CN105806443B - Liquid level measuring system of shaking test storage tank - Google Patents
Liquid level measuring system of shaking test storage tank Download PDFInfo
- Publication number
- CN105806443B CN105806443B CN201410843876.2A CN201410843876A CN105806443B CN 105806443 B CN105806443 B CN 105806443B CN 201410843876 A CN201410843876 A CN 201410843876A CN 105806443 B CN105806443 B CN 105806443B
- Authority
- CN
- China
- Prior art keywords
- liquid level
- pipeline
- storage tank
- test
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 180
- 238000012360 testing method Methods 0.000 title claims abstract description 134
- 239000011521 glass Substances 0.000 claims abstract description 46
- 238000005259 measurement Methods 0.000 claims abstract description 46
- 239000003380 propellant Substances 0.000 claims abstract description 18
- 238000004088 simulation Methods 0.000 claims abstract description 16
- 238000012806 monitoring device Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 5
- 230000003313 weakening effect Effects 0.000 claims description 2
- 238000000691 measurement method Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 description 10
- 238000007599 discharging Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 229920005372 Plexiglas® Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a liquid level measuring system of a shaking test storage tank, wherein a first branch pipeline is connected with a filling and draining unit and the bottom of the test storage tank, a second branch pipeline is connected with the bottommost end of the test storage tank and a communicating pipeline, the communicating pipeline is connected with the second branch pipeline and a liquid level measurement organic glass pipe, an air outlet at the upper end of the test storage tank is communicated with an upper port of the liquid level measurement organic glass pipe or both the air outlet and the upper port of the liquid level measurement organic glass pipe are communicated with the atmosphere, a first clamp is arranged between the filling and draining unit and the test storage tank, and a second clamp is arranged between the second branch pipeline and the communicating pipeline. The invention utilizes the principle of a communicating vessel, and accurately measures the liquid level height in the storage tank through the liquid level measuring organic glass tube, thereby realizing the accurate filling of each liquid level of the propellant simulation liquid in the test storage tank; the clamp connection pipeline capable of being disassembled and assembled quickly is used, so that the pipeline and the test storage tank can be disassembled and assembled quickly, the state conversion efficiency is greatly improved, and the negative influence of the subsidiary pipeline on the shaking test result is reduced.
Description
Technical Field
The invention relates to the technical field of liquid shaking tests, in particular to a liquid level measuring system of a shaking test storage tank and a using method thereof.
Background
As liquid fuel aircraft move to high speeds and high altitudes, the specific gravity of aircraft fuel in terms of total weight is increasing. Often, in a range of large aircraft such as launch vehicles, intercontinental missiles, satellites or airships, the weight of fuel can be as much as 90% of the total weight; the influence of sloshing of the liquid fuel on the flight performance of the aircraft, in particular on the stability and maneuverability of the aircraft, is therefore not negligible.
The aircraft can generate strong vibration during the flight process, so that the liquid fuel can generate shaking in the storage tank, and the shaking often has lower self-vibration frequency, is usually easier to couple with a control system than bending vibration, and has greater potential danger on the stability and the handling performance of the aircraft. Therefore, the study of the sloshing characteristic and the method of suppressing the sloshing is a very important issue in the design of the liquid fuel aircraft.
The tank liquid shaking test method can obtain shaking dynamics parameters such as shaking frequency, damping, shaking quality and the like. The liquid level of the liquid fuel in the storage tank of the liquid fuel aircraft is continuously reduced along with the consumption of the fuel in the flying process, and the corresponding shaking dynamics parameters are changed along with the change of the liquid level, so that the liquid shaking test of the storage tank needs to be carried out in tests according to different liquid level states. In order to obtain the swing dynamics parameters under different flight states, a plurality of liquid levels need to be designed in a liquid swing test, and the change rule can be carefully obtained by setting more liquid levels due to the fact that the swing dynamics parameters change violently at special positions (such as the position of an anti-swing plate). Therefore, the method has important practical significance for the tank liquid shaking test by improving the accuracy of liquid propellant liquid level measurement and the efficiency of state conversion.
