Automatic lifting and weighing device for a measuring cylinder and method of use

Abstract

The application discloses an automatic lifting and weighing device for a measuring cylinder, which comprises a measuring cylinder body, a support, a weighing system, a lifting system and a control system. The measuring cylinder body is a bottomed cylinder with an open top, and a positioning support pin is arranged on the outer side wall of the measuring cylinder body. The support is used for supporting the measuring cylinder body, and a support limiting female port matched with the positioning support pin is arranged on the support. The weighing system is arranged in the support and is used for weighing the measuring cylinder body. The lifting system is fixed to the bottom of the support and is used for driving the weighing system to lift in the vertical direction. The control system is signal-connected with the weighing system and the lifting system respectively. The lifting system is arranged to drive the weighing system to lift, the weighing sensor is completely separated from the measuring cylinder and is automatically zeroed in the non-weighing state, the creep effect and zero point drift of the sensor caused by long-term continuous bearing are fundamentally avoided, and the accuracy and reliability of long-term monitoring data are remarkably improved.

Description

Technical Field

[0001] This invention relates to the fields of farmland irrigation, agricultural meteorology, and experimental equipment technology, specifically to an automatic lifting and weighing device for measuring cylinders and its usage method. Background Technology

[0002] The lysimeter is a standard experimental device used to measure soil evapotranspiration and soil moisture changes. Its basic principle is to invert crop transpiration and evaporation by measuring changes in soil water storage. It is widely used in scientific research scenarios such as quantitative research on farmland water balance and analysis of crop water consumption patterns. As the core measuring element of the lysimeter, the accuracy and long-term stability of the weighing sensor directly determine the validity of the data.

[0003] Currently, conventional lysostats mostly adopt a fixed direct-weighing structure, in which the bottom of the measuring cylinder is directly fixed to the weighing sensor to achieve continuous weighing. However, this structure has inherent defects: under long-term continuous load, stress accumulates inside the metal material of the weighing sensor's elastic body, causing creep effect and zero drift. At the same time, fluctuations in ambient temperature also affect the sensor's sensitivity and zero position. More importantly, existing weighing systems cannot be zeroed online during measurement, and accumulated errors cannot be eliminated. To alleviate the above problems, existing technologies mostly use imported high-precision sensors, which not only significantly increases equipment costs but also fails to eliminate the systematic errors caused by creep at the root.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic lifting and weighing device for measuring cylinders, so as to solve the problem mentioned in the background art that the existing measuring cylinder weighing devices suffer from creep drift due to long-term sensor load and cannot be zeroed online, thus affecting the measurement accuracy.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An automatic lifting and weighing device for a measuring cylinder includes: The measuring cylinder body is a bottomed cylinder with an open top, and a positioning support pin is provided on its outer side wall. A bracket is provided to support the measuring cylinder body, and the bracket is provided with a support limiting female mouth that is adapted to the positioning support pin; A weighing system, installed inside the bracket, is used to weigh the measuring cylinder body; A lifting system, fixed to the bottom of the bracket, is used to drive the weighing system to move vertically upwards and downwards; and The control system is connected to the weighing system and the lifting system respectively, and is used to control the operation of the lifting system and receive data from the weighing system.

[0007] Furthermore, the measuring cylinder body also includes a lifting lug, a measuring cylinder wall, and a measuring cylinder bottom; The lifting lugs are provided in two sets, symmetrically arranged on the upper eaves of the measuring cylinder body; The positioning support pins are right-angled positioning support pins, and there are four of them, which are fixed in a cross shape to the upper middle part of the measuring cylinder wall. A drain valve is provided on the bottom of the measuring cylinder.

[0008] Furthermore, the support also includes a crossbeam, legs, and a bottom support rod; The support limiting female port is an M-type support limiting female port. Each crossbeam has an M-type support limiting female port fixedly connected to the middle of its upper end. The M-type support limiting female port and the positioning support pin form a male-female positioning fit to support the measuring cylinder body.

[0009] Furthermore, the weighing system includes a tray, a weighing sensor, and a sensor connection plate; The tray is located at the upper part of one end of the weighing sensor, and the sensor connecting plate is located at the lower part of the other end of the weighing sensor. The center point of the tray and the center point of the weighing sensor are longitudinally coincident.

[0010] Furthermore, the lifting system includes a push rod and a power unit for driving the push rod to lift. The upper end of the push rod is fixedly connected to the lower end of the sensor connecting plate, and the push rod coincides with the center point of the measuring cylinder body and the weighing sensor.

[0011] Furthermore, the lifting system has a limiting function, and the push rod can only move up and down during the lifting process and does not rotate. The power unit is a low-voltage DC motor.

[0012] Furthermore, the hardware architecture of the control system includes a microcontroller, a lifting control module, a data acquisition and storage module, a data transmission port, and a digital display screen; The control system uses software programming to coordinate the actions of the lifting system and the weighing system, zero the weighing, and collect and transmit data.

[0013] Furthermore, the supporting limiting female port and the positioning supporting pin maintain contact and support in a non-weighing state; When the lifting system drives the weighing system to rise, the pallet lifts the measuring cylinder body, causing the positioning support pin to separate from the support limiting female port.

[0014] Furthermore, this invention also proposes an automatic lifting and weighing device for measuring cylinders and a method for using it to weigh the measuring cylinders, comprising the following steps: S1: Place the measuring cylinder body to be weighed on the bracket, so that the positioning support pin (13) of the measuring cylinder body is engaged with the support limiting female port of the bracket. S2: In the initial state, the lifting system is in the lowering position, the weighing system's tray and the bottom of the measuring cylinder body maintain a gap, and the weighing system is in the automatic zeroing state; S3: During weighing, the control system controls the lifting system to rise, and lifts the measuring cylinder body through the tray, so that the positioning support pin is separated from the support limit female port, and the entire weight of the measuring cylinder body is applied to the weighing system. S4: The weighing system collects weight data and transmits it to the control system; S5: After weighing is completed, the control system controls the lifting system to descend, so that the measuring cylinder body falls back onto the support. The positioning support pin and the support limit female port re-engage, and the weighing system returns to a non-stressed state and automatically zeros.

[0015] Furthermore, in step S3, after the lifting system is raised, it waits stably for a first preset time, and then the weighing system performs multiple consecutive weighings and takes the average value as the weighing result. In step S5, after the lifting system descends and returns to the non-weighing state, the weighing system automatically zeros after a second preset time.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a lifting system to drive the weighing system to rise and fall, so that the weighing sensor is completely separated from the measuring cylinder and automatically zeroed when not weighing. This fundamentally avoids the creep effect and zero drift caused by long-term continuous load on the sensor, and significantly improves the accuracy and reliability of long-term monitoring data.

[0017] 2. The present invention forms a male-female positioning system by using a right-angle female-mouth positioning support pin on the measuring cylinder body and an M-shaped support limiting female-mouth on the bracket. This system ensures the stability and repeatability of the measuring cylinder placement, and enables the rapid lifting and lowering of the measuring cylinder during weighing. The structure is simple and the operation is convenient.

[0018] 3. This invention achieves automated control of lifting, weighing, zeroing, data acquisition and transmission through a control system, supports multi-tube network collaborative work, significantly reduces labor costs, improves test efficiency, and is suitable for long-term positioning monitoring. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the structure of the measuring cylinder body of the present invention; Figure 3 This is a schematic diagram of the support structure of the present invention; Figure 4 This is the control flowchart of the present invention.

[0020] Reference numerals in the attached drawings: 1. Measuring cylinder body; 11. Lifting lug; 12. Measuring cylinder wall; 13. Positioning support pin; 14. Drain valve; 15. Measuring cylinder bottom; 2. Bracket; 21. Support limit female port; 22. Crossbeam; 23. Support leg; 24. Bottom support rod; 3. Weighing system; 31. Pallet; 32. Weighing sensor; 33. Sensor connection plate; 4. Lifting system; 41. Push rod; 42. Motor; 5. Control system. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 Please see Figure 1-3 The present invention provides a technical solution: An automatic lifting and weighing device for a measuring cylinder includes: The measuring cylinder body 1 is a bottomed cylinder with an open top, and a positioning support pin 13 is provided on its outer side wall. The bracket 2 is used to support the measuring cylinder body 1. The bracket 2 is provided with a support limiting female opening 21 that is adapted to the positioning support pin 13. Weighing system 3 is installed inside the bracket 2 and is used to weigh the measuring cylinder body 1; The lifting system 4, fixed to the bottom of the bracket 2, is used to drive the weighing system 3 to move vertically upwards and downwards; and The control system 5 is connected to the weighing system 3 and the lifting system 4 respectively, and is used to control the operation of the lifting system 4 and receive data from the weighing system 3.

