CN112129329A - Friction electric signal acquisition device - Google Patents
Friction electric signal acquisition device Download PDFInfo
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- CN112129329A CN112129329A CN202011098786.7A CN202011098786A CN112129329A CN 112129329 A CN112129329 A CN 112129329A CN 202011098786 A CN202011098786 A CN 202011098786A CN 112129329 A CN112129329 A CN 112129329A
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- operational amplifier
- port
- amplifier chip
- resistor
- voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/242—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by carrying output of an electrodynamic device, e.g. a tachodynamo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H5/00—One-port networks comprising only passive electrical elements as network components
- H03H5/12—One-port networks comprising only passive electrical elements as network components with at least one voltage- or current-dependent element
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a friction electric signal acquisition device, which has two schemes: the first scheme comprises two operational amplifier chips, a lithium battery and a low-pass filter circuit, and adopts the principle of virtual short and virtual disconnection of an operational amplifier, a current signal generated by the triboelectricity generating device is input into a circuit constructed by the two operational amplifier chips, and because the resistance of the input end of the operational amplifier chip is close to infinity, the current signal generated by the triboelectricity generating device can be output through the operational amplifier chips in the original state, and the accuracy can reach more than 95%; the second scheme includes that chip, SMA antenna, lithium cell and voltage stabilizing module are put to fortune, adopts the voltage follower principle, and the current signal that triboelectric generating device produced is inputed to the circuit that chip was put to fortune was built, because the input resistance of chip is put to fortune is close infinity, therefore the voltage signal that triboelectric generating device produced can be the former state through the chip output to the robot is put to fortune, and the robot can accurately catch the signal, produces corresponding action.
Description
Technical Field
The invention relates to a signal acquisition device, in particular to a friction electric signal acquisition device.
Background
With the continuous progress of society, portable electronic devices have gradually advanced into people's lives and greatly changed people's life style, and the technology of sensors serving the portable electronic devices is also continuously developed (such as motion sensors, attitude sensors, life jacket alarm systems). Conventional sensors are limited to electronics and packaging materials and are often not deformable. The proposal of the sensor based on the triboelectric signal opens up a new path for the development of the self-powered sensor, and the research on various energy recovery scenes such as human motion, wind energy, sound wave energy, ocean energy and the like is carried out. The triboelectricity generating device is used as a sensing element and is packaged in a flexible film, so that the flexible mechanical sensor can be manufactured. The output current and voltage are collected by sufficiently sensitive collecting equipment, and the obtained signals can represent various mechanical parameters and action frequencies applied to the material. Many groups are studying the use of triboelectric generating devices for sensing physical quantities such as pressure, flow rate, etc. Meanwhile, the triboelectric signal generated by the triboelectric generating device is also used as a trigger signal and is applied to occasions such as medical treatment, entertainment and the like.
However, the acquisition of triboelectric signals has been a problem. The triboelectricity generating device has the characteristics of large voltage, small current and large internal resistance, and the traditional signal acquisition device cannot accurately acquire the triboelectricity generating device due to the fact that the triboelectricity generating device is too large, and the acquisition error can reach more than 50%. Special signal acquisition circuits need to be designed to address this problem.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a friction electric signal collecting device capable of improving the accuracy of signal collection.
In order to achieve the above object, a first aspect of the present invention is as follows: a friction electric signal acquisition device comprises two operational amplifier chips, a lithium battery and a low-pass filter circuit; the two operational amplifier chips are respectively an operational amplifier chip A and an operational amplifier chip B, and both the two operational amplifier chips are LMC6001 operational amplifier chips;
the input IN-port 2 of the operational amplifier chip A is connected with the triboelectric generating device, and the input IN-port 2 of the operational amplifier chip A passes through the feedback resistor RbThe output port 6 of the operational amplifier chip A is connected with the input IN-port 3 of the operational amplifier chip B through a resistor R3, and a resistor R3 is grounded through a resistor R4; the IN + port 3 of the operational amplifier chip A is grounded;
an output port IN-2 of the operational amplifier chip B is respectively connected with a reference voltage battery through a resistor R1 and is connected with an output port 6 of the operational amplifier chip B through a resistor R2, power supply ports 7 and 4 of the operational amplifier chip B are respectively connected with the positive electrode and the negative electrode of the lithium battery, and the output port 6 of the operational amplifier chip B is simultaneously connected with the low-pass filter circuit;
the low-pass filter circuit comprises resistors R5 and R6 and capacitors C1 and C2, one end of the resistor R5 is connected with the output port 6 of the operational amplifier chip B, and the other end of the resistor R5 is divided into two paths: one path is grounded through a capacitor C1, and the other path is connected with one end of a resistor R6; the other end of the resistor R6 is divided into two paths: one path is grounded through a capacitor C2, and the other path is used as an output end to be connected with an upper computer.
