CN218443999U - Ultrasonic flow detection system - Google Patents

Abstract

The present application provides an ultrasonic flow detection system, the system comprising: the ultrasonic testing device comprises a pulse generator, an ultrasonic transmitting sensor, at least two ultrasonic receiving sensors, a fixed seat and a controller; the fixing seat fixes the ultrasonic transmitting sensor and the ultrasonic receiving sensor on the outer wall of the pipeline of the measured fluid at different angles respectively; the pulse generator is used for generating an electric signal of a target frequency, the ultrasonic transmitting sensor is used for transmitting an ultrasonic transmitting signal to the measured fluid, and the ultrasonic receiving sensor is used for receiving an echo signal reflected by the measured fluid; the controller respectively calculates the frequency difference between each echo signal and the ultrasonic wave emission signal so as to obtain the actual flow speed and the actual flow direction of the measured fluid. The flow velocity detection method and the flow velocity detection device solve the technical problems that the detection precision of the existing detection method is low and the measurement process is complicated, achieve flow velocity detection and calculation through a relatively simple device structure, improve the detection precision, and enable the measurement process to be simple.

Description

Ultrasonic flow detection system

Technical Field

The application relates to the technical field of ultrasonic flow detection, in particular to an ultrasonic flow detection system.

Background

Ultrasonic sensors are sensors that convert ultrasonic signals into other energy signals and can be used to measure the flow and velocity of fluids in pipes. The ultrasonic flow detection technology has been widely applied to the fields of industry, national defense, biomedicine and the like, in particular to the blood flow detection in biomedicine.

The ultrasonic flow detection technology is that an ultrasonic transducer is placed on the wall of a pipeline of fluid at a non-vertical angle, ultrasonic signals are transmitted in real time, the ultrasonic signals encounter scatterers in the fluid to generate echo signals, the echo signals are received by the ultrasonic transducer, the received echo signals are influenced by Doppler effect to generate frequency shift due to the fact that the fluid flows at a certain speed, and the moving speed of the fluid can be obtained through backward calculation by calculating the frequency shift. Common flow detection methods comprise a continuous ultrasonic Doppler (CW) method and a pulse Doppler (PW) method, wherein for the continuous ultrasonic Doppler (CW) method, acquired echo information is a scattered echo of all fluid on a path through which an ultrasonic beam passes, the method has no depth resolution capability and is low in detection precision; the blood flow velocity and depth detected by the pulse Doppler PW method are limited by the sampling frequency, and the blood flow velocity and depth can be measured by the aid of ultrasonic images.

Therefore, in the above scheme, the existing flow detection method has low detection accuracy and a complicated measurement process.

SUMMERY OF THE UTILITY MODEL

The application provides an ultrasonic flow detects system realizes accomplishing velocity of flow with simple device structure relatively and detects and calculate, and it is higher and measurement process is simple to detect the precision, the system includes: the ultrasonic testing device comprises a pulse generator, an ultrasonic transmitting sensor, at least two ultrasonic receiving sensors, a fixed seat and a controller;

the pulse generator is connected with the ultrasonic emission sensor; the fixing seat fixes the ultrasonic transmitting sensor and each ultrasonic receiving sensor on the outer wall of the pipeline of the measured fluid at different angles respectively;

the pulse generator is used for generating an electric signal of a target frequency, the ultrasonic transmitting sensor is used for generating an ultrasonic transmitting signal based on the electric signal of the target frequency and transmitting the ultrasonic transmitting signal to the measured fluid, and each ultrasonic receiving sensor is used for receiving an echo signal reflected by the measured fluid;

and the controller is used for respectively calculating the frequency difference between each echo signal and the ultrasonic wave transmitting signal so as to obtain the actual flow speed and the actual flow direction of the measured fluid.

In a possible embodiment, the fixing base is triangular, a first side of the fixing base and an outer wall of the pipe of the measured fluid form a target included angle, the ultrasonic emission sensor is disposed on a second side of the fixing base, and at least two ultrasonic emission sensors are disposed on a third side of the fixing base.

In a possible embodiment, the fixing base is a pyramid, the bottom surface of the fixing base and the outer wall of the pipeline of the measured fluid form a target included angle, the ultrasonic emission sensor is arranged on the target side edge of the fixing base, and at least one ultrasonic emission sensor is arranged on other side edges of the fixing base respectively except the target side edge.

