CN109357841B - On-site protection prefabricated optical cable checking device - Google Patents
On-site protection prefabricated optical cable checking device Download PDFInfo
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- CN109357841B CN109357841B CN201811219233.5A CN201811219233A CN109357841B CN 109357841 B CN109357841 B CN 109357841B CN 201811219233 A CN201811219233 A CN 201811219233A CN 109357841 B CN109357841 B CN 109357841B
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Abstract
The invention relates to the technical field of optical cable verification devices, in particular to an on-site protection prefabricated optical cable verification device, and specifically relates to an on-site protection prefabricated optical cable verification realization method applied to the technical field of intelligent power grids. The invention comprises a transmitting end light source device and a receiving end light power meter device; the transmitting end light source device comprises a local source test port and a prefabricated optical cable test port, the local source test port is connected with the first receiving end optical power meter device, the prefabricated optical cable test port is connected with a prefabricated interface of the tested optical cable, and the tested optical cable dispersion port is connected with the second receiving end optical power meter device; the first receiving end optical power meter device and the second receiving end optical power meter device are connected through a wireless autonomous network. The optical loss testing device has the advantages of simple structure, small optical loss error and comprehensive and scientific testing result. The method is beneficial to comprehensively analyzing the optical cable performance and the requirements of special optical cable modes, saves the test time, avoids the influence of differential loss, can be used for testing multiple optical fiber bundles, and solves the problem of difficult verification of the on-site protection prefabricated optical cable.
Description
Technical Field
The invention relates to the technical field of optical cable verification devices, in particular to an on-site protection prefabricated optical cable verification device, and particularly relates to an on-site protection prefabricated optical cable verification realization method applied to the technical field of intelligent power grids.
Background
The in-situ relay protection device is a new form of relay protection of a third-generation intelligent substation of a national power grid company, and is a new direction of the development of the relay protection device in the future. The prefabricated optical cable is an important matching link for on-site protection, and the inspection work of the prefabricated optical cable becomes one of important contents of the on-site inspection work of the on-site relay protection device and is also one of key factors for improving the operation and maintenance efficiency of the relay protection site. The prefabricated optical cable matched with the on-site relay protection device is single-ended and prefabricated, the other end of the prefabricated optical cable is dispersed, the on-site unavailable inspection device detects technical indexes such as correctness of an optical loop and optical power attenuation, and the special mode of on-site installation causes that not only environmental climate greatly affects the operation of on-site personnel, but also the lighting confirmation of a light source sent from the opposite side is difficult to realize during daytime operation, and the operation efficiency and quality are seriously affected.
In order to realize detection of the prefabricated optical cable of the on-site relay protection device, light sources are sequentially driven into cores in single-end prefabricated ports, and connecting wires of the type cannot be found in the market at present. How to solve and design the light source aiming at the single-end prefabricated light source becomes an important link of on-site protection detection work; in addition, the types of the on-site protection optical cable ports in the smart grid field are not unified at present, and most of the on-site protection optical cable ports are LC and ST ports. Therefore, the optical power meter port for testing also adopts a flexible and switchable interface, so that the optical power meter port can adapt to different requirements of the field; the two problems are solved, and the method has stronger practical significance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an on-site protection prefabricated optical cable verification device, which aims to provide a verification device with simple structure and small optical loss error and convenient for remotely testing an optical cable set, is used for verifying and testing on-site protection prefabricated optical cables in an intelligent transformer substation, can detect technical indexes such as correctness of an optical loop and optical power attenuation, and fills the technical blank of no such test line at present.
In order to achieve the aim of the invention, the invention is realized by the following technical scheme:
the in-situ protection prefabricated optical cable checking device comprises a transmitting end light source device and a receiving end optical power meter device; the transmitting end light source device comprises a local source test port and a prefabricated optical cable test port, one group is used for in-situ prefabricated optical cable test, and the other group is used as the local source test port; the local source test port is connected with a first receiving end optical power meter device, and the first receiving end optical power meter device measures 16 paths of original signal values of the light source and stores the original signal values as reference comparison values; the optical cable test port is connected with the optical cable test port to be tested, the optical cable dispersion port to be tested is connected with the optical power meter device at the second receiving end, and the optical power meter device at the second receiving end is used for measuring the signal value of the light source after the optical cable transmission and storing the signal value as a test data value; the first receiving end optical power meter device and the second receiving end optical power meter device are in communication connection through a wireless autonomous network, and the first receiving end optical power meter device and the second receiving end optical power meter device are mutually and respectively stored with the test values, so that the first receiving end optical power meter device and the second receiving end optical power meter device both have the original light source values and the optical cable signal values, and respectively draw and display comparison diagrams of the original values and the test values in a man-machine interface of a liquid crystal screen.
