CN100376863C - Image measurement system and method for radiator level difference - Google Patents

Abstract

The present invention provides an image measuring system of radiator section difference, which comprises a client computer, an appliance server, an X-directional servo axle, a Y-directional servo axle, a laser displacement sensor, a laser displacement controller, an information acquisition card and a work carrying table, wherein the application server comprises a plurality of software functional modules for controlling operation steps of section difference measurement; the software functional module mainly comprises an information storage module, an information calling module, a parameter setting module, a section difference measurement module, an automatic alarm module and a measurement result display module. The present invention also provides a method for radiator section difference image measurement. The image measuring system and the method of radiator section difference of the present invention can adopts an image measuring mode to measure the section difference of a workpiece, and the present invention has the advantages of high measuring accuracy and high speed, and a workpiece can not be contacted.

Description

Image measurement system and method for radiator level difference

【Technical field】

The present invention relates to an image measurement system and method, in particular to a radiator level difference image measurement system and method.

【Background technique】

The center of the radiator - the copper rod, the level difference between its surface and the surrounding aluminum surface requires high precision. The produced radiators must go through the level difference measurement. The traditional measurement is done by the staff using measuring tools, manual operation The error is large, the efficiency is low, and the accuracy is difficult to guarantee, and the method must touch the surface of the workpiece, which is easy to cause scratches on the surface of the workpiece.

With the development and application of computer technology, measurement technology is no longer limited to manual operations. For example, the Patent No. 452524 announced by Taiwan Intellectual Property Office on September 1, 2001, the patent name is "Image Measurement Method for Forming Grinding Center", which discloses an image measurement method for forming grinding center Method, the measurement method includes the following steps: 1. Capture the workpiece image; 2. Find the edge coordinates of the workpiece; 3. Use the corresponding function to obtain the physical coordinates; 4. Calculate the arc by the curve approximation rule and regression; 5. Find the line 6. Judging whether the outline of the overall workpiece is completed; through the aforementioned measurement process to determine whether the overall outline of the workpiece is completed, if not, then proceed to the aforementioned process until the outline of the entire workpiece After the profile is completed, the size of the workpiece processed so far can be calculated, and the size is compared with the target size, and the difference is calculated. If the target size is not reached, the size that must be reprocessed can be returned. In order to provide the size of the grinding wheel of the grinding center that must be re-feeded. The disadvantage of this technology is that the image measurement method is used to determine whether the overall contour of the workpiece is completed, and cannot solve the problem of measurement and calculation of step difference.

In order to solve the shortcomings of the above-mentioned technologies, a system is needed that can complete the image measurement operation of the level difference without touching the workpiece.

【Content of invention】

The main purpose of the present invention is to provide a radiator level difference image measurement system, which can measure whether the level difference of a workpiece is within a specified tolerance range by means of image measurement, and avoid touching the workpiece during measurement.

Another object of the present invention is to provide an image measuring method for the level difference of a radiator, which can measure whether the level difference of a workpiece is within a specified tolerance range by means of image measurement, and avoid touching the workpiece during measurement.

In order to achieve the above object, the present invention provides a radiator level difference image measurement system, the radiator level difference image measurement system includes a client computer, an application server, an X-direction servo axis, a Y-direction servo axis, a laser A displacement sensor, a laser displacement controller, an information acquisition card and a work platform. The application server includes a plurality of software function modules, which are used to control the step difference measurement operation steps. The software function module mainly includes an information storage module, an information call module, a parameter setting module, a segment difference measurement module, an automatic alarm module and a measurement result display module.

