TWM631037U - Intelligent conference anti-skimming interference device - Google Patents

Abstract

This creation provides an intelligent conference anti-skimming interference device, which includes: a carrier; at least one ultrasonic emitting device, which is arranged on the carrier, and the ultrasonic emitting device is used for a sound source and a sound receiving source. The output frequency is between 24kHz and 26kHz of ultrasonic interference signal. In this way, through the output of ultrasonic interference signal in a specific frequency band, the ultrasonic interference signal can be superimposed on the signal recorded by the radio source, including the sound of the sound source and the environment. In addition, through the carrier configuration of the upper positioning surface, the middle positioning surface and the lower positioning surface with different inclination angles, the ultrasonic transmitting device can be arranged in an array, and When the carrier is rotated through the driving device, the ultrasonic interference signal can cover all angles or ranges between the sound source and the sound source, so that the sound source can be interfered with, so as to effectively prevent the side recording function or monitor through the network.

Description

Intelligent conference anti-skimming interference device

This creation provides a method and device for preventing skimming interference in an intelligent conference, especially an audio source that can be picked up to interfere, so that the audio content of the skimming cannot be recognized during playback, so as to achieve the effect of preventing skimming or pass the network monitor.

Press, with the rapid development of science and technology, many industries often face the situation that some companies obtain information through improper means, resulting in loss of their own interests, such as: intercepting data packets through network equipment to obtain user information or passwords, so, communication base stations, etc. Communication leakage prevention measures for basic equipment have recently received more and more attention from various countries, and they are regarded as national security levels. Therefore, mutual trust countries promote reliable communication partner alliances; with the popularization of Internet access or communication using mobile devices, daily In life, voice monitoring can be described as one of the most frequently violated privacy.

Noise-free and privacy are the issues that users are concerned about during the meeting. In addition to obtaining quiet conditions and information security in a confined space environment, advanced signal processing technology is still needed to block the background sound during the meeting, so as to facilitate the meeting. Good voice communication can be achieved on-site or at the far end of the Internet, ensuring quality conference discussions; however, another issue of concern is how to prevent third parties from recording or monitoring the content of voice discussions or conversations over the Internet; in addition to professional In addition to miniature recording devices, recording software can now be installed on any smartphone, and the recording action can be done at your fingertips. Even if the meeting participants did not actively record during the meeting, hackers may still intend to hack the meeting participants' devices and conduct eavesdropping.

The voice jamming devices currently on the market are wearable devices for preventing recording. Among them, the jammer is arranged in a plane line, and the signal is transmitted in two fixed directions: forward and backward. Users can follow the two directions of signal transmission of the device, and they can also install additional ultrasonic transducers to expand to multiple directions to achieve interference. For other devices, it is a device worn on the wrist during a close conversation between people, so that the device can move slightly in space to achieve the sound shielding effect required by the user; however, the aforementioned The equipment still has a blind spot for sound shielding, and cannot effectively interfere with the sound in all directions, so there is still the concern that it is easy to be scribbled.

In view of this, the creators have specially researched and improved the anti-skimming equipment, hoping to improve the above problems with a better creation, and after long-term research and development and continuous testing, this creation came out.

The purpose of this creation is to solve the aforementioned problems. In order to achieve the above purpose, our creators provide an intelligent conference anti-skimming interference device, which includes: a carrier; and at least one ultrasonic emitting device, which is arranged in the the carrier, and the ultrasonic transmitting device is used for outputting an ultrasonic interference signal with a frequency in the vicinity of the highest peak frequency (25kHz) between a sound source and a sound receiving source, and covers the receiving audio frequency band of the sound receiving source, and The radio frequency range is between low frequency and 3kHz.

According to the above-mentioned intelligent conference anti-skimming interference device, the frequency of the ultrasonic interference signal is between 24kHz and 26kHz.

According to the above-mentioned intelligent conference anti-skimming interference device, the ultrasonic interference signal is additive white Gaussian noise.

According to the above-mentioned intelligent conference anti-skimming interference device, wherein the carrier is further formed with an upper positioning surface, a middle positioning surface and a lower positioning surface from the top end to the bottom end, and the positioning surfaces have different inclination angles. , and the positioning surfaces are respectively provided with at least one of the ultrasonic emitting devices.

According to the above-mentioned intelligent conference anti-skimming interference device, wherein the upper positioning surface forms an angle of 35 degrees with a direction of gravity, the middle positioning surface forms an angle of 17.5 degrees with the direction of gravity, and The lower positioning surface is slightly parallel to the direction of gravity.

According to the above-mentioned intelligent conference anti-skimming interference device, the carrier is further provided with a plurality of bearing surfaces, and the bearing surfaces are respectively provided with the upper positioning surface, the middle positioning surface and the lower positioning surface, and the bearing surfaces are respectively provided with the upper positioning surface, the middle positioning surface and the lower positioning surface. tied laterally around those forming the carrier.

According to the above-mentioned intelligent conference anti-skimming interference device, it further includes a driving device, which is correspondingly connected to and rotationally drives the carrier.

According to the above-mentioned intelligent conference anti-skimming interference device, it further comprises a processing unit coupled to a signal generating module, the signal generating module is connected with at least one amplifying circuit module, and the ultrasonic transmitting device is a Correspondingly connected to at least one of the amplifying circuit modules.

According to the above-mentioned intelligent conference anti-skimming interference device, it further includes a driving device, which is coupled to the processing unit, and the driving device is correspondingly connected to and rotationally drives the carrier.

From the above description and settings, it is obvious that this creation mainly has the following advantages and effects, which are described in detail as follows:

1. This creation outputs the ultrasonic interference signal with an output frequency between 20kHz and 30kHz (preferably 24kHz to 26kHz), so that the ultrasonic interference signal can be superimposed on the signal recorded by the radio source, including the sound and environment of the sound source. In addition, through the carrier configuration of the upper positioning surface, the middle positioning surface and the lower positioning surface with different inclination angles, the ultrasonic transmitting device can be arranged in an array, and When the carrier is rotated through the driving device, the ultrasonic interference signal can cover all angles or ranges between the sound source and the sound source, so that there is a small blind angle for shielding, so that the sound source can be interfered with, so as to ensure the dialogue content of the use situation. It can obtain protection, and then effectively achieve the function of preventing skimming and network monitoring.

This creation is an intelligent conference anti-skimming interference device, and its implementation means, features and effects are described in detail below with several preferred feasible embodiments and diagrams, so as to provide the audience with an in-depth understanding and approval of this creation. .

First of all, please refer to Figure 1 to Figure 3, this creation is an intelligent conference anti-skimming interference device, which includes:

a carrier 1; and

At least one ultrasonic emitting device 2 is disposed on the carrier 1, and the ultrasonic emitting device 2 is used to output an ultrasonic interference signal with a frequency between 20 kHz and 30 kHz between a sound source and a sound receiver. Covers the radio frequency range of the radio source, and the radio frequency range is between low frequency (about 20Hz) to 3kHz.

In one embodiment, the ultrasonic transmitter 2 is an ultrasonic transmitter with a frequency band of 25 kHz from JINCI Technology, which is smaller in size and can withstand higher voltage peaks than general speakers, that is, it can achieve small size and The effect of strong interference effect; with the configuration of its microcontroller, it can also have a high resolution (frequency resolution) of 0.1mHz at a frequency of 25kHz. In this embodiment, a normal (Gaussian) distribution is used. The random number generating function is used to provide a value in the range of 25±1kHz, and the random value continues to output the frequency in the loop, and then the ultrasonic transmitting device 2 outputs the corresponding ultrasonic interference signal through the amplifier.

Among them, the hearing frequency of the human ear falls between 20Hz~20kHz. In order to avoid interfering with the microphone and affecting the dialogue between people, the frequency of the ultrasonic interference signal used in this creation is higher than 20kHz, which may Interfering with the sound of the radio source, and its frequency cannot be heard by the human ear, and the radio source is usually a microphone, and the interference principle of this creation is mainly through the nonlinear diaphragm and power amplifier inside the microphone, in which the signal passes through the power The amplifier is linear in the audible frequency range, but non-linear in the inaudible range, resulting in noise at different frequencies. Therefore, the output of this creation through the ultrasonic interference signal can indeed be used for the microphone. interference.

As mentioned above, when the microphone receives ultrasonic waves, it will generate noise in the normal frequency band due to nonlinear amplification. Therefore, in an experimental example, the present invention is to start the ultrasonic transmitting device 2 at the same time, and use the microphone to record with a distance of 0.5 The distance in meters is measured. When the ultrasonic interference signal is at a frequency of 25kHz, the noise frequency received by the microphone is more concentrated at the frequency of 3kHz, which is relatively single and fixed and covers a small frequency band. If the ultrasonic interference signal is evenly distributed and output at 20kHz~ When the frequency is 30kHz, the noise frequency received by the microphone is relatively scattered in each frequency, covering a wide range, but the sound amplitude is significantly reduced. The main reason is the characteristics of the ultrasonic transmitter 2. The ultrasonic transmitter used in this creation For device 2, the sound pressure level is the highest in the frequency band of 25±1 kHz, and the sound pressure level is obviously attenuated at frequencies larger or smaller than this frequency band.

In order to understand the difference between the receiving frequency bands, the actual received frequency distribution data in the three frequency ranges were measured. As shown in Figure 4, when the ultrasonic interference signal is 25kHz frequency, the amplitude change is the largest, but it is less concentrated; When the ultrasonic interference signal is 24kHz~26kHz frequency, the sound pressure attenuation is much lower than the frequency of 20kHz~30kHz, and the noise frequency distribution received by the microphone mainly falls within 1kHz; the audio frequency distribution of adult males in language communication is 85%. ~155Hz, adult female is 165~255Hz, therefore, the ultrasonic interference signal of 24kHz~26kHz is quite suitable for the effect of interfering with the radio source to receive people's conversation; and the additive Gaussian white noise is used to distribute the frequency evenly between 24kHz~26kHz Among them, the energy distribution of the ultrasonic interference signal received by the microphone can be made more uniform, so that the interference effect can be more prominent.

As far as the hardware configuration of the present invention is concerned, in an embodiment, the carrier 1 further forms an upper positioning surface 11, a middle positioning surface 12 and a lower positioning surface 13 from the top end to the bottom end, as shown in FIG. 2 and FIG. 2 . As shown in Figure 3, the positioning surfaces 11, 12, 13 have different inclination angles, and the positioning surfaces 11, 12, 13 are respectively provided with at least one ultrasonic emitting device 2, so as to make the ultrasonic wave The launching device 2 can be arranged on the carrier 1 in an array, so that multi-directional and omnidirectional interference can be performed. The angle θ2 between the surface 12 and the gravitational direction g is slightly 17.5 degrees, and the lower positioning surface 13 is slightly parallel to the gravitational direction g, so that this creation can be arranged on a desktop, and considering the common conference table When the short side is at least 80 cm, the angle of the upper positioning surface 11 can be used to cover the position where the skimmer may be hidden in the entire human body. The middle value of the angle of the lower positioning surface 13 can evenly distribute the position and angle of the ultrasonic emitting device 2 on the surface of the carrier 1; and the lower positioning surface 13 is emitted in a direction parallel to the desktop; and the carrier 1 is further provided with a plurality of bearing The upper positioning surface 11 , the middle positioning surface 12 and the lower positioning surface 13 are respectively provided on the bearing surface 14 , and the bearing surface 14 is laterally surrounded to form the carrier 1 . As shown in this embodiment, according to the configuration with a hexagonal cross section, the carrier 1 can be configured with eighteen groups of ultrasonic transmitting devices 2 in a circular array, so as to achieve the effect of all-round interference on the desktop; The creation uses Matlab software to simulate the coverage area to obtain a better spatial configuration of the ultrasonic transmitting device 2, so as to have better intensity and spatial distribution under the array configuration of the creation; in other embodiments, it can also be transmitted through the carrier 1. A driving device 3 is arranged, and the driving device 3 is connected to drive the carrier 1 to rotate, so as to ensure that the ultrasonic interference signal can reliably cover and interfere with the sound source.

In addition, as for the system architecture of the present invention, as shown in FIG. 1, a processing unit 4 is configured, which is coupled with a signal generating module 41, and the signal generating module 41 is connected with at least one amplifying circuit module. group 42, and the ultrasonic transmitting device 2 is correspondingly connected to at least one of the amplifying circuit modules 42. In a specific embodiment, the processing unit 4 uses an Atmega328p microcontroller of the Arduino series, and the power supply part, It can be connected to a switch device 6 by configuring a battery unit 5, and is connected to the amplifier circuit module 42 (Amp1 to Amp6, a total of six groups) through a booster 51 and a relay 52, and by operating the relay 52. It can provide 25V power when it is activated, and the signal generating module 41 uses AD9833 to generate high-frequency signals, and the amplifying circuit module 42 increases the amplitude of the signal. As mentioned above, eighteen ultrasonic transmitting devices 2 (US1 to US18, 18 in total) Each group of three is used to receive the aforementioned six groups of amplifying circuit modules 42 respectively, so as to transmit high-decibel (about 90 decibel) ultrasonic interference signals to achieve its interference effect. For the power supply of the processing unit 4, a step-down device 61 is arranged between the switching device 6 and the processing unit 4, so as to provide 5V power to drive the processing unit 4; and the driving device 3 is also coupled to It is connected to the processing unit 4, so that the carrier 1 can be rotated and driven when it is activated; in terms of its switch configuration, the switch device 6 can be an external key switch. In a preferred embodiment, a human body can be used. The infrared sensing device (PIR) can facilitate the opening and closing of the creation by automatic sensing, so as to improve the convenience in use; and the relevant parameter setting of the ultrasonic emitting device 2 can be configured in the processing unit 4 with a The communication module 7, in one embodiment, can be configured as a Universal Asynchronous Receiver/Transmitter (UART) to be connected via Wi-Fi, and communicate with the MQTT (Message Queue Telemetry Transmission) protocol. Data transmission can be graphically displayed on a user interface through NodeRed, so as to facilitate the control of its related configuration and its parameters, but the above is only an example, not a limitation.

Therefore, in this creation, the parameters such as propagation speed, frequency, attenuation, spatial position, angle and time of the ultrasonic interference signal, as shown in Figure 5, are simulated through Matlab to generate the sound pressure level (Sound Pressure Level). Level, SPL, in dB) spatial distribution of slow-playing dynamic films, and then converted into a spatial distribution map of A-weighted sound pressure level (A-weighted SPL, in dBA), and based on its simulation The result is to present the disturbable spatial distribution. The results are shown in Figure 6 to Figure 8. Then, through the Autodesk Inventor computer-aided design software, the configuration of the carrier 1 and the ultrasonic transmitting device 2 in this creation can be accurately distanced. and angle design.

Among them, those shown in Fig. 6A, Fig. 6B and Fig. 6C are when a single signal source is simulated to simultaneously transmit to the eighteen ultrasonic transmitting devices 2 of the annular three-dimensional array. The figures represent the top sectional views of the heights 1.1cm, 3.4cm and 5.6cm from the desktop, respectively.

When the signal source of the ultrasonic transmitting device 2 is changed, along the vertical direction of the carrier 1, one signal source is configured for every three ultrasonic transmitting devices 2, and the same total is 18 ultrasonic transmitting devices 2 to simulate the interleaving interference of six signal sources. The influence of the surrounding coverage distribution. Figure 7A shows a top sectional view at a height of 3.4 cm from the desktop, and Figure 7B shows a top sectional view at a height of 3.4 cm from the desktop. Rotate carrier 1 back and forth by degrees, and its coverage is more uniform than in Figure 7A.

In addition to the above-mentioned top view showing the omnidirectional interference intensity distribution results of the ultrasonic interference signal simulated by a single or multiple groups of signal sources; the simulation situation where a single signal source is simultaneously transmitted to the eighteen ultrasonic transmitting devices 2 of the annular three-dimensional array is as described in Section 8A and Figure 8B, wherein, Figure 8A is a vertical cross-sectional sound wave distribution diagram presented by the carrier 1 placed on the desktop, and the interference distribution diagram of the six groups of ultrasonic transmitting devices 2 in the vicinity shown in Figure 8A is enlarged. It is shown that the orientation of the ultrasonic transmitting device 2 as shown in FIG. 8B and its interference intensity and coverage distribution in the three-dimensional space can be obtained.

In addition, referring to the noise standards of most urban environmental protection bureaus, 90 decibels are about the volume of construction sites, and most people think that this decibel will affect the conversation between speakers; The close-range measurement can reach 96 decibels. Due to the use of ultrasonic waves, it has no effect on the human ear at all, but for the radio module of the radio source, the shielding effect is quite significant.

As far as the interference verification of this creation is concerned, when the radio source is placed about 50cm away from the creative carrier 1, and the pure voice file for IBM voice-to-text purpose is played through the speaker (sound source) 20cm next to the radio source, the radio source is recorded separately. Create the unopened original sound and the disturbed sound when it is turned on. The test results are shown in Figure 9, where the waveform in the middle is the waveform of the original sound. In the case of no interference, for most words The recognition accuracy of speech-to-text is above 95%, and there are a few parts below 50%, which are within the normal speech recognition range; and after the interference of this creation, as shown in the external waveform, it will Including the amplitude of noise (ie ultrasonic interference signal), which can indicate that the original waveform has been obviously covered, so that the speech-to-text system cannot recognize any words at all, and from the waveform of the amplitude, the original waveform without interference is also It is almost destroyed, and its original waveform cannot be recognized, and the recognition rate through the IBM speech-to-text system is 0%, and no words can be recognized. It is obvious that the configuration of this creation can indeed interfere with the radio source, making it possible to achieve Those who prevent the effect of skimming.

