CN213422274U - Card type ultrasonic flowmeter - Google Patents
Card type ultrasonic flowmeter Download PDFInfo
- Publication number
- CN213422274U CN213422274U CN202022331399.5U CN202022331399U CN213422274U CN 213422274 U CN213422274 U CN 213422274U CN 202022331399 U CN202022331399 U CN 202022331399U CN 213422274 U CN213422274 U CN 213422274U
- Authority
- CN
- China
- Prior art keywords
- output end
- circuit
- ultrasonic
- triode
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model discloses card formula ultrasonic flowmeter belongs to detecting instrument technical field, including interconnect's probe and host computer, still include installation department and connecting portion, the cross section of installation department is the annular, and connecting portion are located the annular space of installation department, and the one end setting of connecting portion is at the inner wall of installation department, and the other end rotates and is provided with the probe, and the probe is a pair of, and every probe all includes ultrasonic emission transducer and ultrasonic receiver. Through above-mentioned technical scheme, the bulky problem of ultrasonic flowmeter among the prior art has been solved.
Description
Technical Field
The utility model belongs to the technical field of detecting instrument, a card formula ultrasonic flowmeter is related to.
Background
Since the ultrasonic waves carry information on the flow velocity of the fluid when propagating through the flowing fluid, the flow velocity of the fluid can be detected by the received ultrasonic waves and converted into a flow rate. The ultrasonic flow meters can be classified into different types, such as a propagation velocity difference method, a doppler method, a beam offset method, a noise method, and a correlation method, according to the detection method. At present, the ultrasonic flowmeter in the market is large in size and occupies a large space in installation.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a card formula ultrasonic flowmeter has solved among the prior art problem that ultrasonic flowmeter is bulky.
The utility model adopts the technical proposal that the card type ultrasonic flowmeter comprises a probe and a host which are connected with each other, and also comprises a mounting part and a connecting part, wherein the cross section of the mounting part is annular, the connecting part is positioned in the annular space of the mounting part, one end of the connecting part is arranged on the inner wall of the mounting part, the other end is rotationally provided with the probe,
the probes are a pair, and each probe comprises an ultrasonic transmitting transducer and an ultrasonic receiver.
A driving circuit connected with a controller is arranged in the host, and the output end of the driving circuit is connected with the ultrasonic transmitting transducer; the driving circuit comprises an optical coupling isolation circuit and a power amplification circuit;
the optical coupling isolation circuit comprises a photoelectric coupler U1, the positive input end of the photoelectric coupler U1 is connected with a 3.3V voltage source, the negative input end of the photoelectric coupler U1 is used as the input end of a driving circuit and is connected with the output end of the controller through a resistor R1, the positive output end of the photoelectric coupler U1 is connected with a power amplification circuit, the positive output end of the photoelectric coupler U1 is also connected with the 3.3V voltage source through a resistor R2, and the negative output end of the photoelectric coupler U1 is grounded.
The power amplification circuit comprises a triode Q1, a triode Q2, a power field effect transistor Q3 and a transformer U2;
the base electrodes of the triode Q1 and the triode Q2 are connected with the output end of the optical coupling isolation circuit; the collector of the triode Q1 is connected with a 12V voltage source, the collector of the triode Q2 is grounded, and the emitter of the triode Q1 and the emitter of the triode Q2 are both connected with the grid of the power field effect transistor Q3; the drain electrode of the power field effect transistor Q3 is grounded;
the source electrode of the power field effect transistor Q3 is connected with one end of a transformer U2 primary coil, the other end of the transformer U2 primary coil is connected with a 12V voltage source through a resistor R3, one end of a secondary coil of the transformer U2 is grounded, and the other end of the secondary coil of the transformer U2 is used as the output end of a power amplification circuit and is connected with the ultrasonic transmitting transducer.
One end of the transformer U2 connected with the resistor R3 is also grounded through a capacitor C1.
The ultrasonic receiver is also connected with the controller through a receiving and processing circuit,
the receiving processing circuit comprises a signal amplifying circuit, a band-pass filter circuit and a signal conditioning circuit which are connected in sequence;
the input end of the signal amplification circuit is connected with the output end of the ultrasonic receiver, and the output end of the signal conditioning circuit is connected with the input end of the controller;
the signal amplification circuit comprises an amplifier U3, the non-inverting input end of the amplifier U3 is grounded through a capacitor C2, and the inverting input end of the amplifier U3 is connected with the output end of the ultrasonic receiver through a resistor R4; and a resistor R5 is connected between the negative input end of the amplifier U3 and the output end of the amplifier U3, and the output end of the amplifier U3 is used as the output end of the signal amplification circuit and is connected with the band-pass filter circuit.
Band-pass filter circuit is including inductance L1, resistance R6, resistance R7, the inductance L2 that connects gradually, resistance R6 with the one end that resistance R7 is connected still is connected with inductance L3's one end, inductance L3's other end ground connection, inductance L3's both ends parallel resistance R8.
The utility model discloses a theory of operation and beneficial effect are:
the utility model discloses a flow measurement is carried out to propagation velocity difference method, and the length direction of two probes is parallel with the axial direction of installation department (also be the liquid flow direction simultaneously) during the measurement, and ultrasonic wave transducer transmitter and ultrasonic receiver in two probes set up relatively, are used for measuring respectively through the fluid in the same direction as the difference of propagation velocity in the contrary two directions to ask the flow of liquid.
The probe is rotatably arranged in the annular space of the mounting part, when the probe is not mounted on the pipeline, the probe is rotated, so that the length direction of the probe is parallel to the radial direction of the mounting part, and the probes are all positioned in the annular space of the mounting part, thereby being beneficial to reducing the volume of the flowmeter and being convenient to carry; when needs are installed on the pipeline, rotate the probe, make the length direction of probe and the axial direction parallel of installation department, then pass through flange and pipe connection respectively with two terminal surfaces of installation department, realize the utility model discloses reliable installation on the pipeline, at this moment, the length direction of probe and the axial direction parallel of installation department can carry out liquid flow's measurement.
The present invention will be described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view (non-measurement state) of the present invention;
fig. 2 is a schematic structural diagram (measurement state) of the present invention;
FIG. 3 is a schematic diagram of the optocoupler isolation circuit of the present invention;
FIG. 4 is a schematic diagram of a middle power amplifier circuit according to the present invention;
FIG. 5 is a schematic diagram of a signal amplifying circuit according to the present invention;
fig. 6 is a schematic diagram of the middle band-pass filter circuit of the present invention;
in the figure, 1-main unit, 2-probe, 3-installation part and 4-connection part.
Detailed Description
Referring to the attached drawings 1-2 of the specification, a card type ultrasonic flowmeter comprises a probe and a host which are connected with each other, and further comprises an installation part and a connection part, wherein the cross section of the installation part is annular, the connection part is positioned in the annular space of the installation part, one end of the connection part is arranged on the inner wall of the installation part, the other end of the connection part is rotatably provided with the probe,
the ultrasonic probe comprises a pair of probes, each probe comprises an ultrasonic transmitting transducer and an ultrasonic receiver, the ultrasonic transmitting transducer is used for transmitting an ultrasonic signal, and the ultrasonic receiver is used for receiving the transmitted ultrasonic signal.
In the embodiment, the probe is rotatably arranged in the annular space of the mounting part, when the probe is not mounted on a pipeline, the probe is rotated to enable the length direction of the probe to be parallel to the radial direction of the mounting part, and the probes are all positioned in the annular space of the mounting part, so that the volume of the flowmeter in the embodiment is reduced, and the flowmeter is convenient to carry; when the pipeline is required to be installed, the probe is rotated, the length direction of the probe is parallel to the axial direction of the installation part, then the two end faces of the installation part are respectively connected with the pipeline through the flanges, the reliable installation of the embodiment on the pipeline is realized, at the moment, the length direction of the probe is parallel to the axial direction of the installation part, and the measurement of the liquid flow can be carried out.
Referring to the attached drawings 3-4 of the specification, a driving circuit connected with a controller is arranged in the main machine, and the output end of the driving circuit is connected with the ultrasonic transmitting transducer; the controller generates a digital driving signal, processes the output electric pulse signal through the driving circuit, deactivates the ultrasonic transmitting transducer and controls the ultrasonic transmitting transducer to send out an ultrasonic signal;
the driving circuit comprises an optical coupling isolation circuit and a power amplification circuit;
referring to fig. 3 of the specification, the optical coupling isolation circuit includes a photocoupler U1, a positive input end of the photocoupler U1 is connected to a 3.3V voltage source, a negative input end of the photocoupler U1 is used as an input end of the driving circuit and is connected to an output end of the controller through a resistor R1, a positive output end of the photocoupler U1 is connected to a power amplification circuit, a positive output end of the photocoupler U1 is also connected to the 3.3V voltage source through a resistor R2, and a negative output end of the photocoupler U1 is grounded.
The photoelectric coupler U1 plays a role of isolating voltage, and simultaneously ensures that the output voltage can meet the input condition of the voltage of a post-stage processing circuit, and an alternating current signal generated by the controller needs to be isolated by the photoelectric coupler and then enters a rear power amplification circuit.
Referring to the specification and the attached fig. 4, the power amplifying circuit comprises a transistor Q1, a transistor Q2, a power field effect transistor Q3 and a transformer U2; the transistor Q1 is an NPN-type transistor, and the transistor Q2 is a PNP-type transistor;
the base electrodes of the triode Q1 and the triode Q2 are connected with the output end of the optical coupling isolation circuit; the collector of the triode Q1 is connected with a 12V voltage source, the collector of the triode Q2 is grounded, and the emitter of the triode Q1 and the emitter of the triode Q2 are both connected with the grid of the power field effect transistor Q3; the drain electrode of the power field effect transistor Q3 is grounded;
the source electrode of the power field effect transistor Q3 is connected with one end of a transformer U2 primary coil, the other end of the transformer U2 primary coil is connected with a 12V voltage source through a resistor R3, one end of a secondary coil of the transformer U2 is grounded, and the other end of the secondary coil of the transformer U2 is used as the output end of a power amplification circuit and is connected with the ultrasonic transmitting transducer.
In order to convert electric energy into ultrasonic energy, the ultrasonic sensor must provide an alternating current signal with enough frequency; the triode Q1 is in push-pull connection with the triode Q2, the triode Q1 is in charge of positive half-cycle waveform amplification, the triode Q2 is in charge of negative half-cycle waveform amplification, and when the circuit works, only one of the two triodes is conducted, so that the conduction loss is small, and the efficiency is high; the transistor Q3 is switched on, and the alternating current signal is further raised by the transformer U2 to drive the ultrasonic transmitting transducer to transmit an ultrasonic signal;
one end of the transformer U2, which is connected with the resistor R3, is also grounded through a capacitor C1; the capacitor C1 is a filter capacitor, and improves signal quality.
The ultrasonic receiver is also connected with the controller through a receiving and processing circuit; the ultrasonic signal transmitted by the ultrasonic transmitting transducer passes through the pipe wall and the fluid, the attenuation is large, so that the frequency of the signal received by the ultrasonic receiver is weak, and the ultrasonic receiving and processing circuit obtains a useful signal which is large enough and clean enough after the small signal output by the ultrasonic receiver is fully amplified and filtered, so that the subsequent conditioning and control are facilitated.
The receiving processing circuit comprises a signal amplifying circuit and a band-pass filter circuit which are connected in sequence;
the input end of the signal amplification circuit is connected with the output end of the ultrasonic receiver, and the output end of the signal conditioning circuit is connected with the input end of the controller;
referring to the specification and the attached fig. 5, the signal amplifying circuit comprises an amplifier U3, the non-inverting input terminal of the amplifier U3 is grounded through a capacitor C2, and the inverting input terminal of the amplifier U3 is connected with the output terminal of the ultrasonic receiver through a resistor R4; and a resistor R5 is connected between the negative input end of the amplifier U3 and the output end of the amplifier U3, and the output end of the amplifier U3 is used as the output end of the signal amplification circuit and is connected with the band-pass filter circuit.
