Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

Electrical and Wave

Measuring-conduit-for-flow-rate-and-concentration-of-fluid

Drive circuit for power operation of a movable part of a vehicle coachwork

The problem which the invention seeks to overcome is to so improve the operating mechanism ...

Apparatus and method of anode power supply control during vertical retrace

The present invention provides an apparatus and method for controlling anode power supply output ...

Circuit arrangement for cyclic supply

We claim: 1. A control circuit for controlling an electromagnetic load in accordance with an input ...

Microcomputer for driving induction motor

The invention has been conducted in view of the above-described circumstances. It is an object of ...

Electronic control circuit

The invention therefore includes the provision of a control circuit for and a method of providing ...

Component for logic circuits and logic circuits equipped with this component

What I claim is: 1. A solid state component for logic circuit comprising integrated upon one and ...

Induction motor control apparatus

It is an objective of the present invention to overcome the disadvantages of the prior art ...

High-temperature storage battery

An object of the invention to provide a high-temperature storage battery with a cooling device ...

Voltage regulator with ferromagnetic filter

OF EMBODIMENT Referring to said drawing, this shows that the actual regulator is conventionally ...

Arrangement for the testing of high voltage direct current switches

We claim: 1. In a circuit for the synthetic testing of a high voltage direct current switch, which ...

Measuring conduit for flow rate and concentration of fluid

Details

Inventors: Ogura, Ichiro; Machida, Kaoru; Kurahashi, Muneshige;
Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP); Nihon Kohden Corporation (Tokyo, JP)
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:

A measuring conduit adapted for flow rate and concentration of a fluid for use in a measuring apparatus which measures both the flow rate of the fluid such as a respiratory gas containing a particular gas component, for example, carbon dioxide, using an ultrasonic wave and the concentration of the particular gas component in an optical manner. In order to simultaneously measure the flow rate and concentration and also to reduce the dead space of the measuring conduit, this measuring conduit comprises a single conduit member through which the fluid flows; a pair of ultrasonic transducers attached to the conduit member so as to face each other along a line slanted with respect to a flow direction of the fluid; and a pair of light transmitting windows airtightly provided in the wall of the conduit member between the ultrasonic transducers so as to face each other. One of the light transmitting windows introduces a light beam from an external light source into the conduit member. The other light transmitting window introduces the light penetrating the fluid flowing through the conduit member into a photo detecting element of the measuring apparatus.

DETAILED DESCRIPTION It is an object of the present invention to provide a measuring conduit which enables the simultaneous measurements of the flow rate of a fluid containing a measured component and the concentration of the component.
Another object of the invention is to provide a measuring conduit adapted to measure the flow rate of a respiratory gas and the concentration of a gas component in the respiratory gas with as little as possible dead space in order to lighten the burden of a patient.
Still another object of the invention is to provide a measuring conduit adapted to measure the flow rate of a respiratory gas and the concentration of a gas component in the respiratory gas without causing a substantial time difference between the measurements.
The present invention is applied to a measuring conduit which is adapted to measure the flow rate of a fluid in an ultrasonic measuring manner, and the concentration of a particular gas component in the fluid in an optical measuring manner.
The measuring conduit of the present invention comprises a single conduit through which a fluid flows; two ultrasonic transducers for measuring the flow rate of the fluid which are attached to the conduit so as to face each other along a line slanted with respect to the flow direction of the fluid; and a pair of light transmitting windows which are airtightly provided in walls of the conduit positioned between the ultrasonic transducers so as to face each other.
One of the light transmitting windows introduces light from an external light source into the conduit, and the light transmitted through the fluid flowing through the conduit goes through the other light transmitting window and into a photo detecting element in an external concentration measuring apparatus.
Preferably, the two ultrasonic transducers and the two light transmitting windows are arranged so that the crossing point of the central line of the axis of the conduit and the central line of the ultrasonic beam which is transmitted and received between the ultrasonic transducers coincides with the central line of the light beam which passes through the pair of light transmitting windows

Related patents

	Apparatus for measuring amount of ultrafiltrate and concentration of receiving solvent in dialysis Any of the conventional method for determining an amount of the ultrafiltrate and a concentration of the receiving solvent has the problems described above, and ...
	Apparatus for measuring the flow rate of electrically conductive liquids I claim: 1. Apparatus for measuring the flow rate of electrically conductive liquids, comprising two coils disposed in succession as seen in the flow direction of a ...
	Apparatus for measuring magnetic particles suspended in a fluid based on fluctuations in an induced voltage The invention generally features an apparatus for detecting magnetic particles suspended in a liquid, the apparatus comprising: a source of an electrical signal; a first ...
	Battery charging system having remotely located charging units OF THE PREFERRED EMBODIMENT While the specification concludes with claims defining the features of the invention that are regarded as novel, it is believed that the ...
	Ozonizer feeding device Accordingly, the objects of this invention are to provide a novel ozonizer feeding device which permits an increase in the ozone output and thus an economical ozone ...
	Electrochemical storage device The invention relates to an electrochemical storage device of the type having a plurality of serially connected cells, in which each has two spacially separated ...
	Recharging method and temperature-responsive overcharge protection circuit for a rechargeable battery pack having two terminals The present invention is particularly designed and adapted to solve the above-noted problems by providing an overcharge protection circuit for a rechargeable battery ...
	Composite metal oxide material It is, therefore, an object of the present invention to provide a composite material having a Y123 metal oxide crystal layer grown on a thin Y123 metal oxide film and ...
	Method of measuring the parameters of a resonator I claim: 1. A method of measuring parameters including resonant frequency of a resonator, which includes: installing the resonator to be measured in a testing jig which ...
	Motor control circuit with automatic restart of cut-in FIG. 2 shows a control circuit 10 for use with a single phase AC induction motor having a main winding 1 and an auxiliary winding 2 both connectable to an AC power ...

0.064
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved