CN202182596U - System of analyzing sound wave transmitting through water body in freezing - Google Patents
System of analyzing sound wave transmitting through water body in freezing Download PDFInfo
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- CN202182596U CN202182596U CN2011200641110U CN201120064111U CN202182596U CN 202182596 U CN202182596 U CN 202182596U CN 2011200641110 U CN2011200641110 U CN 2011200641110U CN 201120064111 U CN201120064111 U CN 201120064111U CN 202182596 U CN202182596 U CN 202182596U
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Abstract
A system of analyzing a sound wave transmitting through a water body in freezing comprises a detector and a processor, wherein, the detector is used for detecting the sound wave transmitting through the water body in freezing, so the detected sound wave is generated; the processor is used for extracting frequency component and amplitude (b) of the frequency component of the detected sound wave (a); and when the amplitude exceeds a threshold value, the water body is removed from a structure.
Description
Copyright notice
A part of disclosure of patent document comprises the material that receives copyright protection.Copyright possessor does not oppose that anyone duplicates patent filing or patent disclosure, as its appear at patent and trademark office patent document or the record in, but the copyright possessor under any circumstance keeps all copyrights to it.
Technical field
The disclosure relates to a kind of ice machine, more specifically, relates to the analysis that aligns the sound wave of propagating through the water body in the ice machine.This is analyzed the identification water body and when freezes, and making can be from the water body of ice machine results as ice.The operation of equipment in the ice machine is also diagnosed in this analysis.
Background technology
The method of describing in these chapters and sections is the method that can carry out, but is not necessarily the previous method that has envisioned or carried out.Therefore, only if point out in addition, otherwise the method for describing in these chapters and sections can not be a prior art for the claim among the application, and can not be recognized as prior art in these chapters and sections because of being included in.
For the efficient operation of ice machine, be desirably in and just remove ice at once after being completed into ice, this also is called as results ice.Such ice results allow to introduce new water body, make to form new ice body, thereby make the use maximization of ice machine.
A kind of be used to discern ice ready is the amplitude of monitoring mechanical oscillation through this water body propagation when water body just freezes with the technology that is used to gather in the crops.At the time point of amplitude, suppose that water body is fully icing, and therefore gathered in the crops above predetermined threshold.
This prior art is only used the changes in amplitude that is provided with more than the threshold value to detect ice and is formed.This technology has following defective: it can not distinguish the various possible source of mechanical oscillation, and therefore, is not sure of to change that to result from that the acoustic feature of ice machine changes still be pseudo-acoustic feature in the ambient noise environment.Therefore, prior art not necessarily begins results at Best Times, and therefore, ice machine possibly be lower than the operation of optimum efficiency at.
The utility model content
A kind of system of the sound wave of propagating through this water body when being used for analyzing water body and just freezing is provided, and it comprises: detector, and it detects the sound wave of when water body just structurally freezes, propagating through this water body, so produces detected sound wave; And processor, it extracts the frequency component of (a) detected sound wave and (b) amplitude of frequency component from detected sound wave, and when amplitude during above threshold value, from structure, removes water body.
According to an embodiment of this system, detected sound wave is a time-domain signal, and in order to extract frequency component and amplitude, processor is transformed into frequency-region signal with time-domain signal; And obtain frequency component and amplitude from frequency-region signal.
According to another embodiment of this system, threshold value is a first threshold, and processor also extracts from detected sound wave: a) harmonic wave of frequency component and b) amplitude of harmonic wave; And as i) amplitude surpasses first threshold and sends signal when ii) the amplitude of harmonic wave surpasses second threshold value.
A kind of system of the sound wave of propagating through this water body when being used for analyzing water body and just freezing also is provided, and it comprises: detector, and it detects the sound wave of when water body just freezes on the structure in ice machine, propagating through this water body, so produces detected sound wave; And processor, its analyzing and testing to sound wave to produce the spectrum of detected sound wave, confirm whether spectrum comprises spectrum signature; Therefore produce and confirm the result; Wherein this spectrum signature is when the equipment in the ice machine is operated, to occur, and based on definite result, gives the alarm.
