CN105300257A - Angle measurement system - Google Patents
Angle measurement system Download PDFInfo
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- CN105300257A CN105300257A CN201510856155.XA CN201510856155A CN105300257A CN 105300257 A CN105300257 A CN 105300257A CN 201510856155 A CN201510856155 A CN 201510856155A CN 105300257 A CN105300257 A CN 105300257A
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Abstract
The invention discloses an angle measurement system including a connecting piece, a first member, a first measurement indicating assembly, a second member, and a second measurement indicating assembly. The first member comprises a first working face or a first working line. The first member is arranged on the connecting piece and drives the first working face or the first working line to rotate around a first axis with respect to a first reference line. The first measurement indicating assembly is used to measure and indicate the rotation angle of the first working face or the first working line around the first axis with respect to the first reference line. The second member comprises a second working face or a second working line. The second member is arranged on the connecting piece and drives the second working face or the second working line to rotate around a second axis with respect to a second reference line. The second measurement indicating assembly is used to measure and indicate the rotation angle of the second working face or the second working line around the second axis with respect to the second reference line. The first axis is parallel to the second axis. The system is fast in measurement speed and convenient for operation.
Description
Technical field
The present invention relates to survey instrument, be specifically related to angle measurement system.
Background technology
Fillet protractor, as a kind of novel survey instrument, has excellent operating performance, can directly measure fillet angle, measure the states such as parallel and vertical by reading.The structural forms such as V-type groove, dovetail groove can be measured simultaneously.And in conventional angle survey instrument market, most function singleness, can only the interior structural point in kind of measurement plane.In existing market, comparatively advanced angle measurement tool, mainly contains following several:
One, real intersection point angel measuring instrument.It is applicable to Entity measurement when there is a real intersection point on angle both sides.If the intersection point on institute's measuring angle both sides is imaginary intersection point, this protractor limit can not directly use.In real process, often need to carry out setting-out, could finally detect.Meanwhile, whether this protractor can not to detect two articles parallel or vertical.
Its two, universal protractor.This measuring instrument uses built-in gyroscope, can take measurement of an angle.Now need object to be inverted, make angle direction be gravity direction, can detect.But when using this protractor to measure above-mentioned angle, bother loaded down with trivial details, process also needs to calculate.To the measurement of angle on complex mechanism with regard to helpless.
Above protractor all can not meet the requirement of quick, easy measurement.
For this reason, expect to seek a kind of technical scheme, at least to alleviate the problems referred to above.
Summary of the invention
The technical problem to be solved in the present invention is, provides the angle measurement system that a kind of measuring speed is fast, easy and simple to handle.
For solving the problems of the technologies described above, adopt following technical proposals.
A kind of angle measurement system, comprising:
Web member;
First component, it comprises the first workplace or the first front, and it is arranged at described web member and described first workplace or the first front are rotated around first axle relative to the first datum line;
First measures indication component, for measuring and indicating the angle that described first workplace or the first front rotate around described first axle relative to described first datum line;
Second component, it comprises the second workplace or the second front, and it is arranged at described web member and described second workplace or the second front are rotated around the second axis relative to the second datum line; And
Second measures indication component, for measuring and indicating the angle that described second workplace or the second front rotate around described second axis relative to described second datum line;
Wherein, described first axle and described second axis parallel to each other.
Described first measures indication component comprises the first main measurement indicating member, and described first main measurement indicating member comprises the first angle master calibration being arranged at described first component and described first datum line coordinated with the first angle master calibration of this first component being arranged at described web member.
Described first measure indication component comprise there is the second angle master calibration and the first index dial rotated around first axle with described first component and be arranged at described web member and the first vernier angle scale coordinated with the second angle master calibration of described first index dial.
Described second measures indication component comprises the second main measurement indicating member, and described second main measurement indicating member comprises the 3rd angle master calibration being arranged at described second component and described second datum line coordinated with the 3rd angle master calibration of this second component being arranged at described web member.
Described second measures indication component comprises and has the 4th angle master calibration and the second index dial rotated around the second axis with described second component and be arranged at described web member and the second vernier angle scale coordinated with the 4th angle master calibration of described second index dial.
Described web member comprises the Part I be connected with described first component and the Part II be connected with this Part I by guideway be connected with described second component.
Described web member comprise the Part I that is connected with described first component and be connected with described second component and by hinge and the hinged Part II of this Part I, and the axis of this hinge is parallel with described first axle.
