CN215339664U - A piezoelectricity intelligent device for pipeline structure health monitoring - Google Patents
A piezoelectricity intelligent device for pipeline structure health monitoring Download PDFInfo
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- CN215339664U CN215339664U CN202121803276.5U CN202121803276U CN215339664U CN 215339664 U CN215339664 U CN 215339664U CN 202121803276 U CN202121803276 U CN 202121803276U CN 215339664 U CN215339664 U CN 215339664U
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- pipeline
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Abstract
The utility model discloses a piezoelectric intelligent device for monitoring the health of a pipeline structure, wherein a PZT sheet is arranged in a shell, and a silica gel waterproof layer is coated on the PZT sheet; the PZT sheet is connected with one end of a shielding lead in a welding way, the other end of the shielding lead is connected with a shielding joint, and the shielding joint is connected with a signal transmitting and collecting system; the PZT sheet connected with the shell is wrapped by the outer cladding; putting the piezoelectric ceramic wafer PZT module into a curing chamber for curing, and removing the shell after the piezoelectric ceramic wafer PZT module reaches a preset strength; the piezoelectric ceramic wafer PZT module is arranged along the circumference of one end of the pipeline to form an excitation array; the piezoelectric ceramic wafer PZT module is arranged along the circumference of the other end of the pipeline to form a receiving array; when the piezoelectric ceramic wafer PZT module is connected with a pipeline, a shielding lead of the piezoelectric ceramic wafer PZT module is arranged in the shell, and a shielding joint is arranged outside the shell; the PZT device has small volume, light weight and certain strength, and the bonding of the PZT device on the wall of the concrete pipe does not influence the integral stress performance of the structure and can play the same role as common aggregate.
Description
Technical Field
The utility model belongs to the technical field of structural damage detection, and particularly relates to a piezoelectric intelligent device for monitoring the health of a pipeline structure.
Background
Concrete pipelines have been widely applied to engineering practice due to good mechanical properties, and then the pipelines often work with cracks due to the fact that the pipelines are possibly too long in service period or poor in pipeline maintenance and the like, and the mechanical properties of the reinforced concrete pipelines are affected to different degrees due to the damage form of the pipelines with cracks, so that the cracks are expanded, liquid leakage accidents in the pipelines are caused, and therefore, the damage detection of the concrete pipelines becomes very important. Pzt (piezoelectric transducer) has a stable piezoelectric effect and is often used as a sensor and an actuator in structural health monitoring in the civil engineering field. The PZT is made into a piezoelectric intelligent Aggregate (Smart Aggregate) which is used for concrete crack damage monitoring, concrete age strength monitoring, section peeling monitoring of a steel and concrete combined structure and the like, so that a good damage identification effect is obtained. In addition, the PZT can excite Rayleigh waves and longitudinal waves to monitor the damage of concrete surface cracks and internal cracks.
The arrangement of PZT sheets for detecting structural damage is generally one actuator and one receiver, i.e., one transmitter and one receiver. The obtained result is often greatly fluctuated and the signal is weak under the influence of the anisotropy of the material of the surface of the pipeline. These problems have caused a need for improvements in the way that damage to conduits is detected by PZT to address the current dilemma of poor detection.
SUMMERY OF THE UTILITY MODEL
The technical scheme adopted by the utility model is as follows:
a piezoelectric intelligent device for monitoring the health of a pipeline structure comprises a pipeline, a PZT sheet, a silica gel waterproof layer, a shielding lead, a shielding joint, a shell and an outer cladding layer;
the PZT sheet is arranged in the shell, and a silica gel waterproof layer is coated on the PZT sheet;
the PZT sheet is connected with one end of a shielding lead in a welding way, the other end of the shielding lead is connected with a shielding joint, and the shielding joint is connected with a signal transmitting and collecting system;
the PZT sheet connected with the shell is wrapped by an outer cladding; putting the piezoelectric ceramic wafer PZT module into a curing chamber for curing, and removing the shell after the piezoelectric ceramic wafer PZT module reaches a preset strength;
sixteen piezoelectric ceramic wafer PZT modules are arranged along the circumference of one end of the pipeline and are bonded on the wall of the pipeline to form an excitation array;
the four piezoelectric ceramic wafer PZT modules are arranged along the circumference of the other end of the pipeline and are bonded on the wall of the pipeline to form a receiving array;
when the piezoelectric ceramic wafer PZT module is connected with a pipeline, a shielding lead of the piezoelectric ceramic wafer PZT module is arranged in the shell, and a shielding joint is arranged outside the shell;
and a damage crack of the pipeline is arranged between the excitation array and the receiving array.
The piezoelectric intelligent device for monitoring the health of the pipeline structure has the preferable scheme that the outer cladding layer is fine sand concrete or mortar.
According to the piezoelectric intelligent device for monitoring the health of the pipeline structure, the piezoelectric ceramic wafer PZT modules of the excitation array can be added according to the requirement, and the number of the piezoelectric ceramic wafer PZT modules is even.
The piezoelectric intelligent device for monitoring the health of the pipeline structure has the preferred scheme that the pipeline type is a reinforced concrete pipeline.
The optimal scheme of the piezoelectric intelligent device for monitoring the health of the pipeline structure is that the piezoelectric ceramic wafer PZT module is maintained for 28 days to reach the preset strength.
The excitation matrix formed by the piezoelectric ceramic wafer PZT module and the receiving matrix formed by the PZT module cannot be separated too far, and the strength of the received signal is decreased with the distance.
Through a method for pipeline structure healthMethod for detecting structural damage by using monitored piezoelectric intelligent device, and piezoelectric intelligent aggregate composition 4×And 4, the excitation matrix forms a sensing signal, the sensing signal is transmitted from the end of the excitation matrix, is damaged by a path structure, and is finally received by the end of the receiving matrix.
The utility model has the following beneficial effects and advantages:
the fine sand concrete block in the piezoelectric ceramic wafer PZT module in the structure can play a role in protecting the PZT sheet, so that the PZT sheet is prevented from being damaged in the structure construction process; meanwhile, the influence of the change of the external environment such as temperature and humidity on the detection can be effectively reduced. The PZT sheet can be used as a sensor and an actuator, other structure driving devices are not needed to be used in the structural health monitoring, the energy consumption is low, and the fund can be saved. And the shielding lead is connected with the PZT sheet, so that the PZT sheet is helpful to resist noise interference. By changing the PZT arrangement form, the strength of the received signal is enhanced, the received signal is stabilized, and the received signal is filtered. Meanwhile, the PZT device is small in size, light in weight and certain in strength, the integral stress performance of the structure cannot be influenced when the PZT device is bonded on the wall of the concrete pipe, and the PZT device can also play the same role as common aggregate.
Drawings
FIG. 1 is a schematic side view of the present invention;
FIG. 2 is a schematic diagram of a piezoelectric ceramic wafer PZT module;
FIG. 3 is a schematic front view of the present invention;
fig. 4 is a schematic elevation structure of the present invention.
In the figure: 1. a PZT sheet; 2. a silica gel waterproof layer; 3. a shielded wire; 4. a shield joint; 5. a housing; 6. exciting the array; 7. receiving an array; 8. damage cracks; 9. a pipeline.
Detailed Description
As shown in fig. 1-4, a piezoelectric intelligent device for monitoring the health of a pipeline structure comprises a pipeline 9, a PZT sheet 1, a silica gel waterproof layer 2, a shielding wire 3, a shielding joint 4, a shell 5 and an outer cladding;
the PZT sheet 1 is arranged in the shell 5, and a silica gel waterproof layer 2 is coated on the PZT sheet 1;
the PZT sheet 1 is welded with one end of a shielding lead 3, the other end of the shielding lead 3 is connected with a shielding joint 4, and the shielding joint 4 is connected with a signal transmitting and collecting system;
the PZT sheet 1 connected with the shell 5 is wrapped by an outer cladding; putting the piezoelectric ceramic wafer PZT module into a curing chamber for curing, and removing the shell after the piezoelectric ceramic wafer PZT module reaches a preset strength;
sixteen piezoelectric ceramic wafer PZT modules are arranged along the circumference of one end of the pipeline 9 and are bonded on the wall of the pipeline to form an excitation array;
the four piezoelectric ceramic wafer PZT modules are arranged along the circumference of the other end of the pipeline 9 and are bonded on the wall of the pipeline to form a receiving array;
when the piezoelectric ceramic wafer PZT module is connected with the pipeline 9, the shielding lead 3 is in the shell 5, and the shielding joint 4 is outside the shell 5;
between the excitation array and the receiving array is a damage crack 8 of the pipeline.
