Intelligent surface electromagnetic induction pressure detection touch feedback man-machine interaction method

Abstract

A touch feedback man-machine interaction method comprises the steps that an electric signal of a contact interface and an induction electric signal of a press-down interface are coupled to serve as a judgment basis for judging the true intention of a user to operate an intelligent interface, when it is judged that the intention of the user to control equipment is true, touch information is transmitted to a main control system, and the main control system responds according to the intention of the user; and displaying a corresponding result on an interface. According to the method provided by the invention, through a signal sensing and information feedback mechanism, the real intention of the user to operate the intelligent interface is judged, and the feedback information is provided for the user. Therefore, the experience of contact control is improved, the touch feedback of the user in the interaction process of the intelligent interface is enhanced, the situation that the user accidentally touches the intelligent interface and mistakenly starts the equipment function is avoided, and the experience feeling and reliability of human-computer interaction of the user are enhanced.

Description

Technical Field

[0001] The present invention relates to a method for human-computer interaction, and in particular to a method for providing real-time tactile feedback to user operations on a human-computer interaction interface. Background Art

[0002] Human Machine Interaction (HMI), also known as user interface or user interface, is a medium and dialogue interface for transmitting and exchanging information between people and computers, and is an important part of the computer system. It is a medium for interaction and information exchange between the system and the user, and it realizes the conversion between the internal form of information and the form acceptable to humans. Human-machine interface exists in all fields involved in human-computer information exchange. For example: smartphone touch screen, buttons on the steering wheel of a vehicle, or vehicle control screen, etc.

[0003] In the automotive industry, the human-machine interface is usually manifested as a vehicle interior that combines decoration and functionality. When the user needs it, it is awakened and activated through touch sensing to obtain feedback and response.

[0004] Compared with traditional mechanical buttons, smart surface buttons adopt a non-perforated design. The integrated solution ensures beauty while being dustproof, waterproof, and anti-accidental touch. It has the advantages of high button operation accuracy, real touch, and long service life. There are 30-50 button scenes in the whole car, such as central control, steering wheel, window, door, sunroof, reading light buttons, etc. The design of smart surface buttons is generally composed of an integrated panel, touch buttons, pressure-sensitive buttons, ambient light backlight, and tactile feedback.

[0005] Since most smart surfaces use touch control, for example, when a finger touches the human-machine interface of a device, the device immediately responds, that is, the volume is increased or decreased. As a result, "false touches" that are inconsistent with the user's subjective requirements often occur. For example, a user accidentally touches the interface and actually starts an unnecessary program.

[0006] Another common situation is that when the user touches the interface, the device does not respond as expected, and the user is unclear as to why the device did not respond as expected, such as due to a failure to touch correctly, a device failure, or a program error. Due to the lack of corresponding feedback, users usually touch the interface frequently and increase the force of the touch, or restart the device, etc. This greatly reduces the user's experience of operating the human-machine interface and makes it impossible for them to determine why the device did not respond as expected.

[0007] To solve the above-mentioned "pain points", people provide feedback for the behavior of touching the interface by making "sounds". For example, by adding a buzzer or other generating device to the device to provide feedback to the user, that is, when the user touches the human-machine interface, it will emit a "beep" to feedback to the user that he has successfully touched the surface. However, the sound of the buzzer is harsh and is usually a noise, which is not the sound that the user wants. On the other hand, people around can also hear the sound, and the user has no privacy in operation.

[0008] Lighting feedback is another feedback method, but this method is limited by the need for user observation. If the user cannot observe, the feedback purpose cannot be achieved. For example, when the user is driving, he cannot observe the lights, so he cannot

[0009] Vibration feedback is close to the feedback of traditional mechanical switches, which is easy for users to understand, experience and feel, and can also ensure privacy. For example: CN105068680A discloses a stylus with a tactile vibration function. By making the stylus itself generate tactile vibration feedback, users can experience tactile vibration regardless of whether it is used non-contact or contact with the screen. There is also a piezoelectric sensor device on the outer surface of the stylus, which can sense the force applied by the user's fingers holding the stylus and respond. It can also achieve a similar "pressure sensing" function during non-contact use, and can also adjust the strength of the tactile vibration based on the grip. The tactile vibration of the stylus itself will not interfere with the effect of its "pressure sensing" function and grip detection function. The application of this technology has limitations and cannot be applied to human-computer interaction in a wider range of human-computer interfaces.

