Abstract: A flowmeter having a seal structure for preventing an inner case structure from becoming complicated and making it possible to easily assemble an inner case with an outer case even if an inflow port has a large diameter. A seal member including a pair of sheet members each having a circular opening provided in a central part and a protruding ring formed along the outer peripheral edge of the opening in a protruding shape that projects outward is inserted between the inner peripheral surface of a body case of an outer case and the outer peripheral surface of an inner case. The protruding rings of the seal member are pressed by the inner peripheral surface of the body case of the outer case, seal the space between the outer case body part and the inner case, and prevent the leakage of fluid flowing through a flowmeter.

Abstract: An electromagnetic flowmeter includes a flow path housing having a measurement flow path; a pair of electrode accommodating holes formed in the flow path housing and communicating with the measurement flow path in a direction intersecting a magnetic field; a pair of sensing electrodes fitted in the pair of electrode accommodating holes; a seal member providing a seal between an inner surface of each electrode accommodating hole and an outer surface of each of the sensing electrodes; a submersion distal-end part of each sensing electrode located closer to the measurement flow path than the seal member; a pair of submersion chambers that are parts of the pair of electrode accommodating holes each located closer to the measurement flow path than the seal member and accommodating the submersion distal-end part.

Abstract: An electromagnetic flowmeter includes: a resin flow path housing; a pair of porous electrodes made of a porous conductor and embedded in the flow path housing; a pair of electrode opposing surfaces provided in the pair of porous electrodes; a pair of electrode accommodating holes extending from an outer face of the flow path housing and connecting to the pair of porous electrodes; a pair of solid electrodes accommodated in the pair of electrode accommodating holes; porous-side connecting parts and solid-side connecting parts respectively formed in the porous electrodes and the solid electrodes to fit and electrically connect with each other; a pair of sensing electrodes formed of the pair of solid electrodes and the pair of porous electrodes; and seal members that seal gaps respectively between the solid electrodes and the electrode accommodating holes.

Abstract: A flowmeter having a seal structure for preventing an inner case structure from becoming complicated and making it possible to easily assemble an inner case with an outer case even if an inflow port has a large diameter. A seal member including a pair of sheet members each having a circular opening provided in a central part and a protruding ring formed along the outer peripheral edge of the opening in a protruding shape that projects outward is inserted between the inner peripheral surface of a body case of an outer case and the outer peripheral surface of an inner case. The protruding rings of the seal member are pressed by the inner peripheral surface of the body case of the outer case, seal the space between the outer case body part and the inner case, and prevent the leakage of fluid flowing through a flowmeter.

Abstract: A base (41) includes a plurality of flow channels (33, 34) and detection sections (531, 541) for detecting the flow volumes of fluids flowing in the flow channels (33, 34). In the base (41), a blocking section (57) for blocking heat conduction between the flow channels (33, 34) is provided between the flow channels (33, 34). The blocking section (57) is configured of groove (58) formed in the base (41).

Abstract: A base (41) includes a plurality of flow channels (33, 34) and detection sections (531, 541) for detecting the flow volumes of fluids flowing in the flow channels (33, 34). In the base (41), a blocking section (57) for blocking heat conduction between the flow channels (33, 34) is provided between the flow channels (33, 34). The blocking section (57) is configured of groove (58) formed in the base (41).

Abstract: A water bike equipped with a speed meter wherein a speed meter sensor 1 including a coil for generating a magnetic flux and electrodes disposed at positions vertical to both flowing direction of a fluid and direction of the magnetic flux, and for measuring the speed of the water bike on water by the value of electromotive force generated by an electromagnetic induction operation, is fitted to a submerged portion of the water bike 2.

Abstract: An electromagnetic flow meter which calculates the electric conductivity of a fluid based on the ratio of an output signal generated when electrodes are grounded through short-circuit resistors Rs.sub.1, Rs.sub.2 to an output signal generated when the electrodes are not grounded, and more accurately corrects a flow measurement using the electric conductivity, characterized in that, for reducing measurement errors due to fluctuation in DC offset voltage accompanied by an on/off operation of the short-circuit switch S1, outputs are measured when the short-circuit switch S1 is on and off in a magnetization state, the output are next measured when the short-circuit switch S1 is on and off in a non-magnetization stage, and the outputs in the non-magnetization state are subtracted from the outputs in the magnetization state, thereby removing the influence of "DC offset voltage fluctuation" occurring accompanied by the on/off operation of the short-circuit switch S1.

Abstract: An electromagnetic flow meter capable of measuring the flow of a fluid flowing through a conduit irrespective of whether the conduit is full of the fluid. A ratio of the output of a sensor disposed on the side of the conduit and obtained when a coil disposed above the conduit is energized to the output of the sensor obtained when a coil disposed below the conduit is energized is always a function of only the level of the fluid in the conduit. Therefore, if a first relationship between the ratio and the level of the fluid is beforehand obtained for a reference conduit, the level can be specified even if a gradient of the conduit changes. Since the level and flow are in a one-to-one relationship in the reference conduit, a second relationship between the sensor output and flow or level of the fluid obtained when the upper coil is energized, should beforehand be obtained. If the ratio is obtained for the measured conduit, the level of the fluid is determined.

Abstract: A pair of electrodes and a pair of magnetic poles are mounted to a resin-made conduit body with each of those parts partly exposed to the lumen. The magnetic poles are formed by an electrically conductive material and serve also as ground electrodes by being connected to ground. The magnetic poles serving also as the ground electrodes are positioned in the same plane as signal electrodes with a result that the distance on the axis of the conduit between the signal electrodes and the ground electrodes is fixed, more precisely, the distance is zero, so that the zero point of the electromagnetic flowmeter is stabilized. The magnetic poles, mounted to the conduit body, are separated from the yokes on which coils are wound, and both the magnetic poles and the yokes are detachable.

Abstract: An electromagnetic flow meter capable of measuring the flow of a fluid flowing through a conduit irrespective of whether the conduit is full with the fluid or not. A ratio of the output of a sensor disposed on the side of the conduit and obtained when a coil disposed above the conduit is energized to the output of the sensor obtained when a coil disposed below the conduit is energized is always a function of only the level of the fluid in the conduit. Therefore, if a first relationship between the ratio and the level of the fluid is beforehand obtained for a reference conduit, the level can be specified even if a gradient of the conduit changes. Since the level and flow are in a one-to-one relationship in the reference conduit, a second relationship between the sensor output and flow or level of the fluid obtained when the upper coil is energized, should beforehand be obtained. If the ratio is obtained for the measured conduit, the level of the fluid is determined.

Abstract: A non-full state detecting apparatus comprises an upper excitation coil disposed above the conduit, a lower excitation coil disposed below the conduit, a sensor provided on the side of the conduit for producing an output corresponding to the fluid when each of the coils is excited, a device for exciting both the upper and lower coils, a device for exciting any one of the upper and lower coils, a comparator for comparing a first output from the sensor produced when both the coils are excited and a second output from the sensor produced when any one of the coils is excited, and a device for determining from the result of the comparison by the comparator whether the conduit is full of the flow flowing therethrough. The excitation of both the upper and lower coils renders uniform a magnetic flux distribution in the conduit to thereby achieve detection without an error.

Abstract: A fluidic gas meter including a flow path structure provided with a fluidic element, a cut-off valve, a pressure switch, a flow sensor, a piezoelectric film sensor, an electronic circuit unit, and a wiring board serving as a mother board and having a function of lead wires. Each of the cut-off valve, the pressure switch, the flow sensor and the piezoelectric film sensor are fixed to the flow path structure. The electronic circuit unit is made up of a counter board and a control circuit board. The counter board is mounted with an electronic circuit for counting up flow-rate signals from the flow sensor and the piezoelectric film sensor and a liquid crystal display device for displaying the amount of gas consumed.

Abstract: A fluidic flowmeter is located downstream of a valve. A wire gauze or net having small meshes is located on the upstream side of a nozzle forming the inlet to the fluidic element to stabilize flow.

Abstract: In an electromagnetic flowmeter one of two electrodes mounted on a measuring pipe is impressed with an electrical pulse synchronous with the switching of an excitation currrent, thereby detecting the voltage drop across the electrical resistance of a fluid, such that both the conductivity and the flow rate of the fluid are measureable at the same time.

Abstract: In magnetic induction flow measurement in which a flow rate of a fluid is measured by a DC magnetic field having a periodically reversed polarity, an apparatus is used to compensate a DC offset voltage generated in an amplifying circuit in an electromagnetic flowmeter in which a signal voltage produced across electrodes is sampled and stored in each of a pair of sampling periods where the magnetic field takes a positive polarity and a negative polarity, respectively. A difference between the sampling values is formed as an output signal voltage. The signal voltage is sampled and stored in a compensation period following the pair of sampling periods to produce a compensation voltage to be superimposed onto the signal voltage, and compensation is made on the signal voltage by using the compensation voltage which is held until a succeeding compensation period.

Abstract: A calorimeter using a remanence type electromagnetic flowmeter includes a core made of a semi-hard or hard magnetic material and having a property in which a remanent magnetic flux density is varied in proportion to a temperature, a coil excited intermittently to magnetize the core, a metallic pipe forming a fluid path, a yoke for conducting remanent magnetic flux of said core, the yoke being fixed to the outer surface of the metallic pipe in close contact therewith without forming an air gap therebetween, and a pair of electrodes attached to the inner surface of the metallic pipe through an insulator.

Abstract: The invention relates to improvement of a motor with a rotor including a permanent magnet. The motor comprises a yoke of soft magnetic material, a plurality of field poles each having a field core of semi-hard magnetic material and a pole piece of soft magnetic material, a plurality of coils wound around the field cores respectively, and a rotor including a permanent magnet. In this constitution, utilizing action of the minor loop of the field cores of semi-hard magnetic material, the residual magnetic flux density of the plurality of field cores is controlled in sequence and the shifting magnetic field is induced thereby the magnetic poles of the rotor are attracted in sequence so as to move the rotor.