CN113791280A - Detection method and device - Google Patents
Detection method and device Download PDFInfo
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- CN113791280A CN113791280A CN202111074783.4A CN202111074783A CN113791280A CN 113791280 A CN113791280 A CN 113791280A CN 202111074783 A CN202111074783 A CN 202111074783A CN 113791280 A CN113791280 A CN 113791280A
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Abstract
The invention provides a detection method and a device, comprising the following steps: the data processor acquires voltage data acquired by the voltage sensor and distance data acquired by the distance sensor, the first current sensor acquires first current data, and the second current sensor acquires second current data; the data processor processes based on the voltage data, the distance data, the first current data, and the second current data to determine an impedance parameter of a section in which the tuning region device is located. In the scheme, manual field detection is not needed, the detection device is connected with the track through the main body, and voltage data, distance data, first current data and second current data collected by the distance sensor, the voltage sensor, the first current sensor and the second current sensor are processed through a data processor in the detection device to obtain impedance parameters of a section where tuning area equipment is located. By means of the method, the condition that the impedance measurement result is inaccurate can be avoided, and the measurement efficiency can be improved.
Description
Technical Field
The present invention relates to the field of data processing technologies, and in particular, to a detection method and apparatus.
Background
The track circuit is a circuit system which is formed by taking a steel rail as a conductor, and when the equipment parameters of a tuning area in the track circuit are changed, the original parallel resonance relation can be influenced, so that the isolation effect of transmission signals between adjacent track circuits is reduced. The cross-area transmission of track circuit signals of adjacent sections is connected into the section in series to form adjacent section frequency interference, so that the running efficiency and the running safety of a train are influenced. Therefore, in the routine detection and maintenance work of the railway signal equipment, the impedance parameters of each equipment in the tuning area are detected.
Currently, maintenance personnel on site are required to perform rough measurements at multiple locations on the rail using dedicated measurement equipment frequency shift meters to determine the impedance parameters of the equipment in the tuning area. Because the efficiency of measurement by a manual mode is low, and the situation that the impedance measurement result is inaccurate easily occurs.
In view of this, how to avoid the situation that the impedance measurement result is inaccurate, and improving the measurement efficiency is an urgent problem to be solved at present.
Disclosure of Invention
In view of this, embodiments of the present invention provide a detection method and apparatus to solve the problems in the prior art that the measurement efficiency is low and the impedance measurement result is not accurate.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a first aspect of an embodiment of the present invention shows a detection method applied to a detection device, where the detection device is disposed on a main body, a distance sensor, a voltage sensor, a first current sensor, a second current sensor, and a data processor are disposed in the detection device, the data processor is respectively connected to the distance sensor, the voltage sensor, the first current sensor, and the second current sensor, and the detection device is connected to a track through the main body, and the method includes:
the data processor acquires voltage data, distance data, first current data and second current data, wherein the voltage data is the voltage data of each test point in a section where tuning area equipment is located and acquired by the voltage sensor, the distance data is the distance data of each test point in the section where the tuning area equipment is located and acquired by the distance sensor, the first current data is the first current data of the front end of the tuning area equipment and acquired by the first current sensor, and the second current data is the second current data of the rear end of the tuning area equipment and acquired by the second current sensor;
the data processor processes based on the voltage data, the distance data, the first current data, and the second current data to determine impedance parameters of a section in which the tuning region device is located, the impedance parameters including at least values and locations of polar impedance and zero impedance.
Optionally, the method further includes:
the data processor acquires current data acquired by the first current sensor and the second current sensor in real time;
when the data processor determines that current data acquired by the first current sensor and the second current sensor have a current difference, determining that a compensation capacitor exists;
the data processor processes the voltage data of the compensation capacitor and the current data of the compensation capacitor to obtain a capacitance value, the current data of the compensation capacitor is determined according to the current data collected by the first current sensor and the second current sensor, and the voltage data of the compensation capacitor is collected based on the voltage sensor.
Optionally, the method further includes:
and after the existence of the compensation capacitor is determined, the data processor acquires the position of the test point corresponding to the compensation capacitor acquired by the distance sensor.
Optionally, the determining that there is a current difference between the current data collected by the first current sensor and the current data collected by the second current sensor includes:
calculating a current difference corresponding to current data acquired by the first current sensor and the second current sensor;
judging whether the current difference corresponding to the current data acquired by the first current sensor and the second current sensor is zero or not;
if not, determining that a current difference exists in the current data acquired by the first current sensor and the second current sensor.
Optionally, the data processor performs processing based on the voltage data, the distance data, the first current data, and the second current data to determine an impedance parameter of a section in which the tuning area device is located, including:
for each test point in the section where the tuning area equipment is located, calculating a modulus of impedance of each test point based on the voltage data, the first current data and the second current data of the tuning area equipment;
sequencing the modes of the impedance of each test point;
determining the values of the pole impedance and the zero impedance and the test points corresponding to the pole impedance and the zero impedance based on the mode of the impedance of each test point after sequencing;
and determining the positions of the test points corresponding to the polar impedance and the zero impedance acquired by the distance sensor based on the distance parameters.
A second aspect of the embodiment of the present invention shows a detection device, the detection device is disposed on a main body, a distance sensor, a voltage sensor, a first current sensor, a second current sensor and a data processor are disposed in the detection device, the data processor is respectively connected to the distance sensor, the voltage sensor, the first current sensor and the second current sensor, and the detection device is connected to a track through the main body;
the data processor is configured to obtain voltage data, distance data, first current data and second current data, where the voltage data is voltage data of each test point in a section where a tuning area device is located, the voltage data is acquired by the voltage sensor, the distance data is distance data of each test point in the section where the tuning area device is located, the distance data is acquired by the distance sensor, the first current data is first current data of a front end of the tuning area device, the first current data is acquired by the first current sensor, and the second current data is second current data of a rear end of the tuning area device, the second current data is acquired by the second current sensor; and processing based on the voltage data, the distance data, the first current data and the second current data to determine impedance parameters of the section where the tuning area equipment is located, wherein the impedance parameters at least comprise values and positions of polar impedance and zero impedance.
Optionally, the data processor is further configured to: acquiring current data acquired by the first current sensor and the second current sensor in real time; when the current difference exists in the current data collected by the first current sensor and the second current sensor, determining that a compensation capacitor exists; and processing the voltage data and the current data of the compensation capacitor based on the voltage data and the current data of the compensation capacitor to obtain a capacitance value of the capacitor, wherein the current data of the compensation capacitor is determined according to the current data acquired by the first current sensor and the second current sensor, and the voltage data of the compensation capacitor is acquired based on the voltage sensor.
Optionally, the data processor is further configured to: and after the compensation capacitor is determined to exist, the data processor acquires the position of the test point corresponding to the compensation capacitor acquired by the distance sensor.
Optionally, the data processor that determines that there is a current difference between the current data acquired by the first current sensor and the current data acquired by the second current sensor is specifically configured to: calculating a current difference corresponding to current data acquired by the first current sensor and the second current sensor; judging whether the current difference corresponding to the current data acquired by the first current sensor and the second current sensor is zero or not; if not, determining that a current difference exists in the current data acquired by the first current sensor and the second current sensor.
Optionally, the data processor, which is configured to determine the impedance parameter of the section where the tuning area device is located based on the voltage data, the distance data, the first current data, and the second current data, is specifically configured to: for each test point in the section where the tuning area equipment is located, calculating a modulus of impedance of each test point based on the voltage data, the first current data and the second current data of the tuning area equipment; sequencing the modes of the impedance of each test point; determining the values of the pole impedance and the zero impedance and the test points corresponding to the pole impedance and the zero impedance based on the mode of the impedance of each test point after sequencing; and determining the positions of the test points corresponding to the polar impedance and the zero impedance acquired by the distance sensor based on the distance parameters.
Based on the detection method and the detection device provided by the embodiment of the invention, the detection device is applied to the detection device, the detection device is arranged on the main body, the detection device is internally provided with the distance sensor, the voltage sensor, the first current sensor, the second current sensor and the data processor, the data processor is respectively connected with the distance sensor, the voltage sensor, the first current sensor and the second current sensor, the detection device is connected with the track through the main body, and the method comprises the following steps: the data processor acquires voltage data, distance data, first current data and second current data, wherein the voltage data is acquired by a voltage sensor and is voltage data of each test point in a section where the tuning area equipment is located, the distance data is acquired by a distance sensor and is distance data of each test point in the section where the tuning area equipment is located, the first current data is first current data of the front end of the tuning area equipment acquired by the first current sensor, and the second current data is second current data of the rear end of the tuning area equipment acquired by the second current sensor; the data processor processes based on the voltage data, the distance data, the first current data, and the second current data to determine impedance parameters of a section in which the tuning zone device is located, the impedance parameters including at least values and positions of polar impedance and zero impedance. In the embodiment of the invention, manual field detection is not needed, the detection device is connected with the track through the main body, and the data processor in the detection device is used for processing the voltage data, the distance data, the first current data and the second current data collected by the distance sensor, the voltage sensor, the first current sensor and the second current sensor to obtain the impedance parameters of the section where the tuning area equipment is located. By means of the method, the condition that the impedance measurement result is inaccurate can be avoided, and the measurement efficiency can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a detection apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a track circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating current flow when measuring a tuning area device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the current flow when measuring the compensation capacitance according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart of a detection method according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of another detection method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
As known from the background art, due to the influence of the external environment, the compensation capacitor in the track circuit may have problems such as poor contact, thereby affecting the quality of the track circuit signal transmission, and the transmission distance and even the normal operation transmission efficiency of the train control system, and therefore, the compensation capacitor also needs to be detected regularly. At present, maintenance workers on site need to search for a compensation capacitor beside a rail, and a frequency shift meter is used for measuring voltage UC and current IC at two ends of the capacitor, so that the capacitance value of the capacitor is obtained through manual calculation. The efficiency of measurement by a manual mode is low, and the condition of inaccurate capacitance value of the capacitor is easy to occur.
