CN110631753A - Online monitoring and early warning system and method for contact line tension of catenary of railway contact network - Google Patents
Online monitoring and early warning system and method for contact line tension of catenary of railway contact network Download PDFInfo
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- CN110631753A CN110631753A CN201810657225.2A CN201810657225A CN110631753A CN 110631753 A CN110631753 A CN 110631753A CN 201810657225 A CN201810657225 A CN 201810657225A CN 110631753 A CN110631753 A CN 110631753A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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Abstract
The invention relates to a railway contact net carrier cable contact line tension on-line monitoring and early warning system and a method thereof, wherein the monitoring system comprises a tension acquisition device, a data center station and a monitoring terminal; the tension collecting device comprises a side pressure type tension sensor, a microprocessor module, a power supply module and a device structure shell. The tension collecting device is arranged on a catenary (or a contact line) of the contact network, can directly obtain the tension value of the catenary (or the contact line) and sends a fault diagnosis result to operation and maintenance personnel. The side pressure type tension sensor with large power consumption is controlled by hardware to realize periodic tension value acquisition and reduce the sending amount of wireless transmission of service data, and the system power consumption of the tension acquisition device is greatly reduced. The device has simple structure and light weight, can directly measure the tension value of the carrier cable (or the contact wire), solves the problems that the installation mode is inconvenient, the clamping stagnation fault of the contact net tension compensation device cannot be diagnosed, the power supply reliability is poor and the like in the prior art, and has stronger engineering application value.
Description
Technical Field
The invention relates to the technical field related to tension monitoring, in particular to an on-line monitoring and early warning system and method for catenary contact line tension of a railway contact network, which are mainly applied to real-time monitoring, diagnosis and fault early warning of catenary contact line tension of the railway contact network.
Background
In order to ensure the safe operation of the electrified railway, the contact line and the locomotive pantograph are required to be kept in stable and uninterrupted contact current collection, so that the tension of a cable of the contact line system is required to be kept in a stable state all the time. Because the contact net works in a severe field environment, the change of the outside air temperature can influence the working state of the contact line, and the huge impact force of the train on the contact net during passing can directly change the carrier cable and the contact line tension of the contact net, which can cause the reduction of the current collection quality, easily cause the pantograph-catenary failure and damage the safe operation of the contact net.
At present, the electrified railway in China adopts a contact net tension compensation device to automatically compensate the tension of a contact net carrier cable and the tension of a contact line so as to keep the tension of the contact net relatively constant. If the tension compensation device of the contact net is blocked, the weight is stolen or the quality is poor, the tension of a cable of the contact net is too large or too small. When the tension is too large, a broken line accident is easy to occur, if a train passes through a broken line position, the broken line is wound on the train, so that the fault range is expanded if the train is light, and the contact net support column is deformed or broken if the train is heavy, and even the train is off; when the tension is too low, the sag of the contact line becomes large, the accurate current collection between the bow nets is adversely affected, and the contact line is easily seriously abraded and reaches the service period too early. Therefore, the real-time monitoring of the tension of the contact network and the fault early warning are of great significance for guaranteeing the safe operation of the railway.
The utility model discloses a patent application number is 201320854397.1's utility model discloses a contact net tension measurement system, include and carry out the measuring sensing device who measures to contact net tension, this measuring sensing device installs the lower anchor position at the contact wire of contact net and/or messenger, should measure sensing device and include insulating part and the connecting rod that the orientation of anchor position is down connected in order with contact wire and/or messenger, is provided with the wire clamp frame in the connecting rod, sets up measuring sensor in the position department that the wire clamp frame is connected with the connecting rod. Because the measuring and sensing device is arranged between the lower anchor position and the contact line rope, the contact line is required to be disconnected to connect the measuring and sensing device, the original contact network structure is damaged, the installation is unchanged, and great safety accidents are easily caused if the quality of the measuring and sensing device is poor. The invention patent with the patent application number of 201510036189.4 discloses a GPRS-based electrified railway cable tension monitoring system, which is applied to a power supply system contact network and comprises: the system comprises a plurality of cable tension monitoring terminals, a monitoring center and a mobile terminal, wherein each cable tension monitoring terminal is connected with the monitoring center and the mobile terminal. Since this patent does not disclose in detail the installation position of the tension sensor of the cable tension monitoring terminal and the tension testing principle, and also does not disclose information such as the structure of the cable tension monitoring terminal, it is difficult to realize commercialization according to the present patent publication. The utility model with the patent application number of 201620828264.0 discloses a contact net anchor section tension state monitoring device, which comprises a pillar, a control box and a contact net tension compensator, wherein the contact net tension compensator is adopted to weigh down a lump and install a reflecting plate, a laser probe is installed above the contact net tension compensator, the laser probe and the reflecting plate are correspondingly arranged, the laser probe is connected with the control box through a line, and the control box is provided with a power supply device; because it can't direct measurement contact net tension but measure and weigh the displacement of sticking together, so when contact net tension compensator takes place the jamming, can't diagnose and report to the police. In addition, when the solar power supply is adopted, the solar panel efficiency is greatly influenced by sunlight irradiation, and the system can not work normally due to insufficient energy easily in continuous rainy days.
In summary, the existing catenary tension monitoring technology mainly has the following problems: firstly, the original contact network cable structure needs to be damaged, and the field installation mode is inconvenient; secondly, the device based on the displacement measurement principle of the falling lump cannot diagnose the clamping stagnation fault of the contact net tension compensation device; thirdly, the solar power supply mode is greatly influenced by weather, and the system can not work normally due to power loss in continuous rainy weather.
Disclosure of Invention
The on-line monitoring and early warning system and method for the catenary contact wire tension of the railway contact network are provided to realize on-line monitoring and early warning of the catenary tension, aiming at the problems that the installation mode is inconvenient, the clamping stagnation fault of a catenary tension compensation device cannot be diagnosed, the power supply reliability is poor and the like in the existing catenary contact wire tension monitoring technology.
A railway contact net carrier cable contact line tension on-line monitoring and early warning system comprises a tension acquisition device, a data center station and a monitoring terminal; the tension acquisition device uploads the field data to the data center station, and the data center station processes and diagnoses the field data and sends a diagnosis result to the monitoring terminal; the tension acquisition device is connected with the data center station, and the data center station is connected with the monitoring terminal; the tension collecting device is arranged on a catenary and a contact line of the contact network, and comprises a side-pressure type tension sensor, a microprocessor module, a power supply module and a device structure shell; the side-pressing type tension sensor clamps the carrier cable or the contact wire, the microprocessor module comprises a transmitter, a singlechip, a power switch circuit and a GPRS wireless communication module, and the circuits are communicated; the output end of the side-pressure type tension sensor is electrically connected with the input end of the transmitter, the positive power supply input end of the power switch circuit is electrically connected with the positive power supply output end of the power module, the positive power supply output end of the power switch circuit is electrically connected with the positive power supply input end of the side-pressure type tension sensor, and the switch control end of the power switch circuit is electrically connected with the single chip microcomputer; the outer surface of the device structure shell is provided with a groove, and a solar cell panel is embedded in the groove; the side-pressure type tension sensor, the microprocessor module and the power supply module are fixed in a cavity of the device structure shell.
Preferably, the device structure shell comprises a cavity upper cover, a cavity lower cover and a bolt; the upper cover of the cavity is of a triangular prism structure with an opening at the bottom, the opening at the bottom of the upper cover of the cavity extends inwards to form a first connecting part, and two rectangular grooves in the middle of the upper cover of the cavity are embedded with solar panels; the lower cavity shell is of a semicircular structure with an opening at the upper part, and the opening of the lower cavity shell extends outwards to form a second connecting part; the centers of the upper cover and the lower shell of the cavity are provided with through holes which can pass through the carrier cable or the contact line; the first connecting portion and the second connecting portion are provided with corresponding threaded holes, and the bolt penetrates through the threaded holes of the first connecting portion and the second connecting portion to fixedly connect the cavity upper cover and the cavity lower shell.
Preferably, the cavity upper cover comprises an upper cover plate and a cavity upper cover body, and the upper cover plate is detachably in threaded connection with the cavity upper cover body through a screw; the cavity lower shell comprises a lower shell cover plate and a cavity lower shell body, and the lower shell cover plate is detachably in threaded connection with the cavity lower shell body through a screw; the cavity upper cover body is provided with two rectangular grooves for embedding the solar cell panel, the cavity upper cover body comprises a pressing strip, the solar cell panel is fixed in the rectangular grooves by the pressing strip, corresponding threaded holes are formed in the rectangular grooves of the bottom of the pressing strip and the cavity upper cover body, and the pressing strip is detachably connected with the cavity upper cover body in a threaded mode through screws.
Preferably, the lateral pressure type tension sensor comprises a clamping part, a structure body and a measuring element, wherein the clamping part is detachably connected with the structure body in a threaded manner; the structure body is provided with an arc-shaped guide groove through which a catenary (or a contact wire) passes, the clamping part clamps the catenary (or the contact wire) and enables the catenary to contact the surface of the arc-shaped guide groove of the structure body, and the measuring element senses tension change of the catenary (or the contact wire) and outputs an electric signal after circuit conversion.
Preferably, the power module comprises a solar panel, a charging module and a lithium battery; the solar cell panel is electrically connected with the charging module, and the charging module is electrically connected with the lithium battery.
Preferably, the single chip microcomputer performs data interaction with a data center station through a GPRS wireless communication module, the data center station performs data interaction with the monitoring terminal through the Internet, the monitoring terminal controls the working mode of the single chip microcomputer, and the monitoring terminal can perform remote system upgrade on the single chip microcomputer.
The method for monitoring the tension by using the online monitoring and early warning system for the catenary contact line tension of the railway contact network comprises the following steps:
s110: the tension acquisition device detects and receives a tension acquisition time interval value, a working condition packet number and a tension alarm threshold instruction parameter which are sent by the monitoring terminal;
s120: the method comprises the steps that a power switch circuit switch is opened at regular time according to a tension acquisition time interval value set by a system, a side-pressure type tension sensor acquires a catenary (or contact line) tension value of a contact network, a single chip microcomputer processes and stores tension data, and the power switch circuit switch is closed;
s130: judging whether the acquired tension value of a catenary (or a contact line) exceeds a tension alarm threshold value according to the tension alarm threshold value set by the system, if so, uploading the tension alarm data to a data center station through a GPRS (general packet radio service) wireless communication module, sending a diagnosis result to a monitoring terminal by the data center station, informing an operation and maintenance operator on duty through a short message by the monitoring terminal, and executing the step S140; if the tension alarm threshold value is not exceeded, executing step S140;
s140: acquiring a time interval value according to a working condition set by a system, acquiring stored tension data by the singlechip at regular time, increasing the working condition packet number once, judging whether the working condition packet number reaches the working condition packet number set by the system, uploading the tension working condition data to a data center station through a GPRS wireless communication module if the working condition packet number reaches the working condition packet number set by the system, sending a diagnosis result to a monitoring terminal by the data center station, and returning to the step S120; if the number of working condition packets does not reach the set working condition of the system, the process returns to step S120.
Preferably, the tension alarm threshold comprises a minimum value and a maximum value, and the acquired catenary (or contact line) tension value is smaller than the minimum value or larger than the maximum value, so that the tension alarm threshold is exceeded.
Preferably, the working condition acquisition time interval value is greater than the tension acquisition time interval value, the tension acquisition time interval value is 5 minutes, the working condition acquisition time interval value is 1 hour, the working condition number of packets is 24 packets, the tension alarm threshold value comprises a minimum value and a maximum value, the minimum value is 10 kilonewtons, and the maximum value is 30 kilonewtons.
Drawings
FIG. 1 is a schematic block diagram of a monitoring system of the present invention
FIG. 2 is a schematic block diagram of the tension force acquisition device of the present invention
FIG. 3 is a schematic block diagram of a microprocessor module of the present invention
FIG. 4 is a schematic block diagram of a power module of the present invention
FIG. 5 is a schematic block diagram of the structural housing of the device of the present invention
FIG. 6 is a front view of the lateral pressure type tension sensor of the present invention
FIG. 7 is a schematic block diagram of the monitoring method of the present invention
In the drawings, the components represented by the respective reference numerals are listed below:
1. a tension collecting device; 2. a data center station; 3. a monitoring terminal; 110. a lateral pressure type tension sensor; 120. a microprocessor module; 130. a power supply module; 140. a device structural housing; 111. a transmitter; 122. a single chip microcomputer; 123. a power switching circuit; a GPRS wireless communication module; a solar panel; 132. a charging module; 133. a lithium battery; 141. a cavity upper cover; 101. a first connection portion; 102. a threaded hole; 103. layering; 104. a cavity upper cover body; 105. an upper cover plate; 142. a cavity lower shell; 201. a second connecting portion; 202. a cavity lower shell body; 203. a lower shell cover plate; 204. a drain hole; 143. a bolt; 144. a rubber gasket; 111. a clamping portion; 112. a structural body; 113. a measuring element; 114. a catenary cable.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
A schematic block diagram of the monitoring system of the present invention is shown in fig. 1. The railway contact net catenary contact line tension monitoring and early warning system comprises a tension acquisition device 1, a data center station 2 and a monitoring terminal 3. The tension gathering device 1 includes a side pressure type tension sensor 110, a microprocessor module 120, a power supply module 130, and a device structure housing 140, as shown in fig. 2. The microprocessor module 120 includes a transmitter 121, a single chip 122, a power switch circuit 123 and a GPRS wireless communication module 124, as shown in fig. 4. The side-pressure tension sensor 110 converts the shearing force of the carrier cable (or contact line) into a vertical force and outputs an electric signal, the transmitter 121 amplifies a millivolt-level signal output by the side-pressure tension sensor 110 to improve the signal-to-noise ratio, and the single chip 122 is internally provided with a 16-bit ADC which can directly perform analog-to-digital conversion on the output signal of the transmitter 121 to obtain a tension data sampling value. The single chip microcomputer 122 performs data communication with the data center station 2 through the GPRS wireless communication module 124. Preferably, the single chip microcomputer 122 is connected with the monitoring terminal 3 through the GPRS wireless communication module 124 and the data center station 2, the monitoring terminal 3 controls the working mode of the single chip microcomputer 122, and the monitoring terminal 3 can perform remote system upgrade on the single chip microcomputer 122.
The tension collecting device 1 is arranged on a catenary (or a contact line) of the contact network, preferably a steel wire rope between a chaste wheel and a balance wheel of a tension compensation device of the contact network, and the tension collecting device 1 is arranged without influencing the safe operation of a railway because the tension collecting device is insulated from the high-voltage side of the contact network and belongs to a low potential; since the tension collecting device 1 is installed on a catenary (or a contact line) of a contact net, in order to reduce damage to the tension compensating device of the contact net, the weight of the tension collecting device 1 cannot be too heavy, and preferably the total weight does not exceed 5 kg.
The outer surface of the device structure shell 140 is provided with a groove, and a solar cell panel is embedded in the groove; limited by the total weight of the tension collecting device 1, the capacity of the power module 130 cannot be very large, that is, the power of the solar cell panel and the capacity of the energy storage battery used in cooperation are both small, so that the power consumption of the system must be reduced to ensure that the device can work for a long time. Considering that the tension of the catenary (or contact line) of the contact network generally does not change greatly in a short time, and the power consumption of the side-pressure type tension sensor 110 is as high as hundreds of milliwatts, the power supply of the side-pressure type tension sensor 110 can be turned on and off at regular time to reduce unnecessary energy consumption. The power supply control of the side-pressure tension sensor 110 is realized through the power switch circuit 123, specifically, a positive power input end of the power switch circuit 123 is connected with a positive power output end of the power module 130, a positive power output end of the power switch circuit 123 is connected with a positive power input end of the side-pressure tension sensor 110, a switch control end of the power switch circuit 123 is connected with the single chip microcomputer 122, and the on-off state of the power switch circuit 123 is controlled by the single chip microcomputer 122 at regular time. The power module 130 includes a solar cell panel 131, a charging module 132, and a lithium battery 133, as shown in fig. 4. The power of the solar cell panel 131 is 5 watts, and the charging module 132 is provided with a direct current voltage, the charging module 132 charges the lithium battery 133, and the lithium battery 133 supplies power to each module of the tension collecting device 1.
