CN106131752B - Distributed voice adjusting device and method thereof - Google Patents
Distributed voice adjusting device and method thereof Download PDFInfo
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- H—ELECTRICITY
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
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Abstract
A distributed voice adjusting device is disclosed, which can automatically adjust the size of an audio signal input into a power amplifier, ensure the output power of the power amplifier to be stable, and ensure the decibel number of a loudspeaker pushed by the power amplifier to be unchanged. It includes: the system comprises a voice controller module, a plurality of sound amplifying telephone modules and a voice communication terminal; the voice controller module includes: the device comprises a singlechip, an audio signal sending circuit and an audio signal receiving circuit; each public address telephone module comprises: the device comprises a singlechip, an audio signal sending circuit and an audio signal receiving circuit; the audio signal transmitting circuit includes: a sound pressure conversion circuit of the microphone and an amplifying, filtering and isolating circuit of an audio voltage signal; the audio signal receiving circuit includes: the device comprises an isolation, filtering and amplification circuit of an audio signal from an audio bus and a positive peak detection circuit of the audio signal; the voice communication terminal includes: and the terminal voltage acquisition circuit is configured to acquire the peak values of the power supply voltage and the audio voltage of the terminal. There are also methods.
Description
Technical Field
The invention belongs to the technical field of electronic circuits, and particularly relates to a distributed voice adjusting device and method, which are mainly used for a voice communication centralized control system of a coal mine underground adhesive tape machine.
Background
In a centralized control system of the underground belt conveyor of a coal mine, voice communication is an important function. When the underground belt conveyor is in an emergency or underground equipment is maintained, voice communication is needed to communicate information, and effective transmission of the information is completed. When the underground outburst occurs, the centralized control system of the belt conveyor sends out an alarm prompt tone to prompt workers along the belt, so that accidents are avoided and fault information is prompted.
The distance along the line of the underground belt conveyor is long (up to 3km), and the number of modules hung along the line of the belt conveyor is large (more than 30 modules possibly), so that the defects of large interference, large audio attenuation, uneven audio bus ground, large audio signal load and the like are easily generated on an audio bus.
In a traditional voice communication centralized control system of the underground belt conveyor, sound can be attenuated and weakened in a long-distance and multi-load transmission process.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and a distributed voice adjusting device is provided, which can automatically adjust the size of an audio signal input into a power amplifier, ensure the stability of the output power of the power amplifier and ensure the unchanged decibel number of the sound of a loudspeaker pushed by the power amplifier.
The technical solution of the invention is as follows: this kind of distributed voice adjustment device, it includes:
the system comprises a voice controller module, a plurality of sound amplifying telephone modules and a voice communication terminal;
the voice controller module includes: the device comprises a singlechip, an audio signal sending circuit and an audio signal receiving circuit;
each public address telephone module comprises: the device comprises a singlechip, an audio signal sending circuit and an audio signal receiving circuit; the audio signal transmitting circuit includes: a sound pressure conversion circuit of the microphone and an amplifying, filtering and isolating circuit of an audio voltage signal; the audio signal receiving circuit includes: the device comprises an isolation, filtering and amplification circuit of an audio signal from an audio bus and a positive peak detection circuit of the audio signal; the voice communication terminal includes: a terminal voltage acquisition circuit configured to acquire peak values of a power supply voltage and an audio voltage of a terminal;
when any one of the amplified telephone modules is used as a sender for communication, the amplified telephone module sends an analog audio signal to an audio communication bus through a sound pressure conversion circuit of a microphone; the other public address telephone modules on the audio communication bus are used as a receiver to receive the analog audio signals on the bus, the receiver public address telephone module isolates and filters the analog audio signals on the bus through the isolation, filtering and amplification circuits of the audio signals from the audio bus, forward peak detection is carried out through the forward peak detection circuit of the audio signals, the forward peak is sent to the single chip microcomputer, the single chip microcomputer obtains the distance between the receiver public address telephone module and the transmitter public address telephone module according to the forward peak of the analog audio signals, the amplification factor of the isolation, filtering and amplification circuits of the audio signals from the audio bus is determined, and the amplification factor is written into the isolation, filtering and amplification circuits of the audio signals from the audio bus.
The invention can automatically adjust the size of the audio signal input into the power amplifier by using a distributed voice automatic adjustment technology, ensures the output power of the power amplifier to be stable, and ensures that the decibel number of the sound of the loudspeaker pushed by the power amplifier is not changed.
