CN107504998A - A kind of pumping plant failure detector - Google Patents
A kind of pumping plant failure detector Download PDFInfo
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- CN107504998A CN107504998A CN201710660709.8A CN201710660709A CN107504998A CN 107504998 A CN107504998 A CN 107504998A CN 201710660709 A CN201710660709 A CN 201710660709A CN 107504998 A CN107504998 A CN 107504998A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The present invention provides a kind of pumping plant failure detector, including water pump, detection means and cistern, and the water pump connects the cistern by the detection means；The detection means includes：Vibration detection device, pressure-detecting device, water pump liquid level detector, reservoir level detection device, temperature-detecting device, noise detection apparatus and the control unit for connecting the vibration detection device, the pressure-detecting device, the water pump liquid level detector, the reservoir level detection device, the temperature-detecting device and the noise detection apparatus respectively.Pumping plant failure detector of the present invention can be detected in real time to water pump and motor; preventive protection effectively can be carried out to water pump and motor; reduce the rate of breakdown of water pump and motor; extend the service life of motor and water pump; without manually being detected; maintenance and replacement cost are reduced, is safeguarded simple and convenient.
Description
Technical field
The present invention relates to a kind of detection means, more particularly to a kind of pumping plant failure detector.
Background technology
Pumping plant is to be provided with the hydraulic power of certain pressure and flow and the device of Pneumatic pressure power and engineering.Pumping plant is main
For agricultural production, urban water supply and sewerage and across basin water delivery etc., vital effect is played in national economy life.
The security reliability of pumping plant is to weigh the important indicator of pumping plant unit quality, in order to realize Optimal Operation of Pumping Stations and height
Imitate economical operation, reduce unit failure rate, improve its security reliability, pumping plant operating states of the units is monitored diagnosis be must
So require.Conventional pumping plant fault diagnosis mode is mainly the diagnostic mode of offline periodic monitoring, and test equipment is generally portable
The measuring instrument of formula, the intricate operation of testing and diagnosing is, it is necessary to which special tester is tested, it is necessary to put into substantial amounts of manpower
Material resources, it is impossible to find and processing system failure in time.Improvement wherein for sewage need to more be picked up from source, and needing can be at the scene
Detected in real time.The means of Traditional Man monitoring, typically technical staff's collection in worksite sample, take back inspection center, by special
Industry personnel carry out analysis of experiments, easily produce that detection efficiency is low, accuracy of detection is low, the problem of can not being detected in real time, cause
The actual pollution condition of accurate judgement water body is unable to, can not meet the needs of Modern sewage improvement, also waste of manpower, material resources cost.
The content of the invention
(1) technical problems to be solved
The working condition of water pump in pump station can be detected in real time the technical problem to be solved in the present invention is to provide a kind of
, safeguard readily, without manually the be detected while pumping plant failure detector that can be stored to data, with
Overcome in the prior art for sewage detection efficiency is low, accuracy of detection is low, can not detect in real time the defects of.
(2) technical scheme
In order to solve the above technical problems, the present invention provides a kind of pumping plant failure detector, including water pump, detection means and
Cistern, the water pump connect the cistern by the detection means；The detection means includes：
Vibration detection device, for detecting the vibrating sensor output data in the water pump；The vibration detection device
The vibration parameters for detecting the motor in the water pump carry out checkout and diagnosis, and the detection to motor oscillating parameter is research water pump assembly
The important content of security reliability.
Pressure-detecting device, for detecting the pressure sensor output data in the water pump；
Water pump liquid level detector, for detecting the liquid level of the water pump；
Reservoir level detection device, for detecting the liquid level of the cistern；
Temperature-detecting device, for detecting the output data of the temperature sensor in the water pump；
Noise detection apparatus, for detecting the output data of the noise transducer in the water pump；
Control unit, described control unit connect the vibration detection device, the pressure-detecting device, the water respectively
Pump liquid level detector, the reservoir level detection device, the temperature-detecting device and the noise detection apparatus.
Further, the detection means also includes alarm and data storage, and the alarm and the data are deposited
Reservoir connects described control unit respectively.The vibration detection device detects the vibrating sensor output data beyond default
Allowable temperature value when, or the pressure-detecting device detects that the pressure sensor output data allows to press beyond default
During force value, or when the water pump liquid level detector detects that the liquid level of the water pump is less than preset value, or the water storage
When pit level detection device detects that the liquid level of the cistern is less than preset value, or the temperature-detecting device detects
When the output data of the temperature sensor exceeds default allowable temperature value, or the noise detection apparatus detects described make an uproar
When the output data of sonic transducer exceeds default acceptable noise value, described control unit, the control are transferred to by electric signal
Unit processed carries out alarm by the alarm.The data storage is used to store the vibration detection device, described
Pressure-detecting device, the water pump liquid level detector, the reservoir level detection device, the temperature-detecting device and institute
State the data that noise detection apparatus is delivered to described control unit.
Further, the detection means also includes flow information of water acquisition module, and the flow information of water acquisition module includes
Light source, the first fiber coupler, calibration sample pond, testing sample pond, the second fiber coupler and photodetector；The light source
The input of first fiber coupler is connected by optical filter, convergent lens；The output end of first fiber coupler
Connect the input of second fiber coupler, the calibration sample with testing sample pond by the calibration sample pond respectively
Pond is built with substrate standard liquid, and the testing sample pond is built with current sample to be measured；The photodetector receives described the
The output end optical signal of two fiber couplers, the optical signal is converted into electric signal, and the electric signal is sent to described
Control unit；The electric signal includes measured signal USWith calibration signal DS。
Further, described control unit includes water flow data processing module and control module；The water flow data processing
Module is used for the measured signal USWith calibration signal DSHandled, obtain contaminated water flow index, and by the contaminated water flow
Index is sent to the control module；The control module is used to carry out the contaminated water flow index and threshold value set in advance
Compare, and control command is issued to the water pump according to comparative result.
Further, the water flow data processing module includes：
Measured signal component obtains power unit, for the measured signal USHandled, obtain current sample to be measured
Light absorption value and particle concentration；
Calibration signal component obtains power unit, for the calibration signal DSHandled, obtain the suction of substrate standard liquid
Light value and particle concentration；
Contaminated water flow index obtains power unit, for the light absorption value to the current sample to be measured and particle concentration and substrate mark
The light absorption value of quasi- liquid obtains contaminated water flow index compared with particle concentration.
Further, the measured signal component obtains power unit according to the process that is calculated as below to the measured signal USCarry out
Processing：
By the measured signal USPollution signal to be measured after over-sampling is expressed as x (n), the pollution signal x to be measured
(n) difference equation met is：
c1[x(n-1)+x(n-3)]+c2X (n-2)+[x (n)+x (n-4)]=0
The coefficient c of the difference equation1、c2Respectively：
c1=-2 (cos Ω11+cosΩ12)
c2=4cos Ω11cosΩ12+2
Wherein Ω11And Ω12The light absorption value and particle concentration of current sample respectively to be measured；
The coefficient expressions that the difference equation is obtained using energy operator and differential power operator are：
Wherein, Ψ [x (n)] is the energy operator of pollution signal to be measured, and its expression formula is Ψ [x (n)]=x2(n)-x(n-
1)x(n+1)；
Υk[x (n)] is pollution signal k rank discrete differential energy operators to be measured：Its expression formula is Υk[x (n)]=x (n) x
(n+k-2)-x(n-1)x(n+k-1)；
Two coefficient expressions of the simultaneous formula difference equation, obtain the light absorption value and particle concentration of current sample to be measured
Expression formula is：
Further, the calibration signal component obtains power unit according to the process that is calculated as below to the calibration signal DSCarry out
Processing：
By the calibration signal DSCalibration pollution signal after over-sampling is expressed as y (n), the calibration pollution signal y
(n) difference equation met is：
d1[y(n-1)+y(n-3)]+d2Y (n-2)+[y (n)+y (n-4)]=0
The coefficient d of the difference equation1、d2Respectively：
d1=-2 (cos Ω21+cosΩ22)
d2=4cos Ω21 cosΩ22+2
Wherein Ω21And Ω22The respectively light absorption value and particle concentration of substrate standard liquid；
The coefficient expressions that the difference equation is obtained using energy operator and differential power operator are：
Wherein, Ψ [y (n)] is the energy operator of calibration pollution signal, and its expression formula is Ψ [y (n)]=y2(n)-y(n-
1)y(n+1)；
Υk[y (n)] is calibration pollution signal k rank discrete differential energy operators：Its expression formula is Υk[y (n)]=y (n) y
(n+k-2)-y(n-1)y(n+k-1)。
Two coefficient expressions of the simultaneous formula difference equation, obtain the light absorption value of substrate standard liquid and the table of particle concentration
It is up to formula：
Further, the contaminated water flow index obtains power unit according to formula
Obtain contaminated water flow index r.
Further, when the contaminated water flow index r is less than threshold value set in advance, the control module is to the water
Pump issues the control command of normal operation；When the contaminated water flow index r is more than or equal to threshold value set in advance, the control
Module issues the control command for being switched to sewage disposal to the water pump.
(3) beneficial effect
Pumping plant failure detector of the present invention can be detected in real time to water pump and motor, can be effectively to water pump and electricity
Machine carries out preventive protection, reduces the rate of breakdown of water pump and motor, extends the service life of motor and water pump, without
Manually detected, reduce maintenance and replacement cost, safeguarded simple and convenient.
The present invention carries out scene detection in real time using flow information of water acquisition module, and detection efficiency is high, real-time；The present invention
Flow information of water acquisition module it is simple for structure, workable, and optical system is easily integrated, stability of layout is good, and cost is low；
The contaminated water flow index precision that the water flow data processing module of the present invention obtains is high, with a high credibility to the testing result of sewage.
Brief description of the drawings
Fig. 1 is the structured flowchart of pumping plant failure detector of the present invention；
Fig. 2 is the structure chart of the flow information of water acquisition module of the present invention；
Fig. 3 is the structure chart of the water flow data processing module of the present invention.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
Refering to Fig. 1, the present invention provides a kind of pumping plant failure detector, including water pump 11, detection means 12 and cistern
13, the water pump 11 connects the cistern 13 by the detection means 12；The detection means 12 includes：
Vibration detection device 14, for detecting the output data of vibrating sensor 15 in the water pump 11；The vibration inspection
The vibration parameters progress checkout and diagnosis that device 14 detects the motor in the water pump 11 is surveyed, the detection to motor oscillating parameter is to grind
Study carefully the important content of water pump assembly security reliability.
Pressure-detecting device 16, for detecting the output data of pressure sensor 17 in the water pump 11；
Water pump liquid level detector 18, for detecting the liquid level of the water pump 11；
Reservoir level detection device 19, for detecting the liquid level of the cistern 13；
Temperature-detecting device 110, for detecting the output data of the temperature sensor 111 in the water pump 11；
Noise detection apparatus 112, for detecting the output data of the noise transducer 113 in the water pump 11；
Control unit 114, described control unit 114 connect the vibration detection device 14, pressure detecting dress respectively
Put 16, the water pump liquid level detector 18, the reservoir level detection device 19, the temperature-detecting device 110 and institute
State noise detection apparatus 112.
Wherein, in the present embodiment, the vibrating sensor 15 is electric vortex vibrating displacement transducer；Described control unit
114 are controlled by PLC single-chip microcomputers.
Refering to Fig. 1, the detection means 12 also includes alarm 115 and data storage 116, the He of alarm 115
The data storage 116 connects described control unit 114 respectively.The vibration detection device 14 detects the vibrating sensing
When the output data of device 15 exceeds default allowable temperature value, or the pressure-detecting device 16 detects the pressure sensor 17
When output data exceeds default allowable pressure value, or the water pump liquid level detector 18 detects the liquid level of the water pump 11
When being highly less than preset value, or the reservoir level detection device 19 detects the liquid level of the cistern 13 less than pre-
If during value, or the temperature-detecting device 110 detects that the output data of the temperature sensor 111 allows temperature beyond default
During angle value, or the noise detection apparatus 112 detects that the output data of the noise transducer 113 allows to make an uproar beyond default
During sound value, described control unit 114 is transferred to by electric signal, described control unit 114 is reported by the alarm 115
Alert prompting.The data storage 116 is used to store the vibration detection device 14, the pressure-detecting device 16, the water
Pump liquid level detector 18, the reservoir level detection device 19, the temperature-detecting device 110 and noise measuring dress
Put 112 data for being delivered to described control unit 114.
The detection means includes flow information of water acquisition module, the structure of the flow information of water acquisition module as shown in Fig. 2
Including light source 21, the first fiber coupler 24, calibration sample pond 25, testing sample pond 26, the second fiber coupler 27 and photoelectricity
Detector 28；The light source 21 connects the input of first fiber coupler 24 by optical filter 22, convergent lens 23；Institute
The output end for stating the first fiber coupler 24 connects described second by the calibration sample pond 25 and testing sample pond 26 respectively
The input of fiber coupler 27, the calibration sample pond 25 built with substrate standard liquid, the testing sample pond 26 built with
Current sample to be measured；The photodetector 28 receives the output end optical signal of second fiber coupler 27, by the light
Signal is converted to electric signal, and the electric signal is sent into described control unit 114；The electric signal includes measured signal US
With calibration signal DS。
Described control unit 114 includes water flow data processing module and control module；The water flow data processing module is used
In to the measured signal USWith calibration signal DSHandled, obtain contaminated water flow index, and the contaminated water flow index is sent out
It is sent to the control module；The control module is used to the contaminated water flow index and threshold value set in advance being compared,
And control command is issued to the water pump 11 according to comparative result.
The structure of the water flow data processing module as shown in figure 3, including：
Measured signal component obtains power unit, for the measured signal USHandled, obtain current sample to be measured
Light absorption value and particle concentration；
Calibration signal component obtains power unit, for the calibration signal DSHandled, obtain the suction of substrate standard liquid
Light value and particle concentration；
Contaminated water flow index obtains power unit, for the light absorption value to the current sample to be measured and particle concentration and substrate mark
The light absorption value of quasi- liquid obtains contaminated water flow index compared with particle concentration.
The measured signal component obtains power unit according to the process that is calculated as below to the measured signal USHandled：
By the measured signal USPollution signal to be measured after over-sampling is expressed as x (n), the pollution signal x to be measured
(n) difference equation met is：
c1[x(n-1)+x(n-3)]+c2X (n-2)+[x (n)+x (n-4)]=0
The coefficient c of the difference equation1、c2Respectively：
c1=-2 (cos Ω11+cosΩ12)
c2=4cos Ω11 cosΩ12+2
Wherein Ω11And Ω12The light absorption value and particle concentration of current sample respectively to be measured；
The coefficient expressions that the difference equation is obtained using energy operator and differential power operator are：
Wherein, Ψ [x (n)] is the energy operator of pollution signal to be measured, and its expression formula is Ψ [x (n)]=x2(n)-x(n-
1)x(n+1)；
Υk[x (n)] is pollution signal k rank discrete differential energy operators to be measured：Its expression formula is Υk[x (n)]=x (n) x
(n+k-2)-x(n-1)x(n+k-1)；
Two coefficient expressions of the simultaneous formula difference equation, obtain the light absorption value and particle concentration of current sample to be measured
Expression formula is：
The calibration signal component obtains power unit according to the process that is calculated as below to the calibration signal DSHandled：
By the calibration signal DSCalibration pollution signal after over-sampling is expressed as y (n), the calibration pollution signal y
(n) difference equation met is：
d1[y(n-1)+y(n-3)]+d2Y (n-2)+[y (n)+y (n-4)]=0
The coefficient d of the difference equation1、d2Respectively：
d1=-2 (cos Ω21+cosΩ22)
d2=4cos Ω21 cosΩ22+2
Wherein Ω21And Ω22The respectively light absorption value and particle concentration of substrate standard liquid；
The coefficient expressions that the difference equation is obtained using energy operator and differential power operator are：
Wherein, Ψ [y (n)] is the energy operator of calibration pollution signal, and its expression formula is Ψ [y (n)]=y2(n)-y(n-
1)y(n+1)；
Υk[y (n)] is calibration pollution signal k rank discrete differential energy operators：Its expression formula is Υk[y (n)]=y (n) y
(n+k-2)-y(n-1)y(n+k-1)。
Two coefficient expressions of the simultaneous formula difference equation, obtain the light absorption value of substrate standard liquid and the table of particle concentration
It is up to formula：
The contaminated water flow index obtains power unit according to formula
Obtain contaminated water flow index r.
When the contaminated water flow index r is less than threshold value set in advance, the control module issues to the water pump 11
The control command of normal operation；When the contaminated water flow index r is more than or equal to threshold value set in advance, the control module to
The water pump 11 issues the control command for being switched to sewage disposal.
The present embodiment pumping plant failure detector can be detected in real time to water pump and motor, can effectively to water pump and
Motor carries out preventive protection, reduces the rate of breakdown of water pump and motor, extends the service life of motor and water pump, nothing
It need to manually be detected, reduce maintenance and replacement cost, be safeguarded simple and convenient.
The present embodiment carries out scene detection in real time using flow information of water acquisition module, and detection efficiency is high, real-time；This reality
It is simple for structure to apply the flow information of water acquisition module of example, it is workable, and optical system is easily integrated, stability of layout is good, into
This is low；The contaminated water flow index precision that the water flow data processing module of the present embodiment obtains is high, credible to the testing result of sewage
Degree is high.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of pumping plant failure detector, it is characterised in that including water pump, detection means and cistern, the water pump passes through
The detection means connects the cistern；The detection means includes：
Vibration detection device, for detecting the vibrating sensor output data in the water pump；
Pressure-detecting device, for detecting the pressure sensor output data in the water pump；
Water pump liquid level detector, for detecting the liquid level of the water pump；
Reservoir level detection device, for detecting the liquid level of the cistern；
Temperature-detecting device, for detecting the output data of the temperature sensor in the water pump；
Noise detection apparatus, for detecting the output data of the noise transducer in the water pump；
Control unit, described control unit connect the vibration detection device, the pressure-detecting device, the water pump liquid respectively
Position detection device, the reservoir level detection device, the temperature-detecting device and the noise detection apparatus.
2. pumping plant failure detector as claimed in claim 1, it is characterised in that the detection means also include alarm and
Data storage, the alarm and the data storage connect described control unit respectively.
3. pumping plant failure detector as claimed in claim 1 or 2, it is characterised in that the detection means also includes current
Information acquisition module, the flow information of water acquisition module include light source, the first fiber coupler, calibration sample pond, testing sample
Pond, the second fiber coupler and photodetector；The light source connects first fiber coupling by optical filter, convergent lens
The input of device；The output end of first fiber coupler connects institute by the calibration sample pond with testing sample pond respectively
State the input of the second fiber coupler, the calibration sample pond built with substrate standard liquid, the testing sample pond built with
Current sample to be measured；The photodetector receives the output end optical signal of second fiber coupler, by the optical signal
Electric signal is converted to, and the electric signal is sent to described control unit；The electric signal includes measured signal USAnd calibration
Signal DS。
4. pumping plant failure detector as claimed in claim 3, it is characterised in that described control unit is included at water flow data
Manage module and control module；The water flow data processing module is used for the measured signal USWith calibration signal DSHandled,
Contaminated water flow index is obtained, and the contaminated water flow index is sent to the control module；The control module is used for institute
State contaminated water flow index and threshold value set in advance is compared, and control command is issued to the water pump according to comparative result.
5. pumping plant failure detector as claimed in claim 4, it is characterised in that the water flow data processing module includes：
Measured signal component obtains power unit, for the measured signal USHandled, obtain the light absorption value of current sample to be measured
With particle concentration；
Calibration signal component obtains power unit, for the calibration signal DSHandled, obtain the light absorption value of substrate standard liquid with
Particle concentration；
Contaminated water flow index obtains power unit, for the light absorption value to the current sample to be measured and particle concentration and substrate standard liquid
Light absorption value compared with particle concentration, obtain contaminated water flow index.
6. pumping plant failure detector as claimed in claim 5, it is characterised in that the measured signal component obtains power unit root
According to the process that is calculated as below to the measured signal USHandled：
By the measured signal USPollution signal to be measured after over-sampling is expressed as x (n), and the pollution signal x (n) to be measured is full
Foot difference equation be：
c1[x(n-1)+x(n-3)]+c2X (n-2)+[x (n)+x (n-4)]=0
The coefficient c of the difference equation1、c2Respectively：
c1=-2 (cos Ω11+cosΩ12)
c2=4cos Ω11cosΩ12+2
Wherein Ω11And Ω12The light absorption value and particle concentration of current sample respectively to be measured；
The coefficient expressions that the difference equation is obtained using energy operator and differential power operator are：
Wherein, Ψ [x (n)] is the energy operator of pollution signal to be measured, and its expression formula is Ψ [x (n)]=x2(n)-x(n-1)x(n+
1)；
Υk[x (n)] is pollution signal k rank discrete differential energy operators to be measured：Its expression formula is Υk[x (n)]=x (n) x (n+k-
2)-x(n-1)x(n+k-1)；
Two coefficient expressions of the simultaneous formula difference equation, obtain the light absorption value of current sample to be measured and the expression of particle concentration
Formula is：
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7. pumping plant failure detector as claimed in claim 6, it is characterised in that the calibration signal component obtains power unit root
According to the process that is calculated as below to the calibration signal DSHandled：
By the calibration signal DSCalibration pollution signal after over-sampling is expressed as y (n), and the calibration pollution signal y (n) is full
Foot difference equation be：
d1[y(n-1)+y(n-3)]+d2Y (n-2)+[y (n)+y (n-4)]=0
The coefficient d of the difference equation1、d2Respectively：
d1=-2 (cos Ω21+cosΩ22)
d2=4cos Ω21cosΩ22+2
Wherein Ω21And Ω22The respectively light absorption value and particle concentration of substrate standard liquid；
The coefficient expressions that the difference equation is obtained using energy operator and differential power operator are：
Wherein, Ψ [y (n)] is the energy operator of calibration pollution signal, and its expression formula is Ψ [y (n)]=y2(n)-y(n-1)y(n+
1)；
Υk[y (n)] is calibration pollution signal k rank discrete differential energy operators：Its expression formula is Υk[y (n)]=y (n) y (n+k-
2)-y(n-1)y(n+k-1)。
Two coefficient expressions of the simultaneous formula difference equation, obtain the light absorption value of substrate standard liquid and the expression formula of particle concentration
For：
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8. pumping plant failure detector as claimed in claim 7, it is characterised in that the contaminated water flow index obtains power unit root
According to formula
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Obtain contaminated water flow index r.
9. pumping plant failure detector as claimed in claim 8, it is characterised in that be less than in the contaminated water flow index r pre-
During the threshold value first set, the control module issues the control command of normal operation to the water pump；The contaminated water flow index r
During more than or equal to threshold value set in advance, the control module issues the control life for being switched to sewage disposal to the water pump
Order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710660709.8A CN107504998A (en) | 2017-08-04 | 2017-08-04 | A kind of pumping plant failure detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710660709.8A CN107504998A (en) | 2017-08-04 | 2017-08-04 | A kind of pumping plant failure detector |
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| Publication Number | Publication Date |
|---|---|
| CN107504998A true CN107504998A (en) | 2017-12-22 |
Family
ID=60689513
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| CN201710660709.8A Pending CN107504998A (en) | 2017-08-04 | 2017-08-04 | A kind of pumping plant failure detector |
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| CN110439795A (en) * | 2019-08-14 | 2019-11-12 | 中铁隧道集团三处有限公司 | A kind of pump machine remote monitoring system |
| CN111288045A (en) * | 2020-03-20 | 2020-06-16 | 青岛中加特电气股份有限公司 | Control method for loading and unloading electromagnetic valve of pump station |
| CN113227720A (en) * | 2018-12-20 | 2021-08-06 | 孔斯贝格海运公司 | Ship environmental condition evaluation system and method |
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| CN113227720A (en) * | 2018-12-20 | 2021-08-06 | 孔斯贝格海运公司 | Ship environmental condition evaluation system and method |
| CN110439795A (en) * | 2019-08-14 | 2019-11-12 | 中铁隧道集团三处有限公司 | A kind of pump machine remote monitoring system |
| CN111288045A (en) * | 2020-03-20 | 2020-06-16 | 青岛中加特电气股份有限公司 | Control method for loading and unloading electromagnetic valve of pump station |
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