TWI447349B - System and method for authenticating a probe - Google Patents

Description

Probe verification system and method

The present invention relates to a probe verification system and method.

In recent years, with the improvement of computer hardware performance and the reduction of price, the three-coordinate measuring machine has been widely used as a measuring device for product measurement in industry and scientific research. Specifically, the measuring device is mainly used for measuring dimensional error and shape error of parts or components, and plays an important role in ensuring product quality.

The probe is part of a three-coordinate measuring machine that includes a measuring rod and a probe at the bottom end of the measuring rod, which can be made of a ruby material. When the probe's probe touches the surface of the part or part, the probe sends a touch signal, and the raster counter in the counting system counts the generated touch signal and transmits it to the computer. The computer obtains the coordinates of the contact point in three-dimensional space through the internally installed measuring software. The coordinates of each contact point are actually the spherical coordinates of the probe when the probe moves on the surface of the part or component. The coordinate is different from the true coordinate of the contact point by the radius of the probe. For example, when the radius of the probe is r The probe collides with the surface of the part or component along the X-axis. When the measured contact point is X0 on the X-axis, the actual coordinate of the contact point on the X-axis is (X0-r). In order to accurately calculate the actual coordinates of the contact point, it is necessary to accurately know the radius of the probe to determine whether the probe is qualified. If the probe fails, it will greatly affect the test accuracy of the part or component.

In view of the above, it is necessary to provide a probe verification system and method for calculating the radius of the probe by obtaining the actual coordinates of the contact point to verify whether the probe is qualified, reducing the error caused by the probe failure, and improving the test accuracy. .

A probe verification system includes a probe at the bottom end of the measuring rod, the system comprising: a setting module for setting a verification parameter, the verification parameter including a radius of the verification ball, a number of theoretical contact points, and a probe The theoretical radius and the tolerance range of the actual radius of the probe and the theoretical radius of the probe; the analog module is used when the user randomly selects a point above the verification ball as the contact point, so that the probe touches the point, according to Simulating a virtual sphere with the radius of the verification ball, and calculating a centroid coordinate of the virtual sphere; calculating a module for calculating a coordinate of the theoretical contact point on the virtual sphere according to a center coordinate of the virtual sphere; acquiring a module Obtaining a coordinate of an actual contact point through a coordinate of a theoretical contact point on the virtual ball, the actual contact point coordinate being a first actual contact point coordinate; the computing module is further configured to pass the first actual The coordinates of the contact point calculate the center coordinates of the verification ball, and calculate the theoretical contact point coordinates on the verification ball according to the coordinates of the center of the verification ball; the acquisition module is also used for the inspection The coordinates of the theoretical contact point on the ball acquire the coordinates of the actual contact point, the actual contact point coordinates are the second actual contact point coordinates; the calculation module is also used to calculate the coordinates of the second actual contact point The actual radius of the ball; the judging module is configured to judge whether the tolerance between the actual radius of the calculated ball and the theoretical radius of the ball is within the set tolerance range, and verify whether the probe is qualified according to the judgment result. An identification module for identifying the above verification result.

A probe verification method, the probe includes a probe at the bottom end of the rod, the method comprising the steps of: setting a verification parameter including verifying a radius of the sphere, a number of theoretical contact points, a theoretical radius of the probe, and exploration When the needle passes, the actual radius of the ball and the theoretical radius of the ball are within the tolerance range; when the user randomly selects a point above the verification ball as the contact point, the probe touches the point, and simulates a virtual ball according to the radius of the point and the verification ball. And calculating a centroid coordinate of the virtual sphere; calculating a coordinate of the theoretical contact point on the virtual sphere according to a center coordinate of the virtual sphere; obtaining a coordinate of the actual contact point through a coordinate of a theoretical contact point on the virtual sphere, the actual The coordinates of the contact point are the first actual contact point coordinates; the coordinates of the center of the ball are calculated by the coordinates of the first actual contact point, and the coordinates of the theoretical contact point on the verification ball are calculated according to the coordinates of the center of the verification ball; The coordinates of the theoretical contact point acquire the coordinates of the actual contact point, and the actual contact point coordinates are the coordinates of the second actual contact point; Calculating the actual radius of the ball for the second actual contact point; determining whether the tolerance between the calculated actual radius of the ball and the theoretical radius of the ball is within the set tolerance range, and verifying according to the judgment result Whether the probe is qualified; identifies the above verification result.

