Densitometer design method and system suitable for long-distance non-contact observation of unmanned equipment

Abstract

The present invention discloses a density meter design method and system suitable for long-distance non-contact observation of unmanned equipment, which relates to the technical field of auxiliary tool design for unmanned measurement equipment, including: qualitatively giving the shape of a float, wherein the float is composed of a cylindrical upper column, a cylindrical lower column and a counterweight ball; obtaining design basis variables according to the shape of the float, inputting the design basis variables into an expression of variables to be designed based on the design basis variables, and calculating the variables to be designed, wherein the design basis variables include liquid pool constraint variables and design constraint variables; using the obtained variables to be designed to perform depth constraint criterion, if the depth constraint criterion is not met, adjusting the design basis variables until the depth constraint criterion is met, and if the depth constraint criterion is met, designing a density meter according to the variables to be designed.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary tool design for unmanned measuring equipment, and in particular to a design method and system of a density meter suitable for long-distance non-contact observation of unmanned equipment. Background Art

[0002] To measure the density of a liquid pool in an open environment, workers are usually required to arrive at the site to take liquid samples, then put a Baume meter in the container and manually read the liquid density value. However, when there are a large number of open liquid pools and they are widely distributed, the inspection labor intensity is high and the work efficiency is low. If there is a need for frequent inspections, the workers will consume a lot of physical strength and energy during the transfer process, which may also affect the measurement quality. In addition, the labor cost caused by the manual method is high.

[0003] In recent years, a common practice is to install radar level gauges or contact electronic level gauges in each liquid pool to achieve automated detection, which provides an effective way to solve the above-mentioned manual problems. However, when there are many liquid pools to be measured, installing an active device for each pool requires earthwork, electrical and communication modifications around the liquid pool, and the hardware and construction costs are high. In addition, the equipment needs to be regularly maintained in the later stage, and the cost of use is high, especially for field conditions. If the liquid is corrosive, the maintenance of the contact electronic level gauge is more difficult and the cost of use is higher.

[0004] With the popularization of unmanned inspection technology equipment, a low-cost, easy-to-observe density meter is needed to complete the liquid pool density inspection task. Summary of the invention

[0005] In order to solve the deficiencies mentioned in the above background technology, the purpose of the present invention is to provide a density meter design method and system suitable for long-distance non-contact observation by unmanned equipment.

[0006] In a first aspect, the purpose of the present invention can be achieved by the following technical solution: a method for designing a densitometer suitable for long-distance non-contact observation by unmanned equipment, the method comprising the following steps:

[0007] The shape of the buoy is qualitatively given, wherein the buoy is composed of a cylindrical upper column, a cylindrical lower column and a counterweight ball;

[0008] Obtaining design basis variables according to the shape of the buoy, inputting the design basis variables into expressions of variables to be designed, and calculating the variables to be designed, wherein the design basis variables include liquid pool constraint variables and design constraint variables;

[0009] The obtained variables to be designed are used to perform depth constraint criterion. If the depth constraint criterion is not met, the design basis variables are adjusted until the depth constraint criterion is met. If the depth constraint criterion is met, the density meter is designed according to the variables to be designed.

[0010] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the radius of the cylindrical upper column of the float is smaller than the radius of the cylindrical lower column, so as to increase the change in suspension depth corresponding to each Baume value. When in use, the float is suspended in the measured liquid, and the exposed length or exposed scale of the float is converted into the density of the measured liquid.

[0011] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the maximum measurable density of the cylindrical upper column The corresponding depth below the waterline is The top of the cylindrical column is painted with a brightly colored paint that is different from the side of the column, and the edge to According to the application needs, the scale lines with Baume density values ​​are evenly set for the remote visual equipment of the unmanned equipment to directly read the density value, or the specific visual distance measuring equipment of the unmanned equipment to measure the distance between the top surface of the upper column and the measured liquid surface. , and then the liquid density value is obtained according to the conversion method.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: the liquid pool constraint variable includes: the maximum measurable Baume density value of the measured liquid , corresponding to the minimum upper column marking height ; The minimum measurable Baume density value of the measured liquid , corresponding to the maximum upper column marked height ; Measurable Baume value range ; Maximum depth of the liquid being measured .

[0013] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the design constraint variables include: suspension resolution , which indicates the change in suspension depth corresponding to each wave value, and is related to the length observation sensitivity of the unmanned equipment; the cross-sectional area of ​​the upper column , cylindrical upper column radius , determined by the observation limit of unmanned equipment; the mass ratio of the cavity column material to the counterweight ball ; Density of hollow column material ; Weight ball material density ; Average thickness of cavity column .

[0014] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: the variables to be designed include the cross-sectional area of ​​the cylindrical lower column , cylindrical lower column radius , cylindrical lower column height , height above the liquid surface of the cylindrical upper column , the volume of the weighted ball and the total mass of the suspended density meter .

[0015] In combination with the first aspect, in some implementations of the first aspect, the method further includes: a calculation process of the variables to be designed is as follows:

[0016] make, ,in, is the cross-sectional area of ​​the upper column, is the suspension resolution, k is the Baume value at a certain temperature and the international unit g / cm 3 The conversion constant, , To correspond to the minimum upper column marking height, is the minimum measurable Baume density value of the measured liquid, To correspond to the maximum upper column marking height, , It is the maximum measurable Baume density value of the measured liquid.

[0017] The total mass of the suspended densitometer is,

[0018] in, for The corresponding SI unit is is the cross-sectional area of ​​the upper column, Mark the height corresponding to the minimum upper column.

[0019] Total mass of upper and lower columns for:

[0020]

[0021] Weight ball mass for:

[0022]

[0023] Weight ball volume for:

[0024]

[0025] Radius of weight ball for:

[0026]

[0027] The relational expression is:

[0028]

[0029] in, is the radius of the cylindrical lower column, , is the radius of the cylindrical upper column, is the average thickness of the cavity column, is the height above the liquid surface of the cylindrical upper column, , is the total mass of the upper and lower columns, is the density of the hollow column material, To correspond to the maximum upper column marking height, is the volume of the weighted ball.

[0030] According to the minimum liquid density when the density meter is exposed Determine the radius , note that the expression is a quartic equation with four solutions, and take the positive real number solution as the radius The solution;

[0031] The height of the lower column is:

[0032]

[0033] The depth constraint criteria are as follows:

[0034]

[0035] If the depth constraint criteria are met, the design is complete.

[0036] In combination with the first aspect, in some implementations of the first aspect, the method further includes: The calculation formula is:

[0037]

[0038] In the formula, Be min is the minimum measurable Baume density value of the measured liquid, h 0 is the height above the liquid surface of the cylindrical upper column, is the suspension resolution, It is a specific visual distance measuring device for unmanned equipment to measure the distance between the top surface of the upper column and the measured liquid surface.

[0039] In a second aspect, in order to achieve the above-mentioned object, the present invention discloses a density meter design system suitable for long-distance non-contact observation of unmanned equipment, comprising:

[0040] The buoy design module is used to qualitatively give the shape of the buoy, where the buoy consists of a cylindrical upper column, a cylindrical lower column and a counterweight ball;

[0041] A variable calculation module, used for obtaining design basis variables according to the shape of the buoy, inputting the design basis variables into the expression of the variables to be designed, and calculating the variables to be designed, wherein the design basis variables include the liquid pool constraint variables and the design constraint variables;

[0042] The density meter design module is used to use the obtained variables to be designed to perform depth constraint criterion. If the depth constraint criterion is not met, the design basis variables are adjusted until the depth constraint criterion is met. If the depth constraint criterion is met, the density meter is designed according to the variables to be designed.

[0043] In combination with the second aspect, in some implementations of the second aspect, the system further includes: the radius of the cylindrical upper column of the float in the float design module is smaller than the radius of the cylindrical lower column, so as to increase the change in suspension depth corresponding to each Baume value. When in use, the float is suspended in the measured liquid, and the length or scale exposed by the float is converted into the density of the measured liquid;

[0044] Maximum measurable density of cylindrical upper column in buoy design module The corresponding depth below the waterline is The top of the cylindrical column is painted with a brightly colored paint that is different from the side of the column, and the edge to According to the application needs, the scale lines with Baume density values ​​are evenly set for the remote visual equipment of the unmanned equipment to directly read the density value, or the specific visual distance measuring equipment of the unmanned equipment to measure the distance between the top surface of the upper column and the measured liquid surface. , and then obtain the liquid density value according to the conversion method;

[0045] The liquid pool constraint variables in the variable calculation module include: the maximum measurable Baume density value of the measured liquid , corresponding to the minimum upper column marking height ; The minimum measurable Baume density value of the measured liquid , corresponding to the maximum upper column marked height ; Measurable Baume value range ; Maximum depth of the liquid being measured ;

[0046] The design constraint variables in the variable calculation module include: suspension resolution , indicating the change in suspension depth corresponding to each Bomei value; the cross-sectional area of ​​the upper column , cylindrical upper column radius , determined by the observation limit of unmanned equipment; the mass ratio of the cavity column material to the counterweight ball ; Density of hollow column material ; Weight ball material density ; Average thickness of cavity column ;

[0047] The variables to be designed in the variable calculation module include the cross-sectional area of ​​the cylindrical lower column , cylindrical lower column radius , cylindrical lower column height , height above the liquid surface of the cylindrical upper column , the volume of the weighted ball and the total mass of the suspended density meter ;

[0048] The calculation process of the variables to be designed in the density meter design module is as follows:

[0049] make, ,in, is the cross-sectional area of ​​the upper column, is the suspension resolution, k is the Baume value at a certain temperature and the international unit g / cm 3 The conversion constant, , To correspond to the minimum upper column marking height, is the minimum measurable Baume density value of the measured liquid, To correspond to the maximum upper column marking height, , It is the maximum measurable Baume density value of the measured liquid.

[0050] The total mass of the suspended densitometer is,

[0051] in, for The corresponding SI unit is is the cross-sectional area of ​​the upper column, Mark the height corresponding to the minimum upper column.

[0052] Total mass of upper and lower columns for:

[0053]

[0054] Weight ball mass for:

[0055]

[0056] Weight ball volume for:

[0057]

[0058] Radius of weight ball for:

[0059]

[0060] The relational expression is:

[0061]

[0062] in, is the radius of the cylindrical lower column, , is the radius of the cylindrical upper column, is the average thickness of the cavity column, is the height above the liquid surface of the cylindrical upper column, , is the total mass of the upper and lower columns, is the density of the hollow column material, To correspond to the maximum upper column marking height, is the volume of the weighted ball.

[0063] According to the minimum liquid density when the density meter is exposed Determine the radius , note that the expression is a quartic equation with four solutions, and take the positive real number solution as the radius The solution;

[0064] The height of the lower column is:

[0065]

[0066] The depth constraint criteria are as follows:

[0067]

[0068] If the depth constraint criteria are met, the design is complete.

[0069] Beneficial effects of the present invention:

[0070] The unmanned device of the present invention can obtain the liquid density value by directly reading the obvious scale value on the density meter, or measuring the distance between the top surface of the column on the density meter and the measured liquid surface, and then converting it. The designed suspension density meter has the advantages of simple structure, low manufacturing and application cost, convenient maintenance and use, and no need to modify the measured liquid pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0072] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0073] Figure 2 It is a schematic diagram of the geometric structure of the suspension densitometer of the present invention;

[0074] Figure 3 The present invention 2 -h 0 -h 2 Schematic diagram of the relationship between

[0075] Figure 4 It is a schematic diagram of the system structure of the present invention;

[0076] In the figure:

[0077] 1. Upper column; 2. Lower column; 3. Dyeing of the top surface of the upper column; 4. Counterweight ball. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0079] Embodiment 1:

[0080] The following is an introduction to the relevant terms involved in the embodiments of the present application:

[0081] like Figure 1 As shown, a method for designing a density meter suitable for long-distance non-contact observation by unmanned equipment comprises the following steps:

[0082] S101: qualitatively giving the shape of the buoy, wherein the buoy is composed of a cylindrical upper column 1, a cylindrical lower column 2 and a counterweight ball 4;

[0083] like Figure 2 The radius of the upper column 1 of the float is designed to be smaller than the radius of the lower column 2, so as to increase the change in the suspension depth corresponding to each Beaut value. When in use, the float is suspended in the measured liquid, and the exposed length or exposed scale of the float is observed by unmanned equipment, and then converted into the density of the measured liquid.

[0084] The maximum measurable density of the cylindrical upper column 1 The corresponding depth below the waterline is The top surface of the cylindrical upper column 1 is dyed 3 with a bright paint different from the color of the side of the column, so that the edge of the top surface is clearly visible. According to the application needs, the scale lines with Baume density values ​​are evenly set for the remote visual equipment of the unmanned equipment to directly read the density value, or the specific visual distance measuring equipment of the unmanned equipment to measure the distance between the top surface of the upper column 1 and the measured liquid surface , and then the liquid density value is obtained according to the conversion method.

[0085] S102: obtaining design basis variables according to the shape of the buoy, inputting the design basis variables into expressions of variables to be designed, and calculating the variables to be designed, wherein the design basis variables include liquid pool constraint variables and design constraint variables;

[0086] Liquid cell constraint variables include the maximum measurable Baume density value of the measured liquid , the corresponding international unit is , corresponding to the minimum upper column 1 marked height ; The minimum measurable Baume density value of the measured liquid , the corresponding international unit is , corresponding to the maximum upper column 1 marked height ; Measurable Baume value range, ; Maximum depth of the liquid being measured The design constraints include suspension resolution , which indicates the change in suspension depth corresponding to each wave value, and is related to the length observation sensitivity of the unmanned equipment; the cross-sectional area of ​​the upper column 1 , radius of cylindrical upper column 1 , which can be determined by the observation limit of unmanned equipment; the mass ratio of the cavity column material to the weight ball 4 ; Density of hollow column material ; Weight ball 4 material density ; Average thickness of cavity column ; At a certain temperature value, the Baume value and the international unit The conversion constant is .

[0087] The variables to be designed include: cross-sectional area of ​​cylindrical lower column 2 , radius of cylindrical lower column 2 , height of cylindrical lower column 2 , height of cylindrical upper column 1 above liquid surface , weighted ball 4 volume , total mass The variables to be designed must all be obtained through calculation.

[0088] S103: Using the obtained variables to be designed to perform depth constraint criterion, if the depth constraint criterion is not satisfied, adjusting the design basis variables until the depth constraint criterion is satisfied, if the depth constraint criterion is satisfied, designing a densitometer according to the variables to be designed.

[0089] The calculation expression of the variables to be designed includes the following steps:

[0090] S1: Order, ,in, is the cross-sectional area of ​​upper column 1, is the suspension resolution, k is the Baume value at a certain temperature and the international unit g / cm 3 The conversion constant, , To correspond to the minimum upper column 1 marked height, is the minimum measurable Baume density value of the measured liquid, To mark the height corresponding to the maximum upper column 1, , It is the maximum measurable Baume density value of the measured liquid.

[0091] The total mass of the suspended densitometer is,

[0092] in, for The corresponding SI unit is is the cross-sectional area of ​​upper column 1, Mark the height corresponding to the minimum upper column 1.

[0093] S2: The total mass of the upper and lower columns is:

[0094]

[0095] S3: The mass of the weighted ball 4 is:

[0096]

[0097] S4: The volume of the weighted ball 4 is:

[0098]

[0099] S5: The radius of the weight ball 4 is:

[0100]

[0101] S6: The relational expression is:

[0102]

[0103] in, is the radius of cylindrical lower column 2, , is the radius of cylindrical upper column 1, is the average thickness of the cavity column, is the height of the cylindrical upper column 1 above the liquid surface, , is the total mass of the upper and lower columns, is the density of the hollow column material, To mark the height corresponding to the maximum upper column 1, The volume of the weighted ball is 4.

[0104] The density meter can be exposed according to the minimum liquid density. Determine the radius , note that the expression is a quartic equation with four solutions, and take the positive real number solution as the radius The solution.

[0105] S7: The height of the lower column 2 is:

[0106]

[0107] S8: Depth constraint criterion:

[0108]

[0109] If the criterion is met, the design is completed, otherwise the design basis variables are readjusted and recalculated.

[0110] Specifically, the present invention is further described below by way of embodiments:

[0111] Proof that the scale lines of the Baume density value can be set evenly:

[0112] Proof: For the buoy with the designed shape, the surface of the upper column 1 is engraved with Baume scale values. Assume that the depth of the upper column 1 below the waterline is , then any liquid density Sometimes:

[0113]

[0114] Assume that at a certain temperature, the Baume value reading is Be, which is related to the density ( ) is .

[0115] Then we have:

[0116] Among them, the heavy table takes the minus sign, and the light table takes the plus sign. Substituting into the above formula, we get:

[0117]

[0118] Visible depth below waterline of upper column 1 It is linearly related to the Baume value Be. Therefore, there exists a constant a that satisfies:

[0119] The proof is complete.

[0120] About the derivation process of the expression:

[0121] The formula for the area of ​​a circle is:

[0122] (1)

[0123] (2)

[0124] According to the principle of buoyancy:

[0125] (3)

[0126] (4)

[0127] make, , (3)-(4), we get

[0128]

[0129]

[0130]

[0131] Substituting the Baume value, we have:

[0132] (5)

[0133] in,

[0134] Therefore, under the liquid pool constraints and design constraints, equation (5) can be completely determined by calculation, and we have

[0135]

[0136] Substituting into (3), we get:

[0137]

[0138] The total mass of the upper and lower columns is:

[0139]

[0140] The mass of the weighted ball 4 is:

[0141]

[0142] The volume of the weighted ball 4 is:

[0143]

[0144] The radius of the weight ball 4 is:

[0145]

[0146] The sum of the material volumes of the upper and lower columns is:

[0147]

[0148] because ,so , substituting into the above formula, we can get The constraint function .

[0149] because

[0150] Simplify to get

[0151] in, ,and

[0152]

[0153] The density meter can be exposed according to the minimum liquid density. Determine the radius , note that the expression is a quartic equation with four solutions, and take the positive real number solution as the radius The solution.

[0154] The height of the lower column 2 is determined by the following expression:

[0155]

[0156] Note that it is also necessary to meet:

[0157]

[0158] because

[0159] so

[0160] This inequality is used as the depth constraint criterion. If the criterion is met, the design is completed, otherwise the design basis variables are readjusted and recalculated.

[0161] Assume the current liquid temperature is 15°C. The design constraints include suspension resolution , indicating the change in suspension depth corresponding to each wave value; the cross-sectional area of ​​upper column 1 , radius of cylindrical upper column 1 , determined by the observation limit of unmanned equipment; the mass ratio of the cavity column material to the weight ball 4 ; The cavity column material is PVC, density ; The material of the weight ball 4 is lead, density ; Average thickness of cavity column The liquid pool constraint variables include the maximum measurable Baume density value of the measured liquid. , the corresponding international unit is , corresponding to the minimum upper column 1 marked height ; The minimum measurable Baume density value of the measured liquid , the corresponding international unit is , calculate the corresponding maximum upper column 1 marked height ; Measurable Baume value range, ; Maximum depth of the liquid being measured .

[0162] Based on the above constraints, it is necessary to calculate the cross-sectional area of ​​the cylindrical lower column 2 , radius of cylindrical lower column 2 , height of cylindrical lower column 2 , height of cylindrical upper column 1 above liquid surface , weighted ball 4 volume , total mass .

[0163] The calculation is as follows:

[0164] S1: Order,

[0165] The total mass of the suspended densitometer is,

[0166] S2: The total mass of the upper and lower columns is:

[0167]

[0168] S3: The mass of the weighted ball 4 is:

[0169]

[0170] S4: The volume of the weighted ball 4 is:

[0171]

[0172] S5: The radius of the weight ball 4 is:

[0173]

[0174] S6: The relational expression is:

[0175]

[0176] in, ,and

[0177]

[0178] The density meter can be exposed at different heights according to the minimum liquid density. , solve the quartic equation and determine the radius Note that there are four solutions, and the positive real number solution is taken as the radius The solution.

[0179] Can get The relationship diagram is as follows Figure 3 As shown;

[0180] S7: According to the expression of the height of the lower column 2:

[0181]

[0182] Figure 3 Also drawn in Relationship curve.

[0183] S8: According to the depth constraint criterion:

[0184]

[0185] Truncation The unreasonable data after the design is completed.

[0186] Embodiment 2: In the second aspect, as Figure 4 As shown, in order to achieve the above-mentioned purpose, the present invention discloses a density meter design system suitable for long-distance non-contact observation of unmanned equipment, comprising:

[0187] The buoy design module 11 is used to qualitatively give the shape of the buoy, wherein the buoy is composed of a cylindrical upper column 1, a cylindrical lower column 2 and a counterweight ball 4;

[0188] The variable calculation module 12 is used to obtain the design basis variables according to the shape of the buoy, and input the design basis variables into the expression of the variables to be designed to calculate the variables to be designed, wherein the design basis variables include the liquid pool constraint variables and the design constraint variables;

[0189] The density meter design module 13 is used to use the obtained variables to be designed to perform depth constraint criterion. If the depth constraint criterion is not satisfied, the design basis variables are adjusted until the depth constraint criterion is satisfied. If the depth constraint criterion is satisfied, the density meter is designed according to the variables to be designed.

[0190] In combination with the second aspect, in some implementations of the second aspect, the system further includes: the radius of the cylindrical upper column 1 of the float in the float design module 11 is smaller than the radius of the cylindrical lower column 2, and when in use, the float is suspended in the measured liquid, and the length or scale exposed by the float is converted into the density of the measured liquid;

[0191] Maximum measurable density of cylindrical upper column 1 in buoy design module 11 The corresponding depth below the waterline is The top surface of the cylindrical upper column 1 is painted with bright paint different from the color of the side of the column, and the edge to According to the application needs, the scale lines with Baume density values ​​are evenly set for the remote visual equipment of the unmanned equipment to directly read the density value, or the specific visual distance measuring equipment of the unmanned equipment to measure the distance between the top surface of the upper column 1 and the measured liquid surface , and then obtain the liquid density value according to the conversion method;

[0192] The liquid pool constraint variables in the variable calculation module 12 include: the maximum measurable Baume density value of the measured liquid , corresponding to the minimum upper column 1 marked height ; The minimum measurable Baume density value of the measured liquid , corresponding to the maximum upper column 1 marked height ; Measurable Baume value range ; Maximum depth of the liquid being measured ;

[0193] The design constraint variables in the variable calculation module 12 include: suspension resolution , indicating the change in suspension depth corresponding to each wave value; the cross-sectional area of ​​upper column 1 , radius of cylindrical upper column 1 , determined by the observation limit of unmanned equipment; the mass ratio of the cavity column material to the weight ball 4 ; Density of hollow column material ; Weight ball 4 material density ; Average thickness of cavity column ;

[0194] The variables to be designed in the variable calculation module 12 include the cross-sectional area of ​​the cylindrical lower column 2 , radius of cylindrical lower column 2 , height of cylindrical lower column 2 , height of cylindrical upper column 1 above liquid surface , weighted ball 4 volume and the total mass of the suspended density meter ;

[0195] The calculation process of the variables to be designed in the density meter design module 13 is as follows:

[0196] make, ,in, is the cross-sectional area of ​​upper column 1, is the suspension resolution, k is the Baume value at a certain temperature and the international unit g / cm 3 The conversion constant, , To correspond to the minimum upper column 1 marked height, is the minimum measurable Baume density value of the measured liquid, To mark the height corresponding to the maximum upper column 1, , It is the maximum measurable Baume density value of the measured liquid.

[0197] The total mass of the suspended densitometer is,

[0198] in, for The corresponding SI unit is is the cross-sectional area of ​​upper column 1, Mark the height corresponding to the minimum upper column 1.

[0199] Total mass of upper and lower columns for:

[0200]

[0201] Weight ball 4 mass for:

[0202]

[0203] Weighted ball 4 volume for:

[0204]

[0205] Weight ball 4 radius for:

[0206]

[0207] The relational expression is:

[0208]

[0209] in, is the radius of cylindrical lower column 2, , is the radius of cylindrical upper column 1, is the average thickness of the cavity column, is the height of the cylindrical upper column 1 above the liquid surface, , is the total mass of the upper and lower columns, is the density of the hollow column material, To mark the height corresponding to the maximum upper column 1, The volume of the weighted ball is 4.

[0210] According to the minimum liquid density when the density meter is exposed Determine the radius , note that the expression is a quartic equation with four solutions, and take the positive real number solution as the radius The solution;

[0211] The height of lower column 2 is:

[0212]

[0213] The depth constraint criteria are as follows:

[0214]

[0215] If the depth constraint criteria are met, the design is complete.

[0216] Based on the same inventive concept, the present invention also provides a computer device, which includes: one or more processors, and a memory for storing one or more computer programs; the program includes program instructions, and the processor is used to execute the program instructions stored in the memory. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is used to implement one or more instructions, specifically for loading and executing one or more instructions in a computer storage medium to implement the above method.

[0217] It should be further explained that, based on the same inventive concept, the present invention also provides a computer storage medium, on which a computer program is stored, and the computer program is executed by the processor to execute the above method. The storage medium can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electrical, magnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0218] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0219] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure may have various changes and improvements, and these changes and improvements fall within the scope of the present disclosure to be protected.

Claims

1. A method for designing a density meter suitable for long-distance non-contact observation by unmanned equipment, characterized in that: The method comprises the following steps: The shape of the buoy is qualitatively given, wherein the buoy is composed of a cylindrical upper column, a cylindrical lower column and a counterweight ball; The radius of the cylindrical upper column of the float is smaller than the radius of the cylindrical lower column. When in use, the float is suspended in the liquid to be measured, and the exposed length or scale of the float is converted into the density of the liquid to be measured; Obtaining design basis variables according to the shape of the buoy, inputting the design basis variables into expressions of variables to be designed, and calculating the variables to be designed, wherein the design basis variables include liquid pool constraint variables and design constraint variables; The liquid pool constraint variables include: the maximum measurable Baume density value of the measured liquid , corresponding to the minimum upper column marking height ; The minimum measurable Baume density value of the measured liquid , corresponding to the maximum upper column marked height ; Measurable Baume value range ; Maximum depth of the measured liquid ; The design constraint variables include: suspension resolution , indicating the change in suspension depth corresponding to each Bomei value; the cross-sectional area of ​​the upper column , cylindrical upper column radius , determined by the observation limit of unmanned equipment; the mass ratio of the cavity column material to the counterweight ball ; Density of hollow column material ; Weight ball material density ; Average thickness of cavity column ; The variables to be designed include the cross-sectional area of ​​the cylindrical lower column , cylindrical lower column radius , cylindrical lower column height , height above the liquid surface of the cylindrical upper column , the volume of the weighted ball and the total mass of the suspended density meter ; The obtained variables to be designed are used to perform depth constraint criterion. If the depth constraint criterion is not satisfied, the design basis variables are adjusted until the depth constraint criterion is satisfied. If the depth constraint criterion is satisfied, the density meter is designed according to the variables to be designed. The depth constraint criteria are as follows: If the depth constraint criteria are met, the design is complete.

2. The method for designing a density meter suitable for long-distance non-contact observation of unmanned equipment according to claim 1 is characterized in that: The maximum measurable density of the cylindrical upper column The corresponding depth below the waterline is The top of the cylindrical column is painted with a brightly colored paint that is different from the side of the column, and the edge to According to the application needs, the scale lines with Baume density values ​​are evenly set for the remote visual equipment of the unmanned equipment to directly read the density value, or the visual distance measuring equipment of the unmanned equipment to measure the distance between the top surface of the upper column and the measured liquid surface , and then the liquid density value is obtained according to the conversion method.

3. The method for designing a density meter suitable for long-distance non-contact observation of unmanned equipment according to claim 1, characterized in that: The calculation process of the variables to be designed is as follows: make, ,in, is the cross-sectional area of ​​the upper column, is the suspension resolution, k is the conversion constant between the Baume value and the international unit value at a certain temperature, , To correspond to the minimum upper column marking height, is the minimum measurable Baume density value of the measured liquid, To correspond to the maximum upper column marking height, , is the maximum measurable Baume density value of the measured liquid; The total mass of the suspended densitometer is, in, for The corresponding SI unit is is the cross-sectional area of ​​the upper column, Mark the height corresponding to the minimum upper column; Total mass of upper and lower columns for: Weight ball mass for: Weight ball volume for: Radius of weight ball for: The relational expression is: in, is the radius of the cylindrical lower column, , is the radius of the cylindrical upper column, is the average thickness of the cavity column, is the height above the liquid surface of the cylindrical upper column, , is the total mass of the upper and lower columns, is the density of the hollow column material, To correspond to the maximum upper column marking height, is the volume of the weighted ball; According to the minimum liquid density when the density meter is exposed Determine the radius , the expression has four solutions, take the positive real number solution as the radius The solution; The height of the lower column is: 。 4. The method for designing a density meter suitable for long-distance non-contact observation by unmanned equipment according to claim 2, characterized in that: The liquid density value The calculation formula is: In the formula, Be min is the minimum measurable Baume density value of the measured liquid, h 0 is the height above the liquid surface of the cylindrical upper column, is the suspension resolution, The visual distance measuring device of unmanned equipment measures the distance between the top surface of the upper column and the measured liquid surface.

5. A density meter design system suitable for long-distance non-contact observation by unmanned equipment, characterized in that: include: The buoy design module is used to qualitatively give the shape of the buoy, where the buoy consists of a cylindrical upper column, a cylindrical lower column and a counterweight ball; The radius of the cylindrical upper column of the float is smaller than the radius of the cylindrical lower column. When in use, the float is suspended in the liquid to be measured, and the exposed length or scale of the float is converted into the density of the liquid to be measured; A variable calculation module, used for obtaining design basis variables according to the shape of the buoy, inputting the design basis variables into the expression of the variables to be designed, and calculating the variables to be designed, wherein the design basis variables include the liquid pool constraint variables and the design constraint variables; The liquid pool constraint variables in the variable calculation module include: the maximum measurable Baume density value of the measured liquid , corresponding to the minimum upper column marking height ; The minimum measurable Baume density value of the measured liquid , corresponding to the maximum upper column marked height ; Measurable Baume value range ; Maximum depth of the measured liquid ; The design constraint variables in the variable calculation module include: suspension resolution , indicating the change in suspension depth corresponding to each Bomei value; the cross-sectional area of ​​the upper column , cylindrical upper column radius , determined by the observation limit of unmanned equipment; the mass ratio of the cavity column material to the counterweight ball ; Density of hollow column material ; Weight ball material density ; Average thickness of cavity column ; The variables to be designed in the variable calculation module include the cross-sectional area of ​​the cylindrical lower column , cylindrical lower column radius , cylindrical lower column height , height above the liquid surface of the cylindrical upper column , the volume of the weighted ball and the total mass of the suspended density meter ; A density meter design module is used to use the obtained variables to be designed to perform depth constraint criterion. If the depth constraint criterion is not satisfied, the design basis variables are adjusted until the depth constraint criterion is satisfied. If the depth constraint criterion is satisfied, the density meter is designed according to the variables to be designed. The depth constraint criteria are as follows: If the depth constraint criteria are met, the design is complete.

6. The density meter design system suitable for long-distance non-contact observation of unmanned equipment according to claim 5 is characterized in that: The maximum measurable density of the cylindrical upper column in the buoy design module The corresponding depth below the waterline is The top of the cylindrical column is painted with a brightly colored paint that is different from the side of the column, and the edge to According to the application needs, the scale lines with Baume density values ​​are evenly set for the remote visual equipment of the unmanned equipment to directly read the density value, or the visual distance measuring equipment of the unmanned equipment to measure the distance between the top surface of the upper column and the measured liquid surface , and then obtain the liquid density value according to the conversion method; The calculation process of the variables to be designed in the density meter design module is as follows: make, ,in, is the cross-sectional area of ​​the upper column, is the suspension resolution, k is the conversion constant between the Baume value and the international unit value at a certain temperature, , To correspond to the minimum upper column marking height, is the minimum measurable Baume density value of the measured liquid, To correspond to the maximum upper column marking height, , is the maximum measurable Baume density value of the measured liquid; The total mass of the suspended densitometer is, in, for The corresponding SI unit is is the cross-sectional area of ​​the upper column, Mark the height corresponding to the minimum upper column; Total mass of upper and lower columns for: Weight ball mass for: Weight ball volume for: Radius of weight ball for: The relational expression is: in, is the radius of the cylindrical lower column, , is the radius of the cylindrical upper column, is the average thickness of the cavity column, is the height above the liquid surface of the cylindrical upper column, , is the total mass of the upper and lower columns, is the density of the hollow column material, To correspond to the maximum upper column marking height, is the volume of the weighted ball; According to the minimum liquid density when the density meter is exposed Determine the radius , the expression has four solutions, take the positive real number solution as the radius The solution; The height of the lower column is: 。

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