A kind of Wearable device based on solar cell for supplying power
Technical field
The utility model is related to wearable chair apparatus field, especially a kind of wearing based on solar cell for supplying power
Wear formula equipment.
Background technology
At present, Wearable device is by a large amount of popularization and applications, but because the function of Wearable device strengthens and sensor
Increase, power consumption is increasing, continuous use time is very short with respect to general wristwatch, need by week or monthly carry out power supply benefit
Fill, the compact power that can carry with enjoys favor.
Most of photovoltaic portable power source is solar cell and electronic product released state at present, unreal
Existing integrated design, exists and easily leaves behind power supply or carry inconvenient problem with use.Even if some products achieve one
Bodyization design, by used solar cell types, size and structure the reason, often extinction face receive light source area
Little, solar cell power generation efficiency is low, and the actual photoelectric conversion capacity of this kind of product is limited to be only capable of driving quartz watch cannot drive
The more wearing products of the power consumptions such as dynamic Wearable device.
Especially, in low irradiance it is impossible to provide suitable electricity by solar cell to smart machine.
Utility model content
Goal of the invention of the present utility model is:The problem existing for prior art, a kind of solar cell that is based on supplies
The Wearable device of electricity.When solving low illumination or high-intensity illumination by controlling the change of solar battery structure, too
Sun can wafer cannot normal power supply problem.Possess in low illumination or high-intensity illumination situation, solar cell is polymerized to lithium
The function that thing battery charges.
The technical solution adopted in the utility model is such:
A kind of included based on the Wearable device of solar cell for supplying power:Wearable device wrist strap, wearable set
Standby main frame, described Wearable device main frame embedded micro-processor, OLED display screen, sensor group, key circuit, USB charge
Circuit and solar charging circuit;OLED display screen, sensor group, key circuit are connected with microprocessor respectively;Lighium polymer
Battery gives microprocessor, OLED display screen and sensor group respectively and powers.
Further, described solar charging circuit includes:Including n series connection solar wafer solar cell,
The threshold decision circuit being detected for the voltage signal values that current solar cell is exported, the first solar wafer positive pole
Output voltage signal values export as solar cell voltage signal values, for receive threshold decision circuit partial pressure control
Signal or pressurization control signal, the corresponding n solar wafer controlling in solar cell break-make in parallel or in series respectively
Control circuit and for carrying out nursing one's health modulate circuit by solar cell output voltage values, modulate circuit output end is polymerized with lithium
Thing cell input terminal connects;
Further, described threshold decision circuit includes two comparators, and the input of first comparator normal phase input end is fixed
Voltage threshold;The fixing voltage threshold of second comparator reverse input end input, first comparator inverting input and the
Two comparator normal phase input ends are common to access the first solar wafer positive terminal;When the magnitude of voltage of solar cell output is less than the
During one comparator normal phase input end input voltage, then first comparator normal phase input end magnitude of voltage is higher than that first comparator is anti-phase defeated
Enter terminal voltage value, then first comparator output end output high level;Second reverser normal phase input end magnitude of voltage is less than the simultaneously
Two reverser reverse input end magnitudes of voltage, then the second comparator deferent segment output low level;
When the magnitude of voltage of solar cell output is higher than first comparator normal phase input end input voltage, then first compares
Device normal phase input end magnitude of voltage is less than first comparator anti-phase input terminal voltage value, then first comparator output end exports low electricity
Flat;Second reverser normal phase input end magnitude of voltage is higher than the second reverser reverse input end magnitude of voltage simultaneously, then the second comparator
Deferent segment exports high level;When first comparator output end exports high level, simultaneously during the second comparator output low level, then shape
Composition presses control signal;When first comparator output end exports low level, simultaneously during the second comparator output high level, then formed
Pressurization control signal.
Further, described on-off control circuit includes connect on-off control circuit and on-off control circuit in parallel, institute
State series connection on-off control circuit and include first switch device, second switch device and the (n-1)th derailing switch, on-off control circuit bag in parallel
Include the n-th derailing switch and the (n+1)th derailing switch, when threshold decision circuit includes two comparators, then first comparator output end
It is connected with first switch device control end, second switch device control end and the (n-1)th derailing switch control end, the second comparator output terminal
It is connected with the n-th derailing switch control end, the (n+1)th derailing switch control end, first switch device input and the first solar wafer negative pole
End connects, and first switch output end is connected with the second solar wafer positive terminal, second switch device input and the second solar energy
Wafer negative pole connects, and second switch device output end is connected with the (n-1)th solar wafer positive pole, the (n-1)th derailing switch input and the
N-1 solar wafer negative pole connects, and the (n-1)th derailing switch output end is connected with the n-th solar wafer positive pole;First solar wafer
Positive terminal is connected with modulate circuit input, the n-th solar wafer negative pole end ground connection;N-th derailing switch input and first sun
Can wafer positive terminal, the second solar wafer positive terminal, the n-th/2 solar wafer positive pole connect, the n-th derailing switch output end and the
N/2+1 solar wafer positive terminal, the (n-1)th solar wafer positive terminal connect;(n+1)th derailing switch input and the first solar energy
Wafer negative pole end, the second solar wafer negative pole end, the n-th/2 solar wafer negative pole end connect, the (n+1)th derailing switch output end with
N-th/2+1 solar wafer negative pole end, the (n-1)th solar wafer negative pole end connect, and when n is for even number, n/2 is the half of n, when
When n is odd number, then n/2 is(1+n)/2.
Further, when on-off control circuit receives partial pressure control signal, first switch device turns on, second switch device
Disconnect, then the first solar wafer negative pole is connected with the second solar wafer positive pole, and the second solar wafer negative pole and (n-1)th is too
Sun can wafer positive pole connect, and the (n-1)th solar wafer negative pole is connected with n-th solar wafer positive pole so that the first solar energy
Wafer, second solar wafer ... the n-th solar wafer are sequentially connected in series;When on-off control circuit receives pressurization control signal
When, second switch device turns on, and second switch device turns on, then the first solar wafer positive pole is connected with the second solar energy positive pole, the
One solar wafer negative pole is connected with the second solar energy negative pole, then the first solar wafer and the second solar wafer formed in parallel
Circuit.
Further, described sensor includes acceleration transducer, baroceptor, gyroscope, magnetometer, TEMP
Device, humidity sensor, infrared proximity transducer and heart rate sensor;Acceleration transducer, baroceptor, gyroscope, magnetic force
Meter, temperature sensor, humidity sensor, infrared proximity transducer and heart rate sensor are connected with microprocessor respectively.
In sum, due to employing technique scheme, the beneficial effects of the utility model are:
Most of Wearable device is required for being charged in use for some time, using gallium arsenide film solar energy
Not only low-carbon environment-friendly average life span reaches more than 10 years the wearable device of battery and lithium polymer battery hybrid power supply, and can be big
Extend use time after its single charge greatly, with regard to energy automatic charging under the low light level and strong light environment, or even do not need user to charge, pole
Greatly user-friendly.Also can charge for Wearable device under low illumination and high-intensity illumination environment, greatly increase
User's single charge use time, or even do not need to charge.
Brief description
Fig. 1 the utility model theory diagram.
Fig. 2 is solar charging circuit structural representation.
Fig. 3 is that solar charging circuit includes solar cell during two solar wafers, threshold decision circuit and leads to
The schematic diagram of disconnected control circuit.
Fig. 4 modulate circuit figure.
Specific embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only in order to explain
The utility model, is not used to limit the utility model.
The utility model related description:
1. two comparators that threshold decision circuit includes, U1, U4 in comparator such as Fig. 3;The one of input of comparator
Hold as threshold value input;Comparator another one input is the first solar wafer electrode input end;Comparator the 3rd port
It is feeder ear, comparator the 4th port is earth terminal;Comparator the 5th port is output end.Derailing switch control end is defeated with comparator
Go out end to connect, derailing switch input, derailing switch output end are connected with solar wafer positive pole, negative pole.When derailing switch control end is received
During to comparator high level signal, then derailing switch input and derailing switch output end turn on.
In described series connection on-off control circuit and on-off control circuit in parallel, the n derailing switch course of work is:Derailing switch
Control end is the port whether controlling switch device input is turned on derailing switch output end.When the high electricity of derailing switch control port input
During ordinary mail, then derailing switch input is connected with derailing switch output end.Derailing switch is the conduction devices such as IGBT or metal-oxide-semiconductor.As Fig. 3
Middle U2, U3, U4;The B2 end of derailing switch is control end, the A2 end position input of derailing switch;The non-output end in A1 end of derailing switch
(out), the B1 end position earth terminal of derailing switch;
3. modulate circuit operation principle:
N solar wafer of acquiescence is cascaded by analog switch, when threshold decision circuit(Two comparators
Judged)Output voltage is detected and be more than maximum voltage threshold(4.5V)When, solar cell passes through on-off control circuit by n
Individual solar wafer simultaneously connects;When threshold decision circuit(Two comparators are judged)The solar wafer output electricity detecting and connecting
Force down in maximum voltage threshold, and be higher than minimum voltage threshold value Min(Boost pressure controller cut-in voltage in modulate circuit)When, too
Sun can pass through on-off control circuit by n solar wafer series model by battery.Maximum voltage threshold Max is charging voltage.When
Threshold decision circuit(Two comparators are judged)Output voltage is detected and be less than minimum voltage threshold value(0.7V)When, solar energy
Charging circuit does not work, and can only be powered by USB port.
Solar cell exports, through modulate circuit, by its internal boost pressure controller by boost in voltage to the electricity that charges
Pressure(4.5V) charge to lithium polymer battery.
4. solar cell is detected, output voltage signal is to modulate circuit simultaneously by threshold decision circuit in real time.
5. low illumination refers to illuminance and is less than 600LUX is higher than 300LUX, and solar cell output voltage is more than or equal to
Minimum voltage threshold Min(Modulate circuit I operational voltage value 0.7V);High-intensity illumination refers to solar cell output
Voltage is more than maximum voltage threshold Max(Modulate circuit maximum input voltage value 4.5V).
6. Wearable device wrist strap is the structure of device fixation in Wearable device, and Wearable device main frame refers to
Be the housing being connected by Wearable device wrist strap.
7. modulate circuit is to be realized by Fig. 4;Wherein boost chip boost converter requires low-power consumption, then defeated
Go out the boost chip such as voltage 4.3V to realize, for example:tps610987、tps610988.Fig. 4 effect is an up voltage to charging voltage
(Maximum voltage threshold).In Fig. 4, Vin is the voltage signal from the output of solar cell the first solar wafer positive pole, and Vmain is
The port being connected with lithium polymer battery.Voltage signal after will boosting is supplied to lithium polymer battery.
8. microprocessor internal carries 2.4 wireless sensor modules and bluetooth module.
The utility model forms:Including Wearable device wrist strap, Wearable device main frame, described Wearable device
Main frame embedded micro-processor, OLED display screen, sensor group, key circuit, USB charging circuit and solar charging circuit;
OLED display screen, sensor group, key circuit are connected with microprocessor respectively;Lithium polymer battery give respectively microprocessor,
OLED display screen and sensor group are powered.
Wherein said solar charging circuit includes:Including the solar cell of the solar wafer of n series connection, for right
The threshold decision circuit that the voltage signal values of current solar cell output are detected, the first solar wafer positive pole output
Voltage signal values that voltage signal values export as solar cell, for receive threshold decision circuit partial pressure control signal or
Pressurization control signal, the corresponding n solar wafer controlling in solar cell break-make control electricity in parallel or in series respectively
Road and for carrying out nursing one's health modulate circuit, modulate circuit output end and lithium polymer battery by solar cell output voltage values
Input connects.
Wherein threshold decision circuit, for the voltage signal values that current solar cell is exported(First solar wafer
The voltage signal values of positive pole output)Detected, when the voltage signal values of solar cell output are more than or equal to maximum voltage threshold
Value Max(4.5V)When, then send partial pressure control signal to on-off control circuit;When the voltage signal values of solar cell output are little
In maximum voltage threshold Max(0.7V), and during more than minimum voltage threshold Min, then send pressurization control signal to break-make control
Circuit;When the voltage signal values of solar cell output are less than 0.7V, solar charging circuit cannot charge, then pass through USB
Charging circuit is charged;Minimum voltage threshold Min is modulate circuit I operational voltage value;Maximum voltage threshold is conditioning
Circuit maximum can input voltage value;
The threshold decision circuit course of work is:When the voltage signal values of solar cell output are more than or equal to maximum voltage threshold
During value Max, then send partial pressure control signal to on-off control circuit;When the voltage signal values of solar cell output are less than maximum
Voltage threshold Max, and during more than minimum voltage threshold Min, then send pressurization control signal to on-off control circuit;Work as solar energy
When the voltage signal values of battery output are less than 0.7V, solar charging circuit cannot charge, then filled by USB charging circuit
Electricity;Minimum voltage threshold Min is modulate circuit I operational voltage value;Maximum voltage threshold can input for modulate circuit maximum
Magnitude of voltage;
When solar cell output voltage signal is more than or equal to minimum voltage threshold Min, rise voltage-controlled inside modulate circuit
Device processed by input voltage be lifted to maximum voltage threshold and by solar cell electricity be supplied to lithium polymer battery charge;When too
When sun energy cell output voltage signal is more than or equal to maximum voltage threshold Max, modulate circuit is adapted to by it by Partial Pressure Controller
Voltage.
Wherein, described threshold decision circuit includes two comparators, the fixing electricity of first comparator normal phase input end input
Pressure threshold value;The fixing voltage threshold of second comparator reverse input end input, first comparator inverting input and the second ratio
Compared with device normal phase input end common access the first solar wafer positive terminal;When the magnitude of voltage of solar cell output is less than the first ratio
During compared with device normal phase input end input voltage, then first comparator normal phase input end magnitude of voltage is higher than first comparator inverting input
Magnitude of voltage, then first comparator output end output high level;Second reverser normal phase input end magnitude of voltage is anti-less than second simultaneously
To device reverse input end magnitude of voltage, then the second comparator deferent segment output low level;
The course of work:When the magnitude of voltage of solar cell output is higher than first comparator normal phase input end input voltage,
Then first comparator normal phase input end magnitude of voltage is less than first comparator anti-phase input terminal voltage value, then first comparator output end
Output low level;Second reverser normal phase input end magnitude of voltage is higher than the second reverser reverse input end magnitude of voltage simultaneously, then and the
Two comparator deferent segment output high level;When first comparator output end exports high level, the second comparator exports low electricity simultaneously
At ordinary times, then form partial pressure control signal;When first comparator output end exports low level, the second comparator output high level simultaneously
When, then form pressurization control signal.
