CN105823919A - Test method for accurately representing output voltage or current values of nanogenerator - Google Patents
Test method for accurately representing output voltage or current values of nanogenerator Download PDFInfo
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- CN105823919A CN105823919A CN201610184286.2A CN201610184286A CN105823919A CN 105823919 A CN105823919 A CN 105823919A CN 201610184286 A CN201610184286 A CN 201610184286A CN 105823919 A CN105823919 A CN 105823919A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Abstract
The present invention provides a test method for accurately representing output voltage or current values of a nanogenerator. Prior to applying or cancelling stress or strain, the test method is able allow the test circuit, connected with a voltage (current) tester, of the nanogenerator to be located in the disconnection state; and after the stress or strain applying or cancelling state is stable, the test circuit is connected, so that the pulse output voltage (current) can be steadily and accurately tested. The test method for accurately representing output voltage or current values of a nanogenerator is able to completely eliminate the influences, caused by the stress or strain rate, on the test results in a traditional test method and allow each measurement to obtain the max output value of the nanogenerator; and moreover, the test method provided by the invention is good in accuracy and stability of the output voltage (current) measured by the nanogenerator, and has important values for the output performance assessment and the device parameter representation of the nanogenerator and the design of the related integrated devices.
Description
Technical field
The present invention relates to a kind of nano generator output voltage or the method for testing of current value, significant in terms of the accurate Characterization and analysis of nano generator performance.
Background technology
In recent years, reduction along with utilization of new energy resources cost, global energy general layout adjusts, the utilization of new forms of energy is by attention increasingly, wherein the new energy technology such as nuclear energy, wind energy, solar energy relatively early takes the lead in being applied because development, however the distribution of these energy to be limited to the factor impacts such as region, time, weather notable.Also containing a kind of energy-mechanical energy in environment, these energy are nearly ubiquitous, these collection of energy got up by certain means and are converted into electric energy, will be greatly improved the efficiency of energy utilization of the mankind.
Nano generator is that one utilizes the character such as piezoelectric effect, triboelectrification effect, the device that faint changes mechanical energy is electric energy being distributed in environment in conjunction with nanotechnology.Wherein piezoelectric nano electromotor piezoelectric effect based on material, i.e. piezoelectric produce piezoelectric charge when deforming upon thus cause the flowing of external electrical；Friction generator is then positive and negative charge based on fricative separation mutual between triboelectrification effect, i.e. different materials thus causes electronics to flow.Being different from traditional power generating device (such as electromagnetic generator, solaode etc.), nano generator is output as the alternating current of impulse form rather than constant electricity output.When nano generator deforms upon under extraneous mechanism, meeting instantaneous output pulse current in one direction, when external mechanical power cancels deformation recovery, rightabout pulse current can be produced.Accurately testing this alternating-current pulse output signal of telecommunication is the key of nano generator performance characterization, significant simultaneously for effectively utilizing of nano generator output electric energy.
The existing method of testing to nano generator is directly to be connected with voltage (electric current) tester at nano generator the two poles of the earth, the voltage (electric current) that real time record nano generator produces under mechanical action over time, i.e. output voltage (electric current)-time graph.In theory, the output voltage (electric current) of nano generator is only relevant with suffered stress or strain size.But in existing actual measurement, the output size of nano generator is affected fairly obvious by stress or strain rate, and stress or the biggest output voltage of strain rate (electric current) are the biggest.Therefore to same device, even if applying stress or the strain of formed objects, owing to it cannot be guaranteed that the rate controlled during Shi Jiaing is completely the same, causing measurement result to vary, it is difficult to that there is comparability.This performance evaluation having had a strong impact on nano generator and raising.
Summary of the invention
In order to solve the problems referred to above, it is an object of the invention to provide a kind of stress or strain rate can effectively got rid of and nano generator is exported the impact caused, and the maximum output limit that nano generator is close when stress or strain rate constantly increase can be recorded, be one can stablize, exactly characterize nano generator output voltage (electric current) universal testing method.
The technical scheme is that a kind of accurate measurement nano generator output voltage or the method for electric current, the method is by before applying or cancel stress or strain, the test circuit being first connected with voltage or current tester by nano generator disconnects, after stress or strain applying complete, the moment of Guan Bi test circuit can record pulse output voltage or current value, can record nano generator output voltage or the current versus time curve of circulation continuously.
Specifically including of the method is as follows:
Step 1: piezoelectric nano electromotor, voltage or current tester, switch series are unified into loop, voltage or current tester can the output voltage of real time record piezoelectric nano electromotor or electric current over time；
Step 2: first described switch is turned off state, the speed applied during quantitative stress or strain, stress or strain apply to nano generator can be that arbitrarily voltage or current tester record in the process real-time voltage or current value are zero always；
Step 3: by described switch Guan Bi after complete stress to be applied or strain, the most described voltage or current tester record pulse output voltage in one direction or current value；
Step 4: treat that real-time voltage that described voltage or current tester record or current value return back to zero again, again described switch is turned off state, then the stress applied or strain are cancelled, the speed cancelled can be any, and voltage or current tester record in the process real-time voltage or electric current are zero；
Step 5: again switch is closed after having cancelled stress or strain, at this moment voltage or current tester can record pulse output voltage in opposite direction or current value, repeat step 2 to the operation of step 5, the nano generator that can record circulation continuously exports stable voltage or current value, voltage described in real time record or current value versus time curve, i.e. obtain voltage or current value-time plot.
Further, described nano generator is piezoelectric nano electromotor or the friction nanometer power generator of principle based on piezoelectric effect, triboelectrification effect work.
Stress or strain are consequently exerted on nano generator and make it produce the mechanism of electricity output further, as external force makes piezoelectric nano electromotor deform upon, make to occur between friction generator frictional layer relative motion；Stress or strain rate i.e. stress or the speed of action of strain.
Further, described stress or strain can put on nano generator with any speed, and mode, path during applying it are not done and controlled.
Further, disconnecting and refer to be disconnected in the loop that nano generator and test instrunment are constituted by any way, Guan Bi refers to be connected in the loop that nano generator and test instrunment are constituted by any way.
The method of testing that this patent is proposed has the different of essence from traditional method.In traditional method, during applying or cancelling strain, test circuit be always maintained at being in UNICOM's state, this can cause the incipient stage that in circuit, electronics applies at stress or strain i.e. to be flowed, and has therefore had part electronics to migrate when stress or strain when not yet reaching end value.Although final stress or strain size are relevant to need the total electron amount migrated to depend on, owing to the applying of stress or strain always needs the regular hour, this makes the electronics that total amount is certain migrate within the different time, thus causes voltage (electric current) value recorded to be stressed or strain rate impact.In the method, owing to first test circuit being turned off state before changing at stress or strain, thus electronics cannot migrate during stress or strain apply, but the moment after concentrating on closing of circuit flow, this just can make the output voltage (electric current) recorded not affected by stress or strain rate.It should be noted that this method ratio in traditional method, although be embodied in the operation that with the addition of in good time disconnecting circuit on surface, but its based on principle be the capacitor character of nano generator, this is the brand-new understanding to nano generator operation principle.Having capacitor character just because of nano generator, during disconnecting circuit, electric charge remains to be saved in two electrodes of nano generator without running off.The nano generator output voltage (electric current) using this method to record has good Stability and veracity, as shown in Figure 3, the nano generator output electric current using tradition method to record is obviously reduced with the reduction of strain rate, and the nano generator using this method to record exports the impact of the most strained speed of electric current, and the maximum output limit that the output electric current recorded always records for traditional method.Output performance evaluation, the device parameters of nano generator are characterized and the great significance for design of related integrated device by this method.
Accompanying drawing explanation
Fig. 1 is that the present invention tests circuit diagram.
Fig. 2 testing procedure of the present invention schematic diagram.
Nano generator output current vs (a) this method (b) traditional method under the differently strained speed that Fig. 3 this method and traditional method record.
Detailed description of the invention
Below in conjunction with example, technical scheme is described in detail.Obviously, described example is only schematically, can not comprise the full content of the present invention.Those skilled in the art are changed the every other example obtained under the inspiration of the present invention, broadly fall into the scope of protection of the invention.
Embodiment 1:
(1) piezoelectric nano electromotor, voltage amplifier, switch series being unified into loop, voltage amplifier is connected with data acquisition unit, can real time record piezoelectric nano electromotor output voltage over time；
(2) first switch being turned off state, utilize counterweight vertically to apply 10Mpa stress to piezoelectric nano electromotor, the speed during stress applies can be that arbitrarily the real-time voltage that voltage amplifier records in the process is zero always；
(3) being closed by switch after having applied stress, at this moment voltage amplifier can record pulse output voltage in one direction；
(4) treating that the real-time voltage that voltage amplifier records returns back to zero again, switch is turned off state, is then cancelled by the stress applied, the speed cancelled can be any, and the real-time voltage that voltage amplifier records in the process is zero always；
(5) being closed by switch after having cancelled stress, at this moment voltage amplifier can record pulse output voltage in opposite direction；
(6) repeat (2)-(5) operation, the piezoelectric nano generator output voltage-time graph of circulation continuously can be recorded.
Embodiment 2:
(1) piezoelectric nano electromotor, current amplifier, switch series being unified into loop, current amplifier is connected with data acquisition unit, can real time record piezoelectric nano electromotor output electric current over time；
(2) first switch being turned off state, utilize afterburning equipment able to programme accurately to apply 5Mpa stress to piezoelectric nano electromotor, during stress applying, the movement rate of pressure head can be that arbitrarily the real-time current that current amplifier records in the process is zero always；
(3) being closed by switch after having applied stress, at this moment current amplifier can record pulse output circuit in one direction；
(4) treating that the real-time current that current amplifier records returns back to zero again, switch is turned off state, is then cancelled by the stress applied, the ram movement speed cancelling process can be that arbitrarily the real-time current that current amplifier records in the process is zero always；
(5) being closed by switch after having cancelled stress, at this moment current amplifier can record pulse output circuit in opposite direction；
(6) repeat (2)-(5) operation, the piezoelectric nano output generator current-time graph of circulation continuously can be recorded, as shown in Fig. 3 (a).