With the increasing diameter of the fuel storage tank of the aircraft, the small liquid level deviation of the storage tank filled with propellant simulation liquid in the test can cause larger liquid quality change, so that the shaking dynamics parameters can be directly influenced, and the liquid level measurement precision of the large-scale test storage tank needs to be further improved. In the prior art, a transparent part of a storage tank is generally utilized, and liquid level measurement is directly carried out by using a ruler; the pipelines are connected through a thread structure, and the disassembly process is very complicated. The main problems of liquid level filling, measuring and discharging in the existing tank liquid shaking test are as follows: firstly, the accuracy of a large test storage box adopting a traditional measuring method is usually large in error and needs to be improved; secondly, after the liquid management device is additionally arranged at the bottom in the storage tank, the liquid propellant simulates liquid to be filled, drained and measured inconveniently; thirdly, the pipeline is complex to disassemble and assemble, the consumed time is long, and the efficiency of state conversion is reduced. In order to solve the technical problem, the invention designs a liquid level measuring system of a shaking test storage tank.
Disclosure of Invention
The invention aims to provide a liquid level measuring system of a shaking test storage tank, which can ensure the accurate filling of each liquid level of propellant simulation liquid in the test storage tank and improve the liquid level measuring precision of a large-scale test storage tank; can realize the quick assembly disassembly of pipeline, improve the efficiency of state transition, reduce the negative effects of subsidiary pipeline to rocking test result production simultaneously.
The invention relates to a liquid level measuring system of a shaking test storage tank, which comprises a filling and draining unit, a test storage tank, a liquid level measuring organic glass pipe with a fixed scale, a first branch pipeline, a second branch pipeline and a communicating pipeline.
And an exhaust port at the upper end of the test storage tank is communicated with an upper port of the liquid level measurement organic glass pipe or both are communicated with the atmosphere.
The first branch pipeline comprises a first pipeline, a second pipeline and a first stop valve, the filling and draining unit is connected with the first pipeline, the bottom of the test storage tank is connected with the second pipeline, and the first stop valve is installed between the first pipeline and the second pipeline.
The second branch pipeline comprises a third pipeline and a second stop valve, and the third pipeline is connected with the bottommost end of the test storage tank and the second stop valve.
The communicating pipeline comprises a fourth pipeline, a third stop valve and a fifth pipeline, the fourth pipeline is connected with a second stop valve of the second branch pipeline, the fifth pipeline is connected with a lower port of the liquid level measurement organic glass pipe, and the third stop valve is installed between the fourth pipeline and the fifth pipeline.
The liquid level measuring system further comprises a first hoop and a second hoop, wherein the first hoop is installed at the connecting end of the first stop valve and the first pipeline, and the second hoop is installed at the connecting end of the second stop valve and the fourth pipeline of the communication pipeline.
The liquid level measuring system also comprises a video monitoring unit which consists of a test storage tank monitoring device and a liquid level measuring organic glass tube monitoring device.
The liquid level measuring system also comprises a lower end fixing device, an upper end fixing device and a dust cover which are respectively arranged at the lower end, the upper end and the upper port of the liquid level measuring organic glass tube.
The liquid level measuring system comprises the following measuring method:
step 4.1, keeping the second stop valve and the third stop valve in an open state, and ensuring that an exhaust port at the upper end of the test storage tank and a pipe orifice at the upper end of the liquid level measurement organic glass pipe are communicated with the atmosphere;
step 4.2, starting a filling and draining unit and opening a first stop valve, filling propellant simulation liquid into the test storage tank, and observing the liquid level change conditions of the test storage tank and the liquid level measurement organic glass tube through a test storage tank monitoring device and a liquid level measurement organic glass tube monitoring device;
step 4.3, when the height of the liquid level is close to the designated scale, controlling the first stop valve to slow down the filling flow, and performing accurate filling;
step 4.4, closing the first stop valve to stop filling when the liquid level reaches the target actual height, keeping the liquid level stable and marking the height of the liquid level;
The invention relates to a liquid level measuring system of a shaking test storage tank, which utilizes the principle of a communicating vessel and accurately measures the liquid level height in the storage tank through a liquid level measuring organic glass tube, realizes the accurate filling of each liquid level of propellant simulation liquid in the test storage tank, and can effectively reduce the measuring error especially for a large-scale test storage tank.
