SU873257A1 - Device for skier descent time recording - Google Patents

Description

one

The invention relates to sports equipment and is used in training and competition to determine the speed of an athlete on the mountain acceleration of a ski jump.

A device for registration of the finish line, skaters, containing time interval meters, photo sensors, photo relays and fl.

The disadvantage of this device is small accuracy in the case of recording the time of the skier's run due to false positives on the movement of the skier's poles.

The closest to the proposed technical entity is a device for measuring the speed of a skier on a springboard 2, which is a finish recorder consisting of two crossing signal drivers, each of which contains a light source, and a light receiver located on the same horizontal light source. , I turn on the sensitive element and the threshold device, the output of the first driver connected Q to the first (triggering or starting) input of the time interval meter, and the output of the second forming Ate - to the second.

(stopping, reading or finishing) input of the time interval meter. The light rays of the formers are located at a given distance S from each other at a right angle to the ski track and at a fixed height above it on the mountain of acceleration of the springboard. Skier during the descent crosses the tibia first first (starting)

10 light beam and includes a time meter. After some time t, the athlete's shin crosses the second (finishing) light beam and stops the time interval meter. Then make a simple calculation; you can determine the speed V of the skier on the s made segment S using the formula

(one)

S / t

20

The disadvantage of the device under consideration is its low accuracy and reliability.

The purpose of the invention is to improve the accuracy and accuracy of the device.

This goal is achieved by the fact that a skier containing the first and second photosensors installed at the descent control points is recorded in the device for recording the time of the skier's descent.

threshold elements, the first inputs of which are connected to photo sensors, a time interval meter whose inputs are connected to the outputs of threshold elements, photo sensors are installed in the ski track and the zone of action of each photo sensor is perpendicular to the athlete's plane of motion.

In addition, in order to improve the recording accuracy under different weather conditions, the third and fourth photosensors, located at the level with the first and second photosensors, respectively, are introduced perpendicular to the athlete’s plane of motion

The body through the spring-loaded element and the travel stop is connected to the base.

On. FIG. 1 shows a block diagram of the device in FIG. 2 - location of the hull relative to the ski track, installed at the control point.

A device for registering the time of the descent of the skier contains a meter. time interval 1 and located on the ski run 2 on the mountain 3 acceleration at a given distance from each other and fixed depth relative to the level of the track 2 receivers 4 lights located in housing 5 and containing threshold elements b and photo sensors 7. In the working (upper) surface of the case 5 opposite the photosensors 7 are made of windows 8, which can be protected by an optically transparent material, for example, glass 9. In the receiver 4 of the light, the photosensors 7 are connected to the inputs of the threshold element 6 directly or through a preliminary rer. The output of the first receiver 4 of the light is connected to the first (triggering or starting) input of the time interval meter 1, the second (stopping, reading or finishing) input of which is connected to the output of the second light receiver 4. The working (top) plane of the hull 5 (see Fig.2) is located on the same level with the track 2. Windows 8 and therefore the photosensors 7 are located on the start line, the finish line. A protective sleeve 10 is attached to the housing 5, inside of which is located a spring 11, one end of which is clamped into the housing 5, and the other end into the retaining ring 12, mounted on the screw 13, passed through the hole 14 in the housing 5 and fixed} 15.

The device works as follows.

In the initial state, daylight (used as a light source) even through a layer of snow illuminates photo sensors 7 in both receivers 4 lights. In the proposed device in each receiver 4 light voltage is on. the second input of the threshold element b

the automaton 1 is set by another photo sensor 7, which is in exactly the same conditions (or close enough to them) as the first photo sensor 7. Therefore, the conditions for triggering the threshold element b change little (or not at all) during the day of the competition. Consequently, in any case of the athlete’s passing the length of the path, the result of each passage is recorded on the display unit of the time interval meter 1. The upper (working) plane of the body 5 of any light receiver can be installed at one level outside with the level of the ski track to avoid the influence of the snow layer. In this case, the threshold element b can be performed more simply (its sensitivity is required less).

However, during the day of the competition or training, the weather may change (for example, a thaw), ski 2 will melt and precipitate, and building 5 will therefore perform above ski track 2 and interfere with the athlete’s skiing. When using the spring-loaded body 5, this drawback is eliminated, since the body 5 under the weight of the ski is recessed to the level of the ski 2 and does not: interfere with the skiing of the athlete on the track. In any day of competition or training, the working plane of hull 5 is leveled with the level of track 2 with screw 13.

The economic effect of using this device is determined by an increase in accuracy and reliability.

Claims (3)

1. A device for recording the time of the skier's descent, comprising a body, first and second photosensors installed at descent control points, threshold elements, the first inputs of which are connected to photosensors, a time interval meter, whose inputs are connected to the outputs of threshold elements, characterized in that in order to improve the accuracy and quality of the device, photo sensors are installed in the ski area and the zone of action of each of the photo sensors is directed perpendicularly to the plane of motion of the athlete. 2. The device according to claim 1, about t l and -. This is because, in order to increase the recording accuracy under different weather conditions, the third and fourth photosensors are introduced into it, which are located at the level of the first and second photosensors, respectively, perpendicular to the athlete's plane of motion. 3. The device according to claim 1, about t l and that the case