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333results about How to "Short response time" patented technology

Deep sea ballast releasing device

The invention provides a deep sea ballast releasing device. The device comprises a bracket, wherein the bracket is provided with an electric solenoid component and a two-stage lever releasing component; the electric solenoid component consists of a deep sea electric solenoid and an electric solenoid plunger; the two-stage lever releasing component consists of a first-stage lever and a second-stage lever; the first-stage lever and the second-stage lever can rotate on a vertical plane around a supporting point on respective bracket; the position of the gravity point of the first-stage lever is restrained by one end of the electric solenoid plunger; the force point of the first-stage lever is the gravity point of the second-stage lever; and the force point of the second-stage lever is a ballast suspension point. The first-stage lever is matched with the second-stage lever to obtain a relatively long resistance arm with a relatively small space, and the release of the ballast is controlled by a small power produced after the electric solenoid is electrified, so that the safety and the reliability are achieved. The device has a simple and compact structure, can be used repeatedly and used in full sea depth, has pressure resistance and corrosion resistance, can be reliably carried and release ballast of 100 kilograms, has short response time and is particularly suitable for releasing the ballasts of underwater robots and deep sea engineering machinery.
Owner:HUAZHONG UNIV OF SCI & TECH

Electronic-control high-efficiency holographic grating made of polymer dispersed liquid crystal materials doped with nano metal and preparation method thereof

The invention discloses an electronic-control high-efficiency holographic grating made of polymer dispersed liquid crystal materials doped with nano metal and a preparation method of the holographic grating. The preparation method comprises the following steps, uniformly mixing and heating polymer dispersed liquid crystal materials containing nano metal particle materials by an ultrasonic emulsification instrument under the light shading condition, standing for 24-48h in a dark room, then injecting the polymer dispersed liquid crystal materials into a liquid crystal box, and then arranging the packaged liquid crystal box at a holographic light field of a helium-cadmium laser for exposure to finally obtain the electronically-controlled high-efficiency holographic grating made of polymer dispersed liquid crystal materials doped with nano metal. In the steps, the polymer dispersed liquid crystal materials comprise the following components by weight: 0.1-0.2% of photoinitiator, 0.3-0.5% of coordinated initiator, 9-11% of cross linking agent, 9-10% of surface active agent, 0.1-0.2% of nano metal particles, 40-50% of polymers and 30-40% of nematic liquid crystal. According to the electronic-control high-efficiency holographic grating made of polymer dispersed liquid crystal materials doped with nano metal, the diffraction efficiency reaches up to 85%-95%, the response speed is less than 1ms, and the electro-optic properties are improved remarkably.
Owner:UNIV OF SHANGHAI FOR SCI & TECH

Non-contact infrared thermometer

ActiveCN104287697AShort response timeImprove measurement precision and accuracyDiagnostics using lightSensorsOlder peopleEngineering
The invention discloses a non-contact infrared thermometer. The non-contact infrared thermometer comprises a non-contact infrared temperature sensor, a temperature difference thermopile amplifying circuit, a temperature compensating and amplifying circuit, an A/D (analog/digital) conversion circuit, a master control circuit, a display circuit and an alarming circuit. The non-contact infrared temperature sensor is connected with the temperature difference thermopile amplifying circuit and the temperature compensating and amplifying circuit; the temperature difference thermopile amplifying circuit and the temperature compensating and amplifying circuit are connected with each other and connected to the A/D conversion circuit respectively; the A/D conversion circuit is connected with the master control circuit; the master control circuit is connected with the display circuit and the alarming circuit. The non-contact infrared thermometer solves the problem that traditional thermometers require contact measurement and meets the requirements of people on novel temperature taking modes through relatively short response time and high measuring precision and accuracy. Meanwhile, the non-contact infrared thermometer is free from interference of environmental factors and the like, stable in performance, convenient to read, capable of achieving the aim of real-time monitoring and applicable to care for old people, children and patients.
Owner:广州市得仕医用科技有限公司
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