CN103217483A - Transformer coupling method of ultrasonic transmitter circuit and single-power-supply amplifier - Google Patents
Transformer coupling method of ultrasonic transmitter circuit and single-power-supply amplifier Download PDFInfo
- Publication number
- CN103217483A CN103217483A CN2013100445674A CN201310044567A CN103217483A CN 103217483 A CN103217483 A CN 103217483A CN 2013100445674 A CN2013100445674 A CN 2013100445674A CN 201310044567 A CN201310044567 A CN 201310044567A CN 103217483 A CN103217483 A CN 103217483A
- Authority
- CN
- China
- Prior art keywords
- amplifier
- circuit
- transformer
- power
- transmitter circuit
- 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.)
- Pending
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Amplifiers (AREA)
Abstract
The invention relates to a transformer coupling method of an ultrasonic transmitter circuit and a single-power-supply amplifier. The invention provides an improvement upon a signal inputting manner in an ultrasonic flaw detector. A coupling transformer is used for carrying out a coupling treatment upon signals at a signal input end such that two differential signals with same value and opposite polarities are produced. Therefore, circuit is simplified, power consumption is reduced, anti-interference capacity is improved, and signal-to-noise ratio is improved.
Description
Technical field
The present invention relates to the coupling process between the ultrasonic transmit circuit and amplifier in the Ultrasonic Nondestructive field, particularly ultra-sonic defect detector.
Technical background
In Ultrasonic Nondestructive, adopt the ultrasonic sensor of piezoelectric or probe to need very high pulse voltage excitation to produce ultrasound wave.The DC operation level of ultrasonic transmit circuit is in zero level usually, usually adopt direct coupling system between ultrasonic transmit circuit and the analogue amplifier, for the incoming level that guarantees amplifier consistent with the acoustic emission circuit, amplifier must adopt the negative and positive dual power power supply of symmetry, cause the amplifying circuit power consumption big, the feed circuit complexity of power supply.
Variable gain amplifier AD603 with ADI company is an example, ± the 5V power supply, under the 20mA current condition, each amplifier needs 200mW, ± the 12V power supply, under the 20mA current condition, each amplifier needs 480mW.The AFE (analog front end) of a ultra-sonic defect detector needs 3 grades of amplifiers usually, and corresponding power consumption is respectively 600mW and 1440mW.If consider the efficient of power supply, so, power consumption is bigger.
Summary of the invention
The amplifier power consumption that exists at above-mentioned directional coupling method is big, needs the positive-negative power supply problem, and the present invention proposes a kind of transformer coupled method, can solve the problems referred to above.
Echoed signal from probe inserts the elementary of transformer by resistance, and the differential input end of amplifier is received in the output of transformer, and secondary centre tap provides the common mode voltage of power supply.If amplifier provides internal common mode voltage for differential input end, then secondary centre tap also can be cancelled.
With the another kind of variable gain amplifier AD8331 of ADI company is example ,+the 5V single supply, under the 25mA current condition, each amplifier needs 125mW.The AFE (analog front end) of a ultra-sonic defect detector needs 3 grades of amplifiers usually, and corresponding power consumption is respectively 450mW.
Because transformer has been realized the isolation of acoustic emission circuit and amplifier, therefore, the direct-current working volts at transformer two ends can difference, makes amplifier can adopt low-power consumption, single supply amplifier cheaply.Transformer-coupled buffer action also helps the design of printed board, improves the noise robustness of system.
Description of drawings
The direct-coupled circuit that Fig. 1 is traditional
The transformer-coupled circuit that Fig. 2 the present invention proposes
(T1 is exactly a coupling transformer of the present invention to Fig. 3 specific implementation schematic diagram of the present invention among the figure; AD8331 is a variable gain amplifier, and wherein GAIN is input as magnitude of voltage, is used for adjusting the enlargement factor of AD8331; Position, frame 1 the inside voltage conversion circuit is the required magnitude of voltage of AD8331 with the 5V voltage transitions of importing)
Specific implementation method
The step that coupling transformer is coupled to signal among the present invention:
Step 1: piezoelectric chip produces ultrasonic signal, and echoed signal is introduced by S0, S1, enters switching selector through resistance;
Step 2: according to the path of signal input, the circuit that selection will insert is sent into coupling transformer;
Step 3: coupling transformer is coupled to signal, and identical, the opposite polarity differential signal of output two-way numerical value through the full wave bridge rectifier rectification, is sent into differential amplifier circuit;
Step 4: the single line road is as standby output terminal in the middle of the coupling transformer output terminal, and when differential amplifier can't carry out common mode output, but line attachment produces common-mode signal output, and circuit is run well.
Claims (1)
1. the present invention proposes the transformer coupled method of a kind of ultrasound emission circuit and single supply amplifier, it is characterized in that ultrasonic sensor (probe) is operated in zero level, amplifier adopts single power supply, adopts transformer coupled realization level conversion between sonic wave transmitting circuit and the amplifier.The present invention makes amplifier can adopt single power supply, has reduced power consumption, has simplified amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100445674A CN103217483A (en) | 2013-02-05 | 2013-02-05 | Transformer coupling method of ultrasonic transmitter circuit and single-power-supply amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100445674A CN103217483A (en) | 2013-02-05 | 2013-02-05 | Transformer coupling method of ultrasonic transmitter circuit and single-power-supply amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103217483A true CN103217483A (en) | 2013-07-24 |
Family
ID=48815463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100445674A Pending CN103217483A (en) | 2013-02-05 | 2013-02-05 | Transformer coupling method of ultrasonic transmitter circuit and single-power-supply amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103217483A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4984465A (en) * | 1989-12-04 | 1991-01-15 | General Electric Company | Ultrasound imaging system with common-mode noise rejection probe |
| CN101698121A (en) * | 2009-10-23 | 2010-04-28 | 西安交通大学 | Conformal ultrasonic system for enforcing medicaments to permeate blood brain barrier |
| CN201869189U (en) * | 2010-11-17 | 2011-06-15 | 武汉大学 | Underwater wireless acoustic sensor network node ultrasonic transmission circuit based on DDS (Direct Digital Synthesis) technology |
| CN102661998A (en) * | 2012-05-30 | 2012-09-12 | 天津工业大学 | Electromagnetic acoustic emission nondestructive detection method of metal thin board and device thereof |
-
2013
- 2013-02-05 CN CN2013100445674A patent/CN103217483A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4984465A (en) * | 1989-12-04 | 1991-01-15 | General Electric Company | Ultrasound imaging system with common-mode noise rejection probe |
| CN101698121A (en) * | 2009-10-23 | 2010-04-28 | 西安交通大学 | Conformal ultrasonic system for enforcing medicaments to permeate blood brain barrier |
| CN201869189U (en) * | 2010-11-17 | 2011-06-15 | 武汉大学 | Underwater wireless acoustic sensor network node ultrasonic transmission circuit based on DDS (Direct Digital Synthesis) technology |
| CN102661998A (en) * | 2012-05-30 | 2012-09-12 | 天津工业大学 | Electromagnetic acoustic emission nondestructive detection method of metal thin board and device thereof |
Non-Patent Citations (1)
| Title |
|---|
| 孟祥顺等: "单电源型线性运放静态工作点的分析", 《电子科技》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104043577B (en) | A kind of digital intelligent formula ultrasonic power source and using method thereof | |
| CN103858395B (en) | Signal circuit | |
| CN201229172Y (en) | Electromagnetical supersonic transducer for detecting ferromagnetic pipe | |
| CN103567134A (en) | Matching device and matching method for ultrasonic power supply | |
| US8222794B2 (en) | Ultrasonic atomization circuit and an atomization device using the same | |
| CN105897251A (en) | Digital signal isolator and isolation method | |
| CN111486911B (en) | STM 32-based low-power-consumption gas ultrasonic flowmeter system | |
| CN109347451B (en) | Power amplifier for improving ultrasonic guided wave signal energy | |
| CN102508287B (en) | Underwater object detection device | |
| CN102288234A (en) | Electromagnetic flow meter | |
| CN202229762U (en) | Laser gyro digital machine shaking control circuit | |
| CN100589325C (en) | A differential signal interface circuit | |
| CN213843115U (en) | Ultrasonic wave transmitting and receiving circuit based on attenuation method | |
| CN103217483A (en) | Transformer coupling method of ultrasonic transmitter circuit and single-power-supply amplifier | |
| CN113325086A (en) | Detection system based on electromagnet type electromagnetic acoustic transducer | |
| CN103257944B (en) | Method and device for long-distance transmissions usb signal | |
| CN201322867Y (en) | Distributed joint control circuit of anthropomorphic robot | |
| CN211235664U (en) | Air coupling ultrasonic wave lamination wood board quality detection device | |
| CN103684024B (en) | The inverter of a kind of times of streaming difference output | |
| CN208675209U (en) | High-power high-efficiency sonar transmitter | |
| CN106911984B (en) | Sound sensing circuit based on operational amplifier | |
| CN213688508U (en) | Ultrasonic flowmeter | |
| CN110346003B (en) | Signal excitation and acquisition circuit of gas ultrasonic flowmeter | |
| CN101609120B (en) | Intelligent power supply for detecting solenoid valve | |
| CN106100682A (en) | Single channel, multiple signals isolation transmission system and full duplex communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Nanjing Xianengda Electronic Technology Co., Ltd. Document name: Notification of Passing Preliminary Examination of the Application for Invention |
|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Nanjing Xianengda Electronic Technology Co., Ltd. Document name: Notification that Application Deemed to be Withdrawn |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130724 |