CN109764932A - Using the working method of the built-in liquid level emasuring device of differential pressure sensing device - Google Patents
Using the working method of the built-in liquid level emasuring device of differential pressure sensing device Download PDFInfo
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- CN109764932A CN109764932A CN201910109781.0A CN201910109781A CN109764932A CN 109764932 A CN109764932 A CN 109764932A CN 201910109781 A CN201910109781 A CN 201910109781A CN 109764932 A CN109764932 A CN 109764932A
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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
- G01F23/18—Indicating, recording or alarm devices actuated electrically
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The present invention relates to a kind of working methods of built-in liquid level emasuring device using differential pressure sensing device, the built-in liquid level emasuring device includes differential pressure sensing device, ventilation balance pipe, inlet, ventilation balance pipe and inlet are connect with the low pressure, input end of differential pressure sensing device and high voltage input terminal respectively, the bottom of the liquid in fluid reservoir to be measured is arranged in differential pressure sensing device, and the air inlet for balance pipe of ventilating is higher than the top surface of the liquid in fluid reservoir；The bottom wall of fluid reservoir is arranged in inlet；Differential pressure sensing device is connected by conducting wire with external power supply, controller；Electrology characteristic changes after the pressure difference that the high voltage input terminal and low pressure, input end of the differential pressure sensing device experience the gas pressure imported on liquid depth pressure and liquid level deforms, by the amplification to ultra-weak electronic signal, temperature-compensating interlock circuit be converted into can acquisition applications voltage or current signal, it is calculated through wire transmission to external controller, completes level gauging.
Description
Technical field
The present invention relates to technical field of liquid level measurement, specifically a kind of built-in level gauging using differential pressure sensing device
The working method of device.
Background technique
It is all tested using the test of contact float and absolute type electronic pressure transmitter in terms of level sensing.Contact
Formula float measuring accuracy and reliability be not high, and needs are unable to satisfy in precision measurement.
The test of absolute type electronic pressure transmitter, is such as moved to during vehicle transport under different height above sea level or closed
Under conditions of, it can not accurately test the height of liquid level, the inaccuracy that the pressure change of atmosphere or gas causes liquid level to test.
It is although there is the use case using two absolute pressure transducers, i.e., absolute using a gas pressure sensor and a liquid level
Pressure that formula electronic pressure transmitter is tested carries out the relatively accurate liquid level that arrives of difference calculating, but can be because
It is precision in system, failure cause cause inaccuracy or unreliable, and systematic comparison is complicated, higher cost, and service life is low etc.
Disadvantage.According to liquid internal pressure power formula: Ph=ρ gh+P0, ρ are the density of liquid, and g is acceleration of gravity, and h is that liquid level is arrived in liquid
The height of measurement point, P0 are the gas pressure of liquid level, and Ph is the pressure of liquid internal；Fluid density and gravity add under general condition
Speed is constant, then liquid inner height and pressure difference (Ph-P0) are directly proportional.
The pressure for having an atmospheric pressure on general liquid level is about 100kPa, and water base or organic liquid density and gravity add
In the case that speed is certain the depth of liquid at 1 meter also with regard to 10kPa or so, when the corresponding pressure of accurate measurement liquid depth
When must remove the pressure of liquid level could be directly proportional with liquid level.
Chinese patent CN200710199215.0, built-in pressure sampling method for differential pressure levelmeter, which disclose one kind, can overcome appearance
The liquid-level detecting method for having steam or medium temperature variation to have an impact measurement in device, it includes at least fluid reservoir, differential pressure type
Liquidometer, positive pressure guiding pipe, negative pressure guiding pipe, positive pressure guiding pipe and negative pressure guiding pipe respectively with the positive terminal of differential pressure type level gauge
The connection of (high voltage input terminal) and negative phase end (low pressure, input end), its negative pressure guiding pipe vertical section are located in container, negative impulse
Filled liquid in container is previously implanted in pipe.In practical applications, medium temperature is that often great changes will take place, influences to survey
Accuracy of measurement；A bit of horizontal pressure guiding pipe of the device when in use outside container needs heat tracing, and when use is more troublesome.
