CN217738338U - Ultrasonic flow detection device - Google Patents
Ultrasonic flow detection device Download PDFInfo
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- CN217738338U CN217738338U CN202220972888.5U CN202220972888U CN217738338U CN 217738338 U CN217738338 U CN 217738338U CN 202220972888 U CN202220972888 U CN 202220972888U CN 217738338 U CN217738338 U CN 217738338U
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Abstract
The utility model discloses an ultrasonic flow detection device, including main control chip, signal amplification chip, first transducer, the second transducer, first amplifier circuit and second amplifier circuit, signal amplification chip is used for enlargiing the transmission signal that main control chip sent and transmits to first transducer or second transducer, first amplifier circuit is used for enlargiing the first received signal that first transducer produced and transmits to main control chip, second amplifier circuit is used for enlargiing the second received signal that the second transducer produced and transmits to main control chip, with the problem that the signal attenuation is serious that the solution is measured the bore increase of pipeline and leads to, main control chip carries out state control so that first amplifier circuit and second amplifier circuit carry out signal amplification to first amplifier circuit and second amplifier circuit in time.
Description
Technical Field
The utility model relates to a measuring instrument technical field especially relates to an ultrasonic flow detection device.
Background
The ultrasonic flow detection is to measure the flow by using the propagation characteristics of ultrasonic waves in fluid, wherein ultrasonic waves are generated by a transducer and are propagated in water, the instantaneous flow velocity of the water is calculated by using the time difference of forward and reverse propagation of the ultrasonic waves in the water, and the instantaneous flow and the accumulated flow under different calibers are calculated by combining the time and the cross section area of a pipeline.
At present, two transmitting pins of an ultrasonic flow rate detection chip are respectively connected to an upstream transducer and a downstream transducer for transmitting ultrasonic signals. Ultrasonic signals received by the upstream transducer and the downstream transducer are respectively input to two receiving pins of the ultrasonic flow detection chip for receiving the ultrasonic signals. And when changing the bigger pipeline under test of bore, the transducer interval enlarges, and ultrasonic signal attenuates seriously, and in addition pipeline long-term use back transducer is gone up and is accumulated a large amount of dirt, and received ultrasonic signal amplitude further reduces, leads to the unable accurate fluid velocity of flow that measures.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide an ultrasonic flow detection device to solve the problem that the pipeline adaptability of the prior ultrasonic flow detection device is low.
The purpose of the utility model is realized by adopting the following technical scheme:
an ultrasonic flow detection device comprises a main control chip, a signal amplification chip, a first transducer, a second transducer, a first amplification circuit and a second amplification circuit;
the signal amplification chip is used for amplifying a transmitting signal sent by the main control chip and transmitting the transmitting signal to the first transducer or the second transducer, the first amplification circuit is used for amplifying a first receiving signal generated by the first transducer and transmitting the first receiving signal to the main control chip, the second amplification circuit is used for amplifying a second receiving signal generated by the second transducer and transmitting the second receiving signal to the main control chip, and the main control chip is used for controlling the working state of the first amplification circuit and the working state of the second amplification circuit.
In some optional embodiments, the main control chip has a first transmitting pin and a second transmitting pin, the first transmitting pin is connected to the first transducer through the signal amplifying chip, and the second transmitting pin is connected to the second transducer through the signal amplifying chip.
In some optional embodiments, the main control chip has a first receiving pin and a second receiving pin, the first receiving pin is connected to the first transducer through the first amplifying circuit, and the second receiving pin is connected to the second transducer through the second amplifying circuit.
In some optional embodiments, the main control chip has a first control pin and a second control pin, the first control pin is electrically connected to the first amplification circuit to control the working state of the first amplification circuit, and the second control pin is electrically connected to the second amplification circuit to control the working state of the second amplification circuit.
In some optional embodiments, the first amplifying circuit includes a first operational amplifier, an input of the first operational amplifier is connected to the first transducer, an output of the first operational amplifier is connected to the first receiving pin, and the first operational amplifier further has a first state control pin, and the first control pin is connected to the first state control pin.
In some optional embodiments, the second amplifying circuit includes a second operational amplifier, an input terminal of the second operational amplifier is connected to the second transducer, an output terminal of the second operational amplifier is connected to the second receiving pin, and the second operational amplifier further has a second state control pin, and the second control pin is connected to the second state control pin.
In some optional embodiments, the first amplifying circuit further comprises a first capacitor connected in parallel to a feedback loop of the first operational amplifier.
In some optional embodiments, the second amplifying circuit further comprises a second capacitor connected in parallel to the feedback loop of the second operational amplifier.
In some optional embodiments, the apparatus further comprises a first band-pass filter circuit, and the output terminal of the first operational amplifier is connected to the first receiving pin through the first band-pass filter circuit.
In some optional embodiments, the apparatus further comprises a second band-pass filter circuit, and an output terminal of the second operational amplifier is connected to the second receiving pin through the second band-pass filter circuit.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the signal amplification chip can increase the amplitude of a transmitting signal, the first amplification circuit and the second amplification circuit can amplify a receiving signal so as to solve the problem of serious signal attenuation caused by the increase of the caliber of a detected pipeline, and the main control chip controls the states of the first amplification circuit and the second amplification circuit so that the first amplification circuit and the second amplification circuit can amplify the signal timely.
Drawings
Fig. 1 is a schematic circuit diagram of an ultrasonic flow rate detection device of the utility model;
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
With reference to fig. 1, the ultrasonic flow detecting device of the present invention is schematically shown, and includes a main control chip U5, a signal amplification chip U1, a first transducer U3, a second transducer U4, a first amplification circuit and a second amplification circuit. Preferably, the main control chip U5 is a TDC-GP22 chip.
The signal amplification chip U1 is used for amplifying the transmitting signal sent by the main control chip U5 and transmitting the transmitting signal to the first transducer U3 or the second transducer U4, the signal amplification chip U1 can increase the amplitude of the transmitting signal and output the transmitting signal to the fluid through the first transducer U3 or the second transducer U4, and an ultrasonic signal is formed in the fluid.
The first amplification circuit is used for amplifying a first receiving signal generated by the first transducer U3 and transmitting the first receiving signal to the main control chip U5, the first transducer U3 receives an ultrasonic signal in fluid and converts the ultrasonic signal into a first receiving signal, and the first amplification circuit amplifies the first receiving signal and transmits the first receiving signal to the main control chip U5; similarly, the second amplifying circuit is used for amplifying a second receiving signal generated by the second transducer U4 and transmitting the second receiving signal to the main control chip U5, the second transducer U4 receives an ultrasonic signal in the fluid and converts the ultrasonic signal into a second receiving signal, and the second amplifying circuit amplifies the second receiving signal and transmits the second receiving signal to the main control chip U5, so that the problem of serious signal attenuation caused by the increase of the caliber of the measured pipeline is solved.
In addition, the main control chip U5 is configured to control the operating state of the first amplifying circuit and the operating state of the second amplifying circuit. The operating state of the first amplifying circuit includes a first enabling state and a first disabling state, and the operating state of the second amplifying circuit includes a second enabling state and a second disabling state.
The first transducer U3 is located upstream and the second transducer U4 is located downstream. In the downstream measurement process, the main control chip U5 transmits a transmission signal to the first transducer U3 through the signal amplification chip U1, the first transducer U3 converts an electrical signal into an acoustic signal to generate an ultrasonic signal in the fluid, and meanwhile, the main control chip U5 controls the first amplification circuit to switch the working state, specifically, the working state of the first amplification circuit is switched from a first enabled state to a first disabled state, and at the moment, the first amplification circuit stops working to avoid that a high-amplitude signal enables the first amplification circuit to amplify and saturate, so that when the first amplification circuit needs to amplify the signal, the first amplification circuit is still in a deep saturation state to amplify the signal abnormally; the main control chip U5 controls the second amplifying circuit to switch the working state, specifically, the working state of the second amplifying circuit is switched from the second disabled state to the second enabled state, at this time, the second amplifying circuit starts to work, the second transducer U4 converts the ultrasonic signal (acoustic signal) in the fluid into an electrical signal (second receiving signal) and transmits the electrical signal (second receiving signal) to the second amplifying circuit for amplification, and the second amplifying circuit transmits the amplified second receiving signal to the main control chip U5.
In the countercurrent measurement process, the main control chip U5 transmits a transmitting signal to the second transducer U4 through the signal amplification chip U1, the second transducer U4 converts an electric signal into an acoustic signal to generate an ultrasonic signal in a fluid, meanwhile, the main control chip U5 controls the second amplification circuit to switch the working state, specifically, the working state of the second amplification circuit is switched from a second enabled state to a second disabled state, at the moment, the second amplification circuit stops working to avoid the situation that the second amplification circuit is amplified and saturated by a high-amplitude signal, so that when the second amplification circuit needs to amplify the signal, the second amplification circuit is still in a deep saturation state to enable the signal to be amplified abnormally; the main control chip U5 controls the first amplifying circuit to switch the working state, specifically, the working state of the first amplifying circuit is switched from a first disabled state to a first enabled state, at this time, the first amplifying circuit starts to work, the first transducer U3 converts an ultrasonic signal (acoustic signal) in the fluid into an electric signal (second receiving signal) and transmits the electric signal to the first amplifying circuit for amplification, and the first amplifying circuit transmits the amplified first receiving signal to the main control chip U5.
The main control chip U5 has a first transmitting pin Fire1 and a second transmitting pin Fire2, the first transmitting pin Fire1 is connected with the first transducer U3 through the signal amplifying chip U1, and the second transmitting pin Fire2 is connected with the second transducer U4 through the signal amplifying chip U1. Further, the main control chip U5 has a first receiving pin STOP1 and a second receiving pin STOP2, the first receiving pin STOP1 is connected to the first transducer U3 through a first amplifying circuit, and the second receiving pin STOP2 is connected to the second transducer U4 through a second amplifying circuit.
The main control chip is also provided with a first control pin and a second control pin, the first control pin is electrically connected with the first amplifying circuit to control the working state of the first amplifying circuit, for example, when the first control pin outputs a high level, the working state of the first amplifying circuit is switched from a first forbidden state to a first enabled state, and when the first control pin outputs a low level, the working state of the first amplifying circuit is switched from the first enabled state to the first forbidden state; the second control pin is electrically connected to the second amplifier circuit to control an operating state of the second amplifier circuit, for example, when the second control pin outputs a high level, the operating state of the second amplifier circuit is switched from a second disabled state to a second enabled state, and when the second control pin outputs a low level, the operating state of the second amplifier circuit is switched from the second enabled state to the second disabled state.
Specifically, the first amplifying circuit includes a first operational amplifier U2, an input end of the first operational amplifier U2 is connected to the first transducer U3, an output end of the first operational amplifier U2 is connected to the first receiving pin STOP1, the first operational amplifier U2 is configured to amplify a first receiving signal, the first operational amplifier U2 is further provided with a first state control pin, the first control pin is connected to the first state control pin, and the first control pin can output a high level or a low level to the first state control pin. The first amplifying circuit further comprises a first capacitor C5, and the first capacitor C5 is connected in parallel to the feedback loop of the first operational amplifier U2 to prevent the first amplifying circuit from self-oscillation. Preferably, the ultrasonic flow detection device further includes a first band-pass filter circuit, an output end of the first operational amplifier U2 is connected to the first receiving pin through the first band-pass filter circuit, the first band-pass filter circuit includes a third capacitor C3 and a first resistor R1 connected in series, and a second resistor R2 and a fourth capacitor C4 connected to two ends of the first resistor R1, respectively, the other end of the second resistor R2 and the other end of the fourth capacitor C4 are connected and grounded, the first band-pass filter circuit can eliminate high-frequency and low-frequency noise, capacitance values of the third capacitor C3 and the fourth capacitor C4 affect attenuation values of signals, the larger the third capacitor C3 is, the smaller the fourth capacitor C4 is, the larger the signal output gain value is, and therefore the capacitance value of the third capacitor C3 is obviously larger than the fourth capacitor C4.
The second amplifying circuit comprises a second operational amplifier U6, the input end of the second operational amplifier U6 is connected with the first transducer U4, the output end of the second operational amplifier U6 is connected with a second receiving pin STOP2, the second operational amplifier U6 is used for amplifying a first receiving signal, the second operational amplifier U6 is further provided with a second state control pin, the second control pin is connected with the second state control pin, and the second control pin can output a high level or a low level to the second state control pin. The second amplifying circuit further comprises a second capacitor C13, and the second capacitor C13 is connected in parallel to the feedback loop of the second operational amplifier U6 to prevent the second amplifying circuit from self-oscillation. Preferably, the ultrasonic flow detection device further includes a second band-pass filter circuit, an output end of the second operational amplifier U6 is connected to the second receiving pin through the second band-pass filter circuit, the second band-pass filter circuit includes a fifth capacitor C11 and a third resistor R9 connected in series, and a fourth resistor R11 and a sixth capacitor C12 connected to two ends of the third resistor R9, respectively, the other end of the fourth resistor R11 and the other end of the sixth capacitor C12 are connected and grounded, the second band-pass filter circuit can eliminate high-frequency and low-frequency noise, capacitance values of the fifth capacitor C11 and the sixth capacitor C12 affect attenuation values of signals, the larger the fifth capacitor C11 is, the smaller the sixth capacitor C12 is, the larger the signal output gain value is, and therefore the capacitance value of the fifth capacitor C11 is obviously larger than the sixth capacitor C12.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the signal amplification chip can increase the amplitude of the transmitted signal, the first amplification circuit and the second amplification circuit can amplify the received signal so as to solve the problem of serious signal attenuation caused by the increase of the caliber of the detected pipeline, and the main control chip controls the states of the first amplification circuit and the second amplification circuit so as to enable the first amplification circuit and the second amplification circuit to carry out signal amplification processing in time.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. The ultrasonic flow detection device is characterized by comprising a main control chip, a signal amplification chip, a first transducer, a second transducer, a first amplification circuit and a second amplification circuit;
the signal amplification chip is used for amplifying a transmitting signal sent by the main control chip and transmitting the transmitting signal to the first transducer or the second transducer, the first amplification circuit is used for amplifying a first receiving signal generated by the first transducer and transmitting the first receiving signal to the main control chip, the second amplification circuit is used for amplifying a second receiving signal generated by the second transducer and transmitting the second receiving signal to the main control chip, and the main control chip is used for controlling the working state of the first amplification circuit and the working state of the second amplification circuit.
2. The ultrasonic flow detection device of claim 1, wherein the main control chip has a first transmit pin and a second transmit pin, the first transmit pin is connected with the first transducer through the signal amplification chip, and the second transmit pin is connected with the second transducer through the signal amplification chip.
3. The ultrasonic flow detection device of claim 2, wherein the main control chip has a first receiving pin and a second receiving pin, the first receiving pin is connected with the first transducer through the first amplifying circuit, and the second receiving pin is connected with the second transducer through the second amplifying circuit.
4. The ultrasonic flow detection device of claim 3, wherein the main control chip has a first control pin and a second control pin, the first control pin is electrically connected to the first amplification circuit to control the operating state of the first amplification circuit, and the second control pin is electrically connected to the second amplification circuit to control the operating state of the second amplification circuit.
5. The ultrasonic flow detection device of claim 4, wherein the first amplification circuit comprises a first operational amplifier, an input terminal of the first operational amplifier is connected to the first transducer, an output terminal of the first operational amplifier is connected to the first receiving pin, the first operational amplifier is further provided with a first state control pin, and the first control pin is connected to the first state control pin.
6. The ultrasonic flow detecting device according to claim 4, wherein the second amplifying circuit comprises a second operational amplifier, an input terminal of the second operational amplifier is connected to the second transducer, an output terminal of the second operational amplifier is connected to the second receiving pin, the second operational amplifier is further provided with a second state control pin, and the second control pin is connected to the second state control pin.
7. The ultrasonic flow detection device of claim 5, wherein the first amplification circuit further comprises a first capacitor connected in parallel to a feedback loop of the first operational amplifier.
8. The ultrasonic flow detecting device of claim 6, wherein the second amplifying circuit further comprises a second capacitor connected in parallel to a feedback loop of the second operational amplifier.
9. The ultrasonic flow detection device of claim 5, further comprising a first band-pass filter circuit, wherein the output of the first operational amplifier is connected to the first receive pin through the first band-pass filter circuit.
10. The ultrasonic flow detection device of claim 6, further comprising a second band-pass filter circuit, wherein the output of the second operational amplifier is connected to the second receive pin through the second band-pass filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220972888.5U CN217738338U (en) | 2022-04-22 | 2022-04-22 | Ultrasonic flow detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220972888.5U CN217738338U (en) | 2022-04-22 | 2022-04-22 | Ultrasonic flow detection device |
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| Publication Number | Publication Date |
|---|---|
| CN217738338U true CN217738338U (en) | 2022-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220972888.5U Active CN217738338U (en) | 2022-04-22 | 2022-04-22 | Ultrasonic flow detection device |
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| CN (1) | CN217738338U (en) |
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- 2022-04-22 CN CN202220972888.5U patent/CN217738338U/en active Active
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