EP0016919A1 - Dispositif pour détecter le franchissement de la ligne d'arrivée par les participants d'une course - Google Patents
Dispositif pour détecter le franchissement de la ligne d'arrivée par les participants d'une course Download PDFInfo
- Publication number
- EP0016919A1 EP0016919A1 EP80100461A EP80100461A EP0016919A1 EP 0016919 A1 EP0016919 A1 EP 0016919A1 EP 80100461 A EP80100461 A EP 80100461A EP 80100461 A EP80100461 A EP 80100461A EP 0016919 A1 EP0016919 A1 EP 0016919A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- receiving antennas
- transmitter
- induction loops
- crossing
- 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.)
- Granted
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Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
- G07C1/22—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people in connection with sports or games
Definitions
- the invention relates to a device for detecting the finish of participants of a race, in which the participants are each equipped with a transmitter that has at least two receiving antennas at the destination and receivers connected to the receiving antennas.
- a competition timekeeping and display system is known (DE-OS 21 41 001), in which two receiving antennas are arranged at the finish line in the floor of the racetrack, which consist of adjacent conductor loops which are successively run over by the participants in a car race.
- Each of the participants is equipped with a transmitter that is selective Transmitter sends out and receivers are connected to the receiving antennas, which are selectively matched to the identifiers of the transmitter.
- the transmitters When the receiving antennas are passed over, the transmitters generate signals in these which are evaluated and not only lead to the determination of the passage of the finish but also to the identification of the subscriber concerned.
- the signals generated one after the other in the two antennas are summed up, resulting in an overall signal curve with three successive voltage peaks.
- the evaluation or detection of such a signal curve using electronic means for the exact determination of the target passage is difficult.
- the transmitter of every racing car generates approximately the same voltage curve over time on the antennas, the amplitudes of the curves can differ greatly from one another at different finishings. This can be due, for example, to the fact that the transmission powers of the individual transmitters are different, or to the fact that the transmitters are at different distances from the road. If the finish crossing signal is only generated after a proper sequence of three voltage peaks has been detected on the receiving antennas, then the racing car has already passed the finish line so that the indicated timing of the finish crossing does not exactly match the actual finish crossing.
- the known antenna system is also sensitive to deliberately generated interference. For example, it is possible to set up a transmitter in the vicinity of the antenna system, which generates a signal curve with three voltage peaks according to FIG. 5 in order to simulate a target crossing.
- the receiving system would respond to such a stationd.Sender as it g only the Truspannun sverlauf analyzed together on all three antennas, but does not check whether the voltage maxima occur at the individual antennas in turn.
- the object of the invention is to provide a device of the type mentioned, which enables a very fast and therefore exact determination of the finish and is insensitive to short and long-distance interference in that it only responds to moving transmitters, but not to stationary transmitters .
- the two receiving antennas are arranged with directional sensitivity running essentially at right angles to one another, and that a target crossing signal is generated when the signal of one receiving antenna is above a high first threshold value and the signal of the other receiving antenna is below a low one second threshold.
- the signal of the first receiving antenna rises slowly when a transmitter approaches the receiving antenna, reaches its maximum when the transmitter has reached the smallest distance from the receiving antenna and then decays again. In the vicinity of the target crossing in front of and behind the target, the signal level of the first receiving antenna exceeds the first threshold. This area is relatively large and is not sufficient for an accurate determination of the target passage.
- the exact destination is determined by the second receiving antenna, the main receiving direction of which is perpendicular to that of the first receiving antenna.
- the signal that the transmitter of a subscriber approaching the target generates on the second receiving antenna rises with increasing proximity, but drops sharply to zero shortly before reaching the target and rises sharply again after crossing the target and then again to subside. The sudden drop in this signal during the passage of the target is used to accurately determine when the target has been reached.
- the signals of the two receiving antennas can be evaluated using simple technical means. All you need is two threshold switches to determine whether the two conditions of the AND condition are met.
- the receiving antennas are induction loops, one of which is arranged in a substantially horizontal plane and the other in a substantially vertical plane.
- the levels of the induction loops can cross each other in the middle of the loop.
- the wavelength of the transmission signals should be large compared to the length of the loops in order to avoid standing waves on the induction loops.
- the identifiers of the individual transmitters consist in the fact that each transmitter transmits a selective frequency to which the relevant receivers of the measuring device are tuned. This tuning can be done with crystal controlled oscillators. Different identifications are also possible due to different modulations of a single transmission frequency.
- the induction loops are preferably sunk in the floor of the racetrack with main axes running transversely to the direction of movement of the participants.
- Such an installation of the receiving antennas in or under the floor along the finish line avoids disturbances of the competition participants and the spectators. It is not visually recognizable at all and ensures high accuracy. It has thus been found that the presence of a transmitter can be determined with certainty in a range of a few angular degrees with respect to the vertical plane passing through the common axis of the receiving antennas.
- the target crossing signal is therefore generated precisely when the transmitter in question is exactly above the target degrees below which the two receiving antennas are laid.
