SU964536A1

SU964536A1 - Rotational speed transducer

Info

Publication number: SU964536A1
Application number: SU803211524A
Authority: SU
Inventors: Евгений Михайлович Казанцев; Роман Владимирович Дзядык
Original assignee: Львовский Ордена Ленина Политехнический Институт Им.Ленинского Комсомола
Priority date: 1980-12-03
Filing date: 1980-12-03
Publication date: 1982-10-07

Description

Изобретение относитс к приборостроению и может быть использовано в системах автоматического регулировани скорости врёицени . °This invention relates to instrumentation engineering and can be used in automatic speed control systems. °

Известен датчик скорости вращени , формирующий импульсы, частота которых пропорционгшьна скорости flj.A rotation speed sensor is known that generates pulses whose frequency is proportional to the speed flj.

Однако датчик не обеспечивает достаточной точности при измерении низких скоростей вращени .However, the sensor does not provide sufficient accuracy when measuring low rotational speeds.

Наиболее близким к изобретению вл етс устройство дл преобразовани угла поворота вала в цифровой код, содержащее генератор импульсов, выход которого делитель частоты , формирователь синусоидальных напр жений , фазовращатель, ротор которого св зан с 1|сследуемым объектом, соединен с формирователем 2J.Closest to the invention is a device for converting an angle of rotation of a shaft into a digital code comprising a pulse generator, the output of which is a frequency divider, a sinusoidal voltage driver, a phase shifter, the rotor of which is connected to a 1 | trace object, is connected to a 2J shaper.

Недостатком устройства вл етс невозможность получени частотно-импульсного сигнала, пропорционального скорости вращени .The drawback of the device is the impossibility of obtaining a pulse frequency signal proportional to the speed of rotation.

Целью изобретени вл етс расширение функциональных возможностей за счет получени частотно-импульсного сигнала, пропорционального скорости вращени .The aim of the invention is to enhance the functionality by obtaining a pulse frequency signal proportional to the speed of rotation.

Поставленна цель достигаетс тем, что в датчик введены три одновибратора , два логических элемента И и триггер, причем выход формировател через первый одновибратор подключен к первым входам логических элементов И, выходы которых св заны с установленными входами триггера, а вторые входы - с выходами второго и третьего одновибраторову подключенных к выходу генератора импульсов.The goal is achieved by introducing three single vibrators into the sensor, two AND logic elements and a trigger, the output of the driver through the first single vibrator connected to the first inputs of the AND logic elements, the outputs of which are connected to the set trigger inputs, and the second inputs to the second and the third one-shot connected to the output of the pulse generator.

10ten

На фиг. 1 приведена схема датчика скорости вращени , на фиг. 2 временные диаграммы его работы.FIG. 1 is a diagram of a rotational speed sensor; FIG. 2 time diagrams of his work.

Датчик содержит генератор 1 импульсов , выход которого через дели15 тель 2 частоты, формирователь 3 синусоидальных напр жений, фазовращатель 4, формирователь 5 пр моугольных импульсов подключен к входу первого, одновибратора 6. Выход одновибрато20 ра 6 подключен к первым входсш двух логических элементов И 7 и 8, вторые входы которых раздельно подключены к выходам второго и третьего одновибраторов 9 и 10, подключенных по The sensor contains a pulse generator 1, the output of which is through a frequency divider 2, a sinusoidal voltage shaper 3, a phase shifter 4, a square pulse shaper 5 connected to the input of the first, one-shot 6. The one-shot output 6 is connected to the first input of two logic elements I 7 and 8, the second inputs of which are separately connected to the outputs of the second and third single vibrators 9 and 10, connected via

Claims

25 input to the output of the generator.1 pulses. The outputs of logic gates And 7 and 8 are connected to the inputs of the separate installation of the trigger 11, one of the outputs of which is the output of the sensor. The sensor works as follows. The output voltage of the phase shifter (Fig. 2a) after the former 5 is supplied to the first one-shot and at the time of going through the zero position it starts the one-shot 6 (figure 2a). The single vibrators 9 and 10 (Fig. 2c and d) are triggered, respectively, by the positive and negative differential impulses of the generator 1 (Fig. 2b). At the moment of time t t t, the pulse of the one-shot 9 (Fig. 2a) coincides with the pulse of the one-shot 6 (Figure 2d) and at the output of the element 7 a coincidence pulse is formed (ph-g. 2e), which converts the trigger 11 into a single state (Figure .2 Thus, the leading edge of the output pulse is formed. If at the time t t t the rotor of the phase shifter rotates by an angle smaller than the phase distance between the one-shot pulses 9 and 10, then there will be no coincidence on elements 7 and 8 , and trigger 1 will remain in a single state. Let at time tj 13 roto f The angler turned by an angle equal to the phase distance between the pulses of the single vibrators 9 and 10. In this case, a coincidence pulse is generated at the output of element 3 (FIG. 2g which sets trigger 11 to the zero state, as a result of which When the rotor rotates 360, k matches will occur (where k is the division ratio of the divider 2) pulses of one-shot 9 and 10 with pulses of the one-shot 6, and K pulses will be generated at the output of trigger 11. Since the rate of change in the phase of the output signal is proportional to the speed of rotation, then the frequency of the pulses will be proportional to the speed. DETAILED DESCRIPTION OF THE INVENTION A rotational speed sensor comprising a pulse generator, the output of which through a frequency divider, a sinusoidal voltage driver, and a phase shifter, the rotor of which is connected to the object under study, is connected to the pulse driver, ex. This is due to the fact that, in order to expand the functionality by receiving a frequency pulsed signal proportional to the rotational speed, three single-vibrators, two logical gates And a flip-flop are inserted into it, and the driver’s output through the first single-oscillator is connected to the first inputs of logic gates And, the outputs of which are connected to the installation inputs of the trigger, and the second inputs to the outputs of the second and third one-vibration connected to the output of the pulse generator. Sources of information taken into account in the examination 1. D. Ageykin. et al. Sensors of control and regulation, M., 1965, p. 467,

2. Drozdov EA, and P tibratov A; P. Automatic conversion and encoding of information. M., Energie, 1964, p. 208 (prototype). Fig t,