Key hand feeling detection device and key hand feeling detection method

Abstract

The invention provides a key hand feeling detection device and a key hand feeling detection method. The device comprises a capacitive sensing contact configured to perform a pressing operation in a predetermined mode on a key of a to-be-detected object under the action of an external driving force; the force sensor is used for collecting related data of a reaction force borne by the capacitive sensing contact in the pressing operation process of the capacitive sensing contact; the data processing unit is configured to obtain the capacitance value variation when the capacitance induction contact is in contact with the key, and determine the surface texture distribution uniformity of the key according to the capacitance value variation; determining the pressing force, the resilience force and the damping coefficient of the key according to the counter-acting force related data, and judging whether the key passes the hand feeling detection according to the surface texture distribution uniformity, the pressing force, the resilience force and the damping coefficient of the key; and according to the resilience force of each key of the to-be-detected object, determining the key resilience consistency of the to-be-detected object, and if the key resilience consistency accords with a predetermined standard, determining that the to-be-detected object passes the key hand feeling detection. According to the invention, high-dimensional hand feeling detection can be carried out on the product key, so that the product use experience of a user is improved.

Description

Technical Field

[0001] This invention belongs to the field of button tactile detection, and more specifically, relates to a button tactile detection device and a button tactile detection method. Background Technology

[0002] In recent years, although more and more handheld terminal devices have been developing towards larger screens and touchscreen designs, they still inevitably need to use some physical buttons. For these handheld terminal devices, in order to ensure a good user experience, the tactile feedback of the physical buttons needs to be tested before they leave the factory.

[0003] Existing button tactile detection typically relies on automated button tactile detection devices. A typical existing device includes a driving unit, a stylus, and a data processing unit, where the stylus is equipped with a touch head and a force sensor. The working principle of this device is as follows: the driving unit applies a driving force to the stylus; the stylus moves towards the button on the product under test under the driving force and presses the button through the touch head; the force sensor collects data on the reaction force received by the touch head during the pressing operation; the data processing unit determines the pressing force and rebound force of the button based on the collected reaction force data, and determines whether the button passes the tactile detection based on the pressing force and rebound force. If all buttons on the product under test pass the tactile detection, the product is deemed to have passed the button tactile detection.

[0004] However, the applicant found that the key feel detection method based on the above-mentioned key feel detection device still has the following main problems:

[0005] First, for the tactile testing of a single button, only the mechanical properties of the button are considered, that is, the button's tactile feel is judged based on the pressing force and rebound force of the button. However, the tactile feedback of the button is not considered, which is an important indicator of the quality of the button's tactile feel.

[0006] Second, regarding button feel testing at the product level, the current method is to determine that a product passes the button feel test if all buttons in the product pass the feel test. However, due to unavoidable production tolerances during the manufacturing process, although all buttons in a product may pass the feel test, the consistency of feel among the buttons may be poor, with the most prominent issue being the poor consistency of rebound among the buttons. Summary of the Invention

[0007] In view of this, the present invention provides a button tactile feedback detection device and a button tactile feedback detection method.

[0008] According to a first aspect of the present invention, a button tactile feedback detection device is provided, the button tactile feedback detection device comprising a data acquisition unit and a data processing unit;

[0009] The data acquisition unit includes:

[0010] The capacitive sensing contact is configured to perform a predetermined pattern of pressing operation on the button of the object to be measured under the action of an external driving force;

[0011] A force sensor is used to collect data related to the reaction force received by the capacitive sensing contact during the pressing operation of the capacitive sensing contact.

[0012] The data processing unit is configured as follows:

[0013] The change in capacitance value when the capacitive sensing contact comes into contact with the button is obtained, and the uniformity of the surface texture distribution of the button is determined based on the change in capacitance value.

[0014] The pressing force, rebound force, and damping coefficient of the button are determined based on the reaction force data.

