CN115923869A - Shaft counting system with broken rail detection function and using method - Google Patents
Shaft counting system with broken rail detection function and using method Download PDFInfo
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Abstract
The invention discloses an axle counting system with a broken rail detection function and a using method thereof, wherein the axle counting system is applied to two axle counting points which are separated by a preset distance in an axle counting section; the axle counting system at least comprises: four axle counting sensors, two broken rail axle counting information processing CPUs and a section state processor; each axle counting point adopts a symmetrical installation mode of two axle counting sensors, the occupied clear state of a section is checked by utilizing axle counting information of the sensors, the alternating current or direct current signals of the steel rail sensed by the sensors are utilized, and the broken rail of the section is accurately judged by comparing the change increment relation of the steel rail reflux of the two sensors at one axle counting point, so that the defect that an axle counting system cannot check the broken rail is overcome, the axle counting superposition broken rail detection function can be simultaneously realized, and the two axle counting points have the advantages of being integrated.
Description
Technical Field
The invention relates to the technical field of electrified rail transit, in particular to a shaft counting system with a rail breakage detection function and a using method thereof.
Background
At present, the track circuit scheme is adopted for section occupation and broken track inspection at home and abroad, the problems of poor shunting and section red light bands exist in the track circuit, the problems cannot be thoroughly solved although a plurality of methods are adopted, the traditional track circuit is gradually replaced by an axle counting track circuit, but the problems of poor shunting and section red light bands of the track circuit cannot be detected in the existing axle counting system.
Therefore, how to integrate the axle counting and the rail breakage inspection together to design a system becomes a difficult problem to be solved at present.
Disclosure of Invention
The invention provides an axle counting system with a rail breakage detection function and a using method thereof, which solve the problem that the conventional axle counting system cannot realize rail breakage detection; the purpose is that the broken rail detection function is superposed in the axle counting system, so that the axle counting system has the advantages of integrating a track circuit and an axle counting.
In order to achieve the purpose, the invention adopts the technical scheme that:
in a first aspect, the invention provides an axle counting system with a broken rail detection function, which is applied to two axle counting points separated by a preset distance in an axle counting section; the axle counting system at least comprises: four axle counting sensors, two broken rail axle counting information processing CPUs and a section state processor;
the first axle counting point is provided with a first axle counting sensor and a second axle counting sensor which are symmetrically arranged on one side of the two steel rails; a third axle counting sensor and a fourth axle counting sensor are arranged at the second axle counting point and are symmetrically arranged at one side of the two steel rails; each axle counting sensor is provided with three output ends which are respectively a first output end and used for outputting steel rail backflow information; the second output end and the third output end respectively output the axle counting information corresponding to the axle counting sensor;
the first broken rail axle counting information processing CPU is respectively connected with three output ends of the first axle counting sensor and the second axle counting sensor;
the second broken rail axle counting information processing CPU is respectively connected with three output ends of a third axle counting sensor and a fourth axle counting sensor;
the section state processor is respectively connected with the first broken rail axle counting information processing CPU and the second broken rail axle counting information processing CPU, and is used for judging the state of the axle counting section, processing broken rail information and outputting the state of the axle counting section and the broken rail information.
Further, the first broken rail axle counting information processing CPU judges the number of the axles passing in and out and the driving direction of the first axle counting sensor and the second axle counting sensor according to the information of the second output end and the third output end of the first axle counting sensor and the second axle counting sensor corresponding to each other.
Further, the second broken rail axle counting information processing CPU judges the number of the axles passing in and out and the driving direction of the third axle counting sensor and the fourth axle counting sensor according to the information of the second output end and the third output end of the third axle counting sensor and the fourth axle counting sensor.
Further, when the running direction of the vehicle is the same as the return direction of the steel rails, the first broken rail axle counting information processing CPU calculates the relative average value of the currents of the two steel rails according to the first output end information corresponding to the first axle counting sensor and the second axle counting sensor, and the relative average value is used as a reference initial value of a real-time operation period and is set as I1-0 and I2-0; setting the current relative values of the next operation period as I1 and I2;
when (I2/I2-0) <1, (I1/I1-0) >1 or (I2/I2-0) >1, (I1/I1-0) <1; judging that the axle counting section has broken rails.
Further, when the running direction of the vehicle is opposite to the backflow direction of the steel rails, the second broken rail axle counting information processing CPU calculates the backflow relative average value of the two steel rails according to the first output end information corresponding to the third axle counting sensor and the fourth axle counting sensor, and the backflow relative average value is used as a reference initial value of the next operation period and is set as I1-0 and I2-0; setting the reflux relative values of the next operation period as I1 and I2;
when (I2/I2-0) >1, (I1/I1-0) <1 or (I2/I2-0) <1, (I1/I1-0) >1; judging that the axle counting section has broken rails.
In a second aspect, the present invention further provides a method for using the axle counting system with a broken rail detection function, where the axle counting system with a broken rail detection function according to any one of the above embodiments is used to determine the status of the axle counting section and process broken rail information.
Further, the method specifically comprises the following steps:
(1) The first broken rail axle counting information processing CPU judges the number of the axles entering and exiting and the driving direction of the first axle counting sensor and the second axle counting sensor according to the information of the corresponding second output end and the third output end of the first axle counting sensor and the second axle counting sensor;
(2) The second broken rail axle counting information processing CPU judges the number of the inlet and outlet axles and the driving direction of the third axle counting sensor and the fourth axle counting sensor according to the information of the corresponding second output end and the third output end of the third axle counting sensor and the fourth axle counting sensor;
(3) When the corresponding shaft inlet number and shaft outlet number of the first shaft counting point and the second shaft counting point are the same, the section state processor judges that the state of the shaft counting section is clear; otherwise, the state is occupied;
(4) When the running direction of the vehicle is the same as the return direction of the steel rails, the first broken rail axle counting information processing CPU calculates the return incremental change states of the two steel rails according to first output end information corresponding to the first axle counting sensor and the second axle counting sensor, and judges whether the steel rails have broken rails or not;
(5) And when the running direction of the vehicle is opposite to the return direction of the steel rails, the second broken rail axle counting information processing CPU calculates the return incremental change states of the two steel rails according to the first output end information corresponding to the third axle counting sensor and the fourth axle counting sensor, and judges whether the steel rails have broken rails.
Further, calculating the return flow increment change states of the two steel rails in the step (4), and judging whether rail breakage exists in the steel rails; the method specifically comprises the following steps:
calculating the relative average value of the currents of the two steel rails as a reference initial value of a real-time operation period, and setting the reference initial value as I1-0 and I2-0; setting the current relative values of the next operation period as I1 and I2;
when (I2/I2-0) <1, (I1/I1-0) >1 or (I2/I2-0) >1, (I1/I1-0) <1; judging that the axle counting section has broken rails.
Further, calculating the return flow increment change states of the two steel rails in the step (5), and judging whether rail breakage exists in the steel rails; the method specifically comprises the following steps:
calculating the relative average value of the reflux of the two steel rails, taking the relative average value as a reference initial value of the next operation period, and setting the relative average value as I1-0 and I2-0; setting the reflux relative values of the next operation period as I1 and I2;
when (I2/I2-0) >1, (I1/I1-0) <1 or (I2/I2-0) <1, (I1/I1-0) >1; judging that the axle counting section has broken rails.
Compared with the prior art, the invention has the following beneficial effects:
the axle counting system with the broken rail detection function provided by the embodiment of the invention is applied to two axle counting points which are separated by a preset distance in an axle counting section; the axle counting system at least comprises: the system comprises an axle counting sensor, a broken rail axle counting information processing CPU and a section state processor; each axle counting point adopts a symmetrical installation mode of two axle counting sensors, the occupied clear state of a section is checked by utilizing axle counting information of the sensors, the alternating current or direct current signals of the steel rail sensed by the sensors are utilized, and the broken rail of the section is accurately judged by comparing the change increment relation of the steel rail reflux of the two sensors at one axle counting point, so that the defect that an axle counting system cannot perform broken rail check is overcome, the axle counting superposition broken rail detection function can be realized simultaneously, and the two axle counting points have the advantages of being integrated.
Drawings
Fig. 1 is a schematic structural diagram of a shaft counting system with a rail breakage detection function according to an embodiment of the present invention;
FIG. 2 is an analysis schematic diagram of the case where the towing return flow and the traveling direction are the same when the rail is broken according to the embodiment of the present invention;
FIG. 3 is an analysis schematic diagram of a traction backflow direction opposite to a traveling direction in a rail break state according to an embodiment of the present invention;
FIG. 4 is a block diagram of an axle counting sensor provided in an embodiment of the present invention;
FIG. 5 is a schematic diagram of an axle counting sensor provided by an embodiment of the invention;
in the drawings, 1-a first axle counting sensor; 2-a second axle counting sensor; 3-a third gage shaft sensor; 4-a fourth axle counting sensor; 5-a first rail; 6-a second steel rail; 7-first broken rail axle counting information processing CPU; 8-second broken rail axle counting information processing CPU; 9-a section status handler; 10-information transmission;
11-rail backflow information at a first output of a first axle counting sensor; 12-axle counting information of a second output end of the first axle counting sensor; 13-axle counting information of a third output end of the first axle counting sensor;
21-rail reflux information of a first output end of the second axle counting sensor; 22-axle counting information of a second output end of the second axle counting sensor; 23-axle counting information of a third output end of the second axle counting sensor;
31-rail backflow information at a first output of a third gauge axis sensor; 32-axle counting information of a second output end of the third axle counting sensor; 33-axle counting information of a third output end of the third axle counting sensor;
41-rail backflow information at a first output end of a fourth axle counting sensor; 42-axle counting information of a second output end of the fourth axle counting sensor; 43-axle counting information of a third output end of a fourth axle counting sensor;
51-a first axle counting point; 52-second axle counting point;
101-a transmitting coil; 102-AC/DC receiving sensor; 103-a first receiving coil; 104-a second receiving coil; 105-a first synchronous detection amplifier; 106-a second synchronous detector amplifier; 107-differential amplifier; 108-a signal emission source; 109-a first synchronous detection control signal; 110-second synchronous detection control signal.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, the axle counting system with the rail breakage detection function provided by the invention is applied to the field of electrified traction rail traffic; the axle counting system at least comprises: four axle counting sensors, two broken rail axle counting information processing CPUs and a section state processor;
wherein, the first axle counting point 51 is provided with a first axle counting sensor 1 and a second axle counting sensor 2 which are symmetrically arranged at one side of two steel rails (a first steel rail 5 and a second steel rail 6); when the steel rail is a common steel rail, as shown in figure 1, the steel rail is arranged on the inner side of the steel rail; in the case of a channel rail, it is mounted on the outside.
The second axle counting point 52 is provided with a third axle counting sensor 3 and a fourth axle counting sensor 4 which are symmetrically arranged on one side of two steel rails (a first steel rail 5 and a second steel rail 6); when the steel rail is a common steel rail, as shown in figure 1, the steel rail is arranged on the inner side of the steel rail; in the case of a channel rail, it is mounted on the outside.
Referring to fig. 1, two axle counting points are taken as an example for explanation, each axle counting point has 6 pieces of information, and the first axle counting point is:
the axle counting information 12 of the second output end of the first axle counting sensor;
rail return information 21 at a first output of the second axle counting sensor;
axle counting information 22 at a second output end of the second axle counting sensor;
and axle counting information 23 at a third output end of the second axle counting sensor.
The second axle counting point is:
rail return information 31 at a first output of the third gage beam sensor;
axle counting information 32 at a second output of the third axle counting sensor;
rail return information 41 at a first output of the fourth axle counting sensor;
axle counting information 42 at a second output end of the fourth axle counting sensor;
and axle counting information 43 at a third output end of the fourth axle counting sensor.
Each axle counting sensor is provided with three output ends which are respectively a first output end and used for outputting steel rail backflow information; the second output end and the third output end respectively output the axle counting information corresponding to the axle counting sensor;
the first broken rail axle counting information processing CPU7 is respectively connected with three output ends of the first axle counting sensor 1 and the second axle counting sensor 2; the number of the axles passing in and out and the driving direction of the first axle counting sensor 1 and the second axle counting sensor 2 can be respectively judged by utilizing the axle counting information 12 at the second output end of the first axle counting sensor, the axle counting information 13 at the third output end of the first axle counting sensor, the axle counting information 22 at the second output end of the second axle counting sensor and the axle counting information 23 at the third output end of the second axle counting sensor. And the reflux increment change states of the two steel rails can be calculated by utilizing the information 11 and 21, and the rail breaking condition of the steel rails can be judged according to the reflux increment change states of the two steel rails.
The second broken rail axle counting information processing CPU8 is respectively connected with three output ends of the third axle counting sensor 3 and the fourth axle counting sensor 4; similarly, the number of in-and-out axes and the traveling direction of the third axle sensor 3 and the fourth axle sensor 4 can be determined using four items of information in total, 32, 33, 42, and 43, respectively. And the reflux increment change states of the two steel rails can be calculated by using the information 31 and 41, and the rail breaking condition of the steel rails can be judged according to the reflux increment change states of the two steel rails.
The information 11, 21, 31 and 41 is alternating current/direct current information, and meets the requirements of alternating current traction and direct current traction environments.
The section state processor 9 is respectively connected with the first broken rail axle counting information processing CPU7 and the second broken rail axle counting information processing CPU8, and is used for judging the state of the axle counting section, processing broken rail information and outputting the section state and broken rail information. For example, the block state processor 9 sends block occupancy status and track break information to the interlock system and maintenance system via the information transfer 10.
In the embodiment, a plurality of axle counting sections can be designed according to the line condition, a pair of axle counting sensors are installed at each port of each section, and axle counting points between adjacent sections are shared; the distance of the spacing is determined according to the actual section management rule; all related rail break axle counting information processing CPUs send information processing results to the section state processor, and the section state processor outputs section occupation states and rail break information to the interlocking system and the maintenance system. In addition, the axle counting system of the invention has the application environment that: the method can be applied to electrified traction lines, and if the traction backflow is single-rail backflow, two steel rails need to be short-circuited at a backflow point through a short-circuit jumper wire to form double-rail backflow.
The specific axle counting principle is shown in fig. 1:
the first axle counting sensor 1 and the second axle counting sensor 2 are symmetrically arranged at the inner sides of two steel rails of one axle counting arrangement point (groove-shaped steel rails are arranged at the outer sides), the third axle counting sensor 3 and the fourth axle counting sensor 4 are symmetrically arranged at the inner sides of two steel rails of the other axle counting arrangement point (groove-shaped steel rails are arranged at the outer sides), the two axle counting points form an axle counting section, the first axle counting sensor 1 sends information 11, 12 and 13 to the first broken rail axle counting information processing CPU7, and the second axle counting sensor 2 sends information 21, 22 and 23 to the first broken rail axle counting information processing CPU7; the first broken rail axle counting information processing CPU7 calculates the number of in-out axles of the axle counting point from the information 12, 13 of the first axle counting sensor 1 and the information 22, 33 of the second axle counting sensor 2.
The third axle counting sensor 3 sends the information 31, 32 and 33 to the broken rail axle counting information processing CPU8, and the fourth axle counting sensor 4 sends the information 41, 42 and 43 to the second broken rail axle counting information processing CPU8; the second broken rail axle counting information processing CPU8 calculates the number of in-out axles at the axle counting point from the information 32, 33 of the third axle counting sensor 3 and the information 42, 43 of the fourth axle counting sensor 4.
The first broken rail axle counting information processing CPU7 and the second broken rail axle counting information processing CPU8 respectively send the calculated number of the incoming and outgoing axles to the zone state processor 9, the first axle counting sensor 1 and the second axle counting sensor 2 form a redundant relation of the axle counting, the third axle counting sensor 3 and the fourth axle counting sensor 4 form a redundant relation of the axle counting, when the axle counting formed by the first axle counting sensor 1 and the second axle counting sensor 2 and the axle counting point formed by the third axle counting sensor 3 and the fourth axle counting sensor 4 have the same number of the incoming axles and the outgoing axles, the axle zone is judged to be clear, and when the number of the incoming axles and the number of the outgoing axles are different, the axle counting zone is judged to be occupied.
When the vehicle running direction is the same as the rail return direction, the principle of rail break judgment is as shown in the attached figure 2:
the first broken rail axle counting information processing CPU7 calculates the relative current values of the first rail 5 and the second rail 6 from the information 11 of the first axle counting sensor 1 and the information 21 of the second axle counting sensor 2, and sets the relative current values as I1-0 and I2-0 and I1 and I2 as the relative current values in the next operation cycle, as a reference initial value of the time-to-time operation cycle plus an allowable error (schmidt hysteresis characteristic) after averaging a plurality of times.
When the vehicle crosses the breakpoint, the two rails form a shunt because the broken rails are communicated by the vehicle, and at the moment, (I2/I2-0) <1, (I1/I1-0) >1 or (I2/I2-0) >1, (I1/I1-0) <1. Therefore, the rail break of the vehicle running section can be judged.
When the vehicle running direction is opposite to the steel rail backflow direction, the principle of rail breakage judgment is as shown in the attached figure 3:
the second broken rail axle counting information processing CPU8 calculates a relative average value of the backflow of the first rail 5 and the second rail 6 from the information 31 of the third axle counting sensor 3 and the information 41 of the fourth axle counting sensor 4, and this value is set as I1-0 and I2-0 as a reference initial value plus an allowable error (schmidt hysteresis characteristic) in the next calculation period, and the relative value of the backflow in the next calculation period is set as I1 and I2.
When the vehicle crosses the breakpoint, (I2/I2-0) >1, (I1/I1-0) <1, or (I2/I2-0) <1, (I1/I1-0) >1 when the vehicle is driven off the breakpoint. Therefore, the rail break of the vehicle running section can be judged.
And (2) sudden rail breakage, namely, sudden increment reverse change occurs in (I2/I2-0) and (I1/I1-0) under a static condition, so that the rail breakage in a certain section can be judged. A flow equalizing line can be added between the two steel rails, and the flow equalizing point between the two axle counting points is not more than one.
Example 2:
the invention also provides a using method of the axle counting system with the rail breakage detecting function, and the axle counting system with the rail breakage detecting function in the embodiment 1 is adopted to judge the state of the axle counting section and process rail breakage information.
Further, the method specifically comprises the following steps:
(1) The first broken rail axle counting information processing CPU judges the number of the axles entering and exiting and the driving direction of the first axle counting sensor and the second axle counting sensor according to the information of the corresponding second output end and the third output end of the first axle counting sensor and the second axle counting sensor;
(2) The second broken rail axle counting information processing CPU judges the number of the axles entering and exiting and the driving direction of the third axle counting sensor and the fourth axle counting sensor according to the information of the corresponding second output end and the third output end of the third axle counting sensor and the fourth axle counting sensor;
(3) When the corresponding shaft inlet number and shaft outlet number of the first shaft counting point and the second shaft counting point are the same, the section state processor judges that the state of the shaft counting section is clear; otherwise, the state is occupied;
(4) When the running direction of the vehicle is the same as the return direction of the steel rails, the first broken rail axle counting information processing CPU calculates the return incremental change states of the two steel rails according to first output end information corresponding to the first axle counting sensor and the second axle counting sensor, and judges whether the steel rails are broken or not;
(5) And when the running direction of the vehicle is opposite to the return direction of the steel rails, the second broken rail axle counting information processing CPU calculates the return incremental change states of the two steel rails according to the first output end information corresponding to the third axle counting sensor and the fourth axle counting sensor, and judges whether the steel rails have broken rails.
The sequence numbers of the steps are only used for convenience in description and understanding; and do not constitute a limitation on the order of execution.
Calculating the return flow increment change states of the two steel rails in the step (4), and judging whether rail breakage exists in the steel rails; the method specifically comprises the following steps:
1) Calculating the relative average value of the currents of the two steel rails, and setting the relative average value as a reference initial value plus an allowable error (Schmidt hysteresis characteristic) of a real-time operation period as I1-0 and I2-0; setting the current relative values of the next operation period as I1 and I2;
2) When (I2/I2-0) <1, (I1/I1-0) >1 or (I2/I2-0) >1, (I1/I1-0) <1; judging that the axle counting section has broken rails.
Calculating the reflux increment change states of the two steel rails in the step (5), and judging whether rail breakage exists in the steel rails; the method specifically comprises the following steps:
a) Calculating the relative average backflow value of the two steel rails, taking the relative average backflow value as a reference initial value plus an allowable error (Schmidt hysteresis characteristic) of the next operation period, and setting the relative average backflow value as I1-0 and I2-0; setting the reflux relative values of the next operation period as I1 and I2;
b) When (I2/I2-0) >1, (I1/I1-0) <1 or (I2/I2-0) <1, (I1/I1-0) >1;
judging that the axle counting section has broken rails.
Example 3:
the axle counting sensor in embodiment 1, referring to fig. 4, includes: a transmitting coil 101, an AC/DC receiving transducer 102, a first receiving coil 103 and a second receiving coil 104;
wherein, the transmitting coil 101 is symmetrically arranged with the first receiving coil 103 and the second receiving coil 104 on the same horizontal axis respectively; the AC/DC receiving sensor 102 is horizontally arranged and is positioned on one side of the transmitting coil 101; the arrangement direction of the transmitting coil 101 and the AC/DC receiving sensor 102 is vertical to the horizontal axis; in practical implementation, the ac/dc receiving sensor 102 is located between the first receiving coil 103 and the second receiving coil 104, and is respectively located at the same distance from the first receiving coil 103 and the second receiving coil 104.
The transmitting coil 101 is formed by winding in the horizontal direction and is used for transmitting an alternating current electromagnetic field; when the alternating electromagnetic field hits the train wheel above the transmitting coil 101, a reflected eddy magnetic field is generated; the first receiving coil 103 and the second receiving coil 104 are wound in the vertical direction and are used for receiving a reflected eddy magnetic field (namely, receiving an alternating current magnetic field in the horizontal direction) generated when a train wheel passes through; the ac/dc receiving sensor 102 is used for receiving a rail return magnetic field in a vertical direction.
The axle counting device is beneficial to sequentially judging the driving direction of wheels and the number of the wheels passing through the sensor structure according to signals output by the first receiving coil 103 and the second receiving coil 104, the alternating current/direct current receiving sensor 102 is used for receiving the magnetic field intensity of the return flow of the steel rail, is suitable for alternating current traction and direct current traction, and is used for detecting the balance degree of the return flow of the steel rail and checking rail breakage. The sensor is simple in structural arrangement, can realize the function of detecting the rail breakage caused by the superposition of the axle counting and has the advantages of integrating the two functions.
In specific implementation, referring to fig. 4, the integrated sensor structure for axle counting and rail breakage detection comprises a signal emission source 108, a transmission coil 101, a first receiving coil 103, a first synchronous detection amplifier 105, a second receiving coil 104, a second synchronous detection amplifier 106, an ac/dc receiving sensor 102, and a differential amplifier 107. The transmitting coil 101, the first receiving coil 103 and the second receiving coil 104 are symmetrically arranged on the same horizontal axis, the transmitting coil 101 is wound in the horizontal direction, the first receiving coil 103 and the second receiving coil 104 are wound in the vertical direction to receive an alternating current magnetic field in the horizontal direction, and the alternating current/direct current receiving sensor 102 is horizontally arranged to receive an alternating current or direct current magnetic field in the vertical direction.
All the components (including the coil, the sensor, the synchronous detection amplifier, the signal emission source and the differential amplifier) are arranged on a fixed bracket, so that the stability of the fixation of the components is ensured. In addition, the transmitting coil 101, the first receiving coil 103 and the second receiving coil 104 are wound on the hollow inductance support to ensure the stability of the parameters.
The AC/DC receiving sensor 102 may be a Hall sensor if it is adapted to AC and DC traction; the coils can be substituted if only ac traction is accommodated.
The working principle is shown in figure 5: the signal emission source 108 emits an alternating current signal through the signal emission coil 101 to emit a high frequency alternating current magnetic field, and simultaneously gives a first synchronous detection control signal 109 to the first synchronous detection amplifier 105 and a second synchronous detection control signal 110 to the second synchronous detection amplifier 106; the magnetic field direction is parallel to the receiving coil (the first receiving coil and the second receiving coil), so no induced voltage is generated in the receiving coil, when a metal object is above the transmitting coil 101, an eddy magnetic field is generated under the action of the transmitting magnetic field and is reflected to the receiving coil, the reflected magnetic field generates a component vertical to the receiving coil, so that the receiving coil generates a high-frequency induced voltage signal, and the first receiving coil 103 and the second receiving coil 104 amplify and detect the received signal through the first synchronous detection amplifier 105 and the second synchronous detection amplifier 106 and supply the amplified signal to a shaft counting signal processor (a shaft counting device) for performing shaft entering and exiting operation. The AC/DC receiving sensor 102 receives vertical magnetic field signals, wherein the signals comprise high-frequency AC signals transmitted by the transmitting coil 101 and 50Hz power frequency or DC signals generated by steel rail backflow, the AC/DC receiving sensor 102 amplifies the received signals through the differential amplifier 107 and then sends the amplified signals to the steel rail backflow balance degree monitoring or rail breakage inspection system, and the DC or 50Hz signals are obtained through filtering processing through the steel rail backflow balance degree monitoring or rail breakage inspection system, represent the characteristics of the steel rail backflow, and can be provided for the steel rail backflow balance degree monitoring or rail breakage inspection to accurately judge rail breakage according to the characteristic signals.
The axle counting signal processor, the rail reflux balance degree monitoring and rail breakage checking system are all products in the market, and detailed description is omitted here. The axle counting signal processor can also be the broken rail axle counting information processing CPU in the embodiment 1; the rail return balance monitoring and rail break inspection system may be the segment status processor of embodiment 1.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. An axle counting system with a broken rail detection function is characterized by being applied to two axle counting points which are separated by a preset distance in an axle counting section; the axle counting system at least comprises: four axle counting sensors, two broken rail axle counting information processing CPUs and a section state processor;
the first axle counting point is provided with a first axle counting sensor and a second axle counting sensor which are symmetrically arranged on one side of the two steel rails; a third axle counting sensor and a fourth axle counting sensor are arranged at the second axle counting point and are symmetrically arranged at one side of the two steel rails; each axle counting sensor is provided with three output ends which are respectively a first output end and used for outputting steel rail backflow information; the second output end and the third output end respectively output the axle counting information corresponding to the axle counting sensor;
the first broken rail axle counting information processing CPU is respectively connected with three output ends of the first axle counting sensor and the second axle counting sensor;
the second broken rail axle counting information processing CPU is respectively connected with three output ends of a third axle counting sensor and a fourth axle counting sensor;
the section state processor is respectively connected with the first broken rail axle counting information processing CPU and the second broken rail axle counting information processing CPU, and is used for judging the state of the axle counting section, processing broken rail information and outputting the state of the axle counting section and the broken rail information.
2. The axle counting system with the rail breakage detecting function according to claim 1, wherein the first broken rail axle counting information processing CPU determines the number of the axles entering and exiting and the traveling direction of the first axle counting sensor and the second axle counting sensor based on information of the corresponding second output end and third output end of the first axle counting sensor and the second axle counting sensor.
3. The axle counting system with the rail breakage detecting function according to claim 2, wherein the second broken rail axle counting information processing CPU determines the number of the axles entering and exiting and the traveling direction of the third axle counting sensor and the fourth axle counting sensor based on information of the corresponding second output end and third output end of the third axle counting sensor and the fourth axle counting sensor.
4. The axle counting system with the rail breakage detecting function according to claim 3, wherein when the vehicle running direction is the same as the rail return direction, the first broken rail axle counting information processing CPU calculates the relative average value of the currents of the two rails according to the first output end information corresponding to the first axle counting sensor and the second axle counting sensor, and the relative average value is used as the reference initial value of the real-time operation period and is set as I1-0 and I2-0; setting the current relative values of the next operation period as I1 and I2;
when (I2/I2-0) <1, (I1/I1-0) >1 or (I2/I2-0) >1, (I1/I1-0) <1; judging that the axle counting section has broken rails.
5. The axle counting system with the rail breakage detecting function according to claim 4, wherein when the vehicle running direction is opposite to the rail backflow direction, the second broken rail axle counting information processing CPU calculates the relative average value of the backflow of the two rails according to the first output end information corresponding to the third axle counting sensor and the fourth axle counting sensor, and the relative average value is used as the reference initial value of the next operation period and is set as I1-0 and I2-0; setting the reflux relative values of the next operation period as I1 and I2;
when (I2/I2-0) >1, (I1/I1-0) <1 or (I2/I2-0) <1, (I1/I1-0) >1; judging that the axle counting section has broken rails.
6. The use method of the axle counting system with the broken rail detection function is characterized in that the axle counting system with the broken rail detection function according to any one of claims 1 to 5 is adopted to judge the state of an axle counting section and process broken rail information.
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| CN115923869B (en) | 2024-07-23 |
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