CN109443462A - A kind of antimagnetic measuring and testing device - Google Patents
A kind of antimagnetic measuring and testing device Download PDFInfo
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- CN109443462A CN109443462A CN201811497289.7A CN201811497289A CN109443462A CN 109443462 A CN109443462 A CN 109443462A CN 201811497289 A CN201811497289 A CN 201811497289A CN 109443462 A CN109443462 A CN 109443462A
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- 239000002184 metal Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 7
- 230000001939 inductive effect Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
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- 229910052737 gold Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/586—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters constructions of coils, magnetic circuits, accessories therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a kind of antimagnetic measuring and testing devices, including the pallet rotated about the axis and it is located at pallet top and fixed rotation detection module, the tray upper surface is in partially metallised state, the rotation detection module includes the exciting circuit being sequentially connected, PCB coil and signal processing circuit, the PCB coil includes with plane parallel on pallet and the center of circle is located at excitation coil on the axis and angularly multiple induction coils of circumferential array inside excitation coil, and adjacent company induction coil matches two-by-two, it is characterized in that, the signal processing circuit includes the sample circuit for switching amplifying circuit and being connected to the switch amplifying circuit sampling end, and one end of each induction coil is respectively connected to the input terminal of switch amplifying circuit.Switch amplifying circuit of the invention can amplify the inductive signal of induction coil, increase the maximum distance between the upper plane of pallet and PCB coil plane.
Description
Technical field
The present invention relates to the fluid meterings such as liquid meter, gas dosing fields, and in particular to a kind of antimagnetic gauge check dress
It sets.
Background technique
In fluid metering application at present, the most common mode be moved based on fluid or gas fluxion strap mechanical part rotate come
Detect the flow velocity or flow of liquid or gas.Wherein there is a kind of antimagnetic measuring and testing device, is used to traffic transformation be number
Signal.
There is several frequently seen gauge check mode in fluid metering in the prior art:
The first uses magnetic sensor, mostly places small-sized permanent magnet in rotor position of keeping to the side, permanent magnet around axis rotation,
The magnetic sensors such as tongue tube are placed above permanent magnet rotating path, and magnetic field state variation is switched into electric signal.But due to outside
High-intensity magnetic field is easy to interference magnetic sensor state, therefore this method anti-interference ability is poor.
Second, if Chinese patent discloses a kind of Patent No. ZL200680007522.8, patent name is induction type
The patent of invention of angle level sensor, the invention solve the problems, such as that traditional magnetic sensor is easy to be interfered by permanent magnet.But its
The output signal of secondary coil is directly output to comparator, since the output signal of secondary coil is the disk that metallized by induction
Rotation induction, signal itself is fainter, so directly output information to the mode of comparator, can make to metallize
By biggish limitation, the two needs closer distance for the distance between disk and antimagnetic gauge check module, is slightly away from
It is some to largely effect on testing result.
Summary of the invention
Regarding the issue above, the present invention provides a kind of antimagnetic gauge check dress for capableing of amplification detection signal
It sets.
In order to achieve the above objectives, present invention employs following technical proposals:
A kind of antimagnetic measuring and testing device including the pallet rotated about the axis and is located at pallet top and fixed antimagnetic meter
Detection module is measured, the tray upper surface is in partially metallised state, and the antimagnetic gauge check module includes being sequentially connected
Exciting circuit, PCB coil and signal processing circuit, the PCB coil includes with plane parallel on pallet and the center of circle is located at institute
State excitation coil on axis and angularly multiple induction coils of circumferential array inside excitation coil, which is characterized in that letter
Number processing circuit includes the sample circuit for switching amplifying circuit and being connected to the switch amplifying circuit sampling end, switch amplification electricity
The input terminal on road is connected with corresponding induction coil respectively, and one end of induction coil is then interconnected in same point, induction coil
For odd number, and two neighboring induction coil matches two-by-two.
In above-mentioned antimagnetic measuring and testing device, the sample circuit includes control comparison circuit and is connected to the control
The charge-discharge circuit of comparison circuit processed, the switch amplifying circuit by the charge-discharge circuit be connected to it is described control it is more electric
Road.
