CN209043378U - A kind of water meter with nonmagnetic flow detector - Google Patents
A kind of water meter with nonmagnetic flow detector Download PDFInfo
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- CN209043378U CN209043378U CN201821813980.7U CN201821813980U CN209043378U CN 209043378 U CN209043378 U CN 209043378U CN 201821813980 U CN201821813980 U CN 201821813980U CN 209043378 U CN209043378 U CN 209043378U
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Abstract
The utility model is a kind of water meter with nonmagnetic flow detector, damped oscillation sample circuit is set to and with the single-chip microcontroller of timer including two, two damped oscillation sample circuits and the line in the impeller center of circle are mutually perpendicular to, two damped oscillation sample circuits are connected with single-chip microcontroller, damped oscillation sample circuit includes LC charge/discharge control circuit, LC excited oscillation control circuit, LC oscillating circuit, derivative control circuits and integrating circuit, single-chip microcontroller respectively with LC charge/discharge control circuit, LC excited oscillation control circuit, LC oscillating circuit, derivative control circuits are connected with integrating circuit, LC charge/discharge control circuit, LC excited oscillation control circuit and derivative control circuits are connected with LC oscillating circuit.The utility model has the advantages that: it sets there are two damped oscillation sample circuit, detection accuracy is high；Only need single-chip microcontroller that there is timer function, single-chip microcontroller requires low；Detecting distance is long, and it is wide to be applicable in orientation；Circuit composition is simple, few using component, at low cost.
Description
Technical field
The utility model relates to watermeter flowing rate detection more particularly to a kind of water meter with nonmagnetic flow detectors.
Background technique
In recent years, intelligent remote Automatic meter reading is vigorously advocated and applied, water meter with nonmagnetic is also in intelligence instrument
Important a kind of product, no Magnetic testi technology also gradually tend to be mature.The working principle of water meter with nonmagnetic is exactly eddy current effect, mesh
Preceding water meter with nonmagnetic on the market is all to be sampled using eddy current effect to impeller direct sample or indirectly, and then calculate water outlet
The data such as flow or water flow velocity.
The generation of current vortex needs metallic conductor to do cutting magnetic induction line movement in magnetic field, by circuit control in water meter with nonmagnetic
L (inductance), C (capacitor) generate damped oscillation to form magnetic field on the periphery LC, integrate above water meter turbine or counting gear
Metallic conductor, water flow can drive impeller or counting gear to do period rotary motion, and each metallic conductor rotates to LC nearby just
Eddy current effects can be generated, since eddy current will form contrary magnetic field, feeding back to LC will lead to the decaying of damped oscillation
Coefficient increases.Single-chip microcontroller can detecte out water meter turbine or counting gear according to the attenuation coefficient cyclically-varying of damped oscillation
Revolving speed or revolution.Damped oscillation is analog signal, needs just to can be exchanged into continuous data by digitized processing.Water meter with nonmagnetic
In cause the position of metallic conductor uncertain due to impeller rotation, it is therefore desirable to the damped oscillation of area in two kinds of situation: one is
The oscillation and decaying for having eddy current to feed back are very fast；Another kind is the oscillation of no eddy current feedback and decays slower.
Currently, water meter with nonmagnetic flow detection mostly uses greatly the nest plate scheme of TI company MSP430 single-chip microcontroller, the program has
Short, the at high cost disadvantage of detecting distance.
Summary of the invention
The utility model mainly solves the above problem, provides that a kind of detecting distance is long, water meter with nonmagnetic stream at low cost
Amount detecting device.
Technical solution adopted by the utility model to solve its technical problems is a kind of water meter with nonmagnetic flow detector, packets
Include the damped oscillation sample circuit that two are set to above water meter with nonmagnetic impeller and the single-chip microcontroller with timer, two damped oscillations
Sample circuit and the line in the impeller center of circle are mutually perpendicular to, and two damped oscillation sample circuits are connected with single-chip microcontroller, the damping
Vibrating sample circuit includes LC charge/discharge control circuit, LC excited oscillation control circuit, LC oscillating circuit, derivative control circuits and product
Parallel circuit, the single-chip microcontroller respectively with LC charge/discharge control circuit first input end, LC excited oscillation control circuit first input end,
LC oscillating circuit input terminal is connected with derivative control circuits first input end, the second input terminal of LC charge/discharge control circuit and LC excitation
The second input terminal of oscillation control circuit is connected with LC output end of oscillating circuit, and LC output end of oscillating circuit also controls electricity with differential
The second input terminal of road is connected, and derivative control circuits output end is connected with integrating circuit input terminal, integrating circuit output end and monolithic
Machine input terminal is connected.
