34 results about "Ground proximity warning system" patented technology

A data communication system for use on a surface or subsurface vessel. The system includes a base system and a plurality of user components. The base system includes a marine enhanced ground proximity warning system (MEGPWS), a communication component, and a wireless transceiver coupled to the MEGPWS. The user component includes a wireless transceiver, an earpiece speaker, a microphone, a heads-up display (HUD), and a processor coupled to the wireless transceiver, the earpiece speaker, the microphone, and the HUD. The processor generates an image for presentation on the HUD based on information received from the base system. Also, the processor receives voice signals from the microphone, prepares and transmits the received voice signals for transmission to the base system, receives voice signals from the base system via the wireless transceiver, and prepares and outputs the voice signals received from the base system via the earpiece speaker.

The invention provides a computer virtual environment simulation and check system for a performance based navigation (PBN) flight program, and belongs to the field of civil aviation navigation. The system comprises a data layer, a model layer, a display layer and an application layer, wherein the data layer is used for processing flight program data, topographic data and barrier data; the model layer provides a navigation system, a dynamic system and an enhanced ground proximity warning system of an airplane for virtual verification of the flight program; the display layer is used for providing two-dimensional display and three-dimensional visual systems for a user during virtual verification; and the application layer provides man-machine interaction and flight program verification applications for the user. The system realizes the verification of the PBN flight program in a virtual environment generated by a computer, is simple and convenient, shortens verification cycle, reduces costs and improves working efficiency; and a result can evaluate flight program design, guide actual flight verification and meet PBN flight program verification demands.

The invention discloses a forward-looking forecast warning system in a ground proximity warning system and a method, which is characterized in that the forward-looking forecast warning system comprises a forward-looking forecast warning processor. The input end of the forward-looking forecast warning processor is connected with an air data computer, a navigation system, radio equipment, and a terrain memory, the aircraft speed and the flight path angle information are received, a warning domain based on the current aircraft position is calculated on the basis of built-in warning domain calculation method, a warning domain on the basis of the geographic coordinate system is calculated in combination with aircraft position information, query is carried out in a terrain database, warning is generated if a terrain invades the warning domain, and the warning information is outputted. The system and the method have the advantages of reducing false alarms and missing alarms to the maximal degree, improving warning performances and ensuring flying security.

Systems and methods for displaying ground obstructions on a visual display are disclosed. In an embodiment, a ground proximity warning system includes at least one aircraft sensor system operable to acquire aircraft data and a ground proximity warning computer coupled to the aircraft sensor system to process the aircraft data that generates ground proximity warning data corresponding to a sensed ground obstruction. An indicating system including a visual display device then presents an image of a visual symbol corresponding to the sensed ground obstruction. At least one of the computer and the visual display device is controllable to selectively display the visual symbol.

Systems and methods for determining if an aircraft is approaching a atmospheric pressure at field elevation (QFE) airport and for alerting if any errors that might affect the production of an accurate altitude value. In an example method a global positioning system (GPS) altitude value is compared to a corrected barometric altitude, if an airport that the aircraft is proximate to (approaching) is a QFE airport. The field elevation of the proximate airport is added to the corrected barometric altitude to generate an adjusted barometric altitude, if the comparison between the GPS altitude and the corrected barometric altitude is greater than a predefined threshold. The adjusted barometric altitude is sent to relevant aircraft systems, such as an Enhanced Ground Proximity Warning System.

A system and methods for managing a visual display in a ground proximity warning system is disclosed. In one embodiment, a system includes at least one aircraft sensor system operable to acquire aircraft data and a ground proximity warning computer coupled to the aircraft sensor system that is operable to process the aircraft data to generate ground proximity warning data corresponding to a sensed ground obstruction. An indicating system including at least one visual display device that is configured to display an image of a visual symbol corresponding to the sensed ground obstruction is coupled to the computer. At least one of the computer and the visual display device is controllable to selectively alter an appearance of the visual symbol on the display.

Systems and methods for managing a visual display in a ground proximity warning system. In one embodiment, a system includes at least one aircraft sensor system operable to acquire aircraft data and a ground proximity warning computer coupled to the aircraft sensor system that is operable to process the aircraft data to generate ground proximity warning data corresponding to a sensed ground obstruction. An indicating system includes at least one visual display device that is operable to display terrain elevations and to display a visual symbol corresponding to at least one of the ground obstructions, wherein at least one of the computer and the visual display device is controllable to selectively alter an appearance of the visual symbol relative to the terrain elevations.

Systems and methods for controlling activation of a look-ahead function of a terrain alert and warning system. The system receives rate of climb and aircraft speed information, compares the rate of climb and aircraft speed information to a predefined threshold, and deactivates a look-ahead function based on the comparison.

