CN104452555B - The pavement disease detection synchronous acquisition system of high-precision signal and synchronous collection method thereof - Google Patents
The pavement disease detection synchronous acquisition system of high-precision signal and synchronous collection method thereof Download PDFInfo
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- CN104452555B CN104452555B CN201410577210.7A CN201410577210A CN104452555B CN 104452555 B CN104452555 B CN 104452555B CN 201410577210 A CN201410577210 A CN 201410577210A CN 104452555 B CN104452555 B CN 104452555B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/01—Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
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Abstract
The present invention relates to a kind of pavement disease detection synchronous acquisition system of high-precision signal and synchronous collection method thereof, this acquisition system GPS module receiving satellite signal, and be connected with the signal of MCU data processing module and frequency reference referrer module, frequency reference referrer module is connected with A/D analog to digital conversion module, timing module, A/D analog to digital conversion module is connected with employing fifo module, timing module is connected with A/D analog to digital conversion module, time fifo module, adopts fifo module and time fifo module to be connected with MCU data processing module respectively. The data frame that the present invention exports calculates the relative time corresponding to this point according to the clock count number of sampling, when MCU data processing module starts sampling work, according to the GPS time service information obtained, each relative time in data frame is added that GPS time service information obtains the absolute moment of this some correspondence, acquisition precision height, stable performance, it may also be useful to convenience, synchronous effect are good.
Description
Technical field
The present invention relates to pavement of road Defect inspection field of information processing, in particular to a kind of pavement disease detection synchronous acquisition system of high-precision signal and synchronous collection method thereof.
Background technology
At present, owing to motorway wagon flow amount is big, the speed of a motor vehicle is fast, overweight car is many, the impact by outside climatic factor is added, pavement disease comes soon than general road, and disease development is rapid, difficulty of governance is big, and prolongation in time can be on the rise, and then have influence on the normal traveling of vehicle. Therefore, how carrying out detecting and renovating fast and effectively to express highway pavement disease is have important Research Significance.
There is following problem in existing road conditions Fast Detection Technique: the collecting sensor signal precision for pavement detection is low, signal poor synchronization, owing to the clock of different system is inconsistent, thus, cause the image data for the sensor being distributed in different positions cannot realize signal analysis or the related operation of time correlation, thus data and the signal processing of system level cannot be carried out, cannot obtain more about pavement disease parameter information.
Summary of the invention
For deficiency of the prior art, the present invention provides a kind of acquisition precision height, the pavement disease of good performance detection synchronous acquisition system of high-precision signal and synchronous collection method thereof.
According to design provided by the present invention, a kind of pavement disease detection synchronous acquisition system of high-precision signal, comprise GPS module, frequency reference referrer module, A/D analog to digital conversion module, simulating signal module, timing module, sampling fifo module, time fifo module and MCU data processing module, GPS module receives gps satellite signal by GPS receiver module, GPS module output terminal respectively with the connecting with signal of MCU data processing module and frequency reference referrer module, frequency reference referrer module output terminal and A/D analog to digital conversion module and timing module connect with signal, the simulating signal of A/D analog to digital conversion module receiving sensor, A/D analog to digital conversion module output terminal connects with signal with sampling fifo module, timing module output terminal is connected with time fifo module with A/D analog to digital conversion module respectively, the output terminal of sampling fifo module and time fifo module respectively input terminus with MCU data processing module be connected, the output terminal of MCU data processing module is connected with upper computer.
Above-mentioned, GPS receiver module is external gps antenna, receives gps satellite signal.
Above-mentioned, described frequency reference referrer module comprises constant temperature crystal oscillator.
Above-mentioned, the reference clock that described frequency reference referrer module produces is 10Mhz.
A kind of pavement disease detection high-precision signal synchronous collection method, adopts the above-mentioned pavement disease detection synchronous acquisition system of high-precision signal, and specific implementation comprises following steps:
Step 1.GPS module initialize also searches for gps satellite signal, exports GPS second pulse and GPS time service information, GPS time service information is transferred to MCU data processing module;
When step 2. frequency reference referrer module detects GPS second pulse, constant temperature crystal oscillator is phase-locked to this GPS second pulse, otherwise, constant temperature crystal oscillator free oscillations also exports sampling clock and reference clock;
Step 3. timing module is using clock of sampling as clock source, the size of the data frame according to user's setting arranges dividing ratio, produce the counting number of frame synchronization clock, when starting or reach the counting of a frame, output frame synchronous clock triggers sampling to A/D analog to digital conversion module, and the time information of frame head is outputted to time fifo module buffer memory, A/D analog to digital conversion module receives the sampling clock of frequency reference referrer module output and the frame synchronization clock of timing module output, the simulating signal of sensor is converted to high-speed digital signal, transfer to sampling fifo module and carry out buffer memory,
Step 4.MCU data processing module reads sampling fifo module and time fifo module, and the big young pathbreaker's data frame of data frame arranged according to user and the sampling clock of data frame carry out packing buffer memory, and output to upper computer and process.
In above-mentioned step 3, time fifo module stores the time information of each frame head.
Fifo module of sampling in above-mentioned step 3 stores the corresponding high-speed digital signal changed by the simulating signal of sensor.
In above-mentioned step 4, a data frame calculates the relative time corresponding to this point according to the counting number of the sampling clock obtained in step 3, when MCU data processing module starts sampling work, according to the GPS time service information obtained, each relative time in data frame is added that GPS time service information obtains the absolute time corresponding to this point.
The useful effect of the present invention:
1. each data frame that the present invention exports calculates the relative time corresponding to this point according to the clock count number of sampling, when MCU data processing module starts sampling work, according to the GPS time service information obtained, each relative time in data frame is added that GPS time service information obtains the absolute moment of this some correspondence, acquisition precision height, stable performance, it may also be useful to convenience, synchronous effect are good.
2. the present invention ensures the synchronous of data gathering moment, realize the accurate of time information corresponding to sampling instant, realize process is equivalent to each data to be all with and stab mark if having time, can be sent by interfaces such as networks, realize the close-coupled processing of asynchronous data transfer, distributed data acquisition system can be made equally to realize the asynchronous transmission process of sensing data, applied widely.
Accompanying drawing illustrates:
Fig. 1 is the pavement disease of the present invention detection synchronous acquisition system schematic diagram of high-precision signal;
Fig. 2 is the GPS module receiving circuit figure of the present invention;
Fig. 3 is pavement disease of the present invention detection high-precision signal synchronous collection method schematic flow sheet.
Embodiment:
Below in conjunction with accompanying drawing and technical scheme, the present invention is further detailed explanation, and by preferred embodiment, embodiments of the present invention is described in detail, but embodiments of the present invention are not limited to this.
Shown in Fig. 1 ~ 3, a kind of pavement disease detection synchronous acquisition system of high-precision signal, comprise GPS module, frequency reference referrer module, A/D analog to digital conversion module, simulating signal module, timing module, sampling fifo module, time fifo module and MCU data processing module, GPS module receives gps satellite signal by GPS receiver module, GPS module output terminal respectively with the connecting with signal of MCU data processing module and frequency reference referrer module, frequency reference referrer module output terminal and A/D analog to digital conversion module and timing module connect with signal, the simulating signal of A/D analog to digital conversion module receiving sensor, A/D analog to digital conversion module output terminal connects with signal with sampling fifo module, timing module output terminal is connected with time fifo module with A/D analog to digital conversion module respectively, the output terminal of sampling fifo module and time fifo module respectively input terminus with MCU data processing module be connected, the output terminal of MCU data processing module is connected with upper computer.
Above-mentioned, GPS receiver module is external gps antenna, receives the gps satellite signal in space, exports GPS second pulse and time service information, and GPS second pulse locks onto on the high precision clock of gps satellite.
Above-mentioned, described frequency reference referrer module comprises constant temperature crystal oscillator.
Above-mentioned, the reference clock that described frequency reference referrer module produces is 10Mhz.
A kind of pavement disease detection high-precision signal synchronous collection method, adopts the above-mentioned pavement disease detection synchronous acquisition system of high-precision signal, and specific implementation comprises following steps:
Step 1.GPS module initialize also searches for gps satellite signal, exports GPS second pulse and GPS time service information, GPS time service information is transferred to MCU data processing module;
When step 2. frequency reference referrer module detects GPS second pulse, constant temperature crystal oscillator is phase-locked to this GPS second pulse, otherwise, constant temperature crystal oscillator free oscillations also exports sampling clock and reference clock;
Step 3. timing module is using clock of sampling as clock source, the size of the data frame according to user's setting arranges dividing ratio, produce the counting number of frame synchronization clock, when starting or reach the counting of a frame, output frame synchronous clock triggers sampling to A/D analog to digital conversion module, and the time information of frame head is outputted to time fifo module buffer memory, A/D analog to digital conversion module receives the sampling clock of frequency reference referrer module output and the frame synchronization clock of timing module output, the simulating signal of sensor is converted to high-speed digital signal, transfer to sampling fifo module and carry out buffer memory,
Step 4.MCU data processing module reads sampling fifo module and time fifo module, and the big young pathbreaker's data frame of data frame arranged according to user and the sampling clock of data frame carry out packing buffer memory, and output in upper computer software and process.
In above-mentioned step 3, time fifo module stores the time information of each frame head.
Fifo module of sampling in above-mentioned step 3 stores the high-speed digital signal changed by the simulating signal of respective sensor.
In above-mentioned step 4, a data frame calculates the relative time corresponding to this point according to the counting number of the sampling clock obtained in step 3, when MCU data processing module starts sampling work, according to the GPS time service information obtained, each relative time in data frame is added that GPS time service information obtains the absolute time corresponding to this point.
In the present invention, MCU data processing module selects ST Microelectronics based on 32 8-digit microcontroller STM32f103rbt6 of Codex-M3 kernel, and select the NEO-5QGPS subminiature satellite receiver module of relatively low-power consumption, this chip is multi-functional independent type GPS module, framework based on ROM, cost is low, volume is little, can realize searching 32 satellite channels, can extract from the information received and export 2 kinds of time signals: one is pulse signal lPPS, and the synchronous error of its leading edge of impulse and universal time is no more than 1 �� s;Two is the time information exported through serial ports, provides between 1PPS pulse, is used for UTC time (year, month, day, hour, min, second) corresponding to a 1PPS pulse is described.
The present invention is not limited to above-mentioned embodiment, and those skilled in the art also can make multiple change accordingly, but any is equal to the present invention or similar change all should be encompassed in the scope of the claims in the present invention.
Claims (8)
1. the pavement disease detection synchronous acquisition system of high-precision signal, it is characterized in that: comprise GPS module, frequency reference referrer module, A/D analog to digital conversion module, simulating signal module, timing module, sampling fifo module, time fifo module and MCU data processing module, GPS module receives gps satellite signal by GPS receiver module, GPS module output terminal respectively with the connecting with signal of MCU data processing module and frequency reference referrer module, frequency reference referrer module output terminal and A/D analog to digital conversion module and timing module connect with signal, the simulating signal of A/D analog to digital conversion module receiving sensor, A/D analog to digital conversion module output terminal connects with signal with sampling fifo module, timing module output terminal is connected with time fifo module with A/D analog to digital conversion module respectively, the output terminal of sampling fifo module and time fifo module respectively input terminus with MCU data processing module be connected, the output terminal of MCU data processing module is connected with upper computer.
2. the pavement disease according to claim 1 detection synchronous acquisition system of high-precision signal, it is characterised in that: GPS receiver module is external gps antenna, receives gps satellite signal.
3. the pavement disease according to claim 1 detection synchronous acquisition system of high-precision signal, it is characterised in that: described frequency reference referrer module comprises constant temperature crystal oscillator.
4. the pavement disease according to claim 1 detection synchronous acquisition system of high-precision signal, it is characterised in that: the reference clock that described frequency reference referrer module produces is 10Mhz.
5. a pavement disease detection high-precision signal synchronous collection method, it is characterised in that: adopting the detection synchronous acquisition system of high-precision signal of the pavement disease described in the arbitrary item of claim 1 ~ 4, specific implementation comprises following steps:
Step 1.GPS module initialize also searches for gps satellite signal, exports GPS second pulse and GPS time service information, GPS time service information is transferred to MCU data processing module;
When step 2. frequency reference referrer module detects GPS second pulse, constant temperature crystal oscillator is phase-locked to this GPS second pulse, otherwise, constant temperature crystal oscillator free oscillations also exports sampling clock and reference clock;
Step 3. timing module is using clock of sampling as clock source, the size of the data frame according to user's setting arranges dividing ratio, produce the counting number of frame synchronization clock, when starting or reach the counting of a frame, output frame synchronous clock triggers sampling to A/D analog to digital conversion module, and the time information of frame head is outputted to time fifo module buffer memory, A/D analog to digital conversion module receives the sampling clock of frequency reference referrer module output and the frame synchronization clock of timing module output, the simulating signal of sensor is converted to high-speed digital signal, transfer to sampling fifo module and carry out buffer memory,
Step 4.MCU data processing module reads sampling fifo module and time fifo module, and the big young pathbreaker's data frame of data frame arranged according to user and the sampling clock of data frame carry out packing buffer memory, and output to upper computer and process.
6. pavement disease according to claim 5 detection high-precision signal synchronous collection method, it is characterised in that: in step 3, time fifo module stores the time information of each frame head.
7. pavement disease according to claim 5 detection high-precision signal synchronous collection method, it is characterised in that: fifo module of sampling in step 3 stores the corresponding high-speed digital signal changed by the simulating signal of sensor.
8. pavement disease according to claim 5 detection high-precision signal synchronous collection method, it is characterized in that: in step 4, a data frame calculates the relative time corresponding to this point according to the counting number of the sampling clock obtained in step 3, when MCU data processing module starts sampling work, according to the GPS time service information obtained, each relative time in data frame is added that GPS time service information obtains the absolute time corresponding to this point.
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| DE202012009335U1 (en) * | 2012-09-27 | 2012-12-11 | Moba Ag | Combined ultrasonic distance sensor and infrared temperature sensor |
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