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30 results about "Field strength meter" patented technology
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In telecommunications, a field strength meter is an instrument that measures the electric field strength emanating from a transmitter.
Method and Apparatus for Detecting RF Field Strength
A method and apparatus for detecting RF field strength. A field strength reference generator develops a field strength reference current as a function of a field strength of a received RF signal; and a field strength quantizer develops a digital field-strength value indicative of the field strength reference current. In one embodiment, detected field strength is used to dynamically vary the impedance of a tank circuit whereby, over time, induced current is maximized. In another embodiment, using the quantized field strength to sense changes to the environment to which the RFID tag is exposed.
Owner:RFMICRON
Method and Apparatus for Detecting RF Field Strength
A method and apparatus for detecting RF field strength. A field strength reference generator develops a field strength reference current as a function of a field strength of a received RF signal; and a field strength quantizer develops a digital field-strength value indicative of the field strength reference current. In one embodiment, detected field strength is used to dynamically vary the impedance of a tank circuit whereby, over time, induced current is maximized.
Owner:RFMICRON
Test device and test method for broadband radiated immunity of vehicle display device as well as application
InactiveCN103217607ARealize real-time online monitoringImprove technical levelElectrical testingVideo monitoringDisplay device
The invention discloses a test device and a test method for broadband radiated immunity of a vehicle display device as well as application. The test device is provided with a radio frequency interference signal source, a first coaxial radio frequency switch, a low-frequency section power amplifier, a high-frequency section power amplifier, a forward power meter, a backward power meter, a second coaxial radio frequency switch, a third coaxial radio frequency switch, a first oriented coupler, a second oriented coupler, a fourth coaxial radio frequency switch, a 20MHz-200MHz low-frequency bi-conical antenna, a log antenna, a horn antenna, a field strength meter, a camera, a high-speed image acquisition card, a radio frequency switch control module, a serial port expansion card, a control host machine, a GPIB (general purpose interface bus) interface card and the vehicle display device. During testing, a broadband radio frequency interference signal is generated by a radio frequency interference signal source, the control host machine is used for judging the frequency section of the frequency of the interference signal, on the basis of the frequency section, the control host machine is used for controlling the radio frequency switch control module to automatically switch the coaxial radio frequency switches, so that the radio frequency signal source is enabled to be connected with the corresponding power amplifier and the corresponding antenna, and the forward power meter, the backward power meter and a video monitoring device are respectively used for the online monitoring of the testing field strength and the working state of tested equipment.
Owner:FUJIAN INSPECTION & RES INST FOR PROD QUALITY
Method and magnetic resonance system for adjustment of the field strength of RF pulses
InactiveCN1987510AMagnetic property measurementsDiagnostic recording/measuringResonance measurementSpatially resolved
In a method for adjustment of the field strength of radio-frequency pulses as well as a magnetic resonance measurement system, radio-frequency pulses are emitted by a radio-frequency antenna of a magnetic resonance measurement system in a magnetic resonance measurement A test volume slice is initially excited by emission of radio-frequency pulses with a defined pulse amplitude by the appertaining radio-frequency antenna and one-dimensional, spatially-resolved characteristic values are determined along an extent direction of the test volume slice. The one-dimensional, spatially-resolved characteristic values respectively represent a local field strength of the B1 field in strips of the test volume slice running perpendicular to the extent direction. An average value of the determined characteristic values is then formed over at least over one determined segment along the extent direction of the test volume slice. A pulse amplitude of the radio-frequency pulses that is to be set for the magnetic resonance measurement to be implemented is determined on the basis of the average value.
