CN2662262Y - Coil energy release circuit for single coil pulsed nuclear magnetic resonance system - Google Patents
Coil energy release circuit for single coil pulsed nuclear magnetic resonance system Download PDFInfo
- Publication number
- CN2662262Y CN2662262Y CN 200320124689 CN200320124689U CN2662262Y CN 2662262 Y CN2662262 Y CN 2662262Y CN 200320124689 CN200320124689 CN 200320124689 CN 200320124689 U CN200320124689 U CN 200320124689U CN 2662262 Y CN2662262 Y CN 2662262Y
- Authority
- CN
- China
- Prior art keywords
- coil
- magnetic resonance
- nuclear magnetic
- energy
- resistance
- 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.)
- Expired - Fee Related
Links
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The utility model relates to a coil energy-releasing circuit for a monocoil pulse-type Nuclear Magnetic Resonance (NMR) system, comprising a consuming resistance, a transmitter block, a receiver block and a portion of coils. The consuming resistance is directly connected with the transmitter block, while the receiver block is partially connected with the portion of coils; the consuming resistance is for the purpose of releasing the energy stagnated in the coils. The utility model has the advantages of having fair simple structure, facilitating to debug, operate and design of the integrated system.
Description
Technical field
The coil energy that the utility model relates to a kind of unicoil pulsed nuclear magnetic resonance system discharges circuit.
Background technology
The course of work of existing unicoil pulsed nuclear magnetic resonance system comprises: transmitter module transfers the energy to the dispose procedure of energy in the emission process, coil of coil and receiver module receives nmr echo signal by coil receiving course.Wherein the dispose procedure of coil energy is realized by energy release circuit.Energy release circuit generally comprises field effect transistor, the control circuit of control field effect transistor break-make and power consumption resistance.Its structure is that the drain electrode of field effect transistor directly links to each other with coiler part, and source electrode links to each other with power consumption resistance, the other end ground connection of power consumption resistance, and grid is connected with the field effect transistor control circuit.When field effect management and control system circuit made the field effect transistor conducting, drain electrode, source electrode and the power consumption resistance of energy by field effect transistor that emission process is trapped in the coil discharged.Though this method is reliable, increased the electronic components such as control circuit that field effect transistor and control field effect transistor are cut-off in the circuit, make complex system.Simultaneously, the system of returning of cut-offfing of field effect transistor brings rank to get over distortion.
The utility model content
In order to simplify circuit structure, the utility model provides a kind of coil energy of the unicoil NMR system that field effect transistor cut-offs control that do not need to discharge circuit.
The utility model is made up of power consumption resistance, transmitter module, receiver module and coiler part, and power consumption resistance directly links to each other with transmitter module, receiver module and coiler part.When transmitter module was worked, transmitter current flowed to coiler part, and the resistance that at this moment consumes energy is in parallel with receiver module, because coiler part is in the series resonance state, so the impedance minimum is the main flowing through coil part of transmitter current; When transmitter module quit work, the energy that is trapped in the coil mainly discharged energy by power consumption resistance; When receiving nmr echo signal, inductance, capacitance group before the receiver become series resonant circuit, the impedance loop minimum, and this branch road so the echoed signal electric current is mainly flowed through, receiver receives and amplifies the voltage at electric capacity two ends, the echoed signal that obtains amplifying.
The beneficial effects of the utility model are that the control circuit that has removed field effect transistor and needed the control field effect transistor to cut-off is simplified circuit structure greatly, is more convenient for debugging, implements and makes.
Description of drawings
Accompanying drawing is the synoptic diagram of the utility model embodiment.
Among the figure: 1. coiler part, 2. transmitter module, the 3. reverse interconnected diode in the transmitter module, 4. receiver module, the 5. reverse interconnected diode in the receiver module, 6. power consumption resistance R.
Wherein: D1, D2; D3, D4 are reverse interconnected diode, and C1, C2 are electric capacity, and C3 is a tunable capacitor, and L1 is the unicoil of unicoil NMR system, and L2 is an inductance.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described.
As shown in the figure, coiler part 1 is connected in series by L1 and C1 and constitutes, the end ground connection of L1.In the transmitter module 2: diode D1 and D2 are oppositely interconnected, are connected between C1 and the transmitter.In the receiver module 4: inductance L 2 one ends are connected with C1, and the other end is connected with the front end of receiver.Diode D3 and D4 are oppositely interconnected, are connected between the front end and ground of receiver.The end of capacitor C 2 and tunable capacitor C3 links to each other with the front end of receiver, other end ground connection.One end of power consumption resistance R simultaneously with coiler part 1 in capacitor C 1, reverse interconnected diode D1, D2 in the transmitter module 2 and the inductance L 2 in the receiver module 4 link to each other other end ground connection.
Principle of work of the present utility model and process: the transmitter module 2 of system, receiver module 4 and power consumption resistance R directly link to each other with coiler part 1.The power consumption resistance R resistance according to the monocoil situation of system between 10-40 Ω.When transmitter module 2 work, coiler part 1 is in the series resonance state, the impedance minimum, and transmitter current mainly flows through coiler part 1; When transmitter module 2 quit work, the remaining received energy that is trapped in coiler part 1 mainly released energy by the path of power consumption resistance R and inductance L 2 and reverse interconnected diode 5 compositions; When receiving nmr echo signal, reverse interconnected diode 5 in the receiver module ends, and L2 and C2, C3 constitute series resonant circuit, and nmr echo signal mainly passes through this path, receiver receives and amplifies the voltage at C2, C3 two ends, the echoed signal that obtains amplifying.
The utility model is applied to the coil energy dispose procedure of unicoil pulsed nuclear magnetic resonance system, and the simplification greatly of circuit structure makes system implementation and operation easier.
Claims (3)
1, the coil energy of a kind of unicoil pulsed nuclear magnetic resonance system discharges circuit, comprise coiler part, transmitter module and receiver module, the resistance [6] that it is characterized in that consuming energy directly links to each other with coiler part [1], transmitter module [2] and the receiver module [3] of NMR system.
2, the coil energy of unicoil NMR system according to claim 1 discharges circuit, it is characterized in that receiver amplifies the voltage at electric capacity (C2), (C3) two ends, the series resonant circuit that inductance (L1), electric capacity (C1) are formed is connected with power consumption resistance (R), power consumption resistance (R) end ground connection, the other end links to each other with electric capacity (C1) in the series resonant circuit, the other end of electric capacity (C1) links to each other with inductance (L1), the other end ground connection of inductance (L1).
3, the coil energy of unicoil pulsed nuclear magnetic resonance according to claim 1 system discharges circuit, it is characterized in that consuming energy resistance (R) resistance between 10-40 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320124689 CN2662262Y (en) | 2003-12-01 | 2003-12-01 | Coil energy release circuit for single coil pulsed nuclear magnetic resonance system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320124689 CN2662262Y (en) | 2003-12-01 | 2003-12-01 | Coil energy release circuit for single coil pulsed nuclear magnetic resonance system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2662262Y true CN2662262Y (en) | 2004-12-08 |
Family
ID=34349074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320124689 Expired - Fee Related CN2662262Y (en) | 2003-12-01 | 2003-12-01 | Coil energy release circuit for single coil pulsed nuclear magnetic resonance system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2662262Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865983A (en) * | 2009-04-17 | 2010-10-20 | 任朝辉 | Nuclear magnetic resonance assembly for releasing Ring Down signal by inductive coupling |
| CN101498772B (en) * | 2008-01-29 | 2012-07-18 | 西门子（中国）有限公司 | Identification code circuit of receiving coil in magnetic resonance imaging system |
-
2003
- 2003-12-01 CN CN 200320124689 patent/CN2662262Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498772B (en) * | 2008-01-29 | 2012-07-18 | 西门子（中国）有限公司 | Identification code circuit of receiving coil in magnetic resonance imaging system |
| CN101865983A (en) * | 2009-04-17 | 2010-10-20 | 任朝辉 | Nuclear magnetic resonance assembly for releasing Ring Down signal by inductive coupling |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2864697Y (en) | Voltage isolation sampling device | |
| CN2662262Y (en) | Coil energy release circuit for single coil pulsed nuclear magnetic resonance system | |
| CN201541361U (en) | Peak current control circuit, booster circuit and LED driver | |
| CN207283501U (en) | A kind of inverse E class power amplification circuits | |
| CN207304498U (en) | A kind of inverse E class power amplification circuits | |
| CN2779725Y (en) | Vehicle load electric control switch having short circuit predetection | |
| CN201113797Y (en) | High end driver circuit | |
| CN105649846A (en) | Electronic current-limiting relay for starting and stopping starter | |
| CN201016412Y (en) | Magnetic valve control circuit for air-jet loom | |
| CN208569004U (en) | A kind of power battery voltage isolation detection circuit | |
| CN202351637U (en) | Direct current (DC) power supply on-off control circuit | |
| CN208460009U (en) | A kind of data acquisition parsing plate and data collector adapting to industrial flow meter | |
| CN112803725A (en) | Low-side load driving circuit with open circuit diagnosis function | |
| CN201699583U (en) | Topological structure of voltage boosting and reducing chopper circuit | |
| CN208707993U (en) | A kind of driving circuit for automobile lamp list lamp | |
| CN205648118U (en) | Regard as power supply's LED light in order to discard dry battery | |
| CN201219234Y (en) | Resonance driving module with dynamic power supply | |
| CN205478063U (en) | A electronic type current limiting relay for opening starter stops | |
| CN203681753U (en) | Electronic control system of battery main switch for motorized tricycle | |
| CN205752971U (en) | Ultrashort laser pulse generating means for anti-collision system for automobile | |
| CN103795400B (en) | High-precision sampling circuit based on VICOR module | |
| CN2651057Y (en) | Automatic protective capacitance flash relay | |
| CN201813371U (en) | Optical transmitting end low-power-consumption driving circuit in electronic transformer optical fiber transmission | |
| CN219938328U (en) | Switching circuit and electronic equipment | |
| CN202737732U (en) | Zero-voltage switching system of high-power switching tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |