CN112284870A - Automatic control device and monitoring control method for nitrogen blowing instrument - Google Patents
Automatic control device and monitoring control method for nitrogen blowing instrument Download PDFInfo
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- CN112284870A CN112284870A CN202010997878.2A CN202010997878A CN112284870A CN 112284870 A CN112284870 A CN 112284870A CN 202010997878 A CN202010997878 A CN 202010997878A CN 112284870 A CN112284870 A CN 112284870A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 481
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 238
- 238000007664 blowing Methods 0.000 title claims abstract description 175
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 149
- 239000007788 liquid Substances 0.000 claims abstract description 100
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 210000000078 claw Anatomy 0.000 claims description 41
- 230000001276 controlling effect Effects 0.000 claims description 20
- 238000005485 electric heating Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000010191 image analysis Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 56
- 229910001220 stainless steel Inorganic materials 0.000 description 14
- 239000010935 stainless steel Substances 0.000 description 14
- 230000001681 protective effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000012488 sample solution Substances 0.000 description 4
- 239000012468 concentrated sample Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4022—Concentrating samples by thermal techniques; Phase changes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
- G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention relates to the technical field of detection, in particular to an automatic control device of a nitrogen blowing instrument, which mainly comprises an information acquisition system, a fixed moving mechanism and a control system; the invention carries out technical improvement on the basis of the existing nitrogen blowing instrument equipment, can respectively control the lifting of the nitrogen blowing pipe and the transparent test tube, realizes the real-time monitoring and adjustment of the nitrogen blowing condition of a test sample in the test tube, automatically closes and lifts the nitrogen blowing pipe after the requirement is met, lifts the transparent test tube above the liquid level of the water bath environment, and sends out a video prompt; the device replaces manual operation, realizes automation, has improved detection quality and efficiency, has solved among the prior art concentration process liquid level height and has judged inaccurate and to the inaccurate defect of concentration end node judgement.
Description
Technical Field
The invention relates to the technical field of detection, in particular to an automatic control device and a monitoring control method for a nitrogen blowing instrument.
Background
The method comprises the following steps that a nitrogen blowing instrument is commonly used for concentrating a sample in an inspection process, an operator needs to observe and manually adjust the distance between a nitrogen blowing pipe and the sample and the depth of the test tube immersed in a constant-temperature water bath kettle before nitrogen blowing, the distance between a sample liquid surface and the nitrogen blowing pipe needs to be observed constantly due to different sample concentration degrees in each test tube in the nitrogen blowing process, if the distance between the nitrogen blowing pipe and the sample liquid surface needs to be manually adjusted downwards, the time consumed by the sample in each test tube to reach the concentration requirement is different, whether the sample concentration degree in a certain test tube meets the requirement or not needs to be observed constantly, and nitrogen blowing needs to be stopped in time for the certain test tube meeting the requirement; because the observation is carried out by manual operation, in addition, some toxic substances in the samples are decomposed by light and need to be tested in a light-proof environment, the nitrogen blowing degree is inconvenient to observe, the over-blowing or under-blowing condition is easy to occur, and the nitrogen blowing quality and efficiency are not high.
Chinese patent document CN210665239U discloses an automatic nitrogen blowing instrument, which realizes the lifting of a test tube through a ball screw, a bevel gear, a motor and a structure, and is provided with an ultrasonic liquid level meter, thereby realizing the monitoring of the liquid level height, adjusting the distance between a nitrogen blowing tube and the liquid level of a sample according to the monitoring result, and controlling the final stop time according to the preset liquid level height. The utility model discloses realize automatic nitrogen and blow, constant volume, calibration, avoided the manual nitrogen of experimenter to blow the great error that brings, can raise the efficiency, the environmental protection is effectual. However, the ultrasonic liquid level meter used in the literature is sensitive to temperature, has an influence on the measurement precision when water mist exists, has a certain blind area in measurement, is large in size, is inconvenient to arrange when the diameter of a test tube is small, and is excessively complex and expensive compared with a traditional nitrogen blowing instrument device; further, since the concentration of different sample solutions is not determined, a method of determining the concentration completion time based on the height of the set sample solution cannot be applied.
In the prior art, most of the nitrogen blowpipes and the liquid level height are controlled in the concentration process, and in addition, the lifting of the test tube or the nitrogen blowpipe is controlled independently, so that the test tube can not be controlled to enter or exit the water bath, and still manual operation is needed; the situation of liquid level overturning is complex due to the fact that the concentration of a sample solution is low in the early stage of concentration, and a liquid level measuring device used in the prior art cannot accurately acquire and judge the actual height of a liquid level, so that the accuracy of a control process is low, and the concentration efficiency cannot reach the optimum; in addition, among the prior art elevating gear too complicated, can't be applicable to different diameter test tubes, especially minor diameter test tube, lead to nitrogen gas quantity to increase and concentrated efficiency reduces, can't realize the simultaneous control of different concentrated samples more than the multiunit.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an automatic control device of a nitrogen blowing instrument.
The invention also discloses a method for monitoring and controlling the concentration process by using the automatic control device of the nitrogen blowing instrument.
The invention aims to improve the technology on the basis of the existing nitrogen blowing instrument equipment, respectively control the lifting of a nitrogen blowing pipe and a transparent test tube, realize the real-time monitoring and adjustment of the nitrogen blowing condition of a sample in the test tube, automatically close and lift the nitrogen blowing pipe after the requirement is met, lift the transparent test tube above the liquid level of the water bath environment, and send out audio-visual prompts.
The technical scheme of the invention is as follows:
an automatic control device of a nitrogen blowing instrument is characterized by comprising an information acquisition system, a fixed moving mechanism and a control system;
the information acquisition system comprises a macro camera arranged on the fixed moving mechanism and a liquid level sensor in a water bath environment; the microspur camera is used for collecting the liquid level height of the sample in the transparent test tube;
the fixed moving mechanism comprises a first lifting mechanism and a second lifting mechanism;
the first lifting mechanism is used for driving the nitrogen blowing pipe to move up and down and extending the nitrogen blowing pipe into the transparent test tube to blow nitrogen to the sample in the transparent test tube;
the second lifting mechanism is used for driving the transparent test tube to move up and down so as to enable the transparent test tube to be automatically immersed into or separated from the water bath environment;
the control system is used for the nitrogen blowing instrument to automatically judge whether to continuously blow nitrogen to the sample by identifying the image of the sample blown with nitrogen in the transparent test tube; and is also used for: controlling a nitrogen blowing pipe to follow the height adjustment of the liquid level of the sample through a first lifting mechanism; and is also used for: the transparent test tube is controlled by the second lifting mechanism to automatically fall into the water bath environment.
The invention has the advantages that: the control system can adjust the lifting of the nitrogen blowing pipe and the transparent test tube according to the image information acquired by the information acquisition system, so that the automatic adjustment of the test tube entering and separating from the water bath pot is realized, the distance from the nitrogen blowing pipe to the liquid level of the sample can be automatically adjusted until the completion of the adjustment, the error and the labor amount caused by manual tracking adjustment are avoided, and the nitrogen blowing efficiency and the concentration quality are improved.
According to the invention, the automatic control device of the nitrogen blowing instrument further comprises a support mechanism, the support mechanism comprises a base, a vertical upright post, a vertical servo motor, a horizontal round tray, an electro-pneumatic protective sleeve and an electro-pneumatic sliding ring, the vertical upright post is arranged in the center of the base, the vertical servo motor is arranged at the top of the vertical upright post, the horizontal round tray is fixed at the top of a motor shaft of the vertical servo motor, the electro-pneumatic sliding ring is arranged in the center of the top surface of the horizontal round tray and connected with the electro-pneumatic protective sleeve at the top of the electro-pneumatic sliding ring, an electric control circuit is arranged in the electro-pneumatic protective sleeve, horizontal rods are arranged on the circumference of the horizontal round tray, a double snap ring is arranged at the outer end of each horizontal rod and used for fixing a first lifting mechanism and a second lifting mechanism, the first lifting mechanism is vertically arranged in one snap ring of the double snap rings, and the second lifting mechanism and the first lifting mechanism are arranged in the other snap ring of the double snap ring in parallel.
The invention has the advantages that: the double-clamping-ring structure ensures the constancy of the distance between the first lifting mechanism and the second lifting mechanism in the parallel direction, satisfies the relative stability between the first lifting mechanism and the transparent test tube in the process of controlling the lifting of the nitrogen blowing tube, and avoids the collision between the nitrogen blowing tube and the inner wall of the transparent test tube.
According to the optimization of the invention, the automatic control device of the nitrogen blowing instrument further comprises a gas supply system, wherein the gas supply system comprises a nitrogen main pipeline and a nitrogen branch pipeline; the nitrogen main pipe is arranged in a gas-electric sheath pipe and is connected with each nitrogen branch through the gas-electric slip ring; preferably, the nitrogen branch is connected with the nitrogen blow pipe through a shrink nut; and the miniature electromagnetic stop valve, the electric control pressure regulating valve, the main electric control stop valve and the electric control lead of the total pressure regulating valve are all connected with the control system and used for controlling the nitrogen blowing pipe to blow nitrogen to the sample in the transparent test tube.
The invention has the advantages that: the miniature electromagnetic stop valve, the electric control pressure regulating valve, the total electric control stop valve and the total pressure regulating valve automatically regulate the nitrogen pressure value in the nitrogen main pipeline and the nitrogen branch according to the command of the control system, so that the nitrogen blowing efficiency is faster, and the waste of nitrogen is avoided.
According to the invention, the automatic control device of the nitrogen blowing instrument further comprises a heating system, and the heating system is used for adjusting the temperature of the water bath to the water bath environment; preferably, the heating system comprises a water bath kettle and an electric heating device, the water bath kettle is arranged inside the base, and the electric heating device is arranged at the bottom of the water bath kettle and is connected with the control system through an electric control wire for controlling the temperature of the water bath environment.
The invention has the advantages that: the heating system ensures the stability and constancy of the water bath environment and ensures the concentration efficiency.
According to the invention, the information acquisition system further comprises pressure sensors arranged on the nitrogen branch and the nitrogen main pipeline, a temperature sensor arranged in the water bath environment, and a monitoring camera arranged above the supporting mechanism; all temperature sensors, pressure sensors and monitoring cameras are connected with the control system through electric control wires: the pressure sensor is used for determining whether the pressure values on the nitrogen branch pipeline and the nitrogen main pipeline reach set values or not; the temperature sensor is used for determining whether the ambient temperature of the water bath reaches a set value; the monitoring camera is used for recording the whole concentration process.
The invention has the advantages that: the temperature sensor ensures the stability of the water bath environment; the pressure sensor ensures the stability of the nitrogen pressure; the monitoring camera ensures the accuracy of sample concentration.
According to the invention, preferably, the first lifting mechanism comprises a first servo motor, a first electric control telescopic rod and a first telescopic end, wherein a first fixed sleeve is arranged at the lower end of the first telescopic end of the first electric control telescopic rod, and a nitrogen blowing pipe is vertically arranged on the first fixed sleeve; preferably, a first marked line is provided at the bottom end of the nitrogen blowing pipe.
The invention has the advantages that: the first lifting mechanism adopts a servo motor, so that the precision and the speed of controlling the lifting of the nitrogen blowing pipe are ensured.
According to the invention, the second lifting mechanism comprises a second servo motor, a second electric control telescopic rod and a second telescopic end, wherein a second fixed sleeve is arranged at the lower end of the second telescopic end of the second electric control telescopic rod, and a transparent test tube claw clamp device is arranged in the second fixed sleeve; preferably, the transparent test tube jaw clamp device is an electric control jaw clamp device, and one side outside the second fixed sleeve is provided with an electric control jaw clamp device control switch; preferably, the electrically controlled claw clamping device comprises two parallel claws which vertically clamp the transparent test tube, a second eye-catching mark line is arranged outside the upper part of the transparent test tube, and the second eye-catching mark line is flush with the tops of the parallel claws when the transparent test tube is installed; preferably, a second eye-catching mark line is arranged at the top of the transparent test tube; preferably, a light emitting diode is arranged at the top of the second electric control telescopic rod, and when the concentration is finished, the nitrogen blowing pipe stops blowing nitrogen gas, and the light emitting diode flickers.
The invention has the advantages that: the second lifting mechanism adopts a servo motor, so that the precision and the speed of controlling the lifting of the transparent test tube are ensured.
According to the invention, preferably, a vertical short rod is arranged at the lower end of the second fixing sleeve, a macro camera is arranged on the vertical short rod, and the horizontal axis center line of the macro camera and the vertical axis center line of the transparent test tube are in the same vertical plane.
