Dual-control ignition control device

Abstract

The invention provides a dual-control ignition control device which comprises a power supply circuit, a main control circuit and an ignition control circuit, and the power supply circuit supplies power to the main control circuit and the ignition control circuit; the main control circuit is in communication connection with the ignition control circuit and sends an ignition control signal to the ignition control circuit. An analog quantity control signal and a digital quantity control signal can be adopted at the same time to control ignition of the initiating explosive device, the ignition reliability of the initiating explosive device is greatly improved, multiple paths of initiating explosive device ignition control and protection circuits can be conveniently integrated and installed to form an independent product, and overall selection of an aircraft is facilitated; the possibility of external signal interference is reduced, and meanwhile, by means of productization design facilitating modularization and solidification of the technical state, test verification and reliability improvement can be easily carried out through modularization, and modular combination and selection are convenient to adapt to the use requirements of different aircrafts.

Description

Technical Field

[0001] The invention relates to a dual-control ignition control device, belonging to the technical field of ignition devices. Background Art

[0002] Ignition control devices are primarily used to control the ignition of pyrotechnic devices on demand during flight and to provide safety protection for pyrotechnic circuits during normal operations. Previously, ignition control functions were integrated into other devices, using a single method to control ignition, resulting in high coupling with other devices and insufficient reliability. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a dual-control ignition control device, which can simultaneously use analog control signals and digital control signals to control the ignition of pyrotechnics, greatly improving the ignition reliability of pyrotechnics, and facilitating the integrated installation of multi-channel pyrotechnic ignition control and protection circuits to form an independent product, which is convenient for the overall selection of aircraft.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides a dual-control ignition control device, comprising a power supply circuit, a main control circuit, and an ignition control circuit. The power supply circuit supplies power to the main control circuit and the ignition control circuit; the main control circuit is communicatively connected to the ignition control circuit and sends an ignition control signal to the ignition control circuit; the core of the main control circuit is an MCU, and the MCU has multiple connections to multiple ignition control signal output terminals in the ignition control circuit, with each connection branching off to a digital signal output terminal and an analog signal output terminal.

[0006] The digital signal output terminal is connected via an ignition module in an ignition control circuit.

[0007] The analog signal output terminal is connected via an optocoupler circuit in the ignition control circuit.

[0008] The ignition control circuit is connected to the input link of the main control circuit, and each path is controlled to be on and off by a triode circuit, and the rear stage of the triode circuit is connected to the digital signal output end and the analog signal output end.

[0009] The main control circuit communicates with the outside world via RS422.

[0010] The power supply circuit has a voltage regulator chip that outputs 5V voltage. The output of the voltage regulator chip is connected to the ignition module to provide voltage for the digital signal output end. The output of the voltage regulator chip is also connected to a power supply chip. The power supply chip outputs 3.3V and is connected to the main control circuit to power the MCU.

[0011] The circuit of the digital signal output end in the ignition control circuit is connected to the igniter check contact through a switch.

[0012] The power chip also outputs 1.8V and is connected to the main control circuit to provide power for the MCU in a low-power state.

[0013] The triode circuit is connected in parallel with a capacitor and a resistor.

[0014] The ignition control signal output terminal and the analog signal output terminal both have 8 channels.

[0015] The beneficial effects of the present invention are that analog control signals and digital control signals can be used simultaneously to control the ignition of pyrotechnics, greatly improving the reliability of pyrotechnic ignition, facilitating the integrated installation of multi-channel pyrotechnic ignition control and protection circuits to form an independent product, and facilitating the overall selection of aircraft; reducing the possibility of interference from external signals, and at the same time, through the convenient modular product design, solidifying the technical status, and facilitating modular testing and verification, reliability improvement, and convenient modular combination selection to meet the use requirements of different aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of module connections according to at least one embodiment of the present invention;

[0017] Figure 2 yes Figure 1 Circuit connection diagram. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0019] Example 1

[0020] like Figure 1 、 Figure 2 The dual-control ignition control device shown includes a power supply circuit, a main control circuit, and an ignition control circuit. The power supply circuit supplies power to the main control circuit and the ignition control circuit. The main control circuit is communicatively connected to the ignition control circuit and transmits ignition control signals to the ignition control circuit. The core of the main control circuit is an MCU, which has multiple connections to multiple ignition control signal output terminals in the ignition control circuit, with each connection branching off to a digital signal output terminal and an analog signal output terminal.