[0010] The resistance bridge is a common pressure detection technology solution. The resistance bridge is placed under the pressing surface. When the button is pressed, the pressure resistor is subjected to different forces, and its resistance value shows a constant change direction. If it is subjected to compression, its resistance value will become smaller; if it is subjected to tension, its resistance value will become larger.

[0011] Shrapnel capacitor is a common pressure detection technology solution. A shrapnel is placed under the pressing surface. When the button is pressed, the height of the shrapnel changes with the pressing stroke. The change in shrapnel height brings about a change in capacitance. The pressing force is calculated by the change in capacitance value.

[0012] The eccentric motor is a technical means currently used for vibration feedback. There is an eccentric rotor in the center of the eccentric motor. When the eccentric motor rotates, the eccentric rotor generates a centrifugal force, which causes the eccentric motor to have a small displacement, thereby generating vibration. This vibration feedback felt by people is called tactile feedback. Although this method is simple to drive and has low cost, since the vibration of the eccentric motor is generated by rotation and it takes time to start and stop, the vibration acceleration is relatively small, the response speed is slow, the noise is large, and the omnidirectional vibration lacks directionality, cannot achieve complex vibration effects, and has relatively high energy consumption.

[0013] Piezoelectric ceramic tactile vibrators made of piezoelectric ceramic materials are another means of vibration feedback. When powered, piezoelectric ceramic materials will quickly deform and produce vibrations. They have faster response speeds and more precise vibration control, but the vibration intensity only occurs in a single direction. It is a capacitive load, so single-layer and multi-layer piezoelectric ceramics have different requirements for driving voltage. Usually single-layer piezoelectric ceramic vibrators require higher voltages, while multi-layer piezoelectric ceramic vibrators only require lower voltages, but require larger driving currents. Piezoelectric ceramic vibrators are expensive, and their application range is limited. Summary of the invention

[0014] An object of the present invention is to provide an information interaction feedback method for human-computer interaction of an intelligent interface, to provide tactile feedback, and to improve the experience of contact control.

[0015] Another object of the present invention is to provide an information interaction feedback method to achieve vibration feedback of human-computer interaction in an intelligent interface and improve the experience of contact control.

[0016] Another object of the present invention is to provide an information interaction feedback method, which uses a vibration feedback mechanism to enhance the human-computer interaction experience of the intelligent interface and effectively avoid "wrong" operations that violate the user's true purpose.

[0017] Another object of the present invention is to provide an information interaction feedback method so that users can achieve efficient control of the device with the help of an intelligent interface, reduce invalid operations, and enhance the efficiency of human-computer interaction.

[0018] Human-computer interaction refers to the information exchange process between people (users) and computers using established communication mechanisms, such as buttons, touch or waves, to enable people (users) to transmit information to computers, and computers to respond with feedback to complete the tasks set by people (users).

[0019] The human-computer interface is the user-visible part designed for the purpose of human-computer interaction. It presents the information input and output medium between people (users) and computers, such as: the buttons of a radio, the screen of a mobile phone, or the display of a controller.

[0020] Intelligent interface, a medium for users to control devices conveniently and efficiently, such as fingerprint unlocking and one-click parking.

[0021] The information interaction feedback method of the present invention couples the electrical signal of the contact interface and the induced electrical signal of the pressure interface as a basis for judging the user's true intention of operating the intelligent interface. When the user's intention to control the device is judged to be true, the tactile information is transmitted to the main control system, and the main control system responds according to the user's intention and presents the corresponding results on the interface.

[0022] Another information interaction feedback method includes:

[0023] The electrical signals of the contact interface include sensing and transmitting the user's contact action, such as one-dimensional sliding, two-dimensional movement or clicking (pressing), etc., to obtain the change information of the contact position and its spatial orientation, that is, the tactile information;

[0024] The induced electrical signal of the downward pressure interface includes sensing the displacement and deformation of the interface after being subjected to force, and obtaining the induced electrical signal;

[0025] Determine the user's true intention to control the device based on the induced electrical signal;

[0026] When it is determined that the user's intention to control the device is true, on the one hand, vibration feedback is provided to the interface; on the other hand, the tactile information is transmitted to the main control system, which responds according to the user's intention and presents the corresponding results on the interface.

[0027] The electrical signal of the capacitance change generated by the user's touch on the interface and the induction electrical signal generated by the change of the force applied when the interface is pressed down are coupled.

