CN111190490B - Low-cost electromagnetic induction type tactile feedback system - Google Patents
Low-cost electromagnetic induction type tactile feedback system Download PDFInfo
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- CN111190490B CN111190490B CN201911414743.2A CN201911414743A CN111190490B CN 111190490 B CN111190490 B CN 111190490B CN 201911414743 A CN201911414743 A CN 201911414743A CN 111190490 B CN111190490 B CN 111190490B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
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Abstract
The invention relates to the technical field of tactile feedback, in particular to a low-cost electromagnetic induction type tactile feedback system, which comprises: a first mounting surface; the first coil is bonded on the bottom end face of the first mounting surface and is a transverse coil; a haptic feedback actuator disposed on a bottom side of the first coil, the coil of the haptic feedback actuator being in a longitudinal direction; the second installation surface is arranged on the bottom side of the first coil and is not in contact with the first installation surface, the touch feedback exciter is adhered to the bottom end surface of the second installation surface, the distance between the first coil and the coil of the touch feedback exciter is 0.3-0.5mm, the operational amplification module is connected with the digital signal processing module, the digital signal processing module is connected with the power amplification module, the motion amplification module is connected with the coil of the touch feedback exciter, the touch feedback function is realized through the coil mutual inductance principle, and compared with the existing resistor screen and capacitor screen technologies, the realization is simpler and more convenient and cheaper.
Description
Technical Field
The invention relates to the technical field of tactile feedback, in particular to a low-cost electromagnetic induction type tactile feedback system.
Background
The touch feedback technology in the market is widely applied, but at present, a trigger signal works by utilizing current induction of a human body through a capacitive touch panel CTP, although the capacitive touch panel has mature process and wide application range, the cost of the capacitive touch panel is higher, the current market is competitive, cost reduction becomes a necessary trend, and moreover, when people use gloves to drive, touch a capacitive switch or navigate, the capacitive technology is not applicable any more. In order to meet the market demand and solve the problems, the inventor researches and develops a low-cost electromagnetic induction type tactile feedback system.
Disclosure of Invention
The invention aims to solve the technical problem of providing a low-cost electromagnetic induction type touch feedback system, which realizes the touch feedback function by the coil mutual inductance principle, and is simpler and cheaper to realize compared with the prior resistor screen and capacitor screen technologies.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a low-cost electromagnetic induction type tactile feedback system comprises
A first mounting surface for contact pressing;
the first coil is bonded on the bottom end surface of the first mounting surface and generates a magnetic field, and the first coil is a transverse coil;
a haptic feedback actuator disposed at a bottom side of the first coil for generating induced electromotive force, the coil of the haptic feedback actuator being in a longitudinal direction;
a second mounting surface arranged at the bottom side of the first coil and not in contact with the first mounting surface, a tactile feedback actuator adhered to the bottom end surface of the second mounting surface, the distance between the first coil and the coil of the tactile feedback actuator being 0.3-0.5mm,
the operation amplification module is connected with the digital signal processing module, the digital signal processing module is connected with the power amplification module, the operation amplification module is connected with a coil of the touch feedback exciter, the operation amplification module amplifies induced electromotive force of the touch feedback exciter to trigger the digital signal processing module, the digital signal processing module triggers the power amplification module, and the power amplification module drives the touch feedback exciter to work to generate vibration.
Preferably, the distance between the first coil and the coil of the tactile feedback actuator is 0.4 mm.
Preferably, the first coil is externally connected with a signal generation module, and the signal generation module provides 200000Hz and 2V sine wave signals for the first coil.
Preferably, the operational amplifier module is an operational amplifier,
preferably, the digital signal processing module is a DSP.
Preferably, the power amplification module is a power amplifier.
The invention has the beneficial effects that: adopt above-mentioned scheme, through circular telegram coil mutual inductance principle, alternating magnetic field through circular telegram first coil production is inducted by the coil in the touch feedback exciter, the principle cost greatly reduced who utilizes the human electric current that produces of the principle replacement of present used electric capacity technique of producing weak voltage, apply to under the on-vehicle touch panel button, realize the touch feedback function, compare in present resistive screen, electric capacity screen technique, it is more simple and convenient to realize, it is cheaper, and be fit for applying to other fields that need touch vibrations feedback.
Drawings
The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic representation of the mutual inductance of the first coil and the coil arrangement of the haptic feedback actuator in one embodiment of the present invention.
FIG. 3 is a graph illustrating the induced electromotive force variation in the coil of the haptic feedback actuator in accordance with one embodiment of the present invention.
FIG. 4 is a graph of the difference in induced voltage in the coil of the haptic feedback actuator relative to the non-depressed induced electromotive force after a change in the position of the first coil and the coil of the haptic feedback actuator in one embodiment of the present invention.
Wherein: 1 is a first mounting surface, 2 is a first coil, 21 is a signal generating module, 3 is a tactile feedback exciter, 31 is a coil of the tactile feedback exciter, 4 is a second mounting surface, 5 is an operational amplifier chip, 6 is a DSP, and 7 is a power amplifier chip.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a low cost electromagnetic induction haptic feedback system includes: a first mounting surface 1 for contact pressing and generating a pressing signal and fixing a plate tactile feedback system, a first coil 2 adhered to the bottom end surface of the first mounting surface 1 for generating a magnetic field, the first coil 2 being a transverse coil, the axis of the first coil 2 being parallel to a horizontal straight line, a tactile feedback actuator 3 disposed at the bottom side of the first coil 2 for generating an induced electromotive force, the coil 31 of the tactile feedback actuator being in the longitudinal direction, i.e., the axis of the coil 31 of the tactile feedback actuator being parallel to the vertical direction, a second mounting surface 4 disposed at the bottom side of the first coil 2 and not in contact with the first mounting surface 2, the tactile feedback actuator 3 adhered to the bottom end surface of the second mounting surface 4, the space between the first coil 2 and the coil 31 of the tactile feedback actuator being 0.4mm, and a control circuit having an operational amplifier chip 5, DSP6, power amplifier chip 7, operational amplifier chip 5, DSP6, power amplifier chip 7 are connected in series in control circuit in proper order, the input of amplifier chip 5 passes through control circuit and connects coil 31 of tactile feedback exciter, amplifier chip 5 is used for receiving the induced electromotive force signal of tactile feedback exciter, first coil 2 external signal generation module 21, signal generation module is alternating current power supply, signal generation module provides 200000Hz, 2V's alternating current sine wave signal for first coil 2, the bottom side outside of first installation face can set up support or housing, support or housing float-supported second installation face, the inner wall of support or housing can set up the branch claw and connect second installation face and support, when first coil 2 under first installation face 1 lets in alternating current, when sine wave signal, first coil produces the magnetic field, according to the mutual induction principle of twin coil after first coil 2 lets in alternating current at the coil of tactile feedback exciter 31, the induced electromotive force generated at this time is weak and is not enough to be captured by the DSP6, the induced electromotive force generated in the coil 31 of the haptic feedback actuator changes due to the downward pressing from the upper part of the first mounting surface 1, the generated induced voltage also changes due to the different pressing force degrees of each person, the action of the operational amplifier chip 5 of the control circuit is to amplify the induced electromotive force generated in the coil 31 of the haptic feedback actuator to be captured by the DSP6 to trigger the DSP, after the DSP is triggered, the DSP generates a driving signal to trigger the power amplifier chip 7 to drive the haptic feedback actuator to work, the haptic feedback actuator generates vibration, the first mounting surface generates vibration to be sensed by the person to be pressed, the first mounting surface is pressed downward to reduce the relative positions of the coils, the induction electromotive force of the coil of the tactile feedback exciter is raised due to the change of the mutual inductance coefficient, meanwhile, the voltage in the coil of the tactile feedback exciter is interactively changed and fed back to the first coil, induction voltage can be generated, and cross influence is further formed, weak induction voltage is generated by the coil of the tactile feedback exciter due to the interaction between magnetic fields, an operational amplifier chip can amplify and feed back the signal to a control circuit, the voltage is different due to different force ways of pressing people, when the pressing force way is higher than a certain value, namely the distance between the two coils is reduced to a certain degree, the induction electromotive force is enough to trigger a DSP signal to form vibration feedback, through the principle of electrifying the mutual inductance coil, the alternating magnetic field generated by electrifying the first coil is induced by the coil in the tactile feedback exciter, the principle of generating weak voltage replaces the current principle of the existing capacitance technology and utilizing the current generated by a human body, and the cost is greatly reduced, the feedback system is suitable for being applied to a plurality of fields, simple in structure, convenient to produce and manufacture and low in use cost.
The operational amplifier chip can adopt RS 358S, DSP and TMS320C1X/C2X, the power amplifier chip can adopt lm324ad, the size of the induced electromotive force of the coil of the tactile feedback exciter depends on the number of turns of the coil, the geometric dimension, the relative position of the two coils and the like, the induced electromotive force of the tactile feedback exciter is amplified to trigger the digital signal processing module, the digital signal processing module triggers the power amplification module, the power amplification module drives the tactile feedback exciter to work to generate vibration, the vibration control method can be adjusted according to actual needs, the applicability is good, and the requirements of multiple fields on tactile vibration feedback can be met.
The working principle of the embodiment is as follows:
the first coil is 0.4mm away from the coil of the tactile feedback exciter, when alternating voltage 2V is applied to two ends of the first coil, a changing electric field excites a magnetic field, induced electromotive force is generated in the coil of the tactile feedback exciter, and the magnetic field generated by the first coil is as follows:
wherein mu0Is the magnetic constant, n1Is the first number of turns of the coil, I1Is the current in the first coil, R1Is the radius of the first coil, Z is the displacement from the center point of the first coil, in the coils of the haptic feedback actuatorThe induced voltage is:
wherein n is2Is the number of turns of the coil of the haptic feedback actuator, S2The sectional area of the coil of the tactile feedback exciter is determined, and the electromagnetic field is solved by adopting Maxwell equation set:
wherein H is the magnetic field strength, B is the magnetic induction strength, J is the current density, E is the electric field strength, the coil induced electromotive force of the haptic feedback actuator is obtained by solving, as shown in fig. 3, the induced electromotive force in the coil of the haptic feedback actuator changes, after the first mounting surface is pressed, the distance between the first coil and the coil of the haptic feedback actuator changes, referring to fig. 4, the curve in the figure is the difference curve of the induced electromotive force in the coil of the haptic feedback actuator relative to the non-pressed induced electromotive force after the positions of the first coil and the coil of the haptic feedback actuator change, it can be seen from fig. 4 that the voltage difference value changes in proportion to the position change, when the induced electromotive force reaches a certain value after being amplified, the DSP signal is triggered, the haptic feedback actuator can be driven to work, so that the first mounting surface generates vibration, and is perceived by the pressed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiment according to the present invention are within the scope of the present invention.
