Initiating explosive device ignition circuit and module

An ignition circuit and pyrotechnics technology, applied in the field of pyrotechnics ignition, can solve the problems of increasing system volume, weight and system complexity, complex protection circuits, control signal jitter, etc., to expand the application range, eliminate influence, reduce Effect of Voltage Demand

Pending Publication Date: 2021-12-14

BEIJING KEYTONE ELECTRONICS RELAY

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AI-Extracted Technical Summary

Problems solved by technology

[0004] However, the pyrotechnic ignition circuit controlled by conventional relays, such as figure 1 As shown, the input side of the magnetic isolation circuit requires a relatively high input voltage, and its output side shares a part of the circuit with the ignition power supply. The relatively high voltage of the ignition power supply will affect the relatively low voltage of the detection power supply and aff...

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Method used

Application a kind of pyrotechnic product ignition circuit of the application is made into circuit module, obtains a kind of pyrotechnic product ignition module of the present application, and ignition module adopts plug and play structure, each power supply input end, is used to connect fire The two output terminals of the product and the output terminal of the state detection signal adopt a needle structure, which is convenient to use and simplifies the overall circuit structure of the system at the same time.

Ignition control circuit comprises the time-delay circuit and control switch circuit that are connected to each other, and time-delay circuit is used for carrying out time-delay voltage division to ignition command signal, reduces the electromagnetic interference of ignition command signal; Control switch circuit is used for dividing according to delay time The pressed ignition command signal controls the switch to be turned on or off, so that the two ends of the pyrotechnic product are connect...

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Abstract

The invention discloses an initiating explosive device ignition circuit and module. The initiating explosive device ignition circuit comprises an ignition control circuit and an initiating explosive device state detection circuit which are connected with each other, wherein the ignition control circuit adopts an ignition power supply and a control power supply and is used for controlling the ignition power supply applied to an initiating explosive device to be switched on or off according to a control instruction; the initiating explosive device state detection circuit adopts a detection power supply, two input ends of the initiating explosive device state detection circuit are connected to two ends of the initiating explosive device in parallel, and the initiating explosive device state detection circuit is used for detecting whether the ignition power supply applied to the initiating explosive device is switched on or not; and the voltage value of the ignition power supply is equal to that of the control power supply. According to the initiating explosive device ignition circuit and module, a time delay circuit is arranged in the ignition control circuit, so that electromagnetic interference is reduced, and meanwhile, the voltage of an ignition instruction is reduced, so that the voltage requirement of an electromagnetic isolation circuit is reduced, and the application range of an electromagnetic isolator is expanded.

Application Domain

Blasting

Technology Topic

Automotive engineeringIgnition control +4

Image

Examples

Experimental program(4)

Example Embodiment

[0031] Specific Example 1

[0032] One kind of the pyrotechnic ignition circuit of the present application, such as figure 2 Shown, comprising a control circuit and an ignition pyrotechnic state detection circuit, a control circuit connected to the output of an ignition pyrotechnic input state detection circuit, an ignition control circuit uses two power supplies, a power supply V1 is an input ignition command, the other a power supply V2 is applied to the EED, pyrotechnics state detection circuit uses a power source for applying a voltage on the state signal detecting EED.

[0033] Firing control circuit includes a delay circuit connected to each other and controls the switch circuit, the delay circuit configured to delay an ignition command signal dividing, reducing electromagnetic interference ignition command signal; a control circuit according to the switching delay dividing an ignition command signal to the control switch on or off both ends of the pyrotechnic power supply V2 is connected to both ends or disconnected from the power V2.

[0034] Pyrotechnics state detection circuit comprises a voltage dividing circuit and optical isolation circuit connected thereto, the voltage divider circuit two input terminals respectively connected to power input terminal EED for the voltage applied across the OUT1 EED +, VOUT1 - dividing its input connected to the output of the optical isolation circuits, optical isolation circuit in accordance with the divided voltage of the presence or absence of EED, VOUT2 is outputting a detection signal, the detection circuit employs optical isolation for power supply V3.

[0035] In one embodiment, the voltage value of the power supply voltage value V2 of the power supply V1 is equal to the specific embodiments of the present application, the voltage value of the power supply V3 is smaller than the voltage value V1.

Example Embodiment

[0036] Specific Example 2

[0037] One kind of the pyrotechnic ignition circuit of the present application, such as image 3 Shown, it comprises an RC delay circuit by the first resistor R1, a first capacitor C1, a second capacitor C2, the third capacitor C3, wherein a first capacitor C1, a second capacitor C2, a third capacitor C3 connected in parallel, composition parallel combination of the capacitor, the first resistor R1 connected in series with the parallel combination of the capacitor, form an RC delay circuit.

[0038] Using three parallel capacitors, each capacitor to respond to magnetic interference signals of different frequency filtering to reduce the effect of interference signal to control the switching circuit.

[0039] Both ends of the capacitor parallel combination, connected in parallel with two input control switch circuit. Controls the switch circuit comprises a solid state relay K1 magnetically isolated, two magnetic isolation input side of the solid-state relay K1 are connected to the input terminal of the output capacitor in parallel with a combination of two two-terminal, solid-state relays K1 magnetic isolation in series on the output side positive terminal of the ignition power supply EED between a first end, a first output terminal connected to the positive terminal of the ignition power supply V2, which is a second output terminal connected to a first terminal of an ignition explosive device, the output voltage VOUT1 +.

[0040] A second end connected to the negative terminal of the ignition power supply V2, the output voltage VOUT1- EED.