[0028] The induced electrical signal is obtained by electromagnetic induction, that is, the induced current generated by the displacement or local deformation of the interface due to force. The real intention of the user to control the device is judged based on the collected induced electrical signal.

[0029] When it is determined that the user's intention to control the device is true, a current with waveform characteristics is loaded onto the coil, causing the interface to shift or partially deform and produce a vibration effect by electromagnetic induction, thereby providing the user with a vibration experience and informing the user that the operation is complete.

[0030] The information interaction feedback method of the present invention uses a capacitive film to collect the capacitive signal generated by the position and sliding direction of the user's contact interface, and generates a digital signal through AD conversion to determine the user's touch position and identify the sliding direction.

[0031] The information interactive feedback method of the present invention generates a pressure sensing signal using the electrical signal of the induction coil.

[0032] A specific implementation method for obtaining an induced electrical signal, the two ends of the interface are placed on these elastic bodies, and the interface is placed above the bracket. After being subjected to force, the elastic body undergoes elastic deformation, which is beneficial to the reset of the interface after movement, and on the other hand, the elastic effect is also beneficial to balancing the force applied by the electromagnetic vibrator to the interface, making it easier to achieve the force adjustment of the vibration feedback.

[0033] Another specific implementation method for obtaining the induced electrical signal is to support the interface with an elastic body. When the interface is subjected to downward pressure, the elastic body is deformed, and the interface deforms or displaces downward, thereby generating a force-induced electrical signal; or when the external force is removed, the elastic body is reset, and the interface deforms or displaces upward, thereby generating a reset-induced electrical signal.

[0034] The force-induced electrical signal and the reset-induced electrical signal are converted into digital signals of voltage and time through AD conversion. The positive / negative value of the electrical signal is associated with the force-induced downward pressure and the force-removal and reset state, and the rate of change of the electrical signal is associated with the pressure strength of the interface.

[0035] Judge the electrical signal and obtain the user's true intention of operating the intelligent interface.

[0036] The present invention uses electromagnetic induction as a means to obtain an induced electrical signal, and the method is as follows:

[0037] A first permanent magnet disposed on the lower side of the interface;

[0038] A second permanent magnet is disposed opposite to the first permanent magnet and faces the first permanent magnet;

[0039] A vibration coil is wound around the outer circumference of the second permanent magnet, and a changing current is input into the vibration coil to change the balance state of the force between the first permanent magnet and the second permanent magnet, so that the first permanent magnet is close to the second permanent magnet, or away from the second permanent magnet, and the driving interface is displaced or partially deformed to produce a vibration effect;

[0040] The force induction coil is wound around the outer circumference of the vibration coil, and the interface is displaced or partially deformed by the external force to generate an induced current;

[0041] Based on the collected electrical signal change information, the user's true intention to control the device can be judged.

[0042] Another method of obtaining an induced electrical signal by electromagnetic induction also includes a bracket for accommodating an electromagnetic vibrator. For example, a second permanent magnet is placed in the bracket, a vibration coil is wound around the outer periphery of the second permanent magnet, and a force induction coil is arranged on the outer periphery of the vibration coil.

[0043] There is also a gap between the outer edge of the bracket and the lower side of the interface to provide the required space for displacement or local deformation of the interface, and these spaces are necessary for vibration feedback. In the present invention, the gap should be understood as the space between the outer edge of the bracket and the lower side of the interface, but this does not mean that the bracket and the interface must be completely separated without any contact. For example: a specific implementation method is: the end faces of both ends of the interface are in contact with the local side faces of the bracket, and the interface also moves relative to the bracket with the help of the contact surface, such as: approaching the second permanent magnet, or moving away from the second permanent magnet.

[0044] The information interaction feedback method provided by the present invention also includes controlling the rhythm of turning on and off the light-emitting component (such as LED light) to project light waves onto the interface to provide instructions.

[0045] Beneficial effects achieved by the technical solution of the present invention:

[0046] The method provided by the present invention has a simple structure and lower cost. Compared with the currently known vibration feedback technology, it can achieve complete vibration feedback intensity, waveform and frequency control, and is closer to the feeling of mechanical buttons.

[0047] The method provided by the present invention adopts a contact electric signal and a pressure electric signal coupling mechanism, and uses the electric signal of the capacitance change generated by the user's touch on the interface and the induction signal generated by the force change as the basis for judging the user's true intention to operate the human-machine interface. When the judgment is true, a vibration experience is also provided to the user, and the information of the completion of the operation is fed back to the user. In this way, the experience of contact control is improved, the tactile feedback of the user in the interaction process of the human-machine interface is enhanced, and the user is prevented from accidentally touching the human-machine interface and mistakenly activating the device function, such as: making a phone call due to improper touching during walking, which can effectively avoid the occurrence of "wrong" operations that violate the user's true purpose, and enhance the user's experience and reliability of human-machine interaction.

[0048] The method provided by the present invention adopts electromagnetic induction as a means of pressure detection, which not only has high stability, but also integrates this function into a vibration feedback mechanism, and the system structure is compact and the cost is low.

[0049] In addition, when the operation performed by the user is in line with his or her true intention, the user's ability to judge the operation is improved by providing the user with a vibration feedback experience, so that the user knows that his or her operation intention has been correctly conveyed to the device, and that the device did not produce any execution results, which is not a problem with the user's operation. This prevents the user from performing high-frequency and repeated operations on the human-computer interface when the device fails to respond, effectively reducing invalid operations and enhancing the efficiency of human-computer interaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1A schematic diagram of an embodiment of a device for implementing the information interaction feedback method of the present invention;

[0051] Figure 2 A schematic diagram of another embodiment of a device for implementing the information interaction feedback method of the present invention;

[0052] Figure 3 A schematic diagram of an embodiment of a method for implementing information interaction feedback according to the technical solution of the present invention;

[0053] Figure 4 It is a schematic diagram of an embodiment of the information interaction feedback device of the present invention applied to vehicle control. DETAILED DESCRIPTION

[0054] The technical solution of the present invention is described in detail below with reference to the accompanying drawings. The embodiments of the present invention are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

[0055] The information interaction feedback method of this embodiment couples the electrical signal of the touch interface and the induced electrical signal of the pressure interface as a basis for judging the user's true intention of operating the intelligent interface. When the user's intention to control the device is judged to be true, the tactile information is transmitted to the main control system, and the main control system responds according to the user's intention and presents the corresponding results on the interface.

[0056] The electrical signal of the capacitance change generated by the user's touch on the interface and the induced electrical signal generated by the change in the force of pressing down on the interface are coupled. The electrical signal of the contact interface includes sensing and transmitting the action of the user touching the interface, and obtaining the change information of the contact position and its spatial orientation, that is, the tactile information. The induced electrical signal of the pressed interface includes sensing the displacement and deformation of the interface after the force is applied, and obtaining the induced electrical signal. The real intention of the user to control the device is judged according to the induced electrical signal. When the intention of the user to control the device is judged to be true, on the one hand, vibration feedback is provided to the interface; on the other hand, the tactile information is transmitted to the main control system, which responds according to the user's intention and presents the corresponding results on the interface.

[0057] For example, a current with waveform characteristics is loaded onto the coil, causing displacement or local deformation of the interface to produce a vibration effect by electromagnetic induction, thereby providing the user with a vibration experience and informing the user of the completion of the operation.

[0058] In order to implement the above-mentioned information interaction feedback method, this embodiment also provides a device, including a contact sensing module 10 and a pressure sensing and vibration feedback module 20. The contact sensing module 10 senses and transmits the user's action of contacting the interface, such as: clicking (pressing), and also obtains (collects) the continuity of the user's action on the contact interface and the change in spatial orientation, such as: one-dimensional sliding or movement in a two-dimensional plane space. These are all called tactile information, and usually can only be generated when the user contacts the interface.

[0059] The pressure sensing and vibration feedback module 20 is used to sense the displacement of the interface and obtain the force applied by the user to the interface, so as to judge the real intention of the user to control the device, so that the device can obtain the real intention of the user and complete the response according to the real intention, so as to achieve the efficiency of human-computer interaction. When the displacement or local deformation of the perceived interface exceeds the set threshold, it is considered that the user has the real intention to control the device, rather than "accidental touch", and then the device function corresponding to the touch information is combined, such as fingerprint unlocking, turning on the camera function or one-key parking, etc., and the user's control (operation) intention is transmitted to the main control system of the device, and the main control system presents the response result on the human-computer interface.

[0060] Electromagnetic induction is a reliable means for detecting the amount of displacement or local deformation of an interface. When the force applied by the user on the interface increases, the amount of displacement or local deformation of the interface also increases accordingly, and the current generated in the induction coil also changes. The change in the induced current can be used to determine the user's true intention to control the device. When the user "accidentally touches" the interface, the force applied to the interface is usually small, the amount of displacement or local deformation of the interface is also small, or even negligible, and it is difficult to generate an induced current. When the user has the real intention to control the device, he usually clicks (presses) the interface. Compared with the case of "accidental touch", the force applied to the interface is significantly increased, causing the interface to be displaced or partially deformed, and generating an induced current signal, so that the main control system receives "the user has the real intention to control the device" and causes the device to respond in accordance with the user's real intention, such as: unlocking the device, or turning on the camera function, presenting the camera interface, or parking the vehicle, etc.

[0061] The pressure sensing and vibration feedback module 20 at least includes a vibration feedback device, which includes:

[0062] The force sensing component senses the induced current generated by the displacement or local deformation of the interface due to the force, and determines the user's true intention to control the device based on the intensity information of the collected induced current;

[0063] The electromagnetic vibrator receives the changing current and, through electromagnetic induction, causes the interface to shift or partially deform, thereby producing a vibration effect.

[0064] The main control system responds by providing operational feedback that is consistent with the user's true intention, or presents the result on the human-computer interface to provide feedback to the user, such as presenting the increase or decrease of the volume in a graphical manner on the interface.

[0065] The Main Control System (MCS) should be understood as a comprehensive system built on various subsystems, which is generally composed of all the components (parts) that control the controlled system. The central processing unit is at the core of this system and is one of the most important components in the control system. Its role is to control and coordinate the various components (parts) in the system.

[0066] The pressure sensing and vibration feedback module 20 also includes a device for converting between digital signals and analog signals, and a power amplifier for enhancing the vibration effect.

[0067] Figure 1 FIG. 1 is a schematic diagram of an embodiment of an information interaction feedback device of the present invention. Figure 1 As shown, the device includes a contact sensing module 10 and a pressure sensing and vibration feedback module 20. The contact sensing module 10 includes a contact sensor 100, and the contact sensor 100 includes an interface 110 and a contact sensing mechanism 120. The interface 110 defines the boundary of the interaction between the user and the machine (equipment), which undergoes local deformation or overall displacement after being subjected to a force. The contact sensing mechanism 120 is a capacitive film, which collects the position information of the user contacting the interface, as well as the spatial orientation information of the contact change. For example: the two-dimensional position information when the user contacts (such as: clicks or presses) the interface 110, that is, the specific function that the user intends to trigger the device to implement, such as: turning on the camera, or turning on the music player, etc. The spatial orientation information (one-dimensional or two-dimensional spatial position change information) that occurs after the user contacts the interface is usually presented as a "sliding" feature on the interface, and also corresponds to another type of specific function that the user intends to trigger the device to implement, such as: adjusting a certain function on the output. Adjusting the increase or decrease of the volume is an example of such a specific function. For another example: "sliding" operation on the interface controls the vehicle to move forward or backward under the preset function.

[0068] Another touch sensing module provided in this embodiment sets the capacitive film 121 on the lower side of the interface 110, and sets the capacitive film on the lower side of the interface 110 by means of attachment, bonding or assembly. When the user touches (such as clicking or pressing) the upper side of the interface 110, the capacitive film on the lower side can sense the touch, and with the help of multiple IO inputs, the position information of the user touching the interface and the information collection of the spatial orientation change of the touch are realized, and then the following are judged: 1) the position of the touch, and 2) the direction of the orientation change ("movement") of the touch.

[0069] The present embodiment provides a pressure sensing and vibration feedback module 20 for an information interaction feedback device, which includes a vibration feedback device 200, and the vibration feedback device 200 includes a first permanent magnet 210 and a second permanent magnet 220. The first permanent magnet 210 is arranged on the lower side of the interface 110, and the connection method between the first permanent magnet 210 and the interface 110 is such as: attachment, bonding or assembly. The second permanent magnet 220 is arranged in alignment with the first permanent magnet 210 and faces the first permanent magnet 210.

[0070] The vibration coil 230 is wound around the outer circumference of the second permanent magnet 220. The changing current is input into the vibration coil to change the balance of force between the first permanent magnet and the second permanent magnet, so that the first permanent magnet approaches the second permanent magnet, or moves away from the second permanent magnet, and the driving interface is displaced or partially deformed, generating a vibration effect.

[0071] The force sensing coil 240 is wound around the outer circumference of the vibration coil 230. When the interface 110 is displaced or partially deformed by external force and generates an induced current, the real intention of the user to control the device can be determined based on the intensity information of the collected current. For example, if the induced current is greater than the set threshold, it is considered that the user has the real intention to control the device.

[0072] Furthermore, the induced current collected by the force sensing coil 240 is converted by ADC to form a digital signal of voltage and time relationship. Through the pressure detection algorithm, it can be further judged whether the user has the real intention to control the device. For example: in the state of pressing the interface, or in the state of releasing after pressing the interface. That is, the positive and negative values ​​of the voltage are used to judge the state of pressing the interface or releasing after pressing the interface, and the rate of change of the voltage is used to judge the user's pressing strength, and the user's real intention to control the device is judged, and then the active system responds based on this information.

[0073] On the other hand, according to the user's intention, current is input to the vibration coil 230, and under the action of electromagnetic induction, the interface 110 vibrates to provide interactive feedback to the user. According to different control intentions, various forms of changing currents can also be loaded to generate multiple vibration modes, such as: playing music, vibrating 3 times, and adjusting the volume, vibrating 1 time. Each vibration is also set with different strength changes and time periods to provide a variety of vibration interactive experiences.

[0074] Another vibration feedback device 200 of this embodiment also includes a bracket 250 for accommodating an electromagnetic vibrator. For example, the second permanent magnet 220 is placed in the slot cavity of the bracket 250, the vibration coil 230 is wound around the outer peripheral side of the second permanent magnet 220, and a force induction coil 240 is arranged on the outer peripheral side of the vibration coil 230. The first permanent magnet 210 is fixed on the lower side of the interface 110, and is arranged in alignment with the second permanent magnet 220, and is arranged face to face. There is a magnetic force of mutual attraction between the first permanent magnet 210 and the second permanent magnet 220. The current loaded by the vibration coil 230 provides an opposite force, so that the first permanent magnet 210 and the second permanent magnet 220 maintain a space apart, and no suction occurs. Alternatively, the two ends of the interface 110 are placed on the bracket 250, and the bracket 250 provides support for the interface 110, and the first permanent magnet 210 and the second permanent magnet 220 maintain a space apart.

[0075] A vibration gap 300 is also provided between the bracket 250 and the lower side of the interface 110, which provides the required space for the interface 110 to be displaced or partially deformed, and these spaces are necessary for vibration feedback to occur. In this embodiment, the vibration gap 300 should be understood as the space between the outer edge of the bracket 250 and the lower side of the interface 110, but this does not mean that the bracket 250 and the interface 110 must be completely separated from each other without any contact. For example: a specific implementation is: the end faces of both ends of the interface 110 are in contact with the local side of the bracket 250, and the interface 110 also moves relative to the bracket 250 with the help of the contact surface, such as: approaching the second permanent magnet 220, or moving away from the second permanent magnet 220.

[0076] Figure 2 As shown, elastic bodies 260 are arranged at both ends of the bracket 250, and both ends of the interface 110 are arranged on these elastic bodies 260, showing that the interface 110 is mounted on the top of the bracket 250. After the interface 110 is subjected to force, the elastic body 260 is pressed to displace, that is, the displacement close to the second permanent magnet 220, and an induced current is generated in the induction coil 240. According to the information of this induced current, a digital signal of the forward voltage and time relationship is formed through ADC digital-to-analog conversion, and the pressure detection algorithm is used to determine whether the user has the real intention to control the device. For example: if the voltage and time relationship is greater than the set threshold, it is considered that the user has the real intention to control the device.

[0077] In addition, after the elastic body 260 is deformed, when the external force is removed, the elastic body 260 pushes the interface 110 to reset and displace again, that is, the displacement away from the second permanent magnet 220, and the induced current is generated again in the induction coil 240, and the ADC digital-to-analog conversion is performed again to form a digital signal with a negative voltage and time relationship, so as to obtain the time interval of the user clicking on the interface, and further judge whether the user has the real intention to control the device. For example: if the time when the user presses the interface and releases the interface is too short, it is considered that there is a "false touch" situation, which is not the real intention of the user to control the device, or the user changes his intention after touching the interface. On the other hand, the elastic effect provided by the elastic body 260 is also conducive to balancing the force applied by the electromagnetic vibrator to the interface 110 (for example: the magnetic force from the second permanent magnet), so that the force adjustment of the vibration feedback is easier to achieve.

[0078] While the device of this embodiment provides vibration feedback, light feedback can also be used, such as lighting up an LED to illuminate the interface or provide flashing, etc. Technicians can know and implement it through currently used products and apply it to the device of this embodiment. Figure 1 and Figure 2 As shown, the LED is disposed in the slot cavity of the bracket 250. When lit, the light waves act on the interface 110 to provide an indication.

[0079] Figure 3 This is a schematic diagram of an embodiment of a method for implementing information interaction feedback using the technical solution of the present invention. Figure 3 As shown, it includes a signal sensing system and a feedback system. The capacitive film (input 1) and the pressure sensor / induction coil (input 2) sense the signals respectively and then merge them. That is, the capacitive film generates a capacitive signal (position and sliding direction), which is converted by AD and then the touch position and sliding direction are determined by the algorithm. The pressure sensor / induction coil (input 2) generates a pressure sensing signal, which is converted by AD and the pressing state is identified by the algorithm. If the capacitive signal and the pressure sensing signal are both true, it indicates that the user has the real intention to control the device, thereby triggering a vibration feedback signal and other control signals, such as: a signal provided to the main control system.

[0080] After receiving the vibration feedback signal, the sending of the corresponding waveform library file (vibration) is controlled according to the identified key position / sliding direction. The small current with waveform characteristics is transformed into a large current with waveform characteristics through the power amplifier, causing the exciter to vibrate and provide vibration feedback to the user.

[0081] In addition, after receiving the vibration feedback signal, it also controls the switch of the LED, provides LED state changes, and realizes LED light control.

[0082] See also Figure 1 and Figure 2, the contact sensing mechanism receives the contact from the interface and generates a corresponding electrical signal of the contact. These electrical signals can usually be obtained by using a capacitive film. Then, through multiple IO inputs, such as a capacitive detection algorithm, the position information of the user's contact interface and the spatial orientation change of the contact are collected and stored, and then the following are determined: 1) the position of the contact, and 2) the direction of the orientation change ("movement") of the contact.

[0083] Synchronously, when the user has the intention (hopes that the device will respond) to the interface (such as clicking or pressing), a force is applied to the interface, causing the interface to displace or partially deform, generating an induced current. Based on the electrical signal obtained by induction, the user's true intention to control the device can be determined. When the electrical signal is greater than the set threshold, it is considered that the user has the true intention to control the device, and the electrical signal obtained by induction is combined with the electrical signal generated by the contact and provided to the main control system through CAN / LIN, and the main control system provides a response.

[0084] When the user has the real intention to control the device, the current is also loaded to the electromagnetic vibrator to generate a vibration effect through electromagnetic induction. This feedback can be implemented by the main control system, or by other components or by circuit control. For example: when the electrical signal is greater than the set threshold, the current is loaded to the electromagnetic vibrator, and under the action of electromagnetic induction, the interface moves at a high frequency and narrow range, so that the user (such as: finger) feels the vibration effect, and provides the user with feedback that the operation is completed (or the command is completed). If the device responds, it can be seen on the interface, or it can be observed or experienced through the five senses. If the device does not respond, it means that the device has a fault, not improper or invalid user operation. It is necessary to further find the fault, rather than continue to increase the frequency or strength of operations (such as: clicks or presses), effectively improving the efficiency and experience of human-computer interaction.

[0085] Each vibration is also set with different intensity changes and time periods to provide a variety of interactive vibration experiences. Pulse currents with various current intensities and time intervals are loaded into the electromagnetic vibrator. Under the action of electromagnetic induction, the interface vibrates in different intensities, rhythms and periods, providing users with personalized interactive feedback. According to different control intentions, these different vibration forms can be combined to provide corresponding vibration mode feedback according to the control intention. For example: unlock the screen, vibrate 3 times, one long and two short. Another example: lower the volume, vibrate 3 times, each vibration is weaker than the previous one.

[0086] Figure 4 FIG. 1 is a schematic diagram of an embodiment of the information interaction feedback device of the present invention applied to vehicle control. Figure 4As shown, (user) finger touches or slides (interface) surface, triggering capacitive touch detection, through multiple IO port input, and capacitive detection algorithm, to obtain the detected touch position and detected sliding direction, the user's (touch) position information determines which function is triggered. The user's touch sliding direction information determines the function adjustment trend, such as: increase or decrease, and forward or backward.

[0087] The intentional (user) touches or slides the (interface) surface with a finger, usually accompanied by force. Therefore, the finger presses the surface at the same time, and the pressing force of the finger acts on the permanent magnet (surface) on the elastic structure, so that the permanent magnet moves according to the intensity of the pressing force, and the changing magnetic field acts on the (detection) coil. The generated induced current is converted into a digital signal of voltage and time through the ADC analog-to-digital converter. The positive / negative value of the voltage is associated with the state of pressing or relaxing, and the voltage change rate is associated with the pressing intensity, thereby forming the pressing state information. The function initiated by the user's intention is obtained in conjunction with the capacitance detection algorithm, and the pressing intensity required to trigger the function is adjusted so that when the sensitivity threshold is exceeded, the function initiated by the user's intention is triggered, for example: the user's intention is transmitted to the active system, and the active system (the whole vehicle) controls the cockpit, seats, air conditioning, doors and windows, etc.

[0088] Synchronously, the feedback method is determined according to the user's intention, including the content and intensity of the feedback vibration. Vibration waveform number intensity information is used to form a vibration waveform library, which includes waveform and intensity information. After DAC digital-to-analog conversion, a small current with waveform information is obtained through a power amplifier to obtain a large current with waveform information, and then the (excitation) coil (i.e., vibration coil 230, see Figure 1 and Figure 2 ), generates a changing magnetic field with waveform information, which acts on the permanent magnet (surface) on the elastic structure. The permanent magnet (surface) vibrates with the changing magnetic field, presenting intelligent surface vibration (feedback), allowing the user (such as: finger) to feel the vibration effect, and providing the user with feedback that the operation is completed (or the command is completed).

Claims

1. An information interaction feedback method, characterized in that The electrical signal of the touch interface and the induced electrical signal of the pressure interface are coupled as a basis for judging the user's true intention of operating the intelligent interface. When the user's intention to control the device is judged to be true, the tactile information is transmitted to the main control system, which responds according to the user's intention and presents the corresponding results on the interface.

2. The information interactive feedback method according to claim 1, characterized in that The electrical signal of the capacitance change generated by the user's touch on the interface and the induction electrical signal generated by the change of the force applied when the interface is pressed down are coupled.

3. The information interactive feedback method according to claim 1, characterized in that The electrical signal of the contact interface includes sensing and transmitting the user's contact action on the interface, obtaining the change information of the contact position and its spatial orientation, that is, the tactile information; The induced electrical signal of the downward pressure interface includes sensing the displacement and deformation of the interface after the force is applied, and obtaining the induced electrical signal; Determine the user's true intention to control the device based on the induced electrical signal; When it is determined that the user's intention to control the device is true, on the one hand, vibration feedback is provided to the interface; on the other hand, the tactile information is transmitted to the main control system, which responds according to the user's intention and presents the corresponding results on the interface.

4. The information interactive feedback method according to claim 3, characterized in that The induced electrical signal is obtained by electromagnetic induction, that is, the induced current is generated by displacement or local deformation of the interface due to force. The real intention of the user to control the device is judged based on the collected induced electrical signal.

5. The information interactive feedback method according to claim 3, characterized in that When it is determined that the user's intention to control the device is true, a current with waveform characteristics is loaded onto the coil, causing the interface to shift or partially deform and produce a vibration effect by electromagnetic induction, thereby providing the user with a vibration experience and informing the user that the operation is complete.

6. The information interactive feedback method according to claim 3, characterized in that The capacitive film collects the capacitive signal generated by the position and sliding direction of the user's contact interface, and generates a digital signal through AD conversion to determine the user's touch position and identify the sliding direction.

7. The information interactive feedback method according to claim 3, characterized in that The pressure sensing signal is generated by the electrical signal of the induction coil.

8. The information interactive feedback method according to claim 1, characterized in that It also includes controlling the rhythm of turning on and off the light-emitting components to project light waves onto the interface to provide instructions.

9. The information interactive feedback method according to claim 1, characterized in that The interface is supported by an elastic body. When the interface is subjected to downward pressure, the elastic body is deformed, and the interface deforms or moves downward, generating a force-induced electrical signal. When the external force is removed, the elastic body is reset, and the interface deforms or moves upward, generating a reset-induced electrical signal. Judge the induced electrical signal and obtain the user's true intention of operating the intelligent interface.

10. The information interactive feedback method according to claim 9, characterized in that The force-induced electrical signal and the reset-induced electrical signal are converted into digital signals of voltage and time through AD conversion. The positive / negative value of the electrical signal is associated with the force-induced downward pressure and the force-removal and reset state, and the rate of change of the electrical signal is associated with the pressure strength of the interface. Judge the electrical signal and obtain the user's true intention of operating the intelligent interface.

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