CN213363900U

CN213363900U - Flow nonmagnetic metering device

Info

Publication number: CN213363900U
Application number: CN202020309341.8U
Authority: CN
Inventors: 陈富光; 毛德兴; 张裕松
Original assignee: Ningbo Water Meter Group Co Ltd
Current assignee: Ningbo Water Meter Group Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2021-06-04
Anticipated expiration: 2030-03-13

Abstract

The utility model discloses a flow nonmagnetic metering device, which comprises a rotating device, a metal sheet and a metering component, wherein the rotating device is driven by a measured fluid to rotate, the metal sheet is arranged on the rotating device and rotates along with the rotation of the rotating device, and the metering component is arranged above the metal sheet and is used for measuring the flow information of the fluid according to the rotation condition of the metal sheet; the metering component comprises a coil layer and an element layer, wherein the coil layer is composed of at least two identical pcb on-board coils and used for converting flow information of fluid into a first signal, a sampling circuit used for acquiring the signal is arranged on the element layer, and each pcb on-board coil in the coil layer independently exists. The utility model discloses a realize the detection to fluid flow through two at least the same and independent pcb board carried coils to calculate fluidic flow through the signal of telecommunication that produces, the consumption is little in the use, and the measurement is accurate, low in production cost moreover.

Description

Flow nonmagnetic metering device

Technical Field

The utility model relates to a fluid does not have the magnetism measurement technical field, especially relates to a flow does not have magnetism metering device.

Background

At present, a magneto-electric sensor is used in an impeller type flowmeter, a magnetic material is installed on an impeller, and the phenomenon of magnetic transmission failure or magnetic loss generally occurs in a strong magnetic field or a high-temperature state, so that the metering precision of the flowmeter is reduced or failed, the stability of equipment cannot be guaranteed, and the sensitivity and reliability of a flow system can be greatly improved by a non-magnetic metering technology, so that people pay extensive attention to the flow system.

However, the non-magnetic metering of the existing I-shaped inductor has the problems of large power consumption, easy interference of an external magnetic field, poor consistency, high processing and production cost and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and propose a flow does not have magnetism metering device, this utility model realizes the detection to fluid flow through two at least the same and independent pcb board carried coil to calculate fluidic flow through the signal of telecommunication that produces, the consumption is little in the use, and the measurement is accurate, low in production cost moreover.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a flow nonmagnetic metering device, which comprises a rotating device, a metal sheet and a metering component, wherein the rotating device is driven by a measured fluid to rotate, the metal sheet is arranged on the rotating device and rotates along with the rotation of the rotating device, and the metering component is arranged above the metal sheet and is used for measuring the flow information of the fluid according to the rotation condition of the metal sheet; the metering component comprises a coil layer and an element layer, wherein the coil layer is composed of at least two identical pcb on-board coils and used for converting flow information of fluid into a first signal, a sampling circuit used for acquiring the signal is arranged on the element layer, and each pcb on-board coil in the coil layer independently exists.

Further, the measurement subassembly still includes middle stratum and sky layer, the measurement subassembly has set gradually component layer, middle stratum, sky layer and coil layer from top to bottom.

Further, the sampling circuit comprises resistors with the same number as the pcb on-board coils, the resistors are connected with the pcb on-board coils in a one-to-one correspondence mode, and the other ends of the resistors are grounded.

Furthermore, the sampling circuit also comprises an excitation circuit, a processing circuit and a processor, wherein the excitation circuit comprises capacitors with the same number as the pcb board-mounted coils, the capacitors are connected with the pcb board-mounted coils in a one-to-one correspondence manner, and the other ends of the capacitors are connected with the processing circuit; the excitation circuit is used for outputting periodic excitation signals, the processing circuit is used for generating second electric signals according to the first electric signals, and one end of the processor is connected with the processing circuit and used for determining flow information of the measured fluid according to the second electric signals.

Further, the processing circuit comprises an amplifying circuit and an RC (resistor-capacitor) charging and discharging circuit, the amplifying circuit comprises triode crystals with the number consistent with that of pcb board-mounted coils, and the triode crystals are connected with the pcb board-mounted coils in a one-to-one correspondence mode and used for amplifying the weak first electric signals; the RC charge-discharge circuit comprises charging circuits with the same number as pcb on-board coils, and each charging circuit is correspondingly connected with the collector of each triode crystal and used for processing signals released by the amplifying circuit and generating second electric signals.