In one possible embodiment, the system further comprises: at least two ultrasound front-end channels and at least two demodulators;

the ultrasonic front-end channels and the demodulators are equal in number to the ultrasonic receiving sensors and correspond to the ultrasonic receiving sensors one by one;

for each of the ultrasonic front-end channels, both ends of the ultrasonic front-end channel are respectively connected with the demodulator and the controller.

In a possible implementation manner, the ultrasonic front-end channel is used for amplifying the echo signals received by the ultrasonic receiving sensor; the demodulator is used for performing IQ demodulation processing on the echo signals after amplification processing so as to obtain demodulation signals corresponding to the echo signals.

In one possible embodiment, the system further comprises: at least two filters; the number of the filters is equal to that of the ultrasonic receiving sensors and corresponds to that of the ultrasonic receiving sensors one by one;

for each filter, both ends of the filter are respectively connected with the demodulator and the controller.

In a possible implementation, the filter is configured to perform a filtering process on the demodulated signal to obtain the filtered demodulated signal.

The technical scheme provided by the application can comprise the following beneficial effects:

the ultrasonic flow detection system comprises: the ultrasonic monitoring device comprises a pulse generator, an ultrasonic transmitting sensor, at least two ultrasonic receiving sensors, a fixed seat and a controller; the fixing seat fixes the ultrasonic transmitting sensor and each ultrasonic receiving sensor on the outer wall of the pipeline of the measured fluid at different angles; the pulse generator is used for generating an electric signal of a target frequency, the ultrasonic transmitting sensor is used for generating an ultrasonic transmitting signal based on the electric signal of the target frequency and transmitting the ultrasonic transmitting signal to the measured fluid, and each ultrasonic receiving sensor is used for receiving an echo signal reflected by the measured fluid; the controller is used for respectively calculating the frequency difference between each echo signal and the ultrasonic wave emission signal so as to obtain the actual flow speed and the actual flow direction of the measured fluid. According to the scheme, the ultrasonic transmitting sensors and the ultrasonic receiving sensors are arranged at different angles and fixed on the outer wall of the pipeline of the measured fluid, so that the flow velocity detection and calculation are completed by a relatively simple device structure, the system integration and miniaturization are further realized, the detection precision is high, and the measurement process is simple.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings used in the detailed description or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic block diagram of an ultrasonic flow detection system according to an exemplary embodiment.

FIG. 2 is a method flow diagram illustrating a method of ultrasonic flow detection according to an exemplary embodiment.

FIG. 3 is a schematic diagram illustrating an angular arrangement of ultrasonic sensors according to an exemplary embodiment.

Fig. 4 is a block diagram showing the structure of an ultrasonic flow detection apparatus according to an exemplary embodiment.

Fig. 5 shows a block diagram of a computer device according to an exemplary embodiment of the present application.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present application, 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 application.

It should be understood that in the description of the embodiments of the present application, the term "correspond" may indicate that there is a direct correspondence or an indirect correspondence between the two, may also indicate that there is an association between the two, and may also indicate and be indicated, configured and configured, and the like.

FIG. 1 is a schematic block diagram of an ultrasonic flow detection system according to an exemplary embodiment. The ultrasonic flow detection system comprises: the ultrasonic testing device comprises a pulse generator, an ultrasonic transmitting sensor, at least two ultrasonic receiving sensors, a fixed seat and a controller;

the pulse generator is connected with the ultrasonic emission sensor; the fixing seat fixes the ultrasonic transmitting sensor and each ultrasonic receiving sensor on the outer wall of the pipeline of the measured fluid at different angles;

the pulse generator is used for generating an electric signal of a target frequency, the ultrasonic transmitting sensor is used for generating an ultrasonic transmitting signal based on the electric signal of the target frequency and transmitting the ultrasonic transmitting signal to the measured fluid, and each ultrasonic receiving sensor is used for receiving an echo signal reflected by the measured fluid;

the controller is configured to calculate a frequency difference between each of the echo signals and the ultrasonic emission signal, so as to obtain an actual flow velocity and an actual flow direction of the measured fluid.