Referring to fig. 6 in the specification, the band-pass filter circuit includes an inductor L1, a resistor R6, a resistor R7, and an inductor L2, which are connected in sequence, where one end of the resistor R6 connected to the resistor R7 is further connected to one end of an inductor L3, the other end of the inductor L3 is grounded, and two ends of the inductor L3 are connected in parallel to a resistor R8; the inductor L3 and the resistor R8 form parallel resonance, the inductor L1 and the resistor R6 form series resonance, the inductor L2 and the resistor R7 form series resonance, a T-shaped network is formed wholly, and the band-pass filtering function is achieved.
The signal Ai received by the ultrasonic receiver is amplified by the signal amplifying circuit and filtered by the band-pass filter circuit in sequence and then sent to the controller, so that the controller can read the signal of the ultrasonic receiver accurately, and the detection precision is improved.
Claims (6)
1. The utility model provides a card formula ultrasonic flowmeter, includes interconnect's probe and host computer, its characterized in that: the device also comprises an installation part and a connecting part, the cross section of the installation part is annular, the connecting part is positioned in the annular space of the installation part, one end of the connecting part is arranged on the inner wall of the installation part, the other end is rotatably provided with the probe,
the probes are a pair, and each probe comprises an ultrasonic transmitting transducer and an ultrasonic receiver.
2. The ultrasonic flow meter of claim 1, wherein: a driving circuit connected with a controller is arranged in the host, and the output end of the driving circuit is connected with the ultrasonic transmitting transducer;
the driving circuit comprises an optical coupling isolation circuit and a power amplification circuit;
the optical coupling isolation circuit comprises a photoelectric coupler U1, the positive input end of the photoelectric coupler U1 is connected with a 3.3V voltage source, the negative input end of the photoelectric coupler U1 is used as the input end of a driving circuit and is connected with the output end of the controller through a resistor R1, the positive output end of the photoelectric coupler U1 is connected with a power amplification circuit, the positive output end of the photoelectric coupler U1 is also connected with the 3.3V voltage source through a resistor R2, and the negative output end of the photoelectric coupler U1 is grounded.
3. The ultrasonic flow meter of claim 2, wherein: the power amplification circuit comprises a triode Q1, a triode Q2, a power field effect transistor Q3 and a transformer U2;
the base electrodes of the triode Q1 and the triode Q2 are connected with the output end of the optical coupling isolation circuit; the collector of the triode Q1 is connected with a 12V voltage source, the collector of the triode Q2 is grounded, and the emitter of the triode Q1 and the emitter of the triode Q2 are both connected with the grid of the power field effect transistor Q3; the drain electrode of the power field effect transistor Q3 is grounded;
the source electrode of the power field effect transistor Q3 is connected with one end of a transformer U2 primary coil, the other end of the transformer U2 primary coil is connected with a 12V voltage source through a resistor R3, one end of a secondary coil of the transformer U2 is grounded, and the other end of the secondary coil of the transformer U2 is used as the output end of a power amplification circuit and is connected with the ultrasonic transmitting transducer.
4. The ultrasonic flow meter of claim 3, wherein: one end of the transformer U2 connected with the resistor R3 is also grounded through a capacitor C1.
5. The ultrasonic flow meter of claim 2, wherein: the ultrasonic receiver is also connected with the controller through a receiving and processing circuit,
the receiving processing circuit comprises a signal amplifying circuit, a band-pass filter circuit and a signal conditioning circuit which are connected in sequence;
the input end of the signal amplification circuit is connected with the output end of the ultrasonic receiver, and the output end of the signal conditioning circuit is connected with the input end of the controller;
the signal amplification circuit comprises an amplifier U3, the non-inverting input end of the amplifier U3 is grounded through a capacitor C2, and the inverting input end of the amplifier U3 is connected with the output end of the ultrasonic receiver through a resistor R4; and a resistor R5 is connected between the negative input end of the amplifier U3 and the output end of the amplifier U3, and the output end of the amplifier U3 is used as the output end of the signal amplification circuit and is connected with the band-pass filter circuit.
6. The ultrasonic flow meter of claim 5, wherein: band-pass filter circuit is including inductance L1, resistance R6, resistance R7, the inductance L2 that connects gradually, resistance R6 with the one end that resistance R7 is connected still is connected with inductance L3's one end, inductance L3's other end ground connection, inductance L3's both ends parallel resistance R8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022331399.5U CN213422274U (en) | 2020-10-19 | 2020-10-19 | Card type ultrasonic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022331399.5U CN213422274U (en) | 2020-10-19 | 2020-10-19 | Card type ultrasonic flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213422274U true CN213422274U (en) | 2021-06-11 |
Family
ID=76267892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022331399.5U Active CN213422274U (en) | 2020-10-19 | 2020-10-19 | Card type ultrasonic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213422274U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117109677A (en) * | 2023-10-12 | 2023-11-24 | 唐山大方汇中仪表有限公司 | Mining multichannel ultrasonic flowmeter |
-
2020
- 2020-10-19 CN CN202022331399.5U patent/CN213422274U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117109677A (en) * | 2023-10-12 | 2023-11-24 | 唐山大方汇中仪表有限公司 | Mining multichannel ultrasonic flowmeter |
| CN117109677B (en) * | 2023-10-12 | 2024-05-14 | 唐山大方汇中仪表有限公司 | Mining multichannel ultrasonic flowmeter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102590805B (en) | Ultrasonic circuit system for improving range-measuring accuracy | |
| CN103412049A (en) | Method for monitoring defects of high-temperature steam injection pipeline | |
| CN213422274U (en) | Card type ultrasonic flowmeter | |
| CN106768110A (en) | A kind of inexpensive ultrasonic transducer signal method for fast measuring and circuit | |
| CN103645478A (en) | Ultrasonic distance measuring device | |
| CN115856094A (en) | Multi-channel ultrasonic guided wave detection system based on embedded computer module | |
| CN106706053B (en) | A kind of Ultrasonic Wave Flowmeter signal transmitting and receiving circuit | |
| CN206583498U (en) | A kind of quick measuring circuit of ultrasonic transducer signal | |
| CN102401705A (en) | Measuring method and device of single temperature sensor ultrasonic wave heat | |
| CN102080976A (en) | Wide-range gas flow detector | |
| CN213423073U (en) | Air coupling ultrasonic signal receiving circuit | |
| CN112903043B (en) | Multichannel ultrasonic flowmeter system | |
| CN203311263U (en) | Automatic water-level detecting and tracking apparatus | |
| CN213632258U (en) | Ultrasonic open channel flowmeter | |
| CN111238586A (en) | Electromagnetic flowmeter for measuring low conductivity and rate measuring method thereof | |
| CN213840524U (en) | Multistage monitoring wisdom water utilities pipe-line system | |
| CN212320811U (en) | Portable ultrasonic wave pipeline flow detection device | |
| CN107167627A (en) | A kind of synchronous difference air velocity transducer | |
| CN109323730A (en) | Based on TDC-GP30 double-channel gas ultrasonic flowmeter and application method | |
| CN209728162U (en) | A kind of ultrasonic sensor | |
| CN209656110U (en) | A kind of eight channel lag formula ultrasonic flowmeters | |
| CN110169786B (en) | Ultrasonic driving circuit, driving method and ultrasonic pulmonary function instrument | |
| CN213398257U (en) | Microwave antenna array's metal pipeline internal surface defect detection device | |
| CN103488074B (en) | A kind of amplitude variation signal transit time measurement device | |
| CN111610525A (en) | Automatic pipeline distribution detection system and method based on sound wave transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |