CN211830787U - Optical fiber network acquisition instrument based on wavelength division multiplexing transmission - Google Patents
Optical fiber network acquisition instrument based on wavelength division multiplexing transmission Download PDFInfo
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- CN211830787U CN211830787U CN202020684798.7U CN202020684798U CN211830787U CN 211830787 U CN211830787 U CN 211830787U CN 202020684798 U CN202020684798 U CN 202020684798U CN 211830787 U CN211830787 U CN 211830787U
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Abstract
The utility model provides an optical network gathers appearance based on wavelength division multiplexing transmission. The utility model comprises an instrument amplifier, an AD converter, an FPGA processor, an ARM processor, a light-to-Ethernet module, a light-to-TTL module and a wavelength division multiplexer; the instrumentation amplifier connects the AD converter, the FPGA treater is connected to the AD converter, the ARM treater is connected to the FPGA treater, the ARM treater passes through the light and changes ethernet module connection wavelength division multiplexer. The utility model discloses an optical fiber communication technique, with giga net gape, USB mouth or serial ports communication of conventionality, stability is higher, and the interference killing feature is stronger, and transmission distance is farther.
Description
The technical field is as follows:
the utility model relates to an optical network gathers appearance based on wavelength division multiplexing transmission belongs to collection appearance technical field.
Background art:
the rotating signal test is normally carried out by using the conductive slip ring, but because an air compressor or a liquid pump works on site, a conventional 380V or 220V strong electric cable is close to an analog cable, and interference signals are generated. Therefore, in general field electrical layout, a strong current cable and a weak current cable are required to be separately wired, and parallel wiring is avoided, so that interference signals are avoided, wiring is complex, cable cost is high, and troubleshooting workload is large.
The invention content is as follows:
the utility model aims at the problem that exists provides an optical fiber network gathers appearance based on wavelength division multiplexing transmission, directly truns into actual measurement analog signal at the sensor front end into digital signal and transmits, utilizes the optic fibre communication, has improved the interference killing feature of system, adopts wavelength division multiplexing technique simultaneously, and the while transmission of multiple signal has just been solved to an optical fiber cable. The optical signals modulated into different wavelengths are transmitted, and the optical signals are demodulated and restored into original signals at a far end, so that the cost of the cable is reduced, the cable is simplified, the troubleshooting time of a system is shortened, and the testing efficiency is improved.
The above purpose is realized by the following technical scheme:
an optical fiber network acquisition instrument based on wavelength division multiplexing transmission comprises an instrument amplifier, an AD converter, an FPGA processor, an ARM processor, an optical-to-Ethernet module, an optical-to-TTL module and a wavelength division multiplexer; the instrumentation amplifier connects the AD converter, the FPGA treater is connected to the AD converter, the ARM treater is connected to the FPGA treater, the ARM treater passes through the light and changes ethernet module connection wavelength division multiplexer.
The optical fiber network acquisition instrument based on wavelength division multiplexing transmission also comprises a TTL module, and the wavelength division multiplexer is connected with the FPGA processor through a light-to-TTL module.
The optical fiber network acquisition instrument based on wavelength division multiplexing transmission adopts an AD8253 type instrument amplifier, and has three-gear switching amplification of 1 time, 10 times and 100 times.
According to the optical fiber network acquisition instrument based on wavelength division multiplexing transmission, the AD converter adopts an AD7609 type AD converter, the AD converter is provided with an 8-channel differential DAS, and an 18-bit bipolar 200kSPS synchronous sampling ADC is arranged in the AD converter.
According to the optical fiber network acquisition instrument based on wavelength division multiplexing transmission, the FPGA processor adopts an EP4CE15F17 type FPGA processor.
The optical fiber network acquisition instrument based on wavelength division multiplexing transmission is characterized in that an STM32F407 type ARM processor is adopted as the ARM processor.
Has the advantages that:
1. by adopting the optical fiber communication technology, the optical fiber communication device is communicated with a conventional gigabit network port, a USB port or a serial port, so that the stability is higher, the anti-interference capability is stronger, and the transmission distance is longer.
2. By adopting the wavelength division multiplexing technology, various optical signals can be reliably transmitted, the integration level is higher, and the field cable is simpler.
3. Gather the built-in light of appearance and change TTL module, light and change ethernet module, wavelength division multiplexer, fuse multiple technique together, provide the powerful guarantee to the reliable transmission of rotation signal.
Description of the drawings:
fig. 1 is a block diagram of the application of the present invention.
Fig. 2 is a wavelength division multiplexer band allocation diagram of the present invention.
