CN207779328U - A kind of bridge stress measurement system based on wireless transmission - Google Patents
A kind of bridge stress measurement system based on wireless transmission Download PDFInfo
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- CN207779328U CN207779328U CN201721530435.2U CN201721530435U CN207779328U CN 207779328 U CN207779328 U CN 207779328U CN 201721530435 U CN201721530435 U CN 201721530435U CN 207779328 U CN207779328 U CN 207779328U
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Abstract
The utility model is related to bridge ess-strain and technical field of frequency measurement, in particular a kind of bridge stress measurement system based on wireless transmission, including the fixed stress strain gauge of several place's bridge survey points and wireless data collection device and computer terminal；The contact surface of the stress strain gauge and bridge is fitted closely using strong viscosity connection with bridge, the stress strain gauge is connected with wireless data collection device by data line, by high speed communication wireless network connection between the wireless data collection device, pass through wireless network connection between the wireless data collection device and computer terminal；The wireless data collection device includes supply unit.The utility model is at low cost, easy to install and use, and without being equipped with alternating current, a kind of sensor can be realized simultaneously stress and frequency parameter measures, while can in real time be monitored to bridge information, and the safety of guarantee bridge significantly can property.
Description
Technical field
It is specially a kind of based on wireless transmission the utility model is related to bridge ess-strain and technical field of frequency measurement
Bridge stress measurement system.
Background technology
With the fast development of China's communication, bridge is as the important ring in traffic, in the process developed the economy
In play very important effect.But bridge is in use, it can be because aging or unpredictable element lead to performance
Decline or hidden danger of quality, serious generation cave-in accident.In order to ensure bridge uses the safety of process, the carrying energy of bridge is coped with
Power carries out periodic detection assessment or carries out long-term real-time monitoring to the important parameter of bridge.
Wireless type bridge survey system includes the measurement to parameters such as deflection of bridge span, ess-strain, intrinsic frequency, inclination angles,
Data use wireless way for transmitting.Wherein ess-strain and oneself shake frequency is the important ginseng assessed Bridge Design performance and whether changed
Number.Stress-strain measuring method mainly has resistance strain plate mensuration, fiber grating mensuration, digital display dial gauge method, vibratory string
Sensor method and photoelasticimetry method；There are relative type motor vibration measurement and absolute type vibration measurement from the main method of shake frequency measurement
Deng.
Presently, there are conventional bridge ess-strain with frequency measurement surveyed using two different types of sensors
Amount, cost is undoubtedly significantly increased by the way of two sensor measurements；Wired connection, cabling pole are used between measurement point
For difficulty；Measuring system traditional simultaneously is generally powered using general 220V modes, needs to carry out wiring power supply using alternating current,
Application conditions are very harsh.
Utility model content
A series of problems, such as the utility model is directed to current of high cost, difficult wiring, application conditions limitation is high, provides one kind
Easy to install and use, without being equipped with alternating current, a kind of sensor can be realized simultaneously stress and frequency parameter measures based on wireless
The bridge stress measurement system of transmission.
To achieve the above object, the utility model provides the following technical solutions：
A kind of bridge stress measurement system based on wireless transmission, including the fixed ess-strain of several place's bridge survey points
Sensor and wireless data collection device and computer terminal；The contact surface of the stress strain gauge and bridge is using strong
Viscosity connection is fitted closely with bridge, and the stress strain gauge is connected with wireless data collection device by data line, institute
It states between wireless data collection device through high speed communication wireless network connection, the wireless data collection device and computer terminal
Between pass through wireless network connection；The wireless data collection device includes supply unit.
Preferably, the stress strain gauge includes resistance strain gage.
Preferably, the contact surface of the wireless data collection device and bridge is fixed using weak viscosity connection with bridge.
Preferably, the wireless data collection device further includes operational amplifier, filter, A/D converter and wireless biography
Defeated unit.
Preferably, the wireless transmission unit use NRF24L0L integrated chips, and with the input of the A/D converter
End electrical connection.
Preferably, the supply unit uses 9V lithium batteries, voltage stabilization is 5V using three terminal regulator, and power supply is just
Pole is concatenated by conducting wire with the ports VCC of the operational amplifier, the filter respectively.
Compared with prior art, the beneficial effects of the utility model：Supply unit described in the utility model is using 9V lithium electricity
Pond, without being equipped with alternating current；Realize that a kind of stress strain gauge can be realized simultaneously stress and frequency parameter measures simultaneously, no
Only compact, it is easy for installation, greatly reduce cost；And connecting wireless data collection device by data line can will adopt
The bridge ess-strain and vibration frequency signal collected is wirelessly transferred, it is ensured that is monitored in real time to bridge information, significantly
Ensure that the safety of bridge can property.
