CN210426646U - Ultrasonic flow device - Google Patents
Ultrasonic flow device Download PDFInfo
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- CN210426646U CN210426646U CN201921723980.2U CN201921723980U CN210426646U CN 210426646 U CN210426646 U CN 210426646U CN 201921723980 U CN201921723980 U CN 201921723980U CN 210426646 U CN210426646 U CN 210426646U
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Abstract
The utility model relates to a flow measurement technical field, concretely relates to ultrasonic flow device, it mainly includes: a transmitter, an ultrasonic generator, and a first ultrasonic transducer and a second ultrasonic transducer; the ultrasonic generator is connected with the first ultrasonic transducer and the second ultrasonic transducer; an output of the transmitter is connected to the first ultrasonic transducer through a first signal path, the first signal path including a first resistor; one end of a second signal path starts from the first signal path between the output of the transmitter and the first resistor; the second signal path comprises a second resistor, and one end of the second resistor, which is far away from the first resistor, is grounded; the resistance value of the first resistor is smaller than that of the second resistor. The utility model aims to provide a, improve ultrasonic flowmeter's piezoelectric crystal's oscillating property through the device, avoid measuring result to have great stirring.
Description
Technical Field
The utility model relates to a flow measurement technical field, concretely relates to ultrasonic flow device.
Background
In rural decentralized water supply engineering, flow acquisition and analysis are required to be carried out on water flow in each branch pipeline, wherein an ultrasonic flowmeter is a commonly-used sensor and is generally arranged on the outer wall of a pipeline, fluid media in the pipeline cannot be interfered, pressure loss does not exist, the maintenance is convenient, but the measured data of the ultrasonic flowmeter cannot achieve a satisfactory effect under the conditions of small pipe diameter and low flow, and the detected data have large fluctuation under the conditions of unstable temperature, medium performance and fluid flow.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pair of ultrasonic flow device for improve ultrasonic flow meter's piezoelectric crystal's oscillating property, avoid measuring result to have great stirring.
In order to achieve the above object, the present invention provides an ultrasonic flow device, which mainly comprises: a transmitter comprising an ultrasonic generator for generating an alternating excitation signal, and a first ultrasonic transducer and a second ultrasonic transducer; the ultrasonic generator is connected with the first ultrasonic transducer and the second ultrasonic transducer; an output of the transmitter is connected to the first ultrasonic transducer through a first signal path, the first signal path including a first resistor; one end of a second signal path starts from the first signal path between the output of the transmitter and the first resistor; the second signal path comprises a second resistor, and one end of the second resistor, which is far away from the first resistor, is grounded; the resistance value of the first resistor is smaller than that of the second resistor; the power supply also comprises a first power supply, and the first power supply is provided with a first switch; the output end of the transmitter is connected with the first switch.
Preferably, the power supply further comprises a second power supply, and the second power supply is provided with a second switch; the output of the transmitter is disposed between the first switch and the second switch for providing voltages of opposite polarity to the first ultrasonic transducer.
Preferably, a third resistor is arranged between the first resistor and the first signal path; the second signal path is between the first resistance and the third resistance.
Preferably, the ratio of the resistance values of the second resistor and the third resistor is 4: 1 to 15: 1.
Preferably, the ratio of the resistance values of the second resistor to the third resistor is 4.5: 1 to 10: 1.
Preferably, the ultrasonic generator further comprises a multiplexer, the multiplexer is provided with a first electronic measuring instrument, and the first electronic measuring instrument controls the multiplexer and is used for controlling the ultrasonic generator to switch between the first ultrasonic transducer and the second ultrasonic transducer.
The beneficial effects of the utility model reside in that: has a constant output impedance and wherein the transmitter comprises a generator for generating a transmission voltage, the generator having a varying impedance. In particular with a large frequency range, and the impedance of the transmitter should be independent of the impedance of the connected transducer. Which can improve the oscillation performance of a piezoelectric crystal of an ultrasonic flow meter.
Drawings
FIG. 1 is a schematic view of the connection relationship of the components of the present invention;
fig. 2 is a schematic view of the main application scenario of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 and 2, an ultrasonic flow device mainly includes: a transmitter 2, said transmitter 2 comprising an ultrasonic generator for generating an alternating excitation signal, and a first ultrasonic transducer 3 and a second ultrasonic transducer 4; the ultrasonic generator is connected with the first ultrasonic transducer 3 and the second ultrasonic transducer 4; the output 10 of the transmitter 2 is connected to the first ultrasonic transducer 3 via a first signal path comprising a first resistor 16; one end of a second signal path starts from the first signal path between the output 10 of the transmitter 2 and the first resistor 16; the second signal path comprises a second resistor 18, and one end of the second resistor 18 far away from the first resistor 16 is grounded; the resistance value of the first resistor 16 is smaller than that of the second resistor 18; the power supply further comprises a first power supply 11 and a second power supply 12, and the first power supply 11 and the second power supply 12 are respectively provided with a first switch 13 and a second switch 14; the output 10 of the transmitter 2 is arranged between the first switch 13 and the second switch 14 for providing voltages of opposite polarity to the first ultrasonic transducer 3.
A third resistor 19 is arranged between the first resistor 16 and the first signal path; the second signal path is located between the first resistor 16 and the third resistor 19.
