CN112197833A - Double-absolute-pressure type Internet of things liquid level measuring device, system and method - Google Patents
Double-absolute-pressure type Internet of things liquid level measuring device, system and method Download PDFInfo
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- CN112197833A CN112197833A CN202010906603.3A CN202010906603A CN112197833A CN 112197833 A CN112197833 A CN 112197833A CN 202010906603 A CN202010906603 A CN 202010906603A CN 112197833 A CN112197833 A CN 112197833A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
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Abstract
One embodiment of the invention discloses a double-absolute-pressure type Internet of things liquid level measuring device, system and method, wherein the method comprises the following steps: a first calculation module for obtaining a first sensor pressure value P11And combining said P11Sending the data to a second computing module; a second calculation module for obtaining a second sensor pressure value P21According to the pressure value P of the first sensor11And the second sensor pressure value P21Outputting a second pressure value P22And a first pressure value P12And calculating a first pressure value P12And a second pressure value P22Then calculating the actual liquid level height according to the pressure difference value; and the communication module is used for uploading the actual liquid level height to a server.
Description
Technical Field
The invention relates to the technical field of pressure liquid level testing, in particular to a double absolute pressure type Internet of things liquid level measuring device, system and method.
Background
Liquid pressure signal measurement is a very common measurement technical means, and a traditional pressure measurement device mainly has two modes of an absolute pressure mode and a differential pressure mode. The absolute pressure obtained by the absolute pressure type measurement mode is the sum of the pressure of the fluid to be measured and the atmospheric pressure of the surrounding environment, the atmospheric pressure is not a constant value, and the absolute pressure is easily influenced by various factors such as the atmospheric pressure in different regions and different time periods, and the measurement precision is low.
The existing differential pressure type measuring mode needs to put a measuring device into liquid to be measured, and the measuring device has high requirements on the environment. For example, more suspended matters exist in the liquid environment to be tested, the suspended matters, microorganisms and the like can be attached to the surface of the testing device, so that the testing device is blocked, the measuring precision and the sensitivity are greatly reduced, and the use of the testing device is influenced.
At present, in the monitoring link of liquid, the traditional absolute pressure and differential pressure type monitoring mode can not effectively monitor the liquid level, so that the liquid level can not be effectively alarmed, and the accurate prejudgment can not be carried out on the aspects of exceeding the standard of the underground water level, early warning of flood and the like.
Disclosure of Invention
In view of the above, a first embodiment of the present invention provides a double absolute pressure type internet of things liquid level measuring device, including:
a first calculation module for obtaining a first sensor pressure value P11And combining said P11Sending the data to a second computing module;
a second calculation module for obtaining a second sensor pressure value P21According to the pressure value P of the first sensor11And the second sensor pressure value P21Outputting a second pressure value P22And a first pressure value P12And calculating a first pressure value P12And a second pressure value P22Then calculating the actual liquid level height according to the pressure difference value;
and the communication module is used for uploading the actual liquid level height to a server.
In a specific embodiment, the first calculation module includes: the device comprises a first insulation pressure sensor and a signal acquisition module;
the first absolute pressure sensor is used for acquiring a digital signal of a pressure value of the first sensor;
the signal acquisition module is used for converting the digital signal of the first sensor pressure value into a first sensor pressure value P11And combining said P11Sending the data to a second computing module;
the second calculation module includes: the second absolute pressure sensor and the signal acquisition module;
the second absolute pressure sensor is used for acquiring a digital signal of a pressure value of the second sensor;
the signal acquisition module is used for converting the digital signal of the pressure value of the second sensor into a pressure value P of the second sensor21According to the pressure value P of the first sensor11And the second sensor pressure value P21Outputting a second pressure value P22And a first pressure value P12And calculating a first pressure value P12And a second pressure value P22And then calculating the actual liquid level height according to the pressure difference value, and uploading the actual liquid level height to a server.
In one embodiment, the first absolute pressure sensor is an atmospheric and liquid level pressure sum measurement sensor, and the second absolute pressure sensor is an atmospheric pressure measurement sensor.
In a specific embodiment, the signal acquisition module of the second calculation module includes: an access module and a processing module, wherein
The access module is used for receiving a digital signal of a second sensor pressure value from the second absolute pressure sensor and transmitting the digital signal to the processing module;
the processing module is used for converting the digital signal of the second sensor pressure value into a second sensor pressure value P21According to the pressure value P of the first sensor11And the second sensor pressure value P21Outputting a second pressure value P22And a first pressure value P12And calculating a first pressure value P12And a second pressure value P22And then calculating the actual liquid level height based on the pressure difference.
In a specific embodiment, the method further comprises the following steps:
and the power supply module is used for supplying power to the device.
In a particular embodiment, further comprising
The first calculation module is positioned on the bottom surface of the container where the liquid is located, and the second calculation module is positioned in the atmosphere which is not in contact with the liquid level.
A second embodiment of the invention provides a double absolute pressure type internet of things liquid level measuring system,
the apparatus according to any one of the above;
and the server is used for storing the actual liquid level height.
A third embodiment of the present invention provides a double absolute pressure type internet of things liquid level measurement method, including:
s10, acquiring a first sensor pressure value P11And a second sensor pressure value P21；
S13, according to the pressure value P of the second sensor21And an upper limit atmospheric pressure value PhighAnd a lower limit atmospheric pressure value PlowOutput a second pressure value P according to the magnitude relation22And according to P22And P11Output a first pressure value P according to the magnitude relation12；
S15, calculating a first pressure value P12And a second pressure value P22The pressure difference of (a);
s17, calculating the actual liquid level height by using the pressure difference;
and S19, uploading the actual liquid level height to a server for storage.
In a specific embodiment, the S13 includes:
if the second sensor pressure value P21Less than the upper limit atmospheric pressure value PhighAnd is greater than the lower limit atmospheric pressure value PlowThen the second pressure value is the second passPressure value P of sensor21；
If the second sensor pressure value P21Less than the lower limit atmospheric pressure PlowThen the second pressure value is the lower limit atmospheric pressure value Plow；
If the second sensor pressure value P21 is greater than the upper limit atmospheric pressure PhighThen the second pressure value is the upper limit atmospheric pressure value Phigh。
In a specific embodiment, the S13 further includes:
if the first sensor pressure value P11Greater than the second pressure value P22Then the first pressure value P12The output is a first sensor pressure value P11；
If the first sensor pressure value P11Less than the second pressure value P22Then the first pressure value P12The output is a second pressure value P22。
The invention has the following beneficial effects:
according to the double-absolute-pressure type Internet of things liquid level monitoring device, system and method provided by the invention, the current liquid level data of the liquid can be transmitted to the server end through the network, the liquid level overrun is effectively monitored, the purpose of acquiring the pressure liquid level of the liquid to be detected in real time is realized, and therefore, the liquid level early warning effect can be achieved; compared with the absolute pressure type, the double absolute pressure measurement mode is not influenced by fluctuation errors of atmospheric pressure, has the application advantage of corrosion resistance and clogging resistance compared with the differential pressure type, realizes the discrimination process of the liquid level value before output by analyzing the digital signal after signal conversion, judging the condition of the pressure value of the sensor and measuring and calculating and offsetting the atmospheric pressure in the double absolute pressure measurement mode, and further ensures the accuracy of the liquid level output value.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 illustrates a double absolute pressure Internet of things level measurement system according to one embodiment of the invention;
FIG. 2 shows a schematic diagram of a double absolute pressure Internet of things liquid level measurement device according to an embodiment of the invention;
FIG. 3 shows a schematic diagram of a signal acquisition module included in a second computing module, according to one embodiment of the invention;
FIG. 4 shows a flow chart of a double absolute pressure Internet of things level measurement method according to one embodiment of the invention;
FIG. 5 illustrates the calculation of a second pressure value P according to one embodiment of the present invention22And a first pressure value P12And (4) a flow chart.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Embodiment 1-double absolute pressure type Internet of things liquid level measuring system and device
As shown in fig. 1, a double-absolute pressure type internet of things liquid level measurement system includes a double-absolute pressure type internet of things liquid level measurement device 10 and a server 20.
Wherein, two absolute pressure formula thing networking liquid level measurement system 10 are used for measuring actual liquid level height.
In one embodiment, as shown in fig. 2, the double-absolute-pressure internet of things liquid level measurement system 10 includes: a first computing module 101, a second computing module 103, and a communication module 105.
The first computing module 101 includes a first absolute pressure sensor 1011 and a signal collecting module 1015.
The first absolute pressure sensor 1011 is used for acquiring a digital signal of a pressure value of the first sensor;
the signal collecting module 1015 is configured to convert the digital signal of the first sensor pressure value into a first sensor pressure value P11And combining said P11And sending the data to a second computing module.
In a more preferred embodiment, the first absolute pressure sensor 1011 is a sum of atmospheric and liquid level pressure measuring sensor, which is used only for higher accuracy, and those skilled in the art will understand that the first absolute pressure sensor 1011 can also be other sensors.
The second calculation module 103 includes: a second absolute pressure sensor 1031 and a signal acquisition module 1035;
the second absolute pressure sensor 1031 is configured to obtain a digital signal of a second sensor pressure value.
In a more preferred example, the second absolute pressure sensor 1031 is an atmospheric pressure measuring sensor, which is used only because of higher accuracy, and those skilled in the art can understand that the second absolute pressure sensor 1031 may also be other sensors.
The signal acquisition module 1035 is configured to convert the digital signal of the second sensor pressure value into a second sensor pressure value P21According to the pressure value P of the first sensor11And the second sensor pressure value P21Outputting a second pressure value P22And a first pressure value P12And calculating a first pressure value P12And a second pressure value P22And then calculating the actual liquid level height H according to the pressure difference value, and uploading the actual liquid level height H to a server.
In one embodiment, as shown in fig. 3, the signal acquisition module 1035 comprises: an access module 10351 and a processing module 10355, wherein
The access module 10351 is configured to receive a digital signal of the second sensor pressure value from the second absolute pressure sensor 1031, and transmit the digital signal to the processing module 10355;
the processing module 10355 is configured to convert the digital signal of the second sensor pressure value into a second sensor pressure value P21According to the pressure value P of the first sensor11And the second sensor pressure value P21Outputting a second pressure value P22And a first pressure value P12And calculating a first pressure value P12And a second pressure value P22And then calculating the actual liquid level height according to the pressure differenceDegree;
in a preferred example, the access module employs MAX3485 and the processing module employs STM 32. The second absolute pressure sensor 1031 is connected to the access module MAX3485, and the processing module STM32 is connected to the communication module.
The communication module 105 is used to upload the actual level height to the server 20.
The power supply module supplies power to the monitoring data centralized equipment 10, and normal operation of the equipment is guaranteed.
And a server 20 for storing the actual liquid level height H.
Embodiment 2-double absolute pressure type Internet of things liquid level measurement method
As shown in fig. 4, a double absolute pressure type internet of things liquid level measurement method includes:
s10, acquiring a first sensor pressure value P11And a second sensor pressure value P21；
S13, according to the pressure value P of the second sensor21And an upper limit atmospheric pressure value PhighAnd a lower limit atmospheric pressure value PlowOutput a second pressure value P according to the magnitude relation22And according to P22And P11Output a first pressure value P according to the magnitude relation12；
S15, calculating a first pressure value P12And a second pressure value P22The pressure difference of (a);
s17, calculating the actual liquid level height by using the pressure difference;
and S19, uploading the actual liquid level height to a server for storage.
As shown in fig. 5, the S13 includes:
if the second sensor pressure value P21Less than the upper limit atmospheric pressure value PhighAnd is greater than the lower limit atmospheric pressure value PlowAnd then the second pressure value is the second sensor pressure value P21；
If the second sensor pressure value P21Less than the lower limit atmospheric pressure PlowThen the second pressure value is the lower limit atmospheric pressure value Plow；
If the second sensor pressure value P21 is greater than the upper limit atmospheric pressure PhighThen the second pressure value is the upper limit atmospheric pressure value Phigh。
The S13 further includes:
if the first sensor pressure value P11Greater than the second pressure value P22Then the first pressure value P12The output is a first sensor pressure value P11；
If the first sensor pressure value P11Less than the second pressure value P22Then the first pressure value P12The output is a second pressure value P22。
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. The utility model provides a two absolute pressure formula thing networking liquid level measurement device which characterized in that includes:
a first calculation module for obtaining a first sensor pressure value P11And combining said P11Sending the data to a second computing module;
a second calculation module for obtaining a second sensor pressure value P21According to the pressure value P of the first sensor11And the second sensor pressure value P21Outputting a second pressure value P22And a first pressure value P12And calculating a first pressure value P12And a second pressure value P22Then calculating the actual liquid level height according to the pressure difference value;
and the communication module is used for uploading the actual liquid level height to a server.
2. The apparatus of claim 1, wherein the first computing module comprises: the device comprises a first insulation pressure sensor and a signal acquisition module;
the first absolute pressure sensor is used for acquiring a digital signal of a pressure value of the first sensor;
the signal acquisition module is used for converting the digital signal of the first sensor pressure value into a first sensor pressure value P11And combining said P11Sending the data to a second computing module;
the second calculation module includes: the second absolute pressure sensor and the signal acquisition module;
the second absolute pressure sensor is used for acquiring a digital signal of a pressure value of the second sensor;
the signal acquisition module is used for converting the digital signal of the pressure value of the second sensor into a pressure value P of the second sensor21According to the pressure value P of the first sensor11And said second sensor pressure value P21 outputting a second pressure value P22And a first pressure value P12And calculating a first pressure value P12And a second pressure value P22And then calculating the actual liquid level height according to the pressure difference value, and uploading the actual liquid level height to a server.
