CN110376649A - Wear detection circuit - Google Patents
Wear detection circuit Download PDFInfo
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- CN110376649A CN110376649A CN201910414876.3A CN201910414876A CN110376649A CN 110376649 A CN110376649 A CN 110376649A CN 201910414876 A CN201910414876 A CN 201910414876A CN 110376649 A CN110376649 A CN 110376649A
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- resistance
- detection
- circuit
- wearing
- watchband
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
Abstract
The invention discloses a kind of wearing detection circuits that class product is worn for Wrist intelligent, comprising: wears behavioral value circuit and processing circuit；Wherein, the wearing behavioral value circuit wears the behavior of class product with the presence or absence of the wearing Wrist intelligent for detecting user, and will test signal and be transmitted to the processing circuit；The processing circuit receives the detection signal, and the detection signal is handled and exports to the Wrist intelligent processor for wearing class product.Using the embodiment of the present invention, whether solving the problems, such as that existing Wrist intelligent wearable product can not detect user's wearing.
Description
Technical field
The present invention relates to electronic circuit field more particularly to a kind of wearing detections that class product is worn for Wrist intelligent
Circuit.
Background technique
The current intellectual product for wearing class, including wrist machine, bracelet, wrist-watch are both needed to be worn on wrist when users use
On.But such product generally can not detect whether user is worn in wrist, thus can not adjustment operating mode, such as
Battery saving mode is taken, saves the energy content of battery of wearing class product to the greatest extent.Also it cannot achieve and adjusted according to wearing state dynamic
Whole call mode.Whether i.e. wearing class product can not accurately realize that detection user wears, cause its user experience further
It is promoted.
Summary of the invention
It it is a primary object of the present invention to propose a kind of wearing detection circuit, wears in class product, uses for Wrist intelligent
Whether solving the problems, such as that existing Wrist intelligent wearable product can not detect user's wearing.
To achieve the above object, a kind of wearing detection circuit provided by the invention wears class product for Wrist intelligent
In, the wearing detection circuit includes: to wear behavioral value circuit and processing circuit；
Wherein, the wearing behavioral value wears class product with the presence or absence of the Wrist intelligent is worn for detecting user
Behavior, and will test signal and be transmitted to the processing circuit；
The processing circuit receives the detection signal, and the detection signal reporting to the Wrist intelligent is worn
The processor of class product.
Wherein, the touch bleeder circuit includes: watchband resistance and detection resistance；
One end of the watchband resistance connects supply voltage, and the other end connects the first end of the detection resistance；The inspection
The second end of measuring resistance is grounded；The both ends of the detection resistance are also connected with the processing circuit respectively；
When user, which wears the Wrist intelligent, wears class product, the watchband resistance and detection resistance series connection, institute
It states detection resistance and realizes partial pressure, and output voltage is to the processing circuit；Class production is worn when user does not wear the Wrist intelligent
When product, the watchband resistance and the detection resistance are disconnected, and the detection resistance is without output voltage.
Wherein, the watchband resistance are as follows: the Wrist intelligent wears the first side watchband and second side watchband of class product,
The side of first side watchband, second side watchband and skin contact is provided with electrode, and the polarity of electrode on ipsilateral watchband
Identical, the polarity of electrode on not ipsilateral watchband is different.
Wherein, first side watchband, electrode greater than one is provided on second side watchband；And on ipsilateral watchband
All electrodes can serial or parallel connection.
Wherein, the processing circuit includes: sequentially connected amplifying circuit, detection accumulator and conversion circuit；
Wherein, the amplifying circuit, for being put to the detection signal for wearing behavioral value circuit output
Greatly；
The detection accumulator, for treated that detection signal is filtered and energy storage through the amplifying circuit；
And filtered detection signal is exported to the conversion circuit；
The conversion circuit, the detection signal for exporting to the detection accumulator is converted, and is exported
Conversion signal gives the processor.
