CN115032280A - Ultrasonic straight probe, ultrasonic sensor, online monitoring system and method - Google Patents

Ultrasonic straight probe, ultrasonic sensor, online monitoring system and method Download PDF

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Publication number
CN115032280A
CN115032280A CN202210726850.4A CN202210726850A CN115032280A CN 115032280 A CN115032280 A CN 115032280A CN 202210726850 A CN202210726850 A CN 202210726850A CN 115032280 A CN115032280 A CN 115032280A
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China
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ultrasonic
monitor
steel rail
rail
probe
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CN202210726850.4A
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Chinese (zh)
Inventor
张博南
黄永巍
吴迪
毕超
胡祺昆
史启帅
李立凡
崔宗文
崔鹤
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Beijing Xintai Zhihe Technology Development Co ltd
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Beijing Xintai Zhihe Technology Development Co ltd
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Priority to CN202210726850.4A priority Critical patent/CN115032280A/en
Publication of CN115032280A publication Critical patent/CN115032280A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • G01N29/2437—Piezoelectric probes
    • G01N29/245—Ceramic probes, e.g. lead zirconate titanate [PZT] probes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
    • B61K9/08—Measuring installations for surveying permanent way
    • B61K9/10—Measuring installations for surveying permanent way for detecting cracks in rails or welds thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The invention relates to an ultrasonic straight probe, an ultrasonic sensor, an online monitoring system and an online monitoring method. The piezoelectric layer of the ultrasonic straight probe adopts 1-3 type PZT/epoxy resin based on lead zirconate titanate piezoelectric ceramic, and the composite material has high electromechanical coupling coefficient and low acoustic impedance characteristic, and shows higher sensitivity and wider bandwidth. An ultrasonic sensor is mounted on the surface of the rail structure for generating and receiving stress wave signals for detecting rail impact damage. Meanwhile, the monitoring device for on-line monitoring of the steel rail adopts solar energy and storage battery for power supply, so that long-term stable work of ultrasonic monitoring in the field can be ensured, and meanwhile, the whole structure is light and compact, and the maintenance and the replacement are convenient. The steel rail on-line monitoring system can stably monitor and detect the development degree of crack defects in the steel rail for a long time under the condition of ensuring unattended operation, and has high use value.

Description

Ultrasonic straight probe, ultrasonic sensor, online monitoring system and method
Technical Field
The invention belongs to the field of on-line (in-service) damage monitoring of railway steel rails in the traffic industry, and particularly relates to an ultrasonic straight probe, an ultrasonic sensor, an on-line monitoring system and an on-line monitoring method.
Background
The integrity of critical structures such as railroads, aircraft, pressure vessels, etc. need to be continuously monitored to prevent catastrophic failure. In order to cope with any possible damage that leads to failure of the structure, a monitoring evaluation should be performed even though the structure may be in use. Traditional non-destructive testing/evaluation (NDT/NDE) techniques cannot be directly applied to monitoring the health of structures because these techniques are typically based on laboratory tests, requiring bulky instruments. Structural Health Monitoring (SHM) systems with integrated sensors, referred to as intelligent SHM systems, have attracted extensive attention over the past decades. In addition to sensors, emitters or actuators, whose function is to excite diagnostic signals, can also be implanted in structures to build active SHM systems. Active SHM systems may increase the likelihood of inferring structural states from collected sensor data. One of the main problems in constructing an active SHM system is selecting the appropriate monitoring signal. Although in general any physical signal can be used to monitor structural health, ultrasonic stress waves have been considered the primary method in active SHM systems, unlike diagnostic signals in other NDT detection schemes such as percolation, eddy current, X-ray detection, etc. The technology of integrating the sensor on the monitoring structure is applied to Structural Health Monitoring (SHM), and has good monitoring performance. At present, in order to solve the safety problem of the in-service steel rail, an ultrasonic stress wave sensor is urgently needed to be integrated into the surface structure of the steel rail.