Between the utility model measurement point independently of each other, data interaction is completed by the way of wireless networking；Ess-strain
It is to measure bridge knot with strain ga(u)ge that foil gauge electrical measuring method, foil gauge electrical measuring method are used when sensor measurement bridge ess-strain
The surface strain of structure determines a kind of Stress analysis from test result method of component surface stress state further according to the relationship of strain-stress；
Frequency measurement mode uses FFT principles, and the real-time curve of ess-strain is transformed into frequency domain in computer terminal, can be reflected
The spectrum curve figure of bridge obtains value of frequency point.Stress strain gauge in measurement point is connected and fixed closely with the strong viscosity of bridge
In conjunction with, wireless data collection device is connected and fixed with the weak viscosity of bridge, and installation is extremely convenient, is not necessarily to any peripheral auxiliary equipment,
Installation can be completed in one to two installation personnel, greatly reduces the installation difficulty of whole system.Data acquisition is set simultaneously
It is standby interior equipped with supply unit, it is connected up without mains-supplied, greatly reduces installation difficulty, while reducing cost.
Description of the drawings
Fig. 1 is the integral installation structural schematic diagram of the utility model；
Fig. 2 is the block diagram representation of the utility model.
In figure：1, bridge；2, wireless data collection device；3, stress strain gauge.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
- 2 are please referred to Fig.1, the utility model provides a kind of technical solution：
A kind of bridge stress measurement system based on wireless transmission, including the fixed stress of several 1 measurement points of place's bridge are answered
Become sensor 3 and wireless data collection device 2 and computer terminal；The contact surface of the stress strain gauge 3 and bridge 1
It is fitted closely using with strongly adherent glue and bridge 1, the stress strain gauge 3 is logical with wireless data collection device 2
It crosses data line to be connected, by using 2.4G high-speed network communications, the wireless data between the wireless data collection device 2
It is filled including power supply by 2.4G high-speed network connections, the wireless data collection device 2 between collecting device 2 and computer terminal
It sets, while stress strain gauge 3 and wireless data collection device 2 use super low-power consumption, can be used for a long time.The ess-strain
Sensor 3 includes resistance strain gage；The contact surface of the wireless data collection device 2 and bridge 1 is used with the double of weak viscosity
Face glue is fixed with bridge 1；The wireless data collection device 2 further includes operational amplifier, filter, A/D converter and wireless
Transmission unit；The wireless transmission unit uses NRF24L0L integrated chips, and is electrically connected with the input terminal of the A/D converter
It connects；The supply unit uses 9V lithium batteries, voltage stabilization is 5V using three terminal regulator, and positive pole is respectively by leading
Line is concatenated with the ports VCC of the operational amplifier, the filter；The filter uses MAX267, the operation amplifier
Device uses MAX4471, the A/D converter to be made of A/DC0, A/DC1 and A/DC2, No. 5 pins and A/ of the filter
The output end of DC0 concatenates, and No. 2 pins of the filter are concatenated with No. 2 pins of the operational amplifier, the operation amplifier
No. 7 pins of device are concatenated with A/DC2, and a comparator is additionally provided in the filter, and comparator uses MAX9028, the filter
No. 1 pin connection of No. 7 pins of wave device and comparator and it is in parallel there are one 20K resistance R12.
Operation principle：Stress strain gauge 3 uses foil gauge electrical measuring method, foil gauge electrical measurement when measuring bridge ess-strain
Method is that the surface strain of bridge structure is measured with strain ga(u)ge, and component surface stress is determined further according to the relationship of strain-stress
A kind of Stress analysis from test result method of state.When measurement, resistance strain gage is pasted onto part measured surface.When part is in load
When the lower generation of effect strains, corresponding resistance variations occur for resistance strain gage, measure this variation with deformeter, can both calculate
The strain and stress of measured point.Frequency measurement mode uses FFT principles, converts the real-time curve of ess-strain in computer terminal
It to frequency domain, can reflect the spectrum curve figure of bridge, obtain value of frequency point.Frequency of use sensor is not needed.It is mainly logical
The resistance strain gage of measurement point installation is crossed to measure bridge variation.
3 measurement range of stress strain gauge is big, is suitable for the monitoring of most bridges；Nonlinearity erron is 2%, number
According to precision height, deviation is small；Size is small, light-weight, and degree of protection IP67 is hardly damaged；It is easily installed and safeguards, operating temperature model
- 20~80 DEG C are enclosed, disclosure satisfy that field long term monitoring or the requirement of Short-Term Monitoring of bridge；Convenient for multiple spot monitoring, it is easy to collect
In, measurement data can be transmitted at a distance convenient for record.
The sensor special that the utility model is combined into one by using ess-strain and two kinds of functions of vibration frequency,
The measurement under a variety of application models to two parameters of stress and frequency can be realized, not only compact, easy for installation, significantly
Reduce cost；And connecting wireless data collection device by data line can be by collected bridge ess-strain and vibration
Frequency signal is wirelessly transferred, it is ensured that is monitored in real time to bridge information, ensures that the safety of bridge can property significantly.
Between the utility model measurement point independently of each other, data interaction is completed by the way of wireless networking；Ess-strain
Measurement method uses strain bridge principle, stress strain gauge 3 to be capable of the strained situation of Real-time Feedback bridge 1；Frequency measurement side
Formula uses FFT principles, and the real-time curve of ess-strain is transformed into frequency domain in computer terminal, can reflect the frequency of bridge 1
It sets a song to music line chart, obtains value of frequency point.Stress strain gauge 3 in measurement point is connected and fixed with bridge the last 1 viscosity combines closely, nothing
Line data acquisition equipment 2 is connected and fixed with 1 weak viscosity of bridge, installation it is extremely convenient, be not necessarily to any peripheral auxiliary equipment, one to
Installation can be completed in two installation personnels, greatly reduces the installation difficulty of whole system.Simultaneously in wireless data collection device 2
It equipped with supply unit, is connected up without mains-supplied, greatly reduces installation difficulty, while reducing the cost of system.
Basic principles, main features, and advantages of the present invention has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Be only the utility model preference, be not intended to limit the utility model, do not departing from the spirit and scope of the utility model
Under the premise of, the utility model also has various changes and improvements, these changes and improvements both fall within this claimed practicality
In novel range.The protection scope of the present invention is defined by the appended claims and their equivalents.
Claims (6)
1. a kind of bridge stress measurement system based on wireless transmission, it is characterised in that：Solid point is measured including several place's bridges (1)
Fixed stress strain gauge (3) and wireless data collection device (2) and computer terminal；The stress strain gauge (3)
Connect using strong viscosity with the contact surface of bridge (1) and is fitted closely with bridge (1), the stress strain gauge (3) and wirelessly
Data acquisition equipment (2) is connected by data line, passes through wireless network connection, institute between the wireless data collection device (2)
It states wireless data collection device (2) and passes through wireless network connection between computer terminal；Wireless data collection device (2) packet
Include supply unit.
2. a kind of bridge stress measurement system based on wireless transmission according to claim 1, it is characterised in that：It is described to answer
Stress-strain sensor (3) includes resistance strain gage.
3. a kind of bridge stress measurement system based on wireless transmission according to claim 1, it is characterised in that：The nothing
Line data acquisition equipment (2) is connect with the contact surface of bridge (1) using weak viscosity fixed with bridge (1).
4. a kind of bridge stress measurement system based on wireless transmission according to claim 1, it is characterised in that：The nothing
Line data acquisition equipment (2) further includes operational amplifier, filter, A/D converter and wireless transmission unit.
5. a kind of bridge stress measurement system based on wireless transmission according to claim 4, it is characterised in that：The nothing
Line transmission unit uses NRF24L0L integrated chips, and is electrically connected with the input terminal of the A/D converter.
6. a kind of bridge stress measurement system based on wireless transmission according to claim 1, it is characterised in that：The electricity
Source device uses 9V lithium batteries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721530435.2U CN207779328U (en) | 2017-11-16 | 2017-11-16 | A kind of bridge stress measurement system based on wireless transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721530435.2U CN207779328U (en) | 2017-11-16 | 2017-11-16 | A kind of bridge stress measurement system based on wireless transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207779328U true CN207779328U (en) | 2018-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721530435.2U Active CN207779328U (en) | 2017-11-16 | 2017-11-16 | A kind of bridge stress measurement system based on wireless transmission |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708565A (en) * | 2019-02-14 | 2019-05-03 | 北京市劳动保护科学研究所 | A kind of monitoring device and system of truss structure |
| CN112033585A (en) * | 2020-09-01 | 2020-12-04 | 天津动网信息科技有限公司 | Stress sensing device capable of being welded and installed |
-
2017
- 2017-11-16 CN CN201721530435.2U patent/CN207779328U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708565A (en) * | 2019-02-14 | 2019-05-03 | 北京市劳动保护科学研究所 | A kind of monitoring device and system of truss structure |
| CN112033585A (en) * | 2020-09-01 | 2020-12-04 | 天津动网信息科技有限公司 | Stress sensing device capable of being welded and installed |
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