CN113532600A - Electromagnetic force balance load cell - Google Patents
Electromagnetic force balance load cell Download PDFInfo
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- CN113532600A CN113532600A CN202110992650.9A CN202110992650A CN113532600A CN 113532600 A CN113532600 A CN 113532600A CN 202110992650 A CN202110992650 A CN 202110992650A CN 113532600 A CN113532600 A CN 113532600A
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- 238000005303 weighing Methods 0.000 claims abstract description 63
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 11
- 230000007547 defect Effects 0.000 description 5
- 210000003205 muscle Anatomy 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000036632 reaction speed Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 2
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G7/00—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups
- G01G7/02—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups by electromagnetic action
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
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Abstract
本发明公开的电磁力平衡称重传感器，它包括支架，其特征在于：横梁的短侧端通过支点簧片与所述支架的左侧端面连接安装，上定位架的右侧端通过上右单筋簧片装在所述支架上表面上，所述下定位架的右侧端通过下右单筋簧片装在所述支架的底部，所述上定位架的左侧端和下定位架的左侧端利用相对应的上左单筋簧片和下左单筋簧片连接称重立柱对应的上端面和下端面，长吊簧片一端装在所述横梁短侧端的外表面上，另一端装在所述称重立柱上，长吊簧片与所述横梁短侧端的外表面之间装有力矩调节垫块用以调节负载力矩。提高了称重单元传感器传递到显示位置的反应速度，扩大了称重天平的称量范围，简化了称重天平的结构，降低了加工和组装难度。
The electromagnetic force balance load cell disclosed by the invention comprises a bracket, and is characterized in that: the short side end of the beam is connected and installed with the left end face of the bracket through the fulcrum spring, and the right end of the upper positioning frame is connected to the left end face of the bracket through the upper right single The rib spring is installed on the upper surface of the bracket, the right end of the lower positioning frame is installed on the bottom of the bracket through the lower right single rib spring, the left end of the upper positioning frame and the bottom of the lower positioning frame. The left end uses the corresponding upper left single rib reed and lower left single rib reed to connect the corresponding upper end face and lower end face of the weighing column, one end of the long hanging reed is mounted on the outer surface of the short side end of the beam, and the other One end is installed on the weighing column, and a moment adjusting pad is installed between the long hanging spring and the outer surface of the short side end of the beam to adjust the load moment. The response speed of the sensor of the weighing unit transmitted to the display position is improved, the weighing range of the weighing balance is enlarged, the structure of the weighing balance is simplified, and the difficulty of processing and assembly is reduced.
Description
Technical Field
The invention belongs to the technical field of precision instruments and equipment, and particularly relates to an electromagnetic force balance weighing sensor.
Background
The balance is a weighing apparatus manufactured by utilizing a lever principle, can realize weighing of extremely precise weight of a substance by utilizing an electromagnetic force amplification function in the field of precise weighing of the substance, and can generally measure a weighing load of 100 g with a measurement resolution of 0.01 mg, namely, the precision is one million.
Chinese patent 201210564331.9 discloses a weighing cell based on the principle of electromagnetic force compensation, which comprises a fixed base part and a permanent magnet system mounted on the base part. The suspension coil is connected to the load receiver by a force transmission mechanism and conducts a compensation current. Also included is an electro-optical position sensor whose sensor signal corresponds to the deflection of the coil from the null position. The closed-loop controller controls the compensation current in such a way that the coil and the load receiver connected to the coil are returned to their zero positions by the effect of the electromagnetic forces acting between the coil and the permanent magnet system. The optoelectronic position sensor includes a light emitter and a light receiver with a void space therebetween, and further includes a light shield. The light emitter is mounted on the first bearing element; and/or the optical receiver is mounted on the second carrier element. The weighing unit reduces the interference of the environment factor symmetrical re-sensing process by utilizing electromagnetic force and photoelectric effect, improves the measurement precision of the weighing balance, but the weighing unit transmits the substance to the display position through the sensor after the substance is placed in the balance, has slower reaction speed, and leads to the fixed weighing range of the weighing balance because the moment of the lever of the sensor part of the weighing balance is fixed and unchangeable, thereby reducing the application range of the weighing balance.
Disclosure of Invention
The invention aims to overcome the defect that the reaction speed is low when a substance is transferred to a display position through a sensor after the substance is placed on a balance by the conventional weighing unit, and provides the electromagnetic force balance weighing sensor, so that the reaction speed of the substance transferred to the display position through the sensor after the substance is placed on the balance by the weighing unit is improved, the weighing precision is further improved, the moment of a lever of the sensor part of the weighing balance is set to be adjustable, the weighing range of the weighing balance is expanded, the structure of the weighing balance is further simplified, and the processing and assembling difficulty is reduced.
Technical scheme
In order to achieve the above technical object, the present invention provides an electromagnetic force balance weighing sensor, which comprises a bracket, a beam disposed in a beam mounting groove of the bracket, a coil assembly mounted on a lower surface of a long side end of the beam, a cylinder fixedly mounted in a cylinder mounting groove of the bracket, the coil assembly disposed in the cylinder, wherein: the short side end of crossbeam pass through the fulcrum reed with the installation is connected to the left side end surface of support, and the right side end of going up the locating rack is in through last right single muscle reed dress be located on the support upper surface the crossbeam top, the right side end of locating rack is in through lower right single muscle reed dress the bottom of support, the left side end of going up the locating rack and the left side end of locating rack utilize corresponding last left single muscle reed and lower left single muscle reed to connect the up end and the lower terminal surface that the stand corresponds of weighing, and long hanging reed one end dress is in on the surface of crossbeam short side, the other end dress is in on the stand of weighing, long hanging the reed with the moment adjustment cushion is equipped with between the surface of crossbeam short side and is used for adjusting load moment.
Further, the coil assembly is in the form of a tubular ring.
Further, a weight is mounted on an upper surface of the long side end of the beam to correspond to the coil block.
Further, the counterweight block and the upper surface of the long side end of the cross beam are in a through hole shape corresponding to the coil assembly.
Furthermore, the beam is provided with a wire accommodating groove capable of accommodating the coil connecting wire.
Furthermore, a process cantilever is arranged on the support, and a process connecting part is arranged at the cantilever end of the process cantilever and connected with the support body.
Furthermore, the cantilever end of the process cantilever is connected with the bracket body by a screw.
Further, a position measurement control cliche is mounted on the right surface of the support corresponding to the coil block.
Further, a cylinder cover is fixedly mounted on the cylinder.
Furthermore, the long side end of the cross beam is provided with an induction gap corresponding to the position measurement control printing plate.
Furthermore, the cross beam is 7-shaped, the head part is a short side end, the tail part is a long side end, the short side end of the cross beam is positioned outside the left end of the support, one end of the fulcrum reed is arranged on the outer surface of the short side end of the cross beam through a first screw, and the other end of the fulcrum reed is arranged on the end surface of the left side of the support through a second screw.
Furthermore, two ends of the upper right single-rib reed, the lower right single-rib reed, the upper left single-rib reed and the lower left single-rib reed are respectively arranged on the corresponding support and the corresponding weighing upright column by screws.
Furthermore, one end of the long hanging reed, which is positioned in a connecting groove hole on the weighing upright post, is arranged on the outer surface of the short side end of the cross beam by a screw four, and the other end of the long hanging reed is arranged on the weighing upright post by a screw five.
Further, a tilt adjuster is mounted inside the cross member for adjusting the balance of the cross member.
Advantageous effects
The electromagnetic force balance weighing sensor provided by the invention has the advantages that firstly, the electromagnetic coil component is improved into a tubular ring type, the defect that the electromagnetic coil in the prior art is closed, when the electromagnetic force sensor works, the cross beam vibrates in a magnetic field at a frequency of several kilohertz times to act, and the defect that the electromagnetic coil component can cut magnetic lines of force to move only after air resistance and pressure of an air gap inside a magnetic cylinder are overcome is overcome; secondly, the wires are directly arranged in the wire accommodating grooves in the cross beam, so that the structure of the weighing balance is simplified, and the assembly difficulty is reduced; thirdly, the moment of a lever of a sensor part of the weighing balance is set to be adjustable, the weighing range of the weighing balance is expanded, and finally, the cantilever end of the cantilever frame on the support is connected by a screw rod instead of being directly milled, so that the stress deformation of the cantilever end is avoided, and the precision of a product is improved.
Drawings
FIG. 1a is a perspective view of an embodiment of the present invention.
FIG. 1b is a top view of an embodiment of the present invention.
FIG. 1c is a sectional view taken along line B-B of FIG. 1B.
FIG. 1d is a cross-sectional view taken along line C-C of FIG. 1 b.
Fig. 2 is an assembly view of an embodiment of the present invention.
Fig. 3 is an exploded view of an embodiment of the present invention.
Fig. 4a is a product drawing of a stent in an embodiment of the present invention.
Fig. 4b is a front view of a bracket in an embodiment of the invention.
FIG. 4c is a top view of a stent in an embodiment of the present invention.
Fig. 5a is a product view of a cross member in an embodiment of the present invention.
FIG. 5b is a front view of a cross-beam in an embodiment of the present invention.
FIG. 5c is a top view of a cross-beam in an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "inner", "outer", "front", "rear", "left", "right", "general side", "spare side", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Examples
As shown in fig. 1a, 1b, 1c, 1d, 2 and 3, the electromagnetic force balance weighing sensor comprises a bracket 1, a beam 2 disposed in a beam mounting groove 101 of the bracket 1, a coil assembly 3 mounted on a lower surface of a long side end of the beam 2, a magnetic cylinder 4 fixedly mounted in a cylinder mounting groove 102 of the bracket 1, the coil assembly 3 disposed in the magnetic cylinder 4, and a cylinder cover 5 fixedly mounted on the magnetic cylinder 4. A position measurement control cliche 6 is mounted on the right surface of the support 1 corresponding to the coil block 3. As shown in fig. 5a, 5b and 5c, the long side end of the cross beam 2 is provided with a sensing notch 201 corresponding to the position measurement control printing plate 6.
The short side end of the cross beam 2 is connected and installed with the left side end face of the bracket 1 shown in fig. 4a, 4b and 4c through a supporting point reed 7, the right side end of the upper positioning frame 8 is installed on the surface of the bracket 1 above the cross beam 2 through an upper right single-rib reed 9, the right side end of the lower positioning frame 10 is installed at the bottom of the bracket 1 through a lower right single-rib reed 11, the left side end of the upper positioning frame 8 and the left side end of the lower positioning frame 10 are connected with the corresponding upper end face and lower end face of the weighing upright post 14 through a corresponding upper left single-rib reed 12 and a lower left single-rib reed 13, one end of a long hanging spring piece 15 is installed on the outer surface of the short side end of the cross beam 2, the other end is installed on the weighing upright post 14, a moment adjusting cushion block 16 is installed between the long hanging spring piece 15 and the outer surface of the short side end of the cross beam 2 for adjusting the load moment, thus the moment of the lever of the weighing sensor part is set to be adjustable, the weighing range of the weighing balance is expanded, and the inclined load regulator 16a is arranged on the inner side of the cross beam 2 and can be used for regulating the horizontal balance of the cross beam when the horizontal direction of the cross beam 2 is not completely horizontal.
As further shown in fig. 5a, 5b and 5c, in this embodiment, the cross beam 2 is 7-shaped, the head is a short side end, and the tail is a long side end, the short side end of the cross beam 2 is located outside the left end of the bracket 1, one end of the fulcrum spring 7 is mounted on the outer surface of the short side end of the cross beam 2 by a first screw 17, and the other end is mounted on the left side end of the bracket 1 by a second screw 18. And two ends of the upper right single-rib reed 9, the lower right single-rib reed 11, the upper left single-rib reed 12 and the lower left single-rib reed 13 are respectively arranged on the corresponding bracket 1 and the weighing upright post 14 by screws three 19. The long suspension spring 15 is located in the connecting slot 1401 of the weighing column 14, one end of the long suspension spring is mounted on the outer surface of the short side end of the cross beam 2 by a screw four 20, and the other end of the long suspension spring is mounted on the weighing column 14 by a screw five 21.
In the prior art, when the requirement on measurement accuracy is not high, the coil assembly is closed, when an electromagnetic force sensor works, the beam 2 vibrates in a magnetic field at a frequency of kilohertz, the beam acts to cut magnetic lines of force to move after overcoming the air resistance of the coil assembly 3 and the pressure of an air gap inside the magnetic cylinder 4, and in the technical scheme, the coil assembly 3 is tubular ring-shaped, so that the sensor directly cuts the magnetic lines of force after acting, thereby reducing airflow disturbance and resistance, improving the response speed of a weighing unit for placing a substance in the sensor and enabling the beam to reach dynamic balance in the magnetic field, reducing measurement errors and further improving the weighing accuracy; meanwhile, in order to increase the measuring range, a weight 22 is installed on the upper surface of the long side end of the beam 2 corresponding to the coil block 3. The counterweight 22 and the upper surface of the long side end of the cross beam 2 are in a through hole shape corresponding to the coil assembly 3. On the other hand be equipped with wire holding tank 202 on crossbeam 2 and can hold the coil connecting wire, the coil connecting wire has simplified the structure of weighing balance in the wire holding tank 202 of crossbeam 2 is directly arranged, has reduced the equipment degree of difficulty.
As shown in fig. 4a, 4b and 4c, in this embodiment, the bracket 1 is provided with a process cantilever 103, and a cantilever end 103a of the process cantilever 103 is provided with a process connection portion 103a01 connected to the body of the bracket 1. The process connection 103a01 is only knocked off until the final assembly of the rack 1 during the manufacturing process, as shown in fig. 3. The cantilever end 103a of the cantilever 103 is connected with the bracket 1 body by the screw 23, and in the structure, the cantilever end 103a of the cantilever bracket on the bracket 1 is connected by the screw 23 instead of being directly milled, so that the stress deformation of the cantilever end 103a during processing is avoided, and the product precision is improved.
The working process of the embodiment is as follows: the weighing upright post 14 is connected to the short side end of the cross beam 2 through a long hanging reed 15, the cross beam 2 is hung on the bracket 1 through two fulcrum reeds 7, the coil assembly 3 is arranged at the long side end of the cross beam 2, and the coil assembly 3 is suspended in the magnetic cylinder 4 through electromagnetic force. When a substance to be measured is placed on the weighing upright post 14, gravity is transmitted to the short side end of the cross beam 2 through the long hanging reed 15 to drive the cross beam 2 to do lever motion around the fulcrum reed 7, a coil assembly arranged at the long side end of the cross beam 2 moves upwards in a magnetic field, a position detection device arranged in a position measurement control printing plate 6 on the support 1 measures the upward movement amount of the cross beam 2, a regulator of the position measurement control printing plate 6 increases the current in the coil, so that the energized coil increases the downward electromagnetic force in the magnetic field, the cross beam achieves dynamic balance through a PID regulator, and the weight of the substance to be measured can be obtained by measuring the current in the coil.
According to the electromagnetic force balance weighing sensor provided by the embodiment of the invention, firstly, the electromagnetic coil assembly is improved into a tubular ring type, so that the defect that the electromagnetic coil in the prior art is closed, when the electromagnetic force sensor works, the cross beam vibrates in a magnetic field at a frequency of several kilohertz times, and the defect that the electromagnetic coil assembly can cut magnetic lines of force to move only after air resistance and pressure of an air gap inside a magnetic cylinder are overcome is overcome; secondly, the wires are directly arranged in the wire accommodating grooves in the cross beam, so that the structure of the weighing balance is simplified, and the assembly difficulty is reduced; thirdly, the moment of a lever of a sensor part of the weighing balance is set to be adjustable, the weighing range of the weighing balance is expanded, and finally, the cantilever end of the cantilever frame on the support is connected by a screw rod instead of being directly milled, so that the stress deformation of the cantilever end is avoided, and the precision of a product is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (14)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110992650.9A CN113532600A (en) | 2021-08-27 | 2021-08-27 | Electromagnetic force balance load cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110992650.9A CN113532600A (en) | 2021-08-27 | 2021-08-27 | Electromagnetic force balance load cell |
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| CN113532600A true CN113532600A (en) | 2021-10-22 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130161103A1 (en) * | 2011-12-22 | 2013-06-27 | Mettler-Toledo Ag | Weighing cell based on the principle of electromagnetic force compensation with optoelectronic position sensor |
| CN203551054U (en) * | 2013-11-13 | 2014-04-16 | 余姚市新竹智控技术有限公司 | Integrated elastomer of high-precision electromagnetic force balancing type weighing sensor |
| CN104374454A (en) * | 2014-11-14 | 2015-02-25 | 天津大学 | High-precision electronic balance measuring system based on single sensor |
| CN205236454U (en) * | 2015-12-25 | 2016-05-18 | 广州追远电气机械有限公司 | Online checkweigher based on electromagnetic force balance sensor |
| CN106679776A (en) * | 2015-11-11 | 2017-05-17 | 余姚市爱佟塑料制品厂 | Weighing sensor applicable to electronic scales |
| EP3208583A1 (en) * | 2016-02-19 | 2017-08-23 | Mettler-Toledo GmbH | Power transmission device with separate position sensor lever arm |
| CN209326751U (en) * | 2019-03-21 | 2019-08-30 | 中国测试技术研究院力学研究所 | On-line weighting system based on electromagnetic force balance sensor |
| CN110307886A (en) * | 2019-07-16 | 2019-10-08 | 深圳市杰曼科技股份有限公司 | A kind of big tare weight Weight detecting device and its detection method based on electromagnetic force |
| CN216283845U (en) * | 2021-08-27 | 2022-04-12 | 上海品技科学仪器有限公司 | Electromagnetic force balance weighing sensor |
-
2021
- 2021-08-27 CN CN202110992650.9A patent/CN113532600A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130161103A1 (en) * | 2011-12-22 | 2013-06-27 | Mettler-Toledo Ag | Weighing cell based on the principle of electromagnetic force compensation with optoelectronic position sensor |
| CN203551054U (en) * | 2013-11-13 | 2014-04-16 | 余姚市新竹智控技术有限公司 | Integrated elastomer of high-precision electromagnetic force balancing type weighing sensor |
| CN104374454A (en) * | 2014-11-14 | 2015-02-25 | 天津大学 | High-precision electronic balance measuring system based on single sensor |
| CN106679776A (en) * | 2015-11-11 | 2017-05-17 | 余姚市爱佟塑料制品厂 | Weighing sensor applicable to electronic scales |
| CN205236454U (en) * | 2015-12-25 | 2016-05-18 | 广州追远电气机械有限公司 | Online checkweigher based on electromagnetic force balance sensor |
| EP3208583A1 (en) * | 2016-02-19 | 2017-08-23 | Mettler-Toledo GmbH | Power transmission device with separate position sensor lever arm |
| CN209326751U (en) * | 2019-03-21 | 2019-08-30 | 中国测试技术研究院力学研究所 | On-line weighting system based on electromagnetic force balance sensor |
| CN110307886A (en) * | 2019-07-16 | 2019-10-08 | 深圳市杰曼科技股份有限公司 | A kind of big tare weight Weight detecting device and its detection method based on electromagnetic force |
| CN216283845U (en) * | 2021-08-27 | 2022-04-12 | 上海品技科学仪器有限公司 | Electromagnetic force balance weighing sensor |
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