[0021] Therefore, based on the present invention, the ignition of pyrotechnics is controlled by both analog control signals and digital control signals, which can effectively improve the ignition reliability of pyrotechnics, and can complete the safety protection function, inspection function, communication control and analog control of multiple igniter ignition functions of multiple igniters. Therefore, it is easy to form an ignition control circuit into a product, which has the advantages of low cost and small size and can be adapted to different aircraft.

[0022] Example 2

[0023] Based on embodiment 1, the digital signal output terminal is connected through the ignition module in the ignition control circuit.

[0024] Furthermore, the analog signal output terminal is connected via an optocoupler circuit in the ignition control circuit.

[0025] Furthermore, the ignition control circuit is connected to the input link of the main control circuit, and each path is controlled to be on and off by a triode circuit, and the rear stage of the triode circuit is connected to the digital signal output end and the analog signal output end.

[0026] Furthermore, a capacitor and a resistor are connected in parallel to the transistor circuit.

[0027] Preferably, there are 8 ignition control signal output terminals.

[0028] Example 3

[0029] Based on Example 1, the main control circuit communicates with the outside world via RS422.

[0030] Furthermore, there is a voltage regulator chip in the power supply circuit that outputs 5V voltage. The output of the voltage regulator chip is connected to the ignition module to provide voltage for the digital signal output end. The output of the voltage regulator chip is also connected to a power supply chip. The power supply chip outputs 3.3V and is connected to the main control circuit to power the MCU.

[0031] Furthermore, the circuit at the digital signal output end of the ignition control circuit is connected to the ignition device check contact through a switch.

[0032] Furthermore, the power chip also outputs 1.8V and connects to the main control circuit to provide power for the MCU in a low-power state.

[0033] Example 4

[0034] Based on the above embodiment, an ignition control device with eight-way pyrotechnic device ignition protection function and both analog control and digital control is realized.

[0035] Generally, the ignition control device is in the shape of a rectangular parallelepiped, with a volume no greater than 175 mm × 70 mm × 30 mm (excluding the boss).

[0036] Specifically, the ignition control device includes a power supply circuit, a main control circuit and an ignition control circuit. The connection block diagram is shown in Figure 1 , circuit principle see Figure 2 , the working principle is as follows:

[0037] The ignition control module initially short-circuit's "igniters 1-8" for protection. During an inspection, upon receiving the "igniter protection release" signal, the ignition control module disconnects the short-circuit protection circuit and connects "igniters 1-8" to the "igniter 1-8 inspection signal" for external inspection. Upon receiving the external "ignition control signal 1-8 (analog)" or the "ignition control signal 1-8 (communication control)" from the main control module, the "ignition power output" is connected to "igniters 1-8" to control the ignition. Upon receiving the "ignition protection control" signal, the ignition control module returns to its initial state.

[0038] The ignition control module converts the power supply input voltage into 5V through DC\DC to power the ignition module and power chip. The power chip converts the 5V voltage into 3.3V and 1.8V to power the MCU U1 and communication chip T1.

[0039] After being sorted according to the communication protocol, the signals are sent via "SCITXDA" to "DI" of communication chip T1. T1's "VCC" is connected to 3.3V as the power supply voltage. T1's "Z" and "Y" serve as the high and low terminals for 422 communication transmission, transmitting the 422 communication signal externally. T1's "A" and "B" serve as the high and low terminals for 422 communication reception, receiving the external 422 communication signal and sending it to "SCIRXDA" of the DSP via T1's "RO." The DSP evaluates the communication signal bytes. If it detects that "ignition control signal 1" is valid, it controls "GPIOA1" to output a high level, outputting "ignition control signal 1" externally. Similarly, "ignition control signal 2" through "ignition control signal 8" are sent.