According to an embodiment of this system, if confirm that the result indicates spectrum not comprise spectrum signature, then processor gives the alarm.
According to another embodiment of this system, detected sound wave is a time-domain signal, and the sound wave that arrives for analyzing and testing, and processor is transformed into frequency-region signal with time-domain signal; And obtain spectrum from frequency-region signal.
Description of drawings
Fig. 1 is the functional block diagram of the system that in ice machine, realizes.
Fig. 2 is the functional block diagram of the control panel in the system of Fig. 1.
Fig. 3 A and 3B are the flow chart of the ice sense process that on the control panel of Fig. 2, realizes together.
Fig. 4 is the flow chart that the system diagnostics that on the control panel of Fig. 2, realizes is handled.
Fig. 5 is the operated system block diagram that the system diagnostics of ice sense process and Fig. 3 of execution graph 2 is handled.
In each figure, utilize identical Reference numeral to represent common means or the characteristic of a more than figure.
The specific embodiment
Fig. 1 is the functional block diagram of system's (being called as system 100 here) of in ice machine, realizing.System 100 uses Fast Fourier Transform (FFT) (FFT) algorithm, to carry out various Digital Signal Processing operations from the acoustic signal of ice thickness degree sensor, is used to improve the reliability of ice detection and be used to provide the system diagnostics about the enhancing of ice machine.
Evaporimeter 102 is the structures that are used for forming ice above that.Water pump 106 extracts aqueous waters 115 and makes its circulation, thereby water 115 flows and compiles on evaporimeter 102 and is water body, and promptly freezing becomes the water 103 (in Fig. 1, being illustrated by the broken lines) of solid-state (i.e. ice).
Evaporimeter 102 has the helix tube (not shown), and cold air or hot gas transmit (route) through this helix tube.Compressor 104 helps cold air through the helix tube transmission.When cold air transmitted through helix tube, water 103 froze, and therefore on evaporimeter 102, forms ice.In fact, water 115 is in evaporimeter 102 laminated, and freezes gradually, makes water 103 form ice cube.After water 103 formed ice, hot gas was through the helix tube transmission, therefore to evaporimeter 102 heating and ice is melted slightly, made to remove ice, and more particularly, removed the water 103 of the form that is ice.
Evaporimeter 102 also can comprise the grid (not shown), and it is used to hold water 103 and forms water 103 with the shape of cubical shape or any other expectation.
Sensor 110 (for example, having the barrier film in chamber) is the detector that detects sound wave 108, therefore produces detected sound wave 117.Sensor 110 can be positioned on the surface of evaporimeter 102 for example, perhaps is positioned at any position that it could receive and detect sound wave 108.Acoustic waveguide tube 120 (for example, plastic tube) the detected sound wave 117 of autobiography sensor 110 in the future is coupled to microphone 140.Microphone 140 converts detected sound wave 117 to analog electrical signal 122.Processing module 145 receives analog electrical signals 122, converts thereof into data signal, and it is analyzed, therefore the sound wave 117 that arrives of analyzing and testing effectively.
As mentioned above, sound wave 108 can comprise from mechanical oscillation 105 and one of mechanical oscillation 107 or both contributions.Therefore, one of mechanical oscillation 105 or mechanical oscillation 107 can be the sources of sound wave 108, and therefore, can be the sources that is used for by the detected sound wave 117 of processing module 145 execution analyses.
Each of mechanical oscillation 105 and mechanical oscillation 107 is unique, and therefore, for compressor 104 and equipment 106 each, unique spectrum signature is provided.The sound wave 117 that processing module 145 analyzing and testing arrive, and draw some conclusions about the operation of compressor 104 and pump 106.For example, which ice making stage is processing module 145 just operating in by means of understanding system 100 with communicating by letter of the miscellaneous part of system 100, and understands when compressor 104 should be opened and when compressor 104 should cut out.Therefore, processing module 145 confirms also based on its analysis to detected sound wave 117 whether compressor 104 is opened or closed at its reasonable time.If processing module 145 is confirmed operation correctly of compressors 104, processing module 145 signal 165 that gives the alarm then.Alarm signal 165 can be revealed as the fault indicator on the user interface (not shown in Fig. 1) for example.Processing module 145 carries out similarly confirming for the operation of pump 106, and the operating conditions of alarm signal 165 indication pumps 106.
