CN110736877A - 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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Abstract
The application discloses high-speed acquisition methods and devices of time domain reflection signals, which are used for solving the problems of high cost and complex control of the existing acquisition method.
Description
Technical Field
The application relates to the technical field of communication, in particular to a high-speed acquisition method and device for time domain reflection signals.
Background
Time-Domain Reflectometry (TDR) is commonly used for measuring the characteristic impedance of a transmission line, and for locating the position of a break point, a short-circuit point, and the like of the transmission line, and is very widely used in the fields of radar, cable fault test, optical cable fault 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 high-speed acquisition methods and devices for time domain reflection signals, and aims to solve the problems of high cost and complex control of the existing acquisition methods.
The high-speed acquisition methods for the time domain reflection signals provided by the embodiment of the application comprise:
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 embodiments, determining the acquisition times of the data acquirer according to the target acquisition frequency and the current acquisition frequency specifically includes determining the acquisition times of the data acquirer according to N-f 1/f2, where N denotes the acquisition times, f1 denotes the target acquisition frequency, and f2 denotes the current acquisition frequency.
In embodiments, determining the start-up time of each acquisition of the data acquisition device according to the target acquisition frequency and the current acquisition frequency specifically includes determining the start-up time of each acquisition of the data acquisition device according to t ═ n-1) × t2/t1, where t represents the start-up time of each acquisition of the data acquisition device, n represents the nth acquisition, t1 represents a target acquisition time interval corresponding to the target acquisition frequency, and t2 represents a current acquisition time interval corresponding to the current acquisition frequency.
In embodiments, acquiring data according to the determined acquisition times and start time to obtain an acquisition result, specifically including, for each data acquisition, sequentially starting a signal source and a data acquisition device according to the determined start time to acquire data, and obtaining an acquisition result, where the start time represents a time interval between starting the signal source and starting the data acquisition device.
In embodiments, determining a total acquisition result at the target acquisition frequency according to the acquisition result of each acquisition includes integrating the acquisition results of each acquisition according to the acquisition order to obtain the total acquisition result at the target acquisition frequency.
The embodiment of this application provides a high-speed collection system of kinds of time domain reflection signals, includes:
an determining module, which determines the collection times of the data collector and the starting time of each collection according to a target collection frequency and a current collection frequency, wherein the target collection frequency is the collection frequency required for collecting the time domain reflection signal, the current collection frequency is the collection frequency of the data collector which currently collects the time domain reflection signal, and the difference between the target collection frequency and the current collection frequency is greater than a preset threshold;
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 time domain reflected signal high-speed acquisition methods and devices, the method can determine the acquisition times of a data acquisition device according to a high-frequency target acquisition frequency and a relatively low-frequency current acquisition frequency, multiple data acquisition is carried out through the data acquisition device, multiple acquisition results can be obtained, and then the acquisition results can be superposed to determine a total acquisition result under the target acquisition frequency.
Drawings
The drawings described herein are for providing an -step understanding of the present application and constitute a part of this application, , and the present application is illustrative of the exemplary embodiments and description thereof and is not to be construed as limiting the present 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 view of th data acquisition according to 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
For purposes of clarity, technical solutions and advantages of the present application, the present application will be described in detail and in full with reference to specific embodiments of the present application and accompanying drawings.
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 acquisition is performed, a server generally controls a signal source to transmit a signal, and simultaneously controls a data acquisition unit to start up so as to perform 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 application, in the application scene of the time domain reflection technology, the starting 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 cannot be changed in a short time.
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 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 (6)
1, high-speed acquisition method of time domain reflection signal, characterized by that, including:
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.
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 the acquisition times of the data acquisition device according to the target acquisition frequency and the current acquisition frequency specifically comprises:
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.
4. The method according to claim 3, wherein determining the start time of each acquisition of the data acquisition device according to the target acquisition frequency and the current acquisition frequency specifically comprises:
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.
5. 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.
6, kind of high-speed collection system of time domain reflected signal, characterized by that, includes:
an determining module, which determines the collection times of the data collector and the starting time of each collection according to a target collection frequency and a current collection frequency, wherein the target collection frequency is the collection frequency required for collecting the time domain reflection signal, the current collection frequency is the collection frequency of the data collector which currently collects the time domain reflection signal, and the difference between the target collection frequency and the current collection frequency is greater than a preset threshold;
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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