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693 results about "Altimeter" patented technology

An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level. The measurement of altitude is called altimetry, which is related to the term bathymetry, the measurement of depth under water.

Method and apparatus including altimeter and accelerometers for determining work performed by an individual

Method and calculations determine an individual's, or several individuals' simultaneous rates of oxygen consumption, maximum rates of oxygen consumption, heart rates, calorie expenditures, and METS (multiples of metabolic resting rate) in order to determine the amounts of work that is performed by the individual's body. A heart monitor measures the heart rate, and an accelerometer measures the acceleration of the body along one or more axes. An altimeter measures change in altitude, a glucose monitor measures glucose in tissue and blood, and thermometers, thermistors, or thermocouples measure body temperature. Data including body fat and blood pressure measurements are stored locally and transferred to a processor for calculation of the rate of physiological energy expenditure. Certain cardiovascular parameters are mathematically determined. Comparison of each axis response to the individual's moment can be used to identify the type of activity performed and the information may be used to accurately calculate total energy expenditure for each physical activity. Energy expenditure may be calculated by assigning a separate proportionality coefficient to each axis and tabulating the resulting filtered dynamic acceleration over time, or by comparison with previously predetermined expenditures for each activity type. A comparison of total energy expenditure from the current activity is compared with expenditure from a previous activity, or with a baseline expenditure rate to assess the level of current expenditure. A measure of the individual's cardio-vascular health may be obtained by monitoring the heart's responses to various types of activity and to total energy expended.
Owner:TELECOM MEDICAL

Airborne inventory and inspection system and apparatus

A system and apparatus for acquiring images of electric transmission line tower structures, equipment attached to said tower structures, and transmission lines suspended from said towers. The system uses a fixed wing aircraft and an arrangement of at least one still camera, means for detecting a tower structure, a data storage unit, and a central processing unit containing operational software. The central processing unit is connected to the camera, the means for detecting a tower structure, and the storage unit. The detection means is a laser altimeter or a combination of preset longitude / latitude coordinates for tower locations and a GPS unit which supplies continuous longitude / latitude coordinates for the aircraft location for comparison to those preset coordinates. The aircraft is flown along the transmission line at a predetermined altitude above the tops of said towers (60–100 feet). The still camera points rearwardly relative to the line of flight of the aircraft and take a picture from between two adjacent towers and along an exposure line directed downwardly at an angle to the line of flight, 30–60 degrees and preferably 45 degrees. The detecting means transmits a signal to the central processing indicative of the presence of a tower to be photographed. The central processing unit calculates the time delay necessary for said aircraft to fly past the tower to a predetermined exposure point located between the tower to be photographed and the next tower in said transmission line after the tower to be photographed. The still camera is activated at the exposure point to acquire an image of the tower structure. The data corresponding to the acquired image is transmitted to a data storage unit for later retrieval and examination to identify defects in the tower or the equipment or transmission lines suspended form the tower. The system is reset to continue acquiring images along the transmission lines. The system is also provided with a video capability to film the towers and transmission lines and the line right-of-way.
Owner:POWER VIEW COMPANY L L C

Microminiature personal combined navigation system as well as navigating and positioning method thereof

InactiveCN102445200AReduce electromagnetic interferenceSuitable for personal portabilityNavigation instrumentsAccelerometerGyroscope
The invention discloses a microminiature personal combined navigation system as well as a navigating and positioning method thereof. The system is composed of a subsystem installed on the foot part of a human body and a subsystem installed on the trunk position, wherein the subsystem installed on the foot part comprises an MEMS IMU (Micro-electromechanical Systems Inertial Measurement Unit), a magnetometer and a communication module; and the subsystem installed on the trunk position comprises a satellite navigation receiver, a Doppler velometer, an atmospheric pressure altimeter, a communication module and a microminiature navigation computer. The positioning method comprises the following steps of: collecting the MEMS IMU signal; modeling and correcting the random error of a gyroscope and an accelerometer; initially aligning an MEMS inertial navigation system; resolving strapdown inertial navigation, and correcting zero speed; carrying out combined navigation of the MEMS inertial navigation system/ satellite navigation receiver/ the Doppler velometer/ the magnetometer/ and the atmospheric pressure altimeter; and displaying the navigation result in real time. The microminiature individual combined navigation system is convenient to individually carry, individual real-time gesture fixing, velocity measurement and positioning can be realized, and whole and precise real-time navigation positioning information can be provided for pedestrians, operating personnel, soldiers, rescue workers and the like in the complex electromagnetic environment.
Owner:NANJING UNIV OF SCI & TECH

Method and system for monitoring power transmission line of power grid

ActiveUS20140123750A1Reliable online monitoringPreventing and reducing accidents of the power transmission lineRainfall/precipitation gaugesWeather/light/corrosion resistanceElectric power transmissionCurrent sensor
A system for monitoring a power transmission line of a power grid, including a first comprehensive sensor (402, 502) disposed at the intermediate position of a power transmission line between two towers including an altimeter, a first acceleration sensor, a temperature and humidity sensor and a rainfall sensor; a second comprehensive sensor (404, 504) disposed at the cable connector of the power transmission line including a leakage current sensor, a tension sensor and a wind speed and direction sensor; and a second acceleration sensor (406, 506) disposed at the intermediate position of the power transmission line between the cable connector of the power transmission line and the first comprehensive sensor (402, 502). A method for monitoring a power transmission line of a power grid, including a step of monitoring the sag condition, wind yaw angle, motion and position tracking, flutter conditions, breeze vibration level, fatigue life and icing situation of a power transmission line. The method and system for monitoring a power transmission line of a power grid effectively prevent and reduce incidents of the power transmission line of the power grid based on sensor multi-dimensional sensing technology combined with the advantages of wireless sensor network technology.
Owner:STATE GRID INFORMATION & TELECOMM BRANCH

ARM (advanced RISC (reduced instruction set computer) machines) and FPGA (field-programmable gate array) based navigation and flight control system for unmanned helicopter

The invention discloses an ARM (advanced RISC (reduced instruction set computer) machines) and FPGA (field-programmable gate array) based navigation and autonomous flight control system for an unmanned helicopter. The system comprises a PC (personal computer), an integrated navigation subsystem, a power supply module and controllers, wherein the integrated navigation subsystem comprises a sensor group; the sensor group comprises a GPS (global positioning system), a gyroscope, an accelerometer, a magnetoresistive sensor, a barometric altimeter and a sonar altimeter; the controllers include a main controller and a steering engine controller; the main controller adopts an ARM microprocessor to operate the integrated navigation algorithm and flight control PID (proportion integration differentiation) algorithm and simultaneously completes data acquisition of the GPS, the barometric altimeter and the sonar altimeter; and the steering engine controller adopts an FPGA to realize data acquisition of the gyroscope, the accelerometer and the magnetoresistive sensor and transfers the data to the main controller via a concurrent bus to carry out attitude calculation and control operation on the unmanned helicopter. With the unmanned helicopter as a carrier, the hardware environment of a whole set of flight control system integrating study of the aircraft navigation and control theory problem, data acquisition, information transfer and embedded control is set up.
Owner:TIANJIN UNIV

Low-cost combination type positioning and orienting device and combined positioning method

InactiveCN101319902AMeet the requirements of medium precision positioning and orientationReduce volumeNavigation by speed/acceleration measurementsGyroscopeAccelerometer
The invention provides a combined locating and orienting device with lower cost and a combined locating and orienting method thereof. The device mainly includes an MEMS INS consisting of an MEMS IMU and a navigation computer, a GPS receiver, a 3D digital electric compass, an altometer, an aerodromometer, a power module, a box body, a socket connector, etc; wherein, the MEMS INS includes 9 MEMS gyroscopes and 6 double-axis MEMS accelerometers which respectively measure the palstance and the acceleration of a moving carrier; then the palstance and the acceleration are inputted into a navigation calculating program to calculate the information like the pose, the position and the speed of an obtained carrier. Simultaneously, the navigation computer regularly collects the information of the navigation sub-units like the GPS receiver, the 3D digital electric compass, the aerodromometer and the altometer by a 232 series port and obtains the best navigation information like the position, the pose, the speed and the height of the carrier by information fusion processing; the precision of the invention is better than a single sub-system in the device. The combined locating and orienting device with lower cost has the advantages of small size, low power consumption, low cost, complete functions and abundant interfaces, thus being capable of completely meeting the locating and orienting requirements with middle precision for carrying the carrier on the ground or in the air.
Owner:HARBIN ENG UNIV