There is also provided a method of using such a distributed speech adaptation device, the method comprising the steps of:
(1) any one of the amplified telephone modules is used as a transmitter for communication, and the amplified telephone module transmits an analog audio signal to an audio communication bus through a sound pressure conversion circuit of a microphone;
(2) the other public address telephone modules on the audio communication bus are used as a receiver to receive the analog audio signal on the bus, the receiver public address telephone module isolates and filters the analog audio signal on the bus through an isolation, filtering and amplification circuit of the audio signal from the audio bus, and carries out forward peak detection through a forward peak detection circuit of the audio signal, and sends the forward peak to the single chip microcomputer;
(3) the singlechip acquires the distance between the receiver amplified telephone module and the transmitter amplified telephone module according to the forward peak value of the analog audio signal, determines the amplification factor of the isolation, filtering and amplification circuit of the audio signal from the audio bus, and writes the amplification factor into the isolation, filtering and amplification circuit of the audio signal from the audio bus.
Drawings
Fig. 1 shows a schematic structural diagram of a distributed speech adaptation apparatus according to the present invention.
Detailed Description
As shown in fig. 1, the distributed voice adjusting apparatus includes:
the system comprises a voice controller module, a plurality of sound amplifying telephone modules and a voice communication terminal;
the voice controller module includes: the device comprises a singlechip, an audio signal sending circuit and an audio signal receiving circuit;
each public address telephone module comprises: the device comprises a singlechip, an audio signal sending circuit and an audio signal receiving circuit; the audio signal transmitting circuit includes: a sound pressure conversion circuit of the microphone and an amplifying, filtering and isolating circuit of an audio voltage signal; the audio signal receiving circuit includes: the device comprises an isolation, filtering and amplification circuit of an audio signal from an audio bus and a positive peak detection circuit of the audio signal; the voice communication terminal includes: a terminal voltage acquisition circuit configured to acquire peak values of a power supply voltage and an audio voltage of a terminal;
when any one of the amplified telephone modules is used as a sender for communication, the amplified telephone module sends an analog audio signal to an audio communication bus through a sound pressure conversion circuit of a microphone; the other public address telephone modules on the audio communication bus are used as a receiver to receive the analog audio signals on the bus, the receiver public address telephone module isolates and filters the analog audio signals on the bus through the isolation, filtering and amplification circuits of the audio signals from the audio bus, forward peak detection is carried out through the forward peak detection circuit of the audio signals, the forward peak is sent to the single chip microcomputer, the single chip microcomputer obtains the distance between the receiver public address telephone module and the transmitter public address telephone module according to the forward peak of the analog audio signals, the amplification factor of the isolation, filtering and amplification circuits of the audio signals from the audio bus is determined, and the amplification factor is written into the isolation, filtering and amplification circuits of the audio signals from the audio bus.
The invention can automatically adjust the size of the audio signal input into the power amplifier by using a distributed voice automatic adjustment technology, ensures the output power of the power amplifier to be stable, and ensures that the decibel number of the sound of the loudspeaker pushed by the power amplifier is not changed.
In addition, the voice controller module further comprises: an alarm voice signal transmitting circuit; the alarm voice signal sending circuit comprises an alarm signal generating circuit and an alarm signal amplifying circuit; when the voice controller module is used as a sender for communication, the voice controller module sends an alarm signal to the audio communication bus through the alarm signal generating circuit; the other amplified telephone modules on the audio communication bus are used as the receiver to receive the alarm signal on the bus, the receiver amplified telephone module isolates and filters the alarm signal on the bus through the isolation, filtering and amplification circuit of the audio signal from the audio bus, and carries out forward peak detection through the forward peak detection circuit of the audio signal, sends the forward peak to the single chip microcomputer, the single chip microcomputer obtains the distance between the receiver amplified telephone module and the transmitter amplified telephone module according to the forward peak of the alarm signal, determines the amplification factor of the isolation, filtering and amplification circuit of the alarm signal from the audio bus, and writes the amplification factor into the isolation, filtering and amplification circuit of the audio signal from the audio bus.
In addition, the audio signal receiving circuit further includes: a power amplification circuit for the audio signal from the audio bus.
In addition, the voice controller module further comprises: a timing circuit and an amplitude limiting control circuit; and in the period of time that the voice amplification telephone module of the transmitter sends the audio signal ts, the amplification factor is default A times, and when the amplification factor is greater than the maximum amplification factor Gainmax, the processing is carried out according to Gainmax, and when the amplification factor is less than the minimum amplification factor Gainmin, the processing is carried out according to Gainmin.
In addition, the voice controller module further comprises: and a timer for determining that the magnification is kept unchanged when the adjusting time of the magnification is less than tm.
There is also provided a method of using such a distributed speech adaptation device, the method comprising the steps of:
(1) any one of the amplified telephone modules is used as a transmitter for communication, and the amplified telephone module transmits an analog audio signal to an audio communication bus through a sound pressure conversion circuit of a microphone;
(2) the other public address telephone modules on the audio communication bus are used as a receiver to receive the analog audio signal on the bus, the receiver public address telephone module isolates and filters the analog audio signal on the bus through an isolation, filtering and amplification circuit of the audio signal from the audio bus, and carries out forward peak detection through a forward peak detection circuit of the audio signal, and sends the forward peak to the single chip microcomputer;
(3) the singlechip acquires the distance between the receiver amplified telephone module and the transmitter amplified telephone module according to the forward peak value of the analog audio signal, determines the amplification factor of the isolation, filtering and amplification circuit of the audio signal from the audio bus, and writes the amplification factor into the isolation, filtering and amplification circuit of the audio signal from the audio bus.
In addition, the method also comprises an alarm signal step, which comprises the following sub-steps:
(a) the voice controller module is used as a sender for communication, and sends an alarm signal to the audio communication bus through the alarm signal generating circuit;
(b) the receiver amplified telephone module isolates and filters the alarm signal on the bus through an isolation, filtering and amplification circuit of the audio signal from the audio bus, and performs forward peak detection through a forward peak detection circuit of the audio signal, and sends the forward peak to the singlechip;
(c) the singlechip acquires the distance between the receiver amplified telephone module and the transmitter amplified telephone module according to the forward peak value of the alarm signal, determines the amplification factor of the isolation, filtering and amplification circuit of the alarm signal from the audio bus, and writes the amplification factor into the isolation, filtering and amplification circuit of the audio signal from the audio bus.
In the step (3), in the period of time when the voice amplification telephone module of the sender sends the audio signal ts, the amplification factor is default a times, and when the amplification factor is greater than the maximum amplification factor Gainmax, the processing is performed according to Gainmax, and when the amplification factor is less than the minimum amplification factor Gainmin, the processing is performed according to Gainmin.
In addition, in the step (3), when the adjustment time of the magnification is less than tm, the magnification is kept unchanged. The overshoot of the sound signal is avoided, the smoothness of sound output is guaranteed, and the sound is restored to be closer to human voice.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiment according to the technical spirit of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (8)
1. A distributed voice regulation apparatus, characterized in that: it includes:
the system comprises a voice controller module, a plurality of sound amplifying telephone modules and a voice communication terminal;
the voice controller module includes: the device comprises a singlechip, an audio signal sending circuit and an audio signal receiving circuit;
each public address telephone module comprises: the device comprises a singlechip, an audio signal sending circuit and an audio signal receiving circuit;
the audio signal transmitting circuit includes: a sound pressure conversion circuit of the microphone and an amplifying, filtering and isolating circuit of an audio voltage signal;
the audio signal receiving circuit includes: the device comprises an isolation, filtering and amplification circuit of an audio signal from an audio bus, a positive peak detection circuit of the audio signal and a power amplification circuit of the audio signal from the audio bus;
the voice communication terminal includes: a terminal voltage acquisition circuit configured to acquire peak values of a power supply voltage and an audio voltage of a terminal;
when any one of the amplified telephone modules is used as a sender for communication, the amplified telephone module sends an analog audio signal to an audio communication bus through a sound pressure conversion circuit of a microphone; other public address telephone modules on the audio communication bus are used as a called party to receive the analog audio signal on the bus, the called party public address telephone module isolates and filters the analog audio signal on the bus through an isolation, filtering and amplification circuit of the audio signal from the audio bus, and forward peak detection is carried out through a forward peak detection circuit of the audio signal;
sending the forward peak value to a single chip microcomputer, obtaining the distance between a receiver amplified telephone module and a transmitter amplified telephone module by the single chip microcomputer according to the forward peak value of the analog audio signal, determining the amplification factor of an isolation, filtering and amplification circuit of the audio signal from an audio bus, and writing the amplification factor into the isolation, filtering and amplification circuit of the audio signal from the audio bus;
by using the distributed voice automatic adjustment technology, the size of the audio signal input into the power amplifier is automatically adjusted, the output power of the power amplifier is ensured to be stable, and the decibel number of the sound of the loudspeaker pushed by the power amplifier is unchanged.
2. The distributed speech adaptation unit of claim 1, wherein: the voice controller module further comprises: an alarm voice signal transmitting circuit; the alarm voice signal sending circuit comprises an alarm signal generating circuit and an alarm signal amplifying circuit; when the voice controller module is used as a sender for communication, the voice controller module sends an alarm signal to the audio communication bus through the alarm signal generating circuit; the receiver side amplified telephone module isolates and filters the alarm signal on the bus through the isolation, filtering and amplifying circuit of the audio signal from the audio bus, and carries out forward peak detection through the forward peak detection circuit of the audio signal, and sends the forward peak to the single chip microcomputer, and the single chip microcomputer obtains the distance between the receiver side amplified telephone module and the transmitter side amplified telephone module according to the forward peak of the alarm signal, determines the amplification factor of the isolation, filtering and amplifying circuit of the alarm signal from the audio bus, and writes the amplification factor into the isolation, filtering and amplifying circuit of the audio signal from the audio bus.
3. The distributed speech adaptation unit of claim 1, wherein: the voice controller module further comprises: a timing circuit and an amplitude limiting control circuit; and in the period of time that the voice amplification telephone module of the transmitter sends the audio signal ts, the amplification factor is default A times, and when the amplification factor is greater than the maximum amplification factor Gainmax, the processing is carried out according to Gainmax, and when the amplification factor is less than the minimum amplification factor Gainmin, the processing is carried out according to Gainmin.
4. The distributed speech adaptation unit of claim 3, wherein: the voice controller module further comprises: and a timer for determining that the magnification is kept unchanged when the adjusting time of the magnification is less than tm.
5. A method of using the distributed speech adaptation device of claim 1, wherein: the method comprises the following steps:
(1) any one of the amplified telephone modules is used as a transmitter for communication, and the amplified telephone module transmits an analog audio signal to an audio communication bus through a sound pressure conversion circuit of a microphone;
(2) simulation of other amplified telephone modules on audio communication bus as receiver receiving bus
The receiver public address telephone module isolates and filters the analog audio signal on the bus through an isolation, filtering and amplification circuit of the audio signal from the audio bus, and carries out forward peak detection through a forward peak detection circuit of the audio signal, and sends the forward peak to the singlechip;
(3) the singlechip acquires the distance between the receiver amplified telephone module and the transmitter amplified telephone module according to the forward peak value of the analog audio signal, determines the amplification factor of the isolation, filtering and amplification circuit of the audio signal from the audio bus, and writes the amplification factor into the isolation, filtering and amplification circuit of the audio signal from the audio bus.
6. The method of claim 5, wherein: the method also comprises an alarm signal step, which comprises the following sub-steps:
(a) the voice controller module is used as a sender for communication, and sends an alarm signal to the audio communication bus through the alarm signal generating circuit;
(b) the public address telephone module on the audio communication bus is used as the alarm on the receiving bus of the receiver
Signal, isolation of receiver amplified telephone module by audio signal from audio bus
The separation, filtering and amplification circuit isolates and filters the alarm signal on the bus, and carries out forward peak detection through a forward peak detection circuit of the audio signal, and sends the forward peak to the singlechip;
(c) the singlechip acquires the distance between the receiver amplified telephone module and the transmitter amplified telephone module according to the forward peak value of the alarm signal, determines the amplification factor of the isolation, filtering and amplification circuit of the alarm signal from the audio bus, and writes the amplification factor into the isolation, filtering and amplification circuit of the audio signal from the audio bus.
7. The method of claim 6, wherein: in the step (3), in the period of time when the voice amplification telephone module of the transmitter sends the audio signal ts, the amplification factor is default A times, and when the amplification factor is greater than the maximum amplification factor Gainmax, the processing is performed according to Gainmax, and when the amplification factor is less than the minimum amplification factor Gainmin, the processing is performed according to Gainmin.
8. The method of claim 7, wherein: in the step (3), when the adjusting time of the two times of magnification is less than tm, the magnification is kept unchanged.
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| CN201298258Y (en) * | 2008-11-24 | 2009-08-26 | 常州海新科技有限公司 | Mining intrinsic safety type voice warning device |
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