JPS6427620U

JPS6427620U -

Info

Publication number: JPS6427620U
Application number: JP12179887U
Authority: JP
Priority date: 1987-08-07
Filing date: 1987-08-07
Publication date: 1989-02-17

Description

[Brief explanation of the drawing]

第１図は本考案の構成を例示するブロツク図、
第２図は本考案に係る内容積測定装置の一実施例
を示す要部構成図、第３図は共鳴周波数と音圧と
の関係を示すグラフ、第４図は共鳴周波数と内容
積との関係を示すグラフ、第５図は実施例の電子
制御回路によつて実行される操作処理のフローチ
ヤート、第６図は位相差により共鳴周波数を求め
る場合の要部構成図、第７図は共鳴周波数と内容
積との関係を示すグラフを表わす。１……マスタ容器、２……第１音波発生器、３
……第１音圧センサ、４……第１ヘルムホルツ共
鳴器、５……被測定物、６……第２音波発生器、
７……第２音圧センサ、８……第２ヘルムホルツ
共鳴器、９……電子制御回路（演算制御手段）。 FIG. 1 is a block diagram illustrating the configuration of the present invention.
Fig. 2 is a diagram showing the main parts of an embodiment of the internal volume measuring device according to the present invention, Fig. 3 is a graph showing the relationship between resonance frequency and sound pressure, and Fig. 4 is a graph showing the relationship between resonance frequency and internal volume. A graph showing the relationship, FIG. 5 is a flowchart of the operation process executed by the electronic control circuit of the embodiment, FIG. 6 is a main part configuration diagram when determining the resonance frequency by phase difference, and FIG. 7 is a diagram showing the resonance frequency. A graph showing the relationship between frequency and internal volume is shown. 1... Master container, 2... First sound wave generator, 3
... first sound pressure sensor, 4 ... first Helmholtz resonator, 5 ... object to be measured, 6 ... second sound wave generator,
7... Second sound pressure sensor, 8... Second Helmholtz resonator, 9... Electronic control circuit (arithmetic control means).

Claims

[Claims for Utility Model Registration] At least one master container with a known volume, a first Helmholtz resonator in which the master container is installed, and a first sound wave with a variable frequency provided at a predetermined position of the first Helmholtz resonator. a generator, a first sound pressure sensor provided at a predetermined position of the first Helmholtz resonator, a second Helmholtz resonator in which an object to be measured is installed, and a frequency provided at a predetermined position of the second Helmholtz resonator. a variable second sound wave generator; a second sound pressure sensor provided at a predetermined position of the second Helmholtz resonator; and a sound wave emitted by the first sound wave generator of the first Helmholtz resonator in which the master container is installed. Adjust the frequency and find the resonant frequency of the master container from the relationship between the frequency of the sound wave and the output of the first sound pressure sensor,
The frequency of the sound wave emitted by the second sound wave generator of the second Helmholtz resonator in which the object to be measured is installed is adjusted, and the resonant frequency of the object to be measured is determined from the relationship between the frequency of the sound wave and the output of the second sound pressure sensor. calculation control means for calculating the internal volume of the object to be measured from the resonant frequency of the master container and the resonant frequency of the object to be measured;
An internal volume measuring device comprising: