Water proof electronic digital display callipers
An electronic digital and waterproof technology, applied in the field of measuring instruments, can solve the problems of caliper display value deviation, inability to work properly, ferromagnetic particles and dust sensitivity, etc., to reduce power consumption, reduce volume, reliability, and process stability. Effect
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[0024] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0025] Such as figure 1 As shown, the present invention includes a fixed ruler 1, a movable ruler 6, several sensor coils 4, a drive circuit 3, a control circuit 5, a display, a communication interface, buttons, dry batteries and the like. The drive circuit 3 includes a driver and a pulse circuit, and the control circuit 5 includes a single-chip microcomputer, a controller, a sampler, a display circuit, a communication interface, and an interface circuit. A series of metal reflective conductors 2 with regular shapes are evenly arranged on the fixed length 1 along the moving direction of the fixed length; the moving ruler 6 is installed on the fixed length through a mechanical structure, and can slide along the fixed length body; Several eddy current sensor coils 4 are installed on the 6, and these sensor coils 4 are uniformly arranged along t...
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