CN107315113B - Railway ballast resistance detection device and railway ballast resistance detection method - Google Patents
Railway ballast resistance detection device and railway ballast resistance detection method Download PDFInfo
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- CN107315113B CN107315113B CN201710552941.XA CN201710552941A CN107315113B CN 107315113 B CN107315113 B CN 107315113B CN 201710552941 A CN201710552941 A CN 201710552941A CN 107315113 B CN107315113 B CN 107315113B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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Abstract
The invention discloses a ballast resistance detection device, which comprises a current acquisition unit, a distance measurement unit and a control processing unit, wherein the current acquisition unit is used for acquiring a current; the output end of the current acquisition unit is connected with the first input end of the control processing unit, the output end of the distance measurement unit is connected with the second input end of the control processing unit, the current acquisition unit, the distance detection unit and the control processing unit all comprise signal transmission units, and the current acquisition unit is used for acquiring the magnitude value of the current flowing through the steel rail; the distance measuring unit is used for detecting the length value of the steel rail to be detected; the control processing unit is used for controlling the switches of the current acquisition unit and the distance measurement unit and processing and calculating the acquired numerical values; and the signal transmission unit is used for data transmission among the units. The method has the advantages of simple model, accurate calculation and capability of accurately, simply and conveniently measuring the ballast resistance.
Description
Technical Field
The invention relates to the technical field of railway detection, in particular to a ballast resistance detection device and a ballast resistance detection method.
Background
Due to various reasons such as weather, climate and the like, a track bed of a railway track has certain resistance, and when the resistance exceeds a certain range, the leakage current is serious, normal signals are weakened, and the driving safety is affected. The conventional ballast resistance measuring method generally comprises two methods, one method is an off-line measuring method by a double short circuit method or an open short circuit method, the method has the disadvantages of complicated steps, time and labor waste, more used equipment, inconvenience in carrying, high requirement on measuring conditions and difficulty in implementation; the other method is that under the shunt state of a track circuit, the current of a steel rail at a shunt point is induced through a current sensing coil, the induced voltage amplitude envelope is calculated, then a regression model of the induced voltage envelope and the ballast resistance is established, and the ballast resistance value is estimated according to the model relation.
Disclosure of Invention
The invention aims to solve the technical problem of how to provide a device and a method for simply, conveniently and accurately measuring the railway ballast resistance.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a railway ballast resistance detection device: the device comprises a current acquisition unit, a distance measurement unit and a control processing unit; the output of current acquisition unit with control processing unit's first input is connected, distance measurement unit's output with control processing unit's second input is connected, current acquisition unit, distance detection unit reaches control processing unit all includes signal transmission unit, wherein:
the current acquisition unit is used for acquiring the magnitude value of the current flowing through the steel rail;
the distance measuring unit is used for detecting the length value of the steel rail to be detected;
the control processing unit is used for controlling the switches of the current acquisition unit and the distance measurement unit, and processing and calculating the acquired numerical values, and the control processing unit is used for:b ═ α, propagation coefficientCalculating the resistance value of the railway ballast; alpha is the real part of the propagation coefficient, beta is the imaginary part of the propagation coefficient, R is the resistance of the steel rail, L is the inductance of the steel rail, C is the capacitance between the rails, and G is the admittance of the track bed resistance;
and the signal transmission unit is used for data transmission among the units.
Preferably: the ballast resistor monitoring device is characterized by further comprising a display unit, wherein the input end of the display unit is connected with the display end of the control processing unit and used for displaying the data acquired by the current acquisition unit and the distance measurement unit and the ballast resistor value calculated by the control processing unit.
Preferably: the input end of the storage unit is connected with the storage end of the control processing unit and used for storing the numerical values of the current, the length and the resistance.
Preferably: the output end of the power supply unit is connected with the power supply ends of the current acquisition unit, the distance measurement unit and the control processing unit respectively and supplies power.
Preferably: the input end of the wireless communication unit is connected with the communication end of the control processing unit and used for sending the calculated ballast resistance value to an intelligent terminal of a user.
