CN216957123U - Reminding device of session conference - Google Patents
Reminding device of session conference Download PDFInfo
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- CN216957123U CN216957123U CN202220689368.3U CN202220689368U CN216957123U CN 216957123 U CN216957123 U CN 216957123U CN 202220689368 U CN202220689368 U CN 202220689368U CN 216957123 U CN216957123 U CN 216957123U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The utility model discloses a reminding device of a session conference, which comprises a matching circuit, a detection circuit, a voice adjusting circuit and a reminding circuit, wherein the matching circuit is respectively connected with the detection circuit and the voice adjusting circuit; matching circuit inserts speech signal, carry out output respectively to detection circuitry after the impedance match, the speech regulation circuit exports the speech signal who adjusts after amplifying impedance match's speech signal, transmit respectively to audio frequency processing module, remind the circuit, detection circuitry control adjusts the amplification factor of speech regulation circuit to the speech signal that the impedance match, remind the circuit after the speech signal intensity that has adjusted is not up to standard, give light warning and remind, this application can be according to the size of the automatic regulation microphone amplification volume of the size of people's speech sound, it is too small to speak at the people's sound simultaneously, give corresponding warning, remind the people to need improve the sound of speaking.
Description
Technical Field
The utility model relates to the field of voice volume, in particular to a reminding device for a session conference.
Background
In conversation meeting, a microphone is used, especially the meeting space is large, or the number of people participating in the meeting is large, the microphone can be used to amplify the speaking sound, the listeners in the conference can clearly hear the speaking content, in practice, the person who speaks in the conference may involve multiple persons, the speaking sound of different persons is different, after the amplified volume of the microphone is set, the difference in the amount of sound spoken by different people results in the difference in the amount of sound emitted using a microphone with the amplification volume set, especially for speakers who speak less, the sound content can not be clearly received by the audience, the microphone of the prior art can not automatically adjust the amplification volume of the microphone according to the sound of the person speaking, meanwhile, when the speaking voice of the person is too small, corresponding reminding is lacked, and the person is reminded of needing to improve the speaking voice.
Disclosure of Invention
The utility model aims to solve the problems in the prior art, and provides a reminding device for a conversation conference, which can automatically adjust the amplified volume of a microphone according to the speaking sound of a person, and can give a corresponding reminding to remind the person of needing to improve the speaking sound when the speaking sound of the person is too small.
The utility model provides a reminding device of a session conference, which comprises a matching circuit, a detection circuit, a voice adjusting circuit and a reminding circuit, wherein the matching circuit is respectively connected with the detection circuit and the voice adjusting circuit; the voice detection circuit is connected with the voice signal, the voice signal which is subjected to impedance matching is output to be transmitted to the detection circuit and the voice adjusting circuit respectively after the impedance matching is carried out on the connected voice signal, the voice adjusting circuit amplifies the received voice signal which is subjected to impedance matching and outputs the adjusted voice signal, the adjusted voice signal is transmitted to the audio processing module and the reminding circuit respectively, the detection circuit detects the size of the received voice signal which is subjected to impedance matching, the amplification factor of the voice adjusting circuit on the voice signal which is subjected to impedance matching is controlled and adjusted according to the size of the detected signal, the reminding circuit receives the adjusted voice signal which is output by the voice adjusting circuit, and light warning reminding is given after the intensity of the adjusted voice signal does not reach the standard.
The reminding device for the session conference provided by the embodiment of the utility model has the following beneficial effects:
when a microphone is used for speaking, when the speaking sound of a speaker is large, the relay K1 in the detection of the detection circuit is not powered, the voice regulation circuit is controlled to carry out primary amplification on the received voice signal with matched impedance by using the triode Q5 and then output the voice signal to the audio processing module, namely, when the speaking sound of the speaker is small, the relay K1 in the detection circuit is powered, the voice regulation circuit is controlled to carry out secondary amplification on the received voice signal with matched impedance by using the composite tube consisting of the triode Q6 and the triode Q7 and then output the voice signal to the audio processing module, namely, when the speaking sound of the speaker is small, the listener can be clearly heard by using the secondary amplification of large multiple, the voice amplification volume of the microphone can be automatically regulated according to the speaking sound of the speaker without manual regulation, the voice prompt device is convenient to use, can reach the required speaking volume of an audience, is too small in speaking of a speaker, and lights the light emitting diode D4 to remind a person of improving the speaking voice after the adjusted voice signal strength does not reach the standard.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following drawings, which are included to provide a more thorough understanding of the technical features and the overall technical solutions of the present invention.
A reminding device for a session conference comprises a matching circuit, a detection circuit, a voice adjusting circuit and a reminding circuit, wherein the matching circuit is respectively connected with the detection circuit and the voice adjusting circuit; the voice detection circuit is connected with the voice signal, the voice signal which is subjected to impedance matching is output to be transmitted to the detection circuit and the voice adjusting circuit respectively after the impedance matching is carried out on the connected voice signal, the voice adjusting circuit amplifies the received voice signal which is subjected to impedance matching and outputs the adjusted voice signal, the adjusted voice signal is transmitted to the audio processing module and the reminding circuit respectively, the detection circuit detects the size of the received voice signal which is subjected to impedance matching, the amplification factor of the voice adjusting circuit on the voice signal which is subjected to impedance matching is controlled and adjusted according to the size of the detected signal, the reminding circuit receives the adjusted voice signal which is output by the voice adjusting circuit, and light warning reminding is given after the intensity of the adjusted voice signal does not reach the standard.
The matching circuit comprises a resistor R1, one end of a resistor R1 is connected with a voice signal, the other end of the resistor R1 is respectively connected with one end of a capacitor C1, one end of a variable resistor R3, the other end of the variable resistor R3 is respectively connected with an adjustable end of the variable resistor R3, one end of a resistor R4 is connected with the ground in parallel, the other end of the resistor C1 is respectively connected with one end of a resistor R2 and a base electrode of a triode Q1, the other end of the resistor R2 is connected with a collector of a triode Q1 and a power supply VCC, and an emitter of the triode Q1 is respectively connected with the other end of a resistor R4 and one end of the capacitor C2;
the working principle of the matching circuit is as follows: in the prior art, a microphone is used for speaking in a conference, the principle of the microphone is that voice of human speech is converted into an electric signal representing the voice after being input by the microphone, then the electric signal is amplified by an amplifying circuit, and the amplified electric signal is processed and analyzed by an audio processing module and then is sounded by a sounding device;
the voice signal enters the matching circuit of the application through the resistor R1, the size of the voice signal can be adjusted by adjusting the resistance value of the variable resistor R3, the impedance matcher is formed by the capacitor C1, the capacitor C2, the resistor R2, the resistor R4 and the triode Q1, and the voice signal after impedance conversion and matching is output and is subjected to impedance matching and then is respectively transmitted to the detection circuit and the voice adjusting circuit.
The detection circuit comprises a diode D1, the anode of the diode D1 is connected with the other end of a capacitor C2 in the matching circuit, the cathode of the diode D1 is respectively connected with one end of a resistor R7 and one end of a resistor R9, the other end of the resistor R7 is respectively connected with one end of a resistor R10, one end of a resistor R16, one end of a resistor R21, the cathode of a capacitor C3 and one end of a resistor R20 and is connected with the ground, the other end of the resistor R9 is respectively connected with the other end of a resistor R10 and the non-inverting input end of an operational amplifier AR1, the inverting input end of the operational amplifier AR1 is respectively connected with one end of a resistor R8 and one end of a resistor R12, the other end of the resistor R8 is respectively connected with one end of a variable resistor R5, the adjustable end of the variable resistor R5 and one end of a resistor R6, the other end of the resistor R6 is connected with the ground, the other end of the variable resistor R5 is respectively connected with one end of a relay K1, the cathode of the diode D7 and the power supply, the output end of the VCC 2 of the operational amplifier AR1 is respectively connected with the output 12 of the resistor R8282828282828282828282828228, One end of a resistor R15, the other end of the resistor R15 is connected with one end of a resistor R18 and the reverse-phase input end of an operational amplifier AR2 respectively, the