CN112506843A - Electrical interface for embedded software upgrading of generator controller - Google Patents
Electrical interface for embedded software upgrading of generator controller Download PDFInfo
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- CN112506843A CN112506843A CN202011506378.0A CN202011506378A CN112506843A CN 112506843 A CN112506843 A CN 112506843A CN 202011506378 A CN202011506378 A CN 202011506378A CN 112506843 A CN112506843 A CN 112506843A
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- electrical interface
- power supply
- circuit
- embedded software
- generator controller
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
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- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
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- Computer Security & Cryptography (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model belongs to aviation electrical design field, in particular to an electrical interface that is used for embedded software of generator control to upgrade, electrical interface is for maintaining electrical interface for one that increases on main electrical interface's basis, it includes to maintain electrical interface: the serial port signal is used for realizing serial port communication; a power supply signal comprising: the power supply voting circuit is used for voting power supply signals of a main electrical interface and a maintenance electrical interface of a product and outputting the power supply signals by the party with high input voltage; and the energy storage circuit comprises an energy storage capacitor connected in parallel behind the power supply voting circuit and is used for stabilizing the charging voltage. The invention adds a double electrical interface of the software maintenance electrical interface on the basis of the original electrical interface. The backup power supply interface and the serial interface are provided, and the safety and the maintenance guarantee of in-situ upgrading of embedded software of products on the computer are improved by designing a power supply voting circuit, a surge suppression circuit and an energy storage circuit.
Description
Technical Field
The application belongs to the field of aviation electrical design, and particularly relates to an electrical interface for upgrading embedded software of a generator controller.
Background
At present, a generator controller in an onboard power system is a Digital controller with a Digital Signal processing Device (DSP) as a core, and the control, protection, fault isolation and communication functions of the onboard power system are implemented by embedded software. The traditional embedded software upgrading mode is that the embedded software of the generator controller is upgraded by opening a product case and utilizing a JTAG port to burn software of a DSP, and particularly after the generator controller is installed, the embedded software of the controller on an airplane needs to be upgraded by detaching the generator controller and opening the product case to upgrade the software. The upgrading mode is time-consuming and labor-consuming, and the maintenance and guarantee of the outfield are poor. Aiming at the problems, the main technical scheme is a generator controller embedded software in-situ upgrading method based on a communication serial port, namely, the generator controller does not need to be dislocated on the machine, a 28V power supply is provided for a product on the machine, then an upper computer is upgraded by software, a software code to be upgraded is issued through serial port communication, and after a DSP successfully receives a data file of the software code to be upgraded, the software programming and checking work is completed by calling a Flash API operation function. In addition, part of airplanes do not have on-board online loading capacity, the electric connector of the original electric interface needs to be plugged and pulled out, the in-situ upgrading electric connector is manufactured again, and the maintenance guarantee is poor.
Disclosure of Invention
The invention provides a novel electrical interface design method based on an electrical interface of a generator controller, aiming at the problems of safety and maintainability existing in the in-situ upgrade of on-board products, namely, a double electrical interface of a software maintenance electrical interface is added on the basis of the original electrical interface. The backup power supply interface and the serial interface are provided, and the safety and the maintenance guarantee of in-situ upgrading of embedded software of products on the computer are improved by designing a power supply voting circuit, a surge suppression circuit and an energy storage circuit.
This application is used for the electric interface of the embedded software upgrading of generator controller, electric interface is for maintaining electric interface for one that increases on main electric interface's basis, it includes to maintain electric interface:
the serial port signal is used for realizing serial port communication;
a power supply signal comprising:
a power supply voting circuit for supplying a main electrical interface and a maintenance electrical interface of a product
Voting the electric signals, and outputting the electric signals by the side with higher input voltage;
a storage circuit including a storage capacitor connected in parallel after the power supply voting circuit
Stabilizing the charging voltage;
and the output detection circuit outputs a 5V signal of the product and is used for detecting whether the internal working voltage of the product is normal or not.
Preferably, the serial port signals comprise four signals of RS422R-, RS422R +, RS422T-, RS422T + and the like.
Preferably, the power supply signal is used to realize a 28V power supply.
Preferably, a lightning protection circuit is further arranged before the power supply signal enters the power supply voting circuit, and a voltage transient suppression diode and a filter capacitor are arranged in the lightning protection circuit.
Preferably, the power supply signal is further provided with an anti-surge filtering power supply module before entering the power supply voting circuit.
Preferably, a resistor R3 connected in series with the energy storage capacitor is further disposed on the charging loop of the energy storage circuit, so as to implement slow charging.
Preferably, a diode V6 is connected in parallel to both ends of the resistor R3 to form a discharge circuit.
The invention provides a novel electrical interface design method based on an electrical interface of a generator controller, aiming at the problems of safety and maintainability existing in the in-situ upgrade of on-board products, namely, a double electrical interface of a software maintenance electrical interface is added on the basis of the original electrical interface. The backup power supply interface and the serial interface are provided, and the safety and the maintenance guarantee of in-situ upgrading of embedded software of products on the computer are improved by designing a power supply voting circuit, a surge suppression circuit and an energy storage circuit.
Drawings
FIG. 1 is a schematic diagram of the electrical interface signal definition of the present application.
FIG. 2 is a functional block diagram of a lightning protection circuit for maintaining electrical interface signals according to the present application.
Fig. 3 is a functional block diagram of the 28V power supply signal anti-surge filtering, power supply voting and tank circuit of the present application.
For the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; further, the drawings are for illustrative purposes, and terms describing positional relationships are limited to illustrative illustrations only and are not to be construed as limiting the patent.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application.
Further, it is noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are used in the description of the invention in a generic sense, e.g., connected as either a fixed connection or a removable connection or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements, and those skilled in the art can understand their specific meaning in this application according to the specific situation.
The design concept of the invention is based on the signal definition of the electric interface of the generator controller at present, and the small-sized electric interface is added in the generator control case, so that the electric interface only provides the software upgrading and maintenance functions, and the voltage surge suppression, the product lightning protection, the power supply compatibility and the safety design are fully considered. The maintenance interface signal definition comprises an RS-422A serial port, a 28V power supply signal and a 5V voltage detection signal. The signal definition and effect are as follows:
1) RS-422A serial port signals comprise four signals of RS422R-, RS422R +, RS422T-, RS422T + and are used for realizing the serial port communication function;
2) a 28V supply signal, BAK _28V maintenance 28V +, SGND supply ground signal;
3) and 5V voltage monitoring signals are used for outputting 5V signals of the product and detecting whether the internal working voltage of the product is normal or not.
4) And shielding the ground signal, and shielding the ground signal by the product case.
In the invention, the maintenance interface is additionally provided with a lightning protection circuit, an anti-surge suppression module, a voting circuit and an energy storage circuit in the product. In order to solve the defect of weak indirect lightning protection capability of a generator controller of an aviation power supply system, a lightning protection filtering design is carried out on signals of a maintenance interface, a transient suppression diode is added, the environmental adaptability of a product is improved, lightning protection energy is absorbed and discharged at the inlet of each signal of an electrical interface in the product, the purpose of lightning protection is achieved, and the lightning protection capability of the product is improved. And the 28V power supply signal of the maintenance interface is simultaneously subjected to anti-surge and filtering functions through the anti-surge filtering circuit module, so that the circuit design is simplified, and the system reliability is enhanced.
The power supply voting circuit votes 28V power supply signals of a main electrical interface and a maintenance interface of a product, namely when the main electrical interface and the maintenance are both in a connection state, the voting circuit votes that the output of the 28V power supply voltage at the rear end is determined by the party with high input voltage. In addition, the power supply voting circuit can prevent the situation that when one path is connected, the 28V power supply is connected, and the other path is not connected, the backflow of signals causes damage to other equipment on the machine.
After the power supply voting circuit, an energy storage circuit is designed to solve the problems of poor output quality and voltage fluctuation of a 28V power supply used by a maintenance interface when a generator controller is upgraded on the machine in situ. The voted circuit end is connected with a slow charging and fast discharging circuit of a large-capacity energy storage capacitor in parallel, the large-capacity energy storage capacitor guarantees the charging voltage of the large-capacity energy storage capacitor, the series resistance of a charging loop realizes the slow charging effect, and diodes are connected in parallel at the two ends of the resistance to form a discharging loop with the capacitor, so that the purpose of fast discharging is achieved. The voltage of the back-end circuit is filtered, so that the stability of the internal power supply voltage of a product is ensured, and about 50ms power-off protection can be provided.
The 5V output detection signal is a 5V power supply signal for supplying power to each integrated circuit on the controller digital signal processing assembly after 28V voltage in a product passes through the DC/DC module, and is output through the maintenance plug. The monitoring of the power supply state inside the product can be realized by utilizing external monitoring equipment (such as an oscilloscope) on the product maintenance electrical interface.
Wherein, fig. 1 is the definition of the maintenance electrical interface signal, fig. 2 is the lightning protection circuit schematic block diagram of the maintenance electrical interface signal, the BACK _28V signal of the maintenance electrical interface is the 28V power supply signal, V12 is the voltage transient suppression diode, and C2 and C3 are the filter capacitors.
In fig. 3, U1 is an integrated anti-surge filtering power supply module, V2 and V3 form a 28V power supply voting circuit, L5 is a filtering inductor, and C15, C16 and C41 are filtering capacitors. V5 is a zener diode. V7 is a rectifying diode. And C13 is a large-capacity energy storage capacitor. The circuit end after voting is connected with the slow charging and fast discharging circuit of the capacitor in parallel, C13 is a large-capacity energy storage capacitor, the charging voltage of the capacitor is guaranteed, R3 is the series resistance of a C13 charging loop, the slow charging effect is achieved, a diode V6 is connected in parallel at the two ends of R3, and the capacitor forms a discharging loop, so that the fast discharging purpose is achieved, the voltage stability of a power supply signal provided by a maintenance interface for a generator controller is guaranteed, and the lightning protection and voltage drop prevention functions are achieved. The safety of the maintenance interface on the product and the machine is effectively ensured.
The invention provides a novel electrical interface design method based on an electrical interface of a generator controller, aiming at the problems of safety and maintainability existing in the in-situ upgrade of on-board products, namely, a double electrical interface of a software maintenance electrical interface is added on the basis of the original electrical interface. The backup power supply interface and the serial interface are provided, and the safety and the maintenance guarantee of in-situ upgrading of embedded software of products on the computer are improved by designing a power supply voting circuit, a surge suppression circuit and an energy storage circuit.
On the basis of an independent electrical interface of an original generator controller, a maintenance electrical interface is additionally arranged, and an R-422A serial port signal, a 28V power supply signal and a 5V output detection circuit are arranged according to the in-situ upgrading requirement of embedded software of the generator controller. The design can realize the in-situ upgrade of embedded software of the generator controller on the machine, does not need full-machine power supply, does not need to plug the original main electrical connector, can only utilize self-provided direct current power supply to supply power through the maintenance electrical interface, is connected with a software upgrading upper computer, can realize the embedded software upgrade of the product, and has high upgrade safety and reliability and good guarantee maintainability.
Having thus described the present application in connection with the preferred embodiments illustrated in the accompanying drawings, it will be understood by those skilled in the art that the scope of the present application is not limited to those specific embodiments, and that equivalent modifications or substitutions of related technical features may be made by those skilled in the art without departing from the principle of the present application, and those modifications or substitutions will fall within the scope of the present application.
Claims (7)
1. An electrical interface for embedded software upgrade of a generator controller, wherein the electrical interface is a maintenance electrical interface added on the basis of a main electrical interface, the maintenance electrical interface comprising:
the serial port signal is used for realizing serial port communication;
a power supply signal comprising:
the power supply voting circuit is used for voting power supply signals of a main electrical interface and a maintenance electrical interface of a product and outputting the power supply signals by the party with high input voltage;
the energy storage circuit comprises an energy storage capacitor connected in parallel behind the power supply voting circuit and is used for stabilizing the charging voltage;
and the output detection circuit outputs a 5V signal of the product and is used for detecting whether the internal working voltage of the product is normal or not.
2. The electrical interface for generator controller embedded software upgrades of claim 1, in which:
the serial port signals comprise four signals of RS422R-, RS422R +, RS422T-, RS422T + and the like.
3. The electrical interface for generator controller embedded software upgrades of claim 1, in which:
the power supply signal is used for realizing 28V power supply.
4. The electrical interface for generator controller embedded software upgrades of claim 1, in which:
and a lightning protection circuit is also arranged before the power supply signal enters the power supply voting circuit, and a voltage transient suppression diode and a filter capacitor are arranged in the lightning protection circuit.
5. The electrical interface for generator controller embedded software upgrades of claim 1, in which:
and the power supply signal is also provided with an anti-surge filtering power supply module before entering the power supply voting circuit.
6. The electrical interface for generator controller embedded software upgrades of claim 1, in which:
and a resistor R3 connected with the energy storage capacitor in series is further arranged on a charging loop of the energy storage circuit and used for realizing slow charging.
7. The electrical interface for generator controller embedded software upgrades of claim 6, in which: and a diode V6 is connected in parallel with two ends of the resistor R3 to form a discharge loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011506378.0A CN112506843B (en) | 2020-12-18 | 2020-12-18 | Electric interface for embedded software upgrade of generator controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011506378.0A CN112506843B (en) | 2020-12-18 | 2020-12-18 | Electric interface for embedded software upgrade of generator controller |
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| Publication Number | Publication Date |
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| CN112506843A true CN112506843A (en) | 2021-03-16 |
| CN112506843B CN112506843B (en) | 2023-05-05 |
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| CN202011506378.0A Active CN112506843B (en) | 2020-12-18 | 2020-12-18 | Electric interface for embedded software upgrade of generator controller |
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Citations (7)
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2020
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| CN202772567U (en) * | 2012-09-11 | 2013-03-06 | 成都新欣神风电子科技有限公司 | Global function airplane power supply characteristic protective device |
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| CN202997685U (en) * | 2012-12-07 | 2013-06-12 | 陕西千山航空电子有限责任公司 | A backup power source soft switch-on circuit |
| US20140306714A1 (en) * | 2013-04-10 | 2014-10-16 | Hamilton Sundstrand Corporation | Transient voltage suppression protection circuit including built in testing |
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