General aviation flight monitoring airborne system based on ADS-B (Automatic Dependent Surveillance-Broadcast)

The invention provides a general aviation flight monitoring airborne system based on an ADS-B (Automatic Dependent Surveillance-Broadcast). The system comprises an airborne ADS-B transceiver based on UAT (Ultra Aperture Terminal)\1090ES (Echo Sounding), a message processor based on the ADS-B and an airborne CDTI (Cockpit Display of Traffic Information) based on the ADS-B. The system provided by the invention has an ADS-B OUT/IN function and can be used for coding information input by an airborne FMS (flight management system), a GNSS (Global Navigation Satellite System), a barometric altimeter and a pilot, generating a message and broadcasting the message; and the system can receive flight status ADS-B messages of other airplanes and ground monitoring messages and separate UAT signals from 1090ES signals by virtue of a UAT data chain and a 1090ES data chain. The system provided by the invention can be used for respectively verifying, storing and parsing the flight status of the other airplanes\ground monitoring messages, messages of a local airplane, heartbeat messages of a host, graphical display navigation information, traffic information of the local airplane and traffic information of the other airplanes within a certain range of the local airplane.
Owner:北京民航天宇科技发展股份有限公司

Integrated navigation method and equipment based on multisource information fusion

The invention provides an integrated navigation method and equipment based on multisource information fusion. The method comprises the following steps: obtaining multisource navigation information, namely obtaining navigation related information from one or more of a global satellite navigation system GNSS, an inertial navigation system INS, a multimode region difference augmentation system MLDAS, a pressure altimeter and timekeeping equipment, which are arranged on an aircraft; performing fusion treatment on multisource information by using a federal wave filter, wherein the federal wave filter comprises a main wave filter and a plurality of local wave filters connected with the main wave filter, and each kind of the multisource navigation information and a reference signal are jointly input to one local wave filter; triggering the local wave filters to respectively calculate local estimation values and error covariance matrixes; triggering the main wave filter to perform wave filtering on the reference signal, and performing optimal infusion on the wave filtering results of the reference signal according to output results of the local wave filters and the local wave filters, so as to obtain a global optimum estimation value. Therefore, the availability and the integrity of on-board navigation equipment are improved.
Owner:ZHONGWEI IOT CHENGDU TECH CO LTD

System for profiling objects on terrain forward and below an aircraft utilizing a cross-track laser altimeter

A forward looking cross-track laser altimeter comprises: a first configuration of optical elements for guiding pulsed laser beams along a first optical path; a mirror element coupled to a scanner and disposed in the first optical path, the scanner operative to oscillate the mirror element to sweep the reflected laser beams back and forth across a line at a predetermined frequency; the scanner and mirror element configurable to reflect the pulsed laser beams along paths forward and downward at a predetermined angle to the flight path of the aircraft, wherein the pulsed laser beam paths are caused to be line swept across a ground track forward the aircraft; the mirror element for receiving returns of the pulsed laser beams from the terrain and objects on the terrain forward the aircraft and reflecting the returns along a second optical path to a light detector which produces a return signal in response thereto; a first circuit governed by the return signals for measuring times-of-flight of the returns and generating time-of-flight signals corresponding thereto; the scanner for generating a line sweep position signal; and a second circuit for generating for each return a data profile comprising range and line sweep position thereof based on the corresponding time-of-flight and position signals.
Owner:ROSEMOUNT AEROSPACE
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