CN114323946A - Method and device for automatically testing tension of gold bonding wire and computer equipment - Google Patents
Method and device for automatically testing tension of gold bonding wire and computer equipment Download PDFInfo
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Abstract
The application relates to the technical field of gold bonding wires, and discloses a method, a device and computer equipment for automatically testing the tension of the gold bonding wire, wherein the integral displacement distance of the gold bonding wire at a plurality of preset moments is obtained, so that the moving acceleration of the gold bonding wire can be calculated according to the integral displacement distance, whether the acceleration is zero or not is judged, if the acceleration is zero, the gold bonding wire is represented to move to a fixed position in tension testing equipment, first length information and first tension information of the gold bonding wire are obtained, whether the gold bonding wire is broken or not is judged according to the first length information and the first tension information, if the gold bonding wire is broken, the breaking tension value during breaking is obtained, and whether the tension of the gold bonding wire is qualified or not can be judged according to the integral length value and the breaking tension value of the broken gold bonding wire; therefore, the tension test equipment can automatically complete the tension test of the gold bonding wire without manual observation, and the working efficiency of the tension test is improved.
Description
Technical Field
The application relates to the technical field of gold bonding wires, in particular to a method and a device for automatically testing the tension of a gold bonding wire and computer equipment.
Background
The gold bonding wire is a wire with gold content more than 99.99%, has stable performance, is used for connecting a chip and an external frame, establishes a bridge between semiconductors, is one of main materials for packaging the semiconductors and the LEDs, has optimal reliability, is mostly used on high-end and high-price products, has extremely high value, and has relatively complex production process. For example, during the tensile test of the bonding wire, manual start-up or shut-down of the tensile test equipment is required, and during the test, whether the current bonding wire is qualified or not is also required to be manually detected, which undoubtedly makes the tensile test of the bonding wire time-consuming and inefficient.
Disclosure of Invention
The main purpose of the present application is to provide a method for automatically testing the tension of a gold bonding wire, which aims to solve the technical problems of long time consumption and low efficiency in the tension test of the gold bonding wire in the prior art.
The application provides a method for automatically testing tension of a gold bonding wire, which is applied to tension testing equipment and comprises the following steps:
acquiring the integral displacement distance of the gold bonding wire at a preset moment, and calculating the moving acceleration of the gold bonding wire according to the integral displacement distance;
judging whether the acceleration is zero or not;
if the acceleration is zero, determining that the gold bonding wire moves to a fixed position in the tensile testing equipment;
acquiring first length information and first tension information of a gold bonding wire, and judging whether the gold bonding wire is broken or not according to the first length information and the first tension information;
and if the bonding gold wire is broken, acquiring a breaking tension value during breakage, and judging whether the tension detection of the bonding gold wire is qualified or not according to the breaking tension value during breakage so as to finish the tension automatic test of the bonding gold wire.
Preferably, before the step of obtaining the overall displacement distance of the gold bonding wire at the preset time, the method further includes:
acquiring a pressure value of a pressure sensor;
judging whether the pressure value is greater than a first preset value or not;
and if the pressure value is greater than a first preset value, judging that the gold bonding wire is placed in the tension test equipment.
Preferably, the step of acquiring a total displacement distance of the gold bonding wire at a preset time and calculating an acceleration of the movement of the gold bonding wire according to the total displacement distance includes:
acquiring a first integral displacement distance of the gold bonding wire along the X-axis direction at a first preset moment and a second integral displacement distance of the gold bonding wire along the X-axis direction at a second preset moment;
calculating a first displacement difference between the second global displacement distance and the first global displacement distance;
calculating a first average speed value according to the first displacement difference value, wherein the calculation formula is as follows:
wherein V1 represents a first average speed value, S1 represents a first displacement difference value, T2 represents a second preset time, and T1 represents a first preset time;
acquiring a third integral displacement distance along the X-axis direction at a third preset moment;
calculating a second displacement difference between the third global displacement distance and the second global displacement distance;
and calculating a second average speed value according to the second displacement difference value, wherein the calculation formula is as follows:
wherein V2 represents a second average velocity value, S2 represents a second displacement difference value, T3 represents a third preset time, and T2 represents a second preset time;
calculating a difference value between the second average speed value and the first average speed value to obtain a third average speed value;
calculating the acceleration of the X axis according to the third average velocity value, wherein the calculation formula is as follows:
wherein Vx represents an X-axis acceleration, V3 represents a third average speed value, T3 represents a third preset time, T2 represents a second preset time, and T1 represents a second preset time;
judging whether the value of the X-axis acceleration is larger than zero or not;
if the value of the X-axis acceleration is larger than zero, the displacement of the gold bonding wire along the X-axis direction is effective movement;
and if the value of the X-axis acceleration is equal to zero, the displacement of the gold bonding wire along the X-axis direction is invalid movement.
