CN218584123U - Card type ultrasonic flowmeter - Google Patents
Card type ultrasonic flowmeter Download PDFInfo
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- CN218584123U CN218584123U CN202222797448.3U CN202222797448U CN218584123U CN 218584123 U CN218584123 U CN 218584123U CN 202222797448 U CN202222797448 U CN 202222797448U CN 218584123 U CN218584123 U CN 218584123U
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Abstract
The utility model discloses a card formula ultrasonic flowmeter, including ultrasonic transducer, signal conditioning unit and microprocessor, ultrasonic transducer is used for responding to the detection to the fluid flow, and its detected signal sends into handle in the signal conditioning unit, the signal conditioning unit includes compensation regulating circuit and trapped wave regulating circuit, compensation regulating circuit's input is connected ultrasonic transducer's signal output part, compensation regulating circuit's output is connected trapped wave regulating circuit's input, trapped wave regulating circuit's output is connected microprocessor; the utility model enhances the detection signal through the compensation adjusting circuit, effectively improves the output waveform of the detection signal and ensures the precision of the signal detection processing; the trap regulating circuit carries out trap denoising processing on the detection signal, effectively inhibits the intrusion of external high-frequency harmful noise, and improves the detection precision of the flowmeter.
Description
Technical Field
The utility model relates to a flowmeter technical field especially relates to a card formula ultrasonic flowmeter.
Background
As a new measurement technique for measuring a fluid flow by using information on a flow velocity of a fluid carried when an ultrasonic signal propagates through the fluid, an ultrasonic flow measurement technique has been widely used in various fields such as industry and civil use, because of its advantages of non-contact, easy installation and maintenance, no change in a flow state of the fluid, no additional resistance, and the like. The existing card type ultrasonic flowmeter has high intelligent degree, meanwhile, the electromagnetic valve can be configured for constant-speed and quantitative drainage, and a signal transmitter arranged in a display can be used for remote monitoring and control, so that the labor and the time are saved; for example, the utility model patent with application number 202020858096.6, entitled "a card type ultrasonic flowmeter" includes display, ultrasonic transducer and leak-proof seal ring, the liquid in the pipeline flows through the flowmeter, the ultrasonic wave emitted by the ultrasonic transducer is influenced by the fluid, the receiving time of the ultrasonic wave is increased or slowed down, the signal converted by the ultrasonic transducer is calculated by the integrated processor, and the result is displayed on the touch display screen; however, in the practical use process, because the ultrasonic transducer is influenced by external high-frequency interference in the application process, and the detection signal sensed by the transducer is weak, the detection signal is easily annihilated in harmful noise, and the detection precision of the flowmeter is seriously influenced.
So the utility model provides a new scheme solves this problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, an object of the present invention is to provide a card-type ultrasonic flowmeter.
The technical scheme for solving the problem is as follows: the utility model provides a card formula ultrasonic flowmeter, includes ultrasonic transducer, signal conditioning unit and microprocessor, ultrasonic transducer is used for responding to the fluid flow and detects, and its detected signal sends into handle in the signal conditioning unit, the signal conditioning unit is including compensation regulating circuit and trapped wave regulating circuit, compensation regulating circuit's input is connected ultrasonic transducer's signal output part, compensation regulating circuit's output is connected trapped wave regulating circuit's input, trapped wave regulating circuit's output is connected microprocessor.
Preferably, the compensation adjusting circuit includes an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected to the signal output terminal of the ultrasonic transducer through a capacitor C1 and is grounded through a resistor R1, and an inverting input terminal of the operational amplifier AR1 is connected to the output terminal of the operational amplifier AR1 through a resistor R2 and a capacitor C2 which are connected in parallel and is grounded through a resistor R3.
Preferably, the notch adjusting circuit includes an operational amplifier AR2, a non-inverting input terminal of the operational amplifier AR2 is connected to an output terminal of the operational amplifier AR1 through a resistor R4, an inverting input terminal of the operational amplifier AR2 is connected to an output terminal of the operational amplifier AR2 through a notch network component, an output terminal of the operational amplifier AR2 is connected to a cathode of a zener diode DZ1, one end of a capacitor C5 and the microprocessor, and an anode of the zener diode DZ1 and the other end of the capacitor C5 are grounded in parallel.
Preferably, the trap network component includes resistors R5 and R6 and capacitors C3 and C4, one end of the resistor R5 and one end of the capacitor C3 are connected to the inverting input terminal of the operational amplifier AR2, and the other end of the resistor R5 is grounded through the capacitor C4 and is connected to the other end of the capacitor C3 and the output terminal of the operational amplifier AR2 through the resistor R6.
Preferably, the microprocessor selects an STM32F103C8T6 type MCU.
Through the technical scheme, the beneficial effects of the utility model are that: the utility model discloses a set up signal conditioning unit and come to handle ultrasonic transducer's detected signal, come to strengthen the processing to the detected signal through compensating adjustment circuit to effectively improve detected signal output waveform, guarantee signal detection and processing precision; the trap regulating circuit carries out trap denoising processing on the detection signal, effectively inhibits the intrusion of external high-frequency harmful noise, and improves the detection precision of the flowmeter.
Drawings
Fig. 1 is a schematic diagram of the compensation adjustment circuit of the present invention.
FIG. 2 is a schematic diagram of the notch tuning circuit of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying drawings in which fig. 1 through 2 are shown. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The utility model provides a card formula ultrasonic flowmeter, includes ultrasonic transducer, signal conditioning unit and microprocessor, and ultrasonic transducer is used for responding to the fluid flow and detects, and its detected signal sends into handle in the signal conditioning unit, the signal conditioning unit is including compensation regulating circuit and trapped wave regulating circuit, compensation regulating circuit's input is connected ultrasonic transducer's signal output part, compensation regulating circuit's output is connected trapped wave regulating circuit's input, trapped wave regulating circuit's output is connected microprocessor.
As shown in fig. 1, the compensation adjustment circuit includes an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected to the signal output terminal of the ultrasonic transducer through a capacitor C1 and is grounded through a resistor R1, and an inverting input terminal of the operational amplifier AR1 is connected to an output terminal of the operational amplifier AR1 through a resistor R2 and a capacitor C2 connected in parallel and is grounded through a resistor R3.
As shown in fig. 2, the notch adjusting circuit includes an operational amplifier AR2, a non-inverting input terminal of the operational amplifier AR2 is connected to an output terminal of the operational amplifier AR1 through a resistor R4, an inverting input terminal of the operational amplifier AR2 is connected to an output terminal of the operational amplifier AR2 through a notch network component, an output terminal of the operational amplifier AR2 is connected to a cathode of a zener diode DZ1, one end of a capacitor C5 and the microprocessor, and an anode of the zener diode DZ1 and the other end of the capacitor C5 are grounded in parallel.
The trap network component comprises resistors R5 and R6 and capacitors C3 and C4, one ends of the resistor R5 and the capacitor C3 are connected with the inverting input end of the operational amplifier AR2, the other end of the resistor R5 is grounded through the capacitor C4, and the other end of the resistor R6 is connected with the other end of the capacitor C3 and the output end of the operational amplifier AR 2.
The utility model discloses when specifically using, ultrasonic transducer's detected signal is sent into and is handled in the signal conditioning unit, and specifically the processing flow is as follows: firstly, a compensation adjusting circuit adopts an RC high-pass filter consisting of a capacitor C1 and a resistor R1 to filter a detection signal of an ultrasonic transducer, and direct-current interference factors are eliminated; then, the operational amplifier AR1 amplifies the detection signal by using the in-phase amplification principle, negative feedback compensation is introduced in the amplification process, the output waveform of the detection signal can be effectively improved by using the resistance-capacitance phase compensation principle, and the amplification precision can be effectively ensured while the strength of the detection signal is improved; secondly, a trap regulating circuit is adopted to further process the output signal of the operational amplifier AR1, wherein the resistors R5 and R6 and the capacitors C3 and C4 form an RC trap network, the detection signal is subjected to trap noise reduction under the driving of the operational amplifier AR2, the intrusion of external high-frequency harmful noise is effectively inhibited, the accuracy of the detection signal is greatly improved, and finally the detection signal is stably processed by the voltage stabilizing diode DZ1 and the capacitor C5 and then sent into a microprocessor, so that the microprocessor is ensured to accurately and effectively receive the detection signal of the ultrasonic transducer; when the real-time flow rate detection device is specifically set, the microprocessor selects an STM32F103C8T6 type MCU, and performs internal operation processing on detection signals by using the mature data processing technology of the MCU, so that the real-time flow rate is calculated.
In summary, the utility model processes the detection signal of the ultrasonic transducer by arranging the signal conditioning unit, enhances the detection signal by the compensation adjusting circuit, effectively improves the output waveform of the detection signal, and ensures the precision of signal detection processing; the trap regulating circuit carries out trap denoising processing on the detection signal, effectively inhibits the intrusion of external high-frequency harmful noise, and improves the detection precision of the flowmeter.
The above description is provided for further details of the present invention with reference to specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical staff is based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the scope.
Claims (5)
1. The utility model provides a card formula ultrasonic flowmeter, includes ultrasonic transducer, signal conditioning unit and microprocessor, its characterized in that: the ultrasonic transducer is used for sensing and detecting fluid flow, detection signals of the ultrasonic transducer are sent to the signal conditioning unit to be processed, the signal conditioning unit comprises a compensation adjusting circuit and a trap adjusting circuit, the input end of the compensation adjusting circuit is connected with the signal output end of the ultrasonic transducer, the output end of the compensation adjusting circuit is connected with the input end of the trap adjusting circuit, and the output end of the trap adjusting circuit is connected with the microprocessor.
2. The card-type ultrasonic flow meter according to claim 1, wherein: the compensation adjusting circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with the signal output end of the ultrasonic transducer through a capacitor C1 and is grounded through a resistor R1, and the inverting input end of the operational amplifier AR1 is connected with the output end of the operational amplifier AR1 through a resistor R2 and a capacitor C2 which are connected in parallel and is grounded through a resistor R3.
3. The card-type ultrasonic flow meter of claim 2, wherein: the trap regulating circuit comprises an operational amplifier AR2, the non-inverting input end of the operational amplifier AR2 is connected with the output end of the operational amplifier AR1 through a resistor R4, the inverting input end of the operational amplifier AR2 is connected with the output end of the operational amplifier AR2 through a trap network component, the output end of the operational amplifier AR2 is connected with the cathode of a voltage stabilizing diode DZ1, one end of a capacitor C5 and the microprocessor, and the anode of the voltage stabilizing diode DZ1 and the other end of the capacitor C5 are grounded in parallel.
4. The card-type ultrasonic flow meter according to claim 3, wherein: the trap network component comprises resistors R5 and R6 and capacitors C3 and C4, one ends of the resistor R5 and the capacitor C3 are connected with the inverting input end of the operational amplifier AR2, the other end of the resistor R5 is grounded through the capacitor C4, and the other end of the resistor R6 is connected with the other end of the capacitor C3 and the output end of the operational amplifier AR 2.
5. The card-type ultrasonic flow meter according to any one of claims 1 to 4, wherein: and the microprocessor selects an STM32F103C8T6 type MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222797448.3U CN218584123U (en) | 2022-10-24 | 2022-10-24 | Card type ultrasonic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222797448.3U CN218584123U (en) | 2022-10-24 | 2022-10-24 | Card type ultrasonic flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218584123U true CN218584123U (en) | 2023-03-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222797448.3U Active CN218584123U (en) | 2022-10-24 | 2022-10-24 | Card type ultrasonic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218584123U (en) |
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2022
- 2022-10-24 CN CN202222797448.3U patent/CN218584123U/en active Active
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