CN207488235U - The damage monitoring device and its monitoring of structures of a kind of Motor train unit body sleeper beam - Google Patents
The damage monitoring device and its monitoring of structures of a kind of Motor train unit body sleeper beam Download PDFInfo
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- CN207488235U CN207488235U CN201721441492.3U CN201721441492U CN207488235U CN 207488235 U CN207488235 U CN 207488235U CN 201721441492 U CN201721441492 U CN 201721441492U CN 207488235 U CN207488235 U CN 207488235U
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Abstract
The utility model is related to the damage monitoring device and its monitoring of structures of a kind of Motor train unit body sleeper beam, wherein, monitoring of structures includes the monitoring unit of the region surface to be monitored set on sleeper beam；Monitoring unit includes：Temperature sensor, for monitoring the temperature in region to be monitored, to carry out temperature-compensating to monitoring result；For excite region surface to be monitored with generate signal or acquisition signal, for acquiring the PZT (piezoelectric transducer) of signal and corresponding forming monitoring path, and each monitoring path envelope region to be monitored between the PZT (piezoelectric transducer) of signal for exciting region surface to be monitored to generate.The monitoring of structures is monitored the region to be monitored of sleeper beam by PZT (piezoelectric transducer), meanwhile, it is additionally arranged temperature sensor, by the way of temperature-compensating, weaken due to temperature change it is larger caused by influence, improve the accuracy of monitoring result, avoid that there are security risks.
Description
Technical field
The utility model is related to vehicle structure monitoring technical fields, and in particular to a kind of damage prison of Motor train unit body sleeper beam
Survey device and its monitoring of structures.
Background technology
At present, EMU O＆M is generally aided with " on-line monitoring " using the planned maintenance of " utilization overhaul+advanced maintenance "
Efficient public security system, the non-destructive monitorings technology such as the former extensive utilization ultrasound, infiltration, the main monitoring voltage of the latter, speed, temperature
Deng the physical parameter of reflection vehicle operating index.
Structural health monitoring technology by analyzing the collected signal of sensing network, extracts structural information, judges structure
The technology of state and integrality, being capable of real-time, online, automatic monitoring of structures degeneration or damage.Both at home and abroad to monitoring structural health conditions
Technology includes piezoelectric intelligent monitoring technology, sound hair in the key technology that the application study of rail vehicle key components and parts structure is related to
Penetrate technology, fiber grating Condition Monitoring Technology, signal processing and status recognition technique, intelligent diagnostics and health assessment technology etc..
The one kind of piezoelectric intelligent monitoring technology as structural health monitoring technology can carry out area monitoring, be easy to and structure fusion,
It is widely used in composite material and Metal Structure Damage monitoring.
But in the method in the prior art, being monitored to structural damage by PZT (piezoelectric transducer), since monitoring of environmental is more
In interior, environmental condition is stablized relatively, therefore does not account for influence of the temperature to monitoring result, but the variation of temperature can make
The phenomenon that structure is expanded with heat and contract with cold is obtained, influences the propagation of the wave in structure to be monitored, and then influence the essence of structure damage monitoring
Degree.
Sleeper beam is located on the chassis of Motor train unit body, is the critical component of car body carrying, to ensure the peace of EMU operation
Complete reliable, the structural health of sleeper beam, which is monitored, just seems particularly necessary.EMU in the process of running, due to external environment
In running order electric component when the variation of temperature or such as train operation generates heat so that sleeper beam is stopping with EMU
The temperature difference of sleeper beam under state is larger, therefore, damage monitoring is carried out without considering temperature to sleeper beam according to PZT (piezoelectric transducer)
The factor of degree, there will be larger deviations for monitoring result, and there are larger security risks.
Utility model content
The purpose of this utility model is to provide the damage monitoring device and its monitoring of structures of a kind of Motor train unit body sleeper beam, leads to
PZT (piezoelectric transducer) is crossed to be monitored the region to be monitored of sleeper beam, meanwhile, temperature sensor is additionally arranged, using the side of temperature-compensating
Formula, weaken due to temperature change it is larger caused by influence, improve the accuracy of monitoring result, avoid that there are security risks.