[0023] As an improvement, the measuring cylinder body 1 also includes a lifting lug 11, a measuring cylinder wall 12, and a measuring cylinder bottom 15; Two sets of lifting lugs 11 are symmetrically arranged on the upper eaves of the measuring cylinder body 1; The positioning support pin 13 is a right-angled positioning support pin, and there are four of them, which are fixed in a cross shape to the upper middle part of the measuring cylinder wall 12. A drain valve 14 is provided on the bottom 15 of the measuring cylinder.

[0024] Furthermore, the bracket 2 also includes a crossbeam 22, a support leg 23, and a bottom support rod 24; The support limiting female port 21 is an M-shaped support limiting female port. Each of the crossbeams 22 has an M-shaped support limiting female port fixedly connected to the middle of its upper end. The M-shaped support limiting female port and the positioning support pin 13 form a male-female positioning fit to support the measuring cylinder body 1.

[0025] Furthermore, the weighing system 3 includes a tray 31, a weighing sensor 32, and a sensor connection plate 33; The tray 31 is disposed on the upper part of one end of the weighing sensor 32, and the sensor connecting plate 33 is disposed on the lower part of the other end of the weighing sensor 32. The center point of the tray 31 and the center point of the weighing sensor 32 are longitudinally coincident.

[0026] The lifting system 4 includes a push rod 41 and a power unit that drives the push rod 41 to lift. The upper end of the push rod 41 is fixedly connected to the lower end of the sensor connecting plate 33, and the push rod 41 coincides with the center point of the measuring cylinder body 1 and the weighing sensor 32.

[0027] In addition, the lifting system 4 has a limiting function, and its push rod 41 can only move up and down during the lifting process and does not rotate. The power unit is a low-voltage DC motor 42.

[0028] As an improvement, the hardware architecture of the control system 5 includes a microcontroller, a lifting control module, a data acquisition and storage module, a data transmission port, and a digital display screen; The control system 5 controls the lifting system 4 and the weighing system 3 through software programming to coordinate their movements, zero the weighing, and collect and transmit data.

[0029] Furthermore, the supporting limiting female port 21 and the positioning support pin 13 maintain contact and support in a non-weighing state; When the lifting system 4 drives the weighing system 3 to rise, the tray 31 lifts the measuring cylinder body 1, causing the positioning support pin 13 to separate from the support limiting female port 21.

[0030] It should be noted that during conventional fixed weighing, the load cell 32 bears the entire weight of the measuring cylinder 1 for a long time. The internal force of its metal elastomer will continuously accumulate, resulting in a creep effect, which causes the zero point to gradually drift and cannot be zeroed and corrected online.

[0031] In this invention, when not weighing, the push rod 41 of the lifting system 4 is in the lowering position, the tray 31 of the weighing system 3 and the bottom 15 of the measuring cylinder body 1 maintain a gap, the entire weight of the measuring cylinder body 1 is borne by the support limiting female port 21 of the bracket 2 and the positioning support pin 13 of the measuring cylinder body 1, and the weighing sensor 32 does not bear any load.

[0032] At this time, the control system 5 controls the weighing system 3 to automatically zero, eliminating zero drift.

[0033] During weighing, the push rod 41 of the lifting system 4 rises and lifts the measuring cylinder body 1 through the tray 31, causing the positioning support pin 13 to separate from the support limit female port 21. The entire weight of the measuring cylinder body 1 is briefly applied to the weighing sensor 32. After weighing is completed, it immediately descends and returns to the separated state.

[0034] Therefore, the load cell 32 is only subjected to force at the moment of measurement, avoiding long-term continuous load and eliminating creep drift at the source. At the same time, it can be zeroed online before each weighing, thus eliminating accumulated errors.

