Abstract A gas-rate sensor is disclosed which comprises, similar to a conventional one, a hollow cylindrical casing with a gas sealed therein, a gas pump arranged within the casing at its one end to circulate the gas therein, a nozzle means arranged within the casing at its other end to inject the gas as a gas flow therein, and a pair of thermosensitive elements disposed inside the casing so as to be exposed to the gas flow, whereby when the casing is applied an angular velocity the gas flow is deflected to cool the two thermosensitive elements unequally causing a difference in electric resistance between them, the measurement of the difference in resistance making it possible to detect the angular velocity, and which is characterized in that a heater plate is disposed within the casing so as to directly heat the gas circulated therein in order to compensate for the influence of the outside temperature on the accuracy of the measurement of the angular velocity instead of heating the casing from its outer periphery by the wound heating wires as is usual in a conventional sensor to achieve the same object, the present invention allowing much earlier and more stable heating of the sealed gas than in a conventional one.
Inventors
👤 Yasunobu Katsuno
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-02 09:33
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
206 words
In a gas-rate sensor having a sealed hollow cylindrical casing with a hollow cylindrical space being coaxially formed therein, a gas pump arranged within said casing at one end of said cylindrical space to generate a gas flow therein, a nozzle means arranged within said casing at the other end of said cylindrical space so as to inject said gas flow into said cylindrical space as a gas jet, and a pair of thermosensitive elements arranged within said cylindrical space near said one end thereof so as to be subjected to said gas jet, whereby when said casing is applied an angular velocity input said gas jet is forced to be deflected relative to said casing so that said thermosensitive elements are unequally cooled, causing change in electrical resistance proportional to said angular velocity input between said pair of thermosensitive elements, and said angular velocity being allowed to be detected by the measurement of said temperature difference, the improvement wherein: said hollow cylindrical space of said hollow cylindrical casing being provided with a heater plate therein to directly heat said gas sealed within said casing so that said thermosensitive elements can be heated to a predetermined temperature by said heated sealed gas within a short time.
Claim 2
Dependent Claim
206 words
In a gas-rate sensor having a sealed hollow cylindrical casing with a hollow cylindrical space being coaxially formed therein, a gas pump arranged within said casing at one end of said cylindrical space to generate a gas flow therein, a nozzle means arranged within said casing at the other end of said cylindrical space so as to inject said gas flow into said cylindrical space as a gas jet, and a pair of thermosensitive elements arranged within said cylindrical space near said one end thereof so as to be subjected to said gas jet, whereby when said casing is applied an angular velocity input said gas jet is forced to be deflected relative to said casing so that said thermosensitive elements are unequally cooled, causing change in electrical resistance proportional to said angular velocity input between said pair of thermosensitive elements, and said angular velocity being allowed to be detected by the measurement of said temperature difference, the improvement wherein: said hollow cylindrical space of said hollow cylindrical casing being provided with a heater plate therein to directly heat said gas sealed within said casing so that said thermosensitive elements can be heated to a predetermined temperature by said heated sealed gas within a short time.
Claim 3
Dependent Claim
35 words
A gas-rate sensor as claimed in claim 1, wherein said heater plate is mounted to the inner surface of a dust plate arranged within said hollow cylindrical space so as to confront said nozzle means.
Claim 4
Dependent Claim
24 words
A gas-rate sensor as claimed in claim 1, wherein the outer peripheral surface of said cylindrical casing is additionally wound by electric heating wires.
Claim 5
Dependent Claim
38 words
A gas-rate sensor as claimed in claim 3, wherein the heating outputs of said heater plate and said heating wires are so selected that the heated temperature of the former is somewhat higher than that of the latter.