JPS6138995A - Measurement for counting scale ascent errors caused by stopping string - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for pressing the strings of a fretted instrument.
In order to express the pitch rise error value that occurs as an objective numerical value, the purpose is to measure the "count that produces a one-cent error" which is the basic numerical value.

What is the numerical value of the error value caused by string pressing?

It is extremely difficult to measure because there are many uncertainties in calculations (causing variations in error values caused by differences between instruments and strings, and between manufacturers and users), and the differences in string tension and weight due to string pressing are extremely small. It is not possible to apply the formula for calculating the frequency, and it is considered impossible to express the error + i for each string in full numerical value, and it has reached 1\, which is unresolved to this day. For this reason, there are currently no instruments that can be said to have an accurate average frequency pitch using a fret percentage instrument.

Non-invention is the basic numerical value for solving these problems.

This is a method of measuring the error count for each string, and the rotation angle of the Tsutsumi Shinzen (Fig. 1) required for a half-π rise is measured as accurately as possible.

FIGS. 1 to 10 show an example of a non-inventive classical guitar. FIG. 2 is an explanatory diagram of measurement implementation of pitch error value counting according to the rotation angle of the Tsukami Shinzen (FIG. 2).

Figures 1 to 7 show the "tsumami" at the bottom of knob 8zen (2).
(Fig. 2 and 3) is an explanatory diagram for measuring the rotation angle.

The measuring instrument is a "knob" that does not cause any error in the angle.
3) Make a cover (Fig. 3, 4), and fix a 1 m long, unbendable needle-like wire (Fig. 3, 5) on the center of rotation on the bottom of the cover. This measuring instrument (4) There is a knob (3) that can be easily attached and detached.

The present invention is intended to solve the problem of f-range error during performance, and to eliminate uncertainties, all strings are tuned to a specified pitch.

The angle is measured by the two lines indicated by the angle needle bar (5) when the measured string reaches a specified pitch and at each point in time when the string rises by a further semitone.

Since the wound and angle recording is repeated, a measuring table (Fig. 4, 6) is required to prevent fluctuations in the recording position tIt.

The measurement table (6) has a measurement angle recording plate (Fig. 4, 7).

Recording plate angle alignment @CW, 4 Figure 8, instrument head support (
(Fig. 4, 9), a stopper at the bottom of the instrument (wall part of Fig. 4, 10J). For measurement, as shown in Fig. (4) so that they are parallel to each other at the intervals when they are installed, use the angle adjustment lever (8).The center line (6th
Figure 11) (Figure 7, Figure 13) is attached.

Align it with the center line marked on the instrument (Fig. 6, 12) (Fig. 7, 14).

Figures 8 to 10 show Tsumamishinzen (2) upper head [1st θ]
FIG. 20) is an explanatory diagram of a measuring instrument (G) that can be freely connected and detached. It is equipped with the main parts of the angle pointer (FIG. 9, 17) fixed to the measuring instrument core Wi (FIG. 9, 16) and the angle indicator board (FIGS. 8 and 9, 18) that is not fixed to the core 1tIC1l. Tighten the screw at the bottom of the core rod (Fig. 10, 19) to
It is connected and fixed to the screw hole (Fig. 10, 20) made in the upper part of Fig. 2.

Angle pointer (b) when adjusting to the specified pitch for measurement
of.

The angle can be easily measured by setting the angle indicator (G) to 0, fixing it to the indicator board's T-system head with the tip 1, and then using the angle of the pointer (B) shown when rising by a semitone. This measuring instrument CLII has the advantage of not requiring a measuring stand (6), but the measuring knob core IiI had to be specially manufactured, and a part of the string-wound gear was sealed on the back side of the instrument head. Steel guitars have drawbacks that cannot be measured.

When making the above measurements, pay attention to the four primary points.

h) To avoid bad strings, use a modified caliper cage or thickness gauge to measure the first string, and reduce the error by 2/10.
The effective strings are within II1.

(B) Influence on measurement In order to keep the string length constant, we will consider a method of wrapping the extra string that has passed through the 8-hole hole (Figure 2, 24) around the tensioned part (Figure 2, 21) on the first string. However, depending on the 1st string AT type, errors may occur in the tracing, so ideally the string length fixing device shown in Figures 11 to 13 (Figure 11
If you use 2), you can get accurate measurements. The outer diameter of the lower part of the fixing tool (Fig. 11, 23) is thicker than the string passage hole (Fig. 11, 25) of the string core @C, Fig. 11, 24, and the thickness gradually becomes thinner from the center toward the tip. The outer diameter (FIG. 11, 26) is smaller than the string passage hole (c). The tip is petal-shaped (Fig. 11, 27), and when tension is applied to the string (Fig. 13, 28), the petal-shaped tip is inserted inside the diameter of the first string passing hole (C) (Fig. 13, 30). closes and "crimps" the first string (Fig. 13, 3)
0) to fix the string (G) → Measure after the string is stable (no natural fluctuations in pitch occur within the time required for measurement) ○) In the winding direction of the string,
Carefully turn the "knob" little by little. Be sure to not include rotation in the opposite direction in the measurement.

In addition to this, it is recommended to measure temperature and humidity using the annual average values.

It was measured using the method described above. Based on the angle of ``Tsumami Shinzen,'' which praises semitone rise, it is possible to calculate ``a string elongation count that causes a 1-cent error'' using a first-order method.

A. String winding core 1#! Diameter D・String extension value for 1 rotation of core Wi・Number of gears D÷El−F'S'・Extension value for 1 rotation of knob F÷360 degrees−〇 G・String expansion value for 1 degree of knob H・Angle of semitone rising knob GXH-1 - String elongation value caused by semitone rise - Equation divided by 100-, TJ - The formula for calculating the string elongation value caused by 1 cent error is summarized.

The most popular classical guitar. guitar strings
``Knobs'' required to raise the semitone of ``Augustine Blue Label''
The angle of is as follows.

1st string, 2nd string, 3rd string, 4th string, 5th string, 6th string.

247° 214° 174° 299° 282°
240°C The above value is the average value of 5 measurements. )
The rotation angle [in an effective string] indicates the same number or a very approximate value; strings with noticeable differences in numerical values are caused by tension, and the measuring method of the present invention can also identify defective strings. It is something.

From this angle, it is clear that for the two types of different materials, in order of thickness, nylon single wire strings have a greater influence on errors than metal wound strings. Using the above calculation formula, the elongation count of each string that causes a 1 cent error for Augustine strings is as follows: A = 10 m - E = 14 strings (all manufacturers,
Same standard) 1st string -B+ -0,66m Jl
= 0.01641111 2nd string, B2-0.78
III, 72-0.01441111 3rd string, B3
= 0.98 tm J3,000 0.0119 4th string, B4 = 0.730 J4 = 0.
0200! 5th string - B5 = 0.91 fight,
y5 = 0.0192th string, B6-1.09
m J6 = 0.0166 dragon count (Jl
If the string elongation value depending on the pressing of each string is calculated using "trigonometry" based on "t", the error value can be accurately expressed numerically.

[Brief explanation of drawings]

Figure 1: Reference diagram of the measurement angle of the present invention. Figure 2: Reference diagram of the main parts of the string winding. FIG. 3: A perspective view and an exploded view of the measuring instrument of the present invention. Figure 4: Reference diagram of the main parts of the measuring table. FIGS. 5 to 7 are measurement state diagrams of the present invention. Figures 8 and 9: Diagram of the uninvented measuring instrument in use. FIG. 10: A sectional view of the measuring instrument of the present invention in use. FIG. 11 is a reference diagram of the main parts of the chord length fixing device of the present invention. Figures 12 and 13 are diagrams showing the state of the chord length fixing device of the present invention in use. (1)　　　　　　　　　1　8　Zen semitone rising angle. (2) 1. Mi8 Zen. (3) Knobs. (4) A housing angle measuring instrument of the present invention. (5) Needle bar of measuring instrument. (6) Measurement stand. (7) Angle recording plate. (8) Angle adjustment rod for the plate. (9) Instrument head support. a, u Head post and stopper position mark line. 4. An instrument for measuring the upper part of the head with an inventive knob. (g) Core Zen of measuring instruments. (b) Angle pointer of measuring instrument. a) Angle indicator board for measuring instruments. (2) Screw at the bottom of the measuring instrument core. (a) Screw hole on the upper head of the knob core Zen. (c) Crossing of strings. @Uninvented string length fixing device. @ Outer diameter of chord length fixture. (c) Tsurumaki Shinzen. (c) Inner diameter of the string passage hole of the Tsurumaki Shinzen. (E) Outer diameter of the petal-shaped tip of the chord length fixture. Of course, the upper petal of the chord length fixing device. (c) Strings. (Support) String tension direction〇 (To) Fixed position of the string. Patent applicant Nobu Hirano Figure 1 Figure 3

Claims (4)

[Claims] (1) String-wound core rod (24) applying pi (24) The half-tone rise obtained by measuring the angle required for the knob core rod (2) to rise by a half-tone relative to the length of the string required for one rotation. A measurement method that obtains a string elongation value count that has an error of 1 cent as a percentage of the required string elongation value. (2) Attach the knob (2) to the lower knob (3).
An angle measuring instrument according to claim 1, which is freely removable and has a needle bar (5) fixed to the bottom that indicates the angle of the knob (
4). (3) Crafted on the knob core (2) upper head (20),
A measuring instrument (15) that can be freely connected to and detached from a screw hole, and has an angle pointer (17) fixed to a core rod (16) of the measuring instrument and an angle indicator board (18) that can freely rotate. Angle measuring instrument (15) according to item 1. (4) The inside of the string passing hole in the string-wound core rod (24) (
At 25), the petal-shaped tip (27) closes and "crimps" the string.
Chord length fixing device (22) according to claim 1, characterized in its action.