Boots – shoes – and leggings
Patent
1984-05-14
1986-12-30
Chin, Gary
Boots, shoes, and leggings
364571, 340988, G06F 1550
Patent
active
046334076
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Methods and devices for target tracking of vehicles on land are very well known. For example, the DE-OS No. 29 25 656 describes a method for target tracking of vehicles in heavily meshed city road systems by using a vehicle autonomous system. Informations are exchanged between the vehicle and the road station at defined locations in the road system which enable the vehicle computer to define the position and direction of the vehicle. The further travel path and the further travel direction is then determined by picking up and evaluating the wheel rotations. For example, methods and devices for defining of drive angle and drive path are known from the article of T. Tsumura and N. Fujiwara, an experimental system for processing movement information of vehicle, Twenty-Eighth IEEE Vehicular-Technology Conference, Conference Record of Papers, page 163 to 168 and by the article of Jon H. Myer, A Vehicular Planimetric Dead Reckoning Computer, IEEE Transactions on Vehicular Technology, Volume 20, No. 2, August 1971, page 62 to 68. In the known methods, the drive path is determined from the sum of the wheel rotations of the left and the right wheel and the drive angle from the difference of the rotations of the right and the left wheel. It now has been shown that errors occur in particular when defining the drive angle, which cannot be considered negligible if large distances occur between the road stations or if the driver deviates from the preplanned route and therefore does not reach a road station for a longer period of time. Due to the additive misrepresentation of the angle values of the vehicle autonomous locating and navigation system it is then no longer possible to give indications to the driver with which he could reach the desired target location safely and rapidly.
SUMMARY OF THE INVENTION
The method in accordance with the invention and with the characterizing features of the claims has the advantage over the state of the art in that no location errors occur by the road stations even at longer drives without synchronisation. This results in a further advantage in that road stations may be placed at larger distances. As a further advantage the location errors do not occur even after longer drives. A further advantage is that the influence of the speed and the transverse acceleration of the vehicle can be neglected as far as location is concerned.
BRIEF DESCRIPTION OF THE DRAWING
One exemplified embodiment of the invention is illustrated in the drawing and is explained in detail in the following description. FIG. 1 shows an illustration explaining the locating system and FIG. 2 shows a device in accordance with the invention of a locating system for land vehicles.
DESCRIPTION OF THE EXEMPLIFIED EMBODIMENT
Methods for location of land vehicles by means of target tracking in accordance with the planimetric method are known for a long time. In this context we would like to refer to the state of the art mentioned in the statement of invention. The determination of travel path and travel direction is carried out in the known methods by picking up and evaluating the wheel rotations of a vehicle axis which preferably is not driven. Impulse transmitters on the wheels of this axis generate impulses per wheel rotation which are counted by the locating system and from which the position changes of the vehicle are calculated. For example, if a vehicle travels from location 1 in FIG. 1 to location 2, the travel path .DELTA.S is defined in accordance with the following equation right wheel and Z.sub.L is the impulse number which is picked up at the left wheel. Z indicates the number of the impulses per a wheel rotation and U defines the wheel circumference.
The drive angle .phi. is calculated by the equation importance.
During curve travel the wheel base b (assumed to be constant in the second equation) is not constant since the engagement faces of the vehicle tires displace relative to each other during the curve travel in dependency from the travel speed. This results in a false
REFERENCES:
patent: 3849636 (1974-11-01), Helms
patent: 4031630 (1977-06-01), Fowler
patent: 4032758 (1977-06-01), Lewis
patent: 4055750 (1977-10-01), Jellinek
patent: 4084241 (1978-04-01), Tsumura
patent: 4388608 (1983-06-01), Bernard
Freienstein Bernd
Neukirchner Ernst Peter
Pilsak Otmar
Schlogl Dietmar
Chin Gary
Robert & Bosch GmbH
Striker Michael J.
LandOfFree
Method and device for target tracking of land vehicles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for target tracking of land vehicles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for target tracking of land vehicles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1552476