CN109632221A - A kind of bridge load response frequency-change sampling device based on vehicle triggering - Google Patents
A kind of bridge load response frequency-change sampling device based on vehicle triggering Download PDFInfo
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- CN109632221A CN109632221A CN201910031238.3A CN201910031238A CN109632221A CN 109632221 A CN109632221 A CN 109632221A CN 201910031238 A CN201910031238 A CN 201910031238A CN 109632221 A CN109632221 A CN 109632221A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0008—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of bridges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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- Aviation & Aerospace Engineering (AREA)
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Abstract
The present invention relates to a kind of bridge loads based on vehicle triggering to respond frequency-change sampling device comprising vehicle type recognition device, frequency conversion Acquisition Instrument, wireless transport module and host computer；Vehicle type recognition device will identify in real time highway operation vehicle, sorted signal is transmitted to frequency conversion Acquisition Instrument, the frequency-change sampling trigger signal as frequency conversion Acquisition Instrument；Frequency conversion Acquisition Instrument can change data sampling frequency in real time, and then the signal for being transmitted to vehicle type recognition device carries out frequency conversion acquisition storage；Frequency conversion Acquisition Instrument carries out information exchange through wireless transport module and host computer, and the collected signal of frequency conversion is transmitted in host computer by frequency conversion Acquisition Instrument through wireless transport module, carries out data real-time display and preservation by host computer；Host computer will preset configuration control signal and be transmitted to frequency conversion Acquisition Instrument through wireless transport module.The present invention is able to achieve frequency-change sampling, reduces data redundancy, guarantees the undistorted recovery of signal.
Description
Technical field
The present invention relates to a kind of bridge health monitoring fields, ring especially with regard to a kind of bridge load based on vehicle triggering
Answer frequency-change sampling device.
Background technique
The key of bridge health monitoring system is the accuracy of structural damage alarming and identification, structural reliability assessment with it is tired
The reliability of labor life appraisal both depends on the quality of signal.Signal quality depends on the quality of hardware in measurement process
With the range of data record, these all can generate very big difference to result.Therefore, in order to avoid those are due to missing true reflection
And the poor measurement work of preferable assessment result is obtained, the factor for needing emphasis to consider is: (1) recording the length of time: note
The time of record is longer, and the result of assessment is more accurate；Otherwise the time of record is shorter, can bear risk bring adverse consequences.(2)
Sample frequency: characterizing the speed of sampling, and sample frequency is high, then sampling is fast, and collected digital signal is low closer to actual signal
Sample frequency can make signal serious distortion.
For the quality for guaranteeing monitoring signals, the data volume mistake that structural response 24 hours real-time high frequencies can be acquired, but be acquired
In huge, transmission and the data processing in later period to data are excavated and are brought on a disaster.It is ideally empty using lesser storage
Between, and the reproduction original signal of information cannot be lost.Variable sampling frequency data acquisition system can be according to extraneous trigger signal
Real-time sampling rate adjusting.When being not received by trigger signal, sampled with lower sample frequency.It is triggered when receiving
When signal, according to trigger signal size, the sampling of a period of time is carried out using the higher sample frequency being set in advance.Reach
Sometime after length, it is automatically restored to low sample frequency.
Therefore, this contradiction of contradiction how solved between the mass data and wireless upload that high frequency acquisition generates becomes mesh
The technical issues of preceding urgent need to resolve.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of bridge loads based on vehicle triggering to respond frequency-change sampling
Device triggers bridge structure response (such as amount of deflection, strain) real-time online high frequency monitoring index according to type of vehicle,
It realizes frequency-change sampling, reduces data redundancy, guarantees the undistorted recovery of signal.
To achieve the above object, the present invention takes following technical scheme: a kind of bridge load response based on vehicle triggering
Frequency-change sampling device comprising vehicle type recognition device, frequency conversion Acquisition Instrument, wireless transport module and host computer；The vehicle
Type identification device will identify in real time highway operation vehicle, sorted signal is transmitted to the frequency conversion Acquisition Instrument, make
For the frequency-change sampling trigger signal of the frequency conversion Acquisition Instrument；The frequency conversion Acquisition Instrument can change data sampling frequency in real time, in turn
Signal for being transmitted to the vehicle type recognition device carries out frequency conversion acquisition storage；The frequency conversion Acquisition Instrument is through the nothing
Line transmission module and the host computer carry out information exchange, and the frequency conversion Acquisition Instrument is by the collected signal of frequency conversion through described wireless
Transmission module is transmitted in the host computer, carries out data real-time display and preservation by the host computer；The host computer will be pre-
First setting configuration control signal is transmitted to the frequency conversion Acquisition Instrument through the wireless transport module.
Further, to be previously provided with coil, image, infrared ray, millimetre-wave radar in the vehicle type recognition device existing
There is vehicle identification method, for being identified, being classified in real time to highway operation vehicle, and then identifies the type of vehicle, and conduct
The frequency-change sampling trigger signal of the frequency conversion Acquisition Instrument.
Further, the configuration control signal that presets includes frequency-change sampling frequency, sampling channel and triggering logic.
Further, the frequency conversion Acquisition Instrument includes single-chip microcontroller, FPGA and converter；The converter will receive
After the vehicle classification signal that the vehicle identifier is transmitted to carries out analog-to-digital conversion, it is transmitted to the FPGA, by described
FPGA triggering controls the converter and stores the signal after analog-to-digital conversion；The FPGA is connect with the single-chip microcontroller, described
Single-chip microcontroller is used to receive the configuration signal of the host computer and is transmitted to the FPGA.
Further, address latch, memory, nor gate, address counter, NOT gate and frequency dividing are provided in the FPGA
Circuit；The memory is for storing the signal that the converter is transmitted to, and the address latch and memory are through data
Bus is connect with the data port of the monolithic, and the address latch port of the single-chip microcontroller is also connect with the address latch,
And the configuration signal in the single-chip microcontroller is transmitted in the memory by the address latch；The piece of the single-chip microcontroller selects letter
Number port and read gate port are connect after the nor gate with the memory；The enabling signal port of the single-chip microcontroller will open
End signal is transmitted to the monolithic after dynamic signal is transmitted to the address counter, and the address counter counts
The conversion end signal port of machine；The address counter is also connect with the memory；Clock signal is through the frequency dividing circuit
Change over clock signal is obtained after processing, the change over clock signal is transmitted separately in the address counter and converter,
And the change over clock signal after non-goalkeeper's frequency dividing is transmitted in the memory and stores.
Further, the memory is the composition dual port RAM being made of built-in type array block.
Further, the clock signal has source crystal oscillator generation by 40MHz.
Further, the frequency dividing circuit uses frequency dividing phase-locked loop.
Further, the converter uses the AD conversion chip of model ADS930.
Further, the wireless transport module uses WIFI or 4G network.
The invention adopts the above technical scheme, which has the following advantages: 1, the present invention is according to setting type of vehicle, touching
Hair sensor acquisition equipment realizes frequency-change sampling, and when loaded vehicle passes through, high frequency is sampled, low-frequency sampling in the case of other, makes monitoring system
System has the function of real-time early warning, and meet the data demand of structure long-term damage identification, drastically reduces and wirelessly uploads
Data volume establishes high frequency flexiblity monitor system for the bridge without cable network near bridge site and provides guarantee, has important show
Sincere justice.2, the data volume of frequency-change sampling acquisition of the present invention is about 5% or so of legacy data amount, therefore in system operation mistake
Journey can save 95% 4G campus network, reduce system operation expense, while greatly improve the service life of sensor.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is frequency conversion Acquisition Instrument internal circuit configuration schematic diagram of the invention.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the present invention provides a kind of bridge load response frequency-change sampling device based on vehicle triggering comprising
Vehicle type recognition device 1, frequency conversion Acquisition Instrument 2, wireless transport module 3 and host computer 4.Vehicle type recognition device 1 will be to public affairs
Road vehicle in use is identified in real time, sorted signal is transmitted to frequency conversion Acquisition Instrument 2, and the frequency conversion as frequency conversion Acquisition Instrument 2 is adopted
Sample trigger signal；Frequency conversion Acquisition Instrument 2 can change data sampling frequency in real time, and then realize to for filling to vehicle type recognition
It sets the signal that 1 is transmitted to and carries out frequency conversion acquisition storage.Frequency conversion Acquisition Instrument 2 carries out information friendship through wireless transport module 3 and host computer 4
Mutually, the collected signal of frequency conversion is transmitted in host computer 4 by frequency conversion Acquisition Instrument 2 through wireless transport module 3, is carried out by host computer 4
Data real-time display and preservation；Meanwhile host computer 4 is by preset frequency-change sampling frequency, sampling channel and triggering logic etc.