[0040] When the ignition control module is in its initial state, the normally closed contacts K3-1, K3-2, K3-3, K4-1, K4-2, K4-3, K5-1, and K5-2 of the K3, K4, and K5 relays, respectively, connect "Ignitor 1+" through "Ignitor 8+" to "Ignitor 1-" through "Ignitor 8-" and the ignition power ground. This ensures that "Ignitor 1" through "Ignitor 8" are in a safe short-circuit state. When an ignition inspection or ignition is required, the ignition control module receives the external "Ignition Wire Release Protection Control+" and "Ignition Wire Release Protection Control-" signals, energizing the coils of group A of the K3, K4, and K5 relays. This activates the normally closed contacts, disconnecting "Ignitor 1+" through "Ignitor 8+" from "Ignitor 1-" through "Ignitor 8-" and the ignition power ground, and connecting the corresponding ignition inspection circuit. Take the igniter 1 and 2 inspection circuit as an example (the rest of the inspection principles are the same): the inspection signal enters the ignition control module through the "igniter 1, 2 inspection +", passes through the K3-1 contact (which is in the action state at this time) and enters the "igniter 1 +", passes through igniter 1 and then enters the "igniter 1-" of the ignition control module; the ignition control module short-circuits the "igniter 1-" and the "igniter 2-", and the signal then passes through igniter 2 and returns to the "igniter 2+" of the ignition control module, and then passes through the K3-2 contact and returns to the "igniter 1, 2 inspection-", completing the igniter 1 and 2 inspection. When the igniter needs to be ignited, take igniter 1 as an example (the rest of the inspection principles are the same): the "1in+" of the ignition module G2 is connected to the secondary power supply. When the "ignition control signal 1 (communication control)" given by the main control module is received, R1 and R2 are used to limit the current, C1 is used to store energy and then turn on the transistor Q1, and "1in-" is connected to the secondary power supply ground. The first channel of the ignition module G2 is turned on, "1out+" and "1out-" are closed and connected, and the "ignition power output" voltage is sent to "igniter 1+" after current limiting by R61; at the same time, "igniter 1-" is connected to the "ignition power ground", the "ignition power output" voltage is applied to igniter 1, and igniter 1 ignites. Optocoupler G1's "1in+" connects to ignition control signal 1+ (analog) and "1in-" connects to ignition control signal 1- (analog). When receiving the external "ignition control signal 1+ (analog)" and "ignition control signal 1- (analog)", optocoupler G1's first channel is connected, connecting ignition module G2's "1in-" to the secondary power ground. Ignition module G2's first channel is connected, closing "1out+" and "1out-" connections, and sending the "ignition power output" voltage to "igniter 1+" after current limiting by R61. Ignitor 1 then applies the "ignition power output" voltage, igniting the igniter. This implements both communication control and analog control of the igniter's ignition function.The ignition control module receives the "ignition wire protection control +" and "ignition wire protection control -" given from the outside, the B group coils of the K3, K4, and K5 relays are energized, the relays are reset, and the ignition control module returns to its initial state.

Claims

1. A dual-control ignition control device, characterized in that: It includes a power supply circuit, a main control circuit, and an ignition control circuit. The power supply circuit supplies power to the main control circuit and the ignition control circuit. The main control circuit is communicatively connected to the ignition control circuit and sends an ignition control signal to the ignition control circuit. The core of the main control circuit is the MCU. The MCU has multiple connections to multiple ignition control signal output terminals in the ignition control circuit, and each connection is connected to a digital signal output terminal and an analog signal output terminal.

2. The dual-control ignition control device according to claim 1, characterized in that: The digital signal output terminal is connected via an ignition module in an ignition control circuit.

3. The dual-control ignition control device according to claim 1, characterized in that: The analog signal output terminal is connected via an optocoupler circuit in the ignition control circuit.

4. The dual-control ignition control device according to claim 1, characterized in that: The ignition control circuit is connected to the input link of the main control circuit, and each path is controlled to be on and off by a triode circuit, and the rear stage of the triode circuit is connected to the digital signal output end and the analog signal output end.

5. The dual-control ignition control device according to claim 1, characterized in that: The main control circuit communicates with the outside world via RS422.

6. The dual-control ignition control device according to claim 1, characterized in that: The power supply circuit has a voltage regulator chip that outputs 5V voltage. The output of the voltage regulator chip is connected to the ignition module to provide voltage for the digital signal output end. The output of the voltage regulator chip is also connected to a power supply chip. The power supply chip outputs 3.3V and is connected to the main control circuit to power the MCU.

7. The dual-control ignition control device according to claim 1, characterized in that: The circuit of the digital signal output end in the ignition control circuit is connected to the igniter check contact through a switch.

8. The dual-control ignition control device according to claim 6, wherein: The power chip also outputs 1.8V and is connected to the main control circuit to provide power for the MCU in a low-power state.

9. The dual-control ignition control device according to claim 4, characterized in that: The triode circuit is connected in parallel with a capacitor and a resistor.

10. The dual-control ignition control device according to claim 1, wherein: The ignition control signal output terminal and the analog signal output terminal both have 8 channels.

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