Ignition circuit of electric explosion device
By using a serial ignition circuit and opposite control voltage signals in the ignition circuit of the ignition circuit of the ignition device, and combining the current limiting circuit, the problem of abnormal detonation of the ignition device is solved, and the reliability and safety of the ignition circuit are improved.
Patent Information
- Application Number
- CN202010343899.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-04-27
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2040-04-27
AI Technical Summary
The abnormal detonation of the existing electric explosion device ignition circuit outside the predetermined ignition time and location may lead to safety accidents, and the redundant design improves reliability but also increases the probability of abnormal ignition.
Using a serial ignition circuit and using the opposite control voltage signal in the ignition circuit control chip, combined with energy storage circuit and voltage conversion chip, the current limiting circuit design of NPN transistor and MOS tube ensures that the explosive device does not fail in the event of a fault. Abnormal ignition.
It effectively reduces the probability of abnormal ignition of electric explosive devices, improves the reliability and detectability of the ignition circuit, and ensures the safety and normal operation of the system.
Smart Images
Figure CN111412801B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of electric ignition devices, and in particular to an ignition circuit of an electric explosion device. Background Art
[0002] As a miniaturized sensitive explosion energy source, electric explosive devices are widely used in civil fields such as automobile airbags and personal protective airbags, and are also widely used in military projects such as strategic missiles, nuclear weapons and aerospace systems. The reliable operation of electric explosive devices has a direct impact on the safety of the entire system. Under any circumstances other than the predetermined ignition time and ignition location, the electric explosive devices will not detonate abnormally due to human factors, components and circuits, and other random factors, resulting in dangerous accidents and endangering the safety of operators, sites and missiles. Existing ignition circuits mostly use redundant designs to improve the ignition reliability of the ignition system, but at the same time increase the probability of abnormal ignition of the system. Summary of the invention
[0003] In order to solve the above problems existing in the prior art, the present invention provides an ignition circuit for an electric explosive device, which adopts a serial ignition circuit. At the same time, the ignition circuit control chip adopts opposite control voltage signals for the two ignition signals in the serial ignition circuit, thereby effectively preventing abnormal ignition of the electric explosive device due to failure of the ignition circuit control chip or the serial ignition circuit.
[0004] The present invention provides the following technical solutions:
[0005] An electric explosion device ignition circuit comprises an ignition circuit control chip, a voltage conversion chip, an energy storage circuit, and a serial ignition circuit, wherein the voltage conversion chip is connected to the energy storage circuit, the energy storage circuit is connected to the serial ignition circuit, the serial ignition circuit is provided with a first ignition circuit, an electric explosion device, and a second ignition circuit, the two ends of the electric explosion device are respectively connected to the first ignition circuit and the second ignition circuit, the ignition circuit control chip is provided with a first ignition control terminal and a second ignition control terminal, the first ignition control terminal is connected to the first ignition circuit, the second ignition control terminal is connected to the second ignition circuit, and the control voltage signal of the first ignition control terminal is opposite to the control voltage signal of the second ignition control terminal.
[0006] Furthermore, the ignition circuit control chip is also provided with an electric explosion device voltage detection terminal, and the electric explosion device voltage detection terminal is connected to the electric explosion device.
[0007] Furthermore, the ignition circuit control chip is also provided with an ignition voltage detection terminal, and the ignition voltage detection terminal is connected to the energy storage circuit.
[0008] Furthermore, the first ignition circuit includes an NPN transistor and a P-channel MOS transistor, the B pole of the NPN transistor is connected to the first ignition control end, the E pole of the NPN transistor is connected to the G pole of the P-channel MOS transistor, the C pole of the NPN transistor is grounded, the S pole of the P-channel MOS transistor is connected to the energy storage circuit, and the D pole of the P-channel MOS transistor is connected to the electric explosion device.
[0009] Furthermore, a first current limiting resistor is provided between the B pole of the NPN transistor and the first ignition control end, a second current limiting resistor is provided between the G pole of the P-channel MOS tube and the S pole of the P-channel MOS tube, and a fourth current limiting resistor is provided between the S pole of the P-channel MOS tube and the D pole of the P-channel MOS tube.
[0010] Furthermore, the second ignition circuit is provided with an N-channel MOS tube, a G pole of the N-channel MOS tube is connected to the second ignition control terminal, an S pole of the N-channel MOS tube is grounded, and a D pole of the N-channel MOS tube is connected to the electric explosion device.
[0011] Furthermore, a third current limiting resistor is provided between the S pole of the N-channel MOS tube and the D pole of the N-channel MOS tube.
[0012] Furthermore, the energy storage circuit is composed of one energy storage capacitor or a plurality of energy storage capacitors connected in parallel.
