Ignition voltage test system and method based on built-in self-detection

Abstract

The invention provides an ignition voltage test system and method based on built-in self-detection. The ignition voltage test system comprises a power supply conversion board 1, an ignition voltage acquisition board 2, a core processing board 3, an external ignition power supply 4, a direct-current power supply 5 and a control computer 6, the power conversion board 1, the ignition voltage acquisition board 2 and the core processing board 3 are stacked and interconnected; the external ignition power supply 4 is connected with the ignition voltage acquisition board 2; the direct-current power supply 5 is connected with the power conversion board 1; and the control computer 6 is connected with the power conversion board 1, the ignition voltage acquisition board 2 and the core processing board 3. According to the invention, built-in self-detection of the ignition voltage is realized, remote testing of the ignition voltage can be realized in combination with means such as remote measurement, and the method has important significance for improving the aircraft testing efficiency, ensuring the flight test success of the aircraft, analyzing test data and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft electrical systems, and in particular to an ignition voltage testing method based on in-machine self-detection. Background Art

[0002] The ignition of pyrotechnics is an important part of the electrical system of the aircraft. The ignition of pyrotechnics is related to the execution of key actions such as the start of the aircraft engine, the activation of the thermal battery, and the separation of the interstage, which directly affects the success or failure of the aircraft mission. The ignition of pyrotechnics on the aircraft generally adopts the electric ignition method, that is, the ignition energy is used to output a voltage pulse of a certain voltage and a certain duration, which acts on the pyrotechnic end to cause physical or chemical changes, so as to promote the effective ignition of the pyrotechnics. For the ignition of pyrotechnics, it is crucial whether the electrical system can provide an ignition stimulus that meets the requirements. Usually, when conducting ground tests on aircraft, the ignition voltage can be collected and judged by using an external analog-to-digital conversion acquisition card combined with the upper computer display software. By comparing the collected voltage peak and duration with the preset threshold, it is judged whether the ignition action is performed normally. This method requires the reliance on external complex external test equipment, which hinders the realization of the aircraft's agile test function. In addition, once the aircraft is launched, it is impossible to collect the relevant ignition voltage with the help of external equipment, which brings many inconveniences to the collection and analysis of flight test data.

[0003] The present invention proposes an ignition voltage test method based on built-in self-detection, which realizes the built-in self-detection of the ignition voltage by building-in path sorting, signal conditioning, analog-to-digital conversion, data processing and external communication circuits in the ignition circuit, and can realize remote testing of the ignition voltage by combining telemetry and other means, which is of great significance for improving the efficiency of aircraft testing, ensuring the success of aircraft flight tests and analyzing test data. Summary of the invention

[0004] In view of the defects in the prior art, an object of the present invention is to provide an ignition voltage test system and method based on built-in self-detection.

[0005] According to the present invention, an ignition voltage test system based on internal self-detection includes: a power conversion board 1, an ignition voltage acquisition board 2, a core processing board 3, an external ignition power supply 4, a DC power supply 5 and a control computer 6;

[0006] The power conversion board 1, the ignition voltage acquisition board 2 and the core processing board 3 are stacked and interconnected;

[0007] The external ignition power supply 4 is connected to the ignition voltage acquisition board 2;

[0008] The DC power supply 5 is connected to the power conversion board 1;

[0009] The control computer 6 is connected to the power conversion board 1 , the ignition voltage acquisition board 2 and the core processing board 3 .

[0010] Preferably, the external ignition power supply 4 is connected to the ignition voltage acquisition board 2 via a cable.

[0011] Preferably, the power conversion board 1, the ignition voltage acquisition board 2 and the core processing board 3 are stacked and interconnected via board connectors.

