CN116930728B - Track circuit testing system, method and device, electronic equipment and storage medium - Google Patents
Track circuit testing system, method and device, electronic equipment and storage medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 65
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- 238000005070 sampling Methods 0.000 claims description 159
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2843—In-circuit-testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention relates to the technical field of track circuit signal measurement, in particular to a track circuit test system, a method, a device, electronic equipment and a storage medium. According to the track circuit testing method, the frequency of the signal waveform is determined based on the data slipping and comparing modes, compared with the mode of detecting zero crossing points, the influence of interference is reduced, and the accuracy of the determined waveform frequency is higher. And the amplitude and the direct current component of the signal waveform are extracted based on the waveform frequency, when the signal waveform is a product waveform, the direct current component value can be extracted to determine the phase difference, the calculation cost is low, and the precision is high.
Description
Technical Field
The present invention relates to the field of track circuit signal measurement technologies, and in particular, to a track circuit test system, a track circuit test method, a track circuit test device, an electronic device, and a storage medium.
Background
The track circuit is composed of a rail line and a rail insulation circuit, and is used for automatically and continuously detecting whether the rail line is occupied by rolling stock or not, and is also used for controlling a signal device or a switching device so as to ensure driving safety. The whole track system road network is divided into a plurality of blocking sections according to proper distance, each blocking section is divided by a track insulation joint to form an independent track circuit, the starting point of each section is provided with a signal machine (color lamp type signal machine), when a train enters the blocking section, the track circuit immediately reacts and conveys the information that the train in the section passes through and inhibits other trains from entering to the signal machine, and at the moment, the signal machine at the section entrance immediately displays dangerous and forbidden information.
Because the locomotive power supply circuit and the track circuit share the rail transmission, the two circuits can generate interference, and the influence of the locomotive power supply circuit on the track circuit is larger as the interference result. In order to reduce the influence on the track circuit, various approaches have been devised, one of which is to change the voltage frequency and phase of the track circuit at the same time, i.e. a phase-sensitive track circuit. The phase-sensitive track circuit is different from a locomotive power supply circuit, is powered by a 25Hz power supply, is divided into a track power supply and a local power supply, and is used for controlling a track relay (usually a binary two-position relay) of the indication signal machine to act to indicate that the track circuit is idle only when the frequency and the voltage of the track power supply and the local power supply meet the requirements and the phase difference is 90 degrees. In this way, the anti-interference performance of the track circuit is greatly enhanced. At the same time, the sensitivity of the track circuit is also improved, for example, when there is a significant deviation in phase or a significant deviation in voltage, the track relay may be deactivated, and further an erroneous track indication is made.
To solve the problems of the track circuit, a track circuit test board has been developed. The track circuit test pad will give various parameters of the power supply, such as track power supply voltage, track power supply frequency, phase of the track power supply relative to the local power supply, etc., based on the track power supply and the local power supply. In the related art, a plurality of related parameters including phases and frequencies are calculated by sampling waveforms of a track power supply and a local power supply and then performing fourier transformation, and because one track circuit test board is required to measure a plurality of groups of track power supplies at the same time, the requirement on the synchronism of waveform sampling moments is high, and the calculation cost is high.
Based on this, a track circuit test system and a track circuit test method need to be developed and designed.
Disclosure of Invention
The embodiment of the invention provides a track circuit testing system, a method, a device, electronic equipment and a storage medium, which are used for solving the problem that the track circuit testing system in the prior art has higher requirement on waveform sampling synchronism.
In a first aspect, an embodiment of the present invention provides a track circuit testing system, including:
the device comprises a signal preprocessing unit, a sampling unit and a calculating unit;
The output end of the signal preprocessing unit is electrically connected with the input end of the sampling unit, and the output end of the sampling unit is electrically connected with the input end of the calculating unit;
when two input ends of the signal preprocessing unit respectively input the waveform of the track power supply and the waveform of the local power supply, the output end of the signal preprocessing unit outputs a product waveform, wherein the product waveform is the product waveform of the track power supply and the waveform of the local power supply;
the sampling unit samples the signal waveform output by the output end of the signal preprocessing unit to obtain a plurality of sampling data, and the calculating unit outputs data indicating the track power supply state and the local power supply state according to the plurality of sampling data.
In one possible implementation, the signal preprocessing unit includes: a first logarithmic circuit, a second logarithmic circuit, a first switch, a second switch, an addition circuit, and an exponential circuit;
the two ends of the first switch are respectively and electrically connected with the output end of the first logarithmic circuit and the first input end of the adding circuit, the two ends of the second switch are respectively and electrically connected with the output end of the second logarithmic circuit and the second input end of the adding circuit, and the output end of the adding circuit is electrically connected with the input end of the exponential circuit;
When the first switch and the second switch are both closed and the waveform of the track power supply and the waveform of the local power supply are input through the input end of the first logarithmic circuit and the input end of the second logarithmic circuit, the output end of the exponential circuit outputs the product waveform of the track power supply and the waveform of the local power supply.
In one possible implementation, the computing unit outputs data indicative of a track power state and a local power state from the plurality of sampled data, including:
the computing unit determines the frequency of the signal waveform according to the plurality of sampling data in a mode of multiple data slipping and comparison;
determining the amplitude value and the direct current component value of the signal waveform according to the plurality of sampling data and the frequency of the signal waveform;
and determining the track power supply state and the local power supply state according to the amplitude value and the direct current component value of the signal waveform.
