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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

Active Publication Date: 2007-11-14
SHANGHAI AUTOMATION INSTRAION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The signal is small, and the resistance during switching is required to be extremely small. Therefore, the existing technology uses a reed switch with a very small switching resistance. The signal switching circuit of each measurement point is composed of seven reed switches and a coil, which is not only large in size, but also Complicated assembly and commissioning, and because their manufacturing process determines that their thermal stability and consistency are not good enough, the performance of the instruments cannot be improved

Method used

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  • Signal switching apparatus of static multi-point strainmeter
  • Signal switching apparatus of static multi-point strainmeter

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Embodiment Construction

[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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Abstract

The invention discloses a signal conversing device of static multipoint strain gauge, which comprises the following parts: several detecting point conversing circuit, conversing controller and center controller, wherein the detecting point conversing circuit contains first input end A, second input end C, first output end B, second output end D, fifth relay K5, sixth relay K6, seventh relay k7, first fixing resistance R1, second fixing resistance R2, first switch-in point RX1, second switch-in point RX2, third switch-in point RX3, forth switch-in point RX4. The invention reduces error from 0.5 percent to 0.3 percent, which improves conversing speed obviously.

Description

technical field [0001] The invention relates to a signal switching device, in particular to a signal switching device used in a static multi-point strain gauge. Background technique [0002] The static multi-point strain gauge is specially designed to detect the deformation of materials under the action of static force. It can effectively detect the force strength of engineering design, so as to judge whether it meets the safety requirements of the design. For example, when a bridge is built, when the vehicle is stationary on the bridge, it is necessary to detect the stress intensity and distribution of each point on the bridge. Since the instrument solves the stress situation of multiple points, its key part is multi-point switching. In addition to solving point-to-point conversion, the switching circuit also has various state conversions within a point. According to requirements, there are various applications of single-chip, double-chip and multi-chip. Because the change...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/16G01N3/08
Inventor 郭卫伟钱英云
Owner SHANGHAI AUTOMATION INSTRAION CO LTD
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