Flow instrument based on ultrasonic time difference method and Doppler fusion

Abstract

The utility model provides a flow instrument based on an ultrasonic time difference method and Doppler fusion. The flow instrument based on the ultrasonic time difference method and Doppler fusion comprises a main control circuit, a time difference method control circuit, a Doppler method control circuit and a transducer module, the signal interaction end of the main control circuit is electrically connected with the first signal interaction end of the time difference method control circuit and the first signal interaction end of the Doppler method control circuit. The second signal interaction end of the time difference method control circuit and the second signal interaction end of the Doppler method control circuit are connected with the signal interaction end of the transducer module.

Description

TECHNICAL FIELD

[0001] The utility model provides a flow gauge based on ultrasonic time difference method and doppler fusion belongs to the technical field of instruments and apparatus. BACKGROUND

[0002] In the field of water conservancy, agricultural irrigation area, urban water supply and drainage, in order to monitor the flow velocity, flow, ultrasonic time difference method flow velocity flow instrument is generally used, or doppler flow velocity flow instrument. Two methods have respective advantages and disadvantages, one of them is that the water impurity, bubble content requirement is not the same, the second time difference method is generally based on stratified speed measurement, and then combined with water level to calculate flow, flow velocity flow is more accurate, and doppler method is point speed measurement, and the accuracy of flow velocity flow depends on correction, and the accuracy is generally not as good as time difference method. In practical application, for the occasion with high accuracy requirement, generally use the instrument of multilayer time difference method, and the instrument is very good in the water body with low impurity and bubble content, but once the impurity and bubble content are high, data cannot be measured. Such as in xinjiang region, the sand content of agricultural irrigation open channel is sometimes very high, so that the time difference method cannot be measured, and the continuous measurement requirement cannot be met. Time difference method must require ultrasonic wave to effectively penetrate water body, so that ultrasonic wave reaches receiving transducer from transmitting transducer, which requires that water impurity and bubble cannot be too much. CONTENT OF THE UTILITY MODEL

[0003] The utility model provides a flow gauge based on ultrasonic time difference method and doppler fusion to solve the technical problems in the prior art, and the technical scheme adopted is as follows:

[0004] A flow gauge based on ultrasonic time difference method and doppler fusion, the flow gauge based on ultrasonic time difference method and doppler fusion includes main control circuit, time difference method control circuit, doppler method control circuit and transducer module, wherein the signal interaction end of the main control circuit is electrically connected with the first signal interaction end of the time difference method control circuit and doppler method control circuit respectively, and the second signal interaction end of the time difference method control circuit and doppler method control circuit is connected with the signal interaction end of the transducer module.

[0005] Further, the time difference method control circuit includes first signal generator, first transducer drive circuit, first sound wave signal capture circuit, first receiving amplifier circuit and time difference measurement circuit.

[0006] The sound wave signal output end of the first signal generator is connected with the sound wave signal input end of the first transducer driving circuit; the driving signal output end of the first transducer driving circuit is connected with the driving signal input end of the transducer module; the first sound wave signal capturing circuit receives sound wave signals in real time, and the signal output end of the first sound wave signal capturing circuit is connected with the signal input end of the first receiving amplification circuit; the signal output end of the first receiving amplification circuit is connected with the time difference signal output end of the time difference measurement circuit and the time difference signal input end of the main control circuit.

[0007] Further, the signal generation control signal output end of the main control circuit is connected with the signal generation control signal input end of the first signal generator.

[0008] Further, the time difference measurement circuit adopts a circuit module with a microcontroller or a digital signal processor as the core.

[0009] Further, the Doppler method control circuit includes a second signal generator, a second transducer driving circuit, a second sound wave signal capturing circuit, a second receiving amplification circuit and a frequency change detection circuit.

[0010] The sound wave signal output end of the second signal generator is connected with the sound wave signal input end of the second transducer driving circuit; the driving signal output end of the second transducer driving circuit is connected with the driving signal input end of the transducer module; the second sound wave signal capturing circuit receives sound wave signals in real time, and the signal output end of the second sound wave signal capturing circuit is connected with the signal input end of the second receiving amplification circuit; the signal output end of the second receiving amplification circuit is connected with the frequency signal output end of the frequency change detection circuit and the time difference signal input end of the main control circuit.

