CN206147091U9 - Channel ultrasonic chromacoder - Google Patents
Channel ultrasonic chromacoder Download PDFInfo
- Publication number
- CN206147091U9 CN206147091U9 CN201621204267.3U CN201621204267U CN206147091U9 CN 206147091 U9 CN206147091 U9 CN 206147091U9 CN 201621204267 U CN201621204267 U CN 201621204267U CN 206147091 U9 CN206147091 U9 CN 206147091U9
- Authority
- CN
- China
- Prior art keywords
- electric capacity
- circuit
- cmut
- resistance
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model is related to field of signal processing, specifically a kind of channel ultrasonic chromacoder.Solve CMUT and be unable to matching problem with PMUT imaging system parameters,Realization makes full use of existing equipments resources,From the problem of secondary development,Including transmission signal modulate circuit,Impedance matching circuit,CMUT radiating circuits,CMUT receiving circuits,Receiving signal manages circuit and power module,Power module is respectively transmission signal modulate circuit,Impedance matching circuit,CMUT radiating circuits,CMUT receiving circuits and receiving signal reason circuit are powered,Transmission signal modulate circuit input receives signal,Transmission signal modulate circuit output end is connected with impedance matching circuit input,Impedance matching circuit output end is connected with CMUT radiating circuit inputs,CMUT receiving circuits perceive the echo-signal that CMUT launches by acoustic pressure,CMUT receiving circuits output end is connected with receiving signal reason circuit input end,Receiving signal manages circuit output end output signal.
Description
Technical field
The utility model is related to medical ultrasound imaging technology, industrial nondestructive testing technology and field of signal processing, specifically a kind of channel ultrasonic chromacoder.
Background technology
Ultrasonic imaging technique is widely used in the various fields such as medical science, military affairs, industry, agricultural, and ultrasonic transducer is one of the critical component for realizing ultrasonic imaging.In terms of medical science, because ultrasonic imaging has the advantage such as safe, noninvasive, portable, easy-to-use, cheap, the ultrasonic examination of 20 end of the centurys has occupied a quarter of all kinds of medical imaging modes, and ultrasonic imaging plays huge effect in clinical diagnosis field；In industrial aspect, ultrasonic non-destructive inspection techniques are a kind of detection techniques with the fastest developing speed, compared with other conventional Dynamic Non-Destruction Measurements, ultrasonic non-destructive inspection techniques have detection object scope wide, and detection depth is big, defect location is accurate, sensitivity is high, low cost, easy to use, speed is fast, harmless and the features such as be easy to onsite application；In terms of acoustic imaging, suibmarine mineral resources exploitation needs to carry out engineering survey and undersea surveillance, in maritime rights and interests demarcate negotiation, need the support of seafloor topography data, waterway dredging project is also required to topography and geomorphology measurement and quantities assessment, important water activity region, base, underwater facility and ship etc. need to take precautions against the attack of terrorism of small-sized latent device (such as midget submarine) and frogman, and acoustic imaging technology can be additionally used in the locating fish, offshore oil drilling, marine navigation, Underwater Engineering（Bank-protection works, underwater line etc.）Detect, immersed object salvage, underwater operation monitoring, archaeology, hydrographic survey etc. under water；In military aspect, acoustic imaging technology can be used for the detection of the underwater explosion thing such as submarine mine and the safety precaution of identification, base and naval vessels, terrain match navigation etc..
In numerous ultrasound transducer application fields, piezoelectric ultrasonic transducer（PMUT）It is the one kind being most widely used, is a kind of transducer being made using the piezo-electric effect of piezoelectric, piezoelectric ceramics is piezoelectric the most frequently used now.Due to being influenceed by factors such as piezoelectric, structure type, processing technologys so that traditional piezoelectric ultrasonic transducer exist acoustic impedance mismatch, many weak points such as working frequency is limited, smaller temperature range, complex manufacturing technology, yield rate is relatively low, uniformity is poor.With the fast development of ic manufacturing technology and micro-processing technology, the design of ultrasonic transducer, manufacture and process technology are also being continuously updated and are developing, and continue to bring out out various new manufactures and process technology.Capacitive micromachined ultrasonic transducer based on MEMS technology（CMUT）With the significant advantage not available for conventional piezoelectric ultrasonic transducer, both broadband and the advantage of receiving sensitivity high with capacitive transducer, also MEMS micro-processing technology is taken full advantage of to be adapted to make miniature high density arrays, the uniformity mass production high of array element is realized, is conducive to transducer integrated with signal processing circuit.It is expected to substitute main product of the conventional piezoelectric ultrasonic transducer as market.Because CMUT is different with the working mechanism of PMUT, working sensor parameter setting is inconsistent, therefore CMUT cannot be applied into PUMT imaging systems.Yet there are no the relevant report that CMUT is matched with PMUT imaging systems.Channel ultrasonic chromacoder of the present invention, the parameter needed for the emission parameter of PMUT systems is changed into CMUT by launching phase by signal limiter, pulse shaper, impedance matching circuit, realizes the perfect matching of CMUT and ultrasonic image-forming system；Receive the stage, when CMUT receives echo-signal by small capacitance detect circuit, signal filter circuit will detect electric capacity be converted to PUMT imaging systems needed for voltage signal, realize target object be imaged.
The content of the invention
The utility model is to be unable to matching problem to solve CMUT and PMUT imaging system parameters, and realization makes full use of existing equipments resources, from secondary development, there is provided a kind of channel ultrasonic chromacoder.
The utility model takes following technical scheme：A kind of channel ultrasonic chromacoder, including transmission signal modulate circuit, impedance matching circuit, CMUT radiating circuits, CMUT receiving circuits, receiving signal manages circuit and power module, power module is respectively transmission signal modulate circuit, impedance matching circuit, CMUT radiating circuits, CMUT receiving circuits and receiving signal reason circuit are powered, transmission signal modulate circuit input receives signal, transmission signal modulate circuit output end is connected with impedance matching circuit input, impedance matching circuit output end is connected with CMUT radiating circuit inputs, CMUT receiving circuits perceive the echo-signal that CMUT launches by acoustic pressure, CMUT receiving circuits output end is connected with receiving signal reason circuit input end, receiving signal manages circuit output end output signal.
Described transmission signal modulate circuit includes ultrasonic pulse shaping circuit and high-voltage alternating transformation amplitude limiter circuit based on Schmidt trigger.
Described receiving signal reason circuit includes that small capacitance detects amplifying circuit and bandwidth-limited circuit.
Described impedance matching circuit includes transformer, electric capacity C ', electric capacity C and resistance R, transformer input side is connected with power supply, transformer outlet side first port is connected with one end of electric capacity C ', the other end of electric capacity C ' is connected with one end of inductance L, the one end of the inductance L other ends respectively with electric capacity C, electric capacity C0 and resistance R is connected, and the other end of electric capacity C, electric capacity C0 and resistance R is connected with transformer outlet side second port.
Described small capacitance detection amplifying circuit includes resistance Rb, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity Cf, resistance Rf, resistance R1 and operational amplifier, resistance Rb one end is connected with power supply, the one end of the resistance Rb other ends respectively with electric capacity C1 and electric capacity C2 is connected, the other end ground wire of electric capacity C2, the other end of electric capacity C1 respectively with the reverse input end of operational amplifier, electric capacity C3, electric capacity Cf and resistance Rf is connected, electric capacity C3 other end ground wires, electric capacity Cf and the resistance Rf other ends are connected with the output end of operational amplifier, the one end of the output end in the same direction of operational amplifier respectively with electric capacity C4 and resistance R1 is connected, the other end ground wire of electric capacity C4 and resistance R1.
Compared with prior art, the utility model uses Thought of Structured Design, and visualizing man-machine interactive interface by PMUT imaging systems is operated.Signal limiter circuit, the ultrasonic pulse shaping circuit based on Schmidt trigger are devised, step-down shaping is carried out to PMUT imaging systems output high-voltage pulse, realize the driving to CMUT；Devise impedance matching circuit so that CMUT transmission powers reach maximum；Small capacitance is amplified based on OPA656 small capacitances detection circuit realiration and is converted to required voltage signal；The six rank bandpass filters based on AD8039 realize maximum attenuation -3dB in passband, minimum attenuation in stop band -30dB, CMUT itself are produced and from the noise filtering in complicated underwater acoustic channel, and voltage signal stabilization is exported.
Brief description of the drawings
Fig. 1 is general structure schematic diagram of the present utility model；
Fig. 2 is the utility model impedance matching circuit schematic diagram；
Fig. 3 is the utility model small capacitance detection amplification principle figure.
Specific embodiment
The specific embodiment of the invention is illustrated with reference to Fig. 1, the present invention includes transmission signal modulate circuit, impedance matching circuit, CMUT radiating circuits, CMUT receiving circuits, receiving signal manages circuit and power module, power module is respectively transmission signal modulate circuit, impedance matching circuit, CMUT radiating circuits, CMUT receiving circuits and receiving signal reason circuit are powered, transmission signal modulate circuit input receives signal, transmission signal modulate circuit output end is connected with impedance matching circuit input, impedance matching circuit output end is connected with CMUT radiating circuit inputs, CMUT receiving circuits perceive the echo-signal that CMUT launches by acoustic pressure, CMUT receiving circuits output end is connected with receiving signal reason circuit input end, receiving signal manages circuit output end output signal.
Described receiving signal reason circuit includes that small capacitance detects amplifying circuit and bandwidth-limited circuit.
Described transmission signal modulate circuit includes ultrasonic pulse shaping circuit and high-voltage alternating transformation amplitude limiter circuit based on Schmidt trigger.By CD40106 Schmidt trigger shapings, the impulse wave of amplitude stability is provided for CMUT, the circuit selects Texas
The CD40106 chips that Instruments companies release.CD40106 chips possess 6 Schmidt triggers, and each Schmidt has two critical voltages and possesses a delayed area, can prevent noise for the interference in circuit normal work.When suitable waveform signal is input into whole circuit, the signal of output is quivered between positive and negative saturation current, produces square wave or impulse wave output.
The parameter needed for by signal limiter, pulse shaper, impedance matching circuit be changed into the emission parameter of PMUT systems to drive CMUT by launching phase, realizes the perfect matching of CMUT and ultrasonic image-forming system；Receive the stage, when CMUT receives echo-signal, by small capacitance detect circuit, signal filter circuit will detect electric capacity be converted to PUMT imaging systems needed for voltage signal, realize target object be imaged.
Fig. 2 is impedance matching circuit schematic diagram, described impedance matching circuit includes transformer, electric capacity C ', electric capacity C and resistance R, transformer input side is connected with power supply, transformer outlet side first port is connected with one end of electric capacity C ', the other end of C ' is connected with one end of inductance L, the one end of the inductance L other ends respectively with electric capacity C, electric capacity C0 and resistance R is connected, and the other end of electric capacity C, electric capacity C0 and resistance R is connected with transformer outlet side second port.Solve the impedance mismatch problem of CMUT arrays and shaping circuit so that CMUT has operating efficiency higher.When load impedance and shaping circuit equiva lent impedance conjugate complex number each other, load output power is maximum, and CMUT conversion efficiencies are maximum.CMUT in resonant condition constitutes load equivalent to a capacitive reactances together with match circuit.There are series connection and two kinds of way of outputs in parallel for resonance matching circuit, employ series system, because when the timing of power output one, the equivalent resistance of series tuning are small, volume of transformer and weight can be mitigated, and series connection matching has filter action.
As shown in Figure 3, described small capacitance detection amplifying circuit includes resistance Rb, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity Cf, resistance Rf, resistance R1 and operational amplifier, resistance Rb one end is connected with power supply, the one end of the resistance Rb other ends respectively with electric capacity C1 and electric capacity C2 is connected, the other end ground wire of electric capacity C2, the other end of electric capacity C1 respectively with the reverse input end of operational amplifier, electric capacity C3, electric capacity Cf and resistance Rf is connected, electric capacity C3 other end ground wires, electric capacity Cf and the resistance Rf other ends are connected with the output end of operational amplifier, the one end of the output end in the same direction of operational amplifier respectively with electric capacity C4 and resistance R1 is connected, the other end ground wire of electric capacity C4 and resistance R1.Vcc is the DC offset voltage of CMUT, resistance R1 is balance resistance, electric capacity C1 is the equivalent model of CMUT, electric capacity C2, electric capacity C3 are respectively the equivalent stray capacitance of circuit, interference of the stray capacitance to detection signal can be reduced, but small capacitance detection circuit will not be worked, resistance Rf is feedback resistance, profound and negative feedbck is formed in circuit, CMUT low current signals under ultrasonication are converted into voltage signal output, the presence of compensating electric capacity Cf, can be with the self-oscillation in suppression circuit signal and smear phenomenon.Capacitive detection circuit based on electric charge amplification principle, one side circuit only carries out a discharge and recharge to measured capacitance, the measurement to electric capacity can be completed, because measurement result does not exist ripple component, the influence of stray capacitance can preferably be suppressed, there is linear and stability well, which greatly enhances the collecting efficiency of data collecting system.
Texas is selected in small capacitance detects amplifying circuit and bandwidth-limited circuit
TPS7A4901 the and TPS7A3001 chips that Instruments companies release export galvanic current pressure as feeder ear.TPS7A4901 and TPS7A3001 chip noises are relatively low, and suppression ripple ability is stronger, and the required DC voltage of output can be stablized by adjusting peripheral circuit, used for signal shaping, impedance matching circuit, bandpass filter and small capacitance tesing and switching circuit.
Bandwidth-limited circuit uses the unlimited gain bandwidth-limited circuit of six rank tandem types, effectively filters out CMUT devices self-noise and from noise in underwater acoustic channel, realizes the stabilization output of signal.Maximum attenuation -3dB in passband, minimum attenuation in stop band -30dB, from the AD8039 chips of AnalogDevices companies, AD8039 amplifiers are high speed voltage feedback type amplifiers to the circuit, with extremely low quiescent current, each amplifier only 1.0 mA.The amplifier is not only low in energy consumption, low cost, and overall performance is also very outstanding.Additionally, it also has high pressure Slew Rate (425 V/ μ s) and low input offset voltage（3 mV of maximum）Characteristic.
Certainly; described above is not to limitation of the present utility model; the utility model is also not limited to the example above, change, remodeling, addition or replacement that those skilled in the art are made in essential scope of the invention, should also belong to protection domain of the present utility model.
Claims (5)
1. a kind of channel ultrasonic chromacoder, it is characterised in that：Including transmission signal modulate circuit, impedance matching circuit, CMUT radiating circuits, CMUT receiving circuits, receiving signal manages circuit and power module, power module is respectively transmission signal modulate circuit, impedance matching circuit, CMUT radiating circuits, CMUT receiving circuits and receiving signal reason circuit are powered, transmission signal modulate circuit input receives signal, transmission signal modulate circuit output end is connected with impedance matching circuit input, impedance matching circuit output end is connected with CMUT radiating circuit inputs, CMUT receiving circuits perceive the echo-signal that CMUT launches by acoustic pressure, CMUT receiving circuits output end is connected with receiving signal reason circuit input end, receiving signal manages circuit output end output signal.
2. channel ultrasonic chromacoder according to claim 1, it is characterised in that：Described transmission signal modulate circuit includes ultrasonic pulse shaping circuit and high-voltage alternating transformation amplitude limiter circuit based on Schmidt trigger.
3. channel ultrasonic chromacoder according to claim 2, it is characterised in that：Described receiving signal reason circuit includes that small capacitance detects amplifying circuit and bandwidth-limited circuit.
4. channel ultrasonic chromacoder according to claim 3, it is characterised in that：Described impedance matching circuit includes transformer, electric capacity C ', electric capacity C and resistance R, transformer input side is connected with power supply, transformer outlet side first port is connected with one end of electric capacity C ', the other end of electric capacity C ' is connected with one end of inductance L, the one end of the inductance L other ends respectively with electric capacity C, electric capacity C0 and resistance R is connected, and the other end of electric capacity C, electric capacity C0 and resistance R is connected with transformer outlet side second port.
