383 results about "Gaseous detectors" patented technology

The invention provides methods and apparatus for detecting radiation including x-ray photon (including gamma ray photon) and particle radiation for radiographic imaging (including conventional CT and radiation therapy portal and CT), nuclear medicine, material composition analysis, container inspection, mine detection, remediation, high energy physics, and astronomy. This invention provides novel face-on, edge-on, edge-on sub-aperture resolution (SAR), and face-on SAR scintillator detectors, designs and systems for enhanced slit and slot scan radiographic imaging suitable for medical, industrial, Homeland Security, and scientific applications. Some of these detector designs are readily extended for use as area detectors, including cross-coupled arrays, gas detectors, and Compton gamma cameras. Energy integration, photon counting, and limited energy resolution readout capabilities are described. Continuous slit and slot designs as well as sub-slit and sub-slot geometries are described, permitting the use of modular detectors.

A warning system (20) includes a central control unit (CCU), and a plurality of local units (LU) connected to the central control unit (CCU). Each local unit (LU) includes a plurality of input trips (An), such as smoke detector, an earthquake detector, and gas detector, and a plurality of programmable responses, such as a bypass relay (C), a message delivered by a record / playback unit (D), an emergency light (E), and a strobe light (F). The input trips (An) also include a disconnect trip (A1), which is activated by a detector input signal (DI) sent from the central control unit (CCU), and indicates that the central control unit (CCU) has malfunctioned. The programmable responses include a warning output signal (WO) which is sent from the local unit (LU) to the central control unit (CCU) to indicate the presence of a local emergency at the local unit (LU).

The invention provides a high resolution infrared gas sensor which comprises a shell, a metallurgical powder net, a shell cover, an output pin, an infrared gas detector and an infrared light source, wherein the shell is internally and sequentially provided with an optical cavity, a signal control and collection circuit board and a main circuit board, the optical cavity is internally provided with an optical channel and is provided with a vent hole, the probe end of the infrared gas detector is arranged at one end in the optical channel, and the light emitting end of the infrared light source is arranged at the other end in the optical channel; a pin of the infrared gas detector and a pin of the infrared light source are respectively connected with a signal control and collection circuit, the signal control and collection circuit is connected with a main control circuit, and one end of the output pin is connected with the main control circuit; the optical channel is in an Archimedes spiral shape, and the inner wall of the optical channel is coated by gold. The sensor adopts the Archimedes spiral shape optical channel in a limited space to enable an optical path to be dramatically enhanced, thereby enhancing the test sensitivity and the test accuracy of the sensor.

Disclosed are a heat insulation micro-bridge structure and the process method thereof, which belong to the technical field of a micro-electro-mechanical system. The heat insulation micro-bridge structure comprises a micro-bridge body 10, a substrate 13 and cantilever beams 11, 12, wherein the micro-bridge is suspended above the substrate 13 via the cantilever beams and forms a gap 14. As a folded structure is manufactured on the cantilever beams, the active heat insulated length of the cantilever beams is increased in the condition without influence on fill factors of the micro-bridge, thereby increasing the heat insulation effect of the micro-bridge structure. The micro-processing method of the micro-bridge includes depositing sacrificial layer materials on the surface of the substrate, producing a groove structure in the sacrificial layer, depositing and growing the sacrificial layer and forming the folded structure on the place around the groove structure on the sacrificial layer, further removing the sacrificial layer materials, thereby the micro-bridge structure which comprises the cantilever beams with the folded structure can be obtained. The micro-bridge structure can be widely used for the micro electro-mechanical system and devices such as non-refrigerated infrared detectors, gas detectors, micro-heating platforms, infrared origin devices and the like.

The invention discloses a three-component fire gas detector which can accurately detect the concentrations of three gas components of CO, CO2 and CH4 in a fire combustion product, and proposes a fire identification method. The three-component fire gas detector is composed of a gas absorption cell, a signal processing control module and a communication module. In the invention, gas in a protected space is extracted to the gas absorption cell; when an infrared beam in the gas absorption cell passes through a specific gas, infrared light with a specific frequency is absorbed by the specific gas; and the infrared light with specific wavelength in the infrared beam changes, which indicates that the specific gas to be detected exists in the gas, and the gas detector responds immediately to convert the variable quantity and the infrared frequency of the infrared light into an electrical signal, and finally the electrical signal is subjected to signal processing to obtain gas concentrations and types in the detector. The gas detector displays the gas concentration on an upper computer through the communication module.

The invention provides a fire extinguishing device. The fire extinguishing device comprises a fire extinguishing agent storage tank, a fire extinguishing agent spray head, a smoke detecting alarm, a gas detector, a data processor and a controller. According to the fire extinguishing device provided by the invention, a real-time smoke concentration, gas compositions and concentration data in a battery box are obtained by the smoke detecting alarm and the gas detector; fires are classified into levels trough the data processor according to each piece of received data; and for different fire levels and the location of a battery module where a fire occurs, after the fire extinguishing agent spray head is positioned above the battery module where the fire occurs, the flow regulator is controlled by the controller to adjust a release flow and a release time of the fire extinguishing agent to determine an optimum fire extinguishing agent release flow and an optimum configuration amount. According to the fire extinguishing device, rapid fire extinguishing is realized to greatly improve the fire extinguishing efficiency, and the use of the fire extinguishing agent is saved to the greatest extent to decrease the influences, on battery energy storage systems, of the fires.

The present invention describes a portable personal alarm device comprising: —a manually activable switch means; —a smoke and / or gas detector means; —a vibration and / or tilt detection means; —an audible and / or visible alarm indication means; —a power source; and—a control circuit where input from said switch means, said smoke and / or gas detector means are compared to predetermined relevant values and / or ranges and where said control circuit in response to input from said switch means, said smoke and / or gas detector means may activate said audible and / or visible alarm indication means by activating the corresponding means in the proper mode.

A photo acoustic trace gas detector (100) is provided for detecting a concentration of a trace gas in a gas mixture. The photo acoustic trace gas detector (100) comprises a light source (101), an optical cavity (104a, 104b), ratio modulating means (105, 111) and a transducer (109). The optical cavity (104a, 104b) contains the gas mixture and amplifies light intensity. Maximum amplification is provided when a ratio of a wavelength of the light beam and a length of the optical cavity (104a, 104b) has a resonance value. Ratio modulating means (105, 111) modulate the ratio for transformation of the light beam into a series of light pulses for generating the sound waves, an amplitude of the sound waves being a measure of the concentration of the trace gas. A transducer (109) converts the sound waves into electrical signals.

A grain depot intellectualization integrated control system comprises an upper computer. The upper computer is connected with output ends of a plurality of repeaters sequentially through a terminal receiver and a router, the repeaters are connected with a warehouse-outside air temperature-humidity sensor, a ventilating device, an LED screen and a plurality of optical fiber temperature-humidity sensor systems, and the input end of each optical fiber temperature-humidity sensor system is connected with a warehouse-inside air temperature-humidity sensor, a gas detector and a plurality of optical fiber temperature sensors. When the grain depot intellectualization integrated control system is used, the optical fiber temperature-humidity sensor systems send the grain temperature, air temperature and humidity and gas information measured by the optical fiber temperature-humidity sensor systems to superior equipment according to communication requirements, and the upper computer carries out monitoring according to downstream data received by the upper computer and gives an alarm when an abnormal condition occurs. According to the grain depot intellectualization integrated control system, not only is distribution of temperature measuring points wide and is positioning performance strong, but also the situation that electronic parts and components are resistant to phosphine corrosion when used for detecting the temperature of grains can be eliminated, a wireless communication structure is adopted so that grain conditions can be monitored remotely, both monitoring effects and safety are strong, and the application range is wide.

The present invention relates to a simple and reliable portable flashlight shaped instrument that combines in a first embodiment an array of a combination of ultraviolet, white and multicolor LED arrays in combination with a broad band hydrocarbon gas detector and, in a second embodiment, a combination of ultraviolet, white and infrared LED arrays. There is also a readily attachable collector cone with a plurality of magnifying lenses, which are removable and a kit assembly with an extender sleeve for the collector cone, and a collector cone heater chamber. Many types of hydrocarbons fluoresce under the influence of an ultraviolet light. This rugged constructed instrument will find trace amounts of suspect materials and is extremely easy to use. The built in gas detector is cable of detecting trace amounts of accelerants days after a fire.

The invention provides a combined device for small-angle and wide-angle X-ray scattering and an experiment test method of the combined device. The device adopts a microfocus X-ray source used for providing parallel, high-brightness and high-quality X-rays. Three four-knife-edge-slit collimating light paths are arranged to precisely define the light spot pattern and filter off stray lights. A one-dimensional linear detector and a two-dimensional multi-wire gas detector are combined to respectively detect wide-angle and small-angle X-ray scattered signals so as to obtain a material structure from 0.1 nanometers to 100 nanometers. Different lengths of vacuum pipes and different sizes of direct light barriers are arranged in the device, so that the device can adjust the distance between a sample and the detector and can ensure high luminous flux and spatial resolution of the scattered signals under the premise of meeting the requirement on angle testing. The device provided by the invention has the advantages of large test range, easiness in adjustment and so on, and is very suitable for in-situ detection, so that the device is a good tool for studying high polymer materials, inorganic nano-materials, biomedical materials, other soft materials and so on.

An on-site calibrator of gas detector consists of a gas bottle for storing high pressure gas, a pressure stabilizing valve connected with gas bottle through gas tube, a covered container, a high-speed quantitative solenoid valve for sending said gas to covered container, a microprocessor connected to high-speed quantitative solenoid valve and a power supply module for supplying power on said processor and said solenoid valve.

The invention discloses a fire intelligent monitoring and control system, comprising: monitoring equipment, main control equipment, execution equipment and a host computer, the monitoring equipment communicates with the main control equipment, and the main control equipment communicates with the execution equipment and the upper computer respectively; the monitoring equipment includes: : A combination of one or more of smoke detectors, flame detectors, temperature detectors, camera devices and gas detectors; the main control device includes: main control unit, first voice communication module, fire extinguishing device drive module and a circuit breaker drive module; the execution equipment includes a fire extinguisher and a circuit breaker, the circuit breaker communicates wirelessly with the circuit breaker drive module, and the fire extinguisher communicates wirelessly with the drive module of the fire extinguisher; the upper computer includes a host computer, a display, a keyboard, a mouse and an alarm module. It solves the problem of psychological panic caused by the usual alarm sound of the current fire monitoring system, and at the same time, it can timely and effectively control the fire in the monitoring area to avoid or reduce the losses caused by the fire.

The invention provides an AQS (Air Quality System) implementing system applied to automobile afterloading modification, comprising a harmful gas detector and an internal and external circulating throttle controller of an air-conditioning and ventilation system, wherein the harmful gas detector and the internal and external circulating throttle controller are sequentially connected, the harmful gas detector is arranged at an air-conditioning air outlet inside an automobile in a built-out way and comprises a gas sensor which is used for detecting the air quality inside the automobile; the internal and external circulating throttle controller of the air-conditioning and ventilation system comprises a throttle switch which is connected with an internal and external circulating manual switch of an original air-conditioning control panel system, and the internal and external circulating manual switch is controlled according to the detection result of the gas sensor so as to regulate the on-off of an air-conditioning throttle. The AQS implementing system applied to the automobile afterloading modification just needs to be arranged at the automobile air-conditioning air outlet in a built-out or built-in way, the throttle switch is connected with the internal and external circulating manual switch, and the internal and external circulation of an automobile air conditioner can be automatically switched according to the harmful gas content.

The invention discloses an intelligent fire fighting monitoring system for a dangerous chemical production field. The intelligent fire fighting monitoring system for the dangerous chemical production field comprises a control room and a smoke and fire alarm, a gas detector, a network monitoring camera and an intelligent fire monitor which are arranged in the dangerous chemical production field. The control room is internally provided with a plurality of controllers. The smoke and fire alarm, the gas detector, the network monitoring camera and the intelligent fire monitor are respectively connected with the controllers in the control room through CAN (Controller Area Network) buses. Aiming at the characteristics of field condition of the dangerous chemical production field, the intelligent fire fighting monitoring system for the dangerous chemical production field provided by the invention combines fire alarm, field gas environmental analysis and automatic fire extinguishment through combination and application of the smoke and fire alarm, the gas detector and the intelligent fire monitor. A remote conference room is arranged to support fire monitor and safe rescue.

The invention relates to a gas probe (10) for installation in a measurement gas chamber, having a metal housing (30) in which a planar sensor element (21) is disposed, electrically insulated, with at least one contact face (22) that is conductively connected to a metal conductor element (23). For the conductor element (23), an electrically insulating contact holder (24) is provided, which presses the conductor element (23) onto the contact face (22) by means of a spring element (25) that engages the contact holder (24). The conductor element (23) is disposed in an indentation (26) of the contact holder (24), which indentation is oriented toward the contact face (22) of the sensor element (21), and by way of a region protruding out of the indentation (26) of the contact holder (24), the conductor element is in contact with the contact face (22).

The invention discloses a compensation method for a gas detector with a compensation function. The method includes the following steps of: firstly, establishing a compensation algorithm model of gas sensor readings; and then, internally installing a gas sensor compensation program applying the compensation algorithm model in a memory of the gas detector to compensate for the output readings of thegas detector in actual work. The gas sensor output is not only related to the tested gas concentration, but also to the ambient temperature, ambient humidity and cumulative usage time of the sensor,wherein the ambient temperature, the ambient humidity and the cumulative usage time are interference physical quantities. The gas detector with the compensation function designed by the invention is provided with a gas sensor, is also provided with a temperature detector and a humidity detector, records the cumulative working time of the gas sensor, adopts a built-in compensation correction algorithm, calculates the influence of the ambient temperature, the ambient humidity and the cumulative usage time on the gas sensor readings in the actual work, eliminates the interference physical quantities, and accurately reflects the concentration of a target gas.

The invention discloses an autonomous navigation harmful gas detecting robot which comprises a wheel and crawler type robot platform. The wheel and crawler type robot platform comprises a chassis cabin and crawler walking mechanisms arranged on the left side and the right side of the chassis cabin. Gas detectors are arranged on a top plate of the chassis cabin. Each gas detector is connected with an alarm and connected with a robot controller. Laser radar is arranged at the front end of the top plate of the chassis cabin and connected with the robot controller through a navigation processor. A monitor is arranged on the top plate of the chassis cabin and installed on the top plate of the chassis cabin through a telescopic mast. The autonomous navigation harmful gas detecting robot is powerful in function, high in practicability, high in obstacle crossing capacity, high in adaptability to high-temperature and low-temperature environments and toxic and harmful strong acid and alkaline environments, capable of detecting gas leakage, capable of directly finding leakage failure points and quite high in practical value.

The invention discloses an infrared multiparameter fire and gas detector which comprises a shell and an optical window assembly, a detector element array, a fire alarm indicator light and a main control circuit board installed inside a cavity of the shell, wherein the detector element array is a composite fire detector; the optical window assembly comprises an optical lens and a fastening and locating assembly thereof, and the fastening and locating assembly is used for fastening and locating the optical lens in an elastic soft touch manner; and the detector element array at least comprises three pyroelectric detectors with center wavelengths of 3.8 mum, 4.3 mum and 5.0 mum respectively. A plurality of pyroelectric detectors with different bands are used for detecting flames and environment background signals, a signal collected by an intelligent infrared CO / CO2 gas detector is combined, a temperature signal detected by lead sulfide can also be used as an aid, the fusion of information from multiple sensors is realized, and the purposes of alarming in advance and reducing false alarms are better reached. The fire and gas detector provided by the invention has compact structure, small size, high reliability and high sensitivity to early fire detection and is not influenced by sunlight and visible light, and the total design conforms to the explosion proof requirements in national standards.

The invention discloses a terminal resistor automatic match circuit in a gas detector, which is characterized by comprising 12 resistors and 12 single-pole single-throw switches, wherein each resistor is connected with a corresponding single-pole single-throw switch in parallel; the 1-6 resistors are connected in series; the 7-12 resistors are connected in series; and the 1-6 resistors are connected with the 7-12 resistors in parallel. In the circuit, two digitally adjustable resistors are added at the two ends of a CAN bus, play quite important roles in matching of bus impedance, greatly improve the anti-interference performance and reliability of data communication, simultaneously reduce energy consumption and lengthen the service time of power.

The invention provides a gas sensor based on TMDCs-SFOI heterojunction and a preparation method thereof. The gas sensor takes two-dimensional transition metal sulfide TMDCs as a gas sensitive layer and a semiconductor film on an insulator SFOI as a conductive channel; after TMDCs are contacted with SFOI, due to the Fermi level difference, electrons are transferred from the high Fermi level side tothe low Fermi level side, thereby generating space charge regions on both sides of the heterojunction and forming a p-n junction; when gas molecules to be detected are adsorbed on the surface of theTMDCs and charge transfer occurs between the gas molecules to be detected and the TMDCs, the concentration of carriers in the TMDCs is changed, a p-n junction potential barrier is changed, the width of the space charge region in the SFOI is changed, and finally the resistance of the conductive channel is changed, so that the gas to be detected is sensed. According to the gas sensor based on TMDCs-SFOI heterojunction and the preparation method thereof, the gas sensitive layer is separated from the conductive channel, meanwhile, the high sensitivity of the two-dimensional TMDCs to adsorbed gas molecules is utilized, and a gas detector is beneficial to achieving high sensitivity and high reliability and can be directly integrated on a semiconductor chip together with the mature traditional semiconductor device process.

The invention relates to the technical field of fire-fighting and fire-extinguishing, in particular to a fire-fighting fire-extinguishing detection and anti-explosion robot. The robot comprises a robot terminal and a remote-control operation box, wherein the robot terminal comprises an anti-explosion chassis; a fire-fighting monitor, a water curtain spray head, a lifting platform, an anti-explosion headlamp, an alarm lamp, an anti-explosion infrared thermal imager, an anti-explosion sound pick-up, an anti-explosion loudspeaker, a first data transmission antenna, a first image transmission antenna, and an anti-explosion laser obstacle avoiding sensor are arranged above the anti-explosion chassis; the remote-control operation box comprises a back negative box and a hand-operated box; the robot is arranged on a crawler-type chassis, a carried fire water monitor, a poisonous and harmful gas detector, a temperature and humidity transmitter, a camera, a sound pick-up, and the like to replacefire-fighting and rescue staff to enter hazard disaster accident sites such as an inflammable site, an explosive site, a poisonous site, an oxygen-poor site and a dense-smoke site to perform detection, rescue and fire extinguishment, so that problems such as personal safety and insufficient data information acquisition confronted in the sites of a firefighter are effectively solved.

The invention relates to the technical field of fire-fighting equipment, in particular to a fire extinguishing system of a perfluoro battery compartment. The fire extinguishing system comprises a fireextinguishing agent storing container, a bottle head valve I, a starting valve, a siphon, a fire extinguishing agent conveying pipeline, an agentia one-way valve, a pressure signaling device, a pipeline connecting component, a pneumatic pipeline, a gas one-way valve, a bottle head valve II, an electromagnet, a driving gas cylinder, a gas decompression machine, a pressure gage, a safe decompression device, a low-pressure sensor, an electrical circuit, a fire extinguishing system control device, a gas detector, a heat detector, a smoke detector, a UPS emergency power source, a mechanical emergency switch, an atomizer, and a box body. A fire extinguishing medium is perfluoro which is non-poisonous, colourless and with high insulation. The detectors (the gas detector, the heat detector, and the smoke detector) with high accuracy and multiple types are adopted, battery fires can be accurately and quickly detected. Automatic, manual and mechanical emergency stating modes are achieved, and therefore reliability, timeliness and accuracy of fire extinguishing system operation are guaranteed.

The invention discloses a motor vehicle exhaust detection device which comprises a light source, a gas detector, a retro-reflection device and a portal frame, wherein the portal frame comprises two supporting rods erected on two sides of the road and a transverse rod which is connected with the two supporting rods and is positioned above the road; the light source and the gas detector are arranged on the transverse rod of the portal frame; a reflection device is arranged on the surface of the road below the portal frame; and monitoring beams emitted by the light source are reflected into the detector by virtue of the reflection device on the road surface. According to the device disclosed by the invention, the problem that the traditional motor vehicle exhaust remote sensing instrument cannot deal with multilane exhaust monitoring is solved.

A gas detector with a compensated electrochemical sensor exhibits altered sensitivity in response to decreasing stochastic noise in an output thereof. A gain parameter can be adjusted to alter sensitivity. A life-time estimate can be made based on sensitivity.

The invention belongs to the technical field of thermopile infrared gas detectors, and particularly relates to a thermopile infrared gas detector taking a composite film as an infrared absorption layer, and a processing method of the detector. The detector and the processing method solve the problems that the traditional thermopile infrared detector is low in thermoelectricity conversion rate and a suspension structure is damaged easily during a release course. The detector comprises an SOI (silicon on insulator) substrate, thermocouple strips, an SiO2 dielectric layer, metal connection and welding discs, SiO2 isolation layers and an absorption layer, wherein cold ends of the N / P polycrystalline silicon thermocouple strips are supported with the SOI substrate, and the absorption layer is arranged at the top of the detector in a suspension manner. According to the detector and the processing method, a higher absorption rate of the composite nano film to a near-infrared band is utilized, and the absorption layer is suspended above the detector, so that a unit duty ratio of the detector is increased, response and detection rates of the detector are increased correspondingly, and a performance index of the detector is optimized.

A gas detector includes environmental condition detection circuitry that includes one or more sensors, data processing circuitry, and wireless communication circuitry. The gas detector is configured to be carried by a user. The environmental condition detection circuitry detects the presence or lack of presence of a particular gas in a vicinity of the gas detector and further detects a temperature in the vicinity of the gas detector and communicates detection data to the data processing circuitry. In response to detection of a hazardous temperature condition, the data processing circuitry of the gas detector provides an alert notification to the user carrying the gas detector. Also disclosed is an alert system including multiple gas detectors in which a first gas detector communicates an alert to a second gas detector via wireless communication, and in response, the second gas detector transmits the alert to another gas detector or device via wireless communication.