CN107421604A - A kind of audio material-level detection system and method - Google Patents
A kind of audio material-level detection system and method Download PDFInfo
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- CN107421604A CN107421604A CN201710286404.5A CN201710286404A CN107421604A CN 107421604 A CN107421604 A CN 107421604A CN 201710286404 A CN201710286404 A CN 201710286404A CN 107421604 A CN107421604 A CN 107421604A
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- sound
- level detection
- audio material
- container
- signal
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention provides a kind of audio material-level detection system and method, for detecting the material position of container in pig farm, including：Signal generating mechanism, signal receiving structure and main control mechanism；Wherein signal generating mechanism is used to produce voice signal to be measured and be transferred to signal receiving structure, has the first connector and sound-producing device；Signal receiving structure is used to receive voice signal to be measured and be transferred to master board, has the second connector and reception device；Main control mechanism includes control panel, high-pass filter and computer system.It is an advantage of the invention that, it is contactless not realized under the influence of by outside environmental elements, i.e., the mode that need not be contacted with material to be measured, the volume of material in container is detected, and various materials can be detected, the mixture of liquid, solid or solid-liquid.
Description
Technical field
The present invention relates to sound processing techniques field, in particular to a kind of audio material-level detection system and method.
Background technology
With the development of modern society, people rise steadily to the demand of pork, there is provided a kind of intelligence, science, efficiently
Pig raising system is necessary.But generation by generation research and development of pig raising system and coming into operation but present one by one
The problem of, such as the extensive disease condition for checking pig, pig canopy is cleared up on a large scale, pig feed etc. is changed in timing.
By changing for pig feed, put into certain feed in container, after pig is edible it is remaining on earth how much, how poultry raiser judges whether
The problems such as pig feed should be added, it is necessary to have certain normative reference.This just needs us to develop a kind of material-level detection system, only
Energy detection, timing update, clean, efficient, health, realize really intelligent raise.But existing detecting system must be straight
Material in contact container can just measure, and when material is solidliquid mixture, measurement result is easily inaccurate
Etc., the present invention proposes a kind of new audio material-level detection system to overcome these difficult points.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of audio material-level detection system, for detecting in pig farm
The material position of container, including：
Signal generating mechanism, signal receiving structure and main control mechanism；Wherein signal generating mechanism has the first connector
And sound-producing device, for producing voice signal to be measured and being transferred to signal receiving structure；Signal receiving structure has the second connection
Device and reception device, for receiving voice signal to be measured and being transferred to main control mechanism；Main control mechanism includes control panel, height
Bandpass filter and computer system.
Preferably, sound-producing device can be loudspeaker and reception device can be loudspeaker.
Preferably, sound-producing device is connected by cable with the first connector, and reception device is connected by cable with second
Device connects.
Preferably, the first connector and the second connector are respectively connecting to the both ends of main control mechanism.
Preferably, sound-producing device is respectively arranged with lid and sound-producing device lower cover on sound-producing device up and down, for protecting sounding
Device；And accordingly, reception device is respectively arranged with lid and reception device lower cover in reception device up and down, and dress is received for protecting
Put.
Preferably, sound-producing device and reception device are fixed on testing container using double faced adhesive tape or other fixing devices respectively
Both ends.
Preferably, high-pass filter can be Chebyshev's high-pass filter, for filtering off direct current signal.
Preferably, computer system includes software systems, for carrying out mathematics to the data after high pass filter, processes
Change simultaneously comparative result.
Preferably, the present invention provides a kind of audio material level detection method, the described method comprises the following steps：
A, the detected value of empty container is measured using audio material-level detecting device；
B, equivalent increases material into container successively, and voice signal is after container is propagated by high-pass filter and meter
Calculation machine system-computed draws detected value, records the detected value, then continues to increase material, will be all untill filling it up with container
Detected value count, it is necessary to establish different moulds when making the template corresponding lists, wherein material difference of volume and detected value
Plate corresponding lists；
C, in use, measuring the measured value in device to be detected using audio material-level detecting device, by the measured value with
Template corresponding lists are contrasted one by one, you can measure volume of the material in container.
Preferably, above-mentioned steps A, B, C detection process is as follows：Voice is played by signal generating mechanism, sound is through holding
Device is gathered after propagating by signal receiving structure, is then pre-processed by the high-pass filter in main control mechanism, finally counted again
Calculation machine system carries out feature extraction, final output result to pretreated signal.
Following beneficial effect is possessed according to audio material-level detection system of the present invention：
The present invention is realized to container contents in pig canopy by setting a kind of audio material-level detection system and its corresponding method
Detection, i.e. control panel control sound-producing device send sound, by the propagation of container contents, received by reception device, so
Audio signal is transferred to main control mechanism afterwards, after the pretreatment of high-pass filter, feature is carried out to the signal after processing
Extraction, finally with being contrasted with reference to template according to criterion, then output result, system can be according under output result judgements
Which kind of instruction is one step should carry out.The object of the present invention is to it is contactless not realized under the influence of by outside environmental elements, i.e.,
The mode that need not be contacted with material to be measured, is detected to the volume of material in container, and can detect a variety of things
Material, the mixture of liquid, solid or solid-liquid.
Brief description of the drawings
For a better understanding of the present invention, the embodiment of the present invention is illustrated below in conjunction with accompanying drawing, wherein：
Fig. 1 is the structural representation according to the audio material-level detection system of one embodiment of the invention；
Fig. 2 is the structural representation according to the signal generating mechanism of the audio material-level detection system of the present invention；
Fig. 3 is the structural representation according to the signal receiving structure of the audio material-level detection system of the present invention；
Fig. 4 is the structural representation according to the main control mechanism of the audio material-level detection system of the present invention；
Fig. 5 is the FB(flow block) according to the audio material level detection method of the present invention；
Fig. 6 is the FB(flow block) pre-processed in the audio material level detection method shown in Fig. 5；
Fig. 7 be Fig. 5 shown in audio material level detection method in feature extraction FB(flow block).
Wherein, 10 be signal generating mechanism, and 20 be signal receiving structure, and 30 be main controlling organization, and 40 be cable, and 101 are
First connector, 102 be to be covered on sound-producing device, and 103 be sound-producing device, and 104 be sound-producing device lower cover, and 105 be double faced adhesive tape, 201
It is to be covered in reception device for the second connector, 202,203 be reception device, and 204 be reception device lower cover, and 301 be high-pass filtering
Device, 302 be control panel.
Embodiment
Carried out below with reference to the design of embodiment and accompanying drawing to the present invention, concrete structure and caused technique effect clear
Chu, complete description, to be completely understood by the purpose of the present invention, scheme and effect.It should be noted that in situation about not conflicting
Under, the feature in embodiment and embodiment in the application can be mutually combined.The identical accompanying drawing mark used everywhere in accompanying drawing
Note indicates same or analogous part.
With reference to figure 1, a kind of audio material-level detection system according to a particular embodiment of the invention is shown in Fig. 1, is used for
The material position of detection container, including：Signal generating mechanism 10, signal receiving structure 20 and main control mechanism 30；Wherein signal occurs
Mechanism 10 is with lid 102 and sound-producing device lower cover 104 on the first connector 101, sound-producing device 103, sound-producing device, for producing
Voice signal to be measured is simultaneously transferred to signal receiving structure 20；Signal receiving structure 20 is with the second connector 201, reception device
Lid 202, reception device lower cover 204 and reception device 203, for receiving voice signal to be measured and being transferred to main control mechanism
30；The main control mechanism 30 includes control panel 302, high-pass filter 301 and computer system.
With reference to figure 2 and 3, signal generating mechanism 10 is connected to main control mechanism 30 by the first connector 101, and signal receives
Mechanism 20 is connected to main control mechanism 30 by the second connector 201.Generally, the first connector 101 and the second connector 201 divide
The both ends of main control mechanism 30 or container are not arranged on, and in other words, the first connector 101 and the second connector 201 are relative
What ground was set.When control panel 302 distinguishes control signal generating mechanism 10 and signal receiving structure 20, by signal generating mechanism
10 voice signals sent are propagated in a reservoir, are received by signal receiving structure 20.Due to the present invention application environment be
In pigsty, in order to ensure that instrument is not damaged, signal generating mechanism 10 and signal receiving structure 20 are all protected using upper and lower covers
Shield, and fixed by double faced adhesive tape 105.If can not be fixed with adhesive tape, cause signal generating mechanism 10 or signal receiver
Structure 20 shifts, then in measurement process, the transmission of sound will be influenceed by distance etc., it could even be possible to sound does not pass through
Container is just received.So, our measurement result has huge deviation certainly.Preferably, double faced adhesive tape 105 can be
The glue of 3M VHB 4910 or the foam rubbers of TESA 62505.In production process from now on, as long as fixed signal can be reached
The purpose of mechanism 10 and signal receiving structure 20, any fixing device are all feasible.
According to the preferred embodiment of the present invention, the sound-producing device 103 of signal generating mechanism 10 can be loudspeaker.According to
Production needs, or frequency selection needs, and can design different circuits to send voice signal, it might even be possible to by means of raising one's voice
Device etc..In addition, sound-producing device 103 can built-in A/D chips, the speech simulation signal for sound-producing device 103 to be sent turns
Data signal is changed to, it is transmitted in a manner of data signal.
According to the preferred embodiment of the present invention, the reception device 203 in signal receiving structure 20 can be microphone.
Voice signal can be converted to audio signal by microphone as a kind of microphone, it should be noted that in order to ensure sound
High-fidelity and subsequent treatment, microphone are more excellent than sensor.In addition, reception device 203 can built-in D/A chips, for will
Data signal through container is converted to analog signal.
With reference to figure 4, Fig. 4 is the structural representation according to the main control mechanism 30 of the present invention.Height in main control mechanism 30
Frequency wave filter 301 can be Chebyshev's high frequency filter, it is therefore an objective to be pre-processed to gathering the voice signal come.By cutting
Than avenging husband's wave filter, direct current signal can be filtered off.Enter line function processing by simulation softward in computer system afterwards and draw knot
Fruit.
With reference to figure 5, Fig. 5 is the FB(flow block) according to a kind of audio material level detection method of the present invention.Sound is in media as well
During propagation, acoustic energy can occur to change accordingly, and this audio material level detection method is propagated using specific voice in medium
Afterwards, energy changes principle detects the material in pigsty in container.The flow of the present invention is as follows：By signal generating mechanism
10 play voice, and voice signal is propagated and then gathers voice by signal receiving structure 20 in a reservoir, the voice delivery after collection
High-pass filter 301 into main control mechanism 30, by pretreatment, feature extraction further is carried out to voice signal, then
By the data extracted with being contrasted with reference to template according to criterion, last output result.In this flow, first have to what is carried out
It is the foundation with reference to template.Because the system is in order to detect the volume condition of container contents in pigsty, so we are ginseng
It is according to template-setup：Detection numerical value during container dead slot, i.e. according to above-mentioned steps, play voice first, then gather language again
Sound, the voice of collection is pre-processed afterwards, such as filter off direct current signal, carried out again by simulation softward after pretreatment
Feature extraction, finally obtain template data.Next, detected value is measured after the material of increase equal volume successively, until thing
Untill material fills it up with container, volume and the template corresponding lists of detected value so can be obtained by.In view of the degree of accuracy of detection, I
Can try one's best the material unit added each time is minimized, repeatedly measurement, then obtains average value.
According to an of the invention preferred embodiment, during material difference, e.g., only solid or only liquid or solid-liquid mixing, respectively
Need to establish different template corresponding lists.
With reference to figure 6, Fig. 6 is the flow chart pre-processed in the audio material level detection method shown in Fig. 5.Chebyshev filters
Device is filtered to analog signal, obtains required frequency band, then enters line function processing, i.e., is detected according to specific frequency specific
The energy of frequency.Generally we use raised cosine window, i.e. Haning windows, can so eliminate High-frequency Interference and leakage can and also it is short-sighted
Frequency frequency characteristic is good.
With reference to figure 7, Fig. 6 is characterized the FB(flow block) of extraction.After the processing of high frequency filter 301, it would be desirable to enter
One step carries out feature extraction to data in computer systems.Discrete Fourier transform is carried out first：
And then obtain the short-time rating spectrum of voice signal：
P (k)=Y (k) Y*(k)=| Y (k) |2 (2)
Because we only need to extract some specific frequency components, so need to use MEL frequency filter groups, will be general
The formula that passband rate is transformed into MEL frequencies is：
Ask formula (3) reciprocal, obtain：
Frequency spectrum MEL frequency spectrum formula have just been obtained into by one group of MEL wave filter：
And then cepstrum coefficient H is obtained on the basis of formula (5)m(k)：
The MEL frequency cepstral coefficient MFCC of surveyed voice signal are obtained with reference to formula (2) and coefficient formula reciprocal (6), should
Coefficient is the static nature of voice to be measured：
In order to measure the behavioral characteristics of voice to be measured, we also need to further handle above-mentioned data, are to formula first
(7) take the logarithm, strengthen its anti-interference：
Then inverse transformation is done, that is, seeks cepstrum：
The behavioral characteristics that Difference Calculation describes voice to be measured are further carried out on the basis of cepstrum formula (9), it is last defeated
Go out result.
Present invention provides a kind of audio material level detection method, the described method comprises the following steps：
A, the detected value of empty container is measured using audio material-level detecting device；
B, equivalent increases material into container successively, and voice signal passes through high-pass filter 301 after container is propagated
Detected value is calculated with computer system, records the detected value, then continues to increase material, will untill filling it up with container
All detected values count, it is necessary to establish difference when making the template corresponding lists, wherein material difference of volume and detected value
Template corresponding lists；
C, in use, measuring the measured value in device to be detected using audio material-level detecting device, by the measured value with
Template corresponding lists are contrasted one by one, you can measure volume of the material in container.
Above is the preferable implementation to the present invention is illustrated, but the invention is not limited to the implementation
Example, those skilled in the art can also make a variety of equivalent variations on the premise of without prejudice to spirit of the invention or replace
Change, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (10)
1. a kind of audio material-level detection system, the material position for detection container, it is characterised in that including：Signal generating mechanism
（10）, signal receiving structure（20）With main control mechanism（30）；
Wherein described signal generating mechanism（10）With the first connector（101）And sound-producing device（103）, for producing sound to be measured
Sound signal is simultaneously transferred to the signal receiving structure（20）；
The signal receiving structure（20）With the second connector（201）And reception device（203）, for receiving sound letter to be measured
Number and be transferred to the main control mechanism（30）；
The main control mechanism（30）Including control panel（302）, high-pass filter（301）And computer system.
A kind of 2. audio material-level detection system according to claim 1, it is characterised in that wherein described sound-producing device
（103）It is loudspeaker and the reception device（203）It is loudspeaker.
A kind of 3. audio material-level detection system according to claim 1, it is characterised in that wherein described sound-producing device
（103）Pass through cable（40）With the first connector（101）Connection, and the reception device（203）Pass through cable（40）With second
Connector（201）Connection.
A kind of 4. audio material-level detection system according to claim 1, it is characterised in that wherein described first connector
（101）With the second connector（201）It is respectively connecting to the main control mechanism（30）Both ends.
A kind of 5. audio material-level detection system according to claim 1, it is characterised in that wherein described sound-producing device
（103）It is respectively arranged with sound-producing device and covers up and down（102）With sound-producing device lower cover（104）, for protecting the sound-producing device
（103）;And accordingly, the reception device（203）It is respectively arranged with reception device and covers up and down（202）With reception device lower cover
（204）, for protecting the reception device（203）.
A kind of 6. audio material-level detection system according to claim 1, it is characterised in that wherein described sound-producing device
（103）And reception device（203）Double faced adhesive tape is used respectively（105）Or other fixing devices are fixed on the both ends of testing container.
A kind of 7. audio material-level detection system according to claim 1, it is characterised in that wherein described high-pass filter
（301）Can be Chebyshev's high-pass filter, for filtering off direct current signal.
A kind of 8. audio material-level detection system according to claim 7, it is characterised in that wherein described computer system bag
Containing software systems, for through high-pass filter（301）Data after processing carry out mathematics conversion and comparative result.
9. a kind of audio material level detection method, it is characterised in that the described method comprises the following steps：
A, the detected value of empty container is measured using audio material-level detecting device；
B, equivalent increases material into container successively, and voice signal passes through high-pass filter after container is propagated（301）With
Detected value is calculated in computer system, records the detected value, then continues to increase material, untill filling it up with container, by institute
Some detected values count, it is necessary to establish different when making the template corresponding lists, wherein material difference of volume and detected value
Template corresponding lists；
C, in use, measuring the measured value in device to be detected using audio material-level detecting device, by the measured value and template
Corresponding lists are contrasted one by one, you can measure volume of the material in container.
10. a kind of audio material level detection method according to claim 9, it is characterised in that described step A, B, C detection
Process is as follows：Pass through signal generating mechanism（10）Voice is played, sound is after container is propagated by signal receiving structure（20）Collection,
Then again by main control mechanism（30）In high-pass filter（301）Pre-processed, after last computer system is to pretreatment
Signal carry out feature extraction, final output result.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710286404.5A CN107421604A (en) | 2017-04-26 | 2017-04-26 | A kind of audio material-level detection system and method |
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| CN201710286404.5A CN107421604A (en) | 2017-04-26 | 2017-04-26 | A kind of audio material-level detection system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060077A (en) * | 2018-08-16 | 2018-12-21 | 杭州容大智造科技有限公司 | A kind of equipment and Wiper system using bath of glass height in sound detection water tank |
| CN109141583A (en) * | 2018-08-16 | 2019-01-04 | 杭州容大智造科技有限公司 | A kind of equipment and Wiper system using bath of glass height in time detection water tank |
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| CN101706302A (en) * | 2009-09-24 | 2010-05-12 | 张仲生 | Cavity resonance method measuring instrument |
| CN102252729A (en) * | 2011-06-08 | 2011-11-23 | 张仲生 | Device and method for measuring volume of irregular object |
| CN105181070A (en) * | 2015-09-21 | 2015-12-23 | 深圳麦开网络技术有限公司 | Method and device for measuring liquid volume in container on basis of sound resonance |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101706302A (en) * | 2009-09-24 | 2010-05-12 | 张仲生 | Cavity resonance method measuring instrument |
| CN102252729A (en) * | 2011-06-08 | 2011-11-23 | 张仲生 | Device and method for measuring volume of irregular object |
| CN105181070A (en) * | 2015-09-21 | 2015-12-23 | 深圳麦开网络技术有限公司 | Method and device for measuring liquid volume in container on basis of sound resonance |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060077A (en) * | 2018-08-16 | 2018-12-21 | 杭州容大智造科技有限公司 | A kind of equipment and Wiper system using bath of glass height in sound detection water tank |
| CN109141583A (en) * | 2018-08-16 | 2019-01-04 | 杭州容大智造科技有限公司 | A kind of equipment and Wiper system using bath of glass height in time detection water tank |
| CN109141583B (en) * | 2018-08-16 | 2020-11-17 | 杭州容大智造科技有限公司 | Equipment for detecting height of glass water in water tank by using time and windshield wiper system |
| CN109060077B (en) * | 2018-08-16 | 2021-09-03 | 杭州容大智造科技有限公司 | Equipment for detecting glass water height in water tank by using sound and windshield wiper system |
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