| Transponders : The basics |
| A transponder (transmitter/responder)
is an electronic device used in location systems; activated by a predetermined
signal. Transponder technology has recently been applied to the timing/scoring
of auto racing events, 'locating' race cars as they cross the start/finish
line. Auto racing depends on reliable timing/scoring and speedways are quickly adopting automatic electronic systems (i.e., transponders) to replace traditional manual methods (i.e., scorers). Transponders are efficient, reliable and virtually 100 percent accurate. They eliminate human error and the potential for mistakes, disputes, wrong awards and hard feelings. They have a precision of 0.001 second; can differentiate multiple cars crossing the finish line with high resolution; facilitate line-ups on re-starts; provide real-time information about both front runners and backmarkers to announcers and spectators; and, provide a printable record for competitors. Elements and function of system: The system consists of 1) a transponder which emits a low frequency radio signal with a specific encoded ID (single frequency, unique codes) and beams it to, 2) an antenna (wire loop = standoff sensor buried in the track at the start/finish line) which receives the signal and relays it to, 3) a decoder which deciphers the 7-digit ID code (identifying the car) and relays the information to, 4) a trackside computer which then processes the information and creates a record and database file. The record is a race history - lap times, position changes and finishing order. Transponders must be placed uniformly on all cars in any particular event, a specified distance from the nose of the car and a specified distance from the surface of the track. They must be securely mounted in a vertical position with no downward obstructions. BAD will be using AMB* transponders (model TranX 260), hard-wired or rechargeable; mounted on appropriate brackets with proper hardware. Instructions and guidelines for installation will be provided. This season, transponders will be required for points races at Ocean Speedway and Kings Speedway; Chowchilla Speedway is not yet equipped with the AMB base system. At this point, all we know is that dwarf cars is one class for which transponders will be required. There is no specific language about transponders in the general rules of either speedway. Based on rules at other speedways using transponder systems, it seems reasonable to assume the following: Owners or drivers must buy or rent transponders and have them properly installed. Cars not equipped with transponders will not be allowed to compete at any event for which transponders are used for timing/scoring. Transponders should be in place for all racing activity, including hot laps (a chance to test units). Tech inspector will assure that transponders of all entries (including visitors) meet installation specs (not yet determined). Owners or drivers must keep their transponders in good working order. Track officials will decide what to do in case of malfunction or failure of transponders during a race (e.g., manual scoring backup). *AMB is the leading provider of motorsports timing/scoring devices. Their transponders are tamper-proof, shock-proof, interference-immune and maintenance-free. The TranX 260 is a recent upgrade with 3 year warrany and tech support. The company hosts a dedicated website (www.mylaps.com) where results can be uploaded by track staff and viewed anytime by drivers. Please correct me on any of the above. gene@bayareadwarfs.org |