[0015] Based on the uniformity of the surface texture distribution, pressing force, rebound force, and damping coefficient of the button, it is determined whether the button passes the tactile test.

[0016] And determine the button rebound consistency of the test object based on the rebound force of each button of the test object. If the button rebound consistency meets the predetermined standard, then determine that the test object passes the button feel test.

[0017] Optionally, the data acquisition unit may also include a contact guide mechanism, a force transmission assembly, and a sensor mounting frame;

[0018] The contact guide mechanism includes a housing and a guide bearing built into the housing;

[0019] The force transmission assembly includes a smooth bolt, an extended guide rod, a convex ring structure, and a spring;

[0020] The sensor mounting frame includes a support frame and a mounting cover formed on the support frame. The support frame is fixedly disposed on the first end face of the housing, and the force sensor is mounted in the mounting cover.

[0021] The capacitive sensing contact is disposed on the first end of the extended guide rod, and the second end of the extended guide rod extends into the guide bearing after passing through the second end face of the housing. The first end face and the second end face are disposed opposite to each other.

[0022] The first end of the optical bolt is coaxially threaded to the second end of the extended guide rod after passing through the hollow region of the force sensor and the first end face of the housing in sequence. The second end of the optical bolt is configured to always be exposed outside the force sensor.

[0023] The convex ring structure is fixedly sleeved on the optical bolt and sits on the first end face of the housing;

[0024] The spring is sleeved on the optical rod bolt and abuts against the convex ring structure and the sensing area of ​​the force sensor, respectively.

[0025] Optionally, the capacitive sensing contact is threaded to the first end of the extended guide rod.

[0026] Optionally, the capacitive sensing contact includes a capacitive sensing contact body and a threaded post disposed on the rear end of the capacitive sensing contact body.

[0027] An internal thread matching the threaded post is formed on the first end of the extended guide rod;

[0028] The data acquisition unit also includes a set screw locking mechanism, which is used to fix the threaded post and the sidewall of the first end of the extended guide rod in the radial direction.

[0029] Alternatively, the convex ring structure can be implemented using a clamping ring.

[0030] Optionally, the data acquisition unit may also include a gasket;

[0031] The gasket is fitted onto the guide rod bolt and abuts against the sensing areas of the spring and the force sensor, respectively.

[0032] Optionally, the button feel detection device further includes an image acquisition unit for acquiring images of capacitive sensing contacts;

[0033] The data processing unit is also used to determine the wear degree of the capacitive sensing contact based on the image of the capacitive sensing contact, and to send a contact replacement prompt message when the wear degree of the capacitive sensing contact reaches a predetermined wear degree threshold.

[0034] According to a second aspect of the present invention, a method for detecting key feel based on any of the above-described key feel detection devices is provided, the key feel detection method comprising the following steps:

[0035] The capacitive sensing contact is driven to perform a predetermined pattern of pressing operation on the button of the object under test;

[0036] During the pressing operation of the capacitive sensing contact, the force sensor collects data related to the reaction force received by the capacitive sensing contact.

[0037] The following operations are performed through the data processing unit:

[0038] The change in capacitance value when the capacitive sensing contact comes into contact with the button is obtained, and the uniformity of the surface texture distribution of the button is determined based on the change in capacitance value.

[0039] The pressing force, rebound force, and damping coefficient of the button are determined based on the reaction force data.

[0040] Based on the uniformity of the surface texture distribution, pressing force, rebound force, and damping coefficient of the button, it is determined whether the button passes the tactile test.

[0041] And determine the button rebound consistency of the test object based on the rebound force of each button of the test object. If the button rebound consistency meets the predetermined standard, then determine that the test object passes the button feel test.

[0042] Optionally, the step of the driving capacitive sensing contact performing a press operation on the button of the object to be tested in a predetermined pattern further includes:

[0043] The pressing operation process is divided into a continuous first stage, a second stage, and a third stage. The moving speed of the capacitive sensing contact in the second stage is greater than that in the first stage, and the moving speed of the capacitive sensing contact in the first stage is greater than that in the third stage.

[0044] Optionally, the button feel detection method further includes the following steps:

[0045] A temperature compensation operation is performed on the force-controlled motor used to drive the capacitive sensing contact, the temperature compensation operation including:

[0046] Establish a temperature-force drift compensation table;

[0047] The real-time temperature is obtained, and the driving force compensation value of the force-controlled motor is determined according to the temperature-force drift compensation table.

[0048] The driving parameters of the force-controlled motor are corrected based on the driving force compensation value.

[0049] The beneficial effects of this invention are as follows:

[0050] The button tactile detection device of the present invention includes a data acquisition unit and a data processing unit. The data acquisition unit includes a capacitive sensing contact and a force sensor. The capacitive sensing contact is configured to perform a predetermined pressing operation on a button of the test object under the action of an external driving force. The force sensor is used to acquire data related to the reaction force received by the capacitive sensing contact during the pressing operation. The data processing unit is used to: acquire the change in capacitance value when the capacitive sensing contact contacts the button, and determine the uniformity of the surface texture distribution of the button based on the change in capacitance value; determine the pressing force, rebound force, and damping coefficient of the button based on the reaction force data; determine whether the button passes the tactile detection based on the uniformity of the surface texture distribution, pressing force, rebound force, and damping coefficient; and determine the button rebound consistency of the test object based on the rebound force of each button. If the button rebound consistency meets a predetermined standard, the test object is determined to have passed the button tactile detection.

[0051] The button feel detection device of the present invention, in its first aspect, considers not only the mechanical properties of the button but also its tactile feedback factors, including the uniformity of the surface texture distribution and the damping coefficient, for the feel detection of a single button. Therefore, compared to existing button feel detection methods, the present invention achieves more comprehensive button feel detection based on multi-dimensional feel evaluation indicators, significantly improving the user experience. In its second aspect, for button feel detection at the product level, after all buttons on the test object have passed the feel detection, the present invention continues to detect the consistency of the rebound of each button. This setting effectively solves the problem that although all buttons on a product can pass the feel detection, the inconsistent button feel due to low rebound consistency among the buttons can effectively solve the problem.

[0052] The button feel detection method of the present invention and the button feel detection device described above belong to the same general inventive concept and have at least the same beneficial effects as the button feel detection device described above, and the beneficial effects will not be repeated here.

[0053] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0054] The present invention can be better understood by referring to the following description taken in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the drawings to denote the same or similar parts.

[0055] Figure 1 A schematic diagram of the data acquisition unit from a first perspective according to an embodiment of the present invention is shown;

[0056] Figure 2A schematic diagram of the data acquisition unit from a second perspective according to an embodiment of the present invention is shown;

[0057] Figure 3 A schematic diagram of the structure of a data acquisition unit without the housing of the contact guide mechanism installed according to an embodiment of the present invention is shown;

[0058] Figure 4 A schematic diagram illustrating the principle of adjusting the extension length of the capacitive sensing contact according to an embodiment of the present invention is shown;

[0059] Figure 5 A flowchart illustrating the implementation of a button tactile feedback detection method according to an embodiment of the present invention is shown. Detailed Implementation

[0060] To enable those skilled in the art to more fully understand the technical solutions of the present invention, exemplary embodiments of the present invention will be described more comprehensively and in detail below with reference to the accompanying drawings. Obviously, the one or more embodiments of the present invention described below are merely one or more specific ways to implement the technical solutions of the present invention, and are not exhaustive. It should be understood that other ways belonging to a general inventive concept can be used to implement the technical solutions of the present invention, and should not be limited to the embodiments described exemplary. Based on one or more embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0061] Example: Figure 1 This diagram illustrates the structure of a data acquisition unit from a first-view perspective according to an embodiment of the present invention. Figure 2 This diagram illustrates the structure of the data acquisition unit from a second perspective according to an embodiment of the present invention. Figure 3 A schematic diagram of the data acquisition unit without the housing of the contact guide mechanism is shown.

[0062] Reference Figures 1 to 3 The button feel detection device of this invention includes a data acquisition unit and a data processing unit;

[0063] The data acquisition unit includes:

[0064] The capacitive sensing contact 10 is configured to perform a predetermined pressing operation on the button of the object to be measured under the action of an external driving force;

[0065] Force sensor 20 is used to collect data related to the reaction force of capacitive sensing contact 10 during the pressing operation of capacitive sensing contact 10.

[0066] The data processing unit is configured as follows:

[0067] The change in capacitance value when the capacitive sensing contact 10 comes into contact with the button is obtained, and the uniformity of the surface texture distribution of the button is determined based on this change in capacitance value.

[0068] The pressing force, rebound force, and damping coefficient of the button are determined based on the reaction force data collected by the force sensor 20.

[0069] The tactile feedback of a button is determined by factors such as the uniformity of its surface texture, the pressure applied, the rebound force, and the damping coefficient.

[0070] The button rebound consistency of the test object is determined based on the rebound force of each button. If the button rebound consistency meets the predetermined standard, the test object is determined to have passed the button feel test.

[0071] Specifically, in this embodiment of the invention, the entire process of button feel detection includes a single button feel detection stage and a product-level button feel detection stage:

[0072] In the tactile testing of a single button, the button's pass / fail status is determined based on the uniformity of its surface texture distribution, pressing force, rebound force, and damping coefficient. If these parameters are within their respective standard ranges, the button is considered to have passed the tactile test. Pressing force and rebound force are mechanical properties of the button, and current button tactile testing methods typically only consider these two parameters. The damping coefficient and surface texture distribution uniformity relate to the button's tactile feedback. The damping coefficient is a key parameter for measuring tactile feedback, determining the resistance changes during button pressing, while the surface texture distribution uniformity characterizes the user's direct contact with the button.

[0073] In this embodiment of the invention, the surface texture distribution uniformity of the button is indirectly determined by the change in capacitance value when the capacitive sensing contact 10 comes into contact with the button. The principle is as follows: when the capacitive sensing contact 10 comes into contact with the physical button, the capacitance value of the capacitive sensing contact 10 will change, and this change in capacitance value can reflect the surface condition of the physical button (surface texture distribution uniformity), and thus reflect the feel of the button. The capacitive sensing contact 10 will produce different capacitance changes when it comes into contact with surfaces with different texture distribution uniformities. The surface texture distribution uniformity directly affects the contact area, electric field distribution and parasitic capacitance effect.

[0074] If all buttons on the test object pass the tactile feedback test, the product-level button tactile feedback test begins. In this stage, the rebound consistency of each button is determined based on its rebound force. If the button rebound consistency meets a predetermined standard, the test object is deemed to have passed the button tactile feedback test. If any button on the test object fails the preceding tactile feedback test, the button rebound consistency test is unnecessary, and the test object is directly deemed to have failed the button tactile feedback test.

[0075] Specifically, the button feel detection device of this embodiment of the invention can detect the button feel of any device that needs to perform button feel detection on the front and / or side buttons of a product during the production process, such as network communication mobile phones, financial payment POS machines, retail business POS machines, data acquisition equipment in the logistics and retail field, and industrial control equipment. The button feel detection device of this embodiment of the invention is applicable not only to button feel detection of handheld terminal devices but also to button feel detection of non-handheld terminal devices. Meanwhile, the capacitive sensing contact 10 can sense the capacitive screen and perform line detection and screen button detection on the capacitive screen.

[0076] Furthermore, in this embodiment of the invention, the data acquisition unit also includes a contact guide mechanism, a force transmission component, and a sensor mounting frame;

[0077] The contact guiding mechanism includes a housing 30 and a guide bearing 40 built into the housing 30;

[0078] The force transmission assembly includes a smooth bolt 50, an extended guide rod 60, a convex ring structure 70, and a spring 80;

[0079] The sensor mounting frame includes a support frame 90 and a mounting cover 1000 formed on the support frame 90. The support frame 90 is fixedly disposed on the first end face of the housing 30, and the force sensor 20 is mounted in the mounting cover 1000.

