CN209559374U - A kind of wireless piezoelectric sensor for Piezoelectric Impedance method monitoring structural health conditions - Google Patents
A kind of wireless piezoelectric sensor for Piezoelectric Impedance method monitoring structural health conditions Download PDFInfo
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- CN209559374U CN209559374U CN201920269108.9U CN201920269108U CN209559374U CN 209559374 U CN209559374 U CN 209559374U CN 201920269108 U CN201920269108 U CN 201920269108U CN 209559374 U CN209559374 U CN 209559374U
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Abstract
The utility model relates to a kind of wireless piezoelectric sensor for Piezoelectric Impedance method monitoring structural health conditions, circuit board and PZT sensor are provided on packaging system；Impedance bioelectrical measurement drive module is integrated to be connect on circuit boards and with PZT sensor, for driving PZT sensor to be monitored；First communication module is integrated to be connect on circuit boards and with impedance bioelectrical measurement drive module, is used for transmission data and instruction；And first transmit data and instruction using the mode for being wirelessly connected communication between communication module and the second communication module；Second communication module has USB interface, for connecting computer.The frequency range of the impedance bioelectrical measurement of the utility model is 1-100kHz, frequency resolution 0.1Hz, and signal transmission distance can achieve 800 meters.The application of the utility model will greatly improve Piezoelectric Impedance Technology and monitor the convenience in applying at the scene, reduce the application difficulty and site workload of this technology.
Description
Technical field
The utility model belongs to Piezoelectric Impedance method structural health monitoring technology field, and in particular to one kind is used for Piezoelectric Impedance
The wireless piezoelectric sensor of method monitoring structural health conditions.
Background technique
Piezoelectric Impedance method structural health monitoring technology is a kind of monitoring structural health conditions side that the new development of twentieth century end is got up
Method.Compared with traditional global damage detection technology based on model analysis, the working frequency of Piezoelectric Impedance Technology is higher, generally
It is small thus very sensitive to the initial microlesion of structure in the fluctuation signal wavelength of inside configuration excitation in 30kHz or more,
With very high detection sensitivity.This method independent of model analysis, for large and complex structure, without Accurate Model
In the case of the qualitative detection of damage can be realized, it is difficult to avoid oscillometry bring.Used lead zirconate titanate piezoelectric pottery
Porcelain (piezoelectric ceramic, PZT) sensor have high sensitivity, reaction speed is fast, long-time stability are good, linear
The advantages that range is big can use simultaneously as driver and sensor, be extremely suitable for the on-line monitoring of large and complex structure.
PZT sensor mass is light simultaneously, and the influence to main structure working performance is smaller, can be pasted on existing structure surface or bury
Enter and carries out health monitoring inside newly-built structure.Currently, Piezoelectric Impedance Technology be successfully applied to aerospace, precision machinery,
The multiple fields such as civil construction have broad application prospects in structure fatigue damage study on monitoring.
Currently, the PZT sensor for being applied to Piezoelectric Impedance method monitoring structural health conditions scene is to adopt to be wired to mostly
Impedance measuring equipment for large scale structure and is needed to form the occasion that sensor network is monitored using multiple sensors, be needed
A large amount of conducting wire is used, the length of solid conductor is likely to be breached tens meters, between conducting wire and monitoring object main structure inevitably
It will appear interference, be self-possessed since conducting wire exists, the solder joint when being monitored for a long time between conducting wire and PZT sensor is easy
Existing desoldering needs to arrive sensor placement location again and carries out conducting wire welding.Equipment for carrying out impedance measurement is commercial impedance
Analyzer, the equipment price is expensive, and equipment is heavy, is not easy to the long-time service of monitoring field.
Utility model content
In view of the shortcomings of the prior art, the utility model provides a kind of for the wireless of Piezoelectric Impedance method monitoring structural health conditions
Piezoelectric transducer completes the impedance bioelectrical measurement of PZT sensor using impedance measurement chip, is tied measurement using wireless transmission chip
Fruit is sent to teledata and receives system, and data analysis is finally completed on the computer of monitor terminal.The utility model solves
Piezoelectric Impedance monitoring technology lacks the problem of wireless sensor and the anti-measurement scheme of field resistance, is the technology in large scale structure
Application in terms of long term monitoring provides technological means.