The specific implementation mode is as follows:
example 1:
as shown in fig. 1-2: the optical fiber network acquisition instrument based on wavelength division multiplexing transmission comprises an instrument amplifier, an AD converter, an FPGA processor, an ARM processor, an optical-to-Ethernet module, an optical-to-TTL module and a wavelength division multiplexer; the instrumentation amplifier connects the AD converter, the FPGA treater is connected to the AD converter, the ARM treater is connected to the FPGA treater, the ARM treater passes through the light and changes ethernet module connection wavelength division multiplexer.
The instrumentation amplifier in this embodiment: the model AD8253 defaults to 1 time, 10 times and 100 times of three-gear switching;
the AD converter in the present embodiment: the model AD7609, 8-channel differential DAS is internally provided with 18-bit bipolar 200kSPS synchronous sampling ADCs of all channels;
the FPGA in this embodiment: the model EP4CE15F17 controls the reliable transmission of TTL sampling pulses;
the ARM in this embodiment: the model STM32F407 mainly functions network communication, channel control, channel information processing, and data processing.
The working process is as follows: the sensor signal is gain amplified by the instrument amplifier, analog-to-digital conversion is carried out by the AD converter, the ARM is sent to the Ethernet light conversion module through the network port, and data is transmitted to a remote computer through the optical fiber, the optical fiber slip ring and the optical fiber Ethernet module. The sampling pulse can be controlled by an instrument crystal oscillator clock, and can also be controlled by external TTL1 and TTL 2.
If the optical fiber network acquisition instrument uses an internal crystal oscillator clock as a sampling pulse, optical fiber communication is only a communication function, data interaction (sending and receiving) is carried out by adopting two wavelengths of 1510nm and 1530nm, and if an external TTL signal is used as the sampling pulse, two wavelengths of 1550nm and 1570nm are added to carry out 2-path transmission of the TTL signal. The OP-CWDM-4-FC is arranged in the optical fiber network acquisition instrument, and can realize the transmission of 2 paths of TTL signals and network data signals with an external CWDM Module only by relying on one optical fiber.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the technical means, but also comprises the technical scheme consisting of the equivalent replacement of the technical features. The present invention is not to be considered as the best thing, and belongs to the common general knowledge of the technicians in the field.
Claims (6)
1. An optical fiber network acquisition instrument based on wavelength division multiplexing transmission is characterized in that: the system comprises an instrument amplifier, an AD converter, an FPGA processor, an ARM processor, an optical-to-Ethernet module, an optical-to-TTL module and a wavelength division multiplexer; the instrumentation amplifier connects the AD converter, the FPGA treater is connected to the AD converter, the ARM treater is connected to the FPGA treater, the ARM treater passes through the light and changes ethernet module connection wavelength division multiplexer.
2. The optical fiber network acquisition instrument based on wavelength division multiplexing transmission according to claim 1, wherein: the wavelength division multiplexer is connected with the FPGA processor through the optical to TTL module.
3. The optical fiber network acquisition instrument based on wavelength division multiplexing transmission according to claim 1, wherein: the AD8253 type instrument amplifier is adopted as the instrument amplifier, and the three-gear switching amplification of 1 time, 10 times and 100 times is realized.
4. The optical fiber network acquisition instrument based on wavelength division multiplexing transmission according to claim 1, wherein: the AD converter adopts an AD7609 type AD converter, has an 8-channel differential DAS, and is internally provided with an 18-bit bipolar 200kSPS synchronous sampling ADC of all channels.
5. The optical fiber network acquisition instrument based on wavelength division multiplexing transmission according to claim 1, wherein: the FPGA processor adopts an FPGA processor of an EP4CE15F17 type.
6. The optical fiber network acquisition instrument based on wavelength division multiplexing transmission according to claim 1, wherein: the ARM processor adopts an STM32F407 type ARM processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020684798.7U CN211830787U (en) | 2020-04-29 | 2020-04-29 | Optical fiber network acquisition instrument based on wavelength division multiplexing transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020684798.7U CN211830787U (en) | 2020-04-29 | 2020-04-29 | Optical fiber network acquisition instrument based on wavelength division multiplexing transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211830787U true CN211830787U (en) | 2020-10-30 |
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| CN202020684798.7U Active CN211830787U (en) | 2020-04-29 | 2020-04-29 | Optical fiber network acquisition instrument based on wavelength division multiplexing transmission |
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2020
- 2020-04-29 CN CN202020684798.7U patent/CN211830787U/en active Active
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