US20070287134A1 - System and Method to Minimize Laser Misalignment Error in a Firearms Training Simulator - Google Patents
System and Method to Minimize Laser Misalignment Error in a Firearms Training Simulator Download PDFInfo
- Publication number
- US20070287134A1 US20070287134A1 US11/753,974 US75397407A US2007287134A1 US 20070287134 A1 US20070287134 A1 US 20070287134A1 US 75397407 A US75397407 A US 75397407A US 2007287134 A1 US2007287134 A1 US 2007287134A1
- Authority
- US
- United States
- Prior art keywords
- weapon
- simulated
- controller card
- compensation
- central computer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G1/00—Sighting devices
- F41G1/54—Devices for testing or checking ; Tools for adjustment of sights
- F41G1/545—Tools for adjustment of sights
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A33/00—Adaptations for training; Gun simulators
- F41A33/02—Light- or radiation-emitting guns ; Light- or radiation-sensitive guns; Cartridges carrying light emitting sources, e.g. laser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G3/00—Aiming or laying means
- F41G3/26—Teaching or practice apparatus for gun-aiming or gun-laying
- F41G3/2616—Teaching or practice apparatus for gun-aiming or gun-laying using a light emitting device
- F41G3/2622—Teaching or practice apparatus for gun-aiming or gun-laying using a light emitting device for simulating the firing of a gun or the trajectory of a projectile
- F41G3/2627—Cooperating with a motion picture projector
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G3/00—Aiming or laying means
- F41G3/26—Teaching or practice apparatus for gun-aiming or gun-laying
- F41G3/2616—Teaching or practice apparatus for gun-aiming or gun-laying using a light emitting device
- F41G3/2622—Teaching or practice apparatus for gun-aiming or gun-laying using a light emitting device for simulating the firing of a gun or the trajectory of a projectile
- F41G3/2655—Teaching or practice apparatus for gun-aiming or gun-laying using a light emitting device for simulating the firing of a gun or the trajectory of a projectile in which the light beam is sent from the weapon to the target
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G3/00—Aiming or laying means
- F41G3/32—Devices for testing or checking
- F41G3/326—Devices for testing or checking for checking the angle between the axis of the gun sighting device and an auxiliary measuring device
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B19/00—Teaching not covered by other main groups of this subclass
Abstract
A weapon simulation system is used to correct the misalignment between a laser of a simulated weapon and an aim point of the simulated weapon. A compensation offset profile and a compensation angle profile are stored in a weapon controller card in the simulated weapon identifying the misalignment of the laser module in the corresponding simulated weapon. The compensation offset profile and compensation angle profile is transmitted from the weapon controller card to a central computer, where the central computer calculates the aim point of the simulated weapon using said compensation offset profile and said compensation angle profile from said weapon controller card. The position of the simulated weapon with respect to a screen of the weapon simulation system is further calculated using an RFID reader in electrical communication with the weapon controller card and at least one RFID tag positioned in a fire line mat, which transmits the position information to said central computer.
Description
- This non-provisional patent application claims priority from provisional patent application 60/803,307, filed on May 26, 2006, which is relied upon and incorporated herein by reference.
- The present invention relates to weapon simulation systems having a sight, and, more particularly, to weapon simulation systems having a sight with a laser to calculate the correct orientation of a simulated weapon.
- Firearms training simulators train police and military personnel with the proper use and handling of weapons without using real firearms and their associated ammunition. The firearms simulator is designed for indoor training in a safe environment, and uses infrared laser modules housed in the barrel of a simulated weapon as a means to determine where the weapon is pointing on a two-dimensional screen. The distance between the student and the screen is very short relative to real world distances since the simulation is done in a typical interior room. In particular, firing line distances of twenty feet are not uncommon for a screen that may span thirty feet wide.
- Students use the day or optical sight of the simulated weapon to aim the firearm. In the real world, a process called boresighting, which involves mechanically adjusting a weapon's sight, is used to ensure that the sight of the simulated weapon is calibrated correctly to the shooter. With boresighting, the barrel is aimed at a point of reference, and is confirmed by an optical reference. This may be achieved by using the eye to look through the barrel, or by placing a suitable light source (e.g., a laser) into the barrel. The sight is then aligned to the same point of reference. Thus, once the firearm is boresighted, the sight can be “zeroed” by firing live rounds.
- For a weapon simulator, there is no projectile to verify the accuracy of boresighting as with actual weapons. Consequently, an electronic boresight is used to determine the offset necessary to determine the relationship between the laser impact and line of sight. Ideally, this electronic boresight should be able to define the relationship without respect to where the student is aiming on the screen. However, if there is any misalignment of the laser relative to the sight, then the only correct point is at the point of boresight and everywhere else would be incorrect.
- An example of this problem of misalignment in the horizontal direction (X) is illustrated in
FIG. 1 , wherein a simulatedweapon 10 is aimed at ascreen 12 bearing the system targets. The simulatedweapon 10 is shown in twopositions aim point line aim point line laser line weapon 10A is shown at the position at boresight. In order for the simulator to accurately determine the relationship between the line of sight or theaim point line 14 and the laser impact orlaser line 16 over theentire screen 12, certain factors must be known. These factors include the amount of misalignment between thelaser path 16 and line ofsight 14. Because of the configuration of the room surrounding theweapon simulator 10, any error caused by misalignment is amplified across the horizontal span of thescreen 12. That is, the projectedlength screen 12 between the line of sight oraim point 14 andlaser impact 16 changes significantly with changing position and orientation between the simulatedweapon 10 and thescreen 12 as shown in a comparison of the positions ofweapon simulator 10A andweapon simulator 10B inFIGS. 1 and 2 . The distance between theaim point line 14A and theactual laser line 16A of thefirst weapon position 10A is theerror distance 18A, and the distance between theaim point line 14B and theactual laser line 16B of asecond weapon 10B is theerror distance 18B. Clearly thesecond error distance 18B is much greater than thefirst error distance 18A due to the orientation and position of eachweapon position weapon error distances FIG. 2 , make it difficult for acentral computer 15 of the weapon simulation system to ignore and compensate for this error since the misalignment could be large and unpredictable because the origination of thelaser path corresponding weapon simulator - One partial solution is to mechanically align the
laser line 16 with the line ofsight 14 in the horizontal direction (X). However, because of tolerances in both the simulatedweapon 10 and the measurement fixture, a repeatable perfect alignment of thelaser line 16 may not be cost effective in a production environment. In addition, the mechanical alignment would not compensate any misalignment in the vertical direction (Y) since the aim point requires a clear path of any obstructions, such as the laser module, and readjustment would be necessary every time a new type of sight is used. -
FIG. 1 is a top view illustration of different aim points of simulated weapons on a target or screen at different positions; -
FIG. 2 is a top view illustration of different aim points of simulated weapons on the target or screen at different positions as illustrated inFIG. 1 , with the weapons starting at different positions; -
FIG. 3 is a top view illustration fromFIG. 1 showing a first error reduction due to misalignment using ELPM; -
FIG. 4 is a top view illustration fromFIG. 1 showing a second error reduction due to misalignment using ELPM and LCSPS; -
FIG. 4 a is a top view illustration fromFIG. 4 showing an enlarged view of a simulated weapon illustrating offset and angle misalignment in the horizontal direction; -
FIG. 5 is an illustration of a simulated weapon user on a student positioning system; and -
FIG. 6 is an illustration of a simulated weapon having components for error correction illustrating offset and angle misalignment in the vertical direction. - A weapon simulation system and method to minimize laser misalignment error in a firearms training simulator addresses the problems in error correction found in conventional weapons simulators, providing a more accurate and cost effective solution to correcting the errors, is illustrated in the attached drawings. The
weapon simulation system 8 includes a simulatedweapon 10 having aweapon controller card 24 that is in electrical communication with acentral computer 15, with the central computer creating and controlling the simulation scenario broadcast on ascreen 12. The simulatedweapon 10 includes alaser module 29 that generates alaser line 16 to be directed at a simulated target generated by thecentral computer 15 on thescreen 12. Furthermore, thecentral computer 15 will monitor when the simulatedweapon 10 has been fired and control scenarios surrounding operation of the simulated weapon 10 (such as when the simulated weapon experiences a simulated malfunction). - Referring to
FIGS. 3-6 , accuracy of the measurement of thelaser line 16 location on thescreen 12 is improved through the use of an electronic laser profiling system or method (referred to as “ELPS” or “ELPM”) 20 in a simulated weapon 10 (seeFIG. 6 ) and a low-cost student positioning system (or “LCSPS”) 22 in the environment surrounding the simulated weapon 10 (seeFIG. 5 ). More specifically, the ELPS 20 can be used alone, as illustrated inFIG. 3 , depending on the amount oferror 21 that can be tolerated in a particularweapon simulation system 8. That is, if thecentral computer 15 assumes that the simulatedweapon 10 is in a particular predetermined location in the X, Y, and Z directions at all times (as shown as 10A), even when the simulatedweapon 10 is moved from that location (as shown as 10B), theerror 21 is determined by having thecentral computer 15 extrapolate an assumedlaser line 16C generated from simulated 10A rather than simulatedweapon 10B to calculate an assumedaim point line 14C. Theerror 21 is the difference between the assumedaim point line 14C and the actualaim point line 14B. Alternatively, both theELPS 20 and LCSPS 22 may be employed to allow for the use of compensation offsets D, D2 and angles θ, θ2 profiles relative to a known reference plane P that are stored in each simulatedweapon 10 for each of its sights/optics to determine the error that is needed to be corrected (seeFIG. 4 ), and theaim point 17B is precisely located on thescreen 12 according to theactual aim line 14B, analogous toaim point 17A being precisely located on thescreen 12 according to theactual aim line 14B since it is at the boresight position. - Referring to
FIG. 6 , the ELPS 20 incorporates the use of aweapon controller card 24 in the simulatedweapon 10. Theweapon controller card 24 includes a microprocessor/microcontroller having an electronic memory that will store information characterizing the alignment of a laser path 16 (emitted by laser module 29) relative to thesights 27 affixed to the simulatedweapon 10. Theweapon controller card 24 is connected with any sensors mounted in or affixed to the simulatedweapon 10, and handles communication between the sensors and acentral computer 15. More specifically, the actual positions of thelaser impact 16 are noted for thesight 27, typically at the time when the simulatedweapon 10 is being manufactured. The horizontal and vertical offsets D, D2 between thesight 27 and thelaser path 16 as well as the horizontal and vertical angles θ, θ2 between theaim point 14 andlaser line 16 are measured for eachsight 27 relative to a known reference plane P in order to ensure that thelaser line 16 will match the line ofsight 14 at the specifiedfiring line distance 19. This data is then stored in theweapon controller card 24, which is housed in the simulatedweapon 10. Because this information is electronically stored in the simulatedweapon 10 itself, there are no moving parts that can cause the information to be incorrect (unlike mechanically corrected alignment between the laser beam fromlaser module 29 and sights 27), and it guarantees that any variations among designs of simulatedweapon 10 will be consistent and minimized. - The
weapon controller card 24 stores this profile data (including compensation offset profiles and compensation angle profiles) electronically in the simulatedweapon 10 to provide the adjustment information to thecentral computer 15 for theweapon simulation system 8. TheELPS 20 uses the offsets D, D2 from theaim point 14 of the simulatedweapon 10 as a comparison to theactual laser hit 16 at thefiring line distance 19 and the angles θ, θ2 between theaim point lines laser lines sights 27. TheELPS 20 will allow thecentral computer 15 of theweapon simulator 10 to calculate the correct offset for any path in which thelaser path 16 will follow at distances different from the boresighted point to allow theweapon simulator 10 to correct any misalignment of thelaser path 16 if the position of theweapon simulator 10 is known (that is, the position of the simulated weapon from the target on the screen 12). - Using the
ELPS 20, the boresighting of thelaser path 16 can be more exact, consistent, and robust, unlike a mechanical adjustment that will always have some tolerance stack up and human error, and will further be subjected to mechanical damage. Once the simulatedweapon 10 is registered on theweapon controller card 24, the particular electronic laser profile will be downloaded to thecentral computer 15 of theweapon simulation system 8 so that thecentral computer 15 can adjust thelaser position 16 electronically to compensate for any misalignment orerror distance - Once the offsets D, D2 and the departing angles θ, θ2 of the
laser beam 16 relative to the line ofsight 14 are known from theweapon controller card 24, the next step is to determine the originating position of laser on theweapon simulator 10 using theLCSPS 22. Since thefiring line distance 16 from the screen 12 (in the Z-direction), the unknowns are that are needed to truly determine the student's aim point in the simplified two-dimensional illustration are the horizontal position (or X-direction) and the vertical position (or Y-direction). However, in order to realize this method into three-dimensional space, the cant of thesimulated weapon 10 is a factor and must be included in the calculations to determine the actual aim point. Consequently, acant sensor 31 is included in theweapon simulator 10 to determine the cant angle of thesimulated weapon 10 and transmit the corresponding information to theweapon controller card 24, which is in electrical communication with thecentral computer 15 to factor in the cant angle in determining the position of theweapon controller card 24. Thecant sensor 31 is needed because there is a physical offset between thelaser module 29 and theaim point line 14, and the cant angle occurs when the student does not hold thesimulated weapon 10 in a substantially vertical position. - The
