Method and system for measuring mechanical properties of a smart card mounting structure of a communication device

Abstract

The application relates to the field of mechanical assembly process technology measurement, and provides a smart card installation structure mechanical property measurement method, system, terminal equipment and product of a communication device. The method comprises the following steps: acquiring a pop-out process video in a card holder pop-out process; based on the pop-out process video, obtaining a time-displacement correlation relationship of a card holder in the card holder pop-out process and a time-displacement correlation relationship of a thimble; obtaining a critical moment when the card holder reaches a critical point based on the time-displacement correlation relationship of the card holder, and obtaining the ejection force of the thimble on the card holder at the critical moment according to the time-displacement correlation relationship of the card holder in the card holder pop-out process, the time-displacement correlation relationship of the thimble and the stiffness of an ejection rod. The method can accurately and precisely measure the mechanical properties of a smart card card holder structure, and is convenient for checking main factors influencing the mechanical properties of the structure.

Description

Technical Field

[0001] This application 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 mounting structure in a communication device. Background Technology

[0002] In modern society, communication devices have become indispensable tools in people's lives. When using a communication device, a smart card needs to be placed in the device's SIM card tray, and then the tray, along with the smart card, is inserted into the mobile phone. When replacing or installing a smart card, the SIM card tray needs to have sufficient ejection space for easy installation.

[0003] In the design of existing mounting structures, the inability to accurately and precisely measure their mechanical properties, and the inability to effectively decouple and separate various mechanical indicators, necessitates extensive experimental verification to identify the main factors affecting the mechanical performance of the SIM card mounting structure. Consequently, numerous experiments are required to verify these mechanical indicators, leading to increased production costs. Furthermore, the inability to isolate and study various mechanical indicators makes it difficult for the mechanical performance of the SIM card mounting structure to meet requirements within the predetermined timeframe, severely impacting product delivery cycles. Elastic force, friction force, and ejection force are crucial mechanical properties of the mounting structure. Accurately obtaining the relationship between the various mechanical properties contributed by the mounting structure and the card holder displacement during actual operation is a key factor in identifying problems with the mechanical performance of the mounting structure. Figure 6 As shown, the existing index measurement method does not take into account factors such as the deformation of the pop-out control lever and the pop-out lever. The pop-out force is equivalent to the pressing force, but there is a significant difference between the pressing force and the pop-out force corresponding to the pressing force, which cannot reflect the true index. In addition, the testing process is cumbersome. Summary of the Invention

[0004] Therefore, it is necessary to provide a method for accurately and precisely measuring the mechanical properties of smart card structures to address the aforementioned technical problems, thereby realizing a method, system, terminal equipment, and product for measuring the mechanical properties of smart card mounting structures in communication devices that measure various mechanical indicators.

[0005] This application provides a method for measuring the mechanical properties of a smart card mounting structure in a communication device. The smart card mounting structure includes a card tray, a card socket, a card socket spring, a PCB board, and a housing. The method for measuring the mechanical properties of the smart card mounting structure in the communication device includes:

[0006] Obtain the video of the ejection process of the cassette;

[0007] Based on the video of the ejection process, the time-displacement relationship of the card tray and the time-displacement relationship of the ejector pin during the ejection process are obtained.

[0008] Based on the time-displacement correlation of the card tray, the critical moment when the card tray reaches the critical point is obtained. Based on the time-displacement correlation of the card tray, the time-displacement correlation of the ejector pin, and the stiffness of the ejector rod during the ejection process, the ejection force of the ejector pin at the critical moment is obtained. The critical point refers to the position where the flange of the card tray is directly opposite the flange of the card holder spring.

[0009] In some embodiments, obtaining the time-displacement relationship of the tray and the time-displacement relationship of the ejector pin during the ejection process based on the ejection process video includes:

[0010] Read each frame and sampling time from the pop-up process video;

[0011] Identify the pixels of the cassette and the pixels of the ejector pin from each frame of the image;

[0012] Based on the sampling time of each frame of the image and the pixels of the cassette and the pin, the time-displacement relationship of the cassette and the time-displacement relationship of the pin are obtained respectively.

[0013] Specifically, the step of obtaining the critical moment when the card tray reaches the critical point based on the time-displacement correlation of the card tray, and obtaining the pushing force of the ejector pin on the card tray at the critical moment based on the time-displacement correlation of the card tray during ejection, the time-displacement correlation of the ejector pin, and the stiffness of the ejector rod, includes:

[0014] The moment when Cato's acceleration is 0 is obtained based on the time-displacement correlation of the Cato, and the moment when Cato's acceleration is 0 is the critical moment when the Cato reaches the critical point.

[0015] Furthermore, after obtaining the time-displacement relationship of the cartridge and the time-displacement relationship of the ejector pin during the ejection process based on the ejection process video, the method further includes:

[0016] Based on the time-displacement correlation of the card holder, the deceleration time when the card holder reaches the deceleration stage is obtained, and based on the time-displacement correlation of the card holder, the mass of the card holder, and the mass of the smart card during the deceleration process, the frictional force on the card holder at the deceleration time is obtained.

