CN104991205B - A kind of signal for magnetic induction image high-precision phase measurement encourages harvester and method - Google Patents
A kind of signal for magnetic induction image high-precision phase measurement encourages harvester and method Download PDFInfo
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Abstract
The invention discloses a kind of signal for magnetic induction image high-precision phase measurement to encourage harvester and method, device includes at least 16 excitation collectors, excitation collector is connected with collection amplifier, exciting amplifier respectively, collection amplifier is connected with variable connector 1, exciting amplifier is connected with variable connector 2, and excitation collector is also associated with power switch time schedule controller.The present invention is using collection each time and encourages, current excitations and acquisition electrode are completed this collection later while cut off the electricity supply, and excitation that two other electrode preheated during by gathering is gathered next time and acquisition function, often gather once while preheat two electrodes, solves the problems, such as an excitation coil is switched to reception by excitation non-uniform temperature after being continuously powered, measurement is affected by temperature smaller；Balanced to greatest extent energization heat so that phase drift is minimum.
Description
Technical field
The invention belongs to electromagnetic sensor technical field, is that one kind is used for magnetic induction image high-precision phase position specifically
The signal excitation harvester and method of measurement.
Background technology
High-precision magnetic induction image depends on high-precision phase measurement.And high-precision phase measurement is dependent on high-precision
Degree, the signal excitation of high stability and acquisition method.
All sensing drivings of traditional excitation acquisition system and collector are being encouraged and gathered and non-actuated, non-acquired
Any stage all be power-up.Chinese patent 201410260579.5 discloses a kind of high accuracy data for electrical impedance imaging
Acquisition system, just describe such system.
Due to the minimum 16 excitation collectors of general magnetic induction image measuring system, therefore static system power consumption is very
Greatly.One simple method is exactly to excitation and gathered according to measurement timing requirements, is just had when excitation and when collection
Power supply provides.But it is not all right just to switch on power when excitation and collection, because circuit needs from normal work is started to
Want certain stabilization time.It is exactly when next measurement sequential needs to encourage and the receipts of collection so typically using preheating means
Device is sent out, switch on power preheating in advance when upper one group of transceiver works, and power-up time length can equally influence high accuracy
The accuracy of signal acquisition.Each transceiver is thus needed to need a balanced preheating time.
The content of the invention
Cause system temperature drift to increase to solve to be mixed in the prior art, reduce system power dissipation and simplify the technology mesh of device
, the present invention propose a kind of static power consumption is low, transceiver use and preheat uniformly, power-up time it is reasonable, so as to obtain
High accuracy, the signal for magnetic induction image high-precision phase measurement of high stability encourage harvester.
In order to realize the purpose of the present invention, the present invention is achieved by the following technical solutions：
The invention discloses a kind of signal for magnetic induction image high-precision phase measurement to encourage harvester, device bag
Include at least 16 excitation collectors, excitation collector is connected with collection amplifier, exciting amplifier respectively, collection amplifier connection
There is variable connector 1, exciting amplifier is connected with variable connector 2, and excitation collector is also associated with power switch time schedule controller, electricity
Source switch time schedule controller includes power switch and variable connector 3, encourages and is provided with power switch between collector and power supply, institute
The power switch stated is connected with variable connector 3.
As a further improvement, the connection of variable connector 1 control collection amplifier of the present invention, variable connector 2 connect
Connect control exciting amplifier, the connection control power switch of variable connector 3.
The invention also discloses a kind of signal for magnetic induction image high-precision phase measurement to encourage acquisition method, excitation
Collector is laid out in a ring, and device controls the excitation being connected with each excitation collector by controlling variable connector 1,2,3
Amplifier, collection amplifier and power switch so that excitation collector is in excitation state, acquisition state, pre- Warm status or power-off
State, excitation state, acquisition state, pre- Warm status or off-position carry out sequential control by compartment equalization principle.
As a further improvement, excitation state of the present invention, which is variable connector 3, controls power switch connection, multichannel
The control exciting amplifier work of switch 2；Acquisition state is that variable connector 3 controls power supply connection, the control collection amplification of variable connector 1
Device works；Pre- Warm status is that variable connector 3 controls power supply connection, and exciting amplifier does not work with collection amplifier；Off-position
It is that power switch disconnects, exciting amplifier does not work with collection amplifier.