Wherein, the amplifying circuit, comprising: first resistor, second resistance, 3rd resistor, amplifier；
One end of the first resistor connects the first end of the detection resistance, and the other end connects the anode of the amplifier；
One end of the second resistance connects the second end of the detection resistance, and the other end is separately connected the amplifier
One end of cathode and the 3rd resistor；The other end of the 3rd resistor is connect with the output end of the amplifier.
Wherein, the detection accumulator includes: unilateral diode, the second capacitor and the 4th resistance；
The forward end of the unilateral diode is connect with the output end of the amplifier, and negative end passes through the 4th resistance
It is grounded with the other end of the second capacitance connection, second capacitor.
Wherein, the detection accumulator further include: the 5th resistance；
One end of 5th resistance simultaneously with the 4th resistance and the second capacitance connection, the 5th resistance it is another
One end ground connection.
Wherein, the conversion circuit is reversed level shifting circuit.
Wherein, the reversed level shifting circuit includes: NMOS tube and the 6th resistance；
The grid of the NMOS tube simultaneously with the 4th resistance, second capacitor and the 5th resistance phase
Even, source electrode ground connection, drain electrode are connect with one end of the 6th resistance, and the other end of the 6th resistance connects supply voltage.
Wearing detection circuit proposed by the present invention is used in wrist class intelligence wearable product, including wears behavioral value electricity
Road and processing circuit.Wherein, behavioral value circuit is worn to connect with processing circuit.Behavioral value circuit is worn to use for detecting
The behavior of class product is worn with the presence or absence of the wearing Wrist intelligent in family, and will test signal and be transmitted to the processing circuit.
Processing circuit will test signal and handled and exported to the processor of wrist machine after receiving detection signal.In this way, wrist
The processor of machine can analyze detection signal according to default rule, and then can judge that user currently whether there is
Wearing behavior, and intelligently adjust according to judging result the working condition of wrist machine, such as take battery saving mode etc., adjustment is logical
Words mode etc., further promotes user experience.
Detailed description of the invention
Fig. 1 is the structural block diagram of circuit protection circuit first embodiment provided by the invention；
Fig. 2 is the structural block diagram of circuit protection circuit second embodiment provided by the invention；
Fig. 3 is the schematic diagram of the watchband resistance of circuit protection circuit second embodiment provided by the invention；
Fig. 4 is the circuit diagram of circuit protection circuit 3rd embodiment provided by the invention；
Fig. 5 is the circuit diagram of circuit protection circuit 3rd embodiment provided by the invention；
Fig. 6 is the signal that detection accumulator handles signal in circuit protection circuit 3rd embodiment provided by the invention
Figure；
Fig. 7 is output signal signal connected to the processor in circuit protection circuit 3rd embodiment provided by the invention
Figure；
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this hair
It is bright.
The mobile terminal of each embodiment of the present invention is realized in description with reference to the drawings.In subsequent description, use
For indicate element such as " module ", " component " or " unit " suffix only for being conducive to explanation of the invention, itself
There is no specific meanings.Therefore, " module " can be used mixedly with " component ".
Aiming at the problem that whether the wearing class product of Wrist intelligent in the prior art can not detect user has wearing behavior,
It is proposed a kind of each embodiment of wearing detection circuit that class product is worn for Wrist intelligent of the invention.
As shown in Figure 1, a kind of wearing detection circuit that first embodiment of the invention provides, can be used for Wrist intelligent pendant
It wears in class product, such as wrist machine, bracelet, wrist-watch.Below, it will be worn for class product is wrist machine and be carried out by Wrist intelligent
Explanation.The wearing detection circuit includes: to wear behavioral value circuit 101 and processing circuit 102.Wherein, behavioral value electricity is worn
Road 101 is connect with processing circuit 102.Behavioral value circuit 101 is worn for detecting user with the presence or absence of the wearing wrist intelligence
The behavior of class product can be worn, and will test signal and be transmitted to the processing circuit 102.Processing circuit 102 is receiving inspection
It surveys after signal, will test signal and handled and exported to the processor of wrist machine.In this way, the processor of wrist machine can basis
Default rule analyzes detection signal, and then can judge user currently and whether there is wearing behavior, and according to sentencing
Adjust the working condition of wrist machine, such as take battery saving mode to disconnected result intelligent etc., adjustment call mode etc. is further promoted
User experience.
