CN107300997B - Frame pressure touch device of mobile terminal and touch identification method - Google Patents
Frame pressure touch device of mobile terminal and touch identification method Download PDFInfo
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- 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
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- G—PHYSICS
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- 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
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Abstract
The invention discloses a frame pressure touch device of a mobile terminal and a touch identification method, wherein the touch device comprises a touch panel, a pressure sensor, a pressure amplifier, a bearing plate and a main control CPU; the touch panel is provided with a pressure panel, and the pressure sensor is arranged on the bearing plate and used for detecting the pressing strength of a user during touch and providing a pressure signal for the main control CPU; the pressure amplifier is connected to the pressure sensor, and the bearing plate is used for bearing pressure deformation pressure of the pressure panel and providing hardware support for the pressure amplifier; the main control CPU is a processing core of the pressure signal and is electrically connected with the pressure sensor. The invention replaces the traditional mechanical key by pressure induction identification, prolongs the service life of the key function of the terminal equipment and has the waterproof and dustproof effects; meanwhile, the coordinates of the pressing position of the user can be calculated by utilizing the multi-node pressure sensor, and the user control experience is enriched.
Description
Technical Field
The invention belongs to the technical field of touch control, and particularly relates to a pressure touch control device and an identification method of a mobile terminal.
Background
At present, mechanical keys such as a power key and a volume key are usually placed on a frame of a mobile terminal, so that a user can conveniently and quickly operate the mobile terminal. The mechanical key has the characteristics of easy abrasion, no water and dust prevention and single function, and is difficult to meet the increasingly improved experience requirements of users.
Patent application 201610712660.1 discloses a method and apparatus for automatic calibration of a sensor, the method comprising: acquiring horizontal information of a calibration platform, acquiring adjustment information for adjusting the calibration platform according to the horizontal information, and adjusting the calibration platform according to the adjustment information. The beneficial effect of this disclosure does: the sensor of the mobile terminal is close to the horizontal state to the maximum extent by acquiring the horizontal information and the adjustment information of the calibration platform, and the calibration value is written into the sensor through the sensor calibration program in the horizontal state, so that the large error possibly caused by manual calibration is avoided, and the deviation and the reject ratio of the sensor calibration are reduced to the maximum extent on the production line of the mobile terminal. However, although the patent application performs calibration through the calibration platform, the technical solution is that the input control of the calibration program is completed through horizontal setting, and the problem of mechanical keys cannot be solved.
Disclosure of Invention
Based on this, the primary objective of the present invention is to provide a frame pressure touch device and a touch recognition method for a mobile terminal, where the device and the method analyze the operation intention of a user by detecting the operation force of the user on an operation panel, and through cooperation with vibration feedback of a linear motor, the device and the method can well restore the hand feeling and effect of the user using a mechanical button, and can well solve the above problems of the mechanical button.
Another object of the present invention is to provide a frame pressure touch device and a touch recognition method for a mobile terminal, which improve the service life of the key function of the terminal device, and achieve the waterproof and dustproof effects without opening holes and slots; meanwhile, the coordinates of the pressing position of the user can be calculated by utilizing the multi-node pressure sensor, and the user control experience is enriched.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a frame pressure touch device of a mobile terminal comprises a touch panel, a pressure sensor, a pressure amplifier, a bearing plate and a main control CPU; wherein the content of the first and second substances,
the touch panel is provided with a pressure panel to generate pressure deformation under the action of pressure;
the pressure sensor is arranged on the bearing plate and used for detecting the pressing pressure during touch control of a user and providing a pressure signal for the main control CPU;
the pressure amplifier is connected with the pressure sensor and used for amplifying a pressure change signal of the pressure sensor and improving the identification precision of a pressure area;
the bearing plate is used for bearing the pressure deformation pressure of the pressure panel and providing hardware support for the pressure amplifier;
the main control CPU is a processing core of the pressure signal and is electrically connected with the pressure sensor.
The pressure sensor comprises a plurality of pressure sensing nodes to accurately sense pressure change, the number of the nodes is related to the touch length of the mobile terminal, and the pressure sensor is tightly attached to the touch panel through viscose glue.
Furthermore, the pressure amplifier is made of soft foam materials and is respectively placed below the pressure sensing nodes, and the thickness of the soft foam materials is larger than the width of a gap between the pressure sensor and the bearing plate. When the user pressed touch panel, the foam produced certain deformation, and this deformation dynamics feedback can promote pressure sensor's pressure variation to pressure sensor.
A pressure touch control identification method of a mobile terminal is characterized by comprising the following steps:
101. setting a set of parameters: smoothing coefficient, trigger threshold, pressure threshold, sampling frequency;
wherein the smoothing coefficient is a value between 0 and 1;
the trigger threshold and the pressure threshold can be independently set for different nodes; and setting a cache region for storing historical data of the pressure values of all the pressure nodes.
102. After the main control CPU works normally, acquiring the pressure value of each pressure sensing node in the pressure sensor at a set sampling frequency;
103. setting a cache area and storing data of each pressure node;
the buffer area stores each pressure node data of 32 frames, the buffer area is provided with a plurality of buffer arrays for storing the pressure node data of each frame, and each buffer array correspondingly stores the pressure node data of one frame; if the cache array A stores the node 1 pressure value, the cache array B stores the node 2 pressure value, and so on.
104. Signal preprocessing: each time a new pressure value is obtained, noise reduction processing is required; the processing method comprises the following steps: the current pressure value is the current pressure value plus the last pressure value (1-smoothing coefficient);
the larger the smoothing coefficient setting is, the smaller the signal noise is, but the variation sensitivity is reduced, typically set to 0.7;
after the pressure value of this time is obtained after calculation, the pressure values in the array are integrally moved backwards, the last pressure value is removed, and the latest pressure value is filled.
105. Calculating differential data of the pressure, wherein the differential data calculation method comprises the following steps: the difference data is the pressure value of the current time-the last time;
106. judging whether pressure touch exists or not, calculating difference data of each node, marking a touch event 1 when the difference data obtained by a certain node is larger than a trigger threshold, sequentially inquiring n values when X [ n +1] is larger than X [ n ] in the node array (namely finding the lowest point of a pressure rising trend), calculating the pressure value accumulation SUM SUM from X [0] to X [ n ], and marking a touch event 2 if the pressure value accumulation SUM SUM is larger than the pressure threshold;
if the touch event 2 occurs, the corresponding node area is considered to be pressed, and the main control CPU performs corresponding processing; touch event 2 is not sent, then the master CPU does not need to process.
Another method comprises the steps of:
201. setting a set of parameters: pressure threshold, time threshold, proportion threshold, sampling frequency;
202. after the main control CPU works normally, acquiring the pressure value of each pressure sensing node in the pressure sensor at a set sampling frequency;
203. signal preprocessing: each time a new pressure value is obtained, noise reduction processing is required; the processing method comprises the following steps: the current pressure value is the current pressure value plus the last pressure value (1-smoothing coefficient); the smoothing coefficient is a value between 0 and 1;
the larger the smoothing coefficient setting is, the smaller the signal noise is, but the variation sensitivity is reduced, typically set to 0.7;
204. sequentially judging whether each pressure value is greater than a pressure threshold value;
205. if no pressure value is greater than the pressure threshold value, continuously acquiring a new pressure value according to the sampling frequency;
206. if the pressure value is greater than the pressure threshold value, the pressure node is taken as the center, the current touch area coordinate is calculated by combining the pressure change values of the upper node and the lower node through the moment relation, the main control CPU carries out corresponding judgment through the touch area coordinate, and corresponding instructions are executed according to pressure information.
For the touch of the node which is larger than the pressure threshold, extracting the pressure data of the node and the upper and lower nodes of the node, and calculating the pressure coordinate through the moment relation; and the number of the nodes in the touch edge area needs to be increased by 2 more than the number of the original pressure nodes, and the nodes are respectively placed on the upper side and the lower side of the pressure sensor to solve the problem that the touch area without the sensing nodes outside the nodes in the original touch edge area cannot be calculated.
According to the frame pressure touch device and the touch identification method of the mobile terminal, the traditional mechanical keys are replaced by pressure sensing identification, the service life of the key function of the terminal equipment is prolonged, and the waterproof and dustproof effects are achieved by the arrangement of the pressure sensors and the back of the touch panel without opening and slotting; meanwhile, the coordinates of the pressing position of the user can be calculated by utilizing the multi-node pressure sensor, and the user control experience is enriched.
Drawings
Fig. 1 is a schematic structural diagram of a touch device implemented in the present invention.
Fig. 2 is a schematic structural diagram of a touch device disposed on one side of a mobile terminal according to an embodiment of the present invention.
Fig. 3 is a flow chart of an implementation of the present invention.
