An ignition device based on VITA74 connector

Abstract

An embodiment of the present invention discloses an ignition device based on a VITA74 connector, comprising an overload sensor circuit, an ignition device detection circuit, a delayed ignition control circuit, and an ignition control circuit; the overload sensor circuit comprises an acceleration sensor and a solid-state relay, which drives multiple sets of contacts of the solid-state relay to close when the acceleration of the ignition device reaches an overload value, so that the ignition voltage of the ignition battery is connected to the ignition device; the delayed ignition control circuit outputs a delayed ignition output in response to the contact closure of the solid-state relay to ignite a first ignition head; the ignition device detection circuit comprises six photoelectric couplers; the input end of each photoelectric coupler is respectively connected to the output end of each ignition device, for receiving the output signal of each ignition control circuit, and the output end of each photoelectric coupler is used to output a detection signal; the ignition control circuit is used to output two ignition pulses to ignite the second ignition head and the third ignition head.

Description

Technical Field

[0001] The present invention relates to an ignition device, and more particularly to an ignition device based on a VITA74 connector. Background Art

[0002] The ignition device is a key component in controlling engine startup. With the continuous advancement of science and technology, the ignition current demanded by the ignition device is increasing, while the weight and volume requirements are decreasing. This places higher demands on the ignition device for high current, miniaturization, and universality.

[0003] The current ignition device has the following disadvantages:

[0004] Incompatible: Currently, ignition devices generally use multiple connectors to input and output various signals, with different shapes and sizes, making them incompatible across models.

[0005] Large size: At present, ignition devices generally use electromagnetic relays for ignition control, which are too large to be miniaturized.

[0006] Poor resistance to shock current: At present, the ignition device uses electromagnetic relays, which have poor resistance to shock current.

[0007] Poor resistance to mechanical shock: At present, the ignition device uses electromagnetic relays and cannot withstand large-scale shock response spectrum tests. Summary of the Invention

[0008] An object of the present invention is to provide an ignition device based on a VITA74 connector to solve at least one of the problems existing in the prior art.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A first aspect of the present invention provides an ignition device based on a VITA74 connector, comprising:

[0011] Overload sensor circuit, ignition device detection circuit, delayed ignition control circuit and ignition control circuit;

[0012] The overload sensor circuit includes an acceleration sensor and a solid-state relay. The acceleration sensor is used to drive multiple sets of contacts of the solid-state relay to close when the acceleration of the ignition device reaches an overload value, so that the ignition voltage of the ignition battery is connected to the ignition device;

[0013] The delayed ignition control circuit ignites the first ignition head in response to the contact closure output of the solid state relay;

[0014] The ignition device detection circuit includes a first photocoupler, a second photocoupler, a third photocoupler, a fourth photocoupler, a fifth photocoupler, and a sixth photocoupler; the input end of each photocoupler is connected to the output end of each ignition control circuit through the corresponding contact of the solid-state relay in the overload sensing circuit; when the corresponding contact of the solid-state relay is closed, the ignition device detection circuit receives the output signal of each ignition control circuit, and the output end of each photocoupler is used to output a detection signal;

[0015] The ignition control circuit includes a first ignition control circuit and a second ignition control circuit, which are used to enable the second ignition generator and the third ignition generator to output ignition pulses to perform ignition operations on the second ignition head and the third ignition head in response to external instructions.

[0016] Optionally, in response to the solid relay contacts being attracted to form an input side circuit of the solid relay, a self-locking circuit of the overload sensor is formed.

[0017] Optionally, a self-test circuit is also included.

[0018] The self-test circuit includes an operational amplifier and a seventh photoelectric coupler, wherein the inverting terminal of the operational amplifier receives the detection signal output by the photoelectric coupler, the non-inverting terminal receives a reference voltage of 1V, and the output terminal is connected to the photoelectric coupler to output a self-test signal for detecting whether there is a relay output short circuit.

[0019] Optionally, the first ignition control circuit includes a first solid-state relay and a second solid-state relay, which are redundant with each other; the first solid-state relay and the second solid-state relay have input terminals receiving a first external control instruction, and output terminals connected to signal input terminals of a second ignition generator, respectively, and output ignition pulses in response to the second external control instruction;

[0020] The second ignition control circuit includes a third solid-state relay and a fourth solid-state relay, which are redundant with each other. The input ends of the third solid-state relay and the fourth solid-state relay receive the second external control instruction, and the output ends are respectively connected to the third ignition generator, and output ignition pulses in response to the second external control instruction.

[0021] Optionally, each output end of the ignition control circuit is connected to the signal input end of the second ignition generator and the third ignition generator through an ignition current limiting resistor.

[0022] Optionally, the ignition device further includes a power supply module for providing power supply voltage to each component.

[0023] Optionally, the power supply voltage, ignition voltage, detection signal, self-test signal and various output signals are transmitted through a VITA74 input and output connector.

[0024] Optionally, the delayed ignition control circuit includes a time delay relay, an input end of which is connected to the output end of the overload sensor, and an output end of which is connected to the signal input end of the first ignition generator.

[0025] Optionally, the delayed ignition control circuit further includes a fifth ignition current limiting resistor, and the output end of the time delay relay is connected to the signal input end of the first ignition generator through the fifth ignition current limiting resistor.

[0026] The beneficial effects of the present invention are as follows:

[0027] The ignition device provided by the present invention is provided with three ignition circuits, which realize multiple ignitions and enhance the reliability of the ignition circuit. An ignition device detection circuit 102 is provided. When ignition is abnormal, the voltage level of the detection signal can be used to determine which ignition relay has failed. At the same time, this embodiment uses a solid-state relay as the ignition relay, which enhances the seismic and impact resistance of the ignition device. In addition, all structures are arranged on an 85mm*70mm printed circuit board, which reduces the size of the entire ignition device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Figure 1 A schematic structural diagram of an ignition device based on a VITA74 connector provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the present invention, the present invention will be further described below in conjunction with the embodiments and drawings. Similar components in the drawings are represented by the same reference numerals. It should be understood by those skilled in the art that the following specific description is illustrative rather than restrictive and should not be used to limit the scope of protection of the present invention.

[0031] The present invention aims to address the challenges of miniaturization, high current, modularization, and universalization of ignition devices. The solid-state relays and VITA74 electrical connectors described in this invention can address these challenges to the greatest extent possible. Furthermore, the overload sensor circuit described in this invention provides a level of safety for aircraft, preventing casualties from misfires. The dual-redundancy design of the ignition circuit improves aircraft ignition reliability, preventing launch failures caused by ignition failure due to a single ignition circuit failure.

[0032] like Figure 1 As shown, an ignition device based on a VITA74 connector provided by the present invention includes:

[0033] Overload sensor circuit 101, ignition device detection circuit 102, delayed ignition control circuit 103 and ignition control circuit 104;

[0034] The overload sensor circuit 101 includes an acceleration sensor and a solid-state relay. The acceleration sensor is used to drive multiple sets of contacts of the solid-state relay to close when the acceleration of the ignition device reaches an overload value, so that the ignition voltage of the ignition battery is connected to the ignition device;

[0035] The delayed ignition control circuit 103 ignites the first ignition head in response to the contact closure output of the solid state relay;

[0036] The ignition control circuit 104 includes a first ignition control circuit and a second ignition control circuit, which are used to respond to external instructions to enable the second ignition generator and the third ignition generator to output ignition pulses to perform ignition operations on the second ignition head and the third ignition head;

[0037] The ignition device detection circuit 102 includes a first photocoupler, a second photocoupler, a third photocoupler, a fourth photocoupler, a fifth photocoupler, and a sixth photocoupler; the input end of each photocoupler is connected to the output end of each ignition control circuit through the corresponding contact of the solid-state relay in the overload sensing circuit. When the corresponding contact of the solid-state relay is closed, the ignition device detection circuit receives the output signal of each ignition control circuit, and the output end of each photocoupler is connected to the input and output connector for outputting the detection signal;

[0038] It should be noted that the above structure is arranged on a 85mm*70mm printed circuit board.

[0039] In this embodiment, three ignition circuits are provided, which realize multiple ignitions and enhance the reliability of the ignition circuit. An ignition device detection circuit 102 is provided. When ignition is abnormal, it can be determined which ignition relay has failed based on the voltage of the detection signal. At the same time, this embodiment uses a solid-state relay as the ignition relay, which enhances the seismic and impact resistance of the ignition device. In addition, all structures are arranged on an 85mm*70mm printed circuit board, which reduces the volume of the entire ignition device.

[0040] The ignition device provided in this embodiment has a built-in overload sensor. When the aircraft acceleration reaches the overload value of the overload sensor, the overload sensor is energized and the voltage of the ignition battery is connected to the ignition device; the overload sensor has a built-in relay self-locking circuit and can realize a power-off reset function.

[0041] It should be noted that the solid-state relay in this application is smaller in size than the magnetic latching relay, and has stronger overload and mechanical shock resistance than the magnetic latching relay.

[0042] In a specific embodiment, the solid-state relay includes four groups of contacts, which are respectively used to form a detection circuit, a self-locking circuit, output a self-test signal, and output an ignition voltage after the contacts are closed.

[0043] The principle behind the self-locking circuit is that the contacts corresponding to the self-locking circuit are connected in parallel to the solid-state relay's input-side circuit. Closing these contacts forms the solid-state relay's input-side circuit, thereby establishing the overload sensor's self-locking circuit. When the ignition system powers down and restarts, the solid-state relay's normally open contacts return to their original state, ensuring the overload sensor resets upon power-down and restart.

[0044] In this embodiment, the overload sensor circuit 101 adopts a relay self-locking circuit. When the overload sensor is energized, it will not be disconnected. After power failure and restart, the overload sensor can be reset, further ensuring the reliability of the ignition device.

[0045] In a specific embodiment, the ignition device also includes a self-test circuit 105, which includes an operational amplifier and a seventh photoelectric coupler. The inverting end of the operational amplifier receives the detection signal output by the photoelectric coupler, the non-inverting end receives a reference voltage of 1V, and the output end is connected to the photoelectric coupler for detecting whether there is a relay output short circuit.

[0046] The self-test circuit 105 in this embodiment is implemented with the help of a detection signal. The detection signal is connected to the inverting terminal of the operational amplifier, and the non-inverting terminal receives a reference voltage of 1V. When any ignition relay output is short-circuited, the detection signal will be higher than 1V, causing the operational amplifier to output a high level, and the high level drives the optocoupler to turn on, indicating that the self-test is normal.

[0047] The present application is provided with a self-test circuit 105, which can detect whether there is a relay output short circuit through a detection signal, thereby avoiding ignition failure caused by a fault and further improving the reliability of the ignition device.

[0048] In a specific embodiment, the first ignition control circuit includes a first solid-state relay and a second solid-state relay, which are redundant with each other; the first solid-state relay and the second solid-state relay receive a first external control instruction at their input terminals, and output terminals are respectively connected to a signal input terminal of the second ignition generator, and output ignition pulses in response to the second external control instruction;

[0049] The second ignition control circuit includes a third solid-state relay and a fourth solid-state relay, which are redundant with each other. The input ends of the third solid-state relay and the fourth solid-state relay receive the second external control instruction, and the output ends are respectively connected to the third ignition generator, and output ignition pulses in response to the second external control instruction.

[0050] The ignition control circuit provided in this embodiment receives an external command signal and performs ignition operations on two engines. It adopts a dual-redundancy design, which greatly enhances the reliability of the ignition circuit.

[0051] In a specific embodiment, each output terminal of the ignition control circuit 104 is connected to the signal input terminals of the second ignition generator and the third ignition generator through an ignition current limiting resistor.

[0052] In a specific embodiment, the ignition device further includes a power supply module for providing a power supply voltage to each component. Specifically, the power supply voltage is, for example, a 5V, 15W power supply.

[0053] In a specific embodiment, each output terminal of the ignition control circuit 104 is connected to the signal input terminals of the second ignition generator and the third ignition generator through an ignition current limiting resistor.

[0054] In a specific embodiment, the power supply voltage, ignition voltage, detection signal, self-test signal and various output signals are transmitted through a VITA74 connector.

[0055] In a specific embodiment, the input and output connectors are JVNX2-TF-S4X50-HS connectors that comply with the VITA74 standard.

[0056] In a specific embodiment, the delayed ignition control circuit 103 includes a time delay relay, an input end of which is connected to the output end of the overload sensor, and an output end of which is connected to the signal input end of the first ignition generator.

[0057] This embodiment is provided with a time delay relay. When the acceleration detected by the acceleration sensor built into the overload sensor reaches the overload value, the solid relay inside it is energized to connect the ignition voltage of the ignition battery, close the time delay relay and output the ignition voltage; after a delay period, the time delay relay is disconnected, thereby realizing the output of the engine delayed ignition pulse, wherein,

[0058] The ignition voltage of the ignition battery is 27V;

[0059] The delay mode of the delay relay is type 3: interval timing.

[0060] This embodiment realizes the engine delayed ignition function by providing a delay relay.

[0061] In a specific embodiment, the delayed ignition control circuit 103 further includes a fifth ignition current limiting resistor, and the output end of the time delay relay is connected to the signal input end of the first ignition generator through the fifth ignition current limiting resistor.

[0062] In a specific embodiment, the ignition device has a built-in first time delay relay and a second time delay relay, which serve as redundant backups for each other, thereby improving ignition reliability.

[0063] In a specific embodiment, the output end of the first time delay relay is connected to the signal input end of the first ignition generator through a fifth current limiting resistor; the output end of the second time delay relay is connected to the signal input end of the first ignition generator through a sixth current limiting resistor.

[0064] It should be noted that the current limiting resistor is used to protect the ignition circuit from generating a large current exceeding the design. The current limiting resistor will automatically melt after exceeding the rated current for 5s, thereby protecting the ignition battery from being burned.

[0065] It should be noted that each ignition circuit in the present application can generate a maximum surge current of thirty amperes. When the current in the ignition circuit is greater than thirty amperes for 5 seconds, the current limiting resistor automatically blows.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in this field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. An ignition device based on a VITA74 connector, characterized in that: include Overload sensor circuit, ignition device detection circuit, delayed ignition control circuit and ignition control circuit; The overload sensor circuit includes an acceleration sensor and a solid-state relay. The acceleration sensor is used to drive multiple sets of contacts of the solid-state relay to close when the acceleration of the ignition device reaches an overload value, so that the ignition voltage of the ignition battery is connected to the ignition device; The delayed ignition control circuit ignites the first ignition head in response to the contact closure output of the solid state relay; The ignition device detection circuit includes a first photocoupler, a second photocoupler, a third photocoupler, a fourth photocoupler, a fifth photocoupler, and a sixth photocoupler; the input end of each photocoupler is connected to the output end of each ignition control circuit through the corresponding contact of the solid-state relay in the overload sensor circuit; when the corresponding contact of the solid-state relay is closed, the ignition device detection circuit receives the output signal of each ignition control circuit, and the output end of each photocoupler is used to output a detection signal; The ignition control circuit includes a first ignition control circuit and a second ignition control circuit, which are used to enable the second ignition generator and the third ignition generator to output ignition pulses to perform ignition operations on the second ignition head and the third ignition head in response to external instructions.

2. The ignition device according to claim 1, characterized in that In response to the solid relay contacts being attracted, an input side circuit of the solid relay is formed, thereby forming a self-locking circuit of the overload sensor.

3. The ignition device according to claim 1, characterized in that Also includes self-test circuit, The self-test circuit includes an operational amplifier and a seventh photoelectric coupler, wherein the inverting terminal of the operational amplifier receives the detection signal output by the photoelectric coupler, the non-inverting terminal receives a reference voltage of 1V, and the output terminal is connected to the seventh photoelectric coupler to output a self-test signal for detecting whether there is a relay output short circuit.

4. The ignition device according to claim 3, characterized in that The first ignition control circuit includes a first solid-state relay and a second solid-state relay, which are redundant with each other; the first solid-state relay and the second solid-state relay have input terminals that receive a first external control instruction, and output terminals that are respectively connected to signal input terminals of a second ignition generator, and output ignition pulses in response to the second external control instruction; The second ignition control circuit includes a third solid-state relay and a fourth solid-state relay, which are redundant with each other. The input ends of the third solid-state relay and the fourth solid-state relay receive the second external control instruction, and the output ends are respectively connected to the third ignition generator, and output ignition pulses in response to the third external control instruction.

5. The ignition device according to claim 4, characterized in that: Each output end of the ignition control circuit is connected to the signal input end of the second ignition generator and the third ignition generator through an ignition current limiting resistor.

6. The ignition device according to claim 5, characterized in that: The ignition device further comprises a power supply module for providing power supply voltage to each component.

7. The ignition device according to claim 6, characterized in that The power supply voltage, ignition voltage, detection signal, self-test signal and various output signals are transmitted through the VITA74 input and output connector.

8. The ignition device according to claim 1, characterized in that The delayed ignition control circuit includes a time delay relay, an input end of which is connected to the output end of the overload sensor circuit, and an output end of which is connected to the signal input end of the first ignition generator.

9. The ignition device according to claim 8, characterized in that The delayed ignition control circuit further includes a fifth ignition current limiting resistor, and the output end of the time delay relay is connected to the signal input end of the first ignition generator through the fifth ignition current limiting resistor.

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