In ultrasonic stress wave monitoring systems, ultrasonic stress wave based testing can potentially detect various types of damage (e.g., corrosion, delamination, cracks, not only on the surface, but also hidden inside the structure) and can increase the ability to detect small damage by increasing the frequency of the diagnostic signal. The traditional stress wave monitoring method is a monitoring method based on ultrasonic lamb waves, the difficulty of the monitoring method is that signals cannot clearly analyze the propagation path of the sound waves due to the dispersion characteristic and the complex mode conversion phenomenon of the signals, and the analysis difficulty is further increased due to the interaction between a mounting structure and a sensor in an intelligent SHM structure. The algorithm for monitoring and identifying the damage depends on the generation and receiving method of the lamb wave, and is relatively complex.
Disclosure of Invention
In order to overcome the above defects in the prior art, the present invention provides an ultrasonic straight probe, an ultrasonic sensor and a system, which are used for solving the above problems in the prior art.
An ultrasonic straight probe comprises a shell, and a matching layer, a piezoelectric layer, a back lining layer and an electrode plate which are arranged in the shell in sequence,
wherein the negative surface of the piezoelectric layer is connected to the matching layer; the positive electrode surface of the piezoelectric layer is connected with the backing layer;
the electrode plate is arranged between the surface of the negative electrode and the matching layer, and a negative electrode lead is arranged on the electrode plate;
a positive electrode lead is arranged on the positive electrode surface of the piezoelectric layer;
the piezoelectric layer is made of a lead zirconate titanate piezoelectric ceramic layer.
The above aspects and any possible implementations further provide an implementation in which the lead zirconate titanate piezoelectric ceramic layer is a PZT/epoxy resin type 1-3.
The above aspects and any possible implementation manner further provide an implementation manner, and the electrode sheet is a copper foil with a thickness of 2-10 micrometers and a width of 2-4 millimeters.
The above aspects and any possible implementations further provide an implementation where the matching layer has a thickness of 100 and 200 microns.
The above aspects and any possible implementations further provide an implementation, further including a connector disposed on an inner wall of the housing, where the connector includes a positive slot, a negative slot, and an output slot, where the positive slot and the negative slot are connected to the positive lead and the negative lead, respectively; and an ultrasonic straight probe line is arranged in the output slot.
The invention also provides an ultrasonic sensor which comprises a support and the ultrasonic straight probe provided by the invention, wherein the ultrasonic straight probe is arranged on the support.
The above aspect and any possible implementation manner further provide an implementation manner, wherein the supporting member includes a supporting inclined surface, and an included angle between the supporting inclined surface and the horizontal direction is 40-80 degrees.
The invention also provides a steel rail online monitoring system which comprises a monitoring device, a remote server and a plurality of ultrasonic sensors, wherein the ultrasonic sensors are arranged on the steel rail, probe lines of the ultrasonic sensors are connected with the monitoring device, and the monitoring device is wirelessly connected with the remote server.
The aspect and any possible implementation manner described above further provide an implementation manner, the monitoring device includes a solar panel, a support, a monitor, a housing and a battery, wherein the solar panel is disposed on the top end of the support, the housing is disposed on the support, the monitor and the battery are disposed in the housing, the monitor is connected to a plurality of ultrasonic sensors, the monitor is connected to one end of the battery, and the other end of the battery is connected to the solar panel.
The invention also provides a steel rail online monitoring method, which is realized by adopting the monitoring system provided by the invention and comprises the following steps:
s1, arranging a plurality of pairs of ultrasonic sensors on the bottom side of a steel rail, the welding seam surface, the rail bottom triangular area, the rail waist and the rail jaw triangular area;
s2, arranging a monitoring device at a certain distance from a steel rail, and connecting each channel of the monitor with a probe line of the ultrasonic sensor;
s3, starting a monitoring device to supply power to the monitor and the ultrasonic sensors, wherein each ultrasonic sensor sends diffraction wave signals of the steel rail measured on line to the monitor;
and S4, the monitor sends all the acquired diffraction wave signals to a remote server, and the defects of the steel rail are monitored on line in real time according to the diffraction wave signals.
The invention has the advantages of
The piezoelectric layer of the ultrasonic straight probe adopts 1-3 type PZT/epoxy resin based on lead zirconate titanate piezoelectric ceramic, and the composite material has high electromechanical coupling coefficient and low acoustic impedance characteristic, and shows higher sensitivity and wider bandwidth. An ultrasonic sensor is mounted on the surface of the rail structure for generating and receiving stress wave signals for detecting rail impact damage. Meanwhile, the monitoring device for on-line monitoring of the steel rail adopts solar energy and storage battery for power supply, so that long-term stable work of ultrasonic monitoring in the field can be ensured, and meanwhile, the whole structure is light and compact, and the maintenance and the replacement are convenient. The steel rail on-line monitoring system can stably monitor and detect the development degree of crack defects in the steel rail for a long time under the condition of ensuring unattended operation, and has high use value.
Drawings
Fig. 1 is a schematic structural diagram of an ultrasonic straight probe in an embodiment of the present invention;
FIG. 2 is a schematic diagram of an ultrasonic sensor according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a monitoring device according to an embodiment of the present invention;
FIG. 4 is a schematic view of an ultrasonic sensor disposed on a steel rail according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating the fixing of the ultrasonic sensor to the steel rail according to the embodiment of the present invention.
Detailed Description
In order to better understand the technical solution of the present invention, the present disclosure includes but is not limited to the following detailed description, and similar techniques and methods should be considered as within the scope of the present invention. In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
It should be understood that the described embodiments of the invention are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Fig. 1 shows a structure of an ultrasonic straight probe of the present invention, which includes a matching layer 1, a piezoelectric layer 2, a backing layer 3 and an electrode sheet, wherein the negative electrode surface of the piezoelectric layer 2 is connected to the matching layer 1; the positive electrode surface of the piezoelectric layer 2 is connected with the backing layer 3; the electrode plate is arranged between the negative electrode surface of the piezoelectric layer 2 and the matching layer 1, and a negative electrode lead 5 is arranged on the electrode plate; the positive electrode surface of the piezoelectric layer 2 is provided with a positive electrode lead 4. Since the piezoelectric material itself exhibits a much higher acoustic impedance than the usual acoustic loading, such as wedge-shaped delay blocks used in industrial non-destructive testing, a significant portion of the acoustic energy is lost, and if not acoustically matched correctly, resolution and sensitivity are also degraded, and the matching layer 1 disposed between the piezoelectric layer 2 of piezoelectric material and the loading material can significantly improve probe performance. The backing layer 3 is another important component of the piezoelectric ultrasound probe. Due to the acoustic mismatch between air and the piezoelectric material, the reflected waves will ring back inside the probe, which will cause a long-term ring down of the ultrasonic pulse, creating a ringing effect. Therefore, in order to avoid such ringing effect and improve the quality of the echo signal, the backing layer 3 of the present invention is selected from a highly attenuating, high-density material for controlling the vibration of the ultrasonic straight probe by absorbing the energy radiated from the back of the active element. The backing material is a mixture of iron oxide and tungsten powder, sized to match the piezoelectric layer 2. The piezoelectric layer 2 is made of a piezoelectric composite material of round lead zirconate titanate piezoelectric ceramic 1-3 type PZT/epoxy resin, and the size is 4-10mm, preferably 8mm in diameter. The thickness of the matching layer 1 is 100-200 microns, and the thickness of 140 microns is preferred in the invention, and is selected to enable the matched piezoelectric layer 2 to obtain a narrower pulse echo signal and improve the resolution. Bonding and uniformly coating the negative electrode surface of the piezoelectric layer 2 and the matching layer 1 by using an Ivada AV138MV998 epoxy adhesive to ensure that no air bubbles exist, arranging a copper foil with the thickness of 2-10 micrometers and the width of 2-4 millimeters, preferably arranging a copper foil with the thickness of 5 micrometers and the width of 1 millimeter between the negative electrode surface of the piezoelectric layer 2 and the matching layer 1 to lead out a negative electrode lead 