CN206627538U - A kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring - Google Patents
A kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring Download PDFInfo
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- CN206627538U CN206627538U CN201720291931.0U CN201720291931U CN206627538U CN 206627538 U CN206627538 U CN 206627538U CN 201720291931 U CN201720291931 U CN 201720291931U CN 206627538 U CN206627538 U CN 206627538U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
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Abstract
The utility model discloses a kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring, including clock circuit, MCU microprocessors and MEMS circuits, the output end of the MEMS circuits is electrically connected with filter circuit, the output end of the filter circuit is electrically connected with A/D convertor circuit, the output end of the A/D convertor circuit and clock circuit is electrically connected with the input of MCU microprocessors, the signal connection end of the MCU microprocessors is connected with GPRS wireless modules, the MEMS circuits, the input of MCU microprocessors and GPRS wireless modules is electrically connected at electric power management circuit.The utility model superior performance, simple installation, the signal of vibratory impulse is can detect, monitoring in real time is more comprehensively whole, and really its volume is small, easy of integration, low in energy consumption, highly reliable, and monitoring is more comprehensively accurate, and compatibility is good, easy to assemble, low in energy consumption, and reliability is high.
Description
Technical field
The utility model belongs to structural health monitoring technology field, and in particular to a kind of for civil structure health monitoring
MEMS sensor GPRS acquisition nodes.
Background technology
At present, MEMS sensor is a kind of new micro mechanical device, be greatly facilitated being miniaturized of sensor, it is intelligent and
Network functionization develops.Its species is various, is all taken shape in physics, chemistry, biological field, there is campaign-styled, supporting type, control
Standard detects the MEMS sensor of quality.Manufacturing technology increasingly progress greatly the parameter index for making MEMS sensor and performance constantly carries
Height, merged with multi-disciplinary price differential and sensor is constantly weeded out the old and bring forth the new, application field is constantly widened.
Mems accelerometer is used for the acceleration for measuring carrier, and provides the speed and displacement information of correlation.MEMS accelerates
It is steady that the main performance index of degree meter includes measurement range, resolution ratio, stiffness factor stability, axial cross effect, noise, zero bias
It is qualitative etc..The sensor has the advantages of size is small, in light weight and simple in construction, it is easy to accomplish high-precision microsensor,
The field higher applied to stability.In addition, the change of long cable line impedance in transmission theory is by frequency signal amplitude shadow
Ring and change, the engineering laying for complex environment has certain problem, and wiring is cumbersome, complicated, when later maintenance expends a large amount of
Between, cost.
Now propose utilize high-precision MEMS sensor GPRS acquisition nodes, the equipment have long-term reliability,
Strong antijamming capability, the features such as acquisition interface is simple, so extensively using measuring in the engineerings such as bridge, side slope.Therefore, it is a kind of
Urgently proposed with reliable and stable, anti-vibration and impact, the MEMS sensor GPRS acquisition nodes of compact applications, can extensive use
In the high adverse circumstances monitoring point of the technical requirements such as bridge, tunnel, side slope.
Utility model content
In order to solve the above technical problems, the utility model proposes a kind of superior performance, simple installation to be used for building knot
The MEMS sensor GPRS acquisition nodes of structure health monitoring, the strain acquirement node can access the foil gauge of different resistances, monitoring
More comprehensively accurate, compatible good, small volume, easily arrangement are easy to assemble, and low in energy consumption, reliability is high.
To achieve the above object, the utility model provides following technical scheme：It is a kind of for civil structure health monitoring
MEMS sensor GPRS acquisition nodes, including clock circuit, MCU microprocessors and MEMS circuits, the output of the MEMS circuits
End is electrically connected with filter circuit, and the output end of the filter circuit is electrically connected with A/D convertor circuit, the A/D convertor circuit
It is electrically connected with the output end of clock circuit and the input of MCU microprocessors, and A/D convertor circuit connects with MCU microprocessors
Connect, being converted into data signal for acceleration signal supplies MCU microprocessor analysis, the signal connection end of the MCU microprocessors
Signal is connected with GPRS wireless modules, and the power input of the MEMS circuits, MCU microprocessors and GPRS wireless modules is electric
Property be connected to electric power management circuit, the signal that the signal of GPRS wireless modules (7) output inputs with external monitoring platform
Connection, and its GPRS wireless module uses the wireless GPRS network set up based on TCP/IP patterns, its carrier wave frequency range band is roomy, penetrates
Frequency signal and message transmission rate are high, can realize that transparent transmission transmits, the signal of the GPRS wireless modules output and external monitoring
The signal connection of platform input, the voltage signal of the strain acquirement node establish TCP server by GPRS wireless modules, etc.
