CN203849435U - Weak signal detection platform for detecting nuclear magnetic resonance water detector - Google Patents
Weak signal detection platform for detecting nuclear magnetic resonance water detector Download PDFInfo
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- CN203849435U CN203849435U CN201420156333.9U CN201420156333U CN203849435U CN 203849435 U CN203849435 U CN 203849435U CN 201420156333 U CN201420156333 U CN 201420156333U CN 203849435 U CN203849435 U CN 203849435U
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Abstract
The utility model relates to a weak signal detection platform for detecting a nuclear magnetic resonance water detector. A signal generating device emits an emission signal to an emission coil through an emission port. The signal generating device emits an emission signal to the emission coil through the emission port. The emission coil and a receiving coil are arranged in parallel and coaxially, which constitute an electromagnetic coupling inductor. AC electric signals in the emission coil generate an alternate magnetic field, and an induced voltage is generated in the receiving coil through electromagnetic field space induction and a way of coil coupling, hence weak signals required by the detector are obtained. The receiving coil transmits a tiny voltage generated by coupling to a receiving apparatus through a receiving port. A controller is connected with a motion structure, for further controlling the receiving coil and controlling accurate space position between the emission coil and the receiving coil. According to the weak signal detection platform provided by the utility model, each parameter of the apparatus is assessed and correction is performed with standard values. Time for field operation and apparatus detection is saved, and a platform which is more stable and is good in repeatability is provided for repairing and improving the apparatus.
Description
Technical field
The utility model relates to a kind of Detection of Weak Signals platform, is especially applied to detect nuclear magnetic resonance water detection instrument detection system equipment whether working properly under indoor environment.
Background technology
Development along with microelectric technique, computer technology and information theory, the detection of feeble signal is all very important in a lot of fields, any signal all comprises noise, and when noise is very strong, it is again very crucial how effectively extracting this feeble signal in modern signal processing.The widespread use of feeble signal impels people constantly to study new theory, the new method of Detection of Weak Signals, detects the weak useful signal of being flooded by noise.
The Wavelet Analysis Theory that Weak characteristic signal detecting method gets up to newly-developed from traditional spectrum analysis, coherent detection, Sampling Integral and time domain average, neural network, high-order statistic, the methods such as accidental resonance, in Weak characteristic input, be all widely used, but the feeble signal that the inapplicable detection of traditional method is very little, is not suitable for being applied to nuclear magnetic resonance water detection instrument and detects.The utility model has related to a kind of Detection of Weak Signals platform, the mode being coupled by electromagnetic induction obtains the signal very faint, accurate, consistance is higher, whether working properly for detection of nuclear magnetic resonance water detection instrument, to the parameters of experimental apparatus and with standard value, proofread and correct, save the time of field operation and detecting instrument, and provide more stable, a reproducible platform to repairing and improve instrument.
Utility model content
Whether technical problem to be solved in the utility model is to provide a kind of nuclear magnetic resonance water detection instrument that detects, to obtain tiny signal accurately under noise circumstance, detect whereby nuclear magnetic resonance apparatus and can normally work.
The utility model is achieved in that a kind of Detection of Weak Signals platform that detects nuclear magnetic resonance water detection instrument, and this platform comprises:
The transmitting coil that parallel coaxial arranges and receiving coil form electromagnetic coupler;
Signal generation apparatus, is connected with transmitting coil by transmitting terminal interface, by transmitting coil, launches the frequency signal identical with the Larmor frequency in tested region;
Receiving trap, is connected with receiving coil by receiving end interface, and receiving trap receives induced signal by receiving coil and shows;
Motion structure, the lower end of receiving coil is arranged on motion structure, and motion structure is controlled the distance driving between receiving coil adjustment and transmitting coil by a controller;
Described controller input signal generating means send the peak-to-peak value voltage of signal, detect the coil turn of the peak-to-peak value voltage of the required tiny signal of nuclear magnetic resonance water detection instrument, transmitting coil and receiving coil and selection and signal generation apparatus in the identical waveform that transmits show.
Further, described controller comprises stepper motor, the output terminal of stepper motor is connected with motion structure, the input end of stepper motor connects one drive circuit, driving circuit is connected by data line with a slave computer processor I, the output terminal of slave computer processor I also connects the screen for display waveform, and the input end of slave computer processor I is also connected with button I, for parameters.
Further, described signal generation apparatus comprises slave computer processor II, slave computer processor II connects transmitting coil by D/A converter, amplifier I, amplifilter successively, slave computer processor II is connected with wave memorizer, for stored waveform database, slave computer processor II connects a button II, and slave computer processor II connects a display by data line.
Further, described receiving trap receives the signal of receiving coil, and receiving coil signal is connected with host computer with receiving end, prime amplifier, amplifier II, capture card through receiving port successively.
The utility model compared with prior art, beneficial effect is: the transmitting coil that the utility model application is loaded with certain frequency exchange current produces magnetic field, and make receiving coil produce induced voltage by external electromagnetic field coupling scheme, by corresponding controller, regulate the distance between transmitting coil and receiving coil, to obtain testing required feeble signal, whether be working properlyly convenient to detect in the short period of time nuclear magnetic resonance water detection instrument, shortened the nuclear magnetic resonance water detection required time of instrument of detecting, for nuclear magnetic resonance water detection instrument provides one to stablize, reliable detection platform.
Accompanying drawing explanation
Fig. 1 is the platform structure schematic diagram that the utility model embodiment provides;
Fig. 2 is the structured flowchart of the controller that provides of the utility model embodiment;
Fig. 3 is the structured flowchart of the signal generation apparatus that provides of the utility model embodiment;
Fig. 4 is the structured flowchart of the receiving trap that provides of the utility model embodiment;
1 transmitting coil, 2 receiving coils, 3 signal generation apparatus, 4 motion structures, 5 controllers, 6 receiving traps, 7 stepper motors, 8 driving circuits, 9 slave computer processor I, 10 screens, 11 button I, 12 amplifier I, 13D/A converter, 14 slave computer processor II, 15 wave memorizers, 16 button II, 17 displays, 18 receiving ends, 19 prime amplifiers, 20 amplifier II, 21 capture cards, 22 host computers.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of Detection of Weak Signals platform that detects nuclear magnetic resonance water detection instrument, this platform comprises: the transmitting coil 1 that parallel coaxial arranges forms electromagnetic coupler with receiving coil 2; Signal generation apparatus 3, is connected with transmitting coil 1 by transmitting terminal interface; Receiving trap 6, is connected with receiving coil 2 by receiving end interface; Motion structure 4, the lower end of receiving coil 2 is arranged on motion structure 4, and motion structure 4 is controlled the distance driving between receiving coil 2 adjustment and transmitting coil 1 by a controller 5.Motion structure 4 can be gear & rack structure.
Signal generation apparatus 3 is launched a signal to transmitting coil 1 by emission port, transmitting can be both the sinusoidal signal that nuclear magnetic resonance water detection instrument detects needed free induction decay, can be again the sinusoidal signal of certain frequency, the Larmor frequency that the frequency of its signal is tested region.Transmitting coil 1 is as follows with the major parameter of receiving coil 2: diameter is 30cm, and coil turn scope is between 20 to 40 circles, and inductance is 0.8mH.AC signal in experimentation in transmitting coil 1 produces alternating magnetic field, and by electromagnetic field spatial impression should and coil coupling mode make receiving coil 2 produce induced voltages, to obtain the required tiny signal of detecting instrument.The small voltage that receiving coil 2 produces coupling by receiving port is transferred to receiving trap 6, and controller 5 is connected with motion structure 4, and realizes the accurate locus of controlling between transmitting coil 1 and receiving coil 2, the tiny signal of simulating different amplitudes.