- the induction loops are preferably attached to a common carrier body.
- This can be a pipe.
- the required dimensional stability of the two receiving antennas is thus achieved, so that no deformations of the induction loops can occur when laid in the ground.
- the wires of the induction loops can also be attached to the inner wall of the tube.
- the device shown is particularly suitable for detecting the passage of the finish in car races.
- transmitters are attached to the individual racing cars, all of which emit different frequencies.
- the transmitters are preferably mounted under the floor panels of the racing cars or embedded in a cutout on the floor panel. Their main radiation direction is perpendicular downwards.
- the racing car forms a shield that prevents a larger proportion of the radiation from being emitted upwards and to the sides. Due to the low ground clearance of racing cars, the transmitters are very close to the ground, so that they manage with low transmission power.
- the two induction loops 10, 11 are laid below the finish line in the floor of the racetrack.
- the direction of travel of the racing car is indicated by the arrow 12.
- the main directions of the induction loops 10 and 11 are transverse to the direction of travel 12.
- Each induction loop consists of two parallel conductors 13, 14 which are connected at one end by a connecting conductor 15. The opposite ends of the conductors 13, 14 are connected to the evaluation device.
- the conductors of the first induction loop 10 lie in a substantially horizontal plane, while the conductors of the induction loop 11 are arranged in a substantially vertical plane.
- the levels of the two induction loops cross each other in the middle of the loop.
- the ends of the horizontal induction loop 10 are connected to a series of selective receivers E 1 , only one of which is shown in FIG. 1, and the ends of the vertical induction loop 11 are connected to a series of frequency-selective receivers, of which only in FIG. 1 represents a receiver E2 is posed.
- Each transmitter or each racing car is a Em p ä f n g p he aar E1, E2 assigned, which is tuned to the frequency of the respective transmitter.
- FIG. 2 shows the voltage curve U 1 at the output of the receiver E 1 , which results when the racing car assigned to the relevant pair of receivers crosses the finish line. It can be seen that the voltage U 1 rises as the racing car approaches the finish line, assumes its maximum value in the finish passage z and then subsides again. On the basis of the voltage U 1 , the exact time of the target crossing cannot be determined easily because the curve is too flat in the area of the maximum.
- the voltage curve U 2 at the output of the receiver E2 is shown in Figure 2b. Since the directional characteristic of the induction loop 11 is mainly horizontal, the voltage U 2 has a first maximum 16 if the transmitter is still in front of the finish line and a second maximum 17 if the transmitter is already behind the finish line. In between there is a sharp dip 18, because if the transmitter is exactly in the vertical plane of the induction loop 11, ie above the target line, no voltage is induced in the vertical induction loop 11 at all. The voltage U 2 therefore drops sharply briefly to zero in the exact target crossing.
- a first threshold value circuit 19 is connected downstream of the receiver E 1 .
- a relatively high threshold value 20 is set at this.
- the threshold circuit 19 outputs an output signal when the voltage U 1 the threshold worth exceeds 20. As FIG. 2a shows, this is the case in a certain period of time before and after the target passage z.
- the high directional sensitivity of the vertical induction loop 11 is used to determine the exact target passage z, while the first induction loop 10 is used to delimit the larger time range in which a target passage signal 25 is possible.
- Figure 3 shows a realization of the induction loops 10, 11. These are attached to the inner wall of a plastic tube 26, in such a way that the two induction loops 10 and 11 are perpendicular to each other.
- the induction loops are protected from damage and deformation by the tube 26.
- the tube 26 can be embedded or sunk into the ground with the horizontal tube axis transverse to the carriageway.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Near-Field Transmission Systems (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT80100461T ATE393T1 (de) | 1979-04-07 | 1980-01-30 | Einrichtung zur erfassung des zieldurchganges von teilnehmern eines rennens. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2914137A DE2914137C2 (de) | 1979-04-07 | 1979-04-07 | Einrichtung zur Erfassung des Zieldurchganges von Teilnehmern eines Rennens |
DE2914137 | 1979-04-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0016919A1 true EP0016919A1 (fr) | 1980-10-15 |
EP0016919B1 EP0016919B1 (fr) | 1981-11-11 |
Family
ID=6067761
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80100461A Expired EP0016919B1 (fr) | 1979-04-07 | 1980-01-30 | Dispositif pour détecter le franchissement de la ligne d'arrivée par les participants d'une course |
Country Status (4)
Country | Link |
---|---|
US (1) | US4315242A (fr) |
EP (1) | EP0016919B1 (fr) |
AT (1) | ATE393T1 (fr) |
DE (1) | DE2914137C2 (fr) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3501033A1 (de) * | 1985-01-15 | 1986-07-17 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Fahrzeugverkehrsmessung |
US4943805A (en) * | 1986-11-13 | 1990-07-24 | Dennison James L | Conduit-enclosed induction loop for a vehicle detector |
AU620137B2 (en) * | 1988-08-12 | 1992-02-13 | Dorian Industries Pty. Ltd. | Timing apparatus |
BR8907603A (pt) * | 1988-08-12 | 1991-07-30 | Dorian Ind Pty Ltd | Aparelho de cronometragem |
DE4100073A1 (de) * | 1991-01-04 | 1992-07-09 | Thomas H Richter | Vorrichtung zur ueberwachung von spielfeldbegrenzungslinien mittels elektronischer naeherungssensoren sowie eines mit elektronischen messmethoden erfassbaren balles, vornehmlich eines tennisballes |
US5194843A (en) * | 1991-06-24 | 1993-03-16 | Progressive Concepts, Inc. | Automatic vehicular timing and scoring system |
DE4143246A1 (de) * | 1991-12-31 | 1993-07-01 | Privates Inst Fuer Physikalisc | Verfahren zum erfassen von zwischen- und endzeiten bei sportlichen veranstaltungen |
US5436611A (en) * | 1993-07-09 | 1995-07-25 | Arlinghaus, Jr.; Frank H. | Race recording and display system |
US5467084A (en) * | 1994-03-28 | 1995-11-14 | Jervis B. Webb Company | Vehicle position determining apparatus |
DE4443402A1 (de) * | 1994-12-07 | 1996-06-13 | Georg Dipl Ing Taubmann | Verfahren zum Erfassen von Wettkampfzeiten |
AUPN861396A0 (en) * | 1996-03-12 | 1996-04-04 | Dorian Industries Pty. Ltd. | Timing apparatus and method |
AU705614B2 (en) * | 1996-03-12 | 1999-05-27 | Dorian Industries Pty. Ltd. | Timing apparatus and method |
DE10118870B4 (de) * | 2001-04-18 | 2005-03-03 | Koenig & Bauer Ag | Transportvorrichtungen zum Einziehen einer Bahn in eine Maschine zur Bearbeitung von Bahnen |
DE102010060571B3 (de) | 2010-11-16 | 2011-11-17 | Sportident Gmbh | Verfahren und Anordnung zur Erfassung von Passierzeiten an Kontrollstellen, insbesondere bei Sportveranstaltungen |
DK3035298T3 (da) * | 2014-12-19 | 2021-05-25 | Mylaps B V | Bestemmelse af transittiden for en bevægelig transponder |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1541692A (fr) * | 1967-05-30 | 1968-10-11 | Dassault Electronique | Système électrique pour le contrôle du trafic de véhicules terrestres |
US3644825A (en) * | 1969-12-31 | 1972-02-22 | Texas Instruments Inc | Magnetic detection system for detecting movement of an object utilizing signals derived from two orthogonal pickup coils |
DE2141001A1 (de) * | 1970-08-17 | 1972-05-18 | Conrac Corp | Wettkampfzeitnahme- und Anzeigesystem |
DE2150009A1 (de) * | 1971-10-07 | 1973-04-12 | Waechtler Maximilian Dr | Funkpeilanordnung |
US3967280A (en) * | 1975-01-27 | 1976-06-29 | Rockwell International Corporation | Direction finding system with integrated loop and sense antenna assembly |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3526886A (en) * | 1968-03-26 | 1970-09-01 | Westinghouse Air Brake Co | Precision location detector |
US3697996A (en) * | 1969-07-11 | 1972-10-10 | Minnesota Mining & Mfg | Electromagnetic field producing apparatus and method for sequentially producing a plurality of fields |
US3795907A (en) * | 1973-03-12 | 1974-03-05 | R Edwards | Race calling system |
-
1979
- 1979-04-07 DE DE2914137A patent/DE2914137C2/de not_active Expired
-
1980
- 1980-01-30 AT AT80100461T patent/ATE393T1/de active
- 1980-01-30 EP EP80100461A patent/EP0016919B1/fr not_active Expired
- 1980-03-25 US US06/133,838 patent/US4315242A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1541692A (fr) * | 1967-05-30 | 1968-10-11 | Dassault Electronique | Système électrique pour le contrôle du trafic de véhicules terrestres |
US3644825A (en) * | 1969-12-31 | 1972-02-22 | Texas Instruments Inc | Magnetic detection system for detecting movement of an object utilizing signals derived from two orthogonal pickup coils |
DE2141001A1 (de) * | 1970-08-17 | 1972-05-18 | Conrac Corp | Wettkampfzeitnahme- und Anzeigesystem |
DE2150009A1 (de) * | 1971-10-07 | 1973-04-12 | Waechtler Maximilian Dr | Funkpeilanordnung |
US3967280A (en) * | 1975-01-27 | 1976-06-29 | Rockwell International Corporation | Direction finding system with integrated loop and sense antenna assembly |
Also Published As
Publication number | Publication date |
---|---|
ATE393T1 (de) | 1981-11-15 |
US4315242A (en) | 1982-02-09 |
DE2914137B1 (de) | 1980-08-07 |
EP0016919B1 (fr) | 1981-11-11 |
DE2914137C2 (de) | 1981-03-26 |
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