CN109407020A - A kind of magnetic axis measuring system of the solenoid coil based on suspension method - Google Patents
A kind of magnetic axis measuring system of the solenoid coil based on suspension method Download PDFInfo
- Publication number
- CN109407020A CN109407020A CN201811553643.3A CN201811553643A CN109407020A CN 109407020 A CN109407020 A CN 109407020A CN 201811553643 A CN201811553643 A CN 201811553643A CN 109407020 A CN109407020 A CN 109407020A
- Authority
- CN
- China
- Prior art keywords
- photodetector
- suspension
- signal
- solenoid coil
- magnetic axis
- 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.)
- Granted
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000009434 installation Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000005622 photoelectricity Effects 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 14
- 230000003068 static effect Effects 0.000 description 24
- 230000008859 change Effects 0.000 description 17
- 238000012545 processing Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 8
- 230000003321 amplification Effects 0.000 description 7
- 238000003199 nucleic acid amplification method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 230000005693 optoelectronics Effects 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1261—Measuring magnetic properties of articles or specimens of solids or fluids using levitation techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0023—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0023—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration
- G01R33/0029—Treating the measured signals, e.g. removing offset or noise
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0023—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration
- G01R33/0041—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration using feed-back or modulation techniques
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a kind of magnetic axis measuring system of solenoid coil based on suspension method, the system comprises: across the metal suspension of solenoid coil to be measured, metal suspension both ends are connect after bypassing positioning pulley with traction；Metal suspension is each passed through in the middle part of the horizontal direction photodetector of two orthogonal installations, in the middle part of vertical direction photodetector；Metal suspension is each passed through in the middle part of the Helmholtz coil of two orthogonal installations；Wherein, the light head of photodetector is respectively connected with a driver circuit, and the reception head of photodetector is respectively connected with a signal detection route；Metal suspension and solenoid coil to be measured are connected separately with a driving power；Wherein, the driver circuit of photodetector light head is driven using continuous current.Improve the ability that measuring system resists external interference effect of signals.
Description
Technical field
The present invention relates to the magnetic axis fields of measurement of solenoid coil, and in particular, to a kind of solenoid based on suspension method
The magnetic axis measuring system of coil.
Background technique
It is a kind of magnetic axis measurement method very versatile at present with the magnetic axis measurement that suspension method carries out solenoid coil, wherein
Comparing crucial measurement part is the non-cpntact measurement to tiny suspension vibration position.Suspension is diameter about 0.1mm left and right horizontal
The wire of placement, and pass through solenoid coil among, both ends drawn by weight it is exceptionally straight, without measurement when be static.
It when needing to measure, needs to be powered thereon, and solenoid coil will also be powered, axial magnetic can be generated among such solenoid
?.If suspension is not on magnetic axis, suspension will necessarily be caused by certain transverse direction because of the effect of transverse magnetic field components
The effect of power and vibrate, the size (i.e. magnetic axis offset and inclination angle) of the amplitude variable quantity of vibration and shape etc. and magnetic axis has
It closes.If the Vibration Condition of suspension can be measured, so that it may calculate the size of magnetic axis.
In the magnetic axis measuring system based on suspension method, the vibration of suspension is carried out using the detector of optoelectronic switch type
Detection.Detector is made of the light head and light-receiving head of a pair of of very little staggered relatively, and light head emits light, is received
Head receives light and generates corresponding photoelectric current wherein, and how much related the size of photoelectric current and the light received is；By suspension
It is placed in light head and receives among head, the light that suspension can stop light head to be emitted enters reception head.When suspension vibration,
The light portion of blocking changes, and causes the light for receiving head acquisition also to generate variation, and in the photoelectricity for wherein generating variation
Stream, the Oscillation Amplitude of corresponding suspension；Therefore, the variation for detecting photoelectric current also just detects the Vibration Condition of suspension.But it visits
The operating current of device is surveyed generally at several milliamperes or so, and the photoelectric current that can change is about at several microamperes or so；In current suspension
In vibration measurement, the method for use is first to be converted the operating current of detector to together with signal code using a resistance
Voltage signal must just reuse the blocking of a high magnification numbe (50 times to 100 times) since direct current signal level therein is higher
AC amplifier amplifies to obtain measurement data the voltage signal of minor change therein.In this measurement process
In, exchange blocking amplifier is used in order to obtain tiny signal variation, therefore, which cannot obtain detector
DC operation information actually cannot also obtain the location information of suspension stationary state；It is visited in general, suspension is needed to be in
The middle position for surveying device better gets relatively good measuring signal, in order to which suspension position to be adjusted to the interposition to detector
It sets, this is often completed using very expensive laser tracker and adjusts work, and because of the reason of alignment precision limits,
Remaining on, which there are problems that, to be highly precisely aligned, therefore can generate shadow to the vibration detecting of suspension to a certain extent
It rings.On the other hand, since the frequency of the pulsed drive current applied on suspension is lower, generally in 20Hz or so, in order to obtain as far as possible
Low frequency signal in must vibrating, the capacity of the block capacitor of use be it is very big, reach about 1000 μ f or more, this may to letter
Number strap carrys out some problems.In such measuring system, the magnetic axis measuring signal of acquisition is deposited always with inclination measurement signals
It in certain coupling phenomenon, can not separate well, adverse effect is generated to final magnetic axis parameter, it cannot be more into one
Improve the precision of magnetic axis measurement in step ground.Simple signal is based on due to generally using in the position measuring system of suspension vibration
The principle of amplification, no matter specifically using which kind of measurement route, but from without departing from this principle is crossed, cause the installation of measuring system with
There are certain inconvenience and inaccuracy, performance deficiency also causes offset and tilt signals in magnetic axis measuring signal to be begun for debugging
It is coupled eventually；Simultaneously because effective measuring signal of magnetic axis be superimposed upon on significantly vibration signal it is one smaller
The signal of amplitude, the route using above-mentioned measuring principle are the i.e. effectively measurements that can not obtain effective measuring signal of enough amplitudes
Signal amplitude is smaller, brings certain difficulty for subsequent measuring signal processing, more serious influence is caused to measurement accuracy.