In a second aspect, an embodiment of the present invention provides a track circuit testing method, which is applied to the track circuit testing system described in the first aspect, and includes:
acquiring a plurality of sampling data, wherein the sampling data are obtained by sampling based on a signal waveform output by an output end of the signal preprocessing unit;
Determining the frequency of the signal waveform by means of multiple data slipping and comparison according to the multiple sampling data;
determining the amplitude value and the direct current component value of the signal waveform according to the plurality of sampling data and the frequency of the signal waveform;
and determining the track power supply state and the local power supply state according to the amplitude value and the direct current component value of the signal waveform.
In one possible implementation manner, the determining the frequency of the signal waveform according to the plurality of sampling data through a plurality of data slipping and comparing manners includes:
obtaining the sampling quantity;
retrieving a first array from a first location in the plurality of sampled data according to the number of samples;
an associated array acquisition step: sequentially taking out a plurality of second arrays in a sliding manner from a second position in the plurality of sampling data according to the sampling quantity, and determining an associated array representing the association of the plurality of second arrays with the first array according to the first array and the plurality of second arrays;
selecting the number with the largest value from the association array as a target association value;
determining a target interval according to the target association value, wherein the target interval is the difference between the position of the second array corresponding to the target association value and the first position;
Adding the target interval into an interval array;
if the sampling number does not reach the sampling number limit value, adjusting the sampling number and jumping to the associated array acquisition step;
otherwise, determining the period sampling number according to the interval array, wherein the period sampling number represents the number of sampling data in the signal waveform fluctuation period;
and determining the frequency of the signal waveform according to the period sampling number and the data sampling interval.
In one possible implementation manner, the sequentially taking a plurality of second arrays from a second position in the plurality of sampling data in a sliding manner according to the sampling number, and determining an associated array characterizing the association between the plurality of second arrays and the first array according to the first array and the plurality of second arrays includes:
retrieving a second array from a second location in the plurality of sampled data according to the number of samples;
determining a correlation value according to a first formula, a second array and the first array, wherein the first formula is as follows:
in the method, in the process of the invention,for the associated value +.>Is the +.>Data of->Is the +. >Data of->The total amount of data in the first array;
adding the association value into the association array;
and if the second position does not reach the end point of the sliding, adjusting the second position according to a preset sequence, and jumping to the step of taking out a second array from the second position in the plurality of sampling data according to the sampling quantity.
In one possible implementation manner, the determining the amplitude and the dc component value of the signal waveform according to the plurality of sampling data and the frequency of the signal waveform includes:
determining a periodic sampling number according to the plurality of sampling data and the frequency of the signal waveform, wherein the periodic sampling number represents the number of sampling data in the fluctuation period of the signal waveform;
extracting the data of the periodic sampling number from the plurality of sampling data to form a third array;
determining the direct current component value according to a third formula and a plurality of elements in the third array, wherein the third formula is as follows:
in the method, in the process of the invention,is a direct current component value, +.>Third group +.>Data of->The total number of data in the third array;
determining the amplitude of the signal waveform according to a fourth formula, the direct current component value and the third array, wherein the fourth formula is as follows:
In the method, in the process of the invention,is the amplitude of the signal waveform.
In one possible implementation, the track power state and the local power state include a phase difference between the track power and the local power, and the determining the track power state and the local power state according to the amplitude and the dc component value of the signal waveform includes:
when the signal waveform is a product waveform, determining a phase difference between the track power supply and the local power supply according to a fifth formula, the amplitude of the signal waveform and the direct current component value, wherein the fifth formula is as follows:
in the method, in the process of the invention,is the phase difference between the track power supply and the local power supply, +.>Is an inverse cosine function>Is a direct current component value, +.>Is the amplitude of the signal waveform;
and when the signal waveform is a track power waveform or a local power waveform, determining an effective value of the track power or an effective value of the local power according to the amplitude of the signal waveform.
In a third aspect, an embodiment of the present invention provides a track circuit testing device, configured to implement the track circuit testing method according to the second aspect or any one of the possible implementation manners of the second aspect, where the track circuit testing device includes:
the sampling data acquisition module is used for acquiring a plurality of sampling data, wherein the sampling data are obtained by sampling based on a signal waveform output by the output end of the signal preprocessing unit;
The frequency determining module of the signal waveform is used for determining the frequency of the signal waveform in a mode of multiple data slipping and comparison according to the multiple sampling data;
the waveform characteristic extraction module is used for determining the amplitude value and the direct current component value of the signal waveform according to the plurality of sampling data and the frequency of the signal waveform;
the method comprises the steps of,
and the power state analysis module is used for determining the track power state and the local power state according to the amplitude value and the direct current component value of the signal waveform.
In a fourth aspect, embodiments of the present invention provide an electronic device comprising a memory and a processor, the memory having stored therein a computer program executable on the processor, the processor implementing the steps of the method according to the above second aspect or any one of the possible implementations of the second aspect when the computer program is executed.
In a fifth aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method as described above in the second aspect or any one of the possible implementations of the second aspect.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
the track circuit testing system implementation mode is provided with the signal preprocessing unit which is used for receiving the waveform of the track power supply and the waveform of the local power supply simultaneously and synthesizing the product waveform according to the two waveforms, so that the synchronism is ensured, and the sampling rate and the subsequent calculation requirements are reduced because the waveforms are multiplied.
The track circuit testing method comprises the steps of firstly obtaining a plurality of sampling data, wherein the sampling data are obtained by sampling based on a signal waveform output by an output end of a signal preprocessing unit; then determining the frequency of the signal waveform by means of multiple data slipping and comparison according to the multiple sampling data; then, according to the plurality of sampling data and the frequency of the signal waveform, determining the amplitude value and the direct current component value of the signal waveform; and finally, determining the track power supply state and the local power supply state according to the amplitude value and the direct current component value of the signal waveform. The embodiment of the invention determines the frequency of the signal waveform based on the data slipping and comparing modes, and compared with the mode of detecting the zero crossing point, the method reduces the influence of interference and has higher accuracy of the determined waveform frequency. And the amplitude and the direct current component of the signal waveform are extracted based on the waveform frequency, when the signal waveform is a product waveform, the direct current component value can be extracted to determine the phase difference, the calculation cost is low, and the precision is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a track circuit provided by an embodiment of the present invention;
FIG. 2 is a functional block diagram of a track circuit testing system provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a signal preprocessing unit provided by an embodiment of the present invention;
FIG. 4 is a flowchart of a track circuit testing method provided by an embodiment of the present invention;
FIG. 5 is a functional block diagram of a track circuit testing device provided by an embodiment of the present invention;
fig. 6 is a functional block diagram of an electronic device provided by an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made with reference to the accompanying drawings.
The following describes in detail the embodiments of the present invention, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation procedure are given, but the protection scope of the present invention is not limited to the following embodiments.
FIGS. 1 and 2 are schematic diagrams of a track circuit and a functional block diagram of a track circuit test system, respectively, provided by embodiments of the present invention;
an embodiment of the present invention provides a track circuit testing system, which is described in detail below:
a track circuit testing system, comprising:
the device comprises a signal preprocessing unit, a sampling unit and a calculating unit;
the output end of the signal preprocessing unit is electrically connected with the input end of the sampling unit, and the output end of the sampling unit is electrically connected with the input end of the calculating unit;
when two input ends of the signal preprocessing unit respectively input the waveform of the track power supply and the waveform of the local power supply, the output end of the signal preprocessing unit outputs a product waveform, wherein the product waveform is the product waveform of the track power supply and the waveform of the local power supply;
The sampling unit samples the signal waveform output by the output end of the signal preprocessing unit to obtain a plurality of sampling data, and the calculating unit outputs data indicating the track power supply state and the local power supply state according to the plurality of sampling data.
In one embodiment, the signal preprocessing unit includes: a first logarithmic circuit, a second logarithmic circuit, a first switch, a second switch, an addition circuit, and an exponential circuit;
the two ends of the first switch are respectively and electrically connected with the output end of the first logarithmic circuit and the first input end of the adding circuit, the two ends of the second switch are respectively and electrically connected with the output end of the second logarithmic circuit and the second input end of the adding circuit, and the output end of the adding circuit is electrically connected with the input end of the exponential circuit;
when the first switch and the second switch are both closed and the waveform of the track power supply and the waveform of the local power supply are input through the input end of the first logarithmic circuit and the input end of the second logarithmic circuit, the output end of the exponential circuit outputs the product waveform of the track power supply and the waveform of the local power supply.
As shown in fig. 1, the schematic diagram of the track circuit according to the embodiment of the present invention is shown, in the schematic diagram, a power supply of 220v at 50Hz is provided by an external power supply, and frequency divider waveforms of 25Hz are obtained by frequency division of the track frequency divider 101 and the local frequency divider 102, respectively, and since the output waveforms of the two track frequency dividers are obtained by frequency division based on the same power supply waveform, the frequencies of the output waveforms of the two track frequency dividers maintain good consistency, and the waveforms of the two frequency dividers are 90 ° out of phase at this time.
Then, the output of the track frequency divider 101 is loaded to the first track end 103 through voltage regulation and impedance matching equipment, and the waveform of the track frequency divider is input to the track power supply input end of the track relay 105 through the second track end 104 through impedance matching equipment. The output waveform of the local frequency divider 102 is input to the local power input end of the track relay 105, when the voltage effective values, phases and frequencies of the two power input ends of the track relay 105 meet the requirements, the track relay 105 acts to give an indication of track idleness, otherwise, the track relay 105 does not act.
Because the track frequency divider 101 is transmitted for a certain distance, and impedance matching, voltage regulation and some harmonic suppression measures are performed in the transmission process, when the voltage waveform finally output by the track frequency divider 101 reaches the input end of the track relay 105, the waveform phase of the voltage waveform is changed relative to the waveform phase output by the local frequency divider 102, and when the change is more, the track relay 105 can not be driven to act, and a simplified mathematical model of the action torque of the track relay is as follows:
In the above-mentioned method, the step of,for the actuation torque of the track relay, +.>Track power supply input terminal electricity for track relayEffective value of pressure, +.>For the torque coefficient>For the effective value of the local supply input voltage of the track relay, < >>Is the phase difference between the waveform of the track power supply input end and the waveform of the local power supply input end of the track relay.
As can be seen from the above, when the phase difference deviation of the waveforms of the two input ends of the track relay is large, the action torque is small, and field practice shows that when the torque of the track relay is small, buzzing tremble sound is generated, and when the torque of the track relay is smaller than the action threshold, the track relay does not act, so that an error indication is generated.
Therefore, it is necessary to perform periodic inspection of the track circuit, and the importance of the inspection includes: the effective value of the voltage waveform of the two input ends of the track relay, the phase difference and the waveform frequency.
In the track circuit test system shown in fig. 2, the signal preprocessing unit 201 preprocesses the received waveform of the track power supply and the waveform of the local power supply, and the generated waveform is sampled by the sampling unit 202 to obtain a plurality of sampled data, and the plurality of sampled data are calculated by the calculating unit 203 to determine the state of the track power supply and the state of the local power supply.
Specifically, the state of the track power supply includes an effective value and a frequency of the track power supply output waveform and a phase difference of the track power supply output waveform relative to the local power supply output waveform, and the state of the local power supply includes the effective value and the frequency of the local power supply output waveform, and may further include an effective value of a product of the track power supply output waveform and the local power supply output waveform.
The functions of the signal and processing unit include multiplying the track power supply output waveform with the waveform of the local power supply to generate a product waveform, and the output result is expressed by the following formula:
in the method, in the process of the invention,is a waveform function of the track power supply, +.>Is a waveform function of local power supply, +.>Frequency of the track power waveform or the local power waveform, < >>Waveform phase for track power, +.>Waveform phase for local power supply, +.>Waveform amplitude for track power, +.>Is the waveform amplitude of the local power supply.
As can be seen from the above equation, the product waveform includes a dc component:this direct current component is positively correlated with the cosine values of the two power waveform phases; in addition, a frequency-doubled alternating waveform component (frequency doubling of the track power waveform or the local power waveform) is included: />。
The frequency of the alternating current component can be extracted through the alternating current waveform component, the amplitude of the alternating current component can be extracted based on the frequency of the alternating current component, further, the cosine values of the phases of the two power supply waveforms are extracted according to the amplitude of the alternating current component, and finally, the phases are determined according to the cosine values of the phases.
As shown in fig. 3, the signal preprocessing unit includes four main parts, namely a first logarithmic circuit Part1, a second logarithmic circuit Part2, an addition circuit Part4 and an exponential circuit Part5, so as to multiply the track power supply output waveform with the waveform of the local power supply to generate a product waveform output, specifically, the expression of the implementation of the first logarithmic circuit and the second logarithmic circuit is as follows:
in the method, in the process of the invention,for the output of logarithmic circuits, +.>And->Is the parameter of triode in the figure, +.>For R1 or R3 in the figure,the voltage at the input terminal is, in the figure, a rail power supply input voltage waveform and a local power supply input voltage waveform, respectively. The adder circuit performs an operation of adding the output results of the first and second logarithmic circuits.
For an exponential circuit, the expression is:
in the method, in the process of the invention,is of exponential circuitOutput (I)>And->Is the parameter of triode in the figure, +.>For the voltage at the output of the adder circuit, +.>Is natural constant (18)>R9 in the figure.
The operation of multiplying the waveforms of the two power supplies is completed by the above-described unit. Compared with the mode of respectively sampling waveforms based on two power supplies and processing the two paths of sampling data based on the sampling data, sampling synchronization operation is not needed, and as the unit completes multiplication operation, higher result precision can be obtained without higher sampling frequency during subsequent processing, and the calculation process is simplified.
In addition, in the embodiment of the present invention, a switch is provided between the output of the first logarithmic circuit and the input of the adder circuit, and between the output of the second logarithmic circuit and the input of the adder circuit, and when one of the switches is turned on (for example, the switch of the logarithmic circuit where the local power supply input voltage waveform is located is turned on, the second switch SW 2) outputs a signal (the signal of the rail power supply input voltage waveform) that is the other power supply waveform, and at this time, the effective value of the other power supply waveform (the signal of the rail power supply input voltage waveform) can be calculated by the calculating unit.
In one possible implementation, the computing unit outputs data indicative of a track power state and a local power state from the plurality of sampled data, including:
the computing unit determines the frequency of the signal waveform according to the plurality of sampling data in a mode of multiple data slipping and comparison;
determining the amplitude value and the direct current component value of the signal waveform according to the plurality of sampling data and the frequency of the signal waveform;
and determining the track power supply state and the local power supply state according to the amplitude value and the direct current component value of the signal waveform.
Fig. 4 is a flowchart of a track circuit testing method according to an embodiment of the present invention.
As shown in fig. 4, a flowchart of an implementation of the track circuit testing method according to the second aspect of the present invention is shown, and the details are as follows:
in step 401, a plurality of sampling data are acquired, wherein the sampling data are obtained by sampling based on a signal waveform output by an output end of the signal preprocessing unit.
In step 402, the frequency of the signal waveform is determined by means of a plurality of data slips and comparisons from the plurality of sample data.
In some embodiments, the step 402 includes:
obtaining the sampling quantity;
retrieving a first array from a first location in the plurality of sampled data according to the number of samples;
an associated array acquisition step: sequentially taking out a plurality of second arrays in a sliding manner from a second position in the plurality of sampling data according to the sampling quantity, and determining an associated array representing the association of the plurality of second arrays with the first array according to the first array and the plurality of second arrays;
selecting the number with the largest value from the association array as a target association value;
Determining a target interval according to the target association value, wherein the target interval is the difference between the position of the second array corresponding to the target association value and the first position;
adding the target interval into an interval array;
if the sampling number does not reach the sampling number limit value, adjusting the sampling number and jumping to the associated array acquisition step;
otherwise, determining the period sampling number according to the interval array, wherein the period sampling number represents the number of sampling data in the signal waveform fluctuation period;
and determining the frequency of the signal waveform according to the period sampling number and the data sampling interval.
In some embodiments, the sequentially taking a plurality of second arrays from a second location in the plurality of sampled data in a sliding manner according to the sampling number, and determining an associated array characterizing the association of the plurality of second arrays with the first array according to the first array and the plurality of second arrays, includes:
retrieving a second array from a second location in the plurality of sampled data according to the number of samples;
determining a correlation value according to a first formula, a second array and the first array, wherein the first formula is as follows:
In the method, in the process of the invention,for the associated value +.>Is the +.>Data of->Is the +.>Data of->The total amount of data in the first array;
adding the association value into the association array;
and if the second position does not reach the end point of the sliding, adjusting the second position according to a preset sequence, and jumping to the step of taking out a second array from the second position in the plurality of sampling data according to the sampling quantity.
Illustratively, as previously described, whether determining the effective value of the waveform of the local power supply, the effective value of the waveform of the rail power supply, or determining the phase difference, the first step requires determining the frequency of the waveform, which is determined by way of data slipping and comparison.
Specifically, firstly determining a sampling number, taking a piece of data from a plurality of sampling data according to the sampling number as a first array, then taking a piece of data from a second position every time slipping according to the sampling number, taking the piece of data as a second array, calculating with the first array through a first formula to obtain a correlation value, and adding the correlation value into the correlation array:
In the method, in the process of the invention,for the associated value +.>Is the +.>Data of->Is the +.>Data of->Is the total number of data in the first array.
And after slipping to a preset end point, selecting a second array corresponding to the maximum value from the associated arrays as a target array, determining a target interval according to the position of the target array and the position of the first array, and adding the target interval into the interval array. Here, the target interval is determined based on specific positions of two arrays, for example, a position difference between a position of a first data of the target array in the plurality of sampling data and a position of a first data of the first array in the plurality of sampling data is calculated, or a position difference between a position of a last data of the target array in the plurality of sampling data and a position of a last data of the first array in the plurality of sampling data is calculated as the target interval.
When the number of samples reaches a preset limit, the sliding operation is stopped, and at this time, an interval array is obtained, and the number of periodic samples is determined according to the interval array, in which case an arithmetic average value of a plurality of elements in the interval array is calculated as the number of periodic samples, and since the sampling interval (time difference between two samples) can be determined, the period and frequency of the signal waveform can be determined by calculating the sampling interval and the number of periodic samples.
It should be noted that, if the signal waveform is a product waveform, the product waveform formula described above can know that the obtained signal waveform frequency divided by 2 is the frequency of the waveform of the track power supply and the frequency of the waveform of the local power supply.
In step 403, the amplitude and the dc component value of the signal waveform are determined according to the plurality of sampling data and the frequency of the signal waveform.
In some embodiments, the step 403 includes:
determining a periodic sampling number according to the plurality of sampling data and the frequency of the signal waveform, wherein the periodic sampling number represents the number of sampling data in the fluctuation period of the signal waveform;
extracting the data of the periodic sampling number from the plurality of sampling data to form a third array;
determining the direct current component value according to a third formula and a plurality of elements in the third array, wherein the third formula is as follows:
in the method, in the process of the invention,is a direct current component value, +.>Third group +.>Data of->The total number of data in the third array;
determining the amplitude of the signal waveform according to a fourth formula, the direct current component value and the third array, wherein the fourth formula is as follows:
In the method, in the process of the invention,is the amplitude of the signal waveform.
Illustratively, when the signal waveform is a product waveform, a DC component is included therein. According to the periodic sampling number obtained in the previous step, the embodiment of the invention extracts data from a plurality of sampled data to form a third array, and calculates a direct current component value through the third array and a third formula:
in the method, in the process of the invention,is a direct current component value, +.>Third group +.>Data of->Is the total number of data in the third array.
And further calculating the amplitude of the signal waveform using a fourth formula:
in the method, in the process of the invention,is the amplitude of the signal waveform.
If the signal waveform is the waveform of the track power supply or the waveform of the local power supply, the dc component in the fourth equation is set to 0.
In step 404, the track power state and the local power state are determined based on the amplitude and the DC component values of the signal waveform.
In some embodiments, the step 404 includes: the track power state and the local power state include a phase difference between the track power and the local power, and when the signal waveform is a product waveform, the phase difference between the track power and the local power is determined according to a fifth formula, the amplitude of the signal waveform, and the dc component value, wherein the fifth formula is as follows:
In the method, in the process of the invention,for track power supply and local power supplyPhase difference (I)>Is an inverse cosine function>Is a direct current component value, +.>Is the amplitude of the signal waveform;
and when the signal waveform is a track power waveform or a local power waveform, determining an effective value of the track power or an effective value of the local power according to the amplitude of the signal waveform.
Illustratively, when the signal waveform is a product waveform, the phase difference may be calculated according to a fifth formula:
in the method, in the process of the invention,is the phase difference between the track power supply and the local power supply, +.>Is an inverse cosine function>Is a direct current component value, +.>Is the amplitude of the signal waveform.
And, when the signal waveform is a product waveform, the waveform frequency of the track power supply and the waveform frequency of the local power supply can be obtained by dividing the signal frequency obtained by the calculation in the foregoing steps by 2.
When the signal waveform is the waveform of the track power supply or the waveform of the local power supply, the amplitude and the effective value of the signal areThe relationship of the multiples, therefore, the effective value of the waveform of the track power supply or the effective value of the waveform of the local power supply can be obtained by the amplitude calculation of the signal waveform.
The track circuit testing system implementation mode is provided with the signal preprocessing unit which is used for receiving the waveform of the track power supply and the waveform of the local power supply simultaneously and synthesizing the product waveform according to the two waveforms, so that the synchronism is ensured, and the sampling rate and the subsequent calculation requirements are reduced because the waveforms are multiplied.
The track circuit testing method comprises the steps of firstly obtaining a plurality of sampling data, wherein the sampling data are obtained by sampling based on a signal waveform output by an output end of a signal preprocessing unit; then determining the frequency of the signal waveform by means of multiple data slipping and comparison according to the multiple sampling data; then, according to the plurality of sampling data and the frequency of the signal waveform, determining the amplitude value and the direct current component value of the signal waveform; and finally, determining the track power supply state and the local power supply state according to the amplitude value and the direct current component value of the signal waveform. The embodiment of the invention determines the frequency of the signal waveform based on the data slipping and comparing modes, and compared with the mode of detecting the zero crossing point, the method reduces the influence of interference and has higher accuracy of the determined waveform frequency. And the amplitude and the direct current component of the signal waveform are extracted based on the waveform frequency, when the signal waveform is a product waveform, the direct current component value can be extracted to determine the phase difference, the calculation cost is low, and the precision is high.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The following are device embodiments of the invention, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 5 is a functional block diagram of a track circuit testing apparatus according to an embodiment of the present invention, and referring to fig. 5, the track circuit testing apparatus includes: a sampling data acquisition module 501, a frequency determination module 502 of signal waveforms, a waveform feature extraction module 503 and a power state analysis module 504, wherein:
a sampling data obtaining module 501, configured to obtain a plurality of sampling data, where the sampling data is obtained by sampling based on a signal waveform output by an output end of the signal preprocessing unit;
a frequency determining module 502 of a signal waveform, configured to determine, according to the plurality of sampling data, a frequency of the signal waveform by a plurality of data slipping and comparing manners;
a waveform feature extraction module 503, configured to determine an amplitude value and a dc component value of the signal waveform according to the plurality of sampling data and a frequency of the signal waveform;
the power state analysis module 504 is configured to determine the track power state and the local power state according to the amplitude and the dc component value of the signal waveform.
Fig. 6 is a functional block diagram of an electronic device provided by an embodiment of the present invention. As shown in fig. 6, the electronic apparatus 6 of this embodiment includes: a processor 600 and a memory 601, said memory 601 having stored therein a computer program 602 executable on said processor 600. The processor 600, when executing the computer program 602, implements the steps of the track circuit testing method and embodiments described above, such as steps 401 to 404 shown in fig. 4.
Illustratively, the computer program 602 may be partitioned into one or more modules/units that are stored in the memory 601 and executed by the processor 600 to accomplish the present invention.
The electronic device 6 may be a computing device such as a desktop computer, a notebook computer, a palm computer, a cloud server, etc. The electronic device 6 may include, but is not limited to, a processor 600, a memory 601. It will be appreciated by those skilled in the art that fig. 6 is merely an example of the electronic device 6 and is not meant to be limiting of the electronic device 6, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., the electronic device 6 may also include input-output devices, network access devices, buses, etc.
The processor 600 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 601 may be an internal storage unit of the electronic device 6, such as a hard disk or a memory of the electronic device 6. The memory 601 may be an external storage device of the electronic device 6, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the electronic device 6. Further, the memory 601 may also include both an internal storage unit and an external storage device of the electronic device 6. The memory 601 is used for storing the computer program 602 and other programs and data required by the electronic device 6. The memory 601 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, and will not be described herein again.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and the details or descriptions of other embodiments may be referred to for those parts of an embodiment that are not described in detail or are described in detail.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/electronic device and method may be implemented in other manners. For example, the apparatus/electronic device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, each functional unit in each embodiment of the present invention may be integrated in one processing unit, each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on this understanding, the present invention may also be implemented by implementing all or part of the procedures in the methods of the above embodiments, or by instructing the relevant hardware by a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may be implemented by implementing the steps of the embodiments of the methods and apparatuses described above when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limited thereto; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and they should be included in the protection scope of the present invention.
Claims (9)
1. A track circuit testing method, characterized in that it is applied to a track circuit testing system, the track circuit testing system comprising:
the device comprises a signal preprocessing unit, a sampling unit and a calculating unit;
the output end of the signal preprocessing unit is electrically connected with the input end of the sampling unit, and the output end of the sampling unit is electrically connected with the input end of the calculating unit;
when two input ends of the signal preprocessing unit respectively input the waveform of the track power supply and the waveform of the local power supply, the output end of the signal preprocessing unit outputs a product waveform, wherein the product waveform is the product waveform of the track power supply and the waveform of the local power supply;
The sampling unit samples the signal waveform output by the output end of the signal preprocessing unit to obtain a plurality of sampling data, and the computing unit outputs data indicating a track power supply state and a local power supply state according to the plurality of sampling data and the track circuit testing method;
the track circuit testing method comprises the following steps:
acquiring a plurality of sampling data, wherein the sampling data are obtained by sampling based on a signal waveform output by an output end of the signal preprocessing unit;
determining the frequency of the signal waveform by means of multiple data slipping and comparison according to the multiple sampling data;
determining the amplitude value and the direct current component value of the signal waveform according to the plurality of sampling data and the frequency of the signal waveform;
and determining the track power supply state and the local power supply state according to the amplitude value and the direct current component value of the signal waveform.
2. The track circuit testing method of claim 1, wherein said determining the frequency of the signal waveform by way of a plurality of data slips and comparisons based on the plurality of sampled data comprises:
obtaining the sampling quantity;
retrieving a first array from a first location in the plurality of sampled data according to the number of samples;
Sequentially taking out a plurality of second arrays in a sliding manner from a second position in the plurality of sampling data according to the sampling quantity, and determining an associated array representing the association of the plurality of second arrays with the first array according to the first array and the plurality of second arrays;
selecting the number with the largest value from the association array as a target association value;
determining a target interval according to the target association value, wherein the target interval is the difference between the position of the second array corresponding to the target association value and the first position;
adding the target interval into an interval array;
if the sampling number does not reach the sampling number limit value, adjusting the sampling number and jumping to the step of taking out a first array from a first position in the plurality of sampling data according to the sampling number;
otherwise, determining the period sampling number according to the interval array, wherein the period sampling number represents the number of sampling data in the signal waveform fluctuation period;
and determining the frequency of the signal waveform according to the period sampling number and the data sampling interval.
3. The track circuit testing method of claim 2, wherein sequentially taking out a plurality of second arrays in a sliding manner from a second position in the plurality of sampling data according to the sampling number, and determining an associated array characterizing an association of the plurality of second arrays with the first array according to the first array and the plurality of second arrays, comprises:
Retrieving a second array from a second location in the plurality of sampled data according to the number of samples;
determining a correlation value according to a first formula, a second array and the first array, wherein the first formula is as follows:
in the method, in the process of the invention,for the associated value +.>Is the +.>Data of->Is the +.>Data of->The total amount of data in the first array;
adding the association value into the association array;
and if the second position does not reach the end point of the sliding, adjusting the second position according to a preset sequence, and jumping to the step of taking out a second array from the second position in the plurality of sampling data according to the sampling quantity.
4. The track circuit testing method of claim 1, wherein said determining the amplitude and dc component values of the signal waveform from the plurality of sampled data and the frequency of the signal waveform comprises:
determining a periodic sampling number according to the plurality of sampling data and the frequency of the signal waveform, wherein the periodic sampling number represents the number of sampling data in the fluctuation period of the signal waveform;
extracting the data of the periodic sampling number from the plurality of sampling data to form a third array;
Determining the direct current component value according to a third formula and a plurality of elements in the third array, wherein the third formula is as follows:
in the method, in the process of the invention,is a direct current component value, +.>Third group +.>Data of->The total number of data in the third array;
determining the amplitude of the signal waveform according to a fourth formula, the direct current component value and the third array, wherein the fourth formula is as follows:
in the method, in the process of the invention,is the amplitude of the signal waveform.
5. The track circuit testing method of any one of claims 1-4, wherein the track power state and the local power state include a phase difference of the track power and the local power, and wherein determining the track power state and the local power state based on the magnitude and the dc component value of the signal waveform includes:
when the signal waveform is a product waveform, determining a phase difference between the track power supply and the local power supply according to a fifth formula, the amplitude of the signal waveform and the direct current component value, wherein the fifth formula is as follows:
in the method, in the process of the invention,is the phase difference between the track power supply and the local power supply, +.>Is an inverse cosine function>Is a direct current component value, +.>Is the amplitude of the signal waveform;
And when the signal waveform is a track power waveform or a local power waveform, determining an effective value of the track power or an effective value of the local power according to the amplitude of the signal waveform.
6. A track circuit testing system, comprising:
the device comprises a signal preprocessing unit, a sampling unit and a calculating unit;
the output end of the signal preprocessing unit is electrically connected with the input end of the sampling unit, and the output end of the sampling unit is electrically connected with the input end of the calculating unit;
when two input ends of the signal preprocessing unit respectively input the waveform of the track power supply and the waveform of the local power supply, the output end of the signal preprocessing unit outputs a product waveform, wherein the product waveform is the product waveform of the track power supply and the waveform of the local power supply;
the sampling unit samples the signal waveform output by the output end of the signal preprocessing unit to obtain a plurality of sampling data;
the computing unit outputting data indicating a track power supply state and a local power supply state according to the plurality of sampling data and the track circuit testing method according to any one of claims 1 to 5;
wherein the signal preprocessing unit includes: a first logarithmic circuit, a second logarithmic circuit, a first switch, a second switch, an addition circuit, and an exponential circuit;
The two ends of the first switch are respectively and electrically connected with the output end of the first logarithmic circuit and the first input end of the adding circuit, the two ends of the second switch are respectively and electrically connected with the output end of the second logarithmic circuit and the second input end of the adding circuit, and the output end of the adding circuit is electrically connected with the input end of the exponential circuit;
when the first switch and the second switch are both closed and the waveform of the track power supply and the waveform of the local power supply are input through the input end of the first logarithmic circuit and the input end of the second logarithmic circuit, the output end of the exponential circuit outputs the product waveform of the track power supply and the waveform of the local power supply.
7. A track circuit testing apparatus for implementing the track circuit testing method according to any one of claims 1 to 5, the track circuit testing apparatus comprising:
the sampling data acquisition module is used for acquiring a plurality of sampling data, wherein the sampling data are obtained by sampling based on a signal waveform output by the output end of the signal preprocessing unit;
the frequency determining module of the signal waveform is used for determining the frequency of the signal waveform in a mode of multiple data slipping and comparison according to the multiple sampling data;
The waveform characteristic extraction module is used for determining the amplitude value and the direct current component value of the signal waveform according to the plurality of sampling data and the frequency of the signal waveform;
the method comprises the steps of,
and the power state analysis module is used for determining the track power state and the local power state according to the amplitude value and the direct current component value of the signal waveform.
