CN2242452Y

CN2242452Y - Multi-function device for measuring force

Info

Publication number: CN2242452Y
Application number: CN 95229319
Authority: CN
Inventors: 周长炎
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-28
Filing date: 1995-12-28
Publication date: 1996-12-11
Anticipated expiration: 2005-12-28

Abstract

The utility model provides a multi-function device for measuring force, which comprises a long rod whose both ends are provided with two groups of resistance strain gauges respectively; four strain gauges in each group are positioned on the outer circumference of the long rod uniformly, and the strain gauges in each group are corresponded mutually. The resistors in each group are connected in series and then the strain gauges which are connected in series are connected into two bridge circuits, and two output points are arranged in each bridge circuit respectively; the two output ends of the bridge circuits are connected with an amplifying circuit and a digital-to-analogue conversion circuit respectively, and the two output ends are connected with a display by a single-chip; the multi-function device for measuring force is suitable for carrying out static exercises and measuring muscular strength, and can also be used for weighing.

Description

A kind of multi-functional dynamometer

The utility model relates to a kind of multi-functional dynamometer, and it can be used for the various occasions that need dynamometry, but it is specially adapted to carry out static exercise.

As everyone knows, the contraction of muscle has two kinds of citation forms, and a kind of is isotonic contraction, and another kind is isometric contraction.Carrying out power exercise with movement can perform physical exercise to the isotonic contraction of muscle, and static exercise then can perform physical exercise to the isometric contraction of muscle.Owing to exist above-mentioned two kinds of muscular movement forms simultaneously in daily routines and every sports events, dynamic property and firm static exercise are all significant.China improves the health with regard to useful static exercise before several thousand, for example, just has station stake, the ancient cooking vessel of putting on airs, two to refer to that buddhist or the like static exercise improves strength and anti-strike capability in wushu.From the sixties, the physiologist of some developed countries and coach have caused attention to static exercise, and have done a large amount of research and experiment.And China modern age to the research of static exercise and the utilization in training seldom.

The utility model aims to provide a kind of multi-functional dynamometer, and it can show the size that the practitioner exerts oneself, and also can be used as general dynamometer.

Multi-functional dynamometer of the present utility model comprises a stock, is provided with two groups of resistance strain gages at an end of described stock, and four foil gauges of every group are distributed on the excircle of stock, and the foil gauge in each group is corresponding mutually; The other end at described stock is provided with other two groups of resistance strain gages, and four foil gauges of every group are distributed on the excircle of stock, and the foil gauge in each group is corresponding mutually; With the resistance series connection in above-mentioned each group, and the foil gauge after will connecting connects into two bridge circuits, at each bridge circuit two output points are set respectively, two output terminals of described bridge circuit link to each other with D/A converting circuit with an amplifying circuit respectively, and these two output terminals link to each other with display by a single-chip microcomputer again.

Below in conjunction with accompanying drawing the utility model is described in detail, wherein:

Fig. 1 is the front elevation of the used stock of dynamometer of the present utility model;

Fig. 2 is the vertical view of stock shown in Figure 1;

Fig. 3 is the side view of stock shown in Figure 1;

Fig. 4 represents the electric bridge that resistance strain gage connected on the stock illustrated in figures 1 and 2;

Fig. 5 represents the electric bridge that resistance strain gage connected on the stock illustrated in figures 1 and 2;

Fig. 6 has represented Signal Processing that Fig. 4 and electric bridge shown in Figure 5 are measured;

Fig. 7 is the ergographic embodiment of the utility model;

Fig. 8 is ergographic another embodiment of the utility model.

As shown in Figure 1, it comprises a stock a kind of multi-functional dynamometer, end at described stock is provided with two groups of

resistance strain gages

1,5,4,8 and 2,6,3,7, four foil gauges of every group are distributed on the excircle of stock, and the

foil gauge

1 and 2 in each group, 5 and 6,4 and 3,8 and 7 is corresponding mutually; The other end of described stock then be provided with other two groups of resistance strain gages 1 ', 5 ', 4 ', 8 ' and 2 ', 6 ', 3 ', 7 ', four foil gauges of every group are distributed on the excircle of stock, and foil gauge 1 ' and 2 in each group ', 5 ' and 6 ', 4 ' and 3 ', 8 ' and 7 ' mutually corresponding; With above-mentioned each the group in

resistance

1 and 1 ', 2 and 2 ', 3 and 3 ', 4 and 4 ', 5 and 5 ', 6 and 6 ', 7 and 7 ', 8 and 8 ' series connection, and the foil gauge after will connecting connect into two

bridge circuits

1,1 ', 2,2 ', 3,3 ', 4,4 ' and 5,5 ', 6,6 ', 7,7 ', 8,8 ', at each bridge circuit two output point A and B, C and D are set respectively.

As shown in Figure 6, two output terminals A of described bridge circuit link to each other with the A/D D/A converting circuit with an amplifying circuit respectively with D with B and C, and these two output terminals and a single-chip microcomputer are handled two measured bridge voltage signals in this single-chip microcomputer.As with

resistance strain gage

1 and 2 and 1 ' and 2 ' towards directly over, that then measures among Fig. 4 is stock at the suffered component of vertical direction, what measure among Fig. 5 then is the suffered in the horizontal direction component of stock, these two power add at the enterprising row vector of single-chip microcomputer, can draw the size of suffered actual forces.This measurement result can be shown on the display.

Fig. 7 and Fig. 8 have represented two embodiment of the present utility model respectively.In structure shown in Figure 7, the two ends of described stock are connected with the longitudinal rod of pair of parallel respectively, and the position of stock on two longitudinal rods is adjustable.In another kind of utility structure shown in Figure 8, the two ends of described stock link to each other with the transverse bar of pair of parallel respectively, the two ends of transverse bar then are connected with the longitudinal rod of pair of parallel, and stock position and two positions of transverse bar on longitudinal rod on two transverse bars all are adjustable.

Multi-functional dynamometer of the present utility model can carry out static exercise, the development specific strength also improves technical movements, the strength size that can show the user during exercise, changed in the past that the practitioner has used very big strength but not know to have produced on earth what power, thus abstract, dull and uninteresting when having changed static exercise.The utility model can also be measured the muscle strength of parts of body even also can be used for measuring the weight of body weight and various article.

Claims

1, a kind of multi-functional dynamometer, it comprises a stock, it is characterized in that: the end at described stock is provided with two groups of resistance strain gages (1,5,4,8 and 2,6,3,7), four foil gauges of every group are distributed on the excircle of stock, and the foil gauge (1 and 2,5 and 6,4 and 3,8 and 7) in each group is corresponding mutually; The other end of described stock be provided with other two groups of resistance strain gages (1 ', 5 ', 4 ', 8 ' and 2 ', 6 ', 3 ', 7 '), four foil gauges of every group are distributed on the excircle of stock, and the foil gauge in each group (1 ' and 2 ', 5 ' and 6 ', 4 ' and 3 ', 8 ' and 7 ') corresponding mutually; With above-mentioned each the group in resistance (1 and 1 ', 2 and 2 ', 3 and 3 ', 4 and 4 ', 5 and 5 ', 6 and 6 ', 7 and 7 ', 8 and 8 ') series connection, and the foil gauge after will connecting connect into two bridge circuits (1,1 ', 2,2 ', 3,3 ', 4,4 ' and 5,5 ', 6,6 ', 7,7 ', 8,8 '), at each bridge circuit two output points (A and B, C and D) are set respectively, two output terminals of described bridge circuit link to each other with D/A converting circuit with an amplifying circuit respectively, and these two output terminals link to each other with display by a single-chip microcomputer again.

2, dynamometer as claimed in claim 1 is characterized in that: the two ends of described stock are connected with the longitudinal rod of pair of parallel respectively, and the position of stock on two longitudinal rods is adjustable.

3, dynamometer as claimed in claim 1, it is characterized in that: the two ends of described stock link to each other with the transverse bar of pair of parallel respectively, the two ends of transverse bar then are connected with the longitudinal rod of pair of parallel, and stock position and two positions of transverse bar on longitudinal rod on two transverse bars all are adjustable.