JPS62221737A - High-reliability signal processor - Google Patents

Abstract

PURPOSE:To equivalently attain a redundant input or output circuit by connecting the input signals having high correlation to different input circuits and the output signal of high correlation to different output circuits respectively. CONSTITUTION:The input signals I1 and I4, I2 and I5, and I8 and I8 have high correlation. Here all signals always have no high correlation and those signals of high correlation are connected to different input circuits 11 and 12. While the output signals O1 and O3 and O2 and O4 are connected to the output circuits 14 and 15 respectively. The signals I4-I8 are fetched by the circuit 12 even in case the circuit 11 has a trouble and the signals I1-I8 are lost. Thus the signals I4-I8 can be processed by a CPU 13. Furthermore a signal processor 10 can control a process equipment without receiving any effect from the circuit 14 even though the circuit 13 has a trouble.

Description

[Detailed Description of the Invention] [Field of Application in Industry-1-] The present invention improves the reliability of the entire device by increasing the reliability of the signals in a device that takes in a plurality of signals and outputs a plurality of signals. Concerning enhancing.

[Conventional technology]

Recently, the use of computers to monitor or control process equipment in plants has been actively implemented in various fields. This is because the processing power of computers can cover a wide range of functions. For example, such a gtim processing system is
l, l: (, Na1.1.

1971 p. 635-p. 641. The specific configuration of the system 11 is shown in FIG.

This system is divided into a computer section and an input/output coveredware section. 7 in the figure is a computer section, and this computer section 7 is a C
It consists of a PU 9 and an input/output interface 8.

In this case, program memory and work memory are (',
I think it is included in P U 9.

The input/output coveredware is the input/output device 1.2.
3 and input/output controllers 4, 5.6.

Here, the sensors and actuators that detect the process quantities of the plant correspond to the input/output devices 1.2.3.

By the way, human output interfaces are designed to input or output a plurality of signals using one input or output circuit in order to improve signal processing ability.

However, since the number of signal points that can be handled by one input or output circuit is limited by physical quantity, a plurality of input or output circuits are each provided. And these inputs or
The signals assigned to the output circuits only need to meet the input/output specifications, and the current situation is that signal cables are connected without paying any particular attention to them.

[Problem that the invention seeks to solve]

In order to realize a highly reliable processing system, a method is used in which sensors or actuators, which have a higher failure rate than processing devices, are made redundant.

The signal from the sensor is connected to the input circuit of the processing device,
If you connect signals from redundant sensors to one of multiple input circuits without paying special attention, as in the conventional method, these signals may be lost due to a failure of this input circuit. Put it away.

This also applies to output circuits when controlling actuators with redundancy. Here, when comparing the failure rate of CPU and input circuit or output circuit, CP t
J has a lower failure rate than these input or output circuits. That is, the reliability of the device is greatly influenced by the reliability of the input or output circuit. Therefore, as mentioned above, even if sensors or actuators are made redundant, if one input or output circuit fails, the signal from the redundant sensor or the signal to the redundant actuator will be lost, and the sensor or actuator will be lost. Alternatively, there is a problem that the effect of making the actuators redundant cannot be obtained.

The present invention has been made in view of the above points, and its purpose is to equivalently create a redundant configuration for the input or output circuit of a signal processing device using the same amount of hardware as the conventional device. The purpose of the present invention is to provide a signal processing device with higher reliability.

[Means for solving problems]

In a signal processing device that inputs or outputs a plurality of signals, the present invention connects highly correlated input signals to separate input circuits, and connects highly correlated output signals to separate output circuits. By configuring the signal processing apparatus as described above, the reliability of the signal processing apparatus is improved by equivalently achieving redundancy of input or output circuits.

[Effect]

By configuring the signal processing device as described above, even if one input or output circuit fails, one of the redundant signals will not be lost, which improves the reliability of the signal processing device. It is economical because it can be realized with the same amount of hardware as a conventional processing device.

〔Example〕

Hereinafter, specific embodiments of the present invention will be described in detail using the drawings. Equally numbered parts in each drawing indicate equivalent parts.

FIG. 1 shows a basic embodiment of the present invention,
10 is a signal processing device using computer processing. This signal processing device 10 receives input signals Tl to 6 to input circuits 11. ．．
1.2, the CPU 13 processes the captured signals, and outputs them as output signals Or to 04 from the output circuit 14.1-5. The signals having a strong correlation among the signals are connected to the input circuit or the output circuit in the following manner. It is assumed that the CPU 13 has various types of memories, as in the conventional example.

Here, we will discuss the correlation of signals. When the two signals are x (t) * y (t) and the correlation function of these two signals is R, R is generally given by the following equation.

However, τ: time difference when shifting the relationship between X and y (-00<τ<+00) This is illustrated in FIG. 3. In this example, it can be said that when τ is T1, the correlation between the two signals is high. In other words, when τ is Tz, the signals x (t) and y (
This means that the pattern t) matches the best. Therefore, the output signal from the redundant sensor is τ=O
It can be said that the signals are highly correlated. Generally, redundant sensors have approximately the same time constant. Therefore, the correlation of the signals from the redundant sensors is ]. In other words, they always match.

Furthermore, since the output signal to be output to the redundant actuator is created based on one result obtained by the processing of CP TJ 13, the correlation between these signals is 1, and they always match. There is.

By utilizing these characteristics, it is possible to configure a signal processing device and increase the reliability of the device. Generally, various signal processing devices such as control devices and measuring devices used in various fields have a large number of signal input/output points. As the scale of a system to which a signal processing device is applied increases, the number of input/output points of the signal processing device also increases. Therefore, the number of input or output circuits is 1
One circuit (input or output board) cannot handle input/output signals, and multiple input or output circuits are used.

In the embodiment shown in FIG. 1, redundant signals are assigned to different circuits among the plurality of input or output circuits. Here, the input signals 11 and 14 are highly correlated signals, I2 and TR, and TR and I8 are also highly correlated signals. Although not all signals are necessarily highly correlated, these highly correlated signals are configured to be connected to separate input circuits], i, and 12, respectively. Furthermore, regarding the output signals, highly correlated signals 01 and 08,
02° and 04 are connected to each output circuit 14.15.

For example, TI and I4. I2 and Tb, Ia and I6 are redundant sensor signals, respectively, or 01 and 08°0
Considering that 2 and 04 are the output signals to the redundant actuators, if the input circuit 11 fails, the input signals 11 to 04
(2) Even if 8 is lost, T4 to Te are taken in by the input circuit 12 and can be processed by CP tJ i 3. Therefore, the processing device 10 can continue processing without being affected by the failure of the input circuit 11. Furthermore, even if the output circuit 14 fails, the signal processing device 10 can control the process equipment without being affected by the failed circuit.

As described above, by actively utilizing signal redundancy to configure the device, the reliability of the device can be greatly improved.

FIG. 4 shows a configuration example in which the present invention is applied to a signal transmission device, and 7 is the transmission device. The transmission device "-7 sends input signals 11 to ■6 to separate input circuits 1i for highly correlated signals.
. Even in this case,
As described above, by utilizing signal redundancy to capture highly correlated signals in separate circuits, the reliability of the entire transmission device can be improved. Although FIG. 4 shows a transmission device, the present invention can be similarly applied to a receiving device by completely reversing the signal flow. In this case, the circuits 11 and 1.2 are used as output circuits, and the signal Iz~
■If we consider 6 as an output signal and 16 as a receiver,
It's easy to understand.

In the previous examples, the input signal or output signal was a signal from a redundant sensor or a redundant actuator. It is not limited to this. Figure 5 is a simple representation of a nuclear reactor in a nuclear power plant.
18 is a nuclear reactor, 19 is a neutron flux detector, and 20 is a core pressure gauge. In the case of a nuclear reactor, as the core pressure increases, the amount of voids generated decreases and the neutron flux increases. Therefore,
Both detection signals have a very high correlation. Therefore, even in such a case, as shown in Figure 1, separate six Hnl
The reliability of the signal processing device can be improved by connecting signal cables to each input circuit so that the neutron flux detection signal and the core pressure signal are assigned to each input circuit. Additionally, these signals are important for protection in the event of a plant abnormality, and assigning these signals to independent input circuits using the method described above will greatly contribute to improving the system reliability of the entire plant. .

Figure 6 shows the configuration of a signal processing device that handles a very large number of signals.It is basically the same as Figure 1, but the number of input or output circuits is only one input/output signal.
The number increases in proportion to the number of 1 to Ill and Of to 06. In such a case, the configuration is such that the signals are connected to separate circuits in the order of signals with high correlation. Now, if we consider the input signals, for example, the correlation between input signal 11 and Step 4 is 1, the correlation between I1 and I7 is 0.8, and the correlation between If and 12 is 0.
．． 2, separate input circuits 11.1, I4, and I7 are provided. ．． 12.20, and I2, which is a signal with low correlation with Il, is connected to the input circuit 11.

In this way, the configuration is such that signals are assigned to different input circuits in the order of high correlation. The same applies to the output circuits, and the output signals Os to 08 are assigned to the output circuits 14 to 21 in descending order of correlation.

By configuring the signal processing device to allocate input or output signals to human input or output circuits in descending order of correlation, the reliability of the signal processing device can be improved with the same amount of hardware as the conventional hardware. It is very effective and can increase the degree of

It is easy to understand that what has been described above applies to both analog and digital signals, and can be applied to various fields.

〔Effect of the invention〕

As described above, according to the present invention, the hardware of the input or output circuit in a signal processing device is not made redundant, but the amount of hardware is the same as that of the conventional one by utilizing signal redundancy. The reliability of the signal processing device can be increased by the amount of . Therefore, it is possible to provide a highly reliable device at a low cost, and its industrial value is great.

[Brief Description of the Drawings] Fig. 1 is a basic configuration diagram of an embodiment of the present invention, Fig. 2 is a block diagram showing a conventional example, Fig. 3 is a diagram showing signal correlation, and Fig. 5 is a diagram showing a conventional example. A cross-sectional diagram that simply shows the structure of a nuclear reactor.
4 and 6 are block diagrams of other embodiments of the present invention. 11.1.2.20...Input circuit, 14. -1.5.
21...Output circuit, Tt"To...Input signal, 01
~06...Output signal.

Claims (1)

[Claims] 1. In a device that inputs and processes multiple signals or outputs multiple signals, connect signals with a high correlation between the input signals to separate input circuits, and connect the signals with a high correlation between the input signals to separate input circuits, and A highly reliable signal processing device characterized by being configured so that high signals are connected to separate output circuits.