As a further improvement, excitation collector of the present invention is excitation coil or collection coil or preheating coil
Or power-off coil.
As a further improvement, it is electrode excitation and collection that compartment equalization principle of the present invention, which carries out sequential control,
Power-up sequence, including 3 coil electricities order and 4 coil electricities order.
As a further improvement, 3 coil electricity order of the present invention is that excitation collector number is i from 0 to 15
Number, excitation coil is carried out according to 3*i (MOD16) orders, and first collection coil number is i-3, and first preheating coil number is i+
3, it is collection coil that remaining, which is i as excitation coil, i+3n (MOD16), and i+3 (n+1) (MOD16) preheats coil.
As a further improvement, in 3 coil electricity order of the present invention, (such as 16) switch after often traversal collection
Exciting electrode, the interval of the excitation collector switched every time is 3 electrodes, and power switch is controlled simultaneously by variable connector 3
The quantity of connection is 3.
As a further improvement, 4 coil electricity order of the present invention is, current acquisition electrode numbering and electrode 0
At intervals of i, j (n) represents current measuring electrode number, and j (n+1) represents measuring electrode number next time：
J (n+1)=j (n)+5 (i=1,2)
J (n+1)=j (n)+7 (i=3,4,5)
J (n+1)=j (n)+2 (i=6)
J (n+1)=j (n)+3 (i=7,8)
Switching once excitation and acquisition electrode are gathered and encouraged each time, in the coil of excitation collector, is opened by multichannel
It is 4 to close 3 quantity for controlling power switch to connect simultaneously.
The advantageous effects of the present invention are as follows：
The invention discloses a kind of static power consumption is low, transceiver use and preheat uniformly, power-up time it is reasonable, so as to
The signal excitation harvester for magnetic induction image high-precision phase measurement of high accuracy, high stability is obtained, is traditional magnetic
Induced phase measurement proposes a transceiver preheating, excitation, the power switch time schedule controller of collection equilibrium assignment, sequential control
Device control processed only encourages and the electrode of collection is powered, and the mode of other transceivers power-off works, and disappears saving static power source
While consumption, keep measurement accuracy not to be influenced by temperature, keep the uniformity of measurement accuracy, reduce power consumption, it is possible to reduce be near
The quiescent current consumption of 87.5% transceiver.The method that taking any collection has the coil electricity preheating of identical quantity subtracts
Influence of the small temperature to measurement, solves the problems, such as the uniformity of excitation, ensure that all coils no matter as excitation or
Collection, preheating time are identicals, and the working time is also identical, current excitations electrode and last exciting electrode and next
The space interval of secondary exciting electrode is also identical.Further, using collection each time and excitation, current excitations and collection
Electrode is completed after this collection while cut off the electricity supply, and what two other electrode preheated during by gathering was gathered next time
Excitation and acquisition function, often gather once while preheat two electrodes, complete collection and switch (once) excitation simultaneously later and adopt
4 coil electricity sequential grammars of colelctor electrode, solve and the temperature received is switched to not by excitation after an excitation coil is continuously powered
Uniformity problem, measurement are affected by temperature smaller；Balanced to greatest extent energization heat so that phase drift is minimum.
Brief description of the drawings
Fig. 1 is the control structure schematic diagram of n-th of excitation collector of technical solution of the present invention；
Fig. 2 is the overall hardware architecture diagram of technical solution of the present invention device.
Embodiment
The invention discloses a kind of signal for magnetic induction image high-precision phase measurement to encourage harvester, and Fig. 1 is
The control structure schematic diagram of n-th of excitation collector of technical solution of the present invention；Device includes 16 excitation collectors, excitation is adopted
Storage is connected with collection amplifier, exciting amplifier respectively, and collection amplifier is connected with variable connector 1, exciting amplifier connection
There is variable connector 2, excitation collector is also associated with power switch time schedule controller, and power switch time schedule controller is opened including power supply
Pass and variable connector 3, encourage and be provided with power switch between collector and power supply, described power switch is connected with variable connector
3.The connection control collection amplifier of variable connector 1, the connection control exciting amplifier of variable connector 2, the connection control electricity of variable connector 3
Source switch.