The transmitting end light source device comprises a laser, a current regulation control circuit, an optical switch and a branching device; the laser generates stable light sources, a control input port of the laser is connected with a current regulation control circuit, and the laser generates a plurality of groups of light sources with linear variable power through the regulation of the current regulation control circuit to generate comprehensive test source data; the output port of the laser is connected with the optical switch, and 1X16 paths of switching channel output is realized through the optical switch; the 16-path output interface is connected with a 1X2 optical splitter, two groups of identical 16-path channels are obtained through the optical splitter, and a group of the 16-path channels form a local test port and are used for a receiving end optical power meter to obtain an original value of a test light source; the other group forms a prefabricated female interface for connecting and testing with the prefabricated optical cable to be tested, the prefabricated female interface is used as a final output interface of the transmitting end light source device, and the final output interface is an interface matched with the in-situ protection single-end prefabricated interface; the prefabricated female head is connected with the single-end prefabricated part of the on-site protection optical cable and is used as an excitation source; the LC port to be tested is connected with a host computer of the receiving end, and the host computer measures an original value; the other end of the local protection optical cable is connected with a receiver host through a dispersion port, and the host acquires a test value; the original value and the test value are obtained by testing the same host computer, and the host computer displays a comparison graph of the original value and the test value in a human-computer interface of a liquid crystal screen.
The laser sends a fixed power light source to serve as a test source of the tested on-site protection optical cable; in addition, the current regulation control circuit regulates the function, so that a fixed power light source is generated, a laser sends a variable power light source, and different application scenes are simulated; the optical switch is 1-16 paths, is used for testing multiple optical fiber bundles, and can finish the on-site scattered 16 paths of optical cable test in one test; the splitter splits an output line of the optical switch, one path is used as test excitation to the tested prefabricated optical cable head, and the other path is used as a test port to provide an original value of a test light source.
The receiving end optical power meter device comprises an optical power meter and an intelligent handheld terminal; the optical power meter is provided with an optical cable input interface, and is compatible with the access of various optical fiber heads; the optical power meter performs AD conversion on an analog signal input by the optical cable to form a digital signal, and outputs the digital signal in a digital interface form; the interface is connected with an input interface of the intelligent handheld terminal, the intelligent handheld terminal acquires a digital signal value, and the digital signal value is finally displayed on a man-machine interaction interface of a liquid crystal screen of the intelligent handheld terminal through calculation and comparison; the optical power meter consists of a conversion connector and an optical collector, which are combined together by adopting a screw knob; the light source output port of the transmitting end is connected with the protecting single-end prefabrication port, and the dispersing port at the other end of the protecting optical cable is connected with the host computer of the receiving end, so that a closed loop test is formed; the intelligent handheld terminal is a testing host, the optical port number of the light received by the testing host is displayed on a host liquid crystal screen, and the testing host measures and calculates the optical power attenuation; the receiving end optical power meter devices have wireless transmission functions and can be used for simultaneously testing one receiving end optical power meter device to obtain the current power value of the light source, the other receiving end optical power meter device tests the power value of the light source after the light source passes through the prefabricated optical cable, the two receiving end optical power meter devices exchange data with each other through wireless transmission, the data before and after the prefabricated optical cable can be calculated and displayed, and the two receiving end optical power meter devices can synchronously obtain the test result.
And if the two ends of the tested optical cable are far away, the original value and the test value are respectively obtained by testing the two hosts, the two hosts transmit and exchange the respectively obtained test values with each other through a wireless transmission function, and finally the two hosts both have the original value and the test value and can be used for drawing and displaying a comparison graph of the original value and the test value in a human-computer interface of a liquid crystal screen.
The interface of the transmitting end light source device is introduced with a 1-16-path optical switch, a prefabricated end female head interface is adopted, and the prefabricated interface of the on-site protection optical cable is matched; the transmitting end supplies light sources for the tested optical cable, can acquire the original DB value of the current light source, introduces a 1-to-2-split light splitter, and the split light sources are sent to the tested optical cable in one path and sent to the receiving end host in the other path to acquire the current original DB value; internal structure of transmitting end light source device: the laser generates stable light source, the stable light source is regulated by the current regulating control circuit to be converted into a plurality of groups of light sources with linear variable power, thus providing comprehensive test original data, then providing the light source to the optical switch, realizing 1X16 paths of switching channels by the optical switch, obtaining 2 groups of identical 16 paths of channels by the optical splitter, forming a group of prefabricated female heads for the tested prefabricated optical cables, and forming a group of LC ports to be tested for the receiving end host to obtain the original value of the test light source.
