SU1390577A1 - Device for measuring intensity of pulsed electric field - Google Patents

Abstract

This invention relates to a measurement technique. The purpose of the invention is the extension of the working range to the high frequencies. The device contains two flat round coaxial metals. plates 1 and 2 parallel to each other. An electromagnet is installed in the center of the outer surface of the plate 2. screen 3, inside of which are series-connected voltage follower 4, voltage converter 6 — current, LED 7, and resistor 8. Plate 2 is connected to the zero bus of the electronic unit of the device. The luminous flux emitted by the LED 7 is output from the screen 3 by means of a light guide. Introduced block 5 comparison. Plate 1 is divided in diameter into two equal electrically isolated segments 1a and 16. Segment 1a is connected to LED 7 and inverting input of unit 5. Segment 16 is connected to repeater input 4. When operating in the frequency range exceeding the cut-off frequency, only circuit G is working 1a , LED 7, resistor 8. In this case, max, the limiting frequency of the device is determined only by the speed of LED 7. 1 sludge. i (L

Description

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The invention relates to a measurement technique and can be used to measure the intensity of a pulsed electric field.

The purpose of the invention is to expand the working range of the high frequency region.

Figure 11 shows a structural electrical circuit diagram of a Device 11 Step for measuring the averagedness of a pulsed electric field,

A device for measuring the intensity of a pulsed electric field, contains dia flat flat coaxial metal plates 1 and 2 parallel to each other. The plate 1 is divided in diameter into two equal electrically isolated segments 1a and 16. At the center of the outer surface of the plate 2 there is an electromagnetic screen 3, inside which are connected in series a voltage follower 4, a unit, 5 comparison, a voltage converter 6 - current, an LED 7 and a resistor. Segment 1a is connected to the LED 7 and the inverting input of the comparison unit 5, and segment 16 to the input of the voltage follower 4. Plate

2 connected to the zero bus electronic unit of the device. The luminous flux emitted by the LED 7 is output from the electromagnetic screen.

3will LED wince.

The device operates as follows.

Under-action of the component K, the vector of the intensity of the pulsed electric field of the normal plane of the device plates between the plates-la and 2, a difference of the potentials appears

where li is the distance between the plates; F. is the dielectric constant of the dielectric filling the space between the plates.

The same potential difference arises between plates 16 and 2, since h and in both cases are the same. Under the influence of a difference in the range of frequencies not exceeding the cut-off frequency Fpp, a voltage follower 4, a comparison unit 5 and a voltage converter 6 are the current under in (each; 1 the potential difference

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Through the emitting LED 7 A15, the discharge current of the capacitor C formed by the plates 1a and 2 is used. In this case, the comparison unit 5 continuously compares the potentials of the plates 1a and 16, and with the help of the converter 6, the voltage - the current maintains so that the potentials of plates 1a and 16 remain Equal, thus preventing the rapid discharge of capacitor Cd through the low-resistance circuit of the diode. Thus, the lower cutoff frequency of the device, as compared with the known device, is determined by the input resistance of the repeater A voltage K gy and the capacitor capacitance C ,,. The upper cut-off frequency of the device is determined by the speed of only the emitting LED 7, while for a known device it also depends on the inertia of the entire electronic unit 5. Resistor 8 serves to linearize the current-voltage characteristic of the LED circuit and set the conversion slope. A source is used to set the initial bias current through the radiating LED 7.

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When operating in the frequency range exceeding Ffp, only the circuit operates: plate 1a, LED 7, resistor 8 and in this case the maximum cutoff frequency of the device is determined only by the speed of LED 7. To set the initial bias current through the radiation, LED 7 uses a reference voltage source wives Pr „.

Claims (1)

Invention Formula A device for measuring the intensity of a pulsed electric field, containing two flat circular coaxial metal plates parallel to each other, in the center of the outer surface of one of which there is an electromagnetic screen, inside which there is a voltage follower and a series-connected voltage converter — a current and an LED that is different By the fact that, in order to extend the working range in the upper frequency range, between the voltage follower and the converter, for example, 31J9U5774 live - current additionally introduced, the first of which is connected to the comparison unit, and the second flat output of the converter, the voltage is circular coaxially metal plate and the second input of the comparison unit, divided by diameter into two equal-second segment connected to the entrance electrically isolated segmented voltage repeater.