CN104502875A - Signal detection equipment calibrating method based on time-frequency parameter standard signal source manner - Google Patents
Signal detection equipment calibrating method based on time-frequency parameter standard signal source manner Download PDFInfo
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Abstract
The invention relates to a signal detection equipment calibrating method based on a time-frequency parameter standard signal source manner. According to the signal detection equipment calibrating method disclosed by the invention, a standard signal source can be remotely controlled, the output information such as the time-frequency parameters of the standard signal source is collected, and comparative analysis is carried out on standard data and the output data of equipment to be detected, so that the data accuracy grade and operation suggestions of the equipment to be detected are given out. The signal detection equipment calibrating method disclosed by the invention can reuse a test plan, and particularly during the parameter setting in the aspects of equipment, instruments, signal sources, data collection, results and the like, the workload can be greatly saved through the reusing of the plan; meanwhile, the plan can be separated with a site test, the plan is prepared before the site test, and thus the site test time is shortened, and the using convenience of the calibrating method is improved.
Description
Technical field
The present invention relates to equipment Alignment field, particularly a kind of signal detection apparatus calibration steps based on time and frequency parameter standard signal source mode.
Background technology
Signal monitoring device measuring data accuracy directly has influence on the quality of product, in order to ensure the accurate reliability of equipment, when Project R&D and payment user use, must calibrate it.Existing signal calibration mode comprises calibrates and spatial domain parametric calibration the time and frequency parameter of signal, and no matter prior art is that time domain parameter is calibrated or parametric calibration aspect, spatial domain all exists many problems, such as relate to equipment numerous, operating process is wasted time and energy, calibration process is numerous and diverse, running time is long, and the easy fatigue of operating personnel is made mistakes etc., therefore needs to adopt new calibration steps to calibrate signal detection apparatus.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of signal detection apparatus calibration steps based on time and frequency parameter standard signal source mode, solve that existing calibration steps alignment process is complicated, the running time is long, operating personnel's easily fatigue and technical matters wasted time and energy.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of signal detection apparatus calibration steps based on time and frequency parameter standard signal source mode, comprises the following steps:
Step 1, sets up signal detection apparatus calibration plan, and described signal detection apparatus calibration plan comprises facility information, the calibration essential information and signal testing flow process of equipment to be detected;
Step 2, newly-built test signal pattern, and the time and frequency parameter setting value changing test signal according to described signal testing flow process, generate standard measuring signal pattern;
Step 3, according to signal detection apparatus calibration plan, test system building, and completion system self-inspection; Described test macro comprises standard signal source and signal detection apparatus to be measured; In this step, test macro can also comprise standard instrument, and described standard instrument comprises: oscillograph, frequency spectrograph and/or Vector Signal Analysis device; The time and frequency parameter of the standard measuring signal collected for gathering the time and frequency parameter of standard measuring signal, and is regarded as the time and frequency parameter setting value of standard measuring signal by described standard detection instrument, when needs carry out complicated comparison, produces complicated figure.In this step, System self-test is judge can whether system correctly can receive signal, carry out Long-distance Control etc.The present invention adopts the mode of system closed loop self-inspection, dock respectively with signal detection apparatus to be detected, standard instrument by standard signal source, whether examination criteria testing tool can read correct reading, and can standard signal source send test massage through Long-distance Control, signal detection apparatus to be detected can receive test signal.Only has the system through self-inspection, the correctness of guarantee signal detection apparatus calibration steps of the present invention and authority.
Step 4, described standard signal source sends test signal to signal detection apparatus to be detected according to described standard measuring signal pattern;
Step 5, described signal detection apparatus to be detected receives described test signal, and outputs test data, the time and frequency parameter detected value of the test signal received described in described test data comprises;
Step 6, stores the time and frequency parameter detected value of described test signal, and described time and frequency parameter detected value and described time and frequency parameter setting value are compared analysis, generates the error information chart of described measured signal checkout equipment, accuracy class and/or suggestion for operation.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described calibration essential information comprises calibration plan title, calibrates the execution time and/or be calibrated device name.
Further, described facility information comprises the unit type of equipment to be detected, sequence number, affiliated unit, place, test assignment background, equipment position latitude and longitude information, positive northern information, device performance parameters and/or test site humiture; Described equipment to be detected comprises uphole equipment and air equipment.
Further, described time and frequency parameter comprise the frequency of operation of test signal, pulse width, pulse recurrence interval, pulse amplitude, oscillogram, spectrogram, time-frequency figure and/or time phasor.
Further, described step 2 is specially: arrange test signal pattern group, and each test signal pattern of described test signal pattern group comprises different time and frequency parameters; Each test signal pattern of test signal pattern group is combined, generates standard measuring signal.
Further, described step 2 is specially:
101 set up test signal pattern database, and described test signal pattern database comprises multiple test signal pattern group and multiple test signal pattern;
102 select a test signal pattern from described test signal pattern database, and determine the release time of selected test signal pattern;
103 repeat step 102, and according to signal flow, are combined by the multiple test signal patterns selected, adjust order and/or the release time of described multiple test signal pattern; Described signal flow according between first frequency, again pulsewidth, arteries and veins, modulation, amplitude modulation order, numerically travel through from low to high, often traveling through is once a frame period;
104 set up instrument performance parameter database, judge that the time and frequency parameter of described multiple test signal pattern is whether all in the performance parameter boundary of equipment to be detected, namely judge whether described multiple test signal pattern is effective test signal pattern, if so, then enters step 105; If not, then return step 102; Carry out this step, be to provide a border to the setting parameter of test signal, preventing signal parameter from arranging excessive, thus damage instrument cannot obtain legitimate reading.
105 generate and preserve standard measuring signal.
Further, in described step 103, adopt multiple test signal pattern identical with step 102 to combine, namely repeatedly repeat the test signal pattern selected in step 102; Or select multiple different test signal pattern to combine, each test signal pattern repeatedly repeats.
Further, described test data also comprise the graph data of the standard measuring signal that described equipment to be detected receives, described test data deposit position, data capacity size restriction and/or deposit data mode; Described test data adopts XML file to carry out classification and stores.
Further, Select Error model, compares to analyze to described time and frequency parameter detected value and described time and frequency parameter setting value and generates error analysis data, and adopts form and/or curve to show described error analysis data, generates suggestion and measure document; Described error model comprises list data model and/or Graphical Data Model;
Treat the test data that checkout equipment exports and carry out precision threshold sets, generate and show the accuracy class of described measured signal checkout equipment; Described precision threshold sets comprises time-frequency data precision thresholding and/or time-frequency pattern precision thresholding, and described time-frequency data precision thresholding comprises frequency of operation error threshold, pulse width error thresholding, recurrent interval error threshold and/or pulse height error threshold; Described time-frequency pattern precision thresholding comprise oscillogram error threshold, spectrogram error threshold, time-frequency figure error threshold and/or time phasor error threshold.
Further, described signal detection apparatus calibration plan, described test signal pattern, described signal testing flow process and time and frequency parameter detected value all adopt structure to encode; Described oscillogram, spectrogram, time-frequency figure and/or time phasor be txt form; Described error analysis data are exce l form.
The invention has the beneficial effects as follows: signal detection apparatus calibration steps of the present invention can multiplexing test plan, when relating in particular to the optimum configurations of the many aspects such as equipment, instrument, signal source, data acquisition, result, multiplexing plan can well save workload; Plan, on-the-spot test can be separated, the plan of drawing up before test at the scene simultaneously, thus save the on-the-spot test time, improve the convenience that calibration steps uses.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of signal detection apparatus calibration steps of the present invention.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Fig. 1 is the process flow diagram of signal detection apparatus calibration steps of the present invention, as shown in Figure 1, comprises the following steps:
Step 1, sets up signal detection apparatus calibration plan, and described signal detection apparatus calibration plan comprises facility information, the calibration essential information and signal testing flow process of equipment to be detected;
Step 2, newly-built test signal pattern, and the time and frequency parameter setting value changing test signal according to described signal testing flow process, generate standard measuring signal pattern;
Step 3, according to signal detection apparatus calibration plan, test system building, and completion system self-inspection; Described test macro comprises standard signal source and signal detection apparatus to be measured;
Step 4, described standard signal source sends test signal to signal detection apparatus to be detected according to described standard measuring signal pattern;
Step 5, described signal detection apparatus to be detected receives described test signal, and outputs test data, the time and frequency parameter detected value of the test signal received described in described test data comprises; In other embodiments, described test data also comprise the graph data of the standard measuring signal that described equipment to be detected receives, described test data deposit position, data capacity size restriction and/or deposit data mode; Described test data adopts XML file to carry out classification and stores.
Step 6, stores the time and frequency parameter detected value of described test signal, and described time and frequency parameter detected value and described time and frequency parameter setting value are compared analysis, generates the error information chart of described measured signal checkout equipment, accuracy class and/or suggestion for operation.In the present embodiment, testing time is more than three times, to ensure the accuracy of test result.
In embodiments of the invention, described calibration essential information comprises calibration plan title, calibrates the execution time and/or be calibrated device name.Described facility information comprises the unit type of equipment to be detected, sequence number, affiliated unit, place, test assignment background, equipment position latitude and longitude information, positive northern information, device performance parameters and/or test site humiture; Described equipment to be detected comprises uphole equipment and air equipment.Described time and frequency parameter comprise the frequency of operation of test signal, pulse width, pulse recurrence interval, pulse amplitude, oscillogram, spectrogram, time-frequency figure and/or time phasor.
In the present embodiment, described step 2 is specially: arrange test signal pattern group, and each test signal pattern of described test signal pattern group comprises different time and frequency parameters; Each test signal pattern of test signal pattern group is combined, generates standard measuring signal.More concrete is expressed as follows:
101 set up test signal pattern database, and described test signal pattern database comprises multiple test signal pattern group and multiple test signal pattern;
102 select a test signal pattern from described test signal pattern database, and determine the release time of selected test signal pattern;
103 repeat step 102, and according to signal flow, are combined by the multiple test signal patterns selected, adjust order and/or the release time of described multiple test signal pattern; Described signal flow according between first frequency, again pulsewidth, arteries and veins, modulation, amplitude modulation order, numerically travel through from low to high, often traveling through is once a frame period; In this step, multiple test signal pattern identical with step 102 can be adopted to combine, namely repeatedly repeat the test signal pattern selected in step 102; Or select multiple different test signal pattern to combine, each test signal pattern repeatedly repeats.
104 set up instrument performance parameter database, judge that the time and frequency parameter of described multiple test signal pattern is whether all in the performance parameter boundary of equipment to be detected, namely judge whether described multiple test signal pattern is effective test signal pattern, if so, then enters step 105; If not, then return step 102;
105 generate and preserve standard measuring signal.
In the present embodiment, described step 6 is specially:
Select Error model, compares to analyze to described time and frequency parameter detected value and described time and frequency parameter setting value and generates error analysis data, and adopts form and/or curve to show described error analysis data, generates suggestion and measure document; Described error model comprises list data model and/or Graphical Data Model;
Treat the test data that checkout equipment exports and carry out precision threshold sets, generate and show the accuracy class of described measured signal checkout equipment; Described precision threshold sets comprises time-frequency data precision thresholding and/or time-frequency pattern precision thresholding, and described time-frequency data precision thresholding comprises frequency of operation error threshold, pulse width error thresholding, recurrent interval error threshold and/or pulse height error threshold; Described time-frequency pattern precision thresholding comprise oscillogram error threshold, spectrogram error threshold, time-frequency figure error threshold and/or time phasor error threshold.
In the present embodiment, described signal detection apparatus calibration plan, described test signal pattern, described signal testing flow process and time and frequency parameter detected value all adopt structure to encode; Described oscillogram, spectrogram, time-frequency figure and/or time phasor be txt form; Described error analysis data are exce l form.
Signal detection apparatus calibration steps of the present invention can multiplexing test plan, and when relating in particular to the optimum configurations of the many aspects such as equipment, instrument, signal source, data acquisition, result, multiplexing plan can well save workload; Plan, on-the-spot test can be separated, the plan of drawing up before test at the scene simultaneously, thus save the on-the-spot test time, improve the convenience that calibration steps uses.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1., based on a signal detection apparatus calibration steps for time and frequency parameter standard signal source mode, comprise the following steps:
Step 1, sets up signal detection apparatus calibration plan, and described signal detection apparatus calibration plan comprises facility information, the calibration essential information and signal testing flow process of equipment to be detected;
Step 2, newly-built test signal pattern, and the time and frequency parameter setting value changing test signal according to described signal testing flow process, generate standard measuring signal pattern;
Step 3, according to signal detection apparatus calibration plan, test system building, and completion system self-inspection; Described test macro comprises standard signal source and signal detection apparatus to be measured;
Step 4, described standard signal source sends test signal to signal detection apparatus to be detected according to described standard measuring signal pattern;
Step 5, described signal detection apparatus to be detected receives described test signal, and outputs test data, the time and frequency parameter detected value of the test signal received described in described test data comprises;
Step 6, stores the time and frequency parameter detected value of described test signal, and described time and frequency parameter detected value and described time and frequency parameter setting value are compared analysis, generates the error information chart of described measured signal checkout equipment, accuracy class and/or suggestion for operation.
2. calibration steps according to claim 1, is characterized in that, described calibration essential information comprises calibration plan title, calibrates the execution time and/or be calibrated device name.
3. calibration steps according to claim 1, it is characterized in that, described facility information comprises the unit type of equipment to be detected, sequence number, affiliated unit, place, test assignment background, equipment position latitude and longitude information, positive northern information, device performance parameters and/or test site humiture; Described equipment to be detected comprises uphole equipment and air equipment.
4. calibration steps according to claim 1, is characterized in that, described time and frequency parameter comprise the frequency of operation of test signal, pulse width, pulse recurrence interval, pulse amplitude, oscillogram, spectrogram, time-frequency figure and/or time phasor.
5., according to the arbitrary described calibration steps of Claims 1 to 4, it is characterized in that, described step 2 is specially: arrange test signal pattern group, and each test signal pattern of described test signal pattern group comprises different time and frequency parameters; Each test signal pattern of test signal pattern group is combined, generates standard measuring signal.
6. calibration steps according to claim 5, is characterized in that, described step 2 is specially:
101 set up test signal pattern database, and described test signal pattern database comprises multiple test signal pattern group and multiple test signal pattern;
102 select a test signal pattern from described test signal pattern database, and determine the release time of selected test signal pattern;
103 repeat step 102, and according to signal flow, are combined by the multiple test signal patterns selected, adjust order and/or the release time of described multiple test signal pattern; Described signal flow according between first frequency, again pulsewidth, arteries and veins, modulation, amplitude modulation order, numerically travel through from low to high, often traveling through is once a frame period;
104 set up instrument performance parameter database, judge that the time and frequency parameter of described multiple test signal pattern is whether all in the performance parameter boundary of equipment to be detected, namely judge whether described multiple test signal pattern is effective test signal pattern, if so, then enters step 105; If not, then return step 102;
105 generate and preserve standard measuring signal.
7. calibration steps according to claim 6, is characterized in that, in described step 103, adopts multiple test signal pattern identical with step 102 to combine, and namely repeatedly repeats the test signal pattern selected in step 102; Or select multiple different test signal pattern to combine, each test signal pattern repeatedly repeats.
8. calibration steps according to claim 5, it is characterized in that, in described step 5: described test data also comprise the graph data of the standard measuring signal that described equipment to be detected receives, described test data deposit position, data capacity size restriction and/or deposit data mode; Described test data adopts XML file to carry out classification and stores.
9. calibration steps according to claim 5, is characterized in that, described step 6 is specially:
Select Error model, compares to analyze to described time and frequency parameter detected value and described time and frequency parameter setting value and generates error analysis data, and adopts form and/or curve to show described error analysis data, generates suggestion and measure document; Described error model comprises list data model and/or Graphical Data Model;
Treat the test data that checkout equipment exports and carry out precision threshold sets, generate and show the accuracy class of described measured signal checkout equipment; Described precision threshold sets comprises time-frequency data precision thresholding and/or time-frequency pattern precision thresholding, and described time-frequency data precision thresholding comprises frequency of operation error threshold, pulse width error thresholding, recurrent interval error threshold and/or pulse height error threshold; Described time-frequency pattern precision thresholding comprise oscillogram error threshold, spectrogram error threshold, time-frequency figure error threshold and/or time phasor error threshold.
10. calibration steps according to claim 9, is characterized in that, described signal detection apparatus calibration plan, described test signal pattern, described signal testing flow process and time and frequency parameter detected value all adopt structure to encode; Described oscillogram, spectrogram, time-frequency figure and/or time phasor be txt form; Described error analysis data are excel form.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108614228A (en) * | 2018-05-23 | 2018-10-02 | 中国电子科技集团公司第四十研究所 | Test device, system and the equipment of module occur for broadband multiple spot reference signal |
| CN109412901A (en) * | 2018-12-07 | 2019-03-01 | 成都博宇利华科技有限公司 | Acquisition data continuity detection method and detection system based on Time Domain Processing |
| CN112577540A (en) * | 2019-09-27 | 2021-03-30 | 广州中测检测技术有限公司 | Method for remote quantity transmission/tracing by using measuring instrument |
| CN113534033A (en) * | 2020-04-21 | 2021-10-22 | 圣邦微电子（北京）股份有限公司 | Calibration method and calibration system of test machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5625283A (en) * | 1995-08-25 | 1997-04-29 | Sony Corporation | Method and apparatus for calibrating an arc counter |
| US20010005131A1 (en) * | 1999-12-14 | 2001-06-28 | Fluke Precision Measurement Ltd | Fast edge generator with wide dynamic range |
| CN101021555A (en) * | 2007-03-13 | 2007-08-22 | 熊猫电子集团有限公司 | Frequency marker calibrating system based on GPS frequency standard source |
| CN102866375A (en) * | 2012-09-07 | 2013-01-09 | 广东电网公司电力科学研究院 | System and method for calibrating receiving performance of partial-discharge ultrahigh frequency detection device |
| CN103217658A (en) * | 2013-03-22 | 2013-07-24 | 华北电力大学 | Calibration evaluating system and method of partial discharge ultrahigh-frequency detecting device based on GTEM |
| CN103837852A (en) * | 2013-09-23 | 2014-06-04 | 国家电网公司 | All-fiber electronic current transformer frequency characteristic testing device and testing method |
-
2014
- 2014-12-05 CN CN201410738143.2A patent/CN104502875B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5625283A (en) * | 1995-08-25 | 1997-04-29 | Sony Corporation | Method and apparatus for calibrating an arc counter |
| US20010005131A1 (en) * | 1999-12-14 | 2001-06-28 | Fluke Precision Measurement Ltd | Fast edge generator with wide dynamic range |
| CN101021555A (en) * | 2007-03-13 | 2007-08-22 | 熊猫电子集团有限公司 | Frequency marker calibrating system based on GPS frequency standard source |
| CN102866375A (en) * | 2012-09-07 | 2013-01-09 | 广东电网公司电力科学研究院 | System and method for calibrating receiving performance of partial-discharge ultrahigh frequency detection device |
| CN103217658A (en) * | 2013-03-22 | 2013-07-24 | 华北电力大学 | Calibration evaluating system and method of partial discharge ultrahigh-frequency detecting device based on GTEM |
| CN103837852A (en) * | 2013-09-23 | 2014-06-04 | 国家电网公司 | All-fiber electronic current transformer frequency characteristic testing device and testing method |
Non-Patent Citations (2)
| Title |
|---|
| 严宜强: "专用测试设备校准方法", 《计测技术》 * |
| 于火根等: "专用电子测试设备系统校准方法研究", 《航空计测技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108614228A (en) * | 2018-05-23 | 2018-10-02 | 中国电子科技集团公司第四十研究所 | Test device, system and the equipment of module occur for broadband multiple spot reference signal |
| CN109412901A (en) * | 2018-12-07 | 2019-03-01 | 成都博宇利华科技有限公司 | Acquisition data continuity detection method and detection system based on Time Domain Processing |
| CN112577540A (en) * | 2019-09-27 | 2021-03-30 | 广州中测检测技术有限公司 | Method for remote quantity transmission/tracing by using measuring instrument |
| CN113534033A (en) * | 2020-04-21 | 2021-10-22 | 圣邦微电子（北京）股份有限公司 | Calibration method and calibration system of test machine |
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