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CN-121140913-B - Force vector self-calibration multi-position weighing electric balance and application method thereof

CN121140913BCN 121140913 BCN121140913 BCN 121140913BCN-121140913-B

Abstract

An electric balance with mass quantization definition and a use method thereof belong to the technical fields of metering science and mass measurement. The base is provided with a worm and gear lifting assembly, a laser interferometer and a PSD assembly, the worm and gear lifting assembly is connected with a support frame, the movable end of the worm and gear lifting assembly is provided with a flexible hinge weighing mechanism, the support frame is provided with a permanent magnet system, the middle part of the permanent magnet system is provided with a vacuum air floating guide rail, the vacuum air floating guide rail is matched with the flexible hinge weighing mechanism, the upper end and the lower end of the vacuum air floating guide rail are connected with a bracket, the brackets are connected through auxiliary rods, the auxiliary rods are connected with an induction coil, the induction coil is arranged in the middle part of the permanent magnet system, and the bracket is connected with a counterweight. The invention adopts the vacuum air floating guide rail and suppresses the space horizontal displacement and rotation variation of the induction coil by the rigid connection design with the induction coil, reduces the force vector alignment error, improves the quality measurement precision, shortens the acting path and limits the space movement posture change, realizes the quick and accurate balance force zero measurement, and improves the operation efficiency.

Inventors

  • LIN JIAJUN
  • WANG DAWEI
  • CUI JIWEN
  • TAN JIUBIN

Assignees

  • 哈尔滨工业大学

Dates

Publication Date
20260508
Application Date
20250812

Claims (6)

  1. 1. A force vector self-calibration multi-position weighing electric balance is characterized by comprising a base (4), a worm gear lifting assembly (5), a laser interferometer and PSD assembly (6), a flexible hinge weighing mechanism (7), a counterweight (8), an induction coil (9), a support frame (10), a vacuum air floatation guide rail (11), a permanent magnet system (12), a magnetic resonance system (C-type electromagnetic induction sensor, a magnetic resonance sensor and a magnetic resonance sensor, The device comprises a pulley assembly (13) and a bracket (14), wherein a worm and gear lifting assembly (5) and a plurality of laser interferometers and a PSD assembly (6) are arranged on the upper surface of a base (4), the worm and gear lifting assembly (5) is fixedly arranged in the middle of the base (4), a flexible hinge weighing mechanism (7) is fixedly arranged at the movable end of the worm and gear lifting assembly (5), the plurality of laser interferometers and the PSD assembly (6) are circumferentially arranged at the outer side of the worm and gear lifting assembly (5), the base (4) is fixedly connected with the lower end of a supporting frame (10), a permanent magnet system (12) is arranged at the upper end of the supporting frame (10), a vacuum air floating guide rail (11) is slidably inserted in the middle of the permanent magnet system (12), the lower end of the vacuum air floating guide rail (11) is matched with the flexible hinge weighing mechanism (7), the upper end and the lower end of the vacuum air floating guide rail (11) are respectively fixedly connected with the middle of the corresponding bracket (14), the two brackets (14) are fixedly connected through a plurality of auxiliary rods (25), the auxiliary rods (25) are fixedly connected with the middle parts of the corresponding auxiliary coils (9) in a horizontal mode, the induction coil (9) is vertically and slidably arranged in the middle of the permanent magnet system (12) and is concentrically arranged with the vacuum air floatation guide rail (11), the outer end of a bracket (14) positioned at the upper end is fixedly connected with a plurality of counterweights (8) through corresponding pull ropes respectively, each pull rope is respectively lapped on a pulley of a corresponding pulley assembly (13), a pulley frame of each pulley assembly (13) is fixedly connected with the permanent magnet system (12), and the flexible hinge weighing mechanism (7) comprises a base (16), A spectral confocal sensor (17), an upper top cover (18), a sensor upper cover (19) and a flexible hinge (20); the lower end of the base (16) is fixedly connected with the movable end of the worm gear lifting assembly (5), a flexible hinge (20) which is horizontally arranged is arranged at the upper end of the base (16) and clamps and fixes the flexible hinge (20) through an upper top cover (18), the side of the base (16) is connected with the working end of a spectrum confocal sensor (17) which is horizontally arranged and clamps and fixes the sensor through a sensor upper cover (19), the vacuum air floatation guide rail (11) comprises an air floatation main shaft (21), an upper shaft sleeve (22), the device comprises an outer cylinder body (24), a lower shaft sleeve (23) and an outer cylinder body (24), wherein the lower end of the upper shaft sleeve (22) is in sliding connection with the upper end inside the outer cylinder body (24), the upper end of the lower shaft sleeve (23) is in sliding connection with the lower end inside the outer cylinder body (24), the upper end of the upper shaft sleeve (22) and the lower end of the lower shaft sleeve (23) extend out of the outer cylinder body (24) and are fixedly connected with a permanent magnet system (12), an air inlet hole and an air outlet hole are formed in the upper end face of the upper shaft sleeve (22) and the lower end face of the lower shaft sleeve (23), the upper shaft sleeve (22) and the lower shaft sleeve (23) are both in sliding fit with the outer side of the air floatation main shaft (21), a hemispherical block (27) is arranged at the lower end of the air floatation main shaft (21), and the hemispherical block (27) is matched with an induction part of the flexible hinge (20).
  2. 2. The multi-position weighing electric balance with self-calibration force vector according to claim 1, wherein the flexible hinge (20) is made of a deformable material, the middle part of the flexible hinge (20) is an induction part, and a plurality of deformation notches are uniformly distributed around the circumference of the induction part.
  3. 3. The multi-position weighing electric balance with self-calibration force vector according to claim 2, wherein the outer wall of the upper shaft sleeve (22) and the outer wall of the lower shaft sleeve (23) are respectively provided with an axial pressure equalizing groove (26), and each axial pressure equalizing groove (26) is communicated with a corresponding air inlet hole and an air outlet hole.
  4. 4. A force vector self-calibrating multi-position weighing electric balance according to claim 1, characterized in that the base (4) is fixed on a base plate (2), the base plate (2) is placed on a foundation (1) and a leveling foot (3) is installed between the base plate (2) and the foundation (1).
  5. 5. A method of using a force vector self-calibrating multi-position weighing electric balance according to any of claims 1-4, characterized in that the method comprises the steps of: S1, ventilating the vacuum air floatation guide rail (11) through an air inlet, wherein the air floatation main shaft (21) downwards presses the flexible hinge (20) under the action of gravity, so that the flexible hinge (20) is deformed; s2, adjusting the weight of the counterweight (8) to enable the counterweight (8) to lift the air floatation main shaft (21) to balance the flexible hinge (20) through the bracket (14); S3, placing a standard weight (15) of 1kg at the upper end of the air floatation main shaft (21), and pressing the flexible hinge (20) again to deform due to the increase of weight; And S4, introducing direct-current constant current to the coil of the permanent magnet system (12), enabling the induction coil (9) to bear upward ampere force in a magnetic field, and driving the air floatation main shaft (21) to ascend through the bracket (14) until the flexible hinge (20) is balanced again, so as to obtain a force balance position Z1.
  6. 6. The method of using a force vector self-calibrating multi-position weighing electric balance of claim 5, further comprising the steps of: S5, adjusting the air floatation main shaft (21) to a designated position through a worm and gear lifting assembly (5); S6, repeating the step S4 to obtain a force balance position Z2; S7, repeating the steps S5-S6 for a plurality of times to obtain a plurality of force balance positions.

Description

Force vector self-calibration multi-position weighing electric balance and application method thereof Technical Field The invention relates to a force vector self-calibration multi-position weighing electric balance and a use method thereof, belonging to the technical field of electric balances. Background In the technical field of electric balances, the problem of force vector alignment is always a key technical bottleneck affecting the measurement accuracy of the device. According to the working principle of an electric balance, the core is that the generated electromagnetic force vector and the gravity mass of a standard weight are balanced by controlling an electrified induction coil immersed in a uniform magnetic field. Specifically, when a standard weight of 1kg is loaded on the weighing system, the electromagnetic force vector generated after the induction coil is electrified is required to be completely aligned with the weight gravity vector, so that mechanical balance is realized. However, in actual operation, if there is a posture bias of the induction coil with respect to the magnetic field space, the electromagnetic force vector generated by energization will inevitably contain components in a non-vertical direction. This misalignment error component can directly interfere with the balancing effect of the electrical balance, resulting in a bias in the measurement results. More importantly, in an electric balance device adopting a flexible suspension system, the non-vertical electromagnetic force component can cause the suspension system to swing, so that the relative spatial position between the induction coil and the magnetic field is dynamically changed. The position change further increases non-vertical components of electromagnetic force, forms a strong coupling effect of error component-space attitude offset-error component expansion, and obviously increases the regulation difficulty of force vector alignment. In the prior art, researches on a force vector self-alignment mechanism, an alignment error suppression method and a decoupling control strategy of a flexible suspension system of an electric balance device are insufficient, and a systematic technical scheme needs to be developed to solve the technical problems, so that the balance accuracy and the measurement reliability of the electric balance device are improved. Disclosure of Invention In order to solve the problems in the background technology, the invention provides a force vector self-calibration multi-position weighing electric balance and a use method thereof. The technical scheme is that the multi-position weighing electric balance with the self-calibration force vector comprises a base, a worm gear lifting assembly, a laser interferometer and PSD assembly, a flexible hinge weighing mechanism, a counterweight, an induction coil, a supporting frame, a vacuum floating guide rail, a permanent magnet system, a pulley assembly and a bracket, wherein the worm gear lifting assembly, the plurality of laser interferometers and the PSD assembly are mounted on the upper surface of the base, the worm gear lifting assembly is fixedly arranged in the middle of the base, the flexible hinge weighing mechanism is fixedly arranged at the movable end of the worm gear lifting assembly, the plurality of laser interferometers and the PSD assembly are circumferentially arranged on the outer side of the worm gear lifting assembly, the base is fixedly connected with the lower end of the supporting frame, the upper end of the supporting frame is provided with the permanent magnet system, the middle of the permanent magnet system is in sliding connection with the vacuum floating guide rail which is vertically arranged, the lower end of the vacuum floating guide rail is matched with the flexible hinge weighing mechanism, the upper end and lower end of the vacuum floating guide rail are respectively fixedly connected with the middle of the corresponding bracket, the two brackets are fixedly connected with each other through a plurality of auxiliary rods, the induction coils are fixedly arranged on the corresponding pulleys and the vertical sliding guide rail and are respectively arranged on the corresponding pulleys. Further, the flexible hinge weighing mechanism comprises a base, a spectrum confocal sensor, an upper top cover, a sensor upper cover and a flexible hinge, wherein the lower end of the base is fixedly connected with the movable end of the worm gear lifting assembly, the flexible hinge which is horizontally arranged is arranged at the upper end of the base and is clamped and fixed through the upper top cover, and the side of the base is connected with the working end of the spectrum confocal sensor which is horizontally arranged and is clamped and fixed through the sensor upper cover. Further, the flexible hinge is made of easily deformable materials, the middle part of the flexible hinge is an induction part, and a plurality of deformation