Fig. 2 is the overall hardware architecture diagram of technical solution of the present invention device, and one kind is used for magnetic induction image high accuracy
The signal excitation acquisition method of phase measurement, excitation collector are laid out in a ring, and device is by controlling variable connector 1,2,3 to control
Make exciting amplifier, collection amplifier and the power switch being connected with each excitation collector so that excitation collector is in swash
State, acquisition state, pre- Warm status or off-position are encouraged, excitation state, acquisition state, pre- Warm status or off-position are by space
Homeostatic principle carries out sequential control, and excitation state is that variable connector 3 controls power switch connection, and variable connector 2 controls excitation to put
Big device work；Acquisition state is that variable connector 3 controls power supply connection, the control collection amplifier operation of variable connector 1；Pre- Warm status
It is that variable connector 3 controls power supply connection, exciting amplifier does not work with collection amplifier；Off-position is that power switch disconnects,
Exciting amplifier does not work with collection amplifier.Excitation collector can be excitation coil or collection coil or preheating coil or disconnected
Electric coil.
Compartment equalization principle, which carries out sequential control, to be electrode excitation and gathers power-up sequence, including 3 coil electricities order and 4
Coil electricity order.3 coil electricities order is, excitation collector number be i from 0 to No. 15, excitation coil is according to 3*i (MOD16)
Order is carried out, and first collection coil number is i-3, and first preheating coil number is i+3, and remaining is i as excitation coil, i+3n
(MOD16) coil is preheated for collection coil, i+3 (n+1) (MOD16), once excitation is electric for (such as 16) switching after often traversal collection
Pole, the interval of the excitation collector switched every time is 3 electrodes, the quantity for controlling power switch to connect simultaneously by variable connector 3
It is 3.
4 coil electricities order is to gather and encourage switching once excitation and acquisition electrode each time, in excitation collector
In coil, the quantity for controlling power switch to connect simultaneously by variable connector 3 is 4.
Existing magnetic induction image method does not all refer to the power consumption problem of signal transceiver excitation and collection.And signal
Excitation and acquisition order are all based on natural order, have 0-15 excitation coil, then No. 0 coil stimulating, 1-15 (F) is sequentially adopted
Collection.Line 1 circle encourages, 2-15 (F), 0 acquisition order, the like.But so, it is necessary to the excitation of electrode and Acquisition Circuit
There is a temperature stabilization process after being powered, otherwise measurement will appear from larger error.
Two problems of power consumption and preheating are reduced in order to balance, using the method for three coil energizations, exactly when No. 0 coil leads to
Electric excitation, when the energization of Line 1 circle gathers, next collection No. 2 coils of coil start to preheat；And when No. 0 coil electricity swashs
Encourage, when No. 2 coil electricities gather, next No. 3 coil electricities preheatings of collection coil.Reduction system work(is thus taken into account
Consume and ensure Acquisition Circuit thermostabilization simultaneously.So each excitation collector just has 3 control terminals, when MUX1 (variable connector 1)
When effective, the transceiver is operated in acquisition state；When MUX2 (variable connector 2) is effective, the transceiver is operated in
Excitation state；And encourage whether collector can work, it is decided by whether power switch MUX3 (variable connector 3) is effective.We
It is assumed that 0 is invalid, 1 is effective, then the working condition of an excitation collector is as follows：
So each excitation collector just has four states, that is, power-off, preheating, excitation, collection.
However, when due to No. 0 coil stimulating, it is powered always within the time of other 15 acquisition orders；System
When No. 1 is transformed into as excitation, the temperature of No. 0 coil will have the problem of temperature is inconsistent with other coils.Meanwhile when
After last collection coil of No. 0 coil stimulating is completed, system shifts as No. 0 excitation that is powered in sequence, and No. 15 logical
Electricity collection, preheating of the Line 1 circle energization as next excitation coil, No. 2 coil electricities are as collection coil preheating.It is so logical
The uniformity of normal 3 groups of coil electricities is broken, and equally causes systematic error.
In order to solve the consistency problem of excitation, it is necessary to assure no matter all coils are as excitation or collection, preheating
Time is identical；Working time is also identical, for the uniformity of conduction time for ensureing to preheat and working, while to be protected
Demonstrate,prove electrode traversal and the minimum that influences each other.