Further, the feedback resistor RbThe voltage of the lithium battery is 1-2M, R1-R2-R3-R4-10 k, R5-R6-10 k, C1-C2-0.1 muF, and the voltage of the lithium battery is +/-6V.
The second technical scheme of the invention is as follows: a friction electric signal acquisition device comprises an operational amplifier chip, an SMA antenna, a lithium battery and a voltage stabilizing module; the operational amplifier chip is an LMC324 operational amplifier chip; the voltage stabilizing module is an AMS1117 voltage stabilizing module;
an input IN +1 port 3 of the operational amplifier chip is connected with the triboelectric generating device through a resistor R1, a port 1 of the SMAWIFI antenna interface and the SMA antenna IN sequence; the IN-1 port of the operational amplifier chip is connected with the OUT1 port of the operational amplifier chip through a resistor R2, and meanwhile, the OUT1 port leads output signals to an upper computer; the port 4 of the operational amplifier chip is connected with the port 2 of the voltage stabilizing module; a port 11 of the operational amplifier chip is connected with a port 3 of the SMAWIFI antenna interface;
the port 1 of the voltage stabilizing module is grounded, and the port 3 of the voltage stabilizing module is connected with the port 2 of the SMAWIFI antenna interface through a lithium battery.
Further, the voltage of the lithium battery is ± 4.5V when R1 is 1M when R2 is 1M.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the first scheme, the principle of virtual short and virtual disconnection of the operational amplifier is adopted, the current signal generated by the triboelectricity generating device is input into a circuit built by two operational amplifier chips, and the resistance of the input end of each operational amplifier chip is close to infinity, so that the current signal generated by the triboelectricity generating device can be output through the operational amplifier chips in the original state, and the accuracy can reach more than 95%.
2. According to the second scheme, the voltage follower principle is adopted, the current signal generated by the triboelectricity generating device is input into a circuit built by the operational amplifier chip, and the resistance of the input end of the operational amplifier chip is close to infinity, so that the voltage signal generated by the triboelectricity generating device can be output to the robot through the operational amplifier chip in the original state, and the robot can accurately capture the signal to generate corresponding actions.
Drawings
Fig. 1 is a circuit schematic of a first aspect of the invention.
Fig. 2 is a circuit schematic of a second aspect of the invention.
FIG. 3 is a circuit simulation diagram of a first embodiment of the present invention.
Fig. 4 is a circuit simulation schematic diagram of a second scheme in the invention.
Fig. 5 is a schematic diagram of the application of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 5, the first scheme of the present invention operates as follows:
the triboelectricity generating device can be used in wearable sportswear, and the human motion posture can be monitored in real time according to the swing amplitude of the wearable sportswear and the current signal generated by the triboelectricity generating device. The triboelectric generating device can generate a weak alternating current signal of 50V and 1uA, and the signal can be collected and utilized by the collecting device.
The triboelectric generating device generates a triboelectric signal through swinging, and the operational amplifier chip A generates a triboelectric signal according to the feedback resistance RbThe magnitude of the current signal generated by the flexible friction nano generator is according to the following formula:
Vout1＝RbIin
can generate a tiny current signal I by the triboelectricity generating deviceinConverted into a voltage signal Vout1The converted voltage signal is input into an operational amplifier chip B through an output port 6 of the operational amplifier chip A, the operational amplifier chip B constructs a subtracter, and the subtracter is formed according to the virtual short and virtual break characteristics of the operational amplifier chip by the following two formulas:
Vout1-V＝V
Vref-V＝V-Vout2
the following equations are derived simultaneously:
Vout2＝Vout1-Vref
will voltage Vout2Promote to 3.3V, output 6 links to each other with low pass filter circuit in the chip B is put to the fortune, through resistance R5, R6 and electric capacity C1, C2, can filter the noise more than 20Hz, obtains the voltage waveform that the triboelectric generating device produced, and the host computer is through gathering the voltage waveform that the triboelectric generating device produced, judges the swing state of triboelectric generating device to carry out real-time supervision to the state of triboelectric generating device. Wherein VrefThe reference voltage provided for the reference voltage battery, V is the voltage to ground between the resistors R3 and R4, and according to the principle of virtual short and virtual break of the operational amplifier, it can be obtained that the voltage to ground between the resistors R1 and R2 is also V.
The actual effect of the waveform generated by the signal acquisition device of the invention is shown in fig. 3 by a software multisim simulation effect waveform diagram, and a 1uA current signal can be converted into a 3.3V voltage sinusoidal signal.
As shown in fig. 2 and 5, the second scheme of the present invention works as follows: the triboelectricity generating device can be applied to the robot, and when the robot touches an object and the triboelectricity generating device generates a voltage signal, a steering instruction can be given to the robot.
The triboelectric generating device is connected to an input IN +1 port 3 of an operational amplifier chip through an SMAWIFI antenna interface, a voltage signal of the triboelectric generating device is input into the operational amplifier chip, meanwhile, an output is led OUT from an OUT1 port, and according to the characteristics of the operational amplifier chip, the triboelectric generating device is formed by the following formula:
wherein VinFor input of voltage, V, to triboelectric generating meansoutOutputting a voltage for the circuit.
To obtain Vin＝VoutIt can be seen that the operational amplifier chip can output the signal generated by the triboelectric generator as it is. Because the withstand voltage of the operational amplifier chip is more than 60V, the operational amplifier chip can bear the large voltage generated by the triboelectricity generating device, and because of the characteristics of the operational amplifier chip, the output voltage cannot exceed the power supply voltage, the irregular and disorderly voltage signals generated by the triboelectricity generating device can be changed into regular voltage pulse signals through the circuit, and therefore the upper computer is used for controlling controllable machines such as a robot and the like.
The actual effect of the waveform generated by the signal acquisition device of the invention is shown in fig. 4 by a software multisim simulation effect oscillogram, and a large voltage signal generated by the friction nanometer device can be converted into a 3.3V reverse pulse signal.
The present invention is not limited to the embodiment, and any equivalent idea or change within the technical scope of the present invention is to be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides a friction electricity signal pickup assembly which characterized in that: the circuit comprises two operational amplifier chips, a lithium battery and a low-pass filter circuit; the two operational amplifier chips are respectively an operational amplifier chip A and an operational amplifier chip B, and both the two operational amplifier chips are LMC6001 operational amplifier chips;
the input IN-port 2 of the operational amplifier chip A is connected with the triboelectric generating device, and the input IN-port 2 of the operational amplifier chip A passes through the feedback resistor RbThe output port 6 of the operational amplifier chip A is connected with the input IN-port 3 of the operational amplifier chip B through a resistor R3, and a resistor R3 is grounded through a resistor R4; the IN + port 3 of the operational amplifier chip A is grounded;
an output port IN-2 of the operational amplifier chip B is respectively connected with a reference voltage battery through a resistor R1 and is connected with an output port 6 of the operational amplifier chip B through a resistor R2, power supply ports 7 and 4 of the operational amplifier chip B are respectively connected with the positive electrode and the negative electrode of the lithium battery, and the output port 6 of the operational amplifier chip B is simultaneously connected with the low-pass filter circuit;
the low-pass filter circuit comprises resistors R5 and R6 and capacitors C1 and C2, one end of the resistor R5 is connected with the output port 6 of the operational amplifier chip B, and the other end of the resistor R5 is divided into two paths: one path is grounded through a capacitor C1, and the other path is connected with one end of a resistor R6; the other end of the resistor R6 is divided into two paths: one path is grounded through a capacitor C2, and the other path is used as an output end to be connected with an upper computer.
2. A triboelectric signal pickup device according to claim 1, wherein: the feedback resistor nbThe voltage of the lithium battery is 1-2M, R1-R2-R3-R4-10 k, R5-R6-10 k, C1-C2-0.1 muF, and the voltage of the lithium battery is +/-6V.
3. The utility model provides a friction electricity signal pickup assembly which characterized in that: the device comprises an operational amplifier chip, an SMA antenna, a lithium battery and a voltage stabilizing module; the operational amplifier chip is an LMC324 operational amplifier chip; the voltage stabilizing module is an AMS1117 voltage stabilizing module;
an input IN +1 port 3 of the operational amplifier chip is connected with the frictional electricity generating device through a resistor R1, a port 1 of the SMA WIFI antenna interface and the SMA antenna IN sequence; the IN-1 port of the operational amplifier chip is connected with the OUT1 port of the operational amplifier chip through a resistor R2, and meanwhile, the OUT1 port leads output signals to an upper computer; the port 4 of the operational amplifier chip is connected with the port 2 of the voltage stabilizing module; the port 11 of the operational amplifier chip is connected with the port 3 of the SMA WIFI antenna interface;
the port 1 of the voltage stabilizing module is grounded, and the port 3 of the voltage stabilizing module is connected with the port 2 of the SMA WIFI antenna interface through a lithium battery.
4. A triboelectric signal pickup device according to claim 3, wherein: the voltage of the lithium battery is +/-4.5V, and the R1-R2-1M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011098786.7A CN112129329A (en) | 2020-10-14 | 2020-10-14 | Friction electric signal acquisition device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011098786.7A CN112129329A (en) | 2020-10-14 | 2020-10-14 | Friction electric signal acquisition device |
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| CN112129329A true CN112129329A (en) | 2020-12-25 |
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| CN202011098786.7A Pending CN112129329A (en) | 2020-10-14 | 2020-10-14 | Friction electric signal acquisition device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113271033A (en) * | 2021-05-28 | 2021-08-17 | 南京邮电大学 | Novel friction nano generator filtering device |
| CN113341213A (en) * | 2021-06-11 | 2021-09-03 | 重庆大学 | Single-power-supply portable friction nano generator sensor |
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| CN201210058Y (en) * | 2008-06-06 | 2009-03-18 | 秦一涛 | Weak current and voltage conversion circuit |
| CN207585642U (en) * | 2017-11-29 | 2018-07-06 | 合肥国轩高科动力能源有限公司 | A kind of hall signal detection transmission module based on optical fiber transceiving |
| CN108400864A (en) * | 2018-05-17 | 2018-08-14 | 佛山科学技术学院 | A kind of more wing chaos signal generators of fractional order |
| CN210952862U (en) * | 2019-10-18 | 2020-07-07 | 十堰车仪电子科技有限公司 | Automobile resistor or voltage type sensor signal acquisition protection circuit |
| CN111579052A (en) * | 2020-05-21 | 2020-08-25 | 大连海事大学 | Marine vibration monitoring and early warning device |
-
2020
- 2020-10-14 CN CN202011098786.7A patent/CN112129329A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201210058Y (en) * | 2008-06-06 | 2009-03-18 | 秦一涛 | Weak current and voltage conversion circuit |
| CN207585642U (en) * | 2017-11-29 | 2018-07-06 | 合肥国轩高科动力能源有限公司 | A kind of hall signal detection transmission module based on optical fiber transceiving |
| CN108400864A (en) * | 2018-05-17 | 2018-08-14 | 佛山科学技术学院 | A kind of more wing chaos signal generators of fractional order |
| CN210952862U (en) * | 2019-10-18 | 2020-07-07 | 十堰车仪电子科技有限公司 | Automobile resistor or voltage type sensor signal acquisition protection circuit |
| CN111579052A (en) * | 2020-05-21 | 2020-08-25 | 大连海事大学 | Marine vibration monitoring and early warning device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113271033A (en) * | 2021-05-28 | 2021-08-17 | 南京邮电大学 | Novel friction nano generator filtering device |
| CN113271033B (en) * | 2021-05-28 | 2022-07-26 | 南京邮电大学 | Novel friction nano generator filtering device |
| CN113341213A (en) * | 2021-06-11 | 2021-09-03 | 重庆大学 | Single-power-supply portable friction nano generator sensor |
| CN113341213B (en) * | 2021-06-11 | 2024-04-26 | 重庆大学 | Portable friction nano generator sensor powered by single power supply |
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Application publication date: 20201225 |
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