CN207487647U - Bridge effective prestress data collecting instrument - Google Patents
Bridge effective prestress data collecting instrument Download PDFInfo
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- CN207487647U CN207487647U CN201721691280.0U CN201721691280U CN207487647U CN 207487647 U CN207487647 U CN 207487647U CN 201721691280 U CN201721691280 U CN 201721691280U CN 207487647 U CN207487647 U CN 207487647U
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Abstract
The utility model provides a kind of bridge effective prestress data collecting instrument, including displacement transducer signal input interface, hydrostatic sensor signal input interface, signal acquisition circuit, RS485 bus circuits, WiFi communication circuit and power supply circuit；The power supply circuit is connect respectively with the signal acquisition circuit, the RS485 bus circuits and the WiFi communication circuit, for powering to the signal acquisition circuit, the RS485 bus circuits and the WiFi communication circuit.Bridge effective prestress data collecting instrument provided by the utility model has the following advantages：Be capable of automatic and accurate to bridge prestress tensioning site operation parameter, i.e.,：Prestressed strand stretching extension value is monitored with stretching force, so as to improve parameter acquiring precision, finally improves the precision of prestressed stretch-draw.
Description
Technical field
The utility model belongs to bridge prestress detection technique field, and in particular to a kind of bridge effective prestress data are adopted
Collect instrument.
Background technology
In road bridge construction, bridge superstructure largely using pre-stress design, accurately applies according to design requirement and in advance should
Power becomes link important in bridge construction.By showing what is run in China to in-service pre-stressed bridge investigation and detection
In road and bridge, many scene tensioning process are lack of standardization, prestressed structure caused a large amount of cracks occur, so as to directly affect bridge
The safety of engineering and durability finally then influence the normal usage function of bridge.
To improve the bending resistance and rigidity of bridge member, increase the durability of component, and then improve the load-carrying energy of bridge
Power postpones the matter of time that crack occurs, real-time oversight is needed to control tensioning construction so that prestressed stretch-draw is rationally advised
Model.
At present, bridge prestress tensioning site operation still mainly obtains associated construction parameter using the method for artificial reading,
The acquisition of parameter is got by eye-observation, has certain error, so as to affect the precision of prestressed stretch-draw.
Utility model content
In view of the defects existing in the prior art, the utility model provides a kind of bridge effective prestress data collecting instrument, can
Effectively solve the above problems.
The technical solution adopted in the utility model is as follows：
The utility model provides a kind of bridge effective prestress data collecting instrument, is connect including displacement transducer signal input
Mouth, hydrostatic sensor signal input interface, signal acquisition circuit, RS485 bus circuits, WiFi communication circuit and power supply circuit；
The displacement transducer signal input interface with the output terminal of displacement sensor for connecting, institute's displacement sensors
Movable tap connect with the tensioning mechanism of prestressing force machine drawing；
The hydrostatic sensor signal input interface with the output terminal of hydrostatic sensor for connecting, the hydrostatic sensor
The hydralic pressure gauge of prestressing force machine drawing is connected to by adaptable interface；
The output terminal of the displacement transducer signal input interface and the hydrostatic sensor signal input interface leads to successively
After crossing the signal acquisition circuit and the RS485 bus circuits, it is connected to the WiFi communication circuit；
The power supply circuit is electric with the signal acquisition circuit, the RS485 bus circuits and the WiFi communication respectively
Road connects, for powering to the signal acquisition circuit, the RS485 bus circuits and the WiFi communication circuit.
Preferably, the signal acquisition circuit includes sequentially connected signal gating circuit, signal amplification circuit, signal filter
Wave circuit and A/D convertor circuit.
Preferably, the power supply circuit includes D.C. regulated power supply, lithium battery charging circuit, lithium battery, the 1st decompression electricity
Road, booster circuit, the 2nd reduction voltage circuit and battery capacity management circuit；
The output terminal of the D.C. regulated power supply is connected to the charging end of lithium battery by the lithium battery charging circuit；Institute
State lithium battery the 1st feeder ear pass sequentially through the 1st reduction voltage circuit and the booster circuit after, respectively with the signal acquisition
Circuit, the displacement transducer signal input interface are connected with the hydrostatic sensor signal input interface, for the letter
Number Acquisition Circuit, the displacement transducer signal input interface and the hydrostatic sensor are signal-powered；The 2nd of the lithium battery
Feeder ear is connected to the input terminal of the 2nd reduction voltage circuit；1st feeder ear of the 2nd reduction voltage circuit and the WiFi communication
Circuit connects, for powering to the WiFi communication circuit；2nd feeder ear of the 2nd reduction voltage circuit and the RS485 buses
Circuit connects, for powering to the RS485 bus circuits；3rd feeder ear of the 2nd reduction voltage circuit passes through battery electricity
After buret reason circuit, it is connected to electric quantity display circuit.
