82results about How to "Reduced Sensitivity Requirements" patented technology

The invention discloses a packaging structure and a packaging method for a fingerprint recognition chip. The packaging structure comprises a substrate, a sensing chip, a plurality of wires and a plastic package layer. The substrate is provided with a first surface, and the first surface of the substrate is provided with a first welding pad layer. The sensing chip is located on the first surface of the substrate and provided with a first surface and a second surface, the second surface of the sensing chip is located on the first surface of the substrate, the first surface of the sensing chip is provided with a sensing area and a peripheral area, and the surface of the portion, in the peripheral area, of the sensing chip is provided with a second welding pad layer. The two ends of the wires are electrically connected with the first welding pad layer and the second welding pad layer respectively, the wires have top points with the maximum distance to the surface of the substrate, and a first distance is reserved between the top points and the first surface of the sensing chip. The plastic package layer is located on the surface of the substrate and the surface of the sensing chip and surrounds the wires and the sensing chip, and a second distance is reserved between the surface of the plastic package layer and the first surface of the sensing chip and is larger than the first distance. According to the packaging structure, the requirement for the sensitivity of the sensing chip is lowered, and application is wider.

Disclosed are a fingerprint identification chip packaging method and a fingerprint identification chip packaging structure. The fingerprint identification chip packaging method includes: providing a substrate; coupling a sensing chip on the surface of the substrate, wherein the sensing chip is provided with a first surface comprising a sensing area and a second surface opposite to the first surface and positioned on the surface of the substrate; forming a plastic packaging layer on the surface of the substrate, wherein the plastic packaging layer encloses the sensing chip, and the surface of the plastic packaging layer is flush to the first surface of the sensing chip; forming a covering layer with the thickness smaller than 100 micrometers on the plastic packaging layer and the first surface of the sensing chip. The fingerprint identification chip packaging method has the advantages that the fingerprint identification chip packaging structure formed by the fingerprint identification chip packaging method is simplified, and the requirement on sensitivity of the sensing chip can be lowered, so that the fingerprint identification chip packaging method and the fingerprint identification chip packaging structure are wider in application range.

The invention relates to an enhanced oxygen fluorescence sensitive film and a preparation method thereof. According to the preparation method, a sol-gel or polymer matrix is used for effectively embedding a fluorescent probe metal complex and a fluorescence enhancing substance nano titanium dioxide particle so as to prepare a nano material doped photochemical sensor film with enhanced response to oxygen. An oxygen sensitive film prepared according to the preparation method has advantages of uniform surface, good mechanical strength, good fluorescence intensity and easiness in manufacturing process and can be detected by a photoelectric detection device with low sensitivity, and the sensor cost is reduced effectively; therefore the enhanced oxygen fluorescence sensitive film is easy to miniaturize and generalize.

The invention discloses a five-port nonblocking optical router based on micro-ring resonators. The five-port nonblocking optical router comprises a first micro-ring resonator, a second micro-ring resonator, a third micro-ring resonator, a fourth micro-ring resonator, a fifth micro-ring resonator, a sixth micro-ring resonator, a seventh micro-ring resonator, an eighth micro-ring resonator, a ninth micro-ring resonator, a tenth micro-ring resonator, an eleventh micro-ring resonator, a twelfth micro-ring resonator, a thirteenth micro-ring resonator, a fourteenth micro-ring resonator, a fifteenth micro-ring resonator, a first optical waveguide, a second optical waveguide, a third optical waveguide, a fourth optical waveguide and a fifth optical waveguide, wherein one end of the first optical waveguide is a first input end and the other end of the first optical waveguide is a fifth output end; one end of the second optical waveguide is a second input end and the other end of the second optical waveguide is a first output end; one end of the third optical waveguide is a third input end and the other end of the third optical waveguide is a second output end; one end of the fourth optical waveguide is a fourth input end and the other end of the fourth optical waveguide is a third output end; and one end of the fifth optical waveguide is a fifth input end and the other end of the fifth optical waveguide is a fourth output end. By using the five-port nonblocking optical router based on the micro-ring resonators, eastern, southern, western, northern and local nonblocking free communication is realized, the average losses and crosstalk of links are reduced and an optical network-on-chip is enabled to have better extensibility.

The invention relates to a wafer defect detection system and method. The system comprises a processing unit, a control assembly, a displacement assembly, a detection assembly, and a signal acquisitionunit, the displacement assembly and the detection assembly are cooperatively arranged, and the displacement assembly controls the detection signal acquisition and movement of the detection assembly through displacement. The control assembly controls movement of the displacement assembly through an instruction and indirectly controls detection signal acquisition of the detection assembly, a signalacquired by the detection assembly and instruction information of the control assembly are transmitted to the signal acquisition unit, and the signal acquisition unit transmits the acquired signal tothe processing unit for processing to obtain defect information; the sensitivity requirement of an area array detector is reduced, and the detector cost can be effectively reduced; compared with a traditional scanning mode, the detection speed of the whole system can be greatly increased; and as the area array detector does not move in the area area exposure process, the problem of dithering andblurring of a traditional scanning mode can be solved, and the defect detection and recognition rate is increased.

The invention discloses an improved SVM equalization method and system for an NG-PON. The method in the invention comprises the steps of: (1), inserting training sequences into digital signals needingto be transmitted every the set length, generating electrical NRZ signals through high-rate NRZ modulation, and converting the high-rate electrical NRZ signals including the training sequences into optical NRZ signals; (2), transmitting the optical NRZ signals to a receiving end, and converting the received optical NRZ signals into the electrical NRZ signals; (3), performing up-sampling on the electrical NRZ signals, and performing down-sampling after time synchronization; (4), extracting the training sequences, constructing a characteristic value vector for each training sequence, and calculating an optimal hyperplane; (5), judging information sequences by utilizing the optimal hyperplane, so that equalization is realized; and (6), returning to the step (4) after equalization of the information sequences is completed every the set length. According to the improved SVM equalization method and system for the NG-PON disclosed by the invention, the problem that the receiving sensitivityof the system is decreased due to signal distortion, intersymbol interference and the like introduced by bandwidth limitation when high-rate signals are transmitted by a low-bandwidth device can be solved.

The invention relates to a touch control type anti-theft device which comprises a fingerprint anti-theft system, an operation interface, a terminal processor, a connection interface and a pressure sensing system. By using a fingerprinting device and a touch control pressure and contact time device to identify information, the touch control type anti-theft device achieves the anti-theft purpose, thereby not only solving the problem of the high dependence caused by the only use of fingerprinting sensitivity but also achieving the purpose of reducing cost because the requirement for the fingerprint sensitivity is lowered, and the requirements for the instrument and device sensitivity are consequently lowered.

The present invention provides a method to confirm interference signal power of an interference source Sj (j is not less than 1 but not more than n and n is a natural number) received by a wireless base station equipment, which includes procedures below: Interference signal emission power Tint (j) of the interference source Sj and useable signal emission power Tsig (j) are measured and saved. Useable signals of the interference source Sj are received and power Rsig (j) of the useable signal, the saved interference signal emission power Tint (j), the saved useable signal emission power Tsig (j) and the useable signal receiving signal Rsig (j) are measured on the base station equipment. In addition, it is necessary to calculate interference signal receiving power Rint (j) of the interference source Sj. The present invention also provides a CDMA base station equipment to confirm back noise value with the method above and a method to update the back noise. Besides, the present invention ensures more accurate and effective control over threshold of CDMA base station equipments based on back noise uplift.

The invention discloses a combined type interconnected air suspension in a vehicle air suspension system and an interconnection mode control method thereof. On the basis of a traditional interconnected air suspension, transverse interconnected pipelines, longitudinal interconnected pipelines and diagonal interconnected pipelines are added, interconnection states are achieved through air springs without absorbers, an electromagnetic valve is added into each interconnected pipeline, and five modes of non-interconnection, transverse interconnection, longitudinal interconnection, four-corner interconnection and diagonal interconnection are achieved. On the one hand, contradiction of control stability and ride comfort of a vehicle is further relieved through the four interconnection modes of non-interconnection, transverse interconnection, longitudinal interconnection and four-corner interconnection and the capacity for adjusting the roll stiffness and the pitching stiffness of the air suspension, and on the other hand, by means of the diagonal interconnection mode, the ride comfort can be improved to a certain extent and certain control stability is ensured when the vehicle runs at a high speed, so that the sensitivity requirement of a control system is lowered, and the ride safety is ensured.

The invention discloses a photoelectric smoke detector based on forward scattering in a small angle. The detector comprises a detection chamber provided with a light source, an incident lens, a receiving lens system and a detector which have the same optical axis in sequence; a baffle board is arranged between the receiving lens system and the detector; the incident lens focuses the incident light of the light source on particles in the center of the detection chamber; and the receiving lens system transmits the forward scattering light in a small angle of the particles in the center of the detection chamber to the detector. The photoelectric smoke detector lowers the requirements on the sensitivity of the detector, increases the response speed for smoke particles, decreases the false alarm rate of the detector and reduces the error of obtaining the scattering intensity distribution.

An analysing device and method is featured as setting gas chamber, filter, measuring electrolytic pool and gas pump in sequence on piping connected to sample reactor to form a closed loop, setting another connecting pipe being controlled by control unit to open gas valve and pump for making gas circulate in each pipe and gas chamber; drawing off gas of fixed valume from closed loop and carrying on ratio conversion for finalizing sulphur content detection in sample.

The invention provides a monitoring structure and a monitoring method for emission leakage of hydrocarbons of an internal combustion engine, which can monitor the emission leakage of the hydrocarbonsof an evaporation system of the internal combustion engine and / or the ventilation system of a crankshaft box of the internal combustion engine. According to the monitoring structure for emission leakage of hydrocarbons of the internal combustion engine, the pollutant gas of the crankshaft box firstly passes by a high pressure flushing pipeline, then flows by a high load pipeline of the evaporationsystem and finally enters an air inlet pipeline in front of a compressor by a Venturi tube. Compared with the prior art, due to the action of the Venturi tube, the faults of the high load desorptionof the evaporation system and the disconnection of the high load pipeline of the ventilation system of the crankshaft box can be monitored simultaneously by newly adding a pressure sensor, the pollutant gas of the crankshaft box will obtain greater degree of vacuum, the change amplitude of the pressure in the pipeline is improved by the Venturi effect, the purpose of covering most diagnostic working conditions by using the pressure sensor of lower sensitivity is realized, the fault recognition is improved, the requirement on the sensitivity of the pressure sensor is reduced, and the productioncost is reduced.

Electrolytic cell, filter and air chamber are setup on pipe connected to reaction furnace so as to form a closed loop. Opening and closing valve and pump on pipe controlled by controlling unit makes circulation of gas to be measured in pipe and air chamber. Extracting gas in constant volume in closed loop measures and calculates sulfur content. In the equipment, closed loop is formed: from reaction furnace, through external communicating pipe, two air chambers, gas valve, filter, electrolytic cell, pump back to reaction furnace. A bypass pipe is connected to inlet and outlet of second air chamber. Two valves are connected to the said bypass pipe, one is connected to reaction furnace, and another is connected to disposal of waste gases device. The invention raises measuring precision since even gas concentration is in chamber and pipe, requires low sensitivity of sensor.

The invention provides a camera lens jitter compensation system which comprises a sensor, a controller, a driving module, an image module and a parameter adjusting module. A group of jitter compensation parameters is stored in the controller which has the jitter compensation parameters adjusted within a certain deviation range. The controller is used for controlling the driving module to drive a camera lens to move to perform jitter compensation according to the jitter compensation parameters after jittering of the camera lens is sensed by the sensor. The image module acquires images subjected to jitter compensation through the camera lens and analyzes resolution of the acquired images. The parameter adjusting module is used for adjusting the jitter compensation parameters when the resolution of the images is lower than a preset value so as to acquire the images with the resolution higher than the preset value. Since the jitter compensation parameters are judged whether or not to be in need of adjustment through evaluation of the resolution of the images after jitter compensation, requirements on sensitivity of the sensor are lowered.

A voice or vibration sensor for sensing the liquid dropping signal of perfusion has at least two clamps with arc recess matched with the perfusion tube. A sound-picking up hole is made on said arc recess. An extended sound picking-up tube with a sound picking-up or vibration unit at is tail is arranged at the sound-picking up hole for picking up the vibration caused by liquid dropping and converting it to electric signal.

The invention discloses a network monitoring method and device based on polling matching; modulation is carried out in links to be monitored by an adjustable light source, while a monitoring pulse sequence corresponding to the links to be monitored emerges, and states of the links to be monitored are recognized one by one through a command transmitted by a receiving processing and control unit; the network monitoring method enables branch fiber links in a passive optical network to be effectively monitored; the states of the branch fiber links are judged respectively at a receiving end through unique signal characteristics generated by matching of the monitoring pulse sequence and a terminal encoder; in addition, the network monitoring device has simple structure and enables system and user costs to be effectively reduced.

The invention discloses a structured light 3D scanning measurement device and method. The device comprises an optical projector arranged on a projection frame, a reflection mirror, a projection frame, and a measurement target. The optical projector can output projection light. The light out direction of the optical projector just faces the reflection surface of the reflection mirror. The light out direction of the optical projector is fixed. The reflection mirror is arranged on the projection frame and comprises a reflection surface. The projection light of the optical projector is skewed to the reflection surface of the reflection mirror. The reflection surface of the reflection mirror reflects the projection light of the optical projector to the surface of the measurement target. The projection frame is arranged far from the measurement target and is fixedly connected to the optical projector and the reflection mirror. The distance from the projection frame to the measurement target is known. The measurement target receives the projection light reflected by the reflection mirror and carries out diffuse reflection.

This invention provides a touch control device of family appliances including an inducing chip at the PCB of the control device, a touch button connected with the chip, in which, said chip and the button are split structures. This invention also provides a control panel for family appliances including a display device at the PCB, an inducing chip and a touch button connected with the chip, both of which are split structures.

The invention relates to a channel equalization method based on SHAP feature optimization, and the method comprises the steps: (1) enabling a transmitting end to transmit data containing a training sequence to a receiving end through an optical fiber, and enabling the receiving end to input the sampled data containing the training sequence to an equalizer module based on machine learning; (2) extracting a received training sequence by an equalizer module based on machine learning, and constructing a feature vector for the training sequence; (3) obtaining the SHAP value of each feature of each sample through calculation, and measuring the feature weight importance of each feature and the influence on the prediction result based on the index; (4) selecting features based on the feature weights, and constructing feature vectors for the training set and the test set according to a feature selection result; and (5) inputting the constructed feature vector into an equalizer based on a DSP algorithm to equalize subsequent effective data. According to the invention, the system performance is maintained, the influence of clock jitter on the system performance is reduced, and the calculation complexity of channel equalization is reduced.

The invention relates to a powder box for an electrophototgraphic imaging device, which comprises a powder box main body, a driving gear set and a detection gear, wherein the detection gear comprises a projecting part and a gear part; the gear part is only arranged on part of the circumferential upper part of the detection gear; the gear part meshes with one gear in the driving gear set; the electrophototgraphic imaging device is provided with a resetting switch; under the driving action of the driving gear set and the gear part, the projecting part contacts or does not contact the resetting switch on the electrophototgraphic imaging device; the projecting part is arranged on a cylindrical post; and the cylindrical post is provided with a notch. The contact or separation time of the projecting part and resetting switch is prolonged, thereby lowering the requirements for the sensitivity of the resetting switch.

The invention discloses a wearable intraocular pressure detection device and detection method based on a corneal contact lens grating. The wearable intraocular pressure detection device comprises a wearable bracket and a corneal contact lens, wherein the wearable bracket is used for arranging a light source, a photoelectric detector and a processing circuit, and the light source is used for emitting a light beam; the corneal contact lens is used for reflecting the light beam emitted by the light source, and comprises a transparent grating-free area located in a central area and a grating arealocated in a fringe area of the ; the photoelectric detector is used for receiving a diffraction light beam reflected by the corneal contact lens and converts an acquired light signal into an electricsignal and transmitting the electric signal to the processing circuit; and the processing circuit is used for processing and calibrating data transmitted by the photoelectric detector. The wearable intraocular pressure detection device is based on an optical principle and has the characteristics of small size, simple process, high comfort, internal device passiveness and the like, and can be wornfor a long term to realize continuous measurement.

The invention provides a temperature sensor capable of improving thermistor sensitivity. The temperature sensor comprises a snap-action thermostat with hooks, a thermistor, an inner support, a heat conducting cover, an inner cup, an outer cup and a spring. The heat conducting cover is pivoted to an upper opening of the inner cup, a lower opening of the inner cup is downwardly provided with a vertical supporting leg which is vertically and movably clamped at a limiting gap in the bottom of the outer cup, and the spring is arranged between the pivot position of the heat conducting cover and the bottom of the outer cup. The temperature sensor further comprises a heat insulating spacer which is arranged between the inner top surface of the heat conducting cover and the top surface of the snap-action thermostat with the hooks, the snap-action thermostat with the hooks is fixed through the inner support, and the thermistor is closely attached to the inner top surface of the heat conducting cover. By additional arrangement of the heat insulating spacer between the heat conducting cover and the snap-action thermostat with the hooks, influences on the thermistor in measurement of internal bottom temperature of an electric cooker are reduced, and thermistor sensitivity is improved.

The invention discloses a permanent-magnet DC motor speed online control method based on a membrane algorithm, comprising the following steps: S1, deriving input and output variables of a model needing to be built; S2, constructing a Gaussian process model and a second-order polynomial model; S3, constructing a three-layer membrane algorithm framework; and S4, completing speed control. As a biological heuristic algorithm with high parallelism, the membrane algorithm has good global and local optimization ability. Through the parallelism of the membrane algorithm, a prediction can be made quickly. Through communication between different membranes, the prediction effect of different models is enhanced. High-precision speed control can be achieved eventually. Moreover, the method has low requirement on the sensitivity of parameters, and involves very few parameters.

The invention discloses a nondestructive testing method of hot grid scanning thermal imaging. A temperature signal of a steady heat wave formed by a grid heat source on the surface of a thin film is recorded by a thermal imager, and horizontal and vertical cracks in the thin film are detected. According to the testing method, the requirements for the sampling frequency and the signal sensitivity of the thermal imager are lowered, the surface of the thin film is rarely disturbed by various defects such as the surface color and surface element distribution, the requirement for the sensitivity ofthe thermal imager signal is low, and the nondestructive testing method is especially suitable for thin films capable of withstanding the high temperature.

The invention relates to the technical field of geophysical exploration and development, in particular to an optimization system and method for a cross-well electromagnetic remote detection transceiving antenna. The system comprises a transmitting antenna circuit and a receiving antenna circuit. The transmitting antenna circuit comprises a transmitting coil L1, and the transmitting coil L1 is connected in series with a first tunable capacitor array through a first multiplexer switch S1; the receiving antenna circuit comprises a receiving coil L2, and the receiving coil L2 is connected in parallel with a second tunable capacitor array through a second multiplexer switch S2. According to the invention, the inter-well detection distance can be effectively increased, and the inter-well long-distance exploration and development capability is improved.

The invention discloses a trigger device for monitoring dropping process of tiny droplets. The trigger device is composed of a photoelectric receiving device, a convergent light path, connecting pieces, droplets, a drop channel, a convergent lens, a lens mounting cavity, an annular gasket, a light path channel, a cylindrical light path, a light source and a trigger line; the trigger device uses the principle of light reflection (droplets are reflected when passing through a parallel light path), and the lens is additionally added to converge the reflected light to monitor the dropping processof the tiny droplets (a droplet diameter is between 0.1 mm and 3 mm). Compared with a traditional trigger device, the monitoring range of the trigger device is widened, the accuracy of measurement results (convergence effects of trigger signals) is improved, the experimental cost (the sensitivity requirement of a photoelectric sensor is reduced) is reduced, and meanwhile, the space utilization rate of the experimental system (the same side arrangement of experimental equipment is adopted) is improved, and the dropping process of the droplets can be monitored more quickly, economically and accurately.

The invention discloses a flow control sealing mechanism and a yarn hairiness detection method based on the same. A circular spray pipe and a circular suction pipe right below the same are arranged ina shade of the flow control sealing mechanism; the circular spray pipe is provided with a plurality of nozzles which open downward; the circular suction pipe is provided with a plurality of nozzles which open upward. The flow control sealing mechanism and the yarn hairiness detection method based on the same have the advantages that the flow control sealing mechanism ensures cleanliness of an instrument test zone during testing, lodging of hairs is never caused due to air resistance, tips of hairs and yarn shanks are freely stretched, and therefore, image quality is improved and accuracy of test results is guaranteed; a central control system ensures action phase difference precision for a power supply source and an image acquirer; detection state is truly provided for moving yarns duringoperating, and reliable dynamic instrument state detection can be performed after static calibration; a light source has a high duty ratio, so that the heat problem is avoided.