FLOW RATE MEASURING APPARATUS - 株式会社リコー

Title:

FLOW RATE MEASURING APPARATUS

Document Type and Number:

Japanese Patent JP3771069

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a flow rate measuring apparatus suitable for driving from a battery power supply.
SOLUTION: A flow rate measuring apparatus comprises a first temperature- sensitive resistor Rs1 disposed in the fluid, and a second temperature-sensitive resistor Rs2 disposed in the fluid in the downstream of the first resistor Rs1. A first power supply I1 supplies a constant current to the first temperature- sensitive resistor Rs1 and a second power supply I2 supplies an identical constant current to the second temperature-sensitive resistor Rs2. Switches S1, S2 connect a capacitor C1 between one ends a, b of the first and second resistors Rs1, Rs2 or disconnect the capacitor C1. The other ends of the first and second resistors Rs1, Rs2 are brought to an identical potential.

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Inventors:

Shinichi Suzuki

Application Number:

JP34857398A

Publication Date:

April 26, 2006

Filing Date:

December 08, 1998

Export Citation:

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Assignee:

株式会社リコー
リコーエレメックス株式会社

International Classes:

G01F1/68; G01F1/696; (IPC1-7): G01F1/68

Domestic Patent References:

JP8105780A
JP10281833A
JP7063588A
JP6117899A

Attorney, Agent or Firm:

Tadahiko Ito

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