1. A gauge calibration detection device, comprising: the displacement control system and the machine vision measurement system are connected with an upper computer, the displacement control system is located on one side of the container, and the machine vision measurement system is located on the other side of the container.

2. The apparatus according to claim 1, wherein a side wall of the container near the machine vision measuring system is connected to a communicating pipe, and another side wall of the container is provided with a connecting assembly on which a liquid level meter to be calibrated and detected is disposed.

3. The liquid level meter calibration detection device according to claim 2, wherein the connection assembly comprises a first valve and a connection joint connected with the first valve, a plurality of groups of strip-shaped grooves are formed in the connection joint, a through hole communicated with the container is formed in the middle of the connection joint, the arc radius of one end, close to the through hole, of each strip-shaped groove is small, and the arc radius of one end, far away from the through hole, of each strip-shaped groove is gradually increased.

4. The device for calibrating and detecting the liquid level meter according to claim 1, wherein a placing rack is arranged at the top of the container, a mounting plane of the placing rack is perpendicular to the inner diameter of the container, and a limiting part used for supporting and limiting the liquid level meter to be calibrated and detected is arranged in the container.

5. The apparatus of claim 1, wherein the displacement control system comprises a first actuator and a moving seal, the moving seal being in sealed sliding connection with the container, the moving seal being connected to the first actuator.

6. The apparatus of claim 1, wherein the machine vision measuring system comprises a lifting device and a vision measuring assembly in driving connection with the lifting device.

7. The liquid level gauge calibration detection device of claim 6, wherein the lifting device comprises a support frame, a second lead screw and a second driving device arranged on the support frame, the second lead screw is arranged in the support frame, and a transmission output end of the second driving device is connected with one end of the second lead screw.

8. The apparatus of claim 7, wherein the lifting device further comprises a manual adjustment mechanism for rotating the second lead screw, the manual adjustment mechanism comprises a wheel, a connecting member, a first gear and a second gear disposed at the other end of the second lead screw, the connecting member is slidably connected to the supporting frame, one end of the connecting member is connected to the first gear, the other end of the connecting member is connected to the wheel, and the first gear is engaged with the second gear.

9. The liquid level meter calibration detection device according to claim 7, wherein the vision measurement assembly comprises a host, a display, a lens and an optical camera, the display is embedded in one side of the host, the optical camera is arranged in the other side of the host, the lens is arranged on the optical camera, and the host is provided with a threaded through hole matched with the second lead screw.

10. The apparatus of claim 1, wherein a temperature sensor is disposed in the container for detecting the temperature of the liquid, and the temperature sensor is in communication with the displacement control system and the machine vision measuring system.

Background

The liquid level meter is used for indicating and controlling the liquid level in an industrial process measurement and control system, and the liquid level meter is required to be calibrated and detected due to the fact that the types of the liquid level meter are different and the working principle is different, and the accuracy and the reliability of liquid level measurement are guaranteed.

When the liquid level meter is calibrated and detected, the numerical values of different water level lines need to be detected, the water level lines rise and are filled with water through the water pump, the water filling amount and the water filling speed are controlled by the speed adjusting valve, the water level lines fall and are drained through the water pump, the water outlet amount and the water draining speed are controlled by the speed adjusting valve, the water level line control of the water filling amount and the water draining amount is unstable, the water pump has inertia buffer during water filling and draining, the water level in a glass tube of the reading value is greatly shaken, the reading can be carried out only after the water level is stable, particularly, when the return error of the liquid level meter is calibrated and detected, the falling water level line is more difficult to control, when the zero position of the liquid level meter is calibrated and detected, the inaccurate zero position value is found in the prior art, and when the data of a standard device and a detected object are read, the reading repeatability is poor by manual reading.

Disclosure of Invention

The invention aims to provide a liquid level meter calibration detection device which can solve habitual buffering generated when a water pump injects water and discharges water, ensure that a water level line is relatively stable and does not shake, accurately control the water level line to ascend and descend, solve reading values of a forward stroke indication error, a reverse stroke indication error and a zero position error and improve calibration detection precision.

The embodiment of the invention is realized by the following steps:

the embodiment of the application provides a level gauge calibration detection device, and it includes container, displacement control system and machine vision measurement system, and above-mentioned displacement control system and above-mentioned machine vision measurement system all are connected with the host computer, and above-mentioned displacement control system is located one side of above-mentioned container, and the opposite side of above-mentioned container is located to above-mentioned machine vision measurement system.

In some embodiments of the present invention, a side wall of the container near the machine vision measuring system is communicated with a communicating pipe, and another side wall of the container is provided with a connecting assembly, and the connecting assembly is provided with a liquid level meter to be calibrated and detected.

In some embodiments of the present invention, the connecting assembly includes a first valve and a connecting joint connected to the first valve, the connecting joint is provided with a plurality of groups of strip-shaped grooves, a through hole communicated with the container is formed in the middle of the connecting joint, the arc radius of one end of each strip-shaped groove close to the through hole is small, and the arc radius of one end of each strip-shaped groove far away from the through hole is gradually increased.

In some embodiments of the present invention, a placing rack is disposed on a top of the container, a mounting plane of the placing rack is perpendicular to an inner diameter of the container, and a position-limiting member is disposed in the container for supporting and limiting a level gauge to be calibrated and detected.

In some embodiments of the invention, the displacement control system includes a first drive device and a moving seal in sealed sliding communication with the container, the moving seal being coupled to the first drive device.

In some embodiments of the present invention, the machine vision measuring system includes a lifting device and a vision measuring assembly, and the vision measuring assembly is in transmission connection with the lifting device.

In some embodiments of the present invention, the lifting device includes a support frame, a second lead screw, and a second driving device disposed on the support frame, the second lead screw is disposed in the support frame, and a transmission output end of the second driving device is connected to one end of the second lead screw.

In some embodiments of the present invention, the lifting device further includes a manual adjustment mechanism for rotating the second lead screw, the manual adjustment mechanism includes a rotating wheel, a connecting member, a first gear and a second gear disposed at the other end of the second lead screw, the connecting member is slidably connected to the supporting frame, one end of the connecting member is connected to the first gear, the other end of the connecting member is connected to the rotating wheel, and the first gear is engaged with the second gear.

In some embodiments of the present invention, the vision measuring assembly includes a host, a display, a lens and an optical camera, the display is embedded in one side of the host, the optical camera is disposed on the other side of the host, the lens is disposed on the optical camera, and the host is provided with a threaded through hole matched with the second lead screw.

In some embodiments of the present invention, a temperature sensor for detecting a temperature of the liquid is further disposed in the container, and the temperature sensor is in communication connection with the displacement control system and the machine vision measuring system, respectively.

Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:

the embodiment of the application is provided with the displacement control system and the machine vision measuring system which are respectively arranged at two sides of the container, and the displacement control system and the machine vision measuring system are both connected with the upper computer, the upper computer can control the work of the displacement control system and the machine vision measuring system, the displacement control system can accurately adjust the water level value in the container, relieve habitual buffering generated in the adjusting process of water, ensure that the water level line is relatively stable and does not shake, improve the measuring precision, simultaneously can solve the reading values of positive and negative stroke indicating errors, return stroke errors and zero position errors, can accurately measure the liquid level value by the machine vision measuring system, has high resolution ratio, can solve artificial reading errors, has accurate detection data, quick detection, convenient operation and simple maintenance, the use effect is good, and wherein displacement control system and machine vision measurement system can also independently measure the water level value, can not influence work each other, improves the precision that the level gauge calibration detected greatly, improves the result of use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a calibration and detection apparatus for a liquid level meter according to an embodiment of the present invention;

FIG. 2 is a front view of a lifting device in a liquid level meter calibration detection apparatus according to an embodiment of the present invention;

FIG. 3 is a front view of a visual measurement assembly of the apparatus for calibrating and detecting a liquid level gauge according to an embodiment of the present invention;

FIG. 4 is a front view of a connection fitting of the apparatus for calibrating and detecting a level gauge according to the embodiment of the present invention;

FIG. 5 is a front view of a mesh plate in a liquid level meter calibration detection apparatus according to an embodiment of the present invention.

Icon: the device comprises a container 1, a communicating pipe 2, a liquid level meter 3, a connecting joint 4, a piston 5, a first lead screw 6, a sleeve 7, a first driving device 8, a second driving device 9, a second lead screw 10, a host 11, a display 12, a rotating wheel 13, a first gear 14, a second gear 15, a connecting piece 16, a support frame 17, a limiting groove 18, a threaded through hole 19, an optical camera 20, a lens 21, a temperature sensor 22, a placing frame 23, a grid pore plate 24, a first valve 25 and a second valve 26.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

Referring to fig. 1, an embodiment of the present application provides a liquid level gauge calibration and detection apparatus, which includes a container 1, a displacement control system and a machine vision measurement system, where the displacement control system and the machine vision measurement system are both connected to an upper computer, the displacement control system is located on one side of the container 1, and the machine vision measurement system is located on the other side of the container 1.

In this embodiment, the container 1 can be used for containing liquid, so as to facilitate detection of the liquid level meter 3, the displacement control system and the machine vision measurement system are respectively arranged at two sides of the container 1, and the displacement control system and the machine vision measurement system are both connected with an upper computer, so that the upper computer can control the operation of the displacement control system and the machine vision measurement system, the water level value in the container 1 can be accurately adjusted through the displacement control system, habitual buffering generated in the adjustment process of water is relieved, the water level line is relatively stable and does not shake, the measurement accuracy is improved, the reading values of positive and negative stroke indication errors, return stroke errors and zero position errors can be solved, the liquid level value can be accurately measured through the machine vision measurement system, the resolution ratio is high, artificial reading errors can be solved, the detection data is accurate, the detection is rapid, and the operation is convenient, the maintenance is simple, excellent in use effect, and wherein displacement control system and machine vision measurement system can also independently measure the water level value, can not influence work each other, improves the precision that 3 calibration of level gauge detected greatly, improves the result of use.

In some embodiments of the present invention, the second valve 26 is disposed on the bottom side of the container 1, on one hand, the second valve 26 can be used to discharge the liquid in the container 1, so as to adjust the remaining amount of the liquid in the container 1 or replace the liquid, and on the other hand, the second valve 26 can be used to connect an external water pipe, through which water is filled into the container 1, so as to adjust the liquid level in the container 1.

Example 2

Referring to fig. 1 and fig. 4, the present embodiment provides a liquid level meter calibration and detection apparatus based on embodiment 1, which is different from embodiment 1 in that: above-mentioned container 1 is close to a lateral wall intercommunication of above-mentioned machine vision measurement system has communicating pipe 2, and another lateral wall of above-mentioned container 1 is equipped with coupling assembling, and above-mentioned coupling assembling is last to be equipped with the level gauge 3 of waiting to calibrate the detection.

In this embodiment, 1 lateral wall intercommunication of container has communicating pipe 2, utilize the principle of linker, can make the liquid level in communicating pipe 2 the same with the liquid level in the container 1, alright make machine vision measurement system measure the liquid level of communicating pipe 2 like this, then compare with the numerical value that the level gauge 3 that treats the calibration detection measured, judge the level gauge 3 measurement accuracy who takes the calibration detection, another lateral wall of container 1 is equipped with coupling assembling, can connect the level gauge 3 that the belt calibration detected through coupling assembling, make the level gauge 3 that takes the calibration detection can measure the liquid level numerical value in the container 1, then compare with the numerical value that the machine intuition measurement system measured, and then can judge the measurement accuracy of level gauge 3.

Example 3

Referring to fig. 4, the present embodiment provides a liquid level meter calibration and detection apparatus based on embodiment 2, which is different from embodiment 2 in that: above-mentioned coupling assembling includes first valve 25 and the attach fitting 4 of being connected with above-mentioned first valve 25, is equipped with a plurality of groups bar groove on above-mentioned attach fitting 4, and above-mentioned attach fitting 4 middle part is equipped with the through-hole with above-mentioned container 1 intercommunication, and the circular arc radius that above-mentioned bar groove is close to above-mentioned through-hole one end is little, and the circular arc radius that above-mentioned through-hole one end was kept away from in above-mentioned bar groove increases gradually.

In this embodiment, the connection assembly includes a first valve 25 and a connector 4, wherein the connector 4 is connected to the first valve 25, the first valve 25 can be used to control the opening and closing of a channel between the container 1 and the connector 4, and the connector 4 is connected to a liquid level meter 3 with calibration detection, so that during measurement, the liquid in the container 1 can flow to the liquid level meter 3 with calibration detection, so as to facilitate the liquid level meter 3 to measure the liquid level, the connector 4 is provided with a plurality of groups of strip-shaped grooves, the liquid level meter 3 can be mounted on the connector 4 through the strip-shaped grooves, the mounting is simple and convenient, in addition, the arc radius of the strip-shaped groove near one end of the through hole is small, the arc radius of the strip-shaped groove far away from one end of the through hole is gradually increased, so as to meet the flange interface connection requirements of different specifications, the function effect is good, and the liquid level meters 3 with different specifications can be calibrated and detected, convenient installation and good use effect.

Example 4

Referring to fig. 1 and 5, the present embodiment provides a liquid level meter calibration and detection apparatus based on any one of the above embodiments, which is different from any one of the above embodiments in that: the top of the container 1 is provided with a placing frame 23, the mounting plane of the placing frame 23 is perpendicular to the inner diameter of the container 1, and a limiting part used for supporting and limiting the liquid level meter 3 to be calibrated and detected is arranged in the container 1.

In this embodiment, container 1's top is equipped with rack 23, can be used for placing the level gauge 3 of treating the calibration detection, and rack 23's mounting plane is perpendicular with container 1's internal diameter, can guarantee the steady that level gauge 3 placed, improve and detect the precision, be equipped with the locating part in container 1 in addition, can be used for treating the level gauge 3 of calibration detection to carry out spacing support, make level gauge 3 place perpendicularly, reduce measuring error, improve the detection precision of the level gauge 3 of taking the calibration detection.

In some embodiments of this embodiment, the limiting member is a mesh plate 24, and the height of the mesh plate 24 is the same as the bottom height of the communicating pipe 2, so as to better limit and support the liquid level meter 3, and the using effect is good.

Example 5

Referring to fig. 1, the present embodiment provides a liquid level meter calibration detection apparatus based on any one of the above embodiments, and the difference between the liquid level meter calibration detection apparatus and any one of the above embodiments is: the displacement control system comprises a first drive means 8 and a movable sealing member, the movable sealing member being sealingly and slidably connected to the container 1, the movable sealing member being connected to the first drive means 8.

In this embodiment, first drive arrangement 8 can provide power for removing the sealing member, removes about removing through the drive of first drive arrangement 8 removal sealing member, removes through removing the sealing member, and the waterline in the adjustment container 1 is convenient for detect level gauge 3, and removes through the drive of first drive arrangement 8 removal sealing member, can effectively solve the cushioning effect of waterline, guarantees that the waterline is steady relatively and does not appear rocking.

When the water level control device is used, the first driving device 8 is connected with an upper computer, the upper computer sends signals to the first driving device 8, the first driving device 8 drives the movable sealing piece to move, when the first driving device 8 drives the movable sealing piece to move leftwards, the water level line in the container 1 correspondingly descends, and when the first driving device 8 drives the movable sealing piece to move rightwards, the water level line in the container 1 correspondingly ascends.

In some embodiments of the present embodiment, the first driving device 8 may be a servo motor, a sleeve 7 is disposed at a transmission output end of the servo motor, a first lead screw 6 is connected to the sleeve 7 through a thread, the movable sealing member may be a piston 5, and the first lead screw 6 is movably connected to the piston 5.

In this embodiment, above-mentioned servo motor can receive the instruction that the host computer sent, drive servo motor work, it rotates to drive sleeve 7 through servo motor, first lead screw 6 and sleeve 7 threaded connection, when sleeve 7 rotates, can drive first lead screw 6 withdrawal or stretch out, thereby drive piston 5 and remove, the water level line in the adjustment container 1, the digital display through the host computer demonstrates the water level line value, the reading of being convenient for, through adopting host computer control servo motor work, can make displacement control system's a left side, the accurate 0.001mm that reaches of right displacement volume, it is high to detect the precision.

Example 6

Referring to fig. 1 to fig. 3, the present embodiment provides a liquid level meter calibration detecting device based on any one of the above embodiments, which is different from any one of the above embodiments in that: the machine vision measuring system comprises a lifting device and a vision measuring assembly, and the vision measuring assembly is in transmission connection with the lifting device.

In this embodiment, vision measuring component and elevating gear transmission are connected, can drive vision measuring component through elevating gear and reciprocate, make vision measuring component can be according to the position of liquid level altitude mixture control self in the container 1, be convenient for measure the liquid level in the container 1.

Example 7

Referring to fig. 1 to fig. 3, the present embodiment provides a liquid level meter calibration detecting device based on embodiment 6, which is different from embodiment 6 in that: the lifting device comprises a support frame 17, a second lead screw 10 and a second driving device 9 arranged on the support frame 17, the second lead screw 10 is arranged in the support frame 17, and the transmission output end of the second driving device 9 is connected with one end of the second lead screw 10.

In this embodiment, the supporting frame 17 provides stable support for the second screw rod 10 and the second driving device 9, the second driving device 9 can provide power for the second screw rod 10, and the second driving device 9 works to drive the second screw rod 10 to rotate, so as to achieve lifting adjustment.

Example 8

Referring to fig. 1-2, the present embodiment provides a liquid level meter calibration detecting device based on embodiment 7, which is different from embodiment 7 in that: the lifting device further comprises a manual adjusting mechanism for rotating the second lead screw 10, the manual adjusting mechanism comprises a rotating wheel 13, a connecting piece 16, a first gear 14 and a second gear 15 arranged at the other end of the second lead screw 10, the connecting piece 16 is connected with the supporting frame 17 in a sliding manner, one end of the connecting piece 16 is connected with the first gear 14, the other end of the connecting piece 16 is connected with the rotating wheel 13, and the first gear 14 is meshed with the second gear 15.

In this embodiment, the manual adjustment mechanism is connected to the second lead screw 10, the manual adjustment mechanism can rotate the second lead screw 10 in a manual manner to achieve lifting adjustment, wherein the connecting member 16 is slidably connected to the supporting frame 17, so that the connecting member 16 can move up and down along the supporting frame 17, one end of the connecting member 16 is connected to the first gear 14, the other end of the connecting member 16 is connected to the rotating wheel 13, the connecting member 16 is used for connecting the rotating wheel 13 and the first gear 14 to rotate synchronously, and the first gear 14 is meshed with the second gear 15, so that the first gear 14 can be rotated to drive the second gear 15 to rotate, thereby achieving the effect of manually adjusting lifting.

When the manual adjusting device is used, when the second driving device 9 drives the second lead screw 10 to rotate, the rotating wheel 13, the connecting piece 16 and the first gear 14 can move downwards under the action of self gravity, so that the first gear 14 is separated from the second gear 15, the work of the second driving device 9 cannot be influenced, when manual adjustment is needed, the rotating wheel 13 is upwards supported, the rotating wheel 13, the connecting piece 16 and the first gear 14 integrally move upwards along the supporting frame 17, the first gear 14 is meshed with the second gear 15, the rotating wheel 13 can be rotated, then the connecting piece 16 drives the first gear 14 to rotate, the first gear 14 rotates to drive the second gear 15 to rotate, and the second lead screw 10 is driven to rotate, so that the manual adjusting function is realized.

Example 9

Referring to fig. 1-2, the present embodiment provides a liquid level meter calibration detection apparatus based on any one of the above embodiments, which is different from any one of the above embodiments in that: the vision measuring assembly comprises a host 11, a display 12, a lens 21 and an optical camera 20, wherein the display 12 is embedded in one side of the host 11, the optical camera 20 is arranged on the other side of the host 11, the lens 21 is arranged on the optical camera 20, and the host 11 is provided with a threaded through hole 19 matched with the second lead screw 10.

In this embodiment, the host 11 is provided with a threaded through hole 19 matched with the second lead screw 10, so that the host 11 can be driven to move up and down by rotating the second lead screw 10, the position of the host 11 can be adjusted, the value of the water level in the container 1 can be measured conveniently, the display 12 is arranged on one side of the host 11, the optical camera 20 is arranged on the other side of the host 11, on one hand, the host 11 can provide stable support for the display 12 and the optical camera 20, on the other hand, a processor arranged in the host 11 can process the affected picture, then the value is displayed by the display 12, the reading of personnel is facilitated, the error of artificial reading is reduced, the lens 21 is arranged on one side of the optical camera 20, the imaging quality of the optical camera 20 can be improved by the lens 21, and the value of the water level in the container 1 can be detected better.

In the embodiment of this embodiment, optical camera 20 can select for use CCD industry camera, can provide better image quality to in the improvement detect the precision, and CCD stable performance is reliable easily to install, and continuous operation time is long, can make machine vision measurement system's resolution ratio reach 0.001mm through adopting the CCD camera, detects the precision height, excellent in use effect.

Example 10

Referring to fig. 1-2, the present embodiment provides a liquid level meter calibration detection apparatus based on any one of the above embodiments, which is different from any one of the above embodiments in that: the container 1 is also provided with a temperature sensor 22 for detecting the temperature of the liquid, and the temperature sensor 22 is respectively connected with the displacement control system and the machine vision measuring system in a communication way.

In this embodiment, still be equipped with the temperature sensor 22 that detects liquid temperature in the container 1, can measure out the internal temperature of liquid through temperature sensor 22, temperature sensor 22 in addition with displacement control system and machine vision measurement system communication connection respectively, can be with the temperature value input displacement control system and machine vision measurement system that temperature sensor 22 measured in to reduce the influence of liquid temperature to the measured data, make the testing result can be more accurate.

In summary, embodiments of the present invention provide a calibration and detection device for a liquid level meter, in which a displacement control system and a machine vision measurement system are provided, wherein the displacement control system and the machine vision measurement system are respectively disposed on two sides of a container 1, and both the displacement control system and the machine vision measurement system are connected to an upper computer, and the upper computer can control the operation of the displacement control system and the machine vision measurement system, so that the water level value in the container 1 can be precisely adjusted by the displacement control system, habitual buffering generated during adjustment of water is relieved, the water level line is relatively stable and free from shaking, the measurement precision is improved, meanwhile, the error reading value of forward and reverse strokes and the reading value of zero position of a liquid level meter 3 can be solved, the liquid level value can be precisely measured by the machine vision measurement system, the resolution ratio is high, the artificial reading error can be solved, and the detection data is accurate, the detection is quick, the operation is convenient, the maintenance is simple, the use effect is good, the water level value can be independently measured by the displacement control system and the machine vision measuring system, the work among each other cannot be influenced, the precision of the 3-degree calibration and detection of the liquid level meter is greatly improved, and the use effect is improved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.