CN217425502U - Digital optical fiber isolation oscilloscope probe - Google Patents
Digital optical fiber isolation oscilloscope probe Download PDFInfo
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- CN217425502U CN217425502U CN202123095177.9U CN202123095177U CN217425502U CN 217425502 U CN217425502 U CN 217425502U CN 202123095177 U CN202123095177 U CN 202123095177U CN 217425502 U CN217425502 U CN 217425502U
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Abstract
The utility model discloses a digital optical fiber isolation oscilloscope probe, which comprises a probe, a high-speed AD sampling device, a first optical module and a second optical module, wherein the first optical module is connected with the second optical module through an optical fiber data transmission line; the probe body is internally provided with a high-speed AD sampling module and a first optical module, the second optical module is connected with an oscilloscope, analog signals to be processed enter the probe, the high-speed AD sampling module converts the analog signals into digital signals, the first optical module performs photoelectric conversion to convert electrical signals into optical signals and transmits the optical signals to the second optical module through optical fibers, and the second optical module performs photoelectric conversion again to convert the optical signals into electrical signals and enters the oscilloscope through a digital port.
Description
Technical Field
The utility model relates to an electron measurement technical field, more specifically the saying so, it relates to a digital optic fibre isolation oscilloscope probe.
Background
The oscilloscope as a necessary instrument for an electronic laboratory can well display the relationship between current, voltage and time in a circuit through a curve. In the present day that electronic technology is continuously developed, the frequency of a circuit is continuously increased, under the condition of high frequency at GHz, some parasitic parameters brought by an oscilloscope probe can not be ignored or solved by a compensation method, and an error waveform can completely influence an engineer on the judgment of the working condition of a product circuit. At present, most of oscilloscope probes are coaxial cables used for signal transmission, the most obvious parasitic parameter of the coaxial cables is parasitic capacitance, the parasitic capacitance cannot be eliminated due to materials, and the oscilloscope probes with lower parasitic capacitance are more expensive.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art's is not enough, provides a digital optic fibre isolation oscilloscope probe that design is simple reasonable, high-speed, avoided signal interference in the transmission course.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a digital optical fiber isolation oscilloscope probe comprises a probe, a high-speed AD sampling, a first optical module and a second optical module, wherein the first optical module is connected with the second optical module through an optical fiber data transmission line; the probe body is internally provided with a high-speed AD sampling module and a first optical module, the second optical module is connected with an oscilloscope, analog signals to be processed enter the probe, the high-speed AD sampling module converts the analog signals into digital signals, the first optical module performs photoelectric conversion to convert electrical signals into optical signals and transmits the optical signals to the second optical module through optical fibers, and the second optical module performs photoelectric conversion again to convert the optical signals into electrical signals and enters the oscilloscope through a digital port.
Preferably, the device further comprises a detachable digital-to-analog conversion module, an input end of the detachable digital-to-analog conversion module is connected with an output end of the second optical module, an output end of the detachable digital-to-analog conversion module is connected with an analog input end of the oscilloscope, and the detachable digital-to-analog conversion module converts the analog signal into an analog signal and inputs the analog signal through an analog port of the oscilloscope.
Preferably, a data processing module is added between the high-speed AD sampling module and the first optical module to compress and pack data.
Preferably, a decoding module for decompressing data is added between the second optical module and the detachable digital-to-analog conversion module. Compared with the prior art, the utility model the advantage lies in:
(1) the utility model discloses structural design is simple, reasonable, and the preparation is convenient, and the practicality is strong, very easily uses widely.
(2) The utility model discloses a traditional coaxial cable transmission signal has changed into optical fiber transmission. Because the optical signal is a digital signal, parasitic capacitance can be completely eliminated, and the optical signal can be ultrahigh frequency of dozens of GHz, so that the high-frequency signal can be completely displayed on the oscilloscope without distortion. The traditional probe uses signals transmitted by a coaxial cable as analog signals, and the analog signals are extremely susceptible to interference and can be distorted in a high-frequency situation above 1G. According to the scheme, the high-speed AD sampling module and the photoelectric conversion circuit are added on the probe, and an optical signal is used as a transmission medium, so that the interference and the transmission loss in the traditional coaxial cable transmission process are avoided.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Description of reference numerals: the device comprises a probe 1, a high-speed AD sampling module 2, a first optical module 3, an optical fiber data transmission line 4, a second optical module 5, a detachable digital-to-analog conversion module 6, an oscilloscope 7 and a circuit board 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides a digital optical fiber isolation oscilloscope probe, including probe 1, high-speed AD sampling module 2, first optical module 3, second optical module 5, detachable digital analog conversion module 6, connect through optic fibre data transmission line 4 between first optical module 3 and the second optical module 5; the probe 1 is provided with a high-speed AD sampling module 2 and a first optical module 3 in a body, the output of a second optical module 5 is connected with a digital port of an oscilloscope 7, if the oscilloscope 7 does not have the digital port, the input end of a detachable digital-to-analog conversion module 6 is connected with the output of the second optical module 5, and the output end of the detachable digital-to-analog conversion module 6 is connected with the input end of the oscilloscope. Analog signals to be processed enter the probe 1, the high-speed AD sampling module converts the analog signals into digital signals, the first optical module performs photoelectric conversion to convert electric signals into optical signals and transmits the optical signals to the second optical module through optical fibers, the second optical module performs photoelectric conversion again to convert the optical signals into electric signals, the electric signals enter the oscilloscope 7 through a digital port, if the oscilloscope 7 does not have the digital port, the digital electric signals can be converted into analog electric signals through the detachable digital-to-analog conversion module, and the analog electric signals enter the oscilloscope through the port.
The utility model discloses an embodiment, in order to accelerate communication speed, increase a data processing module between high-speed AD sampling module 2 and first optical module 3, carry out processing such as compression packing to data, increase the decoding module to data decompression between second optical module and the detachable digital analog conversion module.
The high-speed AD sampling module 2 converts the acquired analog signals into digital signals. The first optical module 3 converts an electrical signal into an optical signal. The optical fiber data transmission line 4 avoids the influence of the parasitic capacitance on the electric signal.
In summary, a signal detected in the circuit board 8 to be detected enters the probe 1, the high-speed AD sampling module 2 converts an analog signal into a digital signal, and the digital signal is compressed and packaged by the data processing module and transmitted to the first optical module 3 for photoelectric conversion so as to convert an electric signal into an optical signal; and then, the information is transmitted to a second optical module 5 through an optical fiber data transmission line 4, the second optical module 5 converts the optical signal into an electrical signal through photoelectric conversion again, then decompresses the data, and inputs the digital electrical signal through a digital port of an oscilloscope 7, or converts the digital electrical signal into an analog signal through a detachable digital-to-analog conversion module 6 and inputs the analog signal through an analog port of the oscilloscope 7. It will be appreciated by those skilled in the art that the oscilloscope 7 may also be other devices to be tested, such as a PC computer.
The second optical module 5 is for being compatible with an original oscilloscope 7 in the current market, because the oscilloscope 7 in the current mainstream receives electrical signals, if the oscilloscope 7 capable of receiving the optical signals is available, the optical signals can be directly input into the oscilloscope 7, and similarly, the digital-to-analog conversion module 6 with the detachable probe tail is also for being compatible with the oscilloscope 7 without a digital port in the current market, and converting the digital signals into analog signals to be input into the oscilloscope 7.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be considered as the protection scope of the present invention.
Claims (3)
1. A digital optical fiber isolation oscilloscope probe is characterized by comprising a probe, a high-speed AD sampling unit, a first optical module and a second optical module, wherein the first optical module is connected with the second optical module through an optical fiber data transmission line; the probe is characterized in that a high-speed AD sampling module and a first optical module are arranged in the probe body, a second optical module is connected with an oscilloscope, analog signals to be processed enter the probe, the high-speed AD sampling module converts the analog signals into digital signals, the first optical module performs photoelectric conversion to convert electrical signals into optical signals, the optical signals are transmitted to the second optical module through optical fibers, the second optical module performs photoelectric conversion again to convert the optical signals into electrical signals, the electrical signals enter the oscilloscope through a digital port, the detachable digital-to-analog conversion module further comprises a detachable digital-to-analog conversion module, the input end of the detachable digital-to-analog conversion module is connected with the output end of the second optical module, the output end of the detachable digital-to-analog conversion module is connected with the input end of the oscilloscope, and the detachable digital-to-analog conversion module converts the analog signals into analog signals and inputs the analog signals through the analog port of the oscilloscope.
2. The digital fiber-optic isolation oscilloscope probe according to claim 1, wherein a data processing module is added between the high-speed AD sampling module and the first optical module to compress and pack data.
3. The digital fiber-optic isolation oscilloscope probe according to claim 2, wherein a decoding module for decompressing data is added between the second optical module and the detachable digital-to-analog conversion module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123095177.9U CN217425502U (en) | 2021-12-10 | 2021-12-10 | Digital optical fiber isolation oscilloscope probe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123095177.9U CN217425502U (en) | 2021-12-10 | 2021-12-10 | Digital optical fiber isolation oscilloscope probe |
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| CN217425502U true CN217425502U (en) | 2022-09-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115951080A (en) * | 2023-03-10 | 2023-04-11 | 中国空气动力研究与发展中心超高速空气动力研究所 | Shock tube probe speed measurement and control device based on photoelectric conversion module and velocimeter |
-
2021
- 2021-12-10 CN CN202123095177.9U patent/CN217425502U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115951080A (en) * | 2023-03-10 | 2023-04-11 | 中国空气动力研究与发展中心超高速空气动力研究所 | Shock tube probe speed measurement and control device based on photoelectric conversion module and velocimeter |
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