Fig. 2 is the functional block diagram of control panel 130, and shows the other details of processing module 145.Processing module 145 comprises microcontroller 205 and digital signal processing module 210.
Analog electrical signal 122 As mentioned above, that processing module 145 receives from microphone 140.Microcontroller 205 comprises and is used for analog electrical signal 122 is amplified the analog circuit (not shown) with filtering, and converts analog electrical signal 122 analog-digital converter (A/D) (not shown) of data signal 208 to.Therefore, data signal 208 is numerals of detected sound wave 117.Digital signal processing module 210 receiving digital signals 208 and handle 220 method and come processing digital signal 208 according to being appointed as ice sense process 215 and system diagnostics here.
According to ice sense process 215, digital signal processing module 210 is analyzed data signal 208 and whether has been formed ice with definite water 103, and if, then signal 124 being dealt into relay 150, it correspondingly sends actuated signal 155.Followingly ice sense process 215 is described in more detail with reference to Fig. 3 A and 3B.
Fig. 3 A and 3B are the flow chart of ice sense process 215 together.As mentioned above, according to ice sense process 215, digital signal processing module 210 is analyzed data signal 208 to confirm whether water 103 has formed ice.Ice sense process 215 begins from step 310.
In step 310,100 its icing stages of beginning of system.Therefore, water 115 is layered on the evaporimeter 102, and water 103 freezes.Sensor 110 detects sound wave 108, therefore produce detected sound wave 117, and microphone 140 converts detected sound wave 117 to analog electrical signal 122.Ice sense process 215 advances to step 320 from step 310.
In step 320, the A/D in the microcontroller 205 takes a sample to analog electrical signal 122 with certain sampling frequency (for example, 2.5 KHzs (kHz)), and converts analog electrical signal 122 to data signal 208.Detected sound wave 117 is time-domain signals.Data signal 208 is numerals of detected sound wave 117, and also is time-domain signal therefore.Ice sense process 215 advances to step 330 from step 320.
In step 330, digital signal processing module 210 is transformed into frequency-region signal with data signal 208 from time-domain signal.More specifically, 210 pairs of data signals of digital signal processing module 208 are carried out FFT.FFT confirms the frequency component and their amplitudes separately of detected sound wave 117.For example, digital signal processing module 210 is carried out 256 FFT, and frequency component and their amplitudes separately are saved in FFT array 332.Ice sense process 215 advances to step 340 from step 330.
In step 340, digital signal processing module 210 extracts one or more concern frequency components and their amplitudes separately from FFT array 332.For example, digital signal processing module 210 extracts fundamental component, the second harmonic of fundamental component and the triple-frequency harmonics of fundamental component, and about each the amplitude in fundamental frequency, second harmonic and the triple-frequency harmonics.Fundamental frequency will be the fundamental frequency of for example mechanical oscillation 105 or the fundamental frequency of mechanical oscillation 107.Ice sense process 215 advances to step 350 from step 340.
The fundamental frequency of the fundamental frequency of mechanical oscillation 105 and mechanical oscillation 107 can be the intrinsic property of compressor 104 and pump 106, and is known in advance therefore.Otherwise, can obtain these fundamental frequencies through observing, perhaps can during the mode of learning of ice sense process 215, obtain these fundamental frequencies.For example; In order to learn the fundamental frequency of mechanical oscillation 105; Digital signal processing module 210 by means of with the communicating by letter of the miscellaneous part of system 100, with (a) close compressor 104, and estimate first spectrum of detected sound wave 117; And (b) compressor and starting 104 subsequently, and estimate second spectrum of detected sound wave 117 once more.The fundamental frequency of mechanical oscillation 105 will be rendered as second the spectrum in but not first the spectrum in the dominant frequency component.Can be different from the open/close state of digital signal processing module 210 control compressors 104 as an alternative, system 100 can get into the routine operation pattern and when open or close to digital signal processing module 210 notice compressors 104.
In ensuing two steps, in the early part in the stage of freezing, for example in initial two minutes, before water 130 had formed ice cube, digital signal processing module 210 obtained to pay close attention to the ambient sound level of frequency.
In step 350, digital signal processing module 210 considers whether the stage of freezing is in its early part.If the stage of freezing is in its early part, then ices sense process 215 and advance to step 354 from step 350.If the stage of freezing is not in its early part, then ices sense process 215 and be branched off into step 360 from step 350.
In the step of when the stage of freezing is in its early part, carrying out 354, digital signal processing module 210 will pay close attention to frequency component and their amplitude is stored in the threshold array 352.Ice sense process 215 is circulated back to step 320 from step 354.
Through being circulated back to step 320, and go through step 330,340,350 and 354 and advance, the ambient sound level of paying close attention to frequency is repeated to catch and is stored in the threshold array 352.
In the step of when the stage of freezing is not in its early part, carrying out 360, in the concern frequency with the amplitude in the threshold array 352 each, digital signal processing module 210 calculates average amplitudes.Digital signal processing module 210 adds nargin to this average amplitude, and for example 3 decibels (dB) therefore produced synthetic threshold value, and should synthesize threshold value and store in the threshold register 362.Therefore threshold register 362 will preserve the synthetic threshold value of paying close attention to frequency about each.Ice sense process 215 advances to step 370 from step 360.
In step 370, along with water 103 continues to freeze, digital signal processing module 210 is caught the real-time sample of the sound wave 117 that arrives with processing and detecting.More specifically, digital signal processing module 210 extracts frequency component and their amplitudes separately paid close attention to from detected sound wave 117.Start from signal to noise ratio (snr) preferably, and therefore start from the purpose of data integrity preferably, consider the average real-time amplitude on a certain period, the mean value of five FFT amplitudes that for example on one second the time interval, obtain.Ice sense process 215 advances to step 380 from step 370.
In step 380, digital signal processing module 210 is with the amplitude of the real-time frequency component of paying close attention to and their corresponding amplitude comparison in the threshold register 362.The reason of carrying out this comparison is, when water 103 fully forms ice cube, pay close attention to the real-time amplitude of frequency will be significantly greater than their the real-time amplitude that forms before the ice.
In step 380, if do not have real-time amplitude greater than its corresponding amplitude in the threshold register 362, then digital signal processing module 210 infers that water 103 is fully not icing yet, and digital signal processing module 210 is circulated back to step 370.
In step 380, if about the real-time amplitude of any concern frequency component greater than its corresponding amplitude in the threshold register 362, then digital signal processing module 210 infers that water 103 are fully icing, and digital signal processing module 210 advances to step 390.
Still with reference to step 380; Although advancing to step 390 is described as be in the following situation and takes place: for any concern frequency component; In real time amplitude is greater than its corresponding amplitude in the threshold register 362, but test can be based on the real-time amplitude of the concern frequency component of a certain other minimal amounts greater than its corresponding amplitude in the threshold register 362.For example, test can need three real-time amplitudes of at least two in the concern frequency component greater than its corresponding amplitude in the threshold register 362.
In step 390, digital signal processing module 210 sends signal 124 to relay 150, and it correspondingly sends the actuated signal 155 that makes solenoid 160 energisings.Make solenoid 160 energisings cause the water 130 that has the form of ice from evaporimeter 102 results (promptly removing).
Fig. 4 is that 220 flow chart is handled in system diagnostics.As mentioned above, handle 220 according to system diagnostics, digital signal processing module 210 is analyzed data signals 208 drawing the conclusion about the operation of compressor 104 and pump 106, and if necessary, signal 165 gives the alarm.In brief, the acoustic feature of the equipment in digital signal processing module 210 estimating systems 100 is to determine whether making the equipment energising at reasonable time.Hereinafter has been described the operated system diagnostic process 220 about compressor 104 and pump 106.Yet, system diagnostics handle 220 can be used for the generation mechanical oscillation of estimating system 100 the operation of any equipment (for example, come down in torrents valve, results solenoid and water inlet).System diagnostics is handled 220 and is begun from step 410.
In step 410, system diagnostics is handled 220 and is begun operation.System diagnostics is handled 220 and is advanced to step 420 from step 410.
In step 420, digital signal processing module 210 operates in mode of learning, wherein the mechanical oscillation of digital signal processing module 210 analyses and recording compressed machine 104 and pump 106 generations.For example, by means of with the communicating by letter of the miscellaneous part of system 100, digital signal processing module 210 makes compressor 104 energisings or learns the energising of compressor 104.Compressor 104 be created on manifest in the sound wave 108 and by sensor 110 detected mechanical oscillation 105, to produce detected sound wave 117.The sound wave 117 that digital signal processing module 210 analyzing and testing arrive is to obtain the spectrum signature of compressor 104, i.e. frequency component and amplitude.Digital signal processing module 210 obtains the spectrum signature of pump 106 in a similar manner.Digital signal processing module 210 will be stored in the spectrum signature array 425 about each the spectrum signature in compressor 104 and the pump 106.System diagnostics is handled 220 and is advanced to step 430 from step 420.
In step 430, when system 100 through its normal ice making cycle (that is precooling,, freeze, results and remove) during operation, digital signal processing module 210 is carried out FFT and is observed acoustic data.More specifically, digital signal processing module 210 analyzing and testing to sound wave 117 to produce its spectrum.Digital signal processing module 210 is stored in this spectrum in the spectrum array 432.System diagnostics is handled 220 and is advanced to step 435 from step 430.
In step 435, digital signal processing module 210 is considered the stage of ice making cycles, and whether compressor 104 or pump 106 should be energized.In other words, digital signal processing module 210 by means of with the communicating by letter of the miscellaneous part of system 100, understand compressor 104 or pump 106 and whether should be energized.If compressor 104 or pump 106 should not be energized, then system diagnostics is handled 220 and is circulated back to step 430.If compressor 104 or pump 106 should be energized, then system diagnostics is handled 220 and is advanced to step 440.
In step 440, digital signal processing module 210 confirms whether comprise the equipment that should be energized from the spectrum of step 430, i.e. the spectrum signature of compressor 104 or pump 106.For example, suppose that compressor 104 should be energized.Therefore, digital signal processing module 210 confirms whether spectrum array 432 comprises the spectrum signature of the compressor 104 of storage in the spectrum signature array 425.System diagnostics is handled 220 and is advanced to step 450 from step 440.
In step 450, if spectrum array 432 comprises the for example spectrum signature of the equipment that just is being considered of compressor 104, then digital signal processing module 210 inference systems 100 are just carrying out suitable operation, and therefore system diagnostics processing 220 is circulated back to step 430.If spectrum array 432 does not comprise the spectrum signature of the equipment that just is being considered, then digital signal processing module 210 inference systems 100 do not carry out suitable operation, and therefore system diagnostics processing 220 advances to step 460.
Still with reference to step 450, expect that spectrum signature array 425 comprises about each the spectrum signature in compressor 104 and the pump 106.Therefore, digital signal processing module 210 can confirm whether detected acoustical signal 117 comprises mechanical oscillation 105 and one of mechanical oscillation 107 or both.This also makes system diagnostics handle the 220 spectrum contributions that can distinguish from compressor 104 and pump 106, and whether definite compressor 104 open with one of pump 106 or both, and therefore diagnosing compressor 104 and one of pump 106 or both operations.In addition, digital signal processing module 210 even can comprise that carrying out these in noise or the situation from the contribution of the spectrum of other equipment in the system 100 confirms in detected acoustical signal 117.
In step 460,220 signals 165 that give the alarm are handled in system diagnostics.
Preceding text are described as digital signal processing module 210 to the following situation signal 165 that gives the alarm: the equipment that expection is considered will be opened, but spectrum array 432 does not comprise the spectrum signature of the equipment of being considered.Yet; System diagnostics is handled 220 and can be configured to, and digital signal processing module 210 signal 165 that in following situation, gives the alarm: expection equipment will be closed, and therefore; Spectrum should not comprise the spectrum signature of equipment, yet spectrum array 432 but still comprises the spectrum signature of this equipment.This situation possibly failed closing device or equipment in for example system 100 and is confined in the situation of its opening and take place.
Recall, system 100 comprises detector, and promptly sensor 110, and processor, and promptly processing module 145.Sensor 110 detect when water 103 just the structure in ice machine (being evaporimeter 102) go up when freezing sound wave 108 through water body (water 103) propagation, so produce detected sound wave 117.
Processing module 145: extract (a) its frequency components and (b) amplitude of this frequency component from detected sound wave 117; And when this amplitude surpasses threshold value, send signal, promptly signal 124, to remove water 103 from evaporimeter 102.
Detected sound wave 117 is time-domain signals.Processing module 145 is in order to extract frequency component and above-mentioned amplitude: this time-domain signal is transformed to frequency-region signal; And obtain frequency component and above-mentioned amplitude from this frequency-region signal.
In this external system 100, above-mentioned amplitude and its threshold value relatively can be regarded as first threshold, and therefore, processing module 145: also extract the harmonic wave of (a) frequency components and (b) amplitude of harmonic wave from detected sound wave 117; And when (i) above-mentioned amplitude surpasses first threshold and (ii) the amplitude of harmonic wave surpasses second threshold value, send signal 124 to relay 150.
Preceding text have been described system 100 in processing module 145 under situation about realizing on the control panel 130.Therefore, processing module 145 or any its parts, and especially, digital signal processing module 210 can be realized in hardware (for example, electronic circuit) or firmware or their combination.In addition, digital signal processing module 210 can realize in software, and with system 100 in the miscellaneous part computer of communicating by letter on move.
Fig. 5 is the block diagram of the computer implemented embodiment (it is called as 500 hereinafter) of digital signal processing module 210.System 500 comprises computer 505, and it comprises processor 515 and memory 520 successively.System 500 communicates by letter with the miscellaneous part in the system 100.
Processor 515 is electronic equipments by logic circuit configuration of response and execution command.
Memory 520 is the computer-readable mediums through computer program code.In this, memory 520 storage data and the instruction that can control the operation of processor 515 by processor 515 being used to of reading and carry out.Memory 520 can be realized in random-access memory (ram), hard disk, read-only storage (ROM), flash memory or their combination.One of parts of memory 520 are program modules 525.
, and therefore in software, realize that it also can be realized here although program module 525 is described as being installed in the memory 520 in any hardware (for example, electronic circuit), firmware, software or their combination.
The execution result of processor 515 output method described herein is for example based on the fault indicator of sending of alarm signal 165.Can be as an alternative, processor 515 can guide to the remote equipment (not shown) with output via the network (not shown).
Be loaded in the memory 520 although program module 525 is represented as, it also can be configured on the storage medium 535, is used for being loaded into subsequently memory 520.Storage medium 535 also is a computer-readable medium of storing program module 525 above that.The example of storage medium 535 comprises floppy disk, compact disk, tape, read-only storage, optical storage media, USB (USB) flash drive, digital multi-purpose CD or zip driver.Can be as an alternative, storage medium 535 can be to be positioned on the remote storage system and via the network (not shown) to be coupled to the random access memory of computer 505 or the electronic storage device of other types.
Technology described herein is exemplary, and should not be interpreted as and mean any special restriction of the present disclosure.It is various for choosing, combination and modification to should be understood that those skilled in the art can design.For example; System 100 can comprise a plurality of sensors 110 of the sound wave 108 of all places that is used to detect water 103; And the step that is associated with processing described herein can be carried out with any order; For example, step 435 can be reversed with 430 order, only if step itself indicates or stipulated order in addition.Moreover though sound wave 108 is described to derive from the mechanical oscillation of compressor 105 or pump 107 here, system 100 can comprise the equipment of specific use, and its generation is used for the specific vibration analyzed by processing module 145.The disclosure is intended to contain all such the replacing choosing, revise and change in the scope that falls into accompanying claims.
Term " comprises " or " comprising " will be interpreted as the existence that indicates characteristic, integral body, step or the parts narrated, but not gets rid of the existence of one or more other characteristics, integral body, step or parts or their group.
