CN215526906U - Sound check alarm detector - Google Patents

Abstract

The utility model relates to a sound rechecking alarm detector, which comprises a CPU module, a BNPU module, at least one microphone connected with the BNPU module, an audio conversion module connected with the BNPU module, an alarm output module, a network module used for connecting a network and a power supply module used for supplying power to components; the BNPU module, the audio conversion module and the alarm output module are respectively and electrically connected with the CPU module; the BNPU module internally comprises an AGC circuit; the sound collected by the microphone is processed, amplified, denoised and identified by key words through a BNPU module, and an identification result signal is output, the CPU module receives the output identification signal and outputs the output identification signal to external alarm equipment through an alarm output module, meanwhile, digital audio for identification is synchronously output through 12S, is converted into a PCM voice signal through the CPU module and is transmitted back to a background server through a network module; the utility model can be matched with a camera to carry out synchronous sound acquisition of pictures, and can also identify and send an identification result signal through the keyword.

Description

Sound check alarm detector

Technical Field

The utility model belongs to the technical field of museum security and particularly relates to a sound rechecking alarm detector.

Background

In the exhibition hall, audio acquisition equipment can be installed in places such as galleries which are relatively quiet and have people moving, a sound pick-up is generally used for audio acquisition, meanwhile, analog signals are converted into digital audio by means of a network camera, and the digital audio is matched with videos to be transmitted into a system to acquire sound on site. The common sound pickup can only collect audio, has single function and can not realize the alarm function through voice recognition.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a sound rechecking alarm detector which can analyze set key words and give an alarm in time while collecting field sound.

The technical scheme of the utility model is as follows:

the sound rechecking alarm detector comprises a CPU module, a BNPU module, at least one microphone connected with the BNPU module, an audio conversion module connected with the BNPU module, an alarm output module and a power supply module for supplying power to components; the BNPU module, the audio conversion module and the alarm output module are respectively and electrically connected with the CPU module; the BNPU module internally comprises an AGC circuit;

the sound collected by the microphone is processed and amplified by the AGC circuit, then converted into a digital signal by the BNPU module for noise reduction and keyword identification, and an identification result signal is output, the CPU module receives the identification result signal and outputs the identification result signal to external alarm equipment by the alarm output module, meanwhile, digital audio for identification is synchronously output by the I2S, and an I2S audio signal synchronously output by the BNPU module is converted into a PCM voice signal by the CPU module and is transmitted back to the background server by the network module.

Further, the sound rechecking alarm detector also comprises a network module for connecting a network, wherein the network module comprises a transceiver module connected with the CPU module, a network transformer connected with the transceiver module and a network port J5 connected with the network transformer; the I2S audio signal synchronously output by the BNPU module is converted into a PCM voice signal by the CPU module and is transmitted back to the background server by the network module.

Furthermore, the BNPU module is electrically connected with a memory, a debugging serial port connector J4 and two microphone connecting seats, and the microphone is connected to the BNPU module through the microphone connecting seats.

Further, the alarm output module is an optical coupling isolation output module; the power supply module comprises a power supply interface J8 for external power access, a voltage output end 3V3 and a voltage output end 1V 2.

Furthermore, a lifting module is connected between the CPU module and the audio conversion module, the lifting circuit lifts the reference level output by the audio conversion module, the lifting module is connected with a simulated audio output test seat J2, and the audio conversion module converts the audio signal into an I2S audio signal, and then the audio signal is output through the simulated audio output test seat J2 after being amplified by the lifting module.

Furthermore, the CPU module is further connected with a debugging interface module, and the debugging interface module includes a debugging socket J3 connected with the CPU module.

The device further comprises a base and a shield, wherein the base is used for being mounted on the mounting surface, the shield is detachably connected with the base, a circuit board is arranged in the shield, and the CPU module, the BNPU module, the microphone, the audio conversion module, the alarm output module, the network module and the power supply module are all arranged on the circuit board; the shield is provided with a sound inlet hole.

Furthermore, guard shield threaded connection or pothook are connected the front of base, the inboard of guard shield still is provided with the locking piece, be provided with the screw thread blind hole in the locking piece, be provided with on the base with the fixed orifices that the screw thread blind hole corresponds, the guard shield is fixed through the mounting that sets up in screw thread blind hole and fixed orifices.

Furthermore, the inner wall of guard shield is provided with 2 at least supporting shoes, the circuit board passes through the bolt fastening on the supporting shoe.

Furthermore, the circuit board is arranged on one side of the supporting block facing the base, so that the circuit board can be conveniently mounted and dismounted.

Furthermore, the microphone is arranged on the back face of the circuit board and is closer to the sound inlet hole.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model can be matched with a camera to carry out synchronous sound acquisition of pictures, and can also identify and send an identification result signal through the keyword, wherein the identification result signal is used as an alarm signal; the alarm signal is linked locally and simultaneously transmits the alarm state to the background server through the network, meanwhile, the voice collected by the microphone is directly transmitted back to the background server through the network for rechecking after format conversion, and the background server checks the on-site alarm state and the returned rechecked voice, so that the alarm state is ensured to be consistent with the rechecked voice frequency, and the false alarm is prevented.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention.

Fig. 2 is a schematic circuit diagram of the CPU module, the alarm output module, and the debug interface module according to the embodiment of the present invention.

FIG. 3 is a schematic circuit diagram of a BNPU module according to an embodiment of the present invention.

Fig. 4 is a schematic circuit diagram of an audio conversion module according to an embodiment of the present invention.

FIG. 5 is a schematic circuit diagram of a lift module according to an embodiment of the present invention.

Fig. 6 is a schematic circuit diagram of a power supply module according to an embodiment of the present invention.

Fig. 7 is a schematic view of an inverted base and shield according to an embodiment of the utility model.

FIG. 8 is a schematic front view of a lock block of an embodiment of the present invention.

Fig. 9 is a schematic view of the mating of the base and the shield in an upright position according to an embodiment of the utility model.

Fig. 10 is a perspective view of a base and a shield according to an embodiment of the present invention.

In the figure, a base 1, a wall mounting hole 2, a connecting part 3, a circuit board 4, microphones 5 and 6, a shield 7, a supporting block 8, a sound inlet hole 9, a locking block 10 and a threaded blind hole 11 are arranged.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 6, the sound review alarm detector includes a CPU module, a BNPU module, at least one microphone 5 connected to the BNPU module, an audio conversion module connected to the BNPU module, an alarm output module, a network module for connecting to a network, and a power supply module for supplying power to components; the BNPU module, the audio conversion module and the alarm output module are respectively and electrically connected with the CPU module; the BNPU module internally comprises an AGC circuit;

the sound collected by the microphone 5 is processed and amplified by an AGC circuit and then sent to a BNPU module to be converted into a digital signal for noise reduction and keyword identification, and an identification result signal is output, the CPU module receives the identification result signal and outputs the identification result signal to external alarm equipment through an alarm output module, meanwhile, digital audio for identification is synchronously output through I2S, and an I2S audio signal synchronously output through the BNPU module is converted into a PCM (pulse code modulation) voice signal through the CPU module and is transmitted back to a background server through a network module; the equipment has a network interface, is convenient to install and work independently, and does not need to be matched with special audio coding equipment; the recognition result signal is used as an alarm signal;

the alarm signal output is in two modes, one mode is that the alarm signal is transmitted to a background server through a network module and a network cable to inform an external alarm device of the alarm state, the other mode is that a relay directly outputs the alarm state to drive the external alarm device such as an alarm lamp and an alarm loudspeaker, and the two modes are synchronously carried out; the background server also carries out keyword recognition on the received voice signal and checks the recognition result with the alarm state, if the voice recognition result of the background server is consistent with the alarm state, the situation that the alarm is really needed is indicated; since the identification accuracy of the local BNPU is not 100%, false alarm is prevented by background rechecking; moreover, the analysis of the digital audio is synchronous with the actual output, so that the problem of delay of converting the acquired analog signal into a digital signal for analysis again does not exist, and the timeliness can be ensured;

the audio conversion module adopts CS4344 elements inside, the CPU module adopts AT32F407 series high-performance microcontroller inside, the BNPU module adopts BNPU chip U3 inside, the BNPU chip U3 integrates automatic gain control circuit, namely AGC circuit inside, and BNPU can only analyze digital audio and can not encode audio, so that the output is performed by means of a special digital audio interface I2S, but I2S can not be transmitted through the network, so that the conversion is performed by AT32F 407. The BNPU module directly performs AGC processing and amplification on the sound acquired on site through the double microphones 5 and then converts the sound into a digital signal for operation processing, integrates noise reduction and integrates the functions of fuzzy speech recognition, can analyze set key words while acquiring the sound on site, and the BNPU chip U3 locally performs acquisition, calculation and decision of speech data, does not depend on a network, has small time delay, and can still realize the triggering control of the local external alarm equipment by speech triggering even under the condition of network disconnection; the BNPU chip of the embodiment can adopt a CI1103 voice chip, supports far-field remote sound pickup, can reach 5 m to 10 m, can meet the high-level use requirement of a museum, supports a dual-microphone 5 and a high-performance beam forming algorithm, supports up to 100 local command words, has low working power consumption, can be provided with keywords such as "save", "catch fire", "110", "coming person", "rescue" and "fire", and can accurately identify and correspondingly send out an alarm signal if a person talks or shouts "coming person rescue", "person catching fire ahead" in a sound collection range as long as the language contains related words.

Further, the network module comprises a transceiver module connected with the CPU module, a network transformer connected with the transceiver module, and a network port J5 connected with the network transformer; the inside of the transceiver module can adopt a DM9162EP Ethernet transceiver chip, the network transformer can adopt an H1102 network port transformer, and the network port J5 adopts a 4-pin network interface, so that the cost is saved; the network module is a mature technology and is not described in detail.

Further, as shown in fig. 3, the BNPU module is electrically connected to a memory, a debugging serial connector J4, and two microphone 5 connectors, and the microphone 5 is connected to the BNPU module through the microphone 5 connectors; the two microphones 5 form an array through a wave beam so as to effectively reduce the influence of noise in the environment and facilitate the noise reduction of field sound; the memory adopts a 25Q64 memory chip.

Further, as shown in fig. 2, the alarm output module is an optical coupling isolation output module, the CPU module is further connected with a debugging interface module, and the debugging interface module includes a debugging seat J3 connected with the CPU module; as shown in FIG. 6, the power supply module comprises an ME3116 voltage stabilizer, an LM1117-3V3/SOP223 chip, an LM1117-1V2/SOP223 chip and a power interface J8 for external power access, wherein the LM1117-3V3/SOP223 chip outputs 3V3 voltage, and the LM1117-1V2/SOP223 chip outputs 1V2 voltage. The AT32F407 series high-performance microcontroller, the debug socket J3, the Ethernet transceiver chip, the BNPU chip and the CS4344 amplifying circuit are connected with a 3V3 voltage end, and the BNPU chip is also connected with a 1V2 voltage end.

Further, as shown in fig. 5, a lifting module is connected between the CPU module and the audio conversion module, and the lifting circuit lifts the reference level output by the audio conversion module, because the audio output by the audio conversion module is positive and negative with the level of 0 as the reference, the CPU chip cannot recognize the negative voltage and lift the level reference to 1.6V, so that the CPU can recognize the complete waveform after internal processing; the lifting module comprises three LMV358 amplifiers, wherein the output end of one LMV358 amplifier is connected to the pin 21 of the AT32F407 series high-performance microcontroller, the output end of the other LMV358 amplifier is connected with an analog audio output test socket J2, and the output end of the other LMV358 amplifier can be amplified by the lifting module and then output by the analog audio output test socket J2 after being converted into an I2S audio signal by the audio conversion module.

Further, as shown in fig. 7 and 8, the sound rechecking alarm detector further includes a base 1 for being mounted on a mounting surface and a shield 7 detachably connected to the base 1, the base 1 is provided with a plurality of wall mounting holes 2, a circuit board 4 is arranged in the shield 7, and the CPU module, the BNPU module, the microphone 5, the audio conversion module, the alarm output module, the network module and the power supply module are all arranged on the circuit board 4; the shield 7 is provided with a sound inlet hole 9, a wire outlet hole can be arranged on the shield 1 or the base 1, and a plurality of sound inlet holes 9 can be arranged; when the device is installed, the base 1 is installed on the wall surface, the protective cover 7 is installed on the base 1, and the wire is connected to a circuit in a museum through the connecting joint; when maintenance and disassembly are needed, the connecting joint of the wire and the line is disconnected, then the protective cover 7 is disassembled from the base 1, the circuit board 4 can be exposed without disassembling the base 1 and the protective cover 7 from the base 1, the disassembly and assembly process is simplified, and the installation and the maintenance of the circuit board 4 are convenient.

Further, as shown in fig. 7 to 10, the shield 7 is screwed or hooked on the front surface of the base 1, the front surface of the base 1 near the edge is provided with the annular connecting portion 3, the shield 7 is connected to the connecting portion 3 in a matching manner and is substantially aligned with the outer edge of the base 1 after being installed, and the appearance is beautiful;

the inner wall of the shield 7 is provided with a plurality of supporting blocks 8, the circuit board 4 is fixed on the supporting blocks 8 through bolts, and the circuit board 4 is arranged on one side of the supporting blocks 8 facing the base 1, so that the circuit board 4 can be conveniently mounted and dismounted; preferably, the microphone 5 is arranged on the back of the circuit board 4, and is closer to the sound inlet hole 9; preferably, the inner wall of the base 1 is provided with a reinforcing rib.

Further, as shown in fig. 8, a locking block 10 is further disposed on the inner side of the shield 7, a threaded blind hole 11 is disposed in the locking block 10, a fixing hole corresponding to the threaded blind hole 11 is disposed on the base 1, and the shield 7 is fixed by a fixing member disposed in the threaded blind hole 11 and the fixing hole; after the guard shield 7 is screwed or clamped on the base 1, the guard shield 7 is fixed again through the bolt, the fixation is firmer, and the guard shield 7 is prevented from loosening and falling after long-term use.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims (8)

1. Sound rechecking alarm detector, its characterized in that: the system comprises a CPU module, a BNPU module, at least one microphone (5) connected with the BNPU module, an audio conversion module connected with the BNPU module, an alarm output module, a network module used for connecting a network and a power supply module used for supplying power to components; the BNPU module, the audio conversion module and the alarm output module are respectively and electrically connected with the CPU module; the BNPU module internally comprises an AGC circuit;

the sound collected by the microphone (5) is processed and amplified by an AGC circuit, then converted into a digital signal by a BNPU module for noise reduction and keyword recognition, and a recognition result signal is output, the CPU module receives the recognition result signal and outputs the recognition result signal to an external alarm device by an alarm output module, and meanwhile, digital audio for recognition is synchronously output by an I2S, converted into a PCM voice signal by the CPU module and transmitted back to a background server by a network module.

2. The acoustic review alarm detector of claim 1, wherein: the network module comprises a transceiver module connected with the CPU module, a network transformer connected with the transceiver module and a network port J5 connected with the network transformer.

3. The acoustic review alarm detector of claim 1, wherein: the BNPU module is electrically connected with a memory, a debugging serial port connector J4 and two microphone (5) connecting seats, and the microphone (5) is connected to the BNPU module through the microphone (5) connecting seats.

4. The acoustic review alarm detector of claim 1, wherein: the alarm output module is an optical coupling isolation output module; the power supply module comprises a power supply interface J8 for external power access, a voltage output end 3V3 and a voltage output end 1V 2.

5. The acoustic review alarm detector of claim 1, wherein: the lifting module is connected between the CPU module and the audio conversion module and lifts the reference level output by the audio conversion module, the lifting module is connected with a simulated audio output test seat J2, and the I2S audio signal converted by the audio conversion module can be amplified by the lifting module and then output by the simulated audio output test seat J2.

6. The acoustic review alarm detector of claim 1, wherein: the device is characterized by further comprising a base (1) and a shield (7), wherein the base (1) is used for being mounted on a mounting surface, the shield (7) is detachably connected with the base (1), a circuit board (4) is arranged in the shield (7), and the CPU module, the BNPU module, the microphone (5), the audio conversion module, the alarm output module, the network module and the power supply module are all arranged on the circuit board (4); the shield (7) is provided with a sound inlet hole (9).

7. The acoustic review alarm detector of claim 6, wherein: guard shield (7) threaded connection or pothook are connected the front of base (1), the inboard of guard shield (7) still is provided with locking block (10), be provided with screw thread blind hole (11) in locking block (10), be provided with on base (1) with the fixed orifices that screw thread blind hole (11) correspond, guard shield (7) are fixed through the mounting that sets up in screw thread blind hole (11) and fixed orifices.

8. The acoustic review alarm detector of claim 6, wherein: the inner wall of the shield (7) is provided with at least two supporting blocks (8), and the circuit board (4) is fixed on the supporting blocks (8) through bolts.

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