CN118914618B - Flying probe tester testing method and system - Google Patents
Flying probe tester testing method and system Download PDFInfo
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- CN118914618B CN118914618B CN202411408561.5A CN202411408561A CN118914618B CN 118914618 B CN118914618 B CN 118914618B CN 202411408561 A CN202411408561 A CN 202411408561A CN 118914618 B CN118914618 B CN 118914618B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
- G01R31/2808—Holding, conveying or contacting devices, e.g. test adapters, edge connectors, extender boards
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- General Engineering & Computer Science (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a test method and a test system of a flying probe tester, which comprise the steps of calculating to obtain a geometric center of a probe, obtaining a moving range of the geometric center of the probe, calculating to obtain the geometric center of a product to be tested, calculating to obtain at least one supporting point of a device to be tested, generating a primary calibration area, generating a supporting point identification area, and guiding the product to be tested to be placed on a test platform of the tester by voice. Through setting up primary calibration module, secondary calibration module and central calculation module, divide into two parts with the calibration of test, use voice guide manual operation to place the product of waiting to test on the test machine, adjust and control swiftly, and the product of waiting to test is in the adjustment scope of probe, use the position of secondary calibration module fine adjustment probe for the induced current that produces between probe and the product of waiting to test is biggest, thereby wait to test the product and can obtain the biggest test current, consequently can make the efficiency of software testing maximize.
Description
Technical Field
The invention relates to the technical field of flying probe testers, in particular to a testing method and a testing system of a flying probe tester.
Background
The electrical performance detection is a process which the PCB must pass in the manufacturing process, the current flying probe tester is main flow testing equipment for detecting the electrical performance of the PCB in a contact mode, and the testing requirements of the flying probe tester in the current market mainly comprise accurate motion control, reliable electrical performance, quick testing efficiency and various testing capabilities, and a good mechanical structure is a key for realizing testing accuracy.
The existing electrical performance detection technology lacks that the optimal test angle and the optimal test height between the product to be tested and the probe of the flying needle tester need to be adjusted for multiple times, so that the test efficiency is relatively troublesome, the requirements of staff are difficult to meet, and popularization and use are not facilitated.
Disclosure of Invention
In order to solve the technical problems, the technical scheme solves the problems that the prior electrical performance detection technology provided in the background art is deficient in calibrating a product to be tested and a probe of the flying needle tester, the optimal test angle and the optimal test height between the product to be tested and the probe of the flying needle tester need to be adjusted for multiple times, the test efficiency is relatively troublesome, the requirements of staff are difficult to meet, and popularization and use are not facilitated.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A flying probe tester test method comprising:
Calculating to obtain the geometric center of the probe, obtaining the initial coordinate of the geometric center of the probe, and enabling the probe to transversely move or longitudinally move a preset distance on a testing machine to obtain the moving range of the geometric center of the probe;
The method comprises the steps that a product to be tested is close to a testing machine, the product to be tested is scanned, the geometric center of the product to be tested is obtained through calculation, the product to be tested is scanned, and at least one supporting point of the product to be tested is obtained through calculation;
Generating a primary calibration area, generating a supporting point identification area, guiding a product to be tested to be placed on a test platform of a tester by voice, wherein the position of the product to be tested is satisfied that at least one supporting point is in the supporting point identification area, and the geometric center of the product to be tested is in the primary calibration area;
the probe moves to a position where the geometric center of the probe coincides with the geometric center of the product to be tested on the testing machine;
According to the probe and the product to be tested, determining an optimal test distance, determining an optimal test angle, lifting the test platform to a preset height, horizontally rotating the test platform by the optimal test angle, and enabling the preset height to be equal to the optimal test distance between the probe and the product to be tested.
Preferably, the calculating the geometric center of the probe comprises the steps of:
Scanning to obtain a first boundary curve of the inner side edge of the probe, and scanning to obtain a second boundary curve of the outer side edge of the probe;
generating a first boundary curve and a second boundary curve in the same coordinate system;
Uniformly taking at least one first identification point along the first boundary curve, and obtaining a first fitting function of the first identification point according to the coordinates of the first identification point;
uniformly taking at least one second identification point along a second boundary curve, and obtaining a second fitting function of the second identification point according to the coordinates of the second identification point;
Calculating coordinates of the geometric center of the probe by using a geometric center formula;
The geometric center formula is as follows:
;
The integral region is a region surrounded by the first fitting function and the first fitting function, V is the area of the integral region, X is the abscissa of the geometric center of the probe, Y is the ordinate of the geometric center of the probe, and (X, Y) is the coordinates of points in the integral region.
