A kind of weighing equipment compensation device and ultra-micro weighing system with the compensation device

Abstract

The present application relates to the technical field of weighing balance compensation device, especially to a weighing equipment compensation device and an ultramicro weighing system with the same, wherein the weighing equipment compensation device comprises a shell, the shell is provided with a weighing disc and a wind shield, the weighing disc is arranged in the wind shield, an adjusting assembly, the adjusting assembly comprises an identification mechanism and a separation mechanism, and a balancing assembly, the balancing assembly is arranged in the shell, and the balancing assembly comprises a balancing rod, an electromagnetic mechanism and a gas extraction mechanism; when the present application is used, the space inside the wind shield is separated through the adjusting assembly, the influence of air flow on the measured weight in the use process is reduced, the gas extraction mechanism extracts the same amount of air as the weight, and then the electromagnetic mechanism adjusts the force on the weighing disc through the transmission of the balancing rod, so that the buoyancy received by the weight is balanced.

Description

Technical Field

[0001] This invention relates to the field of balance compensation device technology, specifically to a weighing equipment compensation device and an ultra-micro weighing system having the compensation device. Background Technology

[0002] Electronic precision balances are a product of the integration of sensing technology, analog electronics, digital electronics, and microprocessor technology. They have multiple functions such as automatic calibration, automatic display, tare, automatic data output, automatic fault tracing, and overload protection. When using an electronic balance for weighing, a dust cover is usually used to cover the object being weighed to prevent the influence of gas flow on the weighing process. However, in ultra-micro weighing systems, the buoyancy generated by air on the object already affects the final weighing result. Currently, high-precision measurements are usually performed using a vacuum method, but the cost of creating a vacuum environment is high and the time required is long. Therefore, it is essential to design a weighing equipment compensation device to supplement the buoyancy of the object being weighed during high-precision measurements. Summary of the Invention

[0003] The purpose of this invention is to provide a weighing equipment compensation device and an ultra-micro weighing system having the compensation device, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] On the one hand, a weighing equipment compensation device is provided, comprising:

[0006] The housing is provided with a weighing pan and a windproof cover, and the weighing pan is disposed in the windproof cover;

[0007] An adjustment assembly, comprising an identification mechanism and a partitioning mechanism, wherein the identification mechanism is disposed on the windproof cover and is used to identify the volume and height of the object to be weighed, and the partitioning mechanism is used to partition the space of the windproof cover according to the height measured by the identification mechanism; and

[0008] A balancing assembly is disposed on the housing. The balancing assembly includes a balance bar, an electromagnetic mechanism, and an air extraction mechanism. The electromagnetic mechanism and the air extraction mechanism are respectively disposed on both sides of the balance bar. The electromagnetic mechanism is disposed at the bottom of the weighing pan. The electromagnetic mechanism is used to balance the force on the weighing pan by electromagnetic attraction. The air extraction mechanism is used to extract outside air and adjust the amount of electricity supplied to the electromagnetic mechanism by the gravity of the air.

[0009] Preferably, the identification mechanism is a 3D scanner, which is arranged around the inner wall of the windproof cover. The images acquired by the 3D scanner are used to calculate the height and volume of the object to be weighed.

[0010] Preferably, the separating mechanism includes a partition guide rail, a push rod, and a partition. The partition guide rail is disposed on the side wall of the windproof cover, and the two ends of the push rod are respectively connected to the partition guide rail and the partition. The push rod is used to control the partition to reach above the weighing object.

[0011] Preferably, the partition guide rails are provided in four sets, the four sets of partitions are arranged around the windproof cover, and the push rods are provided in four sets corresponding to the partition guide rails.

[0012] Preferably, the housing has an inner cavity, the balancing component is disposed in the inner cavity, the inner cavity is connected to an air hole, and the air hole is connected to the side wall of the housing.

[0013] Preferably, the inner cavity sidewall is provided with a limiting groove, and the electromagnetic mechanism includes an electromagnet, a first wire, a second wire, a resistance wire rod, and a slider. The electromagnet is located below the weighing pan, and the two ends of the electromagnet are respectively connected to the first wire and the second wire. The first wire is used to connect the resistance wire rod and the electromagnet, and the second wire is used to connect the slider and the electromagnet. The slider is connected to the limiting groove.

[0014] Preferably, an electromagnet is also provided at the bottom of the weighing pan, and the two electromagnets are arranged with their magnetic poles facing each other.

[0015] Preferably, the inner cavity is provided with a support block, the balance bar is connected to the support block, and the slider is connected to one end of the balance bar.

[0016] Preferably, the air extraction mechanism includes a balance block, a one-way valve, an air pump, and a conduit. The balance block is connected to one end of the balance rod, and a cavity is formed inside the balance block. The one-way valve is connected to the cavity, and the air pump is disposed in the cavity. The two ends of the air pump are connected to the air hole and the one-way valve, respectively, through conduits.

[0017] On the other hand, an ultra-micro weighing system is provided, including the aforementioned weighing equipment compensation device.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: During use, the space inside the windproof cover is divided by adjusting the components, reducing the impact of airflow on the measured weight. Simultaneously, the suction mechanism draws air of the same volume as the object being weighed. This air is then transmitted through the balance bar, causing the electromagnetic mechanism to adjust the force on the weighing pan, thereby balancing the buoyancy of the object. Since the entire weighing device is placed in a cleanroom during high-precision weighing, the air drawn by the suction mechanism and the air inside the dustproof cover have the same humidity and temperature. The weight of the drawn air is the buoyancy generated by the air on the object. The present invention is convenient, quick, and low-cost to use, making it worthy of widespread promotion. Attached Figure Description

[0019] Figure 1 This is an isometric view of the structure of the present invention (with part of the windshield cut away);

[0020] Figure 2 This is a side view of the structure of the present invention;

[0021] Figure 3 for Figure 2 A magnified schematic diagram of a portion of area A in the diagram (the arrows in the diagram indicate the direction of gas flow);

[0022] Figure 4 for Figure 2 A magnified schematic diagram of a portion of region B in the middle section.

[0023] In the diagram: 1. Shell, 2. Weighing pan, 3. Windproof cover, 4. 3D scanner, 5. Partition rail, 6. Push rod, 7. Partition, 8. Inner cavity, 9. Balance bar, 10. Electromagnet, 11. Wire 1, 12. Wire 2, 13. Resistance wire rod, 14. Sliding plate, 15. Limiting groove, 16. Support block, 17. Balance block, 18. One-way air valve, 19. Vacuum pump, 20. Tubing. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-4 The present invention provides a technical solution:

[0026] A compensating device for weighing equipment, as shown in the instruction manual. Figure 1 As shown, it includes:

[0027] The housing 1 is used to install other components of this device. The housing 1 is equipped with a weighing pan 2 and a windproof cover 3. The weighing pan 2 is used to support heavy objects. The weighing pan 2 is set in the windproof cover 3. The windproof cover 3 is made of glass and is used to prevent dust from falling onto the weighing pan 2. The windproof cover 3 is also used to prevent airflow from affecting the weighing during weighing. A sliding door is provided on one side of the windproof cover 3 for placing the object to be weighed.

[0028] The adjustment assembly includes an identification mechanism and a partitioning mechanism. The identification mechanism is disposed on the windproof cover 3 and is used to identify the volume and height of the object to be weighed. The partitioning mechanism is used to partition the space of the windproof cover 3 according to the height measured by the identification mechanism.

[0029] The identification mechanism is a 3D scanner 4. The 3D scanner 4 is a Logitech C270 camera controlled by an ATmega328 microcontroller that captures laser line images on the object and then transmits them to PC software for processing and reconstruction. The 3D scanner 4 is arranged around the inner wall of the windproof cover 3. For ease of demonstration, only one 3D scanner 4 is shown on each of the two side walls in the attached diagram of the instruction manual. The 3D scanner 4 can capture images 180 degrees. The images acquired by the 3D scanner 4 are used to calculate the height and volume of the object to be weighed.

[0030] The separation mechanism includes partition rails 5, push rods 6, and partitions 7. The partition rails 5 are set on the side wall of the windproof cover 3. The partition rails 5 are used to install the push rods 6. The two ends of the push rods 6 are connected to the partition rails 5 and the partitions 7, respectively. The push rods 6 are pen-type electric push rods manufactured by Shenzhen Yixing Technology Co., Ltd. The push rods 6 are used to control the partitions 7 to reach above the weighing object. The partitions 7 are made of glass and will not obstruct the 3D scanner 4 from scanning the weighing object. There are four sets of partition rails 5, and the four sets of partitions 7 are set at the four corners of the windproof cover 3. There are four push rods 6 corresponding to the partition rails 5.

[0031] The housing 1 has an inner cavity 8, which is used to install a balancing component. The balancing component is located in the inner cavity 8. The inner cavity 8 is connected to an air hole. One-way air valve 18 is also provided at one end of the air hole. The air hole is used to connect the air pump to the outside. The air hole is connected to the side wall of the housing 1.

[0032] The balancing component is located in the housing 1. The balancing component includes a balancing plate 9, an electromagnetic mechanism, and an air extraction mechanism. The electromagnetic mechanism and the air extraction mechanism are respectively located on both sides of the balancing plate 9. The electromagnetic mechanism is located at the bottom of the weighing pan 2. The electromagnetic mechanism is used to balance the force on the weighing pan 2 by electromagnetic attraction. The air extraction mechanism is used to extract outside air and adjust the amount of electricity supplied to the electromagnetic mechanism by the gravity of the air.

[0033] The inner cavity 8 has a limiting groove 15 on its side wall. The limiting groove 15 is used to prevent the slider 14 from moving while it is being installed, so that the slider 14 can only move along the limiting groove 15. The electromagnetic mechanism includes an electromagnet 10, a first wire 11, a second wire 12, a resistance wire rod 13 and a slider 14. The electromagnet 10 is located below the weighing pan 2. The two ends of the electromagnet 10 are respectively connected to the first wire 11 and the second wire 12. The resistance wire rod 13 is located in the inner cavity 8. The resistance wire rod 13 and the limiting groove 15 are arranged parallel to each other. The first wire 11 and the second wire 12 are both used for conducting electricity. The first wire 11 is used to connect the resistance wire rod 13 and the electromagnet 10. The second wire 12 is used to connect the slider 14 and the electromagnet 10. The second wire 12 is connected to the slider 14, the power supply and the electromagnet 10 in sequence. One end of the slider 14 abuts against the resistance wire and the slider 14 is connected to the limiting groove 15. An electromagnet 10 is also installed at the bottom of the weighing pan 2. The two electromagnets 10 are arranged with the same magnetic poles facing each other. The electromagnet 10 at the bottom of the weighing pan 2 is continuously energized. Therefore, when no external force is applied to the weighing pan 2, the weighing sensor at the bottom of the weighing pan 2 has already detected the gravity and attraction force of the electromagnet 10 at the bottom of the weighing pan 2. When zeroing, the gravity and attraction force generated by the electromagnet 10 at the bottom of the weighing pan 2 have been discharged, and only the mutual repulsion force between the two electromagnets affects the weighing pan 2.

[0034] The inner cavity 8 is fixedly connected to a support block 16, which provides a fulcrum for the rotation of the balance bar 9. The balance bar 9 is rotatably connected to the support block 16, and the slider 14 is rotatably connected to one end of the balance bar 9.

[0035] The air extraction mechanism includes a balance block 17, a one-way valve 18, an air pump 19, and a conduit 20. The balance block 17 is connected to one end of the balance bar 9 and is used to absorb compressed air from the outside. The balance block 17 has a cavity inside, and the one-way valve 18 is connected to the cavity. The one-way valve 18 is used to ensure that the extracted air can only rotate in one direction. The air pump 19 is located in the inner cavity 8. The air pump 19 is existing technology and can be directly purchased. The two ends of the air pump 19 are connected to the air hole and the one-way valve 18 respectively through the conduit 20.

[0036] Working principle: First, zero the weighing device. Place the object to be weighed inside the windproof cover 3, then close the windproof cover 3. The 3D scanner 4, located on the side wall of the windproof cover 3, will scan the object and calculate its height and volume (without subtracting the internal empty volume) based on its shape. At this point, based on the measured height of the object, the push rod 6 will push the partition 7 along the partition guide rail 5 until the partition 7 stops 1 cm above the object. If the object is solid, the air pump will directly draw air of the same volume as the object into the cavity. If the object is not solid, the user needs to... Input the correction coefficient (i.e., the volume of the hollow object being weighed / the volume of the object being weighed as measured by the 3D scanner 4), and then the vacuum pump draws in an air volume equal to that of the object being weighed into the cavity; at this time, due to the increase in weight of the balance block 17, the balance block 17 moves downward, while the slider 14 at the other end of the balance rod 9 moves in the opposite direction along the limiting groove 15, thereby adjusting the length of the resistance wire rod 13 in the intervention circuit. At this time, the current flowing through the electromagnet 10 increases, the magnetism of the electromagnet 10 increases, and the two electromagnets 10 attract each other, causing the pressure sensor at the bottom of the weighing pan 2 to sense an increased force, which is the same as the buoyancy force on the object being weighed.

[0037] 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. A compensating device for weighing equipment, characterized in that, include: The housing is provided with a weighing pan and a windproof cover, and the weighing pan is disposed in the windproof cover; An adjustment assembly, comprising an identification mechanism and a partitioning mechanism, wherein the identification mechanism is disposed on the windproof cover and is used to identify the volume and height of the object to be weighed, and the partitioning mechanism is used to partition the space of the windproof cover according to the height measured by the identification mechanism; and A balancing assembly is disposed in the housing. The balancing assembly includes a balance bar, an electromagnetic mechanism, and an air extraction mechanism. The electromagnetic mechanism and the air extraction mechanism are respectively disposed on both sides of the balance bar. The electromagnetic mechanism is disposed at the bottom of the weighing pan. The electromagnetic mechanism is used to balance the force on the weighing pan by electromagnetic adsorption. The air extraction mechanism is used to extract outside air and adjust the amount of electricity supplied to the electromagnetic mechanism by the gravity of the air. The housing has an inner cavity, the balancing component is disposed in the inner cavity, the inner cavity is connected to an air hole, and the air hole is connected to the side wall of the housing; The inner cavity sidewall is provided with a limiting groove. The electromagnetic mechanism includes an electromagnet, a first wire, a second wire, a resistance wire rod, and a slider. The electromagnet is located below the weighing pan. The two ends of the electromagnet are respectively connected to the first wire and the second wire. The first wire is used to connect the resistance wire rod and the electromagnet, and the second wire is used to connect the slider and the electromagnet. The slider is connected to the limiting groove. The inner cavity is provided with a support block, the balance bar is connected to the support block, and the slider is connected to one end of the balance bar; The air extraction mechanism includes a balance block, a one-way valve, an air pump, and a conduit. The balance block is connected to one end of the balance rod, and a cavity is opened inside the balance block. The one-way valve is connected to the cavity, and the air pump is disposed in the cavity. The two ends of the air pump are connected to the air hole and the one-way valve respectively through conduits.

2. The weighing equipment compensation device according to claim 1, characterized in that: The identification mechanism is a 3D scanner, which is arranged around the inner wall of the windproof cover. The images acquired by the 3D scanner are used to calculate the height and volume of the object to be weighed.

3. The weighing equipment compensation device according to claim 1, characterized in that: The separating mechanism includes a partition guide rail, a push rod, and a partition. The partition guide rail is disposed on the side wall of the windproof cover. The two ends of the push rod are respectively connected to the partition guide rail and the partition. The push rod is used to control the partition to reach above the weighing object.

4. A weighing equipment compensation device according to claim 3, characterized in that: The partition guide rails are provided in four sets, and the four sets of partitions are arranged around the windproof cover. The push rods are provided in four sets corresponding to the partition guide rails.

5. A weighing equipment compensation device according to claim 1, characterized in that: The bottom of the weighing pan is also equipped with an electromagnet, and the two electromagnets have the same magnetic poles facing each other.

6. An ultra-micro weighing system, characterized in that: The ultra-micro weighing system includes the weighing equipment compensation device of any one of claims 1-5.

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