The receiving-end optical power meter device is characterized in that a receiving-end host is used for various optical cable interface types of an intelligent substation, the receiving-end optical power meter device is composed of an interface converter and an optical detector, and the interface converter and the optical detector are combined together by a screw knob.
The receiving end host of the receiving end optical power meter device covers a wireless communication function and is used for directly carrying out wireless data transmission by a plurality of receiving hosts; one host can obtain a test original value at the input light source end of the tested optical cable, the other host obtains a test actual value at the output end of the tested optical cable, and the two hosts interact the obtained values respectively through wireless communication, and draw and display a comparison graph of the original value and the actual value on a human-computer interface on each liquid crystal screen; firstly, an optical power meter detects an input light source, AD conversion is carried out, the value is transmitted to a CPU module, and the CPU module stores a final test actual DB value after data conversion and transportation; the wireless communication module obtains an original DB value measured by the host at the other end through an instruction and transmits the original DB value to the CPU module for storage; the CPU module retrieves the stored original value and the actual value and displays the original value and the actual value through the liquid crystal display human-computer interface.
The optical switch at the transmitting end of the transmitting end light source device is divided into 1-way and 16-way, one end of the optical switch is connected with 1-way light source, and the other end of the optical switch is output by a selectable 16-way channel through branching control of the optical switch, so that the optical switch meets the multi-core testing requirement of an on-site optical cable prefabricated port; the optional 16 paths of channels obtained through the optical switch are separated into a 16-core single-end prefabricated female head and 16 paths of LC ports to be tested through a splitter, and the two ports are used as final output interfaces of a transmitting-end light source; the single-end prefabricated female head is used for testing the single-end prefabricated optical cable of the in-situ protection optical cable; the LC port to be tested obtains the original DB value of the current transmitting end light source for testing; the receiving end host can obtain the original DB value of the current test through the port and store the original DB value; the tested local protection optical cable dispersion end is connected to the host optical power detection port of the receiving end, the data acquired by the optical power meter is transmitted to the host CPU, and the final DB value is obtained through conversion and calculation; the method comprises the steps that an optical switch is switched at a transmitting end, a receiving end host is used for testing 16 paths of different DB values scattered by an on-site protection optical cable and storing the values; the host computer calls out the stored 16 paths of original values and test values, and the values are respectively displayed on the liquid crystal display through drawing.
When the two ends of the local protection optical cable are far away, two receiving end hosts are adopted, one host is tested and obtains an original value at a transmitting end light source, the other host is tested and obtains a test value at a local protection optical cable testing end, finally the two hosts exchange DB values obtained by themselves through a wireless transmission function, and both can draw a comparison graph of the original value and the test value on a liquid crystal screen of the two hosts, so that an optical cable testing result is displayed.
The invention has the following advantages and technical effects:
(1) The invention introduces a current regulation control circuit into the light source at the transmitting end, and the laser can transmit a fixed power light source as a test source, and can also be controlled by the circuit through current to transmit a linear variable power light source as the test source; the multiple groups of linear variable power light sources are used as test sources, so that the test method is more in line with actual matters, the test result is more comprehensive and scientific, and the comprehensive analysis of the performance of the optical cable is facilitated.
(2) The invention introduces the optical switch into the light source of the transmitting end, produces the single-end prefabricated female head, completely accords with the single-end prefabricated interface of the on-site protection optical cable, and solves the requirement of the special optical cable mode. In addition, the optical switch switches the optical path, so that the test time is saved, and the influence of differential loss caused by plugging and unplugging the optical fiber is avoided. The method can be used for testing multiple optical fiber bundles, and solves the problem of difficult verification of the on-site protection prefabricated optical cable.
(3) The invention introduces the combination of the knob adapter and the optical detector in the host computer at the receiving end, and can replace various different optical fiber link interfaces, such as an LC conversion head, an ST conversion head, an FC conversion head, an SC conversion head and the like, thereby being suitable for different application interface requirements of the intelligent substation.
(4) The invention integrates the wireless transmission function into the host at the receiving end, thereby being convenient for testing the optical cable set in a long distance. One receiving end device can test the power value of the light source, the other receiving end device tests the power value of the light source after passing through the optical cable, the obtained data are transmitted to the other party through wireless transmission, and the values before passing through the optical cable and after passing through the optical cable are compared and displayed through the powerful calculation and drawing functions of the receiving end device, so that the device has the characteristics of strong intuitiveness and complete and comprehensive test for the whole verification work.
(5) The checking device also has the advantages of simple hardware structure and small optical loss error.
In order to facilitate the understanding and practice of the invention, those of ordinary skill in the art will now make further details with reference to the drawings and detailed description, it being understood that the scope of the invention is not limited to the specific description.
Drawings
FIG. 1 is a diagram showing the internal structure of a transmitting-end light source according to the present invention;
FIG. 2 is a diagram showing the internal structure of the receiving-end optical rate meter according to the present invention;
FIG. 3 is a diagram of a field test connection of the present invention.
In the figure: a first receiving-end optical power meter device 1, and a second receiving-end optical power meter device 2.
Detailed Description
The invention relates to an on-site protection prefabricated optical cable checking device, as shown in fig. 3, and fig. 3 is a wiring connection diagram for checking on-site protection prefabricated optical cables. The invention is used for checking and testing the on-site protection prefabricated optical cable in the intelligent substation, and can detect the technical indexes such as optical loop correctness, optical power attenuation and the like.
The device comprises a transmitting end light source device and a receiving end light power meter device.
The transmitting end light source device comprises two groups of interfaces, one group is used for testing the prefabricated optical cable in situ, and the other group is used as a local source testing port; the local source test port is connected with the first receiving end optical power meter device 1, and the first receiving end optical power meter device 1 can measure 16 paths of original signal values of the light source and store the original signal values as reference comparison values. The prefabricated optical cable test port is connected with the prefabricated interface of the tested optical cable, and the dispersion port of the tested optical cable is connected with the second receiving end optical power meter device 2. The second receiving-end optical power meter device 2 can measure the signal value transmitted by the optical cable through the optical source and store the signal value as the test data value. The first receiving-end optical power meter device 1 and the second receiving-end optical power meter device 2 are in communication connection through a wireless autonomous network, and the respective stored test values are interacted. Therefore, both the liquid crystal display screen has the original value of the light source and the signal value of the optical cable, and the comparison graph of the original value and the test value can be respectively drawn in the man-machine interface of the liquid crystal display screen, so that the test result is visual and clear.
As shown in fig. 1, fig. 1 is an internal structure diagram of a transmitting-end light source according to the present invention. The transmitting-end light source device comprises a laser, a current regulation control circuit, an optical switch and a branching device.
The laser may produce a stable light source with a control input connected to a current regulation control circuit. The laser can generate a plurality of groups of linear variable power light sources through the adjustment of the current adjustment control circuit, so that comprehensive test source data can be generated, and the test is more scientific. The output port of the laser is connected with the optical switch, and 1X16 paths of switching channel output can be realized through the optical switch. The 16-path output interface is connected with a 1X2 optical splitter, two groups of identical 16-path channels are obtained through the optical splitter, and a group of the 16-path channels form a local test port and are used for a receiving end optical power meter to obtain an original value of a test light source; the other group forms a prefabricated female head interface for connecting and testing with the prefabricated optical cable to be tested. The prefabricated female head interface is used as a final output interface of the transmitting end light source device.
The final output interface is an interface matched with an in-situ protection single-end prefabricated port, so that the problem that no such test line exists in the market is solved.
The laser sends a stable and reliable fixed power light source which is used as a test source of the tested on-site protection optical cable. In addition, the current regulation control circuit can be used for regulating functions, so that a fixed power light source can be generated, a laser can send a variable power light source, different application scenes can be simulated, and the verification process of the on-site protection optical cable is more comprehensive and scientific.
The optical switch is 1-16 paths, can be used for testing multiple optical fiber bundles, is specially designed for on-site protection of prefabricated optical cables, can complete on-site scattered 16 paths of optical cable testing by one test, and saves the times of manual plugging and unplugging switching. The testing time is saved, and the influence of the difference loss caused by the plugging is avoided; the splitter splits an output line of the optical switch, one path is used as test excitation to the tested prefabricated optical cable head, and the other path is used as a test port to provide an original value of a test light source.
