SU892415A1

SU892415A1 - Period measuring device

Info

Publication number: SU892415A1
Application number: SU802912395A
Authority: SU
Inventors: Владимир Андреевич Мамонов; Оксана Вионоровна Малютина
Original assignee: Предприятие П/Я Р-6609
Priority date: 1980-04-21
Filing date: 1980-04-21
Publication date: 1981-12-23

Description

(54) УСТРОЙСТВО ДЛЯ ИЗМЕРЕНИЯ ПЕРИОДА(54) DEVICE FOR MEASURING PERIOD

1one

Изобретение относитс к измерительной технике и может быть использовано в устройствах дл измерени периода сигнала, а также в качестве релаксационного генератора.The invention relates to a measurement technique and can be used in devices for measuring the period of a signal, as well as a relaxation generator.

Наиболее близким к предлагаемому по технической сущности вл етс частотомер , содержащий входной трансформатор , два резистора, два конденсатора , пороговый элемент, инвертор, диод и блок индикации 1.The closest to the proposed technical entity is a frequency meter containing an input transformer, two resistors, two capacitors, a threshold element, an inverter, a diode, and a display unit 1.

Недостаток этого устройства состоит в том, что необходимо использоват| квантовый генератор, что усложн ет и повьппает стоимость устройства.The disadvantage of this device is that it is necessary to use | quantum generator, which complicates and increases the cost of the device.

Цель изобретени - упрощение устройства за счет использовани принципа самоквантовани без-преобразовани измер емого сигнала в сигнал щ моугольнрй формы.The purpose of the invention is to simplify the device by using the principle of self-quantizing without converting the measured signal into a signal of a rectangular shape.

Эта цель достигаетс тем, что в устройство дл измерени периода, содержащее входной трансформатор,. первична обмотка.которого соединена с входными шинами, вторична обмотка трансформатора выполнена со средним отводом, подключенным к общей шине, концы вторичной обмотки трансформаJTOpa соединены с первыми выводами первого и второго резисторов, инвертор , выход которого подключен ко входу блока индикации, пороговый элемент , два конденсатора и диод, введены оптронный ключ и два резистора, причем второй вывод первого резистора соединен через первый конденсатор с общей шиной и непосредственно с инверсным входом порогового элемента , выход которого через последова10 тельно соединенные третий резистор, оптронный ключ и инвертор подключен к катоду диода, анод которого соединен с пр нфлм выходом порогового элемента непосредственно, с общей шиной - через второй конденсатор и через четвертый резистор - со вторым выводом второго резистора.This goal is achieved in that a period measurement device comprising an input transformer. the primary winding.which is connected to the input buses, the secondary winding of the transformer is made with an average tap connected to the common bus, the ends of the secondary winding of the transformer JTOpa are connected to the first terminals of the first and second resistors, the inverter whose output is connected to the input of the display unit, the threshold element, two capacitors and a diode, an optocoupler switch and two resistors are inserted, the second output of the first resistor being connected via the first capacitor to the common bus and directly to the inverse of the threshold element, output d is connected through posledova10 Tel'nykh third resistor optocoupler key and an inverter connected to the cathode of the diode, the anode of which is connected to the direct output nflm threshold element directly to the common bus - via a second capacitor and via a fourth resistor - to a second terminal of the second resistor.

На чертеже показана функциональна схема устройства дл измерени The drawing shows the functional diagram of the device for measuring

20 периода.20 period.

Устройство содержит резисторы 1-4, входной трансформатор 5, вторична обмотка которого через резисторы 2 и 4 сое,цинена с первым входом The device contains resistors 1-4, the input transformer 5, the secondary winding of which through the resistors 2 and 4 soy, zinen with the first input

25 порогового элемента 6, а через резистор 1 с инверсным входом порогового элемента 6, который подключен к общей шине через конденсатор 7, Пр мой вход порогового элемента 6 через конденсатор 8 соединен с общей25 of the threshold element 6, and through a resistor 1 with the inverse of the input of the threshold element 6, which is connected to the common bus through the capacitor 7, the direct input of the threshold element 6 through the capacitor 8 is connected to the common

Claims

30 ishichnaya, and through diode 9 with the output of inverter 10, the output of aoric element 6 through series-connected resistor 3, the optocoupler switch 1, inverter 10 is connected to the input of display unit 12. The device works as follows. The measured voltage is applied to the primary winding of the transformer 5, the secondary winding of which is connected to the threshold element 6 (a voltage comparator is used as the threshold element 6) through resistors 2 and 4 and a capacitor 8 At the time of a positive voltage at the top point of the secondary winding of the transformer 5, the capacitor 8 is charged through resistors 2 and 4 to a level equal to the trigger threshold of the threshold element b, the inverse input of which is grounded to the variable component by means of the capacitor 7. The threshold el The voltage b is triggered and, from its output through the resistor 3, the voltage is applied to the input of the optical key 11, which has a delay () of several tens of nanoseconds. When the voltage becomes equal to the threshold of the optocoupler switch at its output after a time equal to the voltage corresponding to the logical one. This voltage is inverted by the inverter 10, the output of which is connected to the voltage corresponding to this moment, and the discharger 8 begins to discharge through the resistance of the diode 9 and the inverter 10. When the capacitor 8 is discharged to zero, the output of the threshold element b the voltage of the mills equals zero, the optocoupler switch 11 goes out, and at its output the voltage also assumes a value equal to zero, and the output of the inverter 10 produces a voltage equal to logical 1, which closes the diode 9. Capacitor B again charged chained; common bus-resistor 2-resistor 4-capacitor b-common bus. When the input signal is positive, the process repeats at a frequency that is determined by the resistance of resistors 2 and 4, the capacitance of capacitor 8 and the delay time of the optocoupler switch 11. Thus, the number of quanta appears at the output of the inverter -11 FROM the period of the input signal and the repetition rate of the above process. Quantum signal flow from the input unit 12 of the display. The proposed device allows one to measure the duration of not only a periodically repeating, from an analog and discrete signal, but also single processes, for example, a single noise. When a resistor 2 is connected to the positive terminal of a power source, this circuit can operate in a relaxation generator mode, the period of which is determined by the same resistance value of resistors 2 and 4, the capacitance of the capacitor 8 and t ass. about. i. Using a generator together with a divider and a bandpass filter at the input of a communication channel, if a loop is installed at the opposite station and the proposed period measurement device is turned on at the channel output, it makes it possible to measure period instability caused by parasitic effects in the channel connection with a sufficiently high accuracy, since the generator and the device for measuring the period of the signal are made on the same elements and are in the same conditions. The invention allows, when measuring the instability of the period of a signal in a channel, to follow sharp changes in the period. Claim device The device for measuring the period containing the input transformer, the primary winding of which is connected to the input busbars, the secondary winding of the transformer is made with a middle tap connected to the common bus, the ends of the secondary winding of the transformer are connected to the first terminals of the first and second resistor, an inverter whose output is connected to the input of the display unit, a threshold element, two capacitors and a diode, characterized in that, in order to simplify the device, an optocoupler key and two resistors are inserted into it, the second terminal of the first resistor is connected via the first capacitor to the common bus and directly to the inverse of the threshold element, the output of which is connected through the third resistor, the optocouplers and the inverter connected in series to the cathode of the diode, the anode of which is directly connected to common bus through the second capacitor and through the fourth resistor with the second output of the second resistor. Sources of information taken into account during the examination 1. Technical description of the frequency meter 43-36 EE2.721.085 (prototype).