N10NS5 from Infineon, whose main parameters are as follows. The working temperature is reduced to-55-175 ℃; the withstand voltage is 100V; the maximum working current is 100A; the maximum junction resistance was 3.5m Ω. The MOS tube of the initiating explosive device detonation circuit adopts a redundancy design, two MOS tubes are used for each path of output, and current is shared by 2 MOS tubes so as to reduce the total heat productivity.
It should be noted that, MOS transistors of other brands of other companies may be used to replace BSC035N10NS5 in this embodiment, and other driving circuits may be used to replace LT4363 in this embodiment as a control chip to drive the MOS transistor switch, so as to achieve the purpose of the present invention.
In order to realize the control of the multi-path initiating explosive device detonation circuit, the detonation device in the embodiment comprises an FPGA, a driving circuit, an MOS transistor, a photoelectric coupler and the like, and a functional block diagram is shown in fig. 6. And a control instruction of the flight control computer is sent to the FPGA through an internal bus for decoding and controlling, the FPGA outputs an effective time sequence signal, then the effective time sequence signal is output to the input end of the MOS tube by the driving circuit, and the MOS tube outputs an effective level to detonate the corresponding initiating explosive device. The initiating explosive device detonation circuit is also designed with a signal retest function, which comprises retest of the detonation state of the initiating explosive device and retest of the time sequence length. After the initiating explosive device detonation retest signal is isolated by the optical coupler, the detonation state of the initiating explosive device is read by the flight control computer through the FPGA.
For all the multipath initiating explosive device detonation circuits, the FPGA and the driving circuit are the same, and the MOS tube circuit adopts different schemes for each path according to different requirements of output current, redundancy, load characteristics and the like. For a time sequence with higher reliability requirement, the MOS tubes can be connected in series and parallel; for a time sequence with larger load current, 4 MOS tubes can be connected in parallel; for inductive load, the MOS tube output is grounded and an anti-peak circuit is added.
The detonation device in the embodiment has the following advantages: 1) the adopted MOS tube has small volume, but the flowing current is large, dozens of or even hundreds of initiating explosive devices can be integrated on one printed board, and the volume of an electronic instrument is greatly reduced; 2) the MOS tube adopted has small internal resistance, and the flowing large current basically does not generate heat, thereby reducing the workload of heat dissipation design of the instrument; 3) the MOS tube adopted has high switching speed, sensitive reflection, no sensitive direction and convenient installation, and reduces the design difficulty of layout and wiring; 4) the MOS tube driving circuit is simple in design, an integrated chip with a charge pump function is adopted, too much hardware is not added on the original circuit, and the circuit design is simple and reliable. The original whole machine product with larger volume is designed into a board card module, so that the initiating explosive device detonation circuit is possibly integrated in an integrated electronic system. The initiating explosive device detonation circuit is used as a component of the whole system (complete machine), so that the integration level of an electrical product is improved, the weight and the complexity of the electrical system are reduced, the reliability of the whole electrical system is finally improved, and the requirement on the flight control of a carrier rocket is met.
The igniter can meet the requirement of controlling ignition (electromagnetic valve switch) of the initiating explosive device of the commercial carrier rocket, the circuit design is safe and reliable, the integration level is high, the number of time sequence paths output by the initiating explosive device igniting circuit with the same volume is more than five times of that of the traditional scheme, the output current is also more than five times, and the designed circuit is favorable for the integration and miniaturization design of electronic equipment or an electrical system through environmental test and system test; the method is particularly suitable for integrated controllers, time sequence separation devices and engine flow regulation devices of carrier rockets (or missile weapons) and military or civil equipment requiring large-current switching capacity control.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (11)
1. An initiation circuit, comprising:
and one end of the control branch is connected with the to-be-detonated object and comprises at least two controllable switches connected in parallel, the control ends of the at least two controllable switches are connected with each other, and the control ends are also connected with a detonation signal for controlling the to-be-detonated object to detonate.
2. The detonation circuit of claim 1, further comprising:
and the protection unit is connected in parallel between the control end of the controllable switch and one end of the control branch.
3. The detonation circuit of claim 1, further comprising:
and the driving unit is connected between the control end and the detonation signal in series.
4. The detonation circuit of claim 1, further comprising:
and the anode of the discharge diode is connected with the control end of the controllable switch, and the cathode of the discharge diode is connected with the detonation signal.
5. The detonation circuit of claim 1, further comprising:
and the peak eliminating unit is connected with one end of the control branch.
6. The detonation circuit of claim 5, wherein the anti-peaking unit comprises:
the anti-peak diode and the anti-peak resistor are connected in parallel;
the cathode of the anti-peak diode is connected with one end of the control branch circuit, and the anode of the anti-peak diode is connected with one end of the anti-peak resistor;
the other end of the anti-peak resistance is connected with the ground wire.
7. The detonation circuit of claim 1, further comprising:
and the filtering unit is connected with the control end of the controllable switch.
8. The detonation circuit of claim 1, further comprising:
and the current limiting unit is connected with one end of the control branch in series.
9. The detonation circuit of any of claims 1-8, comprising:
and each control branch is connected with one object to be detonated.
10. An explosive device, comprising:
a squib circuit as claimed in any one of claims 1 to 9.
11. The explosive device according to claim 10, further comprising:
and the driving circuit is connected with the detonation circuit and is used for providing the detonation signal.
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| CN201920205447.0U CN209991883U (en) | 2019-02-15 | 2019-02-15 | Detonation circuit and detonation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780953A (en) * | 2019-02-15 | 2019-05-21 | 北京星际荣耀空间科技有限公司 | Detonation circuit and apparatus to cause bursting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780953A (en) * | 2019-02-15 | 2019-05-21 | 北京星际荣耀空间科技有限公司 | Detonation circuit and apparatus to cause bursting |
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Address after: 100045 1-14-214, 2nd floor, 136 Xiwai street, Xicheng District, Beijing Patentee after: Beijing Star glory Space Technology Co.,Ltd. Address before: 329, floor 3, building 1, No. 9, Desheng South Street, Daxing Economic and Technological Development Zone, Beijing 100176 Patentee before: BEIJING XINGJIRONGYAO SPACE TECHNOLOGY Co.,Ltd. |
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