Device for observing droplets

Abstract

The present application relates to experimental equipment technical field, the present application provides a kind of device for observing droplet, comprising: droplet injection component, support component, acquisition component, droplet injection component is used to generate droplet, droplet injection component includes first light source emitter, the drop direction of droplet is identical with the light emitting direction of first light ray emitted by first light source emitter support component one end connects droplet injection component, the other end of support component connects object table, and object table is used to support light spot sensor;Acquisition component is used to obtain the image of droplet drop in light spot sensor, and acquisition component is connected with light spot sensor communication;Based on the position signal of first light ray received by light spot sensor, control acquisition component moves to the acquisition position matched position signal.The light emitting direction of first light ray is the drop direction of droplet, so as to accurately position the predetermined position of droplet drop in light spot sensor;Acquisition component can accurately position to acquisition position, realize droplet image acquisition.

Description

Technical Field

[0001] This invention relates to the field of experimental equipment technology, and in particular to a device for observing liquid droplets. Background Technology

[0002] Droplet impaction and dispersion are complex fluid dynamics and chemical phenomena involving both microscopic and macroscopic scales. The impaction process becomes even more complex when droplets contain components that can trigger chemical reactions, due to the close interaction between chemical and physical processes. To fully understand the physical and chemical mechanisms underlying reactive droplet impaction, it is necessary not only to precisely control and observe droplet formation and impact processes but also to ensure that they impact precisely at predetermined locations. Particularly in high-precision applications, the droplet's position, size, and impact velocity can significantly influence its reaction behavior.

[0003] When observing droplet collisions, it is usually necessary to ensure that the droplet lands at a predetermined location. However, existing devices for observing droplet landing suffer from problems such as the droplet's difficulty in accurately landing at the designated location on the substrate, and the complexity and cumbersome process of locating the designated location. Furthermore, when using a camera to observe the droplet collision process, it is difficult to achieve precise alignment of the camera with the designated location. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the related art. To this end, the present invention provides an apparatus for observing droplets, which can not only accurately generate and control the reaction droplets, but also ensure that the droplets fall precisely to a predetermined position, and perform high-resolution observation of the entire impact process.

[0005] An apparatus for observing droplets according to an embodiment of the present invention includes:

[0006] A droplet injection component for generating droplets, the droplet injection component including a first light source emitter, wherein the droplet falling direction is the same as the light emission direction of a first light emitted by the first light source emitter;

[0007] A support component, one end of which is connected to the droplet injection component, and the other end of which is connected to a stage, the stage being used to support the light spot sensor;

[0008] A data acquisition component is used to acquire an image of the droplet falling onto the light spot sensor, and the data acquisition component is communicatively connected to the light spot sensor;

[0009] Based on the position signal of the first light received by the spot sensor, the acquisition component is controlled to move to an acquisition position that matches the position signal.

[0010] According to one embodiment of the present invention, the droplet injection component includes a droplet nozzle and a liquid filling assembly. The outlet of the liquid filling assembly faces the liquid inlet at one end of the droplet nozzle, and the other end of the droplet nozzle is provided with a spray port. The first light source emitter is connected to the droplet nozzle and is coaxially arranged with the spray port so that the first light is emitted from the spray port.

[0011] According to one embodiment of the present invention, the droplet nozzle includes:

[0012] A liquid inlet section is provided to form a liquid inlet channel, and the liquid inlet is provided at one end of the liquid inlet channel;

[0013] The spray section forms a spray channel, the spray section is connected to the liquid inlet section, the spray channel is connected to the other end of the liquid inlet channel, and a spray port is provided at the end of the spray channel away from the liquid inlet channel;

[0014] A stirring rod is inserted into the spray channel and is coaxially arranged with the spray channel. The stirring rod is connected to the first light source emitter, and the end of the stirring rod faces the spray nozzle. The stirring rod includes a rod body with a light-transmitting structure.

[0015] According to one embodiment of the present invention, the liquid addition assembly is provided with a plurality of liquid addition chambers, the droplet nozzle is provided with a plurality of liquid inlets, the liquid addition chambers and the liquid inlets correspond one-to-one, and the outer wall of the stirring rod is provided with a guide groove, the guide groove being arranged around the stirring rod multiple times.

[0016] According to one embodiment of the present invention, it further includes: a blocking member connected to the supporting member, wherein the liquid receiving plate of the blocking member is movable between an initial position that avoids the first light and a blocking position that blocks the first light.

[0017] According to one embodiment of the present invention, a triggering component is further included, wherein the blocking component is communicatively connected to the triggering component, and the liquid receiving tray is controlled to switch from the initial position to the blocking position based on the triggering component receiving a trigger signal of the droplet passing through a set number of times.

[0018] According to one embodiment of the present invention, the triggering component includes a second light source emitter and a light intensity sensor. The light intensity sensor is used to receive the light signal of the second light emitted by the second light source emitter. The second light source emitter and the light intensity sensor are respectively disposed on both sides of the first light, and the light emission direction of the second light source emitter intersects with the light emission direction of the first light source emitter.

[0019] According to one embodiment of the present invention, the blocking component further includes a rotating console, a driving device is disposed inside the housing of the rotating console, the output shaft of the driving device is connected to the liquid receiving tray via a cantilever, and the output shaft rotates to drive the liquid receiving tray to rotate between the initial position and the blocking position.

[0020] According to one embodiment of the present invention, the acquisition component includes a high-speed camera and a third light source emitter that provides a background light source for the high-speed camera. The high-speed camera and the third light source emitter are respectively disposed on both sides of the stage. A three-axis displacement stage is connected to the bottom of the high-speed camera. The three-axis displacement stage is communicatively connected to the spot sensor. The three-axis displacement stage adjusts the position of the high-speed camera in the horizontal, vertical, and longitudinal directions so that the high-speed camera is aligned with the acquisition position.

[0021] According to one embodiment of the present invention, the bottom of the spot sensor is rotatably connected to a plurality of adjustment columns, which are used to adjust the angle between the spot sensor and the surface of the stage.

[0022] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0023] The droplet observation device provided in this embodiment of the invention includes a droplet injection component for generating droplets. The droplet injection component is equipped with a first light source emitter. The direction of the first light emitted by the first light source emitter is the droplet falling direction, enabling precise positioning of the droplet's falling path and its landing at a predetermined position on the light spot sensor, ensuring accurate droplet landing at the predetermined location. Simultaneously, the light spot sensor is communicatively connected to a data acquisition component. When the first light shines on the light spot sensor, the sensor receives a position signal from the first light. The data acquisition component moves to a data acquisition position matching this position signal, which is the predetermined droplet falling position. This allows the data acquisition component to accurately locate the data acquisition position and acquire images of the entire process of the droplet falling onto the light spot sensor.

[0024] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted by the present invention, and the advantages brought about by the technical solutions with these technical features as described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure for observing droplets provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the droplet injection component provided in an embodiment of the present invention.

[0028] Figure label:

[0029] 100. Droplet injection component; 110. First light source emitter; 120. Droplet nozzle; 121. Liquid inlet; 1211. Liquid inlet channel; 1212. Liquid inlet; 122. Spraying section; 1221. Spraying channel; 1222. Spray nozzle; 130. Liquid addition assembly; 131. Outlet; 132. Liquid addition chamber; 140. Stirring rod; 141. Flow guide groove; 151. Injection pump; 152. Injection pump controller; 160. Bolt; 170. Push rod;

[0030] 200. Support component; 210. Stage; 220. Spot sensor; 221. Adjustment column;

[0031] 300. Acquisition component; 310. High-speed camera; 311. Zoom lens; 320. Third light source emitter; 330. Three-axis displacement stage;

[0032] 400. Blocking component; 410. Liquid receiving tray; 420. Rotary control console; 430. Output shaft; 440. Cantilever;

[0033] 500. Triggering component; 510. Second light source emitter; 520. Light intensity sensor;

[0034] 600. Mobile platform;

[0035] 700. Box body. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0037] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0039] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0041] The following is combined Figures 1-2 This invention describes an apparatus for observing droplets provided in an embodiment of the invention.

[0042] refer to Figure 1 As shown, the device for observing droplets provided in this embodiment of the invention includes: a droplet injection component 100, a support component 200, and a collection component 300. The droplet injection component 100 is used to generate droplets and includes a first light source emitter 110. The droplet falling direction is the same as the light emission direction of the first light emitted by the first light source emitter 110. One end of the support component 200 is connected to the droplet injection component 100, and the other end of the support component 200 is connected to a stage 210. The stage 210 is used to support a light spot sensor 220. The collection component 300 is used to acquire an image of the droplet falling on the light spot sensor 220 and is communicatively connected to the light spot sensor 220. Based on the position signal of the first light received by the light spot sensor 220, the collection component 300 is controlled to move to a collection position that matches the position signal.

[0043] The device for observing droplets provided in this embodiment of the invention includes a droplet injection component 100 for generating droplets. The droplet injection assembly is equipped with a first light source emitter 110. The direction of the first light emitted by the first light source emitter 110 is the droplet falling direction, enabling precise positioning of the droplet's falling path and its landing at a predetermined position on the light spot sensor 220, ensuring accurate droplet landing at the predetermined location. Simultaneously, the light spot sensor 220 is communicatively connected to a collection component 300. When the first light shines on the light spot sensor 220, the light spot sensor 220 receives a position signal from the first light. The collection component 300 moves to a collection position matching this position signal, which is the predetermined droplet falling position. This allows the collection component 300 to accurately locate the collection position and acquire images of the entire process of the droplet falling onto the light spot sensor 220.

[0044] In some other embodiments, the device for observing droplets also includes a moving platform 600, through which the droplet injection component 100 is connected to the support component 200. The moving platform 600 can move along the height direction of the support component 200 to adjust the distance between the droplet injection component 100 and the light spot sensor 220, thereby adjusting the droplet drop height to meet the needs of experiments with different droplet drop height requirements.

[0045] The droplet injection component 100 includes a droplet nozzle 120 and a liquid filling assembly 130. The outlet 131 of the liquid filling assembly 130 faces the liquid inlet 1212 at one end of the droplet nozzle 120. The other end of the droplet nozzle 120 is provided with a spray port 1222. A first light source emitter 110 is connected to the droplet nozzle 120 and is coaxially arranged with the spray port 1222 so that the first light is emitted from the spray port 1222. It is understandable that the droplet will be ejected and drip from the nozzle 1222. The light emission direction of the first light source emitter 110 passes through the nozzle 1222 and is emitted from the nozzle 1222 to form a light path. The droplet's falling direction is the same as the light emission direction of the first light emitted by the first light source emitter 110. That is, the droplet will move along the light path of the first light source. The light emission direction of the first light source emitter 110 indicates the droplet's landing point. Not only can the landing point of the droplet be observed in real time, but the landing position of the droplet can also be accurately located so as to monitor and adjust the droplet's ejection path and landing point in a timely manner.

[0046] By using a coaxial arrangement, the position of the first light beam is accurately aligned with that of the nozzle 1222, preventing the inner wall of the droplet nozzle 120 from blocking the first light beam. This helps to accurately control the direction of the first light beam as it passes through the nozzle 1222, ensuring that the first light beam illuminates along the desired path.

[0047] In some embodiments, the light spot sensor 220 is connected to a protective layer, which is connected above the light spot sensor 220. The protective layer is a light-transmitting layer. The protective layer can not only protect the light spot sensor 220 and prevent the reaction droplets from contaminating the light spot sensor 220, but also allow the first light to pass through and illuminate the light spot sensor 220, ensuring the normal use of the light spot sensor 220.

[0048] The protective layer can be glass, quartz, or a light-transmitting membrane structure, depending on the actual needs.

[0049] The structure of the droplet nozzle 120 will be described below.

[0050] refer to Figure 2As shown, the droplet nozzle 120 includes: a liquid inlet section 121, a spray section 122, and a stirring rod 140. The liquid inlet section 121 forms a liquid inlet channel 1211, and a liquid inlet 1212 is provided at one end of the liquid inlet channel 1211. The spray section 122 forms a spray channel 1221, and the spray section 122 is connected to the liquid inlet section 121. The spray channel 1221 is connected to the other end of the liquid inlet channel 1211, and a spray port 1222 is provided at the end of the spray channel 1221 away from the liquid inlet channel 1211. The stirring rod 140 is inserted into the spray channel 1221 and is coaxially arranged with the spray channel 1221. The stirring rod 140 is connected to the first light source emitter 110, and the end of the stirring rod 140 faces the spray port 1222. The stirring rod 140 includes a rod body with a light-transmitting structure.

[0051] In this embodiment, a stirring rod 140 is provided in the droplet nozzle 120. The stirring rod 140 is inserted into the spray channel 1221 and can stir the liquid in the droplet nozzle 120. When the liquid is a high-viscosity, non-Newtonian fluid or reactive liquid, the stirring of the stirring rod 140 can improve its fluidity and stabilize the liquid flow, which can ensure the stability of the droplets falling from the spray port 1222 and avoid the droplet nozzle 120 from being blocked.

[0052] It should be noted that the reaction liquid (which can also be understood as the reaction droplet) can be understood as a liquid (droplet) that undergoes a chemical reaction itself or with the surrounding environment, such as epoxy resin, 502 glue, etc.

[0053] Combination Figure 1 The first light source emitter 110 is disposed at one end of the stirring rod 140. Simultaneously, the first light source emitter 110 is positioned outside the spray section 122, preventing liquid from entering the first light source emitter 110 and affecting it. The stirring rod 140 includes a light-transmitting rod body, ensuring that light from the first light source emitter 110 passes through the drive shaft, reducing light obstruction by the stirring rod 140, thereby improving positioning accuracy.

[0054] Of course, the first light source emitter 110 can also be located inside the stirring rod 140. In this case, the stirring rod 140 is a light-transmitting structure, and a cavity for installing the first light source emitter 110 is formed inside the stirring rod 140, thus eliminating the need to provide additional installation space for the first light source emitter 110, resulting in a compact structure and saving volume. The first light source emitter 110 can also be located at the bottom of the stirring rod 140, and the first light source emitter 110 is sealed to the stirring rod 140 through a connector to prevent liquid from entering the first light source emitter 110 and causing interference. The setting of the first light source emitter 110 can be set according to actual needs and is not limited here. The connection of the first light source emitter 110 to the stirring rod 140 can reduce the interference of external environmental factors on the light, improve the stability and repeatability of the experiment; at the same time, the emission direction of the first light from the first light source emitter 110 passes through the stirring rod 140, that is, in this embodiment, the optical path is integrated into the stirring rod 140, which can reduce the complexity of the light path of the first light, reduce light loss, improve the transmission efficiency of the first light, and improve the positioning effect of the droplet.

[0055] The liquid addition assembly 130 is provided with multiple liquid addition chambers 132, and the droplet nozzle 120 is provided with multiple liquid inlets 1212. The liquid addition chambers 132 and the liquid inlets 1212 correspond one-to-one. The droplet nozzle 120 is provided with multiple liquid inlets 1212, that is, multiple liquid inlet channels 1211 are provided. The multiple liquid inlet channels 1211 are connected to the spray channel 1221. When the liquid components in the multiple liquid inlet channels 1211 are different, that is, the liquid in the spray channel 1221 is a synthetic liquid composed of multiple liquids with different components, the stirring paddle is inserted in the spray channel 1221, which can make the liquids with different components fully mixed and improve the quality of the synthetic liquid in the spray channel 1221. For example, some special resins or synthetic solvents can have different components of liquid (such as resin, hardener, diluent, etc.) placed in multiple liquid inlet channels 1211. After the various liquids with different components are fully stirred and mixed by the stirring rod 140, they enter the spray channel 1221. During the mixing process, the various liquids with different components undergo chemical reactions to form special resins or synthetic solvents.

[0056] The liquid addition chamber 132 and the liquid inlet 1212 are in one-to-one correspondence, which can effectively prevent cross-contamination between different liquids and maintain the purity of the sample and the accuracy of the experiment.

[0057] It should be noted that when the liquid nozzle includes multiple liquid inlet channels 1211, the liquid components in the multiple liquid inlet channels 1211 can be different, the same, or some can be the same and some can be different. The liquid components in the multiple liquid inlet channels 1211 can be selected according to actual needs.

[0058] Combination Figure 1The outer wall of the stirring rod 140 is provided with a guide groove 141, which wraps around the stirring rod 140 multiple times. When liquid flows from the inlet channel 1211 to the spray channel 1221, the droplets flow along the guide groove 141, thus agitating the liquid on the stirring rod 140. Multiple inlet channels 1211 are provided in the droplet nozzle 120. When the liquids in the multiple inlet channels 1211 have different compositions, the liquids with different compositions flow along the guide groove 141 and mix simultaneously, thereby achieving the generation of a synthesized liquid in the spray channel 1221. Simultaneously, the guide groove 141 wraps around the stirring rod 140 multiple times, making the stirring and mixing more uniform and helping to ensure the uniformity of the reaction or mixing process. The synthesis of the reaction liquid can be achieved simultaneously with the liquid flowing towards the spray nozzle 1222, eliminating the need to wait for the liquid to be synthesized before entering the droplet nozzle 120, saving experimental time and improving experimental efficiency.

[0059] The droplet nozzle 120 is provided with multiple liquid inlets 1212, that is, multiple liquid inlet channels 1211 are provided. The multiple liquid inlet channels 1211 are connected to the spray channel 1221. The liquid components in the multiple liquid inlet channels 1211 can be different, the same, or some can be the same and some can be different. The liquid components in the multiple liquid inlet channels 1211 can be selected according to actual needs.

[0060] The stirring rod 140 can be a threaded rod, and the guide groove 141 can be threaded. The stirring rod 140 has a simple structure and can effectively stir and mix the liquid. By adjusting the size, spacing, and number of turns of the thread, that is, by adjusting the size, spacing, and number of turns of the guide groove 141, the speed and degree of stirring and mixing of the liquid can be adjusted. The guide groove 141 can be set according to the actual situation.

[0061] In some other embodiments, a baffle is provided inside the liquid inlet channel 1211. One end of the baffle is connected to the liquid inlet section 121, and the other end of the baffle is inclined downwards to effectively prevent liquid backflow. The other end of the baffle forms a liquid inlet with the inner wall of the liquid inlet section 121. The baffle not only prevents liquid backflow but also ensures that liquid can enter from the liquid inlet, effectively ensuring the input of liquid and thus ensuring the stability of liquid flow.

[0062] The device for observing droplets also includes a blocking component 400, which is connected to the support component 200. The liquid-receiving plate 410 of the blocking component 400 can move between an initial position that avoids the first light beam and a blocking position that blocks the first light beam. When the liquid-receiving plate 410 is in the initial position, it avoids the first light beam, and the droplet falls onto the light spot sensor 220 without obstruction along the light emission direction of the first light beam. When the liquid-receiving plate 410 is in the blocking position, it can be understood that the liquid-receiving plate 410 is located between the first light source emitter 110 and the light spot sensor 220, and it blocks the first light beam. At this time, the first light beam shines on the liquid-receiving plate 410 but does not shine on the light spot sensor 220. The droplet falls onto the liquid-receiving plate 410, thereby preventing subsequent droplets from falling onto the light spot sensor 220 and affecting the collision experiment of the previous droplet on the light spot sensor 220.

[0063] The device for observing droplets also includes a triggering component 500. A blocking component 400 is communicatively connected to the triggering component 500. Based on the triggering component 500 receiving a set number of trigger signals indicating that a droplet has passed through, the device controls the receiving tray 410 to switch from its initial position to the blocking position. It can be understood that each droplet falling triggers a trigger signal from the triggering component 500, and each trigger signal is considered a droplet falling. When the set number of droplet falls is reached, the receiving tray 410 is controlled to switch from its initial position to the blocking position to prevent subsequent droplets from affecting the preceding droplets.

[0064] Taking one set number of times as an example, when a droplet falls once (assuming the droplet falling at this time is droplet A), the triggering component 500 is triggered once. The triggering component 500 generates a trigger signal, which controls the liquid receiving tray 410 to switch from the initial position to the blocking position. At this time, droplet A has passed the blocking position of the liquid receiving tray 410. Droplet A will continue to move downward until it falls on the light spot sensor 220. At the same time, the liquid receiving tray 410 moves to the blocking position, which can prevent subsequent droplets from falling on the light spot sensor 220 and affecting droplet A.

[0065] Of course, the number of times can be set is not limited to once; it can also be twice, meaning the droplet passes through the trigger component 500 twice before controlling the liquid receiving plate 410 to switch from the initial position to the blocking position. The number of times can also be set three, four, etc., and can be selected according to actual needs.

[0066] The triggering component 500 includes a second light source emitter 510 and a light intensity sensor 520. The light intensity sensor 520 receives the light signal of the second light emitted by the second light source emitter 510. The second light source emitter 510 and the light intensity sensor 520 are respectively disposed on both sides of the first light source, and the light emission direction of the second light source emitter 510 intersects with the light emission direction of the first light source emitter 110. The light intensity sensor 520 receives the light signal of the second light emitted by the second light source emitter 510 and outputs a trigger signal when the light signal changes. When a droplet falls and passes the second light source, the area of ​​the droplet blocking the second light source changes from small to large and then back to small. Correspondingly, the light intensity on the surface of the light intensity sensor 520 (i.e., the light signal of the second light source) changes from strong to weak and then back to strong. At this time, the light intensity sensor 520 emits a trigger signal. When the light intensity sensor 520 receives a weak light signal, it emits a trigger signal. It is understandable that the droplet falls in the same direction as the light emission direction of the first light source emitter 110, and the light emission direction of the second light source emitter 510 intersects with the light emission direction of the first light source emitter 110. The positioning of the droplet and the triggering component 500 is simple, and the movement path of the droplet can be accurately located before the experiment begins, ensuring that the droplet passes through the second light source. This ensures that the triggering component 500 can accurately detect the number of times the droplet passes through, thus guaranteeing the experimental effect.

[0067] The blocking component 400 also includes a rotary console 420. A drive device is housed within the housing of the rotary console 420. The output shaft 430 of the drive device is connected to the liquid receiving tray 410 via a cantilever 440. Rotation of the output shaft 430 causes the liquid receiving tray 410 to rotate between its initial position and its blocking position. It is understood that when the triggering component 500 is communicatively connected to the rotary console 420, after the droplet has passed through a set number of times, the triggering component 500 sends a trigger signal to the rotary console 420. Upon receiving the trigger signal, the rotary console 420 controls the output shaft 430 to rotate, thereby causing the cantilever 440 connected to the output shaft 430 to rotate. The cantilever 440 is connected to the liquid receiving tray 410, thus causing the liquid receiving tray 410 to rotate from its initial position to its blocking position. Of course, when the droplet needs to be used in an experiment, the rotary console 420 controls the drive output shaft 430 to rotate, causing the cantilever 440 to rotate, thereby causing the liquid receiving tray 410 to rotate from its blocking position to its initial position. The blocking component 400 has a simple structure, and the rotary console 420 can precisely control the position of the liquid receiving tray 410, enabling it to rotate accurately between the initial position and the blocking position, which helps to ensure the avoidance and blocking of the first beam of light. At the same time, placing the drive device inside the housing of the rotary console 420 not only saves the additional installation space required for the drive device, but also makes the blocking component compact and avoids the influence of external environmental factors on the drive device.

[0068] In some embodiments, the device for observing droplets further includes a moving platform 600, and the blocking member 400 is connected to the support member 200 through the moving platform 600. When the moving platform 600 moves along the height direction of the support member 200, it can drive the blocking member 400 to move, thereby adjusting the height position of the blocking member 400.

[0069] When the device for observing droplets also includes a moving platform 600, the droplet injection component 100 and the blocking component 400 can both be connected to the support component 200 via the moving platform 600. The moving platform 600 moves along the height direction of the support component 200 so that the droplet injection component 100 and the blocking component 400 move synchronously.

[0070] The acquisition unit 300 includes a high-speed camera 310 and a third light source emitter 320 that provides a background light source for the high-speed camera 310. The high-speed camera 310 and the third light source emitter 320 are respectively disposed on both sides of the stage 210. A three-axis displacement stage 330 is connected to the bottom of the high-speed camera 310. The three-axis displacement stage 330 is communicatively connected to the spot sensor 220. The three-axis displacement stage 330 adjusts the position of the high-speed camera 310 in the horizontal, vertical, and lateral directions to align the high-speed camera 310 with the acquisition position. The three-axis displacement stage 330 is communicatively connected to the spot sensor 220. When the spot sensor 220 receives the light signal of the first light irradiation, it can locate the spot position of the first light irradiation (that is, the predetermined position of the droplet falling) and send this position signal to the three-axis displacement stage 330. The three-axis displacement stage 330 controls the high-speed camera 310 to make fine adjustments and movements in the horizontal, vertical, and lateral directions, so that the high-speed camera 310 can move to the acquisition position aligned with the spot position. In other words, the three-axis displacement stage 330 can drive the high-speed camera 310 to adjust its position in the front-back, up-down, and left-right directions. The high-speed camera 310 can make real-time adjustments according to the droplet's falling position, effectively improving experimental flexibility and efficiency, and can accurately align with the light spot position, thus improving the accuracy of droplet image acquisition.

[0071] The third light source emitter 320 provides a background light source for the high-speed camera 310. The background light source can reduce shadows and improve the visibility of droplets, effectively improving the quality and clarity of liquid images and helping to capture images better.

[0072] The bottom of the light spot sensor 220 is rotatably connected to multiple adjusting columns 221, which are used to adjust the angle between the light spot sensor 220 and the surface of the stage 210. It can be understood that the stage 210 is used to place the light spot sensor 220. Taking a horizontal surface as an example, the multiple adjusting columns 221 support the light spot sensor 220 and can adjust the angle between the light spot sensor 220 and the surface of the stage 210, i.e., adjust the angle with the horizontal plane. This adapts to the angle requirements of different experiments where droplets collide with the light spot sensor 220 at different angles, thus meeting experimental needs under different conditions without requiring replacement or reinstallation of the light spot sensor 220.

[0073] Of course, the included angle can be 0 degrees, in which case the surface of the light spot sensor 220 is a horizontal plane; or it can be greater than 0 degrees and less than 90 degrees. The included angle can be selected according to actual needs.

[0074] Below, in conjunction with Figure 1 The apparatus for observing droplets provided in the embodiments of the present invention will be described.

[0075] like Figure 1 As shown, a test platform (a device for observing droplets) is built. The device for observing droplets mainly consists of four parts: a droplet injection component 100, a blocking component 400, a collection component 300, and a support component 200.

[0076] The droplet injection component 100 comprises a single-channel injection pump 151, an injection pump controller 152, a syringe (liquid dispensing assembly 130), a needle (droplet nozzle 120), and a Z-axis electric displacement stage (moving platform 600). The injection pump 151 is fixed to the moving platform 600 by bolts 160, and a syringe needs to be installed on the injection pump 151.

[0077] The specific structure of the syringe is as follows Figure 2 As shown, the syringe includes a needle with a light-transmitting screw (stirring rod 140), a light source device (first light source emitter 110) above the screw, a double-chamber syringe (the chamber is the liquid addition chamber 132), and a plunger 170.

[0078] The end of the light-transmitting screw that contacts the light source device is flat, and the other end is spherical. This allows the light emitted from the light source device to pass through the light-transmitting screw and be focused by the spherical cap before being emitted from the tip of the needle, forming a light spot on the light spot sensor 220.

[0079] When the synthesized droplet requires two different liquids, chambers A and B of the syringe are filled with liquids of different components; if the droplet is a single component, the liquids in chambers A and B are the same. The syringe pump 151 pushes the liquid in the chamber into the needle tip through the push rod 170, and mixes it through the light-transmitting screw.

[0080] The specific design of the blocking component 400 is as follows: Figure 1 As shown, its components include a laser (second light source emitter 510), a light intensity sensor 520, a rotating control console 420, a cantilever 440, and a liquid receiving tray 410.

[0081] The blocking component 400 and the syringe pump 151 are fixed on the moving platform 600, and the liquid receiving tray 410 is located below the needle tip. The laser emits a laser beam that falls onto the light intensity sensor 520, and the laser beam path intersects with the light beam emitted from the needle tip.

[0082] The light intensity sensor 520 is connected to the rotary control console 420 as a trigger. When the light intensity on the surface of the light intensity sensor 520 changes drastically, it outputs an excitation signal. In the initial state, when the laser beam strikes the light intensity sensor 520, there is no change in light intensity. The liquid receiving tray 410 and the needle maintain a certain distance (at this time, the liquid receiving tray 410 is in its initial position, avoiding the emission direction of the first light beam), meaning that the liquid receiving tray 410 does not affect the light emitted from the needle from illuminating the light spot sensor 220.

[0083] As the droplet forms and falls at the needle tip, the light intensity on the surface of the light intensity sensor 520 changes from strong to weak and then back to strong. At this point, the light intensity sensor 520 emits a trigger signal. After the rotary control console 420 is triggered, it controls the drive shaft to rotate by a certain angle, which drives the liquid receiving tray 410 through the cantilever 440. This causes the liquid receiving tray 410 to rotate directly below the needle tip, meaning that the vertical projection of the needle tip falls into the tray, preventing subsequent droplets from falling onto the light spot sensor 220.

[0084] The other end of the support component 200 is connected to the stage 210, which supports the light spot sensor 220 covered by a light-transmitting material (such as glass). The light spot sensor 220 can determine the position of the light spot of the first light ray falling on the surface (the light spot sensor 220 receives the position signal of the first light ray) and send a signal to the three-axis displacement stage 330.

[0085] The high-speed camera mechanism (acquisition unit 300) consists of a high-speed camera 310, a zoom lens 311, a three-axis displacement stage 330, and a high-intensity light source (third light source emitter 320). The high-speed camera 310 begins recording images after receiving a signal from the light intensity sensor 520. The three-axis displacement stage 330 begins operating after receiving a signal from the spot sensor 220, moving the camera's focal plane to the location of the spot (that is, controlling the acquisition unit 300 to move to the acquisition position matching the position signal).

[0086] The droplet injection component 100 (excluding the injection pump controller 152), the blocking component 400, the stage 210, and the spot sensor 220 are all placed inside the transparent enclosure 700 to prevent airflow from interfering with the observation process.

[0087] The measurement process of the device for observing droplets according to an embodiment of the present invention will be described below.

[0088] (1) The liquid to be tested is loaded into a syringe, and the first light source emitter 110 on the droplet nozzle 120 is turned on so that the first light emitted by the first light source emitter 110 shines on the light spot sensor.

[0089] (2) Turn on the second light source emitter 510. The second light emitted by the second light source emitter 510 is projected onto the light intensity sensor 520. At this time, the liquid receiving plate 410 is in the initial position.

[0090] (3) Adjust the moving platform 600 so that the distance between the nozzle 1222 of the droplet nozzle 120 and the light spot sensor 220 reaches a specified height; wherein, the surface of the light spot sensor 220 is covered with a light-transmitting layer, which can be glass, or it can be understood that the moving platform 600 is adjusted so that the distance between the nozzle 1222 of the droplet nozzle 120 and the glass substrate (glass light-transmitting layer) reaches a specified height;

[0091] (4) Start the spot sensor 220, the third light source emitter 320, the high-speed camera 310 and the three-axis displacement stage 330. Move the high-speed camera 310 to the acquisition position and complete the focusing according to the spot position on the spot sensor 220.

[0092] (5) Start the injection pump 151. The injection pump 151 squeezes the syringe plunger 170 to push out the liquid in the liquid addition chamber 132. The liquid enters the droplet nozzle 120 from the liquid inlet 1212 and finally generates droplets at the spray nozzle 1222 of the droplet nozzle 120 and drips from the tip of the needle (i.e. the spray nozzle 1222).

[0093] (6) When the droplet passes through the second light, it triggers the light intensity sensor 520, the liquid receiving plate 410 rotates from the initial position to the blocking position, and the high-speed camera 310 begins to acquire images.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An apparatus for observing a droplet, characterized by, The application relates to a liquid drop injection device, which comprises the following components: a liquid drop injection component for generating liquid drops, wherein the drop falling direction of the liquid drops is the same as the light emitting direction of first light emitted by a first light source emitter; a support component, one end of which is connected with the liquid drop injection component, and the other end of which is connected with a stage for supporting a light spot sensor; a collection component for collecting images of the liquid drops falling on the light spot sensor, which is in communication connection with the light spot sensor; a position signal of the first light received by the light spot sensor is used to control the movement of the collection component to a collection position matching the position signal; the liquid drop injection component comprises a liquid drop nozzle and a liquid adding assembly, the outlet of the liquid adding assembly is directed to the liquid inlet of one end of the liquid drop nozzle, the other end of the liquid drop nozzle is provided with a jet port, the first light source emitter is connected with the liquid drop nozzle and coaxially arranged with the jet port to make the first light emitted from the jet port; the liquid drop nozzle comprises: a liquid inlet part for forming a liquid inlet channel, one end of the liquid inlet channel is provided with the liquid inlet; a jet part for forming a jet channel, the jet part is connected with the liquid inlet part, the jet channel is communicated with the other end of the liquid inlet channel, and the jet channel is provided with the jet port at one end away from the liquid inlet channel; a stirring rod, which is inserted into the jet channel, coaxially arranged with the jet channel, connected with the first light source emitter, and has an end directed to the jet port, and the stirring rod comprises a light-transmitting rod body. The liquid adding assembly is provided with a plurality of liquid adding cavities, the liquid drop nozzle is provided with a plurality of liquid inlets, the liquid adding cavities and the liquid inlets are one-to-one corresponding, and the outer wall of the stirring rod is provided with a flow guide groove, which is arranged around the stirring rod for multiple turns. The application further comprises: a blocking component connected with the support component, and a liquid receiving disc of the blocking component is movable between an initial position for avoiding the first light and a shielding position for shielding the first light. The application further comprises a triggering component in communication connection with the blocking component, and the liquid receiving disc is controlled to switch from the initial position to the shielding position based on the triggering component receiving a triggering signal of the liquid drop passing through a set number of times. The triggering component comprises a second light source emitter and a light intensity receptor for receiving a light signal of second light emitted by the second light source emitter, the second light source emitter and the light intensity receptor are arranged on two sides of the first light respectively, and the light emitting direction of the second light source emitter intersects with the light emitting direction of the first light source emitter. The blocking component further comprises a rotary control console, a driving device is arranged in the housing of the rotary control console, an output shaft of the driving device is connected with the liquid receiving disc through a suspension arm, and the output shaft is rotated to drive the liquid receiving disc to rotate between the initial position and the shielding position. ​ ​ ​ ​ 2. The device for observing a droplet according to claim 1, characterized by, ​ 3. The device for observing a droplet according to claim 1, wherein ​ ​ 4. The device for observing a droplet according to claim 3, characterized by ​ 5. The device for observing a droplet according to claim 4, characterized by ​ 6. The device for observing a droplet according to claim 3, wherein ​ 7. The device for observing a droplet according to claim 1, wherein The acquisition component includes a high-speed camera and a third light source emitter providing a background light source for the high-speed camera, the high-speed camera and the third light source emitter are respectively arranged on two sides of the object table, the bottom of the high-speed camera is connected with a three-axis displacement table, the three-axis displacement table is in communication connection with the light spot sensor, and the three-axis displacement table adjusts the position of the high-speed camera in horizontal transverse, horizontal longitudinal and vertical directions, so that the high-speed camera is aligned with the acquisition position.

8. The apparatus for observing a droplet according to any one of claims 1 to 7, characterized by, The bottom of the light spot sensor is rotationally connected with a plurality of adjusting columns, and the plurality of adjusting columns are used for adjusting the included angle between the light spot sensor and the surface of the object table.

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