摘要:
To provide a heat detector in which thermal responsiveness of a heat detecting unit such as a ceramic element is improved.A heat detector 1 includes a ceramic element 10 accommodated in a sensing-device main body, and measures a temperature in a monitoring area based on a dielectric constant of the ceramic element 10. The Curie point temperature of the ceramic element 10 is set in a predetermined sensitive temperature range.
摘要:
An object is to build a protective structure which can protect a ferroelectric material from a surrounding environment when the ferroelectric material is used as a heat detecting element of a heat detector, thereby enhancing the reliability of the heat detector.A heat detector includes a heat detecting unit 11 that senses heat in a monitoring area, and a casing 81 that holds the heat detecting unit 11, and the heat detecting unit is held by the casing 11 via a laminating portion 60 which serves to protect the heat detecting unit 11.
摘要:
[Object] To provide a heat detector in which thermal responsiveness of a heat detecting unit such as a ceramic element is improved.[Means] A heat detector 1 includes a ceramic element 10 accommodated in a sensing-device main body, and measures a temperature in a monitoring area based on a dielectric constant of the ceramic element 10. The Curie point temperature of the ceramic element 10 is set in a predetermined sensitive temperature range.
摘要:
An object is to build a protective structure which can protect a ferroelectric material from a surrounding environment when the ferroelectric material is used as a heat detecting element of a heat detector, thereby enhancing the reliability of the heat detector.A heat detector includes a heat detecting unit 11 that senses heat in a monitoring area, and a casing 81 that holds the heat detecting unit 11, and the heat detecting unit is held by the casing 11 via a laminating portion 60 which serves to protect the heat detecting unit 11.
摘要:
This smoke detector is provided with: a plurality of light emitting devices which emit light beams of mutually different wavelengths; and a plurality of scattered light receiving sections which receive, at a different scattering angle for each light beam of the respective wavelengths, scattered light generated due to the plurality of light beams emitted simultaneously from these light emitting devices impinging on smoke.
摘要:
Disclosed is a wound iron core (3) for a static apparatus in which magnetic paths in the inside of the wound iron core are subdivided to improve iron core characteristics. The iron core (3) is configured by using two or more kinds of magnetic materials (11 to 14) with different magnetic permeabilities to form laminated blocks with single plates or a plurality of laminated plates and by alternately arranging the laminated blocks with different magnetic permeabilities from the inner circumference. An iron core material (14) with large magnetic permeability out of iron core materials with different magnetic permeabilities is arranged on the inner circumference side. Further, when the iron core materials with different magnetic permeabilities are alternately arranged, the iron core materials (11) with the same magnetic permeability are configured to gradually change in thickness to ease an excessive magnetic flux density distribution in the iron core. A ring-shaped iron core is configured such that a plurality of block-like laminated members, which are each formed by laminating a plurality of strip-like amorphous material thin plates, are laminated and formed into a ring shape and a sheet-like non-magnetic insulation material is arranged between the n-th (n: an integer of two or more) layer of the ring-shaped block-like laminated members from the most inner circumference side and the (n+1)-th layer of the ring-shaped block-like laminated members from the most inner circumference side.
摘要:
An oil-filled transformer monitoring system is provided which calculates an oil temperature of an oil-filled transformer with high precision from a current of the transformer and an ambient temperature. The oil-filled transformer monitoring system of this invention has an oil temperature calculation device to calculate a transformer oil temperature using measurements from a transformer current measuring device and an ambient temperature measuring device. The transformer monitoring system also has an oil temperature measuring device and compares an output value from the oil temperature calculation device with an output value from the oil temperature measuring device to detect any anomaly.
摘要:
[Problem to be Solved]To provide a smoke sensing system, a smoke sensor and a receiver that can accurately determine the type of smoke.[Solution]The smoke sensor includes: a light-projecting unit 13 for projecting detection light toward a monitored area; a first light-receiving unit 14a, a second light-receiving unit 14b and a third light-receiving unit 14c for receiving the detection light scattered by particles existing in the monitored area, the first light-receiving unit 14a, the second light-receiving unit 14b and the third light-receiving unit 14c being arranged such that the angle between the light-receiving axis of the first light-receiving unit 14a and the light-projecting axis of the light-projecting unit 13, the angle between the light-receiving axis of the second light-receiving unit 14b and the light-projecting axis of the light-projecting unit 13 and the angle between the light-receiving axis of the third light-receiving unit 14c and the light-projecting axis of the light-projecting unit 13 are different from one another; a smoke type determination unit 47 for determining the type of smoke generated in the monitored area based on the output values output from the first light-receiving unit 14a, the second light-receiving unit 14b and the third light-receiving unit 14c; and a fire determination unit 48 for determining whether or not a fire has occurred in the monitored area based on the output values output from the first light-receiving unit 14a, the second light-receiving unit 14b and the third light-receiving unit 14c.
摘要:
[Problem to be Solved]To provide a smoke sensing system, a smoke sensor and a receiver that can accurately determine the type of smoke.[Solution]The smoke sensor includes: a light-projecting unit 13 for projecting detection light toward a monitored area; a first light-receiving unit 14a, a second light-receiving unit 14b and a third light-receiving unit 14c for receiving the detection light scattered by particles existing in the monitored area, the first light-receiving unit 14a, the second light-receiving unit 14b and the third light-receiving unit 14c being arranged such that the angle between the light-receiving axis of the first light-receiving unit 14a and the light-projecting axis of the light-projecting unit 13, the angle between the light-receiving axis of the second light-receiving unit 14b and the light-projecting axis of the light-projecting unit 13 and the angle between the light-receiving axis of the third light-receiving unit 14c and the light-projecting axis of the light-projecting unit 13 are different from one another; a smoke type determination unit 47 for determining the type of smoke generated in the monitored area based on the output values output from the first light-receiving unit 14a, the second light-receiving unit 14b and the third light-receiving unit 14c; and a fire determination unit 48 for determining whether or not a fire has occurred in the monitored area based on the output values output from the first light-receiving unit 14a, the second light-receiving unit 14b and the third light-receiving unit 14c.