[0080] The capacitive sensing contact 10 is disposed on the first end of the extended guide rod 60, and the second end of the extended guide rod 60 extends into the guide bearing 40 after passing through the second end face of the housing 30. The first end face and the second end face of the housing 30 are disposed opposite to each other.

[0081] After passing through the hollow region of the force sensor 20 and the first end face of the housing 30 in sequence, the first end of the smooth rod bolt 50 is coaxially threaded to the second end of the extended guide rod 60. The second end of the smooth rod bolt 50 is configured to always be exposed outside the force sensor 20.

[0082] The convex ring structure 70 is fixedly sleeved on the smooth rod bolt 50 and sits on the first end face of the housing 30;

[0083] Spring 80 is sleeved on smooth rod bolt 50 and abuts against the sensing area of ​​convex ring structure 70 and force sensor 20 respectively.

[0084] Furthermore, in this embodiment of the invention, the capacitive sensing contact 10 is threadedly connected to the first end of the extended guide rod 60.

[0085] Specifically, in this embodiment of the invention, the capacitive sensing contact 10 includes a capacitive sensing contact body and a threaded post disposed on the rear end of the capacitive sensing contact body.

[0086] An internal thread matching the threaded post is formed on the first end of the extended guide rod 60;

[0087] The data acquisition unit also includes a set screw locking mechanism 1100, which is used to fix the threaded post and the side wall of the first end of the extended guide rod 60 in the radial direction.

[0088] In this embodiment of the invention, the capacitive sensing contact 10 needs to contact and rub against the button during the pressing process, therefore, the capacitive sensing contact 10 is a wear-prone component. Typically, the capacitive sensing contact 10 needs to be replaced after a certain number of button feel tests are completed. Therefore, the capacitive sensing contact 10 adopts a threaded connection quick-change structure design.

[0089] Furthermore, in this embodiment of the invention, the convex ring structure 70 is implemented using a clamping ring.

[0090] Furthermore, in this embodiment of the invention, the data acquisition unit further includes a gasket 1200;

[0091] The gasket 1200 is fitted onto the smooth rod bolt 50 and abuts against the sensing areas of the spring 80 and the force sensor 20, respectively.

[0092] Specifically, refer to Figure 3 The force transmission process of the button feel detection device in this embodiment of the invention is as follows: the reaction force applied by the button to the capacitive sensing contact 10 is transmitted to the light rod bolt 50 through the extended guide rod 60; since the convex ring structure 70 is fixedly sleeved on the light rod bolt 50, the reaction force transmitted to the light rod bolt 50 is transmitted to the spring 80 through the convex ring structure 70, and the reaction force transmitted to the spring 80 is transmitted to the force sensor 20 through the gasket 1200.

[0093] Specifically, in this embodiment of the invention, the main function of the contact guiding mechanism is to ensure that the capacitive sensing contact 10 maintains high precision during unidirectional movement, to share and remove lateral forces, and to transmit axial forces to the spring 80. The guide bearing 40 is implemented using a graphite copper bushing, which has the advantages of high fitting precision and maintenance-free operation.

[0094] Specifically, Figure 4 A schematic diagram illustrating the principle of adjusting the extension length of the capacitive sensing contact according to an embodiment of the present invention is shown. (Refer to...) Figure 4 In this embodiment of the invention, by adjusting the position of the convex ring structure 70 on the smooth rod bolt 50, the extension length of the capacitive sensing contact can be finely adjusted. The specific principle is as follows: the convex ring structure 70, which is fixed to the smooth rod bolt 50, sits on the top plate 31 of the housing 30 under the action of gravity; when the position of the convex ring structure 70 is adjusted upward, the combination formed by the convex ring structure 70, the smooth rod bolt 50 and the extended guide rod 60 will fall as a whole, and the extension length of the capacitive sensing contact 10 will become longer; when the position of the convex ring structure 70 is adjusted downward, the combination formed by the convex ring structure 70, the smooth rod bolt 50 and the extended guide rod 60 will rise as a whole, and the extension length of the capacitive sensing contact 10 will become shorter.

[0095] Furthermore, the button feel detection device of this embodiment of the invention also includes an image acquisition unit for acquiring images of capacitive sensing contacts;

[0096] The data processing unit is also used to determine the wear degree of the capacitive sensing contact 10 based on the capacitive sensing contact image, and to send a contact replacement prompt message when the wear degree of the capacitive sensing contact 10 reaches a predetermined wear degree threshold.

[0097] Accordingly, based on the button feel detection device of the present invention, the present invention also proposes a button feel detection method based on the button feel detection device.

[0098] Figure 5 A flowchart illustrating the implementation of the button tactile feedback detection method according to an embodiment of the present invention is shown. (Refer to...) Figure 5 The button feel detection method of this invention includes the following steps:

[0099] Step S100: Drive the capacitive sensing contact to perform a press operation on the button of the object under test in a predetermined pattern;

[0100] Step S200: During the pressing operation of the capacitive sensing contact, the force sensor collects relevant data on the reaction force received by the capacitive sensing contact.

[0101] Step S300: The following operations are performed by the data processing unit:

[0102] The change in capacitance value when the capacitive sensing contact comes into contact with the button is obtained, and the uniformity of the surface texture distribution of the button is determined based on the change in capacitance value.

[0103] The pressing force, rebound force, and damping coefficient of the button are determined based on the reaction force data. Based on the uniformity of the surface texture distribution, pressing force, rebound force, and damping coefficient of the button, it is determined whether the button passes the tactile test.

[0104] The button rebound consistency of the test object is determined by the rebound force of each button. If the button rebound consistency meets the predetermined standard, the test object is deemed to have passed the button feel test.

[0105] Furthermore, in this embodiment of the invention, step S100, in which the driving capacitive sensing contact performs a predetermined pattern pressing operation on the button of the object to be tested, further includes:

[0106] The pressing operation process is divided into three consecutive stages: the first stage, the second stage, and the third stage. The capacitive sensing contact moving speed in the second stage is greater than that in the first stage, and the capacitive sensing contact moving speed in the first stage is greater than that in the third stage.

[0107] Specifically, in this embodiment of the invention, the pressing operation of the capacitive sensing contact simulates the pressing action of a human finger. The pressing operation adopts a three-stage "slow-fast-slow" operation to ensure data stability. For example, the moving speed of the capacitive sensing contact in the first stage is 0.5 mm / s, the moving speed of the capacitive sensing contact in the second stage is 2 mm / s, and the moving speed of the capacitive sensing contact in the third stage is 0.3 mm / s.

[0108] Furthermore, the button feel detection method of this embodiment of the invention also includes the following steps:

[0109] A temperature compensation operation is performed on the force-controlled motor used to drive the capacitive sensing contact. This temperature compensation operation includes:

[0110] Establish a temperature-force drift compensation table;

[0111] The real-time temperature is obtained, and the driving force compensation value of the force-controlled motor is determined according to the temperature-force drift compensation table;

[0112] The drive parameters of the force-controlled motor are corrected based on the drive force compensation value.

[0113] Specifically, in this embodiment of the invention, the data acquisition unit is mounted on the end effector of a three-axis motion mechanism. The three-axis motion mechanism has an X-axis motor, a Y-axis motor, and a Z-axis force control motor. The X-axis and Y-axis motors can adjust the position of the end effector in the corresponding XY plane, thereby adjusting the position of the capacitive sensing contact in the corresponding XY plane. The Z-axis force control motor is used to drive the end effector to move in the Z-axis direction, thereby driving the capacitive sensing contact to perform a predetermined pattern of pressing operation on the button of the object under test.

[0114] The button feel detection method of this invention will be described in more detail below based on a specific example:

[0115] 1) When the capacitive sensing contact moves to the predetermined initial position, the Z-axis force control motor drives the capacitive sensing contact to move toward the target button according to the predetermined driving parameters, so as to realize the pressing operation of the target button.

[0116] 2) The data processing unit acquires the capacitance change of the capacitive sensing contact, the six-dimensional force data collected by the force sensor, and the pressing stroke-time curve of the Z-axis force control motor; among them, the data processing unit synchronizes the six-dimensional force data (sampling rate 1000Hz) and capacitance change (sampling rate 500Hz) with a hardware clock to avoid the impact of timestamp deviation on subsequent analysis.

[0117] 3) The acquired data is preprocessed, including filtering and noise reduction. The data processing unit then analyzes the tactile features based on the preprocessed feature data and a pre-trained AI model to obtain the surface texture distribution uniformity, pressing force, rebound force, and damping coefficient of the target button, thereby determining whether the target button passes the tactile test. After all buttons on the target product pass the tactile test, the data processing unit continues to use the AI ​​model to analyze the rebound consistency of each button, thereby determining whether the target product passes the button tactile test. It should be noted that the calculation of the pressing force, rebound force, and damping coefficient of the button is existing technology. This embodiment of the invention uses conventional methods for calculating these parameters, which will not be elaborated here. Regarding the calculation of the surface texture distribution uniformity, this embodiment of the invention pre-obtains the mapping relationship between the capacitance value change and the surface texture distribution uniformity corresponding to different button models. The AI ​​model determines the surface texture distribution uniformity of the button based on this mapping relationship.

[0118] 4) Implement a temperature compensation strategy for force-controlled motors:

[0119] Establish a temperature-force drift compensation table (e.g., 25℃ as the baseline, with a force deviation of 0.3% for every ±1℃) and automatically correct it in the "Force Control Motor Parameter Configuration" step.

[0120] 5) Adopt a wear self-diagnosis and compensation strategy:

[0121] The deformation of the capacitive sensor contact is visually measured, and an automatic replacement reminder is triggered when it exceeds 0.1mm.

[0122] If the capacitive sensing contact is worn and not replaced, the system will automatically adjust the downward stroke (e.g., if the wear is 0.1mm, the downward stroke will be increased by 0.15mm).

[0123] While one or more embodiments of the present invention have been described above, those skilled in the art will recognize that the present invention can be implemented in any other form without departing from its spirit and scope. Therefore, the embodiments described above are illustrative and not restrictive, and many modifications and substitutions will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A button tactile feedback detection device, characterized in that, Includes a data acquisition unit and a data processing unit; The data acquisition unit includes: The capacitive sensing contact is configured to perform a predetermined pattern of pressing operation on the button of the object to be measured under the action of an external driving force; A force sensor is used to collect data related to the reaction force received by the capacitive sensing contact during the pressing operation of the capacitive sensing contact. The data processing unit is configured as follows: The change in capacitance value when the capacitive sensing contact comes into contact with the button is obtained, and the uniformity of the surface texture distribution of the button is determined based on the change in capacitance value. The pressing force, rebound force, and damping coefficient of the button are determined based on the reaction force data. Based on the uniformity of the surface texture distribution, pressing force, rebound force, and damping coefficient of the button, it is determined whether the button passes the tactile test. And determine the button rebound consistency of the test object based on the rebound force of each button of the test object. If the button rebound consistency meets the predetermined standard, then determine that the test object passes the button feel test.

