CN116295979B

CN116295979B - Pressure sensor module for Bluetooth headsets

Info

Publication number: CN116295979B
Application number: CN202310023558.0A
Authority: CN
Inventors: 黄远青
Original assignee: Shenzhen Meisse High Tech Co ltd
Current assignee: Shenzhen Meisse High Tech Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2024-11-19
Anticipated expiration: 2043-01-09
Also published as: CN116295979A

Abstract

The invention relates to a pressure sensor module applied to a Bluetooth headset, which comprises: the pressure sensing circuit comprises a circuit board and a pressure sensor array arranged on the circuit board, the circuit board is electrically connected with the pressure sensor array, the pressure sensor array corresponds to at least two key functional areas, and when any key functional area receives the external pressure effect, the pressure sensor deforms and generates resistance change; the pressure detection device receives the electric signals and synchronizes data to the data processing module; the data processing module is used for filtering effective data and calculating the sum of pressure values of the pressure sensors in each key functional area, and the central control module judges the key functional area under the action of external pressure according to the working state of the pressure sensors in the pressure sensor array, so that the pressure sensor module of the Bluetooth headset feeds back the action of the external pressure more accurately.

Description

Pressure sensor module applied to Bluetooth headset

Technical Field

The invention relates to the technical field of pressure sensing devices, in particular to a pressure sensor module applied to a Bluetooth headset.

Background

With the development of technology, mobile phones, computers, bluetooth headsets and the like are becoming indispensable electronic devices. The pressure sensing device is mostly arranged on the electronic equipment, belongs to an important part of the electronic equipment, and is used for realizing different control functions of the electronic equipment. The conventional pressure sensing devices are generally in various forms, wherein a key type is commonly used, and the key type pressure sensing device of an electronic device generally comprises a pressing key positioned outside a housing of the electronic device and a pressure sensor positioned inside the housing of the electronic device, and the pressing key directly acts on the pressure sensor to trigger the pressure sensing.

Chinese patent publication No. CN211321319U discloses a pressure sensor module and an electronic device, where the pressure sensor module includes a carrier, a circuit layer and a strain sensor, the carrier includes at least two connectors, two adjacent connectors are rotationally connected, the circuit layer is disposed on the carrier and is electrically connected to the pressure detecting device, the strain sensor is disposed on the circuit layer and is electrically connected to the circuit layer, and the strain sensor can deform and produce resistance change when being stressed; the electronic equipment comprises a shell, the pressure sensor module is arranged on the inner surface of the shell, and a key area is arranged on the shell and corresponds to a connecting piece of the pressure sensor module. However, in this technical scheme, at least two connecting pieces rotate to be connected, arrange the circuit layer and strain transducer between two connecting pieces, when external pressure acts on the junction of button functional area, because two button functional areas all detect the pressure effect, regard as wrong signal input, then do not carry out signal processing, lead to the pressure sensor module to external pressure's effect feedback inaccurate.

Disclosure of Invention

Therefore, the invention provides a pressure sensor module applied to a Bluetooth headset, which is used for solving the technical problem that the pressure sensor module of the Bluetooth headset in the prior art feeds back the action of external pressure inaccurately.

In order to achieve the above object, the present invention provides a pressure sensor module applied to a bluetooth headset, comprising at least one layer of pressure sensing circuit, wherein the pressure sensing circuit comprises a circuit board and a pressure sensor array arranged on the circuit board, the circuit board is electrically connected with the pressure sensor array, the pressure sensor array is used for receiving the external pressure effect, the pressure sensor array corresponds to at least two key functional areas, and the pressure sensor array comprises a plurality of pressure sensors;

When any key functional area receives the external pressure effect, the pressure sensor deforms and generates resistance change, and the circuit board converts pressure information into an electric signal;

The pressure detection device is used for receiving the electric signals, determining the position, the pressure value, the pressing time and the pressing times of each pressure sensor and synchronizing data to the data processing module;

the data processing module is used for filtering effective data and calculating the sum of pressure values of the pressure sensors in the functional areas of the keys;

And the central control module judges the key functional area under the action of external pressure according to the working state of the pressure sensor in the pressure sensor array, and judges the key functional area under the action of external pressure as an action key functional area if the sum of the pressure values corresponding to the pressure sensor array corresponding to any key functional area in the key functional area is larger than the sum of the pressure values corresponding to any other key functional area.

Further, the data processing module comprises a filtering unit and a calculating unit, wherein the filtering unit is used for filtering the received actual external pressure value according to a preset effective pressure value range;

The actual external pressure value received by the filtering unit is Fi, if Fi is less than or equal to the minimum value of the effective pressure value range, the filtering unit judges that the actual external pressure value is too small, and the actual external pressure Fi is invalid data and does not participate in the next calculation;

if Fi is larger than or equal to the maximum value of the effective pressure value range, the filtering unit judges that the actual external pressure value is too large, and the actual external pressure Fi is invalid data and does not participate in the next calculation;

If the minimum value of the effective pressure value range is smaller than Fi and smaller than the maximum value of the effective pressure value range, the filtering unit judges that the actual external pressure value is normal, and the filtering unit judges that the actual external pressure Fi is effective data and sends the effective data to the calculating unit so that the calculating unit can perform the next calculation.