Compared with the prior art, the probe verification system and method calculate the radius of the probe by obtaining the actual coordinates of the contact point to verify whether the probe is qualified, and reduce the error caused by the probe failure, thereby improving the error. Test accuracy saves the company's testing costs.

Referring to Figure 1, there is shown an architectural diagram of a preferred embodiment of the probe verification system of the present invention. The system mainly includes a host computer 9, and an image measuring machine 1, a display device 7, and an input device 8 connected to the host 9. The host 9 includes a probe verification system (hereinafter referred to as "verification system") 90.

The composition of the image measuring machine 1 is as shown in FIG. 2. The image measuring machine 1 includes a table 2 parallel to the horizontal plane, a gantry 3 straddles the table 2, and is fixed to the gantry. The top cover 4 in the middle of the frame 3, the probe 5 and the verification ball 6 placed on the table 2. The probe 5 includes a measuring rod 51 and a probe 50 at the bottom end of the measuring rod 51, as shown in FIG.

The image measuring machine 1 is further provided with an X-axis transmission system, a Y-axis transmission system and a Z-axis transmission system (not shown). The X-axis transmission system, the Y-axis transmission system and the Z-axis transmission system are configured to drive the probe ball 50 to move along the X-axis, the Y-axis and the Z-axis of the mechanical coordinate for contacting the verification ball 6 to obtain the verification. The coordinates of each contact point on the ball 6. Specifically, when the probe 50 is in contact with the verification ball 6, the image measuring machine 1 can measure the coordinates of each contact point on the verification ball 6 using an internally mounted measurement software (not shown). In this embodiment, the coordinates of each contact point are the theoretical coordinates of the contact point, which is actually the coordinate of the spherical center O1 of the probe 50 when the probe 50 is in contact with the verification ball 6. The verification system 90 can verify the inspection of the ball 50 based on the theoretical coordinates of each of the contact points.

The display device 7 is used to display coordinate data and the like transmitted by the image measuring machine 1 to the host 9. The input device 8 may be a keyboard, a mouse, or the like for performing data registration, for example, setting the number of theoretical contact points, the radius of the input verification ball 6, the theoretical radius of the probe 50, and the radius of the probe 50. Range, etc.

The verification system 90 includes a plurality of function modules: a setup module 910, an analog module 920, a calculation module 930, an acquisition module 940, a determination module 950, and an identification module 960. The module referred to in the present invention is a computer program segment for performing a specific function, and is more suitable for describing the execution process of the software in the computer than the program. Therefore, the following description of the software in the present invention is described by a module.

The setting module 910 is configured to set a verification parameter. The verification parameters include, but are not limited to, the radius of the verification ball 6, the number of theoretical contact points, the theoretical radius of the probe 50, and the actual radius of the probe 50 when the probe 5 passes and the theoretical radius of the probe 50. range. Specifically, the radius r of the verification ball 6 is fixed, and the theoretical radius of the probe 50 is also fixed, and the number of theoretical contact points can be set according to the needs of the user. Whether the actual radius of the probe 50 is qualified can be verified by the set verification parameter, thereby verifying whether the probe 5 is qualified.

In general, the more the number of theoretical contact points is set, the larger the calculation amount, and the more accurate the verification result. In the preferred embodiment, the number of theoretical contact points is at least four and at most 20. The theoretical contact point refers to the point at which the probe 50 is expected to be in contact with the verification ball 6 during verification. The distribution of the theoretical contact points on the verification sphere 6 can be determined by the number of theoretical contact points and the distribution rules, which are set by the user in advance through the setting module 910. For example, as shown in FIG. 4, the upper surface of the verification ball 6 is divided into three layers in an equally spaced manner. The first layer is the center circle of the verification ball 6, and the center circle is distributed with 3 to 10 theoretical contact points. The second layer is a circle of two-thirds of the upper surface of the verification ball 6, on which 0 to 6 theoretical contact points are distributed, and the third layer is a circle at the third of the upper surface of the verification ball 6, which 0~3 theoretical contact points are distributed on the circle. Regardless of how many theoretical contact points are set by the module 910, one of the theoretical contact points is directly above the verification ball 6, as at the point "a", other theoretical contact points are preferentially distributed on the first layer, when When the number of first layer distributions reaches 10 and there are also theoretical contact points that are not distributed, consider the second layer, and so on. For example, if the setting module 910 is provided with 20 theoretical contact points, a theoretical contact point is distributed directly above the verification ball 6 as the point "a", and the first layer of the verification ball 6 is distributed with 10 theoretical contact points. The second layer will distribute six theoretical contact points, and the third layer will distribute three theoretical contact points. If the set module 910 is provided with 10 theoretical contact points, the other 9 theoretical contact points will be distributed on the first layer after a theoretical contact point is distributed at the point "a" directly above the verification ball 6.