According to the invention, preferably, the lower end of the first fixing sleeve is provided with an L-shaped rod, the L-shaped rod is provided with a macro camera, and the horizontal axis center line of the macro camera and the vertical axis center line of the nitrogen blowing pipe are in the same vertical plane.
A method for monitoring and controlling the concentration process by using the automatic control device of the nitrogen blowing instrument is characterized in that,
the method for automatically identifying the nitrogen blowing image of the sample comprises the following specific steps:
initially setting a distance value between the bottom end of a nitrogen blowing pipe and the highest point of the liquid level of a sample below as H1, setting H1 according to early test results of different samples, wherein the nitrogen pressure is constant in the nitrogen blowing process, liquid below the nitrogen blowing pipe can form a stable vortex, regular liquid level ripples are formed on the surface of the sample, the top end of the vortex is the lowest point of the liquid level, the wave crest of the liquid level ripples is the highest point of the liquid level, a microspur camera is used for collecting images from the side surface of a transparent test tube, two liquid level lines can be simulated, one liquid level ripple line is a liquid level ripple line, the other liquid level ripple line is a vortex line, the ripple height H2 and the vortex depth H3 can be obtained according to the simulated liquid level lines, and H1 is the distance between the bottom end of the nitrogen blowing pipe;
along with the volatilization of liquid, the vortex is smaller and smaller, the distance between the bottom end of the nitrogen blowing pipe and the top end of the liquid surface corrugated line is correspondingly larger, and the control system controls the movement of the first electric control telescopic rod according to image data fed back by the information acquisition system to ensure the constancy of H1;
meanwhile, with the increase of the concentration of the solution in the later period, particularly when the concentration is close to the concentration end point, the liquid surface ripple formed by the nitrogen blowing pipe under the same pressure and the same distance is smaller and smaller, the ripple height H2 and the vortex depth H3 are smaller and smaller, and when H2 is smaller than or equal to a set value H2 ', the H2' is set according to the test result of the early test, namely the blowing of nitrogen can be stopped;
preferably, the method further comprises: secondly, a method for automatically lifting a transparent test tube and a nitrogen blowing tube comprises the following specific steps:
when the concentration is started, the second electric control telescopic rod works to enable the bottom of the transparent test tube to descend to a specified height below the liquid level of the water bath environment, the first electric control telescopic rod works to enable the nitrogen blowing tube to move downwards and be inserted into the transparent test tube, and when the distance from the bottom end of the nitrogen blowing tube to the liquid level of the test sample reaches a programmed set value, the first electric control telescopic rod stops working;
in the nitrogen blowing process, when the distance from the bottom end of the nitrogen blowing pipe to the liquid level of the sample exceeds a specified range, the first electric control telescopic rod works to enable the distance from the bottom end of the nitrogen blowing pipe to the liquid level of the sample to be kept within a programmed set range;
when the overturning state of the liquid level of the sample in the transparent test tube meets the state characteristics of the programmed and set concentrated image, the first electric control telescopic rod works reversely to the highest position to enable the nitrogen blowing tube to rise from the transparent test tube, and then the second electric control telescopic rod works reversely to rise to the set height, namely the top end of the transparent test tube is lower than the bottom end of the nitrogen blowing tube;
preferably, the method further comprises: a method for monitoring and controlling the concentration process by using the automatic control device of the nitrogen blowing instrument comprises the following specific steps:
when the device is used, a tester puts a transparent test tube with a sample between two parallel claws according to a second striking mark line outside the test tube and keeps the mark line flush with the top surfaces of the parallel claws, then presses a control switch of an electric control claw clamp device to enable the two parallel claws to clamp the test tube, after all the transparent test tubes are installed, a nitrogen blowing instrument is started, each electric control component enters a working state, a control system controls an electric heating device to enable the water bath environment to reach a set temperature, and each second electric control telescopic rod works to enable the bottom of the transparent test tube to descend to a specified height below the liquid level of the water bath environment;
the micro-distance camera transmits the image data of the sample and the liquid level of the sample in the test tube to the control system in real time, the control system judges the image by means of image analysis, calculation and identification software and programming requirements, controls the first electric control telescopic rod to work to enable the nitrogen blowing tube to move downwards and be inserted into the transparent test tube, when the distance between the first eye-catching mark line at the bottom end of the nitrogen blowing tube and the liquid level of the sample reaches a programmed set value, the first electric control telescopic rod stops working, and when the distance between the first eye-catching mark line at the bottom end of the nitrogen blowing tube and the liquid level of the sample exceeds a specified range in the nitrogen blowing process, the control system controls the first electric control telescopic rod to work to enable the distance between the first eye-catching mark line at the bottom;
when the overturning state of the liquid level of the sample in the transparent test tube meets the state characteristics of a concentrated image set by programming, a control system closes a miniature electromagnetic stop valve connected to the nitrogen blowing tube, a light-emitting diode at the top of a second electric control telescopic rod flickers, the first electric control telescopic rod works reversely to the highest position to lift the nitrogen blowing tube from the transparent test tube, then the second electric control telescopic rod works reversely to the set height, namely the top end of the transparent test tube is lower than the bottom end of the nitrogen blowing tube, and the transparent test tube can be detached by pressing an electric control claw clamp device control switch; any first electric control telescopic rod is pulled by a hand to enable the horizontal round tray to rotate, a vertical axis servo motor can also be set to rotate slowly or intermittently, and the gas-electric slip ring can ensure the normal work of a gas-electric pipeline during rotation;
when the samples in all the transparent test tubes meet the concentration requirement, the control system closes the main electric control stop valve and the water bath electric heating device on the nitrogen main pipeline, and the monitoring camera records the whole concentration process.
The invention has the beneficial effects that:
1. the transparent test tube can be controlled to enter and exit the water bath pot through the lifting mechanism, and the distance between the nitrogen blowing tube and the liquid level of the sample in the nitrogen blowing process and the nitrogen blowing tube can be controlled to be pulled out of the transparent test tube after the nitrogen blowing is finished, so that the manual operation is saved, the safety is higher, and the risks of scalding and harmful substance suction caused by misoperation of personnel are avoided; in addition, because the second lifting mechanism for controlling the transparent test tube and the first lifting mechanism for controlling the nitrogen blowing tube are arranged in the double snap rings at the end of the same horizontal rod, the distance in the relative parallel direction is constant, so that the nitrogen blowing tube can move up and down in the transparent test tube more stably, the nitrogen blowing tube is prevented from colliding with the inner wall of the transparent test tube, and the stability of liquid level vortex and liquid level ripple below the nitrogen blowing tube in the concentration process is ensured;
2. the distance from the bottom end of the nitrogen blowing pipe to the top end of the ripple of the liquid level below the nitrogen blowing pipe is acquired through the microspur camera, the constant distance is ensured, the lifting of the nitrogen blowing pipe is controlled, the advantages of accurate control and furthest improvement of concentration efficiency are achieved, the sample solution can be ensured not to be splashed onto the nitrogen blowing pipe, and the cleanness of the nitrogen blowing pipe is ensured; in addition, the concentration end node can be judged according to the ripple height value of the liquid level of the concentrated sample, so that the sample concentration effect is ensured, and the waste of nitrogen is avoided;
3. because the transparent test tubes and the nitrogen blowing tubes are in one-to-one correspondence, each group of concentrated samples can be independently set for program control, and the equipment can simultaneously meet the requirements of concentrating different samples;
4. the rotation that gas electricity sliding ring and horizontal circle tray structure can realize the sample and do not influence nitrogen gas supply and electromechanical control, personnel do not need the shift position when having guaranteed transparent test tube of assembly, nitrogen blowpipe and concentrated completion dismantlement transparent test tube, nitrogen blowpipe, have made things convenient for personnel's operation, and the nitrogen blows the in-process simultaneously and does not influence going on of other sample concentrates, has guaranteed nitrogen and has blown efficiency.
Drawings
FIG. 1 is a front view of an automatic control device of a nitrogen blowing instrument;
FIG. 2 is a top view of an automatic control device of the nitrogen blowing instrument;
FIG. 3 is a view of FIG. 2 taken partially in the direction of A;
FIG. 4 is an enlarged top view of FIG. 3;
FIG. 5 is a side view of FIG. 3 (nitrogen blowing operation state diagram);
FIG. 6 is a view of the nitrogen blowing tube of FIG. 5 separated from the transparent test tube;
FIG. 7 is a view of FIG. 6 with the nitrogen lance removed;
FIG. 8 is a view showing the transparent test tube in FIG. 7 after the electrically controlled gripper device is lifted up and the transparent test tube is removed;
FIG. 9 is a control schematic block diagram;
FIG. 10 is a view showing the structure of a macro camera added to a first electric control telescopic rod;
FIG. 11 is a nitrogen blowing state diagram after the second electric control telescopic rod structure is omitted;
FIG. 12 is a structural view of the swing claw;
FIG. 13 is a diagram showing the state of the macro camera and the transparent test tube after the second electrically controlled telescopic rod structure is omitted;
FIG. 14 is a schematic view of the sample liquid level waviness line and the swirl line during nitrogen blowing;
FIG. 15 is a schematic view of the sample liquid level wavy line and the swirl line at the end of nitrogen blowing;
in the figure: 1-a microspur camera, 2-a liquid level sensor, 3-a first lifting mechanism, 4-a second lifting mechanism, 5-a nitrogen blowpipe, 6-a transparent test tube, 7-a base, 8-a vertical upright post, 9-a vertical servo motor, 10-a horizontal round tray, 11-a gas electric slip ring, 12-a gas electric protective sleeve, 13-a horizontal rod, 14-a double snap ring, 15-a nitrogen branch, 16-a shrink nut, 17-a water bath kettle, 18-an electric heating device, 19-a temperature sensor, 20-a monitoring camera, 21-a first servo motor, 22-a first electric control telescopic rod, 23-a first telescopic end, 24-a first fixed sleeve, 25-a first eye-catching mark line, 26-a second servo motor, 27-a second electric control telescopic rod, 28-a second telescopic end, 29-a second fixing sleeve, 30-an electric control claw clamping device, 31-an electric control claw clamping device control switch, 32-a parallel claw, 33-a second eye-catching mark line, 34-a light-emitting diode, 35-a vertical short rod, 36-an L-shaped rod, 37-a sample liquid level, 38-a ripple line, 39-a vortex line, 40-a water bath environment liquid level, 41-a vertical fixing stainless steel pipe, 42-up and down moving stainless steel, 43-a positioning jack, 44-a positioning pin shaft, 45-a first fixing shaft, 46-a swinging claw, 47-a first positioning block, 48-a swinging rod, 49-a second fixing shaft, 50-a second fixing block and 51-an elastic clamping ring.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the following further describes the embodiments of the present invention with reference to the attached drawings.
Example one
An automatic control device of a nitrogen blowing instrument comprises an information acquisition system, a fixed moving mechanism and a control system;
the information acquisition system comprises a macro camera 1 arranged on a fixed moving mechanism and a liquid level sensor 2 in a water bath environment; the macro camera 1 is used for collecting the liquid level height of a sample in the transparent test tube 6;
the fixed moving mechanism comprises a first lifting mechanism 3 and a second lifting mechanism 4;
the first lifting mechanism 3 is used for driving the nitrogen blowing pipe 5 to move up and down, and enabling the nitrogen blowing pipe 5 to extend into the transparent test tube 6 to blow nitrogen to the sample in the transparent test tube 6;
the second lifting mechanism 4 is used for driving the transparent test tube 6 to move up and down, so that the transparent test tube 6 is automatically immersed in or separated from the water bath environment;
the control system is used for the nitrogen blowing instrument to automatically judge whether to continuously blow nitrogen to the sample by identifying the image of the sample blown with nitrogen in the transparent test tube 6; and is also used for: the nitrogen blowing pipe 5 is controlled by the first lifting mechanism 3 to follow the height adjustment of the liquid level of the sample; and is also used for: the transparent test tube 6 is controlled by the second lifting mechanism 4 to automatically fall into the water bath environment.
