WO2024055468A1

WO2024055468A1 - Method and system for measuring mechanical properties of smart card installation structure of communication device

Info

Publication number: WO2024055468A1
Application number: PCT/CN2022/142150
Authority: WO
Inventors: 林炜彦; 韦林艳; 肖乐
Original assignee: 闻泰通讯股份有限公司
Priority date: 2022-09-16
Filing date: 2022-12-27
Publication date: 2024-03-21
Also published as: CN115468691A

Abstract

The present disclosure relates to the field of mechanical assembly technology measurement, and provides a method and system for measuring mechanical properties of a smart card installation structure of a communication device, a terminal device, and a product. The method comprises: acquiring a pop-out process video of a card tray pop-out process; on the basis of the pop-out process video, obtaining a time-displacement association relationship of a card tray and a time-displacement association relationship of an ejector pin in the card tray pop-out process; on the basis of the time-displacement association relationship of the card tray, obtaining a critical moment when the card tray reaches a critical point, and according to the time-displacement association relationship of the card tray and the time-displacement association relationship of the ejector pin in the card tray pop-out process, and the rigidity of a pop-out rod, obtaining an ejection force of the ejector pin against the card tray at the critical moment. The method can accurately and precisely measure the mechanical properties of the card tray structure of a smart card, thereby facilitating the determination of a main factor affecting the mechanical properties of the structure.

Description

Method and system for measuring mechanical properties of smart card installation structures of communication equipment

Related cross-references

This disclosure claims priority to the Chinese patent application filed with the China Patent Office on September 16, 2022, with application number 202211129882.2 and the invention title "Measurement Method and System for Mechanical Characteristics of Smart Card Installation Structure of Communication Equipment", the entire content of which is incorporated by reference. incorporated in this disclosure.

Technical field

The present disclosure relates to the field of mechanical assembly process technology measurement, and in particular to a method, system, terminal equipment and product for measuring the mechanical properties of a smart card installation structure of communication equipment.

Background technique

In modern society, communication equipment has become an indispensable tool in people's lives; when using communication equipment, the smart card needs to be placed in the communication equipment tray, and then the communication equipment tray and the smart card are inserted into the mobile phone. When replacing or installing a smart card, the card tray needs to be ejected enough for easy installation.

In the design of the existing installation structure, due to the inability to accurately and precisely measure its mechanical properties and the inability to decouple and separate various mechanical indicators, a large amount of experimental verification is required to find out the impact on the customer identification module ( The main factor of the mechanical performance of the Subscriber Identity Module (SIM) card installation structure. Correspondingly, a large number of experiments are required to verify the mechanical indicators, which in turn leads to an increase in production costs. And because various mechanical indicators cannot be studied separately, it is difficult for the mechanical performance of the SIM card installation structure to meet the requirements within the scheduled time, which seriously affects the product delivery cycle. Ejection force, friction force, and ejection force are important mechanical properties of the installation structure. How to accurately obtain the relationship between the various mechanical properties contributed by the installation structure and the displacement of the tray during the movement of the tray under actual working conditions is an auxiliary positioning and installation structure machinery. Key factors in performance issues. As shown in Figure 6, the measurement process of the existing indicator measurement method does not take into account factors such as the deformation of the pop-up control lever and the pop-up lever. The pop-up force is equivalent to the pressing force, and the pressing force and the pop-up force corresponding to the pressing force exist. There is an obvious difference, it cannot reflect the real indicators, and the testing process is cumbersome.

Contents of the invention

(1) Technical problems to be solved

In the existing technology, factors such as the pop-up control lever and the deformation of the pop-up lever are not taken into account in the measurement process of the indicator measurement method. The pop-up force is equivalent to the pressing force, and there is a significant difference between the pressing force and the pop-up force corresponding to the pressing force. , the problem of not reflecting the real indicators.

(2) Technical solutions

Based on this, it is necessary to address the above technical issues and provide a method that can accurately and precisely measure the mechanical properties of the smart card structure, and implement measurement methods, systems, and terminal equipment for mechanical properties of smart card installation structures of communication equipment that measure various mechanical indicators. and products.

Embodiments of the present disclosure provide a method for measuring the mechanical properties of a smart card installation structure of a communication device. The smart card installation structure includes a card tray, a card holder, a card holder spring piece, a PCB board, and a shell material. The mechanics of the smart card installation structure of the communication device are Characteristic measurement methods include:

Get the video of the ejection process of the card tray;

Based on the video of the ejection process, the time-displacement correlation relationship of the card holder during the card holder ejection process, and the time-displacement correlation relationship of the ejection pin are obtained;

The critical moment when the cartridge reaches the critical point is obtained based on the time-displacement relationship of the cartridge, and based on the time-displacement relationship of the cartridge, the time-displacement relationship of the ejection pin and the ejection rod during the ejection process of the cartridge. The stiffness is used to obtain the ejection force of the ejector against the card holder at the critical moment, where the critical point refers to the position where the flange of the card holder faces the flange of the card holder elastic piece.

As an optional implementation of the embodiment of the present disclosure, based on the ejection process video, the time-displacement correlation relationship of the card tray and the time-displacement correlation relationship of the ejection pin during the card tray ejection process are obtained, including:

Read each frame of image and sampling time in the video of the pop-up process;

Identify the pixels of the card tray and the pixels of the thimble from each frame of the image;

According to the sampling time of each frame of image, the pixel points of the card tray and the pixel points of the ejection pin, the time-displacement correlation relationship of the card tray and the time-displacement correlation relationship of the ejection pin are respectively obtained.

As an optional implementation of the embodiment of the present disclosure, the critical moment when the tray reaches the critical point is obtained based on the time-displacement correlation relationship of the tray, and based on the time-displacement of the tray during the ejection process of the tray, The displacement correlation relationship, the time-displacement correlation relationship of the ejector pin and the stiffness of the ejection rod are used to obtain the ejection force of the ejector pin on the card holder at the critical moment, including:

The moment when the Cato acceleration is 0 is obtained based on the time-displacement correlation of the Cato, and the time when the Cato acceleration is 0 is the critical moment when the Cato reaches the critical point.

