CN113092580A - Method for measuring solution concentration based on ultrasonic wave and controller - Google Patents
Method for measuring solution concentration based on ultrasonic wave and controller Download PDFInfo
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Abstract
The embodiment of the application discloses a method and a controller for measuring solution concentration based on ultrasonic waves, and adverse effects on urea solution concentration measurement caused by substances such as bubbles are avoided. The application includes: the controller controls the ultrasonic transmitter to transmit an ultrasonic signal to an ultrasonic receiver in the urea solution to be detected; the controller receives feedback information of the ultrasonic receiver; the controller acquires a oscillogram of the ultrasonic signal according to the feedback information; and the controller judges whether the waveform attenuation amplitude of the waveform diagram is larger than a preset amplitude or not, if so, the controller confirms that bubbles exist in the urea solution to be measured, and does not measure the concentration of the urea solution to be measured in the state.
Description
Technical Field
The embodiment of the application relates to the technical field of ultrasonic measurement, in particular to a method and a controller for measuring solution concentration based on ultrasonic.
Background
With the continuous improvement of the emission standard of automobile exhaust, the upgrading of the automobile exhaust emission post-treatment system is very important. At present, the diesel vehicle tail gas aftertreatment in China adopts a Selective Catalytic Reduction (SCR) route, namely, the ammonia oxide in the tail gas is reduced by using a vehicle urea solution with the concentration of 32.5%. Because the SCR reaction has strong sensitivity to the concentration of the urea solution and concentration deviation is easy to cause generation of secondary pollutants, the accurate concentration of the urea solution is extremely important for the actual tail gas treatment process.
The existing urea solution concentration measuring method is only based on a general physical principle to measure concentration, however, when urea is quickly filled or when a urea storage tank body jolts and shakes, bubbles are generated in the urea solution, and when ultrasonic waves for measuring the concentration pass through a mixed liquid of the bubbles and the urea solution, the ultrasonic waves cause signal deviation due to the fact that the propagation speed of the ultrasonic waves in air (bubbles) is different from the propagation speed of the ultrasonic waves in the urea solution, and then concentration detection deviation exists, or the concentration value cannot be normally detected.
Disclosure of Invention
The embodiment of the application provides a method and a controller for measuring solution concentration based on ultrasonic waves, and adverse effects on urea solution concentration measurement caused by substances such as bubbles are avoided.
The embodiment of the application provides a method for measuring the concentration of a solution based on ultrasonic waves in a first aspect, which comprises the following steps:
the controller controls the ultrasonic transmitter to transmit an ultrasonic signal to an ultrasonic receiver in the urea solution to be detected;
the controller receives feedback information of the ultrasonic receiver;
the controller acquires a oscillogram of the ultrasonic signal according to the feedback information;
and the controller judges whether the waveform attenuation amplitude of the waveform diagram is larger than a preset amplitude or not, if so, the controller confirms that bubbles exist in the urea solution to be measured, and does not measure the concentration of the urea solution to be measured in the state.
Optionally, after the controller determines whether the waveform attenuation amplitude of the waveform diagram is greater than a preset amplitude, the method further includes:
and if not, the controller confirms that no bubbles exist in the urea solution to be detected.
Optionally, after the controller confirms that there are no bubbles in the urea solution to be detected, the method further includes:
the controller obtains the ultrasonic surveying distance of the urea solution to be measured, wherein the ultrasonic surveying distance is the distance from an ultrasonic transmitter to an ultrasonic receiver;
the controller acquires the sending time and the receiving time of the ultrasonic signal according to the feedback information;
the controller calculates survey time according to the sending time and the receiving time;
the controller calculates the propagation rate of the ultrasonic signal in the urea solution to be measured according to the ultrasonic surveying distance and the surveying time;
and the controller confirms the concentration of the urea solution to be detected according to the solution concentration corresponding to the propagation rate.
Optionally, the determining, by the controller, the concentration of the urea solution to be detected according to the solution concentration corresponding to the propagation rate includes:
the controller creates a concentration corresponding table in advance;
and the controller confirms the corresponding concentration of the urea solution to be detected through a table look-up method according to the propagation rate.