Fig. 4 is a schematic structural diagram of a touch device implemented by the present invention disposed on two sides of a mobile terminal.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the frame pressure touch device of the mobile terminal includes a touch panel 101, a pressure sensor 102, a pressure amplifier 103, a carrier plate 104, and a main control CPU 105.
The touch panel 101 belongs to an appearance panel of the terminal device, and a user directly performs a touch operation on the touch panel.
The pressure sensor 102 is used for detecting the magnitude of the pressing force when a user touches the touch screen and providing a pressure signal to the main control CPU; and the pressure sensor comprises a plurality of pressure sensing nodes.
The pressure amplifier 103 is used for amplifying a pressure change signal of the pressure sensor and improving the identification precision of the pressure area.
The carrier plate is used 104 to carry the pressure panel pressure deflection pressure and provide hardware support for the pressure amplifier.
The main control CPU105 is a processing core of the pressure signal, and is electrically connected to the pressure sensor.
Referring to fig. 2, a frame pressure touch device of the mobile terminal is disposed at a side of the mobile terminal, and a pressure sensor 102 is configured to detect a pressing force during touch of a user and provide a pressure signal to a main control CPU of the mobile terminal; and the pressure sensor comprises a plurality of pressure sensing nodes, the number of the nodes is related to the touch length designed by the terminal, and the pressure sensor is tightly attached to the touch panel through viscose glue.
The pressure amplifier 103 is made of soft foam and is respectively arranged below the pressure sensing nodes, and the thickness of the foam needs to be slightly larger than the width of a gap between the pressure sensor and the bearing plate because the soft foam needs to be in close contact with the bearing plate and the pressure sensor. When the user pressed touch panel, the foam produced certain deformation, and this deformation dynamics feedback can promote pressure sensor's pressure variation to pressure sensor.
The pressure sensor 103 is used for identifying touch and sliding operations of a user, and a richer touch identification function is provided for the main control CPU on the basis of a mechanical key clicking function.
As shown in fig. 3, the present invention provides a pressure touch recognition method for a mobile terminal. The pressure touch identification method of the mobile terminal is characterized by comprising two methods, wherein one method comprises the following steps:
101. setting a set of parameters: smoothing coefficient, trigger threshold, pressure threshold, sampling frequency;
wherein the smoothing coefficient is a value between 0 and 1;
the trigger threshold and the pressure threshold can be independently set for different nodes; and setting a cache region for storing historical data of the pressure values of all the pressure nodes.
102. After the main control CPU works normally, acquiring the pressure value of each pressure sensing node in the pressure sensor at a set sampling frequency;
103. setting a cache area and storing data of each pressure node;
the buffer area stores each pressure node data of 32 frames, the buffer area is provided with a plurality of buffer arrays for storing the pressure node data of each frame, and each buffer array correspondingly stores the pressure node data of one frame; if the cache array A stores the node 1 pressure value, the cache array B stores the node 2 pressure value, and so on.
104. Signal preprocessing: each time a new pressure value is obtained, noise reduction processing is required; the processing method comprises the following steps: the current pressure value is the current pressure value plus the last pressure value (1-smoothing coefficient);
the larger the smoothing coefficient setting is, the smaller the signal noise is, but the variation sensitivity is reduced, typically set to 0.7;
after the pressure value of this time is obtained after calculation, the pressure values in the array are integrally moved backwards, the last pressure value is removed, and the latest pressure value is filled.
105. Calculating differential data of the pressure, wherein the differential data calculation method comprises the following steps: the difference data is the pressure value of the current time-the last time;
106. judging whether pressure touch exists or not, calculating difference data of each node, marking a touch event 1 when the difference data obtained by a certain node is larger than a trigger threshold, sequentially inquiring n values when X [ n +1] is larger than X [ n ] in the node array (namely finding the lowest point of a pressure rising trend), calculating the pressure value accumulation SUM SUM from X [0] to X [ n ], and marking a touch event 2 if the pressure value accumulation SUM SUM is larger than the pressure threshold;
if the touch event 2 occurs, the corresponding node area is considered to be pressed, and the main control CPU performs corresponding processing; touch event 2 is not sent, then the master CPU does not need to process.
Another method comprises the steps of:
201. setting a set of parameters: pressure threshold, time threshold, proportion threshold, sampling frequency;
202. after the main control CPU works normally, acquiring the pressure value of each pressure sensing node in the pressure sensor at a set sampling frequency;
203. signal preprocessing: each time a new pressure value is obtained, noise reduction processing is required; the processing method comprises the following steps: the current pressure value is the current pressure value plus the last pressure value (1-smoothing coefficient); the smoothing coefficient is a value between 0 and 1;
the larger the smoothing coefficient setting is, the smaller the signal noise is, but the variation sensitivity is reduced, typically set to 0.7;
204. sequentially judging whether each pressure value is greater than a pressure threshold value;
205. if no pressure value is greater than the pressure threshold value, continuously acquiring a new pressure value according to the sampling frequency;
206. if the pressure value is greater than the pressure threshold value, the pressure node is taken as the center, the current touch area coordinate is calculated by combining the pressure change values of the upper node and the lower node through the moment relation, the main control CPU carries out corresponding judgment through the touch area coordinate, and corresponding instructions are executed according to pressure information.
The method is characterized in that the pressure sensor is used for identifying touch and sliding operations of a user, and a richer touch identification function is provided for the main control CPU on the basis of a mechanical key clicking function. The method for calculating the center comprises the following steps:
assuming that the pressure sensor has 5 pressure nodes, the node 3 has a touch greater than the pressure threshold, and the pressure data of the nodes 2, 3, and 4 are extracted as data 2, data 3, and data 4, and at this time, the pressure coordinate (2x data 2+3x data 3+4x data 4)/(2+3+4) can be calculated by the moment relationship.
Particularly, for the nodes in the touch edge area, 2 more nodes need to be added to the number of the original pressure nodes, and the nodes are respectively placed on the upper side and the lower side of the pressure sensor to solve the problem that the touch area without the sensing node on the outer side of the original touch edge area node cannot be calculated.
As shown in fig. 4, another embodiment of the present invention is substantially the same as the embodiment shown in fig. 2, except that:
(1) the pressure sensors are distributed on the upper side, the lower side, the left side and the right side of the mobile terminal;
(2) the main control CPU can perform further user control feedback by combining the touch information of the multi-edge sensor on the basis of identifying the single-edge touch by using the method of the embodiment,
if the left side and the right side of the mobile equipment both recognize the pressing, the user can be regarded as tightly holding the equipment, and operations such as voice recognition or screenshot can be triggered;
if the upper side and the lower side of the mobile equipment are recognized to be pressed, the user can be regarded as holding the equipment transversely, and the functions of screen display direction rotation and the like can be triggered;
in a word, the traditional mechanical key is replaced by pressure sensing identification, the service life of the key function of the terminal equipment is prolonged, and the waterproof and dustproof effects are achieved by the arrangement of the pressure sensors and the back of the touch panel without opening holes and grooving; meanwhile, the coordinates of the pressing position of the user can be calculated by utilizing the multi-node pressure sensor, and the user control experience is enriched.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A frame pressure touch device of a mobile terminal is characterized by comprising a touch panel, a pressure sensor, a pressure amplifier, a bearing plate and a main control CPU; wherein the content of the first and second substances,
the touch panel is provided with a pressure panel to generate pressure deformation under the action of pressure;
the pressure sensor is arranged on the bearing plate and used for detecting the pressing pressure during touch control of a user and providing a pressure signal for the main control CPU;
the pressure amplifier is connected with the pressure sensor and used for amplifying a pressure change signal of the pressure sensor and improving the identification precision of a pressure area;
the bearing plate is used for bearing the pressure deformation pressure of the pressure panel and providing hardware support for the pressure amplifier;
the main control CPU is a processing core of the pressure signal and is electrically connected with the pressure sensor; the pressure sensor comprises a plurality of pressure sensing nodes to accurately sense pressure change, the number of the nodes is related to the touch length of the mobile terminal, and the pressure sensor is tightly attached to the touch panel through viscose glue; the pressure amplifier is made of soft foam materials and is respectively placed below the pressure sensing nodes, and the thickness of the soft foam materials is larger than the width of a gap between the pressure sensor and the bearing plate.
2. A pressure touch control identification method of a mobile terminal is characterized by comprising the following steps:
101. setting a set of parameters: smoothing coefficient, trigger threshold, pressure threshold, sampling frequency;
102. after the main control CPU works normally, acquiring the pressure value of each pressure sensing node in the pressure sensor at a set sampling frequency;
103. setting a cache area and storing data of each pressure node;
104. signal preprocessing: each time a new pressure value is obtained, noise reduction processing is required;
105. calculating differential data of the pressure, wherein the differential data calculation method comprises the following steps: the difference data is the pressure value of the current time-the last time;
106. judging whether pressure touch exists or not, calculating difference data of each node, marking a touch event 1 when the difference data obtained by a certain node is larger than a trigger threshold, sequentially inquiring n values when X [ n +1] is larger than X [ n ] in the node array at the moment, calculating pressure value accumulation SUM SUM from X [0] to X [ n ], and marking a touch event 2 if the accumulation SUM SUM is larger than the pressure threshold;
if the touch event 2 occurs, the corresponding node area is considered to be pressed, and the main control CPU performs corresponding processing; touch event 2 is not sent, then the master CPU does not need to process.
3. The pressure touch recognition method of claim 2, wherein in step 101, the smoothing coefficient is a value between 0 and 1; the trigger threshold and the pressure threshold can be set independently for different nodes.
4. The pressure touch recognition method of claim 2, wherein in step 103, a buffer area stores each pressure node data of 32 frames, the buffer area has a plurality of buffer arrays for storing the pressure node data of each frame, and each buffer array stores the pressure node data of one frame correspondingly.
5. The pressure touch recognition method of claim 2, wherein in step 104, the processing method comprises: the current pressure value is the current pressure value plus the last pressure value (1-smoothing coefficient); and setting the smoothing coefficient to be 0.7, after the pressure value of the time is obtained after calculation, integrally moving the pressure values in the array backwards, removing the last pressure value, and filling the latest pressure value.
6. A pressure touch control identification method of a mobile terminal is characterized by comprising the following steps:
201. setting a set of parameters: pressure threshold, time threshold, proportion threshold, sampling frequency;
202. after the main control CPU works normally, acquiring the pressure value of each pressure sensing node in the pressure sensor at a set sampling frequency;
203. signal preprocessing: each time a new pressure value is obtained, noise reduction processing is required;
204. sequentially judging whether each pressure value is greater than a pressure threshold value;
205. if no pressure value is greater than the pressure threshold value, continuously acquiring a new pressure value according to the sampling frequency;
206. if the pressure value is greater than the pressure threshold value, the pressure node is taken as the center, the current touch area coordinate is calculated by combining the pressure change values of the upper node and the lower node through the moment relation, the main control CPU carries out corresponding judgment through the touch area coordinate, and corresponding instructions are executed according to pressure information.
7. The pressure touch recognition method of claim 6, wherein in step 203, the noise reduction processing method comprises: the current pressure value is the current pressure value plus the last pressure value (1-smoothing coefficient); the smoothing factor is set to 0.7.
8. The pressure touch recognition method of claim 6, wherein in step 206, for a touch of a node greater than a pressure threshold, extracting pressure data of the node and two nodes above and below the node, and calculating a pressure coordinate through a moment relationship; and for the nodes in the touch edge area, 2 more nodes are needed to be added to the number of the original pressure nodes and are respectively placed on the upper side and the lower side of the pressure sensor.
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| CN108632427B (en) * | 2018-04-04 | 2021-02-02 | Oppo广东移动通信有限公司 | Electronic device and storage medium |
| CN111176473B (en) * | 2018-11-12 | 2024-05-24 | 北京钛方科技有限责任公司 | Pressing force identification method and system of touch pad |
| WO2020147840A1 (en) | 2019-01-17 | 2020-07-23 | 北京钛方科技有限责任公司 | Touch pad pressure detection method and apparatus, storage medium and computer device |
| CN111443820B (en) * | 2019-01-17 | 2021-09-21 | 北京钛方科技有限责任公司 | Method and system for identifying pressing impulse of touch pad |
| WO2020147834A1 (en) * | 2019-01-18 | 2020-07-23 | 北京钛方科技有限责任公司 | Intelligent device key control method and apparatus, and computer device and storage medium |
| KR20210041785A (en) | 2019-10-08 | 2021-04-16 | 삼성전자주식회사 | Key structure, key input method and electonic device using it |
| CN111685393B (en) * | 2020-05-09 | 2023-08-22 | 芯海科技（深圳）股份有限公司 | Electronic cigarette control method, electronic cigarette control device and electronic cigarette |
| CN112885215B (en) * | 2021-01-19 | 2022-12-02 | 四川大学华西医院 | Simulator based on biodynamics extrathoracic cardiac compression dynamic monitoring |
| CN114168003A (en) * | 2021-11-02 | 2022-03-11 | 北京小米移动软件有限公司 | Touch pad assembly, vibration feedback method, electronic device and storage medium |
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