In above-mentioned antimagnetic measuring and testing device, the sample circuit includes multiple charge-discharge circuits, described to open
Closing amplifying circuit includes multiple amplifiers, and each induction coil is all connected to the input terminal of different amplifiers, each amplifier
Sampling end is connected to control comparison circuit by the charge-discharge circuit, and corresponding two amplifiers of induction coil pass through in pairs
Different charge-discharge circuits is connected to control comparison circuit.
In above-mentioned antimagnetic measuring and testing device, the corresponding amplifier of an induction coil passes through the same charge and discharge electricity
Road is connected to control comparison circuit, and 2 paired induction coils share another impulse electricity circuit connection compared with control
The device other end.
In above-mentioned antimagnetic measuring and testing device, each charge-discharge circuit includes resistance and capacitor interconnected,
The common end of the capacitor and resistance is connected to respective amplifier and control comparison circuit, another termination of the capacitor
Ground.
In above-mentioned antimagnetic measuring and testing device, the driving end of each amplifier is connected to monolithic by impulse generator
The driving port of machine is opened by single-chip microcontroller control two of them amplifier every time, and induction coil pairs of every time is corresponding
Two amplifiers open simultaneously or close.
In above-mentioned antimagnetic measuring and testing device, the corresponding amplifier of 3 induction coils is connect with impulse generator, no
Single-chip microcontroller different driving port is connected to impulse generator.
In above-mentioned antimagnetic measuring and testing device, the amplifier is transistor, and each induction coil is all connected to phase
The base stage of transistor is answered, the emitter of the transistor is connected to corresponding pulses generator, and collector is connected to corresponding charge and discharge
Circuit；
The induction coil is equal-sized three, is followed successively by the first induction coil A, the second induction coil B, the third line of induction
Enclose C.Third induction coil C is respectively with the first induction coil A and the second induction coil B with pairs of.
In above-mentioned antimagnetic measuring and testing device, the control comparison circuit includes the single-chip microcontroller, the single-chip microcontroller
It is inside integrated with comparator and timer, the positive port of comparator for being connected to the comparator is led on the single-chip microcontroller and is compared
Device negative terminal mouth, and the positive port of comparator is connected to a charge-discharge circuit, comparator negative terminal mouth is connected to another charge and discharge electricity
Road, and the pairs of corresponding charge-discharge circuit of induction coil be respectively connected to the same comparator the positive port of comparator and
Comparator negative terminal mouth.
In above-mentioned antimagnetic measuring and testing device, the tray upper surface has fan-shaped sheet metal so that tray upper surface
In partially metallised state；
Multiple induction coils are lighted from respective center respectively, mutual in the center point of excitation coil after outside pile warp multi-turn
Connection, the central point of each induction coil are connected with corresponding amplifier；
The antimagnetic gauge check module is multilayer board, and the shielding including PCB coil and above PCB coil
Layer, the excitation coil and induction coil are printed in PCB coil layer.
The present invention has the advantages that
1. using three induction coils, turnning circle and rotation direction can be obtained, in the case where the induction coil gross area is certain,
Single induction coil area is maximum, and the energy intensity variation bound that each pair of induction coil senses all becomes larger, and can mention according to this
High detection sensitivity, to improve the distance between sheet metal on gauge check module and pallet.
2. switch amplifying circuit can amplify the inductive signal of induction coil, upper plane and the PCB coil for increasing pallet are flat
Maximum distance between face.
3. sharing a sample circuit, and comparator, timer in sample circuit using the operating mode of time sharing sampling
Space and cost can be saved using the single-chip microcontroller of integrated comparator and timer in the prior art.
4. constituting sample circuit by capacitor, resistance, comparator and timer, examined by the discharge time of capacitor and discharge capacity
The changing value for surveying inductive signal is remarkably improved the distance between sheet metal on antimagnetic gauge check module and pallet, while can
The distance change of judgement between the two, detects whether antimagnetic gauge check module occurs disengaging etc..
Detailed description of the invention
Fig. 1 is antimagnetic measuring and testing device and tray position relation schematic diagram；
Fig. 2 is the structural schematic diagram for printing PCB coil on a printed circuit board；
Fig. 3 is the detection principle diagram of antimagnetic measuring and testing device.
In figure: pallet 1；Sheet metal 2；Antimagnetic gauge check module 3；Axis 4；Excitation coil 5；Induction coil 6；First sense
Answer loop A；Second induction coil B；Third induction coil C；Capacitor C6, C7；Resistance R6, R7；Single-chip microcontroller U1；Exciting circuit 7；It adopts
Sample circuit 8；Control comparison circuit 81；Charge-discharge circuit 82；Comparator 83；Timer 84；Switch amplifying circuit 9；Pulse generation
Device 91；Transistor Q.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, mechanical transmission component will drive pallet 1 and rotate around its axis 4, root when liquid or gas flow
According to actual liquid or gas flow, pallet 1 is rotated by direction pivots clockwise or counter-clockwise, pallet 1 can for round tray or
Non-circular pallet, the preferably circular pallet of the present embodiment, 1 upper surface of pallet inlay or coated with fan-shaped metal materials, such as
In Fig. 1,1 upper surface of pallet has inlayed one 120 ° fan-shaped sheet metals 2 and has been also possible to 240 ° of gold in actual use certainly
Belong to piece, three induction coils have divided 360 ° equally in this example, i.e., each line of induction encloses 120 ° of areas, herein preferably 120 ° it is fan-shaped
Sheet metal ensure that some time is carved with and have and only one induction coil is completely covered by sheet metal.
Antimagnetic gauge check module 3 is fixed on right above pallet 1, in actual use, pallet 1 and antimagnetic gauge check module
It can be placed between 3 or filling glass, the nonmetallic materials such as plastics.
Specifically, the antimagnetic gauge check module 3 of the present embodiment includes exciting circuit 7, PCB coil and the letter being sequentially connected
Number processing circuit, and antimagnetic gauge check module 3 here is a printed circuit board, printed board can be doubling plate or multilayer
Plate, and at least include PCB coil layer and the shielded layer above PCB coil layer, the present embodiment select four-layer structure, from up to
Under successively are as follows: first layer is component layer, and the second layer is shielded layer, and third layer is vacant layer, and the 4th layer is PCB coil layer；When
Module behaves rear shielded layer and interference of the PCB coil layer to component layer has been isolated well, while also isolation well
Interference of other electromagnetic waves to PCB coil layer.
PCB coil includes the excitation coil 5 and three induction coils 6 for being printed on printed circuit board close to 1 one side of pallet, is swashed
It is rounded and three induction coils 6 are enclosed in its circle to encourage coil 5.3 induction coils 6 angularly circumferential array, and it is every
A coil size is consistent, collectively constitutes a circle.Further, one side and support of the antimagnetic gauge check module 3 close to pallet 1
1 upper surface of disk is parallel, and the circular center of circle that the center of circle of excitation coil 5 and three induction coils 6 are encircled into is respectively positioned on support
On the axis 4 that disk 1 rotates.It should be noted that detection turnning circle at least needs 1 pair of induction coil 6, if you need to judge rotation side
To then at least needing 2 pairs of induction coils 6.As shown in Fig. 2, the present embodiment is made into 2 pairs of induction coils, and 3 using 3 induction coils
A induction coil is denoted as the first induction coil A, the second induction coil B, third induction coil C respectively.Three induction coils first
Induction coil A and third induction coil C is in pairs, and the second induction coil B and third induction coil C are with pairs of.
Further, excitation coil 5 is connected to exciting circuit 7, and exciting circuit 7 can use RC differential circuit, excitation electricity
The driving pulse that road 7 is connected to single-chip microcontroller U1 to make exciting circuit 7 generate the period by single-chip microcontroller U1.In the present embodiment, pulse
The pulsewidth of signal is set as 5 ~ 20ns, such as 10ns, can effectively reduce power consumption and reduces external disturbance.
