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7748 results about "Digital conversion" patented technology

Safety monitoring early warning and safety management system and method for oil gas extracting, gathering and transporting operation

The invention relates to a safety monitoring early warning and safety management system of oil and gas extraction and gathering operations as well as a method thereof, belonging to the technique field of safety production monitoring and supervision, and the system is composed of a monitoring center arranged at an oil and gas extraction safety monitoring and management department and a plurality of on-site monitoring terminals disposed at all oil and gas extraction operation areas. The method comprises: collecting and transmitting safety-related parameter signals, video signals and audio signals in real time; implementing the analog-digital conversion or signal conversion and compression coding to the signals; then transmitting the signals to all hosts of the monitoring center; processing and analyzing the received three types of signal information by all the hosts and then carrying out the parameter monitoring, video monitoring and audio communication respectively; and outputting the processed three types of information to the spot for being controlled correspondingly. The invention can realize the risk assessment, dynamic intelligent monitoring, safety state analysis, accident early warning and alarming, safety guarantee control and safety management of the whole process of operations ranging from oil and gas extraction, heating, separation processing, storage to transportation for oil and gas production enterprises.
Owner:CHINA ACAD OF SAFETY SCI & TECH

Respiratory gas consumption monitoring device and monitoring method

The present invention relates to a respiratory gas consumption monitoring method and monitoring device that is portable and has high measurement accuracy, for enabling the analysis and prediction of the respiratory behavior of subjects employing a variety of different types of breathing apparatuses in water, etc. Respiratory gas consumption monitoring device (20), for monitoring the respiratory gas consumption of the user of a breathing apparatus (1) in which a respiratory gas (G) inside a high pressure gas container (2) is reduced in pressure at pressure regulator (4) and supplied to a breathing mask (10), is provided with:a primary pressure sensor (21) for detecting the pressure prior to pressure reduction at pressure regulator (4);a temperature sensor (22) for correction;an environmental pressure sensor (23) for detecting the environmental pressure;an amplifier (24) for amplifying the signals from the aforementioned sensors;an A / D converter (25) for performing analog / digital conversion of the amplified signal;a data logger (26) for recording and storing the analog / digital converted signals; anda display (27) for display.In addition, as needed, a computer (X) for calculating, analyzing, and predicting data may be housed in housing (28), and connected to breathing apparatus (1) by connecting primary pressure sensor (21) to a high pressure opening (8) of pressure regulator (4) using a high pressure hose (29).
Owner:NIPPON SANSO CORP +1

Pipeline leakage checking system

The invention discloses a pipe leakage detecting system, comprising a controller and a pipe leak detector, wherein, the controller processes and store data in the pipe leak detector through a wireless technology; the pipe leak detector also comprises a sensor, an amplifier, an analog-digital conversion module, a main processor, a GPS clock synchronization control module, a wireless communication module and a power supply module, wherein, the sensor is arranged on a pipe to be detected; the amplifier is connected with the sensor; the analog-digital conversion module is connected with the amplifier; the main processor is connected with the analog-digital conversion module; the GPS clock synchronization control module is connected with the main processor; the wireless communication module is connected with the main processor; and the power supply module is connected with the main processor. In the invention, sensors are arranged on the outer wall of the pipe at intervals and receive sound waves produced by leakage points on the pipe under the condition that GPS time service error is less than 200nS, thereby realizing high sensitive detection of the pipe leakage and high precise positioning of leakage sources. In addition, the pipe leakage detecting system is characterized by low cost, small volume, light weight, being portable and convenient operation.
Owner:CHINA SPECIAL EQUIP INSPECTION & RES INST +1

Method and systems for accessing information on a network using message aliasing functions having shadow callback functions

The present invention provides methods and systems for accessing a network URL through a pre-assigned simplified network address, correlating to the URL, and for displaying the home page having the URL as its address. These methods and systems provide easier URL and home page access because persons wanting to access the home page need only input the simplified network address, thereby avoiding the need to know and input the URL character string. The simplified network addresses of the present invention include numbers. Methods are provided for selecting numbers for assignment to URLs. The URL and home page access and display methods of the present invention include: assigning a simplified network address such as a number to a URL, storing the URL and number conversion in a network accessible storage system, inputting the assigned number in a network accessible computer, communicating the inputted number to the storage system, converting the number to the URL, retrieving the home page corresponding to the URL and displaying the home page on the computer. Additionally, the invention provides methods for use in message passing operating systems wherein system level messages to specific objects are intercepted, creating an alias message. The invention further defines networked systems and methods for operating the networked systems that rely on the interception and rule-based modification of messages passing between system applications.
Owner:INTERNET NUMBER

Microwave three-dimensional imaging method based on rotary antenna array

The invention discloses a microwave three-dimensional imaging method based on a rotary antenna array, and relates to a microwave imaging technology. The method comprises the following steps of: generating an electromagnetic signal by a signal transmitting module; driving an antenna array module which is distributed in a straight line form or a curved line form to rate by a mechanical scanning module, meanwhile, controlling the antenna array module by a switch array module to transmit an electromagnetic signal at the same time, and receiving a signal which is reflected back from an observation target by a back wave receiving module; converting a reflecting signal into a digital signal by an analogue-digital conversion module; and using the digital signal as back wave data acquired by an array element position of the corresponding antenna array; imaging the back wave data by a data processing module to acquire a three-dimensional complex image of the observation target; and displaying the three-dimensional complex image of the observation target by a display module. The imaging method disclosed by the invention is used for application fields of human body surface microwave image acquisition and safe detection, three-dimensional data acquisition of a human body and action based on actual circumstances, nondestructive testing, radar target imaging diagnosis and the like.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI

Sleep period separating method and system

The invention discloses a sleep period separating method and system. The method is applied to a sleep period separating system. The system comprises a first measuring electrode, a second measuring electrode, a first reference electrode, a second reference electrode, an amplification collector and a period separating device. The first measuring electrode is used for being placed on the left side of the forehead or the temporal hair-free region on the left side of a testee, the second measuring electrode is used for being placed on the right side of the forehead or the temporal hair-free region on the right side of the testee, the first reference electrode is used for being placed on the periphery of the left ear of the testee, and the second reference electrode is used for being placed on the periphery of the right ear of the testee. The method comprises the steps that the first measuring electrode and the second measuring electrode are utilized for collecting electroencephalogram signals and electro-oculogram signals of the testee, the signal amplification collector is used for amplifying the electroencephalogram signals and the electro-oculogram signals and carrying out analog-digital conversion on the amplified signals. The period separating device determines the separated sleep periods according to the analog-digital converted electroencephalogram signals and electro-oculogram signals.
Owner:河北宁博科技有限公司 +1

BOTDR (Brillouin Optical Time Domain Reflectometer) for calibrating optical power of reference light and calibrating method thereof

The invention relates to a BOTDR (Brillouin Optical Time Domain Reflectometer) for calibrating optical power of reference light and a calibrating method thereof. The calibrating method comprises the following steps of: acquiring an electric signal of local reference light from a heterodyne photoreceiver on a basis of a traditional BOTDR for heterodyne coherent detection; transmitting the electric signal subjected to analog-to-digital conversion in a computer to be used as the optical power calibrating feedback quantity of the reference light; sending out an instruction by the computer to adjust the output power of a microwave source and change the optical power of the local reference light so that the difference between the optical power of the local reference light and the preset reference light power is smaller than a set value; calibrating the power; and detecting a BOTD signal. In the invention, the BOTDR in a working process can not be influenced by the working environment temperature, a microwave transmission line connecting the microwave source with an electro-optic modulator and different power responses of the electro-optic modulator on microwave signals of different frequencies, the error between the reference light power at different frequency points and the preset power is smaller than a set value, and the accurate measurement of the stress and the temperature is ensured.
Owner:NANJING UNIV

Method and device for full balance control of power battery of electric automobile

The invention discloses a method and a device for full balance control of a power battery of an electric automobile. In the method, an analog-digital conversion module of a microcontroller is used for acquiring single body voltage parameters of the power battery and sequencing the single body voltage parameters of the power battery; the microcontroller is connected with a battery management system to acquire dump energy information and battery balancing threshold of the current battery management system; and the method for the full balance control of the power battery of the electric automobile is implemented by the microcontroller according to the actual condition of the dump energy, or selecting an active balancing mode of starting an active balance control circuit and using an on-vehicle battery to charge the lowest battery single body, or selecting a passive balancing mode of starting a passive balance control circuit and using a balancing resistor to discharge the highest batterysingle body, or selecting a mixed balancing mode of using the two modes at the same time. By using the method and the device, a reasonable balancing strategy is established according to the dump energy of the battery, so that the problem of inconsistency of charge and discharge of the power battery is effectively solved and unnecessary electric energy consumption in balancing is effectively reduced.
Owner:QIMING INFORMATION TECH +1

Assembly line successive approximation type analog-digital converter self-calibration method and device

The invention discloses an assembly line successive approximation type analog-digital converter self-calibration method and device. The assembly line successive approximation type analog-digital converter self-calibration device comprises a first-stage successive approximation type analog-digital converter, a second-stage successive approximation type analog-digital converter, an operational amplifier and a digital calibration control logical circuit, wherein the first-stage successive approximation type analog-digital converter is used for completing data collection and analog-digital conversion on input signals, a pseudo random quantity with a known digital quantity is exerted on the first-stage successive approximation type analog-digital converter, the operational amplifier is used for amplifying remnant signals output by the first-stage successive approximation type analog-digital converter and transmitting the remnant signals to the second-stage successive approximation type analog-digital converter to conduct analog-digital conversion, and the digital calibration control logical circuit is used for conducting circulation calibration according to output and the pseudo random quantity of the first-stage successive approximation type analog-digital converter and the second-stage successive approximation type analog-digital converter to control gains of the operational amplifier, and obtaining data output. By means of the mode, the gains of the operational amplifier can be adjusted in real time, influences of factors such as the temperature and the supply voltage on the gains can be calibrated, and the effective accuracy of an ADC is accordingly improved.
Owner:HUAWEI TECH CO LTD

Electric vehicle power battery insulation resistance detection method and device

ActiveCN102298092AAccurately measure the degree of leakageSolve the problem of not being able to judge whether it is positive leakage or negative leakageResistance/reactance/impedenceElectrical testingPower batteryElectrical battery
The invention discloses a method and a device for detecting power battery insulation resistance of an electric automobile. Two circuits of universal input/output interfaces of a micro-controller are respectively and externally connected with positive and negative insulation switch circuits. Positive and negative insulation switch relays are gated. Insulation resistance sampling voltage is output. The sampling voltage is amplified by an operational amplifying circuit, isolated by a voltage isolation chip and input in an analogue-digital conversion unit of the micro-controller. An insulation resistance value of a current power battery is calculated by the micro-controller according to an algorithm, transmitted to a battery management system through a communication module in the form of message and used by the battery management system. According to the method and the device disclosed by the invention, the problem that positive leakage, positive leakage or positive and positive leakage cannot be judged by the traditional insulation resistance detection device is effectively solved; the leakage degree of the current power battery can be precisely measured; and potential safety hazards resulted from inaccuracy of the insulation resistance are stopped.
Owner:QIMING INFORMATION TECH +1
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