JPH0420517B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a device that monitors the status of equipment and equipment by using optical fibers to collect measurement signals.

[Prior art]

A conventional device of this type is shown in FIG. In the figure, 1 is a light receiving part for inputting measurement signals to an optical fiber, 2 is a row of optical fibers,
Or a plurality of regularly arranged optical fiber arrays, 3
is a connector that connects the optical fiber array and the line sensor, 4 is a line sensor that converts an optical signal into an electrical signal, 5 is an amplifier, 6 is an A/D converter, 7 is a storage device, and 8 is a drive circuit for the line sensor 4. , 9 is a DMA (Direct Memory) that controls the storage device.
Access) circuit, 10 is a CPU (Central Processor Unit) that performs calculation processing of measurement data, 11 is
It is a CPU bus.

Next, the operation will be explained. A large number of optical measurement signals collected via the light receiving section 1 are simultaneously transmitted in parallel through the optical fiber array 2. These optical signals reach the line sensor 4 via the connector 3. The line sensor 4 converts the optical signal into a time-series electrical signal and sends it to the amplifier 5 as an analog electrical signal. The amplified signal is converted into a digital signal by the A/D converter 6 and stored in the storage device 7 as measurement data. At this time, the DMA circuit 9 specifies the write address of the storage device 7, and functions such as prohibiting reading from the CPU 10 during the write period. The measurement data stored in the storage device 7 is transferred to the CPU bus 11 when the CPU 10 requests it.
The CPU 10 performs necessary data calculation processing.

Conventional condition measuring devices using optical fiber arrays process measurement signals from line sensors in a time-series manner as described above, so it takes time to collect measurement data, and this is difficult when the measurement target changes rapidly. However, there were drawbacks such as the inability to track data collection over time.

[Summary of the invention]

This invention was made to eliminate the drawbacks of the conventional ones as described above, and uses a photodiode array instead of a licensor, and uses an amplifier and an A/
It is an object of the present invention to provide a state measuring device using an optical fiber array that can simultaneously read measurement data at high speed by arranging a large number of D converters in parallel.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, numerals 1 to 3 and 5 to 11 are the same as those described for the conventional device shown in FIG. However, the configuration is such that a plurality of amplifiers 5, A/D converters 6, and storage devices 7 are used. 12 is a photodiode array in which photodiodes are regularly arranged corresponding to the optical fibers in the optical fiber array.

FIG. 3 shows an embodiment of the storage device 7 according to the present invention, where 21 is a memory for storing measurement data, 22 is an interface between the A/D converter 6 and the memory 21, and 23 is an interface between the DMA circuit 9 and the memory 21. 24 is an interface between the CPU bus 11 and the memory 21, and 25 is an inverter.

Next, the operation will be explained. A large number of optical measurement signals simultaneously reach the photodiode array 12 using the optical fiber array 2 as a transmission path. These optical measurement signals are each converted into independent electrical analog signals by a photodiode array and sent to an amplifier 5.
Further, the amplified signal is simultaneously converted into a digital signal by a plurality of A/D converters 6 in synchronization with the sampling timing of the DMA circuit 9, and is stored in the storage device 7.
Stored in These operations are performed in parallel at the same time by multiple amplifiers and multiple A/D converters, so even when there are a large number of measurement signals,
Measurement data can be stored in the storage device 7 in approximately the same time as when there is only one measurement signal. Further, it is possible to selectively read out only arbitrary data from the measurement data stored in the storage device 7 to the CPU 10 via the CPU bus 11.

FIG. 3 shows the storage device 7. When writing measurement data, the interface 24 is off, the inverter 25 turns on the interfaces 22 and 23, and the write address is specified from the interface 23. The measurement data is input from the interface 22 to the memory 21. on the other hand,
When reading measurement data to the CPU 10, on the other hand, the interface 24 is on and the interface 2
2 and 23 are turned off, and the interface 24
A read address is specified from , and the measurement data stored at that address is transferred to interface 2.
4 and is sent to the CPU 10 via the CPU bus 11.

In the above embodiment, a case has been described in which the photodiode array 12 is used as the photoelectric conversion section, but it goes without saying that the present invention is applicable to any photoelectric conversion element in general, not limited to photodiodes.

〔Effect of the invention〕

As described above, according to the present invention, since the analog electrical signals after photoelectric conversion are configured to be simultaneously captured in parallel, the processing time for collecting measurement data is dramatically increased, and the state changes rapidly. This effect can also be applied to other measurement targets.

In addition, the storage device that stores measurement data has a memory, an interface connected to an input/output end and a control end of this memory, and an interface connected to an input end and a control end of the memory in an on state (off state). ), the interface connected to the output end is configured with an inverter that turns off (on), so there is an effect that measurement data can be written to and read from the storage device.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the schematic configuration of a conventional state measuring device using an optical fiber array, FIG. 2 is a schematic diagram showing an embodiment of the present invention, and FIG. 3 is a block diagram showing the storage device of FIG. 2. It is a diagram. In the figure, 2 is an optical fiber array, 5 is an amplification circuit, and 6 is an optical fiber array.
is an A/D converter, 7 is a storage device, and 12 is a photodiode array. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. An optical fiber array that transmits a large number of optical signals each representing a measurement value, a photoelectric conversion element array that has photoelectric conversion elements arranged in an array for converting each optical signal into an electrical signal, and a A plurality of amplifiers that amplify electrical signals separately and independently, a plurality of A/D converters that convert the analog electrical signals amplified by the amplifiers into digital signals, and a plurality of A/D converters that separately and independently store these digital signals. storage device, and a DMA circuit that controls writing and reading to each storage device,
The storage device includes a memory, an interface connected to an input/output end and a control end of the memory, and an output end when the interface connected to the input end and control end of the memory is turned on (off). 1. A state measuring device using an optical fiber array, comprising: an inverter that turns an interface connected to an OFF state (ON state);