Preferably, the step of obtaining the overall displacement distance of the gold bonding wire at a preset time and calculating the acceleration of the movement of the gold bonding wire according to the overall displacement distance further includes:
acquiring a fourth overall displacement distance of the gold bonding wire along the Y-axis direction at a first preset time and a fifth overall displacement distance of the gold bonding wire along the Y-axis direction at a second preset time;
calculating a third displacement difference between the fourth global displacement distance and the fifth global displacement distance;
and calculating a fourth average speed value according to the third displacement difference value, wherein the calculation formula is as follows:
wherein V4 represents a fourth average speed value, S3 represents a third displacement difference value, T2 represents a second preset time, and T1 represents a first preset time;
acquiring a sixth integral displacement distance along the Y-axis direction at the third preset moment;
calculating a fourth displacement difference between the sixth global displacement distance and the fifth global displacement distance;
and calculating a fifth average speed value according to the fourth displacement difference value, wherein the calculation formula is as follows:
wherein V5 represents a fifth average speed value, S4 represents a fourth displacement difference value, T3 represents a third preset time, and T2 represents a second preset time;
calculating a difference value between the fifth average speed value and the fourth average speed value to obtain a sixth average speed value;
and calculating the acceleration of the Y axis according to the sixth average speed value, wherein the calculation formula is as follows:
wherein Vy represents the Y-axis acceleration, V6 represents the sixth average velocity value, T3 represents the third preset time, T2 represents the second preset time, and T1 represents the second preset time;
judging whether the value of the Y-axis acceleration is greater than zero;
if the value of the Y-axis acceleration is larger than zero, the displacement of the gold bonding wire along the Y-axis direction is effective movement;
and if the value of the Y-axis acceleration is equal to zero, the displacement of the gold bonding wire along the Y-axis direction is invalid movement.
Preferably, the step of acquiring first length information and first tension information of the gold bonding wire and judging whether the gold bonding wire is broken according to the first length information and the first tension information includes:
acquiring an initial length value and an initial tension value of a gold bonding wire;
obtaining a stretching length value of the stretched gold bonding wire, and calculating a stretching tension value according to the stretching length value;
calculating the difference value between the tensile force value and a preset tensile force value to obtain a first tensile force difference value;
judging whether the first tension difference value is zero or not;
if the first tension difference value is not zero, controlling the gold bonding wire to continue stretching;
returning to the step of obtaining the stretching length value of the stretched gold bonding wire and calculating the stretching tension value according to the stretching length value;
and if the first tension difference value is zero, judging that the gold bonding wire is broken.
Preferably, the step of obtaining a fracture tension value at the time of fracture and judging whether the tension detection of the gold bonding wire is qualified according to the fracture tension value at the time of fracture includes:
acquiring a fracture tension value of the fractured gold bonding wire during fracture;
calculating the difference value between the fracture tension value and the preset tension value to obtain a second tension difference value;
judging whether the second tension difference value is greater than or equal to zero or not;
if the second tension difference value is larger than or equal to zero, judging that the gold bonding wire is qualified;
and if the second tension difference value is smaller than zero, determining that the gold bonding wire is unqualified.
Preferably, after the step of determining that the gold bonding wire has moved to a fixed position in the tensile testing apparatus, the method further includes:
acquiring a first length and a first resistance value of the elastic element at a first preset moment;
acquiring a second length, a second resistance value and a stress area of the elastic element at a second preset moment;
calculating the difference between the second length and the first length to obtain a first strain value of the elastic element;
calculating a difference value between the second resistance value and the first resistance value to obtain a resistance difference value;
calculating a voltage value at a second preset moment according to the resistance difference value and the first strain value;
and calculating an external tension value according to the stress area and the voltage value at the second preset moment, wherein the calculation formula is as follows:
F＝S*U*E；
the F represents an external tension value, the S represents the stress area of the elastic element obtained at a second preset time, the U represents a voltage value at the second preset time, and the E represents an elastic modulus value of the elastic element;
judging whether the external tension value is greater than or equal to zero;
if the external tension value is greater than or equal to zero, judging that the gold bonding wire is qualified;
and if the external tension value is smaller than zero, determining that the gold bonding wire is unqualified.
The application still provides a device of bonding gold wire pulling force automatic testing, includes:
the first acquisition module is used for acquiring the integral displacement distance of the gold bonding wire at a preset moment and calculating the moving acceleration of the gold bonding wire according to the integral displacement distance;
the first judgment module is used for judging whether the acceleration is zero or not;
the first judging module is used for judging that the gold bonding wire moves to a fixed position in the tensile testing equipment if the acceleration is zero;
the second obtaining module is used for obtaining first length information and first tension information of the gold bonding wire and judging whether the gold bonding wire is broken or not according to the first length information and the first tension information;
and the second judgment module is used for acquiring a fracture tension value during fracture if the bonding gold wire is fractured, and judging whether the tension detection of the bonding gold wire is qualified or not according to the fracture tension value during fracture so as to finish the tension automatic test of the bonding gold wire.
The application also provides computer equipment which comprises a memory and a processor, wherein the memory stores computer programs, and the processor executes the computer programs to realize the steps of the method for automatically testing the tension of the gold bonding wire.
The present application further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the above method for automatically testing the tensile force of the gold bonding wire.
The beneficial effect of this application does: the method comprises the steps of calculating the moving acceleration of the gold bonding wire according to the integral displacement distance by obtaining the integral displacement distance of the gold bonding wire at a plurality of preset moments, judging whether the acceleration is zero, if the acceleration is zero, representing that the gold bonding wire moves to a fixed position in a tension test device, starting a tension test by the tension test device at the moment, obtaining first length information and first tension information of the gold bonding wire, judging whether the gold bonding wire is broken according to the first length information and the first tension information, if the gold bonding wire is broken, obtaining a breaking tension value during breakage, and judging whether the tension of the gold bonding wire is qualified according to the integral length value and the breaking tension value of the broken gold; therefore, the quality of the bonding gold wire can be directly judged whether to be qualified or not automatically through the length value and the tension value of the bonding gold wire without human observation, so that the tension test of the bonding gold wire can be automatically completed by the tension test equipment, and the working efficiency of the tension test is improved.
Drawings
Fig. 1 is a schematic flow chart of a method for automatically testing a tensile force of a gold bonding wire according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an apparatus for automatically testing a tensile force of a gold bonding wire according to an embodiment of the present application.
Fig. 3 is a schematic diagram of an internal structure of a computer device according to an embodiment of the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
As shown in fig. 1-3, the present application provides a method for automatically testing the tension of a gold bonding wire, which is applied to a tension testing apparatus, and includes:
s1, acquiring the integral displacement distance of the gold bonding wire at a preset moment, and calculating the moving acceleration of the gold bonding wire according to the integral displacement distance;
s2, judging whether the acceleration is zero or not;
s3, if the acceleration is zero, determining that the gold bonding wire moves to a fixed position in the tensile testing equipment;
s4, acquiring first length information and first tension information of the gold bonding wire, and judging whether the gold bonding wire is broken or not according to the first length information and the first tension information;
and S5, if the gold bonding wire is broken, acquiring a breaking tension value during breaking, and judging whether the tension detection of the gold bonding wire is qualified according to the breaking tension value during breaking so as to finish the tension automatic test of the gold bonding wire.
As described in the above steps S1-S5, when the tensile force of the gold bonding wire is tested in the prior art, usually, the tensile testing device is controlled to be opened after the tensile testing device is placed at a fixed position of the tensile testing device, and then the tensile testing device detects the tensile force, the change of the bonding gold wire needs to be observed manually during detection, and whether the quality of the bonding gold wire is qualified or not can be known after the bonding gold wire is usually stretched for many times by controlling a tensile testing device, for example, the bonding gold A is stretched and broken 10 times, the bonding gold B is stretched and broken 15 times, the bonding gold C is stretched and broken 20 times, the tensile force testing equipment is set to be qualified without fracture within 15 times of stretching, so that the quality of the B bonding gold wire and the quality of the C bonding gold wire are qualified, the method is time-consuming and labor-consuming, whether the bonding gold wire fractures or not needs to be observed by manpower, and the efficiency is low; and because the gold bonding wire is generally a flow line test, usually, the tensile force is tested only after the previous device test is completed, therefore, in this embodiment, first, by obtaining the overall displacement distance of the gold bonding wire at a plurality of preset times, the moving acceleration of the gold bonding wire can be calculated according to the overall displacement distance, then, whether the acceleration is zero or not is judged, if the acceleration is zero, it represents that the gold bonding wire has moved to a fixed position in the tensile force testing device, at this time, the tensile force testing device starts tensile force testing, first length information and first tensile force information of the gold bonding wire are obtained, then, whether the gold bonding wire is broken or not is judged according to the first length information and the first tensile force information, wherein the first length information includes an initial length value and a tensile length value of the gold bonding wire, and the first tensile force information includes an initial tensile force value and a tensile force value, and if the gold bonding wire is broken, acquiring a fracture tension value during fracture, and judging whether the tension of the gold bonding wire is qualified or not according to the integral length value and the fracture tension value of fracture; therefore, the quality of the bonding gold wire can be directly judged whether to be qualified or not automatically through the length value and the tension value of the bonding gold wire without human observation, so that the tension test of the bonding gold wire can be automatically completed by the tension test equipment, and the working efficiency of the tension test is improved.
In one embodiment, before the step S1 of obtaining the overall displacement distance of the gold bonding wire at a preset time, the method further includes:
s101, acquiring a pressure value of a pressure sensor;
s102, judging whether the pressure value is larger than a first preset value or not;
s103, if the pressure value is larger than a first preset value, the gold bonding wire is judged to be placed into a tensile test device.
As described in the foregoing steps S101 to S103, before determining whether the gold bonding wire moves to the fixed position where the gold bonding wire is placed in the tensile test apparatus, it may be determined whether the gold bonding wire is placed in the tensile test apparatus by obtaining a pressure value of the pressure sensor, and if the pressure value is greater than a first preset value, it is determined that the gold bonding wire is placed in the tensile test apparatus, and at this time, the tensile test apparatus is turned on, and a tensile test mode is ready to be entered.
For a clearer explanation of the present application, the first preset time in the following embodiments is time T0 (unit: second), the second preset time is time T1 (unit: second), the third preset time is time T2 (unit: second), and the preset tension value is F0.
In one embodiment, the step S1 of acquiring a total displacement distance of the gold bonding wire at a preset time and calculating an acceleration of the movement of the gold bonding wire according to the total displacement distance includes:
s11, acquiring a first overall displacement distance of the gold bonding wire along the X-axis direction at a first preset moment and a second overall displacement distance of the gold bonding wire along the X-axis direction at a second preset moment;
s12, calculating a first displacement difference value between the second overall displacement distance and the first overall displacement distance;
s13, calculating a first average speed value according to the first displacement difference value, wherein the calculation formula is as follows:
wherein V1 represents a first average speed value, S1 represents a first displacement difference value, T2 represents a second preset time, and T1 represents a first preset time;
s14, acquiring a third overall displacement distance along the X-axis direction at a third preset moment;
s15, calculating a second displacement difference value between the third overall displacement distance and the second overall displacement distance;
s16, calculating a second average speed value according to the second displacement difference value, wherein the calculation formula is as follows:
wherein V2 represents a second average velocity value, S2 represents a second displacement difference value, T3 represents a third preset time, and T2 represents a second preset time;
s17, calculating the difference between the second average speed value and the first average speed value to obtain a third average speed value;
s18, calculating the X-axis acceleration according to the third average speed value, wherein the calculation formula is as follows:
wherein Vx represents an X-axis acceleration, V3 represents a third average speed value, T3 represents a third preset time, T2 represents a second preset time, and T1 represents a second preset time;
s19, judging whether the value of the X-axis acceleration is larger than zero;
s110, if the value of the X-axis acceleration is larger than zero, the displacement of the gold bonding wire along the X-axis direction is effective movement;
and S111, if the value of the X-axis acceleration is equal to zero, the displacement of the gold bonding wire along the X-axis direction is invalid movement.
