CN108225155B - Measuring tool and method suitable for large-size radius - Google Patents
Measuring tool and method suitable for large-size radius Download PDFInfo
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- CN108225155B CN108225155B CN201810099305.0A CN201810099305A CN108225155B CN 108225155 B CN108225155 B CN 108225155B CN 201810099305 A CN201810099305 A CN 201810099305A CN 108225155 B CN108225155 B CN 108225155B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model provides a be applicable to jumbo size radius's measurement frock, includes the caliber, the caliber by be the measurement stabilizer blade that falls T style of calligraphy and bottom both ends have symmetrical spike and along measuring stabilizer blade central line setting and carved with the vernier scale of measuring the scale and constitute, measurement stabilizer blade and vernier scale cooperation that slides, its characterized in that still includes the direction support, the direction support erect perpendicularly and be measured on the face, and the direction support is rectangular distribution on the coplanar with the contact position of being measured the face, measurement stabilizer blade stretches into in the direction support, the direction support supports measurement stabilizer blade and is measured the face vertical contact to with measurement stabilizer blade direction cooperation, the direction of movement of limiting measurement stabilizer blade on the measuring face. The invention effectively positions the measurer and guides the movement of the measurer on the measuring surface, thereby improving the accuracy and reliability of measurement. The invention also provides a measuring method suitable for the large-size radius.
Description
Technical Field
The invention relates to a measuring tool and a measuring method suitable for large-size radius, which are used for measuring the large-size radius.
Background
For products or articles with circular appearance characteristics, the diameter radius value is measured or estimated, and under the condition that the size is not too large, a relatively accurate inner and outer diameter micrometer and vernier caliper can be used, and a relatively rough steel plate micrometer, a tape measure, a belt measure and other measuring tools can be used. However, when the product or article has a large or even oversized diameter radius (e.g., greater than 2 meters or more), or is limited by the gauge range, or the gauge is too large to be easily handled, it is difficult or impossible to measure the size. For example, for the measurement of the inner diameter, the outer diameter and the spigot of a conventional part, generally not more than 1 meter, a common inner diameter micrometer and a common vernier caliper can be used. For the size of the wind driven generator with the power in megawatt level, the diameter is more than 5 meters or more, the measurement is very difficult, only a tape or rope with an ultra-large measuring range is used for winding for one circle, and then the diameter radius value is obtained through measurement and conversion. In some extreme cases, there is no way to measure at all, but to estimate it visually, and the deviation is large.
CN 101846486A discloses a large arc radius measuring instrument and a measuring method, comprising a main scale, wherein the head of the main scale is a main scale measuring head, and the shape of the main scale is spherical; the vernier with a T shape is sleeved on the main scale, the vernier comprises a horizontal section and a vertical section, the vertical section is positioned on a vertical bisector of the horizontal section, and the vertical section is sleeved outside the main scale and can slide relative to the main scale; the two ends of the vernier horizontal section are vertically provided with measuring feet relative to the horizontal section, and the end parts of the measuring feet are vernier measuring heads and are spherical in shape. The spherical measuring heads of the main scale and the vernier are enabled to be well contacted with the measured arc through sliding fit of the main scale and the vernier, so that the chord height of the measured arc is conveniently measured, and the radius of the arc is calculated according to a formula; the instrument has simple structure, easy production and manufacture, and the measuring method is simple, convenient and quick.
CN 101451805 relates to a high-precision large arc radius measuring instrument, and also relates to a measuring and using method thereof, belonging to the technical field of detection tools. The measuring instrument comprises an arch frame, an indicator vertically inserted in the center of the length direction of the arch frame, and horizontal bubbles arranged near the middle of the arch frame, wherein measuring heads are respectively arranged at two ends of the arch frame through fasteners, the lower ends of the measuring heads are in a horizontal blade shape perpendicular to the length direction of the arch frame, two wedge-shaped fine-tuning blocks capable of being respectively shifted up and down are arranged between the end face of the arch frame and the measuring heads, and the wedge angles of the two fine-tuning blocks are the same or opposite.
The two prior patent documents are large-radius measuring tools and methods, the chord height of one section of the large arc is measured, and the radius value of the large arc is obtained through a calculation formula, and the method is simple and reliable, but has the defects that in the measuring process, if the radius value of the large arc is obtained through one measurement, the measuring precision and reliability are not high, if the measuring precision and reliability are uniform through multiple measurements, the measuring instrument is difficult to ensure to be vertical to a measured surface in the measuring process, two points of the measuring instrument, which are contacted with the measured surface, are positioned on the same arc line, and the measuring reliability and accuracy are still to be improved.
Disclosure of Invention
The measuring tool suitable for the large-size radius provided by the invention can be used for effectively positioning the measurer and guiding the movement of the measurer on the measuring surface, so that the measuring accuracy and reliability are improved. The invention also provides a measuring method suitable for the large-size radius.
The technical scheme adopted by the invention for achieving the purpose is as follows:
the utility model provides a be applicable to jumbo size radius's measurement frock, includes the caliber, the caliber by be the measurement stabilizer blade that falls T style of calligraphy and bottom both ends have symmetrical spike and along measuring stabilizer blade central line setting and carved with the vernier scale of measuring the scale and constitute, measurement stabilizer blade and vernier scale cooperation that slides, its characterized in that still includes the direction support, the direction support erect perpendicularly and be measured on the face, and the direction support is rectangular distribution on the coplanar with the contact position of being measured the face, measurement stabilizer blade stretches into in the direction support, the direction support supports measurement stabilizer blade and is measured the face vertical contact to with measurement stabilizer blade direction cooperation, the direction of movement of limiting measurement stabilizer blade on the measuring face.
Preferably, the guide bracket is provided with a guide through hole, the measuring support leg extends into the guide bracket from the guide through hole to vertically contact with the measured surface, and the guide through hole is matched with the measuring support leg to limit the moving direction of the measuring support leg on the measured surface.
Preferably, the length of the guide through hole is larger than the distance between the sharp feet at the bottom of the measuring support leg.
Preferably, two sides of the guiding bracket in the width direction are provided with penetrating through holes for the measuring support leg parts to extend out.
Preferably, the measuring support leg is in surface contact fit with the inner side wall of the guide through hole.
Preferably, the guide bracket consists of a front guide plate and a rear guide plate which is aligned with the front guide plate and is close to the front guide plate, the front guide plate and the rear guide plate are uniformly in a door frame shape and fixedly connected at a bent angle, a bulge which protrudes backwards is arranged at the bent angle of the front guide plate, the bent angle of the rear guide plate is fixedly connected with the bulge, and a guide through hole and a penetrating through hole are formed between the front guide plate and the rear guide plate.
Preferably, the front guide plate and the rear guide plate are in line contact with the measured surface.
Preferably, the measurer and the guide bracket are made of stainless steel, the upper end of the measuring support leg is fixed with a precision ruler matched with the vernier, the precision ruler is carved with a measuring scale matched with the vernier, and the vernier is provided with a locking screw for locking the vernier on the measuring support leg.
The measuring method for the large-size radius adopts the measuring tool suitable for the large-size radius for measurement, and the measuring steps are as follows:
a, vertically erecting a guide bracket on a measured surface;
b, stretching the measurer into the guide bracket, wherein the sharp feet at the bottom of the measurer are vertically contacted with the measuring surface;
c: the vernier is moved downwards to contact with the measured surface, and the distance delta that the vernier extends downwards to the measuring support leg is recorded;
and D, calculating the radius of the measured surface according to the value of delta, the distance b and the height c of the sharp feet at the two ends of the bottom of the measuring support leg.
Preferably, the step C specifically includes: after each movement is measured, the vernier is contacted with the measured surface, the distances H1, H2, hn of the measuring support leg which downwards extend out of the vernier are measured, and the average value of H1, H2, hn is calculated, so that the value of delta is obtained.
The beneficial effects of the invention are as follows:
1. according to the invention, the guide bracket is vertically arranged on the measured surface, the measuring support legs extend into the guide bracket, and the measuring support legs vertically contact with the measured surface through the support of the guide bracket, so that the measuring device is effectively positioned, the inclination of the measuring device during measurement is prevented, and the reliability of measurement is improved.
2. The guide support is perpendicular to the measured surface, and the contact positions of the guide support and the measured surface are in rectangular distribution on the same plane, so that the guide support is distributed along the cross section direction of the measured surface, the guide support supports the measuring support to be in perpendicular contact with the measured surface, the two sharp feet at the bottom of the measuring support can be in contact with the circular arcs on the same cross section of the measured surface, the contact points of the measuring support and the measured surface are effectively prevented from being not on the same circular arcs, and the measuring accuracy is improved.
3. The guide support is matched with the guide of the measuring support leg, the moving direction of the measuring support leg on the measuring surface is limited, namely, the movement of the measurer on the measuring surface is guided, the inclination and the deviation of the measuring support leg in the moving process are avoided, the measuring support leg is ensured to be vertical to the measured surface all the time, the measuring support leg is always moved along the same circular arc line, and the measuring reliability and the measuring accuracy are improved.
4. Through measuring the removal of stabilizer blade on the guide bracket, can obtain a plurality of measured values at a measurement in-process, can verify the accuracy of measurement, also can improve measuring accuracy through the mode of calculating the average value.
Drawings
Fig. 1 is a schematic diagram of a measuring principle of a measurer in a specific embodiment.
FIG. 2 is a schematic diagram of the dimensional constraint relationship of the measurement foot.
Fig. 3 is a front cross-sectional view of a measurement tool suitable for use with a large radius in a particular embodiment.
Fig. 4 is a side cross-sectional view of a measurement tool suitable for use with large radius dimensions in an embodiment.
Fig. 5 is a top view of the guide bracket.
Fig. 6 is a schematic diagram showing a change in position of the measuring instrument moving on the surface to be measured.
Detailed Description
Embodiments of the present invention will be described in detail with reference to fig. 1 to 6.
The utility model provides a be applicable to jumbo size radius's measurement frock, includes caliber 1, caliber 1 by be the measurement stabilizer blade 11 that the T style of calligraphy just bottom both ends have symmetrical spike and along measurement stabilizer blade 11 central line set up and carved with the vernier scale 12 of measurement scale and constitute, measurement stabilizer blade 11 and vernier scale 12 sliding fit, its characterized in that still includes guide bracket 2, guide bracket 2 erect perpendicularly on being measured the face, and guide bracket 2 and be the rectangle and distribute on the coplanar with the contact position of being measured the face, measurement stabilizer blade 11 stretches into in the guide bracket 2, guide bracket 2 supports measurement stabilizer blade 11 and is measured the face perpendicular contact to with measurement stabilizer blade 11 direction cooperation, the direction of movement of limiting measurement stabilizer blade 11 on the measurement face.
The measurement principle of the measurer 1 in the embodiment is as follows: the distance b between the tips at both ends of the bottom of the measuring leg 11 is set to 400mm and the height c is set to 200mm, as shown in FIG. 2
。
As shown in fig. 1, a section of arc is cut, and an equilateral right triangle with a side length a is close to the arc, where R is the radius of the arc, δ is the shortest distance from the right triangle right angle to the arc, θ is the angle between the radius and the line, then it can be obtained:
wherein the method comprises the steps of
Simplified to obtain
Therefore, when the right-angle side length a of the equilateral right triangle is a fixed value, the radius value R required to be obtained is a function relation of the read value delta, has uniqueness of one-to-one mapping, and can be calculated by utilizing the formula to obtain a numerical value. For example, when the measured object is a straight line, i.e. the R value is infinite, then the measured δ value should be 200, so there are: when x=0, f (x) =0/2+2000/0, i.e., R is infinite.
As shown in FIG. 2, the measuring feet are set to strictly conform to the constraint relation of an equilateral right triangle, and when the measuring feet take on values
When the distance is mm, the distance b between the sharp feet at the two ends of the bottom of the measuring support leg 11 is 400mm, and the height c is 200mm. Thus (2)According to->
The radius of the measured surface can be calculated by measuring the value of delta in fig. 1, namely, the distance that the vernier 12 extends downwards from the measuring leg 11 is measured by contacting the vernier 12 with the measured surface in the measuring tool suitable for large-size radius.
As shown in fig. 3, the guide bracket 2 is vertically erected on the measured surface a, the measuring support leg 11 extends into the guide bracket 2, and the measuring support leg 11 is vertically contacted with the measured surface a through the support of the guide bracket 2, so that the measuring device 1 is effectively positioned, and the inclination of the measuring device during measurement is prevented; moreover, the guide support 2 is perpendicular to the measured surface A, and the contact positions of the guide support 2 and the measured surface A are in rectangular distribution on the same plane, so that the guide support 2 is distributed along the cross section direction of the measured surface A, the guide support 2 supports the measuring support leg 11 to be in perpendicular contact with the measured surface A, the two sharp feet at the bottom of the measuring support leg 11 can be in contact with the circular arcs on the same cross section of the measured surface A, the contact points of the measuring support leg 11 and the measured surface A are effectively prevented from being not in the same circular arcs, and the measuring accuracy is improved. The guide support 2 is matched with the guide of the measuring support leg 11 in a guiding manner, the moving direction of the measuring support leg 11 on the measuring surface is limited, namely, the movement of the measuring device 1 on the measuring surface A is guided, the inclination and the deviation of the measuring support leg 11 in the moving process are avoided, the measuring support leg is always perpendicular to the measured surface, the measuring support leg always moves along the same circular arc line, and the measuring reliability and the measuring accuracy are improved. Through measuring the removal of stabilizer blade 11 on guide bracket 2, can obtain a plurality of measured values in a measurement process, can verify the accuracy of measurement, also can improve measuring accuracy through the mode of calculating the average value.
Wherein, the guide bracket 2 is provided with a guide through hole 21, the measuring support leg 11 extends into the guide bracket 2 from the guide through hole 21 to vertically contact with the measured surface, and the guide through hole 21 is matched with the measuring support leg 11 to limit the moving direction of the measuring support leg 11 on the measured surface. The length of the guide through hole 21 is larger than the distance between the bottom sharp feet of the measuring support leg 11. As shown in fig. 5, the guide through hole 21 is formed along the width direction of the guide bracket 2, that is, the length direction of the guide through hole 21 is parallel to the width direction of the measuring leg 11, the movement of the measuring leg 11 is performed under the guide of the guide through hole 21, the length of the guide through hole 21 is designed to be larger than the distance between the tips at the bottom of the measuring leg 11, so as to increase the arc angle of the movement of the measuring leg 11 on the guide bracket, increase the arc angle of the movement of the measuring leg 11 on the measured surface, increase the movement range of the measuring leg 11, and prolong the measurement value range, thereby improving the accuracy and reliability of the measurement value.
Wherein, two sides of the guiding bracket 2 in the width direction are provided with through holes 22 for the measuring support legs 11 to extend out. As shown in fig. 6, the measuring feet 11 may be extended from both sides of the guide bracket 2 to increase the moving range of the measuring feet 11, further extending the range of the measured value to improve the accuracy and reliability of the measured value.
Wherein, the measuring support leg 11 is in surface contact fit with the inner side wall of the guide through hole 21. As shown in fig. 4, the measuring leg 11 is in surface contact with the guide bracket 2, that is, the measuring leg 11 is in small clearance fit with the guide through hole 21, the measuring leg 11 is just clamped between two side walls of the guide through hole 21, and the measuring leg 11 can be ensured to be always vertical to the measured surface a in the moving process by the surface contact fit, so that the measuring leg 11 is prevented from tilting relative to the guide bracket 2.
Specifically, the guide bracket 2 is composed of a front guide plate 23 and a rear guide plate 24 aligned with the front guide plate 23 and close to each other, the front guide plate 23 and the rear guide plate 24 are uniformly in a door frame shape and fixedly connected at a bent angle, a bulge 23.1 protruding backwards is arranged at the bent angle of the front guide plate 23, the bent angle of the rear guide plate 23 is fixedly connected with the bulge 23.1, and a guide through hole 21 and a penetrating through hole 22 are formed between the front guide plate 23 and the rear guide plate 24. The front guide plate 23 and the rear guide plate 24 can be connected through bolts, and the guide bracket 2 is formed by the split connection of the front guide plate 23 and the rear guide plate 24, so that the forming process of the guide bracket 2 can be simplified, and the guide through holes 21 and the penetrating through holes 22 can be formed between the front guide plate 23 and the rear guide plate 24 quickly.
Wherein, the front guide plate 23 and the rear guide plate 24 are in line contact with the measured surface. As can be seen from fig. 3, the contact position between the bottom of the guiding bracket and the measured surface a is a sharp angle, that is, the corner edges of the front guiding plate 23 and the rear guiding plate 24, which are in contact with the measured surface a, are chamfered, so that the front guiding plate 23 and the rear guiding plate 24 are in line contact with the measured surface a, the guiding bracket 2 is placed on the measured surface a, the position of the guiding bracket 2 can be rapidly determined through the line contact of the bottom, the front guiding plate 23 and the rear guiding plate 24 are in contact with the measured surface a, the situation that the four contact positions of the guiding bracket 2 and the measured surface a are not in the same plane can be avoided, the guiding bracket 2 shakes, and the position stability of the guiding bracket 2 is improved.
The measuring device 1 and the guide support 2 are made of stainless steel, friction force of the measuring device 1 moving in the guide support 2 is reduced, an accuracy ruler 11.1 matched with a vernier 12 is fixed at the upper end of a measuring support leg 11, a measuring scale matched with the vernier 12 is carved on the accuracy ruler 11.1, a locking screw 12.1 for clamping the vernier 12 on the measuring support leg 11 is arranged on the vernier 12, the measuring device is equivalent to a common vernier caliper, and the accuracy of measurement is 0.02mm by matching the accuracy ruler 11.1 with the vernier.
The invention also provides a measuring method for the large-size radius, which adopts the measuring tool suitable for the large-size radius for measurement, and comprises the following measuring steps:
a, vertically erecting a guide bracket 2 on a measured surface;
b, stretching the measurer 1 into the guide bracket 2, wherein the sharp feet at the bottom of the measurer 1 are vertically contacted with the measuring surface;
c: the vernier 12 is moved downwards to contact with the measured surface, and the distance delta that the vernier 12 extends downwards to the measuring support 11 is recorded;
and D, calculating the radius of the measured surface according to the value of delta, the distance b and the height c of the sharp feet at the two ends of the bottom of the measuring support leg 11.
According to the measuring method, the measuring device is effectively positioned and moved and guided through the guide support 2, and the measuring reliability and accuracy are higher. Wherein, the step C specifically comprises the following steps: after each movement is measured by horizontally moving the measurer 1 on the guide support 2, the vernier 12 is contacted with the measured surface, the distances H1, H2, hn of the measuring support leg 11 extending downwards from the vernier 12 are measured, and the average values of H1, H2, hn are calculated to obtain the value of delta. Through measuring the removal of stabilizer blade on the guide bracket, at a measuring process, obtain a plurality of measured values, can verify the accuracy of measurement, also can improve measuring accuracy through the mode of calculating the average value.
The foregoing disclosure of embodiments of the present invention has been fully described with reference to the accompanying drawings, in which it is to be understood that the embodiments described are merely some of the embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (9)
1. The measuring tool suitable for the large-size radius comprises a measuring device (1), wherein the measuring device (1) is composed of measuring feet (11) which are inverted T-shaped and are provided with symmetrical sharp feet at two ends at the bottom and vernier scales (12) which are arranged along the central line of the measuring feet (11) and are carved with measuring scales, the measuring feet (11) are in sliding fit with the vernier scales (12), the distance between the sharp feet at two ends at the bottom of the measuring feet (11) is 400mm, and the height is 200mm, and the measuring tool is characterized by further comprising a guide bracket (2), wherein the guide bracket (2) is vertically erected on a measured surface, the contact positions of the guide bracket (2) and the measured surface are in rectangular distribution on the same plane, the measuring feet (11) extend into the guide bracket (2), the guide bracket (2) supports the measuring feet (11) to vertically contact with the measured surface and are in guide fit with the measuring feet (11), and the movement direction of the measuring feet (11) on the measured surface is limited;
two sides of the guiding bracket (2) in the width direction are provided with penetrating through holes (22) for the measuring support legs (11) to extend out.
2. The measuring tool for large-size radius according to claim 1, wherein the guide bracket (2) is provided with a guide through hole (21), the measuring support leg (11) extends into the guide bracket (2) from the guide through hole (21) to be vertically contacted with the measured surface, and the guide through hole (21) is matched with the measuring support leg (11) to limit the moving direction of the measuring support leg (11) on the measured surface.
3. The measuring tool for large-size radius according to claim 2, wherein the length of the guide through hole (21) is larger than the distance between the bottom sharp legs of the measuring leg (11).
4. The measuring tool for large-size radius according to claim 2, wherein the measuring support leg (11) is in surface contact fit with the inner side wall of the guide through hole (21).
5. The measuring tool for large-size radius according to claim 1, wherein the guide bracket (2) consists of a front guide plate (23) and a rear guide plate (24) aligned with the front guide plate (23) and close to the front guide plate (23), the front guide plate (23) and the rear guide plate (24) are uniformly in a door frame shape and fixedly connected at a bent angle, a bulge (23.1) protruding backwards is arranged at the bent angle of the front guide plate (23), the bent angle of the rear guide plate (24) is fixedly connected with the bulge (23.1), and a guide through hole (21) and a penetrating through hole (22) are formed between the front guide plate (23) and the rear guide plate (24).
6. The measuring tool for large-size radius according to claim 5, wherein the front guide plate (23) and the rear guide plate (24) are in line contact with the measured surface.
7. The measuring tool for large-size radius according to claim 1, characterized in that the measuring device (1) and the guide bracket (2) are made of stainless steel, the upper end of the measuring support leg (11) is fixed with a precision ruler (11.1) matched with the vernier (12), the precision ruler (11.1) is carved with a measuring scale matched with the vernier (12), and the vernier (12) is provided with a locking screw (12.1) for clamping the vernier (12) on the measuring support leg (11).
8. A measuring method for a large-size radius, which adopts the measuring tool for the large-size radius according to any one of claims 1 to 7 for measurement, and comprises the following measuring steps:
a, vertically erecting a guide bracket (2) on a measured surface;
b, stretching the measurer (1) into the guide bracket (2), wherein the sharp feet at the bottom of the measurer (1) are vertically contacted with the measuring surface;
c: the vernier (12) is moved downwards to be in contact with a measured surface, and the distance delta of the measuring support leg (11) which extends downwards from the vernier (12) is recorded;
and D, calculating the radius of the measured surface according to the value of delta, the distance b and the height c of the sharp legs at the two ends of the bottom of the measuring support leg (11).
9. The method for measuring a large radius according to claim 8, wherein the step C is specifically: after each movement is measured by horizontally moving the measurer (1) on the guide bracket (2), the vernier (12) is contacted with the measured surface, the distances H1, H2, … and Hn of the measuring support legs (11) extending downwards from the vernier (12) are measured, and the average value of H1, H2, … and Hn is calculated to obtain the value of delta.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810099305.0A CN108225155B (en) | 2018-02-01 | 2018-02-01 | Measuring tool and method suitable for large-size radius |
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| CN201810099305.0A CN108225155B (en) | 2018-02-01 | 2018-02-01 | Measuring tool and method suitable for large-size radius |
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| CN108225155A CN108225155A (en) | 2018-06-29 |
| CN108225155B true CN108225155B (en) | 2023-07-04 |
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| CN112504048B (en) * | 2020-10-30 | 2022-09-13 | 东方电气集团东方锅炉股份有限公司 | Device and method for measuring height and gradient of radial connecting pipe on regular curved surface |
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