CN209280640U - A kind of acoustic sensor array control circuit for acoustics camera - Google Patents
A kind of acoustic sensor array control circuit for acoustics camera Download PDFInfo
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- CN209280640U CN209280640U CN201821843600.4U CN201821843600U CN209280640U CN 209280640 U CN209280640 U CN 209280640U CN 201821843600 U CN201821843600 U CN 201821843600U CN 209280640 U CN209280640 U CN 209280640U
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- 230000005236 sound signal Effects 0.000 claims abstract description 8
- 230000005284 excitation Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000001939 inductive effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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Abstract
The utility model discloses the acoustic sensor array control circuits for acoustics camera, acoustic sensor array, digital sound signal processing module, main control unit, wherein main control unit includes crystal oscillator, bit clock phaselocked loop, byte phaselocked loop, bit clock allocation unit, byte clock allocation unit and converter；Acoustic sensor array is equipped with 8 branches, and 8 acoustic sensor units are evenly distributed on each road, and 8 acoustic sensor units include 4 main channel sensors and 4 accessory channel sensors.The utility model has the beneficial effects that the accessory channel sensor in the multiple sonic transducer units installed on acoustic sensor array including main channel sensor and corresponding thereto, the same main control unit issues clock source signals, signal distributes output signal to the microphone unit of array by distributor, the clock signal from same clock source is transmitted to acoustic sensor, the clock signal synchronization of acoustic sensor unit is effectively ensured.
Description
Technical field
The utility model belongs to sound source analysis technical field, more particularly, to a kind of acoustic sensor for acoustics camera
Array Control Circuit.
Background technique
In sound and image synthesis acquisition technique, acoustics camera is as the visual tip measurement equipment of sound is made
The new technical equipment needed in the field of the multiplicity such as multi-media information communication equipment, household electrical appliances, automobile, building.Acoustics camera is benefit
The special equipment that a certain range of sound-filed simulation is measured with acoustic sensor array can be used for measuring the sound of object sending
The state of position and acoustic radiating, and show intuitive image with cloud atlas mode, i.e. acoustic imaging measures.
Acoustic sensor array is the sound wave occurred using multiple acoustic sensors measurement sound source, is adopted by acoustic sensor
Collect sound-source signal.Multiple acoustic sensors on existing acoustic sensor array are respectively to be sent out signal by different clock sources
Send into different sensors, but be different clock source send will cause acoustic sensor signal it is asynchronous, cause signal
The poor synchronization of acquisition, so that the precision for influencing acoustic sensor array acquisition is low.
Utility model content
The purpose of the utility model is to provide a kind of structures simply, acoustic sensor signal synchronism is high, acquisition precision is high
The acoustic sensor array control circuit for acoustics camera.
The technical solution of the utility model is as follows:
A kind of acoustic sensor array control circuit for acoustics camera, comprising:
Acoustic sensor array, the voice signal for inductive pick-up sound source；
Digital sound signal processing module is handled for receiving the voice signal and is converted to digital signal；
Main control unit, for the acoustic sensor array issue excitation clock signal and receive the digital signal and
Optical imagery obtains acoustic data frame and image data frame with optical image security according to the digital signal；
The main control unit includes crystal oscillator, bit clock phaselocked loop, byte phaselocked loop, bit clock allocation unit, word
Clock distribution unit and converter are saved, the crystal oscillator is for issuing bit clock signal and byte clock signal, institute's rheme
For clock phase-locked loop for the bit clock signal to be sent in institute's bit clock allocation unit, the byte phaselocked loop is used for will
The bit signals are sent in the byte clock allocation unit, institute's bit clock allocation unit and byte clock unit difference
It distributes the bit clock signal received and byte clock signal to multiple output signals and is sent in the converter, described turn
Parallel operation is delivered to acoustic sensor unit for receiving and converting the bit clock signal and bit signals；
The acoustic sensor array is equipped with 8 branches, and is evenly distributed with 8 acoustics on each branch road and passes
Sensor cell, 8 acoustic sensor units include 4 main channel sensors and 4 accessory channel sensors, each described
Each of the corresponding accessory channel sensor electrical connection of main channel sensor, the converter and the main channel sense
The corresponding electrical connection of device.
