Random number generator based on friction nanometer generator

Abstract

The invention discloses a random number generator based on friction nano-generators, which comprises two friction nano-generators, a data acquisition module and a data processing module, and is characterized in that each friction nano-generator is used for generating a path of electric signal output comprising a random signal and a periodic signal; the periodic signal is generated through contact separation motion and external electromagnetic interference, the random signal is generated through heat fluctuation and charge attenuation in the contact separation motion process, and the data acquisition module is used for acquiring electric signals output by the two friction nanometer generators and outputting the electric signals to the data processing module. The data processing module is used for filtering the two paths of electric signals, filtering periodic signals generated by contact separation motion in the two paths of electric signals, subtracting the two paths of electric signals by using a difference algorithm, eliminating the periodic signals generated by electromagnetic interference in the two paths of electric signals, obtaining one path of random signals, and sending the random signals to the data processing module; converting the random signal into a random number and outputting the random number; the method has the advantages of low cost and high environmental adaptability.

Description

Technical Field

[0001] The invention relates to a random number generator, in particular to a random number generator based on a friction nanogenerator. Background Art

[0002] Random numbers are often used as keys in the field of information encryption because of their unpredictable nature. Random number generators are currently the most widely used devices for generating random numbers. Random number generators based on friction nanogenerators have been widely used in the field of information encryption because of their simplicity, effectiveness and practicality.

[0003] The existing random number generator based on triboelectric nanogenerator usually includes triboelectric nanogenerator, nonlinear device and operation module. The triboelectric nanogenerator has an inclined surface. When raindrops fall on the surface and slide along the surface, the electrodes of the triboelectric nanogenerator will sense the charge carried by the raindrops, thereby generating an electrical signal to output to the nonlinear device. Since the triboelectric nanogenerator uses the randomness of factors such as the charge, volume and speed of raindrops to generate electrical signals, and the triboelectric nanogenerator itself has a fixed structure and will also generate periodic signals, the electrical signals it generates include both random signals and periodic signals. The nonlinear device removes the periodic signal from the electrical signal output by the triboelectric nanogenerator and only outputs the random signal to the operation module, which converts the random signal into a hexadecimal random number for output.

[0004] However, in order to effectively convert the energy of raindrops into electrical signals, the existing random number generator based on triboelectric nanogenerator needs to use a chromium / gold double-layer film as an electrode, and its inclined surface needs to use a hydrophobic friction material, which makes the overall cost high. In addition, the random number generated by the existing random number generator based on triboelectric nanogenerator is only applicable to rainy environmental conditions, and the environmental adaptability is poor. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a random number generator based on a friction nanogenerator which has low cost and strong environmental adaptability.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a random number generator based on a friction nanogenerator, including two friction nanogenerators, a data acquisition module and a data processing module, each friction nanogenerator is used to generate an electrical signal output including a random signal and a periodic signal, the periodic signal is generated by contact separation movement and external electromagnetic interference, and the random signal is generated by heat fluctuation and charge decay during the contact separation movement. The data acquisition module is used to collect the electrical signals output by the two friction nanogenerators and output them to the data processing module, and the data processing module is used to first filter the two electrical signals output by the data acquisition module to filter out the periodic signal generated by the contact separation movement in the two electrical signals, and then use a differential algorithm to subtract the two electrical signals to eliminate the periodic signal generated by the electromagnetic interference in the two electrical signals to obtain a random signal, and then convert the random signal into a binary random number output.

