Weighing device with potential balancer
By integrating a potential balancer in the weighing device, the ion neutralization of static electricity generated by collision of α particles with air molecules is solved, and the error problem of microbalances is solved when weighing insulated objects in an electrostatic environment is achieved, achieving high-precision and safe weighing.
Patent Information
- Application Number
- CN202422371615.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-26
AI Technical Summary
Existing microbalances are susceptible to electrostatic interference when weighing insulated objects, resulting in weighing errors, especially the electrostatic charges on the filter membrane cannot be freely migrated, affecting the weighing accuracy.
A weighing device with a potential balancer is adopted. By setting a potential balancer around the weighing pan, the collision between α particles and air molecules is used to generate oxygen ions and nitrogen ions, neutralize the static charge on the object to be measured and eliminate the static influence.
It effectively eliminates the impact of electrostatic versus weighing results, improves weighing accuracy and safety, ensures the stability and precision of measurement, and complies with the HJ656-2013 standard.
Smart Images
Figure CN223138785U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of metrological detection, and particularly relates to a weighing device with a potential balancer. Background Art
[0002] The weighing of particulate sampling filter membranes has always been troubled by problems in the weighing environment, such as humidity, temperature, air flow, buoyancy, vibration, and static charges on the filter membrane, etc. Among them, the static charges on the filter membrane are the most difficult to handle and are often ignored. The reasons for the generation of static electricity include contact, friction, separation, and inductive charging, etc., so static electricity is everywhere.
[0003] A microbalance is a very precise instrument that can be used to weigh very small samples with high precision. In scientific research and laboratories, it has been widely used in precise chemical analysis, drug research, biological experiments, etc. A microbalance can measure extremely small amounts of substances to ensure the accuracy and reliability of experimental results.
[0004] However, when the existing microbalances are in use, they are easily interfered by static electricity and cause weighing errors. Especially when the object to be measured is an insulator, for example, when the object to be measured is a polytetrafluoroethylene (Teflon) filter membrane, since it is an insulator, the electrons on the filter membrane cannot migrate freely, so electrons cannot be supplemented or absorbed through the ground. It is necessary to ionize air molecules. The ionized air has positive and negative polarities. Through the characteristic of mutual attraction of opposite static polarities, the number of electrons and protons on the filter membrane is made the same (charge neutralization), and an electrically neutral and stable state (0V) is maintained. Summary of the Utility Model
[0005] In view of the above deficiencies of the prior art, the utility model provides a weighing device with a potential balancer, which solves the problem that the existing weighing device is easily interfered by static electricity and causes weighing errors when weighing insulating objects.
[0006] To achieve the above object, the technical solution adopted by the utility model is as follows:
[0007] Provide a weighing device with a potential balancer, including a weighing device body, a display is arranged above the weighing device body, a fixed seat is arranged on one side of it, a weighing pan is arranged on the fixed seat, a weight measuring induction unit is arranged below the weighing pan, and a potential balancer is arranged around the weighing pan.
[0008] The beneficial effects of adopting the above technical solution: The fixed seat on one side of the weighing device body can be used as a support platform for the weighing pan, which can reduce the influence of vibration or shaking on the weighing result. The weighing pan is used to place the object to be measured, and the weight measuring induction unit accurately measures the weight of the object to be measured by sensing the change in pressure received by the weighing pan.
[0009] When it is necessary to measure the weight of the object to be measured, the object to be measured can be placed on the weighing pan. At this time, the radiation source of the potential balancer can generate ions in the environment. These ions can adsorb ions with opposite charges, thereby achieving potential balance and static charge neutralization, and achieving the purpose of eliminating static electricity. When a charged insulator (such as a filter membrane) approaches a conductor (weighing pan), induced charging will occur inside the weighing pan, and the surface of the weighing pan will show a charged phenomenon. According to Coulomb's force, the potential caused by electrostatic induction and the static electricity carried by the filter membrane will generate a suction force, resulting in an increase in the weighed mass of the filter membrane and affecting the weighing precision. At this time, the static electricity removal time can be extended. The static electricity removal time needs to be greater than 60 seconds, and the static electricity value of the filter membrane needs to be less than ±20V before the balance weighing can be carried out to improve the reference of the weighing result of the particulate matter sampling filter membrane. After the static electricity is eliminated, the weighing unit senses the pressure of the object to be measured, and the weighing sensing unit can transmit a sensing signal and display the sensed weight through a display.
[0010] By integrating with a potential balancer, the weighing device can effectively eliminate the static charge on the object to be measured through the particles generated by the collision of α particles with air molecules during the weighing process, prevent the influence of static electricity on the weighing result, and effectively solve the problem of errors that are prone to occur in the weighing device in a static electricity environment, greatly improving the weighing accuracy of the weighing device.
[0011] Furthermore, the potential balancer includes a base and a radiation source. At least one radiation source is provided and is arranged on the base.
[0012] The beneficial effects of adopting the above technical solution are as follows: The base serves as a carrier for the radiation source and has the effect of conducting to the ground, capable of stably carrying and fixing the radiation source, ensuring that the radiation source will not shift or fall off during use, guaranteeing the stability and reliability of the potential balancer. Moreover, the radiation sources are arranged at intervals on the base and surround the weighing pan, capable of emitting α particles to the object to be measured in multiple directions. After the α particles collide with air molecules, sufficient oxygen ions and nitrogen ions are generated to neutralize the positive and negative static charges to zero volts, thereby effectively eliminating static electricity. The radiation distance of the radiation is extremely short (about 30mm) and the energy is relatively low, having little impact on the human body and the environment, effectively improving the use safety.
[0013] Furthermore, the base includes a fixed bottom plate and a pressing plate arranged above the fixed bottom plate. A number of accommodating grooves are provided on the fixed bottom plate, and radiation sources are arranged in the number of accommodating grooves.
[0014] The beneficial effects of adopting the above technical solution are as follows: The fixed bottom plate has a predetermined thickness and can be used to carry the radiation source. The radiation source is placed in the accommodating groove, enabling the radiation source to be stably installed on the fixed bottom plate and being pressed by the pressing plate, which can not only achieve the purpose of eliminating static electricity in multiple directions and improving the static electricity elimination effect, but also ensure the overall stability and safety of the device.
[0015] Further, the thickness of the fixed base plate is greater than that of the pressing plate.
[0016] The beneficial effects of adopting the above technical solution are as follows: When the thickness of the fixed base plate is greater than that of the pressing plate, a part of the radiation source can be exposed from the pressing plate, which can prevent the pressing plate from interfering with the emission of α particles and ensure the efficiency of static electricity elimination.
[0017] Further, both the fixed base plate and the pressing plate are made of metal materials.
[0018] The beneficial effects of adopting the above technical solution are as follows: The fixed base plate and the pressing plate made of metal materials are excellent conductors, which can quickly conduct static charges to the ground, effectively prevent static electricity accumulation, and are beneficial to improving the static electricity elimination effect.
[0019] Further, the fixed base plate and the pressing plate are connected by screws.
[0020] The beneficial effects of adopting the above technical solution are as follows: The fixed base plate and the pressing plate connected by multiple screws are firmly combined, which is beneficial to the stable setting of the radiation source on the base, effectively improves the connection stability, and can be set at a higher level by using these screws, so that the potential balancer can be located at an appropriate horizontal height, enabling these radiation sources to be close to the weighing pan and having a better static electricity elimination effect.
[0021] Further, a gap is provided between the weighing pan and the base.
[0022] The beneficial effects of adopting the above technical solution are as follows: By providing a gap between the weighing pan and the base, the potential balancer will not interfere with the operation of the weighing pan; and the gap can keep a certain distance between the weighing pan and the base, reducing the electromagnetic interference or vibration that the base may generate and affecting the weighing accuracy of the weighing pan.
[0023] Further, the base and the weighing pan are concentrically arranged.
[0024] The beneficial effects of adopting the above technical solution are as follows: By making the base and the weighing pan concentrically arranged, the radiation sources can be evenly distributed around the weighing pan and surround the weighing pan 360°, effectively improving the static electricity elimination effect and the measurement accuracy.
[0025] Further, a weighing pan wind shield is provided outside the weighing pan.
[0026] The beneficial effects of adopting the above technical solution are as follows: The weighing pan wind shield can isolate the external air flow, ensure that the weighing process is not interfered by the air flow, and can maintain the relative stability inside the wind shield, reduce the changes of factors such as humidity and temperature, and ensure the measurement stability during the weighing process.
[0027] In summary, the weighing device with a potential balancer provided by the present utility model has the following beneficial effects:
[0028] (1) By integrating the weighing device with a potential balancer, the potential balancer can generate sufficient oxygen ions and nitrogen ions through the collision of α particles emitted by radioactive elements with air molecules during the weighing process, neutralize positive and negative static charges to zero, effectively eliminate the static charges on the object to be measured, prevent the influence of static electricity on the weighing result, and effectively solve the problem of errors that are prone to occur in the weighing device in a static environment, greatly improving the weighing accuracy of the weighing device.
[0029] (2) The potential balancer in the present utility model uses radiation sources arranged at intervals to emit α particles in multiple directions to collide with air molecules to generate ions, thereby effectively eliminating the static charges on the object to be measured. Moreover, the radiation distance of the radiation source is extremely short and the energy is low, with little impact on the human body and the environment, ensuring the use safety.
[0030] (3) A gap is provided between the weighing pan and the base in the present utility model, which can prevent the potential balancer from interfering with the operation of the weighing pan; and the gap can keep a certain distance between the weighing pan and the base, reducing the electromagnetic interference or vibration that may be generated by the base and affecting the weighing accuracy of the weighing pan.
[0031] (4) A weighing pan wind shield is arranged outside the weighing pan in the present utility model, which can isolate external airflows, ensure that the weighing process is not interfered by airflows, and can maintain the relative stability inside the wind shield, reducing the changes of factors such as humidity and temperature, ensuring the measurement stability during the weighing process. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 is a schematic structural diagram of the present utility model;
[0033] Figure 2 is a schematic structural diagram of the potential balancer in the present utility model;
[0034] Figure 3 is Figure 2 the sectional view taken along line III-III in
[0035] Figure 4 is Figure 3 the schematic view of part IV of
[0036] Figure 5 is a schematic diagram of the use state of the potential balancer in the present utility model;
[0037] Wherein; 1, weighing device body; 11, fixed seat; 2, weighing pan; 3, weighing induction unit; 4, potential balancer; 41, base; 411, fixed bottom plate; 412, pressing plate; 413, accommodating groove; 414, screw; 42, radiation source; 5, display; 6, weighing pan wind shield; 7, gap. Detailed implementation manners
[0038] The following describes the detailed implementation manners of the present utility model to facilitate those skilled in the art of this technical field to understand the present utility model. However, it should be clear that the present utility model is not limited to the scope of the detailed implementation manners. For those of ordinary skill in the art of this technical field, as long as various changes are within the spirit and scope of the present utility model defined and determined by the appended claims, these changes are obvious, and all utility models created using the concept of the present utility model are within the scope of protection.
[0039] As Figures 1 to 5 shown, the weighing device with a potential balancer 4 provided by the present utility model includes a weighing device body 1. A display 5 is arranged above the weighing device body 1, and a fixed seat 11 is arranged on one side thereof. A weighing pan 2 is arranged on the fixed seat 11. A weight measuring induction unit 3 is arranged below the weighing pan 2, and a potential balancer 4 is arranged around the weighing pan 2.
[0040] The fixed seat 11 on one side of the weighing device body 1 can serve as a support platform for the weighing pan 2, which can reduce the influence of vibration or shaking on the weighing result. The weighing pan 2 is used to place the object to be measured, and the weighing pan 2 is a conductor made of metal material. The weight measuring induction unit 3 can be a weighing sensor, which is arranged in the fixed seat 11 and is connected to the weighing pan 2 through a linkage mechanism such as a gear. The weight measuring induction unit 3 can accurately measure the weight of the object to be measured by sensing the pressure change received by the weighing pan 2.
[0041] When it is necessary to measure the weight of the object to be measured, the object to be measured can be placed on the weighing pan 2. Then, the radiation elements in the radiation source 42 of the potential balancer 4 can generate ions in the environment. These ions can adsorb ions with opposite charges, thereby achieving potential balance and static charge neutralization, and thus achieving the purpose of eliminating static electricity. When a charged insulator (such as a filter membrane) approaches a conductor (the weighing pan 2), induced charging will occur inside the weighing pan 2, and the surface of the weighing pan 2 will show a charged phenomenon. According to Coulomb's force, the potential caused by electrostatic induction and the static electricity carried by the filter membrane will generate an attractive force, resulting in an increase in the weighing mass of the filter membrane and affecting the weighing precision. The static electricity removal time needs to be extended. The static electricity removal time needs to be greater than 60 seconds, and the static electricity value of the filter membrane needs to be less than ±20V before the balance weighing can be carried out to improve the reference of the weighing result of the particulate matter sampling filter membrane. After the static electricity is eliminated, the weight measuring induction unit 3 senses the pressure of the object to be measured and transmits a sensing signal, and the sensed weight is displayed through the display 5.
[0042] As Figure 1 shown, a weighing pan wind shield 6 is arranged outside the pan. The weighing pan wind shield 6 can isolate the external air flow, ensure that the weighing process is not interfered by the air flow, and can maintain the relative stability inside the wind shield, reduce the changes of factors such as humidity and temperature, and ensure the measurement stability during the weighing process.
[0043] As Figure 2 shown, the potential balancer 4 is arranged around the weighing pan 2, and the top side of the weighing pan 2 protrudes from the top side of the potential balancer 4. The potential balancer 4 includes a base 41 and a radiation source 42. At least one radiation source 42 is arranged on the base 41. The base 41 can be circular or other shapes. In use, the base 41 serves as a carrier for the radiation source 42 and has the effect of conducting and grounding, which can stably carry and fix the radiation source 42, ensuring that the radiation source 42 will not shift or fall off during use, guaranteeing the stability and reliability of the potential balancer 4. The radiation sources 42 are arranged at intervals on the base 41 and surround the weighing pan 2. One or more radiation sources 42 can be arranged, but it is best not to exceed twelve at most. The radiation source 42 contains radioactive elements, such as polonium (Po-210), which can emit α particles (positively charged helium atoms), collide with air molecules, generate sufficient oxygen ions and nitrogen ions, enough to neutralize positive and negative static charges to zero volts without generating ozone. When they provide the neutralization ability to eliminate static electricity, these ions recombine with each other again and become normal air. Preferably, the time to remove static electricity is at least 60 seconds. The α radiation contains helium-4 atomic nuclei, and the radiation distance is short, about 30 mm, which can be blocked by a piece of paper. It is relatively safe compared to other rays and has low energy, with little impact on the human body and the environment, effectively improving the use safety.
[0044] In this embodiment, the base 41 and the weighing pan 2 are concentrically arranged. By making the base 41 and the weighing pan 2 concentrically arranged, the radiation sources 42 can be evenly distributed around the weighing pan 2 and surround the weighing pan 2 in a 360° manner, effectively improving the static electricity elimination effect and the measurement accuracy.
[0045] As Figures 2 to 4 shown, the base 41 includes a fixed bottom plate 411 and a pressing plate 412 arranged above the fixed bottom plate 411. A number of accommodating grooves 413 are arranged on the fixed bottom plate 411, and the radiation sources 42 are arranged in the number of accommodating grooves 413. The fixed bottom plate 411 has a predetermined thickness and can be used to carry the radiation source 42. The radiation source 42 is placed in the accommodating groove 413, so that the radiation source 42 is stably installed on the fixed bottom plate 411 and is pressed by the pressing plate 412, which can not only achieve the purpose of eliminating static electricity in multiple directions and improving the static electricity elimination effect, but also ensure the overall stability and safety of the device.
[0046] In this embodiment, the thickness of the fixed bottom plate 411 is greater than the thickness of the pressing plate 412. When the thickness of the fixed bottom plate 411 is greater than the thickness of the pressing plate 412, a part of the radiation source 42 can be exposed from the pressing plate 412, which can ensure that the pressing plate 412 does not interfere with the emission of α particles and ensure the efficiency of static electricity elimination.
[0047] Moreover, the fixed base plate 411 and the pressing plate 412 are connected by screws 414. The fixed base plate 411 and the pressing plate 412 connected by multiple screws 414 are firmly combined with each other, which is beneficial to stably arranging the radiation source 42 on the base 41, effectively improving the connection stability. And these screws 414 can be used for elevated setting, so that the potential balancer 4 can be located at an appropriate horizontal height, enabling these radiation sources 42 to be close to the weighing pan 2, and thus having a better static electricity elimination effect. In addition, both the fixed base plate 411 and the pressing plate 412 are made of metal materials. The fixed base plate 411 and the pressing plate 412 made of metal materials are excellent conductors, which can quickly conduct static charges to the ground, effectively preventing static charge accumulation and being beneficial to improving the static electricity elimination effect.
[0048] As Figure 1 and Figure 5 shown, when the object to be measured is placed on the weighing pan 22 for weight measurement, the radiation source 4242 of the potential balancer 44 can generate α particles in the environment, collide with air molecules to form sufficient oxygen ions and nitrogen ions. When the weighing pan wind shield 66 is opened and closed, it will cause air flow disturbance, and the positive and negative ions will migrate accordingly. During the weighing process, the positive and negative static charges on the filter membrane can be neutralized. After testing, the filter membrane can remove all static electricity on it by 100% after 60 seconds of static electricity removal after sampling. After the filter membrane is removed of static electricity after sampling, it can meet the HJ656-2013 standard, and the mass difference between two weighings of the same filter membrane is within 40 ug.
[0049] In summary, the weighing device with a potential balancer 4 provided by the present utility model is integrated with the potential balancer 4. The potential balancer 4 can generate sufficient oxygen ions and nitrogen ions through the collision of radioactive elements emitting α particles with air molecules during the weighing process, and can neutralize the positive and negative static charges to zero state, effectively eliminating the static charges on the object to be measured and preventing the influence of static electricity on the weighing result, effectively solving the problem of errors that easily occur in the weighing device in a static electricity environment and greatly improving the weighing accuracy of the weighing device.
Claims
1. A weighing device with a potential balancer, characterized in that: It includes a weighing device body (1), above which a display (5) is provided, and on one side of which a fixing base (11) is provided. A weighing pan (2) is provided on the fixing base (11), a weight measuring induction unit (3) is provided below the weighing pan (2), and a potential balancer (4) is provided around the weighing pan (2).
2. The weighing device with a potential balancer according to claim 1, characterized in that: The potential balancer (4) includes a base (41) and a radiation source (42). At least one radiation source (42) is provided and is arranged on the base (41).
3. The weighing device with a potential balancer according to claim 2, characterized in that: The base (41) includes a fixed bottom plate (411) and a pressing plate (412) arranged above the fixed bottom plate (411). A number of accommodating grooves (413) are provided on the fixed bottom plate (411), and the radiation source (42) is arranged in a number of the accommodating grooves (413).
4. The weighing device with a potential balancer according to claim 3, characterized in that: The thickness of the fixed bottom plate (411) is greater than that of the pressing plate (412).
5. The weighing device with a potential balancer according to claim 4, characterized in that: Both the fixed bottom plate (411) and the pressing plate (412) are made of metal materials.
6. The weighing device with a potential balancer according to claim 5, characterized in that: The fixed bottom plate (411) and the pressing plate (412) are connected by screws (414).
7. The weighing device with a potential balancer according to claim 1, characterized in that: A gap (7) is provided between the weighing pan (2) and the base (41).
8. The weighing device with a potential balancer according to claim 2, characterized in that: The base (41) and the weighing pan (2) are arranged concentrically.
9. The weighing device with a potential balancer according to claim 1, characterized in that: A weighing pan wind shield (6) is provided outside the weighing pan (2).