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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 4. Отображено 4.
01-06-2011 дата публикации

Temperature reentrant current limiting apparatus

Номер: CN0102081423A
Автор: WEIXUE YU, HUI YIN, YAJUN SHI, PEIXIAN CAI, YU WEIXUE, YIN HUI, SHI YAJUN, CAI PEIXIAN
Принадлежит:

The invention discloses a temperature reentrant current limiting apparatus comprising a PTAT current generating circuit to generate PTAT (Proportional to Absolute Temperature) current, a PTAT current mirror circuit to mirror the PTAT current so as to generate mirror current, a reference voltage generating circuit to generate reference voltage and a reference voltage shunting and limiting circuit to obtain the reference voltage and mirror current, the reference voltage shunting and limiting circuit is controlled by the reference voltage to generate shunt current with positive temperature coefficient so as to shunt the mirror current and output shunted residual current whose value is the difference between the mirror current and the shunt current, while the residual current is accepted and mirrored by an output current mirror circuit to generate output current. In such way, reentrant current limiting is realized without simultaneously inspecting temperature of chips and output voltage value ...

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Номер записи: 1
07-04-2023 дата публикации

Concrete structure detection method

Номер: CN115931612A
Автор: FU GUANYU, FU SANXING, LUO SHAOHUI, LI CHUNBO, LI SHUTING, DONG XINGKAI, LIN YANXIANG, CAI PEIXIAN, YAO BAIYE, TAN ZENGWU, CHEN RONGHUA, CHEN JIALUAN, LUO LIANG, LI QI, HONG MEIYING, HU JUNBIAO
Принадлежит:

The invention discloses a concrete structure detection method which comprises the following steps: a rebound method is a method for presuming the concrete strength by utilizing the correlation between the concrete surface hardness and strength; the concrete strength is detected through a rebound method, the concrete protection layer steel bar distribution distance and the protection layer thickness are detected through an electromagnetic method, the concrete floor thickness is detected through the electromagnetic method, the mortar strength is detected through a penetration method, and the masonry compressive strength is detected through an in-situ axial compression method. The invention discloses a method flow for detecting corrosion of reinforcing steel bars in concrete by a half-cell potentiometry and detecting the bearing capacity, deflection and crack width of a prestressed concrete member by a load test method, and solves the problem that the existing concrete structure detection ...

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Номер записи: 2
14-07-2023 дата публикации

Scaffold facilitating material loading and unloading for building construction

Номер: CN116427673A
Автор: CAI PEIXIAN
Принадлежит:

The scaffold facilitating material loading and unloading for building construction comprises a scaffold body, the top of the scaffold body is connected with a top plate, a hollow frame body is connected between one side of the top plate and one side of the scaffold body, and a conveying mechanism is arranged between the two sides of the inner wall of the hollow frame body; a plurality of material containing mechanisms are arranged on the conveying mechanism, the conveying mechanism is used for driving the plurality of material containing mechanisms to roll, a material containing barrel is hung on two hanging rings through two hooks, a motor is started to drive one rotating rod to rotate, so that four chain wheels drive two chains to roll, and the material containing barrel is driven to move; and when the material containing barrels are conveyed to the top of the top plate, the two hooks can be taken down from the interiors of the two hanging rings, so that materials in the material containing ...

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Номер записи: 3
27-06-2012 дата публикации

Temperature reentrant current limiting apparatus

Номер: CN0102081423B
Автор: YU WEIXUE, YIN HUI, SHI YAJUN, CAI PEIXIAN, WEIXUE YU, HUI YIN, YAJUN SHI, PEIXIAN CAI
Принадлежит:

The invention discloses a temperature reentrant current limiting apparatus comprising a PTAT current generating circuit to generate PTAT (Proportional to Absolute Temperature) current, a PTAT current mirror circuit to mirror the PTAT current so as to generate mirror current, a reference voltage generating circuit to generate reference voltage and a reference voltage shunting and limiting circuit to obtain the reference voltage and mirror current, the reference voltage shunting and limiting circuit is controlled by the reference voltage to generate shunt current with positive temperature coefficient so as to shunt the mirror current and output shunted residual current whose value is the difference between the mirror current and the shunt current, while the residual current is accepted and mirrored by an output current mirror circuit to generate output current. In such way, reentrant current limiting is realized without simultaneously inspecting temperature of chips and output voltage value ...

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Номер записи: 4