Multi-station visual automatic constant volume device

Abstract

The utility model provides a multi-station visual automatic constant volume device which comprises a constant volume tube placing frame, a three-axis driving mechanism and a camera, the constant volume tube placing frame is provided with a plurality of stations used for placing constant volume tubes, the three-axis driving mechanism is arranged on the front side of the constant volume tube placing frame and connected with the camera, and the camera is connected with the three-axis driving mechanism. The three-axis driving mechanism drives the camera to move along the X axis, the Y axis and the Z axis so as to photograph the constant volume tubes at the multiple stations, and accurate identification of the liquid levels of the constant volume tubes is achieved. According to the utility model, the three-axis driving mechanism is matched with the camera to carry out cyclic photographing and reading, so that liquid level capacity monitoring can be simultaneously carried out on constant volume tubes at a plurality of stations, the liquid level can be accurately identified through visual constant volume judgment of the camera, and the detection efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to nitrogen blowing instrument technical field, especially relate to a multi -station visual automatic constant volume device. BACKGROUND

[0002] Nitrogen blowing concentration is a kind of sample pretreatment technology, mainly applied to the concentration preparation of large quantities of samples, such as drug screening, hormone analysis, liquid phase, gas phase and sample pretreatment preparation in mass spectrum analysis. It adopts nitrogen vortex rotation purging technology, and the sample is purged by heating, so that the sample to be treated is rapidly concentrated to the target volume, so that rapid separation and purification are realized. The constant volume judgment of concentration is one of the most core technologies of nitrogen blowing concentration. Most of the prior art adopts infrared sensor to judge constant volume, that is, infrared sensor is used to detect the volume of concentrated liquid, when the liquid surface drops to the sensor position after liquid concentration, the infrared light emitted by the infrared emitter is refracted by the liquid surface, and the amplitude of the infrared receiver is weakened, at this time, the sensor transmits a signal to the controller, and the controller controls to stop the concentration action, for example, the infrared constant volume device disclosed in patent CN219996284U. This infrared constant volume method has the following defects:

[0003] 1. If the sample tube wall above the liquid surface is sticky, the liquid is easily identified by the infrared sensor, causing misjudgment;

[0004] 2. When the target object is a transparent liquid, the absorption and scattering of infrared rays by the transparent liquid are weak, and the numerical difference of the infrared reading value is small, so that accurate identification cannot be achieved;

[0005] 3. External light source can easily interfere with the numerical reading of infrared constant volume;

[0006] 4. One infrared sensor can only detect and judge the constant volume of one sample tube, and cannot detect multiple workstations. If multiple sample tubes are to be detected, a constant volume device is required to detect multiple sample tubes in sequence, and the detection efficiency is low. Or use multiple constant volume devices to detect at the same time, the detection cost is higher. INVENTION CONTENTS

[0007] The utility model aims at providing a kind of multi -station visual automatic constant volume device, adopt three-axis drive mechanism cooperation camera to read the way of patrolling photographing, can carry out liquid level capacity monitoring to multiple workstations simultaneously, reach the accurate identification of liquid level by the visual constant volume judgment of camera, and detection efficiency is high.

[0008] In order to achieve the above object, the utility model provides a kind of multi-station visual automatic constant volume device, including constant volume tube rack, three-axis drive mechanism and camera, multiple workstations for placing constant volume tube are equipped on the constant volume tube rack, three-axis drive mechanism is arranged in the front side of constant volume tube rack and is connected with camera, three-axis drive mechanism drives camera to move along X axis, Y axis and Z axis to photograph the constant volume tube of multiple workstations, realize the accurate identification of constant volume tube liquid level.

[0009] Further, the rear side of the constant volume tube is provided with a backlight source, the backlight source projects backlight on the constant volume tube, and the camera photographs the constant volume tubes of multiple workstations on the front side of the constant volume tube rack.

[0010] Further, the multiple workstations on the constant volume tube rack are arranged side by side along the length direction of the constant volume tube rack, the length direction of the constant volume tube rack is parallel to the X axis direction of the three-axis drive mechanism, and the backlight source is transversely arranged along the length direction of the constant volume tube rack.

[0011] Further, the three-axis drive mechanism includes an X-axis movement module, a Y-axis movement module and a Z-axis movement module, the Z-axis movement module is arranged on the X-axis movement module, the Y-axis movement module is arranged on the Z-axis movement module, and the camera is arranged on the Y-axis movement module.

[0012] Further, the X-axis movement module includes a first motor, a synchronous belt, a synchronous wheel, a guide rail and a slider, the guide rail is arranged on the front side of the constant volume tube rack along the X-axis direction, the synchronous wheel has two, the two synchronous wheels are arranged at both ends of the guide rail, the synchronous belt is arranged on the two synchronous wheels, the first motor is connected with one of the synchronous wheels, the slider is slidably arranged on the guide rail and connected with the synchronous belt, and the Z-axis movement module is arranged on the slider.

[0013] Further, the Z-axis movement module includes a guide frame, a guide plate, a first screw rod and a second motor, the guide frame is arranged on the X-axis movement module, the guide plate is movably arranged on the guide frame, the first screw rod is vertically arranged in the middle of the guide plate and is threadedly connected with the guide plate, the second motor is arranged on the top of the guide frame and is connected with the top end of the first screw rod, and the Y-axis movement module is connected with the guide plate.

[0014] Further, the guide frame includes a top plate, a bottom plate and two guide rods, the bottom plate is arranged on the X-axis movement module, the two guide rods are fixed between the top plate and the bottom plate, the guide plate is movably arranged on the two guide rods, the first screw rod is located between the two guide rods, and the second motor is fixed on the top plate.

[0015] Further, the Y-axis moving module comprises a fixing frame, a connecting plate, a second screw rod, a third motor and a fixing plate, the connecting plate is arranged on the Z-axis moving module, the connecting plate is provided with sliding rails arranged along the Y-axis direction, the fixing frame is slidingly arranged on the sliding rails, and the camera is arranged on the fixing frame; the second screw rod is arranged along the Y-axis direction, the middle part of the second screw rod is in threaded connection with the fixing frame, one end of the second screw rod is connected with the third motor, and the third motor is fixed on the connecting plate.

[0016] Further, the camera is arranged on one side of the fixing frame in the Y-axis direction, the one side of the fixing frame in the Y-axis direction is the front side of the constant-volume tube placing frame; one side of the fixing frame in the X-axis direction is slidingly arranged on the sliding rails, and the other side of the fixing frame in the X-axis direction is provided with a wire fixing piece, the wire fixing piece is used for pressing the communication line of the camera.

[0017] Further, the camera and the three-axis driving mechanism are signal connected with a control system, the control system controls the movement of the three-axis driving mechanism, the camera sends the photographed image information to the control system, and the control system analyzes the image information to perform constant-volume monitoring.

[0018] After the above scheme is adopted, the beneficial effects of the present application are as follows:

[0019] 1. The camera is used for photographing the constant-volume tube, the liquid level in the constant-volume tube is photographed by the high-resolution camera, the subtle liquid level change can be captured, high-precision liquid level recognition is realized, and the problems of misjudgment and light source interference of the infrared constant-volume method do not occur.

[0020] 2. The three-axis driving mechanism is used for driving the camera to move along the X-axis, the Y-axis and the Z-axis, the camera moves along the X-axis direction to patrol and photograph the constant-volume tubes of multiple stations, liquid level detection is performed on multiple constant-volume tubes, the detection efficiency is improved, and the detection cost is reduced; secondly, the camera moves along the Z-axis direction to find the horizontal position of the liquid level of the constant-volume tube, the liquid level is accurately recognized, and the liquid volume in the constant-volume tube can be accurately measured; thirdly, the camera moves along the Y-axis direction to approach or move away from the constant-volume tube, the liquid level is conveniently and accurately focused, the visual resolution of the camera is improved, and the recognition accuracy of the liquid level is further improved.

[0021] 3. The backlight source is used for projecting the constant-volume tube, the projection light can directly irradiate on the constant-volume tube, the contrast between the liquid and the pipe wall is improved through the enhancement effect of the backlight source, the liquid in the constant-volume tube can be clearly displayed, the horizontal position of the liquid level is conveniently and accurately recognized by the camera, and the liquid volume in the constant-volume tube can be more accurately measured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole structure schematic view of the present application;

[0023] Figure 2 Structure schematic view of Y-axis moving module provided on Z-axis moving module of the utility model;

[0024] Figure 3 Structure schematic view of three-axis driving mechanism of the utility model;

[0025] Figure 4 Structure schematic view of X-axis moving module of the utility model.

[0026] Label explanation:

[0027] 1, constant volume tube rack;2, three-axis driving mechanism;21, X-axis moving module;211, first motor;212, synchronous belt;213, synchronous wheel;214, guide rail;215, sliding block;22, Z-axis moving module;221, guide frame;2211, top plate;2212, bottom plate;2213, guide rod;222, guide plate;223, first screw;224, second motor;23, Y-axis moving module;231, fixed frame;232, connecting plate;233, second screw;234, third motor;235, fixed plate;236, wire fixing part;237, sliding rail;3, camera;4, constant volume tube;5, backlight. Specific implementation

[0028] The utility model is explained in detail below in combination with the drawings and specific embodiments.

[0029] Focus on Figures 1-4 The utility model provides a kind of multi-station visual automatic constant volume device, including constant volume tube rack 1, three-axis driving mechanism 2 and camera 3, the constant volume tube rack 1 is equipped with multiple workstations for placing constant volume tube 4, the constant volume tube 4 is the sample tube with liquid, the three-axis driving mechanism 2 is set in the front side of constant volume tube rack 1 and is connected with camera 3, three-axis driving mechanism 2 drives camera 3 to move along X axis, Y axis and Z axis to photograph the constant volume tube 4 of multiple workstations, specifically can adopt high-resolution camera 3 to shoot the liquid level in constant volume tube 4, can capture subtle liquid level change, to realize high-precision liquid level identification, will not appear misjudgment and the problem of being interfered by light source like infrared constant volume.

[0030] Moreover, in the utility model, the X axis direction can be the left-right direction of the constant volume tube placing rack 1, the Y axis direction can be the front-rear direction of the constant volume tube placing rack 1, the Z axis direction can be the up-down direction of the constant volume tube placing rack 1, the camera 3 can move left and right along the X axis direction to patrol and take pictures of the constant volume tubes 4 of multiple stations, so that the liquid level of multiple constant volume tubes 4 can be detected at the same time, so that one camera 3 can detect the constant volume of multiple constant volume tubes 4, the detection efficiency is high and the cost is low; secondly, the camera 3 can move along the Z axis direction to find the liquid level horizontal position of the constant volume tube 4, so that the liquid level can be accurately identified, and the liquid volume in the constant volume tube 4 can be accurately measured; furthermore, the camera 3 can move along the Y axis direction to approach or move away from the constant volume tube, so that the liquid level can be accurately focused, the visual resolution of the camera 3 is improved, and the identification accuracy of the liquid level is further improved.

[0031] With reference to Figure 1 , the rear side of the constant volume tube 4 is provided with a backlight source 5, the backlight source 5 can backlight project the constant volume tube 4, the projection light of the backlight projection can directly irradiate on the constant volume tube 4, through the enhancement effect of the backlight source 5, the contrast between the liquid and the tube wall is improved, the liquid in the constant volume tube 4 can be clearly displayed, the horizontal position of the liquid level can be distinguished and found by the camera 3, and the liquid volume in the constant volume tube 4 can be more accurately measured. The camera 3 and the three-axis driving mechanism 2 need to be arranged at the front side of the constant volume tube placing rack, the backlight source 5 projects at the rear side of the constant volume tube 4, and the camera 3 takes pictures at the front side of the constant volume tube 4.

[0032] Specifically, the multiple stations on the constant volume tube placing rack 1 are specifically arranged side by side along the length direction of the constant volume tube placing rack 1, the backlight source 5 is a long lamp tube structure, which is arranged transversely along the length direction of the constant volume tube placing rack 1, and can backlight project all the constant volume tubes 4. The length direction of the constant volume tube placing rack 1 is parallel to the X axis direction of the three-axis driving mechanism 2, the three-axis driving mechanism 2 can drive the camera 3 to move left and right, so that the multiple constant volume tubes 4 can be taken pictures in turn.

[0033] With reference to Figures 1-3 , the three-axis driving mechanism 2 includes an X axis moving module 21, a Y axis moving module 23 and a Z axis moving module 22, the Z axis moving module 22 is arranged on the X axis moving module 21, the Y axis moving module 23 is arranged on the Z axis moving module 22, and the camera 3 is arranged on the Y axis moving module 23, so that the camera 3 can be driven to move along the X axis, the Y axis and the Z axis directions through the X axis moving module 21, the Y axis moving module 23 and the Z axis moving module 22. It should be noted that the arrangement position and the connection relationship among the X axis moving module 21, the Y axis moving module 23 and the Z axis moving module 22 are not limited, and the camera 3 can be driven to move along the three-axis directions.

[0034] Specifically, with reference to Figure 1 and Figure 4The X-axis moving module 21 comprises a first motor 211, a synchronous belt 212, two synchronous wheels 213, a guide rail 214 and a sliding block 215. The guide rail 214 is arranged on the front side of the constant-volume tube placing rack 1 along the X-axis direction. The two synchronous wheels 213 are arranged at the two ends of the guide rail 214 respectively. The synchronous belt 212 is arranged on the two synchronous wheels 213. The first motor 211 is connected with one of the synchronous wheels 213. The sliding block 215 is arranged on the guide rail 214 and connected with the synchronous belt 212. The Z-axis moving module 22 is arranged on the sliding block 215. The first motor 211 drives the synchronous wheel 213 to rotate, and the synchronous belt 212 drives the sliding block 215 to move left and right. The sliding block 215 drives the Z-axis moving module 22 to move left and right. The Z-axis moving module 22 drives the Y-axis moving module 23 and the camera 3 to move left and right.

[0035] With reference to the drawings Figures 2-3 The Z-axis moving module 22 comprises a guide frame 221, a guide plate 222, a first screw rod 223 and a second motor 224. The guide frame 221 is arranged on the X-axis moving module 21, and specifically arranged on the sliding block 215, and driven by the sliding block 215 to move left and right. The guide plate 222 is arranged on the guide frame 221 to move up and down. The first screw rod 223 is vertically arranged in the middle of the guide plate 222 and threadedly connected with the guide plate 222. The second motor 224 is arranged on the top of the guide frame 221 and connected with the top end of the first screw rod 223. The Y-axis moving module 23 is connected with the guide plate 222. The second motor 224 drives the first screw rod 223 to rotate, and the first screw rod 223 drives the guide plate 222 to move up and down, thereby driving the Y-axis moving module 23 and the camera 3 to move up and down.

[0036] Further, the guide frame 221 comprises a top plate 2211, a bottom plate 2212 and two guide rods 2213. The bottom plate 2212 is arranged on the guide rail 214 of the X-axis moving module 21. The two guide rods 2213 are fixed between the top plate 2211 and the bottom plate 2212. The guide plate 222 is movably arranged on the two guide rods 2213. The guide rods 2213 have a supporting and guiding effect, so that the guide plate 222 can stably move up and down. The first screw rod 223 is located between the two guide rods 2213. The second motor 224 is fixed on the top plate 2211. The rotor of the second motor 224 can pass through the top plate 2211 and be connected with the first screw rod 223.

[0037] With reference to the drawings Figure 2The Y-axis moving module 23 comprises a fixing frame 231, a connecting plate 232, a second screw rod 233, a third motor 234 and a fixing plate 235, the connecting plate 232 is arranged on the Z-axis moving module 22 and is fixed on the side of the guide plate 222, and is driven by the guide plate 222 to move up and down; the connecting plate 232 is provided with a sliding rail 237 arranged along the Y-axis direction, the fixing frame 231 is slidingly arranged on the sliding rail 237 and can move forward and backward on the sliding rail 237, and the camera 3 is arranged on the fixing frame 231; the second screw rod 233 is arranged along the Y-axis direction, the middle part of the second screw rod 233 is threadedly connected with the fixing frame 231, one end of the second screw rod 233 is connected with the third motor 234, the third motor 234 is fixed on the connecting plate 232, the third motor 234 can drive the second screw rod 233 to rotate, the second screw rod 233 can drive the fixing frame 231 to move the camera 3 along the sliding block 215 forward and backward, so that the camera 3 approaches or moves away from the constant-volume tube 4.

[0038] Further, the camera 3 is arranged on one side of the fixing frame 231 in the Y-axis direction, the one side of the fixing frame in the Y-axis direction is the front side of the constant-volume tube placing frame 1, that is, the camera 3 is arranged on the rear side of the fixing frame 231; the one side of the fixing frame in the X-axis direction is slidingly arranged on the sliding rail 237, and the other side of the fixing frame in the X-axis direction is provided with a wire fixing part 236, specifically, the right side of the fixing frame 231 is slidingly matched with the sliding rail 237, and the left side of the fixing frame 231 is provided with the wire fixing part 236, the wire fixing part 236 can press the communication line of the camera 3 to prevent the communication line from being in poor contact when the camera 3 moves. In addition, the front and rear sides of the connecting plate 232 are provided with the fixing plates 235, the third motor 234 is arranged on the fixing plate 235 on one side, and the second screw rod 233 is rotationally arranged on the fixing plate 235 on the other side, and the two fixing plates 235 arranged on the connecting plate 232 facilitate the installation of the third motor 234 and the second screw rod 233.

[0039] In addition, the camera 3 and the three-axis driving mechanism 2 are both signal-connected with a control system (not shown in the figure), the movement of the three-axis driving mechanism 2 is controlled by the control system, and the control system specifically controls the start and stop of the first motor 211, the second motor 224 and the third motor 234; the camera 3 can be specifically signal-connected with the control system through the communication line, the camera 3 sends the image information shot by the camera 3 to the control system, the control system can calculate the volume of the solution and judge whether the liquid level reaches the preset threshold value according to the image information, so as to judge whether the liquid level is in a normal state and realize the constant-volume monitoring of the constant-volume tube 4.

[0040] The above only describes the preferred embodiments of the present application, and does not limit the design of the present application, and any equivalent changes made according to the key design of the present application also fall within the protection scope of the present application.

Claims

1. A multi-station visual auto-constant-volume device, characterized in that: The application relates to a device for recognizing the liquid level of a constant-volume tube, which comprises a constant-volume tube placing rack, a three-axis driving mechanism and a camera.

2. The multi-station visual auto-constant-volume device of claim 1, wherein: The rear side of the constant-volume tube is provided with a backlight source which projects light on the constant-volume tube, and the camera takes pictures of the constant-volume tubes on the multiple workstations on the front side of the constant-volume tube placing rack.

3. A multi-station visual auto-constant-volume device according to claim 2, characterized in that: The multiple workstations on the constant-volume tube placing rack are arranged side by side along the length direction of the constant-volume tube placing rack, the length direction of the constant-volume tube placing rack is parallel to the X-axis direction of the three-axis driving mechanism, and the backlight source is arranged transversely along the length direction of the constant-volume tube placing rack.

4. A multi-station visual automatic voluming apparatus according to any one of claims 1-3, characterized in that: The three-axis driving mechanism comprises an X-axis moving module, a Y-axis moving module and a Z-axis moving module, the Z-axis moving module is arranged on the X-axis moving module, the Y-axis moving module is arranged on the Z-axis moving module, and the camera is arranged on the Y-axis moving module.

5. A multi-station visual auto-constant-volume device according to claim 4, characterized in that: The X-axis moving module comprises a first motor, a synchronous belt, two synchronous wheels, a guide rail and a sliding block, the guide rail is arranged on the front side of the constant-volume tube placing rack along the X-axis direction, the two synchronous wheels are arranged at the two ends of the guide rail respectively, the synchronous belt is arranged on the two synchronous wheels in a matched mode, the first motor is connected with one of the synchronous wheels, the sliding block is arranged on the guide rail in a sliding mode and is connected with the synchronous belt, and the Z-axis moving module is arranged on the sliding block.

6. A multi-station visual auto-constant-volume device according to claim 4, characterized in that: The Z-axis moving module comprises a guide frame, a guide plate, a first screw rod and a second motor, the guide frame is arranged on the X-axis moving module, the guide plate is arranged on the guide frame in a moving mode, the first screw rod is vertically arranged in the middle part of the guide plate and is threadedly connected with the guide plate, the second motor is arranged on the top of the guide frame and is connected with the top end of the first screw rod, and the Y-axis moving module is connected with the guide plate.

7. A multi-station visual auto-constant-volume device according to claim 6, characterized in that: The guide frame comprises a top plate, a bottom plate and two guide rods, the bottom plate is arranged on the X-axis moving module, the two guide rods are fixed between the top plate and the bottom plate, the guide plate is movably arranged on the two guide rods, the first screw rod is located between the two guide rods, and the second motor is fixed on the top plate.

8. The multi-station visual auto-constant-volume device of claim 4, wherein: The Y-axis moving module comprises a fixing frame, a connecting plate, a second screw rod, a third motor and a fixing plate, the connecting plate is arranged on the Z-axis moving module, the connecting plate is provided with a sliding rail arranged along the Y-axis direction, the fixing frame is arranged on the sliding rail in a sliding mode, and the camera is arranged on the fixing frame; the second screw rod is arranged along the Y-axis direction, the middle part of the second screw rod is threadedly connected with the fixing frame, one end of the second screw rod is connected with the third motor, and the third motor is fixed on the connecting plate.

9. A multi-station visual auto-constant-volume device according to claim 8, characterized in that: The camera is arranged on one side of the fixing frame along the Y-axis direction, the one side of the fixing frame along the Y-axis direction is the front side of the constant-volume tube placing rack, one side of the fixing frame along the X-axis direction is arranged on the sliding rail in a sliding mode, the other side of the fixing frame along the X-axis direction is provided with a wire fixing part, and the wire fixing part is used for pressing the communication wire of the camera.

10. The multi-station visual auto-filling apparatus of claim 1, wherein: The camera and the three-axis driving mechanism are both signal connected with a control system, the control system controls the three-axis driving mechanism to move, the camera sends the photographed image information to the control system, and the control system analyzes the image information to carry out constant volume monitoring.

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