Chapter 38: Application 10 - Race Timing (1990s) |
Summary |
In the 1990s, road running exploded in popularity. Marathons that once drew a few thousand participants began attracting tens of thousands. This growth exposed a fundamental problem: how do you accurately time every single runner when they all cross the start line at once and finish in a chaotic streamManual timing with stopwatches and clipboards could not scale. Barcode technology, which had revolutionized retail and logistics, offered no solution because a barcode must be optically scanned at close range with a clear line of sight. A runner sprinting across a finish line at full speed cannot stop to have a laser read a label on their chest. |
The answer came from passive RFID. In 1993, a Dutch race organizer named Heinfried Maschmeyer founded ChampionChip after growing frustrated with the timing chaos at the Seven Hills Run in Nijmegen . Within a year, he and his colleagues had developed a small glass capsule containing a silicon chip and an energizing coil that could be attached to a runner's shoe. When the runner crossed a mat embedded with antennas at the finish line, the chip transmitted a unique identification number. The system worked at sprint speed. It worked in rain and mud. It read thousands of runners per hour without human intervention. |
This chapter explores how ChampionChip and the RFID race timing industry it spawned became one of the most successful and visible applications of passive RFID in the 1990s. It examines the technical limitations of barcodes that made them unsuitable for this task, traces the development of the ChampionChip system, and surveys the many industries and sports that adopted RFID timing in the decades that followed. From marathons to triathlons, from cycling to skiing, from obstacle course races to theme park attractions, the need to identify moving people and objects at speed proved to be a perfect fit for RFID. The 1990s race timing story is not just about stopwatches and finish lines. It is about the moment when the physical world of sports discovered that the silent network of radio waves could do something that light-based identification never could. |
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The Problem with Barcodes and Speed |
To understand why RFID became essential for race timing, one must first understand why barcodes failed. Barcodes are optical technology. They work by reflecting light. A scanner emits a beam, the beam strikes the alternating dark and light bars of the code, and the reflected pattern is decoded into a number. This process requires three things: a clear line of sight between the scanner and the code, sufficient contrast between the bars and the background, and a scanning motion that moves the beam across the code at a readable rate. |
For a marathon finish line, all three requirements collapse. A runner crossing the line at five or six meters per second presents a moving target. The barcode on a race bib flutters and folds with each stride. Sweat and rain distort the paper. Multiple runners cross simultaneously, creating a jumble of bodies and bibs. Even if a scanner could somehow track a single bib in this chaos, the runner would be past the line before the beam completed its sweep. |
The technical literature on barcode scanning reveals why speed is such a fundamental obstacle. A barcode scanner must see the entire symbol, or at least a sufficient portion of it, in a single scan line or a rapid series of scan lines. If the symbol is moving, the scanner's decoder must compensate for the motion. Early barcode readers used tachometers to measure scanning speed and adjust their decoding algorithms accordingly . But this compensation only works within a narrow range. At sprint speed, the relative motion between scanner and barcode becomes too great. The code blurs. The decoder cannot lock onto the pattern. |
More fundamentally, barcodes are designed for stationary or slow-moving objects. A supermarket checkout scanner works because the customer or cashier deliberately positions the product in front of the scanner and holds it there for a fraction of a second. A warehouse barcode scanner works because a worker aims a handheld device at a label and pulls the trigger. A marathon runner crossing a finish line at full speed is the opposite of a barcode's ideal use case. They are moving fast, they are not aiming anything, and they certainly are not pausing to be scanned. |
There is also the question of volume. A large marathon in the 1990s might have twenty thousand or thirty thousand runners. They do not cross the finish line in a neat, spaced-out queue. They arrive in waves. At the peak of the finish, dozens of runners might cross the line within a single minute. A barcode scanning system would need to identify each one individually, at speed, with no line-of-sight obstruction. This is not a problem that can be solved by adding more scanners. It is a problem that requires a different technology entirely. |
RFID offered that different technology. Radio waves do not care about line of sight. They pass through paper, fabric, and even bodies. A passive RFID tag can be energized by a magnetic or electromagnetic field and respond with its unique identifier in milliseconds. The tag does not need to be aimed at. It does not need to be visible. It only needs to pass through the field. For a runner crossing a finish line, this is as simple as running over a mat. |
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The Birth of ChampionChip |
The story of ChampionChip begins with a specific problem at a specific race. The Zevenheuvelenloop, or Seven Hills Run, is a fifteen-kilometer race held in Nijmegen, in the eastern Netherlands. By the early 1990s, it had grown to about ten thousand participants. Heinfried Maschmeyer, the race director, faced a familiar nightmare. With ten thousand runners trying to cross the start line at the same time, tracking start and finish times was nearly impossible . |
The traditional method was manual. Volunteers stood at the start and finish with stopwatches and clipboards. They wrote down bib numbers and times. This worked for small races. It did not work for ten thousand people. Runners at the back of the pack might take several minutes just to reach the start line. Their official time would be wrong unless someone recorded exactly when they crossed. At the finish, runners arrived in unpredictable clusters. Volunteers could not possibly record every number and time accurately. |
Maschmeyer thought there had to be a better way. In 1993, he founded ChampionChip. Within a year, he and two Dutch colleagues had created a working system . The core of the system was a small transponder, a passive RFID tag encased in a waterproof glass capsule. The runner attached it to their shoe with a plastic tie. At the start and finish lines, mats were laid across the road. These mats contained antennas that generated a magnetic field. When the runner's shoe passed over the mat, the tag's coil became energized, and the chip transmitted its unique identification number . |
The system was elegant in its simplicity. The tag had no battery. It was powered entirely by the magnetic field of the mat. It was small and light, about the size of a vitamin pill. It could be worn on a shoe without discomfort. And it worked at any speed. A runner could sprint across the mat at full speed, and the tag would still be read . |
The first major test came at the 1995 Rotterdam Marathon, where ChampionChip was used for intermediate timing at the half marathon point . The following year, ChampionChip achieved a significant milestone at the 1996 Atlanta Olympics, where it was used for intermediate timing in the marathon and race walking events . While photo finishes still determined the official finish times, ChampionChip was the only system capable of automatically registering and distributing split times. Telephone lines were set up at each intermediate point to transmit data in real time . |
The system spread quickly through the running world. By 1998, more than thirty thousand runners in the London Flora Marathon were using the chip . The 1996 Boston Marathon, the one hundredth running of that historic race, also adopted the technology . ChampionChip became synonymous with chip timing. For many runners, the yellow ChampionChip was their first encounter with RFID technology, even if they did not know it by that name. |
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How ChampionChip Worked |
The technology behind ChampionChip was deceptively simple. The tag itself was a passive RFID transponder, typically operating at low frequency. Low frequency RFID, usually at 125 kHz or 134 kHz, has a short read range, typically a few centimeters to a meter. This was perfectly adequate for race timing. The runner's shoe would pass directly over the mat, bringing the tag within range of the antennas embedded in the mat. |
The tag contained a silicon chip and a coil. The chip stored a unique identification number, burned into its memory at manufacture. The coil served two purposes. It captured energy from the magnetic field generated by the mat's antennas, and it transmitted the chip's identification number back to the mat. This is the principle of passive RFID. The tag has no internal power source. It harvests energy from the reader's field. |
The mats themselves were the other half of the system. A typical timing mat was a long, flat arrangement of antennas, often covered with a durable material to protect them from weather and foot traffic. The mats were connected to reader units, which controlled the antennas and decoded the signals from the tags. The reader units were connected to computers, which logged the identification numbers and timestamps . |
When a runner crossed the mat, the sequence was almost instantaneous. The mat's antennas generated a magnetic field. The tag's coil entered this field and induced a current. The chip powered up and transmitted its identification number. The mat's antennas received the signal. The reader decoded the number and passed it to the computer. The computer matched the number to a runner's name in a database and recorded the time. |
The system had to handle multiple tags in the field simultaneously. This is a challenge in any RFID application. If two tags respond at exactly the same moment, their signals can collide. ChampionChip's low-frequency system used a technique called time division multiplexing to manage this. Tags were activated one after another in rapid succession, so that only one tag transmitted at a time. The process was fast enough that even a dense pack of runners crossing the mat together would be read in a fraction of a second. |
One of the most important features of the ChampionChip system was its ability to capture start times. In a mass start race, runners at the back of the pack might take several minutes to reach the start line. With manual timing, their official time would be measured from the gun, not from when they actually crossed the start. This put them at a disadvantage. ChampionChip solved this problem by placing a mat at the start line as well as the finish line. Each runner's time began when they crossed the start mat, not when the gun fired. This 'net time' was more fair and more accurate . |
The system also enabled intermediate timing. Mats could be placed at any point along the course. At the 10K mark, the half marathon point, or any other location, runners' times would be recorded automatically. This gave runners more detailed feedback about their race and allowed spectators to track their progress. It also helped prevent cheating. If a runner failed to cross an intermediate timing mat, it was evidence that they had cut the course . |
The cheating prevention aspect turned out to be one of ChampionChip's most valuable features. Marathon cheating has a long and colorful history. The most famous case was Rosie Ruiz, who won the 1980 Boston Marathon by taking the subway for most of the course and emerging to run only the last mile . With ChampionChip, such a feat would be impossible. The absence of intermediate reads would immediately expose the cheat. In the 1996 Rotterdam Marathon, ChampionChip caught eighty-one cheaters among a field of eight thousand five hundred runners . |
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The Shift to UHF and Disposable Tags |
ChampionChip's low-frequency technology dominated race timing through the 1990s and into the 2000s. But it had limitations. Low-frequency tags had a short read range, which meant runners had to pass directly over the mat. If a runner's shoe missed the mat or if the tag was not positioned correctly, the read could fail. The tags were also relatively expensive, which is why they were rented or purchased rather than given away. Renting required a deposit and a collection process that added logistical complexity to races . |
In 2005, a new generation of RFID timing technology emerged. This new approach used ultra-high frequency, or UHF, RFID, operating at around 860 to 960 MHz, in accordance with the ISO 18000-6C standard, also known as EPC Gen2 . UHF tags had a longer read range, typically several meters. They were cheaper to manufacture. And they could be made thin and flexible enough to be integrated into a race bib. |
The shift to UHF was pioneered by companies like ChronoTrack, founded in 2006. ChronoTrack introduced the D-tag, a disposable timing tag attached to the runner's bib . The runner did not need to return the tag. They could simply throw it away after the race. This eliminated the deposit and collection process entirely. The Marine Corps Marathon adopted the D-tag in 2008, replacing ChampionChip . |
The UHF system worked differently from the low-frequency ChampionChip. Instead of a mat that the runner had to run directly over, UHF timing systems could use overhead antennas or side-mounted portals. The tag on the bib would be read as the runner passed through the portal. This allowed for more flexibility in course setup. It also meant that runners did not need to worry about their shoe tag being read. The tag was on their chest, where it was more consistently exposed to the antennas. |
ChampionChip itself did not disappear. In 2008, ChampionChip merged with AMB i.t., a Dutch company that specialized in timing for motorsports, to form MYLAPS Sports Timing . MYLAPS continued to support existing ChampionChip users while developing new UHF-based systems like the BibTag, introduced in 2010 . The BibTag integrated the timing chip into the race bib, eliminating the need for a separate shoe chip entirely. By 2019, the Berlin Marathon, one of the world's major marathons, was still using MYLAPS ChampionChip technology for its timing, a testament to the durability of the original system . |
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Beyond Marathons: The Spread of RFID Timing |
Race timing was the first high-profile application of passive RFID for tracking people at speed, but it was far from the last. The success of ChampionChip demonstrated that RFID could reliably identify individuals in motion, without line of sight, in chaotic environments. This insight opened the door to a wide range of applications across sports, entertainment, and industry. |
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Triathlons and Multi-Sport Events |
Triathlons presented a more complex timing challenge than road races. A triathlon involves swimming, cycling, and running, often in different locations. The transition between sports, where athletes change gear, adds another timing point. RFID systems were adapted to handle all of these stages. Mats were placed at the swim exit, at the bike mount and dismount lines, and at the finish. Timing chips were worn on ankle bands or attached to bike frames . The challenge of reading a tag on a swimmer's ankle as they emerge from the water required tags that could withstand immersion and still be read reliably. Modern triathlon timing systems use UHF tags that are waterproof and can be read through water to some extent. |
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Cycling and Motorsports |
Cycling races, from road races to mountain bike events to track cycling, adopted RFID timing as well. The challenge here was different. Cyclists move much faster than runners, sometimes exceeding sixty kilometers per hour. They also pass timing points in tight packs, with many riders crossing within a fraction of a second. UHF RFID systems proved capable of handling these speeds. The longer read range of UHF meant that antennas could be mounted on the side of the road or overhead, giving the reader more time to capture each tag as the cyclist passed through the field. |
Motorsports adopted RFID timing for similar reasons. Rally cars, motorcycles, and even race cars could be equipped with RFID tags that were read as they passed timing points. The technology was rugged enough to survive vibration, heat, and weather. |
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Winter Sports |
Skiing and snowboarding races presented another set of challenges. Cold temperatures can affect the performance of RFID tags, and snow and ice can interfere with signals. But RFID systems were adapted for winter sports as well. Skiers wore tags on their boots or bibs, and mats or portals were placed at the start and finish. Cross-country skiing, in particular, benefited from RFID timing because races often involve multiple laps and mass starts, where manual timing would be impossible. |
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Obstacle Course Races and Adventure Races |
The rise of obstacle course races like Tough Mudder and Spartan Race created new demand for RFID timing. These events combine running with obstacles like mud pits, walls, and water crossings. The tags had to survive mud, water, and physical abuse. Ankle bands and wristbands became common form factors because they were secure and could withstand the elements. Timing mats were placed at the start, finish, and sometimes at obstacle checkpoints. |
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Theme Parks and Entertainment |
RFID timing found applications beyond traditional sports. Theme parks and trampoline parks began using RFID wristbands to track guests and manage play time. At Altitude Trampoline Park, for example, children wear RFID wristbands that track their location, measure their jumping activity, and display their performance on a leaderboard . The system also helps parents keep track of their children and alerts staff if a child tries to leave the facility without a parent . This is a direct descendant of the race timing concept: identifying individuals in motion, in real time, without requiring them to stop. |
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Corporate and Mass Participation Events |
RFID timing has also been used for corporate events, charity walks, and mass participation events of all kinds. Any event where large numbers of people need to be tracked and timed can benefit from RFID. The technology has become so affordable and reliable that even small local races can now offer chip timing. A twenty-thousand-runner marathon can be timed for less than two dollars per runner . |
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The Technical Legacy |
The race timing application of the 1990s had a profound influence on the broader RFID industry. It demonstrated that passive RFID could work reliably in challenging conditions. It proved that the technology could scale to thousands of simultaneous users. And it showed that consumers would accept wearing an RFID tag if it provided a clear benefit. |
The technical challenges that race timing solved are the same challenges that RFID faces in many other applications. How do you read multiple tags in the same fieldHow do you ensure reliability when tags are movingHow do you make tags small enough and cheap enough to be disposableHow do you integrate RFID into existing workflows without disrupting them |
The answers that ChampionChip and its successors developed became foundational knowledge for the RFID industry. The use of mats with embedded antennas, the development of protocols for handling tag collisions, the shift from low frequency to UHF for longer range and lower cost: these innovations were driven in part by the demands of race timing. |
The race timing industry also demonstrated the importance of standards. The early ChampionChip system was proprietary. Chips from one timing system were incompatible with another . As the industry matured, the adoption of the ISO 18000-6C standard for UHF RFID allowed for greater interoperability. Runners could use the same disposable tag at different races. Timing companies could use off-the-shelf RFID components rather than building everything from scratch. |
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Conclusion: The Chip That Changed Everything |
The 1990s were a pivotal decade for RFID. The technology had existed for decades, but it had not yet found its killer application. Race timing provided that application. ChampionChip, born in 1993 from the frustration of a Dutch race director, showed the world that passive RFID could do something that barcodes could not: identify people in motion, at speed, without line of sight. |
The yellow ChampionChip became an icon of the running boom. It was the first interaction many ordinary people had with RFID technology. It gave them a net time, a split at the half marathon, and confidence that their race result was accurate. It also caught cheaters and made mass participation events manageable. |
But the legacy of race timing extends far beyond marathons. The technical innovations developed for timing runners were applied to cyclists, skiers, triathletes, and obstacle course racers. They were adapted for theme parks, trampoline parks, and corporate events. They influenced the broader RFID industry, driving improvements in tag design, reader sensitivity, and standards compliance. |
The silent network of RFID, which would eventually map the physical world in ways far beyond what anyone in 1993 could have imagined, took one of its first major steps at the finish line of a marathon. A runner crossed a mat. A chip in their shoe transmitted a number. A computer logged a time. And the world quietly learned that radio waves could see what light could not. |
cs@easiersoft.com