CN207007913U - Suitable for the automation resonant capacitance adaptation of Three-Dimensional Magnetic characteristic measuring system - Google Patents
Suitable for the automation resonant capacitance adaptation of Three-Dimensional Magnetic characteristic measuring system Download PDFInfo
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- CN207007913U CN207007913U CN201720388703.5U CN201720388703U CN207007913U CN 207007913 U CN207007913 U CN 207007913U CN 201720388703 U CN201720388703 U CN 201720388703U CN 207007913 U CN207007913 U CN 207007913U
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Abstract
The utility model is a kind of automation resonant capacitance adaptation suitable for Three-Dimensional Magnetic characteristic measuring system.The automation resonant capacitance adaptation includes three electric capacity adaptations and single chip control unit；Described electric capacity adaptation includes n elementary cell in parallel, and each elementary cell includes an electric capacity, an electronic switch and two single-pole double-throw switch (SPDT)s；Wherein, i.e., electronic switch is connected with electric capacity, and the other end of electronic switch is connected with the fixed point of the first single-pole double-throw switch (SPDT), and the fixed point of the other end of electric capacity and the second single-pole double-throw switch (SPDT) is connected；Each single-pole double-throw switch (SPDT) has two movable contacts.The utility model, which devises one kind and can automated, realizes the series-parallel circuit connecting method of electric capacity, can neatly control the connection in series-parallel of electric capacity, it is not necessary to artificial intervention.
Description
Technical field：
The magnetic characteristic test equipment of soft magnetic materials is the utility model is related to, it is humorous suitable for three-dimensional magnetic characteristic flexibility excitation system
The electric capacity that shakes automation matching, can be achieved it is different it is excitatory under the conditions of resonant capacitance accurate calculating and match and simplify manually calculating and
Operating process.
Background technology：
The Three-Dimensional Magnetic specialty systemizations of soft magnetic materials can measure the magnetic characteristics such as magnetic hysteresis, the loss of material comprehensively.Three-Dimensional Magnetic is special
Property test system mainly include the orthogonal main measurement apparatus of three axles, high performance power amplifier, multichannel differential amplifier circuit, number
The structures such as word signal processing unit.Three-dimensional tester main magnetic circuit is made up of orthogonal space magnetic pole, yoke, is the important of excitation system
Part.Excitatory part relies primarily on power amplifier and excited signal is amplified, and excitatory electricity is produced on magnetizing coil
Stream, produce magnetic field and complete magnetic characteristic measurement.It is excitatory with the rise of experiment magnet excitation frequency because excited signal is alternating signal
Coil impedance increases, and causes excitatory difficulty, relies solely on that power amplifier is excitatory to reduce power-efficient, and power factor is smaller.In order to mend
The reactive current of magnetizing coil is repaid, there is provided the resonance matching capacitance of different size.
Existing test system, it is necessary to close system power supply, according to coil inductance and swashs when carrying out specific frequency measurement
Magnet rate matches resonant capacitance accordingly to calculate, and is then operated with manual switches again to select corresponding capacitance, both cumbersome
Conventional efficient is substantially reduced again.Traditional resonant capacitor (i.e. electric capacity adaptation) structural representation is as shown in figure 1, be multiple bases
This unit composes in parallel, and each elementary cell is in series by electric capacity A and plectrum switch B, and whether control electric capacity accesses parallel connection
Circuit., it is necessary to stir corresponding switch when needing to use corresponding capacitance in experimentation, the electric capacity parallel connection of different size is risen
Come, experiment could be completed.This capacitive will calculate when choosing electric capacity every time needs electric capacity in parallel；In circuit structure
On, all electric capacity can only be in parallel, limits the scope of equivalent capacitance value；Outside need sets toggle switch, automaticity
It is not high, influence conventional efficient.Therefore, novel automatic capacitive resonance adaptation is designed and produced for saving experimental period, simplification
Experimental procedure, lifting conventional efficient are significant.
