CN117647695B - Shielding efficiency test system and method for cable connector - Google Patents
Shielding efficiency test system and method for cable connector Download PDFInfo
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Abstract
The invention discloses a shielding effectiveness test system and a testing method of a cable connector, which belong to the field of magnetic variable and electric variable measurement.
Description
Technical Field
The invention belongs to the field of magnetic variable and electric variable measurement, and particularly relates to a shielding effectiveness test system and a shielding effectiveness test method of a cable connector.
Background
The cable connectors are not protected by the sheath, the shielding parts of the cable connectors are directly exposed to the environment, and the connection mode among the cable connectors is easily affected by vibration. After long-term vibration abrasion or chemical corrosion, the electromagnetic shielding effectiveness of the cable connector is obviously reduced, so that the transmission line between the high-voltage connectors is seriously disturbed by the space electromagnetic field. Therefore, there is a need for a device and a method for testing the shielding effectiveness of a cable connector, which can effectively test and evaluate the electromagnetic shielding effectiveness of the cable connector, and the problems in the prior art are all solved;
for example, in chinese patent publication No. CN114755500B, a device and method for testing shielding effectiveness of a connector are disclosed. The device comprises: the device comprises a first clamp, a second clamp, a reference cable and a test unit; the first clamp clamps the connector to be tested, the shielding part of the connector to be tested is electrically connected with the first clamp, a first shielding cavity is formed in the shielding part of the connector to be tested and the first clamp, and the terminal part and the body of the connector to be tested are both positioned in the first shielding cavity; a second shielding cavity is formed in the second clamp, and the first end of the reference cable is positioned in the second shielding cavity; the wire core of the second end of the reference cable is electrically connected with the terminal part of the connector to be tested, and the shielding layer is electrically connected with the first clamp; the test unit is electrically connected with the terminal part of the connector to be tested, and the test unit at least generates an electromagnetic field in the space around the shielding part of the connector to be tested and is used for detecting the signal intensity of the terminal part of the connector to be tested.
The problems proposed in the background art exist in the above patents: the method and the system for testing the shielding effectiveness of the cable connector are designed in order to solve the problems that the shielding effectiveness of the cable connector is low in judgment accuracy due to the fact that the shielding effectiveness of the cable connector cannot be effectively and accurately analyzed based on the identification of the omnibearing shielding effectiveness.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a shielding effectiveness test system and a test method of a cable connector.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a shielding effectiveness test method of a cable connector comprises the following specific steps:
s1, connecting ends of two cables by using a cable connector to be tested, inputting a designated transmitting signal into an input end of the cable under the action of a non-interference signal, receiving an output signal at a receiving end of the cable, setting the output signal as the non-interference output signal, and dividing the cable connector into a plurality of analog sections with equal lengths by taking the connecting position of the cable connector as the center;
s2, placing interference sources with specified interference frequencies and interference intensities according to the central positions of the analog segments respectively, inputting specified transmitting signals to the input end of the cable after starting the interference sources, receiving output signals at the receiving end of the cable, and setting the output signals as corresponding analog segment output signals;
s3, substituting the signal intensity of the output signal of the corresponding analog segment and the signal intensity of the interference-free output signal into a signal intensity abnormal value calculation strategy to calculate the signal intensity abnormal value of the corresponding analog segment;
s4, substituting the signal frequency of the output signal of the corresponding analog segment and the signal frequency of the interference-free output signal into a signal frequency outlier calculation strategy to calculate the signal frequency outlier of the corresponding analog segment;
s5, substituting the calculated signal intensity abnormal value, the calculated signal frequency abnormal value and the calculated position of the corresponding analog segment into a signal integral shielding abnormal value calculation strategy to calculate the signal integral shielding abnormal value of the cable connector;
s6, comparing the calculated signal integral shielding abnormal value of the cable connector with a set signal abnormal threshold value of the cable connector, if the obtained signal integral shielding abnormal value of the cable connector is larger than or equal to the set signal abnormal threshold value of the cable connector, judging that the shielding effectiveness of the cable connector is unqualified, and if the obtained signal integral shielding abnormal value of the cable connector is smaller than the set signal abnormal threshold value of the cable connector, judging that the shielding effectiveness of the cable connector is qualified.
Specifically, the step S1 includes the following specific steps:
s11, connecting the connecting ends of two cables by using cable connectors to be tested, connecting the two ends of the cable connectors with the connecting ends of the two cables respectively, placing the cable connectors connected with the connecting ends of the two cables in a box body with no interference sources around, inputting appointed transmitting signals to the input ends of the cables by a stable signal transmitting source under the action of the interference-free signals, receiving output signal data of the cables at the receiving end of the cables, wherein the output signal data of the cables comprises signal intensity data and signal frequency data of each time point of the cable output signals, and setting the received cable output signals under the action of the interference-free signals as interference-free output signals;
s12, dividing the cable connector into a plurality of simulation segments with equal length according to the horizontal length by taking the connection position of the cable connector as the center.
Specifically, the S2 includes the following specific contents:
s21, searching the middle position of the analog section to obtain an interference source with specified interference frequency and interference intensity, respectively placing the interference sources at the middle position of the corresponding analog section in a left-to-right sequence, and starting the interference sources until the interference sources work stably, wherein the working stability of the interference sources can be set to be that the interference frequency and the interference intensity are kept stable for 10S;
s22, after the interference source works stably, inputting a designated transmitting signal to the input end of the cable, receiving an output signal at the receiving end of the cable, setting the received output signal as a corresponding analog segment output signal, placing the interference source at the middle position of each corresponding analog segment, and repeating the operation to obtain a corresponding output signal of each corresponding analog segment;
specifically, the signal intensity outlier calculation strategy of S3 includes the following specific steps:
s31, acquiring signal intensity of an output signal of a corresponding analog segment and signal intensity of an undisturbed output signal, correspondingly acquiring signal intensity of a designated transmitting signal at a corresponding moment after starting up, and acquiring signal intensity of the output signal of the corresponding analog segment and the signal intensity of the undisturbed output signal at the corresponding moment;
s32, leading the signal intensity of the corresponding analog segment output signal and the signal intensity of the corresponding moment of the non-interference output signal into a signal intensity abnormal value calculation formula to calculate the signal intensity abnormal value of the corresponding analog segment, wherein the signal intensity abnormal value calculation formula of the i-th corresponding analog segment is as follows:wherein T is the time length of the output signal, dt is the time integral, < + >>For the signal strength at the i-th corresponding analog segment t time,/>The signal strength at the moment t of the signal is outputted without interference.
Specifically, the specific content of the signal frequency outlier calculation strategy in S4 includes the following specific steps:
s41, acquiring signal intensity of an output signal of a corresponding analog segment and signal frequency of an undisturbed output signal, correspondingly acquiring signal frequency of a corresponding moment after a designated transmitting signal is started, and acquiring signal frequency of the corresponding moment of the output signal of the corresponding analog segment and the signal frequency of the corresponding moment of the undisturbed output signal, wherein the signal frequency is divided into m equal set time segments according to time;
s42, leading signal frequencies of corresponding analog segment output signals and corresponding moments of non-interference output signals into a signal frequency outlier calculation formula to calculate signal frequency outliers of corresponding analog segments, wherein the signal frequency outlier calculation formula of the i-th corresponding analog segment is as follows:wherein->Signal frequency average value of j-th period of non-interference output signal, +.>The signal frequency average value of the j-th period of the output signal of the i-th corresponding analog period.
Specifically, the specific content of the signal overall mask outlier calculation strategy in S5 includes the following specific steps:
s51, obtaining the calculated abnormal value of the signal intensity of each corresponding analog segment, substituting the calculated abnormal value of the signal intensity of each corresponding analog segment into a calculation formula of the abnormal value of the signal overall intensity to calculate the abnormal value of the signal overall intensity, wherein the calculation formula of the abnormal value of the signal overall intensity is as follows:wherein n is the number of analog segments, < ->The distance from the middle position of the ith corresponding analog segment to the connecting position of the cable connector;
s52, obtaining the calculated signal frequency outliers of each corresponding analog segment, and substituting the calculated signal frequency outliers of each corresponding analog segment into a signal overall frequency outlier calculation formula to calculate the signal overall frequency outlier, wherein the signal overall frequency outlier calculation formula is as follows:；
s53, obtaining the calculated signal overall strength abnormal value and the signal overall frequency abnormal value, and substituting the obtained signal overall strength abnormal value and the obtained signal overall frequency abnormal value into a signal overall shielding abnormal value calculation formula to calculate a signal overall shielding abnormal value, wherein the signal overall shielding abnormal value calculation formula is as follows:wherein->The duty cycle coefficient is the abnormal value of the overall intensity of the signal,for the signal overall frequency outlier duty cycle, +.>Here, the signal abnormality threshold value is +.>And->The value of the method is as follows: substituting test data of 5000 groups of produced cable connectors into a signal integral shielding abnormal value calculation formula to calculate signal integral shielding abnormal values, then employing an expert to distinguish good products of the cable connectors, substituting distinguishing results and the calculated signal integral shielding abnormal values into fitting software, and outputting optimal signal abnormal threshold values which accord with judging accuracy>And->Is a value of (2);
the shielding effectiveness test system of the cable connector is realized based on the shielding effectiveness test method of the cable connector, and comprises a test module, a test signal acquisition module, a signal intensity abnormal value calculation module, a signal frequency abnormal value calculation module, a signal integral shielding abnormal value calculation module, a data comparison module and a control module, wherein the test module is used for connecting the connecting ends of two cables by the cable connector to be tested, inputting a designated transmitting signal into the input end of the cable under the action of a non-interference signal, receiving an output signal at the receiving end of the cable, setting the output signal as the non-interference output signal, dividing the cable connector into a plurality of analog sections with equal length according to the horizontal length by taking the connecting position of the cable connector as the center, after the interference sources are started, inputting the designated transmitting signal into the input end of the cable, receiving the output signal at the receiving end of the cable, setting the output signal at the corresponding analog section, and substituting the signal intensity abnormal value calculation module into the corresponding signal intensity abnormal value of the corresponding analog section of the output signal to the signal with the strength abnormal value of the corresponding analog section.
