Method for displaying a battle situation

• US 4,438,438 A
• Filed: 12/24/1980
• Issued: 03/20/1984
• Est. Priority Date: 12/24/1979
• Status: Expired due to Fees

• Current Assignee: Atlas Elektronik GmbH (Thyssenkrupp AG)
• Original Assignee: Fried. Krupp Gesellschaft mit beschrankter Haftung
• Inventors: Arens, Egidius, Schwarz, Hans D., Meyersieck, Manfred, Karlowsky, Ingo, Anding, Norbert, Hampe, Christoph, Leisterer, Reinhard
• Primary Examiner(s): Blum, Theodore M.
• Application Number:
  US06/219,819
• Time in Patent Office: 1,182 Days
• Field of Search: 343/112 R, 343/112 D, 343/112 TC, 343/112 S, 343/112 C
• US Class Current: 342/451
• CPC Class Codes: F41G 5/20 for guns on ships
• CPC Class Codes: F41G 9/00 Systems for controlling missiles or projectiles, not provided for elsewhere
• CPC Class Codes: G01S 5/18 using ultrasonic, sonic, or infrasonic waves

Abstract

A method for displaying a battle situation under consideration and indication of the movement and position of friendly forces and with the position and motion behavior of targets being derived from angle and distance information, wherein: the display takes place on an electronic display device; one or a plurality of passive bearing systems and/or passive distance measuring systems are provided to furnish angle and distance information of targets which radiate wave energy; position, course and speed are calculated for every target per time interval and displayed as motion vectors; angle and distance information on the targets from given time intervals are used for the display of target paths; markers are associated with the targets resulting from their changes in position and/or the characteristics of signals received from the bearing and/or distance measuring systems and these markers are displayed at the associated target positions; and uncertain measurement regions are calculated from the measuring tolerances of the angle and distance information and displayed for each target.

Claims

1. Method for displaying a battle situation under consideration and indication of the movement and position of friendly forces and with the position and motion behavior of targets being determined from angle and distance information derived at the observing or display station, comprising the steps of:

providing an electronic display device for the display of said battle situation;

furnishing angle and distance information of targets which radiate wave energy by means of at least one passive bearing and distance measuring system;

from said angle and distance information, calculating the position, course and speed of every target per time interval and indicating the calculated position, course and speed on said display as respective motion vectors;

determining the path of the targets from given time intervals from said angle and distance information about the targets, and displaying the determined target paths on said display device;

associating specific markers with the targets as a result of determined changes in position of the targets and determined characteristics of signals received from the passive bearing and distance measuring systems, and displaying said markers at the associated target positions; and

calculating uncertain measurement regions for the position of each target from the measuring tolerances of the angle and distance information and displaying said uncertain measurement region around the displayed marker for the associated target.

2. A method as defined in claim 1 wherein said positions of said targets are displayed in polar coordinates with respect to the position of the observing station.

3. A method as defined in claim 1 wherein said battle situation is displayed in a grid with degrees longitude and latitude, and with the position of the observing station and the positions of the targets being displayed with respect to said grid.

4. A method as defined in claim 1 further comprising precalculating target expectation areas for given targets from the actual calculated said position, course and speed of the said given target and their associated measuring tolerances and changes in time, and additionally displaying said target expectation areas on said display.

5. A method as defined in claim 1 wherein:

said step of associating specific markers include displaying each target by a symbol of a given shape at its position;

each said displayed motion vector is an arrow which is associated with a specific target symbol, with the direction of said arrow corresponding to the course and the length of said arrow corresponding to the speed of the associated target;

each said target path is displayed by line elements; and

said uncertain measurement areas and said expectated target position areas are displayed with reduced intensity compared to the displayed said symbols, arrows and line elements.

6. A method as defined in claim 5 further comprising displaying a legend of the symbols and other markers used in said display separately from said display of the battle situation.

7. A method as defined in claim 1 or 5 wherein said at least one passive bearing system furnishes angle information in elevation;

and further comprising calculating the depth of each target from the associated distance information and from the associated angle information in elevation, and displaying the calculated depth in association with every target.

8. A method as defined in claim 1, 4 or 5 further comprising providing a passive bearing system for taking bearings of and evaluating received signals from active transmitting systems, determining the bearing of the active transmitting system, and displaying the bearing of the active transmitting system by a cursor extending between the displayed observation station and the target having said active transmitting system.

9. A method as defined in claim 1 comprising including the measuring tolerances of the passive bearing and distance measuring systems which depend on switchable operating states in said calculation of said uncertain measurement areas.

10. A method as defined in claim 1 wherein said step of associating specific markers includes:

subjecting the received signals from the passive bearing and distance measuring systems associated with each target to a time and frequency analysis, to determine the frequency spectra and their changes in time;

comparing the time curve of the received signals and the associated frequency spectra and their changes in time with signal curves over time and with the frequency spectra and their changes in time for known targets;

assigning different markers to different type targets and signals; and

identifying each type target by said comparison; and

displaying each said identified target by its assigned said different marker.

11. A method as defined in claim 1 further comprising:

taking a bearing on a weapon fired by the observing station in the same manner as for a target; and

displaying the position of the weapon with an appropriate marker on said display of the battle situation.

12. A method as defined in claim 11 further comprising displaying the remaining range and remote controllability of the fired weapon separately from said display of the battle situation.

13. Apparatus disposed on an observing vehicle for practicing the method defined in claim 1 comprising in combination:

a passive bearing system, a passive distance measuring system, and a passive pulse bearing system;

processing means connected in series with the outputs of said passive bearing system and said passive distance measuring system, and responsive to the output signals from same, for calculating the position, course, and speed of each detected target relative to said observing means;

respective computer means connected to the outputs of said signal processing means for calculating said motion vectors, said target paths, and said measuring uncertainty regions and for classifying targets and associating specific markers to same by determining changes in position of the targets and characteristics of their transmitted signals;

means additionally connecting said computer means for classifying to the outputs of said passive bearing system, said passive distance measuring system and said passive pulse bearing system;

an image memory having a series-connected electronic display, said image memory having its inputs connected to the outputs of each of said processing means and each said computer means; and

a control generator means for transmitting control instructions to said passive bearing system, said passive distance measuring system, said passive pulse bearing system, said processing memory, said computer memory and said image memory.

14. Apparatus as defined in claim 13 further comprising a circulating data line having a plurality of data input coupling units connected to the output of said passive bearing system, the output said passive distance measuring system and the output of said passive pulsed bearing system respectively, and a pair of data output coupling units connected to said control generator means and to a data bus bar which is connected to each of said signal processing means and to said computer means for classifying;

a substitute passive bearing and distance measuring system connected to said circulating data line via a substitute data coupling stage; and

means, included in said control generator means, and responsive to the signals in said circulating data line, for causing said substitute passive bearing and distance measuring system to transmit appropriate signals to said signal processing means and said computer means for classifying via said data bus bar upon detection of a malfunction of said passive bearing system or said passive distance measuring system.

15. Apparatus as defined in claim 14 wherein said passive bearing system and said substitute passive bearing and distance measuring system each includes receiving transducer means connected in series with a signal processing unit;

multiplexing circuit means connected between said transducer means and said signal processing unit of at least said passive bearing system, each said multiplexing circuit means having first and second signal inputs connected in series with the outputs of the respective transducers of said passive bearing system and said substitute passive bearing systems respectively, and an output connected to the input of the associated signal processing unit; and

said control generator means includes means for recognizing a faulty one of said signal processing units and for actuating said multiplexing circuit means to cause the faulty said signal processing unit to be circumvented.