As an optional implementation manner of the embodiment of the present disclosure, after obtaining the time-displacement correlation relationship of the card tray during the card tray ejection process and the time-displacement correlation relationship of the ejection pin based on the ejection process video, it also includes: :

The deceleration moment when the card tray reaches the deceleration stage is obtained based on the time-displacement correlation relationship of the card tray, and based on the time-displacement correlation relationship of the card tray, the quality of the card tray and the quality of the smart card during the deceleration process of the card tray, we obtain The friction force experienced by the card holder at the moment of deceleration.

As an optional implementation manner of the embodiment of the present disclosure, the deceleration moment of the Cato reaching the deceleration stage is obtained based on the time-displacement correlation relationship of the Cato, and based on the time-displacement of the Cato during the deceleration process of the Cato The friction force on the card holder at the deceleration moment is obtained by the correlation between the displacement, the quality of the card holder and the quality of the smart card, including:

The time when the Cato acceleration is less than 0 is obtained based on the time-displacement relationship of the Cato. The time when the Cato acceleration is less than 0 is the deceleration time when the Cato reaches the deceleration stage.

The acceleration segment moment after the card tray passes the critical point is obtained based on the critical moment and the deceleration time, and based on the time-displacement relationship of the card tray, the quality of the card tray and the quality of the smart card during the acceleration process of the card tray, the obtained result is obtained The ejection force of the shrapnel on the card holder at the acceleration moment.

As an optional implementation manner of the embodiment of the present disclosure, the acceleration segment moment after the Cato passes the critical point is obtained based on the critical time and the deceleration time, and based on the time-displacement of the Cato during the acceleration process of the Cato The correlation relationship, the quality of the card holder and the quality of the smart card are used to obtain the ejection force of the shrapnel on the card holder at the acceleration moment, including:

Based on the time-displacement correlation relationship of the Cato, it is obtained that the acceleration moment when the Cato passes through the critical point is greater than 0.

Embodiments of the present disclosure provide a system for measuring mechanical properties of a smart card installation structure of communication equipment, including:

The video acquisition module obtains the ejection process video of the card tray during the ejection process;

A relationship generation module, based on the ejection process video, obtains the time-displacement correlation relationship of the card tray during the card tray ejection process, and the time-displacement correlation relationship of the ejection pin;

The ejection force calculation module obtains the critical moment when the cartridge reaches the critical point based on the time-displacement relationship of the cartridge, and based on the time-displacement relationship of the cartridge and the time-displacement relationship of the ejection pin during the cartridge ejection process The relationship and the stiffness of the ejection rod are used to obtain the ejection force of the ejector pair of the card holder at the critical moment.

Embodiments of the present disclosure provide a terminal device, including a processor and a memory. The memory stores at least one instruction, at least a program, a code set, or an instruction set. The instruction, the program, the code set, or The instruction set is loaded by the processor and executes a method for measuring mechanical characteristics of a smart card installation structure of a communication device provided by any embodiment of the present disclosure.

Embodiments of the present disclosure provide a computer program product. When instructions in the computer program product are executed by a processor of a terminal device, the terminal device can perform smart card installation of a communication device provided by any embodiment of the present disclosure. Methods for measuring structural mechanical properties.

Embodiments of the present disclosure provide a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the communication device provided by any embodiment of the present disclosure is implemented. Method for measuring mechanical properties of smart card installation structures.

Additional features and advantages of the disclosure will be set forth in the description which follows, and, in part, will be apparent from the description, or may be learned by practice of the disclosure. The objectives and other advantages of the disclosure may be realized and attained by the structure particularly pointed out in the specification, claims and appended drawings, and the details of one or more embodiments of the disclosure are set forth in the accompanying drawings and description below.

In order to make the above objects, features and advantages of the present disclosure more obvious and understandable, optional embodiments are listed below and described in detail with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those of ordinary skill in the art, It is said that other drawings can be obtained based on these drawings without exerting creative labor.

Other features, objects and advantages of the present disclosure will become more apparent upon reading the detailed description of the non-limiting embodiments taken with reference to the following drawings.

Figure 1 is a schematic flowchart of a method for measuring mechanical properties of a smart card installation structure of a communication device in one or more embodiments of the present disclosure;

Figure 2 is a schematic diagram of ejector pin displacement measurement and card tray displacement measurement in one or more embodiments of the present disclosure;

Figure 3 is a schematic diagram of the cartridge displacement stage in one or more embodiments of the present disclosure;

Figure 4 is a structural block diagram of a mechanical property measurement system for a smart card installation structure of a communication device in one or more embodiments of the present disclosure;

Figure 5 is an internal structure diagram of a terminal device in one or more embodiments of the present disclosure;

Figure 6 shows the ejection force testing method in the prior art;

Figure 7 is a flow chart of an image pixel displacement-actual displacement conversion method in one or more embodiments of the present disclosure;

Figure 8 is a flow chart of a method for calculating ejection force, friction force, and ejection force in one or more embodiments of the present disclosure.

Detailed ways

In order to understand the above objects, features and advantages of the present disclosure more clearly, the solutions of the present disclosure will be further described below. It should be noted that, as long as there is no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

Many specific details are set forth in the following description to fully understand the present disclosure, but the present disclosure can also be implemented in other ways different from those described here; obviously, the embodiments in the description are only part of the embodiments of the present disclosure, and Not all examples.

The terms "first", "second", etc. in the description and claims of the present disclosure are used to distinguish different objects, rather than to describe a specific order of objects. For example, the first camera and the second camera are used to distinguish different cameras, rather than to describe a specific order of the cameras.

An illustration will be given below by way of example, an example of which is shown in the drawing. When the following description refers to the drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with aspects of the disclosure as detailed in the appended claims.

The "plurality" mentioned in this article means two or more than two. "And/or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the related objects are in an "or" relationship.

It should be noted that the terms “first”, “second”, “third” and “fourth” in the description and claims of this disclosure are used to distinguish different objects, rather than to describe specific objects. order. The terms "including" and "having" and any variations thereof in embodiments of the present disclosure are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units and need not be limited to the clear Those steps or elements listed may instead include other steps or elements not expressly listed or inherent to the process, method, product or apparatus. Before describing this solution, let us first introduce the application scenarios involved in this solution.

With the development of science and technology, terminal devices are increasingly used in people's daily lives. People can use these terminal devices to study, entertain, work, etc. in their daily lives. Among them, each card slot design has become one of the indispensable hardware components in terminal equipment. Through different card slot designs, corresponding smart cards can be installed in the terminal equipment. Optional, the smart card can be a smart card, a SIM card, or a secure digital card. Card (Secure Digital Memory Card, SD), flash memory card (Trans-flash Card, TF), memory card, etc.

Optionally, the terminal device mentioned in this disclosure may be a communication device with a smart card installed through a card slot. For example, the communication device can be a mobile phone, a tablet computer, a notebook computer, a handheld computer, a vehicle-mounted terminal device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (Personal Digital Assistant, PDA). ) and other electronic equipment. The wearable devices may be smart watches, smart bracelets, watch phones, smart anklets, smart earrings, smart necklaces, smart headphones, etc., which are not limited in the embodiments of the present disclosure. Optionally, the operating system of the terminal device can be Android system, iOS system, Linux system, etc.

For example, for SIM cards in terminal equipment, the SIM card installation structure usually consists of a SIM card tray, a card holder, a PCB board, and a shell material to realize the installation and ejection of the SIM card tray. It is widely used in terminal equipment. , ensure that the SIM card is in good contact with the terminal device during use. During the process of installing or replacing the SIM card, the card tray should be ejected enough to facilitate installation.

However, in the design of the installation structure, due to the inability to accurately and precisely measure its mechanical properties and the inability to decouple and separate various mechanical indicators, a large amount of experimental verification is required to find out the impact on the SIM card installation structure. The main factors of mechanical performance to make up for the shortcomings of existing testing systems and methods. Correspondingly, a large number of experimental verifications bring a lot of manpower and material resources. When the problem is difficult to solve and the mechanical performance does not meet the requirements, it seriously affects the product delivery cycle. Ejection force, friction force, and ejection force are important mechanical properties of the installation structure. How to accurately obtain the relationship between the various mechanical properties contributed by the installation structure and the displacement of the tray during the movement of the tray under actual working conditions is also an auxiliary positioning of the installation structure machinery. Key factors in performance issues.

Therefore, the measurement process of the existing indicator measurement method does not take into account factors such as the deformation of the pop-up control lever and the pop-up lever. The pop-up force is equivalent to the pressing force, and there is a significant difference between the pressing force and the pop-up force corresponding to the pressing force. There are problems that it cannot reflect the real indicators and the testing process is cumbersome.

In one embodiment, please refer to FIG. 1 , which shows a schematic flowchart of a method for measuring mechanical properties of a smart card installation structure of a communication device in one or more embodiments of the present disclosure. This embodiment illustrates the application of this method to communication equipment. It should be understood that this method can also be applied to servers or terminal devices, and can also be applied to systems including terminals and servers, and is implemented through the interaction between the terminal and the server. Here, there is no restriction on the type of smart card, and cards with predetermined functions can be placed according to the functions of the card holder. Optionally, the smart card is a SIM card, SD card, TF card, or memory card. In this embodiment, as shown in Figure 1, the privacy protection method of the terminal device includes the following steps:

Step S101: Obtain the video of the ejection process during the ejection of the card tray.

Specifically, a high-speed camera was used to record the video process of the ejection pin ejecting the communication equipment tray. Please refer to FIG. 2 , which shows a schematic diagram of ejector pin displacement measurement and card tray displacement measurement in one or more embodiments of the present disclosure. As shown in Figure 2, here, the communication device needs to be placed in the center of the recording surface of the high-speed camera. The color of the placement surface is a solid color. The colors of the placement surface, thimble, and card holder are different so that the high-speed camera can distinguish them. The movement trajectory of the placement surface, ejector pin, and card holder. Here, the color of the placement surface is not limited. Optionally, the color of the placement surface is red, the color of the card tray is blue, and the color of the thimble is red. Turn on the high-speed camera before the ejector pin presses the communication device, and use the jig to push the ejector pin until the card tray is completely ejected. After the card tray is completely ejected, the video recording of the high-speed camera is stopped and the video is saved in the preset format. And use python's imageio module to decompose the video into preset format pictures frame by frame. The preset format of the video and the preset format of the picture are not limited here. Preferably, the video is stored in .avi or .mp4 format; the picture is stored in .jpg or .png format.

Step S102: Based on the ejection process video, the time-displacement correlation relationship of the card tray and the time-displacement correlation relationship of the ejection pin during the card tray ejection process are obtained.

Specifically, through the video recorded by the high-speed camera, the displacement of the card tray within the preset time period and the displacement of the ejector pin within the preset time period can be obtained. Based on the displacement of the card tray within the preset time period, the time-displacement function during the movement of the card tray can be obtained, that is, the time-displacement relationship of the card tray; based on the displacement of the ejection pin within the preset time period, the movement of the ejection pin can be obtained The time-displacement function in the process is the time-displacement relationship of the thimble.

In some embodiments, based on the ejection process video, the time-displacement correlation relationship of the card tray during the card tray ejection process, and the time-displacement correlation relationship of the ejection pin are obtained, including:

Read each frame of image and sampling time in the video of the pop-up process;

Identify the pixels of the card tray and the ejector pin from each frame of image;

According to the sampling time of each frame of image and the pixel points of the Cato and the pixels of the ejection pin, the time-displacement correlation relationship of the Cato and the time-displacement correlation relationship of the ejection pin are obtained respectively.

Specifically, the image taken by a high-speed camera is read and converted into a preset format. This image includes the entire picture after the jig is used to push the ejector pin until the card tray is completely ejected. Read the image information and time information in all pictures. Because Cato has chosen a different color from the ejection pin and the placement surface, the positions of the card pin and ejection pin can be represented by red, green, blue (Red, Green, Blue, RGB) arrays. , such as the gray RGB array = [128, 128, 128], the Cato color RGB array = [a, b, c], the thimble color RGB array = [a1, b1, d1], where a, b, c, a1, b1, c1 belong to [0, 255]. The high-speed camera is facing the center of the placement surface shown in Figure 2. The pixel positions of the placement surface are arranged using a matrix. It is assumed that there are n*n pixels in total. The length of the side of the placement surface is L. The pixel coordinates of the card holder and the ejector are expressed in [ x, y] mark, where x, y belongs to [-n/2, n/2] and is an integer; the pixel color can be represented by [x, y, u, v, w]. The video duration is L milliseconds, with a total of m frames. The time of the t-th frame is t*L/m milliseconds, where t belongs to [0, m] and is an integer.

When the tth frame image is t*L/m milliseconds, the pixel position of the card holder is represented by [x_t, y_t], the pop-up amount is represented by the minimum value of x_t, the displacement amount of the card holder is d1_t; the pixel position of the ejection pin is represented by [x1_t , y1_t] means that the ejection amount is represented by the maximum value of x1_t, and the ejection pin displacement is d2_t.

For example, assume that the video duration is 1 second and the total number of frames is 30, and the first frame image is the time of 1*1/30=1/30 second. For the first image in the video duration, by traversing all the pixels in the image, reading the RGB values of the pixels, comparing them with the RGB values of the thimbles and thimbles, finding all the thimble and thimble pixels in the image, and passing Sort the x-direction bit numbers of the card tray and ejection pin pixels by size. In Figure 2, the card tray ejection pin is in the second and third quadrants. The minimum value of the x-direction bit number of the card tray pixel is the card tray boundary. The ejection pin pixel in the x direction The minimum value of the bit number is the ejector pin boundary. The first image is represented by the card tray boundary as: Afterwards, the image pixel displacement is converted into actual displacement. Please refer to FIG. 7 , which shows a flow chart of an image pixel displacement-actual displacement conversion method in one or more embodiments of the present disclosure. The flow chart of converting the above image pixel displacement into actual displacement can be shown in Figure 7, where L represents the total duration of the picture, m represents the total number of frames, and the actual cartridge and ejection pin displacements are obtained based on the cartridge and ejection pin position data at a specific moment. Quantity data.

x1_1_min; at t*L/m milliseconds, the Cato pixel displacement is x_t, as shown in Formula 1:

dx_t＝x_1_min-x_t_min 1)

The ejector pixel displacement is dx1_t, as shown in Equation 2:

dx1_t＝x1_t_min-x1_1_min 2)

Mapping from the pixel displacement to the actual size, the Cato displacement is d1_t, as shown in Equation 3:

d1_t＝2*(dx_t/n)*d3 3)

The displacement of the ejector pin is d2_t, as shown in Formula 4:

d2_t＝2*(dx1_t/n)*d3 4)

Among them, d3 is half the length of the placement surface in the left and right directions.

Cato moment-displacement data: (t*L/m, d1_t);

Ejector time-displacement data: (t*L/m, d2_t),

In order to facilitate subsequent description, a simplified expression is given here:

T=t*L/m; K_T=d1_t; D_T=d1_t;

That is, the simplified Cato moment-displacement data is expressed as: (T, K_T);

The simplified ejector time-displacement data is expressed as: (T, D_T).

To further process the time-displacement data, use interpolation methods: polynomial interpolation or Hermitian interpolation or other interpolation methods to interpolate the data to obtain the time-displacement function during the movement of the card holder and the thimble: time during the movement of the card holder -The displacement function, that is, the time-displacement relationship of Cato, as shown in Equation 5:

K_T＝f(T) 5)

The time-displacement function during the movement of the ejector pin, that is, the time-displacement relationship of the ejector pin, is shown in Formula 6:

D_T＝g(T) 6)

In some embodiments, the method further includes: eliminating invalid pictures in the video of the pop-up process.

Specifically, the invalid picture in the video is a picture in which the ejector pin and the ejector pin do not produce pixel displacement. This picture cannot reflect the movement process of the ejector pin and the ejector pin over time.

Step S103: Obtain the critical moment when the tray reaches the critical point based on the time-displacement correlation of the tray, and based on the time-displacement correlation of the tray, the time-displacement correlation of the ejection pin, and the stiffness of the ejection rod during the ejection process of the tray. , obtain the ejection force of the ejector pin at the critical moment, where the critical point refers to the position where the flange of the cartridge faces the flange of the card holder spring piece.

Specifically, the ejection force is an important mechanical property in the card tray installation structure. When the ejection pin pushes the card tray's installation structure, the thrust force when the rod is ejected needs to be within a preset range to prevent the thrust force from being too large and causing the ejection force. Too large, making it difficult for the user to push out the tray. Please refer to FIG. 3 , which shows a schematic diagram of the cartridge displacement stage in one or more embodiments of the present disclosure, in which the ejection working condition is shown in FIG. 3(A) . As shown in Figure 3(c), there is a convex point between the card tray and the card holder spring piece. This bump is the flange of the card holder and the flange of the card holder spring piece. At the midpoint of the spring flange, this position is the critical point, and the ejection force is the force exerted by the ejector on the card holder when it passes the critical point. When the ejector pin is just inserted, as shown in Figure 3(A), the cartridge is in a slow crawling stage. Due to the excessive thrust, the deformation of the cartridge spring is mainly the longitudinal stretching of the entire spring, and the longitudinal stretching deformation is sufficient. To balance the strength limit of adults, before the card tray reaches the critical point, the lateral deformation process of the card base shrapnel is relatively slow. At this time, the card tray is affected by the squeezing force of the ejection stem on the card tray and the squeezing force of the card base shrapnel on the card tray. pressure. As the lateral deformation of the shrapnel increases, the resultant force gradually decreases, reaching the minimum at the critical point. After passing the critical point, the lateral deformation of the shrapnel begins to recover, and the resultant force begins to increase, indicating that there is an acceleration function pole at the critical point. The three derivatives of the time-displacement function during the movement of the Catuto are obtained to obtain the moment corresponding to the extreme point. This is the moment when the Catuto passes the critical point, and the moment when the Catoto ejects requires the minimum ejection force. When the stiffness of the ejection lever is large enough, the amount of push-in of the ejection pin is equal to the amount of ejection of the smart card; however, usually the ejection control lever and ejection lever will deform to a certain extent. The ejection can be obtained using elastic mechanics or finite element methods. The stiffness of the control rod and ejection rod, the product of deformation and stiffness is the ejection force, that is, at time T, F1(T)=(K_T-D_T)*k (distance moved by the card tray - distance moved by the ejection pin)*ejection rod the stiffness. Furthermore, when T=T0, the ejection force, F ejection, is obtained through F1(T)=(K_T-D_T)*k, the time-displacement relationship of the cartridge, and the time-displacement relationship of the ejection pin.

In one embodiment, the critical moment when the tray reaches the critical point is obtained based on the time-displacement correlation of the tray, and based on the time-displacement correlation of the tray, the time-displacement correlation of the ejection pin and the pop-up process. The stiffness of the rod can be used to obtain the ejection force of the ejector against the card holder at the critical moment, including:

Based on Cato's time-displacement correlation, the moment when Cato's acceleration is 0 is obtained. The moment when Cato's acceleration is 0 is the critical moment when Cato reaches the critical point.

Specifically, during the movement of the card holder, as the lateral deformation of the shrapnel increases, the resultant force gradually decreases. When it reaches the critical point of the shrapnel, the resultant force is minimum, and the acceleration of the Cato is 0. The first-order derivative can be used to find Cato's speed, the second-order derivative can be used to find Cato's acceleration, and the third-order derivative can be used to find the extreme value of acceleration. Through the time-displacement relationship of the Cato during the ejection process, that is, by deriving the time-displacement function of the Cato three times, we can know the moment when the acceleration is 0. The calculation method is as shown in Equation 7:

In some embodiments, after obtaining the time-displacement correlation relationship of the card tray during the card tray ejection process and the time-displacement correlation relationship of the ejection pin based on the ejection process video, the method further includes:

Based on the time-displacement correlation of the Cato, the deceleration moment when the Cato reaches the deceleration stage is obtained. According to the time-displacement correlation of the Cato, the quality of the Cato and the quality of the smart card during the deceleration process of the Cato, the deceleration moment of the Cato is obtained. of friction.

Specifically, the friction force of the card tray affects the force that the card tray receives after passing the critical moment. It is an important indicator that affects the card tray using experience. The friction force needs to be set within the preset range. If the friction force is too small, the card tray will directly Separate from electronic equipment. The card holder is not affected by the elastic force of the shrapnel and is only affected by the friction force, as shown in Figure 3(e). At this time, the card holder is decelerating, that is, during the deceleration stage, the time-displacement function during the card holder's movement is calculated three times. By derivation, the time period of the corresponding deceleration interval within the total video duration is obtained. The deceleration period is T = [T1, L]. By taking the quadratic derivation of the time-displacement function during the movement of the catto, the acceleration during the deceleration period can be obtained. The calculation method is as shown in Equation 8:

Then use the load-bearing hairpin to obtain the comprehensive mass M of the card holder and the smart card. According to Newton's second law, the friction force in the deceleration stage can be obtained. The calculation method of F friction is as shown in Equation 9:

FMo＝f”(T)*M,T＝[T1,L] 9)

In some embodiments, the deceleration moment when the Cato reaches the deceleration stage is obtained based on the time-displacement correlation of the Cato, and based on the time-displacement correlation of the Cato, the quality of the Cato, and the quality of the smart card during the deceleration process of the Cato, we obtain The friction force exerted on the Cato during deceleration includes:

Based on the time-displacement correlation of Cato, the moment when Cato's acceleration is less than 0 is obtained. The moment when Cato's acceleration is less than 0 is the deceleration time when Cato reaches the deceleration stage.

Specifically, during the movement of the Catuto, as the elastic force exerted by the Catuto becomes less and less, the Catuto is gradually affected only by friction, so the Catuto begins to decelerate, that is, the Catuto's acceleration is less than 0. The first-order derivative can be used to find Cato's speed, the second-order derivative can be used to find Cato's acceleration, and the third-order derivative can be used to find the extreme value of acceleration. Through the time-displacement relationship of the Cato during the ejection process, that is, by deriving the time-displacement function of the Cato three times, the moment when the acceleration is less than 0 can be known.

In one embodiment, after obtaining the time-displacement correlation relationship of the tray during the tray ejection process and the time-displacement correlation relationship of the ejection pin based on the ejection process video, the method further includes:

Based on the critical moment and deceleration time, the acceleration segment time after the Cato passes the critical point is obtained, and based on the time-displacement relationship of the Cato during the Cato acceleration process, the quality of the Cato and the quality of the smart card, the impact of the shrapnel on the Cato at the acceleration moment is obtained pop-up force.

Specifically, after the card tray passes the critical point, it continues to be affected by the combined force of the elastic force and friction of the shrapnel. At this time, the elastic force exerted by the shrapnel in the direction of movement of the card tray is an important indicator that affects the ejection speed of the card tray in the design structure. At this time, the card tray The elastic force is greater than the friction force on the card tray, and the card tray accelerates at this time. Combining the moment when the Cato reaches the critical point and the moment when the Cato decelerates, the acceleration segment moment after the Cato passes the critical point is obtained. The acceleration segment time is the ejection force of [T0, T1],

F bomb = F combination + F friction. That is, the F bomb is calculated as shown in Equation 10:

F bomb＝＝(f”(T1)+f”(T))*M 10)

Derive the time-displacement of Cato to get the acceleration during this period, and then use Newton's second law to get F+. Since F is known, F+-F+ can get the ejection force F.

In some embodiments, the acceleration segment moment after the Cato passes the critical point is obtained based on the critical time and the deceleration time, and the acceleration is obtained based on the time-displacement relationship of the Cato during the Cato acceleration process, the quality of the Cato, and the quality of the smart card. The ejection force of the shrapnel on the Cato at all times includes:

Based on the time-displacement correlation of Cato, the acceleration moment when Cato passes the critical point is obtained and the acceleration is greater than 0.

Specifically, as shown in Figure 3(d), after the card tray passes the critical point, it continues to receive the combined force of the elastic force and friction force of the shrapnel. At this time, the shrapnel exerts an elastic force in the direction of movement of the card tray, and at this time, the elastic force on the card tray is greater than The friction force exerted on the Cato is accelerating, that is, the acceleration of the Cato is greater than 0.

In a specific implementation, please refer to FIG. 8 , which shows a flow chart of a method for calculating ejection force, friction force, and ejection force in one or more embodiments of the present disclosure. As shown in Figure 8, the above-mentioned ejection force, friction force, and ejection force are calculated according to this process.

In summary, the method for measuring the mechanical properties of the smart card installation structure of communication equipment provided by this disclosure can obtain the time-displacement correlation of the card holder through the video of the card holder ejection process, and the time-displacement correlation of the ejection pin, based on the card holder and the ejection pin. The time-displacement relationship of the ejector pin obtains the ejector force of the ejector pin. Through this method, the parameters that affect the mechanical indicators of the card holder can be separated, thereby achieving accurate verification of the main factors that affect the mechanical performance of the smart card installation mechanism, eliminating a large amount of test verification and production costs. At the same time, the problem of calculation error in the ejection force in the original technology is solved.

It should be understood that although various steps in the flowchart of FIG. 1 are shown in sequence as indicated by arrows, these steps are not necessarily executed in the order indicated by arrows. Unless explicitly stated in this article, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in Figure 1 may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but may be executed at different times. The execution of these sub-steps or stages The sequence is not necessarily sequential, but may be performed in turn or alternately with other steps or sub-steps of other steps or at least part of the stages.

Please refer to FIG. 4 , which shows a structural block diagram of a mechanical property measurement system for a smart card installation structure of a communication device in one or more embodiments of the present disclosure. As shown in Figure 4, the smart card installation structure mechanical properties measurement system 200 of the communication device includes: a video acquisition module 210, a relationship generation module 220, and an ejection force calculation module 230.

The video acquisition module 210 is used to acquire the ejection process video during the ejection process of the card tray;

The relationship generation module 220 is used to obtain the time-displacement correlation relationship of the card tray during the card tray ejection process and the time-displacement correlation relationship of the ejection pin based on the ejection process video;

The ejection force calculation module 230 is used to obtain the critical moment when the cartridge reaches the critical point based on the time-displacement relationship of the cartridge, and based on the time-displacement relationship of the cartridge and the time-displacement relationship of the ejection pin during the ejection process of the cartridge. And the stiffness of the ejection rod is used to obtain the ejection force of the ejection needle at the critical moment.

In one embodiment, the relationship generation module 220 also includes:

Read each frame of image and sampling time in the video of the pop-up process;

In summary, the smart card installation structure mechanical properties measurement system of communication equipment provided by the present disclosure obtains the time-displacement correlation of the card holder through the video of the card holder ejection process, and the time-displacement correlation of the ejection pin, based on the card holder and the ejection pin. The time-displacement relationship of the ejector pin obtains the ejector force of the ejector pin. The parameters that affect the mechanical indicators of the card holder can be separated, thereby achieving accurate verification of the main factors that affect the mechanical performance of the smart card installation mechanism, eliminating a large amount of test verification and production costs. At the same time, the problem of calculation error in the ejection force in the original technology is solved.

Regarding the specific limitations of the mechanical characteristics measurement system for a smart card installation structure of a communication device, please refer to the corresponding limitations of the mechanical characteristics measurement method of a smart card installation structure of a communication equipment mentioned above, which will not be described again here. Each module in the above-mentioned application launching system of a mobile terminal can be implemented in whole or in part by software, hardware and combinations thereof. Each of the above modules may be embedded in or independent of the processor of the computer device in the form of hardware, or may be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

Please refer to FIG. 5 , which shows an internal structure diagram of a terminal device in one or more embodiments of the present disclosure. The internal structure diagram of the terminal device can be shown in Figure 5. The terminal device includes a processor, memory, communication interface, display screen and input device connected through a system bus. Among them, the processor of the terminal device is used to provide computing and control capabilities. The memory of the terminal device includes non-volatile storage media and internal memory. The non-volatile storage medium stores operating systems and computer programs. This internal memory provides an environment for the execution of operating systems and computer programs in non-volatile storage media. The communication interface of the terminal device is used for wired or wireless communication with external terminals. The wireless mode can be through Wireless-Fidelity (WIFI), operator network, Near Field Communication (NFC) or Other technical implementations. The computer program implements an application opening method when executed by the processor. The display screen of the terminal device can be a liquid crystal display screen or a communication ink display screen. The input device of the terminal device can be a touch layer covered on the display screen, or it can be a button, trackball or touch pad provided on the shell of the terminal device. , it can also be an external keyboard, trackpad or mouse, etc.

Those skilled in the art can understand that the structure shown in Figure 5 is only a block diagram of a partial structure related to the disclosed solution, and does not constitute a limitation on the terminal equipment to which the disclosed solution is applied. Specific communication devices may include There may be more or fewer parts than shown, or certain parts may be combined, or may have a different arrangement of parts.

In one embodiment, the system for measuring mechanical properties of a smart card installation structure of a communication device provided by the present disclosure can be implemented in the form of a computer program, and the computer program can run on the computer device as shown in FIG. 5 . The memory of the computer device can store various program modules that make up the mechanical properties measurement system of the smart card installation structure of the communication device, such as the video acquisition module, relationship generation module, and ejection force calculation module shown in Figure 4. The computer program composed of each program module causes the processor to execute the steps of the method for measuring mechanical characteristics of a smart card installation structure of a communication device according to various embodiments of the present disclosure described in this specification.

For example, the mobile terminal shown in Figure 5 can perform the video acquisition process for obtaining the ejection process video of the card tray through the video acquisition module of the mechanical properties measurement system of a smart card installation structure of a communication device as shown in Figure 4 . The relationship generation module is executed to obtain the time-displacement correlation relationship of the card tray during the card tray ejection process and the time-displacement correlation relationship of the ejection pin based on the video of the pop-up process. The ejection force calculation module is executed to obtain the critical moment when the card tray reaches the critical point based on the time-displacement correlation relationship of the card tray, and based on the time-displacement relationship of the card tray and the time of the ejection pin during the card tray ejection process. -The displacement relationship and the stiffness of the ejection rod are used to obtain the ejection force of the ejection pair on the card holder at the critical moment.

In one embodiment, a terminal device is provided, including a memory and a processor. The memory stores a computer program. When the processor executes the computer program, it implements the following steps: obtaining a video of the ejection process during the card tray ejection; based on the According to the video of the pop-up process, the time-displacement relationship of the card tray during the pop-up process of the card tray is obtained, as well as the time-displacement relationship of the ejection pin; based on the time-displacement relationship of the card tray, the critical point of the card tray is obtained. The critical moment, and according to the time-displacement relationship of the card tray, the time-displacement relationship of the ejection pin and the stiffness of the ejection rod during the card tray ejection process, the ejection force of the ejection needle of the card tray at the critical moment is obtained .

In one embodiment, based on the ejection process video, the time-displacement correlation relationship of the card tray during the card tray ejection process and the time-displacement correlation relationship of the ejection pin are obtained, including:

Read each frame of image and sampling time in the video of the pop-up process;

In summary, the terminal device provided by the present disclosure can obtain the time-displacement relationship of the card tray and the time-displacement relationship of the ejection pin through the video of the card tray ejection process, and obtain the ejection time-displacement relationship based on the time-displacement relationship of the card tray and the ejection pin. Aiming at the ejection force of the Cato. Through this method, the parameters that affect the mechanical indicators of the card holder can be separated, thereby achieving accurate verification of the main factors that affect the mechanical performance of the smart card installation mechanism, eliminating a large amount of test verification and production costs. At the same time, the problem of calculation error in the ejection force in the original technology is solved.

In one embodiment, a non-transitory computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented: obtain a video of the ejection process during the card tray ejection process; based on the According to the video of the pop-up process, the time-displacement relationship of the card tray during the pop-up process of the card tray is obtained, as well as the time-displacement relationship of the ejection pin; based on the time-displacement relationship of the card tray, the critical point of the card tray is obtained. The critical moment, and according to the time-displacement relationship of the card tray, the time-displacement relationship of the ejector pin and the stiffness of the ejection rod during the card tray ejection process, the ejection force of the ejector needle of the card tray at the critical moment is obtained , wherein the critical point refers to the position where the flange of the card tray faces the flange of the card seat elastic piece.

Read each frame of image and sampling time in the video of the pop-up process;

In summary, the present disclosure provides a non-transitory computer-readable storage medium that obtains the time-displacement correlation relationship of the tray and the time-displacement correlation relationship of the ejection pin through the video of the tray ejection process. Based on the tray and the The time-displacement relationship of the ejector pin obtains the ejector force of the ejector pin. Through this method, the parameters that affect the mechanical indicators of the card holder can be separated, thereby achieving accurate verification of the main factors that affect the mechanical performance of the smart card installation mechanism, eliminating a large amount of test verification and production costs. At the same time, the problem of calculation error in the ejection force in the original technology is solved.

In one embodiment, a computer program product is provided. When instructions in the computer program product are executed by a processor of a terminal device, the terminal device can perform the following steps: obtain a video of the ejection process during the card tray ejection process; based on From the video of the ejection process, the time-displacement relationship of the card tray during the card tray ejection process and the time-displacement relationship of the ejection pin are obtained; based on the time-displacement relationship of the card tray, the critical state of the card tray is obtained. The critical moment of the point, and based on the time-displacement relationship of the card tray, the time-displacement relationship of the ejection pin and the stiffness of the ejection rod during the card tray ejection process, the ejection point of the ejection pair of the card tray at the critical moment is obtained. Output, wherein the critical point refers to the position where the flange of the card holder is facing the flange of the card seat elastic piece.

In one embodiment, based on the ejection process video, the time-displacement correlation relationship of the cartridge during the cartridge ejection process and the time-displacement correlation relationship of the ejection pin are obtained, including:

Read each frame of image and sampling time in the video of the pop-up process;

In summary, through the video of the card tray ejection process, the time-displacement relationship of the card tray and the time-displacement relationship of the ejector pin are obtained. Based on the time-displacement relationship of the card tray and the ejector pin, the ejection force of the ejector needle against the card tray is obtained. This method can separate the parameters that affect the mechanical indicators of the card holder, thereby achieving accurate verification of the main factors that affect the mechanical performance of the smart card installation mechanism, eliminating a large amount of test verification and production costs. At the same time, the problem of calculation error in the ejection force in the original technology is solved.

Embodiments of the present disclosure also provide an application publishing platform, wherein the application publishing platform is used to publish a computer program product, wherein when the computer program product is run on a computer, part or all of the methods in the above method embodiments are implemented. step.

Embodiments of the present disclosure also provide a computer-readable storage medium that stores a computer program, wherein when the computer program is executed by a processor, some or all of the steps of the method in each of the above method embodiments are implemented.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. , when executed, the computer program may include the processes of the above method embodiments. Any reference to memory, database or other media used in the various embodiments provided by this disclosure may include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory may include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as Static Random Access Memory (SRAM) and Dynamic Random Access Memory (DRAM).

The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-described embodiments only express several implementation modes of the present disclosure, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all fall within the protection scope of the present disclosure. Therefore, the protection scope of the patent disclosed shall be determined by the appended claims.

Industrial applicability

The disclosure provides a method for measuring the mechanical properties of a smart card installation structure of a communication device. The communication device obtains the time-displacement correlation of the card holder through the video of the card holder ejection process, and the time-displacement correlation of the ejection pin, based on the time of the card holder and the ejection pin. -The displacement relationship obtains the ejection force of the ejector against the card holder. Through this method, the parameters that affect the mechanical indicators of the card holder can be separated, thereby achieving accurate verification of the main factors that affect the mechanical performance of the smart card installation mechanism, eliminating a large amount of test verification and production costs, and at the same time solving the problems encountered in the original technology. It solves the calculation error problem and has strong industrial applicability.

Claims

A method for measuring the mechanical properties of a smart card installation structure of communication equipment, wherein the smart card installation structure includes a card holder, a card holder, a card holder shrapnel, a PCB board, and a shell material. The method of measuring the mechanical characteristics of a smart card installation structure of communication equipment includes :

Get the video of the ejection process of the card tray;

Based on the video of the ejection process, the time-displacement correlation relationship of the card holder during the card holder ejection process, and the time-displacement correlation relationship of the ejection pin are obtained;

Based on the time-displacement correlation of the tray, the critical moment when the tray reaches the critical point during the ejection process is obtained, and based on the time-displacement correlation of the tray and the time-displacement correlation of the ejection pin during the ejection process of the tray, and the stiffness of the ejection rod to obtain the ejection force of the ejector pair and the card holder at the critical moment,

Wherein, the critical point refers to the position where the flange of the card tray faces the flange of the card seat elastic piece.
The method according to claim 1, wherein, based on the ejection process video, obtaining the time-displacement correlation relationship of the cartridge during the cartridge ejection process, and the time-displacement correlation relationship of the ejection pin, including:

Read each frame of image and sampling time in the video of the pop-up process;

Identify the pixels of the card tray and the pixels of the thimble from each frame of the image;

According to the sampling time of each frame of image and the pixel points of the tray and the pixel points of the ejection pin, the time-displacement correlation relationship of the tray and the time-displacement correlation relationship of the ejection pin are respectively obtained.
The method according to claim 1 or 2, wherein the critical moment when the Cato reaches the critical point is obtained based on the time-displacement correlation relationship of the Cato, and based on the time-displacement of the Cato during the ejection process of the Cato The displacement correlation relationship, the time-displacement correlation relationship of the ejector pin and the stiffness of the ejection rod are used to obtain the ejection force of the ejector pin on the card holder at the critical moment, including:

The moment when the Cato acceleration is 0 is obtained based on the time-displacement correlation of the Cato, and the time when the Cato acceleration is 0 is the critical moment when the Cato reaches the critical point.
The method according to claim 1 or 2, wherein, after obtaining the time-displacement correlation relationship of the tray during the tray ejection process and the time-displacement correlation relationship of the ejection pin based on the ejection process video, it also includes:

The deceleration moment when the card tray reaches the deceleration stage is obtained based on the time-displacement correlation relationship of the card tray, and based on the time-displacement correlation relationship of the card tray, the quality of the card tray and the quality of the smart card during the deceleration process of the card tray, we obtain The friction force experienced by the card holder at the moment of deceleration.
The method of claim 4, wherein the deceleration moment when the Cato reaches the deceleration stage is obtained based on the time-displacement correlation of the Cato, and the time-displacement correlation of the Cato during the deceleration process of the Cato is The friction force on the card holder at the deceleration moment is obtained by the relationship between the quality of the card holder and the quality of the smart card, including:

The time when the Cato acceleration is less than 0 is obtained based on the time-displacement relationship of the Cato. The time when the Cato acceleration is less than 0 is the deceleration time when the Cato reaches the deceleration stage.
The method according to claim 1 or 2, wherein, after obtaining the time-displacement correlation relationship of the tray during the tray ejection process and the time-displacement correlation relationship of the ejection pin based on the ejection process video, it also includes:

The acceleration segment moment after the card tray passes the critical point is obtained based on the critical moment and the deceleration time, and based on the time-displacement relationship of the card tray, the quality of the card tray and the quality of the smart card during the acceleration process of the card tray, the obtained result is obtained The ejection force of the shrapnel on the card holder at the acceleration moment.
The method according to claim 6, wherein the acceleration segment moment after the Cato passes the critical point is obtained based on the critical time and the deceleration time, and based on the time-displacement correlation relationship of the Cato during the Cato acceleration process, The mass of the card holder and the quality of the smart card are used to obtain the ejection force of the shrapnel on the card holder at the acceleration moment, including:

Based on the time-displacement correlation relationship of the Cato, it is obtained that the acceleration moment when the Cato passes through the critical point is greater than 0.
A system for measuring mechanical properties of a smart card installation structure of communication equipment, which includes:

The video acquisition module obtains the ejection process video of the card tray during the ejection process;

A relationship generation module, based on the ejection process video, obtains the time-displacement correlation relationship of the card tray during the card tray ejection process, and the time-displacement correlation relationship of the ejection pin;

The ejection force calculation module obtains the critical moment when the cartridge reaches the critical point based on the time-displacement relationship of the cartridge, and based on the time-displacement relationship of the cartridge and the time-displacement relationship of the ejection pin during the cartridge ejection process The relationship and the stiffness of the ejection rod are used to obtain the ejection force of the ejector pair of the card holder at the critical moment.
The system according to claim 8, wherein the relationship generation module includes: a first reading unit, a first identification unit and a first acquisition unit;

The first reading unit is used to read each frame of image and sampling time in the pop-up process video;

The first identification unit is used to identify the pixels of the card tray and the pixels of the ejection pin from each frame of the image;

The first acquisition unit is used to obtain the time-displacement correlation relationship of the tray and the time-displacement correlation relationship of the ejector according to the sampling time of each frame of the image and the pixel points of the tray and the pixel points of the ejector.
The system according to claim 8 or 9, wherein the ejection force calculation module is further used to obtain the moment when the Cato acceleration is 0 based on the time-displacement correlation relationship of the Cato, and the Cato acceleration is 0 The moment is the critical moment when the Cato reaches the critical point.
The system according to claim 8 or 9, wherein the system further includes:

The friction force acquisition module is used to obtain the time-displacement correlation relationship of the card tray during the pop-up process of the card tray based on the video of the pop-up process, and the time-displacement correlation relationship of the ejection pin, based on the time-displacement relationship of the card tray. The displacement correlation relationship obtains the deceleration moment when the card tray reaches the deceleration stage, and according to the time-displacement correlation relationship of the card tray, the quality of the card tray and the quality of the smart card during the deceleration process of the card tray, the card holder at the deceleration moment is obtained. The friction force experienced by the support.
The system according to claim 11, wherein the friction force acquisition module is further configured to obtain the time when the Cato acceleration is less than 0 based on the time-displacement correlation relationship of the Cato, and the time when the Cato acceleration is less than 0 It is the deceleration time when the Cato reaches the deceleration stage.
The system according to claim 8 or 9, wherein the device further includes:

An ejection force acquisition module, configured to obtain the time-displacement correlation of the card holder during the card holder ejection process and the time-displacement correlation of the ejection pin based on the video of the ejection process, and obtain the ejection force based on the critical moment and the ejection force. At the deceleration moment, the acceleration segment moment after the card tray passes the critical point is obtained, and based on the time-displacement relationship of the card tray, the quality of the card tray and the quality of the smart card during the acceleration process of the card tray, the impact of the shrapnel on the said card tray at the acceleration moment is obtained. The ejection force of the card tray.
The system according to claim 13, wherein the ejection force acquisition module is further configured to obtain the acceleration moment when the card tray passes the critical point based on the time-displacement correlation relationship of the card tray and is greater than 0.
A terminal device, which includes a processor and a memory. The memory stores at least one instruction, at least a program, a code set, or an instruction set. The instruction, the program, the code set, or the instruction set. It is loaded and executed by the processor to implement the method for measuring the mechanical properties of a smart card installation structure of a communication device according to any one of claims 1 to 7.
A computer program product, wherein, when instructions in the computer program product are executed by a processor of a terminal device, the terminal device is able to execute the smart card installation structure of the communication device according to any one of claims 1-7 Methods for measuring mechanical properties.
A computer-readable storage medium, the computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the mechanical characteristics of the smart card installation structure of the communication device as claimed in any one of claims 1-7 are realized. Measurement methods.