A schematic block diagram of the structural housing of the device of the present invention is shown in fig. 5. The device structure shell comprises a cavity upper cover 141, a cavity lower shell 142 and bolts 143, wherein the edge of the cavity upper cover 141 extends inwards to form a first connecting part 101, solar panels 131 are arranged in two rectangular surfaces of the cavity upper cover 141, threaded holes 102 are correspondingly formed in two ends of the first connecting part 101 and a second connecting part 201 of the cavity lower shell 142, and the threaded holes 102 penetrate through the first connecting part 101 and the second connecting part 201. The bolts 143 can be used in cooperation with the threaded holes 102 to directly fix the upper chamber cover 141 and the lower chamber cover 142 together by means of a threaded connection. The solar cell panel 131 can be fixed in the rectangular groove of the cavity upper cover 141 through glass cement, but the solar cell panel 131 with faults is not easy to detach in the mode, therefore, the solar cell panel 131 is fixed in the rectangular groove of the cavity upper cover 141 through the pressing strip 103, the width of the top of the pressing strip 103 is slightly larger than the width of the bottom of the pressing strip 103, the pressing strip is inverted L-shaped, the protruding part of the top of the pressing strip shields the edge of the solar cell panel 131 to play a fixing role, threaded holes are correspondingly formed in the bottom of the pressing strip and the rectangular groove of the cavity upper cover 141, and the pressing strip 103 is.
Preferably, the cavity upper cover 141 is composed of a cavity upper cover body 104 and an upper cover plate 105, and the cavity upper cover body 104 is a structural part of the cavity upper cover 141 excluding the upper cover plate 105. The cavity upper cover body 104 and the upper cover plate 105 are respectively processed, the upper cover plate 105 and the cavity upper cover body 104 are correspondingly provided with threaded holes, and the upper cover plate 105 can be fixed on the cavity upper cover body 104 through screws. Similarly, the cavity lower shell 142 is composed of a cavity lower shell body 202 and a lower shell cover plate 203, the lower shell cover plate 203 and the cavity lower shell body 202 are correspondingly provided with threaded holes, and the lower shell cover plate 203 is fixed on the cavity lower shell body 202 through screws. To reduce wear of the device on the messenger wire contact portion, a rubber gasket 144 is provided between the device and the messenger wire contact portion. The rubber gasket 144 is installed between the central through hole of the upper cover 141 and the lower cover 142 of the cavity and the messenger wire, so that on one hand, the damage of the device to the messenger wire can be reduced, and on the other hand, the damping effect can be realized.
The front view of the side pressure type tension sensor of the present invention is shown in fig. 6. The side-pressing type tension sensor 110 comprises a clamping part 111, a structure body 112 and a measuring element 113, wherein the structure body 112 is provided with an arc-shaped guide groove through which a catenary (or a contact line) passes, the clamping part 111 clamps the catenary (or the contact line) and enables the catenary (or the contact line) to contact the surface of the arc-shaped guide groove of the structure body 112, and the measuring element 113 senses tension change of the catenary (or the contact line) and outputs an electric signal after circuit conversion. The measuring element 113 uses semiconductor material with piezoresistive effect as a sensitive element, and a sensitive chip of the semiconductor material is packaged in the structural body 112 of the stainless steel corrugated diaphragm by using ISO technology, and silicone oil is filled between the stainless steel corrugated diaphragm and the chip.
The tension of a catenary (or a contact line) of the contact network acts on the corrugated diaphragm to press the silicone oil in the corrugated diaphragm, and the silicone oil transmits the pressure of the diaphragm to the semiconductor chip. After the chip is pressed, the resistance value of the chip is changed, and a resistance signal is led out through the lead. The stainless steel corrugated diaphragm structural body 112 is under pressure and protects the chip. The leads of the resistance signal are connected into a wheatstone bridge. When the sensitive chip has no external pressure, the bridge is in a balance state (called zero position), when the chip resistance is changed after the chip is pressed, the bridge is out of balance, and under the condition of applying a voltage power supply to the bridge, the bridge outputs an electric signal corresponding to the pressure and outputs the electric signal.
The schematic block diagram of the working method of the on-line monitoring and early warning system for catenary contact line tension of the railway contact network is shown in fig. 7, and the method comprises the following steps:
s110: the tension acquisition device detects and receives a tension acquisition time interval value, a working condition packet number and a tension alarm threshold instruction parameter which are sent by the monitoring terminal;
s120: the method comprises the steps that a power switch circuit switch is opened at regular time according to a tension acquisition time interval value set by a system, a side-pressure type tension sensor acquires a catenary (or contact line) tension value of a contact network, a single chip microcomputer processes and stores tension data, and the power switch circuit switch is closed;
s130: judging whether the acquired tension value of a catenary (or a contact line) exceeds a tension alarm threshold value according to the tension alarm threshold value set by the system, if so, uploading the tension alarm data to a data center station through a GPRS (general packet radio service) wireless communication module, sending a diagnosis result to a monitoring terminal by the data center station, informing an operation and maintenance operator on duty through a short message by the monitoring terminal, and executing the step S140; if the tension alarm threshold value is not exceeded, executing step S140;
s140: acquiring a time interval value according to a working condition set by a system, acquiring stored tension data by the singlechip at regular time, increasing the working condition packet number once, judging whether the working condition packet number reaches the working condition packet number set by the system, uploading the tension working condition data to a data center station through a GPRS wireless communication module if the working condition packet number reaches the working condition packet number set by the system, sending a diagnosis result to a monitoring terminal by the data center station, and returning to the step S120; if the number of working condition packets does not reach the set working condition of the system, the process returns to step S120.
In step S110, the period of tension collection can be changed by setting relevant command parameters in the monitoring software and transmitting the parameters to the tension collection device, and the longer the period is, the longer the power-on time of the bypass tension sensor is, so as to reduce the power consumption of the lithium battery. When setting, the working condition acquisition time interval value is greater than the tension acquisition time interval value, for example, the tension acquisition time interval value is 5 minutes, the working condition acquisition time interval value is 1 hour, the number of working condition packets is 24 packets, the tension alarm threshold value includes a minimum value and a maximum value, the minimum value is 10 kilonewtons, and the maximum value is 30 kilonewtons.
In step S130, the tension alarm threshold includes a minimum value and a maximum value, and the acquired catenary (or contact line) tension value is smaller than the minimum value or larger than the maximum value, which is greater than the tension alarm threshold.
The GPRS wireless communication module has larger power when sending data, the amplitude power is as high as 2 watts, therefore, in order to reduce the power consumption of the GPRS wireless communication module, the GPRS wireless communication module sends service data to the data center station only when detecting that the tension value of a catenary (or a contact line) is abnormal or the number of working condition data packets meets a set value, and the working condition data is used for operation and maintenance managers to know the tension value of the catenary (or the contact line) under the normal condition. By adopting the mode, the data transmission quantity is greatly reduced, and the power consumption of the GPR wireless communication module is reduced. The power consumption of the tension collecting device is mainly distributed on the side-pressing type tension sensor and the GPRS wireless communication module, tension data are collected periodically by controlling an input power supply for the side-pressing type tension sensor to work, the power consumption of the whole tension collecting device is reduced by adjusting the working mode of the GPRS wireless communication module, and the tension collecting device can still work normally when the sunlight is not enough.
The embodiments described above are more specific and detailed, but should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A railway contact net carrier cable contact line tension on-line monitoring and early warning system and method, including tension gathering unit, data center station and monitor terminal; the tension acquisition device uploads field data to the data center station, and the data center station processes and diagnoses the field data and sends a diagnosis result to the monitoring terminal; the tension acquisition device is connected with the data center station, and the data center station is connected with the monitoring terminal; it is characterized in that the preparation method is characterized in that,
the tension acquisition device is arranged on a catenary contact wire of the contact network and comprises a side-pressure type tension sensor, a microprocessor module, a power supply module and a device structure shell; the side-pressing type tension sensor clamps a carrier cable (or a contact wire), the microprocessor module comprises a transmitter, a singlechip, a power switch circuit and a GPRS wireless communication module, and the circuits are communicated; the output end of the side-pressure type tension sensor is electrically connected with the input end of the transmitter, the positive power supply input end of the power supply switch circuit is electrically connected with the positive power supply output end of the power supply module, the positive power supply output end of the power supply switch circuit is electrically connected with the positive power supply input end of the side-pressure type tension sensor, and the switch control end of the power supply switch circuit is electrically connected with the single chip microcomputer; the outer surface of the device structure shell is provided with a groove, and a solar cell panel is embedded in the groove; the side pressure type tension sensor, the microprocessor module and the power supply module are fixed in a cavity of the device structure shell.
2. The on-line monitoring and early warning system and method for the catenary contact line tension of the railway contact network according to claim 1, wherein the structural shell of the device comprises a cavity upper cover, a cavity lower shell and a bolt; the solar cell panel comprises a cavity body upper cover, a first connecting part, a second connecting part and a solar cell panel, wherein the cavity body upper cover is of a triangular prism structure with an opening at the bottom, the opening at the bottom of the cavity body upper cover extends inwards to form the first connecting part, and the solar cell panel is embedded in two rectangular grooves in the middle of the cavity body upper cover; the lower cavity shell is of a semicircular structure with an opening at the upper part, and the opening of the lower cavity shell extends outwards to form a second connecting part; the centers of the cavity upper cover and the cavity lower shell are provided with through holes which can pass through a carrier cable (or a contact line); the first connecting portion and the second connecting portion are provided with corresponding threaded holes, and the bolt penetrates through the threaded holes of the first connecting portion and the second connecting portion to fixedly connect the cavity upper cover and the cavity lower shell.
3. The system and the method for on-line monitoring and early warning of the tension of the catenary contact line of the railway contact network as claimed in claim 2, wherein the cavity upper cover comprises an upper cover plate and a cavity upper cover body, and the upper cover plate is detachably in threaded connection with the cavity upper cover body through a screw; the cavity lower shell comprises a lower shell cover plate and a cavity lower shell body, and the lower shell cover plate is detachably in threaded connection with the cavity lower shell body through a screw; the solar cell panel fixing structure is characterized in that the cavity upper cover body is provided with two rectangular grooves in which the solar cell panel is embedded, the cavity upper cover body comprises a pressing strip, the solar cell panel is fixed in the rectangular grooves by the pressing strip, corresponding threaded holes are formed in the rectangular grooves of the cavity upper cover body and the bottom of the pressing strip, and the pressing strip is detachably connected with the cavity upper cover body in a threaded manner through screws.
4. The system and the method for on-line monitoring and early warning of the contact line tension of the catenary of the railway contact network as claimed in claim 1, 2 or 3, wherein the lateral pressure type tension sensor comprises a clamping part, a structural body and a measuring element, wherein the clamping part is detachably connected with the structural body by screw threads; the structure body is provided with an arc-shaped guide groove through which a catenary (or a contact wire) passes, the clamping part clamps the catenary (or the contact wire) and enables the catenary (or the contact wire) to contact the surface of the arc-shaped guide groove of the structure body, and the measuring element senses tension change of the catenary (or the contact wire) and outputs an electric signal after circuit conversion.
5. The system and the method for on-line monitoring and early warning of the contact line tension of the catenary of the railway contact network according to claim 1, 2 or 3, wherein the power module comprises a solar cell panel, a charging module and a lithium battery; the solar cell panel is electrically connected with the charging module, and the charging module is electrically connected with the lithium battery.