[0017] In some embodiments, the deceleration time when the card tray reaches the deceleration phase is obtained based on the time-displacement correlation of the card tray, and the frictional force experienced by the card tray at the deceleration time is obtained based on the time-displacement correlation of the card tray during the deceleration process, the mass of the card tray, and the mass of the smart card, including:

[0018] Based on the time-displacement correlation of the Cato, the moment when the Cato acceleration is less than 0 is obtained, and the moment when the Cato acceleration is less than 0 is the deceleration moment when the Cato reaches the deceleration phase.

[0019] Specifically, after obtaining the time-displacement relationship of the tray and the time-displacement relationship of the ejector pin during the ejection process based on the ejection process video, the process further includes:

[0020] Based on the critical moment and the deceleration moment, the acceleration phase moment after the card passes the critical point is obtained, and according to the time-displacement correlation of the card during the acceleration process, the mass of the card and the mass of the smart card, the ejection force of the spring on the card at the acceleration moment is obtained.

[0021] Furthermore, based on the critical moment and the deceleration moment, the acceleration phase moment after the card passes the critical point is obtained, and according to the time-displacement correlation of the card during acceleration, the mass of the card, and the mass of the smart card, the ejection force of the spring on the card at the acceleration moment is obtained, including:

[0022] Based on the time-displacement correlation of the Cato, the acceleration at the moment of acceleration when the Cato passes through the critical point is greater than 0.

[0023] This application provides a system for measuring the mechanical properties of a smart card mounting structure in a communication device, comprising:

[0024] The video acquisition module acquires the video of the ejection process during the ejection of the card tray;

[0025] The relationship generation module, based on the pop-out process video, obtains the time-displacement relationship of the card tray during the pop-out process, as well as the time-displacement relationship of the ejector pin;

[0026] The ejection force calculation module obtains the critical moment when the card reaches the critical point based on the time-displacement correlation of the card, and obtains the ejection force of the ejector pin on the card at the critical moment according to the time-displacement correlation of the card, the time-displacement correlation of the ejector pin and the stiffness of the ejector rod during the ejection process.

[0027] This application provides a terminal device, including a processor and a memory. The memory stores at least one instruction, at least one program, a code set, or an instruction set. The instruction, program, code set, or instruction set is loaded and executed by the processor. This application also provides a method for measuring the mechanical properties of a smart card mounting structure of a communication device.

[0028] This application provides a computer program product that, when the instructions in the computer program product are executed by the processor of a terminal device, enables the terminal device to execute a method for measuring the mechanical properties of a smart card mounting structure of a communication device provided in any embodiment of this application.

[0029] The method, system, terminal equipment, and product for measuring the mechanical properties of smart card mounting structures in communication devices provided in this application obtain the time-displacement correlation of the card tray and the ejector pin through video of the card tray ejection process. Based on the time-displacement correlation of the card tray and the ejector pin, the ejection force of the ejector pin on the card tray is obtained. This method can separate the parameters affecting the mechanical properties of the card tray, thereby achieving accurate verification of the main factors affecting the mechanical performance of the smart card mounting mechanism, eliminating significant experimental verification and production costs. It also solves the problem of calculation error in the ejection force in existing technologies. Attached Figure Description

[0030] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0031] Figure 1 This is a flowchart illustrating a method for measuring the mechanical properties of a smart card mounting structure in a communication device, as shown in one embodiment.

[0032] Figure 2 This is a schematic diagram of the ejector pin displacement measurement and the chuck displacement measurement in one embodiment;

[0033] Figure 3 This is a schematic diagram of the Cato displacement stage in one embodiment;

[0034] Figure 4 A structural block diagram of a smart card mounting structure mechanical property measurement system for a communication device in one embodiment;

[0035] Figure 5 This is an internal structure diagram of a terminal device in one embodiment;

[0036] Figure 6 This is the existing method for testing top output force.

[0037] Figure 7 This is a flowchart of an image pixel displacement-actual displacement conversion method in one embodiment;

[0038] Figure 8 This is a flowchart illustrating the calculation method for ejection force, friction force, and ejection force in one embodiment. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0040] In one embodiment, such as Figure 1 As shown, a method for measuring the mechanical properties of a smart card mounting structure in a communication device is provided. This embodiment illustrates the application of this method to a communication device, but it is understood that the method can also be applied to servers or terminal devices, and further to systems including terminals and servers, implemented through interaction between the terminal and the server. Here, the type of smart card is not limited; cards with predetermined functions can be placed according to the function of the card tray. Optionally, the smart card can be a SIM card, SD card, TF card, or memory card. In this embodiment, the privacy protection method for the terminal device includes the following steps:

[0041] Step S101: Obtain the video of the ejection process during the ejection of the card tray.

[0042] Specifically, a high-speed camera is used to record the process of the ejector pin pushing out the communication device's card tray. For example... Figure 2 As shown, the communication device needs to be positioned at the center of the recording surface of the high-speed camera. The surface should be a solid color, and the colors of the surface, the ejector pin, and the card tray should be different for each pair, so that the high-speed camera can distinguish the movement trajectories of the surface, the ejector pin, and the card tray. The color of the surface is not limited here; optionally, the surface can be red, the card tray blue, and the ejector pin red. Before the ejector pin presses down on the communication device, the high-speed camera is turned on. The ejector pin is pushed using a fixture until the card tray is fully ejected. Once the card tray is fully ejected, the high-speed camera stops recording and saves the video in a preset format. The video is then decomposed frame by frame into images in a preset format using Python's imageio module. The preset formats for the video and images are not limited here; preferably, the video is saved in .avi or .mp4 format, and the images are saved in .jpg or .png format.

[0043] Step S102: Based on the ejection process video, obtain the time-displacement relationship of the card tray and the time-displacement relationship of the ejector pin during the ejection process.

[0044] Specifically, the video recorded by a high-speed camera can obtain the displacement of the cassette and the ejector pin within a preset time period. Based on the displacement of the cassette within the preset time period, the time-displacement function during the cassette's movement can be obtained, i.e., the time-displacement relationship of the cassette; similarly, based on the displacement of the ejector pin within the preset time period, the time-displacement function during the ejector pin's movement can be obtained, i.e., the time-displacement relationship of the ejector pin.

[0045] In some embodiments, obtaining the time-displacement relationship of the tray and the time-displacement relationship of the ejector pin during the ejection process based on the ejection process video includes:

[0046] Read each frame and sampling time from the pop-up process video;

[0047] Identify the pixels of the cassette and the pixels of the ejector pin from each frame of the image;

[0048] Based on the sampling time of each frame of the image and the pixels of the cassette and the pin, the time-displacement relationship of the cassette and the time-displacement relationship of the pin are obtained respectively.

[0049] Specifically, the system reads images captured by the high-speed camera and converted to a preset format. This includes all images taken after the ejector pin is pushed using a fixture until the cartridge is fully ejected. Image and time information is read from all images. Because the cartridge pin and ejector pin are different colors from the placement surface, their positions can be represented by RGB arrays. For example, the RGB array for gray is [128, 128, 128], the RGB array for the cartridge pin color is [a, b, c], and the RGB array for the ejector pin color is [a1, b1, d1], where a, b, c, a1, b1, c1 belong to [0, 255]. The high-speed camera is facing... Figure 2 The placement surface is centered, and the pixel positions are arranged in a matrix, assuming a total of n*n pixels. The side length of the placement surface is L. The pixel coordinates of the card holder and the pin are identified by [x, y], where x and y belong to [-n / 2, n / 2] and are integers. 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.

[0050] In the t-th frame of the image, i.e., at t*L / m milliseconds, the position of the caddie pixel is represented by [x_t, y_t], the pop-out amount is represented by the minimum value of x_t, and the displacement of the caddie is d1_t; the position of the pin pixel is represented by [x1_t, y1_t], the pop-out amount is represented by the maximum value of x1_t, and the displacement of the pin is d2_t.

[0051] For example, assuming a video duration of 1 second and a total of 30 frames, the first frame represents 1 / 30 of a second. For this first image within the video duration, the process iterates through all pixels, reading their RGB values ​​and comparing them with the RGB values ​​of the pins and trays. This identifies all pin and tray pixels in the image. The pixels are then sorted by their x-axis position. Figure 2The Cato pin is located in the second and third quadrants. The minimum x-direction bit number of the Cato pixel is the Cato boundary, and the minimum x-direction bit number of the pin pixel is the pin boundary. For the first image, the Cato boundary is represented as x_1_min, and the pin boundary as x1_1_min. At time t*L / m milliseconds, the Cato boundary is represented as x_t_min, and the pin boundary as x1_t_min. This process continues until all images within the video duration are detected. The flowchart for converting image pixel displacement to actual displacement is as follows: Figure 7 As shown, L represents the total duration of the image, m represents the total number of frames, and the actual displacement data of the card holder and ejector pin is obtained based on the position data of the card holder and ejector pin at a specific moment.

[0052] At time x1_1_min; t*L / m milliseconds, the Cato pixel displacement is x_t, as shown in Formula 1:

[0053] dx_t=x_1_min-x_t_min1)

[0054] The pixel displacement of the pin is dx1_t, as shown in Formula 2:

[0055] dx1_t=x1_t_min-x1_1_min2)

[0056] The caddie displacement is mapped from the pixel displacement to the actual size, and is d1_t, as shown in Formula 3:

[0057] d1_t=2*(dx_t / n)*d33)

[0058] The displacement of the ejector pin is d2_t, as shown in Formula 4:

[0059] d2_t=2*(dx1_t / n)*d34)

[0060] Where d3 is half the length of the placement surface in the left-right direction.

[0061] Cato time-displacement data: (t*L / m, d1_t);

[0062] Ejector moment-displacement data: (t*L / m, d2_t).