Based on this, the detection apparatus shown in the embodiment of the present invention can detect not only the impedance of the tuning area device, but also the capacitance value of the compensation capacitor in the track circuit.
For convenience of understanding, terms appearing in the embodiments of the present invention are explained below:
track circuit: a circuit system formed by using a steel rail as a conductor forms an electrical short circuit by contacting a train wheel pair with the steel rail, and causes the electrical state change of a receiving end to realize the idle inspection of the occupied area of a section.
A tuning area: the circuit is distributed between adjacent track circuits, and by placing tuning area equipment (comprising 2 tuning matching units and 1 hollow coil), the electrical isolation of signals of adjacent track circuit sections is realized, and meanwhile, the electrical resonance of signals of the track circuit of the section is realized.
Compensation capacitance: when the length of the track circuit section is larger than 300 meters, a compensation capacitor is arranged to improve the transmission condition of track circuit signals on the steel rail line.
Referring to fig. 1, a schematic structural diagram of a detection apparatus according to an embodiment of the present invention is shown.
The detection device is arranged on the main body.
It should be noted that the main body may be an H-shaped bracket, wherein the length of the main bracket in the horizontal direction is consistent with the width of the steel rail.
Further, the present invention may be not only the H-shaped stent shown above, but also a stent with other shapes, and the embodiment of the present invention is not limited thereto.
In the embodiment of the present invention, the detection device is applied to the track circuit shown in fig. 2.
In fig. 2, the track circuit includes an adjacent section where the tuning area devices are located and a track circuit section.
At least one tuning area device exists in an adjacent section where the tuning area device is located, and the tuning area device comprises a tuning area matching unit and an air core coil; the track circuit section comprises a plurality of compensation capacitors connected in parallel.
In the concrete implementation, the H-shaped support is integrally placed on the two steel rails to be pushed and detected when the device is used.
The detection device is internally provided with a voltage sensor 11, a first current sensor 12, a second current sensor 13, a distance sensor 14 and a data processor 15.
The data processor 15 is connected to the distance sensor 14, the voltage sensor 11, the first current sensor 12 and the second current sensor 13, respectively.
In implementation, the first current sensor 12, the second current sensor 13 and the data processor 15 are placed at the right end of the bracket, wherein the first current sensor 12 and the second current sensor 13 are distributed at the head and the tail ends; the distance sensor 14 and the voltage sensor 11 are arranged at the left end of the bracket, and the relative horizontal position of the two positions is arranged between the first current sensor 12 and the second current sensor 13.
It should be noted that the first current sensor 12 is used for detecting current data at the front end of the test point, so as to perform non-contact acquisition on the rail current.
The second current sensor 13 is used for detecting current data at the rear end of the test point so as to perform non-contact acquisition on the current of the steel rail.
In the embodiment of the invention, when the detection device is pushed on the steel rail, the distance sensor 14, the voltage sensor 11, the first current sensor 12 and the second current sensor 13 collect data of detection points, and the data processor 15 is used for processing the data of the detection points.
It is understood that the test points are divided in advance according to the length of the track where the device to be tested is located in the track circuit, such as: the length of a track corresponding to tuning area equipment is divided into N parts in equal length, and each part of track corresponds to one test point.
And N is a positive integer greater than or equal to 1, and the value of N is set in advance according to the actual situation.
The data processor 15 acquires voltage data, distance data, first current data, and second current data.
The voltage data is voltage data of each test point in a section where the tuning area device is located, which is acquired by the voltage sensor 11, and the distance data is distance data of each test point in a section where the tuning area device is located, which is acquired by the distance sensor 14. The first current data is the first current data of the front end of the tuning area device acquired by the first current sensor 12, and the second current data is the second current data of the rear end of the tuning area device acquired by the second current sensor 13.
In a specific implementation, the voltage amplitude and the phase of the tuning area equipment in the section are acquired by the voltage sensor 11 in real time, that is, the rail surface voltage amplitude and the phase are accurately acquired and sent to the data processor 15; the distance sensor 14 collects distance data within the zone in which the tuning area device is located.
The first current sensor 12 collects amplitude and phase data of a first current at the front end of the tuning area equipment, namely, obtains a current I at the front side of a tuning matching unit in the tuning area equipment1(ii) a The second current sensor 13 collects the amplitude and phase data of the second current at the rear end of the tuning area device, that is, the current I at the rear side of the tuning matching unit in the tuning area device is obtained2As shown in fig. 3.
The data processor 15 processes based on the voltage data, the distance data, the first current data and the second current data to determine an impedance parameter of a section in which the tuning zone device is located.
It should be noted that the impedance parameters at least include the values and positions of the pole impedance and the zero impedance.
In an implementation, for each test point within a zone in which the tuner device is located, calculating a modulus of each test point impedance based on the voltage data, the first current data, and the second current data of the tuner device; sequencing the modes of the impedance of each test point; determining the values of the pole impedance and the zero impedance and the test points corresponding to the pole impedance and the zero impedance based on the mode of the impedance of each test point after sequencing; and determining the positions of the test points corresponding to the polar impedance and the zero impedance acquired by the distance sensor based on the distance parameters.
Specifically, for each test point in the section where the tuning area device is located, first, the voltage data U and the first current data I of each test point are used1And second current data I2And (4) inputting the formula (1) for calculation to obtain the impedance Zz of each test point.
The formula (1) is:
where Zz is the impedance of each test point, I1For tuning the current on the front side of the matching unit in a tuning-zone device, I2For the current on the back side of the tuning matching unit in the tuning section equipment, U is the voltage of each test point.
And substituting the impedance Zz of each test point obtained by the calculation of the formula (1) into a formula (2) to calculate so as to obtain the modulus of the impedance of each test point.
Formula (2):
where | Zz | is the modulus of the impedance of each test point and cos Δ θ is I1And I2The angle of the corresponding vector.
The data processor 15 then sequences the modulo high of the impedance of each test point in order of high to low. And according to the sorting sequence corresponding to the modulus of each test point impedance, taking the modulus of the test point impedance with the first sorting sequence as the value of the pole impedance, taking the modulus of the test point impedance with the first last sorting sequence as the value of the zero impedance, and recording the corresponding test point.
It should be noted that zero impedance refers to a corresponding impedance value for forming series resonance on the signals of the neighboring cells and realizing short circuit on the signals of the neighboring cells; the pole impedance is an impedance value for forming parallel resonance on the signal of the section and is used for reducing the attenuation of the electric insulation section on the signal of the section.
Finally, the position of the test point corresponding to the polar impedance relative to the starting point and the position of the test point corresponding to the zero impedance relative to the starting point are searched from the distance parameters collected by the distance sensor 14.
In the embodiment of the invention, manual field detection is not needed, the detection device is connected with the track through the main body, and the data processor in the detection device is used for processing the voltage data, the distance data, the first current data and the second current data collected by the distance sensor, the voltage sensor, the first current sensor and the second current sensor to obtain the impedance parameters of the section where the tuning area equipment is located. By means of the method, the condition that the impedance measurement result is inaccurate can be avoided, and the measurement efficiency can be improved.
Optionally, based on the detection device shown in the above embodiment of the present invention, the data processor 15 is further configured to obtain current data acquired by the first current sensor 12 and the second current sensor 13 in real time; calculating a current difference corresponding to current data acquired by the first current sensor 12 and the second current sensor 13; judging whether the current difference corresponding to the current data collected by the first current sensor 12 and the second current sensor 13 is zero; if not, when determining that there is a current difference between the current data collected by the first current sensor 12 and the current data collected by the second current sensor 13, determining that there is a compensation capacitance, that is, the first current data I collected by the first current sensor 12 is present1The second current data I collected by the second current sensor 13 is positioned at the front end of the compensation capacitor2At the back end of the compensation capacitor as shown in fig. 4. The data processor 15 processes the voltage data of the compensation capacitor and the current data of the compensation capacitor to obtain a capacitance value of the capacitor.
It should be noted that the current data of the compensation capacitor is determined according to the current data collected by the first current sensor 12 and the second current sensor 13, and is based on the voltage data of the compensation capacitor collected by the voltage sensor 11.
In the embodiment of the present invention, since the compensation capacitor is disposed in the track circuit section, the test points herein refer to the test points in the track circuit section, and the division and the detection sequence of the test points are the same as those of the test points in the tuning area device, which can be referred to each other.