As shown in fig. 2, fig. 2 is an internal structure diagram of the optical power meter at the receiving end of the present invention. The receiving end optical power meter device comprises an optical power meter and an intelligent handheld terminal.
The optical power meter is provided with an optical cable input interface, and can be compatible with the access of various optical fiber heads; the optical power meter performs AD conversion on an analog signal input by the optical cable to form a digital signal, and outputs the digital signal in a digital interface form; the interface is connected with an input interface of the intelligent handheld terminal, the intelligent handheld terminal acquires a digital signal value, and the digital signal value is finally displayed on a man-machine interaction interface of a liquid crystal screen of the intelligent handheld terminal through operation and comparison.
The receiving-end optical power meter device is not only an optical power meter, but also an intelligent handheld terminal tablet computer with powerful functions. The system has the advantages of good man-machine interaction interface, super-strong operation performance and stable wireless transmission function, and can rapidly, intuitively and accurately display test data.
The optical power meter is composed of a conversion connector and an optical collector, the conversion connector and the optical collector are combined together by adopting a screw knob, and different types of conversion interfaces, such as an LC port, an ST port and the like, can be replaced according to the requirements of different optical port types on site, so that the requirements of different optical port types of an on-site protection optical cable are met. The light source output port of the transmitting end is connected with the protecting single-end prefabrication port, and the dispersing port at the other end of the protecting optical cable is connected with the host computer of the receiving end, so that a closed loop test is formed.
The intelligent handheld terminal is a testing host, is compact and firm in structure and is suitable for being used in field environments. The optical port number of the light received by the test host is displayed on the liquid crystal screen of the host, and the test host measures and calculates the optical power attenuation.
The receiving end optical power meter devices have wireless transmission functions and can be used for simultaneously testing one receiving end optical power meter device to obtain the current power value of the light source, the other receiving end optical power meter device tests the power value of the light source after the light source passes through the prefabricated optical cable, the two receiving end optical power meter devices exchange data with each other through wireless transmission, the data before and after the prefabricated optical cable can be calculated and displayed, and the two receiving end optical power meter devices can synchronously obtain the test result.
In specific implementation, as shown in fig. 3, the invention is characterized in that a transmitting end light source prefabricated female head is connected with an on-site protection optical cable single-end prefabricated part to serve as an excitation source; the LC port to be tested can be connected with a host of the receiving end, and the host can measure the original value; the other end of the local protection optical cable is connected with a host computer of the receiver through a dispersion port, and the host computer obtains a test value.
In the case of the liquid crystal display, the original value and the test value are obtained by testing the same host computer, and the host computer displays a comparison graph of the original value and the test value in a human-computer interface of the liquid crystal display. The test results were clear at a glance.
In another case, if two ends of the tested on-site protection optical cable are far away, the original value and the test value are respectively obtained by two hosts through testing respectively, the two hosts transmit and exchange the respectively obtained test values with each other through a wireless transmission function, and finally the two hosts have the original value and the test value, and can be used for drawing and displaying a comparison graph of the original value and the test value in a human-computer interface of a liquid crystal screen.
In order to realize that the transmitting-end light source interface is suitable for a special on-site protection optical cable prefabrication interface, a 1-way 16-way optical switch is introduced, and then a prefabrication end female head interface is adopted, so that the on-site protection optical cable prefabrication interface which is completely matched is designed, and the light source adding operation is convenient and simple during testing. The transmitting end introduces a 1-2-division light splitter for supplying light to the tested optical cable and acquiring the original DB value of the current light source, and the split light source is one path to the tested optical cable and the other path to the host of the receiving end to acquire the current original DB value. The internal structure block diagram of the final transmitting end light source device is shown in fig. 1, firstly, a laser generates a stable light source, the stable light source is regulated by a current regulation control circuit to be converted into a plurality of groups of light sources with linear variable power, thus, comprehensive test original data are provided, the light source is provided for an optical switch, 1X16 paths of switching channels can be realized through the optical switch, 2 groups of identical 16 paths of channels are obtained through an optical splitter after 16 paths of channels pass through an optical splitter, one group of channels form a prefabricated female head for a prefabricated optical cable to be tested, and one group of channels form an LC port to be tested for a receiving end host to obtain the original value of the test light source.
In order to realize that the receiving end host is used for various optical cable interface types of the intelligent substation, the receiving end optical power meter device part is composed of an interface converter and an optical detector. The two are combined together by adopting screw knobs, and the converter interfaces, such as an LC port, an ST port, an FC port and the like, can be matched and replaced at will according to the requirements of the intelligent substation on different optical cable port types. In-situ protection optical cable testing may also occur when two ends of the tested optical cable are far away, where, for convenience of testing, the receiving end host design covers a wireless communication function, and is used for directly performing wireless transmission data by multiple receiving hosts. The two hosts interact the obtained values through wireless communication, and a comparison graph of the original value and the actual value is drawn and displayed on a human-computer interface on each liquid crystal screen. The internal structure block diagram of the final receiving end host is shown in fig. 2, firstly, an optical power meter detects an input light source, AD conversion is carried out, the value is transmitted to a CPU module, and the CPU module stores a final test actual DB value after data conversion and transportation; the wireless communication module obtains an original DB value measured by the host at the other end through the instruction and transmits the original DB value to the CPU module for storage. The CPU module retrieves the stored original value and the actual value and displays the original value and the actual value through the liquid crystal display human-computer interface.
The invention can test and check the on-site protection prefabricated optical cable of the intelligent substation, the optical cable is a special single-end prefabricated port and is a multi-beam cable, if the optical cable is tested by frequently plugging and unplugging the input end in the test process, the influence of difference loss is likely to be caused, and the transmitting end light source which is introduced into the optical switch design avoids plugging and unplugging operation in the data test process, so that the test data of the group is stable and accurate.
The invention also considers the specificity of the on-site installation, and various problems possibly occur on site, such as that if the distance between two ends of the tested optical cable is far, the original value and the actual value are obtained by back and forth comparison test, the probability of human misoperation, human omission error and the like is increased, the testing work is not facilitated, and the normal work of the on-site protection device is possibly influenced finally. Therefore, aiming at the special case, the receiving end testing host has the wireless transmission function, two different hosts can respectively test two remote optical cable distances, and the tested data information is interacted by wireless communication, so that the testing accuracy is ensured.
The invention has clear structure, simplicity and clarity, rapid development progress and low hardware cost; the laser, the optical switch and the splitter all have high-precision performance, and the invention has excellent testing performance.
In the implementation, the optical switch at the transmitting end is divided into 1-16 paths, one end is accessed by 1-path light source, the other end is output by the optional 16-path channel through the branching control of the optical switch, and the optical switch is suitable for the multi-core test requirement of the prefabricated port of the on-site optical cable.
The optional 16 paths of channels obtained through the optical switch are separated into a 16-core single-end prefabricated female head and 16 paths of LC ports to be tested through the splitter, and the two ports are used as final output interfaces of the light source of the transmitting end. The single-end prefabricated female head is used for testing the single-end prefabricated optical cable of the in-situ protection optical cable; and the LC port to be tested obtains the original DB value of the current transmitting end light source for testing. The receiving end host can obtain the original DB value of the current test through the port and store the original DB value.
In the technical scheme, the tested local protection optical cable dispersion end is connected to the host optical power detection port of the receiving end, the data acquired by the optical power meter is transmitted to the host CPU, and the final DB value is obtained through conversion and calculation. The receiving end host can test and store 16 paths of different DB values scattered by the local protection optical cable by switching the optical switch at the transmitting end. The host can adjust the stored 16 paths of original values and test values, the values are respectively displayed on a liquid crystal screen through drawing, and the performance condition of the 16 paths of optical cables is clear at a glance.
In the technical scheme, the optical switch is adopted to switch and test the 16-path DB value, so that the manual plug switching times are saved. The testing time is saved, and the influence of the difference loss caused by the plugging is avoided.
In the above technical solution, if the two ends of the in-situ protection optical cable are far away, in order to avoid running back and forth to obtain the original value and the test value during testing, two receiving end hosts may be adopted, one host tests at the transmitting end light source to obtain the original value, the other host tests at the in-situ protection optical cable test end to obtain the test value, and finally, the two hosts exchange the acquired DB values with each other through the wireless transmission function, and both can draw a comparison graph of the original value and the test value on their own liquid crystal screen, so as to display the optical cable test result. Through the wireless transmission function, the testing efficiency is improved, and human errors caused by round-trip testing are avoided.
In the technical scheme, the value tested each time is stored in the host, and the corresponding storage time and the drawing display time are recorded, so that the user is convenient to recall the previous test result.
Claims (7)
1. On-site protection prefabricated optical cable checking device, characterized by: the device comprises a transmitting end light source device and a receiving end light power meter device; the transmitting end light source device comprises a local source test port and a prefabricated optical cable test port, one group is used for in-situ prefabricated optical cable test, and the other group is used as the local source test port; the local source test port is connected with a first receiving end optical power meter device, and the first receiving end optical power meter device measures 16 paths of original signal values of the light source and stores the original signal values as reference comparison values; the optical cable test port is connected with the optical cable test port to be tested, the optical cable dispersion port to be tested is connected with the optical power meter device at the second receiving end, and the optical power meter device at the second receiving end is used for measuring the signal value of the light source after the optical cable transmission and storing the signal value as a test data value; the first receiving end optical power meter device and the second receiving end optical power meter device are in communication connection through a wireless autonomous network, and the first receiving end optical power meter device and the second receiving end optical power meter device are mutually and respectively stored with test values, so that the first receiving end optical power meter device and the second receiving end optical power meter device are respectively provided with a light source original value and an optical cable signal value, and respectively draw and display a comparison graph of the original value and the test value in a man-machine interface of a liquid crystal screen; the transmitting end light source device comprises a laser, a current regulation control circuit, an optical switch and a branching device; the laser generates stable light sources, a control input port of the laser is connected with a current regulation control circuit, and the laser generates a plurality of groups of light sources with linear variable power through the regulation of the current regulation control circuit to generate comprehensive test source data; the output port of the laser is connected with the optical switch, and 1X16 paths of switching channel output is realized through the optical switch; the 16-path output interface is connected with a 1X2 optical splitter, two groups of identical 16-path channels are obtained through the optical splitter, and a group of the 16-path channels form a local test port and are used for a receiving end optical power meter to obtain an original value of a test light source; the other group forms a prefabricated female interface for connecting and testing with the prefabricated optical cable to be tested, the prefabricated female interface is used as a final output interface of the transmitting end light source device, and the final output interface is an interface matched with the in-situ protection single-end prefabricated interface; the prefabricated female head is connected with the single-end prefabricated part of the on-site protection optical cable and is used as an excitation source; the LC port to be tested is connected with a host computer of the receiving end, and the host computer measures an original value; the other end of the local protection optical cable is connected with a receiver host through a dispersion port, and the host acquires a test value; the original value and the test value are obtained by testing the same host computer, and the host computer draws and displays a comparison chart of the original value and the test value in a human-computer interface of a liquid crystal screen; the laser sends a fixed power light source to serve as a test source of the tested on-site protection optical cable; in addition, the current regulation control circuit regulates the function, so that a fixed power light source is generated, a laser sends a variable power light source, and different application scenes are simulated; the optical switch is 1-16 paths, is used for testing multiple optical fiber bundles, and can finish the on-site scattered 16 paths of optical cable test in one test; the splitter splits an output line of the optical switch, one path is used as test excitation to a tested prefabricated optical cable head, and the other path is used as a test port to provide an original value of a test light source; the receiving end optical power meter device comprises an optical power meter and an intelligent handheld terminal; the optical power meter is provided with an optical cable input interface, and is compatible with the access of various optical fiber heads; the optical power meter performs AD conversion on an analog signal input by the optical cable to form a digital signal, and outputs the digital signal in a digital interface form; the interface is connected with an input interface of the intelligent handheld terminal, the intelligent handheld terminal acquires a digital signal value, and the digital signal value is finally displayed on a man-machine interaction interface of a liquid crystal screen of the intelligent handheld terminal through calculation and comparison; the optical power meter consists of a conversion connector and an optical collector, which are combined together by adopting a screw knob; the light source output port of the transmitting end is connected with the protecting single-end prefabrication port, and the dispersing port at the other end of the protecting optical cable is connected with the host computer of the receiving end, so that a closed loop test is formed; the intelligent handheld terminal is a testing host, the optical port number of the light received by the testing host is displayed on a host liquid crystal screen, and the testing host measures and calculates the optical power attenuation; the receiving end optical power meter devices have wireless transmission functions and can be used for simultaneously testing one receiving end optical power meter device to obtain the current power value of the light source, the other receiving end optical power meter device tests the power value of the light source after the light source passes through the prefabricated optical cable, the two receiving end optical power meter devices exchange data with each other through wireless transmission, the data before and after the prefabricated optical cable can be calculated and displayed, and the two receiving end optical power meter devices can synchronously obtain the test result.
2. The in situ protection pre-fabricated fiber optic cable verification device of claim 1, wherein: and if the two ends of the tested optical cable are far away, the original value and the test value are respectively obtained by testing the two hosts, the two hosts transmit and exchange the respectively obtained test values with each other through a wireless transmission function, and finally the two hosts both have the original value and the test value and can be used for drawing and displaying a comparison graph of the original value and the test value in a human-computer interface of a liquid crystal screen.
3. The in situ protection pre-fabricated fiber optic cable verification device of claim 1, wherein: the interface of the transmitting end light source device is introduced with a 1-16-path optical switch, a prefabricated end female head interface is adopted, and the prefabricated interface of the on-site protection optical cable is matched; the transmitting end supplies light sources for the tested optical cable, can acquire the original DB value of the current light source, introduces a 1-to-2-split light splitter, and the split light sources are sent to the tested optical cable in one path and sent to the receiving end host in the other path to acquire the current original DB value; internal structure of transmitting end light source device: the laser generates stable light source, the stable light source is regulated by the current regulating control circuit to be converted into a plurality of groups of light sources with linear variable power, thus providing comprehensive test original data, then providing the light source to the optical switch, realizing 1X16 paths of switching channels by the optical switch, obtaining 2 groups of identical 16 paths of channels by the optical splitter, forming a group of prefabricated female heads for the tested prefabricated optical cables, and forming a group of LC ports to be tested for the receiving end host to obtain the original value of the test light source.
4. The in situ protection pre-fabricated fiber optic cable verification device of claim 1, wherein: the receiving-end optical power meter device is characterized in that a receiving-end host is used for various optical cable interface types of an intelligent substation, the receiving-end optical power meter device is composed of an interface converter and an optical detector, and the interface converter and the optical detector are combined together by a screw knob.
5. The in situ protection pre-fabricated fiber optic cable verification device of claim 1, wherein: the receiving end host of the receiving end optical power meter device covers a wireless communication function and is used for directly carrying out wireless data transmission by a plurality of receiving hosts; one host can obtain a test original value at the input light source end of the tested optical cable, the other host obtains a test actual value at the output end of the tested optical cable, and the two hosts interact the obtained values respectively through wireless communication, and draw and display a comparison graph of the original value and the actual value on a human-computer interface on each liquid crystal screen; firstly, an optical power meter detects an input light source, AD conversion is carried out, the value is transmitted to a CPU module, and the CPU module stores a final test actual DB value after data conversion and transportation; the wireless communication module obtains an original DB value measured by the host at the other end through an instruction and transmits the original DB value to the CPU module for storage; the CPU module retrieves the stored original value and the actual value and displays the original value and the actual value through the liquid crystal display human-computer interface.
6. The in situ protection pre-fabricated fiber optic cable verification device of claim 1, wherein: the optical switch at the transmitting end of the transmitting end light source device is divided into 1-way and 16-way, one end of the optical switch is connected with 1-way light source, and the other end of the optical switch is output by a selectable 16-way channel through branching control of the optical switch, so that the optical switch meets the multi-core testing requirement of an on-site optical cable prefabricated port; the optional 16 paths of channels obtained through the optical switch are separated into a 16-core single-end prefabricated female head and 16 paths of LC ports to be tested through a splitter, and the two ports are used as final output interfaces of a transmitting-end light source; the single-end prefabricated female head is used for testing the single-end prefabricated optical cable of the in-situ protection optical cable; the LC port to be tested obtains the original DB value of the current transmitting end light source for testing; the receiving end host obtains the original DB value of the current test through the LC port to be tested and stores the original DB value; the tested local protection optical cable dispersion end is connected to the host optical power detection port of the receiving end, the data acquired by the optical power meter is transmitted to the host CPU, and the final DB value is obtained through conversion and calculation; the method comprises the steps that an optical switch is switched at a transmitting end, a receiving end host is used for testing 16 paths of different DB values scattered by an on-site protection optical cable and storing the values; the host computer calls out the stored 16 paths of original values and test values, and the values are respectively displayed on the liquid crystal display through drawing.
7. The in situ protection pre-fabricated fiber optic cable verification device of claim 6, wherein: when the two ends of the local protection optical cable are far away, two receiving end hosts are adopted, one host is tested and obtains an original value at a transmitting end light source, the other host is tested and obtains a test value at a local protection optical cable testing end, finally the two hosts exchange DB values obtained by themselves through a wireless transmission function, and both can draw a comparison graph of the original value and the test value on a liquid crystal screen of the two hosts, so that an optical cable testing result is displayed.
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