The invention uses the clamp which can be quickly disassembled and assembled to connect the pipeline, so that the pipeline and the test storage tank can be quickly disassembled and assembled, the state conversion efficiency is greatly improved, the manual strength is reduced, and the negative influence of the auxiliary pipeline on the shaking test result is reduced.
The invention also designs a video monitoring unit, can synchronously observe the height change of the liquid level in the organic glass tube and the storage tank for liquid level measurement in real time through the monitoring device, can observe the amplitude and the vibration form of the liquid level in the storage tank in the shaking process of the storage tank, and can also transmit the monitoring data to a computer for recording or processing, thereby further perfecting the liquid level measurement system of the shaking test storage tank.
Drawings
Fig. 1 is a schematic diagram of the association of six functional units.
FIG. 2 is a schematic view of the test apparatus.
The device comprises a shaking unit 1, a control acquisition unit 2, a video monitoring unit 3, a test storage tank unit 4, a test storage tank unit 5, a filling and draining unit 6, a liquid level measuring unit 7, a liquid management device 8, a dust cover 9, an upper end fixing device 10, a liquid level measuring organic glass pipe 11, a scale 12, a lower end fixing device 13, a test storage tank 14, a first pipeline 15, a second pipeline 16, a third pipeline 17, a fourth pipeline 18, a fifth pipeline 19, a first stop valve 20, a second stop valve 21, a third stop valve 22, a test storage tank monitoring device 23 and a liquid level measuring organic glass pipe monitoring device.
Detailed Description
The invention is further described below with reference to the figures and examples.
The invention relates to a sloshing test storage tank liquid level measurement system applied to a storage tank liquid sloshing test, wherein a test device consists of six functional units, and the six functional units are as follows: the device comprises a shaking unit 1, a control acquisition unit 2, a video monitoring unit 3, a test storage tank unit 4, a filling and draining unit 5 and a liquid level measuring unit 6. The working principle is as shown in figure 1, the control acquisition unit 2 controls the shaking unit 1 to generate shaking force meeting the test conditions, and acquires actual shaking test data parameters of the shaking unit 1, the shaking unit 1 enables the test storage tank unit 4 to correspondingly shake, the filling and draining unit 5 fills or drains propellant simulation liquid for the test storage tank unit 4, the liquid level measurement unit 6 is used for accurately measuring the liquid level height in the test storage tank unit 4, and the video monitoring unit 3 is used for observing the liquid level height changes in the test storage tank unit 4 and the liquid level measurement unit 6 in real time.
The testing device related to the liquid level measuring system is shown in figure 2:
the test storage tank unit 4 consists of a test storage tank 13, a liquid management device 7 and an anti-shaking device, wherein the liquid management device 7 is arranged at the bottom of the test storage tank and used for controlling liquid shaking, and the anti-shaking device is arranged near the liquid level height which is most likely to generate large shaking amplitude in the test storage tank and used for weakening liquid level shaking;
the liquid level measuring unit 6 consists of a communicating pipeline, a lower end fixing device 12, a liquid level measuring organic glass tube 10 with a fixed scale 11, an upper end fixing device 9 and a dust cover 8, wherein the liquid level measuring organic glass tube 10 is installed on the lower end fixing device 12, the lower end fixing device 12 plays a role in supporting, sealing and fixing the liquid level measuring organic glass tube 10, the upper end fixing device 9 plays a role in fixing the liquid level measuring organic glass tube 10 and can perform micro-adjustment on levelness and verticality of the liquid level measuring organic glass tube 10, and the dust cover 8 is installed at an upper port of the liquid level measuring organic glass tube 10;
the video monitoring unit 3 consists of two monitoring devices, namely a test storage tank monitoring device 22 and a liquid level measurement organic glass tube monitoring device 23, and is used for synchronously observing the liquid level height change of the test storage tank 13 and the liquid level measurement organic glass tube 10 in real time.
The liquid level measuring system of the storage tank for the shaking test comprises a filling and draining unit 5, a test storage tank 13, a liquid level measuring organic glass pipe 10 with a fixed scale 11, a first branch pipeline, a second branch pipeline and a communicating pipeline, wherein the filling and draining unit is arranged on the test storage tank, and the communicating pipeline is arranged on the first branch pipeline.
The liquid level measuring system adopts a communicating vessel principle, when the system works, an exhaust port at the upper end of the test storage tank 13 is ensured to be communicated with an upper port of the liquid level measuring organic glass tube 10 or both the exhaust port and the upper port are communicated with the atmosphere, and the height value of the liquid level is read according to a scale 11 of the liquid level measuring organic glass tube 10. If the exhaust port at the upper end of the test storage tank 13 is communicated with the upper port of the liquid level measurement organic glass tube 10, the liquid level height measurement of the pressurization storage tank can be realized. In this embodiment, the top of the test tank 13 is vented to atmosphere, and the upper port of the level measuring plexiglass tube 10 is kept vented to atmosphere.
The first branch pipeline is connected with the bottom of the filling and discharging unit 5 and the test storage tank 13 and is used for filling and discharging propellant simulation liquid, and the first branch pipeline comprises a first pipeline 14, a second pipeline 15, a first stop valve 19 and a first clamp; wherein, the filling and draining system unit 5 is connected with a first pipeline 14, the bottom of the test tank 13 is connected with a second pipeline 15, a first stop valve 19 is arranged between the first pipeline 14 and the second pipeline 15, and a first clamp is arranged at the connecting end of the first stop valve 19 and the first pipeline 14. The first stop valve 19 is used to control the filling amount of the simulant liquid, and after the height of the designated liquid level is reached, the first stop valve 19 is closed to keep the height of the liquid level in the test tank 13 constant. The first clamp enables the first pipeline 14 and the test storage box 13 to be rapidly disassembled and assembled, so that the state conversion efficiency is improved, and the adverse effect of the auxiliary pipeline on the shaking test result is reduced.
The second branch pipeline is connected with the bottommost end of the test storage tank 13 and a communication pipeline and comprises a third pipeline 16, a second stop valve 20 and a second clamp; wherein, the lowest end and the second stop valve 20 of experimental tank 13 are being connected to third pipeline 16, and the second clamp is installed in second stop valve 20 and the fourth pipeline 17 junction end department of communicating pipe way, makes and realizes quick assembly disassembly between communicating pipe way and the experimental tank 13. In the tank liquid shaking test, the second branch pipeline is connected with the test tank 13 to shake together, the communicating pipeline connected with the liquid level measurement organic glass pipe 10 is separated from the test tank 13, the test process of tank shaking is not participated, and the influence of the additional mass on shaking dynamics test parameters is reduced as much as possible.
The communicating pipeline is connected with a second branch pipeline and the liquid level measuring organic glass tube 10 and comprises a fourth pipeline 17, a third stop valve 21 and a fifth pipeline 18; wherein, the fourth pipeline 17 is connected with the second stop valve 20 of the second branch pipeline, the fifth pipeline 18 is connected with the lower port of the liquid level measurement organic glass tube 10, and the third stop valve 21 is installed between the fourth pipeline 17 and the fifth pipeline 18. The second stop valve 20 and the third stop valve 21 can be independently opened and closed, and the communication and the interception functions of the communication pipeline are realized.
The invention relates to a liquid level measuring system of a shaking test storage tank, which comprises the following steps:
and 2, starting the filling and discharging unit 5 to fill propellant simulation liquid, opening the first stop valve 19, and closing the first stop valve 19 when the liquid in the second branch pipeline is full and just reaches the bottom position of the test storage tank 13, and recording as the zero position of the bottom of the tank. Reading the actual liquid level height of the liquid level measurement organic glass tube 10 at the zero position, and recording;
step 4.1, during liquid level measurement, keeping the second stop valve 20 and the third stop valve 21 in an open state, and ensuring that an exhaust port of the test storage tank 13 and a pipe orifice at the upper end of the liquid level measurement organic glass pipe 10 are both in the same phase with the atmosphere;
step 4.2, starting the filling and draining unit 5 and opening the first stop valve 19, filling propellant simulation liquid into the test storage tank 13, and simultaneously observing the liquid level change conditions of the test storage tank 13 and the liquid level measurement organic glass tube 10 in real time through the video monitoring unit 3;
step 4.3, when the height of the liquid level is close to the designated scale, controlling the first stop valve 19 to slow down the filling flow rate, and performing accurate filling;
step 4.4, closing the first stop valve 19 to stop filling when the liquid level reaches the target actual height, keeping the liquid level stable and marking the height of the liquid level;
While the embodiments of the present invention have been described in detail, the above embodiments are merely preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (5)
1. A sloshing test storage tank liquid level measurement system is characterized in that:
the shaking test storage box consists of six functional units, which are respectively as follows: the device comprises a shaking unit (1), a control acquisition unit (2), a video monitoring unit (3), a test storage tank unit (4), a filling and draining unit (5) and a liquid level measuring unit (6); the control acquisition unit (2) controls the shaking unit (1) to generate shaking force meeting test conditions, actual shaking test data parameters of the shaking unit (1) are acquired, the shaking unit (1) enables the test storage tank unit (4) to generate corresponding shaking, the filling and draining unit (5) fills or drains propellant simulation liquid for the test storage tank unit (4), the liquid level measurement unit (6) is used for accurately measuring the liquid level height in the test storage tank unit (4), and the video monitoring unit (3) is used for observing the liquid level height changes in the test storage tank unit (4) and the liquid level measurement unit (6) in real time;
the test storage tank unit (4) consists of a test storage tank (13), a liquid management device (7) and an anti-shaking device, wherein the liquid management device (7) is arranged at the bottom of the test storage tank and used for controlling liquid shaking, and the anti-shaking device is arranged near the liquid level height which is most likely to generate large shaking amplitude in the test storage tank and used for weakening liquid level shaking;
the system also comprises a liquid level measurement organic glass tube (10) with a fixed scale (11), a first branch pipeline, a second branch pipeline and a communicating pipeline;
an exhaust port at the upper end of the test storage tank (13) is communicated with an upper port of the liquid level measurement organic glass tube (10) or both are communicated with the atmosphere;
the first branch pipeline comprises a first pipeline (14), a second pipeline (15) and a first stop valve (19), the filling and draining system unit (5) is connected with the first pipeline (14), the bottom of the test storage tank (13) is connected with the second pipeline (15), and the first stop valve (19) is arranged between the first pipeline (15) and the second pipeline (15);
the second branch pipeline comprises a third pipeline (16) and a second stop valve (20), and the third pipeline (16) is connected with the bottommost end of the test storage tank (13) and the second stop valve (20);
the communicating pipeline comprises a fourth pipeline (17), a third stop valve (21) and a fifth pipeline (18), the fourth pipeline (17) is connected with a second stop valve (20) of the second branch pipeline, the fifth pipeline (18) is connected with a lower port of the liquid level measurement organic glass pipe (10), and the third stop valve (21) is installed between the fourth pipeline (17) and the fifth pipeline (18).
2. A slosh test tank level measuring system according to claim 1 further comprising a first clamp, a second clamp, said first clamp being mounted at the junction of the first shut-off valve (19) and the first pipe (14), said second clamp being mounted at the junction of the second shut-off valve (20) and the fourth pipe (17) connecting the pipes.
3. The sloshing test tank liquid level measuring system according to claim 1, wherein the video monitoring unit (3) is composed of a test tank monitoring device (22) and a liquid level measurement organic glass tube monitoring device (23), and the test tank monitoring device (22) and the liquid level measurement organic glass tube monitoring device (23) are monitored in time synchronization.
4. The sloshing test storage tank liquid level measuring system according to claim 1, further comprising a lower end fixing device (12), an upper end fixing device (9) and a dust cover (8) respectively installed at the lower end, the upper end and the upper port of the liquid level measuring organic glass tube (10).
5. A slosh test tank level measurement system according to claim 3, the measurement method comprising the steps of:
step 1, opening a second stop valve (20) and a third stop valve (21);
step 2, starting a filling and draining unit (5) to fill propellant simulation liquid, opening a first stop valve (19), closing the first stop valve (19) when liquid in a second branch pipeline is full and just reaches the bottom position of the test storage tank (13), recording as the zero position of the bottom of the tank, reading the actual liquid level height of the organic glass tube (10) for liquid level measurement at the zero position, and recording;
step 3, obtaining the relative height of the liquid level from the bottom of the tank according to the test requirements, and then calculating by referring to the zero position of the bottom of the tank to obtain the actual target height;
step 4, filling and measuring;
step 4.1, keeping the second stop valve (20) and the third stop valve (21) in an open state, and ensuring that an exhaust port at the upper end of the test storage box (13) and an upper port of the liquid level measurement organic glass tube (10) are communicated with the atmosphere;
step 4.2, starting a filling and draining unit (5), opening a first stop valve (19), filling propellant simulation liquid into the test storage tank (13), and observing the liquid level change conditions of the test storage tank (13) and the liquid level measurement organic glass tube (10) through a test storage tank monitoring device (22) and a liquid level measurement organic glass tube monitoring device (23);
step 4.3, when the height of the liquid level is close to the designated scale, controlling a first stop valve (19) to slow down the filling flow rate, and performing accurate filling;
step 4.4, closing the first stop valve (19) to stop filling when the liquid level reaches the target actual height, keeping the liquid level stable and marking the height of the liquid level;
step 5, closing the second stop valve (20) and the third stop valve (21), and removing the first clamp, the second clamp and the auxiliary pipelines thereof;
step 6, carrying out a tank shaking test; and after the test is finished, the test storage tank (13) is communicated with the first pipeline (14) and the communication pipeline respectively, the filling and draining unit (5) is started to drain the propellant simulation liquid, the processes from the step 1 to the step 6 are repeated, and the measurement of the next liquid level state is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410843876.2A CN105806443B (en) | 2014-12-30 | 2014-12-30 | Liquid level measuring system of shaking test storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410843876.2A CN105806443B (en) | 2014-12-30 | 2014-12-30 | Liquid level measuring system of shaking test storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105806443A CN105806443A (en) | 2016-07-27 |
| CN105806443B true CN105806443B (en) | 2022-04-19 |
Family
ID=56420095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410843876.2A Expired - Fee Related CN105806443B (en) | 2014-12-30 | 2014-12-30 | Liquid level measuring system of shaking test storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105806443B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106689B (en) * | 2017-11-16 | 2019-06-11 | 浙江大学 | A kind of modeling method and device using pressure sensor on-line monitoring agricultural machinery medicine-chest residue drug storage amount |
| CN109647826B (en) * | 2018-12-28 | 2021-02-23 | 天津航天长征火箭制造有限公司 | Cleaning method of jet flow ultrasonic cleaning system for excess materials of spacecraft storage box |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007034973A1 (en) * | 2007-07-26 | 2009-01-29 | Technotrans Ag | Fluid supply for e.g. offset printing machine, has fluid tank with level sensor supplying output signals continuously changed with levels such that associated levels are clearly determined based on respective signals |
| CN201638929U (en) * | 2009-12-14 | 2010-11-17 | 洛阳栾川钼业集团股份有限公司 | Sealing ring of antenna interface of RTK mobile station |
| CN102128662A (en) * | 2010-12-31 | 2011-07-20 | 北京遥测技术研究所 | Segmental capacitor type continuous liquid level sensor |
| DE102011052352A1 (en) * | 2011-08-02 | 2013-02-07 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Fuel level measuring device |
| CN103407590A (en) * | 2013-07-19 | 2013-11-27 | 上海空间推进研究所 | Propellant storage box for spacecraft ground test |
| CN203616128U (en) * | 2013-11-20 | 2014-05-28 | 北京宇航系统工程研究所 | Testing system of liquid rocket supercritical helium supercharging |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7373817B2 (en) * | 2004-07-09 | 2008-05-20 | Touchsensor Technologies, Llc | Solid state fluid level sensor |
| US7421895B1 (en) * | 2005-04-21 | 2008-09-09 | Caldwell Joseph W | Fluid level measuring system |
| CN201210074Y (en) * | 2008-04-12 | 2009-03-18 | 山西太钢不锈钢股份有限公司 | Device preventing throwing liquid level transmitter from swinging |
| CN102095469B (en) * | 2010-12-04 | 2012-08-01 | 沈阳航空航天大学 | Device and method for measuring liquid level in storage tank by utilizing camera |
| CN203870049U (en) * | 2014-05-30 | 2014-10-08 | 嘉兴职业技术学院 | Test device for stimulating offshore oil tanker shaking |
| CN204479132U (en) * | 2014-12-30 | 2015-07-15 | 北京强度环境研究所 | A kind of dynamic test tank liquid level measuring system that shakes |
-
2014
- 2014-12-30 CN CN201410843876.2A patent/CN105806443B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007034973A1 (en) * | 2007-07-26 | 2009-01-29 | Technotrans Ag | Fluid supply for e.g. offset printing machine, has fluid tank with level sensor supplying output signals continuously changed with levels such that associated levels are clearly determined based on respective signals |
| CN201638929U (en) * | 2009-12-14 | 2010-11-17 | 洛阳栾川钼业集团股份有限公司 | Sealing ring of antenna interface of RTK mobile station |
| CN102128662A (en) * | 2010-12-31 | 2011-07-20 | 北京遥测技术研究所 | Segmental capacitor type continuous liquid level sensor |
| DE102011052352A1 (en) * | 2011-08-02 | 2013-02-07 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Fuel level measuring device |
| CN103407590A (en) * | 2013-07-19 | 2013-11-27 | 上海空间推进研究所 | Propellant storage box for spacecraft ground test |
| CN203616128U (en) * | 2013-11-20 | 2014-05-28 | 北京宇航系统工程研究所 | Testing system of liquid rocket supercritical helium supercharging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105806443A (en) | 2016-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102866095B (en) | Multifunctional seepage deformation tester and method of testing thereof | |
| CN106092853B (en) | A kind of sunken consolidation infiltration simultaneous determination instrument of soil mass water-air humidity | |
| CN108195732B (en) | Compact rock core imbibition experimental device and imbibition amount testing method | |
| CN104443430B (en) | Fold rudder face and launch test device | |
| CN109141905A (en) | A kind of six square phase test bay and its method for measuring vectored thrust | |
| CN103308438A (en) | Modular soil body permeability tester | |
| CN105806443B (en) | Liquid level measuring system of shaking test storage tank | |
| CN106198354B (en) | Seepage, stress and temperature coupling testing machine | |
| CN102680665A (en) | Suction accurately controlled pressure plate instrument capable of directly saturating soil sample | |
| CN103852086A (en) | Field calibration method of optical fiber strapdown inertial navigation system based on Kalman filtering | |
| JP2017140865A (en) | Fuel supply system, fuel supply method, and aircraft | |
| CN104122122B (en) | Pressure stability sampling apparatus | |
| CN202599945U (en) | Suction accuracy control type pressure plate capable of directly saturating soil sample | |
| CN204064740U (en) | Pressure stability sampling apparatus | |
| CN204479132U (en) | A kind of dynamic test tank liquid level measuring system that shakes | |
| CN104908981B (en) | The vertical atmospheric pressure compensated equipment of multiple degrees of freedom air floating platform and vertical atmospheric pressure compensating method | |
| CN203203650U (en) | Automatic calibrating device for measuring capacity of irregular ship cabin | |
| CN106679895A (en) | Automatic leakage rate testing system applied to large space environment simulator | |
| CN202631497U (en) | Controllable correction environment-based measurement device for atmospheric water isotope gradient and vertical fractionation process | |
| CN107144513A (en) | A kind of soil moisture infiltration rate test device | |
| CN108572055B (en) | AUV underwater recovery fluid dynamic test experimental device applied to pool laboratory | |
| CN107830979B (en) | Visual pilot cobalt target cobalt rod flow induced vibration experimental device | |
| CN110736692A (en) | automatic device and method for measuring permeability coefficient of soil body | |
| CN109443386A (en) | A kind of real-time high-precision gravitational compensation method | |
| CN104089754A (en) | Method and device for capturing bubble polymerization process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220419 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |