Sports trainer chronograph for measuring speed during athletics training

We remind you, our dear readers, that about the simulators used in fitness and bodybuilding, you can read it in this section of our website. And you can buy them, for example, in this online store. And in this article we continue to study modern specific simulators for training both professional athletes and beginners in various sports disciplines...

And today we will talk about the so-called chronograph trainer...

A chronograph trainer is a device for measuring the speed of athletes.

The simulator is a training demonstration chronograph with remote control. Its purpose is timing of time spent on various components of the training lesson with subsequent analysis of the data obtained.

The device (Fig. 1) in appearance is a flat parallelepiped measuring 80X70X15 cm, the front side of which serves as a display board. A remote control panel is connected to the chronograph body using a shaker connector using a multi-core electrical cable (the length of the cable can be varied). The basis of the internal structure of the chronograph is a tape mechanism consisting of five independently operating pairs of reels: in each pair, one is leading, the other is driven.

Sets of coils are freely mounted on vertical axes. Each pair of reels is equipped with a paper ring tape with a colored stripe (depending on the lesson component being recorded) and with time graduation accurate to 5 seconds. The speed of the tape is 2 cm per minute. The tape transport mechanism is driven by a DC electric motor. The conversion of alternating current (voltage 220 V and frequency 50 Hz) into direct current is carried out using four semiconductor diodes assembled in a bridge circuit. To reduce the mains voltage to the specified parameters of the electric motor, the chronograph uses a power step-down transformer. The elements of the described device include ten electromagnets: five of them are designed to selectively activate the leading coils (working electromagnets), and the rest are designed to turn off the coils (auxiliary electromagnets). The electromagnets are powered by direct current, converted from alternating mains current using a selenium rectifier and another power step-down transformer.