CN113551645A

CN113551645A - Static leveling device and measuring system thereof

Info

Publication number: CN113551645A
Application number: CN202110788241.7A
Authority: CN
Inventors: 汤建军; 周安萌; 朱瑞; 李朝阳
Original assignee: Anhui Specreation Instrument Science & Technology Co ltd
Current assignee: Anhui Specreation Instrument Science & Technology Co ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-10-26

Abstract

The invention provides a static leveling device and a measuring system thereof, at least comprising: a base; the lower pot body comprises an air pipe, a water pipe and a water level datum line, the lower pot body is connected with the base, the air pipe is connected to the lower pot body, the water pipe is arranged on one side of the air pipe, and the water level datum line is arranged on the inner wall of the lower pot body and is positioned between the air pipe and the water pipe; the upper pot body comprises a cover plate, the upper pot body is arranged on the lower pot body and connected with the lower pot body to form an accommodating space, and the cover plate is connected with the upper pot body through a screw; and the target ball seat is arranged on the upper pot body and is connected with the cover plate. By the static leveling device and the system thereof, the detection precision of settlement detection can be improved.

Description

Static leveling device and measuring system thereof

Technical Field

The invention belongs to the technical field of measurement and control of instruments and meters, and particularly relates to a static leveling device and a measurement system thereof.

Background

In the process of operating the large scientific test device, particularly the large hadron collider or the related equipment of the high-energy ion accelerator, the large scientific test device can cause elevation change in the vertical direction due to the action of gravity along with the passage of time. Meanwhile, the tester cannot arrive at the site in the running process, and the real-time control of the test device cannot be realized. Therefore, how to monitor the sedimentation state of each key part on the scientific experimental device of the university in real time and realize high-precision sedimentation detection is a problem to be solved urgently at present.

Disclosure of Invention

The invention aims to provide a static leveling device and a measuring system thereof, which meet the requirement of high-precision settlement detection in the vertical direction.

In order to solve the above technical problem, the present invention provides a hydrostatic leveling device, including:

a base;

the lower pot body comprises an air pipe, a water pipe and a water level datum line, the lower pot body is connected with the base, the air pipe is connected to the lower pot body, the water pipe is arranged on one side of the air pipe, and the water level datum line is arranged on the inner wall of the lower pot body and is positioned between the air pipe and the water pipe;

the upper pot body comprises a cover plate, the upper pot body is arranged on the lower pot body and connected with the lower pot body to form an accommodating space, and the cover plate is connected with the upper pot body through a screw;

and the target ball seat is arranged on the upper pot body and is connected with the cover plate.

In summary, in the embodiments of the present invention, the sensor unit and the control device are built in, so that the fully-immersed capacitive static leveling device can be implemented, the displacement variation of the capacitive detection unit gap is increased, and the displacement variation resolution is improved. Moreover, the bubble accumulation phenomenon in the process of adding deionized water can be reduced, and the measurement precision is improved. In addition, the potential of the probe can be the same as that of the equipotential ring, and the capacitance distributed between the probe shell and the cable can be effectively eliminated. Therefore, the invention provides a static leveling system, and a plurality of static leveling devices realize the monitoring of the settlement detection of each key part in the vertical direction in a mode of connecting a water pipe and an air pipe in parallel to a server.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of a hydrostatic leveling device in one embodiment.

FIG. 2 is a schematic view of a base of an embodiment of a hydrostatic leveling apparatus.

FIG. 3 is a schematic view of a hydrostatic leveling device in an embodiment of the lower bowl.

FIG. 4 is a side view of the lower bowl with a hydrostatic level assembly in one embodiment.

Fig. 5 is an exploded view of an upper bowl of a hydrostatic leveling apparatus in an embodiment.

FIG. 6 is a schematic view of a target tee of an embodiment of a hydrostatic level apparatus.

FIG. 7 is a side view of a hydrostatic leveling device in one embodiment.

FIG. 8 is a schematic diagram of a control system of a hydrostatic leveling device in one embodiment.

FIG. 9 is a perspective view of a sensor unit of an embodiment of a hydrostatic leveling apparatus.

FIG. 10 is a side view of a sensor cell configuration in an embodiment of a hydrostatic level assembly.

FIG. 11 is a graph of the displacement of the liquid level and the capacitance corresponding to each displacement position of the liquid level for an embodiment of a hydrostatic leveling apparatus.

FIG. 12 is a graph illustrating a stepwise increase in capacitance for each displacement position of the liquid level of an embodiment of a hydrostatic leveling apparatus.

FIG. 13 is a schematic view of a connector of an embodiment of a hydrostatic leveling apparatus.

FIG. 14 is a block diagram of a static leveling system in one embodiment.

FIG. 15 is a schematic diagram of a subsystem of a static leveling system in one embodiment.

FIG. 16 is a graph of capacitance values at various displacement points versus level displacement for one embodiment of a static leveling system.

FIG. 17 is a graph illustrating capacitance values for displacement positions of a liquid level in an embodiment of a static leveling system in a stepwise increasing relationship.

In the drawings, the components represented by the respective reference numerals are listed below:

1 base

11 fixed hole

2 lower pot body

21 first hole

22 second hole

23 third hole

24 trachea

25 water pipe

26 water level datum line

3 upper bowl body

31 column body

32 first connection hole

33 second connection hole

34 third connecting hole

35 cover plate

4 target ball seat

41 magnet

42 fastener

43 hook

5 accommodating space

51 control device

511 control module

5111 control circuit

512 measuring module

5121 measurement circuit

5122 temperature measuring circuit

52 sensor unit

521 fixed pole plate layer

522 protective plate layer

523 cable line interface

524 moving pole plate layer

6 connecting piece

100 static leveling device

200 lifting platform

300 connecting water pipe

400 demarcating pot body

500 displacement platform

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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 the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

In order to improve the detection accuracy of settlement detection, the invention provides a static leveling device, please refer to fig. 1, which includes a base 1, a lower pot 2, an upper pot 3 and a target ball seat 4, wherein the base 1 is fixedly connected with the lower pot 2, the upper pot 3 is connected with the target ball seat 4, the upper pot 3 and the lower pot 2 form a receiving space 5, and a connecting member 6 is arranged in the receiving space 5.

Referring to fig. 1 and 2, in an embodiment of the invention, the shape of the base 1 is, for example, circular or square. The base 1 can include the fixed orifices 11, and the fixed orifices 11 are seted up and are arranged in on the base 1, and run through in the base 1, and the fixed orifices 1 is used for being fixed in the base 1 installation on other equipment of treating the erection. The number of the fixing holes 1 is, for example, at least three, which ensures the stability of the fixing and saves the production cost.

Referring to fig. 1 and 3, in an embodiment of the invention, the lower bowl 2 is fixedly connected to the base 1, the diameter of the lower bowl 2 is smaller than that of the base 1, and the lower bowl 2 is used for containing liquid. The lower pot 2 can comprise a first hole 21, a second hole 22 and a third hole 23, the first hole 21 is arranged on one side of the lower pot 2, the first hole 21 is used for being connected with an air pipe 24 in an installing mode, the air pipe 24 is fixedly connected to the first hole 21, the diameter of the air pipe 24 is equal to that of the first hole 21, and the air pipe 24 is connected with other static leveling devices and used for conveying air. The second hole 22 is provided adjacent to one side of the first hole 21, and the second hole 22 is used for installing a connection water pipe 25. The third hole 23 is oppositely disposed at one side of the second hole 22, and the third hole 23 is used for installing and disposing a thermal resistance detector.

As shown in fig. 3 and 4, the material of the water pipe 25 may be, for example, polyvinyl fluoride. The water pipe 25 is arranged on one side of the lower pot body 2 and fixedly connected to the second hole 22, an included angle is formed between the water pipe 25 and the outer wall of the lower pot body 2, the included angle range between the water pipe 25 and the lower pot body 2 can be 5-15 degrees for example, the included angle between the water pipe 25 and the lower pot body 2 is 10 degrees in the invention, and the included angle can be arranged to reduce the bubble accumulation phenomenon in the deionized water adding process and improve the measurement accuracy. The diameter of the water pipe 25 is equal to that of the second hole 22, and the water pipe 25 is connected to other static leveling devices and transfers deionized water.

Referring to FIG. 4, in one embodiment of the present invention, the water level reference line 26 is located on the inner side wall of the lower bowl body 2. A water level reference line 26 may be disposed above the water pipe 25 and between the air pipe 24 and the water pipe 25. The solution is arranged with a scale mark in the lower pot body 2 by taking the water level datum line 26 as a reference, so that the liquid level height is convenient to adjust, and the displacement change range of the scale mark on the inner wall of the lower pot body 2 is, for example, -6mm to +6 mm.

Referring to fig. 5, in an embodiment of the present invention, the upper bowl 3 is fixedly connected to the upper bowl 2, and the upper bowl 3 is used for accommodating the integrated control circuit. The upper pot 3 may include a column 31, a first connection hole 32, a second connection hole 33, a third connection hole 34 and a cover plate 35, wherein the first connection hole 32 is opened on the column 31, and the first connection hole 32 is used for mounting a power cord. The second connection hole 33 penetrates the column 31 and is located at one side of the first connection hole 32, and the second connection hole 33 may be, for example, a communication interface for mounting a connector for transmitting a thermal resistance signal. The third connecting hole 34 is opened in the column 31 and is oppositely disposed in the first connecting hole 32, and the third connecting hole 34 may be a network interface for installing a network cable, for example. The cover 35 is fixedly connected with the column 31, and the diameter of the cover 35 is equal to that of the column 34.

Referring to fig. 6, in an embodiment of the present invention, the target ball seat 4 is fixedly connected to the upper bowl 3, the target ball seat 4 may include a magnet 41, a fixing member 42 and a hook 43, the magnet 41 is disposed in the fixing member 42, the hook 43 is connected to the fixing member 42 and located above the magnet 41, and the hook 43 may be used to hang the circlip pliers.

Referring to fig. 7, in an embodiment of the invention, the accommodating space 5 is composed of the lower bowl body 3 and the upper bowl body 2, and the accommodating space 5 is used for arranging an electric control system. The accommodating space 5 can comprise a control device 51 and a sensor unit 52, the control device 51 is arranged above the sensor unit 52, and the control device 51 is positioned in the upper pot body 3. As shown in fig. 8, the control device 51 may include a control module 511 and a measurement module 512, wherein a control circuit 5111 is disposed in the control module 511, and the control circuit 5111 provides a two-wire compatible serial interface communication circuit. The control module 511 is arranged at one side of the measuring module 512, the control module 511 is a main controller for controlling the whole static leveling system, and the control module 511 is used for driving the W5500 Ethernet circuit and receiving an upper computer acquisition instruction. The analog integrated communication circuit in the control module 511 drives the measurement module 512, so that the measurement module 512 collects capacitance values, and then transmits the capacitance values collected by the measurement module 512 to an upper computer for display and storage through ethernet communication. The measurement module 512 is internally provided with a measurement circuit 5121 and a temperature measurement circuit 5122, the measurement circuit 5121 and the temperature measurement circuit 5122 are electrically connected with the control module 511, the measurement module 512 provides an excitation source of standard alternating current excitation, and the measurement module 512 is loaded to the sensor unit 52 to realize capacitance detection. The measurement circuit 5121 is loaded on the pin of the equipotential ring to provide the same potential as the equipotential ring, so that the capacitance distributed between the probe shell and the cable can be effectively eliminated. The temperature measuring circuit 5122 is used for detecting the ambient temperature.

Referring to fig. 7, 9 and 10, in an embodiment of the invention, the sensor unit 52 can be disposed above the water level reference line 26, and specifically, the sensor unit 52 is located above the position of the maximum displacement variation range from the calibration mark for measuring the liquid level in the lower bowl 2. The sensor unit 52 is located, for example, 500um above the scale mark at a distance of +6mm in the present invention, preventing the sensor unit 52 from being soaked in water during use. The sensor unit 52 may comprise a capacitive sensor, which may be, for example, an alumina ceramic substrate, or a temperature sensor, in which the alumina content may be, for example, 96%, deposited with a palladium silver paste for forming a unipolar thick-film capacitor. The capacitive sensor may comprise, for example, a monopole thick film capacitor, an insulating structure, such as polytetrafluoroethylene, and a cable, such as a coaxial shielded cable, soldered to the monopole thick film capacitor via the insulating structure and positioned on the back side of the monopole thick film capacitor. The temperature sensor may be, for example, a high-precision thermistor, which may improve the accuracy of the measurement of the ambient temperature.

As shown in fig. 9 and 10, the thickness of the unipolar thick-film capacitor may range from 0.5mm to 1.5mm, for example, and the thickness of the unipolar thick-film capacitor may be 1mm, for example. Because there is edge effect in its during operation, monopole thick film capacitor can be including the protection utmost point and decide the utmost point, and the protection utmost point sets up in the outer lane of deciding the utmost point, and the protection utmost point and the surface spraying tri-proof lacquer of deciding the utmost point for monopole thick film capacitor has waterproof function, and increases initial capacitance. Specifically, the monopole thick film capacitor may further include a fixed plate layer 521, a protection plate layer 522, a cable interface 532 and a movable plate layer 524, the fixed plate layer 521 is disposed at the center of the uniform magnetic field, the diameter of the fixed plate layer may range from 15mm to 20mm, for example, the diameter of the fixed plate layer 521 is 18mm, for example, the fixed plate layer 521 forms a fixed plate, and is used for effectively measuring an electrode on the monopole thick film capacitor. The gap between the fixed plate layer 521 and the protection plate layer 522 may be, for example, 0.5mm to 1mm, and the gap between the fixed plate layer 521 and the protection plate layer 522 may be, for example, 0.6mm, and as the gap between the fixed plate layer 521 and the protection plate layer 522 changes, the capacitance value of the unipolar thick-film capacitor changes, and thus the resolution of the capacitive sensor changes. The protective plate layers 522 are arranged on two sides of the fixed plate layer 521, the protective plate layers 522 are used for forming a protective electrode, the protective electrode surrounds the outer ring of the fixed plate and is separated from the fixed plate to keep electrical insulation, the protective electrode can improve the edge effect during effective electrode measurement, and the nonlinear error generated by the effect is reduced.

Referring to fig. 10, 11 and 12, in the embodiment of the invention, when the gap between the stator plate layer 521 and the protection plate layer 522 is continuously decreased, the resolution of the displacement variation of the capacitive sensor is higher and higher. Specifically, the liquid level in the lower pot body 2 is displaced by the high-precision displacement table, the displacement variation of the preset liquid level is 1um, the initial position of the limited liquid level is +5.5mm, and capacitance values corresponding to the displacement positions of the liquid level are obtained along with the upward displacement distance to the maximum value or the downward movement minimum value of the liquid level along the water level datum line 26. As shown in fig. 11, the relationship between the displacement amount of the liquid level and the capacitance value corresponding to each displacement position of the liquid level should correspond to a non-linear increase. As shown in fig. 12, as the displacement of the liquid level increases, the capacitance corresponding to each displacement position of the liquid level increases in a stepwise manner, so that the capacitance sensor satisfies the resolution of 1 um.

Referring to fig. 7, 9 and 10, in an embodiment of the invention, the number of the cable wire interfaces 532 is at least two, and the at least two cable wire interfaces 532 are respectively disposed on the protection plate layer 522 and the stator plate layer 521 for connecting cables. The movable pole plate layer 524 is arranged on one side, away from the protective plate layer 522 and the fixed pole plate layer 521, relatively, and the movable pole plate layer 524, the protective plate layer 522 and the fixed pole plate layer 521 form a uniform magnetic field, so that the measurement accuracy of the capacitive sensor is improved.

Referring to fig. 13, in one embodiment of the invention, a connecting member 6 is disposed in the receiving space 5, and the connecting member 6 is used to fixedly connect the upper bowl body 3 and the lower bowl body 2. Connecting piece 6 can include fixing device, and fixing device for example can be the screw, and the screw for example can be no magnetism screw, and no magnetism screw can reduce the magnetic field scattering in accommodation space 5 for capacitive sensor work is more stable, improves capacitive sensor output capacitance's stability, and then improves and subsides the detection precision.

Referring to fig. 14, the present invention provides a static leveling system, which may include a plurality of static leveling apparatuses 100 connected in parallel to a server through a water pipe 25 and an air pipe 24, and may improve measurement sensitivity, so that the measurement sensitivity of the static leveling system is improved by 2 um.

Referring to fig. 15, in an embodiment of the present invention, the static leveling device 100 is disposed on the lifting platform 200, and is connected to the calibration bowl 400 through the connection water pipe 300, the calibration bowl 400 is disposed on the high-precision displacement platform 500, and the central axis of the calibration bowl 400 and the central axis of the displacement platform 500 are on the same straight line, so as to form a static leveling control system, which can eliminate abbe error.

Referring to fig. 15, 16 and 17, in an embodiment of the present invention, the hydrostatic level control system operates on the principle that the liquid level height in the hydrostatic level apparatus 100 is changed by 20um by using the high-precision displacement table 500. Specifically, the initial position of the liquid level is defined to be-6 mm, and when the liquid level moves upwards to +6mm, capacitance values of all displacement points of the liquid level are obtained, so that the static level control system improves the measurement precision and the measurement resolution. As shown in fig. 16, the capacitance values at each displacement point of the liquid level should follow a non-linear relationship as the liquid level is displaced. As shown in fig. 17, as the displacement of the liquid level changes, the capacitance value corresponding to each displacement position of the liquid level increases in a stepwise manner, so that the static level control system improves the measurement accuracy and the measurement resolution.

In summary, the present invention provides a hydrostatic leveling device, which realizes a full immersion type capacitive hydrostatic leveling device by a built-in sensor unit and a control device, so as to improve displacement variation of a unit gap of capacitive detection and improve displacement variation resolution.

The invention provides a static leveling system, wherein a plurality of static leveling devices realize the monitoring of the settlement detection of each key part in the vertical direction in a mode of connecting a water pipe and an air pipe in parallel to a server.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A hydrostatic levelling device, characterised by at least:

a base;

2. A hydrostatic leveling device according to claim 1 wherein the upper bowl body further includes:

the network interface is arranged on the upper pot body;

a communication interface disposed on one side of the network interface.

3. A hydrostatic levelling device according to claim 1 or claim 2, wherein a sensor unit is provided within the receiving space for measuring the position of the liquid level within the lower bowl.

4. A static leveling device according to claim 3 wherein the sensor unit comprises a unipolar thick film capacitor comprising:

a fixed pole plate layer;

the protective plate layers are arranged on two sides of the fixed pole plate layer;

and the movable pole plate layer is oppositely arranged on one side departing from the protective plate layer and the fixed pole plate layer.

5. A static leveling device according to claim 4 wherein the thickness of the monopole thick film capacitor is in the range 0.5mm to 1.5 mm.

6. A static levelling apparatus according to claim 4 wherein the pole plate layer has a diameter in the range 15mm to 20 mm.

7. A static leveling device according to claim 4 wherein the gap between the stator plate layer and the protective plate layer is in the range 0.5mm to 1 mm.

8. A static leveling device according to claim 1 wherein the receiving space further comprises:

the control module is arranged in the upper bowl body;

and the measuring module comprises a measuring circuit and a temperature measuring circuit, the measuring module is arranged on one side of the control module, and the measuring circuit is electrically connected with the temperature measuring circuit and the control module.

9. A hydrostatic leveling device in accordance with claim 8 wherein the measurement module is disposed within the lower bowl.

10. A static leveling system, comprising:

a server;

a plurality of hydrostatic level units connected to the server;

wherein the hydrostatic leveling device comprises:

a base;