CN212378849U - Liquid level detection device, liquid storage device and unmanned equipment - Google Patents
Liquid level detection device, liquid storage device and unmanned equipment Download PDFInfo
- Publication number
- CN212378849U CN212378849U CN202021361450.0U CN202021361450U CN212378849U CN 212378849 U CN212378849 U CN 212378849U CN 202021361450 U CN202021361450 U CN 202021361450U CN 212378849 U CN212378849 U CN 212378849U
- Authority
- CN
- China
- Prior art keywords
- liquid level
- float
- liquid
- level detection
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Level Indicators Using A Float (AREA)
Abstract
The utility model discloses a liquid level detection device, liquid storage device and unmanned equipment relates to measuring device technical field, and liquid level detection device includes float unit and pressure detection unit, and the float unit includes the float, and the float can go up and down to move between primary importance and the second position that is higher than primary importance, and the pressure detection unit is used for detecting the first pressure value that corresponds when the float is located primary importance and the second pressure value that corresponds when the float is located the second position at least. The pressure detection unit may comprise a pressure sensor arranged on a horizontal plane on which the first position is located. The liquid level detection apparatus may further include a position recognition unit for recognizing a height position of the float. The float unit further includes a lifting guide portion between the first position and the second position, along which the float can perform lifting movement. The utility model discloses a liquid level detection device, liquid storage device and unmanned aerial vehicle equipment simple structure, commonality are good and measurement accuracy is high.
Description
Technical Field
The utility model relates to a measuring device technical field specifically, relates to a liquid level detection device, liquid storage device and unmanned equipment.
Background
At present, with the coming of the intelligent times of agriculture, the pesticide dosage needs to be accurately sprayed, so that the minimum cost is required to obtain the maximum benefit, and meanwhile, the resources can be better saved, and the environment is protected. Therefore, need improve unmanned car/unmanned aerial vehicle, set up an accurate level measurement device and detect the liquid level of pesticide on unmanned car/unmanned aerial vehicle.
Disclosure of Invention
The utility model aims at providing a novel liquid level detection device, liquid storage device and unmanned equipment, this liquid level detection device simple structure, commonality are good and measurement accuracy is high.
In order to achieve the above object, the utility model provides a liquid level detection device, liquid level detection device includes:
a float unit including a float that is movable up and down between a first position and a second position higher than the first position; and
and the pressure detection unit is at least used for detecting a first pressure value corresponding to the float positioned at the first position and a second pressure value corresponding to the float positioned at the second position.
Optionally, the float unit further comprises a lifting guide located between the first position and the second position, along which the float can move up and down.
Optionally, the float is annular, the lifting guide part is a lifting guide rail column which is vertically arranged, and the float is sleeved on the lifting guide rail column and can lift and move along the axial direction of the lifting guide rail column; and/or the presence of a gas in the gas,
the liquid level detection device further comprises a device body portion internally provided with a control unit accommodating cavity, the control unit accommodating cavity is used for accommodating the control unit of the liquid level detection device, and the lifting guide portion and the pressure detection unit are respectively arranged on the top wall of the device body portion.
Optionally, the liquid level detection device may further include a position identification unit for identifying a height position of the float, the position identification unit may include a first position magnetic field sensor provided at the first position and a second position magnetic field sensor provided at the second position, and the float includes a magnetic member that is induced by the first position magnetic field sensor and the second position magnetic field sensor.
Alternatively, the pressure detection unit may comprise a pressure sensor provided on a horizontal plane on which the first position is located.
Optionally, the liquid level detection device may further include:
a control unit configured to calculate a density ρ of the measured liquid, the density ρ satisfying:
wherein, F0Is the first pressure value, F1Is the second pressure value, H0G is a gravitational acceleration, and S is an area of a detection force receiving portion of the pressure detection unit.
Optionally, the liquid level detection device may further include:
a control unit configured to calculate a real-time level H of the measured liquid, the real-time level H satisfying:
wherein, F0Is the first pressure value, F1Is the second pressure value, H0Is the difference in height between the first position and the second position, F2And the pressure value detected by the pressure detection unit and corresponding to the real-time liquid level H.
Correspondingly, the utility model also provides a liquid storage device, liquid storage device includes that liquid holds chamber and foretell liquid level detection device, liquid level detection device set up in the bottom that liquid held the chamber, pressure detecting element's detection atress portion with the zero liquid level position that liquid held the chamber is located same horizontal plane.
Optionally, the control unit of the liquid level detection device may be further configured to obtain a real-time volume of the liquid to be detected according to the shape of the liquid cavity and the real-time liquid level calculated by the liquid level detection device.
Furthermore, the utility model also provides an unmanned equipment, unmanned equipment includes foretell liquid storage device.
The liquid level detection device of the utility model has simple structure, adopts the liquid level detection mode of combining static pressure type with the floating ball type, and comprises a float unit and a pressure detection unit, wherein the float of the float unit can move up and down between a first position and a second position higher than the first position, the height difference between the first position and the second position is a set value, the pressure detection unit can detect a first pressure value corresponding to the float positioned at the first position and a second pressure value corresponding to the float positioned at the second position, the first position is a position where the liquid level is zero, the detection stress part of the pressure detection unit is arranged on the horizontal plane where the first position is positioned, thus, the liquid density of the detected liquid can be calculated through the height difference between the first position and the second position, the first pressure value and the second pressure value, the area of the detection stress part of the pressure detection unit and the gravitational acceleration, when different liquids are detected, self-calibration can be conveniently carried out, and then the liquid density of the self-calibration can be utilized to calculate the corresponding liquid level and/or liquid volume and the like, so that the universality is good, and the repeatability precision and the measurement precision are high; and the compatibility is good, and the liquid level detection of different depths can be compatible.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 illustrates a liquid level detection apparatus according to an embodiment of the present invention;
fig. 2 shows a liquid storage device according to an embodiment of the present invention.
Description of the reference numerals
100 liquid level detection device
1 float unit 11 float
12 lifting guide 13 stop
2 pressure detection unit 3 device body section
200 liquid storage device
4 liquid containing cavity
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present invention. The liquid level detection apparatus 100, the liquid storage apparatus 200, and the unmanned aerial device according to the present invention are described below with reference to the accompanying drawings.
The common methods of the liquid level detection at present include a laser measurement method, an ultrasonic measurement method, a static pressure type measurement method, a floating ball type measurement method and the like. The laser measurement method is based on the optical detection principle, and reflects the light on the surface of the object to the receiver for detection, but the method is not suitable for transparent liquid, fluctuating liquid, vibration environment and the like. The ultrasonic measurement method calculates the liquid level height by detecting the time difference between the transmission and reflection of ultrasonic waves, but is not suitable for environments containing dust, foam and the like. Static pressure measurement, also called differential pressure measurement, is a measurement in which the liquid level is calculated by detecting the liquid pressure at the bottom by means of a pressure sensor installed at the bottom and then converting the liquid pressure to a known level, the reference value of the liquid pressure at the bottom being atmospheric pressure or a known atmospheric pressure communicated to the top, and the liquid pressure needs to be recalibrated by using an auxiliary device each time a different liquid is replaced. The floating ball type measuring method is the simplest and oldest detection mode, the price is relatively low, the change of the liquid level is mainly detected by the up-down lifting of a floating ball, and as the floating ball type measuring method is mechanical detection, the detection precision is easily influenced by buoyancy, the repetition precision is poor, and different liquids need to be re-calibrated; and compatibility is relatively poor, and the detection hardware that need use to the liquid level of different degree of depth can be distinguished, and the liquid depth is darker, and the liquid level detects the sensor that needs to use just more and the structure is just longer.
Because the liquid level measurement methods commonly used all have corresponding application restriction, in view of this, the inventor of the utility model continuously thinks about and innovates, provides an improved static pressure type liquid level detection device. The utility model discloses a liquid level detection device 100 simple structure, the liquid level measurement method that static pressure formula and floater formula combined together has been adopted, see fig. 1 and fig. 2, this liquid level detection device 100 includes float unit 1 and pressure detection unit 2, float unit 1 includes float 11, float 11 can go up and down to move between primary importance and the second place that is higher than primary importance, the difference in height between primary importance and the second place is the setting value, the primary importance is the position that the liquid level is zero, pressure detection unit's detection atress portion sets up on the horizontal plane at primary importance place, pressure detection unit 2 is used for detecting at least that first pressure value that corresponds when float 11 is located primary importance and the second pressure value that corresponds when float 11 is located the second place, so, the difference in height between accessible primary importance and the second place, first pressure value and second pressure value, the area and the acceleration of the detection atress portion of pressure detection unit 2 can calculate the liquid of being surveyed liquid by the liquid with gravity acceleration Density, when different liquids are detected, self calibration can be conveniently carried out, and then the liquid density of the self calibration can be used for calculating the corresponding liquid level and/or liquid volume and the like, so that the universality is good, and the repeatability precision and the measurement precision are high; and the compatibility is good, and the liquid level detection of different depths can be compatible.
Correspondingly, the utility model also provides a liquid storage device 200, this liquid storage device 200 include that liquid holds chamber 4 and foretell liquid level detection device 100, and liquid level detection device 100 sets up in the bottom that liquid held chamber 4, and pressure detecting element 2's detection atress portion and liquid hold the zero liquid level position in chamber 4 and be located same horizontal plane.
Furthermore, the utility model also provides an unmanned equipment, unmanned equipment includes foretell liquid storage device 200.
Among them, the structure of the float unit 1 may be various, for example, in addition to the float 11, a lifting guide 12 having a guiding function for the lifting movement of the float 11, etc. may be included, and further, the structural forms of the float 11 and the lifting guide 12 may be various, for example, the float 11 may be in a ring shape, a square shape, a spherical shape, an irregular shape, etc.; the lifting guide part 12 can be a solid cylinder, a hollow cavity or other irregular shapes; in addition, due to the difference of the structural forms of the float 11 and the lifting guide 12, the structural relationship between the float 11 and the lifting guide 12 is correspondingly diversified, and the present invention is not limited thereto. It should be noted that, the utility model discloses a liquid level detection device 100 except can be used to measure the liquid level lift data in the liquid storage container, still can be used to measure river, lake degree of depth etc. and detection principle between them is the same, only explains its theory of operation with the liquid level lift data in the measurement record liquid storage container here.
Alternatively, in order to make the lifting movement of the float 11 more stable and controllable, the float unit may further include a lifting guide 12 between the first position and the second position, and the float 11 may be capable of lifting movement along the lifting guide 12. Specifically, as shown in fig. 1 and 2, the float 11 may be in a ring shape, the lifting guide portion is a vertically arranged lifting guide rail column, and the float 11 is sleeved on the lifting guide rail column and can move up and down along the axial direction of the lifting guide rail column. Of course, in addition to the above structure of the float 11 and the lifting guide portion 12, the lifting guide portion 12 may also be a cylinder provided with a hollow float accommodating cavity, the float 11 is accommodated in the hollow float accommodating cavity, and the cylinder peripheral wall of the lifting guide portion 12 is provided with a plurality of through holes for communicating the inside and the outside of the hollow float accommodating cavity, or the float 11 and the lifting guide portion 12 may also be in other various structures, which is not limited to this.
Alternatively, in order to prevent the float 11 from escaping from the elevation guide 12 when the float 11 ascends to the second position, the top of the elevation guide 12 may be provided with a stopper 13 for stopping the float 11 from escaping from the elevation guide 12. Further, the liquid level detection apparatus may further include an apparatus body portion 3, and the elevation guide portion 12 and the pressure detection unit 2 are provided on a top wall of the apparatus body portion 3, respectively. The pressure detecting unit 2 may include a pressure sensor provided on a horizontal surface on which a first position, as shown in fig. 1 and 2, is provided on the top wall of the apparatus body portion 3, and when the liquid storage apparatus 200 does not contain liquid, the bottom surface of the float 11 is located on the first position, that is, the bottom surface of the float 11 is located on the top wall of the apparatus body portion 3 and on the same horizontal surface as the detection force receiving surface of the pressure detecting unit 2. When the liquid storage device 200 contains liquid, the float 11 floats upward along the lifting rail column by the buoyancy of the liquid.
Optionally, the utility model discloses a liquid level detection device still can include the control unit, can be provided with the control unit in the device body portion 3 and hold the chamber, and the control unit holds the control unit that the chamber can be used to holding liquid level detection device 100. The control unit may be configured to calculate a density ρ of the measured liquid, the density ρ satisfying:
wherein, F0Is a first pressure value, F1Is a second pressure value, H0Is the height difference between the first position and the second position, g is the gravitational acceleration, and S is the area of the detection force receiving portion of the pressure detection unit 2.
Specifically, the detection principle of the density ρ is as follows: when the liquid storage device 200 does not contain the liquid to be measured, the float 11 is located at the first position, that is, the float 11 is located on the top wall of the device body portion 3, and the first pressure value F of the pressure detection unit 2 at this time is recorded0Then, the liquid to be measured is slowly injected into the liquid storage device 200. So that the floater 11 is slowly floated upwards along the lifting guide rail column under the buoyancy of the measured liquid, and a second pressure value F of the pressure detection unit 2 is recorded at the moment that the floater 11 is floated upwards to a second position1Thus, the self-calibration is completed. The height difference between the first position and the second position is a set value H0At the time, the liquid level is H0The liquid pressure of the measured liquid on the pressure detecting unit 2 is (F)1-F0) Further, the density rho of the measured liquid can be calculated by the following formula,
wherein, in order to determine the height position of the float 11 more accurately, the liquid level detection apparatus 100 may further include a position identification unit for identifying the height position of the float 11. Specifically, the position recognition unit may include a first position magnetic field sensor provided at a first position and a second position magnetic field sensor provided at a second position, and the float 11 may include a magnetic member that is sensitive to the first position magnetic field sensor and the second position magnetic field sensor. The first position magnetic field sensor and the second position magnetic field sensor may be respectively disposed on the lifting guide 12, for example, when the lifting guide 12 is a lifting guide column, the first position magnetic field sensor may be disposed at a corresponding first position in the lifting guide column, and the second position magnetic field sensor may be disposed at a corresponding second position in the lifting guide column.
Specifically, when the float 11 is in the first position, the first position magnetic field sensor can just sense the float 11 and send a signal to the control unit, and the control unit records the first pressure value F of the pressure detection unit 2 at that time0(ii) a When the floater 11 is at the second position, the second position magnetic field sensor just can sense the floater 11 and send a signal to the control unit, and the control unit records a second pressure value F of the pressure detection unit 2 at the moment1. Of course, the position recognition unit may be, besides the magnetic field sensor, an infrared probe sensor or other position recognition device meeting the purpose of the present invention, for example, and the present invention is not limited thereto.
Optionally, the control unit may be configured to calculate a real-time level H of the measured liquid, the real-time level H satisfying:
wherein, F0Is a first pressure value, F1Is a second pressure value, H0Is the difference in height between the first and second positions, F2Is the pressure value corresponding to the real-time liquid level detected by the pressure detection unit 2.
Specifically, the detection principle of the real-time liquid level H is as follows: firstly, the liquid density of the liquid to be detected is detected according to the detection principle of the density rho
At this time, the measured liquid can be injected or reduced into the liquid storage device 200 at will, and after the injection or reduction is completed, the pressure value F of the pressure detection unit 2 at this time is recorded2At this time, the liquid pressure of the liquid to be measured with the real-time liquid level H on the pressure detection unit 2 is (F)2-F0) Then the corresponding real-time liquid level H can be calculated by the following formula:
further, the control unit of the liquid level detection apparatus 100 may be further configured to obtain a real-time volume of the liquid to be detected according to the shape of the liquid chamber 4 and the real-time liquid level H calculated by the liquid level detection apparatus 100. Specifically, for a liquid cavity with a regular shape, such as a cylinder, a cuboid, a cube, etc., the liquid volume in the liquid storage device 200 can be obtained by the product of the real-time liquid level H and the cross-sectional area of the liquid cavity 4; and the liquid level height calibration is needed for the liquid cavity 4 with irregular shape.
To sum up, the utility model discloses a liquid level detection device 100 can calculate the liquid density in liquid storage device 200 through the mode of self calibration fast to can acquire real-time liquid level height through pressure detection unit 2, and then calculate the liquid volume in liquid storage device 200. The accuracy of the liquid level detection apparatus 100 depends on the accuracy of the pressure detection unit 2 and the recognition accuracy of the position recognition unit.
The liquid level detection device 100 of the utility model has simple structure, easy assembly and low power consumption, and solves the problem of poor repeatability of the floating ball type measurement mode; simultaneously the utility model discloses a liquid level detection device 100 is compatible strong, and is compatible well to the liquid storage device 200 homoenergetic of the different degree of depth.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A liquid level detection device, characterized in that the liquid level detection device (100) comprises:
a float unit (1) comprising a float (11), said float (11) being movable up and down between a first position and a second position higher than said first position; and
the pressure detection unit (2) is at least used for detecting a first pressure value corresponding to the float (11) located at the first position and a second pressure value corresponding to the float (11) located at the second position.
2. The liquid level detection device according to claim 1, wherein the float unit (1) further comprises a lifting guide (12) between the first position and the second position, the float (11) being movable up and down along the lifting guide (12).
3. The liquid level detection device according to claim 2, wherein the float (11) is annular, the lifting guide portion (12) is a vertically arranged lifting guide rail column, and the float (11) is sleeved on the lifting guide rail column and can move up and down along the axial direction of the lifting guide rail column; and/or the presence of a gas in the gas,
the liquid level detection device (100) further comprises a device body portion (3) with a control unit accommodating cavity arranged therein, the control unit accommodating cavity is used for accommodating the control unit of the liquid level detection device (100), and the lifting guide portion (12) and the pressure detection unit (2) are respectively arranged on the top wall of the device body portion (3).
4. The liquid level detection apparatus according to claim 1, wherein the liquid level detection apparatus (100) further comprises a position identification unit for identifying a height position of the float (11), the position identification unit comprising a first position magnetic field sensor provided at the first position and a second position magnetic field sensor provided at the second position, the float (11) comprising a magnetic member that is sensitive to the first position magnetic field sensor and the second position magnetic field sensor.
5. The liquid level detection apparatus according to claim 1, wherein the pressure detection unit (2) comprises a pressure sensor arranged on a horizontal plane on which the first position is located.
6. The liquid level detection apparatus according to any one of claims 1 to 5, wherein the liquid level detection apparatus (100) further comprises:
a control unit configured to calculate a density ρ of the measured liquid, the density ρ satisfying:
wherein, F0Is the first pressure value, F1Is the second pressure value, H0G is a gravitational acceleration, and S is an area of a detection force receiving portion of the pressure detection unit (2).
7. The liquid level detection apparatus according to any one of claims 1 to 5, wherein the liquid level detection apparatus (100) further comprises:
a control unit configured to calculate a real-time level H of the measured liquid, the real-time level H satisfying:
wherein, F0Is the first pressure value, F1Is the second pressure value, H0Is the difference in height between the first position and the second position, F2The pressure value detected by the pressure detection unit (2) and corresponding to the real-time liquid level H.
8. The liquid storage device is characterized in that the liquid storage device (200) comprises a liquid containing cavity (4) and the liquid level detection device (100) according to any one of claims 1 to 7, the liquid level detection device (100) is arranged at the bottom of the liquid containing cavity (4), and a detection stress part of the pressure detection unit (2) and a zero liquid level position of the liquid containing cavity (4) are positioned on the same horizontal plane.
9. The liquid storage device according to claim 8, wherein the control unit of the liquid level detection device (100) is further configured to obtain a real-time volume of the measured liquid based on the shape of the liquid reservoir (4) and the real-time liquid level calculated by the liquid level detection device (100).
10. An unmanned aerial device, characterized in that the unmanned aerial device comprises a liquid storage arrangement (200) according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021361450.0U CN212378849U (en) | 2020-07-10 | 2020-07-10 | Liquid level detection device, liquid storage device and unmanned equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021361450.0U CN212378849U (en) | 2020-07-10 | 2020-07-10 | Liquid level detection device, liquid storage device and unmanned equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212378849U true CN212378849U (en) | 2021-01-19 |
Family
ID=74164014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021361450.0U Active CN212378849U (en) | 2020-07-10 | 2020-07-10 | Liquid level detection device, liquid storage device and unmanned equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212378849U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112114388A (en) * | 2019-06-21 | 2020-12-22 | 广州极飞科技有限公司 | Siphon type rain gauge calibration system and siphon type rain gauge calibration method |
| CN117309091A (en) * | 2023-12-01 | 2023-12-29 | 深圳市恒永达科技股份有限公司 | Liquid suction amount accuracy pressure detection method, system and readable storage medium |
-
2020
- 2020-07-10 CN CN202021361450.0U patent/CN212378849U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112114388A (en) * | 2019-06-21 | 2020-12-22 | 广州极飞科技有限公司 | Siphon type rain gauge calibration system and siphon type rain gauge calibration method |
| CN117309091A (en) * | 2023-12-01 | 2023-12-29 | 深圳市恒永达科技股份有限公司 | Liquid suction amount accuracy pressure detection method, system and readable storage medium |
| CN117309091B (en) * | 2023-12-01 | 2024-03-08 | 深圳市恒永达科技股份有限公司 | Liquid suction amount accuracy pressure detection method, system and readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7278311B1 (en) | Liquid level and density measurement device | |
| CN212378849U (en) | Liquid level detection device, liquid storage device and unmanned equipment | |
| US4646560A (en) | System and method for leak detection in liquid storage tanks | |
| EP1979722B1 (en) | Liquid level and density measurement device | |
| US4155254A (en) | Volume and density indicator system for liquids in tanks | |
| US4300388A (en) | Method for leakage measurement | |
| CN202119509U (en) | Liquidometer suitable for underground pond with large area | |
| CN101592513A (en) | Ocean engineering sink tank water level monitor | |
| EP0037419A4 (en) | Sensor for measuring leakage. | |
| CN114216479A (en) | Nondestructive detection method for bubbles inside liquid floating gyroscope | |
| CN105675437A (en) | Displacement difference solution density measuring equipment and measuring equipment thereof | |
| US6553822B2 (en) | Liquid volume measurement | |
| CN201107083Y (en) | Contrasting type liquid level measuring device | |
| CN112050715B (en) | Detection apparatus for foundation engineering construction sediment thickness | |
| CN112326073B (en) | Soil pressure measuring device for model test and calibration method thereof | |
| KR200334251Y1 (en) | Green slant measuring instrument of golf course | |
| KR200377152Y1 (en) | Liquid quantity sensing device | |
| US20180335303A1 (en) | Vertical side gradation in the a bulls-eye level for surface and edge levellingleveling, along with means for angle measurement | |
| CN215641216U (en) | Underwater water sample detection device arranged on unmanned aerial vehicle | |
| CN110567443A (en) | Electronic depth sounding rod | |
| CN217587167U (en) | White spirit concentration meter | |
| CN116772812A (en) | Multifunctional GPS control point | |
| CN213850118U (en) | Coffee machine and water outlet device thereof | |
| CN208780299U (en) | High-precision volume measurement device | |
| CN215363037U (en) | Liquid level measuring device for oil tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510000 Block C, 115 Gaopu Road, Tianhe District, Guangzhou City, Guangdong Province Patentee after: Guangzhou Jifei Technology Co.,Ltd. Address before: 510000 Block C, 115 Gaopu Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: Guangzhou Xaircraft Technology Co.,Ltd. |