CN109471462A - A kind of liquid level intelligent monitoring device - Google Patents
A kind of liquid level intelligent monitoring device Download PDFInfo
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- CN109471462A CN109471462A CN201811562795.XA CN201811562795A CN109471462A CN 109471462 A CN109471462 A CN 109471462A CN 201811562795 A CN201811562795 A CN 201811562795A CN 109471462 A CN109471462 A CN 109471462A
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- liquid level
- liquid case
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of liquid level intelligent monitoring devices, including water inlet pipe, liquid case, outlet pipe and power supply, the liquid case is closed hollow cylindrical structure, water inlet pipe is fixedly installed on the cylindrical outer surface of the liquid case, the bottom of the liquid case is equipped with outlet pipe, it is respectively arranged on the water inlet pipe and outlet pipe into water control switch and water control switch out, the lower surface of the liquid case is fixedly connected with U-tube, it is hollow structure inside the U-tube, the first fixing buckle and the second fixing buckle are movably installed on the outer wall of the U-tube, second fixing buckle is located at the underface of liquid case, first fixing buckle is located at the centre of U-tube.The internal circuit of signal processing module uses the differential DC bridge circuit of full-bridge in the present invention, the bridge circuit of this structure can effectively reduce nonlinearity erron, sensitivity is improved, while also there is temperature compensation function, has the characteristics that structure is simple, at low cost, precision is high and easy maintenance.
Description
Technical field
The present invention relates to a kind of liquid level intelligent monitoring devices, specifically liquid level height measuring device, belong to intelligence
It can detection technique field.
Background technique
Liquid level monitoring device is widely used in white domestic appliances water tank, solar water container, water tower, level control box, mine
The fields such as well, petrochemical industry and water conservancy construction, the accurate monitoring of liquid level is to the safe operation of equipment and keeps the safety in production
Vital effect is arrived.
Many to the device type of liquid level monitoring at present, common in the market there are mainly two types of, and one is letters
Single mechanical control device, such as float type, the structure of this monitoring device is relatively simple, low in cost, but precision is not high, no
It can be carried out relevant numerical value to show, extremely easily cause accidentally control and can only individually be controlled；Another kind is based on complicated control
The device of device control processed, for mechanical, measurement accuracy is higher, but price is more expensive, is based on drawbacks described above, the present invention
Propose a kind of liquid level intelligent monitoring device based on fexible film pressure sensor, adequate solution is above-mentioned mentioned
Some problems.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, and the structure designed is simple, at low cost, precision
High and easy maintenance.
To achieve the above object, the technical scheme adopted by the invention is as follows:
According to technical solution provided by the invention: a kind of liquid level intelligent monitoring device, including water inlet pipe, liquid case, go out
Water pipe and power supply, the liquid case are closed hollow cylindrical structure, be fixedly installed on the cylindrical outer surface of the liquid case into
Water pipe, the bottom of the liquid case are equipped with outlet pipe, be respectively arranged on the water inlet pipe and outlet pipe into water control switch and
Water control switch out, the lower surface of the liquid case are fixedly connected with U-tube, are hollow structure, the U-shaped inside the U-tube
The first fixing buckle and the second fixing buckle are movably installed on the outer wall of pipe, second fixing buckle is located at the underface of liquid case, institute
The centre that the first fixing buckle is located at U-tube is stated, the end of the U-tube is fixedly connected with liquid level cushion chamber, the liquid level buffering
Chamber is connected with protective cover by connecting tube, has been left and right symmetrically arranged bracket on the inner wall of the protective cover, on two brackets
It is fixedly installed with power supply and signal processing module respectively, a nanometer fexible film is fixedly installed in the inner bottom surface of the protective cover
Pressure sensor is provided with through-hole, one end of the through-hole and nanometer fexible film pressure sensing on the bottom surface of the protective cover
Device contact, the other end of the through-hole are connect with connecting tube.
As a further improvement of the present invention, the liquid level cushion chamber and protective cover are hollow structure.
As a further improvement of the present invention, the lower surface of the protective cover and the lower surface of liquid case are equal.
As a further improvement of the present invention, the cross sectional shape of the through-hole is trapezium structure, the big opening end of the through-hole
Upward, the osculum end of the through-hole downward, the big opening end of the through-hole and nanometer fexible film pressure sensor spatially phase
Matching contact, the diameter at through-hole osculum end are identical as the internal diameter of connecting tube.
As a further improvement of the present invention, the lower surface inside the liquid case and the junction of U-tube are fixedly installed
Filter screen.
As a further improvement of the present invention, the nanometer fexible film pressure sensor is by the first flexible substrate, flexibility
Electrode layer, supporting layer, the second flexible substrate, pressure sensitive layer and flexible package layer form, under second flexible substrate
Surface is equipped with pressure sensitive layer, and the upper surface of first flexible substrate is equipped with flexible electrode layer, the pressure sensitive layer
It is connect with flexible electrode layer by the supporting layer of two sides, the flexible package layer is covered in the first flexible substrate and the second flexible liner
The edge at bottom.
As a further improvement of the present invention, the nanometer fexible film pressure sensor passes through electrical output signal and letter
Number processing module is electrically connected, and the signal processing module is connected with display module and control system respectively, the control system
On be respectively arranged with water gate control module and alarm module, the water gate control module respectively with water inlet control switch and water control out
System switch is electrically connected, and is equipped with subscription parameters and state of a control setting module in the control system, the subscription parameters and
State of a control setting module is electrical connected with control system, the power supply and nanometer fexible film pressure sensor, signal processing
Module, display module and control system are separately connected.
Compared with the prior art, the invention has the following advantages:
1), the present invention is fixedly installed filter screen, filter screen by the junction of lower surface and U-tube inside liquid case
Setting can be entered in U-tube to avoid the sundries in liquid case, and in the invention setting of liquid level cushion chamber can reduce because
The fluctuation of liquid level in liquid case and to nanometer fexible film pressure sensor bring monitor error.
2), the present invention is by being internally provided with pressure sensitive layer in nanometer fexible film pressure sensor, when pressure is quick
When feel layer is stimulated by ambient pressure, the resistivity of pressure sensitive material changes, so as to cause nanometer fexible film pressure
The change of sensor output resistance, and then realize the accurate perception changed to pressure size.
3), letter of the present invention by being provided with the control system of signal processing module and single-chip microcontroller, in signal processing module
The processing such as received electrical signal is carried out preposition amplification by number processing circuit, shaping, filtering, A/D are converted are transformed into digital signal
It is transmitted to single-chip microcontroller, is compared through the parameter between single-chip microcontroller operation and scheduled resistance value-liquid level, PID arithmetic is carried out, obtains
Adjustable parameter inputs to control system via D/A transformation and executes corresponding control command, thus complete into draining it is intelligent with
And the purpose of automation control.
4), the internal circuit of signal processing module uses the differential DC bridge circuit of full-bridge, the electricity of this structure in the present invention
Bridge circuit can effectively reduce nonlinearity erron, improve sensitivity, while also having temperature compensation function, it is seen that the device has
The characteristics of structure is simple, at low cost, precision is high and easy maintenance.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is the schematic diagram of internal structure of protective cover of the invention.
Fig. 3 is the schematic diagram of internal structure of liquid case of the invention.
Fig. 4 is the schematic diagram of internal structure of nanometer fexible film pressure sensor of the invention.
Fig. 5 is circuit connection diagram of the invention.
In figure: 1, control switch of intaking；2, water inlet pipe；3, liquid case；4, outlet pipe；5, go out water control switch；6, protective cover；
7, connecting tube；8, liquid level cushion chamber；9, U-tube；10, the first fixing buckle；11, the second fixing buckle；12, power supply；13, bracket；14,
Nanometer fexible film pressure sensor；15, signal processing module；16, through-hole；17, filter screen；18, flexible package layer；19, it props up
Support layer；20, the second flexible substrate；21, pressure sensitive layer；22, flexible electrode layer；23, the first flexible substrate；24, display module；
25, control system；26, water gate control module；27, alarm module；28, subscription parameters and state of a control setting module.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
As shown in Figs. 1-5, a kind of liquid level intelligent monitoring device, including water inlet pipe 2, liquid case 3, outlet pipe 4 and power supply
12, the liquid case 3 is closed hollow cylindrical structure, is fixedly installed with water inlet pipe 2 on the cylindrical outer surface of the liquid case 3,
The bottom of the liquid case 3 is equipped with outlet pipe 4, is respectively arranged on the water inlet pipe 2 and outlet pipe 4 into 1 He of water control switch
Water control switch 5 out, the lower surface of the liquid case 3 are fixedly connected with U-tube 9, are hollow structure inside the U-tube 9, described
The first fixing buckle 10 and the second fixing buckle 11 are movably installed on the outer wall of U-tube 9, second fixing buckle 11 is located at liquid case 3
Underface, first fixing buckle 10 is located at the centre of U-tube 9, and the end of the U-tube 9 is fixedly connected with liquid level buffering
Chamber 8, the liquid level cushion chamber 8 are connected with protective cover 6 by connecting tube 7, have been left and right symmetrically arranged on the inner wall of the protective cover 6
Bracket 13 is fixedly installed with power supply 12 and signal processing module 15, the inside of the protective cover 6 on two brackets 13 respectively
It is fixedly installed a nanometer fexible film pressure sensor 14 on bottom surface, through-hole 16 is provided on the bottom surface of the protective cover 6, it is described
One end of through-hole 16 is contacted with nanometer fexible film pressure sensor 14, and the other end of the through-hole 16 is connect with connecting tube 7.
As illustrated in fig. 1 and 2, wherein the liquid level cushion chamber 8 and protective cover 6 are hollow structure, and liquid level cushion chamber 8
The area of bottom inner surface is far longer than the sectional dimension of U-tube 9, therefore when the liquid level in liquid case 3 constantly fluctuates, pass through liquid level
Cushion chamber 8 can make the liquid fluctuation in connecting tube 7 more steady, the pressure that nanometer fexible film pressure sensor 14 detects
Signal is constant, so as to reduce because in liquid case 3 fluctuation of liquid level due to bring monitoring error.
As shown in Figure 1, wherein the lower surface of the protective cover 6 is equal with the lower surface of liquid case 3, thus when in connecting tube 7
When hydraulically full, the pressure signal that nanometer fexible film pressure sensor 14 detects is zero.
As shown in Figure 2, wherein the cross sectional shape of the through-hole 16 be trapezium structure, the big opening end of the through-hole 16 upward,
The osculum end of the through-hole 16 downward, the big opening end of the through-hole 16 and nanometer fexible film pressure sensor 14 spatially phase
Matching contact, the diameter at the 16 osculum end of through-hole is identical as the internal diameter of connecting tube 7, when liquid is from osculum end into big opening end goes out
When, contact surface is wider between big opening end and nanometer fexible film pressure sensor 14, therefore nanometer fexible film pressure can be made to pass
The effect that sensor 14 detects is more preferable.
As shown in Figure 3, wherein the junction of lower surface and U-tube 9 inside the liquid case 3 is fixedly installed filter screen
17, the setting of filter screen 17 can enter in U-tube 9 to avoid the sundries in liquid case 3.
As shown in Figure 4, wherein the nanometer fexible film pressure sensor 14 is by the first flexible substrate 23, flexible electrode
Layer 22, supporting layer 19, the second flexible substrate 20, pressure sensitive layer 21 and flexible package layer 18 form, second flexible liner
The lower surface at bottom 20 is equipped with pressure sensitive layer 21, and the upper surface of first flexible substrate 23 is equipped with flexible electrode layer 22,
The pressure sensitive layer 21 and flexible electrode layer 22 are connect by the supporting layer 19 of two sides, and the flexible package layer 18 is covered in the
The edge of one flexible substrate 23 and the second flexible substrate 20, to play the function of waterproof, and when nanometer fexible film pressure passes
Pressure sensitive layer 21 inside sensor 14 is under pressure when stimulating, because the variation of pressure sensitive material resistivity leads to pressure sensing
Device output resistance variation, to realize the accurate perception to pressure size.
As shown in Figure 5, wherein the nanometer fexible film pressure sensor 14 passes through electrical output signal and signal processing
Module 15 is electrically connected, and the signal processing module 15 is connected with display module 24 and control system 25 respectively, the control system
Water gate control module 26 and alarm module 27 are respectively arranged on system 25, the water gate control module 26 is opened with water inlet control respectively
It closes 1 and water control switch 5 is electrically connected out, subscription parameters and state of a control setting module are installed in the control system 25
28, the subscription parameters and state of a control setting module 28 are electrical connected with control system 25, and the power supply 12 and nanometer are flexible
Diaphragm pressure sensor 14, signal processing module 15, display module 24 and control system 25 are separately connected, display module 24
Be arranged can liquid level in real-time display liquid case 3, when the adjustable parameter and subscription parameters and control that control system 25 calculates
Whens the high and low limit value of liquid level set by state setting module 28 is not equal, alarm module 27 just be will call the police, and signal processing module
Circuit in 15 uses the differential DC bridge circuit of full-bridge, so as to effectively reduce nonlinearity erron, improves sensitivity, simultaneously
Also there is temperature compensation function.
It should be noted that the present invention is a kind of liquid level intelligent monitoring device, when work, pass through the first fixing buckle 10
The device is fixed with the second fixing buckle 11, after liquid flows into liquid case 3 from water inlet pipe 2, liquid runs down U-tube 9 is entered
In liquid level cushion chamber 8, and make the continuous rising of liquid level in liquid level cushion chamber 8, until with the nanometer flexible thin membrane pressure in protective cover 6
Force snesor 14 contacts, and when the height of water level in liquid case 3 constantly changes, nanometer fexible film pressure sensor 14 can be felt
The pressure known also changes therewith, and nanometer fexible film pressure sensor 14 can be acquired fluid pressure signal, and turns
It changes corresponding electrical output signal into and is sent to signal processing module 15, signal processing module 15 feeds back to control after calculation process
System 25 processed, calculate adjustable parameter and with the high and low limit value of liquid level set by subscription parameters and state of a control setting module 28
It compares, to determine 26 pairs of water inlet control switches 1 of water gate control module and water control switch 5 carries out accordingly into draining out
Whether control and control system 25 trigger corresponding alarm module 27, it is final realize in liquid case 3 into the intelligence of draining and
The purpose of automation control is detected in addition, the present apparatus can be used for water level height in the washing tub of automatic washing machine, can also be used
In controling and monitoring for the liquid levels such as solar water container, water tower, level control box.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (7)
1. a kind of liquid level intelligent monitoring device, including water inlet pipe (2), liquid case (3), outlet pipe (4) and power supply (12), special
Sign is: the liquid case (3) is closed hollow cylindrical structure, is fixedly installed on the cylindrical outer surface of the liquid case (3)
The bottom of water inlet pipe (2), the liquid case (3) is equipped with outlet pipe (4), is respectively set on the water inlet pipe (2) and outlet pipe (4)
Have into water control switch (1) and water control switch (5) out, the lower surface of the liquid case (3) is fixedly connected with U-tube (9), described
It is hollow structure inside U-tube (9), the first fixing buckle (10) and second is movably installed on the outer wall of the U-tube (9) and is fixed
It detains (11), second fixing buckle (11) is located at the underface of liquid case (3), and first fixing buckle (10) is located at U-tube (9)
The end of centre, the U-tube (9) is fixedly connected with liquid level cushion chamber (8), and the liquid level cushion chamber (8) passes through connecting tube (7)
It is connected with protective cover (6), has been left and right symmetrically arranged bracket (13) on the inner wall of the protective cover (6), two brackets (13)
It is upper to be fixedly installed with power supply (12) and signal processing module (15) respectively, it is fixedly installed in the inner bottom surface of the protective cover (6)
There is a nanometer fexible film pressure sensor (14), is provided with through-hole (16) on the bottom surface of the protective cover (6), the through-hole (16)
One end contacted with nanometer fexible film pressure sensor (14), the other end of the through-hole (16) is connect with connecting tube (7).
2. a kind of liquid level intelligent monitoring device according to claim 1, it is characterised in that: the liquid level cushion chamber
(8) and protective cover (6) is hollow structure.
3. a kind of liquid level intelligent monitoring device according to claim 1, it is characterised in that: the protective cover (6)
Lower surface is equal with the lower surface of liquid case (3).
4. a kind of liquid level intelligent monitoring device according to claim 1, it is characterised in that: the through-hole (16) is cut
Face shape be trapezium structure, the big opening end of the through-hole (16) upward, the osculum end of the through-hole (16) downward, the through-hole
(16) big opening end spatially matches with nanometer fexible film pressure sensor (14) to be contacted, through-hole (16) the osculum end
Diameter it is identical as the internal diameter of connecting tube (7).
5. a kind of liquid level intelligent monitoring device according to claim 1, it is characterised in that: the liquid case (3) is internal
Lower surface and the junction of U-tube (9) be fixedly installed filter screen (17).
6. a kind of liquid level intelligent monitoring device according to claim 1, it is characterised in that: the nanometer fexible film
Pressure sensor (14) by the first flexible substrate (23), flexible electrode layer (22), supporting layer (19), the second flexible substrate (20),
Pressure sensitive layer (21) and flexible package layer (18) composition, it is quick that the lower surface of second flexible substrate (20) is equipped with pressure
Feel layer (21), the upper surface of first flexible substrate (23) is equipped with flexible electrode layer (22), the pressure sensitive layer (21)
It is connect with flexible electrode layer (22) by the supporting layer (19) of two sides, the flexible package layer (18) is covered in the first flexible substrate
(23) with the edge of the second flexible substrate (20).
7. according to claim 1 with a kind of liquid level intelligent monitoring device described in 6, it is characterised in that: the nanometer is flexible
Diaphragm pressure sensor (14) is electrically connected by electrical output signal and signal processing module (15), the signal processing module
(15) it is connected respectively with display module (24) and control system (25), is respectively arranged with water gate control on the control system (25)
Module (26) and alarm module (27), the water gate control module (26) respectively with water inlet control switch (1) and out water management is opened
It closes (5) to be electrically connected, subscription parameters and state of a control setting module (28), the reservation is installed on the control system (25)
Parameter and state of a control setting module (28) are electrical connected with control system (25), the power supply (12) and nanometer flexible thin membrane pressure
Force snesor (14), signal processing module (15), display module (24) and control system (25) are separately connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811562795.XA CN109471462A (en) | 2018-12-20 | 2018-12-20 | A kind of liquid level intelligent monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811562795.XA CN109471462A (en) | 2018-12-20 | 2018-12-20 | A kind of liquid level intelligent monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109471462A true CN109471462A (en) | 2019-03-15 |
Family
ID=65675324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811562795.XA Pending CN109471462A (en) | 2018-12-20 | 2018-12-20 | A kind of liquid level intelligent monitoring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN109471462A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110887540A (en) * | 2019-11-22 | 2020-03-17 | 佛山金田申电子有限公司 | Continuous liquid level detecting device |
| CN112817344A (en) * | 2021-03-10 | 2021-05-18 | 合肥天鹅制冷科技有限公司 | Double-mechanism safety liquid level control device |
| CN113670406A (en) * | 2021-10-24 | 2021-11-19 | 胜利油田东强机电设备制造有限公司 | Liquid level transmitter capable of preventing probe from being blocked |
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| CN202533812U (en) * | 2011-12-25 | 2012-11-14 | 黄石职业技术学院 | A liquid level control system of a container |
| CN106953001A (en) * | 2017-03-24 | 2017-07-14 | 中山大学 | A kind of pliable pressure sensor based on carbon nano-tube film and photoresist and preparation method thereof |
| CN208985015U (en) * | 2018-12-20 | 2019-06-14 | 苏州能斯达电子科技有限公司 | A kind of liquid level intelligent monitoring device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201000351Y (en) * | 2006-11-29 | 2008-01-02 | 华南农业大学 | Pressure type liquid level instrument |
| CN202533812U (en) * | 2011-12-25 | 2012-11-14 | 黄石职业技术学院 | A liquid level control system of a container |
| CN106953001A (en) * | 2017-03-24 | 2017-07-14 | 中山大学 | A kind of pliable pressure sensor based on carbon nano-tube film and photoresist and preparation method thereof |
| CN208985015U (en) * | 2018-12-20 | 2019-06-14 | 苏州能斯达电子科技有限公司 | A kind of liquid level intelligent monitoring device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110887540A (en) * | 2019-11-22 | 2020-03-17 | 佛山金田申电子有限公司 | Continuous liquid level detecting device |
| CN112817344A (en) * | 2021-03-10 | 2021-05-18 | 合肥天鹅制冷科技有限公司 | Double-mechanism safety liquid level control device |
| CN113670406A (en) * | 2021-10-24 | 2021-11-19 | 胜利油田东强机电设备制造有限公司 | Liquid level transmitter capable of preventing probe from being blocked |
| CN113670406B (en) * | 2021-10-24 | 2022-01-28 | 胜利油田东强机电设备制造有限公司 | Liquid level transmitter capable of preventing probe from being blocked |
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Inventor after: Xiong Zuoping Inventor after: Zhou Zhen Inventor before: Xiong Zuoping Inventor before: Zhang Ting Inventor before: Zhou Zhen |