Configuration control signal is transmitted to frequency conversion Acquisition Instrument 2 through wireless transport module 3, carries out corresponding configuration to frequency conversion Acquisition Instrument 2.
In a preferred embodiment, coil, image, infrared ray, milli are previously provided in vehicle type recognition device 1
The a variety of existing vehicle identification methods of metre wave radar for being identified, being classified in real time to highway operation vehicle, and then identify vehicle
Type, and the frequency-change sampling trigger signal as frequency conversion Acquisition Instrument 2.
In a preferred embodiment, as shown in Fig. 2, frequency conversion Acquisition Instrument 2 includes single-chip microcontroller, FPGA and converter.
After the vehicle classification signal that the vehicle identifier 1 received is transmitted to by converter carries out analog-to-digital conversion, it is transmitted to
FPGA is triggered the signal for controlling converter and storing after analog-to-digital conversion by FPGA；FPGA is connect with single-chip microcontroller, and single-chip microcontroller is used for
It receives the configuration signal of host computer 4 and is transmitted to FPGA.
It is provided with address latch, memory, nor gate, address counter, NOT gate in above-described embodiment, in FPGA and divides
Frequency circuit.Memory is for storing the signal that converter is transmitted to, and address latch and memory are through data/address bus and monolithic
Data port D0~D7 connection, the address latch port ALE of single-chip microcontroller also connect with address latch, and address latch will
Configuration signal in single-chip microcontroller is transmitted in memory；The chip selection signal port and read gate port of single-chip microcontroller after nor gate with
Memory connection.Enabling signal is transmitted to address counter, and address counter meter by the enabling signal port START of single-chip microcontroller
End signal is transmitted to the conversion end signal port EOC of single-chip microcontroller after number；Address counter is also connect with memory.
Change over clock signal is obtained after the divided processing of circuit of clock signal, change over clock signal is transmitted separately to address counter and AD
In converter, and the change over clock signal after non-goalkeeper frequency dividing is transmitted in memory and stores.
In above-described embodiment, memory is the composition dual port RAM being made of built-in type array block (EAB).
In the various embodiments described above, clock signal has source crystal oscillator generation by 40MHz；Frequency dividing circuit uses frequency dividing phase-locked loop, should
The divided phaselocked loop of clock signal obtains change over clock signal after carrying out 2 frequency dividings.
In the various embodiments described above, converter uses the AD conversion chip of model ADS930.The chip includes 4 tunnel difference
AD acquisition channel and 1 road DI digital signal acquiring channel are inputted, the frequency conversion of data is realized by multichannel Differential Input AD acquisition channel
Control and data buffer storage to ultra high speed A/D conversion are realized in acquisition by the control logic inside FPGA.
In use, the enabling signal port START by single-chip microcontroller starts converter, AD conversion is then controlled by FPGA
Device carries out analog-to-digital conversion, and change over clock has the divided frequency dividing of circuit 2 of source crystal oscillator to obtain by 40MHz.In use, logical resource accounts for
It is 40%, I/O utilization rate with rate is 45%.
In a preferred embodiment, WIFI or 4G network can be used in wireless transport module 3, passes data in real time
Host computer 4.
In conclusion when bridge needs to install health monitoring systems, through the invention to bridge structure in vehicle in use
Real-time response under effect carries out frequency-change sampling, and monitoring data can be wirelessly transferred medium-long range monitoring center, realizes loaded vehicle mistake
Bridge actual time safety early warning.
The various embodiments described above are merely to illustrate the present invention, and structure and size, setting position and the shape of each component are all can be with
It is varied, based on the technical solution of the present invention, the improvement and wait that all principles according to the present invention carry out individual part
With transformation, should not exclude except protection scope of the present invention.
Claims (10)
1. a kind of bridge load based on vehicle triggering responds frequency-change sampling device, it is characterised in that: including vehicle type recognition
Device, frequency conversion Acquisition Instrument, wireless transport module and host computer；The vehicle type recognition device will carry out highway operation vehicle
Identification, sorted signal are transmitted to the frequency conversion Acquisition Instrument in real time, and the frequency-change sampling as the frequency conversion Acquisition Instrument triggers letter
Number；The frequency conversion Acquisition Instrument can change data sampling frequency in real time, and then for being transmitted to the vehicle type recognition device
Signal carry out frequency conversion acquisition storage；The frequency conversion Acquisition Instrument carries out information friendship through the wireless transport module and the host computer
Mutually, the collected signal of frequency conversion is transmitted in the host computer by the frequency conversion Acquisition Instrument through the wireless transport module, by institute
It states host computer and carries out data real-time display and preservation；The host computer will preset configuration control signal through the wireless transmission
Module transfer is to the frequency conversion Acquisition Instrument.
2. device as described in claim 1, it is characterised in that: be previously provided with coil, figure in the vehicle type recognition device
The existing vehicle identification method of picture, infrared ray, millimetre-wave radar, for being identified, being classified in real time to highway operation vehicle, in turn
Identify the type of vehicle, and the frequency-change sampling trigger signal as the frequency conversion Acquisition Instrument.
3. device as described in claim 1, it is characterised in that: the configuration control signal that presets includes frequency-change sampling frequency
Rate, sampling channel and triggering logic.
4. such as any one of claims 1 to 3 described device, it is characterised in that: the frequency conversion Acquisition Instrument include single-chip microcontroller, FPGA and
Converter；The vehicle classification signal that the vehicle identifier received is transmitted to by the converter carries out mould
After number conversion, it is transmitted to the FPGA, the signal for controlling the converter and storing after analog-to-digital conversion is triggered by the FPGA；
The FPGA is connect with the single-chip microcontroller, and the single-chip microcontroller is used to receive the configuration signal of the host computer and is transmitted to described
FPGA。
5. device as claimed in claim 4, it is characterised in that: be provided with address latch, memory or non-in the FPGA
Door, address counter, NOT gate and frequency dividing circuit；The memory is described for storing the signal that the converter is transmitted to
Address latch and memory are connect through data/address bus with the data port of the monolithic, the address latch port of the single-chip microcontroller
Also it is connect with the address latch, and the configuration signal in the single-chip microcontroller is transmitted to the storage by the address latch
In device；The chip selection signal port and read gate port of the single-chip microcontroller are connect after the nor gate with the memory；It is described
After enabling signal is transmitted to the address counter by the enabling signal port of single-chip microcontroller, and the address counter counts
End signal is transmitted to the conversion end signal port of the single-chip microcontroller；The address counter also connects with the memory
It connects；Clock signal obtains change over clock signal after frequency dividing circuit processing, and the change over clock signal is transmitted separately to institute
It states in address counter and converter, and the change over clock signal after non-goalkeeper's frequency dividing is transmitted to the memory
Inside stored.
6. device as claimed in claim 5, it is characterised in that: the memory is the composition pair being made of built-in type array block
Mouth RAM.
7. device as claimed in claim 5, it is characterised in that: the clock signal has source crystal oscillator generation by 40MHz.
8. device as claimed in claim 5, it is characterised in that: the frequency dividing circuit uses frequency dividing phase-locked loop.
9. such as claim 4 or 5 described devices, it is characterised in that: the converter uses the AD conversion of model ADS930
Chip.
10. device as described in claim 1, it is characterised in that: the wireless transport module uses WIFI or 4G network.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910031238.3A CN109632221A (en) | 2019-01-14 | 2019-01-14 | A kind of bridge load response frequency-change sampling device based on vehicle triggering |
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| CN201910031238.3A CN109632221A (en) | 2019-01-14 | 2019-01-14 | A kind of bridge load response frequency-change sampling device based on vehicle triggering |
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| CN201910031238.3A Pending CN109632221A (en) | 2019-01-14 | 2019-01-14 | A kind of bridge load response frequency-change sampling device based on vehicle triggering |
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Application publication date: 20190416 |