[0013] Compared with the prior art, the present invention has the following advantages:
[0014] 1. The present invention adopts a serial ignition circuit, and the ignition circuit control chip adopts opposite control voltage signals for two ignition signals in the serial ignition circuit, which effectively prevents abnormal ignition of the electric explosion device when the ignition circuit control chip or the serial ignition circuit fails.
[0015] 2. The ignition circuit control chip of the present invention monitors whether the ignition voltage, the serial ignition circuit, and the electric explosion device are in a normal state, thereby improving the detectability and reliability of the ignition circuit of the electric explosion device.
[0016] 3. The present invention has the advantages of high reliability, high safety, and detectable status. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a circuit principle block diagram of the present invention;
[0018] Figure 2 It is a circuit principle diagram of the first embodiment of the present invention. DETAILED DESCRIPTION
[0019] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.
[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.
[0021] Embodiment 1:
[0022] See also Figure 1 An electric explosion device ignition circuit comprises an ignition circuit control chip 1, a voltage conversion chip 2, an energy storage circuit 3, and a serial ignition circuit, wherein the voltage conversion chip 2 is connected to the energy storage circuit 3, and the energy storage circuit 3 is connected to the serial ignition circuit, and the serial ignition circuit is provided with a first ignition circuit 4, an electric explosion device 5, and a second ignition circuit 6, and the two ends of the electric explosion device 5 are respectively connected to the first ignition circuit 4 and the second ignition circuit 6, and the ignition circuit control chip is provided with a first ignition control terminal F1 and a second ignition control terminal F2, the first ignition control terminal is connected to the first ignition circuit, and the second ignition control terminal is connected to the second ignition circuit, and the control voltage signal of the first ignition control terminal is opposite to the control voltage signal of the second ignition control terminal.
[0023] See also Figure 2 In this embodiment, the ignition circuit control chip 1 adopts the STM32F103 single-chip microcomputer, which can control the voltage and ignition timing of the first ignition control terminal F1 and the second ignition control terminal F2. The voltage conversion chip 2 adopts a DC-DC module, which can convert the system power supply voltage into the voltage required for the ignition of the electric explosion device. The energy storage circuit 3 is composed of an energy storage capacitor C1 or multiple energy storage capacitors C1, C2, ..., Cn in parallel. After the system is powered on, energy is stored, and ignition energy can be provided in a short time when the electric explosion device is ignited. The number and capacitance of the energy storage capacitor can be calculated or simulated according to the ignition parameters of the electric explosion device. The first ignition circuit 4 and the second ignition circuit 6 respectively control the two ends of the electric explosion device 5, and the electric explosion device ignites when the first ignition circuit 4 and the second ignition circuit 6 are both turned on.
[0024] See also Figure 2In this embodiment, the first ignition circuit includes an NPN transistor Q2 and a P-channel MOS transistor Q3, the B pole of the NPN transistor is connected to the first ignition control terminal, the E pole of the NPN transistor is connected to the G pole of the P-channel MOS transistor, the C pole of the NPN transistor is grounded, the S pole of the P-channel MOS transistor is connected to the energy storage circuit, and the D pole of the P-channel MOS transistor is connected to the electric explosion device. A first current limiting resistor R1 is provided between the B pole of the NPN transistor and the first ignition control terminal, a second current limiting resistor R2 is provided between the G pole of the P-channel MOS transistor and the S pole of the P-channel MOS transistor, and a fourth current limiting resistor R4 is provided between the S pole of the P-channel MOS transistor and the D pole of the P-channel MOS transistor.
[0025] When the first ignition control terminal F1 is at a high level, the NPN transistor Q2 is in a cut-off state, the voltage across R2 is 0V, the voltage between the G pole and the S pole of the P-channel MOS tube Q3 is 0V, and Q3 is in a cut-off state; when the first ignition control terminal F1 is at a low level, the NPN transistor Q2 is in a conduction state, the voltage across R2 increases, the voltage between the G pin and the S pin of the P-channel MOS tube Q3 increases, and Q3 is in a conduction state.
[0026] See also Figure 2 In this embodiment, the second ignition circuit is provided with an N-channel MOS tube Q1, the G pole of the N-channel MOS tube is connected to the second ignition control terminal, the S pole of the N-channel MOS tube is grounded, and the D pole of the N-channel MOS tube is connected to the electric explosion device. A third current limiting resistor R3 is provided between the S pole of the N-channel MOS tube and the D pole of the N-channel MOS tube.
[0027] When the second ignition control terminal F2 is at a low level, the N-channel MOS transistor Q1 is in an off state; when the second ignition control terminal F2 is at a high level, the N-channel MOS transistor Q1 is in an on state.
[0028] When the first ignition control terminal F1 is at a low level and the second ignition control terminal F2 is at a high level, the control voltage signals of the two ignition control terminals are opposite, and the first ignition circuit and the second ignition circuit are both turned on. The ignition circuit control chip uses opposite control voltage signals for the two ignition signals in the serial ignition circuit, which can prevent the first ignition control terminal F1 and the second ignition control terminal F2 from being reset to a high level or a low level when the ignition circuit control chip fails, and can effectively reduce the probability of abnormal ignition of the electric explosion device.