In a possible embodiment, the fixing base is triangular, the first side of the fixing base forms a target included angle with the outer wall of the pipeline of the measured fluid, the ultrasonic emission sensor is arranged on the second side of the fixing base, and at least two ultrasonic emission sensors are arranged on the third side of the fixing base.

In a possible implementation manner, the fixing base is a pyramid, the bottom surface of the fixing base and the outer wall of the pipeline of the measured fluid form a target included angle, the ultrasonic emission sensor is arranged on the target side edge of the fixing base, and at least one ultrasonic emission sensor is respectively arranged on other side edges of the fixing base except the target side edge.

In one possible embodiment, the system further comprises: at least two ultrasound front-end channels and at least two demodulators;

the ultrasonic front-end channels and the demodulators are equal in number to the ultrasonic receiving sensors and are in one-to-one correspondence with the ultrasonic receiving sensors;

for each ultrasonic front-end channel, two ends of the ultrasonic front-end channel are respectively connected with the demodulator and the controller.

In a possible implementation manner, the ultrasonic front-end channel is used for amplifying the echo signals received by the ultrasonic receiving sensor; the demodulator is used for performing IQ demodulation processing on the amplified echo signals to acquire demodulation signals corresponding to the echo signals.

In one possible embodiment, the system further comprises: at least two filters; the number of the filters is equal to that of the ultrasonic receiving sensors and corresponds to that of the ultrasonic receiving sensors one by one;

for each filter, two ends of the filter are respectively connected with the demodulator and the controller.

In a possible implementation, the filter is configured to filter the demodulation signal to obtain the filtered demodulation signal.

Further, the application structure of the ultrasonic flow detection system in the medical field is shown in fig. 1, fig. 1 uses three transducers as an embodiment, the three transducers are respectively an ultrasonic transmitting sensor, a first ultrasonic receiving sensor and a second ultrasonic receiving sensor, the ultrasonic transmitting sensor, the first ultrasonic receiving sensor and the second ultrasonic receiving sensor are respectively fixed above the outer wall of the pipeline of the measured fluid by the fixing base at different angles, at this time, the measured fluid is a blood flow, the outer wall of the pipeline is a blood vessel outer wall, and when measurement is performed, the fixing frame is erected on a human tissue to detect the blood flow condition in the human tissue.

During detection, the controller drives a pulse generator electrically connected with the ultrasonic transmitting sensor to generate an electric signal W1 with a target frequency, the signal is transmitted by a detected fluid and then is received by a first ultrasonic receiving sensor and a second ultrasonic receiving sensor respectively, a first echo signal received by the first ultrasonic receiving sensor is processed and amplified through an ultrasonic front end channel 1, the amplified first echo signal is subjected to IQ demodulation processing through a demodulator 1 to obtain a first demodulation signal, and the first demodulation signal is subjected to filtering operation through a first filter to obtain a filtered first demodulation signal; similarly, a second echo signal received by the second ultrasonic receiving sensor is processed and amplified through the ultrasonic front-end channel 2, the amplified second echo signal is subjected to IQ demodulation processing through the demodulator 2 to obtain a second demodulated signal, and the second demodulated signal is subjected to filtering operation through a second filter to obtain a filtered second demodulated signal.

Then, the controller respectively collects the first demodulation signal after filtering and the second demodulation signal after filtering, respectively calculates a first echo frequency W2 corresponding to the first echo signal and a second echo frequency W3 corresponding to the second echo signal, and calculates the actual flow velocity and the actual flow direction of the measured fluid according to a doppler calculation formula and a frequency difference Δ W21 between the first echo frequency W2 and the electric signal W1 of the target frequency and a frequency difference Δ W31 between the second echo frequency W3 and the electric signal W1 of the target frequency.

Wherein the Doppler calculation formula is

fd denotes a frequency change value, v denotes a velocity of the incident wave, λ denotes a wavelength of the incident wave, and θ denotes an angle between the incident wave and the receptor.

