CN111258241A - Wireless transmission startup and shutdown control device for aircraft data recording equipment - Google Patents
Wireless transmission startup and shutdown control device for aircraft data recording equipment Download PDFInfo
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- CN111258241A CN111258241A CN201811463032.XA CN201811463032A CN111258241A CN 111258241 A CN111258241 A CN 111258241A CN 201811463032 A CN201811463032 A CN 201811463032A CN 111258241 A CN111258241 A CN 111258241A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21119—Circuit for signal adaption, voltage level shift, filter noise
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Abstract
A wireless transmission on-off control device for aircraft data recording equipment is characterized by comprising a switching value detection circuit and a logic selection circuit; the switching value detection circuit is used for detecting flight state signals and outputting high and low level detection results; the logic selection circuit identifies the flight state and the cabin door state according to whether the high-low level detection result of the flight state signal is communicated with the corresponding polarity selection interface or not, and controls the wireless transmission on-off. The invention can flexibly select the polarity of the flight signal, adapt to different types of aircrafts, automatically identify the flight state of the aircrafts, cut off the power of the wireless transmission module to stop working in the flight process, avoid the radio frequency signal from radiating outwards, and electrify the wireless transmission module to work after landing. The invention ensures that the wireless module is in a power-off state in the flight process of the aircraft, avoids the influence of the radio frequency signal radiated outwards on the flight safety, automatically identifies the flight state and ensures that the wireless data transmission conforms to the working logic allowed by the flight safety.
Description
Technical Field
The invention belongs to the field of aviation data recording, and particularly relates to a wireless transmission startup and shutdown control device for aircraft data recording equipment.
Background
In the running process of an aircraft, the recorded flight data can be used for accident investigation and safe daily supervision, the flight data can be acquired in time, wireless data transmission can become a convenient means for acquiring the flight recorded data in daily life, but wireless signals can affect the flight safety of civil aircraft and control the transmission time of the wireless signals, and the wireless signals cannot be directly used for daily flight data transmission at present, so that the wireless signal transmission is urgently needed under the condition of ensuring the flight safety.
Disclosure of Invention
In order to solve the above problems, the present invention is to establish a wireless transmission power on/off control unit, which provides a control logic that conforms to flight safety and high-efficiency operation, and controls the wireless transmission power on/off, thereby ensuring timely data acquisition and flight safety.
In order to achieve the purpose, the invention provides the following technical scheme:
a wireless transmission on-off control device for aircraft data recording equipment is characterized by comprising a switching value detection circuit and a logic selection circuit; the switching value detection circuit is used for detecting flight state signals and outputting high and low level detection results; the logic selection circuit identifies the flight state and the cabin door state according to whether the high-low level detection result of the flight state signal is communicated with the corresponding polarity selection interface or not, and controls the wireless transmission on-off.
Further, the flight state signal comprises a cabin door signal and an air ground signal; the flight state comprises the air state or the ground state, and the cabin door state comprises the opening state or the closing state.
Further, the switching value detection circuit comprises an optical coupler, a current-limiting resistor and 2 pull-up resistors, switching value signals are accessed, the front end of the optical coupler is connected with the pull-up resistor and the current-limiting resistor, cabin door signals or air-ground signals are accessed to an input positive end of the optical coupler through the current-limiting resistor, a 28V power supply is accessed to the input positive end of the optical coupler through the pull-up resistor, and the input and output negative ends of the optical coupler are grounded; the positive output end of the optical coupler is connected with a power supply (VCC) of the logic selection circuit through a pull-up resistor.
Furthermore, the switching value detection circuits are divided into two groups and are used for respectively detecting cabin door signals and air ground signals; if the hatch signal is 28V, the output is low level, and if the hatch signal is 0V, the output is high level. If the space signal is 28V, the output is low level, and if the space signal is 0V, the output is high level;
further, the logic selection circuit comprises 2 groups of XOR circuits, a pull-up resistor and an AND circuit, each group of XOR circuits is provided with two input ends, one end of each group of XOR circuits is connected with the output end of the switching value detection circuit, the other end of each group of XOR circuits is connected with the polarity selection signal input end and the pull-up resistor, and the other end of each group of XOR circuits is connected with VCC.
Further, the polarity selection interface is an external configuration interface, and when the cabin door signal and the air-ground signal are communicated with the polarity selection interface, the cabin door signal and the air-ground signal are grounded, and when the cabin door signal and the air-ground signal are not communicated, the cabin door signal and the air-ground signal are suspended.
Further, when the polarity selection interface is in suspension and the output end of the cabin door signal or the open-ground signal switching value detection circuit is at a low level, the output of the exclusive-OR gate is at a high level and represents the closing or flying state of the cabin door; otherwise, when the output end of the cabin door signal switching value detection circuit is at a high level, the output of the exclusive-OR gate is at a low level, which represents the opening or landing state of the cabin door; when the polarity selection interface is grounded and the output end of the cabin door signal or air ground signal switching value detection circuit is at a low level, the output of the exclusive-OR gate is at the low level and represents the opening or landing state of the cabin door; otherwise, when the output end of the cabin door signal switching value detection circuit is at a high level, the output of the exclusive-OR gate is at a high level, which represents the closing or flying state of the cabin door.
Further, the output signals of the 2 groups of exclusive-or gate circuits are connected into an AND gate circuit, and the AND gate circuit outputs a power supply control signal to control the on-off of the power supply of the wireless transmission module; when the output signals of the 2 groups of exclusive-OR gate circuits are high level at the same time, the AND gate circuit outputs high level, the power supply is allowed to be switched on, and wireless data transmission is started; in other states, the AND circuit outputs a low level, which does not allow the power to be turned on.
The invention solves the main technical problem that the wireless transmission on-off control unit provides a universal circuit, can flexibly select the polarity of a flight signal, adapts to different types of aircrafts, automatically identifies the flight state of the aircrafts, enables the wireless transmission module to be powered off and stop working in the flight process, avoids radiating radio frequency signals outwards, and enables the wireless transmission module to be powered on and work after landing. The invention ensures that the wireless module is in a power-off state in the flight process of the aircraft, avoids the influence of the radio frequency signal radiated outwards on the flight safety, automatically identifies the flight state and ensures that the wireless data transmission conforms to the working logic allowed by the flight safety.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic block diagram of a wireless transmission switch control unit;
FIG. 2 is a circuit diagram of a wireless transmission power on/off control unit;
Detailed Description
The invention is further described below with reference to the accompanying drawings.
A wireless transmission on-off control device for an aircraft data recording device is shown in figure 1 and figure 2 and comprises a switching value detection circuit 1, a logic selection circuit 2; the switching value detection circuit 1 is used for detecting flight state signals and outputting high and low level detection results; the logic selection circuit 2 identifies the flight state and the cabin door state according to whether the high-low level detection result of the flight state signal is communicated with the corresponding polarity selection interface, and controls the wireless transmission on-off.
The flight state signal comprises a cabin door signal and an air ground signal; the flight state includes in the air or on the ground, and the door state includes open or closed.
The switching value detection circuit 1 comprises an optocoupler 5, a current-limiting resistor R3, 2 pull-up resistors R1 and R2, a switching value signal 3 is accessed, the front end of the optocoupler 5 is connected with pull-up resistors R1 and R2 and a current-limiting resistor R3, a cabin door signal or an air-ground signal is accessed to the input positive end of the optocoupler 5 through the current-limiting resistor R3, a 28V power supply is accessed to the input positive end of the optocoupler 5 through the pull-up resistor R1, and the input negative end and the output negative end of the optocoupler 5 are grounded; the output positive terminal of the optical coupler 5 is connected with a power supply VCC of the logic selection circuit 2 through a pull-up resistor R2.
The switching value detection circuits 1 are divided into two groups and are used for respectively detecting cabin door signals and air ground signals; if the hatch signal is 28V, the output is low level, and if the hatch signal is 0V, the output is high level. The output is low when the ground signal is 28V, and high when the ground signal is 0V.
The logic selection circuit 2 comprises 2 groups of exclusive-or gate circuits XOR, a pull-up resistor R4 AND an AND gate circuit AND, each group of exclusive-or gate circuits XOR is provided with two input ends, one end of each group of exclusive-or gate circuits XOR is connected with the output end of the switching value detection circuit 1, the other end of each group of exclusive-or gate circuits XOR is connected with the polarity selection interface 4 AND the pull-up resistor R4, AND the other end of the pull-up resistor R4 is.
The polarity selection interface 4 is an external configuration interface and is divided into two states of grounding and suspending. When the polarity selection interface 4 is in suspension, and the output end of the cabin door signal or air-ground signal switching value detection circuit 1 is at a low level, the XOR output is at a high level, which represents the closing or flying state of the cabin door; otherwise, when the output end of the cabin door signal switching value detection circuit 1 is at a high level, the XOR output is at a low level, which represents the opening or landing state of the cabin door; when the polarity selection interface 4 is grounded and the output end of the cabin door signal or the open-ground signal switching value detection circuit 1 is at a low level, the XOR output of the exclusive or gate is at a low level, which represents the opening or landing state of the cabin door; otherwise, when the output end of the cabin door signal switching value detection circuit 1 is at a high level, the XOR output of the exclusive or gate is at a high level, which represents the closing or flying state of the cabin door.
The output signal of the 2 groups of exclusive or gate circuits is connected to an AND gate circuit AND, AND the AND gate circuit AND outputs a power supply control signal to control the on-off of the power supply of the wireless transmission module; when the XOR output signals of the 2 groups of XOR circuits are at high level at the same time, the AND circuit outputs high level, the power supply is allowed to be switched on, AND wireless data transmission is started; in the other state, the AND circuit AND outputs a low level, AND the power supply is not allowed to be turned on.
Claims (9)
1. A wireless transmission on-off control device for aircraft data recording equipment is characterized by comprising a switching value detection circuit (1) and a logic selection circuit (2); the switching value detection circuit (1) is used for detecting flight state signals and outputting high and low level detection results; and the logic selection circuit (2) identifies the flight state and the cabin door state according to whether the high-low level detection result of the flight state signal is communicated with the corresponding polarity selection interface or not, and controls the wireless transmission on-off.
2. The control device of claim 1, wherein said flight status signals include a door signal and an air-to-ground signal.
3. The control device as claimed in claim 1, wherein the flight state includes in the air or on the ground, and the door state includes open or closed.
4. The control device according to claim 1, wherein the switching value detection circuit (1) comprises an optical coupler (5), a current limiting resistor (R3), and 2 pull-up resistors (R1, R2) connected to a switching value signal (3), the front end of the optical coupler (5) is connected to the pull-up resistors (R1, R2) and a current limiting resistor (R3), a cabin door signal or a ground signal is connected to the input positive terminal of the optical coupler (5) through the current limiting resistor (R3), a 28V power supply is connected to the input positive terminal of the optical coupler (5) through the pull-up resistor (R1), and the input and output negative terminals of the optical coupler (5) are grounded; the output positive end of the optical coupler (5) is connected with a power supply (VCC) of the logic selection circuit (2) through a pull-up resistor (R2).
5. The control device according to claim 4, wherein the switching value detection circuits (1) are two groups, and detect the hatch signal and the air-ground signal respectively; if the hatch signal is 28V, the output is low level, and if the hatch signal is 0V, the output is high level. The output is low when the ground signal is 28V, and high when the ground signal is 0V.
6. A control device according to claim 1, characterized in that the logic selection circuit (2) comprises 2 groups of exclusive-or circuits (XOR), a pull-up resistor (R4), AND an AND circuit (AND), each group of exclusive-or circuits (XOR) having two inputs, one connected to the output of the switching value detection circuit (1), one connected to the polarity selection interface (4) AND to the pull-up resistor (R4), the other connected to VCC.
7. A control device according to claim 1, characterized in that the polarity selection interface (4) is an external configuration interface, which is divided into two states, ground and floating.
8. The control device according to any one of claims 5 to 7, wherein when the polarity selection interface (4) is suspended, and the output end of the cabin door signal or the air-ground signal switching value detection circuit (1) is at a low level, the output of the exclusive OR gate (XOR) is at a high level, which represents a closed or flying state of the cabin door; otherwise, when the output end of the cabin door signal switching value detection circuit (1) is at a high level, the output of an exclusive OR gate (XOR) is at a low level, which represents the opening or landing state of the cabin door; when the polarity selection interface (4) is grounded and the output end of the cabin door signal or open-ground signal switching value detection circuit (1) is at a low level, the output of an exclusive-OR gate (XOR) is at a low level and represents the opening or landing state of the cabin door; otherwise, when the output end of the cabin door signal switching value detection circuit (1) is at a high level, the output of the exclusive OR gate (XOR) is at a high level, which represents the closing or flying state of the cabin door.
9. The control device of claim 8, wherein the output signal of the 2-group exclusive-or gate (XOR) circuit is connected to an AND circuit (AND), AND the AND circuit (AND) outputs a power control signal to control the power on/off of the wireless transmission module; when the output signals of the 2 groups of exclusive-or gate circuits (XOR) are high level at the same time, the AND gate circuits (AND) output high level, the power supply is allowed to be switched on, AND the wireless data transmission is started; in the other state, the AND circuit (AND) outputs a low level, AND the power supply is not allowed to be turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811463032.XA CN111258241B (en) | 2018-12-03 | 2018-12-03 | Wireless transmission startup and shutdown control device for aircraft data recording equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811463032.XA CN111258241B (en) | 2018-12-03 | 2018-12-03 | Wireless transmission startup and shutdown control device for aircraft data recording equipment |
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| Publication Number | Publication Date |
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| CN111258241A true CN111258241A (en) | 2020-06-09 |
| CN111258241B CN111258241B (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811463032.XA Active CN111258241B (en) | 2018-12-03 | 2018-12-03 | Wireless transmission startup and shutdown control device for aircraft data recording equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022183659A1 (en) * | 2021-03-02 | 2022-09-09 | 广东汇天航空航天科技有限公司 | Switching circuit, switching circuit control method, and aircraft |
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| US6915986B2 (en) * | 2002-11-19 | 2005-07-12 | D'alvia Graham R. | Cockpit access protection system |
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| FR3025492A1 (en) * | 2014-09-05 | 2016-03-11 | Airbus Operations Sas | AIRCRAFT COMPRISING TWO DOORS OF LANDING TRAIN AND A SYSTEM FOR MANEUVERING SAID DOORS |
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Cited By (1)
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| WO2022183659A1 (en) * | 2021-03-02 | 2022-09-09 | 广东汇天航空航天科技有限公司 | Switching circuit, switching circuit control method, and aircraft |
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| CN111258241B (en) | 2021-02-19 |
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