Preferably, the moving range of the geometric center of the acquisition probe comprises the following steps:
And taking the initial coordinate of the geometric center of the probe as a circle center, taking a preset distance as a radius, and taking the identification circle as the moving range of the geometric center of the probe.
Preferably, the calculating to obtain the geometric center of the product to be tested includes the following steps:
Scanning to obtain a first edge curve of the inner side edge of the product to be tested, and scanning to obtain a second edge curve of the outer side edge of the product to be tested;
Generating a first edge curve and a second edge curve in the same coordinate system;
Uniformly taking at least one first fitting point along the first edge curve, and obtaining a first approximation function of the first fitting point according to the coordinates of the first fitting point;
Uniformly taking at least one second fitting point along the second edge curve, and obtaining a second approximation function of the second fitting point according to the coordinates of the second fitting point;
Calculating the coordinates of the geometric center of the product to be tested by using a geometric center formula;
The geometric center formula is as follows:
;
the integration area is an area surrounded by the first approximation function and the first approximation function, W is the area of the integration area, Z is the abscissa of the geometric center of the product to be tested, R is the ordinate of the geometric center of the product to be tested, and (x, y) is the coordinate of a point in the integration area.
Preferably, the calculating to obtain at least one supporting point of the product to be tested comprises the following steps:
Obtaining a marginal curve of a product to be tested, uniformly selecting at least one marginal point along the marginal curve, and passing the marginal point to make a tangent line;
And (3) taking the crossing boundary point as a normal line perpendicular to the corresponding tangent line, wherein the length of the normal line is d, checking whether a region formed by connecting the endpoints of the normal line positioned in the boundary curve can be contained by the supporting point identification region, if so, taking at least one endpoint as at least one supporting point, and if not, taking r as the amplitude to increase the length of the normal line.
Preferably, the generating the primary calibration area comprises the steps of:
a calibration circle is arbitrarily defined, which is included in the movement range of the geometric center of the probe, and is taken as a primary calibration area.
Preferably, the generating the supporting point identification area includes the following steps:
scanning the edge of the test platform, and taking the area surrounded by the edge of the test platform as a supporting point identification area.
Preferably, the probe is moved on the testing machine to a position where the geometric center of the probe coincides with the geometric center of the product to be tested, comprising the following steps:
acquiring the coordinates of the geometric center of the probe, and acquiring the coordinates of the geometric center of the product to be tested;
According to the coordinates of the two, calculating the motion vector of the geometric center of the probe ;
And respectively moving the coordinates e units of the geometric center of the probe transversely according to the direction of the component of the motion vector in the transverse direction or the longitudinal direction, and moving the coordinates f units of the geometric center of the probe longitudinally.
Preferably, the determining the optimal test distance includes the steps of:
the test platform slowly rises from the lowest point, an inductor is arranged on the test machine, the inductor measures an induction electric field generated by induction current in the product to be tested, and the induction current is positively correlated with the test current of the product to be tested;
When the induced current is high and starts to decline, taking the height of the corresponding test platform at the high point of the induced current as the optimal test distance;
determining the optimal test angle comprises the steps of:
the test platform is slow, an inductor is arranged on the test machine, the inductor measures an induction electric field generated by induction current in the product to be tested, and the induction current is positively correlated with the test current of the product to be tested;
When the induced current is high and starts to decline, the rotation angle of the corresponding test platform at the high point of the induced current is taken as the optimal test angle.
A test system of a flying probe tester is used for realizing the test method of the flying probe tester, and comprises the following steps:
The center calculating module is used for calculating and obtaining the geometric center of the probe and calculating and obtaining the geometric center of the product to be tested;
the scanning module is used for scanning the product to be tested;
The range estimation module is used for acquiring the moving range of the geometric center of the probe;
The primary calibration module is used for guiding the product to be tested to be placed on a test platform of the tester, the position of the product to be tested is satisfied that at least one supporting point is in a supporting point identification area, and the geometric center of the product to be tested is in the primary calibration area;
The secondary calibration module is used for controlling the probe to move to a position where the geometric center of the probe coincides with the geometric center of the product to be tested in the testing machine, controlling the testing platform to rise and fall to a preset height, and controlling the testing platform to horizontally rotate by an optimal testing angle;
The identification area module is used for generating a primary calibration area and a supporting point identification area;
And the voice guidance module is used for sending out voice guidance.
The working process of the test system of the flying probe tester is as follows:
The method comprises the steps that firstly, a center calculation module calculates and obtains the geometric center of a probe, initial coordinates of the geometric center of the probe are obtained, and a range estimation module obtains the moving range of the geometric center of the probe;
Scanning the product to be tested by a scanning module, calculating by a center calculating module to obtain the geometric center of the product to be tested, scanning the product to be tested by the scanning module, and calculating by the center calculating module to obtain at least one supporting point of the product to be tested;
Step three, a primary calibration area is generated by an identification area module, and a supporting point identification area is generated by the identification area module;
The voice guidance module sends out voice guidance, the auxiliary primary calibration module guides the product to be tested to be placed on a test platform of the tester, the position of the product to be tested is satisfied that at least one supporting point is in a supporting point identification area, and the geometric center of the product to be tested is in a primary calibration area;
And fifthly, the secondary calibration module controls the probe to move to a position where the geometric center of the probe coincides with the geometric center of the product to be tested, determines an optimal test distance according to the probe and the product to be tested, determines an optimal test angle, controls the test platform to rise and fall to a preset height, controls the test platform to horizontally rotate by the optimal test angle, and the preset height is satisfied that the distance between the probe and the product to be tested is equal to the optimal test distance.
Compared with the prior art, the invention has the beneficial effects that:
Through setting up primary calibration module, secondary calibration module and central calculation module, divide into two parts with the calibration of test, use voice guide manual operation to place the product of waiting to test on the test machine, adjust and control swiftly, and the product of waiting to test is in the adjustment scope of probe, use the position of secondary calibration module fine adjustment probe for the induced current that produces between probe and the product of waiting to test is biggest, thereby wait to test the product and can obtain the biggest test current, consequently can make the efficiency of software testing maximize.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention;
FIG. 2 is a flow chart of a method for calculating the geometric center of a probe according to the present invention;
FIG. 3 is a flow chart of a method for calculating and obtaining a geometric center of a product to be tested according to the present invention;
FIG. 4 is a flow chart of a method for calculating at least one supporting point of a product to be tested according to the present invention;
FIG. 5 is a flow chart of a method for determining an optimal test distance according to the present invention;
FIG. 6 is a flow chart of a method for determining an optimal test angle according to the present invention.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
Referring to fig. 1, a test method of a flying probe tester includes:
Calculating to obtain the geometric center of the probe, obtaining the initial coordinate of the geometric center of the probe, and enabling the probe to transversely move or longitudinally move a preset distance on a testing machine to obtain the moving range of the geometric center of the probe;
The method comprises the steps that a product to be tested is close to a testing machine, the product to be tested is scanned, the geometric center of the product to be tested is obtained through calculation, the product to be tested is scanned, and at least one supporting point of the product to be tested is obtained through calculation;
Generating a primary calibration area, generating a supporting point identification area, guiding a product to be tested to be placed on a test platform of a tester by voice, wherein the position of the product to be tested is satisfied that at least one supporting point is in the supporting point identification area, and the geometric center of the product to be tested is in the primary calibration area;
the probe moves to a position where the geometric center of the probe coincides with the geometric center of the product to be tested on the testing machine;
According to the probe and the product to be tested, determining an optimal test distance, determining an optimal test angle, lifting the test platform to a preset height, horizontally rotating the test platform by the optimal test angle, and enabling the preset height to be equal to the optimal test distance between the probe and the product to be tested.
Referring to fig. 2, calculating the geometric center of the obtained probe includes the steps of:
Scanning to obtain a first boundary curve of the inner side edge of the probe, and scanning to obtain a second boundary curve of the outer side edge of the probe;
generating a first boundary curve and a second boundary curve in the same coordinate system;
Uniformly taking at least one first identification point along the first boundary curve, and obtaining a first fitting function of the first identification point according to the coordinates of the first identification point;
uniformly taking at least one second identification point along a second boundary curve, and obtaining a second fitting function of the second identification point according to the coordinates of the second identification point;
Calculating coordinates of the geometric center of the probe by using a geometric center formula;
The geometric center formula is as follows:
;
The integration area is an area surrounded by the first fitting function and the first fitting function, V is the area of the integration area, X is the abscissa of the geometric center of the probe, Y is the ordinate of the geometric center of the probe, and (X, Y) is the coordinates of points in the integration area;
The geometric center of the probe and the geometric center of the product to be tested are obtained through calculation, so that when the probe and the product to be tested are controlled to move, a reference point can be provided, the reference point must be met, when the testing efficiency is highest, the two reference points must be overlapped in the vertical direction, and therefore, the collection center is selected as the reference point to meet the requirements, and meanwhile, the calculation is convenient.
Acquiring the moving range of the geometric center of the probe comprises the following steps:
Taking initial coordinates of the geometric center of the probe as a circle center, taking a preset distance as a radius, and taking the initial coordinates as an identification circle, wherein the identification circle is the moving range of the geometric center of the probe;
The moving range of the geometric center of the probe is obtained, so that when the product to be tested is guided by voice to be placed on a test platform of the tester, the geometric center of the product to be tested can be placed in the moving range of the geometric center of the probe, and under the guidance of voice, the product to be tested is placed in a larger area very easy for operators, and meanwhile, the geometric center of the subsequent probe can also move through the control of the geometric center of the probe, so that the geometric center of the probe coincides with the geometric center of the product to be tested.
Referring to fig. 3, the calculation of the geometric center of the product to be tested includes the following steps:
Scanning to obtain a first edge curve of the inner side edge of the product to be tested, and scanning to obtain a second edge curve of the outer side edge of the product to be tested;
Generating a first edge curve and a second edge curve in the same coordinate system;
Uniformly taking at least one first fitting point along the first edge curve, and obtaining a first approximation function of the first fitting point according to the coordinates of the first fitting point;
Uniformly taking at least one second fitting point along the second edge curve, and obtaining a second approximation function of the second fitting point according to the coordinates of the second fitting point;
Calculating the coordinates of the geometric center of the product to be tested by using a geometric center formula;
The geometric center formula is as follows:
;
the integration area is an area surrounded by the first approximation function and the first approximation function, W is the area of the integration area, Z is the abscissa of the geometric center of the product to be tested, R is the ordinate of the geometric center of the product to be tested, and (x, y) is the coordinate of a point in the integration area.
Referring to fig. 4, calculating at least one supporting point of the device under test includes the steps of:
Obtaining a marginal curve of a device to be tested, uniformly selecting at least one marginal point along the marginal curve, and passing the marginal point to make a tangent line;
Taking the crossing boundary point as a normal line perpendicular to the corresponding tangent line, wherein the length of the normal line is d, checking whether a region formed by connecting endpoints of the normal line positioned in the boundary curve can be contained by a supporting point identification region, if so, taking at least one endpoint as at least one supporting point, and if not, taking r as the amplitude to increase the length of the normal line;
The purpose of calculating at least one supporting point of the device to be tested is that when the at least one supporting point is placed in the supporting point identification area, the gravity center of the device to be tested can be located on the test platform, and the support of a plurality of points can be obtained, so that the device to be tested cannot fall off the test platform, and continuous and stable test can be carried out.
Generating the primary calibration area comprises the steps of:
Arbitrarily defining a calibration circle, wherein the calibration circle is contained in the moving range of the geometric center of the probe, and the calibration circle is taken as a primary calibration area;
The primary calibration area is included in the range of movement of the geometric center of the probe so that points within the primary calibration area can be moved by the geometric center of the probe to coincide with the geometric center of the product to be tested, and the geometric center of the probe is within the primary calibration area so that the geometric center of the probe can be moved to coincide with the geometric center of the product to be tested.
Generating the supporting point identification area comprises the following steps:
scanning the edge of the test platform, and taking the area surrounded by the edge of the test platform as a supporting point identification area.
Referring to fig. 5, the probe is moved on the tester to a position where the geometric center of the probe coincides with the geometric center of the product to be tested, comprising the steps of:
acquiring the coordinates of the geometric center of the probe, and acquiring the coordinates of the geometric center of the product to be tested;
According to the coordinates of the two, calculating the motion vector of the geometric center of the probe ;
And respectively moving the coordinates e units of the geometric center of the probe transversely according to the direction of the component of the motion vector in the transverse direction or the longitudinal direction, and moving the coordinates f units of the geometric center of the probe longitudinally.
Referring to fig. 6, determining the optimal test distance includes the steps of:
the test platform slowly rises from the lowest point, an inductor is arranged on the test machine, the inductor measures an induction electric field generated by induction current in the product to be tested, and the induction current is positively correlated with the test current of the product to be tested;
When the induced current is high and starts to decline, taking the height of the corresponding test platform at the high point of the induced current as the optimal test distance;
because the function of the change of the test current along with the height has a maximum value according to the actual situation and is inevitably ascending and then descending, when the induced current has a high point and begins to descend, the corresponding height of the test platform at the high point of the induced current can be used as the optimal test distance;
determining the optimal test angle comprises the steps of:
the test platform is slow, an inductor is arranged on the test machine, the inductor measures an induction electric field generated by induction current in the product to be tested, and the induction current is positively correlated with the test current of the product to be tested;
When the induced current is high and starts to decline, taking the rotation angle of the corresponding test platform at the high point of the induced current as an optimal test angle;
because the function of the change of the test current along with the angle has a maximum value according to the actual situation, and the function is inevitably ascending and then descending, when the induced current has a high point and begins to descend, the rotation angle of the corresponding test platform at the high point of the induced current can be used as the optimal test angle.
A test system of a flying probe tester is used for realizing the test method of the flying probe tester, and comprises the following steps:
The center calculating module is used for calculating and obtaining the geometric center of the probe and calculating and obtaining the geometric center of the product to be tested;
the scanning module is used for scanning the product to be tested;
The range estimation module is used for acquiring the moving range of the geometric center of the probe;
The primary calibration module is used for guiding the product to be tested to be placed on a test platform of the tester, the position of the product to be tested is satisfied that at least one supporting point is in a supporting point identification area, and the geometric center of the product to be tested is in the primary calibration area;
The secondary calibration module is used for controlling the probe to move to a position where the geometric center of the probe coincides with the geometric center of the product to be tested in the testing machine, controlling the testing platform to rise and fall to a preset height, and controlling the testing platform to horizontally rotate by an optimal testing angle;
The identification area module is used for generating a primary calibration area and a supporting point identification area;
And the voice guidance module is used for sending out voice guidance.
The working process of the test system of the flying probe tester is as follows:
The method comprises the steps that firstly, a center calculation module calculates and obtains the geometric center of a probe, initial coordinates of the geometric center of the probe are obtained, and a range estimation module obtains the moving range of the geometric center of the probe;
Scanning the product to be tested by a scanning module, calculating by a center calculating module to obtain the geometric center of the product to be tested, scanning the product to be tested by the scanning module, and calculating by the center calculating module to obtain at least one supporting point of the product to be tested;
Step three, a primary calibration area is generated by an identification area module, and a supporting point identification area is generated by the identification area module;
The voice guidance module sends out voice guidance, the auxiliary primary calibration module guides the product to be tested to be placed on a test platform of the tester, the position of the product to be tested is satisfied that at least one supporting point is in a supporting point identification area, and the geometric center of the product to be tested is in a primary calibration area;
And fifthly, the secondary calibration module controls the probe to move to a position where the geometric center of the probe coincides with the geometric center of the product to be tested, determines an optimal test distance according to the probe and the product to be tested, determines an optimal test angle, controls the test platform to rise and fall to a preset height, controls the test platform to horizontally rotate by the optimal test angle, and the preset height is satisfied that the distance between the probe and the product to be tested is equal to the optimal test distance.
In summary, the invention has the advantages that the primary calibration module, the secondary calibration module and the central calculation module are arranged to divide the calibration of the test into two parts, the product to be tested is manually placed on the test machine by voice guidance, the adjustment and the control are quick, the product to be tested is in the adjustment range of the probe, and the secondary calibration module is used to finely adjust the position of the probe, so that the induction current generated between the probe and the product to be tested is maximum, the product to be tested can obtain the maximum test current, and the test efficiency is maximized.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A method of testing a flying probe tester, comprising:
Calculating to obtain the geometric center of the probe, obtaining the initial coordinate of the geometric center of the probe, and enabling the probe to transversely move or longitudinally move a preset distance on a testing machine to obtain the moving range of the geometric center of the probe;
The method comprises the steps that a product to be tested is close to a testing machine, the product to be tested is scanned, the geometric center of the product to be tested is obtained through calculation, the product to be tested is scanned, and at least one supporting point of the product to be tested is obtained through calculation;
Generating a primary calibration area, generating a supporting point identification area, guiding a product to be tested to be placed on a test platform of a tester by voice, wherein the position of the product to be tested is satisfied that at least one supporting point is in the supporting point identification area, and the geometric center of the product to be tested is in the primary calibration area;
the probe moves to a position where the geometric center of the probe coincides with the geometric center of the product to be tested on the testing machine;
According to the probe and the product to be tested, determining an optimal test distance, determining an optimal test angle, lifting the test platform to a preset height, horizontally rotating the test platform by the optimal test angle, and enabling the preset height to be equal to the optimal test distance between the probe and the product to be tested.
2. The method of claim 1, wherein said calculating the geometric center of the probe comprises the steps of:
Scanning to obtain a first boundary curve of the inner side edge of the probe, and scanning to obtain a second boundary curve of the outer side edge of the probe;
generating a first boundary curve and a second boundary curve in the same coordinate system;
Uniformly taking at least one first identification point along the first boundary curve, and obtaining a first fitting function of the first identification point according to the coordinates of the first identification point;
uniformly taking at least one second identification point along a second boundary curve, and obtaining a second fitting function of the second identification point according to the coordinates of the second identification point;
Calculating coordinates of the geometric center of the probe by using a geometric center formula;
The geometric center formula is as follows:
;
The integral region is a region surrounded by the first fitting function and the first fitting function, V is the area of the integral region, X is the abscissa of the geometric center of the probe, Y is the ordinate of the geometric center of the probe, and (X, Y) is the coordinates of points in the integral region.
3. The method of claim 2, wherein the step of obtaining the movement range of the geometric center of the probe comprises the steps of:
And taking the initial coordinate of the geometric center of the probe as a circle center, taking a preset distance as a radius, and taking the identification circle as the moving range of the geometric center of the probe.
4. A method according to claim 3, wherein said calculating the geometric center of the product to be tested comprises the steps of:
Scanning to obtain a first edge curve of the inner side edge of the product to be tested, and scanning to obtain a second edge curve of the outer side edge of the product to be tested;
Generating a first edge curve and a second edge curve in the same coordinate system;
Uniformly taking at least one first fitting point along the first edge curve, and obtaining a first approximation function of the first fitting point according to the coordinates of the first fitting point;
Uniformly taking at least one second fitting point along the second edge curve, and obtaining a second approximation function of the second fitting point according to the coordinates of the second fitting point;
Calculating the coordinates of the geometric center of the product to be tested by using a geometric center formula;
The geometric center formula is as follows:
;
the integration area is an area surrounded by the first approximation function and the first approximation function, W is the area of the integration area, Z is the abscissa of the geometric center of the product to be tested, R is the ordinate of the geometric center of the product to be tested, and (x, y) is the coordinate of a point in the integration area.
