35results about How to "Guaranteed reading accuracy" patented technology

The invention discloses a mechanical pointer pressure gauge reading identification method. The method comprises steps of carrying out image filtering and binarization processing; through two times ofHough transformation, acquiring an accurate instrument dial center coordinate. After dial contour extraction, carrying out polar coordinate transformation on the contour coordinate group; taking the center coordinate of the instrument dial as a circle center; carrying out scale search recognition, obtaining dial scale area, carrying out scale calibration in a scale identification result area; obtaining a calibrated two-dimensional vector about the angle and the scale; converting a scale identification problem into a two-dimensional vector processing problem; constructing a standard scale vector, calculating the distance between the two-dimensional identification vector of the angle and the scale and the standard scale vector, taking the minimum value of the distance between the two vectorsas the starting and ending positions of the standard scale, and solving the position of the pointer by adopting a method of solving the minimum value of the gray average value of the circular ring inthe scale ring. The method has the advantages that the mechanical pointer pressure gauge reading is automatically identified, and the reading accuracy is ensured.

The invention discloses an automatic interpretation method for a telemetering slow variation parameter based on a historical data statistical property. The method comprises the steps of 1, constructing a historical model database; 2, interpreting the parameter; 3, unifying sampling points of an effective data segment of parameter historical data to the sampling points of the effective data segmentof target data; 4, estimating the target data of the parameter; 5, estimating a standard deviation of the parameter; 6, dividing the target data into four intervals: 0-1 sigma, 1 sigma-2 sigma, 2 sigma-3 sigma and 3 sigma-4 sigma according to an estimated value and the standard deviation of the parameter target data; 7, counting a probability distribution of the parameter target data in each interval; 8, obtaining a potential abnormality parameter table; and 9, checking potential abnormality parameters one by one by an artificial expert based on the potential abnormality parameter table obtained by the abovementioned step and according to an auxiliary decision graph obtained by analysis to finally determine telemetering abnormality parameters in the flight process. With the automatic interpretation method for the telemetering slow variation parameter based on the historical data statistical property, the defects of low artificial interpretation efficiency and data utilization rate areovercome and a lot of manpower is saved for a test process of a carrier rocket and an aircraft.

The invention discloses a concrete biaxial strength measuring device, comprising a mounting bottom plate, a metal frame, a first bracket, a first sleeve ring, a locking pin, first mounting blocks andsecond mounting blocks, wherein a plurality of balls uniformly arranged are movably connected to the inner sides of the first mounting blocks, a pressure cylinder is connected between the outer side of the first mounting block on either side and the metal frame on the same side, a first mounting plate is arranged on the inner side of each first mounting block, the inner side of each first mountingplate is fixedly connected with a pressure loading head, a second sliding rod is fixedly connected to the inner side of each second mounting block through two second brackets, a second sleeve ring movably sleeves each second sliding rod, the outer side of each second sleeve ring is connected with a second mounting plate through a steel rope, the inner side of each second mounting plate is movablyhinged to a tension loading head, and a tension cylinder is connected between the outer side of the second mounting block on either side and the metal frame on the same side. The concrete biaxial strength measuring device can overcome the deficiencies in the prior art and has more accurate tensile strength test data.

The invention provides a method and a system for reading information of a storage array unit. The method comprises the following steps of: simultaneously gating a plurality of continuous bit lines comprising a bit line of a read unit, applying first reading voltage to one bit line of a read storage unit, applying second reading voltage to at least one continuous bit line which comprises the other bit line of the read storage unit, wherein the second reading voltage is higher than the first reading voltage, and applying voltage which is equal to the second reading voltage to a bit line which is adjacent to the bit line of the second reading voltage. Potential difference does not exist at two ends of each of a plurality of storage units which are adjacent to a bit line, which has high voltage, of the read storage unit, so time required by charging to the second reading voltage by the bit line of the read storage unit is not prolonged, and the reading accuracy of the read storage unit can be guaranteed.

The invention discloses an angle and distance testing device and an angle and distance testing method of an ultrasonic probe. The angle and distance testing device comprises a transverse supporting rail, wherein a base disc which can rotate relative to the transverse supporting rail is fixed thereon, one side of the base disc is provided with an angle disc, the angle disc and a longitudinal sliding rail are arranged on the same side, a vertical sliding rail is fixed on the base disc, and the ultrasonic probe is installed on the vertical sliding rail; and the longitudinal sliding rail is fixed to one side of the transverse supporting rail, the longitudinal sliding rail is perpendicular to the transverse supporting rail or intersects with the transverse supporting rail to form a set angle, a target component used for determining a detection distance of the ultrasonic probe is arranged on the longitudinal sliding rail, and the target component is fixed on the longitudinal sliding rail in a slidable manner. The angle and distance testing device can realize the measurement of three kinds of data, is simple and feasible integrally, ensures the stability of the ultrasonic probe and the target component through cross fixation of the transverse supporting rail and the longitudinal sliding rail, ensures the rotational stability of the base disc through arranging the base disc and universal-ball bearings, and ensure the reading precision of the entire device.

The invention discloses an automatic Code128 bar code reading method based on global optimization, and relates to the field of barcode recognition, the method includes converting the probability valueinto an information entropy expression mode; therefore, the product calculation for solving the maximum probability is equivalently transformed into the summation calculation for solving the maximuminformation entropy; the method comprises the following steps of: obtaining probability values, namely information entropies, of six characters in a certain character; obtaining a character possibly corresponding to the maximum probability by adopting a global probability optimization mode; a character recognition result does not only depend on accurate recognition of each single character; secondly, correcting a result among all the characters by utilizing a code128 check rule; according to the technical scheme, the maximum total probability of the recognition result is taken as the target onthe premise that the recognition result meets the coding rule, the final decoding result does not depend on accurate recognition of each character, and the problems that bar code image imaging is damaged due to multiple factors of a bar code, and an existing bar code processing scheme has a high bar code rejection rate are solved.

The invention discloses a gate opening ruler reading method, relates to the field of intelligent ruler reading, aims to solve the problems in the prior art. The gate opening ruler reading method aims to detect a target set on an opening ruler through a target detection method and obtain the accurate opening of a gate according to the position relationship among targets. According to the invention, after the preset bit set is set, the camera can rotate to each preset bit in the preset bit set and photograph, the target detection algorithm is combined with the digital image processing algorithm, only appropriate target-level manual labeling is needed, and under the condition that the target is not detected by the target detection method, the vernier target is detected again by using a digital image processing algorithm; according to the method, high precision and low omission ratio are ensured under the condition that the real-time requirement is met. Therefore, the analyzable opening degree range is greatly expanded, and the analyzable opening degree range is expanded to ten meters under the condition that the reading precision is guaranteed.

The invention discloses a servo signal processing system, including a laser head amplifier, a radio frequency amplifier, a focus error detection device, a tracking error detection device, a multiplexer, an analog-to-digital converter, a servo DSP, a focus coil, a focus driver, a tracking coil, Tracking drive, digital-to-analog converter, feed motor, feed drive, spindle motor, three-phase spindle drive, PWM converter, the laser head amplifier, radio frequency amplifier connection, the focus error detection device, tracking error detection The devices are respectively connected with radio frequency amplifiers, the focus error detection device and the tracking error detection device are respectively connected with a multiplexer, the multiplexer is connected with an analog-to-digital converter, and the analog-to-digital converter is connected with a servo DSP. The present invention realizes the purpose of improving the focusing speed of the video disc player and ensuring the reading accuracy of the video disc player through the laser head amplifier, the radio frequency amplifier, the focus error detection device and adding feedback.

A power circuit is adapted for providing a programming voltage to an electronic fuse circuit, and includes a pass transistor of a P-type metal-oxide-semiconductor transistor, a buffer circuit, and a bulk voltage control circuit. The pass transistor includes a bulk electrode, a gate electrode, a first source/drain electrode receiving a system high voltage, and a second source/drain electrode connected to a bit line. The buffer circuit provides a control voltage to the gate electrode of the pass transistor. The pass transistor is turned on during a programming operation and turned off during a reading operation. The bulk voltage control circuit independently provides a bulk voltage to the bulk electrode. A last-stage buffer of the buffer circuit is also activated by the bulk voltage to control the pass transistor during the reading operation of the electronic fuse circuit. A method for providing power to an electronic fuse circuit is also provided.

The invention relates to the technical field of vehicle lamps, in particular to a convenient-to-detect lens module which comprises a bottom frame, a supporting frame installed on the upper end face of the bottom frame and a display screen installed on the supporting frame, the upper end face of the supporting frame is fixedly connected with an outer frame, and a covering plate is rotationally connected into the outer frame; a supporting plate is hinged to the bottom end face of the covering plate; the supporting plate is kept horizontal through a stabilizing part; the covering plate can cover the display screen, so that the covering plate can block stains, the display screen is further protected, the reading accuracy of the display screen is guaranteed, the detection accuracy is further improved, and at the moment, the supporting plate is transversely arranged below the covering plate, and the supporting plate is hidden between the covering plate and the display screen; the covering plate can be stored in the outer frame, at the moment, the supporting plate is transversely arranged above the display screen and is in an exposed state, at the moment, the supporting plate is suitable for containing tools such as cleaning rag, and then the effect of rapidly cleaning the display screen can be achieved.

According to the invention, the phase information of the RFID tag response signals collected by the RFID access control equipment is fully utilized to analyze the phase information of the RFID tag response signals, and the phase characteristics of the RFID tags with access behaviors (the motion trails pass through the access control equipment) and the phase characteristics of the RFID tags without access behaviors are obviously different. According to the method, whether the read RFID tag has the access behavior or not is judged, tag data judged to have no access behavior are filtered out, the reading accuracy of the RFID access control equipment is guaranteed, and the method has the advantages of being simple, feasible and low in cost.