SU1193706A1 - Device for registering motion time of sportsmen - Google Patents

Abstract

1. DEVICE FOR REGISTRATION OF TIME OF MOVEMENT OF ATHLETES, containing a start pulse shaper, the output of which is connected to the information input of the memory unit, the output of which is connected to the input of the display unit, the encoder, the output of which is connected to the address input of the memory unit, and the sensor The position set in the finish area of the athletes, characterized in that, in order to improve the accuracy of the device, a pulse generator, a pulse distributor and receivers are entered according to the number of athletes s, pulse formers, memory elements and transmitters mounted on athletes, the position sensor being designed as a loop antenna, the outputs of which are connected to the receiver inputs, the output of each of which is connected to the information input of the corresponding memory element which outputs are connected through the corresponding pulse generator with the inputs of the encoder, and the output i of the pulse generator through the pulse distributor is connected to the read inputs of the TL of the memory elements. co

Description

2. A device according to claim 1, characterized in that each pulse generator comprises a comparator, a differentiating element and an element, the combined inputs of the first comparator and the differentiating element being the input of the pulse former, the output of the differentiating element is connected to the input of the second comparator, and the outputs of the comparator are connected to the inputs of the AND element whose output is the output of the pulse former.

The invention relates to automation, to devices for measuring the time of sports competitions and can be used for judging competitions in athletics and a number of other sports.

The aim of the invention is to improve the accuracy of the device.

Figure 1 shows the block diagram of the proposed device; figure 2 is a functional diagram of the pulse generator.

The device contains a starting pulse shaper 1, a time interval meter 2, a memory block 3, a display unit 4, memory elements 5, an encoder 6, a pulse generator 7, a pulse distributor 8, a position sensor 9 in the form of a loop antenna, receivers 10, drivers 11 pulses and transmitters 12.

The shaper 11 contains the first 13 and second 14 Comparators, differentiating element 15 and element 16.

The device works as follows.

Before the start of the race, all its participants are supplied with transmitters 12 that differ in operating frequencies. Transmitters 12 create signals in the loop antenna 9 that vary in amplitude depending on the relative position of the antenna wires and transmitting antennas attached to the athlete. The maximum amplitude of the signal of a particular transmitter in the antenna is observed when the center of the transmitting antenna on which the transmitter is loaded is located above the central axis of the antenna 9, i.e. above the finish line.

The signals of antenna 9 are amplified and converted in receivers 10 that select signals from transmitters 12. The tuning frequencies of receivers 10 coincide with the operating frequencies of transmitters 12, so the output of each of receiver 10 appears only on its transmitter, and the signals of the remaining transmitters are filtered out thanks to the frequency selectivity of receivers. The output signals of receivers 10 are fed to shapers 11, which perform the functions of fixing the athletes crossing points of the finish line by measuring the time range of signals from receivers 10, observed against the background of random interference in the inductive communication channel between transmitters 12 and receivers 10.

The former 11 generates standard impulses, the temporary position of which corresponds to the passing points of the finish line by athletes, and since it is known in advance which transmitter carries each of the athletes participating in the race, the sequence of appearance of impulses at the outputs of the formers 11 unambiguously determines the final sequence of the athletes.

From the shot of the starting gun, the driver 1 of the start pulses generates a start signal, which triggers the meter of 2 time intervals. The current running time is fed to the information input of the memory block 3. When one of the athletes (or several athletes) crosses the finish line, signals arriving at the information inputs of the memory elements 5 appear at the exits of the respective drivers 11.

The generator 7 generates clock pulses, continuously arriving at the distributor 8 pulses, which in turn will feed to the control inputs of the elements 5 polling pulses. After all the elements 5 are polled, the polling cycle ends and a new polling cycle begins, and the clock frequency of generator 7 is chosen such that the period of the polling cycle is less than the required measurement error of the finishing time, i.e. during the polling cycle time, the current time of the run at the output of the meter 2 time intervals varies.

Elements 5 synchronize the generation of address codes for memory block 3. They memorize the input signals coming from the formers 11 to the moments of arrival of the polling pulses to the control inputs of the elements 5.

At the moment when a polling pulse from the elements 5 arrives at the control input, and if there is a signal from the generator at its information input, a pulse appears at the output, which goes to the encoder 6. This pulse stops at the moment the polling pulse ends and subsequent polling cycles are not repeated.

At the output of the tuner 6, the binary code of the address arriving at the address inputs of the memory block 3 appears, and the current time of the meter 2 timeslots is recorded in the corresponding memory location. representing the result of the finished athlete. The memory cell number and the result of finishing the display on the corresponding line of the display unit 4. Similarly, during the periodically repeating polling of the elements 5, all the remaining memory cells of block 3 are filled, the number of the filled memory cell is determined by the frequency channel number (transmitter 12, receiver 10 and driver 11), from which the next finish pulse was received, which allows unambiguously to identify the result recorded in each cell of memory block 3, since it is known in advance which of the transmitters 12 each of the participants of the race is supplied with. Thus, at the end of the race, a complete picture of the finish is displayed on the display unit 4: the number of the finished athlete (determined by the memory cell number) and the time of the athlete regardless of the presence of the finish group and the number of athletes in the group. The possibility of errors associated with the known finish recorder with the complexity of the measurements at the finish group, in this device is absent. The shaper 11 operates as follows. The main maximum of the output response of the receiver is 10 6 up to the known and

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Figure 2 of a fixed value (receiver's own delay) coincides with the maximum of the signal at the receiver detector output, i.e. corresponds to the athlete at the finish line. The comparator 13 compares the output signal of the receiver 10 with a fixed threshold in order to extract the main maximum of the signal, which makes it possible to exclude rough fixations of the finishing moment. The maximum output signal of the receiver is fixed by differentiating it in element 15 and then fixing the moments of passage through zero of the derivative signal in comparator 14. Signals from the outputs of comparator 13 and 14 are fed to element 16, which generates a signal whose leading edge corresponds to the moment of the athlete finishing. The delay in the occurrence of this signal relative to the true finishing time, which is equal to the receiver’s own delay, can be compensated by the corresponding delay in outputting the start signal to the meter in 2 time intervals. In comparison with the known, the proposed device provides a significant increase in the timing accuracy and identification of the finished athletes.

Claims (2)

1. DEVICE FOR REGISTRATION OF TIME OF MOTION OF ATHLETES, containing a start pulse generator, the output of which is connected through the time interval meter to the information input of the memory unit, the output of which is connected to the input of the display unit, an encoder, the output of which is connected to the address input of the memory unit, and a sensor the position established in the finish area of the athletes, characterized in that, in order to improve the accuracy of the device, a pulse generator, a pulse distributor and receivers according to the number of athletes, pulse reducers, memory elements and transmitters mounted on athletes, the position sensor being made in the form of a loop antenna, the outputs of which are connected to the inputs of the receivers, the output of each of which is connected to the information input of the corresponding memory element, the outputs of which are connected to the encoder inputs, through the corresponding pulse shaper, and the output of the pulse generator through the pulse distributor is connected to the read inputs of the memory elements. Figure 1 R ns 2. The device according to claim 1, characterized in that each pulse shaper contains comparators, a differentiating element and AND element, the combined inputs of the first comparator and differentiating element being the input of the pulse shaper, the output of the differentiating element connected to the input of the second comparator, and the outputs of the comparators connected to the inputs of the element And, the output of which is the output of the pulse shaper.