CN112304395A - Intelligent water level wireless monitoring liquid level meter - Google Patents
Intelligent water level wireless monitoring liquid level meter Download PDFInfo
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- CN112304395A CN112304395A CN202011145843.2A CN202011145843A CN112304395A CN 112304395 A CN112304395 A CN 112304395A CN 202011145843 A CN202011145843 A CN 202011145843A CN 112304395 A CN112304395 A CN 112304395A
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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
- G01F23/30—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 floats
- G01F23/56—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 floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements
- G01F23/58—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 floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements using mechanically actuated indicating means
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to the technical field of water level monitoring devices and discloses an intelligent water level wireless monitoring liquid level meter which comprises a box body, wherein a fixed rod is fixedly installed at the bottom end of the box body, a movable rod is movably sleeved at the bottom end of the fixed rod, limiting grooves are formed in the left side and the right side of an inner cavity of the fixed rod, and limiting strips are fixedly installed at the left end and the right end of the movable rod. This wireless monitoring liquid level meter of intelligence water level, it can drive reciprocating of movable rod to reciprocate through the removal of floater following the liquid level, it can take place to remove between the relative spacing groove under the drive of spacing to be located the movable rod this moment, reset spring is compressed simultaneously, the slope appears when preventing movable rod relative displacement, reset spring can be compressed and through pressure to pressure block this moment, the pressure block is with pressure conduction to pressure sensor accomplish the measurement of pressure and then measure the change of liquid level, thereby realized can preventing that the floater slope from leading to measuring numerical value and changing the advantage.
Description
Technical Field
The invention relates to the technical field of water level monitoring devices, in particular to an intelligent wireless water level monitoring liquid level meter.
Background
The height of the liquid medium in the container is called the liquid level, and the instrument for measuring the liquid level is called a liquid level meter. The liquid level meter is one of level meters. The type of the liquid level meter comprises a tuning fork vibration type, a magnetic suspension type, a pressure type, ultrasonic waves, sonar waves, a magnetic turning plate, radar and the like. The floating ball type liquid level device has simple structure, long service life and wide application. The float ball liquid level transmitter is widely used in the industries of oil refining, chemical industry, paper making, food, sewage treatment and the like. The medium liquid level in the opening, the closed container or the underground tank can be displayed, alarmed and controlled in the instrument control room. The detected medium can be conductive and non-conductive liquid such as water, oil, acid, alkali, industrial sewage and the like, and can overcome the influence of false liquid level caused by liquid foam. The floating ball liquid level meter structure is mainly designed and produced based on the buoyancy and static magnetic field principle. The position of a floating ball (called the floating ball for short) with a magnet in a measured medium is influenced by the action of buoyancy: the change in the liquid level results in a change in the position of the magnetic float. The magnet in the float ball and the sensor (magnetic reed switch) act to change the number of the elements (such as fixed value resistor) connected in series with the circuit, thereby changing the electrical quantity of the instrument circuit system. I.e. such that a change in the position of the magnetic float causes a change in the electrical quantity. The change of the electrical quantity is detected to reflect the condition of the liquid level in the container. And a magnetic flip plate level gauge: also called magnetic float level meter, magnetic column-turning level meter. The communicating vessel principle is developed according to the buoyancy principle and the magnetic coupling effect, when the liquid level in a detected container rises and falls, the permanent magnetic steel in the floater is transmitted to the magnetic turning column indicating panel through magnetic coupling, so that the red-white turning column turns over 180 degrees, when the liquid level rises, the turning column turns from white to red, when the liquid level falls, the turning column turns from red to white, and the junction of the red and the white on the panel is the actual height of the liquid level in the container, thereby realizing the liquid level display. And when the sensor of the magnetostrictive liquid level meter works, the circuit part of the sensor excites pulse current on the waveguide wire, and the pulse current magnetic field is generated around the waveguide wire when the current propagates along the waveguide wire. A float is arranged outside a sensor measuring rod of the magnetostrictive liquid level meter, and the float can move up and down along the measuring rod along with the change of the liquid level. A group of permanent magnetic rings is arranged in the floater. When the pulse current magnetic field meets the magnetic ring magnetic field generated by the floater, the magnetic field around the floater changes, so that the waveguide wire made of magnetostrictive material generates a torsional wave pulse at the position of the floater, and the pulse is transmitted back along the waveguide wire at a fixed speed and is detected by the detection mechanism. The position of the float, i.e. the position of the liquid level, can be accurately determined by measuring the time difference between the pulse current and the torsional wave. The RF admittance material level instrument consists of a sensor and a control instrument, wherein the sensor can be arranged on the top of the bin by adopting a rod type, coaxial or cable type probe. The pulse card in the sensor can convert the material level change into a pulse signal and send the pulse signal to the control instrument, and the control instrument converts the pulse signal into engineering quantity after operation processing and displays the engineering quantity, thereby realizing the continuous measurement of the material level.