One side of the water meter with nonmagnetic impeller towards damped oscillation sample circuit, half be insulating surfaces the other half be conducting surface, resistance
It is different that Buddhist nun vibrates the waveform that sample circuit acquires in insulating surfaces and conducting surface, and damped oscillation sample circuit can only collect this
Two kinds of waveforms can judge the circle number of wheel rotation according to the variation that damped oscillation sample circuit collects waveform, in conjunction with monolithic
The timer of machine can calculate the flow of water meter with nonmagnetic.In the utility model, detected using LC vibrating circuit, detection away from
From length, single-chip microcontroller is required low, it is only necessary to which single-chip microcontroller has timer function, can reduce the cost of single-chip microcontroller.
Scheme as a preference of the above scheme, the shared microcontroller of two damped oscillation sample circuits it is defeated
Outlet, the integrating circuit output end of two damped oscillation sample circuits input terminal different from single-chip microcontroller are connected.Single-chip microcontroller is simultaneously
It controls two damped oscillation sample circuits to be sampled, guarantees that sampling can carry out simultaneously.
Scheme as a preference of the above scheme, the LC charge/discharge control circuit include bi-directional voltage stabilizing pipe D1, field effect
Should pipe Q1 and diode D2, the field-effect tube Q1 grid be connected with the first output end of single-chip microcontroller, field-effect tube Q1 source electrode ground connection
GND, field-effect tube Q1 drain electrode are connected with LC output end of oscillating circuit, and diode D2 anode is connected with field-effect tube Q1 source electrode, and two
Pole pipe D2 cathode and field-effect tube Q1 drain electrode are connected, bi-directional voltage stabilizing diode D1 respectively with the grid of field-effect tube Q1 and source
Extremely it is connected.
Scheme as a preference of the above scheme, the LC excited oscillation control circuit includes field-effect tube Q2, double
To zener diode D3, diode D4 and resistance R1, the field-effect tube Q2 grid is connected with single-chip microcontroller second output terminal, field effect
Should pipe Q2 source electrode be grounded GND, field-effect tube Q2 drain electrode is connected with resistance R1 first end, resistance R1 second end and LC oscillating circuit are defeated
Outlet is connected, and diode D4 anode is connected with field-effect tube Q2 source electrode, and diode D4 cathode is connected with field-effect tube Q2 drain electrode, double
It is connected respectively with the grid of field-effect tube Q2 and source electrode to the both ends zener diode D3.
Scheme as a preference of the above scheme, the LC oscillating circuit include inductance L1 and capacitor C1, inductance L1
Red and capacitor C1 is in parallel, which is connected with single-chip microcontroller third output end, the parallel circuit second end respectively with
The second input terminal of the second input terminal of LC charge/discharge control circuit, the second input terminal of LC excited oscillation control circuit and derivative control circuits
It is connected.
Scheme as a preference of the above scheme, the derivative control circuits include resistance R2, R3, capacitor C2 and three
Pole pipe Q3, the capacitor C2 is in parallel with resistance R3, which is connected with resistance R2 first end, the parallel circuit
Two ends are connected with triode Q3 base stage, and resistance R2 second end is connected with LC oscillating circuit, triode Q3 emitter and single-chip microcontroller the
Three output ends are connected, and triode Q3 collector is connected with integrating circuit input terminal.
Scheme as a preference of the above scheme, the integrating circuit include capacitor C3 and resistance R4, the capacitor
C3 is in parallel with resistance R4, which is connected with derivative control circuits and single-chip microcomputer input respectively, parallel connection electricity
Road second end is grounded GND.
The utility model has the advantages that: it sets there are two damped oscillation sample circuit, detection accuracy is high；Only need single-chip microcontroller
With timer function, single-chip microcontroller requires low；The detecting distance of damped oscillation sample circuit is long, applied widely；Damped oscillation
Sample circuit composition is simple, few using component, at low cost.
Detailed description of the invention
Fig. 1 is a kind of functional block diagram of the utility model.
Fig. 2 is a kind of circuit connection schematic diagram of one of damped oscillation sample circuit in the utility model.
Fig. 3 is LC oscillating circuit generates when damped oscillation sample circuit is in impeller conductive region in the utility model one
Kind waveform diagram.
Fig. 4 is LC oscillating circuit generates when damped oscillation sample circuit is in impeller insulating regions in the utility model one
Kind waveform diagram.
Fig. 5 is that single-chip microcontroller receives damped oscillation sample circuit output waveform in impeller conductive region in the utility model
A kind of waveform diagram.
Fig. 6 is that single-chip microcontroller receives damped oscillation sample circuit output waveform in impeller insulating regions in the utility model
A kind of waveform diagram.
Fig. 7 is a kind of scheme of installation of damped oscillation sample circuit in the utility model.
1- single-chip microcontroller 2- damped oscillation sample circuit 3-LC charge/discharge control circuit 4-LC excited oscillation control circuit 5-LC
Oscillating circuit 6- derivative control circuits 7- integrating circuit 8- impeller.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing being further described to the technical solution of the utility model.
Embodiment:
A kind of water meter with nonmagnetic flow detector of the present embodiment, as shown in Figure 1, including two is set to water meter with nonmagnetic impeller 8
The damped oscillation sample circuit 2 of top and single-chip microcontroller 1 with timer, two damped oscillation sample circuits and the impeller center of circle
Line is mutually perpendicular to, and two damped oscillation sample circuits are connected with single-chip microcontroller, and the damped oscillation sample circuit includes that LC is put
Electric control circuit 3, LC excited oscillation control circuit 4, LC oscillating circuit 5, derivative control circuits 6 and integrating circuit 7, the monolithic
Machine is inputted with LC charge/discharge control circuit first input end, LC excited oscillation control circuit first input end, LC oscillating circuit respectively
End is connected with derivative control circuits first input end, the second input terminal of LC charge/discharge control circuit and LC excited oscillation control circuit the
Two input terminals are connected with LC output end of oscillating circuit, LC output end of oscillating circuit also with derivative control circuits the second input terminal phase
Even, derivative control circuits output end is connected with integrating circuit input terminal, and integrating circuit output end is connected with single-chip microcomputer input.
The output end of the shared microcontroller of two damped oscillation sample circuits, two damped oscillation sample circuits
Integrating circuit output end input terminal different from single-chip microcontroller is connected.Set in the present embodiment one of damped oscillation sample circuit as
Circuit A, another damped oscillation sample circuit are circuit B.
The circuit connection schematic diagram of circuit A, as shown in Fig. 2, LC charge/discharge control circuit includes bi-directional voltage stabilizing pipe D1, field effect
Should pipe Q1 and diode D2, the field-effect tube Q1 grid be connected with the first output end of single-chip microcontroller I/O_1, field-effect tube Q1 source electrode
It is grounded GND, field-effect tube Q1 drain electrode is connected with LC output end of oscillating circuit, diode D2 anode and field-effect tube Q1 source electrode phase
Even, diode D2 cathode and field-effect tube Q1 drain and are connected, bi-directional voltage stabilizing diode D1 grid with field-effect tube Q1 respectively
Pole is connected with source electrode.
The LC excited oscillation control circuit includes field-effect tube Q2, bi-directional voltage stabilizing diode D3, diode D4 and resistance
R1, the field-effect tube Q2 grid are connected with single-chip microcontroller second output terminal I/O_2, and field-effect tube Q2 source electrode is grounded GND, field-effect
Pipe Q2 drain electrode is connected with resistance R1 first end, resistance R1 second end is connected with LC output end of oscillating circuit, diode D4 anode and
Field-effect tube Q2 source electrode is connected, and diode D4 cathode is connected with field-effect tube Q2 drain electrode, the bi-directional voltage stabilizing both ends diode D3 difference
It is connected with the grid of field-effect tube Q2 and source electrode.
The LC oscillating circuit includes inductance L1 and capacitor C1, and inductance L1 is red and capacitor C1 is in parallel, the parallel circuit the
One end is connected with single-chip microcontroller third output end I/O_3, which inputs with LC charge/discharge control circuit second respectively
End, the second input terminal of LC excited oscillation control circuit and the second input terminal of derivative control circuits are connected.
The derivative control circuits include resistance R2, R3, capacitor C2 and triode Q3, the capacitor C2 and resistance R3 simultaneously
Connection, the parallel circuit first end are connected with resistance R2 first end, which is connected with triode Q3 base stage, resistance
R2 second end is connected with LC oscillating circuit, and triode Q3 emitter is connected with single-chip microcontroller third output end I/O_3, triode Q3 collection
Electrode is connected with integrating circuit input terminal.
The integrating circuit includes capacitor C3 and resistance R4, and the capacitor C3 is in parallel with resistance R4, the parallel circuit
One end is connected with derivative control circuits and single-chip microcomputer input I/O_4 respectively, which is grounded GND.In circuit B
Integrating circuit is connected with single-chip microcomputer input I/O_5, and single-chip microcontroller employed in the present embodiment is the single-chip microcontroller of STM8L series,
First output port I/O_1 of the single-chip microcontroller referred in this implementation, second output terminal mouth I/O_2, third output port I/O_3,
Input port I/O_4, input port I/O_5 are simultaneously not specific to a certain specific port in single-chip microcontroller, can select monolithic according to demand
Different I/O mouth in machine.
In the present embodiment, when damped oscillation sample circuit is located above impeller conductive region, electricity is sampled in damped oscillation
The waveform generated at test point T in road is as shown in figure 3, damped oscillation sample circuit is input to waveform such as Fig. 5 of single-chip microcontroller at this time
Shown, the high level lasting time that single-chip microcontroller captures is T1；When damped oscillation sample circuit is located above impeller insulating regions
When, the waveform generated at test point T in damped oscillation sample circuit is as shown in figure 4, damped oscillation sample circuit inputs at this time
To single-chip microcontroller waveform as shown in fig. 6, the high level lasting time that captures of single-chip microcontroller is T2；As shown in fig. 7, the damping vibration
It swings sample circuit to be mounted at the upper 6mm of water meter with nonmagnetic impeller, impeller dash area is conductive region, impeller blank parts in figure
For insulating regions, circuit A is arranged above impeller conductive region, and circuit B is arranged above impeller insulating regions, circuit A and leaf
The straight line that the straight line and circuit B that the wheel center of circle is constituted are constituted with the impeller center of circle is mutually perpendicular to, and single-chip microcontroller is received from circuit A at this time
The duration of high level is T1, and the duration of the high level received from circuit B is T2, as impeller rotates clockwise,
Single-chip microcontroller is from the duration in combination of circuit A, B high level received according to T1, T2, T1, T1, T2, T1, the rule of T2, T2
Circulation change initially receives the level section that high level lasting time group is combined into T1, T2 from single-chip microcontroller after impeller persistently rotates
Combination Shi Qizhi single-chip microcontroller starts reception high level lasting time group and is combined into this period of time of level section combination of T1, T2,
Impeller has rotated 3/4 circle, if single-chip microcontroller controls altogether damped oscillation sampling circuit samples in a period of completing primary above-mentioned variation
40 times, and single-chip microcontroller control damped oscillation sampling circuit samples per second 8 times, then can be obtained according to revolving speed utility model formula
Out, the revolving speed of impeller is 0.15 circle/second in the case of this kind, it is known that wheel speed can easily obtain nothing under present case
The flow of magnetic water meter.
The specific embodiments described herein are merely examples of the spirit of the present invention.Skill belonging to the present invention
The technical staff in art field can make various modifications or additions to the described embodiments or using similar side
Formula substitution, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (7)
1. a kind of water meter with nonmagnetic flow detector, it is characterized in that: including two dampings being set to above water meter with nonmagnetic impeller (8)
Vibrate sample circuit (2) and the single-chip microcontroller (1) with timer, the line phase of two damped oscillation sample circuits and the impeller center of circle
Mutually vertical, two damped oscillation sample circuits are connected with single-chip microcontroller, and the damped oscillation sample circuit includes LC control of discharge
Circuit (3), LC excited oscillation control circuit (4), LC oscillating circuit (5), derivative control circuits (6) and integrating circuit (7), it is described
Single-chip microcontroller respectively with LC charge/discharge control circuit first input end, LC excited oscillation control circuit first input end, LC oscillating circuit
Input terminal is connected with derivative control circuits first input end, the second input terminal of LC charge/discharge control circuit and LC excited oscillation control electricity
The second input terminal of road is connected with LC output end of oscillating circuit, and LC output end of oscillating circuit is also inputted with derivative control circuits second
End is connected, and derivative control circuits output end is connected with integrating circuit input terminal, integrating circuit output end and single-chip microcomputer input phase
Even.
2. a kind of water meter with nonmagnetic flow detector according to claim 1, it is characterized in that: two damped oscillations
The output end of the shared microcontroller of sample circuit, the integrating circuit output end and single-chip microcontroller of two damped oscillation sample circuits are not
It is connected with input terminal.
3. a kind of water meter with nonmagnetic flow detector according to claim, it is characterized in that: the LC control of discharge electricity
Road includes bi-directional voltage stabilizing pipe D1, field-effect tube Q1 and diode D2, the field-effect tube Q1 grid and the first output end of single-chip microcontroller
It is connected, field-effect tube Q1 source electrode is grounded GND, and field-effect tube Q1 drain electrode is connected with LC output end of oscillating circuit, diode D2 anode
It is connected with field-effect tube Q1 source electrode, diode D2 cathode is connected with field-effect tube Q1 drain electrode, bi-directional voltage stabilizing diode D1 point
It is not connected with the grid of field-effect tube Q1 and source electrode.
4. a kind of water meter with nonmagnetic flow detector according to claim 2, it is characterized in that: the LC excited oscillation control
Circuit processed includes field-effect tube Q2, bi-directional voltage stabilizing diode D3, diode D4 and resistance R1, the field-effect tube Q2 grid with
Single-chip microcontroller second output terminal is connected, and field-effect tube Q2 source electrode is grounded GND, and field-effect tube Q2 drain electrode is connected with resistance R1 first end,
Resistance R1 second end is connected with LC output end of oscillating circuit, and diode D4 anode is connected with field-effect tube Q2 source electrode, diode D4
Cathode and field-effect tube Q2 drain electrode are connected, the both ends bi-directional voltage stabilizing diode D3 respectively with the grid of field-effect tube Q2 and source electrode phase
Even.
5. a kind of water meter with nonmagnetic flow detector described according to claim 1 or 3 or 4, it is characterized in that: the LC vibrates
Circuit includes inductance L1 and capacitor C1, and inductance L1 is red and capacitor C1 is in parallel, and the parallel circuit first end and single-chip microcontroller third export
End be connected, the parallel circuit second end respectively with the second input terminal of LC charge/discharge control circuit, LC excited oscillation control circuit second
Input terminal and the second input terminal of derivative control circuits are connected.
6. a kind of water meter with nonmagnetic flow detector according to claim 5, it is characterized in that: the derivative control circuits
Including resistance R2, R3, capacitor C2 and triode Q3, the capacitor C2 is in parallel with resistance R3, the parallel circuit first end and resistance
R2 first end is connected, which is connected with triode Q3 base stage, and resistance R2 second end is connected with LC oscillating circuit,
Triode Q3 emitter is connected with single-chip microcontroller third output end, and triode Q3 collector is connected with integrating circuit input terminal.
7. a kind of water meter with nonmagnetic flow detector according to claim 1 or 6, it is characterized in that: the integrating circuit
Including capacitor C3 and resistance R4, the capacitor C3 is in parallel with resistance R4, the parallel circuit first end respectively with derivative control circuits
It is connected with single-chip microcomputer input, which is grounded GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821813980.7U CN209043378U (en) | 2018-11-05 | 2018-11-05 | A kind of water meter with nonmagnetic flow detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821813980.7U CN209043378U (en) | 2018-11-05 | 2018-11-05 | A kind of water meter with nonmagnetic flow detector |
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| Publication Number | Publication Date |
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| CN209043378U true CN209043378U (en) | 2019-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821813980.7U Active CN209043378U (en) | 2018-11-05 | 2018-11-05 | A kind of water meter with nonmagnetic flow detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274636A (en) * | 2018-11-05 | 2019-09-24 | 杭州绿鲸科技有限公司 | A kind of water meter with nonmagnetic flow detector and method |
-
2018
- 2018-11-05 CN CN201821813980.7U patent/CN209043378U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274636A (en) * | 2018-11-05 | 2019-09-24 | 杭州绿鲸科技有限公司 | A kind of water meter with nonmagnetic flow detector and method |
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Effective date of registration: 20230922 Address after: 310000 room 1201, area a, building 18, hemeyuan, Gongshu District, Hangzhou City, Zhejiang Province Patentee after: LIERDA SCIENCE & TECHNOLOGY GROUP Co.,Ltd. Address before: Room 1301, building 1, 1326 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU GREEN WHALE TECHNOLOGY Co.,Ltd. |