JP4281227B2 - Duplex measurement processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dual measurement processing apparatus in which a measurement unit used for measurement of a measurement object that requires continuous measurement is duplicated in environmental measurement and process measurement.
[0002]
[Prior art]
Conventionally, in a measurement processing apparatus that prevents measurement from being interrupted even if a failure occurs in environmental measurement or process measurement, a measurement unit 3a as shown in FIG. 9 is replaced by a measurement unit 1 system 1a and a measurement unit 2 system 2a. A duplicated measurement processing device 6a is used. In such a duplex measurement processing apparatus 6a, as shown in FIG. 9A, the measurement unit 1 system 1a is used as an operation state, and the measurement data obtained by measuring the detection signal from the sensor group 7 is used as a data recording unit such as a magnetic disk. 9a, when the other measurement unit 2 system 2a is used as a standby state and the measurement unit 1 system 1a fails, the measurement unit 2 system 2a is in an operational state as shown in FIG. 9B. The measurement of the sensor group 7 and the recording of measurement data are continued.
[0003]
[Problems to be solved by the invention]
The conventional duplex measurement processing apparatus is configured as described above, and when the measurement unit 1 system 1a has failed due to a failure as shown in FIG. 9, the measurement unit 2 system is stopped. 2a is switched from the standby state to the operational state, but since the measurement unit 2 system 2a performs measurement of signals from the sensor group 7 and transmission of measurement data after entering the operational state, the measurement unit 1 system 1a is in trouble. During the period until the measurement data is transmitted by the measurement unit 2 system 2a, there is a problem that the measurement data is lost as shown in FIG. 10 and the measurement data is discontinuous. For this reason, it cannot be used for measurement of measurement objects that require continuous data acquisition, such as pollution environment measurement, or due to lack of measurement data, it can be used for various analysis processes such as dispersion in the same time zone. There is a problem that it cannot be used.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a duplicated measurement processing apparatus that does not cause measurement data to be lost even if a measurement unit fails.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the duplex measurement processing apparatus of the present invention measures the detection signal from the sensor and transmits the measurement data, and the measurement unit of the operation state and the standby state, and the measurement of the operation state A data recording unit for recording the measurement data transmitted from the unit, and the measurement data transmitted from the measurement unit in the standby state is recorded by the data recording unit when the measurement unit in the operation state fails In the measurement processing apparatus, a temporary storage circuit for storing measurement data for a certain period in each of the two measurement units is provided, and a failure determination means for determining a failure of the measurement unit is provided in the data recording unit, so that the measurement unit for the operating state When determining the failure, the measurement data in the standby measurement unit and the measurement data stored in the temporary storage circuit are transmitted to the data recording unit and recorded. It is an butterfly.
The duplex measurement processing apparatus of the present invention is configured as described above, and can eliminate missing measurement data even if a measurement unit fails.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The structure of the Example of this invention is demonstrated based on FIGS. FIG. 1 shows a basic configuration of the embodiment. The duplex measurement processing apparatus 6 has a temporary storage circuit 16 for storing measurement data for the latest M seconds (for example, 60 seconds). The measuring unit 3 including the measuring unit 2 system 2 in the standby state having the 1 system 1 and the temporary storage circuit 26, and the measurement data transmitted from the measuring unit 1 system 1 are recorded and the failure of the measuring unit 1 system 1 is determined. The data recording unit 4 transmits a system switching signal 5 for switching the measuring unit 2 system 2 in the standby state to the operating state.
[0006]
FIG. 2 is a block diagram for explaining the configuration of the measurement unit 3 connected to the sensor group 7 (FIG. 1). The measurement unit 1 system 1 and the measurement unit 2 system 2 are configured by components having the same function. Has been.
The n sensors from the sensors 71 to 7n are connected to the input terminals of the multiplexers 11 and 21 of the measuring unit 3. The outputs of the multiplexers 11 and 21 are A / D converted by the A / D converters 12 and 22 and taken into the respective CPUs 14 and 24 through the input interfaces 13 and 23, and converted into measurement data by the arithmetic control processing. The measurement data is transmitted to the data recording unit 4 via the output interfaces 15 and 25, and the latest measurement data for M seconds is stored in the temporary storage circuits 16 and 26 using a memory. Connected to the CPUs 14 and 24 are ROMs 18 and 28 that store arithmetic processing programs for performing respective arithmetic control processing, and RAMs 17 and 27 that write and read arithmetic data.
[0007]
FIG. 3 is a block diagram showing a configuration of the data recording unit 4. The data recording unit 4 records an input interface 33 for inputting measurement data from the measurement unit 1 system 1 and the measurement unit 2 system 2 (FIG. 2), and the measurement data in a storage device 39 such as a magnetic disk. Or the presence or absence of measurement data is monitored, the failure of the measuring unit 1 system 1 is determined, and the system switching signal 5 for switching the measuring unit 2 system 2 to the operating state is transmitted to the measuring unit 3 via the output interface 35. CPU 34 for performing arithmetic control processing, ROM 38 for storing arithmetic control programs for performing arithmetic control processing, and RAM 37 for reading / writing arithmetic data.
[0008]
Next, the operation procedure by the calculation control processing of the CPUs 14 and 24 of the measurement unit 1 system 1 and the measurement unit 2 system 2 will be described with reference to the flowcharts of FIGS. As shown in FIG. 4, the CPUs 14 and 24 perform a fixed cycle for performing A / D conversion processing every fixed cycle N seconds (for example, 1 second) from a fixed cycle timer obtained by dividing each clock frequency. The A / D interrupt and the data storage interrupt waiting state of the system switching signal 5 for performing the data transmission processing of the temporary storage circuits 16 and 26 from the data recording unit 4 are in a state.
[0009]
FIG. 5 shows a flowchart of the A / D conversion process and the data transmission process from the temporary storage circuits 16 and 26.
When the CPUs 14 and 24 receive the fixed period A / D interrupt from the fixed period timer, the n sensors from the sensors 71 to 7n are sequentially switched by the multiplexers 11 and 21, and the A / D conversion converters 12 and 22 are switched. A / D conversion is performed (step S1), and then converted into measurement data and stored in the temporary storage circuits 16 and 26 (S2). Then, the data transmission state variable provided on the arithmetic control program is checked (S3), and if it can be transmitted (1), the measurement data is transmitted to the data recording unit 4. If impossible (0), the transmission is stopped (S4). This operation is repeated when the next A / D conversion processing interrupt occurs.
[0010]
Further, when the data transmission interrupt by the system switching signal 5 is received, all measurement data in the temporary storage circuit 26 is transmitted to the data recording unit 4 (S5). After the transmission of the measurement data is completed, the data transmission possible state variable on the calculation control program of the measurement unit 2 system 2 is set to possible (1), and the process is terminated (S6).
[0011]
Next, the operation procedure of the calculation control process of the CPU 34 of the data recording unit 4 will be described based on the flowchart of FIG.
As shown in FIG. 6, the data recording unit 4 waits for a data reception interrupt due to arrival of measurement data of the measuring unit 1 system 1 or a reception time-over interrupt that occurs when no measurement data is sent for M seconds. If an interrupt occurs, it is determined whether it is a data reception interrupt or a reception time-over interrupt. If this is a data reception interrupt due to the arrival of measurement data from the measuring unit 1 system 1, this measurement is performed. Data is recorded in the storage device 39. In the case of a reception time-over interrupt that occurs when measurement data is not sent for M seconds, a system switching signal is transmitted to the measurement unit 2 system 2 to bring the measurement unit 2 system 2 from the standby state. Switch to operational state.
[0012]
Transition process from the start of the dual measurement processing apparatus having the above-described configuration and calculation control function to the normal operation state, and the standby of the measurement unit 2 system 2 due to the failure of the measurement unit 1 system 1 in the normal operation state The operation of the measurement unit 1 system 1, the measurement unit 2 system 2, and the data recording unit 4 and the signal flow in the transition process from the state to the operation state will be described with reference to the block diagrams of FIGS.
As shown in FIG. 7, at the time of activation, the duplex measurement processing apparatus enables the data transmission possible state variable of the measurement unit 1 system 1 (1), and the data transmission possible state variable of the measurement unit 2 system 2 is not possible (0 ).
When the activation state is established, the measurement unit 1 system 1 is in a normal operation state, and the measurement data for M seconds is stored in the temporary storage circuits 16 and 26, and the measurement unit 1 system 1 as shown in the figure. Is sent to the data recording unit 4 in the direction of the arrow.