The invention also provides a ballast resistance detection method, which comprises the following steps:
step 1: detecting a current value I along the railway ballast;
step 2: detecting the length value X of the railway ballast;
step 3, establishing a model, equally dividing the steel rail into infinite segments, wherein each segment of the steel rail comprises a steel rail resistor R, a steel rail inductor L, an inter-rail capacitor C and an admittance G of a track bed resistor, the steel rail resistor is connected with the steel rail inductor in series, the inter-rail capacitor is connected with the admittance of the track bed resistor in parallel, and the inter-rail capacitor and the admittance of the track bed resistor are connected between the two steel rails;
and 4, step 4: establishing a ballast bed resistance analytic expression formula of which unknown quantity is the distance along the line and the current value:b ═ α, propagation coefficientAlpha is the real part of the propagation coefficient, and beta is the imaginary part of the propagation coefficient;
and 5: and substituting the steel rail resistance R, the steel rail inductance L, the inter-rail capacitance C, the measured distance X and the measured current value I into the formula, and calculating the admittance value G, wherein the resistance value of the railway ballast is the reciprocal of the admittance value G.
Preferably: the method for detecting the ballast resistance further comprises the following steps of 6: and displaying the calculated ballast resistance value through a display unit.
Preferably: the method for detecting the ballast resistance further comprises the following steps of 7: and storing the calculated ballast resistance value in a storage unit.
Preferably: the method for detecting the ballast resistance further comprises the following step 8: and sending the calculated ballast resistance to a mobile intelligent terminal of a user through a wireless communication unit so as to be checked by the user.
By adopting the technical scheme, the current collecting unit is used for collecting the current value flowing through the steel rail to be detected, the distance measuring unit is used for detecting the length value of the steel rail to be detected, the signal transmission unit contained in the distance measuring unit is used for transmitting the detected signal to the control processing unit, and the control processing unit calculates the value of the ballast resistance according to the prestored model formula. The method has the advantages of simple required components, and accurate and quick calculation of the ballast resistance.
Drawings
FIG. 1 is a schematic diagram of a ballast resistance detection device according to the present invention;
FIG. 2 is a flow chart of the ballast resistance detection method of the present invention;
fig. 3 is a schematic view of a rail model according to the present invention.
In the figure, 100-a current acquisition unit, 200-a distance measurement unit, 300-a control processing unit, 400-a signal transmission unit, 500-a display unit, 600-a storage unit and 700-a wireless communication unit. R-rail resistance, L-rail inductance, C-inter-rail capacitance and G-admittance.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, a ballast resistance detection device: comprises a current acquisition unit 100, a distance measurement unit 200 and a control processing unit 300; the output of current collection unit 100 is connected with the first input of control processing unit 300, and the output of distance measurement unit 200 is connected with the second input of control processing unit 300, and current collection unit 100, distance detection unit 200 and control processing unit 300 all include signal transmission unit 400, wherein:
the current collecting unit 100 is used for collecting the magnitude value of the current flowing through the steel rail;
the distance measuring unit 200 is used for detecting the length value of the steel rail to be detected;
the control processing unit 300 is configured to control the switches of the current collecting unit 100 and the distance measuring unit 200, and perform processing calculation on the collected values, according to a formula:b ═ α, propagation coefficientCalculating the resistance value of the railway ballast; alpha is the real part of the propagation coefficient, beta is the imaginary part of the propagation coefficient, R is the resistance of the steel rail, L is the inductance of the steel rail, C is the capacitance between the rails, and G is the admittance of the track bed resistance;
and a signal transmission unit 400 for data transmission between the units.
According to the invention, the current acquisition unit 100 is adopted to acquire the magnitude value of the current flowing through the steel rail to be detected, the distance measurement unit 200 is used to detect the length value of the steel rail to be detected, the detected new type is sent to the control processing unit 300 through the signal transmission unit 400, and the control processing unit 300 calculates the value of the ballast resistance according to the pre-stored model formula. The method has the advantages of simple required components, and accurate and quick calculation of the ballast resistance.
Specifically, the method comprises the following steps: the ballast resistance monitoring device further comprises a display unit 500, wherein the input end of the display unit 500 is connected with the display end of the control processing unit 300 and is used for displaying data acquired by the current acquisition unit 100 and the distance measurement unit 200 and controlling the ballast resistance value calculated by the processing unit 300.
Specifically, the method comprises the following steps: the circuit also comprises a storage unit 600, wherein the input end of the storage unit 600 is connected with the storage end of the control processing unit 300 and is used for storing the values of the current, the length and the resistance.
Specifically, the method comprises the following steps: the device further comprises a power supply unit, wherein the output end of the power supply unit is respectively connected with the power supply ends of the current acquisition unit 100, the distance measurement unit 200 and the control processing unit 300 and supplies power.
Specifically, the method comprises the following steps: the ballast resistance monitoring system further comprises a wireless communication unit 700, wherein the input end of the wireless communication unit 700 is connected with the communication end of the control processing unit 300 and is used for sending the calculated ballast resistance value to the intelligent terminal of a user.
As shown in fig. 2 and 3, the invention further provides a ballast resistance detection method, which includes the steps of:
s10, step 1: detecting a current value I along the railway ballast;
s20 step 2: detecting the length value X of the railway ballast;
s30, establishing a model, equally dividing the steel rail into infinite segments, wherein each segment of the steel rail comprises a steel rail resistor R, a steel rail inductor L, an inter-rail capacitor C and an admittance G of a track bed resistor, the steel rail resistor is connected with the steel rail inductor in series, the inter-rail capacitor is connected with the admittance of the track bed resistor in parallel, and the inter-rail capacitor and the admittance of the track bed resistor are connected between the two steel rails;
s40 step 4: establishing a ballast bed resistance analytic expression formula of which unknown quantity is the distance along the line and the current value:b ═ α, propagation coefficientAlpha is the real part of the propagation coefficient, and beta is the imaginary part of the propagation coefficient;
s50 step 5: and substituting the steel rail resistance R, the steel rail inductance L, the inter-rail capacitance C, the measured distance X and the measured current value I into the formula, and calculating the admittance value G, wherein the resistance value of the railway ballast is the reciprocal of the admittance value G.
It should be noted that, where R is a rail resistance, L is a rail inductance, C is an inter-rail capacitance, and G is an admittance of a track bed resistance, there is a formula:
characteristic impedance
Propagation coefficient
Where α is the real part of the propagation coefficient and β is the imaginary part
The voltage, current at location x can be written as:
where Z0 is the characteristic impedance and ZL is the terminal load, the impedance matching, i.e. ZL — Z0, has the following formula:
I(x)＝ILeccxejβx ⑤
|I(x)|＝ILeccx ⑥
taking ln as the formula
I′＝ln(|I(x)|)＝ln(IL)+αx ⑦
It can be seen that the current amplitude | I (x) | measured along the line, I' after ln, is proportional to the distance x, and the slope is α. Alpha is the real part of gamma in the formula.
Obtaining a current value I and a distance length value x along the line through measurement;
the capacitance between the steel rails is not uniformly distributed, compensation capacitance exists at fixed intervals, the current at the capacitance has sudden change, the curve of I' and x is not ideal and linear fitting needs to be carried out on the curve, and the slope b is obtained:
according to the second step, get
In the above formula, rail resistance R, rail inductance L, capacitance C (because compensation capacitance is greater than the capacitance between the rails far away, so can think that the capacitance is compensation capacitance C) are all known, and b obtains through measurement calculation, through calculating, obtains the admittance G of ballast bed resistance, and then obtains the reciprocal of ballast bed resistance for the admittance of ballast bed resistance: and Rd is 1/G.
Specifically, the method comprises the following steps: the method for detecting the ballast resistance further comprises the step S60 of step 6: and displaying the calculated ballast resistance value through a display unit.
Specifically, the method comprises the following steps: the method for detecting the ballast resistance further comprises the step S70 of step 7: and storing the calculated ballast resistance value in a storage unit.
Specifically, the method comprises the following steps: the method for detecting the ballast resistance further comprises the step S80: and sending the calculated ballast resistance to a mobile intelligent terminal of a user through a wireless communication unit so as to be checked by the user.
According to the technical scheme, data acquisition and calculation are carried out on a steel rail through a current acquisition unit, a distance measurement unit and a control processing unit, the steel rail is divided into infinite segments, each segment of the steel rail comprises a steel rail resistor R, a steel rail inductor L, an inter-rail capacitor C and an admittance G of a track bed resistor, the steel rail resistor is connected with the steel rail inductor in series, the inter-rail capacitor is connected with the admittance of the track bed resistor in parallel, and the inter-rail capacitor and the admittance of the track bed resistor are connected between the two steel rails; by model formulab ═ α, propagation coefficientAnd calculating the value of the ballast resistance. The method has the advantages of simple established model, fewer steps and accurate calculation, and is beneficial to the practical calculation and application of the ballast resistance.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (9)
1. The utility model provides a railway ballast resistance detection device which characterized in that: the device comprises a current acquisition unit, a distance measurement unit and a control processing unit; the output of current acquisition unit with control processing unit's first input is connected, distance measurement unit's output with control processing unit's second input is connected, current acquisition unit, distance detection unit reaches control processing unit all includes signal transmission unit, wherein:
the current acquisition unit is used for acquiring the magnitude value of the current flowing through the steel rail;
the distance measuring unit is used for detecting the length value of the steel rail to be detected;
the control processing unit is used for controlling the switches of the current acquisition unit and the distance measurement unit, and processing and calculating the acquired numerical values, and the control processing unit is used for:b ═ α, propagation coefficientCalculating the resistance value of the railway ballast, wherein alpha is the real part of the propagation coefficient, beta is the imaginary part of the propagation coefficient, R is the steel rail resistance, L is the steel rail inductance, C is the inter-rail capacitance, and G is the admittance of the track bed resistance;
and the signal transmission unit is used for data transmission among the units.
2. The ballast resistance detection device according to claim 1, characterized in that: the ballast resistor monitoring device is characterized by further comprising a display unit, wherein the input end of the display unit is connected with the display end of the control processing unit and used for displaying the data acquired by the current acquisition unit and the distance measurement unit and the ballast resistor value calculated by the control processing unit.
3. The ballast resistance detection device according to claim 2, characterized in that: the input end of the storage unit is connected with the storage end of the control processing unit and used for storing the numerical values of the current, the length and the resistance.
4. The ballast resistance detection device according to claim 1, characterized in that: the output end of the power supply unit is connected with the power supply ends of the current acquisition unit, the distance measurement unit and the control processing unit respectively and supplies power.
5. The ballast resistance detection device according to claim 1, characterized in that: the input end of the wireless communication unit is connected with the communication end of the control processing unit and used for sending the calculated ballast resistance value to an intelligent terminal of a user.
6. A ballast resistance detection method is characterized by comprising the following steps:
step 1: detecting a current value I along the railway ballast;
step 2: detecting the length value X of the railway ballast;
step 3, establishing a model, equally dividing the steel rail into infinite segments, wherein each segment of the steel rail comprises a steel rail resistor R, a steel rail inductor L, an inter-rail capacitor C and an admittance G of a track bed resistor, the steel rail resistor is connected with the steel rail inductor in series, the inter-rail capacitor is connected with the admittance of the track bed resistor in parallel, and the inter-rail capacitor and the admittance of the track bed resistor are connected between the two steel rails;
and 4, step 4: establishing a ballast bed resistance analytic expression formula of which unknown quantity is the distance along the line and the current value:b ═ α, propagation coefficientAlpha is the real part of the propagation coefficient, and beta is the imaginary part of the propagation coefficient;
step 5: and substituting the steel rail resistance R, the steel rail inductance L, the inter-rail capacitance C, the measured distance X and the measured current value I into the formula, and calculating the admittance value G, wherein the resistance value of the railway ballast is the reciprocal of the admittance value G.
7. The ballast resistance detection method according to claim 6, characterized in that: further comprising the step 6: and displaying the calculated ballast resistance value through a display unit.
8. The ballast resistance detection method according to claim 7, characterized in that: further comprising step 7: and storing the calculated ballast resistance value in a storage unit.
9. The ballast resistance detection method according to claim 6, characterized in that: further comprising the step 8: and sending the calculated ballast resistance to a mobile intelligent terminal of a user through a wireless communication unit so as to be checked by the user.
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| CN112550352B (en) * | 2020-08-19 | 2022-09-23 | 中铁第四勘察设计院集团有限公司 | Track circuit capable of self-adapting to ballast resistor and adjusting method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196543A (en) * | 2007-12-13 | 2008-06-11 | 张兴杰 | On-line measurement method for electric resistance of rail traffic road bed |
| CN201110870Y (en) * | 2007-12-13 | 2008-09-03 | 张兴杰 | Rail traffic road bed resistor on-line measuring apparatus |
| CN102323484A (en) * | 2011-08-15 | 2012-01-18 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Accurate measurement and calculation method for parameters of power transmission line |
| CN102854387A (en) * | 2012-08-20 | 2013-01-02 | 浙江师范大学 | Method for testing leakage admittance between rails of uninsulated audio frequency track circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3292884B2 (en) * | 1990-12-27 | 2002-06-17 | 株式会社日立製作所 | Ground fault distance detecting method, ground fault distance detecting device, and ground fault distance relay |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196543A (en) * | 2007-12-13 | 2008-06-11 | 张兴杰 | On-line measurement method for electric resistance of rail traffic road bed |
| CN201110870Y (en) * | 2007-12-13 | 2008-09-03 | 张兴杰 | Rail traffic road bed resistor on-line measuring apparatus |
| CN102323484A (en) * | 2011-08-15 | 2012-01-18 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Accurate measurement and calculation method for parameters of power transmission line |
| CN102854387A (en) * | 2012-08-20 | 2013-01-02 | 浙江师范大学 | Method for testing leakage admittance between rails of uninsulated audio frequency track circuit |
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