CN201637630U - All-in-one laser Young modulus detector - Google Patents

Abstract

The utility model discloses a all-in-one laser Young modulus detector which is a physical experiment instrument. By utilizing an optical lever principle, the tiny extension of a wire under the action of external force is converted into corresponding deflection of horizontal line laser emitted by a laser optical lever; and the horizontal line laser is projected on a ruler of a base platform after being reflected by a plane mirror at the top of the instrument, and the offset of a horizontal light ray is calibrated by the ruler, thereby directly reading the amplified tiny extension of the wire on the instrument. The detector has all-in-one design, overcomes the defects of difficult light path adjustment and remote reciprocating operation of the traditional Young modulus detector, can be independently and conveniently used for test by a single person and is beneficial to saving experiment space and experiment time.

Description

One-piece type laser measure apparatus of youngs modulus

Technical field

The utility model relates to a kind of physical experiment apparatus measure apparatus of youngs modulus, especially adopts optical lever principle, utilization pulling method to measure the experiment instrument of metal Young modulus.

Background technology

Young modulus is an important physical parameter of reflection characteristic of material mechanics.Traditional pulling method is measured metal Young modulus experiment instrument and is adopted the optical lever principle, small elongation wiry amplified by the specular light lever, and by placing telescope and scale at a distance to observe.But in actual mechanical process, be difficult for finding the scale picture that is come together by the optical lever flat mirror reflects in telescope, the experimenter often need expend the plenty of time and regulate instrument.In addition, telescope has certain distance apart from Young modulus instrument, needs a people at instrument place increase and decrease counterweight in the operating process, and another people is at observation of telescope place and record data, perhaps a people runs between instrument and telescope back and forth, thereby can't independently and easily finish experiment measuring.

The utility model content

The technical problems to be solved in the utility model provides a kind of more convenient one-piece type measure apparatus of youngs modulus of regulating and operate, and can will utilize the wiry small elongation after the optical lever principle is amplified directly to read on the Young modulus experiment instrument.

In order to solve the problems of the technologies described above, one-piece type laser measure apparatus of youngs modulus of the present utility model has been done following improvement to the optical lever and the light path of traditional Young modulus experiment instrument: replace level crossing to be contained in a word line laser instrument and constitute the laser light lever on the T shape frame, laser instrument sends a word line laser straight up, after being fixed in the flat mirror reflects on the rack beam of instrument upper end, be incident upon and be fixed under the level crossing on the scale on the optical lever platform, with the reading graticule of a word line as scale.When small elongation takes place in tinsel under external force, make small deflection by laser light lever drives one word light, after flat mirror reflects, be converted into the variation of rod reading, thereby measure small elongation wiry, and further calculate the Young modulus of material thus.

The utility model is owing to adopt above-mentioned integrated design, and it is simple in structure, does not need just direct reading on instrument of telescope, can single independence experimentize easily, helps simplifying experimental implementation, saving lab space and experimental period.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is a side view of the present utility model

Fig. 2 is a front view of the present utility model

Fig. 3 is the stereographic map of laser light lever

Fig. 4 is measuring principle figure of the present utility model

Embodiment

Fig. 1, one-piece type laser measure apparatus of youngs modulus shown in Figure 2 are by support 1, with upward tinsel 2 (lower chuck 7), laser light lever 3, level crossing 4, scale 5, the base platform 6 of lower chuck are formed, level crossing 4 minute surfaces are fixed on the crossbeam of end support 1 on the instrument down, scale 5 and level crossing 4 over against and be installed in the homonymy of laser light lever 3 on the base 6.

Laser light lever shown in Figure 3 is made up of a T shape frame 11 and a word line laser instrument 8, and two front foots 10 and the metapedes 9 of T shape frame 11 are contour, and laser instrument 8 is vertical with plane, T shape frame 11 3 toe place, and the degree of tilt of the word light that laser instrument 8 sends is fine-tuning.

Its measuring principle and measuring method are as follows:

Referring to Fig. 1 and Fig. 2, the back toe 9 of T shape frame 11 is put into clamps on the lower chuck 7 wiry, toe 10 is placed on the base platform 6 before two, open laser power supply, make laser instrument 8 send the thin light of in-line straight up, reflex to the m place of scale 5 among Fig. 4 through level crossing 4, a word line is as the reading graticule of scale, the degree of tilt of the word light that the position of fine setting T shape frame 11 and laser instrument 8 send makes word line laser and scale label line parallel.When small elongation Δ L takes place in tinsel 2 under the pulling force effect, the optical lever rear foot is with tinsel chuck decline Δ L, drive laser instrument 8 and turn over a minute angle α, the incident angle of laser directive level crossing 4 is also rotated α thereupon, so light is mapped to the p place of scale 5 among Fig. 4, can measure the displacement N of light on scale by the difference of reading of m, p.

If the vertical range of optical lever metapedes 9 to two front foots 10 lines is K, scale 5 is D to the distance of level crossing 4, is got by Fig. 4 light path:

$\tan \mathrm{\α}=\frac{\mathrm{\ΔL}}{K}$ $\tan \mathrm{\α}=\frac{N/2}{D}$

So, $\frac{N/2}{D}=\frac{\mathrm{\ΔL}}{K},$

Recording small elongation wiry thus is

$\mathrm{\ΔL}=\frac{\mathrm{KN}}{2D}$

All the other measurements and computing method are identical with conventional Young modulus experiment.

Claims (3)

1. one-piece type laser measure apparatus of youngs modulus, by support (1), with upward tinsel (2), laser light lever (3), level crossing (4), scale (5), the base platform (6) of lower chuck are formed, laser light lever (3) is made up of laser instrument (8) and T shape frame (11), two front foots (10) and the metapedes (9) of T shape frame (11) are contour, it is characterized in that: level crossing (4) minute surface is fixed on the end support on the instrument (1) down, scale (5) and level crossing (4) over against and be installed in the homonymy that base platform (6) is gone up laser light lever (3).

2. according to the described one-piece type laser measure apparatus of youngs modulus of claim 1, it is characterized in that: described laser instrument (8) is a word line laser instrument, and the degree of tilt of the word light that it sends is fine-tuning.

3. according to the described one-piece type laser measure apparatus of youngs modulus of claim 1, it is characterized in that: described laser instrument (8) is vertical with plane, T shape frame (11) three toe place.

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