Looking at the above, the technical means disclosed in this creation are not only unprecedented, but also can achieve the expected purpose and effect, so they are both novel and progressive, and they are indeed new and infallible under the patent law. In terms of structure, it has indeed met the statutory requirements of the Patent Law, and an application for a new type patent can be filed in accordance with the law.

However, the above are only the preferred embodiments of this creation, and should not be used as a limitation on the scope of implementation of this creation. within the scope of this creative patent.

1: carrier 11: Upper positioning surface 12: Middle positioning surface 13: Lower positioning surface 14: Bearing surface 2: Ultrasonic transmitting device 3: Drive device 4: Processing unit 41: Signal generation module 42: Amplifier circuit module 5: battery unit 51: Booster 52: Relay 6: Switchgear 61: Bucks 7: Communication module

Figure 1 is the system architecture diagram of this creation. Figure 2 is a three-dimensional schematic diagram of the creative carrier. Figure 3 is a schematic cross-sectional view of the creative carrier. Figure 4 is the received spectrum of the radio source in each frequency range of this creation. Fig. 5 is a flow chart of the execution simulation of this creation. Picture 6A is the top-view sound wave distribution of this creation on a section at a height of 1.1cm from the table top. Picture 6B is the top-view sound wave distribution of this creation on a section at a height of 3.4cm from the table top. Picture 6C is the top-view sound wave distribution of this creation on a section at a height of 5.6cm from the desktop. Figure 7A is a top sectional view of the multi-signal source at a height of 3.4cm from the desktop. Figure 7B is a top-view sound wave distribution created by the multi-signal source at a height of 3.4cm from the desktop and rotated back and forth 60 degrees. Figure 8A shows the sound wave distribution of the vertical section of this creation. Fig. 8B is an enlarged view of the acoustic wave distribution based on Fig. 8A. Figure 9 is a comparison diagram of the original voice and the waveform after being disturbed by the original creation during the verification.

2: Ultrasonic transmitting device

3: Drive device

4: Processing unit

41: Signal generation module

42: Amplifier circuit module

5: battery unit

51: Booster

52: Relay

6: Switchgear

61: Bucks

7: Communication module

Claims (9)

An intelligent conference anti-skimming interference device, comprising: a carrier; and at least one ultrasonic emitting device, which is configured on the carrier, and the ultrasonic emitting device is used for outputting frequency between a sound source and a sound receiver The ultrasonic interference signal between 20kHz and 30kHz shall cover the radio frequency range of the radio source, and the radio frequency range is between the low frequency and 3kHz. The intelligent conference anti-skimming interference device according to claim 1, wherein the frequency of the ultrasonic interference signal is between 24kHz and 26kHz. The intelligent conference anti-skimming interference device according to claim 1, wherein the ultrasonic interference signal is additive white Gaussian noise. The intelligent conference anti-skimming interference device according to any one of claim 1 to claim 3, wherein the carrier further forms an upper positioning surface, a middle positioning surface and a lower positioning surface from the top end to the bottom end, and the carrier is further formed with an upper positioning surface, a middle positioning surface and a lower positioning surface. The positioning surfaces have different inclination angles, and the positioning surfaces are respectively provided with at least one of the ultrasonic emitting devices. The intelligent conference anti-skimming interference device according to claim 4, wherein the upper positioning surface forms an angle of 35 degrees with a gravity direction, and the middle positioning surface forms an angle of 17.5 degrees with the gravity direction. , and the lower positioning surface is slightly parallel to the direction of gravity. According to the intelligent conference anti-skimming interference device according to claim 4, the carrier is further provided with a plurality of bearing surfaces, and the bearing surfaces are respectively provided with the upper positioning surface, the middle positioning surface and the lower positioning surface, and the The bearing surface is laterally surrounding that which forms the carrier. The intelligent conference anti-skimming interference device according to claim 4, further comprising a driving device, which is correspondingly connected to and rotationally drives the carrier. The intelligent conference anti-skimming interference device according to any one of claim 1 to claim 3, further comprising a processing unit coupled to a signal generating module, and the signal generating module is connected with at least one amplifying circuit modules, and the ultrasonic emitting device is correspondingly connected to at least one of the amplifying circuit modules. The intelligent conference anti-skimming interference device according to claim 8, further comprising a driving device coupled to the processing unit, and the driving device is correspondingly connected to and rotationally drives the carrier.

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