9 results about "Pyroelectric detectors" patented technology

The utility model discloses a stop-start control mechanism of an electric dining table, which comprises an annular lane, a light shield and a signal detection processing driving trolley, and the annular lane is used for the signal detection processing driving trolley to walk; straight lines where front wheel shafts and rear wheel shafts of the signal detection processing driving trolleys are located intersect at the circle center of the annular lane. The light shield covers the two sides and the upper portion of the annular lane, and the top of the light shield is provided with a lighting window in the surrounding direction of the annular lane. A first pyroelectric detector is arranged at the top of the signal detection processing driving trolley and is used for detecting a far infrared signal penetrating through the lighting window; the first pyroelectric detector is in signal connection with a signal processor, the signal processor receives and processes a detection signal and transmits processed information to a signal controller on the electric dining table, and the signal controller controls a motor control switch of a rotating table top of the electric dining table so as to control the rotating table top to be stopped and started. According to the stop-start control mechanism of the electric dining table, the number of detection signals and the processing difficulty are reduced, and interference is small.

A cable joint fire early warning system and method are disclosed. In the system, a reflective parabolic focusing gas chamber collects the characteristic gas released by the overheated cable joint and provides an infrared light reflection and convergence optical path. An integrated infrared collimating light source emits collimated infrared light into the reflective parabolic focusing gas chamber. A four-channel pyroelectric detector receives the infrared radiation reflected and converged by the reflective parabolic focusing gas chamber and converts it into a measurement signal and an environmental reference signal characterizing the concentration of the characteristic gas. A pyroelectric detector signal conditioning unit is connected to the four-channel pyroelectric detector to filter and amplify the measurement signal and the environmental reference signal. The cable joint overheating early warning model module is an early warning model based on selective state-space compensation and QBEL reinforcement learning to receive and process the measurement signal, environmental reference signal, temperature value, humidity value, and pressure value collected by the cable joint overheating monitoring device, and output the cable joint fire early warning status.

The invention relates to a pyroelectric anti-interference detection method and a pyroelectric anti-interference detection device for characteristic decomposition products of mixed gas, and belongs to the field of insulating gas detection. Comprising the following steps: feeding sample gas into a chromatographic tower through carrier gas; the first product gas flows into a detection cavity through a buffer tank, the first concentration of the first product gas is obtained through carrier gas flushing, the second concentration of the first product gas is obtained through vacuumizing the detection cavity, and the third concentration of the first product gas is obtained through further carrier gas flushing; similarly, first to third concentrations of the second product gas and the third product gas are obtained; and respectively obtaining the final concentrations based on the first to third concentrations of the product gases. According to the method, different characteristic product gases are output to corresponding buffer tanks at different time intervals through chromatography, then sample gas is conveyed through carrier gas, and detection is performed through corresponding pyroelectric detectors, so that the problem that cross interference exists between the characteristic product gases and infrared absorption bands between the characteristic product gases and background gas when the characteristic product gases are directly detected by using a spectrum method is solved.

The utility model provides a cleaning process monitoring device and deposition equipment, and the device mainly comprises a pipeline which is used for a monitored gas to pass through; the infrared light source emitter is arranged at one end of the pipeline, the infrared light source emitter is used for emitting infrared light, and the wavelength of the infrared light comprises a first wavelength and a second wavelength; the dual-channel pyroelectric detector is arranged at the other end of the pipeline, and the dual-channel pyroelectric detector is configured to generate a first voltage based on the infrared light of the first wavelength penetrating through the pipeline; generating a second voltage based on the infrared light of the second wavelength passing through the pipeline; determining the real-time concentration of the monitored gas according to the first voltage and the second voltage; and the controller is electrically connected with the dual-channel pyroelectric detector, and the controller is configured to generate a cleaning process stopping instruction when the real-time concentration is smaller than the preset concentration. The dry cleaning effect can be effectively monitored.

The present application relates to a kind of flexible one-dimensional nanometer sulfur iodine antimony composite material preparation method and its application, by, with nanometer elemental sulfur powder, nanometer elemental iodine powder, nanometer elemental antimony powder, MCM-41 molecular sieve, nanometer titanium dioxide powder, nanometer silicon dioxide powder as raw material, by ultrasonic chemical method preparation flexible one-dimensional nanometer sulfur iodine antimony gel composite material, simultaneously, the present application utilizes the flexible one-dimensional nanometer sulfur iodine antimony gel composite material prepared pyroelectric sensor.The pyroelectric detector prepared from the material of the present application has excellent performance, fast response time, and can be used in subsequent integrated sensors.The one-dimensional nanocrystals generated have good morphology distribution.

The invention discloses a terahertz metamaterial integrated multi-bandwidth ultra-high-speed terahertz pyroelectric detector and a preparation method thereof. The terahertz metamaterial integrated multi-bandwidth ultra-high-speed terahertz pyroelectric detector structurally comprises a silicon substrate layer with a polished single face, a silicon dioxide heat insulation layer growing on the upper surface of the silicon substrate layer and a metamaterial absorber growing on the upper surface of the silicon dioxide heat insulation layer. A typical heat absorption layer is replaced through a metamaterial integrated design, and the structure of the detector is simplified; a split circular ring metamaterial is integrated, an upper electrode of a split circular ring is adopted, charge conduction between an inner circle and an external structure is achieved through a connecting beam, a traditional heat absorption-heat conduction-pyroelectricity heat transmission path is optimized while charge export is guaranteed, and a heat absorption and pyroelectricity integrated detection component is built; the detection bandwidth and performance are optimized, and the advantages of being high in response speed, high in anti-interference capacity and high in low-frequency absorption rate are achieved.

A sensor device configured to detect an occupancy condition in a space may comprise a thermally-insulated detector (e.g., a pyroelectric detector). The sensor device may comprise a heat-generating device, such as a light-emitting diode, that may be positioned within the enclosure at a location such that when illuminated, light from the light emitting diode illuminates a lens through the detector receives infrared energy. The printed circuit board may have a ground plane having at least a portion located between the detector and the light-emitting diode. The printed circuit board may comprise a slot extending from a front surface into the printed circuit board. The ground plane may comprise a gap surrounding slot. The slot and / or the gap in the ground plane may be located between the detector and the light-emitting diode to reduce the thermal transfer of heat generated by the light-emitting diode to the detector.

The invention relates to the technical field of pulse laser detection, in particular to a power and energy synchronous detection method and system for a pulse laser, and the method comprises the steps: dividing a laser pulse outputted by the pulse laser into a first light beam and a second light beam through an optical beam splitter, and generating light beam data; sampling the first light beam in real time based on a high-speed photoelectric detector to generate time domain waveform data; calculating an instantaneous power value, and generating a power measurement sequence; performing energy integral measurement on the second light beam based on a pyroelectric detector to generate a total energy value of a single laser pulse; performing time synchronization through time-to-digital conversion to generate a time synchronization result; correcting according to the beam splitting ratio to generate a theoretical energy value; difference comparison is carried out, and a measurement error calibration parameter is generated; and performing compensation correction to generate a laser pulse power curve and an accurate energy value. According to the invention, the accuracy and repeatability of pulse laser energy measurement are improved.

The application relates to a mixed gas characteristic product pyroelectric anti-interference detection method and device, and belongs to the field of insulating gas detection. The method comprises the following steps: sending sample gas into a chromatography tower through a carrier gas; making a first product gas flow into a detection cavity through a buffer tank, obtaining a first concentration of the first product gas through carrier gas flushing, obtaining a second concentration of the first product gas by vacuumizing the detection cavity, and obtaining a third concentration of the first product gas through further carrier gas flushing; similarly, obtaining the first to third concentrations of a second product gas and a third product gas; and obtaining the final concentrations of the product gases based on the first to third concentrations of the product gases. The method solves the problem of cross interference between characteristic product gases and between the characteristic product gases and background gas in the infrared absorption band during the detection of the characteristic product gases by directly using a spectrum method by outputting different characteristic product gases to corresponding buffer tanks in different time periods through chromatography, then conveying sample gas through a carrier gas, and detecting the sample gas through corresponding pyroelectric detectors.