[0041] Magnetic isolation using a solid-state relay switch EED, having a short reaction time, low electromagnetic radiation and strong instantaneous overload characteristics.

[0042] Internal magnetically isolated solid state relay further includes Schmitt characteristics, the control voltage on condition prior to achieving high input impedance, input current is small, typically less than 1mA, difficult to produce an output drive signal to maintain the OFF state; and a control voltage reaches ground controlling the energy (voltage and current) through the conditions require large; a control voltage or current reaches the on condition, the relay input impedance decreases momentarily input current is 5mA or more mutations to produce an output drive signal to achieve the oN state, the pyrotechnic ignition, even after a control voltage (current) fluctuations, low input impedance relays, tends to be more conductive, is not susceptible to interference signals mistakenly turned off.

[0043] Voltage dividing circuit comprises a series connection of a second resistor R2, a third resistor R3, one end of the second resistor R2 is connected to a first end of the EED, one end of the third resistor R3 is connected to a second end of the EED , a second optical isolation circuit input side of the input terminal, a second resistor R2, a connection point of the third resistor R3 is connected to a first input terminal side of the optical isolation circuit.

[0044]A first output terminal of the output side of the optical isolation circuit as an output status signal, and the positive terminal through the pull-circuit detecting resistor R4 is connected to V3, a second output terminal side is connected to the negative terminal of the detection circuit V3.

[0045] Optical isolation circuit comprises optocoupler K2.

[0046] After the control instruction, by interference with the step-down delay circuit controlling the magnetic circuit K1 relay isolating the solid turned on or off, thereby controlling the ignition power supply V2 is connected or disconnected from the pyrotechnics, fire dividing circuit after the voltage across the work product is divided, the control optical isolation circuit K2 to output a corresponding detection signal.

[0047] Pyrotechnics state detection circuit, optically isolated solid state relay implemented EED passive state detecting switch, to avoid the potential risk of active detection passage brings reduced pyrotechnic instantaneous switching state of the electromagnetic interference sampling circuit.

[0048] Specifically, when the control command transmitted by, the delay through the RC circuit down, the solid magnetic isolation control relay K1 is turned on, the ignition power supply V2 to the first end of the positive terminal of the EED turned, for the first EED a negative terminal connected to the second end of the ignition power supply V2, V2 is applied to the power supply ignition pyrotechnics, the voltage dividing circuit is applied to the EED dividing, optical isolation circuit controlling the conduction state detection signal goes low flat.

[0049] When the control command disappears, magnetically isolated solid state relay is turned off, the voltage applied to the EED disappeared, optical isolation circuit is turned off, the state detection signal goes high.

[0050] After down RC delay circuit, voltage control instruction is reduced, magnetically isolated solid state relay also reduced voltage requirements, to expand the scope of magnetically isolated solid state relay, and reducing the cost.

[0051] Specifically, the ignition voltage power supply V1 is 28.5V, the control command value is also the supply voltage 28.5V, the detection of the power supply voltage V3 is 5V.

[0052] In order to ensure the ignition pyrotechnics reliable power supply positive terminal connected to the switch control circuit comprises at least two magnetically isolated solid state relay connected in parallel, such as Figure 4 , Each magnetically isolated solid state relay in parallel to the input side of the two input terminal connected to the output of the delay circuit, a first output terminal connected to the output side of each of the ignition power supply positive terminal, a second terminal connected to the output of the EED end.

Example Embodiment

[0053] DETAILED Third Embodiment

[0054] One kind of the pyrotechnic ignition circuit of the present application, such as Figure 5 , The difference with the embodiment 2 in that: the second end of the explosive device is also connected in series with a second switch control circuit. In this circuit, the two ends of the pyrotechnic simultaneous connection control switch circuit, power is applied to ensure the reliability of the EED.

[0055] The second control circuit includes a switching circuit magnetically isolated, two magnetic isolation circuit input side of the input terminal and the output terminal of the delay circuit in parallel, a first output terminal connected to the second end side of EED, the output side a second output terminal is connected to an ignition power V2-.

[0056] Specifically, the magnetic circuit comprises a magnetic separator isolating the solid state relay K4, two input magnetic isolation of the solid state relay K4 are connected to the input side of the output terminal of two RC delay circuit, the input-side parallel combination is connected in parallel with the capacitor.

[0057] When the control command transmitted by, the delay through the RC circuit down, the solid state relay control magnetic isolation K1 / K4 turned pyrotechnic ignition power two ends of the communication terminal V2, V2 is applied to the power supply ignition pyrotechnics, after the voltage dividing circuit is applied to the EED dividing, optical isolation circuit controlling the conduction state detection signal goes low.

[0058] When the control command disappears, magnetically isolated solid state relay K1 / K4 off, two pyrotechnic ignition power supply terminal V2 and the two ends off, the voltage applied to the EED disappeared, optical isolation circuit is turned off, the state detection signal becomes high level.

[0059] To ensure reliable ignition of the pyrotechnic connector negative power supply terminal, the switch control circuit comprises at least two magnetically isolated solid state relay connected in parallel, each of the two magnetic isolation of the solid state relay input terminal of the input side are connected in parallel at the output of the delay circuit, a first output terminal connected to an output side of each second end of EED, a second output terminal connected to the negative terminal of the power firing.

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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

Reduce electromagnetic interference

Radio frequency antenna system and high-speed digital data link to reduce electromagnetic interference for wireless communications

ActiveUS7558348B1Reduce electromagnetic interferenceReduce manufacturing complexity associateError preventionPulse automatic controlRadio frequencyFrequency band

Owner:NVIDIA CORP

Initiating explosive device ignition circuit and module

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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