CN113376560A - Cable automatic calibration and compensation method of comprehensive detection equipment - Google Patents
Cable automatic calibration and compensation method of comprehensive detection equipment Download PDFInfo
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- CN113376560A CN113376560A CN202110611782.2A CN202110611782A CN113376560A CN 113376560 A CN113376560 A CN 113376560A CN 202110611782 A CN202110611782 A CN 202110611782A CN 113376560 A CN113376560 A CN 113376560A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention relates to a cable automatic calibration and automatic compensation method of comprehensive detection equipment, which adopts an operation terminal, the comprehensive detection equipment, a power meter, a signal generator and a switch to automatically calibrate and compensate cables; firstly, obtaining power calibration data of a signal generator, then connecting one end of a cable to an output port of the signal generator, and connecting the other end of the cable with a power meter; setting parameters to be calibrated of the cable in the automatic cable calibration function of the operation terminal, selecting measured power calibration data of the signal generator, starting automatic cable calibration, and automatically generating power compensation values of all frequency points after the cable is calibrated. The invention can automatically calibrate the user-defined frequency band of any kind of cables, store the corresponding cable compensation file, and support the real-time loading of other cable data and the modification of the cable compensation data.
Description
Technical Field
The invention belongs to the technical field of cable calibration and compensation, and particularly relates to a cable automatic calibration and compensation method of comprehensive detection equipment.
Background
The comprehensive detection equipment is suitable for testing and overhauling of an outfield radar and a radio station, and is suitable for the fields of development, production, maintenance, detection and the like of electronic equipment. In the actual test process, the comprehensive detection device needs to be connected with the device to be tested, wherein the compensation data precision of the connecting cable plays an important role in the final test result precision, so that how to quickly calibrate the cable and obtain more accurate cable compensation data is particularly critical. The existing comprehensive detection equipment measures the single-point compensation value of the cable according to the test single frequency point, and then compensates the power value of the cable, although the precision of the cable compensation data of the single frequency point is higher, when facing a plurality of test items or replacing the connecting cable, the method exposes the problems of larger workload, poorer flexibility, low test efficiency and the like.
Disclosure of Invention
In order to solve the problems, the invention provides a cable automatic calibration and compensation method of comprehensive detection equipment, which solves the problem that the comprehensive detection equipment rapidly calibrates and compensates different cables in multiple frequency bands in the process of testing an external field.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cable automatic calibration and automatic compensation method of comprehensive detection equipment adopts an operation terminal, the comprehensive detection equipment, a power meter, a signal generator and a switch to automatically calibrate and compensate the cable; the operation terminal is connected with the comprehensive detection equipment, the power meter and the signal generator through the switch;
comprises the following steps:
s1, connecting the probe of the power meter with the output port of a signal generator, wherein the signal generator selects a signal generator with a 20MHz-18GHz frequency band built in the comprehensive detection equipment or any external signal generator to obtain power calibration data of the signal generator;
s2, connecting one end of the cable to the output port of the signal generator, and connecting the other end of the cable with the power meter;
s3, setting the starting frequency, the ending frequency, the stepping frequency and the cable name of the cable to be calibrated in the automatic cable calibration function of the operation terminal;
s4, selecting the measured power calibration data of the signal generator, and starting the automatic calibration work of the cable;
s5, when the cable is calibrated, automatically generating power compensation values of each frequency point, and writing the power compensation values into a cable compensation file with a file format of csv;
furthermore, the method also supports the functions of checking the compensation data of the cable and modifying the cable compensation data of the cable in real time, when the comprehensive detection equipment is used for testing other equipment to be tested, the cable compensation file is imported, and the optimal cable power compensation value is calculated and compensated by using an inter-cell linear interpolation method according to the frequency point to be tested.
Further, according to the inter-cell linear interpolation method, a power compensation value formula is obtained:
wherein, P is the power compensation value, F is the frequency value of the current frequency point, FiIs the frequency value of the previous frequency point, PiIs the power value corresponding to the previous frequency point, Fi+1Is the frequency value of the latter frequency point, Pi+1And the power value is the power value corresponding to the next frequency point.
Furthermore, a software running platform and a debugging platform of the operation terminal are Windows7 operation systems, a development tool is Qt5.12.10, a development language is C + +, and interface design is based on Qt Creator 4.13.1.
Further, the operation terminal communicates with the comprehensive detection device, the power meter and the signal generator through a TCP/IP interface.
Further, SCPI program control commands of different types of power meters and signal generators are packaged into an instrument driver library, and corresponding equipment library files are dynamically loaded during cable calibration.
The invention has the following beneficial technical effects:
(1) aiming at different test frequency points and different connecting cables, the method supports testers to set calibration frequency bands and step frequencies of different cables in a user-defined mode, and stores the calibration frequency bands and step frequencies as corresponding cable compensation data, so that the workload of measurement is remarkably reduced, and the test efficiency is improved. And after the calibration is finished, the calibration data of the signal source can be stored, and the subsequent cable calibration steps are reduced.
(2) The built-in signal generation module of the comprehensive detection equipment can directly adopt a built-in signal source of the equipment to calibrate the cable, and can also support any external signal source to calibrate the cable, so that the comprehensive detection equipment enables the external field test to be more convenient, and the test equipment is lighter.
(3) The method supports real-time loading and modification of cable compensation data of any frequency point, and in the test process, a compensation value is automatically calculated from a compensation file according to the test frequency point by adopting a method of linear interpolation between cells, so that the compensation precision is ensured, and the workload is effectively reduced.
Drawings
FIG. 1 is a block diagram of the automatic calibration and compensation of the cable according to the present invention;
FIG. 2 is a schematic diagram of the automatic calibration and compensation of the cable according to the present invention;
FIG. 3 is a schematic diagram of a linear interpolation method according to the present invention;
Detailed Description
To facilitate understanding and practice of the invention by those of ordinary skill in the art, embodiments of the invention are further described below with reference to the accompanying drawings and specific examples:
as shown in fig. 1-2, a cable automatic calibration and compensation method for integrated detection equipment, which adopts an operation terminal, integrated detection equipment, a power meter, a signal generator and a switch to automatically calibrate and compensate a cable; the operation terminal is connected with the comprehensive detection equipment, the power meter and the signal generator through the switch;
comprises the following steps:
s1, connecting the probe of the power meter with the output port of a signal generator, wherein the signal generator selects a signal generator with a 20MHz-18GHz frequency band built in the comprehensive detection equipment or any external signal generator to obtain power calibration data of the signal generator;
s2, connecting one end of the cable to the output port of the signal generator, and connecting the other end of the cable with the power meter;
s3, setting the starting frequency, the ending frequency, the stepping frequency and the cable name of the cable to be calibrated in the automatic cable calibration function of the operation terminal;
s4, selecting the measured power calibration data of the signal generator, and starting the automatic calibration work of the cable;
s5, when the cable is calibrated, automatically generating power compensation values of each frequency point, and writing the power compensation values into a cable compensation file with a file format of csv;
specifically, the method also supports the functions of checking the compensation data of the cable and modifying the cable compensation data of the cable in real time, when the comprehensive detection equipment is used for testing other equipment to be tested, the cable compensation file is imported, and the optimal cable power compensation value is calculated and compensated by using an inter-cell linear interpolation method according to the frequency point to be tested.
Specifically, as shown in fig. 3, according to the inter-cell linear interpolation method, a power compensation value formula is obtained:
specifically, the software running platform and the debugging platform of the operation terminal are Windows7 operating systems, the development tool is Qt5.12.10, the development language is C + +, and the interface design is based on Qt Creator 4.13.1.
Specifically, the operation terminal communicates with the comprehensive detection device, the power meter and the signal generator through a TCP/IP interface.
Specifically, SCPI program control commands of different types of power meters and signal generators are packaged into an instrument driver library, and corresponding equipment library files are dynamically loaded during cable calibration.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (6)
1. A cable automatic calibration and automatic compensation method of comprehensive detection equipment is characterized in that an operation terminal, the comprehensive detection equipment, a power meter, a signal generator and a switch are adopted to automatically calibrate and compensate cables; the operation terminal is connected with the comprehensive detection equipment, the power meter and the signal generator through the switch;
comprises the following steps:
s1, connecting the probe of the power meter with the output port of a signal generator, wherein the signal generator selects a built-in signal generator of the comprehensive detection equipment or any external signal generator to obtain power calibration data of the signal generator;
s2, connecting one end of the cable to the output port of the signal generator, and connecting the other end of the cable with the power meter;
s3, setting the starting frequency, the ending frequency, the stepping frequency and the cable name of the cable to be calibrated in the automatic cable calibration function of the operation terminal;
s4, selecting the measured power calibration data of the signal generator, and starting the automatic calibration work of the cable;
and S5, automatically generating power compensation values of each frequency point after the cable is calibrated, and writing the power compensation values into a cable compensation file with a file format of csv.
2. The method for automatic cable calibration and compensation of integrated test equipment according to claim 1, wherein when the integrated test equipment is used to test other devices to be tested, a cable compensation file is imported, and according to the frequency points to be tested, an optimal cable power compensation value is calculated and compensated by using an inter-cell linear interpolation method.
3. The method for automatic cable calibration and compensation of integrated detection equipment according to claim 2, wherein a power compensation value formula is derived according to the method of linear interpolation between cells:
wherein, P is the power compensation value, F is the frequency value of the current frequency point, FiIs the frequency value of the previous frequency point, PiIs the power value corresponding to the previous frequency point, Fi+1Is the frequency value of the latter frequency point, Pi+1And the power value is the power value corresponding to the next frequency point.
4. The method for automatically calibrating and compensating the cable of the comprehensive detection device according to claim 1, wherein the software running platform and the debugging platform of the operation terminal are Windows7 operating system, the development tool is qt5.12.10, the development language is C + +, and the interface design is based on Qt Creator 4.13.1.
5. The method for cable auto-calibration and auto-compensation of integrated test equipment according to claim 1, wherein the operation terminal communicates with the integrated test equipment, the power meter and the signal generator through a TCP/IP interface.
6. The method for cable automatic calibration and compensation of integrated test equipment as claimed in claim 1, wherein the SCPI program control commands of different kinds of power meters and signal generators are packaged as instrument driver library, and the corresponding equipment library file is dynamically loaded during cable calibration.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105301377A (en) * | 2014-06-19 | 2016-02-03 | 联想移动通信科技有限公司 | Method, apparatus and system for measuring RF line loss |
| CN107483128A (en) * | 2016-06-08 | 2017-12-15 | 中兴通讯股份有限公司 | RRU and its online ACLR self diagnosis a kind of method |
| CN107888232A (en) * | 2017-11-21 | 2018-04-06 | 广东欧珀移动通信有限公司 | Detect the method and test system, host computer, computer-readable recording medium of line loss |
| CN112816787A (en) * | 2020-12-29 | 2021-05-18 | 广东湾区智能终端工业设计研究院有限公司 | Line loss point inspection system and method |
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- 2021-06-02 CN CN202110611782.2A patent/CN113376560A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301377A (en) * | 2014-06-19 | 2016-02-03 | 联想移动通信科技有限公司 | Method, apparatus and system for measuring RF line loss |
| CN107483128A (en) * | 2016-06-08 | 2017-12-15 | 中兴通讯股份有限公司 | RRU and its online ACLR self diagnosis a kind of method |
| CN107888232A (en) * | 2017-11-21 | 2018-04-06 | 广东欧珀移动通信有限公司 | Detect the method and test system, host computer, computer-readable recording medium of line loss |
| CN112816787A (en) * | 2020-12-29 | 2021-05-18 | 广东湾区智能终端工业设计研究院有限公司 | Line loss point inspection system and method |
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