[0029] In addition, since the electric explosion device is a disposable device, the existing ignition circuit can only determine whether the system is normal by detecting the resistance value of the electric explosion device, but cannot detect whether the ignition circuit can work normally, resulting in the system detection being normal but the electric explosion device cannot be started normally due to a fault in the ignition circuit.
[0030] See also Figure 2 In this embodiment, the ignition circuit control chip is further provided with an electric explosion device voltage detection terminal AD2, and the electric explosion device voltage detection terminal is connected to the electric explosion device.
[0031] The ignition circuit control chip can detect the voltage value at one end of the electric explosion device through the electric explosion device voltage detection terminal AD2 to detect whether the first ignition circuit, the electric explosion device, and the second ignition circuit are in a normal state and can work normally and reliably.
[0032] When the first ignition control terminal F1 is at a high level and the second ignition control terminal F2 is at a low level, the first ignition circuit and the second ignition circuit are both disconnected, and the electric explosion device voltage detection terminal AD2 detects the voltage value and compares it with the normal voltage value to detect whether the electric explosion device is disconnected and whether the resistance value is normal.
[0033] When the first ignition control terminal F1 and the second ignition control terminal F2 are both at low levels, the first ignition circuit is turned on and the second ignition circuit is turned off, the voltage detection terminal AD2 of the electric explosion device detects the voltage value and compares it with the normal voltage value to detect whether the first ignition circuit can work normally.
[0034] When the first ignition control terminal F1 and the second ignition control terminal F2 are both at high levels, the first ignition circuit is disconnected and the second ignition circuit is turned on, the voltage detection terminal AD2 of the electric explosion device detects the voltage value and compares it with the normal voltage value to detect whether the second ignition circuit can work normally.
[0035] See also Figure 2 In this embodiment, the ignition circuit control chip is further provided with an ignition voltage detection terminal AD1, and the ignition voltage detection terminal is connected to the energy storage circuit. The ignition circuit control chip detects the voltage value of the ignition voltage through the ignition voltage detection terminal AD1 to monitor whether the ignition voltage meets the ignition requirement of the electric explosion device.
[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.
Claims
1. An ignition circuit for an electric explosive device, characterized in that: It includes an ignition circuit control chip, a voltage conversion chip, an energy storage circuit, and a serial ignition circuit. The voltage conversion chip is connected to the energy storage circuit, and the energy storage circuit is connected to the serial ignition circuit. The serial ignition circuit is provided with a first ignition circuit, an electric explosion device, and a second ignition circuit. The two ends of the electric explosion device are respectively connected to the first ignition circuit and the second ignition circuit. The ignition circuit control chip is provided with a first ignition control terminal and a second ignition control terminal. The first ignition control terminal is connected to the first ignition circuit, and the second ignition control terminal is connected to the second ignition circuit. The control voltage signal of the first ignition control terminal is opposite to the control voltage signal of the second ignition control terminal. The first ignition circuit includes an NPN transistor and a P-channel MOS transistor, the B pole of the NPN transistor is connected to the first ignition control terminal, the E pole of the NPN transistor is connected to the G pole of the P-channel MOS transistor, the C pole of the NPN transistor is grounded, the S pole of the P-channel MOS transistor is connected to the energy storage circuit, and the D pole of the P-channel MOS transistor is connected to the electric explosion device; A first current limiting resistor is provided between the B pole of the NPN transistor and the first ignition control terminal, a second current limiting resistor is provided between the G pole of the P-channel MOS tube and the S pole of the P-channel MOS tube, and a fourth current limiting resistor is provided between the S pole of the P-channel MOS tube and the D pole of the P-channel MOS tube; The second ignition circuit is provided with an N-channel MOS tube, a G pole of the N-channel MOS tube is connected to the second ignition control terminal, an S pole of the N-channel MOS tube is grounded, and a D pole of the N-channel MOS tube is connected to the electric explosion device.
2. An ignition circuit for an electric explosive device according to claim 1, characterized in that: The ignition circuit control chip is also provided with an electric explosion device voltage detection terminal, and the electric explosion device voltage detection terminal is connected to the electric explosion device.
3. An electric explosion device ignition circuit according to claim 1 or 2, characterized in that: The ignition circuit control chip is also provided with an ignition voltage detection terminal, and the ignition voltage detection terminal is connected to the energy storage circuit.
4. The ignition circuit of an electric explosion device according to claim 1, characterized in that: A third current limiting resistor is provided between the S pole of the N-channel MOS tube and the D pole of the N-channel MOS tube.
5. An electric explosion device ignition circuit according to claim 1 or 2, characterized in that: The energy storage circuit is composed of one energy storage capacitor or a plurality of energy storage capacitors connected in parallel.