[0012] Preferably, the external ignition power supply 4 is used to provide the original sampling signal for the ignition voltage acquisition board 2;

[0013] The DC power supply 5 is used to provide primary power to the power conversion board 1;

[0014] The power conversion board 1 is used to convert the primary power into a secondary power, and to supply power to the power conversion board 1, the ignition voltage acquisition board 2 and the core processing board 3 based on the secondary power;

[0015] The ignition voltage acquisition board 2 is used to realize the selection of the ignition path, signal conditioning and analog-to-digital conversion;

[0016] The core processing board 3 is used to perform cumulative noise reduction processing on the quantized voltage digital quantity, and perform level conversion on the voltage digital quantity after the noise reduction processing, and then transmit it to the external device through the digital bus;

[0017] The control computer 6 is used to issue ignition commands and display ignition voltage.

[0018] Preferably, the power conversion board 1 comprises: an input filter circuit, a DC-DC conversion circuit and an output filter circuit;

[0019] The input filter circuit is used to filter the primary power supply;

[0020] The DC-DC conversion circuit is used to convert the primary power supply into the secondary power supply;

[0021] The output filter circuit is used to filter the secondary power supply.

[0022] Preferably, the ignition voltage acquisition board 2 comprises: a multi-way analog switch, a voltage divider circuit, a signal conditioning circuit and an analog-to-digital conversion circuit; and the multi-way analog switch, the voltage divider circuit, the signal conditioning circuit and the analog-to-digital conversion circuit are connected in series;

[0023] The multi-channel analog switch is used for collecting and switching different ignition circuits, and each ignition circuit shares the voltage divider circuit, signal conditioning circuit and analog-to-digital conversion circuit;

[0024] The voltage divider circuit is used to convert the higher ignition voltage into an analog quantity that can be collected by AD;

[0025] The signal conditioning circuit is used to perform amplification, filtering and noise reduction on the analog signal;

[0026] The analog-to-digital conversion circuit is used to convert the analog signal after signal conditioning into a digital signal.

[0027] Preferably, the core processing board 3 includes an FPGA core circuit and an interface processing circuit;

[0028] The FPGA core circuit is used to perform cumulative noise reduction processing on the quantized voltage digital quantity to obtain a processed voltage digital quantity;

[0029] The interface processing circuit is used to perform level conversion on the processed voltage digital quantity and transmit it to an external device through a digital bus.

[0030] According to the present invention, an ignition voltage test method based on built-in self-detection is provided, characterized in that the above-mentioned ignition voltage test system based on built-in self-detection performs the following steps:

[0031] Step S1: Turn on the DC power supply 5 to transmit power to the power conversion board 1, and the power conversion board 1 generates secondary power required by each circuit board;

[0032] Step S2: starting the ignition voltage acquisition board 2 and the core processing board 3, and making the ignition voltage acquisition board 2 and the core processing board 3 enter a standby state;

[0033] Step S3: connecting the external ignition power supply 4, the core processing board 3 receives the external ignition instruction, and uses the FPGA core circuit in the core processing board 3 to parse the ignition instruction to obtain an ignition enable signal;

[0034] Step S4: according to the ignition enable signal obtained by analysis, the multi-way analog switch is controlled to switch to the ignition circuit to introduce the ignition voltage into the ignition voltage acquisition board 2;

[0035] Step S5: the ignition voltage acquisition board 2 performs voltage division, signal conditioning and analog-to-digital conversion on the input voltage signal to form a digital signal;

[0036] Step S6: Send the voltage digital signal to the FPGA core processing circuit in the core processing board 3, perform cumulative noise reduction processing through the FPGA core processing circuit, then perform level conversion through the interface processing circuit in the core processing board 3, and transmit it to the control computer through the digital bus.

[0037] Preferably, step S5 comprises:

[0038] Step S5.1: the ignition voltage acquisition board 2 divides the input voltage signal to meet the device voltage acquisition range requirements;

[0039] Step S5.2: amplifying the divided signal through an isolation amplifier and performing low-pass filtering signal conditioning;

[0040] Step S5.3: The conditioned signal is converted into a digital signal by an AD converter.