As described in the foregoing steps S11-S111, the present application can calculate a first displacement difference and a first average velocity value by obtaining a first global displacement distance of the gold bonding wire along the X-axis direction at time T0 and a second global displacement distance along the X-axis direction at time T1, then obtain a third global displacement distance at time T3, and calculate a second displacement difference between the third global displacement distance and the second global displacement distance, so as to calculate a second average velocity value, and then calculate a difference between the second average velocity value and the first average velocity value, so as to obtain a third average velocity value; acceleration of the bonding wire in the X-axis direction can be calculated from the third average velocity value, time T2, time T1, and time T0, and if the acceleration is greater than zero, it indicates that the bonding wire is moving, and if the acceleration is equal to zero, it indicates that the bonding wire is ineffectively moving in the X-axis direction, that is, the bonding wire is stationary or moving at a constant velocity in the X-axis direction. The speed of the movement speed of the gold bonding wire in unit time can be known by calculating the acceleration value of the gold bonding wire along the X axis, if the acceleration value is higher, the higher the movement speed of the gold bonding wire is represented, and if the acceleration value is lower, the lower the movement speed of the gold bonding wire is represented, so that the moving state of the gold bonding wire in the X axis direction can be conveniently known, and the moving position of the gold bonding wire can be conveniently and accurately confirmed subsequently.
In one embodiment, the step S1 of acquiring a total displacement distance of the gold bonding wire at a preset time, and calculating an acceleration of the movement of the gold bonding wire according to the total displacement distance, further includes:
s112, acquiring a fourth overall displacement distance of the gold bonding wire along the Y-axis direction at a first preset time and a fifth overall displacement distance along the Y-axis direction at a second preset time;
s113, calculating a third displacement difference value between the fourth overall displacement distance and the fifth overall displacement distance;
s114, calculating a fourth average speed value according to the third displacement difference value, wherein the calculation formula is as follows:
wherein V4 represents a fourth average speed value, S3 represents a third displacement difference value, T2 represents a second preset time, and T1 represents a first preset time;
s115, acquiring a sixth integral displacement distance along the Y-axis direction at the third preset moment;
s116, calculating a fourth displacement difference value between the sixth overall displacement distance and the fifth overall displacement distance;
s117, calculating a fifth average speed value according to the fourth displacement difference value, wherein the calculation formula is as follows:
wherein V5 represents a fifth average speed value, S4 represents a fourth displacement difference value, T3 represents a third preset time, and T2 represents a second preset time;
s118, calculating a difference value between the fifth average speed value and the fourth average speed value to obtain a sixth average speed value;
s119, calculating the acceleration of the Y axis according to the sixth average speed value, wherein the calculation formula is as follows:
wherein Vy represents the Y-axis acceleration, V6 represents the sixth average velocity value, T3 represents the third preset time, T2 represents the second preset time, and T1 represents the second preset time;
s120, judging whether the value of the Y-axis acceleration is larger than zero;
s121, if the value of the Y-axis acceleration is larger than zero, the displacement of the gold bonding wire along the Y-axis direction is effective movement;
and S122, if the value of the Y-axis acceleration is equal to zero, the displacement of the gold bonding wire along the Y-axis direction is invalid movement.
As described in the foregoing steps S112-S122, the present application can calculate a third displacement difference and a fourth average velocity value by obtaining a fourth global displacement distance of the gold bonding wire along the Y axis direction at time T0 and a fifth global displacement distance along the Y axis direction at time T1, then obtain a sixth global displacement distance at time T3, and calculate a fourth displacement difference between the sixth global displacement distance and the fifth global displacement distance, so as to calculate a fifth average velocity value, and then calculate a difference between the fifth average velocity value and the fourth average velocity value, so as to obtain a sixth average velocity value; the acceleration of the bonding wire in the Y-axis direction can be calculated from the sixth average velocity value, the time T2, the time T1, and the time T0, and if the acceleration is greater than zero, it indicates that the bonding wire is moving, and if the acceleration is equal to zero, it indicates that the bonding wire is ineffectively moving in the Y-axis direction, that is, the Y-axis direction is stationary or moving at a constant speed. The speed of the movement speed of the gold bonding wire in unit time can be known by calculating the acceleration value of the gold bonding wire along the Y axis, if the acceleration value is higher, the higher the movement speed of the gold bonding wire is represented, and if the acceleration value is lower, the lower the movement speed of the gold bonding wire is represented, so that the moving state of the gold bonding wire in the Y axis direction can be conveniently known, and the moving position of the gold bonding wire can be conveniently and accurately confirmed subsequently.
In one embodiment, the step S4 of obtaining the first length information and the first tensile information of the gold bonding wire, and determining whether the gold bonding wire is broken according to the first length information and the first tensile information includes:
s41, obtaining an initial length value and an initial tension value of the gold bonding wire;
s42, obtaining a stretching length value of the stretched gold bonding wire, and calculating a stretching tension value according to the stretching length value;
s43, calculating the difference value between the tensile force value and a preset tensile force value to obtain a first tensile force difference value;
s44, judging whether the first tension difference value is zero or not;
s45, if the first tension difference is not zero, controlling the gold bonding wire to continue to stretch;
s46, returning to the step of obtaining the stretched length value of the gold bonding wire after stretching, and calculating the stretching tension value according to the stretching length value;
and S47, if the first tension difference is zero, determining that the gold bonding wire is broken.
As described in the above steps S41-S47, the tensile force value may be calculated by obtaining the initial length value, the initial tensile force value, and the stretched length value of the gold bonding wire, and then the first tensile force difference value is obtained by the difference between the tensile force value and the preset tensile force value F0; and judging whether the bonding gold wire is broken or not by judging whether the first tension difference value is zero or not. Preferably, since the first tension difference is zero if the bonding gold wire is broken, if the stretching is repeated for a plurality of times, for example, 15 times, and the first tension difference is not zero, it represents that the bonding gold wire is not broken, and the bonding gold wire can be determined to be qualified according to the fact that the number of times of repeated stretching exceeds the preset number (14 times).
In an embodiment, the step S5 of obtaining a breaking tension value at the time of breaking and determining whether the tension detection of the gold bonding wire is qualified according to the breaking tension value at the time of breaking includes:
s51, obtaining a fracture tension value of the fractured gold bonding wire during fracture;
s52, calculating the difference value between the fracture tension value and the preset tension value to obtain a second tension difference value;
s53, judging whether the second tension difference value is larger than or equal to zero or not;
s54, if the second tension difference value is larger than or equal to zero, judging that the gold bonding wire is qualified;
and S55, if the second tension difference is smaller than zero, determining that the gold bonding wire is unqualified.
As described in the foregoing steps S51-S55, the second tensile value may be obtained by obtaining a fracture tensile value of the fractured gold bonding wire during fracture, and then calculating a difference between the preset tensile value and the fracture tensile value during fracture, and whether the gold bonding wire is qualified may be determined by determining whether the second tensile difference is greater than or equal to zero.
In one embodiment, after the step S3 of determining that the gold bonding wire has moved to a fixed position in the tensile testing apparatus, the method further includes:
s301, acquiring a first length and a first resistance value of the elastic element at a first preset moment;
s302, acquiring a second length, a second resistance value and a stress area of the elastic element at a second preset time;
s303, calculating a difference value between the second length and the first length to obtain a first strain value of the elastic element;
s304, calculating a difference value between the second resistance value and the first resistance value to obtain a resistance difference value;
s305, calculating a voltage value at a second preset moment according to the resistance difference value and the first strain value;
s306, calculating an external tension value according to the stressed area and the voltage value at the second preset moment, wherein the calculation formula is as follows:
F＝S*U*E；
the F represents an external tension value, the S represents the stress area of the elastic element obtained at a second preset time, the U represents a voltage value at the second preset time, and the E represents an elastic modulus value of the elastic element;
s307, judging whether the external tension value is greater than or equal to zero;
s308, if the external tension value is greater than or equal to zero, judging that the gold bonding wire is qualified;
s309, if the external tension value is smaller than zero, determining that the gold bonding wire is unqualified.
As described in steps S301 to S309, in the tension test, the measurement may be performed by a load cell, and a commonly used load cell is a strain gauge sensor. The strain gauge type sensor is composed of a strain gauge, an elastic element and some accessories (a compensation element, a protective cover, a wiring socket and a loading piece), and mechanical quality is changed into electric quantity to be output. Under the condition of small deformation, the strain value of a certain point of an elastic element is in direct proportion to the force borne by the elastic element and also in direct proportion to the deformation of the elasticity. When the strain gauge type sensor is subjected to the tensile force effect, because the strain gauge is adhered to the outer surface of the elastic element, the strain of the elastic element is in direct proportion to the external force F, the output voltage of the elastic element can be measured by connecting the strain gauge into the measuring circuit, and then the magnitude of the force is measured. Therefore, in this embodiment, the external tensile force value can be calculated by calculating the first resistance value, the first strain value, and the voltage value at the second preset time of the elastic element, and thus, whether the gold bonding wire is qualified can be determined by determining whether the external tensile force value is greater than or equal to zero.
The application still provides a device of bonding gold wire pulling force automatic testing, includes:
the first acquisition module 1 is used for acquiring the integral displacement distance of the gold bonding wire at a preset moment and calculating the moving acceleration of the gold bonding wire according to the integral displacement distance;
the first judging module 2 is used for judging whether the acceleration is zero or not;
the first judging module 3 is used for judging that the gold bonding wire moves to a fixed position in the tensile testing equipment if the acceleration is zero;
the second obtaining module 4 is configured to obtain first length information and first tensile force information of the gold bonding wire if the gold bonding wire has moved to a fixed position in the tensile force testing device, and determine whether the gold bonding wire is broken according to the first length information and the first tensile force information;
and the second judging module 5 is used for acquiring a fracture tension value during fracture if the bonding gold wire is fractured, and judging whether the tension detection of the bonding gold wire is qualified or not according to the fracture tension value during fracture so as to finish the tension automatic test of the bonding gold wire.
In one embodiment, the apparatus for automatically testing the tension of the gold bonding wire further comprises:
the third acquisition module is used for acquiring the pressure value of the pressure sensor;
the third judgment module is used for judging whether the pressure value is greater than the first preset value or not;
and the second judging module is used for judging that the gold bonding wire is placed in the tension testing equipment if the pressure value is greater than the first preset value.
In one embodiment, the first obtaining module 1 includes:
the first obtaining unit is used for obtaining a first integral displacement distance of the gold bonding wire along the X-axis direction at a first preset moment and a second integral displacement distance of the gold bonding wire along the X-axis direction at a second preset moment;
a first calculation unit configured to calculate a first displacement difference between the second overall displacement distance and the first overall displacement distance;
a second calculating unit, for calculating a first average speed value according to the first displacement difference, wherein the calculation formula is:
wherein V1 represents a first average speed value, S1 represents a first displacement difference value, T2 represents a second preset time, and T1 represents a first preset time;
the second acquisition unit is used for acquiring a third overall displacement distance along the X-axis direction at a third preset moment;
a third calculating unit, configured to calculate a second displacement difference between the third overall displacement distance and the second overall displacement distance;
a fourth calculating unit, configured to calculate a second average speed value according to the second displacement difference value, where the calculation formula is:
wherein V2 represents a second average velocity value, S2 represents a second displacement difference value, T3 represents a third preset time, and T2 represents a second preset time;
a fifth calculating unit, configured to calculate a difference between the second average speed value and the first average speed value to obtain a third average speed value;
a sixth calculating unit, configured to calculate an X-axis acceleration according to the third average velocity value, where the calculation formula is:
wherein Vx represents an X-axis acceleration, V3 represents a third average speed value, T3 represents a third preset time, T2 represents a second preset time, and T1 represents a second preset time;
a first judgment unit for judging whether the value of the X-axis acceleration is greater than zero;
the first effective moving unit is used for enabling the displacement of the gold bonding wire along the X-axis direction to be effective movement if the value of the X-axis acceleration is larger than zero;
and the first invalid moving unit is used for determining that the displacement of the gold bonding wire along the X-axis direction is invalid movement if the value of the X-axis acceleration is equal to zero.
In one embodiment, the first obtaining module 1 further includes:
the third obtaining unit is used for obtaining a fourth overall displacement distance of the gold bonding wire along the Y-axis direction at a first preset time and a fifth overall displacement distance along the Y-axis direction at a second preset time;
a seventh calculation unit configured to calculate a third displacement difference between the fourth overall displacement distance and the fifth overall displacement distance;
an eighth calculating unit, configured to calculate a fourth average speed value according to the third displacement difference, where the calculation formula is:
wherein V4 represents a fourth average speed value, S3 represents a third displacement difference value, T2 represents a second preset time, and T1 represents a first preset time;
a fourth obtaining unit, configured to obtain a sixth overall displacement distance in the Y-axis direction at the third preset time;
a ninth calculation unit configured to calculate a fourth displacement difference between the sixth overall displacement distance and the fifth overall displacement distance;
a tenth calculating unit, configured to calculate a fifth average velocity value according to the fourth displacement difference value, where the calculation formula is:
wherein V5 represents a fifth average speed value, S4 represents a fourth displacement difference value, T3 represents a third preset time, and T2 represents a second preset time;
an eleventh calculating unit, configured to calculate a difference between the fifth average speed value and the fourth average speed value to obtain a sixth average speed value;
a twelfth calculating unit, configured to calculate a Y-axis acceleration according to the sixth average velocity value, where the calculation formula is:
wherein Vy represents the Y-axis acceleration, V6 represents the sixth average velocity value, T3 represents the third preset time, T2 represents the second preset time, and T1 represents the second preset time;
a second judgment unit configured to judge whether the value of the Y-axis acceleration is greater than zero;
the second effective moving unit is used for enabling the displacement of the gold bonding wire along the Y-axis direction to be effective movement if the value of the Y-axis acceleration is larger than zero;
and the second invalid moving unit is used for determining that the displacement of the gold bonding wire along the Y-axis direction is invalid movement if the value of the Y-axis acceleration is equal to zero.
In one embodiment, the second obtaining module 4 includes:
a fifth obtaining unit, configured to obtain an initial length value and an initial tension value of the gold bonding wire;
a sixth obtaining unit, configured to obtain a stretching length value of the stretched gold bonding wire, and calculate a stretching tension value according to the stretching length value;
the thirteenth calculating unit is used for calculating the difference value between the tensile force value and the preset tensile force value to obtain a first tensile force difference value;
the third judging unit is used for judging whether the first tension difference value is zero or not;
the control unit is used for controlling the bonding gold wire to continue to stretch if the first tension difference value is not zero;
a returning unit, configured to return to the step of obtaining the stretched length value of the gold bonding wire after stretching, and calculating a tensile force value according to the stretched length value;
and the fracture judging unit is used for judging that the bonding gold wire is fractured if the first tension difference value is zero.
In one embodiment, the second determining module 5 includes:
a seventh obtaining unit, configured to obtain a fracture tension value of the fractured gold bonding wire during fracture;
a fourteenth calculating unit, configured to calculate a difference between the fracture tension value and the preset tension value, so as to obtain a second tension difference;
the fourth judging unit is used for judging whether the second tension difference value is larger than or equal to zero or not;
the first judging unit is used for judging that the gold bonding wire is qualified if the second tension difference value is greater than or equal to zero;
and the second judging unit is used for judging that the gold bonding wire is unqualified if the second tension difference value is smaller than zero.
In one embodiment, the apparatus for automatically testing the tension of the gold bonding wire further comprises:
the fourth obtaining module is used for obtaining the first length and the first resistance value of the elastic element at a first preset moment;
the fifth acquiring module is used for acquiring a second length, a second resistance value and a stress area of the elastic element at a second preset time;
a fifteenth calculating module, configured to calculate a difference between the second length and the first length to obtain a first strain value of the elastic element;
a sixteenth calculating module, configured to calculate a difference between the second resistance value and the first resistance value to obtain a resistance difference;
a seventeenth calculation module, configured to calculate a voltage value at a second preset time according to the resistance difference and the first strain value;
an eighteenth calculating module, configured to calculate an external pulling force value according to the stressed area and the voltage value at the second preset time, where the calculation formula is:
F＝S*U*E；
the F represents an external tension value, the S represents the stress area of the elastic element obtained at a second preset time, the U represents a voltage value at the second preset time, and the E represents an elastic modulus value of the elastic element;
the fourth judging module is used for judging whether the external tension value is greater than or equal to zero or not;
the third judging module is used for judging that the gold bonding wire is qualified if the external tension value is greater than or equal to zero;
and the fourth judging module is used for judging that the gold bonding wire is unqualified if the external tension value is smaller than zero.
As shown in fig. 3, the present application also provides a computer device, which may be a server, and the internal structure of which may be as shown in fig. 3. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the computer designed processor is used to provide computational and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used for storing all data required by the process of the method for automatically testing the tension of the gold bonding wire. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to realize the method for automatically testing the tension of the gold bonding wire.
Those skilled in the art will appreciate that the architecture shown in fig. 3 is only a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects may be applied.
An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for automatically testing the tensile force of any one of the above-mentioned cemented carbide wires is implemented.
It will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by hardware associated with instructions of a computer program, which may be stored on a non-volatile computer-readable storage medium, and when executed, may include processes of the above embodiments of the methods. Any reference to memory, storage, database, or other medium provided herein and used in the examples may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double-rate SDRAM (SSRSDRAM), Enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, apparatus, article, or method. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, apparatus, article, or method that includes the element.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A method for automatically testing the tension of a gold bonding wire is applied to tension testing equipment and is characterized by comprising the following steps:
acquiring the integral displacement distance of the gold bonding wire at a preset moment, and calculating the moving acceleration of the gold bonding wire according to the integral displacement distance;
judging whether the acceleration is zero or not;
if the acceleration is zero, determining that the gold bonding wire moves to a fixed position in the tensile testing equipment;
acquiring first length information and first tension information of a gold bonding wire, and judging whether the gold bonding wire is broken or not according to the first length information and the first tension information;
and if the bonding gold wire is broken, acquiring a breaking tension value during breakage, and judging whether the tension detection of the bonding gold wire is qualified or not according to the breaking tension value during breakage so as to finish the tension automatic test of the bonding gold wire.
2. The method for automatically testing the tensile force of the gold bonding wire according to claim 1, wherein the step of obtaining the overall displacement distance of the gold bonding wire at a preset time is preceded by the steps of:
acquiring a pressure value of a pressure sensor;
judging whether the pressure value is greater than a first preset value or not;
and if the pressure value is greater than a first preset value, judging that the gold bonding wire is placed in the tension test equipment.
3. The method for automatically testing the tension of the gold bonding wire according to claim 1, wherein the step of obtaining the overall displacement distance of the gold bonding wire at a preset time and calculating the acceleration of the movement of the gold bonding wire according to the overall displacement distance comprises:
acquiring a first integral displacement distance of the gold bonding wire along the X-axis direction at a first preset moment and a second integral displacement distance of the gold bonding wire along the X-axis direction at a second preset moment;
calculating a first displacement difference between the second global displacement distance and the first global displacement distance;
calculating a first average speed value according to the first displacement difference value, wherein the calculation formula is as follows:
wherein V1 represents a first average speed value, S1 represents a first displacement difference value, T2 represents a second preset time, and T1 represents a first preset time;
acquiring a third integral displacement distance along the X-axis direction at a third preset moment;
calculating a second displacement difference between the third global displacement distance and the second global displacement distance;
and calculating a second average speed value according to the second displacement difference value, wherein the calculation formula is as follows:
wherein V2 represents a second average velocity value, S2 represents a second displacement difference value, T3 represents a third preset time, and T2 represents a second preset time;
calculating a difference value between the second average speed value and the first average speed value to obtain a third average speed value;
calculating the acceleration of the X axis according to the third average velocity value, wherein the calculation formula is as follows:
wherein Vx represents an X-axis acceleration, V3 represents a third average speed value, T3 represents a third preset time, T2 represents a second preset time, and T1 represents a second preset time;
judging whether the value of the X-axis acceleration is larger than zero or not;
if the value of the X-axis acceleration is larger than zero, the displacement of the gold bonding wire along the X-axis direction is effective movement;
and if the value of the X-axis acceleration is equal to zero, the displacement of the gold bonding wire along the X-axis direction is invalid movement.