Summary of the invention
Built in that technical problem to be solved by the invention is to provide a kind of structures is simple, easy to maintain, measurement accuracy is high
Formula liquid level emasuring device and its working method.
To solve the above-mentioned problems, the present invention provides a kind of built-in liquid level emasuring device, the built-in liquid level is surveyed
Amount device includes differential pressure sensing device, ventilation balance pipe, inlet, ventilate balance pipe and inlet respectively with differential pressure sensing device
Low pressure, input end connected with high voltage input terminal, the bottom of the liquid in fluid reservoir to be measured is arranged in the differential pressure sensing device
Portion, the air inlet for balance pipe of ventilating is higher than the top surface of the liquid in fluid reservoir, for the air on testing liquid surface to be transmitted to
The low pressure, input end of differential pressure sensing device；The bottom wall of fluid reservoir is arranged in the inlet, so that testing liquid enters differential pressure biography
The high voltage input terminal of induction device；The differential pressure sensing device is connected by conducting wire with external power supply, controller, for differential pressure
Sensing device provides power supply and completes data calculating；The high voltage input terminal and low pressure, input end of the differential pressure sensing device experience liquid
Electrology characteristic changes after the pressure difference deformation of the gas pressure imported in body depth pressure and liquid level, by faint telecommunications
Number amplification, temperature-compensating interlock circuit be converted into can acquisition applications voltage or current signal, through wire transmission to external
Controller is calculated, and level gauging is completed.
The differential pressure sensing device includes circuit board and differential pressure pick-up chip, and the center of the circuit board is equipped with through-hole, should
Circuit board is connected by conducting wire with external power supply, controller, and differential pressure pick-up chip is fixedly installed in the lower section of the circuit board, should
Differential pressure pick-up chip has corresponding the upper side and lower side, and upside is the low pressure, input end of differential pressure sensing device, described logical
The through-hole that gas balance pipe passes through the circuit board is connected with the low pressure, input end, and the downside of the differential pressure pick-up chip is that high pressure is defeated
Enter end to be connected with inlet, so that filtered testing liquid is directly entered the high voltage input terminal of differential pressure sensing device.
Further, the lower section of the differential pressure pick-up chip is equipped with convoluted diaphragm, which is welded on shell；Institute
State and form seal cavity between circuit board and convoluted diaphragm, in the seal cavity full of can conducting pressure silicone oil, which passes
The downside of sensor chip is in contact with silicone oil；High voltage input terminal of the downside of the convoluted diaphragm as the differential pressure sensing device,
It is connected with inlet, liquid is transmitted to the downside of the differential pressure pick-up chip by convoluted diaphragm, silicone oil.
Further, the differential pressure pick-up chip is mechanical pressure sensors chip, resilient membrane type pressure sensor
Chip, semiconductor silicon pressure type sensor chip, ceramic capacitive pressure sensor chip, diaphragm capacitance pressure transducer, core
At least one of piece, piezoelectric ceramics formula pressure sensor chip.
Further, mounting base is equipped in the fluid reservoir, for fixing the differential pressure sensing device.
Further, the mounting base is arranged in above the bottom wall of fluid reservoir by mounting bracket, the mounting bracket and institute
It states liquid top surface to be vertically arranged, the conducting wire, ventilation balance pipe are fixed on the mounting bracket, and are easily installed.
Further, the inlet is equipped with strainer, prevents foreign matters from being blocked inlet, influences measurement result.
Further, the air inlet of the ventilation balance pipe is equipped with can only prevent fluid molecule entrance by gas molecule
Filtration film device prevents from entering liquid in ventilation balance pipe, influences measurement result.
The working method of above-mentioned built-in liquid level emasuring device, includes the following steps:
A, one end of conducting wire, balance pipe of ventilating is distinguished using the circuit board of sealant and differential pressure sensing device, low pressure, input end
Sealing is connected, and the other end of conducting wire is connected with external power supply, controller；By the high input voltage of inlet and differential pressure sensing device
End is connected.
B, differential pressure sensing device is fixed in mounting base, and mounting base and mounting bracket is fixedly linked, the conducting wire,
Ventilation balance pipe is equally fixed on the mounting bracket.
C, the mounting base merging after fixation is filled in the fluid reservoir of liquid to be detected, the other end conduct for balance pipe of ventilating
Air inlet is higher than the top surface setting of the liquid in fluid reservoir；Ventilation balance pipe is led the gas pressure of ullage by air inlet
Enter the low pressure, input end on the upside of the differential pressure sensing device, the liquid depth pressure of liquid storage pot bottom is imported by the difference by inlet
The high voltage input terminal on the downside of sensing device is pressed, the differential pressure pick-up chip of the differential pressure sensing device experiences high voltage input terminal and low
Deformation occurs after the pressure difference of pressure input terminal, and electrology characteristic changes, ultra-weak electronic signal is amplified by circuit board,
Be converted into after temperature-compensating can acquisition applications voltage or current signal, calculated through wire transmission to external controller,
Complete level gauging.
The technical effect of invention: (1) of the invention built-in liquid level emasuring device, compared with the existing technology, differential pressure sensing
The liquid internal in fluid reservoir is arranged in device, is in differential pressure sensing device in fluid to be measured, avoids because temperature difference produces
The defect of raw error, measurement accuracy greatly improve；(2) air inlet of ventilation balance pipe is equipped with and can only be prevented by gas molecule
The filtration film device that fluid molecule enters preferably protects and not directly enters liquid, or because liquid in ventilation balance pipe
Evaporation is cooling to lead to collected liquid in ventilation balance pipe, so that ventilation balance pipe is not entered liquid and ensures measurement accuracy；(3) pass through
Differential pressure sensing device is arranged in fluid reservoir for mounting base and mounting bracket, easy for installation, applied widely.
Detailed description of the invention
Invention is further described in detail with reference to the accompanying drawings of the specification:
Fig. 1 is the structural schematic diagram of the built-in liquid level emasuring device of the embodiment of the present invention 1；
Fig. 2 is the partial enlarged view of a-quadrant in Fig. 1；
Fig. 3 is the structural schematic diagram of the differential pressure sensing device of the embodiment of the present invention 2.
In figure: fluid reservoir 1, liquid 2, liquid expansion space 3, differential pressure sensing device 4, low pressure, input end 41, high input voltage
End 42, strainer 43, shell 44, sealant 45, circuit board 46, differential pressure pick-up chip 47, silicone oil 48, convoluted diaphragm 49, ventilation
Balance pipe 5, conducting wire 6, mounting base 7, mounting bracket 8, inlet 9.
Specific embodiment
Embodiment 1
As shown in Figure 1 to Figure 2, the built-in liquid level emasuring device of the present embodiment, including fluid reservoir 1 and differential pressure sensing device 4, storage
The liquid 2(to be monitored that flow container 1 is provided with a certain amount of known density can be gasoline, diesel oil, water, alcohol etc.), and in fluid reservoir 1
It is reserved with certain liquid expansion space 3, differential pressure sensing device 4 includes circuit board 46, and the center of the circuit board 46 is equipped with through-hole,
The circuit board 46 is connected by conducting wire 6 with external power supply, controller, and differential pressure pick-up is fixedly installed in the lower section of the circuit board 46
Mechanical pressure sensors chip, resilient membrane type pressure sensor chip, semiconductor silicon pressure type sensing can be selected in chip 47(
Device chip, ceramic capacitive pressure sensor chip, diaphragm capacitance pressure transducer, chip, piezoelectric ceramics formula pressure sensor
Chip etc. is used as differential pressure pick-up chip), which has corresponding the upper side and lower side, upside conduct
The low pressure, input end 41 of differential pressure sensing device, the through-hole that ventilation balance pipe 5 passes through circuit board 46 are connected with the low pressure, input end 41,
The downside of the differential pressure pick-up chip 47 is that high voltage input terminal 42 is connected with inlet tube, the feed liquor as the differential pressure sensing device 4
Mouth 9.
Differential pressure sensing device 4 is fixed at the bottom of the liquid 2 in fluid reservoir 1, differential pressure sensing device by mounting base 7
4 low pressure, input end 41 is connected with ventilation balance pipe 5, and the air inlet of the ventilation balance pipe 5 is higher than the liquid 2 in fluid reservoir 1
Top surface, for transmitting the air pressure on testing liquid surface；The air inlet is equipped with filtration film device, which can only lead to
It crosses gas molecule and fluid molecule is prevented to enter, prevent from entering liquid in ventilation balance pipe.
Inlet 9 is equipped with strainer 43, prevents foreign matters from being blocked inlet 9；Conducting wire 6 by power supply line, ground wire and signal line group at,
Differential pressure sensing device 4 is connected by conducting wire 6 with external power supply, controller；Mounting base 7 passes through the mounting bracket 8 being vertically arranged
It is fixed, conducting wire 6, ventilation balance pipe 5 are fixed in mounting bracket 8.
Embodiment 2
On the basis of the above embodiments, the present embodiment the difference from embodiment 1 is that, differential pressure sensing device 4 include further include
Tubular shell 44, circuit board 46, which welds, is mounted on the middle part of tubular shell 44, the circuit board 46 and conducting wire 6, ventilation balance pipe 5 it
Between be sealed using sealant 45；The lower section of differential pressure pick-up chip 47 is equipped with convoluted diaphragm 49, the convoluted diaphragm 49 welding
On shell 44；Seal cavity is formed between circuit board 46 and convoluted diaphragm 49, full of can conducting pressure in the seal cavity
Silicone oil 48；The downside of the differential pressure pick-up chip 47 is in contact with silicone oil 48；The downside of convoluted diaphragm 49 is sensed as the differential pressure
The high voltage input terminal of device is connected with inlet 9；Liquid is transmitted to the high input voltage of 49 downside of convoluted diaphragm by inlet 9
End 42, the downside of the differential pressure pick-up chip 47 is transmitted to by convoluted diaphragm 49, silicone oil 48.
The working method of above-mentioned built-in liquid level emasuring device, includes the following steps:
A, one end of conducting wire 6, balance pipe 5 of ventilating is inputted using the circuit board 46 of sealant 45 and differential pressure sensing device 4, low pressure
Sealing is connected respectively at end 41, and the other end of conducting wire 6 is connected with external power supply, controller；Make inlet 9 and differential pressure sensing device
4 high voltage input terminal 42 is connected.
B, differential pressure sensing device 4 is fixed in mounting base 7, and mounting base 7 and mounting bracket 8 is fixedly linked, conducting wire
6, ventilation balance pipe 5 is equally fixed in mounting bracket 8.
C, the mounting base 7 after fixation is placed in the fluid reservoir 1 for filling liquid to be detected, the other end for balance pipe 5 of ventilating
It is higher than the top surface setting of the liquid 2 in fluid reservoir 1 as air inlet；Balance pipe 5 of ventilating passes through air inlet for the gas of ullage
Body pressure imports the low pressure, input end 41 of 4 upside of differential pressure sensing device, by inlet 9 that the liquid of 1 bottom of fluid reservoir is deep
Degree pressure imports the high voltage input terminal 42 of 4 downside of differential pressure sensing device, the differential pressure pick-up chip 47 of the differential pressure sensing device 4
Experience after high voltage input terminal 42 and the pressure difference of low pressure, input end 41 that deformation occurs, electrology characteristic changes, and passes through electricity
Road plate 46 amplifies ultra-weak electronic signal, be converted into after temperature-compensating can acquisition applications voltage or current signal, through conducting wire 6
It is transmitted to external controller to be calculated, completes level gauging.
The liquid internal in fluid reservoir is arranged in built-in liquid level emasuring device of the invention, differential pressure sensing device, is poor
Pressure sensing device is in fluid to be measured, is avoided because temperature difference generates the defect of error, measurement accuracy greatly improves；It can be with
It is widely applied in the level gaugings such as fuel tank, engine water tank liquid level, the oil truck of vehicle, or heating, non-heated opens
Put or closed tank body in, the real time monitoring to liquid level may be implemented.
Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and is not to of the invention
The restriction of embodiment.For those of ordinary skill in the art, it can also be made on the basis of the above description
Its various forms of variation or variation.There is no necessity and possibility to exhaust all the enbodiments.And these belong to this hair
The obvious changes or variations that bright spirit is extended out are still in the protection scope of this invention.
Claims (8)
1. a kind of working method of built-in liquid level emasuring device, the liquid level emasuring device include: fluid reservoir to be measured (1),
Differential pressure sensing device (4), ventilation balance pipe (5), inlet (9), ventilate balance pipe (5) and inlet (9) is passed with differential pressure respectively
The low pressure, input end (41) of induction device (4) is connected with high voltage input terminal (42), which is characterized in that the differential pressure sensing device (4)
The bottom for the liquid (2) being arranged in fluid reservoir (1), the air inlet of ventilation balance pipe (5) are higher than the liquid in fluid reservoir (1)
(2) top surface；The bottom wall in fluid reservoir (1) is arranged in the inlet (9), so that testing liquid enters differential pressure sensing device (4)
High voltage input terminal (42)；The differential pressure sensing device (4) is connected by conducting wire (6) with external power supply, controller；
The differential pressure sensing device (4) includes circuit board (46) and differential pressure pick-up chip (47), the center of the circuit board (46)
Equipped with through-hole, which is connected by conducting wire (6) with external power supply, controller, and the lower section of the circuit board (46) is solid
Surely differential pressure pick-up chip (47) are set, which has corresponding the upper side and lower side, and upside is
The low pressure, input end (41) of differential pressure sensing device (4), ventilation balance pipe (5) pass through the through-hole of the circuit board (46) and are somebody's turn to do
Low pressure, input end (41) is connected, and the downside of the differential pressure pick-up chip (47) is that high voltage input terminal (42) are connected with inlet (9),
So that testing liquid (2) enters the high voltage input terminal (42) of differential pressure sensing device (4)；
The mounting base (7) for fixing the differential pressure sensing device (4) is equipped in the fluid reservoir (1), the mounting base (7) is logical
Mounting bracket (8) are crossed to be arranged above the bottom wall of fluid reservoir (1)；
The mounting bracket (8) is vertically arranged with the liquid (2) top surface, and the conducting wire (6), ventilation balance pipe (5) are fixed on
In mounting bracket (8)；
The working method, includes the following steps:
A, one end of conducting wire (6), ventilation balance pipe (5) is used to the circuit board of sealant (45) and differential pressure sensing device (4)
(46), low pressure, input end (41) seals respectively is connected, and the other end of conducting wire (6) is connected with external power supply, controller；By feed liquor
Mouth (9) is connected with the high voltage input terminal (42) of differential pressure sensing device (4)；
B, differential pressure sensing device (4) is fixed in mounting base (7), and mounting base (7) and mounting bracket (8) is fixedly linked,
The conducting wire (6), ventilation balance pipe (5) are equally fixed on mounting bracket (8)；
C, mounting base (7) merging after fixation is filled in the fluid reservoir (1) of liquid to be detected (2), the another of balance pipe (5) of ventilating
One end is higher than the top surface setting of the liquid (2) in fluid reservoir (1) as air inlet；Ventilation balance pipe (5) passes through air inlet for liquid
Gas pressure above face imports the low pressure, input end (41) on the upside of the differential pressure sensing device (4), by inlet (9) by liquid storage
The liquid depth pressure of tank (1) bottom imports the high voltage input terminal (42) on the downside of the differential pressure sensing device (4), differential pressure sensing dress
Set (4) differential pressure pick-up chip (47) experience high voltage input terminal (42) and the pressure difference of low pressure, input end (41) after shape occurs
Become, electrology characteristic changes, amplified by circuit board (46) to ultra-weak electronic signal, is converted into and can adopt after temperature-compensating
The voltage or current signal for collecting application, are transmitted to external controller through conducting wire (6) and are calculated, and complete level gauging.
2. working method according to claim 1, which is characterized in that the air inlet of ventilation balance pipe (5) is equipped with only
The filtration film device that fluid molecule can be prevented to enter by gas molecule.
3. working method according to claim 1, which is characterized in that the air inlet of the inlet tube (9) is equipped with strainer
(43).
4. working method according to claim 1, which is characterized in that the differential pressure pick-up chip is mechanical compression biography
Sensor chip.
5. working method according to claim 1, which is characterized in that the differential pressure pick-up chip is resilient membrane type pressure
Sensor chip.
6. working method according to claim 1, which is characterized in that the differential pressure pick-up chip is semiconductor silicon pressure
Formula sensor chip.
7. working method according to claim 1, which is characterized in that the differential pressure pick-up chip is ceramic capacitor-type pressure
Sensor chip.
8. working method according to claim 1, which is characterized in that the differential pressure pick-up chip is diaphragm condenser type pressure
Sensor chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910109781.0A CN109764932B (en) | 2016-01-15 | 2016-01-15 | Working method of built-in liquid level measuring device adopting differential pressure sensing device |
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| CN201910109781.0A CN109764932B (en) | 2016-01-15 | 2016-01-15 | Working method of built-in liquid level measuring device adopting differential pressure sensing device |
| CN201610028612.0A CN105486376B (en) | 2016-01-15 | 2016-01-15 | A kind of built-in liquid level emasuring device and its working method |
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| CN201910109781.0A Active CN109764932B (en) | 2016-01-15 | 2016-01-15 | Working method of built-in liquid level measuring device adopting differential pressure sensing device |
| CN201910109782.5A Active CN109764933B (en) | 2016-01-15 | 2016-01-15 | Differential pressure sensing device and liquid level measuring device formed by same |
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| CN113091994B (en) * | 2021-04-12 | 2021-11-09 | 成都皓瀚完井岩电科技有限公司 | High static pressure differential pressure transducer |
| CN117963370B (en) * | 2024-03-29 | 2024-06-18 | 四川惠科达仪表制造有限公司 | Multifunctional liquid level meter |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2141075Y (en) * | 1992-10-27 | 1993-08-25 | 徐宏宇 | Static-pressure level indicator for sealed containers |
| US5261276A (en) * | 1992-05-04 | 1993-11-16 | Henry Gifford | Fuel oil monitor system and method |
| CN101206133A (en) * | 2007-12-14 | 2008-06-25 | 西安长庆科技工程有限责任公司 | Built-in pressure sampling method for differential pressure levelmeter |
| DE102007029147A1 (en) * | 2007-06-25 | 2009-01-08 | Robert Bosch Gmbh | Pressure sensor for detecting liquid level in tank of e.g. lorry, has pressure-sensitive region surrounded by housing that has adjustment hole producing hydraulic connection between interior of housing and tank |
| CN202994230U (en) * | 2012-11-30 | 2013-06-12 | 上海麦驰软件科技有限公司 | Dustproof and waterproof device of gaseous mass flow sensor |
| CN104154966A (en) * | 2014-07-25 | 2014-11-19 | 武汉飞恩微电子有限公司 | Liquid level sensor based on pressure detection |
| CN204142322U (en) * | 2014-07-25 | 2015-02-04 | 赵云华 | A kind of measurement mechanism of liquid level height |
| CN204594536U (en) * | 2015-04-29 | 2015-08-26 | 河海大学常州校区 | A kind of electronic liquid level gauge |
| CN204788564U (en) * | 2015-05-26 | 2015-11-18 | 南通世发船舶机械有限公司 | Digital level gauge |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2209794Y (en) * | 1994-10-24 | 1995-10-11 | 张福缘 | Plug-in type liquid level sensor |
| CN2223485Y (en) * | 1995-05-25 | 1996-03-27 | 段祥照 | Liquid level sensor for pressure container |
| CN1198527A (en) * | 1997-05-07 | 1998-11-11 | 苏正复 | Micro-difference pressure taking method for measuring liquid level |
| RU2160432C1 (en) * | 2000-02-22 | 2000-12-10 | Зао "Тк Сибур Нн" | Gear to determine mass of oil product in closed vessel under pressure, predominantly in container-tank |
| CN2559970Y (en) * | 2002-08-27 | 2003-07-09 | 段祥照 | Electronic liquid level gauge |
| EP1431722B1 (en) * | 2002-12-17 | 2010-10-13 | Robert Bosch Gmbh | Differential pressure sensor for measuring the liquid level in a container |
| JP2007322292A (en) * | 2006-06-02 | 2007-12-13 | Hitachi High-Tech Control Systems Corp | Liquid level measuring method and differential pressure transmitter |
| CN100412516C (en) * | 2006-08-23 | 2008-08-20 | 潍坊市阿波罗散热器制造有限公司 | Differential pressure type liquid level detector |
| CN201107083Y (en) * | 2007-10-19 | 2008-08-27 | 江苏远望仪器有限公司 | Contrast type liquid level measuring device |
| CN102252731B (en) * | 2011-05-09 | 2012-12-26 | 中昊晨光化工研究院 | Device and method for measuring interface of medium in container |
| CN205317300U (en) * | 2016-01-15 | 2016-06-15 | 庞极洲 | Built -in liquid level measurement device |
-
2016
- 2016-01-15 CN CN201610028612.0A patent/CN105486376B/en active Active
- 2016-01-15 CN CN201910109781.0A patent/CN109764932B/en active Active
- 2016-01-15 CN CN201910109782.5A patent/CN109764933B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5261276A (en) * | 1992-05-04 | 1993-11-16 | Henry Gifford | Fuel oil monitor system and method |
| CN2141075Y (en) * | 1992-10-27 | 1993-08-25 | 徐宏宇 | Static-pressure level indicator for sealed containers |
| DE102007029147A1 (en) * | 2007-06-25 | 2009-01-08 | Robert Bosch Gmbh | Pressure sensor for detecting liquid level in tank of e.g. lorry, has pressure-sensitive region surrounded by housing that has adjustment hole producing hydraulic connection between interior of housing and tank |
| CN101206133A (en) * | 2007-12-14 | 2008-06-25 | 西安长庆科技工程有限责任公司 | Built-in pressure sampling method for differential pressure levelmeter |
| CN202994230U (en) * | 2012-11-30 | 2013-06-12 | 上海麦驰软件科技有限公司 | Dustproof and waterproof device of gaseous mass flow sensor |
| CN104154966A (en) * | 2014-07-25 | 2014-11-19 | 武汉飞恩微电子有限公司 | Liquid level sensor based on pressure detection |
| CN204142322U (en) * | 2014-07-25 | 2015-02-04 | 赵云华 | A kind of measurement mechanism of liquid level height |
| CN204594536U (en) * | 2015-04-29 | 2015-08-26 | 河海大学常州校区 | A kind of electronic liquid level gauge |
| CN204788564U (en) * | 2015-05-26 | 2015-11-18 | 南通世发船舶机械有限公司 | Digital level gauge |
Non-Patent Citations (3)
| Title |
|---|
| 张建宜: "差压式液位计在密闭容器上应用与改进", 《中国新技术新产品》 * |
| 徐红明等主编: "《轮机自动控制技术》", 《轮机自动控制技术》 * |
| 陈磊: "电站汽包液位控制的温压修正", 《石油化工自动化》 * |
Also Published As
| Publication number | Publication date |
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| CN109764932B (en) | 2020-12-08 |
| CN105486376B (en) | 2019-01-29 |
| CN109764933B (en) | 2020-11-27 |
| CN109764933A (en) | 2019-05-17 |
| CN105486376A (en) | 2016-04-13 |
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