Owner:SIEMENS HEALTHCARE GMBH
Circuit simulation model for radio frequency identification system
InactiveCN102184442AReduce wafer costShorten the development cycleRecord carriers used with machinesParasitic capacitorCapacitance
The invention discloses a circuit simulation model for a radio frequency identification system, which is used for evaluating the function and the performance of a radio frequency identification tag chip. The circuit simulation model comprises a reader model for simulating the equivalent circuit of an actual reader and generating a 100 percent amplitude shift keying (ASK) modulating signal, a tag card model for simulating the equivalent circuit of an entire tag card which actually comprises a tag chip, a sensing coil model for simulating the equivalent circuits of a printed circuit board (PCB) coil, an oscilloscope and a spectrum analyzer which actually test the depth of a subcarrier load modulation sideband, and a field intensity meter model for simulating the equivalent circuit of an actual field intensity meter. The reader model comprises a 100 percent ASK modulating signal generating circuit, a source impedor, a reader antenna matching network, a reader coil antenna and a reader antenna impedor; the tag card model comprises an on-card antenna inductor, a parasitic resistor, a card parasitic capacitor, a simulated front end circuit and a numerical equivalent load; the sensing coil model comprises two sensing coils, a coil resistor and a spectrum analyzer probe model; and the field intensity meter model comprises a coil inductor and a parasitic capacitor and a parasitic resistor thereof.
Owner:GUANGZHOU SYSUR MICROELECTRONICS
Electric energy meter table remote calibration device and automatic calibration method
InactiveCN106940434AReal-time trackingReal-time judgment of out-of-toleranceElectrical measurementsPrimary stationThree-phase
The invention discloses an electric energy meter table remote calibration device and an automatic calibration method; the electric energy meter table remote calibration device comprises a data processing platform (1), a data receive main station (2), a data receive slave station (3), a three-phase standard electric energy meter (5), a single-phase standard electric energy meter (6) and a magnetic field intensity meter (8); the data processing platform (1) and the data receive main station (2) are connected through the Ethernet; the data receive main station (2) and the data receive slave station (3) are connected through the Ethernet; the data receive slave station (3) is connected with a relay (4) through a wireless mode; the three-phase standard electric energy meter (5) and the single-phase standard electric energy meter (6) are arranged on an electric energy metering standard calibration table (7), and connected with the relay (4) in a wireless mode; the magnetic field intensity meter (8) is arranged in a position 1-3 meters away from the electric energy metering standard calibration table (7); the invention also discloses the automatic calibration method, and aims to solve the problems that a conventional electric energy metering management mode is poor in information communication, regular device calibration caused by geography dispersion wastes manpower and materials, and the work efficiency is low.
Owner:ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
Method and Apparatus for Sensing Environment Using a Wireless Passive Sensor
ActiveUS20160188927A1Preventing numberNear-field transmissionSubscribers indirect connectionRf fieldReference current
A method and apparatus for detecting RF field strength. A field strength reference generator develops a field strength reference current as a function of a field strength of a received RF signal; and a field strength quantizer develops a digital field-strength value indicative of the field strength reference current. In one embodiment, detected field strength is used to dynamically vary the impedance of a tank circuit whereby, over time, induced current is maximized. In another embodiment, the quantized field strength is used to sense changes to the environment to which the RFID tag is exposed. In yet another embodiment, dynamic variations of the quantized impedance of the tank circuit are used to sense changes in the environment. Several alternate antennas are specially adapted to facilitate sensing of environmental conditions using the RFID tag.
Owner:RFMICRON
Model correcting device used for communication electronic device simulation test
InactiveCN105929255AImprove stabilityReduce complex stepsTransmission monitoringAntenna radiation diagramsAudio power amplifierCarrier signal
The invention relates to a model correcting device used for communication electronic device simulation test. The device comprises carrier vehicles which are respectively placed at a launching point and a receiving point. The launching point carrier vehicle is provided with a carrier generator and a power amplifier, wherein the carrier generator and the power amplifier are connected through a radio frequency cable. The launching point carrier vehicle is provided with a standard gain antenna I which is connected with the power amplifier through a radio frequency feeder. The receiving point carrier vehicle is provided with a field strength instrument. The receiving point carrier vehicle is provided with a standard gain antenna II which is connected with the field strength instrument through a radio frequency feeder. According to the invention, the carrier generator is used as a radio frequency signal source; a carrier radio frequency signal which is outputted by the carrier generator is amplified by the power amplifier, and is finally transmitted through an antenna; and the carrier generator is used as the radio frequency signal source, which reduces the device cost, improves the smoothness of signal transmission, and can reduce measurement errors.
Owner:NO 63888 TROOPS OF CHINESE PEOPLES LIBERATION ARMY
Method for improving electronic equipment radiated susceptibility test repeatability in reverberation room constant stirring mode
ActiveCN104297595AIncreased Radiation Sensitivity ThresholdElectrical testingEquipment under testEngineering
Owner:PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
Portable field strength measuring instrument of DMB
InactiveCN108375699AAccurate measurementEasy to measureElectromagentic field characteristicsMicrocontrollerAudio power amplifier
The invention relates to a portable field strength measuring instrument of digital multimedia broadcasting (DMB). The portable field strength measuring instrument is composed of a signal interface, afilter, a multi-level logarithmic amplifier, a microcontroller and a USB interface. The input terminal of the signal interface is connected to a DMB device and the signal interface is used for receiving DMB broadcast transmitting signals. The input terminal of the filter is connected to the output terminal of the signal interface to filter an interference signal among the received DMB broadcast transmitting signals; and the output terminal of the filter is connected to the input terminal of the multi-level logarithmic amplifier to convert the DMB broadcast transmitting signals from radio-frequency signals to voltage signals. The input terminal of the microcontroller is connected to the output terminal of the multi-level logarithmic amplifier to carry out data processing on the voltage signals; and the microcontroller carries out data outputting through the USB interface and the field strength measuring instrument provides power through the USB interface. Therefore, the defects of complicated structure, high price, large weight and large volume, and low portability of the existing field strength instrument are overcome effectively; and the field strengths of the DMB broadcast transmitting signals in a range from -65dBm to 5dBm can be measured accurately.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Vehicle restriction method and device based on vehicle electronic mark
InactiveCN107481524AReduce troubleMaintain traffic orderArrangements for variable traffic instructionsElectronic identificationComputer terminal
The invention discloses a vehicle restriction method and device based on vehicle electronic marks, and a vehicle detection base station; the vehicle detection base station comprises the following units: video identification equipment, a vehicle electronic mark reader, and a field intensity meter used for detecting the field intensity of the vehicle electronic mark reader; a base station controller respectively connected with the video identification equipment, the vehicle electronic mark reader and the field intensity meter, and used for controlling the vehicle electronic mark reader to read the vehicle electronic mark information of the vehicle passing a detection area when the video identification equipment, the vehicle electronic mark reader and the field intensity meter are in a normal working mode, and enabling the command center to send the restriction vehicle license plate numbers to a driver mobile terminal communication module pre-bounded to the vehicle. The vehicle detection base station can timely inform the restriction vehicle information to the driver, so the driver can timely avoid the restriction areas, thus reducing troubles for the driver, and keeping a harmonious traffic order.
Owner:BEIJING E HUALU INFORMATION TECH +1
Rotatable electromagnetic field analyzer measuring device
PendingCN106872802ASolve the problem of inconvenient measurement and inaccurate test dataElectromagentic field characteristicsTransformerField strength meter
The invention discloses a rotatable electromagnetic field analyzer measuring device comprising an outer rod, an inner rod, a moving cross beam, a cross beam bracket, a field strength meter probe mounting rack, a field strength meter data line, a data line connector, a locking device, a field strength meter terminal placing bench, an installation base, an anti-skid pad, a locking pin and a snap fastener. The outer rod is installed at the installation base; one end of the inner rod is arranged at a sliding rail in the outer rod; the cross beam bracket is arranged at the position, approaching the top, of the outer side of the inner rod and s connected with the moving cross beam; the locking pin is arranged at the position, approaching the top, of the outer side of the outer rod; and the snap fastener is arranged at the field strength meter probe mounting rack. In the prior art, the field strength meter probe is arranged at a tripod and the tripod is moved to a needed position during the traditional measurement process; because of measuring point position restriction of some transformer substation sites, tripods can not be placed at some monitoring areas; and the traditional tripod can not be placed at a right place because the tripod only can be extended to the height of 1.5 meters and some measuring points are too high; and thus the measurement become inconvenient and testing data are not accurate. However, with the rotatable electromagnetic field analyzer measuring device, the problems of inconvenience in measurement and low accuracy of testing data can be solved.
Owner:GUIZHOU UNIV
GIS bus residual voltage measuring device and calculation method based on electric field
PendingCN113156184ASolve measurement problemsSolve computing problemsCurrent/voltage measurementCapacitanceDisplay device
The invention discloses a GIS bus residual voltage measuring device and calculation method based on an electric field. The measuring device comprises a sealed tank body surrounding a GIS bus; the GIS bus is supported in the tank body through an insulator; the tank body is filled with SF6 insulating gas; the tank body is provided with a visual observation window; the visual observation window is connected with a grounding metal plate through a supporting frame; an electric field space is formed between the lower end face of the grounding metal plate and the GIS bus through the observation window; and the lower end face of the grounding metal plate is fixedly provided with a field intensity meter which is connected with a voltage display. With the GIS bus residual voltage measuring device and calculation method based on the electric field of the invention adopted, the problem of measurement and calculation of the residual voltage of the GIS bus after the switching off of a gas insulation combination switch can be solved. The GIS bus residual voltage measuring device and calculation method based on the electric field can adapt to measurement of the residual voltage of the GIS bus in different amplitude ranges by adjusting the distance between the grounding metal plate and the GIS bus and calibrating the voltage of the GIS bus, and are different from a measuring method based on resistance voltage division and capacitance coupling.
Owner:ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER +1
Vehicle magnetic field frequency domain data measurement system
InactiveCN112540326AImprove test efficiencyImprove test accuracyThree-component magnetometersTime domainComputational physics
The invention discloses a vehicle magnetic field frequency domain data measurement system, which comprises a field intensity meter, an oscilloscope and an upper computer which are connected in sequence, wherein the field intensity meter is used for measuring the real-time signal intensity of a magnetic field environment where a vehicle is located when the vehicle runs and inputting the real-time signal intensity into the oscilloscope, the oscilloscope is used for reading real-time time domain data corresponding to the real-time signal intensity, carrying out frequency domain analysis on the real-time time domain data, and calibrating frequency parameters according to preset configuration in the frequency domain analysis process so as to output calibrated real-time frequency domain signal amplitude, and the upper computer is used for drawing a frequency domain curve according to preset configuration and the calibrated real-time frequency domain signal amplitude so as to acquire real-time frequency domain data of the vehicle from the frequency domain curve. According to the invention, the frequency domain data is calibrated according to the preset standard, and the frequency domain curve is formed on the upper computer according to the same standard, so that the calculation amount is reduced, the test efficiency is improved, and the real-time acquisition of the frequency domain data can be realized.
Owner:ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
Electromagnetic signal field strength meter
InactiveCN104808076AElectromagentic field characteristicsElectromagnetic shieldingField strength meter
The invention discloses an electromagnetic signal field strength meter. The electromagnetic signal field strength meter is characterized by comprising an electromagnetic signal receiving circuit, an electromagnetic signal voltage-multiplying detecting and filtering circuit and a sensitivity control and indication circuit. Detecting diodes D1 to D2 are model 1N60 in the electromagnetic signal detecting and filtering circuit. The electromagnetic signal field strength meter uses a 10 microampere meter head as a qualitative indication device and can be used for measuring electromagnetic signal field strength emitted by various miniature emitters and cellphones, and measurement results of the electromagnetic signal field strength can meet common technical requirements of measurement. The electromagnetic signal field strength meter has the advantages of simple circuit structure, high measurement sensitivity, stable operation performance, low manufacturing cost and the like.
Owner:王志
A high intensity field sensor calibration method
ActiveCN106483485BAvoid calibrationRealize value transferElectrical measurementsField methodsHigh intensity
Owner:BEIJING INST OF RADIO METROLOGY & MEASUREMENT
Terminal power detection device and method in positioning system and field intensity meter
PendingCN112954729AAnti-jamming reductionHigh positioning accuracyWireless communicationPropogation channels monitoringLow noiseNoise (radio)
The invention relates to a terminal power detection device in a positioning system, and the device comprises: an antenna which is used for receiving an air interface signal transmitted by a terminal; a low-noise amplifier which is used for performing low-noise amplification processing on the air interface signal; a filtering module which is used for carrying out frequency filtering on the air interface signal and reserving a specified frequency band in the air interface signal; a frequency shift module which is used for moving an air interface signal from radio frequency to a baseband; an analog-to-digital conversion module which is used for converting the air interface signal from an analog signal to a digital signal; and a logic processing module which is used for performing extraction, narrowband filtering, synchronous simplified operation and strategy processing on the air interface signal to obtain the power of the target terminal. The detection method is realized through the detection device. The field intensity meter comprises the detection device. According to the invention, the power of the terminal in the positioning system can be accurately obtained, so that the positioning system has strong anti-interference capability and high positioning precision.
Owner:广州彩频通信科技有限公司
Redistribution method of heavy doping boron silicon slice
ActiveCN103193195AFast heating rateLow costDecorative surface effectsChemical vapor deposition coatingElectromagnetic shieldingRadio frequency
The invention provides a redistribution method of a heavy doping boron silicon slice, and relates to a heavy doping boron silicon slice. The heavy doping boron silicon slice is placed on a tray, and then placed in a quartz chamber. The door of a screening box is closed. A seal mechanism is rotated and pressed tightly. The quartz chamber is vacuumized. Redistribution required gas is fed in the quartz chamber through a gas inlet and a gas outlet. The power is turned on. An electric field is applied in the space through an electrode slice. A radio-frequency power supply is started. The load matching is realized by an automatic matching unit, so that an induction coil produces a high-frequency changing magnetic field. A temperature sensor is started. The input power is adjusted to reach a required temperature by using the temperature indication of the temperature sensor. The heavy doping boron silicon slice is heated and the redistribution process starts. For ensuring operator safety, an electromagnetic shielding outer shell is arranged outside the electromagnetic induction coil. In the whole process of redistribution, an interference field strength meter is turned on to monitor field strength in a real-time manner, so that the field strength is within a relatively regulated range. The heating rate is fast, the cost is low, and the residual stress is effectively reduced.
Owner:XIAMEN UNIV
A calibration method for uhf partial discharge measuring device
The invention provides a method for calibrating a UHF partial discharge measurement device, which comprises the steps of 1, constructing a field strength measurement system; 2, placing the UHF partial discharge measurement device and a reference field strength meter in the field strength measurement system, and measuring the field strength of the same electric field; and 3, comparing output signals of the UHF partial discharge measurement device and the reference field strength meter, and determining the measurement accuracy of the UHF partial discharge measurement device. Compared with the prior art, the method provided by the invention for calibrating the UHF partial discharge measurement device avoids a problem that a radio frequency signal source is too great in attenuation in the measurement environment and difficult to be controlled through building a relatively stable electric field environment.
Owner:CHINA ELECTRIC POWER RES INST +4
Environment safety detection method
ActiveCN107294638APrevent leakageLow skill level requiredCommunication jammingSpectrum analyzerX-ray
The invention discloses an environment safety detection method. The method comprises a furniture detection step in which the furniture in a place is detected through a nonlinear node detector, an electric equipment detection step in which a field strength meter is adopted to detect the electric equipment in the place and a ground and wall detection step in which the ground and the wall in the place are detected through the nonlinear node detector. If a secret stealing device is detected to be possibly arranged in the furniture or the ground or the wall by the nonlinear node detector, an X ray machine is used to photograph the furniture or the ground or the wall, and whether the secret stealing device is arranged is determined. The detection method disclosed by the invention has high detection accuracy, equipment, which requires highly on the experience of a detector, such as a spectrum analyzer is not needed, and information safety in various places such as a secret-related place and ordinary places in need of preventing secret stealing can be ensured.
Owner:北京中密安信息安全技术有限公司
Field distribution data acquisition method and equipment
An embodiment of the invention provides a field distribution data acquisition method and equipment. The field distribution data acquisition method and the equipment are applied to an acquisition system which comprises a field intensity indicator and a plurality of cameras. The method includes steps: acquiring time related field intensity signals and frequency band information of each to-be-detected position through the field intensity indicator; aiming at each to-be-detected position, acquiring video data obtained by shooting the field intensity indicator at a same moment through the cameras,and determining probe position information when the field intensity indicator is at each to-be-detected position on the basis of the video data; generating field distribution data aiming at four-dimensional space of each to-be-detected position according to the position information, the time related field intensity signals and the frequency band information. Images are acquired by shooting the field intensity indicator through the cameras and recognized to determine accurate positioning information of the field intensity indicator, and the positioning information is integrated with the time related field intensity signals and the frequency band information detected by the field intensity indicator to generate intact field distribution data.
Owner:上海玄彩美科网络科技有限公司
A 5g NR uplink energy measurement method
ActiveCN113132898BPrecise positioningSignal allocationLocation information based serviceField strength meterResource allocation
The present invention provides a 5G NR uplink energy measurement method, including receiving the downlink wireless signal transmitted by the 5G NR mobile base station and the uplink wireless signal transmitted by the 5G target terminal; analyzing the downlink wireless signal to obtain the position of the NR downlink frame header and the 5G target terminal The uplink resource allocation information; based on the NR downlink frame header position and uplink resource allocation information, the uplink wireless signal is correlated in the frequency domain window to obtain the uplink energy of the 5G target terminal. Compared with the traditional field strength meter positioning method, the present invention uses the downlink wireless signal transmitted by the 5G NR mobile base station to analyze the PUSCH configuration information of the target terminal, and accurately calculates the uplink energy of the 5G target terminal. According to the uplink energy, the 5G target terminal Perform precise positioning.
Owner:武汉恒达安网信息技术有限公司
Multifunctional electromagnetic field strength meter
InactiveCN110672930AEasy to leaveInnovative designElectromagentic field characteristicsMeasurement instrument housingLiquid-crystal displayDisplay device
A multifunctional electromagnetic field strength meter is provided. The multifunctional electromagnetic field strength meter comprises a fixing device, an imaging device, and a detection device. The fixing device and the detection device are respectively connected with the imaging device; the fixing device comprises a base and a support rod; one end of the support rod is connected with the base, and the other end is connected with the imaging device; the imaging device comprises a housing; the housing is provided with a controller, a liquid crystal display, a keyboard, a speaker, and a data input terminal; the imaging device further comprises an alarm device; the alarm device comprises a speaker and LED indicators; the speaker and the LED indicators are respectively connected with the controller; and the speaker and the LED indicators can be used to determine whether a field strength signal is in a dangerous situation at the first time, so that workers can leave the test site in a facilitated manner and a safety detection factor of the test site is improved.
Owner:徐州长盛电力设备有限公司
A field distribution data acquisition method and device
The embodiment of the present invention proposes a field distribution data collection method and equipment, which are applied to a collection system including a field strength meter and multiple cameras; Strong signal and frequency band information; for each of the positions to be tested, obtain video data obtained by multiple cameras shooting the field strength meter at the same time, and determine the field strength meter at each of the positions to be tested based on the video data The position is the position information of the probe; the position information, and the time-related field strength signal and frequency band information are combined to generate field distribution data for the four-dimensional space where each position to be measured is located. The field strength meter is captured by the camera to obtain pictures, and the image is identified to determine the accurate positioning information of the field strength meter, and it is integrated with the time-related field strength signal and frequency band information detected by the field strength meter to generate a complete field strength distribution data.
Owner:上海玄彩美科网络科技有限公司
5G NR uplink energy measurement method
ActiveCN113132898APrecise positioningSignal allocationLocation information based serviceResource assignmentField strength meter
The invention provides a 5G NR uplink energy measurement method. The method comprises the following steps: receiving a downlink wireless signal transmitted by a 5G NR mobile base station and an uplink wireless signal transmitted by a 5G target terminal; analyzing the downlink wireless signal to obtain an NR downlink frame header position and uplink resource allocation information of a 5G target terminal; and on the basis of the NR downlink frame header position and the uplink resource allocation information, performing correlation calculation on the uplink wireless signal in the frequency domain window to obtain uplink energy of the 5G target terminal. Compared with a traditional field intensity meter positioning mode, the method has the advantages that the PUSCH configuration information of the target terminal is analyzed by using the downlink wireless signal transmitted by the 5G NR mobile base station, the uplink energy of the 5G target terminal is accurately calculated, and the 5G target terminal is accurately positioned according to the uplink energy.
Owner:武汉恒达安网信息技术有限公司
Electrodynamic field strength triggering system
Systems and methods for automatically triggering wireless power and data exchange between an external reader and an implanted sensor. The implanted sensor may measure the strength of an electrodynamic field received wirelessly from the reader and convey field strength data based on the measured strength of the received electrodynamic field to the reader. If the field strength data indicates that the strength of an electrodynamic field received by the sensor is sufficient for the implanted sensor to perform an analyte measurement, the reader may convey an analyte measurement command to the sensor, which may execute the analyte measurement command and convey measurement information back to the reader. The systems and methods may trigger the analyte measurement as the reader transiently passes within sufficient range / proximity to the implant (or vice versa).
Owner:SENSEONICS INC
Redistribution method of heavy doping boron silicon slice
ActiveCN103193195BFast heating rateLow costDecorative surface effectsChemical vapor deposition coatingEngineeringElectromagnetic shielding
The invention provides a redistribution method of a heavy doping boron silicon slice, and relates to a heavy doping boron silicon slice. The heavy doping boron silicon slice is placed on a tray, and then placed in a quartz chamber. The door of a screening box is closed. A seal mechanism is rotated and pressed tightly. The quartz chamber is vacuumized. Redistribution required gas is fed in the quartz chamber through a gas inlet and a gas outlet. The power is turned on. An electric field is applied in the space through an electrode slice. A radio-frequency power supply is started. The load matching is realized by an automatic matching unit, so that an induction coil produces a high-frequency changing magnetic field. A temperature sensor is started. The input power is adjusted to reach a required temperature by using the temperature indication of the temperature sensor. The heavy doping boron silicon slice is heated and the redistribution process starts. For ensuring operator safety, an electromagnetic shielding outer shell is arranged outside the electromagnetic induction coil. In the whole process of redistribution, an interference field strength meter is turned on to monitor field strength in a real-time manner, so that the field strength is within a relatively regulated range. The heating rate is fast, the cost is low, and the residual stress is effectively reduced.
Owner:XIAMEN UNIV
Test method for wideband radiated immunity test device of on-board display
InactiveCN103217607BRealize online monitoring of working statusImprove technical levelElectrical testingVideo monitoringOn board
The invention discloses a test device and a test method for broadband radiated immunity of a vehicle display device as well as application. The test device is provided with a radio frequency interference signal source, a first coaxial radio frequency switch, a low-frequency section power amplifier, a high-frequency section power amplifier, a forward power meter, a backward power meter, a second coaxial radio frequency switch, a third coaxial radio frequency switch, a first oriented coupler, a second oriented coupler, a fourth coaxial radio frequency switch, a 20MHz-200MHz low-frequency bi-conical antenna, a log antenna, a horn antenna, a field strength meter, a camera, a high-speed image acquisition card, a radio frequency switch control module, a serial port expansion card, a control host machine, a GPIB (general purpose interface bus) interface card and the vehicle display device. During testing, a broadband radio frequency interference signal is generated by a radio frequency interference signal source, the control host machine is used for judging the frequency section of the frequency of the interference signal, on the basis of the frequency section, the control host machine is used for controlling the radio frequency switch control module to automatically switch the coaxial radio frequency switches, so that the radio frequency signal source is enabled to be connected with the corresponding power amplifier and the corresponding antenna, and the forward power meter, the backward power meter and a video monitoring device are respectively used for the online monitoring of the testing field strength and the working state of tested equipment.
Owner:FUJIAN INSPECTION & RES INST FOR PROD QUALITY
Field strength test starting equipment
ActiveCN103743957BEasy to operateEasy to carryElectromagentic field characteristicsCarrier signalSite location
The invention relates to a field intensity test starter comprising a control unit, an operation display unit and a channel machine unit. The control unit is formed by connecting a CPU, a first filter adjusting circuit, a second filter adjusting circuit, an operational amplifier and a power conversion circuit. The CPU of the field intensity test starter generates 218.1Hz sub audio and a FFSK signaling containing site location and emission time, and the sub audio and the signaling are emitted through a PTT control channel machine. The FFSK and the 218.1Hz signals are generated inside a program control CPU, the FFSK signal is filtered and shaped by an active filter C, a digital potentiometer A adjusts the amplitude of the FFSK signal, the 218.1Hz sub audio signal is filtered and shaped by an active filter D, a digital potentiometer B adjusts the amplitude of the 218.1Hz sub audio signal, and the FFSK signal and the 218.1Hz sub audio signal are further adjusted by the operational amplifier. The field intensity test start device has the following beneficial effects: station radios along the way can emit field intensity test carriers under the control of the device at a specified time, and the device can be compatible with standard B and C systems, is simple to operate, convenient to carry and low in cost, and can satisfy field needs.
Owner:TIANJIN 712 COMM & BROADCASTING CO LTD
Remote control anti-interference vehicle-mounted electromagnetic radiation monitoring system
PendingCN113834972ARapid Regional Electromagnetic Radiation Level SurveyEfficient Regional Electromagnetic Radiation Level SurveyElectromagentic field characteristicsRemote controlIn vehicle
The invention provides a remote-control anti-interference vehicle-mounted electromagnetic radiation monitoring system, and relates to the field of environmental electromagnetic radiation monitoring, and the system comprises a compartment equipment installation carrier disposed at the top of an electromagnetic vehicle, and a first electromagnetic radiation comprehensive field intensity meter and a frequency-selecting electromagnetic radiation analyzer which are disposed in the compartment equipment installation carrier; a controller, in communication connection with the first electromagnetic radiation comprehensive field intensity meter and the frequency-selecting electromagnetic radiation analyzer. The system also comprises a remote server in communication connection with the controller; and a blind spot supplementary measurement system, folded and stored in the compartment body equipment mounting carrier and in communication connection with the remote server. According to the system, regional electromagnetic radiation level investigation can be completed quickly, efficiently and accurately, and a data basis is provided for regional mobile communication base station environmental impact evaluation, base station co-construction and sharing and urban radio planning and deployment.
Owner:广东省环境辐射监测中心 +1
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