SU570076A1

SU570076A1 - Device for counting working strokes of press

Info

Publication number: SU570076A1
Application number: SU7602317182A
Authority: SU
Inventors: Анатолий Абович Вулих; Лев Александрович Журавлев; Владимир Михайлович Сенчук; Анатолий Евминьевич Церна
Original assignee: Ростовский Ордена Трудового Красного Знамени Государственный Университет
Priority date: 1976-01-20
Filing date: 1976-01-20
Publication date: 1977-08-25

Description

1one

Изобретение относитс к области техни-ческой физики и может быть использовано дл счета рабочих ходов пресса.The invention relates to the field of technical physics and can be used to count the working strokes of the press.

Известно устройство дл счета рабочих ходов пресса, содержащее трансформатор тока, выпр митель, фильтр, счетчик импульсов i.A device for counting working strokes of a press is known, which contains a current transformer, a rectifier, a filter, a pulse counter i.

Недостатком известного устройства квгл етс невысока точность счета, обуслов ленна большим диапазоном измененийThe disadvantage of the known device is low accuracy of counting, due to the large range of changes

нагрузочных усилий пресса.load press effort.

Известно устройство дл счета рабочих ходов пресса, содержащее датчик, соединенный с выпр мителем, запоминающий элемент, выход которого соединен с входом усилител - формировател , задатчик времени и пересчетный блок, к выходу которого подключен счетчик импульсов, а также фильтр, управл емый ключ, схексу совпадени и мультивибратор, управл ющий работой управл емого ключа J2j.A device for counting working strokes of a press is known, which contains a sensor connected to a rectifier, a storage element whose output is connected to the amplifier amplifier input, a time setter and a counting unit, the output of which is connected to a pulse counter, as well as a filter, controlled key, shex matches and a multivibrator controlling the operation of the control key J2j.

Работа известного устройства осуществл етс с.ледующим образок. 11ри подаче питани мультивибратор периодически ключ и запоминаюший элемент The operation of the known device is carried out with the following icon. 11In energizing the multivibrator, periodically a key and a memory element.

запоминает величину напр жени огибаю щей сигнала на выходе фильтра 1J (i Т) При последукщем замыкании ключа,через врем на входе усилител - фор5(ирова1тел формируетс напр жениеremembers the voltage value of the signal envelope at the output of the filter 1J (i T) When the key is subsequently closed, after a time at the input of the amplifier, the for5 (iro1 body forms the voltage

U U(t)-u(i-T). .U U (t) -u (i-T). .

При возрастании нштр жени на ш 1ходе фильтра на входе усилител -формироватв л по вл ютс положительные импульсы, при снижении напр жени - отрицательные. В MONteHT пуска муфты щтесса переключателем включаетс блок времени, формвм рующий контрольный интервал времени. В случае выполнени рабочей операпии за контролируемый интервал временг в серии импульсов на входе усилител5 -формироватрл происходит две смены знаков от положительного к птридателыюму, которые обрабатываютс нерасчетным блоком, формирующим в этом случае сигнал, регистрируемый счет нпсом импульсов.With an increase in the line width of the filter at the input of the amplifier, positive pulses appear at the input of the amplifier, and negative pulses when the voltage decreases. In MONteHT, the start of the clutch of the clutch with a switch activates a block of time that forms the control time interval. In the case of a working operation for a controlled interval of time in a series of pulses at the input of the amplifier 5 -formatr, there are two sign shifts from positive to positive, which are processed by an off-design block, which in this case generates a signal recorded by counting pulses.

Claims

However, this device is characterized by a lower counting accuracy, which is connected with the appearance of the envelope when smoothing the rectified, pulsating voltage with a filter, as well as with the instability of the operation of the multivibrator. The instability of the multivibrator, i.e. the instability of the period and duration of the key's key, leads to distortions of the magnitude of the voltage at the input of the amplifier. The latter, when a signal is detected by the method of single counting, realized with the help of a former driver, leads to a decrease in the accuracy of the device. The aim of the invention is to improve the accuracy of the device. This is achieved by the fact that a device containing a sensor connected to a Bunpjs-maker, a memory element, the output of which is connected to the amplifier of the amplifier, a time master and a scaling unit, the output of which is connected to a pulse counter, has an unmanaged key, whose input The connector with the output of the rectifier, and the output with the input of the storage element, the output of the amplifier - forger is connected to the input of the scaling unit and the input of the time reference, the output of which is connected to the input of the reset circuit of the scaling unit. The drawing shows a block diagram of the device. The device contains a sensor 1 connected in series, a rectifier 2, an unmanaged key 3, a memory element 4, a driver amplifier 5, a counting unit 6, a pulse counter 7, as well as a time master 8, the input of which is connected to the output of the amplifier driver and the output is with the input of the reset circuit of the lane of the counter block in. The operation of the proposed device is carried out as follows. The pulsating voltage modulated according to the load of the engine from the output of the rectifier 2 is supplied via an uncontrolled key 3, for example a diode, to the memory element 4, for example a capacitor. In this case, the storage element 4 stores the amplitude value of the pulsating signal at the output of the rectifier 2 (for example, the capacitor is charged to the amplitude value of the pulsating voltage). When a subsequent signal half-period arrives at the memory element, the input voltage of the amplifier of the imaging unit 5 may occur if the amplitude of the pulsating voltage at the output of the rectifier 2 increases. This happens when the press clutch is turned on and when the operation is performed. The amplifier-shaper 5 forms two square impulses from the pulse packets corresponding to switching on the clutch and performing the working operation. The first impulse starts the preset time 8, the second one after a specified time gives out a signal to reset the prescaler 6. If within a controlled time interval, both impulses have time to go through the impulse block 6, a pulse is sent to the impulse counter 7 About the products of the product. Otherwise (when idling is completed), the impulse received at per-counting block 6, which corresponds to the engagement of the clutch, is reset. The advantage of the proposed device is that it allows to increase the accuracy of the account, as well as to simplify the device due to the refusal of additional transformations of the signal received at the output of the sensor. Claim device A device for counting working strokes of a press, comprising a sensor connected to an extractor, a memory element whose output is connected to the input of the amplifier-former, time setting device and recalculation unit, to the output of which a pulse counter is connected, characterized in that In order to improve the accuracy of the device, an uncontrolled key is entered into it, the input of which is connected to the rectifier output, and the output is to the input of the storage element, the output of the shaping amplifier is connected to the input of the scaling unit and to the input of dates ika time, the output of which is connected to the reset input of scaler circuit unit. Sources of information taken into account during the examination: 1. USSR author's certificate No. 169906, grade C 07 C 3/08, 29.12.62.

2. USSR author's certificate number 301725, cl. Q 06 M 7/04, 02.03.70.