[0013]
When a failure occurs in the measurement unit 1 system 1, transmission of measurement data (indicated by a dotted line) from the measurement unit 1 system 1 to the data recording unit 4 is interrupted as shown in FIG. Then, a reception time over interrupt occurs after M seconds, and switching from the data recording unit 4 to the measuring unit 2 system 2 is requested by the system switching signal 5. Then, a data transmission interruption by a system switching signal is generated in the measurement unit 2 system 2, the storage circuit transmission process is performed, and measurement data of the temporary storage circuit is transmitted to the data recording unit 4. Then, the data transmission possible state is set to 1 (possible).
[0014]
Thereafter, data is transmitted from the measuring unit 2 system 2 to the data recording unit 4. Then, the data recording unit 4 recognizes the measurement unit 2 system 2 as an operating state and the measurement unit 1 system 1 as a standby state, and operates. Therefore, if the measuring unit 1 system 1 is repaired or replaced before the measuring unit 2 system 2 breaks down, even if the measuring unit 2 system 2 fails, the continuity of the measurement data can be increased by the backup of the measuring unit 1 system 1 Can be maintained.
[0015]
In the present embodiment, the measurement data is not transmitted for M seconds as the failure mode of the measurement unit. However, the failure mode in the present invention is not limited to this, and the data recording unit 4 It is possible to use another failure mode by providing, as a failure determination criterion, a case where a fluctuation of a certain width or more is maintained for a certain time in the arithmetic control program.
[0016]
【The invention's effect】
According to the duplex measurement processing apparatus of the present invention, the missing data due to the failure of the measurement unit in the operation state is stored in the temporary storage circuit provided in the measurement unit in the standby state, and this data is stored in the data recording device after switching. By transmitting the data, continuity of data can be maintained.
[Brief description of the drawings]
FIG. 1 is a basic configuration diagram of a duplex measurement processing apparatus according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of a measurement unit 1 system and a measurement unit 2 system according to an embodiment.
FIG. 3 is a block diagram illustrating a configuration of a data recording unit according to the embodiment.
FIG. 4 is a flowchart showing the operation of a measurement unit 1 system and a measurement unit 2 system.
FIG. 5 is a flowchart of A / D conversion processing and storage circuit data transmission processing according to the embodiment.
FIG. 6 is a flowchart showing the operation of the data recording unit.
FIG. 7 is a diagram illustrating a state at the time of activation and operation of the duplex measurement processing apparatus according to the embodiment.
FIG. 8 is a diagram illustrating a state when a failure occurs in the measurement unit 1 system of the duplex measurement processing apparatus according to the embodiment.
FIG. 9 is a system explanatory diagram before and after a failure of a conventional dual measurement processing apparatus.
FIG. 10 is a diagram showing a measurement result when a failure occurs in a conventional dual measurement processing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 1a ... Measurement part 1 system 2, 2a ... Measurement part 2 system 3, 3a ... Measurement part 4, 4a ... Data recording part 5 ... System switching signal 6, 6a ... Duplex measurement processing apparatus 7 ... Sensor group 11, 21 ... Multiplexers 12, 22 ... A / D converters 13, 23, 33 ... Input interfaces 14, 24, 34 ... CPU
15, 25, 35 ... output interfaces 16, 26 ... temporary storage circuits 17, 27, 37 ... RAM
18, 28, 38 ... ROM
39 ... Storage device 71, 7n ... Sensor

Claims (1)

Two measurement units for operation and standby state that can measure a detection signal from the sensor and transmit the measurement data, and a data recording unit that records measurement data transmitted from the measurement unit in the operation state, In the dual measurement processing apparatus in which the measurement data transmitted from the measurement unit in the standby state is recorded by the data recording unit when the measurement unit in the operation state fails, each of the two measurement units performs measurement for a certain period. A temporary storage circuit for storing data is provided with a failure determination means for determining a failure of the measurement unit in the data recording unit, and when the failure of the measurement unit in the operation state is determined, the measurement data of the measurement unit in the standby state and A duplex measurement processing apparatus, wherein measurement data stored in a temporary storage circuit is transmitted to and recorded in the data recording unit.

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