As shown in Figure 2, structured flowchart for controller 5, controller comprises stepper motor 7, the output terminal of stepper motor 7 is connected with motion structure 4, the input end of stepper motor 7 connects one drive circuit 8, and driving circuit 8 is connected by data line with slave computer processor I9, and the output terminal of slave computer processor I9 also connects the screen 10 for display waveform, the input end of slave computer processor I9 is also connected with button I11, for parameters.
In button I11, input signal generating means 3 sends the peak-to-peak value voltage of signal, the identical waveform that transmits in the coil turn of the peak-to-peak value voltage of the required tiny signal of detecting instrument, transmitting coil 1 and receiving coil 2 and selection and signal generation apparatus 3, all parameters are outputed in slave computer processor I9, and directly the required waveform morphology of detecting instrument is presented on screen 10 by data line, slave computer processor I9 is connected with stepper motor 7 through driving circuit 8.According to the electromagnetic field space principle of induction producing between transmitting coil 1 and receiving coil 2, slave computer processor I9 calculates due distance between transmitting coil 1 and receiving coil 2 through processing, and then control step motor 7 allows it move and controlled motion structure 4, make the receiving coil 2 being connected with motion structure 4 in correct locus, to guarantee the accuracy of detecting instrument.
As shown in Figure 3, structured flowchart for signal generation apparatus, signal generation apparatus comprises slave computer processor II14, slave computer processor II14 connects transmitting coil 1 by D/A converter 13, amplifier I12 successively, slave computer processor II14 is connected with wave memorizer 15, for stored waveform database, slave computer processor II14 connects a button II16, and slave computer processor II14 connects a display 17 by data line.
In the wave memorizer 15 of signal generation apparatus 3, select to detect the needed waveform of nuclear magnetic resonance water detection instrument, by data line, be transferred in slave computer processor II14.Button II16 is connected with slave computer processor II14 by data line, in button II16, key in the required magnitude of voltage of experiment and the Larmor frequency in tested region, waveform morphology, amplitude and the frequency of being processed by slave computer processor II14 all shows by the display 17 being connected with slave computer processor II14.Slave computer processor II14 delivers to waveform output in D/A converter 13 by data line, and D/A converter 13 converts the waveforms amplitude of digital quantity form to the analog quantity form signal that detects nuclear magnetic resonance water detection frequency synthesis that instrument requires.Through amplifier I12, this signal is carried out to Shape correction, and then obtain meeting the simulating signal of requirement of experiment.
As shown in Figure 4, receiving trap 6 receives the signal of receiving coil 2, and receiving coil 2 signals are connected with host computer 22 with receiving end 18, prime amplifier 19, amplifier II20, capture card 21 through receiving port successively.
In one section of continuous signal of signal generation apparatus 3 transmittings, the weak signal amplifier of receiving coil 2 inductions outputs in the prime amplifier 19 and amplifier II20 being comprised of mimic channel successively by receiving end 18, and the FID signal receiving is amplified and nursed one's health.Through amplification and the signal of conditioning after capture card 21 gathers, by serial bus, be sent to host computer 22.By host computer 22, can demonstrate the signal envelope curve that nuclear magnetic resonance water detection instrument collects, according to parameters such as signal aspect that in the parameters such as the form of enveloping curve and amplitude phase place and controller 5, screen 10 sets, amplitude phase places, compare, can effectively judge that whether nuclear magnetic resonance water detection instrument is working properly, complete the detection to nuclear magnetic resonance water detection instrument.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. a Detection of Weak Signals platform that detects nuclear magnetic resonance water detection instrument, is characterized in that, this platform comprises:
The transmitting coil that parallel coaxial arranges and receiving coil form electromagnetic coupler;
Signal generation apparatus, is connected with transmitting coil by transmitting terminal interface, by transmitting coil, launches the frequency signal identical with the Larmor frequency in tested region;
Receiving trap, is connected with receiving coil by receiving end interface, and receiving trap receives induced voltage by receiving coil and shows;
Motion structure, the lower end of receiving coil is arranged on motion structure, and motion structure is controlled the distance driving between receiving coil adjustment and transmitting coil by a controller, simulate different tiny signals;
Described controller input signal generating means send the peak-to-peak value voltage of signal, detect the coil turn of the peak-to-peak value voltage of the required tiny signal of nuclear magnetic resonance water detection instrument, transmitting coil and receiving coil and selection and signal generation apparatus in the identical waveform that transmits show.
2. the Detection of Weak Signals platform of detection nuclear magnetic resonance water detection instrument as claimed in claim 1, it is characterized in that, described controller comprises stepper motor, the output terminal of stepper motor is connected with motion structure, the input end of stepper motor connects one drive circuit, and driving circuit is connected by data line with a slave computer processor I, and the output terminal of slave computer processor I also connects the screen for display waveform, the input end of slave computer processor I is also connected with button I, for parameters.
3. the Detection of Weak Signals platform of detection nuclear magnetic resonance water detection instrument as claimed in claim 1, it is characterized in that, described signal generation apparatus comprises slave computer processor II, slave computer processor II connects transmitting coil by D/A converter, amplifier, amplifilter successively, slave computer processor II is connected with wave memorizer, for stored waveform database, slave computer processor II connects a button II, and slave computer processor II connects a display by data line.
4. the Detection of Weak Signals platform of detection nuclear magnetic resonance water detection instrument as claimed in claim 1, it is characterized in that, described receiving trap receives the signal of receiving coil, and receiving coil signal is connected with host computer with receiving end, prime amplifier, amplifier, capture card through receiving port successively.
5. the Detection of Weak Signals platform of detection nuclear magnetic resonance water detection instrument as claimed in claim 1, is characterized in that, the parameter of transmitting coil and receiving coil is that diameter is 30cm, and coil turn scope is between 20 to 40 circles, and inductance is 0.8mH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420156333.9U CN203849435U (en) | 2014-04-02 | 2014-04-02 | Weak signal detection platform for detecting nuclear magnetic resonance water detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420156333.9U CN203849435U (en) | 2014-04-02 | 2014-04-02 | Weak signal detection platform for detecting nuclear magnetic resonance water detector |
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| CN203849435U true CN203849435U (en) | 2014-09-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772161A (en) * | 2017-02-28 | 2017-05-31 | 吉林大学 | The multichannel array type receiving coil and detection method of radio sensing network |
| CN106770416A (en) * | 2016-12-22 | 2017-05-31 | 北京航空航天大学 | It is a kind of based on LabVIEW's129Xe nucleon relaxation time measuring systems |
| CN106814336A (en) * | 2015-11-27 | 2017-06-09 | 上海联影医疗科技有限公司 | A kind of radio frequency coil assemblies for magnetic resonance imaging |
-
2014
- 2014-04-02 CN CN201420156333.9U patent/CN203849435U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106814336A (en) * | 2015-11-27 | 2017-06-09 | 上海联影医疗科技有限公司 | A kind of radio frequency coil assemblies for magnetic resonance imaging |
| CN106814336B (en) * | 2015-11-27 | 2020-06-26 | 上海联影医疗科技有限公司 | Radio frequency coil assembly for magnetic resonance imaging |
| CN106770416A (en) * | 2016-12-22 | 2017-05-31 | 北京航空航天大学 | It is a kind of based on LabVIEW's129Xe nucleon relaxation time measuring systems |
| CN106772161A (en) * | 2017-02-28 | 2017-05-31 | 吉林大学 | The multichannel array type receiving coil and detection method of radio sensing network |
| CN106772161B (en) * | 2017-02-28 | 2019-04-30 | 吉林大学 | The multichannel array type receiving coil and detection method of wireless sensor network |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20150402 |
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| EXPY | Termination of patent right or utility model |