Claims (3)
1. A low-cost electromagnetic induction haptic feedback system, comprising: the first mounting surface is used for contact pressing; the first coil is bonded on the bottom end surface of the first mounting surface and generates a magnetic field, and the first coil is a transverse coil; a haptic feedback actuator disposed at a bottom side of the first coil for generating induced electromotive force, the coil of the haptic feedback actuator being in a longitudinal direction; the second mounting surface is arranged on the bottom side of the first coil and is not in contact with the first mounting surface, the touch feedback exciter is adhered to the bottom end surface of the second mounting surface, the distance between the first coil and the coil of the touch feedback exciter is 0.3-0.5mm, the operational amplification module is connected with the digital signal processing module, the digital signal processing module is connected with the power amplification module, the operational amplification module is connected with the coil of the touch feedback exciter, the operational amplification module amplifies the induced electromotive force of the touch feedback exciter to trigger the digital signal processing module, the digital signal processing module triggers the power amplification module, and the power amplification module drives the touch feedback exciter to work to generate vibration; the digital signal processing module is a DSP; the operational amplification module is an operational amplifier; the power amplification module is a power amplifier;
when alternating current, namely a sine wave signal, is introduced into a first coil under a first mounting surface, the first coil generates a magnetic field, the first coil generates induced electromotive force in a coil of a tactile feedback exciter after the alternating current is introduced into the first coil according to a double-coil mutual induction principle, the generated induced electromotive force is not enough to be captured by a DSP (6), the first coil is pressed downwards from the upper part of the first mounting surface, so that the relative position of the first coil and the coil of the tactile feedback exciter changes, the induced electromotive force in the coil of the tactile feedback exciter changes, the generated induced voltage is different due to different pressing force degrees of each person, and an operational amplifier chip of a control circuit has the function of carrying out operational amplification on the induced electromotive force generated by the coil of the tactile feedback exciter to the extent that the induced electromotive force can be captured by the DSP (6) to trigger the DSP, and the DSP generates a driving signal after being triggered, the driving signal triggers the power amplifier chip to drive the touch feedback exciter to work, the touch feedback exciter generates vibration, and the first mounting surface generates vibration to be sensed by a person to be pressed.
2. A low cost electromagnetic induction haptic feedback system as recited in claim 1, wherein: the distance between the first coil and the coil of the tactile feedback exciter is 0.4 mm.
3. A low cost electromagnetic induction haptic feedback system as recited in claim 1, wherein: the first coil is externally connected with a signal generation module, and the signal generation module provides 200000Hz and 2V sine wave signals for the first coil.
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| CN201911414743.2A CN111190490B (en) | 2019-12-31 | 2019-12-31 | Low-cost electromagnetic induction type tactile feedback system |
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| CN111897421B (en) * | 2020-07-14 | 2021-08-03 | 武汉大学 | Electromagnetic type touch reappearance system and method and magnetic field prediction control method |
| CN112130665B (en) * | 2020-09-16 | 2024-02-02 | 汉得利（常州）电子股份有限公司 | Haptic feedback method and device with uniform vibration sense |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104169851A (en) * | 2012-02-06 | 2014-11-26 | 卡纳图有限公司 | Touch sensing device and detection method |
| CN105786180A (en) * | 2009-12-10 | 2016-07-20 | 苹果公司 | Touch pad with force sensors and actuator feedback |
| CN109819383A (en) * | 2019-01-30 | 2019-05-28 | 汉得利（常州）电子股份有限公司 | A kind of twin shaft solid vibration sense touch feedback driver |
| CN109828667A (en) * | 2019-01-30 | 2019-05-31 | 汉得利（常州）电子股份有限公司 | A kind of nine magnetic high drive low noise touch feedback drivers |
| CN110597394A (en) * | 2019-09-19 | 2019-12-20 | 厦门盈趣科技股份有限公司 | Touch vibration feedback device and vibration method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016122977B4 (en) * | 2016-11-29 | 2021-09-02 | Preh Gmbh | Operating device with several operating assemblies and haptic feedback as well as method for manufacturing the operating device |
| DE102016122978B4 (en) * | 2016-11-29 | 2020-06-10 | Preh Gmbh | Method and arrangement for producing an operating device with haptic feedback |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105786180A (en) * | 2009-12-10 | 2016-07-20 | 苹果公司 | Touch pad with force sensors and actuator feedback |
| CN104169851A (en) * | 2012-02-06 | 2014-11-26 | 卡纳图有限公司 | Touch sensing device and detection method |
| CN109819383A (en) * | 2019-01-30 | 2019-05-28 | 汉得利（常州）电子股份有限公司 | A kind of twin shaft solid vibration sense touch feedback driver |
| CN109828667A (en) * | 2019-01-30 | 2019-05-31 | 汉得利（常州）电子股份有限公司 | A kind of nine magnetic high drive low noise touch feedback drivers |
| CN110597394A (en) * | 2019-09-19 | 2019-12-20 | 厦门盈趣科技股份有限公司 | Touch vibration feedback device and vibration method |
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