Utility model content
The shortcomings that the purpose of this utility model is for traditional matching resonant capacitance case, there is provided one kind is applied to Three-Dimensional Magnetic
The automation resonant capacitance adaptation of characteristic measuring system.The utility model is on the basis of traditional capacitive, by plectrum
Switch is changed to electronic switch, increases an oblique electric capacity series via between adjacent capacitor, and set up two electronic switches
Adjacent electric capacity is controlled, electronic switch signal is provided by single-chip microcomputer, control electric current flow direction, can be connected so as to reach electric capacity,
And can purpose in parallel.
The technical solution of the utility model is：
A kind of automation resonant capacitance adaptation suitable for Three-Dimensional Magnetic characteristic measuring system, the automation resonant capacitance
The composition of orchestration includes three electric capacity adaptations and single-chip microcomputer；
Wherein, three electric capacity adaptations are connected with single-chip microcomputer respectively,
Described electric capacity adaptation includes n elementary cell in parallel, and each elementary cell includes an electric capacity, an electricity
Sub switch and two single-pole double-throw switch (SPDT)s；Wherein, i.e., electronic switch is connected with electric capacity, the other end of electronic switch and the first hilted broadsword
The fixed point of commutator is connected, and the fixed point of the other end of electric capacity and the second single-pole double-throw switch (SPDT) is connected；Each single-pole double throw
Switch has two movable contacts；
The parallel connection of n described elementary cell is specially：Second movable contact of the first single-pole double-throw switch (SPDT) of kth level is with
First single-pole double-throw switch (SPDT) fixed point of one-level is connected, the first movable contact and next stage of the first single-pole double-throw switch (SPDT) of kth level
First movable contact of the second single-pole double-throw switch (SPDT) is connected；The second movable contact and upper level of second single-pole double-throw switch (SPDT) of kth level
The fixed point of the second single-pole double-throw switch (SPDT) be connected, the first movable contact of the second single-pole double-throw switch (SPDT) of kth level and upper level the
First movable contact of one single-pole double-throw switch (SPDT) is connected；Meanwhile first elementary cell be not provided with the second single-pole double-throw switch (SPDT), the first base
The other end of electric capacity A1 in this unit is connected with the second movable contact in the second single-pole double-throw switch (SPDT) in the second elementary cell,
And connect a lead-out terminal E1；Be not provided with the first single-pole double-throw switch (SPDT) in afterbody elementary cell, electronic switch it is another
The second movable contact in the first single-pole double-throw switch (SPDT) during end is more with upper level elementary cell is connected, and connects a lead-out terminal
E2；E1, E2 distinguish resonant inductance group and are connected；
Described n=4~12, k are less than n；
In described elementary cell, electronic switch is depletion type N-channel MOS pipe, and the source electrode of metal-oxide-semiconductor is connected with electric capacity, leakage
Pole is connected with the fixed point of the first single-pole double-throw switch (SPDT), and the grid of NMOS tube is drawn signal wire and is connected with single-chip microcomputer；
Described single-pole double-throw switch (SPDT) is identical, is the electronic chip with single-pole double-throw switch (SPDT) function, and the chip has
At least 6 terminals；Wherein, three terminals are respectively as fixed point, the first movable contact and the second movable contact；Second single-pole double throw
Switch chip forth terminal is connected with the forth terminal of the first single-pole double-throw switch (SPDT) chip of upper level, and draws as signal wire
Dk, Dk are connected with single-chip microcomputer.
Described single-pole double-throw switch (SPDT) is MAX4644 chips.
The beneficial effects of the utility model are：
(1) the utility model can realize that computer data communicates with slave computer and controls the change of resonant capacitance value, from
Dynamicization degree is high, can greatly reduce the amount of labour and simplify electric capacity calculating.
(2) compared to traditional resonant capacitance adaptation, it is necessary to close system, again when carrying out different experiments every time
Change the connection method of resonant capacitance circuit.The utility model does not need equipment to temporarily cease operation, can be in experimentation
Switch resonant capacitance, ensure that the continuity of experiment.
(3) the utility model, which devises one kind and can automated, realizes the series-parallel circuit connecting method of electric capacity, Neng Gouling
The connection in series-parallel of electric capacity is controlled livingly, it is not necessary to artificial intervention.
(4) the utility model can obtain more than 100 and plant equivalent capacitance, expand magnetic characteristic survey by the connection in series-parallel of electric capacity
The range of choice of resonant frequency in amount, magnetic characteristic experiment is set there are more resonant capacitances to select in intermediate frequency range.Both improved
Resonance precision, experimental cost has been saved again, and simplify artificial calculate and operating process.
Brief description of the drawings
Fig. 1 a are traditional electric capacity adaptation connection unit；Fig. 1 b are that traditional electric capacity adaptation circuit connecting mode is illustrated
Figure
Fig. 2 a are the electric capacity adaptation connection unit of this patent；Fig. 2 b are the electric capacity adaptation circuit connecting mode of this patent
Schematic diagram；
Fig. 3 is the switching signal connected mode schematic diagram of the electric capacity adaptation controlled switch of this patent；
Fig. 4 is 40uF equivalent capacitance switch motion schematic diagrames；
Fig. 5 is kth level elementary cell physical circuit connection diagram；
Fig. 6 a are MAX4644 timing control signals；Fig. 6 b are MAX4644 chip pin figures；
Fig. 7 is Three-Dimensional Magnetic characteristic measuring system and this patent connection diagram；
Fig. 8 is the operation for the automation resonant capacitance adaptation for being applied to Three-Dimensional Magnetic characteristic measuring system in the utility model
Block diagram.
Embodiment：
Automation resonant capacitance adaptation of the present utility model suitable for Three-Dimensional Magnetic characteristic measuring system, electric capacity matching
Device is that it is formed substantially.Electric capacity adaptation in the utility model is to be improved the elementary cell of traditional adaptation,
As shown in Figure 2 a, plectrum switch B is changed to controllable electronic switch Bk, and increases by two single-pole double throws of single-pole double-throw switch (SPDT) first
Switch Ck1, the second single-pole double-throw switch (SPDT) Ck2 (are named as the first single-pole double throw to open with the switch B single-pole double-throw switch (SPDT)s being joined directly together
Close Ck1, be named as the second single-pole double-throw switch (SPDT) Ck2 with the electric capacity Ak single-pole double-throw switch (SPDT)s being joined directly together), i.e. electronic switch Bk with
Electric capacity Ak connects, and the electronic switch Bk other end is connected with the first single-pole double-throw switch (SPDT) Ck1 fixed point, and electric capacity Ak's is another
End is connected with the second single-pole double-throw switch (SPDT) Ck2 fixed point, thus the resonant capacitance adaptation described in one this patent of composition
Elementary cell.Two movable contacts to the first single-pole double-throw switch (SPDT) Ck1, the second single-pole double-throw switch (SPDT) Ck2 are respectively designated as first
Movable contact 1, the second movable contact 2.
By n elementary cell, parallel connection can complete the electric capacity connection in series-parallel control of this patent in the way of as shown in figure 2b
Circuit (electric capacity adaptation)：First single-pole double-throw switch (SPDT) Ck1 of kth level the second movable contact and the first hilted broadsword of next stage are double
The fixed points of throw switch C (k+1) 1 are connected, and the first single-pole double-throw switch (SPDT) Ck1 of kth level the first movable contact and next stage second is single
Double-pole double throw switch C (k+1) 2 the first movable contact is connected；Second single-pole double-throw switch (SPDT) Ck2 of kth level the second movable contact with it is upper
Second single-pole double-throw switch (SPDT) C (k-1) 2 of one-level fixed point is connected, and the first of the second single-pole double-throw switch (SPDT) Ck2 of kth level is dynamic
Contact is connected with upper level the first single-pole double-throw switch (SPDT) C (k-1) 1 the first movable contact；Meanwhile the second single-pole double throw of the first order
Switch C12 to remove, the other end of the electric capacity A1 in the first elementary cell (connects relative to electronic switch B1 in this elementary cell
Connect the other end at end) it is connected with the second movable contact 2 in the second single-pole double-throw switch (SPDT) in the second elementary cell, and connect one
Lead-out terminal E1, as equivalent capacitance output pin；The the first single-pole double-throw switch (SPDT) Cn1, electronic switch Bn that afterbody omits
The other end and upper level elementary cell it is more in the first single-pole double-throw switch (SPDT) in the second movable contact 2 be connected, and connection one
Lead-out terminal E2, as equivalent capacitance output pin；(E1 connects No. 4 pins of the single-pole double-throw switch (SPDT) of second level unit second.E2 connects
No. 4 pins of N-1 levels the first single-pole double-throw switch (SPDT) of unit.) thus complete electric capacity series parallel switch control circuit.