non-phase input end of the operational amplifier AR2 is connected with the other end of a resistor R16, the other end of the resistor R18 is connected with one end of a resistor R19 and the output end of the operational amplifier AR2 respectively, the other end of the resistor R19 is connected with the anode of a diode D8, the cathode of a diode D8 is connected with the other end of a resistor R20, the anode of a capacitor C3 and the anode of a diode D2 respectively, the cathode of the diode D2 is connected with the base of a triode Q2, the emitter of the triode Q2 is connected with the other end of a resistor R21, and the collector of a triode Q2 is connected with the other end of a relay K1 and the anode of a diode D7 respectively;
the working principle of the detection circuit is as follows: the detection circuit receives the voice signal which is output by the matching circuit and is subjected to impedance matching, the voice signal is rectified by a diode D1, an operational amplifier AR1, a resistor R8, a resistor R9, a resistor R10 and a resistor R12 form a differential circuit, the rectified voice signal enters the non-inverting input end of the operational amplifier AR1 through the resistor R9, the inverting input end of the operational amplifier AR1 is connected with a reference signal, the resistance value of a variable resistor R5 is adjusted to adjust the size of the reference signal, when the voice of a person is small, the differential circuit outputs a low-level difference signal, the operational amplifier AR2, a resistor R18, a resistor R15 and a resistor R16 form an inverter, the low-level difference signal output by the differential circuit is inverted through the inverter, the inverter outputs a high-level difference signal, the high-level difference signal after a period of time lasts under the charge delay action of a capacitor C3, the triode Q2 is conducted, and the relay K1 is electrified, the time delay function of the capacitor C3 aims to improve the detection accuracy, the relay K1 is electrified, the on port of the double-throw switch K1-1 of the relay K1 in the voice adjusting circuit is controlled to change, namely, the port 3 and the port 2 of the double-throw switch K1-1 of the relay K1 are disconnected, the port 1 and the port 2 are connected, the normally closed contact K1-2 of the relay K1 is disconnected, and the normally open contact K1-3 of the relay K1 is closed;
when the speaking sound of a person is loud, the differential circuit outputs a high-level difference signal, after the high-level difference signal is inverted by the inverter, the inverter outputs a low-level difference signal, the triode Q2 cannot be conducted, the relay K1 cannot be electrified, the port for controlling the on of the double-throw switch K1-1 of the relay K1 in the voice adjusting circuit is not changed, namely the port 3 and the port 2 of the double-throw switch K1-1 of the relay K1 are kept on, the port 1 and the port 2 are kept off, the normally-closed contact K1-2 of the relay K1 is kept on, and the normally-open contact K1-3 of the relay K1 is kept off.
The voice adjusting circuit comprises a resistor R13, one end of a resistor R13 is connected with the other end of a capacitor C2 in a matching circuit, the other end of a resistor R13 is connected with one end of a capacitor C4, the other end of a capacitor C4 is respectively connected with one end of the resistor R30, one end of a resistor R31, a base of a triode Q5 and a base of a triode Q6, the other end of the resistor R30 is respectively connected with one end of a normally closed contact K1-2 of a relay K1 and one end of a normally open contact K1-3 of the relay K1 and is connected with a power VCC, the other end of the normally closed contact K1-2 of the relay K1 is connected with one end of a resistor R29, the other end of the normally open contact K1-3 of the relay K1 is connected with one end of a resistor R28, the other end of a resistor R31 is respectively connected with one end of a resistor R32, one end of a capacitor C5 and one end of a variable resistor R33, and the collector of a triode Q5 is respectively connected with the other end of a resistor R29, The audio processing circuit comprises a port 3 of a double-throw switch K1-1 of a relay K1, an emitter of a triode Q5 is respectively connected with the other end of a resistor R32, the other end of a capacitor C5 and an emitter of a triode Q7, the emitter of the triode Q6 is connected with a base electrode of a triode Q7, a collector of the triode Q6 is respectively connected with a collector of a triode Q7, the other end of a resistor R28 and a port 1 of a double-throw switch K1-1 of a relay K1, a port 2 of a double-throw switch K1-1 of the relay K1 is connected with one end of the capacitor C6, the other end of the capacitor C6 is connected with the other end of a variable resistor R33, and an adjustable end of the variable resistor R33 is connected with an audio processing module;
the working principle of the voice regulating circuit is as follows: the voice adjusting circuit receives the voice signal with matched impedance output by the matching circuit, the capacitor C4 is a coupling capacitor, when the speaking voice of a person is small, the relay K1 in the detection circuit is electrified, so that the port 1 and the port 2 of the double-throw switch K1-1 of the relay K1 are closed, the normally closed contact K1-2 of the relay K1 is opened, the normally open contact K1-3 of the relay K1 is closed, and after a composite tube formed by the triode Q6 and the triode Q7 carries out secondary amplification on a voice signal after impedance matching, the amplified speech signal is coupled by the capacitor C6 and output to the audio processing module, which is a prior art device, such as a microprocessor, as mentioned above, the audio processing module processes and analyzes the received voice signal amplified by the stage and then sounds through the sound generating device;
when the speaking voice of a person is loud, a relay K1 in the detection circuit is power-off, a normally closed contact K1-2 of a relay K1 is closed, a port 3 and a port 2 of a double-throw switch K1-1 of a relay K1 are closed, a voice signal which is received by the voice adjusting circuit and is subjected to impedance matching is subjected to primary amplification through a triode Q5, is coupled through a capacitor C6 and then is output, and is transmitted to an audio processing module, and is processed and analyzed through the audio processing module in the prior art, and then the voice is produced through a generating device;
the amplification factor of the second-stage amplification of the voice signal subjected to impedance matching by the composite tube consisting of the triode Q6 and the triode Q7 is larger than that of the first-stage amplification of the triode Q5, and the adjustable end of the variable resistor R33 in the voice adjusting circuit outputs the adjusted voice signal to the audio processing module and the reminding circuit respectively.
The reminding circuit comprises a diode D6, the anode of a diode D6 is connected with the adjustable end of a variable resistor R33 in the voice adjusting circuit, the cathode of the diode D6 is connected with one end of a resistor R24, the other end of the resistor R24 is connected with the cathode of a voltage-stabilizing tube D3, the anode of a voltage-stabilizing tube D3 is connected with the base of a triode Q3, the emitter of the triode Q3 is connected with the ground, the collector of the triode Q3 is respectively connected with one end of a resistor R26 and one end of a resistor R27, the other end of the resistor R26 is connected with the cathode of a voltage-stabilizing tube D5, the anode of the voltage-stabilizing tube D5 is connected with the base of a triode Q4, the emitter of the triode Q4 is connected with the ground, the collector of the triode Q4 is connected with one end of a resistor R25, the other end of the resistor R25 is connected with the cathode of a light-emitting diode D4, and the anode of the light-emitting diode D4 is connected with the other end of the resistor R27 and is connected with a power supply VCC;
the working principle of the reminding circuit is as follows: the reminding circuit receives the regulated voice signal output by the voice regulating circuit, the diode D6 carries out rectification, if the regulated voice signal strength reaches the standard, the voltage regulator tube D3 breaks down, the triode Q3 is conducted, the triode Q4 is not conducted, the light emitting diode D4 is not lightened, if the voice of a person speaking is too small, the regulated voice signal strength still does not reach the standard, the voltage regulator tube D3 cannot break down, the triode Q3 cannot be conducted, the triode Q4 is conducted, the light emitting diode D4 is lightened, the voice of the person speaking is prompted to be too small, and the voice of the person speaking needs to be improved;
the device of this application can be installed in the suitable position in the microphone structure, and the mounted position of emitting diode D4 handles the position that the people was convenient for observe.
In particular use, the utility model is illustrated in the accompanying drawings:
in a conference, the speaking sounds of different people are different in size, the speaking sounds of the people are converted into electric signals representing the sounds after being input by a microphone, then the electric signals are amplified by an amplifying circuit in the prior art, and then the amplified electric signals are processed and analyzed by an audio processing module and then sounded by a sounding device;
voice signals enter the matching circuit of the application through the resistor R1, the resistance value of the variable resistor R3 is adjusted to adjust the size of the voice signals, an impedance matcher is formed by the capacitor C1, the capacitor C2, the resistor R2, the resistor R4 and the triode Q1, and the voice signals after impedance conversion and matching are output and impedance matched and are respectively transmitted to the detection circuit and the voice adjusting circuit;
when the speaking voice of a speaker is loud and can be clearly heard by an audience through a microphone, a detection circuit receives a voice signal with matched impedance, a differential circuit outputs a high-level difference signal, the inverter outputs a low-level difference signal after the phase inversion of the difference signal is carried out, a triode Q2 is not conducted, a relay K1 cannot be electrified, further a normally closed contact K1-2 of a relay K1 in a voice adjusting circuit is controlled to be closed, a normally open contact K1-3 of a relay K1 is disconnected, a port 3 and a port 2 of a double-throw switch K1-1 of the relay K1 are closed, the voice adjusting circuit carries out primary amplification on the received voice signal with matched impedance by using a triode Q5, the voice signal is coupled and output to an audio processing module through a capacitor C6 after the primary amplification, and the voice signal is processed and analyzed by the audio processing module in the prior art and then vocalizes through a generating device;
when the speaking voice of the speaker is small and can not be clearly seen by the audience through the microphone, the differential circuit in the detection circuit outputs a low-level difference signal to the inverter, the inverter performs phase inversion to output a high-level difference signal, the high-level difference signal is delayed by charging the capacitor C3, the voltage on the capacitor C3 is increased by the low level lasting for a period of time, the triode Q2 is further conducted, the relay K1 is electrified to control the normally closed contact K1-2 of the relay K1 in the voice regulation circuit to be disconnected, the normally open contact K1-3 of the relay K1 is closed, the port 1 and the port 2 of the double-throw switch K1-1 of the relay K1 are connected, the voice regulation circuit performs secondary amplification on the received voice signal with impedance matching by using a composite tube composed of the triode Q6 and the triode Q7, the voice signal is coupled and output to the audio processing module through the capacitor C6 after the secondary amplification, after being processed and analyzed by an audio processing module in the prior art, the sound is produced by a generating device;
the delay effect of the capacitor C3 in the detection circuit lasts for a period of small speaking sound, so that the voltage of the capacitor C3 is increased, the triode Q2 is further conducted, the relay K1 is powered on, and the purpose is to improve the detection accuracy;
the amplification factor of the second-stage amplification of the voice signal subjected to impedance matching by the composite tube consisting of the triode Q6 and the triode Q7 is larger than that of the first-stage amplification of the triode Q5, and the adjustable end of the variable resistor R33 in the voice adjusting circuit outputs the adjusted voice signal to be transmitted to the audio processing module and the reminding circuit respectively;
the sizes of different speaking sounds of speakers are different, when the speaking sounds of the speakers are detected to be large, and the speakers can be clearly heard by people after the speaking sounds pass through the microphones, the voice adjusting circuit performs primary amplification on the received voice signals with matched impedance, the amplification factor is smaller than that of secondary amplification, namely, the speaking sounds of the speakers can be clearly heard by listeners only through the primary amplification of the small factor, and the speaking sounds of the speakers are small, the voice adjusting circuit performs secondary amplification on the received voice signals with matched impedance, the amplification factor of the secondary amplification is larger than that of the primary amplification, namely, the speaking sounds of the speakers are small, and the listeners can clearly hear by the secondary amplification of the large factor, namely, the sizes of the amplification volumes of the microphones can be automatically adjusted according to the sizes of the speaking sounds of the speakers, so that the requirements of the listeners are met;
the reminding circuit receives the adjusted voice signal output by the voice adjusting circuit, if the voice adjusting circuit adjusts the voice to be too small to meet the requirements of audiences, the voltage stabilizing tube D3 is not conducted, the triode Q3 is not conducted, the triode Q4 is conducted, the light emitting diode D4 is lightened, and the reminding person needs to increase the speaking volume;
the size of the voice signal output by the voice adjusting circuit can be adjusted by adjusting the resistance value of the variable resistor R33 in the voice adjusting circuit.
