CN2521608Y - Data collecting device for resiliometer - Google Patents

Abstract

The utility model provides a rebound tester data collector, which engages with an apparatus used in building trades for measuring nondestructively concrete strength. The utility model comprises a casing body of a rebound tester, a guide bar, a graduated plate and slide blocks, which is characterized in that three non-contact switches with constant distance arranged on the casing body of the lower side of the graduated plate which is in a distance of less than twenty mm to initial reset, and the signal output terminals of the non-contact switches are connected with a microprocessor. The slide blocks arranged on the guide bar of the rebound tester all send signals to the microprocessor when striking and passing each non-contact switch, and then the microprocessor figures out maximum displacement of the slide blocks according to predetermined programs. The utility model has the advantages of precisely collecting data, perfect stability of system and long service time.

Description

The reisilometer data collector

It is not a kind of non-contact data harvester that the utility model provides a kind of reisilometer data collector, belongs to the data collector that a kind of instrument that is used for the nondestructive measurement concrete strength matches in the building trade.

Background technology---the direct-reading reisilometer has been widely used in measuring concrete intensity at present, write down the maximal value of each measuring point in effect sliding block resilience on the reisilometer guide rod of ram hammer, on request each concrete is surveyed part and will survey 10 districts, each is surveyed the district will select 16 measuring points.Workload of data collection is very heavy, inefficiency, and easily make mistakes.For addressing this problem, it is that " 88210311.3 " name is called the technology appearance of " concrete crushing strength instrument for evaluating " that the patent No. is arranged, its technical scheme is that slide potentiometer is installed on reisilometer, the sliding reed of this slide potentiometer and the pointer of reisilometer combine as a whole, the axial reisilometer needle pivot of potentiometer resistance wire coil is installed, and the simulating signal extension line of slide potentiometer connects computing machine.This technical scheme has had very big progress than the collecting method of direct-reading reisilometer, has reduced workload effectively.But because it has adopted slide potentiometer, and reed length service time one of slide potentiometer will be become flexible, and has increased the resistance of former reisilometer slide plate, has caused systematic error, causes the signal of being defeated by computing machine inaccurate, the data distortion of collection.Because being hit, slide plate carries out damped motion after the collision in addition, so the reed life-span of slide potentiometer is limited.

The purpose of this utility model is to provide a kind of and the matching used non-contact data harvester of reisilometer, and this data collector is simple to operate, the data accuracy rate height of collection, and the good stability of system.

The technical solution of the utility model is as follows: on housing below the existing direct-reading reisilometer scaleplate apart from reference position 20mm with three non-contact switch of interior installation, the constant distance of three non-contact switch, the signal output part of non-contact switch connects microprocessor.

Principle of work of the present utility model is as follows: after the slide block on the reisilometer guide rod is hit setting in motion, by first non-contact switch, first non-contact switch sends signal to microprocessor, microprocessor begins to clock, when slide block passes through second non-contact switch, second non-contact switch sends signal to microprocessor again, the microprocessor records slide block is by required time t1 between first non-contact switch to the second non-contact switch, when slide block passes through the 3rd non-contact switch, the 3rd non-contact switch sends signal to microprocessor, and the microprocessor records slide block is by three non-contact switch required times of first non-contact switch to the t ₂

The gauged distance of supposing first non-contact switch to the second non-contact switch is S ₁, the gauged distance of three non-contact switch of first non-contact switch to the is S ₂, microprocessor is according to preset program, according to the acceleration movement formula

s＝v ₀t+1/2at ²

Calculate acceleration a and slide block initial velocity v by first non-contact switch ₀ $a=\frac{2s_1{t}_2-2s_2{t}_1}{t_1{t}_2(t_1-t_2)}$ ${\mathrm{<figure-callout\; id="0"\; label="v"\; filenames="Y0221237200082.png"\; state="\{\{state\}\}">v</figure-callout>}}_0=\frac{s_1}{t_1}-\frac{s_1{t}_2-s_2{t}_1}{t_2(t_1-t_2)}$

Thereby calculate the maximum displacement of slide block $S_d=\frac{-{{\mathrm{<figure-callout\; id="0"\; label="V"\; filenames="Y0221237200082.png"\; state="\{\{state\}\}">V</figure-callout>}}_0}^2}{2a}$

To the maximum displacement of each measuring point slide block, device can both write down and the storage of collected data exactly, and can be transferred to the PC computing machine and carry out data processing, form output as required, prints.

Reisilometer non-contact data harvester provided by the utility model has following advantage:

1, do not increase any resistance of reisilometer slide block, kept the measuring accuracy of original reisilometer constant.

2, image data is accurate, and the good stability of system, life-span are long.

3, easy to install.

Description of drawings:

1, one of installation diagram of three non-contact switch of reisilometer described in the utility model and scaleplate thereof below-top view;

2, two-side view of the installation diagram of three non-contact switch of reisilometer described in the utility model and scaleplate thereof below;

3, the electrical schematic diagram of the described non-contact data harvester of utility model;

4, the electrical schematic diagram of the described reisilometer non-contact data of utility model harvester embodiment.

Below in conjunction with accompanying drawing simple declaration enforcement of the present utility model.In conjunction with Fig. 1, Fig. 2 as can be known, the below that three non-contact switch 2 are installed on reisilometer scaleplate 3 apart from reference position in 20mm, be embedded in the liner plate 4 below the scaleplate, liner plate 4 is sticking mutually with housing 5, slide block 7 slides on guide rod 6, slide block be subjected to impacting the back from first non-contact switch to the second again to the 3rd non-contact switch, three switches send signal to microprocessor respectively through cable outlet 1, image data, very simple and convenient.Accompanying drawing 3 is an embodiment of non-contact data harvester described in the utility model.Here adopt optoelectronic switch, can also adopt inductance switch; Installing used microprocessor can be a arbitrarily single-chip microcomputer with the input of three tunnel amount of logic.Here adopted 8051 microprocessors and expanded function sheet 8155 thereof, also can be with the data transmission of microprocessor to the PC computing machine.

Claims (2)

1, a kind of reisilometer data collector, comprise resiliometer casing, guide rod, scaleplate, slide block, it is characterized in that on housing below the scaleplate with interior three non-contact switch being installed apart from reference position 20mm, the constant distance of three switch rooms, the signal output part of three non-contact switch connects microprocessor.

2, reisilometer data collector according to claim 1 is characterized in that said non-contact switch is optoelectronic switch or inductance switch.

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