Specifically, the signal frequency outlier calculating module is configured to substitute the signal frequency of the output signal of the corresponding analog segment and the signal frequency of the non-interference output signal into a signal frequency outlier calculating strategy to calculate a signal frequency outlier of the corresponding analog segment, and the signal integral shielding outlier calculating module is configured to substitute the calculated signal intensity outlier of the corresponding analog segment, the signal frequency outlier and the position of the corresponding analog segment into a signal integral shielding outlier calculating strategy to calculate a signal integral shielding outlier of the cable connector.
Specifically, the data comparison module is used for comparing the calculated signal integral shielding abnormal value of the cable connector with a set signal abnormal threshold value of the cable connector, and the control module is used for controlling the test module, the test signal acquisition module, the signal intensity abnormal value calculation module, the signal frequency abnormal value calculation module, the signal integral shielding abnormal value calculation module and the data comparison module to operate.
An electronic device, comprising: a processor and a memory, wherein the memory stores a computer program for the processor to call;
the processor executes the shielding effectiveness test method of the cable connector by calling the computer program stored in the memory.
A computer readable storage medium storing instructions that, when executed on a computer, cause the computer to perform a method of testing shielding effectiveness of a cable connector as described above.
Compared with the prior art, the invention has the beneficial effects that:
the method comprises the steps of connecting the connecting ends of two cables by using a cable connector to be tested, inputting a specified emission signal into the input end of the cable under the action of an undisturbed signal, receiving an output signal into the receiving end of the cable, setting the output signal as the undisturbed output signal, placing the interference sources with specified interference frequency and interference intensity according to the central positions of all analog segments, inputting the specified emission signal into the input end of the cable after starting the interference sources, receiving the output signal into the receiving end of the cable, setting the output signal into the output signal of the corresponding analog segment, substituting the signal intensity of the output signal of the corresponding analog segment and the signal intensity of the undisturbed output signal into a signal intensity outlier calculation strategy, calculating the signal frequency outlier of the corresponding analog segment into the signal frequency outlier calculation strategy, substituting the calculated signal intensity outlier of the corresponding analog segment, and the signal shielding outlier of the position of the corresponding analog segment into a calculation strategy of the signal shielding outlier of the cable connector, carrying out the shielding effect of the cable connector, accurately judging the shielding effect of the cable connector and the cable connector based on the set shielding effect of the cable is accurately compared with the shielding effect of the cable.
Drawings
Fig. 1 is a flow chart of a shielding effectiveness testing method of a cable connector according to the present invention;
FIG. 2 is a schematic diagram of an overall frame of a shielding effectiveness testing system of a cable connector according to the present invention;
fig. 3 is a schematic diagram of the electronic device according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1
Referring to fig. 1, an embodiment of the present invention is provided: a shielding effectiveness test method of a cable connector comprises the following specific steps:
s1, connecting ends of two cables by using a cable connector to be tested, inputting a designated transmitting signal into an input end of the cable under the action of a non-interference signal, receiving an output signal at a receiving end of the cable, setting the output signal as the non-interference output signal, and dividing the cable connector into a plurality of analog sections with equal lengths by taking the connecting position of the cable connector as the center;
it should be noted that, S1 includes the following specific steps:
s11, connecting the connecting ends of two cables by using cable connectors to be tested, connecting the two ends of the cable connectors with the connecting ends of the two cables respectively, placing the cable connectors connected with the connecting ends of the two cables in a box body with no interference sources around, inputting appointed transmitting signals to the input ends of the cables by using a stable signal transmitting source under the action of the interference-free signals, receiving output signal data of the cables at the receiving end of the cables, wherein the output signal data of the cables comprises signal intensity data and signal frequency data of each time point of the cable output signals, and setting the cable output signals under the action of the received interference-free signals as interference-free output signals;
s12, dividing the cable connector into a plurality of simulation sections with equal length according to the horizontal length by taking the connection position of the cable connector as the center;
s2, placing interference sources with specified interference frequencies and interference intensities according to the central positions of the analog segments respectively, inputting specified transmitting signals to the input end of the cable after starting the interference sources, receiving output signals at the receiving end of the cable, and setting the output signals as corresponding analog segment output signals;
here, S2 includes the following specific contents:
s21, searching the middle position of the analog section to obtain an interference source with specified interference frequency and interference intensity, respectively placing the interference sources at the middle position of the corresponding analog section in a left-to-right sequence, and starting the interference sources until the interference sources work stably, wherein the working stability of the interference sources can be set to be that the interference frequency and the interference intensity are kept stable for 10S;
s22, after the interference source works stably, inputting a designated transmitting signal to the input end of the cable, receiving an output signal at the receiving end of the cable, setting the received output signal as a corresponding analog segment output signal, placing the interference source at the middle position of each corresponding analog segment, and repeating the operation to obtain a corresponding output signal of each corresponding analog segment;
s3, substituting the signal intensity of the output signal of the corresponding analog segment and the signal intensity of the interference-free output signal into a signal intensity abnormal value calculation strategy to calculate the signal intensity abnormal value of the corresponding analog segment;
it should be noted that, the signal strength outlier calculation strategy of S3 includes the following specific steps:
s31, acquiring signal intensity of an output signal of a corresponding analog segment and signal intensity of an undisturbed output signal, correspondingly acquiring signal intensity of a designated transmitting signal at a corresponding moment after starting up, and acquiring signal intensity of the output signal of the corresponding analog segment and the signal intensity of the undisturbed output signal at the corresponding moment;
s32, leading the signal intensity of the corresponding analog segment output signal and the signal intensity of the corresponding moment of the non-interference output signal into a signal intensity abnormal value calculation formula to calculate the signal intensity abnormal value of the corresponding analog segment, wherein the signal intensity abnormal value calculation formula of the i-th corresponding analog segment is as follows:wherein T is the length of time of the output signalDegree, dt is the time integral, +.>For the signal strength at the i-th corresponding analog segment t time,/>The signal intensity at the moment of outputting the signal t without interference;
s4, substituting the signal frequency of the output signal of the corresponding analog segment and the signal frequency of the interference-free output signal into a signal frequency outlier calculation strategy to calculate the signal frequency outlier of the corresponding analog segment;
it should be noted that, the specific content of the signal frequency outlier calculation strategy in S4 includes the following specific steps:
the interference signal may have various effects on the frequency of the electrical signal, including in particular the following aspects:
1. spectral overlap: the interference signal may overlap with the electrical signal in the frequency domain, resulting in the frequency of the electrical signal being masked or partially overlapped by the interference signal, thereby making the originally clear signal blurred or unrecognizable;
2. signal-to-noise ratio decreases: the interfering signal introduces additional noise that negatively affects the signal-to-noise ratio of the electrical signal. A decrease in signal-to-noise ratio may result in a decrease in signal quality, resulting in a decrease in reliability of the received signal;
3. signal distortion: the interfering signal may change the waveform shape of the electrical signal, resulting in signal distortion. Signal distortion can cause frequency components of the signal to change, thereby preventing the signal from being properly transmitted or decoded;
4. frequency drift: the frequency variation of the interfering signal may cause a frequency drift of the electrical signal. The frequency drift can cause the electric signal to deviate in the frequency spectrum, so that the receiving end cannot correctly identify and process the signal;
in summary, the influence of the interference signal on the frequency of the electric signal is mainly reflected in the aspects of spectrum overlapping, signal-to-noise ratio reduction, signal distortion, frequency drift and the like. These effects will directly affect the reliability and accuracy of the signal;
s41, acquiring signal intensity of an output signal of a corresponding analog segment and signal frequency of an undisturbed output signal, correspondingly acquiring signal frequency of a corresponding moment after a designated transmitting signal is started, and acquiring signal frequency of the corresponding moment of the output signal of the corresponding analog segment and the signal frequency of the corresponding moment of the undisturbed output signal, wherein the signal frequency is divided into m equal set time segments according to time;
s42, leading signal frequencies of corresponding analog segment output signals and corresponding moments of non-interference output signals into a signal frequency outlier calculation formula to calculate signal frequency outliers of corresponding analog segments, wherein the signal frequency outlier calculation formula of the i-th corresponding analog segment is as follows:wherein->Signal frequency average value of j-th period of non-interference output signal, +.>A signal frequency average value of a j-th period of the output signal of the i-th corresponding analog period;
the following is a function written in C language for calculating the signal frequency outlier of the i-th corresponding analog segment, which accepts two parameters: one array containing the signal frequency average (Kij) of the undisturbed output signal and the other array containing the signal frequency average (Kij) of the output signal of the ith corresponding analog segment, this function assuming that the input arrays have been arranged in order and contain enough data points to calculate the signal frequency outlier for each analog segment,
#include<stdio.h>
void calculate_frequency_deviation(float* array1, float* array2, int size, float* result) {
float sum_deviation = 0.0;
float sum_kij = 0.0;
float sum_Kij = 0.0;
float m = 0.0;
for(int i = 0; i<size; i++) {
sum_kij += array1[i];
sum_Kij += array2[i];
m++;
}
for(int i = 0; i<size; i++) {
sum_deviation += fabs(array1[i] - array2[i]);
}
*result = (sum_deviation / (sum_kij / m));
}
int main() {
the// is here only for demonstrating the data, you need to replace this with your actual data
float k1[ ] = {1.0, 2.0, 3.0, 4.0, 5.0 };// signal frequency average of non-interfering output signal
float k2[ ] = {1.5, 2.5, 3.5, 4.5 };// signal frequency average of the output signal of the i-th corresponding analog segment
int size=sizeof (k 1)/sizeof (k 1[0 ])// array size
flow=0.0;// ith signal frequency anomaly value for the corresponding analog segment
calculate_frequency_deviation(k1, k2, size,&w);
printf("The frequency deviation of the corresponding simulated segment is: %f\n", w);
return 0;
}
S5, substituting the calculated signal intensity abnormal value, the calculated signal frequency abnormal value and the calculated position of the corresponding analog segment into a signal integral shielding abnormal value calculation strategy to calculate the signal integral shielding abnormal value of the cable connector;
it should be noted that, the specific content of the signal overall mask outlier calculation strategy in S5 includes the following specific steps:
s51, obtaining the signal intensity abnormal value of each corresponding analog segment obtained by calculation, and calculatingSubstituting the obtained signal intensity abnormal value of each corresponding analog segment into a signal overall intensity abnormal value calculation formula to calculate the signal overall intensity abnormal value, wherein the signal overall intensity abnormal value calculation formula is as follows:wherein n is the number of analog segments,the distance from the middle position of the ith corresponding analog segment to the connecting position of the cable connector;
s52, obtaining the calculated signal frequency outliers of each corresponding analog segment, and substituting the calculated signal frequency outliers of each corresponding analog segment into a signal overall frequency outlier calculation formula to calculate the signal overall frequency outlier, wherein the signal overall frequency outlier calculation formula is as follows:；
s53, obtaining the calculated signal overall strength abnormal value and the signal overall frequency abnormal value, and substituting the obtained signal overall strength abnormal value and the obtained signal overall frequency abnormal value into a signal overall shielding abnormal value calculation formula to calculate a signal overall shielding abnormal value, wherein the signal overall shielding abnormal value calculation formula is as follows:wherein->The duty cycle coefficient is the abnormal value of the overall intensity of the signal,for the signal overall frequency outlier duty cycle, +.>；
S6, comparing the calculated signal integral shielding abnormal value of the cable connector with a set signal abnormal threshold value of the cable connector, and if the obtained signal integral shielding abnormal value of the cable connector is greater than or equal toIf the signal abnormal threshold value of the cable connector is smaller than the signal abnormal threshold value of the cable connector, judging that the shielding effectiveness of the cable connector is qualified; the signal abnormality threshold value here,And->The value of the method is as follows: substituting test data of 5000 groups of produced cable connectors into a signal integral shielding abnormal value calculation formula to calculate signal integral shielding abnormal values, then employing an expert to distinguish good products of the cable connectors, substituting distinguishing results and the calculated signal integral shielding abnormal values into fitting software, and outputting optimal signal abnormal threshold values which accord with judging accuracy>And->Is a value of (2);
the method comprises the steps of connecting the connecting ends of two cables by using a cable connector to be tested, inputting a specified emission signal into the input end of the cable under the action of an undisturbed signal, receiving an output signal into the receiving end of the cable, setting the output signal as the undisturbed output signal, placing the interference sources with specified interference frequency and interference intensity according to the central positions of all analog segments, inputting the specified emission signal into the input end of the cable after starting the interference sources, receiving the output signal into the receiving end of the cable, setting the output signal into the output signal of the corresponding analog segment, substituting the signal intensity of the output signal of the corresponding analog segment and the signal intensity of the undisturbed output signal into a signal intensity outlier calculation strategy, calculating the signal frequency outlier of the corresponding analog segment into the signal frequency outlier calculation strategy, substituting the calculated signal intensity outlier of the corresponding analog segment, and the signal shielding outlier of the position of the corresponding analog segment into a calculation strategy of the signal shielding outlier of the cable connector, carrying out the shielding effect of the cable connector, accurately judging the shielding effect of the cable connector and the cable connector based on the set shielding effect of the cable is accurately compared with the shielding effect of the cable.
Example 2
As shown in fig. 2, a shielding effectiveness test system of a cable connector is implemented based on the shielding effectiveness test method of the cable connector, and includes a test module, a test signal acquisition module, a signal strength outlier calculation module, a signal frequency outlier calculation module, a signal integral shielding outlier calculation module, a data comparison module and a control module, wherein the test module is used for connecting connection ends of two cables by the cable connector to be tested, inputting a specified transmitting signal into an input end of the cable under the action of a non-interference signal, receiving an output signal at a receiving end of the cable, setting the output signal as a non-interference output signal, dividing the cable connector into a plurality of analog segments with equal length according to the horizontal length by taking a connection position of the cable connector as a center, after the interference sources are started, inputting the specified transmitting signal into an input end of the cable, receiving the output signal at a receiving end of the cable, setting the output signal at a corresponding analog segment, and substituting the signal strength outlier calculation module into a strategy of the output signal corresponding to the strength value of the signal of the corresponding analog segment;
in this embodiment, the signal frequency outlier calculating module is configured to substitute the signal frequency of the output signal of the corresponding analog segment and the signal frequency of the non-interfering output signal into a signal frequency outlier calculating strategy to calculate a signal frequency outlier of the corresponding analog segment, and the signal integral mask outlier calculating module is configured to substitute the calculated signal intensity outlier of the corresponding analog segment, the signal frequency outlier and the position of the corresponding analog segment into a signal integral mask outlier calculating strategy to calculate a signal integral mask outlier of the cable connector;
in this embodiment, the data comparison module is configured to compare the calculated signal overall shielding outlier of the cable connector with a set signal outlier threshold of the cable connector, and the control module is configured to control operations of the test module, the test signal acquisition module, the signal intensity outlier calculation module, the signal frequency outlier calculation module, the signal overall shielding outlier calculation module, and the data comparison module.
Example 3
Referring to fig. 3, the present embodiment provides an electronic device, including: a processor and a memory, wherein the memory stores a computer program for the processor to call;
the processor executes the shielding effectiveness test method of the cable connector by calling the computer program stored in the memory.
The electronic device may have a relatively large difference due to different configurations or performances, and may include one or more processors (Central Processing Units, CPU) and one or more memories, where at least one computer program is stored in the memories, and the computer program is loaded and executed by the processors to implement a method for testing shielding effectiveness of a cable connector provided in the above method embodiment. The electronic device can also include other components for implementing the functions of the device, for example, the electronic device can also have wired or wireless network interfaces, input-output interfaces, and the like, for inputting and outputting data. The present embodiment is not described herein.
Example 4
The present embodiment proposes a computer-readable storage medium having stored thereon an erasable computer program;
when the computer program runs on the computer equipment, the computer equipment is caused to execute the shielding effectiveness testing method of the cable connector.
For example, the computer readable storage medium can be Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), compact disk Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM), magnetic tape, floppy disk, optical data storage device, etc.
It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.
It should be understood that determining B from a does not mean determining B from a alone, but can also determine B from a and/or other information.
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions in accordance with embodiments of the present invention are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by way of wired or/and wireless networks from one website site, computer, server, or data center to another. Computer readable storage media can be any available media that can be accessed by a computer or data storage devices, such as servers, data centers, etc. that contain one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the partitioning of units is merely one way of partitioning, and there may be additional ways of partitioning in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (7)
1. The shielding effectiveness test method of the cable connector is characterized by comprising the following specific steps of:
s1, connecting ends of two cables by using a cable connector to be tested, inputting a designated transmitting signal into an input end of the cable under the action of a non-interference signal, receiving an output signal at a receiving end of the cable, setting the output signal as the non-interference output signal, and dividing the cable connector into a plurality of analog sections with equal lengths by taking the connecting position of the cable connector as the center;
s2, placing interference sources with specified interference frequencies and interference intensities according to the central positions of the analog segments respectively, inputting specified transmitting signals to the input end of the cable after starting the interference sources, receiving output signals at the receiving end of the cable, and setting the output signals as corresponding analog segment output signals;
s3, substituting the signal intensity of the output signal of the corresponding analog segment and the signal intensity of the interference-free output signal into a signal intensity abnormal value calculation strategy to calculate the signal intensity abnormal value of the corresponding analog segment;
the signal intensity outlier calculation strategy of S3 comprises the following specific steps:
s31, acquiring signal intensity of an output signal of a corresponding analog segment and signal intensity of an undisturbed output signal, correspondingly acquiring signal intensity of a designated transmitting signal at a corresponding moment after starting up, and acquiring signal intensity of the output signal of the corresponding analog segment and the signal intensity of the undisturbed output signal at the corresponding moment;
s32, leading the signal intensity of the corresponding analog segment output signal and the signal intensity of the corresponding moment of the non-interference output signal into a signal intensity abnormal value calculation formula to calculate the signal intensity abnormal value of the corresponding analog segment, wherein the signal intensity abnormal value calculation formula of the i-th corresponding analog segment is as follows:wherein, the time length of the Toutput signal, dt is the time integral, < >>For the signal strength at the i-th corresponding analog segment t time,/>The signal intensity at the moment of outputting the signal t without interference;
s4, substituting the signal frequency of the output signal of the corresponding analog segment and the signal frequency of the interference-free output signal into a signal frequency outlier calculation strategy to calculate the signal frequency outlier of the corresponding analog segment;
s41, acquiring signal intensity of an output signal of a corresponding analog segment and signal frequency of an undisturbed output signal, correspondingly acquiring signal frequency of a corresponding moment after a designated transmitting signal is started, and acquiring signal frequency of the corresponding moment of the output signal of the corresponding analog segment and the signal frequency of the corresponding moment of the undisturbed output signal, wherein the signal frequency is divided into m equal set time segments according to time;
s42, importing signal frequency corresponding to the corresponding time of the analog segment output signal and the interference-free output signal into the signalCalculating the signal frequency outlier of the corresponding analog segment in the number frequency outlier calculation formula, wherein the signal frequency outlier calculation formula of the i-th corresponding analog segment is as follows:wherein->Signal frequency average value of j-th period of non-interference output signal, +.>A signal frequency average value of a j-th period of the output signal of the i-th corresponding analog period;
s5, substituting the calculated signal intensity abnormal value, the calculated signal frequency abnormal value and the calculated position of the corresponding analog segment into a signal integral shielding abnormal value calculation strategy to calculate the signal integral shielding abnormal value of the cable connector;
the specific content of the signal overall shielding abnormal value calculation strategy in the S5 comprises the following specific steps:
s51, obtaining the calculated abnormal value of the signal intensity of each corresponding analog segment, substituting the calculated abnormal value of the signal intensity of each corresponding analog segment into a calculation formula of the abnormal value of the signal overall intensity to calculate the abnormal value of the signal overall intensity, wherein the calculation formula of the abnormal value of the signal overall intensity is as follows:wherein n is the number of analog segments,the distance from the middle position of the ith corresponding analog segment to the connecting position of the cable connector;
s52, obtaining the calculated signal frequency outlier of each corresponding analog segment, substituting the calculated signal frequency outlier of each corresponding analog segment into a signal overall frequency outlier calculation formula to calculate the signal overall frequency outlier, wherein the signal overall frequency outlier is calculated by the signal overall frequency outlier calculation formulaThe frequency outlier calculation formula is:；
s53, obtaining the calculated signal overall strength abnormal value and the signal overall frequency abnormal value, and substituting the obtained signal overall strength abnormal value and the obtained signal overall frequency abnormal value into a signal overall shielding abnormal value calculation formula to calculate a signal overall shielding abnormal value, wherein the signal overall shielding abnormal value calculation formula is as follows:wherein->For the signal overall intensity outlier duty cycle, +.>For the signal overall frequency outlier duty cycle, +.>；
S6, comparing the calculated signal overall shielding abnormal value of the cable connector with a set signal abnormal threshold value of the cable connector, and judging whether the shielding effectiveness of the cable connector is qualified or not.
2. The method for testing shielding effectiveness of a cable connector according to claim 1, wherein S1 comprises the following steps:
s11, connecting the connecting ends of two cables by using cable connectors to be tested, connecting the two ends of the cable connectors with the connecting ends of the two cables respectively, placing the cable connectors connected with the connecting ends of the two cables in a box body with no interference sources around, inputting appointed transmitting signals to the input ends of the cables by a stable signal transmitting source under the action of the interference-free signals, receiving output signal data of the cables at the receiving end of the cables, wherein the output signal data of the cables comprises signal intensity data and signal frequency data of each time point of the cable output signals, and setting the received cable output signals under the action of the interference-free signals as interference-free output signals;
s12, dividing the cable connector into a plurality of simulation segments with equal length according to the horizontal length by taking the connection position of the cable connector as the center.
3. The method for testing shielding effectiveness of a cable connector according to claim 2, wherein S2 comprises the following specific contents:
s21, searching the middle position of the analog section to obtain an interference source with specified interference frequency and interference intensity, respectively placing the interference sources at the middle position of the corresponding analog section in a left-to-right sequence, and starting the interference sources until the interference sources work stably;
s22, after the interference source works stably, a designated transmitting signal is input to the input end of the cable, an output signal is received at the receiving end of the cable, the received output signal is set to be the output signal of the corresponding analog segment, the interference source is placed in the middle of each corresponding analog segment, and the corresponding output signal of each corresponding analog segment is obtained.
4. The shielding effectiveness test system of the cable connector is realized based on the shielding effectiveness test method of the cable connector according to any one of claims 1-3, and is characterized by comprising a test module, a test signal acquisition module, a signal intensity abnormal value calculation module, a signal frequency abnormal value calculation module, a signal integral shielding abnormal value calculation module, a data comparison module and a control module, wherein the test module is used for connecting the connecting ends of two cables by the cable connector to be tested, inputting a specified transmitting signal at the input end of the cable under the action of a non-interference signal, receiving an output signal at the receiving end of the cable, setting the output signal as a non-interference output signal, dividing the cable connector into a plurality of analog segments with equal lengths by taking the connecting position of the cable connector as the center, respectively placing interference sources of specified interference frequencies and interference intensities according to the center positions of the analog segments, inputting specified transmitting signals to the input end of the cable after opening the interference sources, setting the output signal at the receiving end of the cable to be corresponding analog segment output signal, and setting the output signal corresponding to the calculated signal abnormal signal intensity value corresponding to the non-interference signal strategy value calculation signal corresponding to the abnormal signal intensity value of the analog signal output signal strategy.
5. The shielding effectiveness test system of a cable connector according to claim 4, wherein the signal frequency outlier calculating module is configured to substitute the signal frequency of the output signal of the corresponding analog segment and the signal frequency of the non-interference output signal into a signal frequency outlier calculating strategy to calculate the signal frequency outlier of the corresponding analog segment, the signal integral shielding outlier calculating module is configured to substitute the calculated signal intensity outlier of the corresponding analog segment, the signal frequency outlier and the position of the corresponding analog segment into the signal integral shielding outlier calculating strategy to calculate the signal integral shielding outlier of the cable connector, and the data comparing module is configured to compare the calculated signal integral shielding outlier of the cable connector with a set signal outlier threshold of the cable connector, and the control module is configured to control operations of the test module, the test signal acquisition module, the signal intensity outlier calculating module, the signal frequency outlier calculating module, the signal integral shielding outlier calculating module and the data comparing module.
6. An electronic device, comprising: a processor and a memory, wherein the memory stores a computer program for the processor to call; a shielding effectiveness test method of a cable connector according to any one of claims 1-3, wherein the processor executes a program stored in the memory.
7. A computer readable storage medium storing instructions which, when run on a computer, cause the computer to perform a shielding effectiveness testing method of a cable connector according to any one of claims 1-3.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116126A (en) * | 2018-09-06 | 2019-01-01 | 山东康威通信技术股份有限公司 | A kind of communication cable shielding layer shield effectiveness on-line monitoring appraisal procedure and system |
| WO2021027335A1 (en) * | 2019-08-15 | 2021-02-18 | 浙江三维通信科技有限公司 | Signal shielding testing method and system |
| CN114755500A (en) * | 2022-04-07 | 2022-07-15 | 苏州信科检测技术有限公司 | Connector shielding effectiveness testing device and method |
| CN218240424U (en) * | 2022-06-29 | 2023-01-06 | 深圳百讴声学技术有限公司 | Anti-interference testing device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116126A (en) * | 2018-09-06 | 2019-01-01 | 山东康威通信技术股份有限公司 | A kind of communication cable shielding layer shield effectiveness on-line monitoring appraisal procedure and system |
| WO2021027335A1 (en) * | 2019-08-15 | 2021-02-18 | 浙江三维通信科技有限公司 | Signal shielding testing method and system |
| CN114755500A (en) * | 2022-04-07 | 2022-07-15 | 苏州信科检测技术有限公司 | Connector shielding effectiveness testing device and method |
| CN218240424U (en) * | 2022-06-29 | 2023-01-06 | 深圳百讴声学技术有限公司 | Anti-interference testing device |
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