CN215811134U - Liquid level detection system - Google Patents
Liquid level detection system Download PDFInfo
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- CN215811134U CN215811134U CN202122127619.7U CN202122127619U CN215811134U CN 215811134 U CN215811134 U CN 215811134U CN 202122127619 U CN202122127619 U CN 202122127619U CN 215811134 U CN215811134 U CN 215811134U
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Abstract
The utility model provides a liquid level detection system, which comprises a controller, wherein the controller comprises an I/O interface, a data filtering module, a calibration module and an AD conversion module; a resistor connected to the I/O interface; the first probe is connected with the resistor and the AD conversion module; a second probe disposed opposite the first probe; the first probe and the second probe are both arranged in a container with a water level to be measured, and the second probe is grounded; the controller is used for outputting a preset detection waveform through the I/O interface and detecting a sampling value obtained by the AD conversion module; the data filtering module is used for filtering the sampling value; the calibration module is used for calculating the current water level of the container through the set calibration coefficient. Through the mode, the liquid level detection accuracy is guaranteed, meanwhile, the system structure is simplified, and the cost is reduced.
Description
Technical Field
The utility model relates to the technical field of water level detection, in particular to a liquid level detection system.
Background
In daily production and life, water level detection is often required, so various types of water level detection devices are emerging, for example, a patent with application number 201110066368.4 discloses a water level detection circuit, a device and a method thereof; however, at least two probes and a plurality of capacitance elements are needed, and the circuit uses more components, so that the cost of the circuit is higher, and the reliability of the circuit is reduced due to the increase of the used components. It is therefore desirable to provide a solution that facilitates accurate water level measurement while reducing equipment costs.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a liquid level detection system, which is used for realizing the technical effect of reducing the equipment cost while accurately measuring the water level.
In a first aspect, the present invention provides a liquid level detecting system, which includes a controller, wherein the controller includes an I/O interface, a data filtering module, a calibration module, and an AD conversion module; a resistor connected to the I/O interface; a first probe connected to the resistor and the AD conversion module; a second probe disposed opposite the first probe; the first probe and the second probe are both arranged in a container with a water level to be measured, and the second probe is grounded; the controller is used for outputting a preset detection wave mode through the I/O interface and detecting a sampling value acquired by the AD conversion module; the data filtering module is used for filtering the sampling value; the calibration module is used for calculating the current water level of the container through a set calibration coefficient.
Further, the controller further comprises a data compensation module; and after the calibration module calculates the current water level of the container according to the set calibration coefficient, the data compensation module performs data compensation processing on the current water level to obtain a corrected water level.
Further, the liquid level detection system also comprises a water pump connected with the controller; and a water pipe connected between the water pump and the container; the controller is also used for performing on-off control on the water pump through the corrected water level so as to control the water level in the container.
Further, the liquid level detection system also comprises an ultraviolet disinfection lamp connected with the controller; the ultraviolet sterilizing lamp is used for sterilizing and disinfecting the inside of the container.
Further, the liquid level detection system also comprises a display connected with the controller, and the display is used for displaying the water level in the container and the running state information of the water pump.
Further, the liquid level detection system also comprises a wireless communication module connected with the controller.
Further, the liquid level detection system further comprises a remote monitoring terminal in communication connection with the wireless communication module.
The beneficial effects that the utility model can realize are as follows: the liquid level detection system provided by the utility model acquires data through an RC (resistor-capacitor) series circuit consisting of the set resistor, the first probe and the second probe and an AD (analog-to-digital) conversion module of the controller to obtain a corresponding sampling value; and then, after the acquired sampling value is filtered by the data filtering module, calculating the current water level of the container by the calibration coefficient of the calibration module. Fewer components are used in the process, detection of the water level can be achieved by combining with each calculation module in the controller, the accuracy of liquid level detection is guaranteed, the system structure is simplified, and the cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of a topology structure of a liquid level detection system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a liquid level detection method according to an embodiment of the present invention.
Icon: 10-a liquid level detection system; 100-a controller; 110-AD conversion module; 120-a data filtering module; 130-a calibration module; 140-a data compensation module; 200-a first probe; 300-a second probe; 400-a water pump; 500-ultraviolet disinfection lamp; 600-a display; 700-a wireless communication module; 800-remote monitoring terminal.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a schematic view of a topology structure of a liquid level detection system according to an embodiment of the utility model.
In one embodiment, an embodiment of the present invention provides a liquid level detection system 10, where the liquid level detection system 10 includes a controller 100, and the controller 100 includes an I/O interface, a data filtering module 120, a calibration module 130, and an AD conversion module 110; a resistor R connected with the I/O interface; a first probe 200 connected to the resistor R and the AD conversion module 110; a second probe 300 disposed opposite to the first probe 200; the first probe 200 and the second probe 300 are both disposed in a container to be measured for water level, and the second probe 300 is grounded; the controller 100 is configured to output a preset detection waveform through the I/O interface and detect a sampling value obtained by the AD conversion module 110; the data filtering module 120 is configured to perform filtering processing on the sampling values; the calibration module 130 is used for calculating the current water level of the container according to the set calibration coefficient. Illustratively, the controller 100 may be implemented as a single chip microcomputer (e.g., an STM32 single chip microcomputer); the first probe 200 and the second probe 300 may be U-shaped probes.
In the implementation process, the controller 100 may input a preset detection waveform to the first probe 200 through the I/O interface, detect a sampling value of the first probe 200 acquired by the AD conversion module 110, perform filtering processing on the sampling value through the data filtering module 120, and calculate the current water level of the container through the calibration coefficient in the calibration module 130.
In one embodiment, the controller 100 further includes a data compensation module 140; after the calibration module 130 calculates the current water level of the container according to the set calibration coefficient, the data compensation module 140 performs data compensation processing on the current water level to obtain a corrected water level. The accuracy of water level detection can be further improved by the data compensation module 140. For example, the data compensation module 140 may correct the current water level using various kinds of jitter compensation algorithms that are widely used at present.
In one embodiment, the fluid level detection system 10 further includes a water pump 400 connected to the controller 100; and a water pipe connected between the water pump 400 and the container; the controller 100 is also used to control the water level in the container by on-off controlling the water pump 400 through the correction of the water level.
In the implementation process, the water pump 400 can meet the requirements of some scenes needing water supplement in the container, and meanwhile, the water level can be detected in real time.
In one embodiment, the fluid level detection system 10 further includes an ultraviolet germicidal lamp 500 connected to the controller 100; the ultraviolet germicidal lamp 500 is used to sterilize the inside of the container.
In the above implementation process, the liquid level detection system 10 is further provided with the ultraviolet disinfection lamp 500, and the inside of the container can be disinfected and sterilized through the ultraviolet disinfection lamp 500, so that the water in the container is cleaner.
In one embodiment, the fluid level detection system 10 further includes a display 600 coupled to the controller 100, the display 600 being configured to display information about the level of water in the container and the operating status of the water pump 400.
In the implementation process, in order to facilitate a user to view the water level in the container in real time, the controller 100 may further be connected to a display 600, the water level in the container may be displayed in real time through the display 600, and meanwhile, the controller 100 may further obtain the operation state information of the water pump 400 and display the operation state information on the display 600.
In one embodiment, the fluid level detection system 10 further includes a wireless communication module 700 coupled to the controller 100. Illustratively, the wireless communication module 700 may be a WiFi module, a bluetooth module, a 4G communication module, a 5G communication module, or the like.
With the above-described embodiments, the controller 100 can transmit the operation data of the system to a remote device through the wireless communication module 700, so as to facilitate remote monitoring of the liquid level detection system 10.
Illustratively, the fluid level detection system 10 further includes a remote monitoring terminal 800 communicatively coupled to the wireless communication module 700. A plurality of liquid level detection systems 10 can be monitored through the arranged remote monitoring terminal 800, and the use is more convenient.
Specifically, the remote monitoring terminal 800 may be a computer terminal or a mobile terminal (e.g., a mobile phone of a user, a tablet computer, etc.), and the user may select the remote monitoring terminal according to actual use requirements.
Referring to fig. 2, fig. 2 is a schematic flow chart of a liquid level detection method according to an embodiment of the utility model.
In an implementation manner, an embodiment of the present invention further provides a liquid level detection method for the liquid level detection system, which is specifically described as follows.
S1, acquiring a preset detection wave pattern.
Specifically, the user can manually set the detection waveform to be used, and simultaneously set the corresponding frequency, and the controller generates the corresponding waveform by acquiring the information configured by the user.
And S2, generating a corresponding detection signal according to the detection wave pattern, transmitting the detection signal to the first probe and acquiring feedback data of the first probe.
And S3, performing AD conversion on the feedback data to obtain a corresponding sampling value.
Specifically, the controller can acquire feedback data through the AD conversion module, acquire effective values in each period, acquire a certain number of original values in one acquisition period, and perform data filtering processing on the original values to obtain a filtering value of which the effective acquisition AD value is the original value. Each command will trigger the collection of a certain number of valid AD values.
And S4, filtering the sampling value, and calculating to obtain the current water level of the container through a set calibration coefficient.
After the sampling value is obtained, filtering processing can be carried out on the sampling value, and then the current water level of the container is obtained through calculation of a set calibration coefficient.
Specifically, in the filtering process, the sampling frequency is set to be T, the original value is x, and the effective value is y. N sets of analog quantities are acquired in one cycle (where Fn is required to be T), where 'F' denotes the frequency of the detected wave pattern, and the number of cycles is m, i.e., m sets of observation data (x)iraw,xierr) Raw is an original value in a period, err is a deviation value in the period, and a calculation equation of a sampling effective value is as follows:
and solving to obtain a sampling effective value y, wherein the effective value is a sampling value after secondary filtering, and calibrating the effective value to obtain the current water level.
In one embodiment, the method further comprises: and S5, carrying out data anti-shake compensation processing through the current water level to obtain a corrected water level.
Specifically, various jitter compensation algorithms widely used at present can be used to correct the current water level during the anti-jitter compensation processing. The compensation algorithm specifically selected can be selected according to actual requirements.
In one embodiment, the method further comprises: and (3) analysis process of calibration coefficients: acquiring sampling values and real values of water levels in a plurality of groups of containers; performing curve fitting according to the sampling value and the real value, and analyzing whether the goodness of fit meets the preset requirement or not; and if the goodness of fit meets the preset requirement, recording the calibration coefficient after fitting.
Specifically, whether the goodness-of-fit meets the preset requirements can be analyzed according to the following formula:
in the above formula, R2Expressing the goodness of fit; m represents the number of cycles collected; siRepresenting the ith sample value; r isiRepresenting the real value corresponding to the ith sampling value;
representing the mean of all sample values;
representing the mean of all real values.
In summary, the embodiment of the present invention provides a liquid level detecting system, which includes a controller, where the controller includes an I/O interface, a data filtering module, a calibration module, and an AD conversion module; a resistor connected to the I/O interface; the first probe is connected with the resistor and the AD conversion module; a second probe disposed opposite the first probe; the first probe and the second probe are both arranged in a container with a water level to be measured, and the second probe is grounded; the controller is used for outputting a preset detection waveform through the I/O interface and detecting a sampling value obtained by the AD conversion module; the data filtering module is used for filtering the sampling value; the calibration module is used for calculating the current water level of the container through the set calibration coefficient. Through the mode, the liquid level detection accuracy is guaranteed, meanwhile, the system structure is simplified, and the cost is reduced.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The liquid level detection system is characterized by comprising a controller, wherein the controller comprises an I/O interface, a data filtering module, a calibration module and an AD conversion module; a resistor connected to the I/O interface; a first probe connected to the resistor and the AD conversion module; a second probe disposed opposite the first probe; the first probe and the second probe are both arranged in a container with a water level to be measured, and the second probe is grounded; the controller is used for outputting a preset detection wave mode through the I/O interface and detecting a sampling value acquired by the AD conversion module; the data filtering module is used for filtering the sampling value; the calibration module is used for calculating the current water level of the container through a set calibration coefficient.
2. The fluid level detection system of claim 1, wherein the controller further comprises a data compensation module; and after the calibration module calculates the current water level of the container according to the set calibration coefficient, the data compensation module performs data compensation processing on the current water level to obtain a corrected water level.
3. The fluid level detection system of claim 2, further comprising a water pump connected to the controller; and a water pipe connected between the water pump and the container; the controller is also used for performing on-off control on the water pump through the corrected water level so as to control the water level in the container.
4. The fluid level detection system of claim 1, further comprising an ultraviolet disinfection lamp connected to the controller; the ultraviolet sterilizing lamp is used for sterilizing and disinfecting the inside of the container.
5. The fluid level detection system of claim 3, further comprising a display coupled to the controller, the display configured to display information regarding the level of water in the container and the operating status of the water pump.
6. The fluid level detection system of claim 1, further comprising a wireless communication module connected to the controller.
7. The fluid level detection system of claim 6, further comprising a remote monitoring terminal communicatively coupled to the wireless communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122127619.7U CN215811134U (en) | 2021-09-03 | 2021-09-03 | Liquid level detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122127619.7U CN215811134U (en) | 2021-09-03 | 2021-09-03 | Liquid level detection system |
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| Publication Number | Publication Date |
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| CN215811134U true CN215811134U (en) | 2022-02-11 |
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| CN202122127619.7U Active CN215811134U (en) | 2021-09-03 | 2021-09-03 | Liquid level detection system |
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- 2021-09-03 CN CN202122127619.7U patent/CN215811134U/en active Active
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