239 results about "Counting efficiency" patented technology

A semiconductor radiation detector is provided for improved performance of pixels at the outer region of the crystal tile. The detector includes a semiconductor single crystal substrate with two major planar opposing surfaces separated by a substrate thickness. A cathode electrode covers one of the major surfaces extending around the sides of the substrate a fraction of the substrate thickness and insulated on the side portions by an insulating encapsulant. An exemplary example is given using Cadmium Zinc Telluride semiconductor, gold electrodes, and Humiseal encapsulant, with the side portions of the cathode extending approximately 40-60 percent of the substrate thickness. The example with CZT allows use of monolithic CZT detectors in X-ray and Gamma-ray applications at high bias voltage. The shielding electrode design is demonstrated to significantly improve gamma radiation detection of outer pixels of the array, including energy resolution and photopeak counting efficiency. The detector has performance of detector leakage current density less than 6 nA / mm2 at a bias potential of substantially 1400V, and responsive to gamma radiation such that the energy resolution full width half maximum of more than 90% of the pixels is less than 6%.

The present invention discloses a rail type coin separator, comprising a feeding device and a screening and separating main body; wherein the feeding device comprises a funnel main body, the lower side of the funnel main body is connected with a gradual type guiding opening which enables a coin to slide out in a vertical state, the screening and separating main body comprises a screening channel, the screening channel is connected with the gradual type guiding opening and has a set width for enabling the coin to be limited and maintained in an approximately vertical state to roll downwards in the screening channel; a 1-yuan coin outlet used for screening 1-yuan coins, a half-yuan coin outlet used for screening half-yuan coins, and a tenth-yuan coin outlet arranged at the tail end of the screening channel are arranged at certain intervals successively at the side surface of the screening channel, the 1-yuan coin outlet is provided with 1-yuan coin block therein, and the half-yuan coin outlet is provided with a half-yuan coin block therein. The rail type coin separator of the present invention is simple in structure, low in manufacturing cost, and can improve separating and counting efficiency of coins.

The invention provides a superconductive nanowire single-photon detector capable of distinguishing photon number. The superconductive nanowire single-photon detector consists of N superconductive nanowires which are connected in series and corresponding N bypass resistors, wherein each bypass resistor is arranged between every two adjacent superconductive nanowires; the superconductive nanowires are made from superconductive materials such as niobium nitride or titanium niobium nitride and the like; and the bypass resistors are made from metal films such as gold or titanium and the like. The invention further provides a method for preparing the superconductive nanowire single-photon detector. The prepared superconductive nanowire single-proton detector has high quantum efficiency, high counting efficiency, low dark count and capability of distinguishing photon number, and is not influenced by leakage current.

A micro optical sensor of laser dust particle counter, which is characterized by its components, which comprises the following: there is cylinder mirror, spherical mirror and light trap located orderly in the direction of light beam of laser source components. The spherical mirror is located in the right side of the cylinder mirror and light-sensitive area and that of light-electricity detector are located on both sides around the sphere center of spherical mirror, which satisfies the image relationship of geometry optics; vision diaphragm which is suited for the shape of light sensitive-area is located in front of light-electricity detector; the light-electricity detector employs photoelectric diode of high sensitivity or micro photoelectric multiplier tube sealed with metal; A band pass preposition enlarging circuit is fixed in the shell of scatter body of optics sensor with the same width of pulse frequency of scattering light.

The application provides a people counting method and device. The method comprises: performing target segmentation on a current frame image detection area to extract a moving foreground object; detecting the head and shoulder characteristic frame in the moving foreground object; determining whether the head and shoulder characteristic frame in the moving foreground object meets people counting trigger conditions; and counting people according to the head and shoulder characteristic frame when the head and shoulder characteristic frame meets people counting trigger conditions. The people counting method and device can shorten characteristic detection time, reduce a characteristic false drop rate, improve characteristic detection effects, and thereby increase people counting efficiency and accuracy.

The present invention is a multifunctional air purification and disinfection device performance detection system, including a wind tunnel structure, a data acquisition control system and an aerosol generation and collection system, wherein: the wind tunnel structure includes a wind tunnel, and the wind tunnel The air inlet and outlet of the wind tunnel are all provided with electric airtight valves, and the air outlet of the wind tunnel is connected to an exhaust fan. The present invention can meet the requirements of large-span air volume range and performance detection of air purification and disinfection devices of different sizes and specifications; it can measure the resistance of air purification and disinfection devices, the diameter counting efficiency and weighting efficiency of atmospheric dust and artificial dust, and the microorganisms of atmospheric bacteria and artificial bacteria Elimination efficiency, removal efficiency of gaseous pollutants such as formaldehyde and toluene and other performance indicators. In addition, the present invention can also serve as a performance testing system for "air filter for general ventilation" and "high-efficiency air filter".

The invention provides a people counting method based on elliptical ring template matching. The method comprises the following steps of: (S1) getting a video stream image in a monitoring area as an input image; (S2) performing edge detection on the input image through a Sobel operator to get an edge image; (S3) getting a differential image by processing through a background subtraction method according to the input image, and further performing binarization processing on the differential image to get a moving object area; (S4) combining the edge image with the moving object area, performing and operation, and extracting common parts to get moving object contours; (S5) scanning the moving object contours through a plurality of elliptical ring templates, and performing contact ratio Co calculation to extract pedestrian contours and the mass center of each pedestrian contour; and (S6) tracking and counting the mass centers based on a nearest neighbor matching and tracking method of a Kalman wave filter to get the number of people. The people counting efficiency and the accuracy are improved by matching the plurality of the elliptical ring templates with the moving object contours.

The invention provides an intelligent index establishing, inquiring and maintaining method supporting mass data classification and counting, and belongs to the technical field of big data processing. The method includes the step of establishing a data organization structure of intelligent indexes to make the intelligent indexes support mass data classification and counting, wherein the data organization structure of the intelligent indexes includes index metadata and index data, the index metadata is the basis for establishing the indexes and include classification column clusters and counting column clusters, and the index data is indexes for establishing original data. By means of the method, when data is written in, the intelligent indexes are established in real time in a memory, classification and counting are conducted through the intelligent indexes, and the intelligent indexes can be rapidly deleted. The indexes are automatically established for mass data in real time; when mass data is classified and counted, the I / O and calculating time of a magnetic disk is greatly shortened, and therefore classification and counting efficiency is improved greatly, and the full life cycle of index data is automatically managed.

The invention discloses a system and a method for detecting filter material counting efficiency based on monodispersed aerosol. The system comprises a monodispersed aerosol generator and a mixing box that are respectively set and communicated; the monodispersed aerosol generator is sequentially communicated with a first valve, an aerosol generating flowmeter, a first filter and a first high pressure air source; the mixing box is sequentially communicated with a second valve, a dilution flowmeter, a second filter and a second high pressure air source, and is also communicated with a third valve and a third filter in sequence; the side wall of the mixing box is fixedly connected with a hygrothermograph one end of which extends into the mixing box; the mixing box is respectively communicated with an inlet of a filter material clamp and a fourth valve; an outlet of the filter material clamp is respectively communicated with a fifth valve and a filtering flowmeter; the fourth valve and the fifth valve are respectively communicated with a particle counter; sub-micron liquid monodispersed aerosol passes through the filter material, number concentration of the aerosol is measured before and after passing through the filter material, so that the filtering efficiency of the filter material is obtained. The system of the invention has good stability, high precision and can satisfy the requirements of detecting the efficiency of the filter material.

The invention discloses a single-photon counting system and a counting method. The system comprises a flip-latch, a triggering circuit, a clock generating circuit, a counting unit and a memory, wherein the counting unit comprises two counters, the ping-pong operation is adopted for carrying out the single-photon counting, the dead time is short, and the counting efficiency is high. The system can be realized through an FPGA field programmable gate array, and the hardware realization of the system has better flexibility and performance. In addition, the system can be connected with an external system through an embedded type chip and a USB bus, high-speed data transmission can be realized, and the invention has better real-time performance.

The invention relates to an RFID (radio frequency identification device) reading and writing module, and particularly relates to an ultrahigh-frequency RFID reading and writing module based on a self-adaptive tuning technology of an antenna. The ultrahigh-frequency RFID reading and writing module comprises a central processor, a self-adaptive impedance tuning network, a power management circuit, a connector, a radio frequency connector, a crystal oscillator I and a crystal oscillator II, wherein the crystal oscillator I and the connector are connected with the central processor; the central processor is connected with the self-adaptive impedance tuning network; the self-adaptive impedance tuning network is connected with the radio frequency connector; the power management circuit is connected with the connector, the central processor, the crystal oscillator II and the self-adaptive impedance tuning network; and the radio frequency connector is connected with an external antenna. The ultrahigh-frequency RFID reading and writing module has the beneficial effects of solving the problem that a reflected wave of the antenna is deteriorated because of external factors so as to cause degeneration of receiving sensitivity, having stable radio frequency characteristics when the cost is reduced, and being stronger in multi-label processing capacity, higher in counting efficiency and more suitable for application of a handheld reader-writer.

The invention relates to a device and a method for counting overlapped round particulate matter, which aims to obtain higher counting precision and improve counting efficiency. The device for counting overlapped round particulate matter comprises a CCD camera, a DSP data processing system and an LCD, wherein the CCD camera is used for acquiring particle images and sending image signals into the DSP data processing system; the DSP data processing system comprises a DSP data signal processor, converts analog images acquired by the CCD camera into digital image signals, realizes image processing algorithm of a text, finishes counting particles, and displays counting results; and the LCD is connected with the output of the DSP data processing system, and is used for displaying acquiring original images of the particles and results after segmentation and outputting counted quantity of the particles.

The current invention applies to photon counting silicon x-ray detectors with energy discriminating capabilities and applications in x-ray imaging systems. The overall image quality produced by such a system is improved by the presented novel methods for optimally using the energy information in Compton events and making selective use of counts induced from charges collected in neighboring pixels. The pile-up problem during high-flux imaging regimes is reduced by a novel method for signal reset, which improves the count efficiency by reducing the risk of losing event due to signal pile-up in the read out electronics chain.

The present invention discloses a cable temperature measurement device based on an RFID technology. The cable temperature measurement device based on the RFID technology comprises a passive RFID temperature measurement label arranged on a cable, the passive RFID temperature measurement label is fixedly adhered on the skin exterior of the cable via a bottom adhering layer, is contacted with the skin exterior of the cable tightly, and comprises a substrate, and an RFID chip with an automatic tuning circuit is installed on the upper end face of the substrate. According to the present invention, the passive RFID temperature measurement label can be pasted at any position of the cable, the label is small in size and is not influenced by the diameter of the cable, and the label can be bent along with the cable and can carry out the cable identification and the remote temperature measurement. The label identification has the characteristics of being strong in penetrability and long identification distance, being able to count the large-batch labels simultaneously, the problems that the conventional cable temperature measurement device can not be counted due to the enclosed wirings, the one-by-one counting efficiency and the accuracy are low, etc., are solved, and the cable temperature measurement device based on the RFID technology has the characteristics of being low in maintenance cost and high in accuracy and benefit, being convenient to install, etc.

The invention discloses a grain counting method for a spike of a single rice based on digital image processing technology. The method comprises the steps that S1) the correlation between a characteristics parameter and the grain number of the spike of the rice is established, a first branch of the spike is straightened, a spike image is obtained via a scanner, and the spike image is preprocessed; S2) mathematic morphological processing is carried out on the preprocessed spike image to remove part which is low in structural element, and a hole filling operation is carried out to remove all non-target objects; S3) characteristic parameters of the area and the total first-branch length of the grain part of the spike image are extracted; S4) mathematic models between the characteristic parameters and the grain number are established; and S5) the mathematic model between the characteristic parameters and the grain number are verified. The grain counting method based on digital image processing technology can be used to count grains of the spike accurately, rapidly and objectively, and the grain counting efficiency of the spike is improved.

The invention discloses an optical sensor of a novel high-output all-semiconductor dust particle counter. An aspherical mirror, an entrance lens screen, an exit lens screen and a light trapping are arranged in sequence in the heading direction of the light beam sent out by a semiconductor laser light source, a spherical reflector, a lens screen and a photodetector are arranged in the direction perpendicular to the light path, and the photosensitive area and the photosensitive surface of the photodetector are respectively positioned at the two sides of the center of the spherical reflector and satisfy the object-image relationship in the geometrical optics, wherein the light source is a high-power semiconductor laser light source, the photodetector is a photodiode, and a gain adjustable preamplification circuit is arranged on the shell behind the photodetector. The invention improves the counting efficiency, and raises the counting efficiency and the particle size resolution of the instruments. Besides, the invention has the advantages of long service life of the instruments, good exchangeability of the instruments, low power consumption and low cost; moreover, the optical sensor has small size, which is beneficial to the micromation of the complete device.

The invention provides a measuring device for a Raman scattered spectrum and a Raman scattering spectrometer. A path of laser emitted from a pulse laser excites a sample and a Raman scattered light signal is generated; a Raman scattered light path transmits the Raman scattered light signal to a grating monochromator; the grating monochromator transmits the Raman scattered light signal to a signal light detector; the pulse laser emits another path of laser to a reference light detector, and the reference light detector outputs a timing beginning signal of the Raman scattering event according to the laser; the signal light detector carries out precise counting measurement of photons comprised by each light pulse of the Raman scattered light signal in a preset time period with the timing beginning signal as a start, and the light detector is a silicon photoelectric multiplier; a spectrum generation device generates a Raman scattered spectrum according to the photon number of all the light pulses of the Raman scattered light signal. The time resolution is raised, the photon counting efficiency is raised and the signal to noise ratio and the detection speed are raised.

The invention discloses a generation method and device for character relationship maps. The method comprises following steps: obtaining a search request, wherein the search request comprises target characters; determining a file set comprising at least one file of corresponding associated characters which is used for searching target characters; and utilizing relational closeness of associated characters, relational closeness between target characters and associated characters extracted from the file set to generate character relationship maps of target characters. The scheme for character relationship maps can be automatically generated and does good for increased counting efficiency and improved accuracy of character relationships during the process of generating maps.

The invention discloses a method and a device for automatically counting components by using a machine vision and image processing method. Small-sized components such as chip resistors, chip capacitors and the like can be automatically counted more accurately, the counting efficiency and the counting accuracy are improved, and the labor intensity of operators is reduced.

A position sensitive radiation spectrometer for identifying, quantifying, and locating a radioactive source in a target. The position sensitive radiation spectrometer includes an array of gamma-ray detectors arranged along one or more dimensions of a container to be assayed. A known source placed at various calibration positions is used to establish counting efficiencies at various energy levels. From the counting efficiency and the actual count rate, the activity level of an unknown source relative to the calibration positions is calculated. The relative activity levels correlate to the position of unknown source and provide useful information about the actual distribution of radioactive material.

A fast counting method of wheat basic seedlings based on machine vision and graphics processing is proposed to solve the technical problem of low counting efficiency of wheat basic seedlings, and includes the following steps of acquiring basic seedling images, enhancing image restoration and performing target count. In the target count, the image processed by the step S8 is counted by using the connected area comparison method to obtain the number of wheat basic seedlings, so that the blocking adhesion of the wheat seedlings can be read and recognized, and the number of wheat basic seedlings is equal to the number of wheat seedlings counted in each connected area. By using machine vision and graphics processing method, the counting efficiency is high, and the method is suitable for large-scale statistics of wheat planting or germination.

The invention discloses a thousand-seed weighing instrument based on machine vision, comprising a CCD (Charge Coupled Device) camera, a shadowless light source, a rotary unloading mechanism and a precision electronic scale, wherein the CCD camera is used for acquiring an image of seeds; the shadowless light source is used for supplementing light during image acquisition; the rotary unloading mechanism comprises a tray, an objective table and a bin shell; the tray and the bin shell are connected by screws to form a bin, the bin is used for accommodating crop seeds to be counted, a guide rail is arranged below the tray, a circle of guide rail trough is arranged on the objective table, and the tray can rotate on the objective table via the guide rail; the rotary unloading mechanism is used for scattering seeds and controlling the seeds to fall, and the precision electronic scale is used for weighing seeds. The thousand-seed weighing instrument overcomes the defect of low thousand-seed weight counting efficiency of existing crop seeds, and can fulfill the purpose of automatic measurement of crop thousand-seed weight.

The application provides an automatic counting device of standard work-pieces of an air conditioner, which is applied to a production line of the air conditioner. The automatic counting device of the standard work-pieces of the air conditioner comprises a weighing sensor, an analogue-digital converting circuit, a processor and a display unit, wherein the weighing sensor is used for weighing a total weight of a turnover container in which the standard work-pieces are contained and outputting a weight signal to the analogue-digital converting circuit; the analogue-digital converting circuit converts the weight signal into a weight value and outputs the weight value to the processor; the processor calculates based on the weight value, the weight of the overturn container and the unit weight of each standard work-piece to obtain a number of the standard work-pieces in the overturn container; the display unit connected with the processor is used for displaying the number of the work-pieces calculated by the processor. Therefore, an operator can know the number of the standard work-pieces through the display unit rather than counting the standard work-pieces via a manual mode, accordingly the work efficiency can be greatly improved, and the problem of relatively low manual counting efficiency can be further solved.

The invention relates to a particle counting device, and discloses a rotating drum-type particle counting machine. The rotating drum-type particle counting machine comprises a counting rotating wheel, a material storage cabin and a collector, wherein the counting rotating wheel is a polygonal rotating wheel; the central shaft of the counting rotating wheel is placed horizontally; a wave-toothed roller is coaxially arranged in the counting rotating wheel; counting material cabins are uniformly distributed on the counting rotating wheel; bumps are uniformly distributed on the wave-toothed roller; the material storage cabin is arranged above the counting rotating wheel; a line guide barrier is arranged between the material storage cabin and the counting rotating wheel; the line guide barrier is adhered to an inlet device; shaking drivers are respectively arranged at the two ends of the line guide barrier; sieve holes are uniformly distributed in the line guide barrier at intervals vertically and horizontally; and the collector is arranged below the counting rotating wheel. The rotating drum-type particle counting machine has the advantages of high particle counting efficiency, simple structure, easiness in operation and high application value.

The invention discloses a method and a device for interference fringe automatic counting used for a Michelson interferometer. The method for interference fringe automatic counting used for the Michelson interferometer comprises initializing an interference fringe count value, enabling a photoelectric sensor to be aimed at an interference fringe, adjusting drum wheels of the Michelson interferometer, collecting analog voltage signals output by the photoelectric sensor at the same time, filtering and eliminating a 50 Hz artificial lighting device light source interference signal, converting the artificial lighting device light source interference signal into a digital voltage signal, converting the digital voltage signal into high electrical level or low electrical level, and adding one to the interference fringe count value and outputting the count value when converting from the high electrical level to the low electrical level is detected. The device for interference fringe automatic counting used for the Michelson interferometer comprises a mainframe box with a master control circuit board and a power supply circuit board, wherein a power switch, a power socket, a flexible metal tube, a push-button unit, a liquid crystal display and a power indicator light are arranged on the mainframe box, and a front-end amplifying circuit, a 50 Hz light source filter circuit, an analog-digital conversion circuit and a microprocessor are arranged on the master control circuit board. The method and the device for interference fringe automatic counting used for the Michelson interferometer have the advantages of being high in counting accuracy, strong in anti-interference performance, and high in counting efficiency.

The invention discloses a continuous grain counting device of an areca-nut packaging production line. The device comprises a rack, a feeding hopper, a discharging hopper, a plurality of sets of spiral shafts and a grain counting hopper. A material dividing wheel is arranged in the feeding hopper and mounted on the rack through a material dividing wheel shaft, and the upper end of the discharging hopper is connected with the lower end of the feeding hopper; each set of spiral shafts comprise two parallel spiral shafts; each spiral shaft is provided with a gear, and the gears on two adjacent spiral shafts are meshed; a plurality of discharging openings are formed in the bottom of the discharging hopper and correspond to gaps between every two adjacent spiral shafts of the multiple sets of spiral shafts; the discharging ends of the spiral shafts are connected with a feeding opening of the grain counting hopper; a grain counting device and a grain hopper switch are arranged on the grain counting hopper, and a baffle switch is connected with a piston rod of an air cylinder; and the piston rod of the air cylinder is mounted on the rack. According to the device, areca-nut grain counting mechanization is achieved, the grain counting efficiency is high, the labor intensity of grain counting workers can be relieved, and the grain counting process cost can be reduced.

The invention discloses a high-flow dust particle counting sensor with a novel photosensitive area structure. An aspherical mirror, an incident diaphragm, an emergent diaphragm and a light trap are arranged in sequence in the advancing direction of light beams emitted from a high-power semiconductor laser source; a spherical reflector, a field diaphragm and a photoelectric detector are arranged in the direction vertical to a light path; the photosensitive area and the photosensitive surface of the photoelectric detector are respectively positioned at two sides of the sphere center of the spherical reflector and satisfy the geometric object image relationship; a gas circuit system consists of a sampling nozzle and an outlet nozzle; the caliber of the sampling nozzle is smaller than that of the outlet nozzle; and the sampling nozzle and the outlet nozzle are arranged unsymmetrically with respect to the photosensitive area. The high-flow dust particle counting sensor has the advantages of simple structure, small volume, high counting efficiency and high particle diameter resolution ratio and can realize correct and efficient detection on the samples of high-flow dust particles not lower than 50L / min.

The invention provides a pedestrian detection method based on the multi-granularity feature, and belongs to the technical field of video image processing. The method comprises that S1) the multi-granularity feature vector in a training sample set is extracted; S2) the multi-granularity feature vector is trained on the basis of a Gentle Adaboost cascade algorithm to obtain a pedestrian cascade classifier; S3) the pedestrian cascade classifier is used to carry out pedestrian detection on input images obtained in a self-monitoring area; and S4) pedestrians detected in the S3) are tracked and counted in the EKM algorithm. According to the invention, the multi-granularity feature vector in the training sample set is extracted, the pedestrian cascade classifier is utilized in an optimized manner to detect the pedestrians in the monitoring area, and the pedestrian counting efficiency and accuracy in the common area are effectively improved.

The embodiment of the invention discloses a user index statistical method and a server, wherein the method comprises the steps that: a server generates at least one user access bitmap table corresponding to at least one user, wherein the Nth user access bitmap table in the at least one user access bitmap table includes information of the access behaviour of the Nth user within each time unit in the pre-set time period; the access behaviour is that the Nth user accesses a target application or the Nth user does not access the target application; the at least one user is a user accessing the target application historically; the Nth user is one in the at least one user; the server counts user indexes corresponding to the target application according to the at least one user access bitmap table; and the user indexes include at least one of the number of weekly loss users, the number of weekly return users, the number of daily active users, the number of weekly active users and the number of monthly active users. By means of the user index statistical method and the server disclosed by the invention, the counting efficiency of the server can be increased.