Summary of the invention
The present invention provides a kind of magnetic axis measuring systems of solenoid coil based on suspension method, improve measuring system and resist
The ability of external interference effect of signals.
For achieving the above object, this application provides a kind of measurements of the magnetic axis of solenoid coil based on suspension method is
System, the system comprises:
Across the metal suspension of solenoid coil to be measured, metal suspension both ends connect after bypassing positioning pulley with traction
It connects；Metal suspension is each passed through the horizontal direction photodetector middle part of two orthogonal installations, vertical direction photodetection
In the middle part of device；Metal suspension is each passed through in the middle part of the Helmholtz coil of two orthogonal installations；Wherein, the hair of photodetector
Shaven head is respectively connected with a driver circuit, and the reception head of photodetector is respectively connected with a signal detection route；Metal suspension with to
It surveys solenoid coil and is connected separately with a driving power；Wherein, the driver circuit of photodetector light head uses Constant Electric Current
Stream driving.
Preferably, the driver circuit of photodetector light head is driven using continuous current, specifically: voltage-stablizer voltage is defeated
Enter end to connect with current source, voltage-stablizer voltage output end is connect with first resistor anode, first resistor cathode and photodetector
Light head connection, the cathode of voltage-stablizer voltage adjustable side and first resistor connects.
Preferably, signal detection route includes: the first operational amplifier, the first electric current absorption branch, sample resistance, filtering
Device；Photodetector receives head and connect with the negative input end of the first operational amplifier, and the negative input end of the first operational amplifier is
The node of signal confluence；The positive input terminal of first operational amplifier is grounded, and the output end and filter of the first operational amplifier connect
It connects, the output end of filter is signal detection route output end；The both ends of the sample resistance node and the with signal confluence respectively
The output end of one operational amplifier connects；First electric current absorbs branch and connect with the node that signal converges.
Preferably, each photodetector is correspondingly provided with a compensation photodetector in the system, compensates photoelectricity
The working environment of the corresponding photodetector of detector is identical, compensates the reception head of photodetector and corresponding photodetection
The signal confluence node connection of device signal detection route.
Preferably, the system also includes data collector, data collector is connect with the output end of signal detection route.
Preferably, the data collector includes: differential operational amplifier, converter, D/A converter；Calculus of differences is put
The positive input terminal of big device is connect with the output end of signal detection route, the output end of differential operational amplifier and converter it is defeated
Outlet connection, the output end of converter and the Memory linkage of data collector, the memory of data collector and D/A converter
Input terminal connection, the output end of D/A converter and the negative input end of differential operational amplifier connect.
Preferably, the system is in metal suspension among photodetector by adjusting the position of photodetector
Position.
Preferably, photodetector includes light head and receives head, and metal suspension is located at light head and receives among head.
Preferably, system metal suspension in measurement is in tight state.
Preferably, the coil is Helmholtz coil.
The magnetic axis measuring signal processing system for the solenoid coil that the present invention illustrates include photodetector constant current with
Constant pressure driving, a kind of critical circuits that operating bias current canceling can be completed under higher signal Horizontal offset, Yi Zhongke
To eliminate the compensated line of detector drift performance, setting suspension static position indicates reading plotter etc..
The application solves technical solution used by its technical problem: in the magnetic axis measuring system of solenoid coil,
The vibration of suspension is measured using a kind of photodetector of optoelectronic switch type.Firstly, using a kind of constant current driver circuit
The light head of photodetector is powered, it is luminous invariable to ensure, power supply line's fluctuation is reduced to measuring signal
Influence.Secondly, equally the mode of constant pressure operating voltage is used to be powered to reduce work for the driving problems for receiving head
Influence of the variation of point voltage to measurement tiny signal；On the one hand it is powered using constant voltage source, it is not intended that receiving head
Operating voltage be exactly constant pressure, it is also necessary to receive head the other end handle；Here, utilizing opamp input terminal
Virtual earth concept, by the way that the output end for receiving head is accessed the negative input end of operational amplifier and is grounded by amplifier positive input terminal
Mode and achieve the purpose that for detector reception head be grounded in the form of virtual earth, to obtain the drive of real constant pressure on receiving head
It is dynamic, reduce influence of its voltage change to signal code.In this signal measurement form, direct detection be current signal and
It is no longer voltage signal.But detector static working current is about in several milliamperes of ranks, and useful signal electric current is about at several microamperes
Rank differs about 1000 times, if signal processing can there are problems that being difficult to overcome only with simple amplifying circuit.Cause
This, needs to offset detector static working current, and the signal code for only extracting its generation carrys out processing for signal.Due to fortune
The negative input end for calculating amplifier is a virtual address structure, as a kind of node of electric current confluence, various electric currents is allowed to flow herein
Into with outflow, have no effect on the running parameter of circuit；The branch that the absorption of an electric current can be increased on it, thus by detector
Static working current be absorbed into other places；When absorption electric current is equal with static working current, even if in this node
Upper there are also other branches, and electric current thereon is also zero.If detector produces variation (such as suspension of signal code under light illumination
Vibration generates) and operating current is caused to change, then the electric current passed in and out on this node will change, if there is other electricity
The branch flowed into or out, then the electric current of this variation will be passed in and out from the branch, to only generate on it relevant to signal intensity
Electric signal avoids seriously affecting for higher DC current (static working current) generation, plays tiny signal electric current
The effect extracted and individually handled.It again can be by the electricity of microampere order by the resistance of a resistance value larger (such as 100 kilo-ohms of grades)
Circulation is changed to the voltage signal of volt grade, consequently facilitating the processing of first signal processing system, it might even be possible to direct without amplification
For digital-to-analogue conversion to obtain signal numerical value for calculation processing；The resistance value for changing transfer resistance, will not change other processing
Partial circuit parameter is very suitable for the signal processing of different bandwidth.In such Signal Measurement System, due to detecting
Be the equal of that suspension (may have certain deviation, but can form corresponding pass relative to the actual position signal of detector
System！), therefore, the measuring signal that it can obtain the static position of suspension is used to judge the position of suspension, while playing suspension
The regulatory function of static position avoids measuring suspension position using other expensive, high-precision instruments, can be with
Increase substantially the efficiency of debugging.Further electric current eliminate line principle can also increase a detector drift (when drift with
Temperature drift) compensated line part: at electric current confluence node, increase the measurement branch that is in all the way with detector in identical environment
But a position is passed through without suspension, and operating current is in outflow state, to offset the quiet of suspension actual measurement branch
State operating current；Since detector static working current cannot be completely counterbalanced by there may be certain difference, therefore can be
The adjustable constant-current source branch in direction all the way is further added by node to offset the electric current that this part fails to be completely counterbalanced by.Such detection
Structure has the compensation and negative function of certain drift performance, so as to improve the capability of influence for inhibiting to drift about to measurement,
Also the precision of measurement can be improved to a certain extent.
The application, which uses one kind, can eliminate the signal processing circuit principle of high bias level, can be merely to suspension
The tiny signal electric current that generates when vibration carries out conversion process, without high-amplification-factor amplifier come to measuring signal into
Row amplification, the variation and signal code for eliminating former line work point change the pass having an impact to measuring signal that is coupled
Key problem；Meanwhile in order to improve the ability that measuring system resists external interference effect of signals, uses high-precision constant current and drive
Form detector is driven, on the other hand, change influence to output signal electric current to reduce detector operating point,
Driving and signal extraction are carried out using output end of the access way virtually to detector, is ensuring detector operating point not
Magnetic axis signal processing of the purer suspension vibration position signal for solenoid coil is obtained in the case where change, in very great Cheng
The influence that the low frequency baseline tilt in original measuring signal and fluctuating are eliminated on degree, makes offset in magnetic axis measuring signal and inclines
Oblique signal is more easier to separate, and improves the resolution capability of measuring signal, and then obtain increasing substantially in measurement accuracy.It adopts
Measurement method can obtain the corresponding signal of suspension static position simultaneously, solve the problems, such as the adjusting of suspension static position,
The difficulty and cost that suspension static position is accurately adjusted are considerably reduced, measuring device has also been significantly increased
Debugging efficiency.
One or more technical solution provided by the present application, has at least the following technical effects or advantages:
On the one hand detector is driven using constant current, to obtain more stable working condition；On the other hand, one kind is used
The signal processing circuit principle of high bias level can be eliminated, the tiny signal electric current generated when can merely vibrate to suspension
Carry out conversion process and simultaneously obtain the enough voltage signals of amplitude, without high-amplification-factor amplifier come to measuring signal into
Row amplification, the variation and signal code for eliminating former line work point change the pass having an impact to measuring signal that is coupled
Key problem largely eliminates the influence of the low frequency baseline tilt in original measuring signal and fluctuating, measures magnetic axis
Offset in signal is more easier to separate with tilt signals, improves the resolution capability of measuring signal, and then obtain measurement accuracy
On increase substantially.The measurement method of use can obtain the corresponding signal of suspension static position simultaneously, and it is quiet to solve suspension
The problem that state position is adjusted, considerably reduces the difficulty and cost that suspension static position is accurately adjusted, also significantly
Ground improves the debugging efficiency of measuring device.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention；
Fig. 1 is solenoid coil magnetic axis measuring system structure and schematic layout pattern based on suspension method；
Fig. 2 is the composition schematic diagram of the photodetector of optoelectronic switch type；
Fig. 3 is the constant current driving principle figure of photodetector light head；
Fig. 4 is usual signal detection schematic circuit；
Fig. 5 is with the signal processing circuit schematic diagram for eliminating high bias level；
Fig. 6 is the schematic circuit for inhibiting drift effect；
Fig. 7 is suspension static position adjustment signal variation explanatory diagram；
Fig. 8 is the route principle explanatory diagram of data acquisition；
Fig. 9 a-b is the measuring signal comparison diagram of magnetic axis offset；
Figure 10 a-b is the inclined measuring signal comparison diagram of magnetic axis；
1- metal suspension line in figure, 2- positioning pulley, 3- traction, the direction 4-X photodetector, the direction 5-Y photoelectricity
Detector, 6- solenoid coil, 7- Helmholtz coil, 8- photodetector driver circuit, the detection of 9- photo detector signal
Route, 10- photodetector light head, 11- photodetector reception head, 12- adjustable constant-flow current source, 13- operational amplifier,
14- sample resistance, the photodetector of 15- compensation function, 16- differential operational amplifier, 17-AD converter, the acquisition of 18- data
Device, 19-DA converter.
Specific embodiment
The present invention relates to a kind of magnetic axis measuring systems of solenoid coil based on suspension method, can be straight by the way that one kind is arranged
The current source circuit for eliminating higher offset operation point voltage is connect, influence of the signal intensity to operating point is reduced, to extract superposition
Small variable signal on a biggish signal of amplitude, then the offset of magnetic axis and the processing of tilt signals are carried out, simultaneously
The signal that the technology can obtain the static initial position of suspension avoids to obtain the ability of its position instruction using valence
The precision instrument of lattice valuableness adjusts to carry out the position of suspension, can increase substantially the working efficiency of test.
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the case where not conflicting mutually, the application's
Feature in embodiment and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
Implemented with being different from the other modes being described herein in range using other, therefore, protection scope of the present invention is not by under
The limitation of specific embodiment disclosed in face.
Solenoid coil magnetic axis measuring system:
Fig. 1 is the basic composition of the magnetic axis measuring system of the solenoid coil based on suspension method, is mainly mutually hung down by two groups
X-direction photodetector 4, Y-direction photodetector 5 and the photodetector driver circuit 8 and photodetector directly installed are believed
Number detection 9, two groups of route be mutually perpendicular to installation coil such as Helmholtz coil 7 and its driving constant-current source I3, by positioning slide
Wheel 2 positioning and by traction 3 care for tighten diameter about 0.1mm metal suspension line 1 and its driving power I2,
The constant-current source I1 etc. of tested solenoid coil 6 and its driving is constituted, and additionally includes data acquisition relevant portion.
1 both ends of metal suspension line are tightened and are in a horizontal position using the traction 3 of pendency, and ensure metal
Suspension line 1 is in the middle position (reaching by adjusting detector mounting bracket etc.) of two groups of photodetectors 4,5 and is in
The axial centerline of solenoid coil 6.Metal suspension line 1 loads the pulse current of low frequency, and tested solenoid coil 6 also loads
One constant current generates a magnetic field inside solenoid, while Helmholtz coil 7 also loads certain electric current to metal
The vibration of suspension line 1 is modulated；When solenoid magnetic axis is there are when deviation, namely has certain angle with metal suspension line 1,
The cross stream component (being approximately perpendicular to silk thread) in the magnetic field then generated due to solenoid coil 6 can make the metal suspension for being loaded with electric current
Line 1 by the Lorentz force of a transverse direction effect and generate the mechanical oscillation for being superimposed modulating action, metal suspension line 1
Modulated amplitude and transverse magnetic field components along axial integrated value, metal suspension line 1 width of current impulse and amplitude at just
Than by the amplitude waveform of measurement metal suspension line 1 to obtain modulated amplitude thereon, by suspension line driving current, solenoid
The parameters such as coil working electric current can obtain the magnetic axis information of solenoid coil, including offset and inclination angle by calculating.
The constant current of photodetector drives:
The light head 10 of photodetector 4,5 is driven using continuous current, to improve luminous stability, reduces the wave that shines
Dynamic influence.A kind of specific circuit form as shown in figure 3, in figure use three end floating regulator LM317 of one kind,
If resistance uses 60 ohm, the constant current generated about 20mA can be used for driving the light head of photodetector.
The conventional process principle of photo detector signal detection:
Having the conventional process in the tiny signal detection technique under higher bias level at one is using exchange blocking
Amplifier come to the small signal being superimposed upon on big signal extract with amplify, as shown in figure 4, this is also solenoid coil magnetic
The line principle that axis measuring technique uses always, is improved anyway, and basic principle was from having not been changed.
The static working current of photodetector is in the level of several mA, and when suspension vibration, the curent change of generation is about
The level of number μ A or so.Common signal detection route as shown in figure 4, measurement point DC offset voltage generally all in number
The level of volt, and amplitude of variation of useful signal only number mV or so are therefore, general using exchange blocking amplifier (or band logical
Filter BPF) signal is amplified, direct current signal is isolated using capacity very big coupled capacitor Co and AC signal leads to
It crosses, amplification factor, which needs to reach a higher level, can just obtain the useful signal with notable difference, and generally about 50 times
Left and right is bigger；Since the frequency of driving pulse is 20Hz or so, then require coupled capacitor Co capacity larger to low frequency signal
With preferable coupling effect, but it is also easy to produce the tilt problem of low frequency background signal, so that magnetic axis inclination is coupled with shifted signal
Together, it is unfavorable for the separating treatment of signal.Improvement also only carries out in the performance of filter, design anyway after
After filter circuit, there is a cutoff frequency always in low frequency end, DC bias signal cannot be obtained；Due to this route
It is based on the enhanced processing to small signal variation, output signal only reflects the amplitude dynamic change during suspension linearly coupled
Situation cannot obtain the actual position signal of suspension line in output end, suspension line cannot be known exactly which relative to detector
Position is unfavorable for the adjusting of suspension line initial static position, to generate adverse effect to good vibration signal is obtained.
The improvement of photo detector signal detection:
In order to obtain the actual position signal and static position regulating power of the vibration of metal suspension 1, to usual detection line
Road principle is improved, as shown in figure 5, the handling principle that the biasing for using a kind of similar difference is eliminated.
Using the virtual earth concept of 13 input terminal of operational amplifier, voltage-stabilizing working power supply is provided for the optical receiving end 11 of detector
Vref (+10V) eliminates influence of the output signal variation to operating point.Select negative terminal input bias current and drift all smaller
Operational amplifier 13, with reduce to measurement electric current Is influence；Converge the negative input end of operational amplifier 13 as signal
Node, and electric current is separately provided and absorbs branch 12 (Ic), electric current thereon can be with the biggish static work of offset detector
Make electric current Is, the tiny signal electric current Δ i stream generated when so that can there was only suspension linearly coupled on sample resistance 14 (Ro)
It crosses and generates a biggish voltage signal Vo ' (Vo '=Δ iRo, determined by Ro resistance value) in output end.The subsequent place of signal
Reason is simpler, only needs the amplification of low-pass filtering treatment or low magnification, and specific measure in route uses based on multiple spot
The chebyshev low-pass filter LPF of feedback, passband 2kHz, passband fluctuation 0.3dB, cutoff frequency 6kHz, attenuation outside a channel
Not less than 50dB.In such measurement route, the amplitude of output signal and two factors in relation to the initial position of: suspension line and
The resistance value of resistance Ro.The initial position of suspension line directly affects the size that vibration signal amplitude can change, and effectively becomes to signal
Change range to have an impact；Ro directly has an impact the voltage output signal amplitude of transformation, and the change of Ro resistance value will not be to subsequent
Filter parameter generate any influence, be conducive to field adjustable.Due to output signal be with detector output electric current (including become
Change part) it is directly related, although eliminating quiescent current signal section, but still the actual position information of suspension is contained,
Therefore, which can obtain the static initial position of suspension line, have in the case where not by other high precision measuring instruments
It is adjusted conducive to the initial position of suspension line, to improve measurement efficiency.
The compensation of photo detector signal detection:
The influence to photodetector such as variation and temperature drift, time drift for environmental lighting conditions, Ke Yi
Certain improvement is carried out in the application structure of detector, as shown in Figure 6.Assuming that photodetector 11 (T1) is surveyed for suspension vibration
Amount, photodetector 11 (T2) is for compensating, then T2 only needs to be in identical working environment with T1；At this point, the static state of T1
The quiescent current Is1 of electric current Is and T2 should can simultaneously can be to a certain extent with cancellation, including drift performance, this form
Offset detector drift includes the problem of ambient light variation is brought.But there may be the factors of device performance discreteness, and lead
Send a telegraph stream can not complete cancellation, the adjustable constant-current source 12 (Ic) of an electric current and direction can be further added by this time and be used for
The electric current for offsetting this part, is obtained with the ability handled pure tiny signal in this way.
This ability is obtained for solving the problems, such as that measuring signal slow drift has larger effect to improve reference signal
The quality taken is conducive to being further processed for signal.
The adjusting of suspension static position:
Suspension is set to be in detector middle position to reach indeed through the position for adjusting photodetector.It adjusts
The mounting bracket of detector allows suspension to be horizontally through detector middle position to and fro, knows from experience position instruction reading variation
One process, substantially the maximum value situation of understanding position instruction reading；Adjusting bracket makes position readings value be generally in maximum reading
At or near numerical value, the position of suspension is substantially at the middle position of detector at this time.This process is as shown in Figure 7.This
Function of the regulative mode of sample since suspension Vibration-Measuring System itself is utilized avoids and in addition uses expensive precision
Instrument greatly simplifies the adjusting difficulty of suspension position, and the efficiency of suspension position adjusting has been significantly increased.
Data collection system:
When acquiring reference signal, a constant bias value is exported by the data collector 18 with D/A conversion function 19
Such as zero until outside, and is input to the negative input end of a differential operational amplifier 16, and the positive input terminal of difference amplifier 16 is defeated
Enter the processed suspension vibration signal in front, what the practical input terminal in data collector 18 obtained at this time is exactly reference signal,
And data conversion is carried out, it is stored in the memory of data collector 18.When the modulation vibration signal of suspension to be acquired, need synchronously
It is reconverted into analog signal in the reference signal that the D/A output end 19 of data collector 18 has acquired front, in differential amplification
Calculus of differences is carried out with suspension vibration signal on device 16 and obtains a pure modulation vibration signal for data collector 18
A/D conversion, the signal obtained at this time is needed the signal that can be used for calculating magnetic axis parameter.This process such as Fig. 8 institute
Show.
The effect of photo detector signal detection:
Under same measuring condition and environment, by using original measurement route and measuring system of the present invention simultaneously to outstanding
Silk vibration compares measurement.The magnetic axis inclination measurement waveform of acquisition is as shown in figures 9 a-b；It is apparent that in the level of unlike signal
Under, the useful signal that this measuring system obtains all is quite straight square waveform or only has relatively small inclination, with reason
By analog result than more consistent, be conducive to being further processed for signal.In the signal obtained by original measuring system, then exist
More serious baseline tilt, and have certain distorting event, cause the data processing of signal that there is certain difficulty.The magnetic of acquisition
Axle offset measured waveform is as illustrated in figures 10 a-b；It include the shifted signal waveform being superimposed upon in tilt signals.Due to baseline
Part opposing straight (corresponding tilt signal), therefore the shifted signal (mountain peak part) of magnetic axis is easier to differentiate and extract, it can be with
Improve the precision of measurement；The relatively macrorelief that there is baseline always in the signal obtained by original measuring system and obviously inclination,
When shifted signal becomes smaller, it is more likely to not be identified, therefore measurement accuracy is unable to reach higher level.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of magnetic axis measuring system of the solenoid coil based on suspension method, which is characterized in that the system comprises:
Across the metal suspension of solenoid coil to be measured, metal suspension both ends are connect after bypassing positioning pulley with traction；
Metal suspension is each passed through in the middle part of the horizontal direction photodetector of two orthogonal installations, in vertical direction photodetector
Portion；Metal suspension is each passed through in the middle part of the Helmholtz coil of two orthogonal installations；Wherein, the light head of photodetector
It is respectively connected with a driver circuit, the reception head of photodetector is respectively connected with a signal detection route；Metal suspension and spiral shell to be measured
Spool coil is connected separately with a driving power；Wherein, the driver circuit of photodetector light head is driven using continuous current
It is dynamic.
2. the magnetic axis measuring system of the solenoid coil according to claim 1 based on suspension method, which is characterized in that photoelectricity
The driver circuit of detector light head is driven using continuous current, specifically: voltage-stablizer voltage input end is connect with current source, surely
Depressor voltage output end is connect with first resistor anode, the light head connection of first resistor cathode and photodetector, voltage-stablizer
The connection of the cathode of voltage adjustable side and first resistor.
3. the magnetic axis measuring system of the solenoid coil according to claim 1 based on suspension method, which is characterized in that signal
Detection route includes: the first operational amplifier, the first electric current absorption branch, sample resistance, filter；Photodetector receives head
It is connect with the negative input end of the first operational amplifier, the negative input end of the first operational amplifier is the node of signal confluence；First
The positive input terminal of operational amplifier is grounded, and the output end of the first operational amplifier is connect with filter, and the output end of filter is
Signal detection route output end；The output end of node and the first operational amplifier that the both ends of sample resistance are converged with signal respectively
Connection；First electric current absorbs branch and connect with the node that signal converges.
4. the magnetic axis measuring system of the solenoid coil according to claim 3 based on suspension method, which is characterized in that described
Each photodetector is correspondingly provided with a compensation photodetector, the corresponding photoelectricity of compensation photodetector in system
The working environment of detector is identical, compensates the signal for receiving head with corresponding photo detector signal detection route of photodetector
The node that converges connects.
5. the magnetic axis measuring system of the solenoid coil according to claim 1 based on suspension method, which is characterized in that described
System further includes data collector, and data collector is connect with the output end of signal detection route.
6. the magnetic axis measuring system of the solenoid coil according to claim 5 based on suspension method, which is characterized in that described
Data collector includes: differential operational amplifier, converter, D/A converter；The positive input terminal and letter of differential operational amplifier
The output end of the output end connection of number detection route, the output end of differential operational amplifier and converter connects, converter
Output end and data collector Memory linkage, the input terminal of the memory of data collector and D/A converter connects, DA conversion
The output end of device and the negative input end of differential operational amplifier connect.
7. the magnetic axis measuring system of the solenoid coil according to claim 1 based on suspension method, which is characterized in that described
System makes metal suspension be in photodetector middle position by adjusting the position of photodetector.
8. the magnetic axis measuring system of the solenoid coil according to claim 1 based on suspension method, which is characterized in that photoelectricity
Detector includes light head and receives head, and metal suspension is located at light head and receives among head.
9. the magnetic axis measuring system of the solenoid coil according to claim 1 based on suspension method, which is characterized in that described
System metal suspension in measurement is in tight state.
10. the magnetic axis measuring system of the solenoid coil according to claim 1 based on suspension method, which is characterized in that institute
Stating coil is Helmholtz coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811553643.3A CN109407020B (en) | 2018-12-18 | 2018-12-18 | Magnetic axis measurement system of solenoid coil based on suspension wire method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811553643.3A CN109407020B (en) | 2018-12-18 | 2018-12-18 | Magnetic axis measurement system of solenoid coil based on suspension wire method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109407020A true CN109407020A (en) | 2019-03-01 |
| CN109407020B CN109407020B (en) | 2023-10-20 |
Family
ID=65460012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811553643.3A Active CN109407020B (en) | 2018-12-18 | 2018-12-18 | Magnetic axis measurement system of solenoid coil based on suspension wire method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109407020B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074620A (en) * | 2021-05-11 | 2021-07-06 | 北京理工大学 | Metal pipeline composite parameter measuring method and system based on elevation intersection point |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB575463A (en) * | 1944-03-18 | 1946-02-19 | Hughes Henry & Son Ltd | Improvements in and relating to means for the measurement of magnetic field intensities |
| US5289445A (en) * | 1992-02-11 | 1994-02-22 | International Business Machines Corporation | Suspension system for focus actuator of an optical disk drive |
| CN1215160A (en) * | 1997-10-06 | 1999-04-28 | 胡斯可国际股份有限公司 | Method and device for testing armature position in magnetic resistance type electromagnet actuator |
| CN1619270A (en) * | 2003-11-17 | 2005-05-25 | 中国科学院生物物理研究所 | Torque measuring device |
| CN1714458A (en) * | 2002-05-07 | 2005-12-28 | 加利福尼亚技术学院 | An apparatus and method for two-dimensional electron gas actuation and transduction for GAAS NEMS |
| CN2781366Y (en) * | 2005-04-28 | 2006-05-17 | 北京印刷学院 | Magnetomotive oxygen analyser with self-feedback damping buffer stablizer |
| CN101408596A (en) * | 2008-11-28 | 2009-04-15 | 清华大学 | Method and device for measuring electrical pure iron coercive force and relative magnetic permeability of weak magnetic material |
| CN101893721A (en) * | 2010-06-28 | 2010-11-24 | 吉林大学 | Wide-dynamic-range high-temperature superconducting magnetometer |
| CN102914489A (en) * | 2012-11-08 | 2013-02-06 | 河北联合大学 | Device and method for measuring viscosity electromagnetic property of covering slag under high-temperature state |
| CN103257326A (en) * | 2012-02-17 | 2013-08-21 | 上海联影医疗科技有限公司 | Material magnetism detection device and test method thereof |
| CN203299362U (en) * | 2013-06-24 | 2013-11-20 | 上海大学 | Saturation magnetization intensity measuring device |
| CN103414099A (en) * | 2013-09-01 | 2013-11-27 | 北京航空航天大学 | Light intensity stabilizing system based on Faraday optical rotation effect |
| CN103528511A (en) * | 2013-10-18 | 2014-01-22 | 南京师范大学 | Sinusoidal phase modulation type laser self-mixing interferometer and measuring method thereof |
| CN104330754A (en) * | 2014-09-29 | 2015-02-04 | 北京美尔斯通科技发展股份有限公司 | Superconducting weak magnetic signal detection magnetometer |
| CN105203975A (en) * | 2015-10-13 | 2015-12-30 | 中国工程物理研究院流体物理研究所 | Pulse double-line magnetic axis measurement method |
| CN105891050A (en) * | 2016-03-31 | 2016-08-24 | 山东大学 | Variable magnetic field high-temperature melt oscillation viscometer and rapid measurement method thereof |
| CN107167846A (en) * | 2017-05-19 | 2017-09-15 | 吉林大学 | The air-ground quick Geomagnetism Information measurement apparatus of combination multifunction high-precision and measuring method |
-
2018
- 2018-12-18 CN CN201811553643.3A patent/CN109407020B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB575463A (en) * | 1944-03-18 | 1946-02-19 | Hughes Henry & Son Ltd | Improvements in and relating to means for the measurement of magnetic field intensities |
| US5289445A (en) * | 1992-02-11 | 1994-02-22 | International Business Machines Corporation | Suspension system for focus actuator of an optical disk drive |
| CN1215160A (en) * | 1997-10-06 | 1999-04-28 | 胡斯可国际股份有限公司 | Method and device for testing armature position in magnetic resistance type electromagnet actuator |