In a specific implementation, the data processor 15 obtains the first current amplitude and the phase data of the current test point of the first current sensor 12 in real time; and acquiring second current amplitude and phase data of the current test point acquired by the second current sensor 13 in real time. And calculating current data collected by the first current sensor 12 and the second current sensor 13 aiming at the current test point, and determining the current difference of the test point. And judging whether the current difference of the test point is zero, if not, determining that the current difference exists in the current data acquired by the first current sensor 12 and the second current sensor 13, namely, the detection device passes through the compensation capacitor at the moment. The voltage amplitude and phase of the compensation capacitor acquired by the voltage sensor 11 are utilized. And processing the voltage data of the compensation capacitor and the current data of the compensation capacitor to obtain a capacitance value of the capacitor.
In the embodiment of the invention, in the circuit comprising the resistance capacitor and the inductor, the calculation formula (3) for calculating the impedance Z is as follows:
wherein, R is the resistance, X is the reactance, j is the impedance, U is the voltage, I is the current.
It should be noted that the reactance in a general circuit includes an inductive reactance XLwL and capacitive reactance XC1/(wC), where w is the signal frequency, L is the inductance, and C is the capacitance. When the detection device is pushed to pass through the compensation capacitor, only the capacitor exists in the current section of the track circuit, and the formula (3) can be converted into the formula (4).
Formula (4):
wherein w is the signal frequency, C is the capacitance of the capacitor, j is the impedance, XCIs capacitive reactance, ZCIs the capacitance value of the capacitor.
It can be understood that, the data processor 15 processes the voltage data of the compensation capacitor and the current data of the compensation capacitor to obtain the capacitance value of the capacitor by: calculating the current difference between the first current data and the second current data, i.e. the current I between the two ends of the compensation capacitor1、I2As current data of the compensation capacitor; the current detection point, i.e. the voltage data U of the compensation capacitor and the current data I of the compensation capacitor1-I2Substituting into equation (4) to obtain impedance ZC(ii) a Then, the impedance Z calculated by the formula (4) is calculated according to the cosine theoremCSubstituting into a formula (5) to perform modulus extraction; finally according to the impedance ZCSubstituting the modulus into the formula (6) to obtain the capacitance value of the capacitor.
Formula (5):
here, since the time difference Δ t at which the current value is zero is detected by the zero-crossing method and converted into the phase difference Δ θ, Δ θ is Δ θ — w Δ t. I is1、I2C is the capacitance value of the capacitor for compensating the current at two ends of the capacitor.
Formula (6):
wherein C is capacitance value of capacitor, I1、I2To compensate the current across the capacitor, Δ θ is w Δ t, U is the voltage data, and w is the signal frequency.
It should be noted that, when it is determined that the compensation capacitor exists at the test point, the voltage collected by the voltage sensor 11 is an effective voltage value, and the currents collected by the first current sensor 12 and the second current sensor 13 are also an effective current value.
Optionally, when it is determined that there is a current difference between the current data collected by the first current sensor 12 and the current data collected by the second current sensor 13, that is, when the detection device passes through the compensation capacitor, the distance from the current detection point to the starting point is detected by using the distance sensor 14.
In the embodiment of the invention, manual field detection is not needed, and the detection device is connected with the track through the main body so as to obtain current data acquired by the first current sensor and the second current sensor through the data processor in the detection device; when the current difference exists in the current data acquired by the first current sensor and the second current sensor, the existence of the compensation capacitor is determined; and processing the voltage data of the compensation capacitor and the current data of the compensation capacitor to obtain a capacitance value of the capacitor. By means of the method, the condition that the capacitance value of the capacitor is inaccurate can be avoided, and the measurement efficiency can be improved.
Corresponding to the detection device shown in the above embodiment of the present invention, the embodiment of the present invention also discloses a detection method, as shown in fig. 5, which is a schematic flow diagram of the detection method shown in the embodiment of the present invention, and the method includes:
s501: the data processor acquires voltage data, distance data, first current data, and second current data.
In step S501, the voltage data is voltage data of each test point in a section where the tuning area device is located, which is acquired by the voltage sensor, the distance data is distance data of each test point in the section where the tuning area device is located, which is acquired by the distance sensor, the first current data is first current data of the front end of the tuning area device, which is acquired by the first current sensor, and the second current data is second current data of the rear end of the tuning area device, which is acquired by the second current sensor.
It should be noted that the voltage data includes voltage amplitude and phase data, the first current data includes amplitude and phase data of the first current, and the second current data includes amplitude and phase data of the second current.
In the process of the concrete implementation step S501, the voltage amplitude and the phase of the tuning area device in the section are acquired by the voltage sensor in real time, that is, the amplitude and the phase of the rail surface voltage are accurately acquired and sent to the data processor; distance data in a section where tuning area equipment is located and acquired by a distance sensor; the method comprises the steps that a first current sensor collects amplitude and phase data of first current at the front end of tuning area equipment, namely current on the front side of a tuning matching unit in the tuning area equipment is obtained; and the second current sensor acquires the amplitude and phase data of a second current at the rear end of the tuning area equipment, namely, the current at the rear side of the tuning matching unit in the tuning area equipment is acquired.
It should be noted that, the steps of the distance sensor, the voltage sensor, the first current sensor, and the second current sensor, and the data processor processing data shown above are data acquisition and processing performed in sequence on each test point when the detection device is pushed on the steel rail, that is, data acquired by the test points are processed in sequence when the detection device is pushed on the steel rail.
It is understood that the test points are divided in advance according to the length of the track where the device to be tested is located in the track circuit, such as: the length of a track corresponding to tuning area equipment is divided into N parts in equal length, and each part of track corresponds to one test point.
And N is a positive integer greater than or equal to 1, and the value of N is set in advance according to the actual situation.
It should be noted that the distance data refers to the distance from the starting point according to each test point.
It should be further noted that the starting point is a starting point for the detection device to start to perform, and is pre-selected by the technician.
S502: a data processor processes based on the voltage data, the distance data, the first current data, and the second current data to determine an impedance parameter of a section in which the tuning region device is located.
In the process of step S502, the impedance parameters include at least the values and positions of the pole impedance and the zero impedance.
It should be noted that the process of specifically implementing step S502 includes the following steps:
s11: for each test point within the zone in which the tuner device is located, calculating a modulus for each test point based on the voltage data, the first current data, and the second current data for the tuner device.
In the process of implementing step S11, for each test point in the section where the tuning area device is located, first, the voltage data U and the first current data I of each test point are used1And second current data I2And (4) inputting the formula (1) for calculation to obtain the impedance Zz of each test point. And substituting the impedance Zz of each test point obtained by the calculation of the formula (1) into a formula (2) to calculate so as to obtain the modulus of the impedance of each test point.
S12: and sequencing the modulus of each test point impedance.
In the process of implementing step S12, the test points are sorted in the order of the modulus of the impedance of each test point from high to low.
S13: and determining the values of the pole impedance and the zero impedance and the test points corresponding to the pole impedance and the zero impedance based on the mode of the impedance of each test point after sorting.
In the process of implementing step S13 specifically, according to the sorting order corresponding to the modulus of each test point impedance, the modulus of the test point impedance with the first sorting order is used as the value of the pole impedance, the modulus of the test point impedance with the first last sorting order is used as the value of the zero impedance, and the corresponding test point is recorded.
It should be noted that zero impedance refers to a corresponding impedance value for forming series resonance on the signals of the neighboring cells and realizing short circuit on the signals of the neighboring cells; the pole impedance is an impedance value for forming parallel resonance on the signal of the section and is used for reducing the attenuation of the electric insulation section on the signal of the section.
S14: and determining the positions of the test points corresponding to the polar impedance and the zero impedance acquired by the distance sensor based on the distance parameters.
In the process of implementing S14 specifically, the position of the test point corresponding to the polar impedance with respect to the starting point and the position of the test point corresponding to the zero impedance with respect to the starting point are searched from the distance parameters acquired by the distance sensor.
In the embodiment of the invention, manual field detection is not needed, the detection device is connected with the track through the main body, and the data processor in the detection device is used for processing the voltage data, the distance data, the first current data and the second current data collected by the distance sensor, the voltage sensor, the first current sensor and the second current sensor to obtain the impedance parameters of the section where the tuning area equipment is located. By means of the method, the condition that the impedance measurement result is inaccurate can be avoided, and the measurement efficiency can be improved.
Based on the detection apparatus shown in fig. 5 in the above embodiment of the present invention, the detection apparatus shown in the embodiment of the present invention is further used for identifying a compensation capacitor, as shown in fig. 6, which is a schematic flow chart of another detection method shown in the embodiment of the present invention, and the method includes:
s601: and the data processor acquires the current data acquired by the first current sensor and the second current sensor in real time.
In the process of implementing the step S601 specifically, the data processor acquires the first current amplitude and the phase data of the current test point of the first current sensor in real time; and acquiring second current amplitude and phase data of the current test point acquired by the second current sensor in real time.
It should be noted that, because the compensation capacitor is disposed in the track circuit section, the test points herein refer to the test points in the track circuit section, and the division and the detection sequence of the test points are the same as those of the test points in the step S501, which can be referred to each other.
S602: and calculating a current difference corresponding to the current data acquired by the first current sensor and the second current sensor.
In the process of implementing step S602 specifically, current data collected by the first current sensor and the second current sensor is calculated for the current test point, and a current difference of the test point is determined.
S603: and judging whether the current difference corresponding to the current data acquired by the first current sensor and the second current sensor is zero, if not, determining that the current data acquired by the first current sensor and the second current sensor has the current difference, and executing the step S604, if so, determining that the detection device does not pass through the compensation capacitor.
In the process of implementing step S603 specifically, it is determined whether the current difference between the test points is zero, if not, it is determined that there is a current difference between the current data collected by the first current sensor and the current data collected by the second current sensor, that is, the detection device passes through the compensation capacitor, and step S604 is executed, if so, it is determined that the detection device does not pass through the compensation capacitor, and then the next test point is continuously advanced.
Optionally, when it is determined that a current difference exists between the current data collected by the first current sensor and the current data collected by the second current sensor, that is, when the detection device passes through the compensation capacitor, the distance from the current detection point to the starting point is detected by using the distance sensor.
S604: the presence of a compensation capacitance is determined.
S605: and the data processor processes the voltage data of the compensation capacitor and the current data of the compensation capacitor to obtain a capacitance value of the capacitor.
In step S605, the current data of the compensation capacitor is determined according to the current data collected by the first current sensor and the second current sensor, and the data processor is based on the voltage data of the compensation capacitor collected by the voltage sensor.
In the process of implementing step S605 specifically, the current difference between the first current data and the second current data, i.e. the current I between the two ends of the compensation capacitor, is calculated1、I2As current data of the compensation capacitor; based on voltage amplitude and phase data of the compensation capacitor acquired by the voltage sensor; the current detection point, i.e. the voltage data U of the compensation capacitor and the current data I of the compensation capacitor1-I2Substituting into equation (4) to obtain impedance ZC(ii) a Then, equation (4) is calculated according to the cosine theorem) Calculated impedance ZCSubstituting into a formula (5) to perform modulus extraction; finally according to the impedance ZCSubstituting the modulus into the formula (6) to obtain the capacitance value C of the capacitor.
In the embodiment of the invention, manual field detection is not needed, and the detection device is connected with the track through the main body so as to obtain current data acquired by the first current sensor and the second current sensor through the data processor in the detection device; when the current difference exists in the current data acquired by the first current sensor and the second current sensor, the existence of the compensation capacitor is determined; and processing the voltage data of the compensation capacitor and the current data of the compensation capacitor to obtain a capacitance value of the capacitor. By means of the method, the condition that the capacitance value of the capacitor is inaccurate can be avoided, and the measurement efficiency can be improved.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed 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 modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A detection method is characterized by being applied to a detection device, wherein the detection device is arranged on a main body, a distance sensor, a voltage sensor, a first current sensor, a second current sensor and a data processor are arranged in the detection device, the data processor is respectively connected with the distance sensor, the voltage sensor, the first current sensor and the second current sensor, the detection device is connected with a track through the main body, and the method comprises the following steps:
the data processor acquires voltage data, distance data, first current data and second current data, wherein the voltage data is the voltage data of each test point in a section where tuning area equipment is located and acquired by the voltage sensor, the distance data is the distance data of each test point in the section where the tuning area equipment is located and acquired by the distance sensor, the first current data is the first current data of the front end of the tuning area equipment and acquired by the first current sensor, and the second current data is the second current data of the rear end of the tuning area equipment and acquired by the second current sensor;
the data processor processes based on the voltage data, the distance data, the first current data, and the second current data to determine impedance parameters of a section in which the tuning region device is located, the impedance parameters including at least values and locations of polar impedance and zero impedance.
2. The method of claim 1, further comprising:
the data processor acquires current data acquired by the first current sensor and the second current sensor in real time;
when the data processor determines that current data acquired by the first current sensor and the second current sensor have a current difference, determining that a compensation capacitor exists;
the data processor processes the voltage data of the compensation capacitor and the current data of the compensation capacitor to obtain a capacitance value, the current data of the compensation capacitor is determined according to the current data collected by the first current sensor and the second current sensor, and the voltage data of the compensation capacitor is collected based on the voltage sensor.
3. The method of claim 2, further comprising:
and after the existence of the compensation capacitor is determined, the data processor acquires the position of the test point corresponding to the compensation capacitor acquired by the distance sensor.
4. The method of claim 2, wherein said determining that there is a current difference in the current data collected by the first current sensor and the second current sensor comprises:
calculating a current difference corresponding to current data acquired by the first current sensor and the second current sensor;
judging whether the current difference corresponding to the current data acquired by the first current sensor and the second current sensor is zero or not;
if not, determining that a current difference exists in the current data acquired by the first current sensor and the second current sensor.
5. The method of claim 1, wherein the data processor processes based on the voltage data, the distance data, the first current data, and the second current data to determine an impedance parameter of a section in which the tuning region device is located, comprising:
for each test point in the section where the tuning area equipment is located, calculating a modulus of impedance of each test point based on the voltage data, the first current data and the second current data of the tuning area equipment;
sequencing the modes of the impedance of each test point;
determining the values of the pole impedance and the zero impedance and the test points corresponding to the pole impedance and the zero impedance based on the mode of the impedance of each test point after sequencing;
and determining the positions of the test points corresponding to the polar impedance and the zero impedance acquired by the distance sensor based on the distance parameters.
6. A detection device is characterized in that the detection device is arranged on a main body, a distance sensor, a voltage sensor, a first current sensor, a second current sensor and a data processor are arranged in the detection device, the data processor is respectively connected with the distance sensor, the voltage sensor, the first current sensor and the second current sensor, and the detection device is connected with a track through the main body;
the data processor is configured to obtain voltage data, distance data, first current data and second current data, where the voltage data is voltage data of each test point in a section where a tuning area device is located, the voltage data is acquired by the voltage sensor, the distance data is distance data of each test point in the section where the tuning area device is located, the distance data is acquired by the distance sensor, the first current data is first current data of a front end of the tuning area device, the first current data is acquired by the first current sensor, and the second current data is second current data of a rear end of the tuning area device, the second current data is acquired by the second current sensor; and processing based on the voltage data, the distance data, the first current data and the second current data to determine impedance parameters of the section where the tuning area equipment is located, wherein the impedance parameters at least comprise values and positions of polar impedance and zero impedance.
7. The apparatus of claim 6, wherein the data processor is further configured to: acquiring current data acquired by the first current sensor and the second current sensor in real time; when the current difference exists in the current data collected by the first current sensor and the second current sensor, determining that a compensation capacitor exists; and processing the voltage data and the current data of the compensation capacitor based on the voltage data and the current data of the compensation capacitor to obtain a capacitance value of the capacitor, wherein the current data of the compensation capacitor is determined according to the current data acquired by the first current sensor and the second current sensor, and the voltage data of the compensation capacitor is acquired based on the voltage sensor.
8. The apparatus of claim 7, wherein the data processor is further configured to: and after the compensation capacitor is determined to exist, the data processor acquires the position of the test point corresponding to the compensation capacitor acquired by the distance sensor.
9. The apparatus of claim 7, wherein the data processor configured to determine that there is a current difference between the current data collected by the first current sensor and the second current sensor is specifically configured to: calculating a current difference corresponding to current data acquired by the first current sensor and the second current sensor; judging whether the current difference corresponding to the current data acquired by the first current sensor and the second current sensor is zero or not; if not, determining that a current difference exists in the current data acquired by the first current sensor and the second current sensor.
10. The apparatus according to claim 6, wherein the data processor for determining the impedance parameter of the section of the tuning zone device based on the processing of the voltage data, the distance data, the first current data and the second current data is configured to: for each test point in the section where the tuning area equipment is located, calculating a modulus of impedance of each test point based on the voltage data, the first current data and the second current data of the tuning area equipment; sequencing the modes of the impedance of each test point; determining the values of the pole impedance and the zero impedance and the test points corresponding to the pole impedance and the zero impedance based on the mode of the impedance of each test point after sequencing; and determining the positions of the test points corresponding to the polar impedance and the zero impedance acquired by the distance sensor based on the distance parameters.
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| CN110618348A (en) * | 2019-07-02 | 2019-12-27 | 西南交通大学 | Parameter estimation and fault diagnosis method for detecting compensation capacitor of non-insulated track circuit |
| CN214041567U (en) * | 2020-08-28 | 2021-08-24 | 无锡特力堡电气有限公司 | Detection device for passive filter compensation device under live operation of inductance and capacitance value |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618348A (en) * | 2019-07-02 | 2019-12-27 | 西南交通大学 | Parameter estimation and fault diagnosis method for detecting compensation capacitor of non-insulated track circuit |
| CN214041567U (en) * | 2020-08-28 | 2021-08-24 | 无锡特力堡电气有限公司 | Detection device for passive filter compensation device under live operation of inductance and capacitance value |
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