CN208971786U - A kind of monitoring and early warning sound equipment - Google Patents
A kind of monitoring and early warning sound equipment Download PDFInfo
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- CN208971786U CN208971786U CN201822086444.8U CN201822086444U CN208971786U CN 208971786 U CN208971786 U CN 208971786U CN 201822086444 U CN201822086444 U CN 201822086444U CN 208971786 U CN208971786 U CN 208971786U
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Abstract
The utility model discloses a kind of monitoring and early warning sound equipment, including PoE power supply；Feeder ear is electrically connected the digital power amplifier circuit that PoE power supply forms power supply line；The phonetic incepting and amplifying circuit that signal input part receives audio signal and signal output end is connect with the audio signal input end of digital power amplifier circuit；The voice output circuit that signal input part is connect with the audio signal output end of digital power amplifier circuit；The detection circuit and on/off circuit of the power supply line of digital power amplifier circuit are accessed after series connection；The input terminal connection audio signal of detection circuit has simultaneously detected whether audio signal input, connects if then controlling on/off circuit and then connects power supply line；If otherwise control on/off circuit disconnects and then disconnect power supply line, monitoring and early warning sound equipment is directly entered standby mode at this time, plays energy-efficient effect, intelligent quick；Digital power amplifier circuit uses digital integrated circuit chip, and high-efficient, occupied space is few, and sound clarity is bright, more superior than traditional analog amplifier circuit.
Description
Technical field
The utility model belongs to technology field of audio, and in particular to a kind of monitoring and early warning sound equipment.
Background technique
Stereo set probably includes power amplifier, peripheral equipment (including compressor, effect device, balanced device, driver etc.), loudspeaking
Device (speaker, loudspeaker), sound console, sound source (such as microphone, musical instrument, VCD, DVD) show equipment.Traditional monitoring and early warning sound
It rings and uses analog circuit or mixed type audio-amplifying circuit, the transient response and frequency characteristic of internal circuit are all poor, traditional cloth
Line due to wire material, transmit remote factor it is too long can loss of signal, often will appear hoarse, intermodulation distortion, sound quality it is bad,
Cooling requirements are high, weight is big, circuit structure is complicated, maintenance difficulty is high, loudspeaker damping system is big, control force is not strong, at high cost, point is used
Space is big, there is the realities such as some Code in Hazardous Special Locations installation inconveniences.
Utility model content
In order to solve the above problems existing in the present technology, the utility model aim is to provide a kind of monitoring and early warning sound
It rings.
The technology employed by the present utility model is
A kind of monitoring and early warning sound equipment, comprising:
PoE power supply；
Feeder ear is electrically connected the digital power amplifier circuit that PoE power supply forms power supply line；
Signal input part receives audio signal and signal output end is connect with the audio signal input end of digital power amplifier circuit
Phonetic incepting and amplifying circuit；
The voice output circuit that signal input part is connect with the audio signal output end of digital power amplifier circuit；
The detection circuit and on/off circuit of the power supply line of digital power amplifier circuit are accessed after series connection；
The phonetic incepting and amplifying circuit are used to receive audio signal and are transmitted to the sound of digital power amplifier circuit after handling
Frequency signal input part by audio signal after the audio signal output end output processing of digital power amplifier circuit and is output by voice electricity
Road output；
The input terminal connection audio signal of detection circuit has simultaneously detected whether audio signal input, if it is logical then to control power supply
Deenergizing is connected and then connects power supply line；If otherwise control on/off circuit disconnects and then disconnects power supply line.
The input terminal connection audio signal of the detection circuit of the utility model has simultaneously detected whether audio signal input, if
Then control the power supply line that on/off circuit is connected and then connects digital power amplifier；If otherwise control on/off circuit is disconnected
Drive and disconnect the power supply line of digital power amplifier circuit into, monitoring and early warning sound equipment is directly entered standby mode at this time, plays energy-efficient
Effect, and automatically switch to switch on and off state, intelligent quick.
The digital power amplifier circuit of the utility model uses digital integrated circuit chip, and high-efficient, occupied space is few, and sound quality is clear
It is clear bright, it is more superior than traditional analog amplifier circuit.
The power supply of the utility model is powered using PoE, and according to the actual situation, it is direct that POE can provide 12V 24V voltage
It is used to digital power amplifier circuit, avoids traditional analog amplifier circuit from needing to be inserted into alternating current and be converted by power-switching circuit
Corresponding voltage could use.
Preferably, the detection circuit includes that sequentially connected first common emitter amplifying circuit and the second common collector are put
Big circuit, the detection input connection PoE power supply and audio signal of the first common emitter amplifying circuit, the second common collector amplification electricity
The detection output on road connects on/off circuit；
On/off circuit includes sequentially connected relay and power rectifier, one end connection detection circuit of relay
Detection output and the other end connection power rectifier input terminal, power rectifier output end connection digital power amplifier electricity
Road.
Detection circuit has detected whether that audio signal inputs and amplifies processing to audio signal, if then controlling power supply
On-off circuit is connected and then connects the power supply line of digital power amplifier；If otherwise control on/off circuit is disconnected and then is disconnected
The power supply line of digital power amplifier circuit, monitoring and early warning sound equipment are directly entered standby mode.
By the first common emitter amplifying circuit and the second common collector amplifying circuit, keep signal detection accurate, even small
The signal of electric current can also be detected accurately；It is rapid that state auto-switching can be made to switch on and off by relay, play intelligence
Switching and energy-efficient effect.
Preferably, the first common emitter amplifying circuit include emitter be grounded the first triode Q1, the two or three
Pole pipe Q2 and the first peripheral circuit, the first peripheral circuit include be serially connected rear one end connection PoE power supply and audio signal and
The other end connect the first triode Q1 base stage resistance R21, capacitor C41 and resistance R23 and one end be connected to capacitor C41 and
Between resistance R23 and the other end ground connection resistance R22；First peripheral circuit further include it is parallel with one another after be connected to the first triode
Resistance R24 and capacitor C42 between Q1 base stage and collector are connected to the first triode Q1 collector and the second triode Q2 base
Capacitor C43 between pole and it is parallel with one another after be connected to resistance R26 and electricity between the second triode Q2 base stage and collector
Hold C44；First peripheral circuit further includes that one end is connect with relay and the other end is separately connected the first triode Q1 collector
With the resistance R25 and resistance R27 of the second triode Q2 collector；
Second common collector amplifying circuit includes that collector is all connected with the third transistor Q3 of relay, the four or three pole
Pipe Q4 and the second peripheral circuit, the second peripheral circuit include being connected to the second triode Q2 collector and third transistor Q3 base
Capacitor C45 between pole, the resistance R29 and capacitor C46 being connect respectively with the emitter of third transistor Q3, and it is connected to
Resistance R30 between three triode Q3 emitters and the 4th triode Q4 base stage；Second peripheral circuit further includes one end and relay
The resistance R28 of device connection and other end connection third transistor Q3 collector.
Preferably, the phonetic incepting and amplifying circuit include phonetic incepting circuit and voice amplification circuit, voice is connect
It receives circuit and carries out the amplification of first time signal for receiving audio signal and being transmitted to voice amplification circuit, be then transmit to digital function
Electric discharge road carries out second of signal amplification.
Preferably, the phonetic incepting and amplifying circuit include first via phonetic incepting and amplifying circuit and the second road language
Sound receives and amplifying circuit, and first via phonetic incepting and amplifying circuit include that first via phonetic incepting circuit and first via voice are put
Big circuit, the second road phonetic incepting and amplifying circuit include the second road phonetic incepting circuit and the second road voice amplification circuit；
First via phonetic incepting circuit for receive first via audio signal and be transmitted to first via voice amplification circuit into
The amplification of row first time signal is then transmit to digital power amplifier circuit and carries out second of signal amplification；
Second road phonetic incepting circuit for receive the second tunnel audio signal and be transmitted to the second road voice amplification circuit into
The amplification of row first time signal is then transmit to digital power amplifier circuit and carries out second of signal amplification.
Preferably, the first via voice amplification circuit and the second road voice amplification circuit use amplifier.
Preferably, the digital power amplifier circuit includes digital integrated circuit chip U6 and its peripheral circuit, digital integration
The negative audio input end of the right channel of circuit chip U6 and the negative audio input end of L channel are grounded, and the positive audio of right channel is defeated
The positive audio input end for entering end and L channel passes through swept resistance respectively and connect with phonetic incepting and amplifying circuit, digital integration electricity
The D class H bridge positive output of the D class H bridge positive output end of the right channel of road chip U6, the D class H bridge negative output terminal of right channel, L channel
The D class H bridge negative output terminal and voice output circuit connection at end and L channel.Digital power amplifier circuit uses digital integrated electronic circuit core
Piece, high-efficient, occupied space is few, and sound clarity is bright, more superior than traditional analog amplifier circuit.
Preferably, the voice output circuit includes first via voice output circuit and the second tunnel voice output circuit,
First via voice output circuit and the second tunnel voice output circuit include loudspeaker.
Preferably, the monitoring and early warning sound equipment further includes IP Camera, audio letter is directly acquired by IP Camera
Number and be transmitted to phonetic incepting and amplifying circuit and detection circuit.
Preferably, the monitoring and early warning sound equipment further includes AD/DA signal conversion circuit, single-chip microcontroller, communication chip, network
Filter and network interface；
The single-chip microcontroller is connect by AD/DA signal conversion circuit with phonetic incepting and amplifying circuit and detection circuit, single
Piece machine is connect with communication chip, and communication chip is connect by network filter with network interface.
Communication chip, network filter and network interface form telecommunication circuit, are used for transmission audio signal and long-range control
Signal is simultaneously sent to single-chip microcontroller, single-chip microcontroller reception, processing and output audio signal to AD/DA signal conversion circuit, AD/DA signal
Audio signal progress digital-to-analogue conversion is then forwarded to phonetic incepting and amplifying circuit and detection circuit by conversion circuit.
The utility model has the following beneficial effects:
1, the input terminal of the detection circuit of the utility model connects audio signal and has detected whether audio signal input, if
It is the power supply line for controlling on/off circuit and connecting and then connecting digital power amplifier；If otherwise controlling on/off circuit
The power supply line of digital power amplifier circuit is disconnected and then disconnects, monitoring and early warning sound equipment is directly entered standby mode at this time, plays energy conservation
Effect, and automatically switch switch on and off state, intelligent quick.
2, the digital power amplifier circuit of the utility model uses digital integrated circuit chip, and high-efficient, occupied space is few, sound quality
It is clear bright, it is more superior than traditional analog amplifier circuit.
3, the power supply of the utility model is powered using PoE, and according to the actual situation, it is straight that POE can provide 12V 24V voltage
It connects and is used to digital power amplifier circuit, traditional analog amplifier circuit is avoided to need to be inserted into alternating current and convert by power-switching circuit
It could be used at corresponding voltage.
Detailed description of the invention
Fig. 1 is the system block diagram of the utility model-embodiment 1.
Fig. 2 is the detection circuit of the utility model-embodiment 3 and the circuit diagram of on/off circuit.
Fig. 3 is the utility model-embodiment 4-6 phonetic incepting and amplifying circuit, digital power amplifier circuit and voice output
The circuit diagram of circuit.
Fig. 4 is the system block diagram of the utility model-embodiment 7.
Fig. 5 is the system block diagram of the utility model-embodiment 8.
Fig. 6 is the circuit diagram of the single-chip microcontroller of the utility model-embodiment 8.
Fig. 7 is the circuit diagram of the communication chip of the utility model-embodiment 8.
Fig. 8 is the circuit diagram of the network filter of the utility model-embodiment 8.
Fig. 9 is the circuit diagram of the network interface of the utility model-embodiment 8.
Figure 10 is the circuit diagram of the AD/DA signal conversion circuit of the utility model-embodiment 8.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further elaborated the utility model.
Embodiment 1:
As shown in Figure 1, a kind of monitoring and early warning sound equipment of the present embodiment, including shell, power supply, detection electricity in shell
Road, on/off circuit, phonetic incepting and amplifying circuit, digital power amplifier circuit and voice output circuit.
Wherein, the feeder ear of power supply and digital power amplifier circuit is electrically connected to form power supply line, phonetic incepting and amplifying circuit
Signal input part receive audio signal and signal output end and connect with the audio signal input end of digital power amplifier circuit, voice connects
It receives and amplifying circuit is used to receive audio signal and is transmitted to the audio signal input end of digital power amplifier circuit, digital function after handling
The signal input part of the audio signal output end connection voice output circuit on electric discharge road, detection circuit are connected with on/off circuit
The power supply line for accessing digital power amplifier circuit afterwards, for controlling the on-off of power supply line, the input terminal of detection circuit connects audio
Signal has simultaneously detected whether audio signal input, connects if then controlling on/off circuit and then connects power supply line；If not
On/off circuit is then controlled to disconnect and then disconnect power supply line.
In this implementation, digital power amplifier circuit uses digital integrated circuit chip, and power supply is powered using PoE.
The monitoring and early warning sound equipment of the present embodiment play it is following the utility model has the advantages that
1, the input terminal of detection circuit connects audio signal and has detected whether audio signal input, if then controlling power supply
On-off circuit is connected and then connects the power supply line of digital power amplifier；If otherwise control on/off circuit is disconnected and then is disconnected
The power supply line of digital power amplifier circuit, monitoring and early warning sound equipment is directly entered standby mode at this time, plays energy-efficient effect, and certainly
It is dynamic to be switched on and off-state, intelligent quick.
2, digital power amplifier circuit uses digital integrated circuit chip, and high-efficient, occupied space is few, and sound clarity is bright, than
Traditional analog amplifier circuit is superior.
3, power supply is powered using PoE, and according to the actual situation, POE can provide 12V 24V voltage directly to digital power amplifier
Circuit uses, and avoids traditional analog amplifier circuit from needing to be inserted into alternating current and is converted into corresponding voltage by power-switching circuit
It could use.
In the present embodiment, shell is made of ABS plastic, and ABS plastic is that a kind of raw material is easy to get, comprehensive performance is good, valence
Cheap, widely used " tough and tensile, matter the is firmly, rigidly " material of lattice.
In the present embodiment, PoE provides 12V voltage and uses to digital power amplifier circuit.
Embodiment 2:
Detection electricity is further described in a kind of monitoring and early warning sound equipment of the present embodiment, on the basis of embodiment 1, the present embodiment
The detailed construction on road and on/off circuit.
Detection circuit includes sequentially connected first common emitter amplifying circuit and the second common collector amplifying circuit, and first is total
The detection input connection power supply and audio signal of emitter-base bandgap grading amplifying circuit, the detection output of the second common collector amplifying circuit connect
Connect on/off circuit.
On/off circuit includes sequentially connected relay and power rectifier, one end connection detection circuit of relay
Detection output and the other end connection power rectifier input terminal, power rectifier output end connection digital power amplifier electricity
Road.
Detection circuit has detected whether that audio signal inputs and amplifies processing to audio signal, if then controlling power supply
On-off circuit is connected and then connects the power supply line of digital power amplifier；If otherwise control on/off circuit is disconnected and then is disconnected
The power supply line of digital power amplifier circuit, monitoring and early warning sound equipment are directly entered standby mode.
The monitoring and early warning sound equipment of the present embodiment play it is following the utility model has the advantages that
By the first common emitter amplifying circuit and the second common collector amplifying circuit, keep signal detection accurate, even small
The signal of electric current can also be detected accurately；It is rapid that state auto-switching can be made to switch on and off by relay, play intelligence
Switching and energy-efficient effect.
Embodiment 3:
As shown in Fig. 2, a kind of monitoring and early warning sound equipment of the present embodiment, on the basis of embodiment 2, the present embodiment is further
Illustrate the circuit principle structure of detection circuit.
First common emitter amplifying circuit includes the first triode Q1, the second triode Q2 and first that emitter is grounded
Peripheral circuit, the first peripheral circuit include being serially connected rear one end connection power supply to connect the one or three pole with audio signal and the other end
Resistance R21, capacitor C41 and the resistance R23 of pipe Q1 base stage and one end are connected between capacitor C41 and resistance R23 and the other end
The resistance R22 of ground connection, the first peripheral circuit further include it is parallel with one another after be connected between the first triode Q1 base stage and collector
Resistance R24 and capacitor C42, the capacitor C43 being connected between the first triode Q1 collector and the second triode Q2 base stage, with
And it is parallel with one another after be connected to resistance R26 and capacitor C44 between the second triode Q2 base stage and collector, the first peripheral circuit
It further include that one end is connect with relay and the other end is separately connected the first triode Q1 collector and the second triode Q2 current collection
The resistance R25 and resistance R27 of pole.
Second common collector amplifying circuit includes that collector is all connected with the third transistor Q3 of relay, the 4th triode Q4
And second peripheral circuit, the second peripheral circuit include be connected to the second triode Q2 collector and third transistor Q3 base stage it
Between capacitor C45, the resistance R29 and capacitor C46 being connect respectively with the emitter of third transistor Q3, and be connected to the three or three
Resistance R30 between pole pipe Q3 emitter and the 4th triode Q4 base stage, the second peripheral circuit further include that one end and relay connect
Connect and the other end connection third transistor Q3 collector resistance R28.
In the present embodiment, detection circuit further includes the interface P1 for connecting power supply and audio signal, and interface P1 is logical
Sequentially connected resistance R21, capacitor C41 and resistance R23 is crossed to connect with the first triode Q1 base stage.
In the present embodiment, on/off circuit further includes the interface P2 for connecting digital power amplifier, interface P2
It is connect by power rectifier with relay.
Embodiment 4:
As shown in figure 3, a kind of monitoring and early warning sound equipment of the present embodiment, on the basis of embodiment 1, the present embodiment is further
Illustrate the circuit principle structure of phonetic incepting and amplifying circuit.
Phonetic incepting and amplifying circuit include first via phonetic incepting and amplifying circuit and the second road phonetic incepting and amplification
Circuit, first via phonetic incepting and amplifying circuit include first via phonetic incepting circuit and first via voice amplification circuit, and second
Road phonetic incepting and amplifying circuit include the second road phonetic incepting circuit and the second road voice amplification circuit；First via phonetic incepting
Circuit carries out the amplification of first time signal for receiving first via audio signal and being transmitted to first via voice amplification circuit, then passes
It transports to digital power amplifier circuit and carries out second of signal amplification, the second road phonetic incepting circuit is for receiving the second tunnel audio signal simultaneously
It is transmitted to the second road voice amplification circuit and carries out the amplification of first time signal, be then transmit to digital power amplifier circuit and carry out second of letter
Number amplification.
First via phonetic incepting circuit includes being serially connected the capacitor C97 and electricity connecting afterwards with first via voice amplification circuit
R65 is hindered, and is serially connected the capacitor C96 connecting afterwards with first via voice amplification circuit and resistance R64, the second road phonetic incepting
Circuit include be serially connected the capacitor C95 and resistance R12 connecting afterwards with the second road voice amplification circuit, and after being serially connected with
The capacitor C21 and resistance R5 of second road voice amplification circuit connection.
First via voice amplification circuit includes the first amplifier of inverting input terminal Yu first via phonetic incepting circuit connection
U3A, the resistance R8 and capacitor C27 being connected to after in parallel between the inverting input terminal and output end of first amplifier U3A, and series connection
Capacitor C1 and resistance R33 between the output end and digital power amplifier circuit of the first amplifier U3A.
Second road voice amplification circuit includes the second amplifier of inverting input terminal Yu the second road phonetic incepting circuit connection
U3B, the resistance R68 and capacitor C98 being connected to after in parallel between the inverting input terminal and output end of second amplifier U3B, and string
The capacitor C3 and resistance R72 being associated between the output end and digital power amplifier circuit of the second amplifier U3B.
Embodiment 5:
As shown in figure 3, a kind of monitoring and early warning sound equipment of the present embodiment, on the basis of embodiment 4, the present embodiment is further
Illustrate the circuit principle structure of digital power amplifier circuit.
Digital power amplifier circuit includes digital integrated circuit chip U6 and its peripheral circuit, the model of chip U6
TPA3110D2.Digital power amplifier circuit uses digital integrated circuit chip, and high-efficient, occupied space is few, and sound clarity is bright, than
Traditional analog amplifier circuit is superior.
The RINP of TPA3110D2 is the positive audio input end of right channel, and RINN is the negative audio input end of right channel, LINP
For the positive audio input end of L channel, LINN is the negative audio input end of L channel, and in the present embodiment, the negative audio of right channel is defeated
The negative audio input end for entering end and L channel is grounded, and the positive audio input end of right channel passes through the first swept resistance RS2 and the
The signal output end of phonetic incepting and amplifying circuit connects all the way, and the positive audio input end of L channel passes through the second swept resistance
RS1 is connect with the second road phonetic incepting and amplifying circuit.
The ROUTP of TPA3110D2 is the D class H bridge positive output end of right channel, and ROUTN is the D class H bridge negative output of right channel
End, LOUTP are the D class H bridge positive output end of L channel, and LOUTN is the D class H bridge negative output terminal of L channel.
The D class H bridge positive output end of right channel, the D class H bridge negative output terminal of right channel, L channel D class H bridge positive output end
With the D class H bridge negative output terminal and voice output circuit connection of L channel.
Embodiment 6:
As shown in figure 3, a kind of monitoring and early warning sound equipment of the present embodiment, on the basis of embodiment 5, the present embodiment is further
Illustrate the circuit principle structure of voice output circuit.
Voice output circuit includes first via voice output circuit and the second tunnel voice output circuit, first via voice output
Circuit includes capacitor C8, inductance L1, capacitor C22, inductance L5 and the first loudspeaker, and the one end inductance L1 connects the first loudspeaker and another
One end connects the D class H bridge positive output end of the right channel of digital integrated circuit chip U6, and the one end capacitor C8 connects the another of inductance L1
The end bootstrapping I/O of the right channel of end and other end connection digital integrated circuit chip U6 and positive high side FET, the connection of the one end inductance L5
The D class H bridge negative output terminal of the right channel of first loudspeaker and other end connection digital integrated circuit chip U6, the one end capacitor C22
The other end of connection inductance L5 and the end bootstrapping I/O and the negative high side of the right channel of other end connection digital integrated circuit chip U6
FET。
Second tunnel voice output circuit includes capacitor C29, inductance L9, capacitor C19, inductance L7 and the second loudspeaker, inductance
The one end L9 connects the D class H bridge positive output end of the second loudspeaker and the L channel of other end connection digital integrated circuit chip U6, electricity
Hold the end bootstrapping I/O of the other end of the one end C29 connection inductance L9 and the L channel of other end connection digital integrated circuit chip U6
And positive high side FET, the one end inductance L7 connect the D of the second loudspeaker and the L channel of other end connection digital integrated circuit chip U6
Class H bridge negative output terminal, the one end capacitor C19 connect a left side for the other end of inductance L7 and other end connection digital integrated circuit chip U6
The end bootstrapping I/O of sound channel and negative high side FET.
First loudspeaker and the second loudspeaker are all made of magnet steel loudspeaker.
Embodiment 7:
As shown in figure 4, a kind of monitoring and early warning sound equipment of the present embodiment, on the basis of embodiment 1, the monitoring of the present embodiment
Early warning sound equipment further comprises IP Camera.
Audio signal is directly acquired by IP Camera, which is directly accessed phonetic incepting and amplifying circuit and inspection
Slowdown monitoring circuit.
Embodiment 8:
As shown in figure 5, a kind of monitoring and early warning sound equipment of the present embodiment, on the basis of embodiment 1, the monitoring of the present embodiment
Early warning sound equipment further comprises AD/DA signal conversion circuit, single-chip microcontroller, communication chip, network filter and network interface.
Single-chip microcontroller is connect by AD/DA signal conversion circuit with phonetic incepting and amplifying circuit and detection circuit, single-chip microcontroller
It is connect with communication chip, communication chip is connect by network filter with network interface.
Communication chip, network filter and network interface form telecommunication circuit, are used for transmission audio signal and long-range control
Signal is simultaneously sent to single-chip microcontroller, single-chip microcontroller reception, processing and output audio signal to AD/DA signal conversion circuit, AD/DA signal
Audio signal progress digital-to-analogue conversion is then forwarded to phonetic incepting and amplifying circuit and detection circuit by conversion circuit.
The present embodiment also discloses single-chip microcontroller, communication chip, network filter, network interface and AD/DA signal conversion electricity
The circuit diagram on road.As illustrated in figures 6-10.
A kind of monitoring and early warning sound equipment of the present embodiment is network sound.A kind of embodiment are as follows: in use, first
Audio signal is received by single-chip microcontroller, remote control signal is then received by telecommunication circuit and control single chip computer exports audio letter
Number, subsequent audio signal pass sequentially through AD/DA signal conversion circuit carry out digital-to-analogue conversion, by phonetic incepting and amplifying circuit and
Digital power amplifier circuit amplifies and volume adjustment, finally by voice output circuit output, realizes the long-range control of broadcasting content
System.
The utility model is not limited to above-mentioned optional embodiment, anyone can obtain under the enlightenment of the utility model
Other various forms of products, however, making any variation in its shape or structure, all the utility model rights that falls into are wanted
The technical solution in confining spectrum is sought, is all fallen within the protection scope of the utility model.
Claims (10)
1. a kind of monitoring and early warning sound equipment, it is characterised in that: include:
PoE power supply；
Feeder ear is electrically connected the digital power amplifier circuit that PoE power supply forms power supply line；
The language that signal input part receives audio signal and signal output end is connect with the audio signal input end of digital power amplifier circuit
Sound receives and amplifying circuit；
The voice output circuit that signal input part is connect with the audio signal output end of digital power amplifier circuit；
The detection circuit and on/off circuit of the power supply line of digital power amplifier circuit are accessed after series connection；
The phonetic incepting and amplifying circuit are used to receive audio signal and are transmitted to the audio letter of digital power amplifier circuit after handling
Number input terminal, by audio signal after the audio signal output end output processing of digital power amplifier circuit and to be output by voice circuit defeated
Out；
The input terminal connection audio signal of detection circuit has simultaneously detected whether audio signal input, if then controlling on/off electricity
Road is connected and then connects power supply line；If otherwise control on/off circuit disconnects and then disconnects power supply line.
2. a kind of monitoring and early warning sound equipment according to claim 1, it is characterised in that: the detection circuit includes being sequentially connected with
The first common emitter amplifying circuit and the second common collector amplifying circuit, the first common emitter amplifying circuit detection input connection
The detection output of PoE power supply and audio signal, the second common collector amplifying circuit connects on/off circuit；
On/off circuit includes sequentially connected relay and power rectifier, the inspection of one end connection detection circuit of relay
The input terminal of output end and other end connection power rectifier is surveyed, the output end of power rectifier connects digital power amplifier.
3. a kind of monitoring and early warning sound equipment according to claim 2, it is characterised in that: the first common emitter amplifying circuit packet
Including the first triode Q1, the second triode Q2 and the first peripheral circuit, the first peripheral circuit that emitter is grounded includes phase
Mutually one end connects resistance R21, capacitor that PoE power supply connects the first triode Q1 base stage with audio signal and the other end after series connection
C41 and resistance R23 and one end are connected between capacitor C41 and resistance R23 and the resistance R22 of other end ground connection；First periphery
Circuit further include it is parallel with one another after be connected to resistance R24 and capacitor C42 between the first triode Q1 base stage and collector, connection
Capacitor C43 between the first triode Q1 collector and the second triode Q2 base stage and it is parallel with one another after be connected to second
Resistance R26 and capacitor C44 between triode Q2 base stage and collector；First peripheral circuit further includes that one end connects with relay
It connects and the other end is separately connected the resistance R25 and resistance R27 of the first triode Q1 collector and the second triode Q2 collector；
Second common collector amplifying circuit includes that collector is all connected with the third transistor Q3 of relay, the 4th triode Q4
And second peripheral circuit, the second peripheral circuit include be connected to the second triode Q2 collector and third transistor Q3 base stage it
Between capacitor C45, the resistance R29 and capacitor C46 being connect respectively with the emitter of third transistor Q3, and be connected to the three or three
Resistance R30 between pole pipe Q3 emitter and the 4th triode Q4 base stage；Second peripheral circuit further includes that one end and relay connect
Connect and the other end connection third transistor Q3 collector resistance R28.
4. a kind of monitoring and early warning sound equipment according to claim 1, it is characterised in that: the phonetic incepting and amplifying circuit packet
Phonetic incepting circuit and voice amplification circuit are included, phonetic incepting circuit is for receiving audio signal and being transmitted to voice amplification circuit
The amplification of first time signal is carried out, digital power amplifier circuit is then transmit to and carries out second of signal amplification.
5. a kind of monitoring and early warning sound equipment according to claim 4, it is characterised in that: the phonetic incepting and amplifying circuit packet
Include first via phonetic incepting and amplifying circuit and the second road phonetic incepting and amplifying circuit, first via phonetic incepting and amplifying circuit
Including first via phonetic incepting circuit and first via voice amplification circuit, the second road phonetic incepting and amplifying circuit include the second tunnel
Phonetic incepting circuit and the second road voice amplification circuit；
First via phonetic incepting circuit carries out for receiving first via audio signal and being transmitted to first via voice amplification circuit
Signal amplification, is then transmit to digital power amplifier circuit and carries out second of signal amplification；
Second road phonetic incepting circuit carries out for receiving the second tunnel audio signal and being transmitted to the second road voice amplification circuit
Signal amplification, is then transmit to digital power amplifier circuit and carries out second of signal amplification.
6. a kind of monitoring and early warning sound equipment according to claim 5, it is characterised in that: the first via voice amplification circuit and
Second road voice amplification circuit uses amplifier.
7. a kind of monitoring and early warning sound equipment according to claim 1, it is characterised in that: the digital power amplifier circuit includes number
IC chip U6 and its peripheral circuit, the negative audio input end of the right channel of digital integrated circuit chip U6 and L channel
Negative audio input end is grounded, and the positive audio input end of right channel and the positive audio input end of L channel pass through swept resistance respectively
It is connect with phonetic incepting and amplifying circuit, the D of the D class H bridge positive output end of the right channel of digital integrated circuit chip U6, right channel
The D class H bridge negative output terminal and voice output circuit of class H bridge negative output terminal, the D class H bridge positive output end of L channel and L channel connect
It connects.
8. a kind of monitoring and early warning sound equipment according to claim 6, it is characterised in that: the voice output circuit includes first
Road voice output circuit and the second tunnel voice output circuit, first via voice output circuit and the second tunnel voice output circuit wrap
Include loudspeaker.
9. a kind of monitoring and early warning sound equipment according to claim 1, it is characterised in that: the monitoring and early warning sound equipment further includes net
Network camera is directly acquired audio signal by IP Camera and is transmitted to phonetic incepting and amplifying circuit and detection circuit.
10. a kind of monitoring and early warning sound equipment according to claim 1, it is characterised in that: the monitoring and early warning sound equipment further includes
AD/DA signal conversion circuit, single-chip microcontroller, communication chip, network filter and network interface；
The single-chip microcontroller is connect by AD/DA signal conversion circuit with phonetic incepting and amplifying circuit and detection circuit, single-chip microcontroller
It is connect with communication chip, communication chip is connect by network filter with network interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822086444.8U CN208971786U (en) | 2018-12-12 | 2018-12-12 | A kind of monitoring and early warning sound equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822086444.8U CN208971786U (en) | 2018-12-12 | 2018-12-12 | A kind of monitoring and early warning sound equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208971786U true CN208971786U (en) | 2019-06-11 |
Family
ID=66766344
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822086444.8U Expired - Fee Related CN208971786U (en) | 2018-12-12 | 2018-12-12 | A kind of monitoring and early warning sound equipment |
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| Country | Link |
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| CN (1) | CN208971786U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117215982A (en) * | 2023-09-06 | 2023-12-12 | 北京科加触控技术有限公司 | MIPI signal transmission distance extension module suitable for optical touch equipment |
-
2018
- 2018-12-12 CN CN201822086444.8U patent/CN208971786U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117215982A (en) * | 2023-09-06 | 2023-12-12 | 北京科加触控技术有限公司 | MIPI signal transmission distance extension module suitable for optical touch equipment |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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