JPH0455517U

JPH0455517U -

Info

Publication number: JPH0455517U
Application number: JP9885990U
Authority: JP
Priority date: 1990-09-20
Filing date: 1990-09-20
Publication date: 1992-05-13

Description

[Brief explanation of drawings]

第１図は本考案になる容積式流量計の第１実施
例の構成図、第２図はケーシングの横断面図、第
３図は通常の流量計測時の検出信号の波形図、第
４図は変形例の横断面図、第５図は別の変形例の
横断面図、第６図は第２実施例の構成図、第７図
は回転子の逆回転検出時の検出信号の波形図、第
８図は第３実施例の構成図、第９図は異常検出時
の検出信号の波形図である。１……容積式流量計、２……ケーシング、３…
…計量室、４，５……回転子、８，９……回転軸
、１２，１３……磁石群、１７，１８……磁気セ
ンサ、２１……演算回路、２２……積算表示部、
２４，２５……多極磁石、２６……正逆判別回路
、２７……パルス欠落検出回路、２８……警報装
置。 Fig. 1 is a configuration diagram of the first embodiment of the positive displacement flowmeter according to the present invention, Fig. 2 is a cross-sectional view of the casing, Fig. 3 is a waveform diagram of a detection signal during normal flow measurement, and Fig. 4 is a cross-sectional view of a modified example, FIG. 5 is a cross-sectional view of another modified example, FIG. 6 is a configuration diagram of the second embodiment, and FIG. 7 is a waveform diagram of a detection signal when detecting reverse rotation of the rotor. , FIG. 8 is a configuration diagram of the third embodiment, and FIG. 9 is a waveform diagram of a detection signal at the time of abnormality detection. 1... Positive displacement flow meter, 2... Casing, 3...
...Measuring chamber, 4, 5... Rotor, 8, 9... Rotating shaft, 12, 13... Magnet group, 17, 18... Magnetic sensor, 21... Arithmetic circuit, 22... Integration display section,
24, 25... Multipolar magnet, 26... Forward/reverse discrimination circuit, 27... Pulse missing detection circuit, 28... Alarm device.

Claims

[Claims for Utility Model Registration] A casing having a measuring chamber between an inlet and an outlet, a pair of rotors provided in the measuring chamber and rotating in proportion to the flow rate of a fluid to be measured, a group of magnets disposed on an end surface of one of the rotors in the direction of the rotation axis substantially concentrically with the rotation axis;
A positive displacement flowmeter comprising: a sensor that is provided at a location facing the end face on which the magnet group is provided, and that detects the magnetic force of the magnet group and outputs a detection signal; a sub-magnet group disposed substantially concentrically with the rotation axis of the rotor on an end face in the direction of the rotation axis of one rotor; and a sub-magnet group provided at a location facing the end face on which the sub-magnet group is provided, , a sub-sensor provided to detect the magnetic force of the sub-magnet group and output a sub-detection signal when the sensor is not detecting the magnetic force of the magnet group; and both detection signals respectively output by the two sensors. A positive displacement flowmeter comprising: a calculation circuit that integrates the flow rate of the fluid to be measured and calculates the flow rate of the fluid to be measured.