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5 results about "Chip-scale atomic clock" patented technology
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A chip scale atomic clock (CSAC) is a compact, low-power atomic clock fabricated using techniques of microelectromechanical systems (MEMS) and incorporating a low-power semiconductor laser as the light source. The first CSAC physics package was demonstrated at NIST in 2003 , based on an invention made in 2001 . The work was funded by the US Department of Defense's Defense Advanced Research Projects Agency (DARPA) with the goal of developing a microchip-sized atomic clock for use in portable equipment. In military equipment it is expected to provide improved location and battlespace situational awareness for dismounted soldiers when the global positioning system is not available, but many civilian applications are also envisioned. Commercial manufacturing of these atomic clocks began in 2011. The CSAC, the world's smallest atomic clock, is 4 x 3.5 x 1 cm (1.5 x 1.4 x 0.4 inches) in size, weighs 35 grams, consumes only 115 mW of power, and can keep time to within 100 microseconds per day after several years of operation.
A high-precision beidou time service master clock device based on double-chip atomic clock fusion
PendingCN122110653AApparatus using atomic clocksRadio-controlled time-piecesComputer hardwareAlgorithms performance
The application discloses a kind of high-precision Beidou time service master clock devices based on double-chip atomic clock fusion, it relates to timing synchronization technical field, the device includes satellite receiving module, master control processing module, double-chip atomic clock module, clock taming module, time-frequency output module, display control module and power module;Each module is cooperated by work mode automatic switching mechanism Work;Double-chip atomic clock module adopts two pieces chip level atomic clock and constitutes master-slave redundant architecture, and the phase and frequency deviation information of main atomic clock and slave atomic clock are fused and mutually checked by extended Kalman filtering;The taming algorithm in clock taming module is formed by extended Kalman filtering link, PID controller link, digital phase-locked loop link cascade;Work mode automatic switching mechanism is according to the automatic switching of work mode according to the operating state of the device;Overcome the insufficient of time service precision, low reliability, taming algorithm performance is limited and so on in prior art.
Owner:SOUTHWESTERN INST OF PHYSICS
Underground time synchronization system for coal mine
The invention relates to an underground time synchronization system for a coal mine. The underground time synchronization system comprises a master clock, the master clock receives satellite time service calibration and is used for providing an underground clock reference source, the master clock is a chip-level atomic clock, and the master clock is switched to a local time keeping mode under the abnormal condition of satellite time service; the slave clock is arranged at a time client of the underground terminal equipment of the coal mine, and the master clock continuously gives time to the slave clock through the underground industrial Ethernet by adopting IEEE 802.1 AS protocol communication of the TSN, and the slave clock is arranged at a time client of the underground terminal equipment of the coal mine. The master clock is connected to a TSN switch in the industrial Ethernet and broadcasts time information to the slave clock in a gPTP message form. According to the underground time synchronization system, satellite time service calibration and a chip-level atomic clock are adopted, and the system is switched to a local time keeping mode when satellite time service is abnormal, so that high-precision time synchronization between equipment is still kept under the extreme conditions of underground power failure and the like.
Owner:SHANDONG ENERGY GRP CO LTD +1
Multi-purpose application chassis and method
PendingUS20260122815A1Internal/peripheral component protectionDigital data authenticationNetwork-attached storageNetwork processing
A multi-purpose application chassis may provide multiple mission services and includes a chassis housing having a front-mounted display interface, one or more rear-mounted input / output (I / O) connectors, a first front-mounted slot configured for a removable encryptor module, and a second front-mounted slot configured for a removable baseboard module. The removable baseboard module includes a first programmable logic to provide zero root of trust, second programmable logic for I / O and network processing, a chip scale atomic clock (CSAC) configured as a master time source, a plurality of storage drives for network attached storage (NAS), and a plurality of transceivers to provide I / O between the I / O connectors and the first and second programmable logic. The first slot and storage drives are configured to handle COTS SATA encryption modules as well as PCIe encryption modules, and when installed can provide Data-at Rest (DAR) NAS.
Owner:ROCKWELL COLLINS INC
Miniaturized atomic beam clock physics system and clock generation method
The present invention relates to the technical field of atomic frequency standards, and in particular to a miniaturized atomic beam clock physics system and a clock generation method. The atomic beam clock physics system comprises: an alkali metal atom emission cavity, an alkali metal raw material block, a microcapillary array, a drift cavity, a multilayer silicon substrate, a laser, a fiber-optic phase modulator, a beam splitter prism, a plurality of reflecting mirrors, and a signal detector. Compared with a conventional coherent population trapping detection method based on a vapor cell, the present invention achieves a narrower fluorescence spectrum width and higher long-term frequency stability, also has a chip‑level integration capability, and has higher competitiveness compared with existing chip-scale atomic clocks based on a vapor cell structure.
Owner:HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
High-sealing miniature atomic gas chamber for quantum sensing and manufacturing method of high-sealing miniature atomic gas chamber
PendingCN121269611ADetection of fluid at leakage pointTelevision system detailsGyroscopeFemto second laser
The invention discloses a high-sealing miniature atomic gas chamber for quantum sensing, which sequentially comprises a first glass substrate, a second glass substrate and a third glass substrate from top to bottom, the second glass substrate is internally provided with an atmosphere chamber cavity for accommodating buffer gas and atom steam, a small rubidium source cavity for placing a solid rubidium source and a micro-pore channel for connecting the large cavity and the small cavity to release rubidium atoms; the light-passing windows of the first glass substrate and the third glass substrate are respectively aligned with the atmosphere chamber cavity to form a double-end optical path; the invention further discloses a manufacturing method. According to the invention, a three-layer glass structure is adopted, femtosecond laser cutting and welding are carried out, local gold plating is carried out to enhance absorption, and the high-sealing micro atomic gas chamber is suitable for high-precision quantum sensing equipment such as chip-level atomic clocks, atomic magnetometers and quantum gyroscopes.
Owner:WUHAN HUAZHONG TIANWEI MEASUREMENT & CONTROL CO LTD