5. channel ultrasonic chromacoder according to claim 4, it is characterised in that：Described small capacitance detection amplifying circuit includes resistance Rb, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity Cf, resistance Rf, resistance R1 and operational amplifier, resistance Rb one end is connected with power supply, the one end of the resistance Rb other ends respectively with electric capacity C1 and electric capacity C2 is connected, the other end ground wire of electric capacity C2, the other end of electric capacity C1 respectively with the reverse input end of operational amplifier, electric capacity C3, electric capacity Cf and resistance Rf is connected, electric capacity C3 other end ground wires, electric capacity Cf and the resistance Rf other ends are connected with the output end of operational amplifier, the one end of the output end in the same direction of operational amplifier respectively with electric capacity C4 and resistance R1 is connected, the other end ground wire of electric capacity C4 and resistance R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621204267.3U CN206147091U9 (en) | 2016-11-08 | 2016-11-08 | Channel ultrasonic chromacoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621204267.3U CN206147091U9 (en) | 2016-11-08 | 2016-11-08 | Channel ultrasonic chromacoder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN206147091U CN206147091U (en) | 2017-05-03 |
| CN206147091U9 true CN206147091U9 (en) | 2017-07-07 |
Family
ID=58625367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621204267.3U Active CN206147091U9 (en) | 2016-11-08 | 2016-11-08 | Channel ultrasonic chromacoder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206147091U9 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107356850B (en) * | 2017-06-12 | 2020-06-09 | 中国航空工业集团公司西安飞行自动控制研究所 | Solution method for self-oscillation of alternating current signal processing circuit |
| EP4222735A1 (en) * | 2020-10-02 | 2023-08-09 | The University of British Columbia | Contactless cmut operation |
-
2016
- 2016-11-08 CN CN201621204267.3U patent/CN206147091U9/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN206147091U (en) | 2017-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7670290B2 (en) | Electric circuit for tuning a capacitive electrostatic transducer | |
| JP2014183589A (en) | Acoustic lens for micromachined ultrasound transducer | |
| CN206147091U9 (en) | Channel ultrasonic chromacoder | |
| CN103292160A (en) | Ultrasonic detection device and method for pipeline leakage | |
| CN102364336A (en) | Ultrasonic wave sensor for pile supersonic wave detection | |
| CN110461214A (en) | Measure the property in body | |
| CN102210593A (en) | Digital pulsed ultrasound transmitting device for fetal monitor | |
| CN103399299A (en) | Underwater broadband general type responder | |
| GB2442026A (en) | A pressure-balanced electromechanical converter | |
| CN202661448U (en) | Arbitrary waveform excitation board card for exciting piezoelectric transducer array to generate ultrasonic guided waves | |
| RU88237U1 (en) | COMBINED HYDROACOUSTIC RECEIVER | |
| Gao et al. | Design of polymer-based PMUT array for multi-frequency ultrasound imaging | |
| WO2006088708A2 (en) | Multi-layer gas matrix piezoelectric composite transducer | |
| CN102565200A (en) | Arbitrary waveform excitation board card for exciting piezoelectric transducer array to generate ultrasonic guided waves | |
| CN109283251B (en) | Signal processing circuit of well wall imaging ultrasonic phased array | |
| CN202654158U (en) | Digital pulse-type ultrasonic transmitting device used for fetal monitor | |
| CN102121986A (en) | Bionic sonar capsule | |
| CN115508452A (en) | Piezoelectric acoustic emission sensor | |
| CN210038148U (en) | Signal acquisition protector of underwater acoustic receiving and transmitting combined energy replacing device | |
| US11883844B2 (en) | Multi-frequency wireless sensor | |
| CN203705400U (en) | Grounding grid corrosion detection system | |
| CN111030319A (en) | Underwater non-contact wireless energy transmission system based on ultrasonic waves | |
| CN206638820U (en) | A kind of binary channels supersonic range finder | |
| GB2566438A (en) | Wireless sensor | |
| CN210037723U (en) | CMUT signal conversion circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model patent | ||
| CU01 | Correction of utility model patent |
Correction item: Denomination of Invention Correct: Multichannel ultrasonic signal conversion device False: Multi-channel ultrasonic signal conversion Number: 18 Page: full text Volume: 33 |
|
| CU03 | Correction of utility model patent gazette | ||
| CU03 | Correction of utility model patent gazette |
Correction item: Denomination of Invention Correct: Multichannel ultrasonic signal conversion device False: Multi-channel ultrasonic signal conversion Number: 18 Volume: 33 |