CN113945866B - Testing device and testing method for multiple types of transmission lines - Google Patents
Testing device and testing method for multiple types of transmission lines Download PDFInfo
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- CN113945866B CN113945866B CN202111522684.8A CN202111522684A CN113945866B CN 113945866 B CN113945866 B CN 113945866B CN 202111522684 A CN202111522684 A CN 202111522684A CN 113945866 B CN113945866 B CN 113945866B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
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Abstract
The test device comprises an active test device and a passive test device, wherein the test device comprises an optical fiber test circuit for testing corresponding optical fibers to be tested according to the receiving and transmitting optical states of an optical module, a radio frequency test circuit for testing corresponding radio frequency wires to be tested according to the output voltage of a first comparator, and a network cable test circuit for testing corresponding network cables to be tested according to the output voltage of a second comparator. Through the technical scheme of this application, adopt the testing arrangement that integrates to carry out the test of break-make, line preface and cable quality to the distribution of many optic fibre, net twine, radio frequency line simultaneously, when improving multiple type of cable efficiency of software testing, effectively solved the problem that current cable efficiency of software testing is low, have stronger popularization and application meaning in transmission cable construction field.
Description
Technical Field
The application relates to the field of communication cable testing, in particular to a testing device and a testing method for multiple transmission lines.
Background
Communication cables are used as important carriers for guaranteeing normal transmission of railway communication, railway communication physical channels are distributed along a railway, in a tunnel and in rooms for railways at present, each communication room needs to complete testing of cables such as optical fibers, network cables and radio frequency cables, and accuracy and efficiency of testing of various communication transmission cables are particularly important for guaranteeing normal transmission of railway communication.
At present, in a traditional railway communication construction mode, equipment wiring, cable testing and troubleshooting work of long-distance lines are distributed to different construction groups, and meanwhile, corresponding measuring instruments are matched to complete testing work of various types of transmission cables, so that the problems of low testing efficiency, high personnel and time cost and the like exist.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the application provides a testing device and a testing method for multiple types of transmission lines, so that the testing efficiency of multiple types of cables is improved, the problem of low testing efficiency of the existing cables is effectively solved, and the testing device and the testing method have strong popularization and application significance in the field of transmission cable construction.
In a first aspect, the present application provides a testing apparatus for multiple types of transmission lines, comprising:
the system comprises two test devices, a transmission line to be tested is respectively spliced with the two test devices, the two test devices comprise an active test device and a passive test device, and the transmission line to be tested comprises an optical fiber to be tested, a radio frequency line to be tested and a network cable to be tested;
the test apparatus includes:
the optical fiber test circuit comprises a plurality of optical modules, the optical modules are arranged in one-to-one correspondence with the optical fibers to be tested, and the optical fiber test circuit is used for testing the corresponding optical fibers to be tested according to the light receiving and transmitting states of the optical modules;
the radio frequency test circuit comprises a plurality of first comparators, the first comparators are arranged in one-to-one correspondence with the communication channels of the radio frequency lines to be tested, and the radio frequency test circuit is used for testing the corresponding radio frequency lines to be tested according to the output voltage of the first comparators;
the network test circuit comprises a plurality of second comparators, the cable pair of the network cable to be tested is arranged corresponding to at least one of the second comparators, and the network test circuit is used for testing the corresponding network cable to be tested according to the output voltage of the second comparators.
Optionally, the optical fiber testing circuit further comprises:
the optical module enabling circuits are electrically connected with the optical modules in a one-to-one correspondence mode, each optical module enabling circuit comprises a power supply and a switch component, and the switch component is used for controlling the on-off between the power supply and a power supply end of the corresponding optical module.
Optionally, the radio frequency test circuit further includes:
the clamping resistor circuits are arranged in one-to-one correspondence with the first comparators and comprise first impedance elements and second impedance elements, the first impedance elements are electrically connected with the forward ends of the corresponding first comparators, and the second impedance elements are electrically connected with the reverse ends of the corresponding first comparators;
the first comparator is used for adjusting the output voltage of the first comparator according to the external applied voltage of the first comparator and the external applied voltage of the clamping resistance circuit, and the radio frequency test circuit is used for testing the corresponding radio frequency line to be tested according to the jump state of the output voltage of the first comparator.
Optionally, the network cable test circuit further includes:
the initial setting circuit is electrically connected with all the second comparators and is used for setting initial input voltages of the second comparators;
the relay groups are arranged corresponding to the at least one second comparator, and the relay groups are arranged corresponding to the cables in a one-to-one manner;
the network cable test circuit is used for controlling the on-off state of the relay group to adjust the external applied voltage of the second comparator, the second comparator is used for adjusting the output voltage of the second comparator according to the external applied voltage of the second comparator, the initial input voltage and the voltage on the corresponding cable pair, and the network cable test circuit is used for testing the corresponding network cable to be tested according to the jump state of the output voltage of the second comparator.
Optionally, the initial setting circuit includes:
the plurality of third impedance elements are connected in series between an external power supply and a ground terminal, and at least one third impedance element is connected in series between a forward terminal and a reverse terminal of the second comparator.
