Non-physical contact multi-dimensional information fusion intelligent gesture password lock

Abstract

The application relates to a non-physical contact multi-dimensional information fusion intelligent gesture password lock. Specifically, the application comprises a single-electrode friction nanogenerator, a signal processing unit, a battery, a microcontroller unit and an unlocking effect display unit. A user inputs a non-contact gesture by using a dielectric / electret, and according to the electrostatic induction principle, electrostatic signals can be collected on the electrode layer, that is, S-TENG generates an electric output, and each S-TENG corresponds to a signal channel. Under the power supply of the battery, the signal processing unit processes the electric output signal generated by the S-TENG. The microcontroller unit reads the processing result of the signal processing unit and judges the gesture by using an internal program, then controls the unlocking effect display unit according to the gesture judgment result, and finally the unlocking effect display unit demonstrates the corresponding effect.

Description

Technical Field

[0001] This invention relates to the fields of energy conversion, signal processing, and gesture recognition, and specifically to a non-physical contact, multi-dimensional information fusion smart gesture combination lock. Background Technology

[0002] With the rapid development of the Internet of Things and smart electronic devices, portability and security have become two key qualities pursued by electronic products in the new era. Chinese invention patent CN201811346560.7 proposes a universal non-contact gesture recognition device based on a metal surface. This device uses a capacitive non-contact sensor, which can realize static and dynamic three-dimensional spatial gestures through training on user gesture data. While the capacitive sensor has a simple structure and principle, it requires training on user data to achieve gesture recognition, making the application method complex and costly. Chinese invention patent CN202111194277.9 proposes a non-contact gesture control method and electronic device. The electronic device includes at least one speaker and microphone. The speaker emits an autocorrelation ultrasonic signal, and the microphone collects the reflected signal after the ultrasonic signal encounters a non-contact gesture. The reflected signal is then used to control the target application to respond to the non-contact gesture. This non-contact gesture control method relies on the acquisition and recognition of reflected ultrasonic signals, making it highly susceptible to environmental interference and difficult to guarantee stability. Summary of the Invention

[0003] This invention provides a non-physical contact multi-dimensional information fusion smart gesture combination lock, specifically comprising a single-electrode triboelectric nanogenerator (S-TENG), a signal processing unit, a battery, a microcontroller unit, and an unlocking effect display unit. Further, the single-electrode triboelectric nanogenerator includes a freely movable dielectric / electret and an electrode layer for collecting gesture password signals; the signal processing unit is electrically connected to the single-electrode triboelectric nanogenerator and mainly includes a signal processing-wake-up circuit; the battery is a commercially available 3V button cell battery used to power the signal processing unit; the microcontroller unit mainly includes a microcontroller (MCU) used to identify the state of the signal processing unit and control the demonstration effect of the unlocking effect display unit, with its input terminal electrically connected to the signal processing unit and its output terminal electrically connected to the unlocking effect display unit. The logical relationship between the units of this non-physical contact multi-dimensional information fusion smart gesture combination lock is shown in the appendix. Figure 1 .

[0004] This invention provides a non-physical contact multi-dimensional information fusion smart gesture lock that uses both the triggering sequence and triggering interval information of the channel as judgment criteria to achieve smart gesture recognition in non-contact mode. The working principle of this invention's non-physical contact multi-dimensional information fusion smart gesture lock is as follows: The user inputs a non-contact gesture using a dielectric / electret. Based on the principle of electrostatic induction, electrostatic signals can be collected on the electrode layer, i.e., the S-TENG generates an electrical output, with each S-TENG corresponding to a signal channel. Powered by a battery, the signal processing unit processes the electrical output signal generated by the S-TENG. The microcontroller unit reads the processing result from the signal processing unit and uses its internal program to judge the gesture, then controls the unlocking effect display unit based on the gesture judgment result. Finally, the unlocking effect display unit demonstrates the corresponding effect. A correct unlocking gesture is one where the input gesture's excitation sequence and interval for the single-electrode triboelectric nanogenerator meet preset requirements. When a correct gesture is input, the unlocking function is achieved, and the correct unlocking gesture can be customized.

[0005] Specifically, the single-electrode triboelectric nanogenerator includes a freely movable dielectric / electret and an electrode layer for collecting gesture code signals. The dielectric / electret includes a human finger or a glove made of a highly electronegative material, such as polyimide (PI), polytetrafluoroethylene (PTFE), and polyethylene (PE). During non-contact gesture input, the dielectric / electret moves above the electrode layer; the smaller the vertical distance between them, the higher the output signal. The electrode layer for collecting gesture code signals consists of several commercially available copper electrodes, and the number and distribution of the electrodes can be flexibly adjusted according to specific application scenarios; for example, four electrodes are used (see attached). Figure 2 (abcd), commercial copper electrodes are distributed at the four corners of the rectangle; different gesture inputs include, but are not limited to, different TENG excitation sequences, attached Figure 2 This diagram illustrates the electrode layer distribution and two gesture-based password input methods.

[0006] Specifically, the signal processing unit is electrically connected to the single-electrode triboelectric nanogenerator and mainly includes a signal processing-wake-up circuit. This circuit includes a full-wave rectifier bridge electrically connected to the electrode layer of the single-electrode triboelectric nanogenerator, a capacitor (C) connected in parallel with the full-wave rectifier bridge, a resistor (R1) connected in parallel to the capacitor's output, a metal-oxide-semiconductor field-effect transistor (MOS transistor) with its gate connected to the positive terminal of the capacitor, a signal indicator light (LED) connected to the drain of the MOS transistor, and a protection resistor (R2) connected to the source of the MOS transistor. Both the protection resistor and the negative terminal of the signal processing-wake-up circuit are grounded, and a signal output is connected between the source of the MOS transistor and the protection resistor. A schematic diagram of the specific structure is attached. Figure 3 As shown.

[0007] Specifically, the microcontroller unit mainly includes a microcontroller (MCU), and the microcontroller has at least the same number of input ends as the number of electrode layers for collecting gesture password signals.

[0008] Specifically, the unlocking effect display unit is electrically connected to the microcontroller unit for demonstrating the corresponding unlocking effect. The unlocking effect display unit in the present invention can be a host computer demonstration interface, a switch, an LED, etc.

[0009] In this embodiment, 4 single-electrode triboelectric nanogenerators are used for non-contact gesture input; the host computer demonstration interface written based on LabVIEW is used as the unlocking effect display unit, and the excitation sequence (c-d-b-a) (attached Figure 2 -ii) is used as the correct gesture unlocking password to illustrate the function of the present invention.

[0010] A non-physical contact multi-dimensional information fusion intelligent gesture password lock of the present invention uses a dielectric / electret to provide an external non-contact gesture excitation, rectifies the pulsed electrostatic output generated by the single-electrode triboelectric nanogenerator and charges a capacitor, connects the positive electrode of the capacitor to the gate of the MOS transistor, and controls the on / off of the MOS transistor through the capacitor voltage. When the capacitor voltage is less than the threshold voltage of the MOS transistor, the source and drain of the MOS transistor are not conducting, and at this time, the source and the ground terminal are at the same potential and both are at zero potential; when the capacitor voltage is greater than the threshold voltage of the MOS transistor, the source and drain of the MOS transistor are conducting, and the source potential increases. The microcontroller reads the source potentials of 4 MOS transistors respectively and uses an internal program to send the corresponding output signals to the host computer. The host computer reads the signals sent by the microcontroller and records the first trigger moments of 4 channels through threshold comparison, denoted as T1-T4 respectively. When T1-T4 meet the set size requirements, that is, T3<T4<T2<T1, the host computer display interface displays "Password is correct, welcome", otherwise it displays "Password is incorrect, please re-enter". The specific algorithm flow chart is as attached Figure 4 shown.

[0011] Preferably, in order to achieve a more stable triggering effect, the electrostatic signal of the single-electrode triboelectric nanogenerator can be amplified through an operational amplifier circuit, and then the amplified voltage signal is used to control the on / off of the MOS transistor.

[0012] Preferably, in order to further improve the encryption security of the non-contact intelligent gesture password lock of the present invention, requirements for the trigger intervals of 4 channels can be added on the basis of meeting the correct unlocking gesture, and this is used as the correct password for the unlocking effect display unit. Taking the host computer display interface as an example of the unlocking effect display unit, the unlocking password after the security protection upgrade is "T3 < T4 < T2 < T1 and T2 - T4 > 500 ms". This method can significantly improve the security of the intelligent gesture password lock provided by the present invention; the trigger intervals between channels can be modified individually. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a logical relationship diagram between units of a non-physical contact multi-dimensional information fusion intelligent gesture password lock.

[0014] Figure 2 It is a schematic diagram of electrode layer distribution and two gesture password input diagrams.

[0015] Figure 3 It is a schematic diagram of the structural composition of a non-physical contact multi-dimensional information fusion intelligent gesture password lock.

[0016] Figure 4 It is a flowchart of the algorithm of a non-physical contact multi-dimensional information fusion intelligent gesture password lock.

[0017] 1 - Single-electrode triboelectric nanogenerator 2 - Signal processing unit 3 - Battery 4 - Microcontroller unit 5 - Unlocking effect display unit. SPECIFIC EMBODIMENTS

[0018] In order to facilitate the understanding of the technical solution of the present invention, the specific implementation method of the present invention will be introduced in detail below with reference to the accompanying drawings. Refer to the attached Figure 3 , a non-physical contact multi-dimensional information fusion intelligent gesture password lock provided by the present invention includes a single-electrode triboelectric nanogenerator (S-TENG) 1 composed of a dielectric / electret and an electrode layer, a signal processing unit 2 composed of a signal processing-wake-up circuit, a battery 3 for supplying power to the signal processing unit, a microcontroller unit 4 for identifying the state of the signal processing unit 3, and an unlocking effect display unit 5 for demonstrating the unlocking effect. In this embodiment, the unlocking effect unit 5 is a host computer demonstration interface written based on LabVIEW. When non-contact gesture input is performed (attached Figure 2) The S-TENG 1 inputs the collected electrostatic signals into the signal processing unit 2; under the power supply of the battery 3, the signal processing unit 2 processes the electrostatic signals input by the S-TENG 1 and uses them to control the on / off of the MOS transistors in the signal processing unit 2; the microcontroller unit 4 judges the on / off state of the MOS transistors by reading the source potential of the MOS transistors in the signal processing unit 2, and then outputs corresponding digital signals to the host computer according to the judged state results; the host computer processes the read digital signals in real time and records the first trigger moments of the four channels as T1 - T4 respectively; taking the excitation sequence (c - d - b - a) in Attachment Figure 2 -ii as an example of the preset correct gesture password: when the four channels connected to the four S-TENGs are all triggered, the host computer compares and judges the collected T1 - T4. If T3 < T4 < T2 < T1 is satisfied, the host computer interface displays "Password correct, welcome", otherwise the host computer interface displays "Password incorrect, please re-enter".

[0019] In summary, the non-physical-contact multi-dimensional information fusion intelligent gesture password lock provided by the present invention has the advantages of safety, high efficiency, flexible operation, etc. The gesture password that supports personalized modification has great convenience and intelligence, and has broad application prospects and value in the fields of smart home and intelligent security protection.

Claims

1. A non-physical contact, multi-dimensional information fusion smart gesture combination lock, characterized in that, The multi-dimensional information fusion smart gesture lock includes a single-electrode triboelectric nanogenerator (S-TENG), a signal processing unit, a battery, a microcontroller unit, and an unlocking effect display unit. The single-electrode triboelectric nanogenerator includes a freely movable dielectric / electret and an electrode layer that collects gesture password signals. The signal processing unit is electrically connected to the single-electrode triboelectric nanogenerator and mainly includes a signal processing-wake-up circuit; the battery powers the signal processing unit. The microcontroller unit mainly includes a microcontroller (MCU) used to identify the state of the signal processing unit and control the demonstration effect of the unlocking effect display unit. The input terminal of the microcontroller unit is electrically connected to the signal processing unit, and the output terminal is electrically connected to the unlocking effect display unit. Users input non-contact gestures using the dielectric / electret. Based on the principle of electrostatic induction, electrostatic signals can be collected on the electrode layer, i.e., the S-TENG generates an electrical output. Each S-TENG corresponds to one signal channel. Powered by the battery, the signal processing unit processes the electrical output signals generated by the S-TENG. The microcontroller unit reads the processing results from the signal processing unit and uses its internal program to judge the gesture. Then, it controls the unlocking effect display unit based on the gesture judgment result. Finally, the unlocking effect display unit demonstrates the corresponding effect. The correct unlocking gesture is one in which the excitation sequence and interval of the input gesture to the single-electrode triboelectric nanogenerator meet the preset requirements. When the correct gesture is input, the unlocking function can be realized. The correct unlocking gesture can be customized.

2. The non-physical contact multi-dimensional information fusion smart gesture combination lock as described in claim 1, characterized in that, The single-electrode triboelectric nanogenerator includes a freely movable dielectric / electret and an electrode layer for collecting gesture code signals. The dielectric / electret includes a human finger or a glove made of a highly electronegative material. When performing non-contact gesture input, the dielectric / electret moves above the electrode layer. The smaller the vertical distance between the two, the higher the output signal. The electrode layer for collecting gesture password signals consists of several commercial copper electrodes, and the number and position distribution of the electrode layer can be flexibly adjusted according to specific application scenarios.

3. The non-physical contact multi-dimensional information fusion smart gesture combination lock as described in claim 2, characterized in that, Materials with high electronegativity include polyimide (PI), polytetrafluoroethylene (PTFE), and polyethylene plastics.

4. The non-physical contact multi-dimensional information fusion smart gesture combination lock as described in claim 2, characterized in that, The electrode layer for collecting gesture password signals consists of four commercial copper electrodes abcd, which are distributed at the four corners of a rectangle.

5. The non-physical contact multi-dimensional information fusion smart gesture combination lock as described in claim 1, characterized in that, The signal processing-wake-up circuit includes a full-wave rectifier bridge electrically connected to the electrode layer of a single-electrode triboelectric nanogenerator, a capacitor (C) connected in parallel with the full-wave rectifier bridge, a resistor (R1) connected in parallel at the rear end of the capacitor, a metal-oxide-semiconductor field-effect transistor (MOS transistor) with its gate connected to the positive terminal of the capacitor, a signal indicator (LED) connected to the drain of the MOS transistor, and a protection resistor (R2) connected to the source of the MOS transistor. The protection resistor and the negative terminal of the signal processing-wake-up circuit are both grounded, and a signal output is connected between the source of the MOS transistor and the protection resistor.

6. The non-physical contact multi-dimensional information fusion smart gesture combination lock as described in claim 1, characterized in that, The microcontroller has input terminals that are at least as numerous as the number of electrode layers collecting gesture password signals.

7. The non-physical contact multi-dimensional information fusion smart gesture combination lock as described in claim 1, characterized in that, The unlocking effect display unit is a host computer demonstration interface, a switch, or an LED.

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