Embodiment one:
In solar charging circuit, as n=2, described on-off control circuit includes connect on-off control circuit and parallel connection
On-off control circuit, described series connection on-off control circuit includes first switch device, and on-off control circuit in parallel includes second switch
Device and second switch device;When threshold decision circuit includes two comparators, then first comparator output end and first switch
Device control end connects, and the second comparator output terminal is connected with second switch device control end, the 3rd derailing switch control end, first switch
Device input and the first solar wafer(SOLAR1 in corresponding Fig. 2 or Fig. 3)Negative pole end(The "-" of SOLAR1 in corresponding Fig. 2
SOLAR1- in end or Fig. 3)Connection, first switch output end and the second solar wafer(In corresponding Fig. 2 or Fig. 3
SOLAR2)Positive terminal(In SOLAR2 in corresponding Fig. 2 "+" SOLAR2+ in end or Fig. 3)Connect, the first solar wafer is just
Extremely(In SOLAR1 in corresponding Fig. 2 "+" SOLAR1+ in end or Fig. 3)It is connected with modulate circuit input, the second solar energy
Wafer negative pole end(In SOLAR2 in corresponding Fig. 2 "+" SOLAR2+ in end or Fig. 3)Ground connection;Second switch device input and
One solar wafer positive terminal connects, and second switch device output end is connected with the second solar wafer positive terminal;3rd derailing switch
Input is connected with the first solar wafer negative pole end, and the 3rd derailing switch output end is connected with the second solar wafer negative pole end.
Embodiment two:
Threshold decision circuit includes analog-digital converter and processor, the voltage signal of the first solar wafer positive terminal output
Data signal is converted to by analog-digital converter, and threshold decision is carried out by processor, when the voltage of solar cell output
When value is higher than first comparator normal phase input end input voltage, processor first output port exports high level, simultaneous processor
Second output port output low level, forms partial pressure control signal;When the magnitude of voltage of solar cell output compares less than first
During device normal phase input end input voltage, processor first output port exports low level, and simultaneous processor second output port is defeated
Go out high level, then form pressurization control signal.
Embodiment three:
On-off control circuit includes connect on-off control circuit and on-off control circuit in parallel, and described series connection break-make controls
Circuit includes first switch device(U2 in corresponding Fig. 3), on-off control circuit in parallel includes second switch device(U3 in corresponding Fig. 3)With
And the 3rd derailing switch(U5 in corresponding Fig. 3), when threshold decision circuit includes two comparators(U1, U4 in corresponding Fig. 3)When, then
One comparator(U1 in corresponding Fig. 3)Output end(U1 the 5th port in corresponding Fig. 3)With first switch device control end(U2 in corresponding Fig. 3
B2 port)Connect, the second comparator(U4 in corresponding Fig. 3)Output end and second switch device control end(The B2 of U3 in corresponding Fig. 3
Port), the 3rd derailing switch control end the 3rd derailing switch control end(The B2 port of U5 in corresponding Fig. 3)Concurrent connects, first switch
Device input(The A2 port of U2 in corresponding Fig. 3)It is connected with the first solar wafer negative pole end, first switch output end(Corresponding diagram
The A1 port of U2 in 3)It is connected with the second solar wafer positive terminal, second switch device input(The A2 end of U3 in corresponding Fig. 3
Mouthful)It is connected with the second solar wafer negative pole, second switch device output end(The A1 port of U3 in corresponding Fig. 3)With the first solar energy
Wafer positive pole connects, and first switch device input is connected with the first solar wafer negative pole, first switch device output end and second
Solar wafer positive pole connects;First solar wafer positive terminal is connected with modulate circuit input, and the second solar wafer is born
Extreme ground connection;Second switch device input and the first solar wafer positive terminal, the second solar wafer positive terminal, first sun
Can wafer positive pole connect, second switch device output end is with the second solar wafer positive terminal, the first solar wafer positive terminal even
Connect;3rd derailing switch input with(The A2 port of U5 in corresponding Fig. 3)First solar wafer negative pole end, the second solar wafer
Negative pole end, the first solar wafer negative pole end connect, the 3rd derailing switch output end(The A1 port of U5 in corresponding Fig. 3)With second too
Sun can wafer negative pole end, the first solar wafer negative pole end connection.When two solar wafer series connection, power supply electricity can be improved
Pressure value;When two solar wafers are in parallel, then reduce voltage value.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all this
Any modification, equivalent and improvement made within the spirit of utility model and principle etc., should be included in the utility model
Protection domain within.