Example two
A supporting mechanism is added on the basis of the first embodiment, the supporting mechanism comprises a base 7, a vertical upright post 8, a vertical servo motor 9, a horizontal circular tray 10, an air-electric slip ring 11 and an air-electric protective sleeve 12, the vertical upright post 8 is arranged in the center of the base 7, the vertical servo motor 9 is arranged at the top of the vertical upright post 8, the horizontal circular tray 10 is fixed at the top of a motor shaft of the vertical servo motor 9, the air-electric slip ring 11 is arranged at the center of the top surface of the horizontal circular tray 10, the air-electric slip ring 11 is connected with the air-electric protective sleeve 12 at the top of the air-electric slip ring, an electric control circuit is arranged in the air-electric protective sleeve 12, horizontal rods 13 are arranged on the circumference of the horizontal circular tray 10, double snap rings 14 are arranged at the outer end parts of each horizontal rod 13, the double snap rings 14 are used for fixing a first lifting mechanism 3 and a second lifting mechanism 4, the first lifting mechanism 3 is vertically arranged in one snap ring of the, and the second lifting mechanism 4 is arranged in the other snap ring of the double snap ring 14 in parallel with the first lifting mechanism 3.
EXAMPLE III
A gas supply system is added on the technology of the second embodiment, and comprises a nitrogen main pipeline and a nitrogen branch pipeline 15; a micro electromagnetic stop valve and an electric control pressure regulating valve are arranged on the nitrogen branch 15, the micro electromagnetic stop valve and the electric control pressure regulating valve are connected with a nitrogen main pipeline through pipelines, a main electric control stop valve and a main electric control pressure regulating valve are arranged on the nitrogen main pipeline, and the nitrogen main pipeline is connected with each nitrogen branch 15 through the gas-electric slip ring 11; preferably, the nitrogen branch 15 is connected with the nitrogen blow pipe 5 through a shrink nut 16; and the miniature electromagnetic stop valve, the electric control pressure regulating valve, the main electric control stop valve and the electric control lead of the total pressure regulating valve are all connected with the control system and used for controlling the nitrogen blowing pipe to blow nitrogen to the sample in the transparent test tube 6.
Example four
And a heating system is added on the basis of the third embodiment, and the heating system is used for adjusting the temperature of the water bath to the water bath environment. Preferably, the heating system comprises a water bath 17 and an electric heating device 18, the water bath 17 is arranged inside the base, and the electric heating device 18 is arranged at the bottom of the water bath 17 and connected with the control system through an electric control wire for controlling the temperature of the water bath environment.
EXAMPLE five
On the basis of the third embodiment, the information acquisition system further comprises pressure sensors arranged on the nitrogen branch 15 and the nitrogen main pipeline, a temperature sensor 19 arranged in the water bath environment, and a monitoring camera 20 arranged above the supporting mechanism; all temperature sensors 19, pressure sensors and monitoring cameras 20 are connected with the control system through electric control wires.
EXAMPLE six
In a first embodiment, the first lifting mechanism 3 includes a first servo motor 21, a first electrically controlled telescopic rod 22 and a first telescopic end 23, a first fixing sleeve 24 is installed at a lower end of the first telescopic end 23 of the first electrically controlled telescopic rod 22, and a nitrogen blowing pipe 5 is vertically installed on the first fixing sleeve 24; preferably, a first eye-marked line 25 is provided at the bottom end of the nitrogen blowing pipe 5.
EXAMPLE seven
In the first embodiment, the second lifting mechanism 4 includes a second servo motor 26, a second electrically controlled telescopic rod 27 and a second telescopic end 28, a second fixing sleeve 29 is mounted at the lower end of the second telescopic end 28 of the second electrically controlled telescopic rod 27, and a transparent test tube gripper device is mounted on the second fixing sleeve 29; preferably, the transparent test tube jaw clamp device is an electric control jaw clamp device 30, and one side of the outer side of the second fixing sleeve 29 is provided with an electric control jaw clamp device control switch 31; preferably, the electrically controlled jaw clamping device 30 comprises two parallel jaws 32 for vertically clamping the transparent test tube 6; preferably, a second eye-catching mark line 33 is provided on the top of the transparent test tube; preferably, a light emitting diode 34 is arranged at the top of the second electric control telescopic rod 27, when the concentration is finished, the nitrogen blowing pipe 5 stops blowing the nitrogen gas, and the light emitting diode 34 flickers.
Example eight
On the basis of the seventh embodiment, a vertical short rod 35 is arranged at the lower end of the second fixing sleeve 29, a plurality of macro cameras 1 are mounted on the vertical short rod 35, and the horizontal axis of each macro camera 1 and the vertical axis of the transparent test tube 6 are in the same vertical plane.
Example nine
Referring to fig. 10, on the basis of the eighth embodiment, in the present embodiment, an L-shaped rod 36 is disposed at the lower end of the first fixing sleeve 24, a macro camera 1 is disposed on the L-shaped rod 36, and a horizontal axis center line of the macro camera 1 and a vertical axis center line of the nitrogen blowing pipe 5 are in the same vertical plane; the macro-camera 1 and the nitrogen blowing pipe 5 are lifted synchronously, so that the nitrogen blowing progress of the liquid level below the nitrogen blowing pipe 5 is synchronously recorded, and the concentration control precision is higher.
The method for monitoring and controlling the concentration process by using the automatic control device of the nitrogen blowing instrument described in the first to ninth embodiments comprises the following steps:
the method for automatically identifying the nitrogen blowing image of the sample comprises the following specific steps:
referring to fig. 14-15, a distance value between the bottom end of a nitrogen blowing pipe and the highest point of the liquid level 37 of a lower sample is initially set to be H1, H1 is set according to previous test results of different samples, because the pressure of nitrogen is constant in the nitrogen blowing process, liquid below the nitrogen blowing pipe forms a stable vortex, regular liquid level ripples are formed on the surface of the sample, the top end of the vortex is the lowest point of the liquid level, the peak of the liquid level ripples is the highest point of the liquid level, images are collected from the side face of a transparent test tube by a microspur camera, two liquid level lines can be simulated, one is a liquid level ripple line 38 and the other is a vortex line 39, according to the simulated liquid level lines, the ripple height H2 and the vortex depth H3 can be obtained, and H1 is the distance between the bottom end of the nitrogen blowing pipe and the top end;
along with the volatilization of liquid, the vortex is smaller and smaller, the distance between the bottom end of the nitrogen blowing pipe and the top end of the liquid surface corrugated line is correspondingly larger, and the control system controls the movement of the first electric control telescopic rod according to image data fed back by the information acquisition system to ensure the constancy of H1;
meanwhile, with the increase of the concentration of the solution in the later period, particularly when the concentration is close to the concentration end point, the liquid surface ripple formed by the nitrogen blowing pipe under the same pressure and the same distance is smaller and smaller, the ripple height H2 and the vortex depth H3 are smaller and smaller, and when H2 is smaller than or equal to a set value H2 ', the H2' is set according to the test result of the early test, namely the blowing of nitrogen can be stopped;
preferably, the method further comprises: secondly, a method for automatically lifting a transparent test tube and a nitrogen blowing tube comprises the following specific steps:
when concentration starts, the second electric control telescopic rod 27 works to enable the bottom of the transparent test tube 6 to descend to a specified height below the liquid level 40 of the water bath environment, the first electric control telescopic rod 22 works to enable the nitrogen blowing tube 5 to move downwards to be inserted into the transparent test tube 6, and when the distance from the bottom end of the nitrogen blowing tube 5 to the liquid level 37 of the sample reaches a programmed set value, the first electric control telescopic rod 22 stops working;
in the nitrogen blowing process, when the distance from the bottom end of the nitrogen blowing pipe 5 to the liquid level 37 of the sample exceeds a specified range, the first electric control telescopic rod 22 works to enable the distance from the bottom end of the nitrogen blowing pipe 5 to the liquid level 37 of the sample to be kept within a programmed set range;
when the overturning state of the liquid level of the sample in the transparent test tube 6 meets the state characteristics of the programmed and set concentrated image, the first electric control telescopic rod 22 works reversely to the highest position to enable the nitrogen blowing tube 5 to rise from the transparent test tube 6, and then the second electric control telescopic rod 27 works reversely to rise to the set height, namely the top end of the transparent test tube 6 is lower than the bottom end of the nitrogen blowing tube 5;
preferably, the method further comprises: a method for monitoring and controlling the concentration process by using the automatic control device of the nitrogen blowing instrument comprises the following specific steps:
when the device is used, a tester puts a transparent test tube with a sample between two parallel claws 32 according to a second eye-catching mark line 33 outside the test tube and keeps the mark line parallel to the top surfaces of the parallel claws 32, then presses an electric control claw clamp device control switch 31 to enable the two parallel claws to clamp the transparent test tube 6, after all the transparent test tubes 6 are installed, a nitrogen blowing instrument is started, each electric control component enters a working state, a control system controls an electric heating device 18 to enable the water bath environment to reach a set temperature, and each second electric control telescopic rod 27 works to enable the bottom of the transparent test tube 6 to descend to a specified height below the liquid level 40 of the water bath environment;
the macro camera 1 transmits the image data of the sample in the test tube and the sample liquid level 37 to the control system in real time, after the control system judges the image by means of image analysis, calculation and recognition software and programming requirements, the control system controls the first electric control telescopic rod 22 to work to enable the nitrogen blowing tube 5 to move downwards and be inserted into the transparent test tube 6, when the distance from the first eye-catching mark line 25 at the bottom end of the nitrogen blowing tube 5 to the sample liquid level reaches a programmed set value, the first electric control telescopic rod 22 stops working, and when the distance from the first eye-catching mark line 25 at the bottom end of the nitrogen blowing tube 5 to the sample liquid level 37 exceeds a specified range in the nitrogen blowing process, the control system controls the first electric control telescopic rod 22 to work to enable the distance from the first eye-catching mark line 25 at the bottom end of the nitrogen blowing tube;
when the overturning state of the liquid level of the sample in the transparent test tube 6 meets the state characteristics of the programmed and set concentrated image, the control system closes the miniature electromagnetic stop valve connected to the nitrogen blow tube 5, the light emitting diode 34 at the top of the second electric control telescopic rod 27 flickers, the first electric control telescopic rod 22 works reversely to the highest position to lift the nitrogen blow tube 5 from the transparent test tube 6, then the second electric control telescopic rod 27 works reversely to the set height, namely the top end of the transparent test tube 6 is lower than the bottom end of the nitrogen blow tube 5, and at the moment, the transparent test tube 6 can be detached by pressing the electric control claw clamp device control switch 31; any first electric control telescopic rod 22 is pulled by a hand to enable the horizontal round tray 10 to rotate, the vertical axis servo motor 9 can also be set to rotate slowly or intermittently, and the gas-electric slip ring 11 can ensure the normal work of the gas-electric pipeline when rotating;
when the samples in all the transparent test tubes 6 meet the concentration requirement, the control system closes the main electric control stop valve and the water bath kettle electric heating device on the nitrogen main pipeline, and the monitoring camera 20 records the whole concentration process.
Example ten
The second electric control telescopic rod 27 in the sixth embodiment is changed into a stainless steel pipe 41 which is vertically fixed and a stainless steel pipe 42 which moves up and down; preferably, the second fixing sleeve 29 and the electric control claw clamping device 30 are replaced by an elastic snap ring 51;
the elastic snap ring 51 in the tenth embodiment is also applicable to the seventh embodiment, and the macro camera structure in the eighth embodiment is also applicable to the tenth embodiment;
the structure and the implementation method for specifically replacing the second electric control telescopic rod 20 are as follows:
referring to fig. 11 to 13, a vertical fixed stainless steel tube 41 is disposed on the horizontal rod 13, an up-down moving stainless steel tube 42 is disposed in the vertical fixed stainless steel tube 41, a plurality of positioning insertion holes 43 are disposed at the upper portion of the up-down moving stainless steel tube 42, and a positioning pin 44 can be horizontally inserted into the positioning insertion holes 43; the position where the positioning pin shaft 44 is inserted determines the depth of the macro camera 1 and the transparent test tube 6 immersed below the water bath environment liquid level 40. A swing claw 46 is arranged on the vertically moving stainless steel pipe 42 through a first fixed shaft 45, the swing claw 46 rotates leftwards (anticlockwise) naturally because the left part of the weight of the swing claw 46 is larger than the right part of the weight of the first fixed shaft 45, a first positioning block 47 is arranged on the vertically moving stainless steel pipe 42 on the left side of the swing claw 46, the first positioning block 47 can support the swing claw 46 to enable the swing claw 46 to be in a horizontal state, a swing rod 48 is arranged on the first telescopic end 23 through a second fixed shaft 49, a second fixing block 50 is arranged on the left side of the second fixed shaft 49 and below the swing rod 48, namely the first telescopic end 23, the second fixing block 50 can support the swing rod 48 to enable the swing rod 48 to be in a horizontal state;
when the device is used, firstly, the depth of the macro camera 1 and the transparent test tube 6 which are immersed below the liquid level 40 of the water bath environment is determined, namely, the positioning pin shaft 44 is inserted into a proper positioning pin hole 43, the vertically moving stainless steel tube 42 is slightly lifted up, the swinging rod 48 is rotated to the position above the swinging claw 46, then the vertically moving stainless steel tube 42 is moved downwards, the pin shaft 41 is dropped at the top end of the vertically fixed stainless steel tube 42, at the moment, the microspur camera 1 and the transparent test tube 6 are immersed into the water bath environment below the liquid level 40 by a set depth, when the first telescopic end 23 moves downwards, the swing rod 39 touches the right upper arc of the swing claw 46, at this time, the swing claw 46 rotates clockwise by an angle smaller than 90 degrees to make the swing rod move downwards continuously, the swing claw 46 is also restored to the original state because the weight on the left side of the swing claw 46 is greater than that on the right side, and the first positioning block 47 on the left side of the swing claw 46 can enable the swing claw 46 to be in the horizontal state; when the first telescopic end 23 moves upwards, the swing rod 48 touches the lower right edge of the swing claw 46, and at the moment, the swing claw 46 and the swing rod 48 cannot rotate anticlockwise, so that the first telescopic end 23 can lift the up-and-down moving stainless steel tube 42 to a certain height after lifting to a certain height, so that the macro camera 1 and the transparent test tube 6 are lifted to a position above the water bath environment liquid level 40, and the two electric control telescopic rods are used by one electric control telescopic rod.
Claims (10)
1. An automatic control device of a nitrogen blowing instrument is characterized by comprising an information acquisition system, a fixed moving mechanism and a control system;
the information acquisition system comprises a macro camera arranged on the fixed moving mechanism and a liquid level sensor in a water bath environment; the microspur camera is used for collecting the liquid level height of the sample in the transparent test tube;
the fixed moving mechanism comprises a first lifting mechanism and a second lifting mechanism;
the first lifting mechanism is used for driving the nitrogen blowing pipe to move up and down and extending the nitrogen blowing pipe into the transparent test tube to blow nitrogen to the sample in the transparent test tube;
the second lifting mechanism is used for driving the transparent test tube to move up and down so as to enable the transparent test tube to be automatically immersed into or separated from the water bath environment;
the control system is used for the nitrogen blowing instrument to automatically judge whether to continuously blow nitrogen to the sample by identifying the image of the sample blown with nitrogen in the transparent test tube; and is also used for: controlling a nitrogen blowing pipe to follow the height adjustment of the liquid level of the sample through a first lifting mechanism; and is also used for: the transparent test tube is controlled by the second lifting mechanism to automatically fall into the water bath environment.
2. The automatic control device of a nitrogen blowing instrument according to claim 1, further comprising a support mechanism, wherein the support mechanism comprises a base, a vertical upright, a vertical servo motor, a horizontal circular tray, an electro-pneumatic sheath tube and an electro-pneumatic sliding ring, the vertical upright is arranged at the center of the base, the vertical servo motor is arranged at the top of the vertical upright, the horizontal circular tray is fixed at the top of a motor shaft of the vertical servo motor, the electro-pneumatic sliding ring is arranged at the center of the top surface of the horizontal circular tray and connected with the electro-pneumatic sheath tube at the top of the electro-pneumatic sliding ring, an electric control circuit is arranged in the electro-pneumatic sheath tube, horizontal rods are arranged on the circumference of the horizontal circular tray, double clamping rings are arranged at the outer end parts of each horizontal rod and used for fixing a first lifting mechanism and a second lifting mechanism, the first lifting mechanism is vertically arranged in one clamping ring of the double clamping rings, and the second lifting mechanism and the first lifting mechanism are arranged in the other snap ring of the double snap ring in parallel.
3. The automatic control device of the nitrogen blowing instrument according to claim 2, characterized by further comprising a gas supply system, wherein the gas supply system comprises a nitrogen main pipeline and a nitrogen branch pipeline; the nitrogen main pipe is arranged in a gas-electric sheath pipe and is connected with each nitrogen branch through the gas-electric slip ring; preferably, the nitrogen branch is connected with the nitrogen blow pipe through a shrink nut; and the miniature electromagnetic stop valve, the electric control pressure regulating valve, the main electric control stop valve and the electric control lead of the total pressure regulating valve are all connected with the control system and used for controlling the nitrogen blowing pipe to blow nitrogen to the sample in the transparent test tube.
4. The automatic control device of the nitrogen blowing instrument according to claim 3, characterized by further comprising a heating system for adjusting the temperature of the water bath environment for the water bath environment; preferably, the heating system comprises a water bath kettle and an electric heating device, the water bath kettle is arranged inside the base, and the electric heating device is arranged at the bottom of the water bath kettle and is connected with the control system through an electric control wire for controlling the temperature of the water bath environment.
5. The automatic control device of a nitrogen blowing instrument according to claim 4, wherein the information acquisition system further comprises pressure sensors installed on the nitrogen branch and the nitrogen main pipeline, a temperature sensor installed in the water bath environment, and a monitoring camera installed above the supporting mechanism; all the temperature sensors, the pressure sensors and the monitoring cameras are connected with the control system through electric control wires.
6. The automatic control device of a nitrogen blowing instrument as claimed in claim 1, wherein said first lifting mechanism comprises a first servo motor, a first electrically controlled telescopic rod and a first telescopic end, a first fixing sleeve is mounted at the lower end of the first telescopic end of said first electrically controlled telescopic rod, and a nitrogen blowing tube is vertically mounted on said first fixing sleeve; preferably, a first marked line is provided at the bottom end of the nitrogen blowing pipe.
7. The automatic control device of a nitrogen blowing instrument according to claim 1, wherein the second lifting mechanism comprises a second servo motor, a second electric control telescopic rod and a second telescopic end, a second fixed sleeve is arranged at the lower end of the second telescopic end of the second electric control telescopic rod, and a transparent test tube claw clamp device is arranged in the second fixed sleeve; preferably, the transparent test tube jaw clamp device is an electric control jaw clamp device, and one side outside the second fixed sleeve is provided with an electric control jaw clamp device control switch; preferably, the electric control jaw clamping device comprises two parallel jaws which vertically clamp the transparent test tube; preferably, a second eye-catching mark line is arranged at the top of the transparent test tube; preferably, a light emitting diode is arranged at the top of the second electric control telescopic rod, and when the concentration is finished, the nitrogen blowing pipe stops blowing nitrogen gas, and the light emitting diode flickers.
8. The automatic control device of a nitrogen blowing instrument according to claim 7, wherein a vertical short bar is provided at the lower end of the second fixing sleeve, a macro camera is provided on the vertical short bar, and the horizontal axis center line of the macro camera is in the same vertical plane with the vertical axis center line of the transparent test tube.
9. The automatic control device of a nitrogen blowing instrument as claimed in claim 8, wherein an L-shaped rod is arranged at the lower end of the first fixing sleeve, a macro camera is arranged on the L-shaped rod, and the horizontal axis center line of the macro camera and the vertical axis center line of the nitrogen blowing pipe are in the same vertical plane.
10. A method for monitoring and controlling a concentration process by using an automatic control device of a nitrogen blowing instrument according to any one of claims 1-9, which comprises the following steps:
the method for automatically identifying the nitrogen blowing image of the sample comprises the following specific steps:
initially setting a distance value between the bottom end of a nitrogen blow pipe and the highest point of the liquid level of a sample below as H1, setting H1 according to the early test results of different samples, and acquiring images from the side surface of a transparent test tube by using a microspur camera to obtain the ripple height H2 and the vortex depth H3, wherein H1 is the distance between the bottom end of the nitrogen blow pipe and the top end of a ripple line of the liquid level;
along with the volatilization of liquid, the vortex is smaller and smaller, the distance between the bottom end of the nitrogen blowing pipe and the top end of the liquid surface corrugated line is correspondingly larger, and the control system controls the movement of the first electric control telescopic rod according to image data fed back by the information acquisition system to ensure the constancy of H1;
meanwhile, with the increase of the concentration of the solution in the later period, particularly when the concentration is close to the concentration end point, the liquid surface ripple formed by the nitrogen blowing pipe under the same pressure and the same distance is smaller and smaller, the ripple height H2 and the vortex depth H3 are smaller and smaller, and when H2 is smaller than or equal to a set value H2 ', the H2' is set according to the test result of the early test, namely the blowing of nitrogen can be stopped;
preferably, the method further comprises: secondly, a method for automatically lifting a transparent test tube and a nitrogen blowing tube comprises the following specific steps:
when the concentration is started, the second electric control telescopic rod works to enable the bottom of the transparent test tube to descend to a specified height below the liquid level of the water bath environment, the first electric control telescopic rod works to enable the nitrogen blowing tube to move downwards and be inserted into the transparent test tube, and when the distance from the bottom end of the nitrogen blowing tube to the liquid level of the test sample reaches a programmed set value, the first electric control telescopic rod stops working;
in the nitrogen blowing process, when the distance from the bottom end of the nitrogen blowing pipe to the liquid level of the sample exceeds a specified range, the first electric control telescopic rod works to enable the distance from the bottom end of the nitrogen blowing pipe to the liquid level of the sample to be kept within a programmed set range;
when the overturning state of the liquid level of the sample in the transparent test tube meets the state characteristics of the programmed and set concentrated image, the first electric control telescopic rod works reversely to the highest position to enable the nitrogen blowing tube to rise from the transparent test tube, and then the second electric control telescopic rod works reversely to rise to the set height, namely the top end of the transparent test tube is lower than the bottom end of the nitrogen blowing tube;
preferably, the method further comprises: the method for realizing the detection and control of the concentration process by using the automatic control device of the nitrogen blowing instrument comprises the following specific steps:
when the device is used, a tester puts a transparent test tube with a sample between two parallel claws according to a second striking mark line on the test tube and keeps the mark line flush with the top surfaces of the two parallel claws, then presses a control switch of an electric control claw clamp device to enable the two parallel claws to clamp the test tube, after all the transparent test tubes are installed, a nitrogen blowing instrument is started, each electric control component enters a working state, a control system controls an electric heating device to enable the water bath environment to reach a set temperature, and each second electric control telescopic rod works to enable the bottom of the transparent test tube to descend to a specified height below the liquid level of the water bath environment;
the micro-distance camera transmits the image data of the sample and the liquid level of the sample in the test tube to the control system in real time, the control system judges the image by means of image analysis, calculation and identification software and programming requirements, controls the first electric control telescopic rod to work to enable the nitrogen blowing tube to move downwards and be inserted into the transparent test tube, when the distance between the first eye-catching mark line at the bottom end of the nitrogen blowing tube and the liquid level of the sample reaches a programmed set value, the first electric control telescopic rod stops working, and when the distance between the first eye-catching mark line at the bottom end of the nitrogen blowing tube and the liquid level of the sample exceeds a specified range in the nitrogen blowing process, the control system controls the first electric control telescopic rod to work to enable the distance between the first eye-catching mark line at the bottom;
when the overturning state of the liquid level of the sample in the transparent test tube meets the state characteristics of a concentrated image set by programming, a control system closes a miniature electromagnetic stop valve connected to the nitrogen blowing tube, a light-emitting diode at the top of a second electric control telescopic rod flickers, the first electric control telescopic rod works reversely to the highest position to lift the nitrogen blowing tube from the transparent test tube, then the second electric control telescopic rod works reversely to the set height, namely the top end of the transparent test tube is lower than the bottom end of the nitrogen blowing tube, and the transparent test tube can be detached by pressing an electric control claw clamp device control switch; any first electric control telescopic rod is pulled by a hand to enable the horizontal round tray to rotate, a vertical axis servo motor can also be set to rotate slowly or intermittently, and the gas-electric slip ring can ensure the normal work of a gas-electric pipeline during rotation;
when the samples in all the transparent test tubes meet the concentration requirement, the control system closes the main electric control stop valve and the water bath electric heating device on the nitrogen main pipeline, and the monitoring camera records the whole concentration process.
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| CN211122229U (en) * | 2019-11-22 | 2020-07-28 | 天津迪沃特生物电子科技有限公司 | Automatic height-adjusting nitrogen blows concentrated appearance |
| CN112255076A (en) * | 2020-10-24 | 2021-01-22 | 上海汇像信息技术有限公司 | Nitrogen blowing device and control method thereof |
| CN216117042U (en) * | 2021-09-06 | 2022-03-22 | 无锡积塔技术有限公司 | Intelligence nitrogen blows evaporation plant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284870B (en) * | 2020-09-21 | 2022-08-16 | 中标华谱(山东)智能科技有限公司 | Automatic control device and monitoring control method for nitrogen blowing instrument |
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