SU1241149A1 - Device for checking resistances of resistors - Google Patents

Abstract

This invention relates to instrumentation technology. It can be used to control whether the resistor is in a given range. The goal will invent i-no - enhanced functionality. For this purpose, a device containing a comparison element 5 (switch), the first 8 and second 9 terminals for connecting a controlled resistor 1, 2 of a resistor 3.1, 3.2, 2 diodes 4.1, 4.2, introduced a p-phase multivibrator 2 (, 3, .. .t), n - 2 additional resistors 3.3 - Z.p, n - 2 additional diodes, determinant 6 of the pulse duration, adjustable source 7 of the reference voltage. The resistances of resistors 3.1 - З.п are chosen from the condition of increasing the resistance value when the number of the resistor З.л increases, so as to divide the whole range of gradations of the possible resistance values into subranges. Pulse selectors can be used as determinants of duration. Due to the introduction of the multivibrator 2, the resistors 3.3 - Z.p, the diodes 4.3-4.p, the element 5 of the comparison, the source 7 of the optic - (Lt.n CO

Description

.1241149

The increase in the number of voltage gradients in the source 7 is ensured by providing the resistance of the resistor 1. For a smooth change of the range, the scoring of the possibility of the smooth measurement of the dations. 1 il.

The invention relates to a monitoring and measuring technique and can be used to control whether a resistor is in a given range, to control current, and as a converter of current to pulse duration.

The purpose of the invention is to expand the functionality of the device by increasing the number of gradations of resistance values of the controlled resistor with the possibility of smoothly changing the range of gradations.

The drawing shows a diagram of the proposed device.

The device for monitoring the resistance of the resistor 1 contains p-phase multivibrator 2, p resistors 3.1 - 3.P, the values of which differ from each other, and the resistance value of resistor 3.i is greater than the resistance value of resistor 3.1-1 diodes 4.1-4. P according to the number of outputs of the p-phase multivibrator 2, element 5. Comparison (for example, a comparator or a threshold element), determinant 6 of the pulse duration, adjustable source 7 of the reference voltage, first 8 and second 9 terminals for connecting the controlled resistor 1 and outputs 10.1 - 10.P multivibra ora 2

Each of the n outputs of the p-phase multivibrator 2 is connected via an appropriate and serially connected resistor 3.1 and diode 4.i to the first terminal 8 for connecting a controlled resistor 1 and to the first input of the comparison element 5 connected by a second input through an adjustable reference voltage source 7 common bus device, and the output - with the input of the determinant of 6 pulses.

The device works as follows.

The controlled resistor 1 is connected to the terminals B and 9 of the device. From source 7 is set to the input element. This 5 voltage, defining the range of the monitored resistance values of the resistor G. The n-phase multivibrator 2 generates alternately at each of its outputs 10.1-IO.n a pulse with a polarity duration necessary for passing through the diode 4.1 (for the the diode 4.1 turn-on drawing - negative pulse).

Resistors 3.1-Z.p

5 are chosen from the condition of increasing the resistance value with increasing resistor number 3.i so as to break the whole range of gradations of possible resistance values into subdis,

0 apazons. ,

If the resistance value of the monitored resistor 1 is outside the range of permissible gradations given by source 7, less than norm, then if there is a signal at any of the outputs 10.1-1O.p of multivibrator 2, the voltage at the input of element 5 created by the current flowing through the circuit: output i of multivibrator 2, resis-,

0 torus 3.1, diode 4.1, terminal 8, detector 1, terminal 9, common bus, less than the reference (threshold) value given by source 7, element 5 does not work and gives a no-response signal.

If the resistance of the monitored resistor 1 is outside the range of permissible gradations and is higher than the norm, then if there is a signal on any of the 10.1-IO.n outputs of the multivibrator 2, the current flowing through the 3.t resistor is 4.t diode and resistor 1 to create at the input of the element 5 a voltage greater than the voltage of the source 7. As a result, the element 5 operates and produces a constant signal at the output.

31241

If the resistance of the monitored resistor is in the range of gradations in one, for example, i-th, sub-band, THEN in the presence of signals at 10.1-10. The outputs of the multivibrator 2 5 element 5 work, and in the presence of a signal at 10. i + 1 - 10-n outputs do not work.

As a result, periodically 0 pulses of duration i are generated at the output of the comparison element 5; With an interval (n-i). By the duration of the output pulse of element 5, which is proportional to the number of the subband in which the resistance of the resistor 1 is located, the number of the subband can be determined and thus the resistance of the resistors 1 can be graded by subbands.

20

For example, if there are two gradations of resistance of resistor 1 (p 2), the output of element 5 produces three types of signals: Triggered, Non-triggered, Switches with duration and spacing, depending on the resistance of the resistor 1.

The pulses from the output of the comparison element 5 are fed to the input of the duration determiner, the determinant 6 of the duration of the duration of the input pulse I determines the number of the subband to which the resistor belongs and generates a signal according to which

35

You can determine the number of subranges.

For example, in the case of. The incandescent lamp will have three states: lit, off, blinking, from which it is easy to determine the range of resistance values of resistor 1.

For example, the incandescent lamp, e.g. , the duration of the burning of which the operator can determine the number of sub-bands.

Editor A.Lezhnina

Compiled by V. Dvorkin

Tehred O. Sopko. Proofreader T. Kolb

Order 3483/39. Circulation 728 Subscription

VNII11I State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

five

0 15

20

25 about 5

1494

To increase the objectivity and accuracy of estimating the subband number, pulse selectors can be used as duration determinants 6.

Thus, due to the introduction of multivibrator 2, resistors 3.3-Z.p, diodes 4.3-4.P, comparison element 5 and source 7, the number of gradations of resistance of resistor 1 increases, and due to the possibility of smoothly adjusting the voltage of source 7, range of gradations.

Claims (1)

Invention Formula A device for monitoring the resistances of resistors, containing two resistors, two diodes, a reference element, a first terminal for connecting a controlled resistor and a second terminal for connecting a controlled resistor, connected to the common bus of the device, which is expanding the functionality of the device by increasing the number of gradations of resistance values of the monitored resistor with the possibility of smoothly varying the gradation range, n-phase multivibrator (, 3, ..., i) , p-2 additional resistors, p-2 additional diode, pulse duration determiner and adjustable source of voltage, with each of the p-outputs of the n-phase multivibrator connected via appropriate and series-connected resistors and a diode to the first terminal for connecting -. resistor and with the first input of the comparison element connected by the second input through an adjustable source of reference voltage with the total thickness of the device, the output with the input of the pulse width determinant.