2. The button feel detection device according to claim 1, characterized in that, The data acquisition unit also includes a contact guide mechanism, a force transmission component, and a sensor mounting frame; The contact guide mechanism includes a housing and a guide bearing built into the housing; The force transmission assembly includes a smooth bolt, an extended guide rod, a convex ring structure, and a spring; The sensor mounting frame includes a support frame and a mounting cover formed on the support frame. The support frame is fixedly disposed on the first end face of the housing, and the force sensor is mounted in the mounting cover. The capacitive sensing contact is disposed on the first end of the extended guide rod, and the second end of the extended guide rod extends into the guide bearing after passing through the second end face of the housing. The first end face and the second end face are disposed opposite to each other. The first end of the optical bolt is coaxially threaded to the second end of the extended guide rod after passing through the hollow region of the force sensor and the first end face of the housing in sequence. The second end of the optical bolt is configured to always be exposed outside the force sensor. The convex ring structure is fixedly sleeved on the optical bolt and sits on the first end face of the housing; The spring is sleeved on the optical rod bolt and abuts against the convex ring structure and the sensing area of ​​the force sensor, respectively.

3. The button feel detection device according to claim 2, characterized in that, The capacitive sensing contact is threadedly connected to the first end of the extended guide rod.

4. The button feel detection device according to claim 3, characterized in that, The capacitive sensing contact includes a capacitive sensing contact body and a threaded post disposed on the rear end of the capacitive sensing contact body. An internal thread matching the threaded post is formed on the first end of the extended guide rod; The data acquisition unit also includes a set screw locking mechanism, which is used to fix the threaded post and the sidewall of the first end of the extended guide rod in the radial direction.

5. The button feel detection device according to claim 2, characterized in that, The convex ring structure is achieved using a clamping ring.

6. The button feel detection device according to claim 2, characterized in that, The data acquisition unit also includes a gasket; The gasket is fitted onto the guide rod bolt and abuts against the sensing areas of the spring and the force sensor, respectively.

7. The button feel detection device according to claim 1, characterized in that, It also includes an image acquisition unit for acquiring images of the capacitive sensing contact; The data processing unit is also used to determine the wear degree of the capacitive sensing contact based on the image of the capacitive sensing contact, and to send a contact replacement prompt message when the wear degree of the capacitive sensing contact reaches a predetermined wear degree threshold.

8. A method for detecting button tactile feedback, characterized in that, Based on the button feel detection device according to any one of claims 1-7; The button tactile feedback detection method includes: The capacitive sensing contact is driven to perform a predetermined pattern of pressing operation on the button of the object under test; During the pressing operation of the capacitive sensing contact, the force sensor collects data related to the reaction force received by the capacitive sensing contact. The following operations are performed through the data processing unit: The change in capacitance value when the capacitive sensing contact comes into contact with the button is obtained, and the uniformity of the surface texture distribution of the button is determined based on the change in capacitance value. The pressing force, rebound force, and damping coefficient of the button are determined based on the reaction force data. Based on the uniformity of the surface texture distribution, pressing force, rebound force, and damping coefficient of the button, it is determined whether the button passes the tactile test. And determine the button rebound consistency of the test object based on the rebound force of each button of the test object. If the button rebound consistency meets the predetermined standard, then determine that the test object passes the button feel test.

9. The button feel detection method according to claim 8, characterized in that, The step of driving the capacitive sensing contact to perform a predetermined pattern of pressing operation on the button of the object to be tested further includes: The pressing operation process is divided into a continuous first stage, a second stage, and a third stage. The moving speed of the capacitive sensing contact in the second stage is greater than that in the first stage, and the moving speed of the capacitive sensing contact in the first stage is greater than that in the third stage.

10. The button feel detection method according to claim 9, characterized in that, Also includes: A temperature compensation operation is performed on the force-controlled motor used to drive the capacitive sensing contact, the temperature compensation operation including: Establish a temperature-force drift compensation table; The real-time temperature is obtained, and the driving force compensation value of the force-controlled motor is determined according to the temperature-force drift compensation table. The driving parameters of the force-controlled motor are corrected based on the driving force compensation value.

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