The beneficial effect that this application realized does:
1. when a microphone is used for speaking, when the speaking sound of a speaker is large, a relay K1 in the detection of the detection circuit is not powered, the voice regulation circuit is controlled to carry out primary amplification on the received voice signal with matched impedance by using a triode Q5 and then output the voice signal to the audio processing module, namely, the speaking sound of the speaker can be clearly heard by a listener through the primary amplification of small times;
when the speaking sound of the speaker is small, a relay K1 in the detection circuit is electrified, the voice regulation circuit is controlled to carry out secondary amplification on the received voice signal with matched impedance by using a composite tube consisting of a triode Q6 and a triode Q7 and then output the voice signal to the audio processing module, namely, the speaking sound of the speaker can be clearly heard by listeners only through the secondary amplification of a large multiple;
the volume amplifying method and the device can automatically adjust the volume amplifying of the microphone according to the volume of the speaking sound of a person, do not need manual regulation and control, are convenient to use, and can achieve the speaking volume required by an audience;
2. this application utilizes to remind the circuit to the voice signal of the regulation of pronunciation regulating circuit output, it is too little at speaker's speech, the voice signal intensity of regulation does not reach standard, stabilivolt D3 does not puncture, triode Q3 does not switch on, triode Q4 switches on, emitting diode D4 lights, remind the people to need improve the sound of speech, this application gives the warning too little at the sound of people's speech, remind the people to need improve the sound of speech.
The application provides a reminding device of conversation meeting can be according to the size that the automatic regulation microphone of the size of people's speech sound enlargies the volume, and the sound of speaking is too little at the people simultaneously, gives corresponding warning, reminds the people to need improve the sound of speaking.
Claims (5)
1. The reminding device for the session conference is characterized by comprising a matching circuit, a detection circuit, a voice adjusting circuit and a reminding circuit, wherein the matching circuit is respectively connected with the detection circuit and the voice adjusting circuit;
the voice detection circuit is connected with the voice signal, the voice signal which is subjected to impedance matching is output to be transmitted to the detection circuit and the voice adjusting circuit respectively after the impedance matching is carried out on the connected voice signal, the voice adjusting circuit amplifies the received voice signal which is subjected to impedance matching and outputs the adjusted voice signal, the adjusted voice signal is transmitted to the audio processing module and the reminding circuit respectively, the detection circuit detects the size of the received voice signal which is subjected to impedance matching, the amplification factor of the voice adjusting circuit on the voice signal which is subjected to impedance matching is controlled and adjusted according to the size of the detected signal, the reminding circuit receives the adjusted voice signal which is output by the voice adjusting circuit, and light warning reminding is given after the intensity of the adjusted voice signal does not reach the standard.
2. The device as claimed in claim 1, wherein the matching circuit includes a resistor R1, one end of the resistor R1 is connected to the voice signal, the other end of the resistor R1 is connected to one end of a capacitor C1 and one end of a variable resistor R3, the other end of the variable resistor R3 is connected to the adjustable end of the variable resistor R3 and one end of the resistor R4 in parallel, the other end of the resistor C1 is connected to one end of a resistor R2 and the base of a transistor Q1, the other end of the resistor R2 is connected to the collector of a transistor Q1 and the power VCC, and the emitter of the transistor Q1 is connected to the other end of the resistor R4 and one end of the capacitor C2.
3. The reminding device for the conversation conference as claimed in claim 1, wherein the detection circuit comprises a diode D1, the anode of the diode D1 is connected to the other end of a capacitor C2 in the matching circuit, the cathode of the diode D1 is connected to one end of a resistor R7 and one end of a resistor R9 respectively, the other end of the resistor R7 is connected to one end of a resistor R10, one end of a resistor R16, one end of a resistor R21, the cathode of a capacitor C3 and one end of a resistor R20 respectively and connected to ground, the other end of the resistor R9 is connected to the other end of a resistor R10 and the non-inverting input end of an operational amplifier AR1 respectively, the inverting input end of the operational amplifier AR1 is connected to one end of a resistor R8 and one end of a resistor R12 respectively, the other end of the resistor R8 is connected to one end of a variable resistor R5, the adjustable end of a variable resistor R5 and one end of a resistor R6 respectively, the other end of the resistor R6 and the other end of the variable resistor R5 is connected to ground, and the other end of the variable resistor R5 is connected to one end of a relay K1 respectively, The negative electrode of the diode D7 is connected with a power supply VCC, the output end of the operational amplifier AR1 is connected with the other end of the resistor R12 and one end of the resistor R15, the other end of the resistor R15 is connected with one end of the resistor R18 and the inverting input end of the operational amplifier AR2, the non-inverting input end of the operational amplifier AR2 is connected with the other end of the resistor R16, the other end of the resistor R18 is connected with one end of the resistor R19 and the output end of the operational amplifier AR2, the other end of the resistor R19 is connected with the positive electrode of the diode D8, the negative electrode of the diode D8 is connected with the other end of the resistor R20, the positive electrode of the capacitor C3 and the positive electrode of the diode D2, the negative electrode of the diode D2 is connected with the base of the triode Q2, the emitter of the triode Q2 is connected with the other end of the resistor R21, and the collector of the triode Q2 is connected with the other end of the relay K1 and the positive electrode of the diode D7.
4. The device as claimed in claim 1, wherein the voice adjusting circuit includes a resistor R13, one end of the resistor R13 is connected to the other end of a capacitor C2 in the matching circuit, the other end of the resistor R13 is connected to one end of a capacitor C4, the other end of the capacitor C4 is connected to one end of a resistor R30, one end of a resistor R31, the base of a transistor Q5, and the base of a transistor Q6, the other end of the resistor R30 is connected to one end of a normally closed contact K1-2 of a relay K1, one end of a normally open contact K1-3 of a relay K1 is connected to the power VCC, the other end of the normally closed contact K1-2 of the relay K1 is connected to one end of a resistor R29, the other end of a normally open contact K1-3 of the relay K1 is connected to one end of a resistor R28, the other end of a resistor R31 is connected to one end of a resistor R32, one end of a capacitor C5, one end of a variable resistor R33 is connected to the ground, the collector of a triode Q5 is respectively connected with the other end of a resistor R29 and the port 3 of a double-throw switch K1-1 of a relay K1, the emitter of a triode Q5 is respectively connected with the other end of a resistor R32, the other end of a capacitor C5 and the emitter of a triode Q7, the emitter of a triode Q6 is connected with the base of a triode Q7, the collector of a triode Q6 is respectively connected with the collector of a triode Q7, the other end of a resistor R28 and the port 1 of a double-throw switch K1-1 of the relay K1, the port 2 of the double-throw switch K1-1 of the relay K1 is connected with one end of a capacitor C6, the other end of a capacitor C6 is connected with the other end of a variable resistor R33, and the adjustable end of the variable resistor R33 is connected with an audio processing module.
5. The reminding device of a conversation conference as claimed in claim 1, wherein the reminding circuit comprises a diode D6, the anode of the diode D6 is connected with the adjustable end of a variable resistor R33 in the voice adjusting circuit, the cathode of the diode D6 is connected with one end of a resistor R24, the other end of the resistor R24 is connected with the cathode of a voltage regulator tube D3, the anode of the voltage regulator tube D3 is connected with the base of a triode Q3, the emitter of the triode Q3 is connected with ground, the collectors of the triode Q3 are respectively connected with one end of a resistor R26, one end of a resistor R27, the other end of the resistor R26 is connected with the cathode of a voltage-stabilizing tube D5, the anode of the voltage-stabilizing tube D5 is connected with the base of a triode Q4, the emitter of the triode Q4 is connected with the ground, the collector of the triode Q4 is connected with one end of a resistor R25, the other end of the resistor R25 is connected with the cathode of a light-emitting diode D4, and the anode of the light-emitting diode D4 is connected with the other end of a resistor R27 and is connected with a power supply VCC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220689368.3U CN216957123U (en) | 2022-03-28 | 2022-03-28 | Reminding device of session conference |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220689368.3U CN216957123U (en) | 2022-03-28 | 2022-03-28 | Reminding device of session conference |
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| CN216957123U true CN216957123U (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220689368.3U Active CN216957123U (en) | 2022-03-28 | 2022-03-28 | Reminding device of session conference |
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2022
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