Optionally, the testing apparatus for multiple kinds of transmission lines further comprises:
the state indicating component is used for indicating the test results of the optical fiber test circuit, the radio frequency test circuit and the network cable test circuit.
In a second aspect, embodiments of the present application further provide a testing method for multiple transmission lines, which is performed by the testing apparatus for multiple transmission lines according to the first aspect, and the testing method for multiple transmission lines includes:
testing the corresponding optical fiber to be tested according to the receiving and transmitting light state of the optical module;
testing the corresponding radio frequency line to be tested according to the output voltage of the first comparator;
and testing the corresponding network cable to be tested according to the output voltage of the second comparator.
Optionally, the testing the corresponding optical fiber to be tested according to the transceiving optical state of the optical module includes:
testing the optical fibers to be tested in sequence;
the testing of one optical fiber to be tested comprises:
controlling the first light module to emit light;
testing a first set parameter of the corresponding optical fiber to be tested according to whether a second optical module receives light in response to the first optical module;
the first optical module is the corresponding optical module in the active test equipment, and the second optical module is the corresponding optical module in the passive test equipment.
Optionally, testing the corresponding radio frequency line to be tested according to the output voltage of the first comparator includes:
sequentially testing the communication channels of the radio frequency line to be tested until one communication channel is tested to establish communication connection;
testing one of the communication channels comprises:
controlling the initial output voltage of the corresponding first comparator to be a first voltage;
controlling an externally applied voltage of the corresponding first comparator in the active test device and the passive test device to control an output voltage of the corresponding first comparator to jump to a second voltage;
testing a second set parameter of the corresponding radio frequency line to be tested according to whether the output voltage of the corresponding first comparator in the active test equipment and the passive test equipment jumps or not;
wherein the first voltage and the second voltage have different levels.
Optionally, testing the corresponding network cable to be tested according to the output voltage of the second comparator includes:
sequentially testing cable pairs of the network cable to be tested; wherein the cables in the cable pair are electrically connected with the comparison input end of the corresponding second comparator;
testing a set of the cable pairs comprises:
controlling the initial output voltage of the corresponding second comparator to be a third voltage;
during a first period, controlling an externally applied voltage on the cable pair to control the output voltage of the corresponding second comparator to jump to a fourth voltage;
controlling an externally applied voltage of the corresponding second comparator in the active test device and the passive test device to control the output voltage of the corresponding second comparator to jump to the third voltage in a second period;
testing a third set parameter of the corresponding network cable to be tested according to the jump timing sequence of the output voltage of the corresponding second comparator in the active test equipment and the passive test equipment; wherein the third voltage and the fourth voltage have different levels.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
the testing device for setting the multiple types of transmission lines comprises two testing devices, the transmission lines to be tested are respectively spliced with the two testing devices, the two testing devices comprise active testing devices and passive testing devices, and the transmission lines to be tested comprise optical fibers to be tested, radio frequency lines to be tested and network cables to be tested; the optical fiber test circuit in the test equipment comprises a plurality of optical modules, the optical modules are arranged in one-to-one correspondence with the optical fibers to be tested, and the optical fiber test circuit is used for testing the corresponding optical fibers to be tested according to the receiving and transmitting optical states of the optical modules; the radio frequency test circuit comprises a plurality of first comparators, the first comparators are arranged in one-to-one correspondence with the communication channels of the radio frequency lines to be tested, and the radio frequency test circuit is used for testing the corresponding radio frequency lines to be tested according to the output voltage of the first comparators; the network test circuit comprises a plurality of second comparators, the cable pairs of the network cables to be tested are arranged corresponding to at least one second comparator, and the network cable test circuit is used for testing the corresponding network cables to be tested according to the output voltages of the second comparators. So set up, adopt the testing arrangement who integrates to carry out the test of break-make, line preface and cable quality to the distribution of many optic fibre, net twine, radio frequency line simultaneously, can effectively improve multiple type of cable efficiency of software testing, solved the problem that current cable efficiency of software testing is low. In addition, the testing device has high integration degree and strong practicability, and has stronger popularization and application significance in the construction field of transmission cables.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
FIG. 1 is a schematic structural diagram of a testing apparatus for various transmission lines according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a testing apparatus according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of an optical fiber testing circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a radio frequency test circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a network cable test circuit according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a cable connection provided in an embodiment of the present application;
fig. 7 is a schematic diagram illustrating an initial setup circuit state during a start-up test according to an embodiment of the present disclosure;
fig. 8 is a schematic flowchart of a method for testing various transmission lines according to an embodiment of the present application.
Detailed Description
In order that the above-mentioned objects, features and advantages of the present application may be more clearly understood, the solution of the present application will be further described below. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein; it should be apparent that the embodiments described in this specification are only some of the embodiments of the present application, and not all of the embodiments.
Fig. 1 is a schematic structural diagram of a testing apparatus for various transmission lines according to an embodiment of the present disclosure. As shown in fig. 1, the testing apparatus for multiple transmission lines includes two testing devices, the two testing devices include an active testing device 1 and a passive testing device 2, and the transmission lines to be tested are respectively plugged into the two testing devices, wherein the transmission lines to be tested include an optical fiber 3 to be tested, a radio frequency line 4 to be tested, and a network cable 5 to be tested. It should be noted that fig. 1 only exemplarily sets that the optical fiber 3 to be tested, the radio frequency line 4 to be tested, and the network line 5 to be tested are respectively represented by one transmission line, and does not limit the number of the optical fiber 3 to be tested, the radio frequency line 4 to be tested, and the network line 5 to be tested. For example, the radio frequency line 4 to be tested may be a 2M line, an SYV-type radio frequency coaxial cable is generally called a 2M line in the communication industry, and an SYV is a solid polyethylene insulated polyvinyl chloride sheathed coaxial cable.
Specifically, as shown in fig. 1, two test devices are required to be placed at two ends for testing various transmission lines, after the two test devices are connected, the test device at one end is started to start a test process, and the test device at the start end is mainly used for testing, which is the active test device 1, and the other test device is the passive test device 2. After the test process is finished, the external equipment can be used for connecting the two test devices through the serial port, and the external equipment is used for obtaining test data. The test result of each time can be stored, and the test result can be obtained by reading the history.
The structure of the active test device 1 and the passive test device 2 is the same, the test of various transmission lines can be started from any direction, two control buttons are arranged on the two test devices, one is a start test button, and the other is a stop test button. When the start test button of one of the test devices is pressed, the test device enters a test state and becomes an active test device 1, and at this time, the other test device becomes a passive test device 2 after receiving the test signal.
Specifically, when the testing device enters a testing state, the three communication transmission lines can be tested simultaneously, the active testing device 1 sequentially starts each device port and sends out a testing signal, the corresponding port of the passive testing device 2 detects the testing signal, and the signal is returned according to a specific mode to test, so that the cable test of various transmission lines is completed. After the test process is completed, the active test device 1 and the passive test device 2 both store test results, and can read test records and form a report by using external devices through an RS232 interface (asynchronous transmission standard interface).
Fig. 2 is a schematic structural diagram of a testing apparatus according to an embodiment of the present application. With reference to fig. 1 and 2, the testing device 100 includes an optical fiber testing circuit 6, a radio frequency testing circuit 7, and a network cable testing circuit 8, that is, the active testing device 1 and the passive testing device 2 each include an optical fiber testing circuit 6, a radio frequency testing circuit 7, and a network cable testing circuit 8.
The optical fiber test circuit 6 comprises a plurality of optical modules 9, the optical modules 9 are arranged in one-to-one correspondence with the optical fibers 3 to be tested, and the optical fiber test circuit 6 is used for testing the corresponding optical fibers 3 to be tested according to the light receiving and transmitting states of the optical modules 9. Specifically, with reference to fig. 1 and fig. 2, the active test device 1 and the passive test device 2 are both provided with an optical module 9, and the optical module 9 in the active test device 1 can be set to emit light, and the optical module 9 in the passive test device 2 receives light. Whether the light module 9 in the passive test device 2 can receive light can be set to be associated with the on-off state of the corresponding optical fiber 3 to be tested, so that the optical fiber 3 to be tested can be tested according to the light receiving and transmitting state of the optical module 9 by using the optical fiber test circuit 6.
The radio frequency test circuit 7 comprises a plurality of first comparators 10, the first comparators 10 are arranged in one-to-one correspondence with the communication channels of the radio frequency lines 4 to be tested, and the radio frequency test circuit 7 is used for testing the corresponding radio frequency lines 4 to be tested according to the output voltage of the first comparators 10. Specifically, the level of the output voltage of the first comparator 10 may be set to be associated with whether the communication channel corresponding to the radio frequency line 4 to be tested can establish communication connection, so that the radio frequency test circuit 7 may be used to test the corresponding radio frequency line 4 to be tested according to the level of the output voltage of the first comparator 10, for example, to test whether the communication channel in the corresponding radio frequency line 4 to be tested can establish communication connection between the active test device 1 and the passive test device 2.
The network cable test circuit 8 comprises a plurality of second comparators 11, the cable pair of the network cable 5 to be tested is arranged corresponding to at least one second comparator 11, and the network cable test circuit 8 is used for testing the corresponding network cable 5 to be tested according to the output voltage of the second comparators 11. Specifically, the network cable 5 to be tested may include a plurality of cables, and each two cables form a group of cable pairs of the network cable 5 to be tested. The level of the output voltage of the second comparator 11 may be set to be associated with the on/off of the cable pair corresponding to the network cable 5 to be tested, so that the network cable test circuit 8 may be used to test the corresponding network cable 5 to be tested according to the level of the output voltage of the second comparator 11.
From this, this application embodiment is integrated optic fibre test circuit 6, radio frequency test circuit 7 and net twine test circuit 8 in same testing arrangement, adopts the testing arrangement that integrates to carry out the test of break-make, line sequence and cable quality to the distribution of many optic fibres, net twine, radio frequency line simultaneously, can effectively improve multiple type of cable efficiency of software testing, has solved the problem that current cable efficiency of software testing is low. In addition, the testing device has high integration degree and strong practicability, and has stronger popularization and application significance in the construction field of transmission cables.
Fig. 3 is a schematic structural diagram of an optical fiber testing circuit according to an embodiment of the present disclosure. With reference to fig. 1 to 3, the optical fiber test circuit 6 further includes a plurality of optical module enabling circuits 12, the optical module enabling circuits 12 are electrically connected to the optical modules 9 in a one-to-one correspondence manner, each optical module enabling circuit 12 includes a power supply BAT and a switch component K, and the switch component K is configured to control on/off between the power supply BAT and a power supply terminal of the corresponding optical module 9. It should be noted that fig. 3 only exemplarily shows a test structure corresponding to one optical fiber 3 to be tested, and test structures corresponding to the other optical fibers 3 to be tested are similar.
Specifically, the optical module 9 may be, for example, a hundred mega fiber channel optical module with a single optical port 1 × 9, and when the test is not performed, the optical module 9 does not emit light. After the start test, the switch component K in the active test device 1 is controlled to be closed, the power supply BAT in the active test device 1 supplies power to the optical module 9 to enable the optical module 9, the optical module 9 in the active test device 1 emits light, and the passive test device 2 does not start the test. If the corresponding optical fiber 3 to be tested is good in performance, the optical module 9 in the passive test equipment 2 will detect light receiving, and after the signal is confirmed, the passive test equipment 2 enters a response test state. After the active test equipment 1 and the passive test equipment 2 perform interactive confirmation, the test corresponding to the port of the first optical fiber 3 to be tested is completed, and the optical modules 9 corresponding to the first optical fiber 3 to be tested in the active test equipment 1 and the passive test equipment 2 are both turned off to emit light, so that the test of the first optical fiber 3 to be tested is completed.
After the test on the first optical fiber 3 to be tested is completed, the optical module 9 corresponding to the second optical fiber 3 to be tested can be started to emit light, so that the test on the second optical fiber 3 to be tested is completed, and thus the tests on a plurality of optical fibers 3 to be tested are completed in sequence, the number of the optical fibers 3 to be tested can be twelve, for example, and the specific number of the optical fibers 3 to be tested is not limited in the embodiment of the application. In addition, after the test is started, if the opposite end, namely the passive test equipment 2 does not return a signal, after repeating for three times, the optical fiber 3 to be tested is considered to be not through, and a fault exists.
Fig. 4 is a schematic structural diagram of an rf test circuit according to an embodiment of the present disclosure. With reference to fig. 1, 2 and 4, the radio frequency test circuit 7 further includes a plurality of clamp resistor circuits 13, the clamp resistor circuits 13 are disposed in one-to-one correspondence with the first comparators 10, each clamp resistor circuit 13 includes a first impedance element R1 and a second impedance element R2, the first impedance element R1 is electrically connected to a forward end of the corresponding first comparator 10, and the second impedance element R2 is electrically connected to a reverse end of the corresponding first comparator 10.
The first comparator 10 is configured to adjust an output voltage thereof according to an externally applied voltage of the first comparator 10 and an externally applied voltage of the clamp resistor circuit 13, and the radio frequency test circuit 7 is configured to test the corresponding radio frequency line 4 to be tested according to a transition state of the output voltage of the first comparator 10.
For example, the radio frequency line 4 to be measured may be, for example, a DDF (Digital Distribution Frame) radio frequency line, which is also called a high frequency Distribution Frame, and there are 8 systems, 10 systems, 6 systems, 20 systems and the like in terms of a system, where one system corresponds to one communication channel described in the embodiments of the present application. Each group of DDF interfaces adopts two L9 coaxial heads, the two coaxial heads are respectively positioned in the active test device 1 and the passive test device 2, a first comparator 10 is electrically connected inside each coaxial head, and one first comparator 10 is connected into one clamping resistance circuit 13.
Specifically, when the test equipment port performs the radio frequency cable test, the initial output voltage of the first comparator 10 in the active test equipment 1 is set to be a low level by controlling the externally applied voltage of the clamping resistor circuit 13, that is, the initial output value of the first comparator 10 is controlled to be 0. When the active test device 1 starts a test, the passive test device 2 detects an initial output value of the corresponding first comparator 10 in the active test device 1 through transmission of the corresponding radio frequency line 4 to be tested.
By adjusting the externally applied voltage V1 additionally applied to the first comparator 10 in the active test device 1, for example, by setting the externally applied voltage V1 additionally applied to the first comparator 10 in the active test device 1 to be opposite to the initial externally applied voltage V2 of the clamping resistor circuit 13, both of which act on the comparison input terminal of the corresponding first comparator 10, the output voltage of the first comparator 10 in the active test device 1 jumps to a high level, i.e., the output value is 1, and at the same time, the passive test device 2 detects the level change of the output voltage of the first comparator 10 and responds to the test. Similarly, the circuit structures in the active test device 1 and the passive test device 2 are the same, and the active test device 1 and the passive test device 2 can both respond to the level jump of the output voltage of the first comparator 10 in the passive test device 2 by adjusting the voltage at the comparison input end of the first comparator 10 in the passive test device 2.
If the active test device 1 and the passive test device 2 can detect the level change of the output voltage of the first comparator 10, it is indicated that the performance of the radio frequency line 4 to be tested corresponding to the first comparator 10 is good, at this time, the active test device 1 can start communication, and the active test device 1 and the passive test device 2 acquire information of an opposite terminal to complete a line sequence connection test of two ports. When the level change cannot be detected at any step in the foregoing process, the active test device 1 and the passive test device 2 cannot establish a communication connection, and the group fails to be tested, and is switched to the next group for testing. Once a communication channel passes the test, a communication channel can be established, and the communication channel can complete information intercommunication between the active test device 1 and the passive test device 2 in the following test process, thereby completing all radio frequency tests.
In addition, if after the tests of all the radio frequency lines 4 to be tested are completed, communication channels are not established yet, and all the tests cannot be completed, at this time, different groups of communication channels can be tried to be established, that is, the communication channels are no longer communication channels between the first comparator 10 with the same serial number on the left side and the first comparator 10 with the same serial number on the right side, and the serial numbers of the first comparators 10 on the left and right sides for the same communication channel pair can be different. Therefore, even if only one DDF cable is connected, the detection of all ports can be finished, and a detection report can be formed.
Fig. 5 is a schematic structural diagram of a network cable test circuit according to an embodiment of the present disclosure. With reference to fig. 1, fig. 2 and fig. 5, the network cable test circuit 8 further includes an initial setting circuit 14 and a plurality of relay sets 15, the initial setting circuit 14 is electrically connected to all the second comparators 11 in the corresponding test equipment, and the initial setting circuit 14 is configured to set initial input voltages of the second comparators 11; the relay group 15 is configured corresponding to at least one second comparator 11, the relay group 15 is set corresponding to the cable pairs 16 of the network cable 5 to be tested one by one, that is, one relay group 15 is set corresponding to one cable pair 16.
The network cable test circuit 8 is configured to control a switching state of the relay group 15 to adjust an externally applied voltage of the second comparator 11, where the externally applied voltage of the second comparator 11 is a voltage between the power terminal VCC and the ground terminal GND, the second comparator 11 is configured to adjust an output voltage of the second comparator 11 according to the externally applied voltage, an initial input voltage, and a voltage on the corresponding cable pair 16, and the network cable test circuit 8 is configured to test the corresponding network cable 5 to be tested according to a jump state of the output voltage of the second comparator 11.
In particular, the initial input voltage of the second comparator 11 is set by the initial setting circuit 14 for providing the initial value of the voltage input terminal for the active test device 1. The external applied voltage of the second comparator 11 is adjusted by controlling the on-off state of the relay set 15, and the external applied voltage of the second comparator 11, the initial setting circuit 14, and the voltage on the corresponding network cable pair 16 are combined to adjust the output voltage of the second comparator 11 itself.
For example, the network line 5 to be tested may be an EDF, that is, a network wiring line, and the embodiment of the present application does not limit the specific type of the network line 5 to be tested. The network cable 5 to be tested shown in fig. 5 is an ethernet connection cable of an eight-core cable, the code of the transmission data is a manchester differential data code, the eight cables are divided into four cable pairs 16, two cables in each cable pair 16 are equal, that is, the two cables can be used in reverse order.
In order to test the sequence of the cables in the network cable 5 to be tested, at least one second comparator 11 is required to be arranged in the active test device 1 and the passive test device 2 corresponding to each cable pair 16 to monitor the change of the positive and negative levels on the corresponding cable pair 16. As shown in fig. 5, taking an RJ45 interface as an example, seven second comparators 11 need to be respectively configured in the active test device 1 and the passive test device 2 for one RJ45 interface, the odd numbered second comparators 11 in one column of the second comparators 11 in fig. 5 are arranged in one-to-one correspondence with the relay groups 15 and the cable pairs 16, and the even numbered second comparators 11 are arranged in correspondence with the two adjacent relay groups 15 and the two cable pairs 16. In order to ensure that the polarity of one cable pair 16 can be normally measured regardless of whether the cable pair 16 is reversely or positively connected after each cable pair 16 is connected to the level, two voltages, positive and negative, can be applied to each cable pair to ensure that the level of the output voltage of the second comparator 11 is changed.
The ethernet line sequence detection is also performed from the side of the active test device 1, the test is performed from the first port, there are four cable pairs 16 in total, the power-up test is performed from the first cable pair 16, each power-up is 50ms, in order to ensure that the passive test device 2 can complete the test, and then the power-up is performed at the reverse level, which lasts for 50ms as well. After the first set of cable pairs 16 is tested, the second set of cable pairs 16 is powered up for testing, and then the subsequent two sets of cable pairs 16 are powered up for measurement. The power-up test of all four pairs of cables is completed, taking a total of 400 ms. It should be noted that the power-on duration may also be adjusted, and this is not particularly limited in the embodiment of the present application.
Alternatively, as shown in fig. 5, the initial setting circuit 14 includes a plurality of third impedance elements R3, wherein the plurality of third impedance elements R3 are connected in series between the external power source VCC1 and the ground GND, at least one third impedance element R3 is connected in series between the forward terminal and the reverse terminal of the second comparator 11, and fig. 5 exemplarily sets one third impedance element R3 to be connected in series between the forward terminal and the reverse terminal of the second comparator 11. Specifically, by providing a plurality of third impedance elements R3 connected in series between the external power source VCC1 and the ground GND, the voltage division characteristics of the impedance elements are utilized to adjust the initial output voltage value of the second comparator 11.
The power-up detection process for the network cable 5 to be tested is as follows:
when the testing device is powered on, the ethernet cable is not loaded, at this time, the comparison input ends of the second comparators 11 of each port are connected in series, the third impedance element R3 respectively constitutes a pull-up resistor and a pull-down resistor of different second comparators 11, and the initial output voltages of all the second comparators 11 are set to be high levels, that is, the initial output is 1.
When two test devices are connected by a cable, if the cable is a direct connection cable, the level will not change, i.e. the output of the second comparator 11 will not change. Fig. 6 is a schematic diagram of a cable connection according to an embodiment of the present application. As shown in fig. 6, if the solid-line cables are connected in order, the resistances on both sides are balanced, and the input/output state of the second comparator 11 is not affected. When there is the cable connection similar to the dotted line, because the level of the connection point is no longer matched, an unbalanced state occurs, and the input of part of the second comparator 11 is affected and changed, especially a cable with a large span, for example, the cable a in fig. 5 has a greater influence on the input of the second comparator 11, and the embodiment of the present application adopts the form of the solid line direct connection cable in fig. 5.
Fig. 7 is a schematic diagram of an initial setup circuit state during a start-up test according to an embodiment of the present disclosure. As shown in fig. 7, when the active test device 1 starts a test, the passive test device 2 disconnects the second comparator 11 in the test port, the power supply on the side of the passive test device 2 no longer supplies power to the input of the second comparator 11 in the passive test device 2, and the connection of the active test device 1 supplies power to the input of the second comparator 11 in the passive test device 2. In this case, the output of the second comparator 11 on the active test device 1 side is the same as that at the time of power-on under normal conditions.
As shown in fig. 5, a +5V level is added to the first cable pair 16, and if the first cable pair 16 is normally connected, the first cable pair 16 is connected to the comparison input terminals of the second comparators 11 on both sides by controlling the switching state of the relay set 15 as shown in fig. 5, and the level is loaded to the corresponding second comparator 11. Since the later loaded level drives stronger than the original level of the test equipment, the second comparator 11 will reflect the newly loaded level direction. The newly loaded level direction is opposite to the original level direction, so that the output voltage of the second comparator 11 jumps to a low level, i.e., to 0.
Considering that the line sequence is opposite and may cause a level change and cannot reflect a real line sequence situation, the switching state of the relay set 15 is switched, the external applied voltage VCC of the second comparator 11 is selected to be connected to the comparison input terminal of the second comparator 11, and the level of the external applied voltage VCC of the second comparator 11 and the initial input voltage of the second comparator 11 in the same direction is adjusted, so that the output voltage of the second comparator 11 jumps back to the high level, that is, jumps back to 1.
Therefore, after the passive test device 2 can detect the change process of the output voltage of the second comparator 11 in the active test device 1 from 1 to 0 and from 0 to 1, and after the passive test device 2 detects the level change, the level change process in the same manner is loaded on the port to which the passive test device 2 responds in the test process of the radio frequency to be tested like the test process of the radio frequency to be tested described in the above embodiment, and the passive test device 2 cooperates with the active test device 1 to complete the line sequence test of the port.
Optionally, the testing device for various transmission lines may further include a status indicating component for indicating the test results of the optical fiber testing circuit 6, the radio frequency testing circuit 7 and the network cable testing circuit 8. Illustratively, the status indication component may be, for example, a display indication component or a sound indication component, which is not limited in this application.
For example, taking the display indication component as an example, the display indication component may be divided into four parts, the first part performs power indication and system operation indication, and may be composed of three light emitting diodes, and the power indication diode may be set to emit red light, which indicates that there is a line sequence error indication in the line sequence test operation. The second part can include ethernet port pilot lamp, and the third part can include the fiber optic mouth pilot lamp, and the fourth part can include 2M mouth pilot lamp, and every port can set up two pilot lamps, to respectively corresponding sequencing instruction and line sequence fault indication, can utilize green light table to check this port for sequencing operation, and line sequence fault lamp is bright when there is the line sequence fault.
Illustratively, the status indicating member is, for example, a status indicating member with red and green indicator lights, wherein a set of red and green indicator lights is provided for each transmission cable. Specifically, when an optical fiber test, a radio frequency test and a network cable test are carried out, the corresponding green indicator lamps all flash, which indicates that the transmission line test is normal; when the red indicator light flickers, the test of the corresponding transmission line is abnormal, a cable fault exists, and the corresponding transmission line needs to be repaired or replaced.
Fig. 8 is a schematic flowchart of a method for testing various transmission lines according to an embodiment of the present application, which can be performed by the apparatus for testing various transmission lines according to the above embodiment, and as shown in fig. 8, the method for testing various transmission lines includes:
and S110, testing the corresponding optical fiber to be tested according to the light receiving and transmitting state of the optical module.
Specifically, the testing the corresponding optical fiber to be tested according to the transmitting/receiving light state of the optical module may include: testing the optical fibers to be tested in sequence; testing an optical fiber to be tested comprises: controlling the first light module to emit light; according to whether the second optical module receives light in response to the first optical module, testing a first set parameter of the corresponding optical fiber to be tested, wherein the first set parameter can comprise parameters such as line sequence, on-off and attenuation, and the like, namely the testing method and the testing device provided by the embodiment of the application can test the parameters such as line sequence, on-off and attenuation of the optical fiber to be tested and generate a ledger; the first optical module is a corresponding optical module in active test equipment, and the second optical module is a corresponding optical module in passive test equipment.
It should be noted that the above embodiments of the testing process of the optical fiber to be tested have been described in detail, and are not described herein again.
And S120, testing the corresponding radio frequency line to be tested according to the output voltage of the first comparator.
Specifically, testing the corresponding radio frequency line to be tested according to the output voltage of the first comparator may include: sequentially testing the communication channels of the radio frequency line to be tested until one communication channel is tested to establish communication connection; testing a communication channel includes: controlling the initial output voltage of the corresponding first comparator to be a first voltage; controlling the external applied voltage of the corresponding first comparator in the active test equipment and the passive test equipment to control the output voltage of the corresponding first comparator to jump to a second voltage; according to whether the output voltage of the corresponding first comparator in the active test equipment and the passive test equipment jumps or not, testing a second set parameter of the corresponding radio frequency line to be tested, wherein the second set parameter can comprise parameters such as line sequence, on-off and error code, namely the test method and the test device provided by the embodiment of the application can test the parameters such as line sequence, on-off and error code of the radio frequency line to be tested and generate a ledger; wherein, the first voltage and the second voltage have different levels.
It should be noted that, the above embodiments of the testing process of the radio frequency line to be tested have been described in detail, and are not described herein again. The communication channel of the radio frequency line to be tested is tested in sequence until one communication channel is tested to establish communication connection, because once one communication channel passes the test, the communication channel can establish one communication channel, and the communication channel can complete information intercommunication between the active test equipment and the passive test equipment in the following test process, thereby completing all radio frequency tests. The first voltage may be, for example, a low-level voltage, and the second voltage may be, for example, a high-level voltage.
And S130, testing the corresponding network cable to be tested according to the output voltage of the second comparator.
Specifically, testing the corresponding network cable to be tested according to the output voltage of the second comparator may include: sequentially testing cable pairs of the network cable to be tested; the cables in the cable pairs are electrically connected with the comparison input ends of the corresponding second comparators; testing a set of cable pairs includes: controlling the initial output voltage of the corresponding second comparator to be a third voltage; during a first period, the external applied voltage on the control cable pair is controlled to control the output voltage of the corresponding second comparator to jump to a fourth voltage; controlling the external applied voltage of the corresponding second comparator in the active test equipment and the passive test equipment to control the output voltage of the corresponding second comparator to jump to a third voltage in a second period; according to the jump timing sequence of the output voltage of the corresponding second comparator in the active test equipment and the passive test equipment, testing a third set parameter of the corresponding network cable to be tested, wherein the third set parameter can comprise parameters such as line sequence, on-off and error code, and the like; wherein, the third voltage and the fourth voltage have different levels.
It should be noted that the above embodiments of the testing process of the network cable to be tested have been described in detail, and are not described herein again. In addition, the third voltage may be, for example, a high level voltage, the fourth voltage may be, for example, a low level voltage, and the first period and the second period may each last, for example, 50 ms.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A testing device for multiple transmission lines is characterized by comprising:
the system comprises two test devices, a transmission line to be tested is respectively spliced with the two test devices, the two test devices comprise an active test device and a passive test device, and the transmission line to be tested comprises an optical fiber to be tested, a radio frequency line to be tested and a network cable to be tested;
the test apparatus includes:
the optical fiber test circuit comprises a plurality of optical modules, the optical modules are arranged in one-to-one correspondence with the optical fibers to be tested, and the optical fiber test circuit is used for testing the corresponding optical fibers to be tested according to the light receiving and transmitting states of the optical modules;
the radio frequency test circuit comprises a plurality of first comparators, the first comparators are arranged in one-to-one correspondence with the communication channels of the radio frequency lines to be tested, and the radio frequency test circuit is used for testing the corresponding radio frequency lines to be tested according to the output voltage of the first comparators;
the network cable test circuit comprises a plurality of second comparators, the cable pair of the network cable to be tested is arranged corresponding to at least one second comparator, and the network cable test circuit is used for testing the corresponding network cable to be tested according to the output voltage of the second comparator;
the radio frequency test circuit further comprises:
the clamping resistor circuits are arranged in one-to-one correspondence with the first comparators and comprise first impedance elements and second impedance elements, the first impedance elements are electrically connected with the forward ends of the corresponding first comparators, and the second impedance elements are electrically connected with the reverse ends of the corresponding first comparators;
the first comparator is used for adjusting the output voltage of the first comparator according to the external applied voltage of the first comparator and the external applied voltage of the clamping resistor circuit, and the radio frequency test circuit is used for testing the corresponding radio frequency line to be tested according to the jump state of the output voltage of the first comparator;
the network cable test circuit further comprises:
the initial setting circuit is electrically connected with all the second comparators and is used for setting initial input voltages of the second comparators;
the relay groups are arranged corresponding to the at least one second comparator, and the relay groups are arranged corresponding to the cables in a one-to-one manner;
the network cable test circuit is used for controlling the on-off state of the relay group to adjust the external applied voltage of the second comparator, the second comparator is used for adjusting the output voltage of the second comparator according to the external applied voltage of the second comparator, the initial input voltage and the voltage on the corresponding cable pair, and the network cable test circuit is used for testing the corresponding network cable to be tested according to the jump state of the output voltage of the second comparator.
2. The apparatus for testing a plurality of transmission lines according to claim 1, wherein said optical fiber test circuit further comprises:
the optical module enabling circuits are electrically connected with the optical modules in a one-to-one correspondence mode, each optical module enabling circuit comprises a power supply and a switch component, and the switch component is used for controlling the on-off between the power supply and a power supply end of the corresponding optical module.
3. The apparatus for testing a plurality of transmission lines according to claim 1, wherein said initial setting circuit comprises:
the plurality of third impedance elements are connected in series between an external power supply and a ground terminal, and at least one third impedance element is connected in series between a forward terminal and a reverse terminal of the second comparator.
4. The apparatus for testing a plurality of transmission lines according to claim 1, further comprising:
the state indicating component is used for indicating the test results of the optical fiber test circuit, the radio frequency test circuit and the network cable test circuit.
5. A method for testing a plurality of types of transmission lines, which is performed by the apparatus for testing a plurality of types of transmission lines according to any one of claims 1 to 4, comprising:
testing the corresponding optical fiber to be tested according to the receiving and transmitting light state of the optical module;
testing the corresponding radio frequency line to be tested according to the output voltage of the first comparator;
and testing the corresponding network cable to be tested according to the output voltage of the second comparator.
6. The method for testing various transmission lines according to claim 5, wherein the step of testing the corresponding optical fiber to be tested according to the transmitting/receiving optical state of the optical module comprises:
testing the optical fibers to be tested in sequence;
the testing of one optical fiber to be tested comprises:
controlling the first light module to emit light;
testing a first set parameter of the corresponding optical fiber to be tested according to whether a second optical module receives light in response to the first optical module;
the first optical module is the corresponding optical module in the active test equipment, and the second optical module is the corresponding optical module in the passive test equipment.
7. The method for testing various transmission lines according to claim 5, wherein the step of testing the corresponding radio frequency lines to be tested according to the output voltages of the first comparators comprises the steps of:
sequentially testing the communication channels of the radio frequency line to be tested until one communication channel is tested to establish communication connection;
testing one of the communication channels comprises:
controlling the initial output voltage of the corresponding first comparator to be a first voltage;
controlling an externally applied voltage of the corresponding first comparator in the active test device and the passive test device to control an output voltage of the corresponding first comparator to jump to a second voltage;
testing a second set parameter of the corresponding radio frequency line to be tested according to whether the output voltage of the corresponding first comparator in the active test equipment and the passive test equipment jumps or not;
wherein the first voltage and the second voltage have different levels.
8. The method for testing multiple transmission lines according to claim 5, wherein the step of testing the corresponding network line to be tested according to the output voltage of the second comparator comprises:
sequentially testing cable pairs of the network cable to be tested; wherein the cables in the cable pair are electrically connected with the comparison input end of the corresponding second comparator;
testing a set of the cable pairs comprises:
controlling the initial output voltage of the corresponding second comparator to be a third voltage;
during a first period, controlling an externally applied voltage on the cable pair to control the output voltage of the corresponding second comparator to jump to a fourth voltage;
controlling the external applied voltage of the corresponding second comparator in the active test device and the passive test device to control the output voltage of the corresponding second comparator to jump to the third voltage in a second period;
testing a third set parameter of the corresponding network cable to be tested according to the jump timing sequence of the output voltage of the corresponding second comparator in the active test equipment and the passive test equipment;
wherein the third voltage and the fourth voltage have different levels.
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