Described web member is ruler.
Described first measures indication component also comprises first and secondary measures indicating member, and the described first secondary indicating member of measuring comprises and has the secondary scale of the first angle and the first secondary index dial rotated around first axle with described first component and be arranged at described web member and the first reference graduation line coordinated with the first angle pair scale of described first secondary index dial.
Described second measures indication component also comprises second and secondary measures indicating member, and the described second secondary indicating member of measuring comprises and has the secondary scale of the second angle and the second secondary index dial rotated around the second axis with described second component and be arranged at described web member and the second reference graduation line coordinated with the second angle pair scale of described second secondary index dial;
Described guideway is line slideway auxiliary.
The precision of the angle index of described first component is 1 °, and the precision of the angle index of described first secondary index dial is 0.1 °.
The precision of the angle index of described second component is 1 °, and the precision of the angle index of described second secondary index dial is 0.1 °.
Described Part II is ruler.
Also comprise and measure described first workplace or the first front by self-sensor device and show the first electronic surveying display device of institute's measuring angle relative to described first datum line around the described first axle anglec of rotation.
Also comprise and measure described second workplace or the second front by self-sensor device and show the second electronic surveying display device of institute's measuring angle relative to described second datum line around the described second axis anglec of rotation.
The present invention has following Advantageous Effects.
When the present invention measures, first, two workplaces or first, two fronts fit with two limits at measured angle respectively, be fitted to each other use, measure indication component by first to measure and show angle that the first workplace or the first front rotate around first axle relative to the first datum line and the second measurement indication component and measure and show the angle that the second workplace or the second front rotate around the second axis relative to the second datum line, by first, the polygon that the limit of two datum lines and measured angle encloses or be projected on perpendicular to first, the polygon interior angle that two axis enclose and for the known number of degrees and except measured angle other interior angle be now the known number of degrees, the number of degrees of measured angle can be obtained by simple computation.As can be seen here, the present invention not only can measure the angle having real intersection point, and the angle of imaginary intersection point just directly can also can be measured when not needing setting-out, it is easy and simple to handle, measuring speed is fast, surveying work efficiency is high, can reduce construction cost, and its structure is simple simultaneously, cost of manufacture is low, is adapted at engineering field and promotes.
Accompanying drawing explanation
Fig. 1 schematically shows the embodiment of a kind of structure of the present invention.
Fig. 2 schematically shows the embodiment that a kind of structure of indication component measured by the first component of the present invention and first.
Fig. 3 schematically shows the embodiment (being in coincidence status at zero point) that the another kind of structure of indication component measured by the first component of the present invention and first.
Fig. 4 schematically shows the embodiment of another kind of structure of the present invention.
Fig. 5 is Fig. 4 I place enlarged drawing.
Fig. 6 is in the structural representation of using state for embodiment that Fig. 4 presents.
Fig. 7 schematically shows the embodiment (being in using state) of another structure of the present invention.
Fig. 8 schematically shows the embodiment (being in using state) of another structure more of the present invention
Fig. 9 is the partial enlarged drawing of web member in Fig. 8.
Embodiment
For can technical characteristic of the present invention and effect be described in detail, and can realize according to the content of this instructions, below in conjunction with accompanying drawing, embodiments of the present invention be further illustrated.
Fig. 1 illustrates the embodiment of a kind of angle measurement system in numerous embodiment of the present invention.This angle measurement system comprises web member 1, first component 2, first and measures indication component, second component 3 and the second measurement indication component.
In the present embodiment, web member 1 is ruler structure.
In the present embodiment, the first component 2 is semicircular plate-form structure, and it comprises the first workplace or the first front 21(first component 2 when having a certain thickness, and the first front 21 can be described as the first workplace 21).First component 2 is arranged at one end of web member 1, and make the first workplace or the first front 21 rotate (not shown) relative to the first datum line 11 around first axle, such as the first component 2 can be rotationally connected by the first axle (not shown) and web member 1, and the rotation of the first axle is first axle.
In the lump see Fig. 2, first measures indication component for measuring and indicating the angle that the first workplace or the first front 21 rotate around first axle relative to the first datum line 11.In the present embodiment, first measures indication component comprises the first main measurement indicating member, and this first main measurement indicating member comprises the first angle master calibration 22 being arranged at the first component 2 and the first datum line 11 coordinated with the first angle master calibration 22 of the first component 2 being arranged at web member 1.
Second component 3 is semicircular plate-form structure, and it comprises the second workplace or the second front 31(second component 3 when having a certain thickness, and the second front 31 can be described as the second workplace 31).Its second component 3 is arranged at the other end of web member 1, and make the second workplace or the second work 31 lines rotate (not shown) relative to the second datum line 12 around the second axis, such as second component 3 can be rotationally connected by the second axle (not shown) and web member 1, and the rotation of the second axle is the second axis.
Second measures indication component for measuring and indicating the angle that the second workplace or the second front 31 rotate around the second axis relative to the second datum line 13.It is identical that second measurement indication component and above-mentioned first measures indication component structure, for the sake of brevity, is not repeated.
Above-mentioned first axle and the second axis parallel to each other.
In certain embodiments, schematically show see Fig. 3, Fig. 3 the embodiment that the another kind of structure of indication component measured by the first component of the present invention and first in the lump.First measures indication component comprises and has the second angle master calibration 71 and the first index dial 7 rotated around first axle with the first component 2 and be arranged at web member 1 and the first vernier angle scale 70 coordinated with the second angle master calibration 71 of the first index dial 7.Such as, the first axle is fixedly connected with the first component 2 and is rotationally connected with web member 1, and in this case, the first index dial 7 is fixedly connected with this first axle, then, when the first component 2 rotates, the first index dial 7 rotates with the first component 2 under the drive of the first axle.
The first measurement indication component counting principle that Fig. 3 presents: the first index dial 7 is 360 °, and the precision of the second angle master calibration 71 is 1 °.The precision of the first vernier angle scale 70 is divided into 10 deciles by 9 °, and precision is 0.1 °.If needed, the precision of the first vernier angle scale 70 can be improved to radix point two.
Number reading method during actual measurement: in measuring process, first component 2 is due to after Entity measurement makes the corresponding rotation of the first index dial 7, the datum line of the first vernier angle scale 70 will point to or be close to a certain number of degrees of the second angle master calibration 71, and these number of degrees are the main reading of institute's measuring angle.Then find afterwards with the scale mark (the two scale marks degree aligned with each other of the first vernier angle scale 70, second angle master calibration 71 is best) of the immediate first vernier angle scale 70 of certain scale mark of the second angle master calibration 71 as basic point, this scale lattice number is multiplied by as secondary reading using the precision of the first vernier angle scale 70, afterwards this secondary reading is added with aforementioned main reading, is the actual number of degrees of this angle.Its counting principle is identical with vernier caliper.
See Fig. 1,2, the structure measuring indication component due to the second structure and Fig. 2 presents first measuring a kind of embodiment of indication component is identical, for the sake of brevity, does not present its structure for amplifying with figure again, specifically please refer to Fig. 2.Second measures indication component comprises the second main measurement indicating member, and the second main measurement indicating member comprises the 3rd angle master calibration 32 being arranged at second component 3 and the second datum line 12 coordinated with the 3rd angle master calibration 32 of this second component 3 being arranged at web member 1.
In certain embodiments, the structure measuring indication component due to the second structure and Fig. 3 presents first measuring a kind of embodiment of indication component is identical, for the sake of brevity, does not present its structure with figure again, specifically please refer to Fig. 3.Second measures indication component comprises and has the 4th angle master calibration and the second index dial rotated around the second axis with second component 3 and be arranged at web member 1 and the second vernier angle scale coordinated with the 4th angle master calibration of this second index dial.Its counting principle and method measure the identical of indication component with earlier figures 3 presents first, for the sake of brevity, are not repeated.
In certain embodiments, web member 1 comprises the Part I 13 be connected with the first component 2 and the Part II 14 be connected with this Part I 13 by guideway be connected with second component 3, as Fig. 4,5 the structure of web member 1 that presents.Part I 13 and Part II 14 can toward each other or opposing movement, to adjust the length of web member 1, to adapt to the measurement of the measured angle of different openings size.
Fig. 6 is in the structural representation of using state for embodiment that Fig. 4 presents.The web member 1 of this kind of angle measurement system is telescopic or ruler structure (shown in Fig. 1 structure), and its design concept completes based on " angle sum of a triangle is 180 ° " this mathematical theorem.Such as, when using first and second component 2,3 to measure instruction reading, precision is 0.1 degree.Using first and second electronic surveying display device 4,5(hereinafter will be described) when measuring instruction reading, precision can reach 0.01 °.As shown in Fig. 3,4,6, its scope that takes measurement of an angle (range) is 0 °≤θ≤180 °, and attribute is interior protractor, and the inside of the angle that can form from workpiece is measured.
The using method of the structure that Fig. 4 presents is as follows: in the lump see Fig. 6, when specifically measuring, first, two components 2, 3 rotations overlapped to zero point, again web member 1 is retractable to suitable length (not needing adjustment during ruler structure), rotate first respectively, two components 2, 3, to make first, two components 2, the working edge (face) 21 of 3, 31 respectively near measured workpiece, can from first, two measurement indication components (or first, two electronic surveying display devices 4, 5) directly respective angle [alpha] is read, β, then calculate according to " angle sum of a triangle is 180 ° ", namely according to formula θ=180 °-(alpha+beta), thus obtain measured angle θ.
In certain embodiments, as Fig. 7 the embodiment that presents, web member 1 comprise the Part I 13 that is connected with the first component 2 and be connected with second component 4 and by hinge (not shown) and the hinged Part II 14 of this Part I 13, and the axis of this hinge is parallel with first axle.Under can being convenient for measuring this structure, the angle between Part I 13 and Part II 14, is provided with the 3rd and measures indicating member 15 at hinge place.The version of the first measurement indication component that the version of the first secondary measurement indicating member (the first secondary indicating member of measuring hereinafter will be described in detail) that the 3rd measurement indicating member 15 can adopt Fig. 2 to present or Fig. 3 present.
Fig. 7 schematically shows the embodiment (being in using state) of another structure of the present invention.The web member 1 of this kind of angle measurement system is folding axis structure, its design concept completes based on " quadrilateral interior angle and be 360 ° " this mathematical theorem, certainly by decomposing, also can think to complete based on " angle sum of a triangle is 180 ° " this mathematical theorem.Such as, when using first and second component 2,3 to measure instruction reading, precision is 0.1 degree.Using first and second electronic surveying display device 4,5(hereinafter will be described) when measuring display reading, precision can reach 0.01 °.As shown in Figure 7, its scope that takes measurement of an angle (range) is 0 °≤θ≤180 °, and attribute is general-purpose protractor, and inside or the outside of the angle that can form from workpiece are measured.
The using method of the structure that Fig. 7 presents is as follows: when specifically measuring, by first of web member 1, two parts 13, 14 are folded each other rotates to suitable angle A (such as measuring indicating member 15 by the 3rd to record), first, two components 2, 3 rotations overlapped to zero point, rotate first respectively again, two components 2, 3, to make first, two components 2, the working edge (face) 21 of 3, 31 respectively near measured workpiece, can from first, two measurement indication components (or first, two electronic surveying display devices 4, 5) directly respective angle [alpha] is read, β, then calculate according to " quadrilateral interior angle and be 360 ° ", namely according to formula θ=360 °-{ 360 °-(alpha+beta+A) }=alpha+beta+A, thus obtain measured angle θ.
It should be noted that, first and second part 13,14 of the web member 1 that Fig. 7 presents can be folded each other the angle rotating and adjust angle to each other, but do not get rid of in advance according to practice of construction demand, first and second part 13,14 is bent into fixed angle toward each other, namely first and second part 13,14 can not be folded each other to rotate and adjust the angle of angle to each other, also can reach object of the present invention.
As Fig. 8,9 the embodiment that presents; the embodiment difference that itself and Fig. 4 present is; first and second part 13,14 is polymorphic structure; as first and second part 13,14 is Z-type at a right angle; its web member 1 adds level, vertical direction (for convenience of describing; level, the vertical direction of its be to by Fig. 8 present condition, can not be interpreted as it is limiting the scope of the invention here) flexible ability.
The using method of the structure that the embodiment using method that Fig. 8 presents presents with reference to above-mentioned Fig. 4 performs.
In certain embodiments, as Fig. 1,2, in order to improve the precision of survey measurements, first measures indication component also comprises first and secondary measures indicating member, and this first secondary indicating member of measuring comprises and has the secondary scale 61 of the first angle and the first secondary index dial 6 rotated around first axle with the first component 2 and be arranged at web member 1 and the first reference graduation line 60 coordinated with the first angle pair scale 61 of the first secondary index dial 6.
The precision of the first angle master calibration 22 of the first component 2 is 1 °, and the precision of the secondary scale 61 of the first angle of the first secondary index dial 6 is 0.1 °.
In certain embodiments, as Fig. 1,2, in order to improve the precision of survey measurements, because the second secondary measurement indicating member is identical with the structure that the first pair that Fig. 2 presents measures indicating member, for the sake of brevity, do not present its structure for amplifying with figure again.Second measures indication component also comprises second and secondary measures indicating member, and this second secondary indicating member of measuring comprises and has the secondary scale of the second angle and the second secondary index dial rotated around the second axis with second component 3 and be arranged at web member 1 and the second reference graduation line coordinated with the second angle pair scale of the second secondary index dial.
The precision of the 3rd angle master calibration of second component 3 is 1 °, and the precision of the secondary scale of the second angle of the second secondary index dial is 0.1 °.
In certain embodiments, above-mentioned guideway is line slideway auxiliary.Under this structure, Part II 14 is that ruler is better.
Measure for ease of survey measurements and improving, the precision of reading, the present invention also comprises and measures the first workplace or the first front 21 by self-sensor device and show the first electronic surveying display device 4 of institute's measuring angle relative to the first datum line 11 around the first axle anglec of rotation.
The present invention also comprises and measures the second workplace or the second front 31 by self-sensor device and show the second electronic surveying display device 5 of institute's measuring angle relative to the second datum line 11 around the second axis anglec of rotation.
First and second electronic surveying display device 4,5(are commonly referred to interface circuit or digital watch) customizable, use conventional button cell, the signal of circuit by producing during process coaxial rotating, precision can reach the angle precision of 0.01 °.
First and second electronic surveying display device 4,5 above-mentioned is measured indication component with first and second and also be can be regarded as corresponding Redundancy Design each other.As, when the first electronic surveying display device 4 breaks down, can measure indication component by first and measure instruction reading, other situations are by that analogy.
First and second component 2,3 that Fig. 3-8 presents is rectangular parallelepiped platy structure.
Be understandable that, first and second component 2,3 is not limited to above-mentioned presented structure, can also adopt other suitable structures.Above-mentioned web member 1 can also adopt the suitable structure except above-mentioned presented structure.
It should be noted that, unless otherwise clearly stating, above-mentioned term " first ", " second ", " the 3rd ", " the 4th " etc. do not represent order and install, and do not represent the importance of described element yet.
Also it should be noted that, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any applicable mode.Different each concrete technical characteristic described in embodiment, in reconcilable situation, also can be combined by any applicable mode each other.In order to avoid unnecessary repetition, the present invention is no longer described various possible array mode.
Above with reference to embodiment to invention has been detailed description, be illustrative and not restrictive, in the change do not departed under general plotting of the present invention and amendment, all within protection scope of the present invention.
Claims (16)
1. an angle measurement system, comprising:
Web member;
First component, it comprises the first workplace or the first front, and it is arranged at described web member and described first workplace or the first front are rotated around first axle relative to the first datum line;
First measures indication component, for measuring and indicating the angle that described first workplace or the first front rotate around described first axle relative to described first datum line;
Second component, it comprises the second workplace or the second front, and it is arranged at described web member and described second workplace or the second front are rotated around the second axis relative to the second datum line; And
Second measures indication component, for measuring and indicating the angle that described second workplace or the second front rotate around described second axis relative to described second datum line;
Wherein, described first axle and described second axis parallel to each other.
2. angle measurement system according to claim 1, wherein, described first measures indication component comprises the first main measurement indicating member, and described first main measurement indicating member comprises the first angle master calibration being arranged at described first component and described first datum line coordinated with the first angle master calibration of this first component being arranged at described web member.
3. angle measurement system according to claim 1, wherein, described first measure indication component comprise there is the second angle master calibration and the first index dial rotated around first axle with described first component and be arranged at described web member and the first vernier angle scale coordinated with the second angle master calibration of described first index dial.
4. angle measurement system according to claim 1, wherein, described second measures indication component comprises the second main measurement indicating member, and described second main measurement indicating member comprises the 3rd angle master calibration being arranged at described second component and described second datum line coordinated with the 3rd angle master calibration of this second component being arranged at described web member.
5. angle measurement system according to claim 1, wherein, described second measure indication component and comprise and there is the 4th angle master calibration and the second index dial rotated around the second axis with described second component and be arranged at described web member and the second vernier angle scale coordinated with the 4th angle master calibration of described second index dial.
6. angle measurement system according to claim 1, wherein, described web member comprises the Part I be connected with described first component and the Part II be connected with this Part I by guideway be connected with described second component.
7. angle measurement system according to claim 1, wherein, described web member comprise the Part I that is connected with described first component and be connected with described second component and by hinge and the hinged Part II of this Part I, and the axis of this hinge is parallel with described first axle.
8. angle measurement system according to claim 1, wherein, described web member is ruler.
9. angle measurement system according to claim 2, wherein, described first measures indication component also comprises first and secondary measures indicating member, and the described first secondary indicating member of measuring comprises and has the secondary scale of the first angle and the first secondary index dial rotated around first axle with described first component and be arranged at described web member and the first reference graduation line coordinated with the first angle pair scale of described first secondary index dial.
10. angle measurement system according to claim 4, wherein, described second measures indication component also comprises second and secondary measures indicating member, and the described second secondary indicating member of measuring comprises and has the secondary scale of the second angle and the second secondary index dial rotated around the second axis with described second component and be arranged at described web member and the second reference graduation line coordinated with the second angle pair scale of described second secondary index dial.
11. angle measurement systems according to claim 6, wherein, described guideway is line slideway auxiliary.
12. angle measurement systems according to claim 9, wherein, the precision of the angle index of described first component is 1 °, and the precision of the angle index of described first secondary index dial is 0.1 °.
13. angle measurement systems according to claim 10, wherein, the precision of the angle index of described second component is 1 °, and the precision of the angle index of described second secondary index dial is 0.1 °.
14. angle measurement systems according to claim 11, wherein, described Part II is ruler.
15. angle measurement systems according to any one of claim 1 to 14, wherein, also comprise and measure described first workplace or the first front by self-sensor device and show the first electronic surveying display device of institute's measuring angle relative to described first datum line around the described first axle anglec of rotation.
16. angle measurement systems according to any one of claim 1 to 14, wherein, also comprise and measure described second workplace or the second front by self-sensor device and show the second electronic surveying display device of institute's measuring angle relative to described second datum line around the described second axis anglec of rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510856155.XA CN105300257A (en) | 2015-11-27 | 2015-11-27 | Angle measurement system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510856155.XA CN105300257A (en) | 2015-11-27 | 2015-11-27 | Angle measurement system |
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| CN105300257A true CN105300257A (en) | 2016-02-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101611A (en) * | 2017-05-03 | 2017-08-29 | 安徽信陆电子科技有限公司 | A kind of angle measurement unit and angle regulation method |
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| WO1997003336A1 (en) * | 1995-07-07 | 1997-01-30 | Product Development Tayside Ltd. | Apparatus for measuring angles for mitres and bevels |
| FR2793018B1 (en) * | 1999-04-30 | 2001-07-13 | Rami Haidar | DEVICE FOR MEASURING AN ANGLE BETWEEN TWO PLANS |
| CN201000316Y (en) * | 2006-10-20 | 2008-01-02 | 陈平山 | High precision direction gauge |
| CN201552905U (en) * | 2009-12-03 | 2010-08-18 | 王凯 | Universal set square |
| CN103234433A (en) * | 2013-04-08 | 2013-08-07 | 常熟建工建设集团有限公司苏州分公司 | Multifunctional angle-measuring gauge |
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| CN86100346A (en) * | 1986-01-21 | 1987-10-28 | 成玉生 | Arbitrary triangle multifunction ratio drawing calculating ruler |
| JPS63121701A (en) * | 1986-11-12 | 1988-05-25 | Ohbayashigumi Ltd | Angle measuring instrument |
| WO1997003336A1 (en) * | 1995-07-07 | 1997-01-30 | Product Development Tayside Ltd. | Apparatus for measuring angles for mitres and bevels |
| FR2793018B1 (en) * | 1999-04-30 | 2001-07-13 | Rami Haidar | DEVICE FOR MEASURING AN ANGLE BETWEEN TWO PLANS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107101611A (en) * | 2017-05-03 | 2017-08-29 | 安徽信陆电子科技有限公司 | A kind of angle measurement unit and angle regulation method |
| CN107101611B (en) * | 2017-05-03 | 2024-04-09 | 安徽信陆电子科技有限公司 | Angle measuring device and angle adjusting method |
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Application publication date: 20160203 |