Further, the collector and emitter of each triode transistor are separately connected with the processor and used for receiving a control signal of the processor.

Furthermore, the processor is a single chip microcomputer, an I/O port corresponding to each path of charging circuit is arranged on the single chip microcomputer, and each I/O port outputs periodic high and low levels; the single chip microcomputer is used for determining flow information of the measured fluid.

Further, the sampling circuit further comprises a logic circuit, and the logic circuit is connected with the excitation circuit and used for controlling the on or off of the sampling circuit.

Furthermore, a differential pressure circuit is arranged between the logic circuit and the sampling circuit, one end of the differential pressure circuit is connected with the logic circuit, and the other end of the differential pressure circuit is respectively connected with the triode transistor.

Furthermore, a pulse circuit is arranged between the logic circuit and the processor, and the pulse circuit acts on the on-off of the logic circuit and plays a role of a bridge between the processor and the logic circuit.

Compared with the prior art, the beneficial effects of the utility model are that: the fluid flow is detected through the pcb onboard coils which are at least the same and independent, and the flow of the fluid is calculated through the generated electric signals.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a metering assembly of the present invention;

FIG. 3 is a schematic diagram of the structure of the middle stratum of the present invention;

fig. 4 is a circuit diagram of the middle sampling circuit of the present invention.

Detailed Description

The present invention will now be described in more detail with reference to the accompanying drawings, and it is to be understood that the following description of the present invention is made only by way of illustration and not by way of limitation with reference to the accompanying drawings. The various embodiments may be combined with each other to form other embodiments not shown in the following description.

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected", if any, are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

As shown in fig. 1, the utility model provides a no magnetism metering device of flow, including rotary device 1, sheetmetal 2 and measurement subassembly 3, rotary device 1 is rotated by being surveyed the fluid drive, rotary device 1 can rotate and corresponding clockwise or anticlockwise rotation that carries on according to being surveyed the fluid clockwise or anticlockwise flow direction promptly, sheetmetal 2 is installed on rotary device 1 and rotates along with rotary device 1's rotation, the shape and the size of sheetmetal 2 can set up according to actual demand, measurement subassembly 3 sets up above sheetmetal 2, parallel interval sets up between measurement subassembly 3 and the sheetmetal 2, measurement subassembly 3 is used for surveing the flow information of fluid according to the rotation condition of sheetmetal 2; the metering component 3 comprises a coil layer 4 and an element layer, wherein the coil layer 4 is composed of at least two identical pcb onboard coils and used for converting flow information of fluid into a first signal, the number of turns of the pcb onboard coils can be increased or decreased according to actual requirements, a sampling circuit used for acquiring signals is arranged on the element layer, and each pcb onboard coil in the coil layer 4 independently exists and is not connected with each other.

As shown in fig. 2, in the present embodiment, the number of pcb board-mounted coils is 3, each pcb board-mounted coil is a sector of 120 degrees, and the formed figure is a circle; the number of pcb board-mounted coils determines the size of the metal sheet 2, which metal sheet 2 may be a functional piece matching the size of the rotating device 1 or may be a partially metallized rotating device 1. The metal sheet 2 in this embodiment has a fan shape of 240 degrees.

The metering component 3 further comprises a middle stratum and a hollow layer, the metering component is sequentially provided with an element layer, the middle stratum, the hollow layer and a coil layer 4 from top to bottom, wherein the middle stratum is a metal layer and is used for shielding the interference of an external magnetic field and the upper element layer on the coil layer 4.

As shown in fig. 4, the sampling circuit includes resistors 503 in accordance with the number of pcb-board coils, the resistors 503 are connected in one-to-one correspondence with sampling heads (a1, B1, C1) of the pcb-board coils (A, B, C), and the other ends of the resistors 503 are grounded.

The sampling circuit further comprises an excitation circuit 501, a processing circuit and a processor, wherein the excitation circuit 501 comprises capacitors (CLA, CLB and CLC) with the same number as the pcb on-board coils, the capacitors (CLA, CLB and CLC) are correspondingly connected with the pcb on-board coils (A, B, C) one by one, and the other ends of the capacitors are connected with the processing circuit; the excitation circuit 501 is used for outputting periodic excitation signals, in the embodiment, the excitation signals generated by the excitation circuit 501 are directly excited to resonate and sample in 3 pcb on-board coils (A, B, C), so that the power consumption is low and the production cost is low; the processing circuit is used for generating a second electric signal according to the first electric signal, and one end of the processor is connected with the processing circuit and used for determining the flow information of the measured fluid according to the second electric signal.

The processing circuit comprises an amplifying circuit 504 and an RC charging and discharging circuit 505, the amplifying circuit 504 comprises triode crystals (Q1, Q2 and Q3) with the same number as the pcb on-board coils, and the triode crystals (Q1, Q2 and Q3) are connected with the pcb on-board coils (A, B, C) in a one-to-one correspondence mode and used for amplifying weak first electric signals; the RC charging and discharging circuit 505 comprises charging circuits (CL1, CL2 and CL3) with the same number as the pcb on-board coils, each charging circuit is correspondingly connected with the collector of each triode crystal respectively and used for processing the signal released by the amplifying circuit and generating a second electric signal.

The collector and emitter of each transistor is individually connected to the processor 506 for receiving the control signal from the processor 506.

The processor 506 is a single chip microcomputer, an I/O port corresponding to each path of charging circuit is arranged on the single chip microcomputer, and each I/O port outputs periodic high and low levels; the single chip microcomputer is used for determining flow information of the measured fluid.

The sampling circuit further comprises a logic circuit 508, and the logic circuit 508 is connected to the excitation circuit 501 for controlling the on/off of the sampling circuit.

A differential pressure circuit 507 is arranged between the logic circuit 508 and the sampling circuit, one end of the differential pressure circuit 507 is connected with the logic circuit 508, and the other end of the differential pressure circuit 507 is respectively connected with the triode transistors (Q1, Q2 and Q3).

A pulse circuit 509 is provided between the logic circuit 508 and the processor 506, and the pulse circuit 509 acts on/off of the logic circuit to provide a bridge function between the processor 506 and the logic circuit 508.

In this embodiment, when the metering component 3 operates, the periodically varying excitation signal generates a synchronously varying pulse signal through the logic circuit 508, the three-way excitation circuit 501 receives the pulse signal, acts on three independent pcb on-board coils (A, B, C), and generates an induced electromotive force, when the resistors RL1, RL2, and RL3 are electrically connected to the input/output port I/O of the processor 506, the three input/output ports I/O output high and low levels of a cycle, and when the input/output port I/O outputs high levels, the capacitors CL1, CL2, and CL3 start to charge; when the I/O output of the input/output port is low, the capacitors CL1, CL2 and CL3 start discharging, and at the moment, the I/O pins of the input/output ports of the resistors RL1, RL2 and RL3 are switched from the original output state to the input state. The transistors Q1, Q2 and Q3 are conducted by induction electrodynamic force generated by the pcb on-board coil (A, B, C), the capacitors CL1, CL2 and CL3 start to discharge from the transistors Q1, Q2 and Q3 respectively, and the discharging process is carried out until the induction electromotive force generated by the pcb on-board coil (A, B, C) cannot drive the transistors Q1, Q2 and Q3 to be opened. At the moment, the discharge of the capacitors CL1, CL2 and CL3 is continued, and the discharge is started through three paths of resistors RL1, RL2 and RL3 respectively.

In the process, the induced electromotive force is divided by resistors (R1, R2 and R3), the amplifying circuit 504 amplifies weak signals, when the metal sheet 2 is close to the pcb on-board coil (A, B, C), the harmonic amplitude value of the coil is reduced under the action of the eddy current, so that the induced electromotive force is reduced, the Ib value of the amplifying circuit 504 is influenced, and the processor 506 can judge the change of the fluid flow speed state through the time difference of voltage attenuation.

Because the I/O ports are in the input state at this time, the time T1, T2, and T3 when CL1, CL2, and CL3 are completely discharged can be detected, when the metal sheet 2 approaches A, B, C, the on-time of Q1, Q2, and Q3 is increased, the discharge time of the capacitors CL1, CL2, and CL3 from Q1, Q2, and Q3 is increased, and the time T4, T5, and T6 when CL1, CL2, and CL3 detected by the I/O ports of RL1, RL2, and RL3 are completely discharged is decreased, respectively, and then the following calculation formulas are used to calculate the time T4, T5, and T6

△T1＝T4-T1；

△T2＝T5-T2；

△T3＝T6-T3；

Δ T1 represents the difference between the discharge time of CL1 when metal piece 2 passes pcb board-mounted coil a and the discharge time of capacitor CL1 when no metal piece 2 passes pcb board-mounted coil a; Δ T2 represents the difference between the discharge time of capacitor CL2 when metal piece 2 passes pcb board-mounted coil B and the discharge time of capacitor CL2 when no metal piece 2 passes pcb board-mounted coil B; Δ T3 represents the difference between the discharge time of the capacitor CL3 when the metal piece 2 passes through the pcb on-board coil C and the discharge time of the capacitor CL3 when no metal piece 2 passes through the pcb on-board coil C.