The outer cladding is fine sand concrete or mortar.
The piezoelectric ceramic wafer PZT modules of the excitation array can be added according to the requirement, and the number is even.
The type of said pipe 9 is a reinforced concrete pipe.
And the piezoelectric ceramic wafer PZT module is maintained for 28 days to reach the preset strength.
The excitation matrix formed by the piezoelectric ceramic wafer PZT module and the receiving matrix formed by the PZT module cannot be separated too far, and the strength of the received signal is decreased with the distance.
A method for detecting structural damage is formed by a piezoelectric intelligent device for monitoring the health of a pipeline structure, and the piezoelectric ceramic pieces PZT are formed into 4 parts×And 4, the excitation matrix forms a sensing signal, the sensing signal is transmitted from the end of the excitation matrix, is damaged by a path structure, and is finally received by the end of the receiving matrix.
Claims (5)
1. The utility model provides a piezoelectricity intelligent device for pipeline structure health monitoring which characterized in that: comprises a pipeline, a PZT sheet, a silica gel waterproof layer, a shielding lead, a shielding joint, a shell and an outer cladding layer;
the PZT sheet is arranged in the shell, and a silica gel waterproof layer is coated on the PZT sheet;
the PZT sheet is connected with one end of a shielding lead in a welding way, the other end of the shielding lead is connected with a shielding joint, and the shielding joint is connected with a signal transmitting and collecting system;
the PZT sheet connected with the shell is wrapped by an outer cladding; putting the piezoelectric ceramic wafer PZT module into a curing chamber for curing, and removing the shell after the piezoelectric ceramic wafer PZT module reaches a preset strength;
sixteen piezoelectric ceramic wafer PZT modules are arranged along the circumference of one end of the pipeline and are bonded on the wall of the pipeline to form an excitation array;
the four piezoelectric ceramic wafer PZT modules are arranged along the circumference of the other end of the pipeline and are bonded on the wall of the pipeline to form a receiving array;
when the piezoelectric ceramic wafer PZT module is connected with a pipeline, a shielding lead of the piezoelectric ceramic wafer PZT module is arranged in the shell, and a shielding joint is arranged outside the shell;
and a damage crack of the pipeline is arranged between the excitation array and the receiving array.
2. The piezoelectric intelligent device for monitoring the health of the pipeline structure according to claim 1, wherein: the outer cladding is fine sand concrete or mortar.
3. The piezoelectric intelligent device for monitoring the health of the pipeline structure according to claim 1, wherein: the piezoelectric ceramic wafer PZT modules of the excitation array can be added according to the requirement, and the number is even.
4. The piezoelectric intelligent device for monitoring the health of the pipeline structure according to claim 1, wherein: the type of the pipeline is a reinforced concrete pipeline.
5. The piezoelectric intelligent device for monitoring the health of the pipeline structure according to claim 1, wherein: and the piezoelectric ceramic wafer PZT module is maintained for 28 days to reach the preset strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121803276.5U CN215339664U (en) | 2021-08-04 | 2021-08-04 | A piezoelectricity intelligent device for pipeline structure health monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121803276.5U CN215339664U (en) | 2021-08-04 | 2021-08-04 | A piezoelectricity intelligent device for pipeline structure health monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215339664U true CN215339664U (en) | 2021-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121803276.5U Active CN215339664U (en) | 2021-08-04 | 2021-08-04 | A piezoelectricity intelligent device for pipeline structure health monitoring |
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| Country | Link |
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| CN (1) | CN215339664U (en) |
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2021
- 2021-08-04 CN CN202121803276.5U patent/CN215339664U/en active Active
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