To solve the above problems, the technical solution adopted in the utility model are as follows:
A kind of wireless piezoelectric sensor for Piezoelectric Impedance method monitoring structural health conditions, comprising:
Packaging system is provided with circuit board and PZT sensor on the packaging system；
Impedance bioelectrical measurement drive module, the impedance bioelectrical measurement drive module be integrated on the circuit board and with it is described
PZT sensor connection, for driving the PZT sensor to be monitored；
First communication module, first communication module are integrated on the circuit board and drive with the impedance bioelectrical measurement
Module connection, is used for transmission data and instruction；And
Second communication module uses the side for being wirelessly connected communication between first communication module and second communication module
Formula transmits data and instruction；Second communication module has USB interface, for connecting computer.
Optionally, the packaging system further include: sensor outer housing, battery case, permanent magnet, compresses bullet at circuit board housing
Spring and support mandrel, wherein
The bottom of the sensor outer housing, which is inlayed, is provided with the PZT sensor, the top of the sensor outer housing and institute
It states circuit board housing to be fixedly connected, the circuit board housing is for being arranged the circuit board；
The sensor outer housing is internally provided with the permanent magnet, for enhancing the sensor outer housing and monitored object
The binding force of body；The permanent magnet is hollow structure and forms the space for accommodating object；
The support mandrel is set in the space, has been arranged radially protrusion, the compression bullet along the support mandrel
Spring is set to the protrusion and above and with the PZT sensor abuts, for enhancing the knot of the PZT sensor and monitored object
With joint efforts；
Resistance measurement drive module is connect with the PZT sensor using conducting wire, and two conducting wires pass through the space
It is connect with the PZT sensor.
Optionally, further includes: power module, the power module include: two power management chips, diode, inductance,
Multiple resistance and multiple capacitors.
Optionally, the impedance bioelectrical measurement drive module includes: impedance bioelectrical measurement chip, operation amplifier chip, crystal oscillator, electricity
Sense, multiple resistance and multiple capacitors.
Optionally, first communication module include: transponder chip, it is power amplifier chip, antenna, multiple crystal oscillators, more
A inductance, multiple resistance and multiple capacitors.
Optionally, second communication module includes: that transponder chip, power amplifier chip, USB turn serial port chip, more
A crystal oscillator, antenna, USB joint, multiple inductance, multiple resistance and multiple capacitors.
The utility model has the beneficial effects that:
After sensor is encapsulated into position to be monitored, do not need to pass through conducting wire between PZT sensor and impedance bioelectrical measurement equipment
Connection, may be implemented the wireless transmission of electrical impedance signal measurement, while circuit board has been internally integrated impedance bioelectrical measurement chip, can be with
It realizes impedance bioelectrical measurement function simultaneously, does not need using commercial impedance analyzer.The frequency of the impedance bioelectrical measurement of the utility model
Range is 1-100kHz, frequency resolution 0.1Hz, and signal transmission distance can achieve 800 meters.The application of the utility model will be big
The big Piezoelectric Impedance Technology that improves monitors the convenience in applying at the scene, reduces the application difficulty and work on the spot of this technology
Amount.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the impedance bioelectrical measurement drive module circuit diagram of the utility model.
Fig. 3 is the first communication module circuit diagram A of the utility model.
Fig. 4 is the first communication module circuit diagram B of the utility model.
Fig. 5 is the power module circuitry schematic diagram A of the utility model.
Fig. 6 is the power module circuitry schematic diagram B of the utility model.
Fig. 7 is the second communication module circuit diagram A of the utility model.
Fig. 8 is the second communication module circuit diagram B of the utility model.
Fig. 9 is the second communication module circuit diagram C of the utility model.
Wherein, 1, PZT sensor, 2, sensor outer housing, 3, circuit board housing, 4, battery case, 5, permanent magnet, 6, compression bullet
Spring, 7, support mandrel, 8, conducting wire.
Specific embodiment
In order to enable those skilled in the art to better understand the technical solutions of the present invention, combined with specific embodiments below
The utility model is described in further detail.It note that the embodiments described below is exemplary, be only used for explaining this
Utility model, and should not be understood as limiting the present invention.Particular technique or condition are not specified in embodiment, according to this
Technology or conditions described in document in field are carried out according to product description.Production is not specified in agents useful for same or instrument
Manufacturer person, being can be with conventional products that are commercially available.
One aspect according to the present utility model, the utility model provide a kind of for Piezoelectric Impedance method structural health prison
The wireless piezoelectric sensor of survey, comprising: packaging system is provided with circuit board and PZT sensor on the packaging system；Resistance
Anti- measurement drive module, the impedance bioelectrical measurement drive module are integrated on the circuit board and connect with the PZT sensor,
For driving the PZT sensor to be monitored；First communication module, first communication module are integrated on the circuit board
And connect with the impedance bioelectrical measurement drive module, it is used for transmission data and instruction；And second communication module, described first is logical
Data and instruction is transmitted using the mode for being wirelessly connected communication between news module and second communication module；The second communication mould
Block has USB interface, for connecting computer.
Specific embodiment according to the present utility model, Fig. 1 are the overall structure diagram of the utility model, as shown,
The packaging system further include: sensor outer housing, circuit board housing, battery case, permanent magnet, holddown spring and support mandrel,
In, the bottom of the sensor outer housing, which is inlayed, is provided with the PZT sensor, the top of the sensor outer housing and the circuit
Plate shell is fixedly connected, and the circuit board housing is for being arranged the circuit board；The sensor outer housing is internally provided with institute
Permanent magnet is stated, for enhancing the binding force of the sensor outer housing Yu monitored object；The permanent magnet is hollow structure and shape
At the space for accommodating object；The support mandrel is set in the space, has been arranged radially protrusion along the support mandrel, institute
It states holddown spring to be set to described raised upper and abut with the PZT sensor, for enhancing the PZT sensor and being monitored
The binding force of object；Resistance measurement drive module is connect with the PZT sensor using conducting wire, and two conducting wires pass through described
Space is connect with the PZT sensor.
In use, PZT sensor is pasted in monitored metal structure by seccotine, outside sensor outer housing, circuit board
Shell and support mandrel are all made of polytetrafluoroethylene material manufacture, and sensor outer housing bottom surface pastes monitored gold using seccotine
Belong in structure, circuit board housing bottom surface is pasted together with sensor outer housing upper surface by seccotine, in circuit board housing
Circuit board is placed in portion, and battery inside places the series connection of 2 section 1.5V batteries and is used as system power supply, and permanent magnet selects NdFeB material system
At sensor outer housing is adsorbed onto detected steel component surface by magnetic force, further enhances sensor outer housing and monitored
Binding force between structure, the effect of holddown spring are the binding forces further enhanced between PZT sensor and monitored structure,
Quantity can be set according to the size selection of PZT sensor, support mandrel is for being fixed and clamped spring position, and the one of 2 conducting wires
End is separately connected the anode and cathode of PZT sensor, the other end respectively with the port ROUT of impedance bioelectrical measurement modular circuit and RIN
Port connection.
Specific embodiment according to the present utility model, the utility model further include: power module, Fig. 5 are the utility model
Power module circuitry schematic diagram A.Fig. 6 is the power module circuitry schematic diagram B of the utility model.As shown, the power supply
Module includes: two power management chips, diode, inductance, multiple resistance and multiple capacitors.Specifically, the power supply mould
Block is by power management chip U8 and U9, diode D1, inductance L18, resistance R25-R26, capacitor C59-C66 composition, wherein U8
The model 1N5817 of the model LM117, D1 of model MAX858, U9.Resistance R25 passes through electricity in port VIN and battery case
Pond anode is connected, and battery cathode is connected with GND current potential.
Specific embodiment according to the present utility model, Fig. 2 are that the impedance bioelectrical measurement drive module circuit of the utility model shows
It is intended to.As shown, the impedance bioelectrical measurement drive module includes: impedance bioelectrical measurement chip, operation amplifier chip, crystal oscillator, electricity
Sense, multiple resistance and multiple capacitors.Specifically, the impedance bioelectrical measurement module is by impedance bioelectrical measurement chip U1, operation amplifier
Chip U2, crystal oscillator Y1, inductance L1, resistance R1-R7, capacitor C1-C6 are formed, wherein the model of the model AD5933, U2 of U1
AD820.The connection type of the element is as shown in Figure 2.