4. The method according to claim 3, wherein the step of obtaining a global displacement distance of the gold bonding wire at a predetermined time and calculating the acceleration of the gold bonding wire movement according to the global displacement distance further comprises:
acquiring a fourth overall displacement distance of the gold bonding wire along the Y-axis direction at a first preset time and a fifth overall displacement distance of the gold bonding wire along the Y-axis direction at a second preset time;
calculating a third displacement difference between the fourth global displacement distance and the fifth global displacement distance;
and calculating a fourth average speed value according to the third displacement difference value, wherein the calculation formula is as follows:
wherein V4 represents a fourth average speed value, S3 represents a third displacement difference value, T2 represents a second preset time, and T1 represents a first preset time;
acquiring a sixth integral displacement distance along the Y-axis direction at the third preset moment;
calculating a fourth displacement difference between the sixth global displacement distance and the fifth global displacement distance;
and calculating a fifth average speed value according to the fourth displacement difference value, wherein the calculation formula is as follows:
wherein V5 represents a fifth average speed value, S4 represents a fourth displacement difference value, T3 represents a third preset time, and T2 represents a second preset time;
calculating a difference value between the fifth average speed value and the fourth average speed value to obtain a sixth average speed value;
and calculating the acceleration of the Y axis according to the sixth average speed value, wherein the calculation formula is as follows:
wherein Vy represents the Y-axis acceleration, V6 represents the sixth average velocity value, T3 represents the third preset time, T2 represents the second preset time, and T1 represents the second preset time;
judging whether the value of the Y-axis acceleration is greater than zero;
if the value of the Y-axis acceleration is larger than zero, the displacement of the gold bonding wire along the Y-axis direction is effective movement;
and if the value of the Y-axis acceleration is equal to zero, the displacement of the gold bonding wire along the Y-axis direction is invalid movement.
5. The method of claim 1, wherein the step of obtaining first length information and first tension information of the gold bonding wire and determining whether the gold bonding wire is broken according to the first length information and the first tension information comprises:
acquiring an initial length value and an initial tension value of a gold bonding wire;
obtaining a stretching length value of the stretched gold bonding wire, and calculating a stretching tension value according to the initial length value, the initial tension value and the stretching length value;
calculating the difference value between the tensile force value and a preset tensile force value to obtain a first tensile force difference value;
judging whether the first tension difference value is zero or not;
if the first tension difference value is not zero, controlling the gold bonding wire to continue stretching;
returning to the step of obtaining the stretching length value of the stretched gold bonding wire and calculating the stretching tension value according to the stretching length value;
and if the first tension difference value is zero, judging that the gold bonding wire is broken.
6. The method for automatically testing the tension of the gold bonding wire according to claim 1, wherein the step of obtaining the breaking tension value at the time of breaking and judging whether the tension detection of the gold bonding wire is qualified according to the breaking tension value at the time of breaking comprises:
acquiring a fracture tension value during fracture;
calculating the difference value between the fracture tension value and the preset tension value to obtain a second tension difference value;
judging whether the second tension difference value is greater than or equal to zero or not;
if the second tension difference value is larger than or equal to zero, judging that the gold bonding wire is qualified;
and if the second tension difference value is smaller than zero, determining that the gold bonding wire is unqualified.
7. The method of automatic gold bonding wire tensile testing according to claim 1, wherein said step of determining that the gold bonding wire has moved to a fixed position in the tensile testing apparatus is followed by the steps of:
acquiring a first length and a first resistance value of the elastic element at a first preset moment;
acquiring a second length, a second resistance value and a stress area of the elastic element at a second preset moment;
calculating the difference between the second length and the first length to obtain a first strain value of the elastic element;
calculating a difference value between the second resistance value and the first resistance value to obtain a resistance difference value;
calculating a voltage value at a second preset moment according to the resistance difference value and the first strain value;
and calculating an external tension value according to the stress area and the voltage value at the second preset moment, wherein the calculation formula is as follows:
F＝S*U*E；
the F represents an external tension value, the S represents the stress area of the elastic element obtained at a second preset time, the U represents a voltage value at the second preset time, and the E represents an elastic modulus value of the elastic element;
judging whether the external tension value is greater than or equal to zero;
if the external tension value is greater than or equal to zero, judging that the gold bonding wire is qualified;
and if the external tension value is smaller than zero, determining that the gold bonding wire is unqualified.
8. A device for automatically testing tension of gold bonding wire is characterized by comprising:
the first acquisition module is used for acquiring the integral displacement distance of the gold bonding wire at a preset moment and calculating the moving acceleration of the gold bonding wire according to the integral displacement distance;
the first judgment module is used for judging whether the acceleration is zero or not;
the first judging module is used for judging that the gold bonding wire moves to a fixed position in the tensile testing equipment if the acceleration is zero;
the second obtaining module is used for obtaining first length information and first tension information of the gold bonding wire and judging whether the gold bonding wire is broken or not according to the first length information and the first tension information;
and the second judgment module is used for acquiring a fracture tension value during fracture if the bonding gold wire is fractured, and judging whether the tension detection of the bonding gold wire is qualified or not according to the fracture tension value during fracture so as to finish the tension automatic test of the bonding gold wire.
9. A computer device comprising a memory and a processor, said memory storing a computer program, wherein said processor when executing said computer program performs the steps of the method for automatic bond wire tensile testing of any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the method for automatic testing of the tension of the gold bonding wire according to any one of claims 1 to 7.
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