[0063] For ease of subsequent description, a simplified version is provided here:

[0064] T=t*L / m; K_T=d1_t; D_T=d1_t;

[0065] That is, the simplified Cato time-displacement data is represented as: (T, K_T);

[0066] The simplified ejector pin moment-displacement data is represented as: (T, D_T).

[0067] Further processing of the time-displacement data involves interpolation methods: polynomial interpolation, Homme interpolation, or other interpolation methods are used to interpolate the data, obtaining the time-displacement function during the movement of the Cato and ejector pin. The time-displacement relationship of the Cato during its movement is shown in Formula 5.

[0068] K_T=f(T)5)

[0069] The time-displacement function during the movement of the ejector pin, that is, the relationship between the time and displacement of the ejector pin, is shown in Formula 6:

[0070] D_T=g(T)6)

[0071] In some embodiments, the method further includes: removing invalid images from the pop-up process video.

[0072] Specifically, invalid images in the video are those where the ejector pin and the tray do not produce pixel displacement, and these images cannot reflect the movement process of the tray and ejector pin over time.

[0073] Step S103: Based on the time-displacement correlation of the card tray, obtain the critical moment when the card tray reaches the critical point, and according to the time-displacement correlation of the card tray, the time-displacement correlation of the ejector pin, and the stiffness of the ejector rod during the ejection process, obtain the ejection force of the ejector pin on the card tray at the critical moment, wherein the critical point refers to the position where the flange of the card tray is directly opposite the flange of the card holder spring.

[0074] Specifically, ejection force is a crucial mechanical property in the card holder mounting structure. It refers to the thrust exerted by the ejector rod when the ejector pin pushes the card holder's mounting structure. This thrust needs to be within a preset range to prevent excessive thrust and thus excessive ejection force, making it difficult for the user to eject the card holder. The ejection process should be as follows: Figure 3 As shown in (a). Figure 3 As shown in (c), the card holder and the card holder spring have a protrusion, which is the flange of the card holder and the flange of the card holder spring. When the midpoint of the flange of the card holder moves to the midpoint of the flange of the card holder spring, this position is the critical point. The ejection force is the force applied to the card holder by the ejector pin when the card holder passes the critical point. When the ejector pin is just inserted, as... Figure 3As shown in (a), the cassette is in a slow crawling phase. Due to the excessive thrust, the deformation of the cassette spring is mainly the longitudinal stretching of the entire spring. The longitudinal stretching deformation is sufficient to balance the strength limit of an adult. Therefore, before the cassette reaches the critical point, the lateral deformation of the cassette spring is relatively slow. At this time, the cassette is subjected to the squeezing force of the ejector and the squeezing force of the cassette spring. As the lateral deformation of the spring increases, the resultant force gradually decreases, reaching a minimum at the critical point. After passing the critical point, the lateral deformation of the spring begins to recover, and the resultant force begins to increase, indicating that there is an extreme point of the acceleration function at the critical point. Taking the third derivative of the time-displacement function during the cassette's motion yields the time corresponding to the extreme point. This is the moment when the cassette passes the critical point, which is the moment when the cassette requires the minimum ejection force. When the stiffness of the ejector rod is sufficiently large, the amount of the ejector pin pressed in is equal to the amount of the smart card ejected. However, under normal circumstances, the ejector control rod and the ejector rod will undergo a certain degree of deformation. The stiffness of the ejector control rod and the ejector rod can be obtained using elasticity mechanics or finite element methods. The product of deformation and stiffness is the ejection force, that is, at time T, F1(T) = (K_T - D_T) * k, (distance of card travel - distance of ejector pin travel) * stiffness of the ejector rod. Furthermore, when T = T0, the ejection force F_top can be obtained through F1(T) = (K_T - D_T) * k, the time-displacement relationship of the card traveler, and the time-displacement relationship of the ejector pin.

[0075] In one embodiment, obtaining the critical moment when the card tray reaches the critical point based on the time-displacement correlation of the card tray, and obtaining the pushing force of the ejector pin on the card tray at the critical moment based on the time-displacement correlation of the card tray during ejection, the time-displacement correlation of the ejector pin, and the stiffness of the ejector rod, includes:

[0076] The moment when Cato's acceleration is 0 is obtained based on the time-displacement correlation of the Cato, and the moment when Cato's acceleration is 0 is the critical moment when the Cato reaches the critical point.

[0077] Specifically, during Cato's motion, as the lateral deformation of the shrapnel increases, the net force gradually decreases. The net force is at its minimum when the shrapnel reaches its critical point, and Cato's acceleration is zero. The first derivative can be used to calculate Cato's velocity, the second derivative to calculate its acceleration, and the third derivative to calculate the extreme value of the acceleration. By analyzing the time-displacement relationship of Cato during ejection—that is, by taking the third derivative of Cato's time-displacement function—the moment when the acceleration is zero can be determined, as shown in Formula 7.

[0078] 7)

[0079] In some embodiments, after obtaining the time-displacement correlation relationship of the ejector during the ejector pop-up process and the time-displacement correlation relationship of the ejector pin based on the pop-up process video, the following steps are further included:

[0080] Based on the time-displacement correlation relationship of the ejector, obtain the deceleration moment when the ejector reaches the deceleration stage, and according to the time-displacement correlation relationship of the ejector during the deceleration process of the ejector, the mass of the ejector, and the mass of the smart card, obtain the frictional force received by the ejector at the deceleration moment.

[0081] Specifically, the frictional force of the ejector is the force that affects the ejector after passing through the critical moment and is an important indicator affecting the user experience of the ejector. The frictional force needs to be set within a preset range. If the frictional force is too small, the ejector will directly separate from the electronic device. After the ejector is no longer affected by the elastic force of the elastic piece, it is only affected by the frictional force. As shown in Figure 3 (e), at this time, the ejector performs a deceleration motion. That is, during the deceleration stage, the time-displacement function of the ejector's motion is differentiated three times to obtain the time period of the corresponding deceleration interval within the total video duration. The deceleration period is T = [T1, L]. Differentiating the time-displacement function of the ejector's motion twice can obtain the acceleration during the deceleration period. The calculation method is as shown in Formula 8:

[0082] 8)

[0083] Furthermore, using the weighing method, obtain the combined mass M of the ejector and the smart card. According to Newton's second law, the frictional force during the deceleration stage, F_friction, can be obtained. The calculation method of F_friction is as shown in Formula 9:

[0084] F_friction = 9)

[0085] In some embodiments, obtaining the deceleration moment when the ejector reaches the deceleration stage based on the time-displacement correlation relationship of the ejector and obtaining the frictional force received by the ejector at the deceleration moment according to the time-displacement correlation relationship of the ejector during the deceleration process of the ejector, the mass of the ejector, and the mass of the smart card includes:

[0086] Based on the time-displacement correlation relationship of the ejector, obtain the moment when the acceleration of the ejector is less than 0. The moment when the acceleration of the ejector is less than 0 is the deceleration moment when the ejector reaches the deceleration stage.

[0087] Specifically, during Cato's motion, as the amount of elastic force applied by Cato decreases, Cato gradually experiences only friction, causing it to decelerate; that is, Cato's acceleration becomes less than zero. The first derivative yields Cato's velocity, the second derivative yields its acceleration, and the third derivative yields the extreme value of the acceleration. By analyzing the time-displacement relationship of Cato during ejection—that is, by taking the third derivative of Cato's time-displacement function—the moment when the acceleration is less than zero can be determined.

[0088] In one embodiment, after obtaining the time-displacement correlation of the cartridge and the time-displacement correlation of the ejector pin during the ejection process based on the ejection process video, the method further includes:

[0089] Based on the critical moment and the deceleration moment, the acceleration phase moment after the card passes the critical point is obtained, and according to the time-displacement correlation of the card during the acceleration process, the mass of the card and the mass of the smart card, the ejection force of the spring on the card at the acceleration moment is obtained.

[0090] Specifically, after the cassette passes the critical point, it continues to be subjected to the combined force of the elastic force from the spring and the frictional force. At this time, the spring exerts an elastic force in the direction of the cassette's movement, which is an important indicator affecting the ejection speed in the cassette's design structure. Furthermore, the elastic force on the cassette at this point is greater than the frictional force, causing the cassette to accelerate. The acceleration phase after the cassette passes the critical point is obtained by combining the moments when the cassette reaches the critical point and when it decelerates. The ejection force during this acceleration phase is defined as [T0, T1].

[0091] Fexplosive = Fcombined + Fmolar. That is, Fexplosive is calculated as shown in Formula 10:

[0092] F-bullet == 10)

[0093] By differentiating Cato's time-displacement, we can obtain the acceleration during that time interval. Then, we can obtain F_net using Newton's second law. Since F_friction is known, we can obtain the ejection force F_elastic by subtracting F_friction from F_net.

[0094] In some embodiments, the acceleration phase time after the card tray passes the critical point is obtained based on the critical moment and the deceleration moment, and the ejection force of the spring on the card tray at the acceleration moment is obtained according to the time-displacement correlation of the card tray during the acceleration process, the mass of the card tray, and the mass of the smart card, including:

[0095] Based on the time-displacement correlation of the Cato, the acceleration at the moment of acceleration when the Cato passes through the critical point is greater than 0.

[0096] Specifically, such as Figure 3As shown in (d), after Cato passes the critical point, it continues to be subjected to the resultant force of the elastic force and friction of the spring. At this time, the spring applies an elastic force in the direction of Cato's movement, and the elastic force on Cato is greater than the friction force on Cato. At this time, Cato accelerates, that is, the acceleration of Cato is greater than 0.

[0097] In one specific implementation, the calculation methods for push-out force, frictional force, and ejection force are as follows: Figure 8 As shown.

[0098] In summary, the method for measuring the mechanical properties of the smart card mounting structure of the communication device provided in this application obtains the time-displacement correlation of the card tray and the ejector pin through video of the card tray ejection process, and calculates the ejection force of the ejector pin on the card tray based on the time-displacement relationship of the card tray and the ejector pin. This method can separate the parameters affecting the mechanical properties of the card tray, thereby achieving accurate verification of the main factors affecting the mechanical performance of the smart card mounting mechanism, eliminating significant experimental verification and production costs. It also solves the calculation error problem of the ejection force in the original technology.

[0099] It should be understood that, although Figure 1 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 1 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0100] In one embodiment, such as Figure 4 As shown, Figure 4 This is a structural block diagram of a smart card mounting structure mechanical property measurement system for a communication device according to one embodiment of this application. A smart card mounting structure mechanical property measurement system 200 for a communication device is provided, including: a video acquisition module 210, a relationship generation module 220, and a top output force calculation module 230.

[0101] The video acquisition module 210 is used to acquire the video of the ejection process during the ejection of the card tray;

[0102] The relationship generation module 220 is used to obtain the time-displacement relationship of the card tray and the time-displacement relationship of the ejector pin during the ejection process based on the ejection process video.

[0103] The ejection force calculation module 230 is used to obtain the critical moment when the card reaches the critical point based on the time-displacement correlation of the card, and to obtain the ejection force of the ejector pin on the card at the critical moment according to the time-displacement correlation of the card, the time-displacement correlation of the ejector pin and the stiffness of the ejector rod during the ejection process.

[0104] In one embodiment, the relationship generation module 220 further includes:

[0105] Read each frame and sampling time from the pop-up process video;

[0106] Identify the pixels of the cassette and the pixels of the ejector pin from each frame of the image;

[0107] Based on the sampling time of each frame of the image and the pixels of the cassette and the pin, the time-displacement relationship of the cassette and the time-displacement relationship of the pin are obtained respectively.

[0108] In summary, the smart card mounting structure mechanical property measurement system for communication equipment provided in this application obtains the time-displacement correlation of the card tray and the ejector pin through video of the card tray ejection process, and calculates the ejection force of the ejector pin on the card tray based on the time-displacement relationship of the card tray and the ejector pin. This allows for the separation of parameters affecting the mechanical properties of the card tray, thereby enabling precise verification of the main factors affecting the mechanical performance of the smart card mounting mechanism, eliminating significant experimental verification and production costs. Simultaneously, it solves the calculation error problem of the ejection force in existing technologies.

[0109] For specific limitations regarding the measurement system for the mechanical properties of a smart card mounting structure in a communication device, please refer to the limitations of the corresponding measurement method for the mechanical properties of a smart card mounting structure in a communication device mentioned above, which will not be repeated here. The various modules in the aforementioned application startup system of a mobile terminal can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware or independently of the processor in a computer device, or stored in software in the memory of a computer device, so that the processor can call and execute the operations corresponding to each module.

[0110] In one embodiment, a terminal device is provided, the internal structure of which can be shown as follows: Figure 5As shown, the terminal device includes a processor, memory, communication interface, display screen, and input device connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, carrier networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements an application opening method. The display screen can be an LCD screen or a communication e-ink display. The input device can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the terminal device's casing, or an external keyboard, touchpad, or mouse.

[0111] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the terminal device to which the present application is applied. Specific communication devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0112] In one embodiment, the smart card mounting structure mechanical property measurement system for a communication device provided in this application can be implemented as a computer program, which can be implemented in various ways, such as... Figure 5 The computer device shown is running on this system. The computer device's memory can store the various program modules that make up the smart card mounting structure mechanical property measurement system of this communication device, for example... Figure 4 The video acquisition module, relationship generation module, and top force calculation module are shown. The computer program, comprised of these modules, enables the processor to execute the steps of a method for measuring the mechanical properties of a smart card mounting structure of a communication device, as described in the various embodiments of this application.

[0113] For example, such as Figure 5 The mobile terminal shown can be accessed via, for example... Figure 4The illustrated smart card mounting structure mechanical property measurement system of a communication device includes a video acquisition module for acquiring video of the card tray ejection process. A relationship generation module is used to obtain the time-displacement relationship of the card tray and the ejector pin during the ejection process based on the video. An ejection force calculation module is used to obtain the critical moment when the card tray reaches the critical point based on the time-displacement relationship of the card tray, and to obtain the ejection force of the ejector pin on the card tray at the critical moment based on the time-displacement relationship of the card tray, the time-displacement relationship of the ejector pin, and the stiffness of the ejection rod.

[0114] In one embodiment, a terminal device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to perform the following steps: acquiring a video of the ejection process of the card tray; based on the video of the ejection process, obtaining the time-displacement relationship of the card tray and the time-displacement relationship of the ejector pin during the ejection process; obtaining the critical moment when the card tray reaches the critical point based on the time-displacement relationship of the card tray, and obtaining the ejection force of the ejector pin on the card tray at the critical moment according to the time-displacement relationship of the card tray, the time-displacement relationship of the ejector pin, and the stiffness of the ejector rod during the ejection process.