Optionally, the obtaining, by the controller, a waveform diagram of the ultrasonic signal according to the feedback information includes:
the controller captures a waveform diagram of at least one ultrasonic wave from feedback information of the ultrasonic receiver through an input capture function of a timer.
A second aspect of embodiments of the present application provides a controller, including:
the transmitting unit is used for controlling the ultrasonic transmitter to transmit an ultrasonic signal to the ultrasonic receiver in the urea solution to be detected;
a receiving unit for receiving feedback information of the ultrasonic receiver;
the first acquisition unit is used for acquiring a oscillogram of the ultrasonic signal according to the feedback information;
the judging unit is used for judging whether the waveform attenuation amplitude of the oscillogram is larger than a preset amplitude or not;
and the first confirming unit is used for confirming that bubbles exist in the urea solution to be measured after the judging unit judges that the waveform attenuation amplitude of the waveform diagram is larger than the preset amplitude, and does not carry out concentration measurement on the urea solution to be measured in the state.
Optionally, after the determining unit, the controller further includes:
and the second confirming unit is used for confirming that no bubble exists in the urea solution to be detected after the judging unit judges that the waveform attenuation amplitude of the waveform diagram is smaller than or equal to the preset amplitude.
Optionally, after the second confirming unit, the controller further includes:
the second acquisition unit is used for acquiring the ultrasonic surveying distance of the urea solution to be measured, wherein the ultrasonic surveying distance is the distance from an ultrasonic transmitter to an ultrasonic receiver;
a third obtaining unit, configured to obtain sending time and receiving time of the ultrasonic signal according to the feedback information;
a first calculation unit for calculating a survey time from the transmission time and the reception time;
the second calculation unit is used for calculating the propagation rate of the ultrasonic signal in the urea solution to be measured according to the ultrasonic surveying distance and the surveying time;
and the third confirming unit is used for confirming the concentration of the urea solution to be detected according to the solution concentration corresponding to the propagation rate.
Optionally, the third confirming unit includes:
the creating module is used for creating a concentration corresponding table;
and the confirming module is used for confirming the corresponding concentration of the urea solution to be detected through a table look-up method according to the propagation rate.
Optionally, the transmitting unit includes:
the calibration module is used for calibrating a transmitting position and a receiving position in the urea solution to be tested, wherein the transmitting position is provided with an ultrasonic transmitter, and the receiving position is provided with an ultrasonic receiver;
a transmitting module for controlling the ultrasonic transmitter to transmit an ultrasonic signal from the transmitting position to the ultrasonic receiver at the receiving position by the controller.
A third aspect of embodiments of the present application provides a controller, including:
the device comprises a processor, a memory, an input and output unit and a bus;
the processor is connected with the memory, the input and output unit and the bus;
the processor performs the following operations:
controlling an ultrasonic transmitter to transmit an ultrasonic signal to an ultrasonic receiver in the urea solution to be detected;
receiving feedback information of the ultrasonic receiver;
acquiring a oscillogram of the ultrasonic signal according to the feedback information;
and judging whether the waveform attenuation amplitude of the waveform diagram is larger than a preset amplitude, if so, confirming that bubbles exist in the urea solution to be measured by the controller, and not measuring the concentration of the urea solution to be measured in the state.
An embodiment of the present application provides a computer-readable storage medium, on which a program is stored, where the program, when executed on a computer, performs any one of the methods for measuring a solution concentration based on ultrasonic waves in the first aspect.
According to the technical scheme, the embodiment of the application has the following advantages:
in this application, through the design of increasing supplementary judgement before measuring urea solution concentration, ultrasonic wave signal is transmitted to the ultrasonic receiver in the urea solution that awaits measuring through controlling ultrasonic transmitter promptly, and the oscillogram of the ultrasonic wave signal that the ultrasonic receiver feedbacks is received, whether have the bubble in the urea solution that awaits measuring according to the decay range judgement of oscillogram, if there is the bubble in the urea solution that awaits measuring, then do not carry out concentration measurement to the urea solution that awaits measuring under this state, avoided because of the harmful effects of material such as bubble to urea solution concentration measurement production.
Drawings
FIG. 1 is a schematic flow chart illustrating an embodiment of a method for measuring a solution concentration based on ultrasonic waves according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart of another embodiment of the method for measuring the concentration of a solution based on ultrasonic waves according to the embodiment of the present application;
FIG. 3 is a flow chart illustrating an embodiment of a controller according to the present disclosure;
FIG. 4 is a schematic flow chart illustrating another embodiment of a controller according to the present disclosure;
fig. 5 is a flowchart illustrating another embodiment of a controller according to the present disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 scope of protection of the present application.
The embodiment of the application provides a method and a controller for measuring solution concentration based on ultrasonic waves, and adverse effects on urea solution concentration measurement caused by substances such as bubbles are avoided.
Referring to fig. 1, an embodiment of a method for measuring a solution concentration based on ultrasonic waves in the embodiment of the present application includes:
101. the controller controls the ultrasonic transmitter to transmit an ultrasonic signal to an ultrasonic receiver in the urea solution to be detected;
since the propagation velocities of the ultrasonic waves in the air and the urea solution are different and the attenuation amplitudes during the simultaneous propagation are different, the concentration can be determined from the feedback reception time of the ultrasonic waves, and the reliability of the measurement signal of the sensor can be determined from the attenuation amplitudes of the ultrasonic waves.
In the embodiment of the application, an ultrasonic wave signal is emitted to the fixed direction in the urea solution to be measured through an ultrasonic wave emitter, an ultrasonic wave receiver is arranged at the fixed position in the direction, and the ultrasonic wave receiver receives the ultrasonic wave signal and then transmits the ultrasonic wave signal to a controller of a sensor, so that the controller calculates the propagation rate and the attenuation amplitude of the ultrasonic wave signal according to feedback information fed back by the ultrasonic wave receiver and is used for calculating the concentration of the urea solution and the reliability of a measurement signal.
102. The controller receives feedback information of the ultrasonic receiver;
in the embodiment of the present application, the controller receives feedback information fed back by the ultrasonic receiver, where the feedback information includes information such as the transmission time and the reception time of the ultrasonic signal, and the moving distance of the ultrasonic signal.
103. The controller acquires a oscillogram of the ultrasonic signal according to the feedback information;
it should be noted that, in the embodiment of the present application, in the urea solution to be measured, a signal with a frequency is obtained through the ultrasonic transmitter and the ultrasonic receiver, the signal may be a sinusoidal signal, or a pulse signal, the frequency of the signal is monitored, tracked, and the like through the controller, and the waveform of the ultrasonic signal is captured and displayed through an image.
104. The controller judges whether the waveform attenuation amplitude of the oscillogram is larger than a preset amplitude or not, if so, the step 105 is executed;
the magnitude of the attenuation width of the ultrasonic signal is determined by the intensity (sound pressure and sound intensity) of the ultrasonic signal reflected from the fixed reflecting plate (ultrasonic receiver). The ultrasonic signal is transmitted and reflected in the uniform urea solution, the feedback time and the feedback intensity are basically fixed, but if bubbles are encountered in the transmission process, the ultrasonic signal is subjected to scattering attenuation due to scattered reflection generated by the ultrasonic signal at a gas-liquid interface, namely the intensity of the ultrasonic signal is correspondingly weakened, and finally the intensity of the ultrasonic wave reflected back to the controller is weakened compared with that of the normal urea solution.
In this embodiment, if the controller determines that the waveform attenuation amplitude of the waveform diagram is greater than the preset amplitude, it indicates that there is a bubble in the solution to be measured, and step 105 is executed.
105. And the controller confirms that bubbles exist in the urea solution to be measured, and does not measure the concentration of the urea solution to be measured in the state.
It should be noted that, in the embodiment of the present application, if the controller determines that the waveform attenuation amplitude of the waveform diagram is greater than the preset amplitude, it indicates that the intensity of the ultrasonic signal is obviously weakened, and the ultrasonic signal passes through a heterogeneous object such as air and bubbles and gas during propagation and measurement, in this case, the concentration signal obtained by the controller according to the ultrasonic signal is not reliable, and therefore, the concentration of the urea solution to be measured in this state is not measured.
In the embodiment of the application, through the design of increasing supplementary judgement before measuring urea solution concentration, ultrasonic wave signal is transmitted to the ultrasonic receiver in the urea solution that awaits measuring through controlling ultrasonic transmitter promptly, and the oscillogram of the ultrasonic wave signal that the ultrasonic receiver feedbacks is received, whether have the bubble in the urea solution that awaits measuring according to the decay range judgement of oscillogram, if there is the bubble in the urea solution that awaits measuring, then do not carry out concentration measurement to the urea solution that awaits measuring under this state, avoided because of the harmful effects of material such as bubble to urea solution concentration measurement production.
The method for measuring the concentration of a solution based on ultrasonic waves is described in general, and a detailed explanation of the method for measuring the concentration of a solution based on ultrasonic waves is provided below.
Referring to fig. 2, another embodiment of the method for measuring the concentration of a solution based on ultrasonic waves in the embodiment of the present application includes:
201. calibrating a transmitting position and a receiving position in a urea solution to be detected, wherein the transmitting position is provided with an ultrasonic transmitter, and the receiving position is provided with an ultrasonic receiver;
it should be noted that, in the embodiment of the present application, in order to obtain the survey distance and the transmission time and the reception time of the ultrasonic signal, the transmission direction, the transmission position, and the reception position of the ultrasonic signal need to be fixed, an appropriate transmission position and an appropriate reception position are calibrated in the urea solution to be measured, an ultrasonic transmitter is installed at the transmission position, and an ultrasonic receiver is installed at the reception position.
202. The controller controls the ultrasonic transmitter to transmit an ultrasonic signal from the transmitting position to the ultrasonic receiver at the receiving position;
it should be noted that, in this embodiment of the application, after the controller transmits the ultrasonic wave signal from the transmitting position, the transmitting time is recorded, and meanwhile, after the ultrasonic wave receiver receives the ultrasonic wave signal, the receiving time is also recorded.
203. The controller receives feedback information of the ultrasonic receiver;
204. the controller acquires a oscillogram of the ultrasonic signal according to the feedback information;
in the embodiment of the present application, steps 203 to 204 are similar to steps 102 to 103 described above, and are not described herein again.
205. The controller judges whether the waveform attenuation amplitude of the waveform diagram is larger than a preset amplitude, if so, the step 206 is executed; if not, go to step 207;
the magnitude of the attenuation width of the ultrasonic signal is determined by the intensity (sound pressure and sound intensity) of the ultrasonic signal reflected from the fixed reflecting plate (ultrasonic receiver). The ultrasonic signal is transmitted and reflected in the uniform urea solution, the feedback time and the feedback intensity are basically fixed, but if bubbles are encountered in the transmission process, the ultrasonic signal is subjected to scattering attenuation due to scattered reflection generated by the ultrasonic signal at a gas-liquid interface, namely the intensity of the ultrasonic signal is correspondingly weakened, and finally the intensity of the ultrasonic wave reflected back to the controller is weakened compared with that of the normal urea solution.
In the embodiment of the present application, if the waveform attenuation amplitude of the waveform diagram is greater than the preset amplitude, it indicates that there is a bubble in the solution to be tested, and step 206 is executed; if the waveform attenuation amplitude of the waveform diagram is smaller than or equal to the preset amplitude, it indicates that there is no bubble in the solution to be tested, and step 207 is executed.
It should be noted that, in the embodiment of the present application, a reliability grade table is created, in which the signal reliability can be graded and subdivided according to the different degrees of attenuation, so as to determine what degree of attenuation can be used to determine the concentration calculated by the urea solution to be measured in the state.
206. And the controller confirms that bubbles exist in the urea solution to be measured, and does not measure the concentration of the urea solution to be measured in the state.
In the embodiment of the present application, step 206 is similar to step 105, and is not described herein again.
207. The controller confirms that no bubble exists in the urea solution to be detected;
it should be noted that, in the embodiment of the present application, if the waveform attenuation amplitude of the waveform diagram is less than or equal to the preset amplitude, it indicates that there are no heterogeneous objects and gases such as air and bubbles in the urea solution to be measured, or only a small amount of heterogeneous objects and gases is not enough to affect the concentration measurement, in which case the concentration signal obtained by the controller according to the ultrasonic signal is reliable, and the specific concentration measurement method is shown in step 208.
208. The controller obtains the ultrasonic surveying distance of the urea solution to be measured, wherein the ultrasonic surveying distance is the distance from an ultrasonic transmitter to an ultrasonic receiver;
it should be noted that, in the embodiment of the present application, since the concentration to be measured is related to the wave speed of the ultrasonic wave, and it is known from the formula H ═ V × T/2(H is the ultrasonic survey distance, V is the ultrasonic wave speed, and T is the survey time), to calculate the ultrasonic wave speed, it is necessary to obtain the ultrasonic survey distance of the urea solution to be measured, where the ultrasonic survey distance is the distance from the ultrasonic transmitter to the ultrasonic receiver.
209. The controller acquires the sending time and the receiving time of the ultrasonic signal according to the feedback information;
it should be noted that, in the embodiment of the present application, since the concentration to be measured is related to the wave speed of the ultrasonic wave, and it is known from the formula H ═ V × T/2(H is the ultrasonic survey distance, V is the ultrasonic wave speed, and T is the survey time), in addition to the ultrasonic survey distance required to acquire the urea solution to be measured, the survey time required to acquire the ultrasonic signal is obtained by subtracting the transmission time from the reception time.
210. The controller calculates survey time according to the sending time and the receiving time;
it should be noted that in the embodiment of the present application, the survey time is obtained by subtracting the sending time from the receiving time, and the difference of the survey time T is the difference of the liquid concentration.
211. The controller calculates the propagation rate of the ultrasonic signal in the urea solution to be measured according to the ultrasonic surveying distance and the surveying time;
in the embodiment of the application, the wave velocity of the ultrasonic signal in the urea solution to be measured is calculated according to the formula H-V x T/2.
It should be noted that, when the concentration of the urea solution is increased, the propagation speed of the ultrasonic signal is correspondingly increased, and the survey time of the ultrasonic signal is also correspondingly reduced.
212. And the controller confirms the concentration of the urea solution to be detected according to the solution concentration corresponding to the propagation rate.
In the embodiment of the present application, the controller creates a concentration mapping table in advance, and the controller determines the corresponding concentration of the urea solution to be measured by a table lookup method according to the calculated propagation rate.
In the embodiment of the application, before the concentration of the urea solution to be measured is calculated, the design of judging whether heterogeneous substances such as bubbles exist in the quick-urination solution to be measured by adding assistance is adopted, so that the adverse effects of the substances such as the bubbles on the measurement result are avoided. After confirming that no heterogeneous substances such as bubbles exist, the embodiment of the application confirms the concentration based on the propagation rate difference of the ultrasonic signal in the urea solutions with different concentrations, specifically, the concentration is judged according to the attenuation amplitude of the ultrasonic signal, and the signal reliability can be graded and subdivided by a table look-up method according to the different degrees of attenuation, so that the concentration obtained by the urea solution in which state can be informed can be determined, and the measurement accuracy is improved.
The method of measuring the concentration of the solution based on the ultrasonic wave is described above, and the controller will be explained below.
Referring to fig. 3, an embodiment of a controller according to the present disclosure includes:
the transmitting unit 301 is used for controlling the ultrasonic transmitter to transmit an ultrasonic signal to an ultrasonic receiver in the urea solution to be detected;
a receiving unit 302, configured to receive feedback information of the ultrasonic receiver;
a first obtaining unit 303, configured to obtain a waveform map of the ultrasonic signal according to the feedback information;
a determining unit 304, configured to determine whether a waveform attenuation amplitude of the waveform diagram is greater than a preset amplitude;
a first confirming unit 305, configured to confirm that there is a bubble in the urea solution to be measured after the determining unit 304 determines that the waveform attenuation amplitude of the waveform diagram is greater than the preset amplitude, and not perform concentration measurement on the urea solution to be measured in this state.
In the embodiment of the application, through the design of adding supplementary judgement before measuring urea solution concentration, ultrasonic wave signal is transmitted to the ultrasonic receiver in the urea solution that awaits measuring through transmitting element 301 control ultrasonic transmitter promptly, and the oscillogram of the ultrasonic wave signal that feeds back through receiving element 302 receiving ultrasonic wave receiver, judge whether have the bubble in the urea solution that awaits measuring according to the decay range of oscillogram through judging element 304, if there is the bubble in the urea solution that awaits measuring, then do not carry out concentration measurement to the urea solution that awaits measuring under this state, avoided because of the harmful effects of substances such as bubble to urea solution concentration measurement production.
The functions of the units of the controller are described in general above, and a detailed description of the functions of the units of the controller is provided below.
Referring to fig. 4, in the embodiment of the present application, another embodiment of the controller includes:
the transmitting unit 401 is configured to control an ultrasonic transmitter to transmit an ultrasonic signal to an ultrasonic receiver in the urea solution to be detected;
optionally, the transmitting unit further may further include:
the calibration module 4011 is configured to calibrate a transmitting position and a receiving position in a urea solution to be tested, where the transmitting position is provided with an ultrasonic transmitter, and the receiving position is provided with an ultrasonic receiver;
a transmitting module 4012, configured to control the ultrasonic transmitter to transmit an ultrasonic signal from the transmitting position to the ultrasonic receiver at the receiving position by the controller.
A receiving unit 402, configured to receive feedback information of the ultrasonic receiver;
a first obtaining unit 403, configured to obtain a waveform map of the ultrasonic signal according to the feedback information;
a judging unit 404, configured to judge whether a waveform attenuation amplitude of the waveform diagram is greater than a preset amplitude;
the first confirming unit 405 is configured to confirm that bubbles exist in the urea solution to be measured after the judging unit 404 judges that the waveform attenuation amplitude of the waveform diagram is greater than the preset amplitude, and does not perform concentration measurement on the urea solution to be measured in this state.
And a second confirming unit 406, configured to confirm that no bubble is present in the urea solution to be detected after the determining unit 404 determines that the waveform attenuation amplitude of the waveform diagram is smaller than or equal to the preset amplitude.
A second obtaining unit 407, configured to obtain an ultrasonic survey distance of the urea solution to be measured, where the ultrasonic survey distance is a distance from an ultrasonic transmitter to an ultrasonic receiver;
a third obtaining unit 408, configured to obtain the sending time and the receiving time of the ultrasonic signal according to the feedback information;
a first calculating unit 409 for calculating a survey time from the transmission time and the reception time;
a second calculating unit 410, configured to calculate a propagation rate of the ultrasonic signal in the urea solution to be measured according to the ultrasonic survey distance and the survey time;
and a third confirming unit 411, configured to confirm the concentration of the urea solution to be detected according to the solution concentration corresponding to the propagation rate.
Optionally, the third confirming unit 411 may further include:
a creating module 4111, configured to create a concentration correspondence table;
a confirming module 4112, configured to confirm, according to the propagation rate, a corresponding concentration of the urea solution to be detected by using a table lookup method.
In the embodiment of the present application, the functions of each unit module correspond to the steps in the embodiments shown in fig. 1 to fig. 2, and are not described herein again.
Referring to fig. 5, another embodiment of the controller according to the embodiment of the present application includes:
a processor 501, a memory 502, an input-output unit 503, and a bus 504;
the processor 501 is connected with the memory 502, the input/output unit 503 and the bus 504;
the processor 501 performs the following operations:
controlling an ultrasonic transmitter to transmit an ultrasonic signal to an ultrasonic receiver in the urea solution to be detected;
receiving feedback information of the ultrasonic receiver;
acquiring a oscillogram of the ultrasonic signal according to the feedback information;
and judging whether the waveform attenuation amplitude of the waveform diagram is larger than a preset amplitude or not, if so, confirming that bubbles exist in the urea solution to be measured, and not measuring the concentration of the urea solution to be measured in the state.
In this embodiment, the functions of the processor 501 correspond to the steps in the embodiments shown in fig. 1 to fig. 2, and are not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like.
Claims (10)
1. A method for measuring solution concentration based on ultrasonic waves is characterized by comprising the following steps:
the controller controls the ultrasonic transmitter to transmit an ultrasonic signal to an ultrasonic receiver in the urea solution to be detected;
the controller receives feedback information of the ultrasonic receiver;
the controller acquires a oscillogram of the ultrasonic signal according to the feedback information;
and the controller judges whether the waveform attenuation amplitude of the waveform diagram is larger than a preset amplitude or not, if so, the controller confirms that bubbles exist in the urea solution to be measured, and does not measure the concentration of the urea solution to be measured in the state.
2. The method of claim 1, wherein after the controller determines whether the waveform decay magnitude of the waveform map is greater than a preset magnitude, the method further comprises:
and if not, the controller confirms that no bubbles exist in the urea solution to be detected.
3. The method of claim 2, wherein after the controller confirms that there are no air bubbles in the urea solution to be tested, the method further comprises:
the controller obtains the ultrasonic surveying distance of the urea solution to be measured, wherein the ultrasonic surveying distance is the distance from an ultrasonic transmitter to an ultrasonic receiver;
the controller acquires the sending time and the receiving time of the ultrasonic signal according to the feedback information;
the controller calculates survey time according to the sending time and the receiving time;
the controller calculates the propagation rate of the ultrasonic signal in the urea solution to be measured according to the ultrasonic surveying distance and the surveying time;
and the controller confirms the concentration of the urea solution to be detected according to the solution concentration corresponding to the propagation rate.
4. The method of claim 3, wherein the controller confirms the concentration of the urea solution to be tested according to the solution concentration corresponding to the propagation rate, and the method comprises the following steps:
the controller creates a concentration corresponding table in advance;
and the controller confirms the corresponding concentration of the urea solution to be detected through a table look-up method according to the propagation rate.
5. The method according to any one of claims 1 to 4, wherein the controller controls an ultrasonic transmitter to transmit an ultrasonic signal to an ultrasonic receiver in the urea solution to be tested, and comprises the following steps:
calibrating a transmitting position and a receiving position in a urea solution to be detected, wherein the transmitting position is provided with an ultrasonic transmitter, and the receiving position is provided with an ultrasonic receiver;
the controller controls the ultrasonic transmitter to transmit an ultrasonic signal from the transmitting position to the ultrasonic receiver at the receiving position.
6. A controller, comprising:
the transmitting unit is used for controlling the ultrasonic transmitter to transmit an ultrasonic signal to the ultrasonic receiver in the urea solution to be detected;
a receiving unit for receiving feedback information of the ultrasonic receiver;
the first acquisition unit is used for acquiring a oscillogram of the ultrasonic signal according to the feedback information;
the judging unit is used for judging whether the waveform attenuation amplitude of the oscillogram is larger than a preset amplitude or not;
and the first confirming unit is used for confirming that bubbles exist in the urea solution to be measured after the judging unit judges that the waveform attenuation amplitude of the waveform diagram is larger than the preset amplitude, and does not carry out concentration measurement on the urea solution to be measured in the state.
7. The controller according to claim 6, wherein after the judging unit, the controller further comprises:
and the second confirming unit is used for confirming that no bubble exists in the urea solution to be detected after the judging unit judges that the waveform attenuation amplitude of the waveform diagram is smaller than or equal to the preset amplitude.
8. The controller according to claim 7, wherein after the second confirmation unit, the controller further comprises:
the second acquisition unit is used for acquiring the ultrasonic surveying distance of the urea solution to be measured, wherein the ultrasonic surveying distance is the distance from an ultrasonic transmitter to an ultrasonic receiver;
a third obtaining unit, configured to obtain sending time and receiving time of the ultrasonic signal according to the feedback information;
a first calculation unit for calculating a survey time from the transmission time and the reception time;
the second calculation unit is used for calculating the propagation rate of the ultrasonic signal in the urea solution to be measured according to the ultrasonic surveying distance and the surveying time;
and the third confirming unit is used for confirming the concentration of the urea solution to be detected according to the solution concentration corresponding to the propagation rate.
9. The controller according to claim 8, wherein the third confirmation unit comprises:
the creating module is used for creating a concentration corresponding table;
and the confirming module is used for confirming the corresponding concentration of the urea solution to be detected through a table look-up method according to the propagation rate.
10. The controller according to any one of claims 6 to 9, wherein the transmitting unit comprises:
the calibration module is used for calibrating a transmitting position and a receiving position in the urea solution to be tested, wherein the transmitting position is provided with an ultrasonic transmitter, and the receiving position is provided with an ultrasonic receiver;
a transmitting module for controlling the ultrasonic transmitter to transmit an ultrasonic signal from the transmitting position to the ultrasonic receiver at the receiving position by the controller.
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