Host computer sends control instruction, the data transfer that MEMS is collected to monitoring platform after to be connected.
Preferably, the MCU microprocessors include：MSP430F5438 micro-chip processors, clock circuit module, GPRS without
Wire module circuit, and MSP430F5438 micro-chip processors electrically connect with clock circuit module and GPRS wireless modules circuit respectively
Connect, for the acceleration signal of transmission process, MEMS using LIS344ALH chips as self-vibration element, in the axial direction quiet
State sensitivity reaches 0.66mV/g, and precision can bear ± 2g acceleration signal impact, operating sampling frequency bandwidth 1-+1%
500Hz, bias instaility are only 0.5 °/h, and per axle acceleration, response 3000g/0.5ms, disclosure satisfy that the practical field of high score rate
Close.
Preferably, the MEMS circuits using the accelerometer and LIS344ALH chips of piezo-electric effect as self-vibration element,
And the built-in modulate circuit of MEMS circuits, its MEMS is using the force-frequency effect of the beam that shakes, detection resonant frequency change, and built in MEMS
Modulate circuit, output end are directly connected with filter circuit, for filtering out the harmonic component of acceleration, obtain optimal quality
Factor and cut-off frequency.
Preferably, the electric power management circuit is TLC2154 single power supply, and the voltage output of electric power management circuit
End is provided with low pressure difference linear voltage regulator chip, and electric power management circuit voltage uses low pressure difference linear voltage regulator chip realization ± 15V
To ± 12V transformation and 12V to 4V transformation, to be powered to the circuit of different power voltage, circuit voltage is improved
Stability；Single power supply of the TLC2154 can avoid electromagnetism interference, obtain the stability of high impedance source, low noise, adopt
The high-operational amplifier powered with TLC2154 single supplies, filter circuit is formed with resistance capacitance.
Technique effect of the present utility model and advantage：The MEMS sensor GPRS for being used for civil structure health monitoring is gathered
Node, solve traditional wire martingale complexity by the wireless means of communication of GPRS, connect up cumbersome, signal long-distance transmissions
The shortcomings of error is big, later maintenance is constant, while MEMS circuits use the accelerometer of piezo-electric effect, built-in quality during motion
Block can produce pressure, strain the rigid body of support, and final acceleration becomes voltage output to filter circuit, for measure X,
Y, the voltage signal of Z 3-axis accelerations, then be connected with A/D convertor circuit, effective data signal is formed through microprocessor analysis,
Be adapted to use in long term monitoring or detection, wherein MEMS using LIS344ALH chips as self-vibration element, in the axial direction quiet
State sensitivity reaches 0.66mV/g, and precision can bear ± 2g acceleration signal impact, operating sampling frequency bandwidth 1-+1%
500Hz, bias instaility are only 0.5 °/h, and per axle acceleration, response 3000g/0.5ms, disclosure satisfy that high-resolution practical field
Close, the low pressure difference linear voltage regulator chip realization ± 15V to ± 12V of electric power management circuit output end transformation is with 12V to 4V's
Transformation, to be powered to the circuit of different power voltage, improves the stability of circuit voltage.
Brief description of the drawings
Fig. 1 is a kind of overall electricity of MEMS sensor GPRS acquisition nodes for civil structure health monitoring of the utility model
Lu Tu；
Fig. 2 is MEMS in a kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring of the utility model
Filter circuit figure；
Fig. 3 is AD in a kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring of the utility model
Change-over circuit figure；
Fig. 4 is power supply in a kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring of the utility model
Manage circuit diagram；
Fig. 5 is GPRS in a kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring of the utility model
Radio-circuit figure；
Fig. 6 is micro- place in a kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring of the utility model
Manage device and clocking scheme.
In figure：1 electric power management circuit, 2MEMS circuits, 3 filtered electricals, 4AD change-over circuits, 5MUC microprocessors, 6 clocks electricity
Road, 7GPRS radio-circuits.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
The utility model provides a kind of MEMS sensor GPRS for civil structure health monitoring as shown in Figure 1 and adopted
Collect node, including：Electric power management circuit 1, MEMS circuits 2, filter circuit 3, A/D convertor circuit 4, MUC microprocessors 5, clock electricity
Road 6, GPRS radio-circuits 7.
As shown in Fig. 2 the utility model selection LIS344ALH sensors are core MEMS circuits 2, three axle sitting postures are added
Speedometer zero bias, static drift and demarcation factor are acquired, and modulate circuit have been disposed inside it, output is directly amplified
Voltage signal.Harmonic component is removed by TLC2254 filter circuits 3 again, makes the sensitivity coefficient of output more accurate.
