JPH0469722U

JPH0469722U -

Info

Publication number: JPH0469722U
Application number: JP11267790U
Authority: JP
Priority date: 1990-10-26
Filing date: 1990-10-26
Publication date: 1992-06-19

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例である非円形歯車式
流量計のマグネツトと磁気センサの配置関係を示
す模式図、第２図はその非円形歯車式流量計を示
す拡大縦断面図、第３図は第２図の−線に沿
う平面断面図、第４図は磁気センサと吐出流量お
よび非円形歯車の回転角との関係を説明するため
の波形図、第５図はパルス信号を示す波形図、第
６図は磁気センサの回路構成図、である。第７図
は磁気センサを２個用いた実施例の配置関係を示
す模式図、第８図はその磁気センサの位置と吐出
流量との関係を説明するための特性図、である。
第９図は磁気センサを３個用いた実施例の配置関
係を示す模式図、第１０図はその磁気センサの位
置と吐出流量との関係を説明するための特性図で
ある。１……ギヤハウジング、２……作動室、３……
入口通路、４……出口通路、５……インレツトパ
イプ、６……アウトレツトパイプ、７……支軸、
８……非円形歯車、９……ボス部、１０……歯車
部、１１Ａ，１１Ｂ……マグネツト、１２……環
状溝、１３……シールリング、１４……プレート
、１５……凹所、１６Ａ，１６Ｂ，１６Ｃ，１６
Ｄ……磁気センサ、１７……ケース、１８……ボ
ルト、１９……ＯＲゲート、２０……計測装置。 Fig. 1 is a schematic diagram showing the arrangement relationship between a magnet and a magnetic sensor of a non-circular gear type flowmeter which is an embodiment of the present invention, Fig. 2 is an enlarged vertical sectional view showing the non-circular gear type flowmeter, Figure 3 is a plan sectional view taken along the - line in Figure 2, Figure 4 is a waveform diagram for explaining the relationship between the magnetic sensor, the discharge flow rate, and the rotation angle of the non-circular gear, and Figure 5 shows a pulse signal. The waveform diagram and FIG. 6 are circuit configuration diagrams of the magnetic sensor. FIG. 7 is a schematic diagram showing the arrangement relationship of an embodiment using two magnetic sensors, and FIG. 8 is a characteristic diagram for explaining the relationship between the position of the magnetic sensor and the discharge flow rate.
FIG. 9 is a schematic diagram showing the arrangement relationship of an embodiment using three magnetic sensors, and FIG. 10 is a characteristic diagram for explaining the relationship between the position of the magnetic sensor and the discharge flow rate. 1... Gear housing, 2... Working chamber, 3...
Inlet passage, 4... Outlet passage, 5... Inlet pipe, 6... Outlet pipe, 7... Support shaft,
8... Non-circular gear, 9... Boss portion, 10... Gear portion, 11A, 11B... Magnet, 12... Annular groove, 13... Seal ring, 14... Plate, 15... Recess, 16A , 16B, 16C, 16
D... Magnetic sensor, 17... Case, 18... Volt, 19... OR gate, 20... Measuring device.

Claims

[Claim for Utility Model Registration] A working chamber to which an inlet passage and an outlet passage through which the fluid to be measured flows are respectively connected, a pair of supporting shafts standing parallel to each other in the working chamber, and both supporting shafts. A non-circular gear type flowmeter comprising a pair of non-circular gears that are rotatably fitted and supported and meshed with each other, and a detection means for detecting rotation of at least one of the non-circular gears. The detection means includes a pair of magnets embedded in the non-circular gear at a distance from each other, and a plurality of magnets arranged on a plate covering the opening of the working chamber and generating pulses in response to the magnetism of each magnet. and a magnetic sensor, such that the output pulse generation interval of the magnetic sensor accompanying the rotation of the non-circular gear is proportional to the discharge flow rate.
A non-circular gear type flowmeter characterized in that each magnetic sensor and each magnet are arranged respectively.