CN110763300A - System and method for measuring dynamic liquid level in pipe under steam water working condition - Google Patents
System and method for measuring dynamic liquid level in pipe under steam water working condition Download PDFInfo
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- CN110763300A CN110763300A CN201911019072.XA CN201911019072A CN110763300A CN 110763300 A CN110763300 A CN 110763300A CN 201911019072 A CN201911019072 A CN 201911019072A CN 110763300 A CN110763300 A CN 110763300A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
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- 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
- G01F23/80—Arrangements for signal processing
Abstract
The invention relates to a system and a method for measuring the dynamic liquid level in a pipe under the working condition of steam water, which are used for measuring the liquid level in a steam-water mixing pipe; the measurement system includes: the pressure guiding system comprises a positive end pressure guiding subsystem and a negative end pressure guiding subsystem, and the positive end and the negative end of the differential pressure transmitter are respectively connected with a water area and a steam area of the steam-water mixing pipe through the positive end pressure guiding subsystem and the negative end pressure guiding subsystem; the instrument control system comprises an instrument control terminal, a pressure transmitter, a steam temperature measuring thermocouple and a water temperature measuring thermocouple, wherein the pressure transmitter and the steam temperature measuring thermocouple are respectively connected to a steam area of the steam-water mixing pipe, and the water temperature measuring thermocouple is connected to a water area of the steam-water mixing pipe; the instrument control terminal is respectively electrically connected with the differential pressure transmitter, the steam temperature measuring thermocouple and the water temperature measuring thermocouple, and the technical problem that the traditional liquid level meter cannot meet the requirement of real-time and accurate measurement of the liquid level in the pipe is solved.
Description
Technical Field
The invention relates to the technical field of liquid level measurement, in particular to a system and a method for measuring the dynamic liquid level in a pipe under the working condition of high-temperature and high-pressure steam water.
Background
A steam generator in a loop system of the nuclear power station is used as a high-temperature steam source, saturated steam and water working media with high temperature and high pressure are filled in the steam generator, water and steam are mixed and rise in the steam generator, and most of water flows into a water return pipe through a water drainage hole behind a rotary vane separator to be recycled and returned.
Under the working condition of high-temperature and high-pressure steam water, the accurate measurement of the dynamic liquid level in the pipe has important significance for maintaining the stable and efficient operation of the steam generator, so that the liquid level in the pipe needs to be accurately measured and controlled. Too high a level will cause a back flow retardation of the separated water, and too low a level will affect the separated water circulation efficiency. Under the working condition of high-temperature and high-pressure operation, the liquid level in the pipe fluctuates more violently, and the environmental conditions are harsh; and because of the existence of high-temperature high-pressure steam, the liquid level in the pipeline is extremely unstable, and a large transition space exists in a steam-water interface.
At present, traditional level gauge can't satisfy the instant accurate measurement of intraductal liquid level of geminate transistors, if: the mica liquid level meter can not work normally under the high temperature condition; the electric contact liquid level meter has fast dynamic response and small temperature interference, but fine liquid drops entrained in steam can influence the measurement; the traditional differential pressure liquid level meter with an external balance container is difficult to accurately measure the high-temperature and high-pressure water working medium liquid level with large density change.
Disclosure of Invention
The invention aims to provide a system and a method for measuring the dynamic liquid level in a pipe under the working condition of steam water, and aims to solve the technical problem that the traditional liquid level meter cannot meet the requirement of real-time and accurate measurement of the liquid level in the pipe.
In order to solve the above problems, the present invention provides a system for measuring a dynamic liquid level in a steam-water mixing pipe under a steam-water working condition, wherein the steam-water mixing pipe comprises a steam region and a water region, and the measuring system comprises:
a differential pressure transmitter;
the pressure guiding system comprises a positive end pressure guiding subsystem and a negative end pressure guiding subsystem, and the positive end and the negative end of the differential pressure transmitter are respectively connected with a water area and a steam area of the steam-water mixing pipe through the positive end pressure guiding subsystem and the negative end pressure guiding subsystem;
the steam temperature thermocouple is connected with the steam area, and the water temperature thermocouple is connected with the water area; and the instrument control terminal is respectively and electrically connected with the differential pressure transmitter, the steam temperature measuring thermocouple and the water temperature measuring thermocouple.