5. The method of claim 4, wherein said calculating at least one support point for the product to be tested comprises the steps of:
Obtaining a marginal curve of a product to be tested, uniformly selecting at least one marginal point along the marginal curve, and passing the marginal point to make a tangent line;
And (3) taking the crossing boundary point as a normal line perpendicular to the corresponding tangent line, wherein the length of the normal line is d, checking whether a region formed by connecting the endpoints of the normal line positioned in the boundary curve can be contained by the supporting point identification region, if so, taking at least one endpoint as at least one supporting point, and if not, taking r as the amplitude to increase the length of the normal line.
6. The flying probe tester testing method according to claim 5, wherein said generating the primary calibration area comprises the steps of:
a calibration circle is arbitrarily defined, which is included in the movement range of the geometric center of the probe, and is taken as a primary calibration area.
7. A test method of a flying probe tester according to claim 6, the method is characterized by comprising the following steps of:
scanning the edge of the test platform, and taking the area surrounded by the edge of the test platform as a supporting point identification area.
8. The method of claim 7, wherein moving the probe on the tester to a position where the geometric center of the probe coincides with the geometric center of the product to be tested comprises the steps of:
acquiring the coordinates of the geometric center of the probe, and acquiring the coordinates of the geometric center of the product to be tested;
According to the coordinates of the two, calculating the motion vector of the geometric center of the probe ;
And respectively moving the coordinates e units of the geometric center of the probe transversely and moving the coordinates f units of the geometric center of the probe longitudinally according to the directions of the components of the motion vector in the transverse direction or the longitudinal direction.
9. The method of claim 8, wherein said determining the optimal test distance comprises the steps of:
the test platform slowly rises from the lowest point, an inductor is arranged on the test machine, the inductor measures an induction electric field generated by induction current in the product to be tested, and the induction current is positively correlated with the test current of the product to be tested;
When the induced current is high and starts to decline, taking the height of the corresponding test platform at the high point of the induced current as the optimal test distance;
determining the optimal test angle comprises the steps of:
the test platform is slow, an inductor is arranged on the test machine, the inductor measures an induction electric field generated by induction current in the product to be tested, and the induction current is positively correlated with the test current of the product to be tested;
When the induced current is high and starts to decline, the rotation angle of the corresponding test platform at the high point of the induced current is taken as the optimal test angle.
10. A flying probe tester test system for implementing a flying probe tester test method according to any one of claims 1-9, comprising:
The center calculating module is used for calculating and obtaining the geometric center of the probe and calculating and obtaining the geometric center of the product to be tested;
the scanning module is used for scanning the product to be tested;
The range estimation module is used for acquiring the moving range of the geometric center of the probe;
The primary calibration module is used for guiding the product to be tested to be placed on a test platform of the tester, the position of the product to be tested is satisfied that at least one supporting point is in a supporting point identification area, and the geometric center of the product to be tested is in the primary calibration area;
The secondary calibration module is used for controlling the probe to move to a position where the geometric center of the probe coincides with the geometric center of the product to be tested in the testing machine, controlling the testing platform to rise and fall to a preset height, and controlling the testing platform to horizontally rotate by an optimal testing angle;
The identification area module is used for generating a primary calibration area and a supporting point identification area;
and the voice guidance module is used for sending out voice guidance.
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| CN101515016A (en) * | 2008-02-22 | 2009-08-26 | 东京毅力科创株式会社 | Detection device, detection method, and storage medium |
| CN104914375A (en) * | 2015-05-11 | 2015-09-16 | 南京协辰电子科技有限公司 | Error correction method of flying probe tester |
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| KR102449983B1 (en) * | 2020-10-28 | 2022-10-04 | 주식회사 에머릭스 | Printed assembly circuit board assembly inspection device |
| CN114441942B (en) * | 2022-01-28 | 2023-10-03 | 苏州格拉尼视觉科技有限公司 | Flying probe testing method, system and equipment for PCB and storage medium |
| CN115598577A (en) * | 2022-09-26 | 2023-01-13 | 国营芜湖机械厂（Cn） | Flying probe deviation testing device and method and flying probe testing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101515016A (en) * | 2008-02-22 | 2009-08-26 | 东京毅力科创株式会社 | Detection device, detection method, and storage medium |
| CN104914375A (en) * | 2015-05-11 | 2015-09-16 | 南京协辰电子科技有限公司 | Error correction method of flying probe tester |
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