8. An electronic device comprising a memory and a processor, the memory having stored therein a computer program executable on the processor, characterized in that the processor, when executing the computer program, implements the steps of the method according to any of the preceding claims 1 to 5.
9. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any of the preceding claims 1 to 5.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9223448D0 (en) * | 1991-11-13 | 1992-12-23 | Kokusai Denshin Denwa Co Ltd | Apparatus for detection of non-modulated signal and frequency acquisition |
| JPH10178394A (en) * | 1996-10-14 | 1998-06-30 | Advantest Corp | Optical frequency automatically following system, optical phase synchronization following system, polarized wave following system and optical signal detecting circuit using the systems |
| CN102508021A (en) * | 2011-10-09 | 2012-06-20 | 北京机械设备研究所 | Power factor real-time monitoring method based on virtual instrument |
| CN106140592A (en) * | 2016-07-29 | 2016-11-23 | 宁波中物东方光电技术有限公司 | Digital ultrasonic generator and auto frequency locking method thereof |
| CN106291105A (en) * | 2016-09-12 | 2017-01-04 | 电子科技大学 | A kind of sweep generator based on digital zero intermediate frequency |
| CN107607860A (en) * | 2017-10-30 | 2018-01-19 | 上海工程技术大学 | A kind of hand-held track circuit testing device and method |
| CN109271133A (en) * | 2018-08-01 | 2019-01-25 | 南京中感微电子有限公司 | A kind of data processing method and system |
| CN209274617U (en) * | 2018-12-11 | 2019-08-20 | 北京和利时系统工程有限公司 | A kind of all-electronin phase-sensitive track circuits module |
| CN111722013A (en) * | 2020-06-24 | 2020-09-29 | 合肥工大高科信息科技股份有限公司 | Method and system for detecting 25hz phase-sensitive track circuit signal |
| CN111722137A (en) * | 2020-07-01 | 2020-09-29 | 重庆西南集成电路设计有限责任公司 | Micro-resistance test system based on four-wire method and digital anti-interference circuit |
| CN113589220A (en) * | 2021-09-13 | 2021-11-02 | 黑龙江省电工仪器仪表工程技术研究中心有限公司 | Single-phase program-controlled standard power source for detection of IR46 intelligent electric energy meter |
| CN214674493U (en) * | 2021-02-01 | 2021-11-09 | 惠州市新斯贝克动力科技有限公司 | Multi-port power supply circuit and power distribution circuit |
| CN116170319A (en) * | 2023-04-21 | 2023-05-26 | 石家庄科林电气股份有限公司 | Power dual-mode communication bandwidth option determining method, device, terminal and storage medium |
-
2023
- 2023-09-18 CN CN202311196232.4A patent/CN116930728B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9223448D0 (en) * | 1991-11-13 | 1992-12-23 | Kokusai Denshin Denwa Co Ltd | Apparatus for detection of non-modulated signal and frequency acquisition |
| JPH10178394A (en) * | 1996-10-14 | 1998-06-30 | Advantest Corp | Optical frequency automatically following system, optical phase synchronization following system, polarized wave following system and optical signal detecting circuit using the systems |
| CN102508021A (en) * | 2011-10-09 | 2012-06-20 | 北京机械设备研究所 | Power factor real-time monitoring method based on virtual instrument |
| CN106140592A (en) * | 2016-07-29 | 2016-11-23 | 宁波中物东方光电技术有限公司 | Digital ultrasonic generator and auto frequency locking method thereof |
| CN106291105A (en) * | 2016-09-12 | 2017-01-04 | 电子科技大学 | A kind of sweep generator based on digital zero intermediate frequency |
| CN107607860A (en) * | 2017-10-30 | 2018-01-19 | 上海工程技术大学 | A kind of hand-held track circuit testing device and method |
| CN109271133A (en) * | 2018-08-01 | 2019-01-25 | 南京中感微电子有限公司 | A kind of data processing method and system |
| CN209274617U (en) * | 2018-12-11 | 2019-08-20 | 北京和利时系统工程有限公司 | A kind of all-electronin phase-sensitive track circuits module |
| CN111722013A (en) * | 2020-06-24 | 2020-09-29 | 合肥工大高科信息科技股份有限公司 | Method and system for detecting 25hz phase-sensitive track circuit signal |
| CN111722137A (en) * | 2020-07-01 | 2020-09-29 | 重庆西南集成电路设计有限责任公司 | Micro-resistance test system based on four-wire method and digital anti-interference circuit |
| CN214674493U (en) * | 2021-02-01 | 2021-11-09 | 惠州市新斯贝克动力科技有限公司 | Multi-port power supply circuit and power distribution circuit |
| CN113589220A (en) * | 2021-09-13 | 2021-11-02 | 黑龙江省电工仪器仪表工程技术研究中心有限公司 | Single-phase program-controlled standard power source for detection of IR46 intelligent electric energy meter |
| CN116170319A (en) * | 2023-04-21 | 2023-05-26 | 石家庄科林电气股份有限公司 | Power dual-mode communication bandwidth option determining method, device, terminal and storage medium |
Non-Patent Citations (3)
| Title |
|---|
| 《Recent progress of triboelectric nanogenerator-based power management and information processing circuit》;Y. Zhou等;《Materials Today Sustainability》;全文 * |
| 《一种基于相关算法的轨道电压相位差检测法》;冉娜娜等;《铁路计算机应用》;全文 * |
| 基于Mackey-Glass混沌储备池计算的多波形识别;包秀荣;岳荷荷;殷洪玺;秦杰;;大连理工大学学报(第02期);全文 * |
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