[0035] In this invention, the positioning support pin 13 is a right-angled female positioning support pin, four in number, and fixed in a cross shape to the upper middle part of the measuring cylinder wall 12; the support limiting female port 21 is an M-shaped support limiting female port, fixed to the middle of the upper end of the crossbeam 22. The two form a female-female positioning fit, realizing self-positioning and limiting functions. When the measuring cylinder body 1 is placed, it can automatically center, and it can return to the same position every time it falls back, ensuring the consistency of weighing conditions and avoiding weighing deviation due to placement offset. At the same time, this fit structure can not only stably support the measuring cylinder body 1, but also allow the positioning support pin 13 to smoothly disengage from the support limiting female port 21 when the lifting system 4 drives the tray 31 to lift the bottom 15 of the measuring cylinder; it can also accurately reset when descending. The whole process does not require manual adjustment and is simple to operate.

[0036] Example 2 like Figure 1-4 As shown, an automatic lifting and weighing device for a measuring cylinder is used to weigh the measuring cylinder, and the method of use includes the following steps: S1: Place the measuring cylinder body 1 to be weighed on the bracket 2, so that the positioning support pin 13 of the measuring cylinder body 1 cooperates with the support limiting female port 21 of the bracket 2. S2: In the initial state, the lifting system 4 is in the lowering position, the tray 31 of the weighing system 3 maintains a gap with the bottom of the measuring cylinder body 1, and the weighing system 3 is in the automatic zeroing state. S3: During weighing, the control system 5 controls the lifting system 4 to rise, and lifts the measuring cylinder body 1 through the tray 31, so that the positioning support pin 13 is separated from the support limit female port 21, and the entire weight of the measuring cylinder body 1 is applied to the weighing system 3. S4: Weighing system 3 collects weight data and transmits it to control system 5; S5: After weighing is completed, the control system 5 controls the lifting system 4 to descend, so that the measuring cylinder body 1 falls back onto the bracket 2, the positioning support pin 13 and the support limit female port 21 re-engage, the weighing system 3 returns to the non-stressed state and automatically zeros.

[0037] Furthermore, in step S3, after the lifting system 4 is raised, it waits stably for a first preset time, and then the weighing system 3 performs multiple consecutive weighings and takes the average value as the weighing result. In step S5, after the lifting system 4 descends and returns to the non-weighing state, the weighing system 3 automatically zeros after a second preset time.

[0038] It should be noted that the hardware architecture of the control system 5 in this invention includes a microcontroller, a lifting control module, a data acquisition and storage module, a data transmission port, and a digital display screen. Through software programming, the lifting action of the lifting system 4 can be coordinated with the weighing, zeroing, data acquisition, and transmission of the weighing system 3. The entire weighing process can be executed automatically in a loop without manual intervention. Furthermore, the data acquisition systems of multiple measuring cylinders can be connected in series and networked through the data transmission port. During operation, the order of lifting and weighing of each equipment group is coordinated by programming to avoid power overload. Compared with the traditional method that requires manual operation and recording of each machine, this significantly reduces manpower input and improves the efficiency and continuity of long-term positioning monitoring.

[0039] The specific operating method for this weighing device is as follows: 1. Measuring cylinder fabrication: Based on the experimental design, determine the dimensions of the measuring cylinder body 1 and the support 2. In this case, the measuring cylinder body 1 is a stainless steel cylinder with a diameter of 40 cm and a height of 50 cm; four right-angled positioning support pins 13 are horizontally arranged in a cross shape, with a longitudinal height of 4 cm, a bottom edge 20 cm from the top of the cylinder, and a horizontal length of 3 cm from the vertical cylinder wall. The top lifting lug 11 is a 5 cm diameter ring, and a drain valve 14 is installed 3 cm from the bottom of the cylinder 15.

[0040] 2. Support Structure Fabrication: In this case, support structure 2 is constructed from 2 cm thick stainless steel square tubing. The outer side of the crossbeam 21 is 46 cm long. The height of the support leg 23 depends on the sum of the following: the height h1 of the bottom support rod 24, the height h2 of the machine body after the lifting system 4 has descended, the gap h3 between the tray 31 and the bottom of the measuring cylinder 15, the height h4 of the weighing system 3, and the height h5 from the bottom of the measuring cylinder 15 to the crossbeam 22. In this case, the total height of the support leg 23 is 60 cm, where h1 is 5 cm, h2 is 15 cm, h3 is 1-2 cm, h4 is 8 cm, and h5 is 30 cm. Ensure that the gap between the tray 31 and the bottom of the measuring cylinder 15 remains 1-2 cm after the lift has descended, and that the gap between the right-angle locating support pin 13 and the M-type support limiting female opening is 2-4 cm after the lift has risen.