In order to solve the above technical problems, the prison of the damage monitoring device of Motor train unit body sleeper beam provided by the utility model
Geodesic structure includes the monitoring unit of the region surface to be monitored set on sleeper beam；The monitoring unit includes：Temperature sensor is used for
The temperature in the region to be monitored is monitored, to carry out temperature-compensating to monitoring result；Multiple PZT (piezoelectric transducer)s, it is described for exciting
Region surface to be monitored is to generate signal or acquisition signal, for acquiring the PZT (piezoelectric transducer) of signal and corresponding use
Monitoring path, and each prison are formed between the PZT (piezoelectric transducer) of the region surface to be monitored to generate signal is excited
Survey region to be monitored described in the envelope of path.
Wherein, key area of the region to be monitored for sleeper beam, such as the region that welding region, stress are easily concentrated, pillow
Beam may include multiple regions to be monitored, and the surface in each region to be monitored is equipped with monitoring unit.Monitoring unit includes multiple piezoelectricity
Energy converter, PZT (piezoelectric transducer) can be used as actuator, will using its inverse piezoelectric effect for exciting the region surface to be monitored
Voltage excitation signals are changed into the stress Lamb wave (Lamb wave) propagated in sleeper beam structure, that is, generate signal, meanwhile, piezoelectric energy-conversion
Device can be used as sensor again, for acquiring signal, mechanical oscillation signal is changed into voltage signal using its piezoelectric effect and is exported,
As monitoring road can be formed between the PZT (piezoelectric transducer) and the PZT (piezoelectric transducer) as actuator corresponding thereto of sensor
Diameter, monitoring path proximity ellipse, has certain area.Meanwhile same PZT (piezoelectric transducer) can both be used as start simultaneously
Device and sensor, therefore a plurality of monitoring path can be formed between multiple PZT (piezoelectric transducer)s, and a plurality of monitoring path will form and wrap
The monitoring net in network region to be monitored, the monitoring net can cover region to be monitored comprehensively, to treat the structural damage in monitoring region
Situation carries out comprehensive monitoring.
Meanwhile the monitoring unit further includes temperature sensor, and when PZT (piezoelectric transducer) acquires current demand signal, temperature sensor
Synchronous acquisition Current Temperatures determine current baseline signal corresponding with the Current Temperatures in benchmark database according to Current Temperatures,
Damage index is calculated by current demand signal and current baseline signal, judges the structural damage situation in the region to be monitored.Namely
It says, when calculating damage index, temperature-compensating has been carried out to background signal, effectively weaken since temperature change is larger for pressure
Influence of the electric transducer to damage monitoring, even environment temperature change, and will not influence the accuracy of monitoring result, carry
The accuracy of high damage monitoring result, avoids that there are security risks.
Optionally, each monitoring unit includes Kapton, the PZT (piezoelectric transducer) and the temperature sensing
Device is embedded in the Kapton.
Optionally, the Kapton is adhesively fixed with the region to be monitored.
Optionally, the region to be monitored includes：
First region to be monitored, the welding region between the web of the sleeper beam and through tube；
Second region to be monitored, the welding region between the lower cover of the sleeper beam and center pin mount；
Third region to be monitored：Welding region between the web and draw beam；
4th region to be monitored：Welding region between the web and pillow interior beam.
Optionally, in the monitoring unit in the described first region to be monitored, the PZT (piezoelectric transducer) is along weld seam
Upside, left side and right side are set on the web.
Optionally, in the monitoring unit in the described second region to be monitored, the PZT (piezoelectric transducer) is all along weld seam
To equipped with two circle, be disposed far from the center pin mount outer ring PZT (piezoelectric transducer) for excite the second region to be monitored with
Signal is generated, the PZT (piezoelectric transducer) for being provided close to the inner ring of the center pin mount is used to acquire signal.
Optionally, the number of the PZT (piezoelectric transducer) set on the inner ring is less than set on the quantity of the PZT (piezoelectric transducer) of the outer ring
Amount.
Optionally, the monitoring unit further includes three-dimensional acceleration transducer, for monitoring shaking for the region to be monitored
Dynamic acceleration, to carry out vibration acceleration compensation to monitoring result.
Optionally, humidity sensor is further included, for monitoring humidity condition, to carry out humidity compensation to monitoring result.
In addition, the utility model additionally provides a kind of damage monitoring device of Motor train unit body sleeper beam, including as above institute
The monitoring of structures and controller stated；There is background signal benchmark database corresponding with temperature the inside of the controller, point
It is not connect by conducting wire with the temperature sensor and each PZT (piezoelectric transducer), for controlling each PZT (piezoelectric transducer) excitation
The region to be monitored passes through what base-line method was monitored with reference to the temperature sensor to generate signal or acquisition current demand signal
The corresponding background signal of Current Temperatures analyzes the degree of impairment in the region to be monitored.
Controller is used for Memory Reference database, and controls the PZT (piezoelectric transducer) as actuator with specific driving frequency
Region to be monitored is excited to generate signal, and while control acquires signal as the PZT (piezoelectric transducer) of sensor, control temperature
Sensor acquisition Current Temperatures are spent, background signal corresponding with the Current Temperatures in benchmark database is determined with reference to Current Temperatures,
Damage index is calculated finally by current demand signal and current baseline signal, judges the structural damage situation in the region to be monitored.
The damage monitoring device is similar with the technique effect acquired by above-mentioned monitoring of structures, to save length, herein no longer
It repeats.
Description of the drawings
Fig. 1 is the installation of the monitoring of structures of the damage monitoring device for the EMU sleeper beam that the utility model embodiment is provided
Structure diagram；
Fig. 2 is the structure diagram of the first monitoring unit in Fig. 1；
Fig. 3 is the structure diagram of the second monitoring unit in Fig. 1；
Fig. 4 is the structure diagram of third monitoring unit in Fig. 1；
Fig. 5 is the structure diagram of the 4th monitoring unit in Fig. 1；
Fig. 6 is the structure diagram of the 5th monitoring unit in Fig. 1.
In attached drawing 1-6, the reference numerals are as follows：
1- sleeper beams, 11- webs, 12- through tubes, 13- lower covers, 14- centers pin mount, 15- draw beams, 16- pillow in
Longeron；
The first monitoring unit of 211-, the second monitoring unit of 212-, 221- third monitoring unit, the 4th monitoring unit of 222-,
The 5th monitoring unit of 23-；24- PZT (piezoelectric transducer)s, 25- Kaptons.
Specific embodiment
In order to which those skilled in the art is made to more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and have
The utility model is described in further detail for body embodiment.
Please refer to Fig.1 the prison that -6, Fig. 1 is the damage monitoring device for the EMU sleeper beam that the utility model embodiment is provided
The mounting structure schematic diagram of geodesic structure；Fig. 2 is the structure diagram of the first monitoring unit in Fig. 1；Fig. 3 is the second monitoring in Fig. 1
The structure diagram of unit；Fig. 4 is the structure diagram of third monitoring unit in Fig. 1；Fig. 5 is the 4th monitoring unit in Fig. 1
Structure diagram；Fig. 6 is the structure diagram of the 5th monitoring unit in Fig. 1.
The utility model embodiment provides the damage monitoring device and its monitoring of structures of a kind of Motor train unit body sleeper beam 1,
The damage monitoring device includes monitoring of structures and controller, wherein, as shown in Figure 1, monitoring of structures includes waiting to supervise set on sleeper beam 1
The monitoring unit of region surface is surveyed, wherein, region to be monitored is the key area of sleeper beam 1, as welding region, stress easily collect
In region etc., sleeper beam 1 may include multiple regions to be monitored, and the surface in each region to be monitored is equipped with monitoring unit.
Monitoring unit includes temperature sensor (not shown) and multiple PZT (piezoelectric transducer)s 24, and the inside of controller has
Background signal benchmark database corresponding with temperature, is connected respectively by conducting wire and temperature sensor and each PZT (piezoelectric transducer) 24
It connects, is used to each PZT (piezoelectric transducer) 24 be controlled to excite region to be monitored to generate signal or acquisition current demand signal, and pass through baseline
The corresponding background signal of Current Temperatures that method combination temperature sensor is monitored analyzes the degree of impairment in region to be monitored.
Specifically, PZT (piezoelectric transducer) 24 can be used as actuator, for exciting region surface to be monitored, using it against piezoelectricity
Voltage excitation signals are changed into the stress Lamb wave (Lamb wave) in 1 structure-borne of sleeper beam by effect, that is, generate signal, meanwhile,
PZT (piezoelectric transducer) 24 can be used as sensor again, and for acquiring signal, mechanical oscillation signal is changed into electricity using its piezoelectric effect
Signal output is pressed, as between the PZT (piezoelectric transducer) 24 and the PZT (piezoelectric transducer) 24 as sensor corresponding thereto of actuator
Monitoring path can be formed, monitoring path proximity ellipse has certain area.Meanwhile same PZT (piezoelectric transducer) 24
Both it can be used as actuator and sensor simultaneously, therefore a plurality of monitoring path can be formed between multiple PZT (piezoelectric transducer)s 24, and more
The monitoring net that item monitoring path will form envelope region to be monitored, which can cover region to be monitored comprehensively, to treat
The structural damage situation for monitoring region carries out comprehensive monitoring.
In the present embodiment, the relative position of each PZT (piezoelectric transducer) 24 needs to set, and for the specific position of temperature sensor
It puts and does not require, as long as the temperature in its energy accurate measurements region to be monitored.
Controller controls the PZT (piezoelectric transducer) 24 as actuator region to be monitored to be excited to produce with specific driving frequency
Raw signal, and while control acquires signal as the PZT (piezoelectric transducer) 24 of sensor, the acquisition of Synchronization Control temperature sensor
Current Temperatures, and determine current baseline signal corresponding with the Current Temperatures in benchmark database according to Current Temperatures, by working as
Front signal and current baseline signal calculate damage index, judge the structural damage situation in the region to be monitored.That is, counting
When calculating damage index, temperature-compensating is carried out to background signal, has effectively been weakened since temperature change is larger for piezoelectric energy-conversion
Influence of the device 24 to damage monitoring, even environment temperature change, and will not influence the accuracy of monitoring result, improve damage
Hinder the accuracy of monitoring result, avoid that there are security risks.
In the above-described embodiments, each monitoring unit includes Kapton 25, PZT (piezoelectric transducer) 24 and temperature sensing
Device is embedded in Kapton 25.During installation, PZT (piezoelectric transducer) 24 and temperature sensor are first arranged in polyimides
In film 25, after the position of each PZT (piezoelectric transducer) 24 and spacing are fixed, Kapton 25 is fixed on region to be monitored
Surface, it is easy for installation.The chemical property of Kapton 25 is stablized, high temperature resistant, corrosion-resistant, and flame retardant effect compared with
It is good, and PZT (piezoelectric transducer) 24, temperature controller need to be connect by conducting wire with the controller positioned at outside, Kapton 25
While being arranged on the design convenient for cabling, certain protection can be played to conducting wire and PZT (piezoelectric transducer) 24, temperature sensor
Effect.
In the present embodiment, the side that the Kapton 25 of PZT (piezoelectric transducer) 24 and temperature sensor passes through bonding would be embedded with
Formula is fixed on the surface in region to be monitored, to be monitored to it.Certainly, in the present embodiment, to its fixed form not
It is limited, can also be fixed by other connection modes, such as be threadedly coupled, riveting, but the stationary phase pair by way of bonding
For other manner fixation, change will not be made to 1 structure of sleeper beam, ensures the integrality of 1 structure of sleeper beam, and then is not interfered with
Its strength and stiffness.
In the above-described embodiments, the region to be monitored of sleeper beam 1 includes but not limited to following four region to be monitored：First treats
Monitor region：Welding region between the web 11 of sleeper beam 1 and through tube 12；Second region to be monitored：Positioned at sleeper beam 1
Welding region between lower cover 13 and center pin mount 14；Third region to be monitored：Positioned at web 11 and draw beam 15 it
Between welding region；4th region to be monitored：Welding region between web 11 and pillow interior beam 16；Each region to be monitored
It is respectively equipped with monitoring unit.
Wherein, multiple PZT (piezoelectric transducer)s 24 are respectively equipped with, and multiple piezoelectricity change in the monitoring unit in each region to be monitored
The a plurality of monitoring path formed between energy device 24 can form the monitoring net in the envelope region to be monitored, and cover comprehensively to be monitored
Region, so that the structural damage situation to each region to be monitored is comprehensively monitored.Therefore, for the pressure in each region to be monitored
The quantity of electric transducer 24 does not require, and theoretically, the result of the more monitorings of quantity is more comprehensive, if but between PZT (piezoelectric transducer) 24
Away from too small, then therefore different Lamb waves, can may such as can there is a situation where crosstalk according to the situation in each region to be monitored
Situations such as size for arranging PZT (piezoelectric transducer) 24, is specifically set.
The top of sleeper beam 1 is connect with air spring seat, applies downward pressure to it when the sleeper beam 1 bears air spring seat
When, the upper surface of sleeper beam 1 will bend, and the stress of web 11 and side weld on 12 weld of through tube will be greater than downside at this time
The stress of weld seam.Therefore, PZT (piezoelectric transducer) 24 is set on along the upside of weld seam, left side set on the monitoring unit in the first region to be monitored
It is set on web 11 with right side, that is to say, that the first region to be monitored in the present embodiment is 1 web 11 of sleeper beam and through tube 12
Between weld seam middle and upper part, wherein, " upside " refers to the EMU sleeper beam 1 in installation process towards the one of the top of car body
Side, to ensure the monitoring of the weld seam larger to stress concentration.It certainly, in the present embodiment, can also be by the first region to be monitored
The whole weld seams being set as between web 11 and through tube 12, i.e., circumferential cloth of the PZT (piezoelectric transducer) 24 along weld seam in monitoring unit
It puts.The scheme that PZT (piezoelectric transducer) 24 is set along the upside, left side and right side of weld seam is relative to the circumferentially disposed side along weld seam
For case, the quantity of PZT (piezoelectric transducer) 24 in the case where ensureing detection requirement, can be reduced, reduces cost.
In the present embodiment, the monitoring unit set on the first region to be monitored includes the first monitoring unit 211 and the second monitoring
Unit 212, the first monitoring unit 211 is set on web 11 towards the side of draw beam 15, as shown in Fig. 2, the position according to weld seam
And concrete structure herein is arranged；Second monitoring unit 212 is set on web 11 towards the side of pillow interior beam 16, is equally
Concrete structure according to the position of weld seam and herein is arranged, as shown in Figure 3.Also, the quantity of the first monitoring unit 211 is
Two, about the in the front-back direction axially symmetric of center pin mount 14, the quantity of the second monitoring unit 212 is two, about
Center pin mount 14 it is in the front-back direction axially and symmetrically, wherein, " front-rear direction " refers to the front-rear direction of car body.
It is overlap welding between lower cover 13 and center pin mount 14, in the present embodiment, two circles is circumferentially with along weld seam
PZT (piezoelectric transducer) 24, the circle close to weld seam is inner ring (as shown in the I in Fig. 4 and Fig. 5), and the circle far from weld seam is outer ring
(as shown in the O in Fig. 4 and Fig. 5), the PZT (piezoelectric transducer) 24 set on outer ring send out Lamb wave, Lamb wave warp as actuator
Welding region reflects, and the PZT (piezoelectric transducer) 24 set on inner ring receives Lamb wave, controller is received by analysis as sensor
The variation of the signal arrived and corresponding background signal, assesses whether second region to be monitored occurs damaging and damaging journey
Degree.
Due at second region to be monitored structure limitation, weld seam towards draw beam 15 and pillow interior beam 16 at be not easy to
Therefore the setting of PZT (piezoelectric transducer) 24, will be also classified into two parts, third monitoring is single set on the monitoring unit in the second region to be monitored
221 and the 4th monitoring unit 222 of member.As shown in Figure 1, the left and right sides of lower cover 13 is equipped with third monitoring unit 221, lower cover
13 are equipped with the 4th monitoring unit 222 towards the side of draw beam 15.Specifically, third monitoring unit 221 as shown in figure 4, this
The part A of three monitoring unit 221 is set on lower cover 13, and part B is set on pillow interior beam 16, and the 4th monitoring unit 222 is set
In on draw beam 15.
As shape between the PZT (piezoelectric transducer) 24 and the PZT (piezoelectric transducer) 24 as actuator corresponding thereto of sensor
Into monitoring path, wherein, an actuator can correspond to a sensor, can also correspond to multiple sensors, therefore this implementation
In example, the quantity of the piezoelectric transducer set on inner ring is less than set on the quantity of the piezoelectric transducer of outer ring, that is to say, that a work
Dynamic device (PZT (piezoelectric transducer) 24 for being set on outer ring) can be corresponding with two or three sensors (PZT (piezoelectric transducer) 24 for being set on inner ring),
By taking the 4th monitoring unit 222 as an example, as shown in figure 5, actuator a respective sensor a1, a2 and a3, actuator b respective sensors
B1 and b2, actuator c respective sensors c1 and c2.Certainly, in the present embodiment, the quantity of the sensor corresponding to each actuator
It may be set to be identical, do not do specific requirement herein, as long as can guarantee that monitoring path being capable of envelope region to be monitored.Together
When, the quantity of the PZT (piezoelectric transducer) 24 of outer ring is reduced, PZT (piezoelectric transducer) 24 can be reduced in the case where ensureing detection requirement
Quantity reduces cost.
Monitoring unit set on third region to be monitored for the 5th monitoring unit 23, based on the first monitoring unit 211 and
The method for arranging of the identical PZT (piezoelectric transducer) 24 of second monitoring unit 212, the specific deployment scenarios of the 5th monitoring unit 23 are such as
Shown in Fig. 6, and the monitoring unit deployment scenarios in the 4th region to be monitored and 23 phase of the 5th monitoring unit in third region to be monitored
Together.
The monitoring unit of above-described embodiment further includes vibration acceleration sensor, for monitoring shaking for the region to be monitored
Emotionally condition to carry out vibration acceleration compensation to monitoring result, avoids to think larger become since region to be monitored is vibrated
Situations such as shape, influences the propagation of Lamb wave, and then ensures the accuracy of monitoring result.Three acceleration transducers are also embedded in
In Kapton 25.
In addition, monitoring of structures further includes humidity sensor, for monitoring humidity condition, changed since humidity may influence piezoelectricity
Therefore the electric conductivity of energy device 24, humidity compensation is carried out to monitoring result, to weaken influence of the humidity to monitoring result, improved
Monitoring result is accuracy.Meanwhile humidity, it is also possible to influencing bonding situation of the Kapton 25 with sleeper beam 1, setting is wet
Degree sensor is conducive to the bonding situation of both monitorings.
Since the Vibration Condition in each region to be monitored of sleeper beam 1 may be different, each monitoring unit shakes including one
Dynamic acceleration transducer, and then difference is little for the humidity in each region to be monitored, therefore, which can be provided only with a humidity
Sensor.In addition, in the present embodiment, the specific installation position of vibration acceleration sensor and humidity sensor is not wanted
It asks.
It the above is only the preferred embodiment of the utility model, it is noted that for the ordinary skill people of the art
For member, under the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of monitoring of structures of the damage monitoring device of Motor train unit body sleeper beam, which is characterized in that including being set on sleeper beam (1)
The monitoring unit of region surface to be monitored；The monitoring unit includes：
Temperature sensor, for monitoring the temperature in the region to be monitored, to carry out temperature-compensating to monitoring result；
Multiple PZT (piezoelectric transducer)s (24), for exciting the region surface to be monitored to generate signal or acquisition signal, for adopting
Collect the PZT (piezoelectric transducer) (24) of signal and corresponding be used to that the region surface to be monitored to be excited to generate signal
Monitoring path, and region to be monitored described in each monitoring path envelope are formed between the PZT (piezoelectric transducer) (24).
2. monitoring of structures according to claim 1, which is characterized in that each monitoring unit includes Kapton
(25), the PZT (piezoelectric transducer) (24) and the temperature sensor are embedded in the Kapton (25).
3. monitoring of structures according to claim 2, which is characterized in that the Kapton (25) with it is described to be monitored
Region is adhesively fixed.
4. according to claim 1-3 any one of them monitoring of structures, which is characterized in that the region to be monitored includes：
First region to be monitored, the welding region between the web (11) of the sleeper beam (1) and through tube (12)；
Second region to be monitored, the welding section between the lower cover (13) of the sleeper beam (1) and center pin mount (14)
Domain；
Third region to be monitored：Welding region between the web (11) and draw beam (15)；
4th region to be monitored：Welding region between the web (11) and pillow interior beam (16).
5. monitoring of structures according to claim 4, which is characterized in that the monitoring set on the described first region to be monitored
In unit, the PZT (piezoelectric transducer) (24) is set on the web (11) along the upside, left side and right side of weld seam.
6. monitoring of structures according to claim 4, which is characterized in that the monitoring set on the described second region to be monitored
In unit, the PZT (piezoelectric transducer) (24) is circumferentially with two circles along weld seam, is disposed far from the outer of the center pin mount (14)
The PZT (piezoelectric transducer) (24) of circle, to generate signal, is provided close to the center pin mount for the second region to be monitored of excitation
(14) PZT (piezoelectric transducer) (24) of inner ring is for acquiring signal.
7. monitoring of structures according to claim 6, which is characterized in that set on the number of the PZT (piezoelectric transducer) (24) of the outer ring
Amount is less than the quantity of the PZT (piezoelectric transducer) (24) set on the inner ring.
8. according to claim 1-3 any one of them monitoring of structures, which is characterized in that the monitoring unit further includes three-dimensional and adds
Velocity sensor, for monitoring the vibration acceleration in the region to be monitored, to carry out vibration acceleration compensation to monitoring result.
9. according to claim 1-3 any one of them monitoring of structures, which is characterized in that humidity sensor is further included, for supervising
Measuring moisture situation, to carry out humidity compensation to monitoring result.
10. a kind of damage monitoring device of Motor train unit body sleeper beam, which is characterized in that including such as any one of claim 1-9 institutes
The monitoring of structures and controller stated；
There is background signal benchmark database corresponding with temperature the inside of the controller, passes through conducting wire and the temperature respectively
Sensor and each PZT (piezoelectric transducer) (24) connection are spent, for controlling each PZT (piezoelectric transducer) (24) excitation described to be monitored
Region passes through the Current Temperatures pair that base-line method is monitored with reference to the temperature sensor to generate signal or acquisition current demand signal
The background signal answered analyzes the degree of impairment in the region to be monitored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201721441492.3U CN207488235U (en) | 2017-10-27 | 2017-10-27 | The damage monitoring device and its monitoring of structures of a kind of Motor train unit body sleeper beam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721441492.3U CN207488235U (en) | 2017-10-27 | 2017-10-27 | The damage monitoring device and its monitoring of structures of a kind of Motor train unit body sleeper beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122186A (en) * | 2020-01-10 | 2020-05-08 | 西南交通大学 | System and method for monitoring vibration fatigue of rail vehicle body |
-
2017
- 2017-10-27 CN CN201721441492.3U patent/CN207488235U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122186A (en) * | 2020-01-10 | 2020-05-08 | 西南交通大学 | System and method for monitoring vibration fatigue of rail vehicle body |
| CN111122186B (en) * | 2020-01-10 | 2024-06-07 | 西南交通大学 | Rail vehicle body vibration fatigue monitoring system and method |
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