[0041] Preferably, the control computer uses direct reception and display or telemetry transmission to implement rapid testing of ignition voltage in different scenarios.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] The traditional aircraft ignition voltage test uses an external voltage acquisition card to collect and convert analog signals, and uploads them to the host computer using various buses such as PCI for solution and display. This method requires a lot of equipment, a complex system, and high cost, and does not have the ability to monitor the ignition voltage in real time during the flight of the aircraft. Compared with the traditional test method, the test system and method proposed in the present invention obtains an accurate ignition voltage value by building an acquisition circuit in the ignition circuit and using core processors such as FPGA to reduce noise on the signal. It can be combined with wireless communications such as telemetry to achieve remote testing and interpretation, and has the characteristics of simple system, easy operation, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0045] Figure 1 Composition diagram of the ignition voltage test method based on in-machine self-detection provided by the present invention;

[0046] Figure 2 The FPGA information processing and logic control composition block diagram provided by the present invention;

[0047] Figure 3 The present invention provides a working flow chart of an ignition voltage test method based on in-machine self-detection;

[0048] Among them, 1-power conversion board; 2-ignition voltage acquisition board; 3-core processing board; 4-external ignition power supply; 5-DC power supply; 6-control computer. DETAILED DESCRIPTION

[0049] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0050] Example 1

[0051] According to the present invention, an ignition voltage test system based on built-in self-detection is provided. Figure 1 As shown, it is a system consisting of three circuit boards built into the ignition control device, an external power supply, and a control host computer; including:

[0052] Power conversion board 1, ignition voltage acquisition board 2, core processing board 3, external ignition power supply 4, DC power supply 5 and control computer 6;

[0053] The power conversion board 1, the ignition voltage acquisition board 2 and the core processing board 3 are stacked and interconnected through inter-board connectors to achieve mutual transmission of power and analog digital signals;

[0054] The external ignition power supply 4 is connected to the ignition voltage acquisition board 2 via a cable to provide energy input for the ignition circuit, that is, to provide the original sampling signal for the acquisition circuit;

[0055] The DC power supply 5 is connected to the power conversion board 1 to provide primary power to the power conversion board 1, and then supplies power to each circuit board after power conversion;

[0056] The control computer 6 is connected to the power conversion board 1, the ignition voltage acquisition board 2 and the core processing board 3;

[0057] The control computer 6 implements the issuance of ignition commands and the display of ignition voltage.

[0058] Specifically, the power conversion board 1 includes an input filter circuit, a DC-DC conversion circuit and an output filter circuit, which realize functions such as input filtering of the primary power supply, conversion of each secondary power supply and output filtering, provide power for each circuit board, and can use a test power supply to achieve power conversion during ground testing of the aircraft. It can use a thermal battery or battery input to achieve power conversion during the flight of the aircraft.

[0059] Specifically, the ignition voltage acquisition board 2 includes a multi-channel analog switch, a voltage divider circuit, a signal conditioning circuit, and an analog-to-digital conversion circuit connected in series. Each ignition circuit shares the voltage divider circuit, the signal conditioning circuit, and the analog-to-digital conversion circuit. The acquisition and switching of different ignition circuits are realized by controlling the multi-channel analog switch. The circuit mainly realizes the selection of the ignition path, the filtering, conditioning, and noise reduction of the signal, converts the higher ignition voltage into an analog quantity that can be collected by AD, and after being converted into a digital quantity, it is sent to the core processing board 3, which can be integrated into the aircraft ignition execution circuit to realize the integrated design of ignition execution and acquisition, and realize the in-machine self-detection in a limited space.

[0060] Specifically, the core processing board 3 includes an FPGA core circuit and an interface processing circuit, which mainly performs cumulative noise reduction processing on the quantized voltage digital quantity, and sends it to an external device through a digital bus after being processed by the interface processing circuit. The interface processing circuit mainly performs level conversion to realize bus transmission. This part of the circuit can be integrated with the ignition control circuit during the actual design of the aircraft, and can also be realized by the onboard computer circuit. It has a certain flexibility and meets the needs of different types of circuit designs for aircraft.

