100results about How to "Avoid low detection accuracy" patented technology

When OFDM signals are transmitted from a plurality of antennas, a pilot carrier is transmitted from one antenna among the plurality of antennas, and a null signal is transmitted from an antenna other than that antenna by a subcarrier of the frequency band that transmits the pilot carrier.

The invention provides an eyeglass detection method and device. The method concretely comprises the following steps of: acquiring an eyeglass region image from a face image to be detected; carrying out primary discrimination on the eyeglass region image according to a single-eye region classifier, and detecting according to a primary discrimination result, wherein the detecting process comprises the following steps of: if the absolute value of the primary discrimination result is more than a preset confidence threshold, outputting a detection result indicating whether a pair of eyeglasses are worn or not according to the primary discrimination result; and if the absolute value of the primary discrimination result is less than or equal to the preset confidence threshold, carrying out secondary discrimination on the eyeglass region image according a double-eye region classifier, and outputting the detection result indicating whether the eyeglasses are worn or not according to the secondary discrimination result. By adopting the method provided by the invention, the requirement on an initial face position is low, and the accuracy of eyeglass detection can be improved.

The embodiment of the invention provides an array substrate, a touch display panel, a touch pressure detection method and a display device and relates to the technical field of display. The invention aims to solve the problem of low detection precision when a pressure induction capacitor is used for detecting the touch pressure. The array substrate comprises a plurality of sub pixels and photo-sensors located in the sub pixels; the photo-sensors are respectively connected with a first voltage end and a scanning signal wire and a reading signal wire which are horizontally and vertically crossed; the photo-sensors are started under the control of the scanning signal wire and the first voltage end, so as to detect the touch pressure through photoelectric conversion, and a detection result is output through the reading signal wire.

A touch screen device has a screen main body including parallel transmitting electrodes and parallel receiving electrodes disposed in a grid shape; a transmitter sequentially selecting the transmitting electrodes and applying a drive signal; a receiver sequentially selecting the receiving electrodes, receiving a response signal output from the receiving electrode in response to the drive signal, and outputting detection data at each electrode intersection; a controller obtaining a touch position based on the detection data at each electrode intersection output from the receiver; and a reference signal generator outputting a reference signal for synchronized detection. The transmitter generates the drive signal from the reference signal. The receiver uses the reference signal to perform synchronized detection of a signal based on the response signal from the receiving electrode and generates the detection data.

An optical sensor circuit has a first optical sensor that outputs a signal according to the amount of received light on an opened light-receiving surface, a second optical sensor that is provided near the first optical sensor and outputs a signal according to the amount of received light on a shielded light-receiving surface, and a difference calculating circuit that calculates a difference between the output signal of the first optical sensor and the output signal of the second optical sensor and outputs the difference.

The invention provides a heart rate detection mattress and method. The heart rate detection method includes the steps of obtaining a heart rate vibration signal; selecting the heart rate vibration signal through a preset time window; inquiring about the local peak values in the heart rate vibration signal in the time window, wherein each local peak value is larger than the vibration amplitudes of a preset time point before the local peak value and a preset time point after the local peak value, and every two corresponding preset time points are continuous; calculating the credibility parameters of the local peak values according to the signal amplitudes of the local peak values and the time points, and marking the local peak values with the maximum credibility parameter numerical values as identification points in the time window; calculating the time interval between every two adjacent identification points in the heart rate vibration signal to serve as the heart rate period. By means of the scheme, error caused by the individual difference of detection objects can be avoided, and the detection accuracy is high.

The invention provides a catalyst deterioration detection device, which almost cannot cause the depravation of discharge characteristics and can detect the deterioration degree of the catalyst with high precision. The oxygen amount (OS) flowing into a ternary catalyst (14a) can be calculated according to the detected intake air flow (GAIR) and the output of an oxygen concentration transducer (17) at an upstream side of the ternary catalyst (14a). The dense / thin switchover control (disturbance) of the air-fuel ration can be done as per the comparative result of the oxygen amount (OS) and a target value (OSOBJR and OSOBJL). If the air-fuel ratio of the output (SVO2) of an O2 transducer (18) at a downstream side changes in large range in the disturbance, the ternary catalyst (14a) is determined to be deteriorated. If the ternary catalyst (14a) is normal, the output of the O2 transducer is hardly changed through the setting of the target value (OSOBJR and OSOBJL) properly.

An angular velocity detection device includes an angular velocity detector for delivering a first sensor output corresponding to an angular velocity of a mobile unit; a learning unit for learning a sensitivity coefficient in accordance with the first sensor output and an output provided by a GPS positioning unit; an acceleration detector for delivering a second sensor output corresponding to an acceleration of the mobile unit; a sensitivity coefficient correction unit for determining a corrected sensitivity coefficient in accordance with the sensitivity coefficient and the second sensor output; and an angular velocity converter for multiplying the first sensor output by the corrected sensitivity coefficient to thereby calculate the actual angular velocity of the mobile unit. The angular velocity detection device allows the angular velocity converter to use the corrected sensitivity coefficient to calculate each actual angular velocity of the mobile unit.

A touch screen device includes a panel disposed in a front surface of a plasma display panel and having a plurality of transmitting electrodes and receiving electrodes intersecting in a grid pattern; a transmitter that applies a driving signal to the transmitting electrodes; and a receiver receiving a response signal and outputs detection data for each intersection between electrodes, the response signal being output from the receiving electrodes in response to the driving signal applied to the transmitting electrodes. A controller obtains a touch position based on detection data for each intersection, the data being output from the receiver; and a maintenance discharge detector detects a maintenance discharge period of the plasma display panel. The controller, based on a detection result of the maintenance discharge detector, obtains the touch position based on the detection data for each intersection during a period excluding the maintenance discharge period.

The invention relates to an automatic detection method for microaneurysm in an eye fundus image on the basis of a local entropy determining threshold. The method comprises steps as follows: step one, the image is preprocessed to realize uniformity of brightness of the eye fundus image; step two, Gaussian matched filtering is adopted to enhance pixels of blood vessels and the microaneurysm in the image; step three, the eye fundus image is subjected to threshold segmentation by the aid of the local entropy determining threshold, and target areas of the blood vessels and the microaneurysm in the image are obtained through segmentation; step four, connected components extracted with mathematical morphology are added after segmentation, length screening is realized, mutually communicating blood vessel structures with the length exceeding a set threshold are removed from a selected dark area, and then a real microaneurysm structure can be detected; step five, noise disturbance points in the image are removed through double-loop filtering, and the accuracy rate of detection is increased. Compared with the prior art, the method has the advantages of high detection accuracy and the like.

The invention discloses a portable fruit internal-quality detection device using an optical detector. The device has a box body structure, and the side face of a case is provided with a displayer. A single-chip microcomputer, a fan, a power supply, a division plate, a fruit support table and the optical detector are arranged in the case. The optical detector completely integrates a light source, a light collecting element and an electronic element, is put just below the support table and can directly detect a near infrared spectrum of fruits. The device has the advantages of simple structure, small size, good stability and convenience and fastness in detection, collects spectra in a diffuse reflection mode, and is suitable for rapid non-destructive detection on site.

A method and device for classifying bone age pieces are provided in embodiments of the present application, in accordance with one embodiment of that present invention, The method comprises: obtaininga bone age piece of a user to be detected, Adjust the bones in the bone age pieces to the reference position, and then inputting the adjusted bone age pieces into the classification model to determine the types of bone age pieces. The classification model is determined after training the depth residual network with multiple bone age pieces of pre-labeled bone age pieces. The types of bone age pieces include left hand, right hand and non-hand. As a plurality of bone age pieces of a pre-marked bone age piece type are taken as a training sample, After the depth residual network is trained, the classification model is determined, and then the classification model is used to determine the type of bone age piece of the user to be detected, and the bone age piece of the left-handed type is usedto detect the bone age of the user to be detected, thus avoiding the problem of low detection accuracy caused by the non-standard bone age piece.

The invention discloses a variable seeding control system and method based on a pressure sensor. An acceleration sensor is mounted on a seeding tank; the pressure sensor is installed at the lower port of the seeding tank; an actual seeding rate is calculated by detecting weight change of the seeding tank through data fusion among the sensors; after comparing the actual seeding rate and a required seeding rate, when a difference value appears between the actual seeding rate and the required seeding rate, the rotation speed of a driving motor for a seeding device is adjusted automatically to control the difference value between the actual seeding rate and the required seeding rate within a relatively small range and meet seeding uniformity, thereby preventing detection precision reduction caused by seeding manners of the seeding machine and a seed falling process; and the motor is faintly adjusted by using a fuzzy adjustment unit, so that error accumulation caused by calculating the size of the adjustment speed by using an empirical equation between the seeding rate and the rotation speed is prevented. The system is simple in structure, can well detect the seeding rate under a vibration environment, is low in cost, and has very good popularization prospects.

A touch screen device includes a screen main body comprising a plurality of transmitting electrodes and a plurality of receiving electrodes and disposed in front of a plasma display panel; a transmitter sequentially selecting the transmitting electrodes and applying a drive signal to the selected transmitting electrodes; a receiver sequentially selecting the receiving electrodes, receiving a response signal output from each of the receiving electrodes in response to the drive signal, and outputting detection data at each electrode intersection; a discharge detector detecting discharge of each of the scanning electrodes of the plasma display panel; and a controller that obtains a touch position based on detection data of the discharge detector at each electrode intersection acquired from the response signals from the receiving electrodes positioned distant from the discharging scanning electrodes.

A sheet conveying apparatus including: a sheet conveying path through which a sheet is conveyed; a sensor unit configured to output a signal according to a characteristic of the sheet which is conveyed through the sheet conveying path; a pressure unit configured to press the sheet against the sensor unit; and a moving member protruding into the sheet conveying path, the moving member being moved by being pushed by the sheet passing through the sheet conveying path, wherein the pressure unit is interlocked with the moving member so that the sheet is pressed by the pressure unit against the sensor unit when the moving member is not pushed by the sheet, and a pressure force on the sheet applied by the pressure unit is released or reduced when the moving member is pushed by the sheet.

The invention relates to the field of medical instruments and particularly relates to a glucometer. The glucometer comprises a microprocessor, and comprises a testing piece inserting port and a correcting device. The testing piece inserting port is used for inserting a testing piece. The correcting device is used for collecting correcting code information on the testing piece. The microprocessor is used for providing corresponding current compensation according to the correcting codes collected by the correcting device. The correcting device is implemented in various forms, such as an RFID data collector, an image collector, or the correcting device comprises a touch control chip and a current-data converter. When the testing piece can be inserted into the testing piece inserting port, the correcting device directly collects the correcting code information on the testing piece and transfers the collected correcting code information to the microprocessor, and therefore manual inputting of the correcting codes is not needed, and selection of a coding device is also not needed, thus simplifying blood glucose detection steps and increasing the detection efficiency.

The invention discloses an indoor unit of an air conditioner. The indoor unit comprises a face frame, a panel, a display assembly and a circuit board. A mounting space is defined between the panel and the face frame; the display assembly is arranged in the mounting space; the circuit board is arranged in the mounting space and is adjacent to the panel, a light-sensitive element is arranged on the circuit board, a light-proof shading component is arranged between the circuit board and the panel, a sealed cavity is jointly defined by the shading component, the circuit board and the panel, the light-sensitive element is positioned in the sealed cavity, and light rays transmitted from the panel can be received and detected by the light-sensitive element. The indoor unit of the air conditioner in an embodiment of the invention has the advantages that the indoor unit is provided with the sealed cavity, so that only the light rays transmitted from the panel can be received by the light-sensitive element, the light-sensitive element can be prevented from being disturbed by light rays from other positions such as LED lamps, the intensity of the external light rays can be accurately judged, and light intensity signals can be accurately fed to a display control circuit on the circuit board.

A sheet conveying apparatus including: a sheet conveying path through which a sheet is conveyed; a sensor unit configured to output a signal according to a characteristic of the sheet which is conveyed through the sheet conveying path; a pressure unit configured to press the sheet against the sensor unit; and a moving member protruding into the sheet conveying path, the moving member being moved by being pushed by the sheet passing through the sheet conveying path, wherein the pressure unit is interlocked with the moving member so that the sheet is pressed by the pressure unit against the sensor unit when the moving member is not pushed by the sheet, and a pressure force on the sheet applied by the pressure unit is released or reduced when the moving member is pushed by the sheet.

The invention provides a vehicle remaining oil quantity detection method and device, a vehicle and a storage medium. The method comprises the steps of: determining the current acceleration and the current angle of a vehicle according to current vehicle state parameters; obtaining an oil quantity voltage value output by the oil quantity sensor in a set time period according to a preset period so asto obtain a first preset number of oil quantity voltage values, and determining a current oil quantity voltage mean value based on the first preset number of oil quantity voltage values; according tothe current acceleration and the current angle, determining whether a current oil quantity voltage mean value is reserved or not; when it is determined that the current oil quantity voltage mean value is reserved, determining the current oil quantity resistance value according to the current oil quantity voltage mean value; determining a current oil quantity resistance mean value according to a second preset number of oil quantity resistance values and the current oil quantity resistance value which are sequentially determined and obtained from the current moment to the front; and based on the corresponding relation between the pre-stored residual oil quantity of the oil tank and the oil quantity resistance value, determining the current residual oil quantity of the vehicle according to the current oil quantity resistance mean value.

A passenger conveyor comprises an entrance preventing section which, in order to prevent entrance of passengers onto a deck outside a handrail, is disposed on the deck outside the handrail in the vicinity of an area for getting on and off, and an information display section disposed on the entrance preventing section for displaying information for the passengers getting on and off.

To prevent the deterioration of the detection accuracy of an object which comes into contact with a slit nozzle. The substrate treating device is provided with detection sensors 450, 451, and 452 which detect the object which comes into contact with the slit nozzle. The laser light rays of the detection sensors 450, 451, and 452 are set so that the rays may be narrowed down at positions shifted in the Y-axis direction. In this way, the effective detecting ranges E1, E2, and E3 of the sensors 450, 451, and 452 inspect the scanning range E0 of the slit nozzle in a shared state. When the object is detected at one of the sensors 450, 451, and 452 on the basis of the detected results of the sensors 450, 451, and 452, the movement of the slit nozzle is stopped and a warning is displayed.

Resin members, on the surfaces of which metal films are formed, are used for; an auxiliary air passage provided in a main air passage, in which a sensor element of a physical quantity sensor such as an air flow sensor, an intake-air temperature sensor, etc., is situated; a housing; and so forth; in order to decrease both the thermal conductivity and the emissivity of those components to respective small values, whereby the temperature increase of the sensor due to both the heat conduction and the heat radiation can be suppressed.

An image recording apparatus has a recording head for recording an image on a recording medium, an ink supply source for supplying an ink to the recording head through an ink tube, a carriage for mounting the recording head thereon reciprocating in a primary scanning direction, and first and second guide members for supporting the carriage thereacross and guiding reciprocating movement of the carriage. The apparatus includes a scale provided on the second guide member along the primary scanning direction, a detector provided on the carriage for detecting a reciprocating position of the carriage in corporation with the scale, and a partition disposed in the vicinity of the scale for separating at least a part of the ink tube from the scale.

The invention discloses a polygonal mirror driving motor and a laser mirror irradiation device equipped with the polygonal mirror driving motor, which can prevent the deviation of the synchronization signal itself from reducing the detection accuracy caused by the installation error of various components, and then can accurately detect and control from A signal for the emission timing of the laser beam emitted from the laser light source. It is characterized by setting a frequency generating magnetizing part (FG magnet 7), a frequency generating pattern (FG pattern 6), and a frequency dividing circuit 24, and using the frequency dividing circuit 24 to generate frequency when the frequency generating magnetizing part (FG magnet 7) rotates The signal detected in the pattern (FG pattern 6 ) is frequency-divided into the number of mirror surfaces of the polygon mirror 14 and output.

A printed circuit substrate appearance inspection method comprising: an inspection area defining step defining a predetermined inspection area on an image of a printed circuit substrate including a component mounted on the printed circuit substrate; and an appearance inspection step carrying out appearance inspection of the component by analyzing image data in the thus-defined inspection area, wherein: the inspection area defining step comprises the steps of; detecting a printed substrate pattern part around the component on the printed circuit substrate; and defining the predetermined inspection without overlapping with the thus-detected printed substrate pattern part.

A ventilating fan, includes a humidity sensor box, provided with an air inlet in a bottom surface facing an suction opening and an air outlet in a top surface opposite to the bottom surface; a humidity sensor located inside the humidity sensor box and adapted to detect the humidity of the air passing through the humidity sensor box; and a humidity sensor circuit board located inside the humidity sensor box, disposed perpendicular to the bottom surface and adapted to control the humidity sensor. The air may flow at a high speed in the humidity sensor box, and it is easy for the water vapor to be taken out of the humidity sensor box without being accumulated inside the humidity sensor box, thereby suppressing the influence of the water vapor or the water droplet on the humidity sensor and enabling the humidity sensor to accurately detect the indoor humidity.

The present invention provides oil sensor placement structure of engine. In an engine, an oil level sensor (47) provided at the bottom of an oil pan (15) that contains engine oil and upstanding upward in the vertical direction is placed between a pair of balancer shafts (27, 28) that are received in parallel to each other in a balancer housing (21) provided between the lower surface of a cylinder block and the oil pan (15). A dead space formed between the pair of balancer shafts (27, 28) is effectively used to allow the oil level sensor (47) to be compactly received. Also, the pair of balancer shafts (27, 28) suppress agitation of the engine oil to prevent degradation of detection accuracy caused by splash of the oil on the oil level sensor (47).

The invention discloses a wavelet packet decomposition based gas turbine engine combustion signal analysis method. The wavelet packet decomposition based gas turbine engine combustion signal analysis method comprises the steps of using a sensor to acquire combustion signals in a multi-channel mode, filtering and amplifying the acquired combustion signals, then transmitting the signals to a CPU processor through an FPGA module, establishing a wavelet packet decomposition algorithm in the CPU processor to analyze the combustion signals in a frequency band dividing mode, then respectively transmitting analysis results to a human-computer interface and a control system. The wavelet packet decomposition based gas turbine engine combustion signal analysis method can accurately acquire a combustion pressure pulse signal of a combustion gas turbine and can send a corresponding instruction according to the acquired signal so as to ensure normal, stable and safe operation of a unit.