6. The system and the method for on-line monitoring and early warning of the contact line tension of the catenary of a railway contact network as claimed in claim 1, 2 or 3, wherein the single chip microcomputer performs data interaction with the data center station through the GPRS wireless communication module, the data center station performs data interaction with the monitoring terminal through the Internet, the monitoring terminal controls the working mode of the single chip microcomputer, and the monitoring terminal can perform remote system upgrade on the single chip microcomputer.
7. The utility model provides a railway contact net carrier cable contact wire tension on-line monitoring early warning system and method which characterized in that includes:
s110: the tension acquisition device detects and receives a tension acquisition time interval value, a working condition packet number and a tension alarm threshold instruction parameter which are sent by the monitoring terminal;
s120: the method comprises the steps that a power switch circuit switch is opened at regular time according to a tension acquisition time interval value set by a system, a side-pressure type tension sensor acquires a catenary bearing (or contact line) cable tension value of a contact network, a single chip microcomputer processes and stores tension data, and the power switch circuit switch is closed;
s130: judging whether the acquired tension value of the catenary (or the contact line) exceeds a tension reporting station or not according to a tension alarm threshold set by the system, sending a diagnosis result to a monitoring terminal, notifying an operation and maintenance operator by a short message through the monitoring terminal, and executing the step S140; if the tension alarm threshold value is not exceeded, executing step S140;
s140: acquiring a time interval value according to a working condition set by a system, acquiring stored tension data by the singlechip at regular time, increasing the working condition packet number once, judging whether the working condition packet number reaches the working condition packet number set by the system, uploading the tension working condition data to a data center station through a GPRS wireless communication module if the working condition packet number reaches the working condition packet number set by the system, sending a diagnosis result to a monitoring terminal by the data center station, and returning to the step S120; if the number of working condition packets does not reach the set working condition of the system, the process returns to step S120.
8. The system and the method for on-line monitoring and early warning of the catenary contact line tension of the railway contact network according to claim 7, wherein the tension warning threshold comprises a minimum value and a maximum value, and the acquired catenary (or contact line) tension value of the contact network is smaller than the minimum value or larger than the maximum value, so that the acquired catenary (or contact line) tension value exceeds the tension warning threshold.
9. The system and the method for on-line monitoring and early warning of the contact line tension of the catenary of a railway contact network according to claim 7 or 8, wherein the working condition acquisition time interval value is greater than the tension acquisition time interval value, the tension acquisition time interval value is 5 minutes, the working condition acquisition time interval value is 1 hour, the working condition number of packets is 24 packets, and the tension alarm threshold value comprises a minimum value and a maximum value, the minimum value is 10 kilonewtons, and the maximum value is 30 kilonewtons.
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| CN113138162A (en) * | 2021-06-22 | 2021-07-20 | 南京高华科技股份有限公司 | Steel wire rope state monitoring device and monitoring method |
| CN114166397A (en) * | 2021-11-26 | 2022-03-11 | 中国航空工业集团公司西安飞行自动控制研究所 | Cable integrated tension monitoring device and monitoring method |
| CN114459659A (en) * | 2022-02-09 | 2022-05-10 | 陕西路易德路桥技术有限公司 | Train contact net carrier cable tension monitoring device |
| CN114993540A (en) * | 2022-08-02 | 2022-09-02 | 国网江西省电力有限公司建设分公司 | Data acquisition, protection and storage device for tension sensor |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113138162A (en) * | 2021-06-22 | 2021-07-20 | 南京高华科技股份有限公司 | Steel wire rope state monitoring device and monitoring method |
| CN114166397A (en) * | 2021-11-26 | 2022-03-11 | 中国航空工业集团公司西安飞行自动控制研究所 | Cable integrated tension monitoring device and monitoring method |
| CN114459659A (en) * | 2022-02-09 | 2022-05-10 | 陕西路易德路桥技术有限公司 | Train contact net carrier cable tension monitoring device |
| CN114459659B (en) * | 2022-02-09 | 2024-01-30 | 陕西路易德路桥技术有限公司 | Train contact net carrier cable tension monitoring device |
| CN114993540A (en) * | 2022-08-02 | 2022-09-02 | 国网江西省电力有限公司建设分公司 | Data acquisition, protection and storage device for tension sensor |
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