The information storage module is used to store the parameters preset by the user, including: material number, nominal value of step difference, upper tolerance, lower tolerance, search points, workpiece size such as workpiece length, workpiece width, etc., copper rod size such as copper rod diameter , Copper point shrinkage, etc. A measuring process of workpiece segment difference measures four segment differences and eight test points, including four points of aluminum and four points of copper, and the shrinkage value of the copper point is the indentation of the four points on the copper from the circumference of the copper rod. The distance; the aluminum point overhang value is the distance that the four points on the aluminum block extend outward from the circumference of the copper rod. The information call module is used to call the above information according to the workpiece material number during the actual step difference measurement. The parameter setting module is used to set the parameters required for step difference measurement, including: buzzer alarm time, number of workpieces to be measured, movement mode, etc. The segment difference measurement module is used to obtain measurement points and calculate the segment difference value, which includes: an automatic point acquisition sub-module, a segment difference measurement calculation sub-module and a measurement result comparison sub-module. The automatic point-taking sub-module is used to issue point-taking commands to the servo axis in the X direction and the servo axis in the Y direction, control its moving direction and moving distance according to the preset maximum number of search points, and obtain measuring points, including four points on copper and aluminum Up to four points. The segment difference measurement and calculation sub-module is used to measure the coordinate values of each point, including measuring the X-axis coordinate value, the Y-axis coordinate value and the Z-axis coordinate value, and calculating the segment difference value. First find the minimum fitting plane equation of the four points on the aluminum according to the four points, and then calculate the distance from each point on the copper to the plane, which is the segment difference value of the point. The measurement result comparison sub-module is used to compare the step difference value calculated above with the step difference work scale value set in the information storage module, and judge whether it exceeds the specified tolerance range. The automatic alarm module is used to send an alarm when the measured segment difference does not meet the specified tolerance range, prompting the user that the segment difference of the workpiece exceeds the standard. The measurement result display module is used to display the measurement results, including digital display and graphic display. The digital display directly displays the segment difference of each point; the graphic display uses a waveform to display the segment difference change.

The present invention also provides a radiator level difference image measurement method, which includes the following steps:

(a) Start the image measurement system for the radiator step difference; (b) Call the stored information according to the workpiece number; (c) Set the parameters required for step difference measurement; (d) Issue a command to fetch points to the X-direction servo axis and The servo axis in the Y direction controls its moving direction and moving distance according to the preset maximum number of search points, and obtains measuring points, including four points on copper and four points on aluminum; (e) measuring the coordinate values of each point, including Measure the X-axis coordinate value, the Y-axis coordinate value and the Z-axis coordinate value, and calculate the segment difference value; (f) compare the segment difference value obtained by the above calculation with the preset segment difference work scale value, and judge whether it exceeds the specified tolerance range; ( g) If the calculated step difference exceeds the specified range, an automatic alarm will be issued; (h) if the calculated step difference does not exceed the specified range, the measurement result will be displayed.

The image measuring system and method for the level difference of the radiator of the present invention can measure the level difference of the workpiece by using the image measurement method, the measurement accuracy is high, the speed is fast, and the workpiece will not be touched.

【Description of drawings】

FIG. 1 is a hardware architecture diagram of the radiator level difference image measurement system of the present invention.

Fig. 2 is a diagram of the main software function modules of the application server of the radiator level difference image measurement system of the present invention.

Fig. 3 is a flow chart of the operation of the method for measuring radiator level difference images according to the present invention.

【Detailed ways】

Please refer to FIG. 1 , which is a hardware architecture diagram of the radiator level difference image measurement system of the present invention. The radiator level difference image measurement system includes a client computer 1, an application server 2, an X-direction servo axis 3, a Y-direction servo axis 4, a laser displacement sensor 5, a laser displacement controller 6, an information acquisition Get card 7 and a work platform 8. The client computer 1 provides an operation interface for receiving the operation status information sent by the application server 2 and dynamically displaying the system operation status, and receiving user instructions and sending them to the application server 2 . The application server 2 includes a plurality of software function modules, which are used to control the step difference measurement operation steps, and send internal instructions to the X-direction servo axis 3 and the Y-direction servo axis 4. The internal instructions can be the moving direction or moving distance of the X and Y axes, etc. . The X-direction servo axis 3 is connected to the Y-direction servo axis 4, and a laser displacement sensor 5 is installed on it. The X-direction servo axis 3 and the Y-direction servo axis 4 receive internal instructions sent by the application server 2 to drive the laser displacement sensor 5 to move. Acquire the laser signal of the measurement object. The laser displacement controller 6 is connected with the laser displacement sensor 5, and is used for receiving the laser signal acquired by the laser displacement sensor 5 and converting it into an analog signal. The information acquisition card 7 is connected with the laser displacement controller 6 for receiving the above-mentioned simulation signal, converting it into a digital signal and sending it to the application server 2 . The work platform 8 is provided with a plurality of grooves (not shown in the figure) for placing the measurement workpiece. When measuring the level difference, the work platform 8 can receive the instruction sent by the application server 2 to drive the measurement workpiece to rotate. The measured workpiece is rotated away from the laser displacement sensor 5 , and the workpiece to be measured is rotated below the laser displacement sensor 5 .

Please refer to FIG. 2 , which is a diagram of the main software function modules of the application server of the radiator level difference image measurement system of the present invention. The application server 2 of the present invention mainly includes an information storage module 20 , an information call module 21 , a parameter setting module 22 , a segment difference measurement module 23 , an automatic alarm module 24 and a measurement result display module 25 .

