WO2019154442A1 - Appareil et procédé de détection de force dynamique ou quasi-dynamique - Google Patents

Appareil et procédé de détection de force dynamique ou quasi-dynamique Download PDF

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Publication number
WO2019154442A1
WO2019154442A1 PCT/CN2019/081570 CN2019081570W WO2019154442A1 WO 2019154442 A1 WO2019154442 A1 WO 2019154442A1 CN 2019081570 W CN2019081570 W CN 2019081570W WO 2019154442 A1 WO2019154442 A1 WO 2019154442A1
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Prior art keywords
dynamic
signal
elastic wave
quasi
touch
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PCT/CN2019/081570
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English (en)
Chinese (zh)
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北京钛方科技有限责任公司
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Publication of WO2019154442A1 publication Critical patent/WO2019154442A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position

Definitions

  • the present application relates to the field of electromechanical interaction, and more particularly to a dynamic or quasi-dynamic force detecting device and method.
  • the composition of the touch screen generally includes a touch panel, a touch response component, a touch control system, a driver, and the like.
  • the main technical solutions adopted by the touch response components include resistive type, capacitive type, infrared type, surface acoustic wave type, etc. These technical solutions have a common disadvantage in addition to the limitations of the self-generated technology, that is, they usually only provide position information. No pressure or strength information is available.
  • the technical solution adopts a contact brush and a plurality of resistance layers to form a resistor network.
  • a touch resistance is generated at the touch point, and then converted into a current signal to complete the measurement of the touch pressure.
  • This solution also has a complex structure, the thickness does not meet the design requirements of portable devices on the market, and can only provide static pressure or velocity information.
  • the purpose of the present application is to solve the problem that the pressure sensing device in the prior art has a complicated structure, a high cost, and a large limitation.
  • the present application specifically provides a dynamic or quasi-dynamic force detecting device, which is dynamic or quasi-dynamic.
  • the force detecting device specifically includes: a substrate, a piezoelectric sensing module, and a signal analyzing module; the substrate is configured to generate an elastic wave signal according to the touch; the piezoelectric sensing module is connected to the substrate, and the The elastic wave signal is converted into a voltage signal; the signal analysis module is connected to the piezoelectric sensing module, and is configured to calculate a fluctuation change value of the voltage signal according to the voltage signal, and obtain a touch according to the fluctuation change value. Touch the generated velocity information.
  • the present application also provides a dynamic or quasi-dynamic force detection sensing method, the method comprising: receiving an elastic wave signal generated by a touch on a substrate; converting the elastic wave signal into a voltage signal; and calculating according to the voltage signal Obtaining a fluctuation change value of the voltage signal, and calculating the velocity information generated by the touch according to the fluctuation variation value.
  • the present application also provides an electronic device comprising a memory, a processor, and a computer program stored on the memory and operable on the processor, the processor implementing the method when the computer program is executed.
  • the application also provides a computer readable storage medium storing a computer program for performing the above method.
  • the beneficial technical effect of the present application is that the dynamic or quasi-dynamic force detecting device and method provided by the application can provide effective three-dimensional force information, and has the advantages of simple structure and wide applicability, and can be applied to a virtual keyboard, a car electronic, a smart home. , robots, aerospace and other fields.
  • FIG. 1 is a schematic diagram of a dynamic or quasi-dynamic force detecting device according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a dynamic or quasi-dynamic force detecting device according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of a dynamic or quasi-dynamic force detecting apparatus applied to a smart phone according to an embodiment of the present application
  • FIG. 4 is a schematic diagram of a dynamic or quasi-dynamic force detecting device applied to a portable computer according to an embodiment of the present application
  • FIG. 5A is a schematic structural diagram of a dynamic or quasi-dynamic force detecting apparatus according to an embodiment of the present application.
  • FIG. 5B is a schematic diagram of the use of a dynamic or quasi-dynamic force detecting apparatus according to an embodiment of the present application.
  • FIG. 6 is a schematic flowchart diagram of a dynamic or quasi-dynamic force detection method according to an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a system configuration of an electronic device according to an embodiment of the present application.
  • an embodiment means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in the present application. At least one embodiment or example.
  • the schematic representation of the above terms does not necessarily mean the same embodiment or example.
  • the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.
  • the order of the steps involved in the embodiments is used to schematically illustrate the implementation of the present application, and the order of the steps is not limited, and may be appropriately adjusted as needed.
  • the dynamic or quasi-dynamic force detecting device may include a substrate 101 , a piezoelectric sensing module 102 , and a signal analyzing module 103 ; wherein the substrate 101 may be a The rigid medium or a combination thereof acts to generate an elastic wave signal when an external object (such as a finger, a stylus, etc.) touches the substrate 101, and the elastic wave signal is captured by the piezoelectric sensing module 102 and converted into The voltage signal having the same frequency as the elastic wave signal is of course only for the convenience of later calculation, so that the converted voltage signal can be the same as the frequency of the elastic wave signal, and can be converted into a voltage signal of a different frequency in actual operation, and the calculation is later.
  • an external object such as a finger, a stylus, etc.
  • the signal analysis module 103 calculates and calculates the difference between the voltage signal and the voltage signal under the reference voltage signal.
  • the fluctuation value of the voltage signal is further obtained according to the correlation between the fluctuation value and the velocity, and the velocity information when the external object is touched is obtained. Detection.
  • the material of the substrate 101 in this embodiment may not only be a rigid medium or a combination thereof, but also other conductive media capable of conducting elastic waves; the substrate 101 may also be selected according to specific needs in structure.
  • the signal analysis module 103 can be an existing processing chip with a computational analysis function, a single chip device, etc.; in actual work, the staff can Actual need to choose to use, this application does not impose too many restrictions here.
  • the reference value between the position of the elastic wave signal and the distance between the piezoelectric sensor is further referred to.
  • the dynamic or quasi-dynamic force detecting device provided by the present application includes a position detecting module, and the piezoelectric sensing module can be one or more piezoelectric sensors, and the piezoelectric sensor functions as The elastic wave signal is converted into a voltage signal of a corresponding frequency, and then the energy value of the elastic wave is calculated by using the fluctuation of the wave represented by the late use frequency; of course, in actual work, when the elastic wave signal is converted into a voltage signal, it can also be transformed.
  • the position detecting module may further calculate position information of the touch of the external object according to the elastic wave information, wherein the positioning is obtained by using the elastic wave to obtain the position information.
  • the method is similar to the prior art, and the propagation distance of the elastic wave is determined by the time difference of the elastic wave received by the piezoelectric sensor at each point, and the position of the elastic wave signal is generated according to the propagation distance, and the specific process and method are not detailed here. Said.
  • the piezoelectric sensor may be directly or indirectly mounted in the substrate or on the surface, and the elastic wave signal obtained by using the piezoelectric sensor disposed at an appropriate position, the calculated distance reference value and the elastic wave are obtained.
  • the attenuation ratio on the substrate can be calculated by inversely calculating the energy condition when the elastic wave signal is generated, that is, the fluctuation value.
  • the distance L between the sensors, the propagation velocity v of the elastic wave signal on the substrate, and the degree of attenuation f and the final received elastic wave signal Initially available energy is the case when the elastic wave signal generator E, in order to further calculate a more realistic intensity information.
  • the method for obtaining the distance in actual work is not only the above method, but the distance can also be used for other strength information correction, and other methods for obtaining the above distance will be specifically described later, and will not be described in detail herein.
  • the signal analysis module in the dynamic or quasi-dynamic force detecting device in an embodiment of the present application is further configured to: when the piezoelectric sensing module includes a plurality of piezoelectric sensors, output a voltage signal of each piezoelectric sensor. Calculating the fluctuation value corresponding to each piezoelectric sensor separately; accumulating the fluctuation change value to calculate the velocity information generated by the touch; specifically, one or more piezoelectric sensors C 1 to C n may be used to receive each The obtained elastic wave signals are respectively converted into voltage signals D 1 to D n which are in accordance with the frequency of the elastic wave signals received therefrom, and the energy values E 1 of the respective voltage signals are respectively calculated according to the fluctuation values of the respective voltage signals D 1 to D n .
  • the total energy value of the elastic wave can reflect the pressure information generated by the substrate under the touch state, thereby obtaining actual strength information; it is worth noting that, in the above process in, The method of calculating the energy value based on the voltage signal can be mainly calculated by the following formula: or
  • m is the number of signal points collected
  • n is the number of signal points determined by selecting the wavelength of the voltage signal of a predetermined length according to actual conditions, and those skilled in the art can select settings according to actual needs, and the present application does not further limit here.
  • E is the energy value of the voltage signal.
  • the energy value of the elastic wave obtained above is used to determine the range of the force, for example, according to the energy value of the elastic wave, a plurality of strength grading thresholds, such as F1, F2, and F3, wherein F1 represents the minimum gear strength, Corresponding to the energy value of E1 to Ex, F2 represents the mid-range strength, which can correspond to the energy value of Ex+1 to En-y, and F3 represents the highest-grade strength, which can correspond to the energy value of En-y+1 to En;
  • the velocity grading thresholds (E1 to Ex, Ex+1 to En-y, En-y+1 to En) establish a mapping table corresponding to the output instructions; comparing the energy values of the elastic waves with the velocity grading thresholds And outputting a corresponding output instruction according to the comparison result and the mapping table; thereby, when the actual operation is later, the external device performs different operations according to different output instructions, thereby providing a more diverse selection of users.
  • the maximum value or the minimum value of the fluctuation change value occurring in the predetermined period may be used as the characterization signal, and the tempo information is obtained according to the characterization signal;
  • the value can be used to calculate the actual touch force of the elastic wave signal only by extracting the maximum value or the minimum value in the fixed period; of course, those skilled in the art can also calculate the characteristics of the fluctuation value by other means, and then This feature is used as a basis for calculating actual velocity information; the present application is not limited herein.
  • the position detecting function of the existing electronic device can be utilized.
  • Position determination for example, when applied to a smartphone device, determining a horizontal and vertical coordinate position of the touch position through a touch screen of the smart phone, and calculating a position between the horizontal and vertical coordinate positions and the position of the piezoelectric sensor Deep Touch Distance, in order to provide accurate distance reference value for subsequent strength determination.
  • the smart device uses the resistance on the screen, the position of the capacitance to change the position of the touch, or the optical or infrared method. Without limitation, those skilled in the art can choose to use according to actual needs.
  • the signal analysis module may also be implemented by using other component combinations or specific chips, such as the interface module and the central processing module 304, 405 in FIG. 3 to FIG. 4, which is not specifically limited herein.
  • the position information may be used to calculate the velocity information generated by the actual touch and whether the touch is the true intention of the user;
  • the manner in which the velocity information is calculated according to the location information has been explained in the above description, and will not be described in detail herein.
  • the manner of determining whether the touch is the user's true intention according to the location information will pass.
  • the subsequent anti-missing detection module uses specific examples and will not be described in detail here.
  • a pressing keyboard is mainly involved, and the keyboard includes a substrate 301, a keyboard film 302, a housing 303, a central processing module 304, and a voltage sensor 305, so as to facilitate data collection accuracy.
  • the voltage sensor may be disposed at four corners of the keyboard film 3002, and the substrate 301 is disposed on the keyboard film 302. The two may be directly connected or connected by other media capable of conducting elastic waves, and the housing 303 is used to protect the above.
  • the interface module is electrically connected to the voltage sensor 305 via a flat wire connected FFC or other means for outputting the voltage signal converted by the voltage sensor 305 to the central processing module 304, and then according to the central processing module 305.
  • a dynamic or quasi-dynamic force detecting device is provided on a portable computer.
  • the portable computer includes a display 401, a substrate 402, a keyboard film 403, a housing 404, a central processing module 405, and a voltage sensor 406, which are the same as the keyboard example in FIG. 3.
  • the substrate 402 is used to obtain a touch.
  • the strength information is obtained by the subsequent central processing module 405, and the velocity information is forwarded to the processing chip of the portable computer through the interface module, and the output is displayed by the display 401 after being processed by the processing chip;
  • the dynamic or quasi-dynamic force detecting device provided by the present application can be relatively simply applied to an existing portable computer or other smart device. In this way, the overhead of components such as a capacitive touch screen in the existing device can be omitted, and the structure is relatively simple. The occupied space is small and the applicability is strong.
  • the signal analysis module may further include a signal pre-processing unit, after converting the elastic wave signal into a voltage signal of the same frequency. Further performing one or more processing of filtering processing, amplification processing, rectification processing, switching processing, Fourier transform processing, and wavelet transform processing, thereby further eliminating unnecessary errors caused by irrelevant signal data on post-calculation results,
  • a signal pre-processing unit after converting the elastic wave signal into a voltage signal of the same frequency. Further performing one or more processing of filtering processing, amplification processing, rectification processing, switching processing, Fourier transform processing, and wavelet transform processing, thereby further eliminating unnecessary errors caused by irrelevant signal data on post-calculation results.
  • the dynamic or quasi-dynamic force detection apparatus may include a central processing module, an interface module, a plurality of sensor modules, and a device system interface, where the central processing module and the device system interface are And the interface module is a signal analysis module, and the sensor module includes the piezoelectric sensor module provided by the present application; in actual use, the device system interface can be connected to an external device, so that the dynamic or quasi-dynamic force detecting device Can effectively interface with external devices.
  • the dynamic or quasi-dynamic force detecting device provided by the present application is preferably used in various fields such as smart furniture and vehicles, for example, the dynamic or quasi-dynamic force is used.
  • the detecting device is added to the existing storage cabinet 501 and used in conjunction with a controllable unlocking structure to enable the dynamic or quasi-dynamic force detection when the user presses a specified position or all areas on the storage cabinet 501 to a certain strength.
  • the device outputs an unlocking command to the controllable unlocking structure, and the storage cabinet 501 completes the opening and closing operation.
  • the pressing receiving position of the storage cabinet 501 can be specified, and the pressing position is indistinguishable from other regions.
  • the owner of the non-storage cabinet 501 cannot confirm the switch position through the appearance of the storage cabinet, so that the storage cabinet 501 has high privacy, which further ensures the safety of the user; similarly, it is known that the driver cannot effectively use the vehicle 502 when driving. It is confirmed whether a slight collision occurs outside the vehicle 502. When the vehicle 502 is running, the vehicle 502 cannot be detected in time because it cannot be detected.
  • the situation often leads to the intensification of late collisions, resulting in unnecessary loss of personal and property; based on this problem, by placing the dynamic or quasi-dynamic force detecting device provided by the present application inside the vehicle body, when the vehicle 502 collides more than certain At the time of the force, the driver can be prompted to collide with the warning device to prevent the driver from continuing the current action to intensify the collision and cause unnecessary loss; of course, the dynamic or quasi-dynamic force detecting device provided by the application is not only applicable to In the above-mentioned field, in actual work, the staff can appropriately use it in the field of requiring force judgment and detection according to actual needs, and the present application is not limited herein.
  • the dynamic or quasi-dynamic force detection is performed.
  • the device may further comprise an anti-collision detection module, wherein the anti-collision detection module is configured to compare the duration and/or the signal strength of the elastic wave signal generated on the substrate with a predetermined threshold, and determine the current elasticity according to the comparison result. Whether the wave signal is a false touch.
  • the strength anti-missing detection module performs a monitoring state, and at this moment, the current time T0 and the elastic wave signal end time T1 are recorded, and the difference time t between T1 and T0 is The predetermined threshold is compared, and it is determined whether the touch is a false touch according to the comparison result. For example, when the time exceeds a predetermined threshold or is lower than a predetermined threshold, the non-user active behavior is represented, and the touch behavior is ignored.
  • Elastic wave signal when judging whether the elastic wave signal generated when the touch is a false touch, the intensity of the elastic wave signal can also be included in the judgment range, for example, when the elastic wave signal is received, the elastic wave is judged
  • the intensity of the signal if less than or greater than F1, means that the elastic wave signal is not actively applied by the user, and the elastic wave signal generated by the touch behavior is also ignored at this moment;
  • the anti-collision detection module may further compare the position information with a predetermined position area, and determine, according to the comparison result, whether the current elastic wave signal is an accidental collision. For example, when using a smart device such as a portable computer, an elastic wave is generated when a touch is made outside the screen, but at this time, the touch is not the user's operation intention, and the touch position and the predetermined position can be determined at this moment (smart device)
  • the comparison result of the operation area determines whether the touch is the user's true intention; of course, sometimes even if the user touches in the designated area, it is not necessarily the user's real operation intention, for example, the user will use a smart device such as a mobile phone.
  • the operation interface of the mobile phone is also elastic wave when it contacts other external objects, but the elastic wave is not the operation of the user; for this reason, the anti-missing detection module can also Comparing the duration and/or the signal strength of the elastic wave signal generated on the substrate with a predetermined threshold, and determining whether the current elastic wave signal is an accidental collision according to the comparison result; thereby further confirming the operation time or operation condition Whether the operation is the user's true intention.
  • the staff can determine whether the received elastic wave signal is a false touch by combining one or more of the above-mentioned ones or more by the judgment method.
  • the present application does not impose any limitation here.
  • the present application further provides a dynamic or quasi-dynamic force detection method, the method specifically includes: S601 receives an elastic wave signal generated by a touch on a substrate; S602 converts the elastic wave signal into a voltage signal. S603 calculates and obtains a fluctuation change value of the voltage signal according to the voltage signal, and calculates, according to the fluctuation change value, velocity information generated by the touch.
  • the main flow is that the substrate can be a rigid medium or a combination thereof, and the elastic wave propagation medium acts to generate an elastic wave signal when an external object (such as a finger, a stylus, etc.) touches the substrate.
  • the elastic wave signal is captured by a sensor such as a piezoelectric sensing module, and converted into a voltage signal having the same frequency as the elastic wave signal, thereby retaining the energy characteristic of the elastic wave signal; thereafter, the signal analysis module Obtaining a fluctuation variation value of the voltage signal according to a difference between the voltage signal and a standard voltage signal (a voltage signal under a reference voltage signal), and obtaining the externality according to the correlation between the fluctuation variation value and the velocity
  • the velocity information is detected when the object touches.
  • the above step S102 further includes: after converting the elastic wave signal into a voltage signal of the same frequency, further performing filtering processing, amplification processing, rectification processing, switching processing, Fourier transform processing, and wavelet processing.
  • One or more processes in the transform process to obtain a pre-processed signal; thereby further eliminating unnecessary errors caused by the unrelated signal data on the post-calculation result, when the above signal processing flow can be completed by the prior art, This will not be introduced one by one.
  • a difference between the pre-processed signal and the voltage reference value is calculated to obtain the fluctuation change value.
  • the above step S602 further includes intercepting the predetermined length signal segment of the elastic wave signal according to the current detection environment for subsequent conversion processing, Specifically, according to the degree of attenuation of the elastic wave in the current detection environment, the propagation condition of the propagation medium, the touch form of the touch may be taken to intercept the waveform data of different lengths of the elastic wave signal, and then the waveform data is converted into the corresponding frequency.
  • the voltage signal is used to calculate the velocity information when the touch is generated; of course, in the step of converting the waveform data into a voltage signal of a corresponding frequency, the voltage signal may be converted into a voltage signal of another frequency, and then according to the voltage signal. After the strength information is calculated, the velocity information is matched with the actual strength, and the velocity information represents the actual strength.
  • the conversion frequency is further limited when the elastic wave signal is converted into a voltage signal. Personnel can choose to use according to actual needs.
  • a reference value of the distance between the position where the elastic wave signal is generated and the piezoelectric sensor is further referred to, for example, in the above step S103.
  • the method further includes: acquiring position information of the elastic wave signal generated by the touch on the substrate according to the elastic wave signal; and calculating velocity information generated by the touch according to the fluctuation variation value and the position information.
  • the method further includes comparing the duration and/or the signal strength of the elastic wave signal generated on the substrate with a predetermined threshold, and determining whether the current elastic wave signal is an accidental collision according to the comparison result.
  • the strength anti-missing detection module performs a monitoring state, and at this moment, the current time T0 and the elastic wave signal end time T1 are recorded, and the difference time t between T1 and T0 is The predetermined threshold is compared, and it is determined whether the touch is a false touch according to the comparison result. For example, when the time exceeds a predetermined threshold or is lower than a predetermined threshold, the non-user active behavior is represented, and the touch behavior is ignored.
  • Elastic wave signal when judging whether the elastic wave signal generated when the touch is a false touch, the intensity of the elastic wave signal can also be included in the judgment range, for example, when the elastic wave signal is received, the elastic wave is judged If the strength of the signal is less than or greater than F1, it means that the elastic wave signal is not actively applied by the user. At this moment, the elastic wave signal generated by the touch action is also ignored. In actual work, the staff can set the above two according to actual needs. One or a combination of the two determines whether the received elastic wave signal is an accidental touch. The present application does not impose any limitation here.
  • K is a negative number, that is, when the frequency is higher, the strength becomes smaller after being corrected.
  • the correction coefficient Ks is pre-stored in the signal analysis module, and the correction coefficient Ks is selected according to different frequencies and set in advance. Those skilled in the art can provide the appropriate detection test in the early stage, and the present application will not be described here.
  • the dynamic or quasi-dynamic velocity detection method described in an embodiment of the present application may further include: The elastic wave signal generated on the substrate is periodically analyzed, when the periodicity of the elastic wave signal meets a preset condition; an effective signal is obtained by removing the periodic signal component in the elastic wave signal, and according to the effective signal The velocity information generated by the touch is obtained by calculation. In this way, the interference caused by the periodic interference source to the actual velocity detection can be further reduced by the above manner.
  • the dynamic or quasi-dynamic velocity detecting method provided by the present application may further convert each received elastic wave signal into the received one by using one or more piezoelectric sensors C 1 to C n .
  • acoustic wave frequency of the voltage signal of the same signal D 1 to D n each voltage signal is then calculated in accordance with values of the fluctuating voltage signals D 1 to D n are the energy values E 1 through E n, and then finally to an energy value E 1
  • the accumulation of one or more values in E n obtains the final total energy value of the elastic wave.
  • the total energy value of the elastic wave can reflect the pressure information generated by the substrate under the touch state, thereby obtaining actual velocity information.
  • the method of calculating the energy value based on the voltage signal can be mainly calculated by the following formula: or
  • m is the number of signal points collected
  • n is the number of signal points determined by selecting the wavelength of the voltage signal of a predetermined length according to actual conditions, and those skilled in the art can select settings according to actual needs, and the present application does not further limit here.
  • E is the energy value of the voltage signal.
  • the energy value of the elastic wave obtained above is used to determine the range of the force, for example, according to the energy value of the elastic wave, a plurality of strength grading thresholds, such as F1, F2, and F3, wherein F1 represents the minimum gear strength, Corresponding to the energy value of E1 to Ex, F2 represents the mid-range strength, which can correspond to the energy value of Ex+1 to En-y, and F3 represents the highest-grade strength, which can correspond to the energy value of En-y+1 to En;
  • the velocity grading thresholds (E1 to Ex, Ex+1 to En-y, En-y+1 to En) establish a mapping table corresponding to the output instructions; comparing the energy values of the elastic waves with the velocity grading thresholds And outputting a corresponding output instruction according to the comparison result and the mapping table; thereby, when the actual operation is later, the external device performs different operations according to different output instructions, thereby providing a more diverse selection of users.
  • the present application further provides an electronic device, which may be a desktop computer, a tablet computer, a mobile terminal, etc., and the embodiment is not limited thereto.
  • the electronic device may refer to the implementation of the foregoing method and the foregoing apparatus, and the content thereof is incorporated herein, and the details are not described again.
  • FIG. 7 is a schematic block diagram of a system configuration of an electronic device 600 according to an embodiment of the present application.
  • the electronic device 600 can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100.
  • the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
  • the velocity information calculation process can be integrated into the central processor 100.
  • the central processing unit 100 may be configured to perform control to obtain a fluctuation variation value of the voltage signal according to the voltage signal, and calculate velocity information generated by the touch according to the fluctuation variation value.
  • the calculating, by the voltage signal, the fluctuation change value of the voltage signal comprising: obtaining the fluctuation change value according to a difference between the pre-processed signal and the voltage reference value.
  • the obtaining the velocity information generated by the touch according to the fluctuation variation value includes: forming a maximum or minimum value of the fluctuation variation value in a predetermined period as a characterization signal, and obtaining the velocity information according to the characterization signal.
  • the calculating the velocity information generated by the touch according to the fluctuation variation value includes: comparing the location information with a predetermined location region, and determining, according to the comparison result, whether the current elastic wave signal is an accidental collision;
  • the elastic wave signal into a voltage signal of a corresponding frequency by one or more piezoelectric sensors; calculating an energy value of the elastic wave according to the fluctuation value of the one or more voltage signals, according to the elastic wave
  • the energy value obtains the velocity information generated by the touch; if the fluctuation value is accumulated and/or averaged according to the predetermined length of the voltage signal, the energy value of the voltage signal is obtained; according to the one or more voltage signals
  • the energy values are accumulated and/or averaged to obtain the energy value of the elastic wave.
  • the central processing unit 100 may be configured to perform control of: dividing a plurality of strength grading thresholds according to the energy value of the elastic wave; establishing a mapping table of output instructions corresponding thereto according to the grading threshold; and the elastic wave The energy value is compared with the velocity ranking threshold, and a corresponding output instruction is output according to the comparison result and the mapping table.
  • the electronic device 600 may further include: a communication module 110 , an input unit 120 , a piezoelectric sensor 130 , a display 160 , and a power source 170 . It should be noted that the electronic device 600 does not have to include all the components shown in FIG. 7; in addition, the electronic device 600 may further include components not shown in FIG. 7, and reference may be made to the prior art.
  • central processor 100 also sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls various components of electronic device 600. The operation of the part.
  • the memory 140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device.
  • the above-mentioned information related to the failure can be stored, and a program for executing the related information can be stored.
  • the central processing unit 100 can execute the program stored by the memory 140 to implement information storage or processing and the like.
  • Input unit 120 provides input to central processor 100.
  • the input unit 120 is, for example, a button or a touch input device.
  • the power source 170 is used to provide power to the electronic device 600.
  • the display 160 is used to display a display object such as an image or a character.
  • the display device 160 can be, for example, a touch device such as an LCD display.
  • the input unit 120 can be integrated with the display device 160 to implement a touch display function, but is not limited thereto.
  • the memory 140 can be a solid state memory such as a read only memory (ROM), a random access memory (RAM), a SIM card, or the like. It is also possible to store a memory that can be selectively erased and provided with more data even when the power is turned off, and an example of the memory is sometimes referred to as an EPROM or the like. Memory 140 can also be some other type of device. Memory 140 includes a buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application/function storage section 142 for storing an application and a function program or a flow for executing an operation of the electronic device 600 by the central processing unit 100.
  • ROM read only memory
  • RAM random access memory
  • SIM card or the like. It is also possible to store a memory that can be selectively erased and provided with more data even when the power is turned off, and an example of the memory is sometimes referred to as an EPROM or the like. Memory 140 can also be some other type of device. Memory 140 includes a buffer memory 141 (sometimes referred to as
  • the memory 140 may also include a data storage portion 143 for storing data such as contacts, digital data, pictures, sounds, and/or any other data used by the electronic device.
  • the driver storage portion 144 of the memory 140 may include various drivers for the communication function of the electronic device and/or for performing other functions of the electronic device such as a messaging application, an address book application, and the like.
  • the communication module 110 is a transmitter/receiver 110 that transmits and receives signals via the antenna 111.
  • a communication module (transmitter/receiver) 110 is coupled to the central processing unit 100 to provide an input signal and receive an output signal, which may be the same as in the case of a conventional mobile communication terminal.
  • a plurality of communication modules 110 such as a cellular network module, a Bluetooth module, and/or a wireless local area network module, may be provided in the same electronic device.
  • the communication module (transmitter/receiver) 110 also issues a designated signal after obtaining a corresponding command via the central processing unit 100, thereby implementing a general telecommunication function.
  • Piezoelectric sensor 130 can include any suitable piezoelectric sensing element, such as a thin film piezoelectric sensor or the like.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Abstract

La présente invention concerne un appareil et un procédé de détection de force dynamique ou quasi-dynamique, ledit appareil comprenant spécifiquement une plaque de base, un module de détection piézoélectrique et un module d'analyse de signal. La plaque de base est utilisée pour produire un signal d'onde élastique selon un toucher. Le module de détection piézoélectrique est raccordé à la plaque de base, et est utilisé pour convertir le signal d'onde élastique en un signal de tension. Le module d'analyse de signal est raccordé au module de détection piézoélectrique, et est utilisé pour calculer, en fonction du signal de tension, une valeur de changement de fluctuation du signal de tension et calculer, en fonction de la valeur de changement de fluctuation, des informations de force produites par le toucher. L'appareil et le procédé de détection de force dynamique ou quasi-dynamique fournissent des informations de force tridimensionnelle valides, présentent une structure simple, ont une large applicabilité, et peuvent être utilisés dans des domaines tels que les claviers virtuels, l'électronique automobile, les maisons intelligentes, les robots et l'aérospatiale.
PCT/CN2019/081570 2018-02-09 2019-04-04 Appareil et procédé de détection de force dynamique ou quasi-dynamique WO2019154442A1 (fr)

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