CN219455184U - High-precision plug-in electromagnetic flowmeter - Google Patents
High-precision plug-in electromagnetic flowmeter Download PDFInfo
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- CN219455184U CN219455184U CN202320471504.6U CN202320471504U CN219455184U CN 219455184 U CN219455184 U CN 219455184U CN 202320471504 U CN202320471504 U CN 202320471504U CN 219455184 U CN219455184 U CN 219455184U
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- operational amplifier
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- flow sensor
- adjusting component
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- 238000001514 detection method Methods 0.000 claims abstract description 31
- 230000003750 conditioning effect Effects 0.000 claims abstract description 3
- 239000003990 capacitor Substances 0.000 claims description 27
- 238000005259 measurement Methods 0.000 abstract description 6
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 6
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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Abstract
The utility model discloses a high-precision plug-in electromagnetic flowmeter, which comprises an electromagnetic flow sensor, a signal processing module and a microprocessor, wherein the signal processing module is used for conditioning detection signals of the electromagnetic flow sensor and comprises an amplitude adjusting component, an operational amplifier AR1 and an operational amplifier AR2 which are sequentially connected, the input end of the amplitude adjusting component is connected with the signal output end of the electromagnetic flow sensor, the output end of the operational amplifier AR2 is connected with the microprocessor, and the in-phase input end of the operational amplifier AR2 is also connected with the feedback end of the amplitude adjusting component through a rotary adjusting module; the utility model utilizes the amplitude adjusting component to carry out low-pass noise reduction treatment on the detection signal of the electromagnetic flow sensor, eliminates the influence of external peak noise on the detection signal, and then carries out amplitude stabilization adjustment; the rotary adjusting module effectively inhibits distortion fluctuation of the detection signal and improves measurement accuracy of the plug-in electromagnetic flowmeter.
Description
Technical Field
The utility model relates to the technical field of plug-in electromagnetic flowmeters, in particular to a high-precision plug-in electromagnetic flowmeter.
Background
The electromagnetic flowmeter is an instrument for measuring the flow of the conductive fluid according to the electromotive force induced when the conductive fluid passes through an externally applied magnetic field by applying the electromagnetic induction principle, namely the electromagnetic flowmeter can be used for measuring the flow of the conductive fluid in a closed pipeline and is used for monitoring the flow by utilizing the electromagnetic induction principle. In practical use, the content of impurities in the fluid and the interference of external electromagnetic interference to the electromagnetic flow sensor need to be considered, for example, the patent of the utility model with the application number 201821291844.6 discloses an inserted electromagnetic flowmeter, and the inserted electromagnetic flowmeter is provided with two electromagnetic induction action positions, so that the measured fluid flow data can be mutually compared, the measurement error is reduced, a magnetism isolating material is also selected in the device, so that the influence of an external magnetic field on conductive liquid is avoided, temperature-protecting cotton is used for preserving heat, the damage of fluid freezing to the electromagnetic flowmeter is avoided in a cold environment, and a magnetism isolating metal sleeve is used for isolating the external magnetic field, so that the measurement accuracy is ensured. Although the device has a better protection effect from the mechanical structure, the detection signal of the electromagnetic flow sensor still possibly introduces an interference signal in the transmission line to form common-mode interference, so that display distortion, nonlinearity or large shaking are caused, and the measurement accuracy of the flowmeter is seriously affected.
The present utility model provides a new solution to this problem.
Disclosure of Invention
In view of the foregoing, an object of the present utility model is to provide a high-precision plug-in electromagnetic flowmeter to overcome the drawbacks of the prior art.
The technical scheme for solving the problems is as follows: the utility model provides a high accuracy plug-in type electromagnetic flowmeter, includes electromagnetic flow sensor, signal processing module and microprocessor, signal processing module is used for right electromagnetic flow sensor's detected signal is conditioned, including amplitude adjustment subassembly, operational amplifier AR1 and the operational amplifier AR2 that connect gradually, amplitude adjustment subassembly's input is connected electromagnetic flow sensor's signal output part, operational amplifier AR 2's output is connected microprocessor, operational amplifier AR 2's homophase input still passes through the gyration and adjusts the module and connect amplitude adjustment subassembly's feedback.
Preferably, the amplitude adjusting component comprises an RC filter and an MOS tube Q1, wherein a drain electrode of the MOS tube Q1 is connected with one end of a capacitor C2, and is connected with a signal output end of the electromagnetic flow sensor through the RC filter, and a grid electrode of the MOS tube Q1 is connected with the other end of the capacitor C2 and a feedback end of the amplitude adjusting component through a resistor R3.
Preferably, the RC filter includes resistors R1, R2 and a capacitor C1, where one ends of the resistor R1 and the capacitor C1 are connected to the signal output end of the electromagnetic flow sensor, and the other ends of the resistor R1 and the capacitor C1 are connected to the drain electrode of the MOS transistor Q1 and grounded through the resistor R2.
Preferably, a resistor R5 and a capacitor C3 connected in parallel are disposed between the inverting input terminal and the output terminal of the operational amplifier AR1, the non-inverting input terminal of the operational amplifier AR1 is grounded, the output terminal of the operational amplifier AR1 is connected with the non-inverting input terminal of the operational amplifier AR2 through a resistor R7, and the inverting input terminal and the output terminal of the operational amplifier AR2 are connected with the microprocessor.
Preferably, the rotation adjusting module includes an operational amplifier AR3, an inverting input end of the operational amplifier AR3 is connected with an in-phase input end of an operational amplifier AR2 through a resistor R8, and is connected with an output end of the operational amplifier AR3 through a capacitor C4, the in-phase input end of the operational amplifier AR3 is grounded, an output end of the operational amplifier AR3 is also connected with an emitter of a triode T1 and one end of a resistor R6, a base of the triode T1 is connected with the other end of the resistor R6 and a cathode of a zener diode DZ1, an anode of the zener diode DZ1 is grounded, a collector of the triode T1 is connected with a base of a triode T2 and one end of a capacitor C5, an emitter of the triode T2 is connected with the other end of the capacitor C5, and is grounded through the resistor R4, and a collector of the triode T2 is connected with a feedback end of the amplitude adjusting component.
Preferably, the microprocessor is an STC15 series singlechip.
Through the technical scheme, the utility model has the beneficial effects that:
1. the utility model sets up the signal processing module to condition the detection signal of the electromagnetic flow sensor, utilize the amplitude regulating assembly to carry on the low-pass noise reduction treatment to the detection signal of the electromagnetic flow sensor, dispel the influence of the external spike noise on detection signal, then carry on the steady amplitude regulation;
2. the detection signals are amplified step by utilizing the operational amplifier AR1 and the operational amplifier AR2, the amplified output waveforms of the detection signals are improved by adopting a phase compensation principle, and the detection signals are isolated and output by utilizing a voltage follower principle, so that the anti-interference performance of the flowmeter is further improved;
3. the output signal of the operational amplifier AR1 is sampled and fed back through the rotation adjusting module and acts on the feedback end of the amplitude adjusting component, so that the distortion fluctuation of the detection signal is effectively restrained, and the measuring precision of the plug-in electromagnetic flowmeter is improved.
Drawings
FIG. 1 is a block diagram of a system according to the present utility model.
Fig. 2 is a schematic circuit diagram of the present utility model.
Detailed Description
The foregoing and other features, aspects and advantages of the present utility model will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying figures 1 and 2. The following embodiments are described in detail with reference to the drawings.
Exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the high-precision plug-in electromagnetic flowmeter comprises an electromagnetic flow sensor, a signal processing module and a microprocessor, wherein the signal processing module is used for conditioning detection signals of the electromagnetic flow sensor and comprises an amplitude adjusting component, an operational amplifier AR1 and an operational amplifier AR2 which are sequentially connected, the input end of the amplitude adjusting component is connected with the signal output end of the electromagnetic flow sensor, the output end of the operational amplifier AR2 is connected with the microprocessor, and the in-phase input end of the operational amplifier AR2 is also connected with the feedback end of the amplitude adjusting component through a rotary adjusting module.