The information storage module 20 is used to store the parameters preset by the user, including: material number, nominal value of step difference, upper tolerance, lower tolerance, search points, workpiece size such as workpiece length, workpiece width, etc., copper rod size such as copper rod Diameter, copper point shrinkage, etc. A measuring process of workpiece segment difference measures four segment differences and eight test points, including four points of aluminum and four points of copper, and the shrinkage value of the copper point is the indentation of the four points on the copper from the circumference of the copper rod. The distance; the aluminum point overhang value is the distance that the four points on the aluminum block extend outward from the circumference of the copper rod. The information calling module 21 is used to call the above information according to the workpiece number during the actual step measurement. The parameter setting module 22 is used to set the parameters required for level difference measurement, including: buzzer alarm time, number of workpieces to be measured, movement mode and so on. The step difference measurement module 23 is used to obtain measurement points and calculate the step difference value, which includes a plurality of submodules: an automatic point acquisition submodule 230 , a step difference measurement calculation submodule 231 and a measurement result comparison submodule 232 . The automatic point-taking sub-module 230 is used to issue a point-taking command to the servo axis in the X direction and the servo axis in the Y direction, control its moving direction and moving distance according to the preset maximum number of search points, and obtain measurement points, including four points on the copper and Four dots on aluminum. The step difference measurement and calculation sub-module 231 is used for measuring the coordinate values of each point, including measuring the X-axis coordinate value, the Y-axis coordinate value and the Z-axis coordinate value, and calculating the step difference value. When calculating the segment difference measurement value, first calculate the minimum fitting plane equation of the four points on the aluminum, and then calculate the distance from each point on the copper to the plane, which is the segment difference value of the point. The measurement result comparison sub-module 232 is used to compare the calculated step difference with the step difference set in the information storage module 20 to determine whether it exceeds the specified tolerance range. The automatic alarm module 24 is used to issue an alarm when the measured step difference does not meet the specified tolerance range, prompting the user that the step difference of the workpiece exceeds the standard. The measurement result display module 25 is used to display the measurement results, including digital display and graphic display. The digital display directly displays the segment difference of each point; the graphic display uses a waveform diagram to display the segment difference change.

Please refer to FIG. 3 , which is a flowchart of the operation of the image measuring method for radiator level difference according to the present invention. Firstly, start the radiator step image measurement system (step S300). The information calling module 21 calls the information stored in the information storage module 20 according to the workpiece number (step S301 ). The parameter setting module 22 sets the parameters required for step difference measurement, including: buzzer alarm time, number of workpieces to be measured, movement mode, etc. (step S302 ). The automatic point-taking sub-module 230 sends a point-taking command to the servo axis in the X direction and the servo axis in the Y direction, controls its moving direction and moving distance according to the preset maximum number of search points, and obtains measurement points, including four points on copper and aluminum four points (step S303). The segment difference measurement and calculation sub-module 231 measures the coordinate values of each point, including the X-axis coordinate value, the Y-axis coordinate value and the Z-axis coordinate value, and calculates the segment difference value: firstly, according to the four points on the aluminum, find the minimum fitting plane equation where the four points are located , then calculate the distance from each point on the copper to the plane to be the segment difference value of the point (step S304). The measurement result comparison sub-module 232 compares the calculated step difference with the step difference set in the information storage module 20, and judges whether it exceeds the specified tolerance range (step S305). If the calculated segment difference exceeds the specified range, the automatic alarm module 24 will automatically alarm (step S306). If the calculated segment difference does not exceed the specified range, the measurement result display module 25 displays the measurement result, including two modes of digital display and graphic display. The digital display directly displays the segment difference at each point; the graphic display is to display the segment difference change in a waveform diagram (step S307).

Claims (13)

1. section difference of heat radiator image measurement system, comprise a client computer, an application server, a directions X axis servomotor, a Y direction axis servomotor, a laser displacement sensor, a laser displacement controller, an information extraction card and a work microscope carrier, it is characterized in that application server comprises:

One information storage module is used to store user's preset parameters;

One information calling module is used for calling above-mentioned predefined information according to the workpiece item number when actual section residual quantity is surveyed;

One parameter setting module is used for setting the section residual quantity and surveys desired parameters;

One section residual quantity is surveyed module, is used to obtain gauge point, the compute segment difference, and it comprises a plurality of submodules:

One gets a submodule automatically, is used to send get dot command to directions X axis servomotor and Y direction axis servomotor, counts according to predefined maximum search and controls the moving direction and the displacement of directions X axis servomotor and Y direction axis servomotor, obtains gauge point;

One section residual quantity is surveyed calculating sub module, is used to measure the each point coordinate figure, comprises measuring X-axis coordinate figure, Y-axis coordinate figure and Z axial coordinate value, compute segment difference;

One measurement comparer module, a section difference worker who is used for aforementioned calculation gained section difference and information storage module are set claims value to compare, and judges whether the out-of-size specialized range;

One automatic alarm module is used for sending warning when measuring the against regulation margin tolerance of gained section difference;

One measurement display module is used to show measurement.

2. section difference of heat radiator image measurement system as claimed in claim 1, it is characterized in that, wherein client computer links to each other with application server, is used to receive user's instruction and is sent to the application server end, and receive the operational status information display system mode of operation that the application server end sends.

3. section difference of heat radiator image measurement system as claimed in claim 1, it is characterized in that, wherein the directions X axis servomotor is connected with Y direction axis servomotor, laser displacement sensor is installed on it, directions X axis servomotor and Y direction axis servomotor receive the built-in command that application server sends, the drive laser displacement sensor moves, and obtains the laser signal that measures object.

4. section difference of heat radiator image measurement system as claimed in claim 3 is characterized in that, wherein the built-in command of application server transmission is the moving direction of X-axis, y-axis shift, or is the moving distance of X-axis, y-axis shift.

5. section difference of heat radiator image measurement system as claimed in claim 3 is characterized in that wherein the laser displacement controller links to each other with laser displacement sensor, is used for the laser signal that laser displacement sensor obtains is converted to simulate signal.

6. section difference of heat radiator image measurement system as claimed in claim 5, it is characterized in that, wherein the information extraction card links to each other with application server and laser displacement controller, is used for that the simulate signal after the conversion of laser displacement controller is converted to digital signal and is sent to application server.

7. section difference of heat radiator image measurement system as claimed in claim 1, it is characterized in that, the microscope carrier of wherein working is provided with a plurality of grooves and is used to place measuring workpiece, this work microscope carrier can receive the order tape momentum survey Workpiece Rotating that application server sends when measuring the section difference, the Workpiece Rotating that has measured is left laser displacement sensor, workpiece for measurement is rotated to the laser displacement sensor below.

8. section difference of heat radiator image measurement system as claimed in claim 1, it is characterized in that, its stage casing residual quantity survey calculating sub module compute segment difference be earlier according on the aluminium 4 obtain the minimum fit Plane equations in this 4 places, calculate each point on the copper is this point to the distance on this plane section difference again.

9. section difference of heat radiator image measurement system as claimed in claim 1, it is characterized in that, wherein the measurement display module shows measurement with numeral, or with the graphic presentation measurement, described numeral shows it is directly to show each point section difference with numeral, and graphic presentation is to change with oscillogram display segment difference.

10. a method of utilizing the described section difference of heat radiator image measurement system of claim 1 to carry out the section difference of heat radiator image measurement is characterized in that, comprises the steps:

Start this section difference of heat radiator image measurement system;

Call canned data according to the workpiece item number;

Set the section residual quantity and survey desired parameters;

Send and get dot command,, obtain gauge point, comprise on the copper four points on four points and the aluminium according to predefined maximum search the count moving direction and the displacement of control directions X axis servomotor and Y direction axis servomotor to directions X axis servomotor and Y direction axis servomotor;

Measure the each point coordinate figure, comprise measuring X-axis coordinate figure, Y-axis coordinate figure and Z axial coordinate value, compute segment difference;

Claim the value comparison with aforementioned calculation gained section difference and predefined section poor worker, judge whether the out-of-size specialized range;

If calculate gained section difference overshoot scope, then report to the police automatically;

Do not have the overshoot scope if calculate gained section difference, then show measurement.

11. section difference of heat radiator image measurement method as claimed in claim 10, it is characterized in that, wherein the step of compute segment difference be according on the aluminium 4 obtain the minimum fit Plane equations in this 4 places, calculate each point on the copper is this point to the distance on this plane section difference again.

12. section difference of heat radiator image measurement method as claimed in claim 10, it is characterized in that, the step that wherein shows measurement comprises that numeral shows and the graphic presentation dual mode, and it is directly to show each point section difference with numeral that numeral shows, graphic presentation is to change with oscillogram display segment difference.

13. section difference of heat radiator image measurement method as claimed in claim 10 is characterized in that, the step of wherein setting section residual quantity survey desired parameters comprises setting: buzzer warning time, measuring workpiece number and mode of motion.

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