[0007] Each of the friction nanogenerators comprises two copper electrodes, a paper layer and a PTFE film layer. The two copper electrodes, the paper layer and the PTFE film layer are all rectangular structures. The two copper electrodes are respectively called the first copper electrode and the second copper electrode. The length direction of the first copper electrode is taken as the front-to-back direction, the width direction is taken as the left-to-right direction, and the thickness direction is taken as the up-to-down direction. The length directions of the paper layer, the PTFE film layer and the second copper electrode are all along the front-to-back direction, the width directions are all along the left-to-right direction, and the thickness directions are all along the up-to-down direction. The first copper electrode, the paper layer, the PTFE film layer and the second copper electrode are distributed in order from top to bottom. The front ends of the first copper electrode, the paper layer, the PTFE film layer and the second copper electrode are located in the same plane. The first copper electrode, the paper layer, the PTFE film layer and the second copper electrode are The E film layer and the rear end of the second copper electrode are located in the same plane, the first copper electrode, the paper layer, the PTFE film layer and the left end of the second copper electrode are located in the same plane, the first copper electrode, the paper layer, the PTFE film layer and the right ends of the second copper electrode are located in the same plane, the upper surface of the paper layer is attached to the lower surface of the first copper electrode, and the two form a positive triboelectric unit, the lower surface of the PTFE film layer is attached to the upper surface of the second copper electrode, and the two form a negative triboelectric unit, the positive triboelectric unit can move in the up and down directions, contact or move away from the negative triboelectric unit, and realize contact and separation movement, and during the movement of the positive triboelectric unit in the up and down directions, an electrical signal output including a random signal and a periodic signal is generated between the first copper electrode and the second copper electrode.

[0008] The two friction nanogenerators are installed on two substrates, both of which are made of insulating materials. Both substrates are in the shape of a cuboid. The length directions of the two substrates are along the front-to-back direction, the width directions are along the left-to-right direction, and the thickness directions are along the up-down direction. The two substrates are respectively called the first substrate and the second substrate. The second substrate is located below the first substrate. The two friction nanogenerators are arranged between the first substrate and the second substrate at intervals on the left and right. The friction nanogenerator located on the left is called the first friction nanogenerator, and the friction nanogenerator located on the right is called the second friction nanogenerator. The front end face of the first substrate, the front end face of the second substrate, and the two copper electrodes, the paper layer, and the front end of the PTFE film layer of the two friction nanogenerators are all located in the same plane. The rear end face of the first substrate, the rear end face of the second substrate, and the two The rear ends of the two copper electrodes, paper layer and PTFE film layer of a friction nanogenerator are all located in the same plane, the left end surface of the first substrate, the left end surface of the second substrate and the left ends of the two copper electrodes, paper layer and PTFE film layer of the first friction nanogenerator are all located in the same plane, the right end surface of the first substrate, the right end surface of the second substrate and the right ends of the two copper electrodes, paper layer and PTFE film layer of the second friction nanogenerator are all located in the same plane, the upper surfaces of the first copper electrodes of the two friction nanogenerators are both attached and fixed on the lower surface of the first substrate, and the lower surfaces of the second copper electrodes of the two friction nanogenerators are both attached and fixed on the upper surface of the second substrate. By driving the first substrate to move in the up and down directions, the positive triboelectric units of the two friction nanogenerators can be driven to move in the up and down directions at the same time.

[0009] The length of the two substrates is 10 cm, the width is 8.5 cm, and the thickness is 3 mm. The length of the two copper electrodes, the paper layer and the PTFE film layer of the two friction nanogenerators are 10 cm, and the width is 4 cm. The thickness of the two copper electrodes of the two friction nanogenerators is 60 nm, the thickness of the paper layer of the two friction nanogenerators is 100 nm, and the thickness of the PTFE film layer of the two friction nanogenerators is 80 nm.

[0010] The materials of both substrates are acrylic.

[0011] Compared with the prior art, the present invention has the advantages that two friction nanogenerators, a data acquisition module and a data processing module constitute a random number generator based on the friction nanogenerator, each friction nanogenerator is used to generate an electrical signal output including a random signal and a periodic signal, the periodic signal is generated by contact separation movement and external electromagnetic interference, and the random signal is generated by heat fluctuation and charge decay during the contact separation movement. The data acquisition module is used to collect the electrical signals output by the two friction nanogenerators and output them to the data processing module, and the data processing module is used to first filter the two electrical signals output by the data acquisition module to filter out the periodic signal generated by the contact separation movement in the two electrical signals, and then use a differential algorithm to subtract the two electrical signals to eliminate the periodic signal generated by the electromagnetic interference in the two electrical signals to obtain a random signal, and then convert the random signal into a binary random number output. The present invention generates random numbers based on the heat fluctuation and charge decay during the contact separation movement inside the friction nanogenerator, without the need for high-performance electrodes and friction materials. At the same time, the contact separation movement can be realized in almost all environments. Therefore, the present invention has low cost and strong environmental adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a structural block diagram of a random number generator based on a friction nanogenerator of the present invention;

[0013] Figure 2 It is a schematic diagram of the structure of two friction nanogenerators of the random number generator based on the friction nanogenerator of the present invention;

[0014] Figure 3 A waveform diagram of an electrical signal generated when two friction nanogenerators of a random number generator based on a friction nanogenerator of the present invention perform contact and separation motion;

[0015] Figure 4 A waveform diagram of a random signal obtained by a data processing module of a random number generator based on a triboelectric nanogenerator of the present invention;

[0016] Figure 5 A power spectrum density diagram of a random signal obtained by a data processing module of a random number generator based on a triboelectric nanogenerator of the present invention;

[0017] Figure 6 A probability density function diagram of a random signal obtained by a data processing module of a random number generator based on a triboelectric nanogenerator of the present invention;

[0018] Figure 7 A random number binary image of a binary random number obtained by a data processing module of a random number generator based on a triboelectric nanogenerator of the present invention;

[0019] Figure 8 This is an autocorrelation coefficient diagram of binary random numbers obtained by the data processing module of the random number generator based on the friction nanogenerator of the present invention. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings.

[0021] Embodiment 1: Figure 1 As shown, a random number generator based on a friction nanogenerator includes two friction nanogenerators, a data acquisition module and a data processing module, each friction nanogenerator is used to generate an electrical signal output including a random signal and a periodic signal, the periodic signal is generated by contact separation movement and external electromagnetic interference, and the random signal is generated by heat fluctuation and charge decay during the contact separation movement. The data acquisition module is used to collect the electrical signals output by the two friction nanogenerators and output them to the data processing module, and the data processing module is used to first filter the two electrical signals output by the data acquisition module to filter out the periodic signal generated by the contact separation movement in the two electrical signals, and then use a differential algorithm to subtract the two electrical signals to eliminate the periodic signal generated by the electromagnetic interference in the two electrical signals to obtain a random signal, and then convert the random signal into a binary random number output.

[0022] In this embodiment, the electrical signals generated by the heat fluctuations during the contact and separation process of the two friction nanogenerators and the electrical signals generated by the surface charge decay are both random signals, while the electrical signals generated by the contact and separation movement of the two friction nanogenerators and the electrical signals generated by external electromagnetic interference are both periodic signals. When the electrical signals generated by the two friction nanogenerators are collected by the data acquisition module, random signals and periodic signals will be collected at the same time. Since the periodic signals are distributed in the low frequency band and have similar waveforms, the data processing module can eliminate most of the periodic signals (periodic signals generated by the contact and separation movement) by using high-pass filtering, and then use a differential algorithm to eliminate the electrical signals generated by external electromagnetic interference and retain most of the random signals, thereby improving the quality of random numbers.

[0023] The random number generator based on the friction nanogenerator of this embodiment generates random numbers based on the heat fluctuation and charge decay during the contact-separation movement inside the friction nanogenerator, without the need for high-performance electrodes and friction materials. At the same time, the contact-separation movement can be realized in almost all environments, and has strong environmental adaptability.

[0024] Embodiment 2: This embodiment is basically the same as Embodiment 1, except that: in this embodiment, Figure 2As shown, each friction nanogenerator includes two copper electrodes, a paper layer 1 and a PTFE film layer 2. The two copper electrodes, the paper layer 1 and the PTFE film layer 2 are all rectangular structures. The two copper electrodes are respectively called the first copper electrode 3 and the second copper electrode 4. The length direction of the first copper electrode 3 is taken as the front-to-back direction, the width direction is taken as the left-to-right direction, and the thickness direction is taken as the up-to-down direction. The length directions of the paper layer 1, the PTFE film layer 2 and the second copper electrode 4 are all along the front-to-back direction, the width directions are all along the left-to-right direction, and the thickness directions are all along the up-to-down direction. The first copper electrode 3, the paper layer 1, the PTFE film layer 2 and the second copper electrode 4 are distributed in order from top to bottom. The front ends of the first copper electrode 3, the paper layer 1, the PTFE film layer 2 and the second copper electrode 4 are located in the same plane. , the rear ends of the PTFE film layer 2 and the second copper electrode 4 are located in the same plane, the left ends of the first copper electrode 3, the paper layer 1, the PTFE film layer 2 and the second copper electrode 4 are located in the same plane, the right ends of the first copper electrode 3, the paper layer 1, the PTFE film layer 2 and the second copper electrode 4 are located in the same plane, the upper surface of the paper layer 1 is attached to the lower surface of the first copper electrode 3, and the two form a positive triboelectric unit, the lower surface of the PTFE film layer 2 is attached to the upper surface of the second copper electrode 4, and the two form a negative triboelectric unit, the positive triboelectric unit can move in the up and down directions, contact or move away from the negative triboelectric unit, and realize contact and separation movement. During the movement of the positive triboelectric unit in the up and down directions, an electrical signal output including a random signal and a periodic signal is generated between the first copper electrode 3 and the second copper electrode 4.

[0025] In this embodiment, two friction nanogenerators are installed on two substrates, both of which are made of insulating material. Both substrates are in the shape of a cuboid. The length directions of the two substrates are along the front-to-back direction, the width directions are along the left-to-right direction, and the thickness directions are along the up-down direction. The two substrates are respectively called the first substrate 5 and the second substrate 6. The second substrate 6 is located below the first substrate 5. The two friction nanogenerators are arranged between the first substrate 5 and the second substrate 6 at intervals on the left and right. The friction nanogenerator located on the left is called the first friction nanogenerator 7, and the friction nanogenerator located on the right is called the second friction nanogenerator 8. The front end surface of the first substrate 5, the front end surface of the second substrate 6, and the two copper electrodes of the two friction nanogenerators, the paper layer 1 and the front end of the PTFE film layer 2 are all located in the same plane. The rear end surface of the first substrate 5 and the rear end surface of the second substrate 6 The two copper electrodes of the two friction nanogenerators, the rear ends of the paper layer 1 and the PTFE film layer 2 are all located in the same plane, the left end surface of the first substrate 5, the left end surface of the second substrate 6, the two copper electrodes of the first friction nanogenerator 7, the paper layer 1 and the left end of the PTFE film layer 2 are all located in the same plane, the right end surface of the first substrate 5, the right end surface of the second substrate 6, and the two copper electrodes of the second friction nanogenerator 8, the paper layer 1 and the right end of the PTFE film layer 2 are all located in the same plane, the upper surfaces of the first copper electrodes 3 of the two friction nanogenerators are attached and fixed on the lower surface of the first substrate 5, and the lower surfaces of the second copper electrodes 4 of the two friction nanogenerators are attached and fixed on the upper surface of the second substrate 6. By driving the first substrate 5 to move in the up and down directions, the positive triboelectric units of the two friction nanogenerators can be driven to move in the up and down directions at the same time.

[0026] In this embodiment, when the positive triboelectric units and the negative triboelectric units of the two friction nanogenerators are in contact with each other, the two friction nanogenerators are in an initial state, the negative triboelectric units of the two friction nanogenerators and the second substrate 6 carrying the negative triboelectric units of the two friction nanogenerators are both stationary during the contact and separation movement, and the first substrate 5 carrying the positive triboelectric units of the two friction nanogenerators is fixed on an external excitation source (the external excitation source can be various mature technologies in the current industry for linear motion in the up and down directions). In this embodiment, a linear motor is used as an external excitation source, wherein the motion amplitude of the external excitation source is within 2 cm and the motion frequency is greater than 0.1 Hz. During the operation of the external excitation source, the external excitation source drives the positive triboelectric units of the two triboelectric nanogenerators and the first substrate 5 to move together, and the paper layer 1 (i.e., friction material) of the positive triboelectric units of the two triboelectric nanogenerators and the PTFE film layer 2 (i.e., friction material) of the negative triboelectric units contact and separate from each other. During the contact process, according to the contact electrification principle, all friction materials will carry static charges due to contact. At this time, the PTFE film layer 2 of the two triboelectric nanogenerators is negatively charged, and the paper layer 1 of the two triboelectric nanogenerators is positively charged. According to the principle of electrostatic induction, during the contact and separation movement, the static charges on the PTFE film layer 2 and the paper layer 1 of the two triboelectric nanogenerators will induce charges of opposite polarity on the copper electrodes in contact with them. The charges induced in the copper electrodes of the positive triboelectric unit of each triboelectric nanogenerator and its negative triboelectric unit are opposite in polarity. By connecting a wire 9 to each copper electrode to form a loop, the induced charges will flow, and then generate an electrical signal output. The data acquisition module is connected to the two copper electrodes of the two friction nanogenerators through the wire 9. The electrical signals generated by the two friction nanogenerators are introduced into the data acquisition module (various data acquisition cards and microprocessors can be used) through the wire 9 at the copper electrodes of the two friction nanogenerators. The data acquisition module collects the two electrical signals. In this embodiment, the data acquisition module is an oscilloscope.

[0027] The electrical signals generated by each friction nanogenerator include electrical signals generated by contact separation motion, electrical signals generated by external heat fluctuation, electrical signals generated by charge decay, and electrical signals generated by external electromagnetic interference coupled to the two copper electrodes of each friction nanogenerator. Among them, the electrical signals generated by heat fluctuation and the electrical signals generated by charge decay present random characteristics, and the electrical signals generated by contact separation motion and the electrical signals generated by external electromagnetic interference coupled to the two copper electrodes of each friction nanogenerator both present periodic characteristics. Because the two friction nanogenerators are driven by the same external excitation source, the electrical signal outputs of the two friction nanogenerators are very similar. When analyzing the characteristics of the output electrical signals of the two friction nanogenerators, in order to make the description more concise, only the electrical signal output by the first friction nanogenerator 7 is analyzed, and the analysis results are also completely applicable to the electrical signal output by the second friction nanogenerator 8. The analysis is as follows: In the electrical signal output by the first friction nanogenerator 7, the frequency of the electrical signal generated by the contact separation motion is the same as the frequency of the contact separation motion itself, so the electrical signal generated by the contact separation motion of the first friction nanogenerator 7 is mainly concentrated in the low frequency band. In the first friction nanogenerator 7, the electrical signals generated by external heat fluctuations and the electrical signals generated by charge decay are evenly distributed in various frequency bands. According to the above analysis of the electrical signals of the first friction nanogenerator 7, it can be concluded that the low-frequency periodic signal generated by the contact and separation movement of the first friction nanogenerator 7 can be filtered out by the high-pass filtering method of the data processing module, because the electrical signals generated by the external heat fluctuations and the electrical signals generated by the charge decay are distributed in various frequency bands, and most of the random electrical signals can be retained after high-pass filtering. However, the electrical signals generated by the external electromagnetic interference coupled to the two copper electrodes of each friction nanogenerator are also mainly concentrated in the high-frequency band, and the high-pass filtering method cannot effectively filter out the periodic signals. Because the two friction nanogenerators are close to each other, the electrical signals generated by the external electromagnetic interference coupled to the two copper electrodes of each friction nanogenerator are highly similar. The electrical signals on the two friction nanogenerators are subtracted by the differential operation of the data processing module, which not only eliminates the periodic signals generated by the electromagnetic interference, but also does not affect the random signals. Then the data processing module converts the positive amplitude in the random signal into a binary number 1 and the negative amplitude into a binary number 0, thus obtaining the required binary random number.

[0028] Embodiment 3: This embodiment is basically the same as Embodiment 2, except that: in this embodiment, Figure 2As shown, the length of the two substrates is 10 cm, the width is 8.5 cm, and the thickness is 3 mm. The length of the two copper electrodes, the paper layer 1 and the PTFE film layer 2 of the two friction nanogenerators is 10 cm, the width is 4 cm, the thickness of the two copper electrodes of the two friction nanogenerators is 60 nm, the thickness of the paper layer 1 of the two friction nanogenerators is 100 nm, and the thickness of the PTFE film layer 2 of the two friction nanogenerators is 80 nm.

[0029] Embodiment 4: This embodiment is basically the same as Embodiment 2, except that: in this embodiment, Figure 2 As shown, the materials of the two substrates are both acrylic.

[0030] In order to verify the performance of the random number generator based on the friction nanogenerator of the present invention, the random number generator based on the friction nanogenerator of the present invention is simulated. The waveform of the electrical signal generated when the two friction nanogenerators of the random number generator based on the friction nanogenerator of the present invention perform contact and separation motion is shown in FIG. Figure 3 As shown; the waveform diagram of the random signal obtained by the data processing module of the random number generator based on the friction nanogenerator of the present invention is as follows Figure 4 shown. Figure 3 In the figure, the dark waveform represents the electrical signal generated by the first friction nanogenerator, and the light waveform represents the electrical signal generated by the second friction nanogenerator. The frequencies of the two electrical signal waveforms are consistent, about 1 Hz, and the amplitude and phase differences are large. From the analysis chart, it can be seen that the electrical signal generated by the contact and separation movement of the two friction nanogenerators has periodic characteristics, and the random characteristics are not obvious. Figure 4 is Figure 3 Based on the electrical signal waveform shown in FIG. 1 , a random electrical signal waveform is obtained after high-pass filtering and differential operation by the data processing module. Figure 4 It can be seen that the positive and negative voltage amplitudes of the two friction nanogenerators are both around 0.1V, and the amplitude relationship between the dark and light waveforms changes randomly. Through differential operation, the voltage amplitude of the first friction nanogenerator is subtracted from the voltage amplitude of the second friction nanogenerator, and the positive and negative values ​​of the difference are random. The corresponding positive amplitude is converted into a binary number 1, and the corresponding negative amplitude is converted into a binary number 0, so that a binary random number can be generated.

[0031] The power spectrum density is the distribution of signal power in the frequency domain, which can be used to distinguish periodic signals from non-periodic signals, random signals from non-random signals. The power spectrum density diagram of the random signal obtained by the data processing module of the random number generator based on the friction nanogenerator of the present invention is shown in FIG. Figure 5 shown by Figure 5It can be seen that the power at all frequencies is almost a constant, which is very consistent with the ideal white noise. At the same time, the graph itself is very continuous and there is no obvious discrete distribution, which shows that the data has ideal random characteristics.

[0032] The probability density function diagram of the random signal obtained by the data processing module of the random number generator based on the friction nanogenerator of the present invention is as follows: Figure 6 As shown; the random signal obtained by the data processing module is statistically analyzed according to the amplitude size to obtain Figure 6 The bar graph shown, Figure 6 In the figure, the black curve is the normal distribution fitting curve of the histogram. Figure 6 It can be seen that the probability of occurrence of positive and negative voltage amplitudes is approximately equal, which is manifested as the histogram is symmetrical about the 0 amplitude and is in an inverted bell shape that conforms to the normal distribution characteristics. This distribution characteristic ensures the uniformity of the 0 / 1 distribution and the consistency of the occurrence probability when converting the amplitude to binary. The above consistency and uniformity are the guarantee of randomness.

[0033] The random number binary value diagram of the binary random number obtained by the data processing module of the random number generator based on the friction nanogenerator of the present invention is as follows: Figure 7 As shown; Figure 7 The binary random number output by the data processing module corresponds to a 1000×1000 binary image. In this image, the black block represents the binary number 0 and the white block represents the binary number 1. Figure 7 It can be seen that there is no regular graphic distribution, and the black and white blocks are arranged with completely random characteristics, which proves that the generated binary random numbers are completely random.

[0034] pass Figure 7 It can be seen that the generated random numbers show good randomness overall, but further verification of their internal correlation is needed. According to the calculation formula of the autocorrelation coefficient, it can be calculated that Figure 7 The above binary random numbers and their autocorrelation coefficients under a specific delay are shown, and 166666 binary random numbers are taken to calculate the autocorrelation coefficients, and the following is obtained: Figure 8 The autocorrelation coefficient graph shown in . Figure 8 It can be seen that the correlation within random numbers is almost negligible because the autocorrelation coefficient is generally less than 0.01.

[0035] In summary, the random number generator based on the friction nanogenerator of the present invention has low cost and strong environmental adaptability, and can generate random numbers with strong randomness.

Claims

1. A random number generator based on a friction nanogenerator, characterized in that The invention comprises two friction nanogenerators, a data acquisition module and a data processing module, each friction nanogenerator is used to generate an electrical signal output including a random signal and a periodic signal, the periodic signal is generated by contact separation movement and external electromagnetic interference, the random signal is generated by heat fluctuation and charge decay during the contact separation movement, the data acquisition module is used to collect the electrical signals output by the two friction nanogenerators and output them to the data processing module, the data processing module is used to first filter the two electrical signals output by the data acquisition module, filter out the periodic signal generated by the contact separation movement in the two electrical signals, then use a differential algorithm to subtract the two electrical signals, eliminate the periodic signal generated by the electromagnetic interference in the two electrical signals, obtain a random signal, and then convert the random signal into a binary random number output.

2. The random number generator based on the friction nanogenerator according to claim 1 is characterized in that Each of the friction nanogenerators comprises two copper electrodes, a paper layer and a PTFE film layer. The two copper electrodes, the paper layer and the PTFE film layer are all rectangular structures. The two copper electrodes are respectively called the first copper electrode and the second copper electrode. The length direction of the first copper electrode is taken as the front-to-back direction, the width direction is taken as the left-to-right direction, and the thickness direction is taken as the up-to-down direction. The length directions of the paper layer, the PTFE film layer and the second copper electrode are all along the front-to-back direction, the width directions are all along the left-to-right direction, and the thickness directions are all along the up-to-down direction. The first copper electrode, the paper layer, the PTFE film layer and the second copper electrode are distributed in order from top to bottom. The front ends of the first copper electrode, the paper layer, the PTFE film layer and the second copper electrode are located in the same plane. The first copper electrode, the paper layer, the PTFE film layer and the second copper electrode are The E film layer and the rear end of the second copper electrode are located in the same plane, the first copper electrode, the paper layer, the PTFE film layer and the left end of the second copper electrode are located in the same plane, the first copper electrode, the paper layer, the PTFE film layer and the right ends of the second copper electrode are located in the same plane, the upper surface of the paper layer is attached to the lower surface of the first copper electrode, and the two form a positive triboelectric unit, the lower surface of the PTFE film layer is attached to the upper surface of the second copper electrode, and the two form a negative triboelectric unit, the positive triboelectric unit can move in the up and down directions, contact or move away from the negative triboelectric unit, and realize contact and separation movement, and during the movement of the positive triboelectric unit in the up and down directions, an electrical signal output including a random signal and a periodic signal is generated between the first copper electrode and the second copper electrode.

3. The random number generator based on the friction nanogenerator according to claim 2 is characterized in that The two friction nanogenerators are installed on two substrates, both of which are made of insulating materials. Both substrates are in the shape of a cuboid. The length directions of the two substrates are along the front-to-back direction, the width directions are along the left-to-right direction, and the thickness directions are along the up-down direction. The two substrates are respectively called the first substrate and the second substrate. The second substrate is located below the first substrate. The two friction nanogenerators are arranged between the first substrate and the second substrate at intervals on the left and right. The friction nanogenerator located on the left is called the first friction nanogenerator, and the friction nanogenerator located on the right is called the second friction nanogenerator. The front end face of the first substrate, the front end face of the second substrate, and the two copper electrodes, the paper layer, and the front end of the PTFE film layer of the two friction nanogenerators are all located in the same plane. The rear end face of the first substrate, the rear end face of the second substrate, and the two The rear ends of the two copper electrodes, paper layer and PTFE film layer of a friction nanogenerator are all located in the same plane, the left end surface of the first substrate, the left end surface of the second substrate and the left ends of the two copper electrodes, paper layer and PTFE film layer of the first friction nanogenerator are all located in the same plane, the right end surface of the first substrate, the right end surface of the second substrate and the right ends of the two copper electrodes, paper layer and PTFE film layer of the second friction nanogenerator are all located in the same plane, the upper surfaces of the first copper electrodes of the two friction nanogenerators are both attached and fixed on the lower surface of the first substrate, and the lower surfaces of the second copper electrodes of the two friction nanogenerators are both attached and fixed on the upper surface of the second substrate. By driving the first substrate to move in the up and down directions, the positive triboelectric units of the two friction nanogenerators can be driven to move in the up and down directions at the same time.

4. The random number generator based on the friction nanogenerator according to claim 3 is characterized in that The length of the two substrates is 10 cm, the width is 8.5 cm, and the thickness is 3 mm. The length of the two copper electrodes, the paper layer and the PTFE film layer of the two friction nanogenerators are 10 cm, and the width is 4 cm. The thickness of the two copper electrodes of the two friction nanogenerators is 60 nm, the thickness of the paper layer of the two friction nanogenerators is 100 nm, and the thickness of the PTFE film layer of the two friction nanogenerators is 80 nm.

5. The random number generator based on the friction nanogenerator according to claim 3 is characterized in that The materials of both substrates are acrylic.

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