Claims (6)
1. the system of a sound wave of propagating through this water body when being used for analyzing water body and just freezing comprises:
Detector, it detects the sound wave of when water body just structurally freezes, propagating through said water body, therefore produces detected sound wave; And
Processor, its:
Extract a) frequency component and the b of said detected sound wave from said detected sound wave) amplitude of said frequency component; And
When said amplitude surpasses threshold value, send the signal that is used for removing said water body from said structure.
2. the system that is used for passing through when analyzing water body is just freezing the sound wave of this water body propagation according to claim 1,
Wherein, said detected sound wave is a time-domain signal, and
Wherein, in order to extract said frequency component and said amplitude, said processor:
Said time-domain signal is transformed into frequency-region signal; And
Obtain said frequency component and said amplitude from said frequency-region signal.
3. the system that is used for passing through when analyzing water body is just freezing the sound wave of this water body propagation according to claim 1,
Wherein, said threshold value is a first threshold, and
Wherein, said processor:
Also extract a) harmonic wave and the b of said frequency component from said detected sound wave) amplitude of said harmonic wave; And
As i) said amplitude surpasses said first threshold and sends said signal when ii) the amplitude of said harmonic wave surpasses second threshold value.
4. the system of a sound wave of propagating through this water body when being used for analyzing water body and just freezing comprises:
Detector, it detects the sound wave of when water body just freezes on the structure in ice machine, propagating through said water body, so produces detected sound wave; And
Processor, its:
Analyze said detected sound wave to produce the spectrum of said detected sound wave;
Confirm whether said spectrum comprises spectrum signature, therefore produce and confirm that result, wherein said spectrum signature occur when the equipment in the said ice machine is operated; And
Give the alarm based on said definite result.
5. the system that is used for passing through when analyzing water body is just freezing the sound wave of this water body propagation according to claim 4, wherein, if said definite result indicates said spectrum not comprise said spectrum signature, then said processor sends said alarm.
6. the system that is used for passing through when analyzing water body is just freezing the sound wave of this water body propagation according to claim 4,
Wherein, said detected sound wave is a time-domain signal, and
Wherein, in order to analyze said detected sound wave, said processor:
Said time-domain signal is transformed into frequency-region signal; And
Obtain said spectrum from said frequency-region signal.
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| US37004710P | 2010-08-02 | 2010-08-02 | |
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| CN2011200641110U Expired - Lifetime CN202182596U (en) | 2010-08-02 | 2011-03-10 | System of analyzing sound wave transmitting through water body in freezing |
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| CN102346169A (en) * | 2010-08-02 | 2012-02-08 | 曼尼托沃食品服务有限公司 | Analyzing an acoustic wave that has propagated through a body of water while the body of water is being frozen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SE541997C2 (en) * | 2016-01-13 | 2020-02-11 | Freezeguard Ab | Freeze detector for a pipe or a container |
| CN107281687B (en) * | 2017-08-22 | 2020-03-10 | 河海大学常州校区 | Fire hydrant water condition detection method |
| JP7138427B2 (en) * | 2017-11-09 | 2022-09-16 | 株式会社明治 | Solid-liquid distribution detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5627310A (en) * | 1992-12-10 | 1997-05-06 | Imi Cornelius, Inc. | Sensor arrangement for ice bank control |
| US6328467B1 (en) * | 1999-05-07 | 2001-12-11 | University Of Tennessee Research Corp. | Method and apparatus for detecting ice or frost deposition |
| US7296425B2 (en) * | 2005-04-01 | 2007-11-20 | Sunwell Engineering Co., Ltd. | Sensor assembly for detecting ice crystal formation on heat exchange surface and ice-making machine incorporating the same |
| BRPI0702369A2 (en) * | 2007-05-29 | 2009-01-20 | Whirlpool Sa | Diagnostic system and method by capturing mechanical waves in refrigeration and / or household appliances |
| CN102346169B (en) * | 2010-08-02 | 2015-01-07 | 曼尼托沃食品服务有限公司 | Analyzing an acoustic wave that has propagated through a body of water while the body of water is being frozen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102346169A (en) * | 2010-08-02 | 2012-02-08 | 曼尼托沃食品服务有限公司 | Analyzing an acoustic wave that has propagated through a body of water while the body of water is being frozen |
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| CN102346169A (en) | 2012-02-08 |
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