LCSPS 22 can determine the unknown X- and Y-positions of thesimulated weapon 10 through the use of Radio Frequency Identification (or “RFID”). RFID technology is designed to be a very low cost means for product identification and tracking, and has been adopted by the military and retail sector as a “smart” alternative way of bar coding products for specific identification. More specifically, the RFID system uses RFID tags 26 and anRFID reader 28 to monitor an item. Referring toFIG. 5 , theLCSPS 22 includes afire line mat 30 having the RFID tags 26 embedded in a grid system at known, pre-determined distances with respect to thefire line mat 30. The RFID tags 26 are distributed in thefire line mat 30 according to the amount of error that can be tolerated in a particular system. That is, the more RFID tags 26 that are used in afire line mat 30, the more accurate the measurement of theRFID reader 28 of the position of theuser 6. - RFID tags 26 require no external power source; rather, the power is generated by the radio frequency energy that is transmitted to each
RFID tag 26. The identification of eachRFID tag 26 is the distance from a reference tag. TheRFID reader 28 can have sensing distance of about six feet. Therefore, theRFID reader 28 can read anyRFID tag 26 within its range to determine the actual position of thesimulated weapon 10 and student along thefiring line mat 30. TheRFID reader 28 can be located in or proximate thesimulated weapon 10, and theRFID reader 28 communicates with theweapon controller card 24 of thesimulated weapon 10. Theweapon controller card 24 is in communication with the central simulation computer 15 (via either a wireless or wired connection 23), and transmits the position of thesimulated weapon 10 to thecentral simulation computer 15 as part of the firing packet of thesimulated weapon 10 so that thecentral simulation computer 15 can use this information and the data from theELPS 20 to compensate for the error caused by physical misalignment of thesight 27 andlaser line 16. This method of sensing the position of thesimulated weapon 10 will continuously monitor the position of the student to allow the student to move around during a simulation exercise. - Alternatively, if the simulation does not require the students to move from a single location, then the student's position can be entered into the
simulation computer 15 by the instructor at the beginning of an exercise. In this way, the use of anLCSPS 22 or any other position sensing technology is not necessary and only theELPS 20 is used to compensate the misalignment error. - Having thus described exemplary embodiments, it should be noted by those skilled in the art that the within disclosures are exemplary only and that various other alternatives, adaptations, and modifications may be made within the scope of this disclosure as described herein and as described in the appended claims.
Claims (9)
1. In a weapon simulation system, a method for correcting the misalignment error between a laser of a simulated weapon and an actual aim point line of the simulated weapon, said method comprising the steps of:
a) storing a compensation offset profile and a compensation angle profile in a weapon controller card in the simulated weapon;
b) transmitting said compensation offset profile and said compensation angle profile from said weapon controller card to a central computer;
c) calculating the misalignment error of an aim point on a screen of the aim point line by said central computer using said compensation offset profile and said compensation angle profile from said weapon controller card; and
d) identifying the actual aim point in the central computer by using the misalignment error.
2. The method as described in claim 1 , wherein prior to step a) further comprising:
measuring at a known reference plane a compensation angle between the aim point line corresponding to the position of the simulated weapon and a laser path generated by a laser module in the simulated weapon to generate a compensation angle profile.
3. The method as described in claim 1 , wherein prior to step a) further comprising:
measuring at a known reference plane a compensation offset between the aim point line corresponding to the position of the simulated weapon and a laser path generated by a laser module in the simulated weapon to generate a compensation offset profile.
4. The method as described in claim 1 , prior to step c), further comprising the step of:
determining position information of the location of the simulated weapon with respect to a screen of the weapon simulation system using an RFID reader and at least one RFID tag positioned in a fire line mat, said RFID reader in electrical communication with said weapon controller card; and
transmitting said position information from said weapon controller card to said central computer for calculating the misalignment error of the aim point on the screen.
5. The method as described in claim 4 , further comprising the steps of:
connecting an RFID reader with the simulated weapon, said RFID reader in electrical communication with said weapon controller card.
6. The method as described in claim 1 , wherein prior to step c), further comprising:
measuring the cant angle position of the simulated weapon with a cant sensor in electrical communication with said weapon controller card; and
transmitting said cant angle position from said weapon controller card to said central computer to compensate the position of aim point.
7. A weapon simulation system minimizing laser misalignment error, said weapon simulation system comprising:
a central computer controlling a weapon simulation;
a simulated weapon having a laser module and a sight; and
a weapon controller card connected with said simulated weapon and in electrical communication with said central computer, said weapon controller card storing a compensation offset profile and a compensation angle profile in said weapon controller card.
8. The system as described in claim 7 further comprising a cant sensor housed in said simulated weapon, said cant sensor in electrical communication with said weapon controller card to transmit a cant angle to said weapon controller card.
9. The system as described in claim 7 further comprising:
a fire line mat having at least one RFID tag positioned therein; and
a RFID reader in electrical communication with said weapon controller card, said RFID reader connected to the simulated weapon to identify the location of said simulated weapon when said RFID reader detects said RFID tag, said weapon controller card transmitting said compensation offsets and angle profile and said location information to said central computer.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/753,974 US20070287134A1 (en) | 2006-05-26 | 2007-05-25 | System and Method to Minimize Laser Misalignment Error in a Firearms Training Simulator |
US13/209,924 US20110300515A1 (en) | 2006-05-26 | 2011-08-15 | System and method to minimize laser misalignment error in a firearms training simulator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80330706P | 2006-05-26 | 2006-05-26 | |
US11/753,974 US20070287134A1 (en) | 2006-05-26 | 2007-05-25 | System and Method to Minimize Laser Misalignment Error in a Firearms Training Simulator |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/209,924 Continuation US20110300515A1 (en) | 2006-05-26 | 2011-08-15 | System and method to minimize laser misalignment error in a firearms training simulator |
Publications (1)
Publication Number | Publication Date |
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US20070287134A1 true US20070287134A1 (en) | 2007-12-13 |
Family
ID=39589144
Family Applications (2)
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US11/753,974 Abandoned US20070287134A1 (en) | 2006-05-26 | 2007-05-25 | System and Method to Minimize Laser Misalignment Error in a Firearms Training Simulator |
US13/209,924 Abandoned US20110300515A1 (en) | 2006-05-26 | 2011-08-15 | System and method to minimize laser misalignment error in a firearms training simulator |
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US13/209,924 Abandoned US20110300515A1 (en) | 2006-05-26 | 2011-08-15 | System and method to minimize laser misalignment error in a firearms training simulator |
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US (2) | US20070287134A1 (en) |
WO (1) | WO2008082686A2 (en) |
Cited By (6)
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CN103808203A (en) * | 2014-02-24 | 2014-05-21 | 浙江工业大学之江学院 | Shooting aiming track detection method based on aiming cursor on target and gun gesture detection |
CN103808204A (en) * | 2014-02-24 | 2014-05-21 | 浙江工业大学之江学院 | Shooting aiming track detection method based on live ammunition bullet holes in target and gun gesture detection |
CN108106495A (en) * | 2017-12-19 | 2018-06-01 | 中国科学院长春光学精密机械与物理研究所 | A kind of bearing calibration of laser error angle |
US20190226809A1 (en) * | 2018-01-22 | 2019-07-25 | Crimson Trace Corporation | Sight for firearm |
US20210048276A1 (en) * | 2019-08-14 | 2021-02-18 | Cubic Corporation | Probabilistic low-power position and orientation |
US20210302128A1 (en) * | 2019-08-14 | 2021-09-30 | Cubic Corporation | Universal laserless training architecture |
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US8545226B2 (en) * | 2007-02-23 | 2013-10-01 | Christian Emmanuel Norden | Firearm shooting simulator |
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Also Published As
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WO2008082686A3 (en) | 2008-10-02 |
US20110300515A1 (en) | 2011-12-08 |
WO2008082686A2 (en) | 2008-07-10 |
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