The invention discloses a voice warning circuit for a ground proximity warning system. The circuit is characterized by mainly comprising a main processor, a voice chip, a high-pass filtering circuit, an audio amplifier, a balanced circuit driver, an audio transformer and a connector, wherein the main processor is connected with the voice chip and is continuously connected with the high-pass filtering circuit and the audio amplifier; the audio amplifier is further connected to the balanced circuit driver, is continuously connected to the audio transformer and then is connected to the connector. The voice warning circuit for the ground proximity warning system uses an integrated voice chip, can output audios with the maximum sampling rate of 12 kHz, is clear in voice, high in tone quality, adjustable in sound volume and simple to control, and satisfies the requirement of the ground proximity warning system which outputs various different warning voices. The circuit comprises the functions of filtration, amplification, converting a single-end to differential, impedance matching, isolation and the like, can satisfy the electric requirement of an avionics device on an audio interface, and overcomes the defects in the prior art.

The invention discloses a ground proximity warming method based on the flight performance of an aircraft. The ground proximity warming method comprises the following steps: 1, generating and storing aground proximity warming threshold table for describing the corresponding relationship between the maximum climbing angle as well as the maximum climbing angle rate of the aircraft and a ground proximity warming threshold; 2, reading the current maximum normal overload coefficient of the aircraft, and calculating the current maximum climbing angle and maximum climbing angle rate of the aircraft;3, acquiring a corresponding ground proximity warming threshold according to the current maximum climbing angle and maximum climbing angle rate of the aircraft; and 4, performing warning calculation by using the ground proximity warming threshold obtained in the step 3, and giving a warning result. Through adoption of the ground proximity warming method, the warning threshold value is coupled withthe real-time flight performance of the aircraft, so that the warning success rate can be ensured; the false warning rate is lowered; and the comprehensive warning performance of the system is improved.

The invention belongs to the field of airplane ground proximity warning, and particularly relates to a ground proximity warning system alarm inhibition method. The ground proximity warning system alarm inhibition method comprises the steps that an alarm inhibition button with the two responding modes of long pressing and short pressing is arranged on a control panel, when any alarm mode gives an alarm, the button is inhibited through short pressing alarming, and the short pressing alarming mode is inhibited; when the button is inhibited through long pressing alarming, the system is switched between the normal state and the inhibition state. Compared with a plurality of alarm inhibition buttons traditionally, only one button is adopted, long pressing, short pressing and certain control logic are adopted, all alarming inhibition purposes are achieved, the number of adopted buttons is remarkably decreased, the layout difficulty of the control panel is greatly simplified, and particularly the design requirement for specific conditions that the space of the control panel is limited or the number of buttons on the periphery of a displayer is limited can be met.

A ground proximity warning system for an aircraft includes a plurality of alarm generators, each able to generate an alarm by verifying evolution conditions of the aircraft specific to each alarm generator, the verification using data obtained from at least one measuring sensor of the aircraft. The ground proximity warning system includes a unit for selective deactivation of at least some of the alarm generators, able to be implemented during a search and rescue mission carried out by the aircraft, and an auxiliary alarm generator, capable of emitting a ground proximity alarm based on the safety height chosen for the search and rescue mission, when the selective deactivation unit is implemented.

A terrain avoidance system, method and computer program product for reducing nuisance alarms. The system includes a geometric altitude component, first and second vertical safety margin generators, and an alert component.

The invention discloses a multipurpose ground proximity warning system simulation demonstration platform structure based on a terrain database. The platform structure comprises an AC power supply; anAC power adapter; and a portable multipurpose ground proximity warning system simulation demonstration device which comprises an input device according with human body functions, a data calculating and processing module, a large-capacity storage module and a display module with adjustable resolution. The beneficial effects of the platform structure are that: warning function demonstration of various types of ground proximity warning systems can be realized; in display and demonstration of various products, especially in publicity display and demonstration activities without actual products, inconvenience caused by insufficient products or special simulator equipment, large size, large equipment number, inconvenient carrying and high site requirements is greatly reduced, the probability ofdemonstration faults is greatly reduced, and the flexibility and the display effect of display and demonstration are effectively improved.

The invention provides a helicopter ground proximity alarm system flight phase determination method based on data driving, and the method comprises the steps: obtaining flight record data, carrying out the data preprocessing of the flight record data, and obtaining a flight data sample P and a flight phase label CK; generating a data set according to the flight data sample P and the flight stage label CK; building a neural network model; training a neural network model according to the flight data sample P and the flight stage label CK; and obtaining real-time flight data, inputting the real-time flight data into the neural network model, and obtaining the current flight stage of the helicopter through the neural network model.