[0061] Specifically, Figure 2 As shown, the FPGA core circuit includes an enable control module, a bus communication module, and an AD sampling and storage module. The bus communication module is responsible for receiving and parsing the instruction information from the control computer, thereby outputting the instruction to the enable control module, controlling the ignition circuit to be turned on, and switching the multi-channel analog switch to the circuit to realize the collection of the ignition voltage; the AD sampling and storage module outputs the AD sampling clock to control the sampling of AD, and sends the sampled data to the bus communication module after accumulating and reducing noise to send it to the control computer; the DCM clock management module realizes the frequency division of the external input clock for use by the enable control module, the bus communication module, and the AD sampling and storage module.

[0062] Specifically, the external ignition power supply 4 mainly provides an ignition input for the ignition voltage acquisition circuit, which is converted into a digital quantity after acquisition and conditioning and sent to the outside.

[0063] Specifically, the DC power supply 5 provides a primary power input for the power conversion circuit, which is converted into a secondary power used by various components in the circuit through the power conversion circuit.

[0064] According to the present invention, a method for testing ignition voltage based on built-in self-detection is provided. Figure 3 As shown, including:

[0065] The DC power supply is turned on to transmit power to the power conversion board, which generates the secondary power required by each circuit board, and each circuit board starts and enters the standby state; the ignition power supply is connected, the core processing board receives the external ignition command, the FPGA core circuit analyzes its command and outputs the ignition enable signal, and switches the multi-way analog switch in the circuit to the ignition loop according to the ignition enable signal obtained by the analysis to introduce the ignition voltage to the ignition voltage acquisition board; the ignition voltage acquisition board first divides the input voltage signal, and its voltage dividing resistor is 1M and 49M, ensuring that the voltage dividing ratio is 1:50, so that the voltage signal with an amplitude of 100V is divided to a maximum of 2V, so that it meets the voltage acquisition range requirements of the device; after the voltage division processing, the signal is amplified by the isolation amplifier and sent to the AD analog-to-digital converter after signal conditioning such as low-pass filtering to form a 12-bit digital signal that can be processed; the voltage digital signal is sent to the FPGA, and after sampling and accumulation processing, it is sent to the control computer by the FPGA via the bus. At this point, the workflow is completed, and the control computer can use direct reception and display or telemetry transmission to implement rapid testing of ignition voltage in different scenarios.

[0066] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0067] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An ignition voltage test system based on built-in self-detection, characterized in that: include: A power conversion board (1), an ignition voltage acquisition board (2), a core processing board (3), an external ignition power supply (4), a direct current power supply (5) and a control computer (6); The power conversion board (1), the ignition voltage acquisition board (2) and the core processing board (3) are stacked and interconnected; The external ignition power supply (4) is connected to the ignition voltage collection board (2); The DC power supply (5) is connected to the power conversion board (1); The control computer (6) is connected to the power conversion board (1), the ignition voltage acquisition board (2) and the core processing board (3).

2. The ignition voltage test system based on built-in self-detection according to claim 1, characterized in that: The external ignition power supply (4) is connected to the ignition voltage collection board (2) via a cable.

3. The ignition voltage test system based on built-in self-detection according to claim 1, characterized in that: The power conversion board (1), the ignition voltage collection board (2) and the core processing board (3) are stacked and interconnected via a board connector.

4. The ignition voltage test system based on built-in self-detection according to claim 1, characterized in that: The external ignition power supply (4) is used to provide an original sampling signal for the ignition voltage acquisition board (2); The DC power supply (5) is used to provide primary power to the power conversion board (1); The power conversion board (1) is used to convert a primary power supply into a secondary power supply, and to supply power to the power conversion board (1), the ignition voltage acquisition board (2) and the core processing board (3) based on the secondary power supply; The ignition voltage acquisition board (2) is used to realize the selection of the ignition path, signal conditioning and analog-to-digital conversion; The core processing board (3) is used to perform cumulative noise reduction processing on the quantized voltage digital quantity, perform level conversion on the voltage digital quantity after the noise reduction processing, and then transmit it to the external device through the digital bus; The control computer (6) is used to issue ignition instructions and display ignition voltage.