Traditional electrode encourages and collection power-up sequence table is as follows
An=(i, j)；
I=(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15)
J=(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15) (i ≠ j, n=1-240)
Due to i ≠ j, therefore 16X15 totally 240 measurement data, it is shown in Table one.Level representation excitation coil order in table, hangs down
It is straight to represent collection coil sequence.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | |
| 0 | 16 | 31 | 46 | 61 | 76 | 91 | 106 | 121 | 136 | 151 | 166 | 181 | 196 | 211 | 226 | |
| 1 | 1 | 32 | 47 | 62 | 77 | 92 | 107 | 122 | 137 | 152 | 167 | 182 | 197 | 212 | 227 | |
| 2 | 2 | 17 | 48 | 63 | 78 | 93 | 108 | 123 | 138 | 153 | 168 | 183 | 198 | 213 | 228 | |
| 3 | 3 | 18 | 33 | 64 | 79 | 94 | 109 | 124 | 139 | 154 | 169 | 184 | 199 | 214 | 229 | |
| 4 | 4 | 19 | 34 | 49 | 80 | 95 | 110 | 125 | 140 | 155 | 170 | 185 | 200 | 215 | 230 | |
| 5 | 5 | 20 | 35 | 50 | 65 | 96 | 111 | 126 | 141 | 156 | 171 | 186 | 201 | 216 | 231 | |
| 6 | 6 | 21 | 36 | 51 | 66 | 81 | 112 | 127 | 142 | 157 | 172 | 187 | 202 | 217 | 232 | |
| 7 | 7 | 22 | 37 | 52 | 67 | 82 | 97 | 128 | 143 | 158 | 173 | 188 | 203 | 218 | 233 | |
| 8 | 8 | 23 | 38 | 53 | 68 | 83 | 98 | 113 | 144 | 159 | 174 | 189 | 204 | 219 | 234 | |
| 9 | 9 | 24 | 39 | 54 | 69 | 84 | 99 | 114 | 129 | 160 | 175 | 190 | 205 | 220 | 235 | |
| 10 | 10 | 25 | 40 | 55 | 70 | 85 | 100 | 115 | 130 | 145 | 176 | 191 | 206 | 221 | 236 | |
| 11 | 11 | 26 | 41 | 56 | 71 | 86 | 101 | 116 | 131 | 146 | 161 | 192 | 207 | 222 | 237 | |
| 12 | 12 | 27 | 42 | 57 | 72 | 87 | 102 | 117 | 132 | 147 | 162 | 177 | 208 | 223 | 238 | |
| 13 | 13 | 28 | 43 | 58 | 73 | 88 | 103 | 118 | 133 | 148 | 163 | 178 | 193 | 224 | 239 | |
| 14 | 14 | 29 | 44 | 59 | 74 | 89 | 104 | 119 | 134 | 149 | 164 | 179 | 194 | 209 | 240 | |
| 15 | 15 | 30 | 45 | 60 | 75 | 90 | 105 | 120 | 135 | 150 | 165 | 180 | 195 | 210 | 225 |
It will be seen that before in order to ensure next data acquisition, circuit has been powered table 1, then in preceding 1-15 lines
When circle collection, next coil can preheat.But when excitation coil change (being transformed into next column from a row every time)
Wait, such as after the 30th collection completion of excitation 15 of data 1, the 31st data acquisition needs No. 2 excitations and No. 0 collection.
Therefore, it is necessary to simultaneously to No. 2 and No. 0 coil electricity preheating when Line 1 circle encourages No. 15 coil collections.At this moment just have
15th, 0,1,2 four coil electricity.And during normal acquisition, only 3 coils need to be powered.This imbalance will cause phase
The error of measurement.The method that this patent takes any collection and has the coil electricity preheating of identical quantity reduces temperature to measurement
Influence.
Using the excitation and collection of 3 coil electricities simultaneously 2 are shown in Table according to the acquisition order table at interval 3.In order to ensure most
Limits uniformly influence each other, first by excitation order according to odd number (such as 3,5,7, because 16 coils loops are laid out, 9,
11st, 13 and 3,5,7 is equivalent) interval.
For example with the excitation acquisition method at interval 3, coil i is from 0 to No. 15, then excitation coil is suitable according to 3*i (MOD16)
Sequence is carried out, namely the order of excitation coil is 0, and 3,6,9,12,15,2,5,8,11,14, Isosorbide-5-Nitrae, 7,10,13.
The operation order of coil is gathered then according to for each excitation coil j, first collection coil number is j-3,
First preheating coil number is j+3；And other are then j excitations, j+3n (MOD16) is gathered, j+3 (n+1) (MOD16) preheatings.
Such as No. 8 coils, j=8；0th collection coil of No. 8 coil stimulatings is exactly 8-3=5 coils, and pre-
Heat coil number is then 8+3=11 coils.1st collection coil is exactly 8+3=11；It is then No. 8+3*2=14 to preheat coil number
Coil；2nd collection coil is 8+3*2=14, and preheating coil is then 8+3*3=17 (MOD16)=1.The like.
Table 2 is excitation, collection and the data acquisition sequence table for preheating coil spacing 3
| 0 | 3 | 6 | 9 | 12 | 15 | 2 | 5 | 8 | 11 | 14 | 1 | 4 | 7 | 10 | 13 | |
| 13 | 1 | 30 | 44 | 58 | 72 | 86 | 100 | 114 | 128 | 142 | 156 | 170 | 184 | 198 | 212 | |
| 0 | 16 | 45 | 59 | 73 | 87 | 101 | 115 | 129 | 143 | 157 | 171 | 185 | 199 | 213 | 227 | |
| 3 | 2 | 31 | 60 | 74 | 88 | 102 | 116 | 130 | 144 | 158 | 172 | 186 | 200 | 214 | 228 | |
| 6 | 3 | 17 | 46 | 75 | 89 | 103 | 117 | 131 | 145 | 159 | 173 | 187 | 201 | 215 | 229 | |
| 9 | 4 | 18 | 32 | 61 | 90 | 104 | 118 | 132 | 146 | 160 | 174 | 188 | 202 | 216 | 230 | |
| 12 | 5 | 19 | 33 | 47 | 76 | 105 | 119 | 133 | 147 | 161 | 175 | 189 | 203 | 217 | 231 | |
| 15 | 6 | 20 | 34 | 48 | 62 | 91 | 120 | 134 | 148 | 162 | 176 | 190 | 204 | 218 | 232 | |
| 2 | 7 | 21 | 35 | 49 | 63 | 77 | 106 | 135 | 149 | 163 | 177 | 191 | 205 | 219 | 233 | |
| 5 | 8 | 22 | 36 | 50 | 64 | 78 | 92 | 121 | 150 | 164 | 178 | 192 | 206 | 220 | 234 | |
| 8 | 9 | 23 | 37 | 51 | 65 | 79 | 93 | 107 | 136 | 165 | 179 | 193 | 207 | 221 | 235 | |
| 11 | 10 | 24 | 38 | 52 | 66 | 80 | 94 | 108 | 122 | 151 | 180 | 194 | 208 | 222 | 236 | |
| 14 | 11 | 25 | 39 | 53 | 67 | 81 | 95 | 109 | 123 | 137 | 166 | 195 | 209 | 223 | 237 | |
| 1 | 12 | 26 | 40 | 54 | 68 | 82 | 96 | 110 | 124 | 138 | 152 | 181 | 210 | 224 | 238 | |
| 4 | 13 | 27 | 41 | 55 | 69 | 83 | 97 | 111 | 125 | 139 | 153 | 167 | 196 | 225 | 239 | |
| 7 | 14 | 28 | 42 | 56 | 70 | 84 | 98 | 112 | 126 | 140 | 154 | 168 | 182 | 211 | 240 | |
| 10 | 15 | 29 | 43 | 57 | 71 | 85 | 99 | 113 | 127 | 141 | 155 | 169 | 183 | 197 | 226 |
The every 16 collections exciting electrode of switching of 3 coil electricity schemes that table two proposes, the interval switched every time is 3
Electrode, balanced energization preheating time, it is adapted to higher in system power dissipation requirement, measurement accuracy requires less high occasion.Cause
For in 16 collection, an exciting electrode is powered all the time.
If solve the problems, such as an excitation coil it is continuous 15 times be powered after by excitation switch to receive non-uniform temperature with
Afterwards, be affected by temperature will be smaller for measurement.It is exactly to gather and encourage each time switching once excitation and acquisition electrode, here it is this
The 4 coil electricity methods that patent proposes.Such as table 3.
Because number of electrodes is 16 cycle arrangements, thus the electrode gap on the basis of 0 be 11 and 15,2 at intervals of 2
With 14,3 at intervals of 3 and 13,4 at intervals of 4 and 12,5 at intervals of 5 and 11,6 at intervals of 6 and 10, at intervals of 77 Hes
9 be identical.Therefore we only need processing 1,2,3,4,5,6,7,8 kind of situation.Because total number of electrodes is 16, therefore works as electrode
When the difference odd number of excitation interval, 16 electrodes can be continuously traveled through.So 3,5,7 electrode gaps can only be used
Difference.Simultaneously so that the powered electrode interval gathered twice is as balanced as possible.
Table 3 is the 4 electrode energization equalizations excitation acquisition order that once sampling switches an exciting electrode, to greatest extent
Balanced energization heat so that phase drift is minimum.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | |
| 0 | 17 | 49 | 81 | 113 | 145 | 177 | 209 | 233 | 196 | 166 | 142 | 101 | 76 | 39 | 4 | |
| 1 | 1 | 30 | 62 | 88 | 120 | 152 | 185 | 220 | 228 | 207 | 174 | 133 | 108 | 67 | 36 | |
| 2 | 33 | 14 | 27 | 59 | 95 | 127 | 159 | 178 | 215 | 239 | 202 | 167 | 140 | 99 | 74 | |
| 3 | 65 | 46 | 11 | 24 | 56 | 86 | 118 | 150 | 186 | 210 | 234 | 197 | 175 | 131 | 106 | |
| 4 | 97 | 72 | 43 | 8 | 21 | 53 | 93 | 125 | 157 | 179 | 221 | 229 | 208 | 168 | 138 | |
| 5 | 129 | 104 | 79 | 40 | 5 | 18 | 50 | 84 | 116 | 148 | 187 | 216 | 240 | 203 | 176 | |
| 6 | 161 | 136 | 111 | 70 | 37 | 2 | 31 | 63 | 91 | 123 | 155 | 180 | 211 | 235 | 198 | |
| 7 | 193 | 169 | 143 | 102 | 77 | 34 | 15 | 28 | 60 | 82 | 114 | 146 | 188 | 222 | 230 | |
| 8 | 225 | 204 | 162 | 134 | 109 | 68 | 47 | 12 | 25 | 57 | 89 | 121 | 153 | 181 | 217 | |
| 9 | 212 | 236 | 199 | 170 | 141 | 100 | 75 | 44 | 9 | 22 | 54 | 96 | 128 | 160 | 189 | |
| 10 | 182 | 223 | 231 | 194 | 163 | 132 | 107 | 66 | 41 | 6 | 19 | 51 | 87 | 119 | 151 | |
| 11 | 158 | 190 | 218 | 226 | 205 | 171 | 139 | 98 | 73 | 38 | 3 | 32 | 64 | 94 | 126 | |
| 12 | 117 | 149 | 183 | 213 | 237 | 200 | 164 | 130 | 105 | 80 | 35 | 16 | 29 | 61 | 85 | |
| 13 | 92 | 124 | 156 | 191 | 224 | 232 | 195 | 172 | 137 | 112 | 71 | 48 | 13 | 26 | 58 | |
| 14 | 55 | 83 | 115 | 147 | 184 | 219 | 227 | 206 | 165 | 144 | 103 | 78 | 45 | 10 | 23 | |
| 15 | 20 | 52 | 90 | 122 | 154 | 192 | 214 | 238 | 201 | 173 | 135 | 110 | 69 | 42 | 7 |
Assuming that current acquisition electrode is numbered with electrode 0 at intervals of i, j (n) represents current measuring electrode number, j (n+1) generations
Table measuring electrode number next time, then have：
J (n+1)=j (n)+5 (i=1,2)
J (n+1)=j (n)+7 (i=3,4,5)
J (n+1)=j (n)+2 (i=6)
J (n+1)=j (n)+3 (i=7,8)
Such as during i=1, the current exciting electrode number that measures is j (0)=0, then j (1)=j (0)+5=5；Because i=1, institute
It is 1, j (1)=j (0)+5=1+5=6 with acquisition electrode number；And gather next time, exciting electrode number be then changed into j (2)=j (1)+
5=5+5=10；Acquisition electrode is changed into 11.Because electrode cycle arranges, therefore still need MOD16 computings, exactly when numerical value surpasses
Cross 15 zeros.Such as j (3)=15,16；Due to MOD16 computings, just it is changed into exciting electrode number 15, acquisition electrode number 0.
One special circumstances is the excitation acquisition order at interval 6, all due to can not once be traveled through as other intervals
Electrode pair, thus use and travel through twice.(0,6) travels through once according to formula for the first time, and then according still further to (1,7), preheating increases every time
Measure as 2, then travel through once.
Above-described is only the preferred embodiment of the present invention, and the present invention is not limited to above example, this area skill
The oher improvements and changes that art personnel directly export or associated without departing from the spirit and concept in the present invention, all should
Think comprising within the scope of the present invention.
Claims (7)
1. a kind of signal for magnetic induction image high-precision phase measurement encourages acquisition method, it is characterised in that described side
Method encourages harvester to realize based on signal, and described device includes at least 16 excitation collectors, described excitation gathers
Device is connected with collection amplifier, exciting amplifier respectively, and described collection amplifier is connected with variable connector 1, described excitation
Amplifier is connected with variable connector 2, and described excitation collector is also associated with power switch time schedule controller, and described power supply is opened
Closing time schedule controller includes power switch and variable connector 3, and power switch is provided between described excitation collector and power supply,
Described power switch is connected with variable connector 3, and described excitation collector is laid out in a ring, and described device is more by controlling
Way switch 1,2,3 controls exciting amplifier be connected with each excitation collector, gathers amplifier and power switch so that
Excitation collector is in excitation state, acquisition state, pre- Warm status or off-position, described excitation state, acquisition state, preheating
State or off-position carry out sequential control by compartment equalization principle.
2. the signal according to claim 1 for magnetic induction image high-precision phase measurement encourages acquisition method, it is special
Sign is that described excitation state is that variable connector 3 controls power switch connection, and variable connector 2 controls exciting amplifier work；
Described acquisition state is that variable connector 3 controls power supply connection, the control collection amplifier operation of variable connector 1；Described preheating
State is that variable connector 3 controls power supply connection, and exciting amplifier does not work with collection amplifier；Off-position is that power switch breaks
Open, exciting amplifier does not work with collection amplifier.
3. the signal according to claim 2 for magnetic induction image high-precision phase measurement encourages acquisition method, it is special
Sign is that described excitation collector is excitation coil or collection coil or preheating coil or power-off coil.
4. the signal according to claim 2 for magnetic induction image high-precision phase measurement encourages acquisition method, it is special
Sign is that described compartment equalization principle, which carries out sequential control, to be electrode excitation and gather power-up sequence, including 3 coil electricities are suitable
Sequence and 4 coil electricities order.
5. the signal according to claim 4 for magnetic induction image high-precision phase measurement encourages acquisition method, it is special
Sign is, 3 coil electricities order is, from 0 to No. 15, excitation coil is carried out coil i according to 3*i (MOD16) orders, gathers coil
Operation order be according to for each excitation coil j, first collection coil number is j-3, first preheating coil number
It is j+3, other are coil j excitations, and coil j+3n (MOD16) is gathered, coil j+3 (n+1) (MOD16) preheatings.
6. the signal according to claim 5 for magnetic induction image high-precision phase measurement encourages acquisition method, it is special
Sign is, in 3 described coil electricity orders, switches an exciting electrode after often traversal collection, the excitation collection switched every time
The interval of device is 3 electrodes, and the quantity for controlling power switch to connect simultaneously by variable connector 3 is 3.
7. the signal according to claim 4 for magnetic induction image high-precision phase measurement encourages acquisition method, it is special
Sign is that 4 coil electricities order is that for current acquisition electrode numbering with electrode 0 at intervals of i, j (n) represents current measuring electrode
Number, j (n+1) represents measuring electrode number next time：
J (n+1)=j (n)+5 (i=1,2)
J (n+1)=j (n)+7 (i=3,4,5)
J (n+1)=j (n)+2 (i=6)
J (n+1)=j (n)+3 (i=7,8)
Switching once excitation and acquisition electrode are gathered and encourage each time, it is same by variable connector 3 in the coil of excitation collector
When control power switch connection quantity be 4.
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Denomination of invention: A signal excitation acquisition device and method for high-precision phase measurement in magnetic induction imaging Granted publication date: 20180109 Pledgee: Bank of Jiangsu Limited by Share Ltd. Hangzhou branch Pledgor: HANGZHOU YONGCHUAN TECHNOLOGY Co.,Ltd. Registration number: Y2024980014274 |