[0115] In one embodiment, obtaining the time-displacement relationship of the cartridge and the time-displacement relationship of the ejector pin during the ejection process based on the ejection process video includes:

[0116] Read each frame and sampling time from the pop-up process video;

[0117] Identify the pixels of the cassette and the pixels of the ejector pin from each frame of the image;

[0118] Based on the sampling time of each frame of the image and the pixels of the cassette and the pin, the time-displacement relationship of the cassette and the time-displacement relationship of the pin are obtained respectively.

[0119] In summary, the terminal device provided in this application obtains the time-displacement relationship of the card tray and the ejector pin through video of the card tray ejection process, and calculates the ejection force of the ejector pin on the card tray based on the time-displacement relationship of the card tray and the ejector pin. This method separates the parameters affecting the mechanical properties of the card tray, thereby achieving accurate verification of the main factors affecting the mechanical performance of the smart card installation mechanism, eliminating significant experimental verification and production costs. It also solves the calculation error problem of the ejection force in the original technology.

[0120] 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, it performs the following steps: acquiring a video of the ejection process of the card tray; based on the video of the ejection process, obtaining the time-displacement relationship of the card tray and the time-displacement relationship of the ejector pin during the ejection process; obtaining the critical moment when the card tray reaches the critical point based on the time-displacement relationship of the card tray, the time-displacement relationship of the ejector pin, and the stiffness of the ejector rod during the ejection process, and obtaining the ejection force of the ejector pin on the card tray at the critical moment, wherein the critical point refers to the position where the flange of the card tray is directly opposite the flange of the card holder spring.

[0121] In one embodiment, obtaining the time-displacement relationship of the cartridge and the time-displacement relationship of the ejector pin during the ejection process based on the ejection process video includes:

[0122] Read each frame and sampling time from the pop-up process video;

[0123] Identify the pixels of the cassette and the pixels of the ejector pin from each frame of the image;

[0124] Based on the sampling time of each frame of the image and the pixels of the cassette and the pin, the time-displacement relationship of the cassette and the time-displacement relationship of the pin are obtained respectively.

[0125] In summary, this application provides a non-transitory computer-readable storage medium that obtains the time-displacement relationship of the card tray and the ejector pin through video of the card tray ejection process. Based on the time-displacement relationship of the card tray and the ejector pin, the ejection force of the ejector pin on the card tray is calculated. This method can separate the parameters affecting the mechanical properties of the card tray, thereby achieving accurate verification of the main factors affecting the mechanical performance of the smart card installation mechanism, eliminating a large amount of experimental verification and production costs. It also solves the calculation error problem of the ejection force in the original technology.

[0126] In one embodiment, a computer program product is provided. When the instructions in the computer program product are executed by the processor of a terminal device, the terminal device is enabled to perform the following steps: acquiring a video of the ejection process of the card tray; based on the video of the ejection process, obtaining the time-displacement relationship of the card tray and the time-displacement relationship of the ejector pin during the ejection process; obtaining the critical moment when the card tray reaches the critical point based on the time-displacement relationship of the card tray, and obtaining the ejection force of the ejector pin on the card tray at the critical moment according to the time-displacement relationship of the card tray, the time-displacement relationship of the ejector pin, and the stiffness of the ejector rod during the ejection process, wherein the critical point refers to the position where the flange of the card tray is directly opposite the flange of the card holder spring.

[0127] In one embodiment, obtaining the time-displacement relationship of the cartridge and the time-displacement relationship of the ejector pin during the ejection process based on the ejection process video includes:

[0128] Read each frame and sampling time from the pop-up process video;

[0129] Identify the pixels of the cassette and the pixels of the ejector pin from each frame of the image;

[0130] Based on the sampling time of each frame of the image and the pixels of the cassette and the pin, the time-displacement relationship of the cassette and the time-displacement relationship of the pin are obtained respectively.

[0131] In summary, by analyzing the video of the card ejector ejection process, the time-displacement relationship of the card ejector and the ejector pin are obtained. Based on the time-displacement relationship of the card ejector and the ejector pin, the ejection force of the ejector pin on the card ejector is calculated. This method can separate the parameters affecting the mechanical properties of the card ejector, thereby achieving accurate verification of the main factors affecting the mechanical performance of the smart card installation mechanism, eliminating significant experimental verification and production costs. It also solves the calculation error problem of the ejection force in the original technology.

[0132] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can 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 storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static random access memory (SRAM) and dynamic random access memory (DRAM), etc.

[0133] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0134] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for measuring the mechanical properties of a smart card mounting structure in a communication device, characterized in that, The smart card mounting structure includes a card tray, a card socket, a card socket spring, a PCB board, and a housing. The method for measuring the mechanical properties of the smart card mounting structure of the communication device includes: Obtain the video of the ejection process of the cassette; Based on the video of the ejection process, the time-displacement relationship of the card tray K_T=f(T) and the time-displacement relationship of the ejector pin D_T=g(T) are obtained during the ejection process. Based on the time-displacement relationship K_T = f(T) of the ejector, the critical moment when the ejector reaches the critical point during the ejection process is obtained. Then, based on the time-displacement relationship K_T = f(T) of the ejector during ejection, the time-displacement relationship D_T = g(T) of the ejector pin, and the stiffness k of the ejection rod, the ejection force of the ejector pin at the critical moment is obtained as F1(T) = (K_T - D_T) * k. The critical point refers to the position where the flange of the card tray is directly opposite the flange of the card holder spring. The moment when the acceleration of the card tray is 0 is obtained based on the time-displacement correlation K_T=f(T) of the card tray. The moment when the acceleration of the card tray is 0 is the critical moment when the card tray reaches the critical point.

2. The method according to claim 1, characterized in that, The process of obtaining the time-displacement relationship of the cartridge and the time-displacement relationship of the ejector pin during the ejection process based on the ejection process video includes: Read each frame and sampling time from the pop-up process video; Identify the pixels of the cassette and the pixels of the ejector pin from each frame of the image; Based on the sampling time of each frame image and the pixels of the cassette and the pin, the time-displacement relationship of the cassette and the time-displacement relationship of the pin are obtained respectively.

3. The method according to claim 1 or 2, characterized in that, After obtaining the time-displacement relationship of the cartridge and the time-displacement relationship of the ejector pin during the ejection process based on the ejection process video, the process further includes: Based on the time-displacement correlation of the cardholder, the deceleration time at which the cardholder reaches the deceleration phase is obtained. Then, based on the time-displacement correlation of the cardholder during deceleration, the mass of the cardholder, and the mass of the smart card, the frictional force experienced by the cardholder at the deceleration time is calculated as F_friction = f″(T)*M, where T = [T1, L], where T = [T1, L] represents the deceleration period, and M is the combined mass of the cardholder and the smart card. .

4. The method according to claim 3, characterized in that, Based on the time-displacement correlation of the card holder, the deceleration time at which the card holder reaches the deceleration phase is obtained. Furthermore, based on the time-displacement correlation of the card holder during deceleration, the mass of the card holder, and the mass of the smart card, the frictional force experienced by the card holder at the deceleration time is obtained, including: Based on the time-displacement correlation of the Cato, the moment when the Cato acceleration is less than 0 is obtained, and the moment when the Cato acceleration is less than 0 is the deceleration moment when the Cato reaches the deceleration phase.

5. The method according to claim 3, characterized in that, After obtaining the time-displacement relationship of the cartridge and the time-displacement relationship of the ejector pin during the ejection process based on the ejection process video, the process further includes: Based on the critical moment and the deceleration moment, the acceleration phase moment after the card passes the critical point is obtained. Then, based on the time-displacement relationship of the card during acceleration, the card's mass, and the smart card's mass, the ejection force of the spring on the card at the acceleration moment is calculated. F_bullet = (f″(T1) + f″(T)) * M, where [T0, T1] are the acceleration phase times, and M is the combined mass of the card and the smart card.

6. The method according to claim 5, characterized in that, Based on the critical moment and the deceleration moment, the acceleration phase moment after the card passes the critical point is obtained. Then, based on the time-displacement correlation of the card during acceleration, the card's mass, and the smart card's mass, the ejection force of the spring on the card at the acceleration moment is obtained, including: Based on the time-displacement correlation of the Cato, the acceleration at the moment of acceleration when the Cato passes through the critical point is greater than 0.

7. A system for measuring the mechanical properties of a smart card mounting structure in a communication device, characterized in that, include: The video acquisition module acquires the video of the ejection process during the ejection of the card tray; The relationship generation module, based on the pop-out process video, obtains the time-displacement relationship K_T=f(T) of the card tray during the pop-out process, and the time-displacement relationship D_T=g(T) of the ejector pin; The ejection force calculation module obtains the critical moment when the card tray reaches the critical point based on the time-displacement correlation K_T = f(T) of the card tray, and obtains the ejection force of the ejector pin on the card tray at the critical moment based on the time-displacement correlation K_T = f(T) of the card tray during ejection, the time-displacement correlation D_T = g(T) of the ejector pin, and the stiffness k of the ejection rod, F1(T) = (K_T - D_T) * k. The critical point refers to the position where the flange of the card tray is directly opposite the flange of the card holder spring. The moment when the acceleration of the card tray is 0 is obtained based on the time-displacement relationship K_T=f(T) of the card tray. The moment when the acceleration of the card tray is 0 is the critical moment when the card tray reaches the critical point.

8. A terminal device, characterized in that, The device includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set, or an instruction set, and the instruction, program, code set, or instruction set is loaded and executed by the processor to implement the method for measuring the mechanical properties of the smart card mounting structure of the communication device as described in any one of claims 1-6.

9. A computer program product, characterized in that, When the instructions in the computer program product are executed by the processor of the terminal device, the terminal device is able to perform the method for measuring the mechanical properties of the smart card mounting structure of the communication device as described in any one of claims 1-6.

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