CN211000660U - Semi-logarithmic coordinate scale - Google Patents
Semi-logarithmic coordinate scale Download PDFInfo
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- CN211000660U CN211000660U CN201922131171.9U CN201922131171U CN211000660U CN 211000660 U CN211000660 U CN 211000660U CN 201922131171 U CN201922131171 U CN 201922131171U CN 211000660 U CN211000660 U CN 211000660U
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Abstract
A semilogarithmic coordinate scale comprises a first scale, a second scale and a hinged shaft, wherein the first scale is as long as the second scale, one side end of the first scale is hinged with the hinged shaft, scales are arranged on two sides of the first scale and the second scale, and the scale marks on the two sides are in opposite sequence; the division values of the scales on the two sides of the first graduated scale are the same, and the measuring ranges are the same; the division values of the scales on the two sides of the second graduated scale are the same as the measuring range, and the division values are logarithmic values and are distributed according to a logarithm taking 10 as a base. When the first graduated scale rotates to a position of 90 degrees, the first graduated scale is used for drawing a longitudinal axis of a semi-logarithmic coordinate system and marking the longitudinal coordinate; the second scale is in a horizontal position for drawing the horizontal axis of the semi-logarithmic coordinate system, which may be marked with evenly distributed horizontal axes at lgx. The utility model has the advantages that: the meaning uniformly distributed according to lgx can be visually and intuitively known, a semilogarithmic coordinate system can be quickly and accurately established, a logarithmic frequency characteristic diagram in engineering can be drawn, and the method can be recycled.
Description
Technical Field
The utility model relates to a study article, especially a semilogarithmic coordinate scale.
Background
When a student of a professional related to electrical or control engineering analyzes the performance of a control system, a graphical method is adopted to draw a logarithmic frequency characteristic diagram in order to know the influence of parameter change on the system performance and facilitate analysis, design and correction of the system.
The logarithmic frequency characteristic diagram is drawn on a special coordinate paper having a bisector coordinate on the vertical axis and a logarithmic coordinate on the horizontal axis, that is, "semilogarithmic coordinate paper". However, semi-log paper is not very common and requires additional purchase. If the graduated scale can be used for accurately and beautifully drawing a semilogarithmic coordinate system and has the function of a common graduated scale, the cost is saved, and the graduated scale is favorable for students to learn.
Disclosure of Invention
An object of the utility model is to provide a semilogarithmic coordinate scale to solve traditional stationery can not be convenient, swift draw semilogarithmic coordinate system, lead to the not pleasing to the eye of the logarithm frequency characteristic graph of drawing, the technical problem of frequency nonstandard.
The utility model adopts the technical proposal that: the device consists of a first graduated scale, a second graduated scale and a hinged shaft; the first graduated scale and the second graduated scale are the same in length, one side end of the first graduated scale is connected with the second graduated scale through a hinged shaft, scales are arranged on two sides of the first graduated scale and the second graduated scale, and the scale mark sequence of the two sides of the first graduated scale and the scale mark sequence of the two sides of the second graduated scale are opposite; the division values of the scales on the two sides of the first graduated scale are the same, and the measuring ranges are the same; the division values of the scales on the two sides of the second graduated scale are the same as the measuring range, and the division values are logarithmic values which are distributed according to a logarithm with a base of 10; a clamping groove matched with one side edge of the second graduated scale is arranged on one side edge of the first graduated scale.
Furthermore, the first graduated scale and the second graduated scale can both rotate by 0-180 degrees, and when the first graduated scale and the second graduated scale rotate to 0 degree, the second graduated scale can be placed in the clamping groove of the first graduated scale and coincide with the first graduated scale.
After the structure is adopted, the scales of the second graduated scale are uniformly distributed according to lg x, namely x is changed by 10 times, and lg x is changed by one unit length. When the first graduated scale and the second graduated scale are in horizontal positions, a lengthened straight line with scales can be drawn. When the first graduated scale rotates to a position of 90 degrees, the first graduated scale with uniformly distributed graduations is in a vertical position and is used for drawing a longitudinal axis of a semi-logarithmic coordinate system and marking the longitudinal coordinate; the second graduated scale is in the horizontal position, is used for drawing the horizontal axis of the semilogarithmic coordinate system, can mark the horizontal axis according to lg x even distribution.
The utility model has the advantages that:
1. the utility model discloses novel structure, rational in infrastructure, processing are simple and convenient, low cost, convenient to use can understand according to lg x evenly distributed's meaning visually, makes things convenient for the learner to master the knowledge of semilogarithmic coordinate.
2. By means of the utility model discloses, the logarithm frequency characteristic graph in the engineering is conveniently drawn to the half-logarithm coordinate system of establishment that can be quick accurate, can replace the function of half-logarithm coordinate paper, and circulated use.
3. The utility model discloses carry, deposit the convenience, when carrying, depositing, can with second scale and first scale fifty percent discount, make the second scale card put in the draw-in groove of first scale can.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a schematic view of the first scale groove structure of the present invention.
Description of reference numerals: 1. first scale, 2, second scale, 3, articulated shaft, 4, first scale, 5, second scale, 6, draw-in groove.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 and 2, a semilogarithmic coordinate scale comprises a first scale 1, a second scale 2 and a hinge shaft 3, wherein the first scale and the second scale have the same length, one side end of the first scale is connected with the hinge shaft through the hinge shaft, scales are arranged on two sides of the first scale and the second scale, and the scale marks on the two sides of the first scale and the second scale are in opposite sequence; the division values of the scales 4 on the two sides of the first graduated scale are the same, and the measuring ranges are the same; the division values and the measuring ranges of the scales 5 on the two sides of the second graduated scale are the same, and the division values are logarithmic values and are distributed according to a logarithm with a base 10; a clamping groove 6 matched with one side of the second graduated scale is arranged on one side of the first graduated scale.
Furthermore, the first graduated scale and the second graduated scale can both rotate by 0-180 degrees, and when the first graduated scale and the second graduated scale rotate to 0 degree, the second graduated scale can be placed in the clamping groove of the first graduated scale and coincide with the first graduated scale.
When the scale is rotated to a 90-degree position, the first graduated scale can draw a longitudinal axis and mark uniform scales, and the second graduated scale draws a transverse axis and marks a transverse coordinate of 'uniformly distributed according to lg x'. When the scale is used, a pen can be used for drawing along the edge of the scale, and corresponding coordinates are marked according to the scales, so that the drawing of semilogarithmic coordinates can be completed; when the first graduated scale and the second graduated scale are positioned at the same horizontal position, a lengthened straight line can be drawn.
The above, only be the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and all the technicians familiar with the technical field are in the technical scope of the present invention, according to the technical scheme of the present invention and the concept of the present invention equivalent replacement or change should be covered within the protection scope of the present invention.
Claims (2)
1. The utility model provides a semilog coordinate scale comprises first scale, second scale and articulated shaft, its characterized in that: the first graduated scale and the second graduated scale are the same in length, one side end of the first graduated scale is connected with the second graduated scale through a hinged shaft, scales are arranged on two sides of the first graduated scale and the second graduated scale, and the scale mark sequence of the two sides of the first graduated scale and the scale mark sequence of the two sides of the second graduated scale are opposite; the division values of the scales on the two sides of the first graduated scale are the same, and the measuring ranges are the same; the division values of the scales on the two sides of the second graduated scale are the same as the measuring range, and the division values are logarithmic values which are distributed according to a logarithm with a base of 10; a clamping groove matched with one side edge of the second graduated scale is arranged on one side edge of the first graduated scale.
2. A semi-logarithmic scale according to claim 1, wherein: the first graduated scale and the second graduated scale can rotate by 0-180 degrees, and when the first graduated scale and the second graduated scale rotate to 0 degree, the second graduated scale can be arranged in the clamping groove of the first graduated scale and is overlapped with the first graduated scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922131171.9U CN211000660U (en) | 2019-11-22 | 2019-11-22 | Semi-logarithmic coordinate scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922131171.9U CN211000660U (en) | 2019-11-22 | 2019-11-22 | Semi-logarithmic coordinate scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211000660U true CN211000660U (en) | 2020-07-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922131171.9U Active CN211000660U (en) | 2019-11-22 | 2019-11-22 | Semi-logarithmic coordinate scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211000660U (en) |
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2019
- 2019-11-22 CN CN201922131171.9U patent/CN211000660U/en active Active
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