Hacker-prevention microphone forbidding circuit of intelligent voice sound box

Abstract

The invention discloses an anti-hacking microphone forbidding circuit of an intelligent voice sound box. The anti-hacking microphone forbidding circuit comprises an MCU, a key circuit, a switching circuit, a Mic circuit and a power supply circuit, the MCU is electrically connected with the key circuit, the power supply circuit and the switching circuit respectively; the switching circuit is connected between the power supply circuit and the MIC circuit; and the MCU controls the on / off of the switching circuit according to the obtained input signal of the key circuit so as to connect or disconnect the connection between the power supply circuit and the Mic circuit. By implementing the method and the device, sensitive privacy information can be timely prevented from being intercepted through the MIC of the product, the cost is low, the power consumption is low, safety and reliability are realized, and the problem that the privacy information of a user is leaked due to the fact that voice information acquired by the MIC of an existing intelligent voice product is easily intercepted by a hacker is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of microphone banning of intelligent voice, and in particular to an anti-hacker microphone banning circuit of an intelligent voice speaker. Background Art

[0002] With the widespread application of smart voice speakers and the promotion of A1 technology, smart speakers are everywhere in people's living areas or office areas. Smart speakers belong to the call products, and generally choose digital microphones (MIC). Digital microphones transmit digital signals and have strong anti-interference capabilities. They can achieve better results than analog microphones such as electrets in complex electromagnetic environments such as mobile phones, tablets, Bluetooth conference speakers and other devices with RF communication and high-speed digital circuits.

[0003] As information interaction between man-machine (MIC) and network server (cloud) becomes more and more frequent, the MIC of intelligent voice products is in a monitoring state under normal circumstances while information is being delivered. If the information is not encrypted or authorized and is directly exposed, it is very easy for important information to be intercepted by network hackers, leading to immeasurable serious consequences.

[0004] Therefore, there is an urgent need for a network security anti-black MIC ban circuit to prevent sensitive information from being intercepted through the product's MIC in a timely manner according to user needs. Summary of the invention

[0005] Existing intelligent voice products are easily intercepted by hackers through the MIC, resulting in the leakage of user privacy information.

[0006] In view of the above problems, an anti-hacker microphone ban circuit for an intelligent voice speaker is proposed. By setting a key circuit, a switch circuit and an MCU, the MCU controls the switch circuit to turn on or off according to the input signal of the key circuit to turn on or off the connection between the power circuit and the Mic circuit, thereby timely avoiding sensitive privacy information from being intercepted through the MIC of the product. The anti-hacker microphone ban circuit in the present invention has low cost, low power consumption, and is safe and reliable, which solves the problem that existing intelligent voice products are easily intercepted by hackers to obtain voice information obtained by the MIC, resulting in the leakage of user privacy information.

[0007] An anti-hacking microphone-banning circuit for an intelligent voice speaker, comprising:

[0008] MCU;

[0009] Button circuit;

[0010] Switching circuit;

[0011] Mic circuit;

[0012] Power supply circuit;

[0013] The MCU is electrically connected to the key circuit, the power circuit and the switch circuit respectively;

[0014] The switch circuit is connected between the power supply circuit and the MIC circuit;

[0015] The MCU controls the on or off of the switch circuit according to the input signal obtained from the key circuit, so as to turn on or off the connection between the power circuit and the Mic circuit.

[0016] In conjunction with the anti-hacker microphone ban circuit of the intelligent voice speaker of the present invention, in a first possible implementation manner, the button circuit includes:

[0017] Operation buttons;

[0018] Status indicator light;

[0019] The status indicator light and the operation button are electrically connected to the first pin and the second pin of the MCU respectively;

[0020] The operation button is used to input an operation instruction signal, and the status indicator light is used to display the button status.

[0021] In combination with the first possible implementation manner of the present invention, in a second possible implementation manner, the switch circuit is a MOS tube switch circuit.

[0022] In combination with the second possible implementation manner of the present invention, in a third possible implementation manner, the MOS transistor switch circuit includes:

[0023] MOS tube, a first resistor, a second resistor, and a first capacitor;

[0024] The first end of the first resistor is electrically connected to the third pin of the MCU, and the second end is electrically connected to the first end of the second resistor, the first end of the first capacitor and the gate of the MOS tube;

[0025] The second end of the second resistor, the second end of the first capacitor, and the source of the MOS tube are connected together and then electrically connected to the power supply circuit;

[0026] The drain of the MOS tube is electrically connected to the Mic circuit.

[0027] In conjunction with the anti-hacker microphone ban circuit of the intelligent voice speaker of the present invention, in a fourth possible implementation manner, the power supply circuit includes:

[0028] Input unit;

[0029] Conversion chip;

[0030] Output unit;

[0031] The input unit is electrically connected to the conversion chip and is used to input a 5V voltage;

[0032] The conversion chip is used to convert the 5V voltage into a 3.3V voltage;

[0033] The output unit is electrically connected to the conversion chip and is used to output the 3.3V voltage to various circuits.

[0034] In combination with the fourth possible implementation manner of the present invention, in a fifth possible implementation manner, the input unit includes:

[0035] A second capacitor and a third capacitor;

[0036] The first ends of the second capacitor and the third capacitor are grounded, and the second ends are electrically connected to the input power supply and the first pin of the conversion chip.

[0037] In combination with the fifth possible implementation manner of the present invention, in a sixth possible implementation manner, the output unit includes:

[0038] A first inductor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a third resistor, a fourth resistor and a fifth resistor;

[0039] The first end of the first inductor is electrically connected to the second pin of the conversion chip, and the second end is commonly connected to the first ends of the fourth capacitor, the fifth capacitor, the sixth capacitor, the seventh capacitor, the fourth resistor, and the fifth resistor;

[0040] The second ends of the fourth capacitor, the fifth capacitor and the sixth capacitor are connected to the ground together with the first end of the third resistor, and the second ends of the fourth resistor and the seventh capacitor are connected to the second end of the third resistor and then electrically connected to the third pin of the conversion chip;

[0041] The second end of the fifth resistor is connected to the output end.

[0042] In conjunction with the anti-hacking microphone ban circuit of the intelligent voice speaker of the present invention, in a seventh possible implementation manner, the Mic circuit includes:

[0043] A first Mic circuit, a second Mic circuit and a third Mic circuit;

[0044] The power input terminals of the first Mic circuit, the second Mic circuit and the third Mic circuit are electrically connected to the output terminal of the switch circuit.

[0045] In conjunction with the anti-hacking microphone ban circuit of the intelligent voice speaker of the present invention, in an eighth possible implementation manner, the MCU includes:

[0046] Processing unit;

[0047] The processing unit is used to convert the input key signal into a high level signal or a low level signal to control the on or off of the switch circuit.

[0048] In combination with the eighth possible implementation manner of the present invention, in a ninth possible implementation manner, the MCU further includes:

[0049] Counting unit;

[0050] The processing unit is used to count the number of key operations and mark them according to the sequence.

[0051] The anti-hacker microphone ban circuit of the smart voice speaker of the present invention is implemented by setting a key circuit, a switch circuit and an MCU. The MCU controls the switch circuit to turn on or off according to the input signal of the key circuit to turn on or off the connection between the power circuit and the Mic circuit, thereby timely avoiding sensitive privacy information from being intercepted through the MIC of the product. The anti-hacker microphone ban circuit of the present invention has low cost, low power consumption, and is safe and reliable, which solves the problem that the existing smart voice products are easily intercepted by hackers to obtain the voice information obtained by the MIC, resulting in the leakage of the user's privacy information. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0053] Figure 1 This is a connection diagram of an anti-hacking microphone-banning circuit module of an intelligent voice speaker in the present invention;

[0054] Figure 2 It is a schematic diagram of the circuit structure of the key circuit and MCU in the present invention;

[0055] Figure 3 is a schematic diagram of the circuit structure of the power supply circuit in the present invention;

[0056] Figure 4 is a schematic diagram of the circuit structure of the switch circuit in the present invention;

[0057] Figure 5 It is a schematic diagram of the circuit structure of the Mic circuit in the present invention. DETAILED DESCRIPTION

[0058] The following will be combined with the accompanying drawings in the invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0060] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0061] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0063] Existing intelligent voice products are easily intercepted by hackers through the MIC, resulting in the leakage of user privacy information.

[0064] In view of the above problems, an anti-hacking microphone ban circuit for an intelligent voice speaker is proposed.

[0065] An anti-hacker microphone ban circuit for an intelligent voice speaker, such as Figure 1 , Figure 1The present invention is a schematic diagram of the connection of the anti-hacking microphone-banning circuit module of the intelligent voice speaker; it includes MCU100, key circuit 200, switch circuit 400, Mic circuit 500, and power circuit 300; MCU100 is electrically connected to the key circuit 200, the power circuit 300, and the switch circuit 400 respectively; the switch circuit 400 is connected between the power circuit 300 and the MIC circuit 500; MCU100 controls the switch circuit 400 to turn on or off the connection between the power circuit 300 and the Mic circuit 500 by obtaining the input signal of the key circuit 200. By setting the key circuit 200, the switch circuit 400, and the MCU100, the MCU100 controls the switch circuit 400 to turn on or off the connection between the power circuit 300 and the Mic circuit 500 by obtaining the input signal of the key circuit 200, thereby timely avoiding sensitive privacy information from being intercepted through the MIC of the product. The anti-hacker microphone ban circuit of the present invention has low cost, low power consumption, and is safe and reliable, and solves the problem that existing intelligent voice products are easily intercepted by hackers and the voice information obtained by the MIC leads to the leakage of user privacy information.

[0066] In this embodiment, the power circuit 300 provides power for the entire circuit, and the key circuit 200 is used for the user to generate a microphone-disabled / microphone-enabled signal to the MCU100. The product is powered on by default in the microphone-enabled state (the MOS tube is in the on state). When a key in the key circuit 200 is pressed, a pulse signal from a high level to a low level is generated and given to the MCU100. After the processing unit of the MCU100 performs anti-shake and signal processing, a low level is output to control the MOS tube to open the circuit, thereby disconnecting the 3.3V power supply of the MIC circuit 500 to achieve the microphone-disabled effect. At the same time, the MCU100 will mark The MIC is in the disabled state (the counting unit identifies it as "1"). When a key is pressed next time, a pulse signal from low level to high level will be generated and given to MCU100. After the processing unit of MCU100 performs anti-shake and signal processing, it outputs a high level to control the MOS tube to conduct, thereby turning on the 3.3V power supply of the MIC circuit 500 to achieve the effect of opening the microphone. At the same time, MCU100 will mark the MIC as being in the open state (the counting unit identifies it as "0"). The next time the key circuit 200 is pressed, the cyclic detection will be carried out to realize the disabled / open microphone function.)

[0067] In this embodiment, the power module uses a DC-DC circuit to convert a 5V DC voltage into a 3.3V DC voltage.

[0068] like Figure 2 , Figure 2Schematic diagram of the circuit structure of the key circuit 200 and MCU100 in the present invention, the key circuit 200 includes an operation key (MUTE_BUTTON) and a status indicator light (MUTE_STATE_L); the status indicator light (MUTE_STATE_L) and the operation key (MUTE_BUTTON) are electrically connected to the first pin (PA1) and the second pin (PA2) of the MCU100 respectively; the operation key (MUTE_BUTTON) is used to input an operation command signal, and the status indicator light (MUTE_STATE_L) is used to display the status of the operation key (MUTE_BUTTON).

[0069] like Figure 4 , Figure 4 Schematic diagram of the circuit structure of the switch circuit in the present invention; the switch circuit 400 is a MOS tube Q1 switch circuit 400.

[0070] Specifically, the MOS transistor Q1 switch circuit 400 includes a MOS transistor Q1, a first resistor R1, a second resistor R2, and a first capacitor C1; a first end of the first resistor R1 is electrically connected to the third pin (PA4) of the MCU100, and a second end is electrically connected to a first end of the second resistor R2, a first end of the first capacitor C1, and a gate of the MOS transistor Q1; a second end of the second resistor R2, a second end of the first capacitor C1, and a source of the MOS transistor Q1 are connected together and electrically connected to the power supply circuit 300; a drain of the MOS transistor Q1 is electrically connected to the Mic circuit 500.

[0071] like Figure 3 , Figure 3 Schematic diagram of the circuit structure of the power supply circuit 300 in the present invention; the power supply circuit 300 includes an input unit 310, a conversion chip U2, and an output unit 320; the input unit 310 is electrically connected to the conversion chip U2 for inputting a 5V voltage; the conversion chip U2 is used to convert the 5V voltage into a 3.3V voltage; the output unit 320 is electrically connected to the conversion chip U2 for outputting a 3.3V voltage to each circuit.

[0072] Specifically, the input unit includes a second capacitor C2 and a third capacitor C3; the first ends of the second capacitor C2 and the third capacitor C3 are grounded, and the second ends are electrically connected to the input power supply and the first pin (IN) of the conversion chip U2.

[0073] Specifically, the output unit includes:

[0074] The first inductor L1, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7, the third resistor R3, the fourth resistor R4 and the fifth resistor R5; the first inductor L1, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7, the third resistor R3, the fourth resistor R4 and the fifth resistor R5; the first end of the first inductor L1 is electrically connected to the second pin (LX) of the conversion chip, and the second end is commonly connected to the first ends of the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7, the fourth resistor R4 and the fifth resistor R5; the second ends of the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6 and the sixth capacitor C6 are commonly grounded with the first end of the third resistor R3, and the second ends of the fourth resistor R4 and the seventh capacitor C7 are commonly connected to the second end of the third resistor R3 and then electrically connected to the third pin (FB) of the conversion chip U2; the second end of the fifth resistor R5 is connected to the output end.

[0075] Further, such as Figure 5 , Figure 5 Schematic diagram of the circuit structure of the Mic circuit in the present invention. The Mic circuit includes: a first Mic circuit 510, a second Mic circuit 520 and a third Mic circuit 530; the power supply ends of the first Mic circuit 510, the second Mic circuit 520 and the third Mic circuit 530 are electrically connected to the output end of the switch circuit 400 respectively.

[0076] Furthermore, the MCU 100 includes a processing unit; the processing unit is used to convert the input key signal into a high level signal or a low level signal to control the on or off of the switch circuit 400 .

[0077] Furthermore, the MCU 100 also includes a counting unit; the processing unit is used to count the number of key operations and mark them according to the sequence.

[0078] The anti-hacker microphone ban circuit of the smart voice speaker of the present invention is implemented by setting a key circuit 200, a switch circuit 400 and an MCU100. The MCU100 controls the switch circuit 400 to turn on or off the connection between the power circuit 300 and the Mic circuit 500 according to the input signal of the key circuit 200, so as to timely avoid sensitive privacy information from being intercepted through the MIC of the product. The anti-hacker microphone ban circuit in the present invention has low cost, low power consumption, and is safe and reliable, which solves the problem that the existing smart voice products are easily intercepted by hackers to obtain the voice information obtained by the MIC, resulting in the leakage of the user's privacy information.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-hacker microphone ban circuit for an intelligent voice speaker, characterized in that it includes: MCU; Button circuit; Switching circuit; Mic circuit; Power supply circuit; The MCU is electrically connected to the key circuit, the power circuit and the switch circuit respectively; The switch circuit is connected between the power circuit and the Mic circuit; The MCU controls the on or off of the switch circuit according to the input signal obtained from the key circuit, so as to turn on or off the connection between the power circuit and the Mic circuit.

2. The anti-hacking microphone ban circuit of the intelligent voice speaker according to claim 1, characterized in that: The key circuit comprises: Operation buttons; Status indicator light; The status indicator light and the operation button are electrically connected to the first pin and the second pin of the MCU respectively; The operation button is used to input an operation instruction signal, and the status indicator light is used to display the button status.

3. The anti-hacking microphone ban circuit of the intelligent voice speaker according to claim 2, characterized in that: The switch circuit is a MOS tube switch circuit.

4. The anti-hacking microphone ban circuit of the intelligent voice speaker according to claim 3, characterized in that: The MOS tube switch circuit comprises: MOS tube, a first resistor, a second resistor, and a first capacitor; The first end of the first resistor is electrically connected to the third pin of the MCU, and the second end is electrically connected to the first end of the second resistor, the first end of the first capacitor and the gate of the MOS tube; The second end of the second resistor, the second end of the first capacitor, and the source of the MOS tube are connected together and then electrically connected to the power supply circuit; The drain of the MOS tube is electrically connected to the Mic circuit.

5. The anti-hacking microphone ban circuit of the intelligent voice speaker according to claim 1, characterized in that: The power supply circuit comprises: Input unit; Conversion chip; Output unit; The input unit is electrically connected to the conversion chip and is used to input a 5V voltage; The conversion chip is used to convert the 5V voltage into a 3.3V voltage; The output unit is electrically connected to the conversion chip and is used to output the 3.3V voltage to various circuits.

6. The anti-hacking microphone ban circuit of the intelligent voice speaker according to claim 5, characterized in that: The input unit comprises: A second capacitor and a third capacitor; The first ends of the second capacitor and the third capacitor are grounded, and the second ends are electrically connected to the input power supply and the first pin of the conversion chip.

7. The anti-hacking microphone ban circuit of the intelligent voice speaker according to claim 6, characterized in that: The output unit comprises: A first inductor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a third resistor, a fourth resistor and a fifth resistor; The first end of the first inductor is electrically connected to the second pin of the conversion chip, and the second end is commonly connected to the first ends of the fourth capacitor, the fifth capacitor, the sixth capacitor, the seventh capacitor, the fourth resistor, and the fifth resistor; The second ends of the fourth capacitor, the fifth capacitor and the sixth capacitor are connected to the ground together with the first end of the third resistor, and the second ends of the fourth resistor and the seventh capacitor are connected to the second end of the third resistor and then electrically connected to the third pin of the conversion chip; The second end of the fifth resistor is connected to the output end.

8. The anti-hacking microphone ban circuit of the intelligent voice speaker according to claim 1, characterized in that: The Mic circuit comprises: A first Mic circuit, a second Mic circuit and a third Mic circuit; The power input terminals of the first Mic circuit, the second Mic circuit and the third Mic circuit are electrically connected to the output terminal of the switch circuit.

9. The anti-hacking microphone ban circuit of the intelligent voice speaker according to claim 1, characterized in that: The MCU includes: Processing unit; The processing unit is used to convert the input key signal into a high level signal or a low level signal to control the on or off of the switch circuit.

10. The anti-hacking microphone ban circuit of the intelligent voice speaker according to claim 9, characterized in that: The MCU further comprises: Counting unit; The processing unit is used to count the number of key operations and mark them according to the sequence.

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