CN104061976B - A kind of hydraulic reservoir liquid level dynamic monitoring device and monitoring method - Google Patents
A kind of hydraulic reservoir liquid level dynamic monitoring device and monitoring method Download PDFInfo
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- CN104061976B CN104061976B CN201410334238.8A CN201410334238A CN104061976B CN 104061976 B CN104061976 B CN 104061976B CN 201410334238 A CN201410334238 A CN 201410334238A CN 104061976 B CN104061976 B CN 104061976B
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- liquid level
- controller
- hydraulic reservoir
- alarm
- dynamic monitoring
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Abstract
The present invention provides a kind of hydraulic reservoir liquid level dynamic monitoring device and dynamic monitoring and controlling method, the wherein described hydraulic reservoir liquid level dynamic monitoring device includes controller and the liquid level sensor for detecting hydraulic reservoir liquid level, the analog signal output of liquid level sensor is connected by communication cable with the Analog input mModule of controller, and the digital output module of controller is connected with an alarm.The controller is connected with a display unit.The dynamic monitoring of oil tank liquid level can be achieved in the invention; can be when just leakage takes place in fuel tank with regard to energy and alarm; consequently facilitating investigation is handled early; so as to prevent security risk; and reduce economic loss; the variable quantity of oil tank liquid level in preset time period can also be known by calculating, decision-making foundation is provided for operator, makes operator easy to make correct selection between shutdown loss and leakage loss；And it is simple in structure, it is easy to utilize.
Description
Technical field
The present invention relates to oil tank liquid level monitoring field, is specially the hydraulic pressure that a kind of liquid level signal is exported with analog signal form
System oil tank liquid level dynamic monitoring device and monitoring method.
Background technology
Hydraulic system is in power transmission and the core status automatically controlled, and oil leak is most prominent existing for hydraulic system asks
Topic.Since pipeline is numerous, the leakage point in many shelters is difficult to find by point inspection.
In view of hydraulic system pressure is high, flow is big, and leakage failure often occurs suddenly.Oil leakage phenomenon is once in concealed location
Or when nobody perceives, then can trigger a large amount of leakages, larger economic loss, pollution environment can be not only caused, also has fire
Calamity hidden danger.
Existing level monitoring system, is equipped with transparent glass tube or magnetic double level gauge usually beside fuel tank, by an inspection
The inspection of personnel, record, discover whether oil leak, not only cannot and alarm, and can not judge the size of oil liquid leakage amount, it is impossible to
Decision-making foundation is provided for operator, operator can not make correct selection between shutdown loss and leakage loss.
Hydraulic system for driving more hydraulic actuating mechanisms, when Duo Tai executing agencies act at the same time, oil tank liquid level
Decline to a great extent in a short time, its fall is far longer than leakage rate caused by pipeline leakage.Existing monitoring system will be considered that
Oil liquid leakage and judge by accident, so as to send error message, even result in the unexpected protectiveness of pump group and jump pump and shut down.
In addition, for vertical installation or the less fuel tank of cross-sectional area, once the oil leak of larger flow occurs, due to liquid level
Quickly, control system does not often receive oil leak feedback signal to decrease speed, this is toward causing FCL fluid to leak what is finished quickly
Consequence.Due to failing to judge for existing monitoring system, staff tends not to find fuel tank oil leak in time, it is impossible to makes in time rationally
Processing so that pump group unexpected protectiveness in extremely low liquid level is jumped pump and is shut down, and triggers serious production accident or equipment breakdown, makes
Into larger economic loss.
This is the deficiencies in the prior art.
The content of the invention
The technical problem to be solved in the present invention is in view of the deficiencies of the prior art, there is provided a kind of hydraulic reservoir liquid level
, it can be achieved that the dynamic monitoring of oil tank liquid level leakage can have just taken place in fuel tank in dynamic monitoring device and dynamic monitoring and controlling method
When just can and alarm, consequently facilitating early investigation handle, prevent security risk and reduce economic loss.
In order to solve the above technical problems, the present invention provides a kind of hydraulic reservoir liquid level dynamic monitoring device, including
Controller and the liquid level sensor for detecting hydraulic reservoir liquid level, the analog signal output of liquid level sensor, which passes through, to be led to
News cable is connected with the Analog input mModule of controller, and the digital output module of controller is connected with an alarm.
The controller uses PLC controller.
The controller is connected with a display unit.
The display unit uses PC machine.
The present invention provides a kind of hydraulic reservoir liquid level dynamic monitoring and controlling method, including step：
(1) analog signal of liquid level in hydraulic reservoir is gathered by liquid level sensor, and the simulation collected is believed
Number send to controller；
(2) controller receives the analog signal that liquid level sensor transmits, and through calculation process, the analog signal received is turned
Turn to digital signal；
(3) controller generates oil tank liquid level-time performance graph, and it is single to be transferred to display according to above-mentioned digital signal
Member, carries out the real-time display of oil tank liquid level change；
(4) controller calculates above-mentioned oil tank liquid level-time performance graph, calculates oily in preset time period Δ t
The high variable quantity Δ h of case liquid level, and calculate change rate η=Δ h/ Δ t, wherein η of oil tank liquid level in preset time period Δ t
＞ 0；
(5) controller determines whether control alarm by the change rate η calculated compared with default change rate threshold value
Device carries out oil leakage alarm.
Default change rate threshold value described in step (5) includes default maximum rate of change threshold value η2And minimum rate of change
Threshold value η1, wherein 0<η1<η2。
Described in step (5) determine whether to control alarm carry out oil leakage alarm method be：If 0<η<η1, then judge
Oil-proof for fuel tank, controller control alarm does not send alarm；If η1≤η≤η2, then it is determined as fuel tank oil leak, controller control
Alarm processed is alarmed；If η>η2, then it is determined as that fuel tank is oil-proof, controller control alarm does not send alarm.
For step (4), further, according to the length a and width b of default fuel tank, controller calculates and by aobvious
Show that unit shows fuel tank oil leak amount Δ V=a*b* Δ h in preset time period Δ t, wherein, Δ h is fuel tank in preset time period Δ t
The high variable quantity of liquid level.
Wherein, in the method, the display unit can use PC machine.
Compared with prior art, the advantage of the invention is that：
The static monitoring of existing oil tank liquid level is embodied as dynamic and monitored by the present invention, can be shown in real time by display unit
The performance graph of oil tank liquid level-time, and can be according to the change of the performance graph slope, when fuel tank has just started leakage with regard to energy
And alarm, so as to remind operating personnel to reduce oil liquid leakage loss to carrying out investigation processing whether fuel tank oil leak early
Further expand, avoid pump group unexpected protectiveness in extremely low liquid level from jumping the generation that pump shuts down phenomenon, can not only reduce economic damage
Lose, can also prevent security risk and reduce environmental pollution；Further, it is also possible to know oil tank liquid level in preset time period by calculating
Variable quantity, provide decision-making foundation for operator, make operator easy to made between shutdown loss and leakage loss correctly
Selection；In addition, electric elements quantity used in the present invention is few, and it is simple in structure, there is higher application value.
Brief description of the drawings
Fig. 1 is the structure diagram of present hydraulic system oil tank liquid level dynamic monitoring device.
Fig. 2 is the block diagram of present hydraulic system oil tank liquid level dynamic monitoring and controlling method.
Fig. 3 is present invention determine that whether controlling the method flow diagram of alarm progress oil leakage alarm.
Embodiment
As shown in Figure 1, a kind of hydraulic reservoir liquid level dynamic monitoring device of the present invention, including controller and for examining
The liquid level sensor of hydraulic reservoir liquid level is surveyed, the analog signal output of liquid level sensor passes through communication cable and controller
Analog input mModule be connected, the digital output module of controller is connected with an alarm.
Wherein, the controller uses PLC controller；The controller is connected with a display unit, the display
Unit uses PC machine.
As shown in Fig. 2, a kind of hydraulic reservoir liquid level dynamic monitoring and controlling method of the present invention, including step：
(1) analog signal of liquid level in hydraulic reservoir is gathered by liquid level sensor, and the simulation collected is believed
Number send to controller.
(2) controller receives the analog signal that liquid level sensor transmits, and through calculation process, the analog signal received is turned
Turn to digital signal.
(3) controller generates oil tank liquid level-time performance graph, and it is single to be transferred to display according to above-mentioned digital signal
Member, carries out the real-time display of oil tank liquid level change.
(4) controller calculates above-mentioned oil tank liquid level-time performance graph, calculates oily in preset time period Δ t
The high variable quantity Δ h of case liquid level, and calculate change rate η=Δ h/ Δ t, wherein η of oil tank liquid level in preset time period Δ t
＞ 0.
In addition, length a and width b according to default fuel tank, calculate and show preset time period by display in real time
Fuel tank oil leak amount Δ V=a*b* Δ h in Δ t, wherein, Δ h is the high variable quantity of oil tank liquid level in preset time period Δ t.On
State leakage rate Δ V and real-time display is carried out by display unit, decision-making foundation can be provided for operator, person easy to operation is shutting down damage
Correct selection is made between leakage loss of becoming estranged.
(5) controller determines whether control alarm by the change rate η calculated compared with default change rate threshold value
Device carries out oil leakage alarm.
Default change rate threshold value described in step (5) includes default maximum rate of change threshold value η2And minimum rate of change
Threshold value η1, wherein 0<η1<η2。
Wherein, during by the change rate η calculated compared with default change rate threshold value, sentencing described in step (5)
The fixed specific method for whether controlling alarm to carry out oil leakage alarm is as shown in Figure 3：If 0<η<η1, then it is determined as that fuel tank is oil-proof,
Controller control alarm does not send alarm；Otherwise, if η1≤η≤η2, then it is determined as fuel tank oil leak, controller control alarm
Alarm；Otherwise η>η2, it is determined as that fuel tank is oil-proof, controller control alarm does not send alarm.
Wherein, the display unit uses PC machine.
Oil liquid leakage loss can be greatly decreased in the present invention, reduce environmental pollution, and reduce fire hazard, it is simple in structure again
Low cost, has higher application value.
Claims (3)
1. a kind of hydraulic reservoir liquid level dynamic monitoring and controlling method based on hydraulic reservoir liquid level dynamic monitoring device, it is special
Sign is that the hydraulic reservoir liquid level dynamic monitoring device includes controller and for detecting hydraulic reservoir liquid level
Liquid level sensor, the Analog input mModule phase that the analog signal output of liquid level sensor passes through communication cable and controller
Even, the digital output module of controller is connected with an alarm；The controller uses PLC controller；The control
Device is connected with a display unit；The hydraulic reservoir liquid level dynamic monitoring and controlling method includes step：
(1) analog signal of liquid level in hydraulic reservoir is gathered by liquid level sensor, and the analog signal collected is sent out
Send to controller；
(2) controller receives the analog signal that liquid level sensor transmits, and through calculation process, the analog signal received is converted into
Digital signal；
(3) controller is according to above-mentioned digital signal, generation oil tank liquid level-time performance graph, and is transferred to display unit, into
The real-time display of row oil tank liquid level change；
(4) controller calculates above-mentioned oil tank liquid level-time performance graph, calculates fuel tank liquid in preset time period Δ t
The high variable quantity Δ h of position, and calculate change rate η=Δ h/ Δ t, wherein η ＞ 0 of oil tank liquid level in preset time period Δ t；
(5) controller by the change rate η calculated compared with default change rate threshold value, determine whether control alarm into
Row oil leakage alarm；
Default change rate threshold value described in step (5) includes default maximum rate of change threshold value η2With minimum rate of change threshold value
η1, wherein 0 ＜ η1＜ η2；
Described in step (5) determine whether to control alarm carry out oil leakage alarm method be：If 0 ＜ η ＜ η1, then it is determined as
Fuel tank is oil-proof, and controller control alarm does not send alarm；If η1≤η≤η2, then it is determined as fuel tank oil leak, controller control
Alarm is alarmed；If η ＞ η2, then it is determined as that fuel tank is oil-proof, controller control alarm does not send alarm.
2. hydraulic reservoir liquid level dynamic monitoring and controlling method according to claim 1, it is characterised in that for step (4),
Further, the length a and width b according to default fuel tank, controller calculate and show preset time period by display unit
Fuel tank oil leak amount Δ V=a*b* Δ h in Δ t, wherein, Δ h is the high variable quantity of oil tank liquid level in preset time period Δ t.
3. hydraulic reservoir liquid level dynamic monitoring and controlling method according to claim 2, it is characterised in that the display list
Member uses PC machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410334238.8A CN104061976B (en) | 2014-07-14 | 2014-07-14 | A kind of hydraulic reservoir liquid level dynamic monitoring device and monitoring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410334238.8A CN104061976B (en) | 2014-07-14 | 2014-07-14 | A kind of hydraulic reservoir liquid level dynamic monitoring device and monitoring method |
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| CN104061976A CN104061976A (en) | 2014-09-24 |
| CN104061976B true CN104061976B (en) | 2018-05-04 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840583A (en) * | 2016-05-16 | 2016-08-10 | 上海科尔本施密特活塞有限公司 | Liquid level measuring and monitoring device and liquid level measurement method for hydraulic pump |
| CN105909595B (en) * | 2016-05-27 | 2018-01-19 | 天津一重电气自动化有限公司 | A kind of method for judging hydraulic station oil leak and pressure oscillation |
| CN106595801A (en) * | 2017-02-27 | 2017-04-26 | 北京晨淼科技有限公司 | Oil storage device oil level monitoring system |
| CN107144317A (en) * | 2017-05-16 | 2017-09-08 | 中冶赛迪装备有限公司 | A kind of Intelligent liquid level meter |
| CN110647064A (en) * | 2018-11-26 | 2020-01-03 | 广东韶钢松山股份有限公司 | Intelligent monitoring system for hydraulic lubrication station and application thereof |
| CN109780451B (en) * | 2018-12-20 | 2021-01-05 | 国电大渡河沙坪水电建设有限公司 | Power plant speed regulator oil circuit inspection method based on machine vision |
| CN111442016B (en) * | 2019-01-16 | 2021-11-16 | 宝山钢铁股份有限公司 | Automatic early warning and judging method for oil leakage of hydraulic system of continuous casting machine |
| CN110823482B (en) * | 2019-11-22 | 2021-07-23 | 马鞍山钢铁股份有限公司 | Early warning method for abnormal liquid level of oil tank of hydraulic lubricating system |
| CN111397696A (en) * | 2020-03-31 | 2020-07-10 | 中国工程物理研究院材料研究所 | Wastewater liquid level abnormal increment detection and alarm method |
| CN115013088B (en) * | 2022-06-27 | 2024-04-30 | 西安热工研究院有限公司 | Monitoring system for operation of high-pressure fire-resistant oil system |
| CN118149927B (en) * | 2024-05-13 | 2024-07-16 | 雅砻江流域水电开发有限公司 | Method, system, equipment and medium for early warning of abnormal oil level of hydraulic oil system of hydropower station |
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| US8161814B2 (en) * | 2008-06-09 | 2012-04-24 | Luna Labs, Inc. | Self-calibrating capacitive transducer for determining level of fluent materials |
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| CN101246028A (en) * | 2008-03-28 | 2008-08-20 | 周振峰 | Fuel tank oil material anti-theft monitoring system |
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| CN104061976A (en) | 2014-09-24 |
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