Particularly, as shown in figure 3, the signal processing circuit of the present embodiment includes switch amplifying circuit 9 and is connected to switch
The sample circuit 8 of 9 sampling end of amplifying circuit, and one end of each induction coil 6 is respectively connected to the input of switch amplifying circuit 9
The inductive signal of induction coil 6 is amplified at end, and by the inductive signal being exaggerated send to sample circuit 8 be compared it is defeated
Out；Wherein, sample circuit 8 includes controlling comparison circuit 81 and multiple charge-discharge circuits 82 for being connected to control comparison circuit 81,
Switch amplifying circuit 9 is connected to control comparison circuit 81 by multiple charge-discharge circuits 82.
Specifically, switch amplifying circuit 9 includes multiple amplifiers, and each induction coil is all connected to the defeated of different amplifiers
Enter end, the sampling end of each amplifier is connected to control comparison circuit 81 by charge-discharge circuit 82, and induction coil 6 is right in pairs
Two amplifiers answered are connected to control comparison circuit 81 by different charge-discharge circuits 82, specific to the present embodiment, such as Fig. 3
Shown, the first induction coil A amplifier corresponding with the second induction coil B is connected to control by the same charge-discharge circuit 82
Comparison circuit 81, the corresponding amplifier of third induction coil C are connected to control comparison circuit by another charge-discharge circuit 82
81, two induction coils 6 here share a charge-discharge circuit 82, can save raw material, reduce cost, simplify circuit,
And it will not have any impact to testing goal.
Further, as shown in Fig. 2, three induction coils 6 of the present embodiment are lighted from respective center respectively, outside around
After multi-turn, it is connected with each other in the center point of excitation coil 5, the central point of each induction coil 6 and corresponding amplification
Device is connected.
Further, as shown in figure 3, each charge-discharge circuit 82 include capacitor C6, C7 interconnected and resistance R6,
The common end of R7, capacitor C6, C7 and resistance R6, R7 in each charge-discharge circuit 82 are connected to respective amplifier and control
Comparison circuit 81, the other end ground connection of capacitor C6, C7, the other end of resistance R6, R7 are connected in single-chip microcontroller U1；Control comparison circuit 81
Including aforementioned single-chip microcontroller U1, it is integrated with comparator 83 and timer 84 in single-chip microcontroller U1, is led on single-chip microcontroller U1 and is connected to ratio
The positive port of comparator and comparator negative terminal mouth compared with device 83, and the positive port of comparator is connected to a charge-discharge circuit 82, compares
Device negative terminal mouth is connected to another charge-discharge circuit 82, and the pairs of corresponding charge-discharge circuit 82 of induction coil 6 difference
It is connected to the positive port of comparator and the comparator negative terminal mouth of the same comparator 83.Specific to the present embodiment, as shown in figure 3,
One induction coil A, the second induction coil B and the one end third induction coil C are connected with each other, and the other end is then put with corresponding
Big device is connected, and the respective amplifier sampling end of the first induction coil A and the second induction coil B is connected to by charge-discharge circuit 82
The anode of comparator 83, third induction coil C are connected to the cathode of comparator 83 by charge-discharge circuit 82.In this way, a pair of of sense
Answer the inductive signal on coil that can be compared by comparator 83.Wherein the comparator of two pairs of induction coils connection can be with
It is same, or different, correspondingly, one or more comparators are integrated in single-chip microcontroller U1.
Further, the driving end of each amplifier is connected to the driving port of single-chip microcontroller U1 by impulse generator 91,
It is opened every time by single-chip microcontroller U1 control two of them amplifier, and 6 corresponding two amplifiers of induction coil pairs of every time are same
When open or close.Specifically, amplifier here is preferably transistor Q, and each induction coil 6 is all connected to respective transistor
The base stage of Q, i.e. input terminal；The emitter of transistor Q, i.e. driving end are connected to corresponding driving by corresponding pulses generator 91
Port；The collector of transistor Q, i.e. sampling end are connected to corresponding charge-discharge circuit 82.
