CN201724642U

CN201724642U - Orthodrome radius measuring instrument

Info

Publication number: CN201724642U
Application number: CN 201020213755
Authority: CN
Inventors: 邓超云; 张栋
Original assignee: China Railway Longchang Materials Co Ltd
Current assignee: China Railway Longchang Materials Co Ltd
Priority date: 2010-06-03
Filing date: 2010-06-03
Publication date: 2011-01-26
Anticipated expiration: 2020-06-03

Abstract

The utility model discloses an orthodrome radius measuring instrument comprising a main scale, wherein the head of the main scale is a spherical main scale measuring head; the main scale is sleeved with a T-shaped vernier which comprises a horizontal section and a vertical section; the vertical section is positioned on the vertical bisector of the horizontal section and sleeved outside the main scale, and can slide relative to the main scale; two ends of the horizontal section of the vernier are vertically provided with measuring feet relative to the horizontal section; and the end parts of the measuring feet are spherical vernier measuring heads. The measuring instrument has the advantages: through the sliding fit of the main scale and the vernier, the spherical measuring heads of the main scale and the vernier can be better contacted with the circular arc measured so as to conveniently measure the chord height of the circular arc measured, thus calculating the circular arc radius according to the formula; and the measuring instrument has simple structure, and is easy to produce and manufacture and convenient in usage.

Description

Large circular arc radius measuring instrument

Technical field

The utility model relates to a kind of large circular arc radius measuring instrument.

Background technology

It is the comparison of arc model that the now actual large circular arc radius that uses is measured what all adopt, can only judge measured circular arc whether in intended scope, and can not know arc radius numerical value.

The utility model content

The utility model has overcome shortcoming of the prior art, and a kind of large circular arc radius measuring instrument is provided, and is simple in structure, produce easily and make, and easy to use.

The technical solution of the utility model is: a kind of large circular arc radius measuring instrument, comprise main scale, and described main scale head is the main scale gauge head, is shaped as sphere; Be with the vernier scale that is shaped as T shape on described main scale, described vernier scale comprises horizontal segment and vertical section, and vertical section is positioned on the perpendicular bisector of horizontal segment, and vertical section is enclosed within outside the main scale, and can slide with respect to main scale; Two ends at the vernier scale horizontal segment are vertically installed with the measurement pin with respect to horizontal segment, and the end of described measurement pin is the vernier scale gauge head, is shaped as sphere.

Described vernier scale is the liquid crystal vernier caliper, has LCD, is solidified with the circuit of computing formula function in described LCD, and described computing formula is

Figure 2010202137557100002DEST_PATH_IMAGE001

Compared with prior art, the utility model has the advantages that: by being slidingly matched of main scale and vernier scale, make the spheric probe of main scale and vernier scale can contact measured circular arc well, measure the action of measured circular arc easily, thereby calculate arc radius according to formula.Simultaneously, because the spheric probe of main scale and vernier scale is sphere, make the face contact or line contact a becoming contact of general measuring appliance, some contact specific surface contact or line contact when measuring arc surface is more accurate.

Description of drawings

The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:

Fig. 1 is a fundamental diagram of the present utility model;

Fig. 2 is that the utility model does not have the front view that liquid crystal shows;

Fig. 3 is the front view of the utility model band liquid crystal display;

Fig. 4 is the synoptic diagram that the utility model is measured outer arc radius;

Fig. 5 is the synoptic diagram that the utility model is measured inner arc radius.

Embodiment

A kind of large circular arc radius measuring instrument as shown in Figure 2, comprising: main scale 1, vernier scale 2, main scale gauge head 3, vernier scale gauge head 4, measure pin 6.

Main scale 1 is the ruler of a band scale, and its head is a main scale gauge head 3, is shaped as sphere, is used to contact the surface of measured circular arc.

Vernier scale 2 is as vernier, and it is shaped as T shape, comprises horizontal segment and vertical section, and vertical section is positioned on the perpendicular bisector of horizontal segment, and vertical section is enclosed within outside the main scale 1, and can slide over each other with main scale 1; At the two ends of vernier scale 2 horizontal segments, with respect to horizontal segment measurement pin 6 is set vertically, the end of measuring pin 6 is a vernier scale gauge head 4, is shaped as sphere, is used to contact the surface of measured circular arc.

In order when measuring, just in time to obtain measurement result, vernier scale 2 also can adopt existing liquid crystal vernier caliper, realize by in LCD, increasing the circuit that is solidified with the computing formula function, as shown in Figure 3: a kind of large circular arc radius measuring instrument, comprise: main scale 1, vernier scale 2, main scale gauge head 3, vernier scale gauge head 4, band computing function LCD 5, measure pin 6.Survey during measurement

Directly input to band computing function LCD 5, in band computing function LCD 5 inside according to formula: (

For known), carry out computing, obtain the arc radius of surveying

, and by band computing function LCD 5 demonstration radius readings.

Principle of work of the present utility model as shown in Figure 1, (length is 2 by being with fixedly chord length

) vernier scale 2 and the same circular section of measured circular arc circular arc on 2 points that contact, determine fixedly chord length 2

By adjusting the gauge head of main scale 1, contact again, measure fixedly chord length 2 with the same circular section of measured circular arc circular arc

The action of corresponding radian , utilize formula again:

, just can obtain the arc radius of surveying

The synoptic diagram that the utility model is measured outer arc radius as shown in Figure 4, the synoptic diagram of measuring inner arc radius is as shown in Figure 5.

Claims

1. a large circular arc radius measuring instrument comprises main scale, it is characterized in that: described main scale head is the main scale gauge head, is shaped as sphere; Be with the vernier scale that is shaped as T shape on described main scale, described vernier scale comprises horizontal segment and vertical section, and vertical section is positioned on the perpendicular bisector of horizontal segment, and vertical section is enclosed within outside the main scale, and can slide with respect to main scale; Two ends at the vernier scale horizontal segment are vertically installed with the measurement pin with respect to horizontal segment, and the end of described measurement pin is the vernier scale gauge head, is shaped as sphere.

2. large circular arc radius measuring instrument according to claim 1 is characterized in that: described vernier scale is the liquid crystal vernier caliper, has LCD, is solidified with the circuit of computing formula function in described LCD, and described computing formula is

Figure 2010202137557100001DEST_PATH_IMAGE001