Embodiment 3:
(1) friction nanometer power generator, current amplifier, switch series being unified into loop, current amplifier is connected with data acquisition unit, can real time record piezoelectric nano electromotor output electric current over time；
(2) first switch being turned off state, make two frictional layers of friction nanometer power generator contact with each other friction, then two frictional layers separate and form relative displacement 1cm, and the speed of displacement can be any；
(3) being closed by switch after displacement completes, at this moment current amplifier can record pulse output circuit in one direction；
(4) treat that the real-time current that current amplifier records returns back to zero again, switch is turned off state, then the displacement between two frictional layers being returned back to zero, the rate of displacement of Recovery Process can be that arbitrarily the real-time current that current amplifier records in the process is zero always；
(5) being closed by switch after displacement returns back to zero, at this moment current amplifier can record pulse output circuit in opposite direction；
(6) repeat (2)-(5) operation, the friction nanometer power generator output current versus time curve of circulation continuously can be recorded.
Above embodiments of the invention are described in detail, but described content has been only presently preferred embodiments of the present invention, it is impossible to be considered the practical range for limiting the present invention.All impartial changes made according to the present patent application scope and improvement etc., within all should still belonging to the patent covering scope of the present invention.
Claims (3)
1. an accurate measurement nano generator output voltage or the method for electric current, it is characterized in that: the method is by before applying or cancel stress or strain, the test circuit being first connected with voltage or current tester by nano generator disconnects, after stress or strain applying complete, the moment of Guan Bi test circuit can record pulse output voltage or current value, can record nano generator output voltage or the current versus time curve of circulation continuously.
Method the most according to claim 1, it is characterised in that specifically including of the method is as follows:
Step 1: piezoelectric nano electromotor, voltage or current tester, switch series are unified into loop, voltage or current tester can the output voltage of real time record piezoelectric nano electromotor or electric current over time；
Step 2: first described switch is turned off state, the speed applied during quantitative stress or strain, stress or strain apply to nano generator can be that arbitrarily voltage or current tester record in the process real-time voltage or current value are zero always；
Step 3: by described switch Guan Bi after complete stress to be applied or strain, the most described voltage or current tester record pulse output voltage in one direction or current value；
Step 4: treat that real-time voltage that described voltage or current tester record or current value return back to zero again, again described switch is turned off state, then the stress applied or strain are cancelled, the speed cancelled can be any, and voltage or current tester record in the process real-time voltage or electric current are zero；
Step 5: again switch is closed after having cancelled stress or strain, at this moment voltage or current tester can record pulse output voltage in opposite direction or current value, repeat step 2 to the operation of step 5, the nano generator that can record circulation continuously exports stable voltage or current value, voltage described in real time record or current value versus time curve, i.e. obtain voltage or current value-time plot.
3. nano generator as claimed in claim 1, it is characterised in that: described nano generator is piezoelectric nano electromotor or the friction nanometer power generator of principle based on piezoelectric effect, triboelectrification effect work.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732420A (en) * | 2017-04-14 | 2018-11-02 | 纳智源科技（唐山）有限责任公司 | Friction generator exports the computational methods of electric energy, apparatus and system |
| CN112240977A (en) * | 2019-07-17 | 2021-01-19 | 香港中文大学 | Method for measuring effective maximum energy output of nano generator and data processing method |
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| US20090179523A1 (en) * | 2007-06-08 | 2009-07-16 | Georgia Tech Research Corporation | Self-activated nanoscale piezoelectric motion sensor |
| CN103354433A (en) * | 2013-02-22 | 2013-10-16 | 国家纳米科学中心 | Spring type nanometer generator and self-driven dynamometer |
| CN103354240A (en) * | 2012-11-13 | 2013-10-16 | 国家纳米科学中心 | Combined nanometer generator and preparation method thereof |
| CN103364444A (en) * | 2013-03-25 | 2013-10-23 | 国家纳米科学中心 | Method for gas detection by utilizing nanogenerator based on nano-piezoelectric semiconductor materials |
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- 2016-03-28 CN CN201610184286.2A patent/CN105823919B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090179523A1 (en) * | 2007-06-08 | 2009-07-16 | Georgia Tech Research Corporation | Self-activated nanoscale piezoelectric motion sensor |
| CN103354240A (en) * | 2012-11-13 | 2013-10-16 | 国家纳米科学中心 | Combined nanometer generator and preparation method thereof |
| CN103354433A (en) * | 2013-02-22 | 2013-10-16 | 国家纳米科学中心 | Spring type nanometer generator and self-driven dynamometer |
| CN103364444A (en) * | 2013-03-25 | 2013-10-23 | 国家纳米科学中心 | Method for gas detection by utilizing nanogenerator based on nano-piezoelectric semiconductor materials |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108732420A (en) * | 2017-04-14 | 2018-11-02 | 纳智源科技（唐山）有限责任公司 | Friction generator exports the computational methods of electric energy, apparatus and system |
| CN112240977A (en) * | 2019-07-17 | 2021-01-19 | 香港中文大学 | Method for measuring effective maximum energy output of nano generator and data processing method |
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