The level gauge structure variety that uses at present is more, generally can select suitable level gauge according to all ring edge borders and working strength when using, the floater formula level gauge that uses on the market at present mainly utilizes Archimedes principle to realize, utilize the difference of the produced buoyancy of the increase of liquid level, lead to the upper and lower position of floater to change, can lead to the electric quantity of the inside sensor of level gauge to change and then realize the measurement to the liquid level through the connecting rod of connecting the floater this moment, though when the in-service use, the floater can change and reciprocate along with the change of liquid level, but because the wind-force of liquid level and the strength that leads to the floater to produce the slope and order about the connecting rod and take place the slope and remove and lead to the sensor easily to record data and change, influence measured data.
Present level gauge generally can install the level gauge when using simultaneously and be close to from the liquid level, and the installation department is generally fixed unchangeable, because the floater can carry out the lift of height along with the liquid level when in actual use, whole device is in the motion state this moment, and because the device passes through and fixes between mounting panel isotructure and the stationary plane, so long-time use back very easily leads to because of fixed lack of compensation buffer results in fixed appearance not hard up phenomenon.
Because of the inside of the level gauge that adopts at present generally includes the sensor and is used for measuring the change of electric current or pressure, and the sensor itself needs the outside power supply just can guarantee the operation, generally adopts the battery to carry out the power supply of sensor as the external energy source among the current device, nevertheless the condition that the electric quantity exhausts easily appears in the battery after using for a long time, needs to change it, does not set up the device of outside power supply among the current device, leads to often needing to change the battery, causes the decline of convenience.
Disclosure of Invention
The invention provides an intelligent water level wireless monitoring liquid level meter which has the advantages of preventing the change of a measured value caused by the inclination of a floating ball, having a compensation buffer device and multiple power supply modes for a storage battery and solving the problems in the background technology.
The invention provides the following technical scheme: the utility model provides an intelligence water level wireless monitoring liquid level meter, the power distribution box comprises a box body, the bottom fixed mounting of box has the dead lever, the movable rod has been cup jointed in the bottom activity of dead lever, the spacing groove has all been seted up to the left and right sides of dead lever inner chamber, the equal fixed mounting in both ends has spacing about the movable rod, the movable rod passes through spacing and spacing groove activity joint, the top fixed mounting of spacing has the reset spring who is located spacing inslot portion, reset spring's top and the top fixed connection of spacing inslot chamber, the top fixed mounting of movable rod has the pressure spring who is located the dead lever inside, the bottom fixed mounting of box inner chamber has pressure sensor, pressure sensor's bottom fixed mounting has the pressure block, the bottom of pressure block contacts with pressure spring's top.
Preferably, the bottom fixed mounting of movable rod has the floater, the length of movable rod is greater than the length of fixed rod, the diameter of floater is greater than the diameter of movable rod, the length of movable rod is ten meters, the diameter of floater is fifty centimetres, when the liquid level of liquid changes, will lead to the floater to follow the removal of liquid level and reciprocate and can drive reciprocating of movable rod promptly because of the effect of buoyancy this moment, lies in this moment the movable rod and can move between the relative spacing groove under spacing strip's drive, and reset spring is compressed simultaneously, appears the slope when preventing the movable rod relative displacement.
Preferably, the bottom fixed mounting of box inner chamber has the battery that is located the pressure sensor top, the left side fixed mounting of battery has wireless module, the output and the wireless module and the pressure sensor electric connection of battery, battery can supply power for pressure sensor and wireless module, and the measured data accessible wireless module of pressure sensor carries out remote transmission to user terminal simultaneously on, need not staff's scene and looks over.
Preferably, the fixed disk has been cup jointed to the top of box lateral surface, the equal fixed mounting in four corners department of fixed disk has the fixed column, the activity groove that runs through completely is seted up on the top of fixed column, the inside movable mounting in activity groove has the movable block, the one end fixed mounting of movable block has the spacing spring that is located the activity inslot portion, one side movable mounting in activity groove has fixing bolt, fixing bolt's one side and movable block contact, when the device leads to device itself to take place to remove because the floater position changes, the movable block that is located the fixing bolt side this moment can absorb partial vibration and then compress spacing spring and drive and take place to remove between the relative fixing bolt of fixed disk, avoids device itself to appear becoming flexible.
Preferably, the front side and the rear side of the top end of the box body are fixedly provided with solar panels, the middle part of the inner cavity of the box body is movably provided with a main shaft, the left end and the right end of the main shaft penetrate through the left end and the right end of the box body and are fixedly provided with impellers, the outer side surface of the main shaft is movably sleeved with a belt, the inner cavity of the box body is provided with a generator positioned above the main shaft, the left end and the right end of the generator are fixedly provided with fixed frames, the outer side surface of each fixed frame is fixedly connected with the inner cavity of the box body, the two ends of the input shaft of the generator are fixedly provided with transmission shafts, the other end of the belt is movably sleeved with the transmission shafts, the solar panels can absorb light energy and convert the light energy into electric energy to supply power for the storage batteries, the impellers are, finally, the input shaft of the generator is driven to rotate, mechanical energy is converted into electric energy, and the electric energy is used for supplying power for the storage battery.
Preferably, the output of solar panel and generator and the input electric connection of battery, solar panel absorb light energy conversion and become the electric energy and the generator can all transmit the inside of battery to charge for the battery because of the produced electric energy of mechanical energy.
The invention has the following beneficial effects:
1. this wireless monitoring liquid level meter of intelligence water level, through there being the dead lever bottom fixed mounting, and the movable rod has been cup jointed in the bottom activity of dead lever, the accessible is placed the floater in the liquid of awaiting measuring when using, when the liquid level of liquid changes, the effect of buoyancy will lead to the floater to follow the removal of liquid level and reciprocate and can drive reciprocating of movable rod this moment, it can move between the relative spacing groove under spacing strip's drive to be located the movable rod this moment, reset spring is compressed simultaneously, the slope appears when preventing movable rod relative displacement, reset spring can be compressed and through pressure to pressure block this moment, pressure block is conducted pressure to pressure sensor and is accomplished the measurement of pressure and then measure the change of liquid level, thereby realized can preventing that the floater slope leads to measuring value to change's advantage.
2. This wireless monitoring liquid level meter of intelligence water level, it has the fixed disk to connect through the fixed cover in the top of box lateral surface, and be fixed with the fixed column in the four corners department of fixed disk, and the movable groove has been seted up on the top of fixed column, accessible fixing bolt fixes the device and places such as ground when needs fix the device, when the device leads to device itself to take place to remove because the floater position changes, the movable block that is located the fixing bolt side this moment can absorb partial vibration and then take place to remove between the compression spacing spring drive fixed disk relatively fixed bolt, avoid device itself to appear not hard up, thereby realized the advantage that has compensation buffer.
3. This wireless monitoring liquid level meter of intelligence water level, top through at the box is fixed with solar panel, when this box was installed and is used on the liquid level, accessible solar panel absorbed light energy and is supplied power for the battery for the electric energy, be equipped with the impeller simultaneously at the both ends of box, the impeller can follow the flow of liquid level liquid and rotate the rotation that drives the main shaft, the belt of main shaft lateral surface can drive the rotation of transmission shaft this moment, the final input shaft that drives the generator is rotatory to convert mechanical energy into the electric energy and supply power for the battery, prevent that the battery power is not enough, thereby realized possessing the multiple advantage for the battery power supply mode.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of the anchor stud structure of the present invention;
FIG. 3 is a schematic view of the internal structure of the case of the present invention;
FIG. 4 is a cross-sectional view of the internal structure of the present invention;
FIG. 5 is an enlarged schematic view of the structure at A in FIG. 2;
fig. 6 is an enlarged schematic view of the structure at B in fig. 4.
In the figure: 1. a box body; 2. a storage battery; 3. a wireless module; 4. a fixed mount; 5. a generator; 6. a main shaft; 7. a drive shaft; 8. an impeller; 9. a belt; 10. a solar panel; 11. fixing the disc; 12. fixing a column; 13. a movable groove; 14. a movable block; 15. a limiting spring; 16. fixing the bolt; 17. fixing the rod; 18. a movable rod; 19. a limiting groove; 20. a return spring; 21. a limiting strip; 22. a pressure block; 23. a pressure spring; 24. a pressure sensor; 25. a floating ball.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, an intelligent wireless water level monitoring liquid level meter comprises a tank body 1, a fixed rod 17 is fixedly mounted at the bottom end of the tank body 1, a movable rod 18 is movably sleeved at the bottom end of the fixed rod 17, limiting grooves 19 are formed in the left side and the right side of an inner cavity of the fixed rod 17, limiting strips 21 are fixedly mounted at the left end and the right end of the movable rod 18, the movable rod 18 is movably clamped with the limiting grooves 19 through the limiting strips 21, a reset spring 20 located inside the limiting grooves 19 is fixedly mounted at the top end of the limiting strips 21, the top end of the reset spring 20 is fixedly connected with the top end of the inner cavity of the limiting grooves 19, a pressure spring 23 located inside the fixed rod 17 is fixedly mounted at the top end of the inner cavity of the tank body 1, a pressure sensor 24 is fixedly mounted at the bottom end of the pressure sensor 24, and a pressure block 22 is.
Wherein, the bottom fixed mounting of movable rod 18 has the floater 25, the length of movable rod 18 is greater than the length of dead lever 17, the diameter of floater 25 is greater than the diameter of movable rod 18, the length of movable rod 18 is ten meters, the diameter of floater 25 is fifty centimetres, when the liquid level of liquid changes, this moment will lead to the floater 25 to follow the removal of liquid level and reciprocate and can drive reciprocating motion of movable rod 18 because of the effect of buoyancy, it can move to lie in movable rod 18 this moment and take place between the relative spacing groove 19 under the drive of spacing strip 21, reset spring 20 is compressed simultaneously, the slope appears when preventing the relative displacement of movable rod 18.
Wherein, the bottom fixed mounting in the 1 inner chamber of box has the battery 2 that is located 24 tops of pressure sensor, the left side fixed mounting of battery 2 has wireless module 3, battery 2's output and wireless module 3 and 24 electric connection of pressure sensor, battery 2 can supply power for pressure sensor 24 and wireless module 3, the data accessible wireless module 3 that pressure sensor 24 measured simultaneously carry out teletransmission to user terminal on, need not staff's scene and look over.
Wherein, the top of the outer side surface of the box body 1 is fixedly sleeved with a fixed disc 11, four corners of the fixed disc 11 are fixedly provided with fixed columns 12, the top end of the fixed column 12 is provided with a movable groove 13 which completely penetrates through, the inside of the movable groove 13 is movably provided with a movable block 14, one end of the movable block 14 is fixedly provided with a limiting spring 15 which is positioned inside the movable groove 13, one side of the movable groove 13 is movably provided with a fixed bolt 16, one side of the fixed bolt 16 is contacted with the movable block 14, when the device needs to be fixed, the device can be fixed with the ground and the like through the fixing bolt 16, when the device moves due to the change of the position of the floating ball 25, the movable block 14 positioned on the side surface of the fixed bolt 16 can absorb part of vibration and further compress the limiting spring 15 to drive the fixed plate 11 to move relative to the fixed bolt 16, so that the device is prevented from loosening.
Wherein, the front and back sides of the top end of the box body 1 are fixedly provided with solar panels 10, the middle part of the inner cavity of the box body 1 is movably provided with a main shaft 6, the left and right ends of the main shaft 6 penetrate through the left and right ends of the box body 1 and are fixedly provided with impellers 8, the outer side surface of the main shaft 6 is movably sleeved with a belt 9, the inner cavity of the box body 1 is provided with a generator 5 positioned above the main shaft 6, the left and right ends of the generator 5 are fixedly provided with fixed frames 4, the outer side surface of the fixed frame 4 is fixedly connected with the inner cavity of the box body 1, the two ends of the input shaft of the generator 5 are fixedly provided with transmission shafts 7, the other end of the belt 9 is movably sleeved with the transmission shafts 7, the solar panels 10 can absorb light energy and convert the light energy into electric energy to supply power for the storage battery 2, the impellers 8 are arranged at the two, finally, the input shaft of the generator 5 is driven to rotate, mechanical energy is converted into electric energy, and the electric energy is used for supplying power for the storage battery 2.
Wherein, solar panel 10 and generator 5's output and battery 2's input electric connection, solar panel 10 absorbs the light energy conversion and becomes the electric energy and generator 5 can all transmit the inside of battery 2 for the battery charges because of the produced electric energy of mechanical energy.
The working principle is that when the intelligent wireless water level monitoring liquid level meter is used, when the liquid level of liquid changes, the floating ball 25 moves up and down along with the movement of the liquid level under the action of buoyancy force, so that the movable rod 18 can be driven to move up and down, the movable rod 18 can move between the relative limiting grooves 19 under the drive of the limiting strips 21, the reset spring 20 is compressed to prevent the movable rod 18 from tilting when moving relatively, the reset spring 20 can be compressed and transmits pressure to the pressure block 22, the pressure block 22 transmits the pressure to the pressure sensor 24 to complete the measurement of the pressure so as to measure the change of the liquid level, when the box body 1 is installed on the liquid level for use, the solar panel 10 can absorb light energy and convert the light energy into electric energy to supply power for the storage battery 2, the impellers 8 are arranged at two ends of the box body 1, the impellers 8 can rotate along with the flow of the liquid level to drive the rotation of the main shaft 6, at this time, the belt 9 on the outer side surface of the main shaft 6 can drive the transmission shaft 7 to rotate, and finally the input shaft of the generator 5 is driven to rotate, so that mechanical energy is converted into electric energy and the electric energy is supplied to the storage battery 2.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a wireless monitoring liquid level meter of intelligence water level, includes box (1), its characterized in that: the bottom fixed mounting of box (1) has dead lever (17), movable rod (18) has been cup jointed in the bottom activity of dead lever (17), spacing groove (19) have all been seted up to the left and right sides of dead lever (17) inner chamber, the equal fixed mounting in both ends has spacing (21) about movable rod (18), movable rod (18) pass through spacing (21) and spacing groove (19) activity joint, the top fixed mounting of spacing (21) has reset spring (20) that is located inside spacing groove (19), the top of reset spring (20) and the top fixed connection of spacing groove (19) inner chamber, the top fixed mounting of movable rod (18) has pressure spring (23) that is located inside dead lever (17), the bottom fixed mounting of box (1) inner chamber has pressure sensor (24), the bottom fixed mounting of pressure sensor (24) has pressure block (22), the bottom end of the pressure block (22) is in contact with the top end of the pressure spring (23).
2. The intelligent wireless water level monitoring liquid level meter according to claim 1, wherein: the bottom end of the movable rod (18) is fixedly provided with a floating ball (25), the length of the movable rod (18) is greater than that of the fixed rod (17), the diameter of the floating ball (25) is greater than that of the movable rod (18), the length of the movable rod (18) is ten meters, and the diameter of the floating ball (25) is fifty centimeters.
3. The intelligent wireless water level monitoring liquid level meter according to claim 1, wherein: the bottom fixed mounting of box (1) inner chamber has battery (2) that are located pressure sensor (24) top, the left side fixed mounting of battery (2) has wireless module (3), the output and wireless module (3) and pressure sensor (24) electric connection of battery (2).
4. The intelligent wireless water level monitoring liquid level meter according to claim 1, wherein: the fixed cover in top of box (1) lateral surface has been connect fixed disk (11), the equal fixed mounting in four corners department of fixed disk (11) has fixed column (12), movable groove (13) that run through completely are seted up on the top of fixed column (12), the inside movable mounting in movable groove (13) has movable block (14), the one end fixed mounting of movable block (14) has spacing spring (15) that are located movable groove (13) inside, one side movable mounting in movable groove (13) has fixing bolt (16), one side and the movable block (14) of fixing bolt (16) contact.
5. The intelligent wireless water level monitoring liquid level meter according to claim 1, wherein: the utility model discloses a solar energy water heater, including box (1), inner chamber, belt (9) have been cup jointed in the middle part movable mounting of box (1) inner chamber, both ends and fixed mounting have impeller (8) about both ends all run through box (1) about main shaft (6), belt (9) have been cup jointed in the lateral surface activity of main shaft (6), the inner chamber of box (1) is equipped with generator (5) that are located main shaft (6) top, both ends fixed mounting has mount (4) about generator (5), the lateral surface and box (1) inner chamber fixed connection of mount (4), the equal fixed mounting in both ends of generator (5) input shaft has transmission shaft (7), the other end and the transmission shaft (7) activity of belt (9) are cup jointed.
6. The intelligent wireless water level monitoring liquid level meter according to claim 5, wherein: the output ends of the solar panel (10) and the generator (5) are electrically connected with the input end of the storage battery (2).
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| CN202011145843.2A CN112304395A (en) | 2020-10-23 | 2020-10-23 | Intelligent water level wireless monitoring liquid level meter |
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| CN202011145843.2A CN112304395A (en) | 2020-10-23 | 2020-10-23 | Intelligent water level wireless monitoring liquid level meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115980297A (en) * | 2023-03-20 | 2023-04-18 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Hydrogeology is monitoring devices for investigation |
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