CN101685057B - Non-contact solution concentration detection method and device thereof - Google Patents

Non-contact solution concentration detection method and device thereof Download PDF

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Publication number
CN101685057B
CN101685057B CN2008102007048A CN200810200704A CN101685057B CN 101685057 B CN101685057 B CN 101685057B CN 2008102007048 A CN2008102007048 A CN 2008102007048A CN 200810200704 A CN200810200704 A CN 200810200704A CN 101685057 B CN101685057 B CN 101685057B
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China
Prior art keywords
solution
curve
colour code
solvent
quality
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Expired - Fee Related
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CN2008102007048A
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Chinese (zh)
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CN101685057A (en
Inventor
杜毅铭
刘茂生
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
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Priority to CN2008102007048A priority Critical patent/CN101685057B/en
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Abstract

The invention discloses a non-contact solution concentration detection method and a device thereof. The invention adopts an electronic scale to weigh solution in a container, wherein solution comprises solvent and solute; solution quality data are read; then, liquid level of solution in the container is detected, the obtained quality and a colour code paint solution height value are transmitted to a signal processor, the processor processes received quality and the colour code height value to form a colour code solution curve and produce a standard solution curve, and the standard solution curve is stored in the processor; then, liquid level detection is repeated, the obtained colour code solution curve is compared with the standard solution curve; once the obtained colour code solution curve deviates from the set value tolerance of the standard solution curve, the signal processor calculates corresponding solvent volatilization amount and sends out signals, and supplementary solvent is filled into the colour code solution; at the moment, the electronic scale and the liquid level detector detect quality and height values all the time; the processor updates the concentration curve of the colour code solution in real time; and solvent stops to supplement until the detected curve is coincident with the standard solution curve.

Description

A kind of non-contact solution concentration detection method and device thereof
Technical field
The present invention relates to the concentration detection technique, particularly a kind of non-contact solution concentration detection method and device thereof.
Background technology
According to the regulation of American Petroleum Institute (API), all must indicate the colour code lacquer of representative products steel grade on each root petroleum pipeline of this member enterprise of association.Pipe mill as this member enterprise needs the steel grade of steel pipe is carried out colour code in the steel pipe's production process, the solution that this colour code adopts coating and paint solvent to form is by the sign of colour circle spray equipment at a colour code lacquer of steel tube surface spraying conduct identification steel grade.The concentration of sign coating has standard to determine that excessive concentration can increase the consumption of coating, and causes the spray nozzle clogging spill tag of spray equipment to know easily, and it is unclear that concentration is crossed the low sign that then may cause, and influences product quality.
The production scene adopts the method for funnel+stopwatch to measure coating concentration in order to control colour code lacquer concentration.Its concrete grammar is: will pour special funnel into as the coating that detects sample, and detect the number that drips that coating drips in the funnel in the unit interval.Determine solution concentration according to the number that drips in the unit interval.
This detection method is adopted for a long time because do not need checkout equipment.But along with the development of Baosteel, this product line workload increases year by year, and the colour code color requires also progressively to improve.Original detection method is because of its offline inspection, slow, the complicated operation of detection speed, and colour code lacquer concentration control accuracy is low, can not adapt to the demand of production scene.
Summary of the invention
The objective of the invention is to design a kind of non-contact solution concentration detection method and device thereof, improve accuracy of detection, guarantee product quality; Realize online detection, online concentration abnormality is reported to the police, and strengthens producing the controllability that monitors; Reduce labor intensity of operating personnel.
For achieving the above object, technical scheme of the present invention is,
A kind of non-contact solution concentration detection method carries out concentration to the solution in the container and detects, and it comprises the steps:
1) at first, adopt electronic scale that the solution in the container is weighed, this solution comprises solvent, solute; Read the solution quality data;
2) Level Detection, the liquid level of solution in the detection receptacle, and give signal processor with the quality and the colour code lacquer solution height value that record by signal wire transmits respectively, signal processor is handled the quality and the colour code height value that receive, form colour code solution curve, and production standard solution curve, this standard solution curve is stored in the processor;
3) repeat Level Detection, the standard solution curve that stores in the colour code solution curve that obtains and the processor is compared, in case depart from standard solution curve setting value tolerance, then signal processor calculates the corresponding solvent volatile quantity, just send the signal of opening solenoid valve, make solvent from solvent tonic jar, inject colour code solution by conduit, stirrer work simultaneously, solution is mixed, this moment, electronic scale and liquid level detector detected quality and height value constantly, signal processor carries out real-time update to colour code solution concentration curve, when detection curve is consistent with the standard solution curve, signal processor just disconnects solenoid valve, stops the solvent supply, replenishes thereby finish automatically.
The situation that the solution concentration that the inventive method causes with solvent evaporates at the production scene solution concentration changes breaks through and is used to have method of thinking to adopt physical method to utilize the method for the relative difference relation of solution concentration to detect solution concentration.In specific working environment, can record the concentration of solution fast, easily.
Its principle is as follows:
The solute of unit volume and solvent are because bigger of poor quality of the different existence of density, this solution concentration difference prepared of directly causing of poor quality, variation has taken place in the ratio that is solute and solvent, when the concentration of solution of configuration when density changes along with solvent evaporates, find this variation by means, and in time report to the police and automatic replenishing, change the harmful effect that causes production technology thereby eliminate solution density.
1) configuration standard solution (solvent+solute) as required.
2) according to density formula: density=mass/volume draws the curve of configuration standard solution.
Density=(solvent quality+solute quality)/liquor capacity
As not volatilization of solution, then density is constant, and the container bottom area be necessarily,
Formula is converted into: constant=quality/highly
As: density 1 and density 2 etc.
Aborning, because the volatilization of solvent, make the density of the solution in the container that variation take place, be that quality/aspect ratio has departed from typical curve, compare the solution of same quality with standard solution, the liquid level of density 1 has departed from calibrated altitude in container, highly reduces.Same principle also can be investigated the variation of quality.During this time, the solute volatile quantity is seldom generally ignored.
Rule of thumb, set minimum and depart from height (or quality) and monitoring, report to the police.
A kind of non-contact solution concentration pick-up unit of the present invention, it comprises, base is established protective cover on it; Electronic scale is arranged on the base; Container is arranged on the electronic scale, connects the conduit and the corresponding solenoid valve of establishing a connection solvent tonic jar on it; Stirrer is arranged in the container; Liquid level detector is arranged in the container; Signal processor electrically connects electronic scale, liquid level detector, solenoid valve respectively.
Further, described liquid level detector is a ultrasonic meter; This liquid level detector can be other forms also, as liquid level sensor is set, relative Level Detection of photo-electric or the like.
According to weighing and the data that draw of level gauging,, the quality/aspect ratio that detects and the quality/aspect ratio of standard are compared by Computer Processing.Remind the operator by picture and speech form immediately in case find super scope.
For guaranteeing working properly carrying out, fully merge to guarantee solvent and solute in the solution as in container, settling regularly stirrer.
Adopt high-precision electronic weighing device to read the solution quality data, adopt supersonic liquid level to detect the liquid level that meter detects solution, and give signal processor (industrial computer etc.) with the quality and the colour code lacquer solution height value that record by signal wire transmits respectively, signal processor is handled the quality and the colour code height value that receive, form colour code solution curve, and with processor in the standard solution curve that is stored in compare, in case depart from standard solution curve setting value tolerance, then signal processor calculates the corresponding solvent volatile quantity, just send the signal of opening solenoid valve, make solvent from solvent tonic jar, slowly inject colour code solution by conduit, stirrer work simultaneously, solution is mixed, and this moment, electronic scale and ultrasonic solution bit detector detected quality and height value constantly, real renewal when signal processor carries out colour code solution concentration curve, when detection curve is consistent with typical curve, signal processor just disconnects solenoid valve, stops the solvent supply, thereby finishes automatic supplementary functions.
Beneficial effect of the present invention
1. improved the accuracy of detection of solvent strength, provide help for promoting product quality.
2. improved the execution degree of operating personnel to production process monitoring.
3. reduced operating personnel's working strength.
4. adopt non-contact detecting technology, the pollution of having avoided the solvent contact detectable concentration to bring.
5. easily concentration change surpasses behind the setting range supply solvent automatically, avoids equipment downtime.
Description of drawings
Fig. 1 is the structural representation of non-contact solution concentration pick-up unit of the present invention.
Fig. 2 is the schematic diagram of non-contact solution concentration detection method of the present invention.
Embodiment
Referring to Fig. 1, non-contact solution concentration pick-up unit of the present invention, it comprises that base 1 is established protective cover 2 on it; Electronic scale 3 is arranged on the base 1; Container 4 is arranged on the electronic scale 3, connects the conduit 5 and the corresponding solenoid valve of establishing a connection solvent tonic jar on it; Stirrer 6 is arranged in the container 4; Liquid level detector 7 is arranged in the container 4, is ultrasonic meter in the present embodiment; Signal processor 8 electrically connects electronic scale 3, liquid level detector 7, solenoid valve respectively.
See also Fig. 2 again, non-contact solution concentration detection method of the present invention carries out concentration to the solution 10 in the container 4 and detects, and at first, adopts the solution 10 in 3 pairs of containers of electronic scale 4 to weigh, and this solution comprises solvent, solute; Read the solution quality data; Then, Level Detection, the liquid level of solution 10 in the detection receptacle 4, and give signal processor 8 with the quality and the colour code lacquer solution height value that record by signal wire transmits respectively, 8 pairs of quality that receive of signal processor and colour code height value are handled, form colour code solution curve, and production standard solution curve, this standard solution curve is stored in the processor; Then, repeat Level Detection, the standard solution curve that stores in the colour code solution curve that obtains and the signal processor 8 is compared, in case depart from standard solution curve setting value tolerance, then signal processor 8 calculates the corresponding solvent volatile quantity, just send the signal of opening solenoid valve, make solvent from solvent tonic jar, slowly inject colour code solution by conduit 5, stirrer 6 work simultaneously, solution is mixed, this moment, electronic scale and liquid level detector detected quality and height value constantly, signal processor carries out real-time update to colour code solution concentration curve, and when detection curve was consistent with the standard solution curve, signal processor 8 just disconnected solenoid valve, stop the solvent supply, thereby finish automatic supplementary functions.
Aborning, because the volatilization of solvent, make the density of the solution in the container that variation take place, be that quality/aspect ratio has departed from typical curve, as shown in Figure 2, compare the solution of same quality with standard solution, the liquid level of density 1 has departed from calibrated altitude in container, changes to h from H.Same principle also can be investigated the variation of quality.

Claims (3)

1. a non-contact solution concentration detection method that is used to detect colour code lacquer solution concentration carries out concentration to the solution in the container and detects, and it comprises the steps:
1) at first, adopt electronic scale that the solution in the container is weighed, this solution comprises solvent, solute; Read the solution quality data;
2) Level Detection, the liquid level of solution in the detection receptacle, and respectively quality and the colour code lacquer solution height value that records is transferred to signal processor, signal processor is handled the quality and the colour code lacquer solution height value that receive, form colour code solution concentration curve, and production standard solution curve, this standard solution curve is stored in the processor;
3) repeat Level Detection, the standard solution curve that stores in the colour code solution concentration curve that obtains and the processor is compared, in case depart from standard solution curve setting value tolerance, then signal processor calculates the corresponding solvent volatile quantity, just send the signal of opening solenoid valve, make solvent from solvent tonic jar, inject colour code lacquer solution by conduit, stirrer work simultaneously, solution is mixed, this moment, electronic scale and liquid level detector detected quality and height value constantly, signal processor carries out real-time update to colour code solution concentration curve, when detection curve is consistent with the standard solution curve, signal processor just disconnects solenoid valve, stops the solvent supply, replenishes thereby finish automatically.
2. a non-contact solution concentration pick-up unit is characterized in that, comprise,
Base is established protective cover on it;
Electronic scale is arranged at base soil;
Container is arranged on the electronic scale, connects the conduit and the corresponding solenoid valve of establishing a connection solvent tonic jar on it;
Stirrer is arranged in the container;
Liquid level detector is arranged in the container;
Signal processor electrically connects electronic scale, liquid level detector, solenoid valve respectively.
3. non-contact solution concentration pick-up unit as claimed in claim 2 is characterized in that, described liquid level detector is a ultrasonic meter.
CN2008102007048A 2008-09-27 2008-09-27 Non-contact solution concentration detection method and device thereof Expired - Fee Related CN101685057B (en)

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CN101685057B true CN101685057B (en) 2011-06-15

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102252941B (en) * 2011-06-16 2017-09-22 常州钇金环保科技有限公司 The method for detecting chromic anhydride content in Cr-plating Bath
CN105954144A (en) * 2016-05-13 2016-09-21 江苏科技大学 Density measurement equipment and method for variable-temperature metal
CN109187255A (en) * 2018-08-31 2019-01-11 奕瑞影像科技(太仓)有限公司 Measure the portable unit and measurement method of solid matter meltage in solution
CN111044407A (en) * 2020-01-17 2020-04-21 中铁工程装备集团有限公司 Non-contact passive pipeline medium density measurement method
CN111864232B (en) * 2020-08-03 2021-12-21 上海重塑能源科技有限公司 Gas purity detection method and hydrogen purity detection device of hydrogen supply system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1587974A (en) * 2004-09-29 2005-03-02 中国科学院力学研究所 Detector for water content rate of petroleum
CN1645095A (en) * 2005-01-20 2005-07-27 上海交通大学 Method for real-time measuring refrigerant quality of compressor oil by level and sampling method
CN101251462A (en) * 2008-04-02 2008-08-27 罗放明 Device and method for measuring liquid concentration in movable and static state

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1587974A (en) * 2004-09-29 2005-03-02 中国科学院力学研究所 Detector for water content rate of petroleum
CN1645095A (en) * 2005-01-20 2005-07-27 上海交通大学 Method for real-time measuring refrigerant quality of compressor oil by level and sampling method
CN101251462A (en) * 2008-04-02 2008-08-27 罗放明 Device and method for measuring liquid concentration in movable and static state

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