CN110736877B - High-speed acquisition method and device for time domain reflection signals - Google Patents
High-speed acquisition method and device for time domain reflection signals Download PDFInfo
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- CN110736877B CN110736877B CN201910916255.5A CN201910916255A CN110736877B CN 110736877 B CN110736877 B CN 110736877B CN 201910916255 A CN201910916255 A CN 201910916255A CN 110736877 B CN110736877 B CN 110736877B
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Abstract
The application discloses a high-speed acquisition method and device of time domain reflection signals, which are used for solving the problems of high cost and complex control of the existing acquisition method. The method comprises the steps of determining the acquisition times of a data acquisition unit and the starting time of each acquisition according to a target acquisition frequency and a current acquisition frequency; acquiring data according to the determined acquisition times and starting time to obtain an acquisition result; and determining a total acquisition result under the target acquisition frequency according to the acquisition result of each acquisition. By the acquisition method, a low-frequency data acquisition device can be used for replacing a high-frequency data acquisition device, and the data acquisition cost is reduced.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a high-speed acquisition method and apparatus for a time-domain reflection signal.
Background
Time-Domain Reflectometry (TDR) is commonly used for measuring the characteristic impedance of a transmission line, and for positioning the position of a breakpoint, a short-circuit point, and the like of the transmission line, and is widely applied in the fields of radar, cable obstacle test, optical cable obstacle test, and the like.
In the application process of the time domain reflection technology, after a signal source transmits a signal, the signal can generate signal reflection, namely a time domain reflection signal, due to the change of the characteristic impedance of a transmission line in the transmission process of the transmission line. Therefore, by collecting the time domain reflected signals, the characteristic impedance of the transmission line can be calculated.
At present, when a data acquisition unit acquires a time domain reflection signal, the acquisition frequency of the data acquisition unit generally needs to reach 100MHz or even higher, while the cost of the existing data acquisition unit capable of reaching 100MHz is higher, and the control requirement is also higher.
Disclosure of Invention
The embodiment of the application provides a high-speed acquisition method and device of a time domain reflection signal, which are used for solving the problems of high cost and complex control of the existing acquisition method.
The high-speed acquisition method of the time domain reflection signal provided by the embodiment of the application comprises the following steps:
determining the acquisition times of the data acquisition unit and the starting time of each acquisition according to the target acquisition frequency and the current acquisition frequency; the target acquisition frequency is the acquisition frequency required for acquiring the time domain reflection signal, the current acquisition frequency is the acquisition frequency of a data acquisition device for acquiring the time domain reflection signal currently, and the difference value between the target acquisition frequency and the current acquisition frequency is greater than a preset threshold value;
acquiring data according to the determined acquisition times and starting time to obtain an acquisition result;
and determining a total acquisition result under the target acquisition frequency according to the acquisition result of each acquisition.
In one embodiment, determining the acquisition times of the data acquisition device according to the target acquisition frequency and the current acquisition frequency specifically includes: and determining the acquisition times of the data acquisition unit according to the condition that N is f1/f2, wherein N represents the acquisition times, f1 represents the target acquisition frequency, and f2 represents the current acquisition frequency.
In one embodiment, determining the starting time of the data collector at each collection time according to the target collection frequency and the current collection frequency specifically includes: and determining the starting time of each acquisition of the data acquisition unit according to the t-t 2/t1, wherein t represents the starting time of each acquisition of the data acquisition unit, n represents the nth acquisition, t1 represents a target acquisition time interval corresponding to the target acquisition frequency, and t2 represents the current acquisition time interval corresponding to the current acquisition frequency.
In one embodiment, the data acquisition is performed according to the determined acquisition times and the determined start time to obtain an acquisition result, and the method specifically includes: and for each data acquisition, sequentially starting the signal source and the data acquisition unit according to the determined starting time to acquire data and obtain an acquisition result, wherein the starting time represents the time interval between the starting of the signal source and the starting of the data acquisition unit.
In one embodiment, determining a total acquisition result at a target acquisition frequency according to an acquisition result of each acquisition specifically includes: and integrating the acquisition results acquired each time according to the acquisition sequence to obtain a total acquisition result under the target acquisition frequency.
The embodiment of the application provides a high-speed collection system of time domain reflected signal, includes:
the first determining module is used for determining the acquisition times of the data acquisition unit and the starting time of each acquisition according to the target acquisition frequency and the current acquisition frequency; the target acquisition frequency is the acquisition frequency required for acquiring the time domain reflection signal, the current acquisition frequency is the acquisition frequency of a data acquisition device for acquiring the time domain reflection signal currently, and the difference value between the target acquisition frequency and the current acquisition frequency is greater than a preset threshold value;
the acquisition module acquires data according to the determined acquisition times and starting time to obtain an acquisition result;
and the second determining module is used for determining a total acquisition result under the target acquisition frequency according to the acquisition result acquired each time.
The embodiment of the application provides a high-speed acquisition method and a high-speed acquisition device for time domain reflected signals. And a plurality of data acquisition results can be obtained by carrying out a plurality of times of data acquisition through the data acquisition unit. These acquisition results may then be superimposed to determine a total acquisition result at the target acquisition frequency. By the method, a low-frequency data acquisition device can achieve a high-frequency data acquisition effect, reduce the data acquisition cost and reduce the time sequence control requirement on the data acquisition device.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application.
In the drawings:
fig. 1 is a flowchart of a high-speed acquisition method of a time domain reflection signal according to an embodiment of the present disclosure;
fig. 2(a) is a schematic diagram of a first data acquisition provided by an embodiment of the present application;
fig. 2(b) is a schematic diagram of a second data acquisition provided by an embodiment of the present application;
fig. 2(c) is a schematic diagram of a third data acquisition provided in the embodiment of the present application;
FIG. 2(d) is a schematic diagram of a fourth data acquisition provided by an embodiment of the present application;
fig. 2(e) is a schematic diagram of a fifth data acquisition according to an embodiment of the present application;
FIG. 2(f) is a schematic diagram of a sixth data acquisition provided by an embodiment of the present application;
fig. 2(g) is a schematic diagram of a seventh data acquisition provided in the embodiment of the present application;
fig. 2(h) is a schematic diagram of an eighth data acquisition provided in the embodiment of the present application;
fig. 2(i) is a schematic diagram of a ninth data acquisition provided in the embodiment of the present application;
fig. 2(j) is a schematic diagram of a tenth data acquisition according to the embodiment of the present application;
FIG. 2(k) is a schematic diagram of the overall data acquisition effect provided by the embodiment of the present application;
fig. 3 is a schematic structural diagram of a high-speed acquisition device for time-domain reflection signals according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a flowchart of a high-speed acquisition method for a time domain reflection signal according to an embodiment of the present application, which specifically includes the following steps:
s101: and determining the acquisition times of the data acquisition unit and the starting time of each acquisition according to the target acquisition frequency and the current acquisition frequency.
In the embodiment of the application, the server can calculate the acquisition times of the data acquisition unit and the starting time of each acquisition according to the preset target acquisition frequency and the current acquisition frequency. The target acquisition frequency represents an acquisition frequency required for acquiring a time domain reflection signal, and the current acquisition frequency represents an acquisition frequency of a data acquisition unit applied in the embodiment of the present application. The target acquisition frequency is high, 100MHz or even higher, while the current acquisition frequency is low, e.g., 10 MHz. Thus, the difference between the target acquisition frequency and the current acquisition frequency may be greater than a preset threshold, which may be determined as desired.
Specifically, the server may calculate the collection times of the data collector according to N ═ f1/f 2. Where N denotes the number of acquisitions, f1 denotes the target acquisition frequency, and f2 denotes the current acquisition frequency. Because the target acquisition frequency is high and the current acquisition frequency is low, in order to enable the data acquisition device with relatively low frequency to achieve the data acquisition effect of relatively high target acquisition frequency through the current acquisition frequency, the data acquisition device needs to acquire for many times. For example, if the target acquisition frequency is 100MHz and the current acquisition frequency is 10MHz, N is calculated to be 100/10 ═ 10 times, that is, the data acquisition unit needs to perform 10 times of data acquisition.
Specifically, the server can calculate the starting time of the data collector when collecting data each time according to t ═ n-1 × t2/t 1. Wherein t represents the starting time of the data collector at each acquisition, n represents the nth acquisition, t1 represents the target acquisition time interval corresponding to the target acquisition frequency, i.e. the acquisition time interval at the target acquisition frequency, and t2 represents the current acquisition time interval corresponding to the current acquisition frequency, i.e. the acquisition time interval at the current acquisition frequency.
According to the relationship between frequency and time, the target acquisition time interval t1 is 1/f1, and the current acquisition time interval t2 is 1/f 2. Along with the above example, when the target acquisition frequency is 100MHz, the target acquisition time interval is 10ns, and when the current acquisition frequency is 10MHz, the current acquisition time interval is 100 ns.
When the data acquisition unit is used for acquiring data for N times, in order to achieve the effect of high-frequency data acquisition, the starting time of the data acquisition unit for N times of data acquisition needs to be adjusted, so that the data acquisition result obtained by the data acquisition unit for N times of low-frequency data acquisition can have the same effect as the data acquisition result obtained by the high-frequency data acquisition. Along with the above example, when the target acquisition frequency is 100MHz and the current acquisition frequency is 10MHz, in order to reach the target acquisition frequency of 100MHz, the data acquisition device may perform 10 times of data acquisition, and the start time of the 10 times of data acquisition may be 0ns, 10ns, 20ns, 30ns, 40ns, 50ns, 60ns, 70ns, 80ns, and 90ns, respectively.
S102: and acquiring data according to the determined acquisition times and the starting time to obtain an acquisition result.
In the embodiment of the application, the server can acquire data according to the determined acquisition times of the data acquisition unit and the starting time of each acquisition, and acquire an acquisition result.
Specifically, when the server controls the data acquisition unit to perform multiple data acquisition, the server can sequentially start the signal source and the data acquisition unit according to the determined starting time of the data acquisition for each data acquisition, so as to perform data acquisition and obtain an acquisition result. Wherein the start time represents a time interval between the start signal source and the start data collector.
In the application scenario of the time domain reflectometry, when data is collected, a server generally controls a signal source to emit a signal, and controls a data collector to start up to collect the data. In the embodiment of the application, because data acquisition needs to be performed for multiple times, a signal source needs to be restarted every time data acquisition is performed. Therefore, the starting time of the signal source can be used as a standard of the starting time of the data collector, and the starting time of the data collector represents the interval between the starting time of the signal source and the starting time of the data collector. The time interval between the control signal source restarts of the server each time, that is, the time interval during each data acquisition, can be determined according to a preset time interval, and the shorter the preset time interval, the better. Ideally, there may be a seamless connection between each data acquisition.
By using the above example, fig. 2(a) to 2(j) are schematic diagrams of data acquisition of the embodiments of the present application. As shown in fig. 2(a) to 2(j), the abscissa represents the data acquisition time interval in 10ns, that is, 1 unit in the abscissa represents 10ns, the ordinate represents the signal amplitude of the time domain reflection signal, and the vertical lines in the drawings represent the time domain reflection signals corresponding to the corresponding data acquisition time at the time of the data acquisition.
In fig. 2(a), the time interval between the start time of the data collector and the start time of the signal source is 0, and the time of data collection is 0, 100ns, 200ns, 300ns, … …, m × 100ns, where m is a natural number.
In fig. 2(b), the time interval between the start time of the data collector and the start time of the signal source is 10ns, the time of data collection is 10ns, 110ns, 210ns, 310ns, … …, m × 100+10ns, where m is a natural number.
In fig. 2(c), the time interval between the start time of the data collector and the start time of the signal source is 20ns, the time of data collection is 20ns, 120ns, 220ns, 320ns, … …, m × 100+20ns, where m is a natural number.
In fig. 2(d), the time interval between the start time of the data collector and the start time of the signal source is 30ns, the time of data collection is 30ns, 130ns, 230ns, 330ns, … …, m × 100+30ns, where m is a natural number.
In fig. 2(e), the time interval between the start time of the data collector and the start time of the signal source is 40ns, the time of data collection is 40ns, 140ns, 240ns, 340ns, … …, m × 100+40ns, where m is a natural number.
In fig. 2(f), the time interval between the start time of the data collector and the start time of the signal source is 50ns, the time of data collection is 50ns, 150ns, 250ns, 350ns, … …, m × 100+50ns, where m is a natural number.
In fig. 2(g), the time interval between the start time of the data collector and the start time of the signal source is 60ns, the time of data collection is 60ns, 160ns, 260ns, 360ns, … …, m × 100+60ns, where m is a natural number.
In fig. 2(h), the time interval between the start time of the data collector and the start time of the signal source is 70ns, the time of data collection is 70ns, 170ns, 270ns, 370ns, … …, and m × 100+70ns, where m is a natural number.
In fig. 2(i), the time interval between the start time of the data collector and the start time of the signal source is 80ns, the time of data collection is 80ns, 180ns, 280ns, 380ns, … …, and m is 100+80ns, where m is a natural number.
In fig. 2(j), the time interval between the start time of the data collector and the start time of the signal source is 90ns, the time of data collection is 90ns, 190ns, 290ns, 390ns, … …, m × 100+90ns, where m is a natural number.
Fig. 2(k) is a schematic diagram of the overall data acquisition effect provided in the embodiment of the present application. As shown in fig. 2(k), the abscissa represents the data acquisition time interval, the unit is 10ns, the ordinate represents the signal amplitude of the time domain reflection signal, and the vertical lines in the graph represent the time domain reflection signal corresponding to the data acquisition time after the ten times of data acquisition integration.
In fig. 2(k), through the integration of the ten data acquisitions, according to the total data acquisition effect, the time of data acquisition by the data acquisition device can be regarded as 0, 10ns, 20ns, 30ns, 40ns, … …, m × 10ns, where m is a natural number. That is to say, after the data acquisition of many times low frequency is integrated, the effect of data acquisition of high frequency can be achieved.
S103: and determining a total acquisition result under the target acquisition frequency according to the acquisition result of each acquisition.
In the embodiment of the application, the server can obtain a plurality of acquisition results after sequentially acquiring data according to the determined data acquisition times. Then, the server can determine the total acquisition result according to the acquisition result acquired each time. Specifically, the server may integrate the time domain reflection signals obtained from each data acquisition according to the acquisition sequence of the sequential acquisition, and may obtain a total acquisition result, that is, the time domain reflection signals at the target acquisition frequency.
As shown in fig. 2(a) to 2(j), along the acquisition results obtained from the data acquisition of the 10 times low frequency and the interval of 100ns, the total acquisition results of the high frequency time domain reflection signals of the interval of 10ns, i.e. the smooth curves shown in the figure, can be integrated.
In the embodiment of the present application, since in the application scenario of the time domain reflection technology, the start-up of the signal source can be controlled by the server, and the problem of the line detected by the time domain reflection signal is usually fixed and will not change in a short time. Therefore, data acquisition does not need to be carried out simultaneously by a plurality of low-frequency data acquisition devices, and data acquisition can be carried out by only one data acquisition device. The high-frequency data acquisition effect can be realized by repeatedly starting the signal source for multiple times and controlling the time interval between the starting time of the data acquisition unit and the signal source. The requirement on the acquisition frequency of the data acquisition device is reduced, the data acquisition cost is reduced, and meanwhile, the requirement on the time sequence control of the server is lower.
Based on the same inventive concept, the embodiment of the present application further provides a corresponding high-speed acquisition apparatus for the time domain reflection signal, as shown in fig. 3.
Fig. 3 is a schematic structural diagram of a high-speed acquisition device of a time domain reflection signal provided in an embodiment of the present application, which specifically includes:
the first determining module 301 determines the acquisition times of the data acquisition device and the starting time of each acquisition according to the target acquisition frequency and the current acquisition frequency;
the acquisition module 302 is used for acquiring data according to the determined acquisition times and starting time to obtain an acquisition result;
the second determining module 303 determines a total acquisition result at the target acquisition frequency according to the acquisition result of each acquisition.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (4)
1. A high-speed acquisition method of a time domain reflection signal is characterized by comprising the following steps:
determining the acquisition times of the data acquisition unit and the starting time of each acquisition according to the target acquisition frequency and the current acquisition frequency; the target acquisition frequency is the acquisition frequency required for acquiring the time domain reflection signal, the current acquisition frequency is the acquisition frequency of a data acquisition device for acquiring the time domain reflection signal currently, and the difference value between the target acquisition frequency and the current acquisition frequency is greater than a preset threshold value;
acquiring data according to the determined acquisition times and starting time to obtain an acquisition result;
determining a total acquisition result under a target acquisition frequency according to the acquisition result of each acquisition;
according to the target acquisition frequency and the current acquisition frequency, the acquisition times of the data acquisition device are determined, and the method specifically comprises the following steps:
determining the acquisition times of the data acquisition device according to the condition that N is f1/f2, wherein N represents the acquisition times, f1 represents the target acquisition frequency, and f2 represents the current acquisition frequency;
according to the target acquisition frequency and the current acquisition frequency, determining the starting time of the data acquisition unit during each acquisition, specifically comprising:
and determining the starting time of each acquisition of the data acquisition unit according to the t-t 2/t1, wherein t represents the starting time of each acquisition of the data acquisition unit, n represents the nth acquisition, t1 represents a target acquisition time interval corresponding to the target acquisition frequency, and t2 represents the current acquisition time interval corresponding to the current acquisition frequency.
2. The method according to claim 1, wherein the data acquisition is performed according to the determined acquisition times and start time to obtain the acquisition result, and specifically comprises:
and for each data acquisition, sequentially starting the signal source and the data acquisition unit according to the determined starting time to acquire data and obtain an acquisition result, wherein the starting time represents the time interval between the starting of the signal source and the starting of the data acquisition unit.
3. The method according to claim 1, wherein determining a total acquisition result at the target acquisition frequency according to the acquisition result of each acquisition comprises:
and integrating the acquisition results acquired each time according to the acquisition sequence to obtain a total acquisition result under the target acquisition frequency.
4. A high-speed acquisition device for time-domain reflected signals, comprising:
the first determining module is used for determining the acquisition times of the data acquisition unit and the starting time of each acquisition according to the target acquisition frequency and the current acquisition frequency; the target acquisition frequency is the acquisition frequency required for acquiring the time domain reflection signal, the current acquisition frequency is the acquisition frequency of a data acquisition device for acquiring the time domain reflection signal currently, and the difference value between the target acquisition frequency and the current acquisition frequency is greater than a preset threshold value; determining the acquisition times of the data acquisition device according to the condition that N is f1/f2, wherein N represents the acquisition times, f1 represents the target acquisition frequency, and f2 represents the current acquisition frequency; determining the starting time of each acquisition of the data acquisition unit according to t ═ n-1 × (t) t2/t1, wherein t represents the starting time of each acquisition of the data acquisition unit, n represents the nth acquisition, t1 represents the target acquisition time interval corresponding to the target acquisition frequency, and t2 represents the current acquisition time interval corresponding to the current acquisition frequency
The acquisition module acquires data according to the determined acquisition times and starting time to obtain an acquisition result;
and the second determining module is used for determining a total acquisition result under the target acquisition frequency according to the acquisition result acquired each time.
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| CN1114286C (en) * | 2000-06-27 | 2003-07-09 | 华为技术有限公司 | High-speed data acquisition and real-time accumulation circuit for light-time domain reflectometer |
| DE102004032130B4 (en) * | 2004-07-01 | 2010-12-16 | Krohne Messtechnik Gmbh | Frequency synthesizer and method for operating a frequency synthesizer |
| US7403274B2 (en) * | 2006-07-16 | 2008-07-22 | Fluke Corporation | Equivalent time sampling system |
| US7893695B2 (en) * | 2007-04-20 | 2011-02-22 | Verigy (Singapore) Pte. Ltd. | Apparatus, method, and computer program for obtaining a time-domain-reflection response-information |
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