As shown in figure 3, A/D convertor circuit 4 does the AD conversion of 16 using ADS1248 chips, using bus-organization with
MCU microprocessors 5 are connected, and the selection of 3 tunnels is only made of MAX4051, the acceleration signal on the tunnel of simultaneous transmission 3, are X, Y, Z tri- respectively
Axle.
As shown in figure 4, electric power management circuit 1 is first designed using DC-DC Switching Power Supplies, lithium battery is boosted into ± 15V, then
Formed using linear three terminal regulator LM7805, LM7905 and MP2303, realization ± 12V to ± 5V, 12V to 4V transformation, with
Meet the needs of different circuits are to supply voltage, ensure that supply voltage is continual and steady.
As shown in figure 5, GPRS radio-circuits 7 realize transparent transmission transmission communication using SIM900A modules, GPRS network passes through note
Volume establishes TCP server, input listening port number, and startup is connected to router outer net TCP/IP addresses and port, waits and receive guests
Family end is connected, and after client connection server end, the data received are forwarded into server end by GPRS.Wireless GPRS
Sensor network system communication process is that host computer is remotely sent into control command to node by GPRS network, and node receives control
Start data acquisition after system order, the data collected are then passed back into host computer by GPRS network, finally collection
Data are analyzed by host computer conversion process.
As shown in fig. 6, MCU microprocessors 5 use MSP430F5438 process chips, the frequency of clock circuit 6 is 16MHz, is led to
Cross and programming and burning are carried out to chip, control the collection and processing of whole strain signal.
This is used for the MEMS sensor GPRS acquisition nodes of civil structure health monitoring, during work, MEMS circuits 2 pass through from
Body micro mechanical vibration produces the built-in amplification of acceleration warp and is converted into voltage signal.Handled by the filter circuit 3 of periphery, at single-chip microcomputer
GPRS wireless telecommunications are carried out to acceleration signal after reason, received server-side to GPRS wireless modules 7 is forwarded by a serial ports
All node datas come, are finally presented on monitoring platform.The acceleration signal acquisition node of MEMS circuits 2 is widely used in machine
Tool vibration measurement has very big contribution with context of detection.It can reduce wiring, reduce monitoring system lower deployment cost, increase monitoring
Flexibility, maintainability and the scalability of system, judge to provide foundation for the trouble point of monitoring device.
Finally it should be noted that：Preferred embodiment of the present utility model is the foregoing is only, is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it can still modify to the technical scheme described in foregoing embodiments, or to which part technical characteristic
Progress equivalent substitution, all within the spirit and principles of the utility model, any modification, equivalent substitution and improvements made etc.,
It should be included within the scope of protection of the utility model.
Claims (4)
1. a kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring, including clock circuit (6), MCU are micro-
Processor (5) and MEMS circuits (2), it is characterised in that：The output end of the MEMS circuits (2) is electrically connected with filter circuit
(3), the output end of the filter circuit (3) is electrically connected with A/D convertor circuit (4), the A/D convertor circuit (4) and clock electricity
The output end on road (6) is electrically connected with the input of MCU microprocessors (5), the signal connection end of the MCU microprocessors (5)
It is connected with GPRS wireless modules (7), the input of the MEMS circuits (2), MCU microprocessors (5) and GPRS wireless modules (7)
Electric power management circuit (1) is electrically connected at, the signal of GPRS wireless modules (7) output inputs with external monitoring platform
Signal connection.
2. a kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring according to claim 1, its
It is characterised by：The MCU microprocessors (5) include：MSP430F5438 micro-chip processors, clock circuit module, GPRS are wireless mould
Block circuit, and MSP430F5438 micro-chip processors are electrically connected with clock circuit module and GPRS wireless modules circuit respectively.
3. a kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring according to claim 1, its
It is characterised by：The MEMS circuits (2) using piezo-electric effect accelerometer and LIS344ALH chips as self-vibration element, and
The built-in modulate circuit of MEMS circuits (2).
4. a kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring according to claim 1, its
It is characterised by：The electric power management circuit (1) is TLC2154 single power supply, and the voltage output of electric power management circuit (1)
End is provided with low pressure difference linear voltage regulator chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720291931.0U CN206627538U (en) | 2017-03-24 | 2017-03-24 | A kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720291931.0U CN206627538U (en) | 2017-03-24 | 2017-03-24 | A kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring |
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| Publication Number | Publication Date |
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| CN206627538U true CN206627538U (en) | 2017-11-10 |
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| CN201720291931.0U Expired - Fee Related CN206627538U (en) | 2017-03-24 | 2017-03-24 | A kind of MEMS sensor GPRS acquisition nodes for civil structure health monitoring |
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Granted publication date: 20171110 |