In order to improve the measurement accuracy of the plug-in electromagnetic flowmeter, a signal processing module is arranged to condition detection signals of an electromagnetic flow sensor, as shown in fig. 1, an amplitude adjusting component comprises an RC filter and an MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with one end of a capacitor C2 and is connected with the signal output end of the electromagnetic flow sensor through the RC filter, and the grid electrode of the MOS tube Q1 is connected with the other end of the capacitor C2 and the feedback end of the amplitude adjusting component through a resistor R3;
the RC filter comprises resistors R1 and R2 and a capacitor C1, one end of the resistor R1 and one end of the capacitor C1 are connected with a signal output end of the electromagnetic flow sensor, and the other end of the resistor R1 and the other end of the capacitor C1 are connected with a drain electrode of the MOS tube Q1 and are grounded through the resistor R2;
the detection signal of the electromagnetic flow sensor is subjected to low-pass noise reduction treatment through the RC filter, the influence of external peak noise on the detection signal is eliminated, then the detection signal is sent into the MOS tube Q1 for stable amplitude adjustment, and the gate-on voltage of the MOS tube Q1 is subjected to closed-loop feedback adjustment through the rotation adjustment module, so that the effect of restraining signal fluctuation is achieved.
The output signal of the MOS tube Q1 is sequentially sent to an operational amplifier AR1 and an operational amplifier AR2 for step-by-step amplification; a resistor R5 and a capacitor C3 which are connected in parallel are arranged between the inverting input end and the output end of the operational amplifier AR1, the non-inverting input end of the operational amplifier AR1 is grounded, the output end of the operational amplifier AR1 is connected with the non-inverting input end of the operational amplifier AR2 through a resistor R7, and the inverting input end and the output end of the operational amplifier AR2 are connected with the microprocessor; the operational amplifier AR1 is used as a pre-amplifier to increase resistance-capacitance feedback, and the phase compensation principle is utilized to improve the amplified output waveform of the detection signal, so that the stability of the output of the detection signal is greatly improved; then the signal is sent into an operational amplifier AR2 for secondary amplification, and the detection signal is isolated and output by utilizing a voltage follower principle, so that the anti-interference performance of the flowmeter is further improved.
The rotary adjusting module is used for sampling and feedback adjusting an output signal of the operational amplifier AR1, and comprises an operational amplifier AR3, wherein an inverting input end of the operational amplifier AR3 is connected with an in-phase input end of an operational amplifier AR2 through a resistor R8, and is connected with an output end of the operational amplifier AR3 through a capacitor C4, the in-phase input end of the operational amplifier AR3 is grounded, an emitter of a triode T1 and one end of a resistor R6 are also connected with the output end of the operational amplifier AR3, a base electrode of the triode T1 is connected with the other end of the resistor R6 and a cathode of a voltage-stabilizing diode DZ1, an anode of the voltage-stabilizing diode DZ1 is grounded, a collector of the triode T1 is connected with a base electrode of a triode T2 and one end of a capacitor C5, an emitter of the triode T2 is connected with the other end of the capacitor C5, and is grounded through a resistor R4, and a collector of the triode T2 is connected with a feedback end of the amplitude adjusting component;
the output signal of the operational amplifier AR1 is sent to the operational amplifier AR3 for rotation after being split and sampled by a resistor, and an amplified sampling signal is stabilized by a triode voltage stabilizer consisting of a triode T1, a voltage stabilizing diode DZ1 and a resistor R6 in the rotation process, and the triode T2 is driven to be conducted by a signal after the voltage stabilization, so that the current flowing through the triode T2 is guaranteed to have good stability, and the self-stabilizing adjustment capability is good when the detection signal of the electromagnetic flow sensor has distortion fluctuation, so that the stability and the accuracy of the flow detection signal are greatly guaranteed.
When the electromagnetic flowmeter is specifically used, the microprocessor selects STC15 series singlechips, and carries out internal operation processing after carrying out A/D conversion on the detection signals processed by the signal processing module, so as to calculate real-time flow data of the electromagnetic flowmeter;
the utility model sets up the signal processing module to condition the detection signal of the electromagnetic flow sensor, utilize the amplitude regulating assembly to carry on the low-pass noise reduction treatment to the detection signal of the electromagnetic flow sensor, dispel the influence of the external spike noise on detection signal, then carry on the steady amplitude regulation; the detection signals are amplified step by utilizing the operational amplifier AR1 and the operational amplifier AR2, the amplified output waveforms of the detection signals are improved by adopting a phase compensation principle, and the detection signals are isolated and output by utilizing a voltage follower principle, so that the anti-interference performance of the flowmeter is further improved; and finally, sampling and feedback adjustment are carried out on the output signal of the operational amplifier AR1 through a rotation adjustment module, the output signal is acted on the feedback end of the amplitude adjustment assembly, the distortion fluctuation of the detection signal is effectively restrained, and the measurement precision of the plug-in electromagnetic flowmeter is improved.
While the utility model has been described in connection with certain embodiments, it is not intended that the utility model be limited thereto; for those skilled in the art to which the present utility model pertains and the related art, on the premise of based on the technical scheme of the present utility model, the expansion, the operation method and the data replacement should all fall within the protection scope of the present utility model.
Claims (6)
1. The utility model provides a high accuracy plug-in type electromagnetic flowmeter, includes electromagnetic flow sensor, signal processing module and microprocessor, its characterized in that: the signal processing module is used for conditioning detection signals of the electromagnetic flow sensor and comprises an amplitude adjusting component, an operational amplifier AR1 and an operational amplifier AR2 which are sequentially connected, the input end of the amplitude adjusting component is connected with the signal output end of the electromagnetic flow sensor, the output end of the operational amplifier AR2 is connected with the microprocessor, and the in-phase input end of the operational amplifier AR2 is connected with the feedback end of the amplitude adjusting component through a rotation adjusting module.
2. The high-precision plug-in electromagnetic flowmeter of claim 1, wherein: the amplitude adjusting component comprises an RC filter and an MOS tube Q1, wherein the drain electrode of the MOS tube Q1 is connected with one end of a capacitor C2, and is connected with the signal output end of the electromagnetic flow sensor through the RC filter, and the grid electrode of the MOS tube Q1 is connected with the other end of the capacitor C2 and the feedback end of the amplitude adjusting component through a resistor R3.
3. The high-precision plug-in electromagnetic flowmeter of claim 2, wherein: the RC filter comprises resistors R1 and R2 and a capacitor C1, one end of the resistor R1 and one end of the capacitor C1 are connected with a signal output end of the electromagnetic flow sensor, and the other end of the resistor R1 and the other end of the capacitor C1 are connected with a drain electrode of the MOS tube Q1 and are grounded through the resistor R2.
4. A high precision plug-in electromagnetic flowmeter according to claim 2 or 3, wherein: and a resistor R5 and a capacitor C3 which are connected in parallel are arranged between the inverting input end and the output end of the operational amplifier AR1, the non-inverting input end of the operational amplifier AR1 is grounded, the output end of the operational amplifier AR1 is connected with the non-inverting input end of the operational amplifier AR2 through a resistor R7, and the inverting input end and the output end of the operational amplifier AR2 are connected with the microprocessor.
5. The high-accuracy plug-in electromagnetic flowmeter of claim 4, wherein: the rotation adjusting module comprises an operational amplifier AR3, wherein the inverting input end of the operational amplifier AR3 is connected with the non-inverting input end of an operational amplifier AR2 through a resistor R8, the non-inverting input end of the operational amplifier AR3 is connected with the ground through a capacitor C4, the output end of the operational amplifier AR3 is further connected with an emitter of a triode T1 and one end of a resistor R6, a base of the triode T1 is connected with the other end of the resistor R6 and a cathode of a voltage-stabilizing diode DZ1, an anode of the voltage-stabilizing diode DZ1 is grounded, a collector of the triode T1 is connected with a base of a triode T2 and one end of a capacitor C5, an emitter of the triode T2 is connected with the other end of the capacitor C5 and grounded through the resistor R4, and a collector of the triode T2 is connected with a feedback end of the amplitude adjusting component.
6. The high-accuracy plug-in electromagnetic flowmeter of claim 5, wherein: the microprocessor selects STC15 series single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320471504.6U CN219455184U (en) | 2023-03-13 | 2023-03-13 | High-precision plug-in electromagnetic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320471504.6U CN219455184U (en) | 2023-03-13 | 2023-03-13 | High-precision plug-in electromagnetic flowmeter |
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| Publication Number | Publication Date |
|---|---|
| CN219455184U true CN219455184U (en) | 2023-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320471504.6U Active CN219455184U (en) | 2023-03-13 | 2023-03-13 | High-precision plug-in electromagnetic flowmeter |
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| Country | Link |
|---|---|
| CN (1) | CN219455184U (en) |
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2023
- 2023-03-13 CN CN202320471504.6U patent/CN219455184U/en active Active
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