The quantity of described elementary cell can be 4~12.The utility model is preferably 8.
Described single-pole double-throw switch (SPDT) uses the electronic chip with single-pole double-throw switch (SPDT) function, and the chip has at least 6
Individual terminal；The utility model uses MAX4644 chips as single-pole double-throw switch (SPDT), wherein, Fig. 6 b are the pins of chip, and No. 2 are drawn
Pin, No. 3 pins are chip power supply pin, and it is double that No. 4 pins correspond to the first single-pole double-throw switch (SPDT) Ck1 described above, the second hilted broadsword
Throw switch Ck2 2, No. 6 pins of the second movable contact correspond to the first single-pole double-throw switch (SPDT) Ck1, the second single-pole double-throw switch (SPDT) Ck2
First pin of movable contact 1,5 correspond to the first single-pole double-throw switch (SPDT) Ck1, the second single-pole double-throw switch (SPDT) Ck2 fixed point, No. 1
Pin is the control signal input pin of single-pole double-throw switch (SPDT) Ck1, Ck2 in resonant capacitance adaptation elementary cell described above.
In kth level elementary cell, the chip corresponding to the first single-pole double-throw switch (SPDT) Ck1 is the first single-pole double-throw switch (SPDT) chip Ck1, right
Should be the second single-pole double-throw switch (SPDT) chip Ck2 in the second single-pole double-throw switch (SPDT) Ck1 chip.When control signal output is low level
(i.e. MAX4644 No. 1 pin input is low level), the fixed point of single-pole double-throw switch (SPDT) and second when (logical value 0)
Movable contact 2 turns on, the first movable contact 1 hanging (i.e. MAX4644 No. 5 pins turn on No. 4 pins, and No. 6 pins are hanging)；Work as control
(i.e. MAX4644 No. 1 pin input is high level), single-pole double throw when signal output processed is high level (logical value 1)
The fixed point of switch turns on the first movable contact 1, and the second movable contact 2 vacantly (i.e. with No. 6 pins lead by MAX4644 No. 5 pins
Logical, No. 4 pins are hanging)).No. 1 pin of the second single-pole double-throw switch (SPDT) chip Ck2 in kth level elementary cell and upper level
First single-pole double-throw switch (SPDT) chip Ck1 No. 1 pin is connected, and draws the series control signal wire Dk as minimum bit.
Described electronic switch Bk is made up of depletion type N-channel MOS pipe (NMOS tube), and source electrode is connected with electric capacity, drain electrode with
First single-pole double-throw switch (SPDT) chip Ck1 fixed point (No. 5 pins) is connected, and the grid of NMOS tube draws signal wire as Fk, with
The pin of single-chip microcomputer is connected.The minimum Parallel Control position of Bk switches is formed into F1-F8 Parallel Controls letter according to number order side by side
Number line, F1-F8 shunt control signals line access single-chip microcomputer PA0-PA7 pins.When Fk control signal is that (logical value is high level
1) (the grid input high level of NMOS tube), switch conduction when；When Fk control signal is low level (logical value 0)
When (the grid input low level of NMOS tube), switch OFF.
Form controlled capacitance series parallel switch control circuit as shown in Figure 3.Fig. 5 is that kth level elementary cell actual circuit connects
Connect mode.Thus an electric capacity adaptation connection is completed.
Fig. 4 is the operating state of switch when realizing 40uF equivalent capacitances.Now F1-F8 inputs control signal 0x07, D1-
D7 input control signals 0x01.Electronic switch B1, B2 are closed, the first single-pole double-throw switch (SPDT) chip C1, the second single-pole double-throw switch (SPDT)
Chip C2 fixed point (No. 5 pins) is closed to the first movable contact 1 (No. 6 pins), and now 57uF electric capacity is in parallel with 10uF electric capacity
Afterwards, connected with 99uF, final capacitance is 40uF.
By taking the elementary cell of 8 resonant capacitance adaptations described above as an example, the output end of electric capacity connection in series-parallel control circuit
For E1, E2, it is connected with the resonant inductance group of Three-Dimensional Magnetic characteristic measuring system.All Ck1 in Fig. 3, Ck2 single-pole double-throw switch (SPDT)s
All all sames, all opened for the controlled type single-pole double-throw switch (SPDT) of electronics, the utility model using MAX4644 chips as single-pole double throw
Close.
The minimum bit series control signal wire Dk of 8 elementary cells forms D1-D7 series controls signal wire (most in sequence
Final stage control signal does not have next stage, so do not have D8 signal wires, but considers to run, last perseverance for 0), and with
The PA8-PA14 pins of single-chip microcomputer are connected.
Automation resonant capacitance adaptation of the present utility model suitable for Three-Dimensional Magnetic characteristic measuring system, the adapter
Composition includes Three-Dimensional Magnetic characteristic measuring system, three resonant inductance groups, three resonant capacitance adaptations and single chip control unit；
Wherein, three magnetizing coil windings in Three-Dimensional Magnetic characteristic measuring system, each magnetizing coil winding and one it is humorous
Inductive bank of shaking is connected, and each resonant inductance group is connected with a resonant capacitance adaptation, three resonant capacitance adaptations respectively and
Single chip control unit is connected, also direct and Three-Dimensional Magnetic characteristic measuring system the serial communication interface of single chip control unit.
It is specific as shown in Figure 7：Three-Dimensional Magnetic characteristic measuring system shares three magnetizing coil windings, corresponding and X-axis, Y-axis, Z
The excitatory direction of axle.The magnetizing coil winding in each direction passes through the output in corresponding resonant inductance group and electric capacity adaptation
Capacitance matches, therefore needs to be corresponding with three electric capacity adaptations.The electric capacity adaptation being connected with X-axis inductance is referred to as X-axis resonance electricity
Hold adaptation；The electric capacity adaptation being connected with Y-axis inductance is referred to as Y-axis resonant capacitance adaptation；The electric capacity being connected with Z axis inductance
Orchestration is referred to as Z axis resonant capacitance adaptation.
Described single chip control unit includes single-chip microcomputer.The specific model stm32f103ze of the present embodiment.
Least-significant bytes of the B1-B8 as 16 bit switch control signal data, D1-D7 is as 16 bit switch control signal data
High eight-bit.This 16 switch controlling signal data is as electric capacity series parallel switch control signal, 16 pins with stm32
Be connected (such as X-axis resonance directions switch controlling signal data connection PA0-PA15, Y-axis resonance directions switch controlling signal data
Connect PB0-PB15, Z axis resonance directions switch controlling signal data connection PC0-PC15), drive the switch mosfet in Fig. 3
B1-B8's and MAX4644 opening or turning off.
The controlled type single-pole double-throw switch (SPDT) of electronics herein refers to a kind of controlled trigistor, can be by control
End logic level signal (0 or 1) processed comes the folding direction of controlling switch, can change the flow direction of electric current in circuit.With
Exemplified by MAX4644 SOT23-6 chips, No. 1 pin-IN end of this chip is control end interface, can change the folding of switch
Direction.No. 4 pins, No. 6 pins are movable contacts, and No. 5 pins are fixed points.Program flow diagram is as shown in figure 5, three-dimensional magnetic characteristic
The control terminal of measuring system sends serial data by serial ports according to the communication protocol shown in form two.Single-chip microcomputer parses data lattice
Formula, obtain function word instruction and capacitance value data.The resonant capacitance of configuration X-axis, Y-axis or Z axis is judged according to function word.Root
Table look-up to obtain switch motion current potential according to capacitance value data.Single-chip microcomputer output action current potential, controlling switch are cut-off, and complete electric capacity string simultaneously
Connection operation.Single-chip microcomputer returns to ack signal, notifies single-chip microcomputer execution current potential.
When automation resonant capacitance adaptation described in the utility model suitable for Three-Dimensional Magnetic characteristic measuring system is run
Automatic operating can be realized by control program.Described control program is write by C language and completes and download in single-chip microcomputer,
Mainly realize two functions.One, there is provided the agreement to be communicated with host computer；Two, the capacitance values transmitted according to host computer, control phase
Inductive switch acts, and realizes the series-parallel operation of electric capacity, so as to obtain the capacitance values of equivalence.Specific algorithm is to carry form one
The equivalent capacitance of confession relation corresponding with monolithic machine control signal is write in ROM in the form of two-dimensional array, and parsing host computer leads to
The capacitance data that serial ports is sent is crossed, the immediate equivalent capacitance of traversal queries, single-chip microcomputer exports to be opened corresponding to this equivalent capacitance
Pass acts.
Step 1：Fig. 1 is Three-Dimensional Magnetic characteristic measuring system schematic diagram, and host computer sets magnet excitation frequency and magnetizing coil inductance
Amount, the capacitance being calculated are transmitted to slave computer analyze data by serial ports.
Step 2：Signal after power amplifier amplifies is added on magnetizing coil, is produced with resonance matching capacitance resonance
Raw exciting curent, Three-Dimensional Magnetic feature measurement is completed so as to produce magnetic field in three directions.Slave computer parses host computer capacitance
Data, pass through the working value that is switched of tabling look-up.
Step 3：Under slave computer control, the switch motion in three resonant capacitance casees, resonant capacitance completes connection in series-parallel behaviour
Make.
Step 4：Start Three-Dimensional Magnetic feature measurement experimental implementation, draw Three-Dimensional Magnetic performance data.
Step 5：Host computer inputs the frequency of next experiment, system automatically from step at the beginning, without Human disturbance.
The described automation resonant capacitance adaptation operation suitable for Three-Dimensional Magnetic characteristic measuring system, the correlation that is related to
Software or program, are known technology, and those of ordinary skill in the art are according to the composition of device, and above-mentioned operating procedure, very
Easily write realization.In multiple elementary cells of described electric capacity series parallel switch control circuit, electric capacity in each unit
The test frequency and magnetizing inductance selected in selection by Three-Dimensional Magnetic characteristic measuring system determines, by formulaReally
Make basic capacitor's capacity.
According to the three-dimensional inductance value L for surveying resonant inductance in characteristic measuring system, and the experiment typical magnet excitation frequency to be determined
F, according to formulaDetermine the electricity of 99uF, 57uF, 10uF, 9uF, 3uF, 1uF, 0.5uF, 0.1uF capacity
Hold.By taking this this 8 typical electric capacity as an example, form one represents the partition capacitance numerical value that can be realized by series-parallel operation, when
When needing some capacitor's capacity, the control signal that should be exported corresponding to single-chip microcomputer.Control signal F is shunt control signal
Line F1-F8, pin corresponding with single-chip microcomputer are connected.Control signal D is that permanent (D8 does not have for 0 by series control signal wire D1-D7, D8
Specific circuit connection, default setting 0).D1-D7 pins corresponding with single-chip microcomputer are connected.Data in form need monolithic
In machine write-in internal memory, as single-chip microcomputer look-up routine pith.
Form two, form three are protocol parts.A single-chip microcomputer needs to control three resonant capacitances in this patent
Orchestration, SCM program are that the electric capacity matching box that function word in a frame communication data distinguishes some direction (is specially X-axis
Resonant capacitance adaptation, Y-axis resonant capacitance adaptation, Z axis resonant capacitance adaptation), calculate capacitance data and export corresponding
Control signal.Communication protocol according to form two, form three writes program, and single-chip microcomputer can be with Three-Dimensional Magnetic characteristic measuring system
Communicated.
Form one, form two, form three, it is the detail part that SCM program is realized in Fig. 8.Form one illustrates
Capacitance values and single-chip microcomputer PA, PB or the corresponding relation of pc port output action current potential.Form two defines serial data lattice
Formula.Form three defines the data format that single-chip microcomputer sends information.
Capacitance and control signal can be set in the part of resonance adaptation
Form one
Host computer and slave computer communication protocol
Form two
Slave computer and host computer communication protocol
Form three
The utility model unaccomplished matter is known technology.
Claims (2)
1. a kind of automation resonant capacitance adaptation suitable for Three-Dimensional Magnetic characteristic measuring system, automation resonant capacitance matching
The composition of device includes three electric capacity adaptations and single-chip microcomputer；
Wherein, three electric capacity adaptations are connected with single-chip microcomputer respectively；
It is characterized in that electric capacity adaptation includes n elementary cell in parallel, each elementary cell includes an electric capacity, an electricity
Sub switch and two single-pole double-throw switch (SPDT)s；Wherein, i.e., electronic switch is connected with electric capacity, the other end of electronic switch and the first hilted broadsword
The fixed point of commutator is connected, and the fixed point of the other end of electric capacity and the second single-pole double-throw switch (SPDT) is connected, and thus forms one
The elementary cell of resonant capacitance adaptation described in this adaptation；Each single-pole double-throw switch (SPDT) has two movable contacts；
The parallel connection of n described elementary cell is specially：The second movable contact and next stage of first single-pole double-throw switch (SPDT) of kth level
The first single-pole double-throw switch (SPDT) fixed point be connected, the first movable contact of the first single-pole double-throw switch (SPDT) of kth level and next stage second
First movable contact of single-pole double-throw switch (SPDT) is connected；Second movable contact of the second single-pole double-throw switch (SPDT) of kth level and the of upper level
The fixed point of two single-pole double-throw switch (SPDT)s is connected, and the first movable contact and upper level first of the second single-pole double-throw switch (SPDT) of kth level are single
First movable contact of double-pole double throw switch is connected；Meanwhile first is not provided with the second single-pole double-throw switch (SPDT) in elementary cell, first is basic
The other end of electric capacity A1 in unit is connected with the second movable contact in the second single-pole double-throw switch (SPDT) in the second elementary cell, and
Connect a lead-out terminal E1；The first single-pole double-throw switch (SPDT), the other end of electronic switch are not provided with afterbody elementary cell
With upper level elementary cell more than in the first single-pole double-throw switch (SPDT) in the second movable contact be connected, and connect a lead-out terminal
E2；E1, E2 are connected with the resonant inductance group of Three-Dimensional Magnetic characteristic measuring system respectively；
Described n=4~12, k are less than n；
In described elementary cell, electronic switch is depletion type N-channel MOS pipe, and the source electrode of metal-oxide-semiconductor is connected with electric capacity, drain electrode with
The fixed point of first single-pole double-throw switch (SPDT) is connected, and the grid of NMOS tube is drawn signal wire and is connected with single-chip microcomputer；
Described single-pole double-throw switch (SPDT) is identical, is the electronic chip with single-pole double-throw switch (SPDT) function, and the chip has at least 6
Individual terminal；Wherein, three terminals are respectively as fixed point, the first movable contact and the second movable contact；Second single-pole double-throw switch (SPDT) core
Piece forth terminal is connected with the forth terminal of the first single-pole double-throw switch (SPDT) chip of upper level, and draws as signal wire Dk, Dk
It is connected with single-chip microcomputer.
2. it is applied to the automation resonant capacitance adaptation of Three-Dimensional Magnetic characteristic measuring system, its feature as claimed in claim 1
It is MAX4644 chips for described single-pole double-throw switch (SPDT).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720388703.5U CN207007913U (en) | 2017-04-13 | 2017-04-13 | Suitable for the automation resonant capacitance adaptation of Three-Dimensional Magnetic characteristic measuring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720388703.5U CN207007913U (en) | 2017-04-13 | 2017-04-13 | Suitable for the automation resonant capacitance adaptation of Three-Dimensional Magnetic characteristic measuring system |
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841736B (en) * | 2017-04-13 | 2023-05-23 | 河北工业大学 | Automatic resonant capacitor matcher suitable for three-dimensional magnetic characteristic measurement system |
-
2017
- 2017-04-13 CN CN201720388703.5U patent/CN207007913U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841736B (en) * | 2017-04-13 | 2023-05-23 | 河北工业大学 | Automatic resonant capacitor matcher suitable for three-dimensional magnetic characteristic measurement system |
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