In the above-mentioned technical solutions, one converter of each corresponding electrical connection of the main channel sensor, and it is described
The quantity of converter is 32.
In the above-mentioned technical solutions, institute's bit clock allocation unit includes 8 bit clock distributors, and the bit clock distributes
Device uses one point four of clock distributor.
In the above-mentioned technical solutions, the byte clock allocation unit includes 8 byte clock distributors, and when the byte
Clock distributor uses one point four of clock distributor.
In the above-mentioned technical solutions, the converter uses two into one converters gone out.
In the above-mentioned technical solutions, the acoustic sensor unit on curved surface or plane helically gradually divide by open form circle battle array
Cloth.
In the above-mentioned technical solutions, the main channel sensor and the accessory channel sensor are connected by parallel twisted pairs
It connects.
The utility model has the advantages and positive effects of:
1. in the multiple sonic transducer units installed on acoustic sensor array include main channel sensor and with its phase
Corresponding accessory channel sensor, the same main control unit issue clock source signals, and signal passes through distributor to the transaudient of array
Device unit distributes output signal, to transmit the clock signal from same clock source to acoustic sensor, acoustics is effectively ensured
The clock signal synchronization of sensor unit reduces the synchronous error of clock signal, and that improves the data sampling of acoustic sensor can
By property.
2. converter is converted to an output signal after receiving bit clock signal and byte clock signal, by two paths of signals
After retransmit into sensor unit, be effectively ensured transmission signal synchronization, improve the stabilization of the data sampling of acoustic sensor
Property.
3. byte clock and bit clock cooperate, acquisition is accurately positioned in the collected data of sensor, guarantees acquisition data
The globality of transmission is high.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the acoustic sensor array control circuit for acoustics camera of the utility model；
Fig. 2 is the structural schematic diagram for the clock synchronous network network that master control sends excitation clock in the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with specific embodiment.It should be appreciated that described herein
Specific embodiment is used only for explaining the utility model, is not used to limit the utility model, is never limited in the utility model
Protection scope.
Embodiment 1
As shown, the acoustic sensor array control circuit for acoustics camera of the utility model, comprising:
Acoustic sensor array, the voice signal for inductive pick-up sound source；
Digital sound signal processing module (model ADAU7002) is handled for receiving voice signal and is converted to number
Word signal；
Main control unit, for issuing excitation clock signal to acoustic sensor array and receiving digital signal and optical picture
Picture obtains acoustic data frame and image data frame according to digital signal and optical image security；
When main control unit includes crystal oscillator, bit clock phaselocked loop, byte phaselocked loop, bit clock allocation unit, byte
Clock allocation unit and converter, crystal oscillator are used for issuing bit clock signal and byte clock signal, bit clock phaselocked loop
In bit clock signal to be sent in bit clock allocation unit, byte phaselocked loop is used to for bit signals to be sent to byte clock point
With in unit, bit clock allocation unit and byte clock unit are respectively by the bit clock signal received and byte clock signal point
It with multiple output signals and is sent in converter, converter is used to receiving and converting bit clock signal and bit signals, and defeated
It send to acoustic sensor unit；
Acoustic sensor array is equipped with 8 branches, and 8 acoustic sensor lists are evenly distributed on each road
Member, 8 acoustic sensor units include 4 main channel sensors and 4 accessory channel sensors, each main channel sensor with
Its corresponding each accessory channel sensor electrical connection, converter electrical connection corresponding with main channel sensor.
It further says, bit clock allocation unit includes 8 bit clock distributors, and the bit clock distributor uses one point
Four clock distributor, byte clock allocation unit includes 8 byte clock distributors, and the byte clock distributor uses one
Divide four clock distributor, wherein the model CDCLVC1004 of clock distributor.
It further says, converter uses two into one converters gone out, the model ADAU7002 of converter.
Further say, the data that sensor sample obtains be with bit (position) be unit, wherein bit clock i.e. how long when
Between acquire it is primary；Byte clock is the data obtained in sensor sample, and according to the data that sampling obtains, determination is searched out
The position of 20bit, bit clock determine the position of a data in data, and byte clock is in the position according to a data
It postpones and determines and be subject to a data position 20 positions below, so that processing is believed for 20 clocks once transmitted
Number, treated, and 20 clock signals are sent in main control unit.
Further say, crystal oscillator and bit clock phaselocked loop, byte phaselocked loop are an entirety, crystal oscillation signal into
Enter to after corresponding bit clock phaselocked loop, byte phaselocked loop, the signal come out from bit clock phaselocked loop, byte phaselocked loop is
3.072MHz, the output clock after signal processing are 48KHz, are suitble to the sample frequency of acoustic sensor unit.
A kind of control method of the acoustic sensor array control circuit for acoustics camera, comprising the following steps:
(1) crystal oscillator in main control unit passes through bit clock phaselocked loop respectively and byte phaselocked loop is converted to bit clock
Signal and byte clock signal, and send the signal in bit clock allocation unit and byte clock allocation unit；
(2) bit clock allocation unit distributes 32 bit clock output signals by 8 clock distributors, and when by this
Clock output signal is sent in converter, while byte clock allocation unit distributes 32 bytes by 8 clock distributors
Clock signal output signal, and by the byte clock output signal be sent to in its one by one corresponding 32 converters；
(3) after converter receives bit clock output signal and byte clock signal output signal, when by 32 positions
Be sent to after clock output signal and the conversion of 32 byte clock output signals in its one by one corresponding 32 main channel sensors,
Bit clock output signal and byte clock signal are outputed signal to corresponding thereto attached by each main channel sensor transmissions
In channel sensor, to complete the synchronization of the bit clock signal and byte clock signal of acoustic sensor unit；
(4) after bit clock signal and byte clock signal synchronously complete, acoustic sensor cell operation, acquisition sound are triggered
The voice signal in source, and the voice signal is sent to digital sound signal processing module；
(5) digital sound signal processing module carries out processing to voice signal and is converted to digital signal, and by the digital signal
It is sent to main control unit, to complete the control of acoustic sensor array.
The sample frequency of acoustic sensor unit is 48KHz, and data output is transmitted using one wire system, by same
A crystal oscillator is simultaneously emitted by bit clock signal and byte clock signal excitation main channel sensor and accessory channel sensor,
It converts the signal frequency 3.072MHz for the input clock that crystal oscillator issues to the 48KHz of output clock, guarantees clock letter
Number synchronization, and ensure that sound source sampling high synchronism and high reliability.
Embodiment 2
On the basis of embodiment 1, the number of sensor meets 2n, digital sound signal handles and the mechanism of data transmission
Expanded according to the allocation plan of embodiment 1 is corresponding respectively, the synchronization of clock can be completed.
Embodiment 3
On the basis of embodiment 1, the quantity of sensor situation can be adjusted according to actual needs, can increase biography
Sensor quantity can also reduce the quantity of sensor.
Wherein, by taking 128 sensors as an example, based on the formation of the sensor of embodiment 1, phase is carried out to its branch
Corresponding extension, can be completed the array arrangement of 128 sensors, to obtain the good acoustic sensor array of synchronism.
Embodiment 4
On the basis of embodiment 1, main control unit uses FPGA unit, and digital sound signal processing module uses ADAU core
Stereo impulse modulation (PDM) bit stream can be converted to pulse code modulated audio (PCM) data by piece, ADAU chip, simultaneously also
TDM time slot can be configured.The helically gradually open form circle battle array distribution on curved surface or plane of acoustic sensor unit.
One embodiment of the present invention has been described in detail above, but the content is only preferable implementation of the invention
Example, should not be considered as limiting the scope of the invention.It is all according to equivalent variations made by the present patent application range and improve
Deng should still be within the scope of the patent of the present invention.
Claims (7)
1. a kind of acoustic sensor array control circuit for acoustics camera characterized by comprising
Acoustic sensor array, the voice signal for inductive pick-up sound source；
Digital sound signal processing module is handled for receiving the voice signal and is converted to digital signal；
Main control unit, for issuing excitation clock signal to the acoustic sensor array and receiving the digital signal and optics
Image obtains acoustic data frame and image data frame with optical image security according to the digital signal；
When the main control unit includes crystal oscillator, bit clock phaselocked loop, byte phaselocked loop, bit clock allocation unit, byte
Clock allocation unit and converter, the crystal oscillator is for issuing bit clock signal and byte clock signal, institute's bit clock
For phaselocked loop for the bit clock signal to be sent in institute's bit clock allocation unit, the byte phaselocked loop is used for will be described
Bit signals are sent in the byte clock allocation unit, and institute's bit clock allocation unit and byte clock unit will connect respectively
The bit clock signal and byte clock signal received distributes multiple output signals and is sent in the converter, the converter
For receiving and converting the bit clock signal and bit signals, and it is delivered to acoustic sensor unit；
The acoustic sensor array is equipped with 8 branches, and is evenly distributed with 8 acoustic sensors on each branch road
Unit, 8 acoustic sensor units include 4 main channel sensors and 4 accessory channel sensors, and each master is logical
Each of the corresponding accessory channel sensor electrical connection of road sensor, the converter and the main channel sensor phase
Corresponding electrical connection.
2. acoustic sensor array control circuit according to claim 1, it is characterised in that: each main channel sensing
Device one converter of corresponding electrical connection, and the quantity of the converter is 32.
3. acoustic sensor array control circuit according to claim 2, it is characterised in that: institute's bit clock allocation unit
Including 8 bit clock distributors, and the bit clock distributor uses one point four of clock distributor.
4. acoustic sensor array control circuit according to claim 3, it is characterised in that: the byte clock distribution is single
Member includes 8 byte clock distributors, and the byte clock distributor uses one point four of clock distributor.
5. acoustic sensor array control circuit according to claim 4, it is characterised in that: the converter using two into
One converter gone out.
6. acoustic sensor array control circuit according to claim 5, it is characterised in that: the acoustic sensor unit
The helically gradually open form circle battle array distribution on curved surface or plane.
7. acoustic sensor array control circuit according to claim 6, it is characterised in that: the main channel sensor with
The accessory channel sensor is connected by parallel twisted pairs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821843600.4U CN209280640U (en) | 2018-11-09 | 2018-11-09 | A kind of acoustic sensor array control circuit for acoustics camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821843600.4U CN209280640U (en) | 2018-11-09 | 2018-11-09 | A kind of acoustic sensor array control circuit for acoustics camera |
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| CN209280640U true CN209280640U (en) | 2019-08-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696481A (en) * | 2018-11-09 | 2019-04-30 | 天津师范大学 | A kind of acoustic sensor array control circuit and its control method for acoustics camera |
-
2018
- 2018-11-09 CN CN201821843600.4U patent/CN209280640U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696481A (en) * | 2018-11-09 | 2019-04-30 | 天津师范大学 | A kind of acoustic sensor array control circuit and its control method for acoustics camera |
| CN109696481B (en) * | 2018-11-09 | 2024-03-15 | 天津芯盟微电子技术有限公司 | Acoustic sensor array control circuit for acoustic camera and control method thereof |
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Effective date of registration: 20210926 Address after: No. 2006, unit 3, building 1, No. 555, north section of Yizhou Avenue, high tech Zone, Wuhou District, Chengdu, Sichuan 610095 Patentee after: Sichuan Tianyuan hongchuang Technology Co.,Ltd. Address before: 300387 Tianjin city Xiqing District West Binshui Road No. 393 Patentee before: TIANJIN NORMAL University |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231108 Address after: 1-1-701, No.1 Huixue Road, Xuefu Industrial Zone, Xiqing District, Tianjin, 300382 Patentee after: Tianjin Xinmeng Microelectronics Technology Co.,Ltd. Address before: No. 2006, unit 3, building 1, No. 555, north section of Yizhou Avenue, high tech Zone, Wuhou District, Chengdu, Sichuan 610095 Patentee before: Sichuan Tianyuan hongchuang Technology Co.,Ltd. |
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Granted publication date: 20190820 Effective date of abandoning: 20240315 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190820 Effective date of abandoning: 20240315 |