35results about How to "Guarantee the accuracy of judgment" patented technology

The invention relates to the field of communication and discloses a positioning method and a device of the positioning method. The method comprises the following steps that signals from all satellites are captured to obtain capturing signals; the capturing signals are tracked to obtain tracking signals; signal quality parameters of all the tracking signals are calculated, and the tracking signals with the signal quality parameters meeting the quality judgment condition in all the tracking signals are determined as high quality signals, wherein the signal quality parameters at least comprise a Doppler error and/or a carrier-to-noise ratio; at least four high quality signals are selected to carry out PVT calculation to obtain positioning information and timing information. Signal quality judgment is carried out on all tracked satellites, the high quality signals are selected from the signals to carry out a subsequent resolving procedure, the quality of the signals involved in resolving is improved, and the positioning accuracy of the positioning method and the device in an implementation mode is improved.

The invention discloses a parking space occupancy judgment method and device. The method includes: acquiring, by detection equipment, a geomagnetic value output by a geomagnetic sensor corresponding to a parking space, wherein the detection equipment comprises an ultrasonic sensor; if the geomagnetism value is less than or equal to a first geomagnetic threshold, obtaining, by the detection equipment, an ultrasonic value output by the ultrasonic sensor, wherein the first geomagnetic threshold is an upper limit value of a first preset interval; if the ultrasonic value is in a second preset interval, or the geomagnetic value is greater than or equal to a second geomagnetic threshold and less than or equal to the first geomagnetic threshold and the ultrasonic value is less than a lower limit value of the second preset interval, obtaining a first weight value and a second weight value corresponding to the geomagnetic value and a third weight value and a fourth weight value corresponding tothe ultrasonic value, and determining, by the detection device according to the first weight value, the second weight value, the third weight value and the fourth weight value, whether the parking space is occupied.

The invention discloses a method for detecting a routing link in a wireless Ad hoc network, which comprises the steps of detecting packet loss ratio of a routing link, judging that the current routing link is interrupted if the packet loss ratio exceeds a reference threshold, performing failure marking of the interrupted link, and immediately starting a route setup process. The method detects the failure of the link by using the packet loss ratio of a unicast data service packet in a certain period of time, so as to improve the timeliness and the effectiveness of routing link failure detection.

The invention relates to the technical field of vehicle pedestrian protection, and discloses a pedestrian protection active pop-up system and a vehicle. The pedestrian protection active pop-up systemcomprises an anti-collision beam, an engine compartment cover and a pop-up device. The pop-up device comprises a pressure sensor, a lifter, a supporter and a controller. The anti-collision beam is arranged on a front bumper of the vehicle, the pressure sensor is arranged in the anti-collision beam, the lifter is disposed below the engine compartment cover and used for lifting the engine compartment cover, the supporter is connected with a vehicle body and used for the supporting and returning of the lifted engine compartment cover, and the controller is used for receiving a pressure signal value of the pressure sensor and controlling the lifting of the lifter according to the pressure signal value. In the pedestrian protection active pop-up system, when a pedestrian collides with the vehicle, the engine compartment cover bounces, which increases a safe energy absorption space above the engine compartment cover, reduces the damage value of the head impacting the compartment cover and reduces the damage caused by the collision between the vehicle and the head of the pedestrian; and at the same time, the jacked engine compartment cover can return quickly, to avoid blocking a driver'sfront line of sight.

The invention discloses a video decoding error compensation method and device, a storage medium and a terminal. The video decoding error compensation method comprises the steps that for each lost macro block of a lost area in a current frame, determining an adjacent macro block of the lost macro block and a reference macro block located in a reference frame, wherein the position of the referencemacro block in the reference frame is the same as the position of the lost macro block in the current frame; determining candidate motion vectors of the reference macro block and the adjacent macro block; determining residual energy corresponding to each candidate motion vector according to the residual value of each pixel recorded in the decoding process, wherein the residual energy is the sum ofabsolute values of the residual values calculated according to the size of the lost macro block; and determining a compensation reference vector according to the magnitude of the residual energy corresponding to each candidate motion vector, and compensating the lost macro block by using the compensation reference macro block pointed by the compensation reference vector. Through the technical scheme of the invention, the convenience and accuracy of video decoding error compensation can be improved.

A hardware criterion circuit for single-phase grounding protection line selection comprises a current sampling module and a voltage sampling module, wherein the current sampling module is connected with a first filter circuit; the voltage sampling module is connected with a second filter circuit; the first filter circuit is connected with a differentiating circuit; the second filter circuit is connected with a phase-correcting circuit; the differentiating circuit is connected with a first amplifying circuit; the phase-correcting circuit is connected with a second amplifying circuit; the first amplifying circuit is connected with a current direction judging circuit; the second amplifying circuit is connected with a voltage direction judging circuit; the current direction judging circuit and the voltage direction judging circuit are connected with a power direction judging circuit; the criterion circuit formed by the various circuits is completely triggered by hardware, instantaneous transient power can be captured, and a transient power method is adopted, so that the criterion accuracy is improved; besides, by adopting the hardware, the transient direction can be judged, a single chip microcomputer enters the sleeping mode, the energy consumption demands are reduced, a transient signal can be provided, a multiple criterion manner is supported, the criterion is no longer unitary, and the single-phase grounding judgment accuracy is further fully ensured.

The invention relates to the technical field of anti-electricity-stealing analysis, and discloses a medium-voltage anti-electricity-stealing analysis method based on coding correlation, which comprises the following steps that: a master station acquires daily frozen electric quantity data of a line general meter and each line gateway meter; preprocessing the daily frozen electric quantity data; subtracting the sum of the table day frozen electric quantity data of each line gateway from the total table day frozen electric quantity data to obtain a line day line loss value; performing first-order difference operation on the daily freezing electric quantity of each line gateway and the daily line loss value of the line; coding according to a first-order difference operation result; obtaining a correlation coefficient between each line gateway table and a line daily line loss value according to a coding result; the line gateway meters with the correlation coefficients exceeding a certain threshold value are suspected electricity stealing meters. According to the method, electricity stealing prevention equipment does not need to be additionally arranged on the line, electricity stealing judgment can be achieved only by freezing the daily electricity data of the line general meter and the line gateway meters, on the basis that judgment accuracy is guaranteed, the workload is small, implementation is easy, and time, economic cost and labor cost are saved.

The invention provides an entry slip state filtering detection method and entry slip printing equipment. The entry slip state filtering detection method comprises the following steps of: continuously sensing an entry slip, outputting data 1 when the entry slip is sensed, and outputting data 0 when the entry slip is not sensed; sequentially storing the data into windows with fixed lengths according to a moment relationship; summing the data falling in the windows; comparing the value obtained by the summation processing with a set threshold value; if the value obtained by the summation processing is smaller than the set threshold value, judging that no entry slip exists;and otherwise, judging that the entry slip exists. According to the entry slip state filtering detection method, the initial sensing data are digitally processed, then the data are stored in the windows with the fixed lengths for summation processing, and the entry slip state is judged again; and thus, the judgment accuracy of the entry slip state can be guaranteed, a sliding window is filtered, the delay time is shortened, and the response time of the output result is prolonged.

The invention discloses a method for judging abnormity of a balance winding of a large transformer, and belongs to the technical field of transformer abnormity diagnosis. The method comprises the following steps: applying symmetrical 380V alternating-current voltage to three phases of a high-voltage side of a normally operating transformer, measuring voltage at two ends of a balance winding, and taking the voltage as an initial value U0; when a fault needs to be judged, applying 380V alternating-current voltage to the high-voltage side of the transformer, and measuring the voltage U1 at the two ends of the opening of the balance winding; and comparing the measured voltage U1 with an initial test value U0 to judge whether the balance winding is abnormal or not. The test method is simple, the number of test instruments is small, manpower is greatly reduced, and abnormity of the balance winding of the large transformer can be rapidly and accurately judged.

The invention provides an air writing text input method and device, characters are written in the air by using a handheld writing rod, a writing process is acquired and displayed by using an embedded platform device with a display screen and a camera, and text input including three character types of numbers, symbols and English is realized through methods of target tracking, text recognition and the like. Contactless and convenient man-machine interaction is achieved. Comprising the steps of initializing an air writing text input system; holding the writing rod with a hand to enter the aerial area monitored by the camera and moving the writing rod into the tracking frame; tracking the writing stick by using a target tracking model, and determining the position of a current tracking frame; judging whether to switch the input character type or not; writing characters in the air by using a writing rod, and generating a character image; recognizing the character image by using a character recognition model to recognize characters; character display is added; judging whether to clear the added and displayed characters or not; clearing the added and displayed characters; and judging whether the input of all characters in the text is ended.

The invention discloses a carrier rocket launch and control signal measurement method, which realizes high-precision detection of uncharged launch and control signals of a carrier rocket in the test and launch process and flexible setting of effectiveness determination threshold of the uncharged launch and control signals, and meanwhile, can finish high-precision timing of valid and invalid statesof the launch and control signals, thereby ensuring accuracy of signal acquisition and accuracy of judgment, and providing the high-precision launch and control signals for the test and launch process of the carrier rocket.