446 results about "Radiation monitoring" patented technology

An electronic circuit having radiation monitoring capability is disclosed. Radiation, such as ultraviolet (UV) radiation, infrared (IR) radiation or light, can be measured by the electronic circuit. The measured radiation can then be used in providing radiation-related information to a user of the electronic circuit. In one implementation, the electronic circuit is provided within eyewear so that the user of the eyewear is able to easily monitor their exposure to radiation.

A radiation monitoring system for detecting levels of radiation emitted from moving objects traveling at a wide range of speeds, including the high speeds normally encountered with vehicles traveling on highways, interstates, thoroughfares, railroads and conveyors. At least two and preferably three ionizing radiation detectors are employed, spaced apart in series along the direction of travel of the moving object or vehicle. The object or vehicle is monitored for radioactivity and the results are transmitted and processed at a central location. The individual results from each detector for a particular object or vehicle are summed and averaged over the number of detectors used thereby clearly distinguishing the fluctuating background radiation detected at each detector from the consistent high levels of radiation detected from those moving objects or vehicles measured emitting radiation. The results are cooperatively linked by an identification system such as a web cam or other photographic device which obtains visual identification of the objects and vehicles emitting the abnormally high levels of radiation detected.

The present invention relates to a method for assisting with percutaneous interventions, wherein 2D x-ray images of an object region are recorded before the intervention using a C-arm x-ray system or a robot-based x-ray system at different projection angles and 3D x-ray image data of the object region is reconstructed from the 2D x-ray recordings. One or more 2D or 3D ultrasound images are recorded before and/or during the intervention using an external ultrasound system and registered with the 3D image data. The 2D or 3D ultrasound images are then overlaid with the 3D image data record or a target region segmented therefrom or displayed next to one another in the same perspective. The method allows a puncture or biopsy to be monitored with a low level of radiation.

The present invention provides a system, device, computer program product and article for a telepositional dosimeter (TPD) and a radiation measurement system (RMS) having one or more TPDs capable of communicating environmental radiation measurements to a network, database or other data management technology. The present invention combines radiation measurement technology, wireless network and mobile communication technology, software, and related technologies to enable applications in various environments including the areas of environmental protection, homeland security, anti-terrorism, nuclear safety, radiation material handling and safety, and emergency response.

Eyewear having radiation monitoring capability is disclosed. Radiation, such as ultraviolet (UV) radiation, infrared (IR) radiation or light, can be measured by a detector. The measured radiation can then be used in providing radiation-related information to a user of the eyewear. Advantageously, the user of the eyewear is able to easily monitor their exposure to radiation.

Apparatus and methods for measuring gamma ray energy spectra wherein the gain of the measurement system is continuously and automatically adjusted to a standard gain. Gain of the system is controlled automatically through analysis of the measured energy spectra. Alternately, the gain of the system is controlled by the use of a calibration source and the operation of the system at a standard and amplified gain. Gain control can be improved further by combining both the spectral analysis and calibration source methodology. The system can be embodied in a wireline or logging-while-drilling borehole logging systems that measure naturally occurring or induced gamma ray spectra. The system can also be used in non-borehole applications including non-borehole gamma ray spectral systems such as computer-aided-tomography scan systems, security scanning systems, radiation monitoring systems, process control systems, analytical measurement systems using activation analysis methodology, and the like.

In some embodiments, radiation may be detected by emitting photons responsive to the radiation at a first location, and transporting the photons to provide an indication of photon presence at the second location. In some embodiments, operations may include generating a current at a first location by receiving radiation from a source at a semiconductor junction, and transporting the current to provide an indication of source presence at the second location.

At least one pair of hodoscope radiation monitors arranged to simultaneously monitor a target region that contains a source of radiation. The hodoscopes are preferably arranged so that their fields of view of the region are approximately orthogonal. The fields of view of the two detectors will overlap in a region that contains the source of radiation. Each of the two detectors will record radiation from the overlap region and, in addition, will record background radiation emanating from other regions within detector fields of view. The present invention provides statistical correlation techniques to estimate the extent to which unusually high radiation originates in the overlap region, irrespective of background in the field-of-view of individual hodoscope detectors. The source of radiation might be spontaneous, might be from an activation process, or might be scattered in from an external beam.

A dynamic radiation monitor having a detector coupled to a computer to determine at any given location, the amount of time a person has before a pre-selected maximum permissible radiation exposure is received. The device dynamically calculates and outputs the user's permissible stay time for a given area based on a personalized maximum permissible dose, and adjusts in real time the output based on elapsed time and changing exposure rate. The device also provides the user audio and visual feedback such as varying background colors for different stay time ranges.

The invention discloses a comprehensive control method for rockburst in a multiple-coalbed mining mine. According to the method, rockburst is controlled by employing two-side blasting for pressure relief, pressure-relief chamber establishment and coalbed high-pressure water injection according to monitoring data. The source of the monitoring data comprises electromagnet radiation monitoring, drilling-cutting-method pulverized coal monitoring, mine pressure monitoring and micro-seismic monitoring system monitoring. Two-side blasting for pressure relief means that during tunneling of upper gangway and lower gangway of a working face, following closely the tunneled working face, deep-hole pressure-relief blasting is arranged to the lower side of the upper gangway and the upper side and the slower side of the lower gangway. Pressure-relief chamber establishment means that the pressure-relief chambers are disposed on the lower side of the upper gangway and the upper side and the lower side of the lower gangway every 40 meters during tunneling. The coalbed high-pressure water injection means that advance water injection accompanied by coalbed high-pressure water injection is carried out on the upper sides and the lower sides of the gangways and in the pressure-relief chambers for rockburst control. According to the method of the invention, multiple methods are used for comprehensive forecasting, so that the rockburst control level is improved, the loss caused by rockburst is effectively reduces, and thus the pertinence and the effectiveness of the rockburst control are substantially enhanced.

Embodiments of the invention disclose a radioactive detection system and a radioactive detection method, and relate to the technical field of radiation monitoring. By adopting the system and the method, personnel do not need to approach or enter a radiation area or suspected radiation area with an instrument in hand for detection just like that in a traditional measurement method, and the risk is reduced. The system is composed of an unmanned rotor aircraft and a ground control terminal. The unmanned rotor aircraft comprises an unmanned rotor flying platform, and a radiation measuring platform borne on the unmanned rotor flying platform. The radiation measuring platform comprises a storage module used to store all measurement data and detection results, an energy spectrum detection module used to acquire energy spectrum information in a current environment, a multi-channel analysis module used to preliminarily process the energy spectrum information, a data processing module used to integrate and package location information, preliminary processing result data and dose rate monitoring information, and a wireless radio-frequency transmission module used to send a data packet to the ground control terminal. The radioactive detection system and the radioactive detection method of the invention are suitable for remotely detecting the radiation dose rate.

Radiation detector (1) for measuring one or more characteristics of a radiation, comprising one or more detector pixels (3), a clock pulse generator, each detector pixel (3) comprising a sensor (20) producing an electrical signal in response to an event of a photon or charged particle of said radiation impinging on said sensor (20); a pixel electronics (24) adapted for receiving and processing said electrical signal, comprising an analog processing unit (62) for amplifying and shaping said electrical signal and producing a shaped pulse said pixel electronics (24) comprises time determination unit (51) for counting the TOT-count, the TOT-count being the number of clock pulses occurring during the time interval when said shaped pulse is above a threshold. Said pixel electronics comprises a plurality of event counters (82), each event counter (82) counting the number of events having a TOT-count in a predefined ranges.

A network enabled radiation detection system includes a sensor configured for measuring radiation; a microprocessor configured for receiving data from the sensor related to radiation; memory operatively associated with the microprocessor; software code configured for time stamping data related to radiation, and for storing data, subsequent to time stamping, in the memory; and wireless communication equipment configured for transmitting a message with the data related to radiation to another device. A method of monitoring radiation with a network enabled radiation detection system includes measuring radiation with a sensor; receiving data into a microprocessor related to the radiation; time stamping the data related to radiation; storing the data in memory; and transmitting the data to a base station.

An XRF analysis apparatus includes a housing with a source of penetrating radiation to be directed at a sample and a detector for detecting fluoresced radiation from the sample. A shield is attachable to the housing to protect the user from radiation and a safety interlock is configured to detect whether or not the shield is attached to the housing. A controller is responsive to the safety interlock, and configured to monitor usage of the source of radiation at or above a predetermined power level when the shield is not attached to the housing and provide an output signal when the monitored usage of the source of penetrating radiation at or above the predetermined power level without the shield attached to the housing exceeds one or more predetermined thresholds.

By using a scintillation surveymeter with good calibration performance evaluation for a secondary standard radiation field, and a working standard part obtaining an ambient dose equivalent rate, in cooperation with a portable irradiator, and an irradiator lifter, a laser range finder and a laser locator of a relevant radiation source, in-situ calibration is capable of being performed on fixed, or large-scale, or continuous monitoring type radiation monitors to be calibrated stationed in nuclear power plants, nuclear medical departments, and other nuclear facility operating institutions. Moreover, a time-efficient and effective in-situ calibration method is further provided, which can be performed based upon a standard calibration field that is achieved using a portable ¹³⁷Cs radiation source. The in-situ calibration method is capable of saving the trouble of delivering large-scale monitors, or monitors difficult to move, or monitors requiring continuous monitoring to calibration laboratories for scheduled calibration.

The invention discloses a hydraulic fracture and microwave radiation combined coal bed gas enhanced extraction device and method, and belongs to surface borehole coal bed gas extraction devices and methods. A sleeve is arranged in a borehole fixing section, the lower end of the sleeve is provided with a high-strength nonmetallic screen pipe, and the upper portion of the sleeve is provided with a hydraulic facture opening, a gas extraction opening and a microwave radiation monitoring opening; a water pump is connected with the hydraulic fracture opening through a water tank and a pipeline, and a hydraulic fracture opening valve is arranged on the hydraulic fracture opening; a gas extraction opening valve is arranged on the gas extraction opening; a signal transmission line, a waveguide pipe and a microwave radiation monitoring opening valve are arranged on the microwave radiation monitoring opening, one end of the signal transmission line is connected with a monitoring device, and the other end of the signal transmission line is connected with a sensor; one end of the waveguide pipe is connected with a microwave radiator through a waveguide pipe valve, and the other end of the waveguide pipe is connected with a microwave radiation antenna and a microwave radiation window. Through the combined effect of hydraulic fracture and microwave radiation, coal bed permeation is achieved, the desorption efficiency of coal bed gas is improved, and high-efficiency extraction of coal bed gas is promoted.

The invention belongs to the technical field of nuclear radiation measurement and automatic control, and particularly relates to a nuclear power plant digital radiation monitoring system. The system comprises multiple radiation monitoring channels; each radiation monitoring channel is connected with a data network digital control system of a nuclear power plant; the radiation monitoring channel comprises a detector; the detector is connected with an on-site processing box through a cable; the on-site processing box is provided with an RS485 communication port, an RS232 communication port, an analog input/output port and an on-off input/output port; and the ports of the on-site processing box are connected with the data network digital control system of the nuclear power plant through a terminal junction box. Through the nuclear power plant digital radiation monitoring system provided by the invention, the automatic level of the radiation monitoring equipment is improved, the equipment investment and the field workload are saved, the analysis of operators to the radiation data is facilitated, and the operation safety of the power plant is improved.

A gate radiation monitoring system and method for instant gamma analysis on passing by objects is related to two photomultiplier tubes respectively installed at the two ends of the column plastic scintillation detectors. By use of precise high frequency clock with period about 10 nsec, the analog pulse signals from the all photomultiplier tubes which respond the ionizing gamma events of the plastic scintillation detectors can be converted into logic signals by the discrimination circuit. The continuous timing records can be built in sync. for all PMTs by personal computer. It has been proved that through the present invention, conventional gate detector can be applied to quick determination of the surface radiation intensity, the energy and location of the gamma emitters contained in the detected objects.

The invention relates to a digital nuclear facility environmental radiation monitoring system. The digital nuclear facility environmental radiation monitoring system comprises a control device and field measuring devices. The control device comprises a central station. The field measuring devices include an environmental medium sampler, a meteorological sensor and a radiation detector. The radiation detector is a digital NaI (TI) spectrometer internally provided with a high-range dosage rate detector. The environmental medium sampler, the meteorological sensor and the digital NaI (TI) spectrometer are connected with a local industrial computer, measuring signals and sampling signals are transmitted to the local industrial computer which is connected with the central station in a wired communication mode and in a wireless communication mode, and the central station remotely monitors the working state of all the field measuring devices. According to the system, nuclide recognition can be carried out while a radiation dose rate gamma is given, communication is reliable, the bandwidth is high, interference is not likely to happen, and the data acquiring rate of the system can be guaranteed.

The invention relates to the field of radiation protection and provides a multi-channel gas sampling radiation monitoring device and a working method thereof. A PLC (Programmable Logic Controller) control box is utilized to control a solenoid valve for cyclically achieving on-off control of a plurality of sampling channels, a program is made for enabling different gas sampling channels in different time periods to sample gas to be measured in different regions, sample gas is fed into a radiation detector at the rear end of the device, and the radioactive content of the sample gas is measured. The device is simple in structure, convenient to operate, efficient and easy to maintain, can be used for performing gas sampling on multiple regions of relevant nuclear places and measuring the radioactive content by the radiation detector, and effectively solves the difficult real use problems of a great number of required equipment, high fund amount, space occupation, difficulty for management and maintenance, and the like in multi-channel gas sampling radiation monitoring.

The invention discloses a detector device for radiation monitoring, which comprises an ionization chamber part comprising a shell and an electrode part, a circuit part processing electric signals from the electrode part, and a metal seal box, wherein the circuit part is arranged in the metal seal box. Besides, a spherical gas filled ionization chamber, a signal amplification/data processing circuit, the metal seal box and other parts are all arranged in an insulating cover so as to further improve the adaptivity of the whole detector device to severe environment. Moreover, the outer layer of the insulating cover is plated with a conductive film, thereby achieving the electromagnetic shielding effect, improving the electromagnetic interference resistance of the signal amplification/data processing circuit, ensuring the stable performance and improving the measuring accuracy.