CN219811243U - Multi-voice signal input type civil air defense alarm intermediate controller - Google Patents
Multi-voice signal input type civil air defense alarm intermediate controller Download PDFInfo
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Abstract
The utility model relates to the technical field of civil air defense alarms and provides a multi-voice signal input type civil air defense alarm intermediate controller which comprises an alarm monitoring circuit, wherein the alarm monitoring circuit comprises a resistor R50, an operational amplifier U26C, a resistor R41, an audio amplifier U14 and a monitoring loudspeaker, a first end of the resistor R50 is used as an input end of a first audio signal, a second end of the resistor R50, a second end of the resistor R49, a second end of the resistor R42 and a second end of the resistor R213 are all connected with an inverting input end of the operational amplifier U26C, a non-inverting input end of the operational amplifier U26C is connected with a 1.65V power supply, an output end of the operational amplifier U26C is connected with the inverting input end of the operational amplifier U26C through the resistor R41, a non-inverting input end of the audio amplifier U14 is grounded, a first output end of the audio amplifier U14 is connected with a first end of the monitoring loudspeaker, and a second output end of the audio amplifier U14 is connected with a second end of the monitoring loudspeaker. By the technical scheme, the problem that the monitoring circuit in the prior art is complex in structure is solved.
Description
Technical Field
The utility model relates to the technical field of civil air defense alarms, in particular to a multi-voice signal input type civil air defense alarm intermediate controller.
Background
With the continuous development of network technology and multimedia technology, the requirements of civil air defense departments on communication alarm systems are also higher and higher, and alarm reporting means and reporting contents are continuously perfected. The communication alarm terminal is developed from sound to voice, text, image and video multimedia, and from sound alarm and electric alarm to multimedia communication terminal. The multimedia alarm reporting system is a novel civil air defense alarm system and consists of a central station controller, an intermediate controller, a sub-controller, an alarm control management system, an information release system, a loudspeaker, a multimedia alarm terminal and the like, wherein the intermediate controller serves as a bridge of the civil air defense alarm system and plays an important role in the whole alarm system, a monitoring circuit is usually arranged in the intermediate controller to ensure reliable transmission of alarm reporting contents, whether an alarm signal is normally sent or not is monitored, and the structure of the monitoring circuit is complex in the existing intermediate controller, so that the monitoring effect is poor.
Disclosure of Invention
The utility model provides a multi-voice signal input type civil air defense alarm intermediate controller, which solves the problem of complex structure of a monitoring circuit in the prior art.
The technical scheme of the utility model is as follows:
the multi-voice signal input type civil air defense alarm intermediate controller comprises an alarm monitoring circuit, wherein the alarm monitoring circuit comprises a resistor R50, a resistor R49, a resistor R42, a resistor R213, an operational amplifier U26C, a resistor R41, an audio amplifier U14 and a monitoring loudspeaker,
the first end of the resistor R50 is used as the input end of a first audio signal, the first end of the resistor R49 is used as the input end of a second audio signal, the first end of the resistor R42 is used as the input end of a third audio signal, the first end of the resistor R213 is used as the input end of a fourth audio signal, the second end of the resistor R50, the second end of the resistor R49, the second end of the resistor R42 and the second end of the resistor R213 are all connected with the inverting input end of the operational amplifier U26C, the non-inverting input end of the operational amplifier U26C is connected with a 1.65V power supply, the output end of the operational amplifier U26C is connected with the inverting input end of the operational amplifier U26C through the resistor R41, the input end of the operational amplifier U26C is connected with the inverting input end of the audio amplifier U14, the first output end of the audio amplifier U14 is connected with the first end of the speaker, and the second output end of the audio amplifier U14 is connected with the second speaker.
Further, the utility model further comprises a main control unit, the alarm monitoring circuit further comprises an electronic switch U2A, a resistor R73, a resistor R58 and a switch tube Q8, wherein the first end of the resistor R73 is used for being connected with the first output end of the main control unit, the second end of the resistor R73 is connected with the control end of the switch tube Q8, the first end of the switch tube Q8 is connected with a 5V power supply through the resistor R58, the second end of the switch tube Q8 is grounded, the first end of the switch tube Q8 is connected with the control end of the electronic switch U2A, the input end of the electronic switch U2A is connected with the output end of the operational amplifier U26C, and the output end of the electronic switch U2A is connected with the first end of the resistor R250.
Further, the alarm monitoring circuit in the present utility model further includes a digital potentiometer U15, a resistor R36, and a resistor R251, where a control input end of the digital potentiometer U15 is connected to the second output end of the main control unit, a selection input end of the digital potentiometer U15 is connected to the third output end of the main control unit, a high-resistance end of the digital potentiometer U15 is connected to the first end of the resistor R250 through the resistor R36, an adjustment end of the digital potentiometer U15 is connected to the second end of the resistor R250 through the resistor R251, and a low-resistance end of the digital potentiometer U15 is connected to a 1.65V power supply.
Further, the utility model also comprises a multi-path gating circuit, which comprises an analog switch U5, a resistor R44, a resistor R51, a resistor R209, a resistor R217 and a capacitor C57, wherein the enabling end of the analog switch U5, the first selecting end of the analog switch U5 and the second selecting end of the analog switch U5 are all connected with the main control unit, the first input end of the first channel of the analog switch U5 is used as the input end of the fifth audio signal, the second input end of the first channel of the analog switch U5 is connected with the first end of the resistor R250 through the resistor R44, the second input end of the first channel of the analog switch U5 is grounded through the resistor R51, the third input end of the first channel of the analog switch U5 is used as the input end of the second audio signal, the fourth input end of the first channel of the analog switch U5 is used as the input end of the first audio signal,
the output end of the first channel of the analog switch U5 is connected with the first end of the resistor R217 through the resistor R209, the second end of the resistor R217 is grounded, the first end of the resistor R217 is connected with the first end of the capacitor C57, and the second end of the capacitor C57 is used as the first output end of the multiplexing gating circuit.
Further, the multi-path gating circuit in the present utility model further includes a capacitor C22, a resistor R31, a resistor R27, an operational amplifier U26A, a resistor R18, a resistor R34, a capacitor C25, and a resistor R223, where a first end of the capacitor C22 is used as an input end of a fifth audio signal, a second end of the capacitor C22 is connected to an inverting input end of the operational amplifier U26A through the resistor R31, a non-inverting input end of the operational amplifier U26A is grounded through the resistor R34, a non-inverting input end of the operational amplifier U26A is connected to a 5V power supply through the resistor R18, an output end of the operational amplifier U26A is connected to the inverting input end of the operational amplifier U26A through the resistor R27, an output end of the operational amplifier U26A is connected to a first end of the resistor R223 through the capacitor C25, and a second end of the resistor R223 is connected to a first input end of the first channel of the analog switch U5.
Further, the utility model also includes a first microphone communication circuit, the first microphone communication circuit includes a capacitor C20 and a resistor R20, a first end of the capacitor C20 is used as an input end of the first microphone communication circuit, and a second end of the capacitor C20 is connected to an inverting input end of the op-amp U26A through the resistor R20.
Further, the utility model also comprises a second microphone communication circuit, wherein the second microphone communication circuit comprises a capacitor C7, a resistor R6, an operational amplifier U26B, a resistor R7 and a resistor R19, the first end of the capacitor C7 is used as the input end of the second microphone communication circuit, the second end of the capacitor C7 is connected with the inverting input end of the operational amplifier U26B through the resistor R6, the non-inverting input end of the operational amplifier U26B is connected with a 1.65V power supply, the output end of the operational amplifier U26B is connected with the inverting input end of the operational amplifier U26B through the resistor R7, and the output end of the operational amplifier U26B is connected with the inverting input end of the operational amplifier U26A through the resistor R19.
Further, the utility model also includes a headset communication control circuit, the headset communication control circuit includes a resistor R13, a switch tube Q2, a resistor R15, a resistor R11, a capacitor C21, a switch tube Q1, a resistor R21 and a resistor R32, the control end of the switch tube Q2 is grounded through the capacitor C21, the first end of the switch tube Q2 is connected to the first end of the capacitor C20 through the resistor R13, the second end of the switch tube Q2 is connected to the control end of the switch tube Q2 through the resistor R15, the second end of the switch tube Q2 is connected to a 12V power supply through the resistor R11, the second end of the switch tube Q2 is connected to the control end of the switch tube Q1, the first end of the switch tube Q1 is connected to the 12V power supply, the second end of the switch tube Q1 is connected to the first end of the resistor R32 through the resistor R21, the second end of the resistor R32 is grounded, and the first end of the resistor R32 is connected to the first input end of the master control unit.
The working principle and the beneficial effects of the utility model are as follows:
in the utility model, each path of alarm voice signals are monitored through the alarm monitoring circuit, and the received alarm voice signals are sent out through the monitoring loudspeaker, so that whether each path of alarm voice signals are normally communicated or not is judged.
In the utility model, the operational amplifier U26C forms an amplifying circuit, different resistors are connected in series at the inverting input end to amplify each path of alarm voice signal to a set value, when the first audio signal gives out the alarm voice signal, the alarm voice signal is sent to the inverting input end of the operational amplifier U26C through the resistor R50, the amplified signal is added to the inverting input end of the audio amplifier U14 after passing through a resistance-capacitance coupling circuit formed by the capacitor C90 and the resistor R116, the driving capability of the audio signal amplified by the operational amplifier U26C is still limited, and the monitoring loudspeaker cannot be directly driven to sound, so that the weak signal amplified at the front stage is amplified through the audio amplifier U14 to generate enough current to drive the monitoring loudspeaker to play back sound. Normally, when the radio station sends out an alarm voice signal, the monitoring loudspeaker monitors the alarm voice signal, and if the monitoring loudspeaker does not receive the alarm voice signal, the fault of the intermediate controller is indicated.
In the utility model, the intermediate controller can transmit various voice signals, the alarm monitoring circuit can monitor various voice signals, the first audio signal and the second audio signal are alarm signals from different radio stations respectively, the third audio signal is a recording alarm signal, the fourth audio signal is a word-to-voice alarm signal, and under normal conditions, any path of alarm voice signal can be monitored by the alarm monitoring circuit, so that the circuit structure of the alarm monitoring circuit is simple, can monitor multiple paths of voice input signals, and has good monitoring effect.
The utility model will be described in further detail with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a circuit diagram of an alarm monitor circuit according to the present utility model;
FIG. 2 is a circuit diagram of a multi-strobe circuit according to the present utility model;
FIG. 3 is a circuit diagram of a headset communication circuit according to the present utility model;
fig. 4 is a circuit diagram of a headset communication control circuit according to the present utility model.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1, this embodiment provides a multi-voice signal input type civil air defense alarm intermediate controller, which comprises an alarm monitoring circuit, wherein the alarm monitoring circuit comprises a resistor R50, a resistor R49, a resistor R42, a resistor R213, an operational amplifier U26C, a resistor R41, an audio amplifier U14 and a monitoring speaker, the first end of the resistor R50 is used as the input end of a first audio signal, the first end of the resistor R49 is used as the input end of a second audio signal, the first end of the resistor R42 is used as the input end of a third audio signal, the first end of the resistor R213 is used as the input end of a fourth audio signal, the second end of the resistor R50, the second end of the resistor R49, the second end of the resistor R42 and the second end of the resistor R213 are all connected with the inverting input end of the operational amplifier U26C, the non-inverting input end of the operational amplifier U26C is connected with a 1.65V power supply, the output end of the operational amplifier U26C is connected with the inverting input end of the operational amplifier U26C through the resistor R41, the output end of the operational amplifier U26C is connected with the inverting input end of the audio amplifier U14, the first end of the audio amplifier is connected with the first end of the audio amplifier 14, and the first end of the audio amplifier is connected with the first end of the audio amplifier 14 is connected with the first end of the audio amplifier is connected with the first end of the audio amplifier.
The alarm monitoring circuit is used for monitoring each path of alarm voice signals and sending the received alarm voice signals through the monitoring loudspeaker so as to judge whether each path of alarm voice signals are normally communicated.
In this embodiment, the intermediate controller may transmit a plurality of voice signals, and the alarm monitoring circuit may monitor a plurality of voice signals, where the first audio signal and the second audio signal are alarm voice signals from different radio stations respectively, the third audio signal is a recording alarm signal, and the fourth audio signal is a text-to-voice alarm signal, and under normal conditions, any path of the alarm voice signals are monitored by the alarm monitoring circuit when sending out the alarm voice signals.
