C-SHAPED CYLINDRICAL CORE FOR LINEAR VARIABLE DIFFERENTIAL TRANSFORMER (LVDT) PROBES

• Main Author: DANIELS AARON
• Format: Patent
• Language: Chinese; English
• Published: 29.05.2020
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TARIFF METERING APPARATUS; TESTING; TRANSFORMERS

Apparatus and associated methods relate to a linear variable differential transformer (LVDT) probe including a plunger rod and a metal sheet formed into a cylinder with a C-shaped cross-section, configured to couple to the plunger rod. In an illustrative example, the coupling may be an interference fit aided by spring retention forces of the metal sheet. The metal sheet may be stamped, formed andapplied to the plunger rod without annealing. One or more longitudinal metal sheet edges may be rounded. The C-shaped metal sheet may be welded to the plunger rod at a distal and/or proximal end. In some examples, the longitudinal edges of the metal sheet may be welded together and/or to the plunger rod. The ratio of relative electromagnetic permeability of the metal sheet to the plunger rod may be greater than 10. Various implementations may advantageously reduce lot-to-lot variability and reduce the cost of producing LVDTs. 装置和相关方法涉及一种线性可变差动变压器(LVDT)探针，其包括柱塞杆和成形为具有C形截面的圆柱体的金属片材，该金属片材被配置为耦接到柱塞杆。在示例性示例中，耦接可以是通过金属片材的弹簧