The simulation module 920 is configured to randomly select a point above the verification ball 6 as a contact point, so that the probe 50 contacts the point, simulate a virtual ball according to the radius of the point and the verification ball 6, and calculate the virtual ball. The center of the circle. In the preferred embodiment, the arbitrarily selected point is the vertex of the verification ball 6, as shown by the point P0 in FIG. However, due to the human error, there is an error between the selected point and the actual vertex P0 of the verification ball 6, such as the contact point P0' shown in FIG. Therefore, in the present embodiment, the arbitrarily selected point, such as the contact point P0', is used as the vertex of the verification ball 6, and a virtual ball is simulated, which is the same size as the verification ball 6. Assuming that the radius of the verification ball 6 is r, the coordinates of the contact point P0' are (X0', Y0', Z0'), and the coordinates of the center O' of the virtual sphere and the vertex P0' differ by the radius r on the Z-axis, that is, The coordinates of O' are (X0', Y0', Z0'-r).

The calculation module 930 is configured to calculate a coordinate of the theoretical contact point on the virtual ball according to a coordinate of a center O′ of the virtual ball. The coordinates of the theoretical contact point on the virtual sphere can be obtained as follows:

Xi'=X0'+cos(i*a)*r;

Yi'=Y0'+sin(i*a)*r;

Zi'=Z axis coordinate of the current layer;

Where a=360/N, i<=N, N is the number of theoretical contact points of the current layer (the number of theoretical contact points on the first layer as described in FIG. 4), and N is not equal to zero.

The acquisition module 940 is configured to acquire the coordinates of the actual contact point (ie, the first actual contact point described below) through the coordinates of the theoretical contact point on the virtual ball. Specifically, assuming that there are five theoretical contact points on the virtual sphere, there are four theoretical contact points P1', P2', P3', and P4' on the first layer (ie, the center circle) of the virtual sphere, and the vertex P0' There is a theoretical contact point. The probe 50 touches the points P0', P1', P2', P3' and P4' according to the coordinates of P0', P1', P2', P3' and P4', respectively, because P0', P1' P2', P3', and P4' are points on the virtual sphere. Therefore, the point actually touched by the probe 50 when simulating the theoretical contact point is the point on the verification ball 6. In this embodiment, The point actually encountered is called the first actual contact point. Specifically, taking the theoretical contact point P1' of the virtual ball as an example, as shown in FIG. 6, the probe ball 50 is horizontally moved to the right to contact the point P1'. Since the theoretical contact point P1' does not actually exist, the probe 50 is not present. After the point P1', it will contact with the point P1 on the verification ball 6, which is the first actual contact point, and the coordinates of the theoretical contact point P1' can acquire the first actual contact point P1. coordinate. Similarly, the coordinates of the other first actual contact points on the verification ball 6 can be obtained from the coordinates of the other theoretical contact points described above.

The calculation module 930 is further configured to calculate the center coordinates of the ball 6 through the coordinates of the first actual contact point. In the preferred embodiment, the center coordinates of the verification ball 6 can be calculated by using the coordinates of the first actual contact point by fitting the ball formula and the Newton iteration formula, wherein the fitting sphere formula and the Newton iteration formula are The specific calculation process of the prior art is not described here.

The calculation module 930 is further configured to calculate the theoretical contact point coordinates on the verification ball 6 according to the center coordinates of the verification ball 6. The coordinates of the theoretical contact point on the verification ball 6 can be obtained by assuming that the coordinates of the center O of the verification ball 6 calculated above are (X0, Y0, Z0), and the coordinates of the theoretical contact point on the verification ball 6 are :

Xi=X0+cos(i*a)*r;

Yi=Y0+sin(i*a)*r;

Zi=Z axis coordinate of the current layer;

Where a=360/N, i<=N, N is the number of theoretical contact points of the current layer, and N is not equal to zero.

The acquisition module 940 is further configured to obtain the coordinates of the actual contact point through the coordinates of the theoretical contact point on the verification ball 6, where the coordinates of the actual contact point are the second actual contact point coordinates. Specifically, taking the coordinate of one of the actual contact points P11 as an example, as shown in FIG. 7, the probe 50 moves horizontally to the right to contact the theoretical contact point P11 on the verification ball 6, by the verification ball 6 The coordinates of the center O are (X0, Y0, Z0) and the radius r of the verification ball 6 can obtain the coordinates of the second actual contact point. It should be noted that due to the error, the second actual contact point may be the point P11 or the point P11.

The calculation module 930 is configured to calculate the actual radius of the probe 50 through the coordinates of the second actual contact point. In the preferred embodiment, the actual radius of the probe 50 can be calculated from the coordinates of the center of the probe 50, and the coordinates of the center of the probe 50 can be derived from the coordinates of the second actual contact point, the fit ball formula, and Newton. The iterative formula is calculated. Specifically, the coordinates of the second actual contact point are substituted into the fitting sphere formula and the Newton iteration formula to obtain a radius R of the fitting sphere, and the radius R of the fitting sphere is equal to the radius r of the verification sphere 6 and the exploration The sum of the actual radii r1 of the ball 50, that is, the actual radius of the ball 50 is r1 = Rr.

The determining module 950 is configured to determine whether the calculated radius of the probe 50 is qualified to verify whether the probe 5 is qualified. Specifically, when the calculated range of the actual radius of the probe 50 and the theoretical radius of the probe 50 set by the user is within a set tolerance range (for example, 0.01 mm to 0.05 mm), the shot 50 is qualified. The verification result is that the probe 5 is qualified. When the calculated tolerance range of the actual radius of the probe 50 and the theoretical radius of the probe 50 set by the user is not within the set tolerance range, it indicates that the probe 50 is unqualified, and the verification result is that the probe 5 is unqualified.

The identification module 960 is configured to identify the verification result. Specifically, when the verification result is that the probe 5 is qualified, the identification module 960 displays the symbol “SUCCESS” on the display device 7; when the verification result is that the probe 5 fails, the identification module 960 displays on the display device 7. The symbol "FAIL" indicates that the probe 50 needs to be replaced.

As shown in Figure 8, a flow chart of a preferred embodiment of the probe verification method of the present invention is shown.

In step S10, the setting module 910 sets the verification parameter. The verification parameters include, but are not limited to, the radius of the verification ball 6, the number of theoretical contact points, the theoretical radius of the probe 50, and the actual radius of the probe 50 when the probe 5 passes and the theoretical radius of the probe 50. range. Specifically, the radius r of the verification ball 6 is fixed, and the theoretical radius of the probe ball 50 is also fixed, and the number of the theoretical contact points can be set according to the needs of the user. Through the set verification parameters, it can be verified whether the actual radius of the probe 50 is qualified, thereby verifying whether the probe 5 is qualified. In general, the more the number of theoretical contact points is set, the larger the calculation amount, and the more accurate the verification result. In the preferred embodiment, the number of theoretical contact points is at least four and at most 20. The theoretical contact point refers to the point at which the probe 50 is expected to be in contact with the verification ball 6 during verification. The distribution of the theoretical contact points on the verification ball 6 can be determined by the number of theoretical contact points and the distribution rules. The distribution rules are set by the user through the setting module 910 in advance, and the specific distribution rules are set as shown in FIG. 4 .

In step S11, when the user randomly selects a point above the verification ball 6 as a contact point to make the probe 50 contact the point, the simulation module 920 simulates a virtual ball according to the radius of the point and the verification ball 6, and calculates the virtual ball. The center of the circle. In the preferred embodiment, the arbitrarily selected point is the vertex of the verification ball 6, as shown by the point P0 in FIG. However, due to the human error, there is an error between the selected point and the actual vertex P0 of the verification ball 6, such as the contact point P0' shown in FIG. Therefore, in the present embodiment, the arbitrarily selected point, such as the contact point P0', is used as the vertex of the verification ball 6, simulating a virtual ball, which is the same size as the verification ball 6. Assuming that the radius of the verification ball 6 is r, the coordinates of the contact point P0' are (X0', Y0', Z0'), and the coordinates of the center O' of the virtual sphere and the vertex P0' differ by the radius r on the Z-axis, that is, The coordinates of O' are (X0', Y0', Z0'-r).

In step S12, the calculation module 930 calculates the coordinates of the theoretical contact point on the virtual sphere according to the coordinates of the center O' of the virtual sphere. The coordinates of the theoretical contact point on the virtual sphere can be obtained as follows:

Xi'=X0'+cos(i*a)*r;

Yi'=Y0'+sin(i*a)*r;

Zi'=Z axis coordinate of the current layer;

Where a=360/N, i<=N, N is the number of theoretical contact points of the current layer (the number of theoretical contact points on the first layer as described in FIG. 4), and N is not equal to zero.

In step S13, the acquisition module 940 acquires the coordinates of the actual contact point (ie, the first actual contact point described below) through the coordinates of the theoretical contact point on the virtual sphere. Specifically, assuming that there are five theoretical contact points on the virtual sphere, there are four theoretical contact points P1', P2', P3', and P4' on the first layer (ie, the center circle) of the virtual sphere, and the vertex P0' There is a theoretical contact point. The probe 50 touches the points P0', P1', P2', P3' and P4' according to the coordinates of P0', P1', P2', P3' and P4', respectively, because P0', P1' P2', P3', and P4' are points on the virtual sphere. Therefore, the point actually touched by the probe 50 when simulating the theoretical contact point is the point on the verification ball 6. In this embodiment, The point actually encountered is called the first actual contact point. Specifically, taking the theoretical contact point P1' of the virtual ball as an example, as shown in FIG. 6, the probe ball 50 is horizontally moved to the right to contact the point P1'. Since the theoretical contact point P1' does not actually exist, the probe 50 is not present. After the point P1', it will contact with the point P1 on the verification ball 6, which is the first actual contact point, and the coordinates of the theoretical contact point P1' can acquire the first actual contact point P1. coordinate. Similarly, the coordinates of the other first actual contact points on the verification ball 6 can be obtained from the coordinates of the other theoretical contact points described above.

In step S14, the calculation module 930 calculates the center coordinates of the verification ball 6 through the coordinate of the first actual contact point. In the preferred embodiment, the center coordinates of the verification ball 6 can be calculated by using the coordinates of the first actual contact point by fitting the ball formula and the Newton iteration formula, wherein the fitting sphere formula and the Newton iteration formula are The specific calculation process of the prior art is not described here.

In step S15, the calculation module 930 calculates the theoretical contact point coordinates on the verification ball 6 based on the coordinates of the center of the verification ball 6. The coordinates of the theoretical contact point on the verification ball 6 can be obtained by assuming that the coordinates of the center O of the verification ball 6 calculated above are (X0, Y0, Z0), and the coordinates of the theoretical contact point on the verification ball 6 are :

Xi=X0+cos(i*a)*r;

Yi=Y0+sin(i*a)*r;

Zi=Z axis coordinate of the current layer;

Where a=360/N, i<=N, N is the number of theoretical contact points of the current layer, and N is not equal to zero.

In step S16, the acquisition module 940 obtains the coordinates of the actual contact point through the coordinates of the theoretical contact point on the verification ball 6, and the coordinates of the actual contact point at this time are the coordinates of the second actual contact point. Specifically, taking the coordinate of one of the actual contact points P11 as an example, as shown in FIG. 7, the probe 50 moves horizontally to the right to contact the theoretical contact point P11 on the verification ball 6, by the verification ball 6 The coordinates of the center O are (X0, Y0, Z0) and the radius r of the verification ball 6 can obtain the coordinates of the second actual contact point. It should be noted that due to the error, the second actual contact point may be the point P11 or the point P11.

In step S17, the calculation module 930 calculates the actual radius of the probe 50 through the coordinates of the second actual contact point. In the preferred embodiment, the actual radius of the probe 50 can be calculated from the coordinates of the center of the probe 50, and the coordinates of the center of the probe 50 can be derived from the coordinates of the second actual contact point, the fit ball formula, and Newton. The iterative formula is calculated. Specifically, the coordinates of the second actual contact point are substituted into the fitting sphere formula and the Newton iteration formula to obtain a radius R of the fitting sphere, and the radius R of the fitting sphere is equal to the radius r of the verification sphere 6 and the exploration The sum of the actual radii r1 of the ball 50, therefore, the actual radius of the probe 50 is r1 = Rr.

In step S18, the determining module 950 determines whether the calculated actual radius of the probe 50 is qualified to verify whether the probe 5 is qualified. Specifically, when the calculated range of the actual radius of the probe 50 and the theoretical radius of the probe 50 set by the user is within a set tolerance range (for example, 0.01 mm to 0.05 mm), the shot 50 is qualified. The flow proceeds to step S19. When the calculated tolerance range of the actual radius of the probe 50 and the theoretical radius of the probe 50 set by the user is not within the set tolerance range, it indicates that the probe 50 is unqualified, and the flow proceeds to step S20.

In step S19, the verification result is that the probe 5 is qualified, and the identification module 960 displays the symbol "SUCCESS" on the display device 7.

In step S20, the verification result is that the probe 5 is unqualified, and the identification module 960 displays the symbol "FAIL" on the display device 7.

The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments thereof, and those skilled in the art should understand that the technical solutions of the present invention may be modified or substituted. Neither should the spirit and scope of the technical solutions of the present invention be deviated.

1‧‧‧Image measuring machine

2‧‧‧Workbench

3‧‧‧ gantry

4‧‧‧ top cover

5‧‧‧ probe

50‧‧‧Check the ball

51‧‧‧ rod

6‧‧‧ verification ball

7‧‧‧Display equipment

8‧‧‧Input equipment

9‧‧‧Host

90‧‧‧Probe verification system

910‧‧‧Setup module

920‧‧‧simulation module

930‧‧‧Computation Module

940‧‧‧Getting module

950‧‧‧Judgement module

960‧‧‧identification module

S10‧‧‧Set the verification parameters required for verification

S11‧‧‧ Select a point above the verification ball, simulate a virtual ball according to the point and the set verification parameters, and calculate the center coordinates of the virtual ball.

S12‧‧‧ Calculate the coordinates of each theoretical contact point on the virtual sphere based on the coordinates of the center of the virtual sphere

S13‧‧·Get the coordinates of the first actual contact point through the coordinates of each theoretical contact point on the virtual ball

S14‧‧‧ Calculate the center coordinates of the ball through the coordinates of the first actual contact point

S15‧‧‧ Calculate the coordinates of each theoretical contact point on the verification ball by verifying the center coordinates of the ball

S16‧‧‧Get the coordinates of the second actual contact point by verifying the coordinates of each theoretical contact point on the ball

S17‧‧‧ Calculate the actual radius of the ball through the coordinates of the second actual contact point

S18‧‧‧Determining whether the radius of the ball is qualified

S19‧‧‧ probe qualified

S20‧‧‧ probe failed

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram of a preferred embodiment of the probe verification system of the present invention.

Fig. 2 is a schematic structural view of an image measuring machine.

Figure 3 is a schematic view showing the structure of the probe of the present invention.

Figure 4 is a schematic illustration of the distribution of theoretical contact points of the present invention.

FIG. 5 is a schematic diagram of the virtual ball simulated by the probe of the present invention after arbitrarily selecting a point above the verification ball.

Figure 6 is a schematic illustration of the coordinates of the first actual contact point taken by the probe of the present invention.

Figure 7 is a schematic illustration of the coordinates of the probe of the present invention for obtaining a second actual contact point.

Figure 8 is a flow chart of a preferred embodiment of the probe verification method of the present invention.

S10‧‧‧Set the verification parameters required for verification

S11‧‧‧ Select a point above the verification ball, simulate a virtual ball according to the point and the set verification parameters, and calculate the center coordinates of the virtual ball.

