JPH0511676U - Submarine optical cable data collection system - Google Patents

Abstract

(57) [Abstract] [Purpose] When a new system is ordered by matching the data rates of the output data of the data collection unit and the input data of the optical transmission unit in the data collection and transmission device that constitutes the system, The designed data collection unit and optical transmission unit can be used to improve system productivity and ensure delivery time. [Structure] A data collection unit 1 for collecting environmental data of the seabed and outputting an output signal 7, a clock generation circuit 5 for generating a clock 8 at the same speed as the data speed of the optical transmission unit 2, an output signal 7 and a clock 8 And an exclusive OR circuit 6 which inputs the exclusive OR signal 9 and outputs the exclusive OR signal 9 and an optical transmission section 2 which inputs the exclusive OR signal 9 and converts it into an optical signal and outputs it to the submarine optical cable 3. There is. The frequency of the clock 8 is varied to match the data rates of the output signal 7 and the input data (exclusive OR signal 9) of the transmission unit 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a submarine optical cable data collection system, and more particularly to a data collection and transmission device installed on the seabed for observing a submarine environment and transmitting the observation data to a receiving device on land via the submarine optical cable.

[0002]

[Prior Art]

 Conventionally, the data collection and transmission device of this type of submarine optical cable data collection system has the configuration shown in FIG. In FIG. 4, a data collection unit 1 that observes the environment of the seabed, multiplexes various observation data, converts to PCM code and outputs, and a submarine optical cable that inputs this output data and converts it to an optical signal. And an optical transmission section 2 for outputting to the transmission line 3. Since the optical transmission unit 2 internally performs signal conversion, the speed of input data becomes the specified speed. Therefore, it is an absolute condition that the output data rate of the data collection unit 1 is the same as this rate.

[0003]

[Problems to be solved by the device]

 As described above, in the conventional example, since the output data rate of the data collecting unit 1 and the input data rate of the optical transmitting unit 2 must be the same, the combination of the data collecting unit 1 and the optical transmitting unit 2 is limited. Will be things. That is, when an order for a new system is received, even if the function and performance conditions are satisfied, if there is no combination of the data acquisition unit 1 and the optical transmission unit 2 that satisfy these conditions, either one must be newly designed. . For this reason, there are problems of system productivity deterioration and delivery delays.

[0004]

[Means for Solving the Problems]

 The data collecting and transmitting apparatus of the present invention includes a data collecting unit that collects the environmental data and converts it into a PCM signal, and a multi-modulating output signal of the data collecting unit with a clock having the same speed as the transmission speed of the undersea optical cable. A point sampling circuit, a clock generation circuit that generates the clock, and an optical transmission unit that converts an output signal of the multipoint sampling circuit into an optical signal and outputs the optical signal to the submarine optical cable are provided.

[0005]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of this embodiment. A data collection unit 1 that collects seabed environmental data, converts it to a PCM code and outputs an output signal 7, a clock generation circuit 5 that generates a clock 8 at the same speed as the data rate of the optical transmission unit 2, and an output signal An exclusive OR circuit 6 which inputs 7 and a clock 8 and outputs an exclusive OR signal 9, and an optical transmission section 2 which inputs the exclusive OR signal 9 and converts it into an optical signal and outputs it to the submarine optical cable 3. It consists of. The exclusive OR circuit 6 is an example for realizing a multipoint sampling circuit.

FIG. 2 is a waveform diagram showing the signal waveform of this embodiment. The output signal 7 of the data collecting section 1 is modulated by the clock 8 to become the exclusive OR signal 9, and the waveform of this exclusive OR signal 9 is a modulated wave of the same speed as the clock 8, The output signal 7 has been converted into the same speed as the data speed of the optical transmission unit 2. That is, by adjusting the clock frequency to the data rate of the optical transmission unit 2, the output signal 7 of the data collection unit 1 and the input data of the optical transmission unit 2 can be matched. In this case, the output signal 7 of the data collection unit 1 must be lower than the data rate of the optical transmission unit 2.

[0007]

[Effect of the device]

 As described above, the data collection and transmission device of the present invention adjusts the clock frequency of the clock generation circuit to the data rate of the optical transmission section 2 to output the output data rate of the data collection section and the input data of the optical transmission section. The ability to match speeds often means that when a new system is ordered, a pre-designed combination of data acquisition and optical transmission is available, which improves system productivity and delivery. This has the effect of ensuring

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of this embodiment.

FIG. 2 is a waveform diagram showing a signal waveform of this embodiment.

FIG. 3 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

 1 data collection unit 2 optical transmission unit 3 submarine optical cable 5 clock generation circuit 6 exclusive OR circuit

Claims (1)

[Claims for utility model registration] Claims: 1. A data collection and transmission device for collecting and transmitting environmental data of the seabed, a submarine optical cable for transmitting a transmission signal of the data collection and transmission device, and a transmission signal of the submarine optical cable. In a submarine optical cable data collection system comprising a data receiving device for receiving data on land, the data collecting and transmitting device collects the environmental data, and a PC
A data collecting section for converting into an M signal; a multipoint sampling circuit for modulating the output signal of the data collecting section with a clock having the same speed as the transmission speed of the submarine optical cable; a clock generating circuit for generating the clock; An optical transmission unit for converting an output signal of a point sampling circuit into an optical signal and outputting the optical signal to the submarine optical cable.