5. The ignition voltage test system based on built-in self-detection according to claim 1, characterized in that: The power conversion board (1) comprises: an input filter circuit, a DC-DC conversion circuit and an output filter circuit; The input filter circuit is used to filter the primary power supply; The DC-DC conversion circuit is used to convert the primary power supply into the secondary power supply; The output filter circuit is used to filter the secondary power supply.

6. The ignition voltage test system based on built-in self-detection according to claim 1, characterized in that: The ignition voltage acquisition board (2) comprises: a multi-channel analog switch, a voltage divider circuit, a signal conditioning circuit and an analog-to-digital conversion circuit; and the multi-channel analog switch, the voltage divider circuit, the signal conditioning circuit and the analog-to-digital conversion circuit are connected in series; The multi-channel analog switch is used for collecting and switching different ignition circuits, and each ignition circuit shares the voltage divider circuit, signal conditioning circuit and analog-to-digital conversion circuit; The voltage divider circuit is used to convert the higher ignition voltage into an analog quantity that can be collected by AD; The signal conditioning circuit is used to perform amplification, filtering and noise reduction on the analog signal; The analog-to-digital conversion circuit is used to convert the analog signal after signal conditioning into a digital signal.

7. The ignition voltage test system based on built-in self-detection according to claim 1, characterized in that: The core processing board (3) comprises an FPGA core circuit and an interface processing circuit; The FPGA core circuit is used to perform cumulative noise reduction processing on the quantized voltage digital quantity to obtain a processed voltage digital quantity; The interface processing circuit is used to perform level conversion on the processed voltage digital quantity and transmit it to an external device through a digital bus.

8. An ignition voltage test method based on built-in self-detection, characterized in that: The ignition voltage test system based on built-in self-detection according to any one of claims 1 to 7 is used to perform the following steps: Step S1: turning on the DC power supply (5) to transmit power to the power conversion board (1), and the power conversion board (1) generates secondary power required by each circuit board; Step S2: starting the ignition voltage acquisition board (2) and the core processing board (3), and making the ignition voltage acquisition board (2) and the core processing board (3) enter a standby state; Step S3: connecting the external ignition power supply (4), the core processing board (3) receives the external ignition instruction, and uses the FPGA core circuit in the core processing board (3) to analyze the ignition instruction to obtain an ignition enable signal; Step S4: according to the ignition enable signal obtained by analysis, the multi-way analog switch is controlled to switch to the ignition circuit to introduce the ignition voltage into the ignition voltage acquisition board (2); Step S5: the ignition voltage acquisition board (2) performs voltage division, signal conditioning and analog-to-digital conversion on the input voltage signal to form a digital signal; Step S6: Send the voltage digital signal to the FPGA core processing circuit in the core processing board (3), perform cumulative noise reduction processing through the FPGA core processing circuit, perform level conversion through the interface processing circuit in the core processing board (3), and transmit it to the control computer through the digital bus.

9. The ignition voltage test method based on built-in self-detection according to claim 8, characterized in that: The step S5 comprises: Step S5.1: the ignition voltage acquisition board (2) divides the input voltage signal to meet the device voltage acquisition range requirements; Step S5.2: amplifying the divided signal through an isolation amplifier and performing low-pass filtering signal conditioning; Step S5.3: The conditioned signal is converted into a digital signal by an AD converter.

10. The ignition voltage test method based on built-in self-detection according to claim 8, characterized in that: The control computer realizes the rapid test of ignition voltage in different scenarios by directly receiving and displaying or telemetry sending.

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