Signal switching apparatus of static multi-point strainmeter
A technology of signal switching and strain gauges, which is applied in the direction of electromagnetic measuring devices, electric/magnetic solid deformation measurement, and testing material strength by applying stable tension/pressure, which can solve the problems of large volume, complicated assembly and debugging, and inability to improve instrument performance. and other issues, to achieve the effect of increasing switching speed, overcoming thermal drift, and improving thermal stability
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[0013] As shown in Figure 1: switching device of the present invention comprises:
[0014] Several test point switching circuits 1;
[0015] The switching controller 2 is bidirectionally connected to several test point switching circuits, and is used to switch the working states of several test point switching circuits.
[0016] The central controller 3 is bidirectionally connected with the switching controller 2 and is used to control the output signal of the switching controller.
[0017] Each test point switching circuit 1 includes: a first input terminal A, a second input terminal C, a first output terminal B, a first output terminal D, and 7 relays (first relay K1, second relay K2, The third relay K3, the fourth relay K4, the fifth relay K5, the sixth relay K6, the seventh relay K7), 6 fixed resistors (the first fixed resistor R1, the second fixed resistor R2, the third fixed resistor R3, the Four fixed resistors R4, fifth fixed resistor R5, sixth fixed resistor R6), fo...
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