Bridge effective prestress data collecting instrument provided by the utility model has the following advantages：
Be capable of automatic and accurate to bridge prestress tensioning site operation parameter, i.e.,：Prestressed strand stretching extension value with
Stretching force is monitored, and so as to improve parameter acquiring precision, finally improves the precision of prestressed stretch-draw.
Description of the drawings
Fig. 1 is the structure diagram of bridge effective prestress data collecting instrument provided by the utility model；
Fig. 2 is the structure chart of bridge effective prestress data collecting system provided by the utility model.
Specific embodiment
The technical issues of in order to solve the utility model, technical solution and advantageous effect are more clearly understood, below
With reference to accompanying drawings and embodiments, the present invention is further described in detail.It should be appreciated that specific implementation described herein
Example only to explain the utility model, is not used to limit the utility model.
Theory is with actually showing in bridge internal reservation stress hole, and bury reinforcing bar, prestressed stretch-draw is carried out after molding to be had
Effect ground improves the compression strength and rigidity of bridge member, increases the durability of component, and then improves the lifting capacity of bridge, postpones
The time that crack occurs, therefore pre-stressed bridge design method is widely adopted in modern Bridge Design.In stretching construction,
Tension stress and strain need to be subject to accurately to control to reach pre-stress design original intention and to prevent pulling force is excessive to cause in bridge
The purpose of portion's cable wire (prestressed strand) fracture.
For convenience of bridge prestress stretching construction, the accuracy of measurement of prestressed stretch-draw is improved, the safety for reducing bridge is hidden
Suffer from.The utility model stretching force and stretching extension value of interest to tensioning construction process realize real time monitoring, so as to
Real-time oversight tensioning construction process controls the size and the uniformity of effective prestress so that prestressed stretch-draw is rationally advised
Model, it is ensured that bridge prestress stretching construction quality meets design and code requirement.
The bridge effective prestress data collecting instrument of the utility model design is based on displacement sensor, hydrostatic sensor, mould
The technologies such as number signal conversion realize bridge prestress stretching construction intelligent monitor system by design, measure obtain tensioning in real time
Intensity and tensioning displacement so that tensioning construction technique efficiently accomplishes, it is ensured that bridge prestress stretching construction quality meets
Design and code requirement, being finally reached reduces when the preceding purpose that bridge prestress hidden danger of quality is caused due to construction wrong.
With reference to figure 1, the utility model provides a kind of bridge effective prestress data collecting instrument, including displacement transducer signal
Input interface, hydrostatic sensor signal input interface, signal acquisition circuit, RS485 bus circuits, WiFi communication circuit and power supply
Circuit；
Displacement transducer signal input interface for being connect with the output terminal of displacement sensor, take out by the activity of displacement sensor
Head is connect with the tensioning mechanism of prestressing force machine drawing；
For hydrostatic sensor signal input interface for being connect with the output terminal of hydrostatic sensor, hydrostatic sensor passes through adaptation
Interface is connected to the hydralic pressure gauge of prestressing force machine drawing；
The output terminal of displacement transducer signal input interface and hydrostatic sensor signal input interface passes sequentially through signal and adopts
After collector and RS485 bus circuits, it is connected to WiFi communication circuit；
Power supply circuit is connect respectively with signal acquisition circuit, RS485 bus circuits and WiFi communication circuit, for signal
Acquisition Circuit, RS485 bus circuits and the power supply of WiFi communication circuit.
Wherein, signal acquisition circuit includes sequentially connected signal gating circuit, signal amplification circuit, signal filter circuit
And A/D convertor circuit.