Further, the effective pressure value range is determined according to a preset standard pressure value F0 and a pressure value range adjustment coefficient; setting a first pressure value range adjustment coefficient to be alpha 1 in the filtering unit, setting a second pressure value range adjustment coefficient to be alpha 2 in the filtering unit, and setting the minimum value of the effective pressure value range to be fmin=alpha 1×f0 and the maximum value of the effective pressure value range to be fmax=alpha 2×f0;

The first pressure value range adjustment coefficient α1=0.1 and the second pressure value range adjustment coefficient α2=10.

Further, the filtering unit is further configured to filter the received actual duration pressing time according to a preset valid time range;

The actual continuous pressing time value received by the filtering unit is ti, if ti is less than or equal to the minimum value of the effective time range, the filtering unit judges that the actual continuous pressing time is too short, and the actual continuous pressing time ti is invalid data and does not participate in the next calculation;

If ti is more than or equal to the maximum value of the effective time range, the filtering unit judges that the actual continuous pressing time is overlong, and the actual continuous pressing time ti is invalid data and does not participate in the next calculation;

If the minimum value of the effective time range is less than ti and less than the maximum value of the effective time range, the filtering unit judges that the actual continuous pressing time is normal, and the filtering unit judges that the actual continuous pressing time ti is effective data and sends the effective data to the calculating unit so that the calculating unit can perform the next calculation.

Further, the effective time range is determined according to preset standard continuous pressing time t0 and a time range adjustment coefficient; setting a first time range adjustment coefficient to be beta 1 in the filtering unit, setting a second time range adjustment coefficient to be beta 2 in the filtering unit, and setting the minimum value of the effective time range to be tmin=beta 1×t0 and the maximum value of the effective time range to be tmax=beta 2×t0;

The first time range adjustment coefficient β1=0.1 and the second time range adjustment coefficient β2=10.

Further, the calculating unit is used for calculating the sum of the pressure values in the key functional area; the key functional areas comprise a first key functional area, a second key functional area and a third key functional area, and each key functional area is uniformly provided with m rows and n columns of pressure sensors, wherein m and n are integers, m is more than or equal to 1, and n is more than or equal to 1; the pressure value of the pressure sensor of the first key functional area pressure sensor array pressed by the external pressure is marked as FA11, FA12 and … … FAmn, the pressure value of the pressure sensor of the second key functional area pressure sensor array pressed by the external pressure is marked as FB11, FB12 and … … FBmn, the pressure value of the pressure sensor of the third key functional area pressure sensor array pressed by the external pressure is marked as FC11, FC12 and … … FCmn, wherein FAmn indicates that the pressure sensor of the mth row and n position of the first key functional area receives the pressure value pressed by the external pressure, FBmn indicates that the pressure sensor of the mth row and n position of the second key functional area receives the pressure value pressed by the external pressure, and FCmn indicates that the pressure sensor of the mth row and n position of the third key functional area receives the pressure value pressed by the external pressure; the calculating unit calculates that the sum of the external pressure values received by the first key functional area pressure sensor is FA= Σ FAmn, the calculating unit calculates that the sum of the external pressure values received by the second key functional area pressure sensor is FB= Σfbmn, and the calculating unit calculates that the sum of the external pressure values received by the third key functional area pressure sensor is FC= Σ FCmn.

Further, the central control module judges the key function area acted by the external pressure according to the working state of the pressure sensor in the pressure sensor array, when judging that the key function area acted by the external pressure is the acting key function area,

If the sum of the pressure values of the first key functional areas is FA not equal to 0, the sum of the pressure values of the second key functional areas is fb=0, and the sum of the pressure values of the third key functional areas is fc=0, the central control module judges that the first key functional areas are in a working state, the central control module judges that the second key functional areas are not in a working state, the central control module judges that the third key functional areas are not in a working state, the central control module judges that the external pressure acts on the first key functional areas, and the central control module judges that the first key functional areas are acting key functional areas;

If the sum of the pressure values of the first key functional areas is fa=0, the sum of the pressure values of the second key functional areas is FB not equal to 0, and the sum of the pressure values of the third key functional areas is fc=0, the central control module judges that the first key functional areas are not in a working state, the central control module judges that the second key functional areas are in a working state, the central control module judges that the third key functional areas are not in a working state, the central control module judges that the external pressure acts on the second key functional areas, and the central control module judges that the second key functional areas are acting key functional areas;

and if the sum of the pressure values of the first key functional areas is fa=0, the sum of the pressure values of the second key functional areas is fb=0, and the sum of the pressure values of the third key functional areas is FC not equal to 0, the central control module judges that the first key functional areas are not in a working state, the central control module judges that the second key functional areas are not in a working state, the central control module judges that the third key functional areas are in a working state, the central control module judges that the external pressure acts on the third key functional areas, and the central control module judges that the third key functional areas are acting key functional areas.

Further, when the key function area acted by the external pressure is judged to be the acting key function area, if the sum of the pressure values of the first key function area is not equal to 0, the sum of the pressure values of the second key function area is not equal to 0, and the sum of the pressure values of the third key function area is not equal to 0, the central control module judges that the first key function area and the second key function area are both in the working state, and the third key function area is not in the working state, the central control module judges that the external pressure acts on the first key function area and the second key function area at the same time and compares the magnitudes of FA and FB,

When FA > FB, the central control module judges that the first key functional area is an action key functional area;

When fa=fb, the central control module judges that the external pressure is invalid, and the central control module judges that the key function area is not acted;

When FA < FB, the central control module judges that the second key functional area is an action key functional area;

if the sum of the pressure values fa=0 of the first key functional area and the sum of the pressure values FB not equal to 0 of the second key functional area and the sum of the pressure values FC not equal to 0 of the third key functional area, the central control module judges that the second key functional area and the third key functional area are both in a working state and the first key functional area is not in a working state, the central control module judges that the external pressure acts on the second key functional area and the third key functional area simultaneously and compares the magnitudes of FB and FC,

When FB is larger than FC, the central control module judges that the second key functional area is an action key functional area;

When fb=fc, the central control module determines that the external pressure is an invalid press, and the central control module determines that the key function area is not acted;

when FB is smaller than FC, the central control module judges that the third key functional area is an action key functional area;

If the sum of the pressure values of the first key functional area is FA not equal to 0, the sum of the pressure values of the second key functional area is fb=0, and the sum of the pressure values of the third key functional area is FC not equal to 0, the central control module judges that the first key functional area and the third key functional area are both in a working state and the second key functional area is not in a working state, the central control module judges that the external pressure is simultaneously applied to the first key functional area and the third key functional area and compares the sizes of FA and FC,

When FA > FC, the central control module judges that the first key functional area is an action key functional area;

when fa=fc, the central control module judges that the external pressure is invalid pressing, and the central control module judges that the key function area is not acted;

And when FA is smaller than FC, the central control module judges that the third key functional area is an action key functional area.

Further, when the key function area acted by the external pressure is judged to be the acting key function area, when the sum of the pressure values of the first key function area is not equal to 0, the sum of the pressure values of the second key function area is not equal to 0, and the sum of the pressure values of the third key function area is not equal to 0, the central control module judges that the external pressure acts on the first key function area, the second key function area and the third key function area simultaneously and compares the sizes of FA, FB and FC,

When FA > FB and FA > FC, the central control module judges that the first key functional area is an action key functional area;

when FB is larger than FA and FB is larger than FC, the central control module judges that the second key functional area is an action key functional area;

When FC is greater than FA and FC is greater than FB, the central control module judges that the third key function area is an action key function area;

when fa=fb=fc, the central control module determines that the external pressure is an invalid press, and the central control module determines that the key function area is not active.

Further, the central control module judges the control function which can be realized by the action of the external pressure according to the difference of the actual pressing duration and the difference of the actual continuous pressing times of the pressure sensors corresponding to the external pressure in different key function areas and sends a control instruction to the Bluetooth headset;

The central control module determines the received actual continuous pressing times according to the preset standard continuous pressing times;

Setting a first standard continuous pressing frequency as k01 and a second standard continuous pressing frequency as k02 in the central control module, wherein the actual continuous pressing frequency received by the central control module is ki, and the continuous pressing frequency is a time interval delta tk=t (k+1) -tk of two pressing, wherein 0 < delta tk is less than or equal to 1s;

when the actual continuous pressing times ki received by the central control module is an odd number, the central control module judges ki=k01;

When the actual continuous pressing times ki received by the central control module is even, the central control module judges ki=k02;

When the central control module judges that the first key functional area is an action key functional area, the actual continuous pressing time tmin of the first key functional area under external pressure is more than or equal to t0, and the actual continuous pressing times ki are odd times, the central control module judges that the external pressure can realize a first control function and sends a first control instruction to the Bluetooth headset;

When the central control module judges that the second key functional area is an acting key functional area, the actual continuous pressing time tmin of the second key functional area under external pressure is more than or equal to t0, and the actual continuous pressing times ki are odd times, the central control module judges that the external pressure can realize a second control function and sends a second control instruction to the Bluetooth headset;

When the central control module judges that the third key functional area is an action key functional area, the actual continuous pressing time tmin of the third key functional area under external pressure is more than or equal to t0, and the actual continuous pressing times ki are odd times, the central control module judges that the external pressure can realize a third control function and sends a third control instruction to the Bluetooth headset;

when the central control module judges that the first key functional area is an action key functional area, the actual continuous pressing time tmin of the first key functional area under external pressure is more than or equal to t0, and the actual continuous pressing times ki are even numbers, the central control module judges that the external pressure can realize a fourth control function and sends a fourth control instruction to the Bluetooth headset;

When the central control module judges that the second key functional area is an acting key functional area, the actual continuous pressing time tmin of the second key functional area under external pressure is more than or equal to t0, and the actual continuous pressing times ki are even numbers, the central control module judges that the external pressure can realize a fifth control function and sends a fifth control instruction to the Bluetooth headset;

When the central control module judges that the third key functional area is an action key functional area, the actual continuous pressing time tmin of the third key functional area under external pressure is more than or equal to t0, and the actual continuous pressing times ki are even numbers, the central control module judges that the external pressure can realize a sixth control function and sends a sixth control instruction to the Bluetooth headset;

When the central control module judges that the first key functional area is an action key functional area and the actual continuous pressing time t0 of the first key functional area under the external pressure is more than ti and less than or equal to tmax, the central control module judges that the external pressure can realize a seventh control function and sends a seventh control instruction to the Bluetooth headset;

when the central control module judges that the third key functional area is an action key functional area and the actual continuous pressing time t0 of the third key functional area under the external pressure is more than ti and less than or equal to tmax, the central control module judges that the external pressure can realize an eighth control function and sends an eighth control instruction to the Bluetooth headset.

Compared with the prior art, the invention has the beneficial effects that the effective working area range of the pressure sensor module is enlarged by arranging the pressure sensor array in the pressure sensor module; the pressure sensor array is subjected to key function partition design, so that the pressing functions under the action of different external pressures can be clarified, and the different control function requirements of users on the Bluetooth headset are met; the data processing module is used for respectively executing the filtering effective data and calculating the sum of the pressure values, so that the execution process of data processing is defined, and the working efficiency of the data processing is improved; the key function area acted by the external pressure is judged according to the working state of the pressure sensor through the central control module, so that the key function area acted can be rapidly determined; the pressure value sum that pressure sensor array corresponds in the button functional area is further compared through well accuse module, can all receive the button functional area of more accurate judgement effect under the effect of external pressure in a plurality of button functional areas for bluetooth headset's pressure sensor module feeds back more accurately to the effect of external pressure, promotes user experience.

Particularly, the data processing module is respectively provided with the filtering unit and the calculating unit, so that the data processing module can respectively execute the filtering effective data and the sum of calculated pressure values, the execution process of data processing is defined, and the working efficiency of the data processing is improved; meanwhile, the filtering unit and the calculating unit are respectively arranged through the data processing module, so that only one piece of hardware is required to be replaced independently under the condition that one piece of hardware in the filtering unit or the calculating unit is damaged, the error checking efficiency is improved, and the cost is saved; the data processing module filters effective data through the filtering unit, so that the data processing module can synchronize to the central control module with small data quantity and high accuracy, the effectiveness of the data is improved, and the working efficiency of the pressure sensor module is improved; meanwhile, the transmission of data volume is reduced, so that the sensitivity of the pressure sensor module is higher.

Particularly, the press function under the action of different external pressures can be definitely determined by dividing the press key function areas for the pressure sensor array, so that the requirements of users on different control functions of the Bluetooth headset are met; through evenly arranging m row n row pressure sensor at every button functional area, be favorable to well accuse module accurate judgement external pressure at the effective action position of pressure sensor module, promoted the accuracy to effective action region location.

Particularly, the key function area acted by external pressure is judged according to the working state of the pressure sensor through the central control module, so that the key function area can be rapidly determined; the central control module is used for further comparing the sum of the pressure values corresponding to the pressure sensor arrays in the key functional areas, so that the key functional areas with the function of more accurate judgment can be subjected to the action of external pressure in the key functional areas, and the accuracy of the central control module in judging the key functional areas is improved.

In particular, the central control module determines the received actual continuous pressing times according to the preset standard continuous pressing times, so that the reliability of the control function of the Bluetooth headset by the external pressure through the pressure sensor module under different conditions is higher.

In particular, the control function that external pressure effect can be achieved is judged according to the fact that external pressure presses the pressure sensor corresponding to different key function areas according to different external pressure times in different ways, and a control instruction is sent to the Bluetooth headset, so that the multifunctional control of the pressure sensor module to the Bluetooth headset can be achieved, and the diversity and accuracy of the control of the pressure sensor module to the Bluetooth headset are improved.

Drawings

FIG. 1 is a hardware block diagram of a pressure sensor module applied to a Bluetooth headset according to the present invention;

fig. 2 is a front view of a pressure sensor module applied to a bluetooth headset according to the present invention;

FIG. 3 is a side view of a pressure sensor module for a Bluetooth headset according to the present invention;

In the figure: 1. a pressure sensing circuit; 2. a circuit board; 3. a pressure sensor array; 4. a pressure sensor; 5. a pressure detection device; 6. a data processing module; 7. a filtering unit; 8. a calculation unit; 9. a central control module; A. a first key function region; B. a second key function region; C. and a third key function region.

Detailed Description

In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

The pressure sensor module applied to the Bluetooth headset provided by the embodiment of the invention, referring to fig. 1-3, can be implemented as follows:

The pressure sensor module applied to the Bluetooth headset is encapsulated in the injection molding shell, and comprises a layer of pressure sensing circuit, wherein the pressure sensing circuit comprises a circuit board and a pressure sensor array arranged on the circuit board, and the circuit board is electrically connected with the pressure sensor array;

the pressure sensor array is used for receiving the external pressure effect, corresponds to at least two key functional areas and comprises a plurality of pressure sensors;

Specifically, the key functional areas are respectively divided into a first key functional area, a second key functional area and a third key functional area, 4 rows and 2 columns of pressure sensors are uniformly arranged in each key functional area, the first key functional area pressure sensor array is marked as A= (A11, A12, A21, A22, A31, A32, A41 and A42), the second key functional area pressure sensor array is marked as B= (B11, B12, B21, B22, B31, B32, B41 and B42), and the third key functional area pressure sensor array is marked as C= (C11, C12, C21, C22, C31, C32, C41 and C42);

When the random key functional area receives the external pressure effect, the pressure sensor deforms and generates resistance change, and the circuit board converts the pressure information into an electric signal and sends the electric signal to the pressure detection device.

After the pressure detection device receives the electric signals sent by the pressure sensing circuit, the position, the pressure value, the pressing time and the pressing times of the external pressure on each pressure sensor are determined, and the data are synchronized to the data processing module.

The pressure sensor module applied to the Bluetooth headset has the advantages that the pressure sensor module is packaged in the injection-molded shell, so that the waterproof, oil-proof and dust-proof effects of the pressure sensor module applied to the Bluetooth headset are improved; by arranging the pressure sensor array in the pressure sensor module, the effective working area range of the pressure sensor module is enlarged; the press function under the action of different external pressures can be definitely achieved by dividing the press key function areas for the pressure sensor array, and the different control function requirements of users on the Bluetooth headset are met; through evenly arranging the pressure sensor of pressure sensor array and carrying out the dot matrix mark to every pressure sensor, be favorable to well accuse module accurate judgement external pressure in the effective action position of pressure sensor module, promoted the accuracy to effective action region location.

The data processing module is internally provided with a filtering unit and a calculating unit respectively, and after receiving synchronous data of the pressure detection device, the data processing module carries out further effective processing on the data through the filtering unit;

Specifically, the filtering unit filters the received actual ambient pressure value according to a preset effective pressure value range. The actual external pressure value received by the filtering unit is Fi, if Fi is less than or equal to the minimum value of the effective pressure value range, the filtering unit judges that the actual external pressure value is too small, and the actual external pressure Fi is invalid data and does not participate in the next calculation;

Specifically, the effective pressure value range is determined from a standard pressure value F0 and a pressure value range adjustment coefficient set in advance: setting the first pressure value range adjustment coefficient to be α1 in the filter unit and setting the second pressure value range adjustment coefficient to be α2 in the filter unit, the minimum value of the effective pressure value range is fmin=α1×f0, and the maximum value of the effective pressure value range is fmax=α2×f0;

The first pressure value range adjustment coefficient is determined according to a minimum pressure value that can control the bluetooth headset after the pressure sensor module component material receives external pressure, for a light pressing sensor module applied to the bluetooth headset, the minimum force Fzmin that can control the bluetooth headset after the light pressing sensor module is pressed by external pressure is 0.5gf-1gf, the standard pressing force F0 when a user uses the bluetooth headset is usually 5gf-10gf, and then the first pressure value range adjustment coefficient α1= Fzmim/F0, preferably, α1=0.1 or α1=0.2 or α1=0.5;

The second pressure value range adjustment coefficient is determined according to the maximum bearing pressure of the pressure sensor module component material, and for the light pressing sensor module applied to the Bluetooth headset, the maximum bearing pressure Fzmax of the sensor module component material used is 100gf-200gf, and the standard pressing force F0 when the user uses the Bluetooth headset is usually 5gf-10gf, then the second pressure value range adjustment coefficient α2=Fzmax/F0, preferably, α2=10 or α2=20 or α2=40.

Specifically, the filtering unit filters the received actual duration pressing time according to a preset valid time range. The actual continuous pressing time value received by the filtering unit is ti, if ti is less than or equal to the minimum value of the effective time range, the filtering unit judges that the actual continuous pressing time is too short, and the actual continuous pressing time ti is invalid data and does not participate in the next calculation;

If ti is not less than the maximum value of the effective time range, the filtering unit judges that the actual continuous pressing time is overlong, and the actual continuous pressing time ti is invalid data and does not participate in the next calculation;

The effective time range is determined according to preset standard continuous pressing time t0 and a time range adjustment coefficient; setting the first time range adjustment coefficient to be β1 and the second time range adjustment coefficient to be β2 in the filtering unit, wherein the minimum value of the effective time range is tmin=β1×t0, and the maximum value of the effective time range is tmax=β2×t0;

wherein the first time range adjustment coefficient β1=0.1 and the second time range adjustment coefficient β2=10.

The data processing module is respectively provided with the filtering unit and the calculating unit, so that the data processing module can respectively execute the filtering of effective data and the calculation of the sum of pressure values, the execution process of data processing is defined, and the working efficiency of the data processing is improved; meanwhile, the filtering unit and the calculating unit are respectively arranged through the data processing module, so that only one piece of hardware is required to be replaced independently under the condition that one piece of hardware in the filtering unit or the calculating unit is damaged, the error checking efficiency is improved, and the cost is saved; the data processing module filters effective data through the filtering unit, so that the data processing module can synchronize to the central control module with small data quantity and high accuracy, the effectiveness of the data is improved, and the working efficiency of the pressure sensor module is improved; meanwhile, the transmission of data volume is reduced, so that the sensitivity of the pressure sensor module is higher.

Specifically, after the filtering unit of the data processing module receives the data sent by the pressure monitoring device and rejects invalid pressure values to obtain effective pressure values, the calculating unit calculates the sum of the pressure values of the pressure sensors in the functional areas of the keys.

Specifically, the pressure values of the pressure sensors of the first key function area pressure sensor array pressed by the external pressure are denoted as FA11, FA12, FA21, FA22, FA31, FA32, FA41FA42, the pressure values of the pressure sensors of the second key function area pressure sensor array pressed by the external pressure are denoted as FB11, FB12, FB21, FB22, FB31, FB32, FB41, FB42, the pressure values of the pressure sensors of the third key function area pressure sensor array pressed by the external pressure are denoted as FC11, FC12, FC21, FC22, FC31, FC32, FC41, FC42, the sum of the pressure values of the pressure sensors of the first key function area received by the external pressure is calculated as fa=fa11+fa12+fa22+fa31+fa32+41+fa42, the sum of the pressure values of the pressure sensors of the second key function area received by the external pressure sensor is calculated as fa=fa11+fa12+fb 21+fb22+fb 31+fc41+fb 42, and the pressure values of the pressure sensors of the third key function area received by the computing unit are calculated as FC11, FC32, FC41, FC22 and FC 31.

The press function under the action of different external pressures can be definitely achieved by dividing the press key function areas for the pressure sensor array, and the different control function requirements of users on the Bluetooth headset are met; through evenly arranging 4 rows of 2 rows of pressure sensor at every button functional area, be favorable to well accuse module accurate judgement external pressure in the effective action position of pressure sensor module, promoted the accuracy to effective action region location.

The central control module judges a key functional area under the action of external pressure according to the working state of the pressure sensor in the pressure sensor array;

Specifically, when the key function area acted by external pressure is judged to be an acting key function area, if the sum of the pressure values of the first key function area is FA not equal to 0, the sum of the pressure values of the second key function area is fb=0, and the sum of the pressure values of the third key function area is fc=0, the central control module judges that the first key function area is in a working state, the central control module judges that the second key function area is not in a working state, the central control module judges that the third key function area is not in a working state, and the central control module judges that the external pressure acts on the first key function area, the central control module judges that the first key function area is the acting key function area;

If the sum of the pressure values of the first key functional areas is fa=0, the sum of the pressure values of the second key functional areas is fb=0, and the sum of the pressure values of the third key functional areas is FC not equal to 0, the central control module judges that the first key functional areas are not in a working state, the central control module judges that the second key functional areas are not in a working state, the central control module judges that the third key functional areas are in a working state, the central control module judges that the external pressure acts on the third key functional areas, and the central control module judges that the third key functional areas are acting key functional areas.

Specifically, when the key function area acted by the external pressure is judged to be the acting key function area, if the sum of the pressure values FA not equal to 0 of the first key function area and the sum of the pressure values FB not equal to 0 of the second key function area and the sum of the pressure values FC=0 of the third key function area, the central control module judges that the first key function area and the second key function area are both in an operating state and the third key function area is not in an operating state, the central control module judges that the external pressure acts on the first key function area and the second key function area simultaneously and compares the magnitudes of FA and FB,

when fa=fb, the central control module judges that the external pressure is invalid to press, and the central control module judges that the key function area is not acted;

When FA < FB, the central control module judges that the second key function area is an action key function area;

If the sum of the pressure values of the first key functional areas is fa=0, the sum of the pressure values of the second key functional areas is FB not equal to 0, and the sum of the pressure values of the third key functional areas is FC not equal to 0, the central control module judges that the second key functional areas and the third key functional areas are both in working states and the first key functional areas are not in working states, the central control module judges that the external pressure acts on the second key functional areas and the third key functional areas simultaneously and compares the magnitudes of FB and FC,

when fb=fc, the central control module judges that the external pressure is invalid, and the central control module judges that the key function area is not acted;

If the sum of the pressure values of the first key functional area is equal to FA not equal to 0, the sum of the pressure values of the second key functional area is equal to fb=0, and the sum of the pressure values of the third key functional area is equal to FC not equal to 0, the central control module judges that the first key functional area and the third key functional area are both in an operating state and the second key functional area is not in an operating state, the central control module judges that the external pressure acts on the first key functional area and the third key functional area simultaneously and compares the sizes of FA and FC,

When FA > FC, the central control module judges that the first key function area is an action key function area;

when fa=fc, the central control module judges that the external pressure is invalid to press, and the central control module judges that the key function area is not acted;

Specifically, when the key function area acted by the external pressure is judged to be the acting key function area, when the sum of the pressure values FA not equal to 0 of the first key function area and the sum of the pressure values FB not equal to 0 of the second key function area and the sum of the pressure values FC not equal to 0 of the third key function area, the central control module judges that the external pressure acts on the first key function area, the second key function area and the third key function area simultaneously and compares the sizes of FA, FB and FC,

When fa=fb=fc, the central control module determines that the external pressure is an ineffective press, and the central control module determines that the key function area is not acted.

The key function area acted by the external pressure is judged according to the working state of the pressure sensor through the central control module, so that the key function area acted can be rapidly determined; the pressure value sum that pressure sensor array corresponds in the button functional area is further compared through well accuse module, can all receive the button functional area of more accurate judgement effect under the effect of external pressure in a plurality of button functional areas for bluetooth headset's pressure sensor module feeds back more accurately to the effect of external pressure, promotes user experience.

Specifically, after the central control module judges that the effective key function area is finished, the central control module further judges the control function which can be realized by the action of the external pressure according to the difference of the pressing duration and the difference of the continuous pressing times of the external pressure corresponding to different key function areas and sends a control instruction to the Bluetooth headset;

specifically, the central control module determines the received actual continuous pressing times according to the preset standard continuous pressing times;

Setting a first standard continuous pressing frequency as k01 and a second standard continuous pressing frequency as k02 in the central control module, wherein the actual continuous pressing frequency received by the central control module is ki, and the continuous pressing frequency is a time interval delta tk=t (k+1) -tk of two pressing, wherein the delta tk is more than 0 and less than or equal to 1s;

when the actual number of continuous presses ki received by the central control module is even, the central control module determines ki=k02.

The central control module determines the received actual continuous pressing times according to the preset standard continuous pressing times, so that the reliability of the control function of the Bluetooth headset through the pressure sensor module by the external pressure under different conditions is higher.

This embodiment is directed to three button functional areas, combines pressure sensor's position, pressure value, duration and continuous pressing number of times, divides a plurality of functions to this pressure sensor module that is applied to bluetooth headset, and is specific as follows:

When the central control module judges that the first key functional area is an acting key functional area, the actual continuous pressing time of the first key functional area under the external pressure is more than 0.1t0 and less than or equal to t0, and the actual continuous pressing times are 1 time, the central control module judges that the external pressure can realize the 'previous curve' control function and sends a 'previous curve' control instruction to the Bluetooth headset;

When the central control module judges that the second key functional area is an acting key functional area, the actual continuous pressing time of the second key functional area under the external pressure is more than 0.1t0 and less than or equal to t0, and the actual continuous pressing times are 1 time, the central control module judges that the external pressure can realize a pause function and sends a pause control instruction to the Bluetooth headset; when the Bluetooth headset is controlled to be in a ' pause ' state by the pressure sensor module, external pressure acts on the second key functional area again, the actual continuous pressing time of the external pressure on the second key functional area is more than 0.1t0 and less than or equal to t0, and the actual continuous pressing times are 1 time, the central control module judges that the external pressure can realize ' release pause ', continue playing ' function and send ' release pause, continue playing ' control instruction to the Bluetooth headset;

When the central control module judges that the third key functional area is an acting key functional area, the actual continuous pressing time of the third key functional area under the external pressure is more than 0.1t0 and less than or equal to t0, and the actual continuous pressing times are 1 time, the central control module judges that the external pressure can realize the next curve control function and sends a next curve control instruction to the Bluetooth headset;

When the central control module judges that the first key functional area is an acting key functional area, the actual continuous pressing time of the first key functional area under external pressure is more than 0.1t0 and less than or equal to t0, and the actual continuous pressing times are 2 times, the central control module judges that the external pressure can realize a 'slow multiplied by 0.5' control function and sends a 'slow multiplied by 0.5' control instruction to the Bluetooth headset;

When the central control module judges that the second key functional area is an acting key functional area, the actual continuous pressing time of the second key functional area under external pressure is more than 0.1t0 and less than or equal to t0, and the actual continuous pressing times are 2 times, the central control module judges that the external pressure can realize a control function of recovering normal speed and sends a control instruction of recovering normal speed to the Bluetooth headset;

When the central control module judges that the third key functional area is an acting key functional area, the actual continuous pressing time of the third key functional area under the external pressure is more than 0.1t0 and less than or equal to t0, and the actual continuous pressing times are 2 times, the central control module judges that the external pressure can realize a 'quick multiplied by 2' control function and sends a 'quick multiplied by 2' control instruction to the Bluetooth headset;

When the central control module judges that the first key functional area is an acting key functional area and the actual continuous pressing time t0 of the first key functional area under the external pressure is more than ti and less than or equal to 10t0, the central control module judges that the external pressure acts to realize a startup control function and sends a startup control instruction to the Bluetooth headset;

When the central control module judges that the third key functional area is an acting key functional area and the actual continuous pressing time t0 of the third key functional area under the external pressure is more than or equal to 10t0, the central control module judges that the external pressure acts to realize a shutdown control function and sends a shutdown control instruction to the Bluetooth headset.

The pressure sensor module can realize the multifunctional control of the Bluetooth headset according to different pressing duration and different continuous pressing times of the pressure sensor corresponding to different key function areas by the central control module according to the external pressure, and the diversity and accuracy of the control of the Bluetooth headset by the pressure sensor module are improved.

The control function that external pressure effect can be achieved is judged according to the fact that external pressure presses the pressure sensor corresponding to different key function areas according to different external pressure and the fact that the pressing times are different in succession, and a control instruction is sent to the Bluetooth headset, so that the multifunctional control of the pressure sensor module to the Bluetooth headset can be achieved, and the diversity and accuracy of the control of the pressure sensor module to the Bluetooth headset are improved.

Specifically, the pressure sensing circuits in the above embodiments are arranged in a two-layer pressure sensing circuit top-to-bottom stacking arrangement, or one-layer pressure sensing circuit in the above embodiments is arranged in a three-layer or multi-layer pressure sensing circuit top-to-bottom stacking arrangement.

Specifically, two or more key function areas may be divided for the pressure sensor module.

Specifically, the array of pressure sensors on each key functional area is uniformly arranged in any row and any column of pressure sensors.

In particular, an alternative embodiment is to replace the flexible circuit board with a printed circuit board.

Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.

The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Be applied to pressure sensor module on bluetooth headset, its characterized in that includes:

The pressure sensing circuit comprises a circuit board and a pressure sensor array arranged on the circuit board, the circuit board is electrically connected with the pressure sensor array, the pressure sensor array is used for receiving the external pressure effect, the pressure sensor array corresponds to at least two key functional areas, and the pressure sensor array comprises a plurality of pressure sensors;

The central control module judges a key functional area under the action of external pressure according to the working state of the pressure sensor in the pressure sensor array, and judges the key functional area under the action of external pressure as an action key functional area if the sum of pressure values corresponding to the pressure sensor array corresponding to any key functional area in the key functional area is larger than the sum of pressure values corresponding to other random key functional areas;

the central control module judges the key function area acted by the external pressure according to the working state of the pressure sensor in the pressure sensor array, when judging that the key function area acted by the external pressure is the acting key function area,

If the sum of the pressure values of the first key functional area is equal to fa=0, the sum of the pressure values of the second key functional area is equal to fb=0, and the sum of the pressure values of the third key functional area is equal to fc=0, the central control module judges that the first key functional area is in a working state, the central control module judges that the second key functional area is not in a working state, the central control module judges that the third key functional area is not in a working state, the central control module judges that the external pressure acts on the first key functional area, and the central control module judges that the first key functional area is an acting key functional area;

if the sum of the pressure values of the first key functional areas is fa=0, the sum of the pressure values of the second key functional areas is fb=0, and the sum of the pressure values of the third key functional areas is FC not equal to 0, the central control module judges that the first key functional areas are not in a working state, the central control module judges that the second key functional areas are not in a working state, the central control module judges that the third key functional areas are in a working state, the central control module judges that the external pressure acts on the third key functional areas, and the central control module judges that the third key functional areas are acting key functional areas;

When the key function area acted by external pressure is judged to be an acting key function area, if the sum of the pressure values of the first key function area is not equal to 0, the sum of the pressure values of the second key function area is not equal to 0, and the sum of the pressure values of the third key function area is not equal to 0, the central control module judges that the first key function area and the second key function area are both in working states and the third key function area is not in working states, the central control module judges that the external pressure is acted on the first key function area and the second key function area simultaneously and compares the magnitudes of FA and FB,

When FA is smaller than FC, the central control module judges that the third key functional area is an action key functional area;

When the key function area acted by the external pressure is judged to be an acting key function area, when the sum of the pressure values of the first key function area is not equal to 0, the sum of the pressure values of the second key function area is not equal to 0, and the sum of the pressure values of the third key function area is not equal to 0, the central control module judges that the external pressure acts on the first key function area, the second key function area and the third key function area simultaneously and compares the sizes of FA, FB and FC,

When fa=fb=fc, the central control module judges that the external pressure is invalid to press, and the central control module judges that the key function area is not acted;

The central control module judges the control function which can be realized by the action of the external pressure according to the difference of the actual pressing duration time and the difference of the actual continuous pressing times of the pressure sensor corresponding to the external pressure in different key function areas and sends a control instruction to the Bluetooth earphone;

2. The pressure sensor module applied to the Bluetooth headset according to claim 1, wherein the data processing module comprises a filtering unit and a calculating unit, and the filtering unit is used for filtering the received actual external pressure value according to a preset effective pressure value range;

3. The pressure sensor module applied to the bluetooth headset according to claim 2, wherein the effective pressure value range is determined according to a preset standard pressure value F0 and a pressure value range adjustment coefficient, a first pressure value range adjustment coefficient is preset as α1 in the filtering unit, a second pressure value range adjustment coefficient is preset as α2 in the filtering unit, the minimum value of the effective pressure value range is fmin=α1×f0, and the maximum value of the effective pressure value range is fmax=α2×f0;

4. The pressure sensor module according to claim 3, wherein the filtering unit is further configured to filter the received actual duration of the pressing time according to a preset valid time range,

5. The pressure sensor module applied to the bluetooth headset according to claim 4, wherein the effective time range is determined according to a preset standard continuous pressing time t0 and a time range adjustment coefficient, a first time range adjustment coefficient is preset to be beta 1 in the filtering unit, a second time range adjustment coefficient is preset to be beta 2 in the filtering unit, a minimum value of the effective time range is tmin=β1×t0, and a maximum value of the effective time range is tmax=β2×t0;

6. The pressure sensor module applied to the Bluetooth headset according to claim 5, wherein when the computing unit is used for computing the sum of pressure values in the key functional areas, the key functional areas comprise a first key functional area, a second key functional area and a third key functional area, and m rows and n columns of pressure sensors are uniformly arranged in each key functional area, wherein m and n are integers, m is greater than or equal to 1, and n is greater than or equal to 1; the pressure value of the pressure sensor of the first key functional area pressure sensor array pressed by the external pressure is marked as FA11, FA12 and … … FAmn, the pressure value of the pressure sensor of the second key functional area pressure sensor array pressed by the external pressure is marked as FB11, FB12 and … … FBmn, the pressure value of the pressure sensor of the third key functional area pressure sensor array pressed by the external pressure is marked as FC11, FC12 and … … FCmn, wherein FAmn indicates that the pressure sensor of the mth row and n position of the first key functional area receives the pressure value pressed by the external pressure, FBmn indicates that the pressure sensor of the mth row and n position of the second key functional area receives the pressure value pressed by the external pressure, and FCmn indicates that the pressure sensor of the mth row and n position of the third key functional area receives the pressure value pressed by the external pressure; the calculating unit calculates the sum of the external pressure values received by the pressure sensor of the first key functional area as FA= Σ

FAmn, the calculating unit calculates that the sum of the external pressure values received by the second key functional area pressure sensor is fb= Σfbmn, and the calculating unit calculates that the sum of the external pressure values received by the third key functional area pressure sensor is fc= Σ FCmn.