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48results about How to "Suppress misjudgment" patented technology

Car collision detection method and device based on three-shaft acceleration sensor

ActiveCN104021601ASolve the problem of high misjudgment rate of collision detectionImprove computing efficiencyRegistering/indicating working of vehiclesCollision detectionClassical mechanics
The invention discloses a car collision detection method and device based on a three-shaft acceleration sensor; the method is as follows: collecting three shaft acceleration values once by the three-shaft acceleration sensor in every scheduled time; reading current three shaft acceleration values of a car, performing arithmetic average processing on predetermined times of three shaft acceleration values before the current three shaft acceleration values of the car, calculating the average value of the predetermined times of three shaft acceleration values on each shaft; calculating the difference values between the current three shaft acceleration values of the car and the average value corresponding to each shaft, and judging whether the car collision happens according to the difference values and threshold. The car collision detection method and device can effectively suppress influences caused by abnormal sudden beats during sensor sampling, effectively avoid detection misjudgment caused by angle difference of equipment installation, and effectively inhibit collision detection misjudgment caused by normal acceleration and deceleration, and is high in accuracy and low in misjudgment rate.
Owner:SHENZHEN APICAL TECH CO LTD

Inter-cylinder air-fuel ratio imbalance detection apparatus for internal combustion engine

An air-fuel ratio imbalance detection apparatus includes an air-fuel ratio sensor that is arranged in an exhaust passage of an internal combustion engine and that includes an electrode and a diffusion layer provided on the electrode; an estimating unit configured to estimate or detect an output variation amount that is an amount of variation in an output of the air-fuel ratio sensor due to an influence of a pressure pulsation of exhaust gas from the internal combustion engine; and a determination unit configured to determine whether there is an air-fuel ratio imbalance among cylinders of the internal combustion engine, on the basis of the output variation amount and a determination value based on the output of the air-fuel ratio sensor.
Owner:TOYOTA JIDOSHA KK

Photovoltaic system MPPT (maximum power point tracking) control method based on adaptive prediction

The invention discloses a photovoltaic system MPPT (maximum power point tracking) control method based on adaptive prediction. The method adds an adaptive prediction mechanism to the conventional disturbance observation method, samples the photovoltaic array voltage at multiple moments at present and in the past, predicts the photovoltaic array output power at the next moment by use of the adaptive prediction mechanism, and judges the disturbance direction of the photovoltaic array voltage in advance in combination with the disturbance observation method so as to increase the tracking speed; and meanwhile, the method considers the control precision of the system, reduces the power loss and realizes quick and stable control on the photovoltaic system MPPT. The control method overcomes the shortcomings of slow tracking, low stability, complicated control and the like of the conventional MPPT algorithm, and inhibits the misjudgment phenomenon in the environment with low irradiance and quick change of irradiance. The control method is simple and easy to realize through software programming, can effectively improve the efficiency of the photovoltaic power generation system, and has a great application value in a photovoltaic system.
Owner:惠州市日恒科技有限公司

Overhead structure determination device and driving assistance system

An overhead structure determination device mounted in a vehicle includes a sensor, a target information acquisition device, a road surface height acquisition device, and a determination device. The target information acquisition device detects a target in front of the vehicle using the sensor and acquires a relative position and a relative height of the target with respect to the vehicle. The road surface height acquisition device acquires a relative height of a below-target road surface with respect to the vehicle as a road surface height. The below-target road surface is a road surface at the relative position of the target. When a difference between the relative height of the target and the road surface height exceeds a threshold, the determination device determines that the target is an overhead structure present above a height of the vehicle.
Owner:TOYOTA JIDOSHA KK

