SU1065860A1 - Device for checking analog operational blocks - Google Patents

Abstract

The HCNPAliHOCTH ANALOG DECISIVE BLOCKS CONTROL DEVICE contains an indicator, a narrowband filter, a test generator, a signal, current inputs, the resistor, which first output under the keys to the narrowband filter input, is different in that it additionally contains thresholds an element whose input is connected to the output of a narrow-band filter, and the output is connected to an indicator, a limiting resistor connected between the output of the test signal generator and the second current output adagadego resistor pervyy.i second switches, the first of which is connected between a connection point tokozadakntsego resistor to the input of the narrowband filter and yyhodom kontrot iruemogo unit, the second key point compounds incorporated meladu limiting resistors and voltage driving S and zero potential bus.;

Description

d

1n8)

F

ate

sc

Oi

I

I

This invention relates to analog computing.

A known device for monitoring the health of analog decision blocks, containing an indicator of voltage overload, arises in the process of signal processing ij.

The disadvantage of this device is the false positive response of the indicator, for example, due to a short-term overload of the healthy block by the throws of the processed signal.

Closest to the present invention is a device in which from the output of an operational amplifier of a monitored unit that performs signal processing in the periodization mode, i.e. alternating clock cycles, the voltage drop from the current supplied in the initial conditions input cycle from the test signal generator through the resistor is removed. For a serviceable unit, the indicated voltage drop is small, if it is faulty, this voltage increases and, acting through a narrow-band filter on the indicator, triggers the last 2,

A disadvantage of the known device is that both the actuation and the failure of the indicator can be difficult, i.e. be caused, respectively, either by the presence in the output signal of the monitored block of frequency components to cx, coincidentally with the passband of the e-band filter, or by the device’s own malfunction. In addition, the device has limited application, since not always the processing of analog signals is performed in the periodization mode.

The purpose of the invention is to increase the reliability of monitoring the operability of analog solver blocks.

This goal is achieved by the fact that a device for monitoring the analog block solids containing an indicator, a narrowband filter, a current resistor, a first output terminal connected to the input of the narrowband filter, and a test signal generator, additionally introduced a threshold element, the input of which is connected to narrowband filter output, and the output is connected to the indicator, limiting the resistor connected in series between the output of the test signal generator and the second output of the current generating circuit. the first and second keys, the first of which is connected between the connection point of the governing resistor with the input of the narrowband filter and the output of the monitored unit, the second switch is connected to the connecting point of the limiting and current supplying resistors and the zero potential bus. The drawing is functional. scheme of the proposed device.

A device for monitoring the health of analog decision blocks contains a test generator 1

0 signal, indicator 2, threshold element 3, a lowband filter 4, 5 and a second key, a limiting resistor 7, current-response resistor 8.

5 The device input serves to connect the monitored unit and is connected via the first switch 5 to the input of the narrowband filter 4, the output of which is connected to the input of the threshold element 3. The output of the threshold element 3 is connected to the indicator 2, the output of the narrowband filter 4 through the current-setting resistor 8 and limiting resistor 7 is connected to test signal generator 1. The connection point of the limiting 7 and current-setting 8 resistors is connected via a second switch b to the zero potential bus.

The device works as follows

in a way.

After turning on the power, the test signal generator 1 begins to generate a test signal.

5 signal; which, through the limiting resistor 7, the current-setting resistor 8 and the narrow-band filter 4 is fed to the threshold element 3. If the indicator 2 does not work,

0 This means that a failure has occurred in the control device. If the indicator 2 has worked, you should close the second key 6 and then the indicator 2 should go out, which will indicate the health of the device. Then, by locking the first i-key 5, a valid block is connected, which at that time performs its inherent functions — it processes analog signals. If the signals at the output of the block under test do not contain frequency components that pass through the narrowband filter 4 and can; cause the false triggering of indicator 2, then after closing the first key 5, indicator 2 will not work. Then you should unlock the second key b, while the monitored block will go through the limiting 7 and current-setting 8 resistors to the monitored block

0 current from the generator 1 test signal. If the control unit is normal, the voltage drop from this current on it will be small, the threshold voltage nt 3 and the indicator 2 will not

5 will work. In case of malfunction

J 1065860I

of the unit being tested, the fall of the straight-setting threshold in the threshold elen on it sharply increases and, in ment 3, a level higher /

indicator 2 will work. Partial failures can be detected with the help of well-known blitches.

Claims (1)

DEVICE FOR MONITORING THE PROBABILITY OF ANALOGUE SOLUTION BLOCKS, containing an indicator, a narrow-band filter, a test generator _; a signal, a current-sensing resistor, the first output of which is connected to the input of the narrow-band filter, characterized in that, c, in order to increase the reliability of control, it additionally contains a threshold element, the input of which is connected to the output of the narrow-band filter, and the output is connected to an indicator limiting the resistor connected between the output of the test signal generator and the second output of the current-setting resistor, the first and second keys, the first of which is connected between the connection point of the current-setting resistor with the input bandpass filter and the output of the monitored unit, the second key is connected between the connection point of the limiting and current-setting resistors and the bus zero potential.