The ratio of the resistance values of the second resistor 18 and the third resistor 19 is 4: 1 to 15: 1. The ratio of the resistance values of the second resistor 18 and the third resistor 19 is 4.5: 1 to 10: 1.
The ultrasonic measuring device further comprises a multiplexer 7, wherein the multiplexer 7 is provided with a first electronic measuring instrument 1, and the first electronic measuring instrument 1 controls the multiplexer 7 to control the ultrasonic generator to switch between the first ultrasonic transducer 3 and the second ultrasonic transducer 4.
In the above arrangement, there is a constant output impedance, and wherein the transmitter comprises a generator for generating the transmission voltage, the generator having a varying impedance. In particular with a large frequency range, and the impedance of the transmitter should be independent of the impedance of the connected transducer. Which can improve the oscillation performance of a piezoelectric crystal of an ultrasonic flow meter. Starting from the first electronic measuring device 1, the input signal is formed as a voltage signal by the transmitter 2, the first resistor 16 and the multiplexer 7 to the first transducer 3. The first transducer 3, upon receiving the voltage signal, transmits an ultrasonic signal to the second transducer 4 which is in the receiving state. To switch the first transducer 3 and the second transducer 4 from transmitting to receiving operation, a multiplexer 7 may be provided in connection with the first transducer 3 and the second transducer 4 of the receiver 5 and the transmitter 2. In this case, the second transducer 4 receives the acoustic measurement signal and forwards it in the form of an output voltage via the multiplexer 7 and the receiver 5 to the second electronic measuring instrument 8.
In this case, the acoustic measurement signal is introduced into the measuring tube 6 and the medium located therein and, in this case, is transmitted as so-called burst packets. The second ultrasonic transducer 4 converts the acoustic signal into a voltage signal and transmits the voltage signal to the first electronic measuring instrument 1.
Due to this circuit, a first impedance, the so-called input impedance, is formed between the second electronic measuring device 8 and the first ultrasonic transducer 3. Furthermore, a second impedance, the so-called reception impedance, is present between the second ultrasonic transducer 4 and the second electronic measuring device 8. In this arrangement, this solution is particularly advantageous since the first and second impedances, so-called output and input impedances, are substantially equal in the case of transmission and reception, because the phase stability of the measurement or the zero point of the flow is small and stable.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. An ultrasonic flow device, comprising: a transmitter comprising an ultrasonic generator for generating an alternating excitation signal, and a first ultrasonic transducer and a second ultrasonic transducer; the ultrasonic generator is connected with the first ultrasonic transducer and the second ultrasonic transducer; an output of the transmitter is connected to the first ultrasonic transducer through a first signal path, the first signal path including a first resistor; one end of a second signal path starts from the first signal path between the output of the transmitter and the first resistor; the second signal path comprises a second resistor, and one end of the second resistor, which is far away from the first resistor, is grounded; the resistance value of the first resistor is smaller than that of the second resistor; the transmitter is characterized by further comprising a first power supply, the first power supply is provided with a first switch, and the output end of the transmitter is connected with the first switch.
2. An ultrasonic flow device according to claim 1, wherein: the power supply also comprises a second power supply, and the second power supply is provided with a second switch; the output of the transmitter is disposed between the first switch and the second switch for providing voltages of opposite polarity to the first ultrasonic transducer.
3. An ultrasonic flow device according to claim 2, wherein: a third resistor is arranged between the first resistor and the first signal path; the second signal path is between the first resistance and the third resistance.
4. An ultrasonic flow device according to claim 3, wherein: the ratio of the resistance values of the second resistor and the third resistor is 4: 1 to 15: 1.
5. An ultrasonic flow device according to claim 4, wherein: the ratio of the resistance values of the second resistor and the third resistor is 4.5: 1 to 10: 1.
6. An ultrasonic flow device according to claim 5, wherein: the ultrasonic generator is characterized by further comprising a multiplexer, wherein the multiplexer is provided with a first electronic measuring instrument, and the first electronic measuring instrument controls the multiplexer and is used for controlling the ultrasonic generator to switch between the first ultrasonic transducer and the second ultrasonic transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921723980.2U CN210426646U (en) | 2019-10-15 | 2019-10-15 | Ultrasonic flow device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921723980.2U CN210426646U (en) | 2019-10-15 | 2019-10-15 | Ultrasonic flow device |
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| Publication Number | Publication Date |
|---|---|
| CN210426646U true CN210426646U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921723980.2U Active CN210426646U (en) | 2019-10-15 | 2019-10-15 | Ultrasonic flow device |
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| CN (1) | CN210426646U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114190982A (en) * | 2021-11-03 | 2022-03-18 | 江苏大学 | Ultrasonic flow device for cardiovascular medium flow detection |
-
2019
- 2019-10-15 CN CN201921723980.2U patent/CN210426646U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114190982A (en) * | 2021-11-03 | 2022-03-18 | 江苏大学 | Ultrasonic flow device for cardiovascular medium flow detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An ultrasonic flow device Effective date of registration: 20220125 Granted publication date: 20200428 Pledgee: Bank of China Limited Wuhan Hanyang sub branch Pledgor: Wuhan Xishui Technology Co.,Ltd. Registration number: Y2022420000032 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |