CN116699111A - Crude oil water content measurement system, device and method - Google Patents
Crude oil water content measurement system, device and method Download PDFInfo
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- CN116699111A CN116699111A CN202310983820.6A CN202310983820A CN116699111A CN 116699111 A CN116699111 A CN 116699111A CN 202310983820 A CN202310983820 A CN 202310983820A CN 116699111 A CN116699111 A CN 116699111A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 239000010779 crude oil Substances 0.000 title claims abstract description 45
- 238000005259 measurement Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 73
- 238000010438 heat treatment Methods 0.000 claims abstract description 71
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- 238000001514 detection method Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims abstract description 5
- 238000007781 pre-processing Methods 0.000 claims description 34
- 239000013643 reference control Substances 0.000 claims description 24
- 238000009529 body temperature measurement Methods 0.000 claims description 21
- 239000003921 oil Substances 0.000 claims description 17
- 238000000926 separation method Methods 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 2
- 238000000691 measurement method Methods 0.000 claims 2
- 230000003321 amplification Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 12
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
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- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 239000011259 mixed solution Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2823—Oils, i.e. hydrocarbon liquids raw oil, drilling fluid or polyphasic mixtures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Oils, i.e. hydrocarbon liquids specific substances contained in the oil or fuel
- G01N33/2847—Water in oil
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The application discloses a crude oil water content measurement system, a device and a method, wherein the system comprises: a multi-source sensor assembly comprising a plurality of sensor units of different functions, each sensor unit being adapted to acquire a detection signal inside the heating chamber; a signal processing module, the signal processing module comprising: the signal processing circuit is provided with a control circuit, a processing matrix, a multipath acquisition circuit and a signal amplification circuit; a signal shaping circuit; a digital-to-analog conversion circuit; an anti-interference circuit; the anti-interference circuit is connected with the digital-to-analog conversion circuit and the protection circuit, the protection circuit is connected with the main control module, and the main control module is connected with the upper computer through the communication unit; the multichannel analog signals are respectively transmitted to the main control module through the anti-interference circuit and the protection circuit, the main control module is connected to the upper computer, the upper computer settles through the multichannel analog signals to obtain the current water content, and the current water content is corrected to obtain the corrected water content.
Description
Technical Field
The application relates to the technical field of crude oil water content measurement, in particular to a crude oil water content measurement system, a device and a method.
Background
The dynamic testing method of the water content of crude oil is rapidly developed in oilfield production, a plurality of online testing instruments are developed at home and abroad, the labor intensity is reduced after the instruments are used, the production cost is saved, the testing speed and the testing precision are improved, and the automatic production level of the oilfield is increased by a new height. The dynamic test methods commonly used at present are as follows: electromagnetic wave method, density method, capacitance method, radio frequency capacitance method, etc.
Electromagnetic wave method: in recent years, the students tend to research the testing method of the water content of crude oil from the electromagnetic wave angle, and a great deal of research and study are carried out, and a lot of results are obtained. There are also a plurality of instruments for testing the water content of crude oil based on electromagnetic wave method in the market at present. According to different electromagnetic wave frequencies, electromagnetic waves used in the market at present mainly comprise: the method for testing the water content of the crude oil by microwaves, shortwaves and electromagnetic waves mainly comprises two main types, namely, testing the water content of the crude oil by the resonance technology of the electromagnetic waves; and secondly, the water content of the crude oil is tested by utilizing the absorption characteristic of the mixed medium to electromagnetic waves.
Short wave absorption method: the short wave absorption method is to radiate electric energy into a mixed medium in the form of electromagnetic waves, and the frequency range of the short wave absorption method is 3-30MHz. The electromagnetic wave and medium action of the short wave frequency section is mainly reflected on the absorption capacity, and the water content in the oil-water mixed solution is detected according to the difference of the oil-water two mediums on the short wave absorption capacity.
Microwave method: microwaves are high-frequency electromagnetic waves with the frequency range of about 300MHz-300GHz (the wavelength is 1 m-1 mm), and the transmission mainly relies on mutual induction of an alternating electric field and an alternating magnetic field. When the microwave passes through the dielectric medium, the dielectric medium is polarized, so that microwave energy is attenuated, and the change value of front-back attenuation can be tested to indirectly reflect some special properties of the substance when the microwave passes through the substance to be tested.
Density method: the density method is to test the water content of crude oil by utilizing the difference characteristics of oil and water densities, test the density of crude oil by a pressure sensor, and calculate the water content of crude oil by utilizing the relation between the water content of crude oil and the density of crude oil. The density method has the advantages of no influence caused by the change of the mixed liquid phase, low cost and convenient maintenance, but when the water content of the crude oil is low, the density of the oil is similar to that of the crude oil, so that the error of the water content test is increased, and the method is not suitable for the low water content test.
Problems of the prior art:
1) In the prior art, the water content in the oil is measured by relying on a manual mode, so that the labor cost is high, and the labor intensity is high;
2) The prior art has low adaptability to complex oil products, large detection error and low detection accuracy;
3) The measurement medium contains gas, which affects the measurement accuracy.
Disclosure of Invention
Accordingly, it is an object of the present application to provide a crude oil water content measurement system, apparatus and method.
The application provides a crude oil water content measurement system, which comprises:
a multi-source sensor assembly comprising a plurality of sensor units of different functions, each sensor unit being adapted to acquire a detection signal inside the heating chamber;
a signal processing module, the signal processing module comprising:
the signal processing circuit is provided with a control circuit, a processing matrix and a multi-channel acquisition circuit;
each acquisition circuit is correspondingly connected with one sensor unit, the multipath acquisition circuits are respectively and independently coupled to a control circuit and a processing matrix, the processing matrix is connected with the control circuit, and the control circuit is used for controlling the connection and disconnection between the acquisition circuits and the sensor units;
the processing matrix comprises a pre-processing unit and a plurality of parallel processing units, the pre-processing unit is connected to a thermistor arranged in the heating cavity through an acquisition circuit, a temperature measurement signal of the thermistor is obtained and transmitted to the pre-processing unit, the pre-processing unit is used for comparing the temperature measurement signal with a set threshold value after performing ADC (analog-to-digital converter) unit signal conversion, when the temperature measurement signal exceeds the set threshold value, the pre-processing unit generates a feedback signal and sends the feedback signal to a control circuit, the control circuit controls the connection between the acquisition circuit and the sensor unit based on the feedback signal, and the acquisition circuit starts to acquire detection signals of a plurality of sensor units with different functions;
the signal amplifying circuit is provided with a plurality of parallel amplifying units, each parallel amplifying unit is provided with a reference control part and an amplifier, the reference control part is correspondingly coupled with one parallel processing unit, the reference control part is used for comparing the acquired digital signal subjected to analog-digital conversion by the parallel processing unit with a plurality of set reference thresholds so as to acquire a reference threshold corresponding to the digital signal, and the reference control part is used for controlling the amplifier to amplify the digital signal to a set value based on the reference threshold;
the signal shaping circuit is provided with a plurality of parallel schmitt triggers, and each schmitt trigger is used for being correspondingly connected with a parallel amplifying unit and is used for carrying out signal arrangement on the amplified digital signals so as to reject abnormal signals;
the digital-to-analog conversion circuit is provided with a plurality of DAC units which are arranged in parallel, and each DAC unit is correspondingly connected with one schmitt trigger and is used for converting the shaped digital signals into analog signals;
the anti-interference circuit is connected with the digital-to-analog conversion circuit and the protection circuit, the protection circuit is connected with the main control module, and the main control module is connected with the upper computer through the communication unit;
the multichannel analog signals are respectively transmitted to the main control module through the anti-interference circuit and the protection circuit, the main control module is connected to the upper computer, the upper computer settles through the multichannel analog signals to obtain the current water content, and the current water content is corrected to obtain the corrected water content.
Further, the temperature compensation module and the pressure compensation module are arranged in the heating cavity and are connected with a plurality of sensor units with different functions, the temperature compensation module and the pressure compensation module are respectively connected with the main control module, the upper computer obtains compensation parameters according to the difference between the corrected water content and the current water content, the compensation parameters are sent to the main control module, and the main control module compensates the corresponding sensor units with different functions through the temperature compensation module and the pressure compensation module according to the compensation parameters.
The application also provides a crude oil water content measuring device, which comprises the crude oil water content measuring system, and comprises: a detector housing and an electrical housing disposed on the detector housing;
a heating cavity is arranged in the detector shell, a separation plate is arranged along the inner wall of the detector shell, a separation space is arranged between the separation plate and the heating cavity, and heating wires which are arranged close to the outer wall of the heating cavity are arranged in the separation space;
a plurality of sensor units with different functions and a compensation module are arranged in the heating cavity, the compensation module comprises a temperature compensation component and a pressure compensation component, and the temperature compensation component and the pressure compensation component are arranged in the heating cavity and are connected with the plurality of sensor units with different functions;
a miniature vacuum pump, a circuit board and a power supply module are arranged in the electric shell;
the air suction port of the miniature vacuum pump is connected with the heating cavity through a pipeline by an upper electromagnetic valve and an upper isolation cover, and the miniature vacuum pump and the circuit board are respectively connected with the power supply module;
a lower electromagnetic valve is arranged at the lower part of the heating cavity, and a suction pipe is arranged below the lower electromagnetic valve;
the circuit board is provided with a signal processing module, a signal shaping circuit, a digital-to-analog conversion circuit, an anti-interference circuit, a protection circuit and a main control module;
the signal processing module is provided with a control circuit, a processing matrix and a plurality of paths of acquisition circuits, wherein each acquisition circuit is correspondingly connected with one sensor unit, the plurality of paths of acquisition circuits are respectively and independently coupled to the control circuit and the processing matrix, the processing matrix is connected with the control circuit, the processing matrix is connected with the signal shaping circuit, the signal shaping circuit is connected with the digital-to-analog conversion circuit, the digital-to-analog conversion circuit is connected with the anti-interference circuit, the anti-interference circuit is connected with the protection circuit, the protection circuit is connected with the main control module, and the main control module is respectively and electrically connected with the upper computer, the micro vacuum pump and the heating wire;
the multichannel analog signals are respectively transmitted to a main control module through the anti-interference circuit and the protection circuit, the main control module is connected to an upper computer, the upper computer settles through the multichannel analog signals to obtain the current water content, and the current water content is corrected to obtain the corrected water content; the upper computer obtains compensation parameters according to the difference between the corrected water content and the current water content, the compensation parameters are sent to the main control module, and the main control module compensates a plurality of corresponding sensor units with different functions through the temperature compensation component and the pressure compensation component according to the compensation parameters.
Further, a support plate is provided on the inside of the electric housing, and the circuit board is provided on the support plate.
Further, an insulating partition plate is arranged in the electric shell, the insulating partition plate divides the interior of the electric shell into two chambers, the chamber adjacent to one side of the detector shell is used for arranging the micro vacuum pump and the circuit board, and the other chamber is used for arranging the power supply module.
Further, an exhaust hole is formed in the electric shell and is connected with an exhaust port of the micro vacuum pump through an exhaust pipe.
Further, the upper isolation cover is provided with a through hole, and the through hole is used for being connected with an air suction port of the micro vacuum pump through a pipeline.
Further, the processing matrix comprises a pre-processing unit and a plurality of parallel processing units, the pre-processing unit is used for being connected to a thermistor arranged in the heating cavity through a collecting circuit, acquiring a temperature measurement signal of the thermistor, transmitting the temperature measurement signal to the pre-processing unit, the pre-processing unit is used for comparing the temperature measurement signal with a set threshold value after performing ADC (analog-to-digital converter) signal conversion, when the temperature measurement signal exceeds the set threshold value, the pre-processing unit generates a feedback signal and sends the feedback signal to a control circuit, the control circuit controls the connection between the collecting circuit and the sensor unit based on the feedback signal, and the collecting circuit starts collecting detection signals of a plurality of sensor units with different functions;
the signal amplifying circuit is provided with a plurality of parallel amplifying units, each parallel amplifying unit is provided with a reference control part and an amplifier, the reference control part is correspondingly coupled with one parallel processing unit, the reference control part is used for comparing the acquired digital signal subjected to analog-digital conversion by the parallel processing unit with a plurality of set reference thresholds so as to acquire a reference threshold corresponding to the digital signal, and the reference control part is used for controlling the amplifier to amplify the digital signal to a set value based on the reference threshold;
the signal shaping circuit is provided with a plurality of parallel schmitt triggers, and each schmitt trigger is used for being correspondingly connected with a parallel amplifying unit and is used for carrying out signal arrangement on the amplified digital signals so as to reject abnormal signals;
the digital-to-analog conversion circuit is provided with a plurality of DAC units which are arranged in parallel, and each DAC unit is correspondingly connected with one schmitt trigger and is used for converting the shaped digital signals into analog signals.
The application also provides a crude oil water content measuring method, which comprises the following steps: step 1) inserting a crude oil water content measuring device into a measuring pipeline, and enabling a suction pipe to be completely immersed into oil liquid in the measuring pipeline;
step 2) connecting a power supply module with the micro vacuum pump and a main control module, wherein the main control module controls the opening of an upper electromagnetic valve, then controls the micro vacuum pump to work, vacuumizes the inside of a heating cavity, and simultaneously opens a lower electromagnetic valve;
step 3) the main control module controls the switch between the power supply module and the heating wire to be closed, and the power supply module is connected with the heating wire, at the moment, the main control module controls the thermistor arranged in the heating cavity to work, and controls the plurality of sensor units with different functions to be in an off state;
step 4) when the thermistor detects that the temperature inside the heating cavity reaches a set threshold value, the control circuit controls the connection between the acquisition circuit and the sensor units, and the acquisition circuit starts to acquire measurement parameters of a plurality of sensor units with different functions;
step 5), the measured parameters are transmitted to an upper computer through a main control module after being processed, and the upper computer obtains the current water content according to the current measured parameters;
and 6) correcting the current water content by the upper computer to obtain the corrected water content.
Further, the upper computer obtains compensation parameters according to the difference between the corrected water content and the current water content, the compensation parameters are sent to the main control module, and the main control module compensates a plurality of corresponding sensor units with different functions through the temperature compensation component and the pressure compensation component according to the compensation parameters.
The application provides a novel crude oil water content measuring system for simultaneously measuring a plurality of parameters, which avoids relying on a manual mode to perform an assay, reduces labor cost investment and labor intensity, integrates a plurality of sensor probes to form a composite sensor, improves the adaptability to different kinds of oil products, has the advantages of accurate measurement, stable operation and full-range measurement, and is convenient to install and maintain.
The sensor unit comprises sensor probes for measuring different signals, the adaptability to different kinds of oil products is improved, the sensor units are used for measuring measurement parameters in the oil products, the measurement parameters are transmitted to the main control unit to be processed, the processed parameters are transmitted to the upper computer to be analyzed, the water content of the oil products is obtained, the sensor units are compensated by the compensation unit, and the measurement accuracy is improved.
Drawings
FIG. 1 is a schematic diagram of the frame principle of the present application;
FIG. 2 is a schematic diagram of the structure of the present application;
fig. 3 is a flow chart of the method of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1:
referring to fig. 2, the present application provides a crude oil water content measuring apparatus comprising:
a probe housing 102 and an electrical housing 109 provided on the probe housing 102;
a heating cavity 105 is arranged in the detector shell 102, a separation plate is arranged along the inner wall of the detector shell 102, a separation space 103 is arranged between the separation plate and the heating cavity 105, and a heating wire 102 which is arranged close to the outer wall of the heating cavity 105 is arranged in the separation space 103;
a plurality of sensor units 106 with different functions and a compensation module are arranged in the heating cavity 105, and the compensation module comprises a temperature compensation component and a pressure compensation component which are arranged in the heating cavity 105 and are connected with the plurality of sensor units 106 with different functions;
a micro vacuum pump 110, a circuit board 112 and a power supply module 114 are arranged inside the electric housing 109;
the air suction port of the micro vacuum pump 110 is connected with the heating cavity 105 through a pipeline via the upper electromagnetic valve 108 and the upper isolation cover 107, and the micro vacuum pump 110 and the circuit board 112 are respectively connected with the power supply module 114;
a lower electromagnetic valve 104 is arranged at the lower part of the heating cavity 105, and a suction pipe 100 is arranged below the lower electromagnetic valve 104;
the circuit board 112 is provided with a signal processing module, a signal shaping circuit, a digital-to-analog conversion circuit, an anti-interference circuit, a protection circuit and a main control module;
the signal processing module is provided with a control circuit, a processing matrix and a plurality of paths of acquisition circuits, wherein each acquisition circuit is correspondingly connected with one sensor unit, the plurality of paths of acquisition circuits are respectively and independently coupled to the control circuit and the processing matrix, the processing matrix is connected with the control circuit, the processing matrix is connected with a signal shaping circuit, the signal shaping circuit is connected with a digital-to-analog conversion circuit, the digital-to-analog conversion circuit is connected with an anti-interference circuit, the anti-interference circuit is connected with a protection circuit, the protection circuit is connected with a main control module, and the main control module is respectively and electrically connected with an upper computer, a micro vacuum pump 110 and a heating wire;
the multichannel analog signals are respectively transmitted to a main control module through the anti-interference circuit and the protection circuit, the main control module is connected to an upper computer, the upper computer settles through the multichannel analog signals to obtain the current water content, and the current water content is corrected to obtain the corrected water content; the upper computer obtains compensation parameters according to the difference between the corrected water content and the current water content, the compensation parameters are sent to the main control module, and the main control module compensates a plurality of corresponding sensor units with different functions through the temperature compensation component and the pressure compensation component according to the compensation parameters.
In the present application, the heating chamber 105 is made of copper material, and the isolation plate is made of heat insulating material.
In the above, the support plate 111 is provided on the inside of the electric housing 109, and the circuit board 112 is provided on the support plate.
In the above, the inside of the electric housing 109 is provided with the insulating partition 113 dividing the inside of the electric housing 109 into two chambers, the chamber on the side immediately adjacent to the detector housing 102 being used for layout of the micro vacuum pump 110 and the circuit board 112, and the other chamber being used for layout of the power supply module.
In the above, the electric housing 109 is provided with a vent hole 115 connected to an exhaust port of the micro vacuum pump 110 through an exhaust pipe.
In the above description, the upper shield 107 is provided with a through hole for connection with the suction port of the micro vacuum pump 110 through a pipe.
In the above, the processing matrix includes a pre-processing unit and a plurality of parallel processing units, the pre-processing unit is connected to a thermistor disposed in the heating cavity 105 through an acquisition circuit, acquires a temperature measurement signal of the thermistor, and transmits the temperature measurement signal to the pre-processing unit, the pre-processing unit is used for comparing the temperature measurement signal with a set threshold value after performing ADC unit signal conversion, when the temperature measurement signal exceeds the set threshold value, the pre-processing unit generates a feedback signal and sends the feedback signal to a control circuit, the control circuit controls connection between the acquisition circuit and the sensor unit based on the feedback signal, and the acquisition circuit starts to acquire detection signals of a plurality of sensor units with different functions;
the signal amplifying circuit is provided with a plurality of parallel amplifying units, each parallel amplifying unit is provided with a reference control part and an amplifier, the reference control part is correspondingly coupled with one parallel processing unit, the reference control part is used for comparing the acquired digital signal subjected to analog-digital conversion by the parallel processing unit with a plurality of set reference thresholds so as to acquire a reference threshold corresponding to the digital signal, and the reference control part is used for controlling the amplifier to amplify the digital signal to a set value based on the reference threshold;
the signal shaping circuit is provided with a plurality of parallel schmitt triggers, and each schmitt trigger is used for being correspondingly connected with a parallel amplifying unit and is used for carrying out signal arrangement on the amplified digital signals so as to reject abnormal signals;
the digital-to-analog conversion circuit is provided with a plurality of DAC units which are arranged in parallel, and each DAC unit is correspondingly connected with one schmitt trigger and is used for converting the shaped digital signals into analog signals.
The principle of the application is as follows: inserting the crude oil water content measuring device of the present application into the measuring pipe, and completely immersing the suction pipe 100 in the oil of the measuring pipe; the power supply module is connected with the micro vacuum pump 110 and the main control module, the main control module controls the upper electromagnetic valve 108 to be opened, then controls the micro vacuum pump 110 to work, vacuumizes the interior of the heating cavity 105, simultaneously opens the lower electromagnetic valve 104, and as the heating cavity 105 is in a negative pressure state relative to the measuring pipeline, oil in the measuring pipeline is sucked into the heating cavity 105 through the suction pipe 100, and after the oil reaches a set height in the heating cavity 105, the main control module controls the micro vacuum pump 110 to stop working, and simultaneously closes the upper electromagnetic valve 108 and the lower electromagnetic valve 104; the main control module controls the switch between the power supply module and the heating wire to be closed, and the power supply module is connected with the heating wire, at the moment, the main control module controls the thermistor arranged in the heating cavity 105 to work, and controls the plurality of sensor units with different functions to be in an off state; when the thermistor detects that the temperature inside the heating cavity 105 reaches a set threshold, the control circuit controls the connection between the acquisition circuit and the sensor units, and the acquisition circuit starts to acquire measurement parameters of the sensor units with different functions, wherein the measurement parameters comprise heat conductivity, heat capacity ratio, temperature parameters and pressure parameters, the temperature parameters are directly measured by the thermistor, and the heat conductivity, the heat capacity ratio and the pressure parameters are respectively detected by the heat conductivity sensor, the heat capacity ratio sensor and the pressure sensor. In the present application, the heating chamber 105 is heated at a known and constant rate and the temperature rise is recorded. The magnitude of the temperature rise is a function of the heating time and the thermal conductivity of the oil water. By plotting the logarithm of the temperature with respect to time, the change in thermal conductivity of the measured substance can be obtained, and the change in thermal conductivity can be converted into the water content. The specific heat capacity of the crude oil is 1800-2100J/(kg.K), the specific heat capacity of water is 4200J/(kg.K), the medium in the pipeline is introduced into the fixed container for heating, the time of heating and fixing temperature rise is recorded, and the water content is calculated according to the difference of the specific heat capacities of the crude oil and the water.
In the application, the temperature is an visual index, so that when the corresponding circuit is designed, for example, the application is provided with a pre-processing unit and a plurality of parallel processing units in a processing matrix, wherein the pre-processing unit is used for collecting temperature signals, and the plurality of parallel processing units are used for respectively collecting heat conductivity, heat capacity ratio and pressure signals; the main control module is also used for synchronously uploading the corresponding acquired temperature signals according to the heat conductivity, the heat capacity ratio and the pressure signals uploaded to the upper computer.
In addition, the upper computer settles through the multipath analog signals to obtain the current water content, and corrects the current water content to obtain the corrected water content; the upper computer obtains compensation parameters according to the difference between the corrected water content and the current water content, the compensation parameters are sent to the main control module, and the main control module compensates a plurality of corresponding sensor units with different functions through the temperature compensation component and the pressure compensation component according to the compensation parameters.
Example 2:
referring to FIG. 1, the present application discloses a crude oil water content measurement system, comprising:
a multisource sensor assembly comprising a plurality of functionally distinct sensor units, each sensor unit for acquiring a detection signal inside the heating chamber 105;
a signal processing module, the signal processing module comprising:
the signal processing circuit is provided with a control circuit, a processing matrix and a multi-channel acquisition circuit;
each acquisition circuit is correspondingly connected with one sensor unit, the multipath acquisition circuits are respectively and independently coupled to a control circuit and a processing matrix, the processing matrix is connected with the control circuit, and the control circuit is used for controlling the connection and disconnection between the acquisition circuits and the sensor units;
the processing matrix comprises a pre-processing unit and a plurality of parallel processing units, the pre-processing unit is used for being connected to a thermistor arranged in the heating cavity 105 through an acquisition circuit, acquiring a temperature measurement signal of the thermistor, transmitting the temperature measurement signal to the pre-processing unit, the pre-processing unit is used for comparing the temperature measurement signal with a set threshold value after performing ADC (analog-to-digital converter) unit signal conversion, when the temperature measurement signal exceeds the set threshold value, the pre-processing unit generates a feedback signal and sends the feedback signal to a control circuit, the control circuit controls the connection between the acquisition circuit and the sensor unit based on the feedback signal, and the acquisition circuit starts to acquire detection signals of a plurality of sensor units with different functions;
the signal amplifying circuit is provided with a plurality of parallel amplifying units, each parallel amplifying unit is provided with a reference control part and an amplifier, the reference control part is correspondingly coupled with one parallel processing unit, the reference control part is used for comparing the acquired digital signal subjected to analog-digital conversion by the parallel processing unit with a plurality of set reference thresholds so as to acquire a reference threshold corresponding to the digital signal, and the reference control part is used for controlling the amplifier to amplify the digital signal to a set value based on the reference threshold;
the signal shaping circuit is provided with a plurality of parallel schmitt triggers, and each schmitt trigger is used for being correspondingly connected with a parallel amplifying unit and is used for carrying out signal arrangement on the amplified digital signals so as to reject abnormal signals;
the digital-to-analog conversion circuit is provided with a plurality of DAC units which are arranged in parallel, and each DAC unit is correspondingly connected with one schmitt trigger and is used for converting the shaped digital signals into analog signals;
the anti-interference circuit is connected with the digital-to-analog conversion circuit and the protection circuit, the protection circuit is connected with the main control module, and the main control module is connected with the upper computer through the communication unit;
the multichannel analog signals are respectively transmitted to the main control module through the anti-interference circuit and the protection circuit, the main control module is connected to the upper computer, the upper computer settles through the multichannel analog signals to obtain the current water content, and the current water content is corrected to obtain the corrected water content.
Further, the system further comprises a compensation module, the compensation module is provided with a temperature compensation component and a pressure compensation component, the temperature compensation component and the pressure compensation component are arranged in the heating cavity 105 and are connected with a plurality of sensor units with different functions, the temperature compensation component and the pressure compensation component are respectively connected with the main control module, the upper computer obtains compensation parameters according to the difference between the corrected water content and the current water content, the compensation parameters are sent to the main control module, and the main control module compensates the corresponding sensor units with different functions through the temperature compensation component and the pressure compensation component according to the compensation parameters.
In the above, the sensor unit includes a thermal conductivity sensor, a heat capacity ratio sensor, a temperature sensor, a pressure sensor and a signal processing module, where the thermal conductivity sensor, the heat capacity ratio sensor, the temperature sensor and the pressure sensor are all electrically connected with the signal processing module, and the signal processing module is in communication connection with the main control unit.
In the application, the temperature is an visual index, so that when the corresponding circuit is designed, for example, the application is provided with a pre-processing unit and a plurality of parallel processing units in a processing matrix, wherein the pre-processing unit is used for collecting temperature signals, and the plurality of parallel processing units are used for respectively collecting heat conductivity, heat capacity ratio and pressure signals; the main control module is also used for synchronously uploading the corresponding acquired temperature signals according to the heat conductivity, the heat capacity ratio and the pressure signals uploaded to the upper computer.
Example 3:
referring to fig. 3, the application also provides a crude oil water content measuring method, which comprises the following steps:
step 1) inserting a crude oil water content measuring device into a measuring pipeline, and enabling the suction pipe 100 to be completely immersed in oil in the measuring pipeline;
step 2) connecting a power supply module with the micro vacuum pump 110 and a main control module, wherein the main control module controls the upper electromagnetic valve 108 to be opened, then controls the micro vacuum pump 110 to work, vacuumizes the interior of the heating cavity 105, simultaneously opens the lower electromagnetic valve 104, and as the heating cavity 105 is in a negative pressure state relative to the measuring pipeline, oil in the measuring pipeline is sucked into the heating cavity 105 through the suction pipe 100, and after the oil reaches a set height in the heating cavity 105, the main control module controls the micro vacuum pump 110 to stop working, and simultaneously closes the upper electromagnetic valve 108 and the lower electromagnetic valve 104;
step 3), the main control module controls a switch between the power supply module and the heating wire to be closed, and the power supply module is connected with the heating wire, at the moment, the main control module controls a thermistor arranged in the heating cavity 105 to work, and controls a plurality of sensor units with different functions to be in an off state;
step 4) when the thermistor detects that the temperature inside the heating cavity 105 reaches a set threshold value, the control circuit controls the connection between the acquisition circuit and the sensor units, and the acquisition circuit starts to acquire measurement parameters of a plurality of sensor units with different functions;
step 5), the measured parameters are transmitted to an upper computer through a main control module after being processed, and the upper computer obtains the current water content according to the current measured parameters;
and 6) correcting the current water content by the upper computer to obtain the corrected water content.
Further, the upper computer obtains compensation parameters according to the difference between the corrected water content and the current water content, the compensation parameters are sent to the main control module, and the main control module compensates a plurality of corresponding sensor units with different functions through the temperature compensation component and the pressure compensation component according to the compensation parameters.
In step 6, the current water content is corrected using a kalman filter algorithm.
Further, the formula of the kalman filter algorithm includes:
the Kalman filter time update formula is:in (1) the->Respectively->Time and->Estimating the water content in a time posterior state; />Is->Estimating the water content in a priori state at the moment; />Respectively->Time and->Estimating covariance by posterior of time; />Is->Estimating covariance a priori at a moment; />Is a state transition matrix; />A matrix for converting an input into a state; />Exciting a noise covariance for the process; />Is the influence coefficient of external factors (such as gas, impurities and the like) on the water content.
The Kalman filter state update formula is:in (1) the->Is a filtering gain matrix; />A conversion matrix for the state variables to the measurements; />To measure noise covariance; />Is an input measured value, namely a measured parameter; />Residual errors of actual observation and predicted observation; />Is an identity matrix.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A crude oil water content measurement system, comprising:
a multi-source sensor assembly comprising a plurality of sensor units of different functions, each sensor unit being adapted to acquire a detection signal inside the heating chamber;
a signal processing module, the signal processing module comprising:
the signal processing circuit is provided with a control circuit, a processing matrix and a multi-channel acquisition circuit;
each acquisition circuit is correspondingly connected with one sensor unit, the multipath acquisition circuits are respectively and independently coupled to a control circuit and a processing matrix, the processing matrix is connected with the control circuit, and the control circuit is used for controlling the connection and disconnection between the acquisition circuits and the sensor units;
the processing matrix comprises a pre-processing unit and a plurality of parallel processing units, the pre-processing unit is connected to a thermistor arranged in the heating cavity through an acquisition circuit, a temperature measurement signal of the thermistor is obtained and transmitted to the pre-processing unit, the pre-processing unit is used for comparing the temperature measurement signal with a set threshold value after performing ADC (analog-to-digital converter) unit signal conversion, when the temperature measurement signal exceeds the set threshold value, the pre-processing unit generates a feedback signal and sends the feedback signal to a control circuit, the control circuit controls the connection between the acquisition circuit and the sensor unit based on the feedback signal, and the acquisition circuit starts to acquire detection signals of a plurality of sensor units with different functions;
the signal amplifying circuit is provided with a plurality of parallel amplifying units, each parallel amplifying unit is provided with a reference control part and an amplifier, the reference control part is correspondingly coupled with one parallel processing unit, the reference control part is used for comparing the acquired digital signal subjected to analog-digital conversion by the parallel processing unit with a plurality of set reference thresholds so as to acquire a reference threshold corresponding to the digital signal, and the reference control part is used for controlling the amplifier to amplify the digital signal to a set value based on the reference threshold;
the signal shaping circuit is provided with a plurality of parallel schmitt triggers, and each schmitt trigger is used for being correspondingly connected with a parallel amplifying unit and is used for carrying out signal arrangement on the amplified digital signals so as to reject abnormal signals;
the digital-to-analog conversion circuit is provided with a plurality of DAC units which are arranged in parallel, and each DAC unit is correspondingly connected with one schmitt trigger and is used for converting the shaped digital signals into analog signals;
the anti-interference circuit is connected with the digital-to-analog conversion circuit and the protection circuit, the protection circuit is connected with the main control module, and the main control module is connected with the upper computer through the communication unit;
the multichannel analog signals are respectively transmitted to the main control module through the anti-interference circuit and the protection circuit, the main control module is connected to the upper computer, the upper computer settles through the multichannel analog signals to obtain the current water content, and the current water content is corrected to obtain the corrected water content.
2. The crude oil water content measurement system according to claim 1, further comprising a compensation module, wherein the compensation module is provided with a temperature compensation component and a pressure compensation component, the temperature compensation component and the pressure compensation component are arranged in the heating cavity and are connected with a plurality of sensor units with different functions, the temperature compensation component and the pressure compensation component are respectively connected with a main control module, an upper computer obtains compensation parameters according to the difference between the corrected water content and the current water content, the compensation parameters are sent to the main control module, and the main control module compensates the corresponding plurality of sensor units with different functions through the temperature compensation component and the pressure compensation component according to the compensation parameters.
3. A crude oil water content measuring device comprising the crude oil water content measuring system according to any one of claims 1 to 2, characterized by comprising:
a detector housing and an electrical housing disposed on the detector housing;
a heating cavity is arranged in the detector shell, a separation plate is arranged along the inner wall of the detector shell, a separation space is arranged between the separation plate and the heating cavity, and heating wires which are arranged close to the outer wall of the heating cavity are arranged in the separation space;
a plurality of sensor units with different functions and a compensation module are arranged in the heating cavity, the compensation module comprises a temperature compensation component and a pressure compensation component, and the temperature compensation component and the pressure compensation component are arranged in the heating cavity and are connected with the plurality of sensor units with different functions;
a miniature vacuum pump, a circuit board and a power supply module are arranged in the electric shell;
the air suction port of the miniature vacuum pump is connected with the heating cavity through a pipeline by an upper electromagnetic valve and an upper isolation cover, and the miniature vacuum pump and the circuit board are respectively connected with the power supply module;
a lower electromagnetic valve is arranged at the lower part of the heating cavity, and a suction pipe is arranged below the lower electromagnetic valve;
the circuit board is provided with a signal processing module, a signal shaping circuit, a digital-to-analog conversion circuit, an anti-interference circuit, a protection circuit and a main control module;
the signal processing module is provided with a control circuit, a processing matrix and a plurality of paths of acquisition circuits, wherein each acquisition circuit is correspondingly connected with one sensor unit, the plurality of paths of acquisition circuits are respectively and independently coupled to the control circuit and the processing matrix, the processing matrix is connected with the control circuit, the processing matrix is connected with a signal shaping circuit, the signal shaping circuit is connected with a digital-to-analog conversion circuit, the digital-to-analog conversion circuit is connected with an anti-interference circuit, the anti-interference circuit is connected with a protection circuit, the protection circuit is connected with a main control module, and the main control module is respectively and electrically connected with an upper computer, a micro vacuum pump and a heating wire;
the multichannel analog signals are respectively transmitted to a main control module through the anti-interference circuit and the protection circuit, the main control module is connected to an upper computer, the upper computer settles through the multichannel analog signals to obtain the current water content, and the current water content is corrected to obtain the corrected water content; the upper computer obtains compensation parameters according to the difference between the corrected water content and the current water content, the compensation parameters are sent to the main control module, and the main control module compensates a plurality of corresponding sensor units with different functions through the temperature compensation component and the pressure compensation component according to the compensation parameters.
4. A crude oil water content measuring device as set forth in claim 3, wherein a support plate is provided on an interior of said electrical housing, said circuit board being provided on the support plate.
5. A crude oil water content measuring device according to claim 3, wherein an insulating partition is provided inside the electrical housing, the insulating partition dividing the interior of the electrical housing into two chambers, the chamber immediately adjacent to the side of the detector housing being used for the layout of the micro vacuum pump and the circuit board, the other chamber being used for the layout of the power supply module.
6. A crude oil water content measuring device as set forth in claim 3, wherein a vent hole is provided on the electrical housing, and the vent hole is connected with a vent hole of the micro vacuum pump through a vent pipe.
7. A crude oil water content measuring device as set forth in claim 3, wherein a through hole is provided on the upper separator for connection with the suction port of the micro vacuum pump through a pipe.
8. The crude oil water content measuring device according to claim 3, wherein the processing matrix comprises a pre-processing unit and a plurality of parallel processing units, the pre-processing unit is used for being connected to a thermistor arranged in the heating cavity through an acquisition circuit, acquiring a temperature measurement signal of the thermistor, transmitting the temperature measurement signal to the pre-processing unit, the pre-processing unit is used for comparing the temperature measurement signal after performing ADC unit signal conversion with a set threshold value, when the set threshold value is exceeded, the pre-processing unit generates a feedback signal and sends the feedback signal to a control circuit, the control circuit controls connection between the acquisition circuit and the sensor unit based on the feedback signal, and the acquisition circuit starts acquiring detection signals of a plurality of sensor units with different functions;
the signal amplifying circuit is provided with a plurality of parallel amplifying units, each parallel amplifying unit is provided with a reference control part and an amplifier, the reference control part is correspondingly coupled with one parallel processing unit, the reference control part is used for comparing the acquired digital signal subjected to analog-digital conversion by the parallel processing unit with a plurality of set reference thresholds so as to acquire a reference threshold corresponding to the digital signal, and the reference control part is used for controlling the amplifier to amplify the digital signal to a set value based on the reference threshold;
the signal shaping circuit is provided with a plurality of parallel schmitt triggers, and each schmitt trigger is used for being correspondingly connected with a parallel amplifying unit and is used for carrying out signal arrangement on the amplified digital signals so as to reject abnormal signals;
the digital-to-analog conversion circuit is provided with a plurality of DAC units which are arranged in parallel, and each DAC unit is correspondingly connected with one schmitt trigger and is used for converting the shaped digital signals into analog signals.
9. A crude oil water content measurement method comprising any one of the crude oil water content measurement apparatuses according to claims 3 to 8, characterized by comprising the steps of:
step 1) inserting a crude oil water content measuring device into a measuring pipeline, and enabling a suction pipe to be completely immersed into oil liquid in the measuring pipeline;
step 2) connecting a power supply module with the micro vacuum pump and a main control module, wherein the main control module controls the opening of an upper electromagnetic valve, then controls the micro vacuum pump to work, vacuumizes the inside of a heating cavity, and simultaneously opens a lower electromagnetic valve;
step 3) the main control module controls the switch between the power supply module and the heating wire to be closed, and the power supply module is connected with the heating wire, at the moment, the main control module controls the thermistor arranged in the heating cavity to work, and controls the plurality of sensor units with different functions to be in an off state;
step 4) when the thermistor detects that the temperature inside the heating cavity reaches a set threshold value, the control circuit controls the connection between the acquisition circuit and the sensor units, and the acquisition circuit starts to acquire measurement parameters of a plurality of sensor units with different functions;
step 5), after the measured parameters are processed, the processed measured parameters are transmitted to an upper computer through a main control module, and the upper computer obtains the current water content according to the current measured parameters;
and 6) correcting the current water content by the upper computer to obtain the corrected water content.
10. The crude oil water content measurement method according to claim 9, wherein the upper computer obtains compensation parameters according to the difference value between the corrected water content and the current water content, the compensation parameters are sent to a main control module, and the main control module compensates a plurality of corresponding sensor units with different functions through a temperature compensation component and a pressure compensation component according to the compensation parameters.
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