S12‧‧‧ Calculate the coordinates of each theoretical contact point on the virtual sphere based on the coordinates of the center of the virtual sphere

S13‧‧·Get the coordinates of the first actual contact point through the coordinates of each theoretical contact point on the virtual ball

S14‧‧‧ Calculate the center coordinates of the ball through the coordinates of the first actual contact point

S15‧‧‧ Calculate the coordinates of each theoretical contact point on the verification ball by verifying the center coordinates of the ball

S16‧‧‧Get the coordinates of the second actual contact point by verifying the coordinates of each theoretical contact point on the ball

S17‧‧‧ Calculate the actual radius of the ball through the coordinates of the second actual contact point

S18‧‧‧Determining whether the radius of the ball is qualified

S19‧‧‧ probe qualified

S20‧‧‧ probe failed

Claims (10)

A probe verification system includes a probe at the bottom end of the rod, the system comprising:
a setting module, configured to set a verification parameter, the verification parameter includes a radius of the verification ball, a number of theoretical contact points, a theoretical radius of the probe ball, and a tolerance range of the actual radius of the probe ball and the theoretical radius of the probe ball when the probe passes the test ;
The simulation module is configured to randomly select a point above the verification ball as a contact point, so that the probe touches the point, simulate a virtual ball according to the radius of the point and the verification ball, and calculate a center coordinate of the virtual ball;
a calculation module, configured to calculate a coordinate of the theoretical contact point on the virtual ball according to a center coordinate of the virtual ball;
Obtaining a module, configured to obtain a coordinate of an actual contact point through a coordinate of a theoretical contact point on the virtual ball, where the coordinate of the actual contact point is a coordinate of the first actual contact point;
The calculation module is further configured to calculate a center coordinate of the verification ball through a coordinate of the first actual contact point, and calculate a coordinate of the theoretical contact point on the verification ball according to a center coordinate of the verification ball;
The acquiring module is further configured to obtain a coordinate of the actual contact point by using a coordinate of the theoretical contact point on the verification ball, where the coordinate of the actual contact point is a coordinate of the second actual contact point;
The calculation module is further configured to calculate an actual radius of the probe through the coordinates of the second actual contact point;
a judging module, configured to determine whether a tolerance between the actual radius of the calculated probe ball and the theoretical radius of the probe ball is within the set tolerance range, and verify whether the probe is qualified according to the judgment result; and the identification module, Used to identify the above verification results. The probe verification system of claim 1, wherein when the verification result is that the probe is qualified, the identification module displays the character “SUCCESS”, and when the verification result is that the probe fails, The identification module displays the character "FAIL". The probe verification system of claim 1, wherein the number of the theoretical contact points is set between four and twenty. The probe verification system according to claim 1, wherein the center point of the virtual sphere is calculated by fitting a ball formula and a Newton iteration formula. The probe verification system of claim 1, wherein the actual radius of the probe is calculated by fitting a ball formula and a Newton iteration formula. A probe verification method includes a probe at the bottom end of a rod, the method comprising the steps of:
Setting a verification parameter, the verification parameter includes a radius of the verification ball, a number of theoretical contact points, a theoretical radius of the probe, and a tolerance range of the actual radius of the probe and the theoretical radius of the probe when the probe passes;
When the user randomly selects a point above the verification ball as a contact point, the probe touches the point, simulates a virtual ball according to the radius of the point and the verification ball, and calculates a centroid coordinate of the virtual ball;
Calculating a coordinate of the theoretical contact point on the virtual ball according to a center coordinate of the virtual ball;
Acquiring the coordinates of the actual contact point through the coordinates of the theoretical contact point on the virtual ball, the actual contact point coordinates being the coordinates of the first actual contact point;
Verifying the center coordinates of the ball through the coordinate of the first actual contact point, and calculating the coordinates of the theoretical contact point on the ball according to the coordinates of the center of the verification ball;
Acquiring the coordinates of the actual contact point by verifying the coordinates of the theoretical contact point on the ball, the coordinates of the actual contact point being the coordinates of the second actual contact point;
Calculating the actual radius of the probe through the coordinates of the second actual contact point;
Determining whether the tolerance between the actual radius of the calculated ball and the theoretical radius of the ball is within the set tolerance range, verifying whether the probe is qualified according to the judgment result; and identifying the verification result. The probe verification method according to claim 6, wherein the step of identifying the verification result includes:
If the verification result is that the probe is qualified, the character "SUCCESS" is displayed;
If the verification result is that the probe fails, the character "FAIL" is displayed. The probe verification method according to claim 6, wherein the number of the theoretical contact points is set between four and twenty. The probe verification method according to claim 6, wherein the center point of the virtual sphere is calculated by fitting a ball formula and a Newton iteration formula. The probe verification method according to claim 6, wherein the actual radius of the probe is calculated by fitting a ball formula and a Newton iteration formula.