JPS58134304A - Monitor device - Google Patents

Abstract

PURPOSE:To monitor a fault with high accuracy with a device that integrates plural pulse input signals, by deciding a fault when a signal which is not coincident with other signals is detected and that the detected signal has no change for a period longer than a prescribed time. CONSTITUTION:Input signals UA-UC are fed to one side of each of OR elements 12-14, and the outputs of these OR elements are supplied to AND elements 15-17 and an OR element 18 which form a 2-out-of-3 circuit. Discordance detecting circuits 20-22 deliver 1 when the pulses are not coincident with each other. Timers 35-40 deliver 1 when the pulse supplies 1 for a period longer than a prescribed time. The circuits 20 and 22 are set at an output 1 with the output of an AND25 and the timer 35 set at 1 respectively when pulses UB and UC are set at 0 with only the pulse UA kept at 1. Thus it is decided that the pulse UA is faulty. An approximately similar operation is carried out when the pulses UB and UC are set at 1 with only the pulse UA kept at 0. Then it is also decided that the pulse UA is faulty. In such a way, a fault of an input signal is detected with high accuracy.

Description

[Detailed description of the invention] [Bunmei's technical field] Direct address #4 is among the output signals of the multiplexed device.

A monitoring device K11i is used to instantly detect which output No. 01 is abnormal.

[Technical background of Shumei]

Figures 1 and 2 show the configuration of a multi-unit device. In the eleventh [, J to S are, for example, sea bream # devices, and the output signals thereof are aggregated into one signal by the device 4. In addition, in Kame 2 Garden, the output signals of the control devices 1 to S are interlocked and coordinated with the timing by the devices 5 to 1, and the signals are transmitted to the next stage control devices 1l-jF. Is contracted to -1t.

An example of a device that adapts the configuration of the control device shown in Figure 2 to a control device at the edge of the shell is a t-iristor variable device.In that case, l-1 is a phase shifter that determines the firing angle. *It is a device, and its phase-direct output signal 1 (if the I4 transformer has a 6-phase bridge configuration, ignition pulses) is jlouto
Interlocked by f3fal 5-FK,
Sent to the next stage of gate goshi l1l-J#, jI! 2 out of 3 circuit 11 aggregates the signals into one signal and sends out a gate signal to the thyristor.

[Attractions of background technology]

Now, in such a configuration, for example, 1181-1I
I121N #IilJ~l (1) IBBi No. 2, or Iha No. 2-, monitors the output signals of devices 8 and 9 at peak times.

If any signal becomes abnormal, identify the abnormality accurately and promptly! f'Uw#, it is necessary to disconnect the control wire of the abnormal series or take some other measures to prevent the system from stopping. Therefore, in recent years, a monitoring device for accurately and quickly determining abnormalities in each device in multiplexed IT systems has been highly desired.

[Purpose of the invention]

Therefore, it is an object of the present invention to promptly detect the presence or absence of an abnormality in the output signal of a multi-wheel load to prevent an escalating accident. [Example of the Invention] Iris S- is a clearing device that is an embodiment of the present invention. In , one input signal of each of the OR elements 12-14 (hereinafter abbreviated as F, pulse Um, pulse U1% pulse υC) is one output signal of treatment J to 1 in 1162-, for example.・16 to 11 are AND elements, 11
1 is an OR element, and 11 is a monomultiple.As is well known, the AND element IJ~17 and the OR element 18 form a *2 out of 31 i 1 path, and in history,
When the crinkling device, which will be described later, detects an abnormality, its output signal equivalently turns the 1lout of 3 circuit into a single path with the function of an or-narrow path.

J#-xx has no intermittent inspection aii8HIe, Ah
In the case of a clause, a pulse @l" is issued.

17-77 is 1nd volume, J2 to J4 is or volume, 71 to 40 is ``,, with a timer, if the input signal is small or the pulse is ``l'' for a predetermined time or more, the pass kX ``l'' vas 41-4J are inverting elements 44-4# are flip-flops.

Next, we will discuss the effect.

Now, in such a configuration, now the pulse Um, Us,
Consider a situation where Llc is all normal and pulse l is present. At this time, each output signal of the mismatch detection circuit @go~12 is pulse 0. Further, since the set time of the timers 36 to 37 is set longer than the period of the pulse ITR11 during normal operation, the pulse 0 is still outputted. Therefore, the outputs of the AND elements 26 to 28 are all pulse 0. Also, the input signal of the timers 38 to 40 is, on the contrary, the output of the elements 41 to 4.
3 makes the pulse 0, so the output signals of the timers 38 to 40, and the output signals of the AND elements 29 to 31 become pulse 0. Therefore, the output signals of the OR elements 32 to 34 are pulse O, and the output signals of the flip-flops 41 to -9 are all not set, and all output signals are determined to be normal with pulse 0. Pulse ROM, Us, and Uc are all normal, and pulse is 0.
0'' is incremented by 4. At this time, the output signals of each of the non-descriptive detection links 10 to j2 are pulses of 0'', so the output signals of AND elements J6 to 18 are also pulses of 0. .Also, the timer 38-40(1) setting time is pulse 0.
Since it is set to be larger than the period of the state, all of its output signals are pulses 0, and therefore the output signals of AND elements 29 to 31 are also pulses of 0.Therefore, all output signals of flip-flops 41 to 4g are pulses of 0. It is determined that the pulse is normal when the pulse is 0. Now, the abnormality on the side has increased and the pulse ROM is determined to be a pulse of 1.
If the state remains, only the pulse ROM is in the pulse L state, and the pulse LJI.

Next, let us consider such a case. Now, the pulse ROM is pulse @1'', and the pulse Us and Llc hubber scale O, so the fault detection path 7G.

The output signal of the pad 2j becomes pulse 1. or.

The timer sg#) aS force signal becomes the required time-dependent pulse l, and therefore the output signals of the AND element 28 and the OR element 14 become the pulse l. Therefore, the flip-flop 4# is set and its output @ No. 1 becomes a pulse @l''. That is, the pulse ROM determines that this is the case.

If some abnormality in 4-1 occurs for a long time and the pulse ROM remains at the pulse "0", the pulse: j is arbitrary like the pulse 110II, and the pulse Uil, [JC couple''' A period of 1” state will inevitably occur. Therefore, consider a case like this.

Since pulses U and UC are normal, the output signal of monomulti 1# is normal and becomes pulse L.Flip-flops 44 to 46 are then sectored.At this time, pulse UB
, Llc is normal, so the flip-flop is 45.4
The 1 is immediately reset, but since the pulse ROM remains at the 1 in the pulse 0 state, the flip-flop 44 is not reset and its output signal remains in the pulse "1" state. Since the pulse ROM remains in the pulse @OII state, the output signal of the timer 38 becomes pulse 1 after a predetermined time, and the AND element z9. The output m of Orakako S2 is pulse 1
, the flip-flop 49 is set and the pulse ROM is judged to be abnormal. The above operation explanation is shown in the time chart for #14, JllI5-, and in the 4th-, the pulse ROM has failed in the pulse 1allK. In this case, s#A is a case where the pulse ROM fails in the pulse 0 state. Also, II
In actual equipment, control-difference and Ichiro's IIIa-
Since there are differences, the pulse ROM, Us, and Uc may not necessarily be exactly the same signal. This proposal can be applied to such cases without any problems. Therefore, in the above time chart, the pulse ROM, Us, and Uc The case where us and Llc have a g difference is described.

Other IIJll examples of this course are discussed below.

In the a-a-mentioned above, the A-um is ``1''.

This is a case assuming that any IIK with a positive pulse O fails, but depending on the configuration of the device, the probability of a failure on pulse 111 & or a failure on pulse O''- is negligible. In such cases, the monitoring device may be a device that detects only the failure of pulse 1IIll or the failure of pulse "O".

It is also clear that the process can be carried out using a soft tin salt using a microcomputer as the hotpot device.

〔Effect of 孭〕

As described above, according to the present invention, there is a function of detecting a mismatch between output signals of multiplexed devices, a function of detecting a state in which the state of the first output signal does not change for a predetermined time, By combining the memory function set by No. 4N and reset by the output signal of each Akinori device and the function of detecting a state in which the output signal does not change for a predetermined period of time, the multiplexed It is possible to detect JIJ wealth both when the device fails at pulse @1'' and when it fails at pulse 10''.
This is a unique type of koji rice that can be used to prevent system outages and widespread accidents by making full use of multiplexed koji rice.

[Brief explanation of drawings]

Rattan 11m, Tortoise 2- is a configuration of a diversified device-, 1
Figure 113 shows an example 1a of the present invention as a non-Tl1ai path diagram,
4th N, 11S- is a time chart of 3rd- J-11...device, 12-14...OR element. 15-1r...AND element, 18...OR element, 1
#...Mono multi, 34) ~ 12...Fu-print inspection ai
- Connection, 21-11...AND element, 32-J4...
OR element, 1s~40... timer, 41~4J...
・Inversion elements, 44 to 41...Flip-flock O applicant representative person quantifier Takehiko Suzue 1st wJ Figure 2 Figure 3 Figure 4 Figure 5 C&-1---------------------- −−−−−−−−−−−
-----------11--1--5

Claims (1)

[Claims] Same II! fIkl that takes multiple pulse signals with a rudder as input signals and aggregates the input m into one output flaw g
In lm, the difference between the two input signals of the w number is -1:
It detects which input signal is abnormal among the %mid input signals and determines which input signal is abnormal. In addition to having 20 mechanisms to judge that J11 is abnormal because the condition I [ does not occur within the time period, the input signal is disconnected from #4 and '44J due to the drying of lsh,
A monitoring device characterized in that the IIIA rudder of the kite 3 determines that the input signal is abnormal only when the input signal is RN and 411111r by the function of theory 2.