Engine detonation detection method and preignition detection method of engine

ActiveCN106706205AIncrease Knock Detection ThresholdSuppress misjudgmentMachines/enginesEngine componentsInjectorBackground noise
The invention discloses an engine detonation detection method. A crankshaft phase of a detonation identification window of a current combustion cylinder is compared with a crankshaft phase of an oil-fuel injector needle-valve seating period of a next combustion cylinder; whether oil-fuel injector seating noise enters the detonation identification window of the current combustion cylinder is determined; if so, an overlapping detonation intensity Cvirkr of the current combustion cylinder is calculated by using default background noise Srkr before the detonation identification window of the current combustion cylinder comes, wherein the Cvirkr is equal to ikr / Srkr and the ikr expresses a detonation sensor signal integration value of the detonation identification window of the current combustion cylinder; and bercause the default background noise is larger than a detonation sensor signal integration value of a detonation identification window of an internal combustion cylinder normally and a detonation detection threshold value increases, erroneous engine detonation judgement caused by entrance of the oil-fuel injector seating noise into the detonation identification window of the current combustion cylinder can be reduced. In addition, the invention also discloses a preignition detection method of an engine.
Owner:UNITED AUTOMOTIVE ELECTRONICS SYST

Engine knock detection method and engine pre-ignition detection method

ActiveCN106762327APerfect knock detection functionIncrease Knock Detection ThresholdMachines/enginesIgnition automatic controlCombustionInlet valve
The invention discloses an engine knock detection method. A knock recognition window of a current combustion cylinder and the crankshaft phase position of the closing time period of an air inlet valve of a next combustion cylinder are compared, whether the closing noise of the air inlet valve enters the knock recognition window of the current combustion cylinder or not is judged, if the closing noise of the air inlet valve enters the knock recognition window of the current combustion cylinder, when the knock recognition window of the current combustion cylinder comes, the overlapping knock strength Cvirkr of the current combustion cylinder is calculated through the default background noise Srkr, Cvirkr=ikr/Srkr, ikr is a knock sensor signal integration variable of the knock recognition window of the current combustion cylinder, and because the default background noise is larger than the knock sensor signal integration variable of the knock recognition window of an internal combustion cylinder under the normal condition, and a knock detection threshold is improved, the engine knock misjudgment caused when the closing noise of the air inlet valve enters the knock recognition window of the current combustion cylinder can be reduced. The invention further discloses an engine pre-ignition detection method.
Owner:UNITED AUTOMOTIVE ELECTRONICS SYST

Input device, control method of input device, and program

An input device includes a sensor unit, a processing unit, a storage unit, and an interface unit. The processing unit includes: a change amount calculating section for calculating the temporal change amount of the electrostatic capacitance that is detected by the sensor unit and that changes according to the proximity degree of an object with respect to a detection surface; a determination section for determining a touch operation corresponding to an operation on the detection surface using a fingertip, a palm operation corresponding to an operation on the detection surface using a palm, and a grip operation corresponding to an operation on a conductor portion, based on the calculated change amount; and a reset section for performing reset processing in a case where the duration of a state, in which a palm operation is not determined and a grip operation is determined, is a first predetermined time or more.
Owner:ALPS ALPINE CO LTD

Medical image processing method and device, electronic equipment and medium

The embodiment of the invention discloses a medical image processing method and device, electronic equipment and a medium, and the method comprises the steps: inputting a to-be-detected original image into a feature extraction model, generating a feature map sequence of multiple stages, and selecting a feature map sequence of one stage as a to-be-detected feature map sequence; inputting the to-be-detected feature map sequence into the classifier, generating a prediction probability value of each category, and determining a target category value; generating a corresponding mask input image based on the to-be-detected feature image and the to-be-detected original image of each dimension; based on the mask input image of each dimension and the target category value, obtaining the weight of the to-be-detected feature image of each dimension for the to-be-detected original image; and generating a target visualization result according to the to-be-detected feature images of all dimensions and the weight of each to-be-detected feature image for the to-be-detected original image. The accuracy of early cancerization lesion area prediction is improved, and a lesion explanation basis can be provided for each prediction stage.
Owner:南京英沃夫科技有限公司
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