The operational amplifier U26C forms an amplifying circuit, different resistors are connected in series at the inverting input end to amplify each path of alarm voice signal to a set value, when a radio station sends out the alarm voice signal, the alarm voice signal is sent to the inverting input end of the operational amplifier U26C through the resistor R50, the amplified signal is added to the inverting input end of the audio amplifier U14 after passing through a resistance-capacitance coupling circuit formed by the capacitor C90 and the resistor R116, the driving capability of the audio signal amplified by the operational amplifier U26C is still limited, and the audio amplifier U14 cannot be directly driven to sound, so that the audio amplifier U14 is connected between the output end of the operational amplifier U26C and the monitoring speaker, and the audio amplifier U14 is used for amplifying the weak signal amplified by the front stage to generate enough current to drive the monitoring speaker to play the role of playing sound. Normally, when the radio station sends out an alarm voice signal, the monitoring loudspeaker monitors the alarm voice signal, and if the monitoring loudspeaker does not receive the alarm voice signal, the fault of the intermediate controller is indicated.
In the embodiment, the alarm monitoring circuit has a simple circuit structure and good monitoring effect.
As shown in fig. 1, the alarm monitoring circuit further includes a main control unit, an electronic switch U2A, a resistor R73, a resistor R58, and a switch tube Q8, where a first end of the resistor R73 is connected to a first output end of the main control unit, a second end of the resistor R73 is connected to a control end of the switch tube Q8, a first end of the switch tube Q8 is connected to a 5V power supply through the resistor R58, a second end of the switch tube Q8 is grounded, a first end of the switch tube Q8 is connected to a control end of the electronic switch U2A, an input end of the electronic switch U2A is connected to an output end of the operational amplifier U26C, and an output end of the electronic switch U2A is connected to a first end of the resistor R250.
In this embodiment, when an alarm voice signal is to be notified, the main control unit receives the alarm signal simultaneously.
In order to solve the problem, in this embodiment, the operational amplifier U26C and the audio amplifier U14 are connected to the electronic switch U2A, when the alarm voice signal is to be notified, the main control unit outputs a high-level signal to the control end of the switch tube Q8, the switch tube Q8 is turned on, the control end of the electronic switch U2A is turned on, the electronic switch U2A is turned off, the output signal of the operational amplifier U26C can be sent to the input end of the audio amplifier U14, when the alarm voice signal is not to be notified, the main control unit outputs a low-level signal to the control end of the switch tube Q8, and the electronic switch U2A is turned off, so that the input end of the audio amplifier U14 has no signal input, and the monitor speaker cannot emit a noisy noise.
As shown in fig. 1, the alarm monitor circuit in this embodiment further includes a digital potentiometer U15, a resistor R36 and a resistor R251, the control input end of the digital potentiometer U15 is connected to the second output end of the main control unit, the selection input end of the digital potentiometer U15 is connected to the third output end of the main control unit, the high-resistance end of the digital potentiometer U15 is connected to the first end of the resistor R250 through the resistor R36, the adjustment end of the digital potentiometer U15 is connected to the second end of the resistor R250 through the resistor R251, and the low-resistance end of the digital potentiometer U15 is connected to the 1.65V power supply.
In this embodiment, the sound tuning circuit is added to the embodiment, and the sound tuning circuit is composed of a digital potentiometer U15, and the internal resistance of the digital potentiometer U15 is adjusted by the main control unit, so that the volume of the monitoring speaker is adjusted as required.
As shown in FIG. 2, the embodiment further includes a multi-path gating circuit, the multi-path gating circuit includes an analog switch U5, a resistor R44, a resistor R51, a resistor R209, a resistor R217 and a capacitor C57, the enabling end of the analog switch U5, the first selecting end of the analog switch U5 and the second selecting end of the analog switch U5 are all connected with the main control unit, the first input end of the first channel of the analog switch U5 is used as the input end of the fifth audio signal, the second input end of the first channel of the analog switch U5 is connected with the first end of the resistor R250 through the resistor R44, the second input end of the first channel of the analog switch U5 is grounded through the resistor R51, and the analog switch U5
The third input end of the first channel is used as the input end of the second audio signal, the fourth input end of the first channel of the analog switch U5 is used as the input end of the first audio signal, the output end of the first channel of the analog switch U5 is connected with the first end of the resistor R217 through the resistor R209, the second end of the resistor R217 is grounded, the first end of the resistor R217 is connected with the first end of the capacitor C57, and the second end of the capacitor C57 is used as the first output end of the multiplexing gating circuit.
In this embodiment, the multi-path gating circuit is configured to receive alarm voice signals from different stations, when any station sends an alarm voice signal, the main control unit controls the analog switch U5 to switch on a corresponding station, so that the alarm voice signal of the station is sent to the multimedia alarm terminal, the analog switch U5 includes a first channel and a second channel (X channel and Y channel), wherein the Y channel is used as a standby channel, the first channel is configured to receive a first audio signal, a second audio signal and a fifth audio signal, and the listening audio signal includes a third audio signal and a fourth audio signal, so that the multi-path gating circuit can receive multiple different alarm voice signals.
The second channel is used as a standby channel, and when special conditions occur in the first channel, the alarm voice signal can be transmitted through the second channel. And the alarm signal is ensured to be effectively and reliably transmitted to the multimedia terminal.
As shown in fig. 2, the multiplexing circuit of this embodiment further includes a capacitor C22, a resistor R31, a resistor R27, an operational amplifier U26A, a resistor R18, a resistor R34, a capacitor C25, and a resistor R223, where a first end of the capacitor C22 is used as an input end of the fifth audio signal, a second end of the capacitor C22 is connected to an inverting input end of the operational amplifier U26A through the resistor R31, a non-inverting input end of the operational amplifier U26A is grounded through the resistor R34, a non-inverting input end of the operational amplifier U26A is connected to a 5V power supply through the resistor R18, an output end of the operational amplifier U26A is connected to an inverting input end of the operational amplifier U26A through the resistor R27, and an output end of the operational amplifier U26A is connected to a first end of the resistor R223 through the capacitor C25, and a second end of the resistor R223 is connected to a first input end of the first channel of the analog switch U5.
In this embodiment, the fifth audio signal is an audio signal input through a line, for example, a mobile phone recording signal is transmitted to the multi-path gating circuit through a data line, but the signal strength of the mobile phone recording signal is weak, the loss of the signal in the circuit is large, so that the audio signal input through the line cannot be effectively transmitted, and therefore, the audio signal input through the line is required to be amplified, wherein the capacitor C22 and the resistor R31 form a coupling circuit to suppress an interference signal, then the coupled signal is sent to the inverting input end of the op amp U26A, the op amp U26A forms an amplifying circuit, and finally the amplified signal is sent to the first input end of the first channel of the analog switch U5, wherein the resistor R18 and the resistor R34 form a voltage dividing circuit, and a constant 1.65V voltage is output to the non-inverting input end of the op amp U26A, and the capacitor C25 plays a role of filtering.
As shown in fig. 3, the embodiment further includes a first microphone communication circuit, where the first microphone communication circuit includes a capacitor C20 and a resistor R20, a first end of the capacitor C20 is used as an input end of the first microphone communication circuit, and a second end of the capacitor C20 is connected to an inverting input end of the op-amp U26A through the resistor R20.
In this embodiment, the wireless communication device further includes a first microphone communication circuit, where the first microphone communication circuit transmits an alarm voice signal through a microphone or an interphone, and the first microphone communication circuit is provided with an external switch, and when the external switch is pressed, the first microphone communication circuit can send the alarm voice signal through the microphone or the interphone, and the alarm voice signal is coupled with the resistor R20 through the capacitor C20 and then sent to the inverting input end of the op-amp U26A and is output as a fifth audio signal.
As shown in fig. 3, the embodiment further includes a second microphone communication circuit, where the second microphone communication circuit includes a capacitor C7, a resistor R6, an operational amplifier U26B, a resistor R7, and a resistor R19, where a first end of the capacitor C7 is used as an input end of the second microphone communication circuit, a second end of the capacitor C7 is connected to an inverting input end of the operational amplifier U26B through the resistor R6, an in-phase input end of the operational amplifier U26B is connected to a 1.65V power supply, and an output end of the operational amplifier U26B is connected to an inverting input end of the operational amplifier U26B through the resistor R7, and an output end of the operational amplifier U26B is connected to an inverting input end of the operational amplifier U26A through the resistor R19.
In this embodiment, the alarm voice signal can be sent through the second microphone communication circuit when the first microphone communication circuit fails, so that the reliability of the civil air defense alarm intermediate controller is improved, when the second microphone communication circuit sends the alarm voice signal, the external switch is required to be pressed down, then the alarm signal is sent, and the signal is amplified by the op amp U26B and then added to the inverting input end of the op amp U26A, and is also output as the fifth audio signal.
As shown in fig. 4, the embodiment further includes a headset communication control circuit, where the headset communication control circuit includes a resistor R13, a switch tube Q2, a resistor R15, a resistor R11, a capacitor C21, a switch tube Q1, a resistor R21, and a resistor R32, where the control end of the switch tube Q2 is grounded through the capacitor C21, the first end of the switch tube Q2 is connected to the first end of the capacitor C20 through the resistor R13, the second end of the switch tube Q2 is connected to the control end of the switch tube Q2 through the resistor R15, the second end of the switch tube Q2 is connected to a 12V power supply through the resistor R11, the second end of the switch tube Q2 is connected to the control end of the switch tube Q1, the first end of the switch tube Q1 is connected to the first end of the resistor R32 through the resistor R21, and the second end of the resistor R32 is grounded, and the first end of the resistor R32 is connected to the first input end of the main control unit.
The first and second microphone communication circuits are local alarm signal inputs, and the main control unit cannot know whether an alarm signal needs to be sent out, so that the alarm signal cannot be normally sent to the multimedia terminal.
When the local request sends out an alarm signal, the external switch is pressed, at this time, the control terminal voltage of the switching tube Q2 is higher than the first terminal voltage of the switching tube Q2, the switching tube Q2 is conducted, the control terminal voltage of the switching tube Q1 is lower than the first terminal voltage of the switching tube Q1, the switching tube Q1 is also conducted, therefore, the first terminal of the resistor R32 is at a high level, the high level signal is sent to the main control unit, at this time, the local request sends out the alarm signal is indicated, and then the main control unit sends out an instruction to the multi-path gating circuit.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (8)
1. The multi-voice signal input type civil air defense alarm intermediate controller is characterized by comprising an alarm monitoring circuit, wherein the alarm monitoring circuit comprises a resistor R50, a resistor R49, a resistor R42, a resistor R213, an operational amplifier U26C, a resistor R41, an audio amplifier U14 and a monitoring loudspeaker,
the first end of the resistor R50 is used as the input end of a first audio signal, the first end of the resistor R49 is used as the input end of a second audio signal, the first end of the resistor R42 is used as the input end of a third audio signal, the first end of the resistor R213 is used as the input end of a fourth audio signal, the second end of the resistor R50, the second end of the resistor R49, the second end of the resistor R42 and the second end of the resistor R213 are all connected with the inverting input end of the operational amplifier U26C, the non-inverting input end of the operational amplifier U26C is connected with a 1.65V power supply, the output end of the operational amplifier U26C is connected with the inverting input end of the operational amplifier U26C through the resistor R41, the input end of the operational amplifier U26C is connected with the inverting input end of the audio amplifier U14, the first output end of the audio amplifier U14 is connected with the first end of the speaker, and the second output end of the audio amplifier U14 is connected with the second speaker.
2. The multi-voice signal input type civil air defense alarm intermediate controller according to claim 1, further comprising a main control unit, wherein the alarm monitoring circuit further comprises an electronic switch U2A, a resistor R73, a resistor R58 and a switch tube Q8, a first end of the resistor R73 is used for being connected with a first output end of the main control unit, a second end of the resistor R73 is connected with a control end of the switch tube Q8, a first end of the switch tube Q8 is connected with a 5V power supply through the resistor R58, a second end of the switch tube Q8 is grounded, a first end of the switch tube Q8 is connected with a control end of the electronic switch U2A, an input end of the electronic switch U2A is connected with an output end of the operational amplifier U26C, and an output end of the electronic switch U2A is connected with an inverting input end of the audio amplifier U14.
3. The multi-voice signal input type civil air defense alarm intermediate controller according to claim 2, wherein the alarm monitoring circuit further comprises a digital potentiometer U15, a resistor R36 and a resistor R251, a control input end of the digital potentiometer U15 is connected with a second output end of the main control unit, a selection input end of the digital potentiometer U15 is connected with a third output end of the main control unit, a high resistance end of the digital potentiometer U15 is connected with an output end of the electronic switch U2A through the resistor R36, an adjustment end of the digital potentiometer U15 is connected with an inverting input end of the audio amplifier U14 through the resistor R251, and a low resistance end of the digital potentiometer U15 is connected with a 1.65V power supply.
4. The multi-voice signal input type civil air defense warning intermediate controller according to claim 2, further comprising a multi-path gating circuit, wherein the multi-path gating circuit comprises an analog switch U5, a resistor R44, a resistor R51, a resistor R209, a resistor R217 and a capacitor C57, an enabling end of the analog switch U5, a first selecting end of the analog switch U5 and a second selecting end of the analog switch U5 are all connected with the main control unit, a first input end of a first channel of the analog switch U5 is used as an input end of a fifth audio signal, a second input end of the first channel of the analog switch U5 is connected with a first end of the resistor R250 through the resistor R44, a second input end of the first channel of the analog switch U5 is grounded through the resistor R51, a third input end of the first channel of the analog switch U5 is used as an input end of a second audio signal, a fourth input end of the first channel of the analog switch U5 is used as an input end of the first audio signal,
the output end of the first channel of the analog switch U5 is connected with the first end of the resistor R217 through the resistor R209, the second end of the resistor R217 is grounded, the first end of the resistor R217 is connected with the first end of the capacitor C57, and the second end of the capacitor C57 is used as the first output end of the multiplexing gating circuit.
5. The multi-voice signal input type civil air defense warning intermediate controller according to claim 4, wherein the multi-path gating circuit further comprises a capacitor C22, a resistor R31, a resistor R27, an operational amplifier U26A, a resistor R18, a resistor R34, a capacitor C25 and a resistor R223, a first end of the capacitor C22 is used as an input end of a fifth audio signal, a second end of the capacitor C22 is connected with an inverting input end of the operational amplifier U26A through the resistor R31, an non-inverting input end of the operational amplifier U26A is grounded through the resistor R34, an non-inverting input end of the operational amplifier U26A is connected with a 5V power supply through the resistor R18, an output end of the operational amplifier U26A is connected with an inverting input end of the operational amplifier U26A through the resistor R27, an output end of the operational amplifier U26A is connected with a first end of the resistor R223 through the capacitor C25, and a second end of the resistor R223 is connected with a first input end of the first channel of the analog switch U5.
6. The multi-voice signal input type civil air defense warning intermediate controller according to claim 5, further comprising a first microphone communication circuit, wherein the first microphone communication circuit comprises a capacitor C20 and a resistor R20, a first end of the capacitor C20 is used as an input end of the first microphone communication circuit, and a second end of the capacitor C20 is connected to an inverting input end of the op-amp U26A through the resistor R20.
7. The multi-voice signal input type civil air defense warning intermediate controller according to claim 5, further comprising a second microphone communication circuit, wherein the second microphone communication circuit comprises a capacitor C7, a resistor R6, an operational amplifier U26B, a resistor R7 and a resistor R19, a first end of the capacitor C7 is used as an input end of the second microphone communication circuit, a second end of the capacitor C7 is connected with an inverting input end of the operational amplifier U26B through the resistor R6, an non-inverting input end of the operational amplifier U26B is connected with a 1.65V power supply, an output end of the operational amplifier U26B is connected with an inverting input end of the operational amplifier U26B through the resistor R7, and an output end of the operational amplifier U26B is connected with an inverting input end of the operational amplifier U26A through the resistor R19.
8. The multi-voice signal input type civil air defense alarm intermediate controller according to claim 6, further comprising a microphone communication control circuit, wherein the microphone communication control circuit comprises a resistor R13, a switch tube Q2, a resistor R15, a resistor R11, a capacitor C21, a switch tube Q1, a resistor R21 and a resistor R32, the control end of the switch tube Q2 is grounded through the capacitor C21, the first end of the switch tube Q2 is connected with the first end of the capacitor C20 through the resistor R13, the second end of the switch tube Q2 is connected with the control end of the switch tube Q2 through the resistor R15, the second end of the switch tube Q2 is connected with a 12V power supply through the resistor R11, the second end of the switch tube Q2 is connected with the control end of the switch tube Q1, the first end of the switch tube Q1 is connected with the 12V power supply, the second end of the switch tube Q1 is connected with the first end of the resistor R32 through the resistor R21, the second end of the switch tube Q2 is connected with the first end of the resistor R32, and the first end of the switch tube Q32 is connected with the first end of the first input unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320981591.XU CN219811243U (en) | 2023-04-26 | 2023-04-26 | Multi-voice signal input type civil air defense alarm intermediate controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320981591.XU CN219811243U (en) | 2023-04-26 | 2023-04-26 | Multi-voice signal input type civil air defense alarm intermediate controller |
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