SU507861A1 - Device for tolerance control - Google Patents

Description

(54) DEVICE FOR ADMISSION CONTROL

one

The invention relates to devices for technical diagnostics, in particular, devices, automatic monitoring of the health and localization of faults in radio-electronic systems, special measuring devices;

; There are known devices for tolerance 1Control, which contain a block of protection against power supplies and short circuits connected in series with a power source, a driving voltage, a power supply source control unit, a control input key of which is connected to the output of the protection unit from overcurrent and short circuits and to the regulating input source: Ka supply voltage, and display unit: in series connected control units of output parameters of functional objects, BAN elements, control inputs of which Connected to the key output, two-input OR elements and fault indicators.

However, when controlling complex systems, when the object of control is a group (functional objects that are fed

16 t of one common source of supply voltage, having a block of protection against overcurrent and short circuit, has a low reliability of control, so 1 as in this case, if one or several functional objects cause malfunctions causing overcurrent of the power source, It is not possible to clearly indicate which functional object under control is faulty.

The aim of the invention is to increase the reliability of control during the tolerance control of a group of functional objects with a common source of supply voltage, an overcurrent protection unit and short circuits.

To do this, a multi-input element OR, sensors, overcurrent pickups, and matching signal drivers are introduced into the proposed device, the output of the power supply source through sensors.: The maximum current is connected to input1 of the matching signal drivers, FHHO- | | 1 of the OR elements and to the input of the switch; the OR element connected through the driver of the matching signals with the flea input is protected from Toky loads and short circuits. The structural scheme of the proposed ycTppsa for tolerance control together with the control object for the case where the Q1-a control is S1; three functional units fed from one common source of supply voltage are shown in the drawing. In the diagram, the following symbols are accepted: 1 — source of supply voltage, 2 overcurrent protection and short circuit protection unit, 3-5 - max-date dates; 6-9 - shapers of matching signals, 1O - multi-input element OR, 11 - control unit of the source of the fading voltage, 12 - key, 13 - indication blocks, 14-16 - k6n; , 17-19 - KOHTV blocks, the role of output parameters of functional elements, 2CU22 - BANKS, 23-25 - two-input elements OR, 26-28 - fault indicators. If the currents consumed by the monitored functional objects 14-16 from the source of supply voltage 1 and flowing through the maximum current sensors 3-5 do not exceed the allowable values typical for overcurrent or short-circuit modes, then the signals the output of the maximum current sensors 3, 4, 5 and the output of the formers of matching signals 6, 7, 8 are absent; there is also no signal at the output of the multiple input element OR Yu, which controls the protection unit 2. The voltage from source 1 through sensors is maximum A small current of 3,.; 4, 5 is supplied to the controlled functional -objects 14, 15, 16. The output parameters used to monitor functional objects 14, 15, 16 are fed to the inputs of the corresponding locks of the third objects 17, 18, 19, ;: and a controlled voltage from the source of supply voltage is fed to the input of the control unit of the power source 11. If the voltage of the controlled source. The nickname of the supply voltage 1, which enters the input of the Control Unit of this source 11 is outside the tolerance field, the control unit of the source of the child. Voltage 11 discharges a malfunction signal to the key 12, which, if the protection unit does not operate, 2 is normally closed and passes this signal to the input of the display unit 13 and to the prohibitory inputs of the BANNER elements 2O, 21, 22. Vi. 1 out of FIELD tolerance voltage

Claims (1)

causes a change in the Cell Parameters of the monitored functional volumes 14, 15,; 1c, which can exceed the maximum permissible values and cause. the appearance at the output of the corresponding control unit of the functional object of the malfunction signal. However, due to the input to the inhibit inputs of the ZAGY BT 2p, 21, 22 signal elements,: The fault signals from the outputs of the Control 17, 18, 19 do not pass to the two input elements ILI 23, 24, 25 and; lanee on fault indicators 26, 27, 28 ..,. -, ; Thus, false indications of malfunction indicators caused by malfunction of the power supply source are eliminated: HE voltage, i.e., reliably occur; CONTROL, i If the monitored power supply is in the tolerance field, the malfunction signal at the output of the power supply control unit wives 11 absent. em, this causes the absence of a signal at the output of the key 12 and at the prohibiting inputs of the elements BANKS 2O, 21, 22. In the case of one or more of the controlled output parameters of the functional objects 14, 15, 16 of the specified parameters: for them the tolerance fields at the outputs of the control blocks 17, 18 .9, malfunction signals are generated, due to the absence of a prohibition signal at the output of the key 1.2, the malfunction signals from the outputs of the control blocks 17, 18 or 19 through the elements of ZAVRET 2O, 21, 22 can be fed to the inputs of the two-input elements OR 23, 24, 25 and from the outputs of these The elements are at the inputs of the malfunction indicators 26, 27, 28. When any of the monitored functional objects 14, 15,: 16 appear, a malfunction that causes the current source overload or short circuit at its output is one of the sensors; 3, 4 or 5 current signal, which through the corresponding shaper matching signals & 6, 7 or 8 is fed to one of the inputs of the multi-input-element OR S and to one of the inputs of the corresponding two-input element OR 23, 24 or 25. Appearance at one of the entrances. ovhodo-, Vågå OR - Yu signal causes the signal on occurrence at vrsode this circuit, this signal via the signal generator 9 postuyaet matching the input protection 2 and causes it to block tripping. When the protection unit 2 is triggered, the voltage at the output of the control unit of the source of supply voltage 1 decreases to zero and p1 kl 12, while the output of the block 11 shows a malfunction signal, but the fact that k | tsch 12 open This signal is not sent to the Ivd daiyin 13 n block on the forbidden ts e cops. Prevent i2O ,, 21, 22. The p | result does not give false readings of the display unit 13, because the source of the power supply is closed when the unit operates; voltage does not fail and does not require replacement. The same signals of the outputs of blocks 17, 18, 19 can pass to the inputs of two-input elements ILY 23, 24, 25. Reducing the supply voltage to zero leads to a sharp change in the control, output parameters of functional volumes 14, 15, 16, The values of these parameters may, for example, / be reduced to values close to zero, -i However, if all the output parameters of functional objects are controlled by the maximum tolerance, when all sign controllers | Values lying down | lower than maximum invertible values, including zero values by controlling .. proxy variables are permissible, these controlled parameters may remain in, within the field of tolerance and in sipnal neispravIHOCTH blocks outputs a control output parameters I functional entities 17, 118, 19 may be omitted. A signal received at one of the inputs of the corresponding two-input element OR 23, | -24 or 25 causes the appearance at output I of this element of the signal, which includes the corresponding fault indicator 126. 27 or 28. Thanks to this, in addition to locale. the non-uniformity of functional objects 6b when they are monitored by input parameters, j is also provided for such faults that cause an overcurrent or short current in the source of supply voltage | closure n "rvi vykhopy. Claims device for tolerance control, containing a block of protection against overcurrent and short circuits, serially connected source of supply voltage, block of control of a source of supply voltage, key, the control input of which is connected to the output of the block of protection against overcurrent and short-circuits n the control input of the power supply source), and the display unit and the series-connected control units of the output parameters of functional objects, BAN elements, control inputs which are connected to the output of the key, two-input OR elements and fault indicators, iw ALSO, so that, in order to increase the reliability of the control, a multi-input element OR, an overcurrent sensor and shapers of output signals are entered into it, and the output power supply source through the maximum sensors, - connected to the inputs of the | harmonizer and matching signals, the outputs of which are connected to the inputs of the two-input OR elements and to the input of the multi-input OR element connected s matching signals from the input block protection from overcurrent and short circuit.