As shown in Fig. 2, being a kind of wearing detection circuit that second embodiment of the invention provides, the present embodiment is to upper one
The specific refinement of embodiment.
Specifically, wearing behavioral value circuit 101 includes: watchband resistance ROWith detection resistance RSHUNT.Wherein, watchband electricity
Hinder ROIt is specifically as follows the first side watchband and second side watchband that Wrist intelligent wears class product.Also, the first side watchband with
The side of the side (table body back side) of skin contact, second side watchband and skin contact is provided with one or more electrodes,
And the polarity of electrode on ipsilateral watchband is identical, the polarity of electrode on not ipsilateral watchband is different, as shown in Figure 3.In Fig. 3, watchband
On small circle represent metal electrode, open circle is different from solid rim electrode.The present embodiment has resistance using the skin of user
Anti- feature, therefore metal electrode is devised on the inside of watchband, the electrode after equipment such as wrist machine in user's wearing, on the inside of watchband
The contact with human skin is then realized, and then forms watchband resistance RO。
It should be noted that due to one or more metal electrodes settable on ipsilateral watchband, when being provided with multiple metals
It, can serial or parallel connection between multiple electrodes when electrode.
In addition, watchband resistance ROWith detection resistance RSHUNTSeries connection.I other words watchband resistance ROOne end connection power supply electricity
Press VS(supply voltage that intelligence wears class product), other end connecting detection resistance RSHUNTOne end, detection resistance RSHUNTIt is another
One end ground connection.In this way, when user wears wrist machine, watchband resistance ROIt is formed, detection resistance RSHUNTIt realizes partial pressure, and exports electricity
It is depressed into processing circuit 102.
As shown in Fig. 2, processing circuit 102 specifically includes: amplifying circuit 1021, detection accumulator 1022 and conversion electricity
Road 1023.Wherein, amplifying circuit 1021 is sequentially connected detection accumulator 1022 and conversion circuit 1023.
The detection resistance R due to caused by user's wearing behaviorSHUNTVoltage it is very small, therefore, it is necessary to amplifying circuits 1021
The detection signal (specifically voltage signal) for wearing behavioral value circuit output is amplified, and amplified voltage is believed
Number output is to detection accumulator 1022.
Detection resistance RSHUNTThere are noises in the voltage signal of output, therefore the effect of detection accumulator 1022 is one
Aspect filters out the noise in the voltage signal after enhanced processing, is on the other hand then energy storage and release energy.And it will be through filtering
Treated that voltage signal is exported to conversion circuit 1023 for wave.
Conversion circuit 1023 accept filter after voltage signal, and be processing with wrist machine to voltage signal processing
The voltage signal of device adaptation, so as to the normal and steady operation of processor.
Specifically, when the wearing detection circuit work of the embodiment of the present invention, if user wears wrist machine, the skin of user
It is contacted respectively with wrist machine two sides watchband, watchband resistance ROFormed, and with detection resistance RSHUNTSeries connection, detection resistance RSHUNTIt realizes and divides
Pressure, and output voltage signal to amplifying circuit 1021.Amplifying circuit 1021 amplifies processing to the voltage signal, and will
Voltage signal after enhanced processing is filtered, purely dry to provide for subsequent conditioning circuit to eliminate the noise after voltage signal
Net signal, and the voltage signal after filtering processing is exported to conversion circuit 1023.Conversion circuit 1023 to voltage signal into
Row conversion, to be processed into the matched conversion voltage signal of the processor of wrist machine to processor, to guarantee the normal of processor
Steady operation.When user removes wrist machine, watchband resistance ROIt is not formed, RSHUNTPartial pressure is not implemented, no output voltage is to amplifying electricity
Road 1021.At this point, the energy release stored in detection accumulator 1022, conversion circuit 1023 export different conversion voltage
Signal is to processor.Therefore, processor can analyze the conversion voltage signal received, can judge currently to use
Whether wrist machine is worn in family.
The wearing detection circuit of the embodiment of the present invention passes through watchband resistance, detection resistance, amplifying circuit, detection energy storage electricity
The mutual cooperation on road and conversion circuit, is able to detect whether user produces wearing behavior, and when generating wearing behavior, leads to
It crosses the amplification of amplifying circuit, detect the filtering of accumulator, the voltage conversion of conversion circuit, to ensure that wrist machine processor
Normal table identification with signal analyze, promoted intelligence wear detection accuracy.
It is the wearing detection circuit that third embodiment of the invention provides as shown in Fig. 4 to 5.It wherein, is table shown in Fig. 4
The case where metal electrode in strip resistance is connected, shown in fig. 5 is the situation of the metal electrode parallel connection in watchband resistance.With it is upper
Unlike one embodiment, the wearing detection circuit of the embodiment of the present invention, amplifying circuit 1021 is specifically included:
First resistor R1, second resistance R2,3rd resistor R3, amplifier OPAD1.
Wherein, one end connecting detection resistance R of first resistor R1SHUNTFirst end, first resistor R1 the other end connection
The anode of amplifier OPAD1.One end connecting detection resistance R of second resistance R2SHUNTSecond end, the other end of second resistance R2 point
Not Lian Jie the cathode of amplifier OPA D1 and one end of 3rd resistor R3, the output of the other end of 3rd resistor R3 and amplifier OPAD1
End connection.
The wearing detection circuit of the embodiment of the present invention, detection accumulator 1022 specifically include:
Unilateral diode VT1, the second capacitor C2, the 4th resistance R4 and the 5th resistance R5.
Wherein, the forward end of unilateral diode is connect with the output end of amplifier OPAD1, and negative end passes through the 4th resistance R4
It is connect with the second capacitor C2, the other end ground connection of the second capacitor C2.One end of 5th resistance R5 simultaneously with the 4th resistance R4 and the
Two capacitor C2 connections, the other end ground connection of the 5th resistance.
The wearing detection circuit of the embodiment of the present invention, conversion circuit 1023 are specially reversed level shifting circuit.This is reversed
Level shifting circuit specifically includes: NMOS tube D2 and the 6th resistance R6.
Wherein, the grid of NMOS tube is connected with the 4th resistance R4, the second capacitor C2 and the 5th resistance R5 simultaneously, source electrode
Ground connection, drain electrode are connect with one end of the 6th resistance R6, and the other end of the 6th resistance R6 connects voltage VddIO.
The embodiment of the present invention wearing detection circuit work when, when wrist skin is not in contact with wrist machine, the both ends Rshunt without
Voltage；And when wrist skin contact wrist machine, wrist skin resistance and Rshunt form series circuit, realize partial pressure；Amplification electricity
It routes R1, R2, R3 and amplifier OPA D1 is constituted, the amplification to Rshunt both end voltage amplitude is realized, to realize a variety of
When skin contact, the skin contact of different impedances is detected, and realizes the promotion of signal-to-noise ratio, effectively determines the hair of skin contact behavior
It is raw.
Detection accumulator is made of VT1, R4, C2 and R5, this circuit deposits the energy for the signal that amplifying circuit exports
Storage carries out positive detection to AC signal, and stores direct current+AC signal energy in C2；And outputs level signals are to reversed
Level shifting circuit.
The operation schematic diagram of noise-detection accumulator is illustrated in fig. 6 shown below, and the biggish signal of amplitude is circuit input letter
Number, it is the 50HZ signal for having DC component, maximum amplitude 4.4V, minimum amplitude is only 0.4V, the lesser output signal of amplitude
It is then the approximate DC voltage signal after detection energy storage, alternating-current magnitude is only the 1/6 of input exchange signal VPP, and signal is minimum
Value substantially increases, and is significantly higher than 1V.
After wrist is detached from wrist machine, R5 realizes the C2 after skin contact is detached from for releasing to C2 capacitor storage energy
The filter action that the release action of capacitive charge storage and of short duration contact are detached from.AC noise is present in alternating current environment
Hz noise, when human skin contacts electrode zone, is connected by R1 and Human skin resistance and is divided by absorption of human body
It transmits into noise-detection accumulator circuit, which can effectively receive amplified direct current and AC signal, real after energy storage
Now to the control of reversed level go to circuit.
Reversed level shifting circuit is made of VddIO and R6, D2, for realizing noise-detection accumulator " output signal
The transformation (conversion of polarity of voltage conversion and logic level) of level, detects signal by MCU/AP and skin contact
It shakes hands, effectively reporting for skin contact event is realized, as shown in Fig. 7.After taking wrist machine in wrist, wrist skin and electrode
When effectively contacting, detecting circuit output is effectively higher than the voltage signal of Vgs, and D2 conducting, then KEY-IO signal is set to low electricity
Flat, system detection to wrist machine wears event；If wrist machine is removed from wrist, the C2 in detection accumulator can be let out by R5
Electric discharge lotus, detecting circuit output signal can be lower than Vgs, so that D2 is closed, then KEY_IO signal is set to high level (vddio),
System detection is removed from wrist to wrist machine.
The wearing detection circuit of the embodiment of the present invention is led to by the way that metal electrode is arranged on the inside of the watchband of wearing class product
The principle that human skin has impedance characteristic is crossed, watchband contacts effectively detection with human skin and wears shape when wearing using user
State realizes the purpose of human skin contact detection.
Meanwhile the principle that this circuit realizes the human body impedance of human skin contact and series resistance is divided, pass through
Signal condition electricity, level processing, obtain the skin contact event under effective wearing state, and then determine that user wears wrist machine
Whether.This circuit realizes the skin contact detection that human body touch is brought into, efficiently solves in high impedance, because space is electric
Magnetic radiation brings the Energy extraction of the industrial frequency noise signal of circuit by touching to skin, effectively puts characteristic noise signal
Greatly, it and extracts its energy, applies for touching behavior in the energy that circuit touches decision threshold, being also used for being applied to key has
In the judgement of effect behavior, the signal-to-noise ratio of circuit is promoted.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant be intended to it is non-
It is exclusive to include, so that the process, method, article or the device that include a series of elements not only include those elements,
It but also including other elements that are not explicitly listed, or further include for this process, method, article or device institute
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or device including the element.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but many situations
It is lower the former be more preferably embodiment.Based on this understanding, technical solution of the present invention is substantially in other words to the prior art
The part to contribute can be embodied in the form of software products, which is stored in a storage and is situated between
In matter (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be mobile phone, calculate
Machine, server, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (10)
1. a kind of wearing detection circuit is worn in class product, which is characterized in that the wearing detection circuit packet for Wrist intelligent
It includes: wearing behavioral value circuit and processing circuit；
Wherein, the wearing behavioral value circuit wears class product with the presence or absence of the Wrist intelligent is worn for detecting user
Behavior, and will test signal and be transmitted to the processing circuit；
The processing circuit receives the detection signal, and the detection signal is handled and is exported to the Wrist intelligent
Wear the processor of class product.
2. wearing detection circuit as described in claim 1, which is characterized in that the wearing behavioral value circuit includes: watchband
Resistance and detection resistance；
One end of the watchband resistance connects supply voltage, and the other end connects the first end of the detection resistance；The detection electricity
The second end of resistance is grounded；The both ends of the detection resistance are also connected with the processing circuit respectively；
When user, which wears the Wrist intelligent, wears class product, the watchband resistance and detection resistance series connection, the inspection
Measuring resistance realizes partial pressure, and output voltage is to the processing circuit；When user, which does not wear the Wrist intelligent, wears class product,
The watchband resistance and the detection resistance disconnect, and the detection resistance is without output voltage.
3. wearing detection circuit as claimed in claim 2, which is characterized in that the watchband resistance are as follows: the Wrist intelligent is worn
The the first side watchband and second side watchband of class product are worn, the side of first side watchband, second side watchband and skin contact is equal
It is provided with electrode, and the polarity of electrode on ipsilateral watchband is identical, the polarity of electrode on not ipsilateral watchband is different.
4. wearing detection circuit as claimed in claim 3, which is characterized in that on first side watchband, second side watchband
It is provided with the electrode greater than one；And all electrodes on ipsilateral watchband can serial or parallel connection.
5. according to any one of claims 1 to 4 wear detection circuit, which is characterized in that the processing circuit include: according to
Amplifying circuit, detection accumulator and the conversion circuit of secondary connection；
Wherein, the amplifying circuit, for being amplified to the detection signal for wearing behavioral value circuit output；
The detection accumulator, for treated that detection signal is filtered and energy storage through the amplifying circuit；And it is defeated
Filtered detection signal is to the conversion circuit out；
The conversion circuit, the detection signal for exporting to the detection accumulator is converted, and exports conversion
Signal gives the processor.
6. wearing detection circuit as claimed in claim 5, which is characterized in that the amplifying circuit, comprising: first resistor, the
Two resistance, 3rd resistor, amplifier；
One end of the first resistor connects the first end of the detection resistance, and the other end connects the anode of the amplifier；
One end of the second resistance connects the second end of the detection resistance, the other end be separately connected the amplifier cathode and
One end of the 3rd resistor；The other end of the 3rd resistor is connect with the output end of the amplifier.
7. wearing detection circuit as claimed in claim 6, which is characterized in that the detection accumulator includes: unidirectional two pole
Pipe, the second capacitor and the 4th resistance；
The forward end of the unilateral diode is connect with the output end of the amplifier, and negative end passes through the 4th resistance and second
Capacitance connection, the other end ground connection of second capacitor.
8. wearing detection circuit as claimed in claim 7, which is characterized in that the detection accumulator further include: the 5th electricity
Resistance；
One end of 5th resistance simultaneously with the 4th resistance and the second capacitance connection, another termination of the 5th resistance
Ground.
9. wearing detection circuit as claimed in claim 7, which is characterized in that the conversion circuit is reversed level conversion electricity
Road.
10. wearing detection circuit as claimed in claim 9, which is characterized in that the reversed level shifting circuit includes: NMOS
Pipe and the 6th resistance；
The grid of the NMOS tube is connected with the 4th resistance, second capacitor and the 5th resistance simultaneously, source electrode
Ground connection, drain electrode are connect with one end of the 6th resistance, and the other end of the 6th resistance connects supply voltage.
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| CN201910414876.3A CN110376649A (en) | 2019-05-17 | 2019-05-17 | Wear detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910414876.3A CN110376649A (en) | 2019-05-17 | 2019-05-17 | Wear detection circuit |
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| CN110376649A true CN110376649A (en) | 2019-10-25 |
Family
ID=68248566
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Cited By (4)
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| CN110784793A (en) * | 2019-10-29 | 2020-02-11 | 歌尔股份有限公司 | Wear detector and wearing formula electronic equipment |
| CN111551995A (en) * | 2020-05-07 | 2020-08-18 | 安徽华米信息科技有限公司 | Wearable equipment and wear detection device thereof |
| CN113080920A (en) * | 2021-04-21 | 2021-07-09 | 上海跳与跳信息技术合伙企业(有限合伙) | Wearable device with in-vivo detection function and in-vivo detection method thereof |
| CN115211852A (en) * | 2022-08-31 | 2022-10-21 | 深圳叩鼎科技有限责任公司 | Intelligent watch capable of accurately detecting blood oxygen |
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| CN109445547A (en) * | 2018-10-25 | 2019-03-08 | 努比亚技术有限公司 | A kind of wearable device heat dissipating method, wearable device and readable storage medium storing program for executing |
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