Power supply circuit include D.C. regulated power supply, lithium battery charging circuit, lithium battery, the 1st reduction voltage circuit, booster circuit,
2nd reduction voltage circuit and battery capacity management circuit；
The output terminal of D.C. regulated power supply is connected to the charging end of lithium battery by lithium battery charging circuit；The of lithium battery
After 1 feeder ear passes sequentially through the 1st reduction voltage circuit and booster circuit, inputted respectively with signal acquisition circuit, displacement transducer signal
Interface is connected with hydrostatic sensor signal input interface, for signal acquisition circuit, displacement transducer signal input interface and
Hydrostatic sensor is signal-powered；2nd feeder ear of lithium battery is connected to the input terminal of the 2nd reduction voltage circuit；The of 2nd reduction voltage circuit
1 feeder ear is connect with WiFi communication circuit, for powering to WiFi communication circuit；2nd feeder ear of the 2nd reduction voltage circuit with
RS485 bus circuits connect, for powering to RS485 bus circuits；3rd feeder ear of the 2nd reduction voltage circuit passes through battery capacity
After managing circuit, it is connected to electric quantity display circuit.
Effective prestress detector functional parameter：
(1) electric quantity indication function
Detector electric quantity indicating function：Electricity is indicated using 5 LED, and charging or working condition show battery capacity shape
State.
(2) signal processing and wireless communication function
1) collection of simulant signal
Detector can acquire 2 road analog current signals, and the current signal of acquisition is converted into digital signal, passes through WiFi circuitry
Communication uploads data and gives test platform terminal.
2) wireless communication function
Test platform terminal has WiFi communication function, provides reliable and stable communication in the range of 30 meters.Test platform terminal
After being connect with detector WiFi, communicated by agreement and data acquisition circuit, and digital signal is uploaded to test platform terminal
Carry out data processing.
(3) performance indicator
1) battery capacity indication
Using 5 LED indicating battery electric quantity ranges.
2) current signal acquires
Acquire 2 tunnel analog signals：4~20mA electric currents, measurement accuracy 1%, resolution ratio 12bit.
Hardware design：Effective prestress detector system is by 1 hydraulic pump, displacement sensor, hydrostatic sensor, effectively pre-
Tension gauge and test platform terminal composition.Hydrostatic sensor is connected to detector on hydraulic pump, by cable, and displacement passes
Sensor is mounted on gearshift, and by hydraulic pump control gearshift, displacement sensor is connected to detector by cable.Liquid
Pressure sensor and displacement sensor are required for detector to power.Detector is connect with test platform by WiFi, and composition is complete
Test platform.As shown in Figure 2.
(4) effective prestress detector hardware forms
Effective prestress detector hardware mainly turns serial port circuit group by electric power management circuit, data acquisition circuit, WiFi
Into.Electric power management circuit includes managing electric quantity circuit, rechargeable lithium battery, battery charger, power supply power voltage step down circuit, electricity
Source current booster circuit, RS485 bus circuits.Data acquisition circuit and WiFi turn serial port circuit.
It describes in detail below to the fractional hardware being related to：
(1) lithium battery charging circuit
The utility model can support 19V~27V D.C. regulated power supplies to input, and select MAX8725ETI charging management chips,
It can charge to 14.8V rechargeable lithium batteries, fully charged is 16.8V, and adjusts charging current as 1A, the chip input voltage range
Extensively, output off current HIGH, voltage stabilization.
(2) power voltage step down circuit
Since input allowed band is in 19V~27V, and lithium battery voltage range is being rushed to can guarantee in 11V~16.8V
It is worked normally under electric and non-charged state, this power circuit uses MAX17502 chips, can meet the wide scope electricity in the design
Source inputs, and 3.3V is stabilized the output voltage between 11V~27V, it is possible to provide to electric quantity display circuit, when access power source charges are same
When, electric quantity display circuit is controlled by control power pins, is that WiFi power supplys are broken when this equipment is not keyed up power switch at this time
It opens, the charging of WiFi circuitry circuit is avoided to cut and is opened under no handling situations.
Since lithium battery voltage range is between 12V~16.8V, and outer power voltage is between 19V~27V, voltage
Range is larger, and power supply power voltage step down circuit employs two kinds of circuit arrangements, and a kind of scheme is supplied to using after LM2596 decompressions
Power boost circuit；Another kind be using MAX17502 schemes decompression after be supplied to battery management circuit, RS485 bus circuits,
WiFi circuitry.When external power input charges, MAX17502 circuits are opened by external power supply, and power supply is provided for MCU circuits
Information about power during display charging.
(3) power boost circuit
Since input allowed band is in 19V~27V, and lithium battery voltage range is being rushed to can guarantee in 11V~16.8V
It is worked normally under electric and non-charged state, this power circuit is first depressured to the stabilized power source of 9V using LM2596-ADJ chips, should
Chip highest output current is up to the power supply chip of 3A, and input voltage range is wide, output off current HIGH, voltage stabilization.By stabilization
It carries out using MP3425DL chips boosting to 24V DC power supplies after decompression, provides for sensor and Acquisition Circuit and stablize electricity
Source.]
Therefore, power supply power boost circuit uses MP3425DL schemes, to avoid input voltage range is excessive from causing to boost
Circuit is unstable, power supply is provided by LM2596 voltage stabilizings 9V, by obtaining 24V power supplys after boosting.It is passed for Acquisition Circuit, displacement displacement
Sensor is powered.
(4) signal acquisition circuit, RS485 and WiFi communication circuit
Signal acquisition circuit uses Kang Naide data acquisition circuits, this circuital current acquisition range is used in 4~20mA
After analogue data is converted into data-signal by this circuit, bunchiness is converted by RS485 communicating circuits for modbus rtu communications protocol
Mouthful data, then with WiFi communication, the signal of acquisition is uploaded to control terminal by WiFi.
Signal acquisition circuit is 500Hz to collection of simulant signal frequency, and the data for returning platform terminal are 13 data, are pressed
It is 9600 according to acquiescence communication baud rate, in addition WiFi circuitry and Acquisition Circuit communication time, 20ms need to be more than by reading data time,
For ensure digital independent correctness and combine practical application (data do not need to intensive reading), read data time be set to more than etc.
A data are taken in 100ms.If you need to more crypto set gathered data, communication baud rate can be adjusted as needed.
Lattice network selects the USR-WIFI232-B2 modules of someone scientific ＆ technical corporation, and USR-WIFI232-B2 is a one
The module of the 802.11b/g/n Wi-Fi of change, it is provided a kind of is connected to Wi-Fi wireless networks by the physical equipment of user
On, and the solution of the interface transmission datas such as UART serial ports is provided.By this lattice network, Internet of Things can be easily realized
Network controls and management.
WiFi circuitry and signal acquisition circuit are by RS485 bus communications.The continual acquisition mould of signal acquisition circuit
Intend signal, test platform terminal reads the digital signal of signal acquisition circuit by instruction after being connect with WiFi circuitry, RS485 is total
Line plays function served as bridge between WiFi circuitry and signal acquisition circuit, and main control unit is WiFi circuitry.
(5) battery capacity management circuit
Electricity shows that using two schemes when one kind is lithium battery band bus communication, MCU passes through SMBus agreements and battery
Battery level information is read in communication；Another kind be lithium battery without bus communication when MCU judged by acquiring cell voltage mode
Electricity.After reading battery capacity, information about power is shown by 5 LED.
When battery uses band bus, in charging or non-charged state, MCU can read electricity by bus,
MCU controls 5 LED lamp all lights during electricity full state；MCU controls 1 LED lamp bright when electricity is low；The low detector of electricity
Can not normal use, indicate minimum electricity LED will use flicker represent.
When battery is without bus, MCU needs the voltage for acquiring cell voltage and power supply adaptor input.Lithium battery is charging
When can generate false voltage, be not battery electricity itself, so this scheme, there are two types of state, one kind is charged state, another
Kind is non-charged state.When in charged state, MCU needs to acquire cell voltage and power supply adaptor input voltage to judge electricity
Amount.Reading cell voltage is needed to judge electricity if being non-charged state.Control 5 LED show electricity display mode with
Band bus display mode is the same.
The utility model selects MCU control circuit chip STM32F103C8, MCU to be adopted by acquiring electric quantity of lithium battery information
With 5 can LED light carry out battery capacity indication by electricity percentage, an instruction is shown as 20% electricity, and 5 indicator light all lights are
100%, in charged state, the indicator light within percentage will flicker, it is non-rush that electricity is less than 10% under electricity condition when,
Minimum instruction electricity LED light will flicker warning and remind.
(6) electricity is shown
Power supply adaptor access detector charging or open detection instrument just show electricity when switching.Detector power switch
In the state being not turned on, access power supply adaptor charging can open electricity and show, until power supply adaptor disconnection just will not
Show electricity.For detector when non-charged state opens power switch, normality is shown electricity by electricity, until power switch is closed
It will not just show electricity.
Bridge effective prestress data collecting instrument provided by the utility model has the following advantages：
Be capable of automatic and accurate to bridge prestress tensioning site operation parameter, i.e.,：Prestressed strand stretching extension value with
Stretching force is monitored, and so as to improve parameter acquiring precision, finally improves the precision of prestressed stretch-draw.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, under the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these improve and
Retouching should also regard the scope of protection of the utility model.
Claims (3)
1. a kind of bridge effective prestress data collecting instrument, which is characterized in that including displacement transducer signal input interface, hydraulic pressure
Sensor signal input interface, signal acquisition circuit, RS485 bus circuits, WiFi communication circuit and power supply circuit；
The displacement transducer signal input interface with the output terminal of displacement sensor for connecting, the work of institute's displacement sensors
Dynamic tap is connect with the tensioning mechanism of prestressing force machine drawing；
For being connect with the output terminal of hydrostatic sensor, the hydrostatic sensor passes through the hydrostatic sensor signal input interface
Adaptable interface is connected to the hydralic pressure gauge of prestressing force machine drawing；
The output terminal of the displacement transducer signal input interface and the hydrostatic sensor signal input interface passes sequentially through institute
After stating signal acquisition circuit and the RS485 bus circuits, it is connected to the WiFi communication circuit；
The power supply circuit connects respectively with the signal acquisition circuit, the RS485 bus circuits and the WiFi communication circuit
It connects, for powering to the signal acquisition circuit, the RS485 bus circuits and the WiFi communication circuit.
2. bridge effective prestress data collecting instrument according to claim 1, which is characterized in that the signal acquisition circuit
Including sequentially connected signal gating circuit, signal amplification circuit, signal filter circuit and A/D convertor circuit.
3. bridge effective prestress data collecting instrument according to claim 1, which is characterized in that the power supply circuit includes
D.C. regulated power supply, lithium battery charging circuit, lithium battery, the 1st reduction voltage circuit, booster circuit, the 2nd reduction voltage circuit and battery capacity
Manage circuit；
The output terminal of the D.C. regulated power supply is connected to the charging end of lithium battery by the lithium battery charging circuit；The lithium
It is electric with the signal acquisition respectively after 1st feeder ear of battery passes sequentially through the 1st reduction voltage circuit and the booster circuit
Road, the displacement transducer signal input interface are connected with the hydrostatic sensor signal input interface, for the signal
Acquisition Circuit, the displacement transducer signal input interface and the hydrostatic sensor are signal-powered；The 2nd of the lithium battery supplies
Electric end is connected to the input terminal of the 2nd reduction voltage circuit；1st feeder ear of the 2nd reduction voltage circuit and WiFi communication electricity
Road connects, for powering to the WiFi communication circuit；2nd feeder ear of the 2nd reduction voltage circuit and RS485 buses electricity
Road connects, for powering to the RS485 bus circuits；3rd feeder ear of the 2nd reduction voltage circuit passes through the battery capacity
After managing circuit, it is connected to electric quantity display circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721691280.0U CN207487647U (en) | 2017-12-07 | 2017-12-07 | Bridge effective prestress data collecting instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721691280.0U CN207487647U (en) | 2017-12-07 | 2017-12-07 | Bridge effective prestress data collecting instrument |
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| CN207487647U true CN207487647U (en) | 2018-06-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830835A (en) * | 2017-12-07 | 2018-03-23 | 云南航天工程物探检测股份有限公司 | Bridge effective prestress detector and bridge effective prestress detection method |
-
2017
- 2017-12-07 CN CN201721691280.0U patent/CN207487647U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830835A (en) * | 2017-12-07 | 2018-03-23 | 云南航天工程物探检测股份有限公司 | Bridge effective prestress detector and bridge effective prestress detection method |
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