Preferably, the positive end of the differential pressure transmitter is respectively provided with a positive end stop valve and a positive end blowdown nut, the negative end is respectively provided with a negative end stop valve and a negative end blowdown nut, and a balance valve is arranged between the positive end stop valve and the negative end stop valve.
Preferably, the positive end pressure-leading subsystem comprises a positive end lower root valve, a positive end balancing container and a positive end upper root valve which are sequentially connected through a positive end pressure-leading pipe, and a positive end emptying valve is further arranged at the upper part of the positive end balancing container;
the negative end pressure leading subsystem comprises a negative end lower root valve, a negative end balancing container and a negative end upper root valve which are sequentially connected through a negative end pressure leading pipe, and a negative end emptying valve is further arranged at the upper part of the negative end balancing container;
the negative end pressure guiding pipe between the negative end lower root valve and the negative end balancing container is also connected with a water supply pipe, and a water injection valve is arranged on the water supply pipe.
Preferably, the bottom of the steam-water mixing pipe is also provided with an adjusting valve.
The invention also provides a measuring method for implementing the measuring system, which comprises the following steps:
first, system evacuation
Before the working condition of high-temperature and high-pressure steam water is not established, opening a balance valve, a positive end stop valve, a negative end stop valve, a positive end lower root valve and a negative end lower root valve, closing a positive end upper root valve and a negative end upper root valve, opening a positive end emptying valve and a negative end emptying valve, and respectively unscrewing a positive end drain nut and a negative end drain nut; a water injection valve is opened to discharge residual sewage, bubbles and small particle impurities in the positive end pressure guide pipe and the negative end pressure guide pipe, so that the cleanness of the whole measuring system is ensured;
second, initialize
Screwing the positive-end blowdown nut and the negative-end blowdown nut, injecting water into the pressure guiding pipe system through the water supply pipe, controlling the pressure of water supply through adjusting the water injection valve, and closing the root valve below the positive end after water is injected to the position of the positive-end emptying valve and then discharged; after water is continuously injected until water is discharged from the emptying valve at the negative end, closing the water injection valve and stopping water supply; closing the balance valve, opening the positive end lower root valve, and then closing the positive end emptying valve and the negative end emptying valve; the root valve on the positive end and the root valve on the negative end are opened, and the differential pressure transmitter displays the indication delta P in real timeHAnd sending the data to an instrument control terminal, and after receiving the data, calculating by a preset built-in formula to obtain a vertical height difference H between a positive end measuring point and a negative end measuring point:
in the formula:
ρ0-water density at site ambient temperature and pressure;
g-is the local gravitational acceleration;
completing the initialization of the measuring system;
third, test
After the working condition of high-temperature and high-pressure steam water is established, the instrument control terminal receives the pressure P in the steam-water mixing pipe measured by the pressure transmitter, the water temperature measuring thermocouple and the steam temperature measuring thermocouple in real time1Water temperature T1Temperature T of steam2(ii) a After the instrument control terminal obtains temperature and pressure parameters, the water density rho in the steam-water mixing pipe under corresponding working conditions can be obtained in real time according to the built-in associated water physical functionWater (W)And steam density pSteam generatorAt this time, the pressure difference between the positive end and the positive end measuring point of the differential pressure transmitter is as follows:
P1-P1 *＝ρ0gh1(2)
in the formula:
P1-positive end pressure of differential pressure transmitter;
P1 *-measuring the point pressure at the positive end;
h1-positive terminal of differential pressure transmitterThe vertical distance and height difference between the measuring point and the positive end;
the pressure difference between the measuring points of the negative end and the negative end of the differential pressure transmitter is as follows:
P2-P2 *＝ρ0gh2(3)
in the formula:
P2-negative end pressure of differential pressure transmitter;
P2 *-measuring the point pressure at the negative terminal;
h2-a vertical distance height difference between the negative end and the negative end of the differential pressure transmitter;
the pressure difference between the positive end measuring point and the negative end measuring point is:
P1 *-P2 *＝ρwater (W)ghLiquid for treating urinary tract infection+ρSteam generatorg(H-hLiquid for treating urinary tract infection) (4)
The differential pressure transmitter has the following readings:
ΔP＝P1-P2(5)
obtaining the liquid level of the steam-water mixing pipe in a combined vertical mode (1) - (5):
the instrument control terminal carries out real-time processing and temperature and pressure correction on the acquired pressure difference data according to a built-in formula, liquid level data is obtained and displayed so as to be convenient to monitor, the liquid level data changes in real time along with measurement parameters, and real-time accurate monitoring of dynamic liquid levels in the pipe under the working condition of high-temperature and high-pressure steam water is achieved.
Compared with the prior art, the invention has the following technical effects:
in the invention, the positive end and the negative end of the differential pressure transmitter are respectively connected with the water area and the steam area of the steam-water mixing pipe through the positive end pressure guiding subsystem and the negative end pressure guiding subsystem, and the pressure of a measuring point can be rapidly transmitted to the two ends of the differential pressure transmitter based on the incompressibility of water, thereby ensuring the instantaneity and the continuity of liquid level measurement. The pressure difference, the temperature and the pressure signals are converted into electric signals to be transmitted to the instrument control system, so that remote monitoring, data processing and correction are realized, and the dynamically changed liquid level is continuously and accurately measured. The invention has simple principle, convenient operation, rapid dynamic response, long service life and little influence by environment, and can accurately and continuously measure the liquid level in the pipe under the working condition of high-temperature and high-pressure steam water.
When the measuring system provided by the invention is put into use, air in the pressure guide pipe is exhausted at first, so that measurement fluctuation caused by compressibility of the air in the pressure guide pipe is avoided. And at the position of measuring the steam pressure at the negative end, the negative end balance container reduces the influence of steam condensation and fluctuation on the pressure, and the balance containers at the two ends play the role of a condensation tank, so that the pressure difference transmitter is protected from being damaged by high-temperature working media, the pressure leading pipe is divided into a cold section and a hot section, the density correction based on the temperature and the pressure is respectively carried out on the two sections of working media, and the accuracy of pressure difference measurement is improved.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. In the drawings:
fig. 1 is a schematic structural diagram of a system for measuring a dynamic liquid level in a pipe under a steam water condition according to a preferred embodiment of the present invention.
Detailed Description
The present invention provides a system for measuring the dynamic liquid level in a pipe under steam water conditions, which will be described in detail with reference to fig. 1, wherein this embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments, and those skilled in the art can modify and decorate the system without changing the spirit and content of the present invention.
Referring to fig. 1, the present invention provides a system for measuring a dynamic liquid level in a steam-water pipe under a steam-water working condition, which is used for measuring a liquid level in a steam-water mixing pipe 3, wherein the steam-water mixing pipe 3 includes a steam region 31 and a water region 32 (steam is located at an upper portion of the steam-water mixing pipe 3, and water is located at a lower portion of the steam-water mixing pipe 3, so that the steam and the water are divided into the steam region 31 and the water region 32); the measurement system includes:
a differential pressure transmitter 1;
the pressure guiding system 2 comprises a positive end pressure guiding subsystem 22 and a negative end pressure guiding subsystem 21, and the positive end and the negative end of the differential pressure transmitter 1 are respectively connected with the water area and the steam area of the steam-water mixing pipe 3 through the positive end pressure guiding subsystem 22 and the negative end pressure guiding subsystem 21;
the instrument control system 4 comprises an instrument control terminal 41, a pressure transmitter 43, a steam temperature measuring thermocouple 44 and a water temperature measuring thermocouple 42, wherein the pressure transmitter 43 and the steam temperature measuring thermocouple 44 are respectively connected to the steam area 31 of the steam-water mixing pipe 3, and the water temperature measuring thermocouple 42 is connected to the water area 32 of the steam-water mixing pipe 3; the instrument control terminal 41 is respectively electrically connected with the differential pressure transmitter 1, the pressure transmitter 43, the steam temperature thermocouple 44 and the water temperature thermocouple 42.
In this embodiment, the positive end of differential pressure transmitter 1 is equipped with positive terminal stop valve 13 and positive terminal blowdown nut 14 respectively, and the negative terminal is equipped with negative terminal stop valve 11 and negative terminal blowdown nut 15 respectively, be equipped with balanced valve 12 between positive terminal stop valve 13 and the negative terminal stop valve 11.
The positive side pressure introduction subsystem 22 includes a positive side lower root valve 221, a positive side balance container 223 and a positive side upper root valve 225 sequentially connected through a positive side pressure introduction pipe 222, the positive side lower root valve 221 is connected with the positive side stop valve 13, and the positive side upper root valve 225 is connected with the water area 32; the upper part of the positive end equalization vessel 223 is also provided with a positive end evacuation valve 224;
the negative end pressure introduction subsystem 21 comprises a negative end lower root valve 211, a negative end balancing container 215 and a negative end upper root valve 217 which are sequentially connected through a negative end pressure introduction pipe 214, the negative end lower root valve 211 is connected with the negative end stop valve 11, and the negative end upper root valve 217 is connected with the steam area 31; the upper part of the negative end balance container 215 is also provided with a negative end emptying valve 216;
the negative side pressure pipe 214 between the negative side lower root valve 211 and the negative side equalization vessel 215 is also connected to a water supply pipe 212, and a fill valve 213 is provided on the water supply pipe 212.
The bottom of the steam-water mixing pipe 3 is also provided with an adjusting valve 33.
Further, a steam interface corresponding to the steam area 31 and a water interface corresponding to the water area 32 are formed in the steam-water mixing pipe 3, a root valve 225 on the positive end is connected with the water interface, and a root valve 217 on the negative end is connected with the steam interface.
All the valves are electrically connected with the instrument control terminal.
The invention also provides a measuring method of the implemented measuring system, which comprises the following steps:
first, system evacuation
Under the normal temperature and normal pressure state, namely before the working condition of high-temperature and high-pressure steam water is not established, opening the balance valve, the positive end stop valve 13, the negative end stop valve 11, the positive end lower root valve 221 and the negative end lower root valve 211, closing the positive end upper root valve 225 and the negative end upper root valve 217, opening the positive end emptying valve 224 and the negative end emptying valve 216, and respectively unscrewing the positive end drain nut 14 and the negative end drain nut 15; the water injection valve 213 is opened to discharge residual sewage, bubbles and small particle impurities in the positive end pressure guide pipe 222 and the negative end pressure guide pipe 214, so that the cleanness of the whole measuring system is ensured;
second, initialize
Screwing the positive-end blowdown nut 14 and the negative-end blowdown nut 15, injecting water into the pressure guiding pipe system through the water supply pipe 212, controlling the water supply pressure through adjusting the water injection valve 213, and closing the positive-end lower root valve 221 after water is injected to the position of the positive-end emptying valve 224 and then discharged; after water is continuously injected until water is discharged from the negative end emptying valve 216, the water injection valve 213 is closed, and water supply is stopped; close the equalization valve, open the positive side lower root valve 221, then close the positive side exhaust valve 224 and the negative side exhaust valve 216; by opening the positive end upper root valve 225 and the negative end upper root valve 217, the differential pressure transmitter 1 will display the reading Δ P in real timeHTo the instrument control terminal 41, the instrument control terminal 41After receiving the data, calculating and obtaining a vertical height difference H between the positive end measuring point and the negative end measuring point through a preset built-in formula:
in the formula:
ρ0-water density at site ambient temperature and pressure;
g-is the local gravitational acceleration;
completing the initialization of the measuring system;
third, test
After the working condition of high-temperature and high-pressure steam water is established, the instrument control terminal 41 receives the pressure P in the steam-water mixing pipe 3 measured by the pressure transmitter 43, the water temperature measuring thermocouple 42 and the steam temperature measuring thermocouple 44 in real time1Water temperature T1Temperature T of steam2(ii) a After the instrument control terminal 41 obtains the temperature and pressure parameters, the water density rho in the steam-water mixing pipe 3 under the corresponding working condition can be obtained in real time according to the built-in associated water physical functionWater (W)And steam density pSteam generatorAt this time, the pressure difference between the positive end and the positive end measuring point of the differential pressure transmitter 1 is:
P1-P1 *＝ρ0gh1(2)
in the formula:
P1-the positive end pressure of the differential pressure transmitter 1;
P1 *-measuring the point pressure at the positive end;
h1the vertical distance and height difference between the positive end and the positive end measuring point of the differential pressure transmitter 1;
the pressure difference between the measuring points of the negative end and the negative end of the differential pressure transmitter 1 is as follows:
P2-P2 *＝ρ0gh2(3)
in the formula:
P2-the negative end pressure of the differential pressure transmitter 1;
P2 *-measuring the point pressure at the negative terminal;
h2-vertical distance height difference between the negative end of the differential pressure transmitter 1 and the negative end measuring point;
the pressure difference between the positive end measuring point and the negative end measuring point is:
P1 *-P2 *＝ρwater (W)ghLiquid for treating urinary tract infection+ρSteam generatorg(H-hLiquid for treating urinary tract infection) (4)
ΔP＝P1-P2(5)
obtaining the liquid level of the steam-water mixing pipe 3 in a combined vertical mode (1) - (5):
the instrument control terminal 41 carries out real-time processing and temperature and pressure correction on the acquired pressure difference data according to a built-in formula, liquid level data is obtained and displayed so as to be convenient to monitor, the liquid level data changes in real time along with measurement parameters, and real-time accurate monitoring of dynamic liquid levels in the pipe under the working condition of high-temperature and high-pressure steam water is achieved.
The disclosure above is only one specific embodiment of the present application, but the present application is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present application.
Claims (5)
1. The utility model provides a measurement system of intraductal dynamic liquid level under steam and water operating mode for measure the liquid level in the steam-water mixing pipe, including steam region and water region in the steam-water mixing pipe, its characterized in that, measurement system includes:
a differential pressure transmitter;
the pressure guiding system comprises a positive end pressure guiding subsystem and a negative end pressure guiding subsystem, and the positive end and the negative end of the differential pressure transmitter are respectively connected with a water area and a steam area of the steam-water mixing pipe through the positive end pressure guiding subsystem and the negative end pressure guiding subsystem;
the steam temperature thermocouple is connected with the steam area, and the water temperature thermocouple is connected with the water area; and the instrument control terminal is respectively and electrically connected with the differential pressure transmitter, the steam temperature measuring thermocouple and the water temperature measuring thermocouple.
2. The system for measuring the dynamic liquid level in the pipe under the working condition of high-temperature and high-pressure steam water as claimed in claim 1, wherein the positive end of the differential pressure transmitter is respectively provided with a positive end stop valve and a positive end blowdown nut, the negative end of the differential pressure transmitter is respectively provided with a negative end stop valve and a negative end blowdown nut, and a balance valve is arranged between the positive end stop valve and the negative end stop valve.
3. The system for measuring the dynamic liquid level in the pipe under the working condition of high-temperature and high-pressure steam water as claimed in claim 2, wherein the positive end pressure leading subsystem comprises a positive end lower root valve, a positive end balancing container and a positive end upper root valve which are sequentially connected through a positive end pressure leading pipe, and a positive end emptying valve is further arranged at the upper part of the positive end balancing container;
the negative end pressure leading subsystem comprises a negative end lower root valve, a negative end balancing container and a negative end upper root valve which are sequentially connected through a negative end pressure leading pipe, and a negative end emptying valve is further arranged at the upper part of the negative end balancing container;
the negative end pressure leading pipe between the negative end lower root valve and the negative end balancing container is also connected with a water supply pipe, and a water injection valve is arranged on the water supply pipe.
4. The system for measuring the dynamic liquid level in the pipe under the working condition of high-temperature and high-pressure steam water as claimed in claim 1, wherein the bottom of the steam-water mixing pipe is further provided with a regulating valve.
5. A measuring method implementing the measuring system of claim 3, characterized in that it comprises the following steps:
first, system evacuation
Before the working condition of high-temperature and high-pressure steam water is not established, opening a balance valve, a positive end stop valve, a negative end stop valve, a positive end lower root valve and a negative end lower root valve, closing a positive end upper root valve and a negative end upper root valve, opening a positive end emptying valve and a negative end emptying valve, and respectively unscrewing a positive end drain nut and a negative end drain nut; a water injection valve is opened to discharge residual sewage, bubbles and small particle impurities in the positive end pressure guide pipe and the negative end pressure guide pipe, so that the cleanness of the whole measuring system is ensured;
second, initialize
Screwing the positive-end blowdown nut and the negative-end blowdown nut, injecting water into the pressure guiding pipe system through the water supply pipe, controlling the pressure of water supply through adjusting the water injection valve, and closing the root valve below the positive end after water is injected to the position of the positive-end emptying valve and then discharged; after water is continuously injected until water is discharged from the emptying valve at the negative end, closing the water injection valve and stopping water supply; closing the balance valve, opening the positive end lower root valve, and then closing the positive end emptying valve and the negative end emptying valve; the root valve on the positive end and the root valve on the negative end are opened, and the differential pressure transmitter displays the indication delta P in real timeHAnd sending the data to an instrument control terminal, and after receiving the data, calculating by a preset built-in formula to obtain a vertical height difference H between a positive end measuring point and a negative end measuring point:
in the formula:
ρ0-water density at site ambient temperature and pressure;
g-is the local gravitational acceleration;
completing the initialization of the measuring system;
third, test
After the working condition of high-temperature and high-pressure steam water is established, the instrument control terminal receives the pressure P in the steam-water mixing pipe measured by the pressure transmitter, the water temperature measuring thermocouple and the steam temperature measuring thermocouple in real time1Water temperature T1Temperature T of steam2(ii) a After the instrument control terminal obtains temperature and pressure parameters, the water density rho in the steam-water mixing pipe under corresponding working conditions can be obtained in real time according to the built-in associated water physical functionWater (W)And steam density pSteam generatorAt this time, the pressure difference between the positive end and the positive end measuring point of the differential pressure transmitter is as follows:
P1-P1 *＝ρ0gh1(2)
in the formula:
P1-positive end pressure of differential pressure transmitter;
P1 *-measuring the point pressure at the positive end;
h1-a vertical distance height difference between the positive end of the differential pressure transmitter and the positive end measuring point;
the pressure difference between the measuring points of the negative end and the negative end of the differential pressure transmitter is as follows:
in the formula:
P2-negative end pressure of differential pressure transmitter;
h2-a vertical distance height difference between the negative end and the negative end of the differential pressure transmitter;
the pressure difference between the positive end measuring point and the negative end measuring point is:
the differential pressure transmitter has the following readings:
ΔP＝P1-P2(5)
obtaining the liquid level of the steam-water mixing pipe in a combined vertical mode (1) - (5):
the instrument control terminal carries out real-time processing and temperature and pressure correction on the acquired pressure difference data according to a built-in formula, liquid level data is obtained and displayed so as to be convenient to monitor, the liquid level data changes in real time along with measurement parameters, and real-time accurate monitoring of dynamic liquid levels in the pipe under the working condition of high-temperature and high-pressure steam water is achieved.
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| CN201911019072.XA CN110763300A (en) | 2019-10-24 | 2019-10-24 | System and method for measuring dynamic liquid level in pipe under steam water working condition |
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| CN201911019072.XA CN110763300A (en) | 2019-10-24 | 2019-10-24 | System and method for measuring dynamic liquid level in pipe under steam water working condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692334A (en) * | 2020-06-22 | 2020-09-22 | 中国核动力研究设计院 | Pressure vessel liquid level measurement system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692334A (en) * | 2020-06-22 | 2020-09-22 | 中国核动力研究设计院 | Pressure vessel liquid level measurement system and method |
| CN111692334B (en) * | 2020-06-22 | 2022-04-15 | 中国核动力研究设计院 | Pressure vessel liquid level measurement system and method |
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