CN-121984583-A - System and method for testing signals of communication optical fiber connectors of frequency converter

CN121984583ACN 121984583 ACN121984583 ACN 121984583ACN-121984583-A

Abstract

The invention discloses a frequency converter communication optical fiber connector signal testing system and a frequency converter communication optical fiber connector signal testing method, which belong to the technical field of optical fiber communication testing. The corresponding testing method comprises two modes of rapid screening and accurate analysis, and the high-efficiency and accurate detection of the conduction state, the signal quality and the fault type of the optical fiber transmitting head and the receiving head is realized through a standardized operation flow, a definite judgment threshold value and an automatic algorithm. The system is suitable for complex environments such as mines, supports multiple types of optical fiber interfaces, is simple and convenient to operate and high in portability, and the testing method is clear in flow and accurate in judgment, so that the fault detection efficiency and maintenance quality of the optical fiber communication component of the frequency converter are remarkably improved.

Inventors

CUI JIACAI
CUI GUANGDONG
CUI NA
ZHENG XIAOMING
XU AIGUO
WU FAJUN
ZHENG XINLAI
LENG ZICHAO

Assignees

淮北矿业股份有限公司

Dates

Publication Date: 20260505
Application Date: 20251216

Claims (10)

1. The frequency converter communication optical fiber connector signal testing system is characterized by comprising a modularized main body unit and a rapid detection unit, wherein the modularized main body unit and the rapid detection unit are in communication connection through an internal bus to form a complete testing system; the rapid detection unit includes: The signal trigger circuit comprises a button SB1, wherein the button SB1 is used for controlling the on-off of the circuit so as to simulate the trigger condition of the optical fiber signal; The optical fiber head interface is connected with the signal output end of the signal trigger circuit so as to ensure the integrity of a signal transmission path; The resistor voltage division network comprises a first voltage division resistor R1 and a second voltage division resistor R2, and a normal working voltage threshold is set through voltage division; The voltage detection module is used for measuring the output voltage of the circuit so as to judge the working state of the optical fiber head; The optical fiber head interface comprises a positive electrode interface J1 and a negative electrode interface J2, the digital multimeter is provided with a diode buzzer, and two meter pens of the diode buzzer are respectively connected with the positive electrode interface and the negative electrode interface of the optical fiber head interface and are used for independently detecting the conduction state of the optical fiber transmitting head when the signal trigger circuit is disconnected.
2. The system for testing signals of a fiber optic connector for frequency converter of claim 1, wherein said modular body unit comprises: The signal generation module is used for generating a standard test signal or a user-defined test signal which accords with the optical fiber communication characteristic of the frequency converter and simulating the normal working signal output of the optical fiber transmitting head; the signal receiving and conditioning module is used for receiving signals fed back by the tested optical fiber receiving head, amplifying, filtering and level conditioning the signals, and outputting stable and analyzable signals; The signal analysis module is internally provided with a high-speed data collector and a special algorithm and is used for analyzing the optical power, the signal-to-noise ratio, the eye pattern and the bit error rate parameters of the conditioned signals and judging the communication quality of the optical fiber transmitting head and the receiving head; The data processing and storing module is used for carrying out trend analysis and fault diagnosis on the output result of the signal analyzing module and storing test parameters, process data and diagnosis results; the man-machine interaction module comprises a display screen and an operation assembly, and is used for displaying a test state, parameters and results and supporting a user to perform test mode switching and parameter setting operation; The interface module provides a replaceable standard optical fiber connector interface, is at least compatible with SC/APC and LC/UPC types and is used for connecting a tested optical fiber transmitting head and a receiving head; The power module provides a stable direct current power supply for the modularized main body unit and the rapid detection unit.
3. The system for testing the signal of the communication optical fiber connector of the frequency converter according to claim 2, wherein the first voltage dividing resistor R1 and the second voltage dividing resistor R2 are connected in series to the output end of the power module, the voltage detecting module is connected in parallel to two ends of the second voltage dividing resistor R2 and is used for measuring the voltage dividing value on the second voltage dividing resistor R2 so as to judge the working state of the optical fiber connector, the resistance value of the first voltage dividing resistor R1 is 3.3kΩ, the resistance value of the second voltage dividing resistor R2 is 200 Ω, and the voltage threshold on the second voltage dividing resistor R2 is set to be 0.27V in normal operation through the proportional relation between the resistance values of the first voltage dividing resistor R1 and the second voltage dividing resistor R2.
4. The system for testing the signals of the optical fiber connector for the frequency converter according to claim 2, wherein the signal generating module supports the output rate of the pulse signals adapting to the high-speed communication requirement of the frequency converter, the frequency and the amplitude of the signals can be set by the human-computer interaction module in a self-defining mode, the frequency adjusting range is 1-100MHz, and the amplitude adjusting range is 0.5-5V.
5. The system of claim 2, wherein the special algorithm of the signal analysis module comprises a fault feature library of the optical fiber communication of the frequency converter, wherein the fault feature library stores corresponding parameter thresholds of the light emitting diode under various faults, and can automatically identify the fault type by comparing measured parameters with standard parameter thresholds.
6. The system for testing signals of a communication optical fiber connector of a frequency converter according to claim 2, wherein the power module supports 5V direct current power supply, 5V/6V dry battery or lithium battery power supply, and is internally provided with a voltage stabilizing circuit and an overcurrent and reverse polarity protection assembly, and is adapted to a use scene without an external power supply.
7. The system of claim 1, further comprising a set of wires, the set of wires including blue, green, black and gray lines, the set of wires configured to connect the signal trigger circuit, the voltage detection module, the power module, the resistor divider network and the fiber head interface to form a complete detection circuit.
8. A method for testing signals of a communication optical fiber connector of a frequency converter, which is applicable to the system for testing signals of the communication optical fiber connector of the frequency converter according to any one of claims 1 to 7, and is characterized by comprising a rapid screening mode and a precise analysis mode, and specifically comprising the following steps: s1, testing preparation, namely checking the hardware connection integrity of a testing system, replacing an optical fiber connector of an interface module according to the type of an optical fiber interface of a tested frequency converter, selecting a power supply mode, and starting the system to finish self-checking; s2, a rapid screening mode, wherein the following sub-operations are executed: S2-1, correspondingly connecting a tested optical fiber transmitting head or receiving head to optical fiber head interfaces J1 and J2 of the rapid detection unit; s2-2, if the tested piece is an optical fiber transmitting head, switching the voltage detection module to a diode buzzer, disconnecting the button SB1, if the buzzer sounds, judging that the transmitting head is normally conducted, and if the buzzer does not sound, judging that the transmitting head is damaged; S2-3, if the tested piece is an optical fiber receiving head or a complete communication link, switching the voltage detection module to a 20V range direct current voltage gear, closing a button SB1, observing a voltage display value, displaying 0.27V plus or minus 0.02V, judging that the tested piece works normally, displaying near 0V, judging that the tested piece is short-circuited, displaying near 5V, and judging that the tested piece is open-circuited; s3, executing the following sub-operations in the accurate analysis mode: S3-1, respectively connecting a tested optical fiber transmitting head and a tested optical fiber receiving head into a signal output end and a signal input end of the modularized main body unit through an interface module, and establishing a complete test link; S3-2, setting test signal parameters and analysis thresholds through a human-computer interaction module; S3-3, starting the signal generation module to output a standard test signal, transmitting the standard test signal through a tested transmitting head, receiving the standard test signal by a receiving head, feeding the standard test signal back to the signal receiving and conditioning module, and collecting the conditioned signal by a high-speed data collector of the signal analysis module; s3-4, a signal analysis module processes the acquired signals through a special algorithm, calculates parameters of optical power, signal-to-noise ratio, eye pattern quality and bit error rate, combines a frequency converter optical fiber communication fault feature library, compares the parameters with a preset threshold, judges that the communication quality is qualified if all the parameters are within a threshold range, judges that the optical power is lower than the threshold, judges that the luminous attenuation of a transmitting head or the sensitivity of a receiving head is insufficient, judges that the bit error rate is higher than the threshold, and judges that the link is interfered or damaged by components; S4, after the test is completed, the data processing and storage module automatically stores the test result, the test result can be checked through the man-machine interaction module, or historical data is exported through the USB interface, if the signal analysis module diagnoses the fault, the data processing and storage module automatically records a parameter curve and a time stamp when the fault occurs, and the man-machine interaction module displays the fault type and the troubleshooting suggestion by using a red warning mark; S5, closing a system power supply after the test is finished, disconnecting the tested piece from the test system, and finishing the equipment.
9. The method for testing signals of a communication optical fiber connector of a frequency converter according to claim 8, wherein in S3-4, the fault signature library stores at least the following parameter signatures corresponding to the fault types: The luminous attenuation of the light emitting diode is that the light power is < -18dBm, the signal to noise ratio is 25dB-30dB, and the bit error rate is 10 -8 -10 -6 ; the receiving head is disconnected, the optical power is < -25dBm, the signal to noise ratio is <25dB, and the bit error rate is >10 -6 ; Short circuit of receiving head, light power is near 0dBm, signal to noise ratio is less than 20dB, error rate is approximately equal to 1; The signal interference that the optical power is within the range of-18 dBm to-12 dBm, the signal to noise ratio is less than 30dB, and the bit error rate is more than 10 -8 .
10. The method for testing the signal of the communication optical fiber connector of the frequency converter according to claim 8, wherein the S2 and the S3 can be flexibly switched, a user can position the fault component through a rapid screening mode, and then the fault cause is deeply diagnosed through a precise analysis mode without repeatedly connecting the tested component.

Description

System and method for testing signals of communication optical fiber connectors of frequency converter Technical Field The invention belongs to the technical field of optical fiber communication testing, and particularly relates to a system and a method for testing signals of a communication optical fiber connector of a frequency converter. Background At present, key industrial equipment such as mine main hoisting systems, coal machines and the like widely adopt an ABB frequency converter, and internal communication of the ABB frequency converter adopts an optical fiber communication mode so as to reduce signal interference and improve communication quality. However, in the long-term use process, the light-emitting diode of the optical fiber transmitting head is easily subjected to light-emitting attenuation and damage due to the influence of factors such as equipment vibration, environmental humidity change, component aging and the like, and the optical fiber receiving head is also likely to have faults such as open circuit and short circuit. On the one hand, the testing equipment has single function, the general oscilloscope cannot adapt to the high-speed and anti-interference characteristics of the optical fiber communication of the frequency converter, the special tester can only realize single parameter detection, and the requirements of rapid screening and accurate analysis are difficult to meet. On the other hand, the testing method relies on manual experience, the fault is detected by gradually replacing the components, time and labor are consumed, and the method lacks clear judgment standards and is easy to misjudge. In addition, the existing equipment has low integration level and poor portability, is difficult to adapt to the test environment of complex sites such as mines, has low automation degree and has higher requirements on the technical level of operators. Disclosure of Invention The invention aims to provide a frequency converter communication optical fiber connector signal testing system and method, which are used for solving the problems in the background technology. In order to achieve the purpose, the invention provides the technical scheme that the frequency converter communication optical fiber connector signal testing system comprises a modularized main body unit and a rapid detection unit, wherein the modularized main body unit and the rapid detection unit are in communication connection through an internal bus to form a complete testing system; the rapid detection unit includes: The signal trigger circuit comprises a button SB1, wherein the button SB1 is used for controlling the on-off of the circuit so as to simulate the trigger condition of the optical fiber signal; The optical fiber head interface is connected with the signal output end of the signal trigger circuit so as to ensure the integrity of a signal transmission path; The resistor voltage division network comprises a first voltage division resistor R1 and a second voltage division resistor R2, and a normal working voltage threshold is set through voltage division; The voltage detection module is used for measuring the output voltage of the circuit so as to judge the working state of the optical fiber head; The optical fiber head interface comprises a positive electrode interface J1 and a negative electrode interface J2, the digital multimeter is provided with a diode buzzer, and two meter pens of the diode buzzer are respectively connected with the positive electrode interface and the negative electrode interface of the optical fiber head interface and are used for independently detecting the conduction state of the optical fiber transmitting head when the signal trigger circuit is disconnected. Preferably, the modular body unit includes: The signal generation module is used for generating a standard test signal or a user-defined test signal which accords with the optical fiber communication characteristic of the frequency converter and simulating the normal working signal output of the optical fiber transmitting head; the signal receiving and conditioning module is used for receiving signals fed back by the tested optical fiber receiving head, amplifying, filtering and level conditioning the signals, and outputting stable and analyzable signals; The signal analysis module is internally provided with a high-speed data collector and a special algorithm and is used for analyzing the optical power, the signal-to-noise ratio, the eye pattern and the bit error rate parameters of the conditioned signals and judging the communication quality of the optical fiber transmitting head and the receiving head; The data processing and storing module is used for carrying out trend analysis and fault diagnosis on the output result of the signal analyzing module and storing test parameters, process data and diagnosis results; the man-machine interaction module comprises a display screen and an operation assembly, and is used for display