A jig for measuring electrical resistivity of silver alloy wire
A technology for measuring fixtures and resistivity, applied in the directions of measuring devices, measuring electrical variables, measuring device casings, etc., can solve the problems of prone to errors, increase the test workload, etc., and achieve the effects of convenient installation, saving test time and simple structure
Active Publication Date: 2016-08-31
宁波日中材料科技有限公司
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Problems solved by technology
[0003] The test formula of resistivity is ρ=RA / L, where L is the length of the wire to be tested, A is the cross-sectional area of the wire, and R is the resistance of a certain length of wire. It is necessary to measure the length when testing the resistivity of the material. Cross-sectional area and resistance, but when testing resistivity in large quantities, if there is no special test fixture to measure the above data, the workload of the test will be greatly increased, and errors are prone to occur
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Embodiment 1
[0016] First use a vernier caliper to measure the diameter A of the silver alloy wire to be measured to be 0.12cm 2 , pass the silver alloy wire through the through holes 5 of the two current terminals 3, then turn the pressing bolt 4 to press down on the silver alloy wire, and adjust the position between the two potential terminals 6 so that the potential terminal The upper ends of 6 all withstand the silver alloy wire. First, use a multimeter to measure the resistance R of the silver alloy wire between the two potential terminals 6 to be 6Ω, and the distance L between the two potential terminals 6 is 30cm. According to the formula ρ =RA / L can draw, the resistivity ρ of silver alloy material=2.4×10 -8 Ω·m.
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The invention relates to a resistivity measuring clamp for silver alloy wires. The resistivity measuring clamp comprises a pedestal (1), current terminals (3) and pressing bolts (4), wherein the current terminals (3) are symmetrically arranged on two sides of the upper end of the pedestal (1), lower end studs of the current terminals (3) penetrate through the pedestal (1) and locking nuts (2), a through hole (5) is transversely formed in the middle of each current terminal (3), the pressing bolts (4) are vertically arranged on the upper ends of the current terminals (3), the lower ends of the pressing bolts (4) are communicated with the through hole (5), and two potential terminals (6) are oppositely arranged on the pedestal (1) between clamping posts (3). The resistivity measuring clamp has the advantages of simple structure and convenience in assembly, thus a test on the resistivity of contact wires can be rapidly carried out, and the testing time is saved.
Description
technical field [0001] The invention relates to the field of detection equipment for silver alloys, in particular to a jig for measuring resistivity of silver alloy wires. Background technique [0002] The contact is a commonly used part in the electrical industry at present. It is mostly used in electrical control components such as relays and thermostats. The current contacts are mostly made of silver alloy materials. Due to the high conductivity of the contacts, it is The electrical conductivity of silver alloy materials is also very high. At present, the physical quantity that can be used to express the resistance characteristics of materials is the resistivity. The lower the resistivity, the better the conductivity of the material. [0003] The test formula of resistivity is ρ=RA / L, where L is the length of the wire to be tested, A is the cross-sectional area of the wire, and R is the resistance of a certain length of wire. It is necessary to measure the length when t...
Claims
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IPC IPC(8): G01R1/04G01R27/02
Inventor 王海涛凌国良乐平
Owner 宁波日中材料科技有限公司