Hello dear readers. This article will be a continuation of the conversation about the systems of sports timing and timing in general. But now I would like to delve into the "iron" part of this process. So:
In general, the timing and timing of the athlete involves attaching to the athlete some electronic device (hereinafter referred to as the "chip" as used in the sports community) to fix the time and identify the athlete. those. The chest number or the number of the device itself, which is then attached to the athlete in the database.
If you roughly break down all the timing systems, you will get two categories: active systems and passive systems .
There are many differences, but the most important is the presence or absence of a power source in the chip.
Let's talk a little about these two systems in more detail.
Passive system as you might guess from the name, does not contain a power source in the chip. To make the chip work, it needs to transfer energy "through the air." This is the main problem of this system and the associated difficulties. To activate the chip and transmit energy to it, it is necessary to use expensive high-purity antennas.
It was about this system that we talked about in the previous article.
What are the advantages of using it?
Since the chip does not have a power source, it is a sticker on which the antenna and the microcircuit are located. It is commercially produced tags similar to cards in the subway only on the purity of 860MHz. Accordingly, their main plus is the price and this is the reason for the general application of this system.
Looking ahead, I will say that there is a downside to the medal – the high cost of the receiving equipment. Its scope and the need to actually design a chip detection zone for each event.
Another plus from the price of the chip can be attributed to the fact that after the event it is not necessary to organize the collection of these chips, i.e. They remain with the athlete, since they are usually attached to the back of the breastplate.
Cons: accuracy and detection percentage. The honest accuracy of such systems is limited to 1 sec. The detection rate when installing one detection line 95%, in order to increase the percentage, timekeepers are offered to put either a duplicating line or to attach two chips to each athlete and still it will not give a 100% guarantee that the chip will be caught. Even large running events of 50,000 people share information about passes in 0.1% of the total.
I am convinced that it is advisable to apply such systems for events where it is actually not possible to use active systems, and, in general, no others because of the number of participants, For our reality this is 2000 participants or more. Activities are less I think should pass with active systems.
This is a more perfect and suitable system for determining the time of the athlete. We all see it in action on TV, at competitions in biathlon for example.
The chip looks like a portable device, fixed as a rule on the foot of an athlete. This is due not only to the convenience of fastening, but also to the accuracy of time fixation.
Pros are obvious here: accuracy – honest 0,1 sec (depends on the sport, or rather on the speed of crossing the line). For accuracy greater than one hundredth of a second it is necessary to use optical means, in the common people "ray."
Cons: price … the price of such a system is very decent: the chip on average costs 40-60. The activation equipment is slightly cheaper than the passive systems. Well, the organizational disadvantage is that such chips must be given out to the athletes and collected, which actually limits the use of the system in very large events.
This is briefly about the variants of "iron" for the organization of sports timing.
About 5 years ago I started building a passive timekeeping system, and my colleague @Surzhikov described it in detail in the previous article. Having gone a long way and served a fairly large number of large and not very events, 1.5 years ago we came to the conclusion that there must be an active system in the arsenal of a professional timekeeper. Just like before, we did not buy a ready-made solution, but started to develop an active system ourselves. About this, and in general about the active system in more detail, I think that I will write a separate article, in which I will describe in detail the fascinating process of creating a system, from idea to device.