[0011] Further, the signal generation control signal output end of the main control circuit is connected with the signal generation control signal input end of the second signal generator.

[0012] Further, the frequency change detection circuit adopts a circuit module with a microcontroller or a digital signal processor as the core.

[0013] Further, the transducer module includes a time difference method transducer and a Doppler method transducer; the driving signal input end of the time difference method transducer is connected with the driving signal output end of the first transducer driving circuit; the driving signal input end of the Doppler method transducer is connected with the driving signal output end of the second transducer driving circuit.

[0014] Further, the transducer module switching switch and the transducer; wherein the transducer is electrically connected with the time difference method control circuit and the Doppler method control circuit through the transducer module switching switch; the switch control signal input end of the transducer module switching switch is connected with the switch signal output end of the main control circuit.

[0015] The utility model has beneficial effects:

[0016] The utility model discloses a flow instrument based on ultrasonic time difference method and Doppler fusion solves the problem that the existing time difference method product cannot measure under high impurity content water quality, makes the flow stable and continuous, guarantees the production activity to carry out. Combined time difference method (Time-of-Flight, TOF) and Doppler method (Doppler Effect) two ultrasonic measurement technologies. Time difference method calculates the flow velocity by measuring the time difference of ultrasonic wave propagation in the fluid, is suitable for a variety of fluids and flow velocity range. Doppler method is then through the measurement of the change of ultrasonic signal frequency to reflect the motion velocity of the scattering body in the fluid, especially suitable for measuring the fluid containing particles or bubbles. Fusion these two technologies can complement each other's advantages, improve the accuracy and reliability of measurement, especially in complex fluid environment. Through the signal interaction of the time difference method control circuit and the Doppler method control circuit of main control circuit unified management and control, the flow instrument can flexibly switch or simultaneously utilize two measurement modes according to fluid characteristics and measurement requirements, thereby enhancing the adaptability to different fluids and flow velocity conditions. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 For the structure diagram of the flow instrument of the utility model Figure One ;

[0018] Figure 2 For the structure diagram of the time difference method control circuit of the utility model

[0019] Figure 3 For the structure diagram of the Doppler method control circuit of the utility model

[0020] Figure 4 For the structure diagram of the flow instrument of the utility model Figure Two . DETAILED DESCRIPTION

[0021] The preferred embodiments of the utility model are described below in conjunction with the drawings, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0022] The utility model is further described below in conjunction with specific embodiments, but the utility model is not limited by the embodiments.

[0023] In the description of the utility model, it is necessary to explain, the term "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "internal", "external" and "vertical" and so on the direction or position relation indicated is based on the direction or position relation shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and is not the device or element indicated or implied must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the restriction of the utility model.

[0024] In the description of the utility model, it is necessary to explain, unless otherwise specified and limited, the term "installation", "connection", "connection" should be broad understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be direct connection, also can be indirectly connected through intermediate medium, can be the communication inside two components.For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0025] In addition, in the description of the utility model, unless otherwise stated, the meaning of "multiple", "multiple", "multiple" is two or more than two.

[0026] The materials, instruments and methods used in the following embodiments are not specially explained, and are conventional materials, instruments and methods in the art, which can be obtained through commercial channels.

[0027] Example 1,

[0028] A flowmeter based on ultrasonic time difference method and Doppler fusion, the flowmeter based on ultrasonic time difference method and Doppler fusion includes main control circuit, time difference method control circuit, Doppler method control circuit and transducer module;Wherein, the signal interaction end of the main control circuit is respectively connected with the first signal interaction end of the time difference method control circuit and Doppler method control circuit;The second signal interaction end of the time difference method control circuit and Doppler method control circuit is connected with the signal interaction end of the transducer module.

[0029] The time difference method control circuit comprises a first signal generator, a first transducer driving circuit, a first sound wave signal capturing circuit, a first receiving amplification circuit and a time difference measuring circuit. Specifically, the sound wave signal output end of the first signal generator is connected with the sound wave signal input end of the first transducer driving circuit. The driving signal output end of the first transducer driving circuit is connected with the driving signal input end of the transducer module. The first sound wave signal capturing circuit receives sound wave signals in real time, and the signal output end of the first sound wave signal capturing circuit is connected with the signal input end of the first receiving amplification circuit. The signal output end of the first receiving amplification circuit is connected with the time difference signal output end of the time difference measuring circuit and the time difference signal input end of the main control circuit. The signal generation control signal output end of the main control circuit is connected with the signal generation control signal input end of the first signal generator. The time difference measuring circuit adopts a circuit module with a microcontroller or a digital signal processor as a core.

[0030] Meanwhile, the Doppler method control circuit comprises a second signal generator, a second transducer driving circuit, a second sound wave signal capturing circuit, a second receiving amplification circuit and a frequency change detecting circuit. Specifically, the sound wave signal output end of the second signal generator is connected with the sound wave signal input end of the second transducer driving circuit. The driving signal output end of the second transducer driving circuit is connected with the driving signal input end of the transducer module. The second sound wave signal capturing circuit receives sound wave signals in real time, and the signal output end of the second sound wave signal capturing circuit is connected with the signal input end of the second receiving amplification circuit. The signal output end of the second receiving amplification circuit is connected with the frequency signal output end of the frequency change detecting circuit and the time difference signal input end of the main control circuit. The signal generation control signal output end of the main control circuit is connected with the signal generation control signal input end of the second signal generator. The frequency change detecting circuit adopts a circuit module with a microcontroller or a digital signal processor as a core. Furthermore, the transducer module comprises a time difference method transducer and a Doppler method transducer. The driving signal input end of the time difference method transducer is connected with the driving signal output end of the first transducer driving circuit. The driving signal input end of the Doppler method transducer is connected with the driving signal output end of the second transducer driving circuit.

[0031] The flowmeter proposed in this embodiment combines two ultrasonic measurement technologies: time-of-flight (TOF) and Doppler effect. The time-of-flight method calculates the flow rate by measuring the time difference between the propagation of ultrasonic waves in the fluid downstream and upstream, and is applicable to a variety of fluids and flow rate ranges. The Doppler effect reflects the movement speed of scatterers in the fluid by measuring the change in the frequency of the ultrasonic signal, and is particularly suitable for measuring fluids containing particles or bubbles. The fusion of these two technologies can complement each other's advantages and improve the accuracy and reliability of measurement, especially in complex fluid environments. The signal interaction between the time-of-flight control circuit and the Doppler control circuit is uniformly managed and controlled by the main control circuit. The flowmeter can flexibly switch or use the two measurement modes simultaneously according to the fluid characteristics and measurement requirements, thereby enhancing the adaptability to different fluid and flow rate conditions. Both the time-of-flight control circuit and the Doppler control circuit use circuit modules with microcontrollers or digital signal processors as the core. These high-performance processors can efficiently process complex acoustic signals and improve the accuracy and speed of signal capture, amplification and measurement. In particular, the time difference measurement circuit and the frequency change detection circuit can accurately calculate the flow rate information through precise time measurement and frequency analysis. The flow meter adopts a modular design. The main control circuit, time difference control circuit, Doppler control circuit and transducer module are independent of each other but work together, making the system structure clear and easy to maintain and upgrade. The transducer module includes a time difference transducer and a Doppler transducer, which correspond to two measurement technologies respectively. This design facilitates the selection of appropriate transducers according to specific application scenarios and also provides convenience for future technology upgrades. Due to the combination of the two measurement technologies, the flow meter can complete the measurement task in a shorter time, improving the measurement efficiency. At the same time, by optimizing the signal processing and data processing algorithms, the measurement cycle can be further shortened and the real-time performance can be improved.

[0032] In summary, this technical solution improves the accuracy, adaptability and efficiency of flow measurement by integrating the two ultrasonic measurement technologies of time difference method and Doppler method, providing an effective solution for the accurate measurement of fluid flow.

[0033] Example 2

[0034] A flowmeter based on ultrasonic time difference method and Doppler fusion, comprising a main control circuit, a time difference method control circuit, a Doppler method control circuit and a transducer module; wherein the signal interaction end of the main control circuit is electrically connected to the first signal interaction end of the time difference method control circuit and the Doppler method control circuit respectively; the second signal interaction end of the time difference method control circuit and the Doppler method control circuit is connected to the signal interaction end of the transducer module.

[0035] The time difference method control circuit comprises a first signal generator, a first transducer driving circuit, a first sound wave signal capturing circuit, a first receiving amplification circuit and a time difference measuring circuit; specifically, the sound wave signal output end of the first signal generator is connected with the sound wave signal input end of the first transducer driving circuit; the driving signal output end of the first transducer driving circuit is connected with the driving signal input end of the transducer module; the first sound wave signal capturing circuit receives sound wave signals in real time, and the signal output end of the first sound wave signal capturing circuit is connected with the signal input end of the first receiving amplification circuit; the signal output end of the first receiving amplification circuit is connected with the time difference signal output end of the time difference measuring circuit and the time difference signal input end of the main control circuit. The signal generation control signal output end of the main control circuit is connected with the signal generation control signal input end of the first signal generator. Moreover, the time difference measuring circuit adopts a circuit module with a microcontroller or a digital signal processor as a core.

[0036] Meanwhile, the Doppler method control circuit comprises a second signal generator, a second transducer driving circuit, a second sound wave signal capturing circuit, a second receiving amplification circuit and a frequency change detecting circuit; specifically, the sound wave signal output end of the second signal generator is connected with the sound wave signal input end of the second transducer driving circuit; the driving signal output end of the second transducer driving circuit is connected with the driving signal input end of the transducer module; the second sound wave signal capturing circuit receives sound wave signals in real time, and the signal output end of the second sound wave signal capturing circuit is connected with the signal input end of the second receiving amplification circuit; the signal output end of the second receiving amplification circuit is connected with the frequency signal output end of the frequency change detecting circuit and the time difference signal input end of the main control circuit. The signal generation control signal output end of the main control circuit is connected with the signal generation control signal input end of the second signal generator. The frequency change detecting circuit adopts a circuit module with a microcontroller or a digital signal processor as a core. Moreover, the transducer module switching switch and the transducer; wherein the transducer is electrically connected with the time difference method control circuit and the Doppler method control circuit through the transducer module switching switch respectively; the switching control signal input end of the transducer module switching switch is connected with the switching signal output end of the main control circuit.

[0037] The flow meter proposed in this embodiment combines the Time-of-Flight (TOF) and Doppler Effect ultrasonic measurement techniques, and introduces a transducer module switching switch. The transducer module switching switch allows the transducer to be flexibly connected to the TOF control circuit or the Doppler control circuit under the control of the main control circuit. This means that the system can dynamically select the most suitable measurement mode according to the fluid characteristics, measurement requirements or environmental conditions. By selecting the measurement mode that best suits the current measurement environment, the system can provide more accurate measurement results. For example, when the fluid contains a high content of particles or bubbles, the Doppler method may be more accurate; while when the fluid is relatively pure or the flow rate varies greatly, the time difference method may be more suitable. The transducer module switching switch allows a single transducer to serve two different measurement modes, thereby avoiding the need to configure a transducer for each measurement mode. This helps to reduce hardware costs, reduce space occupation, and improve the overall efficiency of the system. By introducing the transducer module switching switch, the system structure becomes more simple and modular. This helps to reduce the complexity and maintenance cost of the system, while improving the reliability and scalability of the system. Due to the introduction of the transducer module switching switch, system upgrades and maintenance become easier. For example, when the transducer needs to be updated or replaced, only the connection of the switching switch needs to be disconnected, without the need to disassemble the entire measurement circuit. The transducer module switching switch allows the system to add new measurement modes or functions as needed in the future. This helps to maintain the advancement and competitiveness of the system, and meets the changing measurement needs.

[0038] In summary, the introduction of the transducer module switching switch and its electrically controlled connection has the technical effects of improving measurement accuracy and adaptability, optimizing resource utilization, simplifying system structure, facilitating system upgrades and maintenance, and enhancing system flexibility. These technical effects collectively improve the overall performance and user experience of the system.

[0039] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Therefore, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A flow meter based on fusion of ultrasonic time-of-flight method and Doppler, characterized in that, The flow meter based on the fusion of the ultrasonic time difference method and Doppler includes a main control circuit, a time difference method control circuit, a Doppler method control circuit and a transducer module; wherein the signal interaction end of the main control circuit is electrically connected with the first signal interaction end of the time difference method control circuit and the Doppler method control circuit; the second signal interaction end of the time difference method control circuit and the Doppler method control circuit is connected with the signal interaction end of the transducer module.

2. The flow meter based on fusion of time-of-flight and Doppler according to claim 1, characterized in that, The time difference method control circuit includes a first signal generator, a first transducer driving circuit, a first sound wave signal capturing circuit, a first receiving amplification circuit and a time difference measurement circuit; wherein the sound wave signal output end of the first signal generator is connected with the sound wave signal input end of the first transducer driving circuit; the driving signal output end of the first transducer driving circuit is connected with the driving signal input end of the transducer module; the first sound wave signal capturing circuit receives sound wave signals in real time, and the signal output end of the first sound wave signal capturing circuit is connected with the signal input end of the first receiving amplification circuit; the signal output end of the first receiving amplification circuit is connected with the time difference signal output end of the time difference measurement circuit and the time difference signal input end of the main control circuit.

3. The flow meter based on fusion of time-of-flight and Doppler according to claim 2, characterized in that, The signal generation control signal output end of the main control circuit is connected with the signal generation control signal input end of the first signal generator.

4. The flow meter based on fusion of time-of-flight and Doppler according to claim 2, wherein, The time difference measurement circuit adopts a circuit module with a microcontroller or a digital signal processor as the core.

5. The flow meter based on fusion of time-of-flight and Doppler according to claim 1, wherein, The Doppler method control circuit includes a second signal generator, a second transducer driving circuit, a second sound wave signal capturing circuit, a second receiving amplification circuit and a frequency change detection circuit; wherein the sound wave signal output end of the second signal generator is connected with the sound wave signal input end of the second transducer driving circuit; the driving signal output end of the second transducer driving circuit is connected with the driving signal input end of the transducer module; the second sound wave signal capturing circuit receives sound wave signals in real time, and the signal output end of the second sound wave signal capturing circuit is connected with the signal input end of the second receiving amplification circuit; the signal output end of the second receiving amplification circuit is connected with the frequency signal output end of the frequency change detection circuit and the time difference signal input end of the main control circuit.

6. The flow meter based on fusion of time-of-flight and Doppler of claim 5, wherein, The signal generation control signal output end of the main control circuit is connected with the signal generation control signal input end of the second signal generator.

7. The flow meter based on fusion of time-of-flight and Doppler of claim 5, wherein, The frequency change detection circuit adopts a circuit module with a microcontroller or a digital signal processor as the core.

8. The flow meter based on fusion of time-of-flight and Doppler according to claim 1, characterized in that, The transducer module includes a time difference method transducer and a Doppler method transducer; wherein the driving signal input end of the time difference method transducer is connected with the driving signal output end of the first transducer driving circuit; the driving signal input end of the Doppler method transducer is connected with the driving signal output end of the second transducer driving circuit.

9. The flow meter based on fusion of time-of-flight and Doppler of claim 1, wherein, The transducer module switching switch and the transducer; wherein the transducer is electrically connected with the time difference method control circuit and the Doppler method control circuit through the transducer module switching switch; and the switch control signal input end of the transducer module switching switch is connected with the switch signal output end of the main control circuit.

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