SU1651301A1 - Impulse noise simulator - Google Patents

Abstract

The invention relates to automation, communication and computing, and may be used when testing equipment for noise immunity. The purpose of the invention is to expand the functionality of the device by simulating a sequence of alternating impulse noise of different polarity. The device contains an electromagnetic polarized relay, a DC power supply, four variable limiting resistors, three variable capacitor coupling capacitor, as well as an adjustable voltage divider and four contact groups of the electromagnetic polarized relay. 1 il. with SL

Description

The invention relates to automation, communication and computing, and can be used when testing equipment for noise immunity.

The aim of the invention is to enhance the functionality of the device by simulating a sequence of alternating impulse noises of different polarities.

In the drawing, refer to the diagram of the device.

The device contains an electromagnetic polarized relay 1, the first cumulative variable capacitor 2, the first variable limiting resistor 3, the second cumulative variable capacitor 4, the second variable limiting resistor 5, the third variable limiting transistor 6, the third cumulative variable capacitor 7, the fourth variable limiting resistor 8, adjustable voltage divider 9, separation capacitor 10, first contact group of a polarized relay P, second group 12, third 13, quarter rtuyu 14, contact groups polarized relays 1, 15 istochnig constant TOKd.

Polarized relay 1 is designed to control the generation of impulse noise. The chains of series-connected variable resistors and variable capacitors 2iZ, 4i5, 7n8 set the parameters of interference. The variable limiting resistor 6 is designed to control noise interference. In quality

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A potentiometer can be used in the variable voltage divider.

A device for simulating impulse noise operates as follows.

When the power supply source 15 is disconnected, the bark of the polarized relay 1 can be in one of two positions — normal and translated, the first corresponds to the closure of the common and opening contacts, to the second to the common and to the closure. The drawing shows the normal position of the core and, accordingly, the contacts of the polarized relay 1, its winding is connected to the negative pole of the power source 15 via the common and opening contacts of the first group 11 and the negative terminal to the positive pole of the power source 15 via the common and closing contacts of the second group 12 and a variable resistor 6, which limits the current through the winding of the relay 1.

When the power is turned on, the reverse polarity voltage (not corresponding to the core position) will be applied to the winding of the polarized relay, which should cause the core to transfer from the normal position to the transferred one, current will flow through the fourth variable resistor 6, the relay winding 1 and the variables connected in parallel the capacitor 7 and the resistor 8. The resistance of the voltage divider 9 connected in parallel to the winding of the relay 1 is much higher (10V-10) from the resistance of the winding 1, so it does not bypass the winding and serves to regulate The voltages are supplied by supplying through a constant coupling capacitor 10 to the output of the device. The winding of the relay 1 will be shunted with the first storage variable capacitor 2 and the first variable limiting resistor 3, since at the time of turning on the power, the capacitor 2 is completely discharged. The charge time of a variable capacitor 2 depends on its capacity and the resistance of variable resistors 3 and 6. This determines the delay in switching relay 1 from the normal position to the translated one. As soon as the current in the winding of the relay 1 reaches the value of the operation current, the measles will transfer and switch the common contacts with 10

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on the closing. When the relay I coil is disconnected from the power source 15 in iomen1 4 hops on the common and opening contacts of the first 11 and second 12 contact groups, a discharge occurs, the voltage pulse of which is supplied through the voltage divider 9 and through the constant separation capacitor 10, which protection of the tested equipment from constant voltage. Pa free potential of the capacitor 10 will be a positive potential, and on the negative terminal of the relay coil 1 - passive. The fourth variable resistor 8 and the third variable capacitor 7 connected in series and connected in parallel to the winding of relay 1 do not affect the switching delay time of relay 1. They are designed to control the parameters of interference pulses.

After transferring the relay box 1 switches to the translated state, the common contacts are closed with the closing ones. The first cumulative variable capacitor 2 is closed through the contacts of the fourth group 14 to the first variable limiting resistor 3 and is completely discharged. The power supply 15 is now connected to the third group 13 connected in series by the second storage variable capacitor 4 and the second variable limiting resistor 5 together with the resistor 6, the switching time of the relay 1 from the translated position to the normal is determined. Using the first 11 and second 12 contact groups, the polarity of the connection of the winding of the polarized relay 1 to the power supply 15 is changed. Now, direct polarity is applied to the winding I at the switched position of the core. When the current in the winding of relay 1 reaches the value of the actuation current, the measles are shifted back to normal. When the relay 1 winding is disconnected from the power source 15 at the moment of the transition of the core between the common and closing contacts of the first and second groups, a discharge occurs, but already in reverse polarity, the interference pulse from the common contacts of the first 11 and second 12 groups comes through divider 9 and constant separation capacitor 10 at the output of the device. In this case, a positive potential is created at the negative terminal of the winding of the relay 1, and negative at the common terminal of the permanent separation capacitor 10. After switching over the relay core 1 will again be in the normal state t, the common contacts will close with the disconnecting ones, the second storage variable capacitor 4 will close through the contacts of the fourth group 14 to the second variable limiting resistor 5, and the first storage variable capacitor 2 and the first variable limiting resistor 3 connected to the power source through the contacts of the third group 13. Then the process repeats. The relay will work while the power is supplied from the source 15. Each time the relay 1 switches, at the moment its oO-coil is disconnected from the power source 15, both the first 1 and second 12 groups will receive a discharge, a surge of overvoltage flows through the divider 9 and constant This separation capacitor 10 at the output of the device, and if we take the minus signal of the relay 1 winding as a common output, then switching the polarized relay from the normal position to the translated one will cause a positive interference from the output of the device. g, and when switching the relay 1 from the translated position to the normal, the output of the devices will receive a negative interference pulse. formula of invention

A device for simulating impulse noise, containing a DC source, a coupling capacitor, an adjustable voltage divider, three variable limiting resistors, two storage variable capacitors, and a polarized electromagnetic relay, the output of the negative interference impulse of the device through the coupling capacitor connected to the middle adjustable voltage divider, the first output of which is connected to the positive output polarized electromagnetic relay5 the minus terminal of the winding of which is connected to the second output of the adjustable dhpch ... -l voltage and the output of the positive impulse of the disturbing device, the first DC source through the first variable limiting resistor connected to the first output of the first cumulative variable Q capacitor and the first output of the second storage variable capacitor, characterized in that, in order to expand the functionality of the device by

15 simulating a sequence of alternating impulse noise of different polarity, it additionally introduces a third variable storage capacitor, a fourth variable resistor and a four contact terminal of a polarized electromagnetic relay, the positive terminal of the winding of which is connected to the common contact of the first contact group,

25 disconnecting contact of which is connected to the closing contact of the second group, as well as connected to the common contact of the third group and the first source of constant current, second chic;: o

30 of them are connected to common contact

the fourth group and, through the second cumulative variable capacitor-, with the first output of the second variable limiting resistor, the second output of which is connected to the fourth contact of the fourth group and the closing contact of the third group, the disconnecting contact of which is connected to the fourth contact of the fourth group and the second output of the first storage variable capacitor, the second bus of the direct current source through the third variable limiting resistor is connected to the fifth contact of the first circuit ppy and break contacts of the second group, a common contact of which is connected to the negative terminal of polarized electromagnetic relay 50 to sequence through fourth variable but included a limiting resistor and a third cumulative variable capacitor to positive output polarized electromagnetic relay.

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Claims (1)

The claims of which the winding terminal is connected to the second terminal of the adjustable voltage divider and the output of a positive interference pulse of the device, the first DC bus being connected through the first alternating limiting resistor to the first terminal of the first storage variable capacitor and the first terminal of the second storage variable capacitor, characterized in that, in order to expand the functional capabilities of the device by modeling a sequence of alternating pulsed interference of different polarity, it additionally introduced a third storage variable capacitor, a fourth variable limiting resistor and four contact groups of a polarized electromagnetic relay, the positive output of the winding of which is connected to the common contact of the first contact group, the breaking contact of which is connected to the closing contact of the second group, and connected to the common contact of the third group and the first bus of the DC source, the second bus of which is connected to the common contact: four rtoy groups and through the second storage capacitor · alternating with the first terminal of the second variable limiting resistor, a second terminal of which is connected to the NC contact and the fourth group za- ⁴ abutting contact of the third group, the break contact of which is connected to the normally open contact of the fourth group ^- A device for simulating pulsed interference, containing a direct current source, an isolation capacitor, an adjustable voltage divider, an alternating current limiting resistor, two storage variable capacitors and a polarized electromagnetic relay, and the output of the device’s negative impulse through the isolation capacitor is connected to an average output of 5Q. adjustable voltage divider, the first terminal of which is connected to the positive terminal of the polarized electromagnetic relay winding, minus 40 ps and the second terminal of the first storage variable capacitor, the second DC bus is connected to the normally closed contact of the first group and the normally closed contact of the second group through the third alternating limiting resistor the contact of which is connected to the negative terminal of the polarized electromagnetic relay and through the subsequent but connected fourth This is a limiting resistor and a third storage variable capacitor to the positive terminal of a polarized electromagnetic relay. 1651361