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604 results about "Active measurement" patented technology

Active measurements means that the transmitter/receiver in the DUT is active and powered up. Active measurements will give you a complete overview of how the whole system in your device is performing. These are parameters directly related to the antenna radiation efficiency,

Sensor fault diagnosis device and method and signal acquisition system of sensors

The invention discloses a fault diagnosis device and method of sensor acquisition modules and a signal acquisition system of sensors. The sensor fault diagnosis device comprises a first sensor acquisition module, a second sensor acquisition module and a difference value comparing module, wherein the first sensor acquisition module is used for acquiring and outputting a first parameter signal through a first sensor, the second sensor acquisition module is used for acquiring and outputting a second parameter signal through a second sensor, the difference value comparing module is used for calculating the absolute value of the difference between the first parameter signal and the second parameter signal, and comparing the absolute value of the difference with a preset threshold value, and when the absolute value of the difference is larger than the preset threshold value, at least one of the first sensor acquisition module and the second sensor acquisition module is judged to break down. When the values of the signals acquired by the sensors largely deviate from an actual value but are in the acquired effective measurement range, the sensor fault diagnosis device and method can accurately judge whether the sensor acquisition modules break down, and improves the accuracy of fault diagnosis.
Owner:CHINA AVIATION POWER MACHINE INST

Multi-function sensor and heat current and temperature measuring method under high temperature

ActiveCN101571428AEfficient measurementMake up for the problem of not being able to measure temperatureThermometers using electric/magnetic elementsUsing electrical meansHeat flowHeat current
The invention discloses a multi-function sensor and a heat current and temperature measuring method under high temperature, wherein the multi-function sensor comprises a shell and a heat current measuring head, the heat current measuring head is arranged on the shell and comprises a heat current probe and a heat sink, the heat sink and the heat current probe are connected and holded in the shell to form a thermoelectric couple with the heat current probe, a cooling device used for cooling the heat current measuring head and another thermoelectric couple used for measuring the temperature of the heat sink are also arranged in the shell, the two thermoelectric couples are connected with a surveymeter, and the detection of heat current and temperature is realized by measuring the voltage signal of the two thermoelectric couples. In the measuring method disclosed by the invention, a mathematical model is built to derive and obtain high temperature to be measured by measuring low temperature. The multi-function sensor of the invention can measure heat current and temperature in high temperature environment, overcomes the problem that temperature can not be measured under high temperature environment when the original thermoelectric couple is more than 2000K; not only can the heat current be measured, but also the thermoelectric couple can be ensured to work under high temperature environment, thus the temperature is effectively measured.
Owner:INST OF MECHANICS - CHINESE ACAD OF SCI

Trusted computing platform of a computing and protection parallel double-system structure

ActiveCN109871695AComputable, measurable and controllableRealize active security protectionPlatform integrity maintainanceActive safetyTrusted Computing
The invention discloses a trusted computing platform of a computing and protection parallel double-system structure. wherein the trusted computing platform comprises a computing subsystem and a protection subsystem which are parallel, the computing subsystem is used for completing a computing task, and the protection subsystem is used for carrying out active measurement and active control on the computing subsystem according to a trusted strategy through a trusted platform control module; And the protection subsystem is specifically used for respectively carrying out static measurement and dynamic measurement on the computing subsystem through the trusted software base. According to the trusted computing platform provided by the invention, active safety protection is realized while computing is realized through the computing subsystem and the protection subsystem which are parallel to each other. In addition to establishing a static trust chain which takes a trusted platform control module as a trust root for step-by-step measurement, a dynamic measurement mechanism based on a security trusted strategy is also designed, and active defense on the whole computer system in the starting and operating processes of the computer is realized.
Owner:北京自主可信科技有限公司

Programmable control SDN measuring system and method

The invention discloses a programmable control SDN measuring system and a processing method. According to the programmable control SDN measuring system, on the basis of a network controller of a network control layer and a bottom-layer switch of a data transmission layer, two components are additionally arranged on a network application layer, the two components comprise a programmable control measuring component in charge of centralized management of measuring tasks and an adaptive module used for supporting the measuring component, and the bottom-layer switch is improved to be a programmable control switch in charge of specific execution of the measuring tasks. In this way, the programmable control measuring component and the programmable control switch form a control loop for network measurement. The programmable control SDN measuring system is simple in structure, easy to obtain and flexible in configuration and has powerful functions, a programmable control measuring system and method can be provided according to various network measurement algorithms and different measuring tasks, and the characteristics that an SDN can be defined by software, control and forwarding are separated from each other and an active measurement mode is adopted are brought into full play. The programmable control SDN measuring system and the processing method have good popularization and application prospect.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Dynamic measurement method based on a dual-architecture trusted computing platform

ActiveCN109918915AImplement static metricsRealize measurable and controllableInternal/peripheral component protectionPlatform integrity maintainanceComputer hardwareControl layer
The invention discloses a dynamic measurement method based on a trusted computing platform with a double-system structure. The trusted computing platform comprises a computing subsystem and a protection subsystem which are parallel. The computing subsystem is used for completing a computing task, and the protection subsystem is used for carrying out active measurement and active control on the computing subsystem according to a trusted strategy through a trusted platform control module. The dynamic measurement method comprises the steps that in the operation process of a computing subsystem, when the triggering condition of dynamic measurement is met. A protection subsystem conducts dynamic measurement on the computing subsystem through a control layer in a credible software base accordingto a credible strategy and obtained related information executed by an application in the computing subsystem. The dynamic measurement method provided by the invention is based on a trusted computingplatform with a dual-system structure, and utilizes the dynamic measurement method to dynamically measure the related information executed by the application in the operation process of the computingsubsystem, so that the whole process of the computing subsystem is measurable and controllable, and the safety performance of the computing subsystem is improved.
Owner:沈昌祥

Non-contact wheel set dimension online detection method and device based on various sensors

The invention discloses a non-contact wheel set dimension online detection method and device based on various sensors. The device comprises the two laser displacement sensors symmetrically arranged on the inner side and the outer side of a track, and the two eddy current displacement sensors arranged on the inner side of the tract. The method comprises the steps that the two laser displacement sensors detect and obtain tread contour lines, and the rim height and the rim thickness are calculated through the extracted tread contour lines according to the geometric relation; the two eddy current displacement sensors are used for detecting the distances to the vertexes of the rims in the vertical direction, measurement data of the three sensors on the inner side of the track are extracted at the moment when wheels pass through the effective measurement range of the eddy current displacement sensors and the laser displacement sensors on the inner side of the rack simultaneously, the diameters of the vertex circles of the rims are calculated according to the measurement data and the geometric relation, and then the diameters of the wheels are calculated according to the wheel rim height. The non-contact wheel set dimension online detection method and device based on various sensors have the advantages that the measurement principle is simple and practical, cost is low, and precision is high; non-contact and real-time measurement can be achieved.
Owner:NANJING UNIV OF SCI & TECH
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