The reality of rotation detection device is described by taking the fan-shaped sheet metal of a comparator, two charge-discharge circuits and 120 ° as an example below
Existing principle:
When work, half-round metal piece 2 on round tray 1 is by rotating clockwise or counterclockwise, the pulse that exciting circuit 7 generates
By excitation coil 5, by some cycles, electromagnetic radiation signal, induction coil 6 can then generate the voltage of induction to signal outward；When anti-
When half-round metal piece 2 on 3 lower circular pallet 1 of magnetic gauge check module is gone at some induction coil 6 of top, it will form
Inductance vortex, leads to bigger power consumption, induced voltage is less than normal at this；When the round support of antimagnetic 3 lower section of gauge check module
When half-round metal piece 2 on disk 1 is far from some induction coil 6 of top, vortex is substantially not present, the induced voltage is opposite
It is larger.
When MCU driving end exports low level to impulse generator 91, transistor Q is closed；The output of MCU driving end is high
When level is to impulse generator 91, transistor Q conducting, transistor Q is in magnification region at this time, and corresponding capacitor C6 or C7 is opened
Begin to discharge, the velocity of discharge is influenced by the induced voltage of induction coil 6, and discharge time excited target signal pulse-width controlled is usually several
A nanosecond.Small induced voltage signal is enlarged into the strong voltage signal on capacitor by transistor Q in induction coil 6, can be non-
It is often effective to promote detection sensitivity, increase the spacing between the fan-shaped sheet metal 2 on antimagnetic gauge check module 3 and pallet 1.
Before acquiring signal, for single-chip microcontroller U1 by capacitor C6, C7 is fully charged, and the pulse signal that exciting circuit 7 generates is by swashing
Coil 5 is encouraged by some cycles electromagnetic radiation signal outward；When sampling, switch amplifying circuit is controlled by single-chip microcontroller U1, by a timing
Between interval timesharing open the first induction coil A, third induction coil C respectively where transistor Q and the second induction coil B, the
Transistor Q where three induction coil C difference, those skilled in the art can be according between specific application scenarios setting time
Every, and basic principle is, applies to be less than in the interval time of the comparatively faster scene of revolving speed and applies the field relatively slow in revolving speed
The interval time of scape saves the target of power consumption under the premise of guaranteeing detection accuracy with satisfaction.And by transistor Q respectively to capacitor
C6, C7 electric discharge, convert capacitor C6, C7 discharge capacity size for the voltage sensed.For example, when the first induction coil A and third
After induction coil C is opened, due to the presence of 1 upper half circular metal plate 2 of round tray, the first induction coil A and the third line of induction
The induced voltage for enclosing C is in different size, causes remaining voltage after discharging on capacitor C6 and C7 different, then by single-chip microcontroller U1
Comparator 83 compares the voltage swing of two capacitors C6 and C7, and the slow of capacitor for controlling high voltage is discharged to two capacitor C6
Equal with C7 voltage, single-chip microcontroller U1 timer 84, which counts, obtains the discharge time.Since sheet metal 2 is 120 ° of fans circles, therefore can
To judge 2 position of sheet metal corresponding to the first induction coil A and the underface third induction coil C, root by discharge time length
Turnning circle is judged according to the variation of position.The first induction coil A, third induction coil C and second are successively obtained by the above process
The state of induction coil B, third induction coil C are compared with preset position encoded table, are closed by each state change
System, can obtain 2 rotation direction of sheet metal.It is worth noting that, using the equally available charge and discharge electricity of mode of AD sampling
The value for holding residual voltage, in contrast, adding timer more advantageous in power consumption control using comparator.
Further, single-chip microcontroller U1 can use low-power consumption PIC single chip microcomputer in the present invention, which has high property
The RISC CPU of energy, flexible oscillator structure, while including simulation comparison module, timer module meets actual functional capability need
It asks, the characteristic of low-power consumption can meet battery powered usage scenario, therefore be selected as the control core of antimagnetic gauge check module 3
The heart.
It should be strongly noted that the present embodiment by by small voltage change switch to more obvious time change come
Sensitivity is improved, position judgement can be carried out based on smaller signal, avoid the prior art since weak output signal problem causes
The problem of spacing between fan-shaped sheet metal 2 in antimagnetic gauge check module and pallet 1 is by larger limitation.The present invention is available
In occasions such as liquid flow mearuement, the measurement of gas flow, low-speed machinery transmission circle counting numbers；And effectively solve traditional tongue tube
Modes such as metering method, Hall sensor metering method, plug-in unit inductance type non-magnetic metering etc. are vulnerable to external electromagnetic signal interference
Problem.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (10)
1. a kind of antimagnetic measuring and testing device including the pallet (1) rotated around axis (4) and is located above pallet (1) and fixed
Motionless antimagnetic gauge check module (3), the tray upper surface are in partially metallised state, the antimagnetic gauge check module
(3) include exciting circuit (7), PCB coil and the signal processing circuit being sequentially connected, the PCB coil include on pallet (1)
Plane parallel and the center of circle are located at the excitation coil (5) on the axis (4) and angularly circumferentially arrange in excitation coil (5) inside
Multiple induction coils (6) of column, which is characterized in that signal processing circuit is including switch amplifying circuit (9) and is connected to described open
Close amplifying circuit (9) sampling end sample circuit (8), switch amplifying circuit (9) input terminal respectively with corresponding induction coil
It is connected (6), one end of induction coil (6) then interconnects in same point, and induction coil is odd number, and the two neighboring line of induction
Circle (6) matches two-by-two.
2. antimagnetic measuring and testing device according to claim 1, which is characterized in that the sample circuit (8) includes control
Comparison circuit (81) and the charge-discharge circuit (82) for being connected to control comparison circuit (81), the switch amplifying circuit (9)
The control comparison circuit (81) is connected to by the charge-discharge circuit (82).
3. antimagnetic measuring and testing device according to claim 2, which is characterized in that the sample circuit (8) includes multiple
The charge-discharge circuit (82), the switch amplifying circuit (9) includes multiple amplifiers, and each induction coil is all connected to difference
The sampling end of the input terminal of amplifier, each amplifier is connected to control comparison circuit (81) by the charge-discharge circuit, and
Pairs of corresponding two amplifiers of induction coil (6) are connected to control comparison circuit by different charge-discharge circuits (82)
(81).
4. antimagnetic measuring and testing device according to claim 3, which is characterized in that an induction coil (6) is corresponding to put
Big device is connected to control comparison circuit (81) by the same charge-discharge circuit (82), and 2 paired induction coils share
The connection of another impulse electricity circuit (82) and control comparator (81) other end.
5. antimagnetic measuring and testing device according to claim 3, which is characterized in that each charge-discharge circuit (82) includes
The common end of resistance (R6, R7) interconnected and capacitor (C6, C7), the capacitor (C6, C7) and resistance (R6, R7) connects respectively
It is connected to respective amplifier and control comparison circuit (81), the other end ground connection of the capacitor (C6, C7).
6. according to antimagnetic measuring and testing device described in claim 3-5 any one, which is characterized in that the drive of each amplifier
Moved end is connected to the driving port of single-chip microcontroller (U1) by impulse generator (91), every time wherein by the single-chip microcontroller (U1) control
Two amplifiers are opened, and corresponding two amplifiers of induction coil (6) pairs of every time are opened simultaneously or closed.
7. antimagnetic measuring and testing device according to claim 6, which is characterized in that the corresponding amplifier of induction coil (6)
It is connect with impulse generator (91), different impulse generators (91) are connected to the single-chip microcontroller (U1) different driving port.
8. antimagnetic measuring and testing device according to claim 7, which is characterized in that the amplifier is transistor (Q), often
A induction coil is all connected to the base stage of respective transistor (Q), and the emitter of the transistor (Q) is connected to corresponding pulses
Device (91), collector are connected to corresponding charge-discharge circuit (82)；
Described induction coil (6) this case is equal-sized three, is followed successively by the first induction coil (A), the second induction coil
(B), third induction coil (C), third induction coil (C) are made into the first induction coil (A) and the second induction coil (B) respectively
Right, induction coil is connect with respective impulse generator respectively.
9. antimagnetic measuring and testing device according to claim 7, which is characterized in that the control comparison circuit (81) includes
The single-chip microcontroller (U1), is integrated with comparator (83) and timer (84) in the single-chip microcontroller (U1), on the single-chip microcontroller (U1)
The positive port of comparator for being connected to the comparator (83) and comparator negative terminal mouth are led to, and the positive port of comparator is connected to one
A charge-discharge circuit (82), comparator negative terminal mouth is connected to another charge-discharge circuit (82), and pairs of induction coil (6) is each
Self-corresponding charge-discharge circuit (82) is respectively connected to the positive port of comparator and the comparator negative terminal mouth of the same comparator (83).
10. antimagnetic measuring and testing device according to claim 3, which is characterized in that pallet (1) upper surface has fan
Shape sheet metal (2) is so that pallet (1) upper surface is in partially metallised state；
Multiple induction coils (6) are lighted from respective center respectively, after outside pile warp multi-turn, in the center of circle of excitation coil (5)
Place is connected with each other, and the central point of each induction coil (6) is connected with corresponding amplifier；
The rotation detection module (3) is multilayer board, and the shielding including PCB coil and above PCB coil
Layer, the excitation coil (5) and induction coil (6) are printed in PCB coil layer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811497289.7A CN109443462B (en) | 2018-12-07 | 2018-12-07 | Antimagnetic metering detection device |
| PCT/CN2019/091850 WO2020113940A1 (en) | 2018-12-07 | 2019-06-19 | Anti-magnetic metering and detection device |
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| CN109945931A (en) * | 2019-04-23 | 2019-06-28 | 宁波水表股份有限公司 | Metering device and gauge |
| CN110346000A (en) * | 2019-07-24 | 2019-10-18 | 杭州乾博科技有限公司 | A kind of coil induction type water meter with abnormal detection function |
| CN110530437A (en) * | 2019-09-10 | 2019-12-03 | 长沙铨准电子科技有限公司 | A kind of directly excitation formula angle position sensing metering device |
| CN110823300A (en) * | 2019-11-28 | 2020-02-21 | 王元西 | Planar winding coil angular position sensor |
| WO2020113940A1 (en) * | 2018-12-07 | 2020-06-11 | 杭州为峰智能科技有限公司 | Anti-magnetic metering and detection device |
| CN111854897A (en) * | 2020-08-05 | 2020-10-30 | 湖北楚天汉仪科技有限公司 | Detection device for metal rotary water meter with quantifiable detection distance |
| CN111998904A (en) * | 2020-07-08 | 2020-11-27 | 湖南威铭能源科技有限公司 | Non-magnetic metering device, non-magnetic metering method and flow meter |
| CN112050865A (en) * | 2020-09-11 | 2020-12-08 | 武汉盛帆电子股份有限公司 | Nonmagnetic induction measuring device and calculation method of rotation information of rotating plate assembly |
| WO2021238137A1 (en) * | 2020-05-29 | 2021-12-02 | 湖南威铭能源科技有限公司 | Non-magnetic metering device, metering method, and fluid metering apparatus |
| CN115508576A (en) * | 2022-11-22 | 2022-12-23 | 天津赛恩能源技术股份有限公司 | Rotation detection circuit, foreign matter detection method and excitation adjustment method |
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| WO2020113940A1 (en) * | 2018-12-07 | 2020-06-11 | 杭州为峰智能科技有限公司 | Anti-magnetic metering and detection device |
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| WO2022007322A1 (en) * | 2020-07-08 | 2022-01-13 | 湖南威铭能源科技有限公司 | Non-magnetic metering device, non-magnetic metering method, and flow meter |
| CN111854897A (en) * | 2020-08-05 | 2020-10-30 | 湖北楚天汉仪科技有限公司 | Detection device for metal rotary water meter with quantifiable detection distance |
| CN112050865A (en) * | 2020-09-11 | 2020-12-08 | 武汉盛帆电子股份有限公司 | Nonmagnetic induction measuring device and calculation method of rotation information of rotating plate assembly |
| CN115508576A (en) * | 2022-11-22 | 2022-12-23 | 天津赛恩能源技术股份有限公司 | Rotation detection circuit, foreign matter detection method and excitation adjustment method |
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| WO2020113940A1 (en) | 2020-06-11 |
| CN109443462B (en) | 2024-05-10 |
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