CN207964504U - A kind of lever method modulus measurer - Google Patents

Abstract

A lever method Young's modulus measuring instrument, mainly used in the teaching of physics experiments in colleges and universities, including base, support rod, top platform, measuring platform, steel wire, steel wire upper chuck, steel wire lower chuck, weights, brackets, fixed feet , ruler Ⅰ, ruler Ⅱ, and the rotating hole on the ruler Ⅰ. Applying the lever method Young's modulus measuring instrument of the present utility model, it is no longer necessary to use the optical lever to adjust the complex optical path, and it is not necessary to measure the distance from the optical lever to the scale and the telescope, and only needs to read from the scale, which can be very convenient Measurements are made and the Young's modulus of the wire is calculated.

Description

A kind of lever method Young's modulus measuring instrument

technical field

The utility model belongs to the technical field of measurement, in particular to a measuring instrument for Young's modulus by a lever method.

Background technique

In university physics experiments, the determination of the Young's modulus of a wire requires the measurement of tiny displacements. Using optical levers to measure small displacements is a traditional measurement method. The concept of this method is clear and the structure is simple. However, the traditional optical lever measurement device needs to use a scale telescope to perform complex optical path adjustments to achieve the measurement task, which is very time-consuming.

Contents of the invention

The technical problem to be solved by the utility model is to provide a lever method Young's modulus measuring instrument, which is used for measuring the Young's modulus of metal wire easily and quickly.

The technical scheme of the utility model is:

A lever method Young's modulus measuring instrument, comprising a bracket, a top platform is installed on the upper end of the bracket, a central platform is installed on the middle section of the bracket, and a bottom platform is installed on the lower end of the bracket;

Legs are provided on the bottom platform;

A steel wire upper chuck is arranged on the top platform;

A steel wire lower chuck is arranged on the central platform;

A measuring device is placed on the central platform; the measuring device includes a scale I and a scale II, and one end of the scale I is provided with a round hole, and the supporting legs are placed on the central platform through the round hole, and the scale I is placed horizontally. The above scale II is vertical to the horizontal scale I;

The steel wire lower clamp includes a steel wire clamp main body, a hinge is arranged on the steel wire clamp main body, the clamp arm is hinged on the steel wire clamp main body through a hinge, a hook is arranged under the steel wire clamp main body, and the clamp arm There is a fixed belt that matches the clamp arm;

The fixing belt includes a fixing belt main body, one end of the fixing belt main body is provided with a counterweight, and the other end of the fixing belt main body is provided with a screw and a nut matched with the screw;

The lower clamp of the steel wire is hung with a weight through a hook.

The mode of operation of the utility model is:

When measuring, the steel wire is fixed between the steel wire upper chuck and the steel wire lower chuck, the fixed foot is fixed on the steel wire lower chuck, and the scale I is placed on the central platform through the supporting feet.

When a weight is added to the lower end of the steel wire, the steel wire is elongated, and the lower clamp of the steel wire has a slight displacement downward, so that the fixed foot rotates around the support foot, and drives the scale I to rotate, so that the end of the scale I away from the measuring platform has an upward displacement. This displacement can be obtained by subtracting the readings before and after adding the weight on the scale II. Then the tiny length of the steel wire stretched can be calculated through the proportional relationship, and then the Young's modulus of the steel wire can be calculated through the formula.

The beneficial effects of the utility model are:

Applying the lever method Young's modulus measuring instrument of the present utility model, it is no longer necessary to use the optical lever to adjust the complicated optical path, and it is not necessary to measure the distance from the optical lever to the scale and the telescope, and only needs to read from the scale, which can be very convenient Measurements are made and the Young's modulus of the wire is calculated.

Description of drawings

Fig. 1 is the utility model schematic diagram;

Fig. 2 is a schematic diagram of the utility model steel wire collet;

Fig. 3 is the schematic diagram of the fixed belt of the steel wire chuck of the present invention;

In the figure, 101-bracket, 102-top platform, 103-central platform, 104-bottom platform, 105-leg, 106-steel wire upper chuck, 107-steel wire lower chuck, 108-fixed foot, 109-round hole, 110-supporting feet, 111-ruler I, 112-ruler II, 113-weight, 201-wire chuck main body, 202-hinge, 203-jaw arm, 204-hook, 205-fixing belt, 301-fixing belt main body , 302-screw, 303-nut, 304-counterweight.

Detailed ways

The specific embodiment of the utility model is:

A kind of lever method Young's modulus measuring instrument, comprises bracket 101, and described bracket 101 upper end is equipped with top platform 102, and described bracket 101 middle section is equipped with central platform 103, and described bracket 101 lower end is equipped with bottom platform 104;

The bottom platform 104 is provided with feet 105;

The top platform 102 is provided with a steel wire upper chuck 106;

A steel wire lower chuck 107 is arranged on the central platform 103;

A measuring device is placed on the central platform 103; the measuring device includes a scale I111 and a scale II112, and one end of the scale I111 is provided with a round hole 109, and the supporting feet 110 pass through the round hole 109 and are placed on the central platform 103. I111 is placed horizontally, and the scale II112 is perpendicular to the horizontally placed scale I111;

The lower chuck 107 of the steel wire includes a steel wire chuck main body 201, the steel wire chuck main body 201 is provided with a hinge 202, the clamp arm 203 is hinged on the steel wire chuck main body 201 through the hinge 202, and the lower part of the steel wire chuck main body 201 A hook 204 is provided, and a fixing belt 205 matched with the clamp arm 203 is provided on the clamp arm 203;

The fixing belt 205 includes a fixing belt main body 301, one end of the fixing belt main body 301 is provided with a counterweight 304, and the other end of the fixing belt main body 301 is provided with a screw 302 and a nut 303 matched with the screw 302;

The steel wire lower chuck 107 is hung with a weight 113 through a hook 204 .

Claims (1)

1. A lever method Young's modulus measuring instrument, comprising a bracket (101), characterized in that, the upper end of the bracket (101) is equipped with a top platform (102), and the middle section of the bracket (101) is equipped with a central platform ( 103), the bottom platform (104) is installed at the lower end of the bracket (101); Legs (105) are set on the bottom platform (104); The top platform (102) is provided with a steel wire upper chuck (106); The central platform (103) is provided with a steel wire lower chuck (107); A measuring device is placed on the central platform (103); the measuring device includes a scale I (111) and a scale II (112), and one end of the scale I (111) is provided with a round hole (109), and a supporting foot (110 ) through the round hole (109) and placed on the central platform (103), the scale I (111) is placed horizontally, the scale II (112) can move freely and has a base, the scale II (112) and the horizontal The placed ruler I (111) is vertical and used in conjunction with the ruler I (111) during measurement; The steel wire lower clamp (107) includes a steel wire clamp main body (201), the steel wire clamp main body (201) is provided with a hinge (202), and the clamp arm (203) is hinged on the steel wire clamp through the hinge (202). On the main body (201), a hook (204) is provided under the wire chuck main body (201), and a fixing belt (205) matching with the clamp arm (203) is provided on the clamp arm (203); The fixing belt (205) includes a fixing belt main body (301), one end of the fixing belt main body (301) is provided with a counterweight (304), and the other end of the fixing belt main body (301) is provided with a screw (302) And the nut (303) matched with the screw (302); A weight (113) is hung on the steel wire lower chuck (107) through a hook (204).