JP2591470B2 - Signal processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package for signal processing.
And a signal processing package with a circuit for detecting faults, in particular , connected in series.
And a signal processing device configured as such.

[0002]

[Prior art]

An apparatus for performing signal processing is often configured by connecting a plurality of packages in multiple stages. To detect a failure of each package in the apparatus, a predetermined monitoring signal is added to a signal to be processed. This is done by examining the contents.

With reference to FIG. 2, a description will be given of a failure detection when a monitoring signal is added only by a package at an input stage.

The transmission signal input from the input terminal 21 is
K packages 11₁Or 11 _KProcessed by
The signal is output from the output terminal 22. These packages
Package 11 in the input stage₁Has a monitoring signal
A raw circuit 12 is provided.
Is a predetermined pattern for the transmission signal input from the input terminal 21.
A monitoring signal of the monitored circuit 13 is added.₁Out to
Power.

The monitoring circuit 14 _i provided in each of the packages 11 _i (i = 1 to K) monitors the contents of the monitoring signal in the transmission signal processed by the monitored circuit 13 _i and the self-monitoring signal. The state of the monitored circuit 13 _i is determined by comparing the contents set in advance in the circuit,
If the contents are different, a signal indicating that a failure has occurred in the monitored circuit 13 _i is output to the terminal 23 _i .
The output of each monitoring circuit 14 is input to a processing device (not shown), where a package in which a fault has actually occurred is specified.

With this configuration, when a failure occurs in a certain package 11 _N , the monitoring circuit 14 _M (M> N) of the package subsequent to that package will operate even if the monitored circuit 13 _M is normal. In order to output a signal indicating that the error has occurred, it is indispensable for the processing device to perform processing for specifying the faulty package. For this reason, by adding a monitoring signal to each package, even if a failure occurs in the preceding package, it is possible to prevent the monitoring circuits in the subsequent packages from making erroneous decisions. Have been done.

[0008] Such a technique is disclosed, for example, in Japanese Unexamined Patent Publication No.
No. 358429 and JP-A-4-337937. According to the technology described in Japanese Patent Application Laid-Open No. 4-337937, when a failure occurs in a certain package, unique status information is added to the transmission signal by the package, and the status of each package is changed to the last stage. The determination is made based on the transmission signal output from the package.

[0009]

In the configuration shown in FIG. 2, it is necessary to process the outputs of the monitoring circuits in all the packages constituting the device in order to identify the package in which the failure has occurred. It takes time to identify a failed package.

On the other hand, when a circuit for adding a monitor signal to a transmission signal is provided in a package, a signal output by a monitor circuit in each package accurately indicates the state of each package. For this reason, the state of each package can be determined individually without processing those outputs by the processing circuit, and the application is superior to the case where the monitoring signal is added only by the package at the input stage. Things.

However, if a circuit for adding a monitoring signal to each package is provided in order to individually determine the operation state, the configuration of the package itself becomes complicated,
In addition to making the fabrication difficult, the unit price of the package becomes high. In addition, there is a problem that the possibility of failure increases due to the provision of the circuit.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a signal processing package which can determine the operation state of each of the components with a simple structure.

[0013]

[Means for Solving the Problems]

[0014] first aspect of the present invention, the processing circuit for performing processing on the transmission signal including the monitoring signal, inspection and process the contents of the monitoring signal in the transmission signal the processing circuit outputs is correctly receiving a monitoring circuit for outputting a state information indicating whether it is a status information output of the monitoring circuit, the transmission signal inputted to the processing circuit an input signal state information indicating whether or not normal The input signal state information is information indicating that the transmission signal is normal, and
Only when the status information is information indicating that normal processing is not being performed, a signal processing package including a determination circuit that determines that a failure has occurred in the processing circuit is provided in multiple copies.
Several stages are arranged in series, and input signal state information performs processing
A signal processing package in the stage immediately before the transmission signal is output
Status information output by the monitoring circuit
ing.

[0015] That is, in the first aspect of the present invention, the series
There is no circuit for adding a monitoring signal in each of the packages connected to the device , and it is necessary to determine whether the transmission signal containing the monitoring signal is normal by using the signal of the immediately preceding stage. place
Input signal status information output from the monitoring circuit of the management package
Is used. The input signal state information is input to the determination circuit together with the state information output from the monitoring circuit,
Only when the input signal status information is information indicating that the transmission signal is normal and the status information is information indicating that normal processing is not performed, a failure is determined. It is determined that it has occurred .

Thus, if the transmission signal input to the signal processing package already contains an error, the determination circuit does not determine that a failure has occurred, and the determination result of the determination circuit , It is possible to directly execute the countermeasures against the failure.

[0017]

[0018]

[0019]

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments.

FIG. 1 shows an outline of a signal processing apparatus using a signal processing package according to an embodiment of the present invention. Signal processing device, which only monitor signal generator 12 package 11 of the _input stage is provided, the signal processing package 11 _{j (j} ≧ 2) is located in a circuit which processes for the transmission signal It comprises a monitored circuit 13, which is also a circuit whose operation state is monitored, a monitoring circuit 14, and a determination circuit 15.

The monitoring circuit 14 checks the content of the monitoring signal in the transmission signal, and outputs a signal indicating that the content of the monitoring signal is abnormal when the content is different from a predetermined one. is there. The output of the monitoring circuit 14 _i is input to a determination circuit 15 _i provided in the same package and a determination circuit 15 _{i + 1} provided in a subsequent package.

The decision circuit 15 _i indicates that the signal output from the monitoring circuit 14 _i-1 in the preceding package is normal, and the signal output from the monitoring circuit 14 _i indicates that the signal is abnormal. Terminal 23 only if shown
to _i, and outputs a signal indicating that the package 11 _i (monitored circuit 13 _i) has failed.

In this signal processing package 11, the content of the signal output to the terminal 23 of each signal processing package 11 directly indicates the state of the internal monitored circuit 13.

In other words, according to the conventional technique in which the monitoring signal is added only by the input stage package, even if the output of each monitoring circuit indicates an abnormality, the package itself in which the monitoring circuit is provided has an abnormality. Although this did not occur, when the signal processing device was configured using the signal processing package of the embodiment, only the signal processing package in which a failure occurred outputs a signal indicating an abnormality.

[0026] For example, consider the case where a failure occurs in the monitored circuit 13 ₂ of the package 11 _2. In this case, the package 11 ₂ and subsequent monitoring circuit 14 _{j (j} ≧ 2), which will output a signal indicating that the failure has occurred, the decision circuit 15 except the judging circuit 15 ₂ is front package 1
1 of the monitoring circuit 14, the signal indicating that the state of the monitoring signal is not normal is input, the determination circuit 15 except the judging circuit 15 ₂ does not perform the output of the signal indicating that the failure has occurred, only the decision circuit 15 ₂ outputs a signal indicating that the failure has occurred.

As described above, in the signal processing package 11 of the embodiment, since the signal output from the terminal 23 directly indicates the state of the monitored circuit 13, the monitored A process of switching the circuit 13 to the spare circuit can be directly executed based on the signal.

The signal processing package of the embodiment is as follows.
Although the signal processing package provided with one set of the monitoring circuit and the determination circuit, the number of the monitoring circuit and the determination circuit to be provided in the signal processing package is not limited to one set, and the processing circuit to be monitored is not limited to one set. It should be changed appropriately according to the number of (monitored circuits).

[0029]

As described above, according to the present invention,
The operation state of each package can be determined individually without providing a circuit for adding a monitoring signal in each signal processing package.

Therefore, according to the present invention, individual signal processing
Signal that can determine the operating state of the utility package
Processing equipment can be easily manufactured,
Can be made inexpensive. In addition, failure detection
There is no need to add an output mechanism.
To improve the reliability of the signal processing device itself
Become.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an outline of a signal processing device configured by combining signal processing packages according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an outline of a conventional signal processing device that adds a monitoring signal only by a package at an input stage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Signal processing package 12 Monitoring signal generation circuit 13 Monitored circuit 14 Monitoring circuit 15 Judgment circuit 21 Input terminal 22 Output terminal 23 Terminal

Claims (1)

(57) [Claims] 1. A processing circuit for performing processing on a transmission signal including a monitoring signal, and inspecting the content of the monitoring signal in the transmission signal output by the processing circuit to indicate whether the processing is performed correctly. A monitoring circuit that outputs status information; a status signal output from the monitoring circuit; and input signal status information indicating whether a transmission signal input to the processing circuit is normal or not. Only when the information is information indicating that the transmission signal is normal and the status information is information indicating that normal processing is not performed, a failure has occurred in the processing circuit. A signal processing package having a determination circuit for determining
And the input signal state information outputs a transmission signal to be processed.
The monitoring circuit of the signal processing package in the stage immediately before
A signal processing device characterized in that the information is state information to be input.