5, and welding the copper foil to form the negative electrode lead 5 again after the AV138MV998 epoxy adhesive is completely cured; welding a positive lead 4 on the positive surface of the piezoelectric layer 2, namely directly welding the positive lead 4 on the positive surface of the piezoelectric layer 2 without adopting a copper foil; then pouring a back lining layer 3 on the positive surface of the piezoelectric layer 2, and monitoring the waveform and the frequency spectrum while curing; finally, the bonded, welded and cast combination of the matching layer 1, the piezoelectric layer 2 and the backing layer 3 is placed in a housing 6, and the housing 6 is made of stainless steel material to protect the devices inside from damage and prevent external interference. The inner wall of the stainless steel shell 6 is provided with a connector 7, the C5 connector is preferred in the invention, the connector 7 comprises an anode slot, a cathode slot and an output slot, wherein the anode slot and the cathode slot are respectively connected with the anode lead 4 and the cathode lead 5; the ultrasonic straight probe is arranged in the output slot, the C5 connector is a standard connector female head, and a C5 connector male head is adopted at the end of the probe wire to be in splicing fit with the connector female head. The positive lead 4 and the negative lead 5 are connected with a connector 7, a probe line is led out from the prepared ultrasonic straight probe at the connector 7 and is used for being connected with a following monitor to transmit signals detected by the ultrasonic straight probe, and meanwhile, the stainless steel shell 6 protects the positive lead and the negative lead and reduces electric noise from surrounding electromagnetic waves. The ultrasonic straight probe manufactured by the method has good bandwidth and cycle characteristics, so that the straight probe has good resolution, and can better generate ultrasonic diffracted wave signals after being combined with a wedge block.
Preferably, as shown in fig. 2, an embodiment of the present invention further provides an ultrasonic sensor, which includes an ultrasonic straight probe and a supporting member, where the supporting member is implemented by selecting a wedge 8 in the present invention, and a direction of a diffracted wave signal generated by the ultrasonic straight probe is relatively fixed, so that uneven distribution of the signal is easily caused during monitoring, and the wedge 8 is selected in the present invention to diffuse the diffracted wave signal of the ultrasonic straight probe, so as to generate diffracted wave signals diffused at different angles, so that the monitoring effect is affected by the different angles during monitoring, and a threaded hole is formed in the wedge 8, and the ultrasonic straight probe and the wedge 8 are connected through the threaded hole. Specifically, an ultrasonic straight probe is screwed on a wedge 8, the wedge 8 is connected with the ultrasonic straight probe, the wedge 8 comprises a supporting inclined surface, and an included angle between the supporting inclined surface and the horizontal direction is 40-80 degrees. Therefore, the ultrasonic straight probe and the wedge are matched to form the diffraction ultrasonic sensor, wherein the diffraction wave ultrasonic probe based on the 1-3 composite material of PZT/epoxy resin has a good damping effect and relatively short waveform duration, high-resolution monitoring of defects in the steel rail is facilitated, diffraction waves at different angles are generated through waveform conversion of the wedge, monitoring ranges are different due to different angles, and a determined angle is selected for monitoring according to the range of the damage.
Preferably, an embodiment of the present invention further provides an online rail monitoring system, which includes a monitoring device, a rail and a plurality of ultrasonic sensors, wherein all the ultrasonic sensors are disposed on the rail, as shown in fig. 3, the monitoring device includes a solar panel 9, a bracket 10, a monitor, a housing 11 and a battery, wherein the solar panel 9 is disposed on the top end of the bracket 10, the housing 11 is disposed on the bracket 10, the monitor and the battery are disposed in the housing 11, the monitoring device is disposed in the field, the monitor and all the ultrasonic sensors are powered by the solar panel 9, so that the monitor is guaranteed to work normally under low power, for this reason, the monitor of the present invention employs a 32-channel low-power ultrasonic flaw detector, each channel is connected with one ultrasonic sensor, and the ultrasonic sensors are connected by probe lines, so as to ensure long-time work and operation, the shell 11 adopts a waterproof design, so that the monitor and the battery are prevented from being drenched, and the situation that the distance from the steel rail is too close to influence the driving safety is avoided.
Preferably, an embodiment of the present invention further provides an online rail monitoring method, which is implemented by using the monitoring system of the present invention, and includes the following steps:
(1) and a plurality of pairs of ultrasonic sensors are arranged on the bottom side, the welding seam face, the rail bottom triangular area, the rail waist and the rail jaw triangular area of the steel rail, specifically, as shown in fig. 4, the ultrasonic sensors are arranged on the steel rail, specifically, the ultrasonic sensors are installed and adhered on the steel rail, two pairs of ultrasonic sensors are respectively arranged at the position of the bottom side 12 of the steel rail, two pairs of ultrasonic sensors are also arranged at the position of the other corresponding side, which is the same as the position of the bottom side 12, and are used for monitoring the bottom surface of the steel rail, wherein one pair of ultrasonic sensors which is arranged at a position close to the center of the welding seam face 13 on the steel rail is used for monitoring shallow defects, and one pair of ultrasonic sensors which is far away from the center of the welding seam face 13 is used for monitoring deep defects. According to the method, a pair of ultrasonic sensors is respectively arranged on two sides of a rail bottom triangular area of a steel rail, three pairs of ultrasonic sensors are respectively arranged on two sides of a rail web, a pair of ultrasonic sensors is respectively arranged on two sides of a rail jaw triangular area, a glue bonding method is adopted during arrangement, and a Hangao 4070 epoxy resin structure cast resin glue is adopted for bonding in consideration of the limitation of operation time, so that the bonding glue has high transmissivity and tensile coefficient, is rapidly cured in one minute, is completely cured in twenty-four hours, and is firmly bonded;
(2) set up monitoring devices in certain distance department apart from the rail, with each passageway of monitor with ultrasonic sensor's probe line is connected, and each passageway in 32 passageways of monitor among the monitoring devices all is connected with each ultrasonic sensor's probe line, specifically adopts the public head of C5 connector, and the monitor is connected to one end, and the other end is connected the female head of C5 connector of the straight probe of supersound on the wave sensor for be connected with the probe line.
(3) Starting a monitoring device to supply power to the monitor and the ultrasonic sensors, wherein each ultrasonic sensor sends diffraction wave signals of the steel rail measured on line to the monitor; the monitor starts to work after power is supplied, each channel starts to collect on-line ultrasonic diffraction wave signals measured by the ultrasonic sensor, and the ultrasonic diffraction wave signals collected by all the channels are stored;
s4, the monitor sends all the acquired diffracted wave signals to a remote server, the defects of the steel rail are monitored online in real time according to the diffracted wave signals, specifically, an internet of things card is adopted by the monitor to be transmitted to the remote server in a wireless mode, the remote server alarms the detected defects in real time according to the received diffracted wave signals, the alarm position is marked and displayed on a map of a display interface of the remote server, and a manager is informed of finding out the signal change of a monitoring point, so that the aim of quickly and timely responding is achieved. By the method, all the ultrasonic sensors and the monitoring devices arranged on the steel rail can monitor the development condition of the crack defect in the steel rail in real time for a long time, prevent the steel rail from being broken due to the expansion of the crack defect and ensure the safe and reliable operation of railway transportation.
Preferably, as shown in fig. 5, in the embodiment of the present invention, a cover plate 15 is further provided for protecting the ultrasonic sensor to be bonded to the rail, since the cover plate 15 can be moved to adjust the tightness of the fixing screw 16 in consideration of the change of the on-site welding seam, so as to ensure that the cover plate 15 can move left and right, the cover plate 15 is moved to a position where the cover plate can completely wrap and protect the ultrasonic sensor, and the ultrasonic sensor is prevented from being damaged due to exposure outside, and then the screw 16 is tightened, so that the ultrasonic sensor is not exposed, and the driving safety is ensured.
Preferably, in order to avoid line damage, the probe lines of the ultrasonic sensors are led out from the underground of the track, connected with the monitor, used for debugging the signal input of the ultrasonic sensors and the monitor, and used for observing the signal coupling state through the monitor and fixing the monitoring ultrasonic sensors to realize the perfect acquisition of ultrasonic signals.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. An ultrasonic straight probe is characterized by comprising a shell, and a matching layer, a piezoelectric layer, a back lining layer and an electrode plate which are arranged in the shell in sequence,
wherein the negative surface of the piezoelectric layer is connected to the matching layer; the positive electrode surface of the piezoelectric layer is connected with the backing layer;
the electrode plate is arranged between the surface of the negative electrode and the matching layer, and a negative electrode lead is arranged on the electrode plate;
a positive electrode lead is arranged on the positive electrode surface of the piezoelectric layer;
the piezoelectric layer is made of a lead zirconate titanate piezoelectric ceramic layer.
2. The ultrasonic direct probe of claim 1, wherein the lead zirconate titanate piezoceramic layer is a type 1-3 PZT/epoxy resin.
3. The ultrasonic straight probe of claim 1, wherein the electrode sheet is a copper foil 2-10 microns thick and 2-4 mm wide.
4. The ultrasonic straight probe of claim 1, wherein the matching layer has a thickness of 100 and 200 microns.
5. The ultrasonic direct probe according to claim 1, further comprising a connector disposed on an inner wall of the housing, wherein the connector comprises a positive socket, a negative socket and an output socket, wherein the positive socket and the negative socket are respectively connected to the positive lead and the negative lead; and an ultrasonic straight probe line is arranged in the output slot.
6. An ultrasonic transducer, characterized in that the transducer comprises a support and an ultrasonic straight probe according to any one of claims 1-5, which is arranged on the support.
7. The ultrasonic sensor of claim 6, wherein the supporting member comprises a supporting inclined surface, and the angle between the supporting inclined surface and the horizontal direction is 40-80 degrees.
8. A steel rail on-line monitoring system is characterized by comprising a monitoring device, a remote server and a plurality of ultrasonic sensors according to any one of claims 6 to 7, wherein the ultrasonic sensors are arranged on a steel rail, probe lines of the ultrasonic sensors are connected with the monitoring device, and the monitoring device is wirelessly connected with the remote server.
9. The steel rail online monitoring system according to claim 8, wherein the monitoring device comprises a solar panel, a support, a monitor, a housing and a battery, wherein the solar panel is arranged at the top end of the support, the housing is arranged on the support, the monitor and the battery are arranged in the housing, the monitor is connected with a plurality of ultrasonic sensors, the monitor is connected with one end of the battery, and the other end of the battery is connected with the solar panel.
10. An on-line monitoring method for steel rails, which is realized by the monitoring system of any one of claims 8 to 9, and comprises the following steps:
s1, arranging a plurality of pairs of ultrasonic sensors on the bottom side of a steel rail, the welding seam surface, the rail bottom triangular area, the rail waist and the rail jaw triangular area;
s2, arranging a monitoring device at a certain distance from a steel rail, and connecting each channel of the monitor with a probe line of the ultrasonic sensor;
s3, starting a monitoring device to supply power to the monitor and the ultrasonic sensors, wherein each ultrasonic sensor sends diffraction wave signals of the steel rail measured on line to the monitor;
and S4, the monitor sends all the acquired diffraction wave signals to a remote server, and the defects of the steel rail are monitored on line in real time according to the diffraction wave signals.
CN202210726850.4A 2022-06-24 2022-06-24 Ultrasonic straight probe, ultrasonic sensor, online monitoring system and method Pending CN115032280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210726850.4A CN115032280A (en) 2022-06-24 2022-06-24 Ultrasonic straight probe, ultrasonic sensor, online monitoring system and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210726850.4A CN115032280A (en) 2022-06-24 2022-06-24 Ultrasonic straight probe, ultrasonic sensor, online monitoring system and method

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CN115032280A true CN115032280A (en) 2022-09-09

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