56results about How to "Detection high" patented technology

The invention relates to a safe battery pack, which includes a safe battery pack shell. A plurality of battery sets in series-parallel connection are installed in the safe battery pack shell. The battery set is formed by series-parallel connection of multiple cylindrical single batteries. A fire detection and extinguishing device is mounted in the battery pack shell, and consists of a fire detection tube and an extinguisher. The fire detection tube is mounted in the gaps formed by the adjacent cylindrical single batteries, and is in connection with the extinguisher. The safe battery pack provided by the invention not only can put out a fire quickly after outbreak of the fire, but also can eliminate hidden fire outbreak dangers before sudden change of temperature and fire outbreak, and has the characteristics of good fire extinguishing effect, high fire extinguishing efficiency, high reliability and high safety performance.

The invention provides a distributed thermal pipeline leakage monitoring system. The system comprises an optical fiber temperature measuring host, an industrial personal computer and optical temperature measuring cables; the optical fiber temperature measuring host comprises N temperature measuring channels; each temperature measuring channel is correspondingly connected with one optical temperature measuring cable; the optical temperature measuring cables are laid along the pipeline in the whole journey by using a thermal pipeline as a carrier; and the temperature measuring channels send pulsed optical signals to the optical temperature measuring cables, scattered light sent back from the insides of the optical temperature measuring cables is acquired in real time, according to the refraction index of the optical temperature measuring cables and the light intensity of the scattered light, the whole-line temperature and temperature change rate value curve of the thermal pipeline is obtained, the average temperatures and the maximum temperature change rates of to-be-monitored parts are determined according to the lengths, away from the optical fiber temperature measuring host, of the optical cables laid at the different to-be-monitored parts, and whether the thermal pipeline is in the leakage state is judged according to the set temperature change rate threshold value.

The invention relates to a close range target updating cycle calculating method based on a secondary radar. The close range target updating cycle calculating method includes the first step of generating a remote area, an ordinarily close range area and an extremely close range area in a division mode, the second step of calculating the updating cycle of a target in real time according to the movement situation under the polar coordinates of the target when the target gets close to a secondary radar station and is located within the ordinarily close range area, the third step of converting target processing from a polar coordinate system to a rectangular coordinate system when the target continues to get close to the secondary radar station and is located within the extremely close range area and carrying out track updating and track smoothing on the target on the basis of the rectangular coordinates, the fourth step of calculating the real-time updating cycle of the target according to the track information generated in the third step, storing the updating cycle and finishing processing. By means of the close range target updating cycle calculating method based on the secondary radar, the real-time updating cycle of the target can be obtained, the detection position of the target in the next scanning process can be accurately predicted, the close range target can be tracked and monitored accurately, and false targets can be filtered out more accurately.

The invention discloses an aerial long-distance target following shot system and method. The system comprises at least three base stations; each base station comprises a base, and an industrial personal computer and a display screen arranged in the base; a wireless communication module, a GPS time service positioning module, a tracking camera, a following shot camera and a holder which are connected with the industrial personal computer are arranged at the top of the base. Target detection is started after the base station is initialized; after the target is tracked successfully, the focal lengths of the two cameras are adjusted at the same time, and the spatial position of the target is broadcasted to the system; all base stations share target information after entering a tracking state,three groups of target imaging information are utilized to determine the specific spatial position of a target, the position of the target at the next moment is predicted, the angle of a holder is adjusted in advance, and the base stations dynamically adjust the focal length of the following shot camera, so that the target always occupies a central area in a following shot picture. The method canquickly detect and stably track a long-distance target in the air, and clearly shoot the flight attitude of the target.

The invention relates to a method for detecting heroin hidden in a human body, in particular to a method for conducting fast and automatic nondestructive testing (NDT) to heroin hidden in a human body, which is characterized by comprising the following steps: 1) preparing testing equipment; 2) adopting a human body model with hidden heroin as a sample to detect scattering maps of a detector at different angles, and establishing a standard database of the human body model with hidden heroin; 3) adopting a human body model as a sample to detect scattering maps of the detector at different angles, and establishing the standard database of the human body model; and 4) adopting detected human body as the sample in the step 1), taking the scattering map of a detected target in the step 2) at the same scattering angle as a coherence function map, analyzing signal features of high frequency band to be determined whether the human body contains heroin if the coherence function analysis has a peak value at the high frequency band, otherwise, the heroin is not existed in the human body. The method can fast, accurately detect whether the heroin is hidden in the human body without destruction.

The invention relates to a three-dimensional parking garage with a fire extinguishing function. The three-dimensional parking garage comprises a shelf, a vehicle carrying plate and a lifting driving device; more than one layer parking space is arranged on the shelf, and the position, corresponding to the upper parking space, beside the shelf if provided with a vehicle moving channel; the lower endof the vehicle moving channel leads to the lower part of the shelf; the lifting driving device is arranged on the vehicle moving channel and is used for controlling the vehicle carrying plate to movebetween the upper parking space and the vehicle moving channel; a fire spraying head is arranged on the upper parking space, and the fire spraying head is connected with a water pipe; the upper parking space is further provided with a smoke sensor and / or a flame sensor, and a smoke induction alarm and / or a flame induction alarm are independent existed; or, the smoke induction alarm and / or theflame induction alarm are electrically connected with a controller, and the lifting driving device is electrically connected with the controller; and when the smoke induction alarm and / or the flame induction alarm gives out an alarm, the lifting driving device operates according to the mode set by the controller to remove the vehicle carrying plate of the upper parking space.

The invention discloses a three-dimensional detection method for use before exploitation of a working surface coal bed. The method comprises the following specific steps of: detecting whether a buried geological structure exists at the position of the working surface coal bed by adopting a radio wave tunnel penetration technology, and determining the specific position and range of the buried geological structure; detecting whether a buried water guide structure exists in the range of a working surface bottom plate or top plate by adopting an amplitude-frequency-electricity penetration technology, and determining the specific position and range of the buried water guide structure; detecting whether a buried water guide structure exists below a tunnel bottom plate by adopting a direct-current depth measurement technology, and evaluating; and completely detecting whether buried water guide structures exist inside the working surface and on the bottom plate, the top plate and the periphery by adopting a transient electromagnetic detection technology. The three-dimensional detection method has the beneficial effects that true space detection is realized, the water inrush hidden trouble situation in the damage influence range of stoping on the working surface coal bed can be checked to the maximum extent, accidents are effectively avoided, and the life and property safety of people are ensured.

The invention provides a distributed thermal pipeline leakage monitoring system. The system includes an optical fiber temperature measurement host, an industrial computer, and a temperature measurement optical cable, wherein: the optical fiber temperature measurement host includes N temperature measurement channels, and each temperature measurement channel is connected to A temperature measurement optical cable, the temperature measurement optical cable is laid along the whole pipeline with the thermal pipeline as the carrier, the temperature measurement channel sends pulsed light signals to the temperature measurement optical cable, and the scattered light sent back from the temperature measurement optical cable is collected in real time, according to the refractive index of the temperature measurement optical cable And the scattered light intensity, get the temperature and temperature change rate numerical curve of the whole line on the thermal pipeline, and determine the average temperature and maximum temperature change rate of the required monitoring position through the length of the optical cable laid on different monitoring positions from the optical fiber temperature measurement host , and determine whether each thermal pipeline is in a leaking state according to the set temperature change rate threshold.

The invention relates to a flame recognition algorithm based on image processing technology, belonging to the technical field of fire detection systems. Combustion of common substances usually produces flames, and the flames produced by fires have obvious image features, so flame recognition is used as a specific method of fire detection. The patent of the invention mainly finds the highest point and the center of gravity of the flame through the extraction algorithm of the inner and outer flames, and records the coordinates of the two points respectively; then makes a line connecting the two points and extracts the RGB value on the line connecting the two points; The RGB value on the line is compared with the standard flame RGB feature library, and a matching value is obtained by comparison, and then whether the image is a flame image is determined by the size of the matching value.

The invention relates to an infrared detection method for the hidden fire source point position of coal spontaneous combustion in coal mines, which is used for short-distance detection and prediction of coal spontaneous combustion in underground coal mines. By arranging measuring points in the coal roadway, measuring the infrared radiation energy field strength of the measuring points, finding out the easily oxidized area of ​​the coal roadway and the abnormal temperature area of ​​the concealed fire source, by analyzing the two-dimensional unsteady state of the loose coal body in the coal roadway. The heat conduction equation of the heat source is reversed and solved to determine the location of the concealed fire source. Infrared detection does not need to touch the measured object, is less affected by underground factors, and has high sensitivity, which can realize early prediction and prediction of coal spontaneous combustion in coal roadway; simple operation, rapid detection, convenient underground application, and low detection cost.

The present invention uses the following steps to survey eyes in given image: reading in image, analysing the image to obtain candidate eye zone listing as unchecked candidate eye zone being selected, confirming an adjacent area for selected candidate eye zone and calculating adjacent area size S to obtain dark field, counting dark field and recording the counting value as N, comparing specific value N / S with preset first threshold and determining abovesaid candidate eye zone to be false eye zone to delete it out from listing if specific value N / S is less than the first threshold, otherwise candidate eye zone being true one to keep it in listing, repeating abovesteps till all candidate eye zone being checked and to output listing for post-processing.

The invention discloses a broadband detecting photoelectric detector and a preparation method thereof. The photoelectric detector has a semi-cylindrical structure and mainly comprises the components of a GaAlAs / GaAs photoelectric cathode 1, an anode 2 for collecting electrons, a glass window 3, a housing 4, a package base 5, an anode 6 and pins 7,8. The GaAlAs / GaAs photoelectric cathode 1 is composed of an n-type GaAs substrate, an Si3N4 antireflection coating, a GaxlAll-x1As buffer layer 1, a Gax2All-x2As buffer layer 2, a p-type GaAs transmission layer, a Cs / O activation layer, wherein the n-type GaAs substrate, the Si3N4 antireflection coating, the GaxlAll-x1As buffer layer 1, the Gax2All-x2As buffer layer 2, the p-type GaAs transmission layer and the Cs / O activation layer are successively arranged from bottom to top. The buffer layers comprise the GaxlAll-x1As buffer layer 1 and the Gax2All-x2As buffer layer 2. A gradient doping mode and an index doping mode are utilized respectively. The two buffer layers are GaAlAs with different Al component. The broadband detecting photoelectric detector is advantageous by realizing photoelectric detection with advantages of broad band, high precision, high sensitivity and high response speed.

The invention discloses a lanthanum manganate / semiconductor metal oxide composite gas-sensing material and a preparation method thereof, which is characterized in that the composite gas-sensing material is composed of semiconductor metal oxide and lanthanum manganate. Compared with pure semiconducting metal oxides, the gas sensing performance of LMO / semiconducting metal oxide composite gas sensing materials has been improved by more than 70%.