Specific embodiment according to the present utility model, first communication module include: transponder chip, power amplification core
Piece, antenna, multiple crystal oscillators, multiple inductance, multiple resistance and multiple capacitors.Fig. 3 is the first communication module electricity of the utility model
Road schematic diagram A.Fig. 4 is the first communication module circuit diagram B of the utility model.As shown, the first communication module is by receiving
Send out device chip U3, power amplifier chip U4, crystal oscillator Y2, Y3, antenna E1, inductance L2-L9, resistance R8-R12, capacitor C7-C31 group
At the wherein model CC2591 of the model CC2530, U4 of U3.The pin 5 and 6 of chip U3 respectively by port SDA and
SCL is connected with the pin 15 and 16 of impedance bioelectrical measurement module U1 chip, and the pin 7 and 8 of chip U3 passes through port P1.3 respectively
It is connected with P1.2 with the pin 1 and 4 of power module U8 chip.
Specific embodiment according to the present utility model, second communication module include: transponder chip, power amplification core
Piece, USB turn serial port chip, multiple crystal oscillators, antenna, USB joint, multiple inductance, multiple resistance and multiple capacitors.Fig. 7 is this reality
With the second novel communication module circuit diagram A.Fig. 8 is the second communication module circuit diagram B of the utility model.Fig. 9
For the second communication module circuit diagram C of the utility model.As shown, the second communication module is by transponder chip U5, function
Rate amplification chip U6, USB turn serial port chip U7, crystal oscillator Y4-Y6, antenna E2, USB joint J1, inductance L10-L17, resistance R13-
R24, capacitor C32-C58 are formed, wherein the model CP2102 of the model CC2591, U7 of the model CC2530, U6 of U5.
The pin 16 and 17 of chip U5 and the pin 5 and 1 of chip U7 are separately connected, and data reception module passes through connector J1 and computer
USB interface connection.
Another aspect according to the present utility model, the utility model provide a kind of monitoring side of wireless piezoelectric sensor
Method, comprising the following steps:
PZT sensor is pasted into position to be monitored using seccotine, is connected circuit board and PZT sensor using conducting wire
It connects, is bonded to position to be detected after seccotine is smeared in the bottom of sensor outer housing, while support holddown spring with PZT sensor
It connects；
Power on, start operating circuit, impedance bioelectrical measurement drive module driving PZT sensor is monitored, and will inspection
It surveys the data obtained and the second communication module is sent to by the first communication module；
Data are sent to computer through serial ports and are shown and stored by the second communication module.
Specific embodiment according to the present utility model, first communication module and second communication module are two-way
News, when needing to carry out electrical impedance signal measurement, second communication module sends to first communication module and instructs, and carries out
Monitoring.
Embodiment 1
PZT sensor is pasted near sites to be monitored using seccotine, by the lower end of 2 conducting wires and PZT sensor
Positive and negative anodes be respectively welded together；
PZT sensor is packaged according to shown in Fig. 1,2 section 1.5V dry cells are installed in battery case, circuit board is pacified
It is attached in circuit board housing, by the upper end of conducting wire together with welding circuit board, by circuit board housing and is passed with seccotine later
Sensor shell is bonded together, and permanent magnet and holddown spring are fixed to inside sensor outer housing, by conducting wire later in sensor
Seccotine is smeared in shell lower surface, and entire encapsulating structure is fixed to PZT sensor external using the magnetic force of permanent magnet.
Start operating circuit, impedance bioelectrical measurement drive module starts to carry out electrical impedance signal measurement, and measurement result is sent out
Data transmission blocks are sent to, the first communication module carries out data transmission.Data reception module passes through connector J1 and serial ports of computers
Connection, after data reception module receives the data of sending module, is sent to computer by USB serial ports, by computers
The LabVIEW host computer of installation is displayed data and is stored.
After the sensor of the utility model is encapsulated into position to be monitored in summary, PZT sensor and impedance bioelectrical measurement are set
It does not need to connect by conducting wire between standby, the wireless transmission of electrical impedance signal measurement may be implemented, while circuit board is internally integrated
Impedance bioelectrical measurement chip, can be realized simultaneously impedance bioelectrical measurement function, does not need using commercial impedance analyzer.Set sensing
The frequency range of the anti-measurement of device package resistance is 1-100kHz, frequency resolution 0.1Hz, and signal transmission distance can achieve
800 meters.The application of the utility model will greatly improve Piezoelectric Impedance Technology and monitor the convenience in applying at the scene, reduce this
The application difficulty and site workload of technology.
In the description of the present invention, it should be understood that term " first ", " second " are used for description purposes only, and
It cannot be understood as indicating or implying relative importance or implicitly indicate the quantity of indicated technical characteristic.It defines as a result,
The feature of " first ", " second " can explicitly or implicitly include one or more of the features.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Identical embodiment or example need not be directed to by stating.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.In addition, without conflicting with each other, this field
Technical staff can carry out the feature of different embodiments or examples described in this specification and different embodiments or examples
Combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
It inside can make changes, modifications, alterations, and variations to the above described embodiments, at the same time, for those skilled in the art, foundation
The thought of the application, there will be changes in the specific implementation manner and application range.
Claims (6)
1. a kind of wireless piezoelectric sensor for Piezoelectric Impedance method monitoring structural health conditions characterized by comprising
Packaging system is provided with circuit board and PZT sensor on the packaging system；
Impedance bioelectrical measurement drive module, the impedance bioelectrical measurement drive module are integrated on the circuit board and pass with the PZT
Sensor connection, for driving the PZT sensor to be monitored；
First communication module, first communication module be integrated on the circuit board and with the impedance bioelectrical measurement drive module
Connection, is used for transmission data and instruction；And
Second communication module is passed between first communication module and second communication module using the mode for being wirelessly connected communication
Transmission of data and instruction；Second communication module has USB interface, for connecting computer.
2. wireless piezoelectric sensor according to claim 1, which is characterized in that the packaging system further include: sensor
Shell, circuit board housing, battery case, permanent magnet, holddown spring and support mandrel, wherein
The bottom of the sensor outer housing, which is inlayed, is provided with the PZT sensor, the top of the sensor outer housing and the electricity
Road plate shell is fixedly connected, and the circuit board housing is for being arranged the circuit board；
The sensor outer housing is internally provided with the permanent magnet, for enhancing the sensor outer housing and monitored object
Binding force；The permanent magnet is hollow structure and forms the space for accommodating object；
The support mandrel is set in the space, has been arranged radially protrusion along the support mandrel, the holddown spring is set
It is placed in the protrusion above and with the PZT sensor to abut, for enhancing the combination of the PZT sensor and monitored object
Power；
Resistance measurement drive module is connect with the PZT sensor using conducting wire, and two conducting wires pass through the space and institute
State the connection of PZT sensor.
3. wireless piezoelectric sensor according to claim 1, which is characterized in that further include: power module, the power supply mould
Block includes: two power management chips, diode, inductance, multiple resistance and multiple capacitors.
4. wireless piezoelectric sensor according to claim 1, which is characterized in that the impedance bioelectrical measurement drive module packet
It includes: impedance bioelectrical measurement chip, operation amplifier chip, crystal oscillator, inductance, multiple resistance and multiple capacitors.
5. wireless piezoelectric sensor according to claim 1, which is characterized in that first communication module includes: transmitting-receiving
Device chip, power amplifier chip, antenna, multiple crystal oscillators, multiple inductance, multiple resistance and multiple capacitors.
6. wireless piezoelectric sensor according to claim 1, which is characterized in that second communication module includes: transmitting-receiving
Device chip, power amplifier chip, USB turn serial port chip, multiple crystal oscillators, antenna, USB connector, multiple inductance, multiple resistance and
Multiple capacitors.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920269108.9U CN209559374U (en) | 2019-03-04 | 2019-03-04 | A kind of wireless piezoelectric sensor for Piezoelectric Impedance method monitoring structural health conditions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920269108.9U CN209559374U (en) | 2019-03-04 | 2019-03-04 | A kind of wireless piezoelectric sensor for Piezoelectric Impedance method monitoring structural health conditions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764982A (en) * | 2019-03-04 | 2019-05-17 | 广东省特种设备检测研究院珠海检测院 | A kind of wireless piezoelectric sensor for Piezoelectric Impedance method monitoring structural health conditions |
-
2019
- 2019-03-04 CN CN201920269108.9U patent/CN209559374U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764982A (en) * | 2019-03-04 | 2019-05-17 | 广东省特种设备检测研究院珠海检测院 | A kind of wireless piezoelectric sensor for Piezoelectric Impedance method monitoring structural health conditions |
| CN109764982B (en) * | 2019-03-04 | 2024-04-26 | 广东省特种设备检测研究院珠海检测院 | Wireless piezoelectric sensor for structural health monitoring by piezoelectric impedance method |
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