[0041] 3. Fix the lifting system to the bottom support rod 24. Connect the push rod 41 to the lower end of the sensor connecting plate 33. Connect the other end of the sensor connecting plate 33 to the lower part of the load cell 32. Connect the upper part of the load cell 32 to the tray 31. The center point of the push rod 41, the load cell 32, and the tray 31 should coincide. The maximum load capacity designed should be within the load capacity range of the lifting system 4 and the load cell 32, and the accuracy of the load cell 32 should meet the test requirements. In this case, the test cylinder (under crop planting conditions) weighs approximately 30-60 kg. The selected lifting machine has a vertical lifting capacity of 100 kg, the load cell has a maximum capacity of 100 kg, and the accuracy is 0.01 g.

[0042] 4. Connect the power lines of motor 42 and weighing sensor 32 to control system 5, and connect control system 5 to external power supply and signal transmitter.

[0043] 5. CNC system programming, lifting and weighing control scheme. Set the weighing time, weighing interval, zeroing time, weighing range, and system parameter calibration of the weighing sensor 32, and the lifting time interval and lifting height parameters of the lifting system 4. In this case, the weighing cycle is set to 1 hour. In the non-weighing state, the bottom of the measuring cylinder 15 is separated from the tray 31, and the weighing system 3 automatically zeros. During weighing, after the push rod 41 rises, the tray 31 lifts the bottom of the measuring cylinder 15, and the right-angle positioning support pin 13 separates from the M-type support limit female port 21. After stabilizing for 1 minute, weigh 5 times continuously with an interval of 2 seconds, and take the average value as the weight of this weighing. After 30 seconds, the lift descends and returns to the non-weighing state.

[0044] 6. Parameter Calibration: After the installation and control system of the entire equipment are completed, the weighing parameters should be calibrated first. Based on this case study, the weighing range is approximately 30–50 kg. Without placing the measuring cylinder, standard weights are used to calibrate the parameters at four levels: 0, 20, 40, and 80 kg.

[0045] 7. Conduct the experiment: Put the installed and debugged equipment into operation, first measure the weight of the cylinder, then backfill a certain amount of soil according to the experimental requirements (by measuring the soil moisture content to determine the dry soil weight), and then carry out agronomic techniques such as crop planting and irrigation according to the experimental plan.

[0046] 8. System operation and management: Place the planted measuring cylinder body 1 on the bracket 2, ensure that the right-angle sub-mouth positioning support pin 13 is placed on the M-type support limit female mouth 21, start the weighing program to weigh, collect data and manage daily operation, and repair the instrument if abnormal data is found.

[0047] 9. Determine the quantity to be produced based on the test requirements. Ensure that the production methods are consistent. Connect all data acquisition systems in series. Also, consider the power load. Coordinate the order of lifting and weighing of the elevators when each equipment group is working.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic lifting and weighing device for a measuring cylinder, characterized in that, include: The measuring cylinder body (1) is a bottomed cylinder with an open top, and a positioning support pin (13) is provided on its outer side wall. A bracket (2) is used to support the measuring cylinder body (1). The bracket (2) is provided with a support limiting female port (21) that is adapted to the positioning support pin (13). A weighing system (3) is installed inside the bracket (2) and is used to weigh the measuring cylinder body (1); The lifting system (4) is fixed to the bottom of the bracket (2) and is used to drive the weighing system (3) to move up and down in the vertical direction; as well as The control system (5) is connected to the weighing system (3) and the lifting system (4) respectively, and is used to control the operation of the lifting system (4) and receive data from the weighing system (3).

2. The automatic lifting and weighing device for a measuring cylinder according to claim 1, characterized in that: The measuring cylinder body (1) also includes a lifting lug (11), a measuring cylinder wall (12), and a measuring cylinder bottom (15). The lifting lugs (11) are provided in two sets, symmetrically arranged on the upper eaves of the measuring cylinder body (1); The positioning support pin (13) is a right-angled positioning support pin, and there are four of them, which are fixed in the middle and upper part of the measuring cylinder wall (12) in a cross shape. A drain valve (14) is provided on the bottom (15) of the measuring cylinder.

3. The automatic lifting and weighing device for a measuring cylinder according to claim 1, characterized in that: The bracket (2) also includes a crossbeam (22), legs (23) and a bottom support rod (24); The support limiting female port (21) is an M-type support limiting female port. Each crossbeam (22) has an M-type support limiting female port fixedly connected to the middle of its upper end. The M-type support limiting female port and the positioning support pin (13) form a male-female positioning fit to support the measuring cylinder body (1).

4. The automatic lifting and weighing device for a measuring cylinder according to claim 1, characterized in that: The weighing system (3) includes a tray (31), a weighing sensor (32), and a sensor connection plate (33). The tray (31) is located on the upper part of one end of the weighing sensor (32), and the sensor connecting plate (33) is located on the lower part of the other end of the weighing sensor (32). The center point of the tray (31) and the center point of the weighing sensor (32) are longitudinally coincident.

5. An automatic lifting and weighing device for a measuring cylinder according to claim 4, characterized in that: The lifting system (4) includes a push rod (41) and a power unit that drives the push rod (41) to lift. The upper end of the push rod (41) is fixedly connected to the lower end of the sensor connecting plate (33), and the push rod (41) coincides with the center point of the measuring cylinder body (1) and the weighing sensor (32).

6. An automatic lifting and weighing device for a measuring cylinder according to claim 5, characterized in that: The lifting system (4) has a limiting function, and its push rod (41) can only move up and down and does not rotate during the lifting process; The power unit is a low-voltage DC motor (42).

7. An automatic lifting and weighing device for a measuring cylinder according to claim 6, characterized in that: The hardware architecture of the control system (5) includes a microcontroller, a lifting control module, a data acquisition and storage module, a data transmission port, and a digital display screen; The control system (5) controls the lifting system (4) and the weighing system (3) through software programming to coordinate their movements, zero the weighing, and collect and transmit data.

8. An automatic lifting and weighing device for a measuring cylinder according to claim 7, characterized in that: The supporting limiting female port (21) and the positioning supporting pin (13) maintain contact and support in a non-weighing state; When the lifting system (4) drives the weighing system (3) to rise, the tray (31) lifts the measuring cylinder body (1), causing the positioning support pin (13) to separate from the support limiting female port (21).

9. The automatic lifting and weighing device for a measuring cylinder according to any one of claims 1-8, and its method of use for weighing the measuring cylinder, characterized in that, Includes the following steps: S1: Place the measuring cylinder body (1) to be weighed on the bracket (2) so that the positioning support pin (13) of the measuring cylinder body (1) cooperates with the support limiting female port (21) of the bracket (2); S2: In the initial state, the lifting system (4) is in the lowering position, the tray (31) of the weighing system (3) maintains a gap with the bottom of the measuring cylinder body (1), and the weighing system (3) is in the automatic zeroing state; S3: During weighing, the control system (5) controls the lifting system (4) to rise, and lifts the measuring cylinder body (1) through the tray (31), so that the positioning support pin (13) separates from the support limit female port (21), and the entire weight of the measuring cylinder body (1) acts on the weighing system (3). S4: The weighing system (3) collects weight data and transmits it to the control system (5); S5: After weighing is completed, the control system (5) controls the lifting system (4) to descend, so that the measuring cylinder body (1) falls back onto the bracket (2), the positioning support pin (13) and the support limit female port (21) re-cooperate, and the weighing system (3) returns to the non-stressed state and automatically zeros.

10. The automatic lifting and weighing device for a measuring cylinder according to claim 9, used for weighing the measuring cylinder, characterized in that: In step S3, after the lifting system (4) is raised, it waits stably for a first preset time, and then the weighing system (3) performs multiple consecutive weighings and takes the average value as the weighing result. In step S5, after the lifting system (4) descends and returns to the non-weighing state, the weighing system (3) automatically resets to zero after a second preset time.

Images