CN108398428A - The optical detecting method of residual liquid in a kind of Rotary Evaporators - Google Patents
The optical detecting method of residual liquid in a kind of Rotary Evaporators Download PDFInfo
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- CN108398428A CN108398428A CN201810102954.1A CN201810102954A CN108398428A CN 108398428 A CN108398428 A CN 108398428A CN 201810102954 A CN201810102954 A CN 201810102954A CN 108398428 A CN108398428 A CN 108398428A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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Abstract
The present invention relates to a kind of optical detecting methods of residual liquid in Rotary Evaporators, it is characterized in that following the steps below：A, Rotary Evaporators and laser detector have at least been used during optical detection；B, water-bath is located at the lower section of the evaporative flask；Motor is located at evaporative flask bottle mouth position；Condenser pipe is connected with the bottleneck of evaporative flask；C, in laser detector, laser emitter and photoelectric sensor are located at the both sides of water-bath；D, laser emitter is irradiated towards the liquid level in water-bath just in the evaporative flask of heating water bath, liquid level in evaporative flask generates reflection by laser, the laser reflected can be received by photoelectric sensor and generate current signal, and current signal transfer to data terminal carries out processing and shows；E, judge whether the residual liquid in Rotary Evaporators is evaporated, achieve the purpose that control evaporation process.The present invention can effective solution rotate the insufficient problem that can not be measured automatically present in device at present.
Description
Technical field
The present invention relates to a kind of optical detecting methods of residual liquid in Rotary Evaporators.
Background technology
Rotary Evaporators are called rotary evaporator, are laboratory commonly used equipments, are mainly used for continuous still under reduced pressure
Volatile solvents are applied to the fields such as chemistry, chemical industry, biological medicine.The operation principle vacuum distillation of Rotary Evaporators.Pass through
Electronic control makes flask in the case where being most suitable for speed, and constant speed rotary makes evaporation flask to increase disengagement area by vacuum pump
In negative pressure state, since the boiling point of liquid under subnormal ambient can be less than the numerical value of normal atmosphere (An) so that liquid to be evaporated is more
It is easy to be evaporated；Evaporation flask is in rotation while being placed in heated at constant temperature in water-bath, and solution is under negative pressure in rotary flask in bottle
It is inside not only due to rotation and forms film, increase disengagement area, can also carry out heating diffusive evaporation.
The existing revolving device in laboratory, mostly without metric function, so experimenter is needed using revolving device every time
Judge the liquid in evaporative flask and be when reaching requirement of experiment experimenter is required for need to visually observe, and when liquid is surplus
When surplus is very micro, it is also necessary to which for the experience by experimenter to determine whether being evaporated, such case does not require nothing more than experimenter
To be stayed in always in experimental implementation beside revolving device prevent liquid to be evaporated damage sample, and is sentenced by operating experience
It is disconnected whether to be evaporated, it is easy to different experimenters occur when carrying out same operation, since the understanding of different experiments personnel is sentenced
Breaking not necessarily can be consistent, may result in experimental result disunity, the reproducibility precision of experiment is relatively low；Rotate the evaporative flask of device
All be placed in water bath and carry out heating water bath, thus experimenter need by evaporative flask at any time from water bath take out from,
Whether the solution in analysis and confirmation evaporative flask is evaporated；Due to frequently carrying out the operation, on the one hand can cause required for evaporation
The time of consumption is elongated, on the other hand needs to consume experimenter's a large amount of time and energy, is not carried out the automatic of instrument
Change and mechanization.
Currently, occurring a part of revolving device with metric function on the market, operation principle is in rotating device
Evaporative flask bottle mouth position installation flow sensor carrys out the circulation of detection gas humidity, or using elastic sensing element by
Evaporative flask and gas-guide tube deform in the case of squeezing, and contrast signal variable quantity judges the residual liquid quantity of evaporative flask.But
All there is deficiencies for these types of method：Measurement apparatus is all in direct contact with the gas in evaporative flask, and contact for a long time may go out
Existing measurement apparatus makes moist the problem of causing precision to reduce, and may be damaged device under extreme case, brings economic loss.
Therefore, it studies residual liquid detection method in a kind of new Rotary Evaporators and carrys out effective solution and rotate device at present
The problem of, the work load for reducing experimenter is essential.
Invention content
The object of the present invention is to provide a kind of optical detecting methods of residual liquid in Rotary Evaporators to carry out effective solution
The insufficient problem that can not be measured automatically present in revolving device at present.
The present invention basic conception be：It insufficient is asked for solve not measuring automatically present in revolving device at present
Topic, the method for the present invention is to solve in the following ways：A Rotary Evaporators and a laser detector are contained, wherein revolving
Turning evaporimeter includes：Water-bath, evaporative flask, motor and condenser pipe；Laser detector includes：Laser emitter and photoelectricity
Sensor；
The water-bath is located at the lower section of the evaporative flask, and the purpose is to the carry out heating water baths to evaporative flask；
The motor is located at evaporative flask bottle mouth position, the purpose is to rotate evaporative flask, so that evaporative flask is rotated and improves evaporation effect
Rate；
The condenser pipe is connected with the bottleneck of evaporative flask, the purpose is to condense and collect the gas after evaporation, condenses
The type of pipe can be straight cold finger, spherical condensation tube, serpentine condenser etc.；
In the laser detector, laser emitter and photoelectric sensor are located at the both sides of water-bath, sharp can allow
Laser caused by optical transmitting set can be radiated on the liquid level in evaporative flask, can be generated and be reflected and received by photoelectric sensor
It needs to adjust for the incident angle of the requirement of adjustment, therefore laser emitter.
Laser emitter in the evaporative flask of heating water bath towards being just irradiated in water-bath, due to the liquid level energy in evaporative flask
Enough to generate reflection, the laser reflected can be received by photoelectric sensor and generate current signal, current signal transfer to data end
End carries out processing and shows, wherein photoelectric sensor can be array image sensor (area array CCD), line scan image sensor (line
Battle array CCD) or other optical sensors.
The laser detector can be connected and fixed with the water-bath of Rotary Evaporators, or the electricity with Rotary Evaporators
Other modes such as machine connection are fixed, and the fixed form is also within protection scope of the present invention.
The present invention be it is a kind of judging whether the residual liquid in Rotary Evaporators is evaporated using optical detecting method, by
In the process that evaporation process is a dynamic change, after liquid level changes, the laser irradiation after reflection is in photoelectric sensing
Position can also change when on device, and after the sample to be evaporated in evaporative flask is evaporated, laser irradiation is on the photosensor
Position can not change in a short time, the optical signal received is converted to current signal by photoelectric sensor, then is transmitted
Operation is carried out to data terminal to show, thus, it is possible to be changed to judge to rotate according to the position data of laser on the photosensor
Whether sample to be evaporated is evaporated in evaporimeter, so as to determine the surplus of residual liquid in evaporimeter, reaches control
The purpose of evaporation process.
Specifically, in a kind of Rotary Evaporators of the present invention residual liquid optical detecting method, it is characterized in that
It follows the steps below：
A, the Rotary Evaporators and laser detector, wherein Rotary Evaporators have at least been used during optical detection to include
Water-bath, evaporative flask, motor and condenser pipe；Laser detector includes laser emitter and photoelectric sensor；
B, the water-bath is located at the lower section of the evaporative flask, and the purpose is to the carry out heating water baths to evaporative flask；It is described
Motor is located at evaporative flask bottle mouth position, the purpose is to rotate evaporative flask, so that evaporative flask is rotated and improves evaporation efficiency；The condenser pipe
It is connected with the bottleneck of evaporative flask, the purpose is to the gas after evaporation is condensed and collected；
C, in the laser detector, laser emitter and photoelectric sensor are located at the both sides of water-bath, adjust
The incident angle of whole laser emitter, can allow laser caused by laser emitter that can be radiated at the liquid level in evaporative flask
On, reflection can be generated and received by photoelectric sensor subject to；
D, laser emitter is irradiated towards the liquid level in water-bath just in the evaporative flask of heating water bath, in evaporative flask
Liquid level by laser generate reflection, the laser reflected can by photoelectric sensor receive generate current signal, current signal pass
It transports to data terminal and carries out processing and show；
E, judge whether the residual liquid in Rotary Evaporators is evaporated, due to the mistake that evaporation process is a dynamic change
Journey, after liquid level changes, the laser irradiation after reflection on the photosensor when position can also occur with liquid level
Change and changes, after the sample to be evaporated in evaporative flask is evaporated, the position meeting of laser irradiation on the photosensor
It does not change in a short time, the optical signal received is converted to current signal by photoelectric sensor, then is transmitted to data end
End carries out operation and shows, thus, it is possible to be changed to judge in Rotary Evaporators according to the position data of laser on the photosensor
Whether sample to be evaporated is evaporated, and so as to determine the surplus of residual liquid in evaporimeter, reaches control evaporation process
Purpose.
Laser detector can be connected and fixed with the water-bath of Rotary Evaporators in heretofore described step c, or
It is fixedly connected with the motor of Rotary Evaporators.
The type of condenser pipe can be straight cold finger, spherical condensation tube or snakelike condensation in heretofore described step b
Pipe.
Photoelectric sensor can be array image sensor or line scan image sensor in heretofore described step e.
A kind of Liquid Residue in Rotary Evaporators is detected in conclusion provided by the present invention using optical detecting method
Body, can not only solve the problems, such as to rotate whether liquid in device is evaporated at present, and can accurately measure rotary evaporation
Whether the liquid in instrument has residue, has and is not easy to be disturbed, durable, and applicability is high, at low cost, it is easy to use the advantages that.
Compared with the aforementioned existing similar products, in a kind of Rotary Evaporators of the invention residual liquid optical detecting method
Can effective solution rotate the insufficient problem that can not be measured automatically present in device at present.
Present disclosure is further described with the following Examples, but present disclosure is not limited only to implement
Involved content in example.As described below is only the preferred embodiment of the present invention, and those skilled in the art are come
It says, without departing from the principle of the present invention, it is easy to which several improvements and modifications are made to the present invention, these improvement and modification
It also falls within the protection scope of the claims of the present invention.
Description of the drawings
Fig. 1 is a kind of schematic diagram of the optical detecting method of residual liquid in Rotary Evaporators in embodiment.
Fig. 2 is the laser detection arrived involved in the optical detecting method of residual liquid in a kind of Rotary Evaporators in embodiment
The schematic diagram of device.
Fig. 3 is the rotary evaporation arrived involved in the optical detecting method of residual liquid in a kind of Rotary Evaporators in embodiment
The schematic diagram of instrument and laser detector.
Reference numeral：1- water-baths, 2- evaporative flasks, 3- motors, 4- condenser pipes, 5- laser emitters, 6- photoelectric sensors.
Specific implementation mode
As shown in Figures 1 to 3, in the present embodiment in a kind of Rotary Evaporators residual liquid optical detecting method, feature
It is to follow the steps below：
A, the Rotary Evaporators and laser detector, wherein Rotary Evaporators have at least been used during optical detection to include
Water-bath, evaporative flask, motor and condenser pipe；Laser detector includes laser emitter and photoelectric sensor；
B, the water-bath is located at the lower section of the evaporative flask, and the purpose is to the carry out heating water baths to evaporative flask；It is described
Motor is located at evaporative flask bottle mouth position, the purpose is to rotate evaporative flask, so that evaporative flask is rotated and improves evaporation efficiency；The condenser pipe
It is connected with the bottleneck of evaporative flask, the purpose is to the gas after evaporation is condensed and collected；
C, in the laser detector, laser emitter and photoelectric sensor are located at the both sides of water-bath, adjust
The incident angle of whole laser emitter, can allow laser caused by laser emitter that can be radiated at the liquid level in evaporative flask
On, reflection can be generated and received by photoelectric sensor subject to；
D, laser emitter is irradiated towards the liquid level in water-bath just in the evaporative flask of heating water bath, in evaporative flask
Liquid level by laser generate reflection, the laser reflected can by photoelectric sensor receive generate current signal, current signal pass
It transports to data terminal and carries out processing and show；
E, judge whether the residual liquid in Rotary Evaporators is evaporated, due to the mistake that evaporation process is a dynamic change
Journey, after liquid level changes, the laser irradiation after reflection on the photosensor when position can also occur with liquid level
Change and changes, after the sample to be evaporated in evaporative flask is evaporated, the position meeting of laser irradiation on the photosensor
It does not change in a short time, the optical signal received is converted to current signal by photoelectric sensor, then is transmitted to data end
End carries out operation and shows, thus, it is possible to be changed to judge in Rotary Evaporators according to the position data of laser on the photosensor
Whether sample to be evaporated is evaporated, and so as to determine the surplus of residual liquid in evaporimeter, reaches control evaporation process
Purpose.
Water-bath 1, evaporative flask 2, motor 3 and condenser pipe 4 are wherein contained in Rotary Evaporators, evaporative flask 2 selects circle
The evaporative flask 2 of shape pedestal, motor 3 select GB37-520-2435 dc motors, condenser pipe 4 to select serpentine condenser 4；Laser
Transmitter 5 selects the 730nm infrared semiconductor lasers of long spring thunder bodyguard Electro-optical Technology, INC. (US) 62 Martin Road, Concord, Massachusetts 017, model MW-I R-730/1
~1500mW, photoelectric sensor 6 select the line scan image sensor (line array CCD) of Sony's production, model I LX128MA.
The principle of the present invention figure is as shown in Figure 1, laser emitter 5 to liquid surface-emission laser, can be sent out when being contacted with liquid level
Raw reflection, according to mirror-reflection theorem it is found that ∠ 1=∠ 2, and incidence angle is equal to angle of reflection, and the laser irradiation of reflection is in photoelectricity
Optical signal is obtained on sensor 6, laser emitter 5 and the laser irradiation after reflection can be calculated in signal transmission to data terminal
The distance L of position on line array CCD；With revolving instrument operational process in, when the liquid level of liquid level 1 drops to liquid level 2,
H` ＞ H, incident ray light path is elongated, therefore the light path of reflection light also can be elongated, and the laser irradiation of reflection is on line array CCD
Position can also shift to the right, then L` ＞ L；Because distillation is a process persistently changed, the laser irradiation of reflection
Position on photoelectric sensor 6 is to continue variation, and after the liquid in evaporative flask 2 is evaporated, the height of liquid level will not be sent out
Changing, therefore position of the laser reflected on photoelectric sensor 6 will not change for a period of time, to can determine whether to evaporate
Liquid in bottle 2 is evaporated.
In conjunction with Fig. 2, Fig. 3 specific steps that the present invention is further explained.First by the water-bath of laser detector and revolving instrument
Pot 1 is connected and is fixed, and the incident angle of adjustment laser emitter 5 is 45 °, and light path caused by laser emitter can
By generating transmitting light on evaporative flask 2 and the liquid level that is radiated in evaporative flask 2, and ensure when there is no liquid in evaporative flask 2,
The position that reflected light is radiated at photoelectric sensor 6 is the maximum distance that laser emitter 5 can be received with photoelectric sensor 6,
The purpose is to when, there are when liquid, the position of reservation reflector light can be received by photoelectric sensor 6 in evaporative flask 2；Photoelectric transfer
The reflected light signal of receiving can be converted to current signal by sensor 6, and is transmitted to data terminal and is shown and operated, can
Intuitively to observe the change of position when reflected light is radiated on photoelectric sensor 6；Open revolving instrument and laser detector
Switch, motor 3 start drive evaporative flask 2 rotated, 1 temperature rise of water-bath, laser emitter 5 generate laser optical path,
It is radiated in evaporative flask 2 and waits on steaming liquid face, generate reflected light and be radiated on photoelectric sensor 6；Not with 1 temperature of water-bath
Disconnected to increase, the fluid temperature in evaporative flask 2 also raises simultaneously, and when the temperature in evaporative flask 2 is higher than when the boiling point of steaming liquid body, waits for
Steaming liquid body starts to evaporate, the gas of generation flow at the condenser pipe 4 that 2 bottleneck of evaporative flask is connected by evaporative flask 2 carry out it is cold
Solidifying processing, condensed liquid are stored in the lower section receiving flask of condenser pipe 4；With waiting for that steaming liquid body constantly evaporates, steaming liquid body is waited for
Liquid level can also continue to decline, reflected light of the laser irradiation on waiting for steaming liquid face that laser emitter 5 generates can also continue to occur
Change in displacement to the right, after being evaporated completely after steaming liquid body, reflected light can for a long time not on the position of photoelectric sensor 6
It changes, when lasting 5mi n reflected lights do not change on the position of photoelectric sensor 6, you can think to wait for steaming liquid
Body is evaporated completely.
Claims (4)
1. the optical detecting method of residual liquid in a kind of Rotary Evaporators, it is characterized in that following the steps below：
A, Rotary Evaporators and laser detector have at least been used during optical detection, wherein Rotary Evaporators include water-bath
Pot, evaporative flask, motor and condenser pipe；Laser detector includes laser emitter and photoelectric sensor；
B, the water-bath is located at the lower section of the evaporative flask, and the purpose is to the carry out heating water baths to evaporative flask；The motor
Positioned at evaporative flask bottle mouth position, the purpose is to rotate evaporative flask, so that evaporative flask is rotated and improve evaporation efficiency；The condenser pipe and steaming
The bottleneck of hair bottle is connected, and the purpose is to the gas after evaporation is condensed and collected；
C, in the laser detector, laser emitter and photoelectric sensor are located at the both sides of water-bath, and adjustment swashs
The incident angle of optical transmitting set, can allow laser caused by laser emitter that can be radiated on the liquid level in evaporative flask, energy
It is enough generate reflection and received by photoelectric sensor subject to；
D, laser emitter is irradiated towards the liquid level in water-bath just in the evaporative flask of heating water bath, the liquid in evaporative flask
Face allows laser to generate reflection, and the laser reflected can be received by photoelectric sensor and generate current signal, and current signal transfer is extremely
Data terminal carries out processing and shows；
E, judge whether the residual liquid in Rotary Evaporators is evaporated, since evaporation process is the process of a dynamic change,
After liquid level changes, the laser irradiation after reflection on the photosensor when position can also change with liquid level
And change, after the sample to be evaporated in evaporative flask is evaporated, the position of laser irradiation on the photosensor can be short
Do not change in time, the optical signal received is converted to current signal by photoelectric sensor, then be transmitted to data terminal into
Row operation display, thus, it is possible to be changed to judge to wait steaming in Rotary Evaporators according to the position data of laser on the photosensor
Whether the sample of hair is evaporated, and so as to determine the surplus of residual liquid in evaporimeter, reaches the mesh of control evaporation process
's.
2. the optical detecting method of residual liquid in a kind of Rotary Evaporators as described in claim 1, it is characterized in that the step
Laser detector can be connected and fixed with the water-bath of Rotary Evaporators in rapid c, or be fixed with the motor of Rotary Evaporators
Connection.
3. the optical detecting method of residual liquid in a kind of Rotary Evaporators as described in claim 1, it is characterized in that the step
The type of condenser pipe can be straight cold finger, spherical condensation tube or serpentine condenser in rapid b.
4. the optical detecting method of residual liquid in a kind of Rotary Evaporators as described in claim 1, it is characterized in that the step
Photoelectric sensor is array image sensor or line scan image sensor in rapid e.
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| CN201810102954.1A CN108398428A (en) | 2018-02-01 | 2018-02-01 | The optical detecting method of residual liquid in a kind of Rotary Evaporators |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110559676A (en) * | 2019-08-29 | 2019-12-13 | 南通东概念新材料有限公司 | System and method for monitoring volume of rotary evaporation liquid in real time by using laser calibration method |
| CN112229479A (en) * | 2020-09-30 | 2021-01-15 | 广东工业大学 | Non-contact type transparent liquid canning height detection and type identification device and method |
| WO2021092717A1 (en) * | 2019-11-11 | 2021-05-20 | 南通东概念新材料有限公司 | System and method for monitoring volume of rotary evaporation liquid in real time using laser calibration method |
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| CN206823201U (en) * | 2017-02-13 | 2018-01-02 | 上海再启生物技术有限公司 | Rotary Evaporators |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110559676A (en) * | 2019-08-29 | 2019-12-13 | 南通东概念新材料有限公司 | System and method for monitoring volume of rotary evaporation liquid in real time by using laser calibration method |
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