Judging the state of the pcb board-mounted coil A, B, C through delta T1, delta T2 and delta T3, and defining the state as a first state when the metal sheet 2 covers A completely; when the metal sheet 2 covers the B completely, the state is defined as a second state; when the metal sheet 2 covers C completely, the defined state is a third state, the direction and the number of turns of the metal sheet 2 are judged by judging the sequence and the times of the first state, the second state and the third state, the direction and the speed of the measured fluid are judged, and the purpose of metering is achieved.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a nonmagnetic metering device of flow which characterized in that: the device comprises a rotating device, a metal sheet and a metering assembly, wherein the rotating device is driven by a measured fluid to rotate, the metal sheet is arranged on the rotating device and rotates along with the rotation of the rotating device, and the metering assembly is arranged above the metal sheet and is used for measuring the flow information of the fluid according to the rotation condition of the metal sheet; the metering component comprises a coil layer and an element layer, wherein the coil layer is composed of at least two identical pcb on-board coils and used for converting flow information of fluid into a first signal, a sampling circuit used for acquiring the signal is arranged on the element layer, and each pcb on-board coil in the coil layer independently exists.

2. A flow nonmagnetic metering device according to claim 1, characterized in that: the measurement subassembly still includes middle stratum and sky layer, the measurement subassembly has set gradually component layer, middle stratum, sky layer and coil layer from top to bottom.

3. A flow nonmagnetic metering device according to claim 1, characterized in that: the sampling circuit comprises resistors with the same number as the pcb on-board coils, the resistors are connected with the pcb on-board coils in a one-to-one correspondence mode, and the other ends of the resistors are grounded.

4. A flow nonmagnetic metering device according to claim 3, characterized in that: the sampling circuit further comprises an excitation circuit, a processing circuit and a processor, wherein the excitation circuit comprises capacitors with the same number as the pcb on-board coils, the capacitors are connected with the pcb on-board coils in a one-to-one correspondence mode, and the other ends of the capacitors are connected with the processing circuit; the excitation circuit is used for outputting periodic excitation signals, the processing circuit is used for generating second electric signals according to the first electric signals, and one end of the processor is connected with the processing circuit and used for determining flow information of the measured fluid according to the second electric signals.

5. A flow nonmagnetic metering device according to claim 4, characterized in that: the processing circuit comprises an amplifying circuit and an RC (resistor-capacitor) charging and discharging circuit, the amplifying circuit comprises triode crystals with the number consistent with that of pcb on-board coils, and the triode crystals are connected with the pcb on-board coils in a one-to-one correspondence mode and used for amplifying weak first electric signals; the RC charge-discharge circuit comprises charging circuits with the same number as pcb on-board coils, and each charging circuit is correspondingly connected with the collector of each triode crystal and used for processing signals released by the amplifying circuit and generating second electric signals.

6. A flow nonmagnetic metering device according to claim 5, characterized in that: the collector and the emitter of each triode transistor are separately connected with the processor and used for receiving a control signal of the processor.

7. A flow nonmagnetic metering device as in claim 6 wherein: the processor is a single chip microcomputer, an I/O port corresponding to each path of charging circuit is arranged on the single chip microcomputer, and each I/O port outputs periodic high and low levels; the single chip microcomputer is used for determining flow information of the measured fluid.

8. A flow nonmagnetic metering device according to claim 5, characterized in that: the sampling circuit further comprises a logic circuit, and the logic circuit is connected with the exciting circuit and used for controlling the on or off of the sampling circuit.

9. A flow-nonmagnetic metering device as claimed in claim 8, characterized in that: and a differential pressure circuit is arranged between the logic circuit and the sampling circuit, one end of the differential pressure circuit is connected with the logic circuit, and the other end of the differential pressure circuit is respectively connected with the triode transistor.

10. A flow-nonmagnetic metering device as claimed in claim 9, characterized in that: and a pulse circuit is arranged between the logic circuit and the processor, and the pulse circuit acts on the on-off of the logic circuit and plays a role of a bridge between the processor and the logic circuit.