RU1807452C - Device for automatic testing and indication - Google Patents

Abstract

Usage: at control objects with changing parameters. The inventive device comprises: 1 synchronization and addressing unit (1), 2 multiplexers (2,4) 2 indication units (3,25), 1 frequency divider (5), 1 AND-NOT element (6), 3 keys ( 7.9, 18), 1 element NOT (8), 1 block of parameter sensors (10), 1 comparator (11), 1 block of settings memory (12), 1 one-shot (13), 1 element And

Description

Q

at

B

0

Ti

Cfoocfl about

00

about

g

Yu

The invention relates to automation and telemechanics and can be used in devices for automated monitoring of cyclic processes, in cyclic control systems as means of monitoring the correctness of changes in the state of control objects.

The purpose of the invention is to expand the functionality of the device by tracking the real-time occurrence of an alarm and determining the time remaining until a normalized change in the state of the object by selecting display modes.

The drawing shows a functional diagram of the device.

The device for automatic control and indication comprises a synchronization and addressing unit 1, a first multiplexer 2, a first indication unit 3, a second multiplexer 4, a frequency divider 5, an NAND 6 element, a first key 7, an HE 8 element, a second key 9, block 10 parameter sensors, comparator 11, setpoint memory block 12, single vibrator 13, AND element 14, OR element 15, first counter 16 (binary), trigger 17, third key 18, first register 19, delay element 20, second counter 21 (binary -decimal), second register 22 (universal, operating in asynchronous and synchronous modes), switch 23, descrambler 24, the second display unit 25. In the drawing, the positions also mark: the output 26 of the device alarm signal and its reset input 27 and the indication mode control input.

The device operates as follows.

In the real-time clock indication mode, the switch 23 is opened by a control signal from the control input of the device indication mode.

The reset signal is fed to the input 27 of the device and sets the trigger 17 and counter 16 to zero. When a negative pulse is applied to the clock input via the OR elements 15 and the delay 20, a setup code equal to gmax (maximum permissible time) is written to the internal register of the counter 21. transition of the monitored object from the QM state to the QI state) and previously recorded on the register 19. At the same time, the operation of the counter 21 and the comparator 11 is blocked for the duration of the Reset signal.

After the Reset signal ends, comparator 11 compares information frames at its information inputs. Block 1 synchronization and addressing sequentially generates address

signals to the address inputs of multiplexers 2 and 4 and the first side 3 indication. The multiplexer 2 sequentially connects the outputs of the sensors of block 10 to the information input of the first key 7. Similarly, the multiplexer 4 connects the information outputs of the block 12 of the settings memory to the information input of the second key 9. Generation of address signals of all

sensor unit 10 of the parameter sensors comprises one scan cycle.

A signal with a frequency of repetition of scanning cycles is supplied to a frequency divider 5, from the output of which a signal from

duty cycle 2 and the frequency of normal perception by the operator. Since after the reset signal is issued, trigger 17 is set to zero and there is no signal at its direct output, the AND-NOT element 6

closed at its first entrance; and, therefore, the first key 7 is constantly open at the control input and the second key 9 is closed through the element NOT 8. Thus, in the first display unit 3 in series

information is input from the sensors of unit 10, by which a dynamic indication of their status is carried out.

Let for a certain time interval r t max from the moment of signal

Resetting the monitored object has reached the QI state, while the AI information frame taken from the sensors of block 10 is bitwise equal to the A1 frame taken from the information outputs of the settings memory unit 12. On the

 the output of the comparator 11 is a signal triggering a one-shot 13, which increments the counter 16 through the AND element 14, through the OR element 15 and the delay element 20, restarts the counter 21 and prohibits the operation of the comparator 11 at the time tia 18 to the subtracting input of counter 21, subtracts logical 1 from the current state. When going over the counter

21 from the state 000 ... to the state 999 ..., at its overflow output a corresponding signal appears, and the current state of the counter 21 through the register 22 is supplied to the decoder 24, is decoded and indicated by the second display unit 25. The increment of the counter 16 causes the appearance of the A2 frame at the information outputs of the settings memory unit 12 At the end of the output pulse of the one-shot 13 through the element

OR 15, the comparator 11 is allowed to work, now, at its information inputs, an Ar frame is expected from the sensors of block 10. The trigger 17 is still reset and the first key 7 is opened and on the first block 3

indication information is entered on the state of the sensors of block 10.

Thus, if the sequential transition of the monitored object from the QI-I state to the QI state occurs during a time tg shorter than the maximum permissible time 1max, then at each stage of the control, 1max is set and counter 21 is restarted and counter 16 is incremented. In this case, trigger 17 is permanently reset, and information from the sensors of block 10 is constantly inputted to the first display unit 3, and the current time reserve on the completed cycle is displayed on the second display unit 25. The monitored object sequentially passes through the states SI, 02, ...., On, after which the process repeats cyclically - due to the state Qn, the state Qi follows and so on.

If at some stage of the monitoring, the object has not passed from the Oy state to the QI state during the time t t max, i.e. If there was no positive comparison of the frames on the comparator 11, then when an overflow signal appears at the output of the counter 21, the key 18 is closed and the pulses are stopped at the input of the counter, the trigger 17 is brought into a single state, blocking further control of the counter 16 by its counter via element And 14 the entrance. A signal appears at the output of the device alarm signal 26, the operation of the NAND 6 element is enabled, and the control signals with a duty cycle of 2 are received in antiphase to the control inputs of the first 7 of the second 9 keys. alternating cycles - during the first cycle, information in the first display unit 3 is input from the sensors of unit 10 and reflects the actual state of the monitored object, during the next cycle, information is input from the settings memory unit 12 and reflects the state, Thoroe expected, but it was not achieved in a controlled object. In this case, indicators corresponding to sensors that have not transitioned to the required state go into a pulsed glow mode, providing the operator with a quick localization of the cause of the accident.

The display unit 25 also displays the current real-time countdown.

In the mode of indicating the time of the occurrence of the accident and determining the time. remainder until the normal transition to another state. The switch 23 is closed and during operation of the device, the delay element 20 generates a time delay due to the time the contents of the counter 21 are transmitted through the register 22. 5 Thus, for objects with a known cyclic sequence of changes state and normalized transition time the device allows you to automatically control

0 correct state changes and time

transition. Moreover, if a follower. the state change is broken or

allowed transit time is exceeded, then

the further monitoring process stops for 5 s, the alarm output of the device is activated, and the indicators corresponding to the sensors that are not in the required state go into the pulsed glow mode.

0On the second display unit 25, depending on the choice of the operator, either the current time reserve on the completed cycle or the time remaining until the normalized transition is displayed.

5 Claims

A device for automatic control and indication, comprising a synchronization and addressing unit, a frequency divider, an NAND element, an NAND element, a sensor unit

0 parameters, first and second multiplexers, first and second keys, first display unit, setpoint memory, first counter, comparator, single vibrator, AND element, trigger and OR element, the output of which is connected to the comparator lock input, address output of the synchronization unit and addressing is connected to the address inputs of the first display unit and the first and second multiplexers, and the clock output through a frequency divider is connected to the first input of the AND-NOT element connected to the control input of the first key by the output and through the NOT element to the control the input of the second key, the outputs of the first and

5 of the second keys are combined according to the INSTALLING OR scheme and connected to the information input of the first display unit, and information inputs - to the outputs of the same multiplexers, connected by information inputs with the outputs of the parameter sensor unit and the memory unit, respectively, also connected to the corresponding information the inputs of the comparator, the output of which through od5 the vibrator is connected to the first input of the AND element, connected by the output to the first input of the OR element and to the counting input of the first counter, the input reset cerned same name connected to the device inputs and flip-flop and the second input member

OR, and the bit output is to the bit address input of the settings memory block, the inverse trigger output is connected to the second input of element I. And the direct trigger output is the alarm output of the alarm. the circuit is connected to the second input of the NAND element, characterized in that, in order to expand the functionality of the device by monitoring the real-time occurrence of an alarm and determining the time remaining until a normal change in the state of the object by selecting the display modes, a switch is entered into the device , first and second registers, delay element, second counter, decoder, second display unit and third key, the information input of which is connected to the output of the frequency divider, controlling th

the input is to the inverse output of the trigger, and the output is to the subtracting input of the second counter, the clock input of which is connected through the delay element to the output of the element

OR and through the switch - to the enable input of the second register, the bit information inputs of which are connected to the bit outputs of the second counter, the bit setting inputs of which

connected to the bit outputs of the first register, the overflow output of the second counter is connected to the trigger installation input, the bits of the second register are connected through the decoder to the information inputs of the second display unit, and the control input of the switch is the control mode indication input of the device.