SU1506489A1 - Pulse shaper - Google Patents

Abstract

The invention relates to the field of automation and pulse engineering, in particular, to devices for generating pulses, and can be used in automatic control, monitoring and measurement systems. The purpose of the invention — an increase in reliability during the formation of a single pulse — is achieved by eliminating the unauthorized generation of a repeated pulse. The pulse shaper contains windings 1, 2 controls, demagnetizing winding 3, diodes 4-7, input terminals 8, 9, reed switch 10. The driver is controlled by bipolar pulses. The control pulse of positive polarity forms the front of the output pulse, and the negative cut is formed. Prior to the arrival of a demagnetizing pulse, the shaper loses sensitivity to control signals after forming a single output pulse. 2 Il.

Description

sd

about

00

with

te. /

31506489

The invention relates to automation and pulse engineering, in particular to pulse shaping devices, and can find application in automatic control systems 5, control and measurement of various branches of engineering.

The purpose of the invention is to increase reliability in the formation of a single 10 pulse by eliminating unauthorized generation of a repeated pulse.

FIG. 1 is a schematic diagram of a shaper; figure 2 - 15 sequence diagram of the shaper.

The shaper contains control windings 1 and 2, demagnetizing winding 3, diodes A-7, input terminals 8 and 9, and geozak 10, with the end of control winding 1 and 2 connected to the anode of diode 5, the cathode of which is connected to the input terminal B and the anode of diode 4 The cathode of which is connected to the beginning of the control winding 1 and the cathode of the diode 6, the anode of which is connected to the input terminal 9 and the cathode of the diode 4, the anode of which is connected to the beginning of the control winding 2. The windings 1 at the 2 controls are wound oppositely, the demagnetizing winding 3 is placed between them, and the windings 1 and 2 of the controls are located on different halves of the bulb of the law relative to the working gap. The number of turns of the winding 1 35 is selected from. calculation of ensuring the magnetization to saturation of the contact parts of the gezacon, their operation and keeping in the closed state

20

25

thirty

pinching of contact parts gezakon with a falling alternating current

,

fn

where i is the maximum amplitude of the alternating current.

The shaper works as follows.

The device is controlled during the formation of the output signal by means of short-term bipolar pulses applied to the input terminals, and the initial state is controlled by means of a variable signal with decreasing amplitude to zero to the demagnetization winding. In the initial state, all windings are de-energized, contacts of the de-gazacon are demagnetized, external load (RH) is open (Fig. 2). Let 4t6 be the first control pulse of a positive polarity current to enter the driver, as shown in FIG. 1 (without brackets) Current pulse iu (will pass from the positive in this case, the terminals through diode 6 to the control winding and then through diode 5 to the negative terminal. The winding will develop a magnetizing force, which magnetizes the contact parts to our impressions. The ends of the contact parts

In the area of the working gap, the magnetized vehicle is oppositely connected, which will cause them to close. "Having closed, the gezaco contacts do not turn on the load (R), form the leading edge of the output pulse and remain in the closed state

by means of residual magnetized - 40 d time, until the input is received

ti

where K is the safety factor for failure;

magnetizing actuation force of the gezacon; current pulse amplitude.

The number of turns of the winding 2 (Wj) is selected on the basis of the magnetization reversal of one contact part of the gesacon when released

L

The number of turns of the demagnetizing winding 3 is selected from the condition of demagnetization

0

five

five

0

five

0

nizchivaniya contact parts of the gezacon falling AC

,

fn

where i is the maximum amplitude of the alternating current.

The shaper works as follows.

The device is controlled during the formation of the output signal by means of short-term bipolar pulses applied to the input terminals, and the resetting is carried out by means of an alternating signal with decreasing amplitude to zero applied to the degaussing winding 3. In the initial state, all windings are de-energized, the contact parts of the Hesacon are demagnetized, the external load (RH) is open (Fig. 2). Let 4t6 be the first control pulse of a positive polarity current to enter the driver, as shown in FIG. 1 (without brackets). The current pulse iu (will pass from the positive terminal in this case through diode 6 to the control winding and then through diode 5 to the negative terminal. The winding will develop a magnetizing force that magnetizes the contact parts to our effect. Contact ends details

In the working gap area, magnetizable magnetocores are unlikely, which will cause them to close. “Having closed, the contacts of the gezacon will turn on the load (R), form the leading edge of the output pulse and remain in the closed state

d time until the input is received

five

0

five

negative polarity impulse. If during the specified time the pulses of the same positive polarity arrive at the input, then they will not change the on state of the driver.

The current pulse of the inverse negative polarity iuij ,, arriving at the input of the device, will pass from the positive terminal, in this case through diode 4, into winding 1, then into winding 2 and through diode 7 to negative terminal. Winding 1 will develop a magnetizing force in the same direction as in the first case, and confirm the magnetization of the left contact-detail of the gezacon. The winding 2 will develop a magnetizing force, the counter magnetizing force of the winding 1, which will lead to a reversal of the right contact-part. At the same time, the ends of the contact parts in the area of the working gap are magnetically identical and open, forming the falling edge of the output pulse (turning off RH). Thus, the device generates an output pulse, the duration of which is determined only by the difference in arrival times of the first pulse of one positive polarity and then followed by the first pulse of the other polarity. The remaining pulses are cut off. I

To return the former to the initial state, it is necessary to apply a variable polarity signal to the demagnetization winding 3 (Fig. 2). The indicated signal will demagnetize the contact parts of the gezacon and set the shaper to its initial state. Further cycles are repeated.

Z

P

II 11

rmul

the invention

A pulse shaper containing the first diode, the first and second input terminals, and the gezakon with the first and second control windings located on it, are wound oppositely and in series, the anode of the first diode connected to the ends of the first and second control windings, and the cathode from the first input terminal, characterized in that, in order to increase reliability in the formation of a single pulse by eliminating unauthorized generation of a repeated pulse, three diodes are inserted, and between the control windings The demagnetization winding is placed, the anode of the second diode is connected to the cathode of the first diode, and the cathode is connected to the beginning of the first control winding and the cathode of the third diode, the anode of which is connected to the fourth diode cathode and the second input terminal to the beginning of the second control winding.

one

m

g

Claims (2)

Formula and To return the former to its original state, it is necessary to apply a damping signal of variable polarity to the demagnetization winding 3 (Fig. 2). The specified signal will demagnetize the contact parts of the hezakon and install the driver in the initial state of pulse acquisition, containing the first and second hezacon with the first diode, input terminals and first and second control windings wound thereon, wound in the opposite direction and in series, the anode of the first diode connected to the ends of the first and second control windings, and the cathode with the first input terminal, characterized in that, in order to increase reliability during the formation of a single pulse due to the exception is not of an associated repeated pulse formation, three diodes are introduced, and a demagnetization winding is placed between the control windings, the anode of the second diode connected to the cathode of the first diode, and the cathode with the beginning of the first control winding and the cathode of the third diode, the anode of which is connected to the cathode of the fourth diode and the second input terminal, the anode of the fourth diode is connected to the beginning of the second winding