Brittney Reese just won gold in the long jump on her final jump.
I was horrified because they started sweeping away her mark before I saw them measure it. It looked like she had gone far enough for the win.
Turns out this is the first worlds that somehow they are measuring with lasers or something underneath the sand. I assume people way smarter than me have tested this thing and it is super accurate.
Anyone know how this works?
At a high school meet I was at a couple weeks ago, they pointed a laser from the side and read the distance in meters. Luckily a guy had a conversion paper and he would post the distance in ft and inches so all the people watching would be able to understand how far the jump was. Must have been one of those foreign lasers.
1.) Congratulations Brittney! Her accomplishments often go relatively underpublicized.
2.) It alarms me that the measuring is being done this way. I feel like results can easily be manipulated or mis-recorded. Just wait for the long jump scandal where somebody jumps 8.96m, but computer sensors record it as 8.66m, and it's never ratified as a WR.
It's not under the sand. Surveyors have been measuring like this for years. I was actually surprised it took track this long to catch up. You can see them holding up the stick that catches the laser from the board. You can find the equipment for a couple grand on any site like mf.
I know that distance people are highly unintelligent and out of touch with the modern world, and this is an example. Not only does laser measuring equipment exist, but it can be bought right out of a catalog and within the budgets of maybe even high school teams. It is a standard product by Gill and others:
http://www.everythingtrackandfield.com/webapp/wcs/stores/servlet/Product1_10152_10753_2004942_-1
Technology wrote:
It's not under the sand. Surveyors have been measuring like this for years. I was actually surprised it took track this long to catch up. You can see them holding up the stick that catches the laser from the board. You can find the equipment for a couple grand on any site like mf.
Did you actually watch the meet? There is no one holding up a stick. I've never seen anything like this before either, and I've seen plenty of people measure with a hand held laser. This is something different.
i spent the whole dang evening trying to figure it out. there were some fancy cameras set up next to the pit, but i'm 99% sure they were just regular cameras because they were set up on simple tripods at at a low angle.
i did see a surverying tool (total station probably or some form) nearby, pointing in the direction of the sand pit. didnt look like it was pointed perfectly at 7m or whatever, but i didnt get up close to check. i don't know how a total station could get a reading from just a divot in the sand. i know you can set up a TS to automatically measure stuff, but not in this way.
somebody please help us out
wejo wrote:
Anyone know how this works?
Trigonometry is your friend. It's been around for two thousand years.
To anewer the question.
I believe the question is how does this system identify the exact landing spot. . We all have seen the official put the stick in the sand --they used that system in this meet for the snot putt- but how does this system identify the closest spot to the board with out human aid. If there was an automated rake that made the sand 100% level, even and smooth a beam could be pointed at the first point lower than level in the sand. From what I saw the pit was hand raked and broomed surely not perfectly level and smooth.
So the question:
For trigonometry to work the third non-stationary point has to be accurately identified. How is that done? Saying "they do it by laser" is not explicit enough for this crowd.
metron is the root wrote:
So the question:
For trigonometry to work the third non-stationary point has to be accurately identified. How is that done? Saying "they do it by laser" is not explicit enough for this crowd.
This crowd prefers to tell you to google it or to buy it. Arrogance compensates for lack of brains.
Check the USATF link provided by lmgtfy
eotbs wrote:
1.) Congratulations Brittney! Her accomplishments often go relatively underpublicized.
2.) It alarms me that the measuring is being done this way. I feel like results can easily be manipulated or mis-recorded. Just wait for the long jump scandal where somebody jumps 8.96m, but computer sensors record it as 8.66m, and it's never ratified as a WR.
Don't worry. I am fairly certain the rules still say that all Records have to be certified with a steel tape. If that ever comes up, they just get out the Steel Tape and measure it again before they clear the sand away.
Debuted in Daegu, 2011
http://www.iaaf.org/news/feature/seiko-athletics-technology-world-champs-2015
You Brojos are very diverse and should feel proud of your worldliness for watching the LJ finals at a Worlds championship. However, maybe you should get out from under a rock and watch it more often. Laser measuring has been around for a while at the collegiate and high school level throughout the country. Get more well rounded please. You sound as ignorant as Ato B and Tomm Hammond yapping about Powell and Collins before the 60m last night and completely ignoring the 3 Americans. Then acting like they just discovered, confirmed and approved that Brommell is the future of US sprinting. Good grief.
Amazon has one for $3,000 or I could buy a tape measure for 20 bucks.
Frank Hardy wrote:
Debuted in Daegu, 2011
http://www.iaaf.org/news/feature/seiko-athletics-technology-world-champs-2015
Thank you! I can tell who actually watched the competition and who in this thread has no idea what they are talking about. It looks like it doesn't use lasers at all...
The system, which made its World Championship debut four years ago in Daegu, uses stereophonic cameras to capture the landing area for the long and triple jumps, which are calibrated in advance of the event. For each attempt, images are created and used to identify the precise landing point in the sand.
eotbs wrote:
1.) Congratulations Brittney! Her accomplishments often go relatively underpublicized.
2.) It alarms me that the measuring is being done this way. I feel like results can easily be manipulated or mis-recorded. Just wait for the long jump scandal where somebody jumps 8.96m, but computer sensors record it as 8.66m, and it's never ratified as a WR.
No need to be alarmed, I'm sure some clever engineers working for Seiko have made this system more accurate than an old bloke guessing where to put his stick...
I think it is time to do away with the long jump board altogether. Now with lasers and such, they can just measure the true distance of the jump from start to finish. Just have a one meter area that the jumper has to take off from. Getting rid of all those fouls would make the sport more exciting.
Jumpers could just make a few jumps anytime and send the video in that could be analyzed for distance. That would cut down on a lot of travel expense.
Longrunner4 wrote:
I think it is time to do away with the long jump board altogether. Now with lasers and such, they can just measure the true distance of the jump from start to finish. Just have a one meter area that the jumper has to take off from. Getting rid of all those fouls would make the sport more exciting.