CN207995331U - A kind of earphone intelligent controlling device based on MEMS pressure sensor - Google Patents
A kind of earphone intelligent controlling device based on MEMS pressure sensor Download PDFInfo
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- CN207995331U CN207995331U CN201820048488.9U CN201820048488U CN207995331U CN 207995331 U CN207995331 U CN 207995331U CN 201820048488 U CN201820048488 U CN 201820048488U CN 207995331 U CN207995331 U CN 207995331U
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- earphone
- pressure sensor
- signal
- mems pressure
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Abstract
The utility model is related to a kind of earphone intelligent controlling device based on MEMS pressure sensor,By being provided with MEMS pressure sensor in the headset earpiece connected by elastic hanger,When earphone is worn on the head,Headset earpiece is opened so that elastic deformation occurs for hanger,Or Manual press headset earpiece,To form pressure on the contact surface of headset earpiece,Cause the resistance strain gage in MEMS pressure sensor that elastic deformation occurs,MEMS pressure sensor stress obtains the signal of one and pressure correlation,Being improved through operational amplifier and after being amplified,It is sent into peak detector and carries out detection,Signal after detection send after analog-digital converter is converted and carries out data processing in microcontroller,And then judge the current use state of earphone,And export a pulse signal,The switch module of playback equipment connects the receipts pulse signal and realizes automatic switch control,By power variation can controlling transmission signal variation,It is controlled hence for the use state of earphone,It has been effectively saved power consumption.
Description
Technical field
The utility model is related to earphone intelligent controlling devices, and in particular to a kind of earphone intelligence based on MEMS pressure sensor
It can control device.
Background technology
Earphone is the widely used personal voice playback equipment in audio-visual devices and communication apparatus, and sound source signal is converted
It is answered for user at sound.Headphone is made up of the ear-shield type receiver by hanger and two built-in audible devices, two
Earmuff covers on auricle, and sound is passed to duct, and earmuff can also completely cut off external noise, get better sound effect.
But when viewing either listens to music sometimes due to burst or fortuitous event, user have to immediately take ear
Machine has little time to close player and turn to other work, but player continues to play at this time, when waiting again back, often
A part of plot is missed, while player also produces unnecessary energy consumption, if the pendant of earphone can be detected effectively
State is worn, when earphone falls off, player, that is, automatic pause continues last time broadcasting when earphone takes again, will be effective
Improvement this occurrence of.
In addition, current earphone switches song to realize to earphone, using the setting of the functions such as single two-channel, often in ear
It is provided with multiple buttons on machine, causes unnecessary redundant Design, if user can be pressed by the long-press to receiver, company
The switching for realizing above-mentioned function can greatly improve the service efficiency of component, reduces redundant component, the use of user is greatly improved
Experience.
Utility model content
In view of this, the utility model discloses a kind of earphone intelligent controlling device based on MEMS pressure sensor,
Whether can be worn by test earphone, carry out the switch of intelligent control earphone.
First aspect：
The utility model discloses a kind of earphone intelligent controlling device based on MEMS pressure sensor, the control device packet
It includes：
One MEMS pressure sensor is used for the pressure change on test earphone receiver surface, and then exports one and pressure phase
The signal of pass；
One operational amplifier, for being improved and being amplified the above-mentioned signal with pressure correlation；
One peak detector obtains more stable direct current signal for carrying out detection to signal；
One analog-digital converter is converted to digital signal for flowing signal；And
One microcontroller for handling data, and then judges the current use state of earphone and exports an arteries and veins
Signal is rushed, the switch module of playback equipment receives the pulse signal and realizes automatic switch control.
Further, the MEMS pressure sensor is placed on the earmuff of headset earpiece, and the MEMS pressure sensors are
Silicon piezoresistance type pressure sensor.
Further, high-accuracy semiconductor resistor there are four being set in the MEMS pressure sensor, the resistance elasticity shape
The direction of change is consistent with the direction of earmuff stress and deformation, is used for the pressure that test earphone receiver is generated with user's head contact,
To destroy the balance of original resistance bridge in MEMS pressure sensor, the alternating current that electric bridge output amplitude is directly proportional to the pressure
Press signal.
Further, the signal exported after the peak detector detection after analog-digital converter is converted into digital signal V,
Threshold value REF1 and threshold value REF2 are set in the microcontroller, threshold value REF1 and threshold value REF2 are used for and microcontroller receives
Digital signal V make comparisons to judge the use state that earphone is current.
Further, work as REF1<V<When REF2, the GPIO pin of the microcontroller will export a rising edge signal
To playback equipment, control playback equipment is in broadcast state；
Work as V<When REF1, the GPIO pin of the microcontroller will export a failing edge signal to playback equipment, control
Playback equipment processed is placed in a suspend state；
Work as V>When REF2, the GPIO pin of the microcontroller sends instructions to playback equipment, and control playback equipment enters
Coomand mode.
Further, when the playback equipment enters coomand mode, user applies two in unit interval T1 to earphone
Secondary pressure is then double click operation, is otherwise invalid operation；User persistently exports high level in unit interval T2, then is length
By operation, second processing state is switched to from the first current processing state to control earphone.
Further, the first processing state is different with second processing state, and the first processing state and second processing
State is the one of which in F.F., pause, last track, next track and track selecting.
Further, a hanger is connected between the headset earpiece, the hanger is made of elastic material, when in normal
When state, the interval of a very little is formed between headset earpiece, when earphone is worn on the head, the headset earpiece at both ends is opened so that hanging
Elastic deformation occurs for frame, and then forms pressure on the contact surface of headset earpiece, cause the earmuff stress and deformation of headset earpiece and
Obtain pressure signal.
Second aspect：
The invention also discloses an operation circuits, and the operation circuit includes MEMS pressure sensor, the MEMS
The ends OUT+ and the ends OUT- of pressure sensor are connected on IN+ the and IN- input terminals of operational amplifier respectively, the operational amplifier
Output end connects peak detector input terminal, and peak detector output end connects an analog-digital converter input terminal, analog-digital converter
Output end connect microcontroller input, microcontroller output is connected with playback equipment.
The advantageous effect that technical solution provided by the utility model is brought is：Headset earpiece is received when user wears and is given to
The pressure of MEMS pressure sensor, by power variation can controlling transmission signal variation, hence for the use of earphone
State is controlled, and to eliminate the button of redundancy, and can be closed when earphone is not in wearing state, is effectively saved in time
Power consumption is saved.
Description of the drawings
Fig. 1 is the schematic block circuit diagram of embodiment one.
In figure：
1, MEMS pressure sensor 2, operational amplifier 3, peak detector 4, analog-digital converter 5, microcontroller
Device 6, playback equipment.
Specific implementation mode
It is new to this practicality below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is further described.
Embodiment one
Referring to FIG. 1, the embodiments of the present invention provide a kind of intelligently control of the earphone based on MEMS pressure sensor
Device processed, including a MEMS pressure sensor 1, the MEMS pressure sensor 1 is by whether receive earphone and user's head
The pressure generated between portion, and fallen off state or wearing state with this to judge that current earphone is in, MEMS pressure sensor 1
The pressure signal is acquired, after the amplification of operational amplifier 2 and 3 detection of peak detector, is obtained more smoothly straight
Flow signal, after direct current signal is converted into digital signal V by analog-digital converter 4, finally enter in microcontroller 5 with wherein
The threshold value of setting is compared, and final output controls signal to control playback equipment 6.
Earphone uses headphone in the present embodiment, includes the extension for connecting headphone both ends headset earpiece
Frame, the hanger are made of elastic material, and MEMS pressure sensor 1, the MEMS pressure are provided in the headset earpiece
Sensor 1 can detect the pressure on headset earpiece surface to obtain one and the ac voltage signal of pressure correlation, this reality
The MEMS pressure sensor 1 applied in example is silicon piezoresistance type pressure sensor, using four high-accuracy semiconductor resistor foil gauge groups
At resistance bridge measuring circuit, the direction one in the resistance elastically-deformable direction and earmuff stress and deformation are converted as power electricity
It causes, for the pressure that test earphone receiver is generated with user's head contact, when earphone is worn on the head, the headset earpiece at both ends
It opens so that elastic deformation occurs for hanger, and then forms pressure on the contact surface of headset earpiece, it can also connecing in headset earpiece
Contacting surface hand presses to form pressure, causes four in MEMS pressure sensor 1 high-accuracy semiconductor resistor foil gauge hairs
Raw elastic deformation, destroys the balance of original resistance bridge, the ac voltage signal that electric bridge output amplitude is directly proportional to the pressure,
An end burning voltage VE, IN- is inputted at the ends IN+ of MEMS pressure sensor 1 to be grounded, and when user wears earphone, is generated
Elastic shape occurs for four high-accuracy semiconductor resistor foil gauges in the pressure of contact surface can cause MEMS pressure sensors 1
Become, original resistance bridge balance is destroyed, to export the alternating voltage directly proportional to amplitude pressure at the ends OUT+ and OUT-
Signal；
The ends OUT+ and OUT- of MEMS pressure sensor 1 are connected on IN+ the and IN- input terminals of operational amplifier 2 respectively, utilize
CA3140 can be used as operation amplifier in the present embodiment in the characteristics of 2 high cmrr of operational amplifier and high input impedance
Device 2 is improved and is amplified to the voltage signal of output with this；
Signal after being improved and being amplified through operational amplifier 2 is sent into peak detector 3 and carries out detection, will exchange
Signal is converted to the direct current signal directly proportional to AC signal amplitude, and the size of the direct current signal reflects presses on contact surface
The size of power, the pressure formed on contact surface is bigger, then the voltage value of the direct current signal is bigger；The voltage value formed on contact surface
Smaller, then the voltage value of the direct current signal is also small；
The direct current signal is converted to digital signal V by analog-digital converter 4, it is possible thereby to realize signal during transmission
Jamproof ability is stronger, isolates noise therein, ensures the reliability of communication；
Subsequent digital signal V send to microcontroller 5 is interior and carries out data processing, and threshold value is set in the microcontroller 5
REF1 and threshold value REF2, subsequent digital signal V make comparisons in microcontroller 5 with threshold value REF1, REF2, judge that earphone is worked as
Preceding use state：
Work as REF1<V<When REF2, detecting circuit output digit signals V is more than threshold value REF1, is determined as that earphone is in and wears
State, at this time the GPIO pin of microcontroller 5 will export a rising edge signal to playback equipment 6, opening in playback equipment 6
It closes module to receive the rising edge signal and open, controls playback equipment 6 at this time and be in broadcast state；
Work as V<When REF1, detecting circuit exports DC voltage V and is less than threshold value REF1, is determined as that earphone is in and falls off or take
Lower state, at this time the GPIO pin of microcontroller 5 will export a failing edge signal to playback equipment 6, in playback equipment 6
Switch module receives the failing edge signal and closes, and control playback equipment 6 suspends currently playing；
Work as V>When REF2, detecting circuit exports DC voltage and is more than threshold value REF2, is determined as that earphone is in coomand mode, will
Playback equipment 6 is sent instructions to first, and playback equipment 6 is made to enter order wait state.Under the state, each pair of earphone of user is applied
Add a pressure, microcontroller 5 will will produce a rising edge signal, and playback equipment 6 to rising edge signal count or right
High level lasting time measures, and when generating 2 rising edge signals in unit interval T1, that is, is judged as double-clicking, otherwise for
Invalid signals；When high level lasting time be more than T2, that is, be judged as long-press, to control earphone by the first current processing state
Switch to corresponding second processing state.
Earphone is clicked again when usually user wears earphone, listens cylinder ear when wearing earphone to the pressure ratio that earphone applies
The pressure generated between cover and user head is big, enters coomand mode to allow digital signal V more than REF2, but herein not
Limitation send order scene, i.e., no matter with or take off, as long as to earphone apply pressure meet the requirements, can all send life
It enables and enters coomand mode.
Particularly, the time of T1 and T2 is two independent amounts, and conditional relationship is not present, is according to work in actual production
Journey actual set.
For example, setting the T1 times as 2s, that is, the time of rising edge signal output twice is generated in 2s, then is judged as double
Operation is hit, the time for generating rising edge signal output twice is then invalid operation outside 2s；The T2 times are set as 5s, i.e., high electricity
It is flat when being sustained for longer than 5s, then it is judged as long press operation, to which the first current processing state of earphone is switched to second
Processing state.
The first processing state and second processing state refer to command function or the working condition of earphone simultaneously, such as F.F., temporarily
Stop, last track, next track and track selecting etc., manufacturer or user can freely set work(according to the use habit of itself
It can state.
In present embodiment, which includes an operation circuit, and the operation circuit includes MEMS pressure sensings
Device 1, the ends OUT+ and the ends OUT- of the MEMS pressure sensor 1 are connected on IN+ the and IN- input terminals of operational amplifier 2, institute respectively
Output end connection 3 input terminal of peak detector of operational amplifier 2 is stated, it is defeated that 3 output end of peak detector connects analog-digital converter 4
Enter end, the output end of analog-digital converter 4 connects 5 input terminal of microcontroller, and 5 output end of microcontroller is connected with playback equipment 6.
Specific embodiment described in the utility model is only to be given an example to the spirit of the present invention.This practicality
Novel person of ordinary skill in the field can make various modifications or additions to the described embodiments or adopt
It is substituted with similar mode, but without departing from the spirit of the present application or surmounts model defined in the appended claims
It encloses.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.The above institute
The preferred embodiment for stating only the utility model, is not intended to limit the utility model, all spirit and original in the utility model
Within then, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of earphone intelligent controlling device based on MEMS pressure sensor, which is characterized in that the control device includes：
One MEMS pressure sensor is used for the pressure change on test earphone receiver surface, and then exports one and pressure correlation
Signal；
One operational amplifier, for being improved and being amplified the above-mentioned signal with pressure correlation；
One peak detector obtains more stable direct current signal for carrying out detection to signal；
One analog-digital converter is converted to digital signal for flowing signal；And
One microcontroller for handling data, and then judges the current use state of earphone and exports a pulse letter
Number, the switch module of playback equipment receives the pulse signal and realizes automatic switch control.
2. the earphone intelligent controlling device based on MEMS pressure sensor as described in claim 1, it is characterised in that：The MEMS
Pressure sensor is placed on the earmuff of headset earpiece, and the MEMS pressure sensor is silicon piezoresistance type pressure sensor.
3. the earphone intelligent controlling device based on MEMS pressure sensor as claimed in claim 2, it is characterised in that：The MEMS
High-accuracy semiconductor resistor there are four being set in pressure sensor, the side in the resistance elastically-deformable direction and earmuff stress and deformation
It is former in MEMS pressure sensor to destroy for the pressure that test earphone receiver is generated with user's head contact to consistent
The balance of first resistance bridge, the ac voltage signal that electric bridge output amplitude is directly proportional to the pressure.
4. the earphone intelligent controlling device based on MEMS pressure sensor as described in claim 1, it is characterised in that：The peak value
The signal exported after detector, into digital signal V, threshold value is set in the microcontroller after analog-digital converter is converted
REF1 and threshold value REF2, threshold value REF1 and the digital signal V that threshold value REF2 is used for and microcontroller receives make comparisons to judge
The current use state of earphone.
5. the earphone intelligent controlling device based on MEMS pressure sensor as claimed in claim 4, it is characterised in that：Work as REF1<V
<When REF2, the GPIO pin of the microcontroller will export a rising edge signal to playback equipment, control at playback equipment
In broadcast state；
Work as V<When REF1, the GPIO pin of the microcontroller will export a failing edge signal to playback equipment, and control is broadcast
Put equipment placed in a suspend state；
Work as V>When REF2, the GPIO pin of the microcontroller sends instructions to playback equipment, and control playback equipment enters order
State.
6. the earphone intelligent controlling device based on MEMS pressure sensor as claimed in claim 5, it is characterised in that：The broadcasting
When equipment enters coomand mode, user applies pressure twice in unit interval T1 to earphone, then is double click operation, otherwise for
Invalid operation；User persistently exports high level in unit interval T2, then is long press operation, to control earphone from current
First processing state switches to second processing state.
7. the earphone intelligent controlling device based on MEMS pressure sensor as claimed in claim 6, it is characterised in that：Described first
Processing state and second processing state are different, and the first processing state and second processing state be F.F., pause, last track, under
The one bent one of which in track selecting.
8. the earphone intelligent controlling device based on MEMS pressure sensor as described in claim 1, it is characterised in that：The earphone
A hanger is connected between receiver, the hanger is made of elastic material, and when in normal condition, one is formed between headset earpiece
The interval of very little, when earphone is worn on the head, the headset earpiece at both ends, which is opened, makes hanger that elastic deformation occur, and then in earphone
Pressure is formed on the contact surface of receiver, causes the earmuff stress and deformation of headset earpiece and obtains pressure signal.
9. the earphone intelligent controlling device based on MEMS pressure sensor as described in claim 1, it is characterised in that：The control fills
Set including one operation circuit, the operation circuit includes MEMS pressure sensor, the ends OUT+ of the MEMS pressure sensor with
The ends OUT- are connected on IN+ the and IN- input terminals of operational amplifier respectively, and the output end of the operational amplifier connects peak detector
Input terminal, peak detector output end connect an analog-digital converter input terminal, and the output end of analog-digital converter connects microcontroller
Input terminal, microcontroller output are connected with playback equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820048488.9U CN207995331U (en) | 2018-01-11 | 2018-01-11 | A kind of earphone intelligent controlling device based on MEMS pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820048488.9U CN207995331U (en) | 2018-01-11 | 2018-01-11 | A kind of earphone intelligent controlling device based on MEMS pressure sensor |
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| Publication Number | Publication Date |
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| CN207995331U true CN207995331U (en) | 2018-10-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108174319A (en) * | 2018-01-11 | 2018-06-15 | 中国地质大学（武汉） | A kind of earphone intelligent controlling device based on MEMS pressure sensor |
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2018
- 2018-01-11 CN CN201820048488.9U patent/CN207995331U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108174319A (en) * | 2018-01-11 | 2018-06-15 | 中国地质大学（武汉） | A kind of earphone intelligent controlling device based on MEMS pressure sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181019 Termination date: 20190111 |