CN109164973A - A kind of method and system of acquisition and assessment scan data - Google Patents

Abstract

The present application discloses a method and system for collecting and evaluating scan data. The method includes: setting a to-be-scanned area, obtaining pre-scanning time, pre-scanning file size and pre-scanning stroke of the to-be-scanned area; estimating the to-be-scanned area Estimated scanning time of the scanning area and estimated scanning file size; divide the area to be scanned according to the preset scanning area modification scheme to obtain the divided scanning area; scan the area to be scanned or the divided scanning area to obtain the X-axis, Y-axis and Z-axis scan data; scan the surface of the standard plate to obtain standard data for leveling, calculate the standard deviation of the standard data as the measurement accuracy of the scanner; calculate the standard deviation of the X-axis, Y-axis and Z-axis scan data, and the standard plate The roughness range of the scanner is compared to obtain the evaluation results of the scanner. The invention can realize the precise control of the scanning process and the efficient processing of the collected data, thereby improving the accuracy and stability of the scanner.

Description

A method and system for collecting and evaluating scan data

technical field

The present invention relates to the technical field of processing scan data, and more particularly, to a method and system for collecting and evaluating scan data.

Background technique

Most of the fault displacement of the earthquake occurs on the main slip plane of the fault zone. The accurate description of the natural fault topography is of great significance to the research of fault rupture properties and fault mechanics. In the quantitative research of the fault plane topography, high resolution is required. , High-precision topography measurement equipment for measurement, 3D laser scanners are often used as white light interferometers. This scanner has a limited single scan frame, about 15cm*15cm, with a maximum resolution of about 20 microns, relying on white light. Interference, blank areas of the scan often appear where the surface is recessed. The newly developed indoor laser measuring instrument (application number: 20120098150.1) and similar inventions solve the above problems well, but there are still some deficiencies.

These deficiencies are mainly manifested in the following aspects: First, there is no pre-scan setting, and there is no pre-scanning process set on the existing laser scanner, which causes the scanning point to exceed the scanning point frequently during the scanning process. Invalid point value caused by the sensing range of the laser displacement sensor of the scanner; or the scanning time is too long and the single scanned file is too large, forcing the scanner to interrupt the scanning, and the scanning range or scanning operation parameters need to be re-modified and then performed again. The scanning operation reduces the scanning efficiency; second, the data storage format is unreasonable. The predecessor 3D laser scanner stores the scanned data as the values in the X-axis direction, the Y-axis direction and the Z-axis direction. This kind of storage data The method does not allow the user to easily retrieve a certain profile information, nor does it allow the user to quickly obtain the point interval in the X and Y directions of the scan result, which brings great inconvenience to the user to retrieve and use the data. , which is not conducive to the efficient processing and utilization of data; third, the lack of measurement of the measurement accuracy of the scanner itself, the measurement accuracy of the scanner in the Z-axis direction and the measurement accuracy of the interval between the X-axis and the Y-axis in the horizontal direction is to scan For the premise of data use, no solution is given in similar inventions; finally, after scanning the topographic surface, no results such as fractal dimension values that can show the roughness of the topographic surface are given.

Therefore, it is an urgent technical problem to be solved in the art to provide a solution for scanning data acquisition and evaluation with high precision and strong stability.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a method and system for collecting and evaluating scan data, which solves the technical problems of low accuracy, low stability and complicated operation of collecting scan data in the prior art.

In order to solve the above-mentioned technical problems, the present invention proposes a method for collecting and evaluating scan data, including:

Setting the area to be scanned, and controlling the scanner to perform pre-scanning along the peripheral line of the area to be scanned, to obtain the pre-scanning time, the file size of the pre-scanning and the stroke of the pre-scanning of the peripheral line of the area to be scanned;

According to the pre-scanning time, the pre-scanning file size and the size of the area to be scanned, the estimated scanning time and the estimated scanning file size of the to-be-scanned area are estimated; when the estimated scanning time reaches or exceeds the preset and/or the estimated scan file size reaches or exceeds the preset scan file size threshold; and/or when the pre-scanning stroke reaches or exceeds the preset range threshold, modify the scan area according to the preset The scheme divides the to-be-scanned area to obtain a divided scanning area;

Scanning the to-be-scanned area or the divided scan area to obtain X-axis, Y-axis and Z-axis scan data of the scan area;

Scan the surface of the standard plate to obtain standard data, level the standard data, calculate the standard deviation of the standard data, and use the standard deviation of the standard data as the measurement accuracy of the scanner;

After calculating the standard deviation of the X-axis, Y-axis and Z-axis scanning data respectively, and comparing with the roughness range of the standard plate, the scanner evaluation result is obtained, and the measurement accuracy and evaluation result are displayed.

Optionally, wherein, the method further includes:

The X-axis, Y-axis and Z-axis scanning data of the scanning area are obtained, and are stored in their respective preset data formats according to the recorded scanning parameters, the data of each survey line and the data of the recorded survey points.

Optionally, wherein, the estimated scan time reaches or exceeds a preset scan time threshold, and/or the estimated scan file size reaches or exceeds a preset scan file size threshold; and/or the predetermined scan file size When the scanning stroke reaches or exceeds the preset range threshold, the to-be-scanned area is divided according to the preset scanning area modification scheme to obtain the divided scanning area, which is:

When the estimated scan time reaches or exceeds the preset scan time threshold, and/or the estimated scan file size reaches or exceeds the preset scan file size threshold; and/or the pre-scanning stroke reaches or exceeds the preset When the range threshold is reached, the scan is paused and the estimated scan time, pre-scan travel and estimated scan file size are displayed.

Optionally, wherein, in the setting of the to-be-scanned area, pre-scan is performed along the peripheral line of the to-be-scanned area to obtain the pre-scanned time, pre-scanned file size and pre-scanned stroke of the to-be-scanned area ,for:

When the scanning point of the scanner reaches the measurement point in the target area and receives the setting instruction, the measurement point is taken as the corner point of the area to be scanned, and when four corner points are detected continuously, the corner points will be connected The obtained area is used as the area to be scanned;

Pre-scanning is performed along the peripheral line of the to-be-scanned area to obtain the pre-scanned time, pre-scanned file size and pre-scanned stroke of the to-be-scanned area.

Optionally, the surface roughness of the standard plate is 2um-5um.

In another aspect, the present invention also provides a system for collecting and evaluating scan data, comprising: a computer platform, a controller and an analog-to-digital converter, wherein the controller is connected to the computer platform for controlling the The instructions are converted into scanner instructions and output to the scanner; the analog-to-digital converter is connected to the computer platform for receiving the analog signal of the scanner, converting it into a digital signal and sending it to the scanner a computer platform; the computer platform is connected with a controller and an analog-to-digital converter, and is used for transmitting communication signals with the controller and the analog-to-digital converter;

The computer platform includes: a pre-scanner, a scan adjuster, a scanner, a standard plate setter and a scan evaluator; wherein,

The pre-scanner is connected to the scan adjuster, and is used to set the area to be scanned, and to control the scanner to perform pre-scan along the peripheral line of the area to be scanned to obtain a pre-scan of the peripheral line of the area to be scanned. Scanning time, pre-scanning file size and pre-scanning itinerary;

The scan adjuster is connected with the pre-scanner and the scanner, and is used to estimate the estimated scan of the to-be-scanned area according to the pre-scanned time, the pre-scanned file size and the size of the to-be-scanned area time and estimated scan file size; when the estimated scan time reaches or exceeds the preset scan time threshold, and/or the estimated scan file size reaches or exceeds the preset scan file size threshold; and/or the When the scanning stroke reaches or exceeds the preset range threshold, divide the to-be-scanned area according to the preset scanning area modification scheme to obtain the divided scanning area;

The scanner is connected with the scanning adjuster and the standard plate setting device, and is used to scan the to-be-scanned area or the divided scanning area to obtain the X-axis, Y-axis and Z-axis scan data of the scanning area;

The standard plate setting device is connected with the scanner and the scanning evaluator, and is used for scanning the surface of the standard plate to obtain standard data, leveling the standard data, and calculating the standard of the standard data variance, taking the standard variance of the standard data as the measurement accuracy of the scanner;

The scan evaluator is connected to the standard plate setting device, and after calculating the standard deviation of the X-axis, Y-axis and Z-axis scan data respectively, and comparing with the roughness range of the standard plate to obtain the scan The instrument evaluation results are displayed, and the measurement accuracy and evaluation results are displayed.

Optionally, wherein, the system further includes: a scanning memory, connected with the scanner and the standard plate setter, for obtaining the X-axis, Y-axis and Z-axis scanning data of the scanning area, according to the recorded scanning parameters , The data of each survey line and the data of recorded survey points are stored in their respective preset data formats.

Optionally, wherein, the scan adjuster includes: a scan pre-evaluation unit and a scan control unit;

The scanning pre-evaluation unit is connected with the pre-scanner and the scanning control unit, and is used to estimate the pre-scanning area of the to-be-scanned area according to the pre-scanned time, the pre-scanned file size and the size of the area to be scanned. Estimate scan time and estimated scan file size;

The scan control unit is connected with the scan pre-evaluation unit and the scanner, and reaches or exceeds the preset scan time threshold at the estimated scan time, and/or the estimated scan file size reaches or exceeds the preset scan time threshold. Scanning file size threshold; and/or when the pre-scanning stroke reaches or exceeds the preset range threshold, suspend scanning and display the estimated scanning time, pre-scanning stroke and estimated scanning file size; Adjust parameters of the scan area and adjust the scan area.

Optionally, the pre-scanner includes: a to-be-scanned area setting unit and a pre-scan parameter acquisition unit; the to-be-scanned area setting unit is connected to the pre-scan parameter acquisition unit for scanning When the scanning point of the scanner reaches the measurement point in the target area and receives the setting instruction, the measurement point is regarded as the corner point of the area to be scanned. area as the area to be scanned;

The pre-scan parameter acquisition unit is connected with the to-be-scanned area setting unit and the scan adjuster, and is used for pre-scanning along the peripheral line of the to-be-scanned area to obtain the pre-scanned area of the to-be-scanned area. time, pre-scanned file size and pre-scanned itinerary.

Optionally, the surface roughness of the standard plate is 2um-5um.

Compared with the prior art, the method and system for collecting and evaluating scan data provided by the present invention achieve at least one of the following beneficial effects:

(1) The method and system for collecting and evaluating scan data of the present invention are provided with a pre-scan function, which can perform pre-scan on the peripheral line of the scanning area at the front of the formal scan, and estimate the scan time, the size of the scanned file, and the presence or absence of the scan data. Information such as the scanning point exceeding the range helps the operator to know the possible unreasonableness of the scan before the official scan, thereby helping the operator to modify the spatial position of the scanned object and modify the scanning parameters to a reasonable range, thus ensuring that The accuracy and stability of the collected scan data improves the success rate of the scan.

(2) The method and system for collecting and evaluating scanned data according to the present invention can not only evaluate the accuracy of the elevation data of the sampling results of the scanner, but also evaluate the accuracy of the point interval distribution in the X and Y axis directions, thereby Accurately detecting the accuracy of the scanner is beneficial for the user to better use the scanner to obtain accurate scanning results.

(3) The method and system for collecting and evaluating scanned data according to the present invention receives the three-dimensional coordinate information obtained by scanning, converts the received analog signal of the three-dimensional coordinate information into a digital signal, and transmits it to the storage module, and the survey line The data of the measuring point is stored in a specific format, and the storage module specifies a specific data storage format, which is beneficial to improve the efficiency of scanning data reading and processing.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is a schematic flowchart of the steps of the method for collecting and evaluating scan data described in the embodiment of the present invention;

2 is a schematic flowchart of another method for collecting and evaluating scan data according to an embodiment of the present invention;

3 is a schematic flowchart of another method for collecting and evaluating scan data according to an embodiment of the present invention;

4 is a schematic flowchart of another method for collecting and evaluating scan data according to an embodiment of the present invention;

5 is a schematic structural diagram of a system for collecting and evaluating scan data according to an embodiment of the present invention;

6 is a schematic structural diagram of a computer platform in another system for collecting and evaluating scan data according to an embodiment of the present invention;

7 is a schematic structural diagram of a computer platform in another system for collecting and evaluating scan data according to an embodiment of the present invention;

8 is a schematic structural diagram of a computer platform in another system for collecting and evaluating scan data according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a computer platform in another system for collecting and evaluating scan data according to an embodiment of the present invention.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related application, but not to limit the application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings.

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in FIG. 1 , a schematic flowchart of the steps of the method for collecting and evaluating scan data according to this embodiment, the method includes the following steps:

Step 101: Set the area to be scanned, control the scanner to pre-scan along the peripheral line of the area to be scanned, and obtain the pre-scan time, pre-scanned file size and pre-scan stroke of the peripheral line of the to-be-scanned area.

The peripheral edge of the pre-scan area can be scanned through motion scanning to obtain pre-scan data. Combined with the movement speed and step size in the XY direction, it can be used to pre-calculate the time used for this formal scan, the amount of data and whether there is out-of-range data. to complete the prescan process.

Step 102, estimate the estimated scan time and the estimated scan file size of the area to be scanned according to the pre-scan time, the pre-scanned file size and the size of the area to be scanned; when the estimated scan time reaches or exceeds the preset scan time The threshold value, and/or the estimated scanning file size reaches or exceeds the preset scanning file size threshold; and/or when the pre-scanning stroke reaches or exceeds the preset range threshold, the area to be scanned is divided according to the preset scanning area modification scheme Get the segmented scan area.

Although the current scanner controller can also specify the scanning area to complete the scanning, in the scanning process, it is often found that the scanning point exceeds the range (such as obtaining invalid points), the scanning time is too long, and the single scanned file is too large, which makes the operation The user has to interrupt the scan and re-modify the parameters to scan again. The scanning data acquisition system of this embodiment provides a pre-scan function, which can estimate the scanning time, the size of the scanned file, and whether the scanning point exceeds the range by pre-scanning along the peripheral line of the scanning area before the official scanning. This information helps the operator to know the possible unreasonableness of this scan before the official scan, so as to help the operator to further modify the spatial position of the scanned object, and to modify the scan parameters to a reasonable range to improve the success rate of the scan.

There are three main functions of Pre-Scan: first, to check whether the vertical Z-axis value of the scanning target area exceeds the range of the laser measurement sensor; second, to estimate the movement speed of the X-axis and the Y-axis The scanning time under the interval; thirdly, estimate the size of the scanning data file to provide a basis for the operator to make further decisions. Optionally, an emergency event function can be set. In the pre-scan, if the fluctuation of the surface exceeds the range of the laser measurement sensor, there will be a display, and then the operator can adjust the spatial position of the object to eliminate the over-range reminder. At the same time, during the scanning process, you can click the Pause Scanning button to pause scanning.

Step 103: Scan the to-be-scanned area or the divided scan area to obtain X-axis, Y-axis and Z-axis scan data of the scan area.

According to the three-dimensional coordinate information, the undulating shape of the surface of the object can be obtained, so the three-dimensional coordinate information obtained by scanning is the target data we want to obtain, which needs to be stored and evaluated.

Step 104: Scan the surface of the standard plate to obtain standard data, level the standard data, calculate the standard deviation of the standard data, and use the standard deviation of the standard data as the measurement accuracy of the scanner. Optionally, the surface roughness of the standard board is 2um-5um. To level the standard data, you can first perform the trend surface fitting operation on the standard data of the standard plate, level the trend surface to the position of the standard horizontal surface, and use the leveling parameters of the fitting surface to level the standard data, and then you can Accuracy calculation is performed on the leveled data to obtain the measurement accuracy of the scanner.

For the evaluation of elevation data in the vertical direction, a slate of standard roughness can be used as the measured standard plate, and the scanner can be used to scan it. First, fit the trend surface to the data, and then perform leveling according to the trend surface to obtain the result data. Average the Y-axis values of each row in the result data, and find the standard deviation of the row interval of the Y value as the precision value in the Y-axis direction; select a row of X-axis data, find the point interval of the X-axis, and find the data set The standard deviation is used as the accuracy in the X-axis direction; the corresponding Z-axis numerical data set is selected, and the standard deviation of the Z-axis data values is used as the scanner's Z-axis accuracy.

Step 105: After calculating the standard deviation of the X-axis, Y-axis and Z-axis scanning data respectively, compare with the roughness range of the standard plate to obtain the scanner evaluation result, and show the measurement accuracy and the evaluation result. Optionally, each standard plate has its preset accuracy range. If the evaluation result of the scanner is within 1-3 times of the roughness range of the standard plate, it means that the scanner is at a normal usable level; if it exceeds 3 times, it means that the accuracy of the scanner itself is too low.

In this embodiment, the main operation flow may include: setting the range of the area to be scanned, and determining the coordinates of the four vertices of the area to be scanned; setting scanning operation parameters, inputting the line spacing and scanning operation speed; along the periphery of the area to be scanned Perform pre-scanning to obtain the expected time to be scanned, the size of the pre-scanned file and the number of points that exceed the range; obtain the pre-scanning result, estimate that the scanning time reaches or exceeds the preset scanning time threshold, and/or the estimated scanning file size reaches or exceeds the preset scan file size threshold; and/or when the pre-scanning stroke reaches or exceeds the preset range threshold, the estimated scanning time, the pre-scanning stroke and the estimated scanning file size are displayed; Prompt the operator to modify the scan range and scan operation parameters; scan the standard plate; store the scan result data according to the preset data format; perform leveling trend surface processing on the result data, and calculate the vertical measurement accuracy of the scanner with level measurement accuracy.

Although the current scanner software can also specify the scanning area to complete the scanning, in the scanning process, it is often found that the scanning point exceeds the range (such as obtaining invalid points), the scanning time is too long, and the single scanning file is too large, which makes the operator The scan has to be interrupted, and the parameters are re-modified to perform the scan operation again. The scanning data acquisition system of this embodiment provides a pre-scan function, which can estimate the scanning time, the size of the scanned file, and whether the scanning point exceeds the range by pre-scanning along the peripheral line of the scanning area before the official scanning. This information helps the operator to know the possible unreasonableness of this scan before the official scan, so as to help the operator to further modify the spatial position of the scanned object, and to modify the scan parameters to a reasonable range to improve the success rate of the scan.

Optionally, the pre-scan mainly includes the following processes: pre-scan evaluation, pre-scan is performed along the periphery of the area to be scanned, to obtain the expected time to be scanned, the size of the pre-scanned file and the number of points exceeding the range; The estimated scan time reaches or exceeds the preset scan time threshold, and/or the estimated scan file size reaches or exceeds the preset scan file size threshold; and/or when the pre-scanning stroke reaches or exceeds the preset range threshold , displaying the estimated scanning time, the pre-scanning itinerary and the estimated scanning file size; dividing the to-be-scanned area according to the preset scanning area modification scheme to obtain a divided scanning area.

There are three main functions of Pre-Scan: first, check whether the vertical Z-axis value of the scanning target area exceeds the range of the laser measurement sensor; second, estimate the scanning time required in the area to be scanned; Third, estimate the size of the scanned data file to provide a basis for the operator to make further decisions. Optionally, an emergency event function can be set. In the pre-scan, if the fluctuation of the surface exceeds the range of the laser measurement sensor, there will be a display, and then the operator can adjust the spatial position of the object to eliminate the over-range reminder. At the same time, during the scanning process, you can click the Pause Scanning button to pause scanning.

Optionally, the formal scanning mainly includes the following processes: scanning the topography surface; storing the scan result data according to a preset data format; performing leveling trend surface processing on the result data, and calculating the fractal dimension value of the result as the shape. Surface roughness distribution.

Optionally, the steps of this implementation method may further include: a step of calculating the roughness of the topographic surface, as follows: scanning the topographic surface; storing the scanned data according to a preset data format; The measurement data is obtained by scanning, and the roughness of the topographic surface is calculated.

Specifically, a morphological surface with undulating surface is used as the object to be measured, a trend surface is fitted to the obtained measurement data, and then leveling is performed according to the trend surface. Then, use the interpolation method to interpolate the result data to obtain the digital elevation model (DEM). Based on the DEM, the fractal dimension distribution of the DEM is obtained by using the method of the element fractal dimension model and the variogram to show the roughness of the topographic surface. degree distribution.

As shown in FIG. 2 , a schematic flow chart of the steps of another method for collecting and evaluating scan data described in this embodiment is different from that in FIG. 1 , the method further includes the following steps:

Step 201: Obtain the X-axis, Y-axis and Z-axis scanning data of the scanning area.

Step 202 , according to the recorded scanning parameters, the data of each survey line, and the data of the recorded survey points, respectively, are stored in respective preset data formats.

The current data storage method is to directly store the data as three values of X-axis, Y-axis and Z-axis scan data. This method of storing data brings a lot of inconvenience to the user and cannot be arbitrarily retrieved by the user. The information of a certain section does not allow the user to know the X interval and Y interval of the point cloud. In this embodiment, the data storage format is further divided into several partial files: record scanning parameter part (for example, suffix name.inf), data information of each survey line (for example, suffix name.rcd) and record data of measuring points file (eg, suffix .dat). The construction of the storage structure of these data in different storage formats is conducive to the user's quick reading, retrieval and use of the data, such as the retrieval of each row of sections and the cutting of the data, which further facilitates the user's use.

At present, the data storage method is to directly store the data as three values of X-axis, Y-axis and Z-axis scan data. This method of storing data brings a lot of inconvenience to the user and cannot be arbitrarily retrieved by the user. The information of a certain section does not allow the user to know the X interval and Y interval of the point cloud. In this embodiment, the data storage format is further divided into several partial files: record scanning parameter part (for example, suffix name.inf), data information of each survey line (for example, suffix name.rcd) and record data of measuring points file (eg, suffix .dat).

(1) Record the scan parameter file (suffix .inf)

File data format: text file, ASCII I; default definition: the moving direction of the laser head is the X axis, and the line wrapping direction is the Y axis;

(2) Record the data information of each survey line (suffix name .rcd)

In order to easily extract the data of each survey line from the file, save each survey line in the file Store the survey line number, starting point position, and number of data points in the data file

(3) Record the data file of the measuring point (suffix .dat)

File data type: binary. This file records the spatial coordinates (x, y and z values) of each survey point and the survey line pass number.

attribute domain name field name type of data illustrate x coordinate xCoord floating point 64-bit, double x coordinate y coordinate yCoord float 64-bit, double y coordinate z coordinate zCoord floating point 64-bit, double z coordinate Line number LineNum floating point 64-bit, double Line number

The construction of the storage structures of these data in different storage formats is conducive to the user's rapid reading, retrieval and use of the data, such as: cutting the data and accessing each row of sections.

Optionally, in order to facilitate extracting the data of each survey line from the file, each survey line is saved in the file, and the survey line number, the position of the starting point, and the number of data points are stored in the data file. This file records the spatial coordinates (values of X, Y and Z axes) and survey line number of each measurement point.

As shown in FIG. 3 , a schematic flowchart of steps of another method for collecting and evaluating scan data according to the present embodiment is different from that in FIG. 1 , step 102 is:

Step 301 , estimating the estimated scanning time and the estimated scanning file size of the to-be-scanned area according to the pre-scanned time, the pre-scanned file size, and the to-be-scanned area size.

Step 302, the estimated scan time reaches or exceeds the preset scan time threshold, and/or the estimated scan file size reaches or exceeds the preset scan file size threshold; and/or the pre-scanning stroke reaches or exceeds the preset scan file size threshold; When the range threshold is reached, the scan will be paused and the estimated scan time, pre-scan travel and estimated scan file size will be displayed.

As shown in FIG. 4 , a schematic flowchart of the steps of another method for collecting and evaluating scan data according to the present embodiment is different from that in FIG. 1 , in that step 101 is:

Step 401: When the scanning point of the scanner reaches the measurement point in the target area and receives the setting instruction, the measurement point is used as the corner point of the area to be scanned, and when four corner points are detected continuously, the connected corner points are obtained. area as the area to be scanned.

Step 402: Perform pre-scanning along the peripheral line of the area to be scanned to obtain the pre-scanning time, the pre-scanning file size and the pre-scanning stroke of the to-be-scanned area.

As shown in FIG. 5 , a schematic structural diagram of a system 500 for collecting and evaluating scan data provided in this embodiment is used to implement the above-mentioned method for collecting and evaluating scan data. The system includes: a computer platform 500, A controller 5001 and an analog-to-digital converter 5002, wherein the controller is connected to the computer platform for converting control instructions into scanner instructions and outputting them to the scanner; the analog-to-digital converter, connected with the computer platform for receiving the analog signal of the scanner, converting it into a digital signal and sending it to the computer platform; the computer platform is connected with the controller and the analog-to-digital converter for connecting with the Transmission of communication signals between the controller and the analog-to-digital converter;

The computer platform includes: a pre-scanner 501 , a scan adjuster 502 , a scanner 503 , a standard plate setter 504 and a scan evaluator 505 .

The pre-scanner 501 is connected to the scan adjuster 502 and is used to set the area to be scanned, and to control the scanner to perform pre-scan along the peripheral line of the area to be scanned to obtain the peripheral line of the area to be scanned Pre-scan time, pre-scan file size and pre-scan stroke.

The scan adjuster 502 is connected with the pre-scanner 501 and the scanner 503, and is used to estimate the estimated scan time and the estimated scan of the to-be-scanned area according to the pre-scan time, the pre-scanned file size and the size of the to-be-scanned area file size; the estimated scan time reaches or exceeds the preset scan time threshold, and/or the estimated scan file size reaches or exceeds the preset scan file size threshold; and/or the pre-scan travel reaches or exceeds the preset scan file size When the range threshold is set, the to-be-scanned area is divided according to the preset scanning area modification scheme to obtain the divided scanning area.

The scanner 503 is connected with the scan adjuster 502 and the standard plate setter 504, and is used for scanning the to-be-scanned area or the divided scan area to obtain X-axis, Y-axis and Z-axis scan data of the scan area.

The standard plate setting device 504, connected with the scanner 503 and the scanning evaluator 505, is used for scanning the surface of the standard plate to obtain standard data, leveling the standard data, and calculating the standard deviation of the standard data , the standard deviation of the standard data is taken as the measurement accuracy of the scanner. Optionally, the surface roughness of the standard plate is 2um-5um.

The scanning evaluator 505 is connected to the standard plate setting device 504, after calculating the standard deviation of the X-axis, Y-axis and Z-axis scanning data respectively, and comparing with the roughness range of the standard plate to obtain the evaluation result of the scanner and showing the measurement accuracy and evaluation results.

Optionally, the computer platform may include: a parameter setter.

The parameter setter includes a scan range setting unit and a scan operation parameter setting unit, the scan range setting unit is used to specify the specific position and range of the area to be scanned, and the scan operation parameter setting unit is used to set the scan Running line spacing and measuring running speed, as well as acceleration modes, including: maximum acceleration mode and gradient acceleration mode.

As shown in FIG. 6 , it is a schematic structural diagram of a computer platform 600 in another system for collecting and evaluating scan data provided in this embodiment. What is different from FIG. 5 is that the system further includes: a scan memory 601 , and a scan memory 601 . The device 503 is connected with the standard plate setting device 504, and is used to obtain the X-axis, Y-axis and Z-axis scanning data of the scanning area according to the recorded scanning parameters, the data of each measuring line and the data of the recorded measuring points. Preset data format for storage.

As shown in FIG. 7 , a schematic structural diagram of a computer platform 700 in another system for collecting and evaluating scan data provided in this embodiment is different from that in FIG. 5 , the scan adjuster 502 includes: An evaluation unit 521 and a scan control unit 522; the pre-scan evaluation unit 521 is connected to the pre-scanner 501, obtains the to-be-scanned range and scan operation parameters, issues a scan operation command through the controller, and converts the The scanning data result received by the scanner, carry out scanning pre-evaluation to the to-be-scanned area, obtain the pre-scanning time, the pre-scanned file size and whether the elevation value exceeds the range; the scanning control unit 522, and the scanning pre-evaluation unit 521 is connected to the scanner 503, and the estimated scan time reaches or exceeds the preset scan time threshold, and/or the estimated scan file size reaches or exceeds the preset scan file size threshold; and/or the preset scan time threshold When the scanning stroke reaches or exceeds the preset range threshold, the estimated scanning time, the pre-scanning stroke and the estimated scanning file size are displayed; the operator is prompted to modify the scanning range and scanning operation parameters, or follow the preset The scanning area modification scheme divides the to-be-scanned area to obtain a divided scanning area, and then issues a formal scanning instruction through the controller.

As shown in FIG. 8 , a schematic structural diagram of a computer platform 800 in another system for collecting and evaluating scan data provided in this embodiment is different from FIG. 5 in that the pre-scanner 501 includes: a to-be-scanned device The area setting unit 511 and the pre-scanning parameter obtaining unit 512; wherein, the area setting unit 511 to be scanned is connected with the pre-scanning parameter obtaining unit 512, and is used for the scanning point of the scanner to reach the measurement point in the target area and When the setting instruction is received, the measurement point is used as the corner point of the area to be scanned, and when four corner points are detected continuously, the area obtained by connecting the corner points is used as the area to be scanned.

The pre-scanning parameter acquisition unit 512 is connected to the area to be scanned setting unit 511 and the scan adjuster 502, and is used for pre-scanning along the peripheral line of the area to be scanned to obtain the pre-scanning time of the area to be scanned, the pre-scanning value of the pre-scanning area. File size and prescan stroke.

Optionally, as shown in FIG. 9 , different from FIG. 6 , the computer platform may further include: and a roughness calculator 901 . The roughness calculator 901 is connected to the scanning memory 601, acquires the scan data results of the common fault plane, performs the leveling trend plane processing, performs roughness calculation on the common roughness scan plane results, and outputs the results. Specifically, a morphological surface with undulating surface is used as the object to be measured, a trend surface is fitted to the obtained scan data, and then leveling is performed according to the trend surface to obtain the leveled result data. Then, use the interpolation method to interpolate the result data to obtain a digital elevation model (DEM). Based on the DEM, the fractal dimension distribution of the DEM is obtained by using the method of the element fractal dimension model and the variogram to show the roughness of the topographic surface. degree distribution.

It can be seen from the above embodiments that the method and system for collecting and evaluating scan data of the present invention achieve the following beneficial effects:

(1) The method and system for collecting and evaluating scan data of the present invention are provided with a pre-scan function, which can perform pre-scan on the peripheral line of the scanning area at the front of the formal scan, and estimate the scan time, the size of the scanned file, and the presence or absence of the scan data. Information such as the scanning point exceeding the range helps the operator to know the possible unreasonableness of the scan before the official scan, thereby helping the operator to modify the spatial position of the scanned object and modify the scanning parameters to a reasonable range, thus ensuring that The accuracy and stability of the collected scan data improves the success rate of the scan.

(2) The method and system for collecting and evaluating scan data according to the present invention can not only evaluate the accuracy of the elevation data of the sampling result, but also evaluate the accuracy of the point interval distribution in the X and Y axis directions, so as to accurately detect The accuracy of the scanner can be obtained, which is beneficial for the user to better use the scanner to obtain accurate scanning results.

(3) The method and system for collecting and evaluating scanned data according to the present invention receives the three-dimensional coordinate information obtained by scanning, converts the received analog signal of the three-dimensional coordinate information into a digital signal, and transmits it to the storage module, and the survey line The data of the measuring point is stored in a specific format, and the storage module specifies a specific data storage format, which is beneficial to improve the efficiency of scanning data reading and processing.

Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are provided for illustration only and not for the purpose of limiting the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. A method of acquiring and evaluating scan data, comprising:

setting a to-be-scanned area, and controlling a scanner to perform pre-scanning along a peripheral line of the to-be-scanned area to obtain pre-scanning time, pre-scanning file size and pre-scanning stroke of the peripheral line of the to-be-scanned area;

estimating the estimated scanning time and the estimated size of the scanning file of the area to be scanned according to the pre-scanning time, the pre-scanning file size and the area to be scanned; when the estimated scanning time reaches or exceeds a preset scanning time threshold value, and/or the estimated scanning file size reaches or exceeds a preset scanning file size threshold value; and/or when the pre-scanning travel reaches or exceeds a preset range threshold, the area to be scanned is segmented according to a preset scanning area modification scheme to obtain a segmented scanning area;

scanning the area to be scanned or the divided scanning area to obtain X-axis, Y-axis and Z-axis scanning data of the scanning area;

scanning the surface of a standard plate to obtain standard data, leveling the standard data, calculating the standard variance of the standard data, and taking the standard variance of the standard data as the measurement accuracy of the scanner;

and respectively calculating the standard deviation of the X-axis scanning data, the Y-axis scanning data and the Z-axis scanning data, comparing the standard deviation with the roughness range of the standard plate to obtain an evaluation result of the scanner, and displaying the measurement precision and the evaluation result.

2. The method of acquiring and evaluating scan data of claim 1, further comprising:

and obtaining X-axis, Y-axis and Z-axis scanning data of the scanning area, and respectively storing the X-axis, Y-axis and Z-axis scanning data in respective preset data formats according to the recorded scanning parameters, the data of each measuring line and the data of the recorded measuring points.

3. The method of claim 1, wherein the estimated scan time reaches or exceeds a predetermined scan time threshold and/or the estimated scan file size reaches or exceeds a predetermined scan file size threshold; and/or when the pre-scanning travel reaches or exceeds a preset range threshold, the area to be scanned is segmented according to a preset scanning area modification scheme to obtain a segmented scanning area, wherein the segmented scanning area comprises the following steps:

when the estimated scanning time reaches or exceeds a preset scanning time threshold value, and/or the estimated scanning file size reaches or exceeds a preset scanning file size threshold value; and/or when the pre-scanning travel reaches or exceeds a preset range threshold, suspending scanning and displaying the estimated scanning time, the pre-scanning travel and the estimated scanning file size.

4. The method according to claim 1, wherein the setting of the area to be scanned, and the pre-scanning along the peripheral line of the area to be scanned, the pre-scanning time, the pre-scanning file size and the pre-scanning stroke of the area to be scanned are obtained as follows:

when a scanning point of a scanner reaches a measuring point in a target area and receives a set instruction, taking the measuring point as an angular point of an area to be scanned, and when four angular points are continuously detected, taking an area obtained by connecting the angular points as the area to be scanned;

and pre-scanning along the peripheral line of the area to be scanned to obtain the pre-scanning time, the pre-scanning file size and the pre-scanning stroke of the area to be scanned.

5. The method of collecting and evaluating scan data according to any of claims 1 to 4, wherein the standard plate has a surface roughness of 2um-5 um.

6. A system for acquiring and evaluating scan data, comprising: the system comprises a computer platform, a controller and an analog-to-digital converter, wherein the controller is connected with the computer platform and used for converting a control instruction into a scanner instruction and outputting the scanner instruction to the scanner; the analog-to-digital converter is connected with the computer platform and used for receiving the analog signal of the scanner, converting the analog signal into a digital signal and transmitting the digital signal to the computer platform; the computer platform is connected with the controller and the analog-to-digital converter and is used for transmitting communication signals between the computer platform and the controller and between the computer platform and the analog-to-digital converter;

the computer platform includes: the system comprises a pre-scanner, a scanning regulator, a scanner, a standard plate setter and a scanning evaluator; wherein,

the pre-scanner is connected with the scanning regulator and is used for setting a to-be-scanned area and controlling the scanner to perform pre-scanning along the peripheral line of the to-be-scanned area to obtain the pre-scanning time, the pre-scanning file size and the pre-scanning stroke of the peripheral line of the to-be-scanned area;

the scanning adjuster is connected with the pre-scanner and the scanner and used for estimating the estimated scanning time of the area to be scanned and the estimated size of the scanning file according to the pre-scanning time, the size of the file to be scanned and the size of the area to be scanned; when the estimated scanning time reaches or exceeds a preset scanning time threshold value, and/or the estimated scanning file size reaches or exceeds a preset scanning file size threshold value; and/or when the pre-scanning travel reaches or exceeds a preset range threshold, the area to be scanned is segmented according to a preset scanning area modification scheme to obtain a segmented scanning area;

the scanner is connected with the scanning adjuster and the standard plate setter and is used for scanning the area to be scanned or the divided scanning area to obtain X-axis, Y-axis and Z-axis scanning data of the scanning area;

the standard plate setter is connected with the scanner and the scanning evaluator and used for scanning the surface of a standard plate to obtain standard data, leveling the standard data, calculating the standard variance of the standard data and taking the standard variance of the standard data as the measurement precision of the scanner;

and the scanning evaluator is connected with the standard plate setter, respectively calculates the standard variance of the X-axis scanning data, the Y-axis scanning data and the Z-axis scanning data, compares the standard variance with the roughness range of the standard plate to obtain an evaluation result of the scanner, and displays the measurement precision and the evaluation result.

7. The system for acquiring and evaluating scan data according to claim 6, further comprising: and the scanning memory is connected with the scanner and the standard plate setter and is used for storing the X-axis scanning data, the Y-axis scanning data and the Z-axis scanning data of the obtained scanning area by adopting respective preset data formats according to the recorded scanning parameters, the data of each measuring line and the data of the recorded measuring points.

8. The system for acquiring and evaluating scan data according to claim 6, wherein said scan adjuster comprises: a scanning pre-evaluation unit and a scanning control unit;

the scanning pre-evaluation unit is connected with the pre-scanner and the scanning control unit and used for predicting the predicted scanning time and the predicted scanning file size of the area to be scanned according to the pre-scanning time, the pre-scanned file size and the area to be scanned;

the scanning control unit is connected with the scanning pre-evaluation unit and the scanner, and the estimated scanning time reaches or exceeds a preset scanning time threshold value, and/or the estimated scanning file size reaches or exceeds a preset scanning file size threshold value; and/or when the pre-scanning travel reaches or exceeds a preset range threshold, suspending scanning and displaying the estimated scanning time, the pre-scanning travel and the estimated scanning file size; and receiving an adjusting parameter of the scanning area and adjusting the scanning area.

9. The system for acquiring and evaluating scan data according to claim 6, wherein said pre-scanner comprises: a to-be-scanned area setting unit and a pre-scanning parameter obtaining unit; wherein,

the scanning device comprises a scanning parameter acquisition unit, a to-be-scanned area setting unit, a pre-scanning parameter acquisition unit and a scanning parameter acquisition unit, wherein the to-be-scanned area setting unit is connected with the pre-scanning parameter acquisition unit and is used for taking a scanning point of a scanner as an angular point of an area to be scanned when the scanning point reaches the measuring point in a target area and receives a setting instruction, and taking an area obtained by connecting the angular points as the area to be scanned when four angular points are continuously detected;

the pre-scanning parameter acquisition unit is connected with the to-be-scanned area setting unit and the scanning adjuster and is used for pre-scanning along the peripheral line of the to-be-scanned area to obtain the pre-scanning time, the pre-scanning file size and the pre-scanning stroke of the to-be-scanned area.

10. The system for collecting and evaluating scan data according to any of claims 6 to 9, wherein the standard plate has a surface roughness of 2um-5 um.