3. The apparatus of claim 2, wherein the first absolute pressure sensor is a sum of atmospheric and liquid level pressure measurement sensor and the second absolute pressure sensor is an atmospheric pressure measurement sensor.
4. The apparatus of claim 2, wherein the signal acquisition module of the second calculation module comprises: an access module and a processing module, wherein
The access module is used for receiving a digital signal of a second sensor pressure value from the second absolute pressure sensor and transmitting the digital signal to the processing module;
the processing module is used for converting the digital signal of the second sensor pressure value into a second sensor pressure value P21According to the pressure value P of the first sensor11And the second sensor pressure value P21Outputting a second pressure value P22And a first pressure value P12And calculate the firstA pressure value P12And a second pressure value P22And then calculating the actual liquid level height based on the pressure difference.
5. The apparatus of claim 4, further comprising:
and the power supply module is used for supplying power to the device.
6. The apparatus of any one of claims 1-5, further comprising
The first calculation module is positioned on the bottom surface of the container where the liquid is located, and the second calculation module is positioned in the atmosphere which is not in contact with the liquid level.
7. A double absolute pressure type Internet of things liquid level measuring system is characterized in that,
the apparatus of any one of claims 1-6;
and the server is used for storing the actual liquid level height.
8. A method for performing double-absolute-pressure internet of things liquid level measurement by using the system of claim 7, comprising the following steps:
s10, acquiring a first sensor pressure value P11And a second sensor pressure value P21；
S13, according to the pressure value P of the second sensor21And an upper limit atmospheric pressure value PhighAnd a lower limit atmospheric pressure value PlowOutput a second pressure value P according to the magnitude relation22And according to P22And P11Output a first pressure value P according to the magnitude relation12；
S15, calculating a first pressure value P12And a second pressure value P22The pressure difference of (a);
s17, calculating the actual liquid level height by using the pressure difference;
and S19, uploading the actual liquid level height to a server for storage.
9. The method according to claim 8, wherein the S13 includes:
if the second sensor pressure value P21Less than the upper limit atmospheric pressure value PhighAnd is greater than the lower limit atmospheric pressure value PlowAnd then the second pressure value is the second sensor pressure value P21；
If the second sensor pressure value P21Less than the lower limit atmospheric pressure PlowThen the second pressure value is the lower limit atmospheric pressure value Plow；
If the second sensor pressure value P21 is greater than the upper limit atmospheric pressure PhighThen the second pressure value is the upper limit atmospheric pressure value Phigh。
10. The method according to claim 8, wherein the S13 further comprises:
if the first sensor pressure value P11Greater than the second pressure value P22Then the first pressure value P12The output is a first sensor pressure value P11；
If the first sensor pressure value P11Less than the second pressure value P22Then the first pressure value P12The output is a second pressure value P22。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113029072A (en) * | 2021-02-25 | 2021-06-25 | 新奥科技发展有限公司 | Fluidized bed gasifier bed of material detection device and fluidized bed gasifier |
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| CN1621784A (en) * | 2004-12-31 | 2005-06-01 | 北京塞尔瑟斯仪表科技有限公司 | Two-wire system multiple sensors liquid level transmitting instrument |
| CN206311166U (en) * | 2016-08-03 | 2017-07-07 | 山西恒瑞金墒科技有限公司 | Absolute pressure formula liquid level gauge |
| JP2018169299A (en) * | 2017-03-30 | 2018-11-01 | 富士通株式会社 | Liquid level measuring system, liquid level measurement method, and liquid level measurement program |
| CN110608785A (en) * | 2019-08-22 | 2019-12-24 | 安徽省法米特物联技术有限公司 | Internet of things pressure liquid level meter and liquid level measurement method |
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- 2020-09-02 CN CN202010906603.3A patent/CN112197833A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137825A (en) * | 1997-07-18 | 1999-02-12 | Kawatetsu Advantec Kk | Throwing type water level gauge |
| CN1621784A (en) * | 2004-12-31 | 2005-06-01 | 北京塞尔瑟斯仪表科技有限公司 | Two-wire system multiple sensors liquid level transmitting instrument |
| CN206311166U (en) * | 2016-08-03 | 2017-07-07 | 山西恒瑞金墒科技有限公司 | Absolute pressure formula liquid level gauge |
| JP2018169299A (en) * | 2017-03-30 | 2018-11-01 | 富士通株式会社 | Liquid level measuring system, liquid level measurement method, and liquid level measurement program |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113029072A (en) * | 2021-02-25 | 2021-06-25 | 新奥科技发展有限公司 | Fluidized bed gasifier bed of material detection device and fluidized bed gasifier |
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Application publication date: 20210108 |