Nuclear electromagnetic pulse audio signal protection device

Abstract

The utility model relates to a nuclear electromagnetic pulse audio signal protection device, which relates to the field of electromagnetic pulse protection devices, and comprises a positive electrode audio signal circuit, a negative electrode audio signal circuit, a power supply circuit, a passive protection circuit and an active protection circuit, wherein the active protection circuit comprises an ultrahigh frequency triode Q1, a sampling resistor R6 and a divider resistor R7, the collector electrode of the Q1 is connected with the second end of the KEY1, the emitter electrode of the Q1 is connected with a negative electrode audio signal, the base electrode of the Q1 is respectively connected with the first end of the R6 and the first end of the R7, the second end of the R6 is connected with the second end of the L1, and the second end of the R7 is connected with the negative electrode audio signal. A passive protection and active protection combined method is adopted, so that the defects of passive nuclear electromagnetic pulses are overcome, and pulse energy can be prevented from damaging protection devices and protection equipment.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic pulse protection devices, and in particular to a nuclear electromagnetic pulse audio signal protection device. Background Art

[0002] Nuclear electromagnetic pulse is a strong electromagnetic pulse generated by a nuclear explosion or some high-energy physical process. This pulse can release huge energy in a short period of time, causing serious interference and damage to electronic equipment. Since audio signals are usually transmitted and processed by electronic devices, the threat of nuclear electromagnetic pulse to audio signals cannot be ignored.

[0003] The existing technology's protection measures against nuclear electromagnetic pulses are all passive, with the components in the circuit that resist nuclear electromagnetic pulses absorbing the pulses or directing the pulses to the ground. The passive protection device has a simple structure and relies entirely on the protection components to absorb the pulse energy. When the pulse capacity exceeds the upper limit of the protection component, the protection component is in a saturated state and cannot absorb excess energy, which will directly damage the protection component and transmit the excess energy to the next stage, causing damage to the protected equipment. Utility Model Content

[0004] The nuclear electromagnetic pulse audio signal protection device provided in this application adopts the following technical solution:

[0005] A nuclear electromagnetic pulse audio signal protection device, comprising:

[0006] A positive audio signal circuit, comprising an inductor L1, a decoupling resistor R1, a coil switch KEY1 and a decoupling resistor R4 connected in series in sequence, wherein a first end of L1 is connected to a positive audio signal;

[0007] A negative audio signal circuit, comprising a resistor R3 and a resistor R5 connected in series, wherein R3 is connected to the negative audio signal;

[0008] A power supply circuit, comprising a current limiting resistor R2 and a power supply BAT1, wherein a first end of R2 is connected in parallel between L1 and R1, a positive electrode of BAT1 is connected to a second end of R2, a negative electrode of BAT1 is connected to a negative audio signal, and a positive electrode of BAT1 is connected to a first end of KEY1;

[0009] The active protection circuit includes an ultra-high frequency transistor Q1, a sampling resistor R6 and a voltage-dividing resistor R7, wherein the collector of Q1 is connected to the second end of KEY1, the emitter of Q1 is connected to the negative audio signal, the base of Q1 is connected to the first end of R6 and the first end of R7 respectively, the second end of R6 is connected to the second end of L1, and the second end of R7 is connected to the negative audio signal.

[0010] In one embodiment, the passive protection circuit includes a transient suppression protection diode D1, a varistor C1, a gas discharge tube G1, a transient suppression protection diode D2, a varistor C2, and a gas discharge tube G2, the KEY1 is connected in parallel to D1, C1, and G1, the R3 is connected in parallel to D2, C2, and G2, and the common end of D1, C1, G1, D2, C2, and G2 is connected in parallel to the ground end.

[0011] The nuclear electromagnetic pulse audio signal protection device provided by the embodiment of the present disclosure can achieve the following technical effects:

[0012] The combination of passive protection and active protection makes up for the shortcomings of passive nuclear electromagnetic pulse. The active protection circuit is in a continuous monitoring state. When the nuclear electromagnetic pulse energy is low, the active protection circuit does not work, and the passive protection circuit handles the nuclear electromagnetic pulse. When the active protection circuit detects that the nuclear electromagnetic pulse energy exceeds the limit that the passive circuit can withstand, the active protection circuit is activated to isolate the audio signal. This helps prevent the pulse energy from damaging the protection components and equipment.

[0013] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the nuclear electromagnetic pulse audio signal protection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0016] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0017] The following is combined with Figure 1 This application is described in further detail.

[0018] A nuclear electromagnetic pulse audio signal protection device comprises: a positive audio signal circuit, a negative audio signal circuit, a power supply circuit, a passive protection circuit and an active protection circuit.

[0019] The positive audio signal circuit includes an inductor L1, a decoupling resistor R1, a coil switch KEY1 and a decoupling resistor R4 connected in series, and the first end of L1 is connected to the positive audio signal. The negative audio signal circuit includes a resistor R3 and a resistor R5 connected in series, and R3 is connected to the negative audio signal.

[0020] The power circuit includes a current limiting resistor R2 and a power supply BAT1, a first end of R2 is connected in parallel between L1 and R1, a positive electrode of BAT1 is connected to a second end of R2, a negative electrode of BAT1 is connected to a negative audio signal, and a positive electrode of BAT1 is connected to a first end of KEY1.

[0021] The active protection circuit includes an ultra-high frequency transistor Q1, a sampling resistor R6 and a voltage divider resistor R7, the collector of Q1 is connected to the second end of KEY1, the emitter of Q1 is connected to the negative audio signal, the base of Q1 is connected to the first end of R6 and the first end of R7 respectively, the second end of R6 is connected to the second end of L1, and the second end of R7 is connected to the negative audio signal.

[0022] The core control part of the active protection circuit is completed by the ultra-high frequency transistor Q1. Q1 is an npn transistor, which is turned on when the level is high. The base of Q1 collects the nuclear electromagnetic pulse energy through the sampling resistor R6 and the voltage divider resistor R7. When the pulse energy is lower than the set threshold, the transistor Q1 is in the off state and the coil switch KEY1 is in the off state. The audio signal is transmitted to the passive protection circuit; when the pulse energy is greater than the set threshold, the transistor Q1 and the coil switch KEY1 are in the open state. The audio signal and the passive protection circuit are in an isolated state.

[0023] The combination of passive protection and active protection makes up for the shortcomings of passive nuclear electromagnetic pulse. The active protection circuit is in a continuous monitoring state. When the nuclear electromagnetic pulse energy is low, the active protection circuit does not work, and the passive protection circuit handles the nuclear electromagnetic pulse. When the active protection circuit detects that the nuclear electromagnetic pulse energy exceeds the limit that the passive circuit can withstand, the active protection circuit is activated to isolate the audio signal. This helps prevent the pulse energy from damaging the protection components and equipment.

[0024] Since there are two levels of protection, passive protection circuit and active protection circuit, when designing the passive protection circuit, selecting devices with relatively weak signal attenuation helps reduce the impact on the audio signal.

[0025] In one embodiment, the passive protection circuit includes a transient suppression protection diode D1, a varistor C1, a gas discharge tube G1, a transient suppression protection diode D2, a varistor C2, a gas discharge tube G2, KEY1 is connected in parallel to D1, C1 and G1, R3 is connected in parallel to D2, C2 and G2, and the common end of D1, C1, G1, D2, C2 and G2 is connected to the ground end.

[0026] The passive protection circuit does not work when a normal signal passes through. When the nuclear electromagnetic pulse energy is between 10W / cm2 and 100W / cm2, the device is turned on to conduct the nuclear electromagnetic pulse interference signal to the ground.

[0027] The working process of the nuclear electromagnetic pulse audio signal protection device is as follows: after the device starts working, the audio signal passes through the audio input device, and the device determines the energy size of the nuclear electromagnetic pulse. When the pulse energy is less than 100W / cm2, the active protection circuit is in the closed state, and the passive protection circuit works, and the signal after eliminating the nuclear electromagnetic pulse interference is output through the audio output port; when the pulse energy is greater than 100W / cm2, the active protection circuit is in the open state, cutting off the output audio signal, and forming a physical isolation state with the subsequent equipment. When the pulse energy recovers to below 100W / cm2, the active protection circuit is turned off, and the passive protection circuit continues to work to eliminate the nuclear electromagnetic pulse.

[0028] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A nuclear electromagnetic pulse audio signal protection device, comprising a passive protection circuit, characterized in that: Also includes: A positive audio signal circuit, comprising an inductor L1, a decoupling resistor R1, a coil switch KEY1 and a decoupling resistor R4 connected in series in sequence, wherein a first end of L1 is connected to a positive audio signal; A negative audio signal circuit, comprising a resistor R3 and a resistor R5 connected in series, wherein R3 is connected to the negative audio signal; A power supply circuit, comprising a current limiting resistor R2 and a power supply BAT1, wherein a first end of R2 is connected in parallel between L1 and R1, a positive electrode of BAT1 is connected to a second end of R2, a negative electrode of BAT1 is connected to a negative audio signal, and a positive electrode of BAT1 is connected to a first end of KEY1; An active protection circuit includes an ultra-high frequency transistor Q1, a sampling resistor R6 and a voltage-dividing resistor R7, wherein the collector of Q1 is connected to the second end of KEY1, the emitter of Q1 is connected to the negative audio signal, the base of Q1 is connected to the first end of R6 and the first end of R7 respectively, the second end of R6 is connected to the second end of L1, and the second end of R7 is connected to the negative audio signal.

2. The nuclear electromagnetic pulse audio signal protection device according to claim 1 is characterized in that: The passive protection circuit includes a transient suppression protection diode D1, a varistor C1, a gas discharge tube G1, a transient suppression protection diode D2, a varistor C2, and a gas discharge tube G2. The KEY1 is connected in parallel to D1, C1, and G1. The R3 is connected in parallel to D2, C2, and G2. The common end of D1, C1, G1, D2, C2, and G2 is connected in parallel to the ground end.

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