| CN1714458A (en) * | 2002-05-07 | 2005-12-28 | 加利福尼亚技术学院 | An apparatus and method for two-dimensional electron gas actuation and transduction for GAAS NEMS |
| CN1619270A (en) * | 2003-11-17 | 2005-05-25 | 中国科学院生物物理研究所 | Torque measuring device |
| CN2781366Y (en) * | 2005-04-28 | 2006-05-17 | 北京印刷学院 | Magnetomotive oxygen analyser with self-feedback damping buffer stablizer |
| CN101408596A (en) * | 2008-11-28 | 2009-04-15 | 清华大学 | Method and device for measuring electrical pure iron coercive force and relative magnetic permeability of weak magnetic material |
| CN101893721A (en) * | 2010-06-28 | 2010-11-24 | 吉林大学 | Wide-dynamic-range high-temperature superconducting magnetometer |
| CN103257326A (en) * | 2012-02-17 | 2013-08-21 | 上海联影医疗科技有限公司 | Material magnetism detection device and test method thereof |
| CN102914489A (en) * | 2012-11-08 | 2013-02-06 | 河北联合大学 | Device and method for measuring viscosity electromagnetic property of covering slag under high-temperature state |
| CN203299362U (en) * | 2013-06-24 | 2013-11-20 | 上海大学 | Saturation magnetization intensity measuring device |
| CN103414099A (en) * | 2013-09-01 | 2013-11-27 | 北京航空航天大学 | Light intensity stabilizing system based on Faraday optical rotation effect |
| CN103528511A (en) * | 2013-10-18 | 2014-01-22 | 南京师范大学 | Sinusoidal phase modulation type laser self-mixing interferometer and measuring method thereof |
| CN104330754A (en) * | 2014-09-29 | 2015-02-04 | 北京美尔斯通科技发展股份有限公司 | Superconducting weak magnetic signal detection magnetometer |
| CN105203975A (en) * | 2015-10-13 | 2015-12-30 | 中国工程物理研究院流体物理研究所 | Pulse double-line magnetic axis measurement method |
| CN105891050A (en) * | 2016-03-31 | 2016-08-24 | 山东大学 | Variable magnetic field high-temperature melt oscillation viscometer and rapid measurement method thereof |
| CN107167846A (en) * | 2017-05-19 | 2017-09-15 | 吉林大学 | The air-ground quick Geomagnetism Information measurement apparatus of combination multifunction high-precision and measuring method |
Non-Patent Citations (1)
| Title |
|---|
| 章文卫, 李洪, 王华岑, 刘承俊, 丁伯南: "采用脉冲悬丝法测量强流加速腔聚焦场磁轴", 强激光与粒子束, no. 02 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074620A (en) * | 2021-05-11 | 2021-07-06 | 北京理工大学 | Metal pipeline composite parameter measuring method and system based on elevation intersection point |
| CN113074620B (en) * | 2021-05-11 | 2022-04-08 | 北京理工大学 | Metal pipeline composite parameter measuring method and system based on elevation intersection point |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109407020B (en) | 2023-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112731226B (en) | Single-beam atomic magnetometer biasing and noise suppression method based on light intensity difference | |
| CN104569544B (en) | Faradic currents sensor and faraday's temperature sensor | |
| CN107014774A (en) | A kind of double air chamber trace gas analysis systems and gas concentration in parallel calculate method | |
| JP5296857B2 (en) | Optical encoder with code wheel misalignment correction and automatic gain control | |
| US5521555A (en) | Ultra low noise optical receiver | |
| CN103797330A (en) | Light detection circuit | |
| CN111609918A (en) | Optical fiber distributed vibration sensing system based on envelope detection circuit | |
| CN107091808A (en) | A kind of anti-interference of stray light photodetector system based on digital servo-control | |
| CN105355704A (en) | Symmetrical double-PIN balance photoelectric detector | |
| CN109407020A (en) | A kind of magnetic axis measuring system of the solenoid coil based on suspension method | |
| CN101699585A (en) | Optical current transformer | |
| CN209296898U (en) | A kind of magnetic axis measuring system of solenoid coil | |
| CN208350216U (en) | Light quantum Quadrant detector fully differential equilibrium random number generator | |
| CN102914366A (en) | Photoelectric differential detector with high common-mode rejection ratio (CMRR) | |
| CN107764285B (en) | Photoelectric detection assembly power supply rejection ratio test system based on phase-locked amplifier | |
| US6690454B2 (en) | Method, apparatus and system for testing one or more waveguides of an optical device | |
| CN106370202A (en) | Online testing method and device for comprehensive performance of detector for gyroscope | |
| CN109709400A (en) | A kind of constant-current source circuit | |
| CN207556802U (en) | Laser optical detection circuit | |
| JP2996775B2 (en) | Optical magnetic field sensor | |
| CN220170355U (en) | Program controlled gain type photoelectric detector | |
| CN206146526U (en) | Optical universal meter control system | |
| CN207280928U (en) | A kind of anti-interference of stray light photodetector system based on digital servo-control | |
| CN203643337U (en) | Auto-balanced photoelectric detection device for photo-thermal detection | |
| CN218412268U (en) | Wavelength locking calibration-free laser gas remote measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |