CN216348881U - Ultrasonic water meter flow detection circuit and ultrasonic water meter thereof - Google Patents
Ultrasonic water meter flow detection circuit and ultrasonic water meter thereof Download PDFInfo
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- CN216348881U CN216348881U CN202122449459.8U CN202122449459U CN216348881U CN 216348881 U CN216348881 U CN 216348881U CN 202122449459 U CN202122449459 U CN 202122449459U CN 216348881 U CN216348881 U CN 216348881U
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Abstract
The utility model discloses an ultrasonic water meter flow detection circuit and an ultrasonic water meter thereof, wherein the ultrasonic water meter flow detection circuit comprises a TDC time difference detection module, a change-over switch module and an ultrasonic transducer group, the ultrasonic transducer group comprises a second transducer, a third transducer and a first transducer, the first end of the change-over switch module is connected with the first end of the first transducer, the second transducer is connected with the second end of the change-over switch module, the third end of the change-over switch module is connected with the TDC time difference detection module, the third transducer is connected with the TDC time difference detection module, and the TDC time difference detection module and the change-over switch module are also used for being connected with a main control MCU. According to the technical scheme, time-sharing driving of the ultrasonic water meter can be achieved, accuracy of sound wave flight time is guaranteed, interference of external factors is reduced, and therefore accuracy of flow detection is guaranteed.
Description
Technical Field
The utility model relates to the technical field of ultrasonic water meter detection, in particular to an ultrasonic water meter flow detection circuit and an ultrasonic water meter thereof.
Background
The ultrasonic water meter is a novel water meter which further calculates the flow of the outlet water by detecting the time difference generated by the change of the speed when the ultrasonic sound beam propagates in the downstream and the upstream in the water and analyzing and processing the flow to obtain the flow rate of the outlet water. The inner part has no moving part and no flow resisting element, is not influenced by impurities in water and has long service life. The output communication function is complete, and the requirements of various communications and wireless networking are met.
However, the time reference of the conventional measuring circuit fluctuates due to the influence of factors such as ambient temperature, voltage, electromagnetic interference and the like, and the measurement accuracy of the ultrasonic water meter is adversely affected.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide an ultrasonic water meter flow detection circuit, which aims to realize time-sharing driving of an ultrasonic water meter, guarantee accuracy of sound wave flight time and reduce interference of external factors.
The above problems to be solved by the present invention are achieved by the following technical solutions:
the utility model provides an ultrasonic water meter flow detection circuit, includes TDC time difference detection module, change over switch module and ultrasonic transducer group, the ultrasonic transducer group includes second transducer, third transducer and first transducer, the first end of change over switch module with the first end of first transducer is connected, the second transducer with the second end of change over switch module is connected, the third end of change over switch module with TDC time difference detection module connects, the third transducer with TDC time difference detection module connects, TDC time difference detection module with change over switch module still is used for being connected with main control MCU.
Preferably, the second transducer and the third transducer are at the same horizontal position, and the first transducer is not located on the horizontal line where the second transducer and the third transducer are located.
Preferably, the change-over switch module includes a single-pole double-throw switch, a first fixed end of the single-pole double-throw switch is connected with the second pin of the first transducer, the first pin of the first transducer is grounded, a second fixed end of the single-pole double-throw switch is connected with the second pin of the second transducer, and the first pin of the second transducer is grounded.
Preferably, the TDC time difference detection module includes a TDC chip, the second pin of the third transducer is connected to the fifth pin and the twenty-seventh pin of the TDC chip, respectively, and the first pin of the third transducer is grounded; the control end of the double-pole throw switch is connected with the first pin of the main control MCU, and the common end of the double-pole throw switch is respectively connected with the sixth pin and the thirtieth pin of the TDC chip.
Preferably, a first resistor is arranged on a connecting line between the sixth pin of the TDC chip and the third stationary end of the single-pole double-throw switch, a second capacitor is arranged on a connecting line between the thirtieth pin of the TDC chip and the third stationary end of the single-pole double-throw switch, and the single-pole double-throw switch is connected to a common line between the connecting line where the second capacitor is located and the connecting line where the first resistor is located.
Preferably, a second resistor is arranged on a connecting line between a second pin of the third transducer and a fifth pin of the TDC chip, a third capacitor is arranged on a connecting line between the second pin of the third transducer and a twenty-seventh pin of the TDC chip, and the second pin of the third transducer is connected on a common line between a connecting line where the third capacitor is located and a connecting line where the second resistor is located.
Preferably, the ultrasonic water meter flow detection circuit further comprises a fifth capacitor and a sixth capacitor, the fifth capacitor and the sixth capacitor are connected in parallel, a first common line end between the fifth capacitor and the sixth capacitor is grounded, and a second common line end between the fifth capacitor and the sixth capacitor is grounded and connected with the fourteen pins of the main control MCU respectively.
Preferably, an ultrasonic water meter comprises the ultrasonic water meter flow detection circuit according to any one of the above.
Has the advantages that: according to the technical scheme, the change-over switch module is used as the driving port, so that the first energy converter can transmit sound wave signals to the second energy converter and the third energy converter, the first energy converter can receive the sound wave signals of the second energy converter and the third energy converter, the time of flight that the first ring energy converter respectively transmits the sound wave signals to the second energy converter and the third energy converter and the time of flight that the second energy converter and the third energy converter respectively transmit the sound wave signals to the first energy converter can be detected through the TDC time difference detection module, time-sharing driving of the ultrasonic water meter can be further achieved, accuracy of the sound wave time of flight is guaranteed, interference of external factors is reduced, and accuracy of flow detection is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic electrical schematic block diagram of an embodiment of a flow detection circuit of an ultrasonic water meter according to the present invention.
Fig. 2 is a schematic circuit diagram of an embodiment of a flow detection circuit of an ultrasonic water meter according to the present invention.
The reference numbers illustrate: 100-a master control MCU; 200-TDC time difference detection module; 300-switching the switch module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an ultrasonic water meter flow detection circuit.
As shown in fig. 1, in an embodiment of the present invention, the ultrasonic water meter flow detection circuit; comprises a TDC time difference detection module 200, a change-over switch module 300 and an ultrasonic transducer group, wherein the ultrasonic transducer group comprises a first ultrasonic transducer groupTwo transducers P2A third transducer P3And a first transducer P1A first end of the switcher module 300 and the first transducer P1Is connected to the first end of the second transducer P2The second end of the switch module 300 is connected, the third end of the switch module 300 is connected to the TDC time difference detection module 200, and the third transducer P3The TDC time difference detection module 200 is connected to the TDC time difference detection module 200, and the TDC time difference detection module 200 and the change-over switch module 300 are further configured to be connected to the main control MCU 100.
According to the technical scheme, the change-over switch module is used as the driving port, so that the first energy converter can transmit sound wave signals to the second energy converter and the third energy converter, the first energy converter can receive the sound wave signals of the second energy converter and the third energy converter, the time of flight that the first ring energy converter respectively transmits the sound wave signals to the second energy converter and the third energy converter and the time of flight that the second energy converter and the third energy converter respectively transmit the sound wave signals to the first energy converter can be detected through the TDC time difference detection module, time-sharing driving of the ultrasonic water meter can be further achieved, accuracy of the sound wave time of flight is guaranteed, interference of external factors is reduced, and accuracy of flow detection is guaranteed.
The TDC is a time-to-digital converter, which is a commonly used time interval measuring circuit.
In particular, in the present embodiment, the second transducer P2And said third transducer P3At the same horizontal position, the first transducer P1Not in the second transducer P2And said third transducer P3On the horizontal line; it will also be understood that the second transducer P2A third transducer P3And a first transducer P1In a triangular distribution, and the second transducers P2And said third transducer P3At the same horizontal position.
Specifically, as shown in fig. 2, the change-over switch module 300 includes a single-pole double-throw switch SW1The single-pole double-throw switch SW1And the first transducer P1The first transducer P, the second pin of1The first pin of the switch is grounded, and the single-pole double-throw switch SW1And the second stationary end of the second transducer P2The second transducer P, the second transducer P2The first pin of (a) is grounded.
Specifically, as shown in FIG. 2, the TDC time difference detection module 200 includes a TDC chip, the third transducer P3The second pin of the third transducer P is respectively connected with the fifth pin and the twenty-seventh pin of the TDC chip3The first pin of (2) is grounded; the knife double throw switch SW1The control terminal of the switch is connected with the first pin of the main control MCU100, and the pole double throw switch SW1Are respectively connected with the sixth pin and the thirtieth pin of the TDC chip.
In the present embodiment, the TDC chip may be a TDC-GP30 chip.
Specifically, the second pin, the third pin, the fourth pin, the fifth pin and the sixth pin of the main control MCU100 are respectively connected to the ninth pin, the tenth pin, the eleventh pin, the twelfth pin and the thirteenth pin of the TDC chip.
As shown in fig. 2, the twenty-eighth pin, the thirty-first pin and the fourth pin of the TDC chip are all grounded, and the thirty-first pin of the TDC chip is connected to a live wire.
Specifically, the ultrasonic water meter flow detection circuit further comprises a fifth capacitor C5And a sixth capacitance C6Said fifth capacitor C5And a sixth capacitance C6Are connected in parallel with each other, the fifth capacitor C5And a sixth capacitance C6The first common line terminal between is grounded, and the fifth capacitor C5And a sixth capacitance C6The second common line end between the first common line end and the second common line end is respectively grounded and connected with fourteen pins of the main control MCU 100.
As shown in fig. 2, the sixth pin of the TDC chip and the single-pole double-throw switch SW1The connecting wire of the third fixed end is provided with a first resistor R1Said TDC coreThirtieth pin of sheet and the single-pole double-throw switch SW1The connecting wire of the third fixed end is provided with a second capacitor C2The single-pole double-throw switch SW1Is connected to the second capacitor C2The connecting line and the first resistor R1On the same line of the connecting line.
Wherein, as shown in FIG. 2, the third transducer P3A second resistor R is arranged on a connecting line of the second pin and the fifth pin of the TDC chip2Said third transducer P3A third capacitor C is arranged on a connecting line of the second pin and the twenty-seventh pin of the TDC chip3Said third transducer P3Is connected to the third capacitor C3The connecting line and the second resistor R2On the same line of the connecting line.
The single-pole double-throw switch consists of a movable end and a fixed end, wherein the movable end is a so-called 'pole', and the movable end is connected with an incoming line of a power supply, namely one end of an incoming call, and is generally the end connected with a handle of the switch; the other two terminals are the two terminals of the power supply output, so-called stationary terminals, which are connected to the consumer. The function of the device is that the device can control the power supply to output in two different directions, namely, the device can be used for controlling two devices, or the same device can be controlled to switch the operation direction.
An ultrasonic water meter, including above-mentioned ultrasonic water meter flow detection circuit, the ultrasonic flow detection circuit of this embodiment adopt the ultrasonic flow detection circuit of the above-mentioned embodiment, wherein: the upper computer is connected with the main control MCU of the ultrasonic flow detection circuit and used for sending a flow detection instruction to the main control MCU and receiving and displaying the calculated flow fed back by the main control MCU.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The utility model provides an ultrasonic water meter flow detection circuit, its characterized in that, includes TDC time difference detection module, change over switch module and ultrasonic transducer group, the ultrasonic transducer group includes second transducer, third transducer and first transducer, the first end of change over switch module with the first end of first transducer is connected, the second transducer with the second end of change over switch module is connected, the third end of change over switch module with TDC time difference detection module connects, the third transducer with TDC time difference detection module connects, TDC time difference detection module with the change over switch module still is used for being connected with main control MCU.
2. The flow detection circuit of an ultrasonic water meter according to claim 1, wherein the second transducer and the third transducer are at the same horizontal position, and the first transducer is not at the horizontal line where the second transducer and the third transducer are located.
3. The flow detection circuit of an ultrasonic water meter according to claim 1, wherein the change-over switch module comprises a single-pole double-throw switch, a first fixed end of the single-pole double-throw switch is connected with the second pin of the first transducer, the first pin of the first transducer is grounded, a second fixed end of the single-pole double-throw switch is connected with the second pin of the second transducer, and the first pin of the second transducer is grounded.
4. The flow detection circuit of an ultrasonic water meter according to claim 3, wherein the TDC time difference detection module comprises a TDC chip, the second pin of the third transducer is connected to the fifth pin and the twenty-seventh pin of the TDC chip, respectively, and the first pin of the third transducer is grounded; the control end of the double-pole throw switch is connected with the first pin of the main control MCU, and the common end of the double-pole throw switch is respectively connected with the sixth pin and the thirtieth pin of the TDC chip.
5. The flow detection circuit of an ultrasonic water meter according to claim 4, wherein a first resistor is arranged on a connection line between the sixth pin of the TDC chip and the third stationary end of the single-pole double-throw switch, a second capacitor is arranged on a connection line between the thirtieth pin of the TDC chip and the third stationary end of the single-pole double-throw switch, and the single-pole double-throw switch is connected to a common line between a connection line where the second capacitor is located and a connection line where the first resistor is located.
6. The ultrasonic water meter flow detection circuit according to claim 4, wherein a second resistor is arranged on a connecting line between the second pin of the third transducer and the fifth pin of the TDC chip, a third capacitor is arranged on a connecting line between the second pin of the third transducer and the twenty-seventh pin of the TDC chip, and the second pin of the third transducer is connected on a common line between the connecting line where the third capacitor is located and the connecting line where the second resistor is located.
7. The flow detection circuit of an ultrasonic water meter according to claim 1, further comprising a fifth capacitor and a sixth capacitor, wherein the fifth capacitor and the sixth capacitor are connected in parallel with each other, a first common line end between the fifth capacitor and the sixth capacitor is grounded, and a second common line end between the fifth capacitor and the sixth capacitor is grounded and connected to the fourteen pins of the main control MCU respectively.
8. An ultrasonic water meter comprising the ultrasonic water meter flow sensing circuit of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122449459.8U CN216348881U (en) | 2021-10-11 | 2021-10-11 | Ultrasonic water meter flow detection circuit and ultrasonic water meter thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122449459.8U CN216348881U (en) | 2021-10-11 | 2021-10-11 | Ultrasonic water meter flow detection circuit and ultrasonic water meter thereof |
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| Publication Number | Publication Date |
|---|---|
| CN216348881U true CN216348881U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122449459.8U Active CN216348881U (en) | 2021-10-11 | 2021-10-11 | Ultrasonic water meter flow detection circuit and ultrasonic water meter thereof |
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| Country | Link |
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| CN (1) | CN216348881U (en) |
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- 2021-10-11 CN CN202122449459.8U patent/CN216348881U/en active Active
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