When the number of the fixing frame and the number of the ultrasonic receiving sensors are designed, in order to improve the detection accuracy, the number of the ultrasonic receiving sensors is not limited to two, and the number of the ultrasonic receiving sensors may be increased as needed, for example, the ultrasonic receiving sensors are added in the directions of three axes X, Y, and Z to obtain the actual flow velocity and direction of the fluid to be detected in the three-dimensional space, or whether the Z direction of the velocity vector is aligned to the same plane is determined according to the detection of the echo amplitude, and the direction of the fluid to be detected in the X, Y, and Z spaces is further determined. The echo amplitude refers to the size of a signal (i.e., the echo signal) returned after the ultrasonic wave meets the target, the larger the distance or the larger the deviation, the smaller the size of the returned signal, and whether the detection point is in one plane can be judged according to the size and the deviation degree of the echo. In addition, the actual depth information of the measured fluid can be detected according to the low echo area in the measured fluid, and the position information of the measured fluid can be further determined, wherein the low echo area and the judgment of the echo amplitude are the same, and for the application in the medical field, for example, when the ultrasonic wave meets different tissues, the reflected signal intensity is different, wherein the echo signal is smaller than the tissue when meeting liquid, particularly blood, so that when the change of the echo signal is observed, a section of area which is obviously smaller than the muscle skin tissue exists, and the section can be preliminarily judged as the blood vessel area.

Optionally, the fixing base may be a triangle or a pyramid, when the fixing base is a triangle, the ultrasonic receiving sensor may be disposed on an edge of the triangle, and when the fixing base is a pyramid, the ultrasonic receiving sensor may be disposed on a lateral edge of the pyramid.

Optionally, when the fixing base is a triangle, in order to ensure the detection accuracy, as shown in fig. 1, an included angle between two sides of the triangle for arranging the ultrasonic transmitting sensor and the ultrasonic receiving sensor is an obtuse angle. This fixing base is fixed this supersound transmitting transducer and each supersound receiving transducer respectively with different angles on being surveyed the pipeline outer wall of fluid, and can be as required X, Y, it detects to increase a plurality of supersound receiving transducers in the triaxial direction of Z, through with the configuration and the vector synthesis calculation of supersound receiving transducer with different angles, in medical science field, it accomplishes blood flow detection and calculation through system architecture and equipment simple relatively to have realized, make wearing equipment become possible, can realize the long-time monitoring of blood flow, and then reach the long-time purpose that detects health and physiological index, use scene has further been widened.

Furthermore, besides biomedicine, the ultrasonic flow detection system can also be applied to other fields, such as industry, national defense and the like, and when in detection, the ultrasonic transmitting sensor and each ultrasonic receiving sensor are directly fixed on the outer wall of the pipeline of the detected fluid at different angles by the fixing seat respectively so as to detect the detected fluid in the pipeline.

In summary, the ultrasonic flow detection system comprises: the ultrasonic testing device comprises a pulse generator, an ultrasonic transmitting sensor, at least two ultrasonic receiving sensors, a fixed seat and a controller; the fixing seat fixes the ultrasonic transmitting sensor and each ultrasonic receiving sensor on the outer wall of the pipeline of the measured fluid at different angles; the pulse generator is used for generating an electric signal of a target frequency, the ultrasonic transmitting sensor is used for generating an ultrasonic transmitting signal based on the electric signal of the target frequency and transmitting the ultrasonic transmitting signal to the measured fluid, and each ultrasonic receiving sensor is used for receiving an echo signal reflected by the measured fluid; the controller is used for respectively calculating the frequency difference between each echo signal and the ultrasonic wave transmitting signal so as to obtain the actual flow speed and the actual flow direction of the measured fluid. According to the scheme, the ultrasonic transmitting sensors and the ultrasonic receiving sensors are arranged at different angles and fixed on the outer wall of the pipeline of the measured fluid, so that the flow velocity detection and calculation are completed by a relatively simple device structure, the system integration and miniaturization are further realized, the detection precision is high, and the measurement process is simple.

FIG. 2 is a method flow diagram illustrating a method of ultrasonic flow detection in accordance with an exemplary embodiment. The method is performed by a controller in an ultrasonic flow detection system, which may be the controller shown in fig. 1. The system comprises: the ultrasonic monitoring device comprises a pulse generator, an ultrasonic transmitting sensor, at least two ultrasonic receiving sensors, a fixed seat and a controller; the pulse generator is connected with the ultrasonic emission sensor; the fixing seat fixes the ultrasonic transmitting sensor and each ultrasonic receiving sensor on the outer wall of the pipeline of the measured fluid at different angles; the pulse generator is used for generating an electric signal of a target frequency, the ultrasonic transmitting sensor is used for generating an ultrasonic transmitting signal based on the electric signal of the target frequency and transmitting the ultrasonic transmitting signal to the measured fluid, and each ultrasonic receiving sensor is used for receiving an echo signal reflected by the measured fluid;

the method comprises the following steps:

s201, respectively calculating the frequency difference between each echo signal and the ultrasonic wave emission signal to respectively acquire the predicted speed vector of the fluid to be measured by each ultrasonic receiving sensor.

Further, when at least two ultrasound receiving sensors in the system include a first ultrasound receiving sensor and a second ultrasound receiving sensor, frequency differences between the first echo signal and the ultrasound emission signal and between the second echo signal and the ultrasound emission signal are respectively calculated to obtain a first predicted velocity vector of the measured fluid measured by the first ultrasound receiving sensor and a second predicted velocity vector of the measured fluid measured by the second ultrasound receiving sensor. The device comprises two ultrasonic receiving sensors, wherein the two ultrasonic receiving sensors are the first ultrasonic receiving sensor and the second ultrasonic receiving sensor respectively.

S202, calculating the actual velocity vector of the measured fluid according to each predicted velocity vector to obtain the actual flow speed and the actual flow direction of the measured fluid.

In a possible implementation manner, each echo signal is acquired, and for each echo signal, the echo signal is amplified;

performing IQ demodulation processing on the amplified echo signal to acquire a demodulation signal;

filtering the demodulation signal to obtain a filtered demodulation signal;

and calculating the echo frequency corresponding to the echo signal according to the filtered demodulation signal.

In one possible embodiment, the at least two ultrasound receiving sensors comprise a first ultrasound receiving sensor and a second ultrasound receiving sensor;

and acquiring an actual velocity vector of the measured fluid through the following formula:

v＝v2/(cosθ2)；

θ2＝tan-1((cosθ-v1/v2)/sinθ)；

wherein v represents the actual velocity vector of the measured fluid, v1 represents the first predicted velocity vector of the measured fluid measured by the first ultrasonic receiving sensor, v2 represents the second predicted velocity vector of the measured fluid measured by the second ultrasonic receiving sensor, and θ represents the angle formed by the first ultrasonic receiving sensor and the second ultrasonic receiving sensor on the coordinate system; θ 2 represents an angle formed by the second ultrasonic receiving transducer and the ultrasonic transmitting transducer on a coordinate system.

Furthermore, a plurality of ultrasonic receiving sensors arranged in a proper angle direction are adopted to receive echo signals, velocity vectors in a plurality of directions (namely predicted velocity vectors corresponding to the ultrasonic receiving sensors respectively) are calculated according to Doppler frequency shift, and finally accurate movement velocity of the fluid is obtained through vector analysis.

Further, when the system includes a first ultrasonic receiving sensor and a second ultrasonic receiving sensor, please refer to fig. 3 for illustrating the angular arrangement of the ultrasonic receiving sensor, the first ultrasonic receiving sensor and the second ultrasonic receiving sensor on the fixing frame. Firstly, respectively acquiring a first filtered demodulation signal corresponding to a first ultrasonic receiving sensor and a second filtered demodulation signal corresponding to a second ultrasonic receiving sensor by a controller, and respectively calculating a first echo frequency W2 corresponding to a first echo signal and a second echo frequency W3 corresponding to a second echo signal; according to a Doppler calculation method, calculating a first expected speed vector V1 of the first ultrasonic receiving sensor according to a frequency difference delta W21 between the first echo frequency W2 and the electric signal W1 of the target frequency; similarly, according to the doppler calculation method, a second predicted velocity vector V2 of the second ultrasonic receiving sensor is calculated from the frequency difference Δ W31 between the second echo frequency W3 and the electric signal W1 of the target frequency; namely, the method comprises the following steps:

v*cos(θ2)＝v2；

v*cos(θ1)＝v1；

the actual velocity vector of the measured fluid is obtained through comprehensive calculation and is as follows:

v = v 2/(cos θ 2), where θ 2= tan-1 ((cos θ -v1/v 2)/sin θ); the actual flow speed and the actual flow direction of the measured fluid can be obtained.

Wherein v represents an actual velocity vector of the measured fluid, v1 represents a first predicted velocity vector of the measured fluid measured by the first ultrasonic receiving sensor, v2 represents a second predicted velocity vector of the measured fluid measured by the second ultrasonic receiving sensor, and θ represents an angle formed by the first ultrasonic receiving sensor and the second ultrasonic receiving sensor on a coordinate system; θ 1 represents an angle formed by the first ultrasonic receiving sensor and the ultrasonic transmitting sensor on a coordinate system; θ 2 represents an angle formed by the second ultrasonic receiving sensor and the ultrasonic transmitting sensor on a coordinate system.

In summary, the method is performed by a controller in an ultrasonic flow detection system, the ultrasonic flow detection system comprising: the ultrasonic monitoring device comprises a pulse generator, an ultrasonic transmitting sensor, at least two ultrasonic receiving sensors, a fixed seat and a controller; the fixing seat fixes the ultrasonic transmitting sensor and each ultrasonic receiving sensor on the outer wall of the pipeline of the measured fluid at different angles; the pulse generator is used for generating an electric signal of a target frequency, the ultrasonic transmitting sensor is used for generating an ultrasonic transmitting signal based on the electric signal of the target frequency and transmitting the ultrasonic transmitting signal to the measured fluid, and each ultrasonic receiving sensor is used for receiving an echo signal reflected by the measured fluid; the controller respectively calculates the frequency difference between each echo signal and the ultrasonic wave emission signal so as to respectively acquire the predicted speed vector of the fluid to be detected measured, which is measured by each ultrasonic receiving sensor; and calculating the actual velocity vector of the measured fluid according to each predicted velocity vector so as to obtain the actual flow speed and the actual flow direction of the measured fluid. According to the scheme, the ultrasonic transmitting sensors and the ultrasonic receiving sensors are arranged at different angles and fixed on the outer wall of the pipeline of the measured fluid, so that the flow velocity detection and calculation can be completed by a relatively simple device structure, the system integration and miniaturization can be further realized, the detection precision is high, and the measurement process is simple.

Fig. 4 is a block diagram showing a structure of an ultrasonic flow detecting apparatus according to an exemplary embodiment, the apparatus including:

a predicted velocity vector acquiring module 401, configured to calculate frequency differences between the echo signals and the ultrasonic emission signals, respectively, so as to acquire predicted velocity vectors of the fluid to be measured, which are measured by the ultrasonic receiving sensors, respectively.

A flow velocity and direction obtaining module 402, configured to calculate an actual velocity vector of the measured fluid according to each of the predicted velocity vectors, so as to obtain an actual flow velocity and an actual direction of the measured fluid.

In one possible embodiment, the apparatus further comprises:

the amplification processing module is used for acquiring each echo signal and amplifying each echo signal;

a demodulation signal acquisition module, configured to perform IQ demodulation processing on the amplified echo signal to acquire a demodulation signal;

a demodulation signal obtaining module, configured to perform filtering processing on the demodulation signal to obtain a filtered demodulation signal;

and the echo frequency acquisition module is used for calculating the echo frequency corresponding to the echo signal according to the filtered demodulation signal.

In one possible embodiment, the at least two ultrasound receiving sensors comprise a first ultrasound receiving sensor and a second ultrasound receiving sensor;

the flow rate and direction obtaining module 402 is further configured to:

and acquiring an actual velocity vector of the measured fluid through the following formula:

v＝v2/(cosθ2)；

θ2＝tan-1((cosθ-v1/v2)/sinθ)；

wherein v represents the actual velocity vector of the measured fluid, v1 represents the first predicted velocity vector of the measured fluid measured by the first ultrasonic receiving sensor, v2 represents the second predicted velocity vector of the measured fluid measured by the second ultrasonic receiving sensor, and θ represents the angle formed by the first ultrasonic receiving sensor and the second ultrasonic receiving sensor on the coordinate system; θ 2 represents an angle formed by the second ultrasonic receiving transducer and the ultrasonic transmitting transducer on a coordinate system.

In summary, the controller calculates frequency differences between the echo signals and the ultrasonic emission signals respectively to obtain predicted velocity vectors of the fluid to be measured by the ultrasonic receiving sensors respectively; and calculating the actual velocity vector of the measured fluid according to each predicted velocity vector so as to obtain the actual flow speed and the actual flow direction of the measured fluid. Above-mentioned scheme will be through the prediction velocity vector of the fluid of being surveyed, obtain the actual velocity of flow and the actual flow direction of this fluid of being surveyed, realized accomplishing velocity of flow with simple device structure relatively and detect and calculate, further realize system integration and miniaturization, equipment is dressed and is made possible, detects the higher and measurement process of precision simple.

Referring to fig. 5, a block diagram of a computer device according to an exemplary embodiment of the present application is shown, the computer device includes a memory and a processor, the memory is used for storing a computer program, and the computer program is executed by the processor to implement an ultrasonic flow detection method as described above.

The processor may be a Central Processing Unit (CPU). The Processor may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or a combination thereof.

The memory, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules corresponding to the methods in the embodiments of the present application. The processor executes the non-transitory software programs, instructions and modules stored in the memory, so as to execute various functional applications and data processing of the processor, that is, to implement the method in the above method embodiment.

The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor, and the like. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the processor, and such remote memory may be coupled to the processor via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

In an exemplary embodiment, a computer-readable storage medium is also provided for storing at least one computer program, which is loaded and executed by a processor to implement all or part of the steps of the above method. For example, the computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a Compact Disc Read-Only Memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, and the like.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (7)

1. An ultrasonic flow detection system, the system comprising: the ultrasonic monitoring device comprises a pulse generator, an ultrasonic transmitting sensor, at least two ultrasonic receiving sensors, a fixed seat and a controller;

the pulse generator is connected with the ultrasonic emission sensor; the fixing seat fixes the ultrasonic transmitting sensor and each ultrasonic receiving sensor on the outer wall of the pipeline of the measured fluid at different angles respectively;

the pulse generator is used for generating an electric signal of a target frequency, the ultrasonic transmitting sensor is used for generating an ultrasonic transmitting signal based on the electric signal of the target frequency and transmitting the ultrasonic transmitting signal to the measured fluid, and each ultrasonic receiving sensor is used for receiving an echo signal reflected by the measured fluid;

the controller is configured to calculate a frequency difference between each echo signal and the ultrasonic emission signal, so as to obtain an actual flow velocity and an actual flow direction of the measured fluid.

2. The system of claim 1, wherein the holder is triangular, a first side of the holder forms a target angle with an outer wall of the pipe of the fluid under test, the ultrasonic emission sensor is disposed on a second side of the holder, and at least two ultrasonic emission sensors are disposed on a third side of the holder.

3. The system according to claim 1, wherein the fixing base is a pyramid, a bottom surface of the fixing base forms a target included angle with an outer wall of the pipeline of the measured fluid, the ultrasonic emission sensor is arranged on a target side edge of the fixing base, and at least one ultrasonic emission sensor is arranged on other side edges of the fixing base except the target side edge.

4. The system according to any one of claims 1-3, further comprising: at least two ultrasound front-end channels and at least two demodulators;

the ultrasonic front-end channels and the demodulators are equal in number to the ultrasonic receiving sensors and correspond to the ultrasonic receiving sensors one by one;

for each of the ultrasonic front-end channels, both ends of the ultrasonic front-end channel are respectively connected with the demodulator and the controller.

5. The system of claim 4, wherein the ultrasound front-end channel is configured to amplify the echo signals received by the ultrasound receiving sensor; the demodulator is used for carrying out IQ demodulation processing on the echo signals after the amplification processing so as to obtain demodulation signals corresponding to all the echo signals.

6. The system of claim 5, further comprising: at least two filters; the number of the filters is equal to that of the ultrasonic receiving sensors and corresponds to that of the ultrasonic receiving sensors one by one;

for each filter, both ends of the filter are respectively connected with the demodulator and the controller.

7. The system of claim 6, wherein the filter is configured to filter the demodulated signal to obtain the filtered demodulated signal.

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