CN202511726U

CN202511726U - Non-zero starting point vernier caliper

Info

Publication number: CN202511726U
Application number: CN2012201545064U
Authority: CN
Inventors: 胡再国; 邹旭敏; 雍志华
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2012-04-13
Filing date: 2012-04-13
Publication date: 2012-10-31
Anticipated expiration: 2022-04-13

Abstract

The utility model discloses a non-zero starting point vernier caliper, and relates to the field of measuring tools, in particular to a common vernier caliper. Due to the manufacturing precision and wear of the vernier caliper, the zero position of the vernier and the zero position of a main scale are not aligned when two measuring jaws coincide with each other, a negative zero error possibly occurs, and an unfamiliar gauger gets a wrong reading. In order to evade the inconvenience in readings caused by zero starting point of the vernier caliper, the scales of the main scale of the vernier caliper are moved to the left by a certain distance. The technical scheme is that the main scale of the vernier caliper is moved to be left by 5 to 10mm, so when the two measuring jaws coincide with each other, the reading serves as a starting point; the numerical value of the length is obtained; and the difference between the measured value and the starting point value is the real length. The scale embodies the nature that the length is equal to the difference between two coordinates, and the concept of zero difference is not used; the inconvenience brought by the negative zero error is avoided; the requirement of the accurate positional relationship between the measuring jaws of the vernier caliper and the vernier is not high anymore, so that the manufacturing efficiency can be improved, and the rejection rate is reduced.

Description

The non-zero jumping-off point vernier caliper

Technical field

The utility model relates to the survey instrument field, the vernier caliper of particularly using always in the student experimenting.

Background technology

Vernier caliper is a kind of relatively more accurate measuring appliance; Can measure diameter, the degree of depth of cylinder class, internal diameter of cylinder etc.; The unit length that relies on vernier is come more accurate tolerance length than main scale is short, and common have 10 calibration (short 0.1mm), 20 calibration (short 0.05mm), 50 calibration (weak point 0.02mm).The starting point of vernier caliper all is 0, and the reading that blocks after the length is exactly the numerical value of length.

Because when precision of making and vernier caliper use the wearing and tearing that cause after a period of time that the measuring jaw of two measurement external diameters is closed up; 0 of vernier does not align with 0 of main scale; 0 the right when vernier at main scale 0; Can read a numerical value as homodyne (tare weight of container during similar measurement quality) from vernier, measured value is deducted the actual value that homodyne is a length; When 0 the left side of vernier (vernier caliper wearing and tearing cause all be this result) at main scale 0; The homodyne of this moment is for negative; Can not directly read the vernier value as homodyne this moment; And after should the vernier reading value being deducted 1 millimeter as homodyne, the student often can make a mistake at this moment, causes the measurement result mistake.

Summary of the invention

For overcoming vernier caliper starting point scale is the zero reading inconvenience that brings, and the utility model is moved to the left certain distance with the main scale scale of vernier caliper.

The technical scheme that its technical matters that solves the utility model adopts is: the numerical value of length is exactly the difference of two coordinates in fact, and people are for convenience of calculation, and starting point is set to coordinate 0 usually; Whether starting point is 0 not change the size of length itself in fact, can be non-zero values with the start design of vernier caliper therefore, theoretically; Starting point can be a numerical value arbitrarily; Most of people are relatively more responsive to fractional value, and big numerical value is easy to obscure, and suggestion is moved 5-10mm with the main scale of vernier caliper to the left side; When two measurement measuring jaws are drawn close; This moment, reading was as threshold value (being equivalent to measure the tare weight of quality), and then measured the numerical value of length, with measured value deduct threshold value be exactly physical quantity really be length.

The beneficial effect of the utility model is: this scale method returns the essence that length equals the difference of two coordinates, can not re-use the notion of homodyne; The reading inconvenience that can avoid the negative zero difference band; The position relation of vernier caliper measuring jaw and vernier will no longer require very accurate, can improve the efficient of manufacturing and reduce rejection rate.

Description of drawings

Fig. 1 is a non-zero starting point vernier caliper synoptic diagram.

Wherein, 1, vernier, 2, main scale.

Embodiment

When two were measured measuring jaws and draw close, the scale of the zero rough alignment main scale 1 of vernier 1 was 10mm, and reading value at this moment is as threshold value, and then obtained the measurement of length value, with measured value deduct threshold value be exactly physical quantity really be length.

Claims

1. the utility model non